Commit | Line | Data |
---|---|---|
e0001a05 | 1 | /* Xtensa-specific support for 32-bit ELF. |
aa820537 AM |
2 | Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
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 \ | |
575 | && elf_object_id (bfd) == XTENSA_ELF_TDATA) | |
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), | |
581 | XTENSA_ELF_TDATA); | |
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) \ | |
613 | ((struct elf_xtensa_link_hash_table *) ((p)->hash)) | |
614 | ||
28dbbc02 BW |
615 | /* Create an entry in an Xtensa ELF linker hash table. */ |
616 | ||
617 | static struct bfd_hash_entry * | |
618 | elf_xtensa_link_hash_newfunc (struct bfd_hash_entry *entry, | |
619 | struct bfd_hash_table *table, | |
620 | const char *string) | |
621 | { | |
622 | /* Allocate the structure if it has not already been allocated by a | |
623 | subclass. */ | |
624 | if (entry == NULL) | |
625 | { | |
626 | entry = bfd_hash_allocate (table, | |
627 | sizeof (struct elf_xtensa_link_hash_entry)); | |
628 | if (entry == NULL) | |
629 | return entry; | |
630 | } | |
631 | ||
632 | /* Call the allocation method of the superclass. */ | |
633 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
634 | if (entry != NULL) | |
635 | { | |
636 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (entry); | |
637 | eh->tlsfunc_refcount = 0; | |
638 | eh->tls_type = GOT_UNKNOWN; | |
639 | } | |
640 | ||
641 | return entry; | |
642 | } | |
643 | ||
f0e6fdb2 BW |
644 | /* Create an Xtensa ELF linker hash table. */ |
645 | ||
646 | static struct bfd_link_hash_table * | |
647 | elf_xtensa_link_hash_table_create (bfd *abfd) | |
648 | { | |
28dbbc02 | 649 | struct elf_link_hash_entry *tlsbase; |
f0e6fdb2 BW |
650 | struct elf_xtensa_link_hash_table *ret; |
651 | bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table); | |
652 | ||
653 | ret = bfd_malloc (amt); | |
654 | if (ret == NULL) | |
655 | return NULL; | |
656 | ||
657 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
28dbbc02 BW |
658 | elf_xtensa_link_hash_newfunc, |
659 | sizeof (struct elf_xtensa_link_hash_entry))) | |
f0e6fdb2 BW |
660 | { |
661 | free (ret); | |
662 | return NULL; | |
663 | } | |
664 | ||
665 | ret->sgot = NULL; | |
666 | ret->sgotplt = NULL; | |
667 | ret->srelgot = NULL; | |
668 | ret->splt = NULL; | |
669 | ret->srelplt = NULL; | |
670 | ret->sgotloc = NULL; | |
671 | ret->spltlittbl = NULL; | |
672 | ||
673 | ret->plt_reloc_count = 0; | |
674 | ||
28dbbc02 BW |
675 | /* Create a hash entry for "_TLS_MODULE_BASE_" to speed up checking |
676 | for it later. */ | |
677 | tlsbase = elf_link_hash_lookup (&ret->elf, "_TLS_MODULE_BASE_", | |
678 | TRUE, FALSE, FALSE); | |
679 | tlsbase->root.type = bfd_link_hash_new; | |
680 | tlsbase->root.u.undef.abfd = NULL; | |
681 | tlsbase->non_elf = 0; | |
682 | ret->tlsbase = elf_xtensa_hash_entry (tlsbase); | |
683 | ret->tlsbase->tls_type = GOT_UNKNOWN; | |
684 | ||
f0e6fdb2 BW |
685 | return &ret->elf.root; |
686 | } | |
571b5725 | 687 | |
28dbbc02 BW |
688 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
689 | ||
690 | static void | |
691 | elf_xtensa_copy_indirect_symbol (struct bfd_link_info *info, | |
692 | struct elf_link_hash_entry *dir, | |
693 | struct elf_link_hash_entry *ind) | |
694 | { | |
695 | struct elf_xtensa_link_hash_entry *edir, *eind; | |
696 | ||
697 | edir = elf_xtensa_hash_entry (dir); | |
698 | eind = elf_xtensa_hash_entry (ind); | |
699 | ||
700 | if (ind->root.type == bfd_link_hash_indirect) | |
701 | { | |
702 | edir->tlsfunc_refcount += eind->tlsfunc_refcount; | |
703 | eind->tlsfunc_refcount = 0; | |
704 | ||
705 | if (dir->got.refcount <= 0) | |
706 | { | |
707 | edir->tls_type = eind->tls_type; | |
708 | eind->tls_type = GOT_UNKNOWN; | |
709 | } | |
710 | } | |
711 | ||
712 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
713 | } | |
714 | ||
571b5725 | 715 | static inline bfd_boolean |
4608f3d9 | 716 | elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h, |
7fa3d080 | 717 | struct bfd_link_info *info) |
571b5725 BW |
718 | { |
719 | /* Check if we should do dynamic things to this symbol. The | |
720 | "ignore_protected" argument need not be set, because Xtensa code | |
721 | does not require special handling of STV_PROTECTED to make function | |
722 | pointer comparisons work properly. The PLT addresses are never | |
723 | used for function pointers. */ | |
724 | ||
725 | return _bfd_elf_dynamic_symbol_p (h, info, 0); | |
726 | } | |
727 | ||
e0001a05 NC |
728 | \f |
729 | static int | |
7fa3d080 | 730 | property_table_compare (const void *ap, const void *bp) |
e0001a05 NC |
731 | { |
732 | const property_table_entry *a = (const property_table_entry *) ap; | |
733 | const property_table_entry *b = (const property_table_entry *) bp; | |
734 | ||
43cd72b9 BW |
735 | if (a->address == b->address) |
736 | { | |
43cd72b9 BW |
737 | if (a->size != b->size) |
738 | return (a->size - b->size); | |
739 | ||
740 | if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN)) | |
741 | return ((b->flags & XTENSA_PROP_ALIGN) | |
742 | - (a->flags & XTENSA_PROP_ALIGN)); | |
743 | ||
744 | if ((a->flags & XTENSA_PROP_ALIGN) | |
745 | && (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
746 | != GET_XTENSA_PROP_ALIGNMENT (b->flags))) | |
747 | return (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
748 | - GET_XTENSA_PROP_ALIGNMENT (b->flags)); | |
749 | ||
750 | if ((a->flags & XTENSA_PROP_UNREACHABLE) | |
751 | != (b->flags & XTENSA_PROP_UNREACHABLE)) | |
752 | return ((b->flags & XTENSA_PROP_UNREACHABLE) | |
753 | - (a->flags & XTENSA_PROP_UNREACHABLE)); | |
754 | ||
755 | return (a->flags - b->flags); | |
756 | } | |
757 | ||
758 | return (a->address - b->address); | |
759 | } | |
760 | ||
761 | ||
762 | static int | |
7fa3d080 | 763 | property_table_matches (const void *ap, const void *bp) |
43cd72b9 BW |
764 | { |
765 | const property_table_entry *a = (const property_table_entry *) ap; | |
766 | const property_table_entry *b = (const property_table_entry *) bp; | |
767 | ||
768 | /* Check if one entry overlaps with the other. */ | |
e0001a05 NC |
769 | if ((b->address >= a->address && b->address < (a->address + a->size)) |
770 | || (a->address >= b->address && a->address < (b->address + b->size))) | |
771 | return 0; | |
772 | ||
773 | return (a->address - b->address); | |
774 | } | |
775 | ||
776 | ||
43cd72b9 BW |
777 | /* Get the literal table or property table entries for the given |
778 | section. Sets TABLE_P and returns the number of entries. On | |
779 | error, returns a negative value. */ | |
e0001a05 | 780 | |
7fa3d080 BW |
781 | static int |
782 | xtensa_read_table_entries (bfd *abfd, | |
783 | asection *section, | |
784 | property_table_entry **table_p, | |
785 | const char *sec_name, | |
786 | bfd_boolean output_addr) | |
e0001a05 NC |
787 | { |
788 | asection *table_section; | |
e0001a05 NC |
789 | bfd_size_type table_size = 0; |
790 | bfd_byte *table_data; | |
791 | property_table_entry *blocks; | |
e4115460 | 792 | int blk, block_count; |
e0001a05 | 793 | bfd_size_type num_records; |
bcc2cc8e BW |
794 | Elf_Internal_Rela *internal_relocs, *irel, *rel_end; |
795 | bfd_vma section_addr, off; | |
43cd72b9 | 796 | flagword predef_flags; |
bcc2cc8e | 797 | bfd_size_type table_entry_size, section_limit; |
43cd72b9 BW |
798 | |
799 | if (!section | |
800 | || !(section->flags & SEC_ALLOC) | |
801 | || (section->flags & SEC_DEBUGGING)) | |
802 | { | |
803 | *table_p = NULL; | |
804 | return 0; | |
805 | } | |
e0001a05 | 806 | |
74869ac7 | 807 | table_section = xtensa_get_property_section (section, sec_name); |
43cd72b9 | 808 | if (table_section) |
eea6121a | 809 | table_size = table_section->size; |
43cd72b9 | 810 | |
e0001a05 NC |
811 | if (table_size == 0) |
812 | { | |
813 | *table_p = NULL; | |
814 | return 0; | |
815 | } | |
816 | ||
43cd72b9 BW |
817 | predef_flags = xtensa_get_property_predef_flags (table_section); |
818 | table_entry_size = 12; | |
819 | if (predef_flags) | |
820 | table_entry_size -= 4; | |
821 | ||
822 | num_records = table_size / table_entry_size; | |
e0001a05 NC |
823 | table_data = retrieve_contents (abfd, table_section, TRUE); |
824 | blocks = (property_table_entry *) | |
825 | bfd_malloc (num_records * sizeof (property_table_entry)); | |
826 | block_count = 0; | |
43cd72b9 BW |
827 | |
828 | if (output_addr) | |
829 | section_addr = section->output_section->vma + section->output_offset; | |
830 | else | |
831 | section_addr = section->vma; | |
3ba3bc8c | 832 | |
e0001a05 | 833 | internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE); |
3ba3bc8c | 834 | if (internal_relocs && !table_section->reloc_done) |
e0001a05 | 835 | { |
bcc2cc8e BW |
836 | qsort (internal_relocs, table_section->reloc_count, |
837 | sizeof (Elf_Internal_Rela), internal_reloc_compare); | |
838 | irel = internal_relocs; | |
839 | } | |
840 | else | |
841 | irel = NULL; | |
842 | ||
843 | section_limit = bfd_get_section_limit (abfd, section); | |
844 | rel_end = internal_relocs + table_section->reloc_count; | |
845 | ||
846 | for (off = 0; off < table_size; off += table_entry_size) | |
847 | { | |
848 | bfd_vma address = bfd_get_32 (abfd, table_data + off); | |
849 | ||
850 | /* Skip any relocations before the current offset. This should help | |
851 | avoid confusion caused by unexpected relocations for the preceding | |
852 | table entry. */ | |
853 | while (irel && | |
854 | (irel->r_offset < off | |
855 | || (irel->r_offset == off | |
856 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE))) | |
857 | { | |
858 | irel += 1; | |
859 | if (irel >= rel_end) | |
860 | irel = 0; | |
861 | } | |
e0001a05 | 862 | |
bcc2cc8e | 863 | if (irel && irel->r_offset == off) |
e0001a05 | 864 | { |
bcc2cc8e BW |
865 | bfd_vma sym_off; |
866 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); | |
867 | BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32); | |
e0001a05 | 868 | |
bcc2cc8e | 869 | if (get_elf_r_symndx_section (abfd, r_symndx) != section) |
e0001a05 NC |
870 | continue; |
871 | ||
bcc2cc8e BW |
872 | sym_off = get_elf_r_symndx_offset (abfd, r_symndx); |
873 | BFD_ASSERT (sym_off == 0); | |
874 | address += (section_addr + sym_off + irel->r_addend); | |
e0001a05 | 875 | } |
bcc2cc8e | 876 | else |
e0001a05 | 877 | { |
bcc2cc8e BW |
878 | if (address < section_addr |
879 | || address >= section_addr + section_limit) | |
880 | continue; | |
e0001a05 | 881 | } |
bcc2cc8e BW |
882 | |
883 | blocks[block_count].address = address; | |
884 | blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4); | |
885 | if (predef_flags) | |
886 | blocks[block_count].flags = predef_flags; | |
887 | else | |
888 | blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8); | |
889 | block_count++; | |
e0001a05 NC |
890 | } |
891 | ||
892 | release_contents (table_section, table_data); | |
893 | release_internal_relocs (table_section, internal_relocs); | |
894 | ||
43cd72b9 | 895 | if (block_count > 0) |
e0001a05 NC |
896 | { |
897 | /* Now sort them into address order for easy reference. */ | |
898 | qsort (blocks, block_count, sizeof (property_table_entry), | |
899 | property_table_compare); | |
e4115460 BW |
900 | |
901 | /* Check that the table contents are valid. Problems may occur, | |
902 | for example, if an unrelocated object file is stripped. */ | |
903 | for (blk = 1; blk < block_count; blk++) | |
904 | { | |
905 | /* The only circumstance where two entries may legitimately | |
906 | have the same address is when one of them is a zero-size | |
907 | placeholder to mark a place where fill can be inserted. | |
908 | The zero-size entry should come first. */ | |
909 | if (blocks[blk - 1].address == blocks[blk].address && | |
910 | blocks[blk - 1].size != 0) | |
911 | { | |
912 | (*_bfd_error_handler) (_("%B(%A): invalid property table"), | |
913 | abfd, section); | |
914 | bfd_set_error (bfd_error_bad_value); | |
915 | free (blocks); | |
916 | return -1; | |
917 | } | |
918 | } | |
e0001a05 | 919 | } |
43cd72b9 | 920 | |
e0001a05 NC |
921 | *table_p = blocks; |
922 | return block_count; | |
923 | } | |
924 | ||
925 | ||
7fa3d080 BW |
926 | static property_table_entry * |
927 | elf_xtensa_find_property_entry (property_table_entry *property_table, | |
928 | int property_table_size, | |
929 | bfd_vma addr) | |
e0001a05 NC |
930 | { |
931 | property_table_entry entry; | |
43cd72b9 | 932 | property_table_entry *rv; |
e0001a05 | 933 | |
43cd72b9 BW |
934 | if (property_table_size == 0) |
935 | return NULL; | |
e0001a05 NC |
936 | |
937 | entry.address = addr; | |
938 | entry.size = 1; | |
43cd72b9 | 939 | entry.flags = 0; |
e0001a05 | 940 | |
43cd72b9 BW |
941 | rv = bsearch (&entry, property_table, property_table_size, |
942 | sizeof (property_table_entry), property_table_matches); | |
943 | return rv; | |
944 | } | |
945 | ||
946 | ||
947 | static bfd_boolean | |
7fa3d080 BW |
948 | elf_xtensa_in_literal_pool (property_table_entry *lit_table, |
949 | int lit_table_size, | |
950 | bfd_vma addr) | |
43cd72b9 BW |
951 | { |
952 | if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr)) | |
e0001a05 NC |
953 | return TRUE; |
954 | ||
955 | return FALSE; | |
956 | } | |
957 | ||
958 | \f | |
959 | /* Look through the relocs for a section during the first phase, and | |
960 | calculate needed space in the dynamic reloc sections. */ | |
961 | ||
962 | static bfd_boolean | |
7fa3d080 BW |
963 | elf_xtensa_check_relocs (bfd *abfd, |
964 | struct bfd_link_info *info, | |
965 | asection *sec, | |
966 | const Elf_Internal_Rela *relocs) | |
e0001a05 | 967 | { |
f0e6fdb2 | 968 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
969 | Elf_Internal_Shdr *symtab_hdr; |
970 | struct elf_link_hash_entry **sym_hashes; | |
971 | const Elf_Internal_Rela *rel; | |
972 | const Elf_Internal_Rela *rel_end; | |
e0001a05 | 973 | |
28dbbc02 | 974 | if (info->relocatable || (sec->flags & SEC_ALLOC) == 0) |
e0001a05 NC |
975 | return TRUE; |
976 | ||
28dbbc02 BW |
977 | BFD_ASSERT (is_xtensa_elf (abfd)); |
978 | ||
f0e6fdb2 | 979 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
980 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
981 | sym_hashes = elf_sym_hashes (abfd); | |
982 | ||
e0001a05 NC |
983 | rel_end = relocs + sec->reloc_count; |
984 | for (rel = relocs; rel < rel_end; rel++) | |
985 | { | |
986 | unsigned int r_type; | |
987 | unsigned long r_symndx; | |
28dbbc02 BW |
988 | struct elf_link_hash_entry *h = NULL; |
989 | struct elf_xtensa_link_hash_entry *eh; | |
990 | int tls_type, old_tls_type; | |
991 | bfd_boolean is_got = FALSE; | |
992 | bfd_boolean is_plt = FALSE; | |
993 | bfd_boolean is_tlsfunc = FALSE; | |
e0001a05 NC |
994 | |
995 | r_symndx = ELF32_R_SYM (rel->r_info); | |
996 | r_type = ELF32_R_TYPE (rel->r_info); | |
997 | ||
998 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
999 | { | |
d003868e AM |
1000 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1001 | abfd, r_symndx); | |
e0001a05 NC |
1002 | return FALSE; |
1003 | } | |
1004 | ||
28dbbc02 | 1005 | if (r_symndx >= symtab_hdr->sh_info) |
e0001a05 NC |
1006 | { |
1007 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1008 | while (h->root.type == bfd_link_hash_indirect | |
1009 | || h->root.type == bfd_link_hash_warning) | |
1010 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1011 | } | |
28dbbc02 | 1012 | eh = elf_xtensa_hash_entry (h); |
e0001a05 NC |
1013 | |
1014 | switch (r_type) | |
1015 | { | |
28dbbc02 BW |
1016 | case R_XTENSA_TLSDESC_FN: |
1017 | if (info->shared) | |
1018 | { | |
1019 | tls_type = GOT_TLS_GD; | |
1020 | is_got = TRUE; | |
1021 | is_tlsfunc = TRUE; | |
1022 | } | |
1023 | else | |
1024 | tls_type = GOT_TLS_IE; | |
1025 | break; | |
e0001a05 | 1026 | |
28dbbc02 BW |
1027 | case R_XTENSA_TLSDESC_ARG: |
1028 | if (info->shared) | |
e0001a05 | 1029 | { |
28dbbc02 BW |
1030 | tls_type = GOT_TLS_GD; |
1031 | is_got = TRUE; | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | tls_type = GOT_TLS_IE; | |
1036 | if (h && elf_xtensa_hash_entry (h) != htab->tlsbase) | |
1037 | is_got = TRUE; | |
e0001a05 NC |
1038 | } |
1039 | break; | |
1040 | ||
28dbbc02 BW |
1041 | case R_XTENSA_TLS_DTPOFF: |
1042 | if (info->shared) | |
1043 | tls_type = GOT_TLS_GD; | |
1044 | else | |
1045 | tls_type = GOT_TLS_IE; | |
1046 | break; | |
1047 | ||
1048 | case R_XTENSA_TLS_TPOFF: | |
1049 | tls_type = GOT_TLS_IE; | |
1050 | if (info->shared) | |
1051 | info->flags |= DF_STATIC_TLS; | |
1052 | if (info->shared || h) | |
1053 | is_got = TRUE; | |
1054 | break; | |
1055 | ||
1056 | case R_XTENSA_32: | |
1057 | tls_type = GOT_NORMAL; | |
1058 | is_got = TRUE; | |
1059 | break; | |
1060 | ||
e0001a05 | 1061 | case R_XTENSA_PLT: |
28dbbc02 BW |
1062 | tls_type = GOT_NORMAL; |
1063 | is_plt = TRUE; | |
1064 | break; | |
e0001a05 | 1065 | |
28dbbc02 BW |
1066 | case R_XTENSA_GNU_VTINHERIT: |
1067 | /* This relocation describes the C++ object vtable hierarchy. | |
1068 | Reconstruct it for later use during GC. */ | |
1069 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1070 | return FALSE; | |
1071 | continue; | |
1072 | ||
1073 | case R_XTENSA_GNU_VTENTRY: | |
1074 | /* This relocation describes which C++ vtable entries are actually | |
1075 | used. Record for later use during GC. */ | |
1076 | BFD_ASSERT (h != NULL); | |
1077 | if (h != NULL | |
1078 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1079 | return FALSE; | |
1080 | continue; | |
1081 | ||
1082 | default: | |
1083 | /* Nothing to do for any other relocations. */ | |
1084 | continue; | |
1085 | } | |
1086 | ||
1087 | if (h) | |
1088 | { | |
1089 | if (is_plt) | |
e0001a05 | 1090 | { |
b45329f9 BW |
1091 | if (h->plt.refcount <= 0) |
1092 | { | |
1093 | h->needs_plt = 1; | |
1094 | h->plt.refcount = 1; | |
1095 | } | |
1096 | else | |
1097 | h->plt.refcount += 1; | |
e0001a05 NC |
1098 | |
1099 | /* Keep track of the total PLT relocation count even if we | |
1100 | don't yet know whether the dynamic sections will be | |
1101 | created. */ | |
f0e6fdb2 | 1102 | htab->plt_reloc_count += 1; |
e0001a05 NC |
1103 | |
1104 | if (elf_hash_table (info)->dynamic_sections_created) | |
1105 | { | |
f0e6fdb2 | 1106 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1107 | return FALSE; |
1108 | } | |
1109 | } | |
28dbbc02 | 1110 | else if (is_got) |
b45329f9 BW |
1111 | { |
1112 | if (h->got.refcount <= 0) | |
1113 | h->got.refcount = 1; | |
1114 | else | |
1115 | h->got.refcount += 1; | |
1116 | } | |
28dbbc02 BW |
1117 | |
1118 | if (is_tlsfunc) | |
1119 | eh->tlsfunc_refcount += 1; | |
e0001a05 | 1120 | |
28dbbc02 BW |
1121 | old_tls_type = eh->tls_type; |
1122 | } | |
1123 | else | |
1124 | { | |
1125 | /* Allocate storage the first time. */ | |
1126 | if (elf_local_got_refcounts (abfd) == NULL) | |
e0001a05 | 1127 | { |
28dbbc02 BW |
1128 | bfd_size_type size = symtab_hdr->sh_info; |
1129 | void *mem; | |
e0001a05 | 1130 | |
28dbbc02 BW |
1131 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); |
1132 | if (mem == NULL) | |
1133 | return FALSE; | |
1134 | elf_local_got_refcounts (abfd) = (bfd_signed_vma *) mem; | |
e0001a05 | 1135 | |
28dbbc02 BW |
1136 | mem = bfd_zalloc (abfd, size); |
1137 | if (mem == NULL) | |
1138 | return FALSE; | |
1139 | elf_xtensa_local_got_tls_type (abfd) = (char *) mem; | |
1140 | ||
1141 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); | |
1142 | if (mem == NULL) | |
1143 | return FALSE; | |
1144 | elf_xtensa_local_tlsfunc_refcounts (abfd) | |
1145 | = (bfd_signed_vma *) mem; | |
e0001a05 | 1146 | } |
e0001a05 | 1147 | |
28dbbc02 BW |
1148 | /* This is a global offset table entry for a local symbol. */ |
1149 | if (is_got || is_plt) | |
1150 | elf_local_got_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1151 | |
28dbbc02 BW |
1152 | if (is_tlsfunc) |
1153 | elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1154 | |
28dbbc02 BW |
1155 | old_tls_type = elf_xtensa_local_got_tls_type (abfd) [r_symndx]; |
1156 | } | |
1157 | ||
1158 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) | |
1159 | tls_type |= old_tls_type; | |
1160 | /* If a TLS symbol is accessed using IE at least once, | |
1161 | there is no point to use a dynamic model for it. */ | |
1162 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
1163 | && ((old_tls_type & GOT_TLS_GD) == 0 | |
1164 | || (tls_type & GOT_TLS_IE) == 0)) | |
1165 | { | |
1166 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GD)) | |
1167 | tls_type = old_tls_type; | |
1168 | else if ((old_tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GD)) | |
1169 | tls_type |= old_tls_type; | |
1170 | else | |
1171 | { | |
1172 | (*_bfd_error_handler) | |
1173 | (_("%B: `%s' accessed both as normal and thread local symbol"), | |
1174 | abfd, | |
1175 | h ? h->root.root.string : "<local>"); | |
1176 | return FALSE; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | if (old_tls_type != tls_type) | |
1181 | { | |
1182 | if (eh) | |
1183 | eh->tls_type = tls_type; | |
1184 | else | |
1185 | elf_xtensa_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
e0001a05 NC |
1186 | } |
1187 | } | |
1188 | ||
e0001a05 NC |
1189 | return TRUE; |
1190 | } | |
1191 | ||
1192 | ||
95147441 BW |
1193 | static void |
1194 | elf_xtensa_make_sym_local (struct bfd_link_info *info, | |
1195 | struct elf_link_hash_entry *h) | |
1196 | { | |
1197 | if (info->shared) | |
1198 | { | |
1199 | if (h->plt.refcount > 0) | |
1200 | { | |
1201 | /* For shared objects, there's no need for PLT entries for local | |
1202 | symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */ | |
1203 | if (h->got.refcount < 0) | |
1204 | h->got.refcount = 0; | |
1205 | h->got.refcount += h->plt.refcount; | |
1206 | h->plt.refcount = 0; | |
1207 | } | |
1208 | } | |
1209 | else | |
1210 | { | |
1211 | /* Don't need any dynamic relocations at all. */ | |
1212 | h->plt.refcount = 0; | |
1213 | h->got.refcount = 0; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | ||
1218 | static void | |
1219 | elf_xtensa_hide_symbol (struct bfd_link_info *info, | |
1220 | struct elf_link_hash_entry *h, | |
1221 | bfd_boolean force_local) | |
1222 | { | |
1223 | /* For a shared link, move the plt refcount to the got refcount to leave | |
1224 | space for RELATIVE relocs. */ | |
1225 | elf_xtensa_make_sym_local (info, h); | |
1226 | ||
1227 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
1228 | } | |
1229 | ||
1230 | ||
e0001a05 NC |
1231 | /* Return the section that should be marked against GC for a given |
1232 | relocation. */ | |
1233 | ||
1234 | static asection * | |
7fa3d080 | 1235 | elf_xtensa_gc_mark_hook (asection *sec, |
07adf181 | 1236 | struct bfd_link_info *info, |
7fa3d080 BW |
1237 | Elf_Internal_Rela *rel, |
1238 | struct elf_link_hash_entry *h, | |
1239 | Elf_Internal_Sym *sym) | |
e0001a05 | 1240 | { |
e1e5c0b5 BW |
1241 | /* Property sections are marked "KEEP" in the linker scripts, but they |
1242 | should not cause other sections to be marked. (This approach relies | |
1243 | on elf_xtensa_discard_info to remove property table entries that | |
1244 | describe discarded sections. Alternatively, it might be more | |
1245 | efficient to avoid using "KEEP" in the linker scripts and instead use | |
1246 | the gc_mark_extra_sections hook to mark only the property sections | |
1247 | that describe marked sections. That alternative does not work well | |
1248 | with the current property table sections, which do not correspond | |
1249 | one-to-one with the sections they describe, but that should be fixed | |
1250 | someday.) */ | |
1251 | if (xtensa_is_property_section (sec)) | |
1252 | return NULL; | |
1253 | ||
07adf181 AM |
1254 | if (h != NULL) |
1255 | switch (ELF32_R_TYPE (rel->r_info)) | |
1256 | { | |
1257 | case R_XTENSA_GNU_VTINHERIT: | |
1258 | case R_XTENSA_GNU_VTENTRY: | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
1262 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
e0001a05 NC |
1263 | } |
1264 | ||
7fa3d080 | 1265 | |
e0001a05 NC |
1266 | /* Update the GOT & PLT entry reference counts |
1267 | for the section being removed. */ | |
1268 | ||
1269 | static bfd_boolean | |
7fa3d080 | 1270 | elf_xtensa_gc_sweep_hook (bfd *abfd, |
28dbbc02 | 1271 | struct bfd_link_info *info, |
7fa3d080 BW |
1272 | asection *sec, |
1273 | const Elf_Internal_Rela *relocs) | |
e0001a05 NC |
1274 | { |
1275 | Elf_Internal_Shdr *symtab_hdr; | |
1276 | struct elf_link_hash_entry **sym_hashes; | |
e0001a05 | 1277 | const Elf_Internal_Rela *rel, *relend; |
28dbbc02 BW |
1278 | struct elf_xtensa_link_hash_table *htab; |
1279 | ||
1280 | htab = elf_xtensa_hash_table (info); | |
e0001a05 | 1281 | |
7dda2462 TG |
1282 | if (info->relocatable) |
1283 | return TRUE; | |
1284 | ||
e0001a05 NC |
1285 | if ((sec->flags & SEC_ALLOC) == 0) |
1286 | return TRUE; | |
1287 | ||
1288 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1289 | sym_hashes = elf_sym_hashes (abfd); | |
e0001a05 NC |
1290 | |
1291 | relend = relocs + sec->reloc_count; | |
1292 | for (rel = relocs; rel < relend; rel++) | |
1293 | { | |
1294 | unsigned long r_symndx; | |
1295 | unsigned int r_type; | |
1296 | struct elf_link_hash_entry *h = NULL; | |
28dbbc02 BW |
1297 | struct elf_xtensa_link_hash_entry *eh; |
1298 | bfd_boolean is_got = FALSE; | |
1299 | bfd_boolean is_plt = FALSE; | |
1300 | bfd_boolean is_tlsfunc = FALSE; | |
e0001a05 NC |
1301 | |
1302 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1303 | if (r_symndx >= symtab_hdr->sh_info) | |
3eb128b2 AM |
1304 | { |
1305 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1306 | while (h->root.type == bfd_link_hash_indirect | |
1307 | || h->root.type == bfd_link_hash_warning) | |
1308 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1309 | } | |
28dbbc02 | 1310 | eh = elf_xtensa_hash_entry (h); |
e0001a05 NC |
1311 | |
1312 | r_type = ELF32_R_TYPE (rel->r_info); | |
1313 | switch (r_type) | |
1314 | { | |
28dbbc02 BW |
1315 | case R_XTENSA_TLSDESC_FN: |
1316 | if (info->shared) | |
1317 | { | |
1318 | is_got = TRUE; | |
1319 | is_tlsfunc = TRUE; | |
1320 | } | |
e0001a05 NC |
1321 | break; |
1322 | ||
28dbbc02 BW |
1323 | case R_XTENSA_TLSDESC_ARG: |
1324 | if (info->shared) | |
1325 | is_got = TRUE; | |
1326 | else | |
1327 | { | |
1328 | if (h && elf_xtensa_hash_entry (h) != htab->tlsbase) | |
1329 | is_got = TRUE; | |
1330 | } | |
e0001a05 NC |
1331 | break; |
1332 | ||
28dbbc02 BW |
1333 | case R_XTENSA_TLS_TPOFF: |
1334 | if (info->shared || h) | |
1335 | is_got = TRUE; | |
e0001a05 NC |
1336 | break; |
1337 | ||
28dbbc02 BW |
1338 | case R_XTENSA_32: |
1339 | is_got = TRUE; | |
e0001a05 | 1340 | break; |
28dbbc02 BW |
1341 | |
1342 | case R_XTENSA_PLT: | |
1343 | is_plt = TRUE; | |
1344 | break; | |
1345 | ||
1346 | default: | |
1347 | continue; | |
1348 | } | |
1349 | ||
1350 | if (h) | |
1351 | { | |
1352 | if (is_plt) | |
1353 | { | |
1354 | if (h->plt.refcount > 0) | |
1355 | h->plt.refcount--; | |
1356 | } | |
1357 | else if (is_got) | |
1358 | { | |
1359 | if (h->got.refcount > 0) | |
1360 | h->got.refcount--; | |
1361 | } | |
1362 | if (is_tlsfunc) | |
1363 | { | |
1364 | if (eh->tlsfunc_refcount > 0) | |
1365 | eh->tlsfunc_refcount--; | |
1366 | } | |
1367 | } | |
1368 | else | |
1369 | { | |
1370 | if (is_got || is_plt) | |
1371 | { | |
1372 | bfd_signed_vma *got_refcount | |
1373 | = &elf_local_got_refcounts (abfd) [r_symndx]; | |
1374 | if (*got_refcount > 0) | |
1375 | *got_refcount -= 1; | |
1376 | } | |
1377 | if (is_tlsfunc) | |
1378 | { | |
1379 | bfd_signed_vma *tlsfunc_refcount | |
1380 | = &elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx]; | |
1381 | if (*tlsfunc_refcount > 0) | |
1382 | *tlsfunc_refcount -= 1; | |
1383 | } | |
e0001a05 NC |
1384 | } |
1385 | } | |
1386 | ||
1387 | return TRUE; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | /* Create all the dynamic sections. */ | |
1392 | ||
1393 | static bfd_boolean | |
7fa3d080 | 1394 | elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
e0001a05 | 1395 | { |
f0e6fdb2 | 1396 | struct elf_xtensa_link_hash_table *htab; |
e901de89 | 1397 | flagword flags, noalloc_flags; |
f0e6fdb2 BW |
1398 | |
1399 | htab = elf_xtensa_hash_table (info); | |
e0001a05 NC |
1400 | |
1401 | /* First do all the standard stuff. */ | |
1402 | if (! _bfd_elf_create_dynamic_sections (dynobj, info)) | |
1403 | return FALSE; | |
f0e6fdb2 BW |
1404 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
1405 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1406 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1407 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
64e77c6d | 1408 | htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
e0001a05 NC |
1409 | |
1410 | /* Create any extra PLT sections in case check_relocs has already | |
1411 | been called on all the non-dynamic input files. */ | |
f0e6fdb2 | 1412 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1413 | return FALSE; |
1414 | ||
e901de89 BW |
1415 | noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1416 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1417 | flags = noalloc_flags | SEC_ALLOC | SEC_LOAD; | |
e0001a05 NC |
1418 | |
1419 | /* Mark the ".got.plt" section READONLY. */ | |
f0e6fdb2 BW |
1420 | if (htab->sgotplt == NULL |
1421 | || ! bfd_set_section_flags (dynobj, htab->sgotplt, flags)) | |
e0001a05 NC |
1422 | return FALSE; |
1423 | ||
e901de89 | 1424 | /* Create ".got.loc" (literal tables for use by dynamic linker). */ |
f0e6fdb2 BW |
1425 | htab->sgotloc = bfd_make_section_with_flags (dynobj, ".got.loc", flags); |
1426 | if (htab->sgotloc == NULL | |
1427 | || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2)) | |
e901de89 BW |
1428 | return FALSE; |
1429 | ||
e0001a05 | 1430 | /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */ |
f0e6fdb2 BW |
1431 | htab->spltlittbl = bfd_make_section_with_flags (dynobj, ".xt.lit.plt", |
1432 | noalloc_flags); | |
1433 | if (htab->spltlittbl == NULL | |
1434 | || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2)) | |
e0001a05 NC |
1435 | return FALSE; |
1436 | ||
1437 | return TRUE; | |
1438 | } | |
1439 | ||
1440 | ||
1441 | static bfd_boolean | |
f0e6fdb2 | 1442 | add_extra_plt_sections (struct bfd_link_info *info, int count) |
e0001a05 | 1443 | { |
f0e6fdb2 | 1444 | bfd *dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
1445 | int chunk; |
1446 | ||
1447 | /* Iterate over all chunks except 0 which uses the standard ".plt" and | |
1448 | ".got.plt" sections. */ | |
1449 | for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--) | |
1450 | { | |
1451 | char *sname; | |
1452 | flagword flags; | |
1453 | asection *s; | |
1454 | ||
1455 | /* Stop when we find a section has already been created. */ | |
f0e6fdb2 | 1456 | if (elf_xtensa_get_plt_section (info, chunk)) |
e0001a05 NC |
1457 | break; |
1458 | ||
1459 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1460 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1461 | ||
1462 | sname = (char *) bfd_malloc (10); | |
1463 | sprintf (sname, ".plt.%u", chunk); | |
ba05963f | 1464 | s = bfd_make_section_with_flags (dynobj, sname, flags | SEC_CODE); |
e0001a05 | 1465 | if (s == NULL |
e0001a05 NC |
1466 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1467 | return FALSE; | |
1468 | ||
1469 | sname = (char *) bfd_malloc (14); | |
1470 | sprintf (sname, ".got.plt.%u", chunk); | |
3496cb2a | 1471 | s = bfd_make_section_with_flags (dynobj, sname, flags); |
e0001a05 | 1472 | if (s == NULL |
e0001a05 NC |
1473 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1474 | return FALSE; | |
1475 | } | |
1476 | ||
1477 | return TRUE; | |
1478 | } | |
1479 | ||
1480 | ||
1481 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1482 | regular object. The current definition is in some section of the | |
1483 | dynamic object, but we're not including those sections. We have to | |
1484 | change the definition to something the rest of the link can | |
1485 | understand. */ | |
1486 | ||
1487 | static bfd_boolean | |
7fa3d080 BW |
1488 | elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1489 | struct elf_link_hash_entry *h) | |
e0001a05 NC |
1490 | { |
1491 | /* If this is a weak symbol, and there is a real definition, the | |
1492 | processor independent code will have arranged for us to see the | |
1493 | real definition first, and we can just use the same value. */ | |
7fa3d080 | 1494 | if (h->u.weakdef) |
e0001a05 | 1495 | { |
f6e332e6 AM |
1496 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1497 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1498 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1499 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
e0001a05 NC |
1500 | return TRUE; |
1501 | } | |
1502 | ||
1503 | /* This is a reference to a symbol defined by a dynamic object. The | |
1504 | reference must go through the GOT, so there's no need for COPY relocs, | |
1505 | .dynbss, etc. */ | |
1506 | ||
1507 | return TRUE; | |
1508 | } | |
1509 | ||
1510 | ||
e0001a05 | 1511 | static bfd_boolean |
f1ab2340 | 1512 | elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg) |
e0001a05 | 1513 | { |
f1ab2340 BW |
1514 | struct bfd_link_info *info; |
1515 | struct elf_xtensa_link_hash_table *htab; | |
28dbbc02 | 1516 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (h); |
e0001a05 | 1517 | |
f1ab2340 BW |
1518 | if (h->root.type == bfd_link_hash_indirect) |
1519 | return TRUE; | |
e0001a05 NC |
1520 | |
1521 | if (h->root.type == bfd_link_hash_warning) | |
1522 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1523 | ||
f1ab2340 BW |
1524 | info = (struct bfd_link_info *) arg; |
1525 | htab = elf_xtensa_hash_table (info); | |
e0001a05 | 1526 | |
28dbbc02 BW |
1527 | /* If we saw any use of an IE model for this symbol, we can then optimize |
1528 | away GOT entries for any TLSDESC_FN relocs. */ | |
1529 | if ((eh->tls_type & GOT_TLS_IE) != 0) | |
1530 | { | |
1531 | BFD_ASSERT (h->got.refcount >= eh->tlsfunc_refcount); | |
1532 | h->got.refcount -= eh->tlsfunc_refcount; | |
1533 | } | |
e0001a05 | 1534 | |
28dbbc02 | 1535 | if (! elf_xtensa_dynamic_symbol_p (h, info)) |
95147441 | 1536 | elf_xtensa_make_sym_local (info, h); |
e0001a05 | 1537 | |
f1ab2340 BW |
1538 | if (h->plt.refcount > 0) |
1539 | htab->srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1540 | |
1541 | if (h->got.refcount > 0) | |
f1ab2340 | 1542 | htab->srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1543 | |
1544 | return TRUE; | |
1545 | } | |
1546 | ||
1547 | ||
1548 | static void | |
f0e6fdb2 | 1549 | elf_xtensa_allocate_local_got_size (struct bfd_link_info *info) |
e0001a05 | 1550 | { |
f0e6fdb2 | 1551 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1552 | bfd *i; |
1553 | ||
f0e6fdb2 BW |
1554 | htab = elf_xtensa_hash_table (info); |
1555 | ||
e0001a05 NC |
1556 | for (i = info->input_bfds; i; i = i->link_next) |
1557 | { | |
1558 | bfd_signed_vma *local_got_refcounts; | |
1559 | bfd_size_type j, cnt; | |
1560 | Elf_Internal_Shdr *symtab_hdr; | |
1561 | ||
1562 | local_got_refcounts = elf_local_got_refcounts (i); | |
1563 | if (!local_got_refcounts) | |
1564 | continue; | |
1565 | ||
1566 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
1567 | cnt = symtab_hdr->sh_info; | |
1568 | ||
1569 | for (j = 0; j < cnt; ++j) | |
1570 | { | |
28dbbc02 BW |
1571 | /* If we saw any use of an IE model for this symbol, we can |
1572 | then optimize away GOT entries for any TLSDESC_FN relocs. */ | |
1573 | if ((elf_xtensa_local_got_tls_type (i) [j] & GOT_TLS_IE) != 0) | |
1574 | { | |
1575 | bfd_signed_vma *tlsfunc_refcount | |
1576 | = &elf_xtensa_local_tlsfunc_refcounts (i) [j]; | |
1577 | BFD_ASSERT (local_got_refcounts[j] >= *tlsfunc_refcount); | |
1578 | local_got_refcounts[j] -= *tlsfunc_refcount; | |
1579 | } | |
1580 | ||
e0001a05 | 1581 | if (local_got_refcounts[j] > 0) |
f0e6fdb2 BW |
1582 | htab->srelgot->size += (local_got_refcounts[j] |
1583 | * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1584 | } |
1585 | } | |
1586 | } | |
1587 | ||
1588 | ||
1589 | /* Set the sizes of the dynamic sections. */ | |
1590 | ||
1591 | static bfd_boolean | |
7fa3d080 BW |
1592 | elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1593 | struct bfd_link_info *info) | |
e0001a05 | 1594 | { |
f0e6fdb2 | 1595 | struct elf_xtensa_link_hash_table *htab; |
e901de89 BW |
1596 | bfd *dynobj, *abfd; |
1597 | asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc; | |
e0001a05 NC |
1598 | bfd_boolean relplt, relgot; |
1599 | int plt_entries, plt_chunks, chunk; | |
1600 | ||
1601 | plt_entries = 0; | |
1602 | plt_chunks = 0; | |
e0001a05 | 1603 | |
f0e6fdb2 | 1604 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
1605 | dynobj = elf_hash_table (info)->dynobj; |
1606 | if (dynobj == NULL) | |
1607 | abort (); | |
f0e6fdb2 BW |
1608 | srelgot = htab->srelgot; |
1609 | srelplt = htab->srelplt; | |
e0001a05 NC |
1610 | |
1611 | if (elf_hash_table (info)->dynamic_sections_created) | |
1612 | { | |
f0e6fdb2 BW |
1613 | BFD_ASSERT (htab->srelgot != NULL |
1614 | && htab->srelplt != NULL | |
1615 | && htab->sgot != NULL | |
1616 | && htab->spltlittbl != NULL | |
1617 | && htab->sgotloc != NULL); | |
1618 | ||
e0001a05 | 1619 | /* Set the contents of the .interp section to the interpreter. */ |
893c4fe2 | 1620 | if (info->executable) |
e0001a05 NC |
1621 | { |
1622 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1623 | if (s == NULL) | |
1624 | abort (); | |
eea6121a | 1625 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
e0001a05 NC |
1626 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1627 | } | |
1628 | ||
1629 | /* Allocate room for one word in ".got". */ | |
f0e6fdb2 | 1630 | htab->sgot->size = 4; |
e0001a05 | 1631 | |
f1ab2340 BW |
1632 | /* Allocate space in ".rela.got" for literals that reference global |
1633 | symbols and space in ".rela.plt" for literals that have PLT | |
1634 | entries. */ | |
e0001a05 | 1635 | elf_link_hash_traverse (elf_hash_table (info), |
f1ab2340 | 1636 | elf_xtensa_allocate_dynrelocs, |
7fa3d080 | 1637 | (void *) info); |
e0001a05 | 1638 | |
e0001a05 NC |
1639 | /* If we are generating a shared object, we also need space in |
1640 | ".rela.got" for R_XTENSA_RELATIVE relocs for literals that | |
1641 | reference local symbols. */ | |
1642 | if (info->shared) | |
f0e6fdb2 | 1643 | elf_xtensa_allocate_local_got_size (info); |
e0001a05 | 1644 | |
e0001a05 NC |
1645 | /* Allocate space in ".plt" to match the size of ".rela.plt". For |
1646 | each PLT entry, we need the PLT code plus a 4-byte literal. | |
1647 | For each chunk of ".plt", we also need two more 4-byte | |
1648 | literals, two corresponding entries in ".rela.got", and an | |
1649 | 8-byte entry in ".xt.lit.plt". */ | |
f0e6fdb2 | 1650 | spltlittbl = htab->spltlittbl; |
eea6121a | 1651 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
1652 | plt_chunks = |
1653 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
1654 | ||
1655 | /* Iterate over all the PLT chunks, including any extra sections | |
1656 | created earlier because the initial count of PLT relocations | |
1657 | was an overestimate. */ | |
1658 | for (chunk = 0; | |
f0e6fdb2 | 1659 | (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL; |
e0001a05 NC |
1660 | chunk++) |
1661 | { | |
1662 | int chunk_entries; | |
1663 | ||
f0e6fdb2 BW |
1664 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
1665 | BFD_ASSERT (sgotplt != NULL); | |
e0001a05 NC |
1666 | |
1667 | if (chunk < plt_chunks - 1) | |
1668 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
1669 | else if (chunk == plt_chunks - 1) | |
1670 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
1671 | else | |
1672 | chunk_entries = 0; | |
1673 | ||
1674 | if (chunk_entries != 0) | |
1675 | { | |
eea6121a AM |
1676 | sgotplt->size = 4 * (chunk_entries + 2); |
1677 | splt->size = PLT_ENTRY_SIZE * chunk_entries; | |
1678 | srelgot->size += 2 * sizeof (Elf32_External_Rela); | |
1679 | spltlittbl->size += 8; | |
e0001a05 NC |
1680 | } |
1681 | else | |
1682 | { | |
eea6121a AM |
1683 | sgotplt->size = 0; |
1684 | splt->size = 0; | |
e0001a05 NC |
1685 | } |
1686 | } | |
e901de89 BW |
1687 | |
1688 | /* Allocate space in ".got.loc" to match the total size of all the | |
1689 | literal tables. */ | |
f0e6fdb2 | 1690 | sgotloc = htab->sgotloc; |
eea6121a | 1691 | sgotloc->size = spltlittbl->size; |
e901de89 BW |
1692 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
1693 | { | |
1694 | if (abfd->flags & DYNAMIC) | |
1695 | continue; | |
1696 | for (s = abfd->sections; s != NULL; s = s->next) | |
1697 | { | |
b536dc1e BW |
1698 | if (! elf_discarded_section (s) |
1699 | && xtensa_is_littable_section (s) | |
1700 | && s != spltlittbl) | |
eea6121a | 1701 | sgotloc->size += s->size; |
e901de89 BW |
1702 | } |
1703 | } | |
e0001a05 NC |
1704 | } |
1705 | ||
1706 | /* Allocate memory for dynamic sections. */ | |
1707 | relplt = FALSE; | |
1708 | relgot = FALSE; | |
1709 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1710 | { | |
1711 | const char *name; | |
e0001a05 NC |
1712 | |
1713 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1714 | continue; | |
1715 | ||
1716 | /* It's OK to base decisions on the section name, because none | |
1717 | of the dynobj section names depend upon the input files. */ | |
1718 | name = bfd_get_section_name (dynobj, s); | |
1719 | ||
0112cd26 | 1720 | if (CONST_STRNEQ (name, ".rela")) |
e0001a05 | 1721 | { |
c456f082 | 1722 | if (s->size != 0) |
e0001a05 | 1723 | { |
c456f082 AM |
1724 | if (strcmp (name, ".rela.plt") == 0) |
1725 | relplt = TRUE; | |
1726 | else if (strcmp (name, ".rela.got") == 0) | |
1727 | relgot = TRUE; | |
1728 | ||
1729 | /* We use the reloc_count field as a counter if we need | |
1730 | to copy relocs into the output file. */ | |
1731 | s->reloc_count = 0; | |
e0001a05 NC |
1732 | } |
1733 | } | |
0112cd26 NC |
1734 | else if (! CONST_STRNEQ (name, ".plt.") |
1735 | && ! CONST_STRNEQ (name, ".got.plt.") | |
c456f082 | 1736 | && strcmp (name, ".got") != 0 |
e0001a05 NC |
1737 | && strcmp (name, ".plt") != 0 |
1738 | && strcmp (name, ".got.plt") != 0 | |
e901de89 BW |
1739 | && strcmp (name, ".xt.lit.plt") != 0 |
1740 | && strcmp (name, ".got.loc") != 0) | |
e0001a05 NC |
1741 | { |
1742 | /* It's not one of our sections, so don't allocate space. */ | |
1743 | continue; | |
1744 | } | |
1745 | ||
c456f082 AM |
1746 | if (s->size == 0) |
1747 | { | |
1748 | /* If we don't need this section, strip it from the output | |
1749 | file. We must create the ".plt*" and ".got.plt*" | |
1750 | sections in create_dynamic_sections and/or check_relocs | |
1751 | based on a conservative estimate of the PLT relocation | |
1752 | count, because the sections must be created before the | |
1753 | linker maps input sections to output sections. The | |
1754 | linker does that before size_dynamic_sections, where we | |
1755 | compute the exact size of the PLT, so there may be more | |
1756 | of these sections than are actually needed. */ | |
1757 | s->flags |= SEC_EXCLUDE; | |
1758 | } | |
1759 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
e0001a05 NC |
1760 | { |
1761 | /* Allocate memory for the section contents. */ | |
eea6121a | 1762 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1763 | if (s->contents == NULL) |
e0001a05 NC |
1764 | return FALSE; |
1765 | } | |
1766 | } | |
1767 | ||
1768 | if (elf_hash_table (info)->dynamic_sections_created) | |
1769 | { | |
1770 | /* Add the special XTENSA_RTLD relocations now. The offsets won't be | |
1771 | known until finish_dynamic_sections, but we need to get the relocs | |
1772 | in place before they are sorted. */ | |
e0001a05 NC |
1773 | for (chunk = 0; chunk < plt_chunks; chunk++) |
1774 | { | |
1775 | Elf_Internal_Rela irela; | |
1776 | bfd_byte *loc; | |
1777 | ||
1778 | irela.r_offset = 0; | |
1779 | irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD); | |
1780 | irela.r_addend = 0; | |
1781 | ||
1782 | loc = (srelgot->contents | |
1783 | + srelgot->reloc_count * sizeof (Elf32_External_Rela)); | |
1784 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
1785 | bfd_elf32_swap_reloca_out (output_bfd, &irela, | |
1786 | loc + sizeof (Elf32_External_Rela)); | |
1787 | srelgot->reloc_count += 2; | |
1788 | } | |
1789 | ||
1790 | /* Add some entries to the .dynamic section. We fill in the | |
1791 | values later, in elf_xtensa_finish_dynamic_sections, but we | |
1792 | must add the entries now so that we get the correct size for | |
1793 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1794 | dynamic linker and used by the debugger. */ | |
1795 | #define add_dynamic_entry(TAG, VAL) \ | |
5a580b3a | 1796 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
e0001a05 | 1797 | |
ba05963f | 1798 | if (info->executable) |
e0001a05 NC |
1799 | { |
1800 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1801 | return FALSE; | |
1802 | } | |
1803 | ||
1804 | if (relplt) | |
1805 | { | |
c243ad3b | 1806 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
e0001a05 NC |
1807 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
1808 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1809 | return FALSE; | |
1810 | } | |
1811 | ||
1812 | if (relgot) | |
1813 | { | |
1814 | if (!add_dynamic_entry (DT_RELA, 0) | |
1815 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1816 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
1817 | return FALSE; | |
1818 | } | |
1819 | ||
c243ad3b BW |
1820 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1821 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0) | |
e0001a05 NC |
1822 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0)) |
1823 | return FALSE; | |
1824 | } | |
1825 | #undef add_dynamic_entry | |
1826 | ||
1827 | return TRUE; | |
1828 | } | |
1829 | ||
28dbbc02 BW |
1830 | static bfd_boolean |
1831 | elf_xtensa_always_size_sections (bfd *output_bfd, | |
1832 | struct bfd_link_info *info) | |
1833 | { | |
1834 | struct elf_xtensa_link_hash_table *htab; | |
1835 | asection *tls_sec; | |
1836 | ||
1837 | htab = elf_xtensa_hash_table (info); | |
1838 | tls_sec = htab->elf.tls_sec; | |
1839 | ||
1840 | if (tls_sec && (htab->tlsbase->tls_type & GOT_TLS_ANY) != 0) | |
1841 | { | |
1842 | struct elf_link_hash_entry *tlsbase = &htab->tlsbase->elf; | |
1843 | struct bfd_link_hash_entry *bh = &tlsbase->root; | |
1844 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
1845 | ||
1846 | tlsbase->type = STT_TLS; | |
1847 | if (!(_bfd_generic_link_add_one_symbol | |
1848 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1849 | tls_sec, 0, NULL, FALSE, | |
1850 | bed->collect, &bh))) | |
1851 | return FALSE; | |
1852 | tlsbase->def_regular = 1; | |
1853 | tlsbase->other = STV_HIDDEN; | |
1854 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1855 | } | |
1856 | ||
1857 | return TRUE; | |
1858 | } | |
1859 | ||
e0001a05 | 1860 | \f |
28dbbc02 BW |
1861 | /* Return the base VMA address which should be subtracted from real addresses |
1862 | when resolving @dtpoff relocation. | |
1863 | This is PT_TLS segment p_vaddr. */ | |
1864 | ||
1865 | static bfd_vma | |
1866 | dtpoff_base (struct bfd_link_info *info) | |
1867 | { | |
1868 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1869 | if (elf_hash_table (info)->tls_sec == NULL) | |
1870 | return 0; | |
1871 | return elf_hash_table (info)->tls_sec->vma; | |
1872 | } | |
1873 | ||
1874 | /* Return the relocation value for @tpoff relocation | |
1875 | if STT_TLS virtual address is ADDRESS. */ | |
1876 | ||
1877 | static bfd_vma | |
1878 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
1879 | { | |
1880 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
1881 | bfd_vma base; | |
1882 | ||
1883 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1884 | if (htab->tls_sec == NULL) | |
1885 | return 0; | |
1886 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); | |
1887 | return address - htab->tls_sec->vma + base; | |
1888 | } | |
1889 | ||
e0001a05 NC |
1890 | /* Perform the specified relocation. The instruction at (contents + address) |
1891 | is modified to set one operand to represent the value in "relocation". The | |
1892 | operand position is determined by the relocation type recorded in the | |
1893 | howto. */ | |
1894 | ||
1895 | #define CALL_SEGMENT_BITS (30) | |
7fa3d080 | 1896 | #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS) |
e0001a05 NC |
1897 | |
1898 | static bfd_reloc_status_type | |
7fa3d080 BW |
1899 | elf_xtensa_do_reloc (reloc_howto_type *howto, |
1900 | bfd *abfd, | |
1901 | asection *input_section, | |
1902 | bfd_vma relocation, | |
1903 | bfd_byte *contents, | |
1904 | bfd_vma address, | |
1905 | bfd_boolean is_weak_undef, | |
1906 | char **error_message) | |
e0001a05 | 1907 | { |
43cd72b9 | 1908 | xtensa_format fmt; |
e0001a05 | 1909 | xtensa_opcode opcode; |
e0001a05 | 1910 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
1911 | static xtensa_insnbuf ibuff = NULL; |
1912 | static xtensa_insnbuf sbuff = NULL; | |
1bbb5f21 | 1913 | bfd_vma self_address; |
43cd72b9 BW |
1914 | bfd_size_type input_size; |
1915 | int opnd, slot; | |
e0001a05 NC |
1916 | uint32 newval; |
1917 | ||
43cd72b9 BW |
1918 | if (!ibuff) |
1919 | { | |
1920 | ibuff = xtensa_insnbuf_alloc (isa); | |
1921 | sbuff = xtensa_insnbuf_alloc (isa); | |
1922 | } | |
1923 | ||
1924 | input_size = bfd_get_section_limit (abfd, input_section); | |
1925 | ||
1bbb5f21 BW |
1926 | /* Calculate the PC address for this instruction. */ |
1927 | self_address = (input_section->output_section->vma | |
1928 | + input_section->output_offset | |
1929 | + address); | |
1930 | ||
e0001a05 NC |
1931 | switch (howto->type) |
1932 | { | |
1933 | case R_XTENSA_NONE: | |
43cd72b9 BW |
1934 | case R_XTENSA_DIFF8: |
1935 | case R_XTENSA_DIFF16: | |
1936 | case R_XTENSA_DIFF32: | |
28dbbc02 BW |
1937 | case R_XTENSA_TLS_FUNC: |
1938 | case R_XTENSA_TLS_ARG: | |
1939 | case R_XTENSA_TLS_CALL: | |
e0001a05 NC |
1940 | return bfd_reloc_ok; |
1941 | ||
1942 | case R_XTENSA_ASM_EXPAND: | |
1943 | if (!is_weak_undef) | |
1944 | { | |
1945 | /* Check for windowed CALL across a 1GB boundary. */ | |
91d6fa6a NC |
1946 | opcode = get_expanded_call_opcode (contents + address, |
1947 | input_size - address, 0); | |
e0001a05 NC |
1948 | if (is_windowed_call_opcode (opcode)) |
1949 | { | |
43cd72b9 BW |
1950 | if ((self_address >> CALL_SEGMENT_BITS) |
1951 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 NC |
1952 | { |
1953 | *error_message = "windowed longcall crosses 1GB boundary; " | |
1954 | "return may fail"; | |
1955 | return bfd_reloc_dangerous; | |
1956 | } | |
1957 | } | |
1958 | } | |
1959 | return bfd_reloc_ok; | |
1960 | ||
1961 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 | 1962 | { |
e0001a05 | 1963 | /* Convert the L32R/CALLX to CALL. */ |
43cd72b9 BW |
1964 | bfd_reloc_status_type retval = |
1965 | elf_xtensa_do_asm_simplify (contents, address, input_size, | |
1966 | error_message); | |
e0001a05 | 1967 | if (retval != bfd_reloc_ok) |
43cd72b9 | 1968 | return bfd_reloc_dangerous; |
e0001a05 NC |
1969 | |
1970 | /* The CALL needs to be relocated. Continue below for that part. */ | |
1971 | address += 3; | |
c46082c8 | 1972 | self_address += 3; |
43cd72b9 | 1973 | howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ]; |
e0001a05 NC |
1974 | } |
1975 | break; | |
1976 | ||
1977 | case R_XTENSA_32: | |
e0001a05 NC |
1978 | { |
1979 | bfd_vma x; | |
1980 | x = bfd_get_32 (abfd, contents + address); | |
1981 | x = x + relocation; | |
1982 | bfd_put_32 (abfd, x, contents + address); | |
1983 | } | |
1984 | return bfd_reloc_ok; | |
1bbb5f21 BW |
1985 | |
1986 | case R_XTENSA_32_PCREL: | |
1987 | bfd_put_32 (abfd, relocation - self_address, contents + address); | |
1988 | return bfd_reloc_ok; | |
28dbbc02 BW |
1989 | |
1990 | case R_XTENSA_PLT: | |
1991 | case R_XTENSA_TLSDESC_FN: | |
1992 | case R_XTENSA_TLSDESC_ARG: | |
1993 | case R_XTENSA_TLS_DTPOFF: | |
1994 | case R_XTENSA_TLS_TPOFF: | |
1995 | bfd_put_32 (abfd, relocation, contents + address); | |
1996 | return bfd_reloc_ok; | |
e0001a05 NC |
1997 | } |
1998 | ||
43cd72b9 BW |
1999 | /* Only instruction slot-specific relocations handled below.... */ |
2000 | slot = get_relocation_slot (howto->type); | |
2001 | if (slot == XTENSA_UNDEFINED) | |
e0001a05 | 2002 | { |
43cd72b9 | 2003 | *error_message = "unexpected relocation"; |
e0001a05 NC |
2004 | return bfd_reloc_dangerous; |
2005 | } | |
2006 | ||
43cd72b9 BW |
2007 | /* Read the instruction into a buffer and decode the opcode. */ |
2008 | xtensa_insnbuf_from_chars (isa, ibuff, contents + address, | |
2009 | input_size - address); | |
2010 | fmt = xtensa_format_decode (isa, ibuff); | |
2011 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 2012 | { |
43cd72b9 | 2013 | *error_message = "cannot decode instruction format"; |
e0001a05 NC |
2014 | return bfd_reloc_dangerous; |
2015 | } | |
2016 | ||
43cd72b9 | 2017 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); |
e0001a05 | 2018 | |
43cd72b9 BW |
2019 | opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff); |
2020 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 2021 | { |
43cd72b9 | 2022 | *error_message = "cannot decode instruction opcode"; |
e0001a05 NC |
2023 | return bfd_reloc_dangerous; |
2024 | } | |
2025 | ||
43cd72b9 BW |
2026 | /* Check for opcode-specific "alternate" relocations. */ |
2027 | if (is_alt_relocation (howto->type)) | |
2028 | { | |
2029 | if (opcode == get_l32r_opcode ()) | |
2030 | { | |
2031 | /* Handle the special-case of non-PC-relative L32R instructions. */ | |
2032 | bfd *output_bfd = input_section->output_section->owner; | |
2033 | asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4"); | |
2034 | if (!lit4_sec) | |
2035 | { | |
2036 | *error_message = "relocation references missing .lit4 section"; | |
2037 | return bfd_reloc_dangerous; | |
2038 | } | |
2039 | self_address = ((lit4_sec->vma & ~0xfff) | |
2040 | + 0x40000 - 3); /* -3 to compensate for do_reloc */ | |
2041 | newval = relocation; | |
2042 | opnd = 1; | |
2043 | } | |
2044 | else if (opcode == get_const16_opcode ()) | |
2045 | { | |
2046 | /* ALT used for high 16 bits. */ | |
2047 | newval = relocation >> 16; | |
2048 | opnd = 1; | |
2049 | } | |
2050 | else | |
2051 | { | |
2052 | /* No other "alternate" relocations currently defined. */ | |
2053 | *error_message = "unexpected relocation"; | |
2054 | return bfd_reloc_dangerous; | |
2055 | } | |
2056 | } | |
2057 | else /* Not an "alternate" relocation.... */ | |
2058 | { | |
2059 | if (opcode == get_const16_opcode ()) | |
2060 | { | |
2061 | newval = relocation & 0xffff; | |
2062 | opnd = 1; | |
2063 | } | |
2064 | else | |
2065 | { | |
2066 | /* ...normal PC-relative relocation.... */ | |
2067 | ||
2068 | /* Determine which operand is being relocated. */ | |
2069 | opnd = get_relocation_opnd (opcode, howto->type); | |
2070 | if (opnd == XTENSA_UNDEFINED) | |
2071 | { | |
2072 | *error_message = "unexpected relocation"; | |
2073 | return bfd_reloc_dangerous; | |
2074 | } | |
2075 | ||
2076 | if (!howto->pc_relative) | |
2077 | { | |
2078 | *error_message = "expected PC-relative relocation"; | |
2079 | return bfd_reloc_dangerous; | |
2080 | } | |
e0001a05 | 2081 | |
43cd72b9 BW |
2082 | newval = relocation; |
2083 | } | |
2084 | } | |
e0001a05 | 2085 | |
43cd72b9 BW |
2086 | /* Apply the relocation. */ |
2087 | if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address) | |
2088 | || xtensa_operand_encode (isa, opcode, opnd, &newval) | |
2089 | || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot, | |
2090 | sbuff, newval)) | |
e0001a05 | 2091 | { |
2db662be BW |
2092 | const char *opname = xtensa_opcode_name (isa, opcode); |
2093 | const char *msg; | |
2094 | ||
2095 | msg = "cannot encode"; | |
2096 | if (is_direct_call_opcode (opcode)) | |
2097 | { | |
2098 | if ((relocation & 0x3) != 0) | |
2099 | msg = "misaligned call target"; | |
2100 | else | |
2101 | msg = "call target out of range"; | |
2102 | } | |
2103 | else if (opcode == get_l32r_opcode ()) | |
2104 | { | |
2105 | if ((relocation & 0x3) != 0) | |
2106 | msg = "misaligned literal target"; | |
2107 | else if (is_alt_relocation (howto->type)) | |
2108 | msg = "literal target out of range (too many literals)"; | |
2109 | else if (self_address > relocation) | |
2110 | msg = "literal target out of range (try using text-section-literals)"; | |
2111 | else | |
2112 | msg = "literal placed after use"; | |
2113 | } | |
2114 | ||
2115 | *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg); | |
e0001a05 NC |
2116 | return bfd_reloc_dangerous; |
2117 | } | |
2118 | ||
43cd72b9 | 2119 | /* Check for calls across 1GB boundaries. */ |
e0001a05 NC |
2120 | if (is_direct_call_opcode (opcode) |
2121 | && is_windowed_call_opcode (opcode)) | |
2122 | { | |
43cd72b9 BW |
2123 | if ((self_address >> CALL_SEGMENT_BITS) |
2124 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 | 2125 | { |
43cd72b9 BW |
2126 | *error_message = |
2127 | "windowed call crosses 1GB boundary; return may fail"; | |
e0001a05 NC |
2128 | return bfd_reloc_dangerous; |
2129 | } | |
2130 | } | |
2131 | ||
43cd72b9 BW |
2132 | /* Write the modified instruction back out of the buffer. */ |
2133 | xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff); | |
2134 | xtensa_insnbuf_to_chars (isa, ibuff, contents + address, | |
2135 | input_size - address); | |
e0001a05 NC |
2136 | return bfd_reloc_ok; |
2137 | } | |
2138 | ||
2139 | ||
2db662be | 2140 | static char * |
7fa3d080 | 2141 | vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...) |
e0001a05 NC |
2142 | { |
2143 | /* To reduce the size of the memory leak, | |
2144 | we only use a single message buffer. */ | |
2145 | static bfd_size_type alloc_size = 0; | |
2146 | static char *message = NULL; | |
2147 | bfd_size_type orig_len, len = 0; | |
2148 | bfd_boolean is_append; | |
2149 | ||
2150 | VA_OPEN (ap, arglen); | |
2151 | VA_FIXEDARG (ap, const char *, origmsg); | |
2152 | ||
2153 | is_append = (origmsg == message); | |
2154 | ||
2155 | orig_len = strlen (origmsg); | |
2156 | len = orig_len + strlen (fmt) + arglen + 20; | |
2157 | if (len > alloc_size) | |
2158 | { | |
515ef31d | 2159 | message = (char *) bfd_realloc_or_free (message, len); |
e0001a05 NC |
2160 | alloc_size = len; |
2161 | } | |
515ef31d NC |
2162 | if (message != NULL) |
2163 | { | |
2164 | if (!is_append) | |
2165 | memcpy (message, origmsg, orig_len); | |
2166 | vsprintf (message + orig_len, fmt, ap); | |
2167 | } | |
e0001a05 NC |
2168 | VA_CLOSE (ap); |
2169 | return message; | |
2170 | } | |
2171 | ||
2172 | ||
e0001a05 NC |
2173 | /* This function is registered as the "special_function" in the |
2174 | Xtensa howto for handling simplify operations. | |
2175 | bfd_perform_relocation / bfd_install_relocation use it to | |
2176 | perform (install) the specified relocation. Since this replaces the code | |
2177 | in bfd_perform_relocation, it is basically an Xtensa-specific, | |
2178 | stripped-down version of bfd_perform_relocation. */ | |
2179 | ||
2180 | static bfd_reloc_status_type | |
7fa3d080 BW |
2181 | bfd_elf_xtensa_reloc (bfd *abfd, |
2182 | arelent *reloc_entry, | |
2183 | asymbol *symbol, | |
2184 | void *data, | |
2185 | asection *input_section, | |
2186 | bfd *output_bfd, | |
2187 | char **error_message) | |
e0001a05 NC |
2188 | { |
2189 | bfd_vma relocation; | |
2190 | bfd_reloc_status_type flag; | |
2191 | bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
2192 | bfd_vma output_base = 0; | |
2193 | reloc_howto_type *howto = reloc_entry->howto; | |
2194 | asection *reloc_target_output_section; | |
2195 | bfd_boolean is_weak_undef; | |
2196 | ||
dd1a320b BW |
2197 | if (!xtensa_default_isa) |
2198 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
2199 | ||
1049f94e | 2200 | /* ELF relocs are against symbols. If we are producing relocatable |
e0001a05 NC |
2201 | output, and the reloc is against an external symbol, the resulting |
2202 | reloc will also be against the same symbol. In such a case, we | |
2203 | don't want to change anything about the way the reloc is handled, | |
2204 | since it will all be done at final link time. This test is similar | |
2205 | to what bfd_elf_generic_reloc does except that it lets relocs with | |
2206 | howto->partial_inplace go through even if the addend is non-zero. | |
2207 | (The real problem is that partial_inplace is set for XTENSA_32 | |
2208 | relocs to begin with, but that's a long story and there's little we | |
2209 | can do about it now....) */ | |
2210 | ||
7fa3d080 | 2211 | if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0) |
e0001a05 NC |
2212 | { |
2213 | reloc_entry->address += input_section->output_offset; | |
2214 | return bfd_reloc_ok; | |
2215 | } | |
2216 | ||
2217 | /* Is the address of the relocation really within the section? */ | |
07515404 | 2218 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
e0001a05 NC |
2219 | return bfd_reloc_outofrange; |
2220 | ||
4cc11e76 | 2221 | /* Work out which section the relocation is targeted at and the |
e0001a05 NC |
2222 | initial relocation command value. */ |
2223 | ||
2224 | /* Get symbol value. (Common symbols are special.) */ | |
2225 | if (bfd_is_com_section (symbol->section)) | |
2226 | relocation = 0; | |
2227 | else | |
2228 | relocation = symbol->value; | |
2229 | ||
2230 | reloc_target_output_section = symbol->section->output_section; | |
2231 | ||
2232 | /* Convert input-section-relative symbol value to absolute. */ | |
2233 | if ((output_bfd && !howto->partial_inplace) | |
2234 | || reloc_target_output_section == NULL) | |
2235 | output_base = 0; | |
2236 | else | |
2237 | output_base = reloc_target_output_section->vma; | |
2238 | ||
2239 | relocation += output_base + symbol->section->output_offset; | |
2240 | ||
2241 | /* Add in supplied addend. */ | |
2242 | relocation += reloc_entry->addend; | |
2243 | ||
2244 | /* Here the variable relocation holds the final address of the | |
2245 | symbol we are relocating against, plus any addend. */ | |
2246 | if (output_bfd) | |
2247 | { | |
2248 | if (!howto->partial_inplace) | |
2249 | { | |
2250 | /* This is a partial relocation, and we want to apply the relocation | |
2251 | to the reloc entry rather than the raw data. Everything except | |
2252 | relocations against section symbols has already been handled | |
2253 | above. */ | |
43cd72b9 | 2254 | |
e0001a05 NC |
2255 | BFD_ASSERT (symbol->flags & BSF_SECTION_SYM); |
2256 | reloc_entry->addend = relocation; | |
2257 | reloc_entry->address += input_section->output_offset; | |
2258 | return bfd_reloc_ok; | |
2259 | } | |
2260 | else | |
2261 | { | |
2262 | reloc_entry->address += input_section->output_offset; | |
2263 | reloc_entry->addend = 0; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | is_weak_undef = (bfd_is_und_section (symbol->section) | |
2268 | && (symbol->flags & BSF_WEAK) != 0); | |
2269 | flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation, | |
2270 | (bfd_byte *) data, (bfd_vma) octets, | |
2271 | is_weak_undef, error_message); | |
2272 | ||
2273 | if (flag == bfd_reloc_dangerous) | |
2274 | { | |
2275 | /* Add the symbol name to the error message. */ | |
2276 | if (! *error_message) | |
2277 | *error_message = ""; | |
2278 | *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)", | |
2279 | strlen (symbol->name) + 17, | |
70961b9d AM |
2280 | symbol->name, |
2281 | (unsigned long) reloc_entry->addend); | |
e0001a05 NC |
2282 | } |
2283 | ||
2284 | return flag; | |
2285 | } | |
2286 | ||
2287 | ||
2288 | /* Set up an entry in the procedure linkage table. */ | |
2289 | ||
2290 | static bfd_vma | |
f0e6fdb2 | 2291 | elf_xtensa_create_plt_entry (struct bfd_link_info *info, |
7fa3d080 BW |
2292 | bfd *output_bfd, |
2293 | unsigned reloc_index) | |
e0001a05 NC |
2294 | { |
2295 | asection *splt, *sgotplt; | |
2296 | bfd_vma plt_base, got_base; | |
2297 | bfd_vma code_offset, lit_offset; | |
2298 | int chunk; | |
2299 | ||
2300 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
2301 | splt = elf_xtensa_get_plt_section (info, chunk); |
2302 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
2303 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
2304 | ||
2305 | plt_base = splt->output_section->vma + splt->output_offset; | |
2306 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
2307 | ||
2308 | lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4; | |
2309 | code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE; | |
2310 | ||
2311 | /* Fill in the literal entry. This is the offset of the dynamic | |
2312 | relocation entry. */ | |
2313 | bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela), | |
2314 | sgotplt->contents + lit_offset); | |
2315 | ||
2316 | /* Fill in the entry in the procedure linkage table. */ | |
2317 | memcpy (splt->contents + code_offset, | |
2318 | (bfd_big_endian (output_bfd) | |
2319 | ? elf_xtensa_be_plt_entry | |
2320 | : elf_xtensa_le_plt_entry), | |
2321 | PLT_ENTRY_SIZE); | |
2322 | bfd_put_16 (output_bfd, l32r_offset (got_base + 0, | |
2323 | plt_base + code_offset + 3), | |
2324 | splt->contents + code_offset + 4); | |
2325 | bfd_put_16 (output_bfd, l32r_offset (got_base + 4, | |
2326 | plt_base + code_offset + 6), | |
2327 | splt->contents + code_offset + 7); | |
2328 | bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset, | |
2329 | plt_base + code_offset + 9), | |
2330 | splt->contents + code_offset + 10); | |
2331 | ||
2332 | return plt_base + code_offset; | |
2333 | } | |
2334 | ||
2335 | ||
28dbbc02 BW |
2336 | static bfd_boolean get_indirect_call_dest_reg (xtensa_opcode, unsigned *); |
2337 | ||
2338 | static bfd_boolean | |
2339 | replace_tls_insn (Elf_Internal_Rela *rel, | |
2340 | bfd *abfd, | |
2341 | asection *input_section, | |
2342 | bfd_byte *contents, | |
2343 | bfd_boolean is_ld_model, | |
2344 | char **error_message) | |
2345 | { | |
2346 | static xtensa_insnbuf ibuff = NULL; | |
2347 | static xtensa_insnbuf sbuff = NULL; | |
2348 | xtensa_isa isa = xtensa_default_isa; | |
2349 | xtensa_format fmt; | |
2350 | xtensa_opcode old_op, new_op; | |
2351 | bfd_size_type input_size; | |
2352 | int r_type; | |
2353 | unsigned dest_reg, src_reg; | |
2354 | ||
2355 | if (ibuff == NULL) | |
2356 | { | |
2357 | ibuff = xtensa_insnbuf_alloc (isa); | |
2358 | sbuff = xtensa_insnbuf_alloc (isa); | |
2359 | } | |
2360 | ||
2361 | input_size = bfd_get_section_limit (abfd, input_section); | |
2362 | ||
2363 | /* Read the instruction into a buffer and decode the opcode. */ | |
2364 | xtensa_insnbuf_from_chars (isa, ibuff, contents + rel->r_offset, | |
2365 | input_size - rel->r_offset); | |
2366 | fmt = xtensa_format_decode (isa, ibuff); | |
2367 | if (fmt == XTENSA_UNDEFINED) | |
2368 | { | |
2369 | *error_message = "cannot decode instruction format"; | |
2370 | return FALSE; | |
2371 | } | |
2372 | ||
2373 | BFD_ASSERT (xtensa_format_num_slots (isa, fmt) == 1); | |
2374 | xtensa_format_get_slot (isa, fmt, 0, ibuff, sbuff); | |
2375 | ||
2376 | old_op = xtensa_opcode_decode (isa, fmt, 0, sbuff); | |
2377 | if (old_op == XTENSA_UNDEFINED) | |
2378 | { | |
2379 | *error_message = "cannot decode instruction opcode"; | |
2380 | return FALSE; | |
2381 | } | |
2382 | ||
2383 | r_type = ELF32_R_TYPE (rel->r_info); | |
2384 | switch (r_type) | |
2385 | { | |
2386 | case R_XTENSA_TLS_FUNC: | |
2387 | case R_XTENSA_TLS_ARG: | |
2388 | if (old_op != get_l32r_opcode () | |
2389 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2390 | sbuff, &dest_reg) != 0) | |
2391 | { | |
2392 | *error_message = "cannot extract L32R destination for TLS access"; | |
2393 | return FALSE; | |
2394 | } | |
2395 | break; | |
2396 | ||
2397 | case R_XTENSA_TLS_CALL: | |
2398 | if (! get_indirect_call_dest_reg (old_op, &dest_reg) | |
2399 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2400 | sbuff, &src_reg) != 0) | |
2401 | { | |
2402 | *error_message = "cannot extract CALLXn operands for TLS access"; | |
2403 | return FALSE; | |
2404 | } | |
2405 | break; | |
2406 | ||
2407 | default: | |
2408 | abort (); | |
2409 | } | |
2410 | ||
2411 | if (is_ld_model) | |
2412 | { | |
2413 | switch (r_type) | |
2414 | { | |
2415 | case R_XTENSA_TLS_FUNC: | |
2416 | case R_XTENSA_TLS_ARG: | |
2417 | /* Change the instruction to a NOP (or "OR a1, a1, a1" for older | |
2418 | versions of Xtensa). */ | |
2419 | new_op = xtensa_opcode_lookup (isa, "nop"); | |
2420 | if (new_op == XTENSA_UNDEFINED) | |
2421 | { | |
2422 | new_op = xtensa_opcode_lookup (isa, "or"); | |
2423 | if (new_op == XTENSA_UNDEFINED | |
2424 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2425 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2426 | sbuff, 1) != 0 | |
2427 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2428 | sbuff, 1) != 0 | |
2429 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2430 | sbuff, 1) != 0) | |
2431 | { | |
2432 | *error_message = "cannot encode OR for TLS access"; | |
2433 | return FALSE; | |
2434 | } | |
2435 | } | |
2436 | else | |
2437 | { | |
2438 | if (xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0) | |
2439 | { | |
2440 | *error_message = "cannot encode NOP for TLS access"; | |
2441 | return FALSE; | |
2442 | } | |
2443 | } | |
2444 | break; | |
2445 | ||
2446 | case R_XTENSA_TLS_CALL: | |
2447 | /* Read THREADPTR into the CALLX's return value register. */ | |
2448 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2449 | if (new_op == XTENSA_UNDEFINED | |
2450 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2451 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2452 | sbuff, dest_reg + 2) != 0) | |
2453 | { | |
2454 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2455 | return FALSE; | |
2456 | } | |
2457 | break; | |
2458 | } | |
2459 | } | |
2460 | else | |
2461 | { | |
2462 | switch (r_type) | |
2463 | { | |
2464 | case R_XTENSA_TLS_FUNC: | |
2465 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2466 | if (new_op == XTENSA_UNDEFINED | |
2467 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2468 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2469 | sbuff, dest_reg) != 0) | |
2470 | { | |
2471 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2472 | return FALSE; | |
2473 | } | |
2474 | break; | |
2475 | ||
2476 | case R_XTENSA_TLS_ARG: | |
2477 | /* Nothing to do. Keep the original L32R instruction. */ | |
2478 | return TRUE; | |
2479 | ||
2480 | case R_XTENSA_TLS_CALL: | |
2481 | /* Add the CALLX's src register (holding the THREADPTR value) | |
2482 | to the first argument register (holding the offset) and put | |
2483 | the result in the CALLX's return value register. */ | |
2484 | new_op = xtensa_opcode_lookup (isa, "add"); | |
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 + 2) != 0 | |
2489 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2490 | sbuff, dest_reg + 2) != 0 | |
2491 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2492 | sbuff, src_reg) != 0) | |
2493 | { | |
2494 | *error_message = "cannot encode ADD for TLS access"; | |
2495 | return FALSE; | |
2496 | } | |
2497 | break; | |
2498 | } | |
2499 | } | |
2500 | ||
2501 | xtensa_format_set_slot (isa, fmt, 0, ibuff, sbuff); | |
2502 | xtensa_insnbuf_to_chars (isa, ibuff, contents + rel->r_offset, | |
2503 | input_size - rel->r_offset); | |
2504 | ||
2505 | return TRUE; | |
2506 | } | |
2507 | ||
2508 | ||
2509 | #define IS_XTENSA_TLS_RELOC(R_TYPE) \ | |
2510 | ((R_TYPE) == R_XTENSA_TLSDESC_FN \ | |
2511 | || (R_TYPE) == R_XTENSA_TLSDESC_ARG \ | |
2512 | || (R_TYPE) == R_XTENSA_TLS_DTPOFF \ | |
2513 | || (R_TYPE) == R_XTENSA_TLS_TPOFF \ | |
2514 | || (R_TYPE) == R_XTENSA_TLS_FUNC \ | |
2515 | || (R_TYPE) == R_XTENSA_TLS_ARG \ | |
2516 | || (R_TYPE) == R_XTENSA_TLS_CALL) | |
2517 | ||
e0001a05 | 2518 | /* Relocate an Xtensa ELF section. This is invoked by the linker for |
1049f94e | 2519 | both relocatable and final links. */ |
e0001a05 NC |
2520 | |
2521 | static bfd_boolean | |
7fa3d080 BW |
2522 | elf_xtensa_relocate_section (bfd *output_bfd, |
2523 | struct bfd_link_info *info, | |
2524 | bfd *input_bfd, | |
2525 | asection *input_section, | |
2526 | bfd_byte *contents, | |
2527 | Elf_Internal_Rela *relocs, | |
2528 | Elf_Internal_Sym *local_syms, | |
2529 | asection **local_sections) | |
e0001a05 | 2530 | { |
f0e6fdb2 | 2531 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
2532 | Elf_Internal_Shdr *symtab_hdr; |
2533 | Elf_Internal_Rela *rel; | |
2534 | Elf_Internal_Rela *relend; | |
2535 | struct elf_link_hash_entry **sym_hashes; | |
88d65ad6 BW |
2536 | property_table_entry *lit_table = 0; |
2537 | int ltblsize = 0; | |
28dbbc02 | 2538 | char *local_got_tls_types; |
e0001a05 | 2539 | char *error_message = NULL; |
43cd72b9 | 2540 | bfd_size_type input_size; |
28dbbc02 | 2541 | int tls_type; |
e0001a05 | 2542 | |
43cd72b9 BW |
2543 | if (!xtensa_default_isa) |
2544 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 2545 | |
28dbbc02 BW |
2546 | BFD_ASSERT (is_xtensa_elf (input_bfd)); |
2547 | ||
f0e6fdb2 | 2548 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
2549 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2550 | sym_hashes = elf_sym_hashes (input_bfd); | |
28dbbc02 | 2551 | local_got_tls_types = elf_xtensa_local_got_tls_type (input_bfd); |
e0001a05 | 2552 | |
88d65ad6 BW |
2553 | if (elf_hash_table (info)->dynamic_sections_created) |
2554 | { | |
2555 | ltblsize = xtensa_read_table_entries (input_bfd, input_section, | |
43cd72b9 BW |
2556 | &lit_table, XTENSA_LIT_SEC_NAME, |
2557 | TRUE); | |
88d65ad6 BW |
2558 | if (ltblsize < 0) |
2559 | return FALSE; | |
2560 | } | |
2561 | ||
43cd72b9 BW |
2562 | input_size = bfd_get_section_limit (input_bfd, input_section); |
2563 | ||
e0001a05 NC |
2564 | rel = relocs; |
2565 | relend = relocs + input_section->reloc_count; | |
2566 | for (; rel < relend; rel++) | |
2567 | { | |
2568 | int r_type; | |
2569 | reloc_howto_type *howto; | |
2570 | unsigned long r_symndx; | |
2571 | struct elf_link_hash_entry *h; | |
2572 | Elf_Internal_Sym *sym; | |
28dbbc02 BW |
2573 | char sym_type; |
2574 | const char *name; | |
e0001a05 NC |
2575 | asection *sec; |
2576 | bfd_vma relocation; | |
2577 | bfd_reloc_status_type r; | |
2578 | bfd_boolean is_weak_undef; | |
2579 | bfd_boolean unresolved_reloc; | |
9b8c98a4 | 2580 | bfd_boolean warned; |
28dbbc02 | 2581 | bfd_boolean dynamic_symbol; |
e0001a05 NC |
2582 | |
2583 | r_type = ELF32_R_TYPE (rel->r_info); | |
2584 | if (r_type == (int) R_XTENSA_GNU_VTINHERIT | |
2585 | || r_type == (int) R_XTENSA_GNU_VTENTRY) | |
2586 | continue; | |
2587 | ||
2588 | if (r_type < 0 || r_type >= (int) R_XTENSA_max) | |
2589 | { | |
2590 | bfd_set_error (bfd_error_bad_value); | |
2591 | return FALSE; | |
2592 | } | |
2593 | howto = &elf_howto_table[r_type]; | |
2594 | ||
2595 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2596 | ||
ab96bf03 AM |
2597 | h = NULL; |
2598 | sym = NULL; | |
2599 | sec = NULL; | |
2600 | is_weak_undef = FALSE; | |
2601 | unresolved_reloc = FALSE; | |
2602 | warned = FALSE; | |
2603 | ||
2604 | if (howto->partial_inplace && !info->relocatable) | |
2605 | { | |
2606 | /* Because R_XTENSA_32 was made partial_inplace to fix some | |
2607 | problems with DWARF info in partial links, there may be | |
2608 | an addend stored in the contents. Take it out of there | |
2609 | and move it back into the addend field of the reloc. */ | |
2610 | rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2611 | bfd_put_32 (input_bfd, 0, contents + rel->r_offset); | |
2612 | } | |
2613 | ||
2614 | if (r_symndx < symtab_hdr->sh_info) | |
2615 | { | |
2616 | sym = local_syms + r_symndx; | |
28dbbc02 | 2617 | sym_type = ELF32_ST_TYPE (sym->st_info); |
ab96bf03 AM |
2618 | sec = local_sections[r_symndx]; |
2619 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2620 | } | |
2621 | else | |
2622 | { | |
2623 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2624 | r_symndx, symtab_hdr, sym_hashes, | |
2625 | h, sec, relocation, | |
2626 | unresolved_reloc, warned); | |
2627 | ||
2628 | if (relocation == 0 | |
2629 | && !unresolved_reloc | |
2630 | && h->root.type == bfd_link_hash_undefweak) | |
2631 | is_weak_undef = TRUE; | |
28dbbc02 BW |
2632 | |
2633 | sym_type = h->type; | |
ab96bf03 AM |
2634 | } |
2635 | ||
2636 | if (sec != NULL && elf_discarded_section (sec)) | |
2637 | { | |
2638 | /* For relocs against symbols from removed linkonce sections, | |
2639 | or sections discarded by a linker script, we just want the | |
2640 | section contents zeroed. Avoid any special processing. */ | |
2641 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2642 | rel->r_info = 0; | |
2643 | rel->r_addend = 0; | |
2644 | continue; | |
2645 | } | |
2646 | ||
1049f94e | 2647 | if (info->relocatable) |
e0001a05 | 2648 | { |
43cd72b9 | 2649 | /* This is a relocatable link. |
e0001a05 NC |
2650 | 1) If the reloc is against a section symbol, adjust |
2651 | according to the output section. | |
2652 | 2) If there is a new target for this relocation, | |
2653 | the new target will be in the same output section. | |
2654 | We adjust the relocation by the output section | |
2655 | difference. */ | |
2656 | ||
2657 | if (relaxing_section) | |
2658 | { | |
2659 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2660 | if (!do_fix_for_relocatable_link (rel, input_bfd, input_section, |
2661 | contents)) | |
2662 | return FALSE; | |
e0001a05 NC |
2663 | } |
2664 | ||
43cd72b9 | 2665 | if (r_type == R_XTENSA_ASM_SIMPLIFY) |
e0001a05 | 2666 | { |
91d6fa6a | 2667 | error_message = NULL; |
e0001a05 NC |
2668 | /* Convert ASM_SIMPLIFY into the simpler relocation |
2669 | so that they never escape a relaxing link. */ | |
43cd72b9 BW |
2670 | r = contract_asm_expansion (contents, input_size, rel, |
2671 | &error_message); | |
2672 | if (r != bfd_reloc_ok) | |
2673 | { | |
2674 | if (!((*info->callbacks->reloc_dangerous) | |
2675 | (info, error_message, input_bfd, input_section, | |
2676 | rel->r_offset))) | |
2677 | return FALSE; | |
2678 | } | |
e0001a05 NC |
2679 | r_type = ELF32_R_TYPE (rel->r_info); |
2680 | } | |
2681 | ||
1049f94e | 2682 | /* This is a relocatable link, so we don't have to change |
e0001a05 NC |
2683 | anything unless the reloc is against a section symbol, |
2684 | in which case we have to adjust according to where the | |
2685 | section symbol winds up in the output section. */ | |
2686 | if (r_symndx < symtab_hdr->sh_info) | |
2687 | { | |
2688 | sym = local_syms + r_symndx; | |
2689 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2690 | { | |
2691 | sec = local_sections[r_symndx]; | |
2692 | rel->r_addend += sec->output_offset + sym->st_value; | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* If there is an addend with a partial_inplace howto, | |
2697 | then move the addend to the contents. This is a hack | |
1049f94e | 2698 | to work around problems with DWARF in relocatable links |
e0001a05 NC |
2699 | with some previous version of BFD. Now we can't easily get |
2700 | rid of the hack without breaking backward compatibility.... */ | |
2701 | if (rel->r_addend) | |
2702 | { | |
2703 | howto = &elf_howto_table[r_type]; | |
2704 | if (howto->partial_inplace) | |
2705 | { | |
2706 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2707 | rel->r_addend, contents, | |
2708 | rel->r_offset, FALSE, | |
2709 | &error_message); | |
2710 | if (r != bfd_reloc_ok) | |
2711 | { | |
2712 | if (!((*info->callbacks->reloc_dangerous) | |
2713 | (info, error_message, input_bfd, input_section, | |
2714 | rel->r_offset))) | |
2715 | return FALSE; | |
2716 | } | |
2717 | rel->r_addend = 0; | |
2718 | } | |
2719 | } | |
2720 | ||
1049f94e | 2721 | /* Done with work for relocatable link; continue with next reloc. */ |
e0001a05 NC |
2722 | continue; |
2723 | } | |
2724 | ||
2725 | /* This is a final link. */ | |
2726 | ||
e0001a05 NC |
2727 | if (relaxing_section) |
2728 | { | |
2729 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2730 | do_fix_for_final_link (rel, input_bfd, input_section, contents, |
2731 | &relocation); | |
e0001a05 NC |
2732 | } |
2733 | ||
2734 | /* Sanity check the address. */ | |
43cd72b9 | 2735 | if (rel->r_offset >= input_size |
e0001a05 NC |
2736 | && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE) |
2737 | { | |
43cd72b9 BW |
2738 | (*_bfd_error_handler) |
2739 | (_("%B(%A+0x%lx): relocation offset out of range (size=0x%x)"), | |
2740 | input_bfd, input_section, rel->r_offset, input_size); | |
e0001a05 NC |
2741 | bfd_set_error (bfd_error_bad_value); |
2742 | return FALSE; | |
2743 | } | |
2744 | ||
28dbbc02 BW |
2745 | if (h != NULL) |
2746 | name = h->root.root.string; | |
2747 | else | |
e0001a05 | 2748 | { |
28dbbc02 BW |
2749 | name = (bfd_elf_string_from_elf_section |
2750 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2751 | if (name == NULL || *name == '\0') | |
2752 | name = bfd_section_name (input_bfd, sec); | |
2753 | } | |
e0001a05 | 2754 | |
28dbbc02 BW |
2755 | if (r_symndx != 0 |
2756 | && r_type != R_XTENSA_NONE | |
2757 | && (h == NULL | |
2758 | || h->root.type == bfd_link_hash_defined | |
2759 | || h->root.type == bfd_link_hash_defweak) | |
2760 | && IS_XTENSA_TLS_RELOC (r_type) != (sym_type == STT_TLS)) | |
2761 | { | |
2762 | (*_bfd_error_handler) | |
2763 | ((sym_type == STT_TLS | |
2764 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") | |
2765 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), | |
2766 | input_bfd, | |
2767 | input_section, | |
2768 | (long) rel->r_offset, | |
2769 | howto->name, | |
2770 | name); | |
2771 | } | |
2772 | ||
2773 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); | |
2774 | ||
2775 | tls_type = GOT_UNKNOWN; | |
2776 | if (h) | |
2777 | tls_type = elf_xtensa_hash_entry (h)->tls_type; | |
2778 | else if (local_got_tls_types) | |
2779 | tls_type = local_got_tls_types [r_symndx]; | |
2780 | ||
2781 | switch (r_type) | |
2782 | { | |
2783 | case R_XTENSA_32: | |
2784 | case R_XTENSA_PLT: | |
2785 | if (elf_hash_table (info)->dynamic_sections_created | |
2786 | && (input_section->flags & SEC_ALLOC) != 0 | |
2787 | && (dynamic_symbol || info->shared)) | |
e0001a05 NC |
2788 | { |
2789 | Elf_Internal_Rela outrel; | |
2790 | bfd_byte *loc; | |
2791 | asection *srel; | |
2792 | ||
2793 | if (dynamic_symbol && r_type == R_XTENSA_PLT) | |
f0e6fdb2 | 2794 | srel = htab->srelplt; |
e0001a05 | 2795 | else |
f0e6fdb2 | 2796 | srel = htab->srelgot; |
e0001a05 NC |
2797 | |
2798 | BFD_ASSERT (srel != NULL); | |
2799 | ||
2800 | outrel.r_offset = | |
2801 | _bfd_elf_section_offset (output_bfd, info, | |
2802 | input_section, rel->r_offset); | |
2803 | ||
2804 | if ((outrel.r_offset | 1) == (bfd_vma) -1) | |
2805 | memset (&outrel, 0, sizeof outrel); | |
2806 | else | |
2807 | { | |
f0578e28 BW |
2808 | outrel.r_offset += (input_section->output_section->vma |
2809 | + input_section->output_offset); | |
e0001a05 | 2810 | |
88d65ad6 BW |
2811 | /* Complain if the relocation is in a read-only section |
2812 | and not in a literal pool. */ | |
2813 | if ((input_section->flags & SEC_READONLY) != 0 | |
2814 | && !elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
3ba3bc8c | 2815 | outrel.r_offset)) |
88d65ad6 BW |
2816 | { |
2817 | error_message = | |
2818 | _("dynamic relocation in read-only section"); | |
2819 | if (!((*info->callbacks->reloc_dangerous) | |
2820 | (info, error_message, input_bfd, input_section, | |
2821 | rel->r_offset))) | |
2822 | return FALSE; | |
2823 | } | |
2824 | ||
e0001a05 NC |
2825 | if (dynamic_symbol) |
2826 | { | |
2827 | outrel.r_addend = rel->r_addend; | |
2828 | rel->r_addend = 0; | |
2829 | ||
2830 | if (r_type == R_XTENSA_32) | |
2831 | { | |
2832 | outrel.r_info = | |
2833 | ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT); | |
2834 | relocation = 0; | |
2835 | } | |
2836 | else /* r_type == R_XTENSA_PLT */ | |
2837 | { | |
2838 | outrel.r_info = | |
2839 | ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT); | |
2840 | ||
2841 | /* Create the PLT entry and set the initial | |
2842 | contents of the literal entry to the address of | |
2843 | the PLT entry. */ | |
43cd72b9 | 2844 | relocation = |
f0e6fdb2 | 2845 | elf_xtensa_create_plt_entry (info, output_bfd, |
e0001a05 NC |
2846 | srel->reloc_count); |
2847 | } | |
2848 | unresolved_reloc = FALSE; | |
2849 | } | |
2850 | else | |
2851 | { | |
2852 | /* Generate a RELATIVE relocation. */ | |
2853 | outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE); | |
2854 | outrel.r_addend = 0; | |
2855 | } | |
2856 | } | |
2857 | ||
2858 | loc = (srel->contents | |
2859 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2860 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2861 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
eea6121a | 2862 | <= srel->size); |
e0001a05 | 2863 | } |
d9ab3f29 BW |
2864 | else if (r_type == R_XTENSA_ASM_EXPAND && dynamic_symbol) |
2865 | { | |
2866 | /* This should only happen for non-PIC code, which is not | |
2867 | supposed to be used on systems with dynamic linking. | |
2868 | Just ignore these relocations. */ | |
2869 | continue; | |
2870 | } | |
28dbbc02 BW |
2871 | break; |
2872 | ||
2873 | case R_XTENSA_TLS_TPOFF: | |
2874 | /* Switch to LE model for local symbols in an executable. */ | |
2875 | if (! info->shared && ! dynamic_symbol) | |
2876 | { | |
2877 | relocation = tpoff (info, relocation); | |
2878 | break; | |
2879 | } | |
2880 | /* fall through */ | |
2881 | ||
2882 | case R_XTENSA_TLSDESC_FN: | |
2883 | case R_XTENSA_TLSDESC_ARG: | |
2884 | { | |
2885 | if (r_type == R_XTENSA_TLSDESC_FN) | |
2886 | { | |
2887 | if (! info->shared || (tls_type & GOT_TLS_IE) != 0) | |
2888 | r_type = R_XTENSA_NONE; | |
2889 | } | |
2890 | else if (r_type == R_XTENSA_TLSDESC_ARG) | |
2891 | { | |
2892 | if (info->shared) | |
2893 | { | |
2894 | if ((tls_type & GOT_TLS_IE) != 0) | |
2895 | r_type = R_XTENSA_TLS_TPOFF; | |
2896 | } | |
2897 | else | |
2898 | { | |
2899 | r_type = R_XTENSA_TLS_TPOFF; | |
2900 | if (! dynamic_symbol) | |
2901 | { | |
2902 | relocation = tpoff (info, relocation); | |
2903 | break; | |
2904 | } | |
2905 | } | |
2906 | } | |
2907 | ||
2908 | if (r_type == R_XTENSA_NONE) | |
2909 | /* Nothing to do here; skip to the next reloc. */ | |
2910 | continue; | |
2911 | ||
2912 | if (! elf_hash_table (info)->dynamic_sections_created) | |
2913 | { | |
2914 | error_message = | |
2915 | _("TLS relocation invalid without dynamic sections"); | |
2916 | if (!((*info->callbacks->reloc_dangerous) | |
2917 | (info, error_message, input_bfd, input_section, | |
2918 | rel->r_offset))) | |
2919 | return FALSE; | |
2920 | } | |
2921 | else | |
2922 | { | |
2923 | Elf_Internal_Rela outrel; | |
2924 | bfd_byte *loc; | |
2925 | asection *srel = htab->srelgot; | |
2926 | int indx; | |
2927 | ||
2928 | outrel.r_offset = (input_section->output_section->vma | |
2929 | + input_section->output_offset | |
2930 | + rel->r_offset); | |
2931 | ||
2932 | /* Complain if the relocation is in a read-only section | |
2933 | and not in a literal pool. */ | |
2934 | if ((input_section->flags & SEC_READONLY) != 0 | |
2935 | && ! elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
2936 | outrel.r_offset)) | |
2937 | { | |
2938 | error_message = | |
2939 | _("dynamic relocation in read-only section"); | |
2940 | if (!((*info->callbacks->reloc_dangerous) | |
2941 | (info, error_message, input_bfd, input_section, | |
2942 | rel->r_offset))) | |
2943 | return FALSE; | |
2944 | } | |
2945 | ||
2946 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2947 | if (indx == 0) | |
2948 | outrel.r_addend = relocation - dtpoff_base (info); | |
2949 | else | |
2950 | outrel.r_addend = 0; | |
2951 | rel->r_addend = 0; | |
2952 | ||
2953 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
2954 | relocation = 0; | |
2955 | unresolved_reloc = FALSE; | |
2956 | ||
2957 | BFD_ASSERT (srel); | |
2958 | loc = (srel->contents | |
2959 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2960 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2961 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
2962 | <= srel->size); | |
2963 | } | |
2964 | } | |
2965 | break; | |
2966 | ||
2967 | case R_XTENSA_TLS_DTPOFF: | |
2968 | if (! info->shared) | |
2969 | /* Switch from LD model to LE model. */ | |
2970 | relocation = tpoff (info, relocation); | |
2971 | else | |
2972 | relocation -= dtpoff_base (info); | |
2973 | break; | |
2974 | ||
2975 | case R_XTENSA_TLS_FUNC: | |
2976 | case R_XTENSA_TLS_ARG: | |
2977 | case R_XTENSA_TLS_CALL: | |
2978 | /* Check if optimizing to IE or LE model. */ | |
2979 | if ((tls_type & GOT_TLS_IE) != 0) | |
2980 | { | |
2981 | bfd_boolean is_ld_model = | |
2982 | (h && elf_xtensa_hash_entry (h) == htab->tlsbase); | |
2983 | if (! replace_tls_insn (rel, input_bfd, input_section, contents, | |
2984 | is_ld_model, &error_message)) | |
2985 | { | |
2986 | if (!((*info->callbacks->reloc_dangerous) | |
2987 | (info, error_message, input_bfd, input_section, | |
2988 | rel->r_offset))) | |
2989 | return FALSE; | |
2990 | } | |
2991 | ||
2992 | if (r_type != R_XTENSA_TLS_ARG || is_ld_model) | |
2993 | { | |
2994 | /* Skip subsequent relocations on the same instruction. */ | |
2995 | while (rel + 1 < relend && rel[1].r_offset == rel->r_offset) | |
2996 | rel++; | |
2997 | } | |
2998 | } | |
2999 | continue; | |
3000 | ||
3001 | default: | |
3002 | if (elf_hash_table (info)->dynamic_sections_created | |
3003 | && dynamic_symbol && (is_operand_relocation (r_type) | |
3004 | || r_type == R_XTENSA_32_PCREL)) | |
3005 | { | |
3006 | error_message = | |
3007 | vsprint_msg ("invalid relocation for dynamic symbol", ": %s", | |
3008 | strlen (name) + 2, name); | |
3009 | if (!((*info->callbacks->reloc_dangerous) | |
3010 | (info, error_message, input_bfd, input_section, | |
3011 | rel->r_offset))) | |
3012 | return FALSE; | |
3013 | continue; | |
3014 | } | |
3015 | break; | |
e0001a05 NC |
3016 | } |
3017 | ||
3018 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
3019 | because such sections are not SEC_ALLOC and thus ld.so will | |
3020 | not process them. */ | |
3021 | if (unresolved_reloc | |
3022 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 3023 | && h->def_dynamic)) |
bf1747de BW |
3024 | { |
3025 | (*_bfd_error_handler) | |
3026 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
3027 | input_bfd, | |
3028 | input_section, | |
3029 | (long) rel->r_offset, | |
3030 | howto->name, | |
28dbbc02 | 3031 | name); |
bf1747de BW |
3032 | return FALSE; |
3033 | } | |
e0001a05 | 3034 | |
28dbbc02 BW |
3035 | /* TLS optimizations may have changed r_type; update "howto". */ |
3036 | howto = &elf_howto_table[r_type]; | |
3037 | ||
e0001a05 NC |
3038 | /* There's no point in calling bfd_perform_relocation here. |
3039 | Just go directly to our "special function". */ | |
3040 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
3041 | relocation + rel->r_addend, | |
3042 | contents, rel->r_offset, is_weak_undef, | |
3043 | &error_message); | |
43cd72b9 | 3044 | |
9b8c98a4 | 3045 | if (r != bfd_reloc_ok && !warned) |
e0001a05 | 3046 | { |
43cd72b9 | 3047 | BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other); |
7fa3d080 | 3048 | BFD_ASSERT (error_message != NULL); |
e0001a05 | 3049 | |
28dbbc02 BW |
3050 | if (rel->r_addend == 0) |
3051 | error_message = vsprint_msg (error_message, ": %s", | |
3052 | strlen (name) + 2, name); | |
e0001a05 | 3053 | else |
28dbbc02 BW |
3054 | error_message = vsprint_msg (error_message, ": (%s+0x%x)", |
3055 | strlen (name) + 22, | |
3056 | name, (int) rel->r_addend); | |
43cd72b9 | 3057 | |
e0001a05 NC |
3058 | if (!((*info->callbacks->reloc_dangerous) |
3059 | (info, error_message, input_bfd, input_section, | |
3060 | rel->r_offset))) | |
3061 | return FALSE; | |
3062 | } | |
3063 | } | |
3064 | ||
88d65ad6 BW |
3065 | if (lit_table) |
3066 | free (lit_table); | |
3067 | ||
3ba3bc8c BW |
3068 | input_section->reloc_done = TRUE; |
3069 | ||
e0001a05 NC |
3070 | return TRUE; |
3071 | } | |
3072 | ||
3073 | ||
3074 | /* Finish up dynamic symbol handling. There's not much to do here since | |
3075 | the PLT and GOT entries are all set up by relocate_section. */ | |
3076 | ||
3077 | static bfd_boolean | |
7fa3d080 BW |
3078 | elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
3079 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3080 | struct elf_link_hash_entry *h, | |
3081 | Elf_Internal_Sym *sym) | |
e0001a05 | 3082 | { |
bf1747de | 3083 | if (h->needs_plt && !h->def_regular) |
e0001a05 NC |
3084 | { |
3085 | /* Mark the symbol as undefined, rather than as defined in | |
3086 | the .plt section. Leave the value alone. */ | |
3087 | sym->st_shndx = SHN_UNDEF; | |
bf1747de BW |
3088 | /* If the symbol is weak, we do need to clear the value. |
3089 | Otherwise, the PLT entry would provide a definition for | |
3090 | the symbol even if the symbol wasn't defined anywhere, | |
3091 | and so the symbol would never be NULL. */ | |
3092 | if (!h->ref_regular_nonweak) | |
3093 | sym->st_value = 0; | |
e0001a05 NC |
3094 | } |
3095 | ||
3096 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3097 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 3098 | || h == elf_hash_table (info)->hgot) |
e0001a05 NC |
3099 | sym->st_shndx = SHN_ABS; |
3100 | ||
3101 | return TRUE; | |
3102 | } | |
3103 | ||
3104 | ||
3105 | /* Combine adjacent literal table entries in the output. Adjacent | |
3106 | entries within each input section may have been removed during | |
3107 | relaxation, but we repeat the process here, even though it's too late | |
3108 | to shrink the output section, because it's important to minimize the | |
3109 | number of literal table entries to reduce the start-up work for the | |
3110 | runtime linker. Returns the number of remaining table entries or -1 | |
3111 | on error. */ | |
3112 | ||
3113 | static int | |
7fa3d080 BW |
3114 | elf_xtensa_combine_prop_entries (bfd *output_bfd, |
3115 | asection *sxtlit, | |
3116 | asection *sgotloc) | |
e0001a05 | 3117 | { |
e0001a05 NC |
3118 | bfd_byte *contents; |
3119 | property_table_entry *table; | |
e901de89 | 3120 | bfd_size_type section_size, sgotloc_size; |
e0001a05 NC |
3121 | bfd_vma offset; |
3122 | int n, m, num; | |
3123 | ||
eea6121a | 3124 | section_size = sxtlit->size; |
e0001a05 NC |
3125 | BFD_ASSERT (section_size % 8 == 0); |
3126 | num = section_size / 8; | |
3127 | ||
eea6121a | 3128 | sgotloc_size = sgotloc->size; |
e901de89 | 3129 | if (sgotloc_size != section_size) |
b536dc1e BW |
3130 | { |
3131 | (*_bfd_error_handler) | |
43cd72b9 | 3132 | (_("internal inconsistency in size of .got.loc section")); |
b536dc1e BW |
3133 | return -1; |
3134 | } | |
e901de89 | 3135 | |
eea6121a AM |
3136 | table = bfd_malloc (num * sizeof (property_table_entry)); |
3137 | if (table == 0) | |
e0001a05 NC |
3138 | return -1; |
3139 | ||
3140 | /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this | |
3141 | propagates to the output section, where it doesn't really apply and | |
eea6121a | 3142 | where it breaks the following call to bfd_malloc_and_get_section. */ |
e901de89 | 3143 | sxtlit->flags &= ~SEC_IN_MEMORY; |
e0001a05 | 3144 | |
eea6121a AM |
3145 | if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents)) |
3146 | { | |
3147 | if (contents != 0) | |
3148 | free (contents); | |
3149 | free (table); | |
3150 | return -1; | |
3151 | } | |
e0001a05 NC |
3152 | |
3153 | /* There should never be any relocations left at this point, so this | |
3154 | is quite a bit easier than what is done during relaxation. */ | |
3155 | ||
3156 | /* Copy the raw contents into a property table array and sort it. */ | |
3157 | offset = 0; | |
3158 | for (n = 0; n < num; n++) | |
3159 | { | |
3160 | table[n].address = bfd_get_32 (output_bfd, &contents[offset]); | |
3161 | table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]); | |
3162 | offset += 8; | |
3163 | } | |
3164 | qsort (table, num, sizeof (property_table_entry), property_table_compare); | |
3165 | ||
3166 | for (n = 0; n < num; n++) | |
3167 | { | |
91d6fa6a | 3168 | bfd_boolean remove_entry = FALSE; |
e0001a05 NC |
3169 | |
3170 | if (table[n].size == 0) | |
91d6fa6a NC |
3171 | remove_entry = TRUE; |
3172 | else if (n > 0 | |
3173 | && (table[n-1].address + table[n-1].size == table[n].address)) | |
e0001a05 NC |
3174 | { |
3175 | table[n-1].size += table[n].size; | |
91d6fa6a | 3176 | remove_entry = TRUE; |
e0001a05 NC |
3177 | } |
3178 | ||
91d6fa6a | 3179 | if (remove_entry) |
e0001a05 NC |
3180 | { |
3181 | for (m = n; m < num - 1; m++) | |
3182 | { | |
3183 | table[m].address = table[m+1].address; | |
3184 | table[m].size = table[m+1].size; | |
3185 | } | |
3186 | ||
3187 | n--; | |
3188 | num--; | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | /* Copy the data back to the raw contents. */ | |
3193 | offset = 0; | |
3194 | for (n = 0; n < num; n++) | |
3195 | { | |
3196 | bfd_put_32 (output_bfd, table[n].address, &contents[offset]); | |
3197 | bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]); | |
3198 | offset += 8; | |
3199 | } | |
3200 | ||
3201 | /* Clear the removed bytes. */ | |
3202 | if ((bfd_size_type) (num * 8) < section_size) | |
b54d4b07 | 3203 | memset (&contents[num * 8], 0, section_size - num * 8); |
e0001a05 | 3204 | |
e901de89 BW |
3205 | if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0, |
3206 | section_size)) | |
e0001a05 NC |
3207 | return -1; |
3208 | ||
e901de89 BW |
3209 | /* Copy the contents to ".got.loc". */ |
3210 | memcpy (sgotloc->contents, contents, section_size); | |
3211 | ||
e0001a05 | 3212 | free (contents); |
b614a702 | 3213 | free (table); |
e0001a05 NC |
3214 | return num; |
3215 | } | |
3216 | ||
3217 | ||
3218 | /* Finish up the dynamic sections. */ | |
3219 | ||
3220 | static bfd_boolean | |
7fa3d080 BW |
3221 | elf_xtensa_finish_dynamic_sections (bfd *output_bfd, |
3222 | struct bfd_link_info *info) | |
e0001a05 | 3223 | { |
f0e6fdb2 | 3224 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 | 3225 | bfd *dynobj; |
e901de89 | 3226 | asection *sdyn, *srelplt, *sgot, *sxtlit, *sgotloc; |
e0001a05 | 3227 | Elf32_External_Dyn *dyncon, *dynconend; |
d9ab3f29 | 3228 | int num_xtlit_entries = 0; |
e0001a05 NC |
3229 | |
3230 | if (! elf_hash_table (info)->dynamic_sections_created) | |
3231 | return TRUE; | |
3232 | ||
f0e6fdb2 | 3233 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
3234 | dynobj = elf_hash_table (info)->dynobj; |
3235 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3236 | BFD_ASSERT (sdyn != NULL); | |
3237 | ||
3238 | /* Set the first entry in the global offset table to the address of | |
3239 | the dynamic section. */ | |
f0e6fdb2 | 3240 | sgot = htab->sgot; |
e0001a05 NC |
3241 | if (sgot) |
3242 | { | |
eea6121a | 3243 | BFD_ASSERT (sgot->size == 4); |
e0001a05 | 3244 | if (sdyn == NULL) |
7fa3d080 | 3245 | bfd_put_32 (output_bfd, 0, sgot->contents); |
e0001a05 NC |
3246 | else |
3247 | bfd_put_32 (output_bfd, | |
3248 | sdyn->output_section->vma + sdyn->output_offset, | |
3249 | sgot->contents); | |
3250 | } | |
3251 | ||
f0e6fdb2 | 3252 | srelplt = htab->srelplt; |
7fa3d080 | 3253 | if (srelplt && srelplt->size != 0) |
e0001a05 NC |
3254 | { |
3255 | asection *sgotplt, *srelgot, *spltlittbl; | |
3256 | int chunk, plt_chunks, plt_entries; | |
3257 | Elf_Internal_Rela irela; | |
3258 | bfd_byte *loc; | |
3259 | unsigned rtld_reloc; | |
3260 | ||
f0e6fdb2 BW |
3261 | srelgot = htab->srelgot; |
3262 | spltlittbl = htab->spltlittbl; | |
3263 | BFD_ASSERT (srelgot != NULL && spltlittbl != NULL); | |
e0001a05 NC |
3264 | |
3265 | /* Find the first XTENSA_RTLD relocation. Presumably the rest | |
3266 | of them follow immediately after.... */ | |
3267 | for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++) | |
3268 | { | |
3269 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3270 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3271 | if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD) | |
3272 | break; | |
3273 | } | |
3274 | BFD_ASSERT (rtld_reloc < srelgot->reloc_count); | |
3275 | ||
eea6121a | 3276 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
3277 | plt_chunks = |
3278 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
3279 | ||
3280 | for (chunk = 0; chunk < plt_chunks; chunk++) | |
3281 | { | |
3282 | int chunk_entries = 0; | |
3283 | ||
f0e6fdb2 | 3284 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
e0001a05 NC |
3285 | BFD_ASSERT (sgotplt != NULL); |
3286 | ||
3287 | /* Emit special RTLD relocations for the first two entries in | |
3288 | each chunk of the .got.plt section. */ | |
3289 | ||
3290 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3291 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3292 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3293 | irela.r_offset = (sgotplt->output_section->vma | |
3294 | + sgotplt->output_offset); | |
3295 | irela.r_addend = 1; /* tell rtld to set value to resolver function */ | |
3296 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3297 | rtld_reloc += 1; | |
3298 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3299 | ||
3300 | /* Next literal immediately follows the first. */ | |
3301 | loc += sizeof (Elf32_External_Rela); | |
3302 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3303 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3304 | irela.r_offset = (sgotplt->output_section->vma | |
3305 | + sgotplt->output_offset + 4); | |
3306 | /* Tell rtld to set value to object's link map. */ | |
3307 | irela.r_addend = 2; | |
3308 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3309 | rtld_reloc += 1; | |
3310 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3311 | ||
3312 | /* Fill in the literal table. */ | |
3313 | if (chunk < plt_chunks - 1) | |
3314 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
3315 | else | |
3316 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
3317 | ||
eea6121a | 3318 | BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size); |
e0001a05 NC |
3319 | bfd_put_32 (output_bfd, |
3320 | sgotplt->output_section->vma + sgotplt->output_offset, | |
3321 | spltlittbl->contents + (chunk * 8) + 0); | |
3322 | bfd_put_32 (output_bfd, | |
3323 | 8 + (chunk_entries * 4), | |
3324 | spltlittbl->contents + (chunk * 8) + 4); | |
3325 | } | |
3326 | ||
3327 | /* All the dynamic relocations have been emitted at this point. | |
3328 | Make sure the relocation sections are the correct size. */ | |
eea6121a AM |
3329 | if (srelgot->size != (sizeof (Elf32_External_Rela) |
3330 | * srelgot->reloc_count) | |
3331 | || srelplt->size != (sizeof (Elf32_External_Rela) | |
3332 | * srelplt->reloc_count)) | |
e0001a05 NC |
3333 | abort (); |
3334 | ||
3335 | /* The .xt.lit.plt section has just been modified. This must | |
3336 | happen before the code below which combines adjacent literal | |
3337 | table entries, and the .xt.lit.plt contents have to be forced to | |
3338 | the output here. */ | |
3339 | if (! bfd_set_section_contents (output_bfd, | |
3340 | spltlittbl->output_section, | |
3341 | spltlittbl->contents, | |
3342 | spltlittbl->output_offset, | |
eea6121a | 3343 | spltlittbl->size)) |
e0001a05 NC |
3344 | return FALSE; |
3345 | /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */ | |
3346 | spltlittbl->flags &= ~SEC_HAS_CONTENTS; | |
3347 | } | |
3348 | ||
3349 | /* Combine adjacent literal table entries. */ | |
1049f94e | 3350 | BFD_ASSERT (! info->relocatable); |
e901de89 | 3351 | sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit"); |
f0e6fdb2 | 3352 | sgotloc = htab->sgotloc; |
d9ab3f29 BW |
3353 | BFD_ASSERT (sgotloc); |
3354 | if (sxtlit) | |
3355 | { | |
3356 | num_xtlit_entries = | |
3357 | elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc); | |
3358 | if (num_xtlit_entries < 0) | |
3359 | return FALSE; | |
3360 | } | |
e0001a05 NC |
3361 | |
3362 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3363 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
e0001a05 NC |
3364 | for (; dyncon < dynconend; dyncon++) |
3365 | { | |
3366 | Elf_Internal_Dyn dyn; | |
e0001a05 NC |
3367 | |
3368 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3369 | ||
3370 | switch (dyn.d_tag) | |
3371 | { | |
3372 | default: | |
3373 | break; | |
3374 | ||
3375 | case DT_XTENSA_GOT_LOC_SZ: | |
e0001a05 NC |
3376 | dyn.d_un.d_val = num_xtlit_entries; |
3377 | break; | |
3378 | ||
3379 | case DT_XTENSA_GOT_LOC_OFF: | |
e29297b7 | 3380 | dyn.d_un.d_ptr = htab->sgotloc->output_section->vma; |
f0e6fdb2 BW |
3381 | break; |
3382 | ||
e0001a05 | 3383 | case DT_PLTGOT: |
e29297b7 | 3384 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
f0e6fdb2 BW |
3385 | break; |
3386 | ||
e0001a05 | 3387 | case DT_JMPREL: |
e29297b7 | 3388 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
e0001a05 NC |
3389 | break; |
3390 | ||
3391 | case DT_PLTRELSZ: | |
e29297b7 | 3392 | dyn.d_un.d_val = htab->srelplt->output_section->size; |
e0001a05 NC |
3393 | break; |
3394 | ||
3395 | case DT_RELASZ: | |
3396 | /* Adjust RELASZ to not include JMPREL. This matches what | |
3397 | glibc expects and what is done for several other ELF | |
3398 | targets (e.g., i386, alpha), but the "correct" behavior | |
3399 | seems to be unresolved. Since the linker script arranges | |
3400 | for .rela.plt to follow all other relocation sections, we | |
3401 | don't have to worry about changing the DT_RELA entry. */ | |
f0e6fdb2 | 3402 | if (htab->srelplt) |
e29297b7 | 3403 | dyn.d_un.d_val -= htab->srelplt->output_section->size; |
e0001a05 NC |
3404 | break; |
3405 | } | |
3406 | ||
3407 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3408 | } | |
3409 | ||
3410 | return TRUE; | |
3411 | } | |
3412 | ||
3413 | \f | |
3414 | /* Functions for dealing with the e_flags field. */ | |
3415 | ||
3416 | /* Merge backend specific data from an object file to the output | |
3417 | object file when linking. */ | |
3418 | ||
3419 | static bfd_boolean | |
7fa3d080 | 3420 | elf_xtensa_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
e0001a05 NC |
3421 | { |
3422 | unsigned out_mach, in_mach; | |
3423 | flagword out_flag, in_flag; | |
3424 | ||
3425 | /* Check if we have the same endianess. */ | |
3426 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
3427 | return FALSE; | |
3428 | ||
3429 | /* Don't even pretend to support mixed-format linking. */ | |
3430 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
3431 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
3432 | return FALSE; | |
3433 | ||
3434 | out_flag = elf_elfheader (obfd)->e_flags; | |
3435 | in_flag = elf_elfheader (ibfd)->e_flags; | |
3436 | ||
3437 | out_mach = out_flag & EF_XTENSA_MACH; | |
3438 | in_mach = in_flag & EF_XTENSA_MACH; | |
43cd72b9 | 3439 | if (out_mach != in_mach) |
e0001a05 NC |
3440 | { |
3441 | (*_bfd_error_handler) | |
43cd72b9 | 3442 | (_("%B: incompatible machine type. Output is 0x%x. Input is 0x%x"), |
d003868e | 3443 | ibfd, out_mach, in_mach); |
e0001a05 NC |
3444 | bfd_set_error (bfd_error_wrong_format); |
3445 | return FALSE; | |
3446 | } | |
3447 | ||
3448 | if (! elf_flags_init (obfd)) | |
3449 | { | |
3450 | elf_flags_init (obfd) = TRUE; | |
3451 | elf_elfheader (obfd)->e_flags = in_flag; | |
43cd72b9 | 3452 | |
e0001a05 NC |
3453 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
3454 | && bfd_get_arch_info (obfd)->the_default) | |
3455 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
3456 | bfd_get_mach (ibfd)); | |
43cd72b9 | 3457 | |
e0001a05 NC |
3458 | return TRUE; |
3459 | } | |
3460 | ||
43cd72b9 BW |
3461 | if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN)) |
3462 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN); | |
e0001a05 | 3463 | |
43cd72b9 BW |
3464 | if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT)) |
3465 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT); | |
e0001a05 NC |
3466 | |
3467 | return TRUE; | |
3468 | } | |
3469 | ||
3470 | ||
3471 | static bfd_boolean | |
7fa3d080 | 3472 | elf_xtensa_set_private_flags (bfd *abfd, flagword flags) |
e0001a05 NC |
3473 | { |
3474 | BFD_ASSERT (!elf_flags_init (abfd) | |
3475 | || elf_elfheader (abfd)->e_flags == flags); | |
3476 | ||
3477 | elf_elfheader (abfd)->e_flags |= flags; | |
3478 | elf_flags_init (abfd) = TRUE; | |
3479 | ||
3480 | return TRUE; | |
3481 | } | |
3482 | ||
3483 | ||
e0001a05 | 3484 | static bfd_boolean |
7fa3d080 | 3485 | elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg) |
e0001a05 NC |
3486 | { |
3487 | FILE *f = (FILE *) farg; | |
3488 | flagword e_flags = elf_elfheader (abfd)->e_flags; | |
3489 | ||
3490 | fprintf (f, "\nXtensa header:\n"); | |
43cd72b9 | 3491 | if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH) |
e0001a05 NC |
3492 | fprintf (f, "\nMachine = Base\n"); |
3493 | else | |
3494 | fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH); | |
3495 | ||
3496 | fprintf (f, "Insn tables = %s\n", | |
3497 | (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false"); | |
3498 | ||
3499 | fprintf (f, "Literal tables = %s\n", | |
3500 | (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false"); | |
3501 | ||
3502 | return _bfd_elf_print_private_bfd_data (abfd, farg); | |
3503 | } | |
3504 | ||
3505 | ||
3506 | /* Set the right machine number for an Xtensa ELF file. */ | |
3507 | ||
3508 | static bfd_boolean | |
7fa3d080 | 3509 | elf_xtensa_object_p (bfd *abfd) |
e0001a05 NC |
3510 | { |
3511 | int mach; | |
3512 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH; | |
3513 | ||
3514 | switch (arch) | |
3515 | { | |
3516 | case E_XTENSA_MACH: | |
3517 | mach = bfd_mach_xtensa; | |
3518 | break; | |
3519 | default: | |
3520 | return FALSE; | |
3521 | } | |
3522 | ||
3523 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach); | |
3524 | return TRUE; | |
3525 | } | |
3526 | ||
3527 | ||
3528 | /* The final processing done just before writing out an Xtensa ELF object | |
3529 | file. This gets the Xtensa architecture right based on the machine | |
3530 | number. */ | |
3531 | ||
3532 | static void | |
7fa3d080 BW |
3533 | elf_xtensa_final_write_processing (bfd *abfd, |
3534 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
e0001a05 NC |
3535 | { |
3536 | int mach; | |
3537 | unsigned long val; | |
3538 | ||
3539 | switch (mach = bfd_get_mach (abfd)) | |
3540 | { | |
3541 | case bfd_mach_xtensa: | |
3542 | val = E_XTENSA_MACH; | |
3543 | break; | |
3544 | default: | |
3545 | return; | |
3546 | } | |
3547 | ||
3548 | elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH); | |
3549 | elf_elfheader (abfd)->e_flags |= val; | |
3550 | } | |
3551 | ||
3552 | ||
3553 | static enum elf_reloc_type_class | |
7fa3d080 | 3554 | elf_xtensa_reloc_type_class (const Elf_Internal_Rela *rela) |
e0001a05 NC |
3555 | { |
3556 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3557 | { | |
3558 | case R_XTENSA_RELATIVE: | |
3559 | return reloc_class_relative; | |
3560 | case R_XTENSA_JMP_SLOT: | |
3561 | return reloc_class_plt; | |
3562 | default: | |
3563 | return reloc_class_normal; | |
3564 | } | |
3565 | } | |
3566 | ||
3567 | \f | |
3568 | static bfd_boolean | |
7fa3d080 BW |
3569 | elf_xtensa_discard_info_for_section (bfd *abfd, |
3570 | struct elf_reloc_cookie *cookie, | |
3571 | struct bfd_link_info *info, | |
3572 | asection *sec) | |
e0001a05 NC |
3573 | { |
3574 | bfd_byte *contents; | |
e0001a05 | 3575 | bfd_vma offset, actual_offset; |
1d25768e BW |
3576 | bfd_size_type removed_bytes = 0; |
3577 | bfd_size_type entry_size; | |
e0001a05 NC |
3578 | |
3579 | if (sec->output_section | |
3580 | && bfd_is_abs_section (sec->output_section)) | |
3581 | return FALSE; | |
3582 | ||
1d25768e BW |
3583 | if (xtensa_is_proptable_section (sec)) |
3584 | entry_size = 12; | |
3585 | else | |
3586 | entry_size = 8; | |
3587 | ||
a3ef2d63 | 3588 | if (sec->size == 0 || sec->size % entry_size != 0) |
1d25768e BW |
3589 | return FALSE; |
3590 | ||
e0001a05 NC |
3591 | contents = retrieve_contents (abfd, sec, info->keep_memory); |
3592 | if (!contents) | |
3593 | return FALSE; | |
3594 | ||
3595 | cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory); | |
3596 | if (!cookie->rels) | |
3597 | { | |
3598 | release_contents (sec, contents); | |
3599 | return FALSE; | |
3600 | } | |
3601 | ||
1d25768e BW |
3602 | /* Sort the relocations. They should already be in order when |
3603 | relaxation is enabled, but it might not be. */ | |
3604 | qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
3605 | internal_reloc_compare); | |
3606 | ||
e0001a05 NC |
3607 | cookie->rel = cookie->rels; |
3608 | cookie->relend = cookie->rels + sec->reloc_count; | |
3609 | ||
a3ef2d63 | 3610 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 NC |
3611 | { |
3612 | actual_offset = offset - removed_bytes; | |
3613 | ||
3614 | /* The ...symbol_deleted_p function will skip over relocs but it | |
3615 | won't adjust their offsets, so do that here. */ | |
3616 | while (cookie->rel < cookie->relend | |
3617 | && cookie->rel->r_offset < offset) | |
3618 | { | |
3619 | cookie->rel->r_offset -= removed_bytes; | |
3620 | cookie->rel++; | |
3621 | } | |
3622 | ||
3623 | while (cookie->rel < cookie->relend | |
3624 | && cookie->rel->r_offset == offset) | |
3625 | { | |
c152c796 | 3626 | if (bfd_elf_reloc_symbol_deleted_p (offset, cookie)) |
e0001a05 NC |
3627 | { |
3628 | /* Remove the table entry. (If the reloc type is NONE, then | |
3629 | the entry has already been merged with another and deleted | |
3630 | during relaxation.) */ | |
3631 | if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE) | |
3632 | { | |
3633 | /* Shift the contents up. */ | |
a3ef2d63 | 3634 | if (offset + entry_size < sec->size) |
e0001a05 | 3635 | memmove (&contents[actual_offset], |
1d25768e | 3636 | &contents[actual_offset + entry_size], |
a3ef2d63 | 3637 | sec->size - offset - entry_size); |
1d25768e | 3638 | removed_bytes += entry_size; |
e0001a05 NC |
3639 | } |
3640 | ||
3641 | /* Remove this relocation. */ | |
3642 | cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
3643 | } | |
3644 | ||
3645 | /* Adjust the relocation offset for previous removals. This | |
3646 | should not be done before calling ...symbol_deleted_p | |
3647 | because it might mess up the offset comparisons there. | |
3648 | Make sure the offset doesn't underflow in the case where | |
3649 | the first entry is removed. */ | |
3650 | if (cookie->rel->r_offset >= removed_bytes) | |
3651 | cookie->rel->r_offset -= removed_bytes; | |
3652 | else | |
3653 | cookie->rel->r_offset = 0; | |
3654 | ||
3655 | cookie->rel++; | |
3656 | } | |
3657 | } | |
3658 | ||
3659 | if (removed_bytes != 0) | |
3660 | { | |
3661 | /* Adjust any remaining relocs (shouldn't be any). */ | |
3662 | for (; cookie->rel < cookie->relend; cookie->rel++) | |
3663 | { | |
3664 | if (cookie->rel->r_offset >= removed_bytes) | |
3665 | cookie->rel->r_offset -= removed_bytes; | |
3666 | else | |
3667 | cookie->rel->r_offset = 0; | |
3668 | } | |
3669 | ||
3670 | /* Clear the removed bytes. */ | |
a3ef2d63 | 3671 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 NC |
3672 | |
3673 | pin_contents (sec, contents); | |
3674 | pin_internal_relocs (sec, cookie->rels); | |
3675 | ||
eea6121a | 3676 | /* Shrink size. */ |
a3ef2d63 BW |
3677 | if (sec->rawsize == 0) |
3678 | sec->rawsize = sec->size; | |
3679 | sec->size -= removed_bytes; | |
b536dc1e BW |
3680 | |
3681 | if (xtensa_is_littable_section (sec)) | |
3682 | { | |
f0e6fdb2 BW |
3683 | asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc; |
3684 | if (sgotloc) | |
3685 | sgotloc->size -= removed_bytes; | |
b536dc1e | 3686 | } |
e0001a05 NC |
3687 | } |
3688 | else | |
3689 | { | |
3690 | release_contents (sec, contents); | |
3691 | release_internal_relocs (sec, cookie->rels); | |
3692 | } | |
3693 | ||
3694 | return (removed_bytes != 0); | |
3695 | } | |
3696 | ||
3697 | ||
3698 | static bfd_boolean | |
7fa3d080 BW |
3699 | elf_xtensa_discard_info (bfd *abfd, |
3700 | struct elf_reloc_cookie *cookie, | |
3701 | struct bfd_link_info *info) | |
e0001a05 NC |
3702 | { |
3703 | asection *sec; | |
3704 | bfd_boolean changed = FALSE; | |
3705 | ||
3706 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
3707 | { | |
3708 | if (xtensa_is_property_section (sec)) | |
3709 | { | |
3710 | if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)) | |
3711 | changed = TRUE; | |
3712 | } | |
3713 | } | |
3714 | ||
3715 | return changed; | |
3716 | } | |
3717 | ||
3718 | ||
3719 | static bfd_boolean | |
7fa3d080 | 3720 | elf_xtensa_ignore_discarded_relocs (asection *sec) |
e0001a05 NC |
3721 | { |
3722 | return xtensa_is_property_section (sec); | |
3723 | } | |
3724 | ||
a77dc2cc BW |
3725 | |
3726 | static unsigned int | |
3727 | elf_xtensa_action_discarded (asection *sec) | |
3728 | { | |
3729 | if (strcmp (".xt_except_table", sec->name) == 0) | |
3730 | return 0; | |
3731 | ||
3732 | if (strcmp (".xt_except_desc", sec->name) == 0) | |
3733 | return 0; | |
3734 | ||
3735 | return _bfd_elf_default_action_discarded (sec); | |
3736 | } | |
3737 | ||
e0001a05 NC |
3738 | \f |
3739 | /* Support for core dump NOTE sections. */ | |
3740 | ||
3741 | static bfd_boolean | |
7fa3d080 | 3742 | elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3743 | { |
3744 | int offset; | |
eea6121a | 3745 | unsigned int size; |
e0001a05 NC |
3746 | |
3747 | /* The size for Xtensa is variable, so don't try to recognize the format | |
3748 | based on the size. Just assume this is GNU/Linux. */ | |
3749 | ||
3750 | /* pr_cursig */ | |
3751 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3752 | ||
3753 | /* pr_pid */ | |
3754 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3755 | ||
3756 | /* pr_reg */ | |
3757 | offset = 72; | |
eea6121a | 3758 | size = note->descsz - offset - 4; |
e0001a05 NC |
3759 | |
3760 | /* Make a ".reg/999" section. */ | |
3761 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3762 | size, note->descpos + offset); |
e0001a05 NC |
3763 | } |
3764 | ||
3765 | ||
3766 | static bfd_boolean | |
7fa3d080 | 3767 | elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3768 | { |
3769 | switch (note->descsz) | |
3770 | { | |
3771 | default: | |
3772 | return FALSE; | |
3773 | ||
3774 | case 128: /* GNU/Linux elf_prpsinfo */ | |
3775 | elf_tdata (abfd)->core_program | |
3776 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
3777 | elf_tdata (abfd)->core_command | |
3778 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
3779 | } | |
3780 | ||
3781 | /* Note that for some reason, a spurious space is tacked | |
3782 | onto the end of the args in some (at least one anyway) | |
3783 | implementations, so strip it off if it exists. */ | |
3784 | ||
3785 | { | |
3786 | char *command = elf_tdata (abfd)->core_command; | |
3787 | int n = strlen (command); | |
3788 | ||
3789 | if (0 < n && command[n - 1] == ' ') | |
3790 | command[n - 1] = '\0'; | |
3791 | } | |
3792 | ||
3793 | return TRUE; | |
3794 | } | |
3795 | ||
3796 | \f | |
3797 | /* Generic Xtensa configurability stuff. */ | |
3798 | ||
3799 | static xtensa_opcode callx0_op = XTENSA_UNDEFINED; | |
3800 | static xtensa_opcode callx4_op = XTENSA_UNDEFINED; | |
3801 | static xtensa_opcode callx8_op = XTENSA_UNDEFINED; | |
3802 | static xtensa_opcode callx12_op = XTENSA_UNDEFINED; | |
3803 | static xtensa_opcode call0_op = XTENSA_UNDEFINED; | |
3804 | static xtensa_opcode call4_op = XTENSA_UNDEFINED; | |
3805 | static xtensa_opcode call8_op = XTENSA_UNDEFINED; | |
3806 | static xtensa_opcode call12_op = XTENSA_UNDEFINED; | |
3807 | ||
3808 | static void | |
7fa3d080 | 3809 | init_call_opcodes (void) |
e0001a05 NC |
3810 | { |
3811 | if (callx0_op == XTENSA_UNDEFINED) | |
3812 | { | |
3813 | callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0"); | |
3814 | callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4"); | |
3815 | callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8"); | |
3816 | callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12"); | |
3817 | call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0"); | |
3818 | call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4"); | |
3819 | call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8"); | |
3820 | call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12"); | |
3821 | } | |
3822 | } | |
3823 | ||
3824 | ||
3825 | static bfd_boolean | |
7fa3d080 | 3826 | is_indirect_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3827 | { |
3828 | init_call_opcodes (); | |
3829 | return (opcode == callx0_op | |
3830 | || opcode == callx4_op | |
3831 | || opcode == callx8_op | |
3832 | || opcode == callx12_op); | |
3833 | } | |
3834 | ||
3835 | ||
3836 | static bfd_boolean | |
7fa3d080 | 3837 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3838 | { |
3839 | init_call_opcodes (); | |
3840 | return (opcode == call0_op | |
3841 | || opcode == call4_op | |
3842 | || opcode == call8_op | |
3843 | || opcode == call12_op); | |
3844 | } | |
3845 | ||
3846 | ||
3847 | static bfd_boolean | |
7fa3d080 | 3848 | is_windowed_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3849 | { |
3850 | init_call_opcodes (); | |
3851 | return (opcode == call4_op | |
3852 | || opcode == call8_op | |
3853 | || opcode == call12_op | |
3854 | || opcode == callx4_op | |
3855 | || opcode == callx8_op | |
3856 | || opcode == callx12_op); | |
3857 | } | |
3858 | ||
3859 | ||
28dbbc02 BW |
3860 | static bfd_boolean |
3861 | get_indirect_call_dest_reg (xtensa_opcode opcode, unsigned *pdst) | |
3862 | { | |
3863 | unsigned dst = (unsigned) -1; | |
3864 | ||
3865 | init_call_opcodes (); | |
3866 | if (opcode == callx0_op) | |
3867 | dst = 0; | |
3868 | else if (opcode == callx4_op) | |
3869 | dst = 4; | |
3870 | else if (opcode == callx8_op) | |
3871 | dst = 8; | |
3872 | else if (opcode == callx12_op) | |
3873 | dst = 12; | |
3874 | ||
3875 | if (dst == (unsigned) -1) | |
3876 | return FALSE; | |
3877 | ||
3878 | *pdst = dst; | |
3879 | return TRUE; | |
3880 | } | |
3881 | ||
3882 | ||
43cd72b9 BW |
3883 | static xtensa_opcode |
3884 | get_const16_opcode (void) | |
3885 | { | |
3886 | static bfd_boolean done_lookup = FALSE; | |
3887 | static xtensa_opcode const16_opcode = XTENSA_UNDEFINED; | |
3888 | if (!done_lookup) | |
3889 | { | |
3890 | const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16"); | |
3891 | done_lookup = TRUE; | |
3892 | } | |
3893 | return const16_opcode; | |
3894 | } | |
3895 | ||
3896 | ||
e0001a05 NC |
3897 | static xtensa_opcode |
3898 | get_l32r_opcode (void) | |
3899 | { | |
3900 | static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED; | |
43cd72b9 BW |
3901 | static bfd_boolean done_lookup = FALSE; |
3902 | ||
3903 | if (!done_lookup) | |
e0001a05 NC |
3904 | { |
3905 | l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r"); | |
43cd72b9 | 3906 | done_lookup = TRUE; |
e0001a05 NC |
3907 | } |
3908 | return l32r_opcode; | |
3909 | } | |
3910 | ||
3911 | ||
3912 | static bfd_vma | |
7fa3d080 | 3913 | l32r_offset (bfd_vma addr, bfd_vma pc) |
e0001a05 NC |
3914 | { |
3915 | bfd_vma offset; | |
3916 | ||
3917 | offset = addr - ((pc+3) & -4); | |
3918 | BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0); | |
3919 | offset = (signed int) offset >> 2; | |
3920 | BFD_ASSERT ((signed int) offset >> 16 == -1); | |
3921 | return offset; | |
3922 | } | |
3923 | ||
3924 | ||
e0001a05 | 3925 | static int |
7fa3d080 | 3926 | get_relocation_opnd (xtensa_opcode opcode, int r_type) |
e0001a05 | 3927 | { |
43cd72b9 BW |
3928 | xtensa_isa isa = xtensa_default_isa; |
3929 | int last_immed, last_opnd, opi; | |
3930 | ||
3931 | if (opcode == XTENSA_UNDEFINED) | |
3932 | return XTENSA_UNDEFINED; | |
3933 | ||
3934 | /* Find the last visible PC-relative immediate operand for the opcode. | |
3935 | If there are no PC-relative immediates, then choose the last visible | |
3936 | immediate; otherwise, fail and return XTENSA_UNDEFINED. */ | |
3937 | last_immed = XTENSA_UNDEFINED; | |
3938 | last_opnd = xtensa_opcode_num_operands (isa, opcode); | |
3939 | for (opi = last_opnd - 1; opi >= 0; opi--) | |
3940 | { | |
3941 | if (xtensa_operand_is_visible (isa, opcode, opi) == 0) | |
3942 | continue; | |
3943 | if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1) | |
3944 | { | |
3945 | last_immed = opi; | |
3946 | break; | |
3947 | } | |
3948 | if (last_immed == XTENSA_UNDEFINED | |
3949 | && xtensa_operand_is_register (isa, opcode, opi) == 0) | |
3950 | last_immed = opi; | |
3951 | } | |
3952 | if (last_immed < 0) | |
3953 | return XTENSA_UNDEFINED; | |
3954 | ||
3955 | /* If the operand number was specified in an old-style relocation, | |
3956 | check for consistency with the operand computed above. */ | |
3957 | if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2) | |
3958 | { | |
3959 | int reloc_opnd = r_type - R_XTENSA_OP0; | |
3960 | if (reloc_opnd != last_immed) | |
3961 | return XTENSA_UNDEFINED; | |
3962 | } | |
3963 | ||
3964 | return last_immed; | |
3965 | } | |
3966 | ||
3967 | ||
3968 | int | |
7fa3d080 | 3969 | get_relocation_slot (int r_type) |
43cd72b9 BW |
3970 | { |
3971 | switch (r_type) | |
3972 | { | |
3973 | case R_XTENSA_OP0: | |
3974 | case R_XTENSA_OP1: | |
3975 | case R_XTENSA_OP2: | |
3976 | return 0; | |
3977 | ||
3978 | default: | |
3979 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3980 | return r_type - R_XTENSA_SLOT0_OP; | |
3981 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3982 | return r_type - R_XTENSA_SLOT0_ALT; | |
3983 | break; | |
3984 | } | |
3985 | ||
3986 | return XTENSA_UNDEFINED; | |
e0001a05 NC |
3987 | } |
3988 | ||
3989 | ||
3990 | /* Get the opcode for a relocation. */ | |
3991 | ||
3992 | static xtensa_opcode | |
7fa3d080 BW |
3993 | get_relocation_opcode (bfd *abfd, |
3994 | asection *sec, | |
3995 | bfd_byte *contents, | |
3996 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3997 | { |
3998 | static xtensa_insnbuf ibuff = NULL; | |
43cd72b9 | 3999 | static xtensa_insnbuf sbuff = NULL; |
e0001a05 | 4000 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
4001 | xtensa_format fmt; |
4002 | int slot; | |
e0001a05 NC |
4003 | |
4004 | if (contents == NULL) | |
4005 | return XTENSA_UNDEFINED; | |
4006 | ||
43cd72b9 | 4007 | if (bfd_get_section_limit (abfd, sec) <= irel->r_offset) |
e0001a05 NC |
4008 | return XTENSA_UNDEFINED; |
4009 | ||
4010 | if (ibuff == NULL) | |
43cd72b9 BW |
4011 | { |
4012 | ibuff = xtensa_insnbuf_alloc (isa); | |
4013 | sbuff = xtensa_insnbuf_alloc (isa); | |
4014 | } | |
4015 | ||
e0001a05 | 4016 | /* Decode the instruction. */ |
43cd72b9 BW |
4017 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset], |
4018 | sec->size - irel->r_offset); | |
4019 | fmt = xtensa_format_decode (isa, ibuff); | |
4020 | slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info)); | |
4021 | if (slot == XTENSA_UNDEFINED) | |
4022 | return XTENSA_UNDEFINED; | |
4023 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); | |
4024 | return xtensa_opcode_decode (isa, fmt, slot, sbuff); | |
e0001a05 NC |
4025 | } |
4026 | ||
4027 | ||
4028 | bfd_boolean | |
7fa3d080 BW |
4029 | is_l32r_relocation (bfd *abfd, |
4030 | asection *sec, | |
4031 | bfd_byte *contents, | |
4032 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
4033 | { |
4034 | xtensa_opcode opcode; | |
43cd72b9 | 4035 | if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info))) |
e0001a05 | 4036 | return FALSE; |
43cd72b9 | 4037 | opcode = get_relocation_opcode (abfd, sec, contents, irel); |
e0001a05 NC |
4038 | return (opcode == get_l32r_opcode ()); |
4039 | } | |
4040 | ||
e0001a05 | 4041 | |
43cd72b9 | 4042 | static bfd_size_type |
7fa3d080 BW |
4043 | get_asm_simplify_size (bfd_byte *contents, |
4044 | bfd_size_type content_len, | |
4045 | bfd_size_type offset) | |
e0001a05 | 4046 | { |
43cd72b9 | 4047 | bfd_size_type insnlen, size = 0; |
e0001a05 | 4048 | |
43cd72b9 BW |
4049 | /* Decode the size of the next two instructions. */ |
4050 | insnlen = insn_decode_len (contents, content_len, offset); | |
4051 | if (insnlen == 0) | |
4052 | return 0; | |
e0001a05 | 4053 | |
43cd72b9 | 4054 | size += insnlen; |
e0001a05 | 4055 | |
43cd72b9 BW |
4056 | insnlen = insn_decode_len (contents, content_len, offset + size); |
4057 | if (insnlen == 0) | |
4058 | return 0; | |
e0001a05 | 4059 | |
43cd72b9 BW |
4060 | size += insnlen; |
4061 | return size; | |
4062 | } | |
e0001a05 | 4063 | |
43cd72b9 BW |
4064 | |
4065 | bfd_boolean | |
7fa3d080 | 4066 | is_alt_relocation (int r_type) |
43cd72b9 BW |
4067 | { |
4068 | return (r_type >= R_XTENSA_SLOT0_ALT | |
4069 | && r_type <= R_XTENSA_SLOT14_ALT); | |
e0001a05 NC |
4070 | } |
4071 | ||
4072 | ||
43cd72b9 | 4073 | bfd_boolean |
7fa3d080 | 4074 | is_operand_relocation (int r_type) |
e0001a05 | 4075 | { |
43cd72b9 BW |
4076 | switch (r_type) |
4077 | { | |
4078 | case R_XTENSA_OP0: | |
4079 | case R_XTENSA_OP1: | |
4080 | case R_XTENSA_OP2: | |
4081 | return TRUE; | |
e0001a05 | 4082 | |
43cd72b9 BW |
4083 | default: |
4084 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
4085 | return TRUE; | |
4086 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
4087 | return TRUE; | |
4088 | break; | |
4089 | } | |
e0001a05 | 4090 | |
43cd72b9 | 4091 | return FALSE; |
e0001a05 NC |
4092 | } |
4093 | ||
43cd72b9 BW |
4094 | |
4095 | #define MIN_INSN_LENGTH 2 | |
e0001a05 | 4096 | |
43cd72b9 BW |
4097 | /* Return 0 if it fails to decode. */ |
4098 | ||
4099 | bfd_size_type | |
7fa3d080 BW |
4100 | insn_decode_len (bfd_byte *contents, |
4101 | bfd_size_type content_len, | |
4102 | bfd_size_type offset) | |
e0001a05 | 4103 | { |
43cd72b9 BW |
4104 | int insn_len; |
4105 | xtensa_isa isa = xtensa_default_isa; | |
4106 | xtensa_format fmt; | |
4107 | static xtensa_insnbuf ibuff = NULL; | |
e0001a05 | 4108 | |
43cd72b9 BW |
4109 | if (offset + MIN_INSN_LENGTH > content_len) |
4110 | return 0; | |
e0001a05 | 4111 | |
43cd72b9 BW |
4112 | if (ibuff == NULL) |
4113 | ibuff = xtensa_insnbuf_alloc (isa); | |
4114 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset], | |
4115 | content_len - offset); | |
4116 | fmt = xtensa_format_decode (isa, ibuff); | |
4117 | if (fmt == XTENSA_UNDEFINED) | |
4118 | return 0; | |
4119 | insn_len = xtensa_format_length (isa, fmt); | |
4120 | if (insn_len == XTENSA_UNDEFINED) | |
4121 | return 0; | |
4122 | return insn_len; | |
e0001a05 NC |
4123 | } |
4124 | ||
4125 | ||
43cd72b9 BW |
4126 | /* Decode the opcode for a single slot instruction. |
4127 | Return 0 if it fails to decode or the instruction is multi-slot. */ | |
e0001a05 | 4128 | |
43cd72b9 | 4129 | xtensa_opcode |
7fa3d080 BW |
4130 | insn_decode_opcode (bfd_byte *contents, |
4131 | bfd_size_type content_len, | |
4132 | bfd_size_type offset, | |
4133 | int slot) | |
e0001a05 | 4134 | { |
e0001a05 | 4135 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
4136 | xtensa_format fmt; |
4137 | static xtensa_insnbuf insnbuf = NULL; | |
4138 | static xtensa_insnbuf slotbuf = NULL; | |
4139 | ||
4140 | if (offset + MIN_INSN_LENGTH > content_len) | |
e0001a05 NC |
4141 | return XTENSA_UNDEFINED; |
4142 | ||
4143 | if (insnbuf == NULL) | |
43cd72b9 BW |
4144 | { |
4145 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4146 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4147 | } | |
4148 | ||
4149 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4150 | content_len - offset); | |
4151 | fmt = xtensa_format_decode (isa, insnbuf); | |
4152 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4153 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4154 | |
4155 | if (slot >= xtensa_format_num_slots (isa, fmt)) | |
e0001a05 | 4156 | return XTENSA_UNDEFINED; |
e0001a05 | 4157 | |
43cd72b9 BW |
4158 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
4159 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
4160 | } | |
e0001a05 | 4161 | |
e0001a05 | 4162 | |
43cd72b9 BW |
4163 | /* The offset is the offset in the contents. |
4164 | The address is the address of that offset. */ | |
e0001a05 | 4165 | |
43cd72b9 | 4166 | static bfd_boolean |
7fa3d080 BW |
4167 | check_branch_target_aligned (bfd_byte *contents, |
4168 | bfd_size_type content_length, | |
4169 | bfd_vma offset, | |
4170 | bfd_vma address) | |
43cd72b9 BW |
4171 | { |
4172 | bfd_size_type insn_len = insn_decode_len (contents, content_length, offset); | |
4173 | if (insn_len == 0) | |
4174 | return FALSE; | |
4175 | return check_branch_target_aligned_address (address, insn_len); | |
4176 | } | |
e0001a05 | 4177 | |
e0001a05 | 4178 | |
43cd72b9 | 4179 | static bfd_boolean |
7fa3d080 BW |
4180 | check_loop_aligned (bfd_byte *contents, |
4181 | bfd_size_type content_length, | |
4182 | bfd_vma offset, | |
4183 | bfd_vma address) | |
e0001a05 | 4184 | { |
43cd72b9 | 4185 | bfd_size_type loop_len, insn_len; |
64b607e6 | 4186 | xtensa_opcode opcode; |
e0001a05 | 4187 | |
64b607e6 BW |
4188 | opcode = insn_decode_opcode (contents, content_length, offset, 0); |
4189 | if (opcode == XTENSA_UNDEFINED | |
4190 | || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1) | |
4191 | { | |
4192 | BFD_ASSERT (FALSE); | |
4193 | return FALSE; | |
4194 | } | |
4195 | ||
43cd72b9 | 4196 | loop_len = insn_decode_len (contents, content_length, offset); |
43cd72b9 | 4197 | insn_len = insn_decode_len (contents, content_length, offset + loop_len); |
64b607e6 BW |
4198 | if (loop_len == 0 || insn_len == 0) |
4199 | { | |
4200 | BFD_ASSERT (FALSE); | |
4201 | return FALSE; | |
4202 | } | |
e0001a05 | 4203 | |
43cd72b9 BW |
4204 | return check_branch_target_aligned_address (address + loop_len, insn_len); |
4205 | } | |
e0001a05 | 4206 | |
e0001a05 NC |
4207 | |
4208 | static bfd_boolean | |
7fa3d080 | 4209 | check_branch_target_aligned_address (bfd_vma addr, int len) |
e0001a05 | 4210 | { |
43cd72b9 BW |
4211 | if (len == 8) |
4212 | return (addr % 8 == 0); | |
4213 | return ((addr >> 2) == ((addr + len - 1) >> 2)); | |
e0001a05 NC |
4214 | } |
4215 | ||
43cd72b9 BW |
4216 | \f |
4217 | /* Instruction widening and narrowing. */ | |
e0001a05 | 4218 | |
7fa3d080 BW |
4219 | /* When FLIX is available we need to access certain instructions only |
4220 | when they are 16-bit or 24-bit instructions. This table caches | |
4221 | information about such instructions by walking through all the | |
4222 | opcodes and finding the smallest single-slot format into which each | |
4223 | can be encoded. */ | |
4224 | ||
4225 | static xtensa_format *op_single_fmt_table = NULL; | |
e0001a05 NC |
4226 | |
4227 | ||
7fa3d080 BW |
4228 | static void |
4229 | init_op_single_format_table (void) | |
e0001a05 | 4230 | { |
7fa3d080 BW |
4231 | xtensa_isa isa = xtensa_default_isa; |
4232 | xtensa_insnbuf ibuf; | |
4233 | xtensa_opcode opcode; | |
4234 | xtensa_format fmt; | |
4235 | int num_opcodes; | |
4236 | ||
4237 | if (op_single_fmt_table) | |
4238 | return; | |
4239 | ||
4240 | ibuf = xtensa_insnbuf_alloc (isa); | |
4241 | num_opcodes = xtensa_isa_num_opcodes (isa); | |
4242 | ||
4243 | op_single_fmt_table = (xtensa_format *) | |
4244 | bfd_malloc (sizeof (xtensa_format) * num_opcodes); | |
4245 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
4246 | { | |
4247 | op_single_fmt_table[opcode] = XTENSA_UNDEFINED; | |
4248 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
4249 | { | |
4250 | if (xtensa_format_num_slots (isa, fmt) == 1 | |
4251 | && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0) | |
4252 | { | |
4253 | xtensa_opcode old_fmt = op_single_fmt_table[opcode]; | |
4254 | int fmt_length = xtensa_format_length (isa, fmt); | |
4255 | if (old_fmt == XTENSA_UNDEFINED | |
4256 | || fmt_length < xtensa_format_length (isa, old_fmt)) | |
4257 | op_single_fmt_table[opcode] = fmt; | |
4258 | } | |
4259 | } | |
4260 | } | |
4261 | xtensa_insnbuf_free (isa, ibuf); | |
4262 | } | |
4263 | ||
4264 | ||
4265 | static xtensa_format | |
4266 | get_single_format (xtensa_opcode opcode) | |
4267 | { | |
4268 | init_op_single_format_table (); | |
4269 | return op_single_fmt_table[opcode]; | |
4270 | } | |
e0001a05 | 4271 | |
e0001a05 | 4272 | |
43cd72b9 BW |
4273 | /* For the set of narrowable instructions we do NOT include the |
4274 | narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities | |
4275 | involved during linker relaxation that may require these to | |
4276 | re-expand in some conditions. Also, the narrowing "or" -> mov.n | |
4277 | requires special case code to ensure it only works when op1 == op2. */ | |
e0001a05 | 4278 | |
7fa3d080 BW |
4279 | struct string_pair |
4280 | { | |
4281 | const char *wide; | |
4282 | const char *narrow; | |
4283 | }; | |
4284 | ||
43cd72b9 | 4285 | struct string_pair narrowable[] = |
e0001a05 | 4286 | { |
43cd72b9 BW |
4287 | { "add", "add.n" }, |
4288 | { "addi", "addi.n" }, | |
4289 | { "addmi", "addi.n" }, | |
4290 | { "l32i", "l32i.n" }, | |
4291 | { "movi", "movi.n" }, | |
4292 | { "ret", "ret.n" }, | |
4293 | { "retw", "retw.n" }, | |
4294 | { "s32i", "s32i.n" }, | |
4295 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4296 | }; | |
e0001a05 | 4297 | |
43cd72b9 | 4298 | struct string_pair widenable[] = |
e0001a05 | 4299 | { |
43cd72b9 BW |
4300 | { "add", "add.n" }, |
4301 | { "addi", "addi.n" }, | |
4302 | { "addmi", "addi.n" }, | |
4303 | { "beqz", "beqz.n" }, | |
4304 | { "bnez", "bnez.n" }, | |
4305 | { "l32i", "l32i.n" }, | |
4306 | { "movi", "movi.n" }, | |
4307 | { "ret", "ret.n" }, | |
4308 | { "retw", "retw.n" }, | |
4309 | { "s32i", "s32i.n" }, | |
4310 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4311 | }; | |
e0001a05 NC |
4312 | |
4313 | ||
64b607e6 BW |
4314 | /* Check if an instruction can be "narrowed", i.e., changed from a standard |
4315 | 3-byte instruction to a 2-byte "density" instruction. If it is valid, | |
4316 | return the instruction buffer holding the narrow instruction. Otherwise, | |
4317 | return 0. The set of valid narrowing are specified by a string table | |
43cd72b9 BW |
4318 | but require some special case operand checks in some cases. */ |
4319 | ||
64b607e6 BW |
4320 | static xtensa_insnbuf |
4321 | can_narrow_instruction (xtensa_insnbuf slotbuf, | |
4322 | xtensa_format fmt, | |
4323 | xtensa_opcode opcode) | |
e0001a05 | 4324 | { |
43cd72b9 | 4325 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4326 | xtensa_format o_fmt; |
4327 | unsigned opi; | |
e0001a05 | 4328 | |
43cd72b9 BW |
4329 | static xtensa_insnbuf o_insnbuf = NULL; |
4330 | static xtensa_insnbuf o_slotbuf = NULL; | |
e0001a05 | 4331 | |
64b607e6 | 4332 | if (o_insnbuf == NULL) |
43cd72b9 | 4333 | { |
43cd72b9 BW |
4334 | o_insnbuf = xtensa_insnbuf_alloc (isa); |
4335 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4336 | } | |
e0001a05 | 4337 | |
64b607e6 | 4338 | for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++) |
43cd72b9 BW |
4339 | { |
4340 | bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0); | |
e0001a05 | 4341 | |
43cd72b9 BW |
4342 | if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide)) |
4343 | { | |
4344 | uint32 value, newval; | |
4345 | int i, operand_count, o_operand_count; | |
4346 | xtensa_opcode o_opcode; | |
e0001a05 | 4347 | |
43cd72b9 BW |
4348 | /* Address does not matter in this case. We might need to |
4349 | fix it to handle branches/jumps. */ | |
4350 | bfd_vma self_address = 0; | |
e0001a05 | 4351 | |
43cd72b9 BW |
4352 | o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow); |
4353 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4354 | return 0; |
43cd72b9 BW |
4355 | o_fmt = get_single_format (o_opcode); |
4356 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4357 | return 0; |
e0001a05 | 4358 | |
43cd72b9 BW |
4359 | if (xtensa_format_length (isa, fmt) != 3 |
4360 | || xtensa_format_length (isa, o_fmt) != 2) | |
64b607e6 | 4361 | return 0; |
e0001a05 | 4362 | |
43cd72b9 BW |
4363 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4364 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4365 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
e0001a05 | 4366 | |
43cd72b9 | 4367 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4368 | return 0; |
e0001a05 | 4369 | |
43cd72b9 BW |
4370 | if (!is_or) |
4371 | { | |
4372 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4373 | return 0; |
43cd72b9 BW |
4374 | } |
4375 | else | |
4376 | { | |
4377 | uint32 rawval0, rawval1, rawval2; | |
e0001a05 | 4378 | |
64b607e6 BW |
4379 | if (o_operand_count + 1 != operand_count |
4380 | || xtensa_operand_get_field (isa, opcode, 0, | |
4381 | fmt, 0, slotbuf, &rawval0) != 0 | |
4382 | || xtensa_operand_get_field (isa, opcode, 1, | |
4383 | fmt, 0, slotbuf, &rawval1) != 0 | |
4384 | || xtensa_operand_get_field (isa, opcode, 2, | |
4385 | fmt, 0, slotbuf, &rawval2) != 0 | |
4386 | || rawval1 != rawval2 | |
4387 | || rawval0 == rawval1 /* it is a nop */) | |
4388 | return 0; | |
43cd72b9 | 4389 | } |
e0001a05 | 4390 | |
43cd72b9 BW |
4391 | for (i = 0; i < o_operand_count; ++i) |
4392 | { | |
4393 | if (xtensa_operand_get_field (isa, opcode, i, fmt, 0, | |
4394 | slotbuf, &value) | |
4395 | || xtensa_operand_decode (isa, opcode, i, &value)) | |
64b607e6 | 4396 | return 0; |
e0001a05 | 4397 | |
43cd72b9 BW |
4398 | /* PC-relative branches need adjustment, but |
4399 | the PC-rel operand will always have a relocation. */ | |
4400 | newval = value; | |
4401 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4402 | self_address) | |
4403 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4404 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4405 | o_slotbuf, newval)) | |
64b607e6 | 4406 | return 0; |
43cd72b9 | 4407 | } |
e0001a05 | 4408 | |
64b607e6 BW |
4409 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) |
4410 | return 0; | |
e0001a05 | 4411 | |
64b607e6 | 4412 | return o_insnbuf; |
43cd72b9 BW |
4413 | } |
4414 | } | |
64b607e6 | 4415 | return 0; |
43cd72b9 | 4416 | } |
e0001a05 | 4417 | |
e0001a05 | 4418 | |
64b607e6 BW |
4419 | /* Attempt to narrow an instruction. If the narrowing is valid, perform |
4420 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4421 | the return value is FALSE and the contents are not modified. */ | |
e0001a05 | 4422 | |
43cd72b9 | 4423 | static bfd_boolean |
64b607e6 BW |
4424 | narrow_instruction (bfd_byte *contents, |
4425 | bfd_size_type content_length, | |
4426 | bfd_size_type offset) | |
e0001a05 | 4427 | { |
43cd72b9 | 4428 | xtensa_opcode opcode; |
64b607e6 | 4429 | bfd_size_type insn_len; |
43cd72b9 | 4430 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4431 | xtensa_format fmt; |
4432 | xtensa_insnbuf o_insnbuf; | |
e0001a05 | 4433 | |
43cd72b9 BW |
4434 | static xtensa_insnbuf insnbuf = NULL; |
4435 | static xtensa_insnbuf slotbuf = NULL; | |
e0001a05 | 4436 | |
43cd72b9 BW |
4437 | if (insnbuf == NULL) |
4438 | { | |
4439 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4440 | slotbuf = xtensa_insnbuf_alloc (isa); | |
43cd72b9 | 4441 | } |
e0001a05 | 4442 | |
43cd72b9 | 4443 | BFD_ASSERT (offset < content_length); |
2c8c90bc | 4444 | |
43cd72b9 | 4445 | if (content_length < 2) |
e0001a05 NC |
4446 | return FALSE; |
4447 | ||
64b607e6 | 4448 | /* We will hand-code a few of these for a little while. |
43cd72b9 BW |
4449 | These have all been specified in the assembler aleady. */ |
4450 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4451 | content_length - offset); | |
4452 | fmt = xtensa_format_decode (isa, insnbuf); | |
4453 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
e0001a05 NC |
4454 | return FALSE; |
4455 | ||
43cd72b9 | 4456 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) |
e0001a05 NC |
4457 | return FALSE; |
4458 | ||
43cd72b9 BW |
4459 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); |
4460 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 4461 | return FALSE; |
43cd72b9 BW |
4462 | insn_len = xtensa_format_length (isa, fmt); |
4463 | if (insn_len > content_length) | |
4464 | return FALSE; | |
4465 | ||
64b607e6 BW |
4466 | o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode); |
4467 | if (o_insnbuf) | |
4468 | { | |
4469 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4470 | content_length - offset); | |
4471 | return TRUE; | |
4472 | } | |
4473 | ||
4474 | return FALSE; | |
4475 | } | |
4476 | ||
4477 | ||
4478 | /* Check if an instruction can be "widened", i.e., changed from a 2-byte | |
4479 | "density" instruction to a standard 3-byte instruction. If it is valid, | |
4480 | return the instruction buffer holding the wide instruction. Otherwise, | |
4481 | return 0. The set of valid widenings are specified by a string table | |
4482 | but require some special case operand checks in some cases. */ | |
4483 | ||
4484 | static xtensa_insnbuf | |
4485 | can_widen_instruction (xtensa_insnbuf slotbuf, | |
4486 | xtensa_format fmt, | |
4487 | xtensa_opcode opcode) | |
4488 | { | |
4489 | xtensa_isa isa = xtensa_default_isa; | |
4490 | xtensa_format o_fmt; | |
4491 | unsigned opi; | |
4492 | ||
4493 | static xtensa_insnbuf o_insnbuf = NULL; | |
4494 | static xtensa_insnbuf o_slotbuf = NULL; | |
4495 | ||
4496 | if (o_insnbuf == NULL) | |
4497 | { | |
4498 | o_insnbuf = xtensa_insnbuf_alloc (isa); | |
4499 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4500 | } | |
4501 | ||
4502 | for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++) | |
e0001a05 | 4503 | { |
43cd72b9 BW |
4504 | bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0); |
4505 | bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0 | |
4506 | || strcmp ("bnez", widenable[opi].wide) == 0); | |
e0001a05 | 4507 | |
43cd72b9 BW |
4508 | if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow)) |
4509 | { | |
4510 | uint32 value, newval; | |
4511 | int i, operand_count, o_operand_count, check_operand_count; | |
4512 | xtensa_opcode o_opcode; | |
e0001a05 | 4513 | |
43cd72b9 BW |
4514 | /* Address does not matter in this case. We might need to fix it |
4515 | to handle branches/jumps. */ | |
4516 | bfd_vma self_address = 0; | |
e0001a05 | 4517 | |
43cd72b9 BW |
4518 | o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide); |
4519 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4520 | return 0; |
43cd72b9 BW |
4521 | o_fmt = get_single_format (o_opcode); |
4522 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4523 | return 0; |
e0001a05 | 4524 | |
43cd72b9 BW |
4525 | if (xtensa_format_length (isa, fmt) != 2 |
4526 | || xtensa_format_length (isa, o_fmt) != 3) | |
64b607e6 | 4527 | return 0; |
e0001a05 | 4528 | |
43cd72b9 BW |
4529 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4530 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4531 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
4532 | check_operand_count = o_operand_count; | |
e0001a05 | 4533 | |
43cd72b9 | 4534 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4535 | return 0; |
e0001a05 | 4536 | |
43cd72b9 BW |
4537 | if (!is_or) |
4538 | { | |
4539 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4540 | return 0; |
43cd72b9 BW |
4541 | } |
4542 | else | |
4543 | { | |
4544 | uint32 rawval0, rawval1; | |
4545 | ||
64b607e6 BW |
4546 | if (o_operand_count != operand_count + 1 |
4547 | || xtensa_operand_get_field (isa, opcode, 0, | |
4548 | fmt, 0, slotbuf, &rawval0) != 0 | |
4549 | || xtensa_operand_get_field (isa, opcode, 1, | |
4550 | fmt, 0, slotbuf, &rawval1) != 0 | |
4551 | || rawval0 == rawval1 /* it is a nop */) | |
4552 | return 0; | |
43cd72b9 BW |
4553 | } |
4554 | if (is_branch) | |
4555 | check_operand_count--; | |
4556 | ||
64b607e6 | 4557 | for (i = 0; i < check_operand_count; i++) |
43cd72b9 BW |
4558 | { |
4559 | int new_i = i; | |
4560 | if (is_or && i == o_operand_count - 1) | |
4561 | new_i = i - 1; | |
4562 | if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0, | |
4563 | slotbuf, &value) | |
4564 | || xtensa_operand_decode (isa, opcode, new_i, &value)) | |
64b607e6 | 4565 | return 0; |
43cd72b9 BW |
4566 | |
4567 | /* PC-relative branches need adjustment, but | |
4568 | the PC-rel operand will always have a relocation. */ | |
4569 | newval = value; | |
4570 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4571 | self_address) | |
4572 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4573 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4574 | o_slotbuf, newval)) | |
64b607e6 | 4575 | return 0; |
43cd72b9 BW |
4576 | } |
4577 | ||
4578 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) | |
64b607e6 | 4579 | return 0; |
43cd72b9 | 4580 | |
64b607e6 | 4581 | return o_insnbuf; |
43cd72b9 BW |
4582 | } |
4583 | } | |
64b607e6 BW |
4584 | return 0; |
4585 | } | |
4586 | ||
4587 | ||
4588 | /* Attempt to widen an instruction. If the widening is valid, perform | |
4589 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4590 | the return value is FALSE and the contents are not modified. */ | |
4591 | ||
4592 | static bfd_boolean | |
4593 | widen_instruction (bfd_byte *contents, | |
4594 | bfd_size_type content_length, | |
4595 | bfd_size_type offset) | |
4596 | { | |
4597 | xtensa_opcode opcode; | |
4598 | bfd_size_type insn_len; | |
4599 | xtensa_isa isa = xtensa_default_isa; | |
4600 | xtensa_format fmt; | |
4601 | xtensa_insnbuf o_insnbuf; | |
4602 | ||
4603 | static xtensa_insnbuf insnbuf = NULL; | |
4604 | static xtensa_insnbuf slotbuf = NULL; | |
4605 | ||
4606 | if (insnbuf == NULL) | |
4607 | { | |
4608 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4609 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4610 | } | |
4611 | ||
4612 | BFD_ASSERT (offset < content_length); | |
4613 | ||
4614 | if (content_length < 2) | |
4615 | return FALSE; | |
4616 | ||
4617 | /* We will hand-code a few of these for a little while. | |
4618 | These have all been specified in the assembler aleady. */ | |
4619 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4620 | content_length - offset); | |
4621 | fmt = xtensa_format_decode (isa, insnbuf); | |
4622 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
4623 | return FALSE; | |
4624 | ||
4625 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) | |
4626 | return FALSE; | |
4627 | ||
4628 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4629 | if (opcode == XTENSA_UNDEFINED) | |
4630 | return FALSE; | |
4631 | insn_len = xtensa_format_length (isa, fmt); | |
4632 | if (insn_len > content_length) | |
4633 | return FALSE; | |
4634 | ||
4635 | o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode); | |
4636 | if (o_insnbuf) | |
4637 | { | |
4638 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4639 | content_length - offset); | |
4640 | return TRUE; | |
4641 | } | |
43cd72b9 | 4642 | return FALSE; |
e0001a05 NC |
4643 | } |
4644 | ||
43cd72b9 BW |
4645 | \f |
4646 | /* Code for transforming CALLs at link-time. */ | |
e0001a05 | 4647 | |
43cd72b9 | 4648 | static bfd_reloc_status_type |
7fa3d080 BW |
4649 | elf_xtensa_do_asm_simplify (bfd_byte *contents, |
4650 | bfd_vma address, | |
4651 | bfd_vma content_length, | |
4652 | char **error_message) | |
e0001a05 | 4653 | { |
43cd72b9 BW |
4654 | static xtensa_insnbuf insnbuf = NULL; |
4655 | static xtensa_insnbuf slotbuf = NULL; | |
4656 | xtensa_format core_format = XTENSA_UNDEFINED; | |
4657 | xtensa_opcode opcode; | |
4658 | xtensa_opcode direct_call_opcode; | |
4659 | xtensa_isa isa = xtensa_default_isa; | |
4660 | bfd_byte *chbuf = contents + address; | |
4661 | int opn; | |
e0001a05 | 4662 | |
43cd72b9 | 4663 | if (insnbuf == NULL) |
e0001a05 | 4664 | { |
43cd72b9 BW |
4665 | insnbuf = xtensa_insnbuf_alloc (isa); |
4666 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4667 | } |
e0001a05 | 4668 | |
43cd72b9 BW |
4669 | if (content_length < address) |
4670 | { | |
4671 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
4672 | return bfd_reloc_other; | |
4673 | } | |
e0001a05 | 4674 | |
43cd72b9 BW |
4675 | opcode = get_expanded_call_opcode (chbuf, content_length - address, 0); |
4676 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
4677 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
4678 | { | |
4679 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
4680 | return bfd_reloc_other; | |
4681 | } | |
4682 | ||
4683 | /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */ | |
4684 | core_format = xtensa_format_lookup (isa, "x24"); | |
4685 | opcode = xtensa_opcode_lookup (isa, "or"); | |
4686 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode); | |
4687 | for (opn = 0; opn < 3; opn++) | |
4688 | { | |
4689 | uint32 regno = 1; | |
4690 | xtensa_operand_encode (isa, opcode, opn, ®no); | |
4691 | xtensa_operand_set_field (isa, opcode, opn, core_format, 0, | |
4692 | slotbuf, regno); | |
4693 | } | |
4694 | xtensa_format_encode (isa, core_format, insnbuf); | |
4695 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4696 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address); | |
e0001a05 | 4697 | |
43cd72b9 BW |
4698 | /* Assemble a CALL ("callN 0") into the 3 byte offset. */ |
4699 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode); | |
4700 | xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0); | |
e0001a05 | 4701 | |
43cd72b9 BW |
4702 | xtensa_format_encode (isa, core_format, insnbuf); |
4703 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4704 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3, | |
4705 | content_length - address - 3); | |
e0001a05 | 4706 | |
43cd72b9 BW |
4707 | return bfd_reloc_ok; |
4708 | } | |
e0001a05 | 4709 | |
e0001a05 | 4710 | |
43cd72b9 | 4711 | static bfd_reloc_status_type |
7fa3d080 BW |
4712 | contract_asm_expansion (bfd_byte *contents, |
4713 | bfd_vma content_length, | |
4714 | Elf_Internal_Rela *irel, | |
4715 | char **error_message) | |
43cd72b9 BW |
4716 | { |
4717 | bfd_reloc_status_type retval = | |
4718 | elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length, | |
4719 | error_message); | |
e0001a05 | 4720 | |
43cd72b9 BW |
4721 | if (retval != bfd_reloc_ok) |
4722 | return bfd_reloc_dangerous; | |
e0001a05 | 4723 | |
43cd72b9 BW |
4724 | /* Update the irel->r_offset field so that the right immediate and |
4725 | the right instruction are modified during the relocation. */ | |
4726 | irel->r_offset += 3; | |
4727 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP); | |
4728 | return bfd_reloc_ok; | |
4729 | } | |
e0001a05 | 4730 | |
e0001a05 | 4731 | |
43cd72b9 | 4732 | static xtensa_opcode |
7fa3d080 | 4733 | swap_callx_for_call_opcode (xtensa_opcode opcode) |
e0001a05 | 4734 | { |
43cd72b9 | 4735 | init_call_opcodes (); |
e0001a05 | 4736 | |
43cd72b9 BW |
4737 | if (opcode == callx0_op) return call0_op; |
4738 | if (opcode == callx4_op) return call4_op; | |
4739 | if (opcode == callx8_op) return call8_op; | |
4740 | if (opcode == callx12_op) return call12_op; | |
e0001a05 | 4741 | |
43cd72b9 BW |
4742 | /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */ |
4743 | return XTENSA_UNDEFINED; | |
4744 | } | |
e0001a05 | 4745 | |
e0001a05 | 4746 | |
43cd72b9 BW |
4747 | /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN; |
4748 | CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode. | |
4749 | If not, return XTENSA_UNDEFINED. */ | |
e0001a05 | 4750 | |
43cd72b9 BW |
4751 | #define L32R_TARGET_REG_OPERAND 0 |
4752 | #define CONST16_TARGET_REG_OPERAND 0 | |
4753 | #define CALLN_SOURCE_OPERAND 0 | |
e0001a05 | 4754 | |
43cd72b9 | 4755 | static xtensa_opcode |
7fa3d080 | 4756 | get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r) |
e0001a05 | 4757 | { |
43cd72b9 BW |
4758 | static xtensa_insnbuf insnbuf = NULL; |
4759 | static xtensa_insnbuf slotbuf = NULL; | |
4760 | xtensa_format fmt; | |
4761 | xtensa_opcode opcode; | |
4762 | xtensa_isa isa = xtensa_default_isa; | |
4763 | uint32 regno, const16_regno, call_regno; | |
4764 | int offset = 0; | |
e0001a05 | 4765 | |
43cd72b9 | 4766 | if (insnbuf == NULL) |
e0001a05 | 4767 | { |
43cd72b9 BW |
4768 | insnbuf = xtensa_insnbuf_alloc (isa); |
4769 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4770 | } |
43cd72b9 BW |
4771 | |
4772 | xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize); | |
4773 | fmt = xtensa_format_decode (isa, insnbuf); | |
4774 | if (fmt == XTENSA_UNDEFINED | |
4775 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4776 | return XTENSA_UNDEFINED; | |
4777 | ||
4778 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4779 | if (opcode == XTENSA_UNDEFINED) | |
4780 | return XTENSA_UNDEFINED; | |
4781 | ||
4782 | if (opcode == get_l32r_opcode ()) | |
e0001a05 | 4783 | { |
43cd72b9 BW |
4784 | if (p_uses_l32r) |
4785 | *p_uses_l32r = TRUE; | |
4786 | if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4787 | fmt, 0, slotbuf, ®no) | |
4788 | || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4789 | ®no)) | |
4790 | return XTENSA_UNDEFINED; | |
e0001a05 | 4791 | } |
43cd72b9 | 4792 | else if (opcode == get_const16_opcode ()) |
e0001a05 | 4793 | { |
43cd72b9 BW |
4794 | if (p_uses_l32r) |
4795 | *p_uses_l32r = FALSE; | |
4796 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4797 | fmt, 0, slotbuf, ®no) | |
4798 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4799 | ®no)) | |
4800 | return XTENSA_UNDEFINED; | |
4801 | ||
4802 | /* Check that the next instruction is also CONST16. */ | |
4803 | offset += xtensa_format_length (isa, fmt); | |
4804 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4805 | fmt = xtensa_format_decode (isa, insnbuf); | |
4806 | if (fmt == XTENSA_UNDEFINED | |
4807 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4808 | return XTENSA_UNDEFINED; | |
4809 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4810 | if (opcode != get_const16_opcode ()) | |
4811 | return XTENSA_UNDEFINED; | |
4812 | ||
4813 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4814 | fmt, 0, slotbuf, &const16_regno) | |
4815 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4816 | &const16_regno) | |
4817 | || const16_regno != regno) | |
4818 | return XTENSA_UNDEFINED; | |
e0001a05 | 4819 | } |
43cd72b9 BW |
4820 | else |
4821 | return XTENSA_UNDEFINED; | |
e0001a05 | 4822 | |
43cd72b9 BW |
4823 | /* Next instruction should be an CALLXn with operand 0 == regno. */ |
4824 | offset += xtensa_format_length (isa, fmt); | |
4825 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4826 | fmt = xtensa_format_decode (isa, insnbuf); | |
4827 | if (fmt == XTENSA_UNDEFINED | |
4828 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4829 | return XTENSA_UNDEFINED; | |
4830 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4831 | if (opcode == XTENSA_UNDEFINED | |
4832 | || !is_indirect_call_opcode (opcode)) | |
4833 | return XTENSA_UNDEFINED; | |
e0001a05 | 4834 | |
43cd72b9 BW |
4835 | if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND, |
4836 | fmt, 0, slotbuf, &call_regno) | |
4837 | || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND, | |
4838 | &call_regno)) | |
4839 | return XTENSA_UNDEFINED; | |
e0001a05 | 4840 | |
43cd72b9 BW |
4841 | if (call_regno != regno) |
4842 | return XTENSA_UNDEFINED; | |
e0001a05 | 4843 | |
43cd72b9 BW |
4844 | return opcode; |
4845 | } | |
e0001a05 | 4846 | |
43cd72b9 BW |
4847 | \f |
4848 | /* Data structures used during relaxation. */ | |
e0001a05 | 4849 | |
43cd72b9 | 4850 | /* r_reloc: relocation values. */ |
e0001a05 | 4851 | |
43cd72b9 BW |
4852 | /* Through the relaxation process, we need to keep track of the values |
4853 | that will result from evaluating relocations. The standard ELF | |
4854 | relocation structure is not sufficient for this purpose because we're | |
4855 | operating on multiple input files at once, so we need to know which | |
4856 | input file a relocation refers to. The r_reloc structure thus | |
4857 | records both the input file (bfd) and ELF relocation. | |
e0001a05 | 4858 | |
43cd72b9 BW |
4859 | For efficiency, an r_reloc also contains a "target_offset" field to |
4860 | cache the target-section-relative offset value that is represented by | |
4861 | the relocation. | |
4862 | ||
4863 | The r_reloc also contains a virtual offset that allows multiple | |
4864 | inserted literals to be placed at the same "address" with | |
4865 | different offsets. */ | |
e0001a05 | 4866 | |
43cd72b9 | 4867 | typedef struct r_reloc_struct r_reloc; |
e0001a05 | 4868 | |
43cd72b9 | 4869 | struct r_reloc_struct |
e0001a05 | 4870 | { |
43cd72b9 BW |
4871 | bfd *abfd; |
4872 | Elf_Internal_Rela rela; | |
e0001a05 | 4873 | bfd_vma target_offset; |
43cd72b9 | 4874 | bfd_vma virtual_offset; |
e0001a05 NC |
4875 | }; |
4876 | ||
e0001a05 | 4877 | |
43cd72b9 BW |
4878 | /* The r_reloc structure is included by value in literal_value, but not |
4879 | every literal_value has an associated relocation -- some are simple | |
4880 | constants. In such cases, we set all the fields in the r_reloc | |
4881 | struct to zero. The r_reloc_is_const function should be used to | |
4882 | detect this case. */ | |
e0001a05 | 4883 | |
43cd72b9 | 4884 | static bfd_boolean |
7fa3d080 | 4885 | r_reloc_is_const (const r_reloc *r_rel) |
e0001a05 | 4886 | { |
43cd72b9 | 4887 | return (r_rel->abfd == NULL); |
e0001a05 NC |
4888 | } |
4889 | ||
4890 | ||
43cd72b9 | 4891 | static bfd_vma |
7fa3d080 | 4892 | r_reloc_get_target_offset (const r_reloc *r_rel) |
e0001a05 | 4893 | { |
43cd72b9 BW |
4894 | bfd_vma target_offset; |
4895 | unsigned long r_symndx; | |
e0001a05 | 4896 | |
43cd72b9 BW |
4897 | BFD_ASSERT (!r_reloc_is_const (r_rel)); |
4898 | r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4899 | target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx); | |
4900 | return (target_offset + r_rel->rela.r_addend); | |
4901 | } | |
e0001a05 | 4902 | |
e0001a05 | 4903 | |
43cd72b9 | 4904 | static struct elf_link_hash_entry * |
7fa3d080 | 4905 | r_reloc_get_hash_entry (const r_reloc *r_rel) |
e0001a05 | 4906 | { |
43cd72b9 BW |
4907 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); |
4908 | return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx); | |
4909 | } | |
e0001a05 | 4910 | |
43cd72b9 BW |
4911 | |
4912 | static asection * | |
7fa3d080 | 4913 | r_reloc_get_section (const r_reloc *r_rel) |
43cd72b9 BW |
4914 | { |
4915 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4916 | return get_elf_r_symndx_section (r_rel->abfd, r_symndx); | |
4917 | } | |
e0001a05 NC |
4918 | |
4919 | ||
4920 | static bfd_boolean | |
7fa3d080 | 4921 | r_reloc_is_defined (const r_reloc *r_rel) |
e0001a05 | 4922 | { |
43cd72b9 BW |
4923 | asection *sec; |
4924 | if (r_rel == NULL) | |
e0001a05 | 4925 | return FALSE; |
e0001a05 | 4926 | |
43cd72b9 BW |
4927 | sec = r_reloc_get_section (r_rel); |
4928 | if (sec == bfd_abs_section_ptr | |
4929 | || sec == bfd_com_section_ptr | |
4930 | || sec == bfd_und_section_ptr) | |
4931 | return FALSE; | |
4932 | return TRUE; | |
e0001a05 NC |
4933 | } |
4934 | ||
4935 | ||
7fa3d080 BW |
4936 | static void |
4937 | r_reloc_init (r_reloc *r_rel, | |
4938 | bfd *abfd, | |
4939 | Elf_Internal_Rela *irel, | |
4940 | bfd_byte *contents, | |
4941 | bfd_size_type content_length) | |
4942 | { | |
4943 | int r_type; | |
4944 | reloc_howto_type *howto; | |
4945 | ||
4946 | if (irel) | |
4947 | { | |
4948 | r_rel->rela = *irel; | |
4949 | r_rel->abfd = abfd; | |
4950 | r_rel->target_offset = r_reloc_get_target_offset (r_rel); | |
4951 | r_rel->virtual_offset = 0; | |
4952 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
4953 | howto = &elf_howto_table[r_type]; | |
4954 | if (howto->partial_inplace) | |
4955 | { | |
4956 | bfd_vma inplace_val; | |
4957 | BFD_ASSERT (r_rel->rela.r_offset < content_length); | |
4958 | ||
4959 | inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]); | |
4960 | r_rel->target_offset += inplace_val; | |
4961 | } | |
4962 | } | |
4963 | else | |
4964 | memset (r_rel, 0, sizeof (r_reloc)); | |
4965 | } | |
4966 | ||
4967 | ||
43cd72b9 BW |
4968 | #if DEBUG |
4969 | ||
e0001a05 | 4970 | static void |
7fa3d080 | 4971 | print_r_reloc (FILE *fp, const r_reloc *r_rel) |
e0001a05 | 4972 | { |
43cd72b9 BW |
4973 | if (r_reloc_is_defined (r_rel)) |
4974 | { | |
4975 | asection *sec = r_reloc_get_section (r_rel); | |
4976 | fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name); | |
4977 | } | |
4978 | else if (r_reloc_get_hash_entry (r_rel)) | |
4979 | fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string); | |
4980 | else | |
4981 | fprintf (fp, " ?? + "); | |
e0001a05 | 4982 | |
43cd72b9 BW |
4983 | fprintf_vma (fp, r_rel->target_offset); |
4984 | if (r_rel->virtual_offset) | |
4985 | { | |
4986 | fprintf (fp, " + "); | |
4987 | fprintf_vma (fp, r_rel->virtual_offset); | |
4988 | } | |
4989 | ||
4990 | fprintf (fp, ")"); | |
4991 | } | |
e0001a05 | 4992 | |
43cd72b9 | 4993 | #endif /* DEBUG */ |
e0001a05 | 4994 | |
43cd72b9 BW |
4995 | \f |
4996 | /* source_reloc: relocations that reference literals. */ | |
e0001a05 | 4997 | |
43cd72b9 BW |
4998 | /* To determine whether literals can be coalesced, we need to first |
4999 | record all the relocations that reference the literals. The | |
5000 | source_reloc structure below is used for this purpose. The | |
5001 | source_reloc entries are kept in a per-literal-section array, sorted | |
5002 | by offset within the literal section (i.e., target offset). | |
e0001a05 | 5003 | |
43cd72b9 BW |
5004 | The source_sec and r_rel.rela.r_offset fields identify the source of |
5005 | the relocation. The r_rel field records the relocation value, i.e., | |
5006 | the offset of the literal being referenced. The opnd field is needed | |
5007 | to determine the range of the immediate field to which the relocation | |
5008 | applies, so we can determine whether another literal with the same | |
5009 | value is within range. The is_null field is true when the relocation | |
5010 | is being removed (e.g., when an L32R is being removed due to a CALLX | |
5011 | that is converted to a direct CALL). */ | |
e0001a05 | 5012 | |
43cd72b9 BW |
5013 | typedef struct source_reloc_struct source_reloc; |
5014 | ||
5015 | struct source_reloc_struct | |
e0001a05 | 5016 | { |
43cd72b9 BW |
5017 | asection *source_sec; |
5018 | r_reloc r_rel; | |
5019 | xtensa_opcode opcode; | |
5020 | int opnd; | |
5021 | bfd_boolean is_null; | |
5022 | bfd_boolean is_abs_literal; | |
5023 | }; | |
e0001a05 | 5024 | |
e0001a05 | 5025 | |
e0001a05 | 5026 | static void |
7fa3d080 BW |
5027 | init_source_reloc (source_reloc *reloc, |
5028 | asection *source_sec, | |
5029 | const r_reloc *r_rel, | |
5030 | xtensa_opcode opcode, | |
5031 | int opnd, | |
5032 | bfd_boolean is_abs_literal) | |
e0001a05 | 5033 | { |
43cd72b9 BW |
5034 | reloc->source_sec = source_sec; |
5035 | reloc->r_rel = *r_rel; | |
5036 | reloc->opcode = opcode; | |
5037 | reloc->opnd = opnd; | |
5038 | reloc->is_null = FALSE; | |
5039 | reloc->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
5040 | } |
5041 | ||
e0001a05 | 5042 | |
43cd72b9 BW |
5043 | /* Find the source_reloc for a particular source offset and relocation |
5044 | type. Note that the array is sorted by _target_ offset, so this is | |
5045 | just a linear search. */ | |
e0001a05 | 5046 | |
43cd72b9 | 5047 | static source_reloc * |
7fa3d080 BW |
5048 | find_source_reloc (source_reloc *src_relocs, |
5049 | int src_count, | |
5050 | asection *sec, | |
5051 | Elf_Internal_Rela *irel) | |
e0001a05 | 5052 | { |
43cd72b9 | 5053 | int i; |
e0001a05 | 5054 | |
43cd72b9 BW |
5055 | for (i = 0; i < src_count; i++) |
5056 | { | |
5057 | if (src_relocs[i].source_sec == sec | |
5058 | && src_relocs[i].r_rel.rela.r_offset == irel->r_offset | |
5059 | && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info) | |
5060 | == ELF32_R_TYPE (irel->r_info))) | |
5061 | return &src_relocs[i]; | |
5062 | } | |
e0001a05 | 5063 | |
43cd72b9 | 5064 | return NULL; |
e0001a05 NC |
5065 | } |
5066 | ||
5067 | ||
43cd72b9 | 5068 | static int |
7fa3d080 | 5069 | source_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 5070 | { |
43cd72b9 BW |
5071 | const source_reloc *a = (const source_reloc *) ap; |
5072 | const source_reloc *b = (const source_reloc *) bp; | |
e0001a05 | 5073 | |
43cd72b9 BW |
5074 | if (a->r_rel.target_offset != b->r_rel.target_offset) |
5075 | return (a->r_rel.target_offset - b->r_rel.target_offset); | |
e0001a05 | 5076 | |
43cd72b9 BW |
5077 | /* We don't need to sort on these criteria for correctness, |
5078 | but enforcing a more strict ordering prevents unstable qsort | |
5079 | from behaving differently with different implementations. | |
5080 | Without the code below we get correct but different results | |
5081 | on Solaris 2.7 and 2.8. We would like to always produce the | |
5082 | same results no matter the host. */ | |
5083 | ||
5084 | if ((!a->is_null) - (!b->is_null)) | |
5085 | return ((!a->is_null) - (!b->is_null)); | |
5086 | return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela); | |
e0001a05 NC |
5087 | } |
5088 | ||
43cd72b9 BW |
5089 | \f |
5090 | /* Literal values and value hash tables. */ | |
e0001a05 | 5091 | |
43cd72b9 BW |
5092 | /* Literals with the same value can be coalesced. The literal_value |
5093 | structure records the value of a literal: the "r_rel" field holds the | |
5094 | information from the relocation on the literal (if there is one) and | |
5095 | the "value" field holds the contents of the literal word itself. | |
e0001a05 | 5096 | |
43cd72b9 BW |
5097 | The value_map structure records a literal value along with the |
5098 | location of a literal holding that value. The value_map hash table | |
5099 | is indexed by the literal value, so that we can quickly check if a | |
5100 | particular literal value has been seen before and is thus a candidate | |
5101 | for coalescing. */ | |
e0001a05 | 5102 | |
43cd72b9 BW |
5103 | typedef struct literal_value_struct literal_value; |
5104 | typedef struct value_map_struct value_map; | |
5105 | typedef struct value_map_hash_table_struct value_map_hash_table; | |
e0001a05 | 5106 | |
43cd72b9 | 5107 | struct literal_value_struct |
e0001a05 | 5108 | { |
43cd72b9 BW |
5109 | r_reloc r_rel; |
5110 | unsigned long value; | |
5111 | bfd_boolean is_abs_literal; | |
5112 | }; | |
5113 | ||
5114 | struct value_map_struct | |
5115 | { | |
5116 | literal_value val; /* The literal value. */ | |
5117 | r_reloc loc; /* Location of the literal. */ | |
5118 | value_map *next; | |
5119 | }; | |
5120 | ||
5121 | struct value_map_hash_table_struct | |
5122 | { | |
5123 | unsigned bucket_count; | |
5124 | value_map **buckets; | |
5125 | unsigned count; | |
5126 | bfd_boolean has_last_loc; | |
5127 | r_reloc last_loc; | |
5128 | }; | |
5129 | ||
5130 | ||
e0001a05 | 5131 | static void |
7fa3d080 BW |
5132 | init_literal_value (literal_value *lit, |
5133 | const r_reloc *r_rel, | |
5134 | unsigned long value, | |
5135 | bfd_boolean is_abs_literal) | |
e0001a05 | 5136 | { |
43cd72b9 BW |
5137 | lit->r_rel = *r_rel; |
5138 | lit->value = value; | |
5139 | lit->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
5140 | } |
5141 | ||
5142 | ||
43cd72b9 | 5143 | static bfd_boolean |
7fa3d080 BW |
5144 | literal_value_equal (const literal_value *src1, |
5145 | const literal_value *src2, | |
5146 | bfd_boolean final_static_link) | |
e0001a05 | 5147 | { |
43cd72b9 | 5148 | struct elf_link_hash_entry *h1, *h2; |
e0001a05 | 5149 | |
43cd72b9 BW |
5150 | if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel)) |
5151 | return FALSE; | |
e0001a05 | 5152 | |
43cd72b9 BW |
5153 | if (r_reloc_is_const (&src1->r_rel)) |
5154 | return (src1->value == src2->value); | |
e0001a05 | 5155 | |
43cd72b9 BW |
5156 | if (ELF32_R_TYPE (src1->r_rel.rela.r_info) |
5157 | != ELF32_R_TYPE (src2->r_rel.rela.r_info)) | |
5158 | return FALSE; | |
e0001a05 | 5159 | |
43cd72b9 BW |
5160 | if (src1->r_rel.target_offset != src2->r_rel.target_offset) |
5161 | return FALSE; | |
5162 | ||
5163 | if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset) | |
5164 | return FALSE; | |
5165 | ||
5166 | if (src1->value != src2->value) | |
5167 | return FALSE; | |
5168 | ||
5169 | /* Now check for the same section (if defined) or the same elf_hash | |
5170 | (if undefined or weak). */ | |
5171 | h1 = r_reloc_get_hash_entry (&src1->r_rel); | |
5172 | h2 = r_reloc_get_hash_entry (&src2->r_rel); | |
5173 | if (r_reloc_is_defined (&src1->r_rel) | |
5174 | && (final_static_link | |
5175 | || ((!h1 || h1->root.type != bfd_link_hash_defweak) | |
5176 | && (!h2 || h2->root.type != bfd_link_hash_defweak)))) | |
5177 | { | |
5178 | if (r_reloc_get_section (&src1->r_rel) | |
5179 | != r_reloc_get_section (&src2->r_rel)) | |
5180 | return FALSE; | |
5181 | } | |
5182 | else | |
5183 | { | |
5184 | /* Require that the hash entries (i.e., symbols) be identical. */ | |
5185 | if (h1 != h2 || h1 == 0) | |
5186 | return FALSE; | |
5187 | } | |
5188 | ||
5189 | if (src1->is_abs_literal != src2->is_abs_literal) | |
5190 | return FALSE; | |
5191 | ||
5192 | return TRUE; | |
e0001a05 NC |
5193 | } |
5194 | ||
e0001a05 | 5195 | |
43cd72b9 BW |
5196 | /* Must be power of 2. */ |
5197 | #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024 | |
e0001a05 | 5198 | |
43cd72b9 | 5199 | static value_map_hash_table * |
7fa3d080 | 5200 | value_map_hash_table_init (void) |
43cd72b9 BW |
5201 | { |
5202 | value_map_hash_table *values; | |
e0001a05 | 5203 | |
43cd72b9 BW |
5204 | values = (value_map_hash_table *) |
5205 | bfd_zmalloc (sizeof (value_map_hash_table)); | |
5206 | values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT; | |
5207 | values->count = 0; | |
5208 | values->buckets = (value_map **) | |
5209 | bfd_zmalloc (sizeof (value_map *) * values->bucket_count); | |
5210 | if (values->buckets == NULL) | |
5211 | { | |
5212 | free (values); | |
5213 | return NULL; | |
5214 | } | |
5215 | values->has_last_loc = FALSE; | |
5216 | ||
5217 | return values; | |
5218 | } | |
5219 | ||
5220 | ||
5221 | static void | |
7fa3d080 | 5222 | value_map_hash_table_delete (value_map_hash_table *table) |
e0001a05 | 5223 | { |
43cd72b9 BW |
5224 | free (table->buckets); |
5225 | free (table); | |
5226 | } | |
5227 | ||
5228 | ||
5229 | static unsigned | |
7fa3d080 | 5230 | hash_bfd_vma (bfd_vma val) |
43cd72b9 BW |
5231 | { |
5232 | return (val >> 2) + (val >> 10); | |
5233 | } | |
5234 | ||
5235 | ||
5236 | static unsigned | |
7fa3d080 | 5237 | literal_value_hash (const literal_value *src) |
43cd72b9 BW |
5238 | { |
5239 | unsigned hash_val; | |
e0001a05 | 5240 | |
43cd72b9 BW |
5241 | hash_val = hash_bfd_vma (src->value); |
5242 | if (!r_reloc_is_const (&src->r_rel)) | |
e0001a05 | 5243 | { |
43cd72b9 BW |
5244 | void *sec_or_hash; |
5245 | ||
5246 | hash_val += hash_bfd_vma (src->is_abs_literal * 1000); | |
5247 | hash_val += hash_bfd_vma (src->r_rel.target_offset); | |
5248 | hash_val += hash_bfd_vma (src->r_rel.virtual_offset); | |
5249 | ||
5250 | /* Now check for the same section and the same elf_hash. */ | |
5251 | if (r_reloc_is_defined (&src->r_rel)) | |
5252 | sec_or_hash = r_reloc_get_section (&src->r_rel); | |
5253 | else | |
5254 | sec_or_hash = r_reloc_get_hash_entry (&src->r_rel); | |
f60ca5e3 | 5255 | hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash); |
e0001a05 | 5256 | } |
43cd72b9 BW |
5257 | return hash_val; |
5258 | } | |
e0001a05 | 5259 | |
e0001a05 | 5260 | |
43cd72b9 | 5261 | /* Check if the specified literal_value has been seen before. */ |
e0001a05 | 5262 | |
43cd72b9 | 5263 | static value_map * |
7fa3d080 BW |
5264 | value_map_get_cached_value (value_map_hash_table *map, |
5265 | const literal_value *val, | |
5266 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5267 | { |
5268 | value_map *map_e; | |
5269 | value_map *bucket; | |
5270 | unsigned idx; | |
5271 | ||
5272 | idx = literal_value_hash (val); | |
5273 | idx = idx & (map->bucket_count - 1); | |
5274 | bucket = map->buckets[idx]; | |
5275 | for (map_e = bucket; map_e; map_e = map_e->next) | |
e0001a05 | 5276 | { |
43cd72b9 BW |
5277 | if (literal_value_equal (&map_e->val, val, final_static_link)) |
5278 | return map_e; | |
5279 | } | |
5280 | return NULL; | |
5281 | } | |
e0001a05 | 5282 | |
e0001a05 | 5283 | |
43cd72b9 BW |
5284 | /* Record a new literal value. It is illegal to call this if VALUE |
5285 | already has an entry here. */ | |
5286 | ||
5287 | static value_map * | |
7fa3d080 BW |
5288 | add_value_map (value_map_hash_table *map, |
5289 | const literal_value *val, | |
5290 | const r_reloc *loc, | |
5291 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5292 | { |
5293 | value_map **bucket_p; | |
5294 | unsigned idx; | |
5295 | ||
5296 | value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map)); | |
5297 | if (val_e == NULL) | |
5298 | { | |
5299 | bfd_set_error (bfd_error_no_memory); | |
5300 | return NULL; | |
e0001a05 NC |
5301 | } |
5302 | ||
43cd72b9 BW |
5303 | BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link)); |
5304 | val_e->val = *val; | |
5305 | val_e->loc = *loc; | |
5306 | ||
5307 | idx = literal_value_hash (val); | |
5308 | idx = idx & (map->bucket_count - 1); | |
5309 | bucket_p = &map->buckets[idx]; | |
5310 | ||
5311 | val_e->next = *bucket_p; | |
5312 | *bucket_p = val_e; | |
5313 | map->count++; | |
5314 | /* FIXME: Consider resizing the hash table if we get too many entries. */ | |
5315 | ||
5316 | return val_e; | |
e0001a05 NC |
5317 | } |
5318 | ||
43cd72b9 BW |
5319 | \f |
5320 | /* Lists of text actions (ta_) for narrowing, widening, longcall | |
5321 | conversion, space fill, code & literal removal, etc. */ | |
5322 | ||
5323 | /* The following text actions are generated: | |
5324 | ||
5325 | "ta_remove_insn" remove an instruction or instructions | |
5326 | "ta_remove_longcall" convert longcall to call | |
5327 | "ta_convert_longcall" convert longcall to nop/call | |
5328 | "ta_narrow_insn" narrow a wide instruction | |
5329 | "ta_widen" widen a narrow instruction | |
5330 | "ta_fill" add fill or remove fill | |
5331 | removed < 0 is a fill; branches to the fill address will be | |
5332 | changed to address + fill size (e.g., address - removed) | |
5333 | removed >= 0 branches to the fill address will stay unchanged | |
5334 | "ta_remove_literal" remove a literal; this action is | |
5335 | indicated when a literal is removed | |
5336 | or replaced. | |
5337 | "ta_add_literal" insert a new literal; this action is | |
5338 | indicated when a literal has been moved. | |
5339 | It may use a virtual_offset because | |
5340 | multiple literals can be placed at the | |
5341 | same location. | |
5342 | ||
5343 | For each of these text actions, we also record the number of bytes | |
5344 | removed by performing the text action. In the case of a "ta_widen" | |
5345 | or a "ta_fill" that adds space, the removed_bytes will be negative. */ | |
5346 | ||
5347 | typedef struct text_action_struct text_action; | |
5348 | typedef struct text_action_list_struct text_action_list; | |
5349 | typedef enum text_action_enum_t text_action_t; | |
5350 | ||
5351 | enum text_action_enum_t | |
5352 | { | |
5353 | ta_none, | |
5354 | ta_remove_insn, /* removed = -size */ | |
5355 | ta_remove_longcall, /* removed = -size */ | |
5356 | ta_convert_longcall, /* removed = 0 */ | |
5357 | ta_narrow_insn, /* removed = -1 */ | |
5358 | ta_widen_insn, /* removed = +1 */ | |
5359 | ta_fill, /* removed = +size */ | |
5360 | ta_remove_literal, | |
5361 | ta_add_literal | |
5362 | }; | |
e0001a05 | 5363 | |
e0001a05 | 5364 | |
43cd72b9 BW |
5365 | /* Structure for a text action record. */ |
5366 | struct text_action_struct | |
e0001a05 | 5367 | { |
43cd72b9 BW |
5368 | text_action_t action; |
5369 | asection *sec; /* Optional */ | |
5370 | bfd_vma offset; | |
5371 | bfd_vma virtual_offset; /* Zero except for adding literals. */ | |
5372 | int removed_bytes; | |
5373 | literal_value value; /* Only valid when adding literals. */ | |
e0001a05 | 5374 | |
43cd72b9 BW |
5375 | text_action *next; |
5376 | }; | |
e0001a05 | 5377 | |
e0001a05 | 5378 | |
43cd72b9 BW |
5379 | /* List of all of the actions taken on a text section. */ |
5380 | struct text_action_list_struct | |
5381 | { | |
5382 | text_action *head; | |
5383 | }; | |
e0001a05 | 5384 | |
e0001a05 | 5385 | |
7fa3d080 BW |
5386 | static text_action * |
5387 | find_fill_action (text_action_list *l, asection *sec, bfd_vma offset) | |
43cd72b9 BW |
5388 | { |
5389 | text_action **m_p; | |
5390 | ||
5391 | /* It is not necessary to fill at the end of a section. */ | |
5392 | if (sec->size == offset) | |
5393 | return NULL; | |
5394 | ||
7fa3d080 | 5395 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
5396 | { |
5397 | text_action *t = *m_p; | |
5398 | /* When the action is another fill at the same address, | |
5399 | just increase the size. */ | |
5400 | if (t->offset == offset && t->action == ta_fill) | |
5401 | return t; | |
5402 | } | |
5403 | return NULL; | |
5404 | } | |
5405 | ||
5406 | ||
5407 | static int | |
7fa3d080 BW |
5408 | compute_removed_action_diff (const text_action *ta, |
5409 | asection *sec, | |
5410 | bfd_vma offset, | |
5411 | int removed, | |
5412 | int removable_space) | |
43cd72b9 BW |
5413 | { |
5414 | int new_removed; | |
5415 | int current_removed = 0; | |
5416 | ||
7fa3d080 | 5417 | if (ta) |
43cd72b9 BW |
5418 | current_removed = ta->removed_bytes; |
5419 | ||
5420 | BFD_ASSERT (ta == NULL || ta->offset == offset); | |
5421 | BFD_ASSERT (ta == NULL || ta->action == ta_fill); | |
5422 | ||
5423 | /* It is not necessary to fill at the end of a section. Clean this up. */ | |
5424 | if (sec->size == offset) | |
5425 | new_removed = removable_space - 0; | |
5426 | else | |
5427 | { | |
5428 | int space; | |
5429 | int added = -removed - current_removed; | |
5430 | /* Ignore multiples of the section alignment. */ | |
5431 | added = ((1 << sec->alignment_power) - 1) & added; | |
5432 | new_removed = (-added); | |
5433 | ||
5434 | /* Modify for removable. */ | |
5435 | space = removable_space - new_removed; | |
5436 | new_removed = (removable_space | |
5437 | - (((1 << sec->alignment_power) - 1) & space)); | |
5438 | } | |
5439 | return (new_removed - current_removed); | |
5440 | } | |
5441 | ||
5442 | ||
7fa3d080 BW |
5443 | static void |
5444 | adjust_fill_action (text_action *ta, int fill_diff) | |
43cd72b9 BW |
5445 | { |
5446 | ta->removed_bytes += fill_diff; | |
5447 | } | |
5448 | ||
5449 | ||
5450 | /* Add a modification action to the text. For the case of adding or | |
5451 | removing space, modify any current fill and assume that | |
5452 | "unreachable_space" bytes can be freely contracted. Note that a | |
5453 | negative removed value is a fill. */ | |
5454 | ||
5455 | static void | |
7fa3d080 BW |
5456 | text_action_add (text_action_list *l, |
5457 | text_action_t action, | |
5458 | asection *sec, | |
5459 | bfd_vma offset, | |
5460 | int removed) | |
43cd72b9 BW |
5461 | { |
5462 | text_action **m_p; | |
5463 | text_action *ta; | |
5464 | ||
5465 | /* It is not necessary to fill at the end of a section. */ | |
5466 | if (action == ta_fill && sec->size == offset) | |
5467 | return; | |
5468 | ||
5469 | /* It is not necessary to fill 0 bytes. */ | |
5470 | if (action == ta_fill && removed == 0) | |
5471 | return; | |
5472 | ||
7fa3d080 | 5473 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
5474 | { |
5475 | text_action *t = *m_p; | |
658ff993 SA |
5476 | |
5477 | if (action == ta_fill) | |
43cd72b9 | 5478 | { |
658ff993 SA |
5479 | /* When the action is another fill at the same address, |
5480 | just increase the size. */ | |
5481 | if (t->offset == offset && t->action == ta_fill) | |
5482 | { | |
5483 | t->removed_bytes += removed; | |
5484 | return; | |
5485 | } | |
5486 | /* Fills need to happen before widens so that we don't | |
5487 | insert fill bytes into the instruction stream. */ | |
5488 | if (t->offset == offset && t->action == ta_widen_insn) | |
5489 | break; | |
43cd72b9 BW |
5490 | } |
5491 | } | |
5492 | ||
5493 | /* Create a new record and fill it up. */ | |
5494 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
5495 | ta->action = action; | |
5496 | ta->sec = sec; | |
5497 | ta->offset = offset; | |
5498 | ta->removed_bytes = removed; | |
5499 | ta->next = (*m_p); | |
5500 | *m_p = ta; | |
5501 | } | |
5502 | ||
5503 | ||
5504 | static void | |
7fa3d080 BW |
5505 | text_action_add_literal (text_action_list *l, |
5506 | text_action_t action, | |
5507 | const r_reloc *loc, | |
5508 | const literal_value *value, | |
5509 | int removed) | |
43cd72b9 BW |
5510 | { |
5511 | text_action **m_p; | |
5512 | text_action *ta; | |
5513 | asection *sec = r_reloc_get_section (loc); | |
5514 | bfd_vma offset = loc->target_offset; | |
5515 | bfd_vma virtual_offset = loc->virtual_offset; | |
5516 | ||
5517 | BFD_ASSERT (action == ta_add_literal); | |
5518 | ||
5519 | for (m_p = &l->head; *m_p != NULL; m_p = &(*m_p)->next) | |
5520 | { | |
5521 | if ((*m_p)->offset > offset | |
5522 | && ((*m_p)->offset != offset | |
5523 | || (*m_p)->virtual_offset > virtual_offset)) | |
5524 | break; | |
5525 | } | |
5526 | ||
5527 | /* Create a new record and fill it up. */ | |
5528 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
5529 | ta->action = action; | |
5530 | ta->sec = sec; | |
5531 | ta->offset = offset; | |
5532 | ta->virtual_offset = virtual_offset; | |
5533 | ta->value = *value; | |
5534 | ta->removed_bytes = removed; | |
5535 | ta->next = (*m_p); | |
5536 | *m_p = ta; | |
5537 | } | |
5538 | ||
5539 | ||
03669f1c BW |
5540 | /* Find the total offset adjustment for the relaxations specified by |
5541 | text_actions, beginning from a particular starting action. This is | |
5542 | typically used from offset_with_removed_text to search an entire list of | |
5543 | actions, but it may also be called directly when adjusting adjacent offsets | |
5544 | so that each search may begin where the previous one left off. */ | |
5545 | ||
5546 | static int | |
5547 | removed_by_actions (text_action **p_start_action, | |
5548 | bfd_vma offset, | |
5549 | bfd_boolean before_fill) | |
43cd72b9 BW |
5550 | { |
5551 | text_action *r; | |
5552 | int removed = 0; | |
5553 | ||
03669f1c BW |
5554 | r = *p_start_action; |
5555 | while (r) | |
43cd72b9 | 5556 | { |
03669f1c BW |
5557 | if (r->offset > offset) |
5558 | break; | |
5559 | ||
5560 | if (r->offset == offset | |
5561 | && (before_fill || r->action != ta_fill || r->removed_bytes >= 0)) | |
5562 | break; | |
5563 | ||
5564 | removed += r->removed_bytes; | |
5565 | ||
5566 | r = r->next; | |
43cd72b9 BW |
5567 | } |
5568 | ||
03669f1c BW |
5569 | *p_start_action = r; |
5570 | return removed; | |
5571 | } | |
5572 | ||
5573 | ||
5574 | static bfd_vma | |
5575 | offset_with_removed_text (text_action_list *action_list, bfd_vma offset) | |
5576 | { | |
5577 | text_action *r = action_list->head; | |
5578 | return offset - removed_by_actions (&r, offset, FALSE); | |
43cd72b9 BW |
5579 | } |
5580 | ||
5581 | ||
03e94c08 BW |
5582 | static unsigned |
5583 | action_list_count (text_action_list *action_list) | |
5584 | { | |
5585 | text_action *r = action_list->head; | |
5586 | unsigned count = 0; | |
5587 | for (r = action_list->head; r != NULL; r = r->next) | |
5588 | { | |
5589 | count++; | |
5590 | } | |
5591 | return count; | |
5592 | } | |
5593 | ||
5594 | ||
43cd72b9 BW |
5595 | /* The find_insn_action routine will only find non-fill actions. */ |
5596 | ||
7fa3d080 BW |
5597 | static text_action * |
5598 | find_insn_action (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 BW |
5599 | { |
5600 | text_action *t; | |
5601 | for (t = action_list->head; t; t = t->next) | |
5602 | { | |
5603 | if (t->offset == offset) | |
5604 | { | |
5605 | switch (t->action) | |
5606 | { | |
5607 | case ta_none: | |
5608 | case ta_fill: | |
5609 | break; | |
5610 | case ta_remove_insn: | |
5611 | case ta_remove_longcall: | |
5612 | case ta_convert_longcall: | |
5613 | case ta_narrow_insn: | |
5614 | case ta_widen_insn: | |
5615 | return t; | |
5616 | case ta_remove_literal: | |
5617 | case ta_add_literal: | |
5618 | BFD_ASSERT (0); | |
5619 | break; | |
5620 | } | |
5621 | } | |
5622 | } | |
5623 | return NULL; | |
5624 | } | |
5625 | ||
5626 | ||
5627 | #if DEBUG | |
5628 | ||
5629 | static void | |
7fa3d080 | 5630 | print_action_list (FILE *fp, text_action_list *action_list) |
43cd72b9 BW |
5631 | { |
5632 | text_action *r; | |
5633 | ||
5634 | fprintf (fp, "Text Action\n"); | |
5635 | for (r = action_list->head; r != NULL; r = r->next) | |
5636 | { | |
5637 | const char *t = "unknown"; | |
5638 | switch (r->action) | |
5639 | { | |
5640 | case ta_remove_insn: | |
5641 | t = "remove_insn"; break; | |
5642 | case ta_remove_longcall: | |
5643 | t = "remove_longcall"; break; | |
5644 | case ta_convert_longcall: | |
c46082c8 | 5645 | t = "convert_longcall"; break; |
43cd72b9 BW |
5646 | case ta_narrow_insn: |
5647 | t = "narrow_insn"; break; | |
5648 | case ta_widen_insn: | |
5649 | t = "widen_insn"; break; | |
5650 | case ta_fill: | |
5651 | t = "fill"; break; | |
5652 | case ta_none: | |
5653 | t = "none"; break; | |
5654 | case ta_remove_literal: | |
5655 | t = "remove_literal"; break; | |
5656 | case ta_add_literal: | |
5657 | t = "add_literal"; break; | |
5658 | } | |
5659 | ||
5660 | fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n", | |
5661 | r->sec->owner->filename, | |
5662 | r->sec->name, r->offset, t, r->removed_bytes); | |
5663 | } | |
5664 | } | |
5665 | ||
5666 | #endif /* DEBUG */ | |
5667 | ||
5668 | \f | |
5669 | /* Lists of literals being coalesced or removed. */ | |
5670 | ||
5671 | /* In the usual case, the literal identified by "from" is being | |
5672 | coalesced with another literal identified by "to". If the literal is | |
5673 | unused and is being removed altogether, "to.abfd" will be NULL. | |
5674 | The removed_literal entries are kept on a per-section list, sorted | |
5675 | by the "from" offset field. */ | |
5676 | ||
5677 | typedef struct removed_literal_struct removed_literal; | |
5678 | typedef struct removed_literal_list_struct removed_literal_list; | |
5679 | ||
5680 | struct removed_literal_struct | |
5681 | { | |
5682 | r_reloc from; | |
5683 | r_reloc to; | |
5684 | removed_literal *next; | |
5685 | }; | |
5686 | ||
5687 | struct removed_literal_list_struct | |
5688 | { | |
5689 | removed_literal *head; | |
5690 | removed_literal *tail; | |
5691 | }; | |
5692 | ||
5693 | ||
43cd72b9 BW |
5694 | /* Record that the literal at "from" is being removed. If "to" is not |
5695 | NULL, the "from" literal is being coalesced with the "to" literal. */ | |
5696 | ||
5697 | static void | |
7fa3d080 BW |
5698 | add_removed_literal (removed_literal_list *removed_list, |
5699 | const r_reloc *from, | |
5700 | const r_reloc *to) | |
43cd72b9 BW |
5701 | { |
5702 | removed_literal *r, *new_r, *next_r; | |
5703 | ||
5704 | new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal)); | |
5705 | ||
5706 | new_r->from = *from; | |
5707 | if (to) | |
5708 | new_r->to = *to; | |
5709 | else | |
5710 | new_r->to.abfd = NULL; | |
5711 | new_r->next = NULL; | |
5712 | ||
5713 | r = removed_list->head; | |
5714 | if (r == NULL) | |
5715 | { | |
5716 | removed_list->head = new_r; | |
5717 | removed_list->tail = new_r; | |
5718 | } | |
5719 | /* Special check for common case of append. */ | |
5720 | else if (removed_list->tail->from.target_offset < from->target_offset) | |
5721 | { | |
5722 | removed_list->tail->next = new_r; | |
5723 | removed_list->tail = new_r; | |
5724 | } | |
5725 | else | |
5726 | { | |
7fa3d080 | 5727 | while (r->from.target_offset < from->target_offset && r->next) |
43cd72b9 BW |
5728 | { |
5729 | r = r->next; | |
5730 | } | |
5731 | next_r = r->next; | |
5732 | r->next = new_r; | |
5733 | new_r->next = next_r; | |
5734 | if (next_r == NULL) | |
5735 | removed_list->tail = new_r; | |
5736 | } | |
5737 | } | |
5738 | ||
5739 | ||
5740 | /* Check if the list of removed literals contains an entry for the | |
5741 | given address. Return the entry if found. */ | |
5742 | ||
5743 | static removed_literal * | |
7fa3d080 | 5744 | find_removed_literal (removed_literal_list *removed_list, bfd_vma addr) |
43cd72b9 BW |
5745 | { |
5746 | removed_literal *r = removed_list->head; | |
5747 | while (r && r->from.target_offset < addr) | |
5748 | r = r->next; | |
5749 | if (r && r->from.target_offset == addr) | |
5750 | return r; | |
5751 | return NULL; | |
5752 | } | |
5753 | ||
5754 | ||
5755 | #if DEBUG | |
5756 | ||
5757 | static void | |
7fa3d080 | 5758 | print_removed_literals (FILE *fp, removed_literal_list *removed_list) |
43cd72b9 BW |
5759 | { |
5760 | removed_literal *r; | |
5761 | r = removed_list->head; | |
5762 | if (r) | |
5763 | fprintf (fp, "Removed Literals\n"); | |
5764 | for (; r != NULL; r = r->next) | |
5765 | { | |
5766 | print_r_reloc (fp, &r->from); | |
5767 | fprintf (fp, " => "); | |
5768 | if (r->to.abfd == NULL) | |
5769 | fprintf (fp, "REMOVED"); | |
5770 | else | |
5771 | print_r_reloc (fp, &r->to); | |
5772 | fprintf (fp, "\n"); | |
5773 | } | |
5774 | } | |
5775 | ||
5776 | #endif /* DEBUG */ | |
5777 | ||
5778 | \f | |
5779 | /* Per-section data for relaxation. */ | |
5780 | ||
5781 | typedef struct reloc_bfd_fix_struct reloc_bfd_fix; | |
5782 | ||
5783 | struct xtensa_relax_info_struct | |
5784 | { | |
5785 | bfd_boolean is_relaxable_literal_section; | |
5786 | bfd_boolean is_relaxable_asm_section; | |
5787 | int visited; /* Number of times visited. */ | |
5788 | ||
5789 | source_reloc *src_relocs; /* Array[src_count]. */ | |
5790 | int src_count; | |
5791 | int src_next; /* Next src_relocs entry to assign. */ | |
5792 | ||
5793 | removed_literal_list removed_list; | |
5794 | text_action_list action_list; | |
5795 | ||
5796 | reloc_bfd_fix *fix_list; | |
5797 | reloc_bfd_fix *fix_array; | |
5798 | unsigned fix_array_count; | |
5799 | ||
5800 | /* Support for expanding the reloc array that is stored | |
5801 | in the section structure. If the relocations have been | |
5802 | reallocated, the newly allocated relocations will be referenced | |
5803 | here along with the actual size allocated. The relocation | |
5804 | count will always be found in the section structure. */ | |
5805 | Elf_Internal_Rela *allocated_relocs; | |
5806 | unsigned relocs_count; | |
5807 | unsigned allocated_relocs_count; | |
5808 | }; | |
5809 | ||
5810 | struct elf_xtensa_section_data | |
5811 | { | |
5812 | struct bfd_elf_section_data elf; | |
5813 | xtensa_relax_info relax_info; | |
5814 | }; | |
5815 | ||
43cd72b9 BW |
5816 | |
5817 | static bfd_boolean | |
7fa3d080 | 5818 | elf_xtensa_new_section_hook (bfd *abfd, asection *sec) |
43cd72b9 | 5819 | { |
f592407e AM |
5820 | if (!sec->used_by_bfd) |
5821 | { | |
5822 | struct elf_xtensa_section_data *sdata; | |
5823 | bfd_size_type amt = sizeof (*sdata); | |
43cd72b9 | 5824 | |
f592407e AM |
5825 | sdata = bfd_zalloc (abfd, amt); |
5826 | if (sdata == NULL) | |
5827 | return FALSE; | |
5828 | sec->used_by_bfd = sdata; | |
5829 | } | |
43cd72b9 BW |
5830 | |
5831 | return _bfd_elf_new_section_hook (abfd, sec); | |
5832 | } | |
5833 | ||
5834 | ||
7fa3d080 BW |
5835 | static xtensa_relax_info * |
5836 | get_xtensa_relax_info (asection *sec) | |
5837 | { | |
5838 | struct elf_xtensa_section_data *section_data; | |
5839 | ||
5840 | /* No info available if no section or if it is an output section. */ | |
5841 | if (!sec || sec == sec->output_section) | |
5842 | return NULL; | |
5843 | ||
5844 | section_data = (struct elf_xtensa_section_data *) elf_section_data (sec); | |
5845 | return §ion_data->relax_info; | |
5846 | } | |
5847 | ||
5848 | ||
43cd72b9 | 5849 | static void |
7fa3d080 | 5850 | init_xtensa_relax_info (asection *sec) |
43cd72b9 BW |
5851 | { |
5852 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5853 | ||
5854 | relax_info->is_relaxable_literal_section = FALSE; | |
5855 | relax_info->is_relaxable_asm_section = FALSE; | |
5856 | relax_info->visited = 0; | |
5857 | ||
5858 | relax_info->src_relocs = NULL; | |
5859 | relax_info->src_count = 0; | |
5860 | relax_info->src_next = 0; | |
5861 | ||
5862 | relax_info->removed_list.head = NULL; | |
5863 | relax_info->removed_list.tail = NULL; | |
5864 | ||
5865 | relax_info->action_list.head = NULL; | |
5866 | ||
5867 | relax_info->fix_list = NULL; | |
5868 | relax_info->fix_array = NULL; | |
5869 | relax_info->fix_array_count = 0; | |
5870 | ||
5871 | relax_info->allocated_relocs = NULL; | |
5872 | relax_info->relocs_count = 0; | |
5873 | relax_info->allocated_relocs_count = 0; | |
5874 | } | |
5875 | ||
43cd72b9 BW |
5876 | \f |
5877 | /* Coalescing literals may require a relocation to refer to a section in | |
5878 | a different input file, but the standard relocation information | |
5879 | cannot express that. Instead, the reloc_bfd_fix structures are used | |
5880 | to "fix" the relocations that refer to sections in other input files. | |
5881 | These structures are kept on per-section lists. The "src_type" field | |
5882 | records the relocation type in case there are multiple relocations on | |
5883 | the same location. FIXME: This is ugly; an alternative might be to | |
5884 | add new symbols with the "owner" field to some other input file. */ | |
5885 | ||
5886 | struct reloc_bfd_fix_struct | |
5887 | { | |
5888 | asection *src_sec; | |
5889 | bfd_vma src_offset; | |
5890 | unsigned src_type; /* Relocation type. */ | |
5891 | ||
43cd72b9 BW |
5892 | asection *target_sec; |
5893 | bfd_vma target_offset; | |
5894 | bfd_boolean translated; | |
5895 | ||
5896 | reloc_bfd_fix *next; | |
5897 | }; | |
5898 | ||
5899 | ||
43cd72b9 | 5900 | static reloc_bfd_fix * |
7fa3d080 BW |
5901 | reloc_bfd_fix_init (asection *src_sec, |
5902 | bfd_vma src_offset, | |
5903 | unsigned src_type, | |
7fa3d080 BW |
5904 | asection *target_sec, |
5905 | bfd_vma target_offset, | |
5906 | bfd_boolean translated) | |
43cd72b9 BW |
5907 | { |
5908 | reloc_bfd_fix *fix; | |
5909 | ||
5910 | fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix)); | |
5911 | fix->src_sec = src_sec; | |
5912 | fix->src_offset = src_offset; | |
5913 | fix->src_type = src_type; | |
43cd72b9 BW |
5914 | fix->target_sec = target_sec; |
5915 | fix->target_offset = target_offset; | |
5916 | fix->translated = translated; | |
5917 | ||
5918 | return fix; | |
5919 | } | |
5920 | ||
5921 | ||
5922 | static void | |
7fa3d080 | 5923 | add_fix (asection *src_sec, reloc_bfd_fix *fix) |
43cd72b9 BW |
5924 | { |
5925 | xtensa_relax_info *relax_info; | |
5926 | ||
5927 | relax_info = get_xtensa_relax_info (src_sec); | |
5928 | fix->next = relax_info->fix_list; | |
5929 | relax_info->fix_list = fix; | |
5930 | } | |
5931 | ||
5932 | ||
5933 | static int | |
7fa3d080 | 5934 | fix_compare (const void *ap, const void *bp) |
43cd72b9 BW |
5935 | { |
5936 | const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap; | |
5937 | const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp; | |
5938 | ||
5939 | if (a->src_offset != b->src_offset) | |
5940 | return (a->src_offset - b->src_offset); | |
5941 | return (a->src_type - b->src_type); | |
5942 | } | |
5943 | ||
5944 | ||
5945 | static void | |
7fa3d080 | 5946 | cache_fix_array (asection *sec) |
43cd72b9 BW |
5947 | { |
5948 | unsigned i, count = 0; | |
5949 | reloc_bfd_fix *r; | |
5950 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5951 | ||
5952 | if (relax_info == NULL) | |
5953 | return; | |
5954 | if (relax_info->fix_list == NULL) | |
5955 | return; | |
5956 | ||
5957 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
5958 | count++; | |
5959 | ||
5960 | relax_info->fix_array = | |
5961 | (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count); | |
5962 | relax_info->fix_array_count = count; | |
5963 | ||
5964 | r = relax_info->fix_list; | |
5965 | for (i = 0; i < count; i++, r = r->next) | |
5966 | { | |
5967 | relax_info->fix_array[count - 1 - i] = *r; | |
5968 | relax_info->fix_array[count - 1 - i].next = NULL; | |
5969 | } | |
5970 | ||
5971 | qsort (relax_info->fix_array, relax_info->fix_array_count, | |
5972 | sizeof (reloc_bfd_fix), fix_compare); | |
5973 | } | |
5974 | ||
5975 | ||
5976 | static reloc_bfd_fix * | |
7fa3d080 | 5977 | get_bfd_fix (asection *sec, bfd_vma offset, unsigned type) |
43cd72b9 BW |
5978 | { |
5979 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5980 | reloc_bfd_fix *rv; | |
5981 | reloc_bfd_fix key; | |
5982 | ||
5983 | if (relax_info == NULL) | |
5984 | return NULL; | |
5985 | if (relax_info->fix_list == NULL) | |
5986 | return NULL; | |
5987 | ||
5988 | if (relax_info->fix_array == NULL) | |
5989 | cache_fix_array (sec); | |
5990 | ||
5991 | key.src_offset = offset; | |
5992 | key.src_type = type; | |
5993 | rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count, | |
5994 | sizeof (reloc_bfd_fix), fix_compare); | |
5995 | return rv; | |
5996 | } | |
5997 | ||
5998 | \f | |
5999 | /* Section caching. */ | |
6000 | ||
6001 | typedef struct section_cache_struct section_cache_t; | |
6002 | ||
6003 | struct section_cache_struct | |
6004 | { | |
6005 | asection *sec; | |
6006 | ||
6007 | bfd_byte *contents; /* Cache of the section contents. */ | |
6008 | bfd_size_type content_length; | |
6009 | ||
6010 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6011 | unsigned pte_count; | |
6012 | ||
6013 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6014 | unsigned reloc_count; | |
6015 | }; | |
6016 | ||
6017 | ||
7fa3d080 BW |
6018 | static void |
6019 | init_section_cache (section_cache_t *sec_cache) | |
6020 | { | |
6021 | memset (sec_cache, 0, sizeof (*sec_cache)); | |
6022 | } | |
43cd72b9 BW |
6023 | |
6024 | ||
6025 | static void | |
7fa3d080 | 6026 | clear_section_cache (section_cache_t *sec_cache) |
43cd72b9 | 6027 | { |
7fa3d080 BW |
6028 | if (sec_cache->sec) |
6029 | { | |
6030 | release_contents (sec_cache->sec, sec_cache->contents); | |
6031 | release_internal_relocs (sec_cache->sec, sec_cache->relocs); | |
6032 | if (sec_cache->ptbl) | |
6033 | free (sec_cache->ptbl); | |
6034 | memset (sec_cache, 0, sizeof (sec_cache)); | |
6035 | } | |
43cd72b9 BW |
6036 | } |
6037 | ||
6038 | ||
6039 | static bfd_boolean | |
7fa3d080 BW |
6040 | section_cache_section (section_cache_t *sec_cache, |
6041 | asection *sec, | |
6042 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6043 | { |
6044 | bfd *abfd; | |
6045 | property_table_entry *prop_table = NULL; | |
6046 | int ptblsize = 0; | |
6047 | bfd_byte *contents = NULL; | |
6048 | Elf_Internal_Rela *internal_relocs = NULL; | |
6049 | bfd_size_type sec_size; | |
6050 | ||
6051 | if (sec == NULL) | |
6052 | return FALSE; | |
6053 | if (sec == sec_cache->sec) | |
6054 | return TRUE; | |
6055 | ||
6056 | abfd = sec->owner; | |
6057 | sec_size = bfd_get_section_limit (abfd, sec); | |
6058 | ||
6059 | /* Get the contents. */ | |
6060 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6061 | if (contents == NULL && sec_size != 0) | |
6062 | goto err; | |
6063 | ||
6064 | /* Get the relocations. */ | |
6065 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6066 | link_info->keep_memory); | |
6067 | ||
6068 | /* Get the entry table. */ | |
6069 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, | |
6070 | XTENSA_PROP_SEC_NAME, FALSE); | |
6071 | if (ptblsize < 0) | |
6072 | goto err; | |
6073 | ||
6074 | /* Fill in the new section cache. */ | |
6075 | clear_section_cache (sec_cache); | |
6076 | memset (sec_cache, 0, sizeof (sec_cache)); | |
6077 | ||
6078 | sec_cache->sec = sec; | |
6079 | sec_cache->contents = contents; | |
6080 | sec_cache->content_length = sec_size; | |
6081 | sec_cache->relocs = internal_relocs; | |
6082 | sec_cache->reloc_count = sec->reloc_count; | |
6083 | sec_cache->pte_count = ptblsize; | |
6084 | sec_cache->ptbl = prop_table; | |
6085 | ||
6086 | return TRUE; | |
6087 | ||
6088 | err: | |
6089 | release_contents (sec, contents); | |
6090 | release_internal_relocs (sec, internal_relocs); | |
6091 | if (prop_table) | |
6092 | free (prop_table); | |
6093 | return FALSE; | |
6094 | } | |
6095 | ||
43cd72b9 BW |
6096 | \f |
6097 | /* Extended basic blocks. */ | |
6098 | ||
6099 | /* An ebb_struct represents an Extended Basic Block. Within this | |
6100 | range, we guarantee that all instructions are decodable, the | |
6101 | property table entries are contiguous, and no property table | |
6102 | specifies a segment that cannot have instructions moved. This | |
6103 | structure contains caches of the contents, property table and | |
6104 | relocations for the specified section for easy use. The range is | |
6105 | specified by ranges of indices for the byte offset, property table | |
6106 | offsets and relocation offsets. These must be consistent. */ | |
6107 | ||
6108 | typedef struct ebb_struct ebb_t; | |
6109 | ||
6110 | struct ebb_struct | |
6111 | { | |
6112 | asection *sec; | |
6113 | ||
6114 | bfd_byte *contents; /* Cache of the section contents. */ | |
6115 | bfd_size_type content_length; | |
6116 | ||
6117 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6118 | unsigned pte_count; | |
6119 | ||
6120 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6121 | unsigned reloc_count; | |
6122 | ||
6123 | bfd_vma start_offset; /* Offset in section. */ | |
6124 | unsigned start_ptbl_idx; /* Offset in the property table. */ | |
6125 | unsigned start_reloc_idx; /* Offset in the relocations. */ | |
6126 | ||
6127 | bfd_vma end_offset; | |
6128 | unsigned end_ptbl_idx; | |
6129 | unsigned end_reloc_idx; | |
6130 | ||
6131 | bfd_boolean ends_section; /* Is this the last ebb in a section? */ | |
6132 | ||
6133 | /* The unreachable property table at the end of this set of blocks; | |
6134 | NULL if the end is not an unreachable block. */ | |
6135 | property_table_entry *ends_unreachable; | |
6136 | }; | |
6137 | ||
6138 | ||
6139 | enum ebb_target_enum | |
6140 | { | |
6141 | EBB_NO_ALIGN = 0, | |
6142 | EBB_DESIRE_TGT_ALIGN, | |
6143 | EBB_REQUIRE_TGT_ALIGN, | |
6144 | EBB_REQUIRE_LOOP_ALIGN, | |
6145 | EBB_REQUIRE_ALIGN | |
6146 | }; | |
6147 | ||
6148 | ||
6149 | /* proposed_action_struct is similar to the text_action_struct except | |
6150 | that is represents a potential transformation, not one that will | |
6151 | occur. We build a list of these for an extended basic block | |
6152 | and use them to compute the actual actions desired. We must be | |
6153 | careful that the entire set of actual actions we perform do not | |
6154 | break any relocations that would fit if the actions were not | |
6155 | performed. */ | |
6156 | ||
6157 | typedef struct proposed_action_struct proposed_action; | |
6158 | ||
6159 | struct proposed_action_struct | |
6160 | { | |
6161 | enum ebb_target_enum align_type; /* for the target alignment */ | |
6162 | bfd_vma alignment_pow; | |
6163 | text_action_t action; | |
6164 | bfd_vma offset; | |
6165 | int removed_bytes; | |
6166 | bfd_boolean do_action; /* If false, then we will not perform the action. */ | |
6167 | }; | |
6168 | ||
6169 | ||
6170 | /* The ebb_constraint_struct keeps a set of proposed actions for an | |
6171 | extended basic block. */ | |
6172 | ||
6173 | typedef struct ebb_constraint_struct ebb_constraint; | |
6174 | ||
6175 | struct ebb_constraint_struct | |
6176 | { | |
6177 | ebb_t ebb; | |
6178 | bfd_boolean start_movable; | |
6179 | ||
6180 | /* Bytes of extra space at the beginning if movable. */ | |
6181 | int start_extra_space; | |
6182 | ||
6183 | enum ebb_target_enum start_align; | |
6184 | ||
6185 | bfd_boolean end_movable; | |
6186 | ||
6187 | /* Bytes of extra space at the end if movable. */ | |
6188 | int end_extra_space; | |
6189 | ||
6190 | unsigned action_count; | |
6191 | unsigned action_allocated; | |
6192 | ||
6193 | /* Array of proposed actions. */ | |
6194 | proposed_action *actions; | |
6195 | ||
6196 | /* Action alignments -- one for each proposed action. */ | |
6197 | enum ebb_target_enum *action_aligns; | |
6198 | }; | |
6199 | ||
6200 | ||
43cd72b9 | 6201 | static void |
7fa3d080 | 6202 | init_ebb_constraint (ebb_constraint *c) |
43cd72b9 BW |
6203 | { |
6204 | memset (c, 0, sizeof (ebb_constraint)); | |
6205 | } | |
6206 | ||
6207 | ||
6208 | static void | |
7fa3d080 | 6209 | free_ebb_constraint (ebb_constraint *c) |
43cd72b9 | 6210 | { |
7fa3d080 | 6211 | if (c->actions) |
43cd72b9 BW |
6212 | free (c->actions); |
6213 | } | |
6214 | ||
6215 | ||
6216 | static void | |
7fa3d080 BW |
6217 | init_ebb (ebb_t *ebb, |
6218 | asection *sec, | |
6219 | bfd_byte *contents, | |
6220 | bfd_size_type content_length, | |
6221 | property_table_entry *prop_table, | |
6222 | unsigned ptblsize, | |
6223 | Elf_Internal_Rela *internal_relocs, | |
6224 | unsigned reloc_count) | |
43cd72b9 BW |
6225 | { |
6226 | memset (ebb, 0, sizeof (ebb_t)); | |
6227 | ebb->sec = sec; | |
6228 | ebb->contents = contents; | |
6229 | ebb->content_length = content_length; | |
6230 | ebb->ptbl = prop_table; | |
6231 | ebb->pte_count = ptblsize; | |
6232 | ebb->relocs = internal_relocs; | |
6233 | ebb->reloc_count = reloc_count; | |
6234 | ebb->start_offset = 0; | |
6235 | ebb->end_offset = ebb->content_length - 1; | |
6236 | ebb->start_ptbl_idx = 0; | |
6237 | ebb->end_ptbl_idx = ptblsize; | |
6238 | ebb->start_reloc_idx = 0; | |
6239 | ebb->end_reloc_idx = reloc_count; | |
6240 | } | |
6241 | ||
6242 | ||
6243 | /* Extend the ebb to all decodable contiguous sections. The algorithm | |
6244 | for building a basic block around an instruction is to push it | |
6245 | forward until we hit the end of a section, an unreachable block or | |
6246 | a block that cannot be transformed. Then we push it backwards | |
6247 | searching for similar conditions. */ | |
6248 | ||
7fa3d080 BW |
6249 | static bfd_boolean extend_ebb_bounds_forward (ebb_t *); |
6250 | static bfd_boolean extend_ebb_bounds_backward (ebb_t *); | |
6251 | static bfd_size_type insn_block_decodable_len | |
6252 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type); | |
6253 | ||
43cd72b9 | 6254 | static bfd_boolean |
7fa3d080 | 6255 | extend_ebb_bounds (ebb_t *ebb) |
43cd72b9 BW |
6256 | { |
6257 | if (!extend_ebb_bounds_forward (ebb)) | |
6258 | return FALSE; | |
6259 | if (!extend_ebb_bounds_backward (ebb)) | |
6260 | return FALSE; | |
6261 | return TRUE; | |
6262 | } | |
6263 | ||
6264 | ||
6265 | static bfd_boolean | |
7fa3d080 | 6266 | extend_ebb_bounds_forward (ebb_t *ebb) |
43cd72b9 BW |
6267 | { |
6268 | property_table_entry *the_entry, *new_entry; | |
6269 | ||
6270 | the_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
6271 | ||
6272 | /* Stop when (1) we cannot decode an instruction, (2) we are at | |
6273 | the end of the property tables, (3) we hit a non-contiguous property | |
6274 | table entry, (4) we hit a NO_TRANSFORM region. */ | |
6275 | ||
6276 | while (1) | |
6277 | { | |
6278 | bfd_vma entry_end; | |
6279 | bfd_size_type insn_block_len; | |
6280 | ||
6281 | entry_end = the_entry->address - ebb->sec->vma + the_entry->size; | |
6282 | insn_block_len = | |
6283 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6284 | ebb->end_offset, | |
6285 | entry_end - ebb->end_offset); | |
6286 | if (insn_block_len != (entry_end - ebb->end_offset)) | |
6287 | { | |
6288 | (*_bfd_error_handler) | |
6289 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6290 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
6291 | return FALSE; | |
6292 | } | |
6293 | ebb->end_offset += insn_block_len; | |
6294 | ||
6295 | if (ebb->end_offset == ebb->sec->size) | |
6296 | ebb->ends_section = TRUE; | |
6297 | ||
6298 | /* Update the reloc counter. */ | |
6299 | while (ebb->end_reloc_idx + 1 < ebb->reloc_count | |
6300 | && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset | |
6301 | < ebb->end_offset)) | |
6302 | { | |
6303 | ebb->end_reloc_idx++; | |
6304 | } | |
6305 | ||
6306 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6307 | return TRUE; | |
6308 | ||
6309 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6310 | if (((new_entry->flags & XTENSA_PROP_INSN) == 0) | |
99ded152 | 6311 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6312 | || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6313 | break; | |
6314 | ||
6315 | if (the_entry->address + the_entry->size != new_entry->address) | |
6316 | break; | |
6317 | ||
6318 | the_entry = new_entry; | |
6319 | ebb->end_ptbl_idx++; | |
6320 | } | |
6321 | ||
6322 | /* Quick check for an unreachable or end of file just at the end. */ | |
6323 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6324 | { | |
6325 | if (ebb->end_offset == ebb->content_length) | |
6326 | ebb->ends_section = TRUE; | |
6327 | } | |
6328 | else | |
6329 | { | |
6330 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6331 | if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0 | |
6332 | && the_entry->address + the_entry->size == new_entry->address) | |
6333 | ebb->ends_unreachable = new_entry; | |
6334 | } | |
6335 | ||
6336 | /* Any other ending requires exact alignment. */ | |
6337 | return TRUE; | |
6338 | } | |
6339 | ||
6340 | ||
6341 | static bfd_boolean | |
7fa3d080 | 6342 | extend_ebb_bounds_backward (ebb_t *ebb) |
43cd72b9 BW |
6343 | { |
6344 | property_table_entry *the_entry, *new_entry; | |
6345 | ||
6346 | the_entry = &ebb->ptbl[ebb->start_ptbl_idx]; | |
6347 | ||
6348 | /* Stop when (1) we cannot decode the instructions in the current entry. | |
6349 | (2) we are at the beginning of the property tables, (3) we hit a | |
6350 | non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */ | |
6351 | ||
6352 | while (1) | |
6353 | { | |
6354 | bfd_vma block_begin; | |
6355 | bfd_size_type insn_block_len; | |
6356 | ||
6357 | block_begin = the_entry->address - ebb->sec->vma; | |
6358 | insn_block_len = | |
6359 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6360 | block_begin, | |
6361 | ebb->start_offset - block_begin); | |
6362 | if (insn_block_len != ebb->start_offset - block_begin) | |
6363 | { | |
6364 | (*_bfd_error_handler) | |
6365 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6366 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
6367 | return FALSE; | |
6368 | } | |
6369 | ebb->start_offset -= insn_block_len; | |
6370 | ||
6371 | /* Update the reloc counter. */ | |
6372 | while (ebb->start_reloc_idx > 0 | |
6373 | && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset | |
6374 | >= ebb->start_offset)) | |
6375 | { | |
6376 | ebb->start_reloc_idx--; | |
6377 | } | |
6378 | ||
6379 | if (ebb->start_ptbl_idx == 0) | |
6380 | return TRUE; | |
6381 | ||
6382 | new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1]; | |
6383 | if ((new_entry->flags & XTENSA_PROP_INSN) == 0 | |
99ded152 | 6384 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6385 | || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6386 | return TRUE; | |
6387 | if (new_entry->address + new_entry->size != the_entry->address) | |
6388 | return TRUE; | |
6389 | ||
6390 | the_entry = new_entry; | |
6391 | ebb->start_ptbl_idx--; | |
6392 | } | |
6393 | return TRUE; | |
6394 | } | |
6395 | ||
6396 | ||
6397 | static bfd_size_type | |
7fa3d080 BW |
6398 | insn_block_decodable_len (bfd_byte *contents, |
6399 | bfd_size_type content_len, | |
6400 | bfd_vma block_offset, | |
6401 | bfd_size_type block_len) | |
43cd72b9 BW |
6402 | { |
6403 | bfd_vma offset = block_offset; | |
6404 | ||
6405 | while (offset < block_offset + block_len) | |
6406 | { | |
6407 | bfd_size_type insn_len = 0; | |
6408 | ||
6409 | insn_len = insn_decode_len (contents, content_len, offset); | |
6410 | if (insn_len == 0) | |
6411 | return (offset - block_offset); | |
6412 | offset += insn_len; | |
6413 | } | |
6414 | return (offset - block_offset); | |
6415 | } | |
6416 | ||
6417 | ||
6418 | static void | |
7fa3d080 | 6419 | ebb_propose_action (ebb_constraint *c, |
7fa3d080 | 6420 | enum ebb_target_enum align_type, |
288f74fa | 6421 | bfd_vma alignment_pow, |
7fa3d080 BW |
6422 | text_action_t action, |
6423 | bfd_vma offset, | |
6424 | int removed_bytes, | |
6425 | bfd_boolean do_action) | |
43cd72b9 | 6426 | { |
b08b5071 | 6427 | proposed_action *act; |
43cd72b9 | 6428 | |
43cd72b9 BW |
6429 | if (c->action_allocated <= c->action_count) |
6430 | { | |
b08b5071 | 6431 | unsigned new_allocated, i; |
823fc61f | 6432 | proposed_action *new_actions; |
b08b5071 BW |
6433 | |
6434 | new_allocated = (c->action_count + 2) * 2; | |
823fc61f | 6435 | new_actions = (proposed_action *) |
43cd72b9 BW |
6436 | bfd_zmalloc (sizeof (proposed_action) * new_allocated); |
6437 | ||
6438 | for (i = 0; i < c->action_count; i++) | |
6439 | new_actions[i] = c->actions[i]; | |
7fa3d080 | 6440 | if (c->actions) |
43cd72b9 BW |
6441 | free (c->actions); |
6442 | c->actions = new_actions; | |
6443 | c->action_allocated = new_allocated; | |
6444 | } | |
b08b5071 BW |
6445 | |
6446 | act = &c->actions[c->action_count]; | |
6447 | act->align_type = align_type; | |
6448 | act->alignment_pow = alignment_pow; | |
6449 | act->action = action; | |
6450 | act->offset = offset; | |
6451 | act->removed_bytes = removed_bytes; | |
6452 | act->do_action = do_action; | |
6453 | ||
43cd72b9 BW |
6454 | c->action_count++; |
6455 | } | |
6456 | ||
6457 | \f | |
6458 | /* Access to internal relocations, section contents and symbols. */ | |
6459 | ||
6460 | /* During relaxation, we need to modify relocations, section contents, | |
6461 | and symbol definitions, and we need to keep the original values from | |
6462 | being reloaded from the input files, i.e., we need to "pin" the | |
6463 | modified values in memory. We also want to continue to observe the | |
6464 | setting of the "keep-memory" flag. The following functions wrap the | |
6465 | standard BFD functions to take care of this for us. */ | |
6466 | ||
6467 | static Elf_Internal_Rela * | |
7fa3d080 | 6468 | retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6469 | { |
6470 | Elf_Internal_Rela *internal_relocs; | |
6471 | ||
6472 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6473 | return NULL; | |
6474 | ||
6475 | internal_relocs = elf_section_data (sec)->relocs; | |
6476 | if (internal_relocs == NULL) | |
6477 | internal_relocs = (_bfd_elf_link_read_relocs | |
7fa3d080 | 6478 | (abfd, sec, NULL, NULL, keep_memory)); |
43cd72b9 BW |
6479 | return internal_relocs; |
6480 | } | |
6481 | ||
6482 | ||
6483 | static void | |
7fa3d080 | 6484 | pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6485 | { |
6486 | elf_section_data (sec)->relocs = internal_relocs; | |
6487 | } | |
6488 | ||
6489 | ||
6490 | static void | |
7fa3d080 | 6491 | release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6492 | { |
6493 | if (internal_relocs | |
6494 | && elf_section_data (sec)->relocs != internal_relocs) | |
6495 | free (internal_relocs); | |
6496 | } | |
6497 | ||
6498 | ||
6499 | static bfd_byte * | |
7fa3d080 | 6500 | retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6501 | { |
6502 | bfd_byte *contents; | |
6503 | bfd_size_type sec_size; | |
6504 | ||
6505 | sec_size = bfd_get_section_limit (abfd, sec); | |
6506 | contents = elf_section_data (sec)->this_hdr.contents; | |
6507 | ||
6508 | if (contents == NULL && sec_size != 0) | |
6509 | { | |
6510 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
6511 | { | |
7fa3d080 | 6512 | if (contents) |
43cd72b9 BW |
6513 | free (contents); |
6514 | return NULL; | |
6515 | } | |
6516 | if (keep_memory) | |
6517 | elf_section_data (sec)->this_hdr.contents = contents; | |
6518 | } | |
6519 | return contents; | |
6520 | } | |
6521 | ||
6522 | ||
6523 | static void | |
7fa3d080 | 6524 | pin_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6525 | { |
6526 | elf_section_data (sec)->this_hdr.contents = contents; | |
6527 | } | |
6528 | ||
6529 | ||
6530 | static void | |
7fa3d080 | 6531 | release_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6532 | { |
6533 | if (contents && elf_section_data (sec)->this_hdr.contents != contents) | |
6534 | free (contents); | |
6535 | } | |
6536 | ||
6537 | ||
6538 | static Elf_Internal_Sym * | |
7fa3d080 | 6539 | retrieve_local_syms (bfd *input_bfd) |
43cd72b9 BW |
6540 | { |
6541 | Elf_Internal_Shdr *symtab_hdr; | |
6542 | Elf_Internal_Sym *isymbuf; | |
6543 | size_t locsymcount; | |
6544 | ||
6545 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
6546 | locsymcount = symtab_hdr->sh_info; | |
6547 | ||
6548 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
6549 | if (isymbuf == NULL && locsymcount != 0) | |
6550 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6551 | NULL, NULL, NULL); | |
6552 | ||
6553 | /* Save the symbols for this input file so they won't be read again. */ | |
6554 | if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents) | |
6555 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
6556 | ||
6557 | return isymbuf; | |
6558 | } | |
6559 | ||
6560 | \f | |
6561 | /* Code for link-time relaxation. */ | |
6562 | ||
6563 | /* Initialization for relaxation: */ | |
7fa3d080 | 6564 | static bfd_boolean analyze_relocations (struct bfd_link_info *); |
43cd72b9 | 6565 | static bfd_boolean find_relaxable_sections |
7fa3d080 | 6566 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
43cd72b9 | 6567 | static bfd_boolean collect_source_relocs |
7fa3d080 | 6568 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 | 6569 | static bfd_boolean is_resolvable_asm_expansion |
7fa3d080 BW |
6570 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *, |
6571 | bfd_boolean *); | |
43cd72b9 | 6572 | static Elf_Internal_Rela *find_associated_l32r_irel |
7fa3d080 | 6573 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *); |
43cd72b9 | 6574 | static bfd_boolean compute_text_actions |
7fa3d080 BW |
6575 | (bfd *, asection *, struct bfd_link_info *); |
6576 | static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *); | |
6577 | static bfd_boolean compute_ebb_actions (ebb_constraint *); | |
43cd72b9 | 6578 | static bfd_boolean check_section_ebb_pcrels_fit |
cb337148 BW |
6579 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, const ebb_constraint *, |
6580 | const xtensa_opcode *); | |
7fa3d080 | 6581 | static bfd_boolean check_section_ebb_reduces (const ebb_constraint *); |
43cd72b9 | 6582 | static void text_action_add_proposed |
7fa3d080 BW |
6583 | (text_action_list *, const ebb_constraint *, asection *); |
6584 | static int compute_fill_extra_space (property_table_entry *); | |
43cd72b9 BW |
6585 | |
6586 | /* First pass: */ | |
6587 | static bfd_boolean compute_removed_literals | |
7fa3d080 | 6588 | (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *); |
43cd72b9 | 6589 | static Elf_Internal_Rela *get_irel_at_offset |
7fa3d080 | 6590 | (asection *, Elf_Internal_Rela *, bfd_vma); |
43cd72b9 | 6591 | static bfd_boolean is_removable_literal |
99ded152 BW |
6592 | (const source_reloc *, int, const source_reloc *, int, asection *, |
6593 | property_table_entry *, int); | |
43cd72b9 | 6594 | static bfd_boolean remove_dead_literal |
7fa3d080 BW |
6595 | (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
6596 | Elf_Internal_Rela *, source_reloc *, property_table_entry *, int); | |
6597 | static bfd_boolean identify_literal_placement | |
6598 | (bfd *, asection *, bfd_byte *, struct bfd_link_info *, | |
6599 | value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int, | |
6600 | source_reloc *, property_table_entry *, int, section_cache_t *, | |
6601 | bfd_boolean); | |
6602 | static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *); | |
43cd72b9 | 6603 | static bfd_boolean coalesce_shared_literal |
7fa3d080 | 6604 | (asection *, source_reloc *, property_table_entry *, int, value_map *); |
43cd72b9 | 6605 | static bfd_boolean move_shared_literal |
7fa3d080 BW |
6606 | (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *, |
6607 | int, const r_reloc *, const literal_value *, section_cache_t *); | |
43cd72b9 BW |
6608 | |
6609 | /* Second pass: */ | |
7fa3d080 BW |
6610 | static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *); |
6611 | static bfd_boolean translate_section_fixes (asection *); | |
6612 | static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *); | |
9b7f5d20 | 6613 | static asection *translate_reloc (const r_reloc *, r_reloc *, asection *); |
43cd72b9 | 6614 | static void shrink_dynamic_reloc_sections |
7fa3d080 | 6615 | (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *); |
43cd72b9 | 6616 | static bfd_boolean move_literal |
7fa3d080 BW |
6617 | (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *, |
6618 | xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *); | |
43cd72b9 | 6619 | static bfd_boolean relax_property_section |
7fa3d080 | 6620 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 BW |
6621 | |
6622 | /* Third pass: */ | |
7fa3d080 | 6623 | static bfd_boolean relax_section_symbols (bfd *, asection *); |
43cd72b9 BW |
6624 | |
6625 | ||
6626 | static bfd_boolean | |
7fa3d080 BW |
6627 | elf_xtensa_relax_section (bfd *abfd, |
6628 | asection *sec, | |
6629 | struct bfd_link_info *link_info, | |
6630 | bfd_boolean *again) | |
43cd72b9 BW |
6631 | { |
6632 | static value_map_hash_table *values = NULL; | |
6633 | static bfd_boolean relocations_analyzed = FALSE; | |
6634 | xtensa_relax_info *relax_info; | |
6635 | ||
6636 | if (!relocations_analyzed) | |
6637 | { | |
6638 | /* Do some overall initialization for relaxation. */ | |
6639 | values = value_map_hash_table_init (); | |
6640 | if (values == NULL) | |
6641 | return FALSE; | |
6642 | relaxing_section = TRUE; | |
6643 | if (!analyze_relocations (link_info)) | |
6644 | return FALSE; | |
6645 | relocations_analyzed = TRUE; | |
6646 | } | |
6647 | *again = FALSE; | |
6648 | ||
6649 | /* Don't mess with linker-created sections. */ | |
6650 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6651 | return TRUE; | |
6652 | ||
6653 | relax_info = get_xtensa_relax_info (sec); | |
6654 | BFD_ASSERT (relax_info != NULL); | |
6655 | ||
6656 | switch (relax_info->visited) | |
6657 | { | |
6658 | case 0: | |
6659 | /* Note: It would be nice to fold this pass into | |
6660 | analyze_relocations, but it is important for this step that the | |
6661 | sections be examined in link order. */ | |
6662 | if (!compute_removed_literals (abfd, sec, link_info, values)) | |
6663 | return FALSE; | |
6664 | *again = TRUE; | |
6665 | break; | |
6666 | ||
6667 | case 1: | |
6668 | if (values) | |
6669 | value_map_hash_table_delete (values); | |
6670 | values = NULL; | |
6671 | if (!relax_section (abfd, sec, link_info)) | |
6672 | return FALSE; | |
6673 | *again = TRUE; | |
6674 | break; | |
6675 | ||
6676 | case 2: | |
6677 | if (!relax_section_symbols (abfd, sec)) | |
6678 | return FALSE; | |
6679 | break; | |
6680 | } | |
6681 | ||
6682 | relax_info->visited++; | |
6683 | return TRUE; | |
6684 | } | |
6685 | ||
6686 | \f | |
6687 | /* Initialization for relaxation. */ | |
6688 | ||
6689 | /* This function is called once at the start of relaxation. It scans | |
6690 | all the input sections and marks the ones that are relaxable (i.e., | |
6691 | literal sections with L32R relocations against them), and then | |
6692 | collects source_reloc information for all the relocations against | |
6693 | those relaxable sections. During this process, it also detects | |
6694 | longcalls, i.e., calls relaxed by the assembler into indirect | |
6695 | calls, that can be optimized back into direct calls. Within each | |
6696 | extended basic block (ebb) containing an optimized longcall, it | |
6697 | computes a set of "text actions" that can be performed to remove | |
6698 | the L32R associated with the longcall while optionally preserving | |
6699 | branch target alignments. */ | |
6700 | ||
6701 | static bfd_boolean | |
7fa3d080 | 6702 | analyze_relocations (struct bfd_link_info *link_info) |
43cd72b9 BW |
6703 | { |
6704 | bfd *abfd; | |
6705 | asection *sec; | |
6706 | bfd_boolean is_relaxable = FALSE; | |
6707 | ||
6708 | /* Initialize the per-section relaxation info. */ | |
6709 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6710 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6711 | { | |
6712 | init_xtensa_relax_info (sec); | |
6713 | } | |
6714 | ||
6715 | /* Mark relaxable sections (and count relocations against each one). */ | |
6716 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6717 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6718 | { | |
6719 | if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable)) | |
6720 | return FALSE; | |
6721 | } | |
6722 | ||
6723 | /* Bail out if there are no relaxable sections. */ | |
6724 | if (!is_relaxable) | |
6725 | return TRUE; | |
6726 | ||
6727 | /* Allocate space for source_relocs. */ | |
6728 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6729 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6730 | { | |
6731 | xtensa_relax_info *relax_info; | |
6732 | ||
6733 | relax_info = get_xtensa_relax_info (sec); | |
6734 | if (relax_info->is_relaxable_literal_section | |
6735 | || relax_info->is_relaxable_asm_section) | |
6736 | { | |
6737 | relax_info->src_relocs = (source_reloc *) | |
6738 | bfd_malloc (relax_info->src_count * sizeof (source_reloc)); | |
6739 | } | |
25c6282a BW |
6740 | else |
6741 | relax_info->src_count = 0; | |
43cd72b9 BW |
6742 | } |
6743 | ||
6744 | /* Collect info on relocations against each relaxable section. */ | |
6745 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
6746 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
6747 | { | |
6748 | if (!collect_source_relocs (abfd, sec, link_info)) | |
6749 | return FALSE; | |
6750 | } | |
6751 | ||
6752 | /* Compute the text actions. */ | |
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 | if (!compute_text_actions (abfd, sec, link_info)) | |
6757 | return FALSE; | |
6758 | } | |
6759 | ||
6760 | return TRUE; | |
6761 | } | |
6762 | ||
6763 | ||
6764 | /* Find all the sections that might be relaxed. The motivation for | |
6765 | this pass is that collect_source_relocs() needs to record _all_ the | |
6766 | relocations that target each relaxable section. That is expensive | |
6767 | and unnecessary unless the target section is actually going to be | |
6768 | relaxed. This pass identifies all such sections by checking if | |
6769 | they have L32Rs pointing to them. In the process, the total number | |
6770 | of relocations targeting each section is also counted so that we | |
6771 | know how much space to allocate for source_relocs against each | |
6772 | relaxable literal section. */ | |
6773 | ||
6774 | static bfd_boolean | |
7fa3d080 BW |
6775 | find_relaxable_sections (bfd *abfd, |
6776 | asection *sec, | |
6777 | struct bfd_link_info *link_info, | |
6778 | bfd_boolean *is_relaxable_p) | |
43cd72b9 BW |
6779 | { |
6780 | Elf_Internal_Rela *internal_relocs; | |
6781 | bfd_byte *contents; | |
6782 | bfd_boolean ok = TRUE; | |
6783 | unsigned i; | |
6784 | xtensa_relax_info *source_relax_info; | |
25c6282a | 6785 | bfd_boolean is_l32r_reloc; |
43cd72b9 BW |
6786 | |
6787 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6788 | link_info->keep_memory); | |
6789 | if (internal_relocs == NULL) | |
6790 | return ok; | |
6791 | ||
6792 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6793 | if (contents == NULL && sec->size != 0) | |
6794 | { | |
6795 | ok = FALSE; | |
6796 | goto error_return; | |
6797 | } | |
6798 | ||
6799 | source_relax_info = get_xtensa_relax_info (sec); | |
6800 | for (i = 0; i < sec->reloc_count; i++) | |
6801 | { | |
6802 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6803 | r_reloc r_rel; | |
6804 | asection *target_sec; | |
6805 | xtensa_relax_info *target_relax_info; | |
6806 | ||
6807 | /* If this section has not already been marked as "relaxable", and | |
6808 | if it contains any ASM_EXPAND relocations (marking expanded | |
6809 | longcalls) that can be optimized into direct calls, then mark | |
6810 | the section as "relaxable". */ | |
6811 | if (source_relax_info | |
6812 | && !source_relax_info->is_relaxable_asm_section | |
6813 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND) | |
6814 | { | |
6815 | bfd_boolean is_reachable = FALSE; | |
6816 | if (is_resolvable_asm_expansion (abfd, sec, contents, irel, | |
6817 | link_info, &is_reachable) | |
6818 | && is_reachable) | |
6819 | { | |
6820 | source_relax_info->is_relaxable_asm_section = TRUE; | |
6821 | *is_relaxable_p = TRUE; | |
6822 | } | |
6823 | } | |
6824 | ||
6825 | r_reloc_init (&r_rel, abfd, irel, contents, | |
6826 | bfd_get_section_limit (abfd, sec)); | |
6827 | ||
6828 | target_sec = r_reloc_get_section (&r_rel); | |
6829 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6830 | if (!target_relax_info) | |
6831 | continue; | |
6832 | ||
6833 | /* Count PC-relative operand relocations against the target section. | |
6834 | Note: The conditions tested here must match the conditions under | |
6835 | which init_source_reloc is called in collect_source_relocs(). */ | |
25c6282a BW |
6836 | is_l32r_reloc = FALSE; |
6837 | if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6838 | { | |
6839 | xtensa_opcode opcode = | |
6840 | get_relocation_opcode (abfd, sec, contents, irel); | |
6841 | if (opcode != XTENSA_UNDEFINED) | |
6842 | { | |
6843 | is_l32r_reloc = (opcode == get_l32r_opcode ()); | |
6844 | if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info)) | |
6845 | || is_l32r_reloc) | |
6846 | target_relax_info->src_count++; | |
6847 | } | |
6848 | } | |
43cd72b9 | 6849 | |
25c6282a | 6850 | if (is_l32r_reloc && r_reloc_is_defined (&r_rel)) |
43cd72b9 BW |
6851 | { |
6852 | /* Mark the target section as relaxable. */ | |
6853 | target_relax_info->is_relaxable_literal_section = TRUE; | |
6854 | *is_relaxable_p = TRUE; | |
6855 | } | |
6856 | } | |
6857 | ||
6858 | error_return: | |
6859 | release_contents (sec, contents); | |
6860 | release_internal_relocs (sec, internal_relocs); | |
6861 | return ok; | |
6862 | } | |
6863 | ||
6864 | ||
6865 | /* Record _all_ the relocations that point to relaxable sections, and | |
6866 | get rid of ASM_EXPAND relocs by either converting them to | |
6867 | ASM_SIMPLIFY or by removing them. */ | |
6868 | ||
6869 | static bfd_boolean | |
7fa3d080 BW |
6870 | collect_source_relocs (bfd *abfd, |
6871 | asection *sec, | |
6872 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6873 | { |
6874 | Elf_Internal_Rela *internal_relocs; | |
6875 | bfd_byte *contents; | |
6876 | bfd_boolean ok = TRUE; | |
6877 | unsigned i; | |
6878 | bfd_size_type sec_size; | |
6879 | ||
6880 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6881 | link_info->keep_memory); | |
6882 | if (internal_relocs == NULL) | |
6883 | return ok; | |
6884 | ||
6885 | sec_size = bfd_get_section_limit (abfd, sec); | |
6886 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6887 | if (contents == NULL && sec_size != 0) | |
6888 | { | |
6889 | ok = FALSE; | |
6890 | goto error_return; | |
6891 | } | |
6892 | ||
6893 | /* Record relocations against relaxable literal sections. */ | |
6894 | for (i = 0; i < sec->reloc_count; i++) | |
6895 | { | |
6896 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6897 | r_reloc r_rel; | |
6898 | asection *target_sec; | |
6899 | xtensa_relax_info *target_relax_info; | |
6900 | ||
6901 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6902 | ||
6903 | target_sec = r_reloc_get_section (&r_rel); | |
6904 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6905 | ||
6906 | if (target_relax_info | |
6907 | && (target_relax_info->is_relaxable_literal_section | |
6908 | || target_relax_info->is_relaxable_asm_section)) | |
6909 | { | |
6910 | xtensa_opcode opcode = XTENSA_UNDEFINED; | |
6911 | int opnd = -1; | |
6912 | bfd_boolean is_abs_literal = FALSE; | |
6913 | ||
6914 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
6915 | { | |
6916 | /* None of the current alternate relocs are PC-relative, | |
6917 | and only PC-relative relocs matter here. However, we | |
6918 | still need to record the opcode for literal | |
6919 | coalescing. */ | |
6920 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6921 | if (opcode == get_l32r_opcode ()) | |
6922 | { | |
6923 | is_abs_literal = TRUE; | |
6924 | opnd = 1; | |
6925 | } | |
6926 | else | |
6927 | opcode = XTENSA_UNDEFINED; | |
6928 | } | |
6929 | else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6930 | { | |
6931 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6932 | opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
6933 | } | |
6934 | ||
6935 | if (opcode != XTENSA_UNDEFINED) | |
6936 | { | |
6937 | int src_next = target_relax_info->src_next++; | |
6938 | source_reloc *s_reloc = &target_relax_info->src_relocs[src_next]; | |
6939 | ||
6940 | init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd, | |
6941 | is_abs_literal); | |
6942 | } | |
6943 | } | |
6944 | } | |
6945 | ||
6946 | /* Now get rid of ASM_EXPAND relocations. At this point, the | |
6947 | src_relocs array for the target literal section may still be | |
6948 | incomplete, but it must at least contain the entries for the L32R | |
6949 | relocations associated with ASM_EXPANDs because they were just | |
6950 | added in the preceding loop over the relocations. */ | |
6951 | ||
6952 | for (i = 0; i < sec->reloc_count; i++) | |
6953 | { | |
6954 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6955 | bfd_boolean is_reachable; | |
6956 | ||
6957 | if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info, | |
6958 | &is_reachable)) | |
6959 | continue; | |
6960 | ||
6961 | if (is_reachable) | |
6962 | { | |
6963 | Elf_Internal_Rela *l32r_irel; | |
6964 | r_reloc r_rel; | |
6965 | asection *target_sec; | |
6966 | xtensa_relax_info *target_relax_info; | |
6967 | ||
6968 | /* Mark the source_reloc for the L32R so that it will be | |
6969 | removed in compute_removed_literals(), along with the | |
6970 | associated literal. */ | |
6971 | l32r_irel = find_associated_l32r_irel (abfd, sec, contents, | |
6972 | irel, internal_relocs); | |
6973 | if (l32r_irel == NULL) | |
6974 | continue; | |
6975 | ||
6976 | r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size); | |
6977 | ||
6978 | target_sec = r_reloc_get_section (&r_rel); | |
6979 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6980 | ||
6981 | if (target_relax_info | |
6982 | && (target_relax_info->is_relaxable_literal_section | |
6983 | || target_relax_info->is_relaxable_asm_section)) | |
6984 | { | |
6985 | source_reloc *s_reloc; | |
6986 | ||
6987 | /* Search the source_relocs for the entry corresponding to | |
6988 | the l32r_irel. Note: The src_relocs array is not yet | |
6989 | sorted, but it wouldn't matter anyway because we're | |
6990 | searching by source offset instead of target offset. */ | |
6991 | s_reloc = find_source_reloc (target_relax_info->src_relocs, | |
6992 | target_relax_info->src_next, | |
6993 | sec, l32r_irel); | |
6994 | BFD_ASSERT (s_reloc); | |
6995 | s_reloc->is_null = TRUE; | |
6996 | } | |
6997 | ||
6998 | /* Convert this reloc to ASM_SIMPLIFY. */ | |
6999 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
7000 | R_XTENSA_ASM_SIMPLIFY); | |
7001 | l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7002 | ||
7003 | pin_internal_relocs (sec, internal_relocs); | |
7004 | } | |
7005 | else | |
7006 | { | |
7007 | /* It is resolvable but doesn't reach. We resolve now | |
7008 | by eliminating the relocation -- the call will remain | |
7009 | expanded into L32R/CALLX. */ | |
7010 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7011 | pin_internal_relocs (sec, internal_relocs); | |
7012 | } | |
7013 | } | |
7014 | ||
7015 | error_return: | |
7016 | release_contents (sec, contents); | |
7017 | release_internal_relocs (sec, internal_relocs); | |
7018 | return ok; | |
7019 | } | |
7020 | ||
7021 | ||
7022 | /* Return TRUE if the asm expansion can be resolved. Generally it can | |
7023 | be resolved on a final link or when a partial link locates it in the | |
7024 | same section as the target. Set "is_reachable" flag if the target of | |
7025 | the call is within the range of a direct call, given the current VMA | |
7026 | for this section and the target section. */ | |
7027 | ||
7028 | bfd_boolean | |
7fa3d080 BW |
7029 | is_resolvable_asm_expansion (bfd *abfd, |
7030 | asection *sec, | |
7031 | bfd_byte *contents, | |
7032 | Elf_Internal_Rela *irel, | |
7033 | struct bfd_link_info *link_info, | |
7034 | bfd_boolean *is_reachable_p) | |
43cd72b9 BW |
7035 | { |
7036 | asection *target_sec; | |
7037 | bfd_vma target_offset; | |
7038 | r_reloc r_rel; | |
7039 | xtensa_opcode opcode, direct_call_opcode; | |
7040 | bfd_vma self_address; | |
7041 | bfd_vma dest_address; | |
7042 | bfd_boolean uses_l32r; | |
7043 | bfd_size_type sec_size; | |
7044 | ||
7045 | *is_reachable_p = FALSE; | |
7046 | ||
7047 | if (contents == NULL) | |
7048 | return FALSE; | |
7049 | ||
7050 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND) | |
7051 | return FALSE; | |
7052 | ||
7053 | sec_size = bfd_get_section_limit (abfd, sec); | |
7054 | opcode = get_expanded_call_opcode (contents + irel->r_offset, | |
7055 | sec_size - irel->r_offset, &uses_l32r); | |
7056 | /* Optimization of longcalls that use CONST16 is not yet implemented. */ | |
7057 | if (!uses_l32r) | |
7058 | return FALSE; | |
7059 | ||
7060 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
7061 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
7062 | return FALSE; | |
7063 | ||
7064 | /* Check and see that the target resolves. */ | |
7065 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7066 | if (!r_reloc_is_defined (&r_rel)) | |
7067 | return FALSE; | |
7068 | ||
7069 | target_sec = r_reloc_get_section (&r_rel); | |
7070 | target_offset = r_rel.target_offset; | |
7071 | ||
7072 | /* If the target is in a shared library, then it doesn't reach. This | |
7073 | isn't supposed to come up because the compiler should never generate | |
7074 | non-PIC calls on systems that use shared libraries, but the linker | |
7075 | shouldn't crash regardless. */ | |
7076 | if (!target_sec->output_section) | |
7077 | return FALSE; | |
7078 | ||
7079 | /* For relocatable sections, we can only simplify when the output | |
7080 | section of the target is the same as the output section of the | |
7081 | source. */ | |
7082 | if (link_info->relocatable | |
7083 | && (target_sec->output_section != sec->output_section | |
7084 | || is_reloc_sym_weak (abfd, irel))) | |
7085 | return FALSE; | |
7086 | ||
7087 | self_address = (sec->output_section->vma | |
7088 | + sec->output_offset + irel->r_offset + 3); | |
7089 | dest_address = (target_sec->output_section->vma | |
7090 | + target_sec->output_offset + target_offset); | |
7091 | ||
7092 | *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0, | |
7093 | self_address, dest_address); | |
7094 | ||
7095 | if ((self_address >> CALL_SEGMENT_BITS) != | |
7096 | (dest_address >> CALL_SEGMENT_BITS)) | |
7097 | return FALSE; | |
7098 | ||
7099 | return TRUE; | |
7100 | } | |
7101 | ||
7102 | ||
7103 | static Elf_Internal_Rela * | |
7fa3d080 BW |
7104 | find_associated_l32r_irel (bfd *abfd, |
7105 | asection *sec, | |
7106 | bfd_byte *contents, | |
7107 | Elf_Internal_Rela *other_irel, | |
7108 | Elf_Internal_Rela *internal_relocs) | |
43cd72b9 BW |
7109 | { |
7110 | unsigned i; | |
e0001a05 | 7111 | |
43cd72b9 BW |
7112 | for (i = 0; i < sec->reloc_count; i++) |
7113 | { | |
7114 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
e0001a05 | 7115 | |
43cd72b9 BW |
7116 | if (irel == other_irel) |
7117 | continue; | |
7118 | if (irel->r_offset != other_irel->r_offset) | |
7119 | continue; | |
7120 | if (is_l32r_relocation (abfd, sec, contents, irel)) | |
7121 | return irel; | |
7122 | } | |
7123 | ||
7124 | return NULL; | |
e0001a05 NC |
7125 | } |
7126 | ||
7127 | ||
cb337148 BW |
7128 | static xtensa_opcode * |
7129 | build_reloc_opcodes (bfd *abfd, | |
7130 | asection *sec, | |
7131 | bfd_byte *contents, | |
7132 | Elf_Internal_Rela *internal_relocs) | |
7133 | { | |
7134 | unsigned i; | |
7135 | xtensa_opcode *reloc_opcodes = | |
7136 | (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count); | |
7137 | for (i = 0; i < sec->reloc_count; i++) | |
7138 | { | |
7139 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7140 | reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel); | |
7141 | } | |
7142 | return reloc_opcodes; | |
7143 | } | |
7144 | ||
7145 | ||
43cd72b9 BW |
7146 | /* The compute_text_actions function will build a list of potential |
7147 | transformation actions for code in the extended basic block of each | |
7148 | longcall that is optimized to a direct call. From this list we | |
7149 | generate a set of actions to actually perform that optimizes for | |
7150 | space and, if not using size_opt, maintains branch target | |
7151 | alignments. | |
e0001a05 | 7152 | |
43cd72b9 BW |
7153 | These actions to be performed are placed on a per-section list. |
7154 | The actual changes are performed by relax_section() in the second | |
7155 | pass. */ | |
7156 | ||
7157 | bfd_boolean | |
7fa3d080 BW |
7158 | compute_text_actions (bfd *abfd, |
7159 | asection *sec, | |
7160 | struct bfd_link_info *link_info) | |
e0001a05 | 7161 | { |
cb337148 | 7162 | xtensa_opcode *reloc_opcodes = NULL; |
43cd72b9 | 7163 | xtensa_relax_info *relax_info; |
e0001a05 | 7164 | bfd_byte *contents; |
43cd72b9 | 7165 | Elf_Internal_Rela *internal_relocs; |
e0001a05 NC |
7166 | bfd_boolean ok = TRUE; |
7167 | unsigned i; | |
43cd72b9 BW |
7168 | property_table_entry *prop_table = 0; |
7169 | int ptblsize = 0; | |
7170 | bfd_size_type sec_size; | |
43cd72b9 | 7171 | |
43cd72b9 BW |
7172 | relax_info = get_xtensa_relax_info (sec); |
7173 | BFD_ASSERT (relax_info); | |
25c6282a BW |
7174 | BFD_ASSERT (relax_info->src_next == relax_info->src_count); |
7175 | ||
7176 | /* Do nothing if the section contains no optimized longcalls. */ | |
43cd72b9 BW |
7177 | if (!relax_info->is_relaxable_asm_section) |
7178 | return ok; | |
e0001a05 NC |
7179 | |
7180 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
7181 | link_info->keep_memory); | |
e0001a05 | 7182 | |
43cd72b9 BW |
7183 | if (internal_relocs) |
7184 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
7185 | internal_reloc_compare); | |
7186 | ||
7187 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 | 7188 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 7189 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
7190 | { |
7191 | ok = FALSE; | |
7192 | goto error_return; | |
7193 | } | |
7194 | ||
43cd72b9 BW |
7195 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
7196 | XTENSA_PROP_SEC_NAME, FALSE); | |
7197 | if (ptblsize < 0) | |
7198 | { | |
7199 | ok = FALSE; | |
7200 | goto error_return; | |
7201 | } | |
7202 | ||
7203 | for (i = 0; i < sec->reloc_count; i++) | |
e0001a05 NC |
7204 | { |
7205 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 BW |
7206 | bfd_vma r_offset; |
7207 | property_table_entry *the_entry; | |
7208 | int ptbl_idx; | |
7209 | ebb_t *ebb; | |
7210 | ebb_constraint ebb_table; | |
7211 | bfd_size_type simplify_size; | |
7212 | ||
7213 | if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY) | |
7214 | continue; | |
7215 | r_offset = irel->r_offset; | |
e0001a05 | 7216 | |
43cd72b9 BW |
7217 | simplify_size = get_asm_simplify_size (contents, sec_size, r_offset); |
7218 | if (simplify_size == 0) | |
7219 | { | |
7220 | (*_bfd_error_handler) | |
7221 | (_("%B(%A+0x%lx): could not decode instruction for XTENSA_ASM_SIMPLIFY relocation; possible configuration mismatch"), | |
7222 | sec->owner, sec, r_offset); | |
7223 | continue; | |
7224 | } | |
e0001a05 | 7225 | |
43cd72b9 BW |
7226 | /* If the instruction table is not around, then don't do this |
7227 | relaxation. */ | |
7228 | the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7229 | sec->vma + irel->r_offset); | |
7230 | if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL) | |
7231 | { | |
7232 | text_action_add (&relax_info->action_list, | |
7233 | ta_convert_longcall, sec, r_offset, | |
7234 | 0); | |
7235 | continue; | |
7236 | } | |
7237 | ||
7238 | /* If the next longcall happens to be at the same address as an | |
7239 | unreachable section of size 0, then skip forward. */ | |
7240 | ptbl_idx = the_entry - prop_table; | |
7241 | while ((the_entry->flags & XTENSA_PROP_UNREACHABLE) | |
7242 | && the_entry->size == 0 | |
7243 | && ptbl_idx + 1 < ptblsize | |
7244 | && (prop_table[ptbl_idx + 1].address | |
7245 | == prop_table[ptbl_idx].address)) | |
7246 | { | |
7247 | ptbl_idx++; | |
7248 | the_entry++; | |
7249 | } | |
e0001a05 | 7250 | |
99ded152 | 7251 | if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM) |
43cd72b9 BW |
7252 | /* NO_REORDER is OK */ |
7253 | continue; | |
e0001a05 | 7254 | |
43cd72b9 BW |
7255 | init_ebb_constraint (&ebb_table); |
7256 | ebb = &ebb_table.ebb; | |
7257 | init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize, | |
7258 | internal_relocs, sec->reloc_count); | |
7259 | ebb->start_offset = r_offset + simplify_size; | |
7260 | ebb->end_offset = r_offset + simplify_size; | |
7261 | ebb->start_ptbl_idx = ptbl_idx; | |
7262 | ebb->end_ptbl_idx = ptbl_idx; | |
7263 | ebb->start_reloc_idx = i; | |
7264 | ebb->end_reloc_idx = i; | |
7265 | ||
cb337148 BW |
7266 | /* Precompute the opcode for each relocation. */ |
7267 | if (reloc_opcodes == NULL) | |
7268 | reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, | |
7269 | internal_relocs); | |
7270 | ||
43cd72b9 BW |
7271 | if (!extend_ebb_bounds (ebb) |
7272 | || !compute_ebb_proposed_actions (&ebb_table) | |
7273 | || !compute_ebb_actions (&ebb_table) | |
7274 | || !check_section_ebb_pcrels_fit (abfd, sec, contents, | |
cb337148 BW |
7275 | internal_relocs, &ebb_table, |
7276 | reloc_opcodes) | |
43cd72b9 | 7277 | || !check_section_ebb_reduces (&ebb_table)) |
e0001a05 | 7278 | { |
43cd72b9 BW |
7279 | /* If anything goes wrong or we get unlucky and something does |
7280 | not fit, with our plan because of expansion between | |
7281 | critical branches, just convert to a NOP. */ | |
7282 | ||
7283 | text_action_add (&relax_info->action_list, | |
7284 | ta_convert_longcall, sec, r_offset, 0); | |
7285 | i = ebb_table.ebb.end_reloc_idx; | |
7286 | free_ebb_constraint (&ebb_table); | |
7287 | continue; | |
e0001a05 | 7288 | } |
43cd72b9 BW |
7289 | |
7290 | text_action_add_proposed (&relax_info->action_list, &ebb_table, sec); | |
7291 | ||
7292 | /* Update the index so we do not go looking at the relocations | |
7293 | we have already processed. */ | |
7294 | i = ebb_table.ebb.end_reloc_idx; | |
7295 | free_ebb_constraint (&ebb_table); | |
e0001a05 NC |
7296 | } |
7297 | ||
43cd72b9 | 7298 | #if DEBUG |
7fa3d080 | 7299 | if (relax_info->action_list.head) |
43cd72b9 BW |
7300 | print_action_list (stderr, &relax_info->action_list); |
7301 | #endif | |
7302 | ||
7303 | error_return: | |
e0001a05 NC |
7304 | release_contents (sec, contents); |
7305 | release_internal_relocs (sec, internal_relocs); | |
43cd72b9 BW |
7306 | if (prop_table) |
7307 | free (prop_table); | |
cb337148 BW |
7308 | if (reloc_opcodes) |
7309 | free (reloc_opcodes); | |
43cd72b9 | 7310 | |
e0001a05 NC |
7311 | return ok; |
7312 | } | |
7313 | ||
7314 | ||
64b607e6 BW |
7315 | /* Do not widen an instruction if it is preceeded by a |
7316 | loop opcode. It might cause misalignment. */ | |
7317 | ||
7318 | static bfd_boolean | |
7319 | prev_instr_is_a_loop (bfd_byte *contents, | |
7320 | bfd_size_type content_length, | |
7321 | bfd_size_type offset) | |
7322 | { | |
7323 | xtensa_opcode prev_opcode; | |
7324 | ||
7325 | if (offset < 3) | |
7326 | return FALSE; | |
7327 | prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0); | |
7328 | return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1); | |
7329 | } | |
7330 | ||
7331 | ||
43cd72b9 | 7332 | /* Find all of the possible actions for an extended basic block. */ |
e0001a05 | 7333 | |
43cd72b9 | 7334 | bfd_boolean |
7fa3d080 | 7335 | compute_ebb_proposed_actions (ebb_constraint *ebb_table) |
e0001a05 | 7336 | { |
43cd72b9 BW |
7337 | const ebb_t *ebb = &ebb_table->ebb; |
7338 | unsigned rel_idx = ebb->start_reloc_idx; | |
7339 | property_table_entry *entry, *start_entry, *end_entry; | |
64b607e6 BW |
7340 | bfd_vma offset = 0; |
7341 | xtensa_isa isa = xtensa_default_isa; | |
7342 | xtensa_format fmt; | |
7343 | static xtensa_insnbuf insnbuf = NULL; | |
7344 | static xtensa_insnbuf slotbuf = NULL; | |
7345 | ||
7346 | if (insnbuf == NULL) | |
7347 | { | |
7348 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7349 | slotbuf = xtensa_insnbuf_alloc (isa); | |
7350 | } | |
e0001a05 | 7351 | |
43cd72b9 BW |
7352 | start_entry = &ebb->ptbl[ebb->start_ptbl_idx]; |
7353 | end_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
e0001a05 | 7354 | |
43cd72b9 | 7355 | for (entry = start_entry; entry <= end_entry; entry++) |
e0001a05 | 7356 | { |
64b607e6 | 7357 | bfd_vma start_offset, end_offset; |
43cd72b9 | 7358 | bfd_size_type insn_len; |
e0001a05 | 7359 | |
43cd72b9 BW |
7360 | start_offset = entry->address - ebb->sec->vma; |
7361 | end_offset = entry->address + entry->size - ebb->sec->vma; | |
e0001a05 | 7362 | |
43cd72b9 BW |
7363 | if (entry == start_entry) |
7364 | start_offset = ebb->start_offset; | |
7365 | if (entry == end_entry) | |
7366 | end_offset = ebb->end_offset; | |
7367 | offset = start_offset; | |
e0001a05 | 7368 | |
43cd72b9 BW |
7369 | if (offset == entry->address - ebb->sec->vma |
7370 | && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0) | |
7371 | { | |
7372 | enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN; | |
7373 | BFD_ASSERT (offset != end_offset); | |
7374 | if (offset == end_offset) | |
7375 | return FALSE; | |
e0001a05 | 7376 | |
43cd72b9 BW |
7377 | insn_len = insn_decode_len (ebb->contents, ebb->content_length, |
7378 | offset); | |
43cd72b9 | 7379 | if (insn_len == 0) |
64b607e6 BW |
7380 | goto decode_error; |
7381 | ||
43cd72b9 BW |
7382 | if (check_branch_target_aligned_address (offset, insn_len)) |
7383 | align_type = EBB_REQUIRE_TGT_ALIGN; | |
7384 | ||
7385 | ebb_propose_action (ebb_table, align_type, 0, | |
7386 | ta_none, offset, 0, TRUE); | |
7387 | } | |
7388 | ||
7389 | while (offset != end_offset) | |
e0001a05 | 7390 | { |
43cd72b9 | 7391 | Elf_Internal_Rela *irel; |
e0001a05 | 7392 | xtensa_opcode opcode; |
e0001a05 | 7393 | |
43cd72b9 BW |
7394 | while (rel_idx < ebb->end_reloc_idx |
7395 | && (ebb->relocs[rel_idx].r_offset < offset | |
7396 | || (ebb->relocs[rel_idx].r_offset == offset | |
7397 | && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info) | |
7398 | != R_XTENSA_ASM_SIMPLIFY)))) | |
7399 | rel_idx++; | |
7400 | ||
7401 | /* Check for longcall. */ | |
7402 | irel = &ebb->relocs[rel_idx]; | |
7403 | if (irel->r_offset == offset | |
7404 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY) | |
7405 | { | |
7406 | bfd_size_type simplify_size; | |
e0001a05 | 7407 | |
43cd72b9 BW |
7408 | simplify_size = get_asm_simplify_size (ebb->contents, |
7409 | ebb->content_length, | |
7410 | irel->r_offset); | |
7411 | if (simplify_size == 0) | |
64b607e6 | 7412 | goto decode_error; |
43cd72b9 BW |
7413 | |
7414 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7415 | ta_convert_longcall, offset, 0, TRUE); | |
7416 | ||
7417 | offset += simplify_size; | |
7418 | continue; | |
7419 | } | |
e0001a05 | 7420 | |
64b607e6 BW |
7421 | if (offset + MIN_INSN_LENGTH > ebb->content_length) |
7422 | goto decode_error; | |
7423 | xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset], | |
7424 | ebb->content_length - offset); | |
7425 | fmt = xtensa_format_decode (isa, insnbuf); | |
7426 | if (fmt == XTENSA_UNDEFINED) | |
7427 | goto decode_error; | |
7428 | insn_len = xtensa_format_length (isa, fmt); | |
7429 | if (insn_len == (bfd_size_type) XTENSA_UNDEFINED) | |
7430 | goto decode_error; | |
7431 | ||
7432 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
43cd72b9 | 7433 | { |
64b607e6 BW |
7434 | offset += insn_len; |
7435 | continue; | |
43cd72b9 | 7436 | } |
64b607e6 BW |
7437 | |
7438 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
7439 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
7440 | if (opcode == XTENSA_UNDEFINED) | |
7441 | goto decode_error; | |
7442 | ||
43cd72b9 | 7443 | if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0 |
99ded152 | 7444 | && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 | 7445 | && can_narrow_instruction (slotbuf, fmt, opcode) != 0) |
43cd72b9 BW |
7446 | { |
7447 | /* Add an instruction narrow action. */ | |
7448 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7449 | ta_narrow_insn, offset, 0, FALSE); | |
43cd72b9 | 7450 | } |
99ded152 | 7451 | else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 BW |
7452 | && can_widen_instruction (slotbuf, fmt, opcode) != 0 |
7453 | && ! prev_instr_is_a_loop (ebb->contents, | |
7454 | ebb->content_length, offset)) | |
43cd72b9 BW |
7455 | { |
7456 | /* Add an instruction widen action. */ | |
7457 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7458 | ta_widen_insn, offset, 0, FALSE); | |
43cd72b9 | 7459 | } |
64b607e6 | 7460 | else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1) |
43cd72b9 BW |
7461 | { |
7462 | /* Check for branch targets. */ | |
7463 | ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0, | |
7464 | ta_none, offset, 0, TRUE); | |
43cd72b9 BW |
7465 | } |
7466 | ||
7467 | offset += insn_len; | |
e0001a05 NC |
7468 | } |
7469 | } | |
7470 | ||
43cd72b9 BW |
7471 | if (ebb->ends_unreachable) |
7472 | { | |
7473 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7474 | ta_fill, ebb->end_offset, 0, TRUE); | |
7475 | } | |
e0001a05 | 7476 | |
43cd72b9 | 7477 | return TRUE; |
64b607e6 BW |
7478 | |
7479 | decode_error: | |
7480 | (*_bfd_error_handler) | |
7481 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
7482 | ebb->sec->owner, ebb->sec, offset); | |
7483 | return FALSE; | |
43cd72b9 BW |
7484 | } |
7485 | ||
7486 | ||
7487 | /* After all of the information has collected about the | |
7488 | transformations possible in an EBB, compute the appropriate actions | |
7489 | here in compute_ebb_actions. We still must check later to make | |
7490 | sure that the actions do not break any relocations. The algorithm | |
7491 | used here is pretty greedy. Basically, it removes as many no-ops | |
7492 | as possible so that the end of the EBB has the same alignment | |
7493 | characteristics as the original. First, it uses narrowing, then | |
7494 | fill space at the end of the EBB, and finally widenings. If that | |
7495 | does not work, it tries again with one fewer no-op removed. The | |
7496 | optimization will only be performed if all of the branch targets | |
7497 | that were aligned before transformation are also aligned after the | |
7498 | transformation. | |
7499 | ||
7500 | When the size_opt flag is set, ignore the branch target alignments, | |
7501 | narrow all wide instructions, and remove all no-ops unless the end | |
7502 | of the EBB prevents it. */ | |
7503 | ||
7504 | bfd_boolean | |
7fa3d080 | 7505 | compute_ebb_actions (ebb_constraint *ebb_table) |
43cd72b9 BW |
7506 | { |
7507 | unsigned i = 0; | |
7508 | unsigned j; | |
7509 | int removed_bytes = 0; | |
7510 | ebb_t *ebb = &ebb_table->ebb; | |
7511 | unsigned seg_idx_start = 0; | |
7512 | unsigned seg_idx_end = 0; | |
7513 | ||
7514 | /* We perform this like the assembler relaxation algorithm: Start by | |
7515 | assuming all instructions are narrow and all no-ops removed; then | |
7516 | walk through.... */ | |
7517 | ||
7518 | /* For each segment of this that has a solid constraint, check to | |
7519 | see if there are any combinations that will keep the constraint. | |
7520 | If so, use it. */ | |
7521 | for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++) | |
e0001a05 | 7522 | { |
43cd72b9 BW |
7523 | bfd_boolean requires_text_end_align = FALSE; |
7524 | unsigned longcall_count = 0; | |
7525 | unsigned longcall_convert_count = 0; | |
7526 | unsigned narrowable_count = 0; | |
7527 | unsigned narrowable_convert_count = 0; | |
7528 | unsigned widenable_count = 0; | |
7529 | unsigned widenable_convert_count = 0; | |
e0001a05 | 7530 | |
43cd72b9 BW |
7531 | proposed_action *action = NULL; |
7532 | int align = (1 << ebb_table->ebb.sec->alignment_power); | |
e0001a05 | 7533 | |
43cd72b9 | 7534 | seg_idx_start = seg_idx_end; |
e0001a05 | 7535 | |
43cd72b9 BW |
7536 | for (i = seg_idx_start; i < ebb_table->action_count; i++) |
7537 | { | |
7538 | action = &ebb_table->actions[i]; | |
7539 | if (action->action == ta_convert_longcall) | |
7540 | longcall_count++; | |
7541 | if (action->action == ta_narrow_insn) | |
7542 | narrowable_count++; | |
7543 | if (action->action == ta_widen_insn) | |
7544 | widenable_count++; | |
7545 | if (action->action == ta_fill) | |
7546 | break; | |
7547 | if (action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
7548 | break; | |
7549 | if (action->align_type == EBB_REQUIRE_TGT_ALIGN | |
7550 | && !elf32xtensa_size_opt) | |
7551 | break; | |
7552 | } | |
7553 | seg_idx_end = i; | |
e0001a05 | 7554 | |
43cd72b9 BW |
7555 | if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable) |
7556 | requires_text_end_align = TRUE; | |
e0001a05 | 7557 | |
43cd72b9 BW |
7558 | if (elf32xtensa_size_opt && !requires_text_end_align |
7559 | && action->align_type != EBB_REQUIRE_LOOP_ALIGN | |
7560 | && action->align_type != EBB_REQUIRE_TGT_ALIGN) | |
7561 | { | |
7562 | longcall_convert_count = longcall_count; | |
7563 | narrowable_convert_count = narrowable_count; | |
7564 | widenable_convert_count = 0; | |
7565 | } | |
7566 | else | |
7567 | { | |
7568 | /* There is a constraint. Convert the max number of longcalls. */ | |
7569 | narrowable_convert_count = 0; | |
7570 | longcall_convert_count = 0; | |
7571 | widenable_convert_count = 0; | |
e0001a05 | 7572 | |
43cd72b9 | 7573 | for (j = 0; j < longcall_count; j++) |
e0001a05 | 7574 | { |
43cd72b9 BW |
7575 | int removed = (longcall_count - j) * 3 & (align - 1); |
7576 | unsigned desire_narrow = (align - removed) & (align - 1); | |
7577 | unsigned desire_widen = removed; | |
7578 | if (desire_narrow <= narrowable_count) | |
7579 | { | |
7580 | narrowable_convert_count = desire_narrow; | |
7581 | narrowable_convert_count += | |
7582 | (align * ((narrowable_count - narrowable_convert_count) | |
7583 | / align)); | |
7584 | longcall_convert_count = (longcall_count - j); | |
7585 | widenable_convert_count = 0; | |
7586 | break; | |
7587 | } | |
7588 | if (desire_widen <= widenable_count && !elf32xtensa_size_opt) | |
7589 | { | |
7590 | narrowable_convert_count = 0; | |
7591 | longcall_convert_count = longcall_count - j; | |
7592 | widenable_convert_count = desire_widen; | |
7593 | break; | |
7594 | } | |
7595 | } | |
7596 | } | |
e0001a05 | 7597 | |
43cd72b9 BW |
7598 | /* Now the number of conversions are saved. Do them. */ |
7599 | for (i = seg_idx_start; i < seg_idx_end; i++) | |
7600 | { | |
7601 | action = &ebb_table->actions[i]; | |
7602 | switch (action->action) | |
7603 | { | |
7604 | case ta_convert_longcall: | |
7605 | if (longcall_convert_count != 0) | |
7606 | { | |
7607 | action->action = ta_remove_longcall; | |
7608 | action->do_action = TRUE; | |
7609 | action->removed_bytes += 3; | |
7610 | longcall_convert_count--; | |
7611 | } | |
7612 | break; | |
7613 | case ta_narrow_insn: | |
7614 | if (narrowable_convert_count != 0) | |
7615 | { | |
7616 | action->do_action = TRUE; | |
7617 | action->removed_bytes += 1; | |
7618 | narrowable_convert_count--; | |
7619 | } | |
7620 | break; | |
7621 | case ta_widen_insn: | |
7622 | if (widenable_convert_count != 0) | |
7623 | { | |
7624 | action->do_action = TRUE; | |
7625 | action->removed_bytes -= 1; | |
7626 | widenable_convert_count--; | |
7627 | } | |
7628 | break; | |
7629 | default: | |
7630 | break; | |
e0001a05 | 7631 | } |
43cd72b9 BW |
7632 | } |
7633 | } | |
e0001a05 | 7634 | |
43cd72b9 BW |
7635 | /* Now we move on to some local opts. Try to remove each of the |
7636 | remaining longcalls. */ | |
e0001a05 | 7637 | |
43cd72b9 BW |
7638 | if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable) |
7639 | { | |
7640 | removed_bytes = 0; | |
7641 | for (i = 0; i < ebb_table->action_count; i++) | |
e0001a05 | 7642 | { |
43cd72b9 BW |
7643 | int old_removed_bytes = removed_bytes; |
7644 | proposed_action *action = &ebb_table->actions[i]; | |
7645 | ||
7646 | if (action->do_action && action->action == ta_convert_longcall) | |
7647 | { | |
7648 | bfd_boolean bad_alignment = FALSE; | |
7649 | removed_bytes += 3; | |
7650 | for (j = i + 1; j < ebb_table->action_count; j++) | |
7651 | { | |
7652 | proposed_action *new_action = &ebb_table->actions[j]; | |
7653 | bfd_vma offset = new_action->offset; | |
7654 | if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN) | |
7655 | { | |
7656 | if (!check_branch_target_aligned | |
7657 | (ebb_table->ebb.contents, | |
7658 | ebb_table->ebb.content_length, | |
7659 | offset, offset - removed_bytes)) | |
7660 | { | |
7661 | bad_alignment = TRUE; | |
7662 | break; | |
7663 | } | |
7664 | } | |
7665 | if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
7666 | { | |
7667 | if (!check_loop_aligned (ebb_table->ebb.contents, | |
7668 | ebb_table->ebb.content_length, | |
7669 | offset, | |
7670 | offset - removed_bytes)) | |
7671 | { | |
7672 | bad_alignment = TRUE; | |
7673 | break; | |
7674 | } | |
7675 | } | |
7676 | if (new_action->action == ta_narrow_insn | |
7677 | && !new_action->do_action | |
7678 | && ebb_table->ebb.sec->alignment_power == 2) | |
7679 | { | |
7680 | /* Narrow an instruction and we are done. */ | |
7681 | new_action->do_action = TRUE; | |
7682 | new_action->removed_bytes += 1; | |
7683 | bad_alignment = FALSE; | |
7684 | break; | |
7685 | } | |
7686 | if (new_action->action == ta_widen_insn | |
7687 | && new_action->do_action | |
7688 | && ebb_table->ebb.sec->alignment_power == 2) | |
7689 | { | |
7690 | /* Narrow an instruction and we are done. */ | |
7691 | new_action->do_action = FALSE; | |
7692 | new_action->removed_bytes += 1; | |
7693 | bad_alignment = FALSE; | |
7694 | break; | |
7695 | } | |
5c5d6806 BW |
7696 | if (new_action->do_action) |
7697 | removed_bytes += new_action->removed_bytes; | |
43cd72b9 BW |
7698 | } |
7699 | if (!bad_alignment) | |
7700 | { | |
7701 | action->removed_bytes += 3; | |
7702 | action->action = ta_remove_longcall; | |
7703 | action->do_action = TRUE; | |
7704 | } | |
7705 | } | |
7706 | removed_bytes = old_removed_bytes; | |
7707 | if (action->do_action) | |
7708 | removed_bytes += action->removed_bytes; | |
e0001a05 NC |
7709 | } |
7710 | } | |
7711 | ||
43cd72b9 BW |
7712 | removed_bytes = 0; |
7713 | for (i = 0; i < ebb_table->action_count; ++i) | |
7714 | { | |
7715 | proposed_action *action = &ebb_table->actions[i]; | |
7716 | if (action->do_action) | |
7717 | removed_bytes += action->removed_bytes; | |
7718 | } | |
7719 | ||
7720 | if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0 | |
7721 | && ebb->ends_unreachable) | |
7722 | { | |
7723 | proposed_action *action; | |
7724 | int br; | |
7725 | int extra_space; | |
7726 | ||
7727 | BFD_ASSERT (ebb_table->action_count != 0); | |
7728 | action = &ebb_table->actions[ebb_table->action_count - 1]; | |
7729 | BFD_ASSERT (action->action == ta_fill); | |
7730 | BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE); | |
7731 | ||
7732 | extra_space = compute_fill_extra_space (ebb->ends_unreachable); | |
7733 | br = action->removed_bytes + removed_bytes + extra_space; | |
7734 | br = br & ((1 << ebb->sec->alignment_power ) - 1); | |
7735 | ||
7736 | action->removed_bytes = extra_space - br; | |
7737 | } | |
7738 | return TRUE; | |
e0001a05 NC |
7739 | } |
7740 | ||
7741 | ||
03e94c08 BW |
7742 | /* The xlate_map is a sorted array of address mappings designed to |
7743 | answer the offset_with_removed_text() query with a binary search instead | |
7744 | of a linear search through the section's action_list. */ | |
7745 | ||
7746 | typedef struct xlate_map_entry xlate_map_entry_t; | |
7747 | typedef struct xlate_map xlate_map_t; | |
7748 | ||
7749 | struct xlate_map_entry | |
7750 | { | |
7751 | unsigned orig_address; | |
7752 | unsigned new_address; | |
7753 | unsigned size; | |
7754 | }; | |
7755 | ||
7756 | struct xlate_map | |
7757 | { | |
7758 | unsigned entry_count; | |
7759 | xlate_map_entry_t *entry; | |
7760 | }; | |
7761 | ||
7762 | ||
7763 | static int | |
7764 | xlate_compare (const void *a_v, const void *b_v) | |
7765 | { | |
7766 | const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v; | |
7767 | const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v; | |
7768 | if (a->orig_address < b->orig_address) | |
7769 | return -1; | |
7770 | if (a->orig_address > (b->orig_address + b->size - 1)) | |
7771 | return 1; | |
7772 | return 0; | |
7773 | } | |
7774 | ||
7775 | ||
7776 | static bfd_vma | |
7777 | xlate_offset_with_removed_text (const xlate_map_t *map, | |
7778 | text_action_list *action_list, | |
7779 | bfd_vma offset) | |
7780 | { | |
7781 | xlate_map_entry_t tmp; | |
7782 | void *r; | |
7783 | xlate_map_entry_t *e; | |
7784 | ||
7785 | if (map == NULL) | |
7786 | return offset_with_removed_text (action_list, offset); | |
7787 | ||
7788 | if (map->entry_count == 0) | |
7789 | return offset; | |
7790 | ||
7791 | tmp.orig_address = offset; | |
7792 | tmp.new_address = offset; | |
7793 | tmp.size = 1; | |
7794 | ||
7795 | r = bsearch (&offset, map->entry, map->entry_count, | |
7796 | sizeof (xlate_map_entry_t), &xlate_compare); | |
7797 | e = (xlate_map_entry_t *) r; | |
7798 | ||
7799 | BFD_ASSERT (e != NULL); | |
7800 | if (e == NULL) | |
7801 | return offset; | |
7802 | return e->new_address - e->orig_address + offset; | |
7803 | } | |
7804 | ||
7805 | ||
7806 | /* Build a binary searchable offset translation map from a section's | |
7807 | action list. */ | |
7808 | ||
7809 | static xlate_map_t * | |
7810 | build_xlate_map (asection *sec, xtensa_relax_info *relax_info) | |
7811 | { | |
7812 | xlate_map_t *map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t)); | |
7813 | text_action_list *action_list = &relax_info->action_list; | |
7814 | unsigned num_actions = 0; | |
7815 | text_action *r; | |
7816 | int removed; | |
7817 | xlate_map_entry_t *current_entry; | |
7818 | ||
7819 | if (map == NULL) | |
7820 | return NULL; | |
7821 | ||
7822 | num_actions = action_list_count (action_list); | |
7823 | map->entry = (xlate_map_entry_t *) | |
7824 | bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1)); | |
7825 | if (map->entry == NULL) | |
7826 | { | |
7827 | free (map); | |
7828 | return NULL; | |
7829 | } | |
7830 | map->entry_count = 0; | |
7831 | ||
7832 | removed = 0; | |
7833 | current_entry = &map->entry[0]; | |
7834 | ||
7835 | current_entry->orig_address = 0; | |
7836 | current_entry->new_address = 0; | |
7837 | current_entry->size = 0; | |
7838 | ||
7839 | for (r = action_list->head; r != NULL; r = r->next) | |
7840 | { | |
7841 | unsigned orig_size = 0; | |
7842 | switch (r->action) | |
7843 | { | |
7844 | case ta_none: | |
7845 | case ta_remove_insn: | |
7846 | case ta_convert_longcall: | |
7847 | case ta_remove_literal: | |
7848 | case ta_add_literal: | |
7849 | break; | |
7850 | case ta_remove_longcall: | |
7851 | orig_size = 6; | |
7852 | break; | |
7853 | case ta_narrow_insn: | |
7854 | orig_size = 3; | |
7855 | break; | |
7856 | case ta_widen_insn: | |
7857 | orig_size = 2; | |
7858 | break; | |
7859 | case ta_fill: | |
7860 | break; | |
7861 | } | |
7862 | current_entry->size = | |
7863 | r->offset + orig_size - current_entry->orig_address; | |
7864 | if (current_entry->size != 0) | |
7865 | { | |
7866 | current_entry++; | |
7867 | map->entry_count++; | |
7868 | } | |
7869 | current_entry->orig_address = r->offset + orig_size; | |
7870 | removed += r->removed_bytes; | |
7871 | current_entry->new_address = r->offset + orig_size - removed; | |
7872 | current_entry->size = 0; | |
7873 | } | |
7874 | ||
7875 | current_entry->size = (bfd_get_section_limit (sec->owner, sec) | |
7876 | - current_entry->orig_address); | |
7877 | if (current_entry->size != 0) | |
7878 | map->entry_count++; | |
7879 | ||
7880 | return map; | |
7881 | } | |
7882 | ||
7883 | ||
7884 | /* Free an offset translation map. */ | |
7885 | ||
7886 | static void | |
7887 | free_xlate_map (xlate_map_t *map) | |
7888 | { | |
7889 | if (map && map->entry) | |
7890 | free (map->entry); | |
7891 | if (map) | |
7892 | free (map); | |
7893 | } | |
7894 | ||
7895 | ||
43cd72b9 BW |
7896 | /* Use check_section_ebb_pcrels_fit to make sure that all of the |
7897 | relocations in a section will fit if a proposed set of actions | |
7898 | are performed. */ | |
e0001a05 | 7899 | |
43cd72b9 | 7900 | static bfd_boolean |
7fa3d080 BW |
7901 | check_section_ebb_pcrels_fit (bfd *abfd, |
7902 | asection *sec, | |
7903 | bfd_byte *contents, | |
7904 | Elf_Internal_Rela *internal_relocs, | |
cb337148 BW |
7905 | const ebb_constraint *constraint, |
7906 | const xtensa_opcode *reloc_opcodes) | |
e0001a05 | 7907 | { |
43cd72b9 BW |
7908 | unsigned i, j; |
7909 | Elf_Internal_Rela *irel; | |
03e94c08 BW |
7910 | xlate_map_t *xmap = NULL; |
7911 | bfd_boolean ok = TRUE; | |
43cd72b9 | 7912 | xtensa_relax_info *relax_info; |
e0001a05 | 7913 | |
43cd72b9 | 7914 | relax_info = get_xtensa_relax_info (sec); |
e0001a05 | 7915 | |
03e94c08 BW |
7916 | if (relax_info && sec->reloc_count > 100) |
7917 | { | |
7918 | xmap = build_xlate_map (sec, relax_info); | |
7919 | /* NULL indicates out of memory, but the slow version | |
7920 | can still be used. */ | |
7921 | } | |
7922 | ||
43cd72b9 BW |
7923 | for (i = 0; i < sec->reloc_count; i++) |
7924 | { | |
7925 | r_reloc r_rel; | |
7926 | bfd_vma orig_self_offset, orig_target_offset; | |
7927 | bfd_vma self_offset, target_offset; | |
7928 | int r_type; | |
7929 | reloc_howto_type *howto; | |
7930 | int self_removed_bytes, target_removed_bytes; | |
e0001a05 | 7931 | |
43cd72b9 BW |
7932 | irel = &internal_relocs[i]; |
7933 | r_type = ELF32_R_TYPE (irel->r_info); | |
e0001a05 | 7934 | |
43cd72b9 BW |
7935 | howto = &elf_howto_table[r_type]; |
7936 | /* We maintain the required invariant: PC-relative relocations | |
7937 | that fit before linking must fit after linking. Thus we only | |
7938 | need to deal with relocations to the same section that are | |
7939 | PC-relative. */ | |
1bbb5f21 BW |
7940 | if (r_type == R_XTENSA_ASM_SIMPLIFY |
7941 | || r_type == R_XTENSA_32_PCREL | |
43cd72b9 BW |
7942 | || !howto->pc_relative) |
7943 | continue; | |
e0001a05 | 7944 | |
43cd72b9 BW |
7945 | r_reloc_init (&r_rel, abfd, irel, contents, |
7946 | bfd_get_section_limit (abfd, sec)); | |
e0001a05 | 7947 | |
43cd72b9 BW |
7948 | if (r_reloc_get_section (&r_rel) != sec) |
7949 | continue; | |
e0001a05 | 7950 | |
43cd72b9 BW |
7951 | orig_self_offset = irel->r_offset; |
7952 | orig_target_offset = r_rel.target_offset; | |
e0001a05 | 7953 | |
43cd72b9 BW |
7954 | self_offset = orig_self_offset; |
7955 | target_offset = orig_target_offset; | |
7956 | ||
7957 | if (relax_info) | |
7958 | { | |
03e94c08 BW |
7959 | self_offset = |
7960 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7961 | orig_self_offset); | |
7962 | target_offset = | |
7963 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7964 | orig_target_offset); | |
43cd72b9 BW |
7965 | } |
7966 | ||
7967 | self_removed_bytes = 0; | |
7968 | target_removed_bytes = 0; | |
7969 | ||
7970 | for (j = 0; j < constraint->action_count; ++j) | |
7971 | { | |
7972 | proposed_action *action = &constraint->actions[j]; | |
7973 | bfd_vma offset = action->offset; | |
7974 | int removed_bytes = action->removed_bytes; | |
7975 | if (offset < orig_self_offset | |
7976 | || (offset == orig_self_offset && action->action == ta_fill | |
7977 | && action->removed_bytes < 0)) | |
7978 | self_removed_bytes += removed_bytes; | |
7979 | if (offset < orig_target_offset | |
7980 | || (offset == orig_target_offset && action->action == ta_fill | |
7981 | && action->removed_bytes < 0)) | |
7982 | target_removed_bytes += removed_bytes; | |
7983 | } | |
7984 | self_offset -= self_removed_bytes; | |
7985 | target_offset -= target_removed_bytes; | |
7986 | ||
7987 | /* Try to encode it. Get the operand and check. */ | |
7988 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
7989 | { | |
7990 | /* None of the current alternate relocs are PC-relative, | |
7991 | and only PC-relative relocs matter here. */ | |
7992 | } | |
7993 | else | |
7994 | { | |
7995 | xtensa_opcode opcode; | |
7996 | int opnum; | |
7997 | ||
cb337148 BW |
7998 | if (reloc_opcodes) |
7999 | opcode = reloc_opcodes[i]; | |
8000 | else | |
8001 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
43cd72b9 | 8002 | if (opcode == XTENSA_UNDEFINED) |
03e94c08 BW |
8003 | { |
8004 | ok = FALSE; | |
8005 | break; | |
8006 | } | |
43cd72b9 BW |
8007 | |
8008 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
8009 | if (opnum == XTENSA_UNDEFINED) | |
03e94c08 BW |
8010 | { |
8011 | ok = FALSE; | |
8012 | break; | |
8013 | } | |
43cd72b9 BW |
8014 | |
8015 | if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset)) | |
03e94c08 BW |
8016 | { |
8017 | ok = FALSE; | |
8018 | break; | |
8019 | } | |
43cd72b9 BW |
8020 | } |
8021 | } | |
8022 | ||
03e94c08 BW |
8023 | if (xmap) |
8024 | free_xlate_map (xmap); | |
8025 | ||
8026 | return ok; | |
43cd72b9 BW |
8027 | } |
8028 | ||
8029 | ||
8030 | static bfd_boolean | |
7fa3d080 | 8031 | check_section_ebb_reduces (const ebb_constraint *constraint) |
43cd72b9 BW |
8032 | { |
8033 | int removed = 0; | |
8034 | unsigned i; | |
8035 | ||
8036 | for (i = 0; i < constraint->action_count; i++) | |
8037 | { | |
8038 | const proposed_action *action = &constraint->actions[i]; | |
8039 | if (action->do_action) | |
8040 | removed += action->removed_bytes; | |
8041 | } | |
8042 | if (removed < 0) | |
e0001a05 NC |
8043 | return FALSE; |
8044 | ||
8045 | return TRUE; | |
8046 | } | |
8047 | ||
8048 | ||
43cd72b9 | 8049 | void |
7fa3d080 BW |
8050 | text_action_add_proposed (text_action_list *l, |
8051 | const ebb_constraint *ebb_table, | |
8052 | asection *sec) | |
e0001a05 NC |
8053 | { |
8054 | unsigned i; | |
8055 | ||
43cd72b9 | 8056 | for (i = 0; i < ebb_table->action_count; i++) |
e0001a05 | 8057 | { |
43cd72b9 | 8058 | proposed_action *action = &ebb_table->actions[i]; |
e0001a05 | 8059 | |
43cd72b9 | 8060 | if (!action->do_action) |
e0001a05 | 8061 | continue; |
43cd72b9 BW |
8062 | switch (action->action) |
8063 | { | |
8064 | case ta_remove_insn: | |
8065 | case ta_remove_longcall: | |
8066 | case ta_convert_longcall: | |
8067 | case ta_narrow_insn: | |
8068 | case ta_widen_insn: | |
8069 | case ta_fill: | |
8070 | case ta_remove_literal: | |
8071 | text_action_add (l, action->action, sec, action->offset, | |
8072 | action->removed_bytes); | |
8073 | break; | |
8074 | case ta_none: | |
8075 | break; | |
8076 | default: | |
8077 | BFD_ASSERT (0); | |
8078 | break; | |
8079 | } | |
e0001a05 | 8080 | } |
43cd72b9 | 8081 | } |
e0001a05 | 8082 | |
43cd72b9 BW |
8083 | |
8084 | int | |
7fa3d080 | 8085 | compute_fill_extra_space (property_table_entry *entry) |
43cd72b9 BW |
8086 | { |
8087 | int fill_extra_space; | |
8088 | ||
8089 | if (!entry) | |
8090 | return 0; | |
8091 | ||
8092 | if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0) | |
8093 | return 0; | |
8094 | ||
8095 | fill_extra_space = entry->size; | |
8096 | if ((entry->flags & XTENSA_PROP_ALIGN) != 0) | |
8097 | { | |
8098 | /* Fill bytes for alignment: | |
8099 | (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */ | |
8100 | int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags); | |
8101 | int nsm = (1 << pow) - 1; | |
8102 | bfd_vma addr = entry->address + entry->size; | |
8103 | bfd_vma align_fill = nsm - ((addr + nsm) & nsm); | |
8104 | fill_extra_space += align_fill; | |
8105 | } | |
8106 | return fill_extra_space; | |
e0001a05 NC |
8107 | } |
8108 | ||
43cd72b9 | 8109 | \f |
e0001a05 NC |
8110 | /* First relaxation pass. */ |
8111 | ||
43cd72b9 BW |
8112 | /* If the section contains relaxable literals, check each literal to |
8113 | see if it has the same value as another literal that has already | |
8114 | been seen, either in the current section or a previous one. If so, | |
8115 | add an entry to the per-section list of removed literals. The | |
e0001a05 NC |
8116 | actual changes are deferred until the next pass. */ |
8117 | ||
8118 | static bfd_boolean | |
7fa3d080 BW |
8119 | compute_removed_literals (bfd *abfd, |
8120 | asection *sec, | |
8121 | struct bfd_link_info *link_info, | |
8122 | value_map_hash_table *values) | |
e0001a05 NC |
8123 | { |
8124 | xtensa_relax_info *relax_info; | |
8125 | bfd_byte *contents; | |
8126 | Elf_Internal_Rela *internal_relocs; | |
43cd72b9 | 8127 | source_reloc *src_relocs, *rel; |
e0001a05 | 8128 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
8129 | property_table_entry *prop_table = NULL; |
8130 | int ptblsize; | |
8131 | int i, prev_i; | |
8132 | bfd_boolean last_loc_is_prev = FALSE; | |
8133 | bfd_vma last_target_offset = 0; | |
8134 | section_cache_t target_sec_cache; | |
8135 | bfd_size_type sec_size; | |
8136 | ||
8137 | init_section_cache (&target_sec_cache); | |
e0001a05 NC |
8138 | |
8139 | /* Do nothing if it is not a relaxable literal section. */ | |
8140 | relax_info = get_xtensa_relax_info (sec); | |
8141 | BFD_ASSERT (relax_info); | |
e0001a05 NC |
8142 | if (!relax_info->is_relaxable_literal_section) |
8143 | return ok; | |
8144 | ||
8145 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
8146 | link_info->keep_memory); | |
8147 | ||
43cd72b9 | 8148 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 | 8149 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 8150 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
8151 | { |
8152 | ok = FALSE; | |
8153 | goto error_return; | |
8154 | } | |
8155 | ||
8156 | /* Sort the source_relocs by target offset. */ | |
8157 | src_relocs = relax_info->src_relocs; | |
8158 | qsort (src_relocs, relax_info->src_count, | |
8159 | sizeof (source_reloc), source_reloc_compare); | |
43cd72b9 BW |
8160 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
8161 | internal_reloc_compare); | |
e0001a05 | 8162 | |
43cd72b9 BW |
8163 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
8164 | XTENSA_PROP_SEC_NAME, FALSE); | |
8165 | if (ptblsize < 0) | |
8166 | { | |
8167 | ok = FALSE; | |
8168 | goto error_return; | |
8169 | } | |
8170 | ||
8171 | prev_i = -1; | |
e0001a05 NC |
8172 | for (i = 0; i < relax_info->src_count; i++) |
8173 | { | |
e0001a05 | 8174 | Elf_Internal_Rela *irel = NULL; |
e0001a05 NC |
8175 | |
8176 | rel = &src_relocs[i]; | |
43cd72b9 BW |
8177 | if (get_l32r_opcode () != rel->opcode) |
8178 | continue; | |
e0001a05 NC |
8179 | irel = get_irel_at_offset (sec, internal_relocs, |
8180 | rel->r_rel.target_offset); | |
8181 | ||
43cd72b9 BW |
8182 | /* If the relocation on this is not a simple R_XTENSA_32 or |
8183 | R_XTENSA_PLT then do not consider it. This may happen when | |
8184 | the difference of two symbols is used in a literal. */ | |
8185 | if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32 | |
8186 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT)) | |
8187 | continue; | |
8188 | ||
e0001a05 NC |
8189 | /* If the target_offset for this relocation is the same as the |
8190 | previous relocation, then we've already considered whether the | |
8191 | literal can be coalesced. Skip to the next one.... */ | |
43cd72b9 BW |
8192 | if (i != 0 && prev_i != -1 |
8193 | && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset) | |
e0001a05 | 8194 | continue; |
43cd72b9 BW |
8195 | prev_i = i; |
8196 | ||
8197 | if (last_loc_is_prev && | |
8198 | last_target_offset + 4 != rel->r_rel.target_offset) | |
8199 | last_loc_is_prev = FALSE; | |
e0001a05 NC |
8200 | |
8201 | /* Check if the relocation was from an L32R that is being removed | |
8202 | because a CALLX was converted to a direct CALL, and check if | |
8203 | there are no other relocations to the literal. */ | |
99ded152 BW |
8204 | if (is_removable_literal (rel, i, src_relocs, relax_info->src_count, |
8205 | sec, prop_table, ptblsize)) | |
e0001a05 | 8206 | { |
43cd72b9 BW |
8207 | if (!remove_dead_literal (abfd, sec, link_info, internal_relocs, |
8208 | irel, rel, prop_table, ptblsize)) | |
e0001a05 | 8209 | { |
43cd72b9 BW |
8210 | ok = FALSE; |
8211 | goto error_return; | |
e0001a05 | 8212 | } |
43cd72b9 | 8213 | last_target_offset = rel->r_rel.target_offset; |
e0001a05 NC |
8214 | continue; |
8215 | } | |
8216 | ||
43cd72b9 BW |
8217 | if (!identify_literal_placement (abfd, sec, contents, link_info, |
8218 | values, | |
8219 | &last_loc_is_prev, irel, | |
8220 | relax_info->src_count - i, rel, | |
8221 | prop_table, ptblsize, | |
8222 | &target_sec_cache, rel->is_abs_literal)) | |
e0001a05 | 8223 | { |
43cd72b9 BW |
8224 | ok = FALSE; |
8225 | goto error_return; | |
8226 | } | |
8227 | last_target_offset = rel->r_rel.target_offset; | |
8228 | } | |
e0001a05 | 8229 | |
43cd72b9 BW |
8230 | #if DEBUG |
8231 | print_removed_literals (stderr, &relax_info->removed_list); | |
8232 | print_action_list (stderr, &relax_info->action_list); | |
8233 | #endif /* DEBUG */ | |
8234 | ||
8235 | error_return: | |
8236 | if (prop_table) free (prop_table); | |
8237 | clear_section_cache (&target_sec_cache); | |
8238 | ||
8239 | release_contents (sec, contents); | |
8240 | release_internal_relocs (sec, internal_relocs); | |
8241 | return ok; | |
8242 | } | |
8243 | ||
8244 | ||
8245 | static Elf_Internal_Rela * | |
7fa3d080 BW |
8246 | get_irel_at_offset (asection *sec, |
8247 | Elf_Internal_Rela *internal_relocs, | |
8248 | bfd_vma offset) | |
43cd72b9 BW |
8249 | { |
8250 | unsigned i; | |
8251 | Elf_Internal_Rela *irel; | |
8252 | unsigned r_type; | |
8253 | Elf_Internal_Rela key; | |
8254 | ||
8255 | if (!internal_relocs) | |
8256 | return NULL; | |
8257 | ||
8258 | key.r_offset = offset; | |
8259 | irel = bsearch (&key, internal_relocs, sec->reloc_count, | |
8260 | sizeof (Elf_Internal_Rela), internal_reloc_matches); | |
8261 | if (!irel) | |
8262 | return NULL; | |
8263 | ||
8264 | /* bsearch does not guarantee which will be returned if there are | |
8265 | multiple matches. We need the first that is not an alignment. */ | |
8266 | i = irel - internal_relocs; | |
8267 | while (i > 0) | |
8268 | { | |
8269 | if (internal_relocs[i-1].r_offset != offset) | |
8270 | break; | |
8271 | i--; | |
8272 | } | |
8273 | for ( ; i < sec->reloc_count; i++) | |
8274 | { | |
8275 | irel = &internal_relocs[i]; | |
8276 | r_type = ELF32_R_TYPE (irel->r_info); | |
8277 | if (irel->r_offset == offset && r_type != R_XTENSA_NONE) | |
8278 | return irel; | |
8279 | } | |
8280 | ||
8281 | return NULL; | |
8282 | } | |
8283 | ||
8284 | ||
8285 | bfd_boolean | |
7fa3d080 BW |
8286 | is_removable_literal (const source_reloc *rel, |
8287 | int i, | |
8288 | const source_reloc *src_relocs, | |
99ded152 BW |
8289 | int src_count, |
8290 | asection *sec, | |
8291 | property_table_entry *prop_table, | |
8292 | int ptblsize) | |
43cd72b9 BW |
8293 | { |
8294 | const source_reloc *curr_rel; | |
99ded152 BW |
8295 | property_table_entry *entry; |
8296 | ||
43cd72b9 BW |
8297 | if (!rel->is_null) |
8298 | return FALSE; | |
8299 | ||
99ded152 BW |
8300 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, |
8301 | sec->vma + rel->r_rel.target_offset); | |
8302 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) | |
8303 | return FALSE; | |
8304 | ||
43cd72b9 BW |
8305 | for (++i; i < src_count; ++i) |
8306 | { | |
8307 | curr_rel = &src_relocs[i]; | |
8308 | /* If all others have the same target offset.... */ | |
8309 | if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset) | |
8310 | return TRUE; | |
8311 | ||
8312 | if (!curr_rel->is_null | |
8313 | && !xtensa_is_property_section (curr_rel->source_sec) | |
8314 | && !(curr_rel->source_sec->flags & SEC_DEBUGGING)) | |
8315 | return FALSE; | |
8316 | } | |
8317 | return TRUE; | |
8318 | } | |
8319 | ||
8320 | ||
8321 | bfd_boolean | |
7fa3d080 BW |
8322 | remove_dead_literal (bfd *abfd, |
8323 | asection *sec, | |
8324 | struct bfd_link_info *link_info, | |
8325 | Elf_Internal_Rela *internal_relocs, | |
8326 | Elf_Internal_Rela *irel, | |
8327 | source_reloc *rel, | |
8328 | property_table_entry *prop_table, | |
8329 | int ptblsize) | |
43cd72b9 BW |
8330 | { |
8331 | property_table_entry *entry; | |
8332 | xtensa_relax_info *relax_info; | |
8333 | ||
8334 | relax_info = get_xtensa_relax_info (sec); | |
8335 | if (!relax_info) | |
8336 | return FALSE; | |
8337 | ||
8338 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8339 | sec->vma + rel->r_rel.target_offset); | |
8340 | ||
8341 | /* Mark the unused literal so that it will be removed. */ | |
8342 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL); | |
8343 | ||
8344 | text_action_add (&relax_info->action_list, | |
8345 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8346 | ||
8347 | /* If the section is 4-byte aligned, do not add fill. */ | |
8348 | if (sec->alignment_power > 2) | |
8349 | { | |
8350 | int fill_extra_space; | |
8351 | bfd_vma entry_sec_offset; | |
8352 | text_action *fa; | |
8353 | property_table_entry *the_add_entry; | |
8354 | int removed_diff; | |
8355 | ||
8356 | if (entry) | |
8357 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
8358 | else | |
8359 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
8360 | ||
8361 | /* If the literal range is at the end of the section, | |
8362 | do not add fill. */ | |
8363 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8364 | entry_sec_offset); | |
8365 | fill_extra_space = compute_fill_extra_space (the_add_entry); | |
8366 | ||
8367 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8368 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8369 | -4, fill_extra_space); | |
8370 | if (fa) | |
8371 | adjust_fill_action (fa, removed_diff); | |
8372 | else | |
8373 | text_action_add (&relax_info->action_list, | |
8374 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8375 | } | |
8376 | ||
8377 | /* Zero out the relocation on this literal location. */ | |
8378 | if (irel) | |
8379 | { | |
8380 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8381 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8382 | ||
8383 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8384 | pin_internal_relocs (sec, internal_relocs); | |
8385 | } | |
8386 | ||
8387 | /* Do not modify "last_loc_is_prev". */ | |
8388 | return TRUE; | |
8389 | } | |
8390 | ||
8391 | ||
8392 | bfd_boolean | |
7fa3d080 BW |
8393 | identify_literal_placement (bfd *abfd, |
8394 | asection *sec, | |
8395 | bfd_byte *contents, | |
8396 | struct bfd_link_info *link_info, | |
8397 | value_map_hash_table *values, | |
8398 | bfd_boolean *last_loc_is_prev_p, | |
8399 | Elf_Internal_Rela *irel, | |
8400 | int remaining_src_rels, | |
8401 | source_reloc *rel, | |
8402 | property_table_entry *prop_table, | |
8403 | int ptblsize, | |
8404 | section_cache_t *target_sec_cache, | |
8405 | bfd_boolean is_abs_literal) | |
43cd72b9 BW |
8406 | { |
8407 | literal_value val; | |
8408 | value_map *val_map; | |
8409 | xtensa_relax_info *relax_info; | |
8410 | bfd_boolean literal_placed = FALSE; | |
8411 | r_reloc r_rel; | |
8412 | unsigned long value; | |
8413 | bfd_boolean final_static_link; | |
8414 | bfd_size_type sec_size; | |
8415 | ||
8416 | relax_info = get_xtensa_relax_info (sec); | |
8417 | if (!relax_info) | |
8418 | return FALSE; | |
8419 | ||
8420 | sec_size = bfd_get_section_limit (abfd, sec); | |
8421 | ||
8422 | final_static_link = | |
8423 | (!link_info->relocatable | |
8424 | && !elf_hash_table (link_info)->dynamic_sections_created); | |
8425 | ||
8426 | /* The placement algorithm first checks to see if the literal is | |
8427 | already in the value map. If so and the value map is reachable | |
8428 | from all uses, then the literal is moved to that location. If | |
8429 | not, then we identify the last location where a fresh literal was | |
8430 | placed. If the literal can be safely moved there, then we do so. | |
8431 | If not, then we assume that the literal is not to move and leave | |
8432 | the literal where it is, marking it as the last literal | |
8433 | location. */ | |
8434 | ||
8435 | /* Find the literal value. */ | |
8436 | value = 0; | |
8437 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8438 | if (!irel) | |
8439 | { | |
8440 | BFD_ASSERT (rel->r_rel.target_offset < sec_size); | |
8441 | value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset); | |
8442 | } | |
8443 | init_literal_value (&val, &r_rel, value, is_abs_literal); | |
8444 | ||
8445 | /* Check if we've seen another literal with the same value that | |
8446 | is in the same output section. */ | |
8447 | val_map = value_map_get_cached_value (values, &val, final_static_link); | |
8448 | ||
8449 | if (val_map | |
8450 | && (r_reloc_get_section (&val_map->loc)->output_section | |
8451 | == sec->output_section) | |
8452 | && relocations_reach (rel, remaining_src_rels, &val_map->loc) | |
8453 | && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map)) | |
8454 | { | |
8455 | /* No change to last_loc_is_prev. */ | |
8456 | literal_placed = TRUE; | |
8457 | } | |
8458 | ||
8459 | /* For relocatable links, do not try to move literals. To do it | |
8460 | correctly might increase the number of relocations in an input | |
8461 | section making the default relocatable linking fail. */ | |
8462 | if (!link_info->relocatable && !literal_placed | |
8463 | && values->has_last_loc && !(*last_loc_is_prev_p)) | |
8464 | { | |
8465 | asection *target_sec = r_reloc_get_section (&values->last_loc); | |
8466 | if (target_sec && target_sec->output_section == sec->output_section) | |
8467 | { | |
8468 | /* Increment the virtual offset. */ | |
8469 | r_reloc try_loc = values->last_loc; | |
8470 | try_loc.virtual_offset += 4; | |
8471 | ||
8472 | /* There is a last loc that was in the same output section. */ | |
8473 | if (relocations_reach (rel, remaining_src_rels, &try_loc) | |
8474 | && move_shared_literal (sec, link_info, rel, | |
8475 | prop_table, ptblsize, | |
8476 | &try_loc, &val, target_sec_cache)) | |
e0001a05 | 8477 | { |
43cd72b9 BW |
8478 | values->last_loc.virtual_offset += 4; |
8479 | literal_placed = TRUE; | |
8480 | if (!val_map) | |
8481 | val_map = add_value_map (values, &val, &try_loc, | |
8482 | final_static_link); | |
8483 | else | |
8484 | val_map->loc = try_loc; | |
e0001a05 NC |
8485 | } |
8486 | } | |
43cd72b9 BW |
8487 | } |
8488 | ||
8489 | if (!literal_placed) | |
8490 | { | |
8491 | /* Nothing worked, leave the literal alone but update the last loc. */ | |
8492 | values->has_last_loc = TRUE; | |
8493 | values->last_loc = rel->r_rel; | |
8494 | if (!val_map) | |
8495 | val_map = add_value_map (values, &val, &rel->r_rel, final_static_link); | |
e0001a05 | 8496 | else |
43cd72b9 BW |
8497 | val_map->loc = rel->r_rel; |
8498 | *last_loc_is_prev_p = TRUE; | |
e0001a05 NC |
8499 | } |
8500 | ||
43cd72b9 | 8501 | return TRUE; |
e0001a05 NC |
8502 | } |
8503 | ||
8504 | ||
8505 | /* Check if the original relocations (presumably on L32R instructions) | |
8506 | identified by reloc[0..N] can be changed to reference the literal | |
8507 | identified by r_rel. If r_rel is out of range for any of the | |
8508 | original relocations, then we don't want to coalesce the original | |
8509 | literal with the one at r_rel. We only check reloc[0..N], where the | |
8510 | offsets are all the same as for reloc[0] (i.e., they're all | |
8511 | referencing the same literal) and where N is also bounded by the | |
8512 | number of remaining entries in the "reloc" array. The "reloc" array | |
8513 | is sorted by target offset so we know all the entries for the same | |
8514 | literal will be contiguous. */ | |
8515 | ||
8516 | static bfd_boolean | |
7fa3d080 BW |
8517 | relocations_reach (source_reloc *reloc, |
8518 | int remaining_relocs, | |
8519 | const r_reloc *r_rel) | |
e0001a05 NC |
8520 | { |
8521 | bfd_vma from_offset, source_address, dest_address; | |
8522 | asection *sec; | |
8523 | int i; | |
8524 | ||
8525 | if (!r_reloc_is_defined (r_rel)) | |
8526 | return FALSE; | |
8527 | ||
8528 | sec = r_reloc_get_section (r_rel); | |
8529 | from_offset = reloc[0].r_rel.target_offset; | |
8530 | ||
8531 | for (i = 0; i < remaining_relocs; i++) | |
8532 | { | |
8533 | if (reloc[i].r_rel.target_offset != from_offset) | |
8534 | break; | |
8535 | ||
8536 | /* Ignore relocations that have been removed. */ | |
8537 | if (reloc[i].is_null) | |
8538 | continue; | |
8539 | ||
8540 | /* The original and new output section for these must be the same | |
8541 | in order to coalesce. */ | |
8542 | if (r_reloc_get_section (&reloc[i].r_rel)->output_section | |
8543 | != sec->output_section) | |
8544 | return FALSE; | |
8545 | ||
d638e0ac BW |
8546 | /* Absolute literals in the same output section can always be |
8547 | combined. */ | |
8548 | if (reloc[i].is_abs_literal) | |
8549 | continue; | |
8550 | ||
43cd72b9 BW |
8551 | /* A literal with no PC-relative relocations can be moved anywhere. */ |
8552 | if (reloc[i].opnd != -1) | |
e0001a05 NC |
8553 | { |
8554 | /* Otherwise, check to see that it fits. */ | |
8555 | source_address = (reloc[i].source_sec->output_section->vma | |
8556 | + reloc[i].source_sec->output_offset | |
8557 | + reloc[i].r_rel.rela.r_offset); | |
8558 | dest_address = (sec->output_section->vma | |
8559 | + sec->output_offset | |
8560 | + r_rel->target_offset); | |
8561 | ||
43cd72b9 BW |
8562 | if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd, |
8563 | source_address, dest_address)) | |
e0001a05 NC |
8564 | return FALSE; |
8565 | } | |
8566 | } | |
8567 | ||
8568 | return TRUE; | |
8569 | } | |
8570 | ||
8571 | ||
43cd72b9 BW |
8572 | /* Move a literal to another literal location because it is |
8573 | the same as the other literal value. */ | |
e0001a05 | 8574 | |
43cd72b9 | 8575 | static bfd_boolean |
7fa3d080 BW |
8576 | coalesce_shared_literal (asection *sec, |
8577 | source_reloc *rel, | |
8578 | property_table_entry *prop_table, | |
8579 | int ptblsize, | |
8580 | value_map *val_map) | |
e0001a05 | 8581 | { |
43cd72b9 BW |
8582 | property_table_entry *entry; |
8583 | text_action *fa; | |
8584 | property_table_entry *the_add_entry; | |
8585 | int removed_diff; | |
8586 | xtensa_relax_info *relax_info; | |
8587 | ||
8588 | relax_info = get_xtensa_relax_info (sec); | |
8589 | if (!relax_info) | |
8590 | return FALSE; | |
8591 | ||
8592 | entry = elf_xtensa_find_property_entry | |
8593 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
99ded152 | 8594 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) |
43cd72b9 BW |
8595 | return TRUE; |
8596 | ||
8597 | /* Mark that the literal will be coalesced. */ | |
8598 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc); | |
8599 | ||
8600 | text_action_add (&relax_info->action_list, | |
8601 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8602 | ||
8603 | /* If the section is 4-byte aligned, do not add fill. */ | |
8604 | if (sec->alignment_power > 2) | |
e0001a05 | 8605 | { |
43cd72b9 BW |
8606 | int fill_extra_space; |
8607 | bfd_vma entry_sec_offset; | |
8608 | ||
8609 | if (entry) | |
8610 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
8611 | else | |
8612 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
8613 | ||
8614 | /* If the literal range is at the end of the section, | |
8615 | do not add fill. */ | |
8616 | fill_extra_space = 0; | |
8617 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8618 | entry_sec_offset); | |
8619 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8620 | fill_extra_space = the_add_entry->size; | |
8621 | ||
8622 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8623 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8624 | -4, fill_extra_space); | |
8625 | if (fa) | |
8626 | adjust_fill_action (fa, removed_diff); | |
8627 | else | |
8628 | text_action_add (&relax_info->action_list, | |
8629 | ta_fill, sec, entry_sec_offset, removed_diff); | |
e0001a05 | 8630 | } |
43cd72b9 BW |
8631 | |
8632 | return TRUE; | |
8633 | } | |
8634 | ||
8635 | ||
8636 | /* Move a literal to another location. This may actually increase the | |
8637 | total amount of space used because of alignments so we need to do | |
8638 | this carefully. Also, it may make a branch go out of range. */ | |
8639 | ||
8640 | static bfd_boolean | |
7fa3d080 BW |
8641 | move_shared_literal (asection *sec, |
8642 | struct bfd_link_info *link_info, | |
8643 | source_reloc *rel, | |
8644 | property_table_entry *prop_table, | |
8645 | int ptblsize, | |
8646 | const r_reloc *target_loc, | |
8647 | const literal_value *lit_value, | |
8648 | section_cache_t *target_sec_cache) | |
43cd72b9 BW |
8649 | { |
8650 | property_table_entry *the_add_entry, *src_entry, *target_entry = NULL; | |
8651 | text_action *fa, *target_fa; | |
8652 | int removed_diff; | |
8653 | xtensa_relax_info *relax_info, *target_relax_info; | |
8654 | asection *target_sec; | |
8655 | ebb_t *ebb; | |
8656 | ebb_constraint ebb_table; | |
8657 | bfd_boolean relocs_fit; | |
8658 | ||
8659 | /* If this routine always returns FALSE, the literals that cannot be | |
8660 | coalesced will not be moved. */ | |
8661 | if (elf32xtensa_no_literal_movement) | |
8662 | return FALSE; | |
8663 | ||
8664 | relax_info = get_xtensa_relax_info (sec); | |
8665 | if (!relax_info) | |
8666 | return FALSE; | |
8667 | ||
8668 | target_sec = r_reloc_get_section (target_loc); | |
8669 | target_relax_info = get_xtensa_relax_info (target_sec); | |
8670 | ||
8671 | /* Literals to undefined sections may not be moved because they | |
8672 | must report an error. */ | |
8673 | if (bfd_is_und_section (target_sec)) | |
8674 | return FALSE; | |
8675 | ||
8676 | src_entry = elf_xtensa_find_property_entry | |
8677 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
8678 | ||
8679 | if (!section_cache_section (target_sec_cache, target_sec, link_info)) | |
8680 | return FALSE; | |
8681 | ||
8682 | target_entry = elf_xtensa_find_property_entry | |
8683 | (target_sec_cache->ptbl, target_sec_cache->pte_count, | |
8684 | target_sec->vma + target_loc->target_offset); | |
8685 | ||
8686 | if (!target_entry) | |
8687 | return FALSE; | |
8688 | ||
8689 | /* Make sure that we have not broken any branches. */ | |
8690 | relocs_fit = FALSE; | |
8691 | ||
8692 | init_ebb_constraint (&ebb_table); | |
8693 | ebb = &ebb_table.ebb; | |
8694 | init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents, | |
8695 | target_sec_cache->content_length, | |
8696 | target_sec_cache->ptbl, target_sec_cache->pte_count, | |
8697 | target_sec_cache->relocs, target_sec_cache->reloc_count); | |
8698 | ||
8699 | /* Propose to add 4 bytes + worst-case alignment size increase to | |
8700 | destination. */ | |
8701 | ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0, | |
8702 | ta_fill, target_loc->target_offset, | |
8703 | -4 - (1 << target_sec->alignment_power), TRUE); | |
8704 | ||
8705 | /* Check all of the PC-relative relocations to make sure they still fit. */ | |
8706 | relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec, | |
8707 | target_sec_cache->contents, | |
8708 | target_sec_cache->relocs, | |
cb337148 | 8709 | &ebb_table, NULL); |
43cd72b9 BW |
8710 | |
8711 | if (!relocs_fit) | |
8712 | return FALSE; | |
8713 | ||
8714 | text_action_add_literal (&target_relax_info->action_list, | |
8715 | ta_add_literal, target_loc, lit_value, -4); | |
8716 | ||
8717 | if (target_sec->alignment_power > 2 && target_entry != src_entry) | |
8718 | { | |
8719 | /* May need to add or remove some fill to maintain alignment. */ | |
8720 | int fill_extra_space; | |
8721 | bfd_vma entry_sec_offset; | |
8722 | ||
8723 | entry_sec_offset = | |
8724 | target_entry->address - target_sec->vma + target_entry->size; | |
8725 | ||
8726 | /* If the literal range is at the end of the section, | |
8727 | do not add fill. */ | |
8728 | fill_extra_space = 0; | |
8729 | the_add_entry = | |
8730 | elf_xtensa_find_property_entry (target_sec_cache->ptbl, | |
8731 | target_sec_cache->pte_count, | |
8732 | entry_sec_offset); | |
8733 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8734 | fill_extra_space = the_add_entry->size; | |
8735 | ||
8736 | target_fa = find_fill_action (&target_relax_info->action_list, | |
8737 | target_sec, entry_sec_offset); | |
8738 | removed_diff = compute_removed_action_diff (target_fa, target_sec, | |
8739 | entry_sec_offset, 4, | |
8740 | fill_extra_space); | |
8741 | if (target_fa) | |
8742 | adjust_fill_action (target_fa, removed_diff); | |
8743 | else | |
8744 | text_action_add (&target_relax_info->action_list, | |
8745 | ta_fill, target_sec, entry_sec_offset, removed_diff); | |
8746 | } | |
8747 | ||
8748 | /* Mark that the literal will be moved to the new location. */ | |
8749 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc); | |
8750 | ||
8751 | /* Remove the literal. */ | |
8752 | text_action_add (&relax_info->action_list, | |
8753 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8754 | ||
8755 | /* If the section is 4-byte aligned, do not add fill. */ | |
8756 | if (sec->alignment_power > 2 && target_entry != src_entry) | |
8757 | { | |
8758 | int fill_extra_space; | |
8759 | bfd_vma entry_sec_offset; | |
8760 | ||
8761 | if (src_entry) | |
8762 | entry_sec_offset = src_entry->address - sec->vma + src_entry->size; | |
8763 | else | |
8764 | entry_sec_offset = rel->r_rel.target_offset+4; | |
8765 | ||
8766 | /* If the literal range is at the end of the section, | |
8767 | do not add fill. */ | |
8768 | fill_extra_space = 0; | |
8769 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8770 | entry_sec_offset); | |
8771 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8772 | fill_extra_space = the_add_entry->size; | |
8773 | ||
8774 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8775 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8776 | -4, fill_extra_space); | |
8777 | if (fa) | |
8778 | adjust_fill_action (fa, removed_diff); | |
8779 | else | |
8780 | text_action_add (&relax_info->action_list, | |
8781 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8782 | } | |
8783 | ||
8784 | return TRUE; | |
e0001a05 NC |
8785 | } |
8786 | ||
8787 | \f | |
8788 | /* Second relaxation pass. */ | |
8789 | ||
8790 | /* Modify all of the relocations to point to the right spot, and if this | |
8791 | is a relaxable section, delete the unwanted literals and fix the | |
43cd72b9 | 8792 | section size. */ |
e0001a05 | 8793 | |
43cd72b9 | 8794 | bfd_boolean |
7fa3d080 | 8795 | relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info) |
e0001a05 NC |
8796 | { |
8797 | Elf_Internal_Rela *internal_relocs; | |
8798 | xtensa_relax_info *relax_info; | |
8799 | bfd_byte *contents; | |
8800 | bfd_boolean ok = TRUE; | |
8801 | unsigned i; | |
43cd72b9 BW |
8802 | bfd_boolean rv = FALSE; |
8803 | bfd_boolean virtual_action; | |
8804 | bfd_size_type sec_size; | |
e0001a05 | 8805 | |
43cd72b9 | 8806 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8807 | relax_info = get_xtensa_relax_info (sec); |
8808 | BFD_ASSERT (relax_info); | |
8809 | ||
43cd72b9 BW |
8810 | /* First translate any of the fixes that have been added already. */ |
8811 | translate_section_fixes (sec); | |
8812 | ||
e0001a05 NC |
8813 | /* Handle property sections (e.g., literal tables) specially. */ |
8814 | if (xtensa_is_property_section (sec)) | |
8815 | { | |
8816 | BFD_ASSERT (!relax_info->is_relaxable_literal_section); | |
8817 | return relax_property_section (abfd, sec, link_info); | |
8818 | } | |
8819 | ||
43cd72b9 BW |
8820 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8821 | link_info->keep_memory); | |
8822 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
8823 | if (contents == NULL && sec_size != 0) | |
8824 | { | |
8825 | ok = FALSE; | |
8826 | goto error_return; | |
8827 | } | |
8828 | ||
8829 | if (internal_relocs) | |
8830 | { | |
8831 | for (i = 0; i < sec->reloc_count; i++) | |
8832 | { | |
8833 | Elf_Internal_Rela *irel; | |
8834 | xtensa_relax_info *target_relax_info; | |
8835 | bfd_vma source_offset, old_source_offset; | |
8836 | r_reloc r_rel; | |
8837 | unsigned r_type; | |
8838 | asection *target_sec; | |
8839 | ||
8840 | /* Locally change the source address. | |
8841 | Translate the target to the new target address. | |
8842 | If it points to this section and has been removed, | |
8843 | NULLify it. | |
8844 | Write it back. */ | |
8845 | ||
8846 | irel = &internal_relocs[i]; | |
8847 | source_offset = irel->r_offset; | |
8848 | old_source_offset = source_offset; | |
8849 | ||
8850 | r_type = ELF32_R_TYPE (irel->r_info); | |
8851 | r_reloc_init (&r_rel, abfd, irel, contents, | |
8852 | bfd_get_section_limit (abfd, sec)); | |
8853 | ||
8854 | /* If this section could have changed then we may need to | |
8855 | change the relocation's offset. */ | |
8856 | ||
8857 | if (relax_info->is_relaxable_literal_section | |
8858 | || relax_info->is_relaxable_asm_section) | |
8859 | { | |
9b7f5d20 BW |
8860 | pin_internal_relocs (sec, internal_relocs); |
8861 | ||
43cd72b9 BW |
8862 | if (r_type != R_XTENSA_NONE |
8863 | && find_removed_literal (&relax_info->removed_list, | |
8864 | irel->r_offset)) | |
8865 | { | |
8866 | /* Remove this relocation. */ | |
8867 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8868 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8869 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8870 | irel->r_offset = offset_with_removed_text | |
8871 | (&relax_info->action_list, irel->r_offset); | |
43cd72b9 BW |
8872 | continue; |
8873 | } | |
8874 | ||
8875 | if (r_type == R_XTENSA_ASM_SIMPLIFY) | |
8876 | { | |
8877 | text_action *action = | |
8878 | find_insn_action (&relax_info->action_list, | |
8879 | irel->r_offset); | |
8880 | if (action && (action->action == ta_convert_longcall | |
8881 | || action->action == ta_remove_longcall)) | |
8882 | { | |
8883 | bfd_reloc_status_type retval; | |
8884 | char *error_message = NULL; | |
8885 | ||
8886 | retval = contract_asm_expansion (contents, sec_size, | |
8887 | irel, &error_message); | |
8888 | if (retval != bfd_reloc_ok) | |
8889 | { | |
8890 | (*link_info->callbacks->reloc_dangerous) | |
8891 | (link_info, error_message, abfd, sec, | |
8892 | irel->r_offset); | |
8893 | goto error_return; | |
8894 | } | |
8895 | /* Update the action so that the code that moves | |
8896 | the contents will do the right thing. */ | |
8897 | if (action->action == ta_remove_longcall) | |
8898 | action->action = ta_remove_insn; | |
8899 | else | |
8900 | action->action = ta_none; | |
8901 | /* Refresh the info in the r_rel. */ | |
8902 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8903 | r_type = ELF32_R_TYPE (irel->r_info); | |
8904 | } | |
8905 | } | |
8906 | ||
8907 | source_offset = offset_with_removed_text | |
8908 | (&relax_info->action_list, irel->r_offset); | |
8909 | irel->r_offset = source_offset; | |
8910 | } | |
8911 | ||
8912 | /* If the target section could have changed then | |
8913 | we may need to change the relocation's target offset. */ | |
8914 | ||
8915 | target_sec = r_reloc_get_section (&r_rel); | |
43cd72b9 | 8916 | |
ae326da8 BW |
8917 | /* For a reference to a discarded section from a DWARF section, |
8918 | i.e., where action_discarded is PRETEND, the symbol will | |
8919 | eventually be modified to refer to the kept section (at least if | |
8920 | the kept and discarded sections are the same size). Anticipate | |
8921 | that here and adjust things accordingly. */ | |
8922 | if (! elf_xtensa_ignore_discarded_relocs (sec) | |
8923 | && elf_xtensa_action_discarded (sec) == PRETEND | |
8924 | && sec->sec_info_type != ELF_INFO_TYPE_STABS | |
8925 | && target_sec != NULL | |
8926 | && elf_discarded_section (target_sec)) | |
8927 | { | |
8928 | /* It would be natural to call _bfd_elf_check_kept_section | |
8929 | here, but it's not exported from elflink.c. It's also a | |
8930 | fairly expensive check. Adjusting the relocations to the | |
8931 | discarded section is fairly harmless; it will only adjust | |
8932 | some addends and difference values. If it turns out that | |
8933 | _bfd_elf_check_kept_section fails later, it won't matter, | |
8934 | so just compare the section names to find the right group | |
8935 | member. */ | |
8936 | asection *kept = target_sec->kept_section; | |
8937 | if (kept != NULL) | |
8938 | { | |
8939 | if ((kept->flags & SEC_GROUP) != 0) | |
8940 | { | |
8941 | asection *first = elf_next_in_group (kept); | |
8942 | asection *s = first; | |
8943 | ||
8944 | kept = NULL; | |
8945 | while (s != NULL) | |
8946 | { | |
8947 | if (strcmp (s->name, target_sec->name) == 0) | |
8948 | { | |
8949 | kept = s; | |
8950 | break; | |
8951 | } | |
8952 | s = elf_next_in_group (s); | |
8953 | if (s == first) | |
8954 | break; | |
8955 | } | |
8956 | } | |
8957 | } | |
8958 | if (kept != NULL | |
8959 | && ((target_sec->rawsize != 0 | |
8960 | ? target_sec->rawsize : target_sec->size) | |
8961 | == (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
8962 | target_sec = kept; | |
8963 | } | |
8964 | ||
8965 | target_relax_info = get_xtensa_relax_info (target_sec); | |
43cd72b9 BW |
8966 | if (target_relax_info |
8967 | && (target_relax_info->is_relaxable_literal_section | |
8968 | || target_relax_info->is_relaxable_asm_section)) | |
8969 | { | |
8970 | r_reloc new_reloc; | |
9b7f5d20 | 8971 | target_sec = translate_reloc (&r_rel, &new_reloc, target_sec); |
43cd72b9 BW |
8972 | |
8973 | if (r_type == R_XTENSA_DIFF8 | |
8974 | || r_type == R_XTENSA_DIFF16 | |
8975 | || r_type == R_XTENSA_DIFF32) | |
8976 | { | |
8977 | bfd_vma diff_value = 0, new_end_offset, diff_mask = 0; | |
8978 | ||
8979 | if (bfd_get_section_limit (abfd, sec) < old_source_offset) | |
8980 | { | |
8981 | (*link_info->callbacks->reloc_dangerous) | |
8982 | (link_info, _("invalid relocation address"), | |
8983 | abfd, sec, old_source_offset); | |
8984 | goto error_return; | |
8985 | } | |
8986 | ||
8987 | switch (r_type) | |
8988 | { | |
8989 | case R_XTENSA_DIFF8: | |
8990 | diff_value = | |
8991 | bfd_get_8 (abfd, &contents[old_source_offset]); | |
8992 | break; | |
8993 | case R_XTENSA_DIFF16: | |
8994 | diff_value = | |
8995 | bfd_get_16 (abfd, &contents[old_source_offset]); | |
8996 | break; | |
8997 | case R_XTENSA_DIFF32: | |
8998 | diff_value = | |
8999 | bfd_get_32 (abfd, &contents[old_source_offset]); | |
9000 | break; | |
9001 | } | |
9002 | ||
9003 | new_end_offset = offset_with_removed_text | |
9004 | (&target_relax_info->action_list, | |
9005 | r_rel.target_offset + diff_value); | |
9006 | diff_value = new_end_offset - new_reloc.target_offset; | |
9007 | ||
9008 | switch (r_type) | |
9009 | { | |
9010 | case R_XTENSA_DIFF8: | |
9011 | diff_mask = 0xff; | |
9012 | bfd_put_8 (abfd, diff_value, | |
9013 | &contents[old_source_offset]); | |
9014 | break; | |
9015 | case R_XTENSA_DIFF16: | |
9016 | diff_mask = 0xffff; | |
9017 | bfd_put_16 (abfd, diff_value, | |
9018 | &contents[old_source_offset]); | |
9019 | break; | |
9020 | case R_XTENSA_DIFF32: | |
9021 | diff_mask = 0xffffffff; | |
9022 | bfd_put_32 (abfd, diff_value, | |
9023 | &contents[old_source_offset]); | |
9024 | break; | |
9025 | } | |
9026 | ||
9027 | /* Check for overflow. */ | |
9028 | if ((diff_value & ~diff_mask) != 0) | |
9029 | { | |
9030 | (*link_info->callbacks->reloc_dangerous) | |
9031 | (link_info, _("overflow after relaxation"), | |
9032 | abfd, sec, old_source_offset); | |
9033 | goto error_return; | |
9034 | } | |
9035 | ||
9036 | pin_contents (sec, contents); | |
9037 | } | |
dc96b90a BW |
9038 | |
9039 | /* If the relocation still references a section in the same | |
9040 | input file, modify the relocation directly instead of | |
9041 | adding a "fix" record. */ | |
9042 | if (target_sec->owner == abfd) | |
9043 | { | |
9044 | unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info); | |
9045 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
9046 | irel->r_addend = new_reloc.rela.r_addend; | |
9047 | pin_internal_relocs (sec, internal_relocs); | |
9048 | } | |
9b7f5d20 BW |
9049 | else |
9050 | { | |
dc96b90a BW |
9051 | bfd_vma addend_displacement; |
9052 | reloc_bfd_fix *fix; | |
9053 | ||
9054 | addend_displacement = | |
9055 | new_reloc.target_offset + new_reloc.virtual_offset; | |
9056 | fix = reloc_bfd_fix_init (sec, source_offset, r_type, | |
9057 | target_sec, | |
9058 | addend_displacement, TRUE); | |
9059 | add_fix (sec, fix); | |
9b7f5d20 | 9060 | } |
43cd72b9 | 9061 | } |
43cd72b9 BW |
9062 | } |
9063 | } | |
9064 | ||
9065 | if ((relax_info->is_relaxable_literal_section | |
9066 | || relax_info->is_relaxable_asm_section) | |
9067 | && relax_info->action_list.head) | |
9068 | { | |
9069 | /* Walk through the planned actions and build up a table | |
9070 | of move, copy and fill records. Use the move, copy and | |
9071 | fill records to perform the actions once. */ | |
9072 | ||
43cd72b9 BW |
9073 | int removed = 0; |
9074 | bfd_size_type final_size, copy_size, orig_insn_size; | |
9075 | bfd_byte *scratch = NULL; | |
9076 | bfd_byte *dup_contents = NULL; | |
a3ef2d63 | 9077 | bfd_size_type orig_size = sec->size; |
43cd72b9 BW |
9078 | bfd_vma orig_dot = 0; |
9079 | bfd_vma orig_dot_copied = 0; /* Byte copied already from | |
9080 | orig dot in physical memory. */ | |
9081 | bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */ | |
9082 | bfd_vma dup_dot = 0; | |
9083 | ||
9084 | text_action *action = relax_info->action_list.head; | |
9085 | ||
9086 | final_size = sec->size; | |
9087 | for (action = relax_info->action_list.head; action; | |
9088 | action = action->next) | |
9089 | { | |
9090 | final_size -= action->removed_bytes; | |
9091 | } | |
9092 | ||
9093 | scratch = (bfd_byte *) bfd_zmalloc (final_size); | |
9094 | dup_contents = (bfd_byte *) bfd_zmalloc (final_size); | |
9095 | ||
9096 | /* The dot is the current fill location. */ | |
9097 | #if DEBUG | |
9098 | print_action_list (stderr, &relax_info->action_list); | |
9099 | #endif | |
9100 | ||
9101 | for (action = relax_info->action_list.head; action; | |
9102 | action = action->next) | |
9103 | { | |
9104 | virtual_action = FALSE; | |
9105 | if (action->offset > orig_dot) | |
9106 | { | |
9107 | orig_dot += orig_dot_copied; | |
9108 | orig_dot_copied = 0; | |
9109 | orig_dot_vo = 0; | |
9110 | /* Out of the virtual world. */ | |
9111 | } | |
9112 | ||
9113 | if (action->offset > orig_dot) | |
9114 | { | |
9115 | copy_size = action->offset - orig_dot; | |
9116 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9117 | orig_dot += copy_size; | |
9118 | dup_dot += copy_size; | |
9119 | BFD_ASSERT (action->offset == orig_dot); | |
9120 | } | |
9121 | else if (action->offset < orig_dot) | |
9122 | { | |
9123 | if (action->action == ta_fill | |
9124 | && action->offset - action->removed_bytes == orig_dot) | |
9125 | { | |
9126 | /* This is OK because the fill only effects the dup_dot. */ | |
9127 | } | |
9128 | else if (action->action == ta_add_literal) | |
9129 | { | |
9130 | /* TBD. Might need to handle this. */ | |
9131 | } | |
9132 | } | |
9133 | if (action->offset == orig_dot) | |
9134 | { | |
9135 | if (action->virtual_offset > orig_dot_vo) | |
9136 | { | |
9137 | if (orig_dot_vo == 0) | |
9138 | { | |
9139 | /* Need to copy virtual_offset bytes. Probably four. */ | |
9140 | copy_size = action->virtual_offset - orig_dot_vo; | |
9141 | memmove (&dup_contents[dup_dot], | |
9142 | &contents[orig_dot], copy_size); | |
9143 | orig_dot_copied = copy_size; | |
9144 | dup_dot += copy_size; | |
9145 | } | |
9146 | virtual_action = TRUE; | |
9147 | } | |
9148 | else | |
9149 | BFD_ASSERT (action->virtual_offset <= orig_dot_vo); | |
9150 | } | |
9151 | switch (action->action) | |
9152 | { | |
9153 | case ta_remove_literal: | |
9154 | case ta_remove_insn: | |
9155 | BFD_ASSERT (action->removed_bytes >= 0); | |
9156 | orig_dot += action->removed_bytes; | |
9157 | break; | |
9158 | ||
9159 | case ta_narrow_insn: | |
9160 | orig_insn_size = 3; | |
9161 | copy_size = 2; | |
9162 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9163 | BFD_ASSERT (action->removed_bytes == 1); | |
64b607e6 | 9164 | rv = narrow_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9165 | BFD_ASSERT (rv); |
9166 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9167 | orig_dot += orig_insn_size; | |
9168 | dup_dot += copy_size; | |
9169 | break; | |
9170 | ||
9171 | case ta_fill: | |
9172 | if (action->removed_bytes >= 0) | |
9173 | orig_dot += action->removed_bytes; | |
9174 | else | |
9175 | { | |
9176 | /* Already zeroed in dup_contents. Just bump the | |
9177 | counters. */ | |
9178 | dup_dot += (-action->removed_bytes); | |
9179 | } | |
9180 | break; | |
9181 | ||
9182 | case ta_none: | |
9183 | BFD_ASSERT (action->removed_bytes == 0); | |
9184 | break; | |
9185 | ||
9186 | case ta_convert_longcall: | |
9187 | case ta_remove_longcall: | |
9188 | /* These will be removed or converted before we get here. */ | |
9189 | BFD_ASSERT (0); | |
9190 | break; | |
9191 | ||
9192 | case ta_widen_insn: | |
9193 | orig_insn_size = 2; | |
9194 | copy_size = 3; | |
9195 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9196 | BFD_ASSERT (action->removed_bytes == -1); | |
64b607e6 | 9197 | rv = widen_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9198 | BFD_ASSERT (rv); |
9199 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9200 | orig_dot += orig_insn_size; | |
9201 | dup_dot += copy_size; | |
9202 | break; | |
9203 | ||
9204 | case ta_add_literal: | |
9205 | orig_insn_size = 0; | |
9206 | copy_size = 4; | |
9207 | BFD_ASSERT (action->removed_bytes == -4); | |
9208 | /* TBD -- place the literal value here and insert | |
9209 | into the table. */ | |
9210 | memset (&dup_contents[dup_dot], 0, 4); | |
9211 | pin_internal_relocs (sec, internal_relocs); | |
9212 | pin_contents (sec, contents); | |
9213 | ||
9214 | if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents, | |
9215 | relax_info, &internal_relocs, &action->value)) | |
9216 | goto error_return; | |
9217 | ||
9218 | if (virtual_action) | |
9219 | orig_dot_vo += copy_size; | |
9220 | ||
9221 | orig_dot += orig_insn_size; | |
9222 | dup_dot += copy_size; | |
9223 | break; | |
9224 | ||
9225 | default: | |
9226 | /* Not implemented yet. */ | |
9227 | BFD_ASSERT (0); | |
9228 | break; | |
9229 | } | |
9230 | ||
43cd72b9 BW |
9231 | removed += action->removed_bytes; |
9232 | BFD_ASSERT (dup_dot <= final_size); | |
9233 | BFD_ASSERT (orig_dot <= orig_size); | |
9234 | } | |
9235 | ||
9236 | orig_dot += orig_dot_copied; | |
9237 | orig_dot_copied = 0; | |
9238 | ||
9239 | if (orig_dot != orig_size) | |
9240 | { | |
9241 | copy_size = orig_size - orig_dot; | |
9242 | BFD_ASSERT (orig_size > orig_dot); | |
9243 | BFD_ASSERT (dup_dot + copy_size == final_size); | |
9244 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9245 | orig_dot += copy_size; | |
9246 | dup_dot += copy_size; | |
9247 | } | |
9248 | BFD_ASSERT (orig_size == orig_dot); | |
9249 | BFD_ASSERT (final_size == dup_dot); | |
9250 | ||
9251 | /* Move the dup_contents back. */ | |
9252 | if (final_size > orig_size) | |
9253 | { | |
9254 | /* Contents need to be reallocated. Swap the dup_contents into | |
9255 | contents. */ | |
9256 | sec->contents = dup_contents; | |
9257 | free (contents); | |
9258 | contents = dup_contents; | |
9259 | pin_contents (sec, contents); | |
9260 | } | |
9261 | else | |
9262 | { | |
9263 | BFD_ASSERT (final_size <= orig_size); | |
9264 | memset (contents, 0, orig_size); | |
9265 | memcpy (contents, dup_contents, final_size); | |
9266 | free (dup_contents); | |
9267 | } | |
9268 | free (scratch); | |
9269 | pin_contents (sec, contents); | |
9270 | ||
a3ef2d63 BW |
9271 | if (sec->rawsize == 0) |
9272 | sec->rawsize = sec->size; | |
43cd72b9 BW |
9273 | sec->size = final_size; |
9274 | } | |
9275 | ||
9276 | error_return: | |
9277 | release_internal_relocs (sec, internal_relocs); | |
9278 | release_contents (sec, contents); | |
9279 | return ok; | |
9280 | } | |
9281 | ||
9282 | ||
9283 | static bfd_boolean | |
7fa3d080 | 9284 | translate_section_fixes (asection *sec) |
43cd72b9 BW |
9285 | { |
9286 | xtensa_relax_info *relax_info; | |
9287 | reloc_bfd_fix *r; | |
9288 | ||
9289 | relax_info = get_xtensa_relax_info (sec); | |
9290 | if (!relax_info) | |
9291 | return TRUE; | |
9292 | ||
9293 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
9294 | if (!translate_reloc_bfd_fix (r)) | |
9295 | return FALSE; | |
e0001a05 | 9296 | |
43cd72b9 BW |
9297 | return TRUE; |
9298 | } | |
e0001a05 | 9299 | |
e0001a05 | 9300 | |
43cd72b9 BW |
9301 | /* Translate a fix given the mapping in the relax info for the target |
9302 | section. If it has already been translated, no work is required. */ | |
e0001a05 | 9303 | |
43cd72b9 | 9304 | static bfd_boolean |
7fa3d080 | 9305 | translate_reloc_bfd_fix (reloc_bfd_fix *fix) |
43cd72b9 BW |
9306 | { |
9307 | reloc_bfd_fix new_fix; | |
9308 | asection *sec; | |
9309 | xtensa_relax_info *relax_info; | |
9310 | removed_literal *removed; | |
9311 | bfd_vma new_offset, target_offset; | |
e0001a05 | 9312 | |
43cd72b9 BW |
9313 | if (fix->translated) |
9314 | return TRUE; | |
e0001a05 | 9315 | |
43cd72b9 BW |
9316 | sec = fix->target_sec; |
9317 | target_offset = fix->target_offset; | |
e0001a05 | 9318 | |
43cd72b9 BW |
9319 | relax_info = get_xtensa_relax_info (sec); |
9320 | if (!relax_info) | |
9321 | { | |
9322 | fix->translated = TRUE; | |
9323 | return TRUE; | |
9324 | } | |
e0001a05 | 9325 | |
43cd72b9 | 9326 | new_fix = *fix; |
e0001a05 | 9327 | |
43cd72b9 BW |
9328 | /* The fix does not need to be translated if the section cannot change. */ |
9329 | if (!relax_info->is_relaxable_literal_section | |
9330 | && !relax_info->is_relaxable_asm_section) | |
9331 | { | |
9332 | fix->translated = TRUE; | |
9333 | return TRUE; | |
9334 | } | |
e0001a05 | 9335 | |
43cd72b9 BW |
9336 | /* If the literal has been moved and this relocation was on an |
9337 | opcode, then the relocation should move to the new literal | |
9338 | location. Otherwise, the relocation should move within the | |
9339 | section. */ | |
9340 | ||
9341 | removed = FALSE; | |
9342 | if (is_operand_relocation (fix->src_type)) | |
9343 | { | |
9344 | /* Check if the original relocation is against a literal being | |
9345 | removed. */ | |
9346 | removed = find_removed_literal (&relax_info->removed_list, | |
9347 | target_offset); | |
e0001a05 NC |
9348 | } |
9349 | ||
43cd72b9 | 9350 | if (removed) |
e0001a05 | 9351 | { |
43cd72b9 | 9352 | asection *new_sec; |
e0001a05 | 9353 | |
43cd72b9 BW |
9354 | /* The fact that there is still a relocation to this literal indicates |
9355 | that the literal is being coalesced, not simply removed. */ | |
9356 | BFD_ASSERT (removed->to.abfd != NULL); | |
e0001a05 | 9357 | |
43cd72b9 BW |
9358 | /* This was moved to some other address (possibly another section). */ |
9359 | new_sec = r_reloc_get_section (&removed->to); | |
9360 | if (new_sec != sec) | |
e0001a05 | 9361 | { |
43cd72b9 BW |
9362 | sec = new_sec; |
9363 | relax_info = get_xtensa_relax_info (sec); | |
9364 | if (!relax_info || | |
9365 | (!relax_info->is_relaxable_literal_section | |
9366 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 | 9367 | { |
43cd72b9 BW |
9368 | target_offset = removed->to.target_offset; |
9369 | new_fix.target_sec = new_sec; | |
9370 | new_fix.target_offset = target_offset; | |
9371 | new_fix.translated = TRUE; | |
9372 | *fix = new_fix; | |
9373 | return TRUE; | |
e0001a05 | 9374 | } |
e0001a05 | 9375 | } |
43cd72b9 BW |
9376 | target_offset = removed->to.target_offset; |
9377 | new_fix.target_sec = new_sec; | |
e0001a05 | 9378 | } |
43cd72b9 BW |
9379 | |
9380 | /* The target address may have been moved within its section. */ | |
9381 | new_offset = offset_with_removed_text (&relax_info->action_list, | |
9382 | target_offset); | |
9383 | ||
9384 | new_fix.target_offset = new_offset; | |
9385 | new_fix.target_offset = new_offset; | |
9386 | new_fix.translated = TRUE; | |
9387 | *fix = new_fix; | |
9388 | return TRUE; | |
e0001a05 NC |
9389 | } |
9390 | ||
9391 | ||
9392 | /* Fix up a relocation to take account of removed literals. */ | |
9393 | ||
9b7f5d20 BW |
9394 | static asection * |
9395 | translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec) | |
e0001a05 | 9396 | { |
e0001a05 NC |
9397 | xtensa_relax_info *relax_info; |
9398 | removed_literal *removed; | |
9b7f5d20 BW |
9399 | bfd_vma target_offset, base_offset; |
9400 | text_action *act; | |
e0001a05 NC |
9401 | |
9402 | *new_rel = *orig_rel; | |
9403 | ||
9404 | if (!r_reloc_is_defined (orig_rel)) | |
9b7f5d20 | 9405 | return sec ; |
e0001a05 NC |
9406 | |
9407 | relax_info = get_xtensa_relax_info (sec); | |
9b7f5d20 BW |
9408 | BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section |
9409 | || relax_info->is_relaxable_asm_section)); | |
e0001a05 | 9410 | |
43cd72b9 BW |
9411 | target_offset = orig_rel->target_offset; |
9412 | ||
9413 | removed = FALSE; | |
9414 | if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info))) | |
9415 | { | |
9416 | /* Check if the original relocation is against a literal being | |
9417 | removed. */ | |
9418 | removed = find_removed_literal (&relax_info->removed_list, | |
9419 | target_offset); | |
9420 | } | |
9421 | if (removed && removed->to.abfd) | |
e0001a05 NC |
9422 | { |
9423 | asection *new_sec; | |
9424 | ||
9425 | /* The fact that there is still a relocation to this literal indicates | |
9426 | that the literal is being coalesced, not simply removed. */ | |
9427 | BFD_ASSERT (removed->to.abfd != NULL); | |
9428 | ||
43cd72b9 BW |
9429 | /* This was moved to some other address |
9430 | (possibly in another section). */ | |
e0001a05 NC |
9431 | *new_rel = removed->to; |
9432 | new_sec = r_reloc_get_section (new_rel); | |
43cd72b9 | 9433 | if (new_sec != sec) |
e0001a05 NC |
9434 | { |
9435 | sec = new_sec; | |
9436 | relax_info = get_xtensa_relax_info (sec); | |
43cd72b9 BW |
9437 | if (!relax_info |
9438 | || (!relax_info->is_relaxable_literal_section | |
9439 | && !relax_info->is_relaxable_asm_section)) | |
9b7f5d20 | 9440 | return sec; |
e0001a05 | 9441 | } |
43cd72b9 | 9442 | target_offset = new_rel->target_offset; |
e0001a05 NC |
9443 | } |
9444 | ||
9b7f5d20 BW |
9445 | /* Find the base offset of the reloc symbol, excluding any addend from the |
9446 | reloc or from the section contents (for a partial_inplace reloc). Then | |
9447 | find the adjusted values of the offsets due to relaxation. The base | |
9448 | offset is needed to determine the change to the reloc's addend; the reloc | |
9449 | addend should not be adjusted due to relaxations located before the base | |
9450 | offset. */ | |
9451 | ||
9452 | base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend; | |
9453 | act = relax_info->action_list.head; | |
9454 | if (base_offset <= target_offset) | |
9455 | { | |
9456 | int base_removed = removed_by_actions (&act, base_offset, FALSE); | |
9457 | int addend_removed = removed_by_actions (&act, target_offset, FALSE); | |
9458 | new_rel->target_offset = target_offset - base_removed - addend_removed; | |
9459 | new_rel->rela.r_addend -= addend_removed; | |
9460 | } | |
9461 | else | |
9462 | { | |
9463 | /* Handle a negative addend. The base offset comes first. */ | |
9464 | int tgt_removed = removed_by_actions (&act, target_offset, FALSE); | |
9465 | int addend_removed = removed_by_actions (&act, base_offset, FALSE); | |
9466 | new_rel->target_offset = target_offset - tgt_removed; | |
9467 | new_rel->rela.r_addend += addend_removed; | |
9468 | } | |
e0001a05 | 9469 | |
9b7f5d20 | 9470 | return sec; |
e0001a05 NC |
9471 | } |
9472 | ||
9473 | ||
9474 | /* For dynamic links, there may be a dynamic relocation for each | |
9475 | literal. The number of dynamic relocations must be computed in | |
9476 | size_dynamic_sections, which occurs before relaxation. When a | |
9477 | literal is removed, this function checks if there is a corresponding | |
9478 | dynamic relocation and shrinks the size of the appropriate dynamic | |
9479 | relocation section accordingly. At this point, the contents of the | |
9480 | dynamic relocation sections have not yet been filled in, so there's | |
9481 | nothing else that needs to be done. */ | |
9482 | ||
9483 | static void | |
7fa3d080 BW |
9484 | shrink_dynamic_reloc_sections (struct bfd_link_info *info, |
9485 | bfd *abfd, | |
9486 | asection *input_section, | |
9487 | Elf_Internal_Rela *rel) | |
e0001a05 | 9488 | { |
f0e6fdb2 | 9489 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
9490 | Elf_Internal_Shdr *symtab_hdr; |
9491 | struct elf_link_hash_entry **sym_hashes; | |
9492 | unsigned long r_symndx; | |
9493 | int r_type; | |
9494 | struct elf_link_hash_entry *h; | |
9495 | bfd_boolean dynamic_symbol; | |
9496 | ||
f0e6fdb2 | 9497 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
9498 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
9499 | sym_hashes = elf_sym_hashes (abfd); | |
9500 | ||
9501 | r_type = ELF32_R_TYPE (rel->r_info); | |
9502 | r_symndx = ELF32_R_SYM (rel->r_info); | |
9503 | ||
9504 | if (r_symndx < symtab_hdr->sh_info) | |
9505 | h = NULL; | |
9506 | else | |
9507 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9508 | ||
4608f3d9 | 9509 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 NC |
9510 | |
9511 | if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
9512 | && (input_section->flags & SEC_ALLOC) != 0 | |
9513 | && (dynamic_symbol || info->shared)) | |
9514 | { | |
e0001a05 NC |
9515 | asection *srel; |
9516 | bfd_boolean is_plt = FALSE; | |
9517 | ||
e0001a05 NC |
9518 | if (dynamic_symbol && r_type == R_XTENSA_PLT) |
9519 | { | |
f0e6fdb2 | 9520 | srel = htab->srelplt; |
e0001a05 NC |
9521 | is_plt = TRUE; |
9522 | } | |
9523 | else | |
f0e6fdb2 | 9524 | srel = htab->srelgot; |
e0001a05 NC |
9525 | |
9526 | /* Reduce size of the .rela.* section by one reloc. */ | |
e0001a05 | 9527 | BFD_ASSERT (srel != NULL); |
eea6121a AM |
9528 | BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela)); |
9529 | srel->size -= sizeof (Elf32_External_Rela); | |
e0001a05 NC |
9530 | |
9531 | if (is_plt) | |
9532 | { | |
9533 | asection *splt, *sgotplt, *srelgot; | |
9534 | int reloc_index, chunk; | |
9535 | ||
9536 | /* Find the PLT reloc index of the entry being removed. This | |
9537 | is computed from the size of ".rela.plt". It is needed to | |
9538 | figure out which PLT chunk to resize. Usually "last index | |
9539 | = size - 1" since the index starts at zero, but in this | |
9540 | context, the size has just been decremented so there's no | |
9541 | need to subtract one. */ | |
eea6121a | 9542 | reloc_index = srel->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
9543 | |
9544 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
9545 | splt = elf_xtensa_get_plt_section (info, chunk); |
9546 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
9547 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
9548 | ||
9549 | /* Check if an entire PLT chunk has just been eliminated. */ | |
9550 | if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0) | |
9551 | { | |
9552 | /* The two magic GOT entries for that chunk can go away. */ | |
f0e6fdb2 | 9553 | srelgot = htab->srelgot; |
e0001a05 NC |
9554 | BFD_ASSERT (srelgot != NULL); |
9555 | srelgot->reloc_count -= 2; | |
eea6121a AM |
9556 | srelgot->size -= 2 * sizeof (Elf32_External_Rela); |
9557 | sgotplt->size -= 8; | |
e0001a05 NC |
9558 | |
9559 | /* There should be only one entry left (and it will be | |
9560 | removed below). */ | |
eea6121a AM |
9561 | BFD_ASSERT (sgotplt->size == 4); |
9562 | BFD_ASSERT (splt->size == PLT_ENTRY_SIZE); | |
e0001a05 NC |
9563 | } |
9564 | ||
eea6121a AM |
9565 | BFD_ASSERT (sgotplt->size >= 4); |
9566 | BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE); | |
e0001a05 | 9567 | |
eea6121a AM |
9568 | sgotplt->size -= 4; |
9569 | splt->size -= PLT_ENTRY_SIZE; | |
e0001a05 NC |
9570 | } |
9571 | } | |
9572 | } | |
9573 | ||
9574 | ||
43cd72b9 BW |
9575 | /* Take an r_rel and move it to another section. This usually |
9576 | requires extending the interal_relocation array and pinning it. If | |
9577 | the original r_rel is from the same BFD, we can complete this here. | |
9578 | Otherwise, we add a fix record to let the final link fix the | |
9579 | appropriate address. Contents and internal relocations for the | |
9580 | section must be pinned after calling this routine. */ | |
9581 | ||
9582 | static bfd_boolean | |
7fa3d080 BW |
9583 | move_literal (bfd *abfd, |
9584 | struct bfd_link_info *link_info, | |
9585 | asection *sec, | |
9586 | bfd_vma offset, | |
9587 | bfd_byte *contents, | |
9588 | xtensa_relax_info *relax_info, | |
9589 | Elf_Internal_Rela **internal_relocs_p, | |
9590 | const literal_value *lit) | |
43cd72b9 BW |
9591 | { |
9592 | Elf_Internal_Rela *new_relocs = NULL; | |
9593 | size_t new_relocs_count = 0; | |
9594 | Elf_Internal_Rela this_rela; | |
9595 | const r_reloc *r_rel; | |
9596 | ||
9597 | r_rel = &lit->r_rel; | |
9598 | BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p); | |
9599 | ||
9600 | if (r_reloc_is_const (r_rel)) | |
9601 | bfd_put_32 (abfd, lit->value, contents + offset); | |
9602 | else | |
9603 | { | |
9604 | int r_type; | |
9605 | unsigned i; | |
9606 | asection *target_sec; | |
9607 | reloc_bfd_fix *fix; | |
9608 | unsigned insert_at; | |
9609 | ||
9610 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
9611 | target_sec = r_reloc_get_section (r_rel); | |
9612 | ||
9613 | /* This is the difficult case. We have to create a fix up. */ | |
9614 | this_rela.r_offset = offset; | |
9615 | this_rela.r_info = ELF32_R_INFO (0, r_type); | |
9616 | this_rela.r_addend = | |
9617 | r_rel->target_offset - r_reloc_get_target_offset (r_rel); | |
9618 | bfd_put_32 (abfd, lit->value, contents + offset); | |
9619 | ||
9620 | /* Currently, we cannot move relocations during a relocatable link. */ | |
9621 | BFD_ASSERT (!link_info->relocatable); | |
0f5f1638 | 9622 | fix = reloc_bfd_fix_init (sec, offset, r_type, |
43cd72b9 BW |
9623 | r_reloc_get_section (r_rel), |
9624 | r_rel->target_offset + r_rel->virtual_offset, | |
9625 | FALSE); | |
9626 | /* We also need to mark that relocations are needed here. */ | |
9627 | sec->flags |= SEC_RELOC; | |
9628 | ||
9629 | translate_reloc_bfd_fix (fix); | |
9630 | /* This fix has not yet been translated. */ | |
9631 | add_fix (sec, fix); | |
9632 | ||
9633 | /* Add the relocation. If we have already allocated our own | |
9634 | space for the relocations and we have room for more, then use | |
9635 | it. Otherwise, allocate new space and move the literals. */ | |
9636 | insert_at = sec->reloc_count; | |
9637 | for (i = 0; i < sec->reloc_count; ++i) | |
9638 | { | |
9639 | if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset) | |
9640 | { | |
9641 | insert_at = i; | |
9642 | break; | |
9643 | } | |
9644 | } | |
9645 | ||
9646 | if (*internal_relocs_p != relax_info->allocated_relocs | |
9647 | || sec->reloc_count + 1 > relax_info->allocated_relocs_count) | |
9648 | { | |
9649 | BFD_ASSERT (relax_info->allocated_relocs == NULL | |
9650 | || sec->reloc_count == relax_info->relocs_count); | |
9651 | ||
9652 | if (relax_info->allocated_relocs_count == 0) | |
9653 | new_relocs_count = (sec->reloc_count + 2) * 2; | |
9654 | else | |
9655 | new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2; | |
9656 | ||
9657 | new_relocs = (Elf_Internal_Rela *) | |
9658 | bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count)); | |
9659 | if (!new_relocs) | |
9660 | return FALSE; | |
9661 | ||
9662 | /* We could handle this more quickly by finding the split point. */ | |
9663 | if (insert_at != 0) | |
9664 | memcpy (new_relocs, *internal_relocs_p, | |
9665 | insert_at * sizeof (Elf_Internal_Rela)); | |
9666 | ||
9667 | new_relocs[insert_at] = this_rela; | |
9668 | ||
9669 | if (insert_at != sec->reloc_count) | |
9670 | memcpy (new_relocs + insert_at + 1, | |
9671 | (*internal_relocs_p) + insert_at, | |
9672 | (sec->reloc_count - insert_at) | |
9673 | * sizeof (Elf_Internal_Rela)); | |
9674 | ||
9675 | if (*internal_relocs_p != relax_info->allocated_relocs) | |
9676 | { | |
9677 | /* The first time we re-allocate, we can only free the | |
9678 | old relocs if they were allocated with bfd_malloc. | |
9679 | This is not true when keep_memory is in effect. */ | |
9680 | if (!link_info->keep_memory) | |
9681 | free (*internal_relocs_p); | |
9682 | } | |
9683 | else | |
9684 | free (*internal_relocs_p); | |
9685 | relax_info->allocated_relocs = new_relocs; | |
9686 | relax_info->allocated_relocs_count = new_relocs_count; | |
9687 | elf_section_data (sec)->relocs = new_relocs; | |
9688 | sec->reloc_count++; | |
9689 | relax_info->relocs_count = sec->reloc_count; | |
9690 | *internal_relocs_p = new_relocs; | |
9691 | } | |
9692 | else | |
9693 | { | |
9694 | if (insert_at != sec->reloc_count) | |
9695 | { | |
9696 | unsigned idx; | |
9697 | for (idx = sec->reloc_count; idx > insert_at; idx--) | |
9698 | (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1]; | |
9699 | } | |
9700 | (*internal_relocs_p)[insert_at] = this_rela; | |
9701 | sec->reloc_count++; | |
9702 | if (relax_info->allocated_relocs) | |
9703 | relax_info->relocs_count = sec->reloc_count; | |
9704 | } | |
9705 | } | |
9706 | return TRUE; | |
9707 | } | |
9708 | ||
9709 | ||
e0001a05 NC |
9710 | /* This is similar to relax_section except that when a target is moved, |
9711 | we shift addresses up. We also need to modify the size. This | |
9712 | algorithm does NOT allow for relocations into the middle of the | |
9713 | property sections. */ | |
9714 | ||
43cd72b9 | 9715 | static bfd_boolean |
7fa3d080 BW |
9716 | relax_property_section (bfd *abfd, |
9717 | asection *sec, | |
9718 | struct bfd_link_info *link_info) | |
e0001a05 NC |
9719 | { |
9720 | Elf_Internal_Rela *internal_relocs; | |
9721 | bfd_byte *contents; | |
1d25768e | 9722 | unsigned i; |
e0001a05 | 9723 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
9724 | bfd_boolean is_full_prop_section; |
9725 | size_t last_zfill_target_offset = 0; | |
9726 | asection *last_zfill_target_sec = NULL; | |
9727 | bfd_size_type sec_size; | |
1d25768e | 9728 | bfd_size_type entry_size; |
e0001a05 | 9729 | |
43cd72b9 | 9730 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
9731 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
9732 | link_info->keep_memory); | |
9733 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 9734 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
9735 | { |
9736 | ok = FALSE; | |
9737 | goto error_return; | |
9738 | } | |
9739 | ||
1d25768e BW |
9740 | is_full_prop_section = xtensa_is_proptable_section (sec); |
9741 | if (is_full_prop_section) | |
9742 | entry_size = 12; | |
9743 | else | |
9744 | entry_size = 8; | |
43cd72b9 BW |
9745 | |
9746 | if (internal_relocs) | |
e0001a05 | 9747 | { |
43cd72b9 | 9748 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
9749 | { |
9750 | Elf_Internal_Rela *irel; | |
9751 | xtensa_relax_info *target_relax_info; | |
e0001a05 NC |
9752 | unsigned r_type; |
9753 | asection *target_sec; | |
43cd72b9 BW |
9754 | literal_value val; |
9755 | bfd_byte *size_p, *flags_p; | |
e0001a05 NC |
9756 | |
9757 | /* Locally change the source address. | |
9758 | Translate the target to the new target address. | |
9759 | If it points to this section and has been removed, MOVE IT. | |
9760 | Also, don't forget to modify the associated SIZE at | |
9761 | (offset + 4). */ | |
9762 | ||
9763 | irel = &internal_relocs[i]; | |
9764 | r_type = ELF32_R_TYPE (irel->r_info); | |
9765 | if (r_type == R_XTENSA_NONE) | |
9766 | continue; | |
9767 | ||
43cd72b9 BW |
9768 | /* Find the literal value. */ |
9769 | r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size); | |
9770 | size_p = &contents[irel->r_offset + 4]; | |
9771 | flags_p = NULL; | |
9772 | if (is_full_prop_section) | |
1d25768e BW |
9773 | flags_p = &contents[irel->r_offset + 8]; |
9774 | BFD_ASSERT (irel->r_offset + entry_size <= sec_size); | |
e0001a05 | 9775 | |
43cd72b9 | 9776 | target_sec = r_reloc_get_section (&val.r_rel); |
e0001a05 NC |
9777 | target_relax_info = get_xtensa_relax_info (target_sec); |
9778 | ||
9779 | if (target_relax_info | |
43cd72b9 BW |
9780 | && (target_relax_info->is_relaxable_literal_section |
9781 | || target_relax_info->is_relaxable_asm_section )) | |
e0001a05 NC |
9782 | { |
9783 | /* Translate the relocation's destination. */ | |
03669f1c BW |
9784 | bfd_vma old_offset = val.r_rel.target_offset; |
9785 | bfd_vma new_offset; | |
e0001a05 | 9786 | long old_size, new_size; |
03669f1c BW |
9787 | text_action *act = target_relax_info->action_list.head; |
9788 | new_offset = old_offset - | |
9789 | removed_by_actions (&act, old_offset, FALSE); | |
e0001a05 NC |
9790 | |
9791 | /* Assert that we are not out of bounds. */ | |
43cd72b9 | 9792 | old_size = bfd_get_32 (abfd, size_p); |
03669f1c | 9793 | new_size = old_size; |
43cd72b9 BW |
9794 | |
9795 | if (old_size == 0) | |
9796 | { | |
9797 | /* Only the first zero-sized unreachable entry is | |
9798 | allowed to expand. In this case the new offset | |
9799 | should be the offset before the fill and the new | |
9800 | size is the expansion size. For other zero-sized | |
9801 | entries the resulting size should be zero with an | |
9802 | offset before or after the fill address depending | |
9803 | on whether the expanding unreachable entry | |
9804 | preceeds it. */ | |
03669f1c BW |
9805 | if (last_zfill_target_sec == 0 |
9806 | || last_zfill_target_sec != target_sec | |
9807 | || last_zfill_target_offset != old_offset) | |
43cd72b9 | 9808 | { |
03669f1c BW |
9809 | bfd_vma new_end_offset = new_offset; |
9810 | ||
9811 | /* Recompute the new_offset, but this time don't | |
9812 | include any fill inserted by relaxation. */ | |
9813 | act = target_relax_info->action_list.head; | |
9814 | new_offset = old_offset - | |
9815 | removed_by_actions (&act, old_offset, TRUE); | |
43cd72b9 BW |
9816 | |
9817 | /* If it is not unreachable and we have not yet | |
9818 | seen an unreachable at this address, place it | |
9819 | before the fill address. */ | |
03669f1c BW |
9820 | if (flags_p && (bfd_get_32 (abfd, flags_p) |
9821 | & XTENSA_PROP_UNREACHABLE) != 0) | |
43cd72b9 | 9822 | { |
03669f1c BW |
9823 | new_size = new_end_offset - new_offset; |
9824 | ||
43cd72b9 | 9825 | last_zfill_target_sec = target_sec; |
03669f1c | 9826 | last_zfill_target_offset = old_offset; |
43cd72b9 BW |
9827 | } |
9828 | } | |
9829 | } | |
9830 | else | |
03669f1c BW |
9831 | new_size -= |
9832 | removed_by_actions (&act, old_offset + old_size, TRUE); | |
43cd72b9 | 9833 | |
e0001a05 NC |
9834 | if (new_size != old_size) |
9835 | { | |
9836 | bfd_put_32 (abfd, new_size, size_p); | |
9837 | pin_contents (sec, contents); | |
9838 | } | |
43cd72b9 | 9839 | |
03669f1c | 9840 | if (new_offset != old_offset) |
e0001a05 | 9841 | { |
03669f1c | 9842 | bfd_vma diff = new_offset - old_offset; |
e0001a05 NC |
9843 | irel->r_addend += diff; |
9844 | pin_internal_relocs (sec, internal_relocs); | |
9845 | } | |
9846 | } | |
9847 | } | |
9848 | } | |
9849 | ||
9850 | /* Combine adjacent property table entries. This is also done in | |
9851 | finish_dynamic_sections() but at that point it's too late to | |
9852 | reclaim the space in the output section, so we do this twice. */ | |
9853 | ||
43cd72b9 | 9854 | if (internal_relocs && (!link_info->relocatable |
1d25768e | 9855 | || xtensa_is_littable_section (sec))) |
e0001a05 NC |
9856 | { |
9857 | Elf_Internal_Rela *last_irel = NULL; | |
1d25768e | 9858 | Elf_Internal_Rela *irel, *next_rel, *rel_end; |
e0001a05 | 9859 | int removed_bytes = 0; |
1d25768e | 9860 | bfd_vma offset; |
43cd72b9 BW |
9861 | flagword predef_flags; |
9862 | ||
43cd72b9 | 9863 | predef_flags = xtensa_get_property_predef_flags (sec); |
e0001a05 | 9864 | |
1d25768e | 9865 | /* Walk over memory and relocations at the same time. |
e0001a05 NC |
9866 | This REQUIRES that the internal_relocs be sorted by offset. */ |
9867 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
9868 | internal_reloc_compare); | |
e0001a05 NC |
9869 | |
9870 | pin_internal_relocs (sec, internal_relocs); | |
9871 | pin_contents (sec, contents); | |
9872 | ||
1d25768e BW |
9873 | next_rel = internal_relocs; |
9874 | rel_end = internal_relocs + sec->reloc_count; | |
9875 | ||
a3ef2d63 | 9876 | BFD_ASSERT (sec->size % entry_size == 0); |
e0001a05 | 9877 | |
a3ef2d63 | 9878 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 | 9879 | { |
1d25768e | 9880 | Elf_Internal_Rela *offset_rel, *extra_rel; |
e0001a05 | 9881 | bfd_vma bytes_to_remove, size, actual_offset; |
1d25768e | 9882 | bfd_boolean remove_this_rel; |
43cd72b9 | 9883 | flagword flags; |
e0001a05 | 9884 | |
1d25768e BW |
9885 | /* Find the first relocation for the entry at the current offset. |
9886 | Adjust the offsets of any extra relocations for the previous | |
9887 | entry. */ | |
9888 | offset_rel = NULL; | |
9889 | if (next_rel) | |
9890 | { | |
9891 | for (irel = next_rel; irel < rel_end; irel++) | |
9892 | { | |
9893 | if ((irel->r_offset == offset | |
9894 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) | |
9895 | || irel->r_offset > offset) | |
9896 | { | |
9897 | offset_rel = irel; | |
9898 | break; | |
9899 | } | |
9900 | irel->r_offset -= removed_bytes; | |
1d25768e BW |
9901 | } |
9902 | } | |
e0001a05 | 9903 | |
1d25768e BW |
9904 | /* Find the next relocation (if there are any left). */ |
9905 | extra_rel = NULL; | |
9906 | if (offset_rel) | |
e0001a05 | 9907 | { |
1d25768e | 9908 | for (irel = offset_rel + 1; irel < rel_end; irel++) |
e0001a05 | 9909 | { |
1d25768e BW |
9910 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) |
9911 | { | |
9912 | extra_rel = irel; | |
9913 | break; | |
9914 | } | |
e0001a05 | 9915 | } |
e0001a05 NC |
9916 | } |
9917 | ||
1d25768e BW |
9918 | /* Check if there are relocations on the current entry. There |
9919 | should usually be a relocation on the offset field. If there | |
9920 | are relocations on the size or flags, then we can't optimize | |
9921 | this entry. Also, find the next relocation to examine on the | |
9922 | next iteration. */ | |
9923 | if (offset_rel) | |
e0001a05 | 9924 | { |
1d25768e | 9925 | if (offset_rel->r_offset >= offset + entry_size) |
e0001a05 | 9926 | { |
1d25768e BW |
9927 | next_rel = offset_rel; |
9928 | /* There are no relocations on the current entry, but we | |
9929 | might still be able to remove it if the size is zero. */ | |
9930 | offset_rel = NULL; | |
9931 | } | |
9932 | else if (offset_rel->r_offset > offset | |
9933 | || (extra_rel | |
9934 | && extra_rel->r_offset < offset + entry_size)) | |
9935 | { | |
9936 | /* There is a relocation on the size or flags, so we can't | |
9937 | do anything with this entry. Continue with the next. */ | |
9938 | next_rel = offset_rel; | |
9939 | continue; | |
9940 | } | |
9941 | else | |
9942 | { | |
9943 | BFD_ASSERT (offset_rel->r_offset == offset); | |
9944 | offset_rel->r_offset -= removed_bytes; | |
9945 | next_rel = offset_rel + 1; | |
e0001a05 | 9946 | } |
e0001a05 | 9947 | } |
1d25768e BW |
9948 | else |
9949 | next_rel = NULL; | |
e0001a05 | 9950 | |
1d25768e | 9951 | remove_this_rel = FALSE; |
e0001a05 NC |
9952 | bytes_to_remove = 0; |
9953 | actual_offset = offset - removed_bytes; | |
9954 | size = bfd_get_32 (abfd, &contents[actual_offset + 4]); | |
9955 | ||
43cd72b9 BW |
9956 | if (is_full_prop_section) |
9957 | flags = bfd_get_32 (abfd, &contents[actual_offset + 8]); | |
9958 | else | |
9959 | flags = predef_flags; | |
9960 | ||
1d25768e BW |
9961 | if (size == 0 |
9962 | && (flags & XTENSA_PROP_ALIGN) == 0 | |
9963 | && (flags & XTENSA_PROP_UNREACHABLE) == 0) | |
e0001a05 | 9964 | { |
43cd72b9 BW |
9965 | /* Always remove entries with zero size and no alignment. */ |
9966 | bytes_to_remove = entry_size; | |
1d25768e BW |
9967 | if (offset_rel) |
9968 | remove_this_rel = TRUE; | |
e0001a05 | 9969 | } |
1d25768e BW |
9970 | else if (offset_rel |
9971 | && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32) | |
e0001a05 | 9972 | { |
1d25768e | 9973 | if (last_irel) |
e0001a05 | 9974 | { |
1d25768e BW |
9975 | flagword old_flags; |
9976 | bfd_vma old_size = | |
9977 | bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]); | |
9978 | bfd_vma old_address = | |
9979 | (last_irel->r_addend | |
9980 | + bfd_get_32 (abfd, &contents[last_irel->r_offset])); | |
9981 | bfd_vma new_address = | |
9982 | (offset_rel->r_addend | |
9983 | + bfd_get_32 (abfd, &contents[actual_offset])); | |
9984 | if (is_full_prop_section) | |
9985 | old_flags = bfd_get_32 | |
9986 | (abfd, &contents[last_irel->r_offset + 8]); | |
9987 | else | |
9988 | old_flags = predef_flags; | |
9989 | ||
9990 | if ((ELF32_R_SYM (offset_rel->r_info) | |
9991 | == ELF32_R_SYM (last_irel->r_info)) | |
9992 | && old_address + old_size == new_address | |
9993 | && old_flags == flags | |
9994 | && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0 | |
9995 | && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0) | |
e0001a05 | 9996 | { |
1d25768e BW |
9997 | /* Fix the old size. */ |
9998 | bfd_put_32 (abfd, old_size + size, | |
9999 | &contents[last_irel->r_offset + 4]); | |
10000 | bytes_to_remove = entry_size; | |
10001 | remove_this_rel = TRUE; | |
e0001a05 NC |
10002 | } |
10003 | else | |
1d25768e | 10004 | last_irel = offset_rel; |
e0001a05 | 10005 | } |
1d25768e BW |
10006 | else |
10007 | last_irel = offset_rel; | |
e0001a05 NC |
10008 | } |
10009 | ||
1d25768e | 10010 | if (remove_this_rel) |
e0001a05 | 10011 | { |
1d25768e | 10012 | offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); |
3df502ae | 10013 | offset_rel->r_offset = 0; |
e0001a05 NC |
10014 | } |
10015 | ||
10016 | if (bytes_to_remove != 0) | |
10017 | { | |
10018 | removed_bytes += bytes_to_remove; | |
a3ef2d63 | 10019 | if (offset + bytes_to_remove < sec->size) |
e0001a05 | 10020 | memmove (&contents[actual_offset], |
43cd72b9 | 10021 | &contents[actual_offset + bytes_to_remove], |
a3ef2d63 | 10022 | sec->size - offset - bytes_to_remove); |
e0001a05 NC |
10023 | } |
10024 | } | |
10025 | ||
43cd72b9 | 10026 | if (removed_bytes) |
e0001a05 | 10027 | { |
1d25768e BW |
10028 | /* Fix up any extra relocations on the last entry. */ |
10029 | for (irel = next_rel; irel < rel_end; irel++) | |
10030 | irel->r_offset -= removed_bytes; | |
10031 | ||
e0001a05 | 10032 | /* Clear the removed bytes. */ |
a3ef2d63 | 10033 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 | 10034 | |
a3ef2d63 BW |
10035 | if (sec->rawsize == 0) |
10036 | sec->rawsize = sec->size; | |
10037 | sec->size -= removed_bytes; | |
e901de89 BW |
10038 | |
10039 | if (xtensa_is_littable_section (sec)) | |
10040 | { | |
f0e6fdb2 BW |
10041 | asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc; |
10042 | if (sgotloc) | |
10043 | sgotloc->size -= removed_bytes; | |
e901de89 | 10044 | } |
e0001a05 NC |
10045 | } |
10046 | } | |
e901de89 | 10047 | |
e0001a05 NC |
10048 | error_return: |
10049 | release_internal_relocs (sec, internal_relocs); | |
10050 | release_contents (sec, contents); | |
10051 | return ok; | |
10052 | } | |
10053 | ||
10054 | \f | |
10055 | /* Third relaxation pass. */ | |
10056 | ||
10057 | /* Change symbol values to account for removed literals. */ | |
10058 | ||
43cd72b9 | 10059 | bfd_boolean |
7fa3d080 | 10060 | relax_section_symbols (bfd *abfd, asection *sec) |
e0001a05 NC |
10061 | { |
10062 | xtensa_relax_info *relax_info; | |
10063 | unsigned int sec_shndx; | |
10064 | Elf_Internal_Shdr *symtab_hdr; | |
10065 | Elf_Internal_Sym *isymbuf; | |
10066 | unsigned i, num_syms, num_locals; | |
10067 | ||
10068 | relax_info = get_xtensa_relax_info (sec); | |
10069 | BFD_ASSERT (relax_info); | |
10070 | ||
43cd72b9 BW |
10071 | if (!relax_info->is_relaxable_literal_section |
10072 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
10073 | return TRUE; |
10074 | ||
10075 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
10076 | ||
10077 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10078 | isymbuf = retrieve_local_syms (abfd); | |
10079 | ||
10080 | num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
10081 | num_locals = symtab_hdr->sh_info; | |
10082 | ||
10083 | /* Adjust the local symbols defined in this section. */ | |
10084 | for (i = 0; i < num_locals; i++) | |
10085 | { | |
10086 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
10087 | ||
10088 | if (isym->st_shndx == sec_shndx) | |
10089 | { | |
03669f1c BW |
10090 | text_action *act = relax_info->action_list.head; |
10091 | bfd_vma orig_addr = isym->st_value; | |
43cd72b9 | 10092 | |
03669f1c | 10093 | isym->st_value -= removed_by_actions (&act, orig_addr, FALSE); |
43cd72b9 | 10094 | |
03669f1c BW |
10095 | if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC) |
10096 | isym->st_size -= | |
10097 | removed_by_actions (&act, orig_addr + isym->st_size, FALSE); | |
e0001a05 NC |
10098 | } |
10099 | } | |
10100 | ||
10101 | /* Now adjust the global symbols defined in this section. */ | |
10102 | for (i = 0; i < (num_syms - num_locals); i++) | |
10103 | { | |
10104 | struct elf_link_hash_entry *sym_hash; | |
10105 | ||
10106 | sym_hash = elf_sym_hashes (abfd)[i]; | |
10107 | ||
10108 | if (sym_hash->root.type == bfd_link_hash_warning) | |
10109 | sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link; | |
10110 | ||
10111 | if ((sym_hash->root.type == bfd_link_hash_defined | |
10112 | || sym_hash->root.type == bfd_link_hash_defweak) | |
10113 | && sym_hash->root.u.def.section == sec) | |
10114 | { | |
03669f1c BW |
10115 | text_action *act = relax_info->action_list.head; |
10116 | bfd_vma orig_addr = sym_hash->root.u.def.value; | |
43cd72b9 | 10117 | |
03669f1c BW |
10118 | sym_hash->root.u.def.value -= |
10119 | removed_by_actions (&act, orig_addr, FALSE); | |
43cd72b9 | 10120 | |
03669f1c BW |
10121 | if (sym_hash->type == STT_FUNC) |
10122 | sym_hash->size -= | |
10123 | removed_by_actions (&act, orig_addr + sym_hash->size, FALSE); | |
e0001a05 NC |
10124 | } |
10125 | } | |
10126 | ||
10127 | return TRUE; | |
10128 | } | |
10129 | ||
10130 | \f | |
10131 | /* "Fix" handling functions, called while performing relocations. */ | |
10132 | ||
43cd72b9 | 10133 | static bfd_boolean |
7fa3d080 BW |
10134 | do_fix_for_relocatable_link (Elf_Internal_Rela *rel, |
10135 | bfd *input_bfd, | |
10136 | asection *input_section, | |
10137 | bfd_byte *contents) | |
e0001a05 NC |
10138 | { |
10139 | r_reloc r_rel; | |
10140 | asection *sec, *old_sec; | |
10141 | bfd_vma old_offset; | |
10142 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 NC |
10143 | reloc_bfd_fix *fix; |
10144 | ||
10145 | if (r_type == R_XTENSA_NONE) | |
43cd72b9 | 10146 | return TRUE; |
e0001a05 | 10147 | |
43cd72b9 BW |
10148 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10149 | if (!fix) | |
10150 | return TRUE; | |
e0001a05 | 10151 | |
43cd72b9 BW |
10152 | r_reloc_init (&r_rel, input_bfd, rel, contents, |
10153 | bfd_get_section_limit (input_bfd, input_section)); | |
e0001a05 | 10154 | old_sec = r_reloc_get_section (&r_rel); |
43cd72b9 BW |
10155 | old_offset = r_rel.target_offset; |
10156 | ||
10157 | if (!old_sec || !r_reloc_is_defined (&r_rel)) | |
e0001a05 | 10158 | { |
43cd72b9 BW |
10159 | if (r_type != R_XTENSA_ASM_EXPAND) |
10160 | { | |
10161 | (*_bfd_error_handler) | |
10162 | (_("%B(%A+0x%lx): unexpected fix for %s relocation"), | |
10163 | input_bfd, input_section, rel->r_offset, | |
10164 | elf_howto_table[r_type].name); | |
10165 | return FALSE; | |
10166 | } | |
e0001a05 NC |
10167 | /* Leave it be. Resolution will happen in a later stage. */ |
10168 | } | |
10169 | else | |
10170 | { | |
10171 | sec = fix->target_sec; | |
10172 | rel->r_addend += ((sec->output_offset + fix->target_offset) | |
10173 | - (old_sec->output_offset + old_offset)); | |
10174 | } | |
43cd72b9 | 10175 | return TRUE; |
e0001a05 NC |
10176 | } |
10177 | ||
10178 | ||
10179 | static void | |
7fa3d080 BW |
10180 | do_fix_for_final_link (Elf_Internal_Rela *rel, |
10181 | bfd *input_bfd, | |
10182 | asection *input_section, | |
10183 | bfd_byte *contents, | |
10184 | bfd_vma *relocationp) | |
e0001a05 NC |
10185 | { |
10186 | asection *sec; | |
10187 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 | 10188 | reloc_bfd_fix *fix; |
43cd72b9 | 10189 | bfd_vma fixup_diff; |
e0001a05 NC |
10190 | |
10191 | if (r_type == R_XTENSA_NONE) | |
10192 | return; | |
10193 | ||
43cd72b9 BW |
10194 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10195 | if (!fix) | |
e0001a05 NC |
10196 | return; |
10197 | ||
10198 | sec = fix->target_sec; | |
43cd72b9 BW |
10199 | |
10200 | fixup_diff = rel->r_addend; | |
10201 | if (elf_howto_table[fix->src_type].partial_inplace) | |
10202 | { | |
10203 | bfd_vma inplace_val; | |
10204 | BFD_ASSERT (fix->src_offset | |
10205 | < bfd_get_section_limit (input_bfd, input_section)); | |
10206 | inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]); | |
10207 | fixup_diff += inplace_val; | |
10208 | } | |
10209 | ||
e0001a05 NC |
10210 | *relocationp = (sec->output_section->vma |
10211 | + sec->output_offset | |
43cd72b9 | 10212 | + fix->target_offset - fixup_diff); |
e0001a05 NC |
10213 | } |
10214 | ||
10215 | \f | |
10216 | /* Miscellaneous utility functions.... */ | |
10217 | ||
10218 | static asection * | |
f0e6fdb2 | 10219 | elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10220 | { |
f0e6fdb2 BW |
10221 | struct elf_xtensa_link_hash_table *htab; |
10222 | bfd *dynobj; | |
e0001a05 NC |
10223 | char plt_name[10]; |
10224 | ||
10225 | if (chunk == 0) | |
f0e6fdb2 BW |
10226 | { |
10227 | htab = elf_xtensa_hash_table (info); | |
10228 | return htab->splt; | |
10229 | } | |
e0001a05 | 10230 | |
f0e6fdb2 | 10231 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
10232 | sprintf (plt_name, ".plt.%u", chunk); |
10233 | return bfd_get_section_by_name (dynobj, plt_name); | |
10234 | } | |
10235 | ||
10236 | ||
10237 | static asection * | |
f0e6fdb2 | 10238 | elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10239 | { |
f0e6fdb2 BW |
10240 | struct elf_xtensa_link_hash_table *htab; |
10241 | bfd *dynobj; | |
e0001a05 NC |
10242 | char got_name[14]; |
10243 | ||
10244 | if (chunk == 0) | |
f0e6fdb2 BW |
10245 | { |
10246 | htab = elf_xtensa_hash_table (info); | |
10247 | return htab->sgotplt; | |
10248 | } | |
e0001a05 | 10249 | |
f0e6fdb2 | 10250 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
10251 | sprintf (got_name, ".got.plt.%u", chunk); |
10252 | return bfd_get_section_by_name (dynobj, got_name); | |
10253 | } | |
10254 | ||
10255 | ||
10256 | /* Get the input section for a given symbol index. | |
10257 | If the symbol is: | |
10258 | . a section symbol, return the section; | |
10259 | . a common symbol, return the common section; | |
10260 | . an undefined symbol, return the undefined section; | |
10261 | . an indirect symbol, follow the links; | |
10262 | . an absolute value, return the absolute section. */ | |
10263 | ||
10264 | static asection * | |
7fa3d080 | 10265 | get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10266 | { |
10267 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10268 | asection *target_sec = NULL; | |
43cd72b9 | 10269 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10270 | { |
10271 | Elf_Internal_Sym *isymbuf; | |
10272 | unsigned int section_index; | |
10273 | ||
10274 | isymbuf = retrieve_local_syms (abfd); | |
10275 | section_index = isymbuf[r_symndx].st_shndx; | |
10276 | ||
10277 | if (section_index == SHN_UNDEF) | |
10278 | target_sec = bfd_und_section_ptr; | |
e0001a05 NC |
10279 | else if (section_index == SHN_ABS) |
10280 | target_sec = bfd_abs_section_ptr; | |
10281 | else if (section_index == SHN_COMMON) | |
10282 | target_sec = bfd_com_section_ptr; | |
43cd72b9 | 10283 | else |
cb33740c | 10284 | target_sec = bfd_section_from_elf_index (abfd, section_index); |
e0001a05 NC |
10285 | } |
10286 | else | |
10287 | { | |
10288 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10289 | struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx]; | |
10290 | ||
10291 | while (h->root.type == bfd_link_hash_indirect | |
10292 | || h->root.type == bfd_link_hash_warning) | |
10293 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10294 | ||
10295 | switch (h->root.type) | |
10296 | { | |
10297 | case bfd_link_hash_defined: | |
10298 | case bfd_link_hash_defweak: | |
10299 | target_sec = h->root.u.def.section; | |
10300 | break; | |
10301 | case bfd_link_hash_common: | |
10302 | target_sec = bfd_com_section_ptr; | |
10303 | break; | |
10304 | case bfd_link_hash_undefined: | |
10305 | case bfd_link_hash_undefweak: | |
10306 | target_sec = bfd_und_section_ptr; | |
10307 | break; | |
10308 | default: /* New indirect warning. */ | |
10309 | target_sec = bfd_und_section_ptr; | |
10310 | break; | |
10311 | } | |
10312 | } | |
10313 | return target_sec; | |
10314 | } | |
10315 | ||
10316 | ||
10317 | static struct elf_link_hash_entry * | |
7fa3d080 | 10318 | get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10319 | { |
10320 | unsigned long indx; | |
10321 | struct elf_link_hash_entry *h; | |
10322 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10323 | ||
10324 | if (r_symndx < symtab_hdr->sh_info) | |
10325 | return NULL; | |
43cd72b9 | 10326 | |
e0001a05 NC |
10327 | indx = r_symndx - symtab_hdr->sh_info; |
10328 | h = elf_sym_hashes (abfd)[indx]; | |
10329 | while (h->root.type == bfd_link_hash_indirect | |
10330 | || h->root.type == bfd_link_hash_warning) | |
10331 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10332 | return h; | |
10333 | } | |
10334 | ||
10335 | ||
10336 | /* Get the section-relative offset for a symbol number. */ | |
10337 | ||
10338 | static bfd_vma | |
7fa3d080 | 10339 | get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10340 | { |
10341 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10342 | bfd_vma offset = 0; | |
10343 | ||
43cd72b9 | 10344 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10345 | { |
10346 | Elf_Internal_Sym *isymbuf; | |
10347 | isymbuf = retrieve_local_syms (abfd); | |
10348 | offset = isymbuf[r_symndx].st_value; | |
10349 | } | |
10350 | else | |
10351 | { | |
10352 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10353 | struct elf_link_hash_entry *h = | |
10354 | elf_sym_hashes (abfd)[indx]; | |
10355 | ||
10356 | while (h->root.type == bfd_link_hash_indirect | |
10357 | || h->root.type == bfd_link_hash_warning) | |
10358 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10359 | if (h->root.type == bfd_link_hash_defined | |
10360 | || h->root.type == bfd_link_hash_defweak) | |
10361 | offset = h->root.u.def.value; | |
10362 | } | |
10363 | return offset; | |
10364 | } | |
10365 | ||
10366 | ||
10367 | static bfd_boolean | |
7fa3d080 | 10368 | is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel) |
43cd72b9 BW |
10369 | { |
10370 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
10371 | struct elf_link_hash_entry *h; | |
10372 | ||
10373 | h = get_elf_r_symndx_hash_entry (abfd, r_symndx); | |
10374 | if (h && h->root.type == bfd_link_hash_defweak) | |
10375 | return TRUE; | |
10376 | return FALSE; | |
10377 | } | |
10378 | ||
10379 | ||
10380 | static bfd_boolean | |
7fa3d080 BW |
10381 | pcrel_reloc_fits (xtensa_opcode opc, |
10382 | int opnd, | |
10383 | bfd_vma self_address, | |
10384 | bfd_vma dest_address) | |
e0001a05 | 10385 | { |
43cd72b9 BW |
10386 | xtensa_isa isa = xtensa_default_isa; |
10387 | uint32 valp = dest_address; | |
10388 | if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address) | |
10389 | || xtensa_operand_encode (isa, opc, opnd, &valp)) | |
10390 | return FALSE; | |
10391 | return TRUE; | |
e0001a05 NC |
10392 | } |
10393 | ||
10394 | ||
10395 | static bfd_boolean | |
7fa3d080 | 10396 | xtensa_is_property_section (asection *sec) |
e0001a05 | 10397 | { |
1d25768e BW |
10398 | if (xtensa_is_insntable_section (sec) |
10399 | || xtensa_is_littable_section (sec) | |
10400 | || xtensa_is_proptable_section (sec)) | |
b614a702 | 10401 | return TRUE; |
e901de89 | 10402 | |
1d25768e BW |
10403 | return FALSE; |
10404 | } | |
10405 | ||
10406 | ||
10407 | static bfd_boolean | |
10408 | xtensa_is_insntable_section (asection *sec) | |
10409 | { | |
10410 | if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME) | |
10411 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.x.")) | |
e901de89 BW |
10412 | return TRUE; |
10413 | ||
e901de89 BW |
10414 | return FALSE; |
10415 | } | |
10416 | ||
10417 | ||
10418 | static bfd_boolean | |
7fa3d080 | 10419 | xtensa_is_littable_section (asection *sec) |
e901de89 | 10420 | { |
1d25768e BW |
10421 | if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME) |
10422 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.p.")) | |
b614a702 | 10423 | return TRUE; |
e901de89 | 10424 | |
1d25768e BW |
10425 | return FALSE; |
10426 | } | |
10427 | ||
10428 | ||
10429 | static bfd_boolean | |
10430 | xtensa_is_proptable_section (asection *sec) | |
10431 | { | |
10432 | if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME) | |
10433 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop.")) | |
e901de89 | 10434 | return TRUE; |
e0001a05 | 10435 | |
e901de89 | 10436 | return FALSE; |
e0001a05 NC |
10437 | } |
10438 | ||
10439 | ||
43cd72b9 | 10440 | static int |
7fa3d080 | 10441 | internal_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 10442 | { |
43cd72b9 BW |
10443 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; |
10444 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10445 | ||
10446 | if (a->r_offset != b->r_offset) | |
10447 | return (a->r_offset - b->r_offset); | |
10448 | ||
10449 | /* We don't need to sort on these criteria for correctness, | |
10450 | but enforcing a more strict ordering prevents unstable qsort | |
10451 | from behaving differently with different implementations. | |
10452 | Without the code below we get correct but different results | |
10453 | on Solaris 2.7 and 2.8. We would like to always produce the | |
10454 | same results no matter the host. */ | |
10455 | ||
10456 | if (a->r_info != b->r_info) | |
10457 | return (a->r_info - b->r_info); | |
10458 | ||
10459 | return (a->r_addend - b->r_addend); | |
e0001a05 NC |
10460 | } |
10461 | ||
10462 | ||
10463 | static int | |
7fa3d080 | 10464 | internal_reloc_matches (const void *ap, const void *bp) |
e0001a05 NC |
10465 | { |
10466 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; | |
10467 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10468 | ||
43cd72b9 BW |
10469 | /* Check if one entry overlaps with the other; this shouldn't happen |
10470 | except when searching for a match. */ | |
e0001a05 NC |
10471 | return (a->r_offset - b->r_offset); |
10472 | } | |
10473 | ||
10474 | ||
74869ac7 BW |
10475 | /* Predicate function used to look up a section in a particular group. */ |
10476 | ||
10477 | static bfd_boolean | |
10478 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
10479 | { | |
10480 | const char *gname = inf; | |
10481 | const char *group_name = elf_group_name (sec); | |
10482 | ||
10483 | return (group_name == gname | |
10484 | || (group_name != NULL | |
10485 | && gname != NULL | |
10486 | && strcmp (group_name, gname) == 0)); | |
10487 | } | |
10488 | ||
10489 | ||
1d25768e BW |
10490 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
10491 | ||
51c8ebc1 BW |
10492 | static char * |
10493 | xtensa_property_section_name (asection *sec, const char *base_name) | |
e0001a05 | 10494 | { |
74869ac7 BW |
10495 | const char *suffix, *group_name; |
10496 | char *prop_sec_name; | |
74869ac7 BW |
10497 | |
10498 | group_name = elf_group_name (sec); | |
10499 | if (group_name) | |
10500 | { | |
10501 | suffix = strrchr (sec->name, '.'); | |
10502 | if (suffix == sec->name) | |
10503 | suffix = 0; | |
10504 | prop_sec_name = (char *) bfd_malloc (strlen (base_name) + 1 | |
10505 | + (suffix ? strlen (suffix) : 0)); | |
10506 | strcpy (prop_sec_name, base_name); | |
10507 | if (suffix) | |
10508 | strcat (prop_sec_name, suffix); | |
10509 | } | |
10510 | else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0) | |
e0001a05 | 10511 | { |
43cd72b9 | 10512 | char *linkonce_kind = 0; |
b614a702 BW |
10513 | |
10514 | if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0) | |
7db48a12 | 10515 | linkonce_kind = "x."; |
b614a702 | 10516 | else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0) |
7db48a12 | 10517 | linkonce_kind = "p."; |
43cd72b9 BW |
10518 | else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0) |
10519 | linkonce_kind = "prop."; | |
e0001a05 | 10520 | else |
b614a702 BW |
10521 | abort (); |
10522 | ||
43cd72b9 BW |
10523 | prop_sec_name = (char *) bfd_malloc (strlen (sec->name) |
10524 | + strlen (linkonce_kind) + 1); | |
b614a702 | 10525 | memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len); |
43cd72b9 | 10526 | strcpy (prop_sec_name + linkonce_len, linkonce_kind); |
b614a702 BW |
10527 | |
10528 | suffix = sec->name + linkonce_len; | |
096c35a7 | 10529 | /* For backward compatibility, replace "t." instead of inserting |
43cd72b9 | 10530 | the new linkonce_kind (but not for "prop" sections). */ |
0112cd26 | 10531 | if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.') |
43cd72b9 BW |
10532 | suffix += 2; |
10533 | strcat (prop_sec_name + linkonce_len, suffix); | |
74869ac7 BW |
10534 | } |
10535 | else | |
10536 | prop_sec_name = strdup (base_name); | |
10537 | ||
51c8ebc1 BW |
10538 | return prop_sec_name; |
10539 | } | |
10540 | ||
10541 | ||
10542 | static asection * | |
10543 | xtensa_get_property_section (asection *sec, const char *base_name) | |
10544 | { | |
10545 | char *prop_sec_name; | |
10546 | asection *prop_sec; | |
10547 | ||
10548 | prop_sec_name = xtensa_property_section_name (sec, base_name); | |
10549 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, | |
10550 | match_section_group, | |
10551 | (void *) elf_group_name (sec)); | |
10552 | free (prop_sec_name); | |
10553 | return prop_sec; | |
10554 | } | |
10555 | ||
10556 | ||
10557 | asection * | |
10558 | xtensa_make_property_section (asection *sec, const char *base_name) | |
10559 | { | |
10560 | char *prop_sec_name; | |
10561 | asection *prop_sec; | |
10562 | ||
74869ac7 | 10563 | /* Check if the section already exists. */ |
51c8ebc1 | 10564 | prop_sec_name = xtensa_property_section_name (sec, base_name); |
74869ac7 BW |
10565 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, |
10566 | match_section_group, | |
51c8ebc1 | 10567 | (void *) elf_group_name (sec)); |
74869ac7 BW |
10568 | /* If not, create it. */ |
10569 | if (! prop_sec) | |
10570 | { | |
10571 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
10572 | flags |= (bfd_get_section_flags (sec->owner, sec) | |
10573 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)); | |
10574 | ||
10575 | prop_sec = bfd_make_section_anyway_with_flags | |
10576 | (sec->owner, strdup (prop_sec_name), flags); | |
10577 | if (! prop_sec) | |
10578 | return 0; | |
b614a702 | 10579 | |
51c8ebc1 | 10580 | elf_group_name (prop_sec) = elf_group_name (sec); |
e0001a05 NC |
10581 | } |
10582 | ||
74869ac7 BW |
10583 | free (prop_sec_name); |
10584 | return prop_sec; | |
e0001a05 NC |
10585 | } |
10586 | ||
43cd72b9 BW |
10587 | |
10588 | flagword | |
7fa3d080 | 10589 | xtensa_get_property_predef_flags (asection *sec) |
43cd72b9 | 10590 | { |
1d25768e | 10591 | if (xtensa_is_insntable_section (sec)) |
43cd72b9 | 10592 | return (XTENSA_PROP_INSN |
99ded152 | 10593 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
10594 | | XTENSA_PROP_INSN_NO_REORDER); |
10595 | ||
10596 | if (xtensa_is_littable_section (sec)) | |
10597 | return (XTENSA_PROP_LITERAL | |
99ded152 | 10598 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
10599 | | XTENSA_PROP_INSN_NO_REORDER); |
10600 | ||
10601 | return 0; | |
10602 | } | |
10603 | ||
e0001a05 NC |
10604 | \f |
10605 | /* Other functions called directly by the linker. */ | |
10606 | ||
10607 | bfd_boolean | |
7fa3d080 BW |
10608 | xtensa_callback_required_dependence (bfd *abfd, |
10609 | asection *sec, | |
10610 | struct bfd_link_info *link_info, | |
10611 | deps_callback_t callback, | |
10612 | void *closure) | |
e0001a05 NC |
10613 | { |
10614 | Elf_Internal_Rela *internal_relocs; | |
10615 | bfd_byte *contents; | |
10616 | unsigned i; | |
10617 | bfd_boolean ok = TRUE; | |
43cd72b9 BW |
10618 | bfd_size_type sec_size; |
10619 | ||
10620 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 NC |
10621 | |
10622 | /* ".plt*" sections have no explicit relocations but they contain L32R | |
10623 | instructions that reference the corresponding ".got.plt*" sections. */ | |
10624 | if ((sec->flags & SEC_LINKER_CREATED) != 0 | |
0112cd26 | 10625 | && CONST_STRNEQ (sec->name, ".plt")) |
e0001a05 NC |
10626 | { |
10627 | asection *sgotplt; | |
10628 | ||
10629 | /* Find the corresponding ".got.plt*" section. */ | |
10630 | if (sec->name[4] == '\0') | |
10631 | sgotplt = bfd_get_section_by_name (sec->owner, ".got.plt"); | |
10632 | else | |
10633 | { | |
10634 | char got_name[14]; | |
10635 | int chunk = 0; | |
10636 | ||
10637 | BFD_ASSERT (sec->name[4] == '.'); | |
10638 | chunk = strtol (&sec->name[5], NULL, 10); | |
10639 | ||
10640 | sprintf (got_name, ".got.plt.%u", chunk); | |
10641 | sgotplt = bfd_get_section_by_name (sec->owner, got_name); | |
10642 | } | |
10643 | BFD_ASSERT (sgotplt); | |
10644 | ||
10645 | /* Assume worst-case offsets: L32R at the very end of the ".plt" | |
10646 | section referencing a literal at the very beginning of | |
10647 | ".got.plt". This is very close to the real dependence, anyway. */ | |
43cd72b9 | 10648 | (*callback) (sec, sec_size, sgotplt, 0, closure); |
e0001a05 NC |
10649 | } |
10650 | ||
13161072 BW |
10651 | /* Only ELF files are supported for Xtensa. Check here to avoid a segfault |
10652 | when building uclibc, which runs "ld -b binary /dev/null". */ | |
10653 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
10654 | return ok; | |
10655 | ||
e0001a05 NC |
10656 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
10657 | link_info->keep_memory); | |
10658 | if (internal_relocs == NULL | |
43cd72b9 | 10659 | || sec->reloc_count == 0) |
e0001a05 NC |
10660 | return ok; |
10661 | ||
10662 | /* Cache the contents for the duration of this scan. */ | |
10663 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 10664 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
10665 | { |
10666 | ok = FALSE; | |
10667 | goto error_return; | |
10668 | } | |
10669 | ||
43cd72b9 BW |
10670 | if (!xtensa_default_isa) |
10671 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 10672 | |
43cd72b9 | 10673 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
10674 | { |
10675 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 | 10676 | if (is_l32r_relocation (abfd, sec, contents, irel)) |
e0001a05 NC |
10677 | { |
10678 | r_reloc l32r_rel; | |
10679 | asection *target_sec; | |
10680 | bfd_vma target_offset; | |
43cd72b9 BW |
10681 | |
10682 | r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size); | |
e0001a05 NC |
10683 | target_sec = NULL; |
10684 | target_offset = 0; | |
10685 | /* L32Rs must be local to the input file. */ | |
10686 | if (r_reloc_is_defined (&l32r_rel)) | |
10687 | { | |
10688 | target_sec = r_reloc_get_section (&l32r_rel); | |
43cd72b9 | 10689 | target_offset = l32r_rel.target_offset; |
e0001a05 NC |
10690 | } |
10691 | (*callback) (sec, irel->r_offset, target_sec, target_offset, | |
10692 | closure); | |
10693 | } | |
10694 | } | |
10695 | ||
10696 | error_return: | |
10697 | release_internal_relocs (sec, internal_relocs); | |
10698 | release_contents (sec, contents); | |
10699 | return ok; | |
10700 | } | |
10701 | ||
2f89ff8d L |
10702 | /* The default literal sections should always be marked as "code" (i.e., |
10703 | SHF_EXECINSTR). This is particularly important for the Linux kernel | |
10704 | module loader so that the literals are not placed after the text. */ | |
b35d266b | 10705 | static const struct bfd_elf_special_section elf_xtensa_special_sections[] = |
2f89ff8d | 10706 | { |
0112cd26 NC |
10707 | { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
10708 | { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
10709 | { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2caa7ca0 | 10710 | { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 }, |
0112cd26 | 10711 | { NULL, 0, 0, 0, 0 } |
7f4d3958 | 10712 | }; |
e0001a05 NC |
10713 | \f |
10714 | #ifndef ELF_ARCH | |
10715 | #define TARGET_LITTLE_SYM bfd_elf32_xtensa_le_vec | |
10716 | #define TARGET_LITTLE_NAME "elf32-xtensa-le" | |
10717 | #define TARGET_BIG_SYM bfd_elf32_xtensa_be_vec | |
10718 | #define TARGET_BIG_NAME "elf32-xtensa-be" | |
10719 | #define ELF_ARCH bfd_arch_xtensa | |
10720 | ||
4af0a1d8 BW |
10721 | #define ELF_MACHINE_CODE EM_XTENSA |
10722 | #define ELF_MACHINE_ALT1 EM_XTENSA_OLD | |
e0001a05 NC |
10723 | |
10724 | #if XCHAL_HAVE_MMU | |
10725 | #define ELF_MAXPAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE) | |
10726 | #else /* !XCHAL_HAVE_MMU */ | |
10727 | #define ELF_MAXPAGESIZE 1 | |
10728 | #endif /* !XCHAL_HAVE_MMU */ | |
10729 | #endif /* ELF_ARCH */ | |
10730 | ||
10731 | #define elf_backend_can_gc_sections 1 | |
10732 | #define elf_backend_can_refcount 1 | |
10733 | #define elf_backend_plt_readonly 1 | |
10734 | #define elf_backend_got_header_size 4 | |
10735 | #define elf_backend_want_dynbss 0 | |
10736 | #define elf_backend_want_got_plt 1 | |
10737 | ||
10738 | #define elf_info_to_howto elf_xtensa_info_to_howto_rela | |
10739 | ||
28dbbc02 BW |
10740 | #define bfd_elf32_mkobject elf_xtensa_mkobject |
10741 | ||
e0001a05 NC |
10742 | #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data |
10743 | #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook | |
10744 | #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data | |
10745 | #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section | |
10746 | #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup | |
157090f7 AM |
10747 | #define bfd_elf32_bfd_reloc_name_lookup \ |
10748 | elf_xtensa_reloc_name_lookup | |
e0001a05 | 10749 | #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags |
f0e6fdb2 | 10750 | #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create |
e0001a05 NC |
10751 | |
10752 | #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol | |
10753 | #define elf_backend_check_relocs elf_xtensa_check_relocs | |
e0001a05 NC |
10754 | #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections |
10755 | #define elf_backend_discard_info elf_xtensa_discard_info | |
10756 | #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs | |
10757 | #define elf_backend_final_write_processing elf_xtensa_final_write_processing | |
10758 | #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections | |
10759 | #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol | |
10760 | #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook | |
10761 | #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook | |
10762 | #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus | |
10763 | #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo | |
95147441 | 10764 | #define elf_backend_hide_symbol elf_xtensa_hide_symbol |
e0001a05 NC |
10765 | #define elf_backend_object_p elf_xtensa_object_p |
10766 | #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class | |
10767 | #define elf_backend_relocate_section elf_xtensa_relocate_section | |
10768 | #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections | |
28dbbc02 | 10769 | #define elf_backend_always_size_sections elf_xtensa_always_size_sections |
74541ad4 AM |
10770 | #define elf_backend_omit_section_dynsym \ |
10771 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
29ef7005 | 10772 | #define elf_backend_special_sections elf_xtensa_special_sections |
a77dc2cc | 10773 | #define elf_backend_action_discarded elf_xtensa_action_discarded |
28dbbc02 | 10774 | #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol |
e0001a05 NC |
10775 | |
10776 | #include "elf32-target.h" |