1105 lines
28 KiB
C
1105 lines
28 KiB
C
/* elfedit.c -- Update the ELF header of an ELF format file
|
||
Copyright (C) 2010-2022 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU Binutils.
|
||
|
||
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. */
|
||
|
||
#include "config.h"
|
||
#include "sysdep.h"
|
||
#include "libiberty.h"
|
||
#include <assert.h>
|
||
|
||
#if __GNUC__ >= 2
|
||
/* Define BFD64 here, even if our default architecture is 32 bit ELF
|
||
as this will allow us to read in and parse 64bit and 32bit ELF files.
|
||
Only do this if we believe that the compiler can support a 64 bit
|
||
data type. For now we only rely on GCC being able to do this. */
|
||
#define BFD64
|
||
#endif
|
||
|
||
#include "bfd.h"
|
||
#include "elfcomm.h"
|
||
#include "bucomm.h"
|
||
|
||
#include "elf/common.h"
|
||
#include "elf/external.h"
|
||
#include "elf/internal.h"
|
||
|
||
#include "getopt.h"
|
||
#include "libiberty.h"
|
||
#include "safe-ctype.h"
|
||
#include "filenames.h"
|
||
|
||
char * program_name = "elfedit";
|
||
static long archive_file_offset;
|
||
static unsigned long archive_file_size;
|
||
static Elf_Internal_Ehdr elf_header;
|
||
static Elf32_External_Ehdr ehdr32;
|
||
static Elf64_External_Ehdr ehdr64;
|
||
static int input_elf_machine = -1;
|
||
static int output_elf_machine = -1;
|
||
static int input_elf_type = -1;
|
||
static int output_elf_type = -1;
|
||
static int input_elf_osabi = -1;
|
||
static int output_elf_osabi = -1;
|
||
static int input_elf_abiversion = -1;
|
||
static int output_elf_abiversion = -1;
|
||
enum elfclass
|
||
{
|
||
ELF_CLASS_UNKNOWN = -1,
|
||
ELF_CLASS_NONE = ELFCLASSNONE,
|
||
ELF_CLASS_32 = ELFCLASS32,
|
||
ELF_CLASS_64 = ELFCLASS64,
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||
ELF_CLASS_BOTH
|
||
};
|
||
static enum elfclass input_elf_class = ELF_CLASS_UNKNOWN;
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||
static enum elfclass output_elf_class = ELF_CLASS_BOTH;
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||
|
||
#ifdef HAVE_MMAP
|
||
#include <sys/mman.h>
|
||
|
||
static unsigned int enable_x86_features;
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||
static unsigned int disable_x86_features;
|
||
|
||
static int
|
||
update_gnu_property (const char *file_name, FILE *file)
|
||
{
|
||
char *map;
|
||
Elf_Internal_Phdr *phdrs;
|
||
struct stat st_buf;
|
||
unsigned int i;
|
||
int ret;
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||
|
||
if (!enable_x86_features && !disable_x86_features)
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return 0;
|
||
|
||
if (elf_header.e_machine != EM_386
|
||
&& elf_header.e_machine != EM_X86_64)
|
||
{
|
||
error (_("%s: Not an i386 nor x86-64 ELF file\n"), file_name);
|
||
return 0;
|
||
}
|
||
|
||
if (fstat (fileno (file), &st_buf) < 0)
|
||
{
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||
error (_("%s: stat () failed\n"), file_name);
|
||
return 1;
|
||
}
|
||
|
||
map = mmap (NULL, st_buf.st_size, PROT_READ | PROT_WRITE,
|
||
MAP_SHARED, fileno (file), 0);
|
||
if (map == MAP_FAILED)
|
||
{
|
||
error (_("%s: mmap () failed\n"), file_name);
|
||
return 0;
|
||
}
|
||
|
||
phdrs = xmalloc (elf_header.e_phnum * sizeof (*phdrs));
|
||
|
||
if (elf_header.e_ident[EI_CLASS] == ELFCLASS32)
|
||
{
|
||
Elf32_External_Phdr *phdrs32
|
||
= (Elf32_External_Phdr *) (map + elf_header.e_phoff);
|
||
for (i = 0; i < elf_header.e_phnum; i++)
|
||
{
|
||
phdrs[i].p_type = BYTE_GET (phdrs32[i].p_type);
|
||
phdrs[i].p_offset = BYTE_GET (phdrs32[i].p_offset);
|
||
phdrs[i].p_vaddr = BYTE_GET (phdrs32[i].p_vaddr);
|
||
phdrs[i].p_paddr = BYTE_GET (phdrs32[i].p_paddr);
|
||
phdrs[i].p_filesz = BYTE_GET (phdrs32[i].p_filesz);
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||
phdrs[i].p_memsz = BYTE_GET (phdrs32[i].p_memsz);
|
||
phdrs[i].p_flags = BYTE_GET (phdrs32[i].p_flags);
|
||
phdrs[i].p_align = BYTE_GET (phdrs32[i].p_align);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
Elf64_External_Phdr *phdrs64
|
||
= (Elf64_External_Phdr *) (map + elf_header.e_phoff);
|
||
for (i = 0; i < elf_header.e_phnum; i++)
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||
{
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||
phdrs[i].p_type = BYTE_GET (phdrs64[i].p_type);
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||
phdrs[i].p_offset = BYTE_GET (phdrs64[i].p_offset);
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||
phdrs[i].p_vaddr = BYTE_GET (phdrs64[i].p_vaddr);
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phdrs[i].p_paddr = BYTE_GET (phdrs64[i].p_paddr);
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phdrs[i].p_filesz = BYTE_GET (phdrs64[i].p_filesz);
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||
phdrs[i].p_memsz = BYTE_GET (phdrs64[i].p_memsz);
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phdrs[i].p_flags = BYTE_GET (phdrs64[i].p_flags);
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||
phdrs[i].p_align = BYTE_GET (phdrs64[i].p_align);
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||
}
|
||
}
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||
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ret = 0;
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for (i = 0; i < elf_header.e_phnum; i++)
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if (phdrs[i].p_type == PT_NOTE)
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{
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size_t offset = phdrs[i].p_offset;
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size_t size = phdrs[i].p_filesz;
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size_t align = phdrs[i].p_align;
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char *buf = map + offset;
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char *p = buf;
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while (p < buf + size)
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{
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Elf_External_Note *xnp = (Elf_External_Note *) p;
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Elf_Internal_Note in;
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||
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if (offsetof (Elf_External_Note, name) > buf - p + size)
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{
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ret = 1;
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goto out;
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}
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in.type = BYTE_GET (xnp->type);
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in.namesz = BYTE_GET (xnp->namesz);
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in.namedata = xnp->name;
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if (in.namesz > buf - in.namedata + size)
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{
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ret = 1;
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goto out;
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}
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in.descsz = BYTE_GET (xnp->descsz);
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in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align);
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in.descpos = offset + (in.descdata - buf);
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if (in.descsz != 0
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&& (in.descdata >= buf + size
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|| in.descsz > buf - in.descdata + size))
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{
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ret = 1;
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goto out;
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||
}
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if (in.namesz == sizeof "GNU"
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&& strcmp (in.namedata, "GNU") == 0
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&& in.type == NT_GNU_PROPERTY_TYPE_0)
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||
{
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||
unsigned char *ptr;
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unsigned char *ptr_end;
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||
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if (in.descsz < 8 || (in.descsz % align) != 0)
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{
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ret = 1;
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goto out;
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}
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ptr = (unsigned char *) in.descdata;
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ptr_end = ptr + in.descsz;
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do
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{
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unsigned int type = byte_get (ptr, 4);
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unsigned int datasz = byte_get (ptr + 4, 4);
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unsigned int bitmask, old_bitmask;
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ptr += 8;
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if ((ptr + datasz) > ptr_end)
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{
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ret = 1;
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goto out;
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}
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if (type == GNU_PROPERTY_X86_FEATURE_1_AND)
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{
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if (datasz != 4)
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{
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ret = 1;
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goto out;
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}
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old_bitmask = byte_get (ptr, 4);
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bitmask = old_bitmask;
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if (enable_x86_features)
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bitmask |= enable_x86_features;
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if (disable_x86_features)
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bitmask &= ~disable_x86_features;
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if (old_bitmask != bitmask)
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byte_put (ptr, bitmask, 4);
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goto out;
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}
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ptr += ELF_ALIGN_UP (datasz, align);
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}
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while ((ptr_end - ptr) >= 8);
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}
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p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align);
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}
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}
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out:
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if (ret != 0)
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error (_("%s: Invalid PT_NOTE segment\n"), file_name);
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free (phdrs);
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munmap (map, st_buf.st_size);
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return ret;
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}
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/* Set enable_x86_features and disable_x86_features for a feature
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string, FEATURE. */
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static int
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elf_x86_feature (const char *feature, int enable)
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{
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unsigned int x86_feature;
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if (strcasecmp (feature, "ibt") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_IBT;
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else if (strcasecmp (feature, "shstk") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
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else if (strcasecmp (feature, "lam_u48") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_LAM_U48;
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else if (strcasecmp (feature, "lam_u57") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_LAM_U57;
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else
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{
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error (_("Unknown x86 feature: %s\n"), feature);
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return -1;
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}
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if (enable)
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{
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enable_x86_features |= x86_feature;
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disable_x86_features &= ~x86_feature;
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}
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else
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{
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disable_x86_features |= x86_feature;
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enable_x86_features &= ~x86_feature;
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}
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return 0;
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}
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#endif
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/* Return ELF class for a machine type, MACH. */
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static enum elfclass
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elf_class (int mach)
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{
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switch (mach)
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{
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||
case EM_386:
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||
case EM_IAMCU:
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return ELF_CLASS_32;
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case EM_L1OM:
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case EM_K1OM:
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return ELF_CLASS_64;
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||
case EM_X86_64:
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case EM_NONE:
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return ELF_CLASS_BOTH;
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default:
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return ELF_CLASS_BOTH;
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||
}
|
||
}
|
||
|
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static int
|
||
update_elf_header (const char *file_name, FILE *file)
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{
|
||
int class, machine, type, status, osabi, abiversion;
|
||
|
||
if (elf_header.e_ident[EI_VERSION] != EV_CURRENT)
|
||
{
|
||
error
|
||
(_("%s: Unsupported EI_VERSION: %d is not %d\n"),
|
||
file_name, elf_header.e_ident[EI_VERSION],
|
||
EV_CURRENT);
|
||
return 0;
|
||
}
|
||
|
||
/* Return if e_machine is the same as output_elf_machine. */
|
||
if (output_elf_machine == elf_header.e_machine)
|
||
return 1;
|
||
|
||
class = elf_header.e_ident[EI_CLASS];
|
||
machine = elf_header.e_machine;
|
||
|
||
/* Skip if class doesn't match. */
|
||
if (input_elf_class == ELF_CLASS_UNKNOWN)
|
||
input_elf_class = elf_class (machine);
|
||
|
||
if (input_elf_class != ELF_CLASS_BOTH
|
||
&& (int) input_elf_class != class)
|
||
{
|
||
error
|
||
(_("%s: Unmatched input EI_CLASS: %d is not %d\n"),
|
||
file_name, class, input_elf_class);
|
||
return 0;
|
||
}
|
||
|
||
if (output_elf_class != ELF_CLASS_BOTH
|
||
&& (int) output_elf_class != class)
|
||
{
|
||
error
|
||
(_("%s: Unmatched output EI_CLASS: %d is not %d\n"),
|
||
file_name, class, output_elf_class);
|
||
return 0;
|
||
}
|
||
|
||
/* Skip if e_machine doesn't match. */
|
||
if (input_elf_machine != -1 && machine != input_elf_machine)
|
||
{
|
||
error
|
||
(_("%s: Unmatched e_machine: %d is not %d\n"),
|
||
file_name, machine, input_elf_machine);
|
||
return 0;
|
||
}
|
||
|
||
type = elf_header.e_type;
|
||
|
||
/* Skip if e_type doesn't match. */
|
||
if (input_elf_type != -1 && type != input_elf_type)
|
||
{
|
||
error
|
||
(_("%s: Unmatched e_type: %d is not %d\n"),
|
||
file_name, type, input_elf_type);
|
||
return 0;
|
||
}
|
||
|
||
osabi = elf_header.e_ident[EI_OSABI];
|
||
|
||
/* Skip if OSABI doesn't match. */
|
||
if (input_elf_osabi != -1 && osabi != input_elf_osabi)
|
||
{
|
||
error
|
||
(_("%s: Unmatched EI_OSABI: %d is not %d\n"),
|
||
file_name, osabi, input_elf_osabi);
|
||
return 0;
|
||
}
|
||
|
||
abiversion = elf_header.e_ident[EI_ABIVERSION];
|
||
|
||
/* Skip if ABIVERSION doesn't match. */
|
||
if (input_elf_abiversion != -1
|
||
&& abiversion != input_elf_abiversion)
|
||
{
|
||
error
|
||
(_("%s: Unmatched EI_ABIVERSION: %d is not %d\n"),
|
||
file_name, abiversion, input_elf_abiversion);
|
||
return 0;
|
||
}
|
||
|
||
/* Update e_machine, e_type and EI_OSABI. */
|
||
switch (class)
|
||
{
|
||
default:
|
||
/* We should never get here. */
|
||
abort ();
|
||
break;
|
||
case ELFCLASS32:
|
||
if (output_elf_machine != -1)
|
||
BYTE_PUT (ehdr32.e_machine, output_elf_machine);
|
||
if (output_elf_type != -1)
|
||
BYTE_PUT (ehdr32.e_type, output_elf_type);
|
||
if (output_elf_osabi != -1)
|
||
ehdr32.e_ident[EI_OSABI] = output_elf_osabi;
|
||
if (output_elf_abiversion != -1)
|
||
ehdr32.e_ident[EI_ABIVERSION] = output_elf_abiversion;
|
||
status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1;
|
||
break;
|
||
case ELFCLASS64:
|
||
if (output_elf_machine != -1)
|
||
BYTE_PUT (ehdr64.e_machine, output_elf_machine);
|
||
if (output_elf_type != -1)
|
||
BYTE_PUT (ehdr64.e_type, output_elf_type);
|
||
if (output_elf_osabi != -1)
|
||
ehdr64.e_ident[EI_OSABI] = output_elf_osabi;
|
||
if (output_elf_abiversion != -1)
|
||
ehdr64.e_ident[EI_ABIVERSION] = output_elf_abiversion;
|
||
status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1;
|
||
break;
|
||
}
|
||
|
||
if (status != 1)
|
||
error (_("%s: Failed to update ELF header: %s\n"),
|
||
file_name, strerror (errno));
|
||
|
||
return status;
|
||
}
|
||
|
||
static int
|
||
get_file_header (FILE * file)
|
||
{
|
||
/* Read in the identity array. */
|
||
if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1)
|
||
return 0;
|
||
|
||
if (elf_header.e_ident[EI_MAG0] != ELFMAG0
|
||
|| elf_header.e_ident[EI_MAG1] != ELFMAG1
|
||
|| elf_header.e_ident[EI_MAG2] != ELFMAG2
|
||
|| elf_header.e_ident[EI_MAG3] != ELFMAG3)
|
||
return 0;
|
||
|
||
/* Determine how to read the rest of the header. */
|
||
switch (elf_header.e_ident[EI_DATA])
|
||
{
|
||
default: /* fall through */
|
||
case ELFDATANONE: /* fall through */
|
||
case ELFDATA2LSB:
|
||
byte_get = byte_get_little_endian;
|
||
byte_put = byte_put_little_endian;
|
||
break;
|
||
case ELFDATA2MSB:
|
||
byte_get = byte_get_big_endian;
|
||
byte_put = byte_put_big_endian;
|
||
break;
|
||
}
|
||
|
||
/* Read in the rest of the header. For now we only support 32 bit
|
||
and 64 bit ELF files. */
|
||
switch (elf_header.e_ident[EI_CLASS])
|
||
{
|
||
default:
|
||
return 0;
|
||
|
||
case ELFCLASS32:
|
||
if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT,
|
||
1, file) != 1)
|
||
return 0;
|
||
|
||
elf_header.e_type = BYTE_GET (ehdr32.e_type);
|
||
elf_header.e_machine = BYTE_GET (ehdr32.e_machine);
|
||
elf_header.e_version = BYTE_GET (ehdr32.e_version);
|
||
elf_header.e_entry = BYTE_GET (ehdr32.e_entry);
|
||
elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff);
|
||
elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff);
|
||
elf_header.e_flags = BYTE_GET (ehdr32.e_flags);
|
||
elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize);
|
||
elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize);
|
||
elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum);
|
||
elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize);
|
||
elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum);
|
||
elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx);
|
||
|
||
memcpy (&ehdr32, &elf_header, EI_NIDENT);
|
||
break;
|
||
|
||
case ELFCLASS64:
|
||
/* If we have been compiled with sizeof (bfd_vma) == 4, then
|
||
we will not be able to cope with the 64bit data found in
|
||
64 ELF files. Detect this now and abort before we start
|
||
overwriting things. */
|
||
if (sizeof (bfd_vma) < 8)
|
||
{
|
||
error (_("This executable has been built without support for a\n\
|
||
64 bit data type and so it cannot process 64 bit ELF files.\n"));
|
||
return 0;
|
||
}
|
||
|
||
if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT,
|
||
1, file) != 1)
|
||
return 0;
|
||
|
||
elf_header.e_type = BYTE_GET (ehdr64.e_type);
|
||
elf_header.e_machine = BYTE_GET (ehdr64.e_machine);
|
||
elf_header.e_version = BYTE_GET (ehdr64.e_version);
|
||
elf_header.e_entry = BYTE_GET (ehdr64.e_entry);
|
||
elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff);
|
||
elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff);
|
||
elf_header.e_flags = BYTE_GET (ehdr64.e_flags);
|
||
elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize);
|
||
elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize);
|
||
elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum);
|
||
elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize);
|
||
elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum);
|
||
elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx);
|
||
|
||
memcpy (&ehdr64, &elf_header, EI_NIDENT);
|
||
break;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/* Process one ELF object file according to the command line options.
|
||
This file may actually be stored in an archive. The file is
|
||
positioned at the start of the ELF object. */
|
||
|
||
static int
|
||
process_object (const char *file_name, FILE *file)
|
||
{
|
||
/* Rememeber where we are. */
|
||
long offset = ftell (file);
|
||
|
||
if (! get_file_header (file))
|
||
{
|
||
error (_("%s: Failed to read ELF header\n"), file_name);
|
||
return 1;
|
||
}
|
||
|
||
/* Go to the position of the ELF header. */
|
||
if (fseek (file, offset, SEEK_SET) != 0)
|
||
{
|
||
error (_("%s: Failed to seek to ELF header\n"), file_name);
|
||
}
|
||
|
||
if (! update_elf_header (file_name, file))
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Process an ELF archive.
|
||
On entry the file is positioned just after the ARMAG string. */
|
||
|
||
static int
|
||
process_archive (const char * file_name, FILE * file,
|
||
bool is_thin_archive)
|
||
{
|
||
struct archive_info arch;
|
||
struct archive_info nested_arch;
|
||
size_t got;
|
||
int ret;
|
||
struct stat statbuf;
|
||
|
||
/* The ARCH structure is used to hold information about this archive. */
|
||
arch.file_name = NULL;
|
||
arch.file = NULL;
|
||
arch.index_array = NULL;
|
||
arch.sym_table = NULL;
|
||
arch.longnames = NULL;
|
||
|
||
/* The NESTED_ARCH structure is used as a single-item cache of information
|
||
about a nested archive (when members of a thin archive reside within
|
||
another regular archive file). */
|
||
nested_arch.file_name = NULL;
|
||
nested_arch.file = NULL;
|
||
nested_arch.index_array = NULL;
|
||
nested_arch.sym_table = NULL;
|
||
nested_arch.longnames = NULL;
|
||
|
||
if (fstat (fileno (file), &statbuf) < 0
|
||
|| setup_archive (&arch, file_name, file, statbuf.st_size,
|
||
is_thin_archive, false) != 0)
|
||
{
|
||
ret = 1;
|
||
goto out;
|
||
}
|
||
|
||
ret = 0;
|
||
|
||
while (1)
|
||
{
|
||
char * name;
|
||
size_t namelen;
|
||
char * qualified_name;
|
||
|
||
/* Read the next archive header. */
|
||
if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0)
|
||
{
|
||
error (_("%s: failed to seek to next archive header\n"),
|
||
file_name);
|
||
return 1;
|
||
}
|
||
got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file);
|
||
if (got != sizeof arch.arhdr)
|
||
{
|
||
if (got == 0)
|
||
break;
|
||
error (_("%s: failed to read archive header\n"),
|
||
file_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0)
|
||
{
|
||
error (_("%s: did not find a valid archive header\n"),
|
||
arch.file_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
|
||
arch.next_arhdr_offset += sizeof arch.arhdr;
|
||
|
||
archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10);
|
||
if (archive_file_size & 01)
|
||
++archive_file_size;
|
||
|
||
name = get_archive_member_name (&arch, &nested_arch);
|
||
if (name == NULL)
|
||
{
|
||
error (_("%s: bad archive file name\n"), file_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
namelen = strlen (name);
|
||
|
||
qualified_name = make_qualified_name (&arch, &nested_arch, name);
|
||
if (qualified_name == NULL)
|
||
{
|
||
error (_("%s: bad archive file name\n"), file_name);
|
||
free (name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
|
||
if (is_thin_archive && arch.nested_member_origin == 0)
|
||
{
|
||
/* This is a proxy for an external member of a thin archive. */
|
||
FILE *member_file;
|
||
char *member_file_name = adjust_relative_path (file_name,
|
||
name, namelen);
|
||
free (name);
|
||
if (member_file_name == NULL)
|
||
{
|
||
free (qualified_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
|
||
member_file = fopen (member_file_name, "r+b");
|
||
if (member_file == NULL)
|
||
{
|
||
error (_("Input file '%s' is not readable\n"),
|
||
member_file_name);
|
||
free (member_file_name);
|
||
free (qualified_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
|
||
archive_file_offset = arch.nested_member_origin;
|
||
|
||
ret |= process_object (qualified_name, member_file);
|
||
|
||
fclose (member_file);
|
||
free (member_file_name);
|
||
}
|
||
else if (is_thin_archive)
|
||
{
|
||
free (name);
|
||
|
||
/* This is a proxy for a member of a nested archive. */
|
||
archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr;
|
||
|
||
/* The nested archive file will have been opened and setup by
|
||
get_archive_member_name. */
|
||
if (fseek (nested_arch.file, archive_file_offset,
|
||
SEEK_SET) != 0)
|
||
{
|
||
error (_("%s: failed to seek to archive member\n"),
|
||
nested_arch.file_name);
|
||
free (qualified_name);
|
||
ret = 1;
|
||
break;
|
||
}
|
||
|
||
ret |= process_object (qualified_name, nested_arch.file);
|
||
}
|
||
else
|
||
{
|
||
free (name);
|
||
archive_file_offset = arch.next_arhdr_offset;
|
||
arch.next_arhdr_offset += archive_file_size;
|
||
|
||
ret |= process_object (qualified_name, file);
|
||
}
|
||
|
||
free (qualified_name);
|
||
}
|
||
|
||
out:
|
||
if (nested_arch.file != NULL)
|
||
fclose (nested_arch.file);
|
||
release_archive (&nested_arch);
|
||
release_archive (&arch);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
check_file (const char *file_name, struct stat *statbuf_p)
|
||
{
|
||
struct stat statbuf;
|
||
|
||
if (statbuf_p == NULL)
|
||
statbuf_p = &statbuf;
|
||
|
||
if (stat (file_name, statbuf_p) < 0)
|
||
{
|
||
if (errno == ENOENT)
|
||
error (_("'%s': No such file\n"), file_name);
|
||
else
|
||
error (_("Could not locate '%s'. System error message: %s\n"),
|
||
file_name, strerror (errno));
|
||
return 1;
|
||
}
|
||
|
||
#if defined (_WIN32) && !defined (__CYGWIN__)
|
||
else if (statbuf_p->st_size == 0)
|
||
{
|
||
/* MS-Windows 'stat' reports the null device as a regular file;
|
||
fix that. */
|
||
int fd = open (file_name, O_RDONLY | O_BINARY);
|
||
if (isatty (fd))
|
||
{
|
||
statbuf_p->st_mode &= ~S_IFREG;
|
||
statbuf_p->st_mode |= S_IFCHR;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
if (! S_ISREG (statbuf_p->st_mode))
|
||
{
|
||
error (_("'%s' is not an ordinary file\n"), file_name);
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
process_file (const char *file_name)
|
||
{
|
||
FILE * file;
|
||
char armag[SARMAG];
|
||
int ret;
|
||
|
||
if (check_file (file_name, NULL))
|
||
return 1;
|
||
|
||
file = fopen (file_name, "r+b");
|
||
if (file == NULL)
|
||
{
|
||
error (_("Input file '%s' is not readable\n"), file_name);
|
||
return 1;
|
||
}
|
||
|
||
if (fread (armag, SARMAG, 1, file) != 1)
|
||
{
|
||
error (_("%s: Failed to read file's magic number\n"),
|
||
file_name);
|
||
fclose (file);
|
||
return 1;
|
||
}
|
||
|
||
if (memcmp (armag, ARMAG, SARMAG) == 0)
|
||
ret = process_archive (file_name, file, false);
|
||
else if (memcmp (armag, ARMAGT, SARMAG) == 0)
|
||
ret = process_archive (file_name, file, true);
|
||
else
|
||
{
|
||
rewind (file);
|
||
archive_file_size = archive_file_offset = 0;
|
||
ret = process_object (file_name, file);
|
||
#ifdef HAVE_MMAP
|
||
if (!ret
|
||
&& (elf_header.e_type == ET_EXEC
|
||
|| elf_header.e_type == ET_DYN))
|
||
ret = update_gnu_property (file_name, file);
|
||
#endif
|
||
}
|
||
|
||
fclose (file);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static const struct
|
||
{
|
||
int osabi;
|
||
const char *name;
|
||
}
|
||
osabis[] =
|
||
{
|
||
{ ELFOSABI_NONE, "none" },
|
||
{ ELFOSABI_HPUX, "HPUX" },
|
||
{ ELFOSABI_NETBSD, "NetBSD" },
|
||
{ ELFOSABI_GNU, "GNU" },
|
||
{ ELFOSABI_GNU, "Linux" },
|
||
{ ELFOSABI_SOLARIS, "Solaris" },
|
||
{ ELFOSABI_AIX, "AIX" },
|
||
{ ELFOSABI_IRIX, "Irix" },
|
||
{ ELFOSABI_FREEBSD, "FreeBSD" },
|
||
{ ELFOSABI_TRU64, "TRU64" },
|
||
{ ELFOSABI_MODESTO, "Modesto" },
|
||
{ ELFOSABI_OPENBSD, "OpenBSD" },
|
||
{ ELFOSABI_OPENVMS, "OpenVMS" },
|
||
{ ELFOSABI_NSK, "NSK" },
|
||
{ ELFOSABI_AROS, "AROS" },
|
||
{ ELFOSABI_FENIXOS, "FenixOS" }
|
||
};
|
||
|
||
/* Return ELFOSABI_XXX for an OSABI string, OSABI. */
|
||
|
||
static int
|
||
elf_osabi (const char *osabi)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (osabis); i++)
|
||
if (strcasecmp (osabi, osabis[i].name) == 0)
|
||
return osabis[i].osabi;
|
||
|
||
error (_("Unknown OSABI: %s\n"), osabi);
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Return EM_XXX for a machine string, MACH. */
|
||
|
||
static int
|
||
elf_machine (const char *mach)
|
||
{
|
||
if (strcasecmp (mach, "i386") == 0)
|
||
return EM_386;
|
||
if (strcasecmp (mach, "iamcu") == 0)
|
||
return EM_IAMCU;
|
||
if (strcasecmp (mach, "l1om") == 0)
|
||
return EM_L1OM;
|
||
if (strcasecmp (mach, "k1om") == 0)
|
||
return EM_K1OM;
|
||
if (strcasecmp (mach, "x86_64") == 0)
|
||
return EM_X86_64;
|
||
if (strcasecmp (mach, "x86-64") == 0)
|
||
return EM_X86_64;
|
||
if (strcasecmp (mach, "none") == 0)
|
||
return EM_NONE;
|
||
|
||
error (_("Unknown machine type: %s\n"), mach);
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Return ET_XXX for a type string, TYPE. */
|
||
|
||
static int
|
||
elf_type (const char *type)
|
||
{
|
||
if (strcasecmp (type, "rel") == 0)
|
||
return ET_REL;
|
||
if (strcasecmp (type, "exec") == 0)
|
||
return ET_EXEC;
|
||
if (strcasecmp (type, "dyn") == 0)
|
||
return ET_DYN;
|
||
if (strcasecmp (type, "none") == 0)
|
||
return ET_NONE;
|
||
|
||
error (_("Unknown type: %s\n"), type);
|
||
|
||
return -1;
|
||
}
|
||
|
||
enum command_line_switch
|
||
{
|
||
OPTION_INPUT_MACH = 150,
|
||
OPTION_OUTPUT_MACH,
|
||
OPTION_INPUT_TYPE,
|
||
OPTION_OUTPUT_TYPE,
|
||
OPTION_INPUT_OSABI,
|
||
OPTION_OUTPUT_OSABI,
|
||
OPTION_INPUT_ABIVERSION,
|
||
OPTION_OUTPUT_ABIVERSION,
|
||
#ifdef HAVE_MMAP
|
||
OPTION_ENABLE_X86_FEATURE,
|
||
OPTION_DISABLE_X86_FEATURE,
|
||
#endif
|
||
};
|
||
|
||
static struct option options[] =
|
||
{
|
||
{"input-mach", required_argument, 0, OPTION_INPUT_MACH},
|
||
{"output-mach", required_argument, 0, OPTION_OUTPUT_MACH},
|
||
{"input-type", required_argument, 0, OPTION_INPUT_TYPE},
|
||
{"output-type", required_argument, 0, OPTION_OUTPUT_TYPE},
|
||
{"input-osabi", required_argument, 0, OPTION_INPUT_OSABI},
|
||
{"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI},
|
||
{"input-abiversion", required_argument, 0, OPTION_INPUT_ABIVERSION},
|
||
{"output-abiversion", required_argument, 0, OPTION_OUTPUT_ABIVERSION},
|
||
#ifdef HAVE_MMAP
|
||
{"enable-x86-feature",
|
||
required_argument, 0, OPTION_ENABLE_X86_FEATURE},
|
||
{"disable-x86-feature",
|
||
required_argument, 0, OPTION_DISABLE_X86_FEATURE},
|
||
#endif
|
||
{"version", no_argument, 0, 'v'},
|
||
{"help", no_argument, 0, 'h'},
|
||
{0, no_argument, 0, 0}
|
||
};
|
||
|
||
ATTRIBUTE_NORETURN static void
|
||
usage (FILE *stream, int exit_status)
|
||
{
|
||
unsigned int i;
|
||
char *osabi = concat (osabis[0].name, NULL);
|
||
|
||
for (i = 1; i < ARRAY_SIZE (osabis); i++)
|
||
osabi = reconcat (osabi, osabi, "|", osabis[i].name, NULL);
|
||
|
||
fprintf (stream, _("Usage: %s <option(s)> elffile(s)\n"),
|
||
program_name);
|
||
fprintf (stream, _(" Update the ELF header of ELF files\n"));
|
||
fprintf (stream, _(" The options are:\n"));
|
||
fprintf (stream, _("\
|
||
--input-mach [none|i386|iamcu|l1om|k1om|x86_64]\n\
|
||
Set input machine type\n\
|
||
--output-mach [none|i386|iamcu|l1om|k1om|x86_64]\n\
|
||
Set output machine type\n\
|
||
--input-type [none|rel|exec|dyn]\n\
|
||
Set input file type\n\
|
||
--output-type [none|rel|exec|dyn]\n\
|
||
Set output file type\n\
|
||
--input-osabi [%s]\n\
|
||
Set input OSABI\n\
|
||
--output-osabi [%s]\n\
|
||
Set output OSABI\n\
|
||
--input-abiversion [0-255] Set input ABIVERSION\n\
|
||
--output-abiversion [0-255] Set output ABIVERSION\n"),
|
||
osabi, osabi);
|
||
#ifdef HAVE_MMAP
|
||
fprintf (stream, _("\
|
||
--enable-x86-feature [ibt|shstk|lam_u48|lam_u57]\n\
|
||
Enable x86 feature\n\
|
||
--disable-x86-feature [ibt|shstk|lam_u48|lam_u57]\n\
|
||
Disable x86 feature\n"));
|
||
#endif
|
||
fprintf (stream, _("\
|
||
-h --help Display this information\n\
|
||
-v --version Display the version number of %s\n\
|
||
"),
|
||
program_name);
|
||
if (REPORT_BUGS_TO[0] && exit_status == 0)
|
||
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
|
||
free (osabi);
|
||
exit (exit_status);
|
||
}
|
||
|
||
int
|
||
main (int argc, char ** argv)
|
||
{
|
||
int c, status;
|
||
char *end;
|
||
|
||
#ifdef HAVE_LC_MESSAGES
|
||
setlocale (LC_MESSAGES, "");
|
||
#endif
|
||
setlocale (LC_CTYPE, "");
|
||
bindtextdomain (PACKAGE, LOCALEDIR);
|
||
textdomain (PACKAGE);
|
||
|
||
expandargv (&argc, &argv);
|
||
|
||
while ((c = getopt_long (argc, argv, "hv",
|
||
options, (int *) 0)) != EOF)
|
||
{
|
||
switch (c)
|
||
{
|
||
case OPTION_INPUT_MACH:
|
||
input_elf_machine = elf_machine (optarg);
|
||
if (input_elf_machine < 0)
|
||
return 1;
|
||
input_elf_class = elf_class (input_elf_machine);
|
||
if (input_elf_class == ELF_CLASS_UNKNOWN)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_OUTPUT_MACH:
|
||
output_elf_machine = elf_machine (optarg);
|
||
if (output_elf_machine < 0)
|
||
return 1;
|
||
output_elf_class = elf_class (output_elf_machine);
|
||
if (output_elf_class == ELF_CLASS_UNKNOWN)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_INPUT_TYPE:
|
||
input_elf_type = elf_type (optarg);
|
||
if (input_elf_type < 0)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_OUTPUT_TYPE:
|
||
output_elf_type = elf_type (optarg);
|
||
if (output_elf_type < 0)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_INPUT_OSABI:
|
||
input_elf_osabi = elf_osabi (optarg);
|
||
if (input_elf_osabi < 0)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_OUTPUT_OSABI:
|
||
output_elf_osabi = elf_osabi (optarg);
|
||
if (output_elf_osabi < 0)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_INPUT_ABIVERSION:
|
||
input_elf_abiversion = strtoul (optarg, &end, 0);
|
||
if (*end != '\0'
|
||
|| input_elf_abiversion < 0
|
||
|| input_elf_abiversion > 255)
|
||
{
|
||
error (_("Invalid ABIVERSION: %s\n"), optarg);
|
||
return 1;
|
||
}
|
||
break;
|
||
|
||
case OPTION_OUTPUT_ABIVERSION:
|
||
output_elf_abiversion = strtoul (optarg, &end, 0);
|
||
if (*end != '\0'
|
||
|| output_elf_abiversion < 0
|
||
|| output_elf_abiversion > 255)
|
||
{
|
||
error (_("Invalid ABIVERSION: %s\n"), optarg);
|
||
return 1;
|
||
}
|
||
break;
|
||
|
||
#ifdef HAVE_MMAP
|
||
case OPTION_ENABLE_X86_FEATURE:
|
||
if (elf_x86_feature (optarg, 1) < 0)
|
||
return 1;
|
||
break;
|
||
|
||
case OPTION_DISABLE_X86_FEATURE:
|
||
if (elf_x86_feature (optarg, 0) < 0)
|
||
return 1;
|
||
break;
|
||
#endif
|
||
|
||
case 'h':
|
||
usage (stdout, 0);
|
||
|
||
case 'v':
|
||
print_version (program_name);
|
||
break;
|
||
|
||
default:
|
||
usage (stderr, 1);
|
||
}
|
||
}
|
||
|
||
if (optind == argc
|
||
|| (output_elf_machine == -1
|
||
#ifdef HAVE_MMAP
|
||
&& ! enable_x86_features
|
||
&& ! disable_x86_features
|
||
#endif
|
||
&& output_elf_type == -1
|
||
&& output_elf_osabi == -1
|
||
&& output_elf_abiversion == -1))
|
||
usage (stderr, 1);
|
||
|
||
status = 0;
|
||
while (optind < argc)
|
||
status |= process_file (argv[optind++]);
|
||
|
||
return status;
|
||
}
|