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(x86_64_local_resume): Fix missing "H" typo.

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2004/11/30 22:44:47-08:00 mostang.com!davidm
(my_rt_sigreturn): New function.
(x86_64_local_resume): Use my_rt_sigreturn().  The normal sigreturn()
	does nothing (returns with an error).

2004/11/23 18:01:09-08:00 mostang.com!davidm
(x86_64_local_resume): Provide a minimal implementation (a la x86).
(establish_machine_state): Fix off-by-one error.

(Logical change 1.290)
This commit is contained in:
hp.com!davidm 2005-05-03 09:13:17 +00:00
parent 5d8b2e3415
commit a9cad72ed4
1 changed files with 44 additions and 2 deletions
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46
src/x86_64/Gresume.c
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@ -31,10 +31,52 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#ifndef UNW_REMOTE_ONLY #ifndef UNW_REMOTE_ONLY
#include <sys/syscall.h>
/* sigreturn() is a no-op on x86_64 glibc. */
static NORETURN inline long
my_rt_sigreturn (void *new_sp)
{
__asm__ __volatile__ ("mov %0, %%rsp;"
"mov %1, %%rax;"
"syscall"
:: "r"(new_sp), "i"(SYS_rt_sigreturn)
: "memory");
abort ();
}
HIDDEN inline int HIDDEN inline int
x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg) x86_64_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 x86-64, 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 != X86_64_SCF_NONE))
{
struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
(unsigned long long) c->dwarf.ip, sc);
my_rt_sigreturn (sc);
}
else
{
Debug (8, "resuming at ip=%llx via setcontext()\n",
(unsigned long long) c->dwarf.ip);
setcontext (uc);
}
#else
# warning Implement me! # warning Implement me!
#endif
return -UNW_EINVAL;
} }
#endif /* !UNW_REMOTE_ONLY */ #endif /* !UNW_REMOTE_ONLY */
@ -60,9 +102,9 @@ establish_machine_state (struct cursor *c)
Debug (8, "copying out cursor state\n"); Debug (8, "copying out cursor state\n");
for (reg = 0; reg < UNW_REG_LAST; ++reg) for (reg = 0; reg <= UNW_REG_LAST; ++reg)
{ {
Debug (8, "copying %s %d\n", unw_regname (reg), reg); Debug (16, "copying %s %d\n", unw_regname (reg), reg);
if (unw_is_fpreg (reg)) if (unw_is_fpreg (reg))
{ {
if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0) if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0)