* amd64-tdep.c (amd64_sigtramp_frame_sniffer): Rewrite to use new

sigtramp_p member of `struct gdbarch_tdep'.  Also check whether
the program counter is in the range specified by `struct
gdbarch_tdep'.
* amd64-linux-tdep.c: Include "symtab.h".
(amd64_linux_pc_in_sigtramp): Remove function.
(amd64_linux_sigtramp_p): New function.
(amd64_linux_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* amd64nbsd-tdep.c: Include "symtab.h".
(amd64nbsd_sigtramp_p): New function.
(amd64nbsd_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* amd64obsd-tdep.c: Include "symtab.h" and "objfiles.h".  Add a
few comments.
(amd64obsd_pc_in_sigtramp): Remove function.
(amd64obsd_sigtramp_p): New function.
(amd64obsd_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* i386-tdep.h (struct gdbarch_tdep): Add sigtramp_p member.
(i386bsd_pc_ins_sigtramp): Remove prototype.
(i386bsd_sigtramp_start, i386bsd_sigtramp_end): Remove prototypes.
* i386-tdep.c (i386_sigtramp_frame_sniffer): Rewrite to use new
sigtramp_p member of `struct gdbarch_tdep'.  Also check whether
the program counter is in the range specified by `struct
gdbarch_tdep'.
(i386_pc_in_sigtramp, i386_svr4_pc_in_sigtramp): Remove functions.
(i386_sigtramp_p, i386_svr4_sigtramp_p): New functions.
(i386_go32_pc_in_sigtramp): Remove function.
(i386_svr4_init_abi): Don't set deprecated_pc_in_sigtramp.
Initialize TDEP->sigtramp_p.
(i386_go32_init_abi): Initialize TDEP->sigtramp_p to NULL.
(i386_gdbarch_init): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* i386-linux-tdep.c: Adjust comments.
(i386_linux_pc_in_sigtramp): Remove function.
(i386_linux_sigtramp_p): New function.
(i386_linux_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* i386-nto-tdep.c: Update copyright year.
(i386nto_pc_in_sigtramp): Remove function.
(i386nto_sigtramp_p): New function.
(i386nto_sigcontext_addr): Use I386_ESP_REGNUM instead of
SP_REGNUM.
(i386nto_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* i386-sol2-tdep.c: Update copyright year.
(i386_sol2_pc_in_sigtramp): Remove function.
(i386_sol2_sigtramp_p): New function.
(i386_sol2_init_abi): Initialize TDEP->sigtramp_p.  Don't set
deprecated_pc_in_sigtramp.
* i386bsd-tdep.c (i386bsd_pc_in_sigtramp): Remove function.
(i386bsd_sigtramp_start, i386bsd_sigtramp_end): Remove functions.
(i386bsd_init_abi): Don't set deprecated_pc_in_sigtramp,
deprecated_sigtramp_start and deprecated_sigtramp_end.
* i386nbsd-tdep.c: Include "frame.h" and "symtab.h".
(i386nbsd_pc_in_sigtramp): Remove function.
(i386nbsd_sigtramp_p): New function.
(i386nbsd_init_abi): Don't set deprecated_pc_in_sigtramp,
deprecated_sigtramp_start, deprecated_sigtramp_end.  Initialize
TDEP->sigtramp_start, TDEP->sigtramp_end and TDEP->sigtramp_p.
* i386obsd-tdep.c: Include "frame.h", "symtab.h" and "objfiles.h".
(i386obsd_pc_in_sigtramp): Remove function.
(i386obsd_sigtramp_p): New function.
(i386obsd_sigtramp_start, i386obsd_sigtramp_end): Remove
functions.
(i386bsd_init_abi): Don't set deprecated_pc_in_sigtramp,
deprecated_sigtramp_start, deprecated_sigtramp_end.  Initialize
TDEP->sigtramp_p.
* Makefile.in (amd64-linux-tdep.o, amd64nbsd-tdep.o,
amd64obsd-tdep.o, i386nbsd-tdep.o, i386obsd-tdep.o): Update
dependencies.

1 files changed, 19 insertions, 39 deletions

diff --git a/gdb/i386obsd-tdep.c b/gdb/i386obsd-tdep.c
index 740bae3..17f2f5e 100644
--- a/gdb/i386obsd-tdep.c
+++ b/gdb/i386obsd-tdep.c
@@ -23,9 +23,12 @@
 
 #include "defs.h"
 #include "arch-utils.h"
+#include "frame.h"
 #include "gdbcore.h"
 #include "regcache.h"
 #include "regset.h"
+#include "symtab.h"
+#include "objfiles.h"
 #include "osabi.h"
 #include "target.h"
 
@@ -48,11 +51,13 @@
 /* Default page size.  */
 static const int i386obsd_page_size = 4096;
 
-/* Return whether PC is in an OpenBSD sigtramp routine.  */
+/* Return whether the frame preciding NEXT_FRAME corresponds to an
+   OpenBSD sigtramp routine.  */
 
 static int
-i386obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+i386obsd_sigtramp_p (struct frame_info *next_frame)
 {
+  CORE_ADDR pc = frame_pc_unwind (next_frame);
   CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
   const char sigreturn[] =
   {
@@ -60,13 +65,17 @@ i386obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
     0x67, 0x00, 0x00, 0x00,	/* movl $SYS_sigreturn, %eax */
     0xcd, 0x80			/* int $0x80 */
   };
-  char *buf;
+  char *name, *buf;
 
-  /* Avoid reading memory from the target if possible.  If we're in a
-     named function, we're certainly not in a sigtramp routine
-     provided by the kernel.  Take synthetic function names into
-     account though.  */
-  if (name && name[0] != '<')
+  /* If the function has a valid symbol name, it isn't a
+     trampoline.  */
+  find_pc_partial_function (pc, &name, NULL, NULL);
+  if (name != NULL)
+    return 0;
+
+  /* If the function lives in a valid section (even without a starting
+     point) it isn't a trampoline.  */
+  if (find_pc_section (pc) != NULL)
     return 0;
 
   /* If we can't read the instructions at START_PC, return zero.  */
@@ -78,34 +87,7 @@ i386obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
   if (memcmp (buf, sigreturn, sizeof sigreturn) == 0)
     return 1;
 
-  /* Check for a traditional BSD sigtramp routine.  */
-  return i386bsd_pc_in_sigtramp (pc, name);
-}
-
-/* Return the start address of the sigtramp routine.  */
-
-static CORE_ADDR
-i386obsd_sigtramp_start (CORE_ADDR pc)
-{
-  CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
-
-  if (i386bsd_pc_in_sigtramp (pc, NULL))
-    return i386bsd_sigtramp_start (pc);
-
-  return start_pc;
-}
-
-/* Return the end address of the sigtramp routine.  */
-
-static CORE_ADDR
-i386obsd_sigtramp_end (CORE_ADDR pc)
-{
-  CORE_ADDR start_pc = (pc & ~(i386obsd_page_size - 1));
-
-  if (i386bsd_pc_in_sigtramp (pc, NULL))
-    return i386bsd_sigtramp_end (pc);
-
-  return start_pc + 0x22;
+  return 0;
 }
 
 /* Mapping between the general-purpose registers in `struct reg'
@@ -215,9 +197,7 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   /* OpenBSD uses a different memory layout.  */
   tdep->sigtramp_start = i386obsd_sigtramp_start_addr;
   tdep->sigtramp_end = i386obsd_sigtramp_end_addr;
-  set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, i386obsd_pc_in_sigtramp);
-  set_gdbarch_deprecated_sigtramp_start (gdbarch, i386obsd_sigtramp_start);
-  set_gdbarch_deprecated_sigtramp_end (gdbarch, i386obsd_sigtramp_end);
+  tdep->sigtramp_p = i386obsd_sigtramp_p;
 
   /* OpenBSD has a `struct sigcontext' that's different from the
      original 4.3 BSD.  */