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/* SuperH SH64-specific support for 32-bit ELF
Copyright (C) 2000-2016 Free Software Foundation, Inc.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define SH64_ELF
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/sh.h"
#include "elf32-sh64.h"
#include "../opcodes/sh64-opc.h"
static bfd_boolean sh64_address_in_cranges
(asection *cranges, bfd_vma, sh64_elf_crange *);
/* Ordering functions of a crange, for the qsort and bsearch calls and for
different endianness. */
int
_bfd_sh64_crange_qsort_cmpb (const void *p1, const void *p2)
{
bfd_vma a1 = bfd_getb32 (p1);
bfd_vma a2 = bfd_getb32 (p2);
/* Preserve order if there's ambiguous contents. */
if (a1 == a2)
return (char *) p1 - (char *) p2;
return a1 - a2;
}
int
_bfd_sh64_crange_qsort_cmpl (const void *p1, const void *p2)
{
bfd_vma a1 = (bfd_vma) bfd_getl32 (p1);
bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
/* Preserve order if there's ambiguous contents. */
if (a1 == a2)
return (char *) p1 - (char *) p2;
return a1 - a2;
}
int
_bfd_sh64_crange_bsearch_cmpb (const void *p1, const void *p2)
{
bfd_vma a1 = *(bfd_vma *) p1;
bfd_vma a2 = (bfd_vma) bfd_getb32 (p2);
bfd_size_type size
= (bfd_size_type) bfd_getb32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
if (a1 >= a2 + size)
return 1;
if (a1 < a2)
return -1;
return 0;
}
int
_bfd_sh64_crange_bsearch_cmpl (const void *p1, const void *p2)
{
bfd_vma a1 = *(bfd_vma *) p1;
bfd_vma a2 = (bfd_vma) bfd_getl32 (p2);
bfd_size_type size
= (bfd_size_type) bfd_getl32 (SH64_CRANGE_CR_SIZE_OFFSET + (char *) p2);
if (a1 >= a2 + size)
return 1;
if (a1 < a2)
return -1;
return 0;
}
/* Check whether a specific address is specified within a .cranges
section. Return FALSE if not found, and TRUE if found, and the region
filled into RANGEP if non-NULL. */
static bfd_boolean
sh64_address_in_cranges (asection *cranges, bfd_vma addr,
sh64_elf_crange *rangep)
{
bfd_byte *cranges_contents;
bfd_byte *found_rangep;
bfd_size_type cranges_size = cranges->size;
/* If the size is not a multiple of the cranges entry size, then
something is badly wrong. */
if ((cranges_size % SH64_CRANGE_SIZE) != 0)
return FALSE;
/* If this section has relocations, then we can't do anything sane. */
if (bfd_get_section_flags (cranges->owner, cranges) & SEC_RELOC)
return FALSE;
/* Has some kind soul (or previous call) left processed, sorted contents
for us? */
if ((bfd_get_section_flags (cranges->owner, cranges) & SEC_IN_MEMORY)
&& elf_section_data (cranges)->this_hdr.sh_type == SHT_SH5_CR_SORTED)
cranges_contents = cranges->contents;
else
{
if (!bfd_malloc_and_get_section (cranges->owner, cranges,
&cranges_contents))
goto error_return;
/* Is it sorted? */
if (elf_section_data (cranges)->this_hdr.sh_type
!= SHT_SH5_CR_SORTED)
/* Nope. Lets sort it. */
qsort (cranges_contents, cranges_size / SH64_CRANGE_SIZE,
SH64_CRANGE_SIZE,
bfd_big_endian (cranges->owner)
? _bfd_sh64_crange_qsort_cmpb : _bfd_sh64_crange_qsort_cmpl);
/* Let's keep it around. */
cranges->contents = cranges_contents;
bfd_set_section_flags (cranges->owner, cranges,
bfd_get_section_flags (cranges->owner, cranges)
| SEC_IN_MEMORY);
/* It's sorted now. */
elf_section_data (cranges)->this_hdr.sh_type = SHT_SH5_CR_SORTED;
}
/* Try and find a matching range. */
found_rangep
= bsearch (&addr, cranges_contents, cranges_size / SH64_CRANGE_SIZE,
SH64_CRANGE_SIZE,
bfd_big_endian (cranges->owner)
? _bfd_sh64_crange_bsearch_cmpb
: _bfd_sh64_crange_bsearch_cmpl);
/* Fill in a few return values if we found a matching range. */
if (found_rangep)
{
enum sh64_elf_cr_type cr_type
= bfd_get_16 (cranges->owner,
SH64_CRANGE_CR_TYPE_OFFSET + found_rangep);
bfd_vma cr_addr
= bfd_get_32 (cranges->owner,
SH64_CRANGE_CR_ADDR_OFFSET
+ (char *) found_rangep);
bfd_size_type cr_size
= bfd_get_32 (cranges->owner,
SH64_CRANGE_CR_SIZE_OFFSET
+ (char *) found_rangep);
rangep->cr_addr = cr_addr;
rangep->cr_size = cr_size;
rangep->cr_type = cr_type;
return TRUE;
}
/* There is a .cranges section, but it does not have a descriptor
matching this address. */
return FALSE;
error_return:
if (cranges_contents != NULL)
free (cranges_contents);
return FALSE;
}
/* Determine what ADDR points to in SEC, and fill in a range descriptor in
*RANGEP if it's non-NULL. */
enum sh64_elf_cr_type
sh64_get_contents_type (asection *sec, bfd_vma addr, sh64_elf_crange *rangep)
{
asection *cranges;
/* Fill in the range with the boundaries of the section as a default. */
if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
&& elf_elfheader (sec->owner)->e_type == ET_EXEC)
{
rangep->cr_addr = bfd_get_section_vma (sec->owner, sec);
rangep->cr_size = sec->size;
rangep->cr_type = CRT_NONE;
}
else
return FALSE;
/* If none of the pertinent bits are set, then it's a SHcompact (or at
least not SHmedia). */
if ((elf_section_data (sec)->this_hdr.sh_flags
& (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == 0)
{
enum sh64_elf_cr_type cr_type
= ((bfd_get_section_flags (sec->owner, sec) & SEC_CODE) != 0
? CRT_SH5_ISA16 : CRT_DATA);
rangep->cr_type = cr_type;
return cr_type;
}
/* If only the SHF_SH5_ISA32 bit is set, then we have SHmedia. */
if ((elf_section_data (sec)->this_hdr.sh_flags
& (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED)) == SHF_SH5_ISA32)
{
rangep->cr_type = CRT_SH5_ISA32;
return CRT_SH5_ISA32;
}
/* Otherwise, we have to look up the .cranges section. */
cranges = bfd_get_section_by_name (sec->owner, SH64_CRANGES_SECTION_NAME);
if (cranges == NULL)
/* A mixed section but there's no .cranges section. This is probably
bad input; it does not comply to specs. */
return CRT_NONE;
/* If this call fails, we will still have CRT_NONE in rangep->cr_type
and that will be suitable to return. */
sh64_address_in_cranges (cranges, addr, rangep);
return rangep->cr_type;
}
/* This is a simpler exported interface for the benefit of gdb et al. */
bfd_boolean
sh64_address_is_shmedia (asection *sec, bfd_vma addr)
{
sh64_elf_crange dummy;
return sh64_get_contents_type (sec, addr, &dummy) == CRT_SH5_ISA32;
}
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