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- /* BFD back-end for Intel 960 b.out binaries.
- Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
- Written by Cygnus Support.
-
- This file is part of BFD, the Binary File Descriptor library.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include "bfd.h"
- #include "sysdep.h"
- #include "libbfd.h"
- #include "seclet.h"
- #include "bout.h"
-
- #include "aout/stab_gnu.h"
- #include "libaout.h" /* BFD a.out internal data structures */
-
-
- extern bfd_error_vector_type bfd_error_vector;
- PROTO (static boolean, b_out_squirt_out_relocs,(bfd *abfd, asection *section));
- PROTO (static bfd_target *, b_out_callback, (bfd *));
-
- PROTO (boolean, aout_32_slurp_symbol_table, (bfd *abfd));
- PROTO (void , aout_32_write_syms, ());
-
- /* Swaps the information in an executable header taken from a raw byte
- stream memory image, into the internal exec_header structure. */
-
- PROTO(void, bout_swap_exec_header_in,
- (bfd *abfd,
- struct external_exec *raw_bytes,
- struct internal_exec *execp));
-
- void
- DEFUN(bout_swap_exec_header_in,(abfd, raw_bytes, execp),
- bfd *abfd AND
- struct external_exec *raw_bytes AND
- struct internal_exec *execp)
- {
- struct external_exec *bytes = (struct external_exec *)raw_bytes;
-
- /* Now fill in fields in the execp, from the bytes in the raw data. */
- execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
- execp->a_text = GET_WORD (abfd, bytes->e_text);
- execp->a_data = GET_WORD (abfd, bytes->e_data);
- execp->a_bss = GET_WORD (abfd, bytes->e_bss);
- execp->a_syms = GET_WORD (abfd, bytes->e_syms);
- execp->a_entry = GET_WORD (abfd, bytes->e_entry);
- execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
- execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
- execp->a_tload = GET_WORD (abfd, bytes->e_tload);
- execp->a_dload = GET_WORD (abfd, bytes->e_dload);
- execp->a_talign = bytes->e_talign[0];
- execp->a_dalign = bytes->e_dalign[0];
- execp->a_balign = bytes->e_balign[0];
- execp->a_relaxable = bytes->e_relaxable[0];
- }
-
- /* Swaps the information in an internal exec header structure into the
- supplied buffer ready for writing to disk. */
-
- PROTO(void, bout_swap_exec_header_out,
- (bfd *abfd,
- struct internal_exec *execp,
- struct external_exec *raw_bytes));
- void
- DEFUN(bout_swap_exec_header_out,(abfd, execp, raw_bytes),
- bfd *abfd AND
- struct internal_exec *execp AND
- struct external_exec *raw_bytes)
- {
- struct external_exec *bytes = (struct external_exec *)raw_bytes;
-
- /* Now fill in fields in the raw data, from the fields in the exec struct. */
- bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
- PUT_WORD (abfd, execp->a_text , bytes->e_text);
- PUT_WORD (abfd, execp->a_data , bytes->e_data);
- PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
- PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
- PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
- PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
- PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
- PUT_WORD (abfd, execp->a_tload , bytes->e_tload);
- PUT_WORD (abfd, execp->a_dload , bytes->e_dload);
- bytes->e_talign[0] = execp->a_talign;
- bytes->e_dalign[0] = execp->a_dalign;
- bytes->e_balign[0] = execp->a_balign;
- bytes->e_relaxable[0] = execp->a_relaxable;
- }
-
-
- static bfd_target *
- b_out_object_p (abfd)
- bfd *abfd;
- {
- struct internal_exec anexec;
- struct external_exec exec_bytes;
-
- if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
- != EXEC_BYTES_SIZE) {
- bfd_error = wrong_format;
- return 0;
- }
-
- anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
-
- if (N_BADMAG (anexec)) {
- bfd_error = wrong_format;
- return 0;
- }
-
- bout_swap_exec_header_in (abfd, &exec_bytes, &anexec);
- return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback);
- }
-
-
- /* Finish up the opening of a b.out file for reading. Fill in all the
- fields that are not handled by common code. */
-
- static bfd_target *
- b_out_callback (abfd)
- bfd *abfd;
- {
- struct internal_exec *execp = exec_hdr (abfd);
- unsigned long bss_start;
-
- /* Architecture and machine type */
- bfd_set_arch_mach(abfd,
- bfd_arch_i960, /* B.out only used on i960 */
- bfd_mach_i960_core /* Default */
- );
-
- /* The positions of the string table and symbol table. */
- obj_str_filepos (abfd) = N_STROFF (*execp);
- obj_sym_filepos (abfd) = N_SYMOFF (*execp);
-
- /* The alignments of the sections */
- obj_textsec (abfd)->alignment_power = execp->a_talign;
- obj_datasec (abfd)->alignment_power = execp->a_dalign;
- obj_bsssec (abfd)->alignment_power = execp->a_balign;
-
- /* The starting addresses of the sections. */
- obj_textsec (abfd)->vma = execp->a_tload;
- obj_datasec (abfd)->vma = execp->a_dload;
-
- /* And reload the sizes, since the aout module zaps them */
- obj_textsec (abfd)->_raw_size = execp->a_text;
-
- bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
- obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
-
- /* The file positions of the sections */
- obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
- obj_datasec (abfd)->filepos = N_DATOFF(*execp);
-
- /* The file positions of the relocation info */
- obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
- obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
-
- adata(abfd).page_size = 1; /* Not applicable. */
- adata(abfd).segment_size = 1; /* Not applicable. */
- adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
-
- if (execp->a_relaxable)
- abfd->flags |= BFD_IS_RELAXABLE;
- return abfd->xvec;
- }
-
- struct bout_data_struct {
- struct aoutdata a;
- struct internal_exec e;
- };
-
- static boolean
- b_out_mkobject (abfd)
- bfd *abfd;
- {
- struct bout_data_struct *rawptr;
-
- rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
- if (rawptr == NULL) {
- bfd_error = no_memory;
- return false;
- }
-
- abfd->tdata.bout_data = rawptr;
- exec_hdr (abfd) = &rawptr->e;
-
- /* For simplicity's sake we just make all the sections right here. */
- obj_textsec (abfd) = (asection *)NULL;
- obj_datasec (abfd) = (asection *)NULL;
- obj_bsssec (abfd) = (asection *)NULL;
-
- bfd_make_section (abfd, ".text");
- bfd_make_section (abfd, ".data");
- bfd_make_section (abfd, ".bss");
-
- return true;
- }
-
- static boolean
- b_out_write_object_contents (abfd)
- bfd *abfd;
- {
- struct external_exec swapped_hdr;
-
- exec_hdr (abfd)->a_info = BMAGIC;
-
- exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
- exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
- exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
- exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
- exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
- exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
- sizeof (struct relocation_info));
- exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
- sizeof (struct relocation_info));
-
- exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
- exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
- exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
-
- exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
- exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
-
- bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
-
- bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
- bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd);
-
- /* Now write out reloc info, followed by syms and strings */
- if (bfd_get_symcount (abfd) != 0)
- {
- bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET);
-
- aout_32_write_syms (abfd);
-
- bfd_seek (abfd, (file_ptr)(N_TROFF(*exec_hdr(abfd))), SEEK_SET);
-
- if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
- bfd_seek (abfd, (file_ptr)(N_DROFF(*exec_hdr(abfd))), SEEK_SET);
-
- if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
- }
- return true;
- }
-
- /** Some reloc hackery */
-
- #define CALLS 0x66003800 /* Template for 'calls' instruction */
- #define BAL 0x0b000000 /* Template for 'bal' instruction */
- #define BALX 0x85000000 /* Template for 'balx' instruction */
- #define BAL_MASK 0x00ffffff
- #define CALL 0x09000000
- #define PCREL13_MASK 0x1fff
- /* Magic to turn callx into calljx */
- static bfd_reloc_status_type
- DEFUN (calljx_callback, (abfd, reloc_entry, src, dst, input_section, seclet),
- bfd *abfd AND
- arelent *reloc_entry AND
- PTR src AND
- PTR dst AND
- asection *input_section AND
- bfd_seclet_type *seclet)
- {
- int word = bfd_get_32(abfd, src);
- asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
- aout_symbol_type *symbol = aout_symbol(symbol_in);
-
- if (symbol_in->section == &bfd_und_section)
- {
- bfd_error_vector.undefined_symbol(reloc_entry, seclet);
- }
-
- if (IS_CALLNAME(symbol->other))
- {
-
- aout_symbol_type *balsym = symbol+1;
- int inst = bfd_get_32(abfd, (bfd_byte *) src-4);
- /* The next symbol should be an N_BALNAME */
- BFD_ASSERT(IS_BALNAME(balsym->other));
- inst &= BAL_MASK;
- inst |= BALX;
- bfd_put_32(abfd, inst, (bfd_byte *) dst-4);
- symbol = balsym;
- }
-
- word += symbol->symbol.section->output_offset +
- symbol->symbol.section->output_section->vma +
- symbol->symbol.value + reloc_entry->addend;
-
- bfd_put_32(abfd, word, dst);
- return bfd_reloc_ok;
- }
-
-
- /* Magic to turn call into callj */
- static bfd_reloc_status_type
- DEFUN (callj_callback, (abfd, reloc_entry, data, srcidx,dstidx,
- input_section, seclet),
- bfd *abfd AND
- arelent *reloc_entry AND
- PTR data AND
- unsigned int srcidx AND
- unsigned int dstidx AND
- asection *input_section AND
- bfd_seclet_type *seclet)
- {
- int word = bfd_get_32(abfd, (bfd_byte *) data + srcidx);
- asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
-
- aout_symbol_type *symbol = aout_symbol(symbol_in);
-
- if (symbol_in->section == &bfd_und_section)
- {
- bfd_error_vector.undefined_symbol(reloc_entry, seclet);
- }
-
- if (IS_OTHER(symbol->other))
- {
- /* Call to a system procedure - replace code with system
- procedure number */
- word = CALLS | (symbol->other - 1);
-
- }
-
- else if (IS_CALLNAME(symbol->other))
- {
- aout_symbol_type *balsym = symbol+1;
- /* The next symbol should be an N_BALNAME */
- BFD_ASSERT(IS_BALNAME(balsym->other));
-
- /* We are calling a leaf - so replace the call instruction
- with a bal */
-
- word = BAL |
- (((word & BAL_MASK) +
- balsym->symbol.section->output_offset +
- balsym->symbol.section->output_section->vma+
- balsym->symbol.value + reloc_entry->addend - dstidx -
- ( input_section->output_section->vma + input_section->output_offset))
- & BAL_MASK);
-
-
- }
- else
- {
-
- word = CALL |
- (((word & BAL_MASK) +
- symbol->symbol.section->output_offset +
- symbol->symbol.section->output_section->vma+
- symbol->symbol.value + reloc_entry->addend - dstidx -
- ( input_section->output_section->vma + input_section->output_offset))
- & BAL_MASK);
- }
- bfd_put_32(abfd, word, (bfd_byte *) data + dstidx);
- return bfd_reloc_ok;
- }
-
- /* type rshift size bitsize pcrel bitpos absolute overflow check*/
-
- #define ABS32CODE 0
- #define ABS32CODE_SHRUNK 1
- #define PCREL24 2
- #define CALLJ 3
- #define ABS32 4
- #define PCREL13 5
- #define ABS32_MAYBE_RELAXABLE 1
- #define ABS32_WAS_RELAXABLE 2
-
- #define ALIGNER 10
- #define ALIGNDONE 11
- static reloc_howto_type howto_reloc_callj =
- HOWTO(CALLJ, 0, 2, 24, true, 0, true, true, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
- static reloc_howto_type howto_reloc_abs32 =
- HOWTO(ABS32, 0, 2, 32, false, 0, true, true,0,"abs32", true, 0xffffffff,0xffffffff,false);
- static reloc_howto_type howto_reloc_pcrel24 =
- HOWTO(PCREL24, 0, 2, 24, true, 0, true, true,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
-
- static reloc_howto_type howto_reloc_pcrel13 =
- HOWTO(PCREL13, 0, 2, 13, true, 0, true, true,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
-
-
- static reloc_howto_type howto_reloc_abs32codeshrunk =
- HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, true, true, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
-
- static reloc_howto_type howto_reloc_abs32code =
- HOWTO(ABS32CODE, 0, 2, 32, false, 0, true, true,0,"callx", true, 0xffffffff,0xffffffff,false);
-
- static reloc_howto_type howto_align_table[] = {
- HOWTO (ALIGNER, 0, 0x1, 0, false, 0, false, false, 0, "align16", false, 0, 0, false),
- HOWTO (ALIGNER, 0, 0x3, 0, false, 0, false, false, 0, "align32", false, 0, 0, false),
- HOWTO (ALIGNER, 0, 0x7, 0, false, 0, false, false, 0, "align64", false, 0, 0, false),
- HOWTO (ALIGNER, 0, 0xf, 0, false, 0, false, false, 0, "align128", false, 0, 0, false),
- };
-
- static reloc_howto_type howto_done_align_table[] = {
- HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, false, false, 0, "donealign16", false, 0, 0, false),
- HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, false, false, 0, "donealign32", false, 0, 0, false),
- HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, false, false, 0, "donealign64", false, 0, 0, false),
- HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, false, false, 0, "donealign128", false, 0, 0, false),
- };
-
- static reloc_howto_type *
- b_out_reloc_type_lookup (abfd, code)
- bfd *abfd;
- bfd_reloc_code_real_type code;
- {
- switch (code)
- {
- default:
- return 0;
- case BFD_RELOC_I960_CALLJ:
- return &howto_reloc_callj;
- case BFD_RELOC_32:
- return &howto_reloc_abs32;
- case BFD_RELOC_24_PCREL:
- return &howto_reloc_pcrel24;
- }
- }
-
- /* Allocate enough room for all the reloc entries, plus pointers to them all */
-
- static boolean
- b_out_slurp_reloc_table (abfd, asect, symbols)
- bfd *abfd;
- sec_ptr asect;
- asymbol **symbols;
- {
- register struct relocation_info *rptr;
- unsigned int counter ;
- arelent *cache_ptr ;
- int extern_mask, pcrel_mask, callj_mask, length_shift;
- int incode_mask;
- int size_mask;
- bfd_vma prev_addr = 0;
- unsigned int count;
- size_t reloc_size;
- struct relocation_info *relocs;
- arelent *reloc_cache;
-
- if (asect->relocation) return true;
- if (!aout_32_slurp_symbol_table (abfd)) return false;
-
- if (asect == obj_datasec (abfd)) {
- reloc_size = exec_hdr(abfd)->a_drsize;
- goto doit;
- }
-
- if (asect == obj_textsec (abfd)) {
- reloc_size = exec_hdr(abfd)->a_trsize;
- goto doit;
- }
-
- bfd_error = invalid_operation;
- return false;
-
- doit:
- bfd_seek (abfd, (file_ptr)(asect->rel_filepos), SEEK_SET);
- count = reloc_size / sizeof (struct relocation_info);
-
- relocs = (struct relocation_info *) bfd_xmalloc (reloc_size);
- if (!relocs) {
- bfd_error = no_memory;
- return false;
- }
- reloc_cache = (arelent *) bfd_xmalloc ((count+1) * sizeof (arelent));
- if (!reloc_cache) {
- free ((char*)relocs);
- bfd_error = no_memory;
- return false;
- }
-
- if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
- bfd_error = system_call_error;
- free (reloc_cache);
- free (relocs);
- return false;
- }
-
-
-
- if (abfd->xvec->header_byteorder_big_p) {
- /* big-endian bit field allocation order */
- pcrel_mask = 0x80;
- extern_mask = 0x10;
- incode_mask = 0x08;
- callj_mask = 0x02;
- size_mask = 0x20;
- length_shift = 5;
- } else {
- /* little-endian bit field allocation order */
- pcrel_mask = 0x01;
- extern_mask = 0x08;
- incode_mask = 0x10;
- callj_mask = 0x40;
- size_mask = 0x02;
- length_shift = 1;
- }
-
- for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
- counter < count;
- counter++, rptr++, cache_ptr++)
- {
- unsigned char *raw = (unsigned char *)rptr;
- unsigned int symnum;
- cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
- cache_ptr->howto = 0;
- if (abfd->xvec->header_byteorder_big_p)
- {
- symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
- }
- else
- {
- symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
- }
-
- if (raw[7] & extern_mask)
- {
- /* if this is set then the r_index is a index into the symbol table;
- * if the bit is not set then r_index contains a section map.
- * we either fill in the sym entry with a pointer to the symbol,
- * or point to the correct section
- */
- cache_ptr->sym_ptr_ptr = symbols + symnum;
- cache_ptr->addend = 0;
- } else
- {
- /* in a.out symbols are relative to the beginning of the
- * file rather than sections ?
- * (look in translate_from_native_sym_flags)
- * the reloc entry addend has added to it the offset into the
- * file of the data, so subtract the base to make the reloc
- * section relative */
- int s;
- {
- /* sign-extend symnum from 24 bits to whatever host uses */
- s = symnum;
- if (s & (1 << 23))
- s |= (~0) << 24;
- }
- cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
- switch (s)
- {
- case N_TEXT:
- case N_TEXT | N_EXT:
- cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr;
- cache_ptr->addend = - obj_textsec(abfd)->vma;
- break;
- case N_DATA:
- case N_DATA | N_EXT:
- cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr;
- cache_ptr->addend = - obj_datasec(abfd)->vma;
- break;
- case N_BSS:
- case N_BSS | N_EXT:
- cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
- cache_ptr->addend = - obj_bsssec(abfd)->vma;
- break;
- case N_ABS:
- case N_ABS | N_EXT:
- cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
- cache_ptr->addend = 0;
- break;
- case -2: /* .align */
- if (raw[7] & pcrel_mask)
- {
- cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3];
- cache_ptr->sym_ptr_ptr = &bfd_abs_symbol;
- }
- else
- {
- /* .org? */
- abort ();
- }
- cache_ptr->addend = 0;
- break;
- default:
- BFD_ASSERT(0);
- break;
- }
-
- }
-
- /* the i960 only has a few relocation types:
- abs 32-bit and pcrel 24bit. except for callj's! */
- if (cache_ptr->howto != 0)
- ;
- else if (raw[7] & callj_mask)
- {
- cache_ptr->howto = &howto_reloc_callj;
- }
- else if ( raw[7] & pcrel_mask)
- {
- if (raw[7] & size_mask)
- cache_ptr->howto = &howto_reloc_pcrel13;
- else
- cache_ptr->howto = &howto_reloc_pcrel24;
- }
- else
- {
- if (raw[7] & incode_mask)
- {
- cache_ptr->howto = &howto_reloc_abs32code;
- }
- else
- {
- cache_ptr->howto = &howto_reloc_abs32;
- }
- }
- if (cache_ptr->address < prev_addr)
- {
- /* Ouch! this reloc is out of order, insert into the right place
- */
- arelent tmp;
- arelent *cursor = cache_ptr-1;
- bfd_vma stop = cache_ptr->address;
- tmp = *cache_ptr;
- while (cursor->address > stop && cursor >= reloc_cache)
- {
- cursor[1] = cursor[0];
- cursor--;
- }
- cursor[1] = tmp;
- }
- else
- {
- prev_addr = cache_ptr->address;
- }
- }
-
-
- free (relocs);
- asect->relocation = reloc_cache;
- asect->reloc_count = count;
-
-
- return true;
- }
-
-
- static boolean
- b_out_squirt_out_relocs (abfd, section)
- bfd *abfd;
- asection *section;
- {
-
- arelent **generic;
- int r_extern = 0;
- int r_idx;
- int incode_mask;
- int len_1;
- unsigned int count = section->reloc_count;
- struct relocation_info *native, *natptr;
- size_t natsize = count * sizeof (struct relocation_info);
- int extern_mask, pcrel_mask, len_2, callj_mask;
- if (count == 0) return true;
- generic = section->orelocation;
- native = ((struct relocation_info *) bfd_xmalloc (natsize));
- if (!native) {
- bfd_error = no_memory;
- return false;
- }
-
- if (abfd->xvec->header_byteorder_big_p)
- {
- /* Big-endian bit field allocation order */
- pcrel_mask = 0x80;
- extern_mask = 0x10;
- len_2 = 0x40;
- len_1 = 0x20;
- callj_mask = 0x02;
- incode_mask = 0x08;
- }
- else
- {
- /* Little-endian bit field allocation order */
- pcrel_mask = 0x01;
- extern_mask = 0x08;
- len_2 = 0x04;
- len_1 = 0x02;
- callj_mask = 0x40;
- incode_mask = 0x10;
- }
-
- for (natptr = native; count > 0; --count, ++natptr, ++generic)
- {
- arelent *g = *generic;
- unsigned char *raw = (unsigned char *)natptr;
- asymbol *sym = *(g->sym_ptr_ptr);
-
- asection *output_section = sym->section->output_section;
-
- bfd_h_put_32(abfd, g->address, raw);
- /* Find a type in the output format which matches the input howto -
- * at the moment we assume input format == output format FIXME!!
- */
- r_idx = 0;
- /* FIXME: Need callj stuff here, and to check the howto entries to
- be sure they are real for this architecture. */
- if (g->howto== &howto_reloc_callj)
- {
- raw[7] = callj_mask + pcrel_mask + len_2;
- }
- else if (g->howto == &howto_reloc_pcrel24)
- {
- raw[7] = pcrel_mask + len_2;
- }
- else if (g->howto == &howto_reloc_pcrel13)
- {
- raw[7] = pcrel_mask + len_1;
- }
- else if (g->howto == &howto_reloc_abs32code)
- {
- raw[7] = len_2 + incode_mask;
- }
- else if (g->howto >= howto_align_table
- && g->howto <= (howto_align_table
- + sizeof (howto_align_table) / sizeof (howto_align_table[0])
- - 1))
- {
- /* symnum == -2; extern_mask not set, pcrel_mask set */
- r_idx = -2;
- r_extern = 0;
- raw[7] = (pcrel_mask
- | ((g->howto - howto_align_table) << 1));
- }
- else {
- raw[7] = len_2;
- }
-
- if (r_idx != 0)
- /* already mucked with r_extern, r_idx */;
- else if (bfd_is_com_section (output_section)
- || output_section == &bfd_abs_section
- || output_section == &bfd_und_section)
- {
-
- if (bfd_abs_section.symbol == sym)
- {
- /* Whoops, looked like an abs symbol, but is really an offset
- from the abs section */
- r_idx = 0;
- r_extern = 0;
- }
- else
- {
- /* Fill in symbol */
-
- r_extern = 1;
- r_idx = stoi((*(g->sym_ptr_ptr))->flags);
- }
- }
- else
- {
- /* Just an ordinary section */
- r_extern = 0;
- r_idx = output_section->target_index;
- }
-
- if (abfd->xvec->header_byteorder_big_p) {
- raw[4] = (unsigned char) (r_idx >> 16);
- raw[5] = (unsigned char) (r_idx >> 8);
- raw[6] = (unsigned char) (r_idx );
- } else {
- raw[6] = (unsigned char) (r_idx >> 16);
- raw[5] = (unsigned char) (r_idx>> 8);
- raw[4] = (unsigned char) (r_idx );
- }
- if (r_extern)
- raw[7] |= extern_mask;
- }
-
- if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
- free((PTR)native);
- return false;
- }
- free ((PTR)native);
-
- return true;
- }
-
- /* This is stupid. This function should be a boolean predicate */
- static unsigned int
- b_out_canonicalize_reloc (abfd, section, relptr, symbols)
- bfd *abfd;
- sec_ptr section;
- arelent **relptr;
- asymbol **symbols;
- {
- arelent *tblptr = section->relocation;
- unsigned int count = 0;
-
- if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols))) return 0;
- tblptr = section->relocation;
- if (!tblptr) return 0;
-
- for (; count++ < section->reloc_count;)
- *relptr++ = tblptr++;
-
- *relptr = 0;
-
- return section->reloc_count;
- }
-
- static unsigned int
- b_out_get_reloc_upper_bound (abfd, asect)
- bfd *abfd;
- sec_ptr asect;
- {
- if (bfd_get_format (abfd) != bfd_object) {
- bfd_error = invalid_operation;
- return 0;
- }
-
- if (asect == obj_datasec (abfd))
- return (sizeof (arelent *) *
- ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
- +1));
-
- if (asect == obj_textsec (abfd))
- return (sizeof (arelent *) *
- ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
- +1));
-
- bfd_error = invalid_operation;
- return 0;
- }
-
- static boolean
- b_out_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- unsigned char *location;
- file_ptr offset;
- int count;
- {
-
- if (abfd->output_has_begun == false) { /* set by bfd.c handler */
- if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
- (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/) {
- bfd_error = invalid_operation;
- return false;
- }
-
- obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
- obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
- + obj_textsec (abfd)->_raw_size;
-
- }
- /* regardless, once we know what we're doing, we might as well get going */
- bfd_seek (abfd, section->filepos + offset, SEEK_SET);
-
- if (count != 0) {
- return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
- }
- return true;
- }
-
- static boolean
- b_out_set_arch_mach (abfd, arch, machine)
- bfd *abfd;
- enum bfd_architecture arch;
- unsigned long machine;
- {
- bfd_default_set_arch_mach(abfd, arch, machine);
-
- if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
- return true;
- if (arch == bfd_arch_i960) /* i960 default is OK */
- switch (machine) {
- case bfd_mach_i960_core:
- case bfd_mach_i960_kb_sb:
- case bfd_mach_i960_mc:
- case bfd_mach_i960_xa:
- case bfd_mach_i960_ca:
- case bfd_mach_i960_ka_sa:
- case 0:
- return true;
- default:
- return false;
- }
-
- return false;
- }
-
- static int
- DEFUN(b_out_sizeof_headers,(ignore_abfd, ignore),
- bfd *ignore_abfd AND
- boolean ignore)
- {
- return sizeof(struct internal_exec);
- }
-
-
-
- /************************************************************************/
- static bfd_vma
- DEFUN(get_value,(reloc, seclet),
- arelent *reloc AND
- bfd_seclet_type *seclet)
- {
- bfd_vma value;
- asymbol *symbol = *(reloc->sym_ptr_ptr);
-
- /* A symbol holds a pointer to a section, and an offset from the
- base of the section. To relocate, we find where the section will
- live in the output and add that in */
-
- if (symbol->section == &bfd_und_section)
- {
- /* Ouch, this is an undefined symbol.. */
- bfd_error_vector.undefined_symbol(reloc, seclet);
- value = symbol->value;
- }
- else
- {
- value = symbol->value +
- symbol->section->output_offset +
- symbol->section->output_section->vma;
- }
-
- /* Add the value contained in the relocation */
- value += reloc->addend;
-
- return value;
- }
-
- static void
- DEFUN(perform_slip,(s, slip, input_section, value),
- asymbol **s AND
- unsigned int slip AND
- asection *input_section AND
- bfd_vma value)
- {
-
- /* Find all symbols past this point, and make them know
- what's happened */
- while (*s)
- {
- asymbol *p = *s;
- if (p->section == input_section)
- {
- /* This was pointing into this section, so mangle it */
- if (p->value > value)
- {
- p->value -=slip;
- }
- }
- s++;
-
- }
- }
- #if 1
- /* This routine works out if the thing we want to get to can be
- reached with a 24bit offset instead of a 32 bit one.
- If it can, then it changes the amode */
-
- static int
- DEFUN(abs32code,(input_section, symbols, r, shrink),
- asection *input_section AND
- asymbol **symbols AND
- arelent *r AND
- unsigned int shrink)
- {
- bfd_vma value = get_value(r,0);
- bfd_vma dot = input_section->output_section->vma + input_section->output_offset + r->address;
- bfd_vma gap;
-
- /* See if the address we're looking at within 2^23 bytes of where
- we are, if so then we can use a small branch rather than the
- jump we were going to */
-
- gap = value - (dot - shrink);
-
-
- if (-1<<23 < (long)gap && (long)gap < 1<<23 )
- {
- /* Change the reloc type from 32bitcode possible 24, to 24bit
- possible 32 */
-
- r->howto = &howto_reloc_abs32codeshrunk;
- /* The place to relc moves back by four bytes */
- r->address -=4;
-
- /* This will be four bytes smaller in the long run */
- shrink += 4 ;
- perform_slip(symbols, 4, input_section, r->address-shrink +4);
- }
- return shrink;
- }
-
- static int
- DEFUN(aligncode,(input_section, symbols, r, shrink),
- asection *input_section AND
- asymbol **symbols AND
- arelent *r AND
- unsigned int shrink)
- {
- bfd_vma dot = input_section->output_section->vma + input_section->output_offset + r->address;
- bfd_vma gap;
- bfd_vma old_end;
- bfd_vma new_end;
- int shrink_delta;
- int size = r->howto->size;
-
- /* Reduce the size of the alignment so that it's still aligned but
- smaller - the current size is already the same size as or bigger
- than the alignment required. */
-
- /* calculate the first byte following the padding before we optimize */
- old_end = ((dot + size ) & ~size) + size+1;
- /* work out where the new end will be - remember that we're smaller
- than we used to be */
- new_end = ((dot - shrink + size) & ~size);
-
- /* This is the new end */
- gap = old_end - ((dot + size) & ~size);
-
- shrink_delta = (old_end - new_end) - shrink;
-
- if (shrink_delta)
- {
- /* Change the reloc so that it knows how far to align to */
- r->howto = howto_done_align_table + (r->howto - howto_align_table);
-
- /* Encode the stuff into the addend - for future use we need to
- know how big the reloc used to be */
- r->addend = old_end ;
-
- /* This will be N bytes smaller in the long run, adjust all the symbols */
- perform_slip(symbols, shrink_delta, input_section, r->address - shrink );
- shrink += shrink_delta;
- }
- return shrink;
- }
-
-
- static boolean
- DEFUN(b_out_relax_section,(abfd, i, symbols),
- bfd *abfd AND
- asection *i AND
- asymbol **symbols)
- {
-
- /* Get enough memory to hold the stuff */
- bfd *input_bfd = i->owner;
- asection *input_section = i;
- int shrink = 0 ;
- boolean new = false;
-
- bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
- input_section);
- arelent **reloc_vector = (arelent **)alloca(reloc_size);
-
- /* Get the relocs and think about them */
- if (bfd_canonicalize_reloc(input_bfd,
- input_section,
- reloc_vector,
- symbols))
- {
- arelent **parent;
- for (parent = reloc_vector; *parent; parent++)
- {
- arelent *r = *parent;
- switch (r->howto->type) {
- case ALIGNER:
- /* An alignment reloc */
- shrink = aligncode(input_section, symbols, r,shrink);
- new=true;
- break;
- case ABS32CODE:
- /* A 32bit reloc in an addressing mode */
- shrink = abs32code(input_section, symbols, r,shrink);
- new=true;
- break;
- case ABS32CODE_SHRUNK:
- shrink+=4;
- break;
- }
- }
- }
- input_section->_cooked_size = input_section->_raw_size - shrink;
-
- return new;
- }
-
- #endif
- static bfd_byte *
- DEFUN(b_out_get_relocated_section_contents,(in_abfd,
- seclet,
- data,
- relocateable),
- bfd *in_abfd AND
- bfd_seclet_type *seclet AND
- bfd_byte *data AND
- boolean relocateable)
- {
- /* Get enough memory to hold the stuff */
- bfd *input_bfd = seclet->u.indirect.section->owner;
- asection *input_section = seclet->u.indirect.section;
- bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
- input_section);
- arelent **reloc_vector = (arelent **)alloca(reloc_size);
-
- /* If producing relocateable output, don't bother to relax. */
- if (relocateable)
- return bfd_generic_get_relocated_section_contents (in_abfd, seclet,
- data, relocateable);
-
- /* read in the section */
- bfd_get_section_contents(input_bfd,
- input_section,
- data,
- 0,
- input_section->_raw_size);
-
-
- if (bfd_canonicalize_reloc(input_bfd,
- input_section,
- reloc_vector,
- seclet->u.indirect.symbols) )
- {
- arelent **parent = reloc_vector;
- arelent *reloc ;
-
-
-
- unsigned int dst_address = 0;
- unsigned int src_address = 0;
- unsigned int run;
- unsigned int idx;
-
- /* Find how long a run we can do */
- while (dst_address < seclet->size)
- {
-
- reloc = *parent;
- if (reloc)
- {
- /* Note that the relaxing didn't tie up the addresses in the
- relocation, so we use the original address to work out the
- run of non-relocated data */
- run = reloc->address - src_address;
- parent++;
-
- }
- else
- {
- run = seclet->size - dst_address;
- }
- /* Copy the bytes */
- for (idx = 0; idx < run; idx++)
- {
- data[dst_address++] = data[src_address++];
- }
-
- /* Now do the relocation */
-
- if (reloc)
- {
- switch (reloc->howto->type)
- {
- case ABS32CODE:
- calljx_callback(in_abfd, reloc, src_address + data, dst_address+data,
- input_section, seclet);
- src_address+=4;
- dst_address+=4;
- break;
- case ABS32:
- bfd_put_32(in_abfd,
- (bfd_get_32 (in_abfd, data+src_address)
- + get_value(reloc, seclet)),
- data+dst_address);
- src_address+=4;
- dst_address+=4;
- break;
- case CALLJ:
- callj_callback(in_abfd, reloc ,data,src_address,dst_address,
- input_section, seclet);
- src_address+=4;
- dst_address+=4;
- break;
- case ALIGNDONE:
- src_address = reloc->addend;
- dst_address = (dst_address + reloc->howto->size) & ~reloc->howto->size;
- break;
- case ABS32CODE_SHRUNK:
- /* This used to be a callx, but we've found out that a
- callj will reach, so do the right thing */
- callj_callback(in_abfd, reloc,data,src_address+4, dst_address,
- input_section, seclet);
-
- dst_address+=4;
- src_address+=8;
- break;
- case PCREL24:
- {
- long int word = bfd_get_32(in_abfd, data+src_address);
- asymbol *symbol = *(reloc->sym_ptr_ptr);
- if (symbol->section == &bfd_und_section)
- {
- bfd_error_vector.undefined_symbol(reloc, seclet);
- }
- word = ((word & ~BAL_MASK)
- | (((word & BAL_MASK)
- /* value of symbol */
- + symbol->value
- /* how far it's moving in this relocation */
- + (symbol->section->output_offset
- + symbol->section->output_section->vma)
- - (input_section->output_section->vma
- + input_section->output_offset)
- /* addend, of course */
- + reloc->addend)
- & BAL_MASK));
-
- bfd_put_32(in_abfd,word, data+dst_address);
- dst_address+=4;
- src_address+=4;
-
- }
- break;
-
- case PCREL13:
- {
- long int word = bfd_get_32(in_abfd, data+src_address);
- asymbol *symbol = *(reloc->sym_ptr_ptr);
- if (symbol->section == &bfd_und_section)
- {
- bfd_error_vector.undefined_symbol(reloc, seclet);
- }
- word = ((word & ~PCREL13_MASK)
- | (((word & PCREL13_MASK)
- + (symbol->section->output_offset
- + symbol->section->output_section->vma)
- + symbol->value
- + reloc->addend
- - (input_section->output_section->vma
- + input_section->output_offset))
- & PCREL13_MASK));
-
- bfd_put_32(in_abfd,word, data+dst_address);
- dst_address+=4;
- src_address+=4;
-
- }
- break;
-
- default:
-
- abort();
- }
- }
- }
- }
- return data;
- }
- /***********************************************************************/
-
- /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
-
- /* We don't have core files. */
- #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
- #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
- #define aout_32_core_file_matches_executable_p \
- _bfd_dummy_core_file_matches_executable_p
-
- /* We use BSD-Unix generic archive files. */
- #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
- #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
- #define aout_32_slurp_armap bfd_slurp_bsd_armap
- #define aout_32_slurp_extended_name_table _bfd_slurp_extended_name_table
- #define aout_32_write_armap bsd_write_armap
- #define aout_32_truncate_arname bfd_bsd_truncate_arname
-
- /* We override these routines from the usual a.out file routines. */
- #define aout_32_canonicalize_reloc b_out_canonicalize_reloc
- #define aout_32_get_reloc_upper_bound b_out_get_reloc_upper_bound
- #define aout_32_set_section_contents b_out_set_section_contents
- #define aout_32_set_arch_mach b_out_set_arch_mach
- #define aout_32_sizeof_headers b_out_sizeof_headers
-
- #define aout_32_bfd_debug_info_start bfd_void
- #define aout_32_bfd_debug_info_end bfd_void
- #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
-
- #define aout_32_bfd_get_relocated_section_contents b_out_get_relocated_section_contents
- #define aout_32_bfd_relax_section b_out_relax_section
- #define aout_32_bfd_seclet_link bfd_generic_seclet_link
- #define aout_32_bfd_reloc_type_lookup b_out_reloc_type_lookup
- #define aout_32_bfd_make_debug_symbol \
- ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
-
- bfd_target b_out_vec_big_host =
- {
- "b.out.big", /* name */
- bfd_target_aout_flavour,
- false, /* data byte order is little */
- true, /* hdr byte order is big */
- (HAS_RELOC | EXEC_P | /* object flags */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
- '_', /* symbol leading char */
- ' ', /* ar_pad_char */
- 16, /* ar_max_namelen */
- 2, /* minumum alignment power */
-
- _do_getl64, _do_getl_signed_64, _do_putl64,
- _do_getl32, _do_getl_signed_32, _do_putl32,
- _do_getl16, _do_getl_signed_16, _do_putl16, /* data */
- _do_getb64, _do_getb_signed_64, _do_putb64,
- _do_getb32, _do_getb_signed_32, _do_putb32,
- _do_getb16, _do_getb_signed_16, _do_putb16, /* hdrs */
- {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
- bfd_generic_archive_p, _bfd_dummy_target},
- {bfd_false, b_out_mkobject, /* bfd_set_format */
- _bfd_generic_mkarchive, bfd_false},
- {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
- _bfd_write_archive_contents, bfd_false},
-
- JUMP_TABLE(aout_32),
- (PTR) 0,
- };
-
-
- bfd_target b_out_vec_little_host =
- {
- "b.out.little", /* name */
- bfd_target_aout_flavour,
- false, /* data byte order is little */
- false, /* header byte order is little */
- (HAS_RELOC | EXEC_P | /* object flags */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
- '_', /* symbol leading char */
- ' ', /* ar_pad_char */
- 16, /* ar_max_namelen */
- 2, /* minum align */
- _do_getl64, _do_getl_signed_64, _do_putl64,
- _do_getl32, _do_getl_signed_32, _do_putl32,
- _do_getl16, _do_getl_signed_16, _do_putl16, /* data */
- _do_getl64, _do_getl_signed_64, _do_putl64,
- _do_getl32, _do_getl_signed_32, _do_putl32,
- _do_getl16, _do_getl_signed_16, _do_putl16, /* hdrs */
-
- {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
- bfd_generic_archive_p, _bfd_dummy_target},
- {bfd_false, b_out_mkobject, /* bfd_set_format */
- _bfd_generic_mkarchive, bfd_false},
- {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
- _bfd_write_archive_contents, bfd_false},
- JUMP_TABLE(aout_32),
- (PTR) 0
- };
-