/* BFD back-end for Intel 960 b.out binaries. Copyright (C) 1990-1991 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, 0L, 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, (long)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET); aout_32_write_syms (abfd); bfd_seek (abfd, (long)(N_TROFF(*exec_hdr(abfd))), SEEK_SET); if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false; bfd_seek (abfd, (long)(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), bfd *abfd AND arelent *reloc_entry AND PTR src AND PTR dst AND asection *input_section) { int word = bfd_get_32(abfd, src); asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); aout_symbol_type *symbol = aout_symbol(symbol_in); 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), bfd *abfd AND arelent *reloc_entry AND PTR data AND unsigned int srcidx AND unsigned int dstidx AND asection *input_section ) { 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 (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 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 * 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; 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, (long)(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; } else { /* little-endian bit field allocation order */ pcrel_mask = 0x01; extern_mask = 0x08; incode_mask = 0x10; callj_mask = 0x40; size_mask = 0x02; } 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); 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 */ cache_ptr->sym_ptr_ptr = (asymbol **)NULL; switch (symnum) { 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; default: BFD_ASSERT(0); break; } } /* the i960 only has a few relocation types: abs 32-bit and pcrel 24bit. except for callj's! */ 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; unsigned int where = counter; bfd_vma stop = cache_ptr->address; tmp = *cache_ptr; while (cursor->address > stop) { 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; int r_idx; int r_addend; 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; int len1; 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!! */ /* 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 { raw[7] = len_2; } if (output_section == &bfd_com_section || output_section == &bfd_abs_section || output_section == &bfd_und_section) { /* 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 += (short)((reloc->addend) & 0xffff); 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++; } } /* 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 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 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; } static bfd_byte * DEFUN(b_out_get_relocated_section_contents,(in_abfd, seclet, data), bfd *in_abfd AND bfd_seclet_type *seclet AND bfd_byte *data) { /* 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); /* 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); src_address+=4; dst_address+=4; break; case ABS32: bfd_put_32(in_abfd, 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); src_address+=4; dst_address+=4; 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); 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); word = (word & ~BAL_MASK) | (((word & BAL_MASK) + symbol->section->output_offset + symbol->section->output_section->vma+ symbol->value + reloc->addend - dst_address - ( input_section->output_section->vma + input_section->output_offset)) & 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); word = (word & ~PCREL13_MASK) | (((word & PCREL13_MASK) + symbol->section->output_offset + symbol->section->output_section->vma+ symbol->value + reloc->addend - dst_address - ( 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_true #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 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 */ ' ', /* ar_pad_char */ 16, /* ar_max_namelen */ 2, /* minumum alignment power */ _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */ _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _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), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */ b_out_reloc_type_lookup, }; 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 */ ' ', /* ar_pad_char */ 16, /* ar_max_namelen */ 2, /* minum align */ _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */ _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _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), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */ b_out_reloc_type_lookup, };