You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
3.7 KiB
135 lines
3.7 KiB
4 months ago
|
/* AArch64 specific symbolic name handling.
|
||
|
|
Copyright (C) 2013, 2015, 2017 Red Hat, Inc.
|
||
|
|
This file is part of elfutils.
|
||
|
|
|
||
|
|
This file is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of either
|
||
|
|
|
||
|
|
* the GNU Lesser General Public License as published by the Free
|
||
|
|
Software Foundation; either version 3 of the License, or (at
|
||
|
|
your option) any later version
|
||
|
|
|
||
|
|
or
|
||
|
|
|
||
|
|
* 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
|
||
|
|
|
||
|
|
or both in parallel, as here.
|
||
|
|
|
||
|
|
elfutils 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 copies of the GNU General Public License and
|
||
|
|
the GNU Lesser General Public License along with this program. If
|
||
|
|
not, see <http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
# include <config.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <elf.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#define BACKEND aarch64_
|
||
|
|
#include "libebl_CPU.h"
|
||
|
|
|
||
|
|
|
||
|
|
/* Check for the simple reloc types. */
|
||
|
|
Elf_Type
|
||
|
|
aarch64_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
|
||
|
|
int *addsub __attribute__ ((unused)))
|
||
|
|
{
|
||
|
|
switch (type)
|
||
|
|
{
|
||
|
|
case R_AARCH64_ABS64:
|
||
|
|
return ELF_T_XWORD;
|
||
|
|
case R_AARCH64_ABS32:
|
||
|
|
return ELF_T_WORD;
|
||
|
|
case R_AARCH64_ABS16:
|
||
|
|
return ELF_T_HALF;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return ELF_T_NUM;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If this is the _GLOBAL_OFFSET_TABLE_ symbol, then it should point in
|
||
|
|
the .got even if there is a .got.plt section.
|
||
|
|
https://sourceware.org/ml/libc-ports/2013-06/msg00057.html
|
||
|
|
https://bugzilla.redhat.com/show_bug.cgi?id=1201778
|
||
|
|
*/
|
||
|
|
bool
|
||
|
|
aarch64_check_special_symbol (Elf *elf, const GElf_Sym *sym,
|
||
|
|
const char *name, const GElf_Shdr *destshdr)
|
||
|
|
{
|
||
|
|
if (name != NULL
|
||
|
|
&& strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
|
|
{
|
||
|
|
size_t shstrndx;
|
||
|
|
if (elf_getshdrstrndx (elf, &shstrndx) != 0)
|
||
|
|
return false;
|
||
|
|
const char *sname = elf_strptr (elf, shstrndx, destshdr->sh_name);
|
||
|
|
if (sname != NULL
|
||
|
|
&& (strcmp (sname, ".got") == 0 || strcmp (sname, ".got.plt") == 0))
|
||
|
|
{
|
||
|
|
Elf_Scn *scn = NULL;
|
||
|
|
while ((scn = elf_nextscn (elf, scn)) != NULL)
|
||
|
|
{
|
||
|
|
GElf_Shdr shdr_mem;
|
||
|
|
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
|
||
|
|
if (shdr != NULL)
|
||
|
|
{
|
||
|
|
sname = elf_strptr (elf, shstrndx, shdr->sh_name);
|
||
|
|
if (sname != NULL && strcmp (sname, ".got") == 0)
|
||
|
|
return (sym->st_value >= shdr->sh_addr
|
||
|
|
&& sym->st_value < shdr->sh_addr + shdr->sh_size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* A data mapping symbol is a symbol with "$d" name or "$d.<any...>" name,
|
||
|
|
STT_NOTYPE, STB_LOCAL and st_size of zero. The indicate the stat of a
|
||
|
|
sequence of data items. */
|
||
|
|
bool
|
||
|
|
aarch64_data_marker_symbol (const GElf_Sym *sym, const char *sname)
|
||
|
|
{
|
||
|
|
return (sym != NULL && sname != NULL
|
||
|
|
&& sym->st_size == 0 && GELF_ST_BIND (sym->st_info) == STB_LOCAL
|
||
|
|
&& GELF_ST_TYPE (sym->st_info) == STT_NOTYPE
|
||
|
|
&& (strcmp (sname, "$d") == 0 || strncmp (sname, "$d.", 3) == 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *
|
||
|
|
aarch64_dynamic_tag_name (int64_t tag, char *buf __attribute__ ((unused)),
|
||
|
|
size_t len __attribute__ ((unused)))
|
||
|
|
{
|
||
|
|
switch (tag)
|
||
|
|
{
|
||
|
|
case DT_AARCH64_BTI_PLT:
|
||
|
|
return "AARCH64_BTI_PLT";
|
||
|
|
case DT_AARCH64_PAC_PLT:
|
||
|
|
return "AARCH64_PAC_PLT";
|
||
|
|
case DT_AARCH64_VARIANT_PCS:
|
||
|
|
return "AARCH64_VARIANT_PCS";
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool
|
||
|
|
aarch64_dynamic_tag_check (int64_t tag)
|
||
|
|
{
|
||
|
|
return (tag == DT_AARCH64_BTI_PLT
|
||
|
|
|| tag == DT_AARCH64_PAC_PLT
|
||
|
|
|| tag == DT_AARCH64_VARIANT_PCS);
|
||
|
|
}
|