43 lines
963 B
C
43 lines
963 B
C
#define _GNU_SOURCE
|
|
#include <link.h>
|
|
#include <stdint.h>
|
|
|
|
struct find_exidx_data {
|
|
uintptr_t pc, exidx_start;
|
|
int exidx_len;
|
|
};
|
|
|
|
static int find_exidx(struct dl_phdr_info *info, size_t size, void *ptr)
|
|
{
|
|
struct find_exidx_data *data = ptr;
|
|
const ElfW(Phdr) *phdr = info->dlpi_phdr;
|
|
uintptr_t addr, exidx_start = 0;
|
|
int i, match = 0, exidx_len = 0;
|
|
|
|
for (i = info->dlpi_phnum; i > 0; i--, phdr++) {
|
|
addr = info->dlpi_addr + phdr->p_vaddr;
|
|
switch (phdr->p_type) {
|
|
case PT_LOAD:
|
|
match |= data->pc >= addr && data->pc < addr + phdr->p_memsz;
|
|
break;
|
|
case PT_ARM_EXIDX:
|
|
exidx_start = addr;
|
|
exidx_len = phdr->p_memsz;
|
|
break;
|
|
}
|
|
}
|
|
data->exidx_start = exidx_start;
|
|
data->exidx_len = exidx_len;
|
|
return match;
|
|
}
|
|
|
|
uintptr_t __gnu_Unwind_Find_exidx(uintptr_t pc, int *pcount)
|
|
{
|
|
struct find_exidx_data data;
|
|
data.pc = pc;
|
|
if (dl_iterate_phdr(find_exidx, &data) <= 0)
|
|
return 0;
|
|
*pcount = data.exidx_len / 8;
|
|
return data.exidx_start;
|
|
}
|