47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#include <elf.h>
|
|
#include <link.h>
|
|
#include "libc.h"
|
|
|
|
#define AUX_CNT 38
|
|
|
|
extern weak hidden const size_t _DYNAMIC[];
|
|
|
|
static int static_dl_iterate_phdr(int(*callback)(struct dl_phdr_info *info, size_t size, void *data), void *data)
|
|
{
|
|
unsigned char *p;
|
|
ElfW(Phdr) *phdr, *tls_phdr=0;
|
|
size_t base = 0;
|
|
size_t n;
|
|
struct dl_phdr_info info;
|
|
size_t i, aux[AUX_CNT] = {0};
|
|
|
|
for (i=0; libc.auxv[i]; i+=2)
|
|
if (libc.auxv[i]<AUX_CNT) aux[libc.auxv[i]] = libc.auxv[i+1];
|
|
|
|
for (p=(void *)aux[AT_PHDR],n=aux[AT_PHNUM]; n; n--,p+=aux[AT_PHENT]) {
|
|
phdr = (void *)p;
|
|
if (phdr->p_type == PT_PHDR)
|
|
base = aux[AT_PHDR] - phdr->p_vaddr;
|
|
if (phdr->p_type == PT_DYNAMIC && _DYNAMIC)
|
|
base = (size_t)_DYNAMIC - phdr->p_vaddr;
|
|
if (phdr->p_type == PT_TLS)
|
|
tls_phdr = phdr;
|
|
}
|
|
info.dlpi_addr = base;
|
|
info.dlpi_name = "/proc/self/exe";
|
|
info.dlpi_phdr = (void *)aux[AT_PHDR];
|
|
info.dlpi_phnum = aux[AT_PHNUM];
|
|
info.dlpi_adds = 0;
|
|
info.dlpi_subs = 0;
|
|
if (tls_phdr) {
|
|
info.dlpi_tls_modid = 1;
|
|
info.dlpi_tls_data = (void *)(base + tls_phdr->p_vaddr);
|
|
} else {
|
|
info.dlpi_tls_modid = 0;
|
|
info.dlpi_tls_data = 0;
|
|
}
|
|
return (callback)(&info, sizeof (info), data);
|
|
}
|
|
|
|
weak_alias(static_dl_iterate_phdr, dl_iterate_phdr);
|