From: Julian Seward <jseward@acm.org>
Date: Fri, 12 Jan 2007 19:21:22 +0000 (+0000)
Subject: Handle DW_CFA_undefined (produced by PathScale 2.4 on amd64-linux)
X-Git-Tag: svn/VALGRIND_3_3_0~427
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20ce1d0a81fa42330f4266065b5914a04a346e83;p=thirdparty%2Fvalgrind.git

Handle DW_CFA_undefined (produced by PathScale 2.4 on amd64-linux)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6510
---

diff --git a/coregrind/m_debuginfo/readdwarf.c b/coregrind/m_debuginfo/readdwarf.c
index fcd2f771f3..9288df0b5c 100644
--- a/coregrind/m_debuginfo/readdwarf.c
+++ b/coregrind/m_debuginfo/readdwarf.c
@@ -2224,6 +2224,16 @@ static Int run_CF_instruction ( /*MOD*/UnwindContext* ctx,
          ctx->cfa_offset = off * ctx->data_a_f;
          break;
 
+      case DW_CFA_undefined:
+         reg = read_leb128( &instr[i], &nleb, 0);
+         i += nleb;
+         if (reg < 0 || reg >= N_CFI_REGS) 
+            return 0; /* fail */
+         ctx->reg[reg].tag = RR_Undef;
+         ctx->reg[reg].coff = 0;
+         ctx->reg[reg].reg = 0;
+         break;
+
       case DW_CFA_GNU_args_size:
          /* No idea what is supposed to happen.  gdb-6.3 simply
             ignores these. */