* i386-sol2-tdep.c: Include "gdb_string.h".

(i386_sol2_sigtramp_p): Recognize signal trampoline based on its
name.
* Makefile.in (i386-sol2-tdep.o): Update dependencies.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2004-04-10  Mark Kettenis  <kettenis@gnu.org>
+
+	* i386-sol2-tdep.c: Include "gdb_string.h".
+	(i386_sol2_sigtramp_p): Recognize signal trampoline based on its
+	name.
+	* Makefile.in (i386-sol2-tdep.o): Update dependencies.
+
 2004-04-10  Mark Kettenis  <kettenis@gnu.org>
 
 	* i386-sol2-tdep.c: Include "solib-svr4.h".

gdb/Makefile.in

@@ -1877,7 +1877,7 @@ i386obsd-tdep.o: i386obsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
 	$(osabi_h) $(target_h) $(gdb_assert_h) $(gdb_string_h) \
 	$(i386_tdep_h) $(i387_tdep_h) $(solib_svr4_h)
 i386-sol2-tdep.o: i386-sol2-tdep.c $(defs_h) $(value_h) $(osabi_h) \
-	$(i386_tdep_h) $(solib_svr4_h)
+	$(gdb_string_h) $(i386_tdep_h) $(solib_svr4_h)
 i386-stub.o: i386-stub.c
 i386-tdep.o: i386-tdep.c $(defs_h) $(arch_utils_h) $(command_h) \
 	$(dummy_frame_h) $(dwarf2_frame_h) $(doublest_h) $(floatformat_h) \

gdb/i386-sol2-tdep.c

@@ -23,6 +23,8 @@
 #include "value.h"
 #include "osabi.h"
 
+#include "gdb_string.h"
+
 #include "i386-tdep.h"
 #include "solib-svr4.h"
 
@@ -47,14 +49,18 @@ static int i386_sol2_gregset_reg_offset[] =
   0 * 4				/* %gs */
 };
 
+/* Return whether the frame preceding NEXT_FRAME corresponds to a
+   Solaris sigtramp routine.  */
+
 static int
 i386_sol2_sigtramp_p (struct frame_info *next_frame)
 {
   CORE_ADDR pc = frame_pc_unwind (next_frame);
+  char *name;
 
-  /* Signal handler frames under Solaris 2 are recognized by a return
-     address of 0xffffffff.  */
-  return (pc == 0xffffffff);
+  find_pc_partial_function (pc, &name, NULL, NULL);
+  return (name && (strcmp ("sigacthandler", name) == 0
+		   || strcmp (name, "ucbsigvechandler") == 0));
 }
 
 /* Solaris doesn't have a `struct sigcontext', but it does have a