mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-23 16:07:37 +01:00
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2001-2002 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. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unwind.h>
|
|
|
|
#define panic(args...) \
|
|
{ fprintf (stderr, args); exit (-1); }
|
|
|
|
static void
|
|
init_state (unw_context_t *ucp)
|
|
{
|
|
int i;
|
|
|
|
ucp->uc_mcontext.sc_flags = 0;
|
|
|
|
ucp->uc_mcontext.sc_ar_ccv = random ();
|
|
ucp->uc_mcontext.sc_ar_lc = random ();
|
|
ucp->uc_mcontext.sc_pr = random ();
|
|
|
|
#if 0
|
|
ucp->uc_mcontext.sc_ip = xxx;
|
|
ucp->uc_mcontext.sc_cfm = xxx;
|
|
ucp->uc_mcontext.sc_um = xxx;
|
|
ucp->uc_mcontext.sc_ar_rsc = xxx;
|
|
ucp->uc_mcontext.sc_ar_bsp = xxx;
|
|
ucp->uc_mcontext.sc_ar_rnat = xxx;
|
|
ucp->uc_mcontext.sc_ar_unat = xxx;
|
|
ucp->uc_mcontext.sc_ar_fpsr = xxx;
|
|
ucp->uc_mcontext.sc_ar_pfs = xxx;
|
|
#endif
|
|
|
|
/* initialize static registers without trashing gp (r1), sp (r12),
|
|
or tp (r13). */
|
|
for (i = 2; i < 32; ++i)
|
|
{
|
|
if (i != 12 && i != 13)
|
|
{
|
|
ucp->uc_mcontext.sc_gr[i] = random ();
|
|
ucp->uc_mcontext.sc_nat |= (random () & 1) << i;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/* initialize stacked registers: */
|
|
for (i = 32; i < 128; ++i)
|
|
{
|
|
xxx;
|
|
}
|
|
#endif
|
|
|
|
for (i = 0; i < 8; ++i)
|
|
ucp->uc_mcontext.sc_br[i] = random ();
|
|
|
|
for (i = 0; i < 128; ++i)
|
|
{
|
|
ucp->uc_mcontext.sc_fr[i].u.bits[0] = random ();
|
|
ucp->uc_mcontext.sc_fr[i].u.bits[0] = random ();
|
|
}
|
|
#if 0
|
|
ucp->uc_mcontext.sc_rbs_base = xxx;
|
|
ucp->uc_mcontext.sc_loadrs = xxx;
|
|
ucp->uc_mcontext.sc_ar25 = xxx;
|
|
ucp->uc_mcontext.sc_ar26 = xxx;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
check_state (ucontext_t *orig_state, unw_cursor_t *c)
|
|
{
|
|
unw_word_t val;
|
|
|
|
unw_get_reg (c, UNW_REG_IP, &val);
|
|
printf ("IP: orig=%016lx now=%016lx\n", orig_state->uc_mcontext.sc_ip, val);
|
|
}
|
|
|
|
static void
|
|
setup_context (ucontext_t *unwind_ucp)
|
|
{
|
|
asm volatile ("mov ar.fpsr = %0" :: "r"(0x9804c8a70033f));
|
|
|
|
init_state (unwind_ucp);
|
|
setcontext (unwind_ucp);
|
|
}
|
|
|
|
static void
|
|
check (ucontext_t *unwind_ucp, ucontext_t *setup_ucp,
|
|
void (*doit) (ucontext_t *))
|
|
{
|
|
swapcontext (unwind_ucp, setup_ucp);
|
|
(*doit) (unwind_ucp);
|
|
}
|
|
|
|
static void
|
|
test1 (ucontext_t *orig_state)
|
|
{
|
|
unw_cursor_t cursor;
|
|
ucontext_t uc;
|
|
|
|
getcontext (&uc);
|
|
if (unw_init_local (&cursor, &uc) < 0)
|
|
panic ("unw_init_local failed\n");
|
|
|
|
if (unw_step (&cursor) < 0)
|
|
panic ("unw_step failed\n");
|
|
|
|
check_state (orig_state, &cursor);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
ucontext_t unwind_uc, setup_uc;
|
|
unsigned char stack_mem[256*1024];
|
|
|
|
setup_uc.uc_stack.ss_sp = stack_mem;
|
|
setup_uc.uc_stack.ss_flags = 0;
|
|
setup_uc.uc_stack.ss_size = sizeof (stack_mem);
|
|
makecontext (&setup_uc, (void (*) (void)) setup_context,
|
|
2, &setup_uc, &unwind_uc);
|
|
check (&unwind_uc, &setup_uc, test1);
|
|
return 0;
|
|
}
|