[RFA] Dwarf2 fix

[Michal Ludvig <mludvig@suse.cz>]

Hi all,
this simple patch mysteriously solves problems that we have had on 
x86-64 with stack unwinding. Can I commit? I believe so :-)

2002-05-13  Michal Ludvig  <mludvig@suse.cz>
         * dwarf2cfi.c (context_cpy): Copy registers correctly.
         (update_context): Use __func__ in notes.

Index: dwarf2cfi.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2cfi.c,v
retrieving revision 1.4
diff -c -3 -p -r1.4 dwarf2cfi.c
*** dwarf2cfi.c 7 May 2002 11:22:54 -0000       1.4
--- dwarf2cfi.c 13 May 2002 16:24:00 -0000
*************** static void
*** 318,325 ****
--- 318,329 ----
   context_cpy (struct context *dst, struct context *src)
   {
     int regs_size = sizeof (struct context_reg) * NUM_REGS;
+   struct context_reg *dreg;

+   dreg = dst->reg;
     *dst = *src;
+   dst->reg = dreg;
+
     memcpy (dst->reg, src->reg, regs_size);
   }
   ^L
*************** update_context (struct context *context,
*** 1301,1307 ****
               orig_context->reg[fs->regs.reg[i].loc.reg].loc.addr;
           default:
             internal_error (__FILE__, __LINE__,
!              "cfi_update_context: unknown register rule");
           }
         break;
         case REG_SAVED_EXP:
--- 1305,1311 ----
               orig_context->reg[fs->regs.reg[i].loc.reg].loc.addr;
           default:
             internal_error (__FILE__, __LINE__,
!              "%s: unknown register rule", __func__);
           }
         break;
         case REG_SAVED_EXP:
*************** update_context (struct context *context,
*** 1319,1326 ****
         break;
         default:
         internal_error (__FILE__, __LINE__,
!          "cfi_update_context: unknown register rule");
!
         }
     get_reg ((char *) &context->ra, context, fs->retaddr_column);
     unwind_tmp_obstack_free ();
--- 1323,1329 ----
         break;
         default:
         internal_error (__FILE__, __LINE__,
!          "%s: unknown register rule", __func__);
         }
     get_reg ((char *) &context->ra, context, fs->retaddr_column);
     unwind_tmp_obstack_free ();


Michal Ludvig
-- 
* SuSE CR, s.r.o     * mludvig@suse.cz
* +420 2 9654 5373   * http://www.suse.cz