1 /* BFD support for handling relocation entries.
2 Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25 BFD maintains relocations in much the same was as it maintains
26 symbols; they are left alone until required, then read in
27 en-mass and traslated into an internal form. There is a common
28 routine <<bfd_perform_relocation>> which acts upon the
29 canonical form to to the actual fixup.
31 Note that relocations are maintained on a per section basis,
32 whilst symbols are maintained on a per BFD basis.
34 All a back end has to do to fit the BFD interface is to create
35 as many <<struct reloc_cache_entry>> as there are relocations
36 in a particular section, and fill in the right bits:
51 typedef arelent, howto manager, Relocations, Relocations
56 This is the structure of a relocation entry:
60 .typedef enum bfd_reloc_status
62 . {* No errors detected *}
65 . {* The relocation was performed, but there was an overflow. *}
68 . {* The address to relocate was not within the section supplied. *}
69 . bfd_reloc_outofrange,
71 . {* Used by special functions *}
75 . bfd_reloc_notsupported,
77 . {* Unsupported relocation size requested. *}
80 . {* The symbol to relocate against was undefined. *}
81 . bfd_reloc_undefined,
83 . {* The relocation was performed, but may not be ok - presently
84 . generated only when linking i960 coff files with i960 b.out
88 . bfd_reloc_status_type;
91 .typedef struct reloc_cache_entry
93 . {* A pointer into the canonical table of pointers *}
94 . struct symbol_cache_entry **sym_ptr_ptr;
96 . {* offset in section *}
97 . bfd_size_type address;
99 . {* addend for relocation value *}
102 . {* Pointer to how to perform the required relocation *}
103 . CONST struct reloc_howto_struct *howto;
112 Here is a description of each of the fields within a relent:
116 The symbol table pointer points to a pointer to the symbol
117 associated with the relocation request. This would naturally
118 be the pointer into the table returned by the back end's
119 get_symtab action. @xref{Symbols}. The symbol is referenced
120 through a pointer to a pointer so that tools like the linker
121 can fix up all the symbols of the same name by modifying only
122 one pointer. The relocation routine looks in the symbol and
123 uses the base of the section the symbol is attached to and the
124 value of the symbol as the initial relocation offset. If the
125 symbol pointer is zero, then the section provided is looked up.
129 The address field gives the offset in bytes from the base of
130 the section data which owns the relocation record to the first
131 byte of relocatable information. The actual data relocated
132 will be relative to this point - for example, a relocation
133 type which modifies the bottom two bytes of a four byte word
134 would not touch the first byte pointed to in a big endian
139 The addend is a value provided by the back end to be added (!)
140 to the relocation offset. Its interpretation is dependent upon
141 the howto. For example, on the 68k the code:
147 | return foo[0x12345678];
150 Could be compiled into:
153 | moveb @@#12345678,d0
159 This could create a reloc pointing to foo, but leave the
160 offset in the data (something like)
163 |RELOCATION RECORDS FOR [.text]:
167 |00000000 4e56 fffc ; linkw fp,#-4
168 |00000004 1039 1234 5678 ; moveb @@#12345678,d0
169 |0000000a 49c0 ; extbl d0
170 |0000000c 4e5e ; unlk fp
174 Using coff and an 88k, some instructions don't have enough
175 space in them to represent the full address range, and
176 pointers have to be loaded in two parts. So you'd get something like:
179 | or.u r13,r0,hi16(_foo+0x12345678)
180 | ld.b r2,r13,lo16(_foo+0x12345678)
184 This should create two relocs, both pointing to _foo, and with
185 0x12340000 in their addend field. The data would consist of:
188 |RELOCATION RECORDS FOR [.text]:
190 |00000002 HVRT16 _foo+0x12340000
191 |00000006 LVRT16 _foo+0x12340000
193 |00000000 5da05678 ; or.u r13,r0,0x5678
194 |00000004 1c4d5678 ; ld.b r2,r13,0x5678
195 |00000008 f400c001 ; jmp r1
198 The relocation routine digs out the value from the data, adds
199 it to the addend to get the original offset and then adds the
200 value of _foo. Note that all 32 bits have to be kept around
201 somewhere, to cope with carry from bit 15 to bit 16.
203 One further example is the sparc and the a.out format. The
204 sparc has a similar problem to the 88k, in that some
205 instructions don't have room for an entire offset, but on the
206 sparc the parts are created odd sized lumps. The designers of
207 the a.out format chose not to use the data within the section
208 for storing part of the offset; all the offset is kept within
209 the reloc. Any thing in the data should be ignored.
212 | sethi %hi(_foo+0x12345678),%g2
213 | ldsb [%g2+%lo(_foo+0x12345678)],%i0
217 Both relocs contains a pointer to foo, and the offsets would
221 |RELOCATION RECORDS FOR [.text]:
223 |00000004 HI22 _foo+0x12345678
224 |00000008 LO10 _foo+0x12345678
226 |00000000 9de3bf90 ; save %sp,-112,%sp
227 |00000004 05000000 ; sethi %hi(_foo+0),%g2
228 |00000008 f048a000 ; ldsb [%g2+%lo(_foo+0)],%i0
229 |0000000c 81c7e008 ; ret
230 |00000010 81e80000 ; restore
235 The howto field can be imagined as a
236 relocation instruction. It is a pointer to a struct which
237 contains information on what to do with all the other
238 information in the reloc record and data section. A back end
239 would normally have a relocation instruction set and turn
240 relocations into pointers to the correct structure on input -
241 but it would be possible to create each howto field on demand.
250 The <<reloc_howto_type>> is a structure which contains all the
251 information that BFD needs to know to tie up a back end's data.
254 .struct symbol_cache_entry; {* Forward declaration *}
256 .typedef CONST struct reloc_howto_struct
258 . {* The type field has mainly a documetary use - the back end can
259 . to what it wants with it, though the normally the back end's
260 . external idea of what a reloc number would be would be stored
261 . in this field. For example, the a PC relative word relocation
262 . in a coff environment would have the type 023 - because that's
263 . what the outside world calls a R_PCRWORD reloc. *}
266 . {* The value the final relocation is shifted right by. This drops
267 . unwanted data from the relocation. *}
268 . unsigned int rightshift;
270 . {* The size of the item to be relocated - 0, is one byte, 1 is 2
271 . bytes, 2 is four bytes. A negative value indicates that the
272 . result is to be subtracted from the data. *}
275 . {* Now obsolete? But m68k-coff still uses it... *}
276 . unsigned int bitsize;
278 . {* Notes that the relocation is relative to the location in the
279 . data section of the addend. The relocation function will
280 . subtract from the relocation value the address of the location
281 . being relocated. *}
282 . boolean pc_relative;
284 . unsigned int bitpos;
289 . {* Causes the relocation routine to return an error if overflow
290 . is detected when relocating. *}
291 . boolean complain_on_overflow;
293 . {* If this field is non null, then the supplied function is
294 . called rather than the normal function. This allows really
295 . strange relocation methods to be accomodated (e.g., i960 callj
297 . bfd_reloc_status_type (*special_function)
298 . PARAMS ((bfd *abfd,
299 . arelent *reloc_entry,
300 . struct symbol_cache_entry *symbol,
302 . asection *input_section,
305 . {* The textual name of the relocation type. *}
308 . {* When performing a partial link, some formats must modify the
309 . relocations rather than the data - this flag signals this.*}
310 . boolean partial_inplace;
312 . {* The src_mask is used to select what parts of the read in data
313 . are to be used in the relocation sum. E.g., if this was an 8 bit
314 . bit of data which we read and relocated, this would be
315 . 0x000000ff. When we have relocs which have an addend, such as
316 . sun4 extended relocs, the value in the offset part of a
317 . relocating field is garbage so we never use it. In this case
318 . the mask would be 0x00000000. *}
321 . {* The dst_mask is what parts of the instruction are replaced
322 . into the instruction. In most cases src_mask == dst_mask,
323 . except in the above special case, where dst_mask would be
324 . 0x000000ff, and src_mask would be 0x00000000. *}
327 . {* When some formats create PC relative instructions, they leave
328 . the value of the pc of the place being relocated in the offset
329 . slot of the instruction, so that a PC relative relocation can
330 . be made just by adding in an ordinary offset (e.g., sun3 a.out).
331 . Some formats leave the displacement part of an instruction
332 . empty (e.g., m88k bcs), this flag signals the fact.*}
333 . boolean pcrel_offset;
344 The HOWTO define is horrible and will go away.
347 .#define HOWTO(C, R,S,B, P, BI, ABS, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
348 . {(unsigned)C,R,S,B, P, BI, ABS,O,SF,NAME,INPLACE,MASKSRC,MASKDST,PC}
351 And will be replaced with the totally magic way. But for the
352 moment, we are compatible, so do it this way..
355 .#define NEWHOWTO( FUNCTION, NAME,SIZE,REL,IN) HOWTO(0,0,SIZE,0,REL,0,false,false,FUNCTION, NAME,false,0,0,IN)
358 Helper routine to turn a symbol into a relocation value.
360 .#define HOWTO_PREPARE(relocation, symbol) \
362 . if (symbol != (asymbol *)NULL) { \
363 . if (bfd_is_com_section (symbol->section)) { \
367 . relocation = symbol->value; \
380 How relocs are tied together
382 .typedef unsigned char bfd_byte;
384 .typedef struct relent_chain {
386 . struct relent_chain *next;
395 bfd_perform_relocation
398 bfd_reloc_status_type
399 bfd_perform_relocation
401 arelent *reloc_entry,
403 asection *input_section,
407 If an output_bfd is supplied to this function the generated
408 image will be relocatable, the relocations are copied to the
409 output file after they have been changed to reflect the new
410 state of the world. There are two ways of reflecting the
411 results of partial linkage in an output file; by modifying the
412 output data in place, and by modifying the relocation record.
413 Some native formats (e.g., basic a.out and basic coff) have no
414 way of specifying an addend in the relocation type, so the
415 addend has to go in the output data. This is no big deal
416 since in these formats the output data slot will always be big
417 enough for the addend. Complex reloc types with addends were
418 invented to solve just this problem.
423 bfd_reloc_status_type
424 DEFUN(bfd_perform_relocation,(abfd,
430 arelent *reloc_entry AND
432 asection *input_section AND
436 bfd_reloc_status_type flag = bfd_reloc_ok;
437 bfd_size_type addr = reloc_entry->address ;
438 bfd_vma output_base = 0;
439 reloc_howto_type *howto = reloc_entry->howto;
440 asection *reloc_target_output_section ;
444 symbol = *( reloc_entry->sym_ptr_ptr);
445 if ((symbol->section == &bfd_abs_section)
446 && output_bfd != (bfd *)NULL)
448 reloc_entry->address += input_section->output_offset;
454 if ((symbol->section == &bfd_und_section) && output_bfd == (bfd *)NULL) {
455 flag = bfd_reloc_undefined;
458 if (howto->special_function) {
459 bfd_reloc_status_type cont;
460 cont = howto->special_function(abfd,
466 if (cont != bfd_reloc_continue) return cont;
470 Work out which section the relocation is targetted at and the
471 initial relocation command value.
475 if (bfd_is_com_section (symbol->section)) {
479 relocation = symbol->value;
483 reloc_target_output_section = symbol->section->output_section;
485 if (output_bfd && howto->partial_inplace==false) {
489 output_base = reloc_target_output_section->vma;
493 relocation += output_base + symbol->section->output_offset;
495 relocation += reloc_entry->addend;
497 if(reloc_entry->address > input_section->_cooked_size)
499 return bfd_reloc_outofrange;
503 if (howto->pc_relative == true)
506 Anything which started out as pc relative should end up that
509 There are two ways we can see a pcrel instruction. Sometimes
510 the pcrel displacement has been partially calculated, it
511 includes the distance from the start of the section to the
512 instruction in it (e.g., sun3), and sometimes the field is
513 totally blank - e.g., m88kbcs.
518 input_section->output_section->vma + input_section->output_offset;
520 if (howto->pcrel_offset == true) {
521 relocation -= reloc_entry->address;
525 if (output_bfd!= (bfd *)NULL)
527 if ( howto->partial_inplace == false)
530 This is a partial relocation, and we want to apply the relocation
531 to the reloc entry rather than the raw data. Modify the reloc
532 inplace to reflect what we now know.
534 reloc_entry->addend = relocation ;
535 reloc_entry->address += input_section->output_offset;
540 /* This is a partial relocation, but inplace, so modify the
543 If we've relocated with a symbol with a section, change
544 into a ref to the section belonging to the symbol
547 reloc_entry->address += input_section->output_offset;
549 if (abfd->xvec->flavour == bfd_target_coff_flavour)
551 relocation -= reloc_entry->addend;
552 reloc_entry->addend = 0;
556 reloc_entry->addend = relocation ;
562 reloc_entry->addend = 0;
566 if (howto->complain_on_overflow && howto->pc_relative)
568 /* We can detect overflow safely here */
570 bfd_signed_vma reloc_max = (~(1 << (howto->bitsize - 1)));
571 bfd_signed_vma reloc_min = (-reloc_max - 1);
573 if ((bfd_signed_vma) relocation > reloc_max
574 || (bfd_signed_vma) relocation < reloc_min)
576 flag = bfd_reloc_overflow;
581 Either we are relocating all the way, or we don't want to apply
582 the relocation to the reloc entry (probably because there isn't
583 any room in the output format to describe addends to relocs)
585 relocation >>= howto->rightshift;
587 /* Shift everything up to where it's going to be used */
589 relocation <<= howto->bitpos;
591 /* Wait for the day when all have the mask in them */
594 i instruction to be left alone
595 o offset within instruction
596 r relocation offset to apply
605 i i i i i o o o o o from bfd_get<size>
606 and S S S S S to get the size offset we want
607 + r r r r r r r r r r to get the final value to place
608 and D D D D D to chop to right size
609 -----------------------
612 ... i i i i i o o o o o from bfd_get<size>
613 and N N N N N get instruction
614 -----------------------
620 -----------------------
621 R R R R R R R R R R put into bfd_put<size>
625 x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask))
631 char x = bfd_get_8(abfd, (char *)data + addr);
633 bfd_put_8(abfd,x, (unsigned char *) data + addr);
640 short x = bfd_get_16(abfd, (bfd_byte *)data + addr);
642 bfd_put_16(abfd, x, (unsigned char *)data + addr);
648 long x = bfd_get_32 (abfd, (bfd_byte *) data + addr);
650 bfd_put_32 (abfd, x, (bfd_byte *)data + addr);
655 long x = bfd_get_32(abfd, (bfd_byte *) data + addr);
656 relocation = -relocation;
658 bfd_put_32(abfd,x, (bfd_byte *)data + addr);
667 return bfd_reloc_other;
678 howto manager, , typedef arelent, Relocations
683 When an application wants to create a relocation, but doesn't
684 know what the target machine might call it, it can find out by
685 using this bit of code.
694 The insides of a reloc code
698 .typedef enum bfd_reloc_code_real
701 . {* 16 bits wide, simple reloc *}
704 . {* 8 bits wide, but used to form an address like 0xffnn *}
707 . {* 8 bits wide, simple *}
710 . {* 8 bits wide, pc relative *}
713 . {* The type of reloc used to build a contructor table - at the
714 . moment probably a 32 bit wide abs address, but the cpu can
719 . {* 32 bits wide, simple reloc *}
721 . {* 32 bits, PC-relative *}
722 . BFD_RELOC_32_PCREL,
724 . {* High 22 bits of 32-bit value; simple reloc. *}
729 . {* Reloc types used for i960/b.out. *}
730 . BFD_RELOC_24_PCREL,
731 . BFD_RELOC_I960_CALLJ,
733 . BFD_RELOC_16_PCREL,
734 . {* 32-bit pc-relative, shifted right 2 bits (i.e., 30-bit
735 . word displacement, e.g. for SPARC) *}
736 . BFD_RELOC_32_PCREL_S2,
738 . {* now for the sparc/elf codes *}
739 . BFD_RELOC_NONE, {* actually used *}
740 . BFD_RELOC_SPARC_WDISP22,
743 . BFD_RELOC_SPARC_BASE13,
744 . BFD_RELOC_SPARC_GOT10,
745 . BFD_RELOC_SPARC_GOT13,
746 . BFD_RELOC_SPARC_GOT22,
747 . BFD_RELOC_SPARC_PC10,
748 . BFD_RELOC_SPARC_PC22,
749 . BFD_RELOC_SPARC_WPLT30,
750 . BFD_RELOC_SPARC_COPY,
751 . BFD_RELOC_SPARC_GLOB_DAT,
752 . BFD_RELOC_SPARC_JMP_SLOT,
753 . BFD_RELOC_SPARC_RELATIVE,
754 . BFD_RELOC_SPARC_UA32,
756 . {* this one is a.out specific? *}
757 . BFD_RELOC_SPARC_BASE22,
759 . {* Bits 27..2 of the relocation address shifted right 2 bits;
760 . simple reloc otherwise. *}
761 . BFD_RELOC_MIPS_JMP,
763 . {* signed 16-bit pc-relative, shifted right 2 bits (e.g. for MIPS) *}
764 . BFD_RELOC_16_PCREL_S2,
766 . {* High 16 bits of 32-bit value; simple reloc. *}
768 . {* High 16 bits of 32-bit value but the low 16 bits will be sign
769 . extended and added to form the final result. If the low 16
770 . bits form a negative number, we need to add one to the high value
771 . to compensate for the borrow when the low bits are added. *}
776 . {* 16 bit relocation relative to the global pointer. *}
777 . BFD_RELOC_MIPS_GPREL,
779 . {* These are, so far, specific to HPPA processors. I'm not sure that
780 . some don't duplicate other reloc types, such as BFD_RELOC_32 and
781 . _32_PCREL. Also, many more were in the list I got that don't
782 . fit in well in the model BFD uses, so I've omitted them for now.
783 . If we do make this reloc type get used for code that really does
784 . implement the funky reloc types, they'll have to be added to this
790 . BFD_RELOC_HPPA_L21,
791 . BFD_RELOC_HPPA_R11,
792 . BFD_RELOC_HPPA_R14,
793 . BFD_RELOC_HPPA_R17,
794 . BFD_RELOC_HPPA_LS21,
795 . BFD_RELOC_HPPA_RS11,
796 . BFD_RELOC_HPPA_RS14,
797 . BFD_RELOC_HPPA_RS17,
798 . BFD_RELOC_HPPA_LD21,
799 . BFD_RELOC_HPPA_RD11,
800 . BFD_RELOC_HPPA_RD14,
801 . BFD_RELOC_HPPA_RD17,
802 . BFD_RELOC_HPPA_LR21,
803 . BFD_RELOC_HPPA_RR14,
804 . BFD_RELOC_HPPA_RR17,
805 . BFD_RELOC_HPPA_GOTOFF_11,
806 . BFD_RELOC_HPPA_GOTOFF_14,
807 . BFD_RELOC_HPPA_GOTOFF_L21,
808 . BFD_RELOC_HPPA_GOTOFF_R11,
809 . BFD_RELOC_HPPA_GOTOFF_R14,
810 . BFD_RELOC_HPPA_GOTOFF_LS21,
811 . BFD_RELOC_HPPA_GOTOFF_RS11,
812 . BFD_RELOC_HPPA_GOTOFF_RS14,
813 . BFD_RELOC_HPPA_GOTOFF_LD21,
814 . BFD_RELOC_HPPA_GOTOFF_RD11,
815 . BFD_RELOC_HPPA_GOTOFF_RD14,
816 . BFD_RELOC_HPPA_GOTOFF_LR21,
817 . BFD_RELOC_HPPA_GOTOFF_RR14,
818 . BFD_RELOC_HPPA_DLT_32,
819 . BFD_RELOC_HPPA_DLT_11,
820 . BFD_RELOC_HPPA_DLT_14,
821 . BFD_RELOC_HPPA_DLT_L21,
822 . BFD_RELOC_HPPA_DLT_R11,
823 . BFD_RELOC_HPPA_DLT_R14,
824 . BFD_RELOC_HPPA_ABS_CALL_11,
825 . BFD_RELOC_HPPA_ABS_CALL_14,
826 . BFD_RELOC_HPPA_ABS_CALL_17,
827 . BFD_RELOC_HPPA_ABS_CALL_L21,
828 . BFD_RELOC_HPPA_ABS_CALL_R11,
829 . BFD_RELOC_HPPA_ABS_CALL_R14,
830 . BFD_RELOC_HPPA_ABS_CALL_R17,
831 . BFD_RELOC_HPPA_ABS_CALL_LS21,
832 . BFD_RELOC_HPPA_ABS_CALL_RS11,
833 . BFD_RELOC_HPPA_ABS_CALL_RS14,
834 . BFD_RELOC_HPPA_ABS_CALL_RS17,
835 . BFD_RELOC_HPPA_ABS_CALL_LD21,
836 . BFD_RELOC_HPPA_ABS_CALL_RD11,
837 . BFD_RELOC_HPPA_ABS_CALL_RD14,
838 . BFD_RELOC_HPPA_ABS_CALL_RD17,
839 . BFD_RELOC_HPPA_ABS_CALL_LR21,
840 . BFD_RELOC_HPPA_ABS_CALL_RR14,
841 . BFD_RELOC_HPPA_ABS_CALL_RR17,
842 . BFD_RELOC_HPPA_PCREL_CALL_11,
843 . BFD_RELOC_HPPA_PCREL_CALL_12,
844 . BFD_RELOC_HPPA_PCREL_CALL_14,
845 . BFD_RELOC_HPPA_PCREL_CALL_17,
846 . BFD_RELOC_HPPA_PCREL_CALL_L21,
847 . BFD_RELOC_HPPA_PCREL_CALL_R11,
848 . BFD_RELOC_HPPA_PCREL_CALL_R14,
849 . BFD_RELOC_HPPA_PCREL_CALL_R17,
850 . BFD_RELOC_HPPA_PCREL_CALL_LS21,
851 . BFD_RELOC_HPPA_PCREL_CALL_RS11,
852 . BFD_RELOC_HPPA_PCREL_CALL_RS14,
853 . BFD_RELOC_HPPA_PCREL_CALL_RS17,
854 . BFD_RELOC_HPPA_PCREL_CALL_LD21,
855 . BFD_RELOC_HPPA_PCREL_CALL_RD11,
856 . BFD_RELOC_HPPA_PCREL_CALL_RD14,
857 . BFD_RELOC_HPPA_PCREL_CALL_RD17,
858 . BFD_RELOC_HPPA_PCREL_CALL_LR21,
859 . BFD_RELOC_HPPA_PCREL_CALL_RR14,
860 . BFD_RELOC_HPPA_PCREL_CALL_RR17,
861 . BFD_RELOC_HPPA_PLABEL_32,
862 . BFD_RELOC_HPPA_PLABEL_11,
863 . BFD_RELOC_HPPA_PLABEL_14,
864 . BFD_RELOC_HPPA_PLABEL_L21,
865 . BFD_RELOC_HPPA_PLABEL_R11,
866 . BFD_RELOC_HPPA_PLABEL_R14,
867 . BFD_RELOC_HPPA_UNWIND_ENTRY,
868 . BFD_RELOC_HPPA_UNWIND_ENTRIES,
870 . {* this must be the highest numeric value *}
872 . } bfd_reloc_code_real_type;
879 bfd_reloc_type_lookup
882 CONST struct reloc_howto_struct *
883 bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);
886 This routine returns a pointer to a howto struct which when
887 invoked, will perform the supplied relocation on data from the
893 CONST struct reloc_howto_struct *
894 DEFUN(bfd_reloc_type_lookup,(abfd, code),
896 bfd_reloc_code_real_type code)
898 return BFD_SEND (abfd, reloc_type_lookup, (abfd, code));
901 static reloc_howto_type bfd_howto_32 =
902 HOWTO(0, 00,2,32,false,0,false,true,0,"VRT32", false,0xffffffff,0xffffffff,true);
907 bfd_default_reloc_type_lookup
910 CONST struct reloc_howto_struct *bfd_default_reloc_type_lookup
912 bfd_reloc_code_real_type code);
915 Provides a default relocation lookup routine for any architecture.
920 CONST struct reloc_howto_struct *
921 DEFUN(bfd_default_reloc_type_lookup, (abfd, code),
923 bfd_reloc_code_real_type code)
928 /* The type of reloc used in a ctor, which will be as wide as the
929 address - so either a 64, 32, or 16 bitter.. */
930 switch (bfd_get_arch_info (abfd)->bits_per_address) {
934 return &bfd_howto_32;
943 return (CONST struct reloc_howto_struct *)NULL;
949 bfd_generic_relax_section
952 boolean bfd_generic_relax_section
958 Provides default handling for relaxing for back ends which
959 don't do relaxing -- i.e., does nothing.
963 DEFUN(bfd_generic_relax_section,(abfd, section, symbols),
965 asection *section AND
976 bfd_generic_get_relocated_section_contents
980 bfd_generic_get_relocated_section_contents (bfd *abfd,
981 struct bfd_seclet *seclet,
983 boolean relocateable);
986 Provides default handling of relocation effort for back ends
987 which can't be bothered to do it efficiently.
992 DEFUN(bfd_generic_get_relocated_section_contents,(abfd,
997 struct bfd_seclet *seclet AND
999 boolean relocateable)
1001 extern bfd_error_vector_type bfd_error_vector;
1003 /* Get enough memory to hold the stuff */
1004 bfd *input_bfd = seclet->u.indirect.section->owner;
1005 asection *input_section = seclet->u.indirect.section;
1009 bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1011 arelent **reloc_vector = (arelent **) alloca(reloc_size);
1013 /* read in the section */
1014 bfd_get_section_contents(input_bfd,
1018 input_section->_raw_size);
1020 /* We're not relaxing the section, so just copy the size info */
1021 input_section->_cooked_size = input_section->_raw_size;
1022 input_section->reloc_done = true;
1025 if (bfd_canonicalize_reloc(input_bfd,
1028 seclet->u.indirect.symbols) )
1031 for (parent = reloc_vector; * parent != (arelent *)NULL;
1034 bfd_reloc_status_type r=
1035 bfd_perform_relocation(input_bfd,
1039 relocateable ? abfd : (bfd *) NULL);
1043 asection *os = input_section->output_section;
1045 /* A partial link, so keep the relocs */
1046 os->orelocation[os->reloc_count] = *parent;
1050 if (r != bfd_reloc_ok)
1054 case bfd_reloc_undefined:
1055 bfd_error_vector.undefined_symbol(*parent, seclet);
1057 case bfd_reloc_dangerous:
1058 bfd_error_vector.reloc_dangerous(*parent, seclet);
1060 case bfd_reloc_outofrange:
1061 case bfd_reloc_overflow:
1062 bfd_error_vector.reloc_value_truncated(*parent, seclet);