From 252b5132c753830d5fd56823373aed85f2a0db63 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 3 May 1999 07:29:11 +0000 Subject: 19990502 sourceware import --- bfd/aout-arm.c | 546 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 546 insertions(+) create mode 100644 bfd/aout-arm.c (limited to 'bfd/aout-arm.c') diff --git a/bfd/aout-arm.c b/bfd/aout-arm.c new file mode 100644 index 0000000000..beb900beaa --- /dev/null +++ b/bfd/aout-arm.c @@ -0,0 +1,546 @@ +/* BFD back-end for raw ARM a.out binaries. + Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) + +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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#define N_TXTADDR(x) \ + ((N_MAGIC(x) == NMAGIC) ? 0x8000 : \ + (N_MAGIC(x) != ZMAGIC) ? 0 : \ + (N_SHARED_LIB(x)) ? ((x).a_entry & ~(TARGET_PAGE_SIZE - 1)) : \ + TEXT_START_ADDR) + +#define TEXT_START_ADDR 0x8000 +#define TARGET_PAGE_SIZE 0x8000 +#define SEGMENT_SIZE TARGET_PAGE_SIZE +#define DEFAULT_ARCH bfd_arch_arm + +#define MY(OP) CAT(aoutarm_,OP) +#define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \ + (((x).a_info & ~006000) != OMAGIC) && \ + ((x).a_info != NMAGIC)) +#define N_MAGIC(x) ((x).a_info & ~07200) + +#include "bfd.h" +#include "sysdep.h" + +#define MYARM(OP) CAT(aoutarm_,OP) +reloc_howto_type *MYARM(bfd_reloc_type_lookup) + PARAMS((bfd *, bfd_reloc_code_real_type)); +static boolean MYARM(write_object_contents) PARAMS((bfd *)); + +/* Avoid multiple defininitions from aoutx if supporting standarad a.out + as well as our own. */ +#define NAME(x,y) CAT3(aoutarm,_32_,y) + +#define MY_bfd_reloc_type_lookup aoutarm_bfd_reloc_type_lookup + +#include "libaout.h" +#include "aout/aout64.h" + +static bfd_reloc_status_type +MY(fix_pcrel_26_done) PARAMS ((bfd *, arelent *, asymbol *, PTR, + asection *, bfd *, char **)); + +static bfd_reloc_status_type +MY(fix_pcrel_26) PARAMS ((bfd *, arelent *, asymbol *, PTR, + asection *, bfd *, char **)); +static void MY(swap_std_reloc_in) PARAMS ((bfd *, struct reloc_std_external *, + arelent *, asymbol **, + bfd_size_type)); +void MY(swap_std_reloc_out) PARAMS ((bfd *, arelent *, + struct reloc_std_external *)); + +reloc_howto_type MY(howto_table)[] = +{ + /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask + pcdone */ + HOWTO (0, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "8", true, + 0x000000ff, 0x000000ff, false), + HOWTO (1, 0, 1, 16, false, 0, complain_overflow_bitfield, 0, "16", true, + 0x0000ffff, 0x0000ffff, false), + HOWTO (2, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "32", true, + 0xffffffff, 0xffffffff, false), + HOWTO (3, 2, 2, 26, true, 0, complain_overflow_signed, MY(fix_pcrel_26), + "ARM26", true, 0x00ffffff, 0x00ffffff, true), + HOWTO (4, 0, 0, 8, true, 0, complain_overflow_signed, 0, "DISP8", true, + 0x000000ff, 0x000000ff, true), + HOWTO (5, 0, 1, 16, true, 0, complain_overflow_signed, 0, "DISP16", true, + 0x0000ffff, 0x0000ffff, true), + HOWTO (6, 0, 2, 32, true, 0, complain_overflow_signed, 0, "DISP32", true, + 0xffffffff, 0xffffffff, true), + HOWTO (7, 2, 2, 26, false, 0, complain_overflow_signed, + MY(fix_pcrel_26_done), "ARM26D", true, 0x0, 0x0, + false), + {-1}, + HOWTO (9, 0, -1, 16, false, 0, complain_overflow_bitfield, 0, "NEG16", true, + 0x0000ffff, 0x0000ffff, false), + HOWTO (10, 0, -2, 32, false, 0, complain_overflow_bitfield, 0, "NEG32", true, + 0xffffffff, 0xffffffff, false) +}; + +#define RELOC_ARM_BITS_NEG_BIG ((unsigned int) 0x08) +#define RELOC_ARM_BITS_NEG_LITTLE ((unsigned int) 0x10) + +reloc_howto_type * +MY(reloc_howto)(abfd, rel, r_index, r_extern, r_pcrel) + bfd *abfd; + struct reloc_std_external *rel; + int *r_index; + int *r_extern; + int *r_pcrel; +{ + unsigned int r_length; + unsigned int r_pcrel_done; + unsigned int r_neg; + int index; + + *r_pcrel = 0; + if (bfd_header_big_endian (abfd)) + { + *r_index = ((rel->r_index[0] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[2]); + *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); + r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); + r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_BIG)); + r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) + >> RELOC_STD_BITS_LENGTH_SH_BIG); + } + else + { + *r_index = ((rel->r_index[2] << 16) + | (rel->r_index[1] << 8) + | rel->r_index[0]); + *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); + r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); + r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_LITTLE)); + r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) + >> RELOC_STD_BITS_LENGTH_SH_LITTLE); + } + index = r_length + 4 * r_pcrel_done + 8 * r_neg; + if (index == 3) + *r_pcrel = 1; + + return MY(howto_table) + index; +} + +#define MY_reloc_howto(BFD, REL, IN, EX, PC) \ + MY(reloc_howto) (BFD, REL, &IN, &EX, &PC) + +void +MY(put_reloc)(abfd, r_extern, r_index, value, howto, reloc) + bfd *abfd; + int r_extern; + int r_index; + long value; + reloc_howto_type *howto; + struct reloc_std_external *reloc; +{ + unsigned int r_length; + int r_pcrel; + int r_neg; + + PUT_WORD (abfd, value, reloc->r_address); + r_length = howto->size ; /* Size as a power of two */ + + /* Special case for branch relocations. */ + if (howto->type == 3 || howto->type == 7) + r_length = 3; + + r_pcrel = howto->type & 4; /* PC Relative done? */ + r_neg = howto->type & 8; /* Negative relocation */ + if (bfd_header_big_endian (abfd)) + { + reloc->r_index[0] = r_index >> 16; + reloc->r_index[1] = r_index >> 8; + reloc->r_index[2] = r_index; + reloc->r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) + | (r_neg ? RELOC_ARM_BITS_NEG_BIG : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); + } + else + { + reloc->r_index[2] = r_index >> 16; + reloc->r_index[1] = r_index >> 8; + reloc->r_index[0] = r_index; + reloc->r_type[0] = + ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) + | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) + | (r_neg ? RELOC_ARM_BITS_NEG_LITTLE : 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); + } +} + +#define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \ + MY(put_reloc)(BFD, EXT, IDX, VAL, HOWTO, RELOC) + +void +MY(relocatable_reloc)(howto, abfd, reloc, amount, r_addr) + reloc_howto_type *howto; + bfd *abfd; + struct reloc_std_external *reloc; + bfd_vma *amount; + bfd_vma r_addr; +{ + if (howto->type == 3) + { + if (reloc->r_type[0] + & (bfd_header_big_endian (abfd) + ? RELOC_STD_BITS_EXTERN_BIG : RELOC_STD_BITS_EXTERN_LITTLE)) + { + /* The reloc is still external, so don't modify anything. */ + *amount = 0; + } + else + { + *amount -= r_addr; + /* Change the r_pcrel value -- on the ARM, this bit is set once the + relocation is done. */ + if (bfd_header_big_endian (abfd)) + reloc->r_type[0] |= RELOC_STD_BITS_PCREL_BIG; + else + reloc->r_type[0] |= RELOC_STD_BITS_PCREL_LITTLE; + } + } + else if (howto->type == 7) + *amount = 0; +} + +#define MY_relocatable_reloc(HOW, BFD, REL, AMOUNT, ADDR) \ + MY(relocatable_reloc)(HOW, BFD, REL, &(AMOUNT), ADDR) + +static bfd_reloc_status_type +MY(fix_pcrel_26_done) (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message; +{ + /* This is dead simple at present. */ + return bfd_reloc_ok; +} + +static bfd_reloc_status_type +MY(fix_pcrel_26) (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message; +{ + bfd_vma relocation; + bfd_size_type addr = reloc_entry->address; + long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); + bfd_reloc_status_type flag = bfd_reloc_ok; + + /* If this is an undefined symbol, return error */ + if (symbol->section == &bfd_und_section + && (symbol->flags & BSF_WEAK) == 0) + return output_bfd ? bfd_reloc_ok : bfd_reloc_undefined; + + /* If the sections are different, and we are doing a partial relocation, + just ignore it for now. */ + if (symbol->section->name != input_section->name + && output_bfd != (bfd *)NULL) + return bfd_reloc_ok; + + relocation = (target & 0x00ffffff) << 2; + relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ + relocation += symbol->value; + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + relocation -= input_section->output_section->vma; + relocation -= input_section->output_offset; + relocation -= addr; + if (relocation & 3) + return bfd_reloc_overflow; + + /* Check for overflow */ + if (relocation & 0x02000000) + { + if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) + flag = bfd_reloc_overflow; + } + else if (relocation & ~0x03ffffff) + flag = bfd_reloc_overflow; + + target &= ~0x00ffffff; + target |= (relocation >> 2) & 0x00ffffff; + bfd_put_32 (abfd, target, (bfd_byte *) data + addr); + + /* Now the ARM magic... Change the reloc type so that it is marked as done. + Strictly this is only necessary if we are doing a partial relocation. */ + reloc_entry->howto = &MY(howto_table)[7]; + + return flag; +} + +reloc_howto_type * +MY(bfd_reloc_type_lookup)(abfd,code) + bfd *abfd; + bfd_reloc_code_real_type code; +{ +#define ASTD(i,j) case i: return &MY(howto_table)[j] + if (code == BFD_RELOC_CTOR) + switch (bfd_get_arch_info (abfd)->bits_per_address) + { + case 32: + code = BFD_RELOC_32; + break; + default: return (CONST struct reloc_howto_struct *) 0; + } + + switch (code) + { + ASTD (BFD_RELOC_16, 1); + ASTD (BFD_RELOC_32, 2); + ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3); + ASTD (BFD_RELOC_8_PCREL, 4); + ASTD (BFD_RELOC_16_PCREL, 5); + ASTD (BFD_RELOC_32_PCREL, 6); + default: return (CONST struct reloc_howto_struct *) 0; + } +} + +#define MY_swap_std_reloc_in MY(swap_std_reloc_in) +#define MY_swap_std_reloc_out MY(swap_std_reloc_out) +#define MY_get_section_contents _bfd_generic_get_section_contents +/* #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create */ +/* #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols */ +/* #define MY_bfd_final_link _bfd_generic_final_link */ + +#include "aoutx.h" + +static void +MY_swap_std_reloc_in (abfd, bytes, cache_ptr, symbols, symcount) + bfd *abfd; + struct reloc_std_external *bytes; + arelent *cache_ptr; + asymbol **symbols; + bfd_size_type symcount; +{ + int r_index; + int r_extern; + int r_pcrel; + struct aoutdata *su = &(abfd->tdata.aout_data->a); + + cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address); + + cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel); + + MOVE_ADDRESS (0); +} + +void +MY_swap_std_reloc_out (abfd, g, natptr) + bfd *abfd; + arelent *g; + struct reloc_std_external *natptr; +{ + int r_index; + asymbol *sym = *(g->sym_ptr_ptr); + int r_extern; + int r_length; + int r_pcrel; + int r_neg = 0; /* Negative relocs use the BASEREL bit. */ + asection *output_section = sym->section->output_section; + + PUT_WORD(abfd, g->address, natptr->r_address); + + r_length = g->howto->size ; /* Size as a power of two */ + if (r_length < 0) + { + r_length = -r_length; + r_neg = 1; + } + + r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ + + /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the + relocation has been done already (Only for the 26-bit one I think)???!!! + */ + + if (g->howto->type == 3) + { + r_length = 3; + r_pcrel = 0; + } + else if (g->howto->type == 7) + { + r_length = 3; + r_pcrel = 1; + } + + +#if 0 + /* For a standard reloc, the addend is in the object file. */ + r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; +#endif + + /* name was clobbered by aout_write_syms to be symbol index */ + + /* If this relocation is relative to a symbol then set the + r_index to the symbols index, and the r_extern bit. + + Absolute symbols can come in in two ways, either as an offset + from the abs section, or as a symbol which has an abs value. + check for that here + */ + + 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_index = 0; + r_extern = 0; + } + else + { + /* Fill in symbol */ + r_extern = 1; + r_index = (*(g->sym_ptr_ptr))->KEEPIT; + } + } + else + { + /* Just an ordinary section */ + r_extern = 0; + r_index = output_section->target_index; + } + + /* now the fun stuff */ + if (bfd_header_big_endian (abfd)) + { + 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_neg ? RELOC_ARM_BITS_NEG_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_neg ? RELOC_ARM_BITS_NEG_LITTLE: 0) + | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); + } +} + +#define MY_BFD_TARGET + +#include "aout-target.h" + +const bfd_target aout_arm_little_vec = +{ + "a.out-arm-little", /* name */ + bfd_target_aout_flavour, + BFD_ENDIAN_LITTLE, /* target byte order (little) */ + BFD_ENDIAN_LITTLE, /* target headers byte order (little) */ + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), + MY_symbol_leading_char, + AR_PAD_CHAR, /* ar_pad_char */ + 15, /* ar_max_namelen */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getl32, bfd_getl_signed_32, bfd_putl32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ + bfd_getl64, bfd_getl_signed_64, bfd_putl64, + bfd_getl32, bfd_getl_signed_32, bfd_putl32, + bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ + {_bfd_dummy_target, MY_object_p, /* bfd_check_format */ + bfd_generic_archive_p, MY_core_file_p}, + {bfd_false, MY_mkobject, /* bfd_set_format */ + _bfd_generic_mkarchive, bfd_false}, + {bfd_false, MY_write_object_contents, /* bfd_write_contents */ + _bfd_write_archive_contents, bfd_false}, + + BFD_JUMP_TABLE_GENERIC (MY), + BFD_JUMP_TABLE_COPY (MY), + BFD_JUMP_TABLE_CORE (MY), + BFD_JUMP_TABLE_ARCHIVE (MY), + BFD_JUMP_TABLE_SYMBOLS (MY), + BFD_JUMP_TABLE_RELOCS (MY), + BFD_JUMP_TABLE_WRITE (MY), + BFD_JUMP_TABLE_LINK (MY), + BFD_JUMP_TABLE_DYNAMIC (MY), + + (PTR) MY_backend_data, +}; + +const bfd_target aout_arm_big_vec = +{ + "a.out-arm-big", /* name */ + bfd_target_aout_flavour, + BFD_ENDIAN_BIG, /* target byte order (big) */ + BFD_ENDIAN_BIG, /* target headers byte order (big) */ + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), + MY_symbol_leading_char, + AR_PAD_CHAR, /* ar_pad_char */ + 15, /* ar_max_namelen */ + bfd_getb64, bfd_getb_signed_64, bfd_putb64, + bfd_getb32, bfd_getb_signed_32, bfd_putb32, + bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ + bfd_getb64, bfd_getb_signed_64, bfd_putb64, + bfd_getb32, bfd_getb_signed_32, bfd_putb32, + bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ + {_bfd_dummy_target, MY_object_p, /* bfd_check_format */ + bfd_generic_archive_p, MY_core_file_p}, + {bfd_false, MY_mkobject, /* bfd_set_format */ + _bfd_generic_mkarchive, bfd_false}, + {bfd_false, MY_write_object_contents, /* bfd_write_contents */ + _bfd_write_archive_contents, bfd_false}, + + BFD_JUMP_TABLE_GENERIC (MY), + BFD_JUMP_TABLE_COPY (MY), + BFD_JUMP_TABLE_CORE (MY), + BFD_JUMP_TABLE_ARCHIVE (MY), + BFD_JUMP_TABLE_SYMBOLS (MY), + BFD_JUMP_TABLE_RELOCS (MY), + BFD_JUMP_TABLE_WRITE (MY), + BFD_JUMP_TABLE_LINK (MY), + BFD_JUMP_TABLE_DYNAMIC (MY), + + (PTR) MY_backend_data, +}; -- cgit v1.2.1