From: Daniel Jacobowitz <drow@false.org>
Date: Fri, 8 Apr 2005 12:10:21 +0000 (+0000)
Subject: 	* dwarf2-frame.c (struct dwarf2_frame_cache): New field
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0228dfb97d58a54af8758840101975bf92903133;p=binutils-gdb.git

	* dwarf2-frame.c (struct dwarf2_frame_cache): New field
	undefined_retaddr.
	(dwarf2_frame_cache): Initialize undefined_retaddr.
	(dwarf2_frame_this_id): Return an invalid frame ID if
	undefined_retaddr.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 30abadcff15..af02d972f22 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2005-04-08  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* dwarf2-frame.c (struct dwarf2_frame_cache): New field
+	undefined_retaddr.
+	(dwarf2_frame_cache): Initialize undefined_retaddr.
+	(dwarf2_frame_this_id): Return an invalid frame ID if
+	undefined_retaddr.
+
 2005-04-05  Jim Blandy  <jimb@redhat.com>
 
 	Move construction of IA-32 vector types to i386-tdep.c.
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c
index 1ac18598e64..22b8ae6f2f5 100644
--- a/gdb/dwarf2-frame.c
+++ b/gdb/dwarf2-frame.c
@@ -610,6 +610,9 @@ struct dwarf2_frame_cache
   /* DWARF Call Frame Address.  */
   CORE_ADDR cfa;
 
+  /* Set if the return address column was marked as undefined.  */
+  int undefined_retaddr;
+
   /* Saved registers, indexed by GDB register number, not by DWARF
      register number.  */
   struct dwarf2_frame_state_reg *reg;
@@ -791,6 +794,10 @@ incomplete CFI data; unspecified registers (e.g., %s) at 0x%s"),
       }
   }
 
+  if (fs->retaddr_column < fs->regs.num_regs
+      && fs->regs.reg[fs->retaddr_column].how == DWARF2_FRAME_REG_UNDEFINED)
+    cache->undefined_retaddr = 1;
+
   do_cleanups (old_chain);
 
   *this_cache = cache;
@@ -804,6 +811,9 @@ dwarf2_frame_this_id (struct frame_info *next_frame, void **this_cache,
   struct dwarf2_frame_cache *cache =
     dwarf2_frame_cache (next_frame, this_cache);
 
+  if (cache->undefined_retaddr)
+    return;
+
   (*this_id) = frame_id_build (cache->cfa, frame_func_unwind (next_frame));
 }