mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-27 01:27:39 +01:00
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2004 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
/* Test to verify that we can siglongjmp() into a frame whose register
|
|
window is not backed by valid memory. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <setjmp.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/mman.h>
|
|
|
|
#ifdef HAVE_IA64INTRIN_H
|
|
# include <ia64intrin.h>
|
|
#endif
|
|
|
|
static sigjmp_buf env;
|
|
static int return_level;
|
|
static uintptr_t return_bsp;
|
|
static int verbose;
|
|
|
|
uintptr_t
|
|
get_bsp (void)
|
|
{
|
|
#ifdef __INTEL_COMPILER
|
|
return __getReg (_IA64_REG_AR_BSP);
|
|
#else
|
|
return (uintptr_t) __builtin_ia64_bsp ();
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
sighandler (int signal, void *siginfo, void *sigcontext)
|
|
{
|
|
ucontext_t *uc = sigcontext;
|
|
int local = 0;
|
|
|
|
if (verbose)
|
|
printf ("got signal, stack at %p, saved bsp=0x%lx\n",
|
|
&local, uc->uc_mcontext.sc_ar_bsp);
|
|
siglongjmp (env, 1);
|
|
}
|
|
|
|
/* Direct call of doit () at the end of doit () would get optimized by GCC to
|
|
a branch. */
|
|
static void doit (int n);
|
|
static volatile void (*doit_pointer) (int n) = doit;
|
|
|
|
static void
|
|
doit (int n)
|
|
{
|
|
uintptr_t guard_page_addr, bsp = get_bsp ();
|
|
void *ret;
|
|
|
|
if (n == 0)
|
|
{
|
|
size_t page_size = getpagesize ();
|
|
|
|
guard_page_addr = (bsp + page_size - 1) & -page_size;
|
|
if (verbose)
|
|
printf ("guard_page_addr = 0x%lx\n", (unsigned long) guard_page_addr);
|
|
ret = mmap ((void *) guard_page_addr, page_size, PROT_NONE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
if (ret != (void *) guard_page_addr)
|
|
{
|
|
if (ret == MAP_FAILED)
|
|
perror ("mmap");
|
|
else
|
|
fprintf (stderr, "mmap() returned %p, expected 0x%lx\n",
|
|
ret, guard_page_addr);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
if (sigsetjmp (env, 1))
|
|
{
|
|
return_level = n;
|
|
return_bsp = bsp;
|
|
}
|
|
else
|
|
(*doit_pointer) (n + 1);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
struct sigaction sa;
|
|
stack_t ss;
|
|
|
|
if (argc > 1)
|
|
verbose = 1;
|
|
|
|
ss.ss_sp = malloc (2 * SIGSTKSZ);
|
|
if (ss.ss_sp == NULL)
|
|
{
|
|
puts ("failed to allocate alternate stack");
|
|
return EXIT_FAILURE;
|
|
}
|
|
ss.ss_flags = 0;
|
|
ss.ss_size = 2 * SIGSTKSZ;
|
|
if (sigaltstack (&ss, NULL) < 0)
|
|
{
|
|
printf ("sigaltstack failed: %s\n", strerror (errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
sa.sa_handler = (void (*) (int)) sighandler;
|
|
sigemptyset (&sa.sa_mask);
|
|
sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
|
|
if (sigaction (SIGSEGV, &sa, NULL) < 0)
|
|
{
|
|
printf ("sigaction failed: %s\n", strerror (errno));
|
|
exit (1);
|
|
}
|
|
|
|
doit (0);
|
|
|
|
if (verbose)
|
|
{
|
|
printf ("sigsetjmp returned at level %d bsp=0x%lx\n",
|
|
return_level, return_bsp);
|
|
puts ("Test succeeded!");
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|