| blob | 29e260e21302078534f082d42e001d9e26c525a1 |
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 #if 0
112 static void bfd_mips_elf_swap_msym_in
114 #endif
115 static void bfd_mips_elf_swap_msym_out
118 static boolean mips_elf_create_procedure_table
124 static boolean mips_elf_is_local_label_name
129 static bfd_reloc_status_type mips16_jump_reloc
131 static bfd_reloc_status_type mips16_gprel_reloc
133 static boolean mips_elf_create_compact_rel_section
135 static boolean mips_elf_create_got_section
137 static bfd_reloc_status_type mips_elf_final_gp
144 static void mips_elf_irix6_finish_dynamic_symbol
151 static bfd_vma mips_elf_global_got_index
153 static bfd_vma mips_elf_local_got_index
155 static bfd_vma mips_elf_got_offset_from_index
157 static boolean mips_elf_record_global_got_symbol
160 static bfd_vma mips_elf_got_page
165 static bfd_reloc_status_type mips_elf_calculate_relocation
169 boolean *));
170 static bfd_vma mips_elf_obtain_contents
172 static boolean mips_elf_perform_relocation
177 static boolean mips_elf_sort_hash_table_f
179 static boolean mips_elf_sort_hash_table
184 static boolean mips_elf_local_relocation_p
186 static bfd_vma mips_elf_create_local_got_entry
188 static bfd_vma mips_elf_got16_entry
190 static boolean mips_elf_create_dynamic_relocation
194 static void mips_elf_allocate_dynamic_relocations
196 static boolean mips_elf_stub_section_p
199 /* The level of IRIX compatibility we're striving for. */
202 ict_none,
203 ict_irix5,
204 ict_irix6
207 /* Nonzero if ABFD is using the N32 ABI. */
209 #define ABI_N32_P(abfd) \
210 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
212 /* Nonzero if ABFD is using the 64-bit ABI. FIXME: This is never
213 true, yet. */
214 #define ABI_64_P(abfd) \
215 ((elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) != 0)
217 /* What version of Irix we are trying to be compatible with. FIXME:
218 At the moment, we never generate "normal" MIPS ELF ABI executables;
219 we always use some version of Irix. */
221 #define IRIX_COMPAT(abfd) \
222 ((ABI_N32_P (abfd) || ABI_64_P (abfd)) ? ict_irix6 : ict_irix5)
224 /* Whether we are trying to be compatible with IRIX at all. */
226 #define SGI_COMPAT(abfd) \
227 (IRIX_COMPAT (abfd) != ict_none)
229 /* The name of the msym section. */
232 /* The name of the srdata section. */
235 /* The name of the options section. */
236 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
239 /* The name of the stub section. */
240 #define MIPS_ELF_STUB_SECTION_NAME(abfd) \
243 /* The name of the dynamic relocation section. */
246 /* The size of an external REL relocation. */
247 #define MIPS_ELF_REL_SIZE(abfd) \
248 (get_elf_backend_data (abfd)->s->sizeof_rel)
250 /* The size of an external dynamic table entry. */
251 #define MIPS_ELF_DYN_SIZE(abfd) \
252 (get_elf_backend_data (abfd)->s->sizeof_dyn)
254 /* The size of a GOT entry. */
255 #define MIPS_ELF_GOT_SIZE(abfd) \
256 (get_elf_backend_data (abfd)->s->arch_size / 8)
258 /* The size of a symbol-table entry. */
259 #define MIPS_ELF_SYM_SIZE(abfd) \
260 (get_elf_backend_data (abfd)->s->sizeof_sym)
262 /* The default alignment for sections, as a power of two. */
263 #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \
264 (get_elf_backend_data (abfd)->s->file_align == 8 ? 3 : 2)
266 /* Get word-sized data. */
267 #define MIPS_ELF_GET_WORD(abfd, ptr) \
268 (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr))
270 /* Put out word-sized data. */
271 #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \
272 (ABI_64_P (abfd) \
273 ? bfd_put_64 (abfd, val, ptr) \
274 : bfd_put_32 (abfd, val, ptr))
276 /* Add a dynamic symbol table-entry. */
277 #ifdef BFD64
278 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
279 (ABI_64_P (elf_hash_table (info)->dynobj) \
280 ? bfd_elf64_add_dynamic_entry (info, tag, val) \
281 : bfd_elf32_add_dynamic_entry (info, tag, val))
282 #else
283 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
284 (ABI_64_P (elf_hash_table (info)->dynobj) \
285 ? (abort (), false) \
286 : bfd_elf32_add_dynamic_entry (info, tag, val))
287 #endif
289 /* The number of local .got entries we reserve. */
290 #define MIPS_RESERVED_GOTNO (2)
292 /* Instructions which appear in a stub. For some reason the stub is
293 slightly different on an SGI system. */
294 #define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000)
295 #define STUB_LW(abfd) \
296 (SGI_COMPAT (abfd) \
297 ? (ABI_64_P (abfd) \
304 #define MIPS_FUNCTION_STUB_SIZE (16)
306 #if 0
307 /* We no longer try to identify particular sections for the .dynsym
308 section. When we do, we wind up crashing if there are other random
309 sections with relocations. */
311 /* Names of sections which appear in the .dynsym section in an Irix 5
312 executable. */
315 {
324 NULL
325 };
327 #define SIZEOF_MIPS_DYNSYM_SECNAMES \
328 (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0])
330 /* The number of entries in mips_elf_dynsym_sec_names which go in the
331 text segment. */
333 #define MIPS_TEXT_DYNSYM_SECNO (3)
337 /* The names of the runtime procedure table symbols used on Irix 5. */
340 {
344 NULL
345 };
347 /* These structures are used to generate the .compact_rel section on
348 Irix 5. */
351 {
361 {
371 {
381 {
390 {
397 {
402 /* These are the constants used to swap the bitfields in a crinfo. */
404 #define CRINFO_CTYPE (0x1)
405 #define CRINFO_CTYPE_SH (31)
406 #define CRINFO_RTYPE (0xf)
407 #define CRINFO_RTYPE_SH (27)
408 #define CRINFO_DIST2TO (0xff)
409 #define CRINFO_DIST2TO_SH (19)
410 #define CRINFO_RELVADDR (0x7ffff)
411 #define CRINFO_RELVADDR_SH (0)
413 /* A compact relocation info has long (3 words) or short (2 words)
414 formats. A short format doesn't have VADDR field and relvaddr
415 fields contains ((VADDR - vaddr of the previous entry) >> 2). */
416 #define CRF_MIPS_LONG 1
417 #define CRF_MIPS_SHORT 0
419 /* There are 4 types of compact relocation at least. The value KONST
420 has different meaning for each type:
422 (type) (konst)
423 CT_MIPS_REL32 Address in data
424 CT_MIPS_WORD Address in word (XXX)
425 CT_MIPS_GPHI_LO GP - vaddr
426 CT_MIPS_JMPAD Address to jump
427 */
429 #define CRT_MIPS_REL32 0xa
430 #define CRT_MIPS_WORD 0xb
431 #define CRT_MIPS_GPHI_LO 0xc
432 #define CRT_MIPS_JMPAD 0xd
434 #define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
435 #define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
436 #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
437 #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
439 static void bfd_elf32_swap_compact_rel_out
441 static void bfd_elf32_swap_crinfo_out
446 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
447 from smaller values. Start with zero, widen, *then* decrement. */
448 #define MINUS_ONE (((bfd_vma)0) - 1)
451 {
452 /* No relocation. */
467 /* 16 bit relocation. */
482 /* 32 bit relocation. */
497 /* 32 bit symbol relative relocation. */
512 /* 26 bit branch address. */
520 /* This needs complex overflow
521 detection, because the upper four
522 bits must match the PC. */
530 /* High 16 bits of symbol value. */
545 /* Low 16 bits of symbol value. */
560 /* GP relative reference. */
575 /* Reference to literal section. */
590 /* Reference to global offset table. */
605 /* 16 bit PC relative reference. */
620 /* 16 bit call through global offset table. */
635 /* 32 bit GP relative reference. */
650 /* The remaining relocs are defined on Irix 5, although they are
651 not defined by the ABI. */
656 /* A 5 bit shift field. */
671 /* A 6 bit shift field. */
672 /* FIXME: This is not handled correctly; a special function is
673 needed to put the most significant bit in the right place. */
688 /* A 64 bit relocation. */
703 /* Displacement in the global offset table. */
718 /* Displacement to page pointer in the global offset table. */
733 /* Offset from page pointer in the global offset table. */
748 /* High 16 bits of displacement in global offset table. */
763 /* Low 16 bits of displacement in global offset table. */
778 /* 64 bit subtraction. Used in the N32 ABI. */
793 /* Used to cause the linker to insert and delete instructions? */
798 /* Get the higher value of a 64 bit addend. */
813 /* Get the highest value of a 64 bit addend. */
828 /* High 16 bits of displacement in global offset table. */
843 /* Low 16 bits of displacement in global offset table. */
858 /* Section displacement. */
878 /* Protected jump conversion. This is an optimization hint. No
879 relocation is required for correctness. */
893 };
895 /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This
896 is a hack to make the linker think that we need 64 bit values. */
912 /* The reloc used for the mips16 jump instruction. */
921 /* This needs complex overflow
922 detection, because the upper four
923 bits must match the PC. */
931 /* The reloc used for the mips16 gprel instruction. */
948 /* GNU extensions for embedded-pic. */
949 /* High 16 bits of symbol value, pc-relative. */
965 /* Low 16 bits of symbol value, pc-relative. */
981 /* 16 bit offset for pc-relative branches. */
997 /* 64 bit pc-relative. */
1013 /* 32 bit pc-relative. */
1029 /* GNU extension to record C++ vtable hierarchy */
1045 /* GNU extension to record C++ vtable member usage */
1061 /* Do a R_MIPS_HI16 relocation. This has to be done in combination
1062 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
1063 the HI16. Here we just save the information we need; we do the
1064 actual relocation when we see the LO16. MIPS ELF requires that the
1065 LO16 immediately follow the HI16. As a GNU extension, we permit an
1066 arbitrary number of HI16 relocs to be associated with a single LO16
1067 reloc. This extension permits gcc to output the HI and LO relocs
1068 itself. */
1070 struct mips_hi16
1071 {
1074 bfd_vma addend;
1075 };
1077 /* FIXME: This should not be a static variable. */
1081 bfd_reloc_status_type
1083 reloc_entry,
1084 symbol,
1085 data,
1086 input_section,
1087 output_bfd,
1088 error_message)
1092 PTR data;
1096 {
1097 bfd_reloc_status_type ret;
1098 bfd_vma relocation;
1101 /* If we're relocating, and this an external symbol, we don't want
1102 to change anything. */
1106 {
1109 }
1114 {
1115 boolean relocateable;
1116 bfd_vma gp;
1123 else
1124 {
1127 }
1135 }
1136 else
1137 {
1144 else
1146 }
1155 /* Save the information, and let LO16 do the actual relocation. */
1168 }
1170 /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1171 inplace relocation; this function exists in order to do the
1172 R_MIPS_HI16 relocation described above. */
1174 bfd_reloc_status_type
1176 reloc_entry,
1177 symbol,
1178 data,
1179 input_section,
1180 output_bfd,
1181 error_message)
1185 PTR data;
1189 {
1190 arelent gp_disp_relent;
1193 {
1198 {
1204 /* Do the HI16 relocation. Note that we actually don't need
1205 to know anything about the LO16 itself, except where to
1206 find the low 16 bits of the addend needed by the LO16. */
1213 /* The low order 16 bits are always treated as a signed
1214 value. Therefore, a negative value in the low order bits
1215 requires an adjustment in the high order bits. We need
1216 to make this adjustment in two ways: once for the bits we
1217 took from the data, and once for the bits we are putting
1218 back in to the data. */
1228 {
1232 }
1237 }
1240 }
1242 {
1243 bfd_reloc_status_type ret;
1246 /* FIXME: Does this case ever occur? */
1263 }
1265 /* Now do the LO16 reloc in the usual way. */
1268 }
1270 /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1271 table used for PIC code. If the symbol is an external symbol, the
1272 instruction is modified to contain the offset of the appropriate
1273 entry in the global offset table. If the symbol is a section
1274 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1275 addends are combined to form the real addend against the section
1276 symbol; the GOT16 is modified to contain the offset of an entry in
1277 the global offset table, and the LO16 is modified to offset it
1278 appropriately. Thus an offset larger than 16 bits requires a
1279 modified value in the global offset table.
1281 This implementation suffices for the assembler, but the linker does
1282 not yet know how to create global offset tables. */
1284 bfd_reloc_status_type
1286 reloc_entry,
1287 symbol,
1288 data,
1289 input_section,
1290 output_bfd,
1291 error_message)
1295 PTR data;
1299 {
1300 /* If we're relocating, and this an external symbol, we don't want
1301 to change anything. */
1305 {
1308 }
1310 /* If we're relocating, and this is a local symbol, we can handle it
1311 just like HI16. */
1318 }
1320 /* Set the GP value for OUTPUT_BFD. Returns false if this is a
1321 dangerous relocation. */
1323 static boolean
1327 {
1332 /* If we've already figured out what GP will be, just return it. */
1340 /* The linker script will have created a symbol named `_gp' with the
1341 appropriate value. */
1344 else
1345 {
1347 {
1352 {
1356 }
1357 }
1358 }
1361 {
1362 /* Only get the error once. */
1366 }
1369 }
1371 /* We have to figure out the gp value, so that we can adjust the
1372 symbol value correctly. We look up the symbol _gp in the output
1373 BFD. If we can't find it, we're stuck. We cache it in the ELF
1374 target data. We don't need to adjust the symbol value for an
1375 external symbol if we are producing relocateable output. */
1377 static bfd_reloc_status_type
1381 boolean relocateable;
1384 {
1387 {
1390 }
1394 && (! relocateable
1396 {
1398 {
1399 /* Make up a value. */
1402 }
1404 {
1408 }
1409 }
1412 }
1414 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1415 become the offset from the gp register. This function also handles
1416 R_MIPS_LITERAL relocations, although those can be handled more
1417 cleverly because the entries in the .lit8 and .lit4 sections can be
1418 merged. */
1424 bfd_reloc_status_type
1430 PTR data;
1434 {
1435 boolean relocateable;
1436 bfd_reloc_status_type ret;
1437 bfd_vma gp;
1439 /* If we're relocating, and this is an external symbol with no
1440 addend, we don't want to change anything. We will only have an
1441 addend if this is a newly created reloc, not read from an ELF
1442 file. */
1446 {
1449 }
1453 else
1454 {
1457 }
1466 }
1468 static bfd_reloc_status_type
1470 gp)
1475 boolean relocateable;
1476 PTR data;
1477 bfd_vma gp;
1478 {
1479 bfd_vma relocation;
1485 else
1496 /* Set val to the offset into the section or symbol. */
1498 {
1499 /* This case occurs with the 64-bit MIPS ELF ABI. */
1501 }
1502 else
1503 {
1507 }
1509 /* Adjust val for the final section location and GP value. If we
1510 are producing relocateable output, we don't want to do this for
1511 an external symbol. */
1522 /* Make sure it fit in 16 bits. */
1527 }
1529 /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset
1530 from the gp register? XXX */
1536 bfd_reloc_status_type
1538 reloc_entry,
1539 symbol,
1540 data,
1541 input_section,
1542 output_bfd,
1543 error_message)
1547 PTR data;
1551 {
1552 boolean relocateable;
1553 bfd_reloc_status_type ret;
1554 bfd_vma gp;
1556 /* If we're relocating, and this is an external symbol with no
1557 addend, we don't want to change anything. We will only have an
1558 addend if this is a newly created reloc, not read from an ELF
1559 file. */
1563 {
1567 }
1570 {
1573 }
1574 else
1575 {
1583 }
1587 }
1589 static bfd_reloc_status_type
1591 gp)
1596 boolean relocateable;
1597 PTR data;
1598 bfd_vma gp;
1599 {
1600 bfd_vma relocation;
1605 else
1615 {
1616 /* This case arises with the 64-bit MIPS ELF ABI. */
1618 }
1619 else
1622 /* Set val to the offset into the section or symbol. */
1625 /* Adjust val for the final section location and GP value. If we
1626 are producing relocateable output, we don't want to do this for
1627 an external symbol. */
1638 }
1640 /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are
1641 generated when addreses are 64 bits. The upper 32 bits are a simle
1642 sign extension. */
1644 static bfd_reloc_status_type
1650 PTR data;
1654 {
1655 bfd_reloc_status_type r;
1656 arelent reloc32;
1658 bfd_size_type addr;
1665 /* Do a normal 32 bit relocation on the lower 32 bits. */
1673 /* Sign extend into the upper 32 bits. */
1677 else
1685 }
1687 /* Handle a mips16 jump. */
1689 static bfd_reloc_status_type
1695 PTR data ATTRIBUTE_UNUSED;
1699 {
1703 {
1706 }
1708 /* FIXME. */
1709 {
1717 }
1720 }
1722 /* Handle a mips16 GP relative reloc. */
1724 static bfd_reloc_status_type
1730 PTR data;
1734 {
1735 boolean relocateable;
1736 bfd_reloc_status_type ret;
1737 bfd_vma gp;
1741 /* If we're relocating, and this is an external symbol with no
1742 addend, we don't want to change anything. We will only have an
1743 addend if this is a newly created reloc, not read from an ELF
1744 file. */
1748 {
1751 }
1755 else
1756 {
1759 }
1769 /* Pick up the mips16 extend instruction and the real instruction. */
1773 /* Stuff the current addend back as a 32 bit value, do the usual
1774 relocation, and then clean up. */
1796 }
1798 /* Return the ISA for a MIPS e_flags value. */
1802 flagword flags;
1803 {
1805 {
1814 }
1816 }
1818 /* Return the MACH for a MIPS e_flags value. */
1822 flagword flags;
1823 {
1825 {
1843 {
1860 }
1861 }
1864 }
1866 /* Return printable name for ABI. */
1871 {
1872 flagword flags;
1881 {
1894 }
1895 }
1897 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1900 bfd_reloc_code_real_type bfd_reloc_val;
1902 };
1905 {
1927 };
1929 /* Given a BFD reloc type, return a howto structure. */
1934 bfd_reloc_code_real_type code;
1935 {
1939 {
1942 }
1945 {
1951 /* We need to handle BFD_RELOC_CTOR specially.
1952 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the
1953 size of addresses on this architecture. */
1956 else
1977 }
1978 }
1980 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
1985 {
1987 {
2020 }
2021 }
2023 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
2025 static void
2030 {
2036 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
2037 value for the object file. We get the addend now, rather than
2038 when we do the relocation, because the symbol manipulations done
2039 by the linker may cause us to lose track of the input BFD. */
2044 }
2046 /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */
2048 static void
2053 {
2054 /* Since an Elf32_Internal_Rel is an initial prefix of an
2055 Elf32_Internal_Rela, we can just use mips_info_to_howto_rel
2056 above. */
2059 /* If we ever need to do any extra processing with dst->r_addend
2060 (the field omitted in an Elf32_Internal_Rel) we can do it here. */
2061 }
2062 \f
2063 /* A .reginfo section holds a single Elf32_RegInfo structure. These
2064 routines swap this structure in and out. They are used outside of
2065 BFD, so they are globally visible. */
2067 void
2072 {
2079 }
2081 void
2086 {
2099 }
2101 /* In the 64 bit ABI, the .MIPS.options section holds register
2102 information in an Elf64_Reginfo structure. These routines swap
2103 them in and out. They are globally visible because they are used
2104 outside of BFD. These routines are here so that gas can call them
2105 without worrying about whether the 64 bit ABI has been included. */
2107 void
2112 {
2120 }
2122 void
2127 {
2142 }
2144 /* Swap an entry in a .gptab section. Note that these routines rely
2145 on the equivalence of the two elements of the union. */
2147 static void
2152 {
2155 }
2157 static void
2162 {
2167 }
2169 static void
2174 {
2181 }
2183 static void
2188 {
2198 }
2200 /* Swap in an options header. */
2202 void
2207 {
2212 }
2214 /* Swap out an options header. */
2216 void
2221 {
2226 }
2227 #if 0
2228 /* Swap in an MSYM entry. */
2230 static void
2235 {
2238 }
2239 #endif
2240 /* Swap out an MSYM entry. */
2242 static void
2247 {
2250 }
2252 \f
2253 /* Determine whether a symbol is global for the purposes of splitting
2254 the symbol table into global symbols and local symbols. At least
2255 on Irix 5, this split must be between section symbols and all other
2256 symbols. On most ELF targets the split is between static symbols
2257 and externally visible symbols. */
2259 /*ARGSUSED*/
2260 static boolean
2264 {
2266 }
2267 \f
2268 /* Set the right machine number for a MIPS ELF file. This is used for
2269 both the 32-bit and the 64-bit ABI. */
2271 boolean
2274 {
2275 /* Irix 5 and 6 is broken. Object file symbol tables are not always
2276 sorted correctly such that local symbols precede global symbols,
2277 and the sh_info field in the symbol table is not always right. */
2283 }
2285 /* The final processing done just before writing out a MIPS ELF object
2286 file. This gets the MIPS architecture right based on the machine
2287 number. This is used by both the 32-bit and the 64-bit ABI. */
2289 /*ARGSUSED*/
2290 void
2293 boolean linker ATTRIBUTE_UNUSED;
2294 {
2302 {
2340 }
2345 /* Set the sh_info field for .gptab sections and other appropriate
2346 info for each special section. */
2350 {
2352 {
2398 else
2399 {
2403 (name
2405 }
2410 }
2411 }
2412 }
2413 \f
2414 /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
2416 boolean
2419 flagword flags;
2420 {
2427 }
2429 /* Copy backend specific data from one object module to another */
2431 boolean
2435 {
2448 }
2450 /* Merge backend specific data from an object file to the output
2451 object file when linking. */
2453 boolean
2457 {
2458 flagword old_flags;
2459 flagword new_flags;
2460 boolean ok;
2462 /* Check if we have the same endianess */
2475 {
2483 {
2487 }
2490 }
2492 /* Check flag compatibility. */
2503 {
2510 }
2513 {
2520 }
2522 /* Compare the ISA's. */
2525 {
2531 /* If either has no machine specified, just compare the general isa's.
2532 Some combinations of machines are ok, if the isa's match. */
2534 || ! old_mach
2536 )
2537 {
2538 /* Don't warn about mixing -mips1 and -mips2 code, or mixing -mips3
2539 and -mips4 code. They will normally use the same data sizes and
2540 calling conventions. */
2545 {
2550 }
2551 }
2553 else
2554 {
2561 }
2565 }
2567 /* Compare ABI's. The 64-bit ABI does not use EF_MIPS_ABI. But, it
2568 does set EI_CLASS differently from any 32-bit ABI. */
2572 {
2573 /* Only error if both are set (to different values). */
2577 {
2584 }
2587 }
2589 /* Warn about any other mismatches */
2591 {
2597 }
2600 {
2603 }
2606 }
2607 \f
2608 boolean
2611 PTR ptr;
2612 {
2617 /* Print normal ELF private data. */
2620 /* xgettext:c-format */
2637 else
2648 else
2653 else
2659 }
2660 \f
2661 /* Handle a MIPS specific section when reading an object file. This
2662 is called when elfcode.h finds a section with an unknown type.
2663 This routine supports both the 32-bit and 64-bit ELF ABI.
2665 FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
2666 how to. */
2668 boolean
2673 {
2676 /* There ought to be a place to keep ELF backend specific flags, but
2677 at the moment there isn't one. We just keep track of the
2678 sections by their name, instead. Fortunately, the ABI gives
2679 suggested names for all the MIPS specific sections, so we will
2680 probably get away with this. */
2682 {
2742 }
2748 {
2754 }
2756 /* FIXME: We should record sh_info for a .gptab section. */
2758 /* For a .reginfo section, set the gp value in the tdata information
2759 from the contents of this section. We need the gp value while
2760 processing relocs, so we just get it now. The .reginfo section
2761 is not used in the 64-bit MIPS ELF ABI. */
2763 {
2764 Elf32_External_RegInfo ext;
2765 Elf32_RegInfo s;
2772 }
2774 /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
2775 set the gp value based on what we find. We may see both
2776 SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
2777 they should agree. */
2779 {
2787 {
2790 }
2794 {
2795 Elf_Internal_Options intopt;
2800 {
2801 Elf64_Internal_RegInfo intreg;
2803 bfd_mips_elf64_swap_reginfo_in
2809 }
2811 {
2812 Elf32_RegInfo intreg;
2814 bfd_mips_elf32_swap_reginfo_in
2820 }
2822 }
2824 }
2827 }
2829 /* Set the correct type for a MIPS ELF section. We do this by the
2830 section name, which is a hack, but ought to work. This routine is
2831 used by both the 32-bit and the 64-bit ABI. */
2833 boolean
2838 {
2844 {
2847 /* The sh_link field is set in final_write_processing. */
2848 }
2852 {
2855 /* The sh_info field is set in final_write_processing. */
2856 }
2860 {
2862 /* In a shared object on Irix 5.3, the .mdebug section has an
2863 entsize of 0. FIXME: Does this matter? */
2866 else
2868 }
2870 {
2872 /* In a shared object on Irix 5.3, the .reginfo section has an
2873 entsize of 0x18. FIXME: Does this matter? */
2876 else
2878 }
2883 {
2885 #if 0
2886 /* This isn't how the Irix 6 linker behaves. */
2888 #endif
2889 }
2898 {
2901 }
2903 {
2906 /* The sh_info field is set in final_write_processing. */
2907 }
2909 {
2913 }
2917 {
2919 /* The sh_link and sh_info fields are set in
2920 final_write_processing. */
2921 }
2925 {
2928 /* The sh_link field is set in final_write_processing. */
2929 }
2931 {
2935 }
2937 /* The generic elf_fake_sections will set up REL_HDR using the
2938 default kind of relocations. But, we may actually need both
2939 kinds of relocations, so we set up the second header here. */
2941 {
2946 esd->rel_hdr2
2952 }
2955 }
2957 /* Given a BFD section, try to locate the corresponding ELF section
2958 index. This is used by both the 32-bit and the 64-bit ABI.
2959 Actually, it's not clear to me that the 64-bit ABI supports these,
2960 but for non-PIC objects we will certainly want support for at least
2961 the .scommon section. */
2963 boolean
2969 {
2971 {
2974 }
2976 {
2979 }
2981 }
2983 /* When are writing out the .options or .MIPS.options section,
2984 remember the bytes we are writing out, so that we can install the
2985 GP value in the section_processing routine. */
2987 boolean
2990 sec_ptr section;
2991 PTR location;
2992 file_ptr offset;
2993 bfd_size_type count;
2994 {
2996 {
3000 {
3005 }
3008 {
3009 bfd_size_type size;
3013 else
3019 }
3022 }
3025 count);
3026 }
3028 /* Work over a section just before writing it out. This routine is
3029 used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
3030 sections that need the SHF_MIPS_GPREL flag by name; there has to be
3031 a better way. */
3033 boolean
3037 {
3040 {
3053 }
3059 {
3062 /* We stored the section contents in the elf_section_data tdata
3063 field in the set_section_contents routine. We save the
3064 section contents so that we don't have to read them again.
3065 At this point we know that elf_gp is set, so we can look
3066 through the section contents to see if there is an
3067 ODK_REGINFO structure. */
3073 {
3074 Elf_Internal_Options intopt;
3079 {
3092 }
3094 {
3107 }
3109 }
3110 }
3113 {
3119 {
3122 }
3124 {
3127 }
3129 {
3132 }
3134 {
3137 }
3139 {
3141 {
3147 }
3148 }
3149 }
3152 }
3154 \f
3155 /* MIPS ELF uses two common sections. One is the usual one, and the
3156 other is for small objects. All the small objects are kept
3157 together, and then referenced via the gp pointer, which yields
3158 faster assembler code. This is what we use for the small common
3159 section. This approach is copied from ecoff.c. */
3164 /* MIPS ELF also uses an acommon section, which represents an
3165 allocated common symbol which may be overridden by a
3166 definition in a shared library. */
3171 /* The Irix 5 support uses two virtual sections, which represent
3172 text/data symbols defined in dynamic objects. */
3183 /* Handle the special MIPS section numbers that a symbol may use.
3184 This is used for both the 32-bit and the 64-bit ABI. */
3186 void
3190 {
3195 {
3197 /* This section is used in a dynamically linked executable file.
3198 It is an allocated common section. The dynamic linker can
3199 either resolve these symbols to something in a shared
3200 library, or it can just leave them here. For our purposes,
3201 we can consider these symbols to be in a new section. */
3203 {
3204 /* Initialize the acommon section. */
3214 }
3219 /* Common symbols less than the GP size are automatically
3220 treated as SHN_MIPS_SCOMMON symbols on IRIX5. */
3224 /* Fall through. */
3227 {
3228 /* Initialize the small common section. */
3238 }
3255 #endif
3256 }
3257 }
3258 \f
3259 /* When creating an Irix 5 executable, we need REGINFO and RTPROC
3260 segments. */
3262 int
3265 {
3272 /* See if we need a PT_MIPS_REGINFO segment. */
3277 /* See if we need a PT_MIPS_OPTIONS segment. */
3283 /* See if we need a PT_MIPS_RTPROC segment. */
3290 }
3292 /* Modify the segment map for an Irix 5 executable. */
3294 boolean
3297 {
3304 /* If there is a .reginfo section, we need a PT_MIPS_REGINFO
3305 segment. */
3308 {
3313 {
3322 /* We want to put it after the PHDR and INTERP segments. */
3331 }
3332 }
3334 /* For IRIX 6, we don't have .mdebug sections, nor does anything but
3335 .dynamic end up in PT_DYNAMIC. However, we do have to insert a
3336 PT_OPTIONS segement immediately following the program header
3337 table. */
3339 {
3347 {
3350 /* Usually, there's a program header table. But, sometimes
3351 there's not (like when running the `ld' testsuite). So,
3352 if there's no program header table, we just put the
3353 options segement at the end. */
3369 }
3370 }
3371 else
3372 {
3373 /* If there are .dynamic and .mdebug sections, we make a room
3374 for the RTPROC header. FIXME: Rewrite without section names. */
3378 {
3383 {
3392 {
3396 }
3397 else
3398 {
3401 }
3403 /* We want to put it after the DYNAMIC segment. */
3412 }
3413 }
3415 /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic,
3416 .dynstr, .dynsym, and .hash sections, and everything in
3417 between. */
3425 {
3435 {
3438 {
3439 bfd_size_type sz;
3448 }
3449 }
3469 {
3476 {
3479 }
3480 }
3483 }
3484 }
3487 }
3488 \f
3489 /* The structure of the runtime procedure descriptor created by the
3490 loader for use by the static exception system. */
3505 #define cbRPDR sizeof(RPDR)
3506 #define rpdNil ((pRPDR) 0)
3508 /* Swap RPDR (runtime procedure table entry) for output. */
3510 static void ecoff_swap_rpdr_out
3513 static void
3518 {
3519 /* ecoff_put_off was defined in ecoffswap.h. */
3533 #endif
3534 }
3535 \f
3536 /* Read ECOFF debugging information from a .mdebug section into a
3537 ecoff_debug_info structure. */
3539 boolean
3544 {
3564 /* The symbolic header contains absolute file offsets and sizes to
3565 read. */
3566 #define READ(ptr, offset, count, size, type) \
3567 if (symhdr->count == 0) \
3568 debug->ptr = NULL; \
3569 else \
3570 { \
3571 debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
3572 if (debug->ptr == NULL) \
3573 goto error_return; \
3574 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
3575 || (bfd_read (debug->ptr, size, symhdr->count, \
3576 abfd) != size * symhdr->count)) \
3577 goto error_return; \
3578 }
3592 #undef READ
3599 error_return:
3625 }
3626 \f
3627 /* MIPS ELF local labels start with '$', not 'L'. */
3629 /*ARGSUSED*/
3630 static boolean
3634 {
3638 /* On Irix 6, the labels go back to starting with '.', so we accept
3639 the generic ELF local label syntax as well. */
3641 }
3643 /* MIPS ELF uses a special find_nearest_line routine in order the
3644 handle the ECOFF debugging information. */
3646 struct mips_elf_find_line
3647 {
3650 };
3652 boolean
3658 bfd_vma offset;
3662 {
3667 line_ptr))
3672 line_ptr,
3678 {
3679 flagword origflags;
3684 /* If we are called during a link, mips_elf_final_link may have
3685 cleared the SEC_HAS_CONTENTS field. We force it back on here
3686 if appropriate (which it normally will be). */
3693 {
3694 bfd_size_type external_fdr_size;
3702 {
3705 }
3708 {
3711 }
3713 /* Swap in the FDR information. */
3719 {
3722 }
3726 fraw_end = (fraw_src
3733 /* Note that we don't bother to ever free this information.
3734 find_nearest_line is either called all the time, as in
3735 objdump -l, so the information should be saved, or it is
3736 rarely called, as in ld error messages, so the memory
3737 wasted is unimportant. Still, it would probably be a
3738 good idea for free_cached_info to throw it away. */
3739 }
3743 line_ptr))
3744 {
3747 }
3750 }
3752 /* Fall back on the generic ELF find_nearest_line routine. */
3756 line_ptr);
3757 }
3758 \f
3759 /* The mips16 compiler uses a couple of special sections to handle
3760 floating point arguments.
3762 Section names that look like .mips16.fn.FNNAME contain stubs that
3763 copy floating point arguments from the fp regs to the gp regs and
3764 then jump to FNNAME. If any 32 bit function calls FNNAME, the
3765 call should be redirected to the stub instead. If no 32 bit
3766 function calls FNNAME, the stub should be discarded. We need to
3767 consider any reference to the function, not just a call, because
3768 if the address of the function is taken we will need the stub,
3769 since the address might be passed to a 32 bit function.
3771 Section names that look like .mips16.call.FNNAME contain stubs
3772 that copy floating point arguments from the gp regs to the fp
3773 regs and then jump to FNNAME. If FNNAME is a 32 bit function,
3774 then any 16 bit function that calls FNNAME should be redirected
3775 to the stub instead. If FNNAME is not a 32 bit function, the
3776 stub should be discarded.
3778 .mips16.call.fp.FNNAME sections are similar, but contain stubs
3779 which call FNNAME and then copy the return value from the fp regs
3780 to the gp regs. These stubs store the return value in $18 while
3781 calling FNNAME; any function which might call one of these stubs
3782 must arrange to save $18 around the call. (This case is not
3783 needed for 32 bit functions that call 16 bit functions, because
3784 16 bit functions always return floating point values in both
3785 $f0/$f1 and $2/$3.)
3787 Note that in all cases FNNAME might be defined statically.
3788 Therefore, FNNAME is not used literally. Instead, the relocation
3789 information will indicate which symbol the section is for.
3791 We record any stubs that we find in the symbol table. */
3797 /* MIPS ELF linker hash table. */
3799 struct mips_elf_link_hash_table
3800 {
3802 #if 0
3803 /* We no longer use this. */
3804 /* String section indices for the dynamic section symbols. */
3806 #endif
3807 /* The number of .rtproc entries. */
3808 bfd_size_type procedure_count;
3809 /* The size of the .compact_rel section (if SGI_COMPAT). */
3810 bfd_size_type compact_rel_size;
3811 /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
3812 entry is set to the address of __rld_obj_head as in Irix 5. */
3813 boolean use_rld_obj_head;
3814 /* This is the value of the __rld_map or __rld_obj_head symbol. */
3815 bfd_vma rld_value;
3816 /* This is set if we see any mips16 stub sections. */
3817 boolean mips16_stubs_seen;
3818 };
3820 /* Look up an entry in a MIPS ELF linker hash table. */
3822 #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
3823 ((struct mips_elf_link_hash_entry *) \
3824 elf_link_hash_lookup (&(table)->root, (string), (create), \
3825 (copy), (follow)))
3827 /* Traverse a MIPS ELF linker hash table. */
3829 #define mips_elf_link_hash_traverse(table, func, info) \
3830 (elf_link_hash_traverse \
3831 (&(table)->root, \
3832 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
3833 (info)))
3835 /* Get the MIPS ELF linker hash table from a link_info structure. */
3837 #define mips_elf_hash_table(p) \
3838 ((struct mips_elf_link_hash_table *) ((p)->hash))
3840 static boolean mips_elf_output_extsym
3843 /* Create an entry in a MIPS ELF linker hash table. */
3850 {
3854 /* Allocate the structure if it has not already been allocated by a
3855 subclass. */
3863 /* Call the allocation method of the superclass. */
3868 {
3869 /* Set local fields. */
3871 /* We use -2 as a marker to indicate that the information has
3872 not been set. -1 means there is no associated ifd. */
3880 }
3883 }
3885 /* Create a MIPS ELF linker hash table. */
3890 {
3899 mips_elf_link_hash_newfunc))
3900 {
3903 }
3905 #if 0
3906 /* We no longer use this. */
3909 #endif
3917 }
3919 /* Hook called by the linker routine which adds symbols from an object
3920 file. We must handle the special MIPS section numbers here. */
3922 /*ARGSUSED*/
3923 boolean
3932 {
3936 {
3937 /* Skip Irix 5 rld entry name. */
3940 }
3943 {
3945 /* Common symbols less than the GP size are automatically
3946 treated as SHN_MIPS_SCOMMON symbols. */
3950 /* Fall through. */
3958 /* This section is used in a shared object. */
3960 {
3961 /* Initialize the section. */
3972 }
3973 /* This code used to do *secp = bfd_und_section_ptr if
3974 info->shared. I don't know why, and that doesn't make sense,
3975 so I took it out. */
3980 /* Fall through. XXX Can we treat this as allocated data? */
3982 /* This section is used in a shared object. */
3984 {
3985 /* Initialize the section. */
3996 }
3997 /* This code used to do *secp = bfd_und_section_ptr if
3998 info->shared. I don't know why, and that doesn't make sense,
3999 so I took it out. */
4006 }
4012 {
4015 /* Mark __rld_obj_head as dynamic. */
4031 }
4033 /* If this is a mips16 text symbol, add 1 to the value to make it
4034 odd. This will cause something like .word SYM to come up with
4035 the right value when it is loaded into the PC. */
4040 }
4042 /* Structure used to pass information to mips_elf_output_extsym. */
4044 struct extsym_info
4045 {
4050 boolean failed;
4051 };
4053 /* This routine is used to write out ECOFF debugging external symbol
4054 information. It is called via mips_elf_link_hash_traverse. The
4055 ECOFF external symbol information must match the ELF external
4056 symbol information. Unfortunately, at this point we don't know
4057 whether a symbol is required by reloc information, so the two
4058 tables may wind up being different. We must sort out the external
4059 symbol information before we can set the final size of the .mdebug
4060 section, and we must set the size of the .mdebug section before we
4061 can relocate any sections, and we can't know which symbols are
4062 required by relocation until we relocate the sections.
4063 Fortunately, it is relatively unlikely that any symbol will be
4064 stripped but required by a reloc. In particular, it can not happen
4065 when generating a final executable. */
4067 static boolean
4070 PTR data;
4071 {
4073 boolean strip;
4089 else
4096 {
4108 {
4111 /* Use undefined class. Also, set class and type for some
4112 special symbols. */
4116 {
4120 }
4122 {
4127 }
4129 {
4133 }
4134 else
4136 }
4140 else
4141 {
4147 /* When making a shared library and symbol h is the one from
4148 the another shared library, OUTPUT_SECTION may be null. */
4151 else
4152 {
4172 else
4174 }
4175 }
4179 }
4185 {
4197 else
4199 }
4201 {
4202 /* Set type and value for a symbol with a function stub. */
4207 else
4208 {
4214 else
4216 }
4219 #endif
4220 }
4225 {
4228 }
4231 }
4233 /* Create a runtime procedure table from the .mdebug section. */
4235 static boolean
4237 PTR handle;
4242 {
4247 PTR rtproc;
4255 PDR pdr;
4256 SYMR sym;
4270 {
4307 {
4321 }
4322 }
4328 {
4331 }
4337 erp++;
4342 {
4346 }
4349 /* Set the size and contents of .rtproc section. */
4353 /* Skip this section later on (I don't think this currently
4354 matters, but someday it might). */
4370 error_return:
4382 }
4384 /* A comparison routine used to sort .gptab entries. */
4386 static int
4390 {
4395 }
4397 /* We need to use a special link routine to handle the .reginfo and
4398 the .mdebug sections. We need to merge all instances of these
4399 sections together, not write them all out sequentially. */
4401 boolean
4405 {
4411 Elf32_RegInfo reginfo;
4418 /* If all the things we linked together were PIC, but we're
4419 producing an executable (rather than a shared object), then the
4420 resulting file is CPIC (i.e., it calls PIC code.) */
4424 {
4427 }
4429 /* We'd carefully arranged the dynamic symbol indices, and then the
4430 generic size_dynamic_sections renumbered them out from under us.
4431 Rather than trying somehow to prevent the renumbering, just do
4432 the sort again. */
4434 {
4439 /* When we resort, we must tell mips_elf_sort_hash_table what
4440 the lowest index it may use is. That's the number of section
4441 symbols we're going to add. The generic ELF linker only
4442 adds these symbols when building a shared object. Note that
4443 we count the sections after (possibly) removing the .options
4444 section above. */
4450 /* Make sure we didn't grow the global .got region. */
4459 }
4461 /* On IRIX5, we omit the .options section. On IRIX6, however, we
4462 include it, even though we don't process it quite right. (Some
4463 entries are supposed to be merged.) Empirically, we seem to be
4464 better off including it then not. */
4467 {
4469 {
4478 }
4479 }
4481 /* Get a value for the GP register. */
4483 {
4493 {
4494 bfd_vma lo;
4496 /* Find the GP-relative section with the lowest offset. */
4503 /* And calculate GP relative to that. */
4505 }
4506 else
4507 {
4508 /* If the relocate_section function needs to do a reloc
4509 involving the GP value, it should make a reloc_dangerous
4510 callback to warn that GP is not defined. */
4511 }
4512 }
4514 /* Go through the sections and collect the .reginfo and .mdebug
4515 information. */
4521 {
4523 {
4526 /* We have found the .reginfo section in the output file.
4527 Look through all the link_orders comprising it and merge
4528 the information together. */
4532 {
4535 Elf32_External_RegInfo ext;
4536 Elf32_RegInfo sub;
4539 {
4543 }
4548 /* The linker emulation code has probably clobbered the
4549 size to be zero bytes. */
4567 /* ri_gp_value is set by the function
4568 mips_elf32_section_processing when the section is
4569 finally written out. */
4571 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4572 elf_link_input_bfd ignores this section. */
4574 }
4576 /* Size has been set in mips_elf_always_size_sections */
4579 /* Skip this section later on (I don't think this currently
4580 matters, but someday it might). */
4584 }
4587 {
4590 /* We have found the .mdebug section in the output file.
4591 Look through all the link_orders comprising it and merge
4592 the information together. */
4594 /* FIXME: What should the version stamp be? */
4609 /* We accumulate the debugging information itself in the
4610 debug_info structure. */
4628 {
4630 EXTR esym;
4631 bfd_vma last;
4650 {
4654 {
4657 }
4658 else
4664 }
4665 }
4670 {
4679 {
4683 }
4691 {
4692 /* I don't know what a non MIPS ELF bfd would be
4693 doing with a .mdebug section, but I don't really
4694 want to deal with it. */
4696 }
4703 /* The ECOFF linking code expects that we have already
4704 read in the debugging information and set up an
4705 ecoff_debug_info structure, so we do that now. */
4715 /* Loop through the external symbols. For each one with
4716 interesting information, try to find the symbol in
4717 the linker global hash table and save the information
4718 for the output external symbols. */
4720 eraw_end = (eraw_src
4726 {
4727 EXTR ext;
4744 {
4748 }
4751 }
4753 /* Free up the information we just read. */
4766 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4767 elf_link_input_bfd ignores this section. */
4769 }
4772 {
4773 /* Create .rtproc section. */
4776 {
4785 }
4790 }
4792 /* Build the external symbol information. */
4799 mips_elf_output_extsym,
4804 /* Set the size of the .mdebug section. */
4807 /* Skip this section later on (I don't think this currently
4808 matters, but someday it might). */
4812 }
4815 {
4822 /* The .gptab.sdata and .gptab.sbss sections hold
4823 information describing how the small data area would
4824 change depending upon the -G switch. These sections
4825 not used in executables files. */
4827 {
4833 {
4837 {
4841 }
4845 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4846 elf_link_input_bfd ignores this section. */
4848 }
4850 /* Skip this section later on (I don't think this
4851 currently matters, but someday it might). */
4854 /* Really remove the section. */
4858 ;
4863 }
4865 /* There is one gptab for initialized data, and one for
4866 uninitialized data. */
4871 else
4872 {
4878 }
4880 /* The linker script always combines .gptab.data and
4881 .gptab.sdata into .gptab.sdata, and likewise for
4882 .gptab.bss and .gptab.sbss. It is possible that there is
4883 no .sdata or .sbss section in the output file, in which
4884 case we must change the name of the output section. */
4887 {
4890 else
4894 }
4896 /* Set up the first entry. */
4904 /* Combine the input sections. */
4908 {
4911 bfd_size_type size;
4913 bfd_size_type gpentry;
4916 {
4920 }
4925 /* Combine the gptab entries for this input section one
4926 by one. We know that the input gptab entries are
4927 sorted by ascending -G value. */
4933 {
4934 Elf32_External_gptab ext_gptab;
4935 Elf32_gptab int_gptab;
4938 boolean exact;
4944 {
4947 }
4956 {
4962 }
4965 {
4969 /* We need a new table entry. */
4974 {
4977 }
4982 /* Merge in the size for the next smallest -G
4983 value, since that will be implied by this new
4984 value. */
4987 {
4993 }
4999 }
5002 }
5004 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5005 elf_link_input_bfd ignores this section. */
5007 }
5009 /* The table must be sorted by -G value. */
5013 /* Swap out the table. */
5017 {
5020 }
5029 /* Skip this section later on (I don't think this currently
5030 matters, but someday it might). */
5032 }
5033 }
5035 /* Invoke the regular ELF backend linker to do all the work. */
5037 {
5038 #ifdef BFD64
5041 #else
5045 }
5049 /* Now write out the computed sections. */
5052 {
5053 Elf32_External_RegInfo ext;
5059 }
5062 {
5070 }
5073 {
5079 }
5082 {
5088 }
5091 {
5094 {
5100 }
5101 }
5104 }
5106 /* Returns the GOT section for ABFD. */
5111 {
5113 }
5115 /* Returns the GOT information associated with the link indicated by
5116 INFO. If SGOTP is non-NULL, it is filled in with the GOT
5117 section. */
5123 {
5136 }
5138 /* Return whether a relocation is against a local symbol. */
5140 static boolean
5145 {
5153 else
5154 {
5155 /* The symbol table does not follow the rule that local symbols
5156 must come before globals. */
5158 }
5159 }
5161 /* Sign-extend VALUE, which has the indicated number of BITS. */
5163 static bfd_vma
5165 bfd_vma value;
5167 {
5169 /* VALUE is negative. */
5173 }
5175 /* Return non-zero if the indicated VALUE has overflowed the maximum
5176 range expressable by a signed number with the indicated number of
5177 BITS. */
5179 static boolean
5181 bfd_vma value;
5183 {
5187 /* The value is too big. */
5190 /* The value is too small. */
5193 /* All is well. */
5195 }
5197 /* Calculate the %high function. */
5199 static bfd_vma
5201 bfd_vma value;
5202 {
5204 }
5206 /* Calculate the %higher function. */
5208 static bfd_vma
5210 bfd_vma value ATTRIBUTE_UNUSED;
5211 {
5212 #ifdef BFD64
5214 #else
5217 #endif
5218 }
5220 /* Calculate the %highest function. */
5222 static bfd_vma
5224 bfd_vma value ATTRIBUTE_UNUSED;
5225 {
5226 #ifdef BFD64
5228 #else
5231 #endif
5232 }
5234 /* Returns the GOT index for the global symbol indicated by H. */
5236 static bfd_vma
5240 {
5241 bfd_vma index;
5247 /* Once we determine the global GOT entry with the lowest dynamic
5248 symbol table index, we must put all dynamic symbols with greater
5249 indices into the GOT. That makes it easy to calculate the GOT
5250 offset. */
5257 }
5259 /* Returns the offset for the entry at the INDEXth position
5260 in the GOT. */
5262 static bfd_vma
5266 bfd_vma index;
5267 {
5269 bfd_vma gp;
5274 gp);
5275 }
5277 /* If H is a symbol that needs a global GOT entry, but has a dynamic
5278 symbol table index lower than any we've seen to date, record it for
5279 posterity. */
5281 static boolean
5286 {
5287 /* A global symbol in the GOT must also be in the dynamic symbol
5288 table. */
5293 /* If we've already marked this entry as need GOT space, we don't
5294 need to do it again. */
5298 /* By setting this to a value other than -1, we are indicating that
5299 there needs to be a GOT entry for H. */
5303 }
5305 /* This structure is passed to mips_elf_sort_hash_table_f when sorting
5306 the dynamic symbols. */
5308 struct mips_elf_hash_sort_data
5309 {
5310 /* The symbol in the global GOT with the lowest dynamic symbol table
5311 index. */
5313 /* The least dynamic symbol table index corresponding to a symbol
5314 with a GOT entry. */
5316 /* The greatest dynamic symbol table index not corresponding to a
5317 symbol without a GOT entry. */
5319 };
5321 /* If H needs a GOT entry, assign it the highest available dynamic
5322 index. Otherwise, assign it the lowest available dynamic
5323 index. */
5325 static boolean
5328 PTR data;
5329 {
5333 /* Symbols without dynamic symbol table entries aren't interesting
5334 at all. */
5340 else
5341 {
5344 }
5347 }
5349 /* Sort the dynamic symbol table so that symbols that need GOT entries
5350 appear towards the end. This reduces the amount of GOT space
5351 required. MAX_LOCAL is used to set the number of local symbols
5352 known to be in the dynamic symbol table. During
5353 mips_elf_size_dynamic_sections, this value is 1. Afterward, the
5354 section symbols are added and the count is higher. */
5356 static boolean
5360 {
5372 mips_elf_sort_hash_table_f,
5375 /* There shoud have been enough room in the symbol table to
5376 accomodate both the GOT and non-GOT symbols. */
5379 /* Now we know which dynamic symbol has the lowest dynamic symbol
5380 table index in the GOT. */
5385 }
5387 /* Create a local GOT entry for VALUE. Return the index of the entry,
5388 or -1 if it could not be created. */
5390 static bfd_vma
5395 bfd_vma value;
5396 {
5398 {
5399 /* We didn't allocate enough space in the GOT. */
5404 }
5410 }
5412 /* Returns the GOT offset at which the indicated address can be found.
5413 If there is not yet a GOT entry for this value, create one. Returns
5414 -1 if no satisfactory GOT offset can be found. */
5416 static bfd_vma
5420 bfd_vma value;
5421 {
5428 /* Look to see if we already have an appropriate entry. */
5433 {
5437 }
5440 }
5442 /* Find a GOT entry that is within 32KB of the VALUE. These entries
5443 are supposed to be placed at small offsets in the GOT, i.e.,
5444 within 32KB of GP. Return the index into the GOT for this page,
5445 and store the offset from this entry to the desired address in
5446 OFFSETP, if it is non-NULL. */
5448 static bfd_vma
5452 bfd_vma value;
5454 {
5460 bfd_vma address;
5464 /* Look to see if we aleady have an appropriate entry. */
5470 {
5474 {
5475 /* This entry will serve as the page pointer. We can add a
5476 16-bit number to it to get the actual address. */
5479 }
5480 }
5482 /* If we didn't have an appropriate entry, we create one now. */
5487 {
5490 }
5493 }
5495 /* Find a GOT entry whose higher-order 16 bits are the same as those
5496 for value. Return the index into the GOT for this entry. */
5498 static bfd_vma
5502 bfd_vma value;
5503 {
5509 bfd_vma address;
5511 /* Although the ABI says that it is "the high-order 16 bits" that we
5512 want, it is really the %high value. The complete value is
5513 calculated with a `addiu' of a LO16 relocation, just as with a
5514 HI16/LO16 pair. */
5518 /* Look to see if we already have an appropriate entry. */
5524 {
5527 {
5528 /* This entry has the right high-order 16 bits. */
5531 }
5532 }
5534 /* If we didn't have an appropriate entry, we create one now. */
5539 }
5541 /* Returns the first relocation of type r_type found, beginning with
5542 RELOCATION. RELEND is one-past-the-end of the relocation table. */
5549 {
5550 /* According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must be
5551 immediately following. However, for the IRIX6 ABI, the next
5552 relocation may be a composed relocation consisting of several
5553 relocations for the same address. In that case, the R_MIPS_LO16
5554 relocation may occur as one of these. We permit a similar
5555 extension in general, as that is useful for GCC. */
5557 {
5562 }
5564 /* We didn't find it. */
5567 }
5569 /* Create a rel.dyn relocation for the dynamic linker to resolve. REL
5570 is the original relocation, which is now being transformed into a
5571 dyanmic relocation. The ADDENDP is adjusted if necessary; the
5572 caller should store the result in place of the original addend. */
5574 static boolean
5582 bfd_vma symbol;
5585 {
5586 Elf_Internal_Rel outrel;
5587 boolean skip;
5594 sreloc
5601 /* We begin by assuming that the offset for the dynamic relocation
5602 is the same as for the original relocation. We'll adjust this
5603 later to reflect the correct output offsets. */
5606 else
5607 {
5608 /* Except that in a stab section things are more complex.
5609 Because we compress stab information, the offset given in the
5610 relocation may not be the one we want; we must let the stabs
5611 machinery tell us the offset. */
5612 outrel.r_offset
5613 = (_bfd_stab_section_offset
5615 input_section,
5618 /* If we didn't need the relocation at all, this value will be
5619 -1. */
5622 }
5624 /* If we've decided to skip this relocation, just output an emtpy
5625 record. Note that R_MIPS_NONE == 0, so that this call to memset
5626 is a way of setting R_TYPE to R_MIPS_NONE. */
5629 else
5630 {
5632 bfd_vma section_offset;
5634 /* We must now calculate the dynamic symbol table index to use
5635 in the relocation. */
5639 {
5642 }
5643 else
5644 {
5648 {
5651 }
5652 else
5653 {
5657 }
5659 /* Figure out how far the target of the relocation is from
5660 the beginning of its section. */
5662 /* The relocation we're building is section-relative.
5663 Therefore, the original addend must be adjusted by the
5664 section offset. */
5666 /* Now, the relocation is just against the section. */
5668 }
5670 /* If the relocation was previously an absolute relocation, we
5671 must adjust it by the value we give it in the dynamic symbol
5672 table. */
5676 /* The relocation is always an REL32 relocation because we don't
5677 know where the shared library will wind up at load-time. */
5680 /* Adjust the output offset of the relocation to reference the
5681 correct location in the output file. */
5684 }
5686 /* Put the relocation back out. We have to use the special
5687 relocation outputter in the 64-bit case since the 64-bit
5688 relocation format is non-standard. */
5690 {
5695 }
5696 else
5702 /* Record the index of the first relocation referencing H. This
5703 information is later emitted in the .msym section. */
5709 /* We've now added another relocation. */
5712 /* Make sure the output section is writable. The dynamic linker
5713 will be writing to it. */
5717 /* On IRIX5, make an entry of compact relocation info. */
5719 {
5724 {
5725 Elf32_crinfo cptrel;
5733 else
5744 }
5745 }
5748 }
5750 /* Calculate the value produced by the RELOCATION (which comes from
5751 the INPUT_BFD). The ADDEND is the addend to use for this
5752 RELOCATION; RELOCATION->R_ADDEND is ignored.
5754 The result of the relocation calculation is stored in VALUEP.
5755 REQUIRE_JALXP indicates whether or not the opcode used with this
5756 relocation must be JALX.
5758 This function returns bfd_reloc_continue if the caller need take no
5759 further action regarding this relocation, bfd_reloc_notsupported if
5760 something goes dramatically wrong, bfd_reloc_overflow if an
5761 overflow occurs, and bfd_reloc_ok to indicate success. */
5763 static bfd_reloc_status_type
5765 input_bfd,
5766 input_section,
5767 info,
5768 relocation,
5769 addend,
5770 howto,
5771 local_syms,
5772 local_sections,
5773 valuep,
5774 namep,
5775 require_jalxp)
5781 bfd_vma addend;
5788 {
5789 /* The eventual value we will return. */
5790 bfd_vma value;
5791 /* The address of the symbol against which the relocation is
5792 occurring. */
5794 /* The final GP value to be used for the relocatable, executable, or
5795 shared object file being produced. */
5797 /* The place (section offset or address) of the storage unit being
5798 relocated. */
5799 bfd_vma p;
5800 /* The value of GP used to create the relocatable object. */
5802 /* The offset into the global offset table at which the address of
5803 the relocation entry symbol, adjusted by the addend, resides
5804 during execution. */
5806 /* The section in which the symbol referenced by the relocation is
5807 located. */
5810 /* True if the symbol referred to by this relocation is a local
5811 symbol. */
5812 boolean local_p;
5813 /* True if the symbol referred to by this relocation is "_gp_disp". */
5819 /* True if overflow occurred during the calculation of the
5820 relocation value. */
5821 boolean overflowed_p;
5822 /* True if this relocation refers to a MIPS16 function. */
5825 /* Parse the relocation. */
5832 /* Assume that there will be no overflow. */
5835 /* Figure out whether or not the symbol is local, and get the offset
5836 used in the array of hash table entries. */
5839 local_sections);
5842 else
5843 {
5844 /* The symbol table does not follow the rule that local symbols
5845 must come before globals. */
5847 }
5849 /* Figure out the value of the symbol. */
5851 {
5861 /* MIPS16 text labels should be treated as odd. */
5865 /* Record the name of this symbol, for our caller. */
5873 }
5874 else
5875 {
5876 /* For global symbols we look up the symbol in the hash-table. */
5879 /* Find the real hash-table entry for this symbol. */
5884 /* Record the name of this symbol, for our caller. */
5887 /* See if this is the special _gp_disp symbol. Note that such a
5888 symbol must always be a global symbol. */
5890 {
5891 /* Relocations against _gp_disp are permitted only with
5892 R_MIPS_HI16 and R_MIPS_LO16 relocations. */
5897 }
5898 /* If this symbol is defined, calculate its address. Note that
5899 _gp_disp is a magic symbol, always implicitly defined by the
5900 linker, so it's inappropriate to check to see whether or not
5901 its defined. */
5905 {
5911 else
5913 }
5915 /* We allow relocations against undefined weak symbols, giving
5916 it the value zero, so that you can undefined weak functions
5917 and check to see if they exist by looking at their
5918 addresses. */
5924 {
5925 /* If this is a dynamic link, we should have created a
5926 _DYNAMIC_LINK symbol in mips_elf_create_dynamic_sections.
5927 Otherwise, we should define the symbol with a value of 0.
5928 FIXME: It should probably get into the symbol table
5929 somehow as well. */
5933 }
5934 else
5935 {
5943 }
5946 }
5948 /* If this is a 32-bit call to a 16-bit function with a stub, we
5949 need to redirect the call to the stub, unless we're already *in*
5950 a stub. */
5956 {
5957 /* This is a 32-bit call to a 16-bit function. We should
5958 have already noticed that we were going to need the
5959 stub. */
5962 else
5963 {
5966 }
5969 }
5970 /* If this is a 16-bit call to a 32-bit function with a stub, we
5971 need to redirect the call to the stub. */
5976 {
5977 /* If both call_stub and call_fp_stub are defined, we can figure
5978 out which one to use by seeing which one appears in the input
5979 file. */
5981 {
5986 {
5989 {
5992 }
5993 }
5996 }
5999 else
6004 }
6006 /* Calls from 16-bit code to 32-bit code and vice versa require the
6007 special jalx instruction. */
6011 /* If we haven't already determined the GOT offset, or the GP value,
6012 and we're going to need it, get it now. */
6014 {
6022 /* Find the index into the GOT where this value is located. */
6024 {
6026 g = mips_elf_global_got_index
6029 }
6031 /* There's no need to create a local GOT entry here; the
6032 calculation for a local GOT16 entry does not involve G. */
6034 else
6035 {
6039 }
6041 /* Convert GOT indices to actual offsets. */
6057 }
6059 /* Figure out what kind of relocation is being performed. */
6061 {
6079 {
6080 /* If we're creating a shared library, or this relocation is
6081 against a symbol in a shared library, then we can't know
6082 where the symbol will end up. So, we create a relocation
6083 record in the output, and leave the job up to the dynamic
6084 linker. */
6087 info,
6088 relocation,
6089 h,
6090 sec,
6091 symbol,
6093 input_section))
6095 }
6096 else
6097 {
6100 else
6102 }
6125 /* The calculation for R_MIPS_26 is just the same as for an
6126 R_MIPS_26. It's only the storage of the relocated field into
6127 the output file that's different. That's handled in
6128 mips_elf_perform_relocation. So, we just fall through to the
6129 R_MIPS_26 case here. */
6133 else
6140 {
6143 }
6144 else
6145 {
6148 }
6154 else
6155 {
6157 /* The MIPS ABI requires checking the R_MIPS_LO16 relocation
6158 for overflow. But, on, say, Irix 5, relocations against
6159 _gp_disp are normally generated from the .cpload
6160 pseudo-op. It generates code that normally looks like
6161 this:
6163 lui $gp,%hi(_gp_disp)
6164 addiu $gp,$gp,%lo(_gp_disp)
6165 addu $gp,$gp,$t9
6167 Here $t9 holds the address of the function being called,
6168 as required by the MIPS ELF ABI. The R_MIPS_LO16
6169 relocation can easily overflow in this situation, but the
6170 R_MIPS_HI16 relocation will handle the overflow.
6171 Therefore, we consider this a bug in the MIPS ABI, and do
6172 not check for overflow here. */
6173 }
6177 /* Because we don't merge literal sections, we can handle this
6178 just like R_MIPS_GPREL16. In the long run, we should merge
6179 shared literals, and then we will need to additional work
6180 here. */
6182 /* Fall through. */
6185 /* The R_MIPS16_GPREL performs the same calculation as
6186 R_MIPS_GPREL16, but stores the relocated bits in a different
6187 order. We don't need to do anything special here; the
6188 differences are handled in mips_elf_perform_relocation. */
6192 else
6199 {
6203 value
6205 abfd,
6206 value);
6209 }
6211 /* Fall through. */
6231 /* We're allowed to handle these two relocations identically.
6232 The dynamic linker is allowed to handle the CALL relocations
6233 differently by creating a lazy evaluation stub. */
6249 abfd,
6250 value);
6281 /* Both of these may be ignored. R_MIPS_JALR is an optimization
6282 hint; we could improve performance by honoring that hint. */
6287 /* We don't do anything with these at present. */
6291 /* An unrecognized relocation type. */
6293 }
6295 /* Store the VALUE for our caller. */
6298 }
6300 /* Obtain the field relocated by RELOCATION. */
6302 static bfd_vma
6308 {
6309 bfd_vma x;
6312 /* Obtain the bytes. */
6318 /* The two 16-bit words will be reversed on a little-endian
6319 system. See mips_elf_perform_relocation for more details. */
6323 }
6325 /* It has been determined that the result of the RELOCATION is the
6326 VALUE. Use HOWTO to place VALUE into the output file at the
6327 appropriate position. The SECTION is the section to which the
6328 relocation applies. If REQUIRE_JALX is true, then the opcode used
6329 for the relocation must be either JAL or JALX, and it is
6330 unconditionally converted to JALX.
6332 Returns false if anything goes wrong. */
6334 static boolean
6341 bfd_vma value;
6345 boolean require_jalx;
6346 {
6347 bfd_vma x;
6351 /* Figure out where the relocation is occurring. */
6354 /* Obtain the current value. */
6357 /* Clear the field we are setting. */
6360 /* If this is the R_MIPS16_26 relocation, we must store the
6361 value in a funny way. */
6363 {
6364 /* R_MIPS16_26 is used for the mips16 jal and jalx instructions.
6365 Most mips16 instructions are 16 bits, but these instructions
6366 are 32 bits.
6368 The format of these instructions is:
6370 +--------------+--------------------------------+
6371 ! JALX ! X! Imm 20:16 ! Imm 25:21 !
6372 +--------------+--------------------------------+
6373 ! Immediate 15:0 !
6374 +-----------------------------------------------+
6376 JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
6377 Note that the immediate value in the first word is swapped.
6379 When producing a relocateable object file, R_MIPS16_26 is
6380 handled mostly like R_MIPS_26. In particular, the addend is
6381 stored as a straight 26-bit value in a 32-bit instruction.
6382 (gas makes life simpler for itself by never adjusting a
6383 R_MIPS16_26 reloc to be against a section, so the addend is
6384 always zero). However, the 32 bit instruction is stored as 2
6385 16-bit values, rather than a single 32-bit value. In a
6386 big-endian file, the result is the same; in a little-endian
6387 file, the two 16-bit halves of the 32 bit value are swapped.
6388 This is so that a disassembler can recognize the jal
6389 instruction.
6391 When doing a final link, R_MIPS16_26 is treated as a 32 bit
6392 instruction stored as two 16-bit values. The addend A is the
6393 contents of the targ26 field. The calculation is the same as
6394 R_MIPS_26. When storing the calculated value, reorder the
6395 immediate value as shown above, and don't forget to store the
6396 value as two 16-bit values.
6398 To put it in MIPS ABI terms, the relocation field is T-targ26-16,
6399 defined as
6401 big-endian:
6402 +--------+----------------------+
6403 | | |
6404 | | targ26-16 |
6405 |31 26|25 0|
6406 +--------+----------------------+
6408 little-endian:
6409 +----------+------+-------------+
6410 | | | |
6411 | sub1 | | sub2 |
6412 |0 9|10 15|16 31|
6413 +----------+--------------------+
6414 where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
6415 ((sub1 << 16) | sub2)).
6417 When producing a relocateable object file, the calculation is
6418 (((A < 2) | (P & 0xf0000000) + S) >> 2)
6419 When producing a fully linked file, the calculation is
6420 let R = (((A < 2) | (P & 0xf0000000) + S) >> 2)
6421 ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) */
6424 /* Shuffle the bits according to the formula above. */
6429 }
6431 {
6432 /* R_MIPS16_GPREL is used for GP-relative addressing in mips16
6433 mode. A typical instruction will have a format like this:
6435 +--------------+--------------------------------+
6436 ! EXTEND ! Imm 10:5 ! Imm 15:11 !
6437 +--------------+--------------------------------+
6438 ! Major ! rx ! ry ! Imm 4:0 !
6439 +--------------+--------------------------------+
6441 EXTEND is the five bit value 11110. Major is the instruction
6442 opcode.
6444 This is handled exactly like R_MIPS_GPREL16, except that the
6445 addend is retrieved and stored as shown in this diagram; that
6446 is, the Imm fields above replace the V-rel16 field.
6448 All we need to do here is shuffle the bits appropriately. As
6449 above, the two 16-bit halves must be swapped on a
6450 little-endian system. */
6454 }
6456 /* Set the field. */
6459 /* If required, turn JAL into JALX. */
6461 {
6462 boolean ok;
6464 bfd_vma jalx_opcode;
6466 /* Check to see if the opcode is already JAL or JALX. */
6468 {
6471 }
6472 else
6473 {
6476 }
6478 /* If the opcode is not JAL or JALX, there's a problem. */
6480 {
6488 }
6490 /* Make this the JALX opcode. */
6492 }
6494 /* Swap the high- and low-order 16 bits on little-endian systems
6495 when doing a MIPS16 relocation. */
6500 /* Put the value into the output. */
6503 }
6505 /* Returns true if SECTION is a MIPS16 stub section. */
6507 static boolean
6511 {
6517 }
6519 /* Relocate a MIPS ELF section. */
6521 boolean
6532 {
6542 {
6544 bfd_vma value;
6546 boolean require_jalx;
6547 /* True if the relocation is a RELA relocation, rather than a
6548 REL relocation. */
6552 /* Find the relocation howto for this relocation. */
6554 {
6555 /* Some 32-bit code uses R_MIPS_64. In particular, people use
6556 64-bit code, but make sure all their addresses are in the
6557 lowermost or uppermost 32-bit section of the 64-bit address
6558 space. Thus, when they use an R_MIPS_64 they mean what is
6559 usually meant by R_MIPS_32, with the exception that the
6560 stored value is sign-extended to 64 bits. */
6563 /* On big-endian systems, we need to lie about the position
6564 of the reloc. */
6567 }
6568 else
6572 {
6575 /* If these relocations were originally of the REL variety,
6576 we must pull the addend out of the field that will be
6577 relocated. Otherwise, we simply use the contents of the
6578 RELA relocation. To determine which flavor or relocation
6579 this is, we depend on the fact that the INPUT_SECTION's
6580 REL_HDR is read before its REL_HDR2. */
6587 {
6588 /* Note that this is a REL relocation. */
6591 /* Get the addend, which is stored in the input file. */
6593 rel,
6594 input_bfd,
6595 contents);
6598 /* For some kinds of relocations, the ADDEND is a
6599 combination of the addend stored in two different
6600 relocations. */
6605 local_sections)))
6606 {
6607 bfd_vma l;
6612 /* The combined value is the sum of the HI16 addend,
6613 left-shifted by sixteen bits, and the LO16
6614 addend, sign extended. (Usually, the code does
6615 a `lui' of the HI16 value, and then an `addiu' of
6616 the LO16 value.)
6618 Scan ahead to find a matching LO16 relocation. */
6621 else
6623 lo16_relocation
6628 /* Obtain the addend kept there. */
6631 lo16_relocation,
6638 /* Compute the combined addend. */
6640 }
6642 {
6643 /* The addend is scrambled in the object file. See
6644 mips_elf_perform_relocation for details on the
6645 format. */
6649 }
6650 }
6651 else
6653 }
6656 {
6664 /* Since we're just relocating, all we need to do is copy
6665 the relocations back out to the object file, unless
6666 they're against a section symbol, in which case we need
6667 to adjust by the section offset, or unless they're GP
6668 relative in which case we need to adjust by the amount
6669 that we're adjusting GP in this relocateable object. */
6672 /* There's nothing to do for non-local relocations. */
6683 /* The addend is stored without its two least
6684 significant bits (which are always zero.) In a
6685 non-relocateable link, calculate_relocation will do
6686 this shift; here, we must do it ourselves. */
6692 /* Adjust the addend appropriately. */
6695 /* If the relocation is for a R_MIPS_HI16 or R_MIPS_GOT16,
6696 then we only want to write out the high-order 16 bits.
6697 The subsequent R_MIPS_LO16 will handle the low-order bits. */
6701 /* If the relocation is for an R_MIPS_26 relocation, then
6702 the two low-order bits are not stored in the object file;
6703 they are implicitly zero. */
6709 /* If this is a RELA relocation, just update the addend.
6710 We have to cast away constness for REL. */
6712 else
6713 {
6714 /* Otherwise, we have to write the value back out. Note
6715 that we use the source mask, rather than the
6716 destination mask because the place to which we are
6717 writing will be source of the addend in the final
6718 link. */
6722 /* See the comment above about using R_MIPS_64 in the 32-bit
6723 ABI. Here, we need to update the addend. It would be
6724 possible to get away with just using the R_MIPS_32 reloc
6725 but for endianness. */
6726 {
6727 bfd_vma sign_bits;
6728 bfd_vma low_bits;
6729 bfd_vma high_bits;
6733 else
6736 /* If we don't know that we have a 64-bit type,
6737 do two separate stores. */
6739 {
6740 /* Store the sign-bits (which are most significant)
6741 first. */
6744 }
6745 else
6746 {
6749 }
6755 }
6761 }
6763 /* Go on to the next relocation. */
6765 }
6767 /* In the N32 and 64-bit ABIs there may be multiple consecutive
6768 relocations for the same offset. In that case we are
6769 supposed to treat the output of each relocation as the addend
6770 for the next. */
6775 else
6778 /* Figure out what value we are supposed to relocate. */
6780 input_bfd,
6781 input_section,
6782 info,
6783 rel,
6784 addend,
6785 howto,
6786 local_syms,
6787 local_sections,
6791 {
6793 /* There's nothing to do. */
6797 /* mips_elf_calculate_relocation already called the
6798 undefined_symbol callback. There's no real point in
6799 trying to perform the relocation at this point, so we
6800 just skip ahead to the next relocation. */
6809 /* Ignore overflow until we reach the last relocation for
6810 a given location. */
6811 ;
6812 else
6813 {
6819 }
6828 }
6830 /* If we've got another relocation for the address, keep going
6831 until we reach the last one. */
6833 {
6836 }
6839 /* See the comment above about using R_MIPS_64 in the 32-bit
6840 ABI. Until now, we've been using the HOWTO for R_MIPS_32;
6841 that calculated the right value. Now, however, we
6842 sign-extend the 32-bit result to 64-bits, and store it as a
6843 64-bit value. We are especially generous here in that we
6844 go to extreme lengths to support this usage on systems with
6845 only a 32-bit VMA. */
6846 {
6847 bfd_vma sign_bits;
6848 bfd_vma low_bits;
6849 bfd_vma high_bits;
6853 else
6856 /* If we don't know that we have a 64-bit type,
6857 do two separate stores. */
6859 {
6860 /* Undo what we did above. */
6862 /* Store the sign-bits (which are most significant)
6863 first. */
6866 }
6867 else
6868 {
6871 }
6877 }
6879 /* Actually perform the relocation. */
6882 require_jalx))
6884 }
6887 }
6889 /* This hook function is called before the linker writes out a global
6890 symbol. We mark symbols as small common if appropriate. This is
6891 also where we undo the increment of the value for a mips16 symbol. */
6893 /*ARGSIGNORED*/
6894 boolean
6901 {
6902 /* If we see a common symbol, which implies a relocatable link, then
6903 if a symbol was small common in an input file, mark it as small
6904 common in the output file. */
6914 }
6915 \f
6916 /* Functions for the dynamic linker. */
6918 /* The name of the dynamic interpreter. This is put in the .interp
6919 section. */
6921 #define ELF_DYNAMIC_INTERPRETER(abfd) \
6926 /* Create dynamic sections when linking against a dynamic object. */
6928 boolean
6932 {
6934 flagword flags;
6941 /* Mips ABI requests the .dynamic section to be read only. */
6944 {
6947 }
6949 /* We need to create .got section. */
6953 /* Create the .msym section on IRIX6. It is used by the dynamic
6954 linker to speed up dynamic relocations, and to avoid computing
6955 the ELF hash for symbols. */
6960 /* Create .stub section. */
6963 {
6970 }
6975 {
6982 }
6984 /* On IRIX5, we adjust add some additional symbols and change the
6985 alignments of several sections. There is no ABI documentation
6986 indicating that this is necessary on IRIX6, nor any evidence that
6987 the linker takes such action. */
6989 {
6991 {
7005 }
7007 /* We need to create a .compact_rel section. */
7011 /* Change aligments of some sections. */
7027 }
7030 {
7046 {
7047 /* __rld_map is a four byte word located in the .data section
7048 and is filled in by the rtld to contain a pointer to
7049 the _r_debug structure. Its symbol value will be set in
7050 mips_elf_finish_dynamic_symbol. */
7067 }
7068 }
7071 }
7073 /* Create the .compact_rel section. */
7075 static boolean
7079 {
7080 flagword flags;
7084 {
7096 }
7099 }
7101 /* Create the .got section to hold the global offset table. */
7103 static boolean
7107 {
7108 flagword flags;
7113 /* This function may be called more than once. */
7126 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
7127 linker script because we don't want to define the symbol if we
7128 are not creating a global offset table. */
7144 /* The first several global offset table entries are reserved. */
7155 {
7160 }
7166 }
7168 /* Returns the .msym section for ABFD, creating it if it does not
7169 already exist. Returns NULL to indicate error. */
7174 {
7179 {
7183 SEC_ALLOC
7184 | SEC_LOAD
7185 | SEC_HAS_CONTENTS
7186 | SEC_LINKER_CREATED
7191 }
7194 }
7196 /* Add room for N relocations to the .rel.dyn section in ABFD. */
7198 static void
7202 {
7209 {
7210 /* Make room for a null element. */
7213 }
7215 }
7217 /* Look through the relocs for a section during the first phase, and
7218 allocate space in the global offset table. */
7220 boolean
7226 {
7247 /* Check for the mips16 stub sections. */
7251 {
7254 /* Look at the relocation information to figure out which symbol
7255 this is for. */
7261 {
7264 /* This stub is for a local symbol. This stub will only be
7265 needed if there is some relocation in this BFD, other
7266 than a 16 bit function call, which refers to this symbol. */
7268 {
7272 /* We can ignore stub sections when looking for relocs. */
7283 sec_relocs = (_bfd_elf32_link_read_relocs
7301 }
7304 {
7305 /* There is no non-call reloc for this stub, so we do
7306 not need it. Since this function is called before
7307 the linker maps input sections to output sections, we
7308 can easily discard it by setting the SEC_EXCLUDE
7309 flag. */
7312 }
7314 /* Record this stub in an array of local symbol stubs for
7315 this BFD. */
7317 {
7323 else
7330 }
7334 /* We don't need to set mips16_stubs_seen in this case.
7335 That flag is used to see whether we need to look through
7336 the global symbol table for stubs. We don't need to set
7337 it here, because we just have a local stub. */
7338 }
7339 else
7340 {
7346 /* H is the symbol this stub is for. */
7350 }
7351 }
7354 {
7359 /* Look at the relocation information to figure out which symbol
7360 this is for. */
7366 {
7367 /* This stub was actually built for a static symbol defined
7368 in the same file. We assume that all static symbols in
7369 mips16 code are themselves mips16, so we can simply
7370 discard this stub. Since this function is called before
7371 the linker maps input sections to output sections, we can
7372 easily discard it by setting the SEC_EXCLUDE flag. */
7375 }
7380 /* H is the symbol this stub is for. */
7384 else
7387 /* If we already have an appropriate stub for this function, we
7388 don't need another one, so we can discard this one. Since
7389 this function is called before the linker maps input sections
7390 to output sections, we can easily discard it by setting the
7391 SEC_EXCLUDE flag. We can also discard this section if we
7392 happen to already know that this is a mips16 function; it is
7393 not necessary to check this here, as it is checked later, but
7394 it is slightly faster to check now. */
7396 {
7399 }
7403 }
7406 {
7409 }
7410 else
7411 {
7415 else
7416 {
7420 }
7421 }
7427 {
7437 else
7438 {
7441 /* This may be an indirect symbol created because of a version. */
7443 {
7446 }
7447 }
7449 /* Some relocs require a global offset table. */
7451 {
7453 {
7481 }
7482 }
7487 {
7488 /* We may need a local GOT entry for this relocation. We
7489 don't count R_MIPS_GOT_PAGE because we can estimate the
7490 maximum number of pages needed by looking at the size of
7491 the segment. Similar comments apply to R_MIPS_GOT16. We
7492 don't count R_MIPS_GOT_HI16, or R_MIPS_CALL_HI16 because
7493 these are always followed by an R_MIPS_GOT_LO16 or
7494 R_MIPS_CALL_LO16.
7496 This estimation is very conservative since we can merge
7497 duplicate entries in the GOT. In order to be less
7498 conservative, we could actually build the GOT here,
7499 rather than in relocate_section. */
7502 }
7505 {
7508 {
7514 }
7515 /* Fall through. */
7520 {
7521 /* This symbol requires a global offset table entry. */
7525 /* We need a stub, not a plt entry for the undefined
7526 function. But we record it as if it needs plt. See
7527 elf_adjust_dynamic_symbol in elflink.h. */
7530 }
7537 /* This symbol requires a global offset table entry. */
7547 {
7549 {
7554 {
7558 (SEC_ALLOC
7559 | SEC_LOAD
7560 | SEC_HAS_CONTENTS
7561 | SEC_IN_MEMORY
7562 | SEC_LINKER_CREATED
7567 }
7568 }
7570 /* When creating a shared object, we must copy these
7571 reloc types into the output file as R_MIPS_REL32
7572 relocs. We make room for this reloc in the
7573 .rel.dyn reloc section. */
7575 else
7576 {
7579 /* We only need to copy this reloc if the symbol is
7580 defined in a dynamic object. */
7583 }
7585 /* Even though we don't directly need a GOT entry for
7586 this symbol, a symbol must have a dynamic symbol
7587 table index greater that DT_MIPS_GOTSYM if there are
7588 dynamic relocations against it. */
7592 }
7608 /* This relocation describes the C++ object vtable hierarchy.
7609 Reconstruct it for later use during GC. */
7615 /* This relocation describes which C++ vtable entries are actually
7616 used. Record for later use during GC. */
7624 }
7626 /* If this reloc is not a 16 bit call, and it has a global
7627 symbol, then we will need the fn_stub if there is one.
7628 References from a stub section do not count. */
7637 {
7642 }
7643 }
7646 }
7648 /* Return the section that should be marked against GC for a given
7649 relocation. */
7651 asection *
7658 {
7659 /* ??? Do mips16 stub sections need to be handled special? */
7662 {
7664 {
7671 {
7681 }
7682 }
7683 }
7684 else
7685 {
7690 {
7692 }
7693 }
7696 }
7698 /* Update the got entry reference counts for the section being removed. */
7700 boolean
7706 {
7707 #if 0
7722 {
7729 /* ??? It would seem that the existing MIPS code does no sort
7730 of reference counting or whatnot on its GOT and PLT entries,
7731 so it is not possible to garbage collect them at this time. */
7736 }
7737 #endif
7740 }
7743 /* Adjust a symbol defined by a dynamic object and referenced by a
7744 regular object. The current definition is in some section of the
7745 dynamic object, but we're not including those sections. We have to
7746 change the definition to something the rest of the link can
7747 understand. */
7749 boolean
7753 {
7760 /* Make sure we know what is going on here. */
7771 /* If this symbol is defined in a dynamic object, we need to copy
7772 any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output
7773 file. */
7781 /* For a function, create a stub, if needed. */
7784 {
7788 /* If this symbol is not defined in a regular file, then set
7789 the symbol to the stub location. This is required to make
7790 function pointers compare as equal between the normal
7791 executable and the shared library. */
7793 {
7794 /* We need .stub section. */
7802 /* XXX Write this stub address somewhere. */
7805 /* Make room for this stub code. */
7808 /* The last half word of the stub will be filled with the index
7809 of this symbol in .dynsym section. */
7811 }
7812 }
7814 /* If this is a weak symbol, and there is a real definition, the
7815 processor independent code will have arranged for us to see the
7816 real definition first, and we can just use the same value. */
7818 {
7824 }
7826 /* This is a reference to a symbol defined by a dynamic object which
7827 is not a function. */
7830 }
7832 /* This function is called after all the input files have been read,
7833 and the input sections have been assigned to output sections. We
7834 check for any mips16 stub sections that we can discard. */
7836 static boolean mips_elf_check_mips16_stubs
7839 boolean
7843 {
7846 /* The .reginfo section has a fixed size. */
7856 mips_elf_check_mips16_stubs,
7860 }
7862 /* Check the mips16 stubs for a particular symbol, and see if we can
7863 discard them. */
7865 /*ARGSUSED*/
7866 static boolean
7869 PTR data ATTRIBUTE_UNUSED;
7870 {
7873 {
7874 /* We don't need the fn_stub; the only references to this symbol
7875 are 16 bit calls. Clobber the size to 0 to prevent it from
7876 being included in the link. */
7882 }
7886 {
7887 /* We don't need the call_stub; this is a 16 bit function, so
7888 calls from other 16 bit functions are OK. Clobber the size
7889 to 0 to prevent it from being included in the link. */
7895 }
7899 {
7900 /* We don't need the call_stub; this is a 16 bit function, so
7901 calls from other 16 bit functions are OK. Clobber the size
7902 to 0 to prevent it from being included in the link. */
7908 }
7911 }
7913 /* Set the sizes of the dynamic sections. */
7915 boolean
7919 {
7922 boolean reltext;
7929 {
7930 /* Set the contents of the .interp section to the interpreter. */
7932 {
7935 s->_raw_size
7937 s->contents
7939 }
7940 }
7942 /* The check_relocs and adjust_dynamic_symbol entry points have
7943 determined the sizes of the various dynamic sections. Allocate
7944 memory for them. */
7947 {
7949 boolean strip;
7951 /* It's OK to base decisions on the section name, because none
7952 of the dynobj section names depend upon the input files. */
7961 {
7963 {
7964 /* We only strip the section if the output section name
7965 has the same name. Otherwise, there might be several
7966 input sections for this output section. FIXME: This
7967 code is probably not needed these days anyhow, since
7968 the linker now does not create empty output sections. */
7974 }
7975 else
7976 {
7980 /* If this relocation section applies to a read only
7981 section, then we probably need a DT_TEXTREL entry.
7982 If the relocation section is .rel.dyn, we always
7983 assert a DT_TEXTREL entry rather than testing whether
7984 there exists a relocation to a read only section or
7985 not. */
7996 /* We use the reloc_count field as a counter if we need
7997 to copy relocs into the output file. */
8001 }
8002 }
8004 {
8007 bfd_size_type local_gotno;
8014 /* Calculate the total loadable size of the output. That
8015 will give us the maximum number of GOT_PAGE entries
8016 required. */
8018 {
8022 subsection;
8024 {
8028 }
8029 }
8032 /* Assume there are two loadable segments consisting of
8033 contiguous sections. Is 5 enough? */
8036 /* It's possible we will need GOT_PAGE entries as well as
8037 GOT16 entries. Often, these will be able to share GOT
8038 entries, but not always. */
8044 /* There has to be a global GOT entry for every symbol with
8045 a dynamic symbol table index of DT_MIPS_GOTSYM or
8046 higher. Therefore, it make sense to put those symbols
8047 that need GOT entries at the end of the symbol table. We
8048 do that here. */
8054 else
8055 /* If there are no global symbols, or none requiring
8056 relocations, then GLOBAL_GOTSYM will be NULL. */
8060 }
8062 {
8063 /* Irix rld assumes that the function stub isn't at the end
8064 of .text section. So put a dummy. XXX */
8066 }
8070 {
8071 /* We add a room for __rld_map. It will be filled in by the
8072 rtld to contain a pointer to the _r_debug structure. */
8074 }
8084 {
8085 /* It's not one of our sections, so don't allocate space. */
8087 }
8090 {
8093 }
8095 /* Allocate memory for the section contents. */
8098 {
8101 }
8102 }
8105 {
8106 /* Add some entries to the .dynamic section. We fill in the
8107 values later, in elf_mips_finish_dynamic_sections, but we
8108 must add the entries now so that we get the correct size for
8109 the .dynamic section. The DT_DEBUG entry is filled in by the
8110 dynamic linker and used by the debugger. */
8112 {
8114 {
8115 /* SGI object has the equivalence of DT_DEBUG in the
8116 DT_MIPS_RLD_MAP entry. */
8119 }
8120 else
8123 }
8126 {
8129 }
8136 {
8145 }
8154 {
8163 }
8171 #if 0
8172 /* Time stamps in executable files are a bad idea. */
8175 #endif
8180 #endif
8185 #endif
8207 && (bfd_get_section_by_name
8216 }
8219 }
8221 /* If NAME is one of the special IRIX6 symbols defined by the linker,
8222 adjust it appropriately now. */
8224 static void
8229 {
8230 /* The linker script takes care of providing names and values for
8231 these, but we must place them into the right sections. */
8238 NULL
8239 };
8246 NULL
8247 };
8257 {
8258 /* All of these symbols are given type STT_SECTION by the
8259 IRIX6 linker. */
8262 /* The IRIX linker puts these symbols in special sections. */
8265 else
8269 }
8270 }
8272 /* Finish up dynamic symbol handling. We set the contents of various
8273 dynamic sections here. */
8275 boolean
8281 {
8283 bfd_vma gval;
8295 {
8300 /* This symbol has a stub. Set it up. */
8308 /* Fill the stub. */
8315 /* FIXME: Can h->dynindex be more than 64K? */
8326 /* Mark the symbol as undefined. plt.offset != -1 occurs
8327 only for the referenced symbol. */
8330 /* The run-time linker uses the st_value field of the symbol
8331 to reset the global offset table entry for this external
8332 to its stub address when unlinking a shared object. */
8335 }
8345 /* Run through the global symbol table, creating GOT entries for all
8346 the symbols that need them. */
8349 {
8350 bfd_vma offset;
8351 bfd_vma value;
8355 else
8356 /* For an entity defined in a shared object, this will be
8357 NULL. (For functions in shared objects for
8358 which we have created stubs, ST_VALUE will be non-NULL.
8359 That's because such the functions are now no longer defined
8360 in a shared object.) */
8365 }
8367 /* Create a .msym entry, if appropriate. */
8371 {
8372 Elf32_Internal_Msym msym;
8375 /* It is undocumented what the `1' indicates, but IRIX6 uses
8376 this value. */
8378 bfd_mips_elf_swap_msym_out
8381 }
8383 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
8389 {
8393 }
8395 {
8397 {
8401 }
8404 {
8409 }
8411 {
8416 }
8418 {
8423 }
8424 }
8426 /* Handle the IRIX6-specific symbols. */
8432 {
8435 {
8442 }
8445 {
8446 /* IRIX6 does not use a .rld_map section. */
8451 }
8452 }
8454 /* If this is a mips16 symbol, force the value to be even. */
8460 }
8462 /* Finish up the dynamic sections. */
8464 boolean
8468 {
8481 else
8482 {
8486 }
8489 {
8498 {
8499 Elf_Internal_Dyn dyn;
8503 boolean swap_out_p;
8505 /* Read in the current dynamic entry. */
8508 /* Assume that we're going to modify it and write it out. */
8512 {
8514 s = (bfd_get_section_by_name
8522 /* Rewrite DT_STRSZ. */
8535 get_vma:
8557 set_elemno:
8560 {
8563 else
8565 }
8566 else
8575 /* XXX FIXME: */
8580 /* XXX FIXME: */
8595 /* The index into the dynamic symbol table which is the
8596 entry of the first external symbol that is not
8597 referenced within the same object. */
8603 {
8606 }
8607 /* In case if we don't have global got symbols we default
8608 to setting DT_MIPS_GOTSYM to the same value as
8609 DT_MIPS_SYMTABNO, so we just fall through. */
8619 else
8632 s = (bfd_get_section_by_name
8638 s = (bfd_get_section_by_name
8646 }
8651 }
8652 }
8654 /* The first entry of the global offset table will be filled at
8655 runtime. The second entry will be used by some runtime loaders.
8656 This isn't the case of Irix rld. */
8658 {
8662 }
8668 {
8671 Elf32_compact_rel cpt;
8673 /* ??? The section symbols for the output sections were set up in
8674 _bfd_elf_final_link. SGI sets the STT_NOTYPE attribute for these
8675 symbols. Should we do so? */
8680 {
8681 Elf32_Internal_Msym msym;
8687 {
8690 bfd_mips_elf_swap_msym_out
8694 }
8695 }
8698 {
8699 /* Write .compact_rel section out. */
8702 {
8714 /* Clean up a dummy stub function entry in .text. */
8718 {
8719 file_ptr dummy_offset;
8724 MIPS_FUNCTION_STUB_SIZE);
8725 }
8726 }
8727 }
8729 /* Clean up a first relocation in .rel.dyn. */
8734 }
8737 }
8738 \f
8739 /* This is almost identical to bfd_generic_get_... except that some
8740 MIPS relocations need to be handled specially. Sigh. */
8749 boolean relocateable;
8751 {
8752 /* Get enough memory to hold the stuff */
8767 /* read in the section */
8769 input_section,
8775 /* We're not relaxing the section, so just copy the size info */
8780 input_section,
8781 reloc_vector,
8782 symbols);
8787 {
8789 /* for mips */
8793 {
8796 /* Skip all this stuff if we aren't mixing formats. */
8800 else
8801 {
8804 }
8805 lookup:
8807 {
8809 {
8823 /* @@FIXME ignoring warning for now */
8828 }
8829 }
8830 else
8832 }
8833 /* end mips */
8835 parent++)
8836 {
8838 bfd_reloc_status_type r;
8840 /* Specific to MIPS: Deal with relocation types that require
8841 knowing the gp of the output bfd. */
8844 {
8845 /* The special_function wouldn't get called anyways. */
8846 }
8848 {
8849 /* The gp isn't there; let the special function code
8850 fall over on its own. */
8851 }
8854 {
8855 /* bypass special_function call */
8859 }
8860 /* end mips specific stuff */
8865 input_section,
8868 skip_bfd_perform_relocation:
8871 {
8874 /* A partial link, so keep the relocs */
8877 }
8880 {
8882 {
8908 }
8910 }
8911 }
8912 }
8917 error_return:
8921 }
8922 #define bfd_elf32_bfd_get_relocated_section_contents \
8923 elf32_mips_get_relocated_section_contents
8924 \f
8925 /* ECOFF swapping routines. These are used when dealing with the
8926 .mdebug section, which is in the ECOFF debugging format. */
8928 {
8929 /* Symbol table magic number. */
8930 magicSym,
8931 /* Alignment of debugging information. E.g., 4. */
8933 /* Sizes of external symbolic information. */
8942 /* Functions to swap in external symbolic data. */
8943 ecoff_swap_hdr_in,
8944 ecoff_swap_dnr_in,
8945 ecoff_swap_pdr_in,
8946 ecoff_swap_sym_in,
8947 ecoff_swap_opt_in,
8948 ecoff_swap_fdr_in,
8949 ecoff_swap_rfd_in,
8950 ecoff_swap_ext_in,
8951 _bfd_ecoff_swap_tir_in,
8952 _bfd_ecoff_swap_rndx_in,
8953 /* Functions to swap out external symbolic data. */
8954 ecoff_swap_hdr_out,
8955 ecoff_swap_dnr_out,
8956 ecoff_swap_pdr_out,
8957 ecoff_swap_sym_out,
8958 ecoff_swap_opt_out,
8959 ecoff_swap_fdr_out,
8960 ecoff_swap_rfd_out,
8961 ecoff_swap_ext_out,
8962 _bfd_ecoff_swap_tir_out,
8963 _bfd_ecoff_swap_rndx_out,
8964 /* Function to read in symbolic data. */
8965 _bfd_mips_elf_read_ecoff_info
8966 };
8967 \f
8968 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
8970 #define TARGET_BIG_SYM bfd_elf32_bigmips_vec
8972 #define ELF_ARCH bfd_arch_mips
8973 #define ELF_MACHINE_CODE EM_MIPS
8975 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
8976 a value of 0x1000, and we are compatible. */
8977 #define ELF_MAXPAGESIZE 0x1000
8979 #define elf_backend_collect true
8980 #define elf_backend_type_change_ok true
8981 #define elf_backend_can_gc_sections true
8982 #define elf_backend_sign_extend_vma true
8983 #define elf_info_to_howto mips_info_to_howto_rela
8984 #define elf_info_to_howto_rel mips_info_to_howto_rel
8985 #define elf_backend_sym_is_global mips_elf_sym_is_global
8986 #define elf_backend_object_p _bfd_mips_elf_object_p
8987 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
8988 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
8989 #define elf_backend_section_from_bfd_section \
8990 _bfd_mips_elf_section_from_bfd_section
8991 #define elf_backend_section_processing _bfd_mips_elf_section_processing
8992 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
8993 #define elf_backend_additional_program_headers \
8994 _bfd_mips_elf_additional_program_headers
8995 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
8996 #define elf_backend_final_write_processing \
8997 _bfd_mips_elf_final_write_processing
8998 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
8999 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
9000 #define elf_backend_create_dynamic_sections \
9001 _bfd_mips_elf_create_dynamic_sections
9002 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
9003 #define elf_backend_adjust_dynamic_symbol \
9004 _bfd_mips_elf_adjust_dynamic_symbol
9005 #define elf_backend_always_size_sections \
9006 _bfd_mips_elf_always_size_sections
9007 #define elf_backend_size_dynamic_sections \
9008 _bfd_mips_elf_size_dynamic_sections
9009 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
9010 #define elf_backend_link_output_symbol_hook \
9011 _bfd_mips_elf_link_output_symbol_hook
9012 #define elf_backend_finish_dynamic_symbol \
9013 _bfd_mips_elf_finish_dynamic_symbol
9014 #define elf_backend_finish_dynamic_sections \
9015 _bfd_mips_elf_finish_dynamic_sections
9016 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
9017 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
9019 #define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO)
9020 #define elf_backend_plt_header_size 0
9022 #define bfd_elf32_bfd_is_local_label_name \
9023 mips_elf_is_local_label_name
9024 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
9025 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
9026 #define bfd_elf32_bfd_link_hash_table_create \
9027 _bfd_mips_elf_link_hash_table_create
9028 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
9029 #define bfd_elf32_bfd_copy_private_bfd_data \
9030 _bfd_mips_elf_copy_private_bfd_data
9031 #define bfd_elf32_bfd_merge_private_bfd_data \
9032 _bfd_mips_elf_merge_private_bfd_data
9033 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
9034 #define bfd_elf32_bfd_print_private_bfd_data \
9035 _bfd_mips_elf_print_private_bfd_data