mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-26 00:57:39 +01:00
(unw_resume): Reject attempts to resume execution at IP 0.
2004/12/02 18:37:47-08:00 hp.com!davidm (my_rt_sigreturn): New function. 2004/12/02 00:40:45-08:00 mostang.com!davidm (Logical change 1.290)
This commit is contained in:
hp.com!davidm
parent
39ec1bd6dc
commit
f9b8ba0d47
1 changed files with 145 additions and 0 deletions
145
src/hppa/Gresume.c
Normal file
145
src/hppa/Gresume.c
Normal file
|
|
@ -0,0 +1,145 @@
|
|||
/* libunwind - a platform-independent unwind library
|
||||
Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
|
||||
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
||||
|
||||
This file is part of libunwind.
|
||||
|
||||
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 <stdlib.h>
|
||||
|
||||
#include "unwind_i.h"
|
||||
|
||||
#ifndef UNW_REMOTE_ONLY
|
||||
|
||||
#if defined(__linux)
|
||||
|
||||
# include <sys/syscall.h>
|
||||
|
||||
static NORETURN inline long
|
||||
my_rt_sigreturn (void *new_sp, int in_syscall)
|
||||
{
|
||||
register unsigned long r25 __asm__ ("r25") = (in_syscall != 0);
|
||||
register unsigned long r20 __asm__ ("r20") = SYS_rt_sigreturn;
|
||||
|
||||
__asm__ __volatile__ ("copy %0, %%sp\n"
|
||||
"be,l 0x100(%%sr2,%%r0),%%sr0,%%r31\n"
|
||||
"nop"
|
||||
:
|
||||
: "r"(new_sp), "r"(r20), "r"(r25)
|
||||
: "memory");
|
||||
abort ();
|
||||
}
|
||||
|
||||
#endif /* __linux */
|
||||
|
||||
HIDDEN inline int
|
||||
hppa_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
|
||||
{
|
||||
#if defined(__linux)
|
||||
struct cursor *c = (struct cursor *) cursor;
|
||||
ucontext_t *uc = c->dwarf.as_arg;
|
||||
|
||||
/* Ensure c->pi is up-to-date. On PA-RISC, it's relatively common to be
|
||||
missing DWARF unwind info. We don't want to fail in that case,
|
||||
because the frame-chain still would let us do a backtrace at
|
||||
least. */
|
||||
dwarf_make_proc_info (&c->dwarf);
|
||||
|
||||
if (unlikely (c->sigcontext_format != HPPA_SCF_NONE))
|
||||
{
|
||||
struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
|
||||
|
||||
Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
|
||||
my_rt_sigreturn (sc, (sc->sc_flags & PARISC_SC_FLAG_IN_SYSCALL) != 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
|
||||
setcontext (uc);
|
||||
}
|
||||
#else
|
||||
# warning Implement me!
|
||||
#endif
|
||||
return -UNW_EINVAL;
|
||||
}
|
||||
|
||||
#endif /* !UNW_REMOTE_ONLY */
|
||||
|
||||
/* This routine is responsible for copying the register values in
|
||||
cursor C and establishing them as the current machine state. */
|
||||
|
||||
static inline int
|
||||
establish_machine_state (struct cursor *c)
|
||||
{
|
||||
int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *,
|
||||
int write, void *);
|
||||
int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *,
|
||||
int write, void *);
|
||||
unw_addr_space_t as = c->dwarf.as;
|
||||
void *arg = c->dwarf.as_arg;
|
||||
unw_fpreg_t fpval;
|
||||
unw_word_t val;
|
||||
int reg;
|
||||
|
||||
access_reg = as->acc.access_reg;
|
||||
access_fpreg = as->acc.access_fpreg;
|
||||
|
||||
Debug (8, "copying out cursor state\n");
|
||||
|
||||
for (reg = 0; reg <= UNW_REG_LAST; ++reg)
|
||||
{
|
||||
Debug (16, "copying %s %d\n", unw_regname (reg), reg);
|
||||
if (unw_is_fpreg (reg))
|
||||
{
|
||||
if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)
|
||||
(*access_fpreg) (as, reg, &fpval, 1, arg);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (tdep_access_reg (c, reg, &val, 0) >= 0)
|
||||
(*access_reg) (as, reg, &val, 1, arg);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
PROTECTED int
|
||||
unw_resume (unw_cursor_t *cursor)
|
||||
{
|
||||
struct cursor *c = (struct cursor *) cursor;
|
||||
int ret;
|
||||
|
||||
Debug (1, "(cursor=%p)\n", c);
|
||||
|
||||
if (!c->dwarf.ip)
|
||||
{
|
||||
/* This can happen easily when the frame-chain gets truncated
|
||||
due to bad or missing unwind-info. */
|
||||
Debug (1, "refusing to resume execution at address 0\n");
|
||||
return -UNW_EINVAL;
|
||||
}
|
||||
|
||||
if ((ret = establish_machine_state (c)) < 0)
|
||||
return ret;
|
||||
|
||||
return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c,
|
||||
c->dwarf.as_arg);
|
||||
}
|
||||
Loading…
Reference in a new issue