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 | |
8 | published by the Free Software Foundation; either version 2 of the | |
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 NC |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
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 NC |
614 | bfd_size_type num_records; |
615 | Elf_Internal_Rela *internal_relocs; | |
3ba3bc8c | 616 | bfd_vma section_addr; |
43cd72b9 BW |
617 | flagword predef_flags; |
618 | bfd_size_type table_entry_size; | |
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 NC |
654 | /* If the file has not yet been relocated, process the relocations |
655 | and sort out the table entries that apply to the specified section. */ | |
656 | internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE); | |
3ba3bc8c | 657 | if (internal_relocs && !table_section->reloc_done) |
e0001a05 NC |
658 | { |
659 | unsigned i; | |
660 | ||
661 | for (i = 0; i < table_section->reloc_count; i++) | |
662 | { | |
663 | Elf_Internal_Rela *rel = &internal_relocs[i]; | |
664 | unsigned long r_symndx; | |
665 | ||
666 | if (ELF32_R_TYPE (rel->r_info) == R_XTENSA_NONE) | |
667 | continue; | |
668 | ||
669 | BFD_ASSERT (ELF32_R_TYPE (rel->r_info) == R_XTENSA_32); | |
670 | r_symndx = ELF32_R_SYM (rel->r_info); | |
671 | ||
672 | if (get_elf_r_symndx_section (abfd, r_symndx) == section) | |
673 | { | |
674 | bfd_vma sym_off = get_elf_r_symndx_offset (abfd, r_symndx); | |
43cd72b9 | 675 | BFD_ASSERT (sym_off == 0); |
e0001a05 | 676 | blocks[block_count].address = |
3ba3bc8c | 677 | (section_addr + sym_off + rel->r_addend |
e0001a05 NC |
678 | + bfd_get_32 (abfd, table_data + rel->r_offset)); |
679 | blocks[block_count].size = | |
680 | bfd_get_32 (abfd, table_data + rel->r_offset + 4); | |
43cd72b9 BW |
681 | if (predef_flags) |
682 | blocks[block_count].flags = predef_flags; | |
683 | else | |
684 | blocks[block_count].flags = | |
685 | bfd_get_32 (abfd, table_data + rel->r_offset + 8); | |
e0001a05 NC |
686 | block_count++; |
687 | } | |
688 | } | |
689 | } | |
690 | else | |
691 | { | |
3ba3bc8c BW |
692 | /* The file has already been relocated and the addresses are |
693 | already in the table. */ | |
e0001a05 | 694 | bfd_vma off; |
43cd72b9 | 695 | bfd_size_type section_limit = bfd_get_section_limit (abfd, section); |
e0001a05 | 696 | |
43cd72b9 | 697 | for (off = 0; off < table_size; off += table_entry_size) |
e0001a05 NC |
698 | { |
699 | bfd_vma address = bfd_get_32 (abfd, table_data + off); | |
700 | ||
3ba3bc8c | 701 | if (address >= section_addr |
43cd72b9 | 702 | && address < section_addr + section_limit) |
e0001a05 NC |
703 | { |
704 | blocks[block_count].address = address; | |
705 | blocks[block_count].size = | |
706 | bfd_get_32 (abfd, table_data + off + 4); | |
43cd72b9 BW |
707 | if (predef_flags) |
708 | blocks[block_count].flags = predef_flags; | |
709 | else | |
710 | blocks[block_count].flags = | |
711 | bfd_get_32 (abfd, table_data + off + 8); | |
e0001a05 NC |
712 | block_count++; |
713 | } | |
714 | } | |
715 | } | |
716 | ||
717 | release_contents (table_section, table_data); | |
718 | release_internal_relocs (table_section, internal_relocs); | |
719 | ||
43cd72b9 | 720 | if (block_count > 0) |
e0001a05 NC |
721 | { |
722 | /* Now sort them into address order for easy reference. */ | |
723 | qsort (blocks, block_count, sizeof (property_table_entry), | |
724 | property_table_compare); | |
e4115460 BW |
725 | |
726 | /* Check that the table contents are valid. Problems may occur, | |
727 | for example, if an unrelocated object file is stripped. */ | |
728 | for (blk = 1; blk < block_count; blk++) | |
729 | { | |
730 | /* The only circumstance where two entries may legitimately | |
731 | have the same address is when one of them is a zero-size | |
732 | placeholder to mark a place where fill can be inserted. | |
733 | The zero-size entry should come first. */ | |
734 | if (blocks[blk - 1].address == blocks[blk].address && | |
735 | blocks[blk - 1].size != 0) | |
736 | { | |
737 | (*_bfd_error_handler) (_("%B(%A): invalid property table"), | |
738 | abfd, section); | |
739 | bfd_set_error (bfd_error_bad_value); | |
740 | free (blocks); | |
741 | return -1; | |
742 | } | |
743 | } | |
e0001a05 | 744 | } |
43cd72b9 | 745 | |
e0001a05 NC |
746 | *table_p = blocks; |
747 | return block_count; | |
748 | } | |
749 | ||
750 | ||
7fa3d080 BW |
751 | static property_table_entry * |
752 | elf_xtensa_find_property_entry (property_table_entry *property_table, | |
753 | int property_table_size, | |
754 | bfd_vma addr) | |
e0001a05 NC |
755 | { |
756 | property_table_entry entry; | |
43cd72b9 | 757 | property_table_entry *rv; |
e0001a05 | 758 | |
43cd72b9 BW |
759 | if (property_table_size == 0) |
760 | return NULL; | |
e0001a05 NC |
761 | |
762 | entry.address = addr; | |
763 | entry.size = 1; | |
43cd72b9 | 764 | entry.flags = 0; |
e0001a05 | 765 | |
43cd72b9 BW |
766 | rv = bsearch (&entry, property_table, property_table_size, |
767 | sizeof (property_table_entry), property_table_matches); | |
768 | return rv; | |
769 | } | |
770 | ||
771 | ||
772 | static bfd_boolean | |
7fa3d080 BW |
773 | elf_xtensa_in_literal_pool (property_table_entry *lit_table, |
774 | int lit_table_size, | |
775 | bfd_vma addr) | |
43cd72b9 BW |
776 | { |
777 | if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr)) | |
e0001a05 NC |
778 | return TRUE; |
779 | ||
780 | return FALSE; | |
781 | } | |
782 | ||
783 | \f | |
784 | /* Look through the relocs for a section during the first phase, and | |
785 | calculate needed space in the dynamic reloc sections. */ | |
786 | ||
787 | static bfd_boolean | |
7fa3d080 BW |
788 | elf_xtensa_check_relocs (bfd *abfd, |
789 | struct bfd_link_info *info, | |
790 | asection *sec, | |
791 | const Elf_Internal_Rela *relocs) | |
e0001a05 | 792 | { |
f0e6fdb2 | 793 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
794 | Elf_Internal_Shdr *symtab_hdr; |
795 | struct elf_link_hash_entry **sym_hashes; | |
796 | const Elf_Internal_Rela *rel; | |
797 | const Elf_Internal_Rela *rel_end; | |
e0001a05 | 798 | |
1049f94e | 799 | if (info->relocatable) |
e0001a05 NC |
800 | return TRUE; |
801 | ||
f0e6fdb2 | 802 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
803 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
804 | sym_hashes = elf_sym_hashes (abfd); | |
805 | ||
e0001a05 NC |
806 | rel_end = relocs + sec->reloc_count; |
807 | for (rel = relocs; rel < rel_end; rel++) | |
808 | { | |
809 | unsigned int r_type; | |
810 | unsigned long r_symndx; | |
811 | struct elf_link_hash_entry *h; | |
812 | ||
813 | r_symndx = ELF32_R_SYM (rel->r_info); | |
814 | r_type = ELF32_R_TYPE (rel->r_info); | |
815 | ||
816 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
817 | { | |
d003868e AM |
818 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
819 | abfd, r_symndx); | |
e0001a05 NC |
820 | return FALSE; |
821 | } | |
822 | ||
823 | if (r_symndx < symtab_hdr->sh_info) | |
824 | h = NULL; | |
825 | else | |
826 | { | |
827 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
828 | while (h->root.type == bfd_link_hash_indirect | |
829 | || h->root.type == bfd_link_hash_warning) | |
830 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
831 | } | |
832 | ||
833 | switch (r_type) | |
834 | { | |
835 | case R_XTENSA_32: | |
836 | if (h == NULL) | |
837 | goto local_literal; | |
838 | ||
839 | if ((sec->flags & SEC_ALLOC) != 0) | |
840 | { | |
e0001a05 NC |
841 | if (h->got.refcount <= 0) |
842 | h->got.refcount = 1; | |
843 | else | |
844 | h->got.refcount += 1; | |
845 | } | |
846 | break; | |
847 | ||
848 | case R_XTENSA_PLT: | |
849 | /* If this relocation is against a local symbol, then it's | |
850 | exactly the same as a normal local GOT entry. */ | |
851 | if (h == NULL) | |
852 | goto local_literal; | |
853 | ||
854 | if ((sec->flags & SEC_ALLOC) != 0) | |
855 | { | |
e0001a05 NC |
856 | if (h->plt.refcount <= 0) |
857 | { | |
f5385ebf | 858 | h->needs_plt = 1; |
e0001a05 NC |
859 | h->plt.refcount = 1; |
860 | } | |
861 | else | |
862 | h->plt.refcount += 1; | |
863 | ||
864 | /* Keep track of the total PLT relocation count even if we | |
865 | don't yet know whether the dynamic sections will be | |
866 | created. */ | |
f0e6fdb2 | 867 | htab->plt_reloc_count += 1; |
e0001a05 NC |
868 | |
869 | if (elf_hash_table (info)->dynamic_sections_created) | |
870 | { | |
f0e6fdb2 | 871 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
872 | return FALSE; |
873 | } | |
874 | } | |
875 | break; | |
876 | ||
877 | local_literal: | |
878 | if ((sec->flags & SEC_ALLOC) != 0) | |
879 | { | |
880 | bfd_signed_vma *local_got_refcounts; | |
881 | ||
882 | /* This is a global offset table entry for a local symbol. */ | |
883 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
884 | if (local_got_refcounts == NULL) | |
885 | { | |
886 | bfd_size_type size; | |
887 | ||
888 | size = symtab_hdr->sh_info; | |
889 | size *= sizeof (bfd_signed_vma); | |
43cd72b9 BW |
890 | local_got_refcounts = |
891 | (bfd_signed_vma *) bfd_zalloc (abfd, size); | |
e0001a05 NC |
892 | if (local_got_refcounts == NULL) |
893 | return FALSE; | |
894 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
895 | } | |
896 | local_got_refcounts[r_symndx] += 1; | |
e0001a05 NC |
897 | } |
898 | break; | |
899 | ||
900 | case R_XTENSA_OP0: | |
901 | case R_XTENSA_OP1: | |
902 | case R_XTENSA_OP2: | |
43cd72b9 BW |
903 | case R_XTENSA_SLOT0_OP: |
904 | case R_XTENSA_SLOT1_OP: | |
905 | case R_XTENSA_SLOT2_OP: | |
906 | case R_XTENSA_SLOT3_OP: | |
907 | case R_XTENSA_SLOT4_OP: | |
908 | case R_XTENSA_SLOT5_OP: | |
909 | case R_XTENSA_SLOT6_OP: | |
910 | case R_XTENSA_SLOT7_OP: | |
911 | case R_XTENSA_SLOT8_OP: | |
912 | case R_XTENSA_SLOT9_OP: | |
913 | case R_XTENSA_SLOT10_OP: | |
914 | case R_XTENSA_SLOT11_OP: | |
915 | case R_XTENSA_SLOT12_OP: | |
916 | case R_XTENSA_SLOT13_OP: | |
917 | case R_XTENSA_SLOT14_OP: | |
918 | case R_XTENSA_SLOT0_ALT: | |
919 | case R_XTENSA_SLOT1_ALT: | |
920 | case R_XTENSA_SLOT2_ALT: | |
921 | case R_XTENSA_SLOT3_ALT: | |
922 | case R_XTENSA_SLOT4_ALT: | |
923 | case R_XTENSA_SLOT5_ALT: | |
924 | case R_XTENSA_SLOT6_ALT: | |
925 | case R_XTENSA_SLOT7_ALT: | |
926 | case R_XTENSA_SLOT8_ALT: | |
927 | case R_XTENSA_SLOT9_ALT: | |
928 | case R_XTENSA_SLOT10_ALT: | |
929 | case R_XTENSA_SLOT11_ALT: | |
930 | case R_XTENSA_SLOT12_ALT: | |
931 | case R_XTENSA_SLOT13_ALT: | |
932 | case R_XTENSA_SLOT14_ALT: | |
e0001a05 NC |
933 | case R_XTENSA_ASM_EXPAND: |
934 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 BW |
935 | case R_XTENSA_DIFF8: |
936 | case R_XTENSA_DIFF16: | |
937 | case R_XTENSA_DIFF32: | |
e0001a05 NC |
938 | /* Nothing to do for these. */ |
939 | break; | |
940 | ||
941 | case R_XTENSA_GNU_VTINHERIT: | |
942 | /* This relocation describes the C++ object vtable hierarchy. | |
943 | Reconstruct it for later use during GC. */ | |
c152c796 | 944 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
e0001a05 NC |
945 | return FALSE; |
946 | break; | |
947 | ||
948 | case R_XTENSA_GNU_VTENTRY: | |
949 | /* This relocation describes which C++ vtable entries are actually | |
950 | used. Record for later use during GC. */ | |
c152c796 | 951 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
e0001a05 NC |
952 | return FALSE; |
953 | break; | |
954 | ||
955 | default: | |
956 | break; | |
957 | } | |
958 | } | |
959 | ||
e0001a05 NC |
960 | return TRUE; |
961 | } | |
962 | ||
963 | ||
e0001a05 NC |
964 | /* Return the section that should be marked against GC for a given |
965 | relocation. */ | |
966 | ||
967 | static asection * | |
7fa3d080 | 968 | elf_xtensa_gc_mark_hook (asection *sec, |
07adf181 | 969 | struct bfd_link_info *info, |
7fa3d080 BW |
970 | Elf_Internal_Rela *rel, |
971 | struct elf_link_hash_entry *h, | |
972 | Elf_Internal_Sym *sym) | |
e0001a05 | 973 | { |
e1e5c0b5 BW |
974 | /* Property sections are marked "KEEP" in the linker scripts, but they |
975 | should not cause other sections to be marked. (This approach relies | |
976 | on elf_xtensa_discard_info to remove property table entries that | |
977 | describe discarded sections. Alternatively, it might be more | |
978 | efficient to avoid using "KEEP" in the linker scripts and instead use | |
979 | the gc_mark_extra_sections hook to mark only the property sections | |
980 | that describe marked sections. That alternative does not work well | |
981 | with the current property table sections, which do not correspond | |
982 | one-to-one with the sections they describe, but that should be fixed | |
983 | someday.) */ | |
984 | if (xtensa_is_property_section (sec)) | |
985 | return NULL; | |
986 | ||
07adf181 AM |
987 | if (h != NULL) |
988 | switch (ELF32_R_TYPE (rel->r_info)) | |
989 | { | |
990 | case R_XTENSA_GNU_VTINHERIT: | |
991 | case R_XTENSA_GNU_VTENTRY: | |
992 | return NULL; | |
993 | } | |
994 | ||
995 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
e0001a05 NC |
996 | } |
997 | ||
7fa3d080 | 998 | |
e0001a05 NC |
999 | /* Update the GOT & PLT entry reference counts |
1000 | for the section being removed. */ | |
1001 | ||
1002 | static bfd_boolean | |
7fa3d080 BW |
1003 | elf_xtensa_gc_sweep_hook (bfd *abfd, |
1004 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1005 | asection *sec, | |
1006 | const Elf_Internal_Rela *relocs) | |
e0001a05 NC |
1007 | { |
1008 | Elf_Internal_Shdr *symtab_hdr; | |
1009 | struct elf_link_hash_entry **sym_hashes; | |
1010 | bfd_signed_vma *local_got_refcounts; | |
1011 | const Elf_Internal_Rela *rel, *relend; | |
1012 | ||
1013 | if ((sec->flags & SEC_ALLOC) == 0) | |
1014 | return TRUE; | |
1015 | ||
1016 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1017 | sym_hashes = elf_sym_hashes (abfd); | |
1018 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1019 | ||
1020 | relend = relocs + sec->reloc_count; | |
1021 | for (rel = relocs; rel < relend; rel++) | |
1022 | { | |
1023 | unsigned long r_symndx; | |
1024 | unsigned int r_type; | |
1025 | struct elf_link_hash_entry *h = NULL; | |
1026 | ||
1027 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1028 | if (r_symndx >= symtab_hdr->sh_info) | |
3eb128b2 AM |
1029 | { |
1030 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1031 | while (h->root.type == bfd_link_hash_indirect | |
1032 | || h->root.type == bfd_link_hash_warning) | |
1033 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1034 | } | |
e0001a05 NC |
1035 | |
1036 | r_type = ELF32_R_TYPE (rel->r_info); | |
1037 | switch (r_type) | |
1038 | { | |
1039 | case R_XTENSA_32: | |
1040 | if (h == NULL) | |
1041 | goto local_literal; | |
1042 | if (h->got.refcount > 0) | |
1043 | h->got.refcount--; | |
1044 | break; | |
1045 | ||
1046 | case R_XTENSA_PLT: | |
1047 | if (h == NULL) | |
1048 | goto local_literal; | |
1049 | if (h->plt.refcount > 0) | |
1050 | h->plt.refcount--; | |
1051 | break; | |
1052 | ||
1053 | local_literal: | |
1054 | if (local_got_refcounts[r_symndx] > 0) | |
1055 | local_got_refcounts[r_symndx] -= 1; | |
1056 | break; | |
1057 | ||
1058 | default: | |
1059 | break; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | return TRUE; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | /* Create all the dynamic sections. */ | |
1068 | ||
1069 | static bfd_boolean | |
7fa3d080 | 1070 | elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
e0001a05 | 1071 | { |
f0e6fdb2 | 1072 | struct elf_xtensa_link_hash_table *htab; |
e901de89 | 1073 | flagword flags, noalloc_flags; |
f0e6fdb2 BW |
1074 | |
1075 | htab = elf_xtensa_hash_table (info); | |
e0001a05 NC |
1076 | |
1077 | /* First do all the standard stuff. */ | |
1078 | if (! _bfd_elf_create_dynamic_sections (dynobj, info)) | |
1079 | return FALSE; | |
f0e6fdb2 BW |
1080 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
1081 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1082 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1083 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
e0001a05 NC |
1084 | |
1085 | /* Create any extra PLT sections in case check_relocs has already | |
1086 | been called on all the non-dynamic input files. */ | |
f0e6fdb2 | 1087 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1088 | return FALSE; |
1089 | ||
e901de89 BW |
1090 | noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1091 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1092 | flags = noalloc_flags | SEC_ALLOC | SEC_LOAD; | |
e0001a05 NC |
1093 | |
1094 | /* Mark the ".got.plt" section READONLY. */ | |
f0e6fdb2 BW |
1095 | if (htab->sgotplt == NULL |
1096 | || ! bfd_set_section_flags (dynobj, htab->sgotplt, flags)) | |
e0001a05 NC |
1097 | return FALSE; |
1098 | ||
1099 | /* Create ".rela.got". */ | |
f0e6fdb2 BW |
1100 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", flags); |
1101 | if (htab->srelgot == NULL | |
1102 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
e0001a05 NC |
1103 | return FALSE; |
1104 | ||
e901de89 | 1105 | /* Create ".got.loc" (literal tables for use by dynamic linker). */ |
f0e6fdb2 BW |
1106 | htab->sgotloc = bfd_make_section_with_flags (dynobj, ".got.loc", flags); |
1107 | if (htab->sgotloc == NULL | |
1108 | || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2)) | |
e901de89 BW |
1109 | return FALSE; |
1110 | ||
e0001a05 | 1111 | /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */ |
f0e6fdb2 BW |
1112 | htab->spltlittbl = bfd_make_section_with_flags (dynobj, ".xt.lit.plt", |
1113 | noalloc_flags); | |
1114 | if (htab->spltlittbl == NULL | |
1115 | || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2)) | |
e0001a05 NC |
1116 | return FALSE; |
1117 | ||
1118 | return TRUE; | |
1119 | } | |
1120 | ||
1121 | ||
1122 | static bfd_boolean | |
f0e6fdb2 | 1123 | add_extra_plt_sections (struct bfd_link_info *info, int count) |
e0001a05 | 1124 | { |
f0e6fdb2 | 1125 | bfd *dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
1126 | int chunk; |
1127 | ||
1128 | /* Iterate over all chunks except 0 which uses the standard ".plt" and | |
1129 | ".got.plt" sections. */ | |
1130 | for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--) | |
1131 | { | |
1132 | char *sname; | |
1133 | flagword flags; | |
1134 | asection *s; | |
1135 | ||
1136 | /* Stop when we find a section has already been created. */ | |
f0e6fdb2 | 1137 | if (elf_xtensa_get_plt_section (info, chunk)) |
e0001a05 NC |
1138 | break; |
1139 | ||
1140 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1141 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1142 | ||
1143 | sname = (char *) bfd_malloc (10); | |
1144 | sprintf (sname, ".plt.%u", chunk); | |
ba05963f | 1145 | s = bfd_make_section_with_flags (dynobj, sname, flags | SEC_CODE); |
e0001a05 | 1146 | if (s == NULL |
e0001a05 NC |
1147 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1148 | return FALSE; | |
1149 | ||
1150 | sname = (char *) bfd_malloc (14); | |
1151 | sprintf (sname, ".got.plt.%u", chunk); | |
3496cb2a | 1152 | s = bfd_make_section_with_flags (dynobj, sname, flags); |
e0001a05 | 1153 | if (s == NULL |
e0001a05 NC |
1154 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1155 | return FALSE; | |
1156 | } | |
1157 | ||
1158 | return TRUE; | |
1159 | } | |
1160 | ||
1161 | ||
1162 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1163 | regular object. The current definition is in some section of the | |
1164 | dynamic object, but we're not including those sections. We have to | |
1165 | change the definition to something the rest of the link can | |
1166 | understand. */ | |
1167 | ||
1168 | static bfd_boolean | |
7fa3d080 BW |
1169 | elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1170 | struct elf_link_hash_entry *h) | |
e0001a05 NC |
1171 | { |
1172 | /* If this is a weak symbol, and there is a real definition, the | |
1173 | processor independent code will have arranged for us to see the | |
1174 | real definition first, and we can just use the same value. */ | |
7fa3d080 | 1175 | if (h->u.weakdef) |
e0001a05 | 1176 | { |
f6e332e6 AM |
1177 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1178 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1179 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1180 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
e0001a05 NC |
1181 | return TRUE; |
1182 | } | |
1183 | ||
1184 | /* This is a reference to a symbol defined by a dynamic object. The | |
1185 | reference must go through the GOT, so there's no need for COPY relocs, | |
1186 | .dynbss, etc. */ | |
1187 | ||
1188 | return TRUE; | |
1189 | } | |
1190 | ||
1191 | ||
e0001a05 | 1192 | static bfd_boolean |
f1ab2340 | 1193 | elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg) |
e0001a05 | 1194 | { |
f1ab2340 BW |
1195 | struct bfd_link_info *info; |
1196 | struct elf_xtensa_link_hash_table *htab; | |
1197 | bfd_boolean is_dynamic; | |
e0001a05 | 1198 | |
f1ab2340 BW |
1199 | if (h->root.type == bfd_link_hash_indirect) |
1200 | return TRUE; | |
e0001a05 NC |
1201 | |
1202 | if (h->root.type == bfd_link_hash_warning) | |
1203 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1204 | ||
f1ab2340 BW |
1205 | info = (struct bfd_link_info *) arg; |
1206 | htab = elf_xtensa_hash_table (info); | |
e0001a05 | 1207 | |
f1ab2340 | 1208 | is_dynamic = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 | 1209 | |
f1ab2340 BW |
1210 | if (! is_dynamic) |
1211 | { | |
1212 | if (info->shared) | |
1213 | { | |
1214 | /* For shared objects, there's no need for PLT entries for local | |
1215 | symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */ | |
1216 | if (h->plt.refcount > 0) | |
1217 | { | |
1218 | if (h->got.refcount < 0) | |
1219 | h->got.refcount = 0; | |
1220 | h->got.refcount += h->plt.refcount; | |
1221 | h->plt.refcount = 0; | |
1222 | } | |
1223 | } | |
1224 | else | |
1225 | { | |
1226 | /* Don't need any dynamic relocations at all. */ | |
1227 | h->plt.refcount = 0; | |
1228 | h->got.refcount = 0; | |
1229 | } | |
1230 | } | |
e0001a05 | 1231 | |
f1ab2340 BW |
1232 | if (h->plt.refcount > 0) |
1233 | htab->srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1234 | |
1235 | if (h->got.refcount > 0) | |
f1ab2340 | 1236 | htab->srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1237 | |
1238 | return TRUE; | |
1239 | } | |
1240 | ||
1241 | ||
1242 | static void | |
f0e6fdb2 | 1243 | elf_xtensa_allocate_local_got_size (struct bfd_link_info *info) |
e0001a05 | 1244 | { |
f0e6fdb2 | 1245 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1246 | bfd *i; |
1247 | ||
f0e6fdb2 BW |
1248 | htab = elf_xtensa_hash_table (info); |
1249 | ||
e0001a05 NC |
1250 | for (i = info->input_bfds; i; i = i->link_next) |
1251 | { | |
1252 | bfd_signed_vma *local_got_refcounts; | |
1253 | bfd_size_type j, cnt; | |
1254 | Elf_Internal_Shdr *symtab_hdr; | |
1255 | ||
1256 | local_got_refcounts = elf_local_got_refcounts (i); | |
1257 | if (!local_got_refcounts) | |
1258 | continue; | |
1259 | ||
1260 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
1261 | cnt = symtab_hdr->sh_info; | |
1262 | ||
1263 | for (j = 0; j < cnt; ++j) | |
1264 | { | |
1265 | if (local_got_refcounts[j] > 0) | |
f0e6fdb2 BW |
1266 | htab->srelgot->size += (local_got_refcounts[j] |
1267 | * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1268 | } |
1269 | } | |
1270 | } | |
1271 | ||
1272 | ||
1273 | /* Set the sizes of the dynamic sections. */ | |
1274 | ||
1275 | static bfd_boolean | |
7fa3d080 BW |
1276 | elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1277 | struct bfd_link_info *info) | |
e0001a05 | 1278 | { |
f0e6fdb2 | 1279 | struct elf_xtensa_link_hash_table *htab; |
e901de89 BW |
1280 | bfd *dynobj, *abfd; |
1281 | asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc; | |
e0001a05 NC |
1282 | bfd_boolean relplt, relgot; |
1283 | int plt_entries, plt_chunks, chunk; | |
1284 | ||
1285 | plt_entries = 0; | |
1286 | plt_chunks = 0; | |
e0001a05 | 1287 | |
f0e6fdb2 | 1288 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
1289 | dynobj = elf_hash_table (info)->dynobj; |
1290 | if (dynobj == NULL) | |
1291 | abort (); | |
f0e6fdb2 BW |
1292 | srelgot = htab->srelgot; |
1293 | srelplt = htab->srelplt; | |
e0001a05 NC |
1294 | |
1295 | if (elf_hash_table (info)->dynamic_sections_created) | |
1296 | { | |
f0e6fdb2 BW |
1297 | BFD_ASSERT (htab->srelgot != NULL |
1298 | && htab->srelplt != NULL | |
1299 | && htab->sgot != NULL | |
1300 | && htab->spltlittbl != NULL | |
1301 | && htab->sgotloc != NULL); | |
1302 | ||
e0001a05 | 1303 | /* Set the contents of the .interp section to the interpreter. */ |
893c4fe2 | 1304 | if (info->executable) |
e0001a05 NC |
1305 | { |
1306 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1307 | if (s == NULL) | |
1308 | abort (); | |
eea6121a | 1309 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
e0001a05 NC |
1310 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1311 | } | |
1312 | ||
1313 | /* Allocate room for one word in ".got". */ | |
f0e6fdb2 | 1314 | htab->sgot->size = 4; |
e0001a05 | 1315 | |
f1ab2340 BW |
1316 | /* Allocate space in ".rela.got" for literals that reference global |
1317 | symbols and space in ".rela.plt" for literals that have PLT | |
1318 | entries. */ | |
e0001a05 | 1319 | elf_link_hash_traverse (elf_hash_table (info), |
f1ab2340 | 1320 | elf_xtensa_allocate_dynrelocs, |
7fa3d080 | 1321 | (void *) info); |
e0001a05 | 1322 | |
e0001a05 NC |
1323 | /* If we are generating a shared object, we also need space in |
1324 | ".rela.got" for R_XTENSA_RELATIVE relocs for literals that | |
1325 | reference local symbols. */ | |
1326 | if (info->shared) | |
f0e6fdb2 | 1327 | elf_xtensa_allocate_local_got_size (info); |
e0001a05 | 1328 | |
e0001a05 NC |
1329 | /* Allocate space in ".plt" to match the size of ".rela.plt". For |
1330 | each PLT entry, we need the PLT code plus a 4-byte literal. | |
1331 | For each chunk of ".plt", we also need two more 4-byte | |
1332 | literals, two corresponding entries in ".rela.got", and an | |
1333 | 8-byte entry in ".xt.lit.plt". */ | |
f0e6fdb2 | 1334 | spltlittbl = htab->spltlittbl; |
eea6121a | 1335 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
1336 | plt_chunks = |
1337 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
1338 | ||
1339 | /* Iterate over all the PLT chunks, including any extra sections | |
1340 | created earlier because the initial count of PLT relocations | |
1341 | was an overestimate. */ | |
1342 | for (chunk = 0; | |
f0e6fdb2 | 1343 | (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL; |
e0001a05 NC |
1344 | chunk++) |
1345 | { | |
1346 | int chunk_entries; | |
1347 | ||
f0e6fdb2 BW |
1348 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
1349 | BFD_ASSERT (sgotplt != NULL); | |
e0001a05 NC |
1350 | |
1351 | if (chunk < plt_chunks - 1) | |
1352 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
1353 | else if (chunk == plt_chunks - 1) | |
1354 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
1355 | else | |
1356 | chunk_entries = 0; | |
1357 | ||
1358 | if (chunk_entries != 0) | |
1359 | { | |
eea6121a AM |
1360 | sgotplt->size = 4 * (chunk_entries + 2); |
1361 | splt->size = PLT_ENTRY_SIZE * chunk_entries; | |
1362 | srelgot->size += 2 * sizeof (Elf32_External_Rela); | |
1363 | spltlittbl->size += 8; | |
e0001a05 NC |
1364 | } |
1365 | else | |
1366 | { | |
eea6121a AM |
1367 | sgotplt->size = 0; |
1368 | splt->size = 0; | |
e0001a05 NC |
1369 | } |
1370 | } | |
e901de89 BW |
1371 | |
1372 | /* Allocate space in ".got.loc" to match the total size of all the | |
1373 | literal tables. */ | |
f0e6fdb2 | 1374 | sgotloc = htab->sgotloc; |
eea6121a | 1375 | sgotloc->size = spltlittbl->size; |
e901de89 BW |
1376 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
1377 | { | |
1378 | if (abfd->flags & DYNAMIC) | |
1379 | continue; | |
1380 | for (s = abfd->sections; s != NULL; s = s->next) | |
1381 | { | |
b536dc1e BW |
1382 | if (! elf_discarded_section (s) |
1383 | && xtensa_is_littable_section (s) | |
1384 | && s != spltlittbl) | |
eea6121a | 1385 | sgotloc->size += s->size; |
e901de89 BW |
1386 | } |
1387 | } | |
e0001a05 NC |
1388 | } |
1389 | ||
1390 | /* Allocate memory for dynamic sections. */ | |
1391 | relplt = FALSE; | |
1392 | relgot = FALSE; | |
1393 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1394 | { | |
1395 | const char *name; | |
e0001a05 NC |
1396 | |
1397 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1398 | continue; | |
1399 | ||
1400 | /* It's OK to base decisions on the section name, because none | |
1401 | of the dynobj section names depend upon the input files. */ | |
1402 | name = bfd_get_section_name (dynobj, s); | |
1403 | ||
0112cd26 | 1404 | if (CONST_STRNEQ (name, ".rela")) |
e0001a05 | 1405 | { |
c456f082 | 1406 | if (s->size != 0) |
e0001a05 | 1407 | { |
c456f082 AM |
1408 | if (strcmp (name, ".rela.plt") == 0) |
1409 | relplt = TRUE; | |
1410 | else if (strcmp (name, ".rela.got") == 0) | |
1411 | relgot = TRUE; | |
1412 | ||
1413 | /* We use the reloc_count field as a counter if we need | |
1414 | to copy relocs into the output file. */ | |
1415 | s->reloc_count = 0; | |
e0001a05 NC |
1416 | } |
1417 | } | |
0112cd26 NC |
1418 | else if (! CONST_STRNEQ (name, ".plt.") |
1419 | && ! CONST_STRNEQ (name, ".got.plt.") | |
c456f082 | 1420 | && strcmp (name, ".got") != 0 |
e0001a05 NC |
1421 | && strcmp (name, ".plt") != 0 |
1422 | && strcmp (name, ".got.plt") != 0 | |
e901de89 BW |
1423 | && strcmp (name, ".xt.lit.plt") != 0 |
1424 | && strcmp (name, ".got.loc") != 0) | |
e0001a05 NC |
1425 | { |
1426 | /* It's not one of our sections, so don't allocate space. */ | |
1427 | continue; | |
1428 | } | |
1429 | ||
c456f082 AM |
1430 | if (s->size == 0) |
1431 | { | |
1432 | /* If we don't need this section, strip it from the output | |
1433 | file. We must create the ".plt*" and ".got.plt*" | |
1434 | sections in create_dynamic_sections and/or check_relocs | |
1435 | based on a conservative estimate of the PLT relocation | |
1436 | count, because the sections must be created before the | |
1437 | linker maps input sections to output sections. The | |
1438 | linker does that before size_dynamic_sections, where we | |
1439 | compute the exact size of the PLT, so there may be more | |
1440 | of these sections than are actually needed. */ | |
1441 | s->flags |= SEC_EXCLUDE; | |
1442 | } | |
1443 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
e0001a05 NC |
1444 | { |
1445 | /* Allocate memory for the section contents. */ | |
eea6121a | 1446 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1447 | if (s->contents == NULL) |
e0001a05 NC |
1448 | return FALSE; |
1449 | } | |
1450 | } | |
1451 | ||
1452 | if (elf_hash_table (info)->dynamic_sections_created) | |
1453 | { | |
1454 | /* Add the special XTENSA_RTLD relocations now. The offsets won't be | |
1455 | known until finish_dynamic_sections, but we need to get the relocs | |
1456 | in place before they are sorted. */ | |
e0001a05 NC |
1457 | for (chunk = 0; chunk < plt_chunks; chunk++) |
1458 | { | |
1459 | Elf_Internal_Rela irela; | |
1460 | bfd_byte *loc; | |
1461 | ||
1462 | irela.r_offset = 0; | |
1463 | irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD); | |
1464 | irela.r_addend = 0; | |
1465 | ||
1466 | loc = (srelgot->contents | |
1467 | + srelgot->reloc_count * sizeof (Elf32_External_Rela)); | |
1468 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
1469 | bfd_elf32_swap_reloca_out (output_bfd, &irela, | |
1470 | loc + sizeof (Elf32_External_Rela)); | |
1471 | srelgot->reloc_count += 2; | |
1472 | } | |
1473 | ||
1474 | /* Add some entries to the .dynamic section. We fill in the | |
1475 | values later, in elf_xtensa_finish_dynamic_sections, but we | |
1476 | must add the entries now so that we get the correct size for | |
1477 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1478 | dynamic linker and used by the debugger. */ | |
1479 | #define add_dynamic_entry(TAG, VAL) \ | |
5a580b3a | 1480 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
e0001a05 | 1481 | |
ba05963f | 1482 | if (info->executable) |
e0001a05 NC |
1483 | { |
1484 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1485 | return FALSE; | |
1486 | } | |
1487 | ||
1488 | if (relplt) | |
1489 | { | |
1490 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
1491 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1492 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1493 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1494 | return FALSE; | |
1495 | } | |
1496 | ||
1497 | if (relgot) | |
1498 | { | |
1499 | if (!add_dynamic_entry (DT_RELA, 0) | |
1500 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1501 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
1502 | return FALSE; | |
1503 | } | |
1504 | ||
e0001a05 NC |
1505 | if (!add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0) |
1506 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0)) | |
1507 | return FALSE; | |
1508 | } | |
1509 | #undef add_dynamic_entry | |
1510 | ||
1511 | return TRUE; | |
1512 | } | |
1513 | ||
e0001a05 NC |
1514 | \f |
1515 | /* Perform the specified relocation. The instruction at (contents + address) | |
1516 | is modified to set one operand to represent the value in "relocation". The | |
1517 | operand position is determined by the relocation type recorded in the | |
1518 | howto. */ | |
1519 | ||
1520 | #define CALL_SEGMENT_BITS (30) | |
7fa3d080 | 1521 | #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS) |
e0001a05 NC |
1522 | |
1523 | static bfd_reloc_status_type | |
7fa3d080 BW |
1524 | elf_xtensa_do_reloc (reloc_howto_type *howto, |
1525 | bfd *abfd, | |
1526 | asection *input_section, | |
1527 | bfd_vma relocation, | |
1528 | bfd_byte *contents, | |
1529 | bfd_vma address, | |
1530 | bfd_boolean is_weak_undef, | |
1531 | char **error_message) | |
e0001a05 | 1532 | { |
43cd72b9 | 1533 | xtensa_format fmt; |
e0001a05 | 1534 | xtensa_opcode opcode; |
e0001a05 | 1535 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
1536 | static xtensa_insnbuf ibuff = NULL; |
1537 | static xtensa_insnbuf sbuff = NULL; | |
1538 | bfd_vma self_address = 0; | |
1539 | bfd_size_type input_size; | |
1540 | int opnd, slot; | |
e0001a05 NC |
1541 | uint32 newval; |
1542 | ||
43cd72b9 BW |
1543 | if (!ibuff) |
1544 | { | |
1545 | ibuff = xtensa_insnbuf_alloc (isa); | |
1546 | sbuff = xtensa_insnbuf_alloc (isa); | |
1547 | } | |
1548 | ||
1549 | input_size = bfd_get_section_limit (abfd, input_section); | |
1550 | ||
e0001a05 NC |
1551 | switch (howto->type) |
1552 | { | |
1553 | case R_XTENSA_NONE: | |
43cd72b9 BW |
1554 | case R_XTENSA_DIFF8: |
1555 | case R_XTENSA_DIFF16: | |
1556 | case R_XTENSA_DIFF32: | |
e0001a05 NC |
1557 | return bfd_reloc_ok; |
1558 | ||
1559 | case R_XTENSA_ASM_EXPAND: | |
1560 | if (!is_weak_undef) | |
1561 | { | |
1562 | /* Check for windowed CALL across a 1GB boundary. */ | |
1563 | xtensa_opcode opcode = | |
1564 | get_expanded_call_opcode (contents + address, | |
43cd72b9 | 1565 | input_size - address, 0); |
e0001a05 NC |
1566 | if (is_windowed_call_opcode (opcode)) |
1567 | { | |
1568 | self_address = (input_section->output_section->vma | |
1569 | + input_section->output_offset | |
1570 | + address); | |
43cd72b9 BW |
1571 | if ((self_address >> CALL_SEGMENT_BITS) |
1572 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 NC |
1573 | { |
1574 | *error_message = "windowed longcall crosses 1GB boundary; " | |
1575 | "return may fail"; | |
1576 | return bfd_reloc_dangerous; | |
1577 | } | |
1578 | } | |
1579 | } | |
1580 | return bfd_reloc_ok; | |
1581 | ||
1582 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 | 1583 | { |
e0001a05 | 1584 | /* Convert the L32R/CALLX to CALL. */ |
43cd72b9 BW |
1585 | bfd_reloc_status_type retval = |
1586 | elf_xtensa_do_asm_simplify (contents, address, input_size, | |
1587 | error_message); | |
e0001a05 | 1588 | if (retval != bfd_reloc_ok) |
43cd72b9 | 1589 | return bfd_reloc_dangerous; |
e0001a05 NC |
1590 | |
1591 | /* The CALL needs to be relocated. Continue below for that part. */ | |
1592 | address += 3; | |
43cd72b9 | 1593 | howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ]; |
e0001a05 NC |
1594 | } |
1595 | break; | |
1596 | ||
1597 | case R_XTENSA_32: | |
1598 | case R_XTENSA_PLT: | |
1599 | { | |
1600 | bfd_vma x; | |
1601 | x = bfd_get_32 (abfd, contents + address); | |
1602 | x = x + relocation; | |
1603 | bfd_put_32 (abfd, x, contents + address); | |
1604 | } | |
1605 | return bfd_reloc_ok; | |
1606 | } | |
1607 | ||
43cd72b9 BW |
1608 | /* Only instruction slot-specific relocations handled below.... */ |
1609 | slot = get_relocation_slot (howto->type); | |
1610 | if (slot == XTENSA_UNDEFINED) | |
e0001a05 | 1611 | { |
43cd72b9 | 1612 | *error_message = "unexpected relocation"; |
e0001a05 NC |
1613 | return bfd_reloc_dangerous; |
1614 | } | |
1615 | ||
43cd72b9 BW |
1616 | /* Read the instruction into a buffer and decode the opcode. */ |
1617 | xtensa_insnbuf_from_chars (isa, ibuff, contents + address, | |
1618 | input_size - address); | |
1619 | fmt = xtensa_format_decode (isa, ibuff); | |
1620 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 1621 | { |
43cd72b9 | 1622 | *error_message = "cannot decode instruction format"; |
e0001a05 NC |
1623 | return bfd_reloc_dangerous; |
1624 | } | |
1625 | ||
43cd72b9 | 1626 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); |
e0001a05 | 1627 | |
43cd72b9 BW |
1628 | opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff); |
1629 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 1630 | { |
43cd72b9 | 1631 | *error_message = "cannot decode instruction opcode"; |
e0001a05 NC |
1632 | return bfd_reloc_dangerous; |
1633 | } | |
1634 | ||
43cd72b9 BW |
1635 | /* Check for opcode-specific "alternate" relocations. */ |
1636 | if (is_alt_relocation (howto->type)) | |
1637 | { | |
1638 | if (opcode == get_l32r_opcode ()) | |
1639 | { | |
1640 | /* Handle the special-case of non-PC-relative L32R instructions. */ | |
1641 | bfd *output_bfd = input_section->output_section->owner; | |
1642 | asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4"); | |
1643 | if (!lit4_sec) | |
1644 | { | |
1645 | *error_message = "relocation references missing .lit4 section"; | |
1646 | return bfd_reloc_dangerous; | |
1647 | } | |
1648 | self_address = ((lit4_sec->vma & ~0xfff) | |
1649 | + 0x40000 - 3); /* -3 to compensate for do_reloc */ | |
1650 | newval = relocation; | |
1651 | opnd = 1; | |
1652 | } | |
1653 | else if (opcode == get_const16_opcode ()) | |
1654 | { | |
1655 | /* ALT used for high 16 bits. */ | |
1656 | newval = relocation >> 16; | |
1657 | opnd = 1; | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | /* No other "alternate" relocations currently defined. */ | |
1662 | *error_message = "unexpected relocation"; | |
1663 | return bfd_reloc_dangerous; | |
1664 | } | |
1665 | } | |
1666 | else /* Not an "alternate" relocation.... */ | |
1667 | { | |
1668 | if (opcode == get_const16_opcode ()) | |
1669 | { | |
1670 | newval = relocation & 0xffff; | |
1671 | opnd = 1; | |
1672 | } | |
1673 | else | |
1674 | { | |
1675 | /* ...normal PC-relative relocation.... */ | |
1676 | ||
1677 | /* Determine which operand is being relocated. */ | |
1678 | opnd = get_relocation_opnd (opcode, howto->type); | |
1679 | if (opnd == XTENSA_UNDEFINED) | |
1680 | { | |
1681 | *error_message = "unexpected relocation"; | |
1682 | return bfd_reloc_dangerous; | |
1683 | } | |
1684 | ||
1685 | if (!howto->pc_relative) | |
1686 | { | |
1687 | *error_message = "expected PC-relative relocation"; | |
1688 | return bfd_reloc_dangerous; | |
1689 | } | |
e0001a05 | 1690 | |
43cd72b9 BW |
1691 | /* Calculate the PC address for this instruction. */ |
1692 | self_address = (input_section->output_section->vma | |
1693 | + input_section->output_offset | |
1694 | + address); | |
e0001a05 | 1695 | |
43cd72b9 BW |
1696 | newval = relocation; |
1697 | } | |
1698 | } | |
e0001a05 | 1699 | |
43cd72b9 BW |
1700 | /* Apply the relocation. */ |
1701 | if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address) | |
1702 | || xtensa_operand_encode (isa, opcode, opnd, &newval) | |
1703 | || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot, | |
1704 | sbuff, newval)) | |
e0001a05 | 1705 | { |
2db662be BW |
1706 | const char *opname = xtensa_opcode_name (isa, opcode); |
1707 | const char *msg; | |
1708 | ||
1709 | msg = "cannot encode"; | |
1710 | if (is_direct_call_opcode (opcode)) | |
1711 | { | |
1712 | if ((relocation & 0x3) != 0) | |
1713 | msg = "misaligned call target"; | |
1714 | else | |
1715 | msg = "call target out of range"; | |
1716 | } | |
1717 | else if (opcode == get_l32r_opcode ()) | |
1718 | { | |
1719 | if ((relocation & 0x3) != 0) | |
1720 | msg = "misaligned literal target"; | |
1721 | else if (is_alt_relocation (howto->type)) | |
1722 | msg = "literal target out of range (too many literals)"; | |
1723 | else if (self_address > relocation) | |
1724 | msg = "literal target out of range (try using text-section-literals)"; | |
1725 | else | |
1726 | msg = "literal placed after use"; | |
1727 | } | |
1728 | ||
1729 | *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg); | |
e0001a05 NC |
1730 | return bfd_reloc_dangerous; |
1731 | } | |
1732 | ||
43cd72b9 | 1733 | /* Check for calls across 1GB boundaries. */ |
e0001a05 NC |
1734 | if (is_direct_call_opcode (opcode) |
1735 | && is_windowed_call_opcode (opcode)) | |
1736 | { | |
43cd72b9 BW |
1737 | if ((self_address >> CALL_SEGMENT_BITS) |
1738 | != (relocation >> CALL_SEGMENT_BITS)) | |
e0001a05 | 1739 | { |
43cd72b9 BW |
1740 | *error_message = |
1741 | "windowed call crosses 1GB boundary; return may fail"; | |
e0001a05 NC |
1742 | return bfd_reloc_dangerous; |
1743 | } | |
1744 | } | |
1745 | ||
43cd72b9 BW |
1746 | /* Write the modified instruction back out of the buffer. */ |
1747 | xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff); | |
1748 | xtensa_insnbuf_to_chars (isa, ibuff, contents + address, | |
1749 | input_size - address); | |
e0001a05 NC |
1750 | return bfd_reloc_ok; |
1751 | } | |
1752 | ||
1753 | ||
2db662be | 1754 | static char * |
7fa3d080 | 1755 | vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...) |
e0001a05 NC |
1756 | { |
1757 | /* To reduce the size of the memory leak, | |
1758 | we only use a single message buffer. */ | |
1759 | static bfd_size_type alloc_size = 0; | |
1760 | static char *message = NULL; | |
1761 | bfd_size_type orig_len, len = 0; | |
1762 | bfd_boolean is_append; | |
1763 | ||
1764 | VA_OPEN (ap, arglen); | |
1765 | VA_FIXEDARG (ap, const char *, origmsg); | |
1766 | ||
1767 | is_append = (origmsg == message); | |
1768 | ||
1769 | orig_len = strlen (origmsg); | |
1770 | len = orig_len + strlen (fmt) + arglen + 20; | |
1771 | if (len > alloc_size) | |
1772 | { | |
1773 | message = (char *) bfd_realloc (message, len); | |
1774 | alloc_size = len; | |
1775 | } | |
1776 | if (!is_append) | |
1777 | memcpy (message, origmsg, orig_len); | |
1778 | vsprintf (message + orig_len, fmt, ap); | |
1779 | VA_CLOSE (ap); | |
1780 | return message; | |
1781 | } | |
1782 | ||
1783 | ||
e0001a05 NC |
1784 | /* This function is registered as the "special_function" in the |
1785 | Xtensa howto for handling simplify operations. | |
1786 | bfd_perform_relocation / bfd_install_relocation use it to | |
1787 | perform (install) the specified relocation. Since this replaces the code | |
1788 | in bfd_perform_relocation, it is basically an Xtensa-specific, | |
1789 | stripped-down version of bfd_perform_relocation. */ | |
1790 | ||
1791 | static bfd_reloc_status_type | |
7fa3d080 BW |
1792 | bfd_elf_xtensa_reloc (bfd *abfd, |
1793 | arelent *reloc_entry, | |
1794 | asymbol *symbol, | |
1795 | void *data, | |
1796 | asection *input_section, | |
1797 | bfd *output_bfd, | |
1798 | char **error_message) | |
e0001a05 NC |
1799 | { |
1800 | bfd_vma relocation; | |
1801 | bfd_reloc_status_type flag; | |
1802 | bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1803 | bfd_vma output_base = 0; | |
1804 | reloc_howto_type *howto = reloc_entry->howto; | |
1805 | asection *reloc_target_output_section; | |
1806 | bfd_boolean is_weak_undef; | |
1807 | ||
dd1a320b BW |
1808 | if (!xtensa_default_isa) |
1809 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
1810 | ||
1049f94e | 1811 | /* ELF relocs are against symbols. If we are producing relocatable |
e0001a05 NC |
1812 | output, and the reloc is against an external symbol, the resulting |
1813 | reloc will also be against the same symbol. In such a case, we | |
1814 | don't want to change anything about the way the reloc is handled, | |
1815 | since it will all be done at final link time. This test is similar | |
1816 | to what bfd_elf_generic_reloc does except that it lets relocs with | |
1817 | howto->partial_inplace go through even if the addend is non-zero. | |
1818 | (The real problem is that partial_inplace is set for XTENSA_32 | |
1819 | relocs to begin with, but that's a long story and there's little we | |
1820 | can do about it now....) */ | |
1821 | ||
7fa3d080 | 1822 | if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0) |
e0001a05 NC |
1823 | { |
1824 | reloc_entry->address += input_section->output_offset; | |
1825 | return bfd_reloc_ok; | |
1826 | } | |
1827 | ||
1828 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1829 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
e0001a05 NC |
1830 | return bfd_reloc_outofrange; |
1831 | ||
4cc11e76 | 1832 | /* Work out which section the relocation is targeted at and the |
e0001a05 NC |
1833 | initial relocation command value. */ |
1834 | ||
1835 | /* Get symbol value. (Common symbols are special.) */ | |
1836 | if (bfd_is_com_section (symbol->section)) | |
1837 | relocation = 0; | |
1838 | else | |
1839 | relocation = symbol->value; | |
1840 | ||
1841 | reloc_target_output_section = symbol->section->output_section; | |
1842 | ||
1843 | /* Convert input-section-relative symbol value to absolute. */ | |
1844 | if ((output_bfd && !howto->partial_inplace) | |
1845 | || reloc_target_output_section == NULL) | |
1846 | output_base = 0; | |
1847 | else | |
1848 | output_base = reloc_target_output_section->vma; | |
1849 | ||
1850 | relocation += output_base + symbol->section->output_offset; | |
1851 | ||
1852 | /* Add in supplied addend. */ | |
1853 | relocation += reloc_entry->addend; | |
1854 | ||
1855 | /* Here the variable relocation holds the final address of the | |
1856 | symbol we are relocating against, plus any addend. */ | |
1857 | if (output_bfd) | |
1858 | { | |
1859 | if (!howto->partial_inplace) | |
1860 | { | |
1861 | /* This is a partial relocation, and we want to apply the relocation | |
1862 | to the reloc entry rather than the raw data. Everything except | |
1863 | relocations against section symbols has already been handled | |
1864 | above. */ | |
43cd72b9 | 1865 | |
e0001a05 NC |
1866 | BFD_ASSERT (symbol->flags & BSF_SECTION_SYM); |
1867 | reloc_entry->addend = relocation; | |
1868 | reloc_entry->address += input_section->output_offset; | |
1869 | return bfd_reloc_ok; | |
1870 | } | |
1871 | else | |
1872 | { | |
1873 | reloc_entry->address += input_section->output_offset; | |
1874 | reloc_entry->addend = 0; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | is_weak_undef = (bfd_is_und_section (symbol->section) | |
1879 | && (symbol->flags & BSF_WEAK) != 0); | |
1880 | flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation, | |
1881 | (bfd_byte *) data, (bfd_vma) octets, | |
1882 | is_weak_undef, error_message); | |
1883 | ||
1884 | if (flag == bfd_reloc_dangerous) | |
1885 | { | |
1886 | /* Add the symbol name to the error message. */ | |
1887 | if (! *error_message) | |
1888 | *error_message = ""; | |
1889 | *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)", | |
1890 | strlen (symbol->name) + 17, | |
70961b9d AM |
1891 | symbol->name, |
1892 | (unsigned long) reloc_entry->addend); | |
e0001a05 NC |
1893 | } |
1894 | ||
1895 | return flag; | |
1896 | } | |
1897 | ||
1898 | ||
1899 | /* Set up an entry in the procedure linkage table. */ | |
1900 | ||
1901 | static bfd_vma | |
f0e6fdb2 | 1902 | elf_xtensa_create_plt_entry (struct bfd_link_info *info, |
7fa3d080 BW |
1903 | bfd *output_bfd, |
1904 | unsigned reloc_index) | |
e0001a05 NC |
1905 | { |
1906 | asection *splt, *sgotplt; | |
1907 | bfd_vma plt_base, got_base; | |
1908 | bfd_vma code_offset, lit_offset; | |
1909 | int chunk; | |
1910 | ||
1911 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
1912 | splt = elf_xtensa_get_plt_section (info, chunk); |
1913 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
1914 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
1915 | ||
1916 | plt_base = splt->output_section->vma + splt->output_offset; | |
1917 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
1918 | ||
1919 | lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4; | |
1920 | code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE; | |
1921 | ||
1922 | /* Fill in the literal entry. This is the offset of the dynamic | |
1923 | relocation entry. */ | |
1924 | bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela), | |
1925 | sgotplt->contents + lit_offset); | |
1926 | ||
1927 | /* Fill in the entry in the procedure linkage table. */ | |
1928 | memcpy (splt->contents + code_offset, | |
1929 | (bfd_big_endian (output_bfd) | |
1930 | ? elf_xtensa_be_plt_entry | |
1931 | : elf_xtensa_le_plt_entry), | |
1932 | PLT_ENTRY_SIZE); | |
1933 | bfd_put_16 (output_bfd, l32r_offset (got_base + 0, | |
1934 | plt_base + code_offset + 3), | |
1935 | splt->contents + code_offset + 4); | |
1936 | bfd_put_16 (output_bfd, l32r_offset (got_base + 4, | |
1937 | plt_base + code_offset + 6), | |
1938 | splt->contents + code_offset + 7); | |
1939 | bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset, | |
1940 | plt_base + code_offset + 9), | |
1941 | splt->contents + code_offset + 10); | |
1942 | ||
1943 | return plt_base + code_offset; | |
1944 | } | |
1945 | ||
1946 | ||
e0001a05 | 1947 | /* Relocate an Xtensa ELF section. This is invoked by the linker for |
1049f94e | 1948 | both relocatable and final links. */ |
e0001a05 NC |
1949 | |
1950 | static bfd_boolean | |
7fa3d080 BW |
1951 | elf_xtensa_relocate_section (bfd *output_bfd, |
1952 | struct bfd_link_info *info, | |
1953 | bfd *input_bfd, | |
1954 | asection *input_section, | |
1955 | bfd_byte *contents, | |
1956 | Elf_Internal_Rela *relocs, | |
1957 | Elf_Internal_Sym *local_syms, | |
1958 | asection **local_sections) | |
e0001a05 | 1959 | { |
f0e6fdb2 | 1960 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1961 | Elf_Internal_Shdr *symtab_hdr; |
1962 | Elf_Internal_Rela *rel; | |
1963 | Elf_Internal_Rela *relend; | |
1964 | struct elf_link_hash_entry **sym_hashes; | |
88d65ad6 BW |
1965 | property_table_entry *lit_table = 0; |
1966 | int ltblsize = 0; | |
e0001a05 | 1967 | char *error_message = NULL; |
43cd72b9 | 1968 | bfd_size_type input_size; |
e0001a05 | 1969 | |
43cd72b9 BW |
1970 | if (!xtensa_default_isa) |
1971 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 1972 | |
f0e6fdb2 | 1973 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
1974 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1975 | sym_hashes = elf_sym_hashes (input_bfd); | |
1976 | ||
88d65ad6 BW |
1977 | if (elf_hash_table (info)->dynamic_sections_created) |
1978 | { | |
1979 | ltblsize = xtensa_read_table_entries (input_bfd, input_section, | |
43cd72b9 BW |
1980 | &lit_table, XTENSA_LIT_SEC_NAME, |
1981 | TRUE); | |
88d65ad6 BW |
1982 | if (ltblsize < 0) |
1983 | return FALSE; | |
1984 | } | |
1985 | ||
43cd72b9 BW |
1986 | input_size = bfd_get_section_limit (input_bfd, input_section); |
1987 | ||
e0001a05 NC |
1988 | rel = relocs; |
1989 | relend = relocs + input_section->reloc_count; | |
1990 | for (; rel < relend; rel++) | |
1991 | { | |
1992 | int r_type; | |
1993 | reloc_howto_type *howto; | |
1994 | unsigned long r_symndx; | |
1995 | struct elf_link_hash_entry *h; | |
1996 | Elf_Internal_Sym *sym; | |
1997 | asection *sec; | |
1998 | bfd_vma relocation; | |
1999 | bfd_reloc_status_type r; | |
2000 | bfd_boolean is_weak_undef; | |
2001 | bfd_boolean unresolved_reloc; | |
9b8c98a4 | 2002 | bfd_boolean warned; |
e0001a05 NC |
2003 | |
2004 | r_type = ELF32_R_TYPE (rel->r_info); | |
2005 | if (r_type == (int) R_XTENSA_GNU_VTINHERIT | |
2006 | || r_type == (int) R_XTENSA_GNU_VTENTRY) | |
2007 | continue; | |
2008 | ||
2009 | if (r_type < 0 || r_type >= (int) R_XTENSA_max) | |
2010 | { | |
2011 | bfd_set_error (bfd_error_bad_value); | |
2012 | return FALSE; | |
2013 | } | |
2014 | howto = &elf_howto_table[r_type]; | |
2015 | ||
2016 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2017 | ||
ab96bf03 AM |
2018 | h = NULL; |
2019 | sym = NULL; | |
2020 | sec = NULL; | |
2021 | is_weak_undef = FALSE; | |
2022 | unresolved_reloc = FALSE; | |
2023 | warned = FALSE; | |
2024 | ||
2025 | if (howto->partial_inplace && !info->relocatable) | |
2026 | { | |
2027 | /* Because R_XTENSA_32 was made partial_inplace to fix some | |
2028 | problems with DWARF info in partial links, there may be | |
2029 | an addend stored in the contents. Take it out of there | |
2030 | and move it back into the addend field of the reloc. */ | |
2031 | rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2032 | bfd_put_32 (input_bfd, 0, contents + rel->r_offset); | |
2033 | } | |
2034 | ||
2035 | if (r_symndx < symtab_hdr->sh_info) | |
2036 | { | |
2037 | sym = local_syms + r_symndx; | |
2038 | sec = local_sections[r_symndx]; | |
2039 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2040 | } | |
2041 | else | |
2042 | { | |
2043 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2044 | r_symndx, symtab_hdr, sym_hashes, | |
2045 | h, sec, relocation, | |
2046 | unresolved_reloc, warned); | |
2047 | ||
2048 | if (relocation == 0 | |
2049 | && !unresolved_reloc | |
2050 | && h->root.type == bfd_link_hash_undefweak) | |
2051 | is_weak_undef = TRUE; | |
2052 | } | |
2053 | ||
2054 | if (sec != NULL && elf_discarded_section (sec)) | |
2055 | { | |
2056 | /* For relocs against symbols from removed linkonce sections, | |
2057 | or sections discarded by a linker script, we just want the | |
2058 | section contents zeroed. Avoid any special processing. */ | |
2059 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2060 | rel->r_info = 0; | |
2061 | rel->r_addend = 0; | |
2062 | continue; | |
2063 | } | |
2064 | ||
1049f94e | 2065 | if (info->relocatable) |
e0001a05 | 2066 | { |
43cd72b9 | 2067 | /* This is a relocatable link. |
e0001a05 NC |
2068 | 1) If the reloc is against a section symbol, adjust |
2069 | according to the output section. | |
2070 | 2) If there is a new target for this relocation, | |
2071 | the new target will be in the same output section. | |
2072 | We adjust the relocation by the output section | |
2073 | difference. */ | |
2074 | ||
2075 | if (relaxing_section) | |
2076 | { | |
2077 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2078 | if (!do_fix_for_relocatable_link (rel, input_bfd, input_section, |
2079 | contents)) | |
2080 | return FALSE; | |
e0001a05 NC |
2081 | r_type = ELF32_R_TYPE (rel->r_info); |
2082 | } | |
2083 | ||
43cd72b9 | 2084 | if (r_type == R_XTENSA_ASM_SIMPLIFY) |
e0001a05 | 2085 | { |
43cd72b9 | 2086 | char *error_message = NULL; |
e0001a05 NC |
2087 | /* Convert ASM_SIMPLIFY into the simpler relocation |
2088 | so that they never escape a relaxing link. */ | |
43cd72b9 BW |
2089 | r = contract_asm_expansion (contents, input_size, rel, |
2090 | &error_message); | |
2091 | if (r != bfd_reloc_ok) | |
2092 | { | |
2093 | if (!((*info->callbacks->reloc_dangerous) | |
2094 | (info, error_message, input_bfd, input_section, | |
2095 | rel->r_offset))) | |
2096 | return FALSE; | |
2097 | } | |
e0001a05 NC |
2098 | r_type = ELF32_R_TYPE (rel->r_info); |
2099 | } | |
2100 | ||
1049f94e | 2101 | /* This is a relocatable link, so we don't have to change |
e0001a05 NC |
2102 | anything unless the reloc is against a section symbol, |
2103 | in which case we have to adjust according to where the | |
2104 | section symbol winds up in the output section. */ | |
2105 | if (r_symndx < symtab_hdr->sh_info) | |
2106 | { | |
2107 | sym = local_syms + r_symndx; | |
2108 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2109 | { | |
2110 | sec = local_sections[r_symndx]; | |
2111 | rel->r_addend += sec->output_offset + sym->st_value; | |
2112 | } | |
2113 | } | |
2114 | ||
2115 | /* If there is an addend with a partial_inplace howto, | |
2116 | then move the addend to the contents. This is a hack | |
1049f94e | 2117 | to work around problems with DWARF in relocatable links |
e0001a05 NC |
2118 | with some previous version of BFD. Now we can't easily get |
2119 | rid of the hack without breaking backward compatibility.... */ | |
2120 | if (rel->r_addend) | |
2121 | { | |
2122 | howto = &elf_howto_table[r_type]; | |
2123 | if (howto->partial_inplace) | |
2124 | { | |
2125 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2126 | rel->r_addend, contents, | |
2127 | rel->r_offset, FALSE, | |
2128 | &error_message); | |
2129 | if (r != bfd_reloc_ok) | |
2130 | { | |
2131 | if (!((*info->callbacks->reloc_dangerous) | |
2132 | (info, error_message, input_bfd, input_section, | |
2133 | rel->r_offset))) | |
2134 | return FALSE; | |
2135 | } | |
2136 | rel->r_addend = 0; | |
2137 | } | |
2138 | } | |
2139 | ||
1049f94e | 2140 | /* Done with work for relocatable link; continue with next reloc. */ |
e0001a05 NC |
2141 | continue; |
2142 | } | |
2143 | ||
2144 | /* This is a final link. */ | |
2145 | ||
e0001a05 NC |
2146 | if (relaxing_section) |
2147 | { | |
2148 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2149 | do_fix_for_final_link (rel, input_bfd, input_section, contents, |
2150 | &relocation); | |
e0001a05 NC |
2151 | |
2152 | /* Update some already cached values. */ | |
2153 | r_type = ELF32_R_TYPE (rel->r_info); | |
2154 | howto = &elf_howto_table[r_type]; | |
2155 | } | |
2156 | ||
2157 | /* Sanity check the address. */ | |
43cd72b9 | 2158 | if (rel->r_offset >= input_size |
e0001a05 NC |
2159 | && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE) |
2160 | { | |
43cd72b9 BW |
2161 | (*_bfd_error_handler) |
2162 | (_("%B(%A+0x%lx): relocation offset out of range (size=0x%x)"), | |
2163 | input_bfd, input_section, rel->r_offset, input_size); | |
e0001a05 NC |
2164 | bfd_set_error (bfd_error_bad_value); |
2165 | return FALSE; | |
2166 | } | |
2167 | ||
2168 | /* Generate dynamic relocations. */ | |
2169 | if (elf_hash_table (info)->dynamic_sections_created) | |
2170 | { | |
4608f3d9 | 2171 | bfd_boolean dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 | 2172 | |
43cd72b9 | 2173 | if (dynamic_symbol && is_operand_relocation (r_type)) |
e0001a05 NC |
2174 | { |
2175 | /* This is an error. The symbol's real value won't be known | |
2176 | until runtime and it's likely to be out of range anyway. */ | |
2177 | const char *name = h->root.root.string; | |
2178 | error_message = vsprint_msg ("invalid relocation for dynamic " | |
2179 | "symbol", ": %s", | |
2180 | strlen (name) + 2, name); | |
2181 | if (!((*info->callbacks->reloc_dangerous) | |
2182 | (info, error_message, input_bfd, input_section, | |
2183 | rel->r_offset))) | |
2184 | return FALSE; | |
2185 | } | |
2186 | else if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
2187 | && (input_section->flags & SEC_ALLOC) != 0 | |
2188 | && (dynamic_symbol || info->shared)) | |
2189 | { | |
2190 | Elf_Internal_Rela outrel; | |
2191 | bfd_byte *loc; | |
2192 | asection *srel; | |
2193 | ||
2194 | if (dynamic_symbol && r_type == R_XTENSA_PLT) | |
f0e6fdb2 | 2195 | srel = htab->srelplt; |
e0001a05 | 2196 | else |
f0e6fdb2 | 2197 | srel = htab->srelgot; |
e0001a05 NC |
2198 | |
2199 | BFD_ASSERT (srel != NULL); | |
2200 | ||
2201 | outrel.r_offset = | |
2202 | _bfd_elf_section_offset (output_bfd, info, | |
2203 | input_section, rel->r_offset); | |
2204 | ||
2205 | if ((outrel.r_offset | 1) == (bfd_vma) -1) | |
2206 | memset (&outrel, 0, sizeof outrel); | |
2207 | else | |
2208 | { | |
f0578e28 BW |
2209 | outrel.r_offset += (input_section->output_section->vma |
2210 | + input_section->output_offset); | |
e0001a05 | 2211 | |
88d65ad6 BW |
2212 | /* Complain if the relocation is in a read-only section |
2213 | and not in a literal pool. */ | |
2214 | if ((input_section->flags & SEC_READONLY) != 0 | |
2215 | && !elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
3ba3bc8c | 2216 | outrel.r_offset)) |
88d65ad6 BW |
2217 | { |
2218 | error_message = | |
2219 | _("dynamic relocation in read-only section"); | |
2220 | if (!((*info->callbacks->reloc_dangerous) | |
2221 | (info, error_message, input_bfd, input_section, | |
2222 | rel->r_offset))) | |
2223 | return FALSE; | |
2224 | } | |
2225 | ||
e0001a05 NC |
2226 | if (dynamic_symbol) |
2227 | { | |
2228 | outrel.r_addend = rel->r_addend; | |
2229 | rel->r_addend = 0; | |
2230 | ||
2231 | if (r_type == R_XTENSA_32) | |
2232 | { | |
2233 | outrel.r_info = | |
2234 | ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT); | |
2235 | relocation = 0; | |
2236 | } | |
2237 | else /* r_type == R_XTENSA_PLT */ | |
2238 | { | |
2239 | outrel.r_info = | |
2240 | ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT); | |
2241 | ||
2242 | /* Create the PLT entry and set the initial | |
2243 | contents of the literal entry to the address of | |
2244 | the PLT entry. */ | |
43cd72b9 | 2245 | relocation = |
f0e6fdb2 | 2246 | elf_xtensa_create_plt_entry (info, output_bfd, |
e0001a05 NC |
2247 | srel->reloc_count); |
2248 | } | |
2249 | unresolved_reloc = FALSE; | |
2250 | } | |
2251 | else | |
2252 | { | |
2253 | /* Generate a RELATIVE relocation. */ | |
2254 | outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE); | |
2255 | outrel.r_addend = 0; | |
2256 | } | |
2257 | } | |
2258 | ||
2259 | loc = (srel->contents | |
2260 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2261 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2262 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
eea6121a | 2263 | <= srel->size); |
e0001a05 NC |
2264 | } |
2265 | } | |
2266 | ||
2267 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
2268 | because such sections are not SEC_ALLOC and thus ld.so will | |
2269 | not process them. */ | |
2270 | if (unresolved_reloc | |
2271 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 2272 | && h->def_dynamic)) |
bf1747de BW |
2273 | { |
2274 | (*_bfd_error_handler) | |
2275 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
2276 | input_bfd, | |
2277 | input_section, | |
2278 | (long) rel->r_offset, | |
2279 | howto->name, | |
2280 | h->root.root.string); | |
2281 | return FALSE; | |
2282 | } | |
e0001a05 NC |
2283 | |
2284 | /* There's no point in calling bfd_perform_relocation here. | |
2285 | Just go directly to our "special function". */ | |
2286 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2287 | relocation + rel->r_addend, | |
2288 | contents, rel->r_offset, is_weak_undef, | |
2289 | &error_message); | |
43cd72b9 | 2290 | |
9b8c98a4 | 2291 | if (r != bfd_reloc_ok && !warned) |
e0001a05 NC |
2292 | { |
2293 | const char *name; | |
2294 | ||
43cd72b9 | 2295 | BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other); |
7fa3d080 | 2296 | BFD_ASSERT (error_message != NULL); |
e0001a05 | 2297 | |
7fa3d080 | 2298 | if (h) |
e0001a05 NC |
2299 | name = h->root.root.string; |
2300 | else | |
2301 | { | |
2302 | name = bfd_elf_string_from_elf_section | |
2303 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
2304 | if (name && *name == '\0') | |
2305 | name = bfd_section_name (input_bfd, sec); | |
2306 | } | |
2307 | if (name) | |
43cd72b9 BW |
2308 | { |
2309 | if (rel->r_addend == 0) | |
2310 | error_message = vsprint_msg (error_message, ": %s", | |
2311 | strlen (name) + 2, name); | |
2312 | else | |
2313 | error_message = vsprint_msg (error_message, ": (%s+0x%x)", | |
2314 | strlen (name) + 22, | |
0fd3a477 | 2315 | name, (int)rel->r_addend); |
43cd72b9 BW |
2316 | } |
2317 | ||
e0001a05 NC |
2318 | if (!((*info->callbacks->reloc_dangerous) |
2319 | (info, error_message, input_bfd, input_section, | |
2320 | rel->r_offset))) | |
2321 | return FALSE; | |
2322 | } | |
2323 | } | |
2324 | ||
88d65ad6 BW |
2325 | if (lit_table) |
2326 | free (lit_table); | |
2327 | ||
3ba3bc8c BW |
2328 | input_section->reloc_done = TRUE; |
2329 | ||
e0001a05 NC |
2330 | return TRUE; |
2331 | } | |
2332 | ||
2333 | ||
2334 | /* Finish up dynamic symbol handling. There's not much to do here since | |
2335 | the PLT and GOT entries are all set up by relocate_section. */ | |
2336 | ||
2337 | static bfd_boolean | |
7fa3d080 BW |
2338 | elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
2339 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2340 | struct elf_link_hash_entry *h, | |
2341 | Elf_Internal_Sym *sym) | |
e0001a05 | 2342 | { |
bf1747de | 2343 | if (h->needs_plt && !h->def_regular) |
e0001a05 NC |
2344 | { |
2345 | /* Mark the symbol as undefined, rather than as defined in | |
2346 | the .plt section. Leave the value alone. */ | |
2347 | sym->st_shndx = SHN_UNDEF; | |
bf1747de BW |
2348 | /* If the symbol is weak, we do need to clear the value. |
2349 | Otherwise, the PLT entry would provide a definition for | |
2350 | the symbol even if the symbol wasn't defined anywhere, | |
2351 | and so the symbol would never be NULL. */ | |
2352 | if (!h->ref_regular_nonweak) | |
2353 | sym->st_value = 0; | |
e0001a05 NC |
2354 | } |
2355 | ||
2356 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2357 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 2358 | || h == elf_hash_table (info)->hgot) |
e0001a05 NC |
2359 | sym->st_shndx = SHN_ABS; |
2360 | ||
2361 | return TRUE; | |
2362 | } | |
2363 | ||
2364 | ||
2365 | /* Combine adjacent literal table entries in the output. Adjacent | |
2366 | entries within each input section may have been removed during | |
2367 | relaxation, but we repeat the process here, even though it's too late | |
2368 | to shrink the output section, because it's important to minimize the | |
2369 | number of literal table entries to reduce the start-up work for the | |
2370 | runtime linker. Returns the number of remaining table entries or -1 | |
2371 | on error. */ | |
2372 | ||
2373 | static int | |
7fa3d080 BW |
2374 | elf_xtensa_combine_prop_entries (bfd *output_bfd, |
2375 | asection *sxtlit, | |
2376 | asection *sgotloc) | |
e0001a05 | 2377 | { |
e0001a05 NC |
2378 | bfd_byte *contents; |
2379 | property_table_entry *table; | |
e901de89 | 2380 | bfd_size_type section_size, sgotloc_size; |
e0001a05 NC |
2381 | bfd_vma offset; |
2382 | int n, m, num; | |
2383 | ||
eea6121a | 2384 | section_size = sxtlit->size; |
e0001a05 NC |
2385 | BFD_ASSERT (section_size % 8 == 0); |
2386 | num = section_size / 8; | |
2387 | ||
eea6121a | 2388 | sgotloc_size = sgotloc->size; |
e901de89 | 2389 | if (sgotloc_size != section_size) |
b536dc1e BW |
2390 | { |
2391 | (*_bfd_error_handler) | |
43cd72b9 | 2392 | (_("internal inconsistency in size of .got.loc section")); |
b536dc1e BW |
2393 | return -1; |
2394 | } | |
e901de89 | 2395 | |
eea6121a AM |
2396 | table = bfd_malloc (num * sizeof (property_table_entry)); |
2397 | if (table == 0) | |
e0001a05 NC |
2398 | return -1; |
2399 | ||
2400 | /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this | |
2401 | propagates to the output section, where it doesn't really apply and | |
eea6121a | 2402 | where it breaks the following call to bfd_malloc_and_get_section. */ |
e901de89 | 2403 | sxtlit->flags &= ~SEC_IN_MEMORY; |
e0001a05 | 2404 | |
eea6121a AM |
2405 | if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents)) |
2406 | { | |
2407 | if (contents != 0) | |
2408 | free (contents); | |
2409 | free (table); | |
2410 | return -1; | |
2411 | } | |
e0001a05 NC |
2412 | |
2413 | /* There should never be any relocations left at this point, so this | |
2414 | is quite a bit easier than what is done during relaxation. */ | |
2415 | ||
2416 | /* Copy the raw contents into a property table array and sort it. */ | |
2417 | offset = 0; | |
2418 | for (n = 0; n < num; n++) | |
2419 | { | |
2420 | table[n].address = bfd_get_32 (output_bfd, &contents[offset]); | |
2421 | table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]); | |
2422 | offset += 8; | |
2423 | } | |
2424 | qsort (table, num, sizeof (property_table_entry), property_table_compare); | |
2425 | ||
2426 | for (n = 0; n < num; n++) | |
2427 | { | |
2428 | bfd_boolean remove = FALSE; | |
2429 | ||
2430 | if (table[n].size == 0) | |
2431 | remove = TRUE; | |
2432 | else if (n > 0 && | |
2433 | (table[n-1].address + table[n-1].size == table[n].address)) | |
2434 | { | |
2435 | table[n-1].size += table[n].size; | |
2436 | remove = TRUE; | |
2437 | } | |
2438 | ||
2439 | if (remove) | |
2440 | { | |
2441 | for (m = n; m < num - 1; m++) | |
2442 | { | |
2443 | table[m].address = table[m+1].address; | |
2444 | table[m].size = table[m+1].size; | |
2445 | } | |
2446 | ||
2447 | n--; | |
2448 | num--; | |
2449 | } | |
2450 | } | |
2451 | ||
2452 | /* Copy the data back to the raw contents. */ | |
2453 | offset = 0; | |
2454 | for (n = 0; n < num; n++) | |
2455 | { | |
2456 | bfd_put_32 (output_bfd, table[n].address, &contents[offset]); | |
2457 | bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]); | |
2458 | offset += 8; | |
2459 | } | |
2460 | ||
2461 | /* Clear the removed bytes. */ | |
2462 | if ((bfd_size_type) (num * 8) < section_size) | |
b54d4b07 | 2463 | memset (&contents[num * 8], 0, section_size - num * 8); |
e0001a05 | 2464 | |
e901de89 BW |
2465 | if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0, |
2466 | section_size)) | |
e0001a05 NC |
2467 | return -1; |
2468 | ||
e901de89 BW |
2469 | /* Copy the contents to ".got.loc". */ |
2470 | memcpy (sgotloc->contents, contents, section_size); | |
2471 | ||
e0001a05 | 2472 | free (contents); |
b614a702 | 2473 | free (table); |
e0001a05 NC |
2474 | return num; |
2475 | } | |
2476 | ||
2477 | ||
2478 | /* Finish up the dynamic sections. */ | |
2479 | ||
2480 | static bfd_boolean | |
7fa3d080 BW |
2481 | elf_xtensa_finish_dynamic_sections (bfd *output_bfd, |
2482 | struct bfd_link_info *info) | |
e0001a05 | 2483 | { |
f0e6fdb2 | 2484 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 | 2485 | bfd *dynobj; |
e901de89 | 2486 | asection *sdyn, *srelplt, *sgot, *sxtlit, *sgotloc; |
e0001a05 NC |
2487 | Elf32_External_Dyn *dyncon, *dynconend; |
2488 | int num_xtlit_entries; | |
2489 | ||
2490 | if (! elf_hash_table (info)->dynamic_sections_created) | |
2491 | return TRUE; | |
2492 | ||
f0e6fdb2 | 2493 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
2494 | dynobj = elf_hash_table (info)->dynobj; |
2495 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2496 | BFD_ASSERT (sdyn != NULL); | |
2497 | ||
2498 | /* Set the first entry in the global offset table to the address of | |
2499 | the dynamic section. */ | |
f0e6fdb2 | 2500 | sgot = htab->sgot; |
e0001a05 NC |
2501 | if (sgot) |
2502 | { | |
eea6121a | 2503 | BFD_ASSERT (sgot->size == 4); |
e0001a05 | 2504 | if (sdyn == NULL) |
7fa3d080 | 2505 | bfd_put_32 (output_bfd, 0, sgot->contents); |
e0001a05 NC |
2506 | else |
2507 | bfd_put_32 (output_bfd, | |
2508 | sdyn->output_section->vma + sdyn->output_offset, | |
2509 | sgot->contents); | |
2510 | } | |
2511 | ||
f0e6fdb2 | 2512 | srelplt = htab->srelplt; |
7fa3d080 | 2513 | if (srelplt && srelplt->size != 0) |
e0001a05 NC |
2514 | { |
2515 | asection *sgotplt, *srelgot, *spltlittbl; | |
2516 | int chunk, plt_chunks, plt_entries; | |
2517 | Elf_Internal_Rela irela; | |
2518 | bfd_byte *loc; | |
2519 | unsigned rtld_reloc; | |
2520 | ||
f0e6fdb2 BW |
2521 | srelgot = htab->srelgot; |
2522 | spltlittbl = htab->spltlittbl; | |
2523 | BFD_ASSERT (srelgot != NULL && spltlittbl != NULL); | |
e0001a05 NC |
2524 | |
2525 | /* Find the first XTENSA_RTLD relocation. Presumably the rest | |
2526 | of them follow immediately after.... */ | |
2527 | for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++) | |
2528 | { | |
2529 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
2530 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2531 | if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD) | |
2532 | break; | |
2533 | } | |
2534 | BFD_ASSERT (rtld_reloc < srelgot->reloc_count); | |
2535 | ||
eea6121a | 2536 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
2537 | plt_chunks = |
2538 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
2539 | ||
2540 | for (chunk = 0; chunk < plt_chunks; chunk++) | |
2541 | { | |
2542 | int chunk_entries = 0; | |
2543 | ||
f0e6fdb2 | 2544 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
e0001a05 NC |
2545 | BFD_ASSERT (sgotplt != NULL); |
2546 | ||
2547 | /* Emit special RTLD relocations for the first two entries in | |
2548 | each chunk of the .got.plt section. */ | |
2549 | ||
2550 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
2551 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2552 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
2553 | irela.r_offset = (sgotplt->output_section->vma | |
2554 | + sgotplt->output_offset); | |
2555 | irela.r_addend = 1; /* tell rtld to set value to resolver function */ | |
2556 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
2557 | rtld_reloc += 1; | |
2558 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
2559 | ||
2560 | /* Next literal immediately follows the first. */ | |
2561 | loc += sizeof (Elf32_External_Rela); | |
2562 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
2563 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
2564 | irela.r_offset = (sgotplt->output_section->vma | |
2565 | + sgotplt->output_offset + 4); | |
2566 | /* Tell rtld to set value to object's link map. */ | |
2567 | irela.r_addend = 2; | |
2568 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
2569 | rtld_reloc += 1; | |
2570 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
2571 | ||
2572 | /* Fill in the literal table. */ | |
2573 | if (chunk < plt_chunks - 1) | |
2574 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
2575 | else | |
2576 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
2577 | ||
eea6121a | 2578 | BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size); |
e0001a05 NC |
2579 | bfd_put_32 (output_bfd, |
2580 | sgotplt->output_section->vma + sgotplt->output_offset, | |
2581 | spltlittbl->contents + (chunk * 8) + 0); | |
2582 | bfd_put_32 (output_bfd, | |
2583 | 8 + (chunk_entries * 4), | |
2584 | spltlittbl->contents + (chunk * 8) + 4); | |
2585 | } | |
2586 | ||
2587 | /* All the dynamic relocations have been emitted at this point. | |
2588 | Make sure the relocation sections are the correct size. */ | |
eea6121a AM |
2589 | if (srelgot->size != (sizeof (Elf32_External_Rela) |
2590 | * srelgot->reloc_count) | |
2591 | || srelplt->size != (sizeof (Elf32_External_Rela) | |
2592 | * srelplt->reloc_count)) | |
e0001a05 NC |
2593 | abort (); |
2594 | ||
2595 | /* The .xt.lit.plt section has just been modified. This must | |
2596 | happen before the code below which combines adjacent literal | |
2597 | table entries, and the .xt.lit.plt contents have to be forced to | |
2598 | the output here. */ | |
2599 | if (! bfd_set_section_contents (output_bfd, | |
2600 | spltlittbl->output_section, | |
2601 | spltlittbl->contents, | |
2602 | spltlittbl->output_offset, | |
eea6121a | 2603 | spltlittbl->size)) |
e0001a05 NC |
2604 | return FALSE; |
2605 | /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */ | |
2606 | spltlittbl->flags &= ~SEC_HAS_CONTENTS; | |
2607 | } | |
2608 | ||
2609 | /* Combine adjacent literal table entries. */ | |
1049f94e | 2610 | BFD_ASSERT (! info->relocatable); |
e901de89 | 2611 | sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit"); |
f0e6fdb2 | 2612 | sgotloc = htab->sgotloc; |
b536dc1e | 2613 | BFD_ASSERT (sxtlit && sgotloc); |
e901de89 BW |
2614 | num_xtlit_entries = |
2615 | elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc); | |
e0001a05 NC |
2616 | if (num_xtlit_entries < 0) |
2617 | return FALSE; | |
2618 | ||
2619 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 2620 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
e0001a05 NC |
2621 | for (; dyncon < dynconend; dyncon++) |
2622 | { | |
2623 | Elf_Internal_Dyn dyn; | |
e0001a05 NC |
2624 | |
2625 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2626 | ||
2627 | switch (dyn.d_tag) | |
2628 | { | |
2629 | default: | |
2630 | break; | |
2631 | ||
2632 | case DT_XTENSA_GOT_LOC_SZ: | |
e0001a05 NC |
2633 | dyn.d_un.d_val = num_xtlit_entries; |
2634 | break; | |
2635 | ||
2636 | case DT_XTENSA_GOT_LOC_OFF: | |
f0e6fdb2 BW |
2637 | dyn.d_un.d_ptr = htab->sgotloc->vma; |
2638 | break; | |
2639 | ||
e0001a05 | 2640 | case DT_PLTGOT: |
f0e6fdb2 BW |
2641 | dyn.d_un.d_ptr = htab->sgot->vma; |
2642 | break; | |
2643 | ||
e0001a05 | 2644 | case DT_JMPREL: |
f0e6fdb2 | 2645 | dyn.d_un.d_ptr = htab->srelplt->vma; |
e0001a05 NC |
2646 | break; |
2647 | ||
2648 | case DT_PLTRELSZ: | |
f0e6fdb2 | 2649 | dyn.d_un.d_val = htab->srelplt->size; |
e0001a05 NC |
2650 | break; |
2651 | ||
2652 | case DT_RELASZ: | |
2653 | /* Adjust RELASZ to not include JMPREL. This matches what | |
2654 | glibc expects and what is done for several other ELF | |
2655 | targets (e.g., i386, alpha), but the "correct" behavior | |
2656 | seems to be unresolved. Since the linker script arranges | |
2657 | for .rela.plt to follow all other relocation sections, we | |
2658 | don't have to worry about changing the DT_RELA entry. */ | |
f0e6fdb2 BW |
2659 | if (htab->srelplt) |
2660 | dyn.d_un.d_val -= htab->srelplt->size; | |
e0001a05 NC |
2661 | break; |
2662 | } | |
2663 | ||
2664 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2665 | } | |
2666 | ||
2667 | return TRUE; | |
2668 | } | |
2669 | ||
2670 | \f | |
2671 | /* Functions for dealing with the e_flags field. */ | |
2672 | ||
2673 | /* Merge backend specific data from an object file to the output | |
2674 | object file when linking. */ | |
2675 | ||
2676 | static bfd_boolean | |
7fa3d080 | 2677 | elf_xtensa_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
e0001a05 NC |
2678 | { |
2679 | unsigned out_mach, in_mach; | |
2680 | flagword out_flag, in_flag; | |
2681 | ||
2682 | /* Check if we have the same endianess. */ | |
2683 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
2684 | return FALSE; | |
2685 | ||
2686 | /* Don't even pretend to support mixed-format linking. */ | |
2687 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2688 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2689 | return FALSE; | |
2690 | ||
2691 | out_flag = elf_elfheader (obfd)->e_flags; | |
2692 | in_flag = elf_elfheader (ibfd)->e_flags; | |
2693 | ||
2694 | out_mach = out_flag & EF_XTENSA_MACH; | |
2695 | in_mach = in_flag & EF_XTENSA_MACH; | |
43cd72b9 | 2696 | if (out_mach != in_mach) |
e0001a05 NC |
2697 | { |
2698 | (*_bfd_error_handler) | |
43cd72b9 | 2699 | (_("%B: incompatible machine type. Output is 0x%x. Input is 0x%x"), |
d003868e | 2700 | ibfd, out_mach, in_mach); |
e0001a05 NC |
2701 | bfd_set_error (bfd_error_wrong_format); |
2702 | return FALSE; | |
2703 | } | |
2704 | ||
2705 | if (! elf_flags_init (obfd)) | |
2706 | { | |
2707 | elf_flags_init (obfd) = TRUE; | |
2708 | elf_elfheader (obfd)->e_flags = in_flag; | |
43cd72b9 | 2709 | |
e0001a05 NC |
2710 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
2711 | && bfd_get_arch_info (obfd)->the_default) | |
2712 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
2713 | bfd_get_mach (ibfd)); | |
43cd72b9 | 2714 | |
e0001a05 NC |
2715 | return TRUE; |
2716 | } | |
2717 | ||
43cd72b9 BW |
2718 | if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN)) |
2719 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN); | |
e0001a05 | 2720 | |
43cd72b9 BW |
2721 | if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT)) |
2722 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT); | |
e0001a05 NC |
2723 | |
2724 | return TRUE; | |
2725 | } | |
2726 | ||
2727 | ||
2728 | static bfd_boolean | |
7fa3d080 | 2729 | elf_xtensa_set_private_flags (bfd *abfd, flagword flags) |
e0001a05 NC |
2730 | { |
2731 | BFD_ASSERT (!elf_flags_init (abfd) | |
2732 | || elf_elfheader (abfd)->e_flags == flags); | |
2733 | ||
2734 | elf_elfheader (abfd)->e_flags |= flags; | |
2735 | elf_flags_init (abfd) = TRUE; | |
2736 | ||
2737 | return TRUE; | |
2738 | } | |
2739 | ||
2740 | ||
e0001a05 | 2741 | static bfd_boolean |
7fa3d080 | 2742 | elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg) |
e0001a05 NC |
2743 | { |
2744 | FILE *f = (FILE *) farg; | |
2745 | flagword e_flags = elf_elfheader (abfd)->e_flags; | |
2746 | ||
2747 | fprintf (f, "\nXtensa header:\n"); | |
43cd72b9 | 2748 | if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH) |
e0001a05 NC |
2749 | fprintf (f, "\nMachine = Base\n"); |
2750 | else | |
2751 | fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH); | |
2752 | ||
2753 | fprintf (f, "Insn tables = %s\n", | |
2754 | (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false"); | |
2755 | ||
2756 | fprintf (f, "Literal tables = %s\n", | |
2757 | (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false"); | |
2758 | ||
2759 | return _bfd_elf_print_private_bfd_data (abfd, farg); | |
2760 | } | |
2761 | ||
2762 | ||
2763 | /* Set the right machine number for an Xtensa ELF file. */ | |
2764 | ||
2765 | static bfd_boolean | |
7fa3d080 | 2766 | elf_xtensa_object_p (bfd *abfd) |
e0001a05 NC |
2767 | { |
2768 | int mach; | |
2769 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH; | |
2770 | ||
2771 | switch (arch) | |
2772 | { | |
2773 | case E_XTENSA_MACH: | |
2774 | mach = bfd_mach_xtensa; | |
2775 | break; | |
2776 | default: | |
2777 | return FALSE; | |
2778 | } | |
2779 | ||
2780 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach); | |
2781 | return TRUE; | |
2782 | } | |
2783 | ||
2784 | ||
2785 | /* The final processing done just before writing out an Xtensa ELF object | |
2786 | file. This gets the Xtensa architecture right based on the machine | |
2787 | number. */ | |
2788 | ||
2789 | static void | |
7fa3d080 BW |
2790 | elf_xtensa_final_write_processing (bfd *abfd, |
2791 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
e0001a05 NC |
2792 | { |
2793 | int mach; | |
2794 | unsigned long val; | |
2795 | ||
2796 | switch (mach = bfd_get_mach (abfd)) | |
2797 | { | |
2798 | case bfd_mach_xtensa: | |
2799 | val = E_XTENSA_MACH; | |
2800 | break; | |
2801 | default: | |
2802 | return; | |
2803 | } | |
2804 | ||
2805 | elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH); | |
2806 | elf_elfheader (abfd)->e_flags |= val; | |
2807 | } | |
2808 | ||
2809 | ||
2810 | static enum elf_reloc_type_class | |
7fa3d080 | 2811 | elf_xtensa_reloc_type_class (const Elf_Internal_Rela *rela) |
e0001a05 NC |
2812 | { |
2813 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2814 | { | |
2815 | case R_XTENSA_RELATIVE: | |
2816 | return reloc_class_relative; | |
2817 | case R_XTENSA_JMP_SLOT: | |
2818 | return reloc_class_plt; | |
2819 | default: | |
2820 | return reloc_class_normal; | |
2821 | } | |
2822 | } | |
2823 | ||
2824 | \f | |
2825 | static bfd_boolean | |
7fa3d080 BW |
2826 | elf_xtensa_discard_info_for_section (bfd *abfd, |
2827 | struct elf_reloc_cookie *cookie, | |
2828 | struct bfd_link_info *info, | |
2829 | asection *sec) | |
e0001a05 NC |
2830 | { |
2831 | bfd_byte *contents; | |
2832 | bfd_vma section_size; | |
2833 | bfd_vma offset, actual_offset; | |
1d25768e BW |
2834 | bfd_size_type removed_bytes = 0; |
2835 | bfd_size_type entry_size; | |
e0001a05 NC |
2836 | |
2837 | if (sec->output_section | |
2838 | && bfd_is_abs_section (sec->output_section)) | |
2839 | return FALSE; | |
2840 | ||
1d25768e BW |
2841 | if (xtensa_is_proptable_section (sec)) |
2842 | entry_size = 12; | |
2843 | else | |
2844 | entry_size = 8; | |
2845 | ||
2846 | section_size = sec->size; | |
2847 | if (section_size == 0 || section_size % entry_size != 0) | |
2848 | return FALSE; | |
2849 | ||
e0001a05 NC |
2850 | contents = retrieve_contents (abfd, sec, info->keep_memory); |
2851 | if (!contents) | |
2852 | return FALSE; | |
2853 | ||
2854 | cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory); | |
2855 | if (!cookie->rels) | |
2856 | { | |
2857 | release_contents (sec, contents); | |
2858 | return FALSE; | |
2859 | } | |
2860 | ||
1d25768e BW |
2861 | /* Sort the relocations. They should already be in order when |
2862 | relaxation is enabled, but it might not be. */ | |
2863 | qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
2864 | internal_reloc_compare); | |
2865 | ||
e0001a05 NC |
2866 | cookie->rel = cookie->rels; |
2867 | cookie->relend = cookie->rels + sec->reloc_count; | |
2868 | ||
1d25768e | 2869 | for (offset = 0; offset < section_size; offset += entry_size) |
e0001a05 NC |
2870 | { |
2871 | actual_offset = offset - removed_bytes; | |
2872 | ||
2873 | /* The ...symbol_deleted_p function will skip over relocs but it | |
2874 | won't adjust their offsets, so do that here. */ | |
2875 | while (cookie->rel < cookie->relend | |
2876 | && cookie->rel->r_offset < offset) | |
2877 | { | |
2878 | cookie->rel->r_offset -= removed_bytes; | |
2879 | cookie->rel++; | |
2880 | } | |
2881 | ||
2882 | while (cookie->rel < cookie->relend | |
2883 | && cookie->rel->r_offset == offset) | |
2884 | { | |
c152c796 | 2885 | if (bfd_elf_reloc_symbol_deleted_p (offset, cookie)) |
e0001a05 NC |
2886 | { |
2887 | /* Remove the table entry. (If the reloc type is NONE, then | |
2888 | the entry has already been merged with another and deleted | |
2889 | during relaxation.) */ | |
2890 | if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE) | |
2891 | { | |
2892 | /* Shift the contents up. */ | |
1d25768e | 2893 | if (offset + entry_size < section_size) |
e0001a05 | 2894 | memmove (&contents[actual_offset], |
1d25768e BW |
2895 | &contents[actual_offset + entry_size], |
2896 | section_size - offset - entry_size); | |
2897 | removed_bytes += entry_size; | |
e0001a05 NC |
2898 | } |
2899 | ||
2900 | /* Remove this relocation. */ | |
2901 | cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
2902 | } | |
2903 | ||
2904 | /* Adjust the relocation offset for previous removals. This | |
2905 | should not be done before calling ...symbol_deleted_p | |
2906 | because it might mess up the offset comparisons there. | |
2907 | Make sure the offset doesn't underflow in the case where | |
2908 | the first entry is removed. */ | |
2909 | if (cookie->rel->r_offset >= removed_bytes) | |
2910 | cookie->rel->r_offset -= removed_bytes; | |
2911 | else | |
2912 | cookie->rel->r_offset = 0; | |
2913 | ||
2914 | cookie->rel++; | |
2915 | } | |
2916 | } | |
2917 | ||
2918 | if (removed_bytes != 0) | |
2919 | { | |
2920 | /* Adjust any remaining relocs (shouldn't be any). */ | |
2921 | for (; cookie->rel < cookie->relend; cookie->rel++) | |
2922 | { | |
2923 | if (cookie->rel->r_offset >= removed_bytes) | |
2924 | cookie->rel->r_offset -= removed_bytes; | |
2925 | else | |
2926 | cookie->rel->r_offset = 0; | |
2927 | } | |
2928 | ||
2929 | /* Clear the removed bytes. */ | |
2930 | memset (&contents[section_size - removed_bytes], 0, removed_bytes); | |
2931 | ||
2932 | pin_contents (sec, contents); | |
2933 | pin_internal_relocs (sec, cookie->rels); | |
2934 | ||
eea6121a AM |
2935 | /* Shrink size. */ |
2936 | sec->size = section_size - removed_bytes; | |
b536dc1e BW |
2937 | |
2938 | if (xtensa_is_littable_section (sec)) | |
2939 | { | |
f0e6fdb2 BW |
2940 | asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc; |
2941 | if (sgotloc) | |
2942 | sgotloc->size -= removed_bytes; | |
b536dc1e | 2943 | } |
e0001a05 NC |
2944 | } |
2945 | else | |
2946 | { | |
2947 | release_contents (sec, contents); | |
2948 | release_internal_relocs (sec, cookie->rels); | |
2949 | } | |
2950 | ||
2951 | return (removed_bytes != 0); | |
2952 | } | |
2953 | ||
2954 | ||
2955 | static bfd_boolean | |
7fa3d080 BW |
2956 | elf_xtensa_discard_info (bfd *abfd, |
2957 | struct elf_reloc_cookie *cookie, | |
2958 | struct bfd_link_info *info) | |
e0001a05 NC |
2959 | { |
2960 | asection *sec; | |
2961 | bfd_boolean changed = FALSE; | |
2962 | ||
2963 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
2964 | { | |
2965 | if (xtensa_is_property_section (sec)) | |
2966 | { | |
2967 | if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)) | |
2968 | changed = TRUE; | |
2969 | } | |
2970 | } | |
2971 | ||
2972 | return changed; | |
2973 | } | |
2974 | ||
2975 | ||
2976 | static bfd_boolean | |
7fa3d080 | 2977 | elf_xtensa_ignore_discarded_relocs (asection *sec) |
e0001a05 NC |
2978 | { |
2979 | return xtensa_is_property_section (sec); | |
2980 | } | |
2981 | ||
a77dc2cc BW |
2982 | |
2983 | static unsigned int | |
2984 | elf_xtensa_action_discarded (asection *sec) | |
2985 | { | |
2986 | if (strcmp (".xt_except_table", sec->name) == 0) | |
2987 | return 0; | |
2988 | ||
2989 | if (strcmp (".xt_except_desc", sec->name) == 0) | |
2990 | return 0; | |
2991 | ||
2992 | return _bfd_elf_default_action_discarded (sec); | |
2993 | } | |
2994 | ||
e0001a05 NC |
2995 | \f |
2996 | /* Support for core dump NOTE sections. */ | |
2997 | ||
2998 | static bfd_boolean | |
7fa3d080 | 2999 | elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3000 | { |
3001 | int offset; | |
eea6121a | 3002 | unsigned int size; |
e0001a05 NC |
3003 | |
3004 | /* The size for Xtensa is variable, so don't try to recognize the format | |
3005 | based on the size. Just assume this is GNU/Linux. */ | |
3006 | ||
3007 | /* pr_cursig */ | |
3008 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3009 | ||
3010 | /* pr_pid */ | |
3011 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3012 | ||
3013 | /* pr_reg */ | |
3014 | offset = 72; | |
eea6121a | 3015 | size = note->descsz - offset - 4; |
e0001a05 NC |
3016 | |
3017 | /* Make a ".reg/999" section. */ | |
3018 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3019 | size, note->descpos + offset); |
e0001a05 NC |
3020 | } |
3021 | ||
3022 | ||
3023 | static bfd_boolean | |
7fa3d080 | 3024 | elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3025 | { |
3026 | switch (note->descsz) | |
3027 | { | |
3028 | default: | |
3029 | return FALSE; | |
3030 | ||
3031 | case 128: /* GNU/Linux elf_prpsinfo */ | |
3032 | elf_tdata (abfd)->core_program | |
3033 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
3034 | elf_tdata (abfd)->core_command | |
3035 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
3036 | } | |
3037 | ||
3038 | /* Note that for some reason, a spurious space is tacked | |
3039 | onto the end of the args in some (at least one anyway) | |
3040 | implementations, so strip it off if it exists. */ | |
3041 | ||
3042 | { | |
3043 | char *command = elf_tdata (abfd)->core_command; | |
3044 | int n = strlen (command); | |
3045 | ||
3046 | if (0 < n && command[n - 1] == ' ') | |
3047 | command[n - 1] = '\0'; | |
3048 | } | |
3049 | ||
3050 | return TRUE; | |
3051 | } | |
3052 | ||
3053 | \f | |
3054 | /* Generic Xtensa configurability stuff. */ | |
3055 | ||
3056 | static xtensa_opcode callx0_op = XTENSA_UNDEFINED; | |
3057 | static xtensa_opcode callx4_op = XTENSA_UNDEFINED; | |
3058 | static xtensa_opcode callx8_op = XTENSA_UNDEFINED; | |
3059 | static xtensa_opcode callx12_op = XTENSA_UNDEFINED; | |
3060 | static xtensa_opcode call0_op = XTENSA_UNDEFINED; | |
3061 | static xtensa_opcode call4_op = XTENSA_UNDEFINED; | |
3062 | static xtensa_opcode call8_op = XTENSA_UNDEFINED; | |
3063 | static xtensa_opcode call12_op = XTENSA_UNDEFINED; | |
3064 | ||
3065 | static void | |
7fa3d080 | 3066 | init_call_opcodes (void) |
e0001a05 NC |
3067 | { |
3068 | if (callx0_op == XTENSA_UNDEFINED) | |
3069 | { | |
3070 | callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0"); | |
3071 | callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4"); | |
3072 | callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8"); | |
3073 | callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12"); | |
3074 | call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0"); | |
3075 | call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4"); | |
3076 | call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8"); | |
3077 | call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12"); | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | ||
3082 | static bfd_boolean | |
7fa3d080 | 3083 | is_indirect_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3084 | { |
3085 | init_call_opcodes (); | |
3086 | return (opcode == callx0_op | |
3087 | || opcode == callx4_op | |
3088 | || opcode == callx8_op | |
3089 | || opcode == callx12_op); | |
3090 | } | |
3091 | ||
3092 | ||
3093 | static bfd_boolean | |
7fa3d080 | 3094 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3095 | { |
3096 | init_call_opcodes (); | |
3097 | return (opcode == call0_op | |
3098 | || opcode == call4_op | |
3099 | || opcode == call8_op | |
3100 | || opcode == call12_op); | |
3101 | } | |
3102 | ||
3103 | ||
3104 | static bfd_boolean | |
7fa3d080 | 3105 | is_windowed_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3106 | { |
3107 | init_call_opcodes (); | |
3108 | return (opcode == call4_op | |
3109 | || opcode == call8_op | |
3110 | || opcode == call12_op | |
3111 | || opcode == callx4_op | |
3112 | || opcode == callx8_op | |
3113 | || opcode == callx12_op); | |
3114 | } | |
3115 | ||
3116 | ||
43cd72b9 BW |
3117 | static xtensa_opcode |
3118 | get_const16_opcode (void) | |
3119 | { | |
3120 | static bfd_boolean done_lookup = FALSE; | |
3121 | static xtensa_opcode const16_opcode = XTENSA_UNDEFINED; | |
3122 | if (!done_lookup) | |
3123 | { | |
3124 | const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16"); | |
3125 | done_lookup = TRUE; | |
3126 | } | |
3127 | return const16_opcode; | |
3128 | } | |
3129 | ||
3130 | ||
e0001a05 NC |
3131 | static xtensa_opcode |
3132 | get_l32r_opcode (void) | |
3133 | { | |
3134 | static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED; | |
43cd72b9 BW |
3135 | static bfd_boolean done_lookup = FALSE; |
3136 | ||
3137 | if (!done_lookup) | |
e0001a05 NC |
3138 | { |
3139 | l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r"); | |
43cd72b9 | 3140 | done_lookup = TRUE; |
e0001a05 NC |
3141 | } |
3142 | return l32r_opcode; | |
3143 | } | |
3144 | ||
3145 | ||
3146 | static bfd_vma | |
7fa3d080 | 3147 | l32r_offset (bfd_vma addr, bfd_vma pc) |
e0001a05 NC |
3148 | { |
3149 | bfd_vma offset; | |
3150 | ||
3151 | offset = addr - ((pc+3) & -4); | |
3152 | BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0); | |
3153 | offset = (signed int) offset >> 2; | |
3154 | BFD_ASSERT ((signed int) offset >> 16 == -1); | |
3155 | return offset; | |
3156 | } | |
3157 | ||
3158 | ||
e0001a05 | 3159 | static int |
7fa3d080 | 3160 | get_relocation_opnd (xtensa_opcode opcode, int r_type) |
e0001a05 | 3161 | { |
43cd72b9 BW |
3162 | xtensa_isa isa = xtensa_default_isa; |
3163 | int last_immed, last_opnd, opi; | |
3164 | ||
3165 | if (opcode == XTENSA_UNDEFINED) | |
3166 | return XTENSA_UNDEFINED; | |
3167 | ||
3168 | /* Find the last visible PC-relative immediate operand for the opcode. | |
3169 | If there are no PC-relative immediates, then choose the last visible | |
3170 | immediate; otherwise, fail and return XTENSA_UNDEFINED. */ | |
3171 | last_immed = XTENSA_UNDEFINED; | |
3172 | last_opnd = xtensa_opcode_num_operands (isa, opcode); | |
3173 | for (opi = last_opnd - 1; opi >= 0; opi--) | |
3174 | { | |
3175 | if (xtensa_operand_is_visible (isa, opcode, opi) == 0) | |
3176 | continue; | |
3177 | if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1) | |
3178 | { | |
3179 | last_immed = opi; | |
3180 | break; | |
3181 | } | |
3182 | if (last_immed == XTENSA_UNDEFINED | |
3183 | && xtensa_operand_is_register (isa, opcode, opi) == 0) | |
3184 | last_immed = opi; | |
3185 | } | |
3186 | if (last_immed < 0) | |
3187 | return XTENSA_UNDEFINED; | |
3188 | ||
3189 | /* If the operand number was specified in an old-style relocation, | |
3190 | check for consistency with the operand computed above. */ | |
3191 | if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2) | |
3192 | { | |
3193 | int reloc_opnd = r_type - R_XTENSA_OP0; | |
3194 | if (reloc_opnd != last_immed) | |
3195 | return XTENSA_UNDEFINED; | |
3196 | } | |
3197 | ||
3198 | return last_immed; | |
3199 | } | |
3200 | ||
3201 | ||
3202 | int | |
7fa3d080 | 3203 | get_relocation_slot (int r_type) |
43cd72b9 BW |
3204 | { |
3205 | switch (r_type) | |
3206 | { | |
3207 | case R_XTENSA_OP0: | |
3208 | case R_XTENSA_OP1: | |
3209 | case R_XTENSA_OP2: | |
3210 | return 0; | |
3211 | ||
3212 | default: | |
3213 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3214 | return r_type - R_XTENSA_SLOT0_OP; | |
3215 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3216 | return r_type - R_XTENSA_SLOT0_ALT; | |
3217 | break; | |
3218 | } | |
3219 | ||
3220 | return XTENSA_UNDEFINED; | |
e0001a05 NC |
3221 | } |
3222 | ||
3223 | ||
3224 | /* Get the opcode for a relocation. */ | |
3225 | ||
3226 | static xtensa_opcode | |
7fa3d080 BW |
3227 | get_relocation_opcode (bfd *abfd, |
3228 | asection *sec, | |
3229 | bfd_byte *contents, | |
3230 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3231 | { |
3232 | static xtensa_insnbuf ibuff = NULL; | |
43cd72b9 | 3233 | static xtensa_insnbuf sbuff = NULL; |
e0001a05 | 3234 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
3235 | xtensa_format fmt; |
3236 | int slot; | |
e0001a05 NC |
3237 | |
3238 | if (contents == NULL) | |
3239 | return XTENSA_UNDEFINED; | |
3240 | ||
43cd72b9 | 3241 | if (bfd_get_section_limit (abfd, sec) <= irel->r_offset) |
e0001a05 NC |
3242 | return XTENSA_UNDEFINED; |
3243 | ||
3244 | if (ibuff == NULL) | |
43cd72b9 BW |
3245 | { |
3246 | ibuff = xtensa_insnbuf_alloc (isa); | |
3247 | sbuff = xtensa_insnbuf_alloc (isa); | |
3248 | } | |
3249 | ||
e0001a05 | 3250 | /* Decode the instruction. */ |
43cd72b9 BW |
3251 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset], |
3252 | sec->size - irel->r_offset); | |
3253 | fmt = xtensa_format_decode (isa, ibuff); | |
3254 | slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info)); | |
3255 | if (slot == XTENSA_UNDEFINED) | |
3256 | return XTENSA_UNDEFINED; | |
3257 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); | |
3258 | return xtensa_opcode_decode (isa, fmt, slot, sbuff); | |
e0001a05 NC |
3259 | } |
3260 | ||
3261 | ||
3262 | bfd_boolean | |
7fa3d080 BW |
3263 | is_l32r_relocation (bfd *abfd, |
3264 | asection *sec, | |
3265 | bfd_byte *contents, | |
3266 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3267 | { |
3268 | xtensa_opcode opcode; | |
43cd72b9 | 3269 | if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info))) |
e0001a05 | 3270 | return FALSE; |
43cd72b9 | 3271 | opcode = get_relocation_opcode (abfd, sec, contents, irel); |
e0001a05 NC |
3272 | return (opcode == get_l32r_opcode ()); |
3273 | } | |
3274 | ||
e0001a05 | 3275 | |
43cd72b9 | 3276 | static bfd_size_type |
7fa3d080 BW |
3277 | get_asm_simplify_size (bfd_byte *contents, |
3278 | bfd_size_type content_len, | |
3279 | bfd_size_type offset) | |
e0001a05 | 3280 | { |
43cd72b9 | 3281 | bfd_size_type insnlen, size = 0; |
e0001a05 | 3282 | |
43cd72b9 BW |
3283 | /* Decode the size of the next two instructions. */ |
3284 | insnlen = insn_decode_len (contents, content_len, offset); | |
3285 | if (insnlen == 0) | |
3286 | return 0; | |
e0001a05 | 3287 | |
43cd72b9 | 3288 | size += insnlen; |
e0001a05 | 3289 | |
43cd72b9 BW |
3290 | insnlen = insn_decode_len (contents, content_len, offset + size); |
3291 | if (insnlen == 0) | |
3292 | return 0; | |
e0001a05 | 3293 | |
43cd72b9 BW |
3294 | size += insnlen; |
3295 | return size; | |
3296 | } | |
e0001a05 | 3297 | |
43cd72b9 BW |
3298 | |
3299 | bfd_boolean | |
7fa3d080 | 3300 | is_alt_relocation (int r_type) |
43cd72b9 BW |
3301 | { |
3302 | return (r_type >= R_XTENSA_SLOT0_ALT | |
3303 | && r_type <= R_XTENSA_SLOT14_ALT); | |
e0001a05 NC |
3304 | } |
3305 | ||
3306 | ||
43cd72b9 | 3307 | bfd_boolean |
7fa3d080 | 3308 | is_operand_relocation (int r_type) |
e0001a05 | 3309 | { |
43cd72b9 BW |
3310 | switch (r_type) |
3311 | { | |
3312 | case R_XTENSA_OP0: | |
3313 | case R_XTENSA_OP1: | |
3314 | case R_XTENSA_OP2: | |
3315 | return TRUE; | |
e0001a05 | 3316 | |
43cd72b9 BW |
3317 | default: |
3318 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3319 | return TRUE; | |
3320 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3321 | return TRUE; | |
3322 | break; | |
3323 | } | |
e0001a05 | 3324 | |
43cd72b9 | 3325 | return FALSE; |
e0001a05 NC |
3326 | } |
3327 | ||
43cd72b9 BW |
3328 | |
3329 | #define MIN_INSN_LENGTH 2 | |
e0001a05 | 3330 | |
43cd72b9 BW |
3331 | /* Return 0 if it fails to decode. */ |
3332 | ||
3333 | bfd_size_type | |
7fa3d080 BW |
3334 | insn_decode_len (bfd_byte *contents, |
3335 | bfd_size_type content_len, | |
3336 | bfd_size_type offset) | |
e0001a05 | 3337 | { |
43cd72b9 BW |
3338 | int insn_len; |
3339 | xtensa_isa isa = xtensa_default_isa; | |
3340 | xtensa_format fmt; | |
3341 | static xtensa_insnbuf ibuff = NULL; | |
e0001a05 | 3342 | |
43cd72b9 BW |
3343 | if (offset + MIN_INSN_LENGTH > content_len) |
3344 | return 0; | |
e0001a05 | 3345 | |
43cd72b9 BW |
3346 | if (ibuff == NULL) |
3347 | ibuff = xtensa_insnbuf_alloc (isa); | |
3348 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset], | |
3349 | content_len - offset); | |
3350 | fmt = xtensa_format_decode (isa, ibuff); | |
3351 | if (fmt == XTENSA_UNDEFINED) | |
3352 | return 0; | |
3353 | insn_len = xtensa_format_length (isa, fmt); | |
3354 | if (insn_len == XTENSA_UNDEFINED) | |
3355 | return 0; | |
3356 | return insn_len; | |
e0001a05 NC |
3357 | } |
3358 | ||
3359 | ||
43cd72b9 BW |
3360 | /* Decode the opcode for a single slot instruction. |
3361 | Return 0 if it fails to decode or the instruction is multi-slot. */ | |
e0001a05 | 3362 | |
43cd72b9 | 3363 | xtensa_opcode |
7fa3d080 BW |
3364 | insn_decode_opcode (bfd_byte *contents, |
3365 | bfd_size_type content_len, | |
3366 | bfd_size_type offset, | |
3367 | int slot) | |
e0001a05 | 3368 | { |
e0001a05 | 3369 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
3370 | xtensa_format fmt; |
3371 | static xtensa_insnbuf insnbuf = NULL; | |
3372 | static xtensa_insnbuf slotbuf = NULL; | |
3373 | ||
3374 | if (offset + MIN_INSN_LENGTH > content_len) | |
e0001a05 NC |
3375 | return XTENSA_UNDEFINED; |
3376 | ||
3377 | if (insnbuf == NULL) | |
43cd72b9 BW |
3378 | { |
3379 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3380 | slotbuf = xtensa_insnbuf_alloc (isa); | |
3381 | } | |
3382 | ||
3383 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3384 | content_len - offset); | |
3385 | fmt = xtensa_format_decode (isa, insnbuf); | |
3386 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 3387 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
3388 | |
3389 | if (slot >= xtensa_format_num_slots (isa, fmt)) | |
e0001a05 | 3390 | return XTENSA_UNDEFINED; |
e0001a05 | 3391 | |
43cd72b9 BW |
3392 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
3393 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
3394 | } | |
e0001a05 | 3395 | |
e0001a05 | 3396 | |
43cd72b9 BW |
3397 | /* The offset is the offset in the contents. |
3398 | The address is the address of that offset. */ | |
e0001a05 | 3399 | |
43cd72b9 | 3400 | static bfd_boolean |
7fa3d080 BW |
3401 | check_branch_target_aligned (bfd_byte *contents, |
3402 | bfd_size_type content_length, | |
3403 | bfd_vma offset, | |
3404 | bfd_vma address) | |
43cd72b9 BW |
3405 | { |
3406 | bfd_size_type insn_len = insn_decode_len (contents, content_length, offset); | |
3407 | if (insn_len == 0) | |
3408 | return FALSE; | |
3409 | return check_branch_target_aligned_address (address, insn_len); | |
3410 | } | |
e0001a05 | 3411 | |
e0001a05 | 3412 | |
43cd72b9 | 3413 | static bfd_boolean |
7fa3d080 BW |
3414 | check_loop_aligned (bfd_byte *contents, |
3415 | bfd_size_type content_length, | |
3416 | bfd_vma offset, | |
3417 | bfd_vma address) | |
e0001a05 | 3418 | { |
43cd72b9 | 3419 | bfd_size_type loop_len, insn_len; |
64b607e6 | 3420 | xtensa_opcode opcode; |
e0001a05 | 3421 | |
64b607e6 BW |
3422 | opcode = insn_decode_opcode (contents, content_length, offset, 0); |
3423 | if (opcode == XTENSA_UNDEFINED | |
3424 | || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1) | |
3425 | { | |
3426 | BFD_ASSERT (FALSE); | |
3427 | return FALSE; | |
3428 | } | |
3429 | ||
43cd72b9 | 3430 | loop_len = insn_decode_len (contents, content_length, offset); |
43cd72b9 | 3431 | insn_len = insn_decode_len (contents, content_length, offset + loop_len); |
64b607e6 BW |
3432 | if (loop_len == 0 || insn_len == 0) |
3433 | { | |
3434 | BFD_ASSERT (FALSE); | |
3435 | return FALSE; | |
3436 | } | |
e0001a05 | 3437 | |
43cd72b9 BW |
3438 | return check_branch_target_aligned_address (address + loop_len, insn_len); |
3439 | } | |
e0001a05 | 3440 | |
e0001a05 NC |
3441 | |
3442 | static bfd_boolean | |
7fa3d080 | 3443 | check_branch_target_aligned_address (bfd_vma addr, int len) |
e0001a05 | 3444 | { |
43cd72b9 BW |
3445 | if (len == 8) |
3446 | return (addr % 8 == 0); | |
3447 | return ((addr >> 2) == ((addr + len - 1) >> 2)); | |
e0001a05 NC |
3448 | } |
3449 | ||
43cd72b9 BW |
3450 | \f |
3451 | /* Instruction widening and narrowing. */ | |
e0001a05 | 3452 | |
7fa3d080 BW |
3453 | /* When FLIX is available we need to access certain instructions only |
3454 | when they are 16-bit or 24-bit instructions. This table caches | |
3455 | information about such instructions by walking through all the | |
3456 | opcodes and finding the smallest single-slot format into which each | |
3457 | can be encoded. */ | |
3458 | ||
3459 | static xtensa_format *op_single_fmt_table = NULL; | |
e0001a05 NC |
3460 | |
3461 | ||
7fa3d080 BW |
3462 | static void |
3463 | init_op_single_format_table (void) | |
e0001a05 | 3464 | { |
7fa3d080 BW |
3465 | xtensa_isa isa = xtensa_default_isa; |
3466 | xtensa_insnbuf ibuf; | |
3467 | xtensa_opcode opcode; | |
3468 | xtensa_format fmt; | |
3469 | int num_opcodes; | |
3470 | ||
3471 | if (op_single_fmt_table) | |
3472 | return; | |
3473 | ||
3474 | ibuf = xtensa_insnbuf_alloc (isa); | |
3475 | num_opcodes = xtensa_isa_num_opcodes (isa); | |
3476 | ||
3477 | op_single_fmt_table = (xtensa_format *) | |
3478 | bfd_malloc (sizeof (xtensa_format) * num_opcodes); | |
3479 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
3480 | { | |
3481 | op_single_fmt_table[opcode] = XTENSA_UNDEFINED; | |
3482 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
3483 | { | |
3484 | if (xtensa_format_num_slots (isa, fmt) == 1 | |
3485 | && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0) | |
3486 | { | |
3487 | xtensa_opcode old_fmt = op_single_fmt_table[opcode]; | |
3488 | int fmt_length = xtensa_format_length (isa, fmt); | |
3489 | if (old_fmt == XTENSA_UNDEFINED | |
3490 | || fmt_length < xtensa_format_length (isa, old_fmt)) | |
3491 | op_single_fmt_table[opcode] = fmt; | |
3492 | } | |
3493 | } | |
3494 | } | |
3495 | xtensa_insnbuf_free (isa, ibuf); | |
3496 | } | |
3497 | ||
3498 | ||
3499 | static xtensa_format | |
3500 | get_single_format (xtensa_opcode opcode) | |
3501 | { | |
3502 | init_op_single_format_table (); | |
3503 | return op_single_fmt_table[opcode]; | |
3504 | } | |
e0001a05 | 3505 | |
e0001a05 | 3506 | |
43cd72b9 BW |
3507 | /* For the set of narrowable instructions we do NOT include the |
3508 | narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities | |
3509 | involved during linker relaxation that may require these to | |
3510 | re-expand in some conditions. Also, the narrowing "or" -> mov.n | |
3511 | requires special case code to ensure it only works when op1 == op2. */ | |
e0001a05 | 3512 | |
7fa3d080 BW |
3513 | struct string_pair |
3514 | { | |
3515 | const char *wide; | |
3516 | const char *narrow; | |
3517 | }; | |
3518 | ||
43cd72b9 | 3519 | struct string_pair narrowable[] = |
e0001a05 | 3520 | { |
43cd72b9 BW |
3521 | { "add", "add.n" }, |
3522 | { "addi", "addi.n" }, | |
3523 | { "addmi", "addi.n" }, | |
3524 | { "l32i", "l32i.n" }, | |
3525 | { "movi", "movi.n" }, | |
3526 | { "ret", "ret.n" }, | |
3527 | { "retw", "retw.n" }, | |
3528 | { "s32i", "s32i.n" }, | |
3529 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
3530 | }; | |
e0001a05 | 3531 | |
43cd72b9 | 3532 | struct string_pair widenable[] = |
e0001a05 | 3533 | { |
43cd72b9 BW |
3534 | { "add", "add.n" }, |
3535 | { "addi", "addi.n" }, | |
3536 | { "addmi", "addi.n" }, | |
3537 | { "beqz", "beqz.n" }, | |
3538 | { "bnez", "bnez.n" }, | |
3539 | { "l32i", "l32i.n" }, | |
3540 | { "movi", "movi.n" }, | |
3541 | { "ret", "ret.n" }, | |
3542 | { "retw", "retw.n" }, | |
3543 | { "s32i", "s32i.n" }, | |
3544 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
3545 | }; | |
e0001a05 NC |
3546 | |
3547 | ||
64b607e6 BW |
3548 | /* Check if an instruction can be "narrowed", i.e., changed from a standard |
3549 | 3-byte instruction to a 2-byte "density" instruction. If it is valid, | |
3550 | return the instruction buffer holding the narrow instruction. Otherwise, | |
3551 | return 0. The set of valid narrowing are specified by a string table | |
43cd72b9 BW |
3552 | but require some special case operand checks in some cases. */ |
3553 | ||
64b607e6 BW |
3554 | static xtensa_insnbuf |
3555 | can_narrow_instruction (xtensa_insnbuf slotbuf, | |
3556 | xtensa_format fmt, | |
3557 | xtensa_opcode opcode) | |
e0001a05 | 3558 | { |
43cd72b9 | 3559 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
3560 | xtensa_format o_fmt; |
3561 | unsigned opi; | |
e0001a05 | 3562 | |
43cd72b9 BW |
3563 | static xtensa_insnbuf o_insnbuf = NULL; |
3564 | static xtensa_insnbuf o_slotbuf = NULL; | |
e0001a05 | 3565 | |
64b607e6 | 3566 | if (o_insnbuf == NULL) |
43cd72b9 | 3567 | { |
43cd72b9 BW |
3568 | o_insnbuf = xtensa_insnbuf_alloc (isa); |
3569 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
3570 | } | |
e0001a05 | 3571 | |
64b607e6 | 3572 | for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++) |
43cd72b9 BW |
3573 | { |
3574 | bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0); | |
e0001a05 | 3575 | |
43cd72b9 BW |
3576 | if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide)) |
3577 | { | |
3578 | uint32 value, newval; | |
3579 | int i, operand_count, o_operand_count; | |
3580 | xtensa_opcode o_opcode; | |
e0001a05 | 3581 | |
43cd72b9 BW |
3582 | /* Address does not matter in this case. We might need to |
3583 | fix it to handle branches/jumps. */ | |
3584 | bfd_vma self_address = 0; | |
e0001a05 | 3585 | |
43cd72b9 BW |
3586 | o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow); |
3587 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 3588 | return 0; |
43cd72b9 BW |
3589 | o_fmt = get_single_format (o_opcode); |
3590 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 3591 | return 0; |
e0001a05 | 3592 | |
43cd72b9 BW |
3593 | if (xtensa_format_length (isa, fmt) != 3 |
3594 | || xtensa_format_length (isa, o_fmt) != 2) | |
64b607e6 | 3595 | return 0; |
e0001a05 | 3596 | |
43cd72b9 BW |
3597 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
3598 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
3599 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
e0001a05 | 3600 | |
43cd72b9 | 3601 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 3602 | return 0; |
e0001a05 | 3603 | |
43cd72b9 BW |
3604 | if (!is_or) |
3605 | { | |
3606 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 3607 | return 0; |
43cd72b9 BW |
3608 | } |
3609 | else | |
3610 | { | |
3611 | uint32 rawval0, rawval1, rawval2; | |
e0001a05 | 3612 | |
64b607e6 BW |
3613 | if (o_operand_count + 1 != operand_count |
3614 | || xtensa_operand_get_field (isa, opcode, 0, | |
3615 | fmt, 0, slotbuf, &rawval0) != 0 | |
3616 | || xtensa_operand_get_field (isa, opcode, 1, | |
3617 | fmt, 0, slotbuf, &rawval1) != 0 | |
3618 | || xtensa_operand_get_field (isa, opcode, 2, | |
3619 | fmt, 0, slotbuf, &rawval2) != 0 | |
3620 | || rawval1 != rawval2 | |
3621 | || rawval0 == rawval1 /* it is a nop */) | |
3622 | return 0; | |
43cd72b9 | 3623 | } |
e0001a05 | 3624 | |
43cd72b9 BW |
3625 | for (i = 0; i < o_operand_count; ++i) |
3626 | { | |
3627 | if (xtensa_operand_get_field (isa, opcode, i, fmt, 0, | |
3628 | slotbuf, &value) | |
3629 | || xtensa_operand_decode (isa, opcode, i, &value)) | |
64b607e6 | 3630 | return 0; |
e0001a05 | 3631 | |
43cd72b9 BW |
3632 | /* PC-relative branches need adjustment, but |
3633 | the PC-rel operand will always have a relocation. */ | |
3634 | newval = value; | |
3635 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
3636 | self_address) | |
3637 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
3638 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
3639 | o_slotbuf, newval)) | |
64b607e6 | 3640 | return 0; |
43cd72b9 | 3641 | } |
e0001a05 | 3642 | |
64b607e6 BW |
3643 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) |
3644 | return 0; | |
e0001a05 | 3645 | |
64b607e6 | 3646 | return o_insnbuf; |
43cd72b9 BW |
3647 | } |
3648 | } | |
64b607e6 | 3649 | return 0; |
43cd72b9 | 3650 | } |
e0001a05 | 3651 | |
e0001a05 | 3652 | |
64b607e6 BW |
3653 | /* Attempt to narrow an instruction. If the narrowing is valid, perform |
3654 | the action in-place directly into the contents and return TRUE. Otherwise, | |
3655 | the return value is FALSE and the contents are not modified. */ | |
e0001a05 | 3656 | |
43cd72b9 | 3657 | static bfd_boolean |
64b607e6 BW |
3658 | narrow_instruction (bfd_byte *contents, |
3659 | bfd_size_type content_length, | |
3660 | bfd_size_type offset) | |
e0001a05 | 3661 | { |
43cd72b9 | 3662 | xtensa_opcode opcode; |
64b607e6 | 3663 | bfd_size_type insn_len; |
43cd72b9 | 3664 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
3665 | xtensa_format fmt; |
3666 | xtensa_insnbuf o_insnbuf; | |
e0001a05 | 3667 | |
43cd72b9 BW |
3668 | static xtensa_insnbuf insnbuf = NULL; |
3669 | static xtensa_insnbuf slotbuf = NULL; | |
e0001a05 | 3670 | |
43cd72b9 BW |
3671 | if (insnbuf == NULL) |
3672 | { | |
3673 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3674 | slotbuf = xtensa_insnbuf_alloc (isa); | |
43cd72b9 | 3675 | } |
e0001a05 | 3676 | |
43cd72b9 | 3677 | BFD_ASSERT (offset < content_length); |
2c8c90bc | 3678 | |
43cd72b9 | 3679 | if (content_length < 2) |
e0001a05 NC |
3680 | return FALSE; |
3681 | ||
64b607e6 | 3682 | /* We will hand-code a few of these for a little while. |
43cd72b9 BW |
3683 | These have all been specified in the assembler aleady. */ |
3684 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3685 | content_length - offset); | |
3686 | fmt = xtensa_format_decode (isa, insnbuf); | |
3687 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
e0001a05 NC |
3688 | return FALSE; |
3689 | ||
43cd72b9 | 3690 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) |
e0001a05 NC |
3691 | return FALSE; |
3692 | ||
43cd72b9 BW |
3693 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); |
3694 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 3695 | return FALSE; |
43cd72b9 BW |
3696 | insn_len = xtensa_format_length (isa, fmt); |
3697 | if (insn_len > content_length) | |
3698 | return FALSE; | |
3699 | ||
64b607e6 BW |
3700 | o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode); |
3701 | if (o_insnbuf) | |
3702 | { | |
3703 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
3704 | content_length - offset); | |
3705 | return TRUE; | |
3706 | } | |
3707 | ||
3708 | return FALSE; | |
3709 | } | |
3710 | ||
3711 | ||
3712 | /* Check if an instruction can be "widened", i.e., changed from a 2-byte | |
3713 | "density" instruction to a standard 3-byte instruction. If it is valid, | |
3714 | return the instruction buffer holding the wide instruction. Otherwise, | |
3715 | return 0. The set of valid widenings are specified by a string table | |
3716 | but require some special case operand checks in some cases. */ | |
3717 | ||
3718 | static xtensa_insnbuf | |
3719 | can_widen_instruction (xtensa_insnbuf slotbuf, | |
3720 | xtensa_format fmt, | |
3721 | xtensa_opcode opcode) | |
3722 | { | |
3723 | xtensa_isa isa = xtensa_default_isa; | |
3724 | xtensa_format o_fmt; | |
3725 | unsigned opi; | |
3726 | ||
3727 | static xtensa_insnbuf o_insnbuf = NULL; | |
3728 | static xtensa_insnbuf o_slotbuf = NULL; | |
3729 | ||
3730 | if (o_insnbuf == NULL) | |
3731 | { | |
3732 | o_insnbuf = xtensa_insnbuf_alloc (isa); | |
3733 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
3734 | } | |
3735 | ||
3736 | for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++) | |
e0001a05 | 3737 | { |
43cd72b9 BW |
3738 | bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0); |
3739 | bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0 | |
3740 | || strcmp ("bnez", widenable[opi].wide) == 0); | |
e0001a05 | 3741 | |
43cd72b9 BW |
3742 | if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow)) |
3743 | { | |
3744 | uint32 value, newval; | |
3745 | int i, operand_count, o_operand_count, check_operand_count; | |
3746 | xtensa_opcode o_opcode; | |
e0001a05 | 3747 | |
43cd72b9 BW |
3748 | /* Address does not matter in this case. We might need to fix it |
3749 | to handle branches/jumps. */ | |
3750 | bfd_vma self_address = 0; | |
e0001a05 | 3751 | |
43cd72b9 BW |
3752 | o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide); |
3753 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 3754 | return 0; |
43cd72b9 BW |
3755 | o_fmt = get_single_format (o_opcode); |
3756 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 3757 | return 0; |
e0001a05 | 3758 | |
43cd72b9 BW |
3759 | if (xtensa_format_length (isa, fmt) != 2 |
3760 | || xtensa_format_length (isa, o_fmt) != 3) | |
64b607e6 | 3761 | return 0; |
e0001a05 | 3762 | |
43cd72b9 BW |
3763 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
3764 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
3765 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
3766 | check_operand_count = o_operand_count; | |
e0001a05 | 3767 | |
43cd72b9 | 3768 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 3769 | return 0; |
e0001a05 | 3770 | |
43cd72b9 BW |
3771 | if (!is_or) |
3772 | { | |
3773 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 3774 | return 0; |
43cd72b9 BW |
3775 | } |
3776 | else | |
3777 | { | |
3778 | uint32 rawval0, rawval1; | |
3779 | ||
64b607e6 BW |
3780 | if (o_operand_count != operand_count + 1 |
3781 | || xtensa_operand_get_field (isa, opcode, 0, | |
3782 | fmt, 0, slotbuf, &rawval0) != 0 | |
3783 | || xtensa_operand_get_field (isa, opcode, 1, | |
3784 | fmt, 0, slotbuf, &rawval1) != 0 | |
3785 | || rawval0 == rawval1 /* it is a nop */) | |
3786 | return 0; | |
43cd72b9 BW |
3787 | } |
3788 | if (is_branch) | |
3789 | check_operand_count--; | |
3790 | ||
64b607e6 | 3791 | for (i = 0; i < check_operand_count; i++) |
43cd72b9 BW |
3792 | { |
3793 | int new_i = i; | |
3794 | if (is_or && i == o_operand_count - 1) | |
3795 | new_i = i - 1; | |
3796 | if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0, | |
3797 | slotbuf, &value) | |
3798 | || xtensa_operand_decode (isa, opcode, new_i, &value)) | |
64b607e6 | 3799 | return 0; |
43cd72b9 BW |
3800 | |
3801 | /* PC-relative branches need adjustment, but | |
3802 | the PC-rel operand will always have a relocation. */ | |
3803 | newval = value; | |
3804 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
3805 | self_address) | |
3806 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
3807 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
3808 | o_slotbuf, newval)) | |
64b607e6 | 3809 | return 0; |
43cd72b9 BW |
3810 | } |
3811 | ||
3812 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) | |
64b607e6 | 3813 | return 0; |
43cd72b9 | 3814 | |
64b607e6 | 3815 | return o_insnbuf; |
43cd72b9 BW |
3816 | } |
3817 | } | |
64b607e6 BW |
3818 | return 0; |
3819 | } | |
3820 | ||
3821 | ||
3822 | /* Attempt to widen an instruction. If the widening is valid, perform | |
3823 | the action in-place directly into the contents and return TRUE. Otherwise, | |
3824 | the return value is FALSE and the contents are not modified. */ | |
3825 | ||
3826 | static bfd_boolean | |
3827 | widen_instruction (bfd_byte *contents, | |
3828 | bfd_size_type content_length, | |
3829 | bfd_size_type offset) | |
3830 | { | |
3831 | xtensa_opcode opcode; | |
3832 | bfd_size_type insn_len; | |
3833 | xtensa_isa isa = xtensa_default_isa; | |
3834 | xtensa_format fmt; | |
3835 | xtensa_insnbuf o_insnbuf; | |
3836 | ||
3837 | static xtensa_insnbuf insnbuf = NULL; | |
3838 | static xtensa_insnbuf slotbuf = NULL; | |
3839 | ||
3840 | if (insnbuf == NULL) | |
3841 | { | |
3842 | insnbuf = xtensa_insnbuf_alloc (isa); | |
3843 | slotbuf = xtensa_insnbuf_alloc (isa); | |
3844 | } | |
3845 | ||
3846 | BFD_ASSERT (offset < content_length); | |
3847 | ||
3848 | if (content_length < 2) | |
3849 | return FALSE; | |
3850 | ||
3851 | /* We will hand-code a few of these for a little while. | |
3852 | These have all been specified in the assembler aleady. */ | |
3853 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
3854 | content_length - offset); | |
3855 | fmt = xtensa_format_decode (isa, insnbuf); | |
3856 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
3857 | return FALSE; | |
3858 | ||
3859 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) | |
3860 | return FALSE; | |
3861 | ||
3862 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
3863 | if (opcode == XTENSA_UNDEFINED) | |
3864 | return FALSE; | |
3865 | insn_len = xtensa_format_length (isa, fmt); | |
3866 | if (insn_len > content_length) | |
3867 | return FALSE; | |
3868 | ||
3869 | o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode); | |
3870 | if (o_insnbuf) | |
3871 | { | |
3872 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
3873 | content_length - offset); | |
3874 | return TRUE; | |
3875 | } | |
43cd72b9 | 3876 | return FALSE; |
e0001a05 NC |
3877 | } |
3878 | ||
43cd72b9 BW |
3879 | \f |
3880 | /* Code for transforming CALLs at link-time. */ | |
e0001a05 | 3881 | |
43cd72b9 | 3882 | static bfd_reloc_status_type |
7fa3d080 BW |
3883 | elf_xtensa_do_asm_simplify (bfd_byte *contents, |
3884 | bfd_vma address, | |
3885 | bfd_vma content_length, | |
3886 | char **error_message) | |
e0001a05 | 3887 | { |
43cd72b9 BW |
3888 | static xtensa_insnbuf insnbuf = NULL; |
3889 | static xtensa_insnbuf slotbuf = NULL; | |
3890 | xtensa_format core_format = XTENSA_UNDEFINED; | |
3891 | xtensa_opcode opcode; | |
3892 | xtensa_opcode direct_call_opcode; | |
3893 | xtensa_isa isa = xtensa_default_isa; | |
3894 | bfd_byte *chbuf = contents + address; | |
3895 | int opn; | |
e0001a05 | 3896 | |
43cd72b9 | 3897 | if (insnbuf == NULL) |
e0001a05 | 3898 | { |
43cd72b9 BW |
3899 | insnbuf = xtensa_insnbuf_alloc (isa); |
3900 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 3901 | } |
e0001a05 | 3902 | |
43cd72b9 BW |
3903 | if (content_length < address) |
3904 | { | |
3905 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
3906 | return bfd_reloc_other; | |
3907 | } | |
e0001a05 | 3908 | |
43cd72b9 BW |
3909 | opcode = get_expanded_call_opcode (chbuf, content_length - address, 0); |
3910 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
3911 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
3912 | { | |
3913 | *error_message = _("Attempt to convert L32R/CALLX to CALL failed"); | |
3914 | return bfd_reloc_other; | |
3915 | } | |
3916 | ||
3917 | /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */ | |
3918 | core_format = xtensa_format_lookup (isa, "x24"); | |
3919 | opcode = xtensa_opcode_lookup (isa, "or"); | |
3920 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode); | |
3921 | for (opn = 0; opn < 3; opn++) | |
3922 | { | |
3923 | uint32 regno = 1; | |
3924 | xtensa_operand_encode (isa, opcode, opn, ®no); | |
3925 | xtensa_operand_set_field (isa, opcode, opn, core_format, 0, | |
3926 | slotbuf, regno); | |
3927 | } | |
3928 | xtensa_format_encode (isa, core_format, insnbuf); | |
3929 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
3930 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address); | |
e0001a05 | 3931 | |
43cd72b9 BW |
3932 | /* Assemble a CALL ("callN 0") into the 3 byte offset. */ |
3933 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode); | |
3934 | xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0); | |
e0001a05 | 3935 | |
43cd72b9 BW |
3936 | xtensa_format_encode (isa, core_format, insnbuf); |
3937 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
3938 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3, | |
3939 | content_length - address - 3); | |
e0001a05 | 3940 | |
43cd72b9 BW |
3941 | return bfd_reloc_ok; |
3942 | } | |
e0001a05 | 3943 | |
e0001a05 | 3944 | |
43cd72b9 | 3945 | static bfd_reloc_status_type |
7fa3d080 BW |
3946 | contract_asm_expansion (bfd_byte *contents, |
3947 | bfd_vma content_length, | |
3948 | Elf_Internal_Rela *irel, | |
3949 | char **error_message) | |
43cd72b9 BW |
3950 | { |
3951 | bfd_reloc_status_type retval = | |
3952 | elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length, | |
3953 | error_message); | |
e0001a05 | 3954 | |
43cd72b9 BW |
3955 | if (retval != bfd_reloc_ok) |
3956 | return bfd_reloc_dangerous; | |
e0001a05 | 3957 | |
43cd72b9 BW |
3958 | /* Update the irel->r_offset field so that the right immediate and |
3959 | the right instruction are modified during the relocation. */ | |
3960 | irel->r_offset += 3; | |
3961 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP); | |
3962 | return bfd_reloc_ok; | |
3963 | } | |
e0001a05 | 3964 | |
e0001a05 | 3965 | |
43cd72b9 | 3966 | static xtensa_opcode |
7fa3d080 | 3967 | swap_callx_for_call_opcode (xtensa_opcode opcode) |
e0001a05 | 3968 | { |
43cd72b9 | 3969 | init_call_opcodes (); |
e0001a05 | 3970 | |
43cd72b9 BW |
3971 | if (opcode == callx0_op) return call0_op; |
3972 | if (opcode == callx4_op) return call4_op; | |
3973 | if (opcode == callx8_op) return call8_op; | |
3974 | if (opcode == callx12_op) return call12_op; | |
e0001a05 | 3975 | |
43cd72b9 BW |
3976 | /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */ |
3977 | return XTENSA_UNDEFINED; | |
3978 | } | |
e0001a05 | 3979 | |
e0001a05 | 3980 | |
43cd72b9 BW |
3981 | /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN; |
3982 | CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode. | |
3983 | If not, return XTENSA_UNDEFINED. */ | |
e0001a05 | 3984 | |
43cd72b9 BW |
3985 | #define L32R_TARGET_REG_OPERAND 0 |
3986 | #define CONST16_TARGET_REG_OPERAND 0 | |
3987 | #define CALLN_SOURCE_OPERAND 0 | |
e0001a05 | 3988 | |
43cd72b9 | 3989 | static xtensa_opcode |
7fa3d080 | 3990 | get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r) |
e0001a05 | 3991 | { |
43cd72b9 BW |
3992 | static xtensa_insnbuf insnbuf = NULL; |
3993 | static xtensa_insnbuf slotbuf = NULL; | |
3994 | xtensa_format fmt; | |
3995 | xtensa_opcode opcode; | |
3996 | xtensa_isa isa = xtensa_default_isa; | |
3997 | uint32 regno, const16_regno, call_regno; | |
3998 | int offset = 0; | |
e0001a05 | 3999 | |
43cd72b9 | 4000 | if (insnbuf == NULL) |
e0001a05 | 4001 | { |
43cd72b9 BW |
4002 | insnbuf = xtensa_insnbuf_alloc (isa); |
4003 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4004 | } |
43cd72b9 BW |
4005 | |
4006 | xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize); | |
4007 | fmt = xtensa_format_decode (isa, insnbuf); | |
4008 | if (fmt == XTENSA_UNDEFINED | |
4009 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4010 | return XTENSA_UNDEFINED; | |
4011 | ||
4012 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4013 | if (opcode == XTENSA_UNDEFINED) | |
4014 | return XTENSA_UNDEFINED; | |
4015 | ||
4016 | if (opcode == get_l32r_opcode ()) | |
e0001a05 | 4017 | { |
43cd72b9 BW |
4018 | if (p_uses_l32r) |
4019 | *p_uses_l32r = TRUE; | |
4020 | if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4021 | fmt, 0, slotbuf, ®no) | |
4022 | || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4023 | ®no)) | |
4024 | return XTENSA_UNDEFINED; | |
e0001a05 | 4025 | } |
43cd72b9 | 4026 | else if (opcode == get_const16_opcode ()) |
e0001a05 | 4027 | { |
43cd72b9 BW |
4028 | if (p_uses_l32r) |
4029 | *p_uses_l32r = FALSE; | |
4030 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4031 | fmt, 0, slotbuf, ®no) | |
4032 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4033 | ®no)) | |
4034 | return XTENSA_UNDEFINED; | |
4035 | ||
4036 | /* Check that the next instruction is also CONST16. */ | |
4037 | offset += xtensa_format_length (isa, fmt); | |
4038 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4039 | fmt = xtensa_format_decode (isa, insnbuf); | |
4040 | if (fmt == XTENSA_UNDEFINED | |
4041 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4042 | return XTENSA_UNDEFINED; | |
4043 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4044 | if (opcode != get_const16_opcode ()) | |
4045 | return XTENSA_UNDEFINED; | |
4046 | ||
4047 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4048 | fmt, 0, slotbuf, &const16_regno) | |
4049 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4050 | &const16_regno) | |
4051 | || const16_regno != regno) | |
4052 | return XTENSA_UNDEFINED; | |
e0001a05 | 4053 | } |
43cd72b9 BW |
4054 | else |
4055 | return XTENSA_UNDEFINED; | |
e0001a05 | 4056 | |
43cd72b9 BW |
4057 | /* Next instruction should be an CALLXn with operand 0 == regno. */ |
4058 | offset += xtensa_format_length (isa, fmt); | |
4059 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4060 | fmt = xtensa_format_decode (isa, insnbuf); | |
4061 | if (fmt == XTENSA_UNDEFINED | |
4062 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4063 | return XTENSA_UNDEFINED; | |
4064 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4065 | if (opcode == XTENSA_UNDEFINED | |
4066 | || !is_indirect_call_opcode (opcode)) | |
4067 | return XTENSA_UNDEFINED; | |
e0001a05 | 4068 | |
43cd72b9 BW |
4069 | if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND, |
4070 | fmt, 0, slotbuf, &call_regno) | |
4071 | || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND, | |
4072 | &call_regno)) | |
4073 | return XTENSA_UNDEFINED; | |
e0001a05 | 4074 | |
43cd72b9 BW |
4075 | if (call_regno != regno) |
4076 | return XTENSA_UNDEFINED; | |
e0001a05 | 4077 | |
43cd72b9 BW |
4078 | return opcode; |
4079 | } | |
e0001a05 | 4080 | |
43cd72b9 BW |
4081 | \f |
4082 | /* Data structures used during relaxation. */ | |
e0001a05 | 4083 | |
43cd72b9 | 4084 | /* r_reloc: relocation values. */ |
e0001a05 | 4085 | |
43cd72b9 BW |
4086 | /* Through the relaxation process, we need to keep track of the values |
4087 | that will result from evaluating relocations. The standard ELF | |
4088 | relocation structure is not sufficient for this purpose because we're | |
4089 | operating on multiple input files at once, so we need to know which | |
4090 | input file a relocation refers to. The r_reloc structure thus | |
4091 | records both the input file (bfd) and ELF relocation. | |
e0001a05 | 4092 | |
43cd72b9 BW |
4093 | For efficiency, an r_reloc also contains a "target_offset" field to |
4094 | cache the target-section-relative offset value that is represented by | |
4095 | the relocation. | |
4096 | ||
4097 | The r_reloc also contains a virtual offset that allows multiple | |
4098 | inserted literals to be placed at the same "address" with | |
4099 | different offsets. */ | |
e0001a05 | 4100 | |
43cd72b9 | 4101 | typedef struct r_reloc_struct r_reloc; |
e0001a05 | 4102 | |
43cd72b9 | 4103 | struct r_reloc_struct |
e0001a05 | 4104 | { |
43cd72b9 BW |
4105 | bfd *abfd; |
4106 | Elf_Internal_Rela rela; | |
e0001a05 | 4107 | bfd_vma target_offset; |
43cd72b9 | 4108 | bfd_vma virtual_offset; |
e0001a05 NC |
4109 | }; |
4110 | ||
e0001a05 | 4111 | |
43cd72b9 BW |
4112 | /* The r_reloc structure is included by value in literal_value, but not |
4113 | every literal_value has an associated relocation -- some are simple | |
4114 | constants. In such cases, we set all the fields in the r_reloc | |
4115 | struct to zero. The r_reloc_is_const function should be used to | |
4116 | detect this case. */ | |
e0001a05 | 4117 | |
43cd72b9 | 4118 | static bfd_boolean |
7fa3d080 | 4119 | r_reloc_is_const (const r_reloc *r_rel) |
e0001a05 | 4120 | { |
43cd72b9 | 4121 | return (r_rel->abfd == NULL); |
e0001a05 NC |
4122 | } |
4123 | ||
4124 | ||
43cd72b9 | 4125 | static bfd_vma |
7fa3d080 | 4126 | r_reloc_get_target_offset (const r_reloc *r_rel) |
e0001a05 | 4127 | { |
43cd72b9 BW |
4128 | bfd_vma target_offset; |
4129 | unsigned long r_symndx; | |
e0001a05 | 4130 | |
43cd72b9 BW |
4131 | BFD_ASSERT (!r_reloc_is_const (r_rel)); |
4132 | r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4133 | target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx); | |
4134 | return (target_offset + r_rel->rela.r_addend); | |
4135 | } | |
e0001a05 | 4136 | |
e0001a05 | 4137 | |
43cd72b9 | 4138 | static struct elf_link_hash_entry * |
7fa3d080 | 4139 | r_reloc_get_hash_entry (const r_reloc *r_rel) |
e0001a05 | 4140 | { |
43cd72b9 BW |
4141 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); |
4142 | return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx); | |
4143 | } | |
e0001a05 | 4144 | |
43cd72b9 BW |
4145 | |
4146 | static asection * | |
7fa3d080 | 4147 | r_reloc_get_section (const r_reloc *r_rel) |
43cd72b9 BW |
4148 | { |
4149 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4150 | return get_elf_r_symndx_section (r_rel->abfd, r_symndx); | |
4151 | } | |
e0001a05 NC |
4152 | |
4153 | ||
4154 | static bfd_boolean | |
7fa3d080 | 4155 | r_reloc_is_defined (const r_reloc *r_rel) |
e0001a05 | 4156 | { |
43cd72b9 BW |
4157 | asection *sec; |
4158 | if (r_rel == NULL) | |
e0001a05 | 4159 | return FALSE; |
e0001a05 | 4160 | |
43cd72b9 BW |
4161 | sec = r_reloc_get_section (r_rel); |
4162 | if (sec == bfd_abs_section_ptr | |
4163 | || sec == bfd_com_section_ptr | |
4164 | || sec == bfd_und_section_ptr) | |
4165 | return FALSE; | |
4166 | return TRUE; | |
e0001a05 NC |
4167 | } |
4168 | ||
4169 | ||
7fa3d080 BW |
4170 | static void |
4171 | r_reloc_init (r_reloc *r_rel, | |
4172 | bfd *abfd, | |
4173 | Elf_Internal_Rela *irel, | |
4174 | bfd_byte *contents, | |
4175 | bfd_size_type content_length) | |
4176 | { | |
4177 | int r_type; | |
4178 | reloc_howto_type *howto; | |
4179 | ||
4180 | if (irel) | |
4181 | { | |
4182 | r_rel->rela = *irel; | |
4183 | r_rel->abfd = abfd; | |
4184 | r_rel->target_offset = r_reloc_get_target_offset (r_rel); | |
4185 | r_rel->virtual_offset = 0; | |
4186 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
4187 | howto = &elf_howto_table[r_type]; | |
4188 | if (howto->partial_inplace) | |
4189 | { | |
4190 | bfd_vma inplace_val; | |
4191 | BFD_ASSERT (r_rel->rela.r_offset < content_length); | |
4192 | ||
4193 | inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]); | |
4194 | r_rel->target_offset += inplace_val; | |
4195 | } | |
4196 | } | |
4197 | else | |
4198 | memset (r_rel, 0, sizeof (r_reloc)); | |
4199 | } | |
4200 | ||
4201 | ||
43cd72b9 BW |
4202 | #if DEBUG |
4203 | ||
e0001a05 | 4204 | static void |
7fa3d080 | 4205 | print_r_reloc (FILE *fp, const r_reloc *r_rel) |
e0001a05 | 4206 | { |
43cd72b9 BW |
4207 | if (r_reloc_is_defined (r_rel)) |
4208 | { | |
4209 | asection *sec = r_reloc_get_section (r_rel); | |
4210 | fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name); | |
4211 | } | |
4212 | else if (r_reloc_get_hash_entry (r_rel)) | |
4213 | fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string); | |
4214 | else | |
4215 | fprintf (fp, " ?? + "); | |
e0001a05 | 4216 | |
43cd72b9 BW |
4217 | fprintf_vma (fp, r_rel->target_offset); |
4218 | if (r_rel->virtual_offset) | |
4219 | { | |
4220 | fprintf (fp, " + "); | |
4221 | fprintf_vma (fp, r_rel->virtual_offset); | |
4222 | } | |
4223 | ||
4224 | fprintf (fp, ")"); | |
4225 | } | |
e0001a05 | 4226 | |
43cd72b9 | 4227 | #endif /* DEBUG */ |
e0001a05 | 4228 | |
43cd72b9 BW |
4229 | \f |
4230 | /* source_reloc: relocations that reference literals. */ | |
e0001a05 | 4231 | |
43cd72b9 BW |
4232 | /* To determine whether literals can be coalesced, we need to first |
4233 | record all the relocations that reference the literals. The | |
4234 | source_reloc structure below is used for this purpose. The | |
4235 | source_reloc entries are kept in a per-literal-section array, sorted | |
4236 | by offset within the literal section (i.e., target offset). | |
e0001a05 | 4237 | |
43cd72b9 BW |
4238 | The source_sec and r_rel.rela.r_offset fields identify the source of |
4239 | the relocation. The r_rel field records the relocation value, i.e., | |
4240 | the offset of the literal being referenced. The opnd field is needed | |
4241 | to determine the range of the immediate field to which the relocation | |
4242 | applies, so we can determine whether another literal with the same | |
4243 | value is within range. The is_null field is true when the relocation | |
4244 | is being removed (e.g., when an L32R is being removed due to a CALLX | |
4245 | that is converted to a direct CALL). */ | |
e0001a05 | 4246 | |
43cd72b9 BW |
4247 | typedef struct source_reloc_struct source_reloc; |
4248 | ||
4249 | struct source_reloc_struct | |
e0001a05 | 4250 | { |
43cd72b9 BW |
4251 | asection *source_sec; |
4252 | r_reloc r_rel; | |
4253 | xtensa_opcode opcode; | |
4254 | int opnd; | |
4255 | bfd_boolean is_null; | |
4256 | bfd_boolean is_abs_literal; | |
4257 | }; | |
e0001a05 | 4258 | |
e0001a05 | 4259 | |
e0001a05 | 4260 | static void |
7fa3d080 BW |
4261 | init_source_reloc (source_reloc *reloc, |
4262 | asection *source_sec, | |
4263 | const r_reloc *r_rel, | |
4264 | xtensa_opcode opcode, | |
4265 | int opnd, | |
4266 | bfd_boolean is_abs_literal) | |
e0001a05 | 4267 | { |
43cd72b9 BW |
4268 | reloc->source_sec = source_sec; |
4269 | reloc->r_rel = *r_rel; | |
4270 | reloc->opcode = opcode; | |
4271 | reloc->opnd = opnd; | |
4272 | reloc->is_null = FALSE; | |
4273 | reloc->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
4274 | } |
4275 | ||
e0001a05 | 4276 | |
43cd72b9 BW |
4277 | /* Find the source_reloc for a particular source offset and relocation |
4278 | type. Note that the array is sorted by _target_ offset, so this is | |
4279 | just a linear search. */ | |
e0001a05 | 4280 | |
43cd72b9 | 4281 | static source_reloc * |
7fa3d080 BW |
4282 | find_source_reloc (source_reloc *src_relocs, |
4283 | int src_count, | |
4284 | asection *sec, | |
4285 | Elf_Internal_Rela *irel) | |
e0001a05 | 4286 | { |
43cd72b9 | 4287 | int i; |
e0001a05 | 4288 | |
43cd72b9 BW |
4289 | for (i = 0; i < src_count; i++) |
4290 | { | |
4291 | if (src_relocs[i].source_sec == sec | |
4292 | && src_relocs[i].r_rel.rela.r_offset == irel->r_offset | |
4293 | && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info) | |
4294 | == ELF32_R_TYPE (irel->r_info))) | |
4295 | return &src_relocs[i]; | |
4296 | } | |
e0001a05 | 4297 | |
43cd72b9 | 4298 | return NULL; |
e0001a05 NC |
4299 | } |
4300 | ||
4301 | ||
43cd72b9 | 4302 | static int |
7fa3d080 | 4303 | source_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 4304 | { |
43cd72b9 BW |
4305 | const source_reloc *a = (const source_reloc *) ap; |
4306 | const source_reloc *b = (const source_reloc *) bp; | |
e0001a05 | 4307 | |
43cd72b9 BW |
4308 | if (a->r_rel.target_offset != b->r_rel.target_offset) |
4309 | return (a->r_rel.target_offset - b->r_rel.target_offset); | |
e0001a05 | 4310 | |
43cd72b9 BW |
4311 | /* We don't need to sort on these criteria for correctness, |
4312 | but enforcing a more strict ordering prevents unstable qsort | |
4313 | from behaving differently with different implementations. | |
4314 | Without the code below we get correct but different results | |
4315 | on Solaris 2.7 and 2.8. We would like to always produce the | |
4316 | same results no matter the host. */ | |
4317 | ||
4318 | if ((!a->is_null) - (!b->is_null)) | |
4319 | return ((!a->is_null) - (!b->is_null)); | |
4320 | return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela); | |
e0001a05 NC |
4321 | } |
4322 | ||
43cd72b9 BW |
4323 | \f |
4324 | /* Literal values and value hash tables. */ | |
e0001a05 | 4325 | |
43cd72b9 BW |
4326 | /* Literals with the same value can be coalesced. The literal_value |
4327 | structure records the value of a literal: the "r_rel" field holds the | |
4328 | information from the relocation on the literal (if there is one) and | |
4329 | the "value" field holds the contents of the literal word itself. | |
e0001a05 | 4330 | |
43cd72b9 BW |
4331 | The value_map structure records a literal value along with the |
4332 | location of a literal holding that value. The value_map hash table | |
4333 | is indexed by the literal value, so that we can quickly check if a | |
4334 | particular literal value has been seen before and is thus a candidate | |
4335 | for coalescing. */ | |
e0001a05 | 4336 | |
43cd72b9 BW |
4337 | typedef struct literal_value_struct literal_value; |
4338 | typedef struct value_map_struct value_map; | |
4339 | typedef struct value_map_hash_table_struct value_map_hash_table; | |
e0001a05 | 4340 | |
43cd72b9 | 4341 | struct literal_value_struct |
e0001a05 | 4342 | { |
43cd72b9 BW |
4343 | r_reloc r_rel; |
4344 | unsigned long value; | |
4345 | bfd_boolean is_abs_literal; | |
4346 | }; | |
4347 | ||
4348 | struct value_map_struct | |
4349 | { | |
4350 | literal_value val; /* The literal value. */ | |
4351 | r_reloc loc; /* Location of the literal. */ | |
4352 | value_map *next; | |
4353 | }; | |
4354 | ||
4355 | struct value_map_hash_table_struct | |
4356 | { | |
4357 | unsigned bucket_count; | |
4358 | value_map **buckets; | |
4359 | unsigned count; | |
4360 | bfd_boolean has_last_loc; | |
4361 | r_reloc last_loc; | |
4362 | }; | |
4363 | ||
4364 | ||
e0001a05 | 4365 | static void |
7fa3d080 BW |
4366 | init_literal_value (literal_value *lit, |
4367 | const r_reloc *r_rel, | |
4368 | unsigned long value, | |
4369 | bfd_boolean is_abs_literal) | |
e0001a05 | 4370 | { |
43cd72b9 BW |
4371 | lit->r_rel = *r_rel; |
4372 | lit->value = value; | |
4373 | lit->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
4374 | } |
4375 | ||
4376 | ||
43cd72b9 | 4377 | static bfd_boolean |
7fa3d080 BW |
4378 | literal_value_equal (const literal_value *src1, |
4379 | const literal_value *src2, | |
4380 | bfd_boolean final_static_link) | |
e0001a05 | 4381 | { |
43cd72b9 | 4382 | struct elf_link_hash_entry *h1, *h2; |
e0001a05 | 4383 | |
43cd72b9 BW |
4384 | if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel)) |
4385 | return FALSE; | |
e0001a05 | 4386 | |
43cd72b9 BW |
4387 | if (r_reloc_is_const (&src1->r_rel)) |
4388 | return (src1->value == src2->value); | |
e0001a05 | 4389 | |
43cd72b9 BW |
4390 | if (ELF32_R_TYPE (src1->r_rel.rela.r_info) |
4391 | != ELF32_R_TYPE (src2->r_rel.rela.r_info)) | |
4392 | return FALSE; | |
e0001a05 | 4393 | |
43cd72b9 BW |
4394 | if (src1->r_rel.target_offset != src2->r_rel.target_offset) |
4395 | return FALSE; | |
4396 | ||
4397 | if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset) | |
4398 | return FALSE; | |
4399 | ||
4400 | if (src1->value != src2->value) | |
4401 | return FALSE; | |
4402 | ||
4403 | /* Now check for the same section (if defined) or the same elf_hash | |
4404 | (if undefined or weak). */ | |
4405 | h1 = r_reloc_get_hash_entry (&src1->r_rel); | |
4406 | h2 = r_reloc_get_hash_entry (&src2->r_rel); | |
4407 | if (r_reloc_is_defined (&src1->r_rel) | |
4408 | && (final_static_link | |
4409 | || ((!h1 || h1->root.type != bfd_link_hash_defweak) | |
4410 | && (!h2 || h2->root.type != bfd_link_hash_defweak)))) | |
4411 | { | |
4412 | if (r_reloc_get_section (&src1->r_rel) | |
4413 | != r_reloc_get_section (&src2->r_rel)) | |
4414 | return FALSE; | |
4415 | } | |
4416 | else | |
4417 | { | |
4418 | /* Require that the hash entries (i.e., symbols) be identical. */ | |
4419 | if (h1 != h2 || h1 == 0) | |
4420 | return FALSE; | |
4421 | } | |
4422 | ||
4423 | if (src1->is_abs_literal != src2->is_abs_literal) | |
4424 | return FALSE; | |
4425 | ||
4426 | return TRUE; | |
e0001a05 NC |
4427 | } |
4428 | ||
e0001a05 | 4429 | |
43cd72b9 BW |
4430 | /* Must be power of 2. */ |
4431 | #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024 | |
e0001a05 | 4432 | |
43cd72b9 | 4433 | static value_map_hash_table * |
7fa3d080 | 4434 | value_map_hash_table_init (void) |
43cd72b9 BW |
4435 | { |
4436 | value_map_hash_table *values; | |
e0001a05 | 4437 | |
43cd72b9 BW |
4438 | values = (value_map_hash_table *) |
4439 | bfd_zmalloc (sizeof (value_map_hash_table)); | |
4440 | values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT; | |
4441 | values->count = 0; | |
4442 | values->buckets = (value_map **) | |
4443 | bfd_zmalloc (sizeof (value_map *) * values->bucket_count); | |
4444 | if (values->buckets == NULL) | |
4445 | { | |
4446 | free (values); | |
4447 | return NULL; | |
4448 | } | |
4449 | values->has_last_loc = FALSE; | |
4450 | ||
4451 | return values; | |
4452 | } | |
4453 | ||
4454 | ||
4455 | static void | |
7fa3d080 | 4456 | value_map_hash_table_delete (value_map_hash_table *table) |
e0001a05 | 4457 | { |
43cd72b9 BW |
4458 | free (table->buckets); |
4459 | free (table); | |
4460 | } | |
4461 | ||
4462 | ||
4463 | static unsigned | |
7fa3d080 | 4464 | hash_bfd_vma (bfd_vma val) |
43cd72b9 BW |
4465 | { |
4466 | return (val >> 2) + (val >> 10); | |
4467 | } | |
4468 | ||
4469 | ||
4470 | static unsigned | |
7fa3d080 | 4471 | literal_value_hash (const literal_value *src) |
43cd72b9 BW |
4472 | { |
4473 | unsigned hash_val; | |
e0001a05 | 4474 | |
43cd72b9 BW |
4475 | hash_val = hash_bfd_vma (src->value); |
4476 | if (!r_reloc_is_const (&src->r_rel)) | |
e0001a05 | 4477 | { |
43cd72b9 BW |
4478 | void *sec_or_hash; |
4479 | ||
4480 | hash_val += hash_bfd_vma (src->is_abs_literal * 1000); | |
4481 | hash_val += hash_bfd_vma (src->r_rel.target_offset); | |
4482 | hash_val += hash_bfd_vma (src->r_rel.virtual_offset); | |
4483 | ||
4484 | /* Now check for the same section and the same elf_hash. */ | |
4485 | if (r_reloc_is_defined (&src->r_rel)) | |
4486 | sec_or_hash = r_reloc_get_section (&src->r_rel); | |
4487 | else | |
4488 | sec_or_hash = r_reloc_get_hash_entry (&src->r_rel); | |
f60ca5e3 | 4489 | hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash); |
e0001a05 | 4490 | } |
43cd72b9 BW |
4491 | return hash_val; |
4492 | } | |
e0001a05 | 4493 | |
e0001a05 | 4494 | |
43cd72b9 | 4495 | /* Check if the specified literal_value has been seen before. */ |
e0001a05 | 4496 | |
43cd72b9 | 4497 | static value_map * |
7fa3d080 BW |
4498 | value_map_get_cached_value (value_map_hash_table *map, |
4499 | const literal_value *val, | |
4500 | bfd_boolean final_static_link) | |
43cd72b9 BW |
4501 | { |
4502 | value_map *map_e; | |
4503 | value_map *bucket; | |
4504 | unsigned idx; | |
4505 | ||
4506 | idx = literal_value_hash (val); | |
4507 | idx = idx & (map->bucket_count - 1); | |
4508 | bucket = map->buckets[idx]; | |
4509 | for (map_e = bucket; map_e; map_e = map_e->next) | |
e0001a05 | 4510 | { |
43cd72b9 BW |
4511 | if (literal_value_equal (&map_e->val, val, final_static_link)) |
4512 | return map_e; | |
4513 | } | |
4514 | return NULL; | |
4515 | } | |
e0001a05 | 4516 | |
e0001a05 | 4517 | |
43cd72b9 BW |
4518 | /* Record a new literal value. It is illegal to call this if VALUE |
4519 | already has an entry here. */ | |
4520 | ||
4521 | static value_map * | |
7fa3d080 BW |
4522 | add_value_map (value_map_hash_table *map, |
4523 | const literal_value *val, | |
4524 | const r_reloc *loc, | |
4525 | bfd_boolean final_static_link) | |
43cd72b9 BW |
4526 | { |
4527 | value_map **bucket_p; | |
4528 | unsigned idx; | |
4529 | ||
4530 | value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map)); | |
4531 | if (val_e == NULL) | |
4532 | { | |
4533 | bfd_set_error (bfd_error_no_memory); | |
4534 | return NULL; | |
e0001a05 NC |
4535 | } |
4536 | ||
43cd72b9 BW |
4537 | BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link)); |
4538 | val_e->val = *val; | |
4539 | val_e->loc = *loc; | |
4540 | ||
4541 | idx = literal_value_hash (val); | |
4542 | idx = idx & (map->bucket_count - 1); | |
4543 | bucket_p = &map->buckets[idx]; | |
4544 | ||
4545 | val_e->next = *bucket_p; | |
4546 | *bucket_p = val_e; | |
4547 | map->count++; | |
4548 | /* FIXME: Consider resizing the hash table if we get too many entries. */ | |
4549 | ||
4550 | return val_e; | |
e0001a05 NC |
4551 | } |
4552 | ||
43cd72b9 BW |
4553 | \f |
4554 | /* Lists of text actions (ta_) for narrowing, widening, longcall | |
4555 | conversion, space fill, code & literal removal, etc. */ | |
4556 | ||
4557 | /* The following text actions are generated: | |
4558 | ||
4559 | "ta_remove_insn" remove an instruction or instructions | |
4560 | "ta_remove_longcall" convert longcall to call | |
4561 | "ta_convert_longcall" convert longcall to nop/call | |
4562 | "ta_narrow_insn" narrow a wide instruction | |
4563 | "ta_widen" widen a narrow instruction | |
4564 | "ta_fill" add fill or remove fill | |
4565 | removed < 0 is a fill; branches to the fill address will be | |
4566 | changed to address + fill size (e.g., address - removed) | |
4567 | removed >= 0 branches to the fill address will stay unchanged | |
4568 | "ta_remove_literal" remove a literal; this action is | |
4569 | indicated when a literal is removed | |
4570 | or replaced. | |
4571 | "ta_add_literal" insert a new literal; this action is | |
4572 | indicated when a literal has been moved. | |
4573 | It may use a virtual_offset because | |
4574 | multiple literals can be placed at the | |
4575 | same location. | |
4576 | ||
4577 | For each of these text actions, we also record the number of bytes | |
4578 | removed by performing the text action. In the case of a "ta_widen" | |
4579 | or a "ta_fill" that adds space, the removed_bytes will be negative. */ | |
4580 | ||
4581 | typedef struct text_action_struct text_action; | |
4582 | typedef struct text_action_list_struct text_action_list; | |
4583 | typedef enum text_action_enum_t text_action_t; | |
4584 | ||
4585 | enum text_action_enum_t | |
4586 | { | |
4587 | ta_none, | |
4588 | ta_remove_insn, /* removed = -size */ | |
4589 | ta_remove_longcall, /* removed = -size */ | |
4590 | ta_convert_longcall, /* removed = 0 */ | |
4591 | ta_narrow_insn, /* removed = -1 */ | |
4592 | ta_widen_insn, /* removed = +1 */ | |
4593 | ta_fill, /* removed = +size */ | |
4594 | ta_remove_literal, | |
4595 | ta_add_literal | |
4596 | }; | |
e0001a05 | 4597 | |
e0001a05 | 4598 | |
43cd72b9 BW |
4599 | /* Structure for a text action record. */ |
4600 | struct text_action_struct | |
e0001a05 | 4601 | { |
43cd72b9 BW |
4602 | text_action_t action; |
4603 | asection *sec; /* Optional */ | |
4604 | bfd_vma offset; | |
4605 | bfd_vma virtual_offset; /* Zero except for adding literals. */ | |
4606 | int removed_bytes; | |
4607 | literal_value value; /* Only valid when adding literals. */ | |
e0001a05 | 4608 | |
43cd72b9 BW |
4609 | text_action *next; |
4610 | }; | |
e0001a05 | 4611 | |
e0001a05 | 4612 | |
43cd72b9 BW |
4613 | /* List of all of the actions taken on a text section. */ |
4614 | struct text_action_list_struct | |
4615 | { | |
4616 | text_action *head; | |
4617 | }; | |
e0001a05 | 4618 | |
e0001a05 | 4619 | |
7fa3d080 BW |
4620 | static text_action * |
4621 | find_fill_action (text_action_list *l, asection *sec, bfd_vma offset) | |
43cd72b9 BW |
4622 | { |
4623 | text_action **m_p; | |
4624 | ||
4625 | /* It is not necessary to fill at the end of a section. */ | |
4626 | if (sec->size == offset) | |
4627 | return NULL; | |
4628 | ||
7fa3d080 | 4629 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
4630 | { |
4631 | text_action *t = *m_p; | |
4632 | /* When the action is another fill at the same address, | |
4633 | just increase the size. */ | |
4634 | if (t->offset == offset && t->action == ta_fill) | |
4635 | return t; | |
4636 | } | |
4637 | return NULL; | |
4638 | } | |
4639 | ||
4640 | ||
4641 | static int | |
7fa3d080 BW |
4642 | compute_removed_action_diff (const text_action *ta, |
4643 | asection *sec, | |
4644 | bfd_vma offset, | |
4645 | int removed, | |
4646 | int removable_space) | |
43cd72b9 BW |
4647 | { |
4648 | int new_removed; | |
4649 | int current_removed = 0; | |
4650 | ||
7fa3d080 | 4651 | if (ta) |
43cd72b9 BW |
4652 | current_removed = ta->removed_bytes; |
4653 | ||
4654 | BFD_ASSERT (ta == NULL || ta->offset == offset); | |
4655 | BFD_ASSERT (ta == NULL || ta->action == ta_fill); | |
4656 | ||
4657 | /* It is not necessary to fill at the end of a section. Clean this up. */ | |
4658 | if (sec->size == offset) | |
4659 | new_removed = removable_space - 0; | |
4660 | else | |
4661 | { | |
4662 | int space; | |
4663 | int added = -removed - current_removed; | |
4664 | /* Ignore multiples of the section alignment. */ | |
4665 | added = ((1 << sec->alignment_power) - 1) & added; | |
4666 | new_removed = (-added); | |
4667 | ||
4668 | /* Modify for removable. */ | |
4669 | space = removable_space - new_removed; | |
4670 | new_removed = (removable_space | |
4671 | - (((1 << sec->alignment_power) - 1) & space)); | |
4672 | } | |
4673 | return (new_removed - current_removed); | |
4674 | } | |
4675 | ||
4676 | ||
7fa3d080 BW |
4677 | static void |
4678 | adjust_fill_action (text_action *ta, int fill_diff) | |
43cd72b9 BW |
4679 | { |
4680 | ta->removed_bytes += fill_diff; | |
4681 | } | |
4682 | ||
4683 | ||
4684 | /* Add a modification action to the text. For the case of adding or | |
4685 | removing space, modify any current fill and assume that | |
4686 | "unreachable_space" bytes can be freely contracted. Note that a | |
4687 | negative removed value is a fill. */ | |
4688 | ||
4689 | static void | |
7fa3d080 BW |
4690 | text_action_add (text_action_list *l, |
4691 | text_action_t action, | |
4692 | asection *sec, | |
4693 | bfd_vma offset, | |
4694 | int removed) | |
43cd72b9 BW |
4695 | { |
4696 | text_action **m_p; | |
4697 | text_action *ta; | |
4698 | ||
4699 | /* It is not necessary to fill at the end of a section. */ | |
4700 | if (action == ta_fill && sec->size == offset) | |
4701 | return; | |
4702 | ||
4703 | /* It is not necessary to fill 0 bytes. */ | |
4704 | if (action == ta_fill && removed == 0) | |
4705 | return; | |
4706 | ||
7fa3d080 | 4707 | for (m_p = &l->head; *m_p && (*m_p)->offset <= offset; m_p = &(*m_p)->next) |
43cd72b9 BW |
4708 | { |
4709 | text_action *t = *m_p; | |
4710 | /* When the action is another fill at the same address, | |
4711 | just increase the size. */ | |
4712 | if (t->offset == offset && t->action == ta_fill && action == ta_fill) | |
4713 | { | |
4714 | t->removed_bytes += removed; | |
4715 | return; | |
4716 | } | |
4717 | } | |
4718 | ||
4719 | /* Create a new record and fill it up. */ | |
4720 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
4721 | ta->action = action; | |
4722 | ta->sec = sec; | |
4723 | ta->offset = offset; | |
4724 | ta->removed_bytes = removed; | |
4725 | ta->next = (*m_p); | |
4726 | *m_p = ta; | |
4727 | } | |
4728 | ||
4729 | ||
4730 | static void | |
7fa3d080 BW |
4731 | text_action_add_literal (text_action_list *l, |
4732 | text_action_t action, | |
4733 | const r_reloc *loc, | |
4734 | const literal_value *value, | |
4735 | int removed) | |
43cd72b9 BW |
4736 | { |
4737 | text_action **m_p; | |
4738 | text_action *ta; | |
4739 | asection *sec = r_reloc_get_section (loc); | |
4740 | bfd_vma offset = loc->target_offset; | |
4741 | bfd_vma virtual_offset = loc->virtual_offset; | |
4742 | ||
4743 | BFD_ASSERT (action == ta_add_literal); | |
4744 | ||
4745 | for (m_p = &l->head; *m_p != NULL; m_p = &(*m_p)->next) | |
4746 | { | |
4747 | if ((*m_p)->offset > offset | |
4748 | && ((*m_p)->offset != offset | |
4749 | || (*m_p)->virtual_offset > virtual_offset)) | |
4750 | break; | |
4751 | } | |
4752 | ||
4753 | /* Create a new record and fill it up. */ | |
4754 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
4755 | ta->action = action; | |
4756 | ta->sec = sec; | |
4757 | ta->offset = offset; | |
4758 | ta->virtual_offset = virtual_offset; | |
4759 | ta->value = *value; | |
4760 | ta->removed_bytes = removed; | |
4761 | ta->next = (*m_p); | |
4762 | *m_p = ta; | |
4763 | } | |
4764 | ||
4765 | ||
7fa3d080 BW |
4766 | static bfd_vma |
4767 | offset_with_removed_text (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 BW |
4768 | { |
4769 | text_action *r; | |
4770 | int removed = 0; | |
4771 | ||
4772 | for (r = action_list->head; r && r->offset <= offset; r = r->next) | |
4773 | { | |
4774 | if (r->offset < offset | |
4775 | || (r->action == ta_fill && r->removed_bytes < 0)) | |
4776 | removed += r->removed_bytes; | |
4777 | } | |
4778 | ||
4779 | return (offset - removed); | |
4780 | } | |
4781 | ||
4782 | ||
03e94c08 BW |
4783 | static unsigned |
4784 | action_list_count (text_action_list *action_list) | |
4785 | { | |
4786 | text_action *r = action_list->head; | |
4787 | unsigned count = 0; | |
4788 | for (r = action_list->head; r != NULL; r = r->next) | |
4789 | { | |
4790 | count++; | |
4791 | } | |
4792 | return count; | |
4793 | } | |
4794 | ||
4795 | ||
7fa3d080 BW |
4796 | static bfd_vma |
4797 | offset_with_removed_text_before_fill (text_action_list *action_list, | |
4798 | bfd_vma offset) | |
43cd72b9 BW |
4799 | { |
4800 | text_action *r; | |
4801 | int removed = 0; | |
4802 | ||
4803 | for (r = action_list->head; r && r->offset < offset; r = r->next) | |
4804 | removed += r->removed_bytes; | |
4805 | ||
4806 | return (offset - removed); | |
4807 | } | |
4808 | ||
4809 | ||
4810 | /* The find_insn_action routine will only find non-fill actions. */ | |
4811 | ||
7fa3d080 BW |
4812 | static text_action * |
4813 | find_insn_action (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 BW |
4814 | { |
4815 | text_action *t; | |
4816 | for (t = action_list->head; t; t = t->next) | |
4817 | { | |
4818 | if (t->offset == offset) | |
4819 | { | |
4820 | switch (t->action) | |
4821 | { | |
4822 | case ta_none: | |
4823 | case ta_fill: | |
4824 | break; | |
4825 | case ta_remove_insn: | |
4826 | case ta_remove_longcall: | |
4827 | case ta_convert_longcall: | |
4828 | case ta_narrow_insn: | |
4829 | case ta_widen_insn: | |
4830 | return t; | |
4831 | case ta_remove_literal: | |
4832 | case ta_add_literal: | |
4833 | BFD_ASSERT (0); | |
4834 | break; | |
4835 | } | |
4836 | } | |
4837 | } | |
4838 | return NULL; | |
4839 | } | |
4840 | ||
4841 | ||
4842 | #if DEBUG | |
4843 | ||
4844 | static void | |
7fa3d080 | 4845 | print_action_list (FILE *fp, text_action_list *action_list) |
43cd72b9 BW |
4846 | { |
4847 | text_action *r; | |
4848 | ||
4849 | fprintf (fp, "Text Action\n"); | |
4850 | for (r = action_list->head; r != NULL; r = r->next) | |
4851 | { | |
4852 | const char *t = "unknown"; | |
4853 | switch (r->action) | |
4854 | { | |
4855 | case ta_remove_insn: | |
4856 | t = "remove_insn"; break; | |
4857 | case ta_remove_longcall: | |
4858 | t = "remove_longcall"; break; | |
4859 | case ta_convert_longcall: | |
4860 | t = "remove_longcall"; break; | |
4861 | case ta_narrow_insn: | |
4862 | t = "narrow_insn"; break; | |
4863 | case ta_widen_insn: | |
4864 | t = "widen_insn"; break; | |
4865 | case ta_fill: | |
4866 | t = "fill"; break; | |
4867 | case ta_none: | |
4868 | t = "none"; break; | |
4869 | case ta_remove_literal: | |
4870 | t = "remove_literal"; break; | |
4871 | case ta_add_literal: | |
4872 | t = "add_literal"; break; | |
4873 | } | |
4874 | ||
4875 | fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n", | |
4876 | r->sec->owner->filename, | |
4877 | r->sec->name, r->offset, t, r->removed_bytes); | |
4878 | } | |
4879 | } | |
4880 | ||
4881 | #endif /* DEBUG */ | |
4882 | ||
4883 | \f | |
4884 | /* Lists of literals being coalesced or removed. */ | |
4885 | ||
4886 | /* In the usual case, the literal identified by "from" is being | |
4887 | coalesced with another literal identified by "to". If the literal is | |
4888 | unused and is being removed altogether, "to.abfd" will be NULL. | |
4889 | The removed_literal entries are kept on a per-section list, sorted | |
4890 | by the "from" offset field. */ | |
4891 | ||
4892 | typedef struct removed_literal_struct removed_literal; | |
4893 | typedef struct removed_literal_list_struct removed_literal_list; | |
4894 | ||
4895 | struct removed_literal_struct | |
4896 | { | |
4897 | r_reloc from; | |
4898 | r_reloc to; | |
4899 | removed_literal *next; | |
4900 | }; | |
4901 | ||
4902 | struct removed_literal_list_struct | |
4903 | { | |
4904 | removed_literal *head; | |
4905 | removed_literal *tail; | |
4906 | }; | |
4907 | ||
4908 | ||
43cd72b9 BW |
4909 | /* Record that the literal at "from" is being removed. If "to" is not |
4910 | NULL, the "from" literal is being coalesced with the "to" literal. */ | |
4911 | ||
4912 | static void | |
7fa3d080 BW |
4913 | add_removed_literal (removed_literal_list *removed_list, |
4914 | const r_reloc *from, | |
4915 | const r_reloc *to) | |
43cd72b9 BW |
4916 | { |
4917 | removed_literal *r, *new_r, *next_r; | |
4918 | ||
4919 | new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal)); | |
4920 | ||
4921 | new_r->from = *from; | |
4922 | if (to) | |
4923 | new_r->to = *to; | |
4924 | else | |
4925 | new_r->to.abfd = NULL; | |
4926 | new_r->next = NULL; | |
4927 | ||
4928 | r = removed_list->head; | |
4929 | if (r == NULL) | |
4930 | { | |
4931 | removed_list->head = new_r; | |
4932 | removed_list->tail = new_r; | |
4933 | } | |
4934 | /* Special check for common case of append. */ | |
4935 | else if (removed_list->tail->from.target_offset < from->target_offset) | |
4936 | { | |
4937 | removed_list->tail->next = new_r; | |
4938 | removed_list->tail = new_r; | |
4939 | } | |
4940 | else | |
4941 | { | |
7fa3d080 | 4942 | while (r->from.target_offset < from->target_offset && r->next) |
43cd72b9 BW |
4943 | { |
4944 | r = r->next; | |
4945 | } | |
4946 | next_r = r->next; | |
4947 | r->next = new_r; | |
4948 | new_r->next = next_r; | |
4949 | if (next_r == NULL) | |
4950 | removed_list->tail = new_r; | |
4951 | } | |
4952 | } | |
4953 | ||
4954 | ||
4955 | /* Check if the list of removed literals contains an entry for the | |
4956 | given address. Return the entry if found. */ | |
4957 | ||
4958 | static removed_literal * | |
7fa3d080 | 4959 | find_removed_literal (removed_literal_list *removed_list, bfd_vma addr) |
43cd72b9 BW |
4960 | { |
4961 | removed_literal *r = removed_list->head; | |
4962 | while (r && r->from.target_offset < addr) | |
4963 | r = r->next; | |
4964 | if (r && r->from.target_offset == addr) | |
4965 | return r; | |
4966 | return NULL; | |
4967 | } | |
4968 | ||
4969 | ||
4970 | #if DEBUG | |
4971 | ||
4972 | static void | |
7fa3d080 | 4973 | print_removed_literals (FILE *fp, removed_literal_list *removed_list) |
43cd72b9 BW |
4974 | { |
4975 | removed_literal *r; | |
4976 | r = removed_list->head; | |
4977 | if (r) | |
4978 | fprintf (fp, "Removed Literals\n"); | |
4979 | for (; r != NULL; r = r->next) | |
4980 | { | |
4981 | print_r_reloc (fp, &r->from); | |
4982 | fprintf (fp, " => "); | |
4983 | if (r->to.abfd == NULL) | |
4984 | fprintf (fp, "REMOVED"); | |
4985 | else | |
4986 | print_r_reloc (fp, &r->to); | |
4987 | fprintf (fp, "\n"); | |
4988 | } | |
4989 | } | |
4990 | ||
4991 | #endif /* DEBUG */ | |
4992 | ||
4993 | \f | |
4994 | /* Per-section data for relaxation. */ | |
4995 | ||
4996 | typedef struct reloc_bfd_fix_struct reloc_bfd_fix; | |
4997 | ||
4998 | struct xtensa_relax_info_struct | |
4999 | { | |
5000 | bfd_boolean is_relaxable_literal_section; | |
5001 | bfd_boolean is_relaxable_asm_section; | |
5002 | int visited; /* Number of times visited. */ | |
5003 | ||
5004 | source_reloc *src_relocs; /* Array[src_count]. */ | |
5005 | int src_count; | |
5006 | int src_next; /* Next src_relocs entry to assign. */ | |
5007 | ||
5008 | removed_literal_list removed_list; | |
5009 | text_action_list action_list; | |
5010 | ||
5011 | reloc_bfd_fix *fix_list; | |
5012 | reloc_bfd_fix *fix_array; | |
5013 | unsigned fix_array_count; | |
5014 | ||
5015 | /* Support for expanding the reloc array that is stored | |
5016 | in the section structure. If the relocations have been | |
5017 | reallocated, the newly allocated relocations will be referenced | |
5018 | here along with the actual size allocated. The relocation | |
5019 | count will always be found in the section structure. */ | |
5020 | Elf_Internal_Rela *allocated_relocs; | |
5021 | unsigned relocs_count; | |
5022 | unsigned allocated_relocs_count; | |
5023 | }; | |
5024 | ||
5025 | struct elf_xtensa_section_data | |
5026 | { | |
5027 | struct bfd_elf_section_data elf; | |
5028 | xtensa_relax_info relax_info; | |
5029 | }; | |
5030 | ||
43cd72b9 BW |
5031 | |
5032 | static bfd_boolean | |
7fa3d080 | 5033 | elf_xtensa_new_section_hook (bfd *abfd, asection *sec) |
43cd72b9 | 5034 | { |
f592407e AM |
5035 | if (!sec->used_by_bfd) |
5036 | { | |
5037 | struct elf_xtensa_section_data *sdata; | |
5038 | bfd_size_type amt = sizeof (*sdata); | |
43cd72b9 | 5039 | |
f592407e AM |
5040 | sdata = bfd_zalloc (abfd, amt); |
5041 | if (sdata == NULL) | |
5042 | return FALSE; | |
5043 | sec->used_by_bfd = sdata; | |
5044 | } | |
43cd72b9 BW |
5045 | |
5046 | return _bfd_elf_new_section_hook (abfd, sec); | |
5047 | } | |
5048 | ||
5049 | ||
7fa3d080 BW |
5050 | static xtensa_relax_info * |
5051 | get_xtensa_relax_info (asection *sec) | |
5052 | { | |
5053 | struct elf_xtensa_section_data *section_data; | |
5054 | ||
5055 | /* No info available if no section or if it is an output section. */ | |
5056 | if (!sec || sec == sec->output_section) | |
5057 | return NULL; | |
5058 | ||
5059 | section_data = (struct elf_xtensa_section_data *) elf_section_data (sec); | |
5060 | return §ion_data->relax_info; | |
5061 | } | |
5062 | ||
5063 | ||
43cd72b9 | 5064 | static void |
7fa3d080 | 5065 | init_xtensa_relax_info (asection *sec) |
43cd72b9 BW |
5066 | { |
5067 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5068 | ||
5069 | relax_info->is_relaxable_literal_section = FALSE; | |
5070 | relax_info->is_relaxable_asm_section = FALSE; | |
5071 | relax_info->visited = 0; | |
5072 | ||
5073 | relax_info->src_relocs = NULL; | |
5074 | relax_info->src_count = 0; | |
5075 | relax_info->src_next = 0; | |
5076 | ||
5077 | relax_info->removed_list.head = NULL; | |
5078 | relax_info->removed_list.tail = NULL; | |
5079 | ||
5080 | relax_info->action_list.head = NULL; | |
5081 | ||
5082 | relax_info->fix_list = NULL; | |
5083 | relax_info->fix_array = NULL; | |
5084 | relax_info->fix_array_count = 0; | |
5085 | ||
5086 | relax_info->allocated_relocs = NULL; | |
5087 | relax_info->relocs_count = 0; | |
5088 | relax_info->allocated_relocs_count = 0; | |
5089 | } | |
5090 | ||
43cd72b9 BW |
5091 | \f |
5092 | /* Coalescing literals may require a relocation to refer to a section in | |
5093 | a different input file, but the standard relocation information | |
5094 | cannot express that. Instead, the reloc_bfd_fix structures are used | |
5095 | to "fix" the relocations that refer to sections in other input files. | |
5096 | These structures are kept on per-section lists. The "src_type" field | |
5097 | records the relocation type in case there are multiple relocations on | |
5098 | the same location. FIXME: This is ugly; an alternative might be to | |
5099 | add new symbols with the "owner" field to some other input file. */ | |
5100 | ||
5101 | struct reloc_bfd_fix_struct | |
5102 | { | |
5103 | asection *src_sec; | |
5104 | bfd_vma src_offset; | |
5105 | unsigned src_type; /* Relocation type. */ | |
5106 | ||
5107 | bfd *target_abfd; | |
5108 | asection *target_sec; | |
5109 | bfd_vma target_offset; | |
5110 | bfd_boolean translated; | |
5111 | ||
5112 | reloc_bfd_fix *next; | |
5113 | }; | |
5114 | ||
5115 | ||
43cd72b9 | 5116 | static reloc_bfd_fix * |
7fa3d080 BW |
5117 | reloc_bfd_fix_init (asection *src_sec, |
5118 | bfd_vma src_offset, | |
5119 | unsigned src_type, | |
5120 | bfd *target_abfd, | |
5121 | asection *target_sec, | |
5122 | bfd_vma target_offset, | |
5123 | bfd_boolean translated) | |
43cd72b9 BW |
5124 | { |
5125 | reloc_bfd_fix *fix; | |
5126 | ||
5127 | fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix)); | |
5128 | fix->src_sec = src_sec; | |
5129 | fix->src_offset = src_offset; | |
5130 | fix->src_type = src_type; | |
5131 | fix->target_abfd = target_abfd; | |
5132 | fix->target_sec = target_sec; | |
5133 | fix->target_offset = target_offset; | |
5134 | fix->translated = translated; | |
5135 | ||
5136 | return fix; | |
5137 | } | |
5138 | ||
5139 | ||
5140 | static void | |
7fa3d080 | 5141 | add_fix (asection *src_sec, reloc_bfd_fix *fix) |
43cd72b9 BW |
5142 | { |
5143 | xtensa_relax_info *relax_info; | |
5144 | ||
5145 | relax_info = get_xtensa_relax_info (src_sec); | |
5146 | fix->next = relax_info->fix_list; | |
5147 | relax_info->fix_list = fix; | |
5148 | } | |
5149 | ||
5150 | ||
5151 | static int | |
7fa3d080 | 5152 | fix_compare (const void *ap, const void *bp) |
43cd72b9 BW |
5153 | { |
5154 | const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap; | |
5155 | const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp; | |
5156 | ||
5157 | if (a->src_offset != b->src_offset) | |
5158 | return (a->src_offset - b->src_offset); | |
5159 | return (a->src_type - b->src_type); | |
5160 | } | |
5161 | ||
5162 | ||
5163 | static void | |
7fa3d080 | 5164 | cache_fix_array (asection *sec) |
43cd72b9 BW |
5165 | { |
5166 | unsigned i, count = 0; | |
5167 | reloc_bfd_fix *r; | |
5168 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5169 | ||
5170 | if (relax_info == NULL) | |
5171 | return; | |
5172 | if (relax_info->fix_list == NULL) | |
5173 | return; | |
5174 | ||
5175 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
5176 | count++; | |
5177 | ||
5178 | relax_info->fix_array = | |
5179 | (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count); | |
5180 | relax_info->fix_array_count = count; | |
5181 | ||
5182 | r = relax_info->fix_list; | |
5183 | for (i = 0; i < count; i++, r = r->next) | |
5184 | { | |
5185 | relax_info->fix_array[count - 1 - i] = *r; | |
5186 | relax_info->fix_array[count - 1 - i].next = NULL; | |
5187 | } | |
5188 | ||
5189 | qsort (relax_info->fix_array, relax_info->fix_array_count, | |
5190 | sizeof (reloc_bfd_fix), fix_compare); | |
5191 | } | |
5192 | ||
5193 | ||
5194 | static reloc_bfd_fix * | |
7fa3d080 | 5195 | get_bfd_fix (asection *sec, bfd_vma offset, unsigned type) |
43cd72b9 BW |
5196 | { |
5197 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
5198 | reloc_bfd_fix *rv; | |
5199 | reloc_bfd_fix key; | |
5200 | ||
5201 | if (relax_info == NULL) | |
5202 | return NULL; | |
5203 | if (relax_info->fix_list == NULL) | |
5204 | return NULL; | |
5205 | ||
5206 | if (relax_info->fix_array == NULL) | |
5207 | cache_fix_array (sec); | |
5208 | ||
5209 | key.src_offset = offset; | |
5210 | key.src_type = type; | |
5211 | rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count, | |
5212 | sizeof (reloc_bfd_fix), fix_compare); | |
5213 | return rv; | |
5214 | } | |
5215 | ||
5216 | \f | |
5217 | /* Section caching. */ | |
5218 | ||
5219 | typedef struct section_cache_struct section_cache_t; | |
5220 | ||
5221 | struct section_cache_struct | |
5222 | { | |
5223 | asection *sec; | |
5224 | ||
5225 | bfd_byte *contents; /* Cache of the section contents. */ | |
5226 | bfd_size_type content_length; | |
5227 | ||
5228 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
5229 | unsigned pte_count; | |
5230 | ||
5231 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
5232 | unsigned reloc_count; | |
5233 | }; | |
5234 | ||
5235 | ||
7fa3d080 BW |
5236 | static void |
5237 | init_section_cache (section_cache_t *sec_cache) | |
5238 | { | |
5239 | memset (sec_cache, 0, sizeof (*sec_cache)); | |
5240 | } | |
43cd72b9 BW |
5241 | |
5242 | ||
5243 | static void | |
7fa3d080 | 5244 | clear_section_cache (section_cache_t *sec_cache) |
43cd72b9 | 5245 | { |
7fa3d080 BW |
5246 | if (sec_cache->sec) |
5247 | { | |
5248 | release_contents (sec_cache->sec, sec_cache->contents); | |
5249 | release_internal_relocs (sec_cache->sec, sec_cache->relocs); | |
5250 | if (sec_cache->ptbl) | |
5251 | free (sec_cache->ptbl); | |
5252 | memset (sec_cache, 0, sizeof (sec_cache)); | |
5253 | } | |
43cd72b9 BW |
5254 | } |
5255 | ||
5256 | ||
5257 | static bfd_boolean | |
7fa3d080 BW |
5258 | section_cache_section (section_cache_t *sec_cache, |
5259 | asection *sec, | |
5260 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
5261 | { |
5262 | bfd *abfd; | |
5263 | property_table_entry *prop_table = NULL; | |
5264 | int ptblsize = 0; | |
5265 | bfd_byte *contents = NULL; | |
5266 | Elf_Internal_Rela *internal_relocs = NULL; | |
5267 | bfd_size_type sec_size; | |
5268 | ||
5269 | if (sec == NULL) | |
5270 | return FALSE; | |
5271 | if (sec == sec_cache->sec) | |
5272 | return TRUE; | |
5273 | ||
5274 | abfd = sec->owner; | |
5275 | sec_size = bfd_get_section_limit (abfd, sec); | |
5276 | ||
5277 | /* Get the contents. */ | |
5278 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
5279 | if (contents == NULL && sec_size != 0) | |
5280 | goto err; | |
5281 | ||
5282 | /* Get the relocations. */ | |
5283 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
5284 | link_info->keep_memory); | |
5285 | ||
5286 | /* Get the entry table. */ | |
5287 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, | |
5288 | XTENSA_PROP_SEC_NAME, FALSE); | |
5289 | if (ptblsize < 0) | |
5290 | goto err; | |
5291 | ||
5292 | /* Fill in the new section cache. */ | |
5293 | clear_section_cache (sec_cache); | |
5294 | memset (sec_cache, 0, sizeof (sec_cache)); | |
5295 | ||
5296 | sec_cache->sec = sec; | |
5297 | sec_cache->contents = contents; | |
5298 | sec_cache->content_length = sec_size; | |
5299 | sec_cache->relocs = internal_relocs; | |
5300 | sec_cache->reloc_count = sec->reloc_count; | |
5301 | sec_cache->pte_count = ptblsize; | |
5302 | sec_cache->ptbl = prop_table; | |
5303 | ||
5304 | return TRUE; | |
5305 | ||
5306 | err: | |
5307 | release_contents (sec, contents); | |
5308 | release_internal_relocs (sec, internal_relocs); | |
5309 | if (prop_table) | |
5310 | free (prop_table); | |
5311 | return FALSE; | |
5312 | } | |
5313 | ||
43cd72b9 BW |
5314 | \f |
5315 | /* Extended basic blocks. */ | |
5316 | ||
5317 | /* An ebb_struct represents an Extended Basic Block. Within this | |
5318 | range, we guarantee that all instructions are decodable, the | |
5319 | property table entries are contiguous, and no property table | |
5320 | specifies a segment that cannot have instructions moved. This | |
5321 | structure contains caches of the contents, property table and | |
5322 | relocations for the specified section for easy use. The range is | |
5323 | specified by ranges of indices for the byte offset, property table | |
5324 | offsets and relocation offsets. These must be consistent. */ | |
5325 | ||
5326 | typedef struct ebb_struct ebb_t; | |
5327 | ||
5328 | struct ebb_struct | |
5329 | { | |
5330 | asection *sec; | |
5331 | ||
5332 | bfd_byte *contents; /* Cache of the section contents. */ | |
5333 | bfd_size_type content_length; | |
5334 | ||
5335 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
5336 | unsigned pte_count; | |
5337 | ||
5338 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
5339 | unsigned reloc_count; | |
5340 | ||
5341 | bfd_vma start_offset; /* Offset in section. */ | |
5342 | unsigned start_ptbl_idx; /* Offset in the property table. */ | |
5343 | unsigned start_reloc_idx; /* Offset in the relocations. */ | |
5344 | ||
5345 | bfd_vma end_offset; | |
5346 | unsigned end_ptbl_idx; | |
5347 | unsigned end_reloc_idx; | |
5348 | ||
5349 | bfd_boolean ends_section; /* Is this the last ebb in a section? */ | |
5350 | ||
5351 | /* The unreachable property table at the end of this set of blocks; | |
5352 | NULL if the end is not an unreachable block. */ | |
5353 | property_table_entry *ends_unreachable; | |
5354 | }; | |
5355 | ||
5356 | ||
5357 | enum ebb_target_enum | |
5358 | { | |
5359 | EBB_NO_ALIGN = 0, | |
5360 | EBB_DESIRE_TGT_ALIGN, | |
5361 | EBB_REQUIRE_TGT_ALIGN, | |
5362 | EBB_REQUIRE_LOOP_ALIGN, | |
5363 | EBB_REQUIRE_ALIGN | |
5364 | }; | |
5365 | ||
5366 | ||
5367 | /* proposed_action_struct is similar to the text_action_struct except | |
5368 | that is represents a potential transformation, not one that will | |
5369 | occur. We build a list of these for an extended basic block | |
5370 | and use them to compute the actual actions desired. We must be | |
5371 | careful that the entire set of actual actions we perform do not | |
5372 | break any relocations that would fit if the actions were not | |
5373 | performed. */ | |
5374 | ||
5375 | typedef struct proposed_action_struct proposed_action; | |
5376 | ||
5377 | struct proposed_action_struct | |
5378 | { | |
5379 | enum ebb_target_enum align_type; /* for the target alignment */ | |
5380 | bfd_vma alignment_pow; | |
5381 | text_action_t action; | |
5382 | bfd_vma offset; | |
5383 | int removed_bytes; | |
5384 | bfd_boolean do_action; /* If false, then we will not perform the action. */ | |
5385 | }; | |
5386 | ||
5387 | ||
5388 | /* The ebb_constraint_struct keeps a set of proposed actions for an | |
5389 | extended basic block. */ | |
5390 | ||
5391 | typedef struct ebb_constraint_struct ebb_constraint; | |
5392 | ||
5393 | struct ebb_constraint_struct | |
5394 | { | |
5395 | ebb_t ebb; | |
5396 | bfd_boolean start_movable; | |
5397 | ||
5398 | /* Bytes of extra space at the beginning if movable. */ | |
5399 | int start_extra_space; | |
5400 | ||
5401 | enum ebb_target_enum start_align; | |
5402 | ||
5403 | bfd_boolean end_movable; | |
5404 | ||
5405 | /* Bytes of extra space at the end if movable. */ | |
5406 | int end_extra_space; | |
5407 | ||
5408 | unsigned action_count; | |
5409 | unsigned action_allocated; | |
5410 | ||
5411 | /* Array of proposed actions. */ | |
5412 | proposed_action *actions; | |
5413 | ||
5414 | /* Action alignments -- one for each proposed action. */ | |
5415 | enum ebb_target_enum *action_aligns; | |
5416 | }; | |
5417 | ||
5418 | ||
43cd72b9 | 5419 | static void |
7fa3d080 | 5420 | init_ebb_constraint (ebb_constraint *c) |
43cd72b9 BW |
5421 | { |
5422 | memset (c, 0, sizeof (ebb_constraint)); | |
5423 | } | |
5424 | ||
5425 | ||
5426 | static void | |
7fa3d080 | 5427 | free_ebb_constraint (ebb_constraint *c) |
43cd72b9 | 5428 | { |
7fa3d080 | 5429 | if (c->actions) |
43cd72b9 BW |
5430 | free (c->actions); |
5431 | } | |
5432 | ||
5433 | ||
5434 | static void | |
7fa3d080 BW |
5435 | init_ebb (ebb_t *ebb, |
5436 | asection *sec, | |
5437 | bfd_byte *contents, | |
5438 | bfd_size_type content_length, | |
5439 | property_table_entry *prop_table, | |
5440 | unsigned ptblsize, | |
5441 | Elf_Internal_Rela *internal_relocs, | |
5442 | unsigned reloc_count) | |
43cd72b9 BW |
5443 | { |
5444 | memset (ebb, 0, sizeof (ebb_t)); | |
5445 | ebb->sec = sec; | |
5446 | ebb->contents = contents; | |
5447 | ebb->content_length = content_length; | |
5448 | ebb->ptbl = prop_table; | |
5449 | ebb->pte_count = ptblsize; | |
5450 | ebb->relocs = internal_relocs; | |
5451 | ebb->reloc_count = reloc_count; | |
5452 | ebb->start_offset = 0; | |
5453 | ebb->end_offset = ebb->content_length - 1; | |
5454 | ebb->start_ptbl_idx = 0; | |
5455 | ebb->end_ptbl_idx = ptblsize; | |
5456 | ebb->start_reloc_idx = 0; | |
5457 | ebb->end_reloc_idx = reloc_count; | |
5458 | } | |
5459 | ||
5460 | ||
5461 | /* Extend the ebb to all decodable contiguous sections. The algorithm | |
5462 | for building a basic block around an instruction is to push it | |
5463 | forward until we hit the end of a section, an unreachable block or | |
5464 | a block that cannot be transformed. Then we push it backwards | |
5465 | searching for similar conditions. */ | |
5466 | ||
7fa3d080 BW |
5467 | static bfd_boolean extend_ebb_bounds_forward (ebb_t *); |
5468 | static bfd_boolean extend_ebb_bounds_backward (ebb_t *); | |
5469 | static bfd_size_type insn_block_decodable_len | |
5470 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type); | |
5471 | ||
43cd72b9 | 5472 | static bfd_boolean |
7fa3d080 | 5473 | extend_ebb_bounds (ebb_t *ebb) |
43cd72b9 BW |
5474 | { |
5475 | if (!extend_ebb_bounds_forward (ebb)) | |
5476 | return FALSE; | |
5477 | if (!extend_ebb_bounds_backward (ebb)) | |
5478 | return FALSE; | |
5479 | return TRUE; | |
5480 | } | |
5481 | ||
5482 | ||
5483 | static bfd_boolean | |
7fa3d080 | 5484 | extend_ebb_bounds_forward (ebb_t *ebb) |
43cd72b9 BW |
5485 | { |
5486 | property_table_entry *the_entry, *new_entry; | |
5487 | ||
5488 | the_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
5489 | ||
5490 | /* Stop when (1) we cannot decode an instruction, (2) we are at | |
5491 | the end of the property tables, (3) we hit a non-contiguous property | |
5492 | table entry, (4) we hit a NO_TRANSFORM region. */ | |
5493 | ||
5494 | while (1) | |
5495 | { | |
5496 | bfd_vma entry_end; | |
5497 | bfd_size_type insn_block_len; | |
5498 | ||
5499 | entry_end = the_entry->address - ebb->sec->vma + the_entry->size; | |
5500 | insn_block_len = | |
5501 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
5502 | ebb->end_offset, | |
5503 | entry_end - ebb->end_offset); | |
5504 | if (insn_block_len != (entry_end - ebb->end_offset)) | |
5505 | { | |
5506 | (*_bfd_error_handler) | |
5507 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
5508 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
5509 | return FALSE; | |
5510 | } | |
5511 | ebb->end_offset += insn_block_len; | |
5512 | ||
5513 | if (ebb->end_offset == ebb->sec->size) | |
5514 | ebb->ends_section = TRUE; | |
5515 | ||
5516 | /* Update the reloc counter. */ | |
5517 | while (ebb->end_reloc_idx + 1 < ebb->reloc_count | |
5518 | && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset | |
5519 | < ebb->end_offset)) | |
5520 | { | |
5521 | ebb->end_reloc_idx++; | |
5522 | } | |
5523 | ||
5524 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
5525 | return TRUE; | |
5526 | ||
5527 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
5528 | if (((new_entry->flags & XTENSA_PROP_INSN) == 0) | |
5529 | || ((new_entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM) != 0) | |
5530 | || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0)) | |
5531 | break; | |
5532 | ||
5533 | if (the_entry->address + the_entry->size != new_entry->address) | |
5534 | break; | |
5535 | ||
5536 | the_entry = new_entry; | |
5537 | ebb->end_ptbl_idx++; | |
5538 | } | |
5539 | ||
5540 | /* Quick check for an unreachable or end of file just at the end. */ | |
5541 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
5542 | { | |
5543 | if (ebb->end_offset == ebb->content_length) | |
5544 | ebb->ends_section = TRUE; | |
5545 | } | |
5546 | else | |
5547 | { | |
5548 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
5549 | if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0 | |
5550 | && the_entry->address + the_entry->size == new_entry->address) | |
5551 | ebb->ends_unreachable = new_entry; | |
5552 | } | |
5553 | ||
5554 | /* Any other ending requires exact alignment. */ | |
5555 | return TRUE; | |
5556 | } | |
5557 | ||
5558 | ||
5559 | static bfd_boolean | |
7fa3d080 | 5560 | extend_ebb_bounds_backward (ebb_t *ebb) |
43cd72b9 BW |
5561 | { |
5562 | property_table_entry *the_entry, *new_entry; | |
5563 | ||
5564 | the_entry = &ebb->ptbl[ebb->start_ptbl_idx]; | |
5565 | ||
5566 | /* Stop when (1) we cannot decode the instructions in the current entry. | |
5567 | (2) we are at the beginning of the property tables, (3) we hit a | |
5568 | non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */ | |
5569 | ||
5570 | while (1) | |
5571 | { | |
5572 | bfd_vma block_begin; | |
5573 | bfd_size_type insn_block_len; | |
5574 | ||
5575 | block_begin = the_entry->address - ebb->sec->vma; | |
5576 | insn_block_len = | |
5577 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
5578 | block_begin, | |
5579 | ebb->start_offset - block_begin); | |
5580 | if (insn_block_len != ebb->start_offset - block_begin) | |
5581 | { | |
5582 | (*_bfd_error_handler) | |
5583 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
5584 | ebb->sec->owner, ebb->sec, ebb->end_offset + insn_block_len); | |
5585 | return FALSE; | |
5586 | } | |
5587 | ebb->start_offset -= insn_block_len; | |
5588 | ||
5589 | /* Update the reloc counter. */ | |
5590 | while (ebb->start_reloc_idx > 0 | |
5591 | && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset | |
5592 | >= ebb->start_offset)) | |
5593 | { | |
5594 | ebb->start_reloc_idx--; | |
5595 | } | |
5596 | ||
5597 | if (ebb->start_ptbl_idx == 0) | |
5598 | return TRUE; | |
5599 | ||
5600 | new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1]; | |
5601 | if ((new_entry->flags & XTENSA_PROP_INSN) == 0 | |
5602 | || ((new_entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM) != 0) | |
5603 | || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0)) | |
5604 | return TRUE; | |
5605 | if (new_entry->address + new_entry->size != the_entry->address) | |
5606 | return TRUE; | |
5607 | ||
5608 | the_entry = new_entry; | |
5609 | ebb->start_ptbl_idx--; | |
5610 | } | |
5611 | return TRUE; | |
5612 | } | |
5613 | ||
5614 | ||
5615 | static bfd_size_type | |
7fa3d080 BW |
5616 | insn_block_decodable_len (bfd_byte *contents, |
5617 | bfd_size_type content_len, | |
5618 | bfd_vma block_offset, | |
5619 | bfd_size_type block_len) | |
43cd72b9 BW |
5620 | { |
5621 | bfd_vma offset = block_offset; | |
5622 | ||
5623 | while (offset < block_offset + block_len) | |
5624 | { | |
5625 | bfd_size_type insn_len = 0; | |
5626 | ||
5627 | insn_len = insn_decode_len (contents, content_len, offset); | |
5628 | if (insn_len == 0) | |
5629 | return (offset - block_offset); | |
5630 | offset += insn_len; | |
5631 | } | |
5632 | return (offset - block_offset); | |
5633 | } | |
5634 | ||
5635 | ||
5636 | static void | |
7fa3d080 | 5637 | ebb_propose_action (ebb_constraint *c, |
7fa3d080 | 5638 | enum ebb_target_enum align_type, |
288f74fa | 5639 | bfd_vma alignment_pow, |
7fa3d080 BW |
5640 | text_action_t action, |
5641 | bfd_vma offset, | |
5642 | int removed_bytes, | |
5643 | bfd_boolean do_action) | |
43cd72b9 | 5644 | { |
b08b5071 | 5645 | proposed_action *act; |
43cd72b9 | 5646 | |
43cd72b9 BW |
5647 | if (c->action_allocated <= c->action_count) |
5648 | { | |
b08b5071 | 5649 | unsigned new_allocated, i; |
823fc61f | 5650 | proposed_action *new_actions; |
b08b5071 BW |
5651 | |
5652 | new_allocated = (c->action_count + 2) * 2; | |
823fc61f | 5653 | new_actions = (proposed_action *) |
43cd72b9 BW |
5654 | bfd_zmalloc (sizeof (proposed_action) * new_allocated); |
5655 | ||
5656 | for (i = 0; i < c->action_count; i++) | |
5657 | new_actions[i] = c->actions[i]; | |
7fa3d080 | 5658 | if (c->actions) |
43cd72b9 BW |
5659 | free (c->actions); |
5660 | c->actions = new_actions; | |
5661 | c->action_allocated = new_allocated; | |
5662 | } | |
b08b5071 BW |
5663 | |
5664 | act = &c->actions[c->action_count]; | |
5665 | act->align_type = align_type; | |
5666 | act->alignment_pow = alignment_pow; | |
5667 | act->action = action; | |
5668 | act->offset = offset; | |
5669 | act->removed_bytes = removed_bytes; | |
5670 | act->do_action = do_action; | |
5671 | ||
43cd72b9 BW |
5672 | c->action_count++; |
5673 | } | |
5674 | ||
5675 | \f | |
5676 | /* Access to internal relocations, section contents and symbols. */ | |
5677 | ||
5678 | /* During relaxation, we need to modify relocations, section contents, | |
5679 | and symbol definitions, and we need to keep the original values from | |
5680 | being reloaded from the input files, i.e., we need to "pin" the | |
5681 | modified values in memory. We also want to continue to observe the | |
5682 | setting of the "keep-memory" flag. The following functions wrap the | |
5683 | standard BFD functions to take care of this for us. */ | |
5684 | ||
5685 | static Elf_Internal_Rela * | |
7fa3d080 | 5686 | retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
5687 | { |
5688 | Elf_Internal_Rela *internal_relocs; | |
5689 | ||
5690 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
5691 | return NULL; | |
5692 | ||
5693 | internal_relocs = elf_section_data (sec)->relocs; | |
5694 | if (internal_relocs == NULL) | |
5695 | internal_relocs = (_bfd_elf_link_read_relocs | |
7fa3d080 | 5696 | (abfd, sec, NULL, NULL, keep_memory)); |
43cd72b9 BW |
5697 | return internal_relocs; |
5698 | } | |
5699 | ||
5700 | ||
5701 | static void | |
7fa3d080 | 5702 | pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
5703 | { |
5704 | elf_section_data (sec)->relocs = internal_relocs; | |
5705 | } | |
5706 | ||
5707 | ||
5708 | static void | |
7fa3d080 | 5709 | release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
5710 | { |
5711 | if (internal_relocs | |
5712 | && elf_section_data (sec)->relocs != internal_relocs) | |
5713 | free (internal_relocs); | |
5714 | } | |
5715 | ||
5716 | ||
5717 | static bfd_byte * | |
7fa3d080 | 5718 | retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
5719 | { |
5720 | bfd_byte *contents; | |
5721 | bfd_size_type sec_size; | |
5722 | ||
5723 | sec_size = bfd_get_section_limit (abfd, sec); | |
5724 | contents = elf_section_data (sec)->this_hdr.contents; | |
5725 | ||
5726 | if (contents == NULL && sec_size != 0) | |
5727 | { | |
5728 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
5729 | { | |
7fa3d080 | 5730 | if (contents) |
43cd72b9 BW |
5731 | free (contents); |
5732 | return NULL; | |
5733 | } | |
5734 | if (keep_memory) | |
5735 | elf_section_data (sec)->this_hdr.contents = contents; | |
5736 | } | |
5737 | return contents; | |
5738 | } | |
5739 | ||
5740 | ||
5741 | static void | |
7fa3d080 | 5742 | pin_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
5743 | { |
5744 | elf_section_data (sec)->this_hdr.contents = contents; | |
5745 | } | |
5746 | ||
5747 | ||
5748 | static void | |
7fa3d080 | 5749 | release_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
5750 | { |
5751 | if (contents && elf_section_data (sec)->this_hdr.contents != contents) | |
5752 | free (contents); | |
5753 | } | |
5754 | ||
5755 | ||
5756 | static Elf_Internal_Sym * | |
7fa3d080 | 5757 | retrieve_local_syms (bfd *input_bfd) |
43cd72b9 BW |
5758 | { |
5759 | Elf_Internal_Shdr *symtab_hdr; | |
5760 | Elf_Internal_Sym *isymbuf; | |
5761 | size_t locsymcount; | |
5762 | ||
5763 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
5764 | locsymcount = symtab_hdr->sh_info; | |
5765 | ||
5766 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
5767 | if (isymbuf == NULL && locsymcount != 0) | |
5768 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
5769 | NULL, NULL, NULL); | |
5770 | ||
5771 | /* Save the symbols for this input file so they won't be read again. */ | |
5772 | if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents) | |
5773 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
5774 | ||
5775 | return isymbuf; | |
5776 | } | |
5777 | ||
5778 | \f | |
5779 | /* Code for link-time relaxation. */ | |
5780 | ||
5781 | /* Initialization for relaxation: */ | |
7fa3d080 | 5782 | static bfd_boolean analyze_relocations (struct bfd_link_info *); |
43cd72b9 | 5783 | static bfd_boolean find_relaxable_sections |
7fa3d080 | 5784 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
43cd72b9 | 5785 | static bfd_boolean collect_source_relocs |
7fa3d080 | 5786 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 | 5787 | static bfd_boolean is_resolvable_asm_expansion |
7fa3d080 BW |
5788 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *, |
5789 | bfd_boolean *); | |
43cd72b9 | 5790 | static Elf_Internal_Rela *find_associated_l32r_irel |
7fa3d080 | 5791 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *); |
43cd72b9 | 5792 | static bfd_boolean compute_text_actions |
7fa3d080 BW |
5793 | (bfd *, asection *, struct bfd_link_info *); |
5794 | static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *); | |
5795 | static bfd_boolean compute_ebb_actions (ebb_constraint *); | |
43cd72b9 | 5796 | static bfd_boolean check_section_ebb_pcrels_fit |
cb337148 BW |
5797 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, const ebb_constraint *, |
5798 | const xtensa_opcode *); | |
7fa3d080 | 5799 | static bfd_boolean check_section_ebb_reduces (const ebb_constraint *); |
43cd72b9 | 5800 | static void text_action_add_proposed |
7fa3d080 BW |
5801 | (text_action_list *, const ebb_constraint *, asection *); |
5802 | static int compute_fill_extra_space (property_table_entry *); | |
43cd72b9 BW |
5803 | |
5804 | /* First pass: */ | |
5805 | static bfd_boolean compute_removed_literals | |
7fa3d080 | 5806 | (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *); |
43cd72b9 | 5807 | static Elf_Internal_Rela *get_irel_at_offset |
7fa3d080 | 5808 | (asection *, Elf_Internal_Rela *, bfd_vma); |
43cd72b9 | 5809 | static bfd_boolean is_removable_literal |
7fa3d080 | 5810 | (const source_reloc *, int, const source_reloc *, int); |
43cd72b9 | 5811 | static bfd_boolean remove_dead_literal |
7fa3d080 BW |
5812 | (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
5813 | Elf_Internal_Rela *, source_reloc *, property_table_entry *, int); | |
5814 | static bfd_boolean identify_literal_placement | |
5815 | (bfd *, asection *, bfd_byte *, struct bfd_link_info *, | |
5816 | value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int, | |
5817 | source_reloc *, property_table_entry *, int, section_cache_t *, | |
5818 | bfd_boolean); | |
5819 | static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *); | |
43cd72b9 | 5820 | static bfd_boolean coalesce_shared_literal |
7fa3d080 | 5821 | (asection *, source_reloc *, property_table_entry *, int, value_map *); |
43cd72b9 | 5822 | static bfd_boolean move_shared_literal |
7fa3d080 BW |
5823 | (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *, |
5824 | int, const r_reloc *, const literal_value *, section_cache_t *); | |
43cd72b9 BW |
5825 | |
5826 | /* Second pass: */ | |
7fa3d080 BW |
5827 | static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *); |
5828 | static bfd_boolean translate_section_fixes (asection *); | |
5829 | static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *); | |
5830 | static void translate_reloc (const r_reloc *, r_reloc *); | |
43cd72b9 | 5831 | static void shrink_dynamic_reloc_sections |
7fa3d080 | 5832 | (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *); |
43cd72b9 | 5833 | static bfd_boolean move_literal |
7fa3d080 BW |
5834 | (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *, |
5835 | xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *); | |
43cd72b9 | 5836 | static bfd_boolean relax_property_section |
7fa3d080 | 5837 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 BW |
5838 | |
5839 | /* Third pass: */ | |
7fa3d080 | 5840 | static bfd_boolean relax_section_symbols (bfd *, asection *); |
43cd72b9 BW |
5841 | |
5842 | ||
5843 | static bfd_boolean | |
7fa3d080 BW |
5844 | elf_xtensa_relax_section (bfd *abfd, |
5845 | asection *sec, | |
5846 | struct bfd_link_info *link_info, | |
5847 | bfd_boolean *again) | |
43cd72b9 BW |
5848 | { |
5849 | static value_map_hash_table *values = NULL; | |
5850 | static bfd_boolean relocations_analyzed = FALSE; | |
5851 | xtensa_relax_info *relax_info; | |
5852 | ||
5853 | if (!relocations_analyzed) | |
5854 | { | |
5855 | /* Do some overall initialization for relaxation. */ | |
5856 | values = value_map_hash_table_init (); | |
5857 | if (values == NULL) | |
5858 | return FALSE; | |
5859 | relaxing_section = TRUE; | |
5860 | if (!analyze_relocations (link_info)) | |
5861 | return FALSE; | |
5862 | relocations_analyzed = TRUE; | |
5863 | } | |
5864 | *again = FALSE; | |
5865 | ||
5866 | /* Don't mess with linker-created sections. */ | |
5867 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
5868 | return TRUE; | |
5869 | ||
5870 | relax_info = get_xtensa_relax_info (sec); | |
5871 | BFD_ASSERT (relax_info != NULL); | |
5872 | ||
5873 | switch (relax_info->visited) | |
5874 | { | |
5875 | case 0: | |
5876 | /* Note: It would be nice to fold this pass into | |
5877 | analyze_relocations, but it is important for this step that the | |
5878 | sections be examined in link order. */ | |
5879 | if (!compute_removed_literals (abfd, sec, link_info, values)) | |
5880 | return FALSE; | |
5881 | *again = TRUE; | |
5882 | break; | |
5883 | ||
5884 | case 1: | |
5885 | if (values) | |
5886 | value_map_hash_table_delete (values); | |
5887 | values = NULL; | |
5888 | if (!relax_section (abfd, sec, link_info)) | |
5889 | return FALSE; | |
5890 | *again = TRUE; | |
5891 | break; | |
5892 | ||
5893 | case 2: | |
5894 | if (!relax_section_symbols (abfd, sec)) | |
5895 | return FALSE; | |
5896 | break; | |
5897 | } | |
5898 | ||
5899 | relax_info->visited++; | |
5900 | return TRUE; | |
5901 | } | |
5902 | ||
5903 | \f | |
5904 | /* Initialization for relaxation. */ | |
5905 | ||
5906 | /* This function is called once at the start of relaxation. It scans | |
5907 | all the input sections and marks the ones that are relaxable (i.e., | |
5908 | literal sections with L32R relocations against them), and then | |
5909 | collects source_reloc information for all the relocations against | |
5910 | those relaxable sections. During this process, it also detects | |
5911 | longcalls, i.e., calls relaxed by the assembler into indirect | |
5912 | calls, that can be optimized back into direct calls. Within each | |
5913 | extended basic block (ebb) containing an optimized longcall, it | |
5914 | computes a set of "text actions" that can be performed to remove | |
5915 | the L32R associated with the longcall while optionally preserving | |
5916 | branch target alignments. */ | |
5917 | ||
5918 | static bfd_boolean | |
7fa3d080 | 5919 | analyze_relocations (struct bfd_link_info *link_info) |
43cd72b9 BW |
5920 | { |
5921 | bfd *abfd; | |
5922 | asection *sec; | |
5923 | bfd_boolean is_relaxable = FALSE; | |
5924 | ||
5925 | /* Initialize the per-section relaxation info. */ | |
5926 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5927 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5928 | { | |
5929 | init_xtensa_relax_info (sec); | |
5930 | } | |
5931 | ||
5932 | /* Mark relaxable sections (and count relocations against each one). */ | |
5933 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5934 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5935 | { | |
5936 | if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable)) | |
5937 | return FALSE; | |
5938 | } | |
5939 | ||
5940 | /* Bail out if there are no relaxable sections. */ | |
5941 | if (!is_relaxable) | |
5942 | return TRUE; | |
5943 | ||
5944 | /* Allocate space for source_relocs. */ | |
5945 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5946 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5947 | { | |
5948 | xtensa_relax_info *relax_info; | |
5949 | ||
5950 | relax_info = get_xtensa_relax_info (sec); | |
5951 | if (relax_info->is_relaxable_literal_section | |
5952 | || relax_info->is_relaxable_asm_section) | |
5953 | { | |
5954 | relax_info->src_relocs = (source_reloc *) | |
5955 | bfd_malloc (relax_info->src_count * sizeof (source_reloc)); | |
5956 | } | |
25c6282a BW |
5957 | else |
5958 | relax_info->src_count = 0; | |
43cd72b9 BW |
5959 | } |
5960 | ||
5961 | /* Collect info on relocations against each relaxable section. */ | |
5962 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5963 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5964 | { | |
5965 | if (!collect_source_relocs (abfd, sec, link_info)) | |
5966 | return FALSE; | |
5967 | } | |
5968 | ||
5969 | /* Compute the text actions. */ | |
5970 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link_next) | |
5971 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
5972 | { | |
5973 | if (!compute_text_actions (abfd, sec, link_info)) | |
5974 | return FALSE; | |
5975 | } | |
5976 | ||
5977 | return TRUE; | |
5978 | } | |
5979 | ||
5980 | ||
5981 | /* Find all the sections that might be relaxed. The motivation for | |
5982 | this pass is that collect_source_relocs() needs to record _all_ the | |
5983 | relocations that target each relaxable section. That is expensive | |
5984 | and unnecessary unless the target section is actually going to be | |
5985 | relaxed. This pass identifies all such sections by checking if | |
5986 | they have L32Rs pointing to them. In the process, the total number | |
5987 | of relocations targeting each section is also counted so that we | |
5988 | know how much space to allocate for source_relocs against each | |
5989 | relaxable literal section. */ | |
5990 | ||
5991 | static bfd_boolean | |
7fa3d080 BW |
5992 | find_relaxable_sections (bfd *abfd, |
5993 | asection *sec, | |
5994 | struct bfd_link_info *link_info, | |
5995 | bfd_boolean *is_relaxable_p) | |
43cd72b9 BW |
5996 | { |
5997 | Elf_Internal_Rela *internal_relocs; | |
5998 | bfd_byte *contents; | |
5999 | bfd_boolean ok = TRUE; | |
6000 | unsigned i; | |
6001 | xtensa_relax_info *source_relax_info; | |
25c6282a | 6002 | bfd_boolean is_l32r_reloc; |
43cd72b9 BW |
6003 | |
6004 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6005 | link_info->keep_memory); | |
6006 | if (internal_relocs == NULL) | |
6007 | return ok; | |
6008 | ||
6009 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6010 | if (contents == NULL && sec->size != 0) | |
6011 | { | |
6012 | ok = FALSE; | |
6013 | goto error_return; | |
6014 | } | |
6015 | ||
6016 | source_relax_info = get_xtensa_relax_info (sec); | |
6017 | for (i = 0; i < sec->reloc_count; i++) | |
6018 | { | |
6019 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6020 | r_reloc r_rel; | |
6021 | asection *target_sec; | |
6022 | xtensa_relax_info *target_relax_info; | |
6023 | ||
6024 | /* If this section has not already been marked as "relaxable", and | |
6025 | if it contains any ASM_EXPAND relocations (marking expanded | |
6026 | longcalls) that can be optimized into direct calls, then mark | |
6027 | the section as "relaxable". */ | |
6028 | if (source_relax_info | |
6029 | && !source_relax_info->is_relaxable_asm_section | |
6030 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND) | |
6031 | { | |
6032 | bfd_boolean is_reachable = FALSE; | |
6033 | if (is_resolvable_asm_expansion (abfd, sec, contents, irel, | |
6034 | link_info, &is_reachable) | |
6035 | && is_reachable) | |
6036 | { | |
6037 | source_relax_info->is_relaxable_asm_section = TRUE; | |
6038 | *is_relaxable_p = TRUE; | |
6039 | } | |
6040 | } | |
6041 | ||
6042 | r_reloc_init (&r_rel, abfd, irel, contents, | |
6043 | bfd_get_section_limit (abfd, sec)); | |
6044 | ||
6045 | target_sec = r_reloc_get_section (&r_rel); | |
6046 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6047 | if (!target_relax_info) | |
6048 | continue; | |
6049 | ||
6050 | /* Count PC-relative operand relocations against the target section. | |
6051 | Note: The conditions tested here must match the conditions under | |
6052 | which init_source_reloc is called in collect_source_relocs(). */ | |
25c6282a BW |
6053 | is_l32r_reloc = FALSE; |
6054 | if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6055 | { | |
6056 | xtensa_opcode opcode = | |
6057 | get_relocation_opcode (abfd, sec, contents, irel); | |
6058 | if (opcode != XTENSA_UNDEFINED) | |
6059 | { | |
6060 | is_l32r_reloc = (opcode == get_l32r_opcode ()); | |
6061 | if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info)) | |
6062 | || is_l32r_reloc) | |
6063 | target_relax_info->src_count++; | |
6064 | } | |
6065 | } | |
43cd72b9 | 6066 | |
25c6282a | 6067 | if (is_l32r_reloc && r_reloc_is_defined (&r_rel)) |
43cd72b9 BW |
6068 | { |
6069 | /* Mark the target section as relaxable. */ | |
6070 | target_relax_info->is_relaxable_literal_section = TRUE; | |
6071 | *is_relaxable_p = TRUE; | |
6072 | } | |
6073 | } | |
6074 | ||
6075 | error_return: | |
6076 | release_contents (sec, contents); | |
6077 | release_internal_relocs (sec, internal_relocs); | |
6078 | return ok; | |
6079 | } | |
6080 | ||
6081 | ||
6082 | /* Record _all_ the relocations that point to relaxable sections, and | |
6083 | get rid of ASM_EXPAND relocs by either converting them to | |
6084 | ASM_SIMPLIFY or by removing them. */ | |
6085 | ||
6086 | static bfd_boolean | |
7fa3d080 BW |
6087 | collect_source_relocs (bfd *abfd, |
6088 | asection *sec, | |
6089 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6090 | { |
6091 | Elf_Internal_Rela *internal_relocs; | |
6092 | bfd_byte *contents; | |
6093 | bfd_boolean ok = TRUE; | |
6094 | unsigned i; | |
6095 | bfd_size_type sec_size; | |
6096 | ||
6097 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6098 | link_info->keep_memory); | |
6099 | if (internal_relocs == NULL) | |
6100 | return ok; | |
6101 | ||
6102 | sec_size = bfd_get_section_limit (abfd, sec); | |
6103 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6104 | if (contents == NULL && sec_size != 0) | |
6105 | { | |
6106 | ok = FALSE; | |
6107 | goto error_return; | |
6108 | } | |
6109 | ||
6110 | /* Record relocations against relaxable literal sections. */ | |
6111 | for (i = 0; i < sec->reloc_count; i++) | |
6112 | { | |
6113 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6114 | r_reloc r_rel; | |
6115 | asection *target_sec; | |
6116 | xtensa_relax_info *target_relax_info; | |
6117 | ||
6118 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6119 | ||
6120 | target_sec = r_reloc_get_section (&r_rel); | |
6121 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6122 | ||
6123 | if (target_relax_info | |
6124 | && (target_relax_info->is_relaxable_literal_section | |
6125 | || target_relax_info->is_relaxable_asm_section)) | |
6126 | { | |
6127 | xtensa_opcode opcode = XTENSA_UNDEFINED; | |
6128 | int opnd = -1; | |
6129 | bfd_boolean is_abs_literal = FALSE; | |
6130 | ||
6131 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
6132 | { | |
6133 | /* None of the current alternate relocs are PC-relative, | |
6134 | and only PC-relative relocs matter here. However, we | |
6135 | still need to record the opcode for literal | |
6136 | coalescing. */ | |
6137 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6138 | if (opcode == get_l32r_opcode ()) | |
6139 | { | |
6140 | is_abs_literal = TRUE; | |
6141 | opnd = 1; | |
6142 | } | |
6143 | else | |
6144 | opcode = XTENSA_UNDEFINED; | |
6145 | } | |
6146 | else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6147 | { | |
6148 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
6149 | opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
6150 | } | |
6151 | ||
6152 | if (opcode != XTENSA_UNDEFINED) | |
6153 | { | |
6154 | int src_next = target_relax_info->src_next++; | |
6155 | source_reloc *s_reloc = &target_relax_info->src_relocs[src_next]; | |
6156 | ||
6157 | init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd, | |
6158 | is_abs_literal); | |
6159 | } | |
6160 | } | |
6161 | } | |
6162 | ||
6163 | /* Now get rid of ASM_EXPAND relocations. At this point, the | |
6164 | src_relocs array for the target literal section may still be | |
6165 | incomplete, but it must at least contain the entries for the L32R | |
6166 | relocations associated with ASM_EXPANDs because they were just | |
6167 | added in the preceding loop over the relocations. */ | |
6168 | ||
6169 | for (i = 0; i < sec->reloc_count; i++) | |
6170 | { | |
6171 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6172 | bfd_boolean is_reachable; | |
6173 | ||
6174 | if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info, | |
6175 | &is_reachable)) | |
6176 | continue; | |
6177 | ||
6178 | if (is_reachable) | |
6179 | { | |
6180 | Elf_Internal_Rela *l32r_irel; | |
6181 | r_reloc r_rel; | |
6182 | asection *target_sec; | |
6183 | xtensa_relax_info *target_relax_info; | |
6184 | ||
6185 | /* Mark the source_reloc for the L32R so that it will be | |
6186 | removed in compute_removed_literals(), along with the | |
6187 | associated literal. */ | |
6188 | l32r_irel = find_associated_l32r_irel (abfd, sec, contents, | |
6189 | irel, internal_relocs); | |
6190 | if (l32r_irel == NULL) | |
6191 | continue; | |
6192 | ||
6193 | r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size); | |
6194 | ||
6195 | target_sec = r_reloc_get_section (&r_rel); | |
6196 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6197 | ||
6198 | if (target_relax_info | |
6199 | && (target_relax_info->is_relaxable_literal_section | |
6200 | || target_relax_info->is_relaxable_asm_section)) | |
6201 | { | |
6202 | source_reloc *s_reloc; | |
6203 | ||
6204 | /* Search the source_relocs for the entry corresponding to | |
6205 | the l32r_irel. Note: The src_relocs array is not yet | |
6206 | sorted, but it wouldn't matter anyway because we're | |
6207 | searching by source offset instead of target offset. */ | |
6208 | s_reloc = find_source_reloc (target_relax_info->src_relocs, | |
6209 | target_relax_info->src_next, | |
6210 | sec, l32r_irel); | |
6211 | BFD_ASSERT (s_reloc); | |
6212 | s_reloc->is_null = TRUE; | |
6213 | } | |
6214 | ||
6215 | /* Convert this reloc to ASM_SIMPLIFY. */ | |
6216 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
6217 | R_XTENSA_ASM_SIMPLIFY); | |
6218 | l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
6219 | ||
6220 | pin_internal_relocs (sec, internal_relocs); | |
6221 | } | |
6222 | else | |
6223 | { | |
6224 | /* It is resolvable but doesn't reach. We resolve now | |
6225 | by eliminating the relocation -- the call will remain | |
6226 | expanded into L32R/CALLX. */ | |
6227 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
6228 | pin_internal_relocs (sec, internal_relocs); | |
6229 | } | |
6230 | } | |
6231 | ||
6232 | error_return: | |
6233 | release_contents (sec, contents); | |
6234 | release_internal_relocs (sec, internal_relocs); | |
6235 | return ok; | |
6236 | } | |
6237 | ||
6238 | ||
6239 | /* Return TRUE if the asm expansion can be resolved. Generally it can | |
6240 | be resolved on a final link or when a partial link locates it in the | |
6241 | same section as the target. Set "is_reachable" flag if the target of | |
6242 | the call is within the range of a direct call, given the current VMA | |
6243 | for this section and the target section. */ | |
6244 | ||
6245 | bfd_boolean | |
7fa3d080 BW |
6246 | is_resolvable_asm_expansion (bfd *abfd, |
6247 | asection *sec, | |
6248 | bfd_byte *contents, | |
6249 | Elf_Internal_Rela *irel, | |
6250 | struct bfd_link_info *link_info, | |
6251 | bfd_boolean *is_reachable_p) | |
43cd72b9 BW |
6252 | { |
6253 | asection *target_sec; | |
6254 | bfd_vma target_offset; | |
6255 | r_reloc r_rel; | |
6256 | xtensa_opcode opcode, direct_call_opcode; | |
6257 | bfd_vma self_address; | |
6258 | bfd_vma dest_address; | |
6259 | bfd_boolean uses_l32r; | |
6260 | bfd_size_type sec_size; | |
6261 | ||
6262 | *is_reachable_p = FALSE; | |
6263 | ||
6264 | if (contents == NULL) | |
6265 | return FALSE; | |
6266 | ||
6267 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND) | |
6268 | return FALSE; | |
6269 | ||
6270 | sec_size = bfd_get_section_limit (abfd, sec); | |
6271 | opcode = get_expanded_call_opcode (contents + irel->r_offset, | |
6272 | sec_size - irel->r_offset, &uses_l32r); | |
6273 | /* Optimization of longcalls that use CONST16 is not yet implemented. */ | |
6274 | if (!uses_l32r) | |
6275 | return FALSE; | |
6276 | ||
6277 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
6278 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
6279 | return FALSE; | |
6280 | ||
6281 | /* Check and see that the target resolves. */ | |
6282 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
6283 | if (!r_reloc_is_defined (&r_rel)) | |
6284 | return FALSE; | |
6285 | ||
6286 | target_sec = r_reloc_get_section (&r_rel); | |
6287 | target_offset = r_rel.target_offset; | |
6288 | ||
6289 | /* If the target is in a shared library, then it doesn't reach. This | |
6290 | isn't supposed to come up because the compiler should never generate | |
6291 | non-PIC calls on systems that use shared libraries, but the linker | |
6292 | shouldn't crash regardless. */ | |
6293 | if (!target_sec->output_section) | |
6294 | return FALSE; | |
6295 | ||
6296 | /* For relocatable sections, we can only simplify when the output | |
6297 | section of the target is the same as the output section of the | |
6298 | source. */ | |
6299 | if (link_info->relocatable | |
6300 | && (target_sec->output_section != sec->output_section | |
6301 | || is_reloc_sym_weak (abfd, irel))) | |
6302 | return FALSE; | |
6303 | ||
6304 | self_address = (sec->output_section->vma | |
6305 | + sec->output_offset + irel->r_offset + 3); | |
6306 | dest_address = (target_sec->output_section->vma | |
6307 | + target_sec->output_offset + target_offset); | |
6308 | ||
6309 | *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0, | |
6310 | self_address, dest_address); | |
6311 | ||
6312 | if ((self_address >> CALL_SEGMENT_BITS) != | |
6313 | (dest_address >> CALL_SEGMENT_BITS)) | |
6314 | return FALSE; | |
6315 | ||
6316 | return TRUE; | |
6317 | } | |
6318 | ||
6319 | ||
6320 | static Elf_Internal_Rela * | |
7fa3d080 BW |
6321 | find_associated_l32r_irel (bfd *abfd, |
6322 | asection *sec, | |
6323 | bfd_byte *contents, | |
6324 | Elf_Internal_Rela *other_irel, | |
6325 | Elf_Internal_Rela *internal_relocs) | |
43cd72b9 BW |
6326 | { |
6327 | unsigned i; | |
e0001a05 | 6328 | |
43cd72b9 BW |
6329 | for (i = 0; i < sec->reloc_count; i++) |
6330 | { | |
6331 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
e0001a05 | 6332 | |
43cd72b9 BW |
6333 | if (irel == other_irel) |
6334 | continue; | |
6335 | if (irel->r_offset != other_irel->r_offset) | |
6336 | continue; | |
6337 | if (is_l32r_relocation (abfd, sec, contents, irel)) | |
6338 | return irel; | |
6339 | } | |
6340 | ||
6341 | return NULL; | |
e0001a05 NC |
6342 | } |
6343 | ||
6344 | ||
cb337148 BW |
6345 | static xtensa_opcode * |
6346 | build_reloc_opcodes (bfd *abfd, | |
6347 | asection *sec, | |
6348 | bfd_byte *contents, | |
6349 | Elf_Internal_Rela *internal_relocs) | |
6350 | { | |
6351 | unsigned i; | |
6352 | xtensa_opcode *reloc_opcodes = | |
6353 | (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count); | |
6354 | for (i = 0; i < sec->reloc_count; i++) | |
6355 | { | |
6356 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6357 | reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel); | |
6358 | } | |
6359 | return reloc_opcodes; | |
6360 | } | |
6361 | ||
6362 | ||
43cd72b9 BW |
6363 | /* The compute_text_actions function will build a list of potential |
6364 | transformation actions for code in the extended basic block of each | |
6365 | longcall that is optimized to a direct call. From this list we | |
6366 | generate a set of actions to actually perform that optimizes for | |
6367 | space and, if not using size_opt, maintains branch target | |
6368 | alignments. | |
e0001a05 | 6369 | |
43cd72b9 BW |
6370 | These actions to be performed are placed on a per-section list. |
6371 | The actual changes are performed by relax_section() in the second | |
6372 | pass. */ | |
6373 | ||
6374 | bfd_boolean | |
7fa3d080 BW |
6375 | compute_text_actions (bfd *abfd, |
6376 | asection *sec, | |
6377 | struct bfd_link_info *link_info) | |
e0001a05 | 6378 | { |
cb337148 | 6379 | xtensa_opcode *reloc_opcodes = NULL; |
43cd72b9 | 6380 | xtensa_relax_info *relax_info; |
e0001a05 | 6381 | bfd_byte *contents; |
43cd72b9 | 6382 | Elf_Internal_Rela *internal_relocs; |
e0001a05 NC |
6383 | bfd_boolean ok = TRUE; |
6384 | unsigned i; | |
43cd72b9 BW |
6385 | property_table_entry *prop_table = 0; |
6386 | int ptblsize = 0; | |
6387 | bfd_size_type sec_size; | |
43cd72b9 | 6388 | |
43cd72b9 BW |
6389 | relax_info = get_xtensa_relax_info (sec); |
6390 | BFD_ASSERT (relax_info); | |
25c6282a BW |
6391 | BFD_ASSERT (relax_info->src_next == relax_info->src_count); |
6392 | ||
6393 | /* Do nothing if the section contains no optimized longcalls. */ | |
43cd72b9 BW |
6394 | if (!relax_info->is_relaxable_asm_section) |
6395 | return ok; | |
e0001a05 NC |
6396 | |
6397 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6398 | link_info->keep_memory); | |
e0001a05 | 6399 | |
43cd72b9 BW |
6400 | if (internal_relocs) |
6401 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
6402 | internal_reloc_compare); | |
6403 | ||
6404 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 | 6405 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 6406 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
6407 | { |
6408 | ok = FALSE; | |
6409 | goto error_return; | |
6410 | } | |
6411 | ||
43cd72b9 BW |
6412 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
6413 | XTENSA_PROP_SEC_NAME, FALSE); | |
6414 | if (ptblsize < 0) | |
6415 | { | |
6416 | ok = FALSE; | |
6417 | goto error_return; | |
6418 | } | |
6419 | ||
6420 | for (i = 0; i < sec->reloc_count; i++) | |
e0001a05 NC |
6421 | { |
6422 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 BW |
6423 | bfd_vma r_offset; |
6424 | property_table_entry *the_entry; | |
6425 | int ptbl_idx; | |
6426 | ebb_t *ebb; | |
6427 | ebb_constraint ebb_table; | |
6428 | bfd_size_type simplify_size; | |
6429 | ||
6430 | if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY) | |
6431 | continue; | |
6432 | r_offset = irel->r_offset; | |
e0001a05 | 6433 | |
43cd72b9 BW |
6434 | simplify_size = get_asm_simplify_size (contents, sec_size, r_offset); |
6435 | if (simplify_size == 0) | |
6436 | { | |
6437 | (*_bfd_error_handler) | |
6438 | (_("%B(%A+0x%lx): could not decode instruction for XTENSA_ASM_SIMPLIFY relocation; possible configuration mismatch"), | |
6439 | sec->owner, sec, r_offset); | |
6440 | continue; | |
6441 | } | |
e0001a05 | 6442 | |
43cd72b9 BW |
6443 | /* If the instruction table is not around, then don't do this |
6444 | relaxation. */ | |
6445 | the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
6446 | sec->vma + irel->r_offset); | |
6447 | if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL) | |
6448 | { | |
6449 | text_action_add (&relax_info->action_list, | |
6450 | ta_convert_longcall, sec, r_offset, | |
6451 | 0); | |
6452 | continue; | |
6453 | } | |
6454 | ||
6455 | /* If the next longcall happens to be at the same address as an | |
6456 | unreachable section of size 0, then skip forward. */ | |
6457 | ptbl_idx = the_entry - prop_table; | |
6458 | while ((the_entry->flags & XTENSA_PROP_UNREACHABLE) | |
6459 | && the_entry->size == 0 | |
6460 | && ptbl_idx + 1 < ptblsize | |
6461 | && (prop_table[ptbl_idx + 1].address | |
6462 | == prop_table[ptbl_idx].address)) | |
6463 | { | |
6464 | ptbl_idx++; | |
6465 | the_entry++; | |
6466 | } | |
e0001a05 | 6467 | |
43cd72b9 BW |
6468 | if (the_entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM) |
6469 | /* NO_REORDER is OK */ | |
6470 | continue; | |
e0001a05 | 6471 | |
43cd72b9 BW |
6472 | init_ebb_constraint (&ebb_table); |
6473 | ebb = &ebb_table.ebb; | |
6474 | init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize, | |
6475 | internal_relocs, sec->reloc_count); | |
6476 | ebb->start_offset = r_offset + simplify_size; | |
6477 | ebb->end_offset = r_offset + simplify_size; | |
6478 | ebb->start_ptbl_idx = ptbl_idx; | |
6479 | ebb->end_ptbl_idx = ptbl_idx; | |
6480 | ebb->start_reloc_idx = i; | |
6481 | ebb->end_reloc_idx = i; | |
6482 | ||
cb337148 BW |
6483 | /* Precompute the opcode for each relocation. */ |
6484 | if (reloc_opcodes == NULL) | |
6485 | reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, | |
6486 | internal_relocs); | |
6487 | ||
43cd72b9 BW |
6488 | if (!extend_ebb_bounds (ebb) |
6489 | || !compute_ebb_proposed_actions (&ebb_table) | |
6490 | || !compute_ebb_actions (&ebb_table) | |
6491 | || !check_section_ebb_pcrels_fit (abfd, sec, contents, | |
cb337148 BW |
6492 | internal_relocs, &ebb_table, |
6493 | reloc_opcodes) | |
43cd72b9 | 6494 | || !check_section_ebb_reduces (&ebb_table)) |
e0001a05 | 6495 | { |
43cd72b9 BW |
6496 | /* If anything goes wrong or we get unlucky and something does |
6497 | not fit, with our plan because of expansion between | |
6498 | critical branches, just convert to a NOP. */ | |
6499 | ||
6500 | text_action_add (&relax_info->action_list, | |
6501 | ta_convert_longcall, sec, r_offset, 0); | |
6502 | i = ebb_table.ebb.end_reloc_idx; | |
6503 | free_ebb_constraint (&ebb_table); | |
6504 | continue; | |
e0001a05 | 6505 | } |
43cd72b9 BW |
6506 | |
6507 | text_action_add_proposed (&relax_info->action_list, &ebb_table, sec); | |
6508 | ||
6509 | /* Update the index so we do not go looking at the relocations | |
6510 | we have already processed. */ | |
6511 | i = ebb_table.ebb.end_reloc_idx; | |
6512 | free_ebb_constraint (&ebb_table); | |
e0001a05 NC |
6513 | } |
6514 | ||
43cd72b9 | 6515 | #if DEBUG |
7fa3d080 | 6516 | if (relax_info->action_list.head) |
43cd72b9 BW |
6517 | print_action_list (stderr, &relax_info->action_list); |
6518 | #endif | |
6519 | ||
6520 | error_return: | |
e0001a05 NC |
6521 | release_contents (sec, contents); |
6522 | release_internal_relocs (sec, internal_relocs); | |
43cd72b9 BW |
6523 | if (prop_table) |
6524 | free (prop_table); | |
cb337148 BW |
6525 | if (reloc_opcodes) |
6526 | free (reloc_opcodes); | |
43cd72b9 | 6527 | |
e0001a05 NC |
6528 | return ok; |
6529 | } | |
6530 | ||
6531 | ||
64b607e6 BW |
6532 | /* Do not widen an instruction if it is preceeded by a |
6533 | loop opcode. It might cause misalignment. */ | |
6534 | ||
6535 | static bfd_boolean | |
6536 | prev_instr_is_a_loop (bfd_byte *contents, | |
6537 | bfd_size_type content_length, | |
6538 | bfd_size_type offset) | |
6539 | { | |
6540 | xtensa_opcode prev_opcode; | |
6541 | ||
6542 | if (offset < 3) | |
6543 | return FALSE; | |
6544 | prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0); | |
6545 | return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1); | |
6546 | } | |
6547 | ||
6548 | ||
43cd72b9 | 6549 | /* Find all of the possible actions for an extended basic block. */ |
e0001a05 | 6550 | |
43cd72b9 | 6551 | bfd_boolean |
7fa3d080 | 6552 | compute_ebb_proposed_actions (ebb_constraint *ebb_table) |
e0001a05 | 6553 | { |
43cd72b9 BW |
6554 | const ebb_t *ebb = &ebb_table->ebb; |
6555 | unsigned rel_idx = ebb->start_reloc_idx; | |
6556 | property_table_entry *entry, *start_entry, *end_entry; | |
64b607e6 BW |
6557 | bfd_vma offset = 0; |
6558 | xtensa_isa isa = xtensa_default_isa; | |
6559 | xtensa_format fmt; | |
6560 | static xtensa_insnbuf insnbuf = NULL; | |
6561 | static xtensa_insnbuf slotbuf = NULL; | |
6562 | ||
6563 | if (insnbuf == NULL) | |
6564 | { | |
6565 | insnbuf = xtensa_insnbuf_alloc (isa); | |
6566 | slotbuf = xtensa_insnbuf_alloc (isa); | |
6567 | } | |
e0001a05 | 6568 | |
43cd72b9 BW |
6569 | start_entry = &ebb->ptbl[ebb->start_ptbl_idx]; |
6570 | end_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
e0001a05 | 6571 | |
43cd72b9 | 6572 | for (entry = start_entry; entry <= end_entry; entry++) |
e0001a05 | 6573 | { |
64b607e6 | 6574 | bfd_vma start_offset, end_offset; |
43cd72b9 | 6575 | bfd_size_type insn_len; |
e0001a05 | 6576 | |
43cd72b9 BW |
6577 | start_offset = entry->address - ebb->sec->vma; |
6578 | end_offset = entry->address + entry->size - ebb->sec->vma; | |
e0001a05 | 6579 | |
43cd72b9 BW |
6580 | if (entry == start_entry) |
6581 | start_offset = ebb->start_offset; | |
6582 | if (entry == end_entry) | |
6583 | end_offset = ebb->end_offset; | |
6584 | offset = start_offset; | |
e0001a05 | 6585 | |
43cd72b9 BW |
6586 | if (offset == entry->address - ebb->sec->vma |
6587 | && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0) | |
6588 | { | |
6589 | enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN; | |
6590 | BFD_ASSERT (offset != end_offset); | |
6591 | if (offset == end_offset) | |
6592 | return FALSE; | |
e0001a05 | 6593 | |
43cd72b9 BW |
6594 | insn_len = insn_decode_len (ebb->contents, ebb->content_length, |
6595 | offset); | |
43cd72b9 | 6596 | if (insn_len == 0) |
64b607e6 BW |
6597 | goto decode_error; |
6598 | ||
43cd72b9 BW |
6599 | if (check_branch_target_aligned_address (offset, insn_len)) |
6600 | align_type = EBB_REQUIRE_TGT_ALIGN; | |
6601 | ||
6602 | ebb_propose_action (ebb_table, align_type, 0, | |
6603 | ta_none, offset, 0, TRUE); | |
6604 | } | |
6605 | ||
6606 | while (offset != end_offset) | |
e0001a05 | 6607 | { |
43cd72b9 | 6608 | Elf_Internal_Rela *irel; |
e0001a05 | 6609 | xtensa_opcode opcode; |
e0001a05 | 6610 | |
43cd72b9 BW |
6611 | while (rel_idx < ebb->end_reloc_idx |
6612 | && (ebb->relocs[rel_idx].r_offset < offset | |
6613 | || (ebb->relocs[rel_idx].r_offset == offset | |
6614 | && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info) | |
6615 | != R_XTENSA_ASM_SIMPLIFY)))) | |
6616 | rel_idx++; | |
6617 | ||
6618 | /* Check for longcall. */ | |
6619 | irel = &ebb->relocs[rel_idx]; | |
6620 | if (irel->r_offset == offset | |
6621 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY) | |
6622 | { | |
6623 | bfd_size_type simplify_size; | |
e0001a05 | 6624 | |
43cd72b9 BW |
6625 | simplify_size = get_asm_simplify_size (ebb->contents, |
6626 | ebb->content_length, | |
6627 | irel->r_offset); | |
6628 | if (simplify_size == 0) | |
64b607e6 | 6629 | goto decode_error; |
43cd72b9 BW |
6630 | |
6631 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6632 | ta_convert_longcall, offset, 0, TRUE); | |
6633 | ||
6634 | offset += simplify_size; | |
6635 | continue; | |
6636 | } | |
e0001a05 | 6637 | |
64b607e6 BW |
6638 | if (offset + MIN_INSN_LENGTH > ebb->content_length) |
6639 | goto decode_error; | |
6640 | xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset], | |
6641 | ebb->content_length - offset); | |
6642 | fmt = xtensa_format_decode (isa, insnbuf); | |
6643 | if (fmt == XTENSA_UNDEFINED) | |
6644 | goto decode_error; | |
6645 | insn_len = xtensa_format_length (isa, fmt); | |
6646 | if (insn_len == (bfd_size_type) XTENSA_UNDEFINED) | |
6647 | goto decode_error; | |
6648 | ||
6649 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
43cd72b9 | 6650 | { |
64b607e6 BW |
6651 | offset += insn_len; |
6652 | continue; | |
43cd72b9 | 6653 | } |
64b607e6 BW |
6654 | |
6655 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
6656 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
6657 | if (opcode == XTENSA_UNDEFINED) | |
6658 | goto decode_error; | |
6659 | ||
43cd72b9 BW |
6660 | if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0 |
6661 | && (entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM) == 0 | |
64b607e6 | 6662 | && can_narrow_instruction (slotbuf, fmt, opcode) != 0) |
43cd72b9 BW |
6663 | { |
6664 | /* Add an instruction narrow action. */ | |
6665 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6666 | ta_narrow_insn, offset, 0, FALSE); | |
43cd72b9 | 6667 | } |
64b607e6 BW |
6668 | else if ((entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM) == 0 |
6669 | && can_widen_instruction (slotbuf, fmt, opcode) != 0 | |
6670 | && ! prev_instr_is_a_loop (ebb->contents, | |
6671 | ebb->content_length, offset)) | |
43cd72b9 BW |
6672 | { |
6673 | /* Add an instruction widen action. */ | |
6674 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6675 | ta_widen_insn, offset, 0, FALSE); | |
43cd72b9 | 6676 | } |
64b607e6 | 6677 | else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1) |
43cd72b9 BW |
6678 | { |
6679 | /* Check for branch targets. */ | |
6680 | ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0, | |
6681 | ta_none, offset, 0, TRUE); | |
43cd72b9 BW |
6682 | } |
6683 | ||
6684 | offset += insn_len; | |
e0001a05 NC |
6685 | } |
6686 | } | |
6687 | ||
43cd72b9 BW |
6688 | if (ebb->ends_unreachable) |
6689 | { | |
6690 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
6691 | ta_fill, ebb->end_offset, 0, TRUE); | |
6692 | } | |
e0001a05 | 6693 | |
43cd72b9 | 6694 | return TRUE; |
64b607e6 BW |
6695 | |
6696 | decode_error: | |
6697 | (*_bfd_error_handler) | |
6698 | (_("%B(%A+0x%lx): could not decode instruction; possible configuration mismatch"), | |
6699 | ebb->sec->owner, ebb->sec, offset); | |
6700 | return FALSE; | |
43cd72b9 BW |
6701 | } |
6702 | ||
6703 | ||
6704 | /* After all of the information has collected about the | |
6705 | transformations possible in an EBB, compute the appropriate actions | |
6706 | here in compute_ebb_actions. We still must check later to make | |
6707 | sure that the actions do not break any relocations. The algorithm | |
6708 | used here is pretty greedy. Basically, it removes as many no-ops | |
6709 | as possible so that the end of the EBB has the same alignment | |
6710 | characteristics as the original. First, it uses narrowing, then | |
6711 | fill space at the end of the EBB, and finally widenings. If that | |
6712 | does not work, it tries again with one fewer no-op removed. The | |
6713 | optimization will only be performed if all of the branch targets | |
6714 | that were aligned before transformation are also aligned after the | |
6715 | transformation. | |
6716 | ||
6717 | When the size_opt flag is set, ignore the branch target alignments, | |
6718 | narrow all wide instructions, and remove all no-ops unless the end | |
6719 | of the EBB prevents it. */ | |
6720 | ||
6721 | bfd_boolean | |
7fa3d080 | 6722 | compute_ebb_actions (ebb_constraint *ebb_table) |
43cd72b9 BW |
6723 | { |
6724 | unsigned i = 0; | |
6725 | unsigned j; | |
6726 | int removed_bytes = 0; | |
6727 | ebb_t *ebb = &ebb_table->ebb; | |
6728 | unsigned seg_idx_start = 0; | |
6729 | unsigned seg_idx_end = 0; | |
6730 | ||
6731 | /* We perform this like the assembler relaxation algorithm: Start by | |
6732 | assuming all instructions are narrow and all no-ops removed; then | |
6733 | walk through.... */ | |
6734 | ||
6735 | /* For each segment of this that has a solid constraint, check to | |
6736 | see if there are any combinations that will keep the constraint. | |
6737 | If so, use it. */ | |
6738 | for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++) | |
e0001a05 | 6739 | { |
43cd72b9 BW |
6740 | bfd_boolean requires_text_end_align = FALSE; |
6741 | unsigned longcall_count = 0; | |
6742 | unsigned longcall_convert_count = 0; | |
6743 | unsigned narrowable_count = 0; | |
6744 | unsigned narrowable_convert_count = 0; | |
6745 | unsigned widenable_count = 0; | |
6746 | unsigned widenable_convert_count = 0; | |
e0001a05 | 6747 | |
43cd72b9 BW |
6748 | proposed_action *action = NULL; |
6749 | int align = (1 << ebb_table->ebb.sec->alignment_power); | |
e0001a05 | 6750 | |
43cd72b9 | 6751 | seg_idx_start = seg_idx_end; |
e0001a05 | 6752 | |
43cd72b9 BW |
6753 | for (i = seg_idx_start; i < ebb_table->action_count; i++) |
6754 | { | |
6755 | action = &ebb_table->actions[i]; | |
6756 | if (action->action == ta_convert_longcall) | |
6757 | longcall_count++; | |
6758 | if (action->action == ta_narrow_insn) | |
6759 | narrowable_count++; | |
6760 | if (action->action == ta_widen_insn) | |
6761 | widenable_count++; | |
6762 | if (action->action == ta_fill) | |
6763 | break; | |
6764 | if (action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
6765 | break; | |
6766 | if (action->align_type == EBB_REQUIRE_TGT_ALIGN | |
6767 | && !elf32xtensa_size_opt) | |
6768 | break; | |
6769 | } | |
6770 | seg_idx_end = i; | |
e0001a05 | 6771 | |
43cd72b9 BW |
6772 | if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable) |
6773 | requires_text_end_align = TRUE; | |
e0001a05 | 6774 | |
43cd72b9 BW |
6775 | if (elf32xtensa_size_opt && !requires_text_end_align |
6776 | && action->align_type != EBB_REQUIRE_LOOP_ALIGN | |
6777 | && action->align_type != EBB_REQUIRE_TGT_ALIGN) | |
6778 | { | |
6779 | longcall_convert_count = longcall_count; | |
6780 | narrowable_convert_count = narrowable_count; | |
6781 | widenable_convert_count = 0; | |
6782 | } | |
6783 | else | |
6784 | { | |
6785 | /* There is a constraint. Convert the max number of longcalls. */ | |
6786 | narrowable_convert_count = 0; | |
6787 | longcall_convert_count = 0; | |
6788 | widenable_convert_count = 0; | |
e0001a05 | 6789 | |
43cd72b9 | 6790 | for (j = 0; j < longcall_count; j++) |
e0001a05 | 6791 | { |
43cd72b9 BW |
6792 | int removed = (longcall_count - j) * 3 & (align - 1); |
6793 | unsigned desire_narrow = (align - removed) & (align - 1); | |
6794 | unsigned desire_widen = removed; | |
6795 | if (desire_narrow <= narrowable_count) | |
6796 | { | |
6797 | narrowable_convert_count = desire_narrow; | |
6798 | narrowable_convert_count += | |
6799 | (align * ((narrowable_count - narrowable_convert_count) | |
6800 | / align)); | |
6801 | longcall_convert_count = (longcall_count - j); | |
6802 | widenable_convert_count = 0; | |
6803 | break; | |
6804 | } | |
6805 | if (desire_widen <= widenable_count && !elf32xtensa_size_opt) | |
6806 | { | |
6807 | narrowable_convert_count = 0; | |
6808 | longcall_convert_count = longcall_count - j; | |
6809 | widenable_convert_count = desire_widen; | |
6810 | break; | |
6811 | } | |
6812 | } | |
6813 | } | |
e0001a05 | 6814 | |
43cd72b9 BW |
6815 | /* Now the number of conversions are saved. Do them. */ |
6816 | for (i = seg_idx_start; i < seg_idx_end; i++) | |
6817 | { | |
6818 | action = &ebb_table->actions[i]; | |
6819 | switch (action->action) | |
6820 | { | |
6821 | case ta_convert_longcall: | |
6822 | if (longcall_convert_count != 0) | |
6823 | { | |
6824 | action->action = ta_remove_longcall; | |
6825 | action->do_action = TRUE; | |
6826 | action->removed_bytes += 3; | |
6827 | longcall_convert_count--; | |
6828 | } | |
6829 | break; | |
6830 | case ta_narrow_insn: | |
6831 | if (narrowable_convert_count != 0) | |
6832 | { | |
6833 | action->do_action = TRUE; | |
6834 | action->removed_bytes += 1; | |
6835 | narrowable_convert_count--; | |
6836 | } | |
6837 | break; | |
6838 | case ta_widen_insn: | |
6839 | if (widenable_convert_count != 0) | |
6840 | { | |
6841 | action->do_action = TRUE; | |
6842 | action->removed_bytes -= 1; | |
6843 | widenable_convert_count--; | |
6844 | } | |
6845 | break; | |
6846 | default: | |
6847 | break; | |
e0001a05 | 6848 | } |
43cd72b9 BW |
6849 | } |
6850 | } | |
e0001a05 | 6851 | |
43cd72b9 BW |
6852 | /* Now we move on to some local opts. Try to remove each of the |
6853 | remaining longcalls. */ | |
e0001a05 | 6854 | |
43cd72b9 BW |
6855 | if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable) |
6856 | { | |
6857 | removed_bytes = 0; | |
6858 | for (i = 0; i < ebb_table->action_count; i++) | |
e0001a05 | 6859 | { |
43cd72b9 BW |
6860 | int old_removed_bytes = removed_bytes; |
6861 | proposed_action *action = &ebb_table->actions[i]; | |
6862 | ||
6863 | if (action->do_action && action->action == ta_convert_longcall) | |
6864 | { | |
6865 | bfd_boolean bad_alignment = FALSE; | |
6866 | removed_bytes += 3; | |
6867 | for (j = i + 1; j < ebb_table->action_count; j++) | |
6868 | { | |
6869 | proposed_action *new_action = &ebb_table->actions[j]; | |
6870 | bfd_vma offset = new_action->offset; | |
6871 | if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN) | |
6872 | { | |
6873 | if (!check_branch_target_aligned | |
6874 | (ebb_table->ebb.contents, | |
6875 | ebb_table->ebb.content_length, | |
6876 | offset, offset - removed_bytes)) | |
6877 | { | |
6878 | bad_alignment = TRUE; | |
6879 | break; | |
6880 | } | |
6881 | } | |
6882 | if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
6883 | { | |
6884 | if (!check_loop_aligned (ebb_table->ebb.contents, | |
6885 | ebb_table->ebb.content_length, | |
6886 | offset, | |
6887 | offset - removed_bytes)) | |
6888 | { | |
6889 | bad_alignment = TRUE; | |
6890 | break; | |
6891 | } | |
6892 | } | |
6893 | if (new_action->action == ta_narrow_insn | |
6894 | && !new_action->do_action | |
6895 | && ebb_table->ebb.sec->alignment_power == 2) | |
6896 | { | |
6897 | /* Narrow an instruction and we are done. */ | |
6898 | new_action->do_action = TRUE; | |
6899 | new_action->removed_bytes += 1; | |
6900 | bad_alignment = FALSE; | |
6901 | break; | |
6902 | } | |
6903 | if (new_action->action == ta_widen_insn | |
6904 | && new_action->do_action | |
6905 | && ebb_table->ebb.sec->alignment_power == 2) | |
6906 | { | |
6907 | /* Narrow an instruction and we are done. */ | |
6908 | new_action->do_action = FALSE; | |
6909 | new_action->removed_bytes += 1; | |
6910 | bad_alignment = FALSE; | |
6911 | break; | |
6912 | } | |
6913 | } | |
6914 | if (!bad_alignment) | |
6915 | { | |
6916 | action->removed_bytes += 3; | |
6917 | action->action = ta_remove_longcall; | |
6918 | action->do_action = TRUE; | |
6919 | } | |
6920 | } | |
6921 | removed_bytes = old_removed_bytes; | |
6922 | if (action->do_action) | |
6923 | removed_bytes += action->removed_bytes; | |
e0001a05 NC |
6924 | } |
6925 | } | |
6926 | ||
43cd72b9 BW |
6927 | removed_bytes = 0; |
6928 | for (i = 0; i < ebb_table->action_count; ++i) | |
6929 | { | |
6930 | proposed_action *action = &ebb_table->actions[i]; | |
6931 | if (action->do_action) | |
6932 | removed_bytes += action->removed_bytes; | |
6933 | } | |
6934 | ||
6935 | if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0 | |
6936 | && ebb->ends_unreachable) | |
6937 | { | |
6938 | proposed_action *action; | |
6939 | int br; | |
6940 | int extra_space; | |
6941 | ||
6942 | BFD_ASSERT (ebb_table->action_count != 0); | |
6943 | action = &ebb_table->actions[ebb_table->action_count - 1]; | |
6944 | BFD_ASSERT (action->action == ta_fill); | |
6945 | BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE); | |
6946 | ||
6947 | extra_space = compute_fill_extra_space (ebb->ends_unreachable); | |
6948 | br = action->removed_bytes + removed_bytes + extra_space; | |
6949 | br = br & ((1 << ebb->sec->alignment_power ) - 1); | |
6950 | ||
6951 | action->removed_bytes = extra_space - br; | |
6952 | } | |
6953 | return TRUE; | |
e0001a05 NC |
6954 | } |
6955 | ||
6956 | ||
03e94c08 BW |
6957 | /* The xlate_map is a sorted array of address mappings designed to |
6958 | answer the offset_with_removed_text() query with a binary search instead | |
6959 | of a linear search through the section's action_list. */ | |
6960 | ||
6961 | typedef struct xlate_map_entry xlate_map_entry_t; | |
6962 | typedef struct xlate_map xlate_map_t; | |
6963 | ||
6964 | struct xlate_map_entry | |
6965 | { | |
6966 | unsigned orig_address; | |
6967 | unsigned new_address; | |
6968 | unsigned size; | |
6969 | }; | |
6970 | ||
6971 | struct xlate_map | |
6972 | { | |
6973 | unsigned entry_count; | |
6974 | xlate_map_entry_t *entry; | |
6975 | }; | |
6976 | ||
6977 | ||
6978 | static int | |
6979 | xlate_compare (const void *a_v, const void *b_v) | |
6980 | { | |
6981 | const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v; | |
6982 | const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v; | |
6983 | if (a->orig_address < b->orig_address) | |
6984 | return -1; | |
6985 | if (a->orig_address > (b->orig_address + b->size - 1)) | |
6986 | return 1; | |
6987 | return 0; | |
6988 | } | |
6989 | ||
6990 | ||
6991 | static bfd_vma | |
6992 | xlate_offset_with_removed_text (const xlate_map_t *map, | |
6993 | text_action_list *action_list, | |
6994 | bfd_vma offset) | |
6995 | { | |
6996 | xlate_map_entry_t tmp; | |
6997 | void *r; | |
6998 | xlate_map_entry_t *e; | |
6999 | ||
7000 | if (map == NULL) | |
7001 | return offset_with_removed_text (action_list, offset); | |
7002 | ||
7003 | if (map->entry_count == 0) | |
7004 | return offset; | |
7005 | ||
7006 | tmp.orig_address = offset; | |
7007 | tmp.new_address = offset; | |
7008 | tmp.size = 1; | |
7009 | ||
7010 | r = bsearch (&offset, map->entry, map->entry_count, | |
7011 | sizeof (xlate_map_entry_t), &xlate_compare); | |
7012 | e = (xlate_map_entry_t *) r; | |
7013 | ||
7014 | BFD_ASSERT (e != NULL); | |
7015 | if (e == NULL) | |
7016 | return offset; | |
7017 | return e->new_address - e->orig_address + offset; | |
7018 | } | |
7019 | ||
7020 | ||
7021 | /* Build a binary searchable offset translation map from a section's | |
7022 | action list. */ | |
7023 | ||
7024 | static xlate_map_t * | |
7025 | build_xlate_map (asection *sec, xtensa_relax_info *relax_info) | |
7026 | { | |
7027 | xlate_map_t *map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t)); | |
7028 | text_action_list *action_list = &relax_info->action_list; | |
7029 | unsigned num_actions = 0; | |
7030 | text_action *r; | |
7031 | int removed; | |
7032 | xlate_map_entry_t *current_entry; | |
7033 | ||
7034 | if (map == NULL) | |
7035 | return NULL; | |
7036 | ||
7037 | num_actions = action_list_count (action_list); | |
7038 | map->entry = (xlate_map_entry_t *) | |
7039 | bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1)); | |
7040 | if (map->entry == NULL) | |
7041 | { | |
7042 | free (map); | |
7043 | return NULL; | |
7044 | } | |
7045 | map->entry_count = 0; | |
7046 | ||
7047 | removed = 0; | |
7048 | current_entry = &map->entry[0]; | |
7049 | ||
7050 | current_entry->orig_address = 0; | |
7051 | current_entry->new_address = 0; | |
7052 | current_entry->size = 0; | |
7053 | ||
7054 | for (r = action_list->head; r != NULL; r = r->next) | |
7055 | { | |
7056 | unsigned orig_size = 0; | |
7057 | switch (r->action) | |
7058 | { | |
7059 | case ta_none: | |
7060 | case ta_remove_insn: | |
7061 | case ta_convert_longcall: | |
7062 | case ta_remove_literal: | |
7063 | case ta_add_literal: | |
7064 | break; | |
7065 | case ta_remove_longcall: | |
7066 | orig_size = 6; | |
7067 | break; | |
7068 | case ta_narrow_insn: | |
7069 | orig_size = 3; | |
7070 | break; | |
7071 | case ta_widen_insn: | |
7072 | orig_size = 2; | |
7073 | break; | |
7074 | case ta_fill: | |
7075 | break; | |
7076 | } | |
7077 | current_entry->size = | |
7078 | r->offset + orig_size - current_entry->orig_address; | |
7079 | if (current_entry->size != 0) | |
7080 | { | |
7081 | current_entry++; | |
7082 | map->entry_count++; | |
7083 | } | |
7084 | current_entry->orig_address = r->offset + orig_size; | |
7085 | removed += r->removed_bytes; | |
7086 | current_entry->new_address = r->offset + orig_size - removed; | |
7087 | current_entry->size = 0; | |
7088 | } | |
7089 | ||
7090 | current_entry->size = (bfd_get_section_limit (sec->owner, sec) | |
7091 | - current_entry->orig_address); | |
7092 | if (current_entry->size != 0) | |
7093 | map->entry_count++; | |
7094 | ||
7095 | return map; | |
7096 | } | |
7097 | ||
7098 | ||
7099 | /* Free an offset translation map. */ | |
7100 | ||
7101 | static void | |
7102 | free_xlate_map (xlate_map_t *map) | |
7103 | { | |
7104 | if (map && map->entry) | |
7105 | free (map->entry); | |
7106 | if (map) | |
7107 | free (map); | |
7108 | } | |
7109 | ||
7110 | ||
43cd72b9 BW |
7111 | /* Use check_section_ebb_pcrels_fit to make sure that all of the |
7112 | relocations in a section will fit if a proposed set of actions | |
7113 | are performed. */ | |
e0001a05 | 7114 | |
43cd72b9 | 7115 | static bfd_boolean |
7fa3d080 BW |
7116 | check_section_ebb_pcrels_fit (bfd *abfd, |
7117 | asection *sec, | |
7118 | bfd_byte *contents, | |
7119 | Elf_Internal_Rela *internal_relocs, | |
cb337148 BW |
7120 | const ebb_constraint *constraint, |
7121 | const xtensa_opcode *reloc_opcodes) | |
e0001a05 | 7122 | { |
43cd72b9 BW |
7123 | unsigned i, j; |
7124 | Elf_Internal_Rela *irel; | |
03e94c08 BW |
7125 | xlate_map_t *xmap = NULL; |
7126 | bfd_boolean ok = TRUE; | |
43cd72b9 | 7127 | xtensa_relax_info *relax_info; |
e0001a05 | 7128 | |
43cd72b9 | 7129 | relax_info = get_xtensa_relax_info (sec); |
e0001a05 | 7130 | |
03e94c08 BW |
7131 | if (relax_info && sec->reloc_count > 100) |
7132 | { | |
7133 | xmap = build_xlate_map (sec, relax_info); | |
7134 | /* NULL indicates out of memory, but the slow version | |
7135 | can still be used. */ | |
7136 | } | |
7137 | ||
43cd72b9 BW |
7138 | for (i = 0; i < sec->reloc_count; i++) |
7139 | { | |
7140 | r_reloc r_rel; | |
7141 | bfd_vma orig_self_offset, orig_target_offset; | |
7142 | bfd_vma self_offset, target_offset; | |
7143 | int r_type; | |
7144 | reloc_howto_type *howto; | |
7145 | int self_removed_bytes, target_removed_bytes; | |
e0001a05 | 7146 | |
43cd72b9 BW |
7147 | irel = &internal_relocs[i]; |
7148 | r_type = ELF32_R_TYPE (irel->r_info); | |
e0001a05 | 7149 | |
43cd72b9 BW |
7150 | howto = &elf_howto_table[r_type]; |
7151 | /* We maintain the required invariant: PC-relative relocations | |
7152 | that fit before linking must fit after linking. Thus we only | |
7153 | need to deal with relocations to the same section that are | |
7154 | PC-relative. */ | |
7155 | if (ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY | |
7156 | || !howto->pc_relative) | |
7157 | continue; | |
e0001a05 | 7158 | |
43cd72b9 BW |
7159 | r_reloc_init (&r_rel, abfd, irel, contents, |
7160 | bfd_get_section_limit (abfd, sec)); | |
e0001a05 | 7161 | |
43cd72b9 BW |
7162 | if (r_reloc_get_section (&r_rel) != sec) |
7163 | continue; | |
e0001a05 | 7164 | |
43cd72b9 BW |
7165 | orig_self_offset = irel->r_offset; |
7166 | orig_target_offset = r_rel.target_offset; | |
e0001a05 | 7167 | |
43cd72b9 BW |
7168 | self_offset = orig_self_offset; |
7169 | target_offset = orig_target_offset; | |
7170 | ||
7171 | if (relax_info) | |
7172 | { | |
03e94c08 BW |
7173 | self_offset = |
7174 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7175 | orig_self_offset); | |
7176 | target_offset = | |
7177 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
7178 | orig_target_offset); | |
43cd72b9 BW |
7179 | } |
7180 | ||
7181 | self_removed_bytes = 0; | |
7182 | target_removed_bytes = 0; | |
7183 | ||
7184 | for (j = 0; j < constraint->action_count; ++j) | |
7185 | { | |
7186 | proposed_action *action = &constraint->actions[j]; | |
7187 | bfd_vma offset = action->offset; | |
7188 | int removed_bytes = action->removed_bytes; | |
7189 | if (offset < orig_self_offset | |
7190 | || (offset == orig_self_offset && action->action == ta_fill | |
7191 | && action->removed_bytes < 0)) | |
7192 | self_removed_bytes += removed_bytes; | |
7193 | if (offset < orig_target_offset | |
7194 | || (offset == orig_target_offset && action->action == ta_fill | |
7195 | && action->removed_bytes < 0)) | |
7196 | target_removed_bytes += removed_bytes; | |
7197 | } | |
7198 | self_offset -= self_removed_bytes; | |
7199 | target_offset -= target_removed_bytes; | |
7200 | ||
7201 | /* Try to encode it. Get the operand and check. */ | |
7202 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
7203 | { | |
7204 | /* None of the current alternate relocs are PC-relative, | |
7205 | and only PC-relative relocs matter here. */ | |
7206 | } | |
7207 | else | |
7208 | { | |
7209 | xtensa_opcode opcode; | |
7210 | int opnum; | |
7211 | ||
cb337148 BW |
7212 | if (reloc_opcodes) |
7213 | opcode = reloc_opcodes[i]; | |
7214 | else | |
7215 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
43cd72b9 | 7216 | if (opcode == XTENSA_UNDEFINED) |
03e94c08 BW |
7217 | { |
7218 | ok = FALSE; | |
7219 | break; | |
7220 | } | |
43cd72b9 BW |
7221 | |
7222 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
7223 | if (opnum == XTENSA_UNDEFINED) | |
03e94c08 BW |
7224 | { |
7225 | ok = FALSE; | |
7226 | break; | |
7227 | } | |
43cd72b9 BW |
7228 | |
7229 | if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset)) | |
03e94c08 BW |
7230 | { |
7231 | ok = FALSE; | |
7232 | break; | |
7233 | } | |
43cd72b9 BW |
7234 | } |
7235 | } | |
7236 | ||
03e94c08 BW |
7237 | if (xmap) |
7238 | free_xlate_map (xmap); | |
7239 | ||
7240 | return ok; | |
43cd72b9 BW |
7241 | } |
7242 | ||
7243 | ||
7244 | static bfd_boolean | |
7fa3d080 | 7245 | check_section_ebb_reduces (const ebb_constraint *constraint) |
43cd72b9 BW |
7246 | { |
7247 | int removed = 0; | |
7248 | unsigned i; | |
7249 | ||
7250 | for (i = 0; i < constraint->action_count; i++) | |
7251 | { | |
7252 | const proposed_action *action = &constraint->actions[i]; | |
7253 | if (action->do_action) | |
7254 | removed += action->removed_bytes; | |
7255 | } | |
7256 | if (removed < 0) | |
e0001a05 NC |
7257 | return FALSE; |
7258 | ||
7259 | return TRUE; | |
7260 | } | |
7261 | ||
7262 | ||
43cd72b9 | 7263 | void |
7fa3d080 BW |
7264 | text_action_add_proposed (text_action_list *l, |
7265 | const ebb_constraint *ebb_table, | |
7266 | asection *sec) | |
e0001a05 NC |
7267 | { |
7268 | unsigned i; | |
7269 | ||
43cd72b9 | 7270 | for (i = 0; i < ebb_table->action_count; i++) |
e0001a05 | 7271 | { |
43cd72b9 | 7272 | proposed_action *action = &ebb_table->actions[i]; |
e0001a05 | 7273 | |
43cd72b9 | 7274 | if (!action->do_action) |
e0001a05 | 7275 | continue; |
43cd72b9 BW |
7276 | switch (action->action) |
7277 | { | |
7278 | case ta_remove_insn: | |
7279 | case ta_remove_longcall: | |
7280 | case ta_convert_longcall: | |
7281 | case ta_narrow_insn: | |
7282 | case ta_widen_insn: | |
7283 | case ta_fill: | |
7284 | case ta_remove_literal: | |
7285 | text_action_add (l, action->action, sec, action->offset, | |
7286 | action->removed_bytes); | |
7287 | break; | |
7288 | case ta_none: | |
7289 | break; | |
7290 | default: | |
7291 | BFD_ASSERT (0); | |
7292 | break; | |
7293 | } | |
e0001a05 | 7294 | } |
43cd72b9 | 7295 | } |
e0001a05 | 7296 | |
43cd72b9 BW |
7297 | |
7298 | int | |
7fa3d080 | 7299 | compute_fill_extra_space (property_table_entry *entry) |
43cd72b9 BW |
7300 | { |
7301 | int fill_extra_space; | |
7302 | ||
7303 | if (!entry) | |
7304 | return 0; | |
7305 | ||
7306 | if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0) | |
7307 | return 0; | |
7308 | ||
7309 | fill_extra_space = entry->size; | |
7310 | if ((entry->flags & XTENSA_PROP_ALIGN) != 0) | |
7311 | { | |
7312 | /* Fill bytes for alignment: | |
7313 | (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */ | |
7314 | int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags); | |
7315 | int nsm = (1 << pow) - 1; | |
7316 | bfd_vma addr = entry->address + entry->size; | |
7317 | bfd_vma align_fill = nsm - ((addr + nsm) & nsm); | |
7318 | fill_extra_space += align_fill; | |
7319 | } | |
7320 | return fill_extra_space; | |
e0001a05 NC |
7321 | } |
7322 | ||
43cd72b9 | 7323 | \f |
e0001a05 NC |
7324 | /* First relaxation pass. */ |
7325 | ||
43cd72b9 BW |
7326 | /* If the section contains relaxable literals, check each literal to |
7327 | see if it has the same value as another literal that has already | |
7328 | been seen, either in the current section or a previous one. If so, | |
7329 | add an entry to the per-section list of removed literals. The | |
e0001a05 NC |
7330 | actual changes are deferred until the next pass. */ |
7331 | ||
7332 | static bfd_boolean | |
7fa3d080 BW |
7333 | compute_removed_literals (bfd *abfd, |
7334 | asection *sec, | |
7335 | struct bfd_link_info *link_info, | |
7336 | value_map_hash_table *values) | |
e0001a05 NC |
7337 | { |
7338 | xtensa_relax_info *relax_info; | |
7339 | bfd_byte *contents; | |
7340 | Elf_Internal_Rela *internal_relocs; | |
43cd72b9 | 7341 | source_reloc *src_relocs, *rel; |
e0001a05 | 7342 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
7343 | property_table_entry *prop_table = NULL; |
7344 | int ptblsize; | |
7345 | int i, prev_i; | |
7346 | bfd_boolean last_loc_is_prev = FALSE; | |
7347 | bfd_vma last_target_offset = 0; | |
7348 | section_cache_t target_sec_cache; | |
7349 | bfd_size_type sec_size; | |
7350 | ||
7351 | init_section_cache (&target_sec_cache); | |
e0001a05 NC |
7352 | |
7353 | /* Do nothing if it is not a relaxable literal section. */ | |
7354 | relax_info = get_xtensa_relax_info (sec); | |
7355 | BFD_ASSERT (relax_info); | |
e0001a05 NC |
7356 | if (!relax_info->is_relaxable_literal_section) |
7357 | return ok; | |
7358 | ||
7359 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
7360 | link_info->keep_memory); | |
7361 | ||
43cd72b9 | 7362 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 | 7363 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 7364 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
7365 | { |
7366 | ok = FALSE; | |
7367 | goto error_return; | |
7368 | } | |
7369 | ||
7370 | /* Sort the source_relocs by target offset. */ | |
7371 | src_relocs = relax_info->src_relocs; | |
7372 | qsort (src_relocs, relax_info->src_count, | |
7373 | sizeof (source_reloc), source_reloc_compare); | |
43cd72b9 BW |
7374 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
7375 | internal_reloc_compare); | |
e0001a05 | 7376 | |
43cd72b9 BW |
7377 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
7378 | XTENSA_PROP_SEC_NAME, FALSE); | |
7379 | if (ptblsize < 0) | |
7380 | { | |
7381 | ok = FALSE; | |
7382 | goto error_return; | |
7383 | } | |
7384 | ||
7385 | prev_i = -1; | |
e0001a05 NC |
7386 | for (i = 0; i < relax_info->src_count; i++) |
7387 | { | |
e0001a05 | 7388 | Elf_Internal_Rela *irel = NULL; |
e0001a05 NC |
7389 | |
7390 | rel = &src_relocs[i]; | |
43cd72b9 BW |
7391 | if (get_l32r_opcode () != rel->opcode) |
7392 | continue; | |
e0001a05 NC |
7393 | irel = get_irel_at_offset (sec, internal_relocs, |
7394 | rel->r_rel.target_offset); | |
7395 | ||
43cd72b9 BW |
7396 | /* If the relocation on this is not a simple R_XTENSA_32 or |
7397 | R_XTENSA_PLT then do not consider it. This may happen when | |
7398 | the difference of two symbols is used in a literal. */ | |
7399 | if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32 | |
7400 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT)) | |
7401 | continue; | |
7402 | ||
e0001a05 NC |
7403 | /* If the target_offset for this relocation is the same as the |
7404 | previous relocation, then we've already considered whether the | |
7405 | literal can be coalesced. Skip to the next one.... */ | |
43cd72b9 BW |
7406 | if (i != 0 && prev_i != -1 |
7407 | && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset) | |
e0001a05 | 7408 | continue; |
43cd72b9 BW |
7409 | prev_i = i; |
7410 | ||
7411 | if (last_loc_is_prev && | |
7412 | last_target_offset + 4 != rel->r_rel.target_offset) | |
7413 | last_loc_is_prev = FALSE; | |
e0001a05 NC |
7414 | |
7415 | /* Check if the relocation was from an L32R that is being removed | |
7416 | because a CALLX was converted to a direct CALL, and check if | |
7417 | there are no other relocations to the literal. */ | |
43cd72b9 | 7418 | if (is_removable_literal (rel, i, src_relocs, relax_info->src_count)) |
e0001a05 | 7419 | { |
43cd72b9 BW |
7420 | if (!remove_dead_literal (abfd, sec, link_info, internal_relocs, |
7421 | irel, rel, prop_table, ptblsize)) | |
e0001a05 | 7422 | { |
43cd72b9 BW |
7423 | ok = FALSE; |
7424 | goto error_return; | |
e0001a05 | 7425 | } |
43cd72b9 | 7426 | last_target_offset = rel->r_rel.target_offset; |
e0001a05 NC |
7427 | continue; |
7428 | } | |
7429 | ||
43cd72b9 BW |
7430 | if (!identify_literal_placement (abfd, sec, contents, link_info, |
7431 | values, | |
7432 | &last_loc_is_prev, irel, | |
7433 | relax_info->src_count - i, rel, | |
7434 | prop_table, ptblsize, | |
7435 | &target_sec_cache, rel->is_abs_literal)) | |
e0001a05 | 7436 | { |
43cd72b9 BW |
7437 | ok = FALSE; |
7438 | goto error_return; | |
7439 | } | |
7440 | last_target_offset = rel->r_rel.target_offset; | |
7441 | } | |
e0001a05 | 7442 | |
43cd72b9 BW |
7443 | #if DEBUG |
7444 | print_removed_literals (stderr, &relax_info->removed_list); | |
7445 | print_action_list (stderr, &relax_info->action_list); | |
7446 | #endif /* DEBUG */ | |
7447 | ||
7448 | error_return: | |
7449 | if (prop_table) free (prop_table); | |
7450 | clear_section_cache (&target_sec_cache); | |
7451 | ||
7452 | release_contents (sec, contents); | |
7453 | release_internal_relocs (sec, internal_relocs); | |
7454 | return ok; | |
7455 | } | |
7456 | ||
7457 | ||
7458 | static Elf_Internal_Rela * | |
7fa3d080 BW |
7459 | get_irel_at_offset (asection *sec, |
7460 | Elf_Internal_Rela *internal_relocs, | |
7461 | bfd_vma offset) | |
43cd72b9 BW |
7462 | { |
7463 | unsigned i; | |
7464 | Elf_Internal_Rela *irel; | |
7465 | unsigned r_type; | |
7466 | Elf_Internal_Rela key; | |
7467 | ||
7468 | if (!internal_relocs) | |
7469 | return NULL; | |
7470 | ||
7471 | key.r_offset = offset; | |
7472 | irel = bsearch (&key, internal_relocs, sec->reloc_count, | |
7473 | sizeof (Elf_Internal_Rela), internal_reloc_matches); | |
7474 | if (!irel) | |
7475 | return NULL; | |
7476 | ||
7477 | /* bsearch does not guarantee which will be returned if there are | |
7478 | multiple matches. We need the first that is not an alignment. */ | |
7479 | i = irel - internal_relocs; | |
7480 | while (i > 0) | |
7481 | { | |
7482 | if (internal_relocs[i-1].r_offset != offset) | |
7483 | break; | |
7484 | i--; | |
7485 | } | |
7486 | for ( ; i < sec->reloc_count; i++) | |
7487 | { | |
7488 | irel = &internal_relocs[i]; | |
7489 | r_type = ELF32_R_TYPE (irel->r_info); | |
7490 | if (irel->r_offset == offset && r_type != R_XTENSA_NONE) | |
7491 | return irel; | |
7492 | } | |
7493 | ||
7494 | return NULL; | |
7495 | } | |
7496 | ||
7497 | ||
7498 | bfd_boolean | |
7fa3d080 BW |
7499 | is_removable_literal (const source_reloc *rel, |
7500 | int i, | |
7501 | const source_reloc *src_relocs, | |
7502 | int src_count) | |
43cd72b9 BW |
7503 | { |
7504 | const source_reloc *curr_rel; | |
7505 | if (!rel->is_null) | |
7506 | return FALSE; | |
7507 | ||
7508 | for (++i; i < src_count; ++i) | |
7509 | { | |
7510 | curr_rel = &src_relocs[i]; | |
7511 | /* If all others have the same target offset.... */ | |
7512 | if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset) | |
7513 | return TRUE; | |
7514 | ||
7515 | if (!curr_rel->is_null | |
7516 | && !xtensa_is_property_section (curr_rel->source_sec) | |
7517 | && !(curr_rel->source_sec->flags & SEC_DEBUGGING)) | |
7518 | return FALSE; | |
7519 | } | |
7520 | return TRUE; | |
7521 | } | |
7522 | ||
7523 | ||
7524 | bfd_boolean | |
7fa3d080 BW |
7525 | remove_dead_literal (bfd *abfd, |
7526 | asection *sec, | |
7527 | struct bfd_link_info *link_info, | |
7528 | Elf_Internal_Rela *internal_relocs, | |
7529 | Elf_Internal_Rela *irel, | |
7530 | source_reloc *rel, | |
7531 | property_table_entry *prop_table, | |
7532 | int ptblsize) | |
43cd72b9 BW |
7533 | { |
7534 | property_table_entry *entry; | |
7535 | xtensa_relax_info *relax_info; | |
7536 | ||
7537 | relax_info = get_xtensa_relax_info (sec); | |
7538 | if (!relax_info) | |
7539 | return FALSE; | |
7540 | ||
7541 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7542 | sec->vma + rel->r_rel.target_offset); | |
7543 | ||
7544 | /* Mark the unused literal so that it will be removed. */ | |
7545 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL); | |
7546 | ||
7547 | text_action_add (&relax_info->action_list, | |
7548 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7549 | ||
7550 | /* If the section is 4-byte aligned, do not add fill. */ | |
7551 | if (sec->alignment_power > 2) | |
7552 | { | |
7553 | int fill_extra_space; | |
7554 | bfd_vma entry_sec_offset; | |
7555 | text_action *fa; | |
7556 | property_table_entry *the_add_entry; | |
7557 | int removed_diff; | |
7558 | ||
7559 | if (entry) | |
7560 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
7561 | else | |
7562 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
7563 | ||
7564 | /* If the literal range is at the end of the section, | |
7565 | do not add fill. */ | |
7566 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7567 | entry_sec_offset); | |
7568 | fill_extra_space = compute_fill_extra_space (the_add_entry); | |
7569 | ||
7570 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
7571 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
7572 | -4, fill_extra_space); | |
7573 | if (fa) | |
7574 | adjust_fill_action (fa, removed_diff); | |
7575 | else | |
7576 | text_action_add (&relax_info->action_list, | |
7577 | ta_fill, sec, entry_sec_offset, removed_diff); | |
7578 | } | |
7579 | ||
7580 | /* Zero out the relocation on this literal location. */ | |
7581 | if (irel) | |
7582 | { | |
7583 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
7584 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
7585 | ||
7586 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7587 | pin_internal_relocs (sec, internal_relocs); | |
7588 | } | |
7589 | ||
7590 | /* Do not modify "last_loc_is_prev". */ | |
7591 | return TRUE; | |
7592 | } | |
7593 | ||
7594 | ||
7595 | bfd_boolean | |
7fa3d080 BW |
7596 | identify_literal_placement (bfd *abfd, |
7597 | asection *sec, | |
7598 | bfd_byte *contents, | |
7599 | struct bfd_link_info *link_info, | |
7600 | value_map_hash_table *values, | |
7601 | bfd_boolean *last_loc_is_prev_p, | |
7602 | Elf_Internal_Rela *irel, | |
7603 | int remaining_src_rels, | |
7604 | source_reloc *rel, | |
7605 | property_table_entry *prop_table, | |
7606 | int ptblsize, | |
7607 | section_cache_t *target_sec_cache, | |
7608 | bfd_boolean is_abs_literal) | |
43cd72b9 BW |
7609 | { |
7610 | literal_value val; | |
7611 | value_map *val_map; | |
7612 | xtensa_relax_info *relax_info; | |
7613 | bfd_boolean literal_placed = FALSE; | |
7614 | r_reloc r_rel; | |
7615 | unsigned long value; | |
7616 | bfd_boolean final_static_link; | |
7617 | bfd_size_type sec_size; | |
7618 | ||
7619 | relax_info = get_xtensa_relax_info (sec); | |
7620 | if (!relax_info) | |
7621 | return FALSE; | |
7622 | ||
7623 | sec_size = bfd_get_section_limit (abfd, sec); | |
7624 | ||
7625 | final_static_link = | |
7626 | (!link_info->relocatable | |
7627 | && !elf_hash_table (link_info)->dynamic_sections_created); | |
7628 | ||
7629 | /* The placement algorithm first checks to see if the literal is | |
7630 | already in the value map. If so and the value map is reachable | |
7631 | from all uses, then the literal is moved to that location. If | |
7632 | not, then we identify the last location where a fresh literal was | |
7633 | placed. If the literal can be safely moved there, then we do so. | |
7634 | If not, then we assume that the literal is not to move and leave | |
7635 | the literal where it is, marking it as the last literal | |
7636 | location. */ | |
7637 | ||
7638 | /* Find the literal value. */ | |
7639 | value = 0; | |
7640 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7641 | if (!irel) | |
7642 | { | |
7643 | BFD_ASSERT (rel->r_rel.target_offset < sec_size); | |
7644 | value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset); | |
7645 | } | |
7646 | init_literal_value (&val, &r_rel, value, is_abs_literal); | |
7647 | ||
7648 | /* Check if we've seen another literal with the same value that | |
7649 | is in the same output section. */ | |
7650 | val_map = value_map_get_cached_value (values, &val, final_static_link); | |
7651 | ||
7652 | if (val_map | |
7653 | && (r_reloc_get_section (&val_map->loc)->output_section | |
7654 | == sec->output_section) | |
7655 | && relocations_reach (rel, remaining_src_rels, &val_map->loc) | |
7656 | && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map)) | |
7657 | { | |
7658 | /* No change to last_loc_is_prev. */ | |
7659 | literal_placed = TRUE; | |
7660 | } | |
7661 | ||
7662 | /* For relocatable links, do not try to move literals. To do it | |
7663 | correctly might increase the number of relocations in an input | |
7664 | section making the default relocatable linking fail. */ | |
7665 | if (!link_info->relocatable && !literal_placed | |
7666 | && values->has_last_loc && !(*last_loc_is_prev_p)) | |
7667 | { | |
7668 | asection *target_sec = r_reloc_get_section (&values->last_loc); | |
7669 | if (target_sec && target_sec->output_section == sec->output_section) | |
7670 | { | |
7671 | /* Increment the virtual offset. */ | |
7672 | r_reloc try_loc = values->last_loc; | |
7673 | try_loc.virtual_offset += 4; | |
7674 | ||
7675 | /* There is a last loc that was in the same output section. */ | |
7676 | if (relocations_reach (rel, remaining_src_rels, &try_loc) | |
7677 | && move_shared_literal (sec, link_info, rel, | |
7678 | prop_table, ptblsize, | |
7679 | &try_loc, &val, target_sec_cache)) | |
e0001a05 | 7680 | { |
43cd72b9 BW |
7681 | values->last_loc.virtual_offset += 4; |
7682 | literal_placed = TRUE; | |
7683 | if (!val_map) | |
7684 | val_map = add_value_map (values, &val, &try_loc, | |
7685 | final_static_link); | |
7686 | else | |
7687 | val_map->loc = try_loc; | |
e0001a05 NC |
7688 | } |
7689 | } | |
43cd72b9 BW |
7690 | } |
7691 | ||
7692 | if (!literal_placed) | |
7693 | { | |
7694 | /* Nothing worked, leave the literal alone but update the last loc. */ | |
7695 | values->has_last_loc = TRUE; | |
7696 | values->last_loc = rel->r_rel; | |
7697 | if (!val_map) | |
7698 | val_map = add_value_map (values, &val, &rel->r_rel, final_static_link); | |
e0001a05 | 7699 | else |
43cd72b9 BW |
7700 | val_map->loc = rel->r_rel; |
7701 | *last_loc_is_prev_p = TRUE; | |
e0001a05 NC |
7702 | } |
7703 | ||
43cd72b9 | 7704 | return TRUE; |
e0001a05 NC |
7705 | } |
7706 | ||
7707 | ||
7708 | /* Check if the original relocations (presumably on L32R instructions) | |
7709 | identified by reloc[0..N] can be changed to reference the literal | |
7710 | identified by r_rel. If r_rel is out of range for any of the | |
7711 | original relocations, then we don't want to coalesce the original | |
7712 | literal with the one at r_rel. We only check reloc[0..N], where the | |
7713 | offsets are all the same as for reloc[0] (i.e., they're all | |
7714 | referencing the same literal) and where N is also bounded by the | |
7715 | number of remaining entries in the "reloc" array. The "reloc" array | |
7716 | is sorted by target offset so we know all the entries for the same | |
7717 | literal will be contiguous. */ | |
7718 | ||
7719 | static bfd_boolean | |
7fa3d080 BW |
7720 | relocations_reach (source_reloc *reloc, |
7721 | int remaining_relocs, | |
7722 | const r_reloc *r_rel) | |
e0001a05 NC |
7723 | { |
7724 | bfd_vma from_offset, source_address, dest_address; | |
7725 | asection *sec; | |
7726 | int i; | |
7727 | ||
7728 | if (!r_reloc_is_defined (r_rel)) | |
7729 | return FALSE; | |
7730 | ||
7731 | sec = r_reloc_get_section (r_rel); | |
7732 | from_offset = reloc[0].r_rel.target_offset; | |
7733 | ||
7734 | for (i = 0; i < remaining_relocs; i++) | |
7735 | { | |
7736 | if (reloc[i].r_rel.target_offset != from_offset) | |
7737 | break; | |
7738 | ||
7739 | /* Ignore relocations that have been removed. */ | |
7740 | if (reloc[i].is_null) | |
7741 | continue; | |
7742 | ||
7743 | /* The original and new output section for these must be the same | |
7744 | in order to coalesce. */ | |
7745 | if (r_reloc_get_section (&reloc[i].r_rel)->output_section | |
7746 | != sec->output_section) | |
7747 | return FALSE; | |
7748 | ||
d638e0ac BW |
7749 | /* Absolute literals in the same output section can always be |
7750 | combined. */ | |
7751 | if (reloc[i].is_abs_literal) | |
7752 | continue; | |
7753 | ||
43cd72b9 BW |
7754 | /* A literal with no PC-relative relocations can be moved anywhere. */ |
7755 | if (reloc[i].opnd != -1) | |
e0001a05 NC |
7756 | { |
7757 | /* Otherwise, check to see that it fits. */ | |
7758 | source_address = (reloc[i].source_sec->output_section->vma | |
7759 | + reloc[i].source_sec->output_offset | |
7760 | + reloc[i].r_rel.rela.r_offset); | |
7761 | dest_address = (sec->output_section->vma | |
7762 | + sec->output_offset | |
7763 | + r_rel->target_offset); | |
7764 | ||
43cd72b9 BW |
7765 | if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd, |
7766 | source_address, dest_address)) | |
e0001a05 NC |
7767 | return FALSE; |
7768 | } | |
7769 | } | |
7770 | ||
7771 | return TRUE; | |
7772 | } | |
7773 | ||
7774 | ||
43cd72b9 BW |
7775 | /* Move a literal to another literal location because it is |
7776 | the same as the other literal value. */ | |
e0001a05 | 7777 | |
43cd72b9 | 7778 | static bfd_boolean |
7fa3d080 BW |
7779 | coalesce_shared_literal (asection *sec, |
7780 | source_reloc *rel, | |
7781 | property_table_entry *prop_table, | |
7782 | int ptblsize, | |
7783 | value_map *val_map) | |
e0001a05 | 7784 | { |
43cd72b9 BW |
7785 | property_table_entry *entry; |
7786 | text_action *fa; | |
7787 | property_table_entry *the_add_entry; | |
7788 | int removed_diff; | |
7789 | xtensa_relax_info *relax_info; | |
7790 | ||
7791 | relax_info = get_xtensa_relax_info (sec); | |
7792 | if (!relax_info) | |
7793 | return FALSE; | |
7794 | ||
7795 | entry = elf_xtensa_find_property_entry | |
7796 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
7797 | if (entry && (entry->flags & XTENSA_PROP_INSN_NO_TRANSFORM)) | |
7798 | return TRUE; | |
7799 | ||
7800 | /* Mark that the literal will be coalesced. */ | |
7801 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc); | |
7802 | ||
7803 | text_action_add (&relax_info->action_list, | |
7804 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7805 | ||
7806 | /* If the section is 4-byte aligned, do not add fill. */ | |
7807 | if (sec->alignment_power > 2) | |
e0001a05 | 7808 | { |
43cd72b9 BW |
7809 | int fill_extra_space; |
7810 | bfd_vma entry_sec_offset; | |
7811 | ||
7812 | if (entry) | |
7813 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
7814 | else | |
7815 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
7816 | ||
7817 | /* If the literal range is at the end of the section, | |
7818 | do not add fill. */ | |
7819 | fill_extra_space = 0; | |
7820 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7821 | entry_sec_offset); | |
7822 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
7823 | fill_extra_space = the_add_entry->size; | |
7824 | ||
7825 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
7826 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
7827 | -4, fill_extra_space); | |
7828 | if (fa) | |
7829 | adjust_fill_action (fa, removed_diff); | |
7830 | else | |
7831 | text_action_add (&relax_info->action_list, | |
7832 | ta_fill, sec, entry_sec_offset, removed_diff); | |
e0001a05 | 7833 | } |
43cd72b9 BW |
7834 | |
7835 | return TRUE; | |
7836 | } | |
7837 | ||
7838 | ||
7839 | /* Move a literal to another location. This may actually increase the | |
7840 | total amount of space used because of alignments so we need to do | |
7841 | this carefully. Also, it may make a branch go out of range. */ | |
7842 | ||
7843 | static bfd_boolean | |
7fa3d080 BW |
7844 | move_shared_literal (asection *sec, |
7845 | struct bfd_link_info *link_info, | |
7846 | source_reloc *rel, | |
7847 | property_table_entry *prop_table, | |
7848 | int ptblsize, | |
7849 | const r_reloc *target_loc, | |
7850 | const literal_value *lit_value, | |
7851 | section_cache_t *target_sec_cache) | |
43cd72b9 BW |
7852 | { |
7853 | property_table_entry *the_add_entry, *src_entry, *target_entry = NULL; | |
7854 | text_action *fa, *target_fa; | |
7855 | int removed_diff; | |
7856 | xtensa_relax_info *relax_info, *target_relax_info; | |
7857 | asection *target_sec; | |
7858 | ebb_t *ebb; | |
7859 | ebb_constraint ebb_table; | |
7860 | bfd_boolean relocs_fit; | |
7861 | ||
7862 | /* If this routine always returns FALSE, the literals that cannot be | |
7863 | coalesced will not be moved. */ | |
7864 | if (elf32xtensa_no_literal_movement) | |
7865 | return FALSE; | |
7866 | ||
7867 | relax_info = get_xtensa_relax_info (sec); | |
7868 | if (!relax_info) | |
7869 | return FALSE; | |
7870 | ||
7871 | target_sec = r_reloc_get_section (target_loc); | |
7872 | target_relax_info = get_xtensa_relax_info (target_sec); | |
7873 | ||
7874 | /* Literals to undefined sections may not be moved because they | |
7875 | must report an error. */ | |
7876 | if (bfd_is_und_section (target_sec)) | |
7877 | return FALSE; | |
7878 | ||
7879 | src_entry = elf_xtensa_find_property_entry | |
7880 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
7881 | ||
7882 | if (!section_cache_section (target_sec_cache, target_sec, link_info)) | |
7883 | return FALSE; | |
7884 | ||
7885 | target_entry = elf_xtensa_find_property_entry | |
7886 | (target_sec_cache->ptbl, target_sec_cache->pte_count, | |
7887 | target_sec->vma + target_loc->target_offset); | |
7888 | ||
7889 | if (!target_entry) | |
7890 | return FALSE; | |
7891 | ||
7892 | /* Make sure that we have not broken any branches. */ | |
7893 | relocs_fit = FALSE; | |
7894 | ||
7895 | init_ebb_constraint (&ebb_table); | |
7896 | ebb = &ebb_table.ebb; | |
7897 | init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents, | |
7898 | target_sec_cache->content_length, | |
7899 | target_sec_cache->ptbl, target_sec_cache->pte_count, | |
7900 | target_sec_cache->relocs, target_sec_cache->reloc_count); | |
7901 | ||
7902 | /* Propose to add 4 bytes + worst-case alignment size increase to | |
7903 | destination. */ | |
7904 | ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0, | |
7905 | ta_fill, target_loc->target_offset, | |
7906 | -4 - (1 << target_sec->alignment_power), TRUE); | |
7907 | ||
7908 | /* Check all of the PC-relative relocations to make sure they still fit. */ | |
7909 | relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec, | |
7910 | target_sec_cache->contents, | |
7911 | target_sec_cache->relocs, | |
cb337148 | 7912 | &ebb_table, NULL); |
43cd72b9 BW |
7913 | |
7914 | if (!relocs_fit) | |
7915 | return FALSE; | |
7916 | ||
7917 | text_action_add_literal (&target_relax_info->action_list, | |
7918 | ta_add_literal, target_loc, lit_value, -4); | |
7919 | ||
7920 | if (target_sec->alignment_power > 2 && target_entry != src_entry) | |
7921 | { | |
7922 | /* May need to add or remove some fill to maintain alignment. */ | |
7923 | int fill_extra_space; | |
7924 | bfd_vma entry_sec_offset; | |
7925 | ||
7926 | entry_sec_offset = | |
7927 | target_entry->address - target_sec->vma + target_entry->size; | |
7928 | ||
7929 | /* If the literal range is at the end of the section, | |
7930 | do not add fill. */ | |
7931 | fill_extra_space = 0; | |
7932 | the_add_entry = | |
7933 | elf_xtensa_find_property_entry (target_sec_cache->ptbl, | |
7934 | target_sec_cache->pte_count, | |
7935 | entry_sec_offset); | |
7936 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
7937 | fill_extra_space = the_add_entry->size; | |
7938 | ||
7939 | target_fa = find_fill_action (&target_relax_info->action_list, | |
7940 | target_sec, entry_sec_offset); | |
7941 | removed_diff = compute_removed_action_diff (target_fa, target_sec, | |
7942 | entry_sec_offset, 4, | |
7943 | fill_extra_space); | |
7944 | if (target_fa) | |
7945 | adjust_fill_action (target_fa, removed_diff); | |
7946 | else | |
7947 | text_action_add (&target_relax_info->action_list, | |
7948 | ta_fill, target_sec, entry_sec_offset, removed_diff); | |
7949 | } | |
7950 | ||
7951 | /* Mark that the literal will be moved to the new location. */ | |
7952 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc); | |
7953 | ||
7954 | /* Remove the literal. */ | |
7955 | text_action_add (&relax_info->action_list, | |
7956 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
7957 | ||
7958 | /* If the section is 4-byte aligned, do not add fill. */ | |
7959 | if (sec->alignment_power > 2 && target_entry != src_entry) | |
7960 | { | |
7961 | int fill_extra_space; | |
7962 | bfd_vma entry_sec_offset; | |
7963 | ||
7964 | if (src_entry) | |
7965 | entry_sec_offset = src_entry->address - sec->vma + src_entry->size; | |
7966 | else | |
7967 | entry_sec_offset = rel->r_rel.target_offset+4; | |
7968 | ||
7969 | /* If the literal range is at the end of the section, | |
7970 | do not add fill. */ | |
7971 | fill_extra_space = 0; | |
7972 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7973 | entry_sec_offset); | |
7974 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
7975 | fill_extra_space = the_add_entry->size; | |
7976 | ||
7977 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
7978 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
7979 | -4, fill_extra_space); | |
7980 | if (fa) | |
7981 | adjust_fill_action (fa, removed_diff); | |
7982 | else | |
7983 | text_action_add (&relax_info->action_list, | |
7984 | ta_fill, sec, entry_sec_offset, removed_diff); | |
7985 | } | |
7986 | ||
7987 | return TRUE; | |
e0001a05 NC |
7988 | } |
7989 | ||
7990 | \f | |
7991 | /* Second relaxation pass. */ | |
7992 | ||
7993 | /* Modify all of the relocations to point to the right spot, and if this | |
7994 | is a relaxable section, delete the unwanted literals and fix the | |
43cd72b9 | 7995 | section size. */ |
e0001a05 | 7996 | |
43cd72b9 | 7997 | bfd_boolean |
7fa3d080 | 7998 | relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info) |
e0001a05 NC |
7999 | { |
8000 | Elf_Internal_Rela *internal_relocs; | |
8001 | xtensa_relax_info *relax_info; | |
8002 | bfd_byte *contents; | |
8003 | bfd_boolean ok = TRUE; | |
8004 | unsigned i; | |
43cd72b9 BW |
8005 | bfd_boolean rv = FALSE; |
8006 | bfd_boolean virtual_action; | |
8007 | bfd_size_type sec_size; | |
e0001a05 | 8008 | |
43cd72b9 | 8009 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8010 | relax_info = get_xtensa_relax_info (sec); |
8011 | BFD_ASSERT (relax_info); | |
8012 | ||
43cd72b9 BW |
8013 | /* First translate any of the fixes that have been added already. */ |
8014 | translate_section_fixes (sec); | |
8015 | ||
e0001a05 NC |
8016 | /* Handle property sections (e.g., literal tables) specially. */ |
8017 | if (xtensa_is_property_section (sec)) | |
8018 | { | |
8019 | BFD_ASSERT (!relax_info->is_relaxable_literal_section); | |
8020 | return relax_property_section (abfd, sec, link_info); | |
8021 | } | |
8022 | ||
43cd72b9 BW |
8023 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8024 | link_info->keep_memory); | |
8025 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
8026 | if (contents == NULL && sec_size != 0) | |
8027 | { | |
8028 | ok = FALSE; | |
8029 | goto error_return; | |
8030 | } | |
8031 | ||
8032 | if (internal_relocs) | |
8033 | { | |
8034 | for (i = 0; i < sec->reloc_count; i++) | |
8035 | { | |
8036 | Elf_Internal_Rela *irel; | |
8037 | xtensa_relax_info *target_relax_info; | |
8038 | bfd_vma source_offset, old_source_offset; | |
8039 | r_reloc r_rel; | |
8040 | unsigned r_type; | |
8041 | asection *target_sec; | |
8042 | ||
8043 | /* Locally change the source address. | |
8044 | Translate the target to the new target address. | |
8045 | If it points to this section and has been removed, | |
8046 | NULLify it. | |
8047 | Write it back. */ | |
8048 | ||
8049 | irel = &internal_relocs[i]; | |
8050 | source_offset = irel->r_offset; | |
8051 | old_source_offset = source_offset; | |
8052 | ||
8053 | r_type = ELF32_R_TYPE (irel->r_info); | |
8054 | r_reloc_init (&r_rel, abfd, irel, contents, | |
8055 | bfd_get_section_limit (abfd, sec)); | |
8056 | ||
8057 | /* If this section could have changed then we may need to | |
8058 | change the relocation's offset. */ | |
8059 | ||
8060 | if (relax_info->is_relaxable_literal_section | |
8061 | || relax_info->is_relaxable_asm_section) | |
8062 | { | |
8063 | if (r_type != R_XTENSA_NONE | |
8064 | && find_removed_literal (&relax_info->removed_list, | |
8065 | irel->r_offset)) | |
8066 | { | |
8067 | /* Remove this relocation. */ | |
8068 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8069 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8070 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8071 | irel->r_offset = offset_with_removed_text | |
8072 | (&relax_info->action_list, irel->r_offset); | |
8073 | pin_internal_relocs (sec, internal_relocs); | |
8074 | continue; | |
8075 | } | |
8076 | ||
8077 | if (r_type == R_XTENSA_ASM_SIMPLIFY) | |
8078 | { | |
8079 | text_action *action = | |
8080 | find_insn_action (&relax_info->action_list, | |
8081 | irel->r_offset); | |
8082 | if (action && (action->action == ta_convert_longcall | |
8083 | || action->action == ta_remove_longcall)) | |
8084 | { | |
8085 | bfd_reloc_status_type retval; | |
8086 | char *error_message = NULL; | |
8087 | ||
8088 | retval = contract_asm_expansion (contents, sec_size, | |
8089 | irel, &error_message); | |
8090 | if (retval != bfd_reloc_ok) | |
8091 | { | |
8092 | (*link_info->callbacks->reloc_dangerous) | |
8093 | (link_info, error_message, abfd, sec, | |
8094 | irel->r_offset); | |
8095 | goto error_return; | |
8096 | } | |
8097 | /* Update the action so that the code that moves | |
8098 | the contents will do the right thing. */ | |
8099 | if (action->action == ta_remove_longcall) | |
8100 | action->action = ta_remove_insn; | |
8101 | else | |
8102 | action->action = ta_none; | |
8103 | /* Refresh the info in the r_rel. */ | |
8104 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8105 | r_type = ELF32_R_TYPE (irel->r_info); | |
8106 | } | |
8107 | } | |
8108 | ||
8109 | source_offset = offset_with_removed_text | |
8110 | (&relax_info->action_list, irel->r_offset); | |
8111 | irel->r_offset = source_offset; | |
8112 | } | |
8113 | ||
8114 | /* If the target section could have changed then | |
8115 | we may need to change the relocation's target offset. */ | |
8116 | ||
8117 | target_sec = r_reloc_get_section (&r_rel); | |
8118 | target_relax_info = get_xtensa_relax_info (target_sec); | |
8119 | ||
8120 | if (target_relax_info | |
8121 | && (target_relax_info->is_relaxable_literal_section | |
8122 | || target_relax_info->is_relaxable_asm_section)) | |
8123 | { | |
8124 | r_reloc new_reloc; | |
8125 | reloc_bfd_fix *fix; | |
8126 | bfd_vma addend_displacement; | |
8127 | ||
8128 | translate_reloc (&r_rel, &new_reloc); | |
8129 | ||
8130 | if (r_type == R_XTENSA_DIFF8 | |
8131 | || r_type == R_XTENSA_DIFF16 | |
8132 | || r_type == R_XTENSA_DIFF32) | |
8133 | { | |
8134 | bfd_vma diff_value = 0, new_end_offset, diff_mask = 0; | |
8135 | ||
8136 | if (bfd_get_section_limit (abfd, sec) < old_source_offset) | |
8137 | { | |
8138 | (*link_info->callbacks->reloc_dangerous) | |
8139 | (link_info, _("invalid relocation address"), | |
8140 | abfd, sec, old_source_offset); | |
8141 | goto error_return; | |
8142 | } | |
8143 | ||
8144 | switch (r_type) | |
8145 | { | |
8146 | case R_XTENSA_DIFF8: | |
8147 | diff_value = | |
8148 | bfd_get_8 (abfd, &contents[old_source_offset]); | |
8149 | break; | |
8150 | case R_XTENSA_DIFF16: | |
8151 | diff_value = | |
8152 | bfd_get_16 (abfd, &contents[old_source_offset]); | |
8153 | break; | |
8154 | case R_XTENSA_DIFF32: | |
8155 | diff_value = | |
8156 | bfd_get_32 (abfd, &contents[old_source_offset]); | |
8157 | break; | |
8158 | } | |
8159 | ||
8160 | new_end_offset = offset_with_removed_text | |
8161 | (&target_relax_info->action_list, | |
8162 | r_rel.target_offset + diff_value); | |
8163 | diff_value = new_end_offset - new_reloc.target_offset; | |
8164 | ||
8165 | switch (r_type) | |
8166 | { | |
8167 | case R_XTENSA_DIFF8: | |
8168 | diff_mask = 0xff; | |
8169 | bfd_put_8 (abfd, diff_value, | |
8170 | &contents[old_source_offset]); | |
8171 | break; | |
8172 | case R_XTENSA_DIFF16: | |
8173 | diff_mask = 0xffff; | |
8174 | bfd_put_16 (abfd, diff_value, | |
8175 | &contents[old_source_offset]); | |
8176 | break; | |
8177 | case R_XTENSA_DIFF32: | |
8178 | diff_mask = 0xffffffff; | |
8179 | bfd_put_32 (abfd, diff_value, | |
8180 | &contents[old_source_offset]); | |
8181 | break; | |
8182 | } | |
8183 | ||
8184 | /* Check for overflow. */ | |
8185 | if ((diff_value & ~diff_mask) != 0) | |
8186 | { | |
8187 | (*link_info->callbacks->reloc_dangerous) | |
8188 | (link_info, _("overflow after relaxation"), | |
8189 | abfd, sec, old_source_offset); | |
8190 | goto error_return; | |
8191 | } | |
8192 | ||
8193 | pin_contents (sec, contents); | |
8194 | } | |
8195 | ||
8196 | /* FIXME: If the relocation still references a section in | |
8197 | the same input file, the relocation should be modified | |
8198 | directly instead of adding a "fix" record. */ | |
8199 | ||
8200 | addend_displacement = | |
8201 | new_reloc.target_offset + new_reloc.virtual_offset; | |
8202 | ||
8203 | fix = reloc_bfd_fix_init (sec, source_offset, r_type, 0, | |
8204 | r_reloc_get_section (&new_reloc), | |
8205 | addend_displacement, TRUE); | |
8206 | add_fix (sec, fix); | |
8207 | } | |
8208 | ||
8209 | pin_internal_relocs (sec, internal_relocs); | |
8210 | } | |
8211 | } | |
8212 | ||
8213 | if ((relax_info->is_relaxable_literal_section | |
8214 | || relax_info->is_relaxable_asm_section) | |
8215 | && relax_info->action_list.head) | |
8216 | { | |
8217 | /* Walk through the planned actions and build up a table | |
8218 | of move, copy and fill records. Use the move, copy and | |
8219 | fill records to perform the actions once. */ | |
8220 | ||
8221 | bfd_size_type size = sec->size; | |
8222 | int removed = 0; | |
8223 | bfd_size_type final_size, copy_size, orig_insn_size; | |
8224 | bfd_byte *scratch = NULL; | |
8225 | bfd_byte *dup_contents = NULL; | |
8226 | bfd_size_type orig_size = size; | |
8227 | bfd_vma orig_dot = 0; | |
8228 | bfd_vma orig_dot_copied = 0; /* Byte copied already from | |
8229 | orig dot in physical memory. */ | |
8230 | bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */ | |
8231 | bfd_vma dup_dot = 0; | |
8232 | ||
8233 | text_action *action = relax_info->action_list.head; | |
8234 | ||
8235 | final_size = sec->size; | |
8236 | for (action = relax_info->action_list.head; action; | |
8237 | action = action->next) | |
8238 | { | |
8239 | final_size -= action->removed_bytes; | |
8240 | } | |
8241 | ||
8242 | scratch = (bfd_byte *) bfd_zmalloc (final_size); | |
8243 | dup_contents = (bfd_byte *) bfd_zmalloc (final_size); | |
8244 | ||
8245 | /* The dot is the current fill location. */ | |
8246 | #if DEBUG | |
8247 | print_action_list (stderr, &relax_info->action_list); | |
8248 | #endif | |
8249 | ||
8250 | for (action = relax_info->action_list.head; action; | |
8251 | action = action->next) | |
8252 | { | |
8253 | virtual_action = FALSE; | |
8254 | if (action->offset > orig_dot) | |
8255 | { | |
8256 | orig_dot += orig_dot_copied; | |
8257 | orig_dot_copied = 0; | |
8258 | orig_dot_vo = 0; | |
8259 | /* Out of the virtual world. */ | |
8260 | } | |
8261 | ||
8262 | if (action->offset > orig_dot) | |
8263 | { | |
8264 | copy_size = action->offset - orig_dot; | |
8265 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
8266 | orig_dot += copy_size; | |
8267 | dup_dot += copy_size; | |
8268 | BFD_ASSERT (action->offset == orig_dot); | |
8269 | } | |
8270 | else if (action->offset < orig_dot) | |
8271 | { | |
8272 | if (action->action == ta_fill | |
8273 | && action->offset - action->removed_bytes == orig_dot) | |
8274 | { | |
8275 | /* This is OK because the fill only effects the dup_dot. */ | |
8276 | } | |
8277 | else if (action->action == ta_add_literal) | |
8278 | { | |
8279 | /* TBD. Might need to handle this. */ | |
8280 | } | |
8281 | } | |
8282 | if (action->offset == orig_dot) | |
8283 | { | |
8284 | if (action->virtual_offset > orig_dot_vo) | |
8285 | { | |
8286 | if (orig_dot_vo == 0) | |
8287 | { | |
8288 | /* Need to copy virtual_offset bytes. Probably four. */ | |
8289 | copy_size = action->virtual_offset - orig_dot_vo; | |
8290 | memmove (&dup_contents[dup_dot], | |
8291 | &contents[orig_dot], copy_size); | |
8292 | orig_dot_copied = copy_size; | |
8293 | dup_dot += copy_size; | |
8294 | } | |
8295 | virtual_action = TRUE; | |
8296 | } | |
8297 | else | |
8298 | BFD_ASSERT (action->virtual_offset <= orig_dot_vo); | |
8299 | } | |
8300 | switch (action->action) | |
8301 | { | |
8302 | case ta_remove_literal: | |
8303 | case ta_remove_insn: | |
8304 | BFD_ASSERT (action->removed_bytes >= 0); | |
8305 | orig_dot += action->removed_bytes; | |
8306 | break; | |
8307 | ||
8308 | case ta_narrow_insn: | |
8309 | orig_insn_size = 3; | |
8310 | copy_size = 2; | |
8311 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
8312 | BFD_ASSERT (action->removed_bytes == 1); | |
64b607e6 | 8313 | rv = narrow_instruction (scratch, final_size, 0); |
43cd72b9 BW |
8314 | BFD_ASSERT (rv); |
8315 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
8316 | orig_dot += orig_insn_size; | |
8317 | dup_dot += copy_size; | |
8318 | break; | |
8319 | ||
8320 | case ta_fill: | |
8321 | if (action->removed_bytes >= 0) | |
8322 | orig_dot += action->removed_bytes; | |
8323 | else | |
8324 | { | |
8325 | /* Already zeroed in dup_contents. Just bump the | |
8326 | counters. */ | |
8327 | dup_dot += (-action->removed_bytes); | |
8328 | } | |
8329 | break; | |
8330 | ||
8331 | case ta_none: | |
8332 | BFD_ASSERT (action->removed_bytes == 0); | |
8333 | break; | |
8334 | ||
8335 | case ta_convert_longcall: | |
8336 | case ta_remove_longcall: | |
8337 | /* These will be removed or converted before we get here. */ | |
8338 | BFD_ASSERT (0); | |
8339 | break; | |
8340 | ||
8341 | case ta_widen_insn: | |
8342 | orig_insn_size = 2; | |
8343 | copy_size = 3; | |
8344 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
8345 | BFD_ASSERT (action->removed_bytes == -1); | |
64b607e6 | 8346 | rv = widen_instruction (scratch, final_size, 0); |
43cd72b9 BW |
8347 | BFD_ASSERT (rv); |
8348 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
8349 | orig_dot += orig_insn_size; | |
8350 | dup_dot += copy_size; | |
8351 | break; | |
8352 | ||
8353 | case ta_add_literal: | |
8354 | orig_insn_size = 0; | |
8355 | copy_size = 4; | |
8356 | BFD_ASSERT (action->removed_bytes == -4); | |
8357 | /* TBD -- place the literal value here and insert | |
8358 | into the table. */ | |
8359 | memset (&dup_contents[dup_dot], 0, 4); | |
8360 | pin_internal_relocs (sec, internal_relocs); | |
8361 | pin_contents (sec, contents); | |
8362 | ||
8363 | if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents, | |
8364 | relax_info, &internal_relocs, &action->value)) | |
8365 | goto error_return; | |
8366 | ||
8367 | if (virtual_action) | |
8368 | orig_dot_vo += copy_size; | |
8369 | ||
8370 | orig_dot += orig_insn_size; | |
8371 | dup_dot += copy_size; | |
8372 | break; | |
8373 | ||
8374 | default: | |
8375 | /* Not implemented yet. */ | |
8376 | BFD_ASSERT (0); | |
8377 | break; | |
8378 | } | |
8379 | ||
8380 | size -= action->removed_bytes; | |
8381 | removed += action->removed_bytes; | |
8382 | BFD_ASSERT (dup_dot <= final_size); | |
8383 | BFD_ASSERT (orig_dot <= orig_size); | |
8384 | } | |
8385 | ||
8386 | orig_dot += orig_dot_copied; | |
8387 | orig_dot_copied = 0; | |
8388 | ||
8389 | if (orig_dot != orig_size) | |
8390 | { | |
8391 | copy_size = orig_size - orig_dot; | |
8392 | BFD_ASSERT (orig_size > orig_dot); | |
8393 | BFD_ASSERT (dup_dot + copy_size == final_size); | |
8394 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
8395 | orig_dot += copy_size; | |
8396 | dup_dot += copy_size; | |
8397 | } | |
8398 | BFD_ASSERT (orig_size == orig_dot); | |
8399 | BFD_ASSERT (final_size == dup_dot); | |
8400 | ||
8401 | /* Move the dup_contents back. */ | |
8402 | if (final_size > orig_size) | |
8403 | { | |
8404 | /* Contents need to be reallocated. Swap the dup_contents into | |
8405 | contents. */ | |
8406 | sec->contents = dup_contents; | |
8407 | free (contents); | |
8408 | contents = dup_contents; | |
8409 | pin_contents (sec, contents); | |
8410 | } | |
8411 | else | |
8412 | { | |
8413 | BFD_ASSERT (final_size <= orig_size); | |
8414 | memset (contents, 0, orig_size); | |
8415 | memcpy (contents, dup_contents, final_size); | |
8416 | free (dup_contents); | |
8417 | } | |
8418 | free (scratch); | |
8419 | pin_contents (sec, contents); | |
8420 | ||
8421 | sec->size = final_size; | |
8422 | } | |
8423 | ||
8424 | error_return: | |
8425 | release_internal_relocs (sec, internal_relocs); | |
8426 | release_contents (sec, contents); | |
8427 | return ok; | |
8428 | } | |
8429 | ||
8430 | ||
8431 | static bfd_boolean | |
7fa3d080 | 8432 | translate_section_fixes (asection *sec) |
43cd72b9 BW |
8433 | { |
8434 | xtensa_relax_info *relax_info; | |
8435 | reloc_bfd_fix *r; | |
8436 | ||
8437 | relax_info = get_xtensa_relax_info (sec); | |
8438 | if (!relax_info) | |
8439 | return TRUE; | |
8440 | ||
8441 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
8442 | if (!translate_reloc_bfd_fix (r)) | |
8443 | return FALSE; | |
e0001a05 | 8444 | |
43cd72b9 BW |
8445 | return TRUE; |
8446 | } | |
e0001a05 | 8447 | |
e0001a05 | 8448 | |
43cd72b9 BW |
8449 | /* Translate a fix given the mapping in the relax info for the target |
8450 | section. If it has already been translated, no work is required. */ | |
e0001a05 | 8451 | |
43cd72b9 | 8452 | static bfd_boolean |
7fa3d080 | 8453 | translate_reloc_bfd_fix (reloc_bfd_fix *fix) |
43cd72b9 BW |
8454 | { |
8455 | reloc_bfd_fix new_fix; | |
8456 | asection *sec; | |
8457 | xtensa_relax_info *relax_info; | |
8458 | removed_literal *removed; | |
8459 | bfd_vma new_offset, target_offset; | |
e0001a05 | 8460 | |
43cd72b9 BW |
8461 | if (fix->translated) |
8462 | return TRUE; | |
e0001a05 | 8463 | |
43cd72b9 BW |
8464 | sec = fix->target_sec; |
8465 | target_offset = fix->target_offset; | |
e0001a05 | 8466 | |
43cd72b9 BW |
8467 | relax_info = get_xtensa_relax_info (sec); |
8468 | if (!relax_info) | |
8469 | { | |
8470 | fix->translated = TRUE; | |
8471 | return TRUE; | |
8472 | } | |
e0001a05 | 8473 | |
43cd72b9 | 8474 | new_fix = *fix; |
e0001a05 | 8475 | |
43cd72b9 BW |
8476 | /* The fix does not need to be translated if the section cannot change. */ |
8477 | if (!relax_info->is_relaxable_literal_section | |
8478 | && !relax_info->is_relaxable_asm_section) | |
8479 | { | |
8480 | fix->translated = TRUE; | |
8481 | return TRUE; | |
8482 | } | |
e0001a05 | 8483 | |
43cd72b9 BW |
8484 | /* If the literal has been moved and this relocation was on an |
8485 | opcode, then the relocation should move to the new literal | |
8486 | location. Otherwise, the relocation should move within the | |
8487 | section. */ | |
8488 | ||
8489 | removed = FALSE; | |
8490 | if (is_operand_relocation (fix->src_type)) | |
8491 | { | |
8492 | /* Check if the original relocation is against a literal being | |
8493 | removed. */ | |
8494 | removed = find_removed_literal (&relax_info->removed_list, | |
8495 | target_offset); | |
e0001a05 NC |
8496 | } |
8497 | ||
43cd72b9 | 8498 | if (removed) |
e0001a05 | 8499 | { |
43cd72b9 | 8500 | asection *new_sec; |
e0001a05 | 8501 | |
43cd72b9 BW |
8502 | /* The fact that there is still a relocation to this literal indicates |
8503 | that the literal is being coalesced, not simply removed. */ | |
8504 | BFD_ASSERT (removed->to.abfd != NULL); | |
e0001a05 | 8505 | |
43cd72b9 BW |
8506 | /* This was moved to some other address (possibly another section). */ |
8507 | new_sec = r_reloc_get_section (&removed->to); | |
8508 | if (new_sec != sec) | |
e0001a05 | 8509 | { |
43cd72b9 BW |
8510 | sec = new_sec; |
8511 | relax_info = get_xtensa_relax_info (sec); | |
8512 | if (!relax_info || | |
8513 | (!relax_info->is_relaxable_literal_section | |
8514 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 | 8515 | { |
43cd72b9 BW |
8516 | target_offset = removed->to.target_offset; |
8517 | new_fix.target_sec = new_sec; | |
8518 | new_fix.target_offset = target_offset; | |
8519 | new_fix.translated = TRUE; | |
8520 | *fix = new_fix; | |
8521 | return TRUE; | |
e0001a05 | 8522 | } |
e0001a05 | 8523 | } |
43cd72b9 BW |
8524 | target_offset = removed->to.target_offset; |
8525 | new_fix.target_sec = new_sec; | |
e0001a05 | 8526 | } |
43cd72b9 BW |
8527 | |
8528 | /* The target address may have been moved within its section. */ | |
8529 | new_offset = offset_with_removed_text (&relax_info->action_list, | |
8530 | target_offset); | |
8531 | ||
8532 | new_fix.target_offset = new_offset; | |
8533 | new_fix.target_offset = new_offset; | |
8534 | new_fix.translated = TRUE; | |
8535 | *fix = new_fix; | |
8536 | return TRUE; | |
e0001a05 NC |
8537 | } |
8538 | ||
8539 | ||
8540 | /* Fix up a relocation to take account of removed literals. */ | |
8541 | ||
8542 | static void | |
7fa3d080 | 8543 | translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel) |
e0001a05 NC |
8544 | { |
8545 | asection *sec; | |
8546 | xtensa_relax_info *relax_info; | |
8547 | removed_literal *removed; | |
43cd72b9 | 8548 | bfd_vma new_offset, target_offset, removed_bytes; |
e0001a05 NC |
8549 | |
8550 | *new_rel = *orig_rel; | |
8551 | ||
8552 | if (!r_reloc_is_defined (orig_rel)) | |
8553 | return; | |
8554 | sec = r_reloc_get_section (orig_rel); | |
8555 | ||
8556 | relax_info = get_xtensa_relax_info (sec); | |
8557 | BFD_ASSERT (relax_info); | |
8558 | ||
43cd72b9 BW |
8559 | if (!relax_info->is_relaxable_literal_section |
8560 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
8561 | return; |
8562 | ||
43cd72b9 BW |
8563 | target_offset = orig_rel->target_offset; |
8564 | ||
8565 | removed = FALSE; | |
8566 | if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info))) | |
8567 | { | |
8568 | /* Check if the original relocation is against a literal being | |
8569 | removed. */ | |
8570 | removed = find_removed_literal (&relax_info->removed_list, | |
8571 | target_offset); | |
8572 | } | |
8573 | if (removed && removed->to.abfd) | |
e0001a05 NC |
8574 | { |
8575 | asection *new_sec; | |
8576 | ||
8577 | /* The fact that there is still a relocation to this literal indicates | |
8578 | that the literal is being coalesced, not simply removed. */ | |
8579 | BFD_ASSERT (removed->to.abfd != NULL); | |
8580 | ||
43cd72b9 BW |
8581 | /* This was moved to some other address |
8582 | (possibly in another section). */ | |
e0001a05 NC |
8583 | *new_rel = removed->to; |
8584 | new_sec = r_reloc_get_section (new_rel); | |
43cd72b9 | 8585 | if (new_sec != sec) |
e0001a05 NC |
8586 | { |
8587 | sec = new_sec; | |
8588 | relax_info = get_xtensa_relax_info (sec); | |
43cd72b9 BW |
8589 | if (!relax_info |
8590 | || (!relax_info->is_relaxable_literal_section | |
8591 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 NC |
8592 | return; |
8593 | } | |
43cd72b9 | 8594 | target_offset = new_rel->target_offset; |
e0001a05 NC |
8595 | } |
8596 | ||
8597 | /* ...and the target address may have been moved within its section. */ | |
43cd72b9 BW |
8598 | new_offset = offset_with_removed_text (&relax_info->action_list, |
8599 | target_offset); | |
e0001a05 NC |
8600 | |
8601 | /* Modify the offset and addend. */ | |
43cd72b9 | 8602 | removed_bytes = target_offset - new_offset; |
e0001a05 | 8603 | new_rel->target_offset = new_offset; |
43cd72b9 | 8604 | new_rel->rela.r_addend -= removed_bytes; |
e0001a05 NC |
8605 | } |
8606 | ||
8607 | ||
8608 | /* For dynamic links, there may be a dynamic relocation for each | |
8609 | literal. The number of dynamic relocations must be computed in | |
8610 | size_dynamic_sections, which occurs before relaxation. When a | |
8611 | literal is removed, this function checks if there is a corresponding | |
8612 | dynamic relocation and shrinks the size of the appropriate dynamic | |
8613 | relocation section accordingly. At this point, the contents of the | |
8614 | dynamic relocation sections have not yet been filled in, so there's | |
8615 | nothing else that needs to be done. */ | |
8616 | ||
8617 | static void | |
7fa3d080 BW |
8618 | shrink_dynamic_reloc_sections (struct bfd_link_info *info, |
8619 | bfd *abfd, | |
8620 | asection *input_section, | |
8621 | Elf_Internal_Rela *rel) | |
e0001a05 | 8622 | { |
f0e6fdb2 | 8623 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
8624 | Elf_Internal_Shdr *symtab_hdr; |
8625 | struct elf_link_hash_entry **sym_hashes; | |
8626 | unsigned long r_symndx; | |
8627 | int r_type; | |
8628 | struct elf_link_hash_entry *h; | |
8629 | bfd_boolean dynamic_symbol; | |
8630 | ||
f0e6fdb2 | 8631 | htab = elf_xtensa_hash_table (info); |
e0001a05 NC |
8632 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
8633 | sym_hashes = elf_sym_hashes (abfd); | |
8634 | ||
8635 | r_type = ELF32_R_TYPE (rel->r_info); | |
8636 | r_symndx = ELF32_R_SYM (rel->r_info); | |
8637 | ||
8638 | if (r_symndx < symtab_hdr->sh_info) | |
8639 | h = NULL; | |
8640 | else | |
8641 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
8642 | ||
4608f3d9 | 8643 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 NC |
8644 | |
8645 | if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
8646 | && (input_section->flags & SEC_ALLOC) != 0 | |
8647 | && (dynamic_symbol || info->shared)) | |
8648 | { | |
e0001a05 NC |
8649 | asection *srel; |
8650 | bfd_boolean is_plt = FALSE; | |
8651 | ||
e0001a05 NC |
8652 | if (dynamic_symbol && r_type == R_XTENSA_PLT) |
8653 | { | |
f0e6fdb2 | 8654 | srel = htab->srelplt; |
e0001a05 NC |
8655 | is_plt = TRUE; |
8656 | } | |
8657 | else | |
f0e6fdb2 | 8658 | srel = htab->srelgot; |
e0001a05 NC |
8659 | |
8660 | /* Reduce size of the .rela.* section by one reloc. */ | |
e0001a05 | 8661 | BFD_ASSERT (srel != NULL); |
eea6121a AM |
8662 | BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela)); |
8663 | srel->size -= sizeof (Elf32_External_Rela); | |
e0001a05 NC |
8664 | |
8665 | if (is_plt) | |
8666 | { | |
8667 | asection *splt, *sgotplt, *srelgot; | |
8668 | int reloc_index, chunk; | |
8669 | ||
8670 | /* Find the PLT reloc index of the entry being removed. This | |
8671 | is computed from the size of ".rela.plt". It is needed to | |
8672 | figure out which PLT chunk to resize. Usually "last index | |
8673 | = size - 1" since the index starts at zero, but in this | |
8674 | context, the size has just been decremented so there's no | |
8675 | need to subtract one. */ | |
eea6121a | 8676 | reloc_index = srel->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
8677 | |
8678 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
8679 | splt = elf_xtensa_get_plt_section (info, chunk); |
8680 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
8681 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
8682 | ||
8683 | /* Check if an entire PLT chunk has just been eliminated. */ | |
8684 | if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0) | |
8685 | { | |
8686 | /* The two magic GOT entries for that chunk can go away. */ | |
f0e6fdb2 | 8687 | srelgot = htab->srelgot; |
e0001a05 NC |
8688 | BFD_ASSERT (srelgot != NULL); |
8689 | srelgot->reloc_count -= 2; | |
eea6121a AM |
8690 | srelgot->size -= 2 * sizeof (Elf32_External_Rela); |
8691 | sgotplt->size -= 8; | |
e0001a05 NC |
8692 | |
8693 | /* There should be only one entry left (and it will be | |
8694 | removed below). */ | |
eea6121a AM |
8695 | BFD_ASSERT (sgotplt->size == 4); |
8696 | BFD_ASSERT (splt->size == PLT_ENTRY_SIZE); | |
e0001a05 NC |
8697 | } |
8698 | ||
eea6121a AM |
8699 | BFD_ASSERT (sgotplt->size >= 4); |
8700 | BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE); | |
e0001a05 | 8701 | |
eea6121a AM |
8702 | sgotplt->size -= 4; |
8703 | splt->size -= PLT_ENTRY_SIZE; | |
e0001a05 NC |
8704 | } |
8705 | } | |
8706 | } | |
8707 | ||
8708 | ||
43cd72b9 BW |
8709 | /* Take an r_rel and move it to another section. This usually |
8710 | requires extending the interal_relocation array and pinning it. If | |
8711 | the original r_rel is from the same BFD, we can complete this here. | |
8712 | Otherwise, we add a fix record to let the final link fix the | |
8713 | appropriate address. Contents and internal relocations for the | |
8714 | section must be pinned after calling this routine. */ | |
8715 | ||
8716 | static bfd_boolean | |
7fa3d080 BW |
8717 | move_literal (bfd *abfd, |
8718 | struct bfd_link_info *link_info, | |
8719 | asection *sec, | |
8720 | bfd_vma offset, | |
8721 | bfd_byte *contents, | |
8722 | xtensa_relax_info *relax_info, | |
8723 | Elf_Internal_Rela **internal_relocs_p, | |
8724 | const literal_value *lit) | |
43cd72b9 BW |
8725 | { |
8726 | Elf_Internal_Rela *new_relocs = NULL; | |
8727 | size_t new_relocs_count = 0; | |
8728 | Elf_Internal_Rela this_rela; | |
8729 | const r_reloc *r_rel; | |
8730 | ||
8731 | r_rel = &lit->r_rel; | |
8732 | BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p); | |
8733 | ||
8734 | if (r_reloc_is_const (r_rel)) | |
8735 | bfd_put_32 (abfd, lit->value, contents + offset); | |
8736 | else | |
8737 | { | |
8738 | int r_type; | |
8739 | unsigned i; | |
8740 | asection *target_sec; | |
8741 | reloc_bfd_fix *fix; | |
8742 | unsigned insert_at; | |
8743 | ||
8744 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
8745 | target_sec = r_reloc_get_section (r_rel); | |
8746 | ||
8747 | /* This is the difficult case. We have to create a fix up. */ | |
8748 | this_rela.r_offset = offset; | |
8749 | this_rela.r_info = ELF32_R_INFO (0, r_type); | |
8750 | this_rela.r_addend = | |
8751 | r_rel->target_offset - r_reloc_get_target_offset (r_rel); | |
8752 | bfd_put_32 (abfd, lit->value, contents + offset); | |
8753 | ||
8754 | /* Currently, we cannot move relocations during a relocatable link. */ | |
8755 | BFD_ASSERT (!link_info->relocatable); | |
8756 | fix = reloc_bfd_fix_init (sec, offset, r_type, r_rel->abfd, | |
8757 | r_reloc_get_section (r_rel), | |
8758 | r_rel->target_offset + r_rel->virtual_offset, | |
8759 | FALSE); | |
8760 | /* We also need to mark that relocations are needed here. */ | |
8761 | sec->flags |= SEC_RELOC; | |
8762 | ||
8763 | translate_reloc_bfd_fix (fix); | |
8764 | /* This fix has not yet been translated. */ | |
8765 | add_fix (sec, fix); | |
8766 | ||
8767 | /* Add the relocation. If we have already allocated our own | |
8768 | space for the relocations and we have room for more, then use | |
8769 | it. Otherwise, allocate new space and move the literals. */ | |
8770 | insert_at = sec->reloc_count; | |
8771 | for (i = 0; i < sec->reloc_count; ++i) | |
8772 | { | |
8773 | if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset) | |
8774 | { | |
8775 | insert_at = i; | |
8776 | break; | |
8777 | } | |
8778 | } | |
8779 | ||
8780 | if (*internal_relocs_p != relax_info->allocated_relocs | |
8781 | || sec->reloc_count + 1 > relax_info->allocated_relocs_count) | |
8782 | { | |
8783 | BFD_ASSERT (relax_info->allocated_relocs == NULL | |
8784 | || sec->reloc_count == relax_info->relocs_count); | |
8785 | ||
8786 | if (relax_info->allocated_relocs_count == 0) | |
8787 | new_relocs_count = (sec->reloc_count + 2) * 2; | |
8788 | else | |
8789 | new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2; | |
8790 | ||
8791 | new_relocs = (Elf_Internal_Rela *) | |
8792 | bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count)); | |
8793 | if (!new_relocs) | |
8794 | return FALSE; | |
8795 | ||
8796 | /* We could handle this more quickly by finding the split point. */ | |
8797 | if (insert_at != 0) | |
8798 | memcpy (new_relocs, *internal_relocs_p, | |
8799 | insert_at * sizeof (Elf_Internal_Rela)); | |
8800 | ||
8801 | new_relocs[insert_at] = this_rela; | |
8802 | ||
8803 | if (insert_at != sec->reloc_count) | |
8804 | memcpy (new_relocs + insert_at + 1, | |
8805 | (*internal_relocs_p) + insert_at, | |
8806 | (sec->reloc_count - insert_at) | |
8807 | * sizeof (Elf_Internal_Rela)); | |
8808 | ||
8809 | if (*internal_relocs_p != relax_info->allocated_relocs) | |
8810 | { | |
8811 | /* The first time we re-allocate, we can only free the | |
8812 | old relocs if they were allocated with bfd_malloc. | |
8813 | This is not true when keep_memory is in effect. */ | |
8814 | if (!link_info->keep_memory) | |
8815 | free (*internal_relocs_p); | |
8816 | } | |
8817 | else | |
8818 | free (*internal_relocs_p); | |
8819 | relax_info->allocated_relocs = new_relocs; | |
8820 | relax_info->allocated_relocs_count = new_relocs_count; | |
8821 | elf_section_data (sec)->relocs = new_relocs; | |
8822 | sec->reloc_count++; | |
8823 | relax_info->relocs_count = sec->reloc_count; | |
8824 | *internal_relocs_p = new_relocs; | |
8825 | } | |
8826 | else | |
8827 | { | |
8828 | if (insert_at != sec->reloc_count) | |
8829 | { | |
8830 | unsigned idx; | |
8831 | for (idx = sec->reloc_count; idx > insert_at; idx--) | |
8832 | (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1]; | |
8833 | } | |
8834 | (*internal_relocs_p)[insert_at] = this_rela; | |
8835 | sec->reloc_count++; | |
8836 | if (relax_info->allocated_relocs) | |
8837 | relax_info->relocs_count = sec->reloc_count; | |
8838 | } | |
8839 | } | |
8840 | return TRUE; | |
8841 | } | |
8842 | ||
8843 | ||
e0001a05 NC |
8844 | /* This is similar to relax_section except that when a target is moved, |
8845 | we shift addresses up. We also need to modify the size. This | |
8846 | algorithm does NOT allow for relocations into the middle of the | |
8847 | property sections. */ | |
8848 | ||
43cd72b9 | 8849 | static bfd_boolean |
7fa3d080 BW |
8850 | relax_property_section (bfd *abfd, |
8851 | asection *sec, | |
8852 | struct bfd_link_info *link_info) | |
e0001a05 NC |
8853 | { |
8854 | Elf_Internal_Rela *internal_relocs; | |
8855 | bfd_byte *contents; | |
1d25768e | 8856 | unsigned i; |
e0001a05 | 8857 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
8858 | bfd_boolean is_full_prop_section; |
8859 | size_t last_zfill_target_offset = 0; | |
8860 | asection *last_zfill_target_sec = NULL; | |
8861 | bfd_size_type sec_size; | |
1d25768e | 8862 | bfd_size_type entry_size; |
e0001a05 | 8863 | |
43cd72b9 | 8864 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
8865 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
8866 | link_info->keep_memory); | |
8867 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 8868 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
8869 | { |
8870 | ok = FALSE; | |
8871 | goto error_return; | |
8872 | } | |
8873 | ||
1d25768e BW |
8874 | is_full_prop_section = xtensa_is_proptable_section (sec); |
8875 | if (is_full_prop_section) | |
8876 | entry_size = 12; | |
8877 | else | |
8878 | entry_size = 8; | |
43cd72b9 BW |
8879 | |
8880 | if (internal_relocs) | |
e0001a05 | 8881 | { |
43cd72b9 | 8882 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
8883 | { |
8884 | Elf_Internal_Rela *irel; | |
8885 | xtensa_relax_info *target_relax_info; | |
e0001a05 NC |
8886 | unsigned r_type; |
8887 | asection *target_sec; | |
43cd72b9 BW |
8888 | literal_value val; |
8889 | bfd_byte *size_p, *flags_p; | |
e0001a05 NC |
8890 | |
8891 | /* Locally change the source address. | |
8892 | Translate the target to the new target address. | |
8893 | If it points to this section and has been removed, MOVE IT. | |
8894 | Also, don't forget to modify the associated SIZE at | |
8895 | (offset + 4). */ | |
8896 | ||
8897 | irel = &internal_relocs[i]; | |
8898 | r_type = ELF32_R_TYPE (irel->r_info); | |
8899 | if (r_type == R_XTENSA_NONE) | |
8900 | continue; | |
8901 | ||
43cd72b9 BW |
8902 | /* Find the literal value. */ |
8903 | r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size); | |
8904 | size_p = &contents[irel->r_offset + 4]; | |
8905 | flags_p = NULL; | |
8906 | if (is_full_prop_section) | |
1d25768e BW |
8907 | flags_p = &contents[irel->r_offset + 8]; |
8908 | BFD_ASSERT (irel->r_offset + entry_size <= sec_size); | |
e0001a05 | 8909 | |
43cd72b9 | 8910 | target_sec = r_reloc_get_section (&val.r_rel); |
e0001a05 NC |
8911 | target_relax_info = get_xtensa_relax_info (target_sec); |
8912 | ||
8913 | if (target_relax_info | |
43cd72b9 BW |
8914 | && (target_relax_info->is_relaxable_literal_section |
8915 | || target_relax_info->is_relaxable_asm_section )) | |
e0001a05 NC |
8916 | { |
8917 | /* Translate the relocation's destination. */ | |
43cd72b9 | 8918 | bfd_vma new_offset, new_end_offset; |
e0001a05 NC |
8919 | long old_size, new_size; |
8920 | ||
43cd72b9 BW |
8921 | new_offset = offset_with_removed_text |
8922 | (&target_relax_info->action_list, val.r_rel.target_offset); | |
e0001a05 NC |
8923 | |
8924 | /* Assert that we are not out of bounds. */ | |
43cd72b9 BW |
8925 | old_size = bfd_get_32 (abfd, size_p); |
8926 | ||
8927 | if (old_size == 0) | |
8928 | { | |
8929 | /* Only the first zero-sized unreachable entry is | |
8930 | allowed to expand. In this case the new offset | |
8931 | should be the offset before the fill and the new | |
8932 | size is the expansion size. For other zero-sized | |
8933 | entries the resulting size should be zero with an | |
8934 | offset before or after the fill address depending | |
8935 | on whether the expanding unreachable entry | |
8936 | preceeds it. */ | |
8937 | if (last_zfill_target_sec | |
8938 | && last_zfill_target_sec == target_sec | |
8939 | && last_zfill_target_offset == val.r_rel.target_offset) | |
8940 | new_end_offset = new_offset; | |
8941 | else | |
8942 | { | |
8943 | new_end_offset = new_offset; | |
8944 | new_offset = offset_with_removed_text_before_fill | |
8945 | (&target_relax_info->action_list, | |
8946 | val.r_rel.target_offset); | |
8947 | ||
8948 | /* If it is not unreachable and we have not yet | |
8949 | seen an unreachable at this address, place it | |
8950 | before the fill address. */ | |
8951 | if (!flags_p | |
8952 | || (bfd_get_32 (abfd, flags_p) | |
8953 | & XTENSA_PROP_UNREACHABLE) == 0) | |
8954 | new_end_offset = new_offset; | |
8955 | else | |
8956 | { | |
8957 | last_zfill_target_sec = target_sec; | |
8958 | last_zfill_target_offset = val.r_rel.target_offset; | |
8959 | } | |
8960 | } | |
8961 | } | |
8962 | else | |
8963 | { | |
8964 | new_end_offset = offset_with_removed_text_before_fill | |
8965 | (&target_relax_info->action_list, | |
8966 | val.r_rel.target_offset + old_size); | |
8967 | } | |
e0001a05 | 8968 | |
e0001a05 | 8969 | new_size = new_end_offset - new_offset; |
43cd72b9 | 8970 | |
e0001a05 NC |
8971 | if (new_size != old_size) |
8972 | { | |
8973 | bfd_put_32 (abfd, new_size, size_p); | |
8974 | pin_contents (sec, contents); | |
8975 | } | |
43cd72b9 BW |
8976 | |
8977 | if (new_offset != val.r_rel.target_offset) | |
e0001a05 | 8978 | { |
43cd72b9 | 8979 | bfd_vma diff = new_offset - val.r_rel.target_offset; |
e0001a05 NC |
8980 | irel->r_addend += diff; |
8981 | pin_internal_relocs (sec, internal_relocs); | |
8982 | } | |
8983 | } | |
8984 | } | |
8985 | } | |
8986 | ||
8987 | /* Combine adjacent property table entries. This is also done in | |
8988 | finish_dynamic_sections() but at that point it's too late to | |
8989 | reclaim the space in the output section, so we do this twice. */ | |
8990 | ||
43cd72b9 | 8991 | if (internal_relocs && (!link_info->relocatable |
1d25768e | 8992 | || xtensa_is_littable_section (sec))) |
e0001a05 NC |
8993 | { |
8994 | Elf_Internal_Rela *last_irel = NULL; | |
1d25768e | 8995 | Elf_Internal_Rela *irel, *next_rel, *rel_end; |
e0001a05 | 8996 | int removed_bytes = 0; |
1d25768e | 8997 | bfd_vma offset; |
e0001a05 | 8998 | bfd_vma section_size; |
43cd72b9 BW |
8999 | flagword predef_flags; |
9000 | ||
43cd72b9 | 9001 | predef_flags = xtensa_get_property_predef_flags (sec); |
e0001a05 | 9002 | |
1d25768e | 9003 | /* Walk over memory and relocations at the same time. |
e0001a05 NC |
9004 | This REQUIRES that the internal_relocs be sorted by offset. */ |
9005 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
9006 | internal_reloc_compare); | |
e0001a05 NC |
9007 | |
9008 | pin_internal_relocs (sec, internal_relocs); | |
9009 | pin_contents (sec, contents); | |
9010 | ||
1d25768e BW |
9011 | next_rel = internal_relocs; |
9012 | rel_end = internal_relocs + sec->reloc_count; | |
9013 | ||
eea6121a | 9014 | section_size = sec->size; |
43cd72b9 | 9015 | BFD_ASSERT (section_size % entry_size == 0); |
e0001a05 | 9016 | |
43cd72b9 | 9017 | for (offset = 0; offset < section_size; offset += entry_size) |
e0001a05 | 9018 | { |
1d25768e | 9019 | Elf_Internal_Rela *offset_rel, *extra_rel; |
e0001a05 | 9020 | bfd_vma bytes_to_remove, size, actual_offset; |
1d25768e | 9021 | bfd_boolean remove_this_rel; |
43cd72b9 | 9022 | flagword flags; |
e0001a05 | 9023 | |
1d25768e BW |
9024 | /* Find the first relocation for the entry at the current offset. |
9025 | Adjust the offsets of any extra relocations for the previous | |
9026 | entry. */ | |
9027 | offset_rel = NULL; | |
9028 | if (next_rel) | |
9029 | { | |
9030 | for (irel = next_rel; irel < rel_end; irel++) | |
9031 | { | |
9032 | if ((irel->r_offset == offset | |
9033 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) | |
9034 | || irel->r_offset > offset) | |
9035 | { | |
9036 | offset_rel = irel; | |
9037 | break; | |
9038 | } | |
9039 | irel->r_offset -= removed_bytes; | |
9040 | irel++; | |
9041 | } | |
9042 | } | |
e0001a05 | 9043 | |
1d25768e BW |
9044 | /* Find the next relocation (if there are any left). */ |
9045 | extra_rel = NULL; | |
9046 | if (offset_rel) | |
e0001a05 | 9047 | { |
1d25768e | 9048 | for (irel = offset_rel + 1; irel < rel_end; irel++) |
e0001a05 | 9049 | { |
1d25768e BW |
9050 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) |
9051 | { | |
9052 | extra_rel = irel; | |
9053 | break; | |
9054 | } | |
e0001a05 | 9055 | } |
e0001a05 NC |
9056 | } |
9057 | ||
1d25768e BW |
9058 | /* Check if there are relocations on the current entry. There |
9059 | should usually be a relocation on the offset field. If there | |
9060 | are relocations on the size or flags, then we can't optimize | |
9061 | this entry. Also, find the next relocation to examine on the | |
9062 | next iteration. */ | |
9063 | if (offset_rel) | |
e0001a05 | 9064 | { |
1d25768e | 9065 | if (offset_rel->r_offset >= offset + entry_size) |
e0001a05 | 9066 | { |
1d25768e BW |
9067 | next_rel = offset_rel; |
9068 | /* There are no relocations on the current entry, but we | |
9069 | might still be able to remove it if the size is zero. */ | |
9070 | offset_rel = NULL; | |
9071 | } | |
9072 | else if (offset_rel->r_offset > offset | |
9073 | || (extra_rel | |
9074 | && extra_rel->r_offset < offset + entry_size)) | |
9075 | { | |
9076 | /* There is a relocation on the size or flags, so we can't | |
9077 | do anything with this entry. Continue with the next. */ | |
9078 | next_rel = offset_rel; | |
9079 | continue; | |
9080 | } | |
9081 | else | |
9082 | { | |
9083 | BFD_ASSERT (offset_rel->r_offset == offset); | |
9084 | offset_rel->r_offset -= removed_bytes; | |
9085 | next_rel = offset_rel + 1; | |
e0001a05 | 9086 | } |
e0001a05 | 9087 | } |
1d25768e BW |
9088 | else |
9089 | next_rel = NULL; | |
e0001a05 | 9090 | |
1d25768e | 9091 | remove_this_rel = FALSE; |
e0001a05 NC |
9092 | bytes_to_remove = 0; |
9093 | actual_offset = offset - removed_bytes; | |
9094 | size = bfd_get_32 (abfd, &contents[actual_offset + 4]); | |
9095 | ||
43cd72b9 BW |
9096 | if (is_full_prop_section) |
9097 | flags = bfd_get_32 (abfd, &contents[actual_offset + 8]); | |
9098 | else | |
9099 | flags = predef_flags; | |
9100 | ||
1d25768e BW |
9101 | if (size == 0 |
9102 | && (flags & XTENSA_PROP_ALIGN) == 0 | |
9103 | && (flags & XTENSA_PROP_UNREACHABLE) == 0) | |
e0001a05 | 9104 | { |
43cd72b9 BW |
9105 | /* Always remove entries with zero size and no alignment. */ |
9106 | bytes_to_remove = entry_size; | |
1d25768e BW |
9107 | if (offset_rel) |
9108 | remove_this_rel = TRUE; | |
e0001a05 | 9109 | } |
1d25768e BW |
9110 | else if (offset_rel |
9111 | && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32) | |
e0001a05 | 9112 | { |
1d25768e | 9113 | if (last_irel) |
e0001a05 | 9114 | { |
1d25768e BW |
9115 | flagword old_flags; |
9116 | bfd_vma old_size = | |
9117 | bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]); | |
9118 | bfd_vma old_address = | |
9119 | (last_irel->r_addend | |
9120 | + bfd_get_32 (abfd, &contents[last_irel->r_offset])); | |
9121 | bfd_vma new_address = | |
9122 | (offset_rel->r_addend | |
9123 | + bfd_get_32 (abfd, &contents[actual_offset])); | |
9124 | if (is_full_prop_section) | |
9125 | old_flags = bfd_get_32 | |
9126 | (abfd, &contents[last_irel->r_offset + 8]); | |
9127 | else | |
9128 | old_flags = predef_flags; | |
9129 | ||
9130 | if ((ELF32_R_SYM (offset_rel->r_info) | |
9131 | == ELF32_R_SYM (last_irel->r_info)) | |
9132 | && old_address + old_size == new_address | |
9133 | && old_flags == flags | |
9134 | && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0 | |
9135 | && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0) | |
e0001a05 | 9136 | { |
1d25768e BW |
9137 | /* Fix the old size. */ |
9138 | bfd_put_32 (abfd, old_size + size, | |
9139 | &contents[last_irel->r_offset + 4]); | |
9140 | bytes_to_remove = entry_size; | |
9141 | remove_this_rel = TRUE; | |
e0001a05 NC |
9142 | } |
9143 | else | |
1d25768e | 9144 | last_irel = offset_rel; |
e0001a05 | 9145 | } |
1d25768e BW |
9146 | else |
9147 | last_irel = offset_rel; | |
e0001a05 NC |
9148 | } |
9149 | ||
1d25768e | 9150 | if (remove_this_rel) |
e0001a05 | 9151 | { |
1d25768e BW |
9152 | offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); |
9153 | /* In case this is the last entry, move the relocation offset | |
9154 | to the previous entry, if there is one. */ | |
9155 | if (offset_rel->r_offset >= bytes_to_remove) | |
9156 | offset_rel->r_offset -= bytes_to_remove; | |
9157 | else | |
9158 | offset_rel->r_offset = 0; | |
e0001a05 NC |
9159 | } |
9160 | ||
9161 | if (bytes_to_remove != 0) | |
9162 | { | |
9163 | removed_bytes += bytes_to_remove; | |
43cd72b9 | 9164 | if (offset + bytes_to_remove < section_size) |
e0001a05 | 9165 | memmove (&contents[actual_offset], |
43cd72b9 BW |
9166 | &contents[actual_offset + bytes_to_remove], |
9167 | section_size - offset - bytes_to_remove); | |
e0001a05 NC |
9168 | } |
9169 | } | |
9170 | ||
43cd72b9 | 9171 | if (removed_bytes) |
e0001a05 | 9172 | { |
1d25768e BW |
9173 | /* Fix up any extra relocations on the last entry. */ |
9174 | for (irel = next_rel; irel < rel_end; irel++) | |
9175 | irel->r_offset -= removed_bytes; | |
9176 | ||
e0001a05 NC |
9177 | /* Clear the removed bytes. */ |
9178 | memset (&contents[section_size - removed_bytes], 0, removed_bytes); | |
9179 | ||
eea6121a | 9180 | sec->size = section_size - removed_bytes; |
e901de89 BW |
9181 | |
9182 | if (xtensa_is_littable_section (sec)) | |
9183 | { | |
f0e6fdb2 BW |
9184 | asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc; |
9185 | if (sgotloc) | |
9186 | sgotloc->size -= removed_bytes; | |
e901de89 | 9187 | } |
e0001a05 NC |
9188 | } |
9189 | } | |
e901de89 | 9190 | |
e0001a05 NC |
9191 | error_return: |
9192 | release_internal_relocs (sec, internal_relocs); | |
9193 | release_contents (sec, contents); | |
9194 | return ok; | |
9195 | } | |
9196 | ||
9197 | \f | |
9198 | /* Third relaxation pass. */ | |
9199 | ||
9200 | /* Change symbol values to account for removed literals. */ | |
9201 | ||
43cd72b9 | 9202 | bfd_boolean |
7fa3d080 | 9203 | relax_section_symbols (bfd *abfd, asection *sec) |
e0001a05 NC |
9204 | { |
9205 | xtensa_relax_info *relax_info; | |
9206 | unsigned int sec_shndx; | |
9207 | Elf_Internal_Shdr *symtab_hdr; | |
9208 | Elf_Internal_Sym *isymbuf; | |
9209 | unsigned i, num_syms, num_locals; | |
9210 | ||
9211 | relax_info = get_xtensa_relax_info (sec); | |
9212 | BFD_ASSERT (relax_info); | |
9213 | ||
43cd72b9 BW |
9214 | if (!relax_info->is_relaxable_literal_section |
9215 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
9216 | return TRUE; |
9217 | ||
9218 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
9219 | ||
9220 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9221 | isymbuf = retrieve_local_syms (abfd); | |
9222 | ||
9223 | num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
9224 | num_locals = symtab_hdr->sh_info; | |
9225 | ||
9226 | /* Adjust the local symbols defined in this section. */ | |
9227 | for (i = 0; i < num_locals; i++) | |
9228 | { | |
9229 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
9230 | ||
9231 | if (isym->st_shndx == sec_shndx) | |
9232 | { | |
43cd72b9 BW |
9233 | bfd_vma new_address = offset_with_removed_text |
9234 | (&relax_info->action_list, isym->st_value); | |
9235 | bfd_vma new_size = isym->st_size; | |
9236 | ||
9237 | if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC) | |
9238 | { | |
9239 | bfd_vma new_end = offset_with_removed_text | |
9240 | (&relax_info->action_list, isym->st_value + isym->st_size); | |
9241 | new_size = new_end - new_address; | |
9242 | } | |
9243 | ||
9244 | isym->st_value = new_address; | |
9245 | isym->st_size = new_size; | |
e0001a05 NC |
9246 | } |
9247 | } | |
9248 | ||
9249 | /* Now adjust the global symbols defined in this section. */ | |
9250 | for (i = 0; i < (num_syms - num_locals); i++) | |
9251 | { | |
9252 | struct elf_link_hash_entry *sym_hash; | |
9253 | ||
9254 | sym_hash = elf_sym_hashes (abfd)[i]; | |
9255 | ||
9256 | if (sym_hash->root.type == bfd_link_hash_warning) | |
9257 | sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link; | |
9258 | ||
9259 | if ((sym_hash->root.type == bfd_link_hash_defined | |
9260 | || sym_hash->root.type == bfd_link_hash_defweak) | |
9261 | && sym_hash->root.u.def.section == sec) | |
9262 | { | |
43cd72b9 BW |
9263 | bfd_vma new_address = offset_with_removed_text |
9264 | (&relax_info->action_list, sym_hash->root.u.def.value); | |
9265 | bfd_vma new_size = sym_hash->size; | |
9266 | ||
9267 | if (sym_hash->type == STT_FUNC) | |
9268 | { | |
9269 | bfd_vma new_end = offset_with_removed_text | |
9270 | (&relax_info->action_list, | |
9271 | sym_hash->root.u.def.value + sym_hash->size); | |
9272 | new_size = new_end - new_address; | |
9273 | } | |
9274 | ||
9275 | sym_hash->root.u.def.value = new_address; | |
9276 | sym_hash->size = new_size; | |
e0001a05 NC |
9277 | } |
9278 | } | |
9279 | ||
9280 | return TRUE; | |
9281 | } | |
9282 | ||
9283 | \f | |
9284 | /* "Fix" handling functions, called while performing relocations. */ | |
9285 | ||
43cd72b9 | 9286 | static bfd_boolean |
7fa3d080 BW |
9287 | do_fix_for_relocatable_link (Elf_Internal_Rela *rel, |
9288 | bfd *input_bfd, | |
9289 | asection *input_section, | |
9290 | bfd_byte *contents) | |
e0001a05 NC |
9291 | { |
9292 | r_reloc r_rel; | |
9293 | asection *sec, *old_sec; | |
9294 | bfd_vma old_offset; | |
9295 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 NC |
9296 | reloc_bfd_fix *fix; |
9297 | ||
9298 | if (r_type == R_XTENSA_NONE) | |
43cd72b9 | 9299 | return TRUE; |
e0001a05 | 9300 | |
43cd72b9 BW |
9301 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
9302 | if (!fix) | |
9303 | return TRUE; | |
e0001a05 | 9304 | |
43cd72b9 BW |
9305 | r_reloc_init (&r_rel, input_bfd, rel, contents, |
9306 | bfd_get_section_limit (input_bfd, input_section)); | |
e0001a05 | 9307 | old_sec = r_reloc_get_section (&r_rel); |
43cd72b9 BW |
9308 | old_offset = r_rel.target_offset; |
9309 | ||
9310 | if (!old_sec || !r_reloc_is_defined (&r_rel)) | |
e0001a05 | 9311 | { |
43cd72b9 BW |
9312 | if (r_type != R_XTENSA_ASM_EXPAND) |
9313 | { | |
9314 | (*_bfd_error_handler) | |
9315 | (_("%B(%A+0x%lx): unexpected fix for %s relocation"), | |
9316 | input_bfd, input_section, rel->r_offset, | |
9317 | elf_howto_table[r_type].name); | |
9318 | return FALSE; | |
9319 | } | |
e0001a05 NC |
9320 | /* Leave it be. Resolution will happen in a later stage. */ |
9321 | } | |
9322 | else | |
9323 | { | |
9324 | sec = fix->target_sec; | |
9325 | rel->r_addend += ((sec->output_offset + fix->target_offset) | |
9326 | - (old_sec->output_offset + old_offset)); | |
9327 | } | |
43cd72b9 | 9328 | return TRUE; |
e0001a05 NC |
9329 | } |
9330 | ||
9331 | ||
9332 | static void | |
7fa3d080 BW |
9333 | do_fix_for_final_link (Elf_Internal_Rela *rel, |
9334 | bfd *input_bfd, | |
9335 | asection *input_section, | |
9336 | bfd_byte *contents, | |
9337 | bfd_vma *relocationp) | |
e0001a05 NC |
9338 | { |
9339 | asection *sec; | |
9340 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 | 9341 | reloc_bfd_fix *fix; |
43cd72b9 | 9342 | bfd_vma fixup_diff; |
e0001a05 NC |
9343 | |
9344 | if (r_type == R_XTENSA_NONE) | |
9345 | return; | |
9346 | ||
43cd72b9 BW |
9347 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
9348 | if (!fix) | |
e0001a05 NC |
9349 | return; |
9350 | ||
9351 | sec = fix->target_sec; | |
43cd72b9 BW |
9352 | |
9353 | fixup_diff = rel->r_addend; | |
9354 | if (elf_howto_table[fix->src_type].partial_inplace) | |
9355 | { | |
9356 | bfd_vma inplace_val; | |
9357 | BFD_ASSERT (fix->src_offset | |
9358 | < bfd_get_section_limit (input_bfd, input_section)); | |
9359 | inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]); | |
9360 | fixup_diff += inplace_val; | |
9361 | } | |
9362 | ||
e0001a05 NC |
9363 | *relocationp = (sec->output_section->vma |
9364 | + sec->output_offset | |
43cd72b9 | 9365 | + fix->target_offset - fixup_diff); |
e0001a05 NC |
9366 | } |
9367 | ||
9368 | \f | |
9369 | /* Miscellaneous utility functions.... */ | |
9370 | ||
9371 | static asection * | |
f0e6fdb2 | 9372 | elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 9373 | { |
f0e6fdb2 BW |
9374 | struct elf_xtensa_link_hash_table *htab; |
9375 | bfd *dynobj; | |
e0001a05 NC |
9376 | char plt_name[10]; |
9377 | ||
9378 | if (chunk == 0) | |
f0e6fdb2 BW |
9379 | { |
9380 | htab = elf_xtensa_hash_table (info); | |
9381 | return htab->splt; | |
9382 | } | |
e0001a05 | 9383 | |
f0e6fdb2 | 9384 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
9385 | sprintf (plt_name, ".plt.%u", chunk); |
9386 | return bfd_get_section_by_name (dynobj, plt_name); | |
9387 | } | |
9388 | ||
9389 | ||
9390 | static asection * | |
f0e6fdb2 | 9391 | elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 9392 | { |
f0e6fdb2 BW |
9393 | struct elf_xtensa_link_hash_table *htab; |
9394 | bfd *dynobj; | |
e0001a05 NC |
9395 | char got_name[14]; |
9396 | ||
9397 | if (chunk == 0) | |
f0e6fdb2 BW |
9398 | { |
9399 | htab = elf_xtensa_hash_table (info); | |
9400 | return htab->sgotplt; | |
9401 | } | |
e0001a05 | 9402 | |
f0e6fdb2 | 9403 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
9404 | sprintf (got_name, ".got.plt.%u", chunk); |
9405 | return bfd_get_section_by_name (dynobj, got_name); | |
9406 | } | |
9407 | ||
9408 | ||
9409 | /* Get the input section for a given symbol index. | |
9410 | If the symbol is: | |
9411 | . a section symbol, return the section; | |
9412 | . a common symbol, return the common section; | |
9413 | . an undefined symbol, return the undefined section; | |
9414 | . an indirect symbol, follow the links; | |
9415 | . an absolute value, return the absolute section. */ | |
9416 | ||
9417 | static asection * | |
7fa3d080 | 9418 | get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9419 | { |
9420 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9421 | asection *target_sec = NULL; | |
43cd72b9 | 9422 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
9423 | { |
9424 | Elf_Internal_Sym *isymbuf; | |
9425 | unsigned int section_index; | |
9426 | ||
9427 | isymbuf = retrieve_local_syms (abfd); | |
9428 | section_index = isymbuf[r_symndx].st_shndx; | |
9429 | ||
9430 | if (section_index == SHN_UNDEF) | |
9431 | target_sec = bfd_und_section_ptr; | |
9432 | else if (section_index > 0 && section_index < SHN_LORESERVE) | |
9433 | target_sec = bfd_section_from_elf_index (abfd, section_index); | |
9434 | else if (section_index == SHN_ABS) | |
9435 | target_sec = bfd_abs_section_ptr; | |
9436 | else if (section_index == SHN_COMMON) | |
9437 | target_sec = bfd_com_section_ptr; | |
43cd72b9 | 9438 | else |
e0001a05 NC |
9439 | /* Who knows? */ |
9440 | target_sec = NULL; | |
9441 | } | |
9442 | else | |
9443 | { | |
9444 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
9445 | struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx]; | |
9446 | ||
9447 | while (h->root.type == bfd_link_hash_indirect | |
9448 | || h->root.type == bfd_link_hash_warning) | |
9449 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9450 | ||
9451 | switch (h->root.type) | |
9452 | { | |
9453 | case bfd_link_hash_defined: | |
9454 | case bfd_link_hash_defweak: | |
9455 | target_sec = h->root.u.def.section; | |
9456 | break; | |
9457 | case bfd_link_hash_common: | |
9458 | target_sec = bfd_com_section_ptr; | |
9459 | break; | |
9460 | case bfd_link_hash_undefined: | |
9461 | case bfd_link_hash_undefweak: | |
9462 | target_sec = bfd_und_section_ptr; | |
9463 | break; | |
9464 | default: /* New indirect warning. */ | |
9465 | target_sec = bfd_und_section_ptr; | |
9466 | break; | |
9467 | } | |
9468 | } | |
9469 | return target_sec; | |
9470 | } | |
9471 | ||
9472 | ||
9473 | static struct elf_link_hash_entry * | |
7fa3d080 | 9474 | get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9475 | { |
9476 | unsigned long indx; | |
9477 | struct elf_link_hash_entry *h; | |
9478 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9479 | ||
9480 | if (r_symndx < symtab_hdr->sh_info) | |
9481 | return NULL; | |
43cd72b9 | 9482 | |
e0001a05 NC |
9483 | indx = r_symndx - symtab_hdr->sh_info; |
9484 | h = elf_sym_hashes (abfd)[indx]; | |
9485 | while (h->root.type == bfd_link_hash_indirect | |
9486 | || h->root.type == bfd_link_hash_warning) | |
9487 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9488 | return h; | |
9489 | } | |
9490 | ||
9491 | ||
9492 | /* Get the section-relative offset for a symbol number. */ | |
9493 | ||
9494 | static bfd_vma | |
7fa3d080 | 9495 | get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
9496 | { |
9497 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9498 | bfd_vma offset = 0; | |
9499 | ||
43cd72b9 | 9500 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
9501 | { |
9502 | Elf_Internal_Sym *isymbuf; | |
9503 | isymbuf = retrieve_local_syms (abfd); | |
9504 | offset = isymbuf[r_symndx].st_value; | |
9505 | } | |
9506 | else | |
9507 | { | |
9508 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
9509 | struct elf_link_hash_entry *h = | |
9510 | elf_sym_hashes (abfd)[indx]; | |
9511 | ||
9512 | while (h->root.type == bfd_link_hash_indirect | |
9513 | || h->root.type == bfd_link_hash_warning) | |
9514 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9515 | if (h->root.type == bfd_link_hash_defined | |
9516 | || h->root.type == bfd_link_hash_defweak) | |
9517 | offset = h->root.u.def.value; | |
9518 | } | |
9519 | return offset; | |
9520 | } | |
9521 | ||
9522 | ||
9523 | static bfd_boolean | |
7fa3d080 | 9524 | is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel) |
43cd72b9 BW |
9525 | { |
9526 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
9527 | struct elf_link_hash_entry *h; | |
9528 | ||
9529 | h = get_elf_r_symndx_hash_entry (abfd, r_symndx); | |
9530 | if (h && h->root.type == bfd_link_hash_defweak) | |
9531 | return TRUE; | |
9532 | return FALSE; | |
9533 | } | |
9534 | ||
9535 | ||
9536 | static bfd_boolean | |
7fa3d080 BW |
9537 | pcrel_reloc_fits (xtensa_opcode opc, |
9538 | int opnd, | |
9539 | bfd_vma self_address, | |
9540 | bfd_vma dest_address) | |
e0001a05 | 9541 | { |
43cd72b9 BW |
9542 | xtensa_isa isa = xtensa_default_isa; |
9543 | uint32 valp = dest_address; | |
9544 | if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address) | |
9545 | || xtensa_operand_encode (isa, opc, opnd, &valp)) | |
9546 | return FALSE; | |
9547 | return TRUE; | |
e0001a05 NC |
9548 | } |
9549 | ||
9550 | ||
9551 | static bfd_boolean | |
7fa3d080 | 9552 | xtensa_is_property_section (asection *sec) |
e0001a05 | 9553 | { |
1d25768e BW |
9554 | if (xtensa_is_insntable_section (sec) |
9555 | || xtensa_is_littable_section (sec) | |
9556 | || xtensa_is_proptable_section (sec)) | |
b614a702 | 9557 | return TRUE; |
e901de89 | 9558 | |
1d25768e BW |
9559 | return FALSE; |
9560 | } | |
9561 | ||
9562 | ||
9563 | static bfd_boolean | |
9564 | xtensa_is_insntable_section (asection *sec) | |
9565 | { | |
9566 | if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME) | |
9567 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.x.")) | |
e901de89 BW |
9568 | return TRUE; |
9569 | ||
e901de89 BW |
9570 | return FALSE; |
9571 | } | |
9572 | ||
9573 | ||
9574 | static bfd_boolean | |
7fa3d080 | 9575 | xtensa_is_littable_section (asection *sec) |
e901de89 | 9576 | { |
1d25768e BW |
9577 | if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME) |
9578 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.p.")) | |
b614a702 | 9579 | return TRUE; |
e901de89 | 9580 | |
1d25768e BW |
9581 | return FALSE; |
9582 | } | |
9583 | ||
9584 | ||
9585 | static bfd_boolean | |
9586 | xtensa_is_proptable_section (asection *sec) | |
9587 | { | |
9588 | if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME) | |
9589 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop.")) | |
e901de89 | 9590 | return TRUE; |
e0001a05 | 9591 | |
e901de89 | 9592 | return FALSE; |
e0001a05 NC |
9593 | } |
9594 | ||
9595 | ||
43cd72b9 | 9596 | static int |
7fa3d080 | 9597 | internal_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 9598 | { |
43cd72b9 BW |
9599 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; |
9600 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
9601 | ||
9602 | if (a->r_offset != b->r_offset) | |
9603 | return (a->r_offset - b->r_offset); | |
9604 | ||
9605 | /* We don't need to sort on these criteria for correctness, | |
9606 | but enforcing a more strict ordering prevents unstable qsort | |
9607 | from behaving differently with different implementations. | |
9608 | Without the code below we get correct but different results | |
9609 | on Solaris 2.7 and 2.8. We would like to always produce the | |
9610 | same results no matter the host. */ | |
9611 | ||
9612 | if (a->r_info != b->r_info) | |
9613 | return (a->r_info - b->r_info); | |
9614 | ||
9615 | return (a->r_addend - b->r_addend); | |
e0001a05 NC |
9616 | } |
9617 | ||
9618 | ||
9619 | static int | |
7fa3d080 | 9620 | internal_reloc_matches (const void *ap, const void *bp) |
e0001a05 NC |
9621 | { |
9622 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; | |
9623 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
9624 | ||
43cd72b9 BW |
9625 | /* Check if one entry overlaps with the other; this shouldn't happen |
9626 | except when searching for a match. */ | |
e0001a05 NC |
9627 | return (a->r_offset - b->r_offset); |
9628 | } | |
9629 | ||
9630 | ||
74869ac7 BW |
9631 | /* Predicate function used to look up a section in a particular group. */ |
9632 | ||
9633 | static bfd_boolean | |
9634 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
9635 | { | |
9636 | const char *gname = inf; | |
9637 | const char *group_name = elf_group_name (sec); | |
9638 | ||
9639 | return (group_name == gname | |
9640 | || (group_name != NULL | |
9641 | && gname != NULL | |
9642 | && strcmp (group_name, gname) == 0)); | |
9643 | } | |
9644 | ||
9645 | ||
1d25768e BW |
9646 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
9647 | ||
74869ac7 BW |
9648 | asection * |
9649 | xtensa_get_property_section (asection *sec, const char *base_name) | |
e0001a05 | 9650 | { |
74869ac7 BW |
9651 | const char *suffix, *group_name; |
9652 | char *prop_sec_name; | |
9653 | asection *prop_sec; | |
9654 | ||
9655 | group_name = elf_group_name (sec); | |
9656 | if (group_name) | |
9657 | { | |
9658 | suffix = strrchr (sec->name, '.'); | |
9659 | if (suffix == sec->name) | |
9660 | suffix = 0; | |
9661 | prop_sec_name = (char *) bfd_malloc (strlen (base_name) + 1 | |
9662 | + (suffix ? strlen (suffix) : 0)); | |
9663 | strcpy (prop_sec_name, base_name); | |
9664 | if (suffix) | |
9665 | strcat (prop_sec_name, suffix); | |
9666 | } | |
9667 | else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0) | |
e0001a05 | 9668 | { |
43cd72b9 | 9669 | char *linkonce_kind = 0; |
b614a702 BW |
9670 | |
9671 | if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0) | |
7db48a12 | 9672 | linkonce_kind = "x."; |
b614a702 | 9673 | else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0) |
7db48a12 | 9674 | linkonce_kind = "p."; |
43cd72b9 BW |
9675 | else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0) |
9676 | linkonce_kind = "prop."; | |
e0001a05 | 9677 | else |
b614a702 BW |
9678 | abort (); |
9679 | ||
43cd72b9 BW |
9680 | prop_sec_name = (char *) bfd_malloc (strlen (sec->name) |
9681 | + strlen (linkonce_kind) + 1); | |
b614a702 | 9682 | memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len); |
43cd72b9 | 9683 | strcpy (prop_sec_name + linkonce_len, linkonce_kind); |
b614a702 BW |
9684 | |
9685 | suffix = sec->name + linkonce_len; | |
096c35a7 | 9686 | /* For backward compatibility, replace "t." instead of inserting |
43cd72b9 | 9687 | the new linkonce_kind (but not for "prop" sections). */ |
0112cd26 | 9688 | if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.') |
43cd72b9 BW |
9689 | suffix += 2; |
9690 | strcat (prop_sec_name + linkonce_len, suffix); | |
74869ac7 BW |
9691 | } |
9692 | else | |
9693 | prop_sec_name = strdup (base_name); | |
9694 | ||
9695 | /* Check if the section already exists. */ | |
9696 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, | |
9697 | match_section_group, | |
9698 | (void *) group_name); | |
9699 | /* If not, create it. */ | |
9700 | if (! prop_sec) | |
9701 | { | |
9702 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
9703 | flags |= (bfd_get_section_flags (sec->owner, sec) | |
9704 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)); | |
9705 | ||
9706 | prop_sec = bfd_make_section_anyway_with_flags | |
9707 | (sec->owner, strdup (prop_sec_name), flags); | |
9708 | if (! prop_sec) | |
9709 | return 0; | |
b614a702 | 9710 | |
74869ac7 | 9711 | elf_group_name (prop_sec) = group_name; |
e0001a05 NC |
9712 | } |
9713 | ||
74869ac7 BW |
9714 | free (prop_sec_name); |
9715 | return prop_sec; | |
e0001a05 NC |
9716 | } |
9717 | ||
43cd72b9 BW |
9718 | |
9719 | flagword | |
7fa3d080 | 9720 | xtensa_get_property_predef_flags (asection *sec) |
43cd72b9 | 9721 | { |
1d25768e | 9722 | if (xtensa_is_insntable_section (sec)) |
43cd72b9 BW |
9723 | return (XTENSA_PROP_INSN |
9724 | | XTENSA_PROP_INSN_NO_TRANSFORM | |
9725 | | XTENSA_PROP_INSN_NO_REORDER); | |
9726 | ||
9727 | if (xtensa_is_littable_section (sec)) | |
9728 | return (XTENSA_PROP_LITERAL | |
9729 | | XTENSA_PROP_INSN_NO_TRANSFORM | |
9730 | | XTENSA_PROP_INSN_NO_REORDER); | |
9731 | ||
9732 | return 0; | |
9733 | } | |
9734 | ||
e0001a05 NC |
9735 | \f |
9736 | /* Other functions called directly by the linker. */ | |
9737 | ||
9738 | bfd_boolean | |
7fa3d080 BW |
9739 | xtensa_callback_required_dependence (bfd *abfd, |
9740 | asection *sec, | |
9741 | struct bfd_link_info *link_info, | |
9742 | deps_callback_t callback, | |
9743 | void *closure) | |
e0001a05 NC |
9744 | { |
9745 | Elf_Internal_Rela *internal_relocs; | |
9746 | bfd_byte *contents; | |
9747 | unsigned i; | |
9748 | bfd_boolean ok = TRUE; | |
43cd72b9 BW |
9749 | bfd_size_type sec_size; |
9750 | ||
9751 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 NC |
9752 | |
9753 | /* ".plt*" sections have no explicit relocations but they contain L32R | |
9754 | instructions that reference the corresponding ".got.plt*" sections. */ | |
9755 | if ((sec->flags & SEC_LINKER_CREATED) != 0 | |
0112cd26 | 9756 | && CONST_STRNEQ (sec->name, ".plt")) |
e0001a05 NC |
9757 | { |
9758 | asection *sgotplt; | |
9759 | ||
9760 | /* Find the corresponding ".got.plt*" section. */ | |
9761 | if (sec->name[4] == '\0') | |
9762 | sgotplt = bfd_get_section_by_name (sec->owner, ".got.plt"); | |
9763 | else | |
9764 | { | |
9765 | char got_name[14]; | |
9766 | int chunk = 0; | |
9767 | ||
9768 | BFD_ASSERT (sec->name[4] == '.'); | |
9769 | chunk = strtol (&sec->name[5], NULL, 10); | |
9770 | ||
9771 | sprintf (got_name, ".got.plt.%u", chunk); | |
9772 | sgotplt = bfd_get_section_by_name (sec->owner, got_name); | |
9773 | } | |
9774 | BFD_ASSERT (sgotplt); | |
9775 | ||
9776 | /* Assume worst-case offsets: L32R at the very end of the ".plt" | |
9777 | section referencing a literal at the very beginning of | |
9778 | ".got.plt". This is very close to the real dependence, anyway. */ | |
43cd72b9 | 9779 | (*callback) (sec, sec_size, sgotplt, 0, closure); |
e0001a05 NC |
9780 | } |
9781 | ||
9782 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
9783 | link_info->keep_memory); | |
9784 | if (internal_relocs == NULL | |
43cd72b9 | 9785 | || sec->reloc_count == 0) |
e0001a05 NC |
9786 | return ok; |
9787 | ||
9788 | /* Cache the contents for the duration of this scan. */ | |
9789 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 9790 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
9791 | { |
9792 | ok = FALSE; | |
9793 | goto error_return; | |
9794 | } | |
9795 | ||
43cd72b9 BW |
9796 | if (!xtensa_default_isa) |
9797 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 9798 | |
43cd72b9 | 9799 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
9800 | { |
9801 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 | 9802 | if (is_l32r_relocation (abfd, sec, contents, irel)) |
e0001a05 NC |
9803 | { |
9804 | r_reloc l32r_rel; | |
9805 | asection *target_sec; | |
9806 | bfd_vma target_offset; | |
43cd72b9 BW |
9807 | |
9808 | r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size); | |
e0001a05 NC |
9809 | target_sec = NULL; |
9810 | target_offset = 0; | |
9811 | /* L32Rs must be local to the input file. */ | |
9812 | if (r_reloc_is_defined (&l32r_rel)) | |
9813 | { | |
9814 | target_sec = r_reloc_get_section (&l32r_rel); | |
43cd72b9 | 9815 | target_offset = l32r_rel.target_offset; |
e0001a05 NC |
9816 | } |
9817 | (*callback) (sec, irel->r_offset, target_sec, target_offset, | |
9818 | closure); | |
9819 | } | |
9820 | } | |
9821 | ||
9822 | error_return: | |
9823 | release_internal_relocs (sec, internal_relocs); | |
9824 | release_contents (sec, contents); | |
9825 | return ok; | |
9826 | } | |
9827 | ||
2f89ff8d L |
9828 | /* The default literal sections should always be marked as "code" (i.e., |
9829 | SHF_EXECINSTR). This is particularly important for the Linux kernel | |
9830 | module loader so that the literals are not placed after the text. */ | |
b35d266b | 9831 | static const struct bfd_elf_special_section elf_xtensa_special_sections[] = |
2f89ff8d | 9832 | { |
0112cd26 NC |
9833 | { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
9834 | { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
9835 | { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2caa7ca0 | 9836 | { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 }, |
0112cd26 | 9837 | { NULL, 0, 0, 0, 0 } |
7f4d3958 | 9838 | }; |
e0001a05 NC |
9839 | \f |
9840 | #ifndef ELF_ARCH | |
9841 | #define TARGET_LITTLE_SYM bfd_elf32_xtensa_le_vec | |
9842 | #define TARGET_LITTLE_NAME "elf32-xtensa-le" | |
9843 | #define TARGET_BIG_SYM bfd_elf32_xtensa_be_vec | |
9844 | #define TARGET_BIG_NAME "elf32-xtensa-be" | |
9845 | #define ELF_ARCH bfd_arch_xtensa | |
9846 | ||
4af0a1d8 BW |
9847 | #define ELF_MACHINE_CODE EM_XTENSA |
9848 | #define ELF_MACHINE_ALT1 EM_XTENSA_OLD | |
e0001a05 NC |
9849 | |
9850 | #if XCHAL_HAVE_MMU | |
9851 | #define ELF_MAXPAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE) | |
9852 | #else /* !XCHAL_HAVE_MMU */ | |
9853 | #define ELF_MAXPAGESIZE 1 | |
9854 | #endif /* !XCHAL_HAVE_MMU */ | |
9855 | #endif /* ELF_ARCH */ | |
9856 | ||
9857 | #define elf_backend_can_gc_sections 1 | |
9858 | #define elf_backend_can_refcount 1 | |
9859 | #define elf_backend_plt_readonly 1 | |
9860 | #define elf_backend_got_header_size 4 | |
9861 | #define elf_backend_want_dynbss 0 | |
9862 | #define elf_backend_want_got_plt 1 | |
9863 | ||
9864 | #define elf_info_to_howto elf_xtensa_info_to_howto_rela | |
9865 | ||
e0001a05 NC |
9866 | #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data |
9867 | #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook | |
9868 | #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data | |
9869 | #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section | |
9870 | #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup | |
157090f7 AM |
9871 | #define bfd_elf32_bfd_reloc_name_lookup \ |
9872 | elf_xtensa_reloc_name_lookup | |
e0001a05 | 9873 | #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags |
f0e6fdb2 | 9874 | #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create |
e0001a05 NC |
9875 | |
9876 | #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol | |
9877 | #define elf_backend_check_relocs elf_xtensa_check_relocs | |
e0001a05 NC |
9878 | #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections |
9879 | #define elf_backend_discard_info elf_xtensa_discard_info | |
9880 | #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs | |
9881 | #define elf_backend_final_write_processing elf_xtensa_final_write_processing | |
9882 | #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections | |
9883 | #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol | |
9884 | #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook | |
9885 | #define elf_backend_gc_sweep_hook elf_xtensa_gc_sweep_hook | |
9886 | #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus | |
9887 | #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo | |
e0001a05 NC |
9888 | #define elf_backend_object_p elf_xtensa_object_p |
9889 | #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class | |
9890 | #define elf_backend_relocate_section elf_xtensa_relocate_section | |
9891 | #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections | |
74541ad4 AM |
9892 | #define elf_backend_omit_section_dynsym \ |
9893 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
29ef7005 | 9894 | #define elf_backend_special_sections elf_xtensa_special_sections |
a77dc2cc | 9895 | #define elf_backend_action_discarded elf_xtensa_action_discarded |
e0001a05 NC |
9896 | |
9897 | #include "elf32-target.h" |