mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* Copyright (C) 2005-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <link.h>
|
|
#include <unwind.h>
|
|
|
|
struct unw_eh_callback_data
|
|
{
|
|
_Unwind_Ptr pc;
|
|
_Unwind_Ptr exidx_start;
|
|
int exidx_len;
|
|
};
|
|
|
|
|
|
/* Callback to determins if the PC lies within an object, and remember the
|
|
location of the exception index table if it does. */
|
|
|
|
static int
|
|
find_exidx_callback (struct dl_phdr_info * info, size_t size, void * ptr)
|
|
{
|
|
struct unw_eh_callback_data * data;
|
|
const ElfW(Phdr) *phdr;
|
|
int i;
|
|
int match;
|
|
_Unwind_Ptr load_base;
|
|
|
|
data = (struct unw_eh_callback_data *) ptr;
|
|
load_base = info->dlpi_addr;
|
|
phdr = info->dlpi_phdr;
|
|
|
|
match = 0;
|
|
for (i = info->dlpi_phnum; i > 0; i--, phdr++)
|
|
{
|
|
if (phdr->p_type == PT_LOAD)
|
|
{
|
|
_Unwind_Ptr vaddr = phdr->p_vaddr + load_base;
|
|
if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz)
|
|
match = 1;
|
|
}
|
|
else if (phdr->p_type == PT_ARM_EXIDX)
|
|
{
|
|
data->exidx_start = (_Unwind_Ptr) (phdr->p_vaddr + load_base);
|
|
data->exidx_len = phdr->p_memsz;
|
|
}
|
|
}
|
|
|
|
return match;
|
|
}
|
|
|
|
|
|
/* Find the exception index table containing PC. */
|
|
|
|
_Unwind_Ptr
|
|
__gnu_Unwind_Find_exidx (_Unwind_Ptr pc, int * pcount)
|
|
{
|
|
struct unw_eh_callback_data data;
|
|
|
|
data.pc = pc;
|
|
data.exidx_start = 0;
|
|
if (__dl_iterate_phdr (find_exidx_callback, &data) <= 0)
|
|
return 0;
|
|
|
|
*pcount = data.exidx_len / 8;
|
|
return data.exidx_start;
|
|
}
|