Re: Bug in powerpc gdb?

[Till Straumann <strauman@slac.stanford.edu>]

I also experienced problems with the stack unwinder
when using more recent gcc optimization. The attached
patch may help (I thought I had sent it to the GDB
site but am unable to find it in the database).

HTH
-- Till

(CC me for questions/comments, I'm not subscribed)

Patch against gdb-6.2.1. To apply, run
 
  patch -p0 < 'this_file'
 
from the gdb-6.2.1 topdir. It's always a good
idea to try with the '--dry-run' option first.
 
Provides:
        fixes a bug (triggered by newer gcc optimizations)
    in the rs6000/powerpc stack unwinder.
 
Prerequisites:
        n/a
 
 
Till Straumann, 3/14/2005
Index: gdb/rs6000-tdep.c
===================================================================
RCS file: /afs/slac/g/spear/cvsrep/tools/gdb/gdb/rs6000-tdep.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -c -r1.1.1.1 -r1.2
*** gdb/rs6000-tdep.c   10 Nov 2004 18:25:48 -0000      1.1.1.1
--- gdb/rs6000-tdep.c   10 Nov 2004 18:39:09 -0000      1.2
***************
*** 1184,1190 ****
             the search if we have no valid frame yet or if the return
             address is not yet saved in the frame.  */
          if (fdata->frameless == 0
!             && (lr_reg == -1 || fdata->nosavedpc == 0))
            break;
   
          if (op == 0x4e800020          /* blr */
--- 1184,1190 ----
             the search if we have no valid frame yet or if the return
             address is not yet saved in the frame.  */
          if (fdata->frameless == 0
!             && (lr_reg != -1 && fdata->nosavedpc == 0))
            break;
   
          if (op == 0x4e800020          /* blr */