mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/* Test for dlinfo (RTLD_DI_PHDR).
|
|
Copyright (C) 2022-2023 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 <dlfcn.h>
|
|
#include <link.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/auxv.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/xdlfcn.h>
|
|
|
|
/* Used to verify that the program header array appears as expected
|
|
among the dl_iterate_phdr callback invocations. */
|
|
|
|
struct dlip_callback_args
|
|
{
|
|
struct link_map *l; /* l->l_addr is used to find the object. */
|
|
const ElfW(Phdr) *phdr; /* Expected program header pointed. */
|
|
int phnum; /* Expected program header count. */
|
|
bool found; /* True if l->l_addr has been found. */
|
|
};
|
|
|
|
static int
|
|
dlip_callback (struct dl_phdr_info *dlpi, size_t size, void *closure)
|
|
{
|
|
TEST_COMPARE (sizeof (*dlpi), size);
|
|
struct dlip_callback_args *args = closure;
|
|
|
|
if (dlpi->dlpi_addr == args->l->l_addr)
|
|
{
|
|
TEST_VERIFY (!args->found);
|
|
args->found = true;
|
|
TEST_VERIFY (args->phdr == dlpi->dlpi_phdr);
|
|
TEST_COMPARE (args->phnum, dlpi->dlpi_phnum);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* Avoid a copy relocation. */
|
|
struct r_debug *debug = xdlsym (RTLD_DEFAULT, "_r_debug");
|
|
struct link_map *l = (struct link_map *) debug->r_map;
|
|
TEST_VERIFY_EXIT (l != NULL);
|
|
|
|
do
|
|
{
|
|
printf ("info: checking link map %p (%p) for \"%s\"\n",
|
|
l, l->l_phdr, l->l_name);
|
|
|
|
/* Cause dlerror () to return an error message. */
|
|
dlsym (RTLD_DEFAULT, "does-not-exist");
|
|
|
|
/* Use the extension that link maps are valid dlopen handles. */
|
|
const ElfW(Phdr) *phdr;
|
|
int phnum = dlinfo (l, RTLD_DI_PHDR, &phdr);
|
|
TEST_VERIFY (phnum >= 0);
|
|
/* Verify that the error message has been cleared. */
|
|
TEST_COMPARE_STRING (dlerror (), NULL);
|
|
|
|
TEST_VERIFY (phdr == l->l_phdr);
|
|
TEST_COMPARE (phnum, l->l_phnum);
|
|
|
|
/* Check that we can find PT_DYNAMIC among the array. */
|
|
{
|
|
bool dynamic_found = false;
|
|
for (int i = 0; i < phnum; ++i)
|
|
if (phdr[i].p_type == PT_DYNAMIC)
|
|
{
|
|
dynamic_found = true;
|
|
TEST_COMPARE ((ElfW(Addr)) l->l_ld, l->l_addr + phdr[i].p_vaddr);
|
|
}
|
|
TEST_VERIFY (dynamic_found);
|
|
}
|
|
|
|
/* Check that dl_iterate_phdr finds the link map with the same
|
|
program headers. */
|
|
{
|
|
struct dlip_callback_args args =
|
|
{
|
|
.l = l,
|
|
.phdr = phdr,
|
|
.phnum = phnum,
|
|
.found = false,
|
|
};
|
|
TEST_COMPARE (dl_iterate_phdr (dlip_callback, &args), 0);
|
|
TEST_VERIFY (args.found);
|
|
}
|
|
|
|
if (l->l_prev == NULL)
|
|
{
|
|
/* This is the executable, so the information is also
|
|
available via getauxval. */
|
|
TEST_COMPARE_STRING (l->l_name, "");
|
|
TEST_VERIFY (phdr == (const ElfW(Phdr) *) getauxval (AT_PHDR));
|
|
TEST_COMPARE (phnum, getauxval (AT_PHNUM));
|
|
}
|
|
|
|
l = l->l_next;
|
|
}
|
|
while (l != NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|