246 lines
7.2 KiB
C
246 lines
7.2 KiB
C
/* SuperH SH64-specific support for 32-bit ELF
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Copyright (C) 2000-2015 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#define SH64_ELF
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/sh.h"
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#include "elf32-sh64.h"
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#include "../opcodes/sh64-opc.h"
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static bfd_boolean sh64_address_in_cranges
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(asection *cranges, bfd_vma, sh64_elf_crange *);
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/* Ordering functions of a crange, for the qsort and bsearch calls and for
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different endianness. */
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int
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_bfd_sh64_crange_qsort_cmpb (const void *p1, const void *p2)
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{
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bfd_vma a1 = bfd_getb32 (p1);
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bfd_vma a2 = bfd_getb32 (p2);
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/* Preserve order if there's ambiguous contents. */
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if (a1 == a2)
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return (char *) p1 - (char *) p2;
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return a1 - a2;
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}
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int
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_bfd_sh64_crange_qsort_cmpl (const void *p1, const void *p2)
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{
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bfd_vma a1 = (bfd_vma) bfd_getl32 (p1);
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bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
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/* Preserve order if there's ambiguous contents. */
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if (a1 == a2)
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return (char *) p1 - (char *) p2;
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return a1 - a2;
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}
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int
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_bfd_sh64_crange_bsearch_cmpb (const void *p1, const void *p2)
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{
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bfd_vma a1 = *(bfd_vma *) p1;
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bfd_vma a2 = (bfd_vma) bfd_getb32 (p2);
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bfd_size_type size
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= (bfd_size_type) bfd_getb32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
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if (a1 >= a2 + size)
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return 1;
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if (a1 < a2)
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return -1;
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return 0;
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}
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int
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_bfd_sh64_crange_bsearch_cmpl (const void *p1, const void *p2)
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{
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bfd_vma a1 = *(bfd_vma *) p1;
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bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
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bfd_size_type size
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= (bfd_size_type) bfd_getl32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
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if (a1 >= a2 + size)
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return 1;
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if (a1 < a2)
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return -1;
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return 0;
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}
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/* Check whether a specific address is specified within a .cranges
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section. Return FALSE if not found, and TRUE if found, and the region
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filled into RANGEP if non-NULL. */
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static bfd_boolean
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sh64_address_in_cranges (asection *cranges, bfd_vma addr,
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sh64_elf_crange *rangep)
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{
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bfd_byte *cranges_contents;
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bfd_byte *found_rangep;
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bfd_size_type cranges_size = cranges->size;
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/* If the size is not a multiple of the cranges entry size, then
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something is badly wrong. */
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if ((cranges_size % SH64_CRANGE_SIZE) != 0)
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return FALSE;
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/* If this section has relocations, then we can't do anything sane. */
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if (bfd_get_section_flags (cranges->owner, cranges) & SEC_RELOC)
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return FALSE;
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/* Has some kind soul (or previous call) left processed, sorted contents
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for us? */
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if ((bfd_get_section_flags (cranges->owner, cranges) & SEC_IN_MEMORY)
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&& elf_section_data (cranges)->this_hdr.sh_type == SHT_SH5_CR_SORTED)
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cranges_contents = cranges->contents;
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else
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{
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if (!bfd_malloc_and_get_section (cranges->owner, cranges,
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&cranges_contents))
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goto error_return;
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/* Is it sorted? */
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if (elf_section_data (cranges)->this_hdr.sh_type
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!= SHT_SH5_CR_SORTED)
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/* Nope. Lets sort it. */
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qsort (cranges_contents, cranges_size / SH64_CRANGE_SIZE,
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SH64_CRANGE_SIZE,
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bfd_big_endian (cranges->owner)
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? _bfd_sh64_crange_qsort_cmpb : _bfd_sh64_crange_qsort_cmpl);
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/* Let's keep it around. */
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cranges->contents = cranges_contents;
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bfd_set_section_flags (cranges->owner, cranges,
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bfd_get_section_flags (cranges->owner, cranges)
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| SEC_IN_MEMORY);
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/* It's sorted now. */
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elf_section_data (cranges)->this_hdr.sh_type = SHT_SH5_CR_SORTED;
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}
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/* Try and find a matching range. */
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found_rangep
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= bsearch (&addr, cranges_contents, cranges_size / SH64_CRANGE_SIZE,
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SH64_CRANGE_SIZE,
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bfd_big_endian (cranges->owner)
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? _bfd_sh64_crange_bsearch_cmpb
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: _bfd_sh64_crange_bsearch_cmpl);
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/* Fill in a few return values if we found a matching range. */
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if (found_rangep)
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{
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enum sh64_elf_cr_type cr_type
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= bfd_get_16 (cranges->owner,
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SH64_CRANGE_CR_TYPE_OFFSET + found_rangep);
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bfd_vma cr_addr
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= bfd_get_32 (cranges->owner,
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SH64_CRANGE_CR_ADDR_OFFSET
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+ (char *) found_rangep);
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bfd_size_type cr_size
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= bfd_get_32 (cranges->owner,
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SH64_CRANGE_CR_SIZE_OFFSET
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+ (char *) found_rangep);
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rangep->cr_addr = cr_addr;
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rangep->cr_size = cr_size;
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rangep->cr_type = cr_type;
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return TRUE;
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}
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/* There is a .cranges section, but it does not have a descriptor
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matching this address. */
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return FALSE;
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error_return:
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if (cranges_contents != NULL)
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free (cranges_contents);
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return FALSE;
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}
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/* Determine what ADDR points to in SEC, and fill in a range descriptor in
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*RANGEP if it's non-NULL. */
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enum sh64_elf_cr_type
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sh64_get_contents_type (asection *sec, bfd_vma addr, sh64_elf_crange *rangep)
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{
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asection *cranges;
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/* Fill in the range with the boundaries of the section as a default. */
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if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
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&& elf_elfheader (sec->owner)->e_type == ET_EXEC)
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{
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rangep->cr_addr = bfd_get_section_vma (sec->owner, sec);
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rangep->cr_size = sec->size;
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rangep->cr_type = CRT_NONE;
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}
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else
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return FALSE;
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/* If none of the pertinent bits are set, then it's a SHcompact (or at
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least not SHmedia). */
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if ((elf_section_data (sec)->this_hdr.sh_flags
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& (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == 0)
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{
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enum sh64_elf_cr_type cr_type
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= ((bfd_get_section_flags (sec->owner, sec) & SEC_CODE) != 0
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? CRT_SH5_ISA16 : CRT_DATA);
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rangep->cr_type = cr_type;
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return cr_type;
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}
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/* If only the SHF_SH5_ISA32 bit is set, then we have SHmedia. */
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if ((elf_section_data (sec)->this_hdr.sh_flags
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& (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == SHF_SH5_ISA32)
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{
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rangep->cr_type = CRT_SH5_ISA32;
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return CRT_SH5_ISA32;
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}
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/* Otherwise, we have to look up the .cranges section. */
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cranges = bfd_get_section_by_name (sec->owner, SH64_CRANGES_SECTION_NAME);
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if (cranges == NULL)
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/* A mixed section but there's no .cranges section. This is probably
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bad input; it does not comply to specs. */
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return CRT_NONE;
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/* If this call fails, we will still have CRT_NONE in rangep->cr_type
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and that will be suitable to return. */
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sh64_address_in_cranges (cranges, addr, rangep);
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return rangep->cr_type;
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}
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/* This is a simpler exported interface for the benefit of gdb et al. */
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bfd_boolean
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sh64_address_is_shmedia (asection *sec, bfd_vma addr)
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{
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sh64_elf_crange dummy;
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return sh64_get_contents_type (sec, addr, &dummy) == CRT_SH5_ISA32;
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}
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