| blob | dd2c55ce0b0a02784ce2ea8588ac97464953a21e |
1 /* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
4 Most of the information added by Ian Lance Taylor, Cygnus Support,
5 <ian@cygnus.com>.
6 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
7 <mark@codesourcery.com>
9 This file is part of BFD, the Binary File Descriptor library.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
26 different MIPS ELF from other targets. This matters when linking.
27 This file supports both, switching at runtime. */
37 /* Get the ECOFF swapping routines. */
43 #define ECOFF_32
46 /* This structure is used to hold .got information when linking. It
47 is stored in the tdata field of the bfd_elf_section_data structure. */
49 struct mips_got_info
50 {
51 /* The global symbol in the GOT with the lowest index in the dynamic
52 symbol table. */
54 /* The number of global .got entries. */
56 /* The number of local .got entries. */
58 /* The number of local .got entries we have used. */
60 };
62 /* The MIPS ELF linker needs additional information for each symbol in
63 the global hash table. */
65 struct mips_elf_link_hash_entry
66 {
69 /* External symbol information. */
70 EXTR esym;
72 /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against
73 this symbol. */
76 /* The index of the first dynamic relocation (in the .rel.dyn
77 section) against this symbol. */
80 /* If there is a stub that 32 bit functions should use to call this
81 16 bit function, this points to the section containing the stub. */
84 /* Whether we need the fn_stub; this is set if this symbol appears
85 in any relocs other than a 16 bit call. */
86 boolean need_fn_stub;
88 /* If there is a stub that 16 bit functions should use to call this
89 32 bit function, this points to the section containing the stub. */
92 /* This is like the call_stub field, but it is used if the function
93 being called returns a floating point value. */
95 };
97 static bfd_reloc_status_type mips32_64bit_reloc
103 static void mips_info_to_howto_rel
105 static void mips_info_to_howto_rela
107 static void bfd_mips_elf32_swap_gptab_in
109 static void bfd_mips_elf32_swap_gptab_out
111 static void bfd_mips_elf_swap_msym_in
113 static void bfd_mips_elf_swap_msym_out
116 static boolean mips_elf_create_procedure_table
122 static boolean mips_elf_is_local_label_name
127 static void mips_elf_relocate_hi16
129 bfd_vma));
130 static boolean mips_elf_relocate_got_local
133 static void mips_elf_relocate_global_got
135 static bfd_reloc_status_type mips16_jump_reloc
137 static bfd_reloc_status_type mips16_gprel_reloc
139 static boolean mips_elf_create_compact_rel_section
141 static boolean mips_elf_create_got_section
143 static bfd_reloc_status_type mips_elf_final_gp
150 static void mips_elf_irix6_finish_dynamic_symbol
157 static bfd_vma mips_elf_global_got_index
159 static bfd_vma mips_elf_local_got_index
161 static bfd_vma mips_elf_got_offset_from_index
163 static boolean mips_elf_record_global_got_symbol
166 static bfd_vma mips_elf_got_page
168 static boolean mips_elf_next_lo16_addend
170 static bfd_reloc_status_type mips_elf_calculate_relocation
174 boolean *));
175 static bfd_vma mips_elf_obtain_contents
177 static boolean mips_elf_perform_relocation
182 static boolean mips_elf_sort_hash_table_f
184 static boolean mips_elf_sort_hash_table
189 static boolean mips_elf_local_relocation_p
191 static bfd_vma mips_elf_create_local_got_entry
193 static bfd_vma mips_elf_got16_entry
195 static unsigned int mips_elf_create_dynamic_relocation
198 static void mips_elf_allocate_dynamic_relocations
200 static boolean mips_elf_stub_section_p
203 /* The level of IRIX compatibility we're striving for. */
206 ict_none,
207 ict_irix5,
208 ict_irix6
211 /* Nonzero if ABFD is using the N32 ABI. */
213 #define ABI_N32_P(abfd) \
214 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
216 /* Nonzero if ABFD is using the 64-bit ABI. FIXME: This is never
217 true, yet. */
218 #define ABI_64_P(abfd) \
219 ((elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) != 0)
221 /* What version of Irix we are trying to be compatible with. FIXME:
222 At the moment, we never generate "normal" MIPS ELF ABI executables;
223 we always use some version of Irix. */
225 #define IRIX_COMPAT(abfd) \
226 ((ABI_N32_P (abfd) || ABI_64_P (abfd)) ? ict_irix6 : ict_irix5)
228 /* Whether we are trying to be compatible with IRIX at all. */
230 #define SGI_COMPAT(abfd) \
231 (IRIX_COMPAT (abfd) != ict_none)
233 /* The name of the msym section. */
236 /* The name of the srdata section. */
239 /* The name of the options section. */
240 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
243 /* The name of the stub section. */
244 #define MIPS_ELF_STUB_SECTION_NAME(abfd) \
247 /* The name of the dynamic relocation section. */
250 /* The size of an external REL relocation. */
251 #define MIPS_ELF_REL_SIZE(abfd) \
252 (get_elf_backend_data (abfd)->s->sizeof_rel)
254 /* The size of an external dynamic table entry. */
255 #define MIPS_ELF_DYN_SIZE(abfd) \
256 (get_elf_backend_data (abfd)->s->sizeof_dyn)
258 /* The size of a GOT entry. */
259 #define MIPS_ELF_GOT_SIZE(abfd) \
260 (get_elf_backend_data (abfd)->s->arch_size / 8)
262 /* The size of a symbol-table entry. */
263 #define MIPS_ELF_SYM_SIZE(abfd) \
264 (get_elf_backend_data (abfd)->s->sizeof_sym)
266 /* The default alignment for sections, as a power of two. */
267 #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \
268 (get_elf_backend_data (abfd)->s->file_align == 8 ? 3 : 2)
270 /* Get word-sized data. */
271 #define MIPS_ELF_GET_WORD(abfd, ptr) \
272 (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr))
274 /* Put out word-sized data. */
275 #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \
276 (ABI_64_P (abfd) \
277 ? bfd_put_64 (abfd, val, ptr) \
278 : bfd_put_32 (abfd, val, ptr))
280 /* Add a dynamic symbol table-entry. */
281 #ifdef BFD64
282 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
283 (ABI_64_P (elf_hash_table (info)->dynobj) \
284 ? bfd_elf64_add_dynamic_entry (info, tag, val) \
285 : bfd_elf32_add_dynamic_entry (info, tag, val))
286 #else
287 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
288 (ABI_64_P (elf_hash_table (info)->dynobj) \
289 ? (abort (), false) \
290 : bfd_elf32_add_dynamic_entry (info, tag, val))
291 #endif
293 /* The number of local .got entries we reserve. */
294 #define MIPS_RESERVED_GOTNO (2)
296 /* Instructions which appear in a stub. For some reason the stub is
297 slightly different on an SGI system. */
298 #define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000)
299 #define STUB_LW(abfd) \
300 (SGI_COMPAT (abfd) \
301 ? (ABI_64_P (abfd) \
308 #define MIPS_FUNCTION_STUB_SIZE (16)
310 #if 0
311 /* We no longer try to identify particular sections for the .dynsym
312 section. When we do, we wind up crashing if there are other random
313 sections with relocations. */
315 /* Names of sections which appear in the .dynsym section in an Irix 5
316 executable. */
319 {
328 NULL
329 };
331 #define SIZEOF_MIPS_DYNSYM_SECNAMES \
332 (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0])
334 /* The number of entries in mips_elf_dynsym_sec_names which go in the
335 text segment. */
337 #define MIPS_TEXT_DYNSYM_SECNO (3)
341 /* The names of the runtime procedure table symbols used on Irix 5. */
344 {
348 NULL
349 };
351 /* These structures are used to generate the .compact_rel section on
352 Irix 5. */
355 {
365 {
375 {
385 {
394 {
401 {
406 /* These are the constants used to swap the bitfields in a crinfo. */
408 #define CRINFO_CTYPE (0x1)
409 #define CRINFO_CTYPE_SH (31)
410 #define CRINFO_RTYPE (0xf)
411 #define CRINFO_RTYPE_SH (27)
412 #define CRINFO_DIST2TO (0xff)
413 #define CRINFO_DIST2TO_SH (19)
414 #define CRINFO_RELVADDR (0x7ffff)
415 #define CRINFO_RELVADDR_SH (0)
417 /* A compact relocation info has long (3 words) or short (2 words)
418 formats. A short format doesn't have VADDR field and relvaddr
419 fields contains ((VADDR - vaddr of the previous entry) >> 2). */
420 #define CRF_MIPS_LONG 1
421 #define CRF_MIPS_SHORT 0
423 /* There are 4 types of compact relocation at least. The value KONST
424 has different meaning for each type:
426 (type) (konst)
427 CT_MIPS_REL32 Address in data
428 CT_MIPS_WORD Address in word (XXX)
429 CT_MIPS_GPHI_LO GP - vaddr
430 CT_MIPS_JMPAD Address to jump
431 */
433 #define CRT_MIPS_REL32 0xa
434 #define CRT_MIPS_WORD 0xb
435 #define CRT_MIPS_GPHI_LO 0xc
436 #define CRT_MIPS_JMPAD 0xd
438 #define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
439 #define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
440 #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
441 #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
443 static void bfd_elf32_swap_compact_rel_out
445 static void bfd_elf32_swap_crinfo_out
450 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
451 from smaller values. Start with zero, widen, *then* decrement. */
452 #define MINUS_ONE (((bfd_vma)0) - 1)
455 {
456 /* No relocation. */
471 /* 16 bit relocation. */
486 /* 32 bit relocation. */
501 /* 32 bit symbol relative relocation. */
516 /* 26 bit branch address. */
524 /* This needs complex overflow
525 detection, because the upper four
526 bits must match the PC. */
534 /* High 16 bits of symbol value. */
549 /* Low 16 bits of symbol value. */
564 /* GP relative reference. */
579 /* Reference to literal section. */
594 /* Reference to global offset table. */
609 /* 16 bit PC relative reference. */
624 /* 16 bit call through global offset table. */
639 /* 32 bit GP relative reference. */
654 /* The remaining relocs are defined on Irix 5, although they are
655 not defined by the ABI. */
660 /* A 5 bit shift field. */
675 /* A 6 bit shift field. */
676 /* FIXME: This is not handled correctly; a special function is
677 needed to put the most significant bit in the right place. */
692 /* A 64 bit relocation. */
707 /* Displacement in the global offset table. */
722 /* Displacement to page pointer in the global offset table. */
737 /* Offset from page pointer in the global offset table. */
752 /* High 16 bits of displacement in global offset table. */
767 /* Low 16 bits of displacement in global offset table. */
782 /* 64 bit subtraction. Used in the N32 ABI. */
797 /* Used to cause the linker to insert and delete instructions? */
802 /* Get the higher value of a 64 bit addend. */
817 /* Get the highest value of a 64 bit addend. */
832 /* High 16 bits of displacement in global offset table. */
847 /* Low 16 bits of displacement in global offset table. */
862 /* Section displacement. */
882 /* Protected jump conversion. This is an optimization hint. No
883 relocation is required for correctness. */
897 };
899 /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This
900 is a hack to make the linker think that we need 64 bit values. */
916 /* The reloc used for the mips16 jump instruction. */
925 /* This needs complex overflow
926 detection, because the upper four
927 bits must match the PC. */
935 /* The reloc used for the mips16 gprel instruction. */
952 /* GNU extension to record C++ vtable hierarchy */
968 /* GNU extension to record C++ vtable member usage */
984 /* Do a R_MIPS_HI16 relocation. This has to be done in combination
985 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
986 the HI16. Here we just save the information we need; we do the
987 actual relocation when we see the LO16. MIPS ELF requires that the
988 LO16 immediately follow the HI16. As a GNU extension, we permit an
989 arbitrary number of HI16 relocs to be associated with a single LO16
990 reloc. This extension permits gcc to output the HI and LO relocs
991 itself. */
993 struct mips_hi16
994 {
997 bfd_vma addend;
998 };
1000 /* FIXME: This should not be a static variable. */
1004 bfd_reloc_status_type
1006 reloc_entry,
1007 symbol,
1008 data,
1009 input_section,
1010 output_bfd,
1011 error_message)
1015 PTR data;
1019 {
1020 bfd_reloc_status_type ret;
1021 bfd_vma relocation;
1024 /* If we're relocating, and this an external symbol, we don't want
1025 to change anything. */
1029 {
1032 }
1037 {
1038 boolean relocateable;
1039 bfd_vma gp;
1046 else
1047 {
1050 }
1058 }
1059 else
1060 {
1067 else
1069 }
1078 /* Save the information, and let LO16 do the actual relocation. */
1091 }
1093 /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1094 inplace relocation; this function exists in order to do the
1095 R_MIPS_HI16 relocation described above. */
1097 bfd_reloc_status_type
1099 reloc_entry,
1100 symbol,
1101 data,
1102 input_section,
1103 output_bfd,
1104 error_message)
1108 PTR data;
1112 {
1113 arelent gp_disp_relent;
1116 {
1121 {
1127 /* Do the HI16 relocation. Note that we actually don't need
1128 to know anything about the LO16 itself, except where to
1129 find the low 16 bits of the addend needed by the LO16. */
1136 /* The low order 16 bits are always treated as a signed
1137 value. Therefore, a negative value in the low order bits
1138 requires an adjustment in the high order bits. We need
1139 to make this adjustment in two ways: once for the bits we
1140 took from the data, and once for the bits we are putting
1141 back in to the data. */
1151 {
1155 }
1160 }
1163 }
1165 {
1166 bfd_reloc_status_type ret;
1169 /* FIXME: Does this case ever occur? */
1186 }
1188 /* Now do the LO16 reloc in the usual way. */
1191 }
1193 /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1194 table used for PIC code. If the symbol is an external symbol, the
1195 instruction is modified to contain the offset of the appropriate
1196 entry in the global offset table. If the symbol is a section
1197 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1198 addends are combined to form the real addend against the section
1199 symbol; the GOT16 is modified to contain the offset of an entry in
1200 the global offset table, and the LO16 is modified to offset it
1201 appropriately. Thus an offset larger than 16 bits requires a
1202 modified value in the global offset table.
1204 This implementation suffices for the assembler, but the linker does
1205 not yet know how to create global offset tables. */
1207 bfd_reloc_status_type
1209 reloc_entry,
1210 symbol,
1211 data,
1212 input_section,
1213 output_bfd,
1214 error_message)
1218 PTR data;
1222 {
1223 /* If we're relocating, and this an external symbol, we don't want
1224 to change anything. */
1228 {
1231 }
1233 /* If we're relocating, and this is a local symbol, we can handle it
1234 just like HI16. */
1241 }
1243 /* Set the GP value for OUTPUT_BFD. Returns false if this is a
1244 dangerous relocation. */
1246 static boolean
1250 {
1255 /* If we've already figured out what GP will be, just return it. */
1263 /* The linker script will have created a symbol named `_gp' with the
1264 appropriate value. */
1267 else
1268 {
1270 {
1275 {
1279 }
1280 }
1281 }
1284 {
1285 /* Only get the error once. */
1289 }
1292 }
1294 /* We have to figure out the gp value, so that we can adjust the
1295 symbol value correctly. We look up the symbol _gp in the output
1296 BFD. If we can't find it, we're stuck. We cache it in the ELF
1297 target data. We don't need to adjust the symbol value for an
1298 external symbol if we are producing relocateable output. */
1300 static bfd_reloc_status_type
1304 boolean relocateable;
1307 {
1310 {
1313 }
1317 && (! relocateable
1319 {
1321 {
1322 /* Make up a value. */
1325 }
1327 {
1331 }
1332 }
1335 }
1337 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1338 become the offset from the gp register. This function also handles
1339 R_MIPS_LITERAL relocations, although those can be handled more
1340 cleverly because the entries in the .lit8 and .lit4 sections can be
1341 merged. */
1347 bfd_reloc_status_type
1353 PTR data;
1357 {
1358 boolean relocateable;
1359 bfd_reloc_status_type ret;
1360 bfd_vma gp;
1362 /* If we're relocating, and this is an external symbol with no
1363 addend, we don't want to change anything. We will only have an
1364 addend if this is a newly created reloc, not read from an ELF
1365 file. */
1369 {
1372 }
1376 else
1377 {
1380 }
1389 }
1391 static bfd_reloc_status_type
1393 gp)
1398 boolean relocateable;
1399 PTR data;
1400 bfd_vma gp;
1401 {
1402 bfd_vma relocation;
1408 else
1419 /* Set val to the offset into the section or symbol. */
1421 {
1422 /* This case occurs with the 64-bit MIPS ELF ABI. */
1424 }
1425 else
1426 {
1430 }
1432 /* Adjust val for the final section location and GP value. If we
1433 are producing relocateable output, we don't want to do this for
1434 an external symbol. */
1445 /* Make sure it fit in 16 bits. */
1450 }
1452 /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset
1453 from the gp register? XXX */
1459 bfd_reloc_status_type
1461 reloc_entry,
1462 symbol,
1463 data,
1464 input_section,
1465 output_bfd,
1466 error_message)
1470 PTR data;
1474 {
1475 boolean relocateable;
1476 bfd_reloc_status_type ret;
1477 bfd_vma gp;
1479 /* If we're relocating, and this is an external symbol with no
1480 addend, we don't want to change anything. We will only have an
1481 addend if this is a newly created reloc, not read from an ELF
1482 file. */
1486 {
1490 }
1493 {
1496 }
1497 else
1498 {
1506 }
1510 }
1512 static bfd_reloc_status_type
1514 gp)
1519 boolean relocateable;
1520 PTR data;
1521 bfd_vma gp;
1522 {
1523 bfd_vma relocation;
1528 else
1538 {
1539 /* This case arises with the 64-bit MIPS ELF ABI. */
1541 }
1542 else
1545 /* Set val to the offset into the section or symbol. */
1548 /* Adjust val for the final section location and GP value. If we
1549 are producing relocateable output, we don't want to do this for
1550 an external symbol. */
1561 }
1563 /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are
1564 generated when addreses are 64 bits. The upper 32 bits are a simle
1565 sign extension. */
1567 static bfd_reloc_status_type
1573 PTR data;
1577 {
1578 bfd_reloc_status_type r;
1579 arelent reloc32;
1581 bfd_size_type addr;
1588 /* Do a normal 32 bit relocation on the lower 32 bits. */
1596 /* Sign extend into the upper 32 bits. */
1600 else
1608 }
1610 /* Handle a mips16 jump. */
1612 static bfd_reloc_status_type
1618 PTR data ATTRIBUTE_UNUSED;
1622 {
1626 {
1629 }
1631 /* FIXME. */
1632 {
1640 }
1643 }
1645 /* Handle a mips16 GP relative reloc. */
1647 static bfd_reloc_status_type
1653 PTR data;
1657 {
1658 boolean relocateable;
1659 bfd_reloc_status_type ret;
1660 bfd_vma gp;
1664 /* If we're relocating, and this is an external symbol with no
1665 addend, we don't want to change anything. We will only have an
1666 addend if this is a newly created reloc, not read from an ELF
1667 file. */
1671 {
1674 }
1678 else
1679 {
1682 }
1692 /* Pick up the mips16 extend instruction and the real instruction. */
1696 /* Stuff the current addend back as a 32 bit value, do the usual
1697 relocation, and then clean up. */
1719 }
1721 /* Return the ISA for a MIPS e_flags value. */
1725 flagword flags;
1726 {
1728 {
1737 }
1739 }
1741 /* Return the MACH for a MIPS e_flags value. */
1745 flagword flags;
1746 {
1748 {
1766 {
1783 }
1784 }
1787 }
1789 /* Return printable name for ABI. */
1794 {
1795 flagword flags;
1804 {
1817 }
1818 }
1820 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1823 bfd_reloc_code_real_type bfd_reloc_val;
1825 };
1828 {
1850 };
1852 /* Given a BFD reloc type, return a howto structure. */
1857 bfd_reloc_code_real_type code;
1858 {
1862 {
1865 }
1868 {
1874 /* We need to handle BFD_RELOC_CTOR specially.
1875 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the
1876 size of addresses on this architecture. */
1879 else
1890 }
1891 }
1893 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
1898 {
1900 {
1918 }
1919 }
1921 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
1923 static void
1928 {
1934 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1935 value for the object file. We get the addend now, rather than
1936 when we do the relocation, because the symbol manipulations done
1937 by the linker may cause us to lose track of the input BFD. */
1942 }
1944 /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */
1946 static void
1951 {
1952 /* Since an Elf32_Internal_Rel is an initial prefix of an
1953 Elf32_Internal_Rela, we can just use mips_info_to_howto_rel
1954 above. */
1957 /* If we ever need to do any extra processing with dst->r_addend
1958 (the field omitted in an Elf32_Internal_Rel) we can do it here. */
1959 }
1960 \f
1961 /* A .reginfo section holds a single Elf32_RegInfo structure. These
1962 routines swap this structure in and out. They are used outside of
1963 BFD, so they are globally visible. */
1965 void
1970 {
1977 }
1979 void
1984 {
1997 }
1999 /* In the 64 bit ABI, the .MIPS.options section holds register
2000 information in an Elf64_Reginfo structure. These routines swap
2001 them in and out. They are globally visible because they are used
2002 outside of BFD. These routines are here so that gas can call them
2003 without worrying about whether the 64 bit ABI has been included. */
2005 void
2010 {
2018 }
2020 void
2025 {
2040 }
2042 /* Swap an entry in a .gptab section. Note that these routines rely
2043 on the equivalence of the two elements of the union. */
2045 static void
2050 {
2053 }
2055 static void
2060 {
2065 }
2067 static void
2072 {
2079 }
2081 static void
2086 {
2096 }
2098 /* Swap in an options header. */
2100 void
2105 {
2110 }
2112 /* Swap out an options header. */
2114 void
2119 {
2124 }
2126 /* Swap in an MSYM entry. */
2128 static void
2133 {
2136 }
2138 /* Swap out an MSYM entry. */
2140 static void
2145 {
2148 }
2150 \f
2151 /* Determine whether a symbol is global for the purposes of splitting
2152 the symbol table into global symbols and local symbols. At least
2153 on Irix 5, this split must be between section symbols and all other
2154 symbols. On most ELF targets the split is between static symbols
2155 and externally visible symbols. */
2157 /*ARGSUSED*/
2158 static boolean
2162 {
2164 }
2165 \f
2166 /* Set the right machine number for a MIPS ELF file. This is used for
2167 both the 32-bit and the 64-bit ABI. */
2169 boolean
2172 {
2173 /* Irix 5 and 6 is broken. Object file symbol tables are not always
2174 sorted correctly such that local symbols precede global symbols,
2175 and the sh_info field in the symbol table is not always right. */
2181 }
2183 /* The final processing done just before writing out a MIPS ELF object
2184 file. This gets the MIPS architecture right based on the machine
2185 number. This is used by both the 32-bit and the 64-bit ABI. */
2187 /*ARGSUSED*/
2188 void
2191 boolean linker ATTRIBUTE_UNUSED;
2192 {
2200 {
2238 }
2243 /* Set the sh_info field for .gptab sections and other appropriate
2244 info for each special section. */
2248 {
2250 {
2296 else
2297 {
2301 (name
2303 }
2308 }
2309 }
2310 }
2311 \f
2312 /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
2314 boolean
2317 flagword flags;
2318 {
2325 }
2327 /* Copy backend specific data from one object module to another */
2329 boolean
2333 {
2346 }
2348 /* Merge backend specific data from an object file to the output
2349 object file when linking. */
2351 boolean
2355 {
2356 flagword old_flags;
2357 flagword new_flags;
2358 boolean ok;
2360 /* Check if we have the same endianess */
2363 {
2368 else
2375 }
2386 {
2394 {
2398 }
2401 }
2403 /* Check flag compatibility. */
2414 {
2421 }
2424 {
2431 }
2433 /* Compare the ISA's. */
2436 {
2442 /* If either has no machine specified, just compare the general isa's.
2443 Some combinations of machines are ok, if the isa's match. */
2445 || ! old_mach
2447 )
2448 {
2449 /* Don't warn about mixing -mips1 and -mips2 code, or mixing -mips3
2450 and -mips4 code. They will normally use the same data sizes and
2451 calling conventions. */
2456 {
2461 }
2462 }
2464 else
2465 {
2472 }
2476 }
2478 /* Compare ABI's. The 64-bit ABI does not use EF_MIPS_ABI. But, it
2479 does set EI_CLASS differently from any 32-bit ABI. */
2483 {
2484 /* Only error if both are set (to different values). */
2488 {
2495 }
2498 }
2500 /* Warn about any other mismatches */
2502 {
2508 }
2511 {
2514 }
2517 }
2518 \f
2519 boolean
2522 PTR ptr;
2523 {
2528 /* Print normal ELF private data. */
2531 /* xgettext:c-format */
2548 else
2559 else
2564 else
2570 }
2571 \f
2572 /* Handle a MIPS specific section when reading an object file. This
2573 is called when elfcode.h finds a section with an unknown type.
2574 This routine supports both the 32-bit and 64-bit ELF ABI.
2576 FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
2577 how to. */
2579 boolean
2584 {
2587 /* There ought to be a place to keep ELF backend specific flags, but
2588 at the moment there isn't one. We just keep track of the
2589 sections by their name, instead. Fortunately, the ABI gives
2590 suggested names for all the MIPS specific sections, so we will
2591 probably get away with this. */
2593 {
2653 }
2659 {
2665 }
2667 /* FIXME: We should record sh_info for a .gptab section. */
2669 /* For a .reginfo section, set the gp value in the tdata information
2670 from the contents of this section. We need the gp value while
2671 processing relocs, so we just get it now. The .reginfo section
2672 is not used in the 64-bit MIPS ELF ABI. */
2674 {
2675 Elf32_External_RegInfo ext;
2676 Elf32_RegInfo s;
2683 }
2685 /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
2686 set the gp value based on what we find. We may see both
2687 SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
2688 they should agree. */
2690 {
2698 {
2701 }
2705 {
2706 Elf_Internal_Options intopt;
2711 {
2712 Elf64_Internal_RegInfo intreg;
2714 bfd_mips_elf64_swap_reginfo_in
2720 }
2722 {
2723 Elf32_RegInfo intreg;
2725 bfd_mips_elf32_swap_reginfo_in
2731 }
2733 }
2735 }
2738 }
2740 /* Set the correct type for a MIPS ELF section. We do this by the
2741 section name, which is a hack, but ought to work. This routine is
2742 used by both the 32-bit and the 64-bit ABI. */
2744 boolean
2749 {
2755 {
2758 /* The sh_link field is set in final_write_processing. */
2759 }
2763 {
2766 /* The sh_info field is set in final_write_processing. */
2767 }
2771 {
2773 /* In a shared object on Irix 5.3, the .mdebug section has an
2774 entsize of 0. FIXME: Does this matter? */
2777 else
2779 }
2781 {
2783 /* In a shared object on Irix 5.3, the .reginfo section has an
2784 entsize of 0x18. FIXME: Does this matter? */
2787 else
2789 }
2794 {
2796 #if 0
2797 /* This isn't how the Irix 6 linker behaves. */
2799 #endif
2800 }
2809 {
2812 }
2814 {
2817 /* The sh_info field is set in final_write_processing. */
2818 }
2820 {
2824 }
2828 {
2830 /* The sh_link and sh_info fields are set in
2831 final_write_processing. */
2832 }
2836 {
2839 /* The sh_link field is set in final_write_processing. */
2840 }
2842 {
2846 }
2848 /* The generic elf_fake_sections will set up REL_HDR using the
2849 default kind of relocations. But, we may actually need both
2850 kinds of relocations, so we set up the second header here. */
2852 {
2857 esd->rel_hdr2
2863 }
2866 }
2868 /* Given a BFD section, try to locate the corresponding ELF section
2869 index. This is used by both the 32-bit and the 64-bit ABI.
2870 Actually, it's not clear to me that the 64-bit ABI supports these,
2871 but for non-PIC objects we will certainly want support for at least
2872 the .scommon section. */
2874 boolean
2880 {
2882 {
2885 }
2887 {
2890 }
2892 }
2894 /* When are writing out the .options or .MIPS.options section,
2895 remember the bytes we are writing out, so that we can install the
2896 GP value in the section_processing routine. */
2898 boolean
2901 sec_ptr section;
2902 PTR location;
2903 file_ptr offset;
2904 bfd_size_type count;
2905 {
2907 {
2911 {
2916 }
2919 {
2920 bfd_size_type size;
2924 else
2930 }
2933 }
2936 count);
2937 }
2939 /* Work over a section just before writing it out. This routine is
2940 used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
2941 sections that need the SHF_MIPS_GPREL flag by name; there has to be
2942 a better way. */
2944 boolean
2948 {
2951 {
2964 }
2970 {
2973 /* We stored the section contents in the elf_section_data tdata
2974 field in the set_section_contents routine. We save the
2975 section contents so that we don't have to read them again.
2976 At this point we know that elf_gp is set, so we can look
2977 through the section contents to see if there is an
2978 ODK_REGINFO structure. */
2984 {
2985 Elf_Internal_Options intopt;
2990 {
3003 }
3005 {
3018 }
3020 }
3021 }
3024 {
3030 {
3033 }
3035 {
3038 }
3040 {
3043 }
3045 {
3048 }
3050 {
3052 {
3058 }
3059 }
3060 }
3063 }
3065 \f
3066 /* MIPS ELF uses two common sections. One is the usual one, and the
3067 other is for small objects. All the small objects are kept
3068 together, and then referenced via the gp pointer, which yields
3069 faster assembler code. This is what we use for the small common
3070 section. This approach is copied from ecoff.c. */
3075 /* MIPS ELF also uses an acommon section, which represents an
3076 allocated common symbol which may be overridden by a
3077 definition in a shared library. */
3082 /* The Irix 5 support uses two virtual sections, which represent
3083 text/data symbols defined in dynamic objects. */
3094 /* Handle the special MIPS section numbers that a symbol may use.
3095 This is used for both the 32-bit and the 64-bit ABI. */
3097 void
3101 {
3106 {
3108 /* This section is used in a dynamically linked executable file.
3109 It is an allocated common section. The dynamic linker can
3110 either resolve these symbols to something in a shared
3111 library, or it can just leave them here. For our purposes,
3112 we can consider these symbols to be in a new section. */
3114 {
3115 /* Initialize the acommon section. */
3125 }
3130 /* Common symbols less than the GP size are automatically
3131 treated as SHN_MIPS_SCOMMON symbols on IRIX5. */
3135 /* Fall through. */
3138 {
3139 /* Initialize the small common section. */
3149 }
3166 #endif
3167 }
3168 }
3169 \f
3170 /* When creating an Irix 5 executable, we need REGINFO and RTPROC
3171 segments. */
3173 int
3176 {
3183 /* See if we need a PT_MIPS_REGINFO segment. */
3188 /* See if we need a PT_MIPS_OPTIONS segment. */
3194 /* See if we need a PT_MIPS_RTPROC segment. */
3201 }
3203 /* Modify the segment map for an Irix 5 executable. */
3205 boolean
3208 {
3215 /* If there is a .reginfo section, we need a PT_MIPS_REGINFO
3216 segment. */
3219 {
3224 {
3233 /* We want to put it after the PHDR and INTERP segments. */
3242 }
3243 }
3245 /* For IRIX 6, we don't have .mdebug sections, nor does anything but
3246 .dynamic end up in PT_DYNAMIC. However, we do have to insert a
3247 PT_OPTIONS segement immediately following the program header
3248 table. */
3250 {
3258 {
3261 /* Usually, there's a program header table. But, sometimes
3262 there's not (like when running the `ld' testsuite). So,
3263 if there's no program header table, we just put the
3264 options segement at the end. */
3280 }
3281 }
3282 else
3283 {
3284 /* If there are .dynamic and .mdebug sections, we make a room
3285 for the RTPROC header. FIXME: Rewrite without section names. */
3289 {
3294 {
3303 {
3307 }
3308 else
3309 {
3312 }
3314 /* We want to put it after the DYNAMIC segment. */
3323 }
3324 }
3326 /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic,
3327 .dynstr, .dynsym, and .hash sections, and everything in
3328 between. */
3336 {
3346 {
3349 {
3350 bfd_size_type sz;
3359 }
3360 }
3380 {
3387 {
3390 }
3391 }
3394 }
3395 }
3398 }
3399 \f
3400 /* The structure of the runtime procedure descriptor created by the
3401 loader for use by the static exception system. */
3416 #define cbRPDR sizeof(RPDR)
3417 #define rpdNil ((pRPDR) 0)
3419 /* Swap RPDR (runtime procedure table entry) for output. */
3421 static void ecoff_swap_rpdr_out
3424 static void
3429 {
3430 /* ecoff_put_off was defined in ecoffswap.h. */
3444 #endif
3445 }
3446 \f
3447 /* Read ECOFF debugging information from a .mdebug section into a
3448 ecoff_debug_info structure. */
3450 boolean
3455 {
3475 /* The symbolic header contains absolute file offsets and sizes to
3476 read. */
3477 #define READ(ptr, offset, count, size, type) \
3478 if (symhdr->count == 0) \
3479 debug->ptr = NULL; \
3480 else \
3481 { \
3482 debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
3483 if (debug->ptr == NULL) \
3484 goto error_return; \
3485 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
3486 || (bfd_read (debug->ptr, size, symhdr->count, \
3487 abfd) != size * symhdr->count)) \
3488 goto error_return; \
3489 }
3503 #undef READ
3510 error_return:
3536 }
3537 \f
3538 /* MIPS ELF local labels start with '$', not 'L'. */
3540 /*ARGSUSED*/
3541 static boolean
3545 {
3549 /* On Irix 6, the labels go back to starting with '.', so we accept
3550 the generic ELF local label syntax as well. */
3552 }
3554 /* MIPS ELF uses a special find_nearest_line routine in order the
3555 handle the ECOFF debugging information. */
3557 struct mips_elf_find_line
3558 {
3561 };
3563 boolean
3569 bfd_vma offset;
3573 {
3578 line_ptr))
3583 line_ptr,
3589 {
3590 flagword origflags;
3595 /* If we are called during a link, mips_elf_final_link may have
3596 cleared the SEC_HAS_CONTENTS field. We force it back on here
3597 if appropriate (which it normally will be). */
3604 {
3605 bfd_size_type external_fdr_size;
3613 {
3616 }
3619 {
3622 }
3624 /* Swap in the FDR information. */
3630 {
3633 }
3637 fraw_end = (fraw_src
3644 /* Note that we don't bother to ever free this information.
3645 find_nearest_line is either called all the time, as in
3646 objdump -l, so the information should be saved, or it is
3647 rarely called, as in ld error messages, so the memory
3648 wasted is unimportant. Still, it would probably be a
3649 good idea for free_cached_info to throw it away. */
3650 }
3654 line_ptr))
3655 {
3658 }
3661 }
3663 /* Fall back on the generic ELF find_nearest_line routine. */
3667 line_ptr);
3668 }
3669 \f
3670 /* The mips16 compiler uses a couple of special sections to handle
3671 floating point arguments.
3673 Section names that look like .mips16.fn.FNNAME contain stubs that
3674 copy floating point arguments from the fp regs to the gp regs and
3675 then jump to FNNAME. If any 32 bit function calls FNNAME, the
3676 call should be redirected to the stub instead. If no 32 bit
3677 function calls FNNAME, the stub should be discarded. We need to
3678 consider any reference to the function, not just a call, because
3679 if the address of the function is taken we will need the stub,
3680 since the address might be passed to a 32 bit function.
3682 Section names that look like .mips16.call.FNNAME contain stubs
3683 that copy floating point arguments from the gp regs to the fp
3684 regs and then jump to FNNAME. If FNNAME is a 32 bit function,
3685 then any 16 bit function that calls FNNAME should be redirected
3686 to the stub instead. If FNNAME is not a 32 bit function, the
3687 stub should be discarded.
3689 .mips16.call.fp.FNNAME sections are similar, but contain stubs
3690 which call FNNAME and then copy the return value from the fp regs
3691 to the gp regs. These stubs store the return value in $18 while
3692 calling FNNAME; any function which might call one of these stubs
3693 must arrange to save $18 around the call. (This case is not
3694 needed for 32 bit functions that call 16 bit functions, because
3695 16 bit functions always return floating point values in both
3696 $f0/$f1 and $2/$3.)
3698 Note that in all cases FNNAME might be defined statically.
3699 Therefore, FNNAME is not used literally. Instead, the relocation
3700 information will indicate which symbol the section is for.
3702 We record any stubs that we find in the symbol table. */
3708 /* MIPS ELF linker hash table. */
3710 struct mips_elf_link_hash_table
3711 {
3713 #if 0
3714 /* We no longer use this. */
3715 /* String section indices for the dynamic section symbols. */
3717 #endif
3718 /* The number of .rtproc entries. */
3719 bfd_size_type procedure_count;
3720 /* The size of the .compact_rel section (if SGI_COMPAT). */
3721 bfd_size_type compact_rel_size;
3722 /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
3723 entry is set to the address of __rld_obj_head as in Irix 5. */
3724 boolean use_rld_obj_head;
3725 /* This is the value of the __rld_map or __rld_obj_head symbol. */
3726 bfd_vma rld_value;
3727 /* This is set if we see any mips16 stub sections. */
3728 boolean mips16_stubs_seen;
3729 };
3731 /* Look up an entry in a MIPS ELF linker hash table. */
3733 #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
3734 ((struct mips_elf_link_hash_entry *) \
3735 elf_link_hash_lookup (&(table)->root, (string), (create), \
3736 (copy), (follow)))
3738 /* Traverse a MIPS ELF linker hash table. */
3740 #define mips_elf_link_hash_traverse(table, func, info) \
3741 (elf_link_hash_traverse \
3742 (&(table)->root, \
3743 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
3744 (info)))
3746 /* Get the MIPS ELF linker hash table from a link_info structure. */
3748 #define mips_elf_hash_table(p) \
3749 ((struct mips_elf_link_hash_table *) ((p)->hash))
3751 static boolean mips_elf_output_extsym
3754 /* Create an entry in a MIPS ELF linker hash table. */
3761 {
3765 /* Allocate the structure if it has not already been allocated by a
3766 subclass. */
3774 /* Call the allocation method of the superclass. */
3779 {
3780 /* Set local fields. */
3782 /* We use -2 as a marker to indicate that the information has
3783 not been set. -1 means there is no associated ifd. */
3791 }
3794 }
3796 /* Create a MIPS ELF linker hash table. */
3801 {
3810 mips_elf_link_hash_newfunc))
3811 {
3814 }
3816 #if 0
3817 /* We no longer use this. */
3820 #endif
3828 }
3830 /* Hook called by the linker routine which adds symbols from an object
3831 file. We must handle the special MIPS section numbers here. */
3833 /*ARGSUSED*/
3834 boolean
3843 {
3847 {
3848 /* Skip Irix 5 rld entry name. */
3851 }
3854 {
3856 /* Common symbols less than the GP size are automatically
3857 treated as SHN_MIPS_SCOMMON symbols. */
3861 /* Fall through. */
3869 /* This section is used in a shared object. */
3871 {
3872 /* Initialize the section. */
3883 }
3884 /* This code used to do *secp = bfd_und_section_ptr if
3885 info->shared. I don't know why, and that doesn't make sense,
3886 so I took it out. */
3891 /* Fall through. XXX Can we treat this as allocated data? */
3893 /* This section is used in a shared object. */
3895 {
3896 /* Initialize the section. */
3907 }
3908 /* This code used to do *secp = bfd_und_section_ptr if
3909 info->shared. I don't know why, and that doesn't make sense,
3910 so I took it out. */
3917 }
3923 {
3926 /* Mark __rld_obj_head as dynamic. */
3942 }
3944 /* If this is a mips16 text symbol, add 1 to the value to make it
3945 odd. This will cause something like .word SYM to come up with
3946 the right value when it is loaded into the PC. */
3951 }
3953 /* Structure used to pass information to mips_elf_output_extsym. */
3955 struct extsym_info
3956 {
3961 boolean failed;
3962 };
3964 /* This routine is used to write out ECOFF debugging external symbol
3965 information. It is called via mips_elf_link_hash_traverse. The
3966 ECOFF external symbol information must match the ELF external
3967 symbol information. Unfortunately, at this point we don't know
3968 whether a symbol is required by reloc information, so the two
3969 tables may wind up being different. We must sort out the external
3970 symbol information before we can set the final size of the .mdebug
3971 section, and we must set the size of the .mdebug section before we
3972 can relocate any sections, and we can't know which symbols are
3973 required by relocation until we relocate the sections.
3974 Fortunately, it is relatively unlikely that any symbol will be
3975 stripped but required by a reloc. In particular, it can not happen
3976 when generating a final executable. */
3978 static boolean
3981 PTR data;
3982 {
3984 boolean strip;
4000 else
4007 {
4019 {
4022 /* Use undefined class. Also, set class and type for some
4023 special symbols. */
4027 {
4031 }
4033 {
4038 }
4040 {
4044 }
4045 else
4047 }
4051 else
4052 {
4058 /* When making a shared library and symbol h is the one from
4059 the another shared library, OUTPUT_SECTION may be null. */
4062 else
4063 {
4083 else
4085 }
4086 }
4090 }
4096 {
4108 else
4110 }
4112 {
4113 /* Set type and value for a symbol with a function stub. */
4118 else
4119 {
4125 else
4127 }
4130 #endif
4131 }
4136 {
4139 }
4142 }
4144 /* Create a runtime procedure table from the .mdebug section. */
4146 static boolean
4148 PTR handle;
4153 {
4158 PTR rtproc;
4166 PDR pdr;
4167 SYMR sym;
4181 {
4218 {
4232 }
4233 }
4239 {
4242 }
4248 erp++;
4253 {
4257 }
4260 /* Set the size and contents of .rtproc section. */
4264 /* Skip this section later on (I don't think this currently
4265 matters, but someday it might). */
4281 error_return:
4293 }
4295 /* A comparison routine used to sort .gptab entries. */
4297 static int
4301 {
4306 }
4308 /* We need to use a special link routine to handle the .reginfo and
4309 the .mdebug sections. We need to merge all instances of these
4310 sections together, not write them all out sequentially. */
4312 boolean
4316 {
4322 Elf32_RegInfo reginfo;
4329 /* If all the things we linked together were PIC, but we're
4330 producing an executable (rather than a shared object), then the
4331 resulting file is CPIC (i.e., it calls PIC code.) */
4335 {
4338 }
4340 /* We'd carefully arranged the dynamic symbol indices, and then the
4341 generic size_dynamic_sections renumbered them out from under us.
4342 Rather than trying somehow to prevent the renumbering, just do
4343 the sort again. */
4345 {
4350 /* When we resort, we must tell mips_elf_sort_hash_table what
4351 the lowest index it may use is. That's the number of section
4352 symbols we're going to add. The generic ELF linker only
4353 adds these symbols when building a shared object. Note that
4354 we count the sections after (possibly) removing the .options
4355 section above. */
4361 /* Make sure we didn't grow the global .got region. */
4370 }
4372 /* On IRIX5, we omit the .options section. On IRIX6, however, we
4373 include it, even though we don't process it quite right. (Some
4374 entries are supposed to be merged.) Empirically, we seem to be
4375 better off including it then not. */
4378 {
4380 {
4389 }
4390 }
4392 /* Get a value for the GP register. */
4394 {
4404 {
4405 bfd_vma lo;
4407 /* Find the GP-relative section with the lowest offset. */
4414 /* And calculate GP relative to that. */
4416 }
4417 else
4418 {
4419 /* If the relocate_section function needs to do a reloc
4420 involving the GP value, it should make a reloc_dangerous
4421 callback to warn that GP is not defined. */
4422 }
4423 }
4425 /* Go through the sections and collect the .reginfo and .mdebug
4426 information. */
4432 {
4434 {
4437 /* We have found the .reginfo section in the output file.
4438 Look through all the link_orders comprising it and merge
4439 the information together. */
4443 {
4446 Elf32_External_RegInfo ext;
4447 Elf32_RegInfo sub;
4450 {
4454 }
4459 /* The linker emulation code has probably clobbered the
4460 size to be zero bytes. */
4478 /* ri_gp_value is set by the function
4479 mips_elf32_section_processing when the section is
4480 finally written out. */
4482 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4483 elf_link_input_bfd ignores this section. */
4485 }
4487 /* Size has been set in mips_elf_always_size_sections */
4490 /* Skip this section later on (I don't think this currently
4491 matters, but someday it might). */
4495 }
4498 {
4501 /* We have found the .mdebug section in the output file.
4502 Look through all the link_orders comprising it and merge
4503 the information together. */
4505 /* FIXME: What should the version stamp be? */
4520 /* We accumulate the debugging information itself in the
4521 debug_info structure. */
4539 {
4541 EXTR esym;
4542 bfd_vma last;
4561 {
4565 {
4568 }
4569 else
4575 }
4576 }
4581 {
4590 {
4594 }
4602 {
4603 /* I don't know what a non MIPS ELF bfd would be
4604 doing with a .mdebug section, but I don't really
4605 want to deal with it. */
4607 }
4614 /* The ECOFF linking code expects that we have already
4615 read in the debugging information and set up an
4616 ecoff_debug_info structure, so we do that now. */
4626 /* Loop through the external symbols. For each one with
4627 interesting information, try to find the symbol in
4628 the linker global hash table and save the information
4629 for the output external symbols. */
4631 eraw_end = (eraw_src
4637 {
4638 EXTR ext;
4655 {
4659 }
4662 }
4664 /* Free up the information we just read. */
4677 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4678 elf_link_input_bfd ignores this section. */
4680 }
4683 {
4684 /* Create .rtproc section. */
4687 {
4696 }
4701 }
4703 /* Build the external symbol information. */
4710 mips_elf_output_extsym,
4715 /* Set the size of the .mdebug section. */
4718 /* Skip this section later on (I don't think this currently
4719 matters, but someday it might). */
4723 }
4726 {
4733 /* The .gptab.sdata and .gptab.sbss sections hold
4734 information describing how the small data area would
4735 change depending upon the -G switch. These sections
4736 not used in executables files. */
4738 {
4744 {
4748 {
4752 }
4756 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4757 elf_link_input_bfd ignores this section. */
4759 }
4761 /* Skip this section later on (I don't think this
4762 currently matters, but someday it might). */
4765 /* Really remove the section. */
4769 ;
4774 }
4776 /* There is one gptab for initialized data, and one for
4777 uninitialized data. */
4782 else
4783 {
4789 }
4791 /* The linker script always combines .gptab.data and
4792 .gptab.sdata into .gptab.sdata, and likewise for
4793 .gptab.bss and .gptab.sbss. It is possible that there is
4794 no .sdata or .sbss section in the output file, in which
4795 case we must change the name of the output section. */
4798 {
4801 else
4805 }
4807 /* Set up the first entry. */
4815 /* Combine the input sections. */
4819 {
4822 bfd_size_type size;
4824 bfd_size_type gpentry;
4827 {
4831 }
4836 /* Combine the gptab entries for this input section one
4837 by one. We know that the input gptab entries are
4838 sorted by ascending -G value. */
4844 {
4845 Elf32_External_gptab ext_gptab;
4846 Elf32_gptab int_gptab;
4849 boolean exact;
4855 {
4858 }
4867 {
4873 }
4876 {
4880 /* We need a new table entry. */
4885 {
4888 }
4893 /* Merge in the size for the next smallest -G
4894 value, since that will be implied by this new
4895 value. */
4898 {
4904 }
4910 }
4913 }
4915 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4916 elf_link_input_bfd ignores this section. */
4918 }
4920 /* The table must be sorted by -G value. */
4924 /* Swap out the table. */
4928 {
4931 }
4940 /* Skip this section later on (I don't think this currently
4941 matters, but someday it might). */
4943 }
4944 }
4946 /* Invoke the regular ELF backend linker to do all the work. */
4948 {
4949 #ifdef BFD64
4952 #else
4956 }
4960 /* Now write out the computed sections. */
4963 {
4964 Elf32_External_RegInfo ext;
4970 }
4973 {
4981 }
4984 {
4990 }
4993 {
4999 }
5002 {
5005 {
5011 }
5012 }
5015 }
5017 /* Handle a MIPS ELF HI16 reloc. */
5019 static void
5025 bfd_vma addend;
5026 {
5027 bfd_vma insn;
5028 bfd_vma addlo;
5045 }
5047 /* Handle a MIPS ELF local GOT16 reloc. */
5049 static boolean
5058 bfd_vma addend;
5059 {
5062 bfd_vma insn;
5063 bfd_vma addlo;
5064 bfd_vma address;
5065 bfd_vma hipage;
5081 /* Get a got entry representing requested hipage. */
5091 {
5095 }
5098 {
5100 {
5105 }
5109 }
5116 }
5118 /* Handle MIPS ELF CALL16 reloc and global GOT16 reloc. */
5120 static void
5125 bfd_vma offset;
5126 {
5127 bfd_vma insn;
5133 }
5135 /* Returns the GOT section for ABFD. */
5140 {
5142 }
5144 /* Returns the GOT information associated with the link indicated by
5145 INFO. If SGOTP is non-NULL, it is filled in with the GOT
5146 section. */
5152 {
5165 }
5167 /* Return whether a relocation is against a local symbol. */
5169 static boolean
5174 {
5182 else
5183 {
5184 /* The symbol table does not follow the rule that local symbols
5185 must come before globals. */
5187 }
5188 }
5190 /* Sign-extend VALUE, which has the indicated number of BITS. */
5192 static bfd_vma
5194 bfd_vma value;
5196 {
5198 /* VALUE is negative. */
5202 }
5204 /* Return non-zero if the indicated VALUE has overflowed the maximum
5205 range expressable by a signed number with the indicated number of
5206 BITS. */
5208 static boolean
5210 bfd_vma value;
5212 {
5216 /* The value is too big. */
5219 /* The value is too small. */
5222 /* All is well. */
5224 }
5226 /* Calculate the %high function. */
5228 static bfd_vma
5230 bfd_vma value;
5231 {
5233 }
5235 /* Calculate the %higher function. */
5237 static bfd_vma
5239 bfd_vma value ATTRIBUTE_UNUSED;
5240 {
5241 #ifdef BFD64
5243 #else
5246 #endif
5247 }
5249 /* Calculate the %highest function. */
5251 static bfd_vma
5253 bfd_vma value ATTRIBUTE_UNUSED;
5254 {
5255 #ifdef BFD64
5257 #else
5260 #endif
5261 }
5263 /* Returns the GOT index for the global symbol indicated by H. */
5265 static bfd_vma
5269 {
5270 bfd_vma index;
5276 /* Once we determine the global GOT entry with the lowest dynamic
5277 symbol table index, we must put all dynamic symbols with greater
5278 indices into the GOT. That makes it easy to calculate the GOT
5279 offset. */
5286 }
5288 /* Returns the offset for the entry at the INDEXth position
5289 in the GOT. */
5291 static bfd_vma
5295 bfd_vma index;
5296 {
5298 bfd_vma gp;
5303 gp);
5304 }
5306 /* If H is a symbol that needs a global GOT entry, but has a dynamic
5307 symbol table index lower than any we've seen to date, record it for
5308 posterity. */
5310 static boolean
5315 {
5316 /* A global symbol in the GOT must also be in the dynamic symbol
5317 table. */
5322 /* If we've already marked this entry as need GOT space, we don't
5323 need to do it again. */
5327 /* By setting this to a value other than -1, we are indicating that
5328 there needs to be a GOT entry for H. */
5332 }
5334 /* This structure is passed to mips_elf_sort_hash_table_f when sorting
5335 the dynamic symbols. */
5337 struct mips_elf_hash_sort_data
5338 {
5339 /* The symbol in the global GOT with the lowest dynamic symbol table
5340 index. */
5342 /* The least dynamic symbol table index corresponding to a symbol
5343 with a GOT entry. */
5345 /* The greatest dynamic symbol table index not corresponding to a
5346 symbol without a GOT entry. */
5348 };
5350 /* If H needs a GOT entry, assign it the highest available dynamic
5351 index. Otherwise, assign it the lowest available dynamic
5352 index. */
5354 static boolean
5357 PTR data;
5358 {
5362 /* Symbols without dynamic symbol table entries aren't interesting
5363 at all. */
5369 else
5370 {
5373 }
5376 }
5378 /* Sort the dynamic symbol table so that symbols that need GOT entries
5379 appear towards the end. This reduces the amount of GOT space
5380 required. MAX_LOCAL is used to set the number of local symbols
5381 known to be in the dynamic symbol table. During
5382 mips_elf_size_dynamic_sections, this value is 1. Afterward, the
5383 section symbols are added and the count is higher. */
5385 static boolean
5389 {
5401 mips_elf_sort_hash_table_f,
5404 /* There shoud have been enough room in the symbol table to
5405 accomodate both the GOT and non-GOT symbols. */
5408 /* Now we know which dynamic symbol has the lowest dynamic symbol
5409 table index in the GOT. */
5414 }
5416 /* Create a local GOT entry for VALUE. Return the index of the entry,
5417 or -1 if it could not be created. */
5419 static bfd_vma
5424 bfd_vma value;
5425 {
5427 {
5428 /* We didn't allocate enough space in the GOT. */
5433 }
5439 }
5441 /* Returns the GOT offset at which the indicated address can be found.
5442 If there is not yet a GOT entry for this value, create one. Returns
5443 -1 if no satisfactory GOT offset can be found. */
5445 static bfd_vma
5449 bfd_vma value;
5450 {
5457 /* Look to see if we already have an appropriate entry. */
5462 {
5466 }
5469 }
5471 /* Find a GOT entry that is within 32KB of the VALUE. These entries
5472 are supposed to be placed at small offsets in the GOT, i.e.,
5473 within 32KB of GP. Return the index into the GOT for this page,
5474 and store the offset from this entry to the desired address in
5475 OFFSETP, if it is non-NULL. */
5477 static bfd_vma
5481 bfd_vma value;
5483 {
5488 bfd_vma index;
5489 bfd_vma address;
5493 /* Look to see if we aleady have an appropriate entry. */
5499 {
5503 {
5504 /* This entry will serve as the page pointer. We can add a
5505 16-bit number to it to get the actual address. */
5508 }
5509 }
5511 /* If we didn't have an appropriate entry, we create one now. */
5516 {
5519 }
5522 }
5524 /* Find a GOT entry whose higher-order 16 bits are the same as those
5525 for value. Return the index into the GOT for this entry. */
5527 static bfd_vma
5531 bfd_vma value;
5532 {
5537 bfd_vma index;
5538 bfd_vma address;
5543 /* Look to see if we already have an appropriate entry. */
5549 {
5552 {
5553 /* This entry has the right high-order 16 bits. */
5556 }
5557 }
5559 /* If we didn't have an appropriate entry, we create one now. */
5564 }
5566 /* Sets *ADDENDP to the addend for the first R_MIPS_LO16 relocation
5567 found, beginning with RELOCATION. RELEND is one-past-the-end of
5568 the relocation table. */
5570 static boolean
5575 {
5576 /* According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must be
5577 immediately following. However, for the IRIX6 ABI, the next
5578 relocation may be a composed relocation consisting of several
5579 relocations for the same address. In that case, the R_MIPS_LO16
5580 relocation may occur as one of these. We permit a similar
5581 extension in general, as that is useful for GCC. */
5583 {
5585 {
5588 }
5591 }
5593 /* We didn't find it. */
5596 }
5598 /* Create a rel.dyn relocation for the dynamic linker to resolve. The
5599 relocatin is against the symbol with the dynamic symbol table index
5600 DYNINDX. REL is the original relocation, which is now being made
5601 dynamic. */
5603 static unsigned int
5610 bfd_vma addend;
5612 {
5613 Elf_Internal_Rel outrel;
5614 boolean skip;
5621 sreloc
5628 /* The symbol for the relocation is the same as it was for the
5629 original relocation. */
5632 /* The offset for the dynamic relocation is the same as for the
5633 original relocation, adjusted by the offset at which the original
5634 section is output. */
5637 else
5638 {
5639 bfd_vma off;
5641 off = (_bfd_stab_section_offset
5643 input_section,
5649 }
5653 /* If we've decided to skip this relocation, just output an emtpy
5654 record. */
5659 {
5664 }
5665 else
5672 /* Make sure the output section is writable. The dynamic linker
5673 will be writing to it. */
5677 /* On IRIX5, make an entry of compact relocation info. */
5679 {
5684 {
5685 Elf32_crinfo cptrel;
5693 else
5704 }
5705 }
5708 }
5710 /* Calculate the value produced by the RELOCATION (which comes from
5711 the INPUT_BFD). The ADDEND is the addend to use for this
5712 RELOCATION; RELOCATION->R_ADDEND is ignored.
5714 The result of the relocation calculation is stored in VALUEP.
5715 REQUIRE_JALXP indicates whether or not the opcode used with this
5716 relocation must be JALX.
5718 This function returns bfd_reloc_continue if the caller need take no
5719 further action regarding this relocation, bfd_reloc_notsupported if
5720 something goes dramatically wrong, bfd_reloc_overflow if an
5721 overflow occurs, and bfd_reloc_ok to indicate success. */
5723 static bfd_reloc_status_type
5725 input_bfd,
5726 input_section,
5727 info,
5728 relocation,
5729 addend,
5730 howto,
5731 local_syms,
5732 local_sections,
5733 valuep,
5734 namep,
5735 require_jalxp)
5741 bfd_vma addend;
5748 {
5749 /* The eventual value we will return. */
5750 bfd_vma value;
5751 /* The address of the symbol against which the relocation is
5752 occurring. */
5754 /* The final GP value to be used for the relocatable, executable, or
5755 shared object file being produced. */
5757 /* The place (section offset or address) of the storage unit being
5758 relocated. */
5759 bfd_vma p;
5760 /* The value of GP used to create the relocatable object. */
5762 /* The offset into the global offset table at which the address of
5763 the relocation entry symbol, adjusted by the addend, resides
5764 during execution. */
5766 /* The section in which the symbol referenced by the relocation is
5767 located. */
5770 /* True if the symbol referred to by this relocation is a local
5771 symbol. */
5772 boolean local_p;
5773 /* True if the symbol referred to by this relocation is "_gp_disp". */
5779 /* True if overflow occurred during the calculation of the
5780 relocation value. */
5781 boolean overflowed_p;
5782 /* True if this relocation refers to a MIPS16 function. */
5785 /* Parse the relocation. */
5792 /* Assume that there will be no overflow. */
5795 /* Figure out whether or not the symbol is local, and get the offset
5796 used in the array of hash table entries. */
5799 local_sections);
5802 else
5803 {
5804 /* The symbol table does not follow the rule that local symbols
5805 must come before globals. */
5807 }
5809 /* Figure out the value of the symbol. */
5811 {
5821 /* MIPS16 text labels should be treated as odd. */
5825 /* Record the name of this symbol, for our caller. */
5833 }
5834 else
5835 {
5836 /* For global symbols we look up the symbol in the hash-table. */
5839 /* Find the real hash-table entry for this symbol. */
5844 /* Record the name of this symbol, for our caller. */
5847 /* See if this is the special _gp_disp symbol. Note that such a
5848 symbol must always be a global symbol. */
5850 {
5851 /* Relocations against _gp_disp are permitted only with
5852 R_MIPS_HI16 and R_MIPS_LO16 relocations. */
5857 }
5858 /* If this symbol is defined, calculate its address. Note that
5859 _gp_disp is a magic symbol, always implicitly defined by the
5860 linker, so it's inappropriate to check to see whether or not
5861 its defined. */
5865 {
5871 else
5873 }
5875 /* We allow relocations against undefined weak symbols, giving
5876 it the value zero, so that you can undefined weak functions
5877 and check to see if they exist by looking at their
5878 addresses. */
5883 {
5884 /* If this is a dynamic link, we should have created a
5885 _DYNAMIC_LINK symbol in mips_elf_create_dynamic_sections.
5886 Otherwise, we should define the symbol with a value of 0.
5887 FIXME: It should probably get into the symbol table
5888 somehow as well. */
5892 }
5893 else
5894 {
5899 }
5902 }
5904 /* If this is a 32-bit call to a 16-bit function with a stub, we
5905 need to redirect the call to the stub, unless we're already *in*
5906 a stub. */
5912 {
5913 /* This is a 32-bit call to a 16-bit function. We should
5914 have already noticed that we were going to need the
5915 stub. */
5918 else
5919 {
5922 }
5925 }
5926 /* If this is a 16-bit call to a 32-bit function with a stub, we
5927 need to redirect the call to the stub. */
5932 {
5933 /* If both call_stub and call_fp_stub are defined, we can figure
5934 out which one to use by seeing which one appears in the input
5935 file. */
5937 {
5942 {
5945 {
5948 }
5949 }
5952 }
5955 else
5960 }
5962 /* Calls from 16-bit code to 32-bit code and vice versa require the
5963 special jalx instruction. */
5967 /* If we haven't already determined the GOT offset, or the GP value,
5968 and we're going to need it, get it now. */
5970 {
5978 /* Find the index into the GOT where this value is located. */
5980 {
5982 g = mips_elf_global_got_index
5985 }
5986 else
5987 {
5991 }
5993 /* Convert GOT indices to actual offsets. */
6008 }
6010 /* Figure out what kind of relocation is being performed. */
6012 {
6024 /* If we're creating a shared library, or this relocation is
6025 against a symbol in a shared library, then we can't know
6026 where the symbol will end up. So, we create a relocation
6027 record in the output, and leave the job up to the dynamic
6028 linker. */
6030 {
6034 reloc_index
6036 info,
6037 relocation,
6039 addend,
6040 input_section);
6045 }
6046 else
6047 {
6050 else
6052 }
6057 /* The calculation for R_MIPS_26 is just the same as for an
6058 R_MIPS_26. It's only the storage of the relocated field into
6059 the output file that's different. That's handled in
6060 mips_elf_perform_relocation. So, we just fall through to the
6061 R_MIPS_26 case here. */
6065 else
6072 {
6075 }
6076 else
6077 {
6080 }
6086 else
6087 {
6089 /* The MIPS ABI requires checking the R_MIPS_LO16 relocation
6090 for overflow. But, on, say, Irix 5, relocations against
6091 _gp_disp are normally generated from the .cpload
6092 pseudo-op. It generates code that normally looks like
6093 this:
6095 lui $gp,%hi(_gp_disp)
6096 addiu $gp,$gp,%lo(_gp_disp)
6097 addu $gp,$gp,$t9
6099 Here $t9 holds the address of the function being called,
6100 as required by the MIPS ELF ABI. The R_MIPS_LO16
6101 relocation can easily overflow in this situation, but the
6102 R_MIPS_HI16 relocation will handle the overflow.
6103 Therefore, we consider this a bug in the MIPS ABI, and do
6104 not check for overflow here. */
6105 }
6109 /* Because we don't merge literal sections, we can handle this
6110 just like R_MIPS_GPREL16. In the long run, we should merge
6111 shared literals, and then we will need to additional work
6112 here. */
6114 /* Fall through. */
6117 /* The R_MIPS16_GPREL performs the same calculation as
6118 R_MIPS_GPREL16, but stores the relocated bits in a different
6119 order. We don't need to do anything special here; the
6120 differences are handled in mips_elf_perform_relocation. */
6124 else
6131 {
6135 value
6137 abfd,
6138 value);
6141 }
6143 /* Fall through. */
6162 /* We're allowed to handle these two relocations identically.
6163 The dynamic linker is allowed to handle the CALL relocations
6164 differently by creating a lazy evaluation stub. */
6180 abfd,
6181 value);
6212 /* Both of these may be ignored. R_MIPS_JALR is an optimization
6213 hint; we could improve performance by honoring that hint. */
6218 /* We don't do anything with these at present. */
6222 /* An unrecognized relocation type. */
6224 }
6226 /* Store the VALUE for our caller. */
6229 }
6231 /* Obtain the field relocated by RELOCATION. */
6233 static bfd_vma
6239 {
6240 bfd_vma x;
6243 /* Obtain the bytes. */
6249 /* The two 16-bit words will be reversed on a little-endian
6250 system. See mips_elf_perform_relocation for more details. */
6254 }
6256 /* It has been determined that the result of the RELOCATION is the
6257 VALUE. Use HOWTO to place VALUE into the output file at the
6258 appropriate position. The SECTION is the section to which the
6259 relocation applies. If REQUIRE_JALX is true, then the opcode used
6260 for the relocation must be either JAL or JALX, and it is
6261 unconditionally converted to JALX.
6263 Returns false if anything goes wrong. */
6265 static boolean
6272 bfd_vma value;
6276 boolean require_jalx;
6277 {
6278 bfd_vma x;
6282 /* Figure out where the relocation is occurring. */
6285 /* Obtain the current value. */
6288 /* Clear the field we are setting. */
6291 /* If this is the R_MIPS16_26 relocation, we must store the
6292 value in a funny way. */
6294 {
6295 /* R_MIPS16_26 is used for the mips16 jal and jalx instructions.
6296 Most mips16 instructions are 16 bits, but these instructions
6297 are 32 bits.
6299 The format of these instructions is:
6301 +--------------+--------------------------------+
6302 ! JALX ! X! Imm 20:16 ! Imm 25:21 !
6303 +--------------+--------------------------------+
6304 ! Immediate 15:0 !
6305 +-----------------------------------------------+
6307 JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
6308 Note that the immediate value in the first word is swapped.
6310 When producing a relocateable object file, R_MIPS16_26 is
6311 handled mostly like R_MIPS_26. In particular, the addend is
6312 stored as a straight 26-bit value in a 32-bit instruction.
6313 (gas makes life simpler for itself by never adjusting a
6314 R_MIPS16_26 reloc to be against a section, so the addend is
6315 always zero). However, the 32 bit instruction is stored as 2
6316 16-bit values, rather than a single 32-bit value. In a
6317 big-endian file, the result is the same; in a little-endian
6318 file, the two 16-bit halves of the 32 bit value are swapped.
6319 This is so that a disassembler can recognize the jal
6320 instruction.
6322 When doing a final link, R_MIPS16_26 is treated as a 32 bit
6323 instruction stored as two 16-bit values. The addend A is the
6324 contents of the targ26 field. The calculation is the same as
6325 R_MIPS_26. When storing the calculated value, reorder the
6326 immediate value as shown above, and don't forget to store the
6327 value as two 16-bit values.
6329 To put it in MIPS ABI terms, the relocation field is T-targ26-16,
6330 defined as
6332 big-endian:
6333 +--------+----------------------+
6334 | | |
6335 | | targ26-16 |
6336 |31 26|25 0|
6337 +--------+----------------------+
6339 little-endian:
6340 +----------+------+-------------+
6341 | | | |
6342 | sub1 | | sub2 |
6343 |0 9|10 15|16 31|
6344 +----------+--------------------+
6345 where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
6346 ((sub1 << 16) | sub2)).
6348 When producing a relocateable object file, the calculation is
6349 (((A < 2) | (P & 0xf0000000) + S) >> 2)
6350 When producing a fully linked file, the calculation is
6351 let R = (((A < 2) | (P & 0xf0000000) + S) >> 2)
6352 ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) */
6355 /* Shuffle the bits according to the formula above. */
6360 }
6362 {
6363 /* R_MIPS16_GPREL is used for GP-relative addressing in mips16
6364 mode. A typical instruction will have a format like this:
6366 +--------------+--------------------------------+
6367 ! EXTEND ! Imm 10:5 ! Imm 15:11 !
6368 +--------------+--------------------------------+
6369 ! Major ! rx ! ry ! Imm 4:0 !
6370 +--------------+--------------------------------+
6372 EXTEND is the five bit value 11110. Major is the instruction
6373 opcode.
6375 This is handled exactly like R_MIPS_GPREL16, except that the
6376 addend is retrieved and stored as shown in this diagram; that
6377 is, the Imm fields above replace the V-rel16 field.
6379 All we need to do here is shuffle the bits appropriately. As
6380 above, the two 16-bit halves must be swapped on a
6381 little-endian system. */
6385 }
6387 /* Set the field. */
6390 /* If required, turn JAL into JALX. */
6392 {
6393 boolean ok;
6395 bfd_vma jalx_opcode;
6397 /* Check to see if the opcode is already JAL or JALX. */
6399 {
6402 }
6403 else
6404 {
6407 }
6409 /* If the opcode is not JAL or JALX, there's a problem. */
6411 {
6419 }
6421 /* Make this the JALX opcode. */
6423 }
6425 /* Swap the high- and low-order 16 bits on little-endian systems
6426 when doing a MIPS16 relocation. */
6431 /* Put the value into the output. */
6434 }
6436 /* Returns true if SECTION is a MIPS16 stub section. */
6438 static boolean
6442 {
6448 }
6450 /* Relocate a MIPS ELF section. */
6452 boolean
6463 {
6466 bfd_vma addend;
6467 bfd_vma last_hi16_addend;
6475 {
6477 bfd_vma value;
6479 boolean require_jalx;
6480 /* True if the relocation is a RELA relocation, rather than a
6481 REL relocation. */
6485 /* Find the relocation howto for this relocation. */
6487 /* Some 32-bit code uses R_MIPS_64. In particular, people use
6488 64-bit code, but make sure all their addresses are in the
6489 lowermost or uppermost 32-bit section of the 64-bit address
6490 space. Thus, when they use an R_MIPS_64 they mean what is
6491 usually meant by R_MIPS_32, with the exception that the
6492 stored value is sign-extended to 64 bits. */
6494 else
6498 {
6501 /* If these relocations were originally of the REL variety,
6502 we must pull the addend out of the field that will be
6503 relocated. Otherwise, we simply use the contents of the
6504 RELA relocation. To determine which flavor or relocation
6505 this is, we depend on the fact that the INPUT_SECTION's
6506 REL_HDR is read before its REL_HDR2. */
6513 {
6514 /* Note that this is a REL relocation. */
6517 /* Get the addend, which is stored in the input file. */
6519 rel,
6520 input_bfd,
6521 contents);
6524 /* For some kinds of relocations, the ADDEND is a
6525 combination of the addend stored in two different
6526 relocations. */
6530 local_sections)))
6531 {
6532 /* Scan ahead to find a matching R_MIPS_LO16
6533 relocation. */
6534 bfd_vma l;
6539 /* Save the high-order bit for later. When we
6540 encounter the R_MIPS_LO16 relocation we will need
6541 them again. */
6546 /* Compute the combined addend. */
6548 }
6550 {
6551 /* Used the saved HI16 addend. */
6553 {
6556 }
6558 }
6560 {
6561 /* The addend is scrambled in the object file. See
6562 mips_elf_perform_relocation for details on the
6563 format. */
6567 }
6570 /* The addend is stored without its two least
6571 significant bits (which are always zero.) */
6573 }
6574 else
6576 }
6579 {
6583 /* Since we're just relocating, all we need to do is copy
6584 the relocations back out to the object file, unless
6585 they're against a section symbol, in which case we need
6586 to adjust by the section offset, or unless they're GP
6587 relative in which case we need to adjust by the amount
6588 that we're adjusting GP in this relocateable object. */
6591 /* There's nothing to do for non-local relocations. */
6597 /* Adjust the addend appropriately. */
6606 /* If the relocation is for a R_MIPS_HI16 or R_MIPS_GOT16,
6607 then we only want to write out the high-order 16 bits.
6608 The subsequent R_MIPS_LO16 will handle the low-order bits. */
6611 /* If the relocation is for an R_MIPS_26 relocation, then
6612 the two low-order bits are not stored in the object file;
6613 they are implicitly zero. */
6618 /* If this is a RELA relocation, just update the addend.
6619 We have to cast away constness for REL. */
6621 else
6622 {
6623 /* Otherwise, we have to write the value back out. Note
6624 that we use the source mask, rather than the
6625 destination mask because the place to which we are
6626 writing will be source of the addend in the final
6627 link. */
6633 }
6635 /* Go on to the next relocation. */
6637 }
6639 /* In the N32 and 64-bit ABIs there may be multiple consecutive
6640 relocations for the same offset. In that case we are
6641 supposed to treat the output of each relocation as the addend
6642 for the next. */
6647 else
6650 /* Figure out what value we are supposed to relocate. */
6652 input_bfd,
6653 input_section,
6654 info,
6655 rel,
6656 addend,
6657 howto,
6658 local_syms,
6659 local_sections,
6663 {
6665 /* There's nothing to do. */
6669 /* mips_elf_calculate_relocation already called the
6670 undefined_symbol callback. There's no real point in
6671 trying to perform the relocation at this point, so we
6672 just skip ahead to the next relocation. */
6681 /* Ignore overflow until we reach the last relocation for
6682 a given location. */
6683 ;
6684 else
6685 {
6691 }
6700 }
6702 /* If we've got another relocation for the address, keep going
6703 until we reach the last one. */
6705 {
6708 }
6711 /* See the comment above about using R_MIPS_64 in the 32-bit
6712 ABI. Until now, we've been using the HOWTO for R_MIPS_32;
6713 that calculated the right value. Now, however, we
6714 sign-extend the 32-bit result to 64-bits, and store it as a
6715 64-bit value. We are especially generous here in that we
6716 go to extreme lengths to support this usage on systems with
6717 only a 32-bit VMA. */
6718 {
6719 #ifdef BFD64
6720 /* Just sign-extend the value, and then fall through to the
6721 normal case, using the R_MIPS_64 howto. That will store
6722 the 64-bit value into a 64-bit area. */
6726 /* In the 32-bit VMA case, we must handle sign-extension and
6727 endianness manually. */
6728 bfd_vma sign_bits;
6729 bfd_vma low_bits;
6730 bfd_vma high_bits;
6734 else
6737 /* If only a 32-bit VMA is available do two separate
6738 stores. */
6740 {
6741 /* Store the sign-bits (which are most significant)
6742 first. */
6745 }
6746 else
6747 {
6750 }
6757 }
6759 /* Actually perform the relocation. */
6762 require_jalx))
6764 }
6767 }
6769 /* This hook function is called before the linker writes out a global
6770 symbol. We mark symbols as small common if appropriate. This is
6771 also where we undo the increment of the value for a mips16 symbol. */
6773 /*ARGSIGNORED*/
6774 boolean
6781 {
6782 /* If we see a common symbol, which implies a relocatable link, then
6783 if a symbol was small common in an input file, mark it as small
6784 common in the output file. */
6794 }
6795 \f
6796 /* Functions for the dynamic linker. */
6798 /* The name of the dynamic interpreter. This is put in the .interp
6799 section. */
6801 #define ELF_DYNAMIC_INTERPRETER(abfd) \
6806 /* Create dynamic sections when linking against a dynamic object. */
6808 boolean
6812 {
6814 flagword flags;
6821 /* Mips ABI requests the .dynamic section to be read only. */
6824 {
6827 }
6829 /* We need to create .got section. */
6833 /* Create the .msym section on IRIX6. It is used by the dynamic
6834 linker to speed up dynamic relocations, and to avoid computing
6835 the ELF hash for symbols. */
6840 /* Create .stub section. */
6843 {
6850 }
6855 {
6862 }
6864 /* On IRIX5, we adjust add some additional symbols and change the
6865 alignments of several sections. There is no ABI documentation
6866 indicating that this is necessary on IRIX6, nor any evidence that
6867 the linker takes such action. */
6869 {
6871 {
6885 }
6887 /* We need to create a .compact_rel section. */
6891 /* Change aligments of some sections. */
6907 }
6910 {
6926 {
6927 /* __rld_map is a four byte word located in the .data section
6928 and is filled in by the rtld to contain a pointer to
6929 the _r_debug structure. Its symbol value will be set in
6930 mips_elf_finish_dynamic_symbol. */
6947 }
6948 }
6951 }
6953 /* Create the .compact_rel section. */
6955 static boolean
6959 {
6960 flagword flags;
6964 {
6976 }
6979 }
6981 /* Create the .got section to hold the global offset table. */
6983 static boolean
6987 {
6988 flagword flags;
6993 /* This function may be called more than once. */
7006 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
7007 linker script because we don't want to define the symbol if we
7008 are not creating a global offset table. */
7024 /* The first several global offset table entries are reserved. */
7035 {
7040 }
7046 }
7048 /* Returns the .msym section for ABFD, creating it if it does not
7049 already exist. Returns NULL to indicate error. */
7054 {
7059 {
7063 SEC_ALLOC
7064 | SEC_LOAD
7065 | SEC_HAS_CONTENTS
7066 | SEC_LINKER_CREATED
7071 }
7074 }
7076 /* Add room for N relocations to the .rel.dyn section in ABFD. */
7078 static void
7082 {
7089 {
7090 /* Make room for a null element. */
7093 }
7095 }
7097 /* Look through the relocs for a section during the first phase, and
7098 allocate space in the global offset table. */
7100 boolean
7106 {
7127 /* Check for the mips16 stub sections. */
7131 {
7134 /* Look at the relocation information to figure out which symbol
7135 this is for. */
7141 {
7144 /* This stub is for a local symbol. This stub will only be
7145 needed if there is some relocation in this BFD, other
7146 than a 16 bit function call, which refers to this symbol. */
7148 {
7152 /* We can ignore stub sections when looking for relocs. */
7163 sec_relocs = (_bfd_elf32_link_read_relocs
7181 }
7184 {
7185 /* There is no non-call reloc for this stub, so we do
7186 not need it. Since this function is called before
7187 the linker maps input sections to output sections, we
7188 can easily discard it by setting the SEC_EXCLUDE
7189 flag. */
7192 }
7194 /* Record this stub in an array of local symbol stubs for
7195 this BFD. */
7197 {
7203 else
7210 }
7214 /* We don't need to set mips16_stubs_seen in this case.
7215 That flag is used to see whether we need to look through
7216 the global symbol table for stubs. We don't need to set
7217 it here, because we just have a local stub. */
7218 }
7219 else
7220 {
7226 /* H is the symbol this stub is for. */
7230 }
7231 }
7234 {
7239 /* Look at the relocation information to figure out which symbol
7240 this is for. */
7246 {
7247 /* This stub was actually built for a static symbol defined
7248 in the same file. We assume that all static symbols in
7249 mips16 code are themselves mips16, so we can simply
7250 discard this stub. Since this function is called before
7251 the linker maps input sections to output sections, we can
7252 easily discard it by setting the SEC_EXCLUDE flag. */
7255 }
7260 /* H is the symbol this stub is for. */
7264 else
7267 /* If we already have an appropriate stub for this function, we
7268 don't need another one, so we can discard this one. Since
7269 this function is called before the linker maps input sections
7270 to output sections, we can easily discard it by setting the
7271 SEC_EXCLUDE flag. We can also discard this section if we
7272 happen to already know that this is a mips16 function; it is
7273 not necessary to check this here, as it is checked later, but
7274 it is slightly faster to check now. */
7276 {
7279 }
7283 }
7286 {
7289 }
7290 else
7291 {
7295 else
7296 {
7300 }
7301 }
7307 {
7317 else
7318 {
7321 /* This may be an indirect symbol created because of a version. */
7323 {
7326 }
7327 }
7329 /* Some relocs require a global offset table. */
7331 {
7333 {
7361 }
7362 }
7368 {
7369 /* We may need a local GOT entry for this relocation. We
7370 don't count R_MIPS_GOT_PAGE because we can estimate the
7371 maximum number of pages needed by looking at the size of
7372 the segment. We don't count R_MIPS_GOT_HI16, or
7373 R_MIPS_CALL_HI16 because these are always followed by an
7374 R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
7376 This estimation is very conservative since we can merge
7377 duplicate entries in the GOT. In order to be less
7378 conservative, we could actually build the GOT here,
7379 rather than in relocate_section. */
7382 }
7385 {
7388 {
7394 }
7395 /* Fall through. */
7400 {
7401 /* This symbol requires a global offset table entry. */
7405 /* We need a stub, not a plt entry for the undefined
7406 function. But we record it as if it needs plt. See
7407 elf_adjust_dynamic_symbol in elflink.h. */
7410 }
7417 /* This symbol requires a global offset table entry. */
7427 {
7429 {
7434 {
7438 (SEC_ALLOC
7439 | SEC_LOAD
7440 | SEC_HAS_CONTENTS
7441 | SEC_IN_MEMORY
7442 | SEC_LINKER_CREATED
7447 }
7448 }
7450 /* When creating a shared object, we must copy these
7451 reloc types into the output file as R_MIPS_REL32
7452 relocs. We make room for this reloc in the
7453 .rel.dyn reloc section. */
7455 else
7456 {
7459 /* We only need to copy this reloc if the symbol is
7460 defined in a dynamic object. */
7463 }
7465 /* Even though we don't directly need a GOT entry for
7466 this symbol, a symbol must have a dynamic symbol
7467 table index greater that DT_GOTSYM if there are
7468 dynamic relocations against it. */
7471 }
7487 /* This relocation describes the C++ object vtable hierarchy.
7488 Reconstruct it for later use during GC. */
7494 /* This relocation describes which C++ vtable entries are actually
7495 used. Record for later use during GC. */
7503 }
7505 /* If this reloc is not a 16 bit call, and it has a global
7506 symbol, then we will need the fn_stub if there is one.
7507 References from a stub section do not count. */
7516 {
7521 }
7522 }
7525 }
7527 /* Return the section that should be marked against GC for a given
7528 relocation. */
7530 asection *
7537 {
7538 /* ??? Do mips16 stub sections need to be handled special? */
7541 {
7543 {
7550 {
7560 }
7561 }
7562 }
7563 else
7564 {
7569 {
7571 }
7572 }
7575 }
7577 /* Update the got entry reference counts for the section being removed. */
7579 boolean
7585 {
7586 #if 0
7601 {
7608 /* ??? It would seem that the existing MIPS code does no sort
7609 of reference counting or whatnot on its GOT and PLT entries,
7610 so it is not possible to garbage collect them at this time. */
7615 }
7616 #endif
7619 }
7622 /* Adjust a symbol defined by a dynamic object and referenced by a
7623 regular object. The current definition is in some section of the
7624 dynamic object, but we're not including those sections. We have to
7625 change the definition to something the rest of the link can
7626 understand. */
7628 boolean
7632 {
7639 /* Make sure we know what is going on here. */
7650 /* If this symbol is defined in a dynamic object, we need to copy
7651 any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output
7652 file. */
7660 /* For a function, create a stub, if needed. */
7663 {
7667 /* If this symbol is not defined in a regular file, then set
7668 the symbol to the stub location. This is required to make
7669 function pointers compare as equal between the normal
7670 executable and the shared library. */
7672 {
7673 /* We need .stub section. */
7681 /* XXX Write this stub address somewhere. */
7684 /* Make room for this stub code. */
7687 /* The last half word of the stub will be filled with the index
7688 of this symbol in .dynsym section. */
7690 }
7691 }
7693 /* If this is a weak symbol, and there is a real definition, the
7694 processor independent code will have arranged for us to see the
7695 real definition first, and we can just use the same value. */
7697 {
7703 }
7705 /* This is a reference to a symbol defined by a dynamic object which
7706 is not a function. */
7709 }
7711 /* This function is called after all the input files have been read,
7712 and the input sections have been assigned to output sections. We
7713 check for any mips16 stub sections that we can discard. */
7715 static boolean mips_elf_check_mips16_stubs
7718 boolean
7722 {
7725 /* The .reginfo section has a fixed size. */
7735 mips_elf_check_mips16_stubs,
7739 }
7741 /* Check the mips16 stubs for a particular symbol, and see if we can
7742 discard them. */
7744 /*ARGSUSED*/
7745 static boolean
7748 PTR data ATTRIBUTE_UNUSED;
7749 {
7752 {
7753 /* We don't need the fn_stub; the only references to this symbol
7754 are 16 bit calls. Clobber the size to 0 to prevent it from
7755 being included in the link. */
7761 }
7765 {
7766 /* We don't need the call_stub; this is a 16 bit function, so
7767 calls from other 16 bit functions are OK. Clobber the size
7768 to 0 to prevent it from being included in the link. */
7774 }
7778 {
7779 /* We don't need the call_stub; this is a 16 bit function, so
7780 calls from other 16 bit functions are OK. Clobber the size
7781 to 0 to prevent it from being included in the link. */
7787 }
7790 }
7792 /* Set the sizes of the dynamic sections. */
7794 boolean
7798 {
7801 boolean reltext;
7808 {
7809 /* Set the contents of the .interp section to the interpreter. */
7811 {
7814 s->_raw_size
7816 s->contents
7818 }
7819 }
7821 /* The check_relocs and adjust_dynamic_symbol entry points have
7822 determined the sizes of the various dynamic sections. Allocate
7823 memory for them. */
7826 {
7828 boolean strip;
7830 /* It's OK to base decisions on the section name, because none
7831 of the dynobj section names depend upon the input files. */
7840 {
7842 {
7843 /* We only strip the section if the output section name
7844 has the same name. Otherwise, there might be several
7845 input sections for this output section. FIXME: This
7846 code is probably not needed these days anyhow, since
7847 the linker now does not create empty output sections. */
7853 }
7854 else
7855 {
7859 /* If this relocation section applies to a read only
7860 section, then we probably need a DT_TEXTREL entry.
7861 If the relocation section is .rel.dyn, we always
7862 assert a DT_TEXTREL entry rather than testing whether
7863 there exists a relocation to a read only section or
7864 not. */
7875 /* We use the reloc_count field as a counter if we need
7876 to copy relocs into the output file. */
7880 }
7881 }
7883 {
7886 bfd_size_type local_gotno;
7893 /* Calculate the total loadable size of the output. That
7894 will give us the maximum number of GOT_PAGE entries
7895 required. */
7897 {
7901 subsection;
7903 {
7907 }
7908 }
7911 /* Assume there are two loadable segments consisting of
7912 contiguous sections. Is 5 enough? */
7917 /* There has to be a global GOT entry for every symbol with
7918 a dynamic symbol table index of DT_MIPS_GOTSYM or
7919 higher. Therefore, it make sense to put those symbols
7920 that need GOT entries at the end of the symbol table. We
7921 do that here. */
7927 else
7928 /* If there are no global symbols, or none requiring
7929 relocations, then GLOBAL_GOTSYM will be NULL. */
7933 }
7935 {
7936 /* Irix rld assumes that the function stub isn't at the end
7937 of .text section. So put a dummy. XXX */
7939 }
7943 {
7944 /* We add a room for __rld_map. It will be filled in by the
7945 rtld to contain a pointer to the _r_debug structure. */
7947 }
7957 {
7958 /* It's not one of our sections, so don't allocate space. */
7960 }
7963 {
7966 }
7968 /* Allocate memory for the section contents. */
7971 {
7974 }
7975 }
7978 {
7979 /* Add some entries to the .dynamic section. We fill in the
7980 values later, in elf_mips_finish_dynamic_sections, but we
7981 must add the entries now so that we get the correct size for
7982 the .dynamic section. The DT_DEBUG entry is filled in by the
7983 dynamic linker and used by the debugger. */
7985 {
7987 {
7988 /* SGI object has the equivalence of DT_DEBUG in the
7989 DT_MIPS_RLD_MAP entry. */
7992 }
7993 else
7996 }
7999 {
8002 }
8009 {
8018 }
8027 {
8036 }
8044 #if 0
8045 /* Time stamps in executable files are a bad idea. */
8048 #endif
8053 #endif
8058 #endif
8081 && (bfd_get_section_by_name
8090 }
8093 }
8095 /* If NAME is one of the special IRIX6 symbols defined by the linker,
8096 adjust it appropriately now. */
8098 static void
8103 {
8104 /* The linker script takes care of providing names and values for
8105 these, but we must place them into the right sections. */
8112 NULL
8113 };
8120 NULL
8121 };
8131 {
8132 /* All of these symbols are given type STT_SECTION by the
8133 IRIX6 linker. */
8136 /* The IRIX linker puts these symbols in special sections. */
8139 else
8143 }
8144 }
8146 /* Finish up dynamic symbol handling. We set the contents of various
8147 dynamic sections here. */
8149 boolean
8155 {
8157 bfd_vma gval;
8169 {
8174 /* This symbol has a stub. Set it up. */
8182 /* Fill the stub. */
8189 /* FIXME: Can h->dynindex be more than 64K? */
8200 /* Mark the symbol as undefined. plt.offset != -1 occurs
8201 only for the referenced symbol. */
8204 /* The run-time linker uses the st_value field of the symbol
8205 to reset the global offset table entry for this external
8206 to its stub address when unlinking a shared object. */
8209 }
8219 /* Run through the global symbol table, creating GOT entries for all
8220 the symbols that need them. */
8223 {
8224 bfd_vma offset;
8225 bfd_vma value;
8229 else
8230 /* For an entity defined in a shared object, this will be
8231 NULL. (For functions in shared objects for
8232 which we have created stubs, ST_VALUE will be non-NULL.
8233 That's because such the functions are now no longer defined
8234 in a shared object.) */
8239 }
8241 /* Create a .msym entry, if appropriate. */
8245 {
8246 Elf32_Internal_Msym msym;
8249 /* It is undocumented what the `1' indicates, but IRIX6 uses
8250 this value. */
8252 bfd_mips_elf_swap_msym_out
8255 }
8257 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
8263 {
8267 }
8269 {
8271 {
8275 }
8278 {
8283 }
8285 {
8290 }
8292 {
8297 }
8298 }
8300 /* Handle the IRIX6-specific symbols. */
8306 {
8309 {
8316 }
8319 {
8320 /* IRIX6 does not use a .rld_map section. */
8325 }
8326 }
8328 /* If this is a mips16 symbol, force the value to be even. */
8334 }
8336 /* Finish up the dynamic sections. */
8338 boolean
8342 {
8355 else
8356 {
8360 }
8363 {
8372 {
8373 Elf_Internal_Dyn dyn;
8377 boolean swap_out_p;
8379 /* Read in the current dynamic entry. */
8382 /* Assume that we're going to modify it and write it out. */
8386 {
8388 s = (bfd_get_section_by_name
8396 /* Rewrite DT_STRSZ. */
8409 get_vma:
8431 set_elemno:
8434 {
8437 else
8439 }
8440 else
8449 /* XXX FIXME: */
8454 /* XXX FIXME: */
8476 else
8481 /* The index into the dynamic symbol table which is the
8482 entry of the first external symbol that is not
8483 referenced within the same object. */
8500 s = (bfd_get_section_by_name
8506 s = (bfd_get_section_by_name
8514 }
8519 }
8520 }
8522 /* The first entry of the global offset table will be filled at
8523 runtime. The second entry will be used by some runtime loaders.
8524 This isn't the case of Irix rld. */
8526 {
8530 }
8536 {
8539 Elf32_compact_rel cpt;
8541 /* ??? The section symbols for the output sections were set up in
8542 _bfd_elf_final_link. SGI sets the STT_NOTYPE attribute for these
8543 symbols. Should we do so? */
8548 {
8549 Elf32_Internal_Msym msym;
8555 {
8558 bfd_mips_elf_swap_msym_out
8562 }
8563 }
8566 {
8567 /* Write .compact_rel section out. */
8570 {
8582 /* Clean up a dummy stub function entry in .text. */
8586 {
8587 file_ptr dummy_offset;
8592 MIPS_FUNCTION_STUB_SIZE);
8593 }
8594 }
8595 }
8597 /* Clean up a first relocation in .rel.dyn. */
8602 }
8605 }
8606 \f
8607 /* This is almost identical to bfd_generic_get_... except that some
8608 MIPS relocations need to be handled specially. Sigh. */
8617 boolean relocateable;
8619 {
8620 /* Get enough memory to hold the stuff */
8635 /* read in the section */
8637 input_section,
8643 /* We're not relaxing the section, so just copy the size info */
8648 input_section,
8649 reloc_vector,
8650 symbols);
8655 {
8657 /* for mips */
8661 {
8664 /* Skip all this stuff if we aren't mixing formats. */
8668 else
8669 {
8672 }
8673 lookup:
8675 {
8677 {
8691 /* @@FIXME ignoring warning for now */
8696 }
8697 }
8698 else
8700 }
8701 /* end mips */
8703 parent++)
8704 {
8706 bfd_reloc_status_type r;
8708 /* Specific to MIPS: Deal with relocation types that require
8709 knowing the gp of the output bfd. */
8712 {
8713 /* The special_function wouldn't get called anyways. */
8714 }
8716 {
8717 /* The gp isn't there; let the special function code
8718 fall over on its own. */
8719 }
8722 {
8723 /* bypass special_function call */
8727 }
8728 /* end mips specific stuff */
8733 input_section,
8736 skip_bfd_perform_relocation:
8739 {
8742 /* A partial link, so keep the relocs */
8745 }
8748 {
8750 {
8775 }
8777 }
8778 }
8779 }
8784 error_return:
8788 }
8789 #define bfd_elf32_bfd_get_relocated_section_contents \
8790 elf32_mips_get_relocated_section_contents
8791 \f
8792 /* ECOFF swapping routines. These are used when dealing with the
8793 .mdebug section, which is in the ECOFF debugging format. */
8795 {
8796 /* Symbol table magic number. */
8797 magicSym,
8798 /* Alignment of debugging information. E.g., 4. */
8800 /* Sizes of external symbolic information. */
8809 /* Functions to swap in external symbolic data. */
8810 ecoff_swap_hdr_in,
8811 ecoff_swap_dnr_in,
8812 ecoff_swap_pdr_in,
8813 ecoff_swap_sym_in,
8814 ecoff_swap_opt_in,
8815 ecoff_swap_fdr_in,
8816 ecoff_swap_rfd_in,
8817 ecoff_swap_ext_in,
8818 _bfd_ecoff_swap_tir_in,
8819 _bfd_ecoff_swap_rndx_in,
8820 /* Functions to swap out external symbolic data. */
8821 ecoff_swap_hdr_out,
8822 ecoff_swap_dnr_out,
8823 ecoff_swap_pdr_out,
8824 ecoff_swap_sym_out,
8825 ecoff_swap_opt_out,
8826 ecoff_swap_fdr_out,
8827 ecoff_swap_rfd_out,
8828 ecoff_swap_ext_out,
8829 _bfd_ecoff_swap_tir_out,
8830 _bfd_ecoff_swap_rndx_out,
8831 /* Function to read in symbolic data. */
8832 _bfd_mips_elf_read_ecoff_info
8833 };
8834 \f
8835 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
8837 #define TARGET_BIG_SYM bfd_elf32_bigmips_vec
8839 #define ELF_ARCH bfd_arch_mips
8840 #define ELF_MACHINE_CODE EM_MIPS
8842 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
8843 a value of 0x1000, and we are compatible. */
8844 #define ELF_MAXPAGESIZE 0x1000
8846 #define elf_backend_collect true
8847 #define elf_backend_type_change_ok true
8848 #define elf_backend_can_gc_sections true
8849 #define elf_info_to_howto mips_info_to_howto_rela
8850 #define elf_info_to_howto_rel mips_info_to_howto_rel
8851 #define elf_backend_sym_is_global mips_elf_sym_is_global
8852 #define elf_backend_object_p _bfd_mips_elf_object_p
8853 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
8854 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
8855 #define elf_backend_section_from_bfd_section \
8856 _bfd_mips_elf_section_from_bfd_section
8857 #define elf_backend_section_processing _bfd_mips_elf_section_processing
8858 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
8859 #define elf_backend_additional_program_headers \
8860 _bfd_mips_elf_additional_program_headers
8861 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
8862 #define elf_backend_final_write_processing \
8863 _bfd_mips_elf_final_write_processing
8864 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
8865 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
8866 #define elf_backend_create_dynamic_sections \
8867 _bfd_mips_elf_create_dynamic_sections
8868 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
8869 #define elf_backend_adjust_dynamic_symbol \
8870 _bfd_mips_elf_adjust_dynamic_symbol
8871 #define elf_backend_always_size_sections \
8872 _bfd_mips_elf_always_size_sections
8873 #define elf_backend_size_dynamic_sections \
8874 _bfd_mips_elf_size_dynamic_sections
8875 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
8876 #define elf_backend_link_output_symbol_hook \
8877 _bfd_mips_elf_link_output_symbol_hook
8878 #define elf_backend_finish_dynamic_symbol \
8879 _bfd_mips_elf_finish_dynamic_symbol
8880 #define elf_backend_finish_dynamic_sections \
8881 _bfd_mips_elf_finish_dynamic_sections
8882 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
8883 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
8885 #define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO)
8886 #define elf_backend_plt_header_size 0
8888 #define bfd_elf32_bfd_is_local_label_name \
8889 mips_elf_is_local_label_name
8890 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
8891 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
8892 #define bfd_elf32_bfd_link_hash_table_create \
8893 _bfd_mips_elf_link_hash_table_create
8894 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
8895 #define bfd_elf32_bfd_copy_private_bfd_data \
8896 _bfd_mips_elf_copy_private_bfd_data
8897 #define bfd_elf32_bfd_merge_private_bfd_data \
8898 _bfd_mips_elf_merge_private_bfd_data
8899 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
8900 #define bfd_elf32_bfd_print_private_bfd_data \
8901 _bfd_mips_elf_print_private_bfd_data