From: Mark Kettenis <kettenis@gnu.org>
Date: Mon, 18 Aug 2003 17:14:16 +0000 (+0000)
Subject: * i386-tdep.c (i386_analyze_register_saves): Handle register saves
X-Git-Tag: gdb_6_0-2003-10-04-release~98
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=42a131713b077e31dacf463f3559ea173f751086;p=thirdparty%2Fbinutils-gdb.git

* i386-tdep.c (i386_analyze_register_saves): Handle register saves
at the start of a frameless function.  This probably fixes PR
backtrace/1338.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b3ca723fc73..8a0467ef0d5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2003-08-18  Mark Kettenis  <kettenis@gnu.org>
+
+	* i386-tdep.c (i386_analyze_register_saves): Handle register saves
+	at the start of a frameless function.  This probably fixes PR
+	backtrace/1338.
+
 2003-08-18  Michal Ludvig  <mludvig@suse.cz>
 
 	* config/i386/nm-x86-64linux.h (LINUX_CHILD_POST_STARTUP_INFERIOR):
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 8017cfcc07a..6cf4f947ebd 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -571,23 +571,22 @@ static CORE_ADDR
 i386_analyze_register_saves (CORE_ADDR pc, CORE_ADDR current_pc,
 			     struct i386_frame_cache *cache)
 {
-  if (cache->locals >= 0)
-    {
-      CORE_ADDR offset;
-      unsigned char op;
-      int i;
+  CORE_ADDR offset = 0;
+  unsigned char op;
+  int i;
 
-      offset = - 4 - cache->locals;
-      for (i = 0; i < 8 && pc < current_pc; i++)
-	{
-	  op = read_memory_unsigned_integer (pc, 1);
-	  if (op < 0x50 || op > 0x57)
-	    break;
+  if (cache->locals > 0)
+    offset -= cache->locals;
+  for (i = 0; i < 8 && pc < current_pc; i++)
+    {
+      op = read_memory_unsigned_integer (pc, 1);
+      if (op < 0x50 || op > 0x57)
+	break;
 
-	  cache->saved_regs[op - 0x50] = offset;
-	  offset -= 4;
-	  pc++;
-	}
+      offset -= 4;
+      cache->saved_regs[op - 0x50] = offset;
+      cache->sp_offset += 4;
+      pc++;
     }
 
   return pc;