/* BFD semi-generic back-end for a.out binaries */ /* Copyright (C) 1990, 1991 Free Software Foundation, Inc. This file is part of BFD, the Binary File Diddler. BFD 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 1, or (at your option) any later version. BFD 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 BFD; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include "bfd.h" struct external_exec; #include "liba.out.h" #include "libbfd.h" #include "aout64.h" #include "stab.gnu.h" #include "ar.h" void (*bfd_error_trap)(); /*SUPPRESS558*/ /*SUPPRESS529*/ #define CTOR_TABLE_RELOC_IDX 2 static reloc_howto_type howto_table_ext[] = { HOWTO(RELOC_8, 0, 0, 8, false, 0, true, true,0,"8", false, 0,0x000000ff, false), HOWTO(RELOC_16, 0, 1, 16, false, 0, true, true,0,"16", false, 0,0x0000ffff, false), HOWTO(RELOC_32, 0, 2, 32, false, 0, true, true,0,"32", false, 0,0xffffffff, false), HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, false, true,0,"DISP8", false, 0,0x000000ff, false), HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, false, true,0,"DISP16", false, 0,0x0000ffff, false), HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, false, true,0,"DISP32", false, 0,0xffffffff, false), HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, false, true,0,"WDISP30", false, 0,0x3fffffff, false), HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, false, true,0,"WDISP22", false, 0,0x003fffff, false), HOWTO(RELOC_HI22, 10, 2, 22, false, 0, false, true,0,"HI22", false, 0,0x003fffff, false), HOWTO(RELOC_22, 0, 2, 22, false, 0, false, true,0,"22", false, 0,0x003fffff, false), HOWTO(RELOC_13, 0, 2, 13, false, 0, false, true,0,"13", false, 0,0x00001fff, false), HOWTO(RELOC_LO10, 0, 2, 10, false, 0, false, true,0,"LO10", false, 0,0x000003ff, false), HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, false, true,0,"SFA_BASE", false, 0,0xffffffff, false), HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, false, true,0,"SFA_OFF13",false, 0,0xffffffff, false), HOWTO(RELOC_BASE10, 0, 2, 16, false, 0, false, true,0,"BASE10", false, 0,0x0000ffff, false), HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, false, true,0,"BASE13", false, 0,0x00001fff, false), HOWTO(RELOC_BASE22, 0, 2, 0, false, 0, false, true,0,"BASE22", false, 0,0x00000000, false), HOWTO(RELOC_PC10, 0, 2, 10, false, 0, false, true,0,"PC10", false, 0,0x000003ff, false), HOWTO(RELOC_PC22, 0, 2, 22, false, 0, false, true,0,"PC22", false, 0,0x003fffff, false), HOWTO(RELOC_JMP_TBL,0, 2, 32, false, 0, false, true,0,"JMP_TBL", false, 0,0xffffffff, false), HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, false, true,0,"SEGOFF16", false, 0,0x00000000, false), HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, false, true,0,"GLOB_DAT", false, 0,0x00000000, false), HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, false, true,0,"JMP_SLOT", false, 0,0x00000000, false), HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, false, true,0,"RELATIVE", false, 0,0x00000000, false), HOWTO(RELOC_JUMPTARG,2, 13, 16, true, 0, false, true,0,"JUMPTARG", false, 0,0x0000ffff, false), HOWTO(RELOC_CONST, 0, 13, 16, false, 0, false, true,0,"CONST", false, 0,0x0000ffff, false), HOWTO(RELOC_CONSTH, 16, 13, 16, false, 0, false, true,0,"CONSTH", false, 0,0x0000ffff, false), }; /* Convert standard reloc records to "arelent" format (incl byte swap). */ static reloc_howto_type howto_table_std[] = { /* type rs size bsz pcrel bitpos abs ovrf sf name part_inpl readmask setmask pcdone */ HOWTO( 0, 0, 0, 8, false, 0, true, true,0,"8", true, 0x000000ff,0x000000ff, false), HOWTO( 1, 0, 1, 16, false, 0, true, true,0,"16", true, 0x0000ffff,0x0000ffff, false), HOWTO( 2, 0, 2, 32, false, 0, true, true,0,"32", true, 0xffffffff,0xffffffff, false), HOWTO( 3, 0, 3, 64, false, 0, true, true,0,"64", true, 0xdeaddead,0xdeaddead, false), HOWTO( 4, 0, 0, 8, true, 0, false, true,0,"DISP8", true, 0x000000ff,0x000000ff, false), HOWTO( 5, 0, 1, 16, true, 0, false, true,0,"DISP16", true, 0x0000ffff,0x0000ffff, false), HOWTO( 6, 0, 2, 32, true, 0, false, true,0,"DISP32", true, 0xffffffff,0xffffffff, false), HOWTO( 7, 0, 3, 64, true, 0, false, true,0,"DISP64", true, 0xfeedface,0xfeedface, false), }; bfd_error_vector_type bfd_error_vector; void DEFUN(NAME(aout,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); } void DEFUN(NAME(aout,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); } struct container { struct aoutdata a; struct internal_exec e; }; /* Some A.OUT variant thinks that the file whose format we're checking is an a.out file. Do some more checking, and set up for access if it really is. Call back to the calling environments "finish up" function just before returning, to handle any last-minute setup. */ bfd_target * DEFUN(NAME(aout,some_aout_object_p),(abfd, callback_to_real_object_p), bfd *abfd AND bfd_target *(*callback_to_real_object_p) ()) { struct external_exec exec_bytes; struct internal_exec *execp; struct container *rawptr; if (bfd_seek (abfd, 0L, false) < 0) { bfd_error = system_call_error; return 0; } if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) != EXEC_BYTES_SIZE) { bfd_error = wrong_format; return 0; } /* Use an intermediate variable for clarity */ rawptr = (struct container *) bfd_zalloc (abfd, sizeof (struct container)); if (rawptr == NULL) { bfd_error = no_memory; return 0; } set_tdata (abfd, rawptr); exec_hdr (abfd) = execp = &(rawptr->e); NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, execp); /* Set the file flags */ abfd->flags = NO_FLAGS; if (execp->a_drsize || execp->a_trsize) abfd->flags |= HAS_RELOC; if (execp->a_entry) abfd->flags |= EXEC_P; if (execp->a_syms) abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; if (N_MAGIC (*execp) == ZMAGIC) abfd->flags |= D_PAGED; if (N_MAGIC (*execp) == NMAGIC) abfd->flags |= WP_TEXT; bfd_get_start_address (abfd) = execp->a_entry; obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); /* Set the default architecture and machine type. These can be overridden in the callback routine. */ abfd->obj_arch = bfd_arch_unknown; abfd->obj_machine = 0; /* The default relocation entry size is that of traditional V7 Unix. */ obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; /* create the sections. This is raunchy, but bfd_close wants to reclaim them */ obj_textsec (abfd) = (asection *)NULL; obj_datasec (abfd) = (asection *)NULL; obj_bsssec (abfd) = (asection *)NULL; (void)bfd_make_section(abfd, ".text"); (void)bfd_make_section(abfd, ".data"); (void)bfd_make_section(abfd, ".bss"); abfd->sections = obj_textsec (abfd); obj_textsec (abfd)->next = obj_datasec (abfd); obj_datasec (abfd)->next = obj_bsssec (abfd); obj_datasec (abfd)->size = execp->a_data; obj_bsssec (abfd)->size = execp->a_bss; obj_textsec (abfd)->size = execp->a_text; if (abfd->flags & D_PAGED) { obj_textsec (abfd)->size -= EXEC_BYTES_SIZE; } obj_textsec (abfd)->flags = (execp->a_trsize != 0 ? (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) : (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS)); obj_datasec (abfd)->flags = (execp->a_drsize != 0 ? (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) : (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS)); obj_bsssec (abfd)->flags = SEC_ALLOC; #ifdef THIS_IS_ONLY_DOCUMENTATION /* Call back to the format-dependent code to fill in the rest of the fields and do any further cleanup. Things that should be filled in by the callback: */ struct exec *execp = exec_hdr (abfd); /* The virtual memory addresses of the sections */ obj_datasec (abfd)->vma = N_DATADDR(*execp); obj_bsssec (abfd)->vma = N_BSSADDR(*execp); obj_textsec (abfd)->vma = N_TXTADDR(*execp); /* The file offsets of the sections */ obj_textsec (abfd)->filepos = N_TXTOFF(*execp); obj_datasec (abfd)->filepos = N_DATOFF(*execp); /* The file offsets of the relocation info */ obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); /* The file offsets of the string table and symbol table. */ obj_str_filepos (abfd) = N_STROFF (*execp); obj_sym_filepos (abfd) = N_SYMOFF (*execp); /* This common code can't fill in those things because they depend on either the start address of the text segment, the rounding up of virtual addersses between segments, or the starting file position of the text segment -- all of which varies among different versions of a.out. */ /* Determine the architecture and machine type of the object file. */ switch (N_MACHTYPE (*exec_hdr (abfd))) { default: abfd->obj_arch = bfd_arch_obscure; break; } /* Determine the size of a relocation entry */ switch (abfd->obj_arch) { case bfd_arch_sparc: case bfd_arch_a29k: obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; default: obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; } return abfd->xvec; /* The architecture is encoded in various ways in various a.out variants, or is not encoded at all in some of them. The relocation size depends on the architecture and the a.out variant. Finally, the return value is the bfd_target vector in use. If an error occurs, return zero and set bfd_error to the appropriate error code. Formats such as b.out, which have additional fields in the a.out header, should cope with them in this callback as well. */ #endif /* DOCUMENTATION */ return (*callback_to_real_object_p)(abfd); } boolean DEFUN(NAME(aout,mkobject),(abfd), bfd *abfd) { struct container *rawptr; bfd_error = system_call_error; /* Use an intermediate variable for clarity */ rawptr = (struct container *)bfd_zalloc (abfd, sizeof (struct container)); if (rawptr == NULL) { bfd_error = no_memory; return false; } set_tdata (abfd, 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; } /* Keep track of machine architecture and machine type for a.out's. Return the machine_type for a particular arch&machine, or M_UNKNOWN if that exact arch&machine can't be represented in a.out format. If the architecture is understood, machine type 0 (default) should always be understood. */ enum machine_type DEFUN(NAME(aout,machine_type),(arch, machine), enum bfd_architecture arch AND unsigned long machine) { enum machine_type arch_flags; arch_flags = M_UNKNOWN; switch (arch) { case bfd_arch_sparc: if (machine == 0) arch_flags = M_SPARC; break; case bfd_arch_m68k: switch (machine) { case 0: arch_flags = M_68010; break; case 68000: arch_flags = M_UNKNOWN; break; case 68010: arch_flags = M_68010; break; case 68020: arch_flags = M_68020; break; default: arch_flags = M_UNKNOWN; break; } break; case bfd_arch_i386: if (machine == 0) arch_flags = M_386; break; case bfd_arch_a29k: if (machine == 0) arch_flags = M_29K; break; default: arch_flags = M_UNKNOWN; break; } return arch_flags; } boolean DEFUN(NAME(aout,set_arch_mach),(abfd, arch, machine), bfd *abfd AND enum bfd_architecture arch AND unsigned long machine) { abfd->obj_arch = arch; abfd->obj_machine = machine; if (arch != bfd_arch_unknown && NAME(aout,machine_type) (arch, machine) == M_UNKNOWN) return false; /* We can't represent this type */ return true; /* We're easy ... */ } /* exec and core file sections */ boolean DEFUN(NAME(aout,new_section_hook),(abfd, newsect), bfd *abfd AND asection *newsect) { /* align to double at least */ newsect->alignment_power = 3; if (bfd_get_format (abfd) == bfd_object) { if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) { obj_textsec(abfd)= newsect; return true; } if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) { obj_datasec(abfd) = newsect; return true; } if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) { obj_bsssec(abfd) = newsect; return true; } } /* We allow more than three sections internally */ return true; } boolean DEFUN(NAME(aout,set_section_contents),(abfd, section, location, offset, count), bfd *abfd AND sec_ptr section AND PTR location AND file_ptr offset AND bfd_size_type count) { if (abfd->output_has_begun == false) { /* set by bfd.c handler */ if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL)) { bfd_error = invalid_operation; return false; } /* if (abfd->flags & D_PAGED) { obj_textsec(abfd)->filepos = 0; } else*/ { obj_textsec(abfd)->filepos = EXEC_BYTES_SIZE; } obj_textsec(abfd)->size = align_power(obj_textsec(abfd)->size, obj_textsec(abfd)->alignment_power); obj_datasec(abfd)->filepos = obj_textsec (abfd)->size + EXEC_BYTES_SIZE; obj_datasec(abfd)->size = align_power(obj_datasec(abfd)->size, obj_datasec(abfd)->alignment_power); } /* regardless, once we know what we're doing, we might as well get going */ if (section != obj_bsssec(abfd)) { bfd_seek (abfd, section->filepos + offset, SEEK_SET); if (count) { return (bfd_write ((PTR)location, 1, count, abfd) == count) ? true : false; } return false; } return true; } /* Classify stabs symbols */ #define sym_in_text_section(sym) \ (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_TEXT) #define sym_in_data_section(sym) \ (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_DATA) #define sym_in_bss_section(sym) \ (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_BSS) /* Symbol is undefined if type is N_UNDF|N_EXT and if it has zero in the "value" field. Nonzeroes there are fortrancommon symbols. */ #define sym_is_undefined(sym) \ ((sym)->type == (N_UNDF | N_EXT) && (sym)->symbol.value == 0) /* Symbol is a global definition if N_EXT is on and if it has a nonzero type field. */ #define sym_is_global_defn(sym) \ (((sym)->type & N_EXT) && (sym)->type & N_TYPE) /* Symbol is debugger info if any bits outside N_TYPE or N_EXT are on. */ #define sym_is_debugger_info(sym) \ ((sym)->type & ~(N_EXT | N_TYPE)) #define sym_is_fortrancommon(sym) \ (((sym)->type == (N_EXT)) && (sym)->symbol.value != 0) /* Symbol is absolute if it has N_ABS set */ #define sym_is_absolute(sym) \ (((sym)->type & N_TYPE)== N_ABS) #define sym_is_indirect(sym) \ (((sym)->type & N_ABS)== N_ABS) /* Only in their own functions for ease of debugging; when sym flags have stabilised these should be inlined into their (single) caller */ static void DEFUN(translate_from_native_sym_flags,(sym_pointer, cache_ptr, abfd), struct external_nlist *sym_pointer AND aout_symbol_type *cache_ptr AND bfd *abfd) { switch (cache_ptr->type & N_TYPE) { case N_SETA: case N_SETT: case N_SETD: case N_SETB: { asection *section = bfd_make_section(abfd, cache_ptr->symbol.name); arelent_chain *reloc = (arelent_chain *)bfd_alloc(abfd, sizeof(arelent_chain)); switch ( (cache_ptr->type & N_TYPE) ) { case N_SETA: reloc->relent.section = (asection *)NULL; cache_ptr->symbol.section = (asection *)NULL; break; case N_SETT: reloc->relent.section = (asection *)obj_textsec(abfd); cache_ptr->symbol.value -= reloc->relent.section->vma; break; case N_SETD: reloc->relent.section = (asection *)obj_datasec(abfd); cache_ptr->symbol.value -= reloc->relent.section->vma; break; case N_SETB: reloc->relent.section = (asection *)obj_bsssec(abfd); cache_ptr->symbol.value -= reloc->relent.section->vma; break; } cache_ptr->symbol.section = reloc->relent.section; reloc->relent.addend = cache_ptr->symbol.value ; /* We modify the symbol to belong to a section depending upon the name of the symbol - probably __CTOR__ or __DTOR__ but we don't really care, and add to the size of the section to contain a pointer to the symbol. Build a reloc entry to relocate to this symbol attached to this section. */ section->flags = SEC_CONSTRUCTOR; section->reloc_count++; section->alignment_power = 2; reloc->relent.sym_ptr_ptr = (asymbol **)NULL; reloc->next = section->constructor_chain; section->constructor_chain = reloc; reloc->relent.address = section->size; section->size += sizeof(int *); reloc->relent.howto = howto_table_ext +CTOR_TABLE_RELOC_IDX; cache_ptr->symbol.flags |= BSF_DEBUGGING ; } break; default: if (sym_is_debugger_info (cache_ptr)) { cache_ptr->symbol.flags = BSF_DEBUGGING ; /* Work out the section correct for this symbol */ switch (cache_ptr->type & N_TYPE) { case N_TEXT: case N_FN: cache_ptr->symbol.section = obj_textsec (abfd); cache_ptr->symbol.value -= obj_textsec(abfd)->vma; break; case N_DATA: cache_ptr->symbol.value -= obj_datasec(abfd)->vma; cache_ptr->symbol.section = obj_datasec (abfd); break; case N_BSS : cache_ptr->symbol.section = obj_bsssec (abfd); cache_ptr->symbol.value -= obj_bsssec(abfd)->vma; break; case N_ABS: default: cache_ptr->symbol.section = 0; break; } } else { if (sym_is_fortrancommon (cache_ptr)) { cache_ptr->symbol.flags = BSF_FORT_COMM; cache_ptr->symbol.section = (asection *)NULL; } else { if (sym_is_undefined (cache_ptr)) { cache_ptr->symbol.flags = BSF_UNDEFINED; } else if (sym_is_global_defn (cache_ptr)) { cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT; } else if (sym_is_absolute (cache_ptr)) { cache_ptr->symbol.flags = BSF_ABSOLUTE; } else { cache_ptr->symbol.flags = BSF_LOCAL; } /* In a.out, the value of a symbol is always relative to the * start of the file, if this is a data symbol we'll subtract * the size of the text section to get the section relative * value. If this is a bss symbol (which would be strange) * we'll subtract the size of the previous two sections * to find the section relative address. */ if (sym_in_text_section (cache_ptr)) { cache_ptr->symbol.value -= obj_textsec(abfd)->vma; cache_ptr->symbol.section = obj_textsec (abfd); } else if (sym_in_data_section (cache_ptr)){ cache_ptr->symbol.value -= obj_datasec(abfd)->vma; cache_ptr->symbol.section = obj_datasec (abfd); } else if (sym_in_bss_section(cache_ptr)) { cache_ptr->symbol.section = obj_bsssec (abfd); cache_ptr->symbol.value -= obj_bsssec(abfd)->vma; } else { cache_ptr->symbol.section = (asection *)NULL; cache_ptr->symbol.flags |= BSF_ABSOLUTE; } } } } } static void DEFUN(translate_to_native_sym_flags,(sym_pointer, cache_ptr, abfd), struct external_nlist *sym_pointer AND asymbol *cache_ptr AND bfd *abfd) { bfd_vma value = cache_ptr->value; if (bfd_get_section(cache_ptr)) { if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) { sym_pointer->e_type[0] |= N_BSS; } else if (bfd_get_output_section(cache_ptr) == obj_datasec (abfd)) { sym_pointer->e_type[0] |= N_DATA; } else if (bfd_get_output_section(cache_ptr) == obj_textsec (abfd)) { sym_pointer->e_type[0] |= N_TEXT; } else { bfd_error_vector.nonrepresentable_section(abfd, bfd_get_output_section(cache_ptr)->name); } /* Turn the symbol from section relative to absolute again */ value += cache_ptr->section->output_section->vma + cache_ptr->section->output_offset ; } else { sym_pointer->e_type[0] |= N_ABS; } if (cache_ptr->flags & (BSF_FORT_COMM | BSF_UNDEFINED)) { sym_pointer->e_type[0] = (N_UNDF | N_EXT); } else { if (cache_ptr->flags & BSF_ABSOLUTE) { sym_pointer->e_type[0] |= N_ABS; } if (cache_ptr->flags & (BSF_GLOBAL | BSF_EXPORT)) { sym_pointer->e_type[0] |= N_EXT; } if (cache_ptr->flags & BSF_DEBUGGING) { sym_pointer->e_type [0]= ((aout_symbol_type *)cache_ptr)->type; } } PUT_WORD(abfd, value, sym_pointer->e_value); } /* Native-level interface to symbols. */ /* We read the symbols into a buffer, which is discarded when this function exits. We read the strings into a buffer large enough to hold them all plus all the cached symbol entries. */ asymbol * DEFUN(NAME(aout,make_empty_symbol),(abfd), bfd *abfd) { aout_symbol_type *new = (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type)); new->symbol.the_bfd = abfd; return &new->symbol; } boolean DEFUN(NAME(aout,slurp_symbol_table),(abfd), bfd *abfd) { bfd_size_type symbol_size; bfd_size_type string_size; unsigned char string_chars[BYTES_IN_WORD]; struct external_nlist *syms; char *strings; aout_symbol_type *cached; /* If there's no work to be done, don't do any */ if (obj_aout_symbols (abfd) != (aout_symbol_type *)NULL) return true; symbol_size = exec_hdr(abfd)->a_syms; if (symbol_size == 0) { bfd_error = no_symbols; return false; } bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET); if (bfd_read ((PTR)string_chars, BYTES_IN_WORD, 1, abfd) != BYTES_IN_WORD) return false; string_size = GET_WORD (abfd, string_chars); strings =(char *) bfd_alloc(abfd, string_size + 1); cached = (aout_symbol_type *) bfd_zalloc(abfd, (bfd_size_type)(bfd_get_symcount (abfd) * sizeof(aout_symbol_type))); /* Alloc this last, so we can free it if obstack is in use. */ syms = (struct external_nlist *) bfd_alloc(abfd, symbol_size); bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET); if (bfd_read ((PTR)syms, 1, symbol_size, abfd) != symbol_size) { bailout: if (syms) bfd_release (abfd, syms); if (cached) bfd_release (abfd, cached); if (strings)bfd_release (abfd, strings); return false; } bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET); if (bfd_read ((PTR)strings, 1, string_size, abfd) != string_size) { goto bailout; } /* OK, now walk the new symtable, cacheing symbol properties */ { register struct external_nlist *sym_pointer; register struct external_nlist *sym_end = syms + bfd_get_symcount (abfd); register aout_symbol_type *cache_ptr = cached; /* Run through table and copy values */ for (sym_pointer = syms, cache_ptr = cached; sym_pointer < sym_end; sym_pointer++, cache_ptr++) { bfd_vma x = GET_WORD(abfd, sym_pointer->e_strx); cache_ptr->symbol.the_bfd = abfd; if (x) cache_ptr->symbol.name = x + strings; else cache_ptr->symbol.name = (char *)NULL; cache_ptr->symbol.value = GET_SWORD(abfd, sym_pointer->e_value); cache_ptr->desc = bfd_get_16(abfd, sym_pointer->e_desc); cache_ptr->other =bfd_get_8(abfd, sym_pointer->e_other); cache_ptr->type = bfd_get_8(abfd, sym_pointer->e_type); cache_ptr->symbol.udata = 0; translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd); } } obj_aout_symbols (abfd) = cached; bfd_release (abfd, (PTR)syms); return true; } void DEFUN(NAME(aout,write_syms),(abfd), bfd *abfd) { unsigned int count ; asymbol **generic = bfd_get_outsymbols (abfd); bfd_size_type stindex = BYTES_IN_WORD; /* initial string length */ for (count = 0; count < bfd_get_symcount (abfd); count++) { asymbol *g = generic[count]; struct external_nlist nsp; if (g->name) { unsigned int length = strlen(g->name) +1; PUT_WORD (abfd, stindex, (unsigned char *)nsp.e_strx); stindex += length; } else { PUT_WORD (abfd, 0, (unsigned char *)nsp.e_strx); } if (g->the_bfd->xvec->flavour == abfd->xvec->flavour) { bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc); bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other); bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type); } else { bfd_h_put_16(abfd,0, nsp.e_desc); bfd_h_put_8(abfd, 0, nsp.e_other); bfd_h_put_8(abfd, 0, nsp.e_type); } translate_to_native_sym_flags (&nsp, (PTR)g, abfd); bfd_write((PTR)&nsp,1,EXTERNAL_LIST_SIZE, abfd); } /* Now output the strings. Be sure to put string length into correct * byte ordering before writing it. */ { char buffer[BYTES_IN_WORD]; PUT_WORD (abfd, stindex, (unsigned char *)buffer); bfd_write((PTR)buffer, 1, BYTES_IN_WORD, abfd); } generic = bfd_get_outsymbols(abfd); for (count = 0; count < bfd_get_symcount(abfd); count++) { asymbol *g = *(generic++); if (g->name) { size_t length = strlen(g->name)+1; bfd_write((PTR)g->name, 1, length, abfd); } if ((g->flags & BSF_FAKE)==0) { g->name = itos(count); /* smash the generic symbol */ } } } unsigned int DEFUN(NAME(aout,get_symtab),(abfd, location), bfd *abfd AND asymbol **location) { unsigned int counter = 0; aout_symbol_type *symbase; if (!NAME(aout,slurp_symbol_table)(abfd)) return 0; for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);) *(location++) = (asymbol *)( symbase++); *location++ =0; return bfd_get_symcount(abfd); } /* Standard reloc stuff */ /* Output standard relocation information to a file in target byte order. */ void DEFUN(NAME(aout,swap_std_reloc_out),(abfd, g, natptr), bfd *abfd AND arelent *g AND struct reloc_std_external *natptr) { int r_index; int r_extern; unsigned int r_length; int r_pcrel; int r_baserel, r_jmptable, r_relative; unsigned int r_addend; PUT_WORD(abfd, g->address, natptr->r_address); r_length = g->howto->size ; /* Size as a power of two */ r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ /* r_baserel, r_jmptable, r_relative??? FIXME-soon */ r_baserel = 0; r_jmptable = 0; r_relative = 0; r_addend = g->addend; /* Start here, see how it goes */ /* name was clobbered by aout_write_syms to be symbol index */ if (g->sym_ptr_ptr != NULL) { if ((*(g->sym_ptr_ptr))->section) { /* put the section offset into the addend for output */ r_addend += (*(g->sym_ptr_ptr))->section->vma; } r_index = stoi((*(g->sym_ptr_ptr))->name); r_extern = 1; } else { r_extern = 0; if (g->section == NULL) { /* It is possible to have a reloc with nothing, we generate an abs + 0 */ r_addend = 0; r_index = N_ABS | N_EXT; } else if(g->section->output_section == obj_textsec(abfd)) { r_index = N_TEXT | N_EXT; r_addend += g->section->output_section->vma; } else if (g->section->output_section == obj_datasec(abfd)) { r_index = N_DATA | N_EXT; r_addend += g->section->output_section->vma; } else if (g->section->output_section == obj_bsssec(abfd)) { r_index = N_BSS | N_EXT ; r_addend += g->section->output_section->vma; } else { BFD_ASSERT(0); } } /* now the fun stuff */ if (abfd->xvec->header_byteorder_big_p != false) { natptr->r_index[0] = r_index >> 16; natptr->r_index[1] = r_index >> 8; natptr->r_index[2] = r_index; natptr->r_type[0] = (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0) | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0) | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0) | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0) | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0) | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG); } else { natptr->r_index[2] = r_index >> 16; natptr->r_index[1] = r_index >> 8; natptr->r_index[0] = r_index; natptr->r_type[0] = (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0) | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0) | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0) | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE); } } /* Extended stuff */ /* Output extended relocation information to a file in target byte order. */ void DEFUN(NAME(aout,swap_ext_reloc_out),(abfd, g, natptr), bfd *abfd AND arelent *g AND register struct reloc_ext_external *natptr) { int r_index; int r_extern; unsigned int r_type; unsigned int r_addend; PUT_WORD (abfd, g->address, natptr->r_address); /* Find a type in the output format which matches the input howto - at the moment we assume input format == output format FIXME!! */ r_type = (enum reloc_type) g->howto->type; r_addend = g->addend; /* Start here, see how it goes */ /* name was clobbered by aout_write_syms to be symbol index*/ if (g->sym_ptr_ptr != NULL) { if ((*(g->sym_ptr_ptr))->section) { /* put the section offset into the addend for output */ r_addend += (*(g->sym_ptr_ptr))->section->vma; } r_index = stoi((*(g->sym_ptr_ptr))->name); r_extern = 1; } else { r_extern = 0; if (g->section == NULL) { BFD_ASSERT(0); r_index = N_ABS | N_EXT; } else if(g->section->output_section == obj_textsec(abfd)) { r_index = N_TEXT | N_EXT; r_addend += g->section->output_section->vma; } else if (g->section->output_section == obj_datasec(abfd)) { r_index = N_DATA | N_EXT; r_addend += g->section->output_section->vma; } else if (g->section->output_section == obj_bsssec(abfd)) { r_index = N_BSS | N_EXT ; r_addend += g->section->output_section->vma; } else { BFD_ASSERT(0); } } /* now the fun stuff */ if (abfd->xvec->header_byteorder_big_p != false) { natptr->r_index[0] = r_index >> 16; natptr->r_index[1] = r_index >> 8; natptr->r_index[2] = r_index; natptr->r_type[0] = (r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0) | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG); } else { natptr->r_index[2] = r_index >> 16; natptr->r_index[1] = r_index >> 8; natptr->r_index[0] = r_index; natptr->r_type[0] = (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0) | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); } PUT_WORD (abfd, r_addend, natptr->r_addend); } #define MOVE_ADDRESS(ad) \ if (r_extern) { \ cache_ptr->sym_ptr_ptr = symbols + r_index; \ cache_ptr->section = (asection *)NULL; \ cache_ptr->addend = ad; \ } else { \ cache_ptr->sym_ptr_ptr = (asymbol **)NULL; \ switch (r_index) { \ case N_TEXT: \ case N_TEXT | N_EXT: \ cache_ptr->section = obj_textsec(abfd); \ cache_ptr->addend = ad - su->textsec->vma; \ break; \ case N_DATA: \ case N_DATA | N_EXT: \ cache_ptr->section = obj_datasec(abfd); \ cache_ptr->addend = ad - su->datasec->vma; \ break; \ case N_BSS: \ case N_BSS | N_EXT: \ cache_ptr->section = obj_bsssec(abfd); \ cache_ptr->addend = ad - su->bsssec->vma; \ break; \ case N_ABS: \ case N_ABS | N_EXT: \ cache_ptr->section = NULL; /* No section */ \ cache_ptr->addend = ad; /* FIXME, is this right? */ \ BFD_ASSERT(1); \ break; \ default: \ cache_ptr->section = NULL; /* No section */ \ cache_ptr->addend = ad; /* FIXME, is this right? */ \ BFD_ASSERT(1); \ break; \ } \ } \ void DEFUN(NAME(aout,swap_ext_reloc_in), (abfd, bytes, cache_ptr, symbols), bfd *abfd AND struct reloc_ext_external *bytes AND arelent *cache_ptr AND asymbol **symbols) { int r_index; int r_extern; unsigned int r_type; struct aoutdata *su = (struct aoutdata *)(abfd->tdata); cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); /* now the fun stuff */ if (abfd->xvec->header_byteorder_big_p != false) { r_index = (bytes->r_index[0] << 16) | (bytes->r_index[1] << 8) | bytes->r_index[2]; r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) >> RELOC_EXT_BITS_TYPE_SH_BIG; } else { r_index = (bytes->r_index[2] << 16) | (bytes->r_index[1] << 8) | bytes->r_index[0]; r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) >> RELOC_EXT_BITS_TYPE_SH_LITTLE; } cache_ptr->howto = howto_table_ext + r_type; MOVE_ADDRESS(GET_SWORD(abfd,bytes->r_addend)); } void DEFUN(NAME(aout,swap_std_reloc_in), (abfd, bytes, cache_ptr, symbols), bfd *abfd AND struct reloc_std_external *bytes AND arelent *cache_ptr AND asymbol **symbols) { int r_index; int r_extern; unsigned int r_length; int r_pcrel; int r_baserel, r_jmptable, r_relative; struct aoutdata *su = (struct aoutdata *)(abfd->tdata); cache_ptr->address = (int32_type)(bfd_h_get_32 (abfd, bytes->r_address)); /* now the fun stuff */ if (abfd->xvec->header_byteorder_big_p != false) { r_index = (bytes->r_index[0] << 16) | (bytes->r_index[1] << 8) | bytes->r_index[2]; r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) >> RELOC_STD_BITS_LENGTH_SH_BIG; } else { r_index = (bytes->r_index[2] << 16) | (bytes->r_index[1] << 8) | bytes->r_index[0]; r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) >> RELOC_STD_BITS_LENGTH_SH_LITTLE; } cache_ptr->howto = howto_table_std + r_length + 4 * r_pcrel; /* FIXME-soon: Roll baserel, jmptable, relative bits into howto setting */ MOVE_ADDRESS(0); } /* Reloc hackery */ boolean DEFUN(NAME(aout,slurp_reloc_table),(abfd, asect, symbols), bfd *abfd AND sec_ptr asect AND asymbol **symbols) { unsigned int count; bfd_size_type reloc_size; PTR relocs; arelent *reloc_cache; size_t each_size; if (asect->relocation) return true; if (asect->flags & SEC_CONSTRUCTOR) return true; 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, asect->rel_filepos, SEEK_SET); each_size = obj_reloc_entry_size (abfd); count = reloc_size / each_size; reloc_cache = (arelent *) bfd_zalloc (abfd, (size_t)(count * sizeof (arelent))); if (!reloc_cache) { nomem: bfd_error = no_memory; return false; } relocs = (PTR) bfd_alloc (abfd, reloc_size); if (!relocs) { bfd_release (abfd, reloc_cache); goto nomem; } if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) { bfd_release (abfd, relocs); bfd_release (abfd, reloc_cache); bfd_error = system_call_error; return false; } if (each_size == RELOC_EXT_SIZE) { register struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs; unsigned int counter = 0; arelent *cache_ptr = reloc_cache; for (; counter < count; counter++, rptr++, cache_ptr++) { NAME(aout,swap_ext_reloc_in)(abfd, rptr, cache_ptr, symbols); } } else { register struct reloc_std_external *rptr = (struct reloc_std_external*) relocs; unsigned int counter = 0; arelent *cache_ptr = reloc_cache; for (; counter < count; counter++, rptr++, cache_ptr++) { NAME(aout,swap_std_reloc_in)(abfd, rptr, cache_ptr, symbols); } } bfd_release (abfd,relocs); asect->relocation = reloc_cache; asect->reloc_count = count; return true; } /* Write out a relocation section into an object file. */ boolean DEFUN(NAME(aout,squirt_out_relocs),(abfd, section), bfd *abfd AND asection *section) { arelent **generic; unsigned char *native, *natptr; size_t each_size; unsigned int count = section->reloc_count; size_t natsize; if (count == 0) return true; each_size = obj_reloc_entry_size (abfd); natsize = each_size * count; native = (unsigned char *) bfd_zalloc (abfd, natsize); if (!native) { bfd_error = no_memory; return false; } generic = section->orelocation; if (each_size == RELOC_EXT_SIZE) { for (natptr = native; count != 0; --count, natptr += each_size, ++generic) NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr); } else { for (natptr = native; count != 0; --count, natptr += each_size, ++generic) NAME(aout,swap_std_reloc_out)(abfd, *generic, (struct reloc_std_external *)natptr); } if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { bfd_release(abfd, native); return false; } bfd_release (abfd, native); return true; } /* This is stupid. This function should be a boolean predicate */ unsigned int DEFUN(NAME(aout,canonicalize_reloc),(abfd, section, relptr, symbols), bfd *abfd AND sec_ptr section AND arelent **relptr AND asymbol **symbols) { arelent *tblptr = section->relocation; unsigned int count; if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols))) return 0; if (section->flags & SEC_CONSTRUCTOR) { arelent_chain *chain = section->constructor_chain; for (count = 0; count < section->reloc_count; count ++) { *relptr ++ = &chain->relent; chain = chain->next; } } else { tblptr = section->relocation; if (!tblptr) return 0; for (count = 0; count++ < section->reloc_count;) { *relptr++ = tblptr++; } } *relptr = 0; return section->reloc_count; } unsigned int DEFUN(NAME(aout,get_reloc_upper_bound),(abfd, asect), bfd *abfd AND sec_ptr asect) { if (bfd_get_format (abfd) != bfd_object) { bfd_error = invalid_operation; return 0; } if (asect->flags & SEC_CONSTRUCTOR) { return (sizeof (arelent *) * (asect->reloc_count+1)); } if (asect == obj_datasec (abfd)) return (sizeof (arelent *) * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd)) +1)); if (asect == obj_textsec (abfd)) return (sizeof (arelent *) * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd)) +1)); bfd_error = invalid_operation; return 0; } unsigned int DEFUN(NAME(aout,get_symtab_upper_bound),(abfd), bfd *abfd) { if (!NAME(aout,slurp_symbol_table)(abfd)) return 0; return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); } alent * DEFUN(NAME(aout,get_lineno),(ignore_abfd, ignore_symbol), bfd *ignore_abfd AND asymbol *ignore_symbol) { return (alent *)NULL; } void DEFUN(NAME(aout,print_symbol),(ignore_abfd, afile, symbol, how), bfd *ignore_abfd AND PTR afile AND asymbol *symbol AND bfd_print_symbol_enum_type how) { FILE *file = (FILE *)afile; switch (how) { case bfd_print_symbol_name_enum: fprintf(file,"%s", symbol->name); break; case bfd_print_symbol_type_enum: fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff), (unsigned)(aout_symbol(symbol)->other & 0xff), (unsigned)(aout_symbol(symbol)->type)); break; case bfd_print_symbol_all_enum: { CONST char *section_name = symbol->section == (asection *)NULL ? "*abs" : symbol->section->name; bfd_print_symbol_vandf((PTR)file,symbol); fprintf(file," %-5s %04x %02x %02x %s", section_name, (unsigned)(aout_symbol(symbol)->desc & 0xffff), (unsigned)(aout_symbol(symbol)->other & 0xff), (unsigned)(aout_symbol(symbol)->type & 0xff), symbol->name); } break; } } /* provided a bfd, a section and an offset into the section, calculate and return the name of the source file and the line nearest to the wanted location. */ boolean DEFUN(NAME(aout,find_nearest_line),(abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr), bfd *abfd AND asection *section AND asymbol **symbols AND bfd_vma offset AND CONST char **filename_ptr AND CONST char **functionname_ptr AND unsigned int *line_ptr) { /* Run down the file looking for the filename, function and linenumber */ asymbol **p; static char buffer[100]; bfd_vma high_line_vma = ~0; bfd_vma low_func_vma = 0; asymbol *func = 0; *filename_ptr = abfd->filename; *functionname_ptr = 0; *line_ptr = 0; if (symbols != (asymbol **)NULL) { for (p = symbols; *p; p++) { aout_symbol_type *q = (aout_symbol_type *)(*p); switch (q->type){ case N_SO: *filename_ptr = q->symbol.name; if (obj_textsec(abfd) != section) { return true; } break; case N_SLINE: case N_DSLINE: case N_BSLINE: /* We'll keep this if it resolves nearer than the one we have already */ if (q->symbol.value >= offset && q->symbol.value < high_line_vma) { *line_ptr = q->desc; high_line_vma = q->symbol.value; } break; case N_FUN: { /* We'll keep this if it is nearer than the one we have already */ if (q->symbol.value >= low_func_vma && q->symbol.value <= offset) { low_func_vma = q->symbol.value; func = (asymbol *)q; } if (*line_ptr && func) { CONST char *function = func->name; char *p; strncpy(buffer, function, sizeof(buffer)-1); buffer[sizeof(buffer)-1] = 0; /* Have to remove : stuff */ p = strchr(buffer,':'); if (p != NULL) {*p = NULL; } *functionname_ptr = buffer; return true; } } break; } } } return true; } int DEFUN(NAME(aout,sizeof_headers),(ignore_abfd, execable), bfd *ignore_abfd AND boolean execable) { return EXEC_BYTES_SIZE; }