* i386-tdep.c (i386_analyze_stack_align): Add handling of two

        other possible code sequences that perform a stack realignment.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5bf4c15fecad00216a893e03c17e2edb15ff3b8e..675206d6a859eb6bdbed66edaa9ef3b44cd78e14 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2006-12-31  Joel Brobecker  <brobecker@adacore.com>
+
+       * i386-tdep.c (i386_analyze_stack_align): Add handling of two
+       other possible code sequences that perform a stack realignment.
+
 2006-12-31  Mark Kettenis  <kettenis@gnu.org>
 
        * sparc64-tdep.h (SPARC64_PSTATE_AG, SPARC64_PSTATE_IE) 

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 3099bf85abf2e780c83e6895ee0f5cedf8341be0..705e3f32887fc140871acb3d2897a1aad347289a 100644 (file)
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -497,15 +497,27 @@ static CORE_ADDR
 i386_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc,
                          struct i386_frame_cache *cache)
 {
-  static const gdb_byte insns[10] = { 
+  static const gdb_byte insns_ecx[10] = { 
     0x8d, 0x4c, 0x24, 0x04,    /* leal  4(%esp), %ecx */
     0x83, 0xe4, 0xf0,          /* andl  $-16, %esp */
     0xff, 0x71, 0xfc           /* pushl -4(%ecx) */
   };
+  static const gdb_byte insns_edx[10] = { 
+    0x8d, 0x54, 0x24, 0x04,    /* leal  4(%esp), %edx */
+    0x83, 0xe4, 0xf0,          /* andl  $-16, %esp */
+    0xff, 0x72, 0xfc           /* pushl -4(%edx) */
+  };
+  static const gdb_byte insns_eax[10] = { 
+    0x8d, 0x44, 0x24, 0x04,    /* leal  4(%esp), %eax */
+    0x83, 0xe4, 0xf0,          /* andl  $-16, %esp */
+    0xff, 0x70, 0xfc           /* pushl -4(%eax) */
+  };
   gdb_byte buf[10];
 
   if (target_read_memory (pc, buf, sizeof buf)
-      || memcmp (buf, insns, sizeof buf) != 0)
+      || (memcmp (buf, insns_ecx, sizeof buf) != 0
+          && memcmp (buf, insns_edx, sizeof buf) != 0
+          && memcmp (buf, insns_eax, sizeof buf) != 0))
     return pc;
 
   if (current_pc > pc + 4)