m2-internship/libunwind-eh_elf
1
0
Fork 0
mirror of https://github.com/tobast/libunwind-eh_elf.git synced 2025-02-02 12:52:53 +01:00
Code Issues Releases Activity

Remove obsolete code for 'old way' of handling x86-64 signal frames.

Browse source
This commit is contained in:
Lassi Tuura 2010-04-20 23:13:16 +02:00 committed by Arun Sharma
parent f252f5ff4e
commit 92cc7fd78a
1 changed files with 0 additions and 53 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
src/x86_64/Gos-linux.c
View file

@ -82,31 +82,6 @@ unw_is_signal_frame (unw_cursor_t *cursor)
{ {
struct cursor *c = (struct cursor *) cursor; struct cursor *c = (struct cursor *) cursor;
return c->sigcontext_format != X86_64_SCF_NONE; return c->sigcontext_format != X86_64_SCF_NONE;
#if 0
unw_word_t w0, w1, ip;
unw_addr_space_t as;
unw_accessors_t *a;
void *arg;
int ret;
as = c->dwarf.as;
a = unw_get_accessors (as);
arg = c->dwarf.as_arg;
/* Check if RIP points at sigreturn sequence.
on x86_64 Linux that is (see libc.so):
48 c7 c0 0f 00 00 00 mov $0xf,%rax
0f 05 syscall
66 data16
*/
ip = c->dwarf.ip;
if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
|| (ret = (*a->access_mem) (as, ip + 8, &w1, 0, arg)) < 0)
return 0;
w1 &= 0xff;
return (w0 == 0x0f0000000fc0c748 && w1 == 0x05);
#endif
} }
PROTECTED int PROTECTED int
@ -123,34 +98,6 @@ unw_handle_signal_frame (unw_cursor_t *cursor)
assert(c->sigcontext_format == X86_64_SCF_LINUX_RT_SIGFRAME); assert(c->sigcontext_format == X86_64_SCF_LINUX_RT_SIGFRAME);
assert(c->sigcontext_addr == c->dwarf.cfa); assert(c->sigcontext_addr == c->dwarf.cfa);
assert(0); assert(0);
#if 0
struct dwarf_loc rsp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSP, 0);
ret = dwarf_get (&c->dwarf, rsp_loc, &c->dwarf.cfa);
if (ret < 0)
{
Debug (2, "returning %d\n", ret);
return ret;
}
c->dwarf.loc[RAX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RAX, 0);
c->dwarf.loc[RDX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RDX, 0);
c->dwarf.loc[RCX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RCX, 0);
c->dwarf.loc[RBX] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RBX, 0);
c->dwarf.loc[RSI] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSI, 0);
c->dwarf.loc[RDI] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RDI, 0);
c->dwarf.loc[RBP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RBP, 0);
c->dwarf.loc[RSP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RSP, 0);
c->dwarf.loc[ R8] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
c->dwarf.loc[ R9] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
c->dwarf.loc[R10] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
c->dwarf.loc[R11] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
c->dwarf.loc[R12] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
c->dwarf.loc[R13] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
c->dwarf.loc[R14] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
c->dwarf.loc[R15] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
c->dwarf.loc[RIP] = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_RIP, 0);
#endif
return 1; return 1;
} }