PATCH: Also check for `movl %esp, %ebp' for x32

["H.J. Lu" <hongjiu.lu@intel.com>]

Hi,

X32 may use `movl %esp, %ebp' in prologue.  This patch checks it for
x32.  Tested on Linux/x86-64.  OK for trunk?

Thanks.


H.J.
--
	* amd64-tdep.c (amd64_analyze_prologue): Also check for
	`movl %esp, %ebp' if it is an x32 target.

diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index d15acea..e64de21 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -1900,10 +1927,14 @@ amd64_analyze_prologue (struct gdbarch *gdbarch,
       if (current_pc <= pc + 1)
         return current_pc;
 
-      /* Check for `movq %rsp, %rbp'.  */
+      /* Check for `movq %rsp, %rbp'.  Also check for `movl %esp, %ebp'
+	 if it is an x32 target.  */
       read_memory (pc + 1, buf, 3);
       if (memcmp (buf, mov_rsp_rbp_1, 3) != 0
-	  && memcmp (buf, mov_rsp_rbp_2, 3) != 0)
+	  && memcmp (buf, mov_rsp_rbp_2, 3) != 0
+	  && (gdbarch_ptr_bit (gdbarch) == 64
+	      || (memcmp (buf, mov_rsp_rbp_1 + 1, 2) != 0
+		  && memcmp (buf, mov_rsp_rbp_2 + 1, 2) != 0)))
 	return pc + 1;
 
       /* OK, we actually have a frame.  */