Attachment 160208 Details for Bug 250024 – Fix - port of the amd64 frameless handling for i386.

[patch] Fix - port of the amd64 frameless handling for i386.

gdb-6.6-i386-frameless.patch (text/plain), 1.08 KB, created by Jan Kratochvil on 2007-07-29 23:10:05 UTC

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Creator: Jan Kratochvil

Created: 2007-07-29 23:10:05 UTC

Size: 1.08 KB

patch

obsolete

>--- ./gdb/i386-tdep.c	18 Jun 2007 17:45:26 -0000	1.238
>+++ ./gdb/i386-tdep.c	29 Jul 2007 22:43:44 -0000
>@@ -943,8 +943,23 @@ i386_frame_cache (struct frame_info *nex
>      They (usually) share their frame pointer with the frame that was
>      in progress when the signal occurred.  */
> 
>-  frame_unwind_register (next_frame, I386_EBP_REGNUM, buf);
>-  cache->base = extract_unsigned_integer (buf, 4);
>+  if (cache->locals < 0)
>+    {
>+      /* We didn't find a valid frame.  If we're at the start of a
>+	 function, or somewhere half-way its prologue, the function's
>+	 frame probably hasn't been fully setup yet.  Try to
>+	 reconstruct the base address for the stack frame by looking
>+	 at the stack pointer.  For truly "frameless" functions this
>+	 might work too.  */
>+      frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
>+      cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset;
>+    }
>+  else
>+    {
>+      frame_unwind_register (next_frame, I386_EBP_REGNUM, buf);
>+      cache->base = extract_unsigned_integer (buf, 4);
>+    }
>+
>   if (cache->base == 0)
>     return cache;
>

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Attachments on bug 250024: 160208