Commit | Line | Data |
---|---|---|
e0001a05 | 1 | /* Xtensa-specific support for 32-bit ELF. |
f0e6fdb2 | 2 | Copyright 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
e0001a05 NC |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public License as | |
cd123cb7 | 8 | published by the Free Software Foundation; either version 3 of the |
e0001a05 NC |
9 | License, or (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
3e110533 | 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
53e09e0a | 19 | 02110-1301, USA. */ |
e0001a05 | 20 | |
e0001a05 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
e0001a05 | 23 | |
e0001a05 | 24 | #include <stdarg.h> |
e0001a05 NC |
25 | #include <strings.h> |
26 | ||
27 | #include "bfdlink.h" | |
28 | #include "libbfd.h" | |
29 | #include "elf-bfd.h" | |
30 | #include "elf/xtensa.h" | |
31 | #include "xtensa-isa.h" | |
32 | #include "xtensa-config.h" | |
33 | ||
43cd72b9 BW |
34 | #define XTENSA_NO_NOP_REMOVAL 0 |
35 | ||
e0001a05 NC |
36 | /* Local helper functions. */ |
37 | ||
f0e6fdb2 | 38 | static bfd_boolean add_extra_plt_sections (struct bfd_link_info *, int); |
2db662be | 39 | static char *vsprint_msg (const char *, const char *, int, ...) ATTRIBUTE_PRINTF(2,4); |
e0001a05 | 40 | static bfd_reloc_status_type bfd_elf_xtensa_reloc |
7fa3d080 | 41 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
43cd72b9 | 42 | static bfd_boolean do_fix_for_relocatable_link |
7fa3d080 | 43 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *); |
e0001a05 | 44 | static void do_fix_for_final_link |
7fa3d080 | 45 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *, bfd_vma *); |
e0001a05 NC |
46 | |
47 | /* Local functions to handle Xtensa configurability. */ | |
48 | ||
7fa3d080 BW |
49 | static bfd_boolean is_indirect_call_opcode (xtensa_opcode); |
50 | static bfd_boolean is_direct_call_opcode (xtensa_opcode); | |
51 | static bfd_boolean is_windowed_call_opcode (xtensa_opcode); | |
52 | static xtensa_opcode get_const16_opcode (void); | |
53 | static xtensa_opcode get_l32r_opcode (void); | |
54 | static bfd_vma l32r_offset (bfd_vma, bfd_vma); | |
55 | static int get_relocation_opnd (xtensa_opcode, int); | |
56 | static int get_relocation_slot (int); | |
e0001a05 | 57 | static xtensa_opcode get_relocation_opcode |
7fa3d080 | 58 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
e0001a05 | 59 | static bfd_boolean is_l32r_relocation |
7fa3d080 BW |
60 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
61 | static bfd_boolean is_alt_relocation (int); | |
62 | static bfd_boolean is_operand_relocation (int); | |
43cd72b9 | 63 | static bfd_size_type insn_decode_len |
7fa3d080 | 64 | (bfd_byte *, bfd_size_type, bfd_size_type); |
43cd72b9 | 65 | static xtensa_opcode insn_decode_opcode |
7fa3d080 | 66 | (bfd_byte *, bfd_size_type, bfd_size_type, int); |
43cd72b9 | 67 | static bfd_boolean check_branch_target_aligned |
7fa3d080 | 68 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
43cd72b9 | 69 | static bfd_boolean check_loop_aligned |
7fa3d080 BW |
70 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
71 | static bfd_boolean check_branch_target_aligned_address (bfd_vma, int); | |
43cd72b9 | 72 | static bfd_size_type get_asm_simplify_size |
7fa3d080 | 73 | (bfd_byte *, bfd_size_type, bfd_size_type); |
e0001a05 NC |
74 | |
75 | /* Functions for link-time code simplifications. */ | |
76 | ||
43cd72b9 | 77 | static bfd_reloc_status_type elf_xtensa_do_asm_simplify |
7fa3d080 | 78 | (bfd_byte *, bfd_vma, bfd_vma, char **); |
e0001a05 | 79 | static bfd_reloc_status_type contract_asm_expansion |
7fa3d080 BW |
80 | (bfd_byte *, bfd_vma, Elf_Internal_Rela *, char **); |
81 | static xtensa_opcode swap_callx_for_call_opcode (xtensa_opcode); | |
82 | static xtensa_opcode get_expanded_call_opcode (bfd_byte *, int, bfd_boolean *); | |
e0001a05 NC |
83 | |
84 | /* Access to internal relocations, section contents and symbols. */ | |
85 | ||
86 | static Elf_Internal_Rela *retrieve_internal_relocs | |
7fa3d080 BW |
87 | (bfd *, asection *, bfd_boolean); |
88 | static void pin_internal_relocs (asection *, Elf_Internal_Rela *); | |
89 | static void release_internal_relocs (asection *, Elf_Internal_Rela *); | |
90 | static bfd_byte *retrieve_contents (bfd *, asection *, bfd_boolean); | |
91 | static void pin_contents (asection *, bfd_byte *); | |
92 | static void release_contents (asection *, bfd_byte *); | |
93 | static Elf_Internal_Sym *retrieve_local_syms (bfd *); | |
e0001a05 NC |
94 | |
95 | /* Miscellaneous utility functions. */ | |
96 | ||
f0e6fdb2 BW |
97 | static asection *elf_xtensa_get_plt_section (struct bfd_link_info *, int); |
98 | static asection *elf_xtensa_get_gotplt_section (struct bfd_link_info *, int); | |
7fa3d080 | 99 | static asection *get_elf_r_symndx_section (bfd *, unsigned long); |
e0001a05 | 100 | static struct elf_link_hash_entry *get_elf_r_symndx_hash_entry |
7fa3d080 BW |
101 | (bfd *, unsigned long); |
102 | static bfd_vma get_elf_r_symndx_offset (bfd *, unsigned long); | |
103 | static bfd_boolean is_reloc_sym_weak (bfd *, Elf_Internal_Rela *); | |
104 | static bfd_boolean pcrel_reloc_fits (xtensa_opcode, int, bfd_vma, bfd_vma); | |
105 | static bfd_boolean xtensa_is_property_section (asection *); | |
1d25768e | 106 | static bfd_boolean xtensa_is_insntable_section (asection *); |
7fa3d080 | 107 | static bfd_boolean xtensa_is_littable_section (asection *); |
1d25768e | 108 | static bfd_boolean xtensa_is_proptable_section (asection *); |
7fa3d080 BW |
109 | static int internal_reloc_compare (const void *, const void *); |
110 | static int internal_reloc_matches (const void *, const void *); | |
74869ac7 | 111 | extern asection *xtensa_get_property_section (asection *, const char *); |
7fa3d080 | 112 | static flagword xtensa_get_property_predef_flags (asection *); |
e0001a05 NC |
113 | |
114 | /* Other functions called directly by the linker. */ | |
115 | ||
116 | typedef void (*deps_callback_t) | |
7fa3d080 | 117 | (asection *, bfd_vma, asection *, bfd_vma, void *); |
e0001a05 | 118 | extern bfd_boolean xtensa_callback_required_dependence |
7fa3d080 | 119 | (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *); |
e0001a05 NC |
120 | |
121 | ||
43cd72b9 BW |
122 | /* Globally visible flag for choosing size optimization of NOP removal |
123 | instead of branch-target-aware minimization for NOP removal. | |
124 | When nonzero, narrow all instructions and remove all NOPs possible | |
125 | around longcall expansions. */ | |
7fa3d080 | 126 | |
43cd72b9 BW |
127 | int elf32xtensa_size_opt; |
128 | ||
129 | ||
130 | /* The "new_section_hook" is used to set up a per-section | |
131 | "xtensa_relax_info" data structure with additional information used | |
132 | during relaxation. */ | |
e0001a05 | 133 | |
7fa3d080 | 134 | typedef struct xtensa_relax_info_struct xtensa_relax_info; |
e0001a05 | 135 | |
43cd72b9 | 136 | |
43cd72b9 BW |
137 | /* The GNU tools do not easily allow extending interfaces to pass around |
138 | the pointer to the Xtensa ISA information, so instead we add a global | |
139 | variable here (in BFD) that can be used by any of the tools that need | |
140 | this information. */ | |
141 | ||
142 | xtensa_isa xtensa_default_isa; | |
143 | ||
144 | ||
e0001a05 NC |
145 | /* When this is true, relocations may have been modified to refer to |
146 | symbols from other input files. The per-section list of "fix" | |
147 | records needs to be checked when resolving relocations. */ | |
148 | ||
149 | static bfd_boolean relaxing_section = FALSE; | |
150 | ||
43cd72b9 BW |
151 | /* When this is true, during final links, literals that cannot be |
152 | coalesced and their relocations may be moved to other sections. */ | |
153 | ||
154 | int elf32xtensa_no_literal_movement = 1; | |
155 | ||
e0001a05 NC |
156 | \f |
157 | static reloc_howto_type elf_howto_table[] = | |
158 | { | |
159 | HOWTO (R_XTENSA_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
160 | bfd_elf_xtensa_reloc, "R_XTENSA_NONE", | |
e5f131d1 | 161 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
162 | HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
163 | bfd_elf_xtensa_reloc, "R_XTENSA_32", | |
164 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
e5f131d1 | 165 | |
e0001a05 NC |
166 | /* Replace a 32-bit value with a value from the runtime linker (only |
167 | used by linker-generated stub functions). The r_addend value is | |
168 | special: 1 means to substitute a pointer to the runtime linker's | |
169 | dynamic resolver function; 2 means to substitute the link map for | |
170 | the shared object. */ | |
171 | HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
e5f131d1 BW |
172 | NULL, "R_XTENSA_RTLD", FALSE, 0, 0, FALSE), |
173 | ||
e0001a05 NC |
174 | HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
175 | bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT", | |
e5f131d1 | 176 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
177 | HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
178 | bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT", | |
e5f131d1 | 179 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
180 | HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
181 | bfd_elf_generic_reloc, "R_XTENSA_RELATIVE", | |
e5f131d1 | 182 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
183 | HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
184 | bfd_elf_xtensa_reloc, "R_XTENSA_PLT", | |
e5f131d1 BW |
185 | FALSE, 0, 0xffffffff, FALSE), |
186 | ||
e0001a05 | 187 | EMPTY_HOWTO (7), |
e5f131d1 BW |
188 | |
189 | /* Old relocations for backward compatibility. */ | |
e0001a05 | 190 | HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 191 | bfd_elf_xtensa_reloc, "R_XTENSA_OP0", FALSE, 0, 0, TRUE), |
e0001a05 | 192 | HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 193 | bfd_elf_xtensa_reloc, "R_XTENSA_OP1", FALSE, 0, 0, TRUE), |
e0001a05 | 194 | HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 BW |
195 | bfd_elf_xtensa_reloc, "R_XTENSA_OP2", FALSE, 0, 0, TRUE), |
196 | ||
e0001a05 NC |
197 | /* Assembly auto-expansion. */ |
198 | HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 199 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND", FALSE, 0, 0, TRUE), |
e0001a05 NC |
200 | /* Relax assembly auto-expansion. */ |
201 | HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 BW |
202 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY", FALSE, 0, 0, TRUE), |
203 | ||
e0001a05 NC |
204 | EMPTY_HOWTO (13), |
205 | EMPTY_HOWTO (14), | |
e5f131d1 | 206 | |
e0001a05 NC |
207 | /* GNU extension to record C++ vtable hierarchy. */ |
208 | HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
209 | NULL, "R_XTENSA_GNU_VTINHERIT", | |
e5f131d1 | 210 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
211 | /* GNU extension to record C++ vtable member usage. */ |
212 | HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
213 | _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY", | |
e5f131d1 | 214 | FALSE, 0, 0, FALSE), |
43cd72b9 BW |
215 | |
216 | /* Relocations for supporting difference of symbols. */ | |
217 | HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
e5f131d1 | 218 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE), |
43cd72b9 | 219 | HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
e5f131d1 | 220 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE), |
43cd72b9 | 221 | HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
e5f131d1 | 222 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE), |
43cd72b9 BW |
223 | |
224 | /* General immediate operand relocations. */ | |
225 | HOWTO (R_XTENSA_SLOT0_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 226 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 227 | HOWTO (R_XTENSA_SLOT1_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 228 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 229 | HOWTO (R_XTENSA_SLOT2_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 230 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 231 | HOWTO (R_XTENSA_SLOT3_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 232 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 233 | HOWTO (R_XTENSA_SLOT4_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 234 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 235 | HOWTO (R_XTENSA_SLOT5_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 236 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 237 | HOWTO (R_XTENSA_SLOT6_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 238 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 239 | HOWTO (R_XTENSA_SLOT7_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 240 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 241 | HOWTO (R_XTENSA_SLOT8_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 242 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 243 | HOWTO (R_XTENSA_SLOT9_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 244 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 245 | HOWTO (R_XTENSA_SLOT10_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 246 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 247 | HOWTO (R_XTENSA_SLOT11_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 248 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 249 | HOWTO (R_XTENSA_SLOT12_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 250 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 251 | HOWTO (R_XTENSA_SLOT13_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 252 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 253 | HOWTO (R_XTENSA_SLOT14_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 254 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_OP", FALSE, 0, 0, TRUE), |
43cd72b9 BW |
255 | |
256 | /* "Alternate" relocations. The meaning of these is opcode-specific. */ | |
257 | HOWTO (R_XTENSA_SLOT0_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 258 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 259 | HOWTO (R_XTENSA_SLOT1_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 260 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 261 | HOWTO (R_XTENSA_SLOT2_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 262 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 263 | HOWTO (R_XTENSA_SLOT3_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 264 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 265 | HOWTO (R_XTENSA_SLOT4_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 266 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 267 | HOWTO (R_XTENSA_SLOT5_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 268 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 269 | HOWTO (R_XTENSA_SLOT6_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 270 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 271 | HOWTO (R_XTENSA_SLOT7_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 272 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 273 | HOWTO (R_XTENSA_SLOT8_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 274 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 275 | HOWTO (R_XTENSA_SLOT9_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 276 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 277 | HOWTO (R_XTENSA_SLOT10_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 278 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 279 | HOWTO (R_XTENSA_SLOT11_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 280 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 281 | HOWTO (R_XTENSA_SLOT12_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 282 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 283 | HOWTO (R_XTENSA_SLOT13_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 284 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 285 | HOWTO (R_XTENSA_SLOT14_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 286 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_ALT", FALSE, 0, 0, TRUE), |
e0001a05 NC |
287 | }; |
288 | ||
43cd72b9 | 289 | #if DEBUG_GEN_RELOC |
e0001a05 NC |
290 | #define TRACE(str) \ |
291 | fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str) | |
292 | #else | |
293 | #define TRACE(str) | |
294 | #endif | |
295 | ||
296 | static reloc_howto_type * | |
7fa3d080 BW |
297 | elf_xtensa_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
298 | bfd_reloc_code_real_type code) | |
e0001a05 NC |
299 | { |
300 | switch (code) | |
301 | { | |
302 | case BFD_RELOC_NONE: | |
303 | TRACE ("BFD_RELOC_NONE"); | |
304 | return &elf_howto_table[(unsigned) R_XTENSA_NONE ]; | |
305 | ||
306 | case BFD_RELOC_32: | |
307 | TRACE ("BFD_RELOC_32"); | |
308 | return &elf_howto_table[(unsigned) R_XTENSA_32 ]; | |
309 | ||
43cd72b9 BW |
310 | case BFD_RELOC_XTENSA_DIFF8: |
311 | TRACE ("BFD_RELOC_XTENSA_DIFF8"); | |
312 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF8 ]; | |
313 | ||
314 | case BFD_RELOC_XTENSA_DIFF16: | |
315 | TRACE ("BFD_RELOC_XTENSA_DIFF16"); | |
316 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF16 ]; | |
317 | ||
318 | case BFD_RELOC_XTENSA_DIFF32: | |
319 | TRACE ("BFD_RELOC_XTENSA_DIFF32"); | |
320 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF32 ]; | |
321 | ||
e0001a05 NC |
322 | case BFD_RELOC_XTENSA_RTLD: |
323 | TRACE ("BFD_RELOC_XTENSA_RTLD"); | |
324 | return &elf_howto_table[(unsigned) R_XTENSA_RTLD ]; | |
325 | ||
326 | case BFD_RELOC_XTENSA_GLOB_DAT: | |
327 | TRACE ("BFD_RELOC_XTENSA_GLOB_DAT"); | |
328 | return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ]; | |
329 | ||
330 | case BFD_RELOC_XTENSA_JMP_SLOT: | |
331 | TRACE ("BFD_RELOC_XTENSA_JMP_SLOT"); | |
332 | return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ]; | |
333 | ||
334 | case BFD_RELOC_XTENSA_RELATIVE: | |
335 | TRACE ("BFD_RELOC_XTENSA_RELATIVE"); | |
336 | return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ]; | |
337 | ||
338 | case BFD_RELOC_XTENSA_PLT: | |
339 | TRACE ("BFD_RELOC_XTENSA_PLT"); | |
340 | return &elf_howto_table[(unsigned) R_XTENSA_PLT ]; | |
341 | ||
342 | case BFD_RELOC_XTENSA_OP0: | |
343 | TRACE ("BFD_RELOC_XTENSA_OP0"); | |
344 | return &elf_howto_table[(unsigned) R_XTENSA_OP0 ]; | |
345 | ||
346 | case BFD_RELOC_XTENSA_OP1: | |
347 | TRACE ("BFD_RELOC_XTENSA_OP1"); | |
348 | return &elf_howto_table[(unsigned) R_XTENSA_OP1 ]; | |
349 | ||
350 | case BFD_RELOC_XTENSA_OP2: | |
351 | TRACE ("BFD_RELOC_XTENSA_OP2"); | |
352 | return &elf_howto_table[(unsigned) R_XTENSA_OP2 ]; | |
353 | ||
354 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
355 | TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND"); | |
356 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ]; | |
357 | ||
358 | case BFD_RELOC_XTENSA_ASM_SIMPLIFY: | |
359 | TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY"); | |
360 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ]; | |
361 | ||
362 | case BFD_RELOC_VTABLE_INHERIT: | |
363 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
364 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ]; | |
365 | ||
366 | case BFD_RELOC_VTABLE_ENTRY: | |
367 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
368 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ]; | |
369 | ||
370 | default: | |
43cd72b9 BW |
371 | if (code >= BFD_RELOC_XTENSA_SLOT0_OP |
372 | && code <= BFD_RELOC_XTENSA_SLOT14_OP) | |
373 | { | |
374 | unsigned n = (R_XTENSA_SLOT0_OP + | |
375 | (code - BFD_RELOC_XTENSA_SLOT0_OP)); | |
376 | return &elf_howto_table[n]; | |
377 | } | |
378 | ||
379 | if (code >= BFD_RELOC_XTENSA_SLOT0_ALT | |
380 | && code <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
381 | { | |
382 | unsigned n = (R_XTENSA_SLOT0_ALT + | |
383 | (code - BFD_RELOC_XTENSA_SLOT0_ALT)); | |
384 | return &elf_howto_table[n]; | |
385 | } | |
386 | ||
e0001a05 NC |
387 | break; |
388 | } | |
389 | ||
390 | TRACE ("Unknown"); | |
391 | return NULL; | |
392 | } | |
393 | ||
157090f7 AM |
394 | static reloc_howto_type * |
395 | elf_xtensa_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
396 | const char *r_name) | |
397 | { | |
398 | unsigned int i; | |
399 | ||
400 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
401 | if (elf_howto_table[i].name != NULL | |
402 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
403 | return &elf_howto_table[i]; | |
404 | ||
405 | return NULL; | |
406 | } | |
407 | ||
e0001a05 NC |
408 | |
409 | /* Given an ELF "rela" relocation, find the corresponding howto and record | |
410 | it in the BFD internal arelent representation of the relocation. */ | |
411 | ||
412 | static void | |
7fa3d080 BW |
413 | elf_xtensa_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
414 | arelent *cache_ptr, | |
415 | Elf_Internal_Rela *dst) | |
e0001a05 NC |
416 | { |
417 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
418 | ||
419 | BFD_ASSERT (r_type < (unsigned int) R_XTENSA_max); | |
420 | cache_ptr->howto = &elf_howto_table[r_type]; | |
421 | } | |
422 | ||
423 | \f | |
424 | /* Functions for the Xtensa ELF linker. */ | |
425 | ||
426 | /* The name of the dynamic interpreter. This is put in the .interp | |
427 | section. */ | |
428 | ||
429 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so" | |
430 | ||
431 | /* The size in bytes of an entry in the procedure linkage table. | |
432 | (This does _not_ include the space for the literals associated with | |
433 | the PLT entry.) */ | |
434 | ||
435 | #define PLT_ENTRY_SIZE 16 | |
436 | ||
437 | /* For _really_ large PLTs, we may need to alternate between literals | |
438 | and code to keep the literals within the 256K range of the L32R | |
439 | instructions in the code. It's unlikely that anyone would ever need | |
440 | such a big PLT, but an arbitrary limit on the PLT size would be bad. | |
441 | Thus, we split the PLT into chunks. Since there's very little | |
442 | overhead (2 extra literals) for each chunk, the chunk size is kept | |
443 | small so that the code for handling multiple chunks get used and | |
444 | tested regularly. With 254 entries, there are 1K of literals for | |
445 | each chunk, and that seems like a nice round number. */ | |
446 | ||
447 | #define PLT_ENTRIES_PER_CHUNK 254 | |
448 | ||
449 | /* PLT entries are actually used as stub functions for lazy symbol | |
450 | resolution. Once the symbol is resolved, the stub function is never | |
451 | invoked. Note: the 32-byte frame size used here cannot be changed | |
452 | without a corresponding change in the runtime linker. */ | |
453 | ||
454 | static const bfd_byte elf_xtensa_be_plt_entry[PLT_ENTRY_SIZE] = | |
455 | { | |
456 | 0x6c, 0x10, 0x04, /* entry sp, 32 */ | |
457 | 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
458 | 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
459 | 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
460 | 0x0a, 0x80, 0x00, /* jx a8 */ | |
461 | 0 /* unused */ | |
462 | }; | |
463 | ||
464 | static const bfd_byte elf_xtensa_le_plt_entry[PLT_ENTRY_SIZE] = | |
465 | { | |
466 | 0x36, 0x41, 0x00, /* entry sp, 32 */ | |
467 | 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
468 | 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
469 | 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
470 | 0xa0, 0x08, 0x00, /* jx a8 */ | |
471 | 0 /* unused */ | |
472 | }; | |
473 | ||
f0e6fdb2 BW |
474 | /* Xtensa ELF linker hash table. */ |
475 | ||
476 | struct elf_xtensa_link_hash_table | |
477 | { | |
478 | struct elf_link_hash_table elf; | |
479 | ||
480 | /* Short-cuts to get to dynamic linker sections. */ | |
481 | asection *sgot; | |
482 | asection *sgotplt; | |
483 | asection *srelgot; | |
484 | asection *splt; | |
485 | asection *srelplt; | |
486 | asection *sgotloc; | |
487 | asection *spltlittbl; | |
488 | ||
489 | /* Total count of PLT relocations seen during check_relocs. | |
490 | The actual PLT code must be split into multiple sections and all | |
491 | the sections have to be created before size_dynamic_sections, | |
492 | where we figure out the exact number of PLT entries that will be | |
493 | needed. It is OK if this count is an overestimate, e.g., some | |
494 | relocations may be removed by GC. */ | |
495 | int plt_reloc_count; | |
496 | }; | |
497 | ||
498 | /* Get the Xtensa ELF linker hash table from a link_info structure. */ | |
499 | ||
500 | #define elf_xtensa_hash_table(p) \ | |
501 | ((struct elf_xtensa_link_hash_table *) ((p)->hash)) | |
502 | ||
503 | /* Create an Xtensa ELF linker hash table. */ | |
504 | ||
505 | static struct bfd_link_hash_table * | |
506 | elf_xtensa_link_hash_table_create (bfd *abfd) | |
507 | { | |
508 | struct elf_xtensa_link_hash_table *ret; | |
509 | bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table); | |
510 | ||
511 | ret = bfd_malloc (amt); | |
512 | if (ret == NULL) | |
513 | return NULL; | |
514 | ||
515 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
516 | _bfd_elf_link_hash_newfunc, | |
517 | sizeof (struct elf_link_hash_entry))) | |
518 | { | |
519 | free (ret); | |
520 | return NULL; | |
521 | } | |
522 | ||
523 | ret->sgot = NULL; | |
524 | ret->sgotplt = NULL; | |
525 | ret->srelgot = NULL; | |
526 | ret->splt = NULL; | |
527 | ret->srelplt = NULL; | |
528 | ret->sgotloc = NULL; | |
529 | ret->spltlittbl = NULL; | |
530 | ||
531 | ret->plt_reloc_count = 0; | |
532 | ||
533 | return &ret->elf.root; | |
534 | } | |
571b5725 BW |
535 | |
536 | static inline bfd_boolean | |
4608f3d9 | 537 | elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h, |
7fa3d080 | 538 | struct bfd_link_info *info) |
571b5725 BW |
539 | { |
540 | /* Check if we should do dynamic things to this symbol. The | |
541 | "ignore_protected" argument need not be set, because Xtensa code | |
542 | does not require special handling of STV_PROTECTED to make function | |
543 | pointer comparisons work properly. The PLT addresses are never | |
544 | used for function pointers. */ | |
545 | ||
546 | return _bfd_elf_dynamic_symbol_p (h, info, 0); | |
547 | } | |
548 | ||
e0001a05 NC |
549 | \f |
550 | static int | |
7fa3d080 | 551 | property_table_compare (const void *ap, const void *bp) |
e0001a05 NC |
552 | { |
553 | const property_table_entry *a = (const property_table_entry *) ap; | |
554 | const property_table_entry *b = (const property_table_entry *) bp; | |
555 | ||
43cd72b9 BW |
556 | if (a->address == b->address) |
557 | { | |
43cd72b9 BW |
558 | if (a->size != b->size) |
559 | return (a->size - b->size); | |
560 | ||
561 | if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN)) | |
562 | return ((b->flags & XTENSA_PROP_ALIGN) | |
563 | - (a->flags & XTENSA_PROP_ALIGN)); | |
564 | ||
565 | if ((a->flags & XTENSA_PROP_ALIGN) | |
566 | && (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
567 | != GET_XTENSA_PROP_ALIGNMENT (b->flags))) | |
568 | return (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
569 | - GET_XTENSA_PROP_ALIGNMENT (b->flags)); | |
570 | ||
571 | if ((a->flags & XTENSA_PROP_UNREACHABLE) | |
572 | != (b->flags & XTENSA_PROP_UNREACHABLE)) | |
573 | return ((b->flags & XTENSA_PROP_UNREACHABLE) | |
574 | - (a->flags & XTENSA_PROP_UNREACHABLE)); | |
575 | ||
576 | return (a->flags - b->flags); | |
577 | } | |
578 | ||
579 | return (a->address - b->address); | |
580 | } | |
581 | ||
582 | ||
583 | static int | |
7fa3d080 | 584 | property_table_matches (const void *ap, const void *bp) |
43cd72b9 BW |
585 | { |
586 | const property_table_entry *a = (const property_table_entry *) ap; | |
587 | const property_table_entry *b = (const property_table_entry *) bp; | |
588 | ||
589 | /* Check if one entry overlaps with the other. */ | |
e0001a05 NC |
590 | if ((b->address >= a->address && b->address < (a->address + a->size)) |
591 | || (a->address >= b->address && a->address < (b->address + b->size))) | |
592 | return 0; | |
593 | ||
594 | return (a->address - b->address); | |
595 | } | |
596 | ||
597 | ||
43cd72b9 BW |
598 | /* Get the literal table or property table entries for the given |
599 | section. Sets TABLE_P and returns the number of entries. On | |
600 | error, returns a negative value. */ | |
e0001a05 | 601 | |
7fa3d080 BW |
602 | static int |
603 | xtensa_read_table_entries (bfd *abfd, | |
604 | asection *section, | |
605 | property_table_entry **table_p, | |
606 | const char *sec_name, | |
607 | bfd_boolean output_addr) | |
e0001a05 NC |
608 | { |
609 | asection *table_section; | |
e0001a05 NC |
610 | bfd_size_type table_size = 0; |
611 | bfd_byte *table_data; | |
612 | property_table_entry *blocks; | |
e4115460 | 613 | int blk, block_count; |
e0001a05 | 614 | bfd_size_type num_records; |
bcc2cc8e BW |
615 | Elf_Internal_Rela *internal_relocs, *irel, *rel_end; |
616 | bfd_vma section_addr, off; | |
43cd72b9 | 617 | flagword predef_flags; |
bcc2cc8e | 618 | bfd_size_type table_entry_size, section_limit; |
43cd72b9 BW |
619 | |
620 | if (!section | |
621 | || !(section->flags & SEC_ALLOC) | |
622 | || (section->flags & SEC_DEBUGGING)) | |
623 | { | |
624 | *table_p = NULL; | |
625 | return 0; | |
626 | } | |
e0001a05 | 627 | |
74869ac7 | 628 | table_section = xtensa_get_property_section (section, sec_name); |
43cd72b9 | 629 | if (table_section) |
eea6121a | 630 | table_size = table_section->size; |
43cd72b9 | 631 | |
e0001a05 NC |
632 | if (table_size == 0) |
633 | { | |
634 | *table_p = NULL; | |
635 | return 0; | |
636 | } | |
637 | ||
43cd72b9 BW |
638 | predef_flags = xtensa_get_property_predef_flags (table_section); |
639 | table_entry_size = 12; | |
640 | if (predef_flags) | |
641 | table_entry_size -= 4; | |
642 | ||
643 | num_records = table_size / table_entry_size; | |
e0001a05 NC |
644 | table_data = retrieve_contents (abfd, table_section, TRUE); |
645 | blocks = (property_table_entry *) | |
646 | bfd_malloc (num_records * sizeof (property_table_entry)); | |
647 | block_count = 0; | |
43cd72b9 BW |
648 | |
649 | if (output_addr) | |
650 | section_addr = section->output_section->vma + section->output_offset; | |
651 | else | |
652 | section_addr = section->vma; | |
3ba3bc8c | 653 | |
e0001a05 | 654 | internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE); |
3ba3bc8c | 655 | if (internal_relocs && !table_section->reloc_done) |
e0001a05 | 656 | { |
bcc2cc8e BW |
657 | qsort (internal_relocs, table_section->reloc_count, |
658 | sizeof (Elf_Internal_Rela), internal_reloc_compare); | |
659 | irel = internal_relocs; | |
660 | } | |
661 | else | |
662 | irel = NULL; | |
663 | ||
664 | section_limit = bfd_get_section_limit (abfd, section); | |
665 | rel_end = internal_relocs + table_section->reloc_count; | |
666 | ||
667 | for (off = 0; off < table_size; off += table_entry_size) | |
668 | { | |
669 | bfd_vma address = bfd_get_32 (abfd, table_data + off); | |
670 | ||
671 | /* Skip any relocations before the current offset. This should help | |
672 | avoid confusion caused by unexpected relocations for the preceding | |
673 | table entry. */ | |
674 | while (irel && | |
675 | (irel->r_offset < off | |
676 | || (irel->r_offset == off | |
677 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE))) | |
678 | { | |
679 | irel += 1; | |
680 | if (irel >= rel_end) | |
681 | irel = 0; | |
682 | } | |
e0001a05 | 683 | |
bcc2cc8e | 684 | if (irel && irel->r_offset == off) |
e0001a05 | 685 | { |
bcc2cc8e BW |
686 | bfd_vma sym_off; |
687 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); | |
688 | BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32); | |
e0001a05 | 689 | |
bcc2cc8e | 690 | if (get_elf_r_symndx_section (abfd, r_symndx) != section) |
e0001a05 NC |
691 | continue; |
692 | ||
bcc2cc8e BW |
693 | sym_off = get_elf_r_symndx_offset (abfd, r_symndx); |
694 | BFD_ASSERT (sym_off == 0); | |
695 | address += (section_addr + sym_off + irel->r_addend); | |
e0001a05 | 696 | } |
bcc2cc8e | 697 | else |
e0001a05 | 698 | { |
bcc2cc8e BW |
699 | if (address < section_addr |
700 | || address >= section_addr + section_limit) | |
701 | continue; | |
e0001a05 | 702 | } |
bcc2cc8e BW |
703 | |
704 | blocks[block_count].address = address; | |
705 | blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4); | |
706 | if (predef_flags) | |
707 | blocks[block_count].flags = predef_flags; | |
708 | else | |
709 | blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8); | |
710 | block_count++; | |
e0001a05 NC |
711 | } |
712 | ||
713 | release_contents (table_section, table_data); | |
714 | release_internal_relocs (table_section, internal_relocs); | |
715 | ||
43cd72b9 | 716 | if (block_count > 0) |
e0001a05 NC |
717 | { |
718 | /* Now sort them into address order for easy reference. */ | |
719 | qsort (blocks, block_count, sizeof (property_table_entry), | |
720 | property_table_compare); | |
e4115460 BW |
721 | |
722 | /* Check that the table contents are valid. Problems may occur, | |
723 | for example, if an unrelocated object file is stripped. */ | |
724 | for (blk = 1; blk < block_count; blk++) | |
725 | { | |
726 | /* The only circumstance where two entries may legitimately | |
727 | have the same address is when one of them is a zero-size | |
728 | placeholder to mark a place where fill can be inserted. | |
729 | The zero-size entry should come first. */ | |
730 | if (blocks[blk - 1].address == blocks[blk].address && | |
731 | blocks[blk - 1].size != 0) | |
732 | { | |
733 | (*_bfd_error_handler) (_("%B(%A): invalid property table"), | |
734 | abfd, section); | |
735 | bfd_set_error (bfd_error_bad_value); | |
736 | free (blocks); | |
737 | return -1; | |
738 | } | |
739 | } | |
e0001a05 | 740 | } |
43cd72b9 | 741 | |
e0001a05 NC |
742 | *table_p = blocks; |
743 | return block_count; | |
744 | } | |
745 | ||
746 | ||
7fa3d080 BW |
747 | static property_table_entry * |
748 | elf_xtensa_find_property_entry (property_table_entry *property_table, | |
749 | int property_table_size, | |
750 | bfd_vma addr) | |
e0001a05 NC |
751 | { |
752 | property_table_entry entry; | |
43cd72b9 | 753 | property_table_entry *rv; |
e0001a05 | 754 | |
43cd72b9 BW |
755 | if (property_table_size == 0) |
756 | return NULL; | |
e0001a05 NC |
757 | |
758 | entry.address = addr; | |
759 | entry.size = 1; | |
43cd72b9 | 760 | entry.flags = 0; |
e0001a05 | 761 | |
43cd72b9 BW |
762 | rv = bsearch (&entry, property_table, property_table_size, |
763 | sizeof (property_table_entry), property_table_matches); | |
764 | return rv; | |
765 | } | |
766 | ||
767 | ||
768 | static bfd_boolean | |
7fa3d080 BW |
769 | elf_xtensa_in_literal_pool (property_table_entry *lit_table, |
770 | int lit_table_size, | |
771 | bfd_vma addr) | |
43cd72b9 BW |
772 | { |
773 | if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr)) | |
e0001a05 NC |
774 | return TRUE; |
775 | ||
776 | return FALSE; | |
777 | } | |
778 | ||
779 | \f | |
780 | /* Look through the relocs for a section during the first phase, and | |
781 | calculate needed space in the dynamic reloc sections. */ | |
782 | ||
783 | static bfd_boolean | |
7fa3d080 BW |
784 | elf_xtensa_check_relocs (bfd *abfd, |
785 | struct bfd_link_info *info, | |
786 | asection *sec, | |
787 | const Elf_Internal_Rela *relocs) | |
e0001a05 | 788 | { |
f0e6fdb2 | 789 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
790 | Elf_Internal_Shdr *symtab_hdr; |
791 | struct elf_link_hash_entry **sym_hashes; | |
792 | const Elf_Internal_Rela *rel; | |
793 | const Elf_Internal_Rela *rel_end; | |
e0001a05 | 794 | |
1049f94e | 795 | if (info->relocatable) |
e0001a05 NC |
796 | return TRUE; |
797 | ||
f0e6fdb2 | 798 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
799 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
800 | sym_hashes = elf_sym_hashes (abfd); | |
801 | ||
e0001a05 NC |
802 | rel_end = relocs + sec->reloc_count; |
803 | for (rel = relocs; rel < rel_end; rel++) | |
804 | { | |
805 | unsigned int r_type; | |
806 | unsigned long r_symndx; | |
807 | struct elf_link_hash_entry *h; | |
808 | ||
809 | r_symndx = ELF32_R_SYM (rel->r_info); | |
810 | r_type = ELF32_R_TYPE (rel->r_info); | |
811 | ||
812 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
813 | { | |
d003868e AM |
814 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
815 | abfd, r_symndx); | |
e0001a05 NC |
816 | return FALSE; |
817 | } | |
818 | ||
819 | if (r_symndx < symtab_hdr->sh_info) | |
820 | h = NULL; | |
821 | else | |
822 | { | |
823 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
824 | while (h->root.type == bfd_link_hash_indirect | |
825 | || h->root.type == bfd_link_hash_warning) | |
826 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
827 | } | |
828 | ||
829 | switch (r_type) | |
830 | { | |
831 | case R_XTENSA_32: | |
832 | if (h == NULL) | |
833 | goto local_literal; | |
834 | ||
835 | if ((sec->flags & SEC_ALLOC) != 0) | |
836 | { | |
e0001a05 NC |
837 | if (h->got.refcount <= 0) |
838 | h->got.refcount = 1; | |
839 | else | |
840 | h->got.refcount += 1; | |
841 | } | |
842 | break; | |
843 | ||
844 | case R_XTENSA_PLT: | |
845 | /* If this relocation is against a local symbol, then it's | |
846 | exactly the same as a normal local GOT entry. */ | |
847 | if (h == NULL) | |
848 | goto local_literal; | |
849 | ||
850 | if ((sec->flags & SEC_ALLOC) != 0) | |
851 | { | |
e0001a05 NC |
852 | if (h->plt.refcount <= 0) |
853 | { | |
f5385ebf | 854 | h->needs_plt = 1; |
e0001a05 NC |
855 | h->plt.refcount = 1; |
856 | } | |
857 | else | |
858 | h->plt.refcount += 1; | |
859 | ||
860 | /* Keep track of the total PLT relocation count even if we | |
861 | don't yet know whether the dynamic sections will be | |
862 | created. */ | |
f0e6fdb2 | 863 | htab->plt_reloc_count += 1; |
e0001a05 NC |
864 | |
865 | if (elf_hash_table (info)->dynamic_sections_created) | |
866 | { | |
f0e6fdb2 | 867 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
868 | return FALSE; |
869 | } | |
870 | } | |
871 | break; | |
872 | ||
873 | local_literal: | |
874 | if ((sec->flags & SEC_ALLOC) != 0) | |
875 | { | |
876 | bfd_signed_vma *local_got_refcounts; | |
877 | ||
878 | /* This is a global offset table entry for a local symbol. */ | |
879 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
880 | if (local_got_refcounts == NULL) | |
881 | { | |
882 | bfd_size_type size; | |
883 | ||
884 | size = symtab_hdr->sh_info; | |
885 | size *= sizeof (bfd_signed_vma); | |
43cd72b9 BW |
886 | local_got_refcounts = |
887 | (bfd_signed_vma *) bfd_zalloc (abfd, size); | |
e0001a05 NC |
888 | if (local_got_refcounts == NULL) |
889 | return FALSE; | |
890 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
891 | } | |
892 | local_got_refcounts[r_symndx] += 1; | |
e0001a05 NC |
893 | } |
894 | break; | |
895 | ||
896 | case R_XTENSA_OP0: | |
897 | case R_XTENSA_OP1: | |
898 | case R_XTENSA_OP2: | |
43cd72b9 BW |
899 | case R_XTENSA_SLOT0_OP: |
900 | case R_XTENSA_SLOT1_OP: | |
901 | case R_XTENSA_SLOT2_OP: | |
902 | case R_XTENSA_SLOT3_OP: | |
903 | case R_XTENSA_SLOT4_OP: | |
904 | case R_XTENSA_SLOT5_OP: | |
905 | case R_XTENSA_SLOT6_OP: | |
906 | case R_XTENSA_SLOT7_OP: | |
907 | case R_XTENSA_SLOT8_OP: | |
908 | case R_XTENSA_SLOT9_OP: | |
909 | case R_XTENSA_SLOT10_OP: | |
910 | case R_XTENSA_SLOT11_OP: | |
911 | case R_XTENSA_SLOT12_OP: | |
912 | case R_XTENSA_SLOT13_OP: | |
913 | case R_XTENSA_SLOT14_OP: | |
914 | case R_XTENSA_SLOT0_ALT: | |
915 | case R_XTENSA_SLOT1_ALT: | |
916 | case R_XTENSA_SLOT2_ALT: | |
917 | case R_XTENSA_SLOT3_ALT: | |
918 | case R_XTENSA_SLOT4_ALT: | |
919 | case R_XTENSA_SLOT5_ALT: | |
920 | case R_XTENSA_SLOT6_ALT: | |
921 | case R_XTENSA_SLOT7_ALT: | |
922 | case R_XTENSA_SLOT8_ALT: | |
923 | case R_XTENSA_SLOT9_ALT: | |
924 | case R_XTENSA_SLOT10_ALT: | |
925 | case R_XTENSA_SLOT11_ALT: | |
926 | case R_XTENSA_SLOT12_ALT: | |
927 | case R_XTENSA_SLOT13_ALT: | |
928 | case R_XTENSA_SLOT14_ALT: | |
e0001a05 NC |
929 | case R_XTENSA_ASM_EXPAND: |
930 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 BW |
931 | case R_XTENSA_DIFF8: |
932 | case R_XTENSA_DIFF16: | |
933 | case R_XTENSA_DIFF32: | |
e0001a05 NC |
934 | /* Nothing to do for these. */ |
935 | break; | |
936 | ||
937 | case R_XTENSA_GNU_VTINHERIT: | |
938 | /* This relocation describes the C++ object vtable hierarchy. | |
939 | Reconstruct it for later use during GC. */ | |
c152c796 | 940 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
e0001a05 NC |
941 | return FALSE; |
942 | break; | |
943 | ||
944 | case R_XTENSA_GNU_VTENTRY: | |
945 | /* This relocation describes which C++ vtable entries are actually | |
946 | used. Record for later use during GC. */ | |
d17e0c6e JB |
947 | BFD_ASSERT (h != NULL); |
948 | if (h != NULL | |
949 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
e0001a05 NC |
950 | return FALSE; |
951 | break; | |
952 | ||
953 | default: | |
954 | break; | |
955 | } | |
956 | } | |
957 | ||
e0001a05 NC |
958 | return TRUE; |
959 | } | |
960 | ||
961 | ||
95147441 BW |
962 | static void |
963 | elf_xtensa_make_sym_local (struct bfd_link_info *info, | |
964 | struct elf_link_hash_entry *h) | |
965 | { | |
966 | if (info->shared) | |
967 | { | |
968 | if (h->plt.refcount > 0) | |
969 | { | |
970 | /* For shared objects, there's no need for PLT entries for local | |
971 | symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */ | |
972 | if (h->got.refcount < 0) | |
973 | h->got.refcount = 0; | |
974 | h->got.refcount += h->plt.refcount; | |
975 | h->plt.refcount = 0; | |
976 | } | |
977 | } | |
978 | else | |
979 | { | |
980 | /* Don't need any dynamic relocations at all. */ | |
981 | h->plt.refcount = 0; | |
982 | h->got.refcount = 0; | |
983 | } | |
984 | } | |
985 | ||
986 | ||
987 | static void | |
988 | elf_xtensa_hide_symbol (struct bfd_link_info *info, | |
989 | struct elf_link_hash_entry *h, | |
990 | bfd_boolean force_local) | |
991 | { | |
992 | /* For a shared link, move the plt refcount to the got refcount to leave | |
993 | space for RELATIVE relocs. */ | |
994 | elf_xtensa_make_sym_local (info, h); | |
995 | ||
996 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
997 | } | |
998 | ||
999 | ||
e0001a05 NC |
1000 | /* Return the section that should be marked against GC for a given |
1001 | relocation. */ | |
1002 | ||
1003 | static asection * | |
7fa3d080 | 1004 | elf_xtensa_gc_mark_hook (asection *sec, |
07adf181 | 1005 | struct bfd_link_info *info, |
7fa3d080 BW |
1006 | Elf_Internal_Rela *rel, |
1007 | struct elf_link_hash_entry *h, | |
1008 | Elf_Internal_Sym *sym) | |
e0001a05 | 1009 | { |
e1e5c0b5 BW |
1010 | /* Property sections are marked "KEEP" in the linker scripts, but they |
1011 | should not cause other sections to be marked. (This approach relies | |
1012 | on elf_xtensa_discard_info to remove property table entries that | |
1013 | describe discarded sections. Alternatively, it might be more | |
1014 | efficient to avoid using "KEEP" in the linker scripts and instead use | |
1015 | the gc_mark_extra_sections hook to mark only the property sections | |
1016 | that describe marked sections. That alternative does not work well | |
1017 | with the current property table sections, which do not correspond | |
1018 | one-to-one with the sections they describe, but that should be fixed | |
1019 | someday.) */ | |
1020 | if (xtensa_is_property_section (sec)) | |
1021 | return NULL; | |
1022 | ||
07adf181 AM |
1023 | if (h != NULL) |
1024 | switch (ELF32_R_TYPE (rel->r_info)) | |
1025 | { | |
1026 | case R_XTENSA_GNU_VTINHERIT: | |
1027 | case R_XTENSA_GNU_VTENTRY: | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
e0001a05 NC |
1032 | } |
1033 | ||
7fa3d080 | 1034 | |
e0001a05 NC |
1035 | /* Update the GOT & PLT entry reference counts |
1036 | for the section being removed. */ | |
1037 | ||
1038 | static bfd_boolean | |
7fa3d080 BW |
1039 | elf_xtensa_gc_sweep_hook (bfd *abfd, |
1040 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1041 | asection *sec, | |
1042 | const Elf_Internal_Rela *relocs) | |
e0001a05 NC |
1043 | { |
1044 | Elf_Internal_Shdr *symtab_hdr; | |
1045 | struct elf_link_hash_entry **sym_hashes; | |
1046 | bfd_signed_vma *local_got_refcounts; | |
1047 | const Elf_Internal_Rela *rel, *relend; | |
1048 | ||
1049 | if ((sec->flags & SEC_ALLOC) == 0) | |
1050 | return TRUE; | |
1051 | ||
1052 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1053 | sym_hashes = elf_sym_hashes (abfd); | |
1054 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1055 | ||
1056 | relend = relocs + sec->reloc_count; | |
1057 | for (rel = relocs; rel < relend; rel++) | |
1058 | { | |
1059 | unsigned long r_symndx; | |
1060 | unsigned int r_type; | |
1061 | struct elf_link_hash_entry *h = NULL; | |
1062 | ||
1063 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1064 | if (r_symndx >= symtab_hdr->sh_info) | |
3eb128b2 AM |
1065 | { |
1066 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1067 | while (h->root.type == bfd_link_hash_indirect | |
1068 | || h->root.type == bfd_link_hash_warning) | |
1069 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1070 | } | |
e0001a05 NC |
1071 | |
1072 | r_type = ELF32_R_TYPE (rel->r_info); | |
1073 | switch (r_type) | |
1074 | { | |
1075 | case R_XTENSA_32: | |
1076 | if (h == NULL) | |
1077 | goto local_literal; | |
1078 | if (h->got.refcount > 0) | |
1079 | h->got.refcount--; | |
1080 | break; | |
1081 | ||
1082 | case R_XTENSA_PLT: | |
1083 | if (h == NULL) | |
1084 | goto local_literal; | |
1085 | if (h->plt.refcount > 0) | |
1086 | h->plt.refcount--; | |
1087 | break; | |
1088 | ||
1089 | local_literal: | |
1090 | if (local_got_refcounts[r_symndx] > 0) | |
1091 | local_got_refcounts[r_symndx] -= 1; | |
1092 | break; | |
1093 | ||
1094 | default: | |
1095 | break; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | return TRUE; | |
1100 | } | |
1101 | ||
1102 | ||
1103 | /* Create all the dynamic sections. */ | |
1104 | ||
1105 | static bfd_boolean | |
7fa3d080 | 1106 | elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
e0001a05 | 1107 | { |
f0e6fdb2 | 1108 | struct elf_xtensa_link_hash_table *htab; |
e901de89 | 1109 | flagword flags, noalloc_flags; |
f0e6fdb2 BW |
1110 | |
1111 | htab = elf_xtensa_hash_table (info); | |
e0001a05 NC |
1112 | |
1113 | /* First do all the standard stuff. */ | |
1114 | if (! _bfd_elf_create_dynamic_sections (dynobj, info)) | |
1115 | return FALSE; | |
f0e6fdb2 BW |
1116 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
1117 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1118 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1119 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
e0001a05 NC |
1120 | |
1121 | /* Create any extra PLT sections in case check_relocs has already | |
1122 | been called on all the non-dynamic input files. */ | |
f0e6fdb2 | 1123 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1124 | return FALSE; |
1125 | ||
e901de89 BW |
1126 | noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1127 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1128 | flags = noalloc_flags | SEC_ALLOC | SEC_LOAD; | |
e0001a05 NC |
1129 | |
1130 | /* Mark the ".got.plt" section READONLY. */ | |
f0e6fdb2 BW |
1131 | if (htab->sgotplt == NULL |
1132 | || ! bfd_set_section_flags (dynobj, htab->sgotplt, flags)) | |
e0001a05 NC |
1133 | return FALSE; |
1134 | ||
1135 | /* Create ".rela.got". */ | |
f0e6fdb2 BW |
1136 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", flags); |
1137 | if (htab->srelgot == NULL | |
1138 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
e0001a05 NC |
1139 | return FALSE; |
1140 | ||
e901de89 | 1141 | /* Create ".got.loc" (literal tables for use by dynamic linker). */ |
f0e6fdb2 BW |
1142 | htab->sgotloc = bfd_make_section_with_flags (dynobj, ".got.loc", flags); |
1143 | if (htab->sgotloc == NULL | |
1144 | || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2)) | |
e901de89 BW |
1145 | return FALSE; |
1146 | ||
e0001a05 | 1147 | /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */ |
f0e6fdb2 BW |
1148 | htab->spltlittbl = bfd_make_section_with_flags (dynobj, ".xt.lit.plt", |
1149 | noalloc_flags); | |
1150 | if (htab->spltlittbl == NULL | |
1151 | || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2)) | |
e0001a05 NC |
1152 | return FALSE; |
1153 | ||
1154 | return TRUE; | |
1155 | } | |
1156 | ||
1157 | ||
1158 | static bfd_boolean | |
f0e6fdb2 | 1159 | add_extra_plt_sections (struct bfd_link_info *info, int count) |
e0001a05 | 1160 | { |
f0e6fdb2 | 1161 | bfd *dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
1162 | int chunk; |
1163 | ||
1164 | /* Iterate over all chunks except 0 which uses the standard ".plt" and | |
1165 | ".got.plt" sections. */ | |
1166 | for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--) | |
1167 | { | |
1168 | char *sname; | |
1169 | flagword flags; | |
1170 | asection *s; | |
1171 | ||
1172 | /* Stop when we find a section has already been created. */ | |
f0e6fdb2 | 1173 | if (elf_xtensa_get_plt_section (info, chunk)) |
e0001a05 NC |
1174 | break; |
1175 | ||
1176 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1177 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1178 | ||
1179 | sname = (char *) bfd_malloc (10); | |
1180 | sprintf (sname, ".plt.%u", chunk); | |
ba05963f | 1181 | s = bfd_make_section_with_flags (dynobj, sname, flags | SEC_CODE); |
e0001a05 | 1182 | if (s == NULL |
e0001a05 NC |
1183 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1184 | return FALSE; | |
1185 | ||
1186 | sname = (char *) bfd_malloc (14); | |
1187 | sprintf (sname, ".got.plt.%u", chunk); | |
3496cb2a | 1188 | s = bfd_make_section_with_flags (dynobj, sname, flags); |
e0001a05 | 1189 | if (s == NULL |
e0001a05 NC |
1190 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1191 | return FALSE; | |
1192 | } | |
1193 | ||
1194 | return TRUE; | |
1195 | } | |
1196 | ||
1197 | ||
1198 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1199 | regular object. The current definition is in some section of the | |
1200 | dynamic object, but we're not including those sections. We have to | |
1201 | change the definition to something the rest of the link can | |
1202 | understand. */ | |
1203 | ||
1204 | static bfd_boolean | |
7fa3d080 BW |
1205 | elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1206 | struct elf_link_hash_entry *h) | |
e0001a05 NC |
1207 | { |
1208 | /* If this is a weak symbol, and there is a real definition, the | |
1209 | processor independent code will have arranged for us to see the | |
1210 | real definition first, and we can just use the same value. */ | |
7fa3d080 | 1211 | if (h->u.weakdef) |
e0001a05 | 1212 | { |
f6e332e6 AM |
1213 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1214 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1215 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1216 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
e0001a05 NC |
1217 | return TRUE; |
1218 | } | |
1219 | ||
1220 | /* This is a reference to a symbol defined by a dynamic object. The | |
1221 | reference must go through the GOT, so there's no need for COPY relocs, | |
1222 | .dynbss, etc. */ | |
1223 | ||
1224 | return TRUE; | |
1225 | } | |
1226 | ||
1227 | ||
e0001a05 | 1228 | static bfd_boolean |
f1ab2340 | 1229 | elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg) |
e0001a05 | 1230 | { |
f1ab2340 BW |
1231 | struct bfd_link_info *info; |
1232 | struct elf_xtensa_link_hash_table *htab; | |
1233 | bfd_boolean is_dynamic; | |
e0001a05 | 1234 | |
f1ab2340 BW |
1235 | if (h->root.type == bfd_link_hash_indirect) |
1236 | return TRUE; | |
e0001a05 NC |
1237 | |
1238 | if (h->root.type == bfd_link_hash_warning) | |
1239 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1240 | ||
f1ab2340 BW |
1241 | info = (struct bfd_link_info *) arg; |
1242 | htab = elf_xtensa_hash_table (info); | |
e0001a05 | 1243 | |
f1ab2340 | 1244 | is_dynamic = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 | 1245 | |
f1ab2340 | 1246 | if (! is_dynamic) |
95147441 | 1247 | elf_xtensa_make_sym_local (info, h); |
e0001a05 | 1248 | |
f1ab2340 BW |
1249 | if (h->plt.refcount > 0) |
1250 | htab->srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1251 | |
1252 | if (h->got.refcount > 0) | |
f1ab2340 | 1253 | htab->srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1254 | |
1255 | return TRUE; | |
1256 | } | |
1257 | ||
1258 | ||
1259 | static void | |
f0e6fdb2 | 1260 | elf_xtensa_allocate_local_got_size (struct bfd_link_info *info) |
e0001a05 | 1261 | { |
f0e6fdb2 | 1262 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1263 | bfd *i; |
1264 | ||
f0e6fdb2 BW |
1265 | htab = elf_xtensa_hash_table (info); |
1266 | ||
e0001a05 NC |
1267 | for (i = info->input_bfds; i; i = i->link_next) |
1268 | { | |
1269 | bfd_signed_vma *local_got_refcounts; | |
1270 | bfd_size_type j, cnt; | |
1271 | Elf_Internal_Shdr *symtab_hdr; | |
1272 | ||
1273 | local_got_refcounts = elf_local_got_refcounts (i); | |
1274 | if (!local_got_refcounts) | |
1275 | continue; | |
1276 | ||
1277 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
1278 | cnt = symtab_hdr->sh_info; | |
1279 | ||
1280 | for (j = 0; j < cnt; ++j) | |
1281 | { | |
1282 | if (local_got_refcounts[j] > 0) | |
f0e6fdb2 BW |
1283 | htab->srelgot->size += (local_got_refcounts[j] |
1284 | * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1285 | } |
1286 | } | |
1287 | } | |
1288 | ||
1289 | ||
1290 | /* Set the sizes of the dynamic sections. */ | |
1291 | ||
1292 | static bfd_boolean | |
7fa3d080 BW |
1293 | elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1294 | struct bfd_link_info *info) | |
e0001a05 | 1295 | { |
f0e6fdb2 | 1296 | struct elf_xtensa_link_hash_table *htab; |
e901de89 BW |
1297 | bfd *dynobj, *abfd; |
1298 | asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc; | |
e0001a05 NC |
1299 | bfd_boolean relplt, relgot; |
1300 | int plt_entries, plt_chunks, chunk; | |
1301 | ||
1302 | plt_entries = 0; | |
1303 | plt_chunks = 0; | |
e0001a05 | 1304 | |
f0e6fdb2 | 1305 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
1306 | dynobj = elf_hash_table (info)->dynobj; |
1307 | if (dynobj == NULL) | |
1308 | abort (); | |
f0e6fdb2 BW |
1309 | srelgot = htab->srelgot; |
1310 | srelplt = htab->srelplt; | |
e0001a05 NC |
1311 | |
1312 | if (elf_hash_table (info)->dynamic_sections_created) | |
1313 | { | |
f0e6fdb2 BW |
1314 | BFD_ASSERT (htab->srelgot != NULL |
1315 | && htab->srelplt != NULL | |
1316 | && htab->sgot != NULL | |
1317 | && htab->spltlittbl != NULL | |
1318 | && htab->sgotloc != NULL); | |
1319 | ||
e0001a05 | 1320 | /* Set the contents of the .interp section to the interpreter. */ |
893c4fe2 | 1321 | if (info->executable) |
e0001a05 NC |
1322 | { |
1323 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1324 | if (s == NULL) | |
1325 | abort (); | |
eea6121a | 1326 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
e0001a05 NC |
1327 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1328 | } | |
1329 | ||
1330 | /* Allocate room for one word in ".got". */ | |
f0e6fdb2 | 1331 | htab->sgot->size = 4; |
e0001a05 | 1332 | |
f1ab2340 BW |
1333 | /* Allocate space in ".rela.got" for literals that reference global |
1334 | symbols and space in ".rela.plt" for literals that have PLT | |
1335 | entries. */ | |
e0001a05 | 1336 | elf_link_hash_traverse (elf_hash_table (info), |
f1ab2340 | 1337 | elf_xtensa_allocate_dynrelocs, |
7fa3d080 | 1338 | (void *) info); |
e0001a05 | 1339 | |
e0001a05 NC |
1340 | /* If we are generating a shared object, we also need space in |
1341 | ".rela.got" for R_XTENSA_RELATIVE relocs for literals that | |
1342 | reference local symbols. */ | |
1343 | if (info->shared) | |
f0e6fdb2 | 1344 | elf_xtensa_allocate_local_got_size (info); |
e0001a05 | 1345 | |
e0001a05 NC |
1346 | /* Allocate space in ".plt" to match the size of ".rela.plt". For |
1347 | each PLT entry, we need the PLT code plus a 4-byte literal. | |
1348 | For each chunk of ".plt", we also need two more 4-byte | |
1349 | literals, two corresponding entries in ".rela.got", and an | |
1350 | 8-byte entry in ".xt.lit.plt". */ | |
f0e6fdb2 | 1351 | spltlittbl = htab->spltlittbl; |
eea6121a | 1352 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
1353 | plt_chunks = |
1354 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
1355 | ||
1356 | /* Iterate over all the PLT chunks, including any extra sections | |
1357 | created earlier because the initial count of PLT relocations | |
1358 | was an overestimate. */ | |
1359 | for (chunk = 0; | |
f0e6fdb2 | 1360 | (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL; |
e0001a05 NC |
1361 | chunk++) |
1362 | { | |
1363 | int chunk_entries; | |
1364 | ||
f0e6fdb2 BW |
1365 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
1366 | BFD_ASSERT (sgotplt != NULL); | |
e0001a05 NC |
1367 | |
1368 | if (chunk < plt_chunks - 1) | |
1369 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
1370 | else if (chunk == plt_chunks - 1) | |
1371 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
1372 | else | |
1373 | chunk_entries = 0; | |
1374 | ||
1375 | if (chunk_entries != 0) | |
1376 | { | |
eea6121a AM |
1377 | sgotplt->size = 4 * (chunk_entries + 2); |
1378 | splt->size = PLT_ENTRY_SIZE * chunk_entries; | |
1379 | srelgot->size += 2 * sizeof (Elf32_External_Rela); | |
1380 | spltlittbl->size += 8; | |
e0001a05 NC |
1381 | } |
1382 | else | |
1383 | { | |
eea6121a AM |
1384 | sgotplt->size = 0; |
1385 | splt->size = 0; | |
e0001a05 NC |
1386 | } |
1387 | } | |
e901de89 BW |
1388 | |
1389 | /* Allocate space in ".got.loc" to match the total size of all the | |
1390 | literal tables. */ | |
f0e6fdb2 | 1391 | sgotloc = htab->sgotloc; |
eea6121a | 1392 | sgotloc->size = spltlittbl->size; |
e901de89 BW |
1393 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
1394 | { | |
1395 | if (abfd->flags & DYNAMIC) | |
1396 | continue; | |
1397 | for (s = abfd->sections; s != NULL; s = s->next) | |
1398 | { | |
b536dc1e BW |
1399 | if (! elf_discarded_section (s) |
1400 | && xtensa_is_littable_section (s) | |
1401 | && s != spltlittbl) | |
eea6121a | 1402 | sgotloc->size += s->size; |
e901de89 BW |
1403 | } |
1404 | } | |
e0001a05 NC |
1405 | } |
1406 | ||
1407 | /* Allocate memory for dynamic sections. */ | |
1408 | relplt = FALSE; | |
1409 | relgot = FALSE; | |
1410 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1411 | { | |
1412 | const char *name; | |
e0001a05 NC |
1413 | |
1414 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1415 | continue; | |
1416 | ||
1417 | /* It's OK to base decisions on the section name, because none | |
1418 | of the dynobj section names depend upon the input files. */ | |
1419 | name = bfd_get_section_name (dynobj, s); | |
1420 | ||
0112cd26 | 1421 | if (CONST_STRNEQ (name, ".rela")) |
e0001a05 | 1422 | { |
c456f082 | 1423 | if (s->size != 0) |
e0001a05 | 1424 | { |
c456f082 AM |
1425 | if (strcmp (name, ".rela.plt") == 0) |
1426 | relplt = TRUE; | |
1427 | else if (strcmp (name, ".rela.got") == 0) | |
1428 | relgot = TRUE; | |
1429 | ||
1430 | /* We use the reloc_count field as a counter if we need | |
1431 | to copy relocs into the output file. */ | |
1432 | s->reloc_count = 0; | |
e0001a05 NC |
1433 | } |
1434 | } | |
0112cd26 NC |
1435 | else if (! CONST_STRNEQ (name, ".plt.") |
1436 | && ! CONST_STRNEQ (name, ".got.plt.") | |
c456f082 | 1437 | && strcmp (name, ".got") != 0 |
e0001a05 NC |
1438 | && strcmp (name, ".plt") != 0 |
1439 | && strcmp (name, ".got.plt") != 0 | |
e901de89 BW |
1440 | && strcmp (name, ".xt.lit.plt") != 0 |
1441 | && strcmp (name, ".got.loc") != 0) | |
e0001a05 NC |
1442 | { |
1443 | /* It's not one of our sections, so don't allocate space. */ | |
1444 | continue; | |
1445 | } | |
1446 | ||
c456f082 AM |
1447 | if (s->size == 0) |
1448 | { | |
1449 | /* If we don't need this section, strip it from the output | |
1450 | file. We must create the ".plt*" and ".got.plt*" | |
1451 | sections in create_dynamic_sections and/or check_relocs | |
1452 | based on a conservative estimate of the PLT relocation | |
1453 | count, because the sections must be created before the | |
1454 | linker maps input sections to output sections. The | |
1455 | linker does that before size_dynamic_sections, where we | |
1456 | compute the exact size of the PLT, so there may be more | |
1457 | of these sections than are actually needed. */ | |
1458 | s->flags |= SEC_EXCLUDE; | |
1459 | } | |
1460 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
e0001a05 NC |
1461 | { |
1462 | /* Allocate memory for the section contents. */ | |
eea6121a | 1463 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1464 | if (s->contents == NULL) |
e0001a05 NC |
1465 | return FALSE; |
1466 | } | |
1467 | } | |
1468 | ||
1469 | if (elf_hash_table (info)->dynamic_sections_created) | |
1470 | { | |
1471 | /* Add the special XTENSA_RTLD relocations now. The offsets won't be | |
1472 | known until finish_dynamic_sections, but we need to get the relocs | |
1473 | in place before they are sorted. */ | |
e0001a05 NC |
1474 | for (chunk = 0; chunk < plt_chunks; chunk++) |
1475 | { | |
1476 | Elf_Internal_Rela irela; | |
1477 | bfd_byte *loc; | |
1478 | ||
1479 | irela.r_offset = 0; | |
1480 | irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD); | |
1481 | irela.r_addend = 0; | |
1482 | ||
1483 | loc = (srelgot->contents | |
1484 | + srelgot->reloc_count * sizeof (Elf32_External_Rela)); | |
1485 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
1486 | bfd_elf32_swap_reloca_out (output_bfd, &irela, | |
1487 | loc + sizeof (Elf32_External_Rela)); | |
1488 | srelgot->reloc_count += 2; | |
1489 | } | |
1490 | ||
1491 | /* Add some entries to the .dynamic section. We fill in the | |
1492 | values later, in elf_xtensa_finish_dynamic_sections, but we | |
1493 | must add the entries now so that we get the correct size for | |
1494 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1495 | dynamic linker and used by the debugger. */ | |
1496 | #define add_dynamic_entry(TAG, VAL) \ | |
5a580b3a | 1497 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
e0001a05 | 1498 | |
ba05963f | 1499 | if (info->executable) |
e0001a05 NC |
1500 | { |
1501 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1502 | return FALSE; | |
1503 | } | |
1504 | ||
1505 | if (relplt) | |
1506 | { | |
1507 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
1508 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1509 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1510 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1511 | return FALSE; | |
1512 | } | |
1513 | ||
1514 | if (relgot) | |
1515 | { | |
1516 | if (!add_dynamic_entry (DT_RELA, 0) | |
1517 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1518 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
1519 | return FALSE; | |
1520 | } | |
1521 | ||
e0001a05 NC |
1522 | if (!add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0) |
1523 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0)) | |
1524 | return FALSE; | |
1525 | } | |
1526 | #undef add_dynamic_entry | |
1527 | ||
1528 | return TRUE; | |
1529 | } | |
1530 | ||
e0001a05 NC |
1531 | \f |
1532 | /* Perform the specified relocation. The instruction at (contents + address) | |
1533 | is modified to set one operand to represent the value in "relocation". The | |
1534 | operand position is determined by the relocation type recorded in the | |
1535 | howto. */ | |
1536 | ||
1537 | #define CALL_SEGMENT_BITS (30) | |
7fa3d080 | 1538 | #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS) |
e0001a05 NC |
1539 | |
1540 | static bfd_reloc_status_type | |
7fa3d080 BW |
1541 | elf_xtensa_do_reloc (reloc_howto_type *howto, |
1542 | bfd *abfd, | |
1543 | asection *input_section, | |
1544 | bfd_vma relocation, | |
1545 | bfd_byte *contents, | |
1546 | bfd_vma address, | |
1547 | bfd_boolean is_weak_undef, | |
1548 | char **error_message) | |
e0001a05 | 1549 | { |
43cd72b9 | 1550 | xtensa_format fmt; |
e0001a05 | 1551 | xtensa_opcode opcode; |
e0001a05 | 1552 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
1553 | static xtensa_insnbuf ibuff = NULL; |
1554 | static xtensa_insnbuf sbuff = NULL; | |
1555 | bfd_vma self_address = 0; | |
1556 | bfd_size_type input_size; | |
1557 | int opnd, slot; | |
e0001a05 NC |
1558 | uint32 newval; |
1559 | ||
43cd72b9 BW |
1560 | if (!ibuff) |
1561 | { | |
1562 | ibuff = xtensa_insnbuf_alloc (isa); | |
1563 | sbuff = xtensa_insnbuf_alloc (isa); | |
1564 | } | |
1565 | ||
1566 | input_size = bfd_get_section_limit (abfd, input_section); | |
1567 | ||
e0001a05 NC |
1568 | switch (howto->type) |
1569 | { | |
1570 | case R_XTENSA_NONE: | |
43cd72b9 BW |
1571 | case R_XTENSA_DIFF8: |
1572 | case R_XTENSA_DIFF16: | |
1573 | case R_XTENSA_DIFF32: | |
e0001a05 NC |
1574 | return bfd_reloc_ok; |
1575 | ||
1576 | case R_XTENSA_ASM_EXPAND: | |
1577 | if (!is_weak_undef) | |
1578 | { | |
1579 | /* Check for windowed CALL across a 1GB boundary. */ | |
1580 | xtensa_opcode opcode = | |
1581 | get_expanded_call_opcode (contents + address, | |
43cd72b9 | 1582 | input_size - address, 0); |
e0001a05 NC |
1583 | if (is_windowed_call_opcode (opcode)) |
1584 | { | |
1585 | self_address = (input_section->output_section->vma | |
1586 | + input_section->output_offset | |
1587 | + address); | |
43cd72b9 BW |
1588 | if ((self_address >> CALL_SEGMENT_BITS) |
1589 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 NC |
1590 | { |
1591 | *error_message = "windowed longcall crosses 1GB boundary; " | |
1592 | "return may fail"; | |
1593 | return bfd_reloc_dangerous; | |
1594 | } | |
1595 | } | |
1596 | } | |
1597 | return bfd_reloc_ok; | |
1598 | ||
1599 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 | 1600 | { |
e0001a05 | 1601 | /* Convert the L32R/CALLX to CALL. */ |
43cd72b9 BW |
1602 | bfd_reloc_status_type retval = |
1603 | elf_xtensa_do_asm_simplify (contents, address, input_size, | |
1604 | error_message); | |
e0001a05 | 1605 | if (retval != bfd_reloc_ok) |
43cd72b9 | 1606 | return bfd_reloc_dangerous; |
e0001a05 NC |
1607 | |
1608 | /* The CALL needs to be relocated. Continue below for that part. */ | |
1609 | address += 3; | |
43cd72b9 | 1610 | howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ]; |
e0001a05 NC |
1611 | } |
1612 | break; | |
1613 | ||
1614 | case R_XTENSA_32: | |
1615 | case R_XTENSA_PLT: | |
1616 | { | |
1617 | bfd_vma x; | |
1618 | x = bfd_get_32 (abfd, contents + address); | |
1619 | x = x + relocation; | |
1620 | bfd_put_32 (abfd, x, contents + address); | |
1621 | } | |
1622 | return bfd_reloc_ok; | |
1623 | } | |
1624 | ||
43cd72b9 BW |
1625 | /* Only instruction slot-specific relocations handled below.... */ |
1626 | slot = get_relocation_slot (howto->type); | |
1627 | if (slot == XTENSA_UNDEFINED) | |
e0001a05 | 1628 | { |
43cd72b9 | 1629 | *error_message = "unexpected relocation"; |
e0001a05 NC |
1630 | return bfd_reloc_dangerous; |
1631 | } | |
1632 | ||
43cd72b9 BW |
1633 | /* Read the instruction into a buffer and decode the opcode. */ |
1634 | xtensa_insnbuf_from_chars (isa, ibuff, contents + address, | |
1635 | input_size - address); | |
1636 | fmt = xtensa_format_decode (isa, ibuff); | |
1637 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 1638 | { |
43cd72b9 | 1639 | *error_message = "cannot decode instruction format"; |
e0001a05 NC |
1640 | return bfd_reloc_dangerous; |
1641 | } | |
1642 | ||
43cd72b9 | 1643 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); |
e0001a05 | 1644 | |
43cd72b9 BW |
1645 | opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff); |
1646 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 1647 | { |
43cd72b9 | 1648 | *error_message = "cannot decode instruction opcode"; |
e0001a05 NC |
1649 | return bfd_reloc_dangerous; |
1650 | } | |
1651 | ||
43cd72b9 BW |
1652 | /* Check for opcode-specific "alternate" relocations. */ |
1653 | if (is_alt_relocation (howto->type)) | |
1654 | { | |
1655 | if (opcode == get_l32r_opcode ()) | |
1656 | { | |
1657 | /* Handle the special-case of non-PC-relative L32R instructions. */ | |
1658 | bfd *output_bfd = input_section->output_section->owner; | |
1659 | asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4"); | |
1660 | if (!lit4_sec) | |
1661 | { | |
1662 | *error_message = "relocation references missing .lit4 section"; | |
1663 | return bfd_reloc_dangerous; | |
1664 | } | |
1665 | self_address = ((lit4_sec->vma & ~0xfff) | |
1666 | + 0x40000 - 3); /* -3 to compensate for do_reloc */ | |
1667 | newval = relocation; | |
1668 | opnd = 1; | |
1669 | } | |
1670 | else if (opcode == get_const16_opcode ()) | |
1671 | { | |
1672 | /* ALT used for high 16 bits. */ | |
1673 | newval = relocation >> 16; | |
1674 | opnd = 1; | |
1675 | } | |
1676 | else | |
1677 | { | |
1678 | /* No other "alternate" relocations currently defined. */ | |
1679 | *error_message = "unexpected relocation"; | |
1680 | return bfd_reloc_dangerous; | |
1681 | } | |
1682 | } | |
1683 | else /* Not an "alternate" relocation.... */ | |
1684 | { | |
1685 | if (opcode == get_const16_opcode ()) | |
1686 | { | |
1687 | newval = relocation & 0xffff; | |
1688 | opnd = 1; | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | /* ...normal PC-relative relocation.... */ | |
1693 | ||
1694 | /* Determine which operand is being relocated. */ | |
1695 | opnd = get_relocation_opnd (opcode, howto->type); | |
1696 | if (opnd == XTENSA_UNDEFINED) | |
1697 | { | |
1698 | *error_message = "unexpected relocation"; | |
1699 | return bfd_reloc_dangerous; | |
1700 | } | |
1701 | ||
1702 | if (!howto->pc_relative) | |
1703 | { | |
1704 | *error_message = "expected PC-relative relocation"; | |
1705 | return bfd_reloc_dangerous; | |
1706 | } | |
e0001a05 | 1707 | |
43cd72b9 BW |
1708 | /* Calculate the PC address for this instruction. */ |
1709 | self_address = (input_section->output_section->vma | |
1710 | + input_section->output_offset | |
1711 | + address); | |
e0001a05 | 1712 | |
43cd72b9 BW |
1713 | newval = relocation; |
1714 | } | |
1715 | } | |
e0001a05 | 1716 | |
43cd72b9 BW |
1717 | /* Apply the relocation. */ |
1718 | if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address) | |
1719 | || xtensa_operand_encode (isa, opcode, opnd, &newval) | |
1720 | || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot, | |
1721 | sbuff, newval)) | |
e0001a05 | 1722 | { |
2db662be BW |
1723 | const char *opname = xtensa_opcode_name (isa, opcode); |
1724 | const char *msg; | |
1725 | ||
1726 | msg = "cannot encode"; | |
1727 | if (is_direct_call_opcode (opcode)) | |
1728 | { | |
1729 | if ((relocation & 0x3) != 0) | |
1730 | msg = "misaligned call target"; | |
1731 | else | |
1732 | msg = "call target out of range"; | |
1733 | } | |
1734 | else if (opcode == get_l32r_opcode ()) | |
1735 | { | |
1736 | if ((relocation & 0x3) != 0) | |
1737 | msg = "misaligned literal target"; | |
1738 | else if (is_alt_relocation (howto->type)) | |
1739 | msg = "literal target out of range (too many literals)"; | |
1740 | else if (self_address > relocation) | |
1741 | msg = "literal target out of range (try using text-section-literals)"; | |
1742 | else | |
1743 | msg = "literal placed after use"; | |
1744 | } | |
1745 | ||
1746 | *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg); | |
e0001a05 NC |
1747 | return bfd_reloc_dangerous; |
1748 | } | |
1749 | ||
43cd72b9 | 1750 | /* Check for calls across 1GB boundaries. */ |
e0001a05 NC |
1751 | if (is_direct_call_opcode (opcode) |
1752 | && is_windowed_call_opcode (opcode)) | |
1753 | { | |
43cd72b9 BW |
1754 | if ((self_address >> CALL_SEGMENT_BITS) |
1755 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 | 1756 | { |
43cd72b9 BW |
1757 | *error_message = |
1758 | "windowed call crosses 1GB boundary; return may fail"; | |
e0001a05 NC |
1759 | return bfd_reloc_dangerous; |
1760 | } | |
1761 | } | |
1762 | ||
43cd72b9 BW |
1763 | /* Write the modified instruction back out of the buffer. */ |
1764 | xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff); | |
1765 | xtensa_insnbuf_to_chars (isa, ibuff, contents + address, | |
1766 | input_size - address); | |
e0001a05 NC |
1767 | return bfd_reloc_ok; |
1768 | } | |
1769 | ||
1770 | ||
2db662be | 1771 | static char * |
7fa3d080 | 1772 | vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...) |
e0001a05 NC |
1773 | { |
1774 | /* To reduce the size of the memory leak, | |
1775 | we only use a single message buffer. */ | |
1776 | static bfd_size_type alloc_size = 0; | |
1777 | static char *message = NULL; | |
1778 | bfd_size_type orig_len, len = 0; | |
1779 | bfd_boolean is_append; | |
1780 | ||
1781 | VA_OPEN (ap, arglen); | |
1782 | VA_FIXEDARG (ap, const char *, origmsg); | |
1783 | ||
1784 | is_append = (origmsg == message); | |
1785 | ||
1786 | orig_len = strlen (origmsg); | |
1787 | len = orig_len + strlen (fmt) + arglen + 20; | |
1788 | if (len > alloc_size) | |
1789 | { | |
1790 | message = (char *) bfd_realloc (message, len); | |
1791 | alloc_size = len; | |
1792 | } | |
1793 | if (!is_append) | |
1794 | memcpy (message, origmsg, orig_len); | |
1795 | vsprintf (message + orig_len, fmt, ap); | |
1796 | VA_CLOSE (ap); | |
1797 | return message; | |
1798 | } | |
1799 | ||
1800 | ||
e0001a05 NC |
1801 | /* This function is registered as the "special_function" in the |
1802 | Xtensa howto for handling simplify operations. | |
1803 | bfd_perform_relocation / bfd_install_relocation use it to | |
1804 | perform (install) the specified relocation. Since this replaces the code | |
1805 | in bfd_perform_relocation, it is basically an Xtensa-specific, | |
1806 | stripped-down version of bfd_perform_relocation. */ | |
1807 | ||
1808 | static bfd_reloc_status_type | |
7fa3d080 BW |
1809 | bfd_elf_xtensa_reloc (bfd *abfd, |
1810 | arelent *reloc_entry, | |
1811 | asymbol *symbol, | |
1812 | void *data, | |
1813 | asection *input_section, | |
1814 | bfd *output_bfd, | |
1815 | char **error_message) | |
e0001a05 NC |
1816 | { |
1817 | bfd_vma relocation; | |
1818 | bfd_reloc_status_type flag; | |
1819 | bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1820 | bfd_vma output_base = 0; | |
1821 | reloc_howto_type *howto = reloc_entry->howto; | |
1822 | asection *reloc_target_output_section; | |
1823 | bfd_boolean is_weak_undef; | |
1824 | ||
dd1a320b BW |
1825 | if (!xtensa_default_isa) |
1826 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
1827 | ||
1049f94e | 1828 | /* ELF relocs are against symbols. If we are producing relocatable |
e0001a05 NC |
1829 | output, and the reloc is against an external symbol, the resulting |
1830 | reloc will also be against the same symbol. In such a case, we | |
1831 | don't want to change anything about the way the reloc is handled, | |
1832 | since it will all be done at final link time. This test is similar | |
1833 | to what bfd_elf_generic_reloc does except that it lets relocs with | |
1834 | howto->partial_inplace go through even if the addend is non-zero. | |
1835 | (The real problem is that partial_inplace is set for XTENSA_32 | |
1836 | relocs to begin with, but that's a long story and there's little we | |
1837 | can do about it now....) */ | |
1838 | ||
7fa3d080 | 1839 | if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0) |
e0001a05 NC |
1840 | { |
1841 | reloc_entry->address += input_section->output_offset; | |
1842 | return bfd_reloc_ok; | |
1843 | } | |
1844 | ||
1845 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1846 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
e0001a05 NC |
1847 | return bfd_reloc_outofrange; |
1848 | ||
4cc11e76 | 1849 | /* Work out which section the relocation is targeted at and the |
e0001a05 NC |
1850 | initial relocation command value. */ |
1851 | ||
1852 | /* Get symbol value. (Common symbols are special.) */ | |
1853 | if (bfd_is_com_section (symbol->section)) | |
1854 | relocation = 0; | |
1855 | else | |
1856 | relocation = symbol->value; | |
1857 | ||
1858 | reloc_target_output_section = symbol->section->output_section; | |
1859 | ||
1860 | /* Convert input-section-relative symbol value to absolute. */ | |
1861 | if ((output_bfd && !howto->partial_inplace) | |
1862 | || reloc_target_output_section == NULL) | |
1863 | output_base = 0; | |
1864 | else | |
1865 | output_base = reloc_target_output_section->vma; | |
1866 | ||
1867 | relocation += output_base + symbol->section->output_offset; | |
1868 | ||
1869 | /* Add in supplied addend. */ | |
1870 | relocation += reloc_entry->addend; | |
1871 | ||
1872 | /* Here the variable relocation holds the final address of the | |
1873 | symbol we are relocating against, plus any addend. */ | |
1874 | if (output_bfd) | |
1875 | { | |
1876 | if (!howto->partial_inplace) | |
1877 | { | |
1878 | /* This is a partial relocation, and we want to apply the relocation | |
1879 | to the reloc entry rather than the raw data. Everything except | |
1880 | relocations against section symbols has already been handled | |
1881 | above. */ | |
43cd72b9 | 1882 | |
e0001a05 NC |
1883 | BFD_ASSERT (symbol->flags & BSF_SECTION_SYM); |
1884 | reloc_entry->addend = relocation; | |
1885 | reloc_entry->address += input_section->output_offset; | |
1886 | return bfd_reloc_ok; | |
1887 | } | |
1888 | else | |
1889 | { | |
1890 | reloc_entry->address += input_section->output_offset; | |
1891 | reloc_entry->addend = 0; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | is_weak_undef = (bfd_is_und_section (symbol->section) | |
1896 | && (symbol->flags & BSF_WEAK) != 0); | |
1897 | flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation, | |
1898 | (bfd_byte *) data, (bfd_vma) octets, | |
1899 | is_weak_undef, error_message); | |
1900 | ||
1901 | if (flag == bfd_reloc_dangerous) | |
1902 | { | |
1903 | /* Add the symbol name to the error message. */ | |
1904 | if (! *error_message) | |
1905 | *error_message = ""; | |
1906 | *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)", | |
1907 | strlen (symbol->name) + 17, | |
70961b9d AM |
1908 | symbol->name, |
1909 | (unsigned long) reloc_entry->addend); | |
e0001a05 NC |
1910 | } |
1911 | ||
1912 | return flag; | |
1913 | } | |
1914 | ||
1915 | ||
1916 | /* Set up an entry in the procedure linkage table. */ | |
1917 | ||
1918 | static bfd_vma | |
f0e6fdb2 | 1919 | elf_xtensa_create_plt_entry (struct bfd_link_info *info, |
7fa3d080 BW |
1920 | bfd *output_bfd, |
1921 | unsigned reloc_index) | |
e0001a05 NC |
1922 | { |
1923 | asection *splt, *sgotplt; | |
1924 | bfd_vma plt_base, got_base; | |
1925 | bfd_vma code_offset, lit_offset; | |
1926 | int chunk; | |
1927 | ||
1928 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
1929 | splt = elf_xtensa_get_plt_section (info, chunk); |
1930 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
1931 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
1932 | ||
1933 | plt_base = splt->output_section->vma + splt->output_offset; | |
1934 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
1935 | ||
1936 | lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4; | |
1937 | code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE; | |
1938 | ||
1939 | /* Fill in the literal entry. This is the offset of the dynamic | |
1940 | relocation entry. */ | |
1941 | bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela), | |
1942 | sgotplt->contents + lit_offset); | |
1943 | ||
1944 | /* Fill in the entry in the procedure linkage table. */ | |
1945 | memcpy (splt->contents + code_offset, | |
1946 | (bfd_big_endian (output_bfd) | |
1947 | ? elf_xtensa_be_plt_entry | |
1948 | : elf_xtensa_le_plt_entry), | |
1949 | PLT_ENTRY_SIZE); | |
1950 | bfd_put_16 (output_bfd, l32r_offset (got_base + 0, | |
1951 | plt_base + code_offset + 3), | |
1952 | splt->contents + code_offset + 4); | |
1953 | bfd_put_16 (output_bfd, l32r_offset (got_base + 4, | |
1954 | plt_base + code_offset + 6), | |
1955 | splt->contents + code_offset + 7); | |
1956 | bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset, | |
1957 | plt_base + code_offset + 9), | |
1958 | splt->contents + code_offset + 10); | |
1959 | ||
1960 | return plt_base + code_offset; | |
1961 | } | |
1962 | ||
1963 | ||
e0001a05 | 1964 | /* Relocate an Xtensa ELF section. This is invoked by the linker for |
1049f94e | 1965 | both relocatable and final links. */ |
e0001a05 NC |
1966 | |
1967 | static bfd_boolean | |
7fa3d080 BW |
1968 | elf_xtensa_relocate_section (bfd *output_bfd, |
1969 | struct bfd_link_info *info, | |
1970 | bfd *input_bfd, | |
1971 | asection *input_section, | |
1972 | bfd_byte *contents, | |
1973 | Elf_Internal_Rela *relocs, | |
1974 | Elf_Internal_Sym *local_syms, | |
1975 | asection **local_sections) | |
e0001a05 | 1976 | { |
f0e6fdb2 | 1977 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1978 | Elf_Internal_Shdr *symtab_hdr; |
1979 | Elf_Internal_Rela *rel; | |
1980 | Elf_Internal_Rela *relend; | |
1981 | struct elf_link_hash_entry **sym_hashes; | |
88d65ad6 BW |
1982 | property_table_entry *lit_table = 0; |
1983 | int ltblsize = 0; | |
e0001a05 | 1984 | char *error_message = NULL; |
43cd72b9 | 1985 | bfd_size_type input_size; |
e0001a05 | 1986 | |
43cd72b9 BW |
1987 | if (!xtensa_default_isa) |
1988 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 1989 | |
f0e6fdb2 | 1990 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
1991 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1992 | sym_hashes = elf_sym_hashes (input_bfd); | |
1993 | ||
88d65ad6 BW |
1994 | if (elf_hash_table (info)->dynamic_sections_created) |
1995 | { | |
1996 | ltblsize = xtensa_read_table_entries (input_bfd, input_section, | |
43cd72b9 BW |
1997 | &lit_table, XTENSA_LIT_SEC_NAME, |
1998 | TRUE); | |
88d65ad6 BW |
1999 | if (ltblsize < 0) |
2000 | return FALSE; | |
2001 | } | |
2002 | ||
43cd72b9 BW |
2003 | input_size = bfd_get_section_limit (input_bfd, input_section); |
2004 | ||
e0001a05 NC |
2005 | rel = relocs; |
2006 | relend = relocs + input_section->reloc_count; | |
2007 | for (; rel < relend; rel++) | |
2008 | { | |
2009 | int r_type; | |
2010 | reloc_howto_type *howto; | |
2011 | unsigned long r_symndx; | |
2012 | struct elf_link_hash_entry *h; | |
2013 | Elf_Internal_Sym *sym; | |
2014 | asection *sec; | |
2015 | bfd_vma relocation; | |
2016 | bfd_reloc_status_type r; | |
2017 | bfd_boolean is_weak_undef; | |
2018 | bfd_boolean unresolved_reloc; | |
9b8c98a4 | 2019 | bfd_boolean warned; |
e0001a05 NC |
2020 | |
2021 | r_type = ELF32_R_TYPE (rel->r_info); | |
2022 | if (r_type == (int) R_XTENSA_GNU_VTINHERIT | |
2023 | || r_type == (int) R_XTENSA_GNU_VTENTRY) | |
2024 | continue; | |
2025 | ||
2026 | if (r_type < 0 || r_type >= (int) R_XTENSA_max) | |
2027 | { | |
2028 | bfd_set_error (bfd_error_bad_value); | |
2029 | return FALSE; | |
2030 | } | |
2031 | howto = &elf_howto_table[r_type]; | |
2032 | ||
2033 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2034 | ||
ab96bf03 AM |
2035 | h = NULL; |
2036 | sym = NULL; | |
2037 | sec = NULL; | |
2038 | is_weak_undef = FALSE; | |
2039 | unresolved_reloc = FALSE; | |
2040 | warned = FALSE; | |
2041 | ||
2042 | if (howto->partial_inplace && !info->relocatable) | |
2043 | { | |
2044 | /* Because R_XTENSA_32 was made partial_inplace to fix some | |
2045 | problems with DWARF info in partial links, there may be | |
2046 | an addend stored in the contents. Take it out of there | |
2047 | and move it back into the addend field of the reloc. */ | |
2048 | rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2049 | bfd_put_32 (input_bfd, 0, contents + rel->r_offset); | |
2050 | } | |
2051 | ||
2052 | if (r_symndx < symtab_hdr->sh_info) | |
2053 | { | |
2054 | sym = local_syms + r_symndx; | |
2055 | sec = local_sections[r_symndx]; | |
2056 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2057 | } | |
2058 | else | |
2059 | { | |
2060 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2061 | r_symndx, symtab_hdr, sym_hashes, | |
2062 | h, sec, relocation, | |
2063 | unresolved_reloc, warned); | |
2064 | ||
2065 | if (relocation == 0 | |
2066 | && !unresolved_reloc | |
2067 | && h->root.type == bfd_link_hash_undefweak) | |
2068 | is_weak_undef = TRUE; | |
2069 | } | |
2070 | ||
2071 | if (sec != NULL && elf_discarded_section (sec)) | |
2072 | { | |
2073 | /* For relocs against symbols from removed linkonce sections, | |
2074 | or sections discarded by a linker script, we just want the | |
2075 | section contents zeroed. Avoid any special processing. */ | |
2076 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2077 | rel->r_info = 0; | |
2078 | rel->r_addend = 0; | |
2079 | continue; | |
2080 | } | |
2081 | ||
1049f94e | 2082 | if (info->relocatable) |
e0001a05 | 2083 | { |
43cd72b9 | 2084 | /* This is a relocatable link. |
e0001a05 NC |
2085 | 1) If the reloc is against a section symbol, adjust |
2086 | according to the output section. | |
2087 | 2) If there is a new target for this relocation, | |
2088 | the new target will be in the same output section. | |
2089 | We adjust the relocation by the output section | |
2090 | difference. */ | |
2091 | ||
2092 | if (relaxing_section) | |
2093 | { | |
2094 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2095 | if (!do_fix_for_relocatable_link (rel, input_bfd, input_section, |
2096 | contents)) | |
2097 | return FALSE; | |
e0001a05 NC |
2098 | } |
2099 | ||
43cd72b9 | 2100 | if (r_type == R_XTENSA_ASM_SIMPLIFY) |
e0001a05 | 2101 | { |
43cd72b9 | 2102 | char *error_message = NULL; |
e0001a05 NC |
2103 | /* Convert ASM_SIMPLIFY into the simpler relocation |
2104 | so that they never escape a relaxing link. */ | |
43cd72b9 BW |
2105 | r = contract_asm_expansion (contents, input_size, rel, |
2106 | &error_message); | |
2107 | if (r != bfd_reloc_ok) | |
2108 | { | |
2109 | if (!((*info->callbacks->reloc_dangerous) | |
2110 | (info, error_message, input_bfd, input_section, | |
2111 | rel->r_offset))) | |
2112 | return FALSE; | |
2113 | } | |
e0001a05 NC |
2114 | r_type = ELF32_R_TYPE (rel->r_info); |
2115 | } | |
2116 | ||
1049f94e | 2117 | /* This is a relocatable link, so we don't have to change |
e0001a05 NC |
2118 | anything unless the reloc is against a section symbol, |
2119 | in which case we have to adjust according to where the | |
2120 | section symbol winds up in the output section. */ | |
2121 | if (r_symndx < symtab_hdr->sh_info) | |
2122 | { | |
2123 | sym = local_syms + r_symndx; | |
2124 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2125 | { | |
2126 | sec = local_sections[r_symndx]; | |
2127 | rel->r_addend += sec->output_offset + sym->st_value; | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | /* If there is an addend with a partial_inplace howto, | |
2132 | then move the addend to the contents. This is a hack | |
1049f94e | 2133 | to work around problems with DWARF in relocatable links |
e0001a05 NC |
2134 | with some previous version of BFD. Now we can't easily get |
2135 | rid of the hack without breaking backward compatibility.... */ | |
2136 | if (rel->r_addend) | |
2137 | { | |
2138 | howto = &elf_howto_table[r_type]; | |
2139 | if (howto->partial_inplace) | |
2140 | { | |
2141 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2142 | rel->r_addend, contents, | |
2143 | rel->r_offset, FALSE, | |
2144 | &error_message); | |
2145 | if (r != bfd_reloc_ok) | |
2146 | { | |
2147 | if (!((*info->callbacks->reloc_dangerous) | |
2148 | (info, error_message, input_bfd, input_section, | |
2149 | rel->r_offset))) | |
2150 | return FALSE; | |
2151 | } | |
2152 | rel->r_addend = 0; | |
2153 | } | |
2154 | } | |
2155 | ||
1049f94e | 2156 | /* Done with work for relocatable link; continue with next reloc. */ |
e0001a05 NC |
2157 | continue; |
2158 | } | |
2159 | ||
2160 | /* This is a final link. */ | |
2161 | ||
e0001a05 NC |
2162 | if (relaxing_section) |
2163 | { | |
2164 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2165 | do_fix_for_final_link (rel, input_bfd, input_section, contents, |
2166 | &relocation); | |
e0001a05 NC |
2167 | } |
2168 | ||
2169 | /* Sanity check the address. */ | |
43cd72b9 | 2170 | if (rel->r_offset >= input_size |
e0001a05 NC |
2171 | && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE) |
2172 | { | |
43cd72b9 BW |
2173 | (*_bfd_error_handler) |
2174 | (_("%B(%A+0x%lx): relocation offset out of range (size=0x%x)"), | |
2175 | input_bfd, input_section, rel->r_offset, input_size); | |
e0001a05 NC |
2176 | bfd_set_error (bfd_error_bad_value); |
2177 | return FALSE; | |
2178 | } | |
2179 | ||
2180 | /* Generate dynamic relocations. */ | |
2181 | if (elf_hash_table (info)->dynamic_sections_created) | |
2182 | { | |
4608f3d9 | 2183 | bfd_boolean dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 | 2184 | |
43cd72b9 | 2185 | if (dynamic_symbol && is_operand_relocation (r_type)) |
e0001a05 NC |
2186 | { |
2187 | /* This is an error. The symbol's real value won't be known | |
2188 | until runtime and it's likely to be out of range anyway. */ | |
2189 | const char *name = h->root.root.string; | |
2190 | error_message = vsprint_msg ("invalid relocation for dynamic " | |
2191 | "symbol", ": %s", | |
2192 | strlen (name) + 2, name); | |
2193 | if (!((*info->callbacks->reloc_dangerous) | |
2194 | (info, error_message, input_bfd, input_section, | |
2195 | rel->r_offset))) | |
2196 | return FALSE; | |
2197 | } | |
2198 | else if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
2199 | && (input_section->flags & SEC_ALLOC) != 0 | |
2200 | && (dynamic_symbol || info->shared)) | |
2201 | { | |
2202 | Elf_Internal_Rela outrel; | |
2203 | bfd_byte *loc; | |
2204 | asection *srel; | |
2205 | ||
2206 | if (dynamic_symbol && r_type == R_XTENSA_PLT) | |
f0e6fdb2 | 2207 | srel = htab->srelplt; |
e0001a05 | 2208 | else |
f0e6fdb2 | 2209 | srel = htab->srelgot; |
e0001a05 NC |
2210 | |
2211 | BFD_ASSERT (srel != NULL); | |
2212 | ||
2213 | outrel.r_offset = | |
2214 | _bfd_elf_section_offset (output_bfd, info, | |
2215 | input_section, rel->r_offset); | |
2216 | ||
2217 | if ((outrel.r_offset | 1) == (bfd_vma) -1) | |
2218 | memset (&outrel, 0, sizeof outrel); | |
2219 | else | |
2220 | { | |
f0578e28 BW |
2221 | outrel.r_offset += (input_section->output_section->vma |
2222 | + input_section->output_offset); | |
e0001a05 | 2223 | |
88d65ad6 BW |
2224 | /* Complain if the relocation is in a read-only section |
2225 | and not in a literal pool. */ | |
2226 | if ((input_section->flags & SEC_READONLY) != 0 | |
2227 | && !elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
3ba3bc8c | 2228 | outrel.r_offset)) |
88d65ad6 BW |
2229 | { |
2230 | error_message = | |
2231 | _("dynamic relocation in read-only section"); | |
2232 | if (!((*info->callbacks->reloc_dangerous) | |
2233 | (info, error_message, input_bfd, input_section, | |
2234 | rel->r_offset))) | |
2235 | return FALSE; | |
2236 | } | |
2237 | ||
e0001a05 NC |
2238 | if (dynamic_symbol) |
2239 | { | |
2240 | outrel.r_addend = rel->r_addend; | |
2241 | rel->r_addend = 0; | |
2242 | ||
2243 | if (r_type == R_XTENSA_32) | |
2244 | { | |
2245 | outrel.r_info = | |
2246 | ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT); | |
2247 | relocation = 0; | |
2248 | } | |
2249 | else /* r_type == R_XTENSA_PLT */ | |
2250 | { | |
2251 | outrel.r_info = | |
2252 | ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT); | |
2253 | ||
2254 | /* Create the PLT entry and set the initial | |
2255 | contents of the literal entry to the address of | |
2256 | the PLT entry. */ | |
43cd72b9 | 2257 | relocation = |
f0e6fdb2 | 2258 | elf_xtensa_create_plt_entry (info, output_bfd, |
e0001a05 NC |
2259 | srel->reloc_count); |
2260 | } | |
2261 | unresolved_reloc = FALSE; | |
2262 | } | |
2263 | else | |
2264 | { | |
2265 | /* Generate a RELATIVE relocation. */ | |
2266 | outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE); | |
2267 | outrel.r_addend = 0; | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | loc = (srel->contents | |
2272 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2273 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2274 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
eea6121a | 2275 | <= srel->size); |
e0001a05 NC |
2276 | } |
2277 | } | |
2278 | ||
2279 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
2280 | because such sections are not SEC_ALLOC and thus ld.so will | |
2281 | not process them. */ | |
2282 | if (unresolved_reloc | |
2283 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 2284 | && h->def_dynamic)) |
bf1747de BW |
2285 | { |
2286 | (*_bfd_error_handler) | |
2287 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
2288 | input_bfd, | |
2289 | input_section, | |
2290 | (long) rel->r_offset, | |
2291 | howto->name, | |
2292 | h->root.root.string); | |
2293 | return FALSE; | |
2294 | } | |
e0001a05 NC |
2295 | |
2296 | /* There's no point in calling bfd_perform_relocation here. | |
2297 | Just go directly to our "special function". */ | |
2298 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2299 | relocation + rel->r_addend, | |
2300 | contents, rel->r_offset, is_weak_undef, | |
2301 | &error_message); | |
43cd72b9 | 2302 | |
9b8c98a4 | 2303 | if (r != bfd_reloc_ok && !warned) |
e0001a05 NC |
2304 | { |
2305 | const char *name; | |
2306 | ||
43cd72b9 | 2307 | BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other); |
7fa3d080 | 2308 | BFD_ASSERT (error_message != NULL); |
e0001a05 | 2309 | |
7fa3d080 | 2310 | if (h) |
e0001a05 NC |
2311 | name = h->root.root.string; |
2312 | else | |
2313 | { | |
2314 | name = bfd_elf_string_from_elf_section | |
2315 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
2316 | if (name && *name == '\0') | |
2317 | name = bfd_section_name (input_bfd, sec); | |
2318 | } | |
2319 | if (name) | |
43cd72b9 BW |
2320 | { |
2321 | if (rel->r_addend == 0) | |
2322 | error_message = vsprint_msg (error_message, ": %s", | |
2323 | strlen (name) + 2, name); | |
2324 | else | |
2325 | error_message = vsprint_msg (error_message, ": (%s+0x%x)", | |
2326 | strlen (name) + 22, | |
0fd3a477 | 2327 | name, (int)rel->r_addend); |
43cd72b9 BW |
2328 | } |
2329 | ||
e0001a05 NC |
2330 | if (!((*info->callbacks->reloc_dangerous) |
2331 | (info, error_message, input_bfd, input_section, | |
2332 | rel->r_offset))) | |
2333 | return FALSE; | |
2334 | } | |
2335 | } | |
2336 | ||
88d65ad6 BW |
2337 | if (lit_table) |
2338 | free (lit_table); | |
2339 | ||
3ba3bc8c BW |
2340 | input_section->reloc_done = TRUE; |
2341 | ||
e0001a05 NC |
2342 | return TRUE; |
2343 | } | |
2344 | ||
2345 | ||
2346 | /* Finish up dynamic symbol handling. There's not much to do here since | |
2347 | the PLT and GOT entries are all set up by relocate_section. */ | |
2348 | ||
2349 | static bfd_boolean | |
7fa3d080 BW |
2350 | elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
2351 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2352 | struct elf_link_hash_entry *h, | |
2353 | Elf_Internal_Sym *sym) | |
e0001a05 | 2354 | { |
bf1747de | 2355 | if (h->needs_plt && !h->def_regular) |
e0001a05 NC |
2356 | { |
2357 | /* Mark the symbol as undefined, rather than as defined in | |
2358 | the .plt section. Leave the value alone. */ | |
2359 | sym->st_shndx = SHN_UNDEF; | |
bf1747de BW |
2360 | /* If the symbol is weak, we do need to clear the value. |
2361 | Otherwise, the PLT entry would provide a definition for | |
2362 | the symbol even if the symbol wasn't defined anywhere, | |
2363 | and so the symbol would never be NULL. */ | |
2364 | if (!h->ref_regular_nonweak) | |
2365 | sym->st_value = 0; | |
e0001a05 NC |
2366 | } |
2367 | ||
2368 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2369 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 2370 | || h == elf_hash_table (info)->hgot) |
e0001a05 NC |
2371 | sym->st_shndx = SHN_ABS; |
2372 | ||
2373 | return TRUE; | |
2374 | } | |
2375 | ||
2376 | ||
2377 | /* Combine adjacent literal table entries in the output. Adjacent | |
2378 | entries within each input section may have been removed during | |
2379 | relaxation, but we repeat the process here, even though it's too late | |
2380 | to shrink the output section, because it's important to minimize the | |
2381 | number of literal table entries to reduce the start-up work for the | |
2382 | runtime linker. Returns the number of remaining table entries or -1 | |
2383 | on error. */ | |
2384 | ||
2385 | static int | |
7fa3d080 BW |
2386 | elf_xtensa_combine_prop_entries (bfd *output_bfd, |
2387 | asection *sxtlit, | |
2388 | asection *sgotloc) | |
e0001a05 | 2389 | { |
e0001a05 NC |
2390 | bfd_byte *contents; |
2391 | property_table_entry *table; | |
e901de89 | 2392 | bfd_size_type section_size, sgotloc_size; |
e0001a05 NC |
2393 | bfd_vma offset; |
2394 | int n, m, num; | |
2395 | ||
eea6121a | 2396 | section_size = sxtlit->size; |
e0001a05 NC |
2397 | BFD_ASSERT (section_size % 8 == 0); |
2398 | num = section_size / 8; | |
2399 | ||
eea6121a | 2400 | sgotloc_size = sgotloc->size; |
e901de89 | 2401 | if (sgotloc_size != section_size) |
b536dc1e BW |
2402 | { |
2403 | (*_bfd_error_handler) | |
43cd72b9 | 2404 | (_("internal inconsistency in size of .got.loc section")); |
b536dc1e BW |
2405 | return -1; |
2406 | } | |
e901de89 | 2407 | |
eea6121a AM |
2408 | table = bfd_malloc (num * sizeof (property_table_entry)); |
2409 | if (table == 0) | |
e0001a05 NC |
2410 | return -1; |
2411 | ||
2412 | /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this | |
2413 | propagates to the output section, where it doesn't really apply and | |
eea6121a | 2414 | where it breaks the following call to bfd_malloc_and_get_section. */ |
e901de89 | 2415 | sxtlit->flags &= ~SEC_IN_MEMORY; |
e0001a05 | 2416 | |
eea6121a AM |
2417 | if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents)) |
2418 | { | |
2419 | if (contents != 0) | |
2420 | free (contents); | |
2421 | free (table); | |
2422 | return -1; | |
2423 | } | |
e0001a05 NC |
2424 | |
2425 | /* There should never be any relocations left at this point, so this | |
2426 | is quite a bit easier than what is done during relaxation. */ | |
2427 | ||
2428 | /* Copy the raw contents into a property table array and sort it. */ | |
2429 | offset = 0; | |
2430 | for (n = 0; n < num; n++) | |
2431 | { | |
2432 | table[n].address = bfd_get_32 (output_bfd, &contents[offset]); | |
2433 | table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]); | |
2434 | offset += 8; | |
2435 | } | |
2436 | qsort (table, num, sizeof (property_table_entry), property_table_compare); | |
2437 | ||
2438 | for (n = 0; n < num; n++) | |
2439 | { | |
2440 | bfd_boolean remove = FALSE; | |
2441 | ||
2442 | if (table[n].size == 0) | |
2443 | remove = TRUE; | |
2444 | else if (n > 0 && | |
2445 | (table[n-1].address + table[n-1].size == table[n].address)) | |
2446 | { | |
2447 | table[n-1].size += table[n].size; | |
2448 | remove = TRUE; | |
2449 | } | |
2450 | ||
2451 | if (remove) | |
2452 | { | |
2453 | for (m = n; m < num - 1; m++) | |
2454 | { | |
2455 | table[m].address = table[m+1].address; | |
2456 | table[m].size = table[m+1].size; | |
2457 | } | |
2458 | ||
2459 | n--; | |
2460 | num--; | |
2461 | } | |
2462 | } | |
2463 | ||
2464 | /* Copy the data back to the raw contents. */ | |
2465 | offset = 0; | |
2466 | for (n = 0; n < num; n++) | |
2467 | { | |
2468 | bfd_put_32 (output_bfd, table[n].address, &contents[offset]); | |
2469 | bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]); | |
2470 | offset += 8; | |
2471 | } | |
2472 | ||
2473 | /* Clear the removed bytes. */ | |
2474 | if ((bfd_size_type) (num * 8) < section_size) | |
b54d4b07 | 2475 | memset (&contents[num * 8], 0, section_size - num * 8); |
e0001a05 | 2476 | |
e901de89 BW |
2477 | if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0, |
2478 | section_size)) | |
e0001a05 NC |
2479 | return -1; |
2480 | ||
e901de89 BW |
2481 | /* Copy the contents to ".got.loc". */ |
2482 | memcpy (sgotloc->contents, contents, section_size); | |
2483 | ||
e0001a05 | 2484 | free (contents); |
b614a702 | 2485 | free (table); |
e0001a05 NC |
2486 | return num; |
2487 | } | |
2488 | ||
2489 | ||
2490 | /* Finish up the dynamic sections. */ | |
2491 | ||
2492 | static bfd_boolean | |
7fa3d080 BW |
2493 | elf_xtensa_finish_dynamic_sections (bfd *output_bfd, |
2494 | struct bfd_link_info *info) | |
e0001a05 | 2495 | { |
f0e6fdb2 | 2496 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 | 2497 | bfd *dynobj; |
e901de89 | 2498 | asection *sdyn, *srelplt, *sgot, *sxtlit, *sgotloc; |
e0001a05 NC |
2499 | Elf32_External_Dyn *dyncon, *dynconend; |
2500 | int num_xtlit_entries; | |
2501 | ||
2502 | if (! elf_hash_table (info)->dynamic_sections_created) | |
2503 | return TRUE; | |
2504 | ||
f0e6fdb2 | 2505 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
2506 | dynobj = elf_hash_table (info)->dynobj; |
2507 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2508 | BFD_ASSERT (sdyn != NULL); | |
2509 | ||
2510 | /* Set the first entry in the global offset table to the address of | |
2511 | the dynamic section. */ | |
f0e6fdb2 | 2512 | sgot = htab->sgot; |
e0001a05 NC |
2513 | if (sgot) |
2514 | { | |
eea6121a | 2515 | BFD_ASSERT (sgot->size == 4); |
e0001a05 | 2516 | if (sdyn == NULL) |
7fa3d080 | 2517 | bfd_put_32 (output_bfd, 0, sgot->contents); |
e0001a05 NC |
2518 | else |
2519 | bfd_put_32 (output_bfd, | |
2520 | sdyn->output_section->vma + sdyn->output_offset, | |
2521 | sgot->contents); | |
2522 | } | |
2523 | ||
f0e6fdb2 | 2524 | srelplt = htab->srelplt; |
7fa3d080 | 2525 | if (srelplt && srelplt->size != 0) |
e0001a05 NC |
2526 | { |
2527 | asection *sgotplt, *srelgot, *spltlittbl; | |
2528 | int chunk, plt_chunks, plt_entries; | |
2529 | Elf_Internal_Rela irela; | |
2530 | bfd_byte *loc; | |
2531 | unsigned rtld_reloc; | |
2532 | ||
f0e6fdb2 BW |
2533 | srelgot = htab->srelgot; |
2534 | spltlittbl = htab->spltlittbl; | |
2535 | BFD_ASSERT (srelgot != NULL && spltlittbl != NULL); | |
e0001a05 NC |
2536 | |
2537 | /* Find the first XTENSA_RTLD relocation. Presumably the rest | |
2538 | of them follow immediately after.... */ | |
2539 | for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++) | |
2540 | { | |
2541 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
2542 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2543 | if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD) | |
2544 | break; | |
2545 | } | |
2546 | BFD_ASSERT (rtld_reloc < srelgot->reloc_count); | |
2547 | ||
eea6121a | 2548 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
2549 | plt_chunks = |
2550 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
2551 | ||
2552 | for (chunk = 0; chunk < plt_chunks; chunk++) | |
2553 | { | |
2554 | int chunk_entries = 0; | |
2555 | ||
f0e6fdb2 | 2556 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
e0001a05 NC |
2557 | BFD_ASSERT (sgotplt != NULL); |
2558 | ||
2559 | /* Emit special RTLD relocations for the first two entries in | |
2560 | each chunk of the .got.plt section. */ | |
2561 | ||
2562 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
2563 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2564 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
2565 | irela.r_offset = (sgotplt->output_section->vma | |
2566 | + sgotplt->output_offset); | |
2567 | irela.r_addend = 1; /* tell rtld to set value to resolver function */ | |
2568 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
2569 | rtld_reloc += 1; | |
2570 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
2571 | ||
2572 | /* Next literal immediately follows the first. */ | |
2573 | loc += sizeof (Elf32_External_Rela); | |
2574 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2575 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
2576 | irela.r_offset = (sgotplt->output_section->vma | |
2577 | + sgotplt->output_offset + 4); | |
2578 | /* Tell rtld to set value to object's link map. */ | |
2579 | irela.r_addend = 2; | |
2580 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
2581 | rtld_reloc += 1; | |
2582 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
2583 | ||
2584 | /* Fill in the literal table. */ | |
2585 | if (chunk < plt_chunks - 1) | |
2586 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
2587 | else | |
2588 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
2589 | ||
eea6121a | 2590 | BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size); |
e0001a05 NC |
2591 | bfd_put_32 (output_bfd, |
2592 | sgotplt->output_section->vma + sgotplt->output_offset, | |
2593 | spltlittbl->contents + (chunk * 8) + 0); | |
2594 | bfd_put_32 (output_bfd, | |
2595 | 8 + (chunk_entries * 4), | |
2596 | spltlittbl->contents + (chunk * 8) + 4); | |
2597 | } | |
2598 | ||
2599 | /* All the dynamic relocations have been emitted at this point. | |
2600 | Make sure the relocation sections are the correct size. */ | |
eea6121a AM |
2601 | if (srelgot->size != (sizeof (Elf32_External_Rela) |
2602 | * srelgot->reloc_count) | |
2603 | || srelplt->size != (sizeof (Elf32_External_Rela) | |
2604 | * srelplt->reloc_count)) | |
e0001a05 NC |
2605 | abort (); |
2606 | ||
2607 | /* The .xt.lit.plt section has just been modified. This must | |
2608 | happen before the code below which combines adjacent literal | |
2609 | table entries, and the .xt.lit.plt contents have to be forced to | |
2610 | the output here. */ | |
2611 | if (! bfd_set_section_contents (output_bfd, | |
2612 | spltlittbl->output_section, | |
2613 | spltlittbl->contents, | |
2614 | spltlittbl->output_offset, | |
eea6121a | 2615 | spltlittbl->size)) |
e0001a05 NC |
2616 | return FALSE; |
2617 | /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */ | |
2618 | spltlittbl->flags &= ~SEC_HAS_CONTENTS; | |
2619 | } | |
2620 | ||
2621 | /* Combine adjacent literal table entries. */ | |
1049f94e | 2622 | BFD_ASSERT (! info->relocatable); |
e901de89 | 2623 | sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit"); |
f0e6fdb2 | 2624 | sgotloc = htab->sgotloc; |
b536dc1e | 2625 | BFD_ASSERT (sxtlit && sgotloc); |
e901de89 BW |
2626 | num_xtlit_entries = |
2627 | elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc); | |
e0001a05 NC |
2628 | if (num_xtlit_entries < 0) |
2629 | return FALSE; | |
2630 | ||
2631 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 2632 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
e0001a05 NC |
2633 | for (; dyncon < dynconend; dyncon++) |
2634 | { | |
2635 | Elf_Internal_Dyn dyn; | |
e0001a05 NC |
2636 | |
2637 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2638 | ||
2639 | switch (dyn.d_tag) | |
2640 | { | |
2641 | default: | |
2642 | break; | |
2643 | ||
2644 | case DT_XTENSA_GOT_LOC_SZ: | |
e0001a05 NC |
2645 | dyn.d_un.d_val = num_xtlit_entries; |
2646 | break; | |
2647 | ||
2648 | case DT_XTENSA_GOT_LOC_OFF: | |
e29297b7 | 2649 | dyn.d_un.d_ptr = htab->sgotloc->output_section->vma; |
f0e6fdb2 BW |
2650 | break; |
2651 | ||
e0001a05 | 2652 | case DT_PLTGOT: |
e29297b7 | 2653 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
f0e6fdb2 BW |
2654 | break; |
2655 | ||
e0001a05 | 2656 | case DT_JMPREL: |
e29297b7 | 2657 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
e0001a05 NC |
2658 | break; |
2659 | ||
2660 | case DT_PLTRELSZ: | |
e29297b7 | 2661 | dyn.d_un.d_val = htab->srelplt->output_section->size; |
e0001a05 NC |
2662 | break; |
2663 | ||
2664 | case DT_RELASZ: | |
2665 | /* Adjust RELASZ to not include JMPREL. This matches what | |
2666 | glibc expects and what is done for several other ELF | |
2667 | targets (e.g., i386, alpha), but the "correct" behavior | |
2668 | seems to be unresolved. Since the linker script arranges | |
2669 | for .rela.plt to follow all other relocation sections, we | |
2670 | don't have to worry about changing the DT_RELA entry. */ | |
f0e6fdb2 | 2671 | if (htab->srelplt) |
e29297b7 | 2672 | dyn.d_un.d_val -= htab->srelplt->output_section->size; |
e0001a05 NC |
2673 | break; |
2674 | } | |
2675 | ||
2676 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2677 | } | |
2678 | ||
2679 | return TRUE; | |
2680 | } | |
2681 | ||
2682 | \f | |
2683 | /* Functions for dealing with the e_flags field. */ | |
2684 | ||
2685 | /* Merge backend specific data from an object file to the output | |
2686 | object file when linking. */ | |
2687 | ||
2688 | static bfd_boolean | |
7fa3d080 | 2689 | elf_xtensa_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
e0001a05 NC |
2690 | { |
2691 | unsigned out_mach, in_mach; | |
2692 | flagword out_flag, in_flag; | |
2693 | ||
2694 | /* Check if we have the same endianess. */ | |
2695 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
2696 | return FALSE; | |
2697 | ||
2698 | /* Don't even pretend to support mixed-format linking. */ | |
2699 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2700 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2701 | return FALSE; | |
2702 | ||
2703 | out_flag = elf_elfheader (obfd)->e_flags; | |
2704 | in_flag = elf_elfheader (ibfd)->e_flags; | |
2705 | ||
2706 | out_mach = out_flag & EF_XTENSA_MACH; | |
2707 | in_mach = in_flag & EF_XTENSA_MACH; | |
43cd72b9 | 2708 | if (out_mach != in_mach) |
e0001a05 NC |
2709 | { |
2710 | (*_bfd_error_handler) | |
43cd72b9 | 2711 | (_("%B: incompatible machine type. Output is 0x%x. Input is 0x%x"), |
d003868e | 2712 | ibfd, out_mach, in_mach); |
e0001a05 NC |
2713 | bfd_set_error (bfd_error_wrong_format); |
2714 | return FALSE; | |
2715 | } | |
2716 | ||
2717 | if (! elf_flags_init (obfd)) | |
2718 | { | |
2719 | elf_flags_init (obfd) = TRUE; | |
2720 | elf_elfheader (obfd)->e_flags = in_flag; | |
43cd72b9 | 2721 | |
e0001a05 NC |
2722 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
2723 | && bfd_get_arch_info (obfd)->the_default) | |
2724 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
2725 | bfd_get_mach (ibfd)); | |
43cd72b9 | 2726 | |
e0001a05 NC |
2727 | return TRUE; |
2728 | } | |
2729 | ||
43cd72b9 BW |
2730 | if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN)) |
2731 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN); | |
e0001a05 | 2732 | |
43cd72b9 BW |
2733 | if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT)) |
2734 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT); | |
e0001a05 NC |
2735 | |
2736 | return TRUE; | |
2737 | } | |
2738 | ||
2739 | ||
2740 | static bfd_boolean | |
7fa3d080 | 2741 | elf_xtensa_set_private_flags (bfd *abfd, flagword flags) |
e0001a05 NC |
2742 | { |
2743 | BFD_ASSERT (!elf_flags_init (abfd) | |
2744 | || elf_elfheader (abfd)->e_flags == flags); | |
2745 | ||
2746 | elf_elfheader (abfd)->e_flags |= flags; | |
2747 | elf_flags_init (abfd) = TRUE; | |
2748 | ||
2749 | return TRUE; | |
2750 | } | |
2751 | ||
2752 | ||
e0001a05 | 2753 | static bfd_boolean |
7fa3d080 | 2754 | elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg) |
e0001a05 NC |
2755 | { |
2756 | FILE *f = (FILE *) farg; | |
2757 | flagword e_flags = elf_elfheader (abfd)->e_flags; | |
2758 | ||
2759 | fprintf (f, "\nXtensa header:\n"); | |
43cd72b9 | 2760 | if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH) |
e0001a05 NC |
2761 | fprintf (f, "\nMachine = Base\n"); |
2762 | else | |
2763 | fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH); | |
2764 | ||
2765 | fprintf (f, "Insn tables = %s\n", | |
2766 | (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false"); | |
2767 | ||
2768 | fprintf (f, "Literal tables = %s\n", | |
2769 | (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false"); | |
2770 | ||
2771 | return _bfd_elf_print_private_bfd_data (abfd, farg); | |
2772 | } | |
2773 | ||
2774 | ||
2775 | /* Set the right machine number for an Xtensa ELF file. */ | |
2776 | ||
2777 | static bfd_boolean | |
7fa3d080 | 2778 | elf_xtensa_object_p (bfd *abfd) |
e0001a05 NC |
2779 | { |
2780 | int mach; | |
2781 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH; | |
2782 | ||
2783 | switch (arch) | |
2784 | { | |
2785 | case E_XTENSA_MACH: | |
2786 | mach = bfd_mach_xtensa; | |
2787 | break; | |
2788 | default: | |
2789 | return FALSE; | |
2790 | } | |
2791 | ||
2792 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach); | |
2793 | return TRUE; | |
2794 | } | |
2795 | ||
2796 | ||
2797 | /* The final processing done just before writing out an Xtensa ELF object | |
2798 | file. This gets the Xtensa architecture right based on the machine | |
2799 | number. */ | |
2800 | ||
2801 | static void | |
7fa3d080 BW |
2802 | elf_xtensa_final_write_processing (bfd *abfd, |
2803 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
e0001a05 NC |
2804 | { |
2805 | int mach; | |
2806 | unsigned long val; | |
2807 | ||
2808 | switch (mach = bfd_get_mach (abfd)) | |
2809 | { | |
2810 | case bfd_mach_xtensa: | |
2811 | val = E_XTENSA_MACH; | |
2812 | break; | |
2813 | default: | |
2814 | return; | |
2815 | } | |
2816 | ||
2817 | elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH); | |
2818 | elf_elfheader (abfd)->e_flags |= val; | |
2819 | } | |
2820 | ||
2821 | ||
2822 | static enum elf_reloc_type_class | |
7fa3d080 | 2823 | elf_xtensa_reloc_type_class (const Elf_Internal_Rela *rela) |
e0001a05 NC |
2824 | { |
2825 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2826 | { | |
2827 | case R_XTENSA_RELATIVE: | |
2828 | return reloc_class_relative; | |
2829 | case R_XTENSA_JMP_SLOT: | |
2830 | return reloc_class_plt; | |
2831 | default: | |
2832 | return reloc_class_normal; | |
2833 | } | |
2834 | } | |
2835 | ||
2836 | \f | |
2837 | static bfd_boolean | |
7fa3d080 BW |
2838 | elf_xtensa_discard_info_for_section (bfd *abfd, |
2839 | struct elf_reloc_cookie *cookie, | |
2840 | struct bfd_link_info *info, | |
2841 | asection *sec) | |
e0001a05 NC |
2842 | { |
2843 | bfd_byte *contents; | |
2844 | bfd_vma section_size; | |
2845 | bfd_vma offset, actual_offset; | |
1d25768e BW |
2846 | bfd_size_type removed_bytes = 0; |
2847 | bfd_size_type entry_size; | |
e0001a05 NC |
2848 | |
2849 | if (sec->output_section | |
2850 | && bfd_is_abs_section (sec->output_section)) | |
2851 | return FALSE; | |
2852 | ||
1d25768e BW |
2853 | if (xtensa_is_proptable_section (sec)) |
2854 | entry_size = 12; | |
2855 | else | |
2856 | entry_size = 8; | |
2857 | ||
2858 | section_size = sec->size; | |
2859 | if (section_size == 0 || section_size % entry_size != 0) | |
2860 | return FALSE; | |
2861 | ||
e0001a05 NC |
2862 | contents = retrieve_contents (abfd, sec, info->keep_memory); |
2863 | if (!contents) | |
2864 | return FALSE; | |
2865 | ||
2866 | cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory); | |
2867 | if (!cookie->rels) | |
2868 | { | |
2869 | release_contents (sec, contents); | |
2870 | return FALSE; | |
2871 | } | |
2872 | ||
1d25768e BW |
2873 | /* Sort the relocations. They should already be in order when |
2874 | relaxation is enabled, but it might not be. */ | |
2875 | qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
2876 | internal_reloc_compare); | |
2877 | ||
e0001a05 NC |
2878 | cookie->rel = cookie->rels; |
2879 | cookie->relend = cookie->rels + sec->reloc_count; | |
2880 | ||
1d25768e | 2881 | for (offset = 0; offset < section_size; offset += entry_size) |
e0001a05 NC |
2882 | { |
2883 | actual_offset = offset - removed_bytes; | |
2884 | ||
2885 | /* The ...symbol_deleted_p function will skip over relocs but it | |
2886 | won't adjust their offsets, so do that here. */ | |
2887 | while (cookie->rel < cookie->relend | |
2888 | && cookie->rel->r_offset < offset) | |
2889 | { | |
2890 | cookie->rel->r_offset -= removed_bytes; | |
2891 | cookie->rel++; | |
2892 | } | |
2893 | ||
2894 | while (cookie->rel < cookie->relend | |
2895 | && cookie->rel->r_offset == offset) | |
2896 | { | |
c152c796 | 2897 | if (bfd_elf_reloc_symbol_deleted_p (offset, cookie)) |
e0001a05 NC |
2898 | { |
2899 | /* Remove the table entry. (If the reloc type is NONE, then | |
2900 | the entry has already been merged with another and deleted | |
2901 | during relaxation.) */ | |
2902 | if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE) | |
2903 | { | |
2904 | /* Shift the contents up. */ | |
1d25768e | 2905 | if (offset + entry_size < section_size) |
e0001a05 | 2906 | memmove (&contents[actual_offset], |
1d25768e BW |
2907 | &contents[actual_offset + entry_size], |
2908 | section_size - offset - entry_size); | |
2909 | removed_bytes += entry_size; | |
e0001a05 NC |
2910 | } |
2911 | ||
2912 | /* Remove this relocation. */ | |
2913 | cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
2914 | } | |
2915 | ||
2916 | /* Adjust the relocation offset for previous removals. This | |
2917 | should not be done before calling ...symbol_deleted_p | |
2918 | because it might mess up the offset comparisons there. | |
2919 | Make sure the offset doesn't underflow in the case where | |
2920 | the first entry is removed. */ | |
2921 | if (cookie->rel->r_offset >= removed_bytes) | |
2922 | cookie->rel->r_offset -= removed_bytes; | |
2923 | else | |
2924 | cookie->rel->r_offset = 0; | |
2925 | ||
2926 | cookie->rel++; | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | if (removed_bytes != 0) | |
2931 | { | |
2932 | /* Adjust any remaining relocs (shouldn't be any). */ | |
2933 | for (; cookie->rel < cookie->relend; cookie->rel++) | |
2934 | { | |
2935 | if (cookie->rel->r_offset >= removed_bytes) | |
2936 | cookie->rel->r_offset -= removed_bytes; | |
2937 | else | |
2938 | cookie->rel->r_offset = 0; | |
2939 | } | |
2940 | ||
2941 | /* Clear the removed bytes. */ | |
2942 | memset (&contents[section_size - removed_bytes], 0, removed_bytes); | |
2943 | ||
2944 | pin_contents (sec, contents); | |
2945 | pin_internal_relocs (sec, cookie->rels); | |
2946 | ||
eea6121a AM |
2947 | /* Shrink size. */ |
2948 | sec->size = section_size - removed_bytes; | |
b536dc1e BW |
2949 | |
2950 | if (xtensa_is_littable_section (sec)) | |
2951 | { | |
f0e6fdb2 BW |
2952 | asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc; |
2953 | if (sgotloc) | |
2954 | sgotloc->size -= removed_bytes; | |
b536dc1e | 2955 | } |
e0001a05 NC |
2956 | } |
2957 | else | |
2958 | { | |
2959 | release_contents (sec, contents); | |
2960 | release_internal_relocs (sec, cookie->rels); | |
2961 | } | |
2962 | ||
2963 | return (removed_bytes != 0); | |
2964 | } | |
2965 | ||
2966 | ||
2967 | static bfd_boolean | |
7fa3d080 BW |
2968 | elf_xtensa_discard_info (bfd *abfd, |
2969 | struct elf_reloc_cookie *cookie, | |
2970 | struct bfd_link_info *info) | |
e0001a05 NC |
2971 | { |
2972 | asection *sec; | |
2973 | bfd_boolean changed = FALSE; | |
2974 | ||
2975 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
2976 | { | |
2977 | if (xtensa_is_property_section (sec)) | |
2978 | { | |
2979 | if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)) | |
2980 | changed = TRUE; | |
2981 | } | |
2982 | } | |
2983 | ||
2984 | return changed; | |
2985 | } | |
2986 | ||
2987 | ||
2988 | static bfd_boolean | |
7fa3d080 | 2989 | elf_xtensa_ignore_discarded_relocs (asection *sec) |
e0001a05 NC |
2990 | { |
2991 | return xtensa_is_property_section (sec); | |
2992 | } | |
2993 | ||
a77dc2cc BW |
2994 | |
2995 | static unsigned int | |
2996 | elf_xtensa_action_discarded (asection *sec) | |
2997 | { | |
2998 | if (strcmp (".xt_except_table", sec->name) == 0) | |
2999 | return 0; | |
3000 | ||
3001 | if (strcmp (".xt_except_desc", sec->name) == 0) | |
3002 | return 0; | |
3003 | ||
3004 | return _bfd_elf_default_action_discarded (sec); | |
3005 | } | |
3006 | ||
e0001a05 NC |
3007 | \f |
3008 | /* Support for core dump NOTE sections. */ | |
3009 | ||
3010 | static bfd_boolean | |
7fa3d080 | 3011 | elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3012 | { |
3013 | int offset; | |
eea6121a | 3014 | unsigned int size; |
e0001a05 NC |
3015 | |
3016 | /* The size for Xtensa is variable, so don't try to recognize the format | |
3017 | based on the size. Just assume this is GNU/Linux. */ | |
3018 | ||
3019 | /* pr_cursig */ | |
3020 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3021 | ||
3022 | /* pr_pid */ | |
3023 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3024 | ||
3025 | /* pr_reg */ | |
3026 | offset = 72; | |
eea6121a | 3027 | size = note->descsz - offset - 4; |
e0001a05 NC |
3028 | |
3029 | /* Make a ".reg/999" section. */ | |
3030 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3031 | size, note->descpos + offset); |
e0001a05 NC |
3032 | } |
3033 | ||
3034 | ||
3035 | static bfd_boolean | |
7fa3d080 | 3036 | elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3037 | { |
3038 | switch (note->descsz) | |
3039 | { | |
3040 | default: | |
3041 | return FALSE; | |
3042 | ||
3043 | case 128: /* GNU/Linux elf_prpsinfo */ | |
3044 | elf_tdata (abfd)->core_program | |
3045 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
3046 | elf_tdata (abfd)->core_command | |
3047 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
3048 | } | |
3049 | ||
3050 | /* Note that for some reason, a spurious space is tacked | |
3051 | onto the end of the args in some (at least one anyway) | |
3052 | implementations, so strip it off if it exists. */ | |
3053 | ||
3054 | { | |
3055 | char *command = elf_tdata (abfd)->core_command; | |
3056 | int n = strlen (command); | |
3057 | ||
3058 | if (0 < n && command[n - 1] == ' ') | |
3059 | command[n - 1] = '\0'; | |
3060 | } | |
3061 | ||
3062 | return TRUE; | |
3063 | } | |
3064 | ||
3065 | \f | |
3066 | /* Generic Xtensa configurability stuff. */ | |
3067 | ||
3068 | static xtensa_opcode callx0_op = XTENSA_UNDEFINED; | |
3069 | static xtensa_opcode callx4_op = XTENSA_UNDEFINED; | |
3070 | static xtensa_opcode callx8_op = XTENSA_UNDEFINED; | |
3071 | static xtensa_opcode callx12_op = XTENSA_UNDEFINED; | |
3072 | static xtensa_opcode call0_op = XTENSA_UNDEFINED; | |
3073 | static xtensa_opcode call4_op = XTENSA_UNDEFINED; | |
3074 | static xtensa_opcode call8_op = XTENSA_UNDEFINED; | |
3075 | static xtensa_opcode call12_op = XTENSA_UNDEFINED; | |
3076 | ||
3077 | static void | |
7fa3d080 | 3078 | init_call_opcodes (void) |
e0001a05 NC |
3079 | { |
3080 | if (callx0_op == XTENSA_UNDEFINED) | |
3081 | { | |
3082 | callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0"); | |
3083 | callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4"); | |
3084 | callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8"); | |
3085 | callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12"); | |
3086 | call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0"); | |
3087 | call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4"); | |
3088 | call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8"); | |
3089 | call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12"); | |
3090 | } | |
3091 | } | |
3092 | ||
3093 | ||
3094 | static bfd_boolean | |
7fa3d080 | 3095 | is_indirect_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3096 | { |
3097 | init_call_opcodes (); | |
3098 | return (opcode == callx0_op | |
3099 | || opcode == callx4_op | |
3100 | || opcode == callx8_op | |
3101 | || opcode == callx12_op); | |
3102 | } | |
3103 | ||
3104 | ||
3105 | static bfd_boolean | |
7fa3d080 | 3106 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3107 | { |
3108 | init_call_opcodes (); | |
3109 | return (opcode == call0_op | |
3110 | || opcode == call4_op | |
3111 | || opcode == call8_op | |
3112 | || opcode == call12_op); | |
3113 | } | |
3114 | ||
3115 | ||
3116 | static bfd_boolean | |
7fa3d080 | 3117 | is_windowed_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3118 | { |
3119 | init_call_opcodes (); | |
3120 | return (opcode == call4_op | |
3121 | || opcode == call8_op | |
3122 | || opcode == call12_op | |
3123 | || opcode == callx4_op | |
3124 | || opcode == callx8_op | |
3125 | || opcode == callx12_op); | |
3126 | } | |
3127 | ||
3128 | ||
43cd72b9 BW |
3129 | static xtensa_opcode |
3130 | get_const16_opcode (void) | |
3131 | { | |
3132 | static bfd_boolean done_lookup = FALSE; | |
3133 | static xtensa_opcode const16_opcode = XTENSA_UNDEFINED; | |
3134 | if (!done_lookup) | |
3135 | { | |
3136 | const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16"); | |
3137 | done_lookup = TRUE; | |
3138 | } | |
3139 | return const16_opcode; | |
3140 | } | |
3141 | ||
3142 | ||
e0001a05 NC |
3143 | static xtensa_opcode |
3144 | get_l32r_opcode (void) | |
3145 | { | |
3146 | static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED; | |
43cd72b9 BW |
3147 | static bfd_boolean done_lookup = FALSE; |
3148 | ||
3149 | if (!done_lookup) | |
e0001a05 NC |
3150 | { |
3151 | l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r"); | |
43cd72b9 | 3152 | done_lookup = TRUE; |
e0001a05 NC |
3153 | } |
3154 | return l32r_opcode; | |
3155 | } | |
3156 | ||
3157 | ||
3158 | static bfd_vma | |
7fa3d080 | 3159 | l32r_offset (bfd_vma addr, bfd_vma pc) |
e0001a05 NC |
3160 | { |
3161 | bfd_vma offset; | |
3162 | ||
3163 | offset = addr - ((pc+3) & -4); | |
3164 | BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0); | |
3165 | offset = (signed int) offset >> 2; | |
3166 | BFD_ASSERT ((signed int) offset >> 16 == -1); | |
3167 | return offset; | |
3168 | } | |
3169 | ||
3170 | ||
e0001a05 | 3171 | static int |
7fa3d080 | 3172 | get_relocation_opnd (xtensa_opcode opcode, int r_type) |
e0001a05 | 3173 | { |
43cd72b9 BW |
3174 | xtensa_isa isa = xtensa_default_isa; |
3175 | int last_immed, last_opnd, opi; | |
3176 | ||
3177 | if (opcode == XTENSA_UNDEFINED) | |
3178 | return XTENSA_UNDEFINED; | |
3179 | ||
3180 | /* Find the last visible PC-relative immediate operand for the opcode. | |
3181 | If there are no PC-relative immediates, then choose the last visible | |
3182 | immediate; otherwise, fail and return XTENSA_UNDEFINED. */ | |
3183 | last_immed = XTENSA_UNDEFINED; | |
3184 | last_opnd = xtensa_opcode_num_operands (isa, opcode); | |
3185 | for (opi = last_opnd - 1; opi >= 0; opi--) | |
3186 | { | |
3187 | if (xtensa_operand_is_visible (isa, opcode, opi) == 0) | |
3188 | continue; | |
3189 | if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1) | |
3190 | { | |
3191 | last_immed = opi; | |
3192 | break; | |
3193 | } | |
3194 | if (last_immed == XTENSA_UNDEFINED | |
3195 | && xtensa_operand_is_register (isa, opcode, opi) == 0) | |
3196 | last_immed = opi; | |
3197 | } | |
3198 | if (last_immed < 0) | |
3199 | return XTENSA_UNDEFINED; | |
3200 | ||
3201 | /* If the operand number was specified in an old-style relocation, | |
3202 | check for consistency with the operand computed above. */ | |
3203 | if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2) | |
3204 | { | |
3205 | int reloc_opnd = r_type - R_XTENSA_OP0; | |
3206 | if (reloc_opnd != last_immed) | |
3207 | return XTENSA_UNDEFINED; | |
3208 | } | |
3209 | ||
3210 | return last_immed; | |
3211 | } | |
3212 | ||
3213 | ||
3214 | int | |
7fa3d080 | 3215 | get_relocation_slot (int r_type) |
43cd72b9 BW |
3216 | { |
3217 | switch (r_type) | |
3218 | { | |
3219 | case R_XTENSA_OP0: | |
3220 | case R_XTENSA_OP1: | |
3221 | case R_XTENSA_OP2: | |
3222 | return 0; | |
3223 | ||
3224 | default: | |
3225 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3226 | return r_type - R_XTENSA_SLOT0_OP; | |
3227 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3228 | return r_type - R_XTENSA_SLOT0_ALT; | |
3229 | break; | |
3230 | } | |
3231 | ||
3232 | return XTENSA_UNDEFINED; | |
e0001a05 NC |
3233 | } |
3234 | ||
3235 | ||
3236 | /* Get the opcode for a relocation. */ | |
3237 | ||
3238 | static xtensa_opcode | |
7fa3d080 BW |
3239 | get_relocation_opcode (bfd *abfd, |
3240 | asection *sec, | |
3241 | bfd_byte *contents, | |
3242 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3243 | { |
3244 | static xtensa_insnbuf ibuff = NULL; | |
43cd72b9 | 3245 | static xtensa_insnbuf sbuff = NULL; |
e0001a05 | 3246 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
3247 | xtensa_format fmt; |
3248 | int slot; | |
e0001a05 NC |
3249 | |
3250 | if (contents == NULL) | |
3251 | return XTENSA_UNDEFINED; | |
3252 | ||
43cd72b9 | 3253 | if (bfd_get_section_limit (abfd, sec) <= irel->r_offset) |
e0001a05 NC |
3254 | return XTENSA_UNDEFINED; |
3255 | ||
3256 | if (ibuff == NULL) | |
43cd72b9 BW |
3257 | { |
3258 | ibuff = xtensa_insnbuf_alloc (isa); | |
3259 | sbuff = xtensa_insnbuf_alloc (isa); | |
3260 | } | |
3261 | ||
e0001a05 | 3262 | /* Decode the instruction. */ |
43cd72b9 BW |
3263 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset], |
3264 | sec->size - irel->r_offset); | |
3265 | fmt = xtensa_format_decode (isa, ibuff); | |
3266 | slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info)); | |
3267 | if (slot == XTENSA_UNDEFINED) | |
3268 | return XTENSA_UNDEFINED; | |
3269 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); | |
3270 | return xtensa_opcode_decode (isa, fmt, slot, sbuff); | |
e0001a05 NC |
3271 | } |
3272 | ||
3273 | ||
3274 | bfd_boolean | |
7fa3d080 BW |
3275 | is_l32r_relocation (bfd *abfd, |
3276 | asection *sec, | |
3277 | bfd_byte *contents, | |
3278 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3279 | { |
3280 | xtensa_opcode opcode; | |
43cd72b9 | 3281 | if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info))) |
e0001a05 | 3282 | return FALSE; |
43cd72b9 | 3283 | opcode = get_relocation_opcode (abfd, sec, contents, irel); |
e0001a05 NC |
3284 | return (opcode == get_l32r_opcode ()); |
3285 | } | |
3286 | ||
e0001a05 | 3287 | |
43cd72b9 | 3288 | static bfd_size_type |
7fa3d080 BW |
3289 | get_asm_simplify_size (bfd_byte *contents, |
3290 | bfd_size_type content_len, | |
3291 | bfd_size_type offset) | |
e0001a05 | 3292 | { |
43cd72b9 | 3293 | bfd_size_type insnlen, size = 0; |
e0001a05 | 3294 | |
43cd72b9 BW |
3295 | /* Decode the size of the next two instructions. */ |
3296 | insnlen = insn_decode_len (contents, content_len, offset); | |
3297 | if (insnlen == 0) | |
3298 | return 0; | |
e0001a05 | 3299 | |
43cd72b9 | 3300 | size += insnlen; |
e0001a05 | 3301 | |
43cd72b9 BW |
3302 | insnlen = insn_decode_len (contents, content_len, offset + size); |
3303 | if (insnlen == 0) | |
3304 | return 0; | |
e0001a05 | 3305 | |
43cd72b9 BW |
3306 | size += insnlen; |
3307 | return size; | |
3308 | } | |
e0001a05 | 3309 | |
43cd72b9 BW |
3310 | |
3311 | bfd_boolean | |
7fa3d080 | 3312 | is_alt_relocation (int r_type) |
43cd72b9 BW |
3313 | { |
3314 | return (r_type >= R_XTENSA_SLOT0_ALT | |
3315 | && r_type <= R_XTENSA_SLOT14_ALT); | |
e0001a05 NC |
3316 | } |
3317 | ||
3318 | ||
43cd72b9 | 3319 | bfd_boolean |
7fa3d080 | 3320 | is_operand_relocation (int r_type) |
e0001a05 | 3321 | { |
43cd72b9 BW |
3322 | switch (r_type) |
3323 | { | |
3324 | case R_XTENSA_OP0: | |
3325 | case R_XTENSA_OP1: | |
3326 | case R_XTENSA_OP2: | |
3327 | return TRUE; | |
e0001a05 | 3328 | |
43cd72b9 BW |
3329 | default: |
3330 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3331 | return TRUE; | |
3332 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3333 | return TRUE; | |
3334 | break; | |
3335 | } | |
e0001a05 | 3336 | |
43cd72b9 | 3337 | return FALSE; |
e0001a05 NC |
3338 | } |
3339 | ||
43cd72b9 BW |
3340 | |
3341 | #define MIN_INSN_LENGTH 2 | |
e0001a05 | 3342 | |
43cd72b9 BW |
3343 | /* Return 0 if it fails to decode. */ |
3344 | ||
3345 | bfd_size_type | |
7fa3d080 BW |
3346 | insn_decode_len (bfd_byte *contents, |
3347 | bfd_size_type content_len, | |
3348 | bfd_size_type offset) | |
e0001a05 | 3349 | { |
43cd72b9 BW |
3350 | int insn_len; |
3351 | xtensa_isa isa = xtensa_default_isa; | |
3352 | xtensa_format fmt; | |
3353 | static xtensa_insnbuf ibuff = NULL; | |
e0001a05 | 3354 | |
43cd72b9 BW |
3355 | if (offset + MIN_INSN_LENGTH > content_len) |
3356 | return 0; | |
e0001a05 | 3357 | |
43cd72b9 BW |
3358 | if (ibuff == NULL) |
3359 | ibuff = xtensa_insnbuf_alloc (isa); | |
3360 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset], | |
3361 | content_len - offset); | |
3362 | fmt = xtensa_format_decode (isa, ibuff); | |
3363 | if (fmt == XTENSA_UNDEFINED) | |
3364 | return 0; | |
3365 | insn_len = xtensa_format_length (isa, fmt); | |
3366 | if (insn_len == XTENSA_UNDEFINED) | |
3367 | return 0; | |
3368 | return insn_len; | |
e0001a05 NC |
3369 | } |
3370 | ||
3371 | ||
43cd72b9 BW |
3372 | /* Decode the opcode for a single slot instruction. |
3373 | Return 0 if it fails to decode or the instruction is multi-slot. */ | |
e0001a05 | 3374 | |
43cd72b9 | 3375 | xtensa_opcode |
7fa3d080 BW |
3376 | insn_decode_opcode (bfd_byte *contents, |
3377 | bfd_size_type content_len, | |
3378 | bfd_size_type offset, | |
3379 | int slot) | |
e0001a05 | 3380 | { |
e0001a05 | 3381 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
3382 | xtensa_format fmt; |
3383 | static xtensa_insnbuf insnbuf = NULL; | |
3384 | static xtensa_insnbuf slotbuf = NULL; | |
3385 | ||
3386 | if (offset + MIN_INSN_LENGTH > content_len) | |
e0001a05 NC |
3387 | return XTENSA_UNDEFINED; |
3388 | ||
3389 | if (insnbuf == NULL) | |
43cd72b9 BW |
3390 | { |
3391 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3392 | slotbuf = xtensa_insnbuf_alloc (isa); | |
3393 | } | |
3394 | ||
3395 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3396 | content_len - offset); | |
3397 | fmt = xtensa_format_decode (isa, insnbuf); | |
3398 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 3399 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
3400 | |
3401 | if (slot >= xtensa_format_num_slots (isa, fmt)) | |
e0001a05 | 3402 | return XTENSA_UNDEFINED; |
e0001a05 | 3403 | |
43cd72b9 BW |
3404 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
3405 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
3406 | } | |
e0001a05 | 3407 | |
e0001a05 | 3408 | |
43cd72b9 BW |
3409 | /* The offset is the offset in the contents. |
3410 | The address is the address of that offset. */ | |
e0001a05 | 3411 | |
43cd72b9 | 3412 | static bfd_boolean |
7fa3d080 BW |
3413 | check_branch_target_aligned (bfd_byte *contents, |
3414 | bfd_size_type content_length, | |
3415 | bfd_vma offset, | |
3416 | bfd_vma address) | |
43cd72b9 BW |
3417 | { |
3418 | bfd_size_type insn_len = insn_decode_len (contents, content_length, offset); | |
3419 | if (insn_len == 0) | |
3420 | return FALSE; | |
3421 | return check_branch_target_aligned_address (address, insn_len); | |
3422 | } | |
e0001a05 | 3423 | |
e0001a05 | 3424 | |
43cd72b9 | 3425 | static bfd_boolean |
7fa3d080 BW |
3426 | check_loop_aligned (bfd_byte *contents, |
3427 | bfd_size_type content_length, | |
3428 | bfd_vma offset, | |
3429 | bfd_vma address) | |
e0001a05 | 3430 | { |
43cd72b9 | 3431 | bfd_size_type loop_len, insn_len; |
64b607e6 | 3432 | xtensa_opcode opcode; |
e0001a05 | 3433 | |
64b607e6 BW |
3434 | opcode = insn_decode_opcode (contents, content_length, offset, 0); |
3435 | if (opcode == XTENSA_UNDEFINED | |
3436 | || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1) | |
3437 | { | |
3438 | BFD_ASSERT (FALSE); | |
3439 | return FALSE; | |
3440 | } | |
3441 | ||
43cd72b9 | 3442 | loop_len = insn_decode_len (contents, content_length, offset); |
43cd72b9 | 3443 | insn_len = insn_decode_len (contents, content_length, offset + loop_len); |
64b607e6 BW |
3444 | if (loop_len == 0 || insn_len == 0) |
3445 | { | |
3446 | BFD_ASSERT (FALSE); | |
3447 | return FALSE; | |
3448 | } | |
e0001a05 | 3449 | |
43cd72b9 BW |
3450 | return check_branch_target_aligned_address (address + loop_len, insn_len); |
3451 | } | |
e0001a05 | 3452 | |
e0001a05 NC |
3453 | |
3454 | static bfd_boolean | |
7fa3d080 | 3455 | check_branch_target_aligned_address (bfd_vma addr, int len) |
e0001a05 | 3456 | { |
43cd72b9 BW |
3457 | if (len == 8) |
3458 | return (addr % 8 == 0); | |
3459 | return ((addr >> 2) == ((addr + len - 1) >> 2)); | |
e0001a05 NC |
3460 | } |
3461 | ||
43cd72b9 BW |
3462 | \f |
3463 | /* Instruction widening and narrowing. */ | |
e0001a05 | 3464 | |
7fa3d080 BW |
3465 | /* When FLIX is available we need to access certain instructions only |
3466 | when they are 16-bit or 24-bit instructions. This table caches | |
3467 | information about such instructions by walking through all the | |
3468 | opcodes and finding the smallest single-slot format into which each | |
3469 | can be encoded. */ | |
3470 | ||
3471 | static xtensa_format *op_single_fmt_table = NULL; | |
e0001a05 NC |
3472 | |
3473 | ||
7fa3d080 BW |
3474 | static void |
3475 | init_op_single_format_table (void) | |
e0001a05 | 3476 | { |
7fa3d080 BW |
3477 | xtensa_isa isa = xtensa_default_isa; |
3478 | xtensa_insnbuf ibuf; | |
3479 | xtensa_opcode opcode; | |
3480 | xtensa_format fmt; | |
3481 | int num_opcodes; | |
3482 | ||
3483 | if (op_single_fmt_table) | |
3484 | return; | |
3485 | ||
3486 | ibuf = xtensa_insnbuf_alloc (isa); | |
3487 | num_opcodes = xtensa_isa_num_opcodes (isa); | |
3488 | ||
3489 | op_single_fmt_table = (xtensa_format *) | |
3490 | bfd_malloc (sizeof (xtensa_format) * num_opcodes); | |
3491 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
3492 | { | |
3493 | op_single_fmt_table[opcode] = XTENSA_UNDEFINED; | |
3494 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
3495 | { | |
3496 | if (xtensa_format_num_slots (isa, fmt) == 1 | |
3497 | && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0) | |
3498 | { | |
3499 | xtensa_opcode old_fmt = op_single_fmt_table[opcode]; | |
3500 | int fmt_length = xtensa_format_length (isa, fmt); | |
3501 | if (old_fmt == XTENSA_UNDEFINED | |
3502 | || fmt_length < xtensa_format_length (isa, old_fmt)) | |
3503 | op_single_fmt_table[opcode] = fmt; | |
3504 | } | |
3505 | } | |
3506 | } | |
3507 | xtensa_insnbuf_free (isa, ibuf); | |
3508 | } | |
3509 | ||
3510 | ||
3511 | static xtensa_format | |
3512 | get_single_format (xtensa_opcode opcode) | |
3513 | { | |
3514 | init_op_single_format_table (); | |
3515 | return op_single_fmt_table[opcode]; | |
3516 | } | |
e0001a05 | 3517 | |
e0001a05 | 3518 | |
43cd72b9 BW |
3519 | /* For the set of narrowable instructions we do NOT include the |
3520 | narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities | |
3521 | involved during linker relaxation that may require these to | |
3522 | re-expand in some conditions. Also, the narrowing "or" -> mov.n | |
3523 | requires special case code to ensure it only works when op1 == op2. */ | |
e0001a05 | 3524 | |
7fa3d080 BW |
3525 | struct string_pair |
3526 | { | |
3527 | const char *wide; | |
3528 | const char *narrow; | |
3529 | }; | |
3530 | ||
43cd72b9 | 3531 | struct string_pair narrowable[] = |
e0001a05 | 3532 | { |
43cd72b9 BW |
3533 | { "add", "add.n" }, |
3534 | { "addi", "addi.n" }, | |
3535 | { "addmi", "addi.n" }, | |
3536 | { "l32i", "l32i.n" }, | |
3537 | { "movi", "movi.n" }, | |
3538 | { "ret", "ret.n" }, | |
3539 | { "retw", "retw.n" }, | |
3540 | { "s32i", "s32i.n" }, | |
3541 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
3542 | }; | |
e0001a05 | 3543 | |
43cd72b9 | 3544 | struct string_pair widenable[] = |
e0001a05 | 3545 | { |
43cd72b9 BW |
3546 | { "add", "add.n" }, |
3547 | { "addi", "addi.n" }, | |
3548 | { "addmi", "addi.n" }, | |
3549 | { "beqz", "beqz.n" }, | |
3550 | { "bnez", "bnez.n" }, | |
3551 | { "l32i", "l32i.n" }, | |
3552 | { "movi", "movi.n" }, | |
3553 | { "ret", "ret.n" }, | |
3554 | { "retw", "retw.n" }, | |
3555 | { "s32i", "s32i.n" }, | |
3556 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
3557 | }; | |
e0001a05 NC |
3558 | |
3559 | ||
64b607e6 BW |
3560 | /* Check if an instruction can be "narrowed", i.e., changed from a standard |
3561 | 3-byte instruction to a 2-byte "density" instruction. If it is valid, | |
3562 | return the instruction buffer holding the narrow instruction. Otherwise, | |
3563 | return 0. The set of valid narrowing are specified by a string table | |
43cd72b9 BW |
3564 | but require some special case operand checks in some cases. */ |
3565 | ||
64b607e6 BW |
3566 | static xtensa_insnbuf |
3567 | can_narrow_instruction (xtensa_insnbuf slotbuf, | |
3568 | xtensa_format fmt, | |
3569 | xtensa_opcode opcode) | |
e0001a05 | 3570 | { |
43cd72b9 | 3571 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
3572 | xtensa_format o_fmt; |
3573 | unsigned opi; | |
e0001a05 | 3574 | |
43cd72b9 BW |
3575 | static xtensa_insnbuf o_insnbuf = NULL; |
3576 | static xtensa_insnbuf o_slotbuf = NULL; | |
e0001a05 | 3577 | |
64b607e6 | 3578 | if (o_insnbuf == NULL) |
43cd72b9 | 3579 | { |
43cd72b9 BW |
3580 | o_insnbuf = xtensa_insnbuf_alloc (isa); |
3581 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
3582 | } | |
e0001a05 | 3583 | |
64b607e6 | 3584 | for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++) |
43cd72b9 BW |
3585 | { |
3586 | bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0); | |
e0001a05 | 3587 | |
43cd72b9 BW |
3588 | if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide)) |
3589 | { | |
3590 | uint32 value, newval; | |
3591 | int i, operand_count, o_operand_count; | |
3592 | xtensa_opcode o_opcode; | |
e0001a05 | 3593 | |
43cd72b9 BW |
3594 | /* Address does not matter in this case. We might need to |
3595 | fix it to handle branches/jumps. */ | |
3596 | bfd_vma self_address = 0; | |
e0001a05 | 3597 | |
43cd72b9 BW |
3598 | o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow); |
3599 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 3600 | return 0; |
43cd72b9 BW |
3601 | o_fmt = get_single_format (o_opcode); |
3602 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 3603 | return 0; |
e0001a05 | 3604 | |
43cd72b9 BW |
3605 | if (xtensa_format_length (isa, fmt) != 3 |
3606 | || xtensa_format_length (isa, o_fmt) != 2) | |
64b607e6 | 3607 | return 0; |
e0001a05 | 3608 | |
43cd72b9 BW |
3609 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
3610 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
3611 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
e0001a05 | 3612 | |
43cd72b9 | 3613 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 3614 | return 0; |
e0001a05 | 3615 | |
43cd72b9 BW |
3616 | if (!is_or) |
3617 | { | |
3618 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 3619 | return 0; |
43cd72b9 BW |
3620 | } |
3621 | else | |
3622 | { | |
3623 | uint32 rawval0, rawval1, rawval2; | |
e0001a05 | 3624 | |
64b607e6 BW |
3625 | if (o_operand_count + 1 != operand_count |
3626 | || xtensa_operand_get_field (isa, opcode, 0, | |
3627 | fmt, 0, slotbuf, &rawval0) != 0 | |
3628 | || xtensa_operand_get_field (isa, opcode, 1, | |
3629 | fmt, 0, slotbuf, &rawval1) != 0 | |
3630 | || xtensa_operand_get_field (isa, opcode, 2, | |
3631 | fmt, 0, slotbuf, &rawval2) != 0 | |
3632 | || rawval1 != rawval2 | |
3633 | || rawval0 == rawval1 /* it is a nop */) | |
3634 | return 0; | |
43cd72b9 | 3635 | } |
e0001a05 | 3636 | |
43cd72b9 BW |
3637 | for (i = 0; i < o_operand_count; ++i) |
3638 | { | |
3639 | if (xtensa_operand_get_field (isa, opcode, i, fmt, 0, | |
3640 | slotbuf, &value) | |
3641 | || xtensa_operand_decode (isa, opcode, i, &value)) | |
64b607e6 | 3642 | return 0; |
e0001a05 | 3643 | |
43cd72b9 BW |
3644 | /* PC-relative branches need adjustment, but |
3645 | the PC-rel operand will always have a relocation. */ | |
3646 | newval = value; | |
3647 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
3648 | self_address) | |
3649 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
3650 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
3651 | o_slotbuf, newval)) | |
64b607e6 | 3652 | return 0; |
43cd72b9 | 3653 | } |
e0001a05 | 3654 | |
64b607e6 BW |
3655 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) |
3656 | return 0; | |
e0001a05 | 3657 | |
64b607e6 | 3658 | return o_insnbuf; |
43cd72b9 BW |
3659 | } |
3660 | } | |
64b607e6 | 3661 | return 0; |
43cd72b9 | 3662 | } |
e0001a05 | 3663 | |
e0001a05 | 3664 | |
64b607e6 BW |
3665 | /* Attempt to narrow an instruction. If the narrowing is valid, perform |
3666 | the action in-place directly into the contents and return TRUE. Otherwise, | |
3667 | the return value is FALSE and the contents are not modified. */ | |
e0001a05 | 3668 | |
43cd72b9 | 3669 | static bfd_boolean |
64b607e6 BW |
3670 | narrow_instruction (bfd_byte *contents, |
3671 | bfd_size_type content_length, | |
3672 | bfd_size_type offset) | |
e0001a05 | 3673 | { |
43cd72b9 | 3674 | xtensa_opcode opcode; |
64b607e6 | 3675 | bfd_size_type insn_len; |
43cd72b9 | 3676 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
3677 | xtensa_format fmt; |
3678 | xtensa_insnbuf o_insnbuf; | |
e0001a05 | 3679 | |
43cd72b9 BW |
3680 | static xtensa_insnbuf insnbuf = NULL; |
3681 | static xtensa_insnbuf slotbuf = NULL; | |
e0001a05 | 3682 | |
43cd72b9 BW |
3683 | if (insnbuf == NULL) |
3684 | { | |
3685 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3686 | slotbuf = xtensa_insnbuf_alloc (isa); | |
43cd72b9 | 3687 | } |
e0001a05 | 3688 | |
43cd72b9 | 3689 | BFD_ASSERT (offset < content_length); |
2c8c90bc | 3690 | |
43cd72b9 | 3691 | if (content_length < 2) |
e0001a05 NC |
3692 | return FALSE; |
3693 | ||
64b607e6 | 3694 | /* We will hand-code a few of these for a little while. |
43cd72b9 BW |
3695 | These have all been specified in the assembler aleady. */ |
3696 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3697 | content_length - offset); | |
3698 | fmt = xtensa_format_decode (isa, insnbuf); | |
3699 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
e0001a05 NC |
3700 | return FALSE; |
3701 | ||
43cd72b9 | 3702 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) |
e0001a05 NC |
3703 | return FALSE; |
3704 | ||
43cd72b9 BW |
3705 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); |
3706 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 3707 | return FALSE; |
43cd72b9 BW |
3708 | insn_len = xtensa_format_length (isa, fmt); |
3709 | if (insn_len > content_length) | |
3710 | return FALSE; | |
3711 | ||
64b607e6 BW |
3712 | o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode); |
3713 | if (o_insnbuf) | |
3714 | { | |
3715 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
3716 | content_length - offset); | |
3717 | return TRUE; | |
3718 | } | |
3719 | ||
3720 | return FALSE; | |
3721 | } | |
3722 | ||
3723 | ||
3724 | /* Check if an instruction can be "widened", i.e., changed from a 2-byte | |
3725 | "density" instruction to a standard 3-byte instruction. If it is valid, | |
3726 | return the instruction buffer holding the wide instruction. Otherwise, | |
3727 | return 0. The set of valid widenings are specified by a string table | |
3728 | but require some special case operand checks in some cases. */ | |
3729 | ||
3730 | static xtensa_insnbuf | |
3731 | can_widen_instruction (xtensa_insnbuf slotbuf, | |
3732 | xtensa_format fmt, | |
3733 | xtensa_opcode opcode) | |
3734 | { | |
3735 | xtensa_isa isa = xtensa_default_isa; | |
3736 | xtensa_format o_fmt; | |
3737 | unsigned opi; | |
3738 | ||
3739 | static xtensa_insnbuf o_insnbuf = NULL; | |
3740 | static xtensa_insnbuf o_slotbuf = NULL; | |
3741 | ||
3742 | if (o_insnbuf == NULL) | |
3743 | { | |
3744 | o_insnbuf = xtensa_insnbuf_alloc (isa); | |
3745 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
3746 | } | |
3747 | ||
3748 | for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++) | |
e0001a05 | 3749 | { |
43cd72b9 BW |
3750 | bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0); |
3751 | bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0 | |
3752 | || strcmp ("bnez", widenable[opi].wide) == 0); | |
e0001a05 | 3753 | |
43cd72b9 BW |
3754 | if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow)) |
3755 | { | |
3756 | uint32 value, newval; | |
3757 | int i, operand_count, o_operand_count, check_operand_count; | |
3758 | xtensa_opcode o_opcode; | |
e0001a05 | 3759 | |
43cd72b9 BW |
3760 | /* Address does not matter in this case. We might need to fix it |
3761 | to handle branches/jumps. */ | |
3762 | bfd_vma self_address = 0; | |
e0001a05 | 3763 | |
43cd72b9 BW |
3764 | o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide); |
3765 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 3766 | return 0; |
43cd72b9 BW |
3767 | o_fmt = get_single_format (o_opcode); |
3768 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 3769 | return 0; |
e0001a05 | 3770 | |
43cd72b9 BW |
3771 | if (xtensa_format_length (isa, fmt) != 2 |
3772 | || xtensa_format_length (isa, o_fmt) != 3) | |
64b607e6 | 3773 | return 0; |
e0001a05 | 3774 | |
43cd72b9 BW |
3775 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
3776 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
3777 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
3778 | check_operand_count = o_operand_count; | |
e0001a05 | 3779 | |
43cd72b9 | 3780 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 3781 | return 0; |
e0001a05 | 3782 | |
43cd72b9 BW |
3783 | if (!is_or) |
3784 | { | |
3785 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 3786 | return 0; |
43cd72b9 BW |
3787 | } |
3788 | else | |
3789 | { | |
3790 | uint32 rawval0, rawval1; | |
3791 | ||
64b607e6 BW |
3792 | if (o_operand_count != operand_count + 1 |
3793 | || xtensa_operand_get_field (isa, opcode, 0, | |
3794 | fmt, 0, slotbuf, &rawval0) != 0 | |
3795 | || xtensa_operand_get_field (isa, opcode, 1, | |
3796 | fmt, 0, slotbuf, &rawval1) != 0 | |
3797 | || rawval0 == rawval1 /* it is a nop */) | |
3798 | return 0; | |
43cd72b9 BW |
3799 | } |
3800 | if (is_branch) | |
3801 | check_operand_count--; | |
3802 | ||
64b607e6 | 3803 | for (i = 0; i < check_operand_count; i++) |
43cd72b9 BW |
3804 | { |
3805 | int new_i = i; | |
3806 | if (is_or && i == o_operand_count - 1) | |
3807 | new_i = i - 1; | |
3808 | if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0, | |
3809 | slotbuf, &value) | |
3810 | || xtensa_operand_decode (isa, opcode, new_i, &value)) | |
64b607e6 | 3811 | return 0; |
43cd72b9 BW |
3812 | |
3813 | /* PC-relative branches need adjustment, but | |
3814 | the PC-rel operand will always have a relocation. */ | |
3815 | newval = value; | |
3816 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
3817 | self_address) | |
3818 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
3819 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
3820 | o_slotbuf, newval)) | |
64b607e6 | 3821 | return 0; |
43cd72b9 BW |
3822 | } |
3823 | ||
3824 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) | |
64b607e6 | 3825 | return 0; |
43cd72b9 | 3826 | |
64b607e6 | 3827 | return o_insnbuf; |
43cd72b9 BW |
3828 | } |
3829 | } | |
64b607e6 BW |
3830 | return 0; |
3831 | } | |
3832 | ||
3833 | ||
3834 | /* Attempt to widen an instruction. If the widening is valid, perform | |
3835 | the action in-place directly into the contents and return TRUE. Otherwise, | |
3836 | the return value is FALSE and the contents are not modified. */ | |
3837 | ||
3838 | static bfd_boolean | |
3839 | widen_instruction (bfd_byte *contents, | |
3840 | bfd_size_type content_length, | |
3841 | bfd_size_type offset) | |
3842 | { | |
3843 | xtensa_opcode opcode; | |
3844 | bfd_size_type insn_len; | |
3845 | xtensa_isa isa = xtensa_default_isa; | |
3846 | xtensa_format fmt; | |
3847 | xtensa_insnbuf o_insnbuf; | |
3848 | ||
3849 | static xtensa_insnbuf insnbuf = NULL; | |
3850 | static xtensa_insnbuf slotbuf = NULL; | |
3851 | ||
3852 | if (insnbuf == NULL) | |
3853 | { | |
3854 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3855 | slotbuf = xtensa_insnbuf_alloc (isa); | |
3856 | } | |
3857 | ||
3858 | BFD_ASSERT (offset < content_length); | |
3859 | ||
3860 | if (content_length < 2) | |
3861 | return FALSE; | |
3862 | ||
3863 | /* We will hand-code a few of these for a little while. | |
3864 | These have all been specified in the assembler aleady. */ | |
3865 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3866 | content_length - offset); | |
3867 | fmt = xtensa_format_decode (isa, insnbuf); | |
3868 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
3869 | return FALSE; | |
3870 | ||
3871 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) | |
3872 | return FALSE; | |
3873 | ||
3874 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
3875 | if (opcode == XTENSA_UNDEFINED) | |
3876 | return FALSE; | |
3877 | insn_len = xtensa_format_length (isa, fmt); | |
3878 | if (insn_len > content_length) | |
3879 | return FALSE; | |
3880 | ||
3881 | o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode); | |
3882 | if (o_insnbuf) | |
3883 | { | |
3884 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
3885 | content_length - offset); | |
3886 | return TRUE; | |
3887 | } | |
43cd72b9 | 3888 | return FALSE; |
e0001a05 NC |
3889 | } |
3890 | ||
43cd72b9 BW |
3891 | \f |
3892 | /* Code for transforming CALLs at link-time. */ | |
e0001a05 | 3893 | |
43cd72b9 | 3894 | static bfd_reloc_status_type |
7fa3d080 BW |
3895 | elf_xtensa_do_asm_simplify (bfd_byte *contents, |
3896 | bfd_vma address, | |
3897 | bfd_vma content_length, | |
3898 | char **error_message) | |
e0001a05 | 3899 | { |
43cd72b9 BW |
3900 | static xtensa_insnbuf insnbuf = NULL; |
3901 | static xtensa_insnbuf slotbuf = NULL; | |
3902 | xtensa_format core_format = XTENSA_UNDEFINED; | |
3903 | xtensa_opcode opcode; | |
3904 | xtensa_opcode direct_call_opcode; | |
3905 | xtensa_isa isa = xtensa_default_isa; | |
3906 | bfd_byte *chbuf = contents + address; | |
3907 | int opn; | |
e0001a05 | 3908 | |
43cd72b9 | 3909 | if (insnbuf == NULL) |
e0001a05 | 3910 | { |
43cd72b9 BW |
3911 | insnbuf = xtensa_insnbuf_alloc (isa); |
3912 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 3913 | } |
e0001a05 | 3914 | |
43cd72b9 BW |
3915 | if (content_length < address) |
3916 | { | |
3917 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
3918 | return bfd_reloc_other; | |
3919 | } | |
e0001a05 | 3920 | |
43cd72b9 BW |
3921 | opcode = get_expanded_call_opcode (chbuf, content_length - address, 0); |
3922 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
3923 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
3924 | { | |
3925 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
3926 | return bfd_reloc_other; | |
3927 | } | |
3928 | ||
3929 | /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */ | |
3930 | core_format = xtensa_format_lookup (isa, "x24"); | |
3931 | opcode = xtensa_opcode_lookup (isa, "or"); | |
3932 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode); | |
3933 | for (opn = 0; opn < 3; opn++) | |
3934 | { | |
3935 | uint32 regno = 1; | |
3936 | xtensa_operand_encode (isa, opcode, opn, ®no); | |
3937 | xtensa_operand_set_field (isa, opcode, opn, core_format, 0, | |
3938 | slotbuf, regno); | |
3939 | } | |
3940 | xtensa_format_encode (isa, core_format, insnbuf); | |
3941 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
3942 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address); | |
e0001a05 | 3943 | |
43cd72b9 BW |
3944 | /* Assemble a CALL ("callN 0") into the 3 byte offset. */ |
3945 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode); | |
3946 | xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0); | |
e0001a05 | 3947 | |
43cd72b9 BW |
3948 | xtensa_format_encode (isa, core_format, insnbuf); |
3949 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
3950 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3, | |
3951 | content_length - address - 3); | |
e0001a05 | 3952 | |
43cd72b9 BW |
3953 | return bfd_reloc_ok; |
3954 | } | |
e0001a05 | 3955 | |
e0001a05 | 3956 | |
43cd72b9 | 3957 | static bfd_reloc_status_type |
7fa3d080 BW |
3958 | contract_asm_expansion (bfd_byte *contents, |
3959 | bfd_vma content_length, | |
3960 | Elf_Internal_Rela *irel, | |
3961 | char **error_message) | |
43cd72b9 BW |
3962 | { |
3963 | bfd_reloc_status_type retval = | |
3964 | elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length, | |
3965 | error_message); | |
e0001a05 | 3966 | |
43cd72b9 BW |
3967 | if (retval != bfd_reloc_ok) |
3968 | return bfd_reloc_dangerous; | |
e0001a05 | 3969 | |
43cd72b9 BW |
3970 | /* Update the irel->r_offset field so that the right immediate and |
3971 | the right instruction are modified during the relocation. */ | |
3972 | irel->r_offset += 3; | |
3973 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP); | |
3974 | return bfd_reloc_ok; | |
3975 | } | |
e0001a05 | 3976 | |
e0001a05 | 3977 | |
43cd72b9 | 3978 | static xtensa_opcode |
7fa3d080 | 3979 | swap_callx_for_call_opcode (xtensa_opcode opcode) |
e0001a05 | 3980 | { |
43cd72b9 | 3981 | init_call_opcodes (); |
e0001a05 | 3982 | |
43cd72b9 BW |
3983 | if (opcode == callx0_op) return call0_op; |
3984 | if (opcode == callx4_op) return call4_op; | |
3985 | if (opcode == callx8_op) return call8_op; | |
3986 | if (opcode == callx12_op) return call12_op; | |
e0001a05 | 3987 | |
43cd72b9 BW |
3988 | /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */ |
3989 | return XTENSA_UNDEFINED; | |
3990 | } | |
e0001a05 | 3991 | |
e0001a05 | 3992 | |
43cd72b9 BW |
3993 | /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN; |
3994 | CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode. | |
3995 | If not, return XTENSA_UNDEFINED. */ | |
e0001a05 | 3996 | |
43cd72b9 BW |
3997 | #define L32R_TARGET_REG_OPERAND 0 |
3998 | #define CONST16_TARGET_REG_OPERAND 0 | |
3999 | #define CALLN_SOURCE_OPERAND 0 | |
e0001a05 | 4000 | |
43cd72b9 | 4001 | static xtensa_opcode |
7fa3d080 | 4002 | get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r) |
e0001a05 | 4003 | { |
43cd72b9 BW |
4004 | static xtensa_insnbuf insnbuf = NULL; |
4005 | static xtensa_insnbuf slotbuf = NULL; | |
4006 | xtensa_format fmt; | |
4007 | xtensa_opcode opcode; | |
4008 | xtensa_isa isa = xtensa_default_isa; | |
4009 | uint32 regno, const16_regno, call_regno; | |
4010 | int offset = 0; | |
e0001a05 | 4011 | |
43cd72b9 | 4012 | if (insnbuf == NULL) |
e0001a05 | 4013 | { |
43cd72b9 BW |
4014 | insnbuf = xtensa_insnbuf_alloc (isa); |
4015 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4016 | } |
43cd72b9 BW |
4017 | |
4018 | xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize); | |
4019 | fmt = xtensa_format_decode (isa, insnbuf); | |
4020 | if (fmt == XTENSA_UNDEFINED | |
4021 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4022 | return XTENSA_UNDEFINED; | |
4023 | ||
4024 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4025 | if (opcode == XTENSA_UNDEFINED) | |
4026 | return XTENSA_UNDEFINED; | |
4027 | ||
4028 | if (opcode == get_l32r_opcode ()) | |
e0001a05 | 4029 | { |
43cd72b9 BW |
4030 | if (p_uses_l32r) |
4031 | *p_uses_l32r = TRUE; | |
4032 | if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4033 | fmt, 0, slotbuf, ®no) | |
4034 | || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4035 | ®no)) | |
4036 | return XTENSA_UNDEFINED; | |
e0001a05 | 4037 | } |
43cd72b9 | 4038 | else if (opcode == get_const16_opcode ()) |
e0001a05 | 4039 | { |
43cd72b9 BW |
4040 | if (p_uses_l32r) |
4041 | *p_uses_l32r = FALSE; | |
4042 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4043 | fmt, 0, slotbuf, ®no) | |
4044 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4045 | ®no)) | |
4046 | return XTENSA_UNDEFINED; | |
4047 | ||
4048 | /* Check that the next instruction is also CONST16. */ | |
4049 | offset += xtensa_format_length (isa, fmt); | |
4050 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4051 | fmt = xtensa_format_decode (isa, insnbuf); | |
4052 | if (fmt == XTENSA_UNDEFINED | |
4053 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4054 | return XTENSA_UNDEFINED; | |
4055 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4056 | if (opcode != get_const16_opcode ()) | |
4057 | return XTENSA_UNDEFINED; | |
4058 | ||
4059 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4060 | fmt, 0, slotbuf, &const16_regno) | |
4061 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4062 | &const16_regno) | |
4063 | || const16_regno != regno) | |
4064 | return XTENSA_UNDEFINED; | |
e0001a05 | 4065 | } |
43cd72b9 BW |
4066 | else |
4067 | return XTENSA_UNDEFINED; | |
e0001a05 | 4068 | |
43cd72b9 BW |
4069 | /* Next instruction should be an CALLXn with operand 0 == regno. */ |
4070 | offset += xtensa_format_length (isa, fmt); | |
4071 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4072 | fmt = xtensa_format_decode (isa, insnbuf); | |
4073 | if (fmt == XTENSA_UNDEFINED | |
4074 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4075 | return XTENSA_UNDEFINED; | |
4076 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4077 | if (opcode == XTENSA_UNDEFINED | |
4078 | || !is_indirect_call_opcode (opcode)) | |
4079 | return XTENSA_UNDEFINED; | |
e0001a05 | 4080 | |
43cd72b9 BW |
4081 | if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND, |
4082 | fmt, 0, slotbuf, &call_regno) | |
4083 | || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND, | |
4084 | &call_regno)) | |
4085 | return XTENSA_UNDEFINED; | |
e0001a05 | 4086 | |
43cd72b9 BW |
4087 | if (call_regno != regno) |
4088 | return XTENSA_UNDEFINED; | |
e0001a05 | 4089 | |
43cd72b9 BW |
4090 | return opcode; |
4091 | } | |
e0001a05 | 4092 | |
43cd72b9 BW |
4093 | \f |
4094 | /* Data structures used during relaxation. */ | |
e0001a05 | 4095 | |
43cd72b9 | 4096 | /* r_reloc: relocation values. */ |
e0001a05 | 4097 | |
43cd72b9 BW |
4098 | /* Through the relaxation process, we need to keep track of the values |
4099 | that will result from evaluating relocations. The standard ELF | |
4100 | relocation structure is not sufficient for this purpose because we're | |
4101 | operating on multiple input files at once, so we need to know which | |
4102 | input file a relocation refers to. The r_reloc structure thus | |
4103 | records both the input file (bfd) and ELF relocation. | |
e0001a05 | 4104 | |
43cd72b9 BW |
4105 | For efficiency, an r_reloc also contains a "target_offset" field to |
4106 | cache the target-section-relative offset value that is represented by | |
4107 | the relocation. | |
4108 | ||
4109 | The r_reloc also contains a virtual offset that allows multiple | |
4110 | inserted literals to be placed at the same "address" with | |
4111 | different offsets. */ | |
e0001a05 | 4112 | |
43cd72b9 | 4113 | typedef struct r_reloc_struct r_reloc; |
e0001a05 | 4114 | |
43cd72b9 | 4115 | struct r_reloc_struct |
e0001a05 | 4116 | { |
43cd72b9 BW |
4117 | bfd *abfd; |
4118 | Elf_Internal_Rela rela; | |
e0001a05 | 4119 | bfd_vma target_offset; |
43cd72b9 | 4120 | bfd_vma virtual_offset; |
e0001a05 NC |
4121 | }; |
4122 | ||
e0001a05 | 4123 | |
43cd72b9 BW |
4124 | /* The r_reloc structure is included by value in literal_value, but not |
4125 | every literal_value has an associated relocation -- some are simple | |
4126 | constants. In such cases, we set all the fields in the r_reloc | |
4127 | struct to zero. The r_reloc_is_const function should be used to | |
4128 | detect this case. */ | |
e0001a05 | 4129 | |
43cd72b9 | 4130 | static bfd_boolean |
7fa3d080 | 4131 | r_reloc_is_const (const r_reloc *r_rel) |
e0001a05 | 4132 | { |
43cd72b9 | 4133 | return (r_rel->abfd == NULL); |
e0001a05 NC |
4134 | } |
4135 | ||
4136 | ||
43cd72b9 | 4137 | static bfd_vma |
7fa3d080 | 4138 | r_reloc_get_target_offset (const r_reloc *r_rel) |
e0001a05 | 4139 | { |
43cd72b9 BW |
4140 | bfd_vma target_offset; |
4141 | unsigned long r_symndx; | |
e0001a05 | 4142 | |
43cd72b9 BW |
4143 | BFD_ASSERT (!r_reloc_is_const (r_rel)); |
4144 | r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4145 | target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx); | |
4146 | return (target_offset + r_rel->rela.r_addend); | |
4147 | } | |
e0001a05 | 4148 | |
e0001a05 | 4149 | |
43cd72b9 | 4150 | static struct elf_link_hash_entry * |
7fa3d080 | 4151 | r_reloc_get_hash_entry (const r_reloc *r_rel) |
e0001a05 | 4152 | { |
43cd72b9 BW |
4153 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); |
4154 | return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx); | |
4155 | } | |
e0001a05 | 4156 | |
43cd72b9 BW |
4157 | |
4158 | static asection * | |
7fa3d080 | 4159 | r_reloc_get_section (const r_reloc *r_rel) |
43cd72b9 BW |
4160 | { |
4161 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4162 | return get_elf_r_symndx_section (r_rel->abfd, r_symndx); | |
4163 | } | |
e0001a05 NC |
4164 | |
4165 | ||
4166 | static bfd_boolean | |
7fa3d080 | 4167 | r_reloc_is_defined (const r_reloc *r_rel) |
e0001a05 | 4168 | { |
43cd72b9 BW |
4169 | asection *sec; |
4170 | if (r_rel == NULL) | |
e0001a05 | 4171 | return FALSE; |
e0001a05 | 4172 | |
43cd72b9 BW |
4173 | sec = r_reloc_get_section (r_rel); |
4174 | if (sec == bfd_abs_section_ptr | |
4175 | || sec == bfd_com_section_ptr | |
4176 | || sec == bfd_und_section_ptr) | |
4177 | return FALSE; | |
4178 | return TRUE; | |
e0001a05 NC |
4179 | } |
4180 | ||
4181 | ||
7fa3d080 BW |
4182 | static void |
4183 | r_reloc_init (r_reloc *r_rel, | |
4184 | bfd *abfd, | |
4185 | Elf_Internal_Rela *irel, | |
4186 | bfd_byte *contents, | |
4187 | bfd_size_type content_length) | |
4188 | { | |
4189 | int r_type; | |
4190 | reloc_howto_type *howto; | |
4191 | ||
4192 | if (irel) | |
4193 | { | |
4194 | r_rel->rela = *irel; | |
4195 | r_rel->abfd = abfd; | |
4196 | r_rel->target_offset = r_reloc_get_target_offset (r_rel); | |
4197 | r_rel->virtual_offset = 0; | |
4198 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
4199 | howto = &elf_howto_table[r_type]; | |
4200 | if (howto->partial_inplace) | |
4201 | { | |
4202 | bfd_vma inplace_val; | |
4203 | BFD_ASSERT (r_rel->rela.r_offset < content_length); | |
4204 | ||
4205 | inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]); | |
4206 | r_rel->target_offset += inplace_val; | |
4207 | } | |
4208 | } | |
4209 | else | |
4210 | memset (r_rel, 0, sizeof (r_reloc)); | |
4211 | } | |
4212 | ||
4213 | ||
43cd72b9 BW |
4214 | #if DEBUG |
4215 | ||
e0001a05 | 4216 | static void |
7fa3d080 | 4217 | print_r_reloc (FILE *fp, const r_reloc *r_rel) |
e0001a05 | 4218 | { |
43cd72b9 BW |
4219 | if (r_reloc_is_defined (r_rel)) |
4220 | { | |
4221 | asection *sec = r_reloc_get_section (r_rel); | |
4222 | fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name); | |
4223 | } | |
4224 | else if (r_reloc_get_hash_entry (r_rel)) | |
4225 | fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string); | |
4226 | else | |
4227 | fprintf (fp, " ?? + "); | |
e0001a05 | 4228 | |
43cd72b9 BW |
4229 | fprintf_vma (fp, r_rel->target_offset); |
4230 | if (r_rel->virtual_offset) | |
4231 | { | |
4232 | fprintf (fp, " + "); | |
4233 | fprintf_vma (fp, r_rel->virtual_offset); | |
4234 | } | |
4235 | ||
4236 | fprintf (fp, ")"); | |
4237 | } | |
e0001a05 | 4238 | |
43cd72b9 | 4239 | #endif /* DEBUG */ |
e0001a05 | 4240 | |
43cd72b9 BW |
4241 | \f |
4242 | /* source_reloc: relocations that reference literals. */ | |
e0001a05 | 4243 | |
43cd72b9 BW |
4244 | /* To determine whether literals can be coalesced, we need to first |
4245 | record all the relocations that reference the literals. The | |
4246 | source_reloc structure below is used for this purpose. The | |
4247 | source_reloc entries are kept in a per-literal-section array, sorted | |
4248 | by offset within the literal section (i.e., target offset). | |
e0001a05 | 4249 | |
43cd72b9 BW |
4250 | The source_sec and r_rel.rela.r_offset fields identify the source of |
4251 | the relocation. The r_rel field records the relocation value, i.e., | |
4252 | the offset of the literal being referenced. The opnd field is needed | |
4253 | to determine the range of the immediate field to which the relocation | |
4254 | applies, so we can determine whether another literal with the same | |
4255 | value is within range. The is_null field is true when the relocation | |
4256 | is being removed (e.g., when an L32R is being removed due to a CALLX | |
4257 | that is converted to a direct CALL). */ | |
e0001a05 | 4258 | |
43cd72b9 BW |
4259 | typedef struct source_reloc_struct source_reloc; |
4260 | ||
4261 | struct source_reloc_struct | |
e0001a05 | 4262 | { |
43cd72b9 BW |
4263 | asection *source_sec; |
4264 | r_reloc r_rel; | |
4265 | xtensa_opcode opcode; | |
4266 | int opnd; | |
4267 | bfd_boolean is_null; | |
4268 | bfd_boolean is_abs_literal; | |
4269 | }; | |
e0001a05 | 4270 | |
e0001a05 | 4271 | |
e0001a05 | 4272 | static void |
7fa3d080 BW |
4273 | init_source_reloc (source_reloc *reloc, |
4274 | asection *source_sec, | |
4275 | const r_reloc *r_rel, | |
4276 | xtensa_opcode opcode, | |
4277 | int opnd, | |
4278 | bfd_boolean is_abs_literal) | |
e0001a05 | 4279 | { |
43cd72b9 BW |
4280 | reloc->source_sec = source_sec; |
4281 | reloc->r_rel = *r_rel; | |
4282 | reloc->opcode = opcode; | |
4283 | reloc->opnd = opnd; | |
4284 | reloc->is_null = FALSE; | |
4285 | reloc->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
4286 | } |
4287 | ||
e0001a05 | 4288 | |
43cd72b9 BW |
4289 | /* Find the source_reloc for a particular source offset and relocation |
4290 | type. Note that the array is sorted by _target_ offset, so this is | |
4291 | just a linear search. */ | |
e0001a05 | 4292 | |
43cd72b9 | 4293 | static source_reloc * |
7fa3d080 BW |
4294 | find_source_reloc (source_reloc *src_relocs, |
4295 | int src_count, | |
4296 | asection *sec, | |
4297 | Elf_Internal_Rela *irel) | |
e0001a05 | 4298 | { |
43cd72b9 | 4299 | int i; |
e0001a05 | 4300 | |
43cd72b9 BW |
4301 | for (i = 0; i < src_count; i++) |
4302 | { | |
4303 | if (src_relocs[i].source_sec == sec | |
4304 | && src_relocs[i].r_rel.rela.r_offset == irel->r_offset | |
4305 | && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info) | |
4306 | == ELF32_R_TYPE (irel->r_info))) | |
4307 | return &src_relocs[i]; | |
4308 | } | |
e0001a05 | 4309 | |
43cd72b9 | 4310 | return NULL; |
e0001a05 NC |
4311 | } |
4312 | ||
4313 | ||
43cd72b9 | 4314 | static int |
7fa3d080 | 4315 | source_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 4316 | { |
43cd72b9 BW |
4317 | const source_reloc *a = (const source_reloc *) ap; |
4318 | const source_reloc *b = (const source_reloc *) bp; | |
e0001a05 | 4319 | |
43cd72b9 BW |
4320 | if (a->r_rel.target_offset != b->r_rel.target_offset) |
4321 | return (a->r_rel.target_offset - b->r_rel.target_offset); | |
e0001a05 | 4322 | |
43cd72b9 BW |
4323 | /* We don't need to sort on these criteria for correctness, |
4324 | but enforcing a more strict ordering prevents unstable qsort | |
4325 | from behaving differently with different implementations. | |
4326 | Without the code below we get correct but different results | |
4327 | on Solaris 2.7 and 2.8. We would like to always produce the | |
4328 | same results no matter the host. */ | |
4329 | ||
4330 | if ((!a->is_null) - (!b->is_null)) | |
4331 | return ((!a->is_null) - (!b->is_null)); | |
4332 | return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela); | |
e0001a05 NC |
4333 | } |
4334 | ||
43cd72b9 BW |
4335 | \f |
4336 | /* Literal values and value hash tables. */ | |
e0001a05 | 4337 | |
43cd72b9 BW |
4338 | /* Literals with the same value can be coalesced. The literal_value |
4339 | structure records the value of a literal: the "r_rel" field holds the | |
4340 | information from the relocation on the literal (if there is one) and | |
4341 | the "value" field holds the contents of the literal word itself. | |
e0001a05 | 4342 | |
43cd72b9 BW |
4343 | The value_map structure records a literal value along with the |
4344 | location of a literal holding that value. The value_map hash table | |
4345 | is indexed by the literal value, so that we can quickly check if a | |
4346 | particular literal value has been seen before and is thus a candidate | |
4347 | for coalescing. */ | |
e0001a05 | 4348 | |
43cd72b9 BW |
4349 | typedef struct literal_value_struct literal_value; |
4350 | typedef struct value_map_struct value_map; | |
4351 | typedef struct value_map_hash_table_struct value_map_hash_table; | |
e0001a05 | 4352 | |
43cd72b9 | 4353 | struct literal_value_struct |
e0001a05 | 4354 | { |
43cd72b9 BW |
4355 | r_reloc r_rel; |
4356 | unsigned long value; | |
4357 | bfd_boolean is_abs_literal; | |
4358 | }; | |
4359 | ||
4360 | struct value_map_struct | |
4361 | { | |
4362 | literal_value val; /* The literal value. */ | |
4363 | r_reloc loc; /* Location of the literal. */ | |
4364 | value_map *next; | |
4365 | }; | |
4366 | ||
4367 | struct value_map_hash_table_struct | |
4368 | { | |
4369 | unsigned bucket_count; | |
4370 | value_map **buckets; | |
4371 | unsigned count; | |
4372 | bfd_boolean has_last_loc; | |
4373 | r_reloc last_loc; | |
4374 | }; | |
4375 | ||
4376 | ||
e0001a05 | 4377 | static void |
7fa3d080 BW |
4378 | init_literal_value (literal_value *lit, |
4379 | const r_reloc *r_rel, | |
4380 | unsigned long value, | |
4381 | bfd_boolean is_abs_literal) | |
e0001a05 | 4382 | { |
43cd72b9 BW |
4383 | lit->r_rel = *r_rel; |
4384 | lit->value = value; | |
4385 | lit->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
4386 | } |
4387 | ||
4388 | ||
43cd72b9 | 4389 | static bfd_boolean |
7fa3d080 BW |
4390 | literal_value_equal (const literal_value *src1, |
4391 | const literal_value *src2, | |
4392 | bfd_boolean final_static_link) | |
e0001a05 | 4393 | { |
43cd72b9 | 4394 | struct elf_link_hash_entry *h1, *h2; |
e0001a05 | 4395 | |
43cd72b9 BW |
4396 | if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel)) |
4397 | return FALSE; | |
e0001a05 | 4398 | |
43cd72b9 BW |
4399 | if (r_reloc_is_const (&src1->r_rel)) |
4400 | return (src1->value == src2->value); | |
e0001a05 | 4401 | |
43cd72b9 BW |
4402 | if (ELF32_R_TYPE (src1->r_rel.rela.r_info) |
4403 | != ELF32_R_TYPE (src2->r_rel.rela.r_info)) | |
4404 | return FALSE; | |
e0001a05 | 4405 | |
43cd72b9 BW |
4406 | if (src1->r_rel.target_offset != src2->r_rel.target_offset) |
4407 | return FALSE; | |
4408 | ||
4409 | if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset) | |
4410 | return FALSE; | |
4411 | ||
4412 | if (src1->value != src2->value) | |
4413 | return FALSE; | |
4414 | ||
4415 | /* Now check for the same section (if defined) or the same elf_hash | |
4416 | (if undefined or weak). */ | |
4417 | h1 = r_reloc_get_hash_entry (&src1->r_rel); | |
4418 | h2 = r_reloc_get_hash_entry (&src2->r_rel); | |
4419 | if (r_reloc_is_defined (&src1->r_rel) | |
4420 | && (final_static_link | |
4421 | || ((!h1 || h1->root.type != bfd_link_hash_defweak) | |
4422 | && (!h2 || h2->root.type != bfd_link_hash_defweak)))) | |
4423 | { | |
4424 | if (r_reloc_get_section (&src1->r_rel) | |
4425 | != r_reloc_get_section (&src2->r_rel)) | |
4426 | return FALSE; | |
4427 | } | |
4428 | else | |
4429 | { | |
4430 | /* Require that the hash entries (i.e., symbols) be identical. */ | |
4431 | if (h1 != h2 || h1 == 0) | |
4432 | return FALSE; | |
4433 | } | |
4434 | ||
4435 | if (src1->is_abs_literal != src2->is_abs_literal) | |
4436 | return FALSE; | |
4437 | ||
4438 | return TRUE; | |
e0001a05 NC |
4439 | } |
4440 | ||
e0001a05 | 4441 | |
43cd72b9 BW |
4442 | /* Must be power of 2. */ |
4443 | #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024 | |
e0001a05 | 4444 | |
43cd72b9 | 4445 | static value_map_hash_table * |
7fa3d080 | 4446 | value_map_hash_table_init (void) |
43cd72b9 BW |
4447 | { |
4448 | value_map_hash_table *values; | |
e0001a05 | 4449 | |
43cd72b9 BW |
4450 | values = (value_map_hash_table *) |
4451 | bfd_zmalloc (sizeof (value_map_hash_table)); | |
4452 | values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT; | |
4453 | values->count = 0; | |
4454 | values->buckets = (value_map **) | |
4455 | bfd_zmalloc (sizeof (value_map *) * values->bucket_count); | |
4456 | if (values->buckets == NULL) | |
4457 | { | |
4458 | free (values); | |
4459 | return NULL; | |
4460 | } | |
4461 | values->has_last_loc = FALSE; | |
4462 | ||
4463 | return values; | |
4464 | } | |
4465 | ||
4466 | ||
4467 | static void | |
7fa3d080 | 4468 | value_map_hash_table_delete (value_map_hash_table *table) |
e0001a05 | 4469 | { |
43cd72b9 BW |
4470 | free (table->buckets); |
4471 | free (table); | |
4472 | } | |
4473 | ||
4474 | ||
4475 | static unsigned | |
7fa3d080 | 4476 | hash_bfd_vma (bfd_vma val) |
43cd72b9 BW |
4477 | { |
4478 | return (val >> 2) + (val >> 10); | |
4479 | } | |
4480 | ||
4481 | ||
4482 | static unsigned | |
7fa3d080 | 4483 | literal_value_hash (const literal_value *src) |
43cd72b9 BW |
4484 | { |
4485 | unsigned hash_val; | |
e0001a05 | 4486 | |
43cd72b9 BW |
4487 | hash_val = hash_bfd_vma (src->value); |
4488 | if (!r_reloc_is_const (&src->r_rel)) | |
e0001a05 | 4489 | { |
43cd72b9 BW |
4490 | void *sec_or_hash; |
4491 | ||
4492 | hash_val += hash_bfd_vma (src->is_abs_literal * 1000); | |
4493 | hash_val += hash_bfd_vma (src->r_rel.target_offset); | |
4494 | hash_val += hash_bfd_vma (src->r_rel.virtual_offset); | |
4495 | ||
4496 | /* Now check for the same section and the same elf_hash. */ | |
4497 | if (r_reloc_is_defined (&src->r_rel)) | |
4498 | sec_or_hash = r_reloc_get_section (&src->r_rel); | |
4499 | else | |
4500 | sec_or_hash = r_reloc_get_hash_entry (&src->r_rel); | |
f60ca5e3 | 4501 | hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash); |
e0001a05 | 4502 | } |
43cd72b9 BW |
4503 | return hash_val; |
4504 | } | |
e0001a05 | 4505 | |
e0001a05 | 4506 | |
43cd72b9 | 4507 | /* Check if the specified literal_value has been seen before. */ |
e0001a05 | 4508 | |
43cd72b9 | 4509 | static value_map * |
7fa3d080 BW |
4510 | value_map_get_cached_value (value_map_hash_table *map, |
4511 | const literal_value *val, | |
4512 | bfd_boolean final_static_link) | |
43cd72b9 BW |
4513 | { |
4514 | value_map *map_e; | |
4515 | value_map *bucket; | |
4516 | unsigned idx; | |
4517 | ||
4518 | idx = literal_value_hash (val); | |
4519 | idx = idx & (map->bucket_count - 1); | |
4520 | bucket = map->buckets[idx]; | |
4521 | for (map_e = bucket; map_e; map_e = map_e->next) | |
e0001a05 | 4522 | { |
43cd72b9 BW |
4523 | if (literal_value_equal (&map_e->val, val, final_static_link)) |
4524 | return map_e; | |
4525 | } | |
4526 | return NULL; | |
4527 | } | |
e0001a05 | 4528 | |
e0001a05 | 4529 | |
43cd72b9 BW |
4530 | /* Record a new literal value. It is illegal to call this if VALUE |
4531 | already has an entry here. */ | |
4532 | ||
4533 | static value_map * | |
7fa3d080 BW |
4534 | add_value_map (value_map_hash_table *map, |
4535 | const literal_value *val, | |
4536 | const r_reloc *loc, | |
4537 | bfd_boolean final_static_link) | |
43cd72b9 BW |
4538 | { |
4539 | value_map **bucket_p; | |
4540 | unsigned idx; | |
4541 | ||
4542 | value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map)); | |
4543 | if (val_e == NULL) | |
4544 | { | |
4545 | bfd_set_error (bfd_error_no_memory); | |
4546 | return NULL; | |
e0001a05 NC |
4547 | } |
4548 | ||
43cd72b9 BW |
4549 | BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link)); |
4550 | val_e->val = *val; | |
4551 | val_e->loc = *loc; | |
4552 | ||
4553 | idx = literal_value_hash (val); | |
4554 | idx = idx & (map->bucket_count - 1); | |
4555 | bucket_p = &map->buckets[idx]; | |
4556 | ||
4557 | val_e->next = *bucket_p; | |
4558 | *bucket_p = val_e; | |
4559 | map->count++; | |
4560 | /* FIXME: Consider resizing the hash table if we get too many entries. */ | |
4561 | ||
4562 | return val_e; | |
e0001a05 NC |
4563 | } |
4564 | ||
43cd72b9 BW |
4565 | \f |
4566 | /* Lists of text actions (ta_) for narrowing, widening, longcall | |
4567 | conversion, space fill, code & literal removal, etc. */ | |
4568 | ||
4569 | /* The following text actions are generated: | |
4570 | ||
4571 | "ta_remove_insn" remove an instruction or instructions | |
4572 | "ta_remove_longcall" convert longcall to call | |
4573 | "ta_convert_longcall" convert longcall to nop/call | |
4574 | "ta_narrow_insn" narrow a wide instruction | |
4575 | "ta_widen" widen a narrow instruction | |
4576 | "ta_fill" add fill or remove fill | |
4577 | removed < 0 is a fill; branches to the fill address will be | |
4578 | changed to address + fill size (e.g., address - removed) | |
4579 | removed >= 0 branches to the fill address will stay unchanged | |
4580 | "ta_remove_literal" remove a literal; this action is | |
4581 | indicated when a literal is removed | |
4582 | or replaced. | |
4583 | "ta_add_literal" insert a new literal; this action is | |
4584 | indicated when a literal has been moved. | |
4585 | It may use a virtual_offset because | |
4586 | multiple literals can be placed at the | |
4587 | same location. | |
4588 | ||
4589 | For each of these text actions, we also record the number of bytes | |
4590 | removed by performing the text action. In the case of a "ta_widen" | |
4591 | or a "ta_fill" that adds space, the removed_bytes will be negative. */ | |
4592 | ||
4593 | typedef struct text_action_struct text_action; | |
4594 | typedef struct text_action_list_struct text_action_list; | |
4595 | typedef enum text_action_enum_t text_action_t; | |
4596 | ||
4597 | enum text_action_enum_t | |
4598 | { | |
4599 | ta_none, | |
4600 | ta_remove_insn, /* removed = -size */ | |
4601 | ta_remove_longcall, /* removed = -size */ | |
4602 | ta_convert_longcall, /* removed = 0 */ | |
4603 | ta_narrow_insn, /* removed = -1 */ | |
4604 | ta_widen_insn, /* removed = +1 */ | |
4605 | ta_fill, /* removed = +size */ | |
4606 | ta_remove_literal, | |
4607 | ta_add_literal | |
4608 | }; | |
e0001a05 | 4609 | |
e0001a05 | 4610 | |
43cd72b9 BW |
4611 | /* Structure for a text action record. */ |
4612 | struct text_action_struct | |
e0001a05 | 4613 | { |
43cd72b9 BW |
4614 | text_action_t action; |
4615 | asection *sec; /* Optional */ | |
4616 | bfd_vma offset; | |
4617 | bfd_vma virtual_offset; /* Zero except for adding literals. */ | |
4618 | int removed_bytes; | |
4619 | literal_value value; /* Only valid when adding literals. */ | |
e0001a05 | 4620 | |
43cd72b9 BW |
4621 | text_action *next; |
4622 | }; | |
e0001a05 | 4623 | |
e0001a05 | 4624 | |
43cd72b9 BW |
4625 | /* List of all of the actions taken on a text section. */ |
4626 | struct text_action_list_struct | |
4627 | { | |
4628 | text_action *head; | |
4629 | }; | |
e0001a05 | 4630 | |
e0001a05 | 4631 | |
7fa3d080 BW |
4632 | static text_action * |
4633 | find_fill_action (text_action_list *l, asection *sec, bfd_vma offset) | |
43cd72b9 BW |
4634 | { |
4635 | text_action **m_p; | |
4636 | ||
4637 | /* It is not necessary to fill at the end of a section. */ | |
4638 | if (sec->size == offset) | |
4639 | return NULL; | |
4640 | ||
7fa3d080 | 4641 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
4642 | { |
4643 | text_action *t = *m_p; | |
4644 | /* When the action is another fill at the same address, | |
4645 | just increase the size. */ | |
4646 | if (t->offset == offset && t->action == ta_fill) | |
4647 | return t; | |
4648 | } | |
4649 | return NULL; | |
4650 | } | |
4651 | ||
4652 | ||
4653 | static int | |
7fa3d080 BW |
4654 | compute_removed_action_diff (const text_action *ta, |
4655 | asection *sec, | |
4656 | bfd_vma offset, | |
4657 | int removed, | |
4658 | int removable_space) | |
43cd72b9 BW |
4659 | { |
4660 | int new_removed; | |
4661 | int current_removed = 0; | |
4662 | ||
7fa3d080 | 4663 | if (ta) |
43cd72b9 BW |
4664 | current_removed = ta->removed_bytes; |
4665 | ||
4666 | BFD_ASSERT (ta == NULL || ta->offset == offset); | |
4667 | BFD_ASSERT (ta == NULL || ta->action == ta_fill); | |
4668 | ||
4669 | /* It is not necessary to fill at the end of a section. Clean this up. */ | |
4670 | if (sec->size == offset) | |
4671 | new_removed = removable_space - 0; | |
4672 | else | |
4673 | { | |
4674 | int space; | |
4675 | int added = -removed - current_removed; | |
4676 | /* Ignore multiples of the section alignment. */ | |
4677 | added = ((1 << sec->alignment_power) - 1) & added; | |
4678 | new_removed = (-added); | |
4679 | ||
4680 | /* Modify for removable. */ | |
4681 | space = removable_space - new_removed; | |
4682 | new_removed = (removable_space | |
4683 | - (((1 << sec->alignment_power) - 1) & space)); | |
4684 | } | |
4685 | return (new_removed - current_removed); | |
4686 | } | |
4687 | ||
4688 | ||
7fa3d080 BW |
4689 | static void |
4690 | adjust_fill_action (text_action *ta, int fill_diff) | |
43cd72b9 BW |
4691 | { |
4692 | ta->removed_bytes += fill_diff; | |
4693 | } | |
4694 | ||
4695 | ||
4696 | /* Add a modification action to the text. For the case of adding or | |
4697 | removing space, modify any current fill and assume that | |
4698 | "unreachable_space" bytes can be freely contracted. Note that a | |
4699 | negative removed value is a fill. */ | |
4700 | ||
4701 | static void | |
7fa3d080 BW |
4702 | text_action_add (text_action_list *l, |
4703 | text_action_t action, | |
4704 | asection *sec, | |
4705 | bfd_vma offset, | |
4706 | int removed) | |
43cd72b9 BW |
4707 | { |
4708 | text_action **m_p; | |
4709 | text_action *ta; | |
4710 | ||
4711 | /* It is not necessary to fill at the end of a section. */ | |
4712 | if (action == ta_fill && sec->size == offset) | |
4713 | return; | |
4714 | ||
4715 | /* It is not necessary to fill 0 bytes. */ | |
4716 | if (action == ta_fill && removed == 0) | |
4717 | return; | |
4718 | ||
7fa3d080 | 4719 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
4720 | { |
4721 | text_action *t = *m_p; | |
4722 | /* When the action is another fill at the same address, | |
4723 | just increase the size. */ | |
4724 | if (t->offset == offset && t->action == ta_fill && action == ta_fill) | |
4725 | { | |
4726 | t->removed_bytes += removed; | |
4727 | return; | |
4728 | } | |
4729 | } | |
4730 | ||
4731 | /* Create a new record and fill it up. */ | |
4732 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
4733 | ta->action = action; | |
4734 | ta->sec = sec; | |
4735 | ta->offset = offset; | |
4736 | ta->removed_bytes = removed; | |
4737 | ta->next = (*m_p); | |
4738 | *m_p = ta; | |
4739 | } | |
4740 | ||
4741 | ||
4742 | static void | |
7fa3d080 BW |
4743 | text_action_add_literal (text_action_list *l, |
4744 | text_action_t action, | |
4745 | const r_reloc *loc, | |
4746 | const literal_value *value, | |
4747 | int removed) | |
43cd72b9 BW |
4748 | { |
4749 | text_action **m_p; | |
4750 | text_action *ta; | |
4751 | asection *sec = r_reloc_get_section (loc); | |
4752 | bfd_vma offset = loc->target_offset; | |
4753 | bfd_vma virtual_offset = loc->virtual_offset; | |
4754 | ||
4755 | BFD_ASSERT (action == ta_add_literal); | |
4756 | ||
4757 | for (m_p = &l->head; *m_p != NULL; m_p = &(*m_p)->next) | |
4758 | { | |
4759 | if ((*m_p)->offset > offset | |
4760 | && ((*m_p)->offset != offset | |
4761 | || (*m_p)->virtual_offset > virtual_offset)) | |
4762 | break; | |
4763 | } | |
4764 | ||
4765 | /* Create a new record and fill it up. */ | |
4766 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
4767 | ta->action = action; | |
4768 | ta->sec = sec; | |
4769 | ta->offset = offset; | |
4770 | ta->virtual_offset = virtual_offset; | |
4771 | ta->value = *value; | |
4772 | ta->removed_bytes = removed; | |
4773 | ta->next = (*m_p); | |
4774 | *m_p = ta; | |
4775 | } | |
4776 | ||
4777 | ||
03669f1c BW |
4778 | /* Find the total offset adjustment for the relaxations specified by |
4779 | text_actions, beginning from a particular starting action. This is | |
4780 | typically used from offset_with_removed_text to search an entire list of | |
4781 | actions, but it may also be called directly when adjusting adjacent offsets | |
4782 | so that each search may begin where the previous one left off. */ | |
4783 | ||
4784 | static int | |
4785 | removed_by_actions (text_action **p_start_action, | |
4786 | bfd_vma offset, | |
4787 | bfd_boolean before_fill) | |
43cd72b9 BW |
4788 | { |
4789 | text_action *r; | |
4790 | int removed = 0; | |
4791 | ||
03669f1c BW |
4792 | r = *p_start_action; |
4793 | while (r) | |
43cd72b9 | 4794 | { |
03669f1c BW |
4795 | if (r->offset > offset) |
4796 | break; | |
4797 | ||
4798 | if (r->offset == offset | |
4799 | && (before_fill || r->action != ta_fill || r->removed_bytes >= 0)) | |
4800 | break; | |
4801 | ||
4802 | removed += r->removed_bytes; | |
4803 | ||
4804 | r = r->next; | |
43cd72b9 BW |
4805 | } |
4806 | ||
03669f1c BW |
4807 | *p_start_action = r; |
4808 | return removed; | |
4809 | } | |
4810 | ||
4811 | ||
4812 | static bfd_vma | |
4813 | offset_with_removed_text (text_action_list *action_list, bfd_vma offset) | |
4814 | { | |
4815 | text_action *r = action_list->head; | |
4816 | return offset - removed_by_actions (&r, offset, FALSE); | |
43cd72b9 BW |
4817 | } |
4818 | ||
4819 | ||
03e94c08 BW |
4820 | static unsigned |
4821 | action_list_count (text_action_list *action_list) | |
4822 | { | |
4823 | text_action *r = action_list->head; | |
4824 | unsigned count = 0; | |
4825 | for (r = action_list->head; r != NULL; r = r->next) | |
4826 | { | |
4827 | count++; | |
4828 | } | |
4829 | return count; | |
4830 | } | |
4831 | ||
4832 | ||
43cd72b9 BW |
4833 | /* The find_insn_action routine will only find non-fill actions. */ |
4834 | ||
7fa3d080 BW |
4835 | static text_action * |
4836 | find_insn_action (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 BW |
4837 | { |
4838 | text_action *t; | |
4839 | for (t = action_list->head; t; t = t->next) | |
4840 | { | |
4841 | if (t->offset == offset) | |
4842 | { | |
4843 | switch (t->action) | |
4844 | { | |
4845 | case ta_none: | |
4846 | case ta_fill: | |
4847 | break; | |
4848 | case ta_remove_insn: | |
4849 | case ta_remove_longcall: | |
4850 | case ta_convert_longcall: | |
4851 | case ta_narrow_insn: | |
4852 | case ta_widen_insn: | |
4853 | return t; | |
4854 | case ta_remove_literal: | |
4855 | case ta_add_literal: | |
4856 | BFD_ASSERT (0); | |
4857 | break; | |
4858 | } | |
4859 | } | |
4860 | } | |
4861 | return NULL; | |
4862 | } | |
4863 | ||
4864 | ||
4865 | #if DEBUG | |
4866 | ||
4867 | static void | |
7fa3d080 | 4868 | print_action_list (FILE *fp, text_action_list *action_list) |
43cd72b9 BW |
4869 | { |
4870 | text_action *r; | |
4871 | ||
4872 | fprintf (fp, "Text Action\n"); | |
4873 | for (r = action_list->head; r != NULL; r = r->next) | |
4874 | { | |
4875 | const char *t = "unknown"; | |
4876 | switch (r->action) | |
4877 | { | |
4878 | case ta_remove_insn: | |
4879 | t = "remove_insn"; break; | |
4880 | case ta_remove_longcall: | |
4881 | t = "remove_longcall"; break; | |
4882 | case ta_convert_longcall: | |
4883 | t = "remove_longcall"; break; | |
4884 | case ta_narrow_insn: | |
4885 | t = "narrow_insn"; break; | |
4886 | case ta_widen_insn: | |
4887 | t = "widen_insn"; break; | |
4888 | case ta_fill: | |
4889 | t = "fill"; break; | |
4890 | case ta_none: | |
4891 | t = "none"; break; | |
4892 | case ta_remove_literal: | |
4893 | t = "remove_literal"; break; | |
4894 | case ta_add_literal: | |
4895 | t = "add_literal"; break; | |
4896 | } | |
4897 | ||
4898 | fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n", | |
4899 | r->sec->owner->filename, | |
4900 | r->sec->name, r->offset, t, r->removed_bytes); | |
4901 | } | |
4902 | } | |
4903 | ||
4904 | #endif /* DEBUG */ | |
4905 | ||
4906 | \f | |
4907 | /* Lists of literals being coalesced or removed. */ | |
4908 | ||
4909 | /* In the usual case, the literal identified by "from" is being | |
4910 | coalesced with another literal identified by "to". If the literal is | |
4911 | unused and is being removed altogether, "to.abfd" will be NULL. | |
4912 | The removed_literal entries are kept on a per-section list, sorted | |
4913 | by the "from" offset field. */ | |
4914 | ||
4915 | typedef struct removed_literal_struct removed_literal; | |
4916 | typedef struct removed_literal_list_struct removed_literal_list; | |
4917 | ||
4918 | struct removed_literal_struct | |
4919 | { | |
4920 | r_reloc from; | |
4921 | r_reloc to; | |
4922 | removed_literal *next; | |
4923 | }; | |
4924 | ||
4925 | struct removed_literal_list_struct | |
4926 | { | |
4927 | removed_literal *head; | |
4928 | removed_literal *tail; | |
4929 | }; | |
4930 | ||
4931 | ||
43cd72b9 BW |
4932 | /* Record that the literal at "from" is being removed. If "to" is not |
4933 | NULL, the "from" literal is being coalesced with the "to" literal. */ | |
4934 | ||
4935 | static void | |
7fa3d080 BW |
4936 | add_removed_literal (removed_literal_list *removed_list, |
4937 | const r_reloc *from, | |
4938 | const r_reloc *to) | |
43cd72b9 BW |
4939 | { |
4940 | removed_literal *r, *new_r, *next_r; | |
4941 | ||
4942 | new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal)); | |
4943 | ||
4944 | new_r->from = *from; | |
4945 | if (to) | |
4946 | new_r->to = *to; | |
4947 | else | |
4948 | new_r->to.abfd = NULL; | |
4949 | new_r->next = NULL; | |
4950 | ||
4951 | r = removed_list->head; | |
4952 | if (r == NULL) | |
4953 | { | |
4954 | removed_list->head = new_r; | |
4955 | removed_list->tail = new_r; | |
4956 | } | |
4957 | /* Special check for common case of append. */ | |
4958 | else if (removed_list->tail->from.target_offset < from->target_offset) | |
4959 | { | |
4960 | removed_list->tail->next = new_r; | |
4961 | removed_list->tail = new_r; | |
4962 | } | |
4963 | else | |
4964 | { | |
7fa3d080 | 4965 | while (r->from.target_offset < from->target_offset && r->next) |
43cd72b9 BW |
4966 | { |
4967 | r = r->next; | |
4968 | } | |
4969 | next_r = r->next; | |
4970 | r->next = new_r; | |
4971 | new_r->next = next_r; | |
4972 | if (next_r == NULL) | |
4973 | removed_list->tail = new_r; | |
4974 | } | |
4975 | } | |
4976 | ||
4977 | ||
4978 | /* Check if the list of removed literals contains an entry for the | |
4979 | given address. Return the entry if found. */ | |
4980 | ||
4981 | static removed_literal * | |
7fa3d080 | 4982 | find_removed_literal (removed_literal_list *removed_list, bfd_vma addr) |
43cd72b9 BW |
4983 | { |
4984 | removed_literal *r = removed_list->head; | |
4985 | while (r && r->from.target_offset < addr) | |
4986 | r = r->next; | |
4987 | if (r && r->from.target_offset == addr) | |
4988 | return r; | |
4989 | return NULL; | |
4990 | } | |
4991 | ||
4992 | ||
4993 | #if DEBUG | |
4994 | ||
4995 | static void | |
7fa3d080 | 4996 | print_removed_literals (FILE *fp, removed_literal_list *removed_list) |
43cd72b9 BW |
4997 | { |
4998 | removed_literal *r; | |
4999 | r = removed_list->head; | |
5000 | if (r) | |
5001 | fprintf (fp, "Removed Literals\n"); | |
5002 | for (; r != NULL; r = r->next) | |
5003 | { | |
5004 | print_r_reloc (fp, &r->from); | |
5005 | fprintf (fp, " => "); | |
5006 | if (r->to.abfd == NULL) | |
5007 | fprintf (fp, "REMOVED"); | |
5008 | else | |
5009 | print_r_reloc (fp, &r->to); | |
5010 | fprintf (fp, "\n"); | |
5011 | } | |
5012 | } | |
5013 | ||
5014 | #endif /* DEBUG */ | |
5015 | ||
5016 | \f | |
5017 | /* Per-section data for relaxation. */ | |
5018 | ||
5019 | typedef struct reloc_bfd_fix_struct reloc_bfd_fix; | |
5020 | ||
5021 | struct xtensa_relax_info_struct | |
5022 | { | |
5023 | bfd_boolean is_relaxable_literal_section; | |
5024 | bfd_boolean is_relaxable_asm_section; | |
5025 | int visited; /* Number of times visited. */ | |
5026 | ||
5027 | source_reloc *src_relocs; /* Array[src_count]. */ | |
5028 | int src_count; | |
5029 | int src_next; /* Next src_relocs entry to assign. */ | |
5030 | ||
5031 | removed_literal_list removed_list; | |
5032 | text_action_list action_list; | |
5033 | ||
5034 | reloc_bfd_fix *fix_list; | |
5035 | reloc_bfd_fix *fix_array; | |
5036 | unsigned fix_array_count; | |
5037 | ||
5038 | /* Support for expanding the reloc array that is stored | |
5039 | in the section structure. If the relocations have been | |
5040 | reallocated, the newly allocated relocations will be referenced | |
5041 | here along with the actual size allocated. The relocation | |
5042 | count will always be found in the section structure. */ | |
5043 | Elf_Internal_Rela *allocated_relocs; | |
5044 | unsigned relocs_count; | |
5045 | unsigned allocated_relocs_count; | |
5046 | }; | |
5047 | ||
5048 | struct elf_xtensa_section_data | |
5049 | { | |
5050 | struct bfd_elf_section_data elf; | |
5051 | xtensa_relax_info relax_info; | |
5052 | }; | |
5053 | ||
43cd72b9 BW |
5054 | |
5055 | static bfd_boolean | |
7fa3d080 | 5056 | elf_xtensa_new_section_hook (bfd *abfd, asection *sec) |
43cd72b9 | 5057 | { |
f592407e AM |
5058 | if (!sec->used_by_bfd) |
5059 | { | |
5060 | struct elf_xtensa_section_data *sdata; | |
5061 | bfd_size_type amt = sizeof (*sdata); | |
43cd72b9 | 5062 | |
f592407e AM |
5063 | sdata = bfd_zalloc (abfd, amt); |
5064 | if (sdata == NULL) | |
5065 | return FALSE; | |
5066 | sec->used_by_bfd = sdata; | |
5067 | } | |
43cd72b9 BW |
5068 | |
5069 | return _bfd_elf_new_section_hook (abfd, sec); | |
5070 | } | |
5071 | ||
5072 | ||
7fa3d080 BW |
5073 | static xtensa_relax_info * |
5074 | get_xtensa_relax_info (asection *sec) | |
5075 | { | |
5076 | struct elf_xtensa_section_data *section_data; | |
5077 | ||
5078 | /* No info available if no section or if it is an output section. */ | |
5079 | if (!sec || sec == sec->output_section) | |
5080 | return NULL; | |
5081 | ||
5082 | section_data = (struct elf_xtensa_section_data *) elf_section_data (sec); | |
5083 | return §ion_data->relax_info; | |
5084 | } | |
5085 | ||
5086 | ||
43cd72b9 | 5087 | static void |
7fa3d080 | 5088 | init_xtensa_relax_info (asection *sec) |
43cd72b9 BW |
5089 | { |
5090 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5091 | ||
5092 | relax_info->is_relaxable_literal_section = FALSE; | |
5093 | relax_info->is_relaxable_asm_section = FALSE; | |
5094 | relax_info->visited = 0; | |
5095 | ||
5096 | relax_info->src_relocs = NULL; | |
5097 | relax_info->src_count = 0; | |
5098 | relax_info->src_next = 0; | |
5099 | ||
5100 | relax_info->removed_list.head = NULL; | |
5101 | relax_info->removed_list.tail = NULL; | |
5102 | ||
5103 | relax_info->action_list.head = NULL; | |
5104 | ||
5105 | relax_info->fix_list = NULL; | |
5106 | relax_info->fix_array = NULL; | |
5107 | relax_info->fix_array_count = 0; | |
5108 | ||
5109 | relax_info->allocated_relocs = NULL; | |
5110 | relax_info->relocs_count = 0; | |
5111 | relax_info->allocated_relocs_count = 0; | |
5112 | } | |
5113 | ||
43cd72b9 BW |
5114 | \f |
5115 | /* Coalescing literals may require a relocation to refer to a section in | |
5116 | a different input file, but the standard relocation information | |
5117 | cannot express that. Instead, the reloc_bfd_fix structures are used | |
5118 | to "fix" the relocations that refer to sections in other input files. | |
5119 | These structures are kept on per-section lists. The "src_type" field | |
5120 | records the relocation type in case there are multiple relocations on | |
5121 | the same location. FIXME: This is ugly; an alternative might be to | |
5122 | add new symbols with the "owner" field to some other input file. */ | |
5123 | ||
5124 | struct reloc_bfd_fix_struct | |
5125 | { | |
5126 | asection *src_sec; | |
5127 | bfd_vma src_offset; | |
5128 | unsigned src_type; /* Relocation type. */ | |
5129 | ||
43cd72b9 BW |
5130 | asection *target_sec; |
5131 | bfd_vma target_offset; | |
5132 | bfd_boolean translated; | |
5133 | ||
5134 | reloc_bfd_fix *next; | |
5135 | }; | |
5136 | ||
5137 | ||
43cd72b9 | 5138 | static reloc_bfd_fix * |
7fa3d080 BW |
5139 | reloc_bfd_fix_init (asection *src_sec, |
5140 | bfd_vma src_offset, | |
5141 | unsigned src_type, | |
7fa3d080 BW |
5142 | asection *target_sec, |
5143 | bfd_vma target_offset, | |
5144 | bfd_boolean translated) | |
43cd72b9 BW |
5145 | { |
5146 | reloc_bfd_fix *fix; | |
5147 | ||
5148 | fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix)); | |
5149 | fix->src_sec = src_sec; | |
5150 | fix->src_offset = src_offset; | |
5151 | fix->src_type = src_type; | |
43cd72b9 BW |
5152 | fix->target_sec = target_sec; |
5153 | fix->target_offset = target_offset; | |
5154 | fix->translated = translated; | |
5155 | ||
5156 | return fix; | |
5157 | } | |
5158 | ||
5159 | ||
5160 | static void | |
7fa3d080 | 5161 | add_fix (asection *src_sec, reloc_bfd_fix *fix) |
43cd72b9 BW |
5162 | { |
5163 | xtensa_relax_info *relax_info; | |
5164 | ||
5165 | relax_info = get_xtensa_relax_info (src_sec); | |
5166 | fix->next = relax_info->fix_list; | |
5167 | relax_info->fix_list = fix; | |
5168 | } | |
5169 | ||
5170 | ||
5171 | static int | |
7fa3d080 | 5172 | fix_compare (const void *ap, const void *bp) |
43cd72b9 BW |
5173 | { |
5174 | const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap; | |
5175 | const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp; | |
5176 | ||
5177 | if (a->src_offset != b->src_offset) | |
5178 | return (a->src_offset - b->src_offset); | |
5179 | return (a->src_type - b->src_type); | |
5180 | } | |
5181 | ||
5182 | ||
5183 | static void | |
7fa3d080 | 5184 | cache_fix_array (asection *sec) |
43cd72b9 BW |
5185 | { |
5186 | unsigned i, count = 0; | |
5187 | reloc_bfd_fix *r; | |
5188 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5189 | ||
5190 | if (relax_info == NULL) | |
5191 | return; | |
5192 | if (relax_info->fix_list == NULL) | |
5193 | return; | |
5194 | ||
5195 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
5196 | count++; | |
5197 | ||
5198 | relax_info->fix_array = | |
5199 | (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count); | |
5200 | relax_info->fix_array_count = count; | |
5201 | ||
5202 | r = relax_info->fix_list; | |
5203 | for (i = 0; i < count; i++, r = r->next) | |
5204 | { | |
5205 | relax_info->fix_array[count - 1 - i] = *r; | |
5206 | relax_info->fix_array[count - 1 - i].next = NULL; | |
5207 | } | |
5208 | ||
5209 | qsort (relax_info->fix_array, relax_info->fix_array_count, | |
5210 | sizeof (reloc_bfd_fix), fix_compare); | |
5211 | } | |
5212 | ||
5213 | ||
5214 | static reloc_bfd_fix * | |
7fa3d080 | 5215 | get_bfd_fix (asection *sec, bfd_vma offset, unsigned type) |
43cd72b9 BW |
5216 | { |
5217 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5218 | reloc_bfd_fix *rv; | |
5219 | reloc_bfd_fix key; | |
5220 | ||
5221 | if (relax_info == NULL) | |
5222 | return NULL; | |
5223 | if (relax_info->fix_list == NULL) | |
5224 | return NULL; | |
5225 | ||
5226 | if (relax_info->fix_array == NULL) | |
5227 | cache_fix_array (sec); | |
5228 | ||
5229 | key.src_offset = offset; | |
5230 | key.src_type = type; | |
5231 | rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count, | |
5232 | sizeof (reloc_bfd_fix), fix_compare); | |
5233 | return rv; | |
5234 | } | |
5235 | ||
5236 | \f | |
5237 | /* Section caching. */ | |
5238 | ||
5239 | typedef struct section_cache_struct section_cache_t; | |
5240 | ||
5241 | struct section_cache_struct | |
5242 | { | |
5243 | asection *sec; | |
5244 | ||
5245 | bfd_byte *contents; /* Cache of the section contents. */ | |
5246 | bfd_size_type content_length; | |
5247 | ||
5248 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
5249 | unsigned pte_count; | |
5250 | ||
5251 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
5252 | unsigned reloc_count; | |
5253 | }; | |
5254 | ||
5255 | ||
7fa3d080 BW |
5256 | static void |
5257 | init_section_cache (section_cache_t *sec_cache) | |
5258 | { | |
5259 | memset (sec_cache, 0, sizeof (*sec_cache)); | |
5260 | } | |
43cd72b9 BW |
5261 | |
5262 | ||
5263 | static void | |
7fa3d080 | 5264 | clear_section_cache (section_cache_t *sec_cache) |
43cd72b9 | 5265 | { |
7fa3d080 BW |
5266 | if (sec_cache->sec) |
5267 | { | |
5268 | release_contents (sec_cache->sec, sec_cache->contents); | |
5269 | release_internal_relocs (sec_cache->sec, sec_cache->relocs); | |
5270 | if (sec_cache->ptbl) | |
5271 | free (sec_cache->ptbl); | |
5272 | memset (sec_cache, 0, sizeof (sec_cache)); | |
5273 | } | |
43cd72b9 BW |
5274 | } |
5275 | ||
5276 | ||
5277 | static bfd_boolean | |
7fa3d080 BW |
5278 | section_cache_section (section_cache_t *sec_cache, |
5279 | asection *sec, | |
5280 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
5281 | { |
5282 | bfd *abfd; | |
5283 | property_table_entry *prop_table = NULL; | |
5284 | int ptblsize = 0; | |
5285 | bfd_byte *contents = NULL; | |
5286 | Elf_Internal_Rela *internal_relocs = NULL; | |
5287 | bfd_size_type sec_size; | |
5288 | ||
5289 | if (sec == NULL) | |
5290 | return FALSE; | |
5291 | if (sec == sec_cache->sec) | |
5292 | return TRUE; | |
5293 | ||
5294 | abfd = sec->owner; | |
5295 | sec_size = bfd_get_section_limit (abfd, sec); | |
5296 | ||
5297 | /* Get the contents. */ | |
5298 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
5299 | if (contents == NULL && sec_size != 0) | |
5300 | goto err; | |
5301 | ||
5302 | /* Get the relocations. */ | |
5303 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
5304 | link_info->keep_memory); | |
5305 | ||
5306 | /* Get the entry table. */ | |
5307 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, | |
5308 | XTENSA_PROP_SEC_NAME, FALSE); | |
5309 | if (ptblsize < 0) | |
5310 | goto err; | |
5311 | ||
5312 | /* Fill in the new section cache. */ | |
5313 | clear_section_cache (sec_cache); | |
5314 | memset (sec_cache, 0, sizeof (sec_cache)); | |
5315 | ||
5316 | sec_cache->sec = sec; | |
5317 | sec_cache->contents = contents; | |
5318 | sec_cache->content_length = sec_size; | |
5319 | sec_cache->relocs = internal_relocs; | |
5320 | sec_cache->reloc_count = sec->reloc_count; | |
5321 | sec_cache->pte_count = ptblsize; | |
5322 | sec_cache->ptbl = prop_table; | |
5323 | ||
5324 | return TRUE; | |
5325 | ||
5326 | err: | |
5327 | release_contents (sec, contents); | |
5328 | release_internal_relocs (sec, internal_relocs); | |
5329 | if (prop_table) | |
5330 | free (prop_table); | |
5331 | return FALSE; | |
5332 | } | |
5333 | ||
43cd72b9 BW |
5334 | \f |
5335 | /* Extended basic blocks. */ | |
5336 | ||
5337 | /* An ebb_struct represents an Extended Basic Block. Within this | |
5338 | range, we guarantee that all instructions are decodable, the | |
5339 | property table entries are contiguous, and no property table | |
5340 | specifies a segment that cannot have instructions moved. This | |
5341 | structure contains caches of the contents, property table and | |
5342 | relocations for the specified section for easy use. The range is | |
5343 | specified by ranges of indices for the byte offset, property table | |
5344 | offsets and relocation offsets. These must be consistent. */ | |
5345 | ||
5346 | typedef struct ebb_struct ebb_t; | |
5347 | ||
5348 | struct ebb_struct | |
5349 | { | |
5350 | asection *sec; | |
5351 | ||
5352 | bfd_byte *contents; /* Cache of the section contents. */ | |
5353 | bfd_size_type content_length; | |
5354 | ||
5355 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
5356 | unsigned pte_count; | |
5357 | ||
5358 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
5359 | unsigned reloc_count; | |
5360 | ||
5361 | bfd_vma start_offset; /* Offset in section. */ | |
5362 | unsigned start_ptbl_idx; /* Offset in the property table. */ | |
5363 | unsigned start_reloc_idx; /* Offset in the relocations. */ | |
5364 | ||
5365 | bfd_vma end_offset; | |
5366 | unsigned end_ptbl_idx; | |
5367 | unsigned end_reloc_idx; | |
5368 | ||
5369 | bfd_boolean ends_section; /* Is this the last ebb in a section? */ | |
5370 | ||
5371 | /* The unreachable property table at the end of this set of blocks; | |
5372 | NULL if the end is not an unreachable block. */ | |
5373 | property_table_entry *ends_unreachable; | |
5374 | }; | |
5375 | ||
5376 | ||
5377 | enum ebb_target_enum | |
5378 | { | |
5379 | EBB_NO_ALIGN = 0, | |
5380 | EBB_DESIRE_TGT_ALIGN, | |
5381 | EBB_REQUIRE_TGT_ALIGN, | |
5382 | EBB_REQUIRE_LOOP_ALIGN, | |
5383 | EBB_REQUIRE_ALIGN | |
5384 | }; | |
5385 | ||
5386 | ||
5387 | /* proposed_action_struct is similar to the text_action_struct except | |
5388 | that is represents a potential transformation, not one that will | |
5389 | occur. We build a list of these for an extended basic block | |
5390 | and use them to compute the actual actions desired. We must be | |
5391 | careful that the entire set of actual actions we perform do not | |
5392 | break any relocations that would fit if the actions were not | |
5393 | performed. */ | |
5394 | ||
5395 | typedef struct proposed_action_struct proposed_action; | |
5396 | ||
5397 | struct proposed_action_struct | |
5398 | { | |
5399 | enum ebb_target_enum align_type; /* for the target alignment */ | |
5400 | bfd_vma alignment_pow; | |
5401 | text_action_t action; | |
5402 | bfd_vma offset; | |
5403 | int removed_bytes; | |
5404 | bfd_boolean do_action; /* If false, then we will not perform the action. */ | |
5405 | }; | |
5406 | ||
5407 | ||
5408 | /* The ebb_constraint_struct keeps a set of proposed actions for an | |
5409 | extended basic block. */ | |
5410 | ||
5411 | typedef struct ebb_constraint_struct ebb_constraint; | |
5412 | ||
5413 | struct ebb_constraint_struct | |
5414 | { | |
5415 | ebb_t ebb; | |
5416 | bfd_boolean start_movable; | |
5417 | ||
5418 | /* Bytes of extra space at the beginning if movable. */ | |
5419 | int start_extra_space; | |
5420 | ||
5421 | enum ebb_target_enum start_align; | |
5422 | ||
5423 | bfd_boolean end_movable; | |
5424 | ||
5425 | /* Bytes of extra space at the end if movable. */ | |
5426 | int end_extra_space; | |
5427 | ||
5428 | unsigned action_count; | |
5429 | unsigned action_allocated; | |
5430 | ||
5431 | /* Array of proposed actions. */ | |
5432 | proposed_action *actions; | |
5433 | ||
5434 | /* Action alignments -- one for each proposed action. */ | |
5435 | enum ebb_target_enum *action_aligns; | |
5436 | }; | |
5437 | ||
5438 | ||
43cd72b9 | 5439 | static void |
7fa3d080 | 5440 | init_ebb_constraint (ebb_constraint *c) |
43cd72b9 BW |
5441 | { |
5442 | memset (c, 0, sizeof (ebb_constraint)); | |
5443 | } | |
5444 | ||
5445 | ||
5446 | static void | |
7fa3d080 | 5447 | free_ebb_constraint (ebb_constraint *c) |
43cd72b9 | 5448 | { |
7fa3d080 | 5449 | if (c->actions) |
43cd72b9 BW |
5450 | free (c->actions); |
5451 | } | |
5452 | ||
5453 | ||
5454 | static void | |
7fa3d080 BW |
5455 | init_ebb (ebb_t *ebb, |
5456 | asection *sec, | |
5457 | bfd_byte *contents, | |
5458 | bfd_size_type content_length, | |
5459 | property_table_entry *prop_table, | |
5460 | unsigned ptblsize, | |
5461 | Elf_Internal_Rela *internal_relocs, | |
5462 | unsigned reloc_count) | |
43cd72b9 BW |
5463 | { |
5464 | memset (ebb, 0, sizeof (ebb_t)); | |
5465 | ebb->sec = sec; | |
5466 | ebb->contents = contents; | |
5467 | ebb->content_length = content_length; | |
5468 | ebb->ptbl = prop_table; | |
5469 | ebb->pte_count = ptblsize; | |
5470 | ebb->relocs = internal_relocs; | |
5471 | ebb->reloc_count = reloc_count; | |
5472 | ebb->start_offset = 0; | |
5473 | ebb->end_offset = ebb->content_length - 1; | |
5474 | ebb->start_ptbl_idx = 0; | |
5475 | ebb->end_ptbl_idx = ptblsize; | |
5476 | ebb->start_reloc_idx = 0; | |
5477 | ebb->end_reloc_idx = reloc_count; | |
5478 | } | |
5479 | ||
5480 | ||
5481 | /* Extend the ebb to all decodable contiguous sections. The algorithm | |
5482 | for building a basic block around an instruction is to push it | |
5483 | forward until we hit the end of a section, an unreachable block or | |
5484 | a block that cannot be transformed. Then we push it backwards | |
5485 | searching for similar conditions. */ | |
5486 | ||
7fa3d080 BW |
5487 | static bfd_boolean extend_ebb_bounds_forward (ebb_t *); |
5488 | static bfd_boolean extend_ebb_bounds_backward (ebb_t *); | |
5489 | static bfd_size_type insn_block_decodable_len | |
5490 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type); | |
5491 | ||
43cd72b9 | 5492 | static bfd_boolean |
7fa3d080 | 5493 | extend_ebb_bounds (ebb_t *ebb) |
43cd72b9 BW |
5494 | { |
5495 | if (!extend_ebb_bounds_forward (ebb)) | |
5496 | return FALSE; | |
5497 | if (!extend_ebb_bounds_backward (ebb)) | |
5498 | return FALSE; | |
5499 | return TRUE; | |
5500 | } | |
5501 | ||
5502 | ||
5503 | static bfd_boolean | |
7fa3d080 | 5504 | extend_ebb_bounds_forward (ebb_t *ebb) |
43cd72b9 BW |
5505 | { |
5506 | property_table_entry *the_entry, *new_entry; | |
5507 | ||
5508 | the_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
5509 | ||
5510 | /* Stop when (1) we cannot decode an instruction, (2) we are at | |
5511 | the end of the property tables, (3) we hit a non-contiguous property | |
5512 | table entry, (4) we hit a NO_TRANSFORM region. */ | |
5513 | ||
5514 | while (1) | |
5515 | { | |
5516 | bfd_vma entry_end; | |
5517 | bfd_size_type insn_block_len; | |
5518 | ||
5519 | entry_end = the_entry->address - ebb->sec->vma + the_entry->size; | |
5520 | insn_block_len = | |
5521 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
5522 | ebb->end_offset, | |
5523 | entry_end - ebb->end_offset); | |
5524 | if (insn_block_len != (entry_end - ebb->end_offset)) | |
5525 | { | |
5526 | (*_bfd_error_handler) | |
5527 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
5528 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
5529 | return FALSE; | |
5530 | } | |
5531 | ebb->end_offset += insn_block_len; | |
5532 | ||
5533 | if (ebb->end_offset == ebb->sec->size) | |
5534 | ebb->ends_section = TRUE; | |
5535 | ||
5536 | /* Update the reloc counter. */ | |
5537 | while (ebb->end_reloc_idx + 1 < ebb->reloc_count | |
5538 | && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset | |
5539 | < ebb->end_offset)) | |
5540 | { | |
5541 | ebb->end_reloc_idx++; | |
5542 | } | |
5543 | ||
5544 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
5545 | return TRUE; | |
5546 | ||
5547 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
5548 | if (((new_entry->flags & XTENSA_PROP_INSN) == 0) | |
99ded152 | 5549 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
5550 | || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
5551 | break; | |
5552 | ||
5553 | if (the_entry->address + the_entry->size != new_entry->address) | |
5554 | break; | |
5555 | ||
5556 | the_entry = new_entry; | |
5557 | ebb->end_ptbl_idx++; | |
5558 | } | |
5559 | ||
5560 | /* Quick check for an unreachable or end of file just at the end. */ | |
5561 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
5562 | { | |
5563 | if (ebb->end_offset == ebb->content_length) | |
5564 | ebb->ends_section = TRUE; | |
5565 | } | |
5566 | else | |
5567 | { | |
5568 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
5569 | if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0 | |
5570 | && the_entry->address + the_entry->size == new_entry->address) | |
5571 | ebb->ends_unreachable = new_entry; | |
5572 | } | |
5573 | ||
5574 | /* Any other ending requires exact alignment. */ | |
5575 | return TRUE; | |
5576 | } | |
5577 | ||
5578 | ||
5579 | static bfd_boolean | |
7fa3d080 | 5580 | extend_ebb_bounds_backward (ebb_t *ebb) |
43cd72b9 BW |
5581 | { |
5582 | property_table_entry *the_entry, *new_entry; | |
5583 | ||
5584 | the_entry = &ebb->ptbl[ebb->start_ptbl_idx]; | |
5585 | ||
5586 | /* Stop when (1) we cannot decode the instructions in the current entry. | |
5587 | (2) we are at the beginning of the property tables, (3) we hit a | |
5588 | non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */ | |
5589 | ||
5590 | while (1) | |
5591 | { | |
5592 | bfd_vma block_begin; | |
5593 | bfd_size_type insn_block_len; | |
5594 | ||
5595 | block_begin = the_entry->address - ebb->sec->vma; | |
5596 | insn_block_len = | |
5597 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
5598 | block_begin, | |
5599 | ebb->start_offset - block_begin); | |
5600 | if (insn_block_len != ebb->start_offset - block_begin) | |
5601 | { | |
5602 | (*_bfd_error_handler) | |
5603 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
5604 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
5605 | return FALSE; | |
5606 | } | |
5607 | ebb->start_offset -= insn_block_len; | |
5608 | ||
5609 | /* Update the reloc counter. */ | |
5610 | while (ebb->start_reloc_idx > 0 | |
5611 | && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset | |
5612 | >= ebb->start_offset)) | |
5613 | { | |
5614 | ebb->start_reloc_idx--; | |
5615 | } | |
5616 | ||
5617 | if (ebb->start_ptbl_idx == 0) | |
5618 | return TRUE; | |
5619 | ||
5620 | new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1]; | |
5621 | if ((new_entry->flags & XTENSA_PROP_INSN) == 0 | |
99ded152 | 5622 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
5623 | || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
5624 | return TRUE; | |
5625 | if (new_entry->address + new_entry->size != the_entry->address) | |
5626 | return TRUE; | |
5627 | ||
5628 | the_entry = new_entry; | |
5629 | ebb->start_ptbl_idx--; | |
5630 | } | |
5631 | return TRUE; | |
5632 | } | |
5633 | ||
5634 | ||
5635 | static bfd_size_type | |
7fa3d080 BW |
5636 | insn_block_decodable_len (bfd_byte *contents, |
5637 | bfd_size_type content_len, | |
5638 | bfd_vma block_offset, | |
5639 | bfd_size_type block_len) | |
43cd72b9 BW |
5640 | { |
5641 | bfd_vma offset = block_offset; | |
5642 | ||
5643 | while (offset < block_offset + block_len) | |
5644 | { | |
5645 | bfd_size_type insn_len = 0; | |
5646 | ||
5647 | insn_len = insn_decode_len (contents, content_len, offset); | |
5648 | if (insn_len == 0) | |
5649 | return (offset - block_offset); | |
5650 | offset += insn_len; | |
5651 | } | |
5652 | return (offset - block_offset); | |
5653 | } | |
5654 | ||
5655 | ||
5656 | static void | |
7fa3d080 | 5657 | ebb_propose_action (ebb_constraint *c, |
7fa3d080 | 5658 | enum ebb_target_enum align_type, |
288f74fa | 5659 | bfd_vma alignment_pow, |
7fa3d080 BW |
5660 | text_action_t action, |
5661 | bfd_vma offset, | |
5662 | int removed_bytes, | |
5663 | bfd_boolean do_action) | |
43cd72b9 | 5664 | { |
b08b5071 | 5665 | proposed_action *act; |
43cd72b9 | 5666 | |
43cd72b9 BW |
5667 | if (c->action_allocated <= c->action_count) |
5668 | { | |
b08b5071 | 5669 | unsigned new_allocated, i; |
823fc61f | 5670 | proposed_action *new_actions; |
b08b5071 BW |
5671 | |
5672 | new_allocated = (c->action_count + 2) * 2; | |
823fc61f | 5673 | new_actions = (proposed_action *) |
43cd72b9 BW |
5674 | bfd_zmalloc (sizeof (proposed_action) * new_allocated); |
5675 | ||
5676 | for (i = 0; i < c->action_count; i++) | |
5677 | new_actions[i] = c->actions[i]; | |
7fa3d080 | 5678 | if (c->actions) |
43cd72b9 BW |
5679 | free (c->actions); |
5680 | c->actions = new_actions; | |
5681 | c->action_allocated = new_allocated; | |
5682 | } | |
b08b5071 BW |
5683 | |
5684 | act = &c->actions[c->action_count]; | |
5685 | act->align_type = align_type; | |
5686 | act->alignment_pow = alignment_pow; | |
5687 | act->action = action; | |
5688 | act->offset = offset; | |
5689 | act->removed_bytes = removed_bytes; | |
5690 | act->do_action = do_action; | |
5691 | ||
43cd72b9 BW |
5692 | c->action_count++; |
5693 | } | |
5694 | ||
5695 | \f | |
5696 | /* Access to internal relocations, section contents and symbols. */ | |
5697 | ||
5698 | /* During relaxation, we need to modify relocations, section contents, | |
5699 | and symbol definitions, and we need to keep the original values from | |
5700 | being reloaded from the input files, i.e., we need to "pin" the | |
5701 | modified values in memory. We also want to continue to observe the | |
5702 | setting of the "keep-memory" flag. The following functions wrap the | |
5703 | standard BFD functions to take care of this for us. */ | |
5704 | ||
5705 | static Elf_Internal_Rela * | |
7fa3d080 | 5706 | retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
5707 | { |
5708 | Elf_Internal_Rela *internal_relocs; | |
5709 | ||
5710 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
5711 | return NULL; | |
5712 | ||
5713 | internal_relocs = elf_section_data (sec)->relocs; | |
5714 | if (internal_relocs == NULL) | |
5715 | internal_relocs = (_bfd_elf_link_read_relocs | |
7fa3d080 | 5716 | (abfd, sec, NULL, NULL, keep_memory)); |
43cd72b9 BW |
5717 | return internal_relocs; |
5718 | } | |
5719 | ||
5720 | ||
5721 | static void | |
7fa3d080 | 5722 | pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
5723 | { |
5724 | elf_section_data (sec)->relocs = internal_relocs; | |
5725 | } | |
5726 | ||
5727 | ||
5728 | static void | |
7fa3d080 | 5729 | release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
5730 | { |
5731 | if (internal_relocs | |
5732 | && elf_section_data (sec)->relocs != internal_relocs) | |
5733 | free (internal_relocs); | |
5734 | } | |
5735 | ||
5736 | ||
5737 | static bfd_byte * | |
7fa3d080 | 5738 | retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
5739 | { |
5740 | bfd_byte *contents; | |
5741 | bfd_size_type sec_size; | |
5742 | ||
5743 | sec_size = bfd_get_section_limit (abfd, sec); | |
5744 | contents = elf_section_data (sec)->this_hdr.contents; | |
5745 | ||
5746 | if (contents == NULL && sec_size != 0) | |
5747 | { | |
5748 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
5749 | { | |
7fa3d080 | 5750 | if (contents) |
43cd72b9 BW |
5751 | free (contents); |
5752 | return NULL; | |
5753 | } | |
5754 | if (keep_memory) | |
5755 | elf_section_data (sec)->this_hdr.contents = contents; | |
5756 | } | |
5757 | return contents; | |
5758 | } | |
5759 | ||
5760 | ||
5761 | static void | |
7fa3d080 | 5762 | pin_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
5763 | { |
5764 | elf_section_data (sec)->this_hdr.contents = contents; | |
5765 | } | |
5766 | ||
5767 | ||
5768 | static void | |
7fa3d080 | 5769 | release_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
5770 | { |
5771 | if (contents && elf_section_data (sec)->this_hdr.contents != contents) | |
5772 | free (contents); | |
5773 | } | |
5774 | ||
5775 | ||
5776 | static Elf_Internal_Sym * | |
7fa3d080 | 5777 | retrieve_local_syms (bfd *input_bfd) |
43cd72b9 BW |
5778 | { |
5779 | Elf_Internal_Shdr *symtab_hdr; | |
5780 | Elf_Internal_Sym *isymbuf; | |
5781 | size_t locsymcount; | |
5782 | ||
5783 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
5784 | locsymcount = symtab_hdr->sh_info; | |
5785 | ||
5786 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
5787 | if (isymbuf == NULL && locsymcount != 0) | |
5788 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
5789 | NULL, NULL, NULL); | |
5790 | ||
5791 | /* Save the symbols for this input file so they won't be read again. */ | |
5792 | if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents) | |
5793 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
5794 | ||
5795 | return isymbuf; | |
5796 | } | |
5797 | ||
5798 | \f | |
5799 | /* Code for link-time relaxation. */ | |
5800 | ||
5801 | /* Initialization for relaxation: */ | |
7fa3d080 | 5802 | static bfd_boolean analyze_relocations (struct bfd_link_info *); |
43cd72b9 | 5803 | static bfd_boolean find_relaxable_sections |
7fa3d080 | 5804 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
43cd72b9 | 5805 | static bfd_boolean collect_source_relocs |
7fa3d080 | 5806 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 | 5807 | static bfd_boolean is_resolvable_asm_expansion |
7fa3d080 BW |
5808 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *, |
5809 | bfd_boolean *); | |
43cd72b9 | 5810 | static Elf_Internal_Rela *find_associated_l32r_irel |
7fa3d080 | 5811 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *); |
43cd72b9 | 5812 | static bfd_boolean compute_text_actions |
7fa3d080 BW |
5813 | (bfd *, asection *, struct bfd_link_info *); |
5814 | static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *); | |
5815 | static bfd_boolean compute_ebb_actions (ebb_constraint *); | |
43cd72b9 | 5816 | static bfd_boolean check_section_ebb_pcrels_fit |
cb337148 BW |
5817 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, const ebb_constraint *, |
5818 | const xtensa_opcode *); | |
7fa3d080 | 5819 | static bfd_boolean check_section_ebb_reduces (const ebb_constraint *); |
43cd72b9 | 5820 | static void text_action_add_proposed |
7fa3d080 BW |
5821 | (text_action_list *, const ebb_constraint *, asection *); |
5822 | static int compute_fill_extra_space (property_table_entry *); | |
43cd72b9 BW |
5823 | |
5824 | /* First pass: */ | |
5825 | static bfd_boolean compute_removed_literals | |
7fa3d080 | 5826 | (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *); |
43cd72b9 | 5827 | static Elf_Internal_Rela *get_irel_at_offset |
7fa3d080 | 5828 | (asection *, Elf_Internal_Rela *, bfd_vma); |
43cd72b9 | 5829 | static bfd_boolean is_removable_literal |
99ded152 BW |
5830 | (const source_reloc *, int, const source_reloc *, int, asection *, |
5831 | property_table_entry *, int); | |
43cd72b9 | 5832 | static bfd_boolean remove_dead_literal |
7fa3d080 BW |
5833 | (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
5834 | Elf_Internal_Rela *, source_reloc *, property_table_entry *, int); | |
5835 | static bfd_boolean identify_literal_placement | |
5836 | (bfd *, asection *, bfd_byte *, struct bfd_link_info *, | |
5837 | value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int, | |
5838 | source_reloc *, property_table_entry *, int, section_cache_t *, | |
5839 | bfd_boolean); | |
5840 | static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *); | |
43cd72b9 | 5841 | static bfd_boolean coalesce_shared_literal |
7fa3d080 | 5842 | (asection *, source_reloc *, property_table_entry *, int, value_map *); |
43cd72b9 | 5843 | static bfd_boolean move_shared_literal |
7fa3d080 BW |
5844 | (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *, |
5845 | int, const r_reloc *, const literal_value *, section_cache_t *); | |
43cd72b9 BW |
5846 | |
5847 | /* Second pass: */ | |
7fa3d080 BW |
5848 | static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *); |
5849 | static bfd_boolean translate_section_fixes (asection *); | |
5850 | static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *); | |
9b7f5d20 | 5851 | static asection *translate_reloc (const r_reloc *, r_reloc *, asection *); |
43cd72b9 | 5852 | static void shrink_dynamic_reloc_sections |
7fa3d080 | 5853 | (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *); |
43cd72b9 | 5854 | static bfd_boolean move_literal |
7fa3d080 BW |
5855 | (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *, |
5856 | xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *); | |
43cd72b9 | 5857 | static bfd_boolean relax_property_section |
7fa3d080 | 5858 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 BW |
5859 | |
5860 | /* Third pass: */ | |
7fa3d080 | 5861 | static bfd_boolean relax_section_symbols (bfd *, asection *); |
43cd72b9 BW |
5862 | |
5863 | ||
5864 | static bfd_boolean | |
7fa3d080 BW |
5865 | elf_xtensa_relax_section (bfd *abfd, |
5866 | asection *sec, | |
5867 | struct bfd_link_info *link_info, | |
5868 | bfd_boolean *again) | |
43cd72b9 BW |
5869 | { |
5870 | static value_map_hash_table *values = NULL; | |
5871 | static bfd_boolean relocations_analyzed = FALSE; | |
5872 | xtensa_relax_info *relax_info; | |
5873 | ||
5874 | if (!relocations_analyzed) | |
5875 | { | |
5876 | /* Do some overall initialization for relaxation. */ | |
5877 | values = value_map_hash_table_init (); | |
5878 | if (values == NULL) | |
5879 | return FALSE; | |
5880 | relaxing_section = TRUE; | |
5881 | if (!analyze_relocations (link_info)) | |
5882 | return FALSE; | |
5883 | relocations_analyzed = TRUE; | |
5884 | } | |
5885 | *again = FALSE; | |
5886 | ||
5887 | /* Don't mess with linker-created sections. */ | |
5888 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
5889 | return TRUE; | |
5890 | ||
5891 | relax_info = get_xtensa_relax_info (sec); | |
5892 | BFD_ASSERT (relax_info != NULL); | |
5893 | ||
5894 | switch (relax_info->visited) | |
5895 | { | |
5896 | case 0: | |
5897 | /* Note: It would be nice to fold this pass into | |
5898 | analyze_relocations, but it is important for this step that the | |
5899 | sections be examined in link order. */ | |
5900 | if (!compute_removed_literals (abfd, sec, link_info, values)) | |
5901 | return FALSE; | |
5902 | *again = TRUE; | |
5903 | break; | |
5904 | ||
5905 | case 1: | |
5906 | if (values) | |
5907 | value_map_hash_table_delete (values); | |
5908 | values = NULL; | |
5909 | if (!relax_section (abfd, sec, link_info)) | |
5910 | return FALSE; | |
5911 | *again = TRUE; | |
5912 | break; | |
5913 | ||
5914 | case 2: | |
5915 | if (!relax_section_symbols (abfd, sec)) | |
5916 | return FALSE; | |
5917 | break; | |
5918 | } | |
5919 | ||
5920 | relax_info->visited++; | |
5921 | return TRUE; | |
5922 | } | |
5923 | ||
5924 | \f | |
5925 | /* Initialization for relaxation. */ | |
5926 | ||
5927 | /* This function is called once at the start of relaxation. It scans | |
5928 | all the input sections and marks the ones that are relaxable (i.e., | |
5929 | literal sections with L32R relocations against them), and then | |
5930 | collects source_reloc information for all the relocations against | |
5931 | those relaxable sections. During this process, it also detects | |
5932 | longcalls, i.e., calls relaxed by the assembler into indirect | |
5933 | calls, that can be optimized back into direct calls. Within each | |
5934 | extended basic block (ebb) containing an optimized longcall, it | |
5935 | computes a set of "text actions" that can be performed to remove | |
5936 | the L32R associated with the longcall while optionally preserving | |
5937 | branch target alignments. */ | |
5938 | ||
5939 | static bfd_boolean | |
7fa3d080 | 5940 | analyze_relocations (struct bfd_link_info *link_info) |
43cd72b9 BW |
5941 | { |
5942 | bfd *abfd; | |
5943 | asection *sec; | |
5944 | bfd_boolean is_relaxable = FALSE; | |
5945 | ||
5946 | /* Initialize the per-section relaxation info. */ | |
5947 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5948 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5949 | { | |
5950 | init_xtensa_relax_info (sec); | |
5951 | } | |
5952 | ||
5953 | /* Mark relaxable sections (and count relocations against each one). */ | |
5954 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5955 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5956 | { | |
5957 | if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable)) | |
5958 | return FALSE; | |
5959 | } | |
5960 | ||
5961 | /* Bail out if there are no relaxable sections. */ | |
5962 | if (!is_relaxable) | |
5963 | return TRUE; | |
5964 | ||
5965 | /* Allocate space for source_relocs. */ | |
5966 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5967 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5968 | { | |
5969 | xtensa_relax_info *relax_info; | |
5970 | ||
5971 | relax_info = get_xtensa_relax_info (sec); | |
5972 | if (relax_info->is_relaxable_literal_section | |
5973 | || relax_info->is_relaxable_asm_section) | |
5974 | { | |
5975 | relax_info->src_relocs = (source_reloc *) | |
5976 | bfd_malloc (relax_info->src_count * sizeof (source_reloc)); | |
5977 | } | |
25c6282a BW |
5978 | else |
5979 | relax_info->src_count = 0; | |
43cd72b9 BW |
5980 | } |
5981 | ||
5982 | /* Collect info on relocations against each relaxable section. */ | |
5983 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5984 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5985 | { | |
5986 | if (!collect_source_relocs (abfd, sec, link_info)) | |
5987 | return FALSE; | |
5988 | } | |
5989 | ||
5990 | /* Compute the text actions. */ | |
5991 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5992 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5993 | { | |
5994 | if (!compute_text_actions (abfd, sec, link_info)) | |
5995 | return FALSE; | |
5996 | } | |
5997 | ||
5998 | return TRUE; | |
5999 | } | |
6000 | ||
6001 | ||
6002 | /* Find all the sections that might be relaxed. The motivation for | |
6003 | this pass is that collect_source_relocs() needs to record _all_ the | |
6004 | relocations that target each relaxable section. That is expensive | |
6005 | and unnecessary unless the target section is actually going to be | |
6006 | relaxed. This pass identifies all such sections by checking if | |
6007 | they have L32Rs pointing to them. In the process, the total number | |
6008 | of relocations targeting each section is also counted so that we | |
6009 | know how much space to allocate for source_relocs against each | |
6010 | relaxable literal section. */ | |
6011 | ||
6012 | static bfd_boolean | |
7fa3d080 BW |
6013 | find_relaxable_sections (bfd *abfd, |
6014 | asection *sec, | |
6015 | struct bfd_link_info *link_info, | |
6016 | bfd_boolean *is_relaxable_p) | |
43cd72b9 BW |
6017 | { |
6018 | Elf_Internal_Rela *internal_relocs; | |
6019 | bfd_byte *contents; | |
6020 | bfd_boolean ok = TRUE; | |
6021 | unsigned i; | |
6022 | xtensa_relax_info *source_relax_info; | |
25c6282a | 6023 | bfd_boolean is_l32r_reloc; |
43cd72b9 BW |
6024 | |
6025 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6026 | link_info->keep_memory); | |
6027 | if (internal_relocs == NULL) | |
6028 | return ok; | |
6029 | ||
6030 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6031 | if (contents == NULL && sec->size != 0) | |
6032 | { | |
6033 | ok = FALSE; | |
6034 | goto error_return; | |
6035 | } | |
6036 | ||
6037 | source_relax_info = get_xtensa_relax_info (sec); | |
6038 | for (i = 0; i < sec->reloc_count; i++) | |
6039 | { | |
6040 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6041 | r_reloc r_rel; | |
6042 | asection *target_sec; | |
6043 | xtensa_relax_info *target_relax_info; | |
6044 | ||
6045 | /* If this section has not already been marked as "relaxable", and | |
6046 | if it contains any ASM_EXPAND relocations (marking expanded | |
6047 | longcalls) that can be optimized into direct calls, then mark | |
6048 | the section as "relaxable". */ | |
6049 | if (source_relax_info | |
6050 | && !source_relax_info->is_relaxable_asm_section | |
6051 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND) | |
6052 | { | |
6053 | bfd_boolean is_reachable = FALSE; | |
6054 | if (is_resolvable_asm_expansion (abfd, sec, contents, irel, | |
6055 | link_info, &is_reachable) | |
6056 | && is_reachable) | |
6057 | { | |
6058 | source_relax_info->is_relaxable_asm_section = TRUE; | |
6059 | *is_relaxable_p = TRUE; | |
6060 | } | |
6061 | } | |
6062 | ||
6063 | r_reloc_init (&r_rel, abfd, irel, contents, | |
6064 | bfd_get_section_limit (abfd, sec)); | |
6065 | ||
6066 | target_sec = r_reloc_get_section (&r_rel); | |
6067 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6068 | if (!target_relax_info) | |
6069 | continue; | |
6070 | ||
6071 | /* Count PC-relative operand relocations against the target section. | |
6072 | Note: The conditions tested here must match the conditions under | |
6073 | which init_source_reloc is called in collect_source_relocs(). */ | |
25c6282a BW |
6074 | is_l32r_reloc = FALSE; |
6075 | if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6076 | { | |
6077 | xtensa_opcode opcode = | |
6078 | get_relocation_opcode (abfd, sec, contents, irel); | |
6079 | if (opcode != XTENSA_UNDEFINED) | |
6080 | { | |
6081 | is_l32r_reloc = (opcode == get_l32r_opcode ()); | |
6082 | if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info)) | |
6083 | || is_l32r_reloc) | |
6084 | target_relax_info->src_count++; | |
6085 | } | |
6086 | } | |
43cd72b9 | 6087 | |
25c6282a | 6088 | if (is_l32r_reloc && r_reloc_is_defined (&r_rel)) |
43cd72b9 BW |
6089 | { |
6090 | /* Mark the target section as relaxable. */ | |
6091 | target_relax_info->is_relaxable_literal_section = TRUE; | |
6092 | *is_relaxable_p = TRUE; | |
6093 | } | |
6094 | } | |
6095 | ||
6096 | error_return: | |
6097 | release_contents (sec, contents); | |
6098 | release_internal_relocs (sec, internal_relocs); | |
6099 | return ok; | |
6100 | } | |
6101 | ||
6102 | ||
6103 | /* Record _all_ the relocations that point to relaxable sections, and | |
6104 | get rid of ASM_EXPAND relocs by either converting them to | |
6105 | ASM_SIMPLIFY or by removing them. */ | |
6106 | ||
6107 | static bfd_boolean | |
7fa3d080 BW |
6108 | collect_source_relocs (bfd *abfd, |
6109 | asection *sec, | |
6110 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6111 | { |
6112 | Elf_Internal_Rela *internal_relocs; | |
6113 | bfd_byte *contents; | |
6114 | bfd_boolean ok = TRUE; | |
6115 | unsigned i; | |
6116 | bfd_size_type sec_size; | |
6117 | ||
6118 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6119 | link_info->keep_memory); | |
6120 | if (internal_relocs == NULL) | |
6121 | return ok; | |
6122 | ||
6123 | sec_size = bfd_get_section_limit (abfd, sec); | |
6124 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6125 | if (contents == NULL && sec_size != 0) | |
6126 | { | |
6127 | ok = FALSE; | |
6128 | goto error_return; | |
6129 | } | |
6130 | ||
6131 | /* Record relocations against relaxable literal sections. */ | |
6132 | for (i = 0; i < sec->reloc_count; i++) | |
6133 | { | |
6134 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6135 | r_reloc r_rel; | |
6136 | asection *target_sec; | |
6137 | xtensa_relax_info *target_relax_info; | |
6138 | ||
6139 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6140 | ||
6141 | target_sec = r_reloc_get_section (&r_rel); | |
6142 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6143 | ||
6144 | if (target_relax_info | |
6145 | && (target_relax_info->is_relaxable_literal_section | |
6146 | || target_relax_info->is_relaxable_asm_section)) | |
6147 | { | |
6148 | xtensa_opcode opcode = XTENSA_UNDEFINED; | |
6149 | int opnd = -1; | |
6150 | bfd_boolean is_abs_literal = FALSE; | |
6151 | ||
6152 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
6153 | { | |
6154 | /* None of the current alternate relocs are PC-relative, | |
6155 | and only PC-relative relocs matter here. However, we | |
6156 | still need to record the opcode for literal | |
6157 | coalescing. */ | |
6158 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6159 | if (opcode == get_l32r_opcode ()) | |
6160 | { | |
6161 | is_abs_literal = TRUE; | |
6162 | opnd = 1; | |
6163 | } | |
6164 | else | |
6165 | opcode = XTENSA_UNDEFINED; | |
6166 | } | |
6167 | else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6168 | { | |
6169 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6170 | opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
6171 | } | |
6172 | ||
6173 | if (opcode != XTENSA_UNDEFINED) | |
6174 | { | |
6175 | int src_next = target_relax_info->src_next++; | |
6176 | source_reloc *s_reloc = &target_relax_info->src_relocs[src_next]; | |
6177 | ||
6178 | init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd, | |
6179 | is_abs_literal); | |
6180 | } | |
6181 | } | |
6182 | } | |
6183 | ||
6184 | /* Now get rid of ASM_EXPAND relocations. At this point, the | |
6185 | src_relocs array for the target literal section may still be | |
6186 | incomplete, but it must at least contain the entries for the L32R | |
6187 | relocations associated with ASM_EXPANDs because they were just | |
6188 | added in the preceding loop over the relocations. */ | |
6189 | ||
6190 | for (i = 0; i < sec->reloc_count; i++) | |
6191 | { | |
6192 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6193 | bfd_boolean is_reachable; | |
6194 | ||
6195 | if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info, | |
6196 | &is_reachable)) | |
6197 | continue; | |
6198 | ||
6199 | if (is_reachable) | |
6200 | { | |
6201 | Elf_Internal_Rela *l32r_irel; | |
6202 | r_reloc r_rel; | |
6203 | asection *target_sec; | |
6204 | xtensa_relax_info *target_relax_info; | |
6205 | ||
6206 | /* Mark the source_reloc for the L32R so that it will be | |
6207 | removed in compute_removed_literals(), along with the | |
6208 | associated literal. */ | |
6209 | l32r_irel = find_associated_l32r_irel (abfd, sec, contents, | |
6210 | irel, internal_relocs); | |
6211 | if (l32r_irel == NULL) | |
6212 | continue; | |
6213 | ||
6214 | r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size); | |
6215 | ||
6216 | target_sec = r_reloc_get_section (&r_rel); | |
6217 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6218 | ||
6219 | if (target_relax_info | |
6220 | && (target_relax_info->is_relaxable_literal_section | |
6221 | || target_relax_info->is_relaxable_asm_section)) | |
6222 | { | |
6223 | source_reloc *s_reloc; | |
6224 | ||
6225 | /* Search the source_relocs for the entry corresponding to | |
6226 | the l32r_irel. Note: The src_relocs array is not yet | |
6227 | sorted, but it wouldn't matter anyway because we're | |
6228 | searching by source offset instead of target offset. */ | |
6229 | s_reloc = find_source_reloc (target_relax_info->src_relocs, | |
6230 | target_relax_info->src_next, | |
6231 | sec, l32r_irel); | |
6232 | BFD_ASSERT (s_reloc); | |
6233 | s_reloc->is_null = TRUE; | |
6234 | } | |
6235 | ||
6236 | /* Convert this reloc to ASM_SIMPLIFY. */ | |
6237 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
6238 | R_XTENSA_ASM_SIMPLIFY); | |
6239 | l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
6240 | ||
6241 | pin_internal_relocs (sec, internal_relocs); | |
6242 | } | |
6243 | else | |
6244 | { | |
6245 | /* It is resolvable but doesn't reach. We resolve now | |
6246 | by eliminating the relocation -- the call will remain | |
6247 | expanded into L32R/CALLX. */ | |
6248 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
6249 | pin_internal_relocs (sec, internal_relocs); | |
6250 | } | |
6251 | } | |
6252 | ||
6253 | error_return: | |
6254 | release_contents (sec, contents); | |
6255 | release_internal_relocs (sec, internal_relocs); | |
6256 | return ok; | |
6257 | } | |
6258 | ||
6259 | ||
6260 | /* Return TRUE if the asm expansion can be resolved. Generally it can | |
6261 | be resolved on a final link or when a partial link locates it in the | |
6262 | same section as the target. Set "is_reachable" flag if the target of | |
6263 | the call is within the range of a direct call, given the current VMA | |
6264 | for this section and the target section. */ | |
6265 | ||
6266 | bfd_boolean | |
7fa3d080 BW |
6267 | is_resolvable_asm_expansion (bfd *abfd, |
6268 | asection *sec, | |
6269 | bfd_byte *contents, | |
6270 | Elf_Internal_Rela *irel, | |
6271 | struct bfd_link_info *link_info, | |
6272 | bfd_boolean *is_reachable_p) | |
43cd72b9 BW |
6273 | { |
6274 | asection *target_sec; | |
6275 | bfd_vma target_offset; | |
6276 | r_reloc r_rel; | |
6277 | xtensa_opcode opcode, direct_call_opcode; | |
6278 | bfd_vma self_address; | |
6279 | bfd_vma dest_address; | |
6280 | bfd_boolean uses_l32r; | |
6281 | bfd_size_type sec_size; | |
6282 | ||
6283 | *is_reachable_p = FALSE; | |
6284 | ||
6285 | if (contents == NULL) | |
6286 | return FALSE; | |
6287 | ||
6288 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND) | |
6289 | return FALSE; | |
6290 | ||
6291 | sec_size = bfd_get_section_limit (abfd, sec); | |
6292 | opcode = get_expanded_call_opcode (contents + irel->r_offset, | |
6293 | sec_size - irel->r_offset, &uses_l32r); | |
6294 | /* Optimization of longcalls that use CONST16 is not yet implemented. */ | |
6295 | if (!uses_l32r) | |
6296 | return FALSE; | |
6297 | ||
6298 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
6299 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
6300 | return FALSE; | |
6301 | ||
6302 | /* Check and see that the target resolves. */ | |
6303 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6304 | if (!r_reloc_is_defined (&r_rel)) | |
6305 | return FALSE; | |
6306 | ||
6307 | target_sec = r_reloc_get_section (&r_rel); | |
6308 | target_offset = r_rel.target_offset; | |
6309 | ||
6310 | /* If the target is in a shared library, then it doesn't reach. This | |
6311 | isn't supposed to come up because the compiler should never generate | |
6312 | non-PIC calls on systems that use shared libraries, but the linker | |
6313 | shouldn't crash regardless. */ | |
6314 | if (!target_sec->output_section) | |
6315 | return FALSE; | |
6316 | ||
6317 | /* For relocatable sections, we can only simplify when the output | |
6318 | section of the target is the same as the output section of the | |
6319 | source. */ | |
6320 | if (link_info->relocatable | |
6321 | && (target_sec->output_section != sec->output_section | |
6322 | || is_reloc_sym_weak (abfd, irel))) | |
6323 | return FALSE; | |
6324 | ||
6325 | self_address = (sec->output_section->vma | |
6326 | + sec->output_offset + irel->r_offset + 3); | |
6327 | dest_address = (target_sec->output_section->vma | |
6328 | + target_sec->output_offset + target_offset); | |
6329 | ||
6330 | *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0, | |
6331 | self_address, dest_address); | |
6332 | ||
6333 | if ((self_address >> CALL_SEGMENT_BITS) != | |
6334 | (dest_address >> CALL_SEGMENT_BITS)) | |
6335 | return FALSE; | |
6336 | ||
6337 | return TRUE; | |
6338 | } | |
6339 | ||
6340 | ||
6341 | static Elf_Internal_Rela * | |
7fa3d080 BW |
6342 | find_associated_l32r_irel (bfd *abfd, |
6343 | asection *sec, | |
6344 | bfd_byte *contents, | |
6345 | Elf_Internal_Rela *other_irel, | |
6346 | Elf_Internal_Rela *internal_relocs) | |
43cd72b9 BW |
6347 | { |
6348 | unsigned i; | |
e0001a05 | 6349 | |
43cd72b9 BW |
6350 | for (i = 0; i < sec->reloc_count; i++) |
6351 | { | |
6352 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
e0001a05 | 6353 | |
43cd72b9 BW |
6354 | if (irel == other_irel) |
6355 | continue; | |
6356 | if (irel->r_offset != other_irel->r_offset) | |
6357 | continue; | |
6358 | if (is_l32r_relocation (abfd, sec, contents, irel)) | |
6359 | return irel; | |
6360 | } | |
6361 | ||
6362 | return NULL; | |
e0001a05 NC |
6363 | } |
6364 | ||
6365 | ||
cb337148 BW |
6366 | static xtensa_opcode * |
6367 | build_reloc_opcodes (bfd *abfd, | |
6368 | asection *sec, | |
6369 | bfd_byte *contents, | |
6370 | Elf_Internal_Rela *internal_relocs) | |
6371 | { | |
6372 | unsigned i; | |
6373 | xtensa_opcode *reloc_opcodes = | |
6374 | (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count); | |
6375 | for (i = 0; i < sec->reloc_count; i++) | |
6376 | { | |
6377 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6378 | reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel); | |
6379 | } | |
6380 | return reloc_opcodes; | |
6381 | } | |
6382 | ||
6383 | ||
43cd72b9 BW |
6384 | /* The compute_text_actions function will build a list of potential |
6385 | transformation actions for code in the extended basic block of each | |
6386 | longcall that is optimized to a direct call. From this list we | |
6387 | generate a set of actions to actually perform that optimizes for | |
6388 | space and, if not using size_opt, maintains branch target | |
6389 | alignments. | |
e0001a05 | 6390 | |
43cd72b9 BW |
6391 | These actions to be performed are placed on a per-section list. |
6392 | The actual changes are performed by relax_section() in the second | |
6393 | pass. */ | |
6394 | ||
6395 | bfd_boolean | |
7fa3d080 BW |
6396 | compute_text_actions (bfd *abfd, |
6397 | asection *sec, | |
6398 | struct bfd_link_info *link_info) | |
e0001a05 | 6399 | { |
cb337148 | 6400 | xtensa_opcode *reloc_opcodes = NULL; |
43cd72b9 | 6401 | xtensa_relax_info *relax_info; |
e0001a05 | 6402 | bfd_byte *contents; |
43cd72b9 | 6403 | Elf_Internal_Rela *internal_relocs; |
e0001a05 NC |
6404 | bfd_boolean ok = TRUE; |
6405 | unsigned i; | |
43cd72b9 BW |
6406 | property_table_entry *prop_table = 0; |
6407 | int ptblsize = 0; | |
6408 | bfd_size_type sec_size; | |
43cd72b9 | 6409 | |
43cd72b9 BW |
6410 | relax_info = get_xtensa_relax_info (sec); |
6411 | BFD_ASSERT (relax_info); | |
25c6282a BW |
6412 | BFD_ASSERT (relax_info->src_next == relax_info->src_count); |
6413 | ||
6414 | /* Do nothing if the section contains no optimized longcalls. */ | |
43cd72b9 BW |
6415 | if (!relax_info->is_relaxable_asm_section) |
6416 | return ok; | |
e0001a05 NC |
6417 | |
6418 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6419 | link_info->keep_memory); | |
e0001a05 | 6420 | |
43cd72b9 BW |
6421 | if (internal_relocs) |
6422 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
6423 | internal_reloc_compare); | |
6424 | ||
6425 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 | 6426 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 6427 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
6428 | { |
6429 | ok = FALSE; | |
6430 | goto error_return; | |
6431 | } | |
6432 | ||
43cd72b9 BW |
6433 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
6434 | XTENSA_PROP_SEC_NAME, FALSE); | |
6435 | if (ptblsize < 0) | |
6436 | { | |
6437 | ok = FALSE; | |
6438 | goto error_return; | |
6439 | } | |
6440 | ||
6441 | for (i = 0; i < sec->reloc_count; i++) | |
e0001a05 NC |
6442 | { |
6443 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 BW |
6444 | bfd_vma r_offset; |
6445 | property_table_entry *the_entry; | |
6446 | int ptbl_idx; | |
6447 | ebb_t *ebb; | |
6448 | ebb_constraint ebb_table; | |
6449 | bfd_size_type simplify_size; | |
6450 | ||
6451 | if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY) | |
6452 | continue; | |
6453 | r_offset = irel->r_offset; | |
e0001a05 | 6454 | |
43cd72b9 BW |
6455 | simplify_size = get_asm_simplify_size (contents, sec_size, r_offset); |
6456 | if (simplify_size == 0) | |
6457 | { | |
6458 | (*_bfd_error_handler) | |
6459 | (_("%B(%A+0x%lx): could not decode instruction for XTENSA_ASM_SIMPLIFY relocation; possible configuration mismatch"), | |
6460 | sec->owner, sec, r_offset); | |
6461 | continue; | |
6462 | } | |
e0001a05 | 6463 | |
43cd72b9 BW |
6464 | /* If the instruction table is not around, then don't do this |
6465 | relaxation. */ | |
6466 | the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
6467 | sec->vma + irel->r_offset); | |
6468 | if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL) | |
6469 | { | |
6470 | text_action_add (&relax_info->action_list, | |
6471 | ta_convert_longcall, sec, r_offset, | |
6472 | 0); | |
6473 | continue; | |
6474 | } | |
6475 | ||
6476 | /* If the next longcall happens to be at the same address as an | |
6477 | unreachable section of size 0, then skip forward. */ | |
6478 | ptbl_idx = the_entry - prop_table; | |
6479 | while ((the_entry->flags & XTENSA_PROP_UNREACHABLE) | |
6480 | && the_entry->size == 0 | |
6481 | && ptbl_idx + 1 < ptblsize | |
6482 | && (prop_table[ptbl_idx + 1].address | |
6483 | == prop_table[ptbl_idx].address)) | |
6484 | { | |
6485 | ptbl_idx++; | |
6486 | the_entry++; | |
6487 | } | |
e0001a05 | 6488 | |
99ded152 | 6489 | if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM) |
43cd72b9 BW |
6490 | /* NO_REORDER is OK */ |
6491 | continue; | |
e0001a05 | 6492 | |
43cd72b9 BW |
6493 | init_ebb_constraint (&ebb_table); |
6494 | ebb = &ebb_table.ebb; | |
6495 | init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize, | |
6496 | internal_relocs, sec->reloc_count); | |
6497 | ebb->start_offset = r_offset + simplify_size; | |
6498 | ebb->end_offset = r_offset + simplify_size; | |
6499 | ebb->start_ptbl_idx = ptbl_idx; | |
6500 | ebb->end_ptbl_idx = ptbl_idx; | |
6501 | ebb->start_reloc_idx = i; | |
6502 | ebb->end_reloc_idx = i; | |
6503 | ||
cb337148 BW |
6504 | /* Precompute the opcode for each relocation. */ |
6505 | if (reloc_opcodes == NULL) | |
6506 | reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, | |
6507 | internal_relocs); | |
6508 | ||
43cd72b9 BW |
6509 | if (!extend_ebb_bounds (ebb) |
6510 | || !compute_ebb_proposed_actions (&ebb_table) | |
6511 | || !compute_ebb_actions (&ebb_table) | |
6512 | || !check_section_ebb_pcrels_fit (abfd, sec, contents, | |
cb337148 BW |
6513 | internal_relocs, &ebb_table, |
6514 | reloc_opcodes) | |
43cd72b9 | 6515 | || !check_section_ebb_reduces (&ebb_table)) |
e0001a05 | 6516 | { |
43cd72b9 BW |
6517 | /* If anything goes wrong or we get unlucky and something does |
6518 | not fit, with our plan because of expansion between | |
6519 | critical branches, just convert to a NOP. */ | |
6520 | ||
6521 | text_action_add (&relax_info->action_list, | |
6522 | ta_convert_longcall, sec, r_offset, 0); | |
6523 | i = ebb_table.ebb.end_reloc_idx; | |
6524 | free_ebb_constraint (&ebb_table); | |
6525 | continue; | |
e0001a05 | 6526 | } |
43cd72b9 BW |
6527 | |
6528 | text_action_add_proposed (&relax_info->action_list, &ebb_table, sec); | |
6529 | ||
6530 | /* Update the index so we do not go looking at the relocations | |
6531 | we have already processed. */ | |
6532 | i = ebb_table.ebb.end_reloc_idx; | |
6533 | free_ebb_constraint (&ebb_table); | |
e0001a05 NC |
6534 | } |
6535 | ||
43cd72b9 | 6536 | #if DEBUG |
7fa3d080 | 6537 | if (relax_info->action_list.head) |
43cd72b9 BW |
6538 | print_action_list (stderr, &relax_info->action_list); |
6539 | #endif | |
6540 | ||
6541 | error_return: | |
e0001a05 NC |
6542 | release_contents (sec, contents); |
6543 | release_internal_relocs (sec, internal_relocs); | |
43cd72b9 BW |
6544 | if (prop_table) |
6545 | free (prop_table); | |
cb337148 BW |
6546 | if (reloc_opcodes) |
6547 | free (reloc_opcodes); | |
43cd72b9 | 6548 | |
e0001a05 NC |
6549 | return ok; |
6550 | } | |
6551 | ||
6552 | ||
64b607e6 BW |
6553 | /* Do not widen an instruction if it is preceeded by a |
6554 | loop opcode. It might cause misalignment. */ | |
6555 | ||
6556 | static bfd_boolean | |
6557 | prev_instr_is_a_loop (bfd_byte *contents, | |
6558 | bfd_size_type content_length, | |
6559 | bfd_size_type offset) | |
6560 | { | |
6561 | xtensa_opcode prev_opcode; | |
6562 | ||
6563 | if (offset < 3) | |
6564 | return FALSE; | |
6565 | prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0); | |
6566 | return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1); | |
6567 | } | |
6568 | ||
6569 | ||
43cd72b9 | 6570 | /* Find all of the possible actions for an extended basic block. */ |
e0001a05 | 6571 | |
43cd72b9 | 6572 | bfd_boolean |
7fa3d080 | 6573 | compute_ebb_proposed_actions (ebb_constraint *ebb_table) |
e0001a05 | 6574 | { |
43cd72b9 BW |
6575 | const ebb_t *ebb = &ebb_table->ebb; |
6576 | unsigned rel_idx = ebb->start_reloc_idx; | |
6577 | property_table_entry *entry, *start_entry, *end_entry; | |
64b607e6 BW |
6578 | bfd_vma offset = 0; |
6579 | xtensa_isa isa = xtensa_default_isa; | |
6580 | xtensa_format fmt; | |
6581 | static xtensa_insnbuf insnbuf = NULL; | |
6582 | static xtensa_insnbuf slotbuf = NULL; | |
6583 | ||
6584 | if (insnbuf == NULL) | |
6585 | { | |
6586 | insnbuf = xtensa_insnbuf_alloc (isa); | |
6587 | slotbuf = xtensa_insnbuf_alloc (isa); | |
6588 | } | |
e0001a05 | 6589 | |
43cd72b9 BW |
6590 | start_entry = &ebb->ptbl[ebb->start_ptbl_idx]; |
6591 | end_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
e0001a05 | 6592 | |
43cd72b9 | 6593 | for (entry = start_entry; entry <= end_entry; entry++) |
e0001a05 | 6594 | { |
64b607e6 | 6595 | bfd_vma start_offset, end_offset; |
43cd72b9 | 6596 | bfd_size_type insn_len; |
e0001a05 | 6597 | |
43cd72b9 BW |
6598 | start_offset = entry->address - ebb->sec->vma; |
6599 | end_offset = entry->address + entry->size - ebb->sec->vma; | |
e0001a05 | 6600 | |
43cd72b9 BW |
6601 | if (entry == start_entry) |
6602 | start_offset = ebb->start_offset; | |
6603 | if (entry == end_entry) | |
6604 | end_offset = ebb->end_offset; | |
6605 | offset = start_offset; | |
e0001a05 | 6606 | |
43cd72b9 BW |
6607 | if (offset == entry->address - ebb->sec->vma |
6608 | && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0) | |
6609 | { | |
6610 | enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN; | |
6611 | BFD_ASSERT (offset != end_offset); | |
6612 | if (offset == end_offset) | |
6613 | return FALSE; | |
e0001a05 | 6614 | |
43cd72b9 BW |
6615 | insn_len = insn_decode_len (ebb->contents, ebb->content_length, |
6616 | offset); | |
43cd72b9 | 6617 | if (insn_len == 0) |
64b607e6 BW |
6618 | goto decode_error; |
6619 | ||
43cd72b9 BW |
6620 | if (check_branch_target_aligned_address (offset, insn_len)) |
6621 | align_type = EBB_REQUIRE_TGT_ALIGN; | |
6622 | ||
6623 | ebb_propose_action (ebb_table, align_type, 0, | |
6624 | ta_none, offset, 0, TRUE); | |
6625 | } | |
6626 | ||
6627 | while (offset != end_offset) | |
e0001a05 | 6628 | { |
43cd72b9 | 6629 | Elf_Internal_Rela *irel; |
e0001a05 | 6630 | xtensa_opcode opcode; |
e0001a05 | 6631 | |
43cd72b9 BW |
6632 | while (rel_idx < ebb->end_reloc_idx |
6633 | && (ebb->relocs[rel_idx].r_offset < offset | |
6634 | || (ebb->relocs[rel_idx].r_offset == offset | |
6635 | && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info) | |
6636 | != R_XTENSA_ASM_SIMPLIFY)))) | |
6637 | rel_idx++; | |
6638 | ||
6639 | /* Check for longcall. */ | |
6640 | irel = &ebb->relocs[rel_idx]; | |
6641 | if (irel->r_offset == offset | |
6642 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY) | |
6643 | { | |
6644 | bfd_size_type simplify_size; | |
e0001a05 | 6645 | |
43cd72b9 BW |
6646 | simplify_size = get_asm_simplify_size (ebb->contents, |
6647 | ebb->content_length, | |
6648 | irel->r_offset); | |
6649 | if (simplify_size == 0) | |
64b607e6 | 6650 | goto decode_error; |
43cd72b9 BW |
6651 | |
6652 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6653 | ta_convert_longcall, offset, 0, TRUE); | |
6654 | ||
6655 | offset += simplify_size; | |
6656 | continue; | |
6657 | } | |
e0001a05 | 6658 | |
64b607e6 BW |
6659 | if (offset + MIN_INSN_LENGTH > ebb->content_length) |
6660 | goto decode_error; | |
6661 | xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset], | |
6662 | ebb->content_length - offset); | |
6663 | fmt = xtensa_format_decode (isa, insnbuf); | |
6664 | if (fmt == XTENSA_UNDEFINED) | |
6665 | goto decode_error; | |
6666 | insn_len = xtensa_format_length (isa, fmt); | |
6667 | if (insn_len == (bfd_size_type) XTENSA_UNDEFINED) | |
6668 | goto decode_error; | |
6669 | ||
6670 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
43cd72b9 | 6671 | { |
64b607e6 BW |
6672 | offset += insn_len; |
6673 | continue; | |
43cd72b9 | 6674 | } |
64b607e6 BW |
6675 | |
6676 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
6677 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
6678 | if (opcode == XTENSA_UNDEFINED) | |
6679 | goto decode_error; | |
6680 | ||
43cd72b9 | 6681 | if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0 |
99ded152 | 6682 | && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 | 6683 | && can_narrow_instruction (slotbuf, fmt, opcode) != 0) |
43cd72b9 BW |
6684 | { |
6685 | /* Add an instruction narrow action. */ | |
6686 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6687 | ta_narrow_insn, offset, 0, FALSE); | |
43cd72b9 | 6688 | } |
99ded152 | 6689 | else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 BW |
6690 | && can_widen_instruction (slotbuf, fmt, opcode) != 0 |
6691 | && ! prev_instr_is_a_loop (ebb->contents, | |
6692 | ebb->content_length, offset)) | |
43cd72b9 BW |
6693 | { |
6694 | /* Add an instruction widen action. */ | |
6695 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6696 | ta_widen_insn, offset, 0, FALSE); | |
43cd72b9 | 6697 | } |
64b607e6 | 6698 | else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1) |
43cd72b9 BW |
6699 | { |
6700 | /* Check for branch targets. */ | |
6701 | ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0, | |
6702 | ta_none, offset, 0, TRUE); | |
43cd72b9 BW |
6703 | } |
6704 | ||
6705 | offset += insn_len; | |
e0001a05 NC |
6706 | } |
6707 | } | |
6708 | ||
43cd72b9 BW |
6709 | if (ebb->ends_unreachable) |
6710 | { | |
6711 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6712 | ta_fill, ebb->end_offset, 0, TRUE); | |
6713 | } | |
e0001a05 | 6714 | |
43cd72b9 | 6715 | return TRUE; |
64b607e6 BW |
6716 | |
6717 | decode_error: | |
6718 | (*_bfd_error_handler) | |
6719 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6720 | ebb->sec->owner, ebb->sec, offset); | |
6721 | return FALSE; | |
43cd72b9 BW |
6722 | } |
6723 | ||
6724 | ||
6725 | /* After all of the information has collected about the | |
6726 | transformations possible in an EBB, compute the appropriate actions | |
6727 | here in compute_ebb_actions. We still must check later to make | |
6728 | sure that the actions do not break any relocations. The algorithm | |
6729 | used here is pretty greedy. Basically, it removes as many no-ops | |
6730 | as possible so that the end of the EBB has the same alignment | |
6731 | characteristics as the original. First, it uses narrowing, then | |
6732 | fill space at the end of the EBB, and finally widenings. If that | |
6733 | does not work, it tries again with one fewer no-op removed. The | |
6734 | optimization will only be performed if all of the branch targets | |
6735 | that were aligned before transformation are also aligned after the | |
6736 | transformation. | |
6737 | ||
6738 | When the size_opt flag is set, ignore the branch target alignments, | |
6739 | narrow all wide instructions, and remove all no-ops unless the end | |
6740 | of the EBB prevents it. */ | |
6741 | ||
6742 | bfd_boolean | |
7fa3d080 | 6743 | compute_ebb_actions (ebb_constraint *ebb_table) |
43cd72b9 BW |
6744 | { |
6745 | unsigned i = 0; | |
6746 | unsigned j; | |
6747 | int removed_bytes = 0; | |
6748 | ebb_t *ebb = &ebb_table->ebb; | |
6749 | unsigned seg_idx_start = 0; | |
6750 | unsigned seg_idx_end = 0; | |
6751 | ||
6752 | /* We perform this like the assembler relaxation algorithm: Start by | |
6753 | assuming all instructions are narrow and all no-ops removed; then | |
6754 | walk through.... */ | |
6755 | ||
6756 | /* For each segment of this that has a solid constraint, check to | |
6757 | see if there are any combinations that will keep the constraint. | |
6758 | If so, use it. */ | |
6759 | for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++) | |
e0001a05 | 6760 | { |
43cd72b9 BW |
6761 | bfd_boolean requires_text_end_align = FALSE; |
6762 | unsigned longcall_count = 0; | |
6763 | unsigned longcall_convert_count = 0; | |
6764 | unsigned narrowable_count = 0; | |
6765 | unsigned narrowable_convert_count = 0; | |
6766 | unsigned widenable_count = 0; | |
6767 | unsigned widenable_convert_count = 0; | |
e0001a05 | 6768 | |
43cd72b9 BW |
6769 | proposed_action *action = NULL; |
6770 | int align = (1 << ebb_table->ebb.sec->alignment_power); | |
e0001a05 | 6771 | |
43cd72b9 | 6772 | seg_idx_start = seg_idx_end; |
e0001a05 | 6773 | |
43cd72b9 BW |
6774 | for (i = seg_idx_start; i < ebb_table->action_count; i++) |
6775 | { | |
6776 | action = &ebb_table->actions[i]; | |
6777 | if (action->action == ta_convert_longcall) | |
6778 | longcall_count++; | |
6779 | if (action->action == ta_narrow_insn) | |
6780 | narrowable_count++; | |
6781 | if (action->action == ta_widen_insn) | |
6782 | widenable_count++; | |
6783 | if (action->action == ta_fill) | |
6784 | break; | |
6785 | if (action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
6786 | break; | |
6787 | if (action->align_type == EBB_REQUIRE_TGT_ALIGN | |
6788 | && !elf32xtensa_size_opt) | |
6789 | break; | |
6790 | } | |
6791 | seg_idx_end = i; | |
e0001a05 | 6792 | |
43cd72b9 BW |
6793 | if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable) |
6794 | requires_text_end_align = TRUE; | |
e0001a05 | 6795 | |
43cd72b9 BW |
6796 | if (elf32xtensa_size_opt && !requires_text_end_align |
6797 | && action->align_type != EBB_REQUIRE_LOOP_ALIGN | |
6798 | && action->align_type != EBB_REQUIRE_TGT_ALIGN) | |
6799 | { | |
6800 | longcall_convert_count = longcall_count; | |
6801 | narrowable_convert_count = narrowable_count; | |
6802 | widenable_convert_count = 0; | |
6803 | } | |
6804 | else | |
6805 | { | |
6806 | /* There is a constraint. Convert the max number of longcalls. */ | |
6807 | narrowable_convert_count = 0; | |
6808 | longcall_convert_count = 0; | |
6809 | widenable_convert_count = 0; | |
e0001a05 | 6810 | |
43cd72b9 | 6811 | for (j = 0; j < longcall_count; j++) |
e0001a05 | 6812 | { |
43cd72b9 BW |
6813 | int removed = (longcall_count - j) * 3 & (align - 1); |
6814 | unsigned desire_narrow = (align - removed) & (align - 1); | |
6815 | unsigned desire_widen = removed; | |
6816 | if (desire_narrow <= narrowable_count) | |
6817 | { | |
6818 | narrowable_convert_count = desire_narrow; | |
6819 | narrowable_convert_count += | |
6820 | (align * ((narrowable_count - narrowable_convert_count) | |
6821 | / align)); | |
6822 | longcall_convert_count = (longcall_count - j); | |
6823 | widenable_convert_count = 0; | |
6824 | break; | |
6825 | } | |
6826 | if (desire_widen <= widenable_count && !elf32xtensa_size_opt) | |
6827 | { | |
6828 | narrowable_convert_count = 0; | |
6829 | longcall_convert_count = longcall_count - j; | |
6830 | widenable_convert_count = desire_widen; | |
6831 | break; | |
6832 | } | |
6833 | } | |
6834 | } | |
e0001a05 | 6835 | |
43cd72b9 BW |
6836 | /* Now the number of conversions are saved. Do them. */ |
6837 | for (i = seg_idx_start; i < seg_idx_end; i++) | |
6838 | { | |
6839 | action = &ebb_table->actions[i]; | |
6840 | switch (action->action) | |
6841 | { | |
6842 | case ta_convert_longcall: | |
6843 | if (longcall_convert_count != 0) | |
6844 | { | |
6845 | action->action = ta_remove_longcall; | |
6846 | action->do_action = TRUE; | |
6847 | action->removed_bytes += 3; | |
6848 | longcall_convert_count--; | |
6849 | } | |
6850 | break; | |
6851 | case ta_narrow_insn: | |
6852 | if (narrowable_convert_count != 0) | |
6853 | { | |
6854 | action->do_action = TRUE; | |
6855 | action->removed_bytes += 1; | |
6856 | narrowable_convert_count--; | |
6857 | } | |
6858 | break; | |
6859 | case ta_widen_insn: | |
6860 | if (widenable_convert_count != 0) | |
6861 | { | |
6862 | action->do_action = TRUE; | |
6863 | action->removed_bytes -= 1; | |
6864 | widenable_convert_count--; | |
6865 | } | |
6866 | break; | |
6867 | default: | |
6868 | break; | |
e0001a05 | 6869 | } |
43cd72b9 BW |
6870 | } |
6871 | } | |
e0001a05 | 6872 | |
43cd72b9 BW |
6873 | /* Now we move on to some local opts. Try to remove each of the |
6874 | remaining longcalls. */ | |
e0001a05 | 6875 | |
43cd72b9 BW |
6876 | if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable) |
6877 | { | |
6878 | removed_bytes = 0; | |
6879 | for (i = 0; i < ebb_table->action_count; i++) | |
e0001a05 | 6880 | { |
43cd72b9 BW |
6881 | int old_removed_bytes = removed_bytes; |
6882 | proposed_action *action = &ebb_table->actions[i]; | |
6883 | ||
6884 | if (action->do_action && action->action == ta_convert_longcall) | |
6885 | { | |
6886 | bfd_boolean bad_alignment = FALSE; | |
6887 | removed_bytes += 3; | |
6888 | for (j = i + 1; j < ebb_table->action_count; j++) | |
6889 | { | |
6890 | proposed_action *new_action = &ebb_table->actions[j]; | |
6891 | bfd_vma offset = new_action->offset; | |
6892 | if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN) | |
6893 | { | |
6894 | if (!check_branch_target_aligned | |
6895 | (ebb_table->ebb.contents, | |
6896 | ebb_table->ebb.content_length, | |
6897 | offset, offset - removed_bytes)) | |
6898 | { | |
6899 | bad_alignment = TRUE; | |
6900 | break; | |
6901 | } | |
6902 | } | |
6903 | if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
6904 | { | |
6905 | if (!check_loop_aligned (ebb_table->ebb.contents, | |
6906 | ebb_table->ebb.content_length, | |
6907 | offset, | |
6908 | offset - removed_bytes)) | |
6909 | { | |
6910 | bad_alignment = TRUE; | |
6911 | break; | |
6912 | } | |
6913 | } | |
6914 | if (new_action->action == ta_narrow_insn | |
6915 | && !new_action->do_action | |
6916 | && ebb_table->ebb.sec->alignment_power == 2) | |
6917 | { | |
6918 | /* Narrow an instruction and we are done. */ | |
6919 | new_action->do_action = TRUE; | |
6920 | new_action->removed_bytes += 1; | |
6921 | bad_alignment = FALSE; | |
6922 | break; | |
6923 | } | |
6924 | if (new_action->action == ta_widen_insn | |
6925 | && new_action->do_action | |
6926 | && ebb_table->ebb.sec->alignment_power == 2) | |
6927 | { | |
6928 | /* Narrow an instruction and we are done. */ | |
6929 | new_action->do_action = FALSE; | |
6930 | new_action->removed_bytes += 1; | |
6931 | bad_alignment = FALSE; | |
6932 | break; | |
6933 | } | |
5c5d6806 BW |
6934 | if (new_action->do_action) |
6935 | removed_bytes += new_action->removed_bytes; | |
43cd72b9 BW |
6936 | } |
6937 | if (!bad_alignment) | |
6938 | { | |
6939 | action->removed_bytes += 3; | |
6940 | action->action = ta_remove_longcall; | |
6941 | action->do_action = TRUE; | |
6942 | } | |
6943 | } | |
6944 | removed_bytes = old_removed_bytes; | |
6945 | if (action->do_action) | |
6946 | removed_bytes += action->removed_bytes; | |
e0001a05 NC |
6947 | } |
6948 | } | |
6949 | ||
43cd72b9 BW |
6950 | removed_bytes = 0; |
6951 | for (i = 0; i < ebb_table->action_count; ++i) | |
6952 | { | |
6953 | proposed_action *action = &ebb_table->actions[i]; | |
6954 | if (action->do_action) | |
6955 | removed_bytes += action->removed_bytes; | |
6956 | } | |
6957 | ||
6958 | if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0 | |
6959 | && ebb->ends_unreachable) | |
6960 | { | |
6961 | proposed_action *action; | |
6962 | int br; | |
6963 | int extra_space; | |
6964 | ||
6965 | BFD_ASSERT (ebb_table->action_count != 0); | |
6966 | action = &ebb_table->actions[ebb_table->action_count - 1]; | |
6967 | BFD_ASSERT (action->action == ta_fill); | |
6968 | BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE); | |
6969 | ||
6970 | extra_space = compute_fill_extra_space (ebb->ends_unreachable); | |
6971 | br = action->removed_bytes + removed_bytes + extra_space; | |
6972 | br = br & ((1 << ebb->sec->alignment_power ) - 1); | |
6973 | ||
6974 | action->removed_bytes = extra_space - br; | |
6975 | } | |
6976 | return TRUE; | |
e0001a05 NC |
6977 | } |
6978 | ||
6979 | ||
03e94c08 BW |
6980 | /* The xlate_map is a sorted array of address mappings designed to |
6981 | answer the offset_with_removed_text() query with a binary search instead | |
6982 | of a linear search through the section's action_list. */ | |
6983 | ||
6984 | typedef struct xlate_map_entry xlate_map_entry_t; | |
6985 | typedef struct xlate_map xlate_map_t; | |
6986 | ||
6987 | struct xlate_map_entry | |
6988 | { | |
6989 | unsigned orig_address; | |
6990 | unsigned new_address; | |
6991 | unsigned size; | |
6992 | }; | |
6993 | ||
6994 | struct xlate_map | |
6995 | { | |
6996 | unsigned entry_count; | |
6997 | xlate_map_entry_t *entry; | |
6998 | }; | |
6999 | ||
7000 | ||
7001 | static int | |
7002 | xlate_compare (const void *a_v, const void *b_v) | |
7003 | { | |
7004 | const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v; | |
7005 | const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v; | |
7006 | if (a->orig_address < b->orig_address) | |
7007 | return -1; | |
7008 | if (a->orig_address > (b->orig_address + b->size - 1)) | |
7009 | return 1; | |
7010 | return 0; | |
7011 | } | |
7012 | ||
7013 | ||
7014 | static bfd_vma | |
7015 | xlate_offset_with_removed_text (const xlate_map_t *map, | |
7016 | text_action_list *action_list, | |
7017 | bfd_vma offset) | |
7018 | { | |
7019 | xlate_map_entry_t tmp; | |
7020 | void *r; | |
7021 | xlate_map_entry_t *e; | |
7022 | ||
7023 | if (map == NULL) | |
7024 | return offset_with_removed_text (action_list, offset); | |
7025 | ||
7026 | if (map->entry_count == 0) | |
7027 | return offset; | |
7028 | ||
7029 | tmp.orig_address = offset; | |
7030 | tmp.new_address = offset; | |
7031 | tmp.size = 1; | |
7032 | ||
7033 | r = bsearch (&offset, map->entry, map->entry_count, | |
7034 | sizeof (xlate_map_entry_t), &xlate_compare); | |
7035 | e = (xlate_map_entry_t *) r; | |
7036 | ||
7037 | BFD_ASSERT (e != NULL); | |
7038 | if (e == NULL) | |
7039 | return offset; | |
7040 | return e->new_address - e->orig_address + offset; | |
7041 | } | |
7042 | ||
7043 | ||
7044 | /* Build a binary searchable offset translation map from a section's | |
7045 | action list. */ | |
7046 | ||
7047 | static xlate_map_t * | |
7048 | build_xlate_map (asection *sec, xtensa_relax_info *relax_info) | |
7049 | { | |
7050 | xlate_map_t *map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t)); | |
7051 | text_action_list *action_list = &relax_info->action_list; | |
7052 | unsigned num_actions = 0; | |
7053 | text_action *r; | |
7054 | int removed; | |
7055 | xlate_map_entry_t *current_entry; | |
7056 | ||
7057 | if (map == NULL) | |
7058 | return NULL; | |
7059 | ||
7060 | num_actions = action_list_count (action_list); | |
7061 | map->entry = (xlate_map_entry_t *) | |
7062 | bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1)); | |
7063 | if (map->entry == NULL) | |
7064 | { | |
7065 | free (map); | |
7066 | return NULL; | |
7067 | } | |
7068 | map->entry_count = 0; | |
7069 | ||
7070 | removed = 0; | |
7071 | current_entry = &map->entry[0]; | |
7072 | ||
7073 | current_entry->orig_address = 0; | |
7074 | current_entry->new_address = 0; | |
7075 | current_entry->size = 0; | |
7076 | ||
7077 | for (r = action_list->head; r != NULL; r = r->next) | |
7078 | { | |
7079 | unsigned orig_size = 0; | |
7080 | switch (r->action) | |
7081 | { | |
7082 | case ta_none: | |
7083 | case ta_remove_insn: | |
7084 | case ta_convert_longcall: | |
7085 | case ta_remove_literal: | |
7086 | case ta_add_literal: | |
7087 | break; | |
7088 | case ta_remove_longcall: | |
7089 | orig_size = 6; | |
7090 | break; | |
7091 | case ta_narrow_insn: | |
7092 | orig_size = 3; | |
7093 | break; | |
7094 | case ta_widen_insn: | |
7095 | orig_size = 2; | |
7096 | break; | |
7097 | case ta_fill: | |
7098 | break; | |
7099 | } | |
7100 | current_entry->size = | |
7101 | r->offset + orig_size - current_entry->orig_address; | |
7102 | if (current_entry->size != 0) | |
7103 | { | |
7104 | current_entry++; | |
7105 | map->entry_count++; | |
7106 | } | |
7107 | current_entry->orig_address = r->offset + orig_size; | |
7108 | removed += r->removed_bytes; | |
7109 | current_entry->new_address = r->offset + orig_size - removed; | |
7110 | current_entry->size = 0; | |
7111 | } | |
7112 | ||
7113 | current_entry->size = (bfd_get_section_limit (sec->owner, sec) | |
7114 | - current_entry->orig_address); | |
7115 | if (current_entry->size != 0) | |
7116 | map->entry_count++; | |
7117 | ||
7118 | return map; | |
7119 | } | |
7120 | ||
7121 | ||
7122 | /* Free an offset translation map. */ | |
7123 | ||
7124 | static void | |
7125 | free_xlate_map (xlate_map_t *map) | |
7126 | { | |
7127 | if (map && map->entry) | |
7128 | free (map->entry); | |
7129 | if (map) | |
7130 | free (map); | |
7131 | } | |
7132 | ||
7133 | ||
43cd72b9 BW |
7134 | /* Use check_section_ebb_pcrels_fit to make sure that all of the |
7135 | relocations in a section will fit if a proposed set of actions | |
7136 | are performed. */ | |
e0001a05 | 7137 | |
43cd72b9 | 7138 | static bfd_boolean |
7fa3d080 BW |
7139 | check_section_ebb_pcrels_fit (bfd *abfd, |
7140 | asection *sec, | |
7141 | bfd_byte *contents, | |
7142 | Elf_Internal_Rela *internal_relocs, | |
cb337148 BW |
7143 | const ebb_constraint *constraint, |
7144 | const xtensa_opcode *reloc_opcodes) | |
e0001a05 | 7145 | { |
43cd72b9 BW |
7146 | unsigned i, j; |
7147 | Elf_Internal_Rela *irel; | |
03e94c08 BW |
7148 | xlate_map_t *xmap = NULL; |
7149 | bfd_boolean ok = TRUE; | |
43cd72b9 | 7150 | xtensa_relax_info *relax_info; |
e0001a05 | 7151 | |
43cd72b9 | 7152 | relax_info = get_xtensa_relax_info (sec); |
e0001a05 | 7153 | |
03e94c08 BW |
7154 | if (relax_info && sec->reloc_count > 100) |
7155 | { | |
7156 | xmap = build_xlate_map (sec, relax_info); | |
7157 | /* NULL indicates out of memory, but the slow version | |
7158 | can still be used. */ | |
7159 | } | |
7160 | ||
43cd72b9 BW |
7161 | for (i = 0; i < sec->reloc_count; i++) |
7162 | { | |
7163 | r_reloc r_rel; | |
7164 | bfd_vma orig_self_offset, orig_target_offset; | |
7165 | bfd_vma self_offset, target_offset; | |
7166 | int r_type; | |
7167 | reloc_howto_type *howto; | |
7168 | int self_removed_bytes, target_removed_bytes; | |
e0001a05 | 7169 | |
43cd72b9 BW |
7170 | irel = &internal_relocs[i]; |
7171 | r_type = ELF32_R_TYPE (irel->r_info); | |
e0001a05 | 7172 | |
43cd72b9 BW |
7173 | howto = &elf_howto_table[r_type]; |
7174 | /* We maintain the required invariant: PC-relative relocations | |
7175 | that fit before linking must fit after linking. Thus we only | |
7176 | need to deal with relocations to the same section that are | |
7177 | PC-relative. */ | |
7178 | if (ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY | |
7179 | || !howto->pc_relative) | |
7180 | continue; | |
e0001a05 | 7181 | |
43cd72b9 BW |
7182 | r_reloc_init (&r_rel, abfd, irel, contents, |
7183 | bfd_get_section_limit (abfd, sec)); | |
e0001a05 | 7184 | |
43cd72b9 BW |
7185 | if (r_reloc_get_section (&r_rel) != sec) |
7186 | continue; | |
e0001a05 | 7187 | |
43cd72b9 BW |
7188 | orig_self_offset = irel->r_offset; |
7189 | orig_target_offset = r_rel.target_offset; | |
e0001a05 | 7190 | |
43cd72b9 BW |
7191 | self_offset = orig_self_offset; |
7192 | target_offset = orig_target_offset; | |
7193 | ||
7194 | if (relax_info) | |
7195 | { | |
03e94c08 BW |
7196 | self_offset = |
7197 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7198 | orig_self_offset); | |
7199 | target_offset = | |
7200 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7201 | orig_target_offset); | |
43cd72b9 BW |
7202 | } |
7203 | ||
7204 | self_removed_bytes = 0; | |
7205 | target_removed_bytes = 0; | |
7206 | ||
7207 | for (j = 0; j < constraint->action_count; ++j) | |
7208 | { | |
7209 | proposed_action *action = &constraint->actions[j]; | |
7210 | bfd_vma offset = action->offset; | |
7211 | int removed_bytes = action->removed_bytes; | |
7212 | if (offset < orig_self_offset | |
7213 | || (offset == orig_self_offset && action->action == ta_fill | |
7214 | && action->removed_bytes < 0)) | |
7215 | self_removed_bytes += removed_bytes; | |
7216 | if (offset < orig_target_offset | |
7217 | || (offset == orig_target_offset && action->action == ta_fill | |
7218 | && action->removed_bytes < 0)) | |
7219 | target_removed_bytes += removed_bytes; | |
7220 | } | |
7221 | self_offset -= self_removed_bytes; | |
7222 | target_offset -= target_removed_bytes; | |
7223 | ||
7224 | /* Try to encode it. Get the operand and check. */ | |
7225 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
7226 | { | |
7227 | /* None of the current alternate relocs are PC-relative, | |
7228 | and only PC-relative relocs matter here. */ | |
7229 | } | |
7230 | else | |
7231 | { | |
7232 | xtensa_opcode opcode; | |
7233 | int opnum; | |
7234 | ||
cb337148 BW |
7235 | if (reloc_opcodes) |
7236 | opcode = reloc_opcodes[i]; | |
7237 | else | |
7238 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
43cd72b9 | 7239 | if (opcode == XTENSA_UNDEFINED) |
03e94c08 BW |
7240 | { |
7241 | ok = FALSE; | |
7242 | break; | |
7243 | } | |
43cd72b9 BW |
7244 | |
7245 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
7246 | if (opnum == XTENSA_UNDEFINED) | |
03e94c08 BW |
7247 | { |
7248 | ok = FALSE; | |
7249 | break; | |
7250 | } | |
43cd72b9 BW |
7251 | |
7252 | if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset)) | |
03e94c08 BW |
7253 | { |
7254 | ok = FALSE; | |
7255 | break; | |
7256 | } | |
43cd72b9 BW |
7257 | } |
7258 | } | |
7259 | ||
03e94c08 BW |
7260 | if (xmap) |
7261 | free_xlate_map (xmap); | |
7262 | ||
7263 | return ok; | |
43cd72b9 BW |
7264 | } |
7265 | ||
7266 | ||
7267 | static bfd_boolean | |
7fa3d080 | 7268 | check_section_ebb_reduces (const ebb_constraint *constraint) |
43cd72b9 BW |
7269 | { |
7270 | int removed = 0; | |
7271 | unsigned i; | |
7272 | ||
7273 | for (i = 0; i < constraint->action_count; i++) | |
7274 | { | |
7275 | const proposed_action *action = &constraint->actions[i]; | |
7276 | if (action->do_action) | |
7277 | removed += action->removed_bytes; | |
7278 | } | |
7279 | if (removed < 0) | |
e0001a05 NC |
7280 | return FALSE; |
7281 | ||
7282 | return TRUE; | |
7283 | } | |
7284 | ||
7285 | ||
43cd72b9 | 7286 | void |
7fa3d080 BW |
7287 | text_action_add_proposed (text_action_list *l, |
7288 | const ebb_constraint *ebb_table, | |
7289 | asection *sec) | |
e0001a05 NC |
7290 | { |
7291 | unsigned i; | |
7292 | ||
43cd72b9 | 7293 | for (i = 0; i < ebb_table->action_count; i++) |
e0001a05 | 7294 | { |
43cd72b9 | 7295 | proposed_action *action = &ebb_table->actions[i]; |
e0001a05 | 7296 | |
43cd72b9 | 7297 | if (!action->do_action) |
e0001a05 | 7298 | continue; |
43cd72b9 BW |
7299 | switch (action->action) |
7300 | { | |
7301 | case ta_remove_insn: | |
7302 | case ta_remove_longcall: | |
7303 | case ta_convert_longcall: | |
7304 | case ta_narrow_insn: | |
7305 | case ta_widen_insn: | |
7306 | case ta_fill: | |
7307 | case ta_remove_literal: | |
7308 | text_action_add (l, action->action, sec, action->offset, | |
7309 | action->removed_bytes); | |
7310 | break; | |
7311 | case ta_none: | |
7312 | break; | |
7313 | default: | |
7314 | BFD_ASSERT (0); | |
7315 | break; | |
7316 | } | |
e0001a05 | 7317 | } |
43cd72b9 | 7318 | } |
e0001a05 | 7319 | |
43cd72b9 BW |
7320 | |
7321 | int | |
7fa3d080 | 7322 | compute_fill_extra_space (property_table_entry *entry) |
43cd72b9 BW |
7323 | { |
7324 | int fill_extra_space; | |
7325 | ||
7326 | if (!entry) | |
7327 | return 0; | |
7328 | ||
7329 | if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0) | |
7330 | return 0; | |
7331 | ||
7332 | fill_extra_space = entry->size; | |
7333 | if ((entry->flags & XTENSA_PROP_ALIGN) != 0) | |
7334 | { | |
7335 | /* Fill bytes for alignment: | |
7336 | (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */ | |
7337 | int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags); | |
7338 | int nsm = (1 << pow) - 1; | |
7339 | bfd_vma addr = entry->address + entry->size; | |
7340 | bfd_vma align_fill = nsm - ((addr + nsm) & nsm); | |
7341 | fill_extra_space += align_fill; | |
7342 | } | |
7343 | return fill_extra_space; | |
e0001a05 NC |
7344 | } |
7345 | ||
43cd72b9 | 7346 | \f |
e0001a05 NC |
7347 | /* First relaxation pass. */ |
7348 | ||
43cd72b9 BW |
7349 | /* If the section contains relaxable literals, check each literal to |
7350 | see if it has the same value as another literal that has already | |
7351 | been seen, either in the current section or a previous one. If so, | |
7352 | add an entry to the per-section list of removed literals. The | |
e0001a05 NC |
7353 | actual changes are deferred until the next pass. */ |
7354 | ||
7355 | static bfd_boolean | |
7fa3d080 BW |
7356 | compute_removed_literals (bfd *abfd, |
7357 | asection *sec, | |
7358 | struct bfd_link_info *link_info, | |
7359 | value_map_hash_table *values) | |
e0001a05 NC |
7360 | { |
7361 | xtensa_relax_info *relax_info; | |
7362 | bfd_byte *contents; | |
7363 | Elf_Internal_Rela *internal_relocs; | |
43cd72b9 | 7364 | source_reloc *src_relocs, *rel; |
e0001a05 | 7365 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
7366 | property_table_entry *prop_table = NULL; |
7367 | int ptblsize; | |
7368 | int i, prev_i; | |
7369 | bfd_boolean last_loc_is_prev = FALSE; | |
7370 | bfd_vma last_target_offset = 0; | |
7371 | section_cache_t target_sec_cache; | |
7372 | bfd_size_type sec_size; | |
7373 | ||
7374 | init_section_cache (&target_sec_cache); | |
e0001a05 NC |
7375 | |
7376 | /* Do nothing if it is not a relaxable literal section. */ | |
7377 | relax_info = get_xtensa_relax_info (sec); | |
7378 | BFD_ASSERT (relax_info); | |
e0001a05 NC |
7379 | if (!relax_info->is_relaxable_literal_section) |
7380 | return ok; | |
7381 | ||
7382 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
7383 | link_info->keep_memory); | |
7384 | ||
43cd72b9 | 7385 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 | 7386 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 7387 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
7388 | { |
7389 | ok = FALSE; | |
7390 | goto error_return; | |
7391 | } | |
7392 | ||
7393 | /* Sort the source_relocs by target offset. */ | |
7394 | src_relocs = relax_info->src_relocs; | |
7395 | qsort (src_relocs, relax_info->src_count, | |
7396 | sizeof (source_reloc), source_reloc_compare); | |
43cd72b9 BW |
7397 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
7398 | internal_reloc_compare); | |
e0001a05 | 7399 | |
43cd72b9 BW |
7400 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
7401 | XTENSA_PROP_SEC_NAME, FALSE); | |
7402 | if (ptblsize < 0) | |
7403 | { | |
7404 | ok = FALSE; | |
7405 | goto error_return; | |
7406 | } | |
7407 | ||
7408 | prev_i = -1; | |
e0001a05 NC |
7409 | for (i = 0; i < relax_info->src_count; i++) |
7410 | { | |
e0001a05 | 7411 | Elf_Internal_Rela *irel = NULL; |
e0001a05 NC |
7412 | |
7413 | rel = &src_relocs[i]; | |
43cd72b9 BW |
7414 | if (get_l32r_opcode () != rel->opcode) |
7415 | continue; | |
e0001a05 NC |
7416 | irel = get_irel_at_offset (sec, internal_relocs, |
7417 | rel->r_rel.target_offset); | |
7418 | ||
43cd72b9 BW |
7419 | /* If the relocation on this is not a simple R_XTENSA_32 or |
7420 | R_XTENSA_PLT then do not consider it. This may happen when | |
7421 | the difference of two symbols is used in a literal. */ | |
7422 | if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32 | |
7423 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT)) | |
7424 | continue; | |
7425 | ||
e0001a05 NC |
7426 | /* If the target_offset for this relocation is the same as the |
7427 | previous relocation, then we've already considered whether the | |
7428 | literal can be coalesced. Skip to the next one.... */ | |
43cd72b9 BW |
7429 | if (i != 0 && prev_i != -1 |
7430 | && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset) | |
e0001a05 | 7431 | continue; |
43cd72b9 BW |
7432 | prev_i = i; |
7433 | ||
7434 | if (last_loc_is_prev && | |
7435 | last_target_offset + 4 != rel->r_rel.target_offset) | |
7436 | last_loc_is_prev = FALSE; | |
e0001a05 NC |
7437 | |
7438 | /* Check if the relocation was from an L32R that is being removed | |
7439 | because a CALLX was converted to a direct CALL, and check if | |
7440 | there are no other relocations to the literal. */ | |
99ded152 BW |
7441 | if (is_removable_literal (rel, i, src_relocs, relax_info->src_count, |
7442 | sec, prop_table, ptblsize)) | |
e0001a05 | 7443 | { |
43cd72b9 BW |
7444 | if (!remove_dead_literal (abfd, sec, link_info, internal_relocs, |
7445 | irel, rel, prop_table, ptblsize)) | |
e0001a05 | 7446 | { |
43cd72b9 BW |
7447 | ok = FALSE; |
7448 | goto error_return; | |
e0001a05 | 7449 | } |
43cd72b9 | 7450 | last_target_offset = rel->r_rel.target_offset; |
e0001a05 NC |
7451 | continue; |
7452 | } | |
7453 | ||
43cd72b9 BW |
7454 | if (!identify_literal_placement (abfd, sec, contents, link_info, |
7455 | values, | |
7456 | &last_loc_is_prev, irel, | |
7457 | relax_info->src_count - i, rel, | |
7458 | prop_table, ptblsize, | |
7459 | &target_sec_cache, rel->is_abs_literal)) | |
e0001a05 | 7460 | { |
43cd72b9 BW |
7461 | ok = FALSE; |
7462 | goto error_return; | |
7463 | } | |
7464 | last_target_offset = rel->r_rel.target_offset; | |
7465 | } | |
e0001a05 | 7466 | |
43cd72b9 BW |
7467 | #if DEBUG |
7468 | print_removed_literals (stderr, &relax_info->removed_list); | |
7469 | print_action_list (stderr, &relax_info->action_list); | |
7470 | #endif /* DEBUG */ | |
7471 | ||
7472 | error_return: | |
7473 | if (prop_table) free (prop_table); | |
7474 | clear_section_cache (&target_sec_cache); | |
7475 | ||
7476 | release_contents (sec, contents); | |
7477 | release_internal_relocs (sec, internal_relocs); | |
7478 | return ok; | |
7479 | } | |
7480 | ||
7481 | ||
7482 | static Elf_Internal_Rela * | |
7fa3d080 BW |
7483 | get_irel_at_offset (asection *sec, |
7484 | Elf_Internal_Rela *internal_relocs, | |
7485 | bfd_vma offset) | |
43cd72b9 BW |
7486 | { |
7487 | unsigned i; | |
7488 | Elf_Internal_Rela *irel; | |
7489 | unsigned r_type; | |
7490 | Elf_Internal_Rela key; | |
7491 | ||
7492 | if (!internal_relocs) | |
7493 | return NULL; | |
7494 | ||
7495 | key.r_offset = offset; | |
7496 | irel = bsearch (&key, internal_relocs, sec->reloc_count, | |
7497 | sizeof (Elf_Internal_Rela), internal_reloc_matches); | |
7498 | if (!irel) | |
7499 | return NULL; | |
7500 | ||
7501 | /* bsearch does not guarantee which will be returned if there are | |
7502 | multiple matches. We need the first that is not an alignment. */ | |
7503 | i = irel - internal_relocs; | |
7504 | while (i > 0) | |
7505 | { | |
7506 | if (internal_relocs[i-1].r_offset != offset) | |
7507 | break; | |
7508 | i--; | |
7509 | } | |
7510 | for ( ; i < sec->reloc_count; i++) | |
7511 | { | |
7512 | irel = &internal_relocs[i]; | |
7513 | r_type = ELF32_R_TYPE (irel->r_info); | |
7514 | if (irel->r_offset == offset && r_type != R_XTENSA_NONE) | |
7515 | return irel; | |
7516 | } | |
7517 | ||
7518 | return NULL; | |
7519 | } | |
7520 | ||
7521 | ||
7522 | bfd_boolean | |
7fa3d080 BW |
7523 | is_removable_literal (const source_reloc *rel, |
7524 | int i, | |
7525 | const source_reloc *src_relocs, | |
99ded152 BW |
7526 | int src_count, |
7527 | asection *sec, | |
7528 | property_table_entry *prop_table, | |
7529 | int ptblsize) | |
43cd72b9 BW |
7530 | { |
7531 | const source_reloc *curr_rel; | |
99ded152 BW |
7532 | property_table_entry *entry; |
7533 | ||
43cd72b9 BW |
7534 | if (!rel->is_null) |
7535 | return FALSE; | |
7536 | ||
99ded152 BW |
7537 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, |
7538 | sec->vma + rel->r_rel.target_offset); | |
7539 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) | |
7540 | return FALSE; | |
7541 | ||
43cd72b9 BW |
7542 | for (++i; i < src_count; ++i) |
7543 | { | |
7544 | curr_rel = &src_relocs[i]; | |
7545 | /* If all others have the same target offset.... */ | |
7546 | if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset) | |
7547 | return TRUE; | |
7548 | ||
7549 | if (!curr_rel->is_null | |
7550 | && !xtensa_is_property_section (curr_rel->source_sec) | |
7551 | && !(curr_rel->source_sec->flags & SEC_DEBUGGING)) | |
7552 | return FALSE; | |
7553 | } | |
7554 | return TRUE; | |
7555 | } | |
7556 | ||
7557 | ||
7558 | bfd_boolean | |
7fa3d080 BW |
7559 | remove_dead_literal (bfd *abfd, |
7560 | asection *sec, | |
7561 | struct bfd_link_info *link_info, | |
7562 | Elf_Internal_Rela *internal_relocs, | |
7563 | Elf_Internal_Rela *irel, | |
7564 | source_reloc *rel, | |
7565 | property_table_entry *prop_table, | |
7566 | int ptblsize) | |
43cd72b9 BW |
7567 | { |
7568 | property_table_entry *entry; | |
7569 | xtensa_relax_info *relax_info; | |
7570 | ||
7571 | relax_info = get_xtensa_relax_info (sec); | |
7572 | if (!relax_info) | |
7573 | return FALSE; | |
7574 | ||
7575 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7576 | sec->vma + rel->r_rel.target_offset); | |
7577 | ||
7578 | /* Mark the unused literal so that it will be removed. */ | |
7579 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL); | |
7580 | ||
7581 | text_action_add (&relax_info->action_list, | |
7582 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7583 | ||
7584 | /* If the section is 4-byte aligned, do not add fill. */ | |
7585 | if (sec->alignment_power > 2) | |
7586 | { | |
7587 | int fill_extra_space; | |
7588 | bfd_vma entry_sec_offset; | |
7589 | text_action *fa; | |
7590 | property_table_entry *the_add_entry; | |
7591 | int removed_diff; | |
7592 | ||
7593 | if (entry) | |
7594 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
7595 | else | |
7596 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
7597 | ||
7598 | /* If the literal range is at the end of the section, | |
7599 | do not add fill. */ | |
7600 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7601 | entry_sec_offset); | |
7602 | fill_extra_space = compute_fill_extra_space (the_add_entry); | |
7603 | ||
7604 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
7605 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
7606 | -4, fill_extra_space); | |
7607 | if (fa) | |
7608 | adjust_fill_action (fa, removed_diff); | |
7609 | else | |
7610 | text_action_add (&relax_info->action_list, | |
7611 | ta_fill, sec, entry_sec_offset, removed_diff); | |
7612 | } | |
7613 | ||
7614 | /* Zero out the relocation on this literal location. */ | |
7615 | if (irel) | |
7616 | { | |
7617 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
7618 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
7619 | ||
7620 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7621 | pin_internal_relocs (sec, internal_relocs); | |
7622 | } | |
7623 | ||
7624 | /* Do not modify "last_loc_is_prev". */ | |
7625 | return TRUE; | |
7626 | } | |
7627 | ||
7628 | ||
7629 | bfd_boolean | |
7fa3d080 BW |
7630 | identify_literal_placement (bfd *abfd, |
7631 | asection *sec, | |
7632 | bfd_byte *contents, | |
7633 | struct bfd_link_info *link_info, | |
7634 | value_map_hash_table *values, | |
7635 | bfd_boolean *last_loc_is_prev_p, | |
7636 | Elf_Internal_Rela *irel, | |
7637 | int remaining_src_rels, | |
7638 | source_reloc *rel, | |
7639 | property_table_entry *prop_table, | |
7640 | int ptblsize, | |
7641 | section_cache_t *target_sec_cache, | |
7642 | bfd_boolean is_abs_literal) | |
43cd72b9 BW |
7643 | { |
7644 | literal_value val; | |
7645 | value_map *val_map; | |
7646 | xtensa_relax_info *relax_info; | |
7647 | bfd_boolean literal_placed = FALSE; | |
7648 | r_reloc r_rel; | |
7649 | unsigned long value; | |
7650 | bfd_boolean final_static_link; | |
7651 | bfd_size_type sec_size; | |
7652 | ||
7653 | relax_info = get_xtensa_relax_info (sec); | |
7654 | if (!relax_info) | |
7655 | return FALSE; | |
7656 | ||
7657 | sec_size = bfd_get_section_limit (abfd, sec); | |
7658 | ||
7659 | final_static_link = | |
7660 | (!link_info->relocatable | |
7661 | && !elf_hash_table (link_info)->dynamic_sections_created); | |
7662 | ||
7663 | /* The placement algorithm first checks to see if the literal is | |
7664 | already in the value map. If so and the value map is reachable | |
7665 | from all uses, then the literal is moved to that location. If | |
7666 | not, then we identify the last location where a fresh literal was | |
7667 | placed. If the literal can be safely moved there, then we do so. | |
7668 | If not, then we assume that the literal is not to move and leave | |
7669 | the literal where it is, marking it as the last literal | |
7670 | location. */ | |
7671 | ||
7672 | /* Find the literal value. */ | |
7673 | value = 0; | |
7674 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7675 | if (!irel) | |
7676 | { | |
7677 | BFD_ASSERT (rel->r_rel.target_offset < sec_size); | |
7678 | value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset); | |
7679 | } | |
7680 | init_literal_value (&val, &r_rel, value, is_abs_literal); | |
7681 | ||
7682 | /* Check if we've seen another literal with the same value that | |
7683 | is in the same output section. */ | |
7684 | val_map = value_map_get_cached_value (values, &val, final_static_link); | |
7685 | ||
7686 | if (val_map | |
7687 | && (r_reloc_get_section (&val_map->loc)->output_section | |
7688 | == sec->output_section) | |
7689 | && relocations_reach (rel, remaining_src_rels, &val_map->loc) | |
7690 | && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map)) | |
7691 | { | |
7692 | /* No change to last_loc_is_prev. */ | |
7693 | literal_placed = TRUE; | |
7694 | } | |
7695 | ||
7696 | /* For relocatable links, do not try to move literals. To do it | |
7697 | correctly might increase the number of relocations in an input | |
7698 | section making the default relocatable linking fail. */ | |
7699 | if (!link_info->relocatable && !literal_placed | |
7700 | && values->has_last_loc && !(*last_loc_is_prev_p)) | |
7701 | { | |
7702 | asection *target_sec = r_reloc_get_section (&values->last_loc); | |
7703 | if (target_sec && target_sec->output_section == sec->output_section) | |
7704 | { | |
7705 | /* Increment the virtual offset. */ | |
7706 | r_reloc try_loc = values->last_loc; | |
7707 | try_loc.virtual_offset += 4; | |
7708 | ||
7709 | /* There is a last loc that was in the same output section. */ | |
7710 | if (relocations_reach (rel, remaining_src_rels, &try_loc) | |
7711 | && move_shared_literal (sec, link_info, rel, | |
7712 | prop_table, ptblsize, | |
7713 | &try_loc, &val, target_sec_cache)) | |
e0001a05 | 7714 | { |
43cd72b9 BW |
7715 | values->last_loc.virtual_offset += 4; |
7716 | literal_placed = TRUE; | |
7717 | if (!val_map) | |
7718 | val_map = add_value_map (values, &val, &try_loc, | |
7719 | final_static_link); | |
7720 | else | |
7721 | val_map->loc = try_loc; | |
e0001a05 NC |
7722 | } |
7723 | } | |
43cd72b9 BW |
7724 | } |
7725 | ||
7726 | if (!literal_placed) | |
7727 | { | |
7728 | /* Nothing worked, leave the literal alone but update the last loc. */ | |
7729 | values->has_last_loc = TRUE; | |
7730 | values->last_loc = rel->r_rel; | |
7731 | if (!val_map) | |
7732 | val_map = add_value_map (values, &val, &rel->r_rel, final_static_link); | |
e0001a05 | 7733 | else |
43cd72b9 BW |
7734 | val_map->loc = rel->r_rel; |
7735 | *last_loc_is_prev_p = TRUE; | |
e0001a05 NC |
7736 | } |
7737 | ||
43cd72b9 | 7738 | return TRUE; |
e0001a05 NC |
7739 | } |
7740 | ||
7741 | ||
7742 | /* Check if the original relocations (presumably on L32R instructions) | |
7743 | identified by reloc[0..N] can be changed to reference the literal | |
7744 | identified by r_rel. If r_rel is out of range for any of the | |
7745 | original relocations, then we don't want to coalesce the original | |
7746 | literal with the one at r_rel. We only check reloc[0..N], where the | |
7747 | offsets are all the same as for reloc[0] (i.e., they're all | |
7748 | referencing the same literal) and where N is also bounded by the | |
7749 | number of remaining entries in the "reloc" array. The "reloc" array | |
7750 | is sorted by target offset so we know all the entries for the same | |
7751 | literal will be contiguous. */ | |
7752 | ||
7753 | static bfd_boolean | |
7fa3d080 BW |
7754 | relocations_reach (source_reloc *reloc, |
7755 | int remaining_relocs, | |
7756 | const r_reloc *r_rel) | |
e0001a05 NC |
7757 | { |
7758 | bfd_vma from_offset, source_address, dest_address; | |
7759 | asection *sec; | |
7760 | int i; | |
7761 | ||
7762 | if (!r_reloc_is_defined (r_rel)) | |
7763 | return FALSE; | |
7764 | ||
7765 | sec = r_reloc_get_section (r_rel); | |
7766 | from_offset = reloc[0].r_rel.target_offset; | |
7767 | ||
7768 | for (i = 0; i < remaining_relocs; i++) | |
7769 | { | |
7770 | if (reloc[i].r_rel.target_offset != from_offset) | |
7771 | break; | |
7772 | ||
7773 | /* Ignore relocations that have been removed. */ | |
7774 | if (reloc[i].is_null) | |
7775 | continue; | |
7776 | ||
7777 | /* The original and new output section for these must be the same | |
7778 | in order to coalesce. */ | |
7779 | if (r_reloc_get_section (&reloc[i].r_rel)->output_section | |
7780 | != sec->output_section) | |
7781 | return FALSE; | |
7782 | ||
d638e0ac BW |
7783 | /* Absolute literals in the same output section can always be |
7784 | combined. */ | |
7785 | if (reloc[i].is_abs_literal) | |
7786 | continue; | |
7787 | ||
43cd72b9 BW |
7788 | /* A literal with no PC-relative relocations can be moved anywhere. */ |
7789 | if (reloc[i].opnd != -1) | |
e0001a05 NC |
7790 | { |
7791 | /* Otherwise, check to see that it fits. */ | |
7792 | source_address = (reloc[i].source_sec->output_section->vma | |
7793 | + reloc[i].source_sec->output_offset | |
7794 | + reloc[i].r_rel.rela.r_offset); | |
7795 | dest_address = (sec->output_section->vma | |
7796 | + sec->output_offset | |
7797 | + r_rel->target_offset); | |
7798 | ||
43cd72b9 BW |
7799 | if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd, |
7800 | source_address, dest_address)) | |
e0001a05 NC |
7801 | return FALSE; |
7802 | } | |
7803 | } | |
7804 | ||
7805 | return TRUE; | |
7806 | } | |
7807 | ||
7808 | ||
43cd72b9 BW |
7809 | /* Move a literal to another literal location because it is |
7810 | the same as the other literal value. */ | |
e0001a05 | 7811 | |
43cd72b9 | 7812 | static bfd_boolean |
7fa3d080 BW |
7813 | coalesce_shared_literal (asection *sec, |
7814 | source_reloc *rel, | |
7815 | property_table_entry *prop_table, | |
7816 | int ptblsize, | |
7817 | value_map *val_map) | |
e0001a05 | 7818 | { |
43cd72b9 BW |
7819 | property_table_entry *entry; |
7820 | text_action *fa; | |
7821 | property_table_entry *the_add_entry; | |
7822 | int removed_diff; | |
7823 | xtensa_relax_info *relax_info; | |
7824 | ||
7825 | relax_info = get_xtensa_relax_info (sec); | |
7826 | if (!relax_info) | |
7827 | return FALSE; | |
7828 | ||
7829 | entry = elf_xtensa_find_property_entry | |
7830 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
99ded152 | 7831 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) |
43cd72b9 BW |
7832 | return TRUE; |
7833 | ||
7834 | /* Mark that the literal will be coalesced. */ | |
7835 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc); | |
7836 | ||
7837 | text_action_add (&relax_info->action_list, | |
7838 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7839 | ||
7840 | /* If the section is 4-byte aligned, do not add fill. */ | |
7841 | if (sec->alignment_power > 2) | |
e0001a05 | 7842 | { |
43cd72b9 BW |
7843 | int fill_extra_space; |
7844 | bfd_vma entry_sec_offset; | |
7845 | ||
7846 | if (entry) | |
7847 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
7848 | else | |
7849 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
7850 | ||
7851 | /* If the literal range is at the end of the section, | |
7852 | do not add fill. */ | |
7853 | fill_extra_space = 0; | |
7854 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7855 | entry_sec_offset); | |
7856 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
7857 | fill_extra_space = the_add_entry->size; | |
7858 | ||
7859 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
7860 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
7861 | -4, fill_extra_space); | |
7862 | if (fa) | |
7863 | adjust_fill_action (fa, removed_diff); | |
7864 | else | |
7865 | text_action_add (&relax_info->action_list, | |
7866 | ta_fill, sec, entry_sec_offset, removed_diff); | |
e0001a05 | 7867 | } |
43cd72b9 BW |
7868 | |
7869 | return TRUE; | |
7870 | } | |
7871 | ||
7872 | ||
7873 | /* Move a literal to another location. This may actually increase the | |
7874 | total amount of space used because of alignments so we need to do | |
7875 | this carefully. Also, it may make a branch go out of range. */ | |
7876 | ||
7877 | static bfd_boolean | |
7fa3d080 BW |
7878 | move_shared_literal (asection *sec, |
7879 | struct bfd_link_info *link_info, | |
7880 | source_reloc *rel, | |
7881 | property_table_entry *prop_table, | |
7882 | int ptblsize, | |
7883 | const r_reloc *target_loc, | |
7884 | const literal_value *lit_value, | |
7885 | section_cache_t *target_sec_cache) | |
43cd72b9 BW |
7886 | { |
7887 | property_table_entry *the_add_entry, *src_entry, *target_entry = NULL; | |
7888 | text_action *fa, *target_fa; | |
7889 | int removed_diff; | |
7890 | xtensa_relax_info *relax_info, *target_relax_info; | |
7891 | asection *target_sec; | |
7892 | ebb_t *ebb; | |
7893 | ebb_constraint ebb_table; | |
7894 | bfd_boolean relocs_fit; | |
7895 | ||
7896 | /* If this routine always returns FALSE, the literals that cannot be | |
7897 | coalesced will not be moved. */ | |
7898 | if (elf32xtensa_no_literal_movement) | |
7899 | return FALSE; | |
7900 | ||
7901 | relax_info = get_xtensa_relax_info (sec); | |
7902 | if (!relax_info) | |
7903 | return FALSE; | |
7904 | ||
7905 | target_sec = r_reloc_get_section (target_loc); | |
7906 | target_relax_info = get_xtensa_relax_info (target_sec); | |
7907 | ||
7908 | /* Literals to undefined sections may not be moved because they | |
7909 | must report an error. */ | |
7910 | if (bfd_is_und_section (target_sec)) | |
7911 | return FALSE; | |
7912 | ||
7913 | src_entry = elf_xtensa_find_property_entry | |
7914 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
7915 | ||
7916 | if (!section_cache_section (target_sec_cache, target_sec, link_info)) | |
7917 | return FALSE; | |
7918 | ||
7919 | target_entry = elf_xtensa_find_property_entry | |
7920 | (target_sec_cache->ptbl, target_sec_cache->pte_count, | |
7921 | target_sec->vma + target_loc->target_offset); | |
7922 | ||
7923 | if (!target_entry) | |
7924 | return FALSE; | |
7925 | ||
7926 | /* Make sure that we have not broken any branches. */ | |
7927 | relocs_fit = FALSE; | |
7928 | ||
7929 | init_ebb_constraint (&ebb_table); | |
7930 | ebb = &ebb_table.ebb; | |
7931 | init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents, | |
7932 | target_sec_cache->content_length, | |
7933 | target_sec_cache->ptbl, target_sec_cache->pte_count, | |
7934 | target_sec_cache->relocs, target_sec_cache->reloc_count); | |
7935 | ||
7936 | /* Propose to add 4 bytes + worst-case alignment size increase to | |
7937 | destination. */ | |
7938 | ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0, | |
7939 | ta_fill, target_loc->target_offset, | |
7940 | -4 - (1 << target_sec->alignment_power), TRUE); | |
7941 | ||
7942 | /* Check all of the PC-relative relocations to make sure they still fit. */ | |
7943 | relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec, | |
7944 | target_sec_cache->contents, | |
7945 | target_sec_cache->relocs, | |
cb337148 | 7946 | &ebb_table, NULL); |
43cd72b9 BW |
7947 | |
7948 | if (!relocs_fit) | |
7949 | return FALSE; | |
7950 | ||
7951 | text_action_add_literal (&target_relax_info->action_list, | |
7952 | ta_add_literal, target_loc, lit_value, -4); | |
7953 | ||
7954 | if (target_sec->alignment_power > 2 && target_entry != src_entry) | |
7955 | { | |
7956 | /* May need to add or remove some fill to maintain alignment. */ | |
7957 | int fill_extra_space; | |
7958 | bfd_vma entry_sec_offset; | |
7959 | ||
7960 | entry_sec_offset = | |
7961 | target_entry->address - target_sec->vma + target_entry->size; | |
7962 | ||
7963 | /* If the literal range is at the end of the section, | |
7964 | do not add fill. */ | |
7965 | fill_extra_space = 0; | |
7966 | the_add_entry = | |
7967 | elf_xtensa_find_property_entry (target_sec_cache->ptbl, | |
7968 | target_sec_cache->pte_count, | |
7969 | entry_sec_offset); | |
7970 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
7971 | fill_extra_space = the_add_entry->size; | |
7972 | ||
7973 | target_fa = find_fill_action (&target_relax_info->action_list, | |
7974 | target_sec, entry_sec_offset); | |
7975 | removed_diff = compute_removed_action_diff (target_fa, target_sec, | |
7976 | entry_sec_offset, 4, | |
7977 | fill_extra_space); | |
7978 | if (target_fa) | |
7979 | adjust_fill_action (target_fa, removed_diff); | |
7980 | else | |
7981 | text_action_add (&target_relax_info->action_list, | |
7982 | ta_fill, target_sec, entry_sec_offset, removed_diff); | |
7983 | } | |
7984 | ||
7985 | /* Mark that the literal will be moved to the new location. */ | |
7986 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc); | |
7987 | ||
7988 | /* Remove the literal. */ | |
7989 | text_action_add (&relax_info->action_list, | |
7990 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7991 | ||
7992 | /* If the section is 4-byte aligned, do not add fill. */ | |
7993 | if (sec->alignment_power > 2 && target_entry != src_entry) | |
7994 | { | |
7995 | int fill_extra_space; | |
7996 | bfd_vma entry_sec_offset; | |
7997 | ||
7998 | if (src_entry) | |
7999 | entry_sec_offset = src_entry->address - sec->vma + src_entry->size; | |
8000 | else | |
8001 | entry_sec_offset = rel->r_rel.target_offset+4; | |
8002 | ||
8003 | /* If the literal range is at the end of the section, | |
8004 | do not add fill. */ | |
8005 | fill_extra_space = 0; | |
8006 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8007 | entry_sec_offset); | |
8008 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
8009 | fill_extra_space = the_add_entry->size; | |
8010 | ||
8011 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8012 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8013 | -4, fill_extra_space); | |
8014 | if (fa) | |
8015 | adjust_fill_action (fa, removed_diff); | |
8016 | else | |
8017 | text_action_add (&relax_info->action_list, | |
8018 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8019 | } | |
8020 | ||
8021 | return TRUE; | |
e0001a05 NC |
8022 | } |
8023 | ||
8024 | \f | |
8025 | /* Second relaxation pass. */ | |
8026 | ||
8027 | /* Modify all of the relocations to point to the right spot, and if this | |
8028 | is a relaxable section, delete the unwanted literals and fix the | |
43cd72b9 | 8029 | section size. */ |
e0001a05 | 8030 | |
43cd72b9 | 8031 | bfd_boolean |
7fa3d080 | 8032 | relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info) |
e0001a05 NC |
8033 | { |
8034 | Elf_Internal_Rela *internal_relocs; | |
8035 | xtensa_relax_info *relax_info; | |
8036 | bfd_byte *contents; | |
8037 | bfd_boolean ok = TRUE; | |
8038 | unsigned i; | |
43cd72b9 BW |
8039 | bfd_boolean rv = FALSE; |
8040 | bfd_boolean virtual_action; | |
8041 | bfd_size_type sec_size; | |
e0001a05 | 8042 | |
43cd72b9 | 8043 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8044 | relax_info = get_xtensa_relax_info (sec); |
8045 | BFD_ASSERT (relax_info); | |
8046 | ||
43cd72b9 BW |
8047 | /* First translate any of the fixes that have been added already. */ |
8048 | translate_section_fixes (sec); | |
8049 | ||
e0001a05 NC |
8050 | /* Handle property sections (e.g., literal tables) specially. */ |
8051 | if (xtensa_is_property_section (sec)) | |
8052 | { | |
8053 | BFD_ASSERT (!relax_info->is_relaxable_literal_section); | |
8054 | return relax_property_section (abfd, sec, link_info); | |
8055 | } | |
8056 | ||
43cd72b9 BW |
8057 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8058 | link_info->keep_memory); | |
8059 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
8060 | if (contents == NULL && sec_size != 0) | |
8061 | { | |
8062 | ok = FALSE; | |
8063 | goto error_return; | |
8064 | } | |
8065 | ||
8066 | if (internal_relocs) | |
8067 | { | |
8068 | for (i = 0; i < sec->reloc_count; i++) | |
8069 | { | |
8070 | Elf_Internal_Rela *irel; | |
8071 | xtensa_relax_info *target_relax_info; | |
8072 | bfd_vma source_offset, old_source_offset; | |
8073 | r_reloc r_rel; | |
8074 | unsigned r_type; | |
8075 | asection *target_sec; | |
8076 | ||
8077 | /* Locally change the source address. | |
8078 | Translate the target to the new target address. | |
8079 | If it points to this section and has been removed, | |
8080 | NULLify it. | |
8081 | Write it back. */ | |
8082 | ||
8083 | irel = &internal_relocs[i]; | |
8084 | source_offset = irel->r_offset; | |
8085 | old_source_offset = source_offset; | |
8086 | ||
8087 | r_type = ELF32_R_TYPE (irel->r_info); | |
8088 | r_reloc_init (&r_rel, abfd, irel, contents, | |
8089 | bfd_get_section_limit (abfd, sec)); | |
8090 | ||
8091 | /* If this section could have changed then we may need to | |
8092 | change the relocation's offset. */ | |
8093 | ||
8094 | if (relax_info->is_relaxable_literal_section | |
8095 | || relax_info->is_relaxable_asm_section) | |
8096 | { | |
9b7f5d20 BW |
8097 | pin_internal_relocs (sec, internal_relocs); |
8098 | ||
43cd72b9 BW |
8099 | if (r_type != R_XTENSA_NONE |
8100 | && find_removed_literal (&relax_info->removed_list, | |
8101 | irel->r_offset)) | |
8102 | { | |
8103 | /* Remove this relocation. */ | |
8104 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8105 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8106 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8107 | irel->r_offset = offset_with_removed_text | |
8108 | (&relax_info->action_list, irel->r_offset); | |
43cd72b9 BW |
8109 | continue; |
8110 | } | |
8111 | ||
8112 | if (r_type == R_XTENSA_ASM_SIMPLIFY) | |
8113 | { | |
8114 | text_action *action = | |
8115 | find_insn_action (&relax_info->action_list, | |
8116 | irel->r_offset); | |
8117 | if (action && (action->action == ta_convert_longcall | |
8118 | || action->action == ta_remove_longcall)) | |
8119 | { | |
8120 | bfd_reloc_status_type retval; | |
8121 | char *error_message = NULL; | |
8122 | ||
8123 | retval = contract_asm_expansion (contents, sec_size, | |
8124 | irel, &error_message); | |
8125 | if (retval != bfd_reloc_ok) | |
8126 | { | |
8127 | (*link_info->callbacks->reloc_dangerous) | |
8128 | (link_info, error_message, abfd, sec, | |
8129 | irel->r_offset); | |
8130 | goto error_return; | |
8131 | } | |
8132 | /* Update the action so that the code that moves | |
8133 | the contents will do the right thing. */ | |
8134 | if (action->action == ta_remove_longcall) | |
8135 | action->action = ta_remove_insn; | |
8136 | else | |
8137 | action->action = ta_none; | |
8138 | /* Refresh the info in the r_rel. */ | |
8139 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8140 | r_type = ELF32_R_TYPE (irel->r_info); | |
8141 | } | |
8142 | } | |
8143 | ||
8144 | source_offset = offset_with_removed_text | |
8145 | (&relax_info->action_list, irel->r_offset); | |
8146 | irel->r_offset = source_offset; | |
8147 | } | |
8148 | ||
8149 | /* If the target section could have changed then | |
8150 | we may need to change the relocation's target offset. */ | |
8151 | ||
8152 | target_sec = r_reloc_get_section (&r_rel); | |
8153 | target_relax_info = get_xtensa_relax_info (target_sec); | |
8154 | ||
8155 | if (target_relax_info | |
8156 | && (target_relax_info->is_relaxable_literal_section | |
8157 | || target_relax_info->is_relaxable_asm_section)) | |
8158 | { | |
8159 | r_reloc new_reloc; | |
9b7f5d20 | 8160 | target_sec = translate_reloc (&r_rel, &new_reloc, target_sec); |
43cd72b9 BW |
8161 | |
8162 | if (r_type == R_XTENSA_DIFF8 | |
8163 | || r_type == R_XTENSA_DIFF16 | |
8164 | || r_type == R_XTENSA_DIFF32) | |
8165 | { | |
8166 | bfd_vma diff_value = 0, new_end_offset, diff_mask = 0; | |
8167 | ||
8168 | if (bfd_get_section_limit (abfd, sec) < old_source_offset) | |
8169 | { | |
8170 | (*link_info->callbacks->reloc_dangerous) | |
8171 | (link_info, _("invalid relocation address"), | |
8172 | abfd, sec, old_source_offset); | |
8173 | goto error_return; | |
8174 | } | |
8175 | ||
8176 | switch (r_type) | |
8177 | { | |
8178 | case R_XTENSA_DIFF8: | |
8179 | diff_value = | |
8180 | bfd_get_8 (abfd, &contents[old_source_offset]); | |
8181 | break; | |
8182 | case R_XTENSA_DIFF16: | |
8183 | diff_value = | |
8184 | bfd_get_16 (abfd, &contents[old_source_offset]); | |
8185 | break; | |
8186 | case R_XTENSA_DIFF32: | |
8187 | diff_value = | |
8188 | bfd_get_32 (abfd, &contents[old_source_offset]); | |
8189 | break; | |
8190 | } | |
8191 | ||
8192 | new_end_offset = offset_with_removed_text | |
8193 | (&target_relax_info->action_list, | |
8194 | r_rel.target_offset + diff_value); | |
8195 | diff_value = new_end_offset - new_reloc.target_offset; | |
8196 | ||
8197 | switch (r_type) | |
8198 | { | |
8199 | case R_XTENSA_DIFF8: | |
8200 | diff_mask = 0xff; | |
8201 | bfd_put_8 (abfd, diff_value, | |
8202 | &contents[old_source_offset]); | |
8203 | break; | |
8204 | case R_XTENSA_DIFF16: | |
8205 | diff_mask = 0xffff; | |
8206 | bfd_put_16 (abfd, diff_value, | |
8207 | &contents[old_source_offset]); | |
8208 | break; | |
8209 | case R_XTENSA_DIFF32: | |
8210 | diff_mask = 0xffffffff; | |
8211 | bfd_put_32 (abfd, diff_value, | |
8212 | &contents[old_source_offset]); | |
8213 | break; | |
8214 | } | |
8215 | ||
8216 | /* Check for overflow. */ | |
8217 | if ((diff_value & ~diff_mask) != 0) | |
8218 | { | |
8219 | (*link_info->callbacks->reloc_dangerous) | |
8220 | (link_info, _("overflow after relaxation"), | |
8221 | abfd, sec, old_source_offset); | |
8222 | goto error_return; | |
8223 | } | |
8224 | ||
8225 | pin_contents (sec, contents); | |
8226 | } | |
9b7f5d20 BW |
8227 | else |
8228 | { | |
8229 | /* If the relocation still references a section in the same | |
8230 | input file, modify the relocation directly instead of | |
8231 | adding a "fix" record. */ | |
8232 | if (target_sec->owner == abfd) | |
8233 | { | |
8234 | unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info); | |
8235 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
8236 | irel->r_addend = new_reloc.rela.r_addend; | |
8237 | pin_internal_relocs (sec, internal_relocs); | |
8238 | } | |
8239 | else | |
8240 | { | |
8241 | bfd_vma addend_displacement; | |
8242 | reloc_bfd_fix *fix; | |
8243 | ||
8244 | addend_displacement = | |
8245 | new_reloc.target_offset + new_reloc.virtual_offset; | |
8246 | fix = reloc_bfd_fix_init (sec, source_offset, r_type, | |
8247 | target_sec, | |
8248 | addend_displacement, TRUE); | |
8249 | add_fix (sec, fix); | |
8250 | } | |
8251 | } | |
43cd72b9 | 8252 | } |
43cd72b9 BW |
8253 | } |
8254 | } | |
8255 | ||
8256 | if ((relax_info->is_relaxable_literal_section | |
8257 | || relax_info->is_relaxable_asm_section) | |
8258 | && relax_info->action_list.head) | |
8259 | { | |
8260 | /* Walk through the planned actions and build up a table | |
8261 | of move, copy and fill records. Use the move, copy and | |
8262 | fill records to perform the actions once. */ | |
8263 | ||
8264 | bfd_size_type size = sec->size; | |
8265 | int removed = 0; | |
8266 | bfd_size_type final_size, copy_size, orig_insn_size; | |
8267 | bfd_byte *scratch = NULL; | |
8268 | bfd_byte *dup_contents = NULL; | |
8269 | bfd_size_type orig_size = size; | |
8270 | bfd_vma orig_dot = 0; | |
8271 | bfd_vma orig_dot_copied = 0; /* Byte copied already from | |
8272 | orig dot in physical memory. */ | |
8273 | bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */ | |
8274 | bfd_vma dup_dot = 0; | |
8275 | ||
8276 | text_action *action = relax_info->action_list.head; | |
8277 | ||
8278 | final_size = sec->size; | |
8279 | for (action = relax_info->action_list.head; action; | |
8280 | action = action->next) | |
8281 | { | |
8282 | final_size -= action->removed_bytes; | |
8283 | } | |
8284 | ||
8285 | scratch = (bfd_byte *) bfd_zmalloc (final_size); | |
8286 | dup_contents = (bfd_byte *) bfd_zmalloc (final_size); | |
8287 | ||
8288 | /* The dot is the current fill location. */ | |
8289 | #if DEBUG | |
8290 | print_action_list (stderr, &relax_info->action_list); | |
8291 | #endif | |
8292 | ||
8293 | for (action = relax_info->action_list.head; action; | |
8294 | action = action->next) | |
8295 | { | |
8296 | virtual_action = FALSE; | |
8297 | if (action->offset > orig_dot) | |
8298 | { | |
8299 | orig_dot += orig_dot_copied; | |
8300 | orig_dot_copied = 0; | |
8301 | orig_dot_vo = 0; | |
8302 | /* Out of the virtual world. */ | |
8303 | } | |
8304 | ||
8305 | if (action->offset > orig_dot) | |
8306 | { | |
8307 | copy_size = action->offset - orig_dot; | |
8308 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
8309 | orig_dot += copy_size; | |
8310 | dup_dot += copy_size; | |
8311 | BFD_ASSERT (action->offset == orig_dot); | |
8312 | } | |
8313 | else if (action->offset < orig_dot) | |
8314 | { | |
8315 | if (action->action == ta_fill | |
8316 | && action->offset - action->removed_bytes == orig_dot) | |
8317 | { | |
8318 | /* This is OK because the fill only effects the dup_dot. */ | |
8319 | } | |
8320 | else if (action->action == ta_add_literal) | |
8321 | { | |
8322 | /* TBD. Might need to handle this. */ | |
8323 | } | |
8324 | } | |
8325 | if (action->offset == orig_dot) | |
8326 | { | |
8327 | if (action->virtual_offset > orig_dot_vo) | |
8328 | { | |
8329 | if (orig_dot_vo == 0) | |
8330 | { | |
8331 | /* Need to copy virtual_offset bytes. Probably four. */ | |
8332 | copy_size = action->virtual_offset - orig_dot_vo; | |
8333 | memmove (&dup_contents[dup_dot], | |
8334 | &contents[orig_dot], copy_size); | |
8335 | orig_dot_copied = copy_size; | |
8336 | dup_dot += copy_size; | |
8337 | } | |
8338 | virtual_action = TRUE; | |
8339 | } | |
8340 | else | |
8341 | BFD_ASSERT (action->virtual_offset <= orig_dot_vo); | |
8342 | } | |
8343 | switch (action->action) | |
8344 | { | |
8345 | case ta_remove_literal: | |
8346 | case ta_remove_insn: | |
8347 | BFD_ASSERT (action->removed_bytes >= 0); | |
8348 | orig_dot += action->removed_bytes; | |
8349 | break; | |
8350 | ||
8351 | case ta_narrow_insn: | |
8352 | orig_insn_size = 3; | |
8353 | copy_size = 2; | |
8354 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
8355 | BFD_ASSERT (action->removed_bytes == 1); | |
64b607e6 | 8356 | rv = narrow_instruction (scratch, final_size, 0); |
43cd72b9 BW |
8357 | BFD_ASSERT (rv); |
8358 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
8359 | orig_dot += orig_insn_size; | |
8360 | dup_dot += copy_size; | |
8361 | break; | |
8362 | ||
8363 | case ta_fill: | |
8364 | if (action->removed_bytes >= 0) | |
8365 | orig_dot += action->removed_bytes; | |
8366 | else | |
8367 | { | |
8368 | /* Already zeroed in dup_contents. Just bump the | |
8369 | counters. */ | |
8370 | dup_dot += (-action->removed_bytes); | |
8371 | } | |
8372 | break; | |
8373 | ||
8374 | case ta_none: | |
8375 | BFD_ASSERT (action->removed_bytes == 0); | |
8376 | break; | |
8377 | ||
8378 | case ta_convert_longcall: | |
8379 | case ta_remove_longcall: | |
8380 | /* These will be removed or converted before we get here. */ | |
8381 | BFD_ASSERT (0); | |
8382 | break; | |
8383 | ||
8384 | case ta_widen_insn: | |
8385 | orig_insn_size = 2; | |
8386 | copy_size = 3; | |
8387 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
8388 | BFD_ASSERT (action->removed_bytes == -1); | |
64b607e6 | 8389 | rv = widen_instruction (scratch, final_size, 0); |
43cd72b9 BW |
8390 | BFD_ASSERT (rv); |
8391 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
8392 | orig_dot += orig_insn_size; | |
8393 | dup_dot += copy_size; | |
8394 | break; | |
8395 | ||
8396 | case ta_add_literal: | |
8397 | orig_insn_size = 0; | |
8398 | copy_size = 4; | |
8399 | BFD_ASSERT (action->removed_bytes == -4); | |
8400 | /* TBD -- place the literal value here and insert | |
8401 | into the table. */ | |
8402 | memset (&dup_contents[dup_dot], 0, 4); | |
8403 | pin_internal_relocs (sec, internal_relocs); | |
8404 | pin_contents (sec, contents); | |
8405 | ||
8406 | if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents, | |
8407 | relax_info, &internal_relocs, &action->value)) | |
8408 | goto error_return; | |
8409 | ||
8410 | if (virtual_action) | |
8411 | orig_dot_vo += copy_size; | |
8412 | ||
8413 | orig_dot += orig_insn_size; | |
8414 | dup_dot += copy_size; | |
8415 | break; | |
8416 | ||
8417 | default: | |
8418 | /* Not implemented yet. */ | |
8419 | BFD_ASSERT (0); | |
8420 | break; | |
8421 | } | |
8422 | ||
8423 | size -= action->removed_bytes; | |
8424 | removed += action->removed_bytes; | |
8425 | BFD_ASSERT (dup_dot <= final_size); | |
8426 | BFD_ASSERT (orig_dot <= orig_size); | |
8427 | } | |
8428 | ||
8429 | orig_dot += orig_dot_copied; | |
8430 | orig_dot_copied = 0; | |
8431 | ||
8432 | if (orig_dot != orig_size) | |
8433 | { | |
8434 | copy_size = orig_size - orig_dot; | |
8435 | BFD_ASSERT (orig_size > orig_dot); | |
8436 | BFD_ASSERT (dup_dot + copy_size == final_size); | |
8437 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
8438 | orig_dot += copy_size; | |
8439 | dup_dot += copy_size; | |
8440 | } | |
8441 | BFD_ASSERT (orig_size == orig_dot); | |
8442 | BFD_ASSERT (final_size == dup_dot); | |
8443 | ||
8444 | /* Move the dup_contents back. */ | |
8445 | if (final_size > orig_size) | |
8446 | { | |
8447 | /* Contents need to be reallocated. Swap the dup_contents into | |
8448 | contents. */ | |
8449 | sec->contents = dup_contents; | |
8450 | free (contents); | |
8451 | contents = dup_contents; | |
8452 | pin_contents (sec, contents); | |
8453 | } | |
8454 | else | |
8455 | { | |
8456 | BFD_ASSERT (final_size <= orig_size); | |
8457 | memset (contents, 0, orig_size); | |
8458 | memcpy (contents, dup_contents, final_size); | |
8459 | free (dup_contents); | |
8460 | } | |
8461 | free (scratch); | |
8462 | pin_contents (sec, contents); | |
8463 | ||
8464 | sec->size = final_size; | |
8465 | } | |
8466 | ||
8467 | error_return: | |
8468 | release_internal_relocs (sec, internal_relocs); | |
8469 | release_contents (sec, contents); | |
8470 | return ok; | |
8471 | } | |
8472 | ||
8473 | ||
8474 | static bfd_boolean | |
7fa3d080 | 8475 | translate_section_fixes (asection *sec) |
43cd72b9 BW |
8476 | { |
8477 | xtensa_relax_info *relax_info; | |
8478 | reloc_bfd_fix *r; | |
8479 | ||
8480 | relax_info = get_xtensa_relax_info (sec); | |
8481 | if (!relax_info) | |
8482 | return TRUE; | |
8483 | ||
8484 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
8485 | if (!translate_reloc_bfd_fix (r)) | |
8486 | return FALSE; | |
e0001a05 | 8487 | |
43cd72b9 BW |
8488 | return TRUE; |
8489 | } | |
e0001a05 | 8490 | |
e0001a05 | 8491 | |
43cd72b9 BW |
8492 | /* Translate a fix given the mapping in the relax info for the target |
8493 | section. If it has already been translated, no work is required. */ | |
e0001a05 | 8494 | |
43cd72b9 | 8495 | static bfd_boolean |
7fa3d080 | 8496 | translate_reloc_bfd_fix (reloc_bfd_fix *fix) |
43cd72b9 BW |
8497 | { |
8498 | reloc_bfd_fix new_fix; | |
8499 | asection *sec; | |
8500 | xtensa_relax_info *relax_info; | |
8501 | removed_literal *removed; | |
8502 | bfd_vma new_offset, target_offset; | |
e0001a05 | 8503 | |
43cd72b9 BW |
8504 | if (fix->translated) |
8505 | return TRUE; | |
e0001a05 | 8506 | |
43cd72b9 BW |
8507 | sec = fix->target_sec; |
8508 | target_offset = fix->target_offset; | |
e0001a05 | 8509 | |
43cd72b9 BW |
8510 | relax_info = get_xtensa_relax_info (sec); |
8511 | if (!relax_info) | |
8512 | { | |
8513 | fix->translated = TRUE; | |
8514 | return TRUE; | |
8515 | } | |
e0001a05 | 8516 | |
43cd72b9 | 8517 | new_fix = *fix; |
e0001a05 | 8518 | |
43cd72b9 BW |
8519 | /* The fix does not need to be translated if the section cannot change. */ |
8520 | if (!relax_info->is_relaxable_literal_section | |
8521 | && !relax_info->is_relaxable_asm_section) | |
8522 | { | |
8523 | fix->translated = TRUE; | |
8524 | return TRUE; | |
8525 | } | |
e0001a05 | 8526 | |
43cd72b9 BW |
8527 | /* If the literal has been moved and this relocation was on an |
8528 | opcode, then the relocation should move to the new literal | |
8529 | location. Otherwise, the relocation should move within the | |
8530 | section. */ | |
8531 | ||
8532 | removed = FALSE; | |
8533 | if (is_operand_relocation (fix->src_type)) | |
8534 | { | |
8535 | /* Check if the original relocation is against a literal being | |
8536 | removed. */ | |
8537 | removed = find_removed_literal (&relax_info->removed_list, | |
8538 | target_offset); | |
e0001a05 NC |
8539 | } |
8540 | ||
43cd72b9 | 8541 | if (removed) |
e0001a05 | 8542 | { |
43cd72b9 | 8543 | asection *new_sec; |
e0001a05 | 8544 | |
43cd72b9 BW |
8545 | /* The fact that there is still a relocation to this literal indicates |
8546 | that the literal is being coalesced, not simply removed. */ | |
8547 | BFD_ASSERT (removed->to.abfd != NULL); | |
e0001a05 | 8548 | |
43cd72b9 BW |
8549 | /* This was moved to some other address (possibly another section). */ |
8550 | new_sec = r_reloc_get_section (&removed->to); | |
8551 | if (new_sec != sec) | |
e0001a05 | 8552 | { |
43cd72b9 BW |
8553 | sec = new_sec; |
8554 | relax_info = get_xtensa_relax_info (sec); | |
8555 | if (!relax_info || | |
8556 | (!relax_info->is_relaxable_literal_section | |
8557 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 | 8558 | { |
43cd72b9 BW |
8559 | target_offset = removed->to.target_offset; |
8560 | new_fix.target_sec = new_sec; | |
8561 | new_fix.target_offset = target_offset; | |
8562 | new_fix.translated = TRUE; | |
8563 | *fix = new_fix; | |
8564 | return TRUE; | |
e0001a05 | 8565 | } |
e0001a05 | 8566 | } |
43cd72b9 BW |
8567 | target_offset = removed->to.target_offset; |
8568 | new_fix.target_sec = new_sec; | |
e0001a05 | 8569 | } |
43cd72b9 BW |
8570 | |
8571 | /* The target address may have been moved within its section. */ | |
8572 | new_offset = offset_with_removed_text (&relax_info->action_list, | |
8573 | target_offset); | |
8574 | ||
8575 | new_fix.target_offset = new_offset; | |
8576 | new_fix.target_offset = new_offset; | |
8577 | new_fix.translated = TRUE; | |
8578 | *fix = new_fix; | |
8579 | return TRUE; | |
e0001a05 NC |
8580 | } |
8581 | ||
8582 | ||
8583 | /* Fix up a relocation to take account of removed literals. */ | |
8584 | ||
9b7f5d20 BW |
8585 | static asection * |
8586 | translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec) | |
e0001a05 | 8587 | { |
e0001a05 NC |
8588 | xtensa_relax_info *relax_info; |
8589 | removed_literal *removed; | |
9b7f5d20 BW |
8590 | bfd_vma target_offset, base_offset; |
8591 | text_action *act; | |
e0001a05 NC |
8592 | |
8593 | *new_rel = *orig_rel; | |
8594 | ||
8595 | if (!r_reloc_is_defined (orig_rel)) | |
9b7f5d20 | 8596 | return sec ; |
e0001a05 NC |
8597 | |
8598 | relax_info = get_xtensa_relax_info (sec); | |
9b7f5d20 BW |
8599 | BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section |
8600 | || relax_info->is_relaxable_asm_section)); | |
e0001a05 | 8601 | |
43cd72b9 BW |
8602 | target_offset = orig_rel->target_offset; |
8603 | ||
8604 | removed = FALSE; | |
8605 | if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info))) | |
8606 | { | |
8607 | /* Check if the original relocation is against a literal being | |
8608 | removed. */ | |
8609 | removed = find_removed_literal (&relax_info->removed_list, | |
8610 | target_offset); | |
8611 | } | |
8612 | if (removed && removed->to.abfd) | |
e0001a05 NC |
8613 | { |
8614 | asection *new_sec; | |
8615 | ||
8616 | /* The fact that there is still a relocation to this literal indicates | |
8617 | that the literal is being coalesced, not simply removed. */ | |
8618 | BFD_ASSERT (removed->to.abfd != NULL); | |
8619 | ||
43cd72b9 BW |
8620 | /* This was moved to some other address |
8621 | (possibly in another section). */ | |
e0001a05 NC |
8622 | *new_rel = removed->to; |
8623 | new_sec = r_reloc_get_section (new_rel); | |
43cd72b9 | 8624 | if (new_sec != sec) |
e0001a05 NC |
8625 | { |
8626 | sec = new_sec; | |
8627 | relax_info = get_xtensa_relax_info (sec); | |
43cd72b9 BW |
8628 | if (!relax_info |
8629 | || (!relax_info->is_relaxable_literal_section | |
8630 | && !relax_info->is_relaxable_asm_section)) | |
9b7f5d20 | 8631 | return sec; |
e0001a05 | 8632 | } |
43cd72b9 | 8633 | target_offset = new_rel->target_offset; |
e0001a05 NC |
8634 | } |
8635 | ||
9b7f5d20 BW |
8636 | /* Find the base offset of the reloc symbol, excluding any addend from the |
8637 | reloc or from the section contents (for a partial_inplace reloc). Then | |
8638 | find the adjusted values of the offsets due to relaxation. The base | |
8639 | offset is needed to determine the change to the reloc's addend; the reloc | |
8640 | addend should not be adjusted due to relaxations located before the base | |
8641 | offset. */ | |
8642 | ||
8643 | base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend; | |
8644 | act = relax_info->action_list.head; | |
8645 | if (base_offset <= target_offset) | |
8646 | { | |
8647 | int base_removed = removed_by_actions (&act, base_offset, FALSE); | |
8648 | int addend_removed = removed_by_actions (&act, target_offset, FALSE); | |
8649 | new_rel->target_offset = target_offset - base_removed - addend_removed; | |
8650 | new_rel->rela.r_addend -= addend_removed; | |
8651 | } | |
8652 | else | |
8653 | { | |
8654 | /* Handle a negative addend. The base offset comes first. */ | |
8655 | int tgt_removed = removed_by_actions (&act, target_offset, FALSE); | |
8656 | int addend_removed = removed_by_actions (&act, base_offset, FALSE); | |
8657 | new_rel->target_offset = target_offset - tgt_removed; | |
8658 | new_rel->rela.r_addend += addend_removed; | |
8659 | } | |
e0001a05 | 8660 | |
9b7f5d20 | 8661 | return sec; |
e0001a05 NC |
8662 | } |
8663 | ||
8664 | ||
8665 | /* For dynamic links, there may be a dynamic relocation for each | |
8666 | literal. The number of dynamic relocations must be computed in | |
8667 | size_dynamic_sections, which occurs before relaxation. When a | |
8668 | literal is removed, this function checks if there is a corresponding | |
8669 | dynamic relocation and shrinks the size of the appropriate dynamic | |
8670 | relocation section accordingly. At this point, the contents of the | |
8671 | dynamic relocation sections have not yet been filled in, so there's | |
8672 | nothing else that needs to be done. */ | |
8673 | ||
8674 | static void | |
7fa3d080 BW |
8675 | shrink_dynamic_reloc_sections (struct bfd_link_info *info, |
8676 | bfd *abfd, | |
8677 | asection *input_section, | |
8678 | Elf_Internal_Rela *rel) | |
e0001a05 | 8679 | { |
f0e6fdb2 | 8680 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
8681 | Elf_Internal_Shdr *symtab_hdr; |
8682 | struct elf_link_hash_entry **sym_hashes; | |
8683 | unsigned long r_symndx; | |
8684 | int r_type; | |
8685 | struct elf_link_hash_entry *h; | |
8686 | bfd_boolean dynamic_symbol; | |
8687 | ||
f0e6fdb2 | 8688 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
8689 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
8690 | sym_hashes = elf_sym_hashes (abfd); | |
8691 | ||
8692 | r_type = ELF32_R_TYPE (rel->r_info); | |
8693 | r_symndx = ELF32_R_SYM (rel->r_info); | |
8694 | ||
8695 | if (r_symndx < symtab_hdr->sh_info) | |
8696 | h = NULL; | |
8697 | else | |
8698 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
8699 | ||
4608f3d9 | 8700 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 NC |
8701 | |
8702 | if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
8703 | && (input_section->flags & SEC_ALLOC) != 0 | |
8704 | && (dynamic_symbol || info->shared)) | |
8705 | { | |
e0001a05 NC |
8706 | asection *srel; |
8707 | bfd_boolean is_plt = FALSE; | |
8708 | ||
e0001a05 NC |
8709 | if (dynamic_symbol && r_type == R_XTENSA_PLT) |
8710 | { | |
f0e6fdb2 | 8711 | srel = htab->srelplt; |
e0001a05 NC |
8712 | is_plt = TRUE; |
8713 | } | |
8714 | else | |
f0e6fdb2 | 8715 | srel = htab->srelgot; |
e0001a05 NC |
8716 | |
8717 | /* Reduce size of the .rela.* section by one reloc. */ | |
e0001a05 | 8718 | BFD_ASSERT (srel != NULL); |
eea6121a AM |
8719 | BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela)); |
8720 | srel->size -= sizeof (Elf32_External_Rela); | |
e0001a05 NC |
8721 | |
8722 | if (is_plt) | |
8723 | { | |
8724 | asection *splt, *sgotplt, *srelgot; | |
8725 | int reloc_index, chunk; | |
8726 | ||
8727 | /* Find the PLT reloc index of the entry being removed. This | |
8728 | is computed from the size of ".rela.plt". It is needed to | |
8729 | figure out which PLT chunk to resize. Usually "last index | |
8730 | = size - 1" since the index starts at zero, but in this | |
8731 | context, the size has just been decremented so there's no | |
8732 | need to subtract one. */ | |
eea6121a | 8733 | reloc_index = srel->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
8734 | |
8735 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
8736 | splt = elf_xtensa_get_plt_section (info, chunk); |
8737 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
8738 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
8739 | ||
8740 | /* Check if an entire PLT chunk has just been eliminated. */ | |
8741 | if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0) | |
8742 | { | |
8743 | /* The two magic GOT entries for that chunk can go away. */ | |
f0e6fdb2 | 8744 | srelgot = htab->srelgot; |
e0001a05 NC |
8745 | BFD_ASSERT (srelgot != NULL); |
8746 | srelgot->reloc_count -= 2; | |
eea6121a AM |
8747 | srelgot->size -= 2 * sizeof (Elf32_External_Rela); |
8748 | sgotplt->size -= 8; | |
e0001a05 NC |
8749 | |
8750 | /* There should be only one entry left (and it will be | |
8751 | removed below). */ | |
eea6121a AM |
8752 | BFD_ASSERT (sgotplt->size == 4); |
8753 | BFD_ASSERT (splt->size == PLT_ENTRY_SIZE); | |
e0001a05 NC |
8754 | } |
8755 | ||
eea6121a AM |
8756 | BFD_ASSERT (sgotplt->size >= 4); |
8757 | BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE); | |
e0001a05 | 8758 | |
eea6121a AM |
8759 | sgotplt->size -= 4; |
8760 | splt->size -= PLT_ENTRY_SIZE; | |
e0001a05 NC |
8761 | } |
8762 | } | |
8763 | } | |
8764 | ||
8765 | ||
43cd72b9 BW |
8766 | /* Take an r_rel and move it to another section. This usually |
8767 | requires extending the interal_relocation array and pinning it. If | |
8768 | the original r_rel is from the same BFD, we can complete this here. | |
8769 | Otherwise, we add a fix record to let the final link fix the | |
8770 | appropriate address. Contents and internal relocations for the | |
8771 | section must be pinned after calling this routine. */ | |
8772 | ||
8773 | static bfd_boolean | |
7fa3d080 BW |
8774 | move_literal (bfd *abfd, |
8775 | struct bfd_link_info *link_info, | |
8776 | asection *sec, | |
8777 | bfd_vma offset, | |
8778 | bfd_byte *contents, | |
8779 | xtensa_relax_info *relax_info, | |
8780 | Elf_Internal_Rela **internal_relocs_p, | |
8781 | const literal_value *lit) | |
43cd72b9 BW |
8782 | { |
8783 | Elf_Internal_Rela *new_relocs = NULL; | |
8784 | size_t new_relocs_count = 0; | |
8785 | Elf_Internal_Rela this_rela; | |
8786 | const r_reloc *r_rel; | |
8787 | ||
8788 | r_rel = &lit->r_rel; | |
8789 | BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p); | |
8790 | ||
8791 | if (r_reloc_is_const (r_rel)) | |
8792 | bfd_put_32 (abfd, lit->value, contents + offset); | |
8793 | else | |
8794 | { | |
8795 | int r_type; | |
8796 | unsigned i; | |
8797 | asection *target_sec; | |
8798 | reloc_bfd_fix *fix; | |
8799 | unsigned insert_at; | |
8800 | ||
8801 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
8802 | target_sec = r_reloc_get_section (r_rel); | |
8803 | ||
8804 | /* This is the difficult case. We have to create a fix up. */ | |
8805 | this_rela.r_offset = offset; | |
8806 | this_rela.r_info = ELF32_R_INFO (0, r_type); | |
8807 | this_rela.r_addend = | |
8808 | r_rel->target_offset - r_reloc_get_target_offset (r_rel); | |
8809 | bfd_put_32 (abfd, lit->value, contents + offset); | |
8810 | ||
8811 | /* Currently, we cannot move relocations during a relocatable link. */ | |
8812 | BFD_ASSERT (!link_info->relocatable); | |
0f5f1638 | 8813 | fix = reloc_bfd_fix_init (sec, offset, r_type, |
43cd72b9 BW |
8814 | r_reloc_get_section (r_rel), |
8815 | r_rel->target_offset + r_rel->virtual_offset, | |
8816 | FALSE); | |
8817 | /* We also need to mark that relocations are needed here. */ | |
8818 | sec->flags |= SEC_RELOC; | |
8819 | ||
8820 | translate_reloc_bfd_fix (fix); | |
8821 | /* This fix has not yet been translated. */ | |
8822 | add_fix (sec, fix); | |
8823 | ||
8824 | /* Add the relocation. If we have already allocated our own | |
8825 | space for the relocations and we have room for more, then use | |
8826 | it. Otherwise, allocate new space and move the literals. */ | |
8827 | insert_at = sec->reloc_count; | |
8828 | for (i = 0; i < sec->reloc_count; ++i) | |
8829 | { | |
8830 | if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset) | |
8831 | { | |
8832 | insert_at = i; | |
8833 | break; | |
8834 | } | |
8835 | } | |
8836 | ||
8837 | if (*internal_relocs_p != relax_info->allocated_relocs | |
8838 | || sec->reloc_count + 1 > relax_info->allocated_relocs_count) | |
8839 | { | |
8840 | BFD_ASSERT (relax_info->allocated_relocs == NULL | |
8841 | || sec->reloc_count == relax_info->relocs_count); | |
8842 | ||
8843 | if (relax_info->allocated_relocs_count == 0) | |
8844 | new_relocs_count = (sec->reloc_count + 2) * 2; | |
8845 | else | |
8846 | new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2; | |
8847 | ||
8848 | new_relocs = (Elf_Internal_Rela *) | |
8849 | bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count)); | |
8850 | if (!new_relocs) | |
8851 | return FALSE; | |
8852 | ||
8853 | /* We could handle this more quickly by finding the split point. */ | |
8854 | if (insert_at != 0) | |
8855 | memcpy (new_relocs, *internal_relocs_p, | |
8856 | insert_at * sizeof (Elf_Internal_Rela)); | |
8857 | ||
8858 | new_relocs[insert_at] = this_rela; | |
8859 | ||
8860 | if (insert_at != sec->reloc_count) | |
8861 | memcpy (new_relocs + insert_at + 1, | |
8862 | (*internal_relocs_p) + insert_at, | |
8863 | (sec->reloc_count - insert_at) | |
8864 | * sizeof (Elf_Internal_Rela)); | |
8865 | ||
8866 | if (*internal_relocs_p != relax_info->allocated_relocs) | |
8867 | { | |
8868 | /* The first time we re-allocate, we can only free the | |
8869 | old relocs if they were allocated with bfd_malloc. | |
8870 | This is not true when keep_memory is in effect. */ | |
8871 | if (!link_info->keep_memory) | |
8872 | free (*internal_relocs_p); | |
8873 | } | |
8874 | else | |
8875 | free (*internal_relocs_p); | |
8876 | relax_info->allocated_relocs = new_relocs; | |
8877 | relax_info->allocated_relocs_count = new_relocs_count; | |
8878 | elf_section_data (sec)->relocs = new_relocs; | |
8879 | sec->reloc_count++; | |
8880 | relax_info->relocs_count = sec->reloc_count; | |
8881 | *internal_relocs_p = new_relocs; | |
8882 | } | |
8883 | else | |
8884 | { | |
8885 | if (insert_at != sec->reloc_count) | |
8886 | { | |
8887 | unsigned idx; | |
8888 | for (idx = sec->reloc_count; idx > insert_at; idx--) | |
8889 | (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1]; | |
8890 | } | |
8891 | (*internal_relocs_p)[insert_at] = this_rela; | |
8892 | sec->reloc_count++; | |
8893 | if (relax_info->allocated_relocs) | |
8894 | relax_info->relocs_count = sec->reloc_count; | |
8895 | } | |
8896 | } | |
8897 | return TRUE; | |
8898 | } | |
8899 | ||
8900 | ||
e0001a05 NC |
8901 | /* This is similar to relax_section except that when a target is moved, |
8902 | we shift addresses up. We also need to modify the size. This | |
8903 | algorithm does NOT allow for relocations into the middle of the | |
8904 | property sections. */ | |
8905 | ||
43cd72b9 | 8906 | static bfd_boolean |
7fa3d080 BW |
8907 | relax_property_section (bfd *abfd, |
8908 | asection *sec, | |
8909 | struct bfd_link_info *link_info) | |
e0001a05 NC |
8910 | { |
8911 | Elf_Internal_Rela *internal_relocs; | |
8912 | bfd_byte *contents; | |
1d25768e | 8913 | unsigned i; |
e0001a05 | 8914 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
8915 | bfd_boolean is_full_prop_section; |
8916 | size_t last_zfill_target_offset = 0; | |
8917 | asection *last_zfill_target_sec = NULL; | |
8918 | bfd_size_type sec_size; | |
1d25768e | 8919 | bfd_size_type entry_size; |
e0001a05 | 8920 | |
43cd72b9 | 8921 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8922 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8923 | link_info->keep_memory); | |
8924 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 8925 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
8926 | { |
8927 | ok = FALSE; | |
8928 | goto error_return; | |
8929 | } | |
8930 | ||
1d25768e BW |
8931 | is_full_prop_section = xtensa_is_proptable_section (sec); |
8932 | if (is_full_prop_section) | |
8933 | entry_size = 12; | |
8934 | else | |
8935 | entry_size = 8; | |
43cd72b9 BW |
8936 | |
8937 | if (internal_relocs) | |
e0001a05 | 8938 | { |
43cd72b9 | 8939 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
8940 | { |
8941 | Elf_Internal_Rela *irel; | |
8942 | xtensa_relax_info *target_relax_info; | |
e0001a05 NC |
8943 | unsigned r_type; |
8944 | asection *target_sec; | |
43cd72b9 BW |
8945 | literal_value val; |
8946 | bfd_byte *size_p, *flags_p; | |
e0001a05 NC |
8947 | |
8948 | /* Locally change the source address. | |
8949 | Translate the target to the new target address. | |
8950 | If it points to this section and has been removed, MOVE IT. | |
8951 | Also, don't forget to modify the associated SIZE at | |
8952 | (offset + 4). */ | |
8953 | ||
8954 | irel = &internal_relocs[i]; | |
8955 | r_type = ELF32_R_TYPE (irel->r_info); | |
8956 | if (r_type == R_XTENSA_NONE) | |
8957 | continue; | |
8958 | ||
43cd72b9 BW |
8959 | /* Find the literal value. */ |
8960 | r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size); | |
8961 | size_p = &contents[irel->r_offset + 4]; | |
8962 | flags_p = NULL; | |
8963 | if (is_full_prop_section) | |
1d25768e BW |
8964 | flags_p = &contents[irel->r_offset + 8]; |
8965 | BFD_ASSERT (irel->r_offset + entry_size <= sec_size); | |
e0001a05 | 8966 | |
43cd72b9 | 8967 | target_sec = r_reloc_get_section (&val.r_rel); |
e0001a05 NC |
8968 | target_relax_info = get_xtensa_relax_info (target_sec); |
8969 | ||
8970 | if (target_relax_info | |
43cd72b9 BW |
8971 | && (target_relax_info->is_relaxable_literal_section |
8972 | || target_relax_info->is_relaxable_asm_section )) | |
e0001a05 NC |
8973 | { |
8974 | /* Translate the relocation's destination. */ | |
03669f1c BW |
8975 | bfd_vma old_offset = val.r_rel.target_offset; |
8976 | bfd_vma new_offset; | |
e0001a05 | 8977 | long old_size, new_size; |
03669f1c BW |
8978 | text_action *act = target_relax_info->action_list.head; |
8979 | new_offset = old_offset - | |
8980 | removed_by_actions (&act, old_offset, FALSE); | |
e0001a05 NC |
8981 | |
8982 | /* Assert that we are not out of bounds. */ | |
43cd72b9 | 8983 | old_size = bfd_get_32 (abfd, size_p); |
03669f1c | 8984 | new_size = old_size; |
43cd72b9 BW |
8985 | |
8986 | if (old_size == 0) | |
8987 | { | |
8988 | /* Only the first zero-sized unreachable entry is | |
8989 | allowed to expand. In this case the new offset | |
8990 | should be the offset before the fill and the new | |
8991 | size is the expansion size. For other zero-sized | |
8992 | entries the resulting size should be zero with an | |
8993 | offset before or after the fill address depending | |
8994 | on whether the expanding unreachable entry | |
8995 | preceeds it. */ | |
03669f1c BW |
8996 | if (last_zfill_target_sec == 0 |
8997 | || last_zfill_target_sec != target_sec | |
8998 | || last_zfill_target_offset != old_offset) | |
43cd72b9 | 8999 | { |
03669f1c BW |
9000 | bfd_vma new_end_offset = new_offset; |
9001 | ||
9002 | /* Recompute the new_offset, but this time don't | |
9003 | include any fill inserted by relaxation. */ | |
9004 | act = target_relax_info->action_list.head; | |
9005 | new_offset = old_offset - | |
9006 | removed_by_actions (&act, old_offset, TRUE); | |
43cd72b9 BW |
9007 | |
9008 | /* If it is not unreachable and we have not yet | |
9009 | seen an unreachable at this address, place it | |
9010 | before the fill address. */ | |
03669f1c BW |
9011 | if (flags_p && (bfd_get_32 (abfd, flags_p) |
9012 | & XTENSA_PROP_UNREACHABLE) != 0) | |
43cd72b9 | 9013 | { |
03669f1c BW |
9014 | new_size = new_end_offset - new_offset; |
9015 | ||
43cd72b9 | 9016 | last_zfill_target_sec = target_sec; |
03669f1c | 9017 | last_zfill_target_offset = old_offset; |
43cd72b9 BW |
9018 | } |
9019 | } | |
9020 | } | |
9021 | else | |
03669f1c BW |
9022 | new_size -= |
9023 | removed_by_actions (&act, old_offset + old_size, TRUE); | |
43cd72b9 | 9024 | |
e0001a05 NC |
9025 | if (new_size != old_size) |
9026 | { | |
9027 | bfd_put_32 (abfd, new_size, size_p); | |
9028 | pin_contents (sec, contents); | |
9029 | } | |
43cd72b9 | 9030 | |
03669f1c | 9031 | if (new_offset != old_offset) |
e0001a05 | 9032 | { |
03669f1c | 9033 | bfd_vma diff = new_offset - old_offset; |
e0001a05 NC |
9034 | irel->r_addend += diff; |
9035 | pin_internal_relocs (sec, internal_relocs); | |
9036 | } | |
9037 | } | |
9038 | } | |
9039 | } | |
9040 | ||
9041 | /* Combine adjacent property table entries. This is also done in | |
9042 | finish_dynamic_sections() but at that point it's too late to | |
9043 | reclaim the space in the output section, so we do this twice. */ | |
9044 | ||
43cd72b9 | 9045 | if (internal_relocs && (!link_info->relocatable |
1d25768e | 9046 | || xtensa_is_littable_section (sec))) |
e0001a05 NC |
9047 | { |
9048 | Elf_Internal_Rela *last_irel = NULL; | |
1d25768e | 9049 | Elf_Internal_Rela *irel, *next_rel, *rel_end; |
e0001a05 | 9050 | int removed_bytes = 0; |
1d25768e | 9051 | bfd_vma offset; |
e0001a05 | 9052 | bfd_vma section_size; |
43cd72b9 BW |
9053 | flagword predef_flags; |
9054 | ||
43cd72b9 | 9055 | predef_flags = xtensa_get_property_predef_flags (sec); |
e0001a05 | 9056 | |
1d25768e | 9057 | /* Walk over memory and relocations at the same time. |
e0001a05 NC |
9058 | This REQUIRES that the internal_relocs be sorted by offset. */ |
9059 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
9060 | internal_reloc_compare); | |
e0001a05 NC |
9061 | |
9062 | pin_internal_relocs (sec, internal_relocs); | |
9063 | pin_contents (sec, contents); | |
9064 | ||
1d25768e BW |
9065 | next_rel = internal_relocs; |
9066 | rel_end = internal_relocs + sec->reloc_count; | |
9067 | ||
eea6121a | 9068 | section_size = sec->size; |
43cd72b9 | 9069 | BFD_ASSERT (section_size % entry_size == 0); |
e0001a05 | 9070 | |
43cd72b9 | 9071 | for (offset = 0; offset < section_size; offset += entry_size) |
e0001a05 | 9072 | { |
1d25768e | 9073 | Elf_Internal_Rela *offset_rel, *extra_rel; |
e0001a05 | 9074 | bfd_vma bytes_to_remove, size, actual_offset; |
1d25768e | 9075 | bfd_boolean remove_this_rel; |
43cd72b9 | 9076 | flagword flags; |
e0001a05 | 9077 | |
1d25768e BW |
9078 | /* Find the first relocation for the entry at the current offset. |
9079 | Adjust the offsets of any extra relocations for the previous | |
9080 | entry. */ | |
9081 | offset_rel = NULL; | |
9082 | if (next_rel) | |
9083 | { | |
9084 | for (irel = next_rel; irel < rel_end; irel++) | |
9085 | { | |
9086 | if ((irel->r_offset == offset | |
9087 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) | |
9088 | || irel->r_offset > offset) | |
9089 | { | |
9090 | offset_rel = irel; | |
9091 | break; | |
9092 | } | |
9093 | irel->r_offset -= removed_bytes; | |
1d25768e BW |
9094 | } |
9095 | } | |
e0001a05 | 9096 | |
1d25768e BW |
9097 | /* Find the next relocation (if there are any left). */ |
9098 | extra_rel = NULL; | |
9099 | if (offset_rel) | |
e0001a05 | 9100 | { |
1d25768e | 9101 | for (irel = offset_rel + 1; irel < rel_end; irel++) |
e0001a05 | 9102 | { |
1d25768e BW |
9103 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) |
9104 | { | |
9105 | extra_rel = irel; | |
9106 | break; | |
9107 | } | |
e0001a05 | 9108 | } |
e0001a05 NC |
9109 | } |
9110 | ||
1d25768e BW |
9111 | /* Check if there are relocations on the current entry. There |
9112 | should usually be a relocation on the offset field. If there | |
9113 | are relocations on the size or flags, then we can't optimize | |
9114 | this entry. Also, find the next relocation to examine on the | |
9115 | next iteration. */ | |
9116 | if (offset_rel) | |
e0001a05 | 9117 | { |
1d25768e | 9118 | if (offset_rel->r_offset >= offset + entry_size) |
e0001a05 | 9119 | { |
1d25768e BW |
9120 | next_rel = offset_rel; |
9121 | /* There are no relocations on the current entry, but we | |
9122 | might still be able to remove it if the size is zero. */ | |
9123 | offset_rel = NULL; | |
9124 | } | |
9125 | else if (offset_rel->r_offset > offset | |
9126 | || (extra_rel | |
9127 | && extra_rel->r_offset < offset + entry_size)) | |
9128 | { | |
9129 | /* There is a relocation on the size or flags, so we can't | |
9130 | do anything with this entry. Continue with the next. */ | |
9131 | next_rel = offset_rel; | |
9132 | continue; | |
9133 | } | |
9134 | else | |
9135 | { | |
9136 | BFD_ASSERT (offset_rel->r_offset == offset); | |
9137 | offset_rel->r_offset -= removed_bytes; | |
9138 | next_rel = offset_rel + 1; | |
e0001a05 | 9139 | } |
e0001a05 | 9140 | } |
1d25768e BW |
9141 | else |
9142 | next_rel = NULL; | |
e0001a05 | 9143 | |
1d25768e | 9144 | remove_this_rel = FALSE; |
e0001a05 NC |
9145 | bytes_to_remove = 0; |
9146 | actual_offset = offset - removed_bytes; | |
9147 | size = bfd_get_32 (abfd, &contents[actual_offset + 4]); | |
9148 | ||
43cd72b9 BW |
9149 | if (is_full_prop_section) |
9150 | flags = bfd_get_32 (abfd, &contents[actual_offset + 8]); | |
9151 | else | |
9152 | flags = predef_flags; | |
9153 | ||
1d25768e BW |
9154 | if (size == 0 |
9155 | && (flags & XTENSA_PROP_ALIGN) == 0 | |
9156 | && (flags & XTENSA_PROP_UNREACHABLE) == 0) | |
e0001a05 | 9157 | { |
43cd72b9 BW |
9158 | /* Always remove entries with zero size and no alignment. */ |
9159 | bytes_to_remove = entry_size; | |
1d25768e BW |
9160 | if (offset_rel) |
9161 | remove_this_rel = TRUE; | |
e0001a05 | 9162 | } |
1d25768e BW |
9163 | else if (offset_rel |
9164 | && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32) | |
e0001a05 | 9165 | { |
1d25768e | 9166 | if (last_irel) |
e0001a05 | 9167 | { |
1d25768e BW |
9168 | flagword old_flags; |
9169 | bfd_vma old_size = | |
9170 | bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]); | |
9171 | bfd_vma old_address = | |
9172 | (last_irel->r_addend | |
9173 | + bfd_get_32 (abfd, &contents[last_irel->r_offset])); | |
9174 | bfd_vma new_address = | |
9175 | (offset_rel->r_addend | |
9176 | + bfd_get_32 (abfd, &contents[actual_offset])); | |
9177 | if (is_full_prop_section) | |
9178 | old_flags = bfd_get_32 | |
9179 | (abfd, &contents[last_irel->r_offset + 8]); | |
9180 | else | |
9181 | old_flags = predef_flags; | |
9182 | ||
9183 | if ((ELF32_R_SYM (offset_rel->r_info) | |
9184 | == ELF32_R_SYM (last_irel->r_info)) | |
9185 | && old_address + old_size == new_address | |
9186 | && old_flags == flags | |
9187 | && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0 | |
9188 | && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0) | |
e0001a05 | 9189 | { |
1d25768e BW |
9190 | /* Fix the old size. */ |
9191 | bfd_put_32 (abfd, old_size + size, | |
9192 | &contents[last_irel->r_offset + 4]); | |
9193 | bytes_to_remove = entry_size; | |
9194 | remove_this_rel = TRUE; | |
e0001a05 NC |
9195 | } |
9196 | else | |
1d25768e | 9197 | last_irel = offset_rel; |
e0001a05 | 9198 | } |
1d25768e BW |
9199 | else |
9200 | last_irel = offset_rel; | |
e0001a05 NC |
9201 | } |
9202 | ||
1d25768e | 9203 | if (remove_this_rel) |
e0001a05 | 9204 | { |
1d25768e BW |
9205 | offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); |
9206 | /* In case this is the last entry, move the relocation offset | |
9207 | to the previous entry, if there is one. */ | |
9208 | if (offset_rel->r_offset >= bytes_to_remove) | |
9209 | offset_rel->r_offset -= bytes_to_remove; | |
9210 | else | |
9211 | offset_rel->r_offset = 0; | |
e0001a05 NC |
9212 | } |
9213 | ||
9214 | if (bytes_to_remove != 0) | |
9215 | { | |
9216 | removed_bytes += bytes_to_remove; | |
43cd72b9 | 9217 | if (offset + bytes_to_remove < section_size) |
e0001a05 | 9218 | memmove (&contents[actual_offset], |
43cd72b9 BW |
9219 | &contents[actual_offset + bytes_to_remove], |
9220 | section_size - offset - bytes_to_remove); | |
e0001a05 NC |
9221 | } |
9222 | } | |
9223 | ||
43cd72b9 | 9224 | if (removed_bytes) |
e0001a05 | 9225 | { |
1d25768e BW |
9226 | /* Fix up any extra relocations on the last entry. */ |
9227 | for (irel = next_rel; irel < rel_end; irel++) | |
9228 | irel->r_offset -= removed_bytes; | |
9229 | ||
e0001a05 NC |
9230 | /* Clear the removed bytes. */ |
9231 | memset (&contents[section_size - removed_bytes], 0, removed_bytes); | |
9232 | ||
eea6121a | 9233 | sec->size = section_size - removed_bytes; |
e901de89 BW |
9234 | |
9235 | if (xtensa_is_littable_section (sec)) | |
9236 | { | |
f0e6fdb2 BW |
9237 | asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc; |
9238 | if (sgotloc) | |
9239 | sgotloc->size -= removed_bytes; | |
e901de89 | 9240 | } |
e0001a05 NC |
9241 | } |
9242 | } | |
e901de89 | 9243 | |
e0001a05 NC |
9244 | error_return: |
9245 | release_internal_relocs (sec, internal_relocs); | |
9246 | release_contents (sec, contents); | |
9247 | return ok; | |
9248 | } | |
9249 | ||
9250 | \f | |
9251 | /* Third relaxation pass. */ | |
9252 | ||
9253 | /* Change symbol values to account for removed literals. */ | |
9254 | ||
43cd72b9 | 9255 | bfd_boolean |
7fa3d080 | 9256 | relax_section_symbols (bfd *abfd, asection *sec) |
e0001a05 NC |
9257 | { |
9258 | xtensa_relax_info *relax_info; | |
9259 | unsigned int sec_shndx; | |
9260 | Elf_Internal_Shdr *symtab_hdr; | |
9261 | Elf_Internal_Sym *isymbuf; | |
9262 | unsigned i, num_syms, num_locals; | |
9263 | ||
9264 | relax_info = get_xtensa_relax_info (sec); | |
9265 | BFD_ASSERT (relax_info); | |
9266 | ||
43cd72b9 BW |
9267 | if (!relax_info->is_relaxable_literal_section |
9268 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
9269 | return TRUE; |
9270 | ||
9271 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
9272 | ||
9273 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9274 | isymbuf = retrieve_local_syms (abfd); | |
9275 | ||
9276 | num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
9277 | num_locals = symtab_hdr->sh_info; | |
9278 | ||
9279 | /* Adjust the local symbols defined in this section. */ | |
9280 | for (i = 0; i < num_locals; i++) | |
9281 | { | |
9282 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
9283 | ||
9284 | if (isym->st_shndx == sec_shndx) | |
9285 | { | |
03669f1c BW |
9286 | text_action *act = relax_info->action_list.head; |
9287 | bfd_vma orig_addr = isym->st_value; | |
43cd72b9 | 9288 | |
03669f1c | 9289 | isym->st_value -= removed_by_actions (&act, orig_addr, FALSE); |
43cd72b9 | 9290 | |
03669f1c BW |
9291 | if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC) |
9292 | isym->st_size -= | |
9293 | removed_by_actions (&act, orig_addr + isym->st_size, FALSE); | |
e0001a05 NC |
9294 | } |
9295 | } | |
9296 | ||
9297 | /* Now adjust the global symbols defined in this section. */ | |
9298 | for (i = 0; i < (num_syms - num_locals); i++) | |
9299 | { | |
9300 | struct elf_link_hash_entry *sym_hash; | |
9301 | ||
9302 | sym_hash = elf_sym_hashes (abfd)[i]; | |
9303 | ||
9304 | if (sym_hash->root.type == bfd_link_hash_warning) | |
9305 | sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link; | |
9306 | ||
9307 | if ((sym_hash->root.type == bfd_link_hash_defined | |
9308 | || sym_hash->root.type == bfd_link_hash_defweak) | |
9309 | && sym_hash->root.u.def.section == sec) | |
9310 | { | |
03669f1c BW |
9311 | text_action *act = relax_info->action_list.head; |
9312 | bfd_vma orig_addr = sym_hash->root.u.def.value; | |
43cd72b9 | 9313 | |
03669f1c BW |
9314 | sym_hash->root.u.def.value -= |
9315 | removed_by_actions (&act, orig_addr, FALSE); | |
43cd72b9 | 9316 | |
03669f1c BW |
9317 | if (sym_hash->type == STT_FUNC) |
9318 | sym_hash->size -= | |
9319 | removed_by_actions (&act, orig_addr + sym_hash->size, FALSE); | |
e0001a05 NC |
9320 | } |
9321 | } | |
9322 | ||
9323 | return TRUE; | |
9324 | } | |
9325 | ||
9326 | \f | |
9327 | /* "Fix" handling functions, called while performing relocations. */ | |
9328 | ||
43cd72b9 | 9329 | static bfd_boolean |
7fa3d080 BW |
9330 | do_fix_for_relocatable_link (Elf_Internal_Rela *rel, |
9331 | bfd *input_bfd, | |
9332 | asection *input_section, | |
9333 | bfd_byte *contents) | |
e0001a05 NC |
9334 | { |
9335 | r_reloc r_rel; | |
9336 | asection *sec, *old_sec; | |
9337 | bfd_vma old_offset; | |
9338 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 NC |
9339 | reloc_bfd_fix *fix; |
9340 | ||
9341 | if (r_type == R_XTENSA_NONE) | |
43cd72b9 | 9342 | return TRUE; |
e0001a05 | 9343 | |
43cd72b9 BW |
9344 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
9345 | if (!fix) | |
9346 | return TRUE; | |
e0001a05 | 9347 | |
43cd72b9 BW |
9348 | r_reloc_init (&r_rel, input_bfd, rel, contents, |
9349 | bfd_get_section_limit (input_bfd, input_section)); | |
e0001a05 | 9350 | old_sec = r_reloc_get_section (&r_rel); |
43cd72b9 BW |
9351 | old_offset = r_rel.target_offset; |
9352 | ||
9353 | if (!old_sec || !r_reloc_is_defined (&r_rel)) | |
e0001a05 | 9354 | { |
43cd72b9 BW |
9355 | if (r_type != R_XTENSA_ASM_EXPAND) |
9356 | { | |
9357 | (*_bfd_error_handler) | |
9358 | (_("%B(%A+0x%lx): unexpected fix for %s relocation"), | |
9359 | input_bfd, input_section, rel->r_offset, | |
9360 | elf_howto_table[r_type].name); | |
9361 | return FALSE; | |
9362 | } | |
e0001a05 NC |
9363 | /* Leave it be. Resolution will happen in a later stage. */ |
9364 | } | |
9365 | else | |
9366 | { | |
9367 | sec = fix->target_sec; | |
9368 | rel->r_addend += ((sec->output_offset + fix->target_offset) | |
9369 | - (old_sec->output_offset + old_offset)); | |
9370 | } | |
43cd72b9 | 9371 | return TRUE; |
e0001a05 NC |
9372 | } |
9373 | ||
9374 | ||
9375 | static void | |
7fa3d080 BW |
9376 | do_fix_for_final_link (Elf_Internal_Rela *rel, |
9377 | bfd *input_bfd, | |
9378 | asection *input_section, | |
9379 | bfd_byte *contents, | |
9380 | bfd_vma *relocationp) | |
e0001a05 NC |
9381 | { |
9382 | asection *sec; | |
9383 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 | 9384 | reloc_bfd_fix *fix; |
43cd72b9 | 9385 | bfd_vma fixup_diff; |
e0001a05 NC |
9386 | |
9387 | if (r_type == R_XTENSA_NONE) | |
9388 | return; | |
9389 | ||
43cd72b9 BW |
9390 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
9391 | if (!fix) | |
e0001a05 NC |
9392 | return; |
9393 | ||
9394 | sec = fix->target_sec; | |
43cd72b9 BW |
9395 | |
9396 | fixup_diff = rel->r_addend; | |
9397 | if (elf_howto_table[fix->src_type].partial_inplace) | |
9398 | { | |
9399 | bfd_vma inplace_val; | |
9400 | BFD_ASSERT (fix->src_offset | |
9401 | < bfd_get_section_limit (input_bfd, input_section)); | |
9402 | inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]); | |
9403 | fixup_diff += inplace_val; | |
9404 | } | |
9405 | ||
e0001a05 NC |
9406 | *relocationp = (sec->output_section->vma |
9407 | + sec->output_offset | |
43cd72b9 | 9408 | + fix->target_offset - fixup_diff); |
e0001a05 NC |
9409 | } |
9410 | ||
9411 | \f | |
9412 | /* Miscellaneous utility functions.... */ | |
9413 | ||
9414 | static asection * | |
f0e6fdb2 | 9415 | elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 9416 | { |
f0e6fdb2 BW |
9417 | struct elf_xtensa_link_hash_table *htab; |
9418 | bfd *dynobj; | |
e0001a05 NC |
9419 | char plt_name[10]; |
9420 | ||
9421 | if (chunk == 0) | |
f0e6fdb2 BW |
9422 | { |
9423 | htab = elf_xtensa_hash_table (info); | |
9424 | return htab->splt; | |
9425 | } | |
e0001a05 | 9426 | |
f0e6fdb2 | 9427 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
9428 | sprintf (plt_name, ".plt.%u", chunk); |
9429 | return bfd_get_section_by_name (dynobj, plt_name); | |
9430 | } | |
9431 | ||
9432 | ||
9433 | static asection * | |
f0e6fdb2 | 9434 | elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 9435 | { |
f0e6fdb2 BW |
9436 | struct elf_xtensa_link_hash_table *htab; |
9437 | bfd *dynobj; | |
e0001a05 NC |
9438 | char got_name[14]; |
9439 | ||
9440 | if (chunk == 0) | |
f0e6fdb2 BW |
9441 | { |
9442 | htab = elf_xtensa_hash_table (info); | |
9443 | return htab->sgotplt; | |
9444 | } | |
e0001a05 | 9445 | |
f0e6fdb2 | 9446 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
9447 | sprintf (got_name, ".got.plt.%u", chunk); |
9448 | return bfd_get_section_by_name (dynobj, got_name); | |
9449 | } | |
9450 | ||
9451 | ||
9452 | /* Get the input section for a given symbol index. | |
9453 | If the symbol is: | |
9454 | . a section symbol, return the section; | |
9455 | . a common symbol, return the common section; | |
9456 | . an undefined symbol, return the undefined section; | |
9457 | . an indirect symbol, follow the links; | |
9458 | . an absolute value, return the absolute section. */ | |
9459 | ||
9460 | static asection * | |
7fa3d080 | 9461 | get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9462 | { |
9463 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9464 | asection *target_sec = NULL; | |
43cd72b9 | 9465 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
9466 | { |
9467 | Elf_Internal_Sym *isymbuf; | |
9468 | unsigned int section_index; | |
9469 | ||
9470 | isymbuf = retrieve_local_syms (abfd); | |
9471 | section_index = isymbuf[r_symndx].st_shndx; | |
9472 | ||
9473 | if (section_index == SHN_UNDEF) | |
9474 | target_sec = bfd_und_section_ptr; | |
9475 | else if (section_index > 0 && section_index < SHN_LORESERVE) | |
9476 | target_sec = bfd_section_from_elf_index (abfd, section_index); | |
9477 | else if (section_index == SHN_ABS) | |
9478 | target_sec = bfd_abs_section_ptr; | |
9479 | else if (section_index == SHN_COMMON) | |
9480 | target_sec = bfd_com_section_ptr; | |
43cd72b9 | 9481 | else |
e0001a05 NC |
9482 | /* Who knows? */ |
9483 | target_sec = NULL; | |
9484 | } | |
9485 | else | |
9486 | { | |
9487 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
9488 | struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx]; | |
9489 | ||
9490 | while (h->root.type == bfd_link_hash_indirect | |
9491 | || h->root.type == bfd_link_hash_warning) | |
9492 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9493 | ||
9494 | switch (h->root.type) | |
9495 | { | |
9496 | case bfd_link_hash_defined: | |
9497 | case bfd_link_hash_defweak: | |
9498 | target_sec = h->root.u.def.section; | |
9499 | break; | |
9500 | case bfd_link_hash_common: | |
9501 | target_sec = bfd_com_section_ptr; | |
9502 | break; | |
9503 | case bfd_link_hash_undefined: | |
9504 | case bfd_link_hash_undefweak: | |
9505 | target_sec = bfd_und_section_ptr; | |
9506 | break; | |
9507 | default: /* New indirect warning. */ | |
9508 | target_sec = bfd_und_section_ptr; | |
9509 | break; | |
9510 | } | |
9511 | } | |
9512 | return target_sec; | |
9513 | } | |
9514 | ||
9515 | ||
9516 | static struct elf_link_hash_entry * | |
7fa3d080 | 9517 | get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9518 | { |
9519 | unsigned long indx; | |
9520 | struct elf_link_hash_entry *h; | |
9521 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9522 | ||
9523 | if (r_symndx < symtab_hdr->sh_info) | |
9524 | return NULL; | |
43cd72b9 | 9525 | |
e0001a05 NC |
9526 | indx = r_symndx - symtab_hdr->sh_info; |
9527 | h = elf_sym_hashes (abfd)[indx]; | |
9528 | while (h->root.type == bfd_link_hash_indirect | |
9529 | || h->root.type == bfd_link_hash_warning) | |
9530 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9531 | return h; | |
9532 | } | |
9533 | ||
9534 | ||
9535 | /* Get the section-relative offset for a symbol number. */ | |
9536 | ||
9537 | static bfd_vma | |
7fa3d080 | 9538 | get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9539 | { |
9540 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9541 | bfd_vma offset = 0; | |
9542 | ||
43cd72b9 | 9543 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
9544 | { |
9545 | Elf_Internal_Sym *isymbuf; | |
9546 | isymbuf = retrieve_local_syms (abfd); | |
9547 | offset = isymbuf[r_symndx].st_value; | |
9548 | } | |
9549 | else | |
9550 | { | |
9551 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
9552 | struct elf_link_hash_entry *h = | |
9553 | elf_sym_hashes (abfd)[indx]; | |
9554 | ||
9555 | while (h->root.type == bfd_link_hash_indirect | |
9556 | || h->root.type == bfd_link_hash_warning) | |
9557 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9558 | if (h->root.type == bfd_link_hash_defined | |
9559 | || h->root.type == bfd_link_hash_defweak) | |
9560 | offset = h->root.u.def.value; | |
9561 | } | |
9562 | return offset; | |
9563 | } | |
9564 | ||
9565 | ||
9566 | static bfd_boolean | |
7fa3d080 | 9567 | is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel) |
43cd72b9 BW |
9568 | { |
9569 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
9570 | struct elf_link_hash_entry *h; | |
9571 | ||
9572 | h = get_elf_r_symndx_hash_entry (abfd, r_symndx); | |
9573 | if (h && h->root.type == bfd_link_hash_defweak) | |
9574 | return TRUE; | |
9575 | return FALSE; | |
9576 | } | |
9577 | ||
9578 | ||
9579 | static bfd_boolean | |
7fa3d080 BW |
9580 | pcrel_reloc_fits (xtensa_opcode opc, |
9581 | int opnd, | |
9582 | bfd_vma self_address, | |
9583 | bfd_vma dest_address) | |
e0001a05 | 9584 | { |
43cd72b9 BW |
9585 | xtensa_isa isa = xtensa_default_isa; |
9586 | uint32 valp = dest_address; | |
9587 | if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address) | |
9588 | || xtensa_operand_encode (isa, opc, opnd, &valp)) | |
9589 | return FALSE; | |
9590 | return TRUE; | |
e0001a05 NC |
9591 | } |
9592 | ||
9593 | ||
9594 | static bfd_boolean | |
7fa3d080 | 9595 | xtensa_is_property_section (asection *sec) |
e0001a05 | 9596 | { |
1d25768e BW |
9597 | if (xtensa_is_insntable_section (sec) |
9598 | || xtensa_is_littable_section (sec) | |
9599 | || xtensa_is_proptable_section (sec)) | |
b614a702 | 9600 | return TRUE; |
e901de89 | 9601 | |
1d25768e BW |
9602 | return FALSE; |
9603 | } | |
9604 | ||
9605 | ||
9606 | static bfd_boolean | |
9607 | xtensa_is_insntable_section (asection *sec) | |
9608 | { | |
9609 | if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME) | |
9610 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.x.")) | |
e901de89 BW |
9611 | return TRUE; |
9612 | ||
e901de89 BW |
9613 | return FALSE; |
9614 | } | |
9615 | ||
9616 | ||
9617 | static bfd_boolean | |
7fa3d080 | 9618 | xtensa_is_littable_section (asection *sec) |
e901de89 | 9619 | { |
1d25768e BW |
9620 | if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME) |
9621 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.p.")) | |
b614a702 | 9622 | return TRUE; |
e901de89 | 9623 | |
1d25768e BW |
9624 | return FALSE; |
9625 | } | |
9626 | ||
9627 | ||
9628 | static bfd_boolean | |
9629 | xtensa_is_proptable_section (asection *sec) | |
9630 | { | |
9631 | if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME) | |
9632 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop.")) | |
e901de89 | 9633 | return TRUE; |
e0001a05 | 9634 | |
e901de89 | 9635 | return FALSE; |
e0001a05 NC |
9636 | } |
9637 | ||
9638 | ||
43cd72b9 | 9639 | static int |
7fa3d080 | 9640 | internal_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 9641 | { |
43cd72b9 BW |
9642 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; |
9643 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
9644 | ||
9645 | if (a->r_offset != b->r_offset) | |
9646 | return (a->r_offset - b->r_offset); | |
9647 | ||
9648 | /* We don't need to sort on these criteria for correctness, | |
9649 | but enforcing a more strict ordering prevents unstable qsort | |
9650 | from behaving differently with different implementations. | |
9651 | Without the code below we get correct but different results | |
9652 | on Solaris 2.7 and 2.8. We would like to always produce the | |
9653 | same results no matter the host. */ | |
9654 | ||
9655 | if (a->r_info != b->r_info) | |
9656 | return (a->r_info - b->r_info); | |
9657 | ||
9658 | return (a->r_addend - b->r_addend); | |
e0001a05 NC |
9659 | } |
9660 | ||
9661 | ||
9662 | static int | |
7fa3d080 | 9663 | internal_reloc_matches (const void *ap, const void *bp) |
e0001a05 NC |
9664 | { |
9665 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; | |
9666 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
9667 | ||
43cd72b9 BW |
9668 | /* Check if one entry overlaps with the other; this shouldn't happen |
9669 | except when searching for a match. */ | |
e0001a05 NC |
9670 | return (a->r_offset - b->r_offset); |
9671 | } | |
9672 | ||
9673 | ||
74869ac7 BW |
9674 | /* Predicate function used to look up a section in a particular group. */ |
9675 | ||
9676 | static bfd_boolean | |
9677 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
9678 | { | |
9679 | const char *gname = inf; | |
9680 | const char *group_name = elf_group_name (sec); | |
9681 | ||
9682 | return (group_name == gname | |
9683 | || (group_name != NULL | |
9684 | && gname != NULL | |
9685 | && strcmp (group_name, gname) == 0)); | |
9686 | } | |
9687 | ||
9688 | ||
1d25768e BW |
9689 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
9690 | ||
74869ac7 BW |
9691 | asection * |
9692 | xtensa_get_property_section (asection *sec, const char *base_name) | |
e0001a05 | 9693 | { |
74869ac7 BW |
9694 | const char *suffix, *group_name; |
9695 | char *prop_sec_name; | |
9696 | asection *prop_sec; | |
9697 | ||
9698 | group_name = elf_group_name (sec); | |
9699 | if (group_name) | |
9700 | { | |
9701 | suffix = strrchr (sec->name, '.'); | |
9702 | if (suffix == sec->name) | |
9703 | suffix = 0; | |
9704 | prop_sec_name = (char *) bfd_malloc (strlen (base_name) + 1 | |
9705 | + (suffix ? strlen (suffix) : 0)); | |
9706 | strcpy (prop_sec_name, base_name); | |
9707 | if (suffix) | |
9708 | strcat (prop_sec_name, suffix); | |
9709 | } | |
9710 | else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0) | |
e0001a05 | 9711 | { |
43cd72b9 | 9712 | char *linkonce_kind = 0; |
b614a702 BW |
9713 | |
9714 | if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0) | |
7db48a12 | 9715 | linkonce_kind = "x."; |
b614a702 | 9716 | else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0) |
7db48a12 | 9717 | linkonce_kind = "p."; |
43cd72b9 BW |
9718 | else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0) |
9719 | linkonce_kind = "prop."; | |
e0001a05 | 9720 | else |
b614a702 BW |
9721 | abort (); |
9722 | ||
43cd72b9 BW |
9723 | prop_sec_name = (char *) bfd_malloc (strlen (sec->name) |
9724 | + strlen (linkonce_kind) + 1); | |
b614a702 | 9725 | memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len); |
43cd72b9 | 9726 | strcpy (prop_sec_name + linkonce_len, linkonce_kind); |
b614a702 BW |
9727 | |
9728 | suffix = sec->name + linkonce_len; | |
096c35a7 | 9729 | /* For backward compatibility, replace "t." instead of inserting |
43cd72b9 | 9730 | the new linkonce_kind (but not for "prop" sections). */ |
0112cd26 | 9731 | if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.') |
43cd72b9 BW |
9732 | suffix += 2; |
9733 | strcat (prop_sec_name + linkonce_len, suffix); | |
74869ac7 BW |
9734 | } |
9735 | else | |
9736 | prop_sec_name = strdup (base_name); | |
9737 | ||
9738 | /* Check if the section already exists. */ | |
9739 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, | |
9740 | match_section_group, | |
9741 | (void *) group_name); | |
9742 | /* If not, create it. */ | |
9743 | if (! prop_sec) | |
9744 | { | |
9745 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
9746 | flags |= (bfd_get_section_flags (sec->owner, sec) | |
9747 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)); | |
9748 | ||
9749 | prop_sec = bfd_make_section_anyway_with_flags | |
9750 | (sec->owner, strdup (prop_sec_name), flags); | |
9751 | if (! prop_sec) | |
9752 | return 0; | |
b614a702 | 9753 | |
74869ac7 | 9754 | elf_group_name (prop_sec) = group_name; |
e0001a05 NC |
9755 | } |
9756 | ||
74869ac7 BW |
9757 | free (prop_sec_name); |
9758 | return prop_sec; | |
e0001a05 NC |
9759 | } |
9760 | ||
43cd72b9 BW |
9761 | |
9762 | flagword | |
7fa3d080 | 9763 | xtensa_get_property_predef_flags (asection *sec) |
43cd72b9 | 9764 | { |
1d25768e | 9765 | if (xtensa_is_insntable_section (sec)) |
43cd72b9 | 9766 | return (XTENSA_PROP_INSN |
99ded152 | 9767 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
9768 | | XTENSA_PROP_INSN_NO_REORDER); |
9769 | ||
9770 | if (xtensa_is_littable_section (sec)) | |
9771 | return (XTENSA_PROP_LITERAL | |
99ded152 | 9772 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
9773 | | XTENSA_PROP_INSN_NO_REORDER); |
9774 | ||
9775 | return 0; | |
9776 | } | |
9777 | ||
e0001a05 NC |
9778 | \f |
9779 | /* Other functions called directly by the linker. */ | |
9780 | ||
9781 | bfd_boolean | |
7fa3d080 BW |
9782 | xtensa_callback_required_dependence (bfd *abfd, |
9783 | asection *sec, | |
9784 | struct bfd_link_info *link_info, | |
9785 | deps_callback_t callback, | |
9786 | void *closure) | |
e0001a05 NC |
9787 | { |
9788 | Elf_Internal_Rela *internal_relocs; | |
9789 | bfd_byte *contents; | |
9790 | unsigned i; | |
9791 | bfd_boolean ok = TRUE; | |
43cd72b9 BW |
9792 | bfd_size_type sec_size; |
9793 | ||
9794 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 NC |
9795 | |
9796 | /* ".plt*" sections have no explicit relocations but they contain L32R | |
9797 | instructions that reference the corresponding ".got.plt*" sections. */ | |
9798 | if ((sec->flags & SEC_LINKER_CREATED) != 0 | |
0112cd26 | 9799 | && CONST_STRNEQ (sec->name, ".plt")) |
e0001a05 NC |
9800 | { |
9801 | asection *sgotplt; | |
9802 | ||
9803 | /* Find the corresponding ".got.plt*" section. */ | |
9804 | if (sec->name[4] == '\0') | |
9805 | sgotplt = bfd_get_section_by_name (sec->owner, ".got.plt"); | |
9806 | else | |
9807 | { | |
9808 | char got_name[14]; | |
9809 | int chunk = 0; | |
9810 | ||
9811 | BFD_ASSERT (sec->name[4] == '.'); | |
9812 | chunk = strtol (&sec->name[5], NULL, 10); | |
9813 | ||
9814 | sprintf (got_name, ".got.plt.%u", chunk); | |
9815 | sgotplt = bfd_get_section_by_name (sec->owner, got_name); | |
9816 | } | |
9817 | BFD_ASSERT (sgotplt); | |
9818 | ||
9819 | /* Assume worst-case offsets: L32R at the very end of the ".plt" | |
9820 | section referencing a literal at the very beginning of | |
9821 | ".got.plt". This is very close to the real dependence, anyway. */ | |
43cd72b9 | 9822 | (*callback) (sec, sec_size, sgotplt, 0, closure); |
e0001a05 NC |
9823 | } |
9824 | ||
13161072 BW |
9825 | /* Only ELF files are supported for Xtensa. Check here to avoid a segfault |
9826 | when building uclibc, which runs "ld -b binary /dev/null". */ | |
9827 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
9828 | return ok; | |
9829 | ||
e0001a05 NC |
9830 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
9831 | link_info->keep_memory); | |
9832 | if (internal_relocs == NULL | |
43cd72b9 | 9833 | || sec->reloc_count == 0) |
e0001a05 NC |
9834 | return ok; |
9835 | ||
9836 | /* Cache the contents for the duration of this scan. */ | |
9837 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 9838 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
9839 | { |
9840 | ok = FALSE; | |
9841 | goto error_return; | |
9842 | } | |
9843 | ||
43cd72b9 BW |
9844 | if (!xtensa_default_isa) |
9845 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 9846 | |
43cd72b9 | 9847 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
9848 | { |
9849 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 | 9850 | if (is_l32r_relocation (abfd, sec, contents, irel)) |
e0001a05 NC |
9851 | { |
9852 | r_reloc l32r_rel; | |
9853 | asection *target_sec; | |
9854 | bfd_vma target_offset; | |
43cd72b9 BW |
9855 | |
9856 | r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size); | |
e0001a05 NC |
9857 | target_sec = NULL; |
9858 | target_offset = 0; | |
9859 | /* L32Rs must be local to the input file. */ | |
9860 | if (r_reloc_is_defined (&l32r_rel)) | |
9861 | { | |
9862 | target_sec = r_reloc_get_section (&l32r_rel); | |
43cd72b9 | 9863 | target_offset = l32r_rel.target_offset; |
e0001a05 NC |
9864 | } |
9865 | (*callback) (sec, irel->r_offset, target_sec, target_offset, | |
9866 | closure); | |
9867 | } | |
9868 | } | |
9869 | ||
9870 | error_return: | |
9871 | release_internal_relocs (sec, internal_relocs); | |
9872 | release_contents (sec, contents); | |
9873 | return ok; | |
9874 | } | |
9875 | ||
2f89ff8d L |
9876 | /* The default literal sections should always be marked as "code" (i.e., |
9877 | SHF_EXECINSTR). This is particularly important for the Linux kernel | |
9878 | module loader so that the literals are not placed after the text. */ | |
b35d266b | 9879 | static const struct bfd_elf_special_section elf_xtensa_special_sections[] = |
2f89ff8d | 9880 | { |
0112cd26 NC |
9881 | { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
9882 | { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
9883 | { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2caa7ca0 | 9884 | { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 }, |
0112cd26 | 9885 | { NULL, 0, 0, 0, 0 } |
7f4d3958 | 9886 | }; |
e0001a05 NC |
9887 | \f |
9888 | #ifndef ELF_ARCH | |
9889 | #define TARGET_LITTLE_SYM bfd_elf32_xtensa_le_vec | |
9890 | #define TARGET_LITTLE_NAME "elf32-xtensa-le" | |
9891 | #define TARGET_BIG_SYM bfd_elf32_xtensa_be_vec | |
9892 | #define TARGET_BIG_NAME "elf32-xtensa-be" | |
9893 | #define ELF_ARCH bfd_arch_xtensa | |
9894 | ||
4af0a1d8 BW |
9895 | #define ELF_MACHINE_CODE EM_XTENSA |
9896 | #define ELF_MACHINE_ALT1 EM_XTENSA_OLD | |
e0001a05 NC |
9897 | |
9898 | #if XCHAL_HAVE_MMU | |
9899 | #define ELF_MAXPAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE) | |
9900 | #else /* !XCHAL_HAVE_MMU */ | |
9901 | #define ELF_MAXPAGESIZE 1 | |
9902 | #endif /* !XCHAL_HAVE_MMU */ | |
9903 | #endif /* ELF_ARCH */ | |
9904 | ||
9905 | #define elf_backend_can_gc_sections 1 | |
9906 | #define elf_backend_can_refcount 1 | |
9907 | #define elf_backend_plt_readonly 1 | |
9908 | #define elf_backend_got_header_size 4 | |
9909 | #define elf_backend_want_dynbss 0 | |
9910 | #define elf_backend_want_got_plt 1 | |
9911 | ||
9912 | #define elf_info_to_howto elf_xtensa_info_to_howto_rela | |
9913 | ||
e0001a05 NC |
9914 | #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data |
9915 | #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook | |
9916 | #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data | |
9917 | #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section | |
9918 | #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup | |
157090f7 AM |
9919 | #define bfd_elf32_bfd_reloc_name_lookup \ |
9920 | elf_xtensa_reloc_name_lookup | |
e0001a05 | 9921 | #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags |
f0e6fdb2 | 9922 | #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create |
e0001a05 NC |
9923 | |
9924 | #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol | |
9925 | #define elf_backend_check_relocs elf_xtensa_check_relocs | |
e0001a05 NC |
9926 | #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections |
9927 | #define elf_backend_discard_info elf_xtensa_discard_info | |
9928 | #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs | |
9929 | #define elf_backend_final_write_processing elf_xtensa_final_write_processing | |
9930 | #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections | |
9931 | #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol | |
9932 | #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook | |
9933 | #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook | |
9934 | #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus | |
9935 | #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo | |
95147441 | 9936 | #define elf_backend_hide_symbol elf_xtensa_hide_symbol |
e0001a05 NC |
9937 | #define elf_backend_object_p elf_xtensa_object_p |
9938 | #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class | |
9939 | #define elf_backend_relocate_section elf_xtensa_relocate_section | |
9940 | #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections | |
74541ad4 AM |
9941 | #define elf_backend_omit_section_dynsym \ |
9942 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
29ef7005 | 9943 | #define elf_backend_special_sections elf_xtensa_special_sections |
a77dc2cc | 9944 | #define elf_backend_action_discarded elf_xtensa_action_discarded |
e0001a05 NC |
9945 | |
9946 | #include "elf32-target.h" |