Commit | Line | Data |
---|---|---|
e0001a05 | 1 | /* Xtensa-specific support for 32-bit ELF. |
4dfe6ac6 | 2 | Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
aa820537 | 3 | Free Software Foundation, Inc. |
e0001a05 NC |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU General Public License as | |
cd123cb7 | 9 | published by the Free Software Foundation; either version 3 of the |
e0001a05 NC |
10 | License, or (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
3e110533 | 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
53e09e0a | 20 | 02110-1301, USA. */ |
e0001a05 | 21 | |
e0001a05 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
e0001a05 | 24 | |
e0001a05 | 25 | #include <stdarg.h> |
e0001a05 NC |
26 | #include <strings.h> |
27 | ||
28 | #include "bfdlink.h" | |
29 | #include "libbfd.h" | |
30 | #include "elf-bfd.h" | |
31 | #include "elf/xtensa.h" | |
32 | #include "xtensa-isa.h" | |
33 | #include "xtensa-config.h" | |
34 | ||
43cd72b9 BW |
35 | #define XTENSA_NO_NOP_REMOVAL 0 |
36 | ||
e0001a05 NC |
37 | /* Local helper functions. */ |
38 | ||
f0e6fdb2 | 39 | static bfd_boolean add_extra_plt_sections (struct bfd_link_info *, int); |
2db662be | 40 | static char *vsprint_msg (const char *, const char *, int, ...) ATTRIBUTE_PRINTF(2,4); |
e0001a05 | 41 | static bfd_reloc_status_type bfd_elf_xtensa_reloc |
7fa3d080 | 42 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
43cd72b9 | 43 | static bfd_boolean do_fix_for_relocatable_link |
7fa3d080 | 44 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *); |
e0001a05 | 45 | static void do_fix_for_final_link |
7fa3d080 | 46 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *, bfd_vma *); |
e0001a05 NC |
47 | |
48 | /* Local functions to handle Xtensa configurability. */ | |
49 | ||
7fa3d080 BW |
50 | static bfd_boolean is_indirect_call_opcode (xtensa_opcode); |
51 | static bfd_boolean is_direct_call_opcode (xtensa_opcode); | |
52 | static bfd_boolean is_windowed_call_opcode (xtensa_opcode); | |
53 | static xtensa_opcode get_const16_opcode (void); | |
54 | static xtensa_opcode get_l32r_opcode (void); | |
55 | static bfd_vma l32r_offset (bfd_vma, bfd_vma); | |
56 | static int get_relocation_opnd (xtensa_opcode, int); | |
57 | static int get_relocation_slot (int); | |
e0001a05 | 58 | static xtensa_opcode get_relocation_opcode |
7fa3d080 | 59 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
e0001a05 | 60 | static bfd_boolean is_l32r_relocation |
7fa3d080 BW |
61 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
62 | static bfd_boolean is_alt_relocation (int); | |
63 | static bfd_boolean is_operand_relocation (int); | |
43cd72b9 | 64 | static bfd_size_type insn_decode_len |
7fa3d080 | 65 | (bfd_byte *, bfd_size_type, bfd_size_type); |
43cd72b9 | 66 | static xtensa_opcode insn_decode_opcode |
7fa3d080 | 67 | (bfd_byte *, bfd_size_type, bfd_size_type, int); |
43cd72b9 | 68 | static bfd_boolean check_branch_target_aligned |
7fa3d080 | 69 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
43cd72b9 | 70 | static bfd_boolean check_loop_aligned |
7fa3d080 BW |
71 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
72 | static bfd_boolean check_branch_target_aligned_address (bfd_vma, int); | |
43cd72b9 | 73 | static bfd_size_type get_asm_simplify_size |
7fa3d080 | 74 | (bfd_byte *, bfd_size_type, bfd_size_type); |
e0001a05 NC |
75 | |
76 | /* Functions for link-time code simplifications. */ | |
77 | ||
43cd72b9 | 78 | static bfd_reloc_status_type elf_xtensa_do_asm_simplify |
7fa3d080 | 79 | (bfd_byte *, bfd_vma, bfd_vma, char **); |
e0001a05 | 80 | static bfd_reloc_status_type contract_asm_expansion |
7fa3d080 BW |
81 | (bfd_byte *, bfd_vma, Elf_Internal_Rela *, char **); |
82 | static xtensa_opcode swap_callx_for_call_opcode (xtensa_opcode); | |
83 | static xtensa_opcode get_expanded_call_opcode (bfd_byte *, int, bfd_boolean *); | |
e0001a05 NC |
84 | |
85 | /* Access to internal relocations, section contents and symbols. */ | |
86 | ||
87 | static Elf_Internal_Rela *retrieve_internal_relocs | |
7fa3d080 BW |
88 | (bfd *, asection *, bfd_boolean); |
89 | static void pin_internal_relocs (asection *, Elf_Internal_Rela *); | |
90 | static void release_internal_relocs (asection *, Elf_Internal_Rela *); | |
91 | static bfd_byte *retrieve_contents (bfd *, asection *, bfd_boolean); | |
92 | static void pin_contents (asection *, bfd_byte *); | |
93 | static void release_contents (asection *, bfd_byte *); | |
94 | static Elf_Internal_Sym *retrieve_local_syms (bfd *); | |
e0001a05 NC |
95 | |
96 | /* Miscellaneous utility functions. */ | |
97 | ||
f0e6fdb2 BW |
98 | static asection *elf_xtensa_get_plt_section (struct bfd_link_info *, int); |
99 | static asection *elf_xtensa_get_gotplt_section (struct bfd_link_info *, int); | |
7fa3d080 | 100 | static asection *get_elf_r_symndx_section (bfd *, unsigned long); |
e0001a05 | 101 | static struct elf_link_hash_entry *get_elf_r_symndx_hash_entry |
7fa3d080 BW |
102 | (bfd *, unsigned long); |
103 | static bfd_vma get_elf_r_symndx_offset (bfd *, unsigned long); | |
104 | static bfd_boolean is_reloc_sym_weak (bfd *, Elf_Internal_Rela *); | |
105 | static bfd_boolean pcrel_reloc_fits (xtensa_opcode, int, bfd_vma, bfd_vma); | |
106 | static bfd_boolean xtensa_is_property_section (asection *); | |
1d25768e | 107 | static bfd_boolean xtensa_is_insntable_section (asection *); |
7fa3d080 | 108 | static bfd_boolean xtensa_is_littable_section (asection *); |
1d25768e | 109 | static bfd_boolean xtensa_is_proptable_section (asection *); |
7fa3d080 BW |
110 | static int internal_reloc_compare (const void *, const void *); |
111 | static int internal_reloc_matches (const void *, const void *); | |
51c8ebc1 BW |
112 | static asection *xtensa_get_property_section (asection *, const char *); |
113 | extern asection *xtensa_make_property_section (asection *, const char *); | |
7fa3d080 | 114 | static flagword xtensa_get_property_predef_flags (asection *); |
e0001a05 NC |
115 | |
116 | /* Other functions called directly by the linker. */ | |
117 | ||
118 | typedef void (*deps_callback_t) | |
7fa3d080 | 119 | (asection *, bfd_vma, asection *, bfd_vma, void *); |
e0001a05 | 120 | extern bfd_boolean xtensa_callback_required_dependence |
7fa3d080 | 121 | (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *); |
e0001a05 NC |
122 | |
123 | ||
43cd72b9 BW |
124 | /* Globally visible flag for choosing size optimization of NOP removal |
125 | instead of branch-target-aware minimization for NOP removal. | |
126 | When nonzero, narrow all instructions and remove all NOPs possible | |
127 | around longcall expansions. */ | |
7fa3d080 | 128 | |
43cd72b9 BW |
129 | int elf32xtensa_size_opt; |
130 | ||
131 | ||
132 | /* The "new_section_hook" is used to set up a per-section | |
133 | "xtensa_relax_info" data structure with additional information used | |
134 | during relaxation. */ | |
e0001a05 | 135 | |
7fa3d080 | 136 | typedef struct xtensa_relax_info_struct xtensa_relax_info; |
e0001a05 | 137 | |
43cd72b9 | 138 | |
43cd72b9 BW |
139 | /* The GNU tools do not easily allow extending interfaces to pass around |
140 | the pointer to the Xtensa ISA information, so instead we add a global | |
141 | variable here (in BFD) that can be used by any of the tools that need | |
142 | this information. */ | |
143 | ||
144 | xtensa_isa xtensa_default_isa; | |
145 | ||
146 | ||
e0001a05 NC |
147 | /* When this is true, relocations may have been modified to refer to |
148 | symbols from other input files. The per-section list of "fix" | |
149 | records needs to be checked when resolving relocations. */ | |
150 | ||
151 | static bfd_boolean relaxing_section = FALSE; | |
152 | ||
43cd72b9 BW |
153 | /* When this is true, during final links, literals that cannot be |
154 | coalesced and their relocations may be moved to other sections. */ | |
155 | ||
156 | int elf32xtensa_no_literal_movement = 1; | |
157 | ||
e0001a05 NC |
158 | \f |
159 | static reloc_howto_type elf_howto_table[] = | |
160 | { | |
161 | HOWTO (R_XTENSA_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
162 | bfd_elf_xtensa_reloc, "R_XTENSA_NONE", | |
e5f131d1 | 163 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
164 | HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
165 | bfd_elf_xtensa_reloc, "R_XTENSA_32", | |
166 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
e5f131d1 | 167 | |
e0001a05 NC |
168 | /* Replace a 32-bit value with a value from the runtime linker (only |
169 | used by linker-generated stub functions). The r_addend value is | |
170 | special: 1 means to substitute a pointer to the runtime linker's | |
171 | dynamic resolver function; 2 means to substitute the link map for | |
172 | the shared object. */ | |
173 | HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
e5f131d1 BW |
174 | NULL, "R_XTENSA_RTLD", FALSE, 0, 0, FALSE), |
175 | ||
e0001a05 NC |
176 | HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
177 | bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT", | |
e5f131d1 | 178 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
179 | HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
180 | bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT", | |
e5f131d1 | 181 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
182 | HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
183 | bfd_elf_generic_reloc, "R_XTENSA_RELATIVE", | |
e5f131d1 | 184 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
185 | HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
186 | bfd_elf_xtensa_reloc, "R_XTENSA_PLT", | |
e5f131d1 BW |
187 | FALSE, 0, 0xffffffff, FALSE), |
188 | ||
e0001a05 | 189 | EMPTY_HOWTO (7), |
e5f131d1 BW |
190 | |
191 | /* Old relocations for backward compatibility. */ | |
e0001a05 | 192 | HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 193 | bfd_elf_xtensa_reloc, "R_XTENSA_OP0", FALSE, 0, 0, TRUE), |
e0001a05 | 194 | HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 195 | bfd_elf_xtensa_reloc, "R_XTENSA_OP1", FALSE, 0, 0, TRUE), |
e0001a05 | 196 | HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 BW |
197 | bfd_elf_xtensa_reloc, "R_XTENSA_OP2", FALSE, 0, 0, TRUE), |
198 | ||
e0001a05 NC |
199 | /* Assembly auto-expansion. */ |
200 | HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 201 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND", FALSE, 0, 0, TRUE), |
e0001a05 NC |
202 | /* Relax assembly auto-expansion. */ |
203 | HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 BW |
204 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY", FALSE, 0, 0, TRUE), |
205 | ||
e0001a05 | 206 | EMPTY_HOWTO (13), |
1bbb5f21 BW |
207 | |
208 | HOWTO (R_XTENSA_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
209 | bfd_elf_xtensa_reloc, "R_XTENSA_32_PCREL", | |
210 | FALSE, 0, 0xffffffff, TRUE), | |
e5f131d1 | 211 | |
e0001a05 NC |
212 | /* GNU extension to record C++ vtable hierarchy. */ |
213 | HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
214 | NULL, "R_XTENSA_GNU_VTINHERIT", | |
e5f131d1 | 215 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
216 | /* GNU extension to record C++ vtable member usage. */ |
217 | HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
218 | _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY", | |
e5f131d1 | 219 | FALSE, 0, 0, FALSE), |
43cd72b9 BW |
220 | |
221 | /* Relocations for supporting difference of symbols. */ | |
222 | HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
e5f131d1 | 223 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE), |
43cd72b9 | 224 | HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
e5f131d1 | 225 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE), |
43cd72b9 | 226 | HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
e5f131d1 | 227 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE), |
43cd72b9 BW |
228 | |
229 | /* General immediate operand relocations. */ | |
230 | HOWTO (R_XTENSA_SLOT0_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 231 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 232 | HOWTO (R_XTENSA_SLOT1_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 233 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 234 | HOWTO (R_XTENSA_SLOT2_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 235 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 236 | HOWTO (R_XTENSA_SLOT3_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 237 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 238 | HOWTO (R_XTENSA_SLOT4_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 239 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 240 | HOWTO (R_XTENSA_SLOT5_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 241 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 242 | HOWTO (R_XTENSA_SLOT6_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 243 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 244 | HOWTO (R_XTENSA_SLOT7_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 245 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 246 | HOWTO (R_XTENSA_SLOT8_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 247 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 248 | HOWTO (R_XTENSA_SLOT9_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 249 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 250 | HOWTO (R_XTENSA_SLOT10_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 251 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 252 | HOWTO (R_XTENSA_SLOT11_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 253 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 254 | HOWTO (R_XTENSA_SLOT12_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 255 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 256 | HOWTO (R_XTENSA_SLOT13_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 257 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 258 | HOWTO (R_XTENSA_SLOT14_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 259 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_OP", FALSE, 0, 0, TRUE), |
43cd72b9 BW |
260 | |
261 | /* "Alternate" relocations. The meaning of these is opcode-specific. */ | |
262 | HOWTO (R_XTENSA_SLOT0_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 263 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 264 | HOWTO (R_XTENSA_SLOT1_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 265 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 266 | HOWTO (R_XTENSA_SLOT2_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 267 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 268 | HOWTO (R_XTENSA_SLOT3_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 269 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 270 | HOWTO (R_XTENSA_SLOT4_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 271 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 272 | HOWTO (R_XTENSA_SLOT5_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 273 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 274 | HOWTO (R_XTENSA_SLOT6_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 275 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 276 | HOWTO (R_XTENSA_SLOT7_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 277 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 278 | HOWTO (R_XTENSA_SLOT8_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 279 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 280 | HOWTO (R_XTENSA_SLOT9_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 281 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 282 | HOWTO (R_XTENSA_SLOT10_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 283 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 284 | HOWTO (R_XTENSA_SLOT11_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 285 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 286 | HOWTO (R_XTENSA_SLOT12_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 287 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 288 | HOWTO (R_XTENSA_SLOT13_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 289 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 290 | HOWTO (R_XTENSA_SLOT14_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 291 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_ALT", FALSE, 0, 0, TRUE), |
28dbbc02 BW |
292 | |
293 | /* TLS relocations. */ | |
294 | HOWTO (R_XTENSA_TLSDESC_FN, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
295 | bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_FN", | |
296 | FALSE, 0, 0xffffffff, FALSE), | |
297 | HOWTO (R_XTENSA_TLSDESC_ARG, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
298 | bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_ARG", | |
299 | FALSE, 0, 0xffffffff, FALSE), | |
300 | HOWTO (R_XTENSA_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
301 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_DTPOFF", | |
302 | FALSE, 0, 0xffffffff, FALSE), | |
303 | HOWTO (R_XTENSA_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
304 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_TPOFF", | |
305 | FALSE, 0, 0xffffffff, FALSE), | |
306 | HOWTO (R_XTENSA_TLS_FUNC, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
307 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_FUNC", | |
308 | FALSE, 0, 0, FALSE), | |
309 | HOWTO (R_XTENSA_TLS_ARG, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
310 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_ARG", | |
311 | FALSE, 0, 0, FALSE), | |
312 | HOWTO (R_XTENSA_TLS_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
313 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_CALL", | |
314 | FALSE, 0, 0, FALSE), | |
e0001a05 NC |
315 | }; |
316 | ||
43cd72b9 | 317 | #if DEBUG_GEN_RELOC |
e0001a05 NC |
318 | #define TRACE(str) \ |
319 | fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str) | |
320 | #else | |
321 | #define TRACE(str) | |
322 | #endif | |
323 | ||
324 | static reloc_howto_type * | |
7fa3d080 BW |
325 | elf_xtensa_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
326 | bfd_reloc_code_real_type code) | |
e0001a05 NC |
327 | { |
328 | switch (code) | |
329 | { | |
330 | case BFD_RELOC_NONE: | |
331 | TRACE ("BFD_RELOC_NONE"); | |
332 | return &elf_howto_table[(unsigned) R_XTENSA_NONE ]; | |
333 | ||
334 | case BFD_RELOC_32: | |
335 | TRACE ("BFD_RELOC_32"); | |
336 | return &elf_howto_table[(unsigned) R_XTENSA_32 ]; | |
337 | ||
1bbb5f21 BW |
338 | case BFD_RELOC_32_PCREL: |
339 | TRACE ("BFD_RELOC_32_PCREL"); | |
340 | return &elf_howto_table[(unsigned) R_XTENSA_32_PCREL ]; | |
341 | ||
43cd72b9 BW |
342 | case BFD_RELOC_XTENSA_DIFF8: |
343 | TRACE ("BFD_RELOC_XTENSA_DIFF8"); | |
344 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF8 ]; | |
345 | ||
346 | case BFD_RELOC_XTENSA_DIFF16: | |
347 | TRACE ("BFD_RELOC_XTENSA_DIFF16"); | |
348 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF16 ]; | |
349 | ||
350 | case BFD_RELOC_XTENSA_DIFF32: | |
351 | TRACE ("BFD_RELOC_XTENSA_DIFF32"); | |
352 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF32 ]; | |
353 | ||
e0001a05 NC |
354 | case BFD_RELOC_XTENSA_RTLD: |
355 | TRACE ("BFD_RELOC_XTENSA_RTLD"); | |
356 | return &elf_howto_table[(unsigned) R_XTENSA_RTLD ]; | |
357 | ||
358 | case BFD_RELOC_XTENSA_GLOB_DAT: | |
359 | TRACE ("BFD_RELOC_XTENSA_GLOB_DAT"); | |
360 | return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ]; | |
361 | ||
362 | case BFD_RELOC_XTENSA_JMP_SLOT: | |
363 | TRACE ("BFD_RELOC_XTENSA_JMP_SLOT"); | |
364 | return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ]; | |
365 | ||
366 | case BFD_RELOC_XTENSA_RELATIVE: | |
367 | TRACE ("BFD_RELOC_XTENSA_RELATIVE"); | |
368 | return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ]; | |
369 | ||
370 | case BFD_RELOC_XTENSA_PLT: | |
371 | TRACE ("BFD_RELOC_XTENSA_PLT"); | |
372 | return &elf_howto_table[(unsigned) R_XTENSA_PLT ]; | |
373 | ||
374 | case BFD_RELOC_XTENSA_OP0: | |
375 | TRACE ("BFD_RELOC_XTENSA_OP0"); | |
376 | return &elf_howto_table[(unsigned) R_XTENSA_OP0 ]; | |
377 | ||
378 | case BFD_RELOC_XTENSA_OP1: | |
379 | TRACE ("BFD_RELOC_XTENSA_OP1"); | |
380 | return &elf_howto_table[(unsigned) R_XTENSA_OP1 ]; | |
381 | ||
382 | case BFD_RELOC_XTENSA_OP2: | |
383 | TRACE ("BFD_RELOC_XTENSA_OP2"); | |
384 | return &elf_howto_table[(unsigned) R_XTENSA_OP2 ]; | |
385 | ||
386 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
387 | TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND"); | |
388 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ]; | |
389 | ||
390 | case BFD_RELOC_XTENSA_ASM_SIMPLIFY: | |
391 | TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY"); | |
392 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ]; | |
393 | ||
394 | case BFD_RELOC_VTABLE_INHERIT: | |
395 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
396 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ]; | |
397 | ||
398 | case BFD_RELOC_VTABLE_ENTRY: | |
399 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
400 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ]; | |
401 | ||
28dbbc02 BW |
402 | case BFD_RELOC_XTENSA_TLSDESC_FN: |
403 | TRACE ("BFD_RELOC_XTENSA_TLSDESC_FN"); | |
404 | return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_FN ]; | |
405 | ||
406 | case BFD_RELOC_XTENSA_TLSDESC_ARG: | |
407 | TRACE ("BFD_RELOC_XTENSA_TLSDESC_ARG"); | |
408 | return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_ARG ]; | |
409 | ||
410 | case BFD_RELOC_XTENSA_TLS_DTPOFF: | |
411 | TRACE ("BFD_RELOC_XTENSA_TLS_DTPOFF"); | |
412 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_DTPOFF ]; | |
413 | ||
414 | case BFD_RELOC_XTENSA_TLS_TPOFF: | |
415 | TRACE ("BFD_RELOC_XTENSA_TLS_TPOFF"); | |
416 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_TPOFF ]; | |
417 | ||
418 | case BFD_RELOC_XTENSA_TLS_FUNC: | |
419 | TRACE ("BFD_RELOC_XTENSA_TLS_FUNC"); | |
420 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_FUNC ]; | |
421 | ||
422 | case BFD_RELOC_XTENSA_TLS_ARG: | |
423 | TRACE ("BFD_RELOC_XTENSA_TLS_ARG"); | |
424 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_ARG ]; | |
425 | ||
426 | case BFD_RELOC_XTENSA_TLS_CALL: | |
427 | TRACE ("BFD_RELOC_XTENSA_TLS_CALL"); | |
428 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_CALL ]; | |
429 | ||
e0001a05 | 430 | default: |
43cd72b9 BW |
431 | if (code >= BFD_RELOC_XTENSA_SLOT0_OP |
432 | && code <= BFD_RELOC_XTENSA_SLOT14_OP) | |
433 | { | |
434 | unsigned n = (R_XTENSA_SLOT0_OP + | |
435 | (code - BFD_RELOC_XTENSA_SLOT0_OP)); | |
436 | return &elf_howto_table[n]; | |
437 | } | |
438 | ||
439 | if (code >= BFD_RELOC_XTENSA_SLOT0_ALT | |
440 | && code <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
441 | { | |
442 | unsigned n = (R_XTENSA_SLOT0_ALT + | |
443 | (code - BFD_RELOC_XTENSA_SLOT0_ALT)); | |
444 | return &elf_howto_table[n]; | |
445 | } | |
446 | ||
e0001a05 NC |
447 | break; |
448 | } | |
449 | ||
450 | TRACE ("Unknown"); | |
451 | return NULL; | |
452 | } | |
453 | ||
157090f7 AM |
454 | static reloc_howto_type * |
455 | elf_xtensa_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
456 | const char *r_name) | |
457 | { | |
458 | unsigned int i; | |
459 | ||
460 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
461 | if (elf_howto_table[i].name != NULL | |
462 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
463 | return &elf_howto_table[i]; | |
464 | ||
465 | return NULL; | |
466 | } | |
467 | ||
e0001a05 NC |
468 | |
469 | /* Given an ELF "rela" relocation, find the corresponding howto and record | |
470 | it in the BFD internal arelent representation of the relocation. */ | |
471 | ||
472 | static void | |
7fa3d080 BW |
473 | elf_xtensa_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
474 | arelent *cache_ptr, | |
475 | Elf_Internal_Rela *dst) | |
e0001a05 NC |
476 | { |
477 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
478 | ||
479 | BFD_ASSERT (r_type < (unsigned int) R_XTENSA_max); | |
480 | cache_ptr->howto = &elf_howto_table[r_type]; | |
481 | } | |
482 | ||
483 | \f | |
484 | /* Functions for the Xtensa ELF linker. */ | |
485 | ||
486 | /* The name of the dynamic interpreter. This is put in the .interp | |
487 | section. */ | |
488 | ||
489 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so" | |
490 | ||
491 | /* The size in bytes of an entry in the procedure linkage table. | |
492 | (This does _not_ include the space for the literals associated with | |
493 | the PLT entry.) */ | |
494 | ||
495 | #define PLT_ENTRY_SIZE 16 | |
496 | ||
497 | /* For _really_ large PLTs, we may need to alternate between literals | |
498 | and code to keep the literals within the 256K range of the L32R | |
499 | instructions in the code. It's unlikely that anyone would ever need | |
500 | such a big PLT, but an arbitrary limit on the PLT size would be bad. | |
501 | Thus, we split the PLT into chunks. Since there's very little | |
502 | overhead (2 extra literals) for each chunk, the chunk size is kept | |
503 | small so that the code for handling multiple chunks get used and | |
504 | tested regularly. With 254 entries, there are 1K of literals for | |
505 | each chunk, and that seems like a nice round number. */ | |
506 | ||
507 | #define PLT_ENTRIES_PER_CHUNK 254 | |
508 | ||
509 | /* PLT entries are actually used as stub functions for lazy symbol | |
510 | resolution. Once the symbol is resolved, the stub function is never | |
511 | invoked. Note: the 32-byte frame size used here cannot be changed | |
512 | without a corresponding change in the runtime linker. */ | |
513 | ||
514 | static const bfd_byte elf_xtensa_be_plt_entry[PLT_ENTRY_SIZE] = | |
515 | { | |
516 | 0x6c, 0x10, 0x04, /* entry sp, 32 */ | |
517 | 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
518 | 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
519 | 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
520 | 0x0a, 0x80, 0x00, /* jx a8 */ | |
521 | 0 /* unused */ | |
522 | }; | |
523 | ||
524 | static const bfd_byte elf_xtensa_le_plt_entry[PLT_ENTRY_SIZE] = | |
525 | { | |
526 | 0x36, 0x41, 0x00, /* entry sp, 32 */ | |
527 | 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
528 | 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
529 | 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
530 | 0xa0, 0x08, 0x00, /* jx a8 */ | |
531 | 0 /* unused */ | |
532 | }; | |
533 | ||
28dbbc02 BW |
534 | /* The size of the thread control block. */ |
535 | #define TCB_SIZE 8 | |
536 | ||
537 | struct elf_xtensa_link_hash_entry | |
538 | { | |
539 | struct elf_link_hash_entry elf; | |
540 | ||
541 | bfd_signed_vma tlsfunc_refcount; | |
542 | ||
543 | #define GOT_UNKNOWN 0 | |
544 | #define GOT_NORMAL 1 | |
545 | #define GOT_TLS_GD 2 /* global or local dynamic */ | |
546 | #define GOT_TLS_IE 4 /* initial or local exec */ | |
547 | #define GOT_TLS_ANY (GOT_TLS_GD | GOT_TLS_IE) | |
548 | unsigned char tls_type; | |
549 | }; | |
550 | ||
551 | #define elf_xtensa_hash_entry(ent) ((struct elf_xtensa_link_hash_entry *)(ent)) | |
552 | ||
553 | struct elf_xtensa_obj_tdata | |
554 | { | |
555 | struct elf_obj_tdata root; | |
556 | ||
557 | /* tls_type for each local got entry. */ | |
558 | char *local_got_tls_type; | |
559 | ||
560 | bfd_signed_vma *local_tlsfunc_refcounts; | |
561 | }; | |
562 | ||
563 | #define elf_xtensa_tdata(abfd) \ | |
564 | ((struct elf_xtensa_obj_tdata *) (abfd)->tdata.any) | |
565 | ||
566 | #define elf_xtensa_local_got_tls_type(abfd) \ | |
567 | (elf_xtensa_tdata (abfd)->local_got_tls_type) | |
568 | ||
569 | #define elf_xtensa_local_tlsfunc_refcounts(abfd) \ | |
570 | (elf_xtensa_tdata (abfd)->local_tlsfunc_refcounts) | |
571 | ||
572 | #define is_xtensa_elf(bfd) \ | |
573 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
574 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 575 | && elf_object_id (bfd) == XTENSA_ELF_DATA) |
28dbbc02 BW |
576 | |
577 | static bfd_boolean | |
578 | elf_xtensa_mkobject (bfd *abfd) | |
579 | { | |
580 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_xtensa_obj_tdata), | |
4dfe6ac6 | 581 | XTENSA_ELF_DATA); |
28dbbc02 BW |
582 | } |
583 | ||
f0e6fdb2 BW |
584 | /* Xtensa ELF linker hash table. */ |
585 | ||
586 | struct elf_xtensa_link_hash_table | |
587 | { | |
588 | struct elf_link_hash_table elf; | |
589 | ||
590 | /* Short-cuts to get to dynamic linker sections. */ | |
591 | asection *sgot; | |
592 | asection *sgotplt; | |
593 | asection *srelgot; | |
594 | asection *splt; | |
595 | asection *srelplt; | |
596 | asection *sgotloc; | |
597 | asection *spltlittbl; | |
598 | ||
599 | /* Total count of PLT relocations seen during check_relocs. | |
600 | The actual PLT code must be split into multiple sections and all | |
601 | the sections have to be created before size_dynamic_sections, | |
602 | where we figure out the exact number of PLT entries that will be | |
603 | needed. It is OK if this count is an overestimate, e.g., some | |
604 | relocations may be removed by GC. */ | |
605 | int plt_reloc_count; | |
28dbbc02 BW |
606 | |
607 | struct elf_xtensa_link_hash_entry *tlsbase; | |
f0e6fdb2 BW |
608 | }; |
609 | ||
610 | /* Get the Xtensa ELF linker hash table from a link_info structure. */ | |
611 | ||
612 | #define elf_xtensa_hash_table(p) \ | |
4dfe6ac6 NC |
613 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
614 | == XTENSA_ELF_DATA ? ((struct elf_xtensa_link_hash_table *) ((p)->hash)) : NULL) | |
f0e6fdb2 | 615 | |
28dbbc02 BW |
616 | /* Create an entry in an Xtensa ELF linker hash table. */ |
617 | ||
618 | static struct bfd_hash_entry * | |
619 | elf_xtensa_link_hash_newfunc (struct bfd_hash_entry *entry, | |
620 | struct bfd_hash_table *table, | |
621 | const char *string) | |
622 | { | |
623 | /* Allocate the structure if it has not already been allocated by a | |
624 | subclass. */ | |
625 | if (entry == NULL) | |
626 | { | |
627 | entry = bfd_hash_allocate (table, | |
628 | sizeof (struct elf_xtensa_link_hash_entry)); | |
629 | if (entry == NULL) | |
630 | return entry; | |
631 | } | |
632 | ||
633 | /* Call the allocation method of the superclass. */ | |
634 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
635 | if (entry != NULL) | |
636 | { | |
637 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (entry); | |
638 | eh->tlsfunc_refcount = 0; | |
639 | eh->tls_type = GOT_UNKNOWN; | |
640 | } | |
641 | ||
642 | return entry; | |
643 | } | |
644 | ||
f0e6fdb2 BW |
645 | /* Create an Xtensa ELF linker hash table. */ |
646 | ||
647 | static struct bfd_link_hash_table * | |
648 | elf_xtensa_link_hash_table_create (bfd *abfd) | |
649 | { | |
28dbbc02 | 650 | struct elf_link_hash_entry *tlsbase; |
f0e6fdb2 BW |
651 | struct elf_xtensa_link_hash_table *ret; |
652 | bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table); | |
653 | ||
654 | ret = bfd_malloc (amt); | |
655 | if (ret == NULL) | |
656 | return NULL; | |
657 | ||
658 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
28dbbc02 | 659 | elf_xtensa_link_hash_newfunc, |
4dfe6ac6 NC |
660 | sizeof (struct elf_xtensa_link_hash_entry), |
661 | XTENSA_ELF_DATA)) | |
f0e6fdb2 BW |
662 | { |
663 | free (ret); | |
664 | return NULL; | |
665 | } | |
666 | ||
667 | ret->sgot = NULL; | |
668 | ret->sgotplt = NULL; | |
669 | ret->srelgot = NULL; | |
670 | ret->splt = NULL; | |
671 | ret->srelplt = NULL; | |
672 | ret->sgotloc = NULL; | |
673 | ret->spltlittbl = NULL; | |
674 | ||
675 | ret->plt_reloc_count = 0; | |
676 | ||
28dbbc02 BW |
677 | /* Create a hash entry for "_TLS_MODULE_BASE_" to speed up checking |
678 | for it later. */ | |
679 | tlsbase = elf_link_hash_lookup (&ret->elf, "_TLS_MODULE_BASE_", | |
680 | TRUE, FALSE, FALSE); | |
681 | tlsbase->root.type = bfd_link_hash_new; | |
682 | tlsbase->root.u.undef.abfd = NULL; | |
683 | tlsbase->non_elf = 0; | |
684 | ret->tlsbase = elf_xtensa_hash_entry (tlsbase); | |
685 | ret->tlsbase->tls_type = GOT_UNKNOWN; | |
686 | ||
f0e6fdb2 BW |
687 | return &ret->elf.root; |
688 | } | |
571b5725 | 689 | |
28dbbc02 BW |
690 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
691 | ||
692 | static void | |
693 | elf_xtensa_copy_indirect_symbol (struct bfd_link_info *info, | |
694 | struct elf_link_hash_entry *dir, | |
695 | struct elf_link_hash_entry *ind) | |
696 | { | |
697 | struct elf_xtensa_link_hash_entry *edir, *eind; | |
698 | ||
699 | edir = elf_xtensa_hash_entry (dir); | |
700 | eind = elf_xtensa_hash_entry (ind); | |
701 | ||
702 | if (ind->root.type == bfd_link_hash_indirect) | |
703 | { | |
704 | edir->tlsfunc_refcount += eind->tlsfunc_refcount; | |
705 | eind->tlsfunc_refcount = 0; | |
706 | ||
707 | if (dir->got.refcount <= 0) | |
708 | { | |
709 | edir->tls_type = eind->tls_type; | |
710 | eind->tls_type = GOT_UNKNOWN; | |
711 | } | |
712 | } | |
713 | ||
714 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
715 | } | |
716 | ||
571b5725 | 717 | static inline bfd_boolean |
4608f3d9 | 718 | elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h, |
7fa3d080 | 719 | struct bfd_link_info *info) |
571b5725 BW |
720 | { |
721 | /* Check if we should do dynamic things to this symbol. The | |
722 | "ignore_protected" argument need not be set, because Xtensa code | |
723 | does not require special handling of STV_PROTECTED to make function | |
724 | pointer comparisons work properly. The PLT addresses are never | |
725 | used for function pointers. */ | |
726 | ||
727 | return _bfd_elf_dynamic_symbol_p (h, info, 0); | |
728 | } | |
729 | ||
e0001a05 NC |
730 | \f |
731 | static int | |
7fa3d080 | 732 | property_table_compare (const void *ap, const void *bp) |
e0001a05 NC |
733 | { |
734 | const property_table_entry *a = (const property_table_entry *) ap; | |
735 | const property_table_entry *b = (const property_table_entry *) bp; | |
736 | ||
43cd72b9 BW |
737 | if (a->address == b->address) |
738 | { | |
43cd72b9 BW |
739 | if (a->size != b->size) |
740 | return (a->size - b->size); | |
741 | ||
742 | if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN)) | |
743 | return ((b->flags & XTENSA_PROP_ALIGN) | |
744 | - (a->flags & XTENSA_PROP_ALIGN)); | |
745 | ||
746 | if ((a->flags & XTENSA_PROP_ALIGN) | |
747 | && (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
748 | != GET_XTENSA_PROP_ALIGNMENT (b->flags))) | |
749 | return (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
750 | - GET_XTENSA_PROP_ALIGNMENT (b->flags)); | |
751 | ||
752 | if ((a->flags & XTENSA_PROP_UNREACHABLE) | |
753 | != (b->flags & XTENSA_PROP_UNREACHABLE)) | |
754 | return ((b->flags & XTENSA_PROP_UNREACHABLE) | |
755 | - (a->flags & XTENSA_PROP_UNREACHABLE)); | |
756 | ||
757 | return (a->flags - b->flags); | |
758 | } | |
759 | ||
760 | return (a->address - b->address); | |
761 | } | |
762 | ||
763 | ||
764 | static int | |
7fa3d080 | 765 | property_table_matches (const void *ap, const void *bp) |
43cd72b9 BW |
766 | { |
767 | const property_table_entry *a = (const property_table_entry *) ap; | |
768 | const property_table_entry *b = (const property_table_entry *) bp; | |
769 | ||
770 | /* Check if one entry overlaps with the other. */ | |
e0001a05 NC |
771 | if ((b->address >= a->address && b->address < (a->address + a->size)) |
772 | || (a->address >= b->address && a->address < (b->address + b->size))) | |
773 | return 0; | |
774 | ||
775 | return (a->address - b->address); | |
776 | } | |
777 | ||
778 | ||
43cd72b9 BW |
779 | /* Get the literal table or property table entries for the given |
780 | section. Sets TABLE_P and returns the number of entries. On | |
781 | error, returns a negative value. */ | |
e0001a05 | 782 | |
7fa3d080 BW |
783 | static int |
784 | xtensa_read_table_entries (bfd *abfd, | |
785 | asection *section, | |
786 | property_table_entry **table_p, | |
787 | const char *sec_name, | |
788 | bfd_boolean output_addr) | |
e0001a05 NC |
789 | { |
790 | asection *table_section; | |
e0001a05 NC |
791 | bfd_size_type table_size = 0; |
792 | bfd_byte *table_data; | |
793 | property_table_entry *blocks; | |
e4115460 | 794 | int blk, block_count; |
e0001a05 | 795 | bfd_size_type num_records; |
bcc2cc8e BW |
796 | Elf_Internal_Rela *internal_relocs, *irel, *rel_end; |
797 | bfd_vma section_addr, off; | |
43cd72b9 | 798 | flagword predef_flags; |
bcc2cc8e | 799 | bfd_size_type table_entry_size, section_limit; |
43cd72b9 BW |
800 | |
801 | if (!section | |
802 | || !(section->flags & SEC_ALLOC) | |
803 | || (section->flags & SEC_DEBUGGING)) | |
804 | { | |
805 | *table_p = NULL; | |
806 | return 0; | |
807 | } | |
e0001a05 | 808 | |
74869ac7 | 809 | table_section = xtensa_get_property_section (section, sec_name); |
43cd72b9 | 810 | if (table_section) |
eea6121a | 811 | table_size = table_section->size; |
43cd72b9 | 812 | |
e0001a05 NC |
813 | if (table_size == 0) |
814 | { | |
815 | *table_p = NULL; | |
816 | return 0; | |
817 | } | |
818 | ||
43cd72b9 BW |
819 | predef_flags = xtensa_get_property_predef_flags (table_section); |
820 | table_entry_size = 12; | |
821 | if (predef_flags) | |
822 | table_entry_size -= 4; | |
823 | ||
824 | num_records = table_size / table_entry_size; | |
e0001a05 NC |
825 | table_data = retrieve_contents (abfd, table_section, TRUE); |
826 | blocks = (property_table_entry *) | |
827 | bfd_malloc (num_records * sizeof (property_table_entry)); | |
828 | block_count = 0; | |
43cd72b9 BW |
829 | |
830 | if (output_addr) | |
831 | section_addr = section->output_section->vma + section->output_offset; | |
832 | else | |
833 | section_addr = section->vma; | |
3ba3bc8c | 834 | |
e0001a05 | 835 | internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE); |
3ba3bc8c | 836 | if (internal_relocs && !table_section->reloc_done) |
e0001a05 | 837 | { |
bcc2cc8e BW |
838 | qsort (internal_relocs, table_section->reloc_count, |
839 | sizeof (Elf_Internal_Rela), internal_reloc_compare); | |
840 | irel = internal_relocs; | |
841 | } | |
842 | else | |
843 | irel = NULL; | |
844 | ||
845 | section_limit = bfd_get_section_limit (abfd, section); | |
846 | rel_end = internal_relocs + table_section->reloc_count; | |
847 | ||
848 | for (off = 0; off < table_size; off += table_entry_size) | |
849 | { | |
850 | bfd_vma address = bfd_get_32 (abfd, table_data + off); | |
851 | ||
852 | /* Skip any relocations before the current offset. This should help | |
853 | avoid confusion caused by unexpected relocations for the preceding | |
854 | table entry. */ | |
855 | while (irel && | |
856 | (irel->r_offset < off | |
857 | || (irel->r_offset == off | |
858 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE))) | |
859 | { | |
860 | irel += 1; | |
861 | if (irel >= rel_end) | |
862 | irel = 0; | |
863 | } | |
e0001a05 | 864 | |
bcc2cc8e | 865 | if (irel && irel->r_offset == off) |
e0001a05 | 866 | { |
bcc2cc8e BW |
867 | bfd_vma sym_off; |
868 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); | |
869 | BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32); | |
e0001a05 | 870 | |
bcc2cc8e | 871 | if (get_elf_r_symndx_section (abfd, r_symndx) != section) |
e0001a05 NC |
872 | continue; |
873 | ||
bcc2cc8e BW |
874 | sym_off = get_elf_r_symndx_offset (abfd, r_symndx); |
875 | BFD_ASSERT (sym_off == 0); | |
876 | address += (section_addr + sym_off + irel->r_addend); | |
e0001a05 | 877 | } |
bcc2cc8e | 878 | else |
e0001a05 | 879 | { |
bcc2cc8e BW |
880 | if (address < section_addr |
881 | || address >= section_addr + section_limit) | |
882 | continue; | |
e0001a05 | 883 | } |
bcc2cc8e BW |
884 | |
885 | blocks[block_count].address = address; | |
886 | blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4); | |
887 | if (predef_flags) | |
888 | blocks[block_count].flags = predef_flags; | |
889 | else | |
890 | blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8); | |
891 | block_count++; | |
e0001a05 NC |
892 | } |
893 | ||
894 | release_contents (table_section, table_data); | |
895 | release_internal_relocs (table_section, internal_relocs); | |
896 | ||
43cd72b9 | 897 | if (block_count > 0) |
e0001a05 NC |
898 | { |
899 | /* Now sort them into address order for easy reference. */ | |
900 | qsort (blocks, block_count, sizeof (property_table_entry), | |
901 | property_table_compare); | |
e4115460 BW |
902 | |
903 | /* Check that the table contents are valid. Problems may occur, | |
904 | for example, if an unrelocated object file is stripped. */ | |
905 | for (blk = 1; blk < block_count; blk++) | |
906 | { | |
907 | /* The only circumstance where two entries may legitimately | |
908 | have the same address is when one of them is a zero-size | |
909 | placeholder to mark a place where fill can be inserted. | |
910 | The zero-size entry should come first. */ | |
911 | if (blocks[blk - 1].address == blocks[blk].address && | |
912 | blocks[blk - 1].size != 0) | |
913 | { | |
914 | (*_bfd_error_handler) (_("%B(%A): invalid property table"), | |
915 | abfd, section); | |
916 | bfd_set_error (bfd_error_bad_value); | |
917 | free (blocks); | |
918 | return -1; | |
919 | } | |
920 | } | |
e0001a05 | 921 | } |
43cd72b9 | 922 | |
e0001a05 NC |
923 | *table_p = blocks; |
924 | return block_count; | |
925 | } | |
926 | ||
927 | ||
7fa3d080 BW |
928 | static property_table_entry * |
929 | elf_xtensa_find_property_entry (property_table_entry *property_table, | |
930 | int property_table_size, | |
931 | bfd_vma addr) | |
e0001a05 NC |
932 | { |
933 | property_table_entry entry; | |
43cd72b9 | 934 | property_table_entry *rv; |
e0001a05 | 935 | |
43cd72b9 BW |
936 | if (property_table_size == 0) |
937 | return NULL; | |
e0001a05 NC |
938 | |
939 | entry.address = addr; | |
940 | entry.size = 1; | |
43cd72b9 | 941 | entry.flags = 0; |
e0001a05 | 942 | |
43cd72b9 BW |
943 | rv = bsearch (&entry, property_table, property_table_size, |
944 | sizeof (property_table_entry), property_table_matches); | |
945 | return rv; | |
946 | } | |
947 | ||
948 | ||
949 | static bfd_boolean | |
7fa3d080 BW |
950 | elf_xtensa_in_literal_pool (property_table_entry *lit_table, |
951 | int lit_table_size, | |
952 | bfd_vma addr) | |
43cd72b9 BW |
953 | { |
954 | if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr)) | |
e0001a05 NC |
955 | return TRUE; |
956 | ||
957 | return FALSE; | |
958 | } | |
959 | ||
960 | \f | |
961 | /* Look through the relocs for a section during the first phase, and | |
962 | calculate needed space in the dynamic reloc sections. */ | |
963 | ||
964 | static bfd_boolean | |
7fa3d080 BW |
965 | elf_xtensa_check_relocs (bfd *abfd, |
966 | struct bfd_link_info *info, | |
967 | asection *sec, | |
968 | const Elf_Internal_Rela *relocs) | |
e0001a05 | 969 | { |
f0e6fdb2 | 970 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
971 | Elf_Internal_Shdr *symtab_hdr; |
972 | struct elf_link_hash_entry **sym_hashes; | |
973 | const Elf_Internal_Rela *rel; | |
974 | const Elf_Internal_Rela *rel_end; | |
e0001a05 | 975 | |
28dbbc02 | 976 | if (info->relocatable || (sec->flags & SEC_ALLOC) == 0) |
e0001a05 NC |
977 | return TRUE; |
978 | ||
28dbbc02 BW |
979 | BFD_ASSERT (is_xtensa_elf (abfd)); |
980 | ||
f0e6fdb2 | 981 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
982 | if (htab == NULL) |
983 | return FALSE; | |
984 | ||
e0001a05 NC |
985 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
986 | sym_hashes = elf_sym_hashes (abfd); | |
987 | ||
e0001a05 NC |
988 | rel_end = relocs + sec->reloc_count; |
989 | for (rel = relocs; rel < rel_end; rel++) | |
990 | { | |
991 | unsigned int r_type; | |
992 | unsigned long r_symndx; | |
28dbbc02 BW |
993 | struct elf_link_hash_entry *h = NULL; |
994 | struct elf_xtensa_link_hash_entry *eh; | |
995 | int tls_type, old_tls_type; | |
996 | bfd_boolean is_got = FALSE; | |
997 | bfd_boolean is_plt = FALSE; | |
998 | bfd_boolean is_tlsfunc = FALSE; | |
e0001a05 NC |
999 | |
1000 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1001 | r_type = ELF32_R_TYPE (rel->r_info); | |
1002 | ||
1003 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1004 | { | |
d003868e AM |
1005 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1006 | abfd, r_symndx); | |
e0001a05 NC |
1007 | return FALSE; |
1008 | } | |
1009 | ||
28dbbc02 | 1010 | if (r_symndx >= symtab_hdr->sh_info) |
e0001a05 NC |
1011 | { |
1012 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1013 | while (h->root.type == bfd_link_hash_indirect | |
1014 | || h->root.type == bfd_link_hash_warning) | |
1015 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1016 | } | |
28dbbc02 | 1017 | eh = elf_xtensa_hash_entry (h); |
e0001a05 NC |
1018 | |
1019 | switch (r_type) | |
1020 | { | |
28dbbc02 BW |
1021 | case R_XTENSA_TLSDESC_FN: |
1022 | if (info->shared) | |
1023 | { | |
1024 | tls_type = GOT_TLS_GD; | |
1025 | is_got = TRUE; | |
1026 | is_tlsfunc = TRUE; | |
1027 | } | |
1028 | else | |
1029 | tls_type = GOT_TLS_IE; | |
1030 | break; | |
e0001a05 | 1031 | |
28dbbc02 BW |
1032 | case R_XTENSA_TLSDESC_ARG: |
1033 | if (info->shared) | |
e0001a05 | 1034 | { |
28dbbc02 BW |
1035 | tls_type = GOT_TLS_GD; |
1036 | is_got = TRUE; | |
1037 | } | |
1038 | else | |
1039 | { | |
1040 | tls_type = GOT_TLS_IE; | |
1041 | if (h && elf_xtensa_hash_entry (h) != htab->tlsbase) | |
1042 | is_got = TRUE; | |
e0001a05 NC |
1043 | } |
1044 | break; | |
1045 | ||
28dbbc02 BW |
1046 | case R_XTENSA_TLS_DTPOFF: |
1047 | if (info->shared) | |
1048 | tls_type = GOT_TLS_GD; | |
1049 | else | |
1050 | tls_type = GOT_TLS_IE; | |
1051 | break; | |
1052 | ||
1053 | case R_XTENSA_TLS_TPOFF: | |
1054 | tls_type = GOT_TLS_IE; | |
1055 | if (info->shared) | |
1056 | info->flags |= DF_STATIC_TLS; | |
1057 | if (info->shared || h) | |
1058 | is_got = TRUE; | |
1059 | break; | |
1060 | ||
1061 | case R_XTENSA_32: | |
1062 | tls_type = GOT_NORMAL; | |
1063 | is_got = TRUE; | |
1064 | break; | |
1065 | ||
e0001a05 | 1066 | case R_XTENSA_PLT: |
28dbbc02 BW |
1067 | tls_type = GOT_NORMAL; |
1068 | is_plt = TRUE; | |
1069 | break; | |
e0001a05 | 1070 | |
28dbbc02 BW |
1071 | case R_XTENSA_GNU_VTINHERIT: |
1072 | /* This relocation describes the C++ object vtable hierarchy. | |
1073 | Reconstruct it for later use during GC. */ | |
1074 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1075 | return FALSE; | |
1076 | continue; | |
1077 | ||
1078 | case R_XTENSA_GNU_VTENTRY: | |
1079 | /* This relocation describes which C++ vtable entries are actually | |
1080 | used. Record for later use during GC. */ | |
1081 | BFD_ASSERT (h != NULL); | |
1082 | if (h != NULL | |
1083 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1084 | return FALSE; | |
1085 | continue; | |
1086 | ||
1087 | default: | |
1088 | /* Nothing to do for any other relocations. */ | |
1089 | continue; | |
1090 | } | |
1091 | ||
1092 | if (h) | |
1093 | { | |
1094 | if (is_plt) | |
e0001a05 | 1095 | { |
b45329f9 BW |
1096 | if (h->plt.refcount <= 0) |
1097 | { | |
1098 | h->needs_plt = 1; | |
1099 | h->plt.refcount = 1; | |
1100 | } | |
1101 | else | |
1102 | h->plt.refcount += 1; | |
e0001a05 NC |
1103 | |
1104 | /* Keep track of the total PLT relocation count even if we | |
1105 | don't yet know whether the dynamic sections will be | |
1106 | created. */ | |
f0e6fdb2 | 1107 | htab->plt_reloc_count += 1; |
e0001a05 NC |
1108 | |
1109 | if (elf_hash_table (info)->dynamic_sections_created) | |
1110 | { | |
f0e6fdb2 | 1111 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1112 | return FALSE; |
1113 | } | |
1114 | } | |
28dbbc02 | 1115 | else if (is_got) |
b45329f9 BW |
1116 | { |
1117 | if (h->got.refcount <= 0) | |
1118 | h->got.refcount = 1; | |
1119 | else | |
1120 | h->got.refcount += 1; | |
1121 | } | |
28dbbc02 BW |
1122 | |
1123 | if (is_tlsfunc) | |
1124 | eh->tlsfunc_refcount += 1; | |
e0001a05 | 1125 | |
28dbbc02 BW |
1126 | old_tls_type = eh->tls_type; |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | /* Allocate storage the first time. */ | |
1131 | if (elf_local_got_refcounts (abfd) == NULL) | |
e0001a05 | 1132 | { |
28dbbc02 BW |
1133 | bfd_size_type size = symtab_hdr->sh_info; |
1134 | void *mem; | |
e0001a05 | 1135 | |
28dbbc02 BW |
1136 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); |
1137 | if (mem == NULL) | |
1138 | return FALSE; | |
1139 | elf_local_got_refcounts (abfd) = (bfd_signed_vma *) mem; | |
e0001a05 | 1140 | |
28dbbc02 BW |
1141 | mem = bfd_zalloc (abfd, size); |
1142 | if (mem == NULL) | |
1143 | return FALSE; | |
1144 | elf_xtensa_local_got_tls_type (abfd) = (char *) mem; | |
1145 | ||
1146 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); | |
1147 | if (mem == NULL) | |
1148 | return FALSE; | |
1149 | elf_xtensa_local_tlsfunc_refcounts (abfd) | |
1150 | = (bfd_signed_vma *) mem; | |
e0001a05 | 1151 | } |
e0001a05 | 1152 | |
28dbbc02 BW |
1153 | /* This is a global offset table entry for a local symbol. */ |
1154 | if (is_got || is_plt) | |
1155 | elf_local_got_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1156 | |
28dbbc02 BW |
1157 | if (is_tlsfunc) |
1158 | elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1159 | |
28dbbc02 BW |
1160 | old_tls_type = elf_xtensa_local_got_tls_type (abfd) [r_symndx]; |
1161 | } | |
1162 | ||
1163 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) | |
1164 | tls_type |= old_tls_type; | |
1165 | /* If a TLS symbol is accessed using IE at least once, | |
1166 | there is no point to use a dynamic model for it. */ | |
1167 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
1168 | && ((old_tls_type & GOT_TLS_GD) == 0 | |
1169 | || (tls_type & GOT_TLS_IE) == 0)) | |
1170 | { | |
1171 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GD)) | |
1172 | tls_type = old_tls_type; | |
1173 | else if ((old_tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GD)) | |
1174 | tls_type |= old_tls_type; | |
1175 | else | |
1176 | { | |
1177 | (*_bfd_error_handler) | |
1178 | (_("%B: `%s' accessed both as normal and thread local symbol"), | |
1179 | abfd, | |
1180 | h ? h->root.root.string : "<local>"); | |
1181 | return FALSE; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | if (old_tls_type != tls_type) | |
1186 | { | |
1187 | if (eh) | |
1188 | eh->tls_type = tls_type; | |
1189 | else | |
1190 | elf_xtensa_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
e0001a05 NC |
1191 | } |
1192 | } | |
1193 | ||
e0001a05 NC |
1194 | return TRUE; |
1195 | } | |
1196 | ||
1197 | ||
95147441 BW |
1198 | static void |
1199 | elf_xtensa_make_sym_local (struct bfd_link_info *info, | |
1200 | struct elf_link_hash_entry *h) | |
1201 | { | |
1202 | if (info->shared) | |
1203 | { | |
1204 | if (h->plt.refcount > 0) | |
1205 | { | |
1206 | /* For shared objects, there's no need for PLT entries for local | |
1207 | symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */ | |
1208 | if (h->got.refcount < 0) | |
1209 | h->got.refcount = 0; | |
1210 | h->got.refcount += h->plt.refcount; | |
1211 | h->plt.refcount = 0; | |
1212 | } | |
1213 | } | |
1214 | else | |
1215 | { | |
1216 | /* Don't need any dynamic relocations at all. */ | |
1217 | h->plt.refcount = 0; | |
1218 | h->got.refcount = 0; | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | ||
1223 | static void | |
1224 | elf_xtensa_hide_symbol (struct bfd_link_info *info, | |
1225 | struct elf_link_hash_entry *h, | |
1226 | bfd_boolean force_local) | |
1227 | { | |
1228 | /* For a shared link, move the plt refcount to the got refcount to leave | |
1229 | space for RELATIVE relocs. */ | |
1230 | elf_xtensa_make_sym_local (info, h); | |
1231 | ||
1232 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
1233 | } | |
1234 | ||
1235 | ||
e0001a05 NC |
1236 | /* Return the section that should be marked against GC for a given |
1237 | relocation. */ | |
1238 | ||
1239 | static asection * | |
7fa3d080 | 1240 | elf_xtensa_gc_mark_hook (asection *sec, |
07adf181 | 1241 | struct bfd_link_info *info, |
7fa3d080 BW |
1242 | Elf_Internal_Rela *rel, |
1243 | struct elf_link_hash_entry *h, | |
1244 | Elf_Internal_Sym *sym) | |
e0001a05 | 1245 | { |
e1e5c0b5 BW |
1246 | /* Property sections are marked "KEEP" in the linker scripts, but they |
1247 | should not cause other sections to be marked. (This approach relies | |
1248 | on elf_xtensa_discard_info to remove property table entries that | |
1249 | describe discarded sections. Alternatively, it might be more | |
1250 | efficient to avoid using "KEEP" in the linker scripts and instead use | |
1251 | the gc_mark_extra_sections hook to mark only the property sections | |
1252 | that describe marked sections. That alternative does not work well | |
1253 | with the current property table sections, which do not correspond | |
1254 | one-to-one with the sections they describe, but that should be fixed | |
1255 | someday.) */ | |
1256 | if (xtensa_is_property_section (sec)) | |
1257 | return NULL; | |
1258 | ||
07adf181 AM |
1259 | if (h != NULL) |
1260 | switch (ELF32_R_TYPE (rel->r_info)) | |
1261 | { | |
1262 | case R_XTENSA_GNU_VTINHERIT: | |
1263 | case R_XTENSA_GNU_VTENTRY: | |
1264 | return NULL; | |
1265 | } | |
1266 | ||
1267 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
e0001a05 NC |
1268 | } |
1269 | ||
7fa3d080 | 1270 | |
e0001a05 NC |
1271 | /* Update the GOT & PLT entry reference counts |
1272 | for the section being removed. */ | |
1273 | ||
1274 | static bfd_boolean | |
7fa3d080 | 1275 | elf_xtensa_gc_sweep_hook (bfd *abfd, |
28dbbc02 | 1276 | struct bfd_link_info *info, |
7fa3d080 BW |
1277 | asection *sec, |
1278 | const Elf_Internal_Rela *relocs) | |
e0001a05 NC |
1279 | { |
1280 | Elf_Internal_Shdr *symtab_hdr; | |
1281 | struct elf_link_hash_entry **sym_hashes; | |
e0001a05 | 1282 | const Elf_Internal_Rela *rel, *relend; |
28dbbc02 BW |
1283 | struct elf_xtensa_link_hash_table *htab; |
1284 | ||
1285 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1286 | if (htab == NULL) |
1287 | return FALSE; | |
e0001a05 | 1288 | |
7dda2462 TG |
1289 | if (info->relocatable) |
1290 | return TRUE; | |
1291 | ||
e0001a05 NC |
1292 | if ((sec->flags & SEC_ALLOC) == 0) |
1293 | return TRUE; | |
1294 | ||
1295 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1296 | sym_hashes = elf_sym_hashes (abfd); | |
e0001a05 NC |
1297 | |
1298 | relend = relocs + sec->reloc_count; | |
1299 | for (rel = relocs; rel < relend; rel++) | |
1300 | { | |
1301 | unsigned long r_symndx; | |
1302 | unsigned int r_type; | |
1303 | struct elf_link_hash_entry *h = NULL; | |
28dbbc02 BW |
1304 | struct elf_xtensa_link_hash_entry *eh; |
1305 | bfd_boolean is_got = FALSE; | |
1306 | bfd_boolean is_plt = FALSE; | |
1307 | bfd_boolean is_tlsfunc = FALSE; | |
e0001a05 NC |
1308 | |
1309 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1310 | if (r_symndx >= symtab_hdr->sh_info) | |
3eb128b2 AM |
1311 | { |
1312 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1313 | while (h->root.type == bfd_link_hash_indirect | |
1314 | || h->root.type == bfd_link_hash_warning) | |
1315 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1316 | } | |
28dbbc02 | 1317 | eh = elf_xtensa_hash_entry (h); |
e0001a05 NC |
1318 | |
1319 | r_type = ELF32_R_TYPE (rel->r_info); | |
1320 | switch (r_type) | |
1321 | { | |
28dbbc02 BW |
1322 | case R_XTENSA_TLSDESC_FN: |
1323 | if (info->shared) | |
1324 | { | |
1325 | is_got = TRUE; | |
1326 | is_tlsfunc = TRUE; | |
1327 | } | |
e0001a05 NC |
1328 | break; |
1329 | ||
28dbbc02 BW |
1330 | case R_XTENSA_TLSDESC_ARG: |
1331 | if (info->shared) | |
1332 | is_got = TRUE; | |
1333 | else | |
1334 | { | |
1335 | if (h && elf_xtensa_hash_entry (h) != htab->tlsbase) | |
1336 | is_got = TRUE; | |
1337 | } | |
e0001a05 NC |
1338 | break; |
1339 | ||
28dbbc02 BW |
1340 | case R_XTENSA_TLS_TPOFF: |
1341 | if (info->shared || h) | |
1342 | is_got = TRUE; | |
e0001a05 NC |
1343 | break; |
1344 | ||
28dbbc02 BW |
1345 | case R_XTENSA_32: |
1346 | is_got = TRUE; | |
e0001a05 | 1347 | break; |
28dbbc02 BW |
1348 | |
1349 | case R_XTENSA_PLT: | |
1350 | is_plt = TRUE; | |
1351 | break; | |
1352 | ||
1353 | default: | |
1354 | continue; | |
1355 | } | |
1356 | ||
1357 | if (h) | |
1358 | { | |
1359 | if (is_plt) | |
1360 | { | |
1361 | if (h->plt.refcount > 0) | |
1362 | h->plt.refcount--; | |
1363 | } | |
1364 | else if (is_got) | |
1365 | { | |
1366 | if (h->got.refcount > 0) | |
1367 | h->got.refcount--; | |
1368 | } | |
1369 | if (is_tlsfunc) | |
1370 | { | |
1371 | if (eh->tlsfunc_refcount > 0) | |
1372 | eh->tlsfunc_refcount--; | |
1373 | } | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | if (is_got || is_plt) | |
1378 | { | |
1379 | bfd_signed_vma *got_refcount | |
1380 | = &elf_local_got_refcounts (abfd) [r_symndx]; | |
1381 | if (*got_refcount > 0) | |
1382 | *got_refcount -= 1; | |
1383 | } | |
1384 | if (is_tlsfunc) | |
1385 | { | |
1386 | bfd_signed_vma *tlsfunc_refcount | |
1387 | = &elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx]; | |
1388 | if (*tlsfunc_refcount > 0) | |
1389 | *tlsfunc_refcount -= 1; | |
1390 | } | |
e0001a05 NC |
1391 | } |
1392 | } | |
1393 | ||
1394 | return TRUE; | |
1395 | } | |
1396 | ||
1397 | ||
1398 | /* Create all the dynamic sections. */ | |
1399 | ||
1400 | static bfd_boolean | |
7fa3d080 | 1401 | elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
e0001a05 | 1402 | { |
f0e6fdb2 | 1403 | struct elf_xtensa_link_hash_table *htab; |
e901de89 | 1404 | flagword flags, noalloc_flags; |
f0e6fdb2 BW |
1405 | |
1406 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1407 | if (htab == NULL) |
1408 | return FALSE; | |
e0001a05 NC |
1409 | |
1410 | /* First do all the standard stuff. */ | |
1411 | if (! _bfd_elf_create_dynamic_sections (dynobj, info)) | |
1412 | return FALSE; | |
f0e6fdb2 BW |
1413 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
1414 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1415 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1416 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
64e77c6d | 1417 | htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
e0001a05 NC |
1418 | |
1419 | /* Create any extra PLT sections in case check_relocs has already | |
1420 | been called on all the non-dynamic input files. */ | |
f0e6fdb2 | 1421 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1422 | return FALSE; |
1423 | ||
e901de89 BW |
1424 | noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1425 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1426 | flags = noalloc_flags | SEC_ALLOC | SEC_LOAD; | |
e0001a05 NC |
1427 | |
1428 | /* Mark the ".got.plt" section READONLY. */ | |
f0e6fdb2 BW |
1429 | if (htab->sgotplt == NULL |
1430 | || ! bfd_set_section_flags (dynobj, htab->sgotplt, flags)) | |
e0001a05 NC |
1431 | return FALSE; |
1432 | ||
e901de89 | 1433 | /* Create ".got.loc" (literal tables for use by dynamic linker). */ |
f0e6fdb2 BW |
1434 | htab->sgotloc = bfd_make_section_with_flags (dynobj, ".got.loc", flags); |
1435 | if (htab->sgotloc == NULL | |
1436 | || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2)) | |
e901de89 BW |
1437 | return FALSE; |
1438 | ||
e0001a05 | 1439 | /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */ |
f0e6fdb2 BW |
1440 | htab->spltlittbl = bfd_make_section_with_flags (dynobj, ".xt.lit.plt", |
1441 | noalloc_flags); | |
1442 | if (htab->spltlittbl == NULL | |
1443 | || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2)) | |
e0001a05 NC |
1444 | return FALSE; |
1445 | ||
1446 | return TRUE; | |
1447 | } | |
1448 | ||
1449 | ||
1450 | static bfd_boolean | |
f0e6fdb2 | 1451 | add_extra_plt_sections (struct bfd_link_info *info, int count) |
e0001a05 | 1452 | { |
f0e6fdb2 | 1453 | bfd *dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
1454 | int chunk; |
1455 | ||
1456 | /* Iterate over all chunks except 0 which uses the standard ".plt" and | |
1457 | ".got.plt" sections. */ | |
1458 | for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--) | |
1459 | { | |
1460 | char *sname; | |
1461 | flagword flags; | |
1462 | asection *s; | |
1463 | ||
1464 | /* Stop when we find a section has already been created. */ | |
f0e6fdb2 | 1465 | if (elf_xtensa_get_plt_section (info, chunk)) |
e0001a05 NC |
1466 | break; |
1467 | ||
1468 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1469 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1470 | ||
1471 | sname = (char *) bfd_malloc (10); | |
1472 | sprintf (sname, ".plt.%u", chunk); | |
ba05963f | 1473 | s = bfd_make_section_with_flags (dynobj, sname, flags | SEC_CODE); |
e0001a05 | 1474 | if (s == NULL |
e0001a05 NC |
1475 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1476 | return FALSE; | |
1477 | ||
1478 | sname = (char *) bfd_malloc (14); | |
1479 | sprintf (sname, ".got.plt.%u", chunk); | |
3496cb2a | 1480 | s = bfd_make_section_with_flags (dynobj, sname, flags); |
e0001a05 | 1481 | if (s == NULL |
e0001a05 NC |
1482 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1483 | return FALSE; | |
1484 | } | |
1485 | ||
1486 | return TRUE; | |
1487 | } | |
1488 | ||
1489 | ||
1490 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1491 | regular object. The current definition is in some section of the | |
1492 | dynamic object, but we're not including those sections. We have to | |
1493 | change the definition to something the rest of the link can | |
1494 | understand. */ | |
1495 | ||
1496 | static bfd_boolean | |
7fa3d080 BW |
1497 | elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1498 | struct elf_link_hash_entry *h) | |
e0001a05 NC |
1499 | { |
1500 | /* If this is a weak symbol, and there is a real definition, the | |
1501 | processor independent code will have arranged for us to see the | |
1502 | real definition first, and we can just use the same value. */ | |
7fa3d080 | 1503 | if (h->u.weakdef) |
e0001a05 | 1504 | { |
f6e332e6 AM |
1505 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1506 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1507 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1508 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
e0001a05 NC |
1509 | return TRUE; |
1510 | } | |
1511 | ||
1512 | /* This is a reference to a symbol defined by a dynamic object. The | |
1513 | reference must go through the GOT, so there's no need for COPY relocs, | |
1514 | .dynbss, etc. */ | |
1515 | ||
1516 | return TRUE; | |
1517 | } | |
1518 | ||
1519 | ||
e0001a05 | 1520 | static bfd_boolean |
f1ab2340 | 1521 | elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg) |
e0001a05 | 1522 | { |
f1ab2340 BW |
1523 | struct bfd_link_info *info; |
1524 | struct elf_xtensa_link_hash_table *htab; | |
28dbbc02 | 1525 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (h); |
e0001a05 | 1526 | |
f1ab2340 BW |
1527 | if (h->root.type == bfd_link_hash_indirect) |
1528 | return TRUE; | |
e0001a05 NC |
1529 | |
1530 | if (h->root.type == bfd_link_hash_warning) | |
1531 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1532 | ||
f1ab2340 BW |
1533 | info = (struct bfd_link_info *) arg; |
1534 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1535 | if (htab == NULL) |
1536 | return FALSE; | |
e0001a05 | 1537 | |
28dbbc02 BW |
1538 | /* If we saw any use of an IE model for this symbol, we can then optimize |
1539 | away GOT entries for any TLSDESC_FN relocs. */ | |
1540 | if ((eh->tls_type & GOT_TLS_IE) != 0) | |
1541 | { | |
1542 | BFD_ASSERT (h->got.refcount >= eh->tlsfunc_refcount); | |
1543 | h->got.refcount -= eh->tlsfunc_refcount; | |
1544 | } | |
e0001a05 | 1545 | |
28dbbc02 | 1546 | if (! elf_xtensa_dynamic_symbol_p (h, info)) |
95147441 | 1547 | elf_xtensa_make_sym_local (info, h); |
e0001a05 | 1548 | |
f1ab2340 BW |
1549 | if (h->plt.refcount > 0) |
1550 | htab->srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1551 | |
1552 | if (h->got.refcount > 0) | |
f1ab2340 | 1553 | htab->srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1554 | |
1555 | return TRUE; | |
1556 | } | |
1557 | ||
1558 | ||
1559 | static void | |
f0e6fdb2 | 1560 | elf_xtensa_allocate_local_got_size (struct bfd_link_info *info) |
e0001a05 | 1561 | { |
f0e6fdb2 | 1562 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1563 | bfd *i; |
1564 | ||
f0e6fdb2 | 1565 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
1566 | if (htab == NULL) |
1567 | return; | |
f0e6fdb2 | 1568 | |
e0001a05 NC |
1569 | for (i = info->input_bfds; i; i = i->link_next) |
1570 | { | |
1571 | bfd_signed_vma *local_got_refcounts; | |
1572 | bfd_size_type j, cnt; | |
1573 | Elf_Internal_Shdr *symtab_hdr; | |
1574 | ||
1575 | local_got_refcounts = elf_local_got_refcounts (i); | |
1576 | if (!local_got_refcounts) | |
1577 | continue; | |
1578 | ||
1579 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
1580 | cnt = symtab_hdr->sh_info; | |
1581 | ||
1582 | for (j = 0; j < cnt; ++j) | |
1583 | { | |
28dbbc02 BW |
1584 | /* If we saw any use of an IE model for this symbol, we can |
1585 | then optimize away GOT entries for any TLSDESC_FN relocs. */ | |
1586 | if ((elf_xtensa_local_got_tls_type (i) [j] & GOT_TLS_IE) != 0) | |
1587 | { | |
1588 | bfd_signed_vma *tlsfunc_refcount | |
1589 | = &elf_xtensa_local_tlsfunc_refcounts (i) [j]; | |
1590 | BFD_ASSERT (local_got_refcounts[j] >= *tlsfunc_refcount); | |
1591 | local_got_refcounts[j] -= *tlsfunc_refcount; | |
1592 | } | |
1593 | ||
e0001a05 | 1594 | if (local_got_refcounts[j] > 0) |
f0e6fdb2 BW |
1595 | htab->srelgot->size += (local_got_refcounts[j] |
1596 | * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1597 | } |
1598 | } | |
1599 | } | |
1600 | ||
1601 | ||
1602 | /* Set the sizes of the dynamic sections. */ | |
1603 | ||
1604 | static bfd_boolean | |
7fa3d080 BW |
1605 | elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1606 | struct bfd_link_info *info) | |
e0001a05 | 1607 | { |
f0e6fdb2 | 1608 | struct elf_xtensa_link_hash_table *htab; |
e901de89 BW |
1609 | bfd *dynobj, *abfd; |
1610 | asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc; | |
e0001a05 NC |
1611 | bfd_boolean relplt, relgot; |
1612 | int plt_entries, plt_chunks, chunk; | |
1613 | ||
1614 | plt_entries = 0; | |
1615 | plt_chunks = 0; | |
e0001a05 | 1616 | |
f0e6fdb2 | 1617 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
1618 | if (htab == NULL) |
1619 | return FALSE; | |
1620 | ||
e0001a05 NC |
1621 | dynobj = elf_hash_table (info)->dynobj; |
1622 | if (dynobj == NULL) | |
1623 | abort (); | |
f0e6fdb2 BW |
1624 | srelgot = htab->srelgot; |
1625 | srelplt = htab->srelplt; | |
e0001a05 NC |
1626 | |
1627 | if (elf_hash_table (info)->dynamic_sections_created) | |
1628 | { | |
f0e6fdb2 BW |
1629 | BFD_ASSERT (htab->srelgot != NULL |
1630 | && htab->srelplt != NULL | |
1631 | && htab->sgot != NULL | |
1632 | && htab->spltlittbl != NULL | |
1633 | && htab->sgotloc != NULL); | |
1634 | ||
e0001a05 | 1635 | /* Set the contents of the .interp section to the interpreter. */ |
893c4fe2 | 1636 | if (info->executable) |
e0001a05 NC |
1637 | { |
1638 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1639 | if (s == NULL) | |
1640 | abort (); | |
eea6121a | 1641 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
e0001a05 NC |
1642 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1643 | } | |
1644 | ||
1645 | /* Allocate room for one word in ".got". */ | |
f0e6fdb2 | 1646 | htab->sgot->size = 4; |
e0001a05 | 1647 | |
f1ab2340 BW |
1648 | /* Allocate space in ".rela.got" for literals that reference global |
1649 | symbols and space in ".rela.plt" for literals that have PLT | |
1650 | entries. */ | |
e0001a05 | 1651 | elf_link_hash_traverse (elf_hash_table (info), |
f1ab2340 | 1652 | elf_xtensa_allocate_dynrelocs, |
7fa3d080 | 1653 | (void *) info); |
e0001a05 | 1654 | |
e0001a05 NC |
1655 | /* If we are generating a shared object, we also need space in |
1656 | ".rela.got" for R_XTENSA_RELATIVE relocs for literals that | |
1657 | reference local symbols. */ | |
1658 | if (info->shared) | |
f0e6fdb2 | 1659 | elf_xtensa_allocate_local_got_size (info); |
e0001a05 | 1660 | |
e0001a05 NC |
1661 | /* Allocate space in ".plt" to match the size of ".rela.plt". For |
1662 | each PLT entry, we need the PLT code plus a 4-byte literal. | |
1663 | For each chunk of ".plt", we also need two more 4-byte | |
1664 | literals, two corresponding entries in ".rela.got", and an | |
1665 | 8-byte entry in ".xt.lit.plt". */ | |
f0e6fdb2 | 1666 | spltlittbl = htab->spltlittbl; |
eea6121a | 1667 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
1668 | plt_chunks = |
1669 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
1670 | ||
1671 | /* Iterate over all the PLT chunks, including any extra sections | |
1672 | created earlier because the initial count of PLT relocations | |
1673 | was an overestimate. */ | |
1674 | for (chunk = 0; | |
f0e6fdb2 | 1675 | (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL; |
e0001a05 NC |
1676 | chunk++) |
1677 | { | |
1678 | int chunk_entries; | |
1679 | ||
f0e6fdb2 BW |
1680 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
1681 | BFD_ASSERT (sgotplt != NULL); | |
e0001a05 NC |
1682 | |
1683 | if (chunk < plt_chunks - 1) | |
1684 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
1685 | else if (chunk == plt_chunks - 1) | |
1686 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
1687 | else | |
1688 | chunk_entries = 0; | |
1689 | ||
1690 | if (chunk_entries != 0) | |
1691 | { | |
eea6121a AM |
1692 | sgotplt->size = 4 * (chunk_entries + 2); |
1693 | splt->size = PLT_ENTRY_SIZE * chunk_entries; | |
1694 | srelgot->size += 2 * sizeof (Elf32_External_Rela); | |
1695 | spltlittbl->size += 8; | |
e0001a05 NC |
1696 | } |
1697 | else | |
1698 | { | |
eea6121a AM |
1699 | sgotplt->size = 0; |
1700 | splt->size = 0; | |
e0001a05 NC |
1701 | } |
1702 | } | |
e901de89 BW |
1703 | |
1704 | /* Allocate space in ".got.loc" to match the total size of all the | |
1705 | literal tables. */ | |
f0e6fdb2 | 1706 | sgotloc = htab->sgotloc; |
eea6121a | 1707 | sgotloc->size = spltlittbl->size; |
e901de89 BW |
1708 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
1709 | { | |
1710 | if (abfd->flags & DYNAMIC) | |
1711 | continue; | |
1712 | for (s = abfd->sections; s != NULL; s = s->next) | |
1713 | { | |
b536dc1e BW |
1714 | if (! elf_discarded_section (s) |
1715 | && xtensa_is_littable_section (s) | |
1716 | && s != spltlittbl) | |
eea6121a | 1717 | sgotloc->size += s->size; |
e901de89 BW |
1718 | } |
1719 | } | |
e0001a05 NC |
1720 | } |
1721 | ||
1722 | /* Allocate memory for dynamic sections. */ | |
1723 | relplt = FALSE; | |
1724 | relgot = FALSE; | |
1725 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1726 | { | |
1727 | const char *name; | |
e0001a05 NC |
1728 | |
1729 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1730 | continue; | |
1731 | ||
1732 | /* It's OK to base decisions on the section name, because none | |
1733 | of the dynobj section names depend upon the input files. */ | |
1734 | name = bfd_get_section_name (dynobj, s); | |
1735 | ||
0112cd26 | 1736 | if (CONST_STRNEQ (name, ".rela")) |
e0001a05 | 1737 | { |
c456f082 | 1738 | if (s->size != 0) |
e0001a05 | 1739 | { |
c456f082 AM |
1740 | if (strcmp (name, ".rela.plt") == 0) |
1741 | relplt = TRUE; | |
1742 | else if (strcmp (name, ".rela.got") == 0) | |
1743 | relgot = TRUE; | |
1744 | ||
1745 | /* We use the reloc_count field as a counter if we need | |
1746 | to copy relocs into the output file. */ | |
1747 | s->reloc_count = 0; | |
e0001a05 NC |
1748 | } |
1749 | } | |
0112cd26 NC |
1750 | else if (! CONST_STRNEQ (name, ".plt.") |
1751 | && ! CONST_STRNEQ (name, ".got.plt.") | |
c456f082 | 1752 | && strcmp (name, ".got") != 0 |
e0001a05 NC |
1753 | && strcmp (name, ".plt") != 0 |
1754 | && strcmp (name, ".got.plt") != 0 | |
e901de89 BW |
1755 | && strcmp (name, ".xt.lit.plt") != 0 |
1756 | && strcmp (name, ".got.loc") != 0) | |
e0001a05 NC |
1757 | { |
1758 | /* It's not one of our sections, so don't allocate space. */ | |
1759 | continue; | |
1760 | } | |
1761 | ||
c456f082 AM |
1762 | if (s->size == 0) |
1763 | { | |
1764 | /* If we don't need this section, strip it from the output | |
1765 | file. We must create the ".plt*" and ".got.plt*" | |
1766 | sections in create_dynamic_sections and/or check_relocs | |
1767 | based on a conservative estimate of the PLT relocation | |
1768 | count, because the sections must be created before the | |
1769 | linker maps input sections to output sections. The | |
1770 | linker does that before size_dynamic_sections, where we | |
1771 | compute the exact size of the PLT, so there may be more | |
1772 | of these sections than are actually needed. */ | |
1773 | s->flags |= SEC_EXCLUDE; | |
1774 | } | |
1775 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
e0001a05 NC |
1776 | { |
1777 | /* Allocate memory for the section contents. */ | |
eea6121a | 1778 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1779 | if (s->contents == NULL) |
e0001a05 NC |
1780 | return FALSE; |
1781 | } | |
1782 | } | |
1783 | ||
1784 | if (elf_hash_table (info)->dynamic_sections_created) | |
1785 | { | |
1786 | /* Add the special XTENSA_RTLD relocations now. The offsets won't be | |
1787 | known until finish_dynamic_sections, but we need to get the relocs | |
1788 | in place before they are sorted. */ | |
e0001a05 NC |
1789 | for (chunk = 0; chunk < plt_chunks; chunk++) |
1790 | { | |
1791 | Elf_Internal_Rela irela; | |
1792 | bfd_byte *loc; | |
1793 | ||
1794 | irela.r_offset = 0; | |
1795 | irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD); | |
1796 | irela.r_addend = 0; | |
1797 | ||
1798 | loc = (srelgot->contents | |
1799 | + srelgot->reloc_count * sizeof (Elf32_External_Rela)); | |
1800 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
1801 | bfd_elf32_swap_reloca_out (output_bfd, &irela, | |
1802 | loc + sizeof (Elf32_External_Rela)); | |
1803 | srelgot->reloc_count += 2; | |
1804 | } | |
1805 | ||
1806 | /* Add some entries to the .dynamic section. We fill in the | |
1807 | values later, in elf_xtensa_finish_dynamic_sections, but we | |
1808 | must add the entries now so that we get the correct size for | |
1809 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1810 | dynamic linker and used by the debugger. */ | |
1811 | #define add_dynamic_entry(TAG, VAL) \ | |
5a580b3a | 1812 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
e0001a05 | 1813 | |
ba05963f | 1814 | if (info->executable) |
e0001a05 NC |
1815 | { |
1816 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1817 | return FALSE; | |
1818 | } | |
1819 | ||
1820 | if (relplt) | |
1821 | { | |
c243ad3b | 1822 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
e0001a05 NC |
1823 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
1824 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1825 | return FALSE; | |
1826 | } | |
1827 | ||
1828 | if (relgot) | |
1829 | { | |
1830 | if (!add_dynamic_entry (DT_RELA, 0) | |
1831 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1832 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
1833 | return FALSE; | |
1834 | } | |
1835 | ||
c243ad3b BW |
1836 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1837 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0) | |
e0001a05 NC |
1838 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0)) |
1839 | return FALSE; | |
1840 | } | |
1841 | #undef add_dynamic_entry | |
1842 | ||
1843 | return TRUE; | |
1844 | } | |
1845 | ||
28dbbc02 BW |
1846 | static bfd_boolean |
1847 | elf_xtensa_always_size_sections (bfd *output_bfd, | |
1848 | struct bfd_link_info *info) | |
1849 | { | |
1850 | struct elf_xtensa_link_hash_table *htab; | |
1851 | asection *tls_sec; | |
1852 | ||
1853 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1854 | if (htab == NULL) |
1855 | return FALSE; | |
1856 | ||
28dbbc02 BW |
1857 | tls_sec = htab->elf.tls_sec; |
1858 | ||
1859 | if (tls_sec && (htab->tlsbase->tls_type & GOT_TLS_ANY) != 0) | |
1860 | { | |
1861 | struct elf_link_hash_entry *tlsbase = &htab->tlsbase->elf; | |
1862 | struct bfd_link_hash_entry *bh = &tlsbase->root; | |
1863 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
1864 | ||
1865 | tlsbase->type = STT_TLS; | |
1866 | if (!(_bfd_generic_link_add_one_symbol | |
1867 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1868 | tls_sec, 0, NULL, FALSE, | |
1869 | bed->collect, &bh))) | |
1870 | return FALSE; | |
1871 | tlsbase->def_regular = 1; | |
1872 | tlsbase->other = STV_HIDDEN; | |
1873 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1874 | } | |
1875 | ||
1876 | return TRUE; | |
1877 | } | |
1878 | ||
e0001a05 | 1879 | \f |
28dbbc02 BW |
1880 | /* Return the base VMA address which should be subtracted from real addresses |
1881 | when resolving @dtpoff relocation. | |
1882 | This is PT_TLS segment p_vaddr. */ | |
1883 | ||
1884 | static bfd_vma | |
1885 | dtpoff_base (struct bfd_link_info *info) | |
1886 | { | |
1887 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1888 | if (elf_hash_table (info)->tls_sec == NULL) | |
1889 | return 0; | |
1890 | return elf_hash_table (info)->tls_sec->vma; | |
1891 | } | |
1892 | ||
1893 | /* Return the relocation value for @tpoff relocation | |
1894 | if STT_TLS virtual address is ADDRESS. */ | |
1895 | ||
1896 | static bfd_vma | |
1897 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
1898 | { | |
1899 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
1900 | bfd_vma base; | |
1901 | ||
1902 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1903 | if (htab->tls_sec == NULL) | |
1904 | return 0; | |
1905 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); | |
1906 | return address - htab->tls_sec->vma + base; | |
1907 | } | |
1908 | ||
e0001a05 NC |
1909 | /* Perform the specified relocation. The instruction at (contents + address) |
1910 | is modified to set one operand to represent the value in "relocation". The | |
1911 | operand position is determined by the relocation type recorded in the | |
1912 | howto. */ | |
1913 | ||
1914 | #define CALL_SEGMENT_BITS (30) | |
7fa3d080 | 1915 | #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS) |
e0001a05 NC |
1916 | |
1917 | static bfd_reloc_status_type | |
7fa3d080 BW |
1918 | elf_xtensa_do_reloc (reloc_howto_type *howto, |
1919 | bfd *abfd, | |
1920 | asection *input_section, | |
1921 | bfd_vma relocation, | |
1922 | bfd_byte *contents, | |
1923 | bfd_vma address, | |
1924 | bfd_boolean is_weak_undef, | |
1925 | char **error_message) | |
e0001a05 | 1926 | { |
43cd72b9 | 1927 | xtensa_format fmt; |
e0001a05 | 1928 | xtensa_opcode opcode; |
e0001a05 | 1929 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
1930 | static xtensa_insnbuf ibuff = NULL; |
1931 | static xtensa_insnbuf sbuff = NULL; | |
1bbb5f21 | 1932 | bfd_vma self_address; |
43cd72b9 BW |
1933 | bfd_size_type input_size; |
1934 | int opnd, slot; | |
e0001a05 NC |
1935 | uint32 newval; |
1936 | ||
43cd72b9 BW |
1937 | if (!ibuff) |
1938 | { | |
1939 | ibuff = xtensa_insnbuf_alloc (isa); | |
1940 | sbuff = xtensa_insnbuf_alloc (isa); | |
1941 | } | |
1942 | ||
1943 | input_size = bfd_get_section_limit (abfd, input_section); | |
1944 | ||
1bbb5f21 BW |
1945 | /* Calculate the PC address for this instruction. */ |
1946 | self_address = (input_section->output_section->vma | |
1947 | + input_section->output_offset | |
1948 | + address); | |
1949 | ||
e0001a05 NC |
1950 | switch (howto->type) |
1951 | { | |
1952 | case R_XTENSA_NONE: | |
43cd72b9 BW |
1953 | case R_XTENSA_DIFF8: |
1954 | case R_XTENSA_DIFF16: | |
1955 | case R_XTENSA_DIFF32: | |
28dbbc02 BW |
1956 | case R_XTENSA_TLS_FUNC: |
1957 | case R_XTENSA_TLS_ARG: | |
1958 | case R_XTENSA_TLS_CALL: | |
e0001a05 NC |
1959 | return bfd_reloc_ok; |
1960 | ||
1961 | case R_XTENSA_ASM_EXPAND: | |
1962 | if (!is_weak_undef) | |
1963 | { | |
1964 | /* Check for windowed CALL across a 1GB boundary. */ | |
91d6fa6a NC |
1965 | opcode = get_expanded_call_opcode (contents + address, |
1966 | input_size - address, 0); | |
e0001a05 NC |
1967 | if (is_windowed_call_opcode (opcode)) |
1968 | { | |
43cd72b9 BW |
1969 | if ((self_address >> CALL_SEGMENT_BITS) |
1970 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 NC |
1971 | { |
1972 | *error_message = "windowed longcall crosses 1GB boundary; " | |
1973 | "return may fail"; | |
1974 | return bfd_reloc_dangerous; | |
1975 | } | |
1976 | } | |
1977 | } | |
1978 | return bfd_reloc_ok; | |
1979 | ||
1980 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 | 1981 | { |
e0001a05 | 1982 | /* Convert the L32R/CALLX to CALL. */ |
43cd72b9 BW |
1983 | bfd_reloc_status_type retval = |
1984 | elf_xtensa_do_asm_simplify (contents, address, input_size, | |
1985 | error_message); | |
e0001a05 | 1986 | if (retval != bfd_reloc_ok) |
43cd72b9 | 1987 | return bfd_reloc_dangerous; |
e0001a05 NC |
1988 | |
1989 | /* The CALL needs to be relocated. Continue below for that part. */ | |
1990 | address += 3; | |
c46082c8 | 1991 | self_address += 3; |
43cd72b9 | 1992 | howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ]; |
e0001a05 NC |
1993 | } |
1994 | break; | |
1995 | ||
1996 | case R_XTENSA_32: | |
e0001a05 NC |
1997 | { |
1998 | bfd_vma x; | |
1999 | x = bfd_get_32 (abfd, contents + address); | |
2000 | x = x + relocation; | |
2001 | bfd_put_32 (abfd, x, contents + address); | |
2002 | } | |
2003 | return bfd_reloc_ok; | |
1bbb5f21 BW |
2004 | |
2005 | case R_XTENSA_32_PCREL: | |
2006 | bfd_put_32 (abfd, relocation - self_address, contents + address); | |
2007 | return bfd_reloc_ok; | |
28dbbc02 BW |
2008 | |
2009 | case R_XTENSA_PLT: | |
2010 | case R_XTENSA_TLSDESC_FN: | |
2011 | case R_XTENSA_TLSDESC_ARG: | |
2012 | case R_XTENSA_TLS_DTPOFF: | |
2013 | case R_XTENSA_TLS_TPOFF: | |
2014 | bfd_put_32 (abfd, relocation, contents + address); | |
2015 | return bfd_reloc_ok; | |
e0001a05 NC |
2016 | } |
2017 | ||
43cd72b9 BW |
2018 | /* Only instruction slot-specific relocations handled below.... */ |
2019 | slot = get_relocation_slot (howto->type); | |
2020 | if (slot == XTENSA_UNDEFINED) | |
e0001a05 | 2021 | { |
43cd72b9 | 2022 | *error_message = "unexpected relocation"; |
e0001a05 NC |
2023 | return bfd_reloc_dangerous; |
2024 | } | |
2025 | ||
43cd72b9 BW |
2026 | /* Read the instruction into a buffer and decode the opcode. */ |
2027 | xtensa_insnbuf_from_chars (isa, ibuff, contents + address, | |
2028 | input_size - address); | |
2029 | fmt = xtensa_format_decode (isa, ibuff); | |
2030 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 2031 | { |
43cd72b9 | 2032 | *error_message = "cannot decode instruction format"; |
e0001a05 NC |
2033 | return bfd_reloc_dangerous; |
2034 | } | |
2035 | ||
43cd72b9 | 2036 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); |
e0001a05 | 2037 | |
43cd72b9 BW |
2038 | opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff); |
2039 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 2040 | { |
43cd72b9 | 2041 | *error_message = "cannot decode instruction opcode"; |
e0001a05 NC |
2042 | return bfd_reloc_dangerous; |
2043 | } | |
2044 | ||
43cd72b9 BW |
2045 | /* Check for opcode-specific "alternate" relocations. */ |
2046 | if (is_alt_relocation (howto->type)) | |
2047 | { | |
2048 | if (opcode == get_l32r_opcode ()) | |
2049 | { | |
2050 | /* Handle the special-case of non-PC-relative L32R instructions. */ | |
2051 | bfd *output_bfd = input_section->output_section->owner; | |
2052 | asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4"); | |
2053 | if (!lit4_sec) | |
2054 | { | |
2055 | *error_message = "relocation references missing .lit4 section"; | |
2056 | return bfd_reloc_dangerous; | |
2057 | } | |
2058 | self_address = ((lit4_sec->vma & ~0xfff) | |
2059 | + 0x40000 - 3); /* -3 to compensate for do_reloc */ | |
2060 | newval = relocation; | |
2061 | opnd = 1; | |
2062 | } | |
2063 | else if (opcode == get_const16_opcode ()) | |
2064 | { | |
2065 | /* ALT used for high 16 bits. */ | |
2066 | newval = relocation >> 16; | |
2067 | opnd = 1; | |
2068 | } | |
2069 | else | |
2070 | { | |
2071 | /* No other "alternate" relocations currently defined. */ | |
2072 | *error_message = "unexpected relocation"; | |
2073 | return bfd_reloc_dangerous; | |
2074 | } | |
2075 | } | |
2076 | else /* Not an "alternate" relocation.... */ | |
2077 | { | |
2078 | if (opcode == get_const16_opcode ()) | |
2079 | { | |
2080 | newval = relocation & 0xffff; | |
2081 | opnd = 1; | |
2082 | } | |
2083 | else | |
2084 | { | |
2085 | /* ...normal PC-relative relocation.... */ | |
2086 | ||
2087 | /* Determine which operand is being relocated. */ | |
2088 | opnd = get_relocation_opnd (opcode, howto->type); | |
2089 | if (opnd == XTENSA_UNDEFINED) | |
2090 | { | |
2091 | *error_message = "unexpected relocation"; | |
2092 | return bfd_reloc_dangerous; | |
2093 | } | |
2094 | ||
2095 | if (!howto->pc_relative) | |
2096 | { | |
2097 | *error_message = "expected PC-relative relocation"; | |
2098 | return bfd_reloc_dangerous; | |
2099 | } | |
e0001a05 | 2100 | |
43cd72b9 BW |
2101 | newval = relocation; |
2102 | } | |
2103 | } | |
e0001a05 | 2104 | |
43cd72b9 BW |
2105 | /* Apply the relocation. */ |
2106 | if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address) | |
2107 | || xtensa_operand_encode (isa, opcode, opnd, &newval) | |
2108 | || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot, | |
2109 | sbuff, newval)) | |
e0001a05 | 2110 | { |
2db662be BW |
2111 | const char *opname = xtensa_opcode_name (isa, opcode); |
2112 | const char *msg; | |
2113 | ||
2114 | msg = "cannot encode"; | |
2115 | if (is_direct_call_opcode (opcode)) | |
2116 | { | |
2117 | if ((relocation & 0x3) != 0) | |
2118 | msg = "misaligned call target"; | |
2119 | else | |
2120 | msg = "call target out of range"; | |
2121 | } | |
2122 | else if (opcode == get_l32r_opcode ()) | |
2123 | { | |
2124 | if ((relocation & 0x3) != 0) | |
2125 | msg = "misaligned literal target"; | |
2126 | else if (is_alt_relocation (howto->type)) | |
2127 | msg = "literal target out of range (too many literals)"; | |
2128 | else if (self_address > relocation) | |
2129 | msg = "literal target out of range (try using text-section-literals)"; | |
2130 | else | |
2131 | msg = "literal placed after use"; | |
2132 | } | |
2133 | ||
2134 | *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg); | |
e0001a05 NC |
2135 | return bfd_reloc_dangerous; |
2136 | } | |
2137 | ||
43cd72b9 | 2138 | /* Check for calls across 1GB boundaries. */ |
e0001a05 NC |
2139 | if (is_direct_call_opcode (opcode) |
2140 | && is_windowed_call_opcode (opcode)) | |
2141 | { | |
43cd72b9 BW |
2142 | if ((self_address >> CALL_SEGMENT_BITS) |
2143 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 | 2144 | { |
43cd72b9 BW |
2145 | *error_message = |
2146 | "windowed call crosses 1GB boundary; return may fail"; | |
e0001a05 NC |
2147 | return bfd_reloc_dangerous; |
2148 | } | |
2149 | } | |
2150 | ||
43cd72b9 BW |
2151 | /* Write the modified instruction back out of the buffer. */ |
2152 | xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff); | |
2153 | xtensa_insnbuf_to_chars (isa, ibuff, contents + address, | |
2154 | input_size - address); | |
e0001a05 NC |
2155 | return bfd_reloc_ok; |
2156 | } | |
2157 | ||
2158 | ||
2db662be | 2159 | static char * |
7fa3d080 | 2160 | vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...) |
e0001a05 NC |
2161 | { |
2162 | /* To reduce the size of the memory leak, | |
2163 | we only use a single message buffer. */ | |
2164 | static bfd_size_type alloc_size = 0; | |
2165 | static char *message = NULL; | |
2166 | bfd_size_type orig_len, len = 0; | |
2167 | bfd_boolean is_append; | |
2168 | ||
2169 | VA_OPEN (ap, arglen); | |
2170 | VA_FIXEDARG (ap, const char *, origmsg); | |
2171 | ||
2172 | is_append = (origmsg == message); | |
2173 | ||
2174 | orig_len = strlen (origmsg); | |
2175 | len = orig_len + strlen (fmt) + arglen + 20; | |
2176 | if (len > alloc_size) | |
2177 | { | |
515ef31d | 2178 | message = (char *) bfd_realloc_or_free (message, len); |
e0001a05 NC |
2179 | alloc_size = len; |
2180 | } | |
515ef31d NC |
2181 | if (message != NULL) |
2182 | { | |
2183 | if (!is_append) | |
2184 | memcpy (message, origmsg, orig_len); | |
2185 | vsprintf (message + orig_len, fmt, ap); | |
2186 | } | |
e0001a05 NC |
2187 | VA_CLOSE (ap); |
2188 | return message; | |
2189 | } | |
2190 | ||
2191 | ||
e0001a05 NC |
2192 | /* This function is registered as the "special_function" in the |
2193 | Xtensa howto for handling simplify operations. | |
2194 | bfd_perform_relocation / bfd_install_relocation use it to | |
2195 | perform (install) the specified relocation. Since this replaces the code | |
2196 | in bfd_perform_relocation, it is basically an Xtensa-specific, | |
2197 | stripped-down version of bfd_perform_relocation. */ | |
2198 | ||
2199 | static bfd_reloc_status_type | |
7fa3d080 BW |
2200 | bfd_elf_xtensa_reloc (bfd *abfd, |
2201 | arelent *reloc_entry, | |
2202 | asymbol *symbol, | |
2203 | void *data, | |
2204 | asection *input_section, | |
2205 | bfd *output_bfd, | |
2206 | char **error_message) | |
e0001a05 NC |
2207 | { |
2208 | bfd_vma relocation; | |
2209 | bfd_reloc_status_type flag; | |
2210 | bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
2211 | bfd_vma output_base = 0; | |
2212 | reloc_howto_type *howto = reloc_entry->howto; | |
2213 | asection *reloc_target_output_section; | |
2214 | bfd_boolean is_weak_undef; | |
2215 | ||
dd1a320b BW |
2216 | if (!xtensa_default_isa) |
2217 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
2218 | ||
1049f94e | 2219 | /* ELF relocs are against symbols. If we are producing relocatable |
e0001a05 NC |
2220 | output, and the reloc is against an external symbol, the resulting |
2221 | reloc will also be against the same symbol. In such a case, we | |
2222 | don't want to change anything about the way the reloc is handled, | |
2223 | since it will all be done at final link time. This test is similar | |
2224 | to what bfd_elf_generic_reloc does except that it lets relocs with | |
2225 | howto->partial_inplace go through even if the addend is non-zero. | |
2226 | (The real problem is that partial_inplace is set for XTENSA_32 | |
2227 | relocs to begin with, but that's a long story and there's little we | |
2228 | can do about it now....) */ | |
2229 | ||
7fa3d080 | 2230 | if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0) |
e0001a05 NC |
2231 | { |
2232 | reloc_entry->address += input_section->output_offset; | |
2233 | return bfd_reloc_ok; | |
2234 | } | |
2235 | ||
2236 | /* Is the address of the relocation really within the section? */ | |
07515404 | 2237 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
e0001a05 NC |
2238 | return bfd_reloc_outofrange; |
2239 | ||
4cc11e76 | 2240 | /* Work out which section the relocation is targeted at and the |
e0001a05 NC |
2241 | initial relocation command value. */ |
2242 | ||
2243 | /* Get symbol value. (Common symbols are special.) */ | |
2244 | if (bfd_is_com_section (symbol->section)) | |
2245 | relocation = 0; | |
2246 | else | |
2247 | relocation = symbol->value; | |
2248 | ||
2249 | reloc_target_output_section = symbol->section->output_section; | |
2250 | ||
2251 | /* Convert input-section-relative symbol value to absolute. */ | |
2252 | if ((output_bfd && !howto->partial_inplace) | |
2253 | || reloc_target_output_section == NULL) | |
2254 | output_base = 0; | |
2255 | else | |
2256 | output_base = reloc_target_output_section->vma; | |
2257 | ||
2258 | relocation += output_base + symbol->section->output_offset; | |
2259 | ||
2260 | /* Add in supplied addend. */ | |
2261 | relocation += reloc_entry->addend; | |
2262 | ||
2263 | /* Here the variable relocation holds the final address of the | |
2264 | symbol we are relocating against, plus any addend. */ | |
2265 | if (output_bfd) | |
2266 | { | |
2267 | if (!howto->partial_inplace) | |
2268 | { | |
2269 | /* This is a partial relocation, and we want to apply the relocation | |
2270 | to the reloc entry rather than the raw data. Everything except | |
2271 | relocations against section symbols has already been handled | |
2272 | above. */ | |
43cd72b9 | 2273 | |
e0001a05 NC |
2274 | BFD_ASSERT (symbol->flags & BSF_SECTION_SYM); |
2275 | reloc_entry->addend = relocation; | |
2276 | reloc_entry->address += input_section->output_offset; | |
2277 | return bfd_reloc_ok; | |
2278 | } | |
2279 | else | |
2280 | { | |
2281 | reloc_entry->address += input_section->output_offset; | |
2282 | reloc_entry->addend = 0; | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | is_weak_undef = (bfd_is_und_section (symbol->section) | |
2287 | && (symbol->flags & BSF_WEAK) != 0); | |
2288 | flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation, | |
2289 | (bfd_byte *) data, (bfd_vma) octets, | |
2290 | is_weak_undef, error_message); | |
2291 | ||
2292 | if (flag == bfd_reloc_dangerous) | |
2293 | { | |
2294 | /* Add the symbol name to the error message. */ | |
2295 | if (! *error_message) | |
2296 | *error_message = ""; | |
2297 | *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)", | |
2298 | strlen (symbol->name) + 17, | |
70961b9d AM |
2299 | symbol->name, |
2300 | (unsigned long) reloc_entry->addend); | |
e0001a05 NC |
2301 | } |
2302 | ||
2303 | return flag; | |
2304 | } | |
2305 | ||
2306 | ||
2307 | /* Set up an entry in the procedure linkage table. */ | |
2308 | ||
2309 | static bfd_vma | |
f0e6fdb2 | 2310 | elf_xtensa_create_plt_entry (struct bfd_link_info *info, |
7fa3d080 BW |
2311 | bfd *output_bfd, |
2312 | unsigned reloc_index) | |
e0001a05 NC |
2313 | { |
2314 | asection *splt, *sgotplt; | |
2315 | bfd_vma plt_base, got_base; | |
2316 | bfd_vma code_offset, lit_offset; | |
2317 | int chunk; | |
2318 | ||
2319 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
2320 | splt = elf_xtensa_get_plt_section (info, chunk); |
2321 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
2322 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
2323 | ||
2324 | plt_base = splt->output_section->vma + splt->output_offset; | |
2325 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
2326 | ||
2327 | lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4; | |
2328 | code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE; | |
2329 | ||
2330 | /* Fill in the literal entry. This is the offset of the dynamic | |
2331 | relocation entry. */ | |
2332 | bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela), | |
2333 | sgotplt->contents + lit_offset); | |
2334 | ||
2335 | /* Fill in the entry in the procedure linkage table. */ | |
2336 | memcpy (splt->contents + code_offset, | |
2337 | (bfd_big_endian (output_bfd) | |
2338 | ? elf_xtensa_be_plt_entry | |
2339 | : elf_xtensa_le_plt_entry), | |
2340 | PLT_ENTRY_SIZE); | |
2341 | bfd_put_16 (output_bfd, l32r_offset (got_base + 0, | |
2342 | plt_base + code_offset + 3), | |
2343 | splt->contents + code_offset + 4); | |
2344 | bfd_put_16 (output_bfd, l32r_offset (got_base + 4, | |
2345 | plt_base + code_offset + 6), | |
2346 | splt->contents + code_offset + 7); | |
2347 | bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset, | |
2348 | plt_base + code_offset + 9), | |
2349 | splt->contents + code_offset + 10); | |
2350 | ||
2351 | return plt_base + code_offset; | |
2352 | } | |
2353 | ||
2354 | ||
28dbbc02 BW |
2355 | static bfd_boolean get_indirect_call_dest_reg (xtensa_opcode, unsigned *); |
2356 | ||
2357 | static bfd_boolean | |
2358 | replace_tls_insn (Elf_Internal_Rela *rel, | |
2359 | bfd *abfd, | |
2360 | asection *input_section, | |
2361 | bfd_byte *contents, | |
2362 | bfd_boolean is_ld_model, | |
2363 | char **error_message) | |
2364 | { | |
2365 | static xtensa_insnbuf ibuff = NULL; | |
2366 | static xtensa_insnbuf sbuff = NULL; | |
2367 | xtensa_isa isa = xtensa_default_isa; | |
2368 | xtensa_format fmt; | |
2369 | xtensa_opcode old_op, new_op; | |
2370 | bfd_size_type input_size; | |
2371 | int r_type; | |
2372 | unsigned dest_reg, src_reg; | |
2373 | ||
2374 | if (ibuff == NULL) | |
2375 | { | |
2376 | ibuff = xtensa_insnbuf_alloc (isa); | |
2377 | sbuff = xtensa_insnbuf_alloc (isa); | |
2378 | } | |
2379 | ||
2380 | input_size = bfd_get_section_limit (abfd, input_section); | |
2381 | ||
2382 | /* Read the instruction into a buffer and decode the opcode. */ | |
2383 | xtensa_insnbuf_from_chars (isa, ibuff, contents + rel->r_offset, | |
2384 | input_size - rel->r_offset); | |
2385 | fmt = xtensa_format_decode (isa, ibuff); | |
2386 | if (fmt == XTENSA_UNDEFINED) | |
2387 | { | |
2388 | *error_message = "cannot decode instruction format"; | |
2389 | return FALSE; | |
2390 | } | |
2391 | ||
2392 | BFD_ASSERT (xtensa_format_num_slots (isa, fmt) == 1); | |
2393 | xtensa_format_get_slot (isa, fmt, 0, ibuff, sbuff); | |
2394 | ||
2395 | old_op = xtensa_opcode_decode (isa, fmt, 0, sbuff); | |
2396 | if (old_op == XTENSA_UNDEFINED) | |
2397 | { | |
2398 | *error_message = "cannot decode instruction opcode"; | |
2399 | return FALSE; | |
2400 | } | |
2401 | ||
2402 | r_type = ELF32_R_TYPE (rel->r_info); | |
2403 | switch (r_type) | |
2404 | { | |
2405 | case R_XTENSA_TLS_FUNC: | |
2406 | case R_XTENSA_TLS_ARG: | |
2407 | if (old_op != get_l32r_opcode () | |
2408 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2409 | sbuff, &dest_reg) != 0) | |
2410 | { | |
2411 | *error_message = "cannot extract L32R destination for TLS access"; | |
2412 | return FALSE; | |
2413 | } | |
2414 | break; | |
2415 | ||
2416 | case R_XTENSA_TLS_CALL: | |
2417 | if (! get_indirect_call_dest_reg (old_op, &dest_reg) | |
2418 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2419 | sbuff, &src_reg) != 0) | |
2420 | { | |
2421 | *error_message = "cannot extract CALLXn operands for TLS access"; | |
2422 | return FALSE; | |
2423 | } | |
2424 | break; | |
2425 | ||
2426 | default: | |
2427 | abort (); | |
2428 | } | |
2429 | ||
2430 | if (is_ld_model) | |
2431 | { | |
2432 | switch (r_type) | |
2433 | { | |
2434 | case R_XTENSA_TLS_FUNC: | |
2435 | case R_XTENSA_TLS_ARG: | |
2436 | /* Change the instruction to a NOP (or "OR a1, a1, a1" for older | |
2437 | versions of Xtensa). */ | |
2438 | new_op = xtensa_opcode_lookup (isa, "nop"); | |
2439 | if (new_op == XTENSA_UNDEFINED) | |
2440 | { | |
2441 | new_op = xtensa_opcode_lookup (isa, "or"); | |
2442 | if (new_op == XTENSA_UNDEFINED | |
2443 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2444 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2445 | sbuff, 1) != 0 | |
2446 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2447 | sbuff, 1) != 0 | |
2448 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2449 | sbuff, 1) != 0) | |
2450 | { | |
2451 | *error_message = "cannot encode OR for TLS access"; | |
2452 | return FALSE; | |
2453 | } | |
2454 | } | |
2455 | else | |
2456 | { | |
2457 | if (xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0) | |
2458 | { | |
2459 | *error_message = "cannot encode NOP for TLS access"; | |
2460 | return FALSE; | |
2461 | } | |
2462 | } | |
2463 | break; | |
2464 | ||
2465 | case R_XTENSA_TLS_CALL: | |
2466 | /* Read THREADPTR into the CALLX's return value register. */ | |
2467 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2468 | if (new_op == XTENSA_UNDEFINED | |
2469 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2470 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2471 | sbuff, dest_reg + 2) != 0) | |
2472 | { | |
2473 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2474 | return FALSE; | |
2475 | } | |
2476 | break; | |
2477 | } | |
2478 | } | |
2479 | else | |
2480 | { | |
2481 | switch (r_type) | |
2482 | { | |
2483 | case R_XTENSA_TLS_FUNC: | |
2484 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2485 | if (new_op == XTENSA_UNDEFINED | |
2486 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2487 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2488 | sbuff, dest_reg) != 0) | |
2489 | { | |
2490 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2491 | return FALSE; | |
2492 | } | |
2493 | break; | |
2494 | ||
2495 | case R_XTENSA_TLS_ARG: | |
2496 | /* Nothing to do. Keep the original L32R instruction. */ | |
2497 | return TRUE; | |
2498 | ||
2499 | case R_XTENSA_TLS_CALL: | |
2500 | /* Add the CALLX's src register (holding the THREADPTR value) | |
2501 | to the first argument register (holding the offset) and put | |
2502 | the result in the CALLX's return value register. */ | |
2503 | new_op = xtensa_opcode_lookup (isa, "add"); | |
2504 | if (new_op == XTENSA_UNDEFINED | |
2505 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2506 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2507 | sbuff, dest_reg + 2) != 0 | |
2508 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2509 | sbuff, dest_reg + 2) != 0 | |
2510 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2511 | sbuff, src_reg) != 0) | |
2512 | { | |
2513 | *error_message = "cannot encode ADD for TLS access"; | |
2514 | return FALSE; | |
2515 | } | |
2516 | break; | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | xtensa_format_set_slot (isa, fmt, 0, ibuff, sbuff); | |
2521 | xtensa_insnbuf_to_chars (isa, ibuff, contents + rel->r_offset, | |
2522 | input_size - rel->r_offset); | |
2523 | ||
2524 | return TRUE; | |
2525 | } | |
2526 | ||
2527 | ||
2528 | #define IS_XTENSA_TLS_RELOC(R_TYPE) \ | |
2529 | ((R_TYPE) == R_XTENSA_TLSDESC_FN \ | |
2530 | || (R_TYPE) == R_XTENSA_TLSDESC_ARG \ | |
2531 | || (R_TYPE) == R_XTENSA_TLS_DTPOFF \ | |
2532 | || (R_TYPE) == R_XTENSA_TLS_TPOFF \ | |
2533 | || (R_TYPE) == R_XTENSA_TLS_FUNC \ | |
2534 | || (R_TYPE) == R_XTENSA_TLS_ARG \ | |
2535 | || (R_TYPE) == R_XTENSA_TLS_CALL) | |
2536 | ||
e0001a05 | 2537 | /* Relocate an Xtensa ELF section. This is invoked by the linker for |
1049f94e | 2538 | both relocatable and final links. */ |
e0001a05 NC |
2539 | |
2540 | static bfd_boolean | |
7fa3d080 BW |
2541 | elf_xtensa_relocate_section (bfd *output_bfd, |
2542 | struct bfd_link_info *info, | |
2543 | bfd *input_bfd, | |
2544 | asection *input_section, | |
2545 | bfd_byte *contents, | |
2546 | Elf_Internal_Rela *relocs, | |
2547 | Elf_Internal_Sym *local_syms, | |
2548 | asection **local_sections) | |
e0001a05 | 2549 | { |
f0e6fdb2 | 2550 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
2551 | Elf_Internal_Shdr *symtab_hdr; |
2552 | Elf_Internal_Rela *rel; | |
2553 | Elf_Internal_Rela *relend; | |
2554 | struct elf_link_hash_entry **sym_hashes; | |
88d65ad6 BW |
2555 | property_table_entry *lit_table = 0; |
2556 | int ltblsize = 0; | |
28dbbc02 | 2557 | char *local_got_tls_types; |
e0001a05 | 2558 | char *error_message = NULL; |
43cd72b9 | 2559 | bfd_size_type input_size; |
28dbbc02 | 2560 | int tls_type; |
e0001a05 | 2561 | |
43cd72b9 BW |
2562 | if (!xtensa_default_isa) |
2563 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 2564 | |
28dbbc02 BW |
2565 | BFD_ASSERT (is_xtensa_elf (input_bfd)); |
2566 | ||
f0e6fdb2 | 2567 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
2568 | if (htab == NULL) |
2569 | return FALSE; | |
2570 | ||
e0001a05 NC |
2571 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2572 | sym_hashes = elf_sym_hashes (input_bfd); | |
28dbbc02 | 2573 | local_got_tls_types = elf_xtensa_local_got_tls_type (input_bfd); |
e0001a05 | 2574 | |
88d65ad6 BW |
2575 | if (elf_hash_table (info)->dynamic_sections_created) |
2576 | { | |
2577 | ltblsize = xtensa_read_table_entries (input_bfd, input_section, | |
43cd72b9 BW |
2578 | &lit_table, XTENSA_LIT_SEC_NAME, |
2579 | TRUE); | |
88d65ad6 BW |
2580 | if (ltblsize < 0) |
2581 | return FALSE; | |
2582 | } | |
2583 | ||
43cd72b9 BW |
2584 | input_size = bfd_get_section_limit (input_bfd, input_section); |
2585 | ||
e0001a05 NC |
2586 | rel = relocs; |
2587 | relend = relocs + input_section->reloc_count; | |
2588 | for (; rel < relend; rel++) | |
2589 | { | |
2590 | int r_type; | |
2591 | reloc_howto_type *howto; | |
2592 | unsigned long r_symndx; | |
2593 | struct elf_link_hash_entry *h; | |
2594 | Elf_Internal_Sym *sym; | |
28dbbc02 BW |
2595 | char sym_type; |
2596 | const char *name; | |
e0001a05 NC |
2597 | asection *sec; |
2598 | bfd_vma relocation; | |
2599 | bfd_reloc_status_type r; | |
2600 | bfd_boolean is_weak_undef; | |
2601 | bfd_boolean unresolved_reloc; | |
9b8c98a4 | 2602 | bfd_boolean warned; |
28dbbc02 | 2603 | bfd_boolean dynamic_symbol; |
e0001a05 NC |
2604 | |
2605 | r_type = ELF32_R_TYPE (rel->r_info); | |
2606 | if (r_type == (int) R_XTENSA_GNU_VTINHERIT | |
2607 | || r_type == (int) R_XTENSA_GNU_VTENTRY) | |
2608 | continue; | |
2609 | ||
2610 | if (r_type < 0 || r_type >= (int) R_XTENSA_max) | |
2611 | { | |
2612 | bfd_set_error (bfd_error_bad_value); | |
2613 | return FALSE; | |
2614 | } | |
2615 | howto = &elf_howto_table[r_type]; | |
2616 | ||
2617 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2618 | ||
ab96bf03 AM |
2619 | h = NULL; |
2620 | sym = NULL; | |
2621 | sec = NULL; | |
2622 | is_weak_undef = FALSE; | |
2623 | unresolved_reloc = FALSE; | |
2624 | warned = FALSE; | |
2625 | ||
2626 | if (howto->partial_inplace && !info->relocatable) | |
2627 | { | |
2628 | /* Because R_XTENSA_32 was made partial_inplace to fix some | |
2629 | problems with DWARF info in partial links, there may be | |
2630 | an addend stored in the contents. Take it out of there | |
2631 | and move it back into the addend field of the reloc. */ | |
2632 | rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2633 | bfd_put_32 (input_bfd, 0, contents + rel->r_offset); | |
2634 | } | |
2635 | ||
2636 | if (r_symndx < symtab_hdr->sh_info) | |
2637 | { | |
2638 | sym = local_syms + r_symndx; | |
28dbbc02 | 2639 | sym_type = ELF32_ST_TYPE (sym->st_info); |
ab96bf03 AM |
2640 | sec = local_sections[r_symndx]; |
2641 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2642 | } | |
2643 | else | |
2644 | { | |
2645 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2646 | r_symndx, symtab_hdr, sym_hashes, | |
2647 | h, sec, relocation, | |
2648 | unresolved_reloc, warned); | |
2649 | ||
2650 | if (relocation == 0 | |
2651 | && !unresolved_reloc | |
2652 | && h->root.type == bfd_link_hash_undefweak) | |
2653 | is_weak_undef = TRUE; | |
28dbbc02 BW |
2654 | |
2655 | sym_type = h->type; | |
ab96bf03 AM |
2656 | } |
2657 | ||
2658 | if (sec != NULL && elf_discarded_section (sec)) | |
2659 | { | |
2660 | /* For relocs against symbols from removed linkonce sections, | |
2661 | or sections discarded by a linker script, we just want the | |
2662 | section contents zeroed. Avoid any special processing. */ | |
2663 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2664 | rel->r_info = 0; | |
2665 | rel->r_addend = 0; | |
2666 | continue; | |
2667 | } | |
2668 | ||
1049f94e | 2669 | if (info->relocatable) |
e0001a05 | 2670 | { |
43cd72b9 | 2671 | /* This is a relocatable link. |
e0001a05 NC |
2672 | 1) If the reloc is against a section symbol, adjust |
2673 | according to the output section. | |
2674 | 2) If there is a new target for this relocation, | |
2675 | the new target will be in the same output section. | |
2676 | We adjust the relocation by the output section | |
2677 | difference. */ | |
2678 | ||
2679 | if (relaxing_section) | |
2680 | { | |
2681 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2682 | if (!do_fix_for_relocatable_link (rel, input_bfd, input_section, |
2683 | contents)) | |
2684 | return FALSE; | |
e0001a05 NC |
2685 | } |
2686 | ||
43cd72b9 | 2687 | if (r_type == R_XTENSA_ASM_SIMPLIFY) |
e0001a05 | 2688 | { |
91d6fa6a | 2689 | error_message = NULL; |
e0001a05 NC |
2690 | /* Convert ASM_SIMPLIFY into the simpler relocation |
2691 | so that they never escape a relaxing link. */ | |
43cd72b9 BW |
2692 | r = contract_asm_expansion (contents, input_size, rel, |
2693 | &error_message); | |
2694 | if (r != bfd_reloc_ok) | |
2695 | { | |
2696 | if (!((*info->callbacks->reloc_dangerous) | |
2697 | (info, error_message, input_bfd, input_section, | |
2698 | rel->r_offset))) | |
2699 | return FALSE; | |
2700 | } | |
e0001a05 NC |
2701 | r_type = ELF32_R_TYPE (rel->r_info); |
2702 | } | |
2703 | ||
1049f94e | 2704 | /* This is a relocatable link, so we don't have to change |
e0001a05 NC |
2705 | anything unless the reloc is against a section symbol, |
2706 | in which case we have to adjust according to where the | |
2707 | section symbol winds up in the output section. */ | |
2708 | if (r_symndx < symtab_hdr->sh_info) | |
2709 | { | |
2710 | sym = local_syms + r_symndx; | |
2711 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2712 | { | |
2713 | sec = local_sections[r_symndx]; | |
2714 | rel->r_addend += sec->output_offset + sym->st_value; | |
2715 | } | |
2716 | } | |
2717 | ||
2718 | /* If there is an addend with a partial_inplace howto, | |
2719 | then move the addend to the contents. This is a hack | |
1049f94e | 2720 | to work around problems with DWARF in relocatable links |
e0001a05 NC |
2721 | with some previous version of BFD. Now we can't easily get |
2722 | rid of the hack without breaking backward compatibility.... */ | |
2723 | if (rel->r_addend) | |
2724 | { | |
2725 | howto = &elf_howto_table[r_type]; | |
2726 | if (howto->partial_inplace) | |
2727 | { | |
2728 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2729 | rel->r_addend, contents, | |
2730 | rel->r_offset, FALSE, | |
2731 | &error_message); | |
2732 | if (r != bfd_reloc_ok) | |
2733 | { | |
2734 | if (!((*info->callbacks->reloc_dangerous) | |
2735 | (info, error_message, input_bfd, input_section, | |
2736 | rel->r_offset))) | |
2737 | return FALSE; | |
2738 | } | |
2739 | rel->r_addend = 0; | |
2740 | } | |
2741 | } | |
2742 | ||
1049f94e | 2743 | /* Done with work for relocatable link; continue with next reloc. */ |
e0001a05 NC |
2744 | continue; |
2745 | } | |
2746 | ||
2747 | /* This is a final link. */ | |
2748 | ||
e0001a05 NC |
2749 | if (relaxing_section) |
2750 | { | |
2751 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2752 | do_fix_for_final_link (rel, input_bfd, input_section, contents, |
2753 | &relocation); | |
e0001a05 NC |
2754 | } |
2755 | ||
2756 | /* Sanity check the address. */ | |
43cd72b9 | 2757 | if (rel->r_offset >= input_size |
e0001a05 NC |
2758 | && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE) |
2759 | { | |
43cd72b9 BW |
2760 | (*_bfd_error_handler) |
2761 | (_("%B(%A+0x%lx): relocation offset out of range (size=0x%x)"), | |
2762 | input_bfd, input_section, rel->r_offset, input_size); | |
e0001a05 NC |
2763 | bfd_set_error (bfd_error_bad_value); |
2764 | return FALSE; | |
2765 | } | |
2766 | ||
28dbbc02 BW |
2767 | if (h != NULL) |
2768 | name = h->root.root.string; | |
2769 | else | |
e0001a05 | 2770 | { |
28dbbc02 BW |
2771 | name = (bfd_elf_string_from_elf_section |
2772 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2773 | if (name == NULL || *name == '\0') | |
2774 | name = bfd_section_name (input_bfd, sec); | |
2775 | } | |
e0001a05 | 2776 | |
28dbbc02 BW |
2777 | if (r_symndx != 0 |
2778 | && r_type != R_XTENSA_NONE | |
2779 | && (h == NULL | |
2780 | || h->root.type == bfd_link_hash_defined | |
2781 | || h->root.type == bfd_link_hash_defweak) | |
2782 | && IS_XTENSA_TLS_RELOC (r_type) != (sym_type == STT_TLS)) | |
2783 | { | |
2784 | (*_bfd_error_handler) | |
2785 | ((sym_type == STT_TLS | |
2786 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") | |
2787 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), | |
2788 | input_bfd, | |
2789 | input_section, | |
2790 | (long) rel->r_offset, | |
2791 | howto->name, | |
2792 | name); | |
2793 | } | |
2794 | ||
2795 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); | |
2796 | ||
2797 | tls_type = GOT_UNKNOWN; | |
2798 | if (h) | |
2799 | tls_type = elf_xtensa_hash_entry (h)->tls_type; | |
2800 | else if (local_got_tls_types) | |
2801 | tls_type = local_got_tls_types [r_symndx]; | |
2802 | ||
2803 | switch (r_type) | |
2804 | { | |
2805 | case R_XTENSA_32: | |
2806 | case R_XTENSA_PLT: | |
2807 | if (elf_hash_table (info)->dynamic_sections_created | |
2808 | && (input_section->flags & SEC_ALLOC) != 0 | |
2809 | && (dynamic_symbol || info->shared)) | |
e0001a05 NC |
2810 | { |
2811 | Elf_Internal_Rela outrel; | |
2812 | bfd_byte *loc; | |
2813 | asection *srel; | |
2814 | ||
2815 | if (dynamic_symbol && r_type == R_XTENSA_PLT) | |
f0e6fdb2 | 2816 | srel = htab->srelplt; |
e0001a05 | 2817 | else |
f0e6fdb2 | 2818 | srel = htab->srelgot; |
e0001a05 NC |
2819 | |
2820 | BFD_ASSERT (srel != NULL); | |
2821 | ||
2822 | outrel.r_offset = | |
2823 | _bfd_elf_section_offset (output_bfd, info, | |
2824 | input_section, rel->r_offset); | |
2825 | ||
2826 | if ((outrel.r_offset | 1) == (bfd_vma) -1) | |
2827 | memset (&outrel, 0, sizeof outrel); | |
2828 | else | |
2829 | { | |
f0578e28 BW |
2830 | outrel.r_offset += (input_section->output_section->vma |
2831 | + input_section->output_offset); | |
e0001a05 | 2832 | |
88d65ad6 BW |
2833 | /* Complain if the relocation is in a read-only section |
2834 | and not in a literal pool. */ | |
2835 | if ((input_section->flags & SEC_READONLY) != 0 | |
2836 | && !elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
3ba3bc8c | 2837 | outrel.r_offset)) |
88d65ad6 BW |
2838 | { |
2839 | error_message = | |
2840 | _("dynamic relocation in read-only section"); | |
2841 | if (!((*info->callbacks->reloc_dangerous) | |
2842 | (info, error_message, input_bfd, input_section, | |
2843 | rel->r_offset))) | |
2844 | return FALSE; | |
2845 | } | |
2846 | ||
e0001a05 NC |
2847 | if (dynamic_symbol) |
2848 | { | |
2849 | outrel.r_addend = rel->r_addend; | |
2850 | rel->r_addend = 0; | |
2851 | ||
2852 | if (r_type == R_XTENSA_32) | |
2853 | { | |
2854 | outrel.r_info = | |
2855 | ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT); | |
2856 | relocation = 0; | |
2857 | } | |
2858 | else /* r_type == R_XTENSA_PLT */ | |
2859 | { | |
2860 | outrel.r_info = | |
2861 | ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT); | |
2862 | ||
2863 | /* Create the PLT entry and set the initial | |
2864 | contents of the literal entry to the address of | |
2865 | the PLT entry. */ | |
43cd72b9 | 2866 | relocation = |
f0e6fdb2 | 2867 | elf_xtensa_create_plt_entry (info, output_bfd, |
e0001a05 NC |
2868 | srel->reloc_count); |
2869 | } | |
2870 | unresolved_reloc = FALSE; | |
2871 | } | |
2872 | else | |
2873 | { | |
2874 | /* Generate a RELATIVE relocation. */ | |
2875 | outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE); | |
2876 | outrel.r_addend = 0; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | loc = (srel->contents | |
2881 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2882 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2883 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
eea6121a | 2884 | <= srel->size); |
e0001a05 | 2885 | } |
d9ab3f29 BW |
2886 | else if (r_type == R_XTENSA_ASM_EXPAND && dynamic_symbol) |
2887 | { | |
2888 | /* This should only happen for non-PIC code, which is not | |
2889 | supposed to be used on systems with dynamic linking. | |
2890 | Just ignore these relocations. */ | |
2891 | continue; | |
2892 | } | |
28dbbc02 BW |
2893 | break; |
2894 | ||
2895 | case R_XTENSA_TLS_TPOFF: | |
2896 | /* Switch to LE model for local symbols in an executable. */ | |
2897 | if (! info->shared && ! dynamic_symbol) | |
2898 | { | |
2899 | relocation = tpoff (info, relocation); | |
2900 | break; | |
2901 | } | |
2902 | /* fall through */ | |
2903 | ||
2904 | case R_XTENSA_TLSDESC_FN: | |
2905 | case R_XTENSA_TLSDESC_ARG: | |
2906 | { | |
2907 | if (r_type == R_XTENSA_TLSDESC_FN) | |
2908 | { | |
2909 | if (! info->shared || (tls_type & GOT_TLS_IE) != 0) | |
2910 | r_type = R_XTENSA_NONE; | |
2911 | } | |
2912 | else if (r_type == R_XTENSA_TLSDESC_ARG) | |
2913 | { | |
2914 | if (info->shared) | |
2915 | { | |
2916 | if ((tls_type & GOT_TLS_IE) != 0) | |
2917 | r_type = R_XTENSA_TLS_TPOFF; | |
2918 | } | |
2919 | else | |
2920 | { | |
2921 | r_type = R_XTENSA_TLS_TPOFF; | |
2922 | if (! dynamic_symbol) | |
2923 | { | |
2924 | relocation = tpoff (info, relocation); | |
2925 | break; | |
2926 | } | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | if (r_type == R_XTENSA_NONE) | |
2931 | /* Nothing to do here; skip to the next reloc. */ | |
2932 | continue; | |
2933 | ||
2934 | if (! elf_hash_table (info)->dynamic_sections_created) | |
2935 | { | |
2936 | error_message = | |
2937 | _("TLS relocation invalid without dynamic sections"); | |
2938 | if (!((*info->callbacks->reloc_dangerous) | |
2939 | (info, error_message, input_bfd, input_section, | |
2940 | rel->r_offset))) | |
2941 | return FALSE; | |
2942 | } | |
2943 | else | |
2944 | { | |
2945 | Elf_Internal_Rela outrel; | |
2946 | bfd_byte *loc; | |
2947 | asection *srel = htab->srelgot; | |
2948 | int indx; | |
2949 | ||
2950 | outrel.r_offset = (input_section->output_section->vma | |
2951 | + input_section->output_offset | |
2952 | + rel->r_offset); | |
2953 | ||
2954 | /* Complain if the relocation is in a read-only section | |
2955 | and not in a literal pool. */ | |
2956 | if ((input_section->flags & SEC_READONLY) != 0 | |
2957 | && ! elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
2958 | outrel.r_offset)) | |
2959 | { | |
2960 | error_message = | |
2961 | _("dynamic relocation in read-only section"); | |
2962 | if (!((*info->callbacks->reloc_dangerous) | |
2963 | (info, error_message, input_bfd, input_section, | |
2964 | rel->r_offset))) | |
2965 | return FALSE; | |
2966 | } | |
2967 | ||
2968 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2969 | if (indx == 0) | |
2970 | outrel.r_addend = relocation - dtpoff_base (info); | |
2971 | else | |
2972 | outrel.r_addend = 0; | |
2973 | rel->r_addend = 0; | |
2974 | ||
2975 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
2976 | relocation = 0; | |
2977 | unresolved_reloc = FALSE; | |
2978 | ||
2979 | BFD_ASSERT (srel); | |
2980 | loc = (srel->contents | |
2981 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2982 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2983 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
2984 | <= srel->size); | |
2985 | } | |
2986 | } | |
2987 | break; | |
2988 | ||
2989 | case R_XTENSA_TLS_DTPOFF: | |
2990 | if (! info->shared) | |
2991 | /* Switch from LD model to LE model. */ | |
2992 | relocation = tpoff (info, relocation); | |
2993 | else | |
2994 | relocation -= dtpoff_base (info); | |
2995 | break; | |
2996 | ||
2997 | case R_XTENSA_TLS_FUNC: | |
2998 | case R_XTENSA_TLS_ARG: | |
2999 | case R_XTENSA_TLS_CALL: | |
3000 | /* Check if optimizing to IE or LE model. */ | |
3001 | if ((tls_type & GOT_TLS_IE) != 0) | |
3002 | { | |
3003 | bfd_boolean is_ld_model = | |
3004 | (h && elf_xtensa_hash_entry (h) == htab->tlsbase); | |
3005 | if (! replace_tls_insn (rel, input_bfd, input_section, contents, | |
3006 | is_ld_model, &error_message)) | |
3007 | { | |
3008 | if (!((*info->callbacks->reloc_dangerous) | |
3009 | (info, error_message, input_bfd, input_section, | |
3010 | rel->r_offset))) | |
3011 | return FALSE; | |
3012 | } | |
3013 | ||
3014 | if (r_type != R_XTENSA_TLS_ARG || is_ld_model) | |
3015 | { | |
3016 | /* Skip subsequent relocations on the same instruction. */ | |
3017 | while (rel + 1 < relend && rel[1].r_offset == rel->r_offset) | |
3018 | rel++; | |
3019 | } | |
3020 | } | |
3021 | continue; | |
3022 | ||
3023 | default: | |
3024 | if (elf_hash_table (info)->dynamic_sections_created | |
3025 | && dynamic_symbol && (is_operand_relocation (r_type) | |
3026 | || r_type == R_XTENSA_32_PCREL)) | |
3027 | { | |
3028 | error_message = | |
3029 | vsprint_msg ("invalid relocation for dynamic symbol", ": %s", | |
3030 | strlen (name) + 2, name); | |
3031 | if (!((*info->callbacks->reloc_dangerous) | |
3032 | (info, error_message, input_bfd, input_section, | |
3033 | rel->r_offset))) | |
3034 | return FALSE; | |
3035 | continue; | |
3036 | } | |
3037 | break; | |
e0001a05 NC |
3038 | } |
3039 | ||
3040 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
3041 | because such sections are not SEC_ALLOC and thus ld.so will | |
3042 | not process them. */ | |
3043 | if (unresolved_reloc | |
3044 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 3045 | && h->def_dynamic)) |
bf1747de BW |
3046 | { |
3047 | (*_bfd_error_handler) | |
3048 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
3049 | input_bfd, | |
3050 | input_section, | |
3051 | (long) rel->r_offset, | |
3052 | howto->name, | |
28dbbc02 | 3053 | name); |
bf1747de BW |
3054 | return FALSE; |
3055 | } | |
e0001a05 | 3056 | |
28dbbc02 BW |
3057 | /* TLS optimizations may have changed r_type; update "howto". */ |
3058 | howto = &elf_howto_table[r_type]; | |
3059 | ||
e0001a05 NC |
3060 | /* There's no point in calling bfd_perform_relocation here. |
3061 | Just go directly to our "special function". */ | |
3062 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
3063 | relocation + rel->r_addend, | |
3064 | contents, rel->r_offset, is_weak_undef, | |
3065 | &error_message); | |
43cd72b9 | 3066 | |
9b8c98a4 | 3067 | if (r != bfd_reloc_ok && !warned) |
e0001a05 | 3068 | { |
43cd72b9 | 3069 | BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other); |
7fa3d080 | 3070 | BFD_ASSERT (error_message != NULL); |
e0001a05 | 3071 | |
28dbbc02 BW |
3072 | if (rel->r_addend == 0) |
3073 | error_message = vsprint_msg (error_message, ": %s", | |
3074 | strlen (name) + 2, name); | |
e0001a05 | 3075 | else |
28dbbc02 BW |
3076 | error_message = vsprint_msg (error_message, ": (%s+0x%x)", |
3077 | strlen (name) + 22, | |
3078 | name, (int) rel->r_addend); | |
43cd72b9 | 3079 | |
e0001a05 NC |
3080 | if (!((*info->callbacks->reloc_dangerous) |
3081 | (info, error_message, input_bfd, input_section, | |
3082 | rel->r_offset))) | |
3083 | return FALSE; | |
3084 | } | |
3085 | } | |
3086 | ||
88d65ad6 BW |
3087 | if (lit_table) |
3088 | free (lit_table); | |
3089 | ||
3ba3bc8c BW |
3090 | input_section->reloc_done = TRUE; |
3091 | ||
e0001a05 NC |
3092 | return TRUE; |
3093 | } | |
3094 | ||
3095 | ||
3096 | /* Finish up dynamic symbol handling. There's not much to do here since | |
3097 | the PLT and GOT entries are all set up by relocate_section. */ | |
3098 | ||
3099 | static bfd_boolean | |
7fa3d080 BW |
3100 | elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
3101 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3102 | struct elf_link_hash_entry *h, | |
3103 | Elf_Internal_Sym *sym) | |
e0001a05 | 3104 | { |
bf1747de | 3105 | if (h->needs_plt && !h->def_regular) |
e0001a05 NC |
3106 | { |
3107 | /* Mark the symbol as undefined, rather than as defined in | |
3108 | the .plt section. Leave the value alone. */ | |
3109 | sym->st_shndx = SHN_UNDEF; | |
bf1747de BW |
3110 | /* If the symbol is weak, we do need to clear the value. |
3111 | Otherwise, the PLT entry would provide a definition for | |
3112 | the symbol even if the symbol wasn't defined anywhere, | |
3113 | and so the symbol would never be NULL. */ | |
3114 | if (!h->ref_regular_nonweak) | |
3115 | sym->st_value = 0; | |
e0001a05 NC |
3116 | } |
3117 | ||
3118 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3119 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 3120 | || h == elf_hash_table (info)->hgot) |
e0001a05 NC |
3121 | sym->st_shndx = SHN_ABS; |
3122 | ||
3123 | return TRUE; | |
3124 | } | |
3125 | ||
3126 | ||
3127 | /* Combine adjacent literal table entries in the output. Adjacent | |
3128 | entries within each input section may have been removed during | |
3129 | relaxation, but we repeat the process here, even though it's too late | |
3130 | to shrink the output section, because it's important to minimize the | |
3131 | number of literal table entries to reduce the start-up work for the | |
3132 | runtime linker. Returns the number of remaining table entries or -1 | |
3133 | on error. */ | |
3134 | ||
3135 | static int | |
7fa3d080 BW |
3136 | elf_xtensa_combine_prop_entries (bfd *output_bfd, |
3137 | asection *sxtlit, | |
3138 | asection *sgotloc) | |
e0001a05 | 3139 | { |
e0001a05 NC |
3140 | bfd_byte *contents; |
3141 | property_table_entry *table; | |
e901de89 | 3142 | bfd_size_type section_size, sgotloc_size; |
e0001a05 NC |
3143 | bfd_vma offset; |
3144 | int n, m, num; | |
3145 | ||
eea6121a | 3146 | section_size = sxtlit->size; |
e0001a05 NC |
3147 | BFD_ASSERT (section_size % 8 == 0); |
3148 | num = section_size / 8; | |
3149 | ||
eea6121a | 3150 | sgotloc_size = sgotloc->size; |
e901de89 | 3151 | if (sgotloc_size != section_size) |
b536dc1e BW |
3152 | { |
3153 | (*_bfd_error_handler) | |
43cd72b9 | 3154 | (_("internal inconsistency in size of .got.loc section")); |
b536dc1e BW |
3155 | return -1; |
3156 | } | |
e901de89 | 3157 | |
eea6121a AM |
3158 | table = bfd_malloc (num * sizeof (property_table_entry)); |
3159 | if (table == 0) | |
e0001a05 NC |
3160 | return -1; |
3161 | ||
3162 | /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this | |
3163 | propagates to the output section, where it doesn't really apply and | |
eea6121a | 3164 | where it breaks the following call to bfd_malloc_and_get_section. */ |
e901de89 | 3165 | sxtlit->flags &= ~SEC_IN_MEMORY; |
e0001a05 | 3166 | |
eea6121a AM |
3167 | if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents)) |
3168 | { | |
3169 | if (contents != 0) | |
3170 | free (contents); | |
3171 | free (table); | |
3172 | return -1; | |
3173 | } | |
e0001a05 NC |
3174 | |
3175 | /* There should never be any relocations left at this point, so this | |
3176 | is quite a bit easier than what is done during relaxation. */ | |
3177 | ||
3178 | /* Copy the raw contents into a property table array and sort it. */ | |
3179 | offset = 0; | |
3180 | for (n = 0; n < num; n++) | |
3181 | { | |
3182 | table[n].address = bfd_get_32 (output_bfd, &contents[offset]); | |
3183 | table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]); | |
3184 | offset += 8; | |
3185 | } | |
3186 | qsort (table, num, sizeof (property_table_entry), property_table_compare); | |
3187 | ||
3188 | for (n = 0; n < num; n++) | |
3189 | { | |
91d6fa6a | 3190 | bfd_boolean remove_entry = FALSE; |
e0001a05 NC |
3191 | |
3192 | if (table[n].size == 0) | |
91d6fa6a NC |
3193 | remove_entry = TRUE; |
3194 | else if (n > 0 | |
3195 | && (table[n-1].address + table[n-1].size == table[n].address)) | |
e0001a05 NC |
3196 | { |
3197 | table[n-1].size += table[n].size; | |
91d6fa6a | 3198 | remove_entry = TRUE; |
e0001a05 NC |
3199 | } |
3200 | ||
91d6fa6a | 3201 | if (remove_entry) |
e0001a05 NC |
3202 | { |
3203 | for (m = n; m < num - 1; m++) | |
3204 | { | |
3205 | table[m].address = table[m+1].address; | |
3206 | table[m].size = table[m+1].size; | |
3207 | } | |
3208 | ||
3209 | n--; | |
3210 | num--; | |
3211 | } | |
3212 | } | |
3213 | ||
3214 | /* Copy the data back to the raw contents. */ | |
3215 | offset = 0; | |
3216 | for (n = 0; n < num; n++) | |
3217 | { | |
3218 | bfd_put_32 (output_bfd, table[n].address, &contents[offset]); | |
3219 | bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]); | |
3220 | offset += 8; | |
3221 | } | |
3222 | ||
3223 | /* Clear the removed bytes. */ | |
3224 | if ((bfd_size_type) (num * 8) < section_size) | |
b54d4b07 | 3225 | memset (&contents[num * 8], 0, section_size - num * 8); |
e0001a05 | 3226 | |
e901de89 BW |
3227 | if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0, |
3228 | section_size)) | |
e0001a05 NC |
3229 | return -1; |
3230 | ||
e901de89 BW |
3231 | /* Copy the contents to ".got.loc". */ |
3232 | memcpy (sgotloc->contents, contents, section_size); | |
3233 | ||
e0001a05 | 3234 | free (contents); |
b614a702 | 3235 | free (table); |
e0001a05 NC |
3236 | return num; |
3237 | } | |
3238 | ||
3239 | ||
3240 | /* Finish up the dynamic sections. */ | |
3241 | ||
3242 | static bfd_boolean | |
7fa3d080 BW |
3243 | elf_xtensa_finish_dynamic_sections (bfd *output_bfd, |
3244 | struct bfd_link_info *info) | |
e0001a05 | 3245 | { |
f0e6fdb2 | 3246 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 | 3247 | bfd *dynobj; |
e901de89 | 3248 | asection *sdyn, *srelplt, *sgot, *sxtlit, *sgotloc; |
e0001a05 | 3249 | Elf32_External_Dyn *dyncon, *dynconend; |
d9ab3f29 | 3250 | int num_xtlit_entries = 0; |
e0001a05 NC |
3251 | |
3252 | if (! elf_hash_table (info)->dynamic_sections_created) | |
3253 | return TRUE; | |
3254 | ||
f0e6fdb2 | 3255 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
3256 | if (htab == NULL) |
3257 | return FALSE; | |
3258 | ||
e0001a05 NC |
3259 | dynobj = elf_hash_table (info)->dynobj; |
3260 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3261 | BFD_ASSERT (sdyn != NULL); | |
3262 | ||
3263 | /* Set the first entry in the global offset table to the address of | |
3264 | the dynamic section. */ | |
f0e6fdb2 | 3265 | sgot = htab->sgot; |
e0001a05 NC |
3266 | if (sgot) |
3267 | { | |
eea6121a | 3268 | BFD_ASSERT (sgot->size == 4); |
e0001a05 | 3269 | if (sdyn == NULL) |
7fa3d080 | 3270 | bfd_put_32 (output_bfd, 0, sgot->contents); |
e0001a05 NC |
3271 | else |
3272 | bfd_put_32 (output_bfd, | |
3273 | sdyn->output_section->vma + sdyn->output_offset, | |
3274 | sgot->contents); | |
3275 | } | |
3276 | ||
f0e6fdb2 | 3277 | srelplt = htab->srelplt; |
7fa3d080 | 3278 | if (srelplt && srelplt->size != 0) |
e0001a05 NC |
3279 | { |
3280 | asection *sgotplt, *srelgot, *spltlittbl; | |
3281 | int chunk, plt_chunks, plt_entries; | |
3282 | Elf_Internal_Rela irela; | |
3283 | bfd_byte *loc; | |
3284 | unsigned rtld_reloc; | |
3285 | ||
f0e6fdb2 BW |
3286 | srelgot = htab->srelgot; |
3287 | spltlittbl = htab->spltlittbl; | |
3288 | BFD_ASSERT (srelgot != NULL && spltlittbl != NULL); | |
e0001a05 NC |
3289 | |
3290 | /* Find the first XTENSA_RTLD relocation. Presumably the rest | |
3291 | of them follow immediately after.... */ | |
3292 | for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++) | |
3293 | { | |
3294 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3295 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3296 | if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD) | |
3297 | break; | |
3298 | } | |
3299 | BFD_ASSERT (rtld_reloc < srelgot->reloc_count); | |
3300 | ||
eea6121a | 3301 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
3302 | plt_chunks = |
3303 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
3304 | ||
3305 | for (chunk = 0; chunk < plt_chunks; chunk++) | |
3306 | { | |
3307 | int chunk_entries = 0; | |
3308 | ||
f0e6fdb2 | 3309 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
e0001a05 NC |
3310 | BFD_ASSERT (sgotplt != NULL); |
3311 | ||
3312 | /* Emit special RTLD relocations for the first two entries in | |
3313 | each chunk of the .got.plt section. */ | |
3314 | ||
3315 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3316 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3317 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3318 | irela.r_offset = (sgotplt->output_section->vma | |
3319 | + sgotplt->output_offset); | |
3320 | irela.r_addend = 1; /* tell rtld to set value to resolver function */ | |
3321 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3322 | rtld_reloc += 1; | |
3323 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3324 | ||
3325 | /* Next literal immediately follows the first. */ | |
3326 | loc += sizeof (Elf32_External_Rela); | |
3327 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3328 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3329 | irela.r_offset = (sgotplt->output_section->vma | |
3330 | + sgotplt->output_offset + 4); | |
3331 | /* Tell rtld to set value to object's link map. */ | |
3332 | irela.r_addend = 2; | |
3333 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3334 | rtld_reloc += 1; | |
3335 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3336 | ||
3337 | /* Fill in the literal table. */ | |
3338 | if (chunk < plt_chunks - 1) | |
3339 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
3340 | else | |
3341 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
3342 | ||
eea6121a | 3343 | BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size); |
e0001a05 NC |
3344 | bfd_put_32 (output_bfd, |
3345 | sgotplt->output_section->vma + sgotplt->output_offset, | |
3346 | spltlittbl->contents + (chunk * 8) + 0); | |
3347 | bfd_put_32 (output_bfd, | |
3348 | 8 + (chunk_entries * 4), | |
3349 | spltlittbl->contents + (chunk * 8) + 4); | |
3350 | } | |
3351 | ||
3352 | /* All the dynamic relocations have been emitted at this point. | |
3353 | Make sure the relocation sections are the correct size. */ | |
eea6121a AM |
3354 | if (srelgot->size != (sizeof (Elf32_External_Rela) |
3355 | * srelgot->reloc_count) | |
3356 | || srelplt->size != (sizeof (Elf32_External_Rela) | |
3357 | * srelplt->reloc_count)) | |
e0001a05 NC |
3358 | abort (); |
3359 | ||
3360 | /* The .xt.lit.plt section has just been modified. This must | |
3361 | happen before the code below which combines adjacent literal | |
3362 | table entries, and the .xt.lit.plt contents have to be forced to | |
3363 | the output here. */ | |
3364 | if (! bfd_set_section_contents (output_bfd, | |
3365 | spltlittbl->output_section, | |
3366 | spltlittbl->contents, | |
3367 | spltlittbl->output_offset, | |
eea6121a | 3368 | spltlittbl->size)) |
e0001a05 NC |
3369 | return FALSE; |
3370 | /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */ | |
3371 | spltlittbl->flags &= ~SEC_HAS_CONTENTS; | |
3372 | } | |
3373 | ||
3374 | /* Combine adjacent literal table entries. */ | |
1049f94e | 3375 | BFD_ASSERT (! info->relocatable); |
e901de89 | 3376 | sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit"); |
f0e6fdb2 | 3377 | sgotloc = htab->sgotloc; |
d9ab3f29 BW |
3378 | BFD_ASSERT (sgotloc); |
3379 | if (sxtlit) | |
3380 | { | |
3381 | num_xtlit_entries = | |
3382 | elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc); | |
3383 | if (num_xtlit_entries < 0) | |
3384 | return FALSE; | |
3385 | } | |
e0001a05 NC |
3386 | |
3387 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3388 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
e0001a05 NC |
3389 | for (; dyncon < dynconend; dyncon++) |
3390 | { | |
3391 | Elf_Internal_Dyn dyn; | |
e0001a05 NC |
3392 | |
3393 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3394 | ||
3395 | switch (dyn.d_tag) | |
3396 | { | |
3397 | default: | |
3398 | break; | |
3399 | ||
3400 | case DT_XTENSA_GOT_LOC_SZ: | |
e0001a05 NC |
3401 | dyn.d_un.d_val = num_xtlit_entries; |
3402 | break; | |
3403 | ||
3404 | case DT_XTENSA_GOT_LOC_OFF: | |
e29297b7 | 3405 | dyn.d_un.d_ptr = htab->sgotloc->output_section->vma; |
f0e6fdb2 BW |
3406 | break; |
3407 | ||
e0001a05 | 3408 | case DT_PLTGOT: |
e29297b7 | 3409 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
f0e6fdb2 BW |
3410 | break; |
3411 | ||
e0001a05 | 3412 | case DT_JMPREL: |
e29297b7 | 3413 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
e0001a05 NC |
3414 | break; |
3415 | ||
3416 | case DT_PLTRELSZ: | |
e29297b7 | 3417 | dyn.d_un.d_val = htab->srelplt->output_section->size; |
e0001a05 NC |
3418 | break; |
3419 | ||
3420 | case DT_RELASZ: | |
3421 | /* Adjust RELASZ to not include JMPREL. This matches what | |
3422 | glibc expects and what is done for several other ELF | |
3423 | targets (e.g., i386, alpha), but the "correct" behavior | |
3424 | seems to be unresolved. Since the linker script arranges | |
3425 | for .rela.plt to follow all other relocation sections, we | |
3426 | don't have to worry about changing the DT_RELA entry. */ | |
f0e6fdb2 | 3427 | if (htab->srelplt) |
e29297b7 | 3428 | dyn.d_un.d_val -= htab->srelplt->output_section->size; |
e0001a05 NC |
3429 | break; |
3430 | } | |
3431 | ||
3432 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3433 | } | |
3434 | ||
3435 | return TRUE; | |
3436 | } | |
3437 | ||
3438 | \f | |
3439 | /* Functions for dealing with the e_flags field. */ | |
3440 | ||
3441 | /* Merge backend specific data from an object file to the output | |
3442 | object file when linking. */ | |
3443 | ||
3444 | static bfd_boolean | |
7fa3d080 | 3445 | elf_xtensa_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
e0001a05 NC |
3446 | { |
3447 | unsigned out_mach, in_mach; | |
3448 | flagword out_flag, in_flag; | |
3449 | ||
3450 | /* Check if we have the same endianess. */ | |
3451 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
3452 | return FALSE; | |
3453 | ||
3454 | /* Don't even pretend to support mixed-format linking. */ | |
3455 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
3456 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
3457 | return FALSE; | |
3458 | ||
3459 | out_flag = elf_elfheader (obfd)->e_flags; | |
3460 | in_flag = elf_elfheader (ibfd)->e_flags; | |
3461 | ||
3462 | out_mach = out_flag & EF_XTENSA_MACH; | |
3463 | in_mach = in_flag & EF_XTENSA_MACH; | |
43cd72b9 | 3464 | if (out_mach != in_mach) |
e0001a05 NC |
3465 | { |
3466 | (*_bfd_error_handler) | |
43cd72b9 | 3467 | (_("%B: incompatible machine type. Output is 0x%x. Input is 0x%x"), |
d003868e | 3468 | ibfd, out_mach, in_mach); |
e0001a05 NC |
3469 | bfd_set_error (bfd_error_wrong_format); |
3470 | return FALSE; | |
3471 | } | |
3472 | ||
3473 | if (! elf_flags_init (obfd)) | |
3474 | { | |
3475 | elf_flags_init (obfd) = TRUE; | |
3476 | elf_elfheader (obfd)->e_flags = in_flag; | |
43cd72b9 | 3477 | |
e0001a05 NC |
3478 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
3479 | && bfd_get_arch_info (obfd)->the_default) | |
3480 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
3481 | bfd_get_mach (ibfd)); | |
43cd72b9 | 3482 | |
e0001a05 NC |
3483 | return TRUE; |
3484 | } | |
3485 | ||
43cd72b9 BW |
3486 | if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN)) |
3487 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN); | |
e0001a05 | 3488 | |
43cd72b9 BW |
3489 | if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT)) |
3490 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT); | |
e0001a05 NC |
3491 | |
3492 | return TRUE; | |
3493 | } | |
3494 | ||
3495 | ||
3496 | static bfd_boolean | |
7fa3d080 | 3497 | elf_xtensa_set_private_flags (bfd *abfd, flagword flags) |
e0001a05 NC |
3498 | { |
3499 | BFD_ASSERT (!elf_flags_init (abfd) | |
3500 | || elf_elfheader (abfd)->e_flags == flags); | |
3501 | ||
3502 | elf_elfheader (abfd)->e_flags |= flags; | |
3503 | elf_flags_init (abfd) = TRUE; | |
3504 | ||
3505 | return TRUE; | |
3506 | } | |
3507 | ||
3508 | ||
e0001a05 | 3509 | static bfd_boolean |
7fa3d080 | 3510 | elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg) |
e0001a05 NC |
3511 | { |
3512 | FILE *f = (FILE *) farg; | |
3513 | flagword e_flags = elf_elfheader (abfd)->e_flags; | |
3514 | ||
3515 | fprintf (f, "\nXtensa header:\n"); | |
43cd72b9 | 3516 | if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH) |
e0001a05 NC |
3517 | fprintf (f, "\nMachine = Base\n"); |
3518 | else | |
3519 | fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH); | |
3520 | ||
3521 | fprintf (f, "Insn tables = %s\n", | |
3522 | (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false"); | |
3523 | ||
3524 | fprintf (f, "Literal tables = %s\n", | |
3525 | (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false"); | |
3526 | ||
3527 | return _bfd_elf_print_private_bfd_data (abfd, farg); | |
3528 | } | |
3529 | ||
3530 | ||
3531 | /* Set the right machine number for an Xtensa ELF file. */ | |
3532 | ||
3533 | static bfd_boolean | |
7fa3d080 | 3534 | elf_xtensa_object_p (bfd *abfd) |
e0001a05 NC |
3535 | { |
3536 | int mach; | |
3537 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH; | |
3538 | ||
3539 | switch (arch) | |
3540 | { | |
3541 | case E_XTENSA_MACH: | |
3542 | mach = bfd_mach_xtensa; | |
3543 | break; | |
3544 | default: | |
3545 | return FALSE; | |
3546 | } | |
3547 | ||
3548 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach); | |
3549 | return TRUE; | |
3550 | } | |
3551 | ||
3552 | ||
3553 | /* The final processing done just before writing out an Xtensa ELF object | |
3554 | file. This gets the Xtensa architecture right based on the machine | |
3555 | number. */ | |
3556 | ||
3557 | static void | |
7fa3d080 BW |
3558 | elf_xtensa_final_write_processing (bfd *abfd, |
3559 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
e0001a05 NC |
3560 | { |
3561 | int mach; | |
3562 | unsigned long val; | |
3563 | ||
3564 | switch (mach = bfd_get_mach (abfd)) | |
3565 | { | |
3566 | case bfd_mach_xtensa: | |
3567 | val = E_XTENSA_MACH; | |
3568 | break; | |
3569 | default: | |
3570 | return; | |
3571 | } | |
3572 | ||
3573 | elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH); | |
3574 | elf_elfheader (abfd)->e_flags |= val; | |
3575 | } | |
3576 | ||
3577 | ||
3578 | static enum elf_reloc_type_class | |
7fa3d080 | 3579 | elf_xtensa_reloc_type_class (const Elf_Internal_Rela *rela) |
e0001a05 NC |
3580 | { |
3581 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3582 | { | |
3583 | case R_XTENSA_RELATIVE: | |
3584 | return reloc_class_relative; | |
3585 | case R_XTENSA_JMP_SLOT: | |
3586 | return reloc_class_plt; | |
3587 | default: | |
3588 | return reloc_class_normal; | |
3589 | } | |
3590 | } | |
3591 | ||
3592 | \f | |
3593 | static bfd_boolean | |
7fa3d080 BW |
3594 | elf_xtensa_discard_info_for_section (bfd *abfd, |
3595 | struct elf_reloc_cookie *cookie, | |
3596 | struct bfd_link_info *info, | |
3597 | asection *sec) | |
e0001a05 NC |
3598 | { |
3599 | bfd_byte *contents; | |
e0001a05 | 3600 | bfd_vma offset, actual_offset; |
1d25768e BW |
3601 | bfd_size_type removed_bytes = 0; |
3602 | bfd_size_type entry_size; | |
e0001a05 NC |
3603 | |
3604 | if (sec->output_section | |
3605 | && bfd_is_abs_section (sec->output_section)) | |
3606 | return FALSE; | |
3607 | ||
1d25768e BW |
3608 | if (xtensa_is_proptable_section (sec)) |
3609 | entry_size = 12; | |
3610 | else | |
3611 | entry_size = 8; | |
3612 | ||
a3ef2d63 | 3613 | if (sec->size == 0 || sec->size % entry_size != 0) |
1d25768e BW |
3614 | return FALSE; |
3615 | ||
e0001a05 NC |
3616 | contents = retrieve_contents (abfd, sec, info->keep_memory); |
3617 | if (!contents) | |
3618 | return FALSE; | |
3619 | ||
3620 | cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory); | |
3621 | if (!cookie->rels) | |
3622 | { | |
3623 | release_contents (sec, contents); | |
3624 | return FALSE; | |
3625 | } | |
3626 | ||
1d25768e BW |
3627 | /* Sort the relocations. They should already be in order when |
3628 | relaxation is enabled, but it might not be. */ | |
3629 | qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
3630 | internal_reloc_compare); | |
3631 | ||
e0001a05 NC |
3632 | cookie->rel = cookie->rels; |
3633 | cookie->relend = cookie->rels + sec->reloc_count; | |
3634 | ||
a3ef2d63 | 3635 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 NC |
3636 | { |
3637 | actual_offset = offset - removed_bytes; | |
3638 | ||
3639 | /* The ...symbol_deleted_p function will skip over relocs but it | |
3640 | won't adjust their offsets, so do that here. */ | |
3641 | while (cookie->rel < cookie->relend | |
3642 | && cookie->rel->r_offset < offset) | |
3643 | { | |
3644 | cookie->rel->r_offset -= removed_bytes; | |
3645 | cookie->rel++; | |
3646 | } | |
3647 | ||
3648 | while (cookie->rel < cookie->relend | |
3649 | && cookie->rel->r_offset == offset) | |
3650 | { | |
c152c796 | 3651 | if (bfd_elf_reloc_symbol_deleted_p (offset, cookie)) |
e0001a05 NC |
3652 | { |
3653 | /* Remove the table entry. (If the reloc type is NONE, then | |
3654 | the entry has already been merged with another and deleted | |
3655 | during relaxation.) */ | |
3656 | if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE) | |
3657 | { | |
3658 | /* Shift the contents up. */ | |
a3ef2d63 | 3659 | if (offset + entry_size < sec->size) |
e0001a05 | 3660 | memmove (&contents[actual_offset], |
1d25768e | 3661 | &contents[actual_offset + entry_size], |
a3ef2d63 | 3662 | sec->size - offset - entry_size); |
1d25768e | 3663 | removed_bytes += entry_size; |
e0001a05 NC |
3664 | } |
3665 | ||
3666 | /* Remove this relocation. */ | |
3667 | cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
3668 | } | |
3669 | ||
3670 | /* Adjust the relocation offset for previous removals. This | |
3671 | should not be done before calling ...symbol_deleted_p | |
3672 | because it might mess up the offset comparisons there. | |
3673 | Make sure the offset doesn't underflow in the case where | |
3674 | the first entry is removed. */ | |
3675 | if (cookie->rel->r_offset >= removed_bytes) | |
3676 | cookie->rel->r_offset -= removed_bytes; | |
3677 | else | |
3678 | cookie->rel->r_offset = 0; | |
3679 | ||
3680 | cookie->rel++; | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | if (removed_bytes != 0) | |
3685 | { | |
3686 | /* Adjust any remaining relocs (shouldn't be any). */ | |
3687 | for (; cookie->rel < cookie->relend; cookie->rel++) | |
3688 | { | |
3689 | if (cookie->rel->r_offset >= removed_bytes) | |
3690 | cookie->rel->r_offset -= removed_bytes; | |
3691 | else | |
3692 | cookie->rel->r_offset = 0; | |
3693 | } | |
3694 | ||
3695 | /* Clear the removed bytes. */ | |
a3ef2d63 | 3696 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 NC |
3697 | |
3698 | pin_contents (sec, contents); | |
3699 | pin_internal_relocs (sec, cookie->rels); | |
3700 | ||
eea6121a | 3701 | /* Shrink size. */ |
a3ef2d63 BW |
3702 | if (sec->rawsize == 0) |
3703 | sec->rawsize = sec->size; | |
3704 | sec->size -= removed_bytes; | |
b536dc1e BW |
3705 | |
3706 | if (xtensa_is_littable_section (sec)) | |
3707 | { | |
f0e6fdb2 BW |
3708 | asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc; |
3709 | if (sgotloc) | |
3710 | sgotloc->size -= removed_bytes; | |
b536dc1e | 3711 | } |
e0001a05 NC |
3712 | } |
3713 | else | |
3714 | { | |
3715 | release_contents (sec, contents); | |
3716 | release_internal_relocs (sec, cookie->rels); | |
3717 | } | |
3718 | ||
3719 | return (removed_bytes != 0); | |
3720 | } | |
3721 | ||
3722 | ||
3723 | static bfd_boolean | |
7fa3d080 BW |
3724 | elf_xtensa_discard_info (bfd *abfd, |
3725 | struct elf_reloc_cookie *cookie, | |
3726 | struct bfd_link_info *info) | |
e0001a05 NC |
3727 | { |
3728 | asection *sec; | |
3729 | bfd_boolean changed = FALSE; | |
3730 | ||
3731 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
3732 | { | |
3733 | if (xtensa_is_property_section (sec)) | |
3734 | { | |
3735 | if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)) | |
3736 | changed = TRUE; | |
3737 | } | |
3738 | } | |
3739 | ||
3740 | return changed; | |
3741 | } | |
3742 | ||
3743 | ||
3744 | static bfd_boolean | |
7fa3d080 | 3745 | elf_xtensa_ignore_discarded_relocs (asection *sec) |
e0001a05 NC |
3746 | { |
3747 | return xtensa_is_property_section (sec); | |
3748 | } | |
3749 | ||
a77dc2cc BW |
3750 | |
3751 | static unsigned int | |
3752 | elf_xtensa_action_discarded (asection *sec) | |
3753 | { | |
3754 | if (strcmp (".xt_except_table", sec->name) == 0) | |
3755 | return 0; | |
3756 | ||
3757 | if (strcmp (".xt_except_desc", sec->name) == 0) | |
3758 | return 0; | |
3759 | ||
3760 | return _bfd_elf_default_action_discarded (sec); | |
3761 | } | |
3762 | ||
e0001a05 NC |
3763 | \f |
3764 | /* Support for core dump NOTE sections. */ | |
3765 | ||
3766 | static bfd_boolean | |
7fa3d080 | 3767 | elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3768 | { |
3769 | int offset; | |
eea6121a | 3770 | unsigned int size; |
e0001a05 NC |
3771 | |
3772 | /* The size for Xtensa is variable, so don't try to recognize the format | |
3773 | based on the size. Just assume this is GNU/Linux. */ | |
3774 | ||
3775 | /* pr_cursig */ | |
3776 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3777 | ||
3778 | /* pr_pid */ | |
3779 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3780 | ||
3781 | /* pr_reg */ | |
3782 | offset = 72; | |
eea6121a | 3783 | size = note->descsz - offset - 4; |
e0001a05 NC |
3784 | |
3785 | /* Make a ".reg/999" section. */ | |
3786 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3787 | size, note->descpos + offset); |
e0001a05 NC |
3788 | } |
3789 | ||
3790 | ||
3791 | static bfd_boolean | |
7fa3d080 | 3792 | elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3793 | { |
3794 | switch (note->descsz) | |
3795 | { | |
3796 | default: | |
3797 | return FALSE; | |
3798 | ||
3799 | case 128: /* GNU/Linux elf_prpsinfo */ | |
3800 | elf_tdata (abfd)->core_program | |
3801 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
3802 | elf_tdata (abfd)->core_command | |
3803 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
3804 | } | |
3805 | ||
3806 | /* Note that for some reason, a spurious space is tacked | |
3807 | onto the end of the args in some (at least one anyway) | |
3808 | implementations, so strip it off if it exists. */ | |
3809 | ||
3810 | { | |
3811 | char *command = elf_tdata (abfd)->core_command; | |
3812 | int n = strlen (command); | |
3813 | ||
3814 | if (0 < n && command[n - 1] == ' ') | |
3815 | command[n - 1] = '\0'; | |
3816 | } | |
3817 | ||
3818 | return TRUE; | |
3819 | } | |
3820 | ||
3821 | \f | |
3822 | /* Generic Xtensa configurability stuff. */ | |
3823 | ||
3824 | static xtensa_opcode callx0_op = XTENSA_UNDEFINED; | |
3825 | static xtensa_opcode callx4_op = XTENSA_UNDEFINED; | |
3826 | static xtensa_opcode callx8_op = XTENSA_UNDEFINED; | |
3827 | static xtensa_opcode callx12_op = XTENSA_UNDEFINED; | |
3828 | static xtensa_opcode call0_op = XTENSA_UNDEFINED; | |
3829 | static xtensa_opcode call4_op = XTENSA_UNDEFINED; | |
3830 | static xtensa_opcode call8_op = XTENSA_UNDEFINED; | |
3831 | static xtensa_opcode call12_op = XTENSA_UNDEFINED; | |
3832 | ||
3833 | static void | |
7fa3d080 | 3834 | init_call_opcodes (void) |
e0001a05 NC |
3835 | { |
3836 | if (callx0_op == XTENSA_UNDEFINED) | |
3837 | { | |
3838 | callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0"); | |
3839 | callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4"); | |
3840 | callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8"); | |
3841 | callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12"); | |
3842 | call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0"); | |
3843 | call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4"); | |
3844 | call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8"); | |
3845 | call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12"); | |
3846 | } | |
3847 | } | |
3848 | ||
3849 | ||
3850 | static bfd_boolean | |
7fa3d080 | 3851 | is_indirect_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3852 | { |
3853 | init_call_opcodes (); | |
3854 | return (opcode == callx0_op | |
3855 | || opcode == callx4_op | |
3856 | || opcode == callx8_op | |
3857 | || opcode == callx12_op); | |
3858 | } | |
3859 | ||
3860 | ||
3861 | static bfd_boolean | |
7fa3d080 | 3862 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3863 | { |
3864 | init_call_opcodes (); | |
3865 | return (opcode == call0_op | |
3866 | || opcode == call4_op | |
3867 | || opcode == call8_op | |
3868 | || opcode == call12_op); | |
3869 | } | |
3870 | ||
3871 | ||
3872 | static bfd_boolean | |
7fa3d080 | 3873 | is_windowed_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3874 | { |
3875 | init_call_opcodes (); | |
3876 | return (opcode == call4_op | |
3877 | || opcode == call8_op | |
3878 | || opcode == call12_op | |
3879 | || opcode == callx4_op | |
3880 | || opcode == callx8_op | |
3881 | || opcode == callx12_op); | |
3882 | } | |
3883 | ||
3884 | ||
28dbbc02 BW |
3885 | static bfd_boolean |
3886 | get_indirect_call_dest_reg (xtensa_opcode opcode, unsigned *pdst) | |
3887 | { | |
3888 | unsigned dst = (unsigned) -1; | |
3889 | ||
3890 | init_call_opcodes (); | |
3891 | if (opcode == callx0_op) | |
3892 | dst = 0; | |
3893 | else if (opcode == callx4_op) | |
3894 | dst = 4; | |
3895 | else if (opcode == callx8_op) | |
3896 | dst = 8; | |
3897 | else if (opcode == callx12_op) | |
3898 | dst = 12; | |
3899 | ||
3900 | if (dst == (unsigned) -1) | |
3901 | return FALSE; | |
3902 | ||
3903 | *pdst = dst; | |
3904 | return TRUE; | |
3905 | } | |
3906 | ||
3907 | ||
43cd72b9 BW |
3908 | static xtensa_opcode |
3909 | get_const16_opcode (void) | |
3910 | { | |
3911 | static bfd_boolean done_lookup = FALSE; | |
3912 | static xtensa_opcode const16_opcode = XTENSA_UNDEFINED; | |
3913 | if (!done_lookup) | |
3914 | { | |
3915 | const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16"); | |
3916 | done_lookup = TRUE; | |
3917 | } | |
3918 | return const16_opcode; | |
3919 | } | |
3920 | ||
3921 | ||
e0001a05 NC |
3922 | static xtensa_opcode |
3923 | get_l32r_opcode (void) | |
3924 | { | |
3925 | static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED; | |
43cd72b9 BW |
3926 | static bfd_boolean done_lookup = FALSE; |
3927 | ||
3928 | if (!done_lookup) | |
e0001a05 NC |
3929 | { |
3930 | l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r"); | |
43cd72b9 | 3931 | done_lookup = TRUE; |
e0001a05 NC |
3932 | } |
3933 | return l32r_opcode; | |
3934 | } | |
3935 | ||
3936 | ||
3937 | static bfd_vma | |
7fa3d080 | 3938 | l32r_offset (bfd_vma addr, bfd_vma pc) |
e0001a05 NC |
3939 | { |
3940 | bfd_vma offset; | |
3941 | ||
3942 | offset = addr - ((pc+3) & -4); | |
3943 | BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0); | |
3944 | offset = (signed int) offset >> 2; | |
3945 | BFD_ASSERT ((signed int) offset >> 16 == -1); | |
3946 | return offset; | |
3947 | } | |
3948 | ||
3949 | ||
e0001a05 | 3950 | static int |
7fa3d080 | 3951 | get_relocation_opnd (xtensa_opcode opcode, int r_type) |
e0001a05 | 3952 | { |
43cd72b9 BW |
3953 | xtensa_isa isa = xtensa_default_isa; |
3954 | int last_immed, last_opnd, opi; | |
3955 | ||
3956 | if (opcode == XTENSA_UNDEFINED) | |
3957 | return XTENSA_UNDEFINED; | |
3958 | ||
3959 | /* Find the last visible PC-relative immediate operand for the opcode. | |
3960 | If there are no PC-relative immediates, then choose the last visible | |
3961 | immediate; otherwise, fail and return XTENSA_UNDEFINED. */ | |
3962 | last_immed = XTENSA_UNDEFINED; | |
3963 | last_opnd = xtensa_opcode_num_operands (isa, opcode); | |
3964 | for (opi = last_opnd - 1; opi >= 0; opi--) | |
3965 | { | |
3966 | if (xtensa_operand_is_visible (isa, opcode, opi) == 0) | |
3967 | continue; | |
3968 | if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1) | |
3969 | { | |
3970 | last_immed = opi; | |
3971 | break; | |
3972 | } | |
3973 | if (last_immed == XTENSA_UNDEFINED | |
3974 | && xtensa_operand_is_register (isa, opcode, opi) == 0) | |
3975 | last_immed = opi; | |
3976 | } | |
3977 | if (last_immed < 0) | |
3978 | return XTENSA_UNDEFINED; | |
3979 | ||
3980 | /* If the operand number was specified in an old-style relocation, | |
3981 | check for consistency with the operand computed above. */ | |
3982 | if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2) | |
3983 | { | |
3984 | int reloc_opnd = r_type - R_XTENSA_OP0; | |
3985 | if (reloc_opnd != last_immed) | |
3986 | return XTENSA_UNDEFINED; | |
3987 | } | |
3988 | ||
3989 | return last_immed; | |
3990 | } | |
3991 | ||
3992 | ||
3993 | int | |
7fa3d080 | 3994 | get_relocation_slot (int r_type) |
43cd72b9 BW |
3995 | { |
3996 | switch (r_type) | |
3997 | { | |
3998 | case R_XTENSA_OP0: | |
3999 | case R_XTENSA_OP1: | |
4000 | case R_XTENSA_OP2: | |
4001 | return 0; | |
4002 | ||
4003 | default: | |
4004 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
4005 | return r_type - R_XTENSA_SLOT0_OP; | |
4006 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
4007 | return r_type - R_XTENSA_SLOT0_ALT; | |
4008 | break; | |
4009 | } | |
4010 | ||
4011 | return XTENSA_UNDEFINED; | |
e0001a05 NC |
4012 | } |
4013 | ||
4014 | ||
4015 | /* Get the opcode for a relocation. */ | |
4016 | ||
4017 | static xtensa_opcode | |
7fa3d080 BW |
4018 | get_relocation_opcode (bfd *abfd, |
4019 | asection *sec, | |
4020 | bfd_byte *contents, | |
4021 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
4022 | { |
4023 | static xtensa_insnbuf ibuff = NULL; | |
43cd72b9 | 4024 | static xtensa_insnbuf sbuff = NULL; |
e0001a05 | 4025 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
4026 | xtensa_format fmt; |
4027 | int slot; | |
e0001a05 NC |
4028 | |
4029 | if (contents == NULL) | |
4030 | return XTENSA_UNDEFINED; | |
4031 | ||
43cd72b9 | 4032 | if (bfd_get_section_limit (abfd, sec) <= irel->r_offset) |
e0001a05 NC |
4033 | return XTENSA_UNDEFINED; |
4034 | ||
4035 | if (ibuff == NULL) | |
43cd72b9 BW |
4036 | { |
4037 | ibuff = xtensa_insnbuf_alloc (isa); | |
4038 | sbuff = xtensa_insnbuf_alloc (isa); | |
4039 | } | |
4040 | ||
e0001a05 | 4041 | /* Decode the instruction. */ |
43cd72b9 BW |
4042 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset], |
4043 | sec->size - irel->r_offset); | |
4044 | fmt = xtensa_format_decode (isa, ibuff); | |
4045 | slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info)); | |
4046 | if (slot == XTENSA_UNDEFINED) | |
4047 | return XTENSA_UNDEFINED; | |
4048 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); | |
4049 | return xtensa_opcode_decode (isa, fmt, slot, sbuff); | |
e0001a05 NC |
4050 | } |
4051 | ||
4052 | ||
4053 | bfd_boolean | |
7fa3d080 BW |
4054 | is_l32r_relocation (bfd *abfd, |
4055 | asection *sec, | |
4056 | bfd_byte *contents, | |
4057 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
4058 | { |
4059 | xtensa_opcode opcode; | |
43cd72b9 | 4060 | if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info))) |
e0001a05 | 4061 | return FALSE; |
43cd72b9 | 4062 | opcode = get_relocation_opcode (abfd, sec, contents, irel); |
e0001a05 NC |
4063 | return (opcode == get_l32r_opcode ()); |
4064 | } | |
4065 | ||
e0001a05 | 4066 | |
43cd72b9 | 4067 | static bfd_size_type |
7fa3d080 BW |
4068 | get_asm_simplify_size (bfd_byte *contents, |
4069 | bfd_size_type content_len, | |
4070 | bfd_size_type offset) | |
e0001a05 | 4071 | { |
43cd72b9 | 4072 | bfd_size_type insnlen, size = 0; |
e0001a05 | 4073 | |
43cd72b9 BW |
4074 | /* Decode the size of the next two instructions. */ |
4075 | insnlen = insn_decode_len (contents, content_len, offset); | |
4076 | if (insnlen == 0) | |
4077 | return 0; | |
e0001a05 | 4078 | |
43cd72b9 | 4079 | size += insnlen; |
e0001a05 | 4080 | |
43cd72b9 BW |
4081 | insnlen = insn_decode_len (contents, content_len, offset + size); |
4082 | if (insnlen == 0) | |
4083 | return 0; | |
e0001a05 | 4084 | |
43cd72b9 BW |
4085 | size += insnlen; |
4086 | return size; | |
4087 | } | |
e0001a05 | 4088 | |
43cd72b9 BW |
4089 | |
4090 | bfd_boolean | |
7fa3d080 | 4091 | is_alt_relocation (int r_type) |
43cd72b9 BW |
4092 | { |
4093 | return (r_type >= R_XTENSA_SLOT0_ALT | |
4094 | && r_type <= R_XTENSA_SLOT14_ALT); | |
e0001a05 NC |
4095 | } |
4096 | ||
4097 | ||
43cd72b9 | 4098 | bfd_boolean |
7fa3d080 | 4099 | is_operand_relocation (int r_type) |
e0001a05 | 4100 | { |
43cd72b9 BW |
4101 | switch (r_type) |
4102 | { | |
4103 | case R_XTENSA_OP0: | |
4104 | case R_XTENSA_OP1: | |
4105 | case R_XTENSA_OP2: | |
4106 | return TRUE; | |
e0001a05 | 4107 | |
43cd72b9 BW |
4108 | default: |
4109 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
4110 | return TRUE; | |
4111 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
4112 | return TRUE; | |
4113 | break; | |
4114 | } | |
e0001a05 | 4115 | |
43cd72b9 | 4116 | return FALSE; |
e0001a05 NC |
4117 | } |
4118 | ||
43cd72b9 BW |
4119 | |
4120 | #define MIN_INSN_LENGTH 2 | |
e0001a05 | 4121 | |
43cd72b9 BW |
4122 | /* Return 0 if it fails to decode. */ |
4123 | ||
4124 | bfd_size_type | |
7fa3d080 BW |
4125 | insn_decode_len (bfd_byte *contents, |
4126 | bfd_size_type content_len, | |
4127 | bfd_size_type offset) | |
e0001a05 | 4128 | { |
43cd72b9 BW |
4129 | int insn_len; |
4130 | xtensa_isa isa = xtensa_default_isa; | |
4131 | xtensa_format fmt; | |
4132 | static xtensa_insnbuf ibuff = NULL; | |
e0001a05 | 4133 | |
43cd72b9 BW |
4134 | if (offset + MIN_INSN_LENGTH > content_len) |
4135 | return 0; | |
e0001a05 | 4136 | |
43cd72b9 BW |
4137 | if (ibuff == NULL) |
4138 | ibuff = xtensa_insnbuf_alloc (isa); | |
4139 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset], | |
4140 | content_len - offset); | |
4141 | fmt = xtensa_format_decode (isa, ibuff); | |
4142 | if (fmt == XTENSA_UNDEFINED) | |
4143 | return 0; | |
4144 | insn_len = xtensa_format_length (isa, fmt); | |
4145 | if (insn_len == XTENSA_UNDEFINED) | |
4146 | return 0; | |
4147 | return insn_len; | |
e0001a05 NC |
4148 | } |
4149 | ||
4150 | ||
43cd72b9 BW |
4151 | /* Decode the opcode for a single slot instruction. |
4152 | Return 0 if it fails to decode or the instruction is multi-slot. */ | |
e0001a05 | 4153 | |
43cd72b9 | 4154 | xtensa_opcode |
7fa3d080 BW |
4155 | insn_decode_opcode (bfd_byte *contents, |
4156 | bfd_size_type content_len, | |
4157 | bfd_size_type offset, | |
4158 | int slot) | |
e0001a05 | 4159 | { |
e0001a05 | 4160 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
4161 | xtensa_format fmt; |
4162 | static xtensa_insnbuf insnbuf = NULL; | |
4163 | static xtensa_insnbuf slotbuf = NULL; | |
4164 | ||
4165 | if (offset + MIN_INSN_LENGTH > content_len) | |
e0001a05 NC |
4166 | return XTENSA_UNDEFINED; |
4167 | ||
4168 | if (insnbuf == NULL) | |
43cd72b9 BW |
4169 | { |
4170 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4171 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4172 | } | |
4173 | ||
4174 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4175 | content_len - offset); | |
4176 | fmt = xtensa_format_decode (isa, insnbuf); | |
4177 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4178 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4179 | |
4180 | if (slot >= xtensa_format_num_slots (isa, fmt)) | |
e0001a05 | 4181 | return XTENSA_UNDEFINED; |
e0001a05 | 4182 | |
43cd72b9 BW |
4183 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
4184 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
4185 | } | |
e0001a05 | 4186 | |
e0001a05 | 4187 | |
43cd72b9 BW |
4188 | /* The offset is the offset in the contents. |
4189 | The address is the address of that offset. */ | |
e0001a05 | 4190 | |
43cd72b9 | 4191 | static bfd_boolean |
7fa3d080 BW |
4192 | check_branch_target_aligned (bfd_byte *contents, |
4193 | bfd_size_type content_length, | |
4194 | bfd_vma offset, | |
4195 | bfd_vma address) | |
43cd72b9 BW |
4196 | { |
4197 | bfd_size_type insn_len = insn_decode_len (contents, content_length, offset); | |
4198 | if (insn_len == 0) | |
4199 | return FALSE; | |
4200 | return check_branch_target_aligned_address (address, insn_len); | |
4201 | } | |
e0001a05 | 4202 | |
e0001a05 | 4203 | |
43cd72b9 | 4204 | static bfd_boolean |
7fa3d080 BW |
4205 | check_loop_aligned (bfd_byte *contents, |
4206 | bfd_size_type content_length, | |
4207 | bfd_vma offset, | |
4208 | bfd_vma address) | |
e0001a05 | 4209 | { |
43cd72b9 | 4210 | bfd_size_type loop_len, insn_len; |
64b607e6 | 4211 | xtensa_opcode opcode; |
e0001a05 | 4212 | |
64b607e6 BW |
4213 | opcode = insn_decode_opcode (contents, content_length, offset, 0); |
4214 | if (opcode == XTENSA_UNDEFINED | |
4215 | || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1) | |
4216 | { | |
4217 | BFD_ASSERT (FALSE); | |
4218 | return FALSE; | |
4219 | } | |
4220 | ||
43cd72b9 | 4221 | loop_len = insn_decode_len (contents, content_length, offset); |
43cd72b9 | 4222 | insn_len = insn_decode_len (contents, content_length, offset + loop_len); |
64b607e6 BW |
4223 | if (loop_len == 0 || insn_len == 0) |
4224 | { | |
4225 | BFD_ASSERT (FALSE); | |
4226 | return FALSE; | |
4227 | } | |
e0001a05 | 4228 | |
43cd72b9 BW |
4229 | return check_branch_target_aligned_address (address + loop_len, insn_len); |
4230 | } | |
e0001a05 | 4231 | |
e0001a05 NC |
4232 | |
4233 | static bfd_boolean | |
7fa3d080 | 4234 | check_branch_target_aligned_address (bfd_vma addr, int len) |
e0001a05 | 4235 | { |
43cd72b9 BW |
4236 | if (len == 8) |
4237 | return (addr % 8 == 0); | |
4238 | return ((addr >> 2) == ((addr + len - 1) >> 2)); | |
e0001a05 NC |
4239 | } |
4240 | ||
43cd72b9 BW |
4241 | \f |
4242 | /* Instruction widening and narrowing. */ | |
e0001a05 | 4243 | |
7fa3d080 BW |
4244 | /* When FLIX is available we need to access certain instructions only |
4245 | when they are 16-bit or 24-bit instructions. This table caches | |
4246 | information about such instructions by walking through all the | |
4247 | opcodes and finding the smallest single-slot format into which each | |
4248 | can be encoded. */ | |
4249 | ||
4250 | static xtensa_format *op_single_fmt_table = NULL; | |
e0001a05 NC |
4251 | |
4252 | ||
7fa3d080 BW |
4253 | static void |
4254 | init_op_single_format_table (void) | |
e0001a05 | 4255 | { |
7fa3d080 BW |
4256 | xtensa_isa isa = xtensa_default_isa; |
4257 | xtensa_insnbuf ibuf; | |
4258 | xtensa_opcode opcode; | |
4259 | xtensa_format fmt; | |
4260 | int num_opcodes; | |
4261 | ||
4262 | if (op_single_fmt_table) | |
4263 | return; | |
4264 | ||
4265 | ibuf = xtensa_insnbuf_alloc (isa); | |
4266 | num_opcodes = xtensa_isa_num_opcodes (isa); | |
4267 | ||
4268 | op_single_fmt_table = (xtensa_format *) | |
4269 | bfd_malloc (sizeof (xtensa_format) * num_opcodes); | |
4270 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
4271 | { | |
4272 | op_single_fmt_table[opcode] = XTENSA_UNDEFINED; | |
4273 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
4274 | { | |
4275 | if (xtensa_format_num_slots (isa, fmt) == 1 | |
4276 | && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0) | |
4277 | { | |
4278 | xtensa_opcode old_fmt = op_single_fmt_table[opcode]; | |
4279 | int fmt_length = xtensa_format_length (isa, fmt); | |
4280 | if (old_fmt == XTENSA_UNDEFINED | |
4281 | || fmt_length < xtensa_format_length (isa, old_fmt)) | |
4282 | op_single_fmt_table[opcode] = fmt; | |
4283 | } | |
4284 | } | |
4285 | } | |
4286 | xtensa_insnbuf_free (isa, ibuf); | |
4287 | } | |
4288 | ||
4289 | ||
4290 | static xtensa_format | |
4291 | get_single_format (xtensa_opcode opcode) | |
4292 | { | |
4293 | init_op_single_format_table (); | |
4294 | return op_single_fmt_table[opcode]; | |
4295 | } | |
e0001a05 | 4296 | |
e0001a05 | 4297 | |
43cd72b9 BW |
4298 | /* For the set of narrowable instructions we do NOT include the |
4299 | narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities | |
4300 | involved during linker relaxation that may require these to | |
4301 | re-expand in some conditions. Also, the narrowing "or" -> mov.n | |
4302 | requires special case code to ensure it only works when op1 == op2. */ | |
e0001a05 | 4303 | |
7fa3d080 BW |
4304 | struct string_pair |
4305 | { | |
4306 | const char *wide; | |
4307 | const char *narrow; | |
4308 | }; | |
4309 | ||
43cd72b9 | 4310 | struct string_pair narrowable[] = |
e0001a05 | 4311 | { |
43cd72b9 BW |
4312 | { "add", "add.n" }, |
4313 | { "addi", "addi.n" }, | |
4314 | { "addmi", "addi.n" }, | |
4315 | { "l32i", "l32i.n" }, | |
4316 | { "movi", "movi.n" }, | |
4317 | { "ret", "ret.n" }, | |
4318 | { "retw", "retw.n" }, | |
4319 | { "s32i", "s32i.n" }, | |
4320 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4321 | }; | |
e0001a05 | 4322 | |
43cd72b9 | 4323 | struct string_pair widenable[] = |
e0001a05 | 4324 | { |
43cd72b9 BW |
4325 | { "add", "add.n" }, |
4326 | { "addi", "addi.n" }, | |
4327 | { "addmi", "addi.n" }, | |
4328 | { "beqz", "beqz.n" }, | |
4329 | { "bnez", "bnez.n" }, | |
4330 | { "l32i", "l32i.n" }, | |
4331 | { "movi", "movi.n" }, | |
4332 | { "ret", "ret.n" }, | |
4333 | { "retw", "retw.n" }, | |
4334 | { "s32i", "s32i.n" }, | |
4335 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4336 | }; | |
e0001a05 NC |
4337 | |
4338 | ||
64b607e6 BW |
4339 | /* Check if an instruction can be "narrowed", i.e., changed from a standard |
4340 | 3-byte instruction to a 2-byte "density" instruction. If it is valid, | |
4341 | return the instruction buffer holding the narrow instruction. Otherwise, | |
4342 | return 0. The set of valid narrowing are specified by a string table | |
43cd72b9 BW |
4343 | but require some special case operand checks in some cases. */ |
4344 | ||
64b607e6 BW |
4345 | static xtensa_insnbuf |
4346 | can_narrow_instruction (xtensa_insnbuf slotbuf, | |
4347 | xtensa_format fmt, | |
4348 | xtensa_opcode opcode) | |
e0001a05 | 4349 | { |
43cd72b9 | 4350 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4351 | xtensa_format o_fmt; |
4352 | unsigned opi; | |
e0001a05 | 4353 | |
43cd72b9 BW |
4354 | static xtensa_insnbuf o_insnbuf = NULL; |
4355 | static xtensa_insnbuf o_slotbuf = NULL; | |
e0001a05 | 4356 | |
64b607e6 | 4357 | if (o_insnbuf == NULL) |
43cd72b9 | 4358 | { |
43cd72b9 BW |
4359 | o_insnbuf = xtensa_insnbuf_alloc (isa); |
4360 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4361 | } | |
e0001a05 | 4362 | |
64b607e6 | 4363 | for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++) |
43cd72b9 BW |
4364 | { |
4365 | bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0); | |
e0001a05 | 4366 | |
43cd72b9 BW |
4367 | if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide)) |
4368 | { | |
4369 | uint32 value, newval; | |
4370 | int i, operand_count, o_operand_count; | |
4371 | xtensa_opcode o_opcode; | |
e0001a05 | 4372 | |
43cd72b9 BW |
4373 | /* Address does not matter in this case. We might need to |
4374 | fix it to handle branches/jumps. */ | |
4375 | bfd_vma self_address = 0; | |
e0001a05 | 4376 | |
43cd72b9 BW |
4377 | o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow); |
4378 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4379 | return 0; |
43cd72b9 BW |
4380 | o_fmt = get_single_format (o_opcode); |
4381 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4382 | return 0; |
e0001a05 | 4383 | |
43cd72b9 BW |
4384 | if (xtensa_format_length (isa, fmt) != 3 |
4385 | || xtensa_format_length (isa, o_fmt) != 2) | |
64b607e6 | 4386 | return 0; |
e0001a05 | 4387 | |
43cd72b9 BW |
4388 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4389 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4390 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
e0001a05 | 4391 | |
43cd72b9 | 4392 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4393 | return 0; |
e0001a05 | 4394 | |
43cd72b9 BW |
4395 | if (!is_or) |
4396 | { | |
4397 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4398 | return 0; |
43cd72b9 BW |
4399 | } |
4400 | else | |
4401 | { | |
4402 | uint32 rawval0, rawval1, rawval2; | |
e0001a05 | 4403 | |
64b607e6 BW |
4404 | if (o_operand_count + 1 != operand_count |
4405 | || xtensa_operand_get_field (isa, opcode, 0, | |
4406 | fmt, 0, slotbuf, &rawval0) != 0 | |
4407 | || xtensa_operand_get_field (isa, opcode, 1, | |
4408 | fmt, 0, slotbuf, &rawval1) != 0 | |
4409 | || xtensa_operand_get_field (isa, opcode, 2, | |
4410 | fmt, 0, slotbuf, &rawval2) != 0 | |
4411 | || rawval1 != rawval2 | |
4412 | || rawval0 == rawval1 /* it is a nop */) | |
4413 | return 0; | |
43cd72b9 | 4414 | } |
e0001a05 | 4415 | |
43cd72b9 BW |
4416 | for (i = 0; i < o_operand_count; ++i) |
4417 | { | |
4418 | if (xtensa_operand_get_field (isa, opcode, i, fmt, 0, | |
4419 | slotbuf, &value) | |
4420 | || xtensa_operand_decode (isa, opcode, i, &value)) | |
64b607e6 | 4421 | return 0; |
e0001a05 | 4422 | |
43cd72b9 BW |
4423 | /* PC-relative branches need adjustment, but |
4424 | the PC-rel operand will always have a relocation. */ | |
4425 | newval = value; | |
4426 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4427 | self_address) | |
4428 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4429 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4430 | o_slotbuf, newval)) | |
64b607e6 | 4431 | return 0; |
43cd72b9 | 4432 | } |
e0001a05 | 4433 | |
64b607e6 BW |
4434 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) |
4435 | return 0; | |
e0001a05 | 4436 | |
64b607e6 | 4437 | return o_insnbuf; |
43cd72b9 BW |
4438 | } |
4439 | } | |
64b607e6 | 4440 | return 0; |
43cd72b9 | 4441 | } |
e0001a05 | 4442 | |
e0001a05 | 4443 | |
64b607e6 BW |
4444 | /* Attempt to narrow an instruction. If the narrowing is valid, perform |
4445 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4446 | the return value is FALSE and the contents are not modified. */ | |
e0001a05 | 4447 | |
43cd72b9 | 4448 | static bfd_boolean |
64b607e6 BW |
4449 | narrow_instruction (bfd_byte *contents, |
4450 | bfd_size_type content_length, | |
4451 | bfd_size_type offset) | |
e0001a05 | 4452 | { |
43cd72b9 | 4453 | xtensa_opcode opcode; |
64b607e6 | 4454 | bfd_size_type insn_len; |
43cd72b9 | 4455 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4456 | xtensa_format fmt; |
4457 | xtensa_insnbuf o_insnbuf; | |
e0001a05 | 4458 | |
43cd72b9 BW |
4459 | static xtensa_insnbuf insnbuf = NULL; |
4460 | static xtensa_insnbuf slotbuf = NULL; | |
e0001a05 | 4461 | |
43cd72b9 BW |
4462 | if (insnbuf == NULL) |
4463 | { | |
4464 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4465 | slotbuf = xtensa_insnbuf_alloc (isa); | |
43cd72b9 | 4466 | } |
e0001a05 | 4467 | |
43cd72b9 | 4468 | BFD_ASSERT (offset < content_length); |
2c8c90bc | 4469 | |
43cd72b9 | 4470 | if (content_length < 2) |
e0001a05 NC |
4471 | return FALSE; |
4472 | ||
64b607e6 | 4473 | /* We will hand-code a few of these for a little while. |
43cd72b9 BW |
4474 | These have all been specified in the assembler aleady. */ |
4475 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4476 | content_length - offset); | |
4477 | fmt = xtensa_format_decode (isa, insnbuf); | |
4478 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
e0001a05 NC |
4479 | return FALSE; |
4480 | ||
43cd72b9 | 4481 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) |
e0001a05 NC |
4482 | return FALSE; |
4483 | ||
43cd72b9 BW |
4484 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); |
4485 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 4486 | return FALSE; |
43cd72b9 BW |
4487 | insn_len = xtensa_format_length (isa, fmt); |
4488 | if (insn_len > content_length) | |
4489 | return FALSE; | |
4490 | ||
64b607e6 BW |
4491 | o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode); |
4492 | if (o_insnbuf) | |
4493 | { | |
4494 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4495 | content_length - offset); | |
4496 | return TRUE; | |
4497 | } | |
4498 | ||
4499 | return FALSE; | |
4500 | } | |
4501 | ||
4502 | ||
4503 | /* Check if an instruction can be "widened", i.e., changed from a 2-byte | |
4504 | "density" instruction to a standard 3-byte instruction. If it is valid, | |
4505 | return the instruction buffer holding the wide instruction. Otherwise, | |
4506 | return 0. The set of valid widenings are specified by a string table | |
4507 | but require some special case operand checks in some cases. */ | |
4508 | ||
4509 | static xtensa_insnbuf | |
4510 | can_widen_instruction (xtensa_insnbuf slotbuf, | |
4511 | xtensa_format fmt, | |
4512 | xtensa_opcode opcode) | |
4513 | { | |
4514 | xtensa_isa isa = xtensa_default_isa; | |
4515 | xtensa_format o_fmt; | |
4516 | unsigned opi; | |
4517 | ||
4518 | static xtensa_insnbuf o_insnbuf = NULL; | |
4519 | static xtensa_insnbuf o_slotbuf = NULL; | |
4520 | ||
4521 | if (o_insnbuf == NULL) | |
4522 | { | |
4523 | o_insnbuf = xtensa_insnbuf_alloc (isa); | |
4524 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4525 | } | |
4526 | ||
4527 | for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++) | |
e0001a05 | 4528 | { |
43cd72b9 BW |
4529 | bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0); |
4530 | bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0 | |
4531 | || strcmp ("bnez", widenable[opi].wide) == 0); | |
e0001a05 | 4532 | |
43cd72b9 BW |
4533 | if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow)) |
4534 | { | |
4535 | uint32 value, newval; | |
4536 | int i, operand_count, o_operand_count, check_operand_count; | |
4537 | xtensa_opcode o_opcode; | |
e0001a05 | 4538 | |
43cd72b9 BW |
4539 | /* Address does not matter in this case. We might need to fix it |
4540 | to handle branches/jumps. */ | |
4541 | bfd_vma self_address = 0; | |
e0001a05 | 4542 | |
43cd72b9 BW |
4543 | o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide); |
4544 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4545 | return 0; |
43cd72b9 BW |
4546 | o_fmt = get_single_format (o_opcode); |
4547 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4548 | return 0; |
e0001a05 | 4549 | |
43cd72b9 BW |
4550 | if (xtensa_format_length (isa, fmt) != 2 |
4551 | || xtensa_format_length (isa, o_fmt) != 3) | |
64b607e6 | 4552 | return 0; |
e0001a05 | 4553 | |
43cd72b9 BW |
4554 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4555 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4556 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
4557 | check_operand_count = o_operand_count; | |
e0001a05 | 4558 | |
43cd72b9 | 4559 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4560 | return 0; |
e0001a05 | 4561 | |
43cd72b9 BW |
4562 | if (!is_or) |
4563 | { | |
4564 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4565 | return 0; |
43cd72b9 BW |
4566 | } |
4567 | else | |
4568 | { | |
4569 | uint32 rawval0, rawval1; | |
4570 | ||
64b607e6 BW |
4571 | if (o_operand_count != operand_count + 1 |
4572 | || xtensa_operand_get_field (isa, opcode, 0, | |
4573 | fmt, 0, slotbuf, &rawval0) != 0 | |
4574 | || xtensa_operand_get_field (isa, opcode, 1, | |
4575 | fmt, 0, slotbuf, &rawval1) != 0 | |
4576 | || rawval0 == rawval1 /* it is a nop */) | |
4577 | return 0; | |
43cd72b9 BW |
4578 | } |
4579 | if (is_branch) | |
4580 | check_operand_count--; | |
4581 | ||
64b607e6 | 4582 | for (i = 0; i < check_operand_count; i++) |
43cd72b9 BW |
4583 | { |
4584 | int new_i = i; | |
4585 | if (is_or && i == o_operand_count - 1) | |
4586 | new_i = i - 1; | |
4587 | if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0, | |
4588 | slotbuf, &value) | |
4589 | || xtensa_operand_decode (isa, opcode, new_i, &value)) | |
64b607e6 | 4590 | return 0; |
43cd72b9 BW |
4591 | |
4592 | /* PC-relative branches need adjustment, but | |
4593 | the PC-rel operand will always have a relocation. */ | |
4594 | newval = value; | |
4595 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4596 | self_address) | |
4597 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4598 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4599 | o_slotbuf, newval)) | |
64b607e6 | 4600 | return 0; |
43cd72b9 BW |
4601 | } |
4602 | ||
4603 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) | |
64b607e6 | 4604 | return 0; |
43cd72b9 | 4605 | |
64b607e6 | 4606 | return o_insnbuf; |
43cd72b9 BW |
4607 | } |
4608 | } | |
64b607e6 BW |
4609 | return 0; |
4610 | } | |
4611 | ||
4612 | ||
4613 | /* Attempt to widen an instruction. If the widening is valid, perform | |
4614 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4615 | the return value is FALSE and the contents are not modified. */ | |
4616 | ||
4617 | static bfd_boolean | |
4618 | widen_instruction (bfd_byte *contents, | |
4619 | bfd_size_type content_length, | |
4620 | bfd_size_type offset) | |
4621 | { | |
4622 | xtensa_opcode opcode; | |
4623 | bfd_size_type insn_len; | |
4624 | xtensa_isa isa = xtensa_default_isa; | |
4625 | xtensa_format fmt; | |
4626 | xtensa_insnbuf o_insnbuf; | |
4627 | ||
4628 | static xtensa_insnbuf insnbuf = NULL; | |
4629 | static xtensa_insnbuf slotbuf = NULL; | |
4630 | ||
4631 | if (insnbuf == NULL) | |
4632 | { | |
4633 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4634 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4635 | } | |
4636 | ||
4637 | BFD_ASSERT (offset < content_length); | |
4638 | ||
4639 | if (content_length < 2) | |
4640 | return FALSE; | |
4641 | ||
4642 | /* We will hand-code a few of these for a little while. | |
4643 | These have all been specified in the assembler aleady. */ | |
4644 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4645 | content_length - offset); | |
4646 | fmt = xtensa_format_decode (isa, insnbuf); | |
4647 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
4648 | return FALSE; | |
4649 | ||
4650 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) | |
4651 | return FALSE; | |
4652 | ||
4653 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4654 | if (opcode == XTENSA_UNDEFINED) | |
4655 | return FALSE; | |
4656 | insn_len = xtensa_format_length (isa, fmt); | |
4657 | if (insn_len > content_length) | |
4658 | return FALSE; | |
4659 | ||
4660 | o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode); | |
4661 | if (o_insnbuf) | |
4662 | { | |
4663 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4664 | content_length - offset); | |
4665 | return TRUE; | |
4666 | } | |
43cd72b9 | 4667 | return FALSE; |
e0001a05 NC |
4668 | } |
4669 | ||
43cd72b9 BW |
4670 | \f |
4671 | /* Code for transforming CALLs at link-time. */ | |
e0001a05 | 4672 | |
43cd72b9 | 4673 | static bfd_reloc_status_type |
7fa3d080 BW |
4674 | elf_xtensa_do_asm_simplify (bfd_byte *contents, |
4675 | bfd_vma address, | |
4676 | bfd_vma content_length, | |
4677 | char **error_message) | |
e0001a05 | 4678 | { |
43cd72b9 BW |
4679 | static xtensa_insnbuf insnbuf = NULL; |
4680 | static xtensa_insnbuf slotbuf = NULL; | |
4681 | xtensa_format core_format = XTENSA_UNDEFINED; | |
4682 | xtensa_opcode opcode; | |
4683 | xtensa_opcode direct_call_opcode; | |
4684 | xtensa_isa isa = xtensa_default_isa; | |
4685 | bfd_byte *chbuf = contents + address; | |
4686 | int opn; | |
e0001a05 | 4687 | |
43cd72b9 | 4688 | if (insnbuf == NULL) |
e0001a05 | 4689 | { |
43cd72b9 BW |
4690 | insnbuf = xtensa_insnbuf_alloc (isa); |
4691 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4692 | } |
e0001a05 | 4693 | |
43cd72b9 BW |
4694 | if (content_length < address) |
4695 | { | |
4696 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
4697 | return bfd_reloc_other; | |
4698 | } | |
e0001a05 | 4699 | |
43cd72b9 BW |
4700 | opcode = get_expanded_call_opcode (chbuf, content_length - address, 0); |
4701 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
4702 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
4703 | { | |
4704 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
4705 | return bfd_reloc_other; | |
4706 | } | |
4707 | ||
4708 | /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */ | |
4709 | core_format = xtensa_format_lookup (isa, "x24"); | |
4710 | opcode = xtensa_opcode_lookup (isa, "or"); | |
4711 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode); | |
4712 | for (opn = 0; opn < 3; opn++) | |
4713 | { | |
4714 | uint32 regno = 1; | |
4715 | xtensa_operand_encode (isa, opcode, opn, ®no); | |
4716 | xtensa_operand_set_field (isa, opcode, opn, core_format, 0, | |
4717 | slotbuf, regno); | |
4718 | } | |
4719 | xtensa_format_encode (isa, core_format, insnbuf); | |
4720 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4721 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address); | |
e0001a05 | 4722 | |
43cd72b9 BW |
4723 | /* Assemble a CALL ("callN 0") into the 3 byte offset. */ |
4724 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode); | |
4725 | xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0); | |
e0001a05 | 4726 | |
43cd72b9 BW |
4727 | xtensa_format_encode (isa, core_format, insnbuf); |
4728 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4729 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3, | |
4730 | content_length - address - 3); | |
e0001a05 | 4731 | |
43cd72b9 BW |
4732 | return bfd_reloc_ok; |
4733 | } | |
e0001a05 | 4734 | |
e0001a05 | 4735 | |
43cd72b9 | 4736 | static bfd_reloc_status_type |
7fa3d080 BW |
4737 | contract_asm_expansion (bfd_byte *contents, |
4738 | bfd_vma content_length, | |
4739 | Elf_Internal_Rela *irel, | |
4740 | char **error_message) | |
43cd72b9 BW |
4741 | { |
4742 | bfd_reloc_status_type retval = | |
4743 | elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length, | |
4744 | error_message); | |
e0001a05 | 4745 | |
43cd72b9 BW |
4746 | if (retval != bfd_reloc_ok) |
4747 | return bfd_reloc_dangerous; | |
e0001a05 | 4748 | |
43cd72b9 BW |
4749 | /* Update the irel->r_offset field so that the right immediate and |
4750 | the right instruction are modified during the relocation. */ | |
4751 | irel->r_offset += 3; | |
4752 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP); | |
4753 | return bfd_reloc_ok; | |
4754 | } | |
e0001a05 | 4755 | |
e0001a05 | 4756 | |
43cd72b9 | 4757 | static xtensa_opcode |
7fa3d080 | 4758 | swap_callx_for_call_opcode (xtensa_opcode opcode) |
e0001a05 | 4759 | { |
43cd72b9 | 4760 | init_call_opcodes (); |
e0001a05 | 4761 | |
43cd72b9 BW |
4762 | if (opcode == callx0_op) return call0_op; |
4763 | if (opcode == callx4_op) return call4_op; | |
4764 | if (opcode == callx8_op) return call8_op; | |
4765 | if (opcode == callx12_op) return call12_op; | |
e0001a05 | 4766 | |
43cd72b9 BW |
4767 | /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */ |
4768 | return XTENSA_UNDEFINED; | |
4769 | } | |
e0001a05 | 4770 | |
e0001a05 | 4771 | |
43cd72b9 BW |
4772 | /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN; |
4773 | CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode. | |
4774 | If not, return XTENSA_UNDEFINED. */ | |
e0001a05 | 4775 | |
43cd72b9 BW |
4776 | #define L32R_TARGET_REG_OPERAND 0 |
4777 | #define CONST16_TARGET_REG_OPERAND 0 | |
4778 | #define CALLN_SOURCE_OPERAND 0 | |
e0001a05 | 4779 | |
43cd72b9 | 4780 | static xtensa_opcode |
7fa3d080 | 4781 | get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r) |
e0001a05 | 4782 | { |
43cd72b9 BW |
4783 | static xtensa_insnbuf insnbuf = NULL; |
4784 | static xtensa_insnbuf slotbuf = NULL; | |
4785 | xtensa_format fmt; | |
4786 | xtensa_opcode opcode; | |
4787 | xtensa_isa isa = xtensa_default_isa; | |
4788 | uint32 regno, const16_regno, call_regno; | |
4789 | int offset = 0; | |
e0001a05 | 4790 | |
43cd72b9 | 4791 | if (insnbuf == NULL) |
e0001a05 | 4792 | { |
43cd72b9 BW |
4793 | insnbuf = xtensa_insnbuf_alloc (isa); |
4794 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4795 | } |
43cd72b9 BW |
4796 | |
4797 | xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize); | |
4798 | fmt = xtensa_format_decode (isa, insnbuf); | |
4799 | if (fmt == XTENSA_UNDEFINED | |
4800 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4801 | return XTENSA_UNDEFINED; | |
4802 | ||
4803 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4804 | if (opcode == XTENSA_UNDEFINED) | |
4805 | return XTENSA_UNDEFINED; | |
4806 | ||
4807 | if (opcode == get_l32r_opcode ()) | |
e0001a05 | 4808 | { |
43cd72b9 BW |
4809 | if (p_uses_l32r) |
4810 | *p_uses_l32r = TRUE; | |
4811 | if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4812 | fmt, 0, slotbuf, ®no) | |
4813 | || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4814 | ®no)) | |
4815 | return XTENSA_UNDEFINED; | |
e0001a05 | 4816 | } |
43cd72b9 | 4817 | else if (opcode == get_const16_opcode ()) |
e0001a05 | 4818 | { |
43cd72b9 BW |
4819 | if (p_uses_l32r) |
4820 | *p_uses_l32r = FALSE; | |
4821 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4822 | fmt, 0, slotbuf, ®no) | |
4823 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4824 | ®no)) | |
4825 | return XTENSA_UNDEFINED; | |
4826 | ||
4827 | /* Check that the next instruction is also CONST16. */ | |
4828 | offset += xtensa_format_length (isa, fmt); | |
4829 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4830 | fmt = xtensa_format_decode (isa, insnbuf); | |
4831 | if (fmt == XTENSA_UNDEFINED | |
4832 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4833 | return XTENSA_UNDEFINED; | |
4834 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4835 | if (opcode != get_const16_opcode ()) | |
4836 | return XTENSA_UNDEFINED; | |
4837 | ||
4838 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4839 | fmt, 0, slotbuf, &const16_regno) | |
4840 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4841 | &const16_regno) | |
4842 | || const16_regno != regno) | |
4843 | return XTENSA_UNDEFINED; | |
e0001a05 | 4844 | } |
43cd72b9 BW |
4845 | else |
4846 | return XTENSA_UNDEFINED; | |
e0001a05 | 4847 | |
43cd72b9 BW |
4848 | /* Next instruction should be an CALLXn with operand 0 == regno. */ |
4849 | offset += xtensa_format_length (isa, fmt); | |
4850 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4851 | fmt = xtensa_format_decode (isa, insnbuf); | |
4852 | if (fmt == XTENSA_UNDEFINED | |
4853 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4854 | return XTENSA_UNDEFINED; | |
4855 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4856 | if (opcode == XTENSA_UNDEFINED | |
4857 | || !is_indirect_call_opcode (opcode)) | |
4858 | return XTENSA_UNDEFINED; | |
e0001a05 | 4859 | |
43cd72b9 BW |
4860 | if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND, |
4861 | fmt, 0, slotbuf, &call_regno) | |
4862 | || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND, | |
4863 | &call_regno)) | |
4864 | return XTENSA_UNDEFINED; | |
e0001a05 | 4865 | |
43cd72b9 BW |
4866 | if (call_regno != regno) |
4867 | return XTENSA_UNDEFINED; | |
e0001a05 | 4868 | |
43cd72b9 BW |
4869 | return opcode; |
4870 | } | |
e0001a05 | 4871 | |
43cd72b9 BW |
4872 | \f |
4873 | /* Data structures used during relaxation. */ | |
e0001a05 | 4874 | |
43cd72b9 | 4875 | /* r_reloc: relocation values. */ |
e0001a05 | 4876 | |
43cd72b9 BW |
4877 | /* Through the relaxation process, we need to keep track of the values |
4878 | that will result from evaluating relocations. The standard ELF | |
4879 | relocation structure is not sufficient for this purpose because we're | |
4880 | operating on multiple input files at once, so we need to know which | |
4881 | input file a relocation refers to. The r_reloc structure thus | |
4882 | records both the input file (bfd) and ELF relocation. | |
e0001a05 | 4883 | |
43cd72b9 BW |
4884 | For efficiency, an r_reloc also contains a "target_offset" field to |
4885 | cache the target-section-relative offset value that is represented by | |
4886 | the relocation. | |
4887 | ||
4888 | The r_reloc also contains a virtual offset that allows multiple | |
4889 | inserted literals to be placed at the same "address" with | |
4890 | different offsets. */ | |
e0001a05 | 4891 | |
43cd72b9 | 4892 | typedef struct r_reloc_struct r_reloc; |
e0001a05 | 4893 | |
43cd72b9 | 4894 | struct r_reloc_struct |
e0001a05 | 4895 | { |
43cd72b9 BW |
4896 | bfd *abfd; |
4897 | Elf_Internal_Rela rela; | |
e0001a05 | 4898 | bfd_vma target_offset; |
43cd72b9 | 4899 | bfd_vma virtual_offset; |
e0001a05 NC |
4900 | }; |
4901 | ||
e0001a05 | 4902 | |
43cd72b9 BW |
4903 | /* The r_reloc structure is included by value in literal_value, but not |
4904 | every literal_value has an associated relocation -- some are simple | |
4905 | constants. In such cases, we set all the fields in the r_reloc | |
4906 | struct to zero. The r_reloc_is_const function should be used to | |
4907 | detect this case. */ | |
e0001a05 | 4908 | |
43cd72b9 | 4909 | static bfd_boolean |
7fa3d080 | 4910 | r_reloc_is_const (const r_reloc *r_rel) |
e0001a05 | 4911 | { |
43cd72b9 | 4912 | return (r_rel->abfd == NULL); |
e0001a05 NC |
4913 | } |
4914 | ||
4915 | ||
43cd72b9 | 4916 | static bfd_vma |
7fa3d080 | 4917 | r_reloc_get_target_offset (const r_reloc *r_rel) |
e0001a05 | 4918 | { |
43cd72b9 BW |
4919 | bfd_vma target_offset; |
4920 | unsigned long r_symndx; | |
e0001a05 | 4921 | |
43cd72b9 BW |
4922 | BFD_ASSERT (!r_reloc_is_const (r_rel)); |
4923 | r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4924 | target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx); | |
4925 | return (target_offset + r_rel->rela.r_addend); | |
4926 | } | |
e0001a05 | 4927 | |
e0001a05 | 4928 | |
43cd72b9 | 4929 | static struct elf_link_hash_entry * |
7fa3d080 | 4930 | r_reloc_get_hash_entry (const r_reloc *r_rel) |
e0001a05 | 4931 | { |
43cd72b9 BW |
4932 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); |
4933 | return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx); | |
4934 | } | |
e0001a05 | 4935 | |
43cd72b9 BW |
4936 | |
4937 | static asection * | |
7fa3d080 | 4938 | r_reloc_get_section (const r_reloc *r_rel) |
43cd72b9 BW |
4939 | { |
4940 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4941 | return get_elf_r_symndx_section (r_rel->abfd, r_symndx); | |
4942 | } | |
e0001a05 NC |
4943 | |
4944 | ||
4945 | static bfd_boolean | |
7fa3d080 | 4946 | r_reloc_is_defined (const r_reloc *r_rel) |
e0001a05 | 4947 | { |
43cd72b9 BW |
4948 | asection *sec; |
4949 | if (r_rel == NULL) | |
e0001a05 | 4950 | return FALSE; |
e0001a05 | 4951 | |
43cd72b9 BW |
4952 | sec = r_reloc_get_section (r_rel); |
4953 | if (sec == bfd_abs_section_ptr | |
4954 | || sec == bfd_com_section_ptr | |
4955 | || sec == bfd_und_section_ptr) | |
4956 | return FALSE; | |
4957 | return TRUE; | |
e0001a05 NC |
4958 | } |
4959 | ||
4960 | ||
7fa3d080 BW |
4961 | static void |
4962 | r_reloc_init (r_reloc *r_rel, | |
4963 | bfd *abfd, | |
4964 | Elf_Internal_Rela *irel, | |
4965 | bfd_byte *contents, | |
4966 | bfd_size_type content_length) | |
4967 | { | |
4968 | int r_type; | |
4969 | reloc_howto_type *howto; | |
4970 | ||
4971 | if (irel) | |
4972 | { | |
4973 | r_rel->rela = *irel; | |
4974 | r_rel->abfd = abfd; | |
4975 | r_rel->target_offset = r_reloc_get_target_offset (r_rel); | |
4976 | r_rel->virtual_offset = 0; | |
4977 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
4978 | howto = &elf_howto_table[r_type]; | |
4979 | if (howto->partial_inplace) | |
4980 | { | |
4981 | bfd_vma inplace_val; | |
4982 | BFD_ASSERT (r_rel->rela.r_offset < content_length); | |
4983 | ||
4984 | inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]); | |
4985 | r_rel->target_offset += inplace_val; | |
4986 | } | |
4987 | } | |
4988 | else | |
4989 | memset (r_rel, 0, sizeof (r_reloc)); | |
4990 | } | |
4991 | ||
4992 | ||
43cd72b9 BW |
4993 | #if DEBUG |
4994 | ||
e0001a05 | 4995 | static void |
7fa3d080 | 4996 | print_r_reloc (FILE *fp, const r_reloc *r_rel) |
e0001a05 | 4997 | { |
43cd72b9 BW |
4998 | if (r_reloc_is_defined (r_rel)) |
4999 | { | |
5000 | asection *sec = r_reloc_get_section (r_rel); | |
5001 | fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name); | |
5002 | } | |
5003 | else if (r_reloc_get_hash_entry (r_rel)) | |
5004 | fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string); | |
5005 | else | |
5006 | fprintf (fp, " ?? + "); | |
e0001a05 | 5007 | |
43cd72b9 BW |
5008 | fprintf_vma (fp, r_rel->target_offset); |
5009 | if (r_rel->virtual_offset) | |
5010 | { | |
5011 | fprintf (fp, " + "); | |
5012 | fprintf_vma (fp, r_rel->virtual_offset); | |
5013 | } | |
5014 | ||
5015 | fprintf (fp, ")"); | |
5016 | } | |
e0001a05 | 5017 | |
43cd72b9 | 5018 | #endif /* DEBUG */ |
e0001a05 | 5019 | |
43cd72b9 BW |
5020 | \f |
5021 | /* source_reloc: relocations that reference literals. */ | |
e0001a05 | 5022 | |
43cd72b9 BW |
5023 | /* To determine whether literals can be coalesced, we need to first |
5024 | record all the relocations that reference the literals. The | |
5025 | source_reloc structure below is used for this purpose. The | |
5026 | source_reloc entries are kept in a per-literal-section array, sorted | |
5027 | by offset within the literal section (i.e., target offset). | |
e0001a05 | 5028 | |
43cd72b9 BW |
5029 | The source_sec and r_rel.rela.r_offset fields identify the source of |
5030 | the relocation. The r_rel field records the relocation value, i.e., | |
5031 | the offset of the literal being referenced. The opnd field is needed | |
5032 | to determine the range of the immediate field to which the relocation | |
5033 | applies, so we can determine whether another literal with the same | |
5034 | value is within range. The is_null field is true when the relocation | |
5035 | is being removed (e.g., when an L32R is being removed due to a CALLX | |
5036 | that is converted to a direct CALL). */ | |
e0001a05 | 5037 | |
43cd72b9 BW |
5038 | typedef struct source_reloc_struct source_reloc; |
5039 | ||
5040 | struct source_reloc_struct | |
e0001a05 | 5041 | { |
43cd72b9 BW |
5042 | asection *source_sec; |
5043 | r_reloc r_rel; | |
5044 | xtensa_opcode opcode; | |
5045 | int opnd; | |
5046 | bfd_boolean is_null; | |
5047 | bfd_boolean is_abs_literal; | |
5048 | }; | |
e0001a05 | 5049 | |
e0001a05 | 5050 | |
e0001a05 | 5051 | static void |
7fa3d080 BW |
5052 | init_source_reloc (source_reloc *reloc, |
5053 | asection *source_sec, | |
5054 | const r_reloc *r_rel, | |
5055 | xtensa_opcode opcode, | |
5056 | int opnd, | |
5057 | bfd_boolean is_abs_literal) | |
e0001a05 | 5058 | { |
43cd72b9 BW |
5059 | reloc->source_sec = source_sec; |
5060 | reloc->r_rel = *r_rel; | |
5061 | reloc->opcode = opcode; | |
5062 | reloc->opnd = opnd; | |
5063 | reloc->is_null = FALSE; | |
5064 | reloc->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
5065 | } |
5066 | ||
e0001a05 | 5067 | |
43cd72b9 BW |
5068 | /* Find the source_reloc for a particular source offset and relocation |
5069 | type. Note that the array is sorted by _target_ offset, so this is | |
5070 | just a linear search. */ | |
e0001a05 | 5071 | |
43cd72b9 | 5072 | static source_reloc * |
7fa3d080 BW |
5073 | find_source_reloc (source_reloc *src_relocs, |
5074 | int src_count, | |
5075 | asection *sec, | |
5076 | Elf_Internal_Rela *irel) | |
e0001a05 | 5077 | { |
43cd72b9 | 5078 | int i; |
e0001a05 | 5079 | |
43cd72b9 BW |
5080 | for (i = 0; i < src_count; i++) |
5081 | { | |
5082 | if (src_relocs[i].source_sec == sec | |
5083 | && src_relocs[i].r_rel.rela.r_offset == irel->r_offset | |
5084 | && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info) | |
5085 | == ELF32_R_TYPE (irel->r_info))) | |
5086 | return &src_relocs[i]; | |
5087 | } | |
e0001a05 | 5088 | |
43cd72b9 | 5089 | return NULL; |
e0001a05 NC |
5090 | } |
5091 | ||
5092 | ||
43cd72b9 | 5093 | static int |
7fa3d080 | 5094 | source_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 5095 | { |
43cd72b9 BW |
5096 | const source_reloc *a = (const source_reloc *) ap; |
5097 | const source_reloc *b = (const source_reloc *) bp; | |
e0001a05 | 5098 | |
43cd72b9 BW |
5099 | if (a->r_rel.target_offset != b->r_rel.target_offset) |
5100 | return (a->r_rel.target_offset - b->r_rel.target_offset); | |
e0001a05 | 5101 | |
43cd72b9 BW |
5102 | /* We don't need to sort on these criteria for correctness, |
5103 | but enforcing a more strict ordering prevents unstable qsort | |
5104 | from behaving differently with different implementations. | |
5105 | Without the code below we get correct but different results | |
5106 | on Solaris 2.7 and 2.8. We would like to always produce the | |
5107 | same results no matter the host. */ | |
5108 | ||
5109 | if ((!a->is_null) - (!b->is_null)) | |
5110 | return ((!a->is_null) - (!b->is_null)); | |
5111 | return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela); | |
e0001a05 NC |
5112 | } |
5113 | ||
43cd72b9 BW |
5114 | \f |
5115 | /* Literal values and value hash tables. */ | |
e0001a05 | 5116 | |
43cd72b9 BW |
5117 | /* Literals with the same value can be coalesced. The literal_value |
5118 | structure records the value of a literal: the "r_rel" field holds the | |
5119 | information from the relocation on the literal (if there is one) and | |
5120 | the "value" field holds the contents of the literal word itself. | |
e0001a05 | 5121 | |
43cd72b9 BW |
5122 | The value_map structure records a literal value along with the |
5123 | location of a literal holding that value. The value_map hash table | |
5124 | is indexed by the literal value, so that we can quickly check if a | |
5125 | particular literal value has been seen before and is thus a candidate | |
5126 | for coalescing. */ | |
e0001a05 | 5127 | |
43cd72b9 BW |
5128 | typedef struct literal_value_struct literal_value; |
5129 | typedef struct value_map_struct value_map; | |
5130 | typedef struct value_map_hash_table_struct value_map_hash_table; | |
e0001a05 | 5131 | |
43cd72b9 | 5132 | struct literal_value_struct |
e0001a05 | 5133 | { |
43cd72b9 BW |
5134 | r_reloc r_rel; |
5135 | unsigned long value; | |
5136 | bfd_boolean is_abs_literal; | |
5137 | }; | |
5138 | ||
5139 | struct value_map_struct | |
5140 | { | |
5141 | literal_value val; /* The literal value. */ | |
5142 | r_reloc loc; /* Location of the literal. */ | |
5143 | value_map *next; | |
5144 | }; | |
5145 | ||
5146 | struct value_map_hash_table_struct | |
5147 | { | |
5148 | unsigned bucket_count; | |
5149 | value_map **buckets; | |
5150 | unsigned count; | |
5151 | bfd_boolean has_last_loc; | |
5152 | r_reloc last_loc; | |
5153 | }; | |
5154 | ||
5155 | ||
e0001a05 | 5156 | static void |
7fa3d080 BW |
5157 | init_literal_value (literal_value *lit, |
5158 | const r_reloc *r_rel, | |
5159 | unsigned long value, | |
5160 | bfd_boolean is_abs_literal) | |
e0001a05 | 5161 | { |
43cd72b9 BW |
5162 | lit->r_rel = *r_rel; |
5163 | lit->value = value; | |
5164 | lit->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
5165 | } |
5166 | ||
5167 | ||
43cd72b9 | 5168 | static bfd_boolean |
7fa3d080 BW |
5169 | literal_value_equal (const literal_value *src1, |
5170 | const literal_value *src2, | |
5171 | bfd_boolean final_static_link) | |
e0001a05 | 5172 | { |
43cd72b9 | 5173 | struct elf_link_hash_entry *h1, *h2; |
e0001a05 | 5174 | |
43cd72b9 BW |
5175 | if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel)) |
5176 | return FALSE; | |
e0001a05 | 5177 | |
43cd72b9 BW |
5178 | if (r_reloc_is_const (&src1->r_rel)) |
5179 | return (src1->value == src2->value); | |
e0001a05 | 5180 | |
43cd72b9 BW |
5181 | if (ELF32_R_TYPE (src1->r_rel.rela.r_info) |
5182 | != ELF32_R_TYPE (src2->r_rel.rela.r_info)) | |
5183 | return FALSE; | |
e0001a05 | 5184 | |
43cd72b9 BW |
5185 | if (src1->r_rel.target_offset != src2->r_rel.target_offset) |
5186 | return FALSE; | |
5187 | ||
5188 | if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset) | |
5189 | return FALSE; | |
5190 | ||
5191 | if (src1->value != src2->value) | |
5192 | return FALSE; | |
5193 | ||
5194 | /* Now check for the same section (if defined) or the same elf_hash | |
5195 | (if undefined or weak). */ | |
5196 | h1 = r_reloc_get_hash_entry (&src1->r_rel); | |
5197 | h2 = r_reloc_get_hash_entry (&src2->r_rel); | |
5198 | if (r_reloc_is_defined (&src1->r_rel) | |
5199 | && (final_static_link | |
5200 | || ((!h1 || h1->root.type != bfd_link_hash_defweak) | |
5201 | && (!h2 || h2->root.type != bfd_link_hash_defweak)))) | |
5202 | { | |
5203 | if (r_reloc_get_section (&src1->r_rel) | |
5204 | != r_reloc_get_section (&src2->r_rel)) | |
5205 | return FALSE; | |
5206 | } | |
5207 | else | |
5208 | { | |
5209 | /* Require that the hash entries (i.e., symbols) be identical. */ | |
5210 | if (h1 != h2 || h1 == 0) | |
5211 | return FALSE; | |
5212 | } | |
5213 | ||
5214 | if (src1->is_abs_literal != src2->is_abs_literal) | |
5215 | return FALSE; | |
5216 | ||
5217 | return TRUE; | |
e0001a05 NC |
5218 | } |
5219 | ||
e0001a05 | 5220 | |
43cd72b9 BW |
5221 | /* Must be power of 2. */ |
5222 | #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024 | |
e0001a05 | 5223 | |
43cd72b9 | 5224 | static value_map_hash_table * |
7fa3d080 | 5225 | value_map_hash_table_init (void) |
43cd72b9 BW |
5226 | { |
5227 | value_map_hash_table *values; | |
e0001a05 | 5228 | |
43cd72b9 BW |
5229 | values = (value_map_hash_table *) |
5230 | bfd_zmalloc (sizeof (value_map_hash_table)); | |
5231 | values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT; | |
5232 | values->count = 0; | |
5233 | values->buckets = (value_map **) | |
5234 | bfd_zmalloc (sizeof (value_map *) * values->bucket_count); | |
5235 | if (values->buckets == NULL) | |
5236 | { | |
5237 | free (values); | |
5238 | return NULL; | |
5239 | } | |
5240 | values->has_last_loc = FALSE; | |
5241 | ||
5242 | return values; | |
5243 | } | |
5244 | ||
5245 | ||
5246 | static void | |
7fa3d080 | 5247 | value_map_hash_table_delete (value_map_hash_table *table) |
e0001a05 | 5248 | { |
43cd72b9 BW |
5249 | free (table->buckets); |
5250 | free (table); | |
5251 | } | |
5252 | ||
5253 | ||
5254 | static unsigned | |
7fa3d080 | 5255 | hash_bfd_vma (bfd_vma val) |
43cd72b9 BW |
5256 | { |
5257 | return (val >> 2) + (val >> 10); | |
5258 | } | |
5259 | ||
5260 | ||
5261 | static unsigned | |
7fa3d080 | 5262 | literal_value_hash (const literal_value *src) |
43cd72b9 BW |
5263 | { |
5264 | unsigned hash_val; | |
e0001a05 | 5265 | |
43cd72b9 BW |
5266 | hash_val = hash_bfd_vma (src->value); |
5267 | if (!r_reloc_is_const (&src->r_rel)) | |
e0001a05 | 5268 | { |
43cd72b9 BW |
5269 | void *sec_or_hash; |
5270 | ||
5271 | hash_val += hash_bfd_vma (src->is_abs_literal * 1000); | |
5272 | hash_val += hash_bfd_vma (src->r_rel.target_offset); | |
5273 | hash_val += hash_bfd_vma (src->r_rel.virtual_offset); | |
5274 | ||
5275 | /* Now check for the same section and the same elf_hash. */ | |
5276 | if (r_reloc_is_defined (&src->r_rel)) | |
5277 | sec_or_hash = r_reloc_get_section (&src->r_rel); | |
5278 | else | |
5279 | sec_or_hash = r_reloc_get_hash_entry (&src->r_rel); | |
f60ca5e3 | 5280 | hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash); |
e0001a05 | 5281 | } |
43cd72b9 BW |
5282 | return hash_val; |
5283 | } | |
e0001a05 | 5284 | |
e0001a05 | 5285 | |
43cd72b9 | 5286 | /* Check if the specified literal_value has been seen before. */ |
e0001a05 | 5287 | |
43cd72b9 | 5288 | static value_map * |
7fa3d080 BW |
5289 | value_map_get_cached_value (value_map_hash_table *map, |
5290 | const literal_value *val, | |
5291 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5292 | { |
5293 | value_map *map_e; | |
5294 | value_map *bucket; | |
5295 | unsigned idx; | |
5296 | ||
5297 | idx = literal_value_hash (val); | |
5298 | idx = idx & (map->bucket_count - 1); | |
5299 | bucket = map->buckets[idx]; | |
5300 | for (map_e = bucket; map_e; map_e = map_e->next) | |
e0001a05 | 5301 | { |
43cd72b9 BW |
5302 | if (literal_value_equal (&map_e->val, val, final_static_link)) |
5303 | return map_e; | |
5304 | } | |
5305 | return NULL; | |
5306 | } | |
e0001a05 | 5307 | |
e0001a05 | 5308 | |
43cd72b9 BW |
5309 | /* Record a new literal value. It is illegal to call this if VALUE |
5310 | already has an entry here. */ | |
5311 | ||
5312 | static value_map * | |
7fa3d080 BW |
5313 | add_value_map (value_map_hash_table *map, |
5314 | const literal_value *val, | |
5315 | const r_reloc *loc, | |
5316 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5317 | { |
5318 | value_map **bucket_p; | |
5319 | unsigned idx; | |
5320 | ||
5321 | value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map)); | |
5322 | if (val_e == NULL) | |
5323 | { | |
5324 | bfd_set_error (bfd_error_no_memory); | |
5325 | return NULL; | |
e0001a05 NC |
5326 | } |
5327 | ||
43cd72b9 BW |
5328 | BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link)); |
5329 | val_e->val = *val; | |
5330 | val_e->loc = *loc; | |
5331 | ||
5332 | idx = literal_value_hash (val); | |
5333 | idx = idx & (map->bucket_count - 1); | |
5334 | bucket_p = &map->buckets[idx]; | |
5335 | ||
5336 | val_e->next = *bucket_p; | |
5337 | *bucket_p = val_e; | |
5338 | map->count++; | |
5339 | /* FIXME: Consider resizing the hash table if we get too many entries. */ | |
5340 | ||
5341 | return val_e; | |
e0001a05 NC |
5342 | } |
5343 | ||
43cd72b9 BW |
5344 | \f |
5345 | /* Lists of text actions (ta_) for narrowing, widening, longcall | |
5346 | conversion, space fill, code & literal removal, etc. */ | |
5347 | ||
5348 | /* The following text actions are generated: | |
5349 | ||
5350 | "ta_remove_insn" remove an instruction or instructions | |
5351 | "ta_remove_longcall" convert longcall to call | |
5352 | "ta_convert_longcall" convert longcall to nop/call | |
5353 | "ta_narrow_insn" narrow a wide instruction | |
5354 | "ta_widen" widen a narrow instruction | |
5355 | "ta_fill" add fill or remove fill | |
5356 | removed < 0 is a fill; branches to the fill address will be | |
5357 | changed to address + fill size (e.g., address - removed) | |
5358 | removed >= 0 branches to the fill address will stay unchanged | |
5359 | "ta_remove_literal" remove a literal; this action is | |
5360 | indicated when a literal is removed | |
5361 | or replaced. | |
5362 | "ta_add_literal" insert a new literal; this action is | |
5363 | indicated when a literal has been moved. | |
5364 | It may use a virtual_offset because | |
5365 | multiple literals can be placed at the | |
5366 | same location. | |
5367 | ||
5368 | For each of these text actions, we also record the number of bytes | |
5369 | removed by performing the text action. In the case of a "ta_widen" | |
5370 | or a "ta_fill" that adds space, the removed_bytes will be negative. */ | |
5371 | ||
5372 | typedef struct text_action_struct text_action; | |
5373 | typedef struct text_action_list_struct text_action_list; | |
5374 | typedef enum text_action_enum_t text_action_t; | |
5375 | ||
5376 | enum text_action_enum_t | |
5377 | { | |
5378 | ta_none, | |
5379 | ta_remove_insn, /* removed = -size */ | |
5380 | ta_remove_longcall, /* removed = -size */ | |
5381 | ta_convert_longcall, /* removed = 0 */ | |
5382 | ta_narrow_insn, /* removed = -1 */ | |
5383 | ta_widen_insn, /* removed = +1 */ | |
5384 | ta_fill, /* removed = +size */ | |
5385 | ta_remove_literal, | |
5386 | ta_add_literal | |
5387 | }; | |
e0001a05 | 5388 | |
e0001a05 | 5389 | |
43cd72b9 BW |
5390 | /* Structure for a text action record. */ |
5391 | struct text_action_struct | |
e0001a05 | 5392 | { |
43cd72b9 BW |
5393 | text_action_t action; |
5394 | asection *sec; /* Optional */ | |
5395 | bfd_vma offset; | |
5396 | bfd_vma virtual_offset; /* Zero except for adding literals. */ | |
5397 | int removed_bytes; | |
5398 | literal_value value; /* Only valid when adding literals. */ | |
e0001a05 | 5399 | |
43cd72b9 BW |
5400 | text_action *next; |
5401 | }; | |
e0001a05 | 5402 | |
e0001a05 | 5403 | |
43cd72b9 BW |
5404 | /* List of all of the actions taken on a text section. */ |
5405 | struct text_action_list_struct | |
5406 | { | |
5407 | text_action *head; | |
5408 | }; | |
e0001a05 | 5409 | |
e0001a05 | 5410 | |
7fa3d080 BW |
5411 | static text_action * |
5412 | find_fill_action (text_action_list *l, asection *sec, bfd_vma offset) | |
43cd72b9 BW |
5413 | { |
5414 | text_action **m_p; | |
5415 | ||
5416 | /* It is not necessary to fill at the end of a section. */ | |
5417 | if (sec->size == offset) | |
5418 | return NULL; | |
5419 | ||
7fa3d080 | 5420 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
5421 | { |
5422 | text_action *t = *m_p; | |
5423 | /* When the action is another fill at the same address, | |
5424 | just increase the size. */ | |
5425 | if (t->offset == offset && t->action == ta_fill) | |
5426 | return t; | |
5427 | } | |
5428 | return NULL; | |
5429 | } | |
5430 | ||
5431 | ||
5432 | static int | |
7fa3d080 BW |
5433 | compute_removed_action_diff (const text_action *ta, |
5434 | asection *sec, | |
5435 | bfd_vma offset, | |
5436 | int removed, | |
5437 | int removable_space) | |
43cd72b9 BW |
5438 | { |
5439 | int new_removed; | |
5440 | int current_removed = 0; | |
5441 | ||
7fa3d080 | 5442 | if (ta) |
43cd72b9 BW |
5443 | current_removed = ta->removed_bytes; |
5444 | ||
5445 | BFD_ASSERT (ta == NULL || ta->offset == offset); | |
5446 | BFD_ASSERT (ta == NULL || ta->action == ta_fill); | |
5447 | ||
5448 | /* It is not necessary to fill at the end of a section. Clean this up. */ | |
5449 | if (sec->size == offset) | |
5450 | new_removed = removable_space - 0; | |
5451 | else | |
5452 | { | |
5453 | int space; | |
5454 | int added = -removed - current_removed; | |
5455 | /* Ignore multiples of the section alignment. */ | |
5456 | added = ((1 << sec->alignment_power) - 1) & added; | |
5457 | new_removed = (-added); | |
5458 | ||
5459 | /* Modify for removable. */ | |
5460 | space = removable_space - new_removed; | |
5461 | new_removed = (removable_space | |
5462 | - (((1 << sec->alignment_power) - 1) & space)); | |
5463 | } | |
5464 | return (new_removed - current_removed); | |
5465 | } | |
5466 | ||
5467 | ||
7fa3d080 BW |
5468 | static void |
5469 | adjust_fill_action (text_action *ta, int fill_diff) | |
43cd72b9 BW |
5470 | { |
5471 | ta->removed_bytes += fill_diff; | |
5472 | } | |
5473 | ||
5474 | ||
5475 | /* Add a modification action to the text. For the case of adding or | |
5476 | removing space, modify any current fill and assume that | |
5477 | "unreachable_space" bytes can be freely contracted. Note that a | |
5478 | negative removed value is a fill. */ | |
5479 | ||
5480 | static void | |
7fa3d080 BW |
5481 | text_action_add (text_action_list *l, |
5482 | text_action_t action, | |
5483 | asection *sec, | |
5484 | bfd_vma offset, | |
5485 | int removed) | |
43cd72b9 BW |
5486 | { |
5487 | text_action **m_p; | |
5488 | text_action *ta; | |
5489 | ||
5490 | /* It is not necessary to fill at the end of a section. */ | |
5491 | if (action == ta_fill && sec->size == offset) | |
5492 | return; | |
5493 | ||
5494 | /* It is not necessary to fill 0 bytes. */ | |
5495 | if (action == ta_fill && removed == 0) | |
5496 | return; | |
5497 | ||
7fa3d080 | 5498 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
5499 | { |
5500 | text_action *t = *m_p; | |
658ff993 SA |
5501 | |
5502 | if (action == ta_fill) | |
43cd72b9 | 5503 | { |
658ff993 SA |
5504 | /* When the action is another fill at the same address, |
5505 | just increase the size. */ | |
5506 | if (t->offset == offset && t->action == ta_fill) | |
5507 | { | |
5508 | t->removed_bytes += removed; | |
5509 | return; | |
5510 | } | |
5511 | /* Fills need to happen before widens so that we don't | |
5512 | insert fill bytes into the instruction stream. */ | |
5513 | if (t->offset == offset && t->action == ta_widen_insn) | |
5514 | break; | |
43cd72b9 BW |
5515 | } |
5516 | } | |
5517 | ||
5518 | /* Create a new record and fill it up. */ | |
5519 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
5520 | ta->action = action; | |
5521 | ta->sec = sec; | |
5522 | ta->offset = offset; | |
5523 | ta->removed_bytes = removed; | |
5524 | ta->next = (*m_p); | |
5525 | *m_p = ta; | |
5526 | } | |
5527 | ||
5528 | ||
5529 | static void | |
7fa3d080 BW |
5530 | text_action_add_literal (text_action_list *l, |
5531 | text_action_t action, | |
5532 | const r_reloc *loc, | |
5533 | const literal_value *value, | |
5534 | int removed) | |
43cd72b9 BW |
5535 | { |
5536 | text_action **m_p; | |
5537 | text_action *ta; | |
5538 | asection *sec = r_reloc_get_section (loc); | |
5539 | bfd_vma offset = loc->target_offset; | |
5540 | bfd_vma virtual_offset = loc->virtual_offset; | |
5541 | ||
5542 | BFD_ASSERT (action == ta_add_literal); | |
5543 | ||
5544 | for (m_p = &l->head; *m_p != NULL; m_p = &(*m_p)->next) | |
5545 | { | |
5546 | if ((*m_p)->offset > offset | |
5547 | && ((*m_p)->offset != offset | |
5548 | || (*m_p)->virtual_offset > virtual_offset)) | |
5549 | break; | |
5550 | } | |
5551 | ||
5552 | /* Create a new record and fill it up. */ | |
5553 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
5554 | ta->action = action; | |
5555 | ta->sec = sec; | |
5556 | ta->offset = offset; | |
5557 | ta->virtual_offset = virtual_offset; | |
5558 | ta->value = *value; | |
5559 | ta->removed_bytes = removed; | |
5560 | ta->next = (*m_p); | |
5561 | *m_p = ta; | |
5562 | } | |
5563 | ||
5564 | ||
03669f1c BW |
5565 | /* Find the total offset adjustment for the relaxations specified by |
5566 | text_actions, beginning from a particular starting action. This is | |
5567 | typically used from offset_with_removed_text to search an entire list of | |
5568 | actions, but it may also be called directly when adjusting adjacent offsets | |
5569 | so that each search may begin where the previous one left off. */ | |
5570 | ||
5571 | static int | |
5572 | removed_by_actions (text_action **p_start_action, | |
5573 | bfd_vma offset, | |
5574 | bfd_boolean before_fill) | |
43cd72b9 BW |
5575 | { |
5576 | text_action *r; | |
5577 | int removed = 0; | |
5578 | ||
03669f1c BW |
5579 | r = *p_start_action; |
5580 | while (r) | |
43cd72b9 | 5581 | { |
03669f1c BW |
5582 | if (r->offset > offset) |
5583 | break; | |
5584 | ||
5585 | if (r->offset == offset | |
5586 | && (before_fill || r->action != ta_fill || r->removed_bytes >= 0)) | |
5587 | break; | |
5588 | ||
5589 | removed += r->removed_bytes; | |
5590 | ||
5591 | r = r->next; | |
43cd72b9 BW |
5592 | } |
5593 | ||
03669f1c BW |
5594 | *p_start_action = r; |
5595 | return removed; | |
5596 | } | |
5597 | ||
5598 | ||
5599 | static bfd_vma | |
5600 | offset_with_removed_text (text_action_list *action_list, bfd_vma offset) | |
5601 | { | |
5602 | text_action *r = action_list->head; | |
5603 | return offset - removed_by_actions (&r, offset, FALSE); | |
43cd72b9 BW |
5604 | } |
5605 | ||
5606 | ||
03e94c08 BW |
5607 | static unsigned |
5608 | action_list_count (text_action_list *action_list) | |
5609 | { | |
5610 | text_action *r = action_list->head; | |
5611 | unsigned count = 0; | |
5612 | for (r = action_list->head; r != NULL; r = r->next) | |
5613 | { | |
5614 | count++; | |
5615 | } | |
5616 | return count; | |
5617 | } | |
5618 | ||
5619 | ||
43cd72b9 BW |
5620 | /* The find_insn_action routine will only find non-fill actions. */ |
5621 | ||
7fa3d080 BW |
5622 | static text_action * |
5623 | find_insn_action (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 BW |
5624 | { |
5625 | text_action *t; | |
5626 | for (t = action_list->head; t; t = t->next) | |
5627 | { | |
5628 | if (t->offset == offset) | |
5629 | { | |
5630 | switch (t->action) | |
5631 | { | |
5632 | case ta_none: | |
5633 | case ta_fill: | |
5634 | break; | |
5635 | case ta_remove_insn: | |
5636 | case ta_remove_longcall: | |
5637 | case ta_convert_longcall: | |
5638 | case ta_narrow_insn: | |
5639 | case ta_widen_insn: | |
5640 | return t; | |
5641 | case ta_remove_literal: | |
5642 | case ta_add_literal: | |
5643 | BFD_ASSERT (0); | |
5644 | break; | |
5645 | } | |
5646 | } | |
5647 | } | |
5648 | return NULL; | |
5649 | } | |
5650 | ||
5651 | ||
5652 | #if DEBUG | |
5653 | ||
5654 | static void | |
7fa3d080 | 5655 | print_action_list (FILE *fp, text_action_list *action_list) |
43cd72b9 BW |
5656 | { |
5657 | text_action *r; | |
5658 | ||
5659 | fprintf (fp, "Text Action\n"); | |
5660 | for (r = action_list->head; r != NULL; r = r->next) | |
5661 | { | |
5662 | const char *t = "unknown"; | |
5663 | switch (r->action) | |
5664 | { | |
5665 | case ta_remove_insn: | |
5666 | t = "remove_insn"; break; | |
5667 | case ta_remove_longcall: | |
5668 | t = "remove_longcall"; break; | |
5669 | case ta_convert_longcall: | |
c46082c8 | 5670 | t = "convert_longcall"; break; |
43cd72b9 BW |
5671 | case ta_narrow_insn: |
5672 | t = "narrow_insn"; break; | |
5673 | case ta_widen_insn: | |
5674 | t = "widen_insn"; break; | |
5675 | case ta_fill: | |
5676 | t = "fill"; break; | |
5677 | case ta_none: | |
5678 | t = "none"; break; | |
5679 | case ta_remove_literal: | |
5680 | t = "remove_literal"; break; | |
5681 | case ta_add_literal: | |
5682 | t = "add_literal"; break; | |
5683 | } | |
5684 | ||
5685 | fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n", | |
5686 | r->sec->owner->filename, | |
5687 | r->sec->name, r->offset, t, r->removed_bytes); | |
5688 | } | |
5689 | } | |
5690 | ||
5691 | #endif /* DEBUG */ | |
5692 | ||
5693 | \f | |
5694 | /* Lists of literals being coalesced or removed. */ | |
5695 | ||
5696 | /* In the usual case, the literal identified by "from" is being | |
5697 | coalesced with another literal identified by "to". If the literal is | |
5698 | unused and is being removed altogether, "to.abfd" will be NULL. | |
5699 | The removed_literal entries are kept on a per-section list, sorted | |
5700 | by the "from" offset field. */ | |
5701 | ||
5702 | typedef struct removed_literal_struct removed_literal; | |
5703 | typedef struct removed_literal_list_struct removed_literal_list; | |
5704 | ||
5705 | struct removed_literal_struct | |
5706 | { | |
5707 | r_reloc from; | |
5708 | r_reloc to; | |
5709 | removed_literal *next; | |
5710 | }; | |
5711 | ||
5712 | struct removed_literal_list_struct | |
5713 | { | |
5714 | removed_literal *head; | |
5715 | removed_literal *tail; | |
5716 | }; | |
5717 | ||
5718 | ||
43cd72b9 BW |
5719 | /* Record that the literal at "from" is being removed. If "to" is not |
5720 | NULL, the "from" literal is being coalesced with the "to" literal. */ | |
5721 | ||
5722 | static void | |
7fa3d080 BW |
5723 | add_removed_literal (removed_literal_list *removed_list, |
5724 | const r_reloc *from, | |
5725 | const r_reloc *to) | |
43cd72b9 BW |
5726 | { |
5727 | removed_literal *r, *new_r, *next_r; | |
5728 | ||
5729 | new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal)); | |
5730 | ||
5731 | new_r->from = *from; | |
5732 | if (to) | |
5733 | new_r->to = *to; | |
5734 | else | |
5735 | new_r->to.abfd = NULL; | |
5736 | new_r->next = NULL; | |
5737 | ||
5738 | r = removed_list->head; | |
5739 | if (r == NULL) | |
5740 | { | |
5741 | removed_list->head = new_r; | |
5742 | removed_list->tail = new_r; | |
5743 | } | |
5744 | /* Special check for common case of append. */ | |
5745 | else if (removed_list->tail->from.target_offset < from->target_offset) | |
5746 | { | |
5747 | removed_list->tail->next = new_r; | |
5748 | removed_list->tail = new_r; | |
5749 | } | |
5750 | else | |
5751 | { | |
7fa3d080 | 5752 | while (r->from.target_offset < from->target_offset && r->next) |
43cd72b9 BW |
5753 | { |
5754 | r = r->next; | |
5755 | } | |
5756 | next_r = r->next; | |
5757 | r->next = new_r; | |
5758 | new_r->next = next_r; | |
5759 | if (next_r == NULL) | |
5760 | removed_list->tail = new_r; | |
5761 | } | |
5762 | } | |
5763 | ||
5764 | ||
5765 | /* Check if the list of removed literals contains an entry for the | |
5766 | given address. Return the entry if found. */ | |
5767 | ||
5768 | static removed_literal * | |
7fa3d080 | 5769 | find_removed_literal (removed_literal_list *removed_list, bfd_vma addr) |
43cd72b9 BW |
5770 | { |
5771 | removed_literal *r = removed_list->head; | |
5772 | while (r && r->from.target_offset < addr) | |
5773 | r = r->next; | |
5774 | if (r && r->from.target_offset == addr) | |
5775 | return r; | |
5776 | return NULL; | |
5777 | } | |
5778 | ||
5779 | ||
5780 | #if DEBUG | |
5781 | ||
5782 | static void | |
7fa3d080 | 5783 | print_removed_literals (FILE *fp, removed_literal_list *removed_list) |
43cd72b9 BW |
5784 | { |
5785 | removed_literal *r; | |
5786 | r = removed_list->head; | |
5787 | if (r) | |
5788 | fprintf (fp, "Removed Literals\n"); | |
5789 | for (; r != NULL; r = r->next) | |
5790 | { | |
5791 | print_r_reloc (fp, &r->from); | |
5792 | fprintf (fp, " => "); | |
5793 | if (r->to.abfd == NULL) | |
5794 | fprintf (fp, "REMOVED"); | |
5795 | else | |
5796 | print_r_reloc (fp, &r->to); | |
5797 | fprintf (fp, "\n"); | |
5798 | } | |
5799 | } | |
5800 | ||
5801 | #endif /* DEBUG */ | |
5802 | ||
5803 | \f | |
5804 | /* Per-section data for relaxation. */ | |
5805 | ||
5806 | typedef struct reloc_bfd_fix_struct reloc_bfd_fix; | |
5807 | ||
5808 | struct xtensa_relax_info_struct | |
5809 | { | |
5810 | bfd_boolean is_relaxable_literal_section; | |
5811 | bfd_boolean is_relaxable_asm_section; | |
5812 | int visited; /* Number of times visited. */ | |
5813 | ||
5814 | source_reloc *src_relocs; /* Array[src_count]. */ | |
5815 | int src_count; | |
5816 | int src_next; /* Next src_relocs entry to assign. */ | |
5817 | ||
5818 | removed_literal_list removed_list; | |
5819 | text_action_list action_list; | |
5820 | ||
5821 | reloc_bfd_fix *fix_list; | |
5822 | reloc_bfd_fix *fix_array; | |
5823 | unsigned fix_array_count; | |
5824 | ||
5825 | /* Support for expanding the reloc array that is stored | |
5826 | in the section structure. If the relocations have been | |
5827 | reallocated, the newly allocated relocations will be referenced | |
5828 | here along with the actual size allocated. The relocation | |
5829 | count will always be found in the section structure. */ | |
5830 | Elf_Internal_Rela *allocated_relocs; | |
5831 | unsigned relocs_count; | |
5832 | unsigned allocated_relocs_count; | |
5833 | }; | |
5834 | ||
5835 | struct elf_xtensa_section_data | |
5836 | { | |
5837 | struct bfd_elf_section_data elf; | |
5838 | xtensa_relax_info relax_info; | |
5839 | }; | |
5840 | ||
43cd72b9 BW |
5841 | |
5842 | static bfd_boolean | |
7fa3d080 | 5843 | elf_xtensa_new_section_hook (bfd *abfd, asection *sec) |
43cd72b9 | 5844 | { |
f592407e AM |
5845 | if (!sec->used_by_bfd) |
5846 | { | |
5847 | struct elf_xtensa_section_data *sdata; | |
5848 | bfd_size_type amt = sizeof (*sdata); | |
43cd72b9 | 5849 | |
f592407e AM |
5850 | sdata = bfd_zalloc (abfd, amt); |
5851 | if (sdata == NULL) | |
5852 | return FALSE; | |
5853 | sec->used_by_bfd = sdata; | |
5854 | } | |
43cd72b9 BW |
5855 | |
5856 | return _bfd_elf_new_section_hook (abfd, sec); | |
5857 | } | |
5858 | ||
5859 | ||
7fa3d080 BW |
5860 | static xtensa_relax_info * |
5861 | get_xtensa_relax_info (asection *sec) | |
5862 | { | |
5863 | struct elf_xtensa_section_data *section_data; | |
5864 | ||
5865 | /* No info available if no section or if it is an output section. */ | |
5866 | if (!sec || sec == sec->output_section) | |
5867 | return NULL; | |
5868 | ||
5869 | section_data = (struct elf_xtensa_section_data *) elf_section_data (sec); | |
5870 | return §ion_data->relax_info; | |
5871 | } | |
5872 | ||
5873 | ||
43cd72b9 | 5874 | static void |
7fa3d080 | 5875 | init_xtensa_relax_info (asection *sec) |
43cd72b9 BW |
5876 | { |
5877 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5878 | ||
5879 | relax_info->is_relaxable_literal_section = FALSE; | |
5880 | relax_info->is_relaxable_asm_section = FALSE; | |
5881 | relax_info->visited = 0; | |
5882 | ||
5883 | relax_info->src_relocs = NULL; | |
5884 | relax_info->src_count = 0; | |
5885 | relax_info->src_next = 0; | |
5886 | ||
5887 | relax_info->removed_list.head = NULL; | |
5888 | relax_info->removed_list.tail = NULL; | |
5889 | ||
5890 | relax_info->action_list.head = NULL; | |
5891 | ||
5892 | relax_info->fix_list = NULL; | |
5893 | relax_info->fix_array = NULL; | |
5894 | relax_info->fix_array_count = 0; | |
5895 | ||
5896 | relax_info->allocated_relocs = NULL; | |
5897 | relax_info->relocs_count = 0; | |
5898 | relax_info->allocated_relocs_count = 0; | |
5899 | } | |
5900 | ||
43cd72b9 BW |
5901 | \f |
5902 | /* Coalescing literals may require a relocation to refer to a section in | |
5903 | a different input file, but the standard relocation information | |
5904 | cannot express that. Instead, the reloc_bfd_fix structures are used | |
5905 | to "fix" the relocations that refer to sections in other input files. | |
5906 | These structures are kept on per-section lists. The "src_type" field | |
5907 | records the relocation type in case there are multiple relocations on | |
5908 | the same location. FIXME: This is ugly; an alternative might be to | |
5909 | add new symbols with the "owner" field to some other input file. */ | |
5910 | ||
5911 | struct reloc_bfd_fix_struct | |
5912 | { | |
5913 | asection *src_sec; | |
5914 | bfd_vma src_offset; | |
5915 | unsigned src_type; /* Relocation type. */ | |
5916 | ||
43cd72b9 BW |
5917 | asection *target_sec; |
5918 | bfd_vma target_offset; | |
5919 | bfd_boolean translated; | |
5920 | ||
5921 | reloc_bfd_fix *next; | |
5922 | }; | |
5923 | ||
5924 | ||
43cd72b9 | 5925 | static reloc_bfd_fix * |
7fa3d080 BW |
5926 | reloc_bfd_fix_init (asection *src_sec, |
5927 | bfd_vma src_offset, | |
5928 | unsigned src_type, | |
7fa3d080 BW |
5929 | asection *target_sec, |
5930 | bfd_vma target_offset, | |
5931 | bfd_boolean translated) | |
43cd72b9 BW |
5932 | { |
5933 | reloc_bfd_fix *fix; | |
5934 | ||
5935 | fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix)); | |
5936 | fix->src_sec = src_sec; | |
5937 | fix->src_offset = src_offset; | |
5938 | fix->src_type = src_type; | |
43cd72b9 BW |
5939 | fix->target_sec = target_sec; |
5940 | fix->target_offset = target_offset; | |
5941 | fix->translated = translated; | |
5942 | ||
5943 | return fix; | |
5944 | } | |
5945 | ||
5946 | ||
5947 | static void | |
7fa3d080 | 5948 | add_fix (asection *src_sec, reloc_bfd_fix *fix) |
43cd72b9 BW |
5949 | { |
5950 | xtensa_relax_info *relax_info; | |
5951 | ||
5952 | relax_info = get_xtensa_relax_info (src_sec); | |
5953 | fix->next = relax_info->fix_list; | |
5954 | relax_info->fix_list = fix; | |
5955 | } | |
5956 | ||
5957 | ||
5958 | static int | |
7fa3d080 | 5959 | fix_compare (const void *ap, const void *bp) |
43cd72b9 BW |
5960 | { |
5961 | const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap; | |
5962 | const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp; | |
5963 | ||
5964 | if (a->src_offset != b->src_offset) | |
5965 | return (a->src_offset - b->src_offset); | |
5966 | return (a->src_type - b->src_type); | |
5967 | } | |
5968 | ||
5969 | ||
5970 | static void | |
7fa3d080 | 5971 | cache_fix_array (asection *sec) |
43cd72b9 BW |
5972 | { |
5973 | unsigned i, count = 0; | |
5974 | reloc_bfd_fix *r; | |
5975 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5976 | ||
5977 | if (relax_info == NULL) | |
5978 | return; | |
5979 | if (relax_info->fix_list == NULL) | |
5980 | return; | |
5981 | ||
5982 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
5983 | count++; | |
5984 | ||
5985 | relax_info->fix_array = | |
5986 | (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count); | |
5987 | relax_info->fix_array_count = count; | |
5988 | ||
5989 | r = relax_info->fix_list; | |
5990 | for (i = 0; i < count; i++, r = r->next) | |
5991 | { | |
5992 | relax_info->fix_array[count - 1 - i] = *r; | |
5993 | relax_info->fix_array[count - 1 - i].next = NULL; | |
5994 | } | |
5995 | ||
5996 | qsort (relax_info->fix_array, relax_info->fix_array_count, | |
5997 | sizeof (reloc_bfd_fix), fix_compare); | |
5998 | } | |
5999 | ||
6000 | ||
6001 | static reloc_bfd_fix * | |
7fa3d080 | 6002 | get_bfd_fix (asection *sec, bfd_vma offset, unsigned type) |
43cd72b9 BW |
6003 | { |
6004 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
6005 | reloc_bfd_fix *rv; | |
6006 | reloc_bfd_fix key; | |
6007 | ||
6008 | if (relax_info == NULL) | |
6009 | return NULL; | |
6010 | if (relax_info->fix_list == NULL) | |
6011 | return NULL; | |
6012 | ||
6013 | if (relax_info->fix_array == NULL) | |
6014 | cache_fix_array (sec); | |
6015 | ||
6016 | key.src_offset = offset; | |
6017 | key.src_type = type; | |
6018 | rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count, | |
6019 | sizeof (reloc_bfd_fix), fix_compare); | |
6020 | return rv; | |
6021 | } | |
6022 | ||
6023 | \f | |
6024 | /* Section caching. */ | |
6025 | ||
6026 | typedef struct section_cache_struct section_cache_t; | |
6027 | ||
6028 | struct section_cache_struct | |
6029 | { | |
6030 | asection *sec; | |
6031 | ||
6032 | bfd_byte *contents; /* Cache of the section contents. */ | |
6033 | bfd_size_type content_length; | |
6034 | ||
6035 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6036 | unsigned pte_count; | |
6037 | ||
6038 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6039 | unsigned reloc_count; | |
6040 | }; | |
6041 | ||
6042 | ||
7fa3d080 BW |
6043 | static void |
6044 | init_section_cache (section_cache_t *sec_cache) | |
6045 | { | |
6046 | memset (sec_cache, 0, sizeof (*sec_cache)); | |
6047 | } | |
43cd72b9 BW |
6048 | |
6049 | ||
6050 | static void | |
7fa3d080 | 6051 | clear_section_cache (section_cache_t *sec_cache) |
43cd72b9 | 6052 | { |
7fa3d080 BW |
6053 | if (sec_cache->sec) |
6054 | { | |
6055 | release_contents (sec_cache->sec, sec_cache->contents); | |
6056 | release_internal_relocs (sec_cache->sec, sec_cache->relocs); | |
6057 | if (sec_cache->ptbl) | |
6058 | free (sec_cache->ptbl); | |
6059 | memset (sec_cache, 0, sizeof (sec_cache)); | |
6060 | } | |
43cd72b9 BW |
6061 | } |
6062 | ||
6063 | ||
6064 | static bfd_boolean | |
7fa3d080 BW |
6065 | section_cache_section (section_cache_t *sec_cache, |
6066 | asection *sec, | |
6067 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6068 | { |
6069 | bfd *abfd; | |
6070 | property_table_entry *prop_table = NULL; | |
6071 | int ptblsize = 0; | |
6072 | bfd_byte *contents = NULL; | |
6073 | Elf_Internal_Rela *internal_relocs = NULL; | |
6074 | bfd_size_type sec_size; | |
6075 | ||
6076 | if (sec == NULL) | |
6077 | return FALSE; | |
6078 | if (sec == sec_cache->sec) | |
6079 | return TRUE; | |
6080 | ||
6081 | abfd = sec->owner; | |
6082 | sec_size = bfd_get_section_limit (abfd, sec); | |
6083 | ||
6084 | /* Get the contents. */ | |
6085 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6086 | if (contents == NULL && sec_size != 0) | |
6087 | goto err; | |
6088 | ||
6089 | /* Get the relocations. */ | |
6090 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6091 | link_info->keep_memory); | |
6092 | ||
6093 | /* Get the entry table. */ | |
6094 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, | |
6095 | XTENSA_PROP_SEC_NAME, FALSE); | |
6096 | if (ptblsize < 0) | |
6097 | goto err; | |
6098 | ||
6099 | /* Fill in the new section cache. */ | |
6100 | clear_section_cache (sec_cache); | |
6101 | memset (sec_cache, 0, sizeof (sec_cache)); | |
6102 | ||
6103 | sec_cache->sec = sec; | |
6104 | sec_cache->contents = contents; | |
6105 | sec_cache->content_length = sec_size; | |
6106 | sec_cache->relocs = internal_relocs; | |
6107 | sec_cache->reloc_count = sec->reloc_count; | |
6108 | sec_cache->pte_count = ptblsize; | |
6109 | sec_cache->ptbl = prop_table; | |
6110 | ||
6111 | return TRUE; | |
6112 | ||
6113 | err: | |
6114 | release_contents (sec, contents); | |
6115 | release_internal_relocs (sec, internal_relocs); | |
6116 | if (prop_table) | |
6117 | free (prop_table); | |
6118 | return FALSE; | |
6119 | } | |
6120 | ||
43cd72b9 BW |
6121 | \f |
6122 | /* Extended basic blocks. */ | |
6123 | ||
6124 | /* An ebb_struct represents an Extended Basic Block. Within this | |
6125 | range, we guarantee that all instructions are decodable, the | |
6126 | property table entries are contiguous, and no property table | |
6127 | specifies a segment that cannot have instructions moved. This | |
6128 | structure contains caches of the contents, property table and | |
6129 | relocations for the specified section for easy use. The range is | |
6130 | specified by ranges of indices for the byte offset, property table | |
6131 | offsets and relocation offsets. These must be consistent. */ | |
6132 | ||
6133 | typedef struct ebb_struct ebb_t; | |
6134 | ||
6135 | struct ebb_struct | |
6136 | { | |
6137 | asection *sec; | |
6138 | ||
6139 | bfd_byte *contents; /* Cache of the section contents. */ | |
6140 | bfd_size_type content_length; | |
6141 | ||
6142 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6143 | unsigned pte_count; | |
6144 | ||
6145 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6146 | unsigned reloc_count; | |
6147 | ||
6148 | bfd_vma start_offset; /* Offset in section. */ | |
6149 | unsigned start_ptbl_idx; /* Offset in the property table. */ | |
6150 | unsigned start_reloc_idx; /* Offset in the relocations. */ | |
6151 | ||
6152 | bfd_vma end_offset; | |
6153 | unsigned end_ptbl_idx; | |
6154 | unsigned end_reloc_idx; | |
6155 | ||
6156 | bfd_boolean ends_section; /* Is this the last ebb in a section? */ | |
6157 | ||
6158 | /* The unreachable property table at the end of this set of blocks; | |
6159 | NULL if the end is not an unreachable block. */ | |
6160 | property_table_entry *ends_unreachable; | |
6161 | }; | |
6162 | ||
6163 | ||
6164 | enum ebb_target_enum | |
6165 | { | |
6166 | EBB_NO_ALIGN = 0, | |
6167 | EBB_DESIRE_TGT_ALIGN, | |
6168 | EBB_REQUIRE_TGT_ALIGN, | |
6169 | EBB_REQUIRE_LOOP_ALIGN, | |
6170 | EBB_REQUIRE_ALIGN | |
6171 | }; | |
6172 | ||
6173 | ||
6174 | /* proposed_action_struct is similar to the text_action_struct except | |
6175 | that is represents a potential transformation, not one that will | |
6176 | occur. We build a list of these for an extended basic block | |
6177 | and use them to compute the actual actions desired. We must be | |
6178 | careful that the entire set of actual actions we perform do not | |
6179 | break any relocations that would fit if the actions were not | |
6180 | performed. */ | |
6181 | ||
6182 | typedef struct proposed_action_struct proposed_action; | |
6183 | ||
6184 | struct proposed_action_struct | |
6185 | { | |
6186 | enum ebb_target_enum align_type; /* for the target alignment */ | |
6187 | bfd_vma alignment_pow; | |
6188 | text_action_t action; | |
6189 | bfd_vma offset; | |
6190 | int removed_bytes; | |
6191 | bfd_boolean do_action; /* If false, then we will not perform the action. */ | |
6192 | }; | |
6193 | ||
6194 | ||
6195 | /* The ebb_constraint_struct keeps a set of proposed actions for an | |
6196 | extended basic block. */ | |
6197 | ||
6198 | typedef struct ebb_constraint_struct ebb_constraint; | |
6199 | ||
6200 | struct ebb_constraint_struct | |
6201 | { | |
6202 | ebb_t ebb; | |
6203 | bfd_boolean start_movable; | |
6204 | ||
6205 | /* Bytes of extra space at the beginning if movable. */ | |
6206 | int start_extra_space; | |
6207 | ||
6208 | enum ebb_target_enum start_align; | |
6209 | ||
6210 | bfd_boolean end_movable; | |
6211 | ||
6212 | /* Bytes of extra space at the end if movable. */ | |
6213 | int end_extra_space; | |
6214 | ||
6215 | unsigned action_count; | |
6216 | unsigned action_allocated; | |
6217 | ||
6218 | /* Array of proposed actions. */ | |
6219 | proposed_action *actions; | |
6220 | ||
6221 | /* Action alignments -- one for each proposed action. */ | |
6222 | enum ebb_target_enum *action_aligns; | |
6223 | }; | |
6224 | ||
6225 | ||
43cd72b9 | 6226 | static void |
7fa3d080 | 6227 | init_ebb_constraint (ebb_constraint *c) |
43cd72b9 BW |
6228 | { |
6229 | memset (c, 0, sizeof (ebb_constraint)); | |
6230 | } | |
6231 | ||
6232 | ||
6233 | static void | |
7fa3d080 | 6234 | free_ebb_constraint (ebb_constraint *c) |
43cd72b9 | 6235 | { |
7fa3d080 | 6236 | if (c->actions) |
43cd72b9 BW |
6237 | free (c->actions); |
6238 | } | |
6239 | ||
6240 | ||
6241 | static void | |
7fa3d080 BW |
6242 | init_ebb (ebb_t *ebb, |
6243 | asection *sec, | |
6244 | bfd_byte *contents, | |
6245 | bfd_size_type content_length, | |
6246 | property_table_entry *prop_table, | |
6247 | unsigned ptblsize, | |
6248 | Elf_Internal_Rela *internal_relocs, | |
6249 | unsigned reloc_count) | |
43cd72b9 BW |
6250 | { |
6251 | memset (ebb, 0, sizeof (ebb_t)); | |
6252 | ebb->sec = sec; | |
6253 | ebb->contents = contents; | |
6254 | ebb->content_length = content_length; | |
6255 | ebb->ptbl = prop_table; | |
6256 | ebb->pte_count = ptblsize; | |
6257 | ebb->relocs = internal_relocs; | |
6258 | ebb->reloc_count = reloc_count; | |
6259 | ebb->start_offset = 0; | |
6260 | ebb->end_offset = ebb->content_length - 1; | |
6261 | ebb->start_ptbl_idx = 0; | |
6262 | ebb->end_ptbl_idx = ptblsize; | |
6263 | ebb->start_reloc_idx = 0; | |
6264 | ebb->end_reloc_idx = reloc_count; | |
6265 | } | |
6266 | ||
6267 | ||
6268 | /* Extend the ebb to all decodable contiguous sections. The algorithm | |
6269 | for building a basic block around an instruction is to push it | |
6270 | forward until we hit the end of a section, an unreachable block or | |
6271 | a block that cannot be transformed. Then we push it backwards | |
6272 | searching for similar conditions. */ | |
6273 | ||
7fa3d080 BW |
6274 | static bfd_boolean extend_ebb_bounds_forward (ebb_t *); |
6275 | static bfd_boolean extend_ebb_bounds_backward (ebb_t *); | |
6276 | static bfd_size_type insn_block_decodable_len | |
6277 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type); | |
6278 | ||
43cd72b9 | 6279 | static bfd_boolean |
7fa3d080 | 6280 | extend_ebb_bounds (ebb_t *ebb) |
43cd72b9 BW |
6281 | { |
6282 | if (!extend_ebb_bounds_forward (ebb)) | |
6283 | return FALSE; | |
6284 | if (!extend_ebb_bounds_backward (ebb)) | |
6285 | return FALSE; | |
6286 | return TRUE; | |
6287 | } | |
6288 | ||
6289 | ||
6290 | static bfd_boolean | |
7fa3d080 | 6291 | extend_ebb_bounds_forward (ebb_t *ebb) |
43cd72b9 BW |
6292 | { |
6293 | property_table_entry *the_entry, *new_entry; | |
6294 | ||
6295 | the_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
6296 | ||
6297 | /* Stop when (1) we cannot decode an instruction, (2) we are at | |
6298 | the end of the property tables, (3) we hit a non-contiguous property | |
6299 | table entry, (4) we hit a NO_TRANSFORM region. */ | |
6300 | ||
6301 | while (1) | |
6302 | { | |
6303 | bfd_vma entry_end; | |
6304 | bfd_size_type insn_block_len; | |
6305 | ||
6306 | entry_end = the_entry->address - ebb->sec->vma + the_entry->size; | |
6307 | insn_block_len = | |
6308 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6309 | ebb->end_offset, | |
6310 | entry_end - ebb->end_offset); | |
6311 | if (insn_block_len != (entry_end - ebb->end_offset)) | |
6312 | { | |
6313 | (*_bfd_error_handler) | |
6314 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6315 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
6316 | return FALSE; | |
6317 | } | |
6318 | ebb->end_offset += insn_block_len; | |
6319 | ||
6320 | if (ebb->end_offset == ebb->sec->size) | |
6321 | ebb->ends_section = TRUE; | |
6322 | ||
6323 | /* Update the reloc counter. */ | |
6324 | while (ebb->end_reloc_idx + 1 < ebb->reloc_count | |
6325 | && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset | |
6326 | < ebb->end_offset)) | |
6327 | { | |
6328 | ebb->end_reloc_idx++; | |
6329 | } | |
6330 | ||
6331 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6332 | return TRUE; | |
6333 | ||
6334 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6335 | if (((new_entry->flags & XTENSA_PROP_INSN) == 0) | |
99ded152 | 6336 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6337 | || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6338 | break; | |
6339 | ||
6340 | if (the_entry->address + the_entry->size != new_entry->address) | |
6341 | break; | |
6342 | ||
6343 | the_entry = new_entry; | |
6344 | ebb->end_ptbl_idx++; | |
6345 | } | |
6346 | ||
6347 | /* Quick check for an unreachable or end of file just at the end. */ | |
6348 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6349 | { | |
6350 | if (ebb->end_offset == ebb->content_length) | |
6351 | ebb->ends_section = TRUE; | |
6352 | } | |
6353 | else | |
6354 | { | |
6355 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6356 | if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0 | |
6357 | && the_entry->address + the_entry->size == new_entry->address) | |
6358 | ebb->ends_unreachable = new_entry; | |
6359 | } | |
6360 | ||
6361 | /* Any other ending requires exact alignment. */ | |
6362 | return TRUE; | |
6363 | } | |
6364 | ||
6365 | ||
6366 | static bfd_boolean | |
7fa3d080 | 6367 | extend_ebb_bounds_backward (ebb_t *ebb) |
43cd72b9 BW |
6368 | { |
6369 | property_table_entry *the_entry, *new_entry; | |
6370 | ||
6371 | the_entry = &ebb->ptbl[ebb->start_ptbl_idx]; | |
6372 | ||
6373 | /* Stop when (1) we cannot decode the instructions in the current entry. | |
6374 | (2) we are at the beginning of the property tables, (3) we hit a | |
6375 | non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */ | |
6376 | ||
6377 | while (1) | |
6378 | { | |
6379 | bfd_vma block_begin; | |
6380 | bfd_size_type insn_block_len; | |
6381 | ||
6382 | block_begin = the_entry->address - ebb->sec->vma; | |
6383 | insn_block_len = | |
6384 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6385 | block_begin, | |
6386 | ebb->start_offset - block_begin); | |
6387 | if (insn_block_len != ebb->start_offset - block_begin) | |
6388 | { | |
6389 | (*_bfd_error_handler) | |
6390 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6391 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
6392 | return FALSE; | |
6393 | } | |
6394 | ebb->start_offset -= insn_block_len; | |
6395 | ||
6396 | /* Update the reloc counter. */ | |
6397 | while (ebb->start_reloc_idx > 0 | |
6398 | && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset | |
6399 | >= ebb->start_offset)) | |
6400 | { | |
6401 | ebb->start_reloc_idx--; | |
6402 | } | |
6403 | ||
6404 | if (ebb->start_ptbl_idx == 0) | |
6405 | return TRUE; | |
6406 | ||
6407 | new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1]; | |
6408 | if ((new_entry->flags & XTENSA_PROP_INSN) == 0 | |
99ded152 | 6409 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6410 | || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6411 | return TRUE; | |
6412 | if (new_entry->address + new_entry->size != the_entry->address) | |
6413 | return TRUE; | |
6414 | ||
6415 | the_entry = new_entry; | |
6416 | ebb->start_ptbl_idx--; | |
6417 | } | |
6418 | return TRUE; | |
6419 | } | |
6420 | ||
6421 | ||
6422 | static bfd_size_type | |
7fa3d080 BW |
6423 | insn_block_decodable_len (bfd_byte *contents, |
6424 | bfd_size_type content_len, | |
6425 | bfd_vma block_offset, | |
6426 | bfd_size_type block_len) | |
43cd72b9 BW |
6427 | { |
6428 | bfd_vma offset = block_offset; | |
6429 | ||
6430 | while (offset < block_offset + block_len) | |
6431 | { | |
6432 | bfd_size_type insn_len = 0; | |
6433 | ||
6434 | insn_len = insn_decode_len (contents, content_len, offset); | |
6435 | if (insn_len == 0) | |
6436 | return (offset - block_offset); | |
6437 | offset += insn_len; | |
6438 | } | |
6439 | return (offset - block_offset); | |
6440 | } | |
6441 | ||
6442 | ||
6443 | static void | |
7fa3d080 | 6444 | ebb_propose_action (ebb_constraint *c, |
7fa3d080 | 6445 | enum ebb_target_enum align_type, |
288f74fa | 6446 | bfd_vma alignment_pow, |
7fa3d080 BW |
6447 | text_action_t action, |
6448 | bfd_vma offset, | |
6449 | int removed_bytes, | |
6450 | bfd_boolean do_action) | |
43cd72b9 | 6451 | { |
b08b5071 | 6452 | proposed_action *act; |
43cd72b9 | 6453 | |
43cd72b9 BW |
6454 | if (c->action_allocated <= c->action_count) |
6455 | { | |
b08b5071 | 6456 | unsigned new_allocated, i; |
823fc61f | 6457 | proposed_action *new_actions; |
b08b5071 BW |
6458 | |
6459 | new_allocated = (c->action_count + 2) * 2; | |
823fc61f | 6460 | new_actions = (proposed_action *) |
43cd72b9 BW |
6461 | bfd_zmalloc (sizeof (proposed_action) * new_allocated); |
6462 | ||
6463 | for (i = 0; i < c->action_count; i++) | |
6464 | new_actions[i] = c->actions[i]; | |
7fa3d080 | 6465 | if (c->actions) |
43cd72b9 BW |
6466 | free (c->actions); |
6467 | c->actions = new_actions; | |
6468 | c->action_allocated = new_allocated; | |
6469 | } | |
b08b5071 BW |
6470 | |
6471 | act = &c->actions[c->action_count]; | |
6472 | act->align_type = align_type; | |
6473 | act->alignment_pow = alignment_pow; | |
6474 | act->action = action; | |
6475 | act->offset = offset; | |
6476 | act->removed_bytes = removed_bytes; | |
6477 | act->do_action = do_action; | |
6478 | ||
43cd72b9 BW |
6479 | c->action_count++; |
6480 | } | |
6481 | ||
6482 | \f | |
6483 | /* Access to internal relocations, section contents and symbols. */ | |
6484 | ||
6485 | /* During relaxation, we need to modify relocations, section contents, | |
6486 | and symbol definitions, and we need to keep the original values from | |
6487 | being reloaded from the input files, i.e., we need to "pin" the | |
6488 | modified values in memory. We also want to continue to observe the | |
6489 | setting of the "keep-memory" flag. The following functions wrap the | |
6490 | standard BFD functions to take care of this for us. */ | |
6491 | ||
6492 | static Elf_Internal_Rela * | |
7fa3d080 | 6493 | retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6494 | { |
6495 | Elf_Internal_Rela *internal_relocs; | |
6496 | ||
6497 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6498 | return NULL; | |
6499 | ||
6500 | internal_relocs = elf_section_data (sec)->relocs; | |
6501 | if (internal_relocs == NULL) | |
6502 | internal_relocs = (_bfd_elf_link_read_relocs | |
7fa3d080 | 6503 | (abfd, sec, NULL, NULL, keep_memory)); |
43cd72b9 BW |
6504 | return internal_relocs; |
6505 | } | |
6506 | ||
6507 | ||
6508 | static void | |
7fa3d080 | 6509 | pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6510 | { |
6511 | elf_section_data (sec)->relocs = internal_relocs; | |
6512 | } | |
6513 | ||
6514 | ||
6515 | static void | |
7fa3d080 | 6516 | release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6517 | { |
6518 | if (internal_relocs | |
6519 | && elf_section_data (sec)->relocs != internal_relocs) | |
6520 | free (internal_relocs); | |
6521 | } | |
6522 | ||
6523 | ||
6524 | static bfd_byte * | |
7fa3d080 | 6525 | retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6526 | { |
6527 | bfd_byte *contents; | |
6528 | bfd_size_type sec_size; | |
6529 | ||
6530 | sec_size = bfd_get_section_limit (abfd, sec); | |
6531 | contents = elf_section_data (sec)->this_hdr.contents; | |
6532 | ||
6533 | if (contents == NULL && sec_size != 0) | |
6534 | { | |
6535 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
6536 | { | |
7fa3d080 | 6537 | if (contents) |
43cd72b9 BW |
6538 | free (contents); |
6539 | return NULL; | |
6540 | } | |
6541 | if (keep_memory) | |
6542 | elf_section_data (sec)->this_hdr.contents = contents; | |
6543 | } | |
6544 | return contents; | |
6545 | } | |
6546 | ||
6547 | ||
6548 | static void | |
7fa3d080 | 6549 | pin_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6550 | { |
6551 | elf_section_data (sec)->this_hdr.contents = contents; | |
6552 | } | |
6553 | ||
6554 | ||
6555 | static void | |
7fa3d080 | 6556 | release_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6557 | { |
6558 | if (contents && elf_section_data (sec)->this_hdr.contents != contents) | |
6559 | free (contents); | |
6560 | } | |
6561 | ||
6562 | ||
6563 | static Elf_Internal_Sym * | |
7fa3d080 | 6564 | retrieve_local_syms (bfd *input_bfd) |
43cd72b9 BW |
6565 | { |
6566 | Elf_Internal_Shdr *symtab_hdr; | |
6567 | Elf_Internal_Sym *isymbuf; | |
6568 | size_t locsymcount; | |
6569 | ||
6570 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
6571 | locsymcount = symtab_hdr->sh_info; | |
6572 | ||
6573 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
6574 | if (isymbuf == NULL && locsymcount != 0) | |
6575 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6576 | NULL, NULL, NULL); | |
6577 | ||
6578 | /* Save the symbols for this input file so they won't be read again. */ | |
6579 | if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents) | |
6580 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
6581 | ||
6582 | return isymbuf; | |
6583 | } | |
6584 | ||
6585 | \f | |
6586 | /* Code for link-time relaxation. */ | |
6587 | ||
6588 | /* Initialization for relaxation: */ | |
7fa3d080 | 6589 | static bfd_boolean analyze_relocations (struct bfd_link_info *); |
43cd72b9 | 6590 | static bfd_boolean find_relaxable_sections |
7fa3d080 | 6591 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
43cd72b9 | 6592 | static bfd_boolean collect_source_relocs |
7fa3d080 | 6593 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 | 6594 | static bfd_boolean is_resolvable_asm_expansion |
7fa3d080 BW |
6595 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *, |
6596 | bfd_boolean *); | |
43cd72b9 | 6597 | static Elf_Internal_Rela *find_associated_l32r_irel |
7fa3d080 | 6598 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *); |
43cd72b9 | 6599 | static bfd_boolean compute_text_actions |
7fa3d080 BW |
6600 | (bfd *, asection *, struct bfd_link_info *); |
6601 | static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *); | |
6602 | static bfd_boolean compute_ebb_actions (ebb_constraint *); | |
43cd72b9 | 6603 | static bfd_boolean check_section_ebb_pcrels_fit |
cb337148 BW |
6604 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, const ebb_constraint *, |
6605 | const xtensa_opcode *); | |
7fa3d080 | 6606 | static bfd_boolean check_section_ebb_reduces (const ebb_constraint *); |
43cd72b9 | 6607 | static void text_action_add_proposed |
7fa3d080 BW |
6608 | (text_action_list *, const ebb_constraint *, asection *); |
6609 | static int compute_fill_extra_space (property_table_entry *); | |
43cd72b9 BW |
6610 | |
6611 | /* First pass: */ | |
6612 | static bfd_boolean compute_removed_literals | |
7fa3d080 | 6613 | (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *); |
43cd72b9 | 6614 | static Elf_Internal_Rela *get_irel_at_offset |
7fa3d080 | 6615 | (asection *, Elf_Internal_Rela *, bfd_vma); |
43cd72b9 | 6616 | static bfd_boolean is_removable_literal |
99ded152 BW |
6617 | (const source_reloc *, int, const source_reloc *, int, asection *, |
6618 | property_table_entry *, int); | |
43cd72b9 | 6619 | static bfd_boolean remove_dead_literal |
7fa3d080 BW |
6620 | (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
6621 | Elf_Internal_Rela *, source_reloc *, property_table_entry *, int); | |
6622 | static bfd_boolean identify_literal_placement | |
6623 | (bfd *, asection *, bfd_byte *, struct bfd_link_info *, | |
6624 | value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int, | |
6625 | source_reloc *, property_table_entry *, int, section_cache_t *, | |
6626 | bfd_boolean); | |
6627 | static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *); | |
43cd72b9 | 6628 | static bfd_boolean coalesce_shared_literal |
7fa3d080 | 6629 | (asection *, source_reloc *, property_table_entry *, int, value_map *); |
43cd72b9 | 6630 | static bfd_boolean move_shared_literal |
7fa3d080 BW |
6631 | (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *, |
6632 | int, const r_reloc *, const literal_value *, section_cache_t *); | |
43cd72b9 BW |
6633 | |
6634 | /* Second pass: */ | |
7fa3d080 BW |
6635 | static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *); |
6636 | static bfd_boolean translate_section_fixes (asection *); | |
6637 | static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *); | |
9b7f5d20 | 6638 | static asection *translate_reloc (const r_reloc *, r_reloc *, asection *); |
43cd72b9 | 6639 | static void shrink_dynamic_reloc_sections |
7fa3d080 | 6640 | (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *); |
43cd72b9 | 6641 | static bfd_boolean move_literal |
7fa3d080 BW |
6642 | (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *, |
6643 | xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *); | |
43cd72b9 | 6644 | static bfd_boolean relax_property_section |
7fa3d080 | 6645 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 BW |
6646 | |
6647 | /* Third pass: */ | |
7fa3d080 | 6648 | static bfd_boolean relax_section_symbols (bfd *, asection *); |
43cd72b9 BW |
6649 | |
6650 | ||
6651 | static bfd_boolean | |
7fa3d080 BW |
6652 | elf_xtensa_relax_section (bfd *abfd, |
6653 | asection *sec, | |
6654 | struct bfd_link_info *link_info, | |
6655 | bfd_boolean *again) | |
43cd72b9 BW |
6656 | { |
6657 | static value_map_hash_table *values = NULL; | |
6658 | static bfd_boolean relocations_analyzed = FALSE; | |
6659 | xtensa_relax_info *relax_info; | |
6660 | ||
6661 | if (!relocations_analyzed) | |
6662 | { | |
6663 | /* Do some overall initialization for relaxation. */ | |
6664 | values = value_map_hash_table_init (); | |
6665 | if (values == NULL) | |
6666 | return FALSE; | |
6667 | relaxing_section = TRUE; | |
6668 | if (!analyze_relocations (link_info)) | |
6669 | return FALSE; | |
6670 | relocations_analyzed = TRUE; | |
6671 | } | |
6672 | *again = FALSE; | |
6673 | ||
6674 | /* Don't mess with linker-created sections. */ | |
6675 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6676 | return TRUE; | |
6677 | ||
6678 | relax_info = get_xtensa_relax_info (sec); | |
6679 | BFD_ASSERT (relax_info != NULL); | |
6680 | ||
6681 | switch (relax_info->visited) | |
6682 | { | |
6683 | case 0: | |
6684 | /* Note: It would be nice to fold this pass into | |
6685 | analyze_relocations, but it is important for this step that the | |
6686 | sections be examined in link order. */ | |
6687 | if (!compute_removed_literals (abfd, sec, link_info, values)) | |
6688 | return FALSE; | |
6689 | *again = TRUE; | |
6690 | break; | |
6691 | ||
6692 | case 1: | |
6693 | if (values) | |
6694 | value_map_hash_table_delete (values); | |
6695 | values = NULL; | |
6696 | if (!relax_section (abfd, sec, link_info)) | |
6697 | return FALSE; | |
6698 | *again = TRUE; | |
6699 | break; | |
6700 | ||
6701 | case 2: | |
6702 | if (!relax_section_symbols (abfd, sec)) | |
6703 | return FALSE; | |
6704 | break; | |
6705 | } | |
6706 | ||
6707 | relax_info->visited++; | |
6708 | return TRUE; | |
6709 | } | |
6710 | ||
6711 | \f | |
6712 | /* Initialization for relaxation. */ | |
6713 | ||
6714 | /* This function is called once at the start of relaxation. It scans | |
6715 | all the input sections and marks the ones that are relaxable (i.e., | |
6716 | literal sections with L32R relocations against them), and then | |
6717 | collects source_reloc information for all the relocations against | |
6718 | those relaxable sections. During this process, it also detects | |
6719 | longcalls, i.e., calls relaxed by the assembler into indirect | |
6720 | calls, that can be optimized back into direct calls. Within each | |
6721 | extended basic block (ebb) containing an optimized longcall, it | |
6722 | computes a set of "text actions" that can be performed to remove | |
6723 | the L32R associated with the longcall while optionally preserving | |
6724 | branch target alignments. */ | |
6725 | ||
6726 | static bfd_boolean | |
7fa3d080 | 6727 | analyze_relocations (struct bfd_link_info *link_info) |
43cd72b9 BW |
6728 | { |
6729 | bfd *abfd; | |
6730 | asection *sec; | |
6731 | bfd_boolean is_relaxable = FALSE; | |
6732 | ||
6733 | /* Initialize the per-section relaxation info. */ | |
6734 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6735 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6736 | { | |
6737 | init_xtensa_relax_info (sec); | |
6738 | } | |
6739 | ||
6740 | /* Mark relaxable sections (and count relocations against each one). */ | |
6741 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6742 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6743 | { | |
6744 | if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable)) | |
6745 | return FALSE; | |
6746 | } | |
6747 | ||
6748 | /* Bail out if there are no relaxable sections. */ | |
6749 | if (!is_relaxable) | |
6750 | return TRUE; | |
6751 | ||
6752 | /* Allocate space for source_relocs. */ | |
6753 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6754 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6755 | { | |
6756 | xtensa_relax_info *relax_info; | |
6757 | ||
6758 | relax_info = get_xtensa_relax_info (sec); | |
6759 | if (relax_info->is_relaxable_literal_section | |
6760 | || relax_info->is_relaxable_asm_section) | |
6761 | { | |
6762 | relax_info->src_relocs = (source_reloc *) | |
6763 | bfd_malloc (relax_info->src_count * sizeof (source_reloc)); | |
6764 | } | |
25c6282a BW |
6765 | else |
6766 | relax_info->src_count = 0; | |
43cd72b9 BW |
6767 | } |
6768 | ||
6769 | /* Collect info on relocations against each relaxable section. */ | |
6770 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6771 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6772 | { | |
6773 | if (!collect_source_relocs (abfd, sec, link_info)) | |
6774 | return FALSE; | |
6775 | } | |
6776 | ||
6777 | /* Compute the text actions. */ | |
6778 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6779 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6780 | { | |
6781 | if (!compute_text_actions (abfd, sec, link_info)) | |
6782 | return FALSE; | |
6783 | } | |
6784 | ||
6785 | return TRUE; | |
6786 | } | |
6787 | ||
6788 | ||
6789 | /* Find all the sections that might be relaxed. The motivation for | |
6790 | this pass is that collect_source_relocs() needs to record _all_ the | |
6791 | relocations that target each relaxable section. That is expensive | |
6792 | and unnecessary unless the target section is actually going to be | |
6793 | relaxed. This pass identifies all such sections by checking if | |
6794 | they have L32Rs pointing to them. In the process, the total number | |
6795 | of relocations targeting each section is also counted so that we | |
6796 | know how much space to allocate for source_relocs against each | |
6797 | relaxable literal section. */ | |
6798 | ||
6799 | static bfd_boolean | |
7fa3d080 BW |
6800 | find_relaxable_sections (bfd *abfd, |
6801 | asection *sec, | |
6802 | struct bfd_link_info *link_info, | |
6803 | bfd_boolean *is_relaxable_p) | |
43cd72b9 BW |
6804 | { |
6805 | Elf_Internal_Rela *internal_relocs; | |
6806 | bfd_byte *contents; | |
6807 | bfd_boolean ok = TRUE; | |
6808 | unsigned i; | |
6809 | xtensa_relax_info *source_relax_info; | |
25c6282a | 6810 | bfd_boolean is_l32r_reloc; |
43cd72b9 BW |
6811 | |
6812 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6813 | link_info->keep_memory); | |
6814 | if (internal_relocs == NULL) | |
6815 | return ok; | |
6816 | ||
6817 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6818 | if (contents == NULL && sec->size != 0) | |
6819 | { | |
6820 | ok = FALSE; | |
6821 | goto error_return; | |
6822 | } | |
6823 | ||
6824 | source_relax_info = get_xtensa_relax_info (sec); | |
6825 | for (i = 0; i < sec->reloc_count; i++) | |
6826 | { | |
6827 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6828 | r_reloc r_rel; | |
6829 | asection *target_sec; | |
6830 | xtensa_relax_info *target_relax_info; | |
6831 | ||
6832 | /* If this section has not already been marked as "relaxable", and | |
6833 | if it contains any ASM_EXPAND relocations (marking expanded | |
6834 | longcalls) that can be optimized into direct calls, then mark | |
6835 | the section as "relaxable". */ | |
6836 | if (source_relax_info | |
6837 | && !source_relax_info->is_relaxable_asm_section | |
6838 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND) | |
6839 | { | |
6840 | bfd_boolean is_reachable = FALSE; | |
6841 | if (is_resolvable_asm_expansion (abfd, sec, contents, irel, | |
6842 | link_info, &is_reachable) | |
6843 | && is_reachable) | |
6844 | { | |
6845 | source_relax_info->is_relaxable_asm_section = TRUE; | |
6846 | *is_relaxable_p = TRUE; | |
6847 | } | |
6848 | } | |
6849 | ||
6850 | r_reloc_init (&r_rel, abfd, irel, contents, | |
6851 | bfd_get_section_limit (abfd, sec)); | |
6852 | ||
6853 | target_sec = r_reloc_get_section (&r_rel); | |
6854 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6855 | if (!target_relax_info) | |
6856 | continue; | |
6857 | ||
6858 | /* Count PC-relative operand relocations against the target section. | |
6859 | Note: The conditions tested here must match the conditions under | |
6860 | which init_source_reloc is called in collect_source_relocs(). */ | |
25c6282a BW |
6861 | is_l32r_reloc = FALSE; |
6862 | if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6863 | { | |
6864 | xtensa_opcode opcode = | |
6865 | get_relocation_opcode (abfd, sec, contents, irel); | |
6866 | if (opcode != XTENSA_UNDEFINED) | |
6867 | { | |
6868 | is_l32r_reloc = (opcode == get_l32r_opcode ()); | |
6869 | if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info)) | |
6870 | || is_l32r_reloc) | |
6871 | target_relax_info->src_count++; | |
6872 | } | |
6873 | } | |
43cd72b9 | 6874 | |
25c6282a | 6875 | if (is_l32r_reloc && r_reloc_is_defined (&r_rel)) |
43cd72b9 BW |
6876 | { |
6877 | /* Mark the target section as relaxable. */ | |
6878 | target_relax_info->is_relaxable_literal_section = TRUE; | |
6879 | *is_relaxable_p = TRUE; | |
6880 | } | |
6881 | } | |
6882 | ||
6883 | error_return: | |
6884 | release_contents (sec, contents); | |
6885 | release_internal_relocs (sec, internal_relocs); | |
6886 | return ok; | |
6887 | } | |
6888 | ||
6889 | ||
6890 | /* Record _all_ the relocations that point to relaxable sections, and | |
6891 | get rid of ASM_EXPAND relocs by either converting them to | |
6892 | ASM_SIMPLIFY or by removing them. */ | |
6893 | ||
6894 | static bfd_boolean | |
7fa3d080 BW |
6895 | collect_source_relocs (bfd *abfd, |
6896 | asection *sec, | |
6897 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6898 | { |
6899 | Elf_Internal_Rela *internal_relocs; | |
6900 | bfd_byte *contents; | |
6901 | bfd_boolean ok = TRUE; | |
6902 | unsigned i; | |
6903 | bfd_size_type sec_size; | |
6904 | ||
6905 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6906 | link_info->keep_memory); | |
6907 | if (internal_relocs == NULL) | |
6908 | return ok; | |
6909 | ||
6910 | sec_size = bfd_get_section_limit (abfd, sec); | |
6911 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6912 | if (contents == NULL && sec_size != 0) | |
6913 | { | |
6914 | ok = FALSE; | |
6915 | goto error_return; | |
6916 | } | |
6917 | ||
6918 | /* Record relocations against relaxable literal sections. */ | |
6919 | for (i = 0; i < sec->reloc_count; i++) | |
6920 | { | |
6921 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6922 | r_reloc r_rel; | |
6923 | asection *target_sec; | |
6924 | xtensa_relax_info *target_relax_info; | |
6925 | ||
6926 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6927 | ||
6928 | target_sec = r_reloc_get_section (&r_rel); | |
6929 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6930 | ||
6931 | if (target_relax_info | |
6932 | && (target_relax_info->is_relaxable_literal_section | |
6933 | || target_relax_info->is_relaxable_asm_section)) | |
6934 | { | |
6935 | xtensa_opcode opcode = XTENSA_UNDEFINED; | |
6936 | int opnd = -1; | |
6937 | bfd_boolean is_abs_literal = FALSE; | |
6938 | ||
6939 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
6940 | { | |
6941 | /* None of the current alternate relocs are PC-relative, | |
6942 | and only PC-relative relocs matter here. However, we | |
6943 | still need to record the opcode for literal | |
6944 | coalescing. */ | |
6945 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6946 | if (opcode == get_l32r_opcode ()) | |
6947 | { | |
6948 | is_abs_literal = TRUE; | |
6949 | opnd = 1; | |
6950 | } | |
6951 | else | |
6952 | opcode = XTENSA_UNDEFINED; | |
6953 | } | |
6954 | else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6955 | { | |
6956 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6957 | opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
6958 | } | |
6959 | ||
6960 | if (opcode != XTENSA_UNDEFINED) | |
6961 | { | |
6962 | int src_next = target_relax_info->src_next++; | |
6963 | source_reloc *s_reloc = &target_relax_info->src_relocs[src_next]; | |
6964 | ||
6965 | init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd, | |
6966 | is_abs_literal); | |
6967 | } | |
6968 | } | |
6969 | } | |
6970 | ||
6971 | /* Now get rid of ASM_EXPAND relocations. At this point, the | |
6972 | src_relocs array for the target literal section may still be | |
6973 | incomplete, but it must at least contain the entries for the L32R | |
6974 | relocations associated with ASM_EXPANDs because they were just | |
6975 | added in the preceding loop over the relocations. */ | |
6976 | ||
6977 | for (i = 0; i < sec->reloc_count; i++) | |
6978 | { | |
6979 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6980 | bfd_boolean is_reachable; | |
6981 | ||
6982 | if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info, | |
6983 | &is_reachable)) | |
6984 | continue; | |
6985 | ||
6986 | if (is_reachable) | |
6987 | { | |
6988 | Elf_Internal_Rela *l32r_irel; | |
6989 | r_reloc r_rel; | |
6990 | asection *target_sec; | |
6991 | xtensa_relax_info *target_relax_info; | |
6992 | ||
6993 | /* Mark the source_reloc for the L32R so that it will be | |
6994 | removed in compute_removed_literals(), along with the | |
6995 | associated literal. */ | |
6996 | l32r_irel = find_associated_l32r_irel (abfd, sec, contents, | |
6997 | irel, internal_relocs); | |
6998 | if (l32r_irel == NULL) | |
6999 | continue; | |
7000 | ||
7001 | r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size); | |
7002 | ||
7003 | target_sec = r_reloc_get_section (&r_rel); | |
7004 | target_relax_info = get_xtensa_relax_info (target_sec); | |
7005 | ||
7006 | if (target_relax_info | |
7007 | && (target_relax_info->is_relaxable_literal_section | |
7008 | || target_relax_info->is_relaxable_asm_section)) | |
7009 | { | |
7010 | source_reloc *s_reloc; | |
7011 | ||
7012 | /* Search the source_relocs for the entry corresponding to | |
7013 | the l32r_irel. Note: The src_relocs array is not yet | |
7014 | sorted, but it wouldn't matter anyway because we're | |
7015 | searching by source offset instead of target offset. */ | |
7016 | s_reloc = find_source_reloc (target_relax_info->src_relocs, | |
7017 | target_relax_info->src_next, | |
7018 | sec, l32r_irel); | |
7019 | BFD_ASSERT (s_reloc); | |
7020 | s_reloc->is_null = TRUE; | |
7021 | } | |
7022 | ||
7023 | /* Convert this reloc to ASM_SIMPLIFY. */ | |
7024 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
7025 | R_XTENSA_ASM_SIMPLIFY); | |
7026 | l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7027 | ||
7028 | pin_internal_relocs (sec, internal_relocs); | |
7029 | } | |
7030 | else | |
7031 | { | |
7032 | /* It is resolvable but doesn't reach. We resolve now | |
7033 | by eliminating the relocation -- the call will remain | |
7034 | expanded into L32R/CALLX. */ | |
7035 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7036 | pin_internal_relocs (sec, internal_relocs); | |
7037 | } | |
7038 | } | |
7039 | ||
7040 | error_return: | |
7041 | release_contents (sec, contents); | |
7042 | release_internal_relocs (sec, internal_relocs); | |
7043 | return ok; | |
7044 | } | |
7045 | ||
7046 | ||
7047 | /* Return TRUE if the asm expansion can be resolved. Generally it can | |
7048 | be resolved on a final link or when a partial link locates it in the | |
7049 | same section as the target. Set "is_reachable" flag if the target of | |
7050 | the call is within the range of a direct call, given the current VMA | |
7051 | for this section and the target section. */ | |
7052 | ||
7053 | bfd_boolean | |
7fa3d080 BW |
7054 | is_resolvable_asm_expansion (bfd *abfd, |
7055 | asection *sec, | |
7056 | bfd_byte *contents, | |
7057 | Elf_Internal_Rela *irel, | |
7058 | struct bfd_link_info *link_info, | |
7059 | bfd_boolean *is_reachable_p) | |
43cd72b9 BW |
7060 | { |
7061 | asection *target_sec; | |
7062 | bfd_vma target_offset; | |
7063 | r_reloc r_rel; | |
7064 | xtensa_opcode opcode, direct_call_opcode; | |
7065 | bfd_vma self_address; | |
7066 | bfd_vma dest_address; | |
7067 | bfd_boolean uses_l32r; | |
7068 | bfd_size_type sec_size; | |
7069 | ||
7070 | *is_reachable_p = FALSE; | |
7071 | ||
7072 | if (contents == NULL) | |
7073 | return FALSE; | |
7074 | ||
7075 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND) | |
7076 | return FALSE; | |
7077 | ||
7078 | sec_size = bfd_get_section_limit (abfd, sec); | |
7079 | opcode = get_expanded_call_opcode (contents + irel->r_offset, | |
7080 | sec_size - irel->r_offset, &uses_l32r); | |
7081 | /* Optimization of longcalls that use CONST16 is not yet implemented. */ | |
7082 | if (!uses_l32r) | |
7083 | return FALSE; | |
7084 | ||
7085 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
7086 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
7087 | return FALSE; | |
7088 | ||
7089 | /* Check and see that the target resolves. */ | |
7090 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7091 | if (!r_reloc_is_defined (&r_rel)) | |
7092 | return FALSE; | |
7093 | ||
7094 | target_sec = r_reloc_get_section (&r_rel); | |
7095 | target_offset = r_rel.target_offset; | |
7096 | ||
7097 | /* If the target is in a shared library, then it doesn't reach. This | |
7098 | isn't supposed to come up because the compiler should never generate | |
7099 | non-PIC calls on systems that use shared libraries, but the linker | |
7100 | shouldn't crash regardless. */ | |
7101 | if (!target_sec->output_section) | |
7102 | return FALSE; | |
7103 | ||
7104 | /* For relocatable sections, we can only simplify when the output | |
7105 | section of the target is the same as the output section of the | |
7106 | source. */ | |
7107 | if (link_info->relocatable | |
7108 | && (target_sec->output_section != sec->output_section | |
7109 | || is_reloc_sym_weak (abfd, irel))) | |
7110 | return FALSE; | |
7111 | ||
7112 | self_address = (sec->output_section->vma | |
7113 | + sec->output_offset + irel->r_offset + 3); | |
7114 | dest_address = (target_sec->output_section->vma | |
7115 | + target_sec->output_offset + target_offset); | |
7116 | ||
7117 | *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0, | |
7118 | self_address, dest_address); | |
7119 | ||
7120 | if ((self_address >> CALL_SEGMENT_BITS) != | |
7121 | (dest_address >> CALL_SEGMENT_BITS)) | |
7122 | return FALSE; | |
7123 | ||
7124 | return TRUE; | |
7125 | } | |
7126 | ||
7127 | ||
7128 | static Elf_Internal_Rela * | |
7fa3d080 BW |
7129 | find_associated_l32r_irel (bfd *abfd, |
7130 | asection *sec, | |
7131 | bfd_byte *contents, | |
7132 | Elf_Internal_Rela *other_irel, | |
7133 | Elf_Internal_Rela *internal_relocs) | |
43cd72b9 BW |
7134 | { |
7135 | unsigned i; | |
e0001a05 | 7136 | |
43cd72b9 BW |
7137 | for (i = 0; i < sec->reloc_count; i++) |
7138 | { | |
7139 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
e0001a05 | 7140 | |
43cd72b9 BW |
7141 | if (irel == other_irel) |
7142 | continue; | |
7143 | if (irel->r_offset != other_irel->r_offset) | |
7144 | continue; | |
7145 | if (is_l32r_relocation (abfd, sec, contents, irel)) | |
7146 | return irel; | |
7147 | } | |
7148 | ||
7149 | return NULL; | |
e0001a05 NC |
7150 | } |
7151 | ||
7152 | ||
cb337148 BW |
7153 | static xtensa_opcode * |
7154 | build_reloc_opcodes (bfd *abfd, | |
7155 | asection *sec, | |
7156 | bfd_byte *contents, | |
7157 | Elf_Internal_Rela *internal_relocs) | |
7158 | { | |
7159 | unsigned i; | |
7160 | xtensa_opcode *reloc_opcodes = | |
7161 | (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count); | |
7162 | for (i = 0; i < sec->reloc_count; i++) | |
7163 | { | |
7164 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7165 | reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel); | |
7166 | } | |
7167 | return reloc_opcodes; | |
7168 | } | |
7169 | ||
7170 | ||
43cd72b9 BW |
7171 | /* The compute_text_actions function will build a list of potential |
7172 | transformation actions for code in the extended basic block of each | |
7173 | longcall that is optimized to a direct call. From this list we | |
7174 | generate a set of actions to actually perform that optimizes for | |
7175 | space and, if not using size_opt, maintains branch target | |
7176 | alignments. | |
e0001a05 | 7177 | |
43cd72b9 BW |
7178 | These actions to be performed are placed on a per-section list. |
7179 | The actual changes are performed by relax_section() in the second | |
7180 | pass. */ | |
7181 | ||
7182 | bfd_boolean | |
7fa3d080 BW |
7183 | compute_text_actions (bfd *abfd, |
7184 | asection *sec, | |
7185 | struct bfd_link_info *link_info) | |
e0001a05 | 7186 | { |
cb337148 | 7187 | xtensa_opcode *reloc_opcodes = NULL; |
43cd72b9 | 7188 | xtensa_relax_info *relax_info; |
e0001a05 | 7189 | bfd_byte *contents; |
43cd72b9 | 7190 | Elf_Internal_Rela *internal_relocs; |
e0001a05 NC |
7191 | bfd_boolean ok = TRUE; |
7192 | unsigned i; | |
43cd72b9 BW |
7193 | property_table_entry *prop_table = 0; |
7194 | int ptblsize = 0; | |
7195 | bfd_size_type sec_size; | |
43cd72b9 | 7196 | |
43cd72b9 BW |
7197 | relax_info = get_xtensa_relax_info (sec); |
7198 | BFD_ASSERT (relax_info); | |
25c6282a BW |
7199 | BFD_ASSERT (relax_info->src_next == relax_info->src_count); |
7200 | ||
7201 | /* Do nothing if the section contains no optimized longcalls. */ | |
43cd72b9 BW |
7202 | if (!relax_info->is_relaxable_asm_section) |
7203 | return ok; | |
e0001a05 NC |
7204 | |
7205 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
7206 | link_info->keep_memory); | |
e0001a05 | 7207 | |
43cd72b9 BW |
7208 | if (internal_relocs) |
7209 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
7210 | internal_reloc_compare); | |
7211 | ||
7212 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 | 7213 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 7214 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
7215 | { |
7216 | ok = FALSE; | |
7217 | goto error_return; | |
7218 | } | |
7219 | ||
43cd72b9 BW |
7220 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
7221 | XTENSA_PROP_SEC_NAME, FALSE); | |
7222 | if (ptblsize < 0) | |
7223 | { | |
7224 | ok = FALSE; | |
7225 | goto error_return; | |
7226 | } | |
7227 | ||
7228 | for (i = 0; i < sec->reloc_count; i++) | |
e0001a05 NC |
7229 | { |
7230 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 BW |
7231 | bfd_vma r_offset; |
7232 | property_table_entry *the_entry; | |
7233 | int ptbl_idx; | |
7234 | ebb_t *ebb; | |
7235 | ebb_constraint ebb_table; | |
7236 | bfd_size_type simplify_size; | |
7237 | ||
7238 | if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY) | |
7239 | continue; | |
7240 | r_offset = irel->r_offset; | |
e0001a05 | 7241 | |
43cd72b9 BW |
7242 | simplify_size = get_asm_simplify_size (contents, sec_size, r_offset); |
7243 | if (simplify_size == 0) | |
7244 | { | |
7245 | (*_bfd_error_handler) | |
7246 | (_("%B(%A+0x%lx): could not decode instruction for XTENSA_ASM_SIMPLIFY relocation; possible configuration mismatch"), | |
7247 | sec->owner, sec, r_offset); | |
7248 | continue; | |
7249 | } | |
e0001a05 | 7250 | |
43cd72b9 BW |
7251 | /* If the instruction table is not around, then don't do this |
7252 | relaxation. */ | |
7253 | the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7254 | sec->vma + irel->r_offset); | |
7255 | if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL) | |
7256 | { | |
7257 | text_action_add (&relax_info->action_list, | |
7258 | ta_convert_longcall, sec, r_offset, | |
7259 | 0); | |
7260 | continue; | |
7261 | } | |
7262 | ||
7263 | /* If the next longcall happens to be at the same address as an | |
7264 | unreachable section of size 0, then skip forward. */ | |
7265 | ptbl_idx = the_entry - prop_table; | |
7266 | while ((the_entry->flags & XTENSA_PROP_UNREACHABLE) | |
7267 | && the_entry->size == 0 | |
7268 | && ptbl_idx + 1 < ptblsize | |
7269 | && (prop_table[ptbl_idx + 1].address | |
7270 | == prop_table[ptbl_idx].address)) | |
7271 | { | |
7272 | ptbl_idx++; | |
7273 | the_entry++; | |
7274 | } | |
e0001a05 | 7275 | |
99ded152 | 7276 | if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM) |
43cd72b9 BW |
7277 | /* NO_REORDER is OK */ |
7278 | continue; | |
e0001a05 | 7279 | |
43cd72b9 BW |
7280 | init_ebb_constraint (&ebb_table); |
7281 | ebb = &ebb_table.ebb; | |
7282 | init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize, | |
7283 | internal_relocs, sec->reloc_count); | |
7284 | ebb->start_offset = r_offset + simplify_size; | |
7285 | ebb->end_offset = r_offset + simplify_size; | |
7286 | ebb->start_ptbl_idx = ptbl_idx; | |
7287 | ebb->end_ptbl_idx = ptbl_idx; | |
7288 | ebb->start_reloc_idx = i; | |
7289 | ebb->end_reloc_idx = i; | |
7290 | ||
cb337148 BW |
7291 | /* Precompute the opcode for each relocation. */ |
7292 | if (reloc_opcodes == NULL) | |
7293 | reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, | |
7294 | internal_relocs); | |
7295 | ||
43cd72b9 BW |
7296 | if (!extend_ebb_bounds (ebb) |
7297 | || !compute_ebb_proposed_actions (&ebb_table) | |
7298 | || !compute_ebb_actions (&ebb_table) | |
7299 | || !check_section_ebb_pcrels_fit (abfd, sec, contents, | |
cb337148 BW |
7300 | internal_relocs, &ebb_table, |
7301 | reloc_opcodes) | |
43cd72b9 | 7302 | || !check_section_ebb_reduces (&ebb_table)) |
e0001a05 | 7303 | { |
43cd72b9 BW |
7304 | /* If anything goes wrong or we get unlucky and something does |
7305 | not fit, with our plan because of expansion between | |
7306 | critical branches, just convert to a NOP. */ | |
7307 | ||
7308 | text_action_add (&relax_info->action_list, | |
7309 | ta_convert_longcall, sec, r_offset, 0); | |
7310 | i = ebb_table.ebb.end_reloc_idx; | |
7311 | free_ebb_constraint (&ebb_table); | |
7312 | continue; | |
e0001a05 | 7313 | } |
43cd72b9 BW |
7314 | |
7315 | text_action_add_proposed (&relax_info->action_list, &ebb_table, sec); | |
7316 | ||
7317 | /* Update the index so we do not go looking at the relocations | |
7318 | we have already processed. */ | |
7319 | i = ebb_table.ebb.end_reloc_idx; | |
7320 | free_ebb_constraint (&ebb_table); | |
e0001a05 NC |
7321 | } |
7322 | ||
43cd72b9 | 7323 | #if DEBUG |
7fa3d080 | 7324 | if (relax_info->action_list.head) |
43cd72b9 BW |
7325 | print_action_list (stderr, &relax_info->action_list); |
7326 | #endif | |
7327 | ||
7328 | error_return: | |
e0001a05 NC |
7329 | release_contents (sec, contents); |
7330 | release_internal_relocs (sec, internal_relocs); | |
43cd72b9 BW |
7331 | if (prop_table) |
7332 | free (prop_table); | |
cb337148 BW |
7333 | if (reloc_opcodes) |
7334 | free (reloc_opcodes); | |
43cd72b9 | 7335 | |
e0001a05 NC |
7336 | return ok; |
7337 | } | |
7338 | ||
7339 | ||
64b607e6 BW |
7340 | /* Do not widen an instruction if it is preceeded by a |
7341 | loop opcode. It might cause misalignment. */ | |
7342 | ||
7343 | static bfd_boolean | |
7344 | prev_instr_is_a_loop (bfd_byte *contents, | |
7345 | bfd_size_type content_length, | |
7346 | bfd_size_type offset) | |
7347 | { | |
7348 | xtensa_opcode prev_opcode; | |
7349 | ||
7350 | if (offset < 3) | |
7351 | return FALSE; | |
7352 | prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0); | |
7353 | return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1); | |
7354 | } | |
7355 | ||
7356 | ||
43cd72b9 | 7357 | /* Find all of the possible actions for an extended basic block. */ |
e0001a05 | 7358 | |
43cd72b9 | 7359 | bfd_boolean |
7fa3d080 | 7360 | compute_ebb_proposed_actions (ebb_constraint *ebb_table) |
e0001a05 | 7361 | { |
43cd72b9 BW |
7362 | const ebb_t *ebb = &ebb_table->ebb; |
7363 | unsigned rel_idx = ebb->start_reloc_idx; | |
7364 | property_table_entry *entry, *start_entry, *end_entry; | |
64b607e6 BW |
7365 | bfd_vma offset = 0; |
7366 | xtensa_isa isa = xtensa_default_isa; | |
7367 | xtensa_format fmt; | |
7368 | static xtensa_insnbuf insnbuf = NULL; | |
7369 | static xtensa_insnbuf slotbuf = NULL; | |
7370 | ||
7371 | if (insnbuf == NULL) | |
7372 | { | |
7373 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7374 | slotbuf = xtensa_insnbuf_alloc (isa); | |
7375 | } | |
e0001a05 | 7376 | |
43cd72b9 BW |
7377 | start_entry = &ebb->ptbl[ebb->start_ptbl_idx]; |
7378 | end_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
e0001a05 | 7379 | |
43cd72b9 | 7380 | for (entry = start_entry; entry <= end_entry; entry++) |
e0001a05 | 7381 | { |
64b607e6 | 7382 | bfd_vma start_offset, end_offset; |
43cd72b9 | 7383 | bfd_size_type insn_len; |
e0001a05 | 7384 | |
43cd72b9 BW |
7385 | start_offset = entry->address - ebb->sec->vma; |
7386 | end_offset = entry->address + entry->size - ebb->sec->vma; | |
e0001a05 | 7387 | |
43cd72b9 BW |
7388 | if (entry == start_entry) |
7389 | start_offset = ebb->start_offset; | |
7390 | if (entry == end_entry) | |
7391 | end_offset = ebb->end_offset; | |
7392 | offset = start_offset; | |
e0001a05 | 7393 | |
43cd72b9 BW |
7394 | if (offset == entry->address - ebb->sec->vma |
7395 | && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0) | |
7396 | { | |
7397 | enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN; | |
7398 | BFD_ASSERT (offset != end_offset); | |
7399 | if (offset == end_offset) | |
7400 | return FALSE; | |
e0001a05 | 7401 | |
43cd72b9 BW |
7402 | insn_len = insn_decode_len (ebb->contents, ebb->content_length, |
7403 | offset); | |
43cd72b9 | 7404 | if (insn_len == 0) |
64b607e6 BW |
7405 | goto decode_error; |
7406 | ||
43cd72b9 BW |
7407 | if (check_branch_target_aligned_address (offset, insn_len)) |
7408 | align_type = EBB_REQUIRE_TGT_ALIGN; | |
7409 | ||
7410 | ebb_propose_action (ebb_table, align_type, 0, | |
7411 | ta_none, offset, 0, TRUE); | |
7412 | } | |
7413 | ||
7414 | while (offset != end_offset) | |
e0001a05 | 7415 | { |
43cd72b9 | 7416 | Elf_Internal_Rela *irel; |
e0001a05 | 7417 | xtensa_opcode opcode; |
e0001a05 | 7418 | |
43cd72b9 BW |
7419 | while (rel_idx < ebb->end_reloc_idx |
7420 | && (ebb->relocs[rel_idx].r_offset < offset | |
7421 | || (ebb->relocs[rel_idx].r_offset == offset | |
7422 | && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info) | |
7423 | != R_XTENSA_ASM_SIMPLIFY)))) | |
7424 | rel_idx++; | |
7425 | ||
7426 | /* Check for longcall. */ | |
7427 | irel = &ebb->relocs[rel_idx]; | |
7428 | if (irel->r_offset == offset | |
7429 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY) | |
7430 | { | |
7431 | bfd_size_type simplify_size; | |
e0001a05 | 7432 | |
43cd72b9 BW |
7433 | simplify_size = get_asm_simplify_size (ebb->contents, |
7434 | ebb->content_length, | |
7435 | irel->r_offset); | |
7436 | if (simplify_size == 0) | |
64b607e6 | 7437 | goto decode_error; |
43cd72b9 BW |
7438 | |
7439 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7440 | ta_convert_longcall, offset, 0, TRUE); | |
7441 | ||
7442 | offset += simplify_size; | |
7443 | continue; | |
7444 | } | |
e0001a05 | 7445 | |
64b607e6 BW |
7446 | if (offset + MIN_INSN_LENGTH > ebb->content_length) |
7447 | goto decode_error; | |
7448 | xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset], | |
7449 | ebb->content_length - offset); | |
7450 | fmt = xtensa_format_decode (isa, insnbuf); | |
7451 | if (fmt == XTENSA_UNDEFINED) | |
7452 | goto decode_error; | |
7453 | insn_len = xtensa_format_length (isa, fmt); | |
7454 | if (insn_len == (bfd_size_type) XTENSA_UNDEFINED) | |
7455 | goto decode_error; | |
7456 | ||
7457 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
43cd72b9 | 7458 | { |
64b607e6 BW |
7459 | offset += insn_len; |
7460 | continue; | |
43cd72b9 | 7461 | } |
64b607e6 BW |
7462 | |
7463 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
7464 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
7465 | if (opcode == XTENSA_UNDEFINED) | |
7466 | goto decode_error; | |
7467 | ||
43cd72b9 | 7468 | if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0 |
99ded152 | 7469 | && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 | 7470 | && can_narrow_instruction (slotbuf, fmt, opcode) != 0) |
43cd72b9 BW |
7471 | { |
7472 | /* Add an instruction narrow action. */ | |
7473 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7474 | ta_narrow_insn, offset, 0, FALSE); | |
43cd72b9 | 7475 | } |
99ded152 | 7476 | else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 BW |
7477 | && can_widen_instruction (slotbuf, fmt, opcode) != 0 |
7478 | && ! prev_instr_is_a_loop (ebb->contents, | |
7479 | ebb->content_length, offset)) | |
43cd72b9 BW |
7480 | { |
7481 | /* Add an instruction widen action. */ | |
7482 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7483 | ta_widen_insn, offset, 0, FALSE); | |
43cd72b9 | 7484 | } |
64b607e6 | 7485 | else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1) |
43cd72b9 BW |
7486 | { |
7487 | /* Check for branch targets. */ | |
7488 | ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0, | |
7489 | ta_none, offset, 0, TRUE); | |
43cd72b9 BW |
7490 | } |
7491 | ||
7492 | offset += insn_len; | |
e0001a05 NC |
7493 | } |
7494 | } | |
7495 | ||
43cd72b9 BW |
7496 | if (ebb->ends_unreachable) |
7497 | { | |
7498 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7499 | ta_fill, ebb->end_offset, 0, TRUE); | |
7500 | } | |
e0001a05 | 7501 | |
43cd72b9 | 7502 | return TRUE; |
64b607e6 BW |
7503 | |
7504 | decode_error: | |
7505 | (*_bfd_error_handler) | |
7506 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
7507 | ebb->sec->owner, ebb->sec, offset); | |
7508 | return FALSE; | |
43cd72b9 BW |
7509 | } |
7510 | ||
7511 | ||
7512 | /* After all of the information has collected about the | |
7513 | transformations possible in an EBB, compute the appropriate actions | |
7514 | here in compute_ebb_actions. We still must check later to make | |
7515 | sure that the actions do not break any relocations. The algorithm | |
7516 | used here is pretty greedy. Basically, it removes as many no-ops | |
7517 | as possible so that the end of the EBB has the same alignment | |
7518 | characteristics as the original. First, it uses narrowing, then | |
7519 | fill space at the end of the EBB, and finally widenings. If that | |
7520 | does not work, it tries again with one fewer no-op removed. The | |
7521 | optimization will only be performed if all of the branch targets | |
7522 | that were aligned before transformation are also aligned after the | |
7523 | transformation. | |
7524 | ||
7525 | When the size_opt flag is set, ignore the branch target alignments, | |
7526 | narrow all wide instructions, and remove all no-ops unless the end | |
7527 | of the EBB prevents it. */ | |
7528 | ||
7529 | bfd_boolean | |
7fa3d080 | 7530 | compute_ebb_actions (ebb_constraint *ebb_table) |
43cd72b9 BW |
7531 | { |
7532 | unsigned i = 0; | |
7533 | unsigned j; | |
7534 | int removed_bytes = 0; | |
7535 | ebb_t *ebb = &ebb_table->ebb; | |
7536 | unsigned seg_idx_start = 0; | |
7537 | unsigned seg_idx_end = 0; | |
7538 | ||
7539 | /* We perform this like the assembler relaxation algorithm: Start by | |
7540 | assuming all instructions are narrow and all no-ops removed; then | |
7541 | walk through.... */ | |
7542 | ||
7543 | /* For each segment of this that has a solid constraint, check to | |
7544 | see if there are any combinations that will keep the constraint. | |
7545 | If so, use it. */ | |
7546 | for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++) | |
e0001a05 | 7547 | { |
43cd72b9 BW |
7548 | bfd_boolean requires_text_end_align = FALSE; |
7549 | unsigned longcall_count = 0; | |
7550 | unsigned longcall_convert_count = 0; | |
7551 | unsigned narrowable_count = 0; | |
7552 | unsigned narrowable_convert_count = 0; | |
7553 | unsigned widenable_count = 0; | |
7554 | unsigned widenable_convert_count = 0; | |
e0001a05 | 7555 | |
43cd72b9 BW |
7556 | proposed_action *action = NULL; |
7557 | int align = (1 << ebb_table->ebb.sec->alignment_power); | |
e0001a05 | 7558 | |
43cd72b9 | 7559 | seg_idx_start = seg_idx_end; |
e0001a05 | 7560 | |
43cd72b9 BW |
7561 | for (i = seg_idx_start; i < ebb_table->action_count; i++) |
7562 | { | |
7563 | action = &ebb_table->actions[i]; | |
7564 | if (action->action == ta_convert_longcall) | |
7565 | longcall_count++; | |
7566 | if (action->action == ta_narrow_insn) | |
7567 | narrowable_count++; | |
7568 | if (action->action == ta_widen_insn) | |
7569 | widenable_count++; | |
7570 | if (action->action == ta_fill) | |
7571 | break; | |
7572 | if (action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
7573 | break; | |
7574 | if (action->align_type == EBB_REQUIRE_TGT_ALIGN | |
7575 | && !elf32xtensa_size_opt) | |
7576 | break; | |
7577 | } | |
7578 | seg_idx_end = i; | |
e0001a05 | 7579 | |
43cd72b9 BW |
7580 | if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable) |
7581 | requires_text_end_align = TRUE; | |
e0001a05 | 7582 | |
43cd72b9 BW |
7583 | if (elf32xtensa_size_opt && !requires_text_end_align |
7584 | && action->align_type != EBB_REQUIRE_LOOP_ALIGN | |
7585 | && action->align_type != EBB_REQUIRE_TGT_ALIGN) | |
7586 | { | |
7587 | longcall_convert_count = longcall_count; | |
7588 | narrowable_convert_count = narrowable_count; | |
7589 | widenable_convert_count = 0; | |
7590 | } | |
7591 | else | |
7592 | { | |
7593 | /* There is a constraint. Convert the max number of longcalls. */ | |
7594 | narrowable_convert_count = 0; | |
7595 | longcall_convert_count = 0; | |
7596 | widenable_convert_count = 0; | |
e0001a05 | 7597 | |
43cd72b9 | 7598 | for (j = 0; j < longcall_count; j++) |
e0001a05 | 7599 | { |
43cd72b9 BW |
7600 | int removed = (longcall_count - j) * 3 & (align - 1); |
7601 | unsigned desire_narrow = (align - removed) & (align - 1); | |
7602 | unsigned desire_widen = removed; | |
7603 | if (desire_narrow <= narrowable_count) | |
7604 | { | |
7605 | narrowable_convert_count = desire_narrow; | |
7606 | narrowable_convert_count += | |
7607 | (align * ((narrowable_count - narrowable_convert_count) | |
7608 | / align)); | |
7609 | longcall_convert_count = (longcall_count - j); | |
7610 | widenable_convert_count = 0; | |
7611 | break; | |
7612 | } | |
7613 | if (desire_widen <= widenable_count && !elf32xtensa_size_opt) | |
7614 | { | |
7615 | narrowable_convert_count = 0; | |
7616 | longcall_convert_count = longcall_count - j; | |
7617 | widenable_convert_count = desire_widen; | |
7618 | break; | |
7619 | } | |
7620 | } | |
7621 | } | |
e0001a05 | 7622 | |
43cd72b9 BW |
7623 | /* Now the number of conversions are saved. Do them. */ |
7624 | for (i = seg_idx_start; i < seg_idx_end; i++) | |
7625 | { | |
7626 | action = &ebb_table->actions[i]; | |
7627 | switch (action->action) | |
7628 | { | |
7629 | case ta_convert_longcall: | |
7630 | if (longcall_convert_count != 0) | |
7631 | { | |
7632 | action->action = ta_remove_longcall; | |
7633 | action->do_action = TRUE; | |
7634 | action->removed_bytes += 3; | |
7635 | longcall_convert_count--; | |
7636 | } | |
7637 | break; | |
7638 | case ta_narrow_insn: | |
7639 | if (narrowable_convert_count != 0) | |
7640 | { | |
7641 | action->do_action = TRUE; | |
7642 | action->removed_bytes += 1; | |
7643 | narrowable_convert_count--; | |
7644 | } | |
7645 | break; | |
7646 | case ta_widen_insn: | |
7647 | if (widenable_convert_count != 0) | |
7648 | { | |
7649 | action->do_action = TRUE; | |
7650 | action->removed_bytes -= 1; | |
7651 | widenable_convert_count--; | |
7652 | } | |
7653 | break; | |
7654 | default: | |
7655 | break; | |
e0001a05 | 7656 | } |
43cd72b9 BW |
7657 | } |
7658 | } | |
e0001a05 | 7659 | |
43cd72b9 BW |
7660 | /* Now we move on to some local opts. Try to remove each of the |
7661 | remaining longcalls. */ | |
e0001a05 | 7662 | |
43cd72b9 BW |
7663 | if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable) |
7664 | { | |
7665 | removed_bytes = 0; | |
7666 | for (i = 0; i < ebb_table->action_count; i++) | |
e0001a05 | 7667 | { |
43cd72b9 BW |
7668 | int old_removed_bytes = removed_bytes; |
7669 | proposed_action *action = &ebb_table->actions[i]; | |
7670 | ||
7671 | if (action->do_action && action->action == ta_convert_longcall) | |
7672 | { | |
7673 | bfd_boolean bad_alignment = FALSE; | |
7674 | removed_bytes += 3; | |
7675 | for (j = i + 1; j < ebb_table->action_count; j++) | |
7676 | { | |
7677 | proposed_action *new_action = &ebb_table->actions[j]; | |
7678 | bfd_vma offset = new_action->offset; | |
7679 | if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN) | |
7680 | { | |
7681 | if (!check_branch_target_aligned | |
7682 | (ebb_table->ebb.contents, | |
7683 | ebb_table->ebb.content_length, | |
7684 | offset, offset - removed_bytes)) | |
7685 | { | |
7686 | bad_alignment = TRUE; | |
7687 | break; | |
7688 | } | |
7689 | } | |
7690 | if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
7691 | { | |
7692 | if (!check_loop_aligned (ebb_table->ebb.contents, | |
7693 | ebb_table->ebb.content_length, | |
7694 | offset, | |
7695 | offset - removed_bytes)) | |
7696 | { | |
7697 | bad_alignment = TRUE; | |
7698 | break; | |
7699 | } | |
7700 | } | |
7701 | if (new_action->action == ta_narrow_insn | |
7702 | && !new_action->do_action | |
7703 | && ebb_table->ebb.sec->alignment_power == 2) | |
7704 | { | |
7705 | /* Narrow an instruction and we are done. */ | |
7706 | new_action->do_action = TRUE; | |
7707 | new_action->removed_bytes += 1; | |
7708 | bad_alignment = FALSE; | |
7709 | break; | |
7710 | } | |
7711 | if (new_action->action == ta_widen_insn | |
7712 | && new_action->do_action | |
7713 | && ebb_table->ebb.sec->alignment_power == 2) | |
7714 | { | |
7715 | /* Narrow an instruction and we are done. */ | |
7716 | new_action->do_action = FALSE; | |
7717 | new_action->removed_bytes += 1; | |
7718 | bad_alignment = FALSE; | |
7719 | break; | |
7720 | } | |
5c5d6806 BW |
7721 | if (new_action->do_action) |
7722 | removed_bytes += new_action->removed_bytes; | |
43cd72b9 BW |
7723 | } |
7724 | if (!bad_alignment) | |
7725 | { | |
7726 | action->removed_bytes += 3; | |
7727 | action->action = ta_remove_longcall; | |
7728 | action->do_action = TRUE; | |
7729 | } | |
7730 | } | |
7731 | removed_bytes = old_removed_bytes; | |
7732 | if (action->do_action) | |
7733 | removed_bytes += action->removed_bytes; | |
e0001a05 NC |
7734 | } |
7735 | } | |
7736 | ||
43cd72b9 BW |
7737 | removed_bytes = 0; |
7738 | for (i = 0; i < ebb_table->action_count; ++i) | |
7739 | { | |
7740 | proposed_action *action = &ebb_table->actions[i]; | |
7741 | if (action->do_action) | |
7742 | removed_bytes += action->removed_bytes; | |
7743 | } | |
7744 | ||
7745 | if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0 | |
7746 | && ebb->ends_unreachable) | |
7747 | { | |
7748 | proposed_action *action; | |
7749 | int br; | |
7750 | int extra_space; | |
7751 | ||
7752 | BFD_ASSERT (ebb_table->action_count != 0); | |
7753 | action = &ebb_table->actions[ebb_table->action_count - 1]; | |
7754 | BFD_ASSERT (action->action == ta_fill); | |
7755 | BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE); | |
7756 | ||
7757 | extra_space = compute_fill_extra_space (ebb->ends_unreachable); | |
7758 | br = action->removed_bytes + removed_bytes + extra_space; | |
7759 | br = br & ((1 << ebb->sec->alignment_power ) - 1); | |
7760 | ||
7761 | action->removed_bytes = extra_space - br; | |
7762 | } | |
7763 | return TRUE; | |
e0001a05 NC |
7764 | } |
7765 | ||
7766 | ||
03e94c08 BW |
7767 | /* The xlate_map is a sorted array of address mappings designed to |
7768 | answer the offset_with_removed_text() query with a binary search instead | |
7769 | of a linear search through the section's action_list. */ | |
7770 | ||
7771 | typedef struct xlate_map_entry xlate_map_entry_t; | |
7772 | typedef struct xlate_map xlate_map_t; | |
7773 | ||
7774 | struct xlate_map_entry | |
7775 | { | |
7776 | unsigned orig_address; | |
7777 | unsigned new_address; | |
7778 | unsigned size; | |
7779 | }; | |
7780 | ||
7781 | struct xlate_map | |
7782 | { | |
7783 | unsigned entry_count; | |
7784 | xlate_map_entry_t *entry; | |
7785 | }; | |
7786 | ||
7787 | ||
7788 | static int | |
7789 | xlate_compare (const void *a_v, const void *b_v) | |
7790 | { | |
7791 | const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v; | |
7792 | const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v; | |
7793 | if (a->orig_address < b->orig_address) | |
7794 | return -1; | |
7795 | if (a->orig_address > (b->orig_address + b->size - 1)) | |
7796 | return 1; | |
7797 | return 0; | |
7798 | } | |
7799 | ||
7800 | ||
7801 | static bfd_vma | |
7802 | xlate_offset_with_removed_text (const xlate_map_t *map, | |
7803 | text_action_list *action_list, | |
7804 | bfd_vma offset) | |
7805 | { | |
7806 | xlate_map_entry_t tmp; | |
7807 | void *r; | |
7808 | xlate_map_entry_t *e; | |
7809 | ||
7810 | if (map == NULL) | |
7811 | return offset_with_removed_text (action_list, offset); | |
7812 | ||
7813 | if (map->entry_count == 0) | |
7814 | return offset; | |
7815 | ||
7816 | tmp.orig_address = offset; | |
7817 | tmp.new_address = offset; | |
7818 | tmp.size = 1; | |
7819 | ||
7820 | r = bsearch (&offset, map->entry, map->entry_count, | |
7821 | sizeof (xlate_map_entry_t), &xlate_compare); | |
7822 | e = (xlate_map_entry_t *) r; | |
7823 | ||
7824 | BFD_ASSERT (e != NULL); | |
7825 | if (e == NULL) | |
7826 | return offset; | |
7827 | return e->new_address - e->orig_address + offset; | |
7828 | } | |
7829 | ||
7830 | ||
7831 | /* Build a binary searchable offset translation map from a section's | |
7832 | action list. */ | |
7833 | ||
7834 | static xlate_map_t * | |
7835 | build_xlate_map (asection *sec, xtensa_relax_info *relax_info) | |
7836 | { | |
7837 | xlate_map_t *map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t)); | |
7838 | text_action_list *action_list = &relax_info->action_list; | |
7839 | unsigned num_actions = 0; | |
7840 | text_action *r; | |
7841 | int removed; | |
7842 | xlate_map_entry_t *current_entry; | |
7843 | ||
7844 | if (map == NULL) | |
7845 | return NULL; | |
7846 | ||
7847 | num_actions = action_list_count (action_list); | |
7848 | map->entry = (xlate_map_entry_t *) | |
7849 | bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1)); | |
7850 | if (map->entry == NULL) | |
7851 | { | |
7852 | free (map); | |
7853 | return NULL; | |
7854 | } | |
7855 | map->entry_count = 0; | |
7856 | ||
7857 | removed = 0; | |
7858 | current_entry = &map->entry[0]; | |
7859 | ||
7860 | current_entry->orig_address = 0; | |
7861 | current_entry->new_address = 0; | |
7862 | current_entry->size = 0; | |
7863 | ||
7864 | for (r = action_list->head; r != NULL; r = r->next) | |
7865 | { | |
7866 | unsigned orig_size = 0; | |
7867 | switch (r->action) | |
7868 | { | |
7869 | case ta_none: | |
7870 | case ta_remove_insn: | |
7871 | case ta_convert_longcall: | |
7872 | case ta_remove_literal: | |
7873 | case ta_add_literal: | |
7874 | break; | |
7875 | case ta_remove_longcall: | |
7876 | orig_size = 6; | |
7877 | break; | |
7878 | case ta_narrow_insn: | |
7879 | orig_size = 3; | |
7880 | break; | |
7881 | case ta_widen_insn: | |
7882 | orig_size = 2; | |
7883 | break; | |
7884 | case ta_fill: | |
7885 | break; | |
7886 | } | |
7887 | current_entry->size = | |
7888 | r->offset + orig_size - current_entry->orig_address; | |
7889 | if (current_entry->size != 0) | |
7890 | { | |
7891 | current_entry++; | |
7892 | map->entry_count++; | |
7893 | } | |
7894 | current_entry->orig_address = r->offset + orig_size; | |
7895 | removed += r->removed_bytes; | |
7896 | current_entry->new_address = r->offset + orig_size - removed; | |
7897 | current_entry->size = 0; | |
7898 | } | |
7899 | ||
7900 | current_entry->size = (bfd_get_section_limit (sec->owner, sec) | |
7901 | - current_entry->orig_address); | |
7902 | if (current_entry->size != 0) | |
7903 | map->entry_count++; | |
7904 | ||
7905 | return map; | |
7906 | } | |
7907 | ||
7908 | ||
7909 | /* Free an offset translation map. */ | |
7910 | ||
7911 | static void | |
7912 | free_xlate_map (xlate_map_t *map) | |
7913 | { | |
7914 | if (map && map->entry) | |
7915 | free (map->entry); | |
7916 | if (map) | |
7917 | free (map); | |
7918 | } | |
7919 | ||
7920 | ||
43cd72b9 BW |
7921 | /* Use check_section_ebb_pcrels_fit to make sure that all of the |
7922 | relocations in a section will fit if a proposed set of actions | |
7923 | are performed. */ | |
e0001a05 | 7924 | |
43cd72b9 | 7925 | static bfd_boolean |
7fa3d080 BW |
7926 | check_section_ebb_pcrels_fit (bfd *abfd, |
7927 | asection *sec, | |
7928 | bfd_byte *contents, | |
7929 | Elf_Internal_Rela *internal_relocs, | |
cb337148 BW |
7930 | const ebb_constraint *constraint, |
7931 | const xtensa_opcode *reloc_opcodes) | |
e0001a05 | 7932 | { |
43cd72b9 BW |
7933 | unsigned i, j; |
7934 | Elf_Internal_Rela *irel; | |
03e94c08 BW |
7935 | xlate_map_t *xmap = NULL; |
7936 | bfd_boolean ok = TRUE; | |
43cd72b9 | 7937 | xtensa_relax_info *relax_info; |
e0001a05 | 7938 | |
43cd72b9 | 7939 | relax_info = get_xtensa_relax_info (sec); |
e0001a05 | 7940 | |
03e94c08 BW |
7941 | if (relax_info && sec->reloc_count > 100) |
7942 | { | |
7943 | xmap = build_xlate_map (sec, relax_info); | |
7944 | /* NULL indicates out of memory, but the slow version | |
7945 | can still be used. */ | |
7946 | } | |
7947 | ||
43cd72b9 BW |
7948 | for (i = 0; i < sec->reloc_count; i++) |
7949 | { | |
7950 | r_reloc r_rel; | |
7951 | bfd_vma orig_self_offset, orig_target_offset; | |
7952 | bfd_vma self_offset, target_offset; | |
7953 | int r_type; | |
7954 | reloc_howto_type *howto; | |
7955 | int self_removed_bytes, target_removed_bytes; | |
e0001a05 | 7956 | |
43cd72b9 BW |
7957 | irel = &internal_relocs[i]; |
7958 | r_type = ELF32_R_TYPE (irel->r_info); | |
e0001a05 | 7959 | |
43cd72b9 BW |
7960 | howto = &elf_howto_table[r_type]; |
7961 | /* We maintain the required invariant: PC-relative relocations | |
7962 | that fit before linking must fit after linking. Thus we only | |
7963 | need to deal with relocations to the same section that are | |
7964 | PC-relative. */ | |
1bbb5f21 BW |
7965 | if (r_type == R_XTENSA_ASM_SIMPLIFY |
7966 | || r_type == R_XTENSA_32_PCREL | |
43cd72b9 BW |
7967 | || !howto->pc_relative) |
7968 | continue; | |
e0001a05 | 7969 | |
43cd72b9 BW |
7970 | r_reloc_init (&r_rel, abfd, irel, contents, |
7971 | bfd_get_section_limit (abfd, sec)); | |
e0001a05 | 7972 | |
43cd72b9 BW |
7973 | if (r_reloc_get_section (&r_rel) != sec) |
7974 | continue; | |
e0001a05 | 7975 | |
43cd72b9 BW |
7976 | orig_self_offset = irel->r_offset; |
7977 | orig_target_offset = r_rel.target_offset; | |
e0001a05 | 7978 | |
43cd72b9 BW |
7979 | self_offset = orig_self_offset; |
7980 | target_offset = orig_target_offset; | |
7981 | ||
7982 | if (relax_info) | |
7983 | { | |
03e94c08 BW |
7984 | self_offset = |
7985 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7986 | orig_self_offset); | |
7987 | target_offset = | |
7988 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7989 | orig_target_offset); | |
43cd72b9 BW |
7990 | } |
7991 | ||
7992 | self_removed_bytes = 0; | |
7993 | target_removed_bytes = 0; | |
7994 | ||
7995 | for (j = 0; j < constraint->action_count; ++j) | |
7996 | { | |
7997 | proposed_action *action = &constraint->actions[j]; | |
7998 | bfd_vma offset = action->offset; | |
7999 | int removed_bytes = action->removed_bytes; | |
8000 | if (offset < orig_self_offset | |
8001 | || (offset == orig_self_offset && action->action == ta_fill | |
8002 | && action->removed_bytes < 0)) | |
8003 | self_removed_bytes += removed_bytes; | |
8004 | if (offset < orig_target_offset | |
8005 | || (offset == orig_target_offset && action->action == ta_fill | |
8006 | && action->removed_bytes < 0)) | |
8007 | target_removed_bytes += removed_bytes; | |
8008 | } | |
8009 | self_offset -= self_removed_bytes; | |
8010 | target_offset -= target_removed_bytes; | |
8011 | ||
8012 | /* Try to encode it. Get the operand and check. */ | |
8013 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
8014 | { | |
8015 | /* None of the current alternate relocs are PC-relative, | |
8016 | and only PC-relative relocs matter here. */ | |
8017 | } | |
8018 | else | |
8019 | { | |
8020 | xtensa_opcode opcode; | |
8021 | int opnum; | |
8022 | ||
cb337148 BW |
8023 | if (reloc_opcodes) |
8024 | opcode = reloc_opcodes[i]; | |
8025 | else | |
8026 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
43cd72b9 | 8027 | if (opcode == XTENSA_UNDEFINED) |
03e94c08 BW |
8028 | { |
8029 | ok = FALSE; | |
8030 | break; | |
8031 | } | |
43cd72b9 BW |
8032 | |
8033 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
8034 | if (opnum == XTENSA_UNDEFINED) | |
03e94c08 BW |
8035 | { |
8036 | ok = FALSE; | |
8037 | break; | |
8038 | } | |
43cd72b9 BW |
8039 | |
8040 | if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset)) | |
03e94c08 BW |
8041 | { |
8042 | ok = FALSE; | |
8043 | break; | |
8044 | } | |
43cd72b9 BW |
8045 | } |
8046 | } | |
8047 | ||
03e94c08 BW |
8048 | if (xmap) |
8049 | free_xlate_map (xmap); | |
8050 | ||
8051 | return ok; | |
43cd72b9 BW |
8052 | } |
8053 | ||
8054 | ||
8055 | static bfd_boolean | |
7fa3d080 | 8056 | check_section_ebb_reduces (const ebb_constraint *constraint) |
43cd72b9 BW |
8057 | { |
8058 | int removed = 0; | |
8059 | unsigned i; | |
8060 | ||
8061 | for (i = 0; i < constraint->action_count; i++) | |
8062 | { | |
8063 | const proposed_action *action = &constraint->actions[i]; | |
8064 | if (action->do_action) | |
8065 | removed += action->removed_bytes; | |
8066 | } | |
8067 | if (removed < 0) | |
e0001a05 NC |
8068 | return FALSE; |
8069 | ||
8070 | return TRUE; | |
8071 | } | |
8072 | ||
8073 | ||
43cd72b9 | 8074 | void |
7fa3d080 BW |
8075 | text_action_add_proposed (text_action_list *l, |
8076 | const ebb_constraint *ebb_table, | |
8077 | asection *sec) | |
e0001a05 NC |
8078 | { |
8079 | unsigned i; | |
8080 | ||
43cd72b9 | 8081 | for (i = 0; i < ebb_table->action_count; i++) |
e0001a05 | 8082 | { |
43cd72b9 | 8083 | proposed_action *action = &ebb_table->actions[i]; |
e0001a05 | 8084 | |
43cd72b9 | 8085 | if (!action->do_action) |
e0001a05 | 8086 | continue; |
43cd72b9 BW |
8087 | switch (action->action) |
8088 | { | |
8089 | case ta_remove_insn: | |
8090 | case ta_remove_longcall: | |
8091 | case ta_convert_longcall: | |
8092 | case ta_narrow_insn: | |
8093 | case ta_widen_insn: | |
8094 | case ta_fill: | |
8095 | case ta_remove_literal: | |
8096 | text_action_add (l, action->action, sec, action->offset, | |
8097 | action->removed_bytes); | |
8098 | break; | |
8099 | case ta_none: | |
8100 | break; | |
8101 | default: | |
8102 | BFD_ASSERT (0); | |
8103 | break; | |
8104 | } | |
e0001a05 | 8105 | } |
43cd72b9 | 8106 | } |
e0001a05 | 8107 | |
43cd72b9 BW |
8108 | |
8109 | int | |
7fa3d080 | 8110 | compute_fill_extra_space (property_table_entry *entry) |
43cd72b9 BW |
8111 | { |
8112 | int fill_extra_space; | |
8113 | ||
8114 | if (!entry) | |
8115 | return 0; | |
8116 | ||
8117 | if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0) | |
8118 | return 0; | |
8119 | ||
8120 | fill_extra_space = entry->size; | |
8121 | if ((entry->flags & XTENSA_PROP_ALIGN) != 0) | |
8122 | { | |
8123 | /* Fill bytes for alignment: | |
8124 | (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */ | |
8125 | int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags); | |
8126 | int nsm = (1 << pow) - 1; | |
8127 | bfd_vma addr = entry->address + entry->size; | |
8128 | bfd_vma align_fill = nsm - ((addr + nsm) & nsm); | |
8129 | fill_extra_space += align_fill; | |
8130 | } | |
8131 | return fill_extra_space; | |
e0001a05 NC |
8132 | } |
8133 | ||
43cd72b9 | 8134 | \f |
e0001a05 NC |
8135 | /* First relaxation pass. */ |
8136 | ||
43cd72b9 BW |
8137 | /* If the section contains relaxable literals, check each literal to |
8138 | see if it has the same value as another literal that has already | |
8139 | been seen, either in the current section or a previous one. If so, | |
8140 | add an entry to the per-section list of removed literals. The | |
e0001a05 NC |
8141 | actual changes are deferred until the next pass. */ |
8142 | ||
8143 | static bfd_boolean | |
7fa3d080 BW |
8144 | compute_removed_literals (bfd *abfd, |
8145 | asection *sec, | |
8146 | struct bfd_link_info *link_info, | |
8147 | value_map_hash_table *values) | |
e0001a05 NC |
8148 | { |
8149 | xtensa_relax_info *relax_info; | |
8150 | bfd_byte *contents; | |
8151 | Elf_Internal_Rela *internal_relocs; | |
43cd72b9 | 8152 | source_reloc *src_relocs, *rel; |
e0001a05 | 8153 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
8154 | property_table_entry *prop_table = NULL; |
8155 | int ptblsize; | |
8156 | int i, prev_i; | |
8157 | bfd_boolean last_loc_is_prev = FALSE; | |
8158 | bfd_vma last_target_offset = 0; | |
8159 | section_cache_t target_sec_cache; | |
8160 | bfd_size_type sec_size; | |
8161 | ||
8162 | init_section_cache (&target_sec_cache); | |
e0001a05 NC |
8163 | |
8164 | /* Do nothing if it is not a relaxable literal section. */ | |
8165 | relax_info = get_xtensa_relax_info (sec); | |
8166 | BFD_ASSERT (relax_info); | |
e0001a05 NC |
8167 | if (!relax_info->is_relaxable_literal_section) |
8168 | return ok; | |
8169 | ||
8170 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
8171 | link_info->keep_memory); | |
8172 | ||
43cd72b9 | 8173 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 | 8174 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 8175 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
8176 | { |
8177 | ok = FALSE; | |
8178 | goto error_return; | |
8179 | } | |
8180 | ||
8181 | /* Sort the source_relocs by target offset. */ | |
8182 | src_relocs = relax_info->src_relocs; | |
8183 | qsort (src_relocs, relax_info->src_count, | |
8184 | sizeof (source_reloc), source_reloc_compare); | |
43cd72b9 BW |
8185 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
8186 | internal_reloc_compare); | |
e0001a05 | 8187 | |
43cd72b9 BW |
8188 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
8189 | XTENSA_PROP_SEC_NAME, FALSE); | |
8190 | if (ptblsize < 0) | |
8191 | { | |
8192 | ok = FALSE; | |
8193 | goto error_return; | |
8194 | } | |
8195 | ||
8196 | prev_i = -1; | |
e0001a05 NC |
8197 | for (i = 0; i < relax_info->src_count; i++) |
8198 | { | |
e0001a05 | 8199 | Elf_Internal_Rela *irel = NULL; |
e0001a05 NC |
8200 | |
8201 | rel = &src_relocs[i]; | |
43cd72b9 BW |
8202 | if (get_l32r_opcode () != rel->opcode) |
8203 | continue; | |
e0001a05 NC |
8204 | irel = get_irel_at_offset (sec, internal_relocs, |
8205 | rel->r_rel.target_offset); | |
8206 | ||
43cd72b9 BW |
8207 | /* If the relocation on this is not a simple R_XTENSA_32 or |
8208 | R_XTENSA_PLT then do not consider it. This may happen when | |
8209 | the difference of two symbols is used in a literal. */ | |
8210 | if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32 | |
8211 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT)) | |
8212 | continue; | |
8213 | ||
e0001a05 NC |
8214 | /* If the target_offset for this relocation is the same as the |
8215 | previous relocation, then we've already considered whether the | |
8216 | literal can be coalesced. Skip to the next one.... */ | |
43cd72b9 BW |
8217 | if (i != 0 && prev_i != -1 |
8218 | && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset) | |
e0001a05 | 8219 | continue; |
43cd72b9 BW |
8220 | prev_i = i; |
8221 | ||
8222 | if (last_loc_is_prev && | |
8223 | last_target_offset + 4 != rel->r_rel.target_offset) | |
8224 | last_loc_is_prev = FALSE; | |
e0001a05 NC |
8225 | |
8226 | /* Check if the relocation was from an L32R that is being removed | |
8227 | because a CALLX was converted to a direct CALL, and check if | |
8228 | there are no other relocations to the literal. */ | |
99ded152 BW |
8229 | if (is_removable_literal (rel, i, src_relocs, relax_info->src_count, |
8230 | sec, prop_table, ptblsize)) | |
e0001a05 | 8231 | { |
43cd72b9 BW |
8232 | if (!remove_dead_literal (abfd, sec, link_info, internal_relocs, |
8233 | irel, rel, prop_table, ptblsize)) | |
e0001a05 | 8234 | { |
43cd72b9 BW |
8235 | ok = FALSE; |
8236 | goto error_return; | |
e0001a05 | 8237 | } |
43cd72b9 | 8238 | last_target_offset = rel->r_rel.target_offset; |
e0001a05 NC |
8239 | continue; |
8240 | } | |
8241 | ||
43cd72b9 BW |
8242 | if (!identify_literal_placement (abfd, sec, contents, link_info, |
8243 | values, | |
8244 | &last_loc_is_prev, irel, | |
8245 | relax_info->src_count - i, rel, | |
8246 | prop_table, ptblsize, | |
8247 | &target_sec_cache, rel->is_abs_literal)) | |
e0001a05 | 8248 | { |
43cd72b9 BW |
8249 | ok = FALSE; |
8250 | goto error_return; | |
8251 | } | |
8252 | last_target_offset = rel->r_rel.target_offset; | |
8253 | } | |
e0001a05 | 8254 | |
43cd72b9 BW |
8255 | #if DEBUG |
8256 | print_removed_literals (stderr, &relax_info->removed_list); | |
8257 | print_action_list (stderr, &relax_info->action_list); | |
8258 | #endif /* DEBUG */ | |
8259 | ||
8260 | error_return: | |
8261 | if (prop_table) free (prop_table); | |
8262 | clear_section_cache (&target_sec_cache); | |
8263 | ||
8264 | release_contents (sec, contents); | |
8265 | release_internal_relocs (sec, internal_relocs); | |
8266 | return ok; | |
8267 | } | |
8268 | ||
8269 | ||
8270 | static Elf_Internal_Rela * | |
7fa3d080 BW |
8271 | get_irel_at_offset (asection *sec, |
8272 | Elf_Internal_Rela *internal_relocs, | |
8273 | bfd_vma offset) | |
43cd72b9 BW |
8274 | { |
8275 | unsigned i; | |
8276 | Elf_Internal_Rela *irel; | |
8277 | unsigned r_type; | |
8278 | Elf_Internal_Rela key; | |
8279 | ||
8280 | if (!internal_relocs) | |
8281 | return NULL; | |
8282 | ||
8283 | key.r_offset = offset; | |
8284 | irel = bsearch (&key, internal_relocs, sec->reloc_count, | |
8285 | sizeof (Elf_Internal_Rela), internal_reloc_matches); | |
8286 | if (!irel) | |
8287 | return NULL; | |
8288 | ||
8289 | /* bsearch does not guarantee which will be returned if there are | |
8290 | multiple matches. We need the first that is not an alignment. */ | |
8291 | i = irel - internal_relocs; | |
8292 | while (i > 0) | |
8293 | { | |
8294 | if (internal_relocs[i-1].r_offset != offset) | |
8295 | break; | |
8296 | i--; | |
8297 | } | |
8298 | for ( ; i < sec->reloc_count; i++) | |
8299 | { | |
8300 | irel = &internal_relocs[i]; | |
8301 | r_type = ELF32_R_TYPE (irel->r_info); | |
8302 | if (irel->r_offset == offset && r_type != R_XTENSA_NONE) | |
8303 | return irel; | |
8304 | } | |
8305 | ||
8306 | return NULL; | |
8307 | } | |
8308 | ||
8309 | ||
8310 | bfd_boolean | |
7fa3d080 BW |
8311 | is_removable_literal (const source_reloc *rel, |
8312 | int i, | |
8313 | const source_reloc *src_relocs, | |
99ded152 BW |
8314 | int src_count, |
8315 | asection *sec, | |
8316 | property_table_entry *prop_table, | |
8317 | int ptblsize) | |
43cd72b9 BW |
8318 | { |
8319 | const source_reloc *curr_rel; | |
99ded152 BW |
8320 | property_table_entry *entry; |
8321 | ||
43cd72b9 BW |
8322 | if (!rel->is_null) |
8323 | return FALSE; | |
8324 | ||
99ded152 BW |
8325 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, |
8326 | sec->vma + rel->r_rel.target_offset); | |
8327 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) | |
8328 | return FALSE; | |
8329 | ||
43cd72b9 BW |
8330 | for (++i; i < src_count; ++i) |
8331 | { | |
8332 | curr_rel = &src_relocs[i]; | |
8333 | /* If all others have the same target offset.... */ | |
8334 | if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset) | |
8335 | return TRUE; | |
8336 | ||
8337 | if (!curr_rel->is_null | |
8338 | && !xtensa_is_property_section (curr_rel->source_sec) | |
8339 | && !(curr_rel->source_sec->flags & SEC_DEBUGGING)) | |
8340 | return FALSE; | |
8341 | } | |
8342 | return TRUE; | |
8343 | } | |
8344 | ||
8345 | ||
8346 | bfd_boolean | |
7fa3d080 BW |
8347 | remove_dead_literal (bfd *abfd, |
8348 | asection *sec, | |
8349 | struct bfd_link_info *link_info, | |
8350 | Elf_Internal_Rela *internal_relocs, | |
8351 | Elf_Internal_Rela *irel, | |
8352 | source_reloc *rel, | |
8353 | property_table_entry *prop_table, | |
8354 | int ptblsize) | |
43cd72b9 BW |
8355 | { |
8356 | property_table_entry *entry; | |
8357 | xtensa_relax_info *relax_info; | |
8358 | ||
8359 | relax_info = get_xtensa_relax_info (sec); | |
8360 | if (!relax_info) | |
8361 | return FALSE; | |
8362 | ||
8363 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8364 | sec->vma + rel->r_rel.target_offset); | |
8365 | ||
8366 | /* Mark the unused literal so that it will be removed. */ | |
8367 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL); | |
8368 | ||
8369 | text_action_add (&relax_info->action_list, | |
8370 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8371 | ||
8372 | /* If the section is 4-byte aligned, do not add fill. */ | |
8373 | if (sec->alignment_power > 2) | |
8374 | { | |
8375 | int fill_extra_space; | |
8376 | bfd_vma entry_sec_offset; | |
8377 | text_action *fa; | |
8378 | property_table_entry *the_add_entry; | |
8379 | int removed_diff; | |
8380 | ||
8381 | if (entry) | |
8382 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
8383 | else | |
8384 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
8385 | ||
8386 | /* If the literal range is at the end of the section, | |
8387 | do not add fill. */ | |
8388 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8389 | entry_sec_offset); | |
8390 | fill_extra_space = compute_fill_extra_space (the_add_entry); | |
8391 | ||
8392 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8393 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8394 | -4, fill_extra_space); | |
8395 | if (fa) | |
8396 | adjust_fill_action (fa, removed_diff); | |
8397 | else | |
8398 | text_action_add (&relax_info->action_list, | |
8399 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8400 | } | |
8401 | ||
8402 | /* Zero out the relocation on this literal location. */ | |
8403 | if (irel) | |
8404 | { | |
8405 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8406 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8407 | ||
8408 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8409 | pin_internal_relocs (sec, internal_relocs); | |
8410 | } | |
8411 | ||
8412 | /* Do not modify "last_loc_is_prev". */ | |
8413 | return TRUE; | |
8414 | } | |
8415 | ||
8416 | ||
8417 | bfd_boolean | |
7fa3d080 BW |
8418 | identify_literal_placement (bfd *abfd, |
8419 | asection *sec, | |
8420 | bfd_byte *contents, | |
8421 | struct bfd_link_info *link_info, | |
8422 | value_map_hash_table *values, | |
8423 | bfd_boolean *last_loc_is_prev_p, | |
8424 | Elf_Internal_Rela *irel, | |
8425 | int remaining_src_rels, | |
8426 | source_reloc *rel, | |
8427 | property_table_entry *prop_table, | |
8428 | int ptblsize, | |
8429 | section_cache_t *target_sec_cache, | |
8430 | bfd_boolean is_abs_literal) | |
43cd72b9 BW |
8431 | { |
8432 | literal_value val; | |
8433 | value_map *val_map; | |
8434 | xtensa_relax_info *relax_info; | |
8435 | bfd_boolean literal_placed = FALSE; | |
8436 | r_reloc r_rel; | |
8437 | unsigned long value; | |
8438 | bfd_boolean final_static_link; | |
8439 | bfd_size_type sec_size; | |
8440 | ||
8441 | relax_info = get_xtensa_relax_info (sec); | |
8442 | if (!relax_info) | |
8443 | return FALSE; | |
8444 | ||
8445 | sec_size = bfd_get_section_limit (abfd, sec); | |
8446 | ||
8447 | final_static_link = | |
8448 | (!link_info->relocatable | |
8449 | && !elf_hash_table (link_info)->dynamic_sections_created); | |
8450 | ||
8451 | /* The placement algorithm first checks to see if the literal is | |
8452 | already in the value map. If so and the value map is reachable | |
8453 | from all uses, then the literal is moved to that location. If | |
8454 | not, then we identify the last location where a fresh literal was | |
8455 | placed. If the literal can be safely moved there, then we do so. | |
8456 | If not, then we assume that the literal is not to move and leave | |
8457 | the literal where it is, marking it as the last literal | |
8458 | location. */ | |
8459 | ||
8460 | /* Find the literal value. */ | |
8461 | value = 0; | |
8462 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8463 | if (!irel) | |
8464 | { | |
8465 | BFD_ASSERT (rel->r_rel.target_offset < sec_size); | |
8466 | value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset); | |
8467 | } | |
8468 | init_literal_value (&val, &r_rel, value, is_abs_literal); | |
8469 | ||
8470 | /* Check if we've seen another literal with the same value that | |
8471 | is in the same output section. */ | |
8472 | val_map = value_map_get_cached_value (values, &val, final_static_link); | |
8473 | ||
8474 | if (val_map | |
8475 | && (r_reloc_get_section (&val_map->loc)->output_section | |
8476 | == sec->output_section) | |
8477 | && relocations_reach (rel, remaining_src_rels, &val_map->loc) | |
8478 | && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map)) | |
8479 | { | |
8480 | /* No change to last_loc_is_prev. */ | |
8481 | literal_placed = TRUE; | |
8482 | } | |
8483 | ||
8484 | /* For relocatable links, do not try to move literals. To do it | |
8485 | correctly might increase the number of relocations in an input | |
8486 | section making the default relocatable linking fail. */ | |
8487 | if (!link_info->relocatable && !literal_placed | |
8488 | && values->has_last_loc && !(*last_loc_is_prev_p)) | |
8489 | { | |
8490 | asection *target_sec = r_reloc_get_section (&values->last_loc); | |
8491 | if (target_sec && target_sec->output_section == sec->output_section) | |
8492 | { | |
8493 | /* Increment the virtual offset. */ | |
8494 | r_reloc try_loc = values->last_loc; | |
8495 | try_loc.virtual_offset += 4; | |
8496 | ||
8497 | /* There is a last loc that was in the same output section. */ | |
8498 | if (relocations_reach (rel, remaining_src_rels, &try_loc) | |
8499 | && move_shared_literal (sec, link_info, rel, | |
8500 | prop_table, ptblsize, | |
8501 | &try_loc, &val, target_sec_cache)) | |
e0001a05 | 8502 | { |
43cd72b9 BW |
8503 | values->last_loc.virtual_offset += 4; |
8504 | literal_placed = TRUE; | |
8505 | if (!val_map) | |
8506 | val_map = add_value_map (values, &val, &try_loc, | |
8507 | final_static_link); | |
8508 | else | |
8509 | val_map->loc = try_loc; | |
e0001a05 NC |
8510 | } |
8511 | } | |
43cd72b9 BW |
8512 | } |
8513 | ||
8514 | if (!literal_placed) | |
8515 | { | |
8516 | /* Nothing worked, leave the literal alone but update the last loc. */ | |
8517 | values->has_last_loc = TRUE; | |
8518 | values->last_loc = rel->r_rel; | |
8519 | if (!val_map) | |
8520 | val_map = add_value_map (values, &val, &rel->r_rel, final_static_link); | |
e0001a05 | 8521 | else |
43cd72b9 BW |
8522 | val_map->loc = rel->r_rel; |
8523 | *last_loc_is_prev_p = TRUE; | |
e0001a05 NC |
8524 | } |
8525 | ||
43cd72b9 | 8526 | return TRUE; |
e0001a05 NC |
8527 | } |
8528 | ||
8529 | ||
8530 | /* Check if the original relocations (presumably on L32R instructions) | |
8531 | identified by reloc[0..N] can be changed to reference the literal | |
8532 | identified by r_rel. If r_rel is out of range for any of the | |
8533 | original relocations, then we don't want to coalesce the original | |
8534 | literal with the one at r_rel. We only check reloc[0..N], where the | |
8535 | offsets are all the same as for reloc[0] (i.e., they're all | |
8536 | referencing the same literal) and where N is also bounded by the | |
8537 | number of remaining entries in the "reloc" array. The "reloc" array | |
8538 | is sorted by target offset so we know all the entries for the same | |
8539 | literal will be contiguous. */ | |
8540 | ||
8541 | static bfd_boolean | |
7fa3d080 BW |
8542 | relocations_reach (source_reloc *reloc, |
8543 | int remaining_relocs, | |
8544 | const r_reloc *r_rel) | |
e0001a05 NC |
8545 | { |
8546 | bfd_vma from_offset, source_address, dest_address; | |
8547 | asection *sec; | |
8548 | int i; | |
8549 | ||
8550 | if (!r_reloc_is_defined (r_rel)) | |
8551 | return FALSE; | |
8552 | ||
8553 | sec = r_reloc_get_section (r_rel); | |
8554 | from_offset = reloc[0].r_rel.target_offset; | |
8555 | ||
8556 | for (i = 0; i < remaining_relocs; i++) | |
8557 | { | |
8558 | if (reloc[i].r_rel.target_offset != from_offset) | |
8559 | break; | |
8560 | ||
8561 | /* Ignore relocations that have been removed. */ | |
8562 | if (reloc[i].is_null) | |
8563 | continue; | |
8564 | ||
8565 | /* The original and new output section for these must be the same | |
8566 | in order to coalesce. */ | |
8567 | if (r_reloc_get_section (&reloc[i].r_rel)->output_section | |
8568 | != sec->output_section) | |
8569 | return FALSE; | |
8570 | ||
d638e0ac BW |
8571 | /* Absolute literals in the same output section can always be |
8572 | combined. */ | |
8573 | if (reloc[i].is_abs_literal) | |
8574 | continue; | |
8575 | ||
43cd72b9 BW |
8576 | /* A literal with no PC-relative relocations can be moved anywhere. */ |
8577 | if (reloc[i].opnd != -1) | |
e0001a05 NC |
8578 | { |
8579 | /* Otherwise, check to see that it fits. */ | |
8580 | source_address = (reloc[i].source_sec->output_section->vma | |
8581 | + reloc[i].source_sec->output_offset | |
8582 | + reloc[i].r_rel.rela.r_offset); | |
8583 | dest_address = (sec->output_section->vma | |
8584 | + sec->output_offset | |
8585 | + r_rel->target_offset); | |
8586 | ||
43cd72b9 BW |
8587 | if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd, |
8588 | source_address, dest_address)) | |
e0001a05 NC |
8589 | return FALSE; |
8590 | } | |
8591 | } | |
8592 | ||
8593 | return TRUE; | |
8594 | } | |
8595 | ||
8596 | ||
43cd72b9 BW |
8597 | /* Move a literal to another literal location because it is |
8598 | the same as the other literal value. */ | |
e0001a05 | 8599 | |
43cd72b9 | 8600 | static bfd_boolean |
7fa3d080 BW |
8601 | coalesce_shared_literal (asection *sec, |
8602 | source_reloc *rel, | |
8603 | property_table_entry *prop_table, | |
8604 | int ptblsize, | |
8605 | value_map *val_map) | |
e0001a05 | 8606 | { |
43cd72b9 BW |
8607 | property_table_entry *entry; |
8608 | text_action *fa; | |
8609 | property_table_entry *the_add_entry; | |
8610 | int removed_diff; | |
8611 | xtensa_relax_info *relax_info; | |
8612 | ||
8613 | relax_info = get_xtensa_relax_info (sec); | |
8614 | if (!relax_info) | |
8615 | return FALSE; | |
8616 | ||
8617 | entry = elf_xtensa_find_property_entry | |
8618 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
99ded152 | 8619 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) |
43cd72b9 BW |
8620 | return TRUE; |
8621 | ||
8622 | /* Mark that the literal will be coalesced. */ | |
8623 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc); | |
8624 | ||
8625 | text_action_add (&relax_info->action_list, | |
8626 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8627 | ||
8628 | /* If the section is 4-byte aligned, do not add fill. */ | |
8629 | if (sec->alignment_power > 2) | |
e0001a05 | 8630 | { |
43cd72b9 BW |
8631 | int fill_extra_space; |
8632 | bfd_vma entry_sec_offset; | |
8633 | ||
8634 | if (entry) | |
8635 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
8636 | else | |
8637 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
8638 | ||
8639 | /* If the literal range is at the end of the section, | |
8640 | do not add fill. */ | |
8641 | fill_extra_space = 0; | |
8642 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8643 | entry_sec_offset); | |
8644 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8645 | fill_extra_space = the_add_entry->size; | |
8646 | ||
8647 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8648 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8649 | -4, fill_extra_space); | |
8650 | if (fa) | |
8651 | adjust_fill_action (fa, removed_diff); | |
8652 | else | |
8653 | text_action_add (&relax_info->action_list, | |
8654 | ta_fill, sec, entry_sec_offset, removed_diff); | |
e0001a05 | 8655 | } |
43cd72b9 BW |
8656 | |
8657 | return TRUE; | |
8658 | } | |
8659 | ||
8660 | ||
8661 | /* Move a literal to another location. This may actually increase the | |
8662 | total amount of space used because of alignments so we need to do | |
8663 | this carefully. Also, it may make a branch go out of range. */ | |
8664 | ||
8665 | static bfd_boolean | |
7fa3d080 BW |
8666 | move_shared_literal (asection *sec, |
8667 | struct bfd_link_info *link_info, | |
8668 | source_reloc *rel, | |
8669 | property_table_entry *prop_table, | |
8670 | int ptblsize, | |
8671 | const r_reloc *target_loc, | |
8672 | const literal_value *lit_value, | |
8673 | section_cache_t *target_sec_cache) | |
43cd72b9 BW |
8674 | { |
8675 | property_table_entry *the_add_entry, *src_entry, *target_entry = NULL; | |
8676 | text_action *fa, *target_fa; | |
8677 | int removed_diff; | |
8678 | xtensa_relax_info *relax_info, *target_relax_info; | |
8679 | asection *target_sec; | |
8680 | ebb_t *ebb; | |
8681 | ebb_constraint ebb_table; | |
8682 | bfd_boolean relocs_fit; | |
8683 | ||
8684 | /* If this routine always returns FALSE, the literals that cannot be | |
8685 | coalesced will not be moved. */ | |
8686 | if (elf32xtensa_no_literal_movement) | |
8687 | return FALSE; | |
8688 | ||
8689 | relax_info = get_xtensa_relax_info (sec); | |
8690 | if (!relax_info) | |
8691 | return FALSE; | |
8692 | ||
8693 | target_sec = r_reloc_get_section (target_loc); | |
8694 | target_relax_info = get_xtensa_relax_info (target_sec); | |
8695 | ||
8696 | /* Literals to undefined sections may not be moved because they | |
8697 | must report an error. */ | |
8698 | if (bfd_is_und_section (target_sec)) | |
8699 | return FALSE; | |
8700 | ||
8701 | src_entry = elf_xtensa_find_property_entry | |
8702 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
8703 | ||
8704 | if (!section_cache_section (target_sec_cache, target_sec, link_info)) | |
8705 | return FALSE; | |
8706 | ||
8707 | target_entry = elf_xtensa_find_property_entry | |
8708 | (target_sec_cache->ptbl, target_sec_cache->pte_count, | |
8709 | target_sec->vma + target_loc->target_offset); | |
8710 | ||
8711 | if (!target_entry) | |
8712 | return FALSE; | |
8713 | ||
8714 | /* Make sure that we have not broken any branches. */ | |
8715 | relocs_fit = FALSE; | |
8716 | ||
8717 | init_ebb_constraint (&ebb_table); | |
8718 | ebb = &ebb_table.ebb; | |
8719 | init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents, | |
8720 | target_sec_cache->content_length, | |
8721 | target_sec_cache->ptbl, target_sec_cache->pte_count, | |
8722 | target_sec_cache->relocs, target_sec_cache->reloc_count); | |
8723 | ||
8724 | /* Propose to add 4 bytes + worst-case alignment size increase to | |
8725 | destination. */ | |
8726 | ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0, | |
8727 | ta_fill, target_loc->target_offset, | |
8728 | -4 - (1 << target_sec->alignment_power), TRUE); | |
8729 | ||
8730 | /* Check all of the PC-relative relocations to make sure they still fit. */ | |
8731 | relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec, | |
8732 | target_sec_cache->contents, | |
8733 | target_sec_cache->relocs, | |
cb337148 | 8734 | &ebb_table, NULL); |
43cd72b9 BW |
8735 | |
8736 | if (!relocs_fit) | |
8737 | return FALSE; | |
8738 | ||
8739 | text_action_add_literal (&target_relax_info->action_list, | |
8740 | ta_add_literal, target_loc, lit_value, -4); | |
8741 | ||
8742 | if (target_sec->alignment_power > 2 && target_entry != src_entry) | |
8743 | { | |
8744 | /* May need to add or remove some fill to maintain alignment. */ | |
8745 | int fill_extra_space; | |
8746 | bfd_vma entry_sec_offset; | |
8747 | ||
8748 | entry_sec_offset = | |
8749 | target_entry->address - target_sec->vma + target_entry->size; | |
8750 | ||
8751 | /* If the literal range is at the end of the section, | |
8752 | do not add fill. */ | |
8753 | fill_extra_space = 0; | |
8754 | the_add_entry = | |
8755 | elf_xtensa_find_property_entry (target_sec_cache->ptbl, | |
8756 | target_sec_cache->pte_count, | |
8757 | entry_sec_offset); | |
8758 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8759 | fill_extra_space = the_add_entry->size; | |
8760 | ||
8761 | target_fa = find_fill_action (&target_relax_info->action_list, | |
8762 | target_sec, entry_sec_offset); | |
8763 | removed_diff = compute_removed_action_diff (target_fa, target_sec, | |
8764 | entry_sec_offset, 4, | |
8765 | fill_extra_space); | |
8766 | if (target_fa) | |
8767 | adjust_fill_action (target_fa, removed_diff); | |
8768 | else | |
8769 | text_action_add (&target_relax_info->action_list, | |
8770 | ta_fill, target_sec, entry_sec_offset, removed_diff); | |
8771 | } | |
8772 | ||
8773 | /* Mark that the literal will be moved to the new location. */ | |
8774 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc); | |
8775 | ||
8776 | /* Remove the literal. */ | |
8777 | text_action_add (&relax_info->action_list, | |
8778 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8779 | ||
8780 | /* If the section is 4-byte aligned, do not add fill. */ | |
8781 | if (sec->alignment_power > 2 && target_entry != src_entry) | |
8782 | { | |
8783 | int fill_extra_space; | |
8784 | bfd_vma entry_sec_offset; | |
8785 | ||
8786 | if (src_entry) | |
8787 | entry_sec_offset = src_entry->address - sec->vma + src_entry->size; | |
8788 | else | |
8789 | entry_sec_offset = rel->r_rel.target_offset+4; | |
8790 | ||
8791 | /* If the literal range is at the end of the section, | |
8792 | do not add fill. */ | |
8793 | fill_extra_space = 0; | |
8794 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8795 | entry_sec_offset); | |
8796 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8797 | fill_extra_space = the_add_entry->size; | |
8798 | ||
8799 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8800 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8801 | -4, fill_extra_space); | |
8802 | if (fa) | |
8803 | adjust_fill_action (fa, removed_diff); | |
8804 | else | |
8805 | text_action_add (&relax_info->action_list, | |
8806 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8807 | } | |
8808 | ||
8809 | return TRUE; | |
e0001a05 NC |
8810 | } |
8811 | ||
8812 | \f | |
8813 | /* Second relaxation pass. */ | |
8814 | ||
8815 | /* Modify all of the relocations to point to the right spot, and if this | |
8816 | is a relaxable section, delete the unwanted literals and fix the | |
43cd72b9 | 8817 | section size. */ |
e0001a05 | 8818 | |
43cd72b9 | 8819 | bfd_boolean |
7fa3d080 | 8820 | relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info) |
e0001a05 NC |
8821 | { |
8822 | Elf_Internal_Rela *internal_relocs; | |
8823 | xtensa_relax_info *relax_info; | |
8824 | bfd_byte *contents; | |
8825 | bfd_boolean ok = TRUE; | |
8826 | unsigned i; | |
43cd72b9 BW |
8827 | bfd_boolean rv = FALSE; |
8828 | bfd_boolean virtual_action; | |
8829 | bfd_size_type sec_size; | |
e0001a05 | 8830 | |
43cd72b9 | 8831 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8832 | relax_info = get_xtensa_relax_info (sec); |
8833 | BFD_ASSERT (relax_info); | |
8834 | ||
43cd72b9 BW |
8835 | /* First translate any of the fixes that have been added already. */ |
8836 | translate_section_fixes (sec); | |
8837 | ||
e0001a05 NC |
8838 | /* Handle property sections (e.g., literal tables) specially. */ |
8839 | if (xtensa_is_property_section (sec)) | |
8840 | { | |
8841 | BFD_ASSERT (!relax_info->is_relaxable_literal_section); | |
8842 | return relax_property_section (abfd, sec, link_info); | |
8843 | } | |
8844 | ||
43cd72b9 BW |
8845 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8846 | link_info->keep_memory); | |
8847 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
8848 | if (contents == NULL && sec_size != 0) | |
8849 | { | |
8850 | ok = FALSE; | |
8851 | goto error_return; | |
8852 | } | |
8853 | ||
8854 | if (internal_relocs) | |
8855 | { | |
8856 | for (i = 0; i < sec->reloc_count; i++) | |
8857 | { | |
8858 | Elf_Internal_Rela *irel; | |
8859 | xtensa_relax_info *target_relax_info; | |
8860 | bfd_vma source_offset, old_source_offset; | |
8861 | r_reloc r_rel; | |
8862 | unsigned r_type; | |
8863 | asection *target_sec; | |
8864 | ||
8865 | /* Locally change the source address. | |
8866 | Translate the target to the new target address. | |
8867 | If it points to this section and has been removed, | |
8868 | NULLify it. | |
8869 | Write it back. */ | |
8870 | ||
8871 | irel = &internal_relocs[i]; | |
8872 | source_offset = irel->r_offset; | |
8873 | old_source_offset = source_offset; | |
8874 | ||
8875 | r_type = ELF32_R_TYPE (irel->r_info); | |
8876 | r_reloc_init (&r_rel, abfd, irel, contents, | |
8877 | bfd_get_section_limit (abfd, sec)); | |
8878 | ||
8879 | /* If this section could have changed then we may need to | |
8880 | change the relocation's offset. */ | |
8881 | ||
8882 | if (relax_info->is_relaxable_literal_section | |
8883 | || relax_info->is_relaxable_asm_section) | |
8884 | { | |
9b7f5d20 BW |
8885 | pin_internal_relocs (sec, internal_relocs); |
8886 | ||
43cd72b9 BW |
8887 | if (r_type != R_XTENSA_NONE |
8888 | && find_removed_literal (&relax_info->removed_list, | |
8889 | irel->r_offset)) | |
8890 | { | |
8891 | /* Remove this relocation. */ | |
8892 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8893 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8894 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8895 | irel->r_offset = offset_with_removed_text | |
8896 | (&relax_info->action_list, irel->r_offset); | |
43cd72b9 BW |
8897 | continue; |
8898 | } | |
8899 | ||
8900 | if (r_type == R_XTENSA_ASM_SIMPLIFY) | |
8901 | { | |
8902 | text_action *action = | |
8903 | find_insn_action (&relax_info->action_list, | |
8904 | irel->r_offset); | |
8905 | if (action && (action->action == ta_convert_longcall | |
8906 | || action->action == ta_remove_longcall)) | |
8907 | { | |
8908 | bfd_reloc_status_type retval; | |
8909 | char *error_message = NULL; | |
8910 | ||
8911 | retval = contract_asm_expansion (contents, sec_size, | |
8912 | irel, &error_message); | |
8913 | if (retval != bfd_reloc_ok) | |
8914 | { | |
8915 | (*link_info->callbacks->reloc_dangerous) | |
8916 | (link_info, error_message, abfd, sec, | |
8917 | irel->r_offset); | |
8918 | goto error_return; | |
8919 | } | |
8920 | /* Update the action so that the code that moves | |
8921 | the contents will do the right thing. */ | |
8922 | if (action->action == ta_remove_longcall) | |
8923 | action->action = ta_remove_insn; | |
8924 | else | |
8925 | action->action = ta_none; | |
8926 | /* Refresh the info in the r_rel. */ | |
8927 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8928 | r_type = ELF32_R_TYPE (irel->r_info); | |
8929 | } | |
8930 | } | |
8931 | ||
8932 | source_offset = offset_with_removed_text | |
8933 | (&relax_info->action_list, irel->r_offset); | |
8934 | irel->r_offset = source_offset; | |
8935 | } | |
8936 | ||
8937 | /* If the target section could have changed then | |
8938 | we may need to change the relocation's target offset. */ | |
8939 | ||
8940 | target_sec = r_reloc_get_section (&r_rel); | |
43cd72b9 | 8941 | |
ae326da8 BW |
8942 | /* For a reference to a discarded section from a DWARF section, |
8943 | i.e., where action_discarded is PRETEND, the symbol will | |
8944 | eventually be modified to refer to the kept section (at least if | |
8945 | the kept and discarded sections are the same size). Anticipate | |
8946 | that here and adjust things accordingly. */ | |
8947 | if (! elf_xtensa_ignore_discarded_relocs (sec) | |
8948 | && elf_xtensa_action_discarded (sec) == PRETEND | |
8949 | && sec->sec_info_type != ELF_INFO_TYPE_STABS | |
8950 | && target_sec != NULL | |
8951 | && elf_discarded_section (target_sec)) | |
8952 | { | |
8953 | /* It would be natural to call _bfd_elf_check_kept_section | |
8954 | here, but it's not exported from elflink.c. It's also a | |
8955 | fairly expensive check. Adjusting the relocations to the | |
8956 | discarded section is fairly harmless; it will only adjust | |
8957 | some addends and difference values. If it turns out that | |
8958 | _bfd_elf_check_kept_section fails later, it won't matter, | |
8959 | so just compare the section names to find the right group | |
8960 | member. */ | |
8961 | asection *kept = target_sec->kept_section; | |
8962 | if (kept != NULL) | |
8963 | { | |
8964 | if ((kept->flags & SEC_GROUP) != 0) | |
8965 | { | |
8966 | asection *first = elf_next_in_group (kept); | |
8967 | asection *s = first; | |
8968 | ||
8969 | kept = NULL; | |
8970 | while (s != NULL) | |
8971 | { | |
8972 | if (strcmp (s->name, target_sec->name) == 0) | |
8973 | { | |
8974 | kept = s; | |
8975 | break; | |
8976 | } | |
8977 | s = elf_next_in_group (s); | |
8978 | if (s == first) | |
8979 | break; | |
8980 | } | |
8981 | } | |
8982 | } | |
8983 | if (kept != NULL | |
8984 | && ((target_sec->rawsize != 0 | |
8985 | ? target_sec->rawsize : target_sec->size) | |
8986 | == (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
8987 | target_sec = kept; | |
8988 | } | |
8989 | ||
8990 | target_relax_info = get_xtensa_relax_info (target_sec); | |
43cd72b9 BW |
8991 | if (target_relax_info |
8992 | && (target_relax_info->is_relaxable_literal_section | |
8993 | || target_relax_info->is_relaxable_asm_section)) | |
8994 | { | |
8995 | r_reloc new_reloc; | |
9b7f5d20 | 8996 | target_sec = translate_reloc (&r_rel, &new_reloc, target_sec); |
43cd72b9 BW |
8997 | |
8998 | if (r_type == R_XTENSA_DIFF8 | |
8999 | || r_type == R_XTENSA_DIFF16 | |
9000 | || r_type == R_XTENSA_DIFF32) | |
9001 | { | |
9002 | bfd_vma diff_value = 0, new_end_offset, diff_mask = 0; | |
9003 | ||
9004 | if (bfd_get_section_limit (abfd, sec) < old_source_offset) | |
9005 | { | |
9006 | (*link_info->callbacks->reloc_dangerous) | |
9007 | (link_info, _("invalid relocation address"), | |
9008 | abfd, sec, old_source_offset); | |
9009 | goto error_return; | |
9010 | } | |
9011 | ||
9012 | switch (r_type) | |
9013 | { | |
9014 | case R_XTENSA_DIFF8: | |
9015 | diff_value = | |
9016 | bfd_get_8 (abfd, &contents[old_source_offset]); | |
9017 | break; | |
9018 | case R_XTENSA_DIFF16: | |
9019 | diff_value = | |
9020 | bfd_get_16 (abfd, &contents[old_source_offset]); | |
9021 | break; | |
9022 | case R_XTENSA_DIFF32: | |
9023 | diff_value = | |
9024 | bfd_get_32 (abfd, &contents[old_source_offset]); | |
9025 | break; | |
9026 | } | |
9027 | ||
9028 | new_end_offset = offset_with_removed_text | |
9029 | (&target_relax_info->action_list, | |
9030 | r_rel.target_offset + diff_value); | |
9031 | diff_value = new_end_offset - new_reloc.target_offset; | |
9032 | ||
9033 | switch (r_type) | |
9034 | { | |
9035 | case R_XTENSA_DIFF8: | |
9036 | diff_mask = 0xff; | |
9037 | bfd_put_8 (abfd, diff_value, | |
9038 | &contents[old_source_offset]); | |
9039 | break; | |
9040 | case R_XTENSA_DIFF16: | |
9041 | diff_mask = 0xffff; | |
9042 | bfd_put_16 (abfd, diff_value, | |
9043 | &contents[old_source_offset]); | |
9044 | break; | |
9045 | case R_XTENSA_DIFF32: | |
9046 | diff_mask = 0xffffffff; | |
9047 | bfd_put_32 (abfd, diff_value, | |
9048 | &contents[old_source_offset]); | |
9049 | break; | |
9050 | } | |
9051 | ||
9052 | /* Check for overflow. */ | |
9053 | if ((diff_value & ~diff_mask) != 0) | |
9054 | { | |
9055 | (*link_info->callbacks->reloc_dangerous) | |
9056 | (link_info, _("overflow after relaxation"), | |
9057 | abfd, sec, old_source_offset); | |
9058 | goto error_return; | |
9059 | } | |
9060 | ||
9061 | pin_contents (sec, contents); | |
9062 | } | |
dc96b90a BW |
9063 | |
9064 | /* If the relocation still references a section in the same | |
9065 | input file, modify the relocation directly instead of | |
9066 | adding a "fix" record. */ | |
9067 | if (target_sec->owner == abfd) | |
9068 | { | |
9069 | unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info); | |
9070 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
9071 | irel->r_addend = new_reloc.rela.r_addend; | |
9072 | pin_internal_relocs (sec, internal_relocs); | |
9073 | } | |
9b7f5d20 BW |
9074 | else |
9075 | { | |
dc96b90a BW |
9076 | bfd_vma addend_displacement; |
9077 | reloc_bfd_fix *fix; | |
9078 | ||
9079 | addend_displacement = | |
9080 | new_reloc.target_offset + new_reloc.virtual_offset; | |
9081 | fix = reloc_bfd_fix_init (sec, source_offset, r_type, | |
9082 | target_sec, | |
9083 | addend_displacement, TRUE); | |
9084 | add_fix (sec, fix); | |
9b7f5d20 | 9085 | } |
43cd72b9 | 9086 | } |
43cd72b9 BW |
9087 | } |
9088 | } | |
9089 | ||
9090 | if ((relax_info->is_relaxable_literal_section | |
9091 | || relax_info->is_relaxable_asm_section) | |
9092 | && relax_info->action_list.head) | |
9093 | { | |
9094 | /* Walk through the planned actions and build up a table | |
9095 | of move, copy and fill records. Use the move, copy and | |
9096 | fill records to perform the actions once. */ | |
9097 | ||
43cd72b9 BW |
9098 | int removed = 0; |
9099 | bfd_size_type final_size, copy_size, orig_insn_size; | |
9100 | bfd_byte *scratch = NULL; | |
9101 | bfd_byte *dup_contents = NULL; | |
a3ef2d63 | 9102 | bfd_size_type orig_size = sec->size; |
43cd72b9 BW |
9103 | bfd_vma orig_dot = 0; |
9104 | bfd_vma orig_dot_copied = 0; /* Byte copied already from | |
9105 | orig dot in physical memory. */ | |
9106 | bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */ | |
9107 | bfd_vma dup_dot = 0; | |
9108 | ||
9109 | text_action *action = relax_info->action_list.head; | |
9110 | ||
9111 | final_size = sec->size; | |
9112 | for (action = relax_info->action_list.head; action; | |
9113 | action = action->next) | |
9114 | { | |
9115 | final_size -= action->removed_bytes; | |
9116 | } | |
9117 | ||
9118 | scratch = (bfd_byte *) bfd_zmalloc (final_size); | |
9119 | dup_contents = (bfd_byte *) bfd_zmalloc (final_size); | |
9120 | ||
9121 | /* The dot is the current fill location. */ | |
9122 | #if DEBUG | |
9123 | print_action_list (stderr, &relax_info->action_list); | |
9124 | #endif | |
9125 | ||
9126 | for (action = relax_info->action_list.head; action; | |
9127 | action = action->next) | |
9128 | { | |
9129 | virtual_action = FALSE; | |
9130 | if (action->offset > orig_dot) | |
9131 | { | |
9132 | orig_dot += orig_dot_copied; | |
9133 | orig_dot_copied = 0; | |
9134 | orig_dot_vo = 0; | |
9135 | /* Out of the virtual world. */ | |
9136 | } | |
9137 | ||
9138 | if (action->offset > orig_dot) | |
9139 | { | |
9140 | copy_size = action->offset - orig_dot; | |
9141 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9142 | orig_dot += copy_size; | |
9143 | dup_dot += copy_size; | |
9144 | BFD_ASSERT (action->offset == orig_dot); | |
9145 | } | |
9146 | else if (action->offset < orig_dot) | |
9147 | { | |
9148 | if (action->action == ta_fill | |
9149 | && action->offset - action->removed_bytes == orig_dot) | |
9150 | { | |
9151 | /* This is OK because the fill only effects the dup_dot. */ | |
9152 | } | |
9153 | else if (action->action == ta_add_literal) | |
9154 | { | |
9155 | /* TBD. Might need to handle this. */ | |
9156 | } | |
9157 | } | |
9158 | if (action->offset == orig_dot) | |
9159 | { | |
9160 | if (action->virtual_offset > orig_dot_vo) | |
9161 | { | |
9162 | if (orig_dot_vo == 0) | |
9163 | { | |
9164 | /* Need to copy virtual_offset bytes. Probably four. */ | |
9165 | copy_size = action->virtual_offset - orig_dot_vo; | |
9166 | memmove (&dup_contents[dup_dot], | |
9167 | &contents[orig_dot], copy_size); | |
9168 | orig_dot_copied = copy_size; | |
9169 | dup_dot += copy_size; | |
9170 | } | |
9171 | virtual_action = TRUE; | |
9172 | } | |
9173 | else | |
9174 | BFD_ASSERT (action->virtual_offset <= orig_dot_vo); | |
9175 | } | |
9176 | switch (action->action) | |
9177 | { | |
9178 | case ta_remove_literal: | |
9179 | case ta_remove_insn: | |
9180 | BFD_ASSERT (action->removed_bytes >= 0); | |
9181 | orig_dot += action->removed_bytes; | |
9182 | break; | |
9183 | ||
9184 | case ta_narrow_insn: | |
9185 | orig_insn_size = 3; | |
9186 | copy_size = 2; | |
9187 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9188 | BFD_ASSERT (action->removed_bytes == 1); | |
64b607e6 | 9189 | rv = narrow_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9190 | BFD_ASSERT (rv); |
9191 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9192 | orig_dot += orig_insn_size; | |
9193 | dup_dot += copy_size; | |
9194 | break; | |
9195 | ||
9196 | case ta_fill: | |
9197 | if (action->removed_bytes >= 0) | |
9198 | orig_dot += action->removed_bytes; | |
9199 | else | |
9200 | { | |
9201 | /* Already zeroed in dup_contents. Just bump the | |
9202 | counters. */ | |
9203 | dup_dot += (-action->removed_bytes); | |
9204 | } | |
9205 | break; | |
9206 | ||
9207 | case ta_none: | |
9208 | BFD_ASSERT (action->removed_bytes == 0); | |
9209 | break; | |
9210 | ||
9211 | case ta_convert_longcall: | |
9212 | case ta_remove_longcall: | |
9213 | /* These will be removed or converted before we get here. */ | |
9214 | BFD_ASSERT (0); | |
9215 | break; | |
9216 | ||
9217 | case ta_widen_insn: | |
9218 | orig_insn_size = 2; | |
9219 | copy_size = 3; | |
9220 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9221 | BFD_ASSERT (action->removed_bytes == -1); | |
64b607e6 | 9222 | rv = widen_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9223 | BFD_ASSERT (rv); |
9224 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9225 | orig_dot += orig_insn_size; | |
9226 | dup_dot += copy_size; | |
9227 | break; | |
9228 | ||
9229 | case ta_add_literal: | |
9230 | orig_insn_size = 0; | |
9231 | copy_size = 4; | |
9232 | BFD_ASSERT (action->removed_bytes == -4); | |
9233 | /* TBD -- place the literal value here and insert | |
9234 | into the table. */ | |
9235 | memset (&dup_contents[dup_dot], 0, 4); | |
9236 | pin_internal_relocs (sec, internal_relocs); | |
9237 | pin_contents (sec, contents); | |
9238 | ||
9239 | if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents, | |
9240 | relax_info, &internal_relocs, &action->value)) | |
9241 | goto error_return; | |
9242 | ||
9243 | if (virtual_action) | |
9244 | orig_dot_vo += copy_size; | |
9245 | ||
9246 | orig_dot += orig_insn_size; | |
9247 | dup_dot += copy_size; | |
9248 | break; | |
9249 | ||
9250 | default: | |
9251 | /* Not implemented yet. */ | |
9252 | BFD_ASSERT (0); | |
9253 | break; | |
9254 | } | |
9255 | ||
43cd72b9 BW |
9256 | removed += action->removed_bytes; |
9257 | BFD_ASSERT (dup_dot <= final_size); | |
9258 | BFD_ASSERT (orig_dot <= orig_size); | |
9259 | } | |
9260 | ||
9261 | orig_dot += orig_dot_copied; | |
9262 | orig_dot_copied = 0; | |
9263 | ||
9264 | if (orig_dot != orig_size) | |
9265 | { | |
9266 | copy_size = orig_size - orig_dot; | |
9267 | BFD_ASSERT (orig_size > orig_dot); | |
9268 | BFD_ASSERT (dup_dot + copy_size == final_size); | |
9269 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9270 | orig_dot += copy_size; | |
9271 | dup_dot += copy_size; | |
9272 | } | |
9273 | BFD_ASSERT (orig_size == orig_dot); | |
9274 | BFD_ASSERT (final_size == dup_dot); | |
9275 | ||
9276 | /* Move the dup_contents back. */ | |
9277 | if (final_size > orig_size) | |
9278 | { | |
9279 | /* Contents need to be reallocated. Swap the dup_contents into | |
9280 | contents. */ | |
9281 | sec->contents = dup_contents; | |
9282 | free (contents); | |
9283 | contents = dup_contents; | |
9284 | pin_contents (sec, contents); | |
9285 | } | |
9286 | else | |
9287 | { | |
9288 | BFD_ASSERT (final_size <= orig_size); | |
9289 | memset (contents, 0, orig_size); | |
9290 | memcpy (contents, dup_contents, final_size); | |
9291 | free (dup_contents); | |
9292 | } | |
9293 | free (scratch); | |
9294 | pin_contents (sec, contents); | |
9295 | ||
a3ef2d63 BW |
9296 | if (sec->rawsize == 0) |
9297 | sec->rawsize = sec->size; | |
43cd72b9 BW |
9298 | sec->size = final_size; |
9299 | } | |
9300 | ||
9301 | error_return: | |
9302 | release_internal_relocs (sec, internal_relocs); | |
9303 | release_contents (sec, contents); | |
9304 | return ok; | |
9305 | } | |
9306 | ||
9307 | ||
9308 | static bfd_boolean | |
7fa3d080 | 9309 | translate_section_fixes (asection *sec) |
43cd72b9 BW |
9310 | { |
9311 | xtensa_relax_info *relax_info; | |
9312 | reloc_bfd_fix *r; | |
9313 | ||
9314 | relax_info = get_xtensa_relax_info (sec); | |
9315 | if (!relax_info) | |
9316 | return TRUE; | |
9317 | ||
9318 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
9319 | if (!translate_reloc_bfd_fix (r)) | |
9320 | return FALSE; | |
e0001a05 | 9321 | |
43cd72b9 BW |
9322 | return TRUE; |
9323 | } | |
e0001a05 | 9324 | |
e0001a05 | 9325 | |
43cd72b9 BW |
9326 | /* Translate a fix given the mapping in the relax info for the target |
9327 | section. If it has already been translated, no work is required. */ | |
e0001a05 | 9328 | |
43cd72b9 | 9329 | static bfd_boolean |
7fa3d080 | 9330 | translate_reloc_bfd_fix (reloc_bfd_fix *fix) |
43cd72b9 BW |
9331 | { |
9332 | reloc_bfd_fix new_fix; | |
9333 | asection *sec; | |
9334 | xtensa_relax_info *relax_info; | |
9335 | removed_literal *removed; | |
9336 | bfd_vma new_offset, target_offset; | |
e0001a05 | 9337 | |
43cd72b9 BW |
9338 | if (fix->translated) |
9339 | return TRUE; | |
e0001a05 | 9340 | |
43cd72b9 BW |
9341 | sec = fix->target_sec; |
9342 | target_offset = fix->target_offset; | |
e0001a05 | 9343 | |
43cd72b9 BW |
9344 | relax_info = get_xtensa_relax_info (sec); |
9345 | if (!relax_info) | |
9346 | { | |
9347 | fix->translated = TRUE; | |
9348 | return TRUE; | |
9349 | } | |
e0001a05 | 9350 | |
43cd72b9 | 9351 | new_fix = *fix; |
e0001a05 | 9352 | |
43cd72b9 BW |
9353 | /* The fix does not need to be translated if the section cannot change. */ |
9354 | if (!relax_info->is_relaxable_literal_section | |
9355 | && !relax_info->is_relaxable_asm_section) | |
9356 | { | |
9357 | fix->translated = TRUE; | |
9358 | return TRUE; | |
9359 | } | |
e0001a05 | 9360 | |
43cd72b9 BW |
9361 | /* If the literal has been moved and this relocation was on an |
9362 | opcode, then the relocation should move to the new literal | |
9363 | location. Otherwise, the relocation should move within the | |
9364 | section. */ | |
9365 | ||
9366 | removed = FALSE; | |
9367 | if (is_operand_relocation (fix->src_type)) | |
9368 | { | |
9369 | /* Check if the original relocation is against a literal being | |
9370 | removed. */ | |
9371 | removed = find_removed_literal (&relax_info->removed_list, | |
9372 | target_offset); | |
e0001a05 NC |
9373 | } |
9374 | ||
43cd72b9 | 9375 | if (removed) |
e0001a05 | 9376 | { |
43cd72b9 | 9377 | asection *new_sec; |
e0001a05 | 9378 | |
43cd72b9 BW |
9379 | /* The fact that there is still a relocation to this literal indicates |
9380 | that the literal is being coalesced, not simply removed. */ | |
9381 | BFD_ASSERT (removed->to.abfd != NULL); | |
e0001a05 | 9382 | |
43cd72b9 BW |
9383 | /* This was moved to some other address (possibly another section). */ |
9384 | new_sec = r_reloc_get_section (&removed->to); | |
9385 | if (new_sec != sec) | |
e0001a05 | 9386 | { |
43cd72b9 BW |
9387 | sec = new_sec; |
9388 | relax_info = get_xtensa_relax_info (sec); | |
9389 | if (!relax_info || | |
9390 | (!relax_info->is_relaxable_literal_section | |
9391 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 | 9392 | { |
43cd72b9 BW |
9393 | target_offset = removed->to.target_offset; |
9394 | new_fix.target_sec = new_sec; | |
9395 | new_fix.target_offset = target_offset; | |
9396 | new_fix.translated = TRUE; | |
9397 | *fix = new_fix; | |
9398 | return TRUE; | |
e0001a05 | 9399 | } |
e0001a05 | 9400 | } |
43cd72b9 BW |
9401 | target_offset = removed->to.target_offset; |
9402 | new_fix.target_sec = new_sec; | |
e0001a05 | 9403 | } |
43cd72b9 BW |
9404 | |
9405 | /* The target address may have been moved within its section. */ | |
9406 | new_offset = offset_with_removed_text (&relax_info->action_list, | |
9407 | target_offset); | |
9408 | ||
9409 | new_fix.target_offset = new_offset; | |
9410 | new_fix.target_offset = new_offset; | |
9411 | new_fix.translated = TRUE; | |
9412 | *fix = new_fix; | |
9413 | return TRUE; | |
e0001a05 NC |
9414 | } |
9415 | ||
9416 | ||
9417 | /* Fix up a relocation to take account of removed literals. */ | |
9418 | ||
9b7f5d20 BW |
9419 | static asection * |
9420 | translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec) | |
e0001a05 | 9421 | { |
e0001a05 NC |
9422 | xtensa_relax_info *relax_info; |
9423 | removed_literal *removed; | |
9b7f5d20 BW |
9424 | bfd_vma target_offset, base_offset; |
9425 | text_action *act; | |
e0001a05 NC |
9426 | |
9427 | *new_rel = *orig_rel; | |
9428 | ||
9429 | if (!r_reloc_is_defined (orig_rel)) | |
9b7f5d20 | 9430 | return sec ; |
e0001a05 NC |
9431 | |
9432 | relax_info = get_xtensa_relax_info (sec); | |
9b7f5d20 BW |
9433 | BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section |
9434 | || relax_info->is_relaxable_asm_section)); | |
e0001a05 | 9435 | |
43cd72b9 BW |
9436 | target_offset = orig_rel->target_offset; |
9437 | ||
9438 | removed = FALSE; | |
9439 | if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info))) | |
9440 | { | |
9441 | /* Check if the original relocation is against a literal being | |
9442 | removed. */ | |
9443 | removed = find_removed_literal (&relax_info->removed_list, | |
9444 | target_offset); | |
9445 | } | |
9446 | if (removed && removed->to.abfd) | |
e0001a05 NC |
9447 | { |
9448 | asection *new_sec; | |
9449 | ||
9450 | /* The fact that there is still a relocation to this literal indicates | |
9451 | that the literal is being coalesced, not simply removed. */ | |
9452 | BFD_ASSERT (removed->to.abfd != NULL); | |
9453 | ||
43cd72b9 BW |
9454 | /* This was moved to some other address |
9455 | (possibly in another section). */ | |
e0001a05 NC |
9456 | *new_rel = removed->to; |
9457 | new_sec = r_reloc_get_section (new_rel); | |
43cd72b9 | 9458 | if (new_sec != sec) |
e0001a05 NC |
9459 | { |
9460 | sec = new_sec; | |
9461 | relax_info = get_xtensa_relax_info (sec); | |
43cd72b9 BW |
9462 | if (!relax_info |
9463 | || (!relax_info->is_relaxable_literal_section | |
9464 | && !relax_info->is_relaxable_asm_section)) | |
9b7f5d20 | 9465 | return sec; |
e0001a05 | 9466 | } |
43cd72b9 | 9467 | target_offset = new_rel->target_offset; |
e0001a05 NC |
9468 | } |
9469 | ||
9b7f5d20 BW |
9470 | /* Find the base offset of the reloc symbol, excluding any addend from the |
9471 | reloc or from the section contents (for a partial_inplace reloc). Then | |
9472 | find the adjusted values of the offsets due to relaxation. The base | |
9473 | offset is needed to determine the change to the reloc's addend; the reloc | |
9474 | addend should not be adjusted due to relaxations located before the base | |
9475 | offset. */ | |
9476 | ||
9477 | base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend; | |
9478 | act = relax_info->action_list.head; | |
9479 | if (base_offset <= target_offset) | |
9480 | { | |
9481 | int base_removed = removed_by_actions (&act, base_offset, FALSE); | |
9482 | int addend_removed = removed_by_actions (&act, target_offset, FALSE); | |
9483 | new_rel->target_offset = target_offset - base_removed - addend_removed; | |
9484 | new_rel->rela.r_addend -= addend_removed; | |
9485 | } | |
9486 | else | |
9487 | { | |
9488 | /* Handle a negative addend. The base offset comes first. */ | |
9489 | int tgt_removed = removed_by_actions (&act, target_offset, FALSE); | |
9490 | int addend_removed = removed_by_actions (&act, base_offset, FALSE); | |
9491 | new_rel->target_offset = target_offset - tgt_removed; | |
9492 | new_rel->rela.r_addend += addend_removed; | |
9493 | } | |
e0001a05 | 9494 | |
9b7f5d20 | 9495 | return sec; |
e0001a05 NC |
9496 | } |
9497 | ||
9498 | ||
9499 | /* For dynamic links, there may be a dynamic relocation for each | |
9500 | literal. The number of dynamic relocations must be computed in | |
9501 | size_dynamic_sections, which occurs before relaxation. When a | |
9502 | literal is removed, this function checks if there is a corresponding | |
9503 | dynamic relocation and shrinks the size of the appropriate dynamic | |
9504 | relocation section accordingly. At this point, the contents of the | |
9505 | dynamic relocation sections have not yet been filled in, so there's | |
9506 | nothing else that needs to be done. */ | |
9507 | ||
9508 | static void | |
7fa3d080 BW |
9509 | shrink_dynamic_reloc_sections (struct bfd_link_info *info, |
9510 | bfd *abfd, | |
9511 | asection *input_section, | |
9512 | Elf_Internal_Rela *rel) | |
e0001a05 | 9513 | { |
f0e6fdb2 | 9514 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
9515 | Elf_Internal_Shdr *symtab_hdr; |
9516 | struct elf_link_hash_entry **sym_hashes; | |
9517 | unsigned long r_symndx; | |
9518 | int r_type; | |
9519 | struct elf_link_hash_entry *h; | |
9520 | bfd_boolean dynamic_symbol; | |
9521 | ||
f0e6fdb2 | 9522 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
9523 | if (htab == NULL) |
9524 | return; | |
9525 | ||
e0001a05 NC |
9526 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
9527 | sym_hashes = elf_sym_hashes (abfd); | |
9528 | ||
9529 | r_type = ELF32_R_TYPE (rel->r_info); | |
9530 | r_symndx = ELF32_R_SYM (rel->r_info); | |
9531 | ||
9532 | if (r_symndx < symtab_hdr->sh_info) | |
9533 | h = NULL; | |
9534 | else | |
9535 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9536 | ||
4608f3d9 | 9537 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 NC |
9538 | |
9539 | if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
9540 | && (input_section->flags & SEC_ALLOC) != 0 | |
9541 | && (dynamic_symbol || info->shared)) | |
9542 | { | |
e0001a05 NC |
9543 | asection *srel; |
9544 | bfd_boolean is_plt = FALSE; | |
9545 | ||
e0001a05 NC |
9546 | if (dynamic_symbol && r_type == R_XTENSA_PLT) |
9547 | { | |
f0e6fdb2 | 9548 | srel = htab->srelplt; |
e0001a05 NC |
9549 | is_plt = TRUE; |
9550 | } | |
9551 | else | |
f0e6fdb2 | 9552 | srel = htab->srelgot; |
e0001a05 NC |
9553 | |
9554 | /* Reduce size of the .rela.* section by one reloc. */ | |
e0001a05 | 9555 | BFD_ASSERT (srel != NULL); |
eea6121a AM |
9556 | BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela)); |
9557 | srel->size -= sizeof (Elf32_External_Rela); | |
e0001a05 NC |
9558 | |
9559 | if (is_plt) | |
9560 | { | |
9561 | asection *splt, *sgotplt, *srelgot; | |
9562 | int reloc_index, chunk; | |
9563 | ||
9564 | /* Find the PLT reloc index of the entry being removed. This | |
9565 | is computed from the size of ".rela.plt". It is needed to | |
9566 | figure out which PLT chunk to resize. Usually "last index | |
9567 | = size - 1" since the index starts at zero, but in this | |
9568 | context, the size has just been decremented so there's no | |
9569 | need to subtract one. */ | |
eea6121a | 9570 | reloc_index = srel->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
9571 | |
9572 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
9573 | splt = elf_xtensa_get_plt_section (info, chunk); |
9574 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
9575 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
9576 | ||
9577 | /* Check if an entire PLT chunk has just been eliminated. */ | |
9578 | if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0) | |
9579 | { | |
9580 | /* The two magic GOT entries for that chunk can go away. */ | |
f0e6fdb2 | 9581 | srelgot = htab->srelgot; |
e0001a05 NC |
9582 | BFD_ASSERT (srelgot != NULL); |
9583 | srelgot->reloc_count -= 2; | |
eea6121a AM |
9584 | srelgot->size -= 2 * sizeof (Elf32_External_Rela); |
9585 | sgotplt->size -= 8; | |
e0001a05 NC |
9586 | |
9587 | /* There should be only one entry left (and it will be | |
9588 | removed below). */ | |
eea6121a AM |
9589 | BFD_ASSERT (sgotplt->size == 4); |
9590 | BFD_ASSERT (splt->size == PLT_ENTRY_SIZE); | |
e0001a05 NC |
9591 | } |
9592 | ||
eea6121a AM |
9593 | BFD_ASSERT (sgotplt->size >= 4); |
9594 | BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE); | |
e0001a05 | 9595 | |
eea6121a AM |
9596 | sgotplt->size -= 4; |
9597 | splt->size -= PLT_ENTRY_SIZE; | |
e0001a05 NC |
9598 | } |
9599 | } | |
9600 | } | |
9601 | ||
9602 | ||
43cd72b9 BW |
9603 | /* Take an r_rel and move it to another section. This usually |
9604 | requires extending the interal_relocation array and pinning it. If | |
9605 | the original r_rel is from the same BFD, we can complete this here. | |
9606 | Otherwise, we add a fix record to let the final link fix the | |
9607 | appropriate address. Contents and internal relocations for the | |
9608 | section must be pinned after calling this routine. */ | |
9609 | ||
9610 | static bfd_boolean | |
7fa3d080 BW |
9611 | move_literal (bfd *abfd, |
9612 | struct bfd_link_info *link_info, | |
9613 | asection *sec, | |
9614 | bfd_vma offset, | |
9615 | bfd_byte *contents, | |
9616 | xtensa_relax_info *relax_info, | |
9617 | Elf_Internal_Rela **internal_relocs_p, | |
9618 | const literal_value *lit) | |
43cd72b9 BW |
9619 | { |
9620 | Elf_Internal_Rela *new_relocs = NULL; | |
9621 | size_t new_relocs_count = 0; | |
9622 | Elf_Internal_Rela this_rela; | |
9623 | const r_reloc *r_rel; | |
9624 | ||
9625 | r_rel = &lit->r_rel; | |
9626 | BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p); | |
9627 | ||
9628 | if (r_reloc_is_const (r_rel)) | |
9629 | bfd_put_32 (abfd, lit->value, contents + offset); | |
9630 | else | |
9631 | { | |
9632 | int r_type; | |
9633 | unsigned i; | |
9634 | asection *target_sec; | |
9635 | reloc_bfd_fix *fix; | |
9636 | unsigned insert_at; | |
9637 | ||
9638 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
9639 | target_sec = r_reloc_get_section (r_rel); | |
9640 | ||
9641 | /* This is the difficult case. We have to create a fix up. */ | |
9642 | this_rela.r_offset = offset; | |
9643 | this_rela.r_info = ELF32_R_INFO (0, r_type); | |
9644 | this_rela.r_addend = | |
9645 | r_rel->target_offset - r_reloc_get_target_offset (r_rel); | |
9646 | bfd_put_32 (abfd, lit->value, contents + offset); | |
9647 | ||
9648 | /* Currently, we cannot move relocations during a relocatable link. */ | |
9649 | BFD_ASSERT (!link_info->relocatable); | |
0f5f1638 | 9650 | fix = reloc_bfd_fix_init (sec, offset, r_type, |
43cd72b9 BW |
9651 | r_reloc_get_section (r_rel), |
9652 | r_rel->target_offset + r_rel->virtual_offset, | |
9653 | FALSE); | |
9654 | /* We also need to mark that relocations are needed here. */ | |
9655 | sec->flags |= SEC_RELOC; | |
9656 | ||
9657 | translate_reloc_bfd_fix (fix); | |
9658 | /* This fix has not yet been translated. */ | |
9659 | add_fix (sec, fix); | |
9660 | ||
9661 | /* Add the relocation. If we have already allocated our own | |
9662 | space for the relocations and we have room for more, then use | |
9663 | it. Otherwise, allocate new space and move the literals. */ | |
9664 | insert_at = sec->reloc_count; | |
9665 | for (i = 0; i < sec->reloc_count; ++i) | |
9666 | { | |
9667 | if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset) | |
9668 | { | |
9669 | insert_at = i; | |
9670 | break; | |
9671 | } | |
9672 | } | |
9673 | ||
9674 | if (*internal_relocs_p != relax_info->allocated_relocs | |
9675 | || sec->reloc_count + 1 > relax_info->allocated_relocs_count) | |
9676 | { | |
9677 | BFD_ASSERT (relax_info->allocated_relocs == NULL | |
9678 | || sec->reloc_count == relax_info->relocs_count); | |
9679 | ||
9680 | if (relax_info->allocated_relocs_count == 0) | |
9681 | new_relocs_count = (sec->reloc_count + 2) * 2; | |
9682 | else | |
9683 | new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2; | |
9684 | ||
9685 | new_relocs = (Elf_Internal_Rela *) | |
9686 | bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count)); | |
9687 | if (!new_relocs) | |
9688 | return FALSE; | |
9689 | ||
9690 | /* We could handle this more quickly by finding the split point. */ | |
9691 | if (insert_at != 0) | |
9692 | memcpy (new_relocs, *internal_relocs_p, | |
9693 | insert_at * sizeof (Elf_Internal_Rela)); | |
9694 | ||
9695 | new_relocs[insert_at] = this_rela; | |
9696 | ||
9697 | if (insert_at != sec->reloc_count) | |
9698 | memcpy (new_relocs + insert_at + 1, | |
9699 | (*internal_relocs_p) + insert_at, | |
9700 | (sec->reloc_count - insert_at) | |
9701 | * sizeof (Elf_Internal_Rela)); | |
9702 | ||
9703 | if (*internal_relocs_p != relax_info->allocated_relocs) | |
9704 | { | |
9705 | /* The first time we re-allocate, we can only free the | |
9706 | old relocs if they were allocated with bfd_malloc. | |
9707 | This is not true when keep_memory is in effect. */ | |
9708 | if (!link_info->keep_memory) | |
9709 | free (*internal_relocs_p); | |
9710 | } | |
9711 | else | |
9712 | free (*internal_relocs_p); | |
9713 | relax_info->allocated_relocs = new_relocs; | |
9714 | relax_info->allocated_relocs_count = new_relocs_count; | |
9715 | elf_section_data (sec)->relocs = new_relocs; | |
9716 | sec->reloc_count++; | |
9717 | relax_info->relocs_count = sec->reloc_count; | |
9718 | *internal_relocs_p = new_relocs; | |
9719 | } | |
9720 | else | |
9721 | { | |
9722 | if (insert_at != sec->reloc_count) | |
9723 | { | |
9724 | unsigned idx; | |
9725 | for (idx = sec->reloc_count; idx > insert_at; idx--) | |
9726 | (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1]; | |
9727 | } | |
9728 | (*internal_relocs_p)[insert_at] = this_rela; | |
9729 | sec->reloc_count++; | |
9730 | if (relax_info->allocated_relocs) | |
9731 | relax_info->relocs_count = sec->reloc_count; | |
9732 | } | |
9733 | } | |
9734 | return TRUE; | |
9735 | } | |
9736 | ||
9737 | ||
e0001a05 NC |
9738 | /* This is similar to relax_section except that when a target is moved, |
9739 | we shift addresses up. We also need to modify the size. This | |
9740 | algorithm does NOT allow for relocations into the middle of the | |
9741 | property sections. */ | |
9742 | ||
43cd72b9 | 9743 | static bfd_boolean |
7fa3d080 BW |
9744 | relax_property_section (bfd *abfd, |
9745 | asection *sec, | |
9746 | struct bfd_link_info *link_info) | |
e0001a05 NC |
9747 | { |
9748 | Elf_Internal_Rela *internal_relocs; | |
9749 | bfd_byte *contents; | |
1d25768e | 9750 | unsigned i; |
e0001a05 | 9751 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
9752 | bfd_boolean is_full_prop_section; |
9753 | size_t last_zfill_target_offset = 0; | |
9754 | asection *last_zfill_target_sec = NULL; | |
9755 | bfd_size_type sec_size; | |
1d25768e | 9756 | bfd_size_type entry_size; |
e0001a05 | 9757 | |
43cd72b9 | 9758 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
9759 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
9760 | link_info->keep_memory); | |
9761 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 9762 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
9763 | { |
9764 | ok = FALSE; | |
9765 | goto error_return; | |
9766 | } | |
9767 | ||
1d25768e BW |
9768 | is_full_prop_section = xtensa_is_proptable_section (sec); |
9769 | if (is_full_prop_section) | |
9770 | entry_size = 12; | |
9771 | else | |
9772 | entry_size = 8; | |
43cd72b9 BW |
9773 | |
9774 | if (internal_relocs) | |
e0001a05 | 9775 | { |
43cd72b9 | 9776 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
9777 | { |
9778 | Elf_Internal_Rela *irel; | |
9779 | xtensa_relax_info *target_relax_info; | |
e0001a05 NC |
9780 | unsigned r_type; |
9781 | asection *target_sec; | |
43cd72b9 BW |
9782 | literal_value val; |
9783 | bfd_byte *size_p, *flags_p; | |
e0001a05 NC |
9784 | |
9785 | /* Locally change the source address. | |
9786 | Translate the target to the new target address. | |
9787 | If it points to this section and has been removed, MOVE IT. | |
9788 | Also, don't forget to modify the associated SIZE at | |
9789 | (offset + 4). */ | |
9790 | ||
9791 | irel = &internal_relocs[i]; | |
9792 | r_type = ELF32_R_TYPE (irel->r_info); | |
9793 | if (r_type == R_XTENSA_NONE) | |
9794 | continue; | |
9795 | ||
43cd72b9 BW |
9796 | /* Find the literal value. */ |
9797 | r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size); | |
9798 | size_p = &contents[irel->r_offset + 4]; | |
9799 | flags_p = NULL; | |
9800 | if (is_full_prop_section) | |
1d25768e BW |
9801 | flags_p = &contents[irel->r_offset + 8]; |
9802 | BFD_ASSERT (irel->r_offset + entry_size <= sec_size); | |
e0001a05 | 9803 | |
43cd72b9 | 9804 | target_sec = r_reloc_get_section (&val.r_rel); |
e0001a05 NC |
9805 | target_relax_info = get_xtensa_relax_info (target_sec); |
9806 | ||
9807 | if (target_relax_info | |
43cd72b9 BW |
9808 | && (target_relax_info->is_relaxable_literal_section |
9809 | || target_relax_info->is_relaxable_asm_section )) | |
e0001a05 NC |
9810 | { |
9811 | /* Translate the relocation's destination. */ | |
03669f1c BW |
9812 | bfd_vma old_offset = val.r_rel.target_offset; |
9813 | bfd_vma new_offset; | |
e0001a05 | 9814 | long old_size, new_size; |
03669f1c BW |
9815 | text_action *act = target_relax_info->action_list.head; |
9816 | new_offset = old_offset - | |
9817 | removed_by_actions (&act, old_offset, FALSE); | |
e0001a05 NC |
9818 | |
9819 | /* Assert that we are not out of bounds. */ | |
43cd72b9 | 9820 | old_size = bfd_get_32 (abfd, size_p); |
03669f1c | 9821 | new_size = old_size; |
43cd72b9 BW |
9822 | |
9823 | if (old_size == 0) | |
9824 | { | |
9825 | /* Only the first zero-sized unreachable entry is | |
9826 | allowed to expand. In this case the new offset | |
9827 | should be the offset before the fill and the new | |
9828 | size is the expansion size. For other zero-sized | |
9829 | entries the resulting size should be zero with an | |
9830 | offset before or after the fill address depending | |
9831 | on whether the expanding unreachable entry | |
9832 | preceeds it. */ | |
03669f1c BW |
9833 | if (last_zfill_target_sec == 0 |
9834 | || last_zfill_target_sec != target_sec | |
9835 | || last_zfill_target_offset != old_offset) | |
43cd72b9 | 9836 | { |
03669f1c BW |
9837 | bfd_vma new_end_offset = new_offset; |
9838 | ||
9839 | /* Recompute the new_offset, but this time don't | |
9840 | include any fill inserted by relaxation. */ | |
9841 | act = target_relax_info->action_list.head; | |
9842 | new_offset = old_offset - | |
9843 | removed_by_actions (&act, old_offset, TRUE); | |
43cd72b9 BW |
9844 | |
9845 | /* If it is not unreachable and we have not yet | |
9846 | seen an unreachable at this address, place it | |
9847 | before the fill address. */ | |
03669f1c BW |
9848 | if (flags_p && (bfd_get_32 (abfd, flags_p) |
9849 | & XTENSA_PROP_UNREACHABLE) != 0) | |
43cd72b9 | 9850 | { |
03669f1c BW |
9851 | new_size = new_end_offset - new_offset; |
9852 | ||
43cd72b9 | 9853 | last_zfill_target_sec = target_sec; |
03669f1c | 9854 | last_zfill_target_offset = old_offset; |
43cd72b9 BW |
9855 | } |
9856 | } | |
9857 | } | |
9858 | else | |
03669f1c BW |
9859 | new_size -= |
9860 | removed_by_actions (&act, old_offset + old_size, TRUE); | |
43cd72b9 | 9861 | |
e0001a05 NC |
9862 | if (new_size != old_size) |
9863 | { | |
9864 | bfd_put_32 (abfd, new_size, size_p); | |
9865 | pin_contents (sec, contents); | |
9866 | } | |
43cd72b9 | 9867 | |
03669f1c | 9868 | if (new_offset != old_offset) |
e0001a05 | 9869 | { |
03669f1c | 9870 | bfd_vma diff = new_offset - old_offset; |
e0001a05 NC |
9871 | irel->r_addend += diff; |
9872 | pin_internal_relocs (sec, internal_relocs); | |
9873 | } | |
9874 | } | |
9875 | } | |
9876 | } | |
9877 | ||
9878 | /* Combine adjacent property table entries. This is also done in | |
9879 | finish_dynamic_sections() but at that point it's too late to | |
9880 | reclaim the space in the output section, so we do this twice. */ | |
9881 | ||
43cd72b9 | 9882 | if (internal_relocs && (!link_info->relocatable |
1d25768e | 9883 | || xtensa_is_littable_section (sec))) |
e0001a05 NC |
9884 | { |
9885 | Elf_Internal_Rela *last_irel = NULL; | |
1d25768e | 9886 | Elf_Internal_Rela *irel, *next_rel, *rel_end; |
e0001a05 | 9887 | int removed_bytes = 0; |
1d25768e | 9888 | bfd_vma offset; |
43cd72b9 BW |
9889 | flagword predef_flags; |
9890 | ||
43cd72b9 | 9891 | predef_flags = xtensa_get_property_predef_flags (sec); |
e0001a05 | 9892 | |
1d25768e | 9893 | /* Walk over memory and relocations at the same time. |
e0001a05 NC |
9894 | This REQUIRES that the internal_relocs be sorted by offset. */ |
9895 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
9896 | internal_reloc_compare); | |
e0001a05 NC |
9897 | |
9898 | pin_internal_relocs (sec, internal_relocs); | |
9899 | pin_contents (sec, contents); | |
9900 | ||
1d25768e BW |
9901 | next_rel = internal_relocs; |
9902 | rel_end = internal_relocs + sec->reloc_count; | |
9903 | ||
a3ef2d63 | 9904 | BFD_ASSERT (sec->size % entry_size == 0); |
e0001a05 | 9905 | |
a3ef2d63 | 9906 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 | 9907 | { |
1d25768e | 9908 | Elf_Internal_Rela *offset_rel, *extra_rel; |
e0001a05 | 9909 | bfd_vma bytes_to_remove, size, actual_offset; |
1d25768e | 9910 | bfd_boolean remove_this_rel; |
43cd72b9 | 9911 | flagword flags; |
e0001a05 | 9912 | |
1d25768e BW |
9913 | /* Find the first relocation for the entry at the current offset. |
9914 | Adjust the offsets of any extra relocations for the previous | |
9915 | entry. */ | |
9916 | offset_rel = NULL; | |
9917 | if (next_rel) | |
9918 | { | |
9919 | for (irel = next_rel; irel < rel_end; irel++) | |
9920 | { | |
9921 | if ((irel->r_offset == offset | |
9922 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) | |
9923 | || irel->r_offset > offset) | |
9924 | { | |
9925 | offset_rel = irel; | |
9926 | break; | |
9927 | } | |
9928 | irel->r_offset -= removed_bytes; | |
1d25768e BW |
9929 | } |
9930 | } | |
e0001a05 | 9931 | |
1d25768e BW |
9932 | /* Find the next relocation (if there are any left). */ |
9933 | extra_rel = NULL; | |
9934 | if (offset_rel) | |
e0001a05 | 9935 | { |
1d25768e | 9936 | for (irel = offset_rel + 1; irel < rel_end; irel++) |
e0001a05 | 9937 | { |
1d25768e BW |
9938 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) |
9939 | { | |
9940 | extra_rel = irel; | |
9941 | break; | |
9942 | } | |
e0001a05 | 9943 | } |
e0001a05 NC |
9944 | } |
9945 | ||
1d25768e BW |
9946 | /* Check if there are relocations on the current entry. There |
9947 | should usually be a relocation on the offset field. If there | |
9948 | are relocations on the size or flags, then we can't optimize | |
9949 | this entry. Also, find the next relocation to examine on the | |
9950 | next iteration. */ | |
9951 | if (offset_rel) | |
e0001a05 | 9952 | { |
1d25768e | 9953 | if (offset_rel->r_offset >= offset + entry_size) |
e0001a05 | 9954 | { |
1d25768e BW |
9955 | next_rel = offset_rel; |
9956 | /* There are no relocations on the current entry, but we | |
9957 | might still be able to remove it if the size is zero. */ | |
9958 | offset_rel = NULL; | |
9959 | } | |
9960 | else if (offset_rel->r_offset > offset | |
9961 | || (extra_rel | |
9962 | && extra_rel->r_offset < offset + entry_size)) | |
9963 | { | |
9964 | /* There is a relocation on the size or flags, so we can't | |
9965 | do anything with this entry. Continue with the next. */ | |
9966 | next_rel = offset_rel; | |
9967 | continue; | |
9968 | } | |
9969 | else | |
9970 | { | |
9971 | BFD_ASSERT (offset_rel->r_offset == offset); | |
9972 | offset_rel->r_offset -= removed_bytes; | |
9973 | next_rel = offset_rel + 1; | |
e0001a05 | 9974 | } |
e0001a05 | 9975 | } |
1d25768e BW |
9976 | else |
9977 | next_rel = NULL; | |
e0001a05 | 9978 | |
1d25768e | 9979 | remove_this_rel = FALSE; |
e0001a05 NC |
9980 | bytes_to_remove = 0; |
9981 | actual_offset = offset - removed_bytes; | |
9982 | size = bfd_get_32 (abfd, &contents[actual_offset + 4]); | |
9983 | ||
43cd72b9 BW |
9984 | if (is_full_prop_section) |
9985 | flags = bfd_get_32 (abfd, &contents[actual_offset + 8]); | |
9986 | else | |
9987 | flags = predef_flags; | |
9988 | ||
1d25768e BW |
9989 | if (size == 0 |
9990 | && (flags & XTENSA_PROP_ALIGN) == 0 | |
9991 | && (flags & XTENSA_PROP_UNREACHABLE) == 0) | |
e0001a05 | 9992 | { |
43cd72b9 BW |
9993 | /* Always remove entries with zero size and no alignment. */ |
9994 | bytes_to_remove = entry_size; | |
1d25768e BW |
9995 | if (offset_rel) |
9996 | remove_this_rel = TRUE; | |
e0001a05 | 9997 | } |
1d25768e BW |
9998 | else if (offset_rel |
9999 | && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32) | |
e0001a05 | 10000 | { |
1d25768e | 10001 | if (last_irel) |
e0001a05 | 10002 | { |
1d25768e BW |
10003 | flagword old_flags; |
10004 | bfd_vma old_size = | |
10005 | bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]); | |
10006 | bfd_vma old_address = | |
10007 | (last_irel->r_addend | |
10008 | + bfd_get_32 (abfd, &contents[last_irel->r_offset])); | |
10009 | bfd_vma new_address = | |
10010 | (offset_rel->r_addend | |
10011 | + bfd_get_32 (abfd, &contents[actual_offset])); | |
10012 | if (is_full_prop_section) | |
10013 | old_flags = bfd_get_32 | |
10014 | (abfd, &contents[last_irel->r_offset + 8]); | |
10015 | else | |
10016 | old_flags = predef_flags; | |
10017 | ||
10018 | if ((ELF32_R_SYM (offset_rel->r_info) | |
10019 | == ELF32_R_SYM (last_irel->r_info)) | |
10020 | && old_address + old_size == new_address | |
10021 | && old_flags == flags | |
10022 | && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0 | |
10023 | && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0) | |
e0001a05 | 10024 | { |
1d25768e BW |
10025 | /* Fix the old size. */ |
10026 | bfd_put_32 (abfd, old_size + size, | |
10027 | &contents[last_irel->r_offset + 4]); | |
10028 | bytes_to_remove = entry_size; | |
10029 | remove_this_rel = TRUE; | |
e0001a05 NC |
10030 | } |
10031 | else | |
1d25768e | 10032 | last_irel = offset_rel; |
e0001a05 | 10033 | } |
1d25768e BW |
10034 | else |
10035 | last_irel = offset_rel; | |
e0001a05 NC |
10036 | } |
10037 | ||
1d25768e | 10038 | if (remove_this_rel) |
e0001a05 | 10039 | { |
1d25768e | 10040 | offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); |
3df502ae | 10041 | offset_rel->r_offset = 0; |
e0001a05 NC |
10042 | } |
10043 | ||
10044 | if (bytes_to_remove != 0) | |
10045 | { | |
10046 | removed_bytes += bytes_to_remove; | |
a3ef2d63 | 10047 | if (offset + bytes_to_remove < sec->size) |
e0001a05 | 10048 | memmove (&contents[actual_offset], |
43cd72b9 | 10049 | &contents[actual_offset + bytes_to_remove], |
a3ef2d63 | 10050 | sec->size - offset - bytes_to_remove); |
e0001a05 NC |
10051 | } |
10052 | } | |
10053 | ||
43cd72b9 | 10054 | if (removed_bytes) |
e0001a05 | 10055 | { |
1d25768e BW |
10056 | /* Fix up any extra relocations on the last entry. */ |
10057 | for (irel = next_rel; irel < rel_end; irel++) | |
10058 | irel->r_offset -= removed_bytes; | |
10059 | ||
e0001a05 | 10060 | /* Clear the removed bytes. */ |
a3ef2d63 | 10061 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 | 10062 | |
a3ef2d63 BW |
10063 | if (sec->rawsize == 0) |
10064 | sec->rawsize = sec->size; | |
10065 | sec->size -= removed_bytes; | |
e901de89 BW |
10066 | |
10067 | if (xtensa_is_littable_section (sec)) | |
10068 | { | |
f0e6fdb2 BW |
10069 | asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc; |
10070 | if (sgotloc) | |
10071 | sgotloc->size -= removed_bytes; | |
e901de89 | 10072 | } |
e0001a05 NC |
10073 | } |
10074 | } | |
e901de89 | 10075 | |
e0001a05 NC |
10076 | error_return: |
10077 | release_internal_relocs (sec, internal_relocs); | |
10078 | release_contents (sec, contents); | |
10079 | return ok; | |
10080 | } | |
10081 | ||
10082 | \f | |
10083 | /* Third relaxation pass. */ | |
10084 | ||
10085 | /* Change symbol values to account for removed literals. */ | |
10086 | ||
43cd72b9 | 10087 | bfd_boolean |
7fa3d080 | 10088 | relax_section_symbols (bfd *abfd, asection *sec) |
e0001a05 NC |
10089 | { |
10090 | xtensa_relax_info *relax_info; | |
10091 | unsigned int sec_shndx; | |
10092 | Elf_Internal_Shdr *symtab_hdr; | |
10093 | Elf_Internal_Sym *isymbuf; | |
10094 | unsigned i, num_syms, num_locals; | |
10095 | ||
10096 | relax_info = get_xtensa_relax_info (sec); | |
10097 | BFD_ASSERT (relax_info); | |
10098 | ||
43cd72b9 BW |
10099 | if (!relax_info->is_relaxable_literal_section |
10100 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
10101 | return TRUE; |
10102 | ||
10103 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
10104 | ||
10105 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10106 | isymbuf = retrieve_local_syms (abfd); | |
10107 | ||
10108 | num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
10109 | num_locals = symtab_hdr->sh_info; | |
10110 | ||
10111 | /* Adjust the local symbols defined in this section. */ | |
10112 | for (i = 0; i < num_locals; i++) | |
10113 | { | |
10114 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
10115 | ||
10116 | if (isym->st_shndx == sec_shndx) | |
10117 | { | |
03669f1c BW |
10118 | text_action *act = relax_info->action_list.head; |
10119 | bfd_vma orig_addr = isym->st_value; | |
43cd72b9 | 10120 | |
03669f1c | 10121 | isym->st_value -= removed_by_actions (&act, orig_addr, FALSE); |
43cd72b9 | 10122 | |
03669f1c BW |
10123 | if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC) |
10124 | isym->st_size -= | |
10125 | removed_by_actions (&act, orig_addr + isym->st_size, FALSE); | |
e0001a05 NC |
10126 | } |
10127 | } | |
10128 | ||
10129 | /* Now adjust the global symbols defined in this section. */ | |
10130 | for (i = 0; i < (num_syms - num_locals); i++) | |
10131 | { | |
10132 | struct elf_link_hash_entry *sym_hash; | |
10133 | ||
10134 | sym_hash = elf_sym_hashes (abfd)[i]; | |
10135 | ||
10136 | if (sym_hash->root.type == bfd_link_hash_warning) | |
10137 | sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link; | |
10138 | ||
10139 | if ((sym_hash->root.type == bfd_link_hash_defined | |
10140 | || sym_hash->root.type == bfd_link_hash_defweak) | |
10141 | && sym_hash->root.u.def.section == sec) | |
10142 | { | |
03669f1c BW |
10143 | text_action *act = relax_info->action_list.head; |
10144 | bfd_vma orig_addr = sym_hash->root.u.def.value; | |
43cd72b9 | 10145 | |
03669f1c BW |
10146 | sym_hash->root.u.def.value -= |
10147 | removed_by_actions (&act, orig_addr, FALSE); | |
43cd72b9 | 10148 | |
03669f1c BW |
10149 | if (sym_hash->type == STT_FUNC) |
10150 | sym_hash->size -= | |
10151 | removed_by_actions (&act, orig_addr + sym_hash->size, FALSE); | |
e0001a05 NC |
10152 | } |
10153 | } | |
10154 | ||
10155 | return TRUE; | |
10156 | } | |
10157 | ||
10158 | \f | |
10159 | /* "Fix" handling functions, called while performing relocations. */ | |
10160 | ||
43cd72b9 | 10161 | static bfd_boolean |
7fa3d080 BW |
10162 | do_fix_for_relocatable_link (Elf_Internal_Rela *rel, |
10163 | bfd *input_bfd, | |
10164 | asection *input_section, | |
10165 | bfd_byte *contents) | |
e0001a05 NC |
10166 | { |
10167 | r_reloc r_rel; | |
10168 | asection *sec, *old_sec; | |
10169 | bfd_vma old_offset; | |
10170 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 NC |
10171 | reloc_bfd_fix *fix; |
10172 | ||
10173 | if (r_type == R_XTENSA_NONE) | |
43cd72b9 | 10174 | return TRUE; |
e0001a05 | 10175 | |
43cd72b9 BW |
10176 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10177 | if (!fix) | |
10178 | return TRUE; | |
e0001a05 | 10179 | |
43cd72b9 BW |
10180 | r_reloc_init (&r_rel, input_bfd, rel, contents, |
10181 | bfd_get_section_limit (input_bfd, input_section)); | |
e0001a05 | 10182 | old_sec = r_reloc_get_section (&r_rel); |
43cd72b9 BW |
10183 | old_offset = r_rel.target_offset; |
10184 | ||
10185 | if (!old_sec || !r_reloc_is_defined (&r_rel)) | |
e0001a05 | 10186 | { |
43cd72b9 BW |
10187 | if (r_type != R_XTENSA_ASM_EXPAND) |
10188 | { | |
10189 | (*_bfd_error_handler) | |
10190 | (_("%B(%A+0x%lx): unexpected fix for %s relocation"), | |
10191 | input_bfd, input_section, rel->r_offset, | |
10192 | elf_howto_table[r_type].name); | |
10193 | return FALSE; | |
10194 | } | |
e0001a05 NC |
10195 | /* Leave it be. Resolution will happen in a later stage. */ |
10196 | } | |
10197 | else | |
10198 | { | |
10199 | sec = fix->target_sec; | |
10200 | rel->r_addend += ((sec->output_offset + fix->target_offset) | |
10201 | - (old_sec->output_offset + old_offset)); | |
10202 | } | |
43cd72b9 | 10203 | return TRUE; |
e0001a05 NC |
10204 | } |
10205 | ||
10206 | ||
10207 | static void | |
7fa3d080 BW |
10208 | do_fix_for_final_link (Elf_Internal_Rela *rel, |
10209 | bfd *input_bfd, | |
10210 | asection *input_section, | |
10211 | bfd_byte *contents, | |
10212 | bfd_vma *relocationp) | |
e0001a05 NC |
10213 | { |
10214 | asection *sec; | |
10215 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 | 10216 | reloc_bfd_fix *fix; |
43cd72b9 | 10217 | bfd_vma fixup_diff; |
e0001a05 NC |
10218 | |
10219 | if (r_type == R_XTENSA_NONE) | |
10220 | return; | |
10221 | ||
43cd72b9 BW |
10222 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10223 | if (!fix) | |
e0001a05 NC |
10224 | return; |
10225 | ||
10226 | sec = fix->target_sec; | |
43cd72b9 BW |
10227 | |
10228 | fixup_diff = rel->r_addend; | |
10229 | if (elf_howto_table[fix->src_type].partial_inplace) | |
10230 | { | |
10231 | bfd_vma inplace_val; | |
10232 | BFD_ASSERT (fix->src_offset | |
10233 | < bfd_get_section_limit (input_bfd, input_section)); | |
10234 | inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]); | |
10235 | fixup_diff += inplace_val; | |
10236 | } | |
10237 | ||
e0001a05 NC |
10238 | *relocationp = (sec->output_section->vma |
10239 | + sec->output_offset | |
43cd72b9 | 10240 | + fix->target_offset - fixup_diff); |
e0001a05 NC |
10241 | } |
10242 | ||
10243 | \f | |
10244 | /* Miscellaneous utility functions.... */ | |
10245 | ||
10246 | static asection * | |
f0e6fdb2 | 10247 | elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10248 | { |
f0e6fdb2 BW |
10249 | struct elf_xtensa_link_hash_table *htab; |
10250 | bfd *dynobj; | |
e0001a05 NC |
10251 | char plt_name[10]; |
10252 | ||
10253 | if (chunk == 0) | |
f0e6fdb2 BW |
10254 | { |
10255 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
10256 | if (htab == NULL) |
10257 | return NULL; | |
10258 | ||
f0e6fdb2 BW |
10259 | return htab->splt; |
10260 | } | |
e0001a05 | 10261 | |
f0e6fdb2 | 10262 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
10263 | sprintf (plt_name, ".plt.%u", chunk); |
10264 | return bfd_get_section_by_name (dynobj, plt_name); | |
10265 | } | |
10266 | ||
10267 | ||
10268 | static asection * | |
f0e6fdb2 | 10269 | elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10270 | { |
f0e6fdb2 BW |
10271 | struct elf_xtensa_link_hash_table *htab; |
10272 | bfd *dynobj; | |
e0001a05 NC |
10273 | char got_name[14]; |
10274 | ||
10275 | if (chunk == 0) | |
f0e6fdb2 BW |
10276 | { |
10277 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
10278 | if (htab == NULL) |
10279 | return NULL; | |
f0e6fdb2 BW |
10280 | return htab->sgotplt; |
10281 | } | |
e0001a05 | 10282 | |
f0e6fdb2 | 10283 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
10284 | sprintf (got_name, ".got.plt.%u", chunk); |
10285 | return bfd_get_section_by_name (dynobj, got_name); | |
10286 | } | |
10287 | ||
10288 | ||
10289 | /* Get the input section for a given symbol index. | |
10290 | If the symbol is: | |
10291 | . a section symbol, return the section; | |
10292 | . a common symbol, return the common section; | |
10293 | . an undefined symbol, return the undefined section; | |
10294 | . an indirect symbol, follow the links; | |
10295 | . an absolute value, return the absolute section. */ | |
10296 | ||
10297 | static asection * | |
7fa3d080 | 10298 | get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10299 | { |
10300 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10301 | asection *target_sec = NULL; | |
43cd72b9 | 10302 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10303 | { |
10304 | Elf_Internal_Sym *isymbuf; | |
10305 | unsigned int section_index; | |
10306 | ||
10307 | isymbuf = retrieve_local_syms (abfd); | |
10308 | section_index = isymbuf[r_symndx].st_shndx; | |
10309 | ||
10310 | if (section_index == SHN_UNDEF) | |
10311 | target_sec = bfd_und_section_ptr; | |
e0001a05 NC |
10312 | else if (section_index == SHN_ABS) |
10313 | target_sec = bfd_abs_section_ptr; | |
10314 | else if (section_index == SHN_COMMON) | |
10315 | target_sec = bfd_com_section_ptr; | |
43cd72b9 | 10316 | else |
cb33740c | 10317 | target_sec = bfd_section_from_elf_index (abfd, section_index); |
e0001a05 NC |
10318 | } |
10319 | else | |
10320 | { | |
10321 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10322 | struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx]; | |
10323 | ||
10324 | while (h->root.type == bfd_link_hash_indirect | |
10325 | || h->root.type == bfd_link_hash_warning) | |
10326 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10327 | ||
10328 | switch (h->root.type) | |
10329 | { | |
10330 | case bfd_link_hash_defined: | |
10331 | case bfd_link_hash_defweak: | |
10332 | target_sec = h->root.u.def.section; | |
10333 | break; | |
10334 | case bfd_link_hash_common: | |
10335 | target_sec = bfd_com_section_ptr; | |
10336 | break; | |
10337 | case bfd_link_hash_undefined: | |
10338 | case bfd_link_hash_undefweak: | |
10339 | target_sec = bfd_und_section_ptr; | |
10340 | break; | |
10341 | default: /* New indirect warning. */ | |
10342 | target_sec = bfd_und_section_ptr; | |
10343 | break; | |
10344 | } | |
10345 | } | |
10346 | return target_sec; | |
10347 | } | |
10348 | ||
10349 | ||
10350 | static struct elf_link_hash_entry * | |
7fa3d080 | 10351 | get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10352 | { |
10353 | unsigned long indx; | |
10354 | struct elf_link_hash_entry *h; | |
10355 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10356 | ||
10357 | if (r_symndx < symtab_hdr->sh_info) | |
10358 | return NULL; | |
43cd72b9 | 10359 | |
e0001a05 NC |
10360 | indx = r_symndx - symtab_hdr->sh_info; |
10361 | h = elf_sym_hashes (abfd)[indx]; | |
10362 | while (h->root.type == bfd_link_hash_indirect | |
10363 | || h->root.type == bfd_link_hash_warning) | |
10364 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10365 | return h; | |
10366 | } | |
10367 | ||
10368 | ||
10369 | /* Get the section-relative offset for a symbol number. */ | |
10370 | ||
10371 | static bfd_vma | |
7fa3d080 | 10372 | get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10373 | { |
10374 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10375 | bfd_vma offset = 0; | |
10376 | ||
43cd72b9 | 10377 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10378 | { |
10379 | Elf_Internal_Sym *isymbuf; | |
10380 | isymbuf = retrieve_local_syms (abfd); | |
10381 | offset = isymbuf[r_symndx].st_value; | |
10382 | } | |
10383 | else | |
10384 | { | |
10385 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10386 | struct elf_link_hash_entry *h = | |
10387 | elf_sym_hashes (abfd)[indx]; | |
10388 | ||
10389 | while (h->root.type == bfd_link_hash_indirect | |
10390 | || h->root.type == bfd_link_hash_warning) | |
10391 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10392 | if (h->root.type == bfd_link_hash_defined | |
10393 | || h->root.type == bfd_link_hash_defweak) | |
10394 | offset = h->root.u.def.value; | |
10395 | } | |
10396 | return offset; | |
10397 | } | |
10398 | ||
10399 | ||
10400 | static bfd_boolean | |
7fa3d080 | 10401 | is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel) |
43cd72b9 BW |
10402 | { |
10403 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
10404 | struct elf_link_hash_entry *h; | |
10405 | ||
10406 | h = get_elf_r_symndx_hash_entry (abfd, r_symndx); | |
10407 | if (h && h->root.type == bfd_link_hash_defweak) | |
10408 | return TRUE; | |
10409 | return FALSE; | |
10410 | } | |
10411 | ||
10412 | ||
10413 | static bfd_boolean | |
7fa3d080 BW |
10414 | pcrel_reloc_fits (xtensa_opcode opc, |
10415 | int opnd, | |
10416 | bfd_vma self_address, | |
10417 | bfd_vma dest_address) | |
e0001a05 | 10418 | { |
43cd72b9 BW |
10419 | xtensa_isa isa = xtensa_default_isa; |
10420 | uint32 valp = dest_address; | |
10421 | if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address) | |
10422 | || xtensa_operand_encode (isa, opc, opnd, &valp)) | |
10423 | return FALSE; | |
10424 | return TRUE; | |
e0001a05 NC |
10425 | } |
10426 | ||
10427 | ||
10428 | static bfd_boolean | |
7fa3d080 | 10429 | xtensa_is_property_section (asection *sec) |
e0001a05 | 10430 | { |
1d25768e BW |
10431 | if (xtensa_is_insntable_section (sec) |
10432 | || xtensa_is_littable_section (sec) | |
10433 | || xtensa_is_proptable_section (sec)) | |
b614a702 | 10434 | return TRUE; |
e901de89 | 10435 | |
1d25768e BW |
10436 | return FALSE; |
10437 | } | |
10438 | ||
10439 | ||
10440 | static bfd_boolean | |
10441 | xtensa_is_insntable_section (asection *sec) | |
10442 | { | |
10443 | if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME) | |
10444 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.x.")) | |
e901de89 BW |
10445 | return TRUE; |
10446 | ||
e901de89 BW |
10447 | return FALSE; |
10448 | } | |
10449 | ||
10450 | ||
10451 | static bfd_boolean | |
7fa3d080 | 10452 | xtensa_is_littable_section (asection *sec) |
e901de89 | 10453 | { |
1d25768e BW |
10454 | if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME) |
10455 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.p.")) | |
b614a702 | 10456 | return TRUE; |
e901de89 | 10457 | |
1d25768e BW |
10458 | return FALSE; |
10459 | } | |
10460 | ||
10461 | ||
10462 | static bfd_boolean | |
10463 | xtensa_is_proptable_section (asection *sec) | |
10464 | { | |
10465 | if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME) | |
10466 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop.")) | |
e901de89 | 10467 | return TRUE; |
e0001a05 | 10468 | |
e901de89 | 10469 | return FALSE; |
e0001a05 NC |
10470 | } |
10471 | ||
10472 | ||
43cd72b9 | 10473 | static int |
7fa3d080 | 10474 | internal_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 10475 | { |
43cd72b9 BW |
10476 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; |
10477 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10478 | ||
10479 | if (a->r_offset != b->r_offset) | |
10480 | return (a->r_offset - b->r_offset); | |
10481 | ||
10482 | /* We don't need to sort on these criteria for correctness, | |
10483 | but enforcing a more strict ordering prevents unstable qsort | |
10484 | from behaving differently with different implementations. | |
10485 | Without the code below we get correct but different results | |
10486 | on Solaris 2.7 and 2.8. We would like to always produce the | |
10487 | same results no matter the host. */ | |
10488 | ||
10489 | if (a->r_info != b->r_info) | |
10490 | return (a->r_info - b->r_info); | |
10491 | ||
10492 | return (a->r_addend - b->r_addend); | |
e0001a05 NC |
10493 | } |
10494 | ||
10495 | ||
10496 | static int | |
7fa3d080 | 10497 | internal_reloc_matches (const void *ap, const void *bp) |
e0001a05 NC |
10498 | { |
10499 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; | |
10500 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10501 | ||
43cd72b9 BW |
10502 | /* Check if one entry overlaps with the other; this shouldn't happen |
10503 | except when searching for a match. */ | |
e0001a05 NC |
10504 | return (a->r_offset - b->r_offset); |
10505 | } | |
10506 | ||
10507 | ||
74869ac7 BW |
10508 | /* Predicate function used to look up a section in a particular group. */ |
10509 | ||
10510 | static bfd_boolean | |
10511 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
10512 | { | |
10513 | const char *gname = inf; | |
10514 | const char *group_name = elf_group_name (sec); | |
10515 | ||
10516 | return (group_name == gname | |
10517 | || (group_name != NULL | |
10518 | && gname != NULL | |
10519 | && strcmp (group_name, gname) == 0)); | |
10520 | } | |
10521 | ||
10522 | ||
1d25768e BW |
10523 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
10524 | ||
51c8ebc1 BW |
10525 | static char * |
10526 | xtensa_property_section_name (asection *sec, const char *base_name) | |
e0001a05 | 10527 | { |
74869ac7 BW |
10528 | const char *suffix, *group_name; |
10529 | char *prop_sec_name; | |
74869ac7 BW |
10530 | |
10531 | group_name = elf_group_name (sec); | |
10532 | if (group_name) | |
10533 | { | |
10534 | suffix = strrchr (sec->name, '.'); | |
10535 | if (suffix == sec->name) | |
10536 | suffix = 0; | |
10537 | prop_sec_name = (char *) bfd_malloc (strlen (base_name) + 1 | |
10538 | + (suffix ? strlen (suffix) : 0)); | |
10539 | strcpy (prop_sec_name, base_name); | |
10540 | if (suffix) | |
10541 | strcat (prop_sec_name, suffix); | |
10542 | } | |
10543 | else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0) | |
e0001a05 | 10544 | { |
43cd72b9 | 10545 | char *linkonce_kind = 0; |
b614a702 BW |
10546 | |
10547 | if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0) | |
7db48a12 | 10548 | linkonce_kind = "x."; |
b614a702 | 10549 | else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0) |
7db48a12 | 10550 | linkonce_kind = "p."; |
43cd72b9 BW |
10551 | else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0) |
10552 | linkonce_kind = "prop."; | |
e0001a05 | 10553 | else |
b614a702 BW |
10554 | abort (); |
10555 | ||
43cd72b9 BW |
10556 | prop_sec_name = (char *) bfd_malloc (strlen (sec->name) |
10557 | + strlen (linkonce_kind) + 1); | |
b614a702 | 10558 | memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len); |
43cd72b9 | 10559 | strcpy (prop_sec_name + linkonce_len, linkonce_kind); |
b614a702 BW |
10560 | |
10561 | suffix = sec->name + linkonce_len; | |
096c35a7 | 10562 | /* For backward compatibility, replace "t." instead of inserting |
43cd72b9 | 10563 | the new linkonce_kind (but not for "prop" sections). */ |
0112cd26 | 10564 | if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.') |
43cd72b9 BW |
10565 | suffix += 2; |
10566 | strcat (prop_sec_name + linkonce_len, suffix); | |
74869ac7 BW |
10567 | } |
10568 | else | |
10569 | prop_sec_name = strdup (base_name); | |
10570 | ||
51c8ebc1 BW |
10571 | return prop_sec_name; |
10572 | } | |
10573 | ||
10574 | ||
10575 | static asection * | |
10576 | xtensa_get_property_section (asection *sec, const char *base_name) | |
10577 | { | |
10578 | char *prop_sec_name; | |
10579 | asection *prop_sec; | |
10580 | ||
10581 | prop_sec_name = xtensa_property_section_name (sec, base_name); | |
10582 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, | |
10583 | match_section_group, | |
10584 | (void *) elf_group_name (sec)); | |
10585 | free (prop_sec_name); | |
10586 | return prop_sec; | |
10587 | } | |
10588 | ||
10589 | ||
10590 | asection * | |
10591 | xtensa_make_property_section (asection *sec, const char *base_name) | |
10592 | { | |
10593 | char *prop_sec_name; | |
10594 | asection *prop_sec; | |
10595 | ||
74869ac7 | 10596 | /* Check if the section already exists. */ |
51c8ebc1 | 10597 | prop_sec_name = xtensa_property_section_name (sec, base_name); |
74869ac7 BW |
10598 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, |
10599 | match_section_group, | |
51c8ebc1 | 10600 | (void *) elf_group_name (sec)); |
74869ac7 BW |
10601 | /* If not, create it. */ |
10602 | if (! prop_sec) | |
10603 | { | |
10604 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
10605 | flags |= (bfd_get_section_flags (sec->owner, sec) | |
10606 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)); | |
10607 | ||
10608 | prop_sec = bfd_make_section_anyway_with_flags | |
10609 | (sec->owner, strdup (prop_sec_name), flags); | |
10610 | if (! prop_sec) | |
10611 | return 0; | |
b614a702 | 10612 | |
51c8ebc1 | 10613 | elf_group_name (prop_sec) = elf_group_name (sec); |
e0001a05 NC |
10614 | } |
10615 | ||
74869ac7 BW |
10616 | free (prop_sec_name); |
10617 | return prop_sec; | |
e0001a05 NC |
10618 | } |
10619 | ||
43cd72b9 BW |
10620 | |
10621 | flagword | |
7fa3d080 | 10622 | xtensa_get_property_predef_flags (asection *sec) |
43cd72b9 | 10623 | { |
1d25768e | 10624 | if (xtensa_is_insntable_section (sec)) |
43cd72b9 | 10625 | return (XTENSA_PROP_INSN |
99ded152 | 10626 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
10627 | | XTENSA_PROP_INSN_NO_REORDER); |
10628 | ||
10629 | if (xtensa_is_littable_section (sec)) | |
10630 | return (XTENSA_PROP_LITERAL | |
99ded152 | 10631 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
10632 | | XTENSA_PROP_INSN_NO_REORDER); |
10633 | ||
10634 | return 0; | |
10635 | } | |
10636 | ||
e0001a05 NC |
10637 | \f |
10638 | /* Other functions called directly by the linker. */ | |
10639 | ||
10640 | bfd_boolean | |
7fa3d080 BW |
10641 | xtensa_callback_required_dependence (bfd *abfd, |
10642 | asection *sec, | |
10643 | struct bfd_link_info *link_info, | |
10644 | deps_callback_t callback, | |
10645 | void *closure) | |
e0001a05 NC |
10646 | { |
10647 | Elf_Internal_Rela *internal_relocs; | |
10648 | bfd_byte *contents; | |
10649 | unsigned i; | |
10650 | bfd_boolean ok = TRUE; | |
43cd72b9 BW |
10651 | bfd_size_type sec_size; |
10652 | ||
10653 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 NC |
10654 | |
10655 | /* ".plt*" sections have no explicit relocations but they contain L32R | |
10656 | instructions that reference the corresponding ".got.plt*" sections. */ | |
10657 | if ((sec->flags & SEC_LINKER_CREATED) != 0 | |
0112cd26 | 10658 | && CONST_STRNEQ (sec->name, ".plt")) |
e0001a05 NC |
10659 | { |
10660 | asection *sgotplt; | |
10661 | ||
10662 | /* Find the corresponding ".got.plt*" section. */ | |
10663 | if (sec->name[4] == '\0') | |
10664 | sgotplt = bfd_get_section_by_name (sec->owner, ".got.plt"); | |
10665 | else | |
10666 | { | |
10667 | char got_name[14]; | |
10668 | int chunk = 0; | |
10669 | ||
10670 | BFD_ASSERT (sec->name[4] == '.'); | |
10671 | chunk = strtol (&sec->name[5], NULL, 10); | |
10672 | ||
10673 | sprintf (got_name, ".got.plt.%u", chunk); | |
10674 | sgotplt = bfd_get_section_by_name (sec->owner, got_name); | |
10675 | } | |
10676 | BFD_ASSERT (sgotplt); | |
10677 | ||
10678 | /* Assume worst-case offsets: L32R at the very end of the ".plt" | |
10679 | section referencing a literal at the very beginning of | |
10680 | ".got.plt". This is very close to the real dependence, anyway. */ | |
43cd72b9 | 10681 | (*callback) (sec, sec_size, sgotplt, 0, closure); |
e0001a05 NC |
10682 | } |
10683 | ||
13161072 BW |
10684 | /* Only ELF files are supported for Xtensa. Check here to avoid a segfault |
10685 | when building uclibc, which runs "ld -b binary /dev/null". */ | |
10686 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
10687 | return ok; | |
10688 | ||
e0001a05 NC |
10689 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
10690 | link_info->keep_memory); | |
10691 | if (internal_relocs == NULL | |
43cd72b9 | 10692 | || sec->reloc_count == 0) |
e0001a05 NC |
10693 | return ok; |
10694 | ||
10695 | /* Cache the contents for the duration of this scan. */ | |
10696 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 10697 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
10698 | { |
10699 | ok = FALSE; | |
10700 | goto error_return; | |
10701 | } | |
10702 | ||
43cd72b9 BW |
10703 | if (!xtensa_default_isa) |
10704 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 10705 | |
43cd72b9 | 10706 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
10707 | { |
10708 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 | 10709 | if (is_l32r_relocation (abfd, sec, contents, irel)) |
e0001a05 NC |
10710 | { |
10711 | r_reloc l32r_rel; | |
10712 | asection *target_sec; | |
10713 | bfd_vma target_offset; | |
43cd72b9 BW |
10714 | |
10715 | r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size); | |
e0001a05 NC |
10716 | target_sec = NULL; |
10717 | target_offset = 0; | |
10718 | /* L32Rs must be local to the input file. */ | |
10719 | if (r_reloc_is_defined (&l32r_rel)) | |
10720 | { | |
10721 | target_sec = r_reloc_get_section (&l32r_rel); | |
43cd72b9 | 10722 | target_offset = l32r_rel.target_offset; |
e0001a05 NC |
10723 | } |
10724 | (*callback) (sec, irel->r_offset, target_sec, target_offset, | |
10725 | closure); | |
10726 | } | |
10727 | } | |
10728 | ||
10729 | error_return: | |
10730 | release_internal_relocs (sec, internal_relocs); | |
10731 | release_contents (sec, contents); | |
10732 | return ok; | |
10733 | } | |
10734 | ||
2f89ff8d L |
10735 | /* The default literal sections should always be marked as "code" (i.e., |
10736 | SHF_EXECINSTR). This is particularly important for the Linux kernel | |
10737 | module loader so that the literals are not placed after the text. */ | |
b35d266b | 10738 | static const struct bfd_elf_special_section elf_xtensa_special_sections[] = |
2f89ff8d | 10739 | { |
0112cd26 NC |
10740 | { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
10741 | { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
10742 | { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2caa7ca0 | 10743 | { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 }, |
0112cd26 | 10744 | { NULL, 0, 0, 0, 0 } |
7f4d3958 | 10745 | }; |
e0001a05 NC |
10746 | \f |
10747 | #ifndef ELF_ARCH | |
10748 | #define TARGET_LITTLE_SYM bfd_elf32_xtensa_le_vec | |
10749 | #define TARGET_LITTLE_NAME "elf32-xtensa-le" | |
10750 | #define TARGET_BIG_SYM bfd_elf32_xtensa_be_vec | |
10751 | #define TARGET_BIG_NAME "elf32-xtensa-be" | |
10752 | #define ELF_ARCH bfd_arch_xtensa | |
10753 | ||
4af0a1d8 BW |
10754 | #define ELF_MACHINE_CODE EM_XTENSA |
10755 | #define ELF_MACHINE_ALT1 EM_XTENSA_OLD | |
e0001a05 NC |
10756 | |
10757 | #if XCHAL_HAVE_MMU | |
10758 | #define ELF_MAXPAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE) | |
10759 | #else /* !XCHAL_HAVE_MMU */ | |
10760 | #define ELF_MAXPAGESIZE 1 | |
10761 | #endif /* !XCHAL_HAVE_MMU */ | |
10762 | #endif /* ELF_ARCH */ | |
10763 | ||
10764 | #define elf_backend_can_gc_sections 1 | |
10765 | #define elf_backend_can_refcount 1 | |
10766 | #define elf_backend_plt_readonly 1 | |
10767 | #define elf_backend_got_header_size 4 | |
10768 | #define elf_backend_want_dynbss 0 | |
10769 | #define elf_backend_want_got_plt 1 | |
10770 | ||
10771 | #define elf_info_to_howto elf_xtensa_info_to_howto_rela | |
10772 | ||
28dbbc02 BW |
10773 | #define bfd_elf32_mkobject elf_xtensa_mkobject |
10774 | ||
e0001a05 NC |
10775 | #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data |
10776 | #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook | |
10777 | #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data | |
10778 | #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section | |
10779 | #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup | |
157090f7 AM |
10780 | #define bfd_elf32_bfd_reloc_name_lookup \ |
10781 | elf_xtensa_reloc_name_lookup | |
e0001a05 | 10782 | #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags |
f0e6fdb2 | 10783 | #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create |
e0001a05 NC |
10784 | |
10785 | #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol | |
10786 | #define elf_backend_check_relocs elf_xtensa_check_relocs | |
e0001a05 NC |
10787 | #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections |
10788 | #define elf_backend_discard_info elf_xtensa_discard_info | |
10789 | #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs | |
10790 | #define elf_backend_final_write_processing elf_xtensa_final_write_processing | |
10791 | #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections | |
10792 | #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol | |
10793 | #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook | |
10794 | #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook | |
10795 | #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus | |
10796 | #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo | |
95147441 | 10797 | #define elf_backend_hide_symbol elf_xtensa_hide_symbol |
e0001a05 NC |
10798 | #define elf_backend_object_p elf_xtensa_object_p |
10799 | #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class | |
10800 | #define elf_backend_relocate_section elf_xtensa_relocate_section | |
10801 | #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections | |
28dbbc02 | 10802 | #define elf_backend_always_size_sections elf_xtensa_always_size_sections |
74541ad4 AM |
10803 | #define elf_backend_omit_section_dynsym \ |
10804 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
29ef7005 | 10805 | #define elf_backend_special_sections elf_xtensa_special_sections |
a77dc2cc | 10806 | #define elf_backend_action_discarded elf_xtensa_action_discarded |
28dbbc02 | 10807 | #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol |
e0001a05 NC |
10808 | |
10809 | #include "elf32-target.h" |