H . J . Lu hjl@lucon.org
Mon Jun 3 09:06:00 GMT 2002

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Here is a patch for readelf to support some dwarf3 output from gcc
3.1.1. I don't know how to handle DW_CFA_def_cfa_expression nor
DW_CFA_expression. Could someone please take a look at this?

Thanks.


H.J.
----
2002-06-03  H.J. Lu <hjl@gnu.org>

	* readelf.c (DW_CFA_GNU_args_size): Don't define.
	(DW_CFA_GNU_negative_offset_extended): Likewise.
	(DW_CFA_GNU_window_save): Likewise.
	(display_debug_frames): Handle DW_CFA_offset_extended_sf,
	DW_CFA_def_cfa_sf and DW_CFA_def_cfa_offset_sf.

--- binutils/readelf.c.dwarf3	Thu May 23 08:22:25 2002
+++ binutils/readelf.c	Mon Jun  3 09:00:06 2002
@@ -8461,15 +8461,20 @@ display_debug_frames (section, start, fi
 		case DW_CFA_def_cfa_offset:
 		  LEB ();
 		  break;
-#ifndef DW_CFA_GNU_args_size
-#define DW_CFA_GNU_args_size 0x2e
-#endif
+		case DW_CFA_offset_extended_sf:
+		  reg = LEB (); SLEB ();
+		  frame_need_space (fc, reg);
+		  fc->col_type[reg] = DW_CFA_undefined;
+		  break;
+		case DW_CFA_def_cfa_sf:
+		  LEB (); SLEB ();
+		  break;
+		case DW_CFA_def_cfa_offset_sf:
+		  SLEB ();
+		  break;
 		case DW_CFA_GNU_args_size:
 		  LEB ();
 		  break;
-#ifndef DW_CFA_GNU_negative_offset_extended
-#define DW_CFA_GNU_negative_offset_extended 0x2f
-#endif
 		case DW_CFA_GNU_negative_offset_extended:
 		  reg = LEB (); LEB ();
 		  frame_need_space (fc, reg);
@@ -8664,9 +8669,31 @@ display_debug_frames (section, start, fi
 		printf ("  DW_CFA_nop\n");
 	      break;
 
-#ifndef DW_CFA_GNU_window_save
-#define DW_CFA_GNU_window_save 0x2d
-#endif
+	    case DW_CFA_offset_extended_sf:
+	      reg = LEB ();
+	      l = SLEB ();
+	      frame_need_space (fc, reg);
+	      if (! do_debug_frames_interp)
+		printf ("  DW_CFA_offset_extended_sf: r%ld at cfa%+ld\n",
+			reg, l * fc->data_factor);
+	      fc->col_type[reg] = DW_CFA_offset;
+	      fc->col_offset[reg] = l * fc->data_factor;
+	      break;
+
+	    case DW_CFA_def_cfa_sf:
+	      fc->cfa_reg = LEB ();
+	      fc->cfa_offset = SLEB ();
+	      if (! do_debug_frames_interp)
+		printf ("  DW_CFA_def_cfa_sf: r%d ofs %d\n",
+			fc->cfa_reg, fc->cfa_offset);
+	      break;
+
+	    case DW_CFA_def_cfa_offset_sf:
+	      fc->cfa_offset = SLEB ();
+	      if (! do_debug_frames_interp)
+		printf ("  DW_CFA_def_cfa_offset_sf: %d\n", fc->cfa_offset);
+	      break;
+
 	    case DW_CFA_GNU_window_save:
 	      if (! do_debug_frames_interp)
 		printf ("  DW_CFA_GNU_window_save\n");

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