linux-unwind.h (ppc_fallback_frame_state): Point saved CR2 offset to low 32 bits…

linux-unwind.h (ppc_fallback_frame_state): Point saved CR2 offset to low 32 bits of regs->ccr rather than the whole 64-bit...

	* config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Point
	saved CR2 offset to low 32 bits of regs->ccr rather than the whole
	64-bit register in 64-bit libgcc.

From-SVN: r129520

gcc/ChangeLog

+2007-10-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Point
+	saved CR2 offset to low 32 bits of regs->ccr rather than the whole
+	64-bit register in 64-bit libgcc.
+
 2007-10-20  Eric B. Weddington  <eweddington@cso.atmel.com>
 
 	* config/avr/avr.c (avr_mcu_types): Add at90pwm2b, at90pwm3b.

gcc/config/rs6000/linux-unwind.h

@@ -250,7 +250,10 @@ ppc_fallback_frame_state (struct _Unwind_Context *context,
       }
 
   fs->regs.reg[R_CR2].how = REG_SAVED_OFFSET;
-  fs->regs.reg[R_CR2].loc.offset = (long) &regs->ccr - new_cfa;
+  /* CR? regs are always 32-bit and PPC is big-endian, so in 64-bit
+     libgcc loc.offset needs to point to the low 32 bits of regs->ccr.  */
+  fs->regs.reg[R_CR2].loc.offset = (long) &regs->ccr - new_cfa
+				   + sizeof (long) - 4;
 
   fs->regs.reg[R_LR].how = REG_SAVED_OFFSET;
   fs->regs.reg[R_LR].loc.offset = (long) &regs->link - new_cfa;