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

1 files changed, 0 insertions, 53 deletions

diff --git a/src/x86_64/Gos-linux.c b/src/x86_64/Gos-linux.c
index 8337fa55..e2929beb 100644
--- a/src/x86_64/Gos-linux.c
+++ b/src/x86_64/Gos-linux.c
@@ -82,31 +82,6 @@ unw_is_signal_frame (unw_cursor_t *cursor)
 {
   struct cursor *c = (struct cursor *) cursor;
   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
@@ -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_addr == c->dwarf.cfa);
   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;
 }