# HG changeset patch
# User jlarmour
# Date 1047094759 0
# Node ID c9e9d41631746731ca02b4f8ce46475a6cfa6bc6
# Parent  ca97f6817edac9da9e457769468d46ed39c1fd31
	* include/hal_arch.h (HAL_THREAD_INIT_CONTEXT): Initialize
	what would be FP and LR in the previous stack frame to make
	GDB backtraces happy.

diff --git a/packages/hal/powerpc/arch/current/ChangeLog b/packages/hal/powerpc/arch/current/ChangeLog
--- a/packages/hal/powerpc/arch/current/ChangeLog
+++ b/packages/hal/powerpc/arch/current/ChangeLog
@@ -1,3 +1,9 @@
+2003-03-08  Jonathan Larmour  <jifl@eCosCentric.com>
+
+	* include/hal_arch.h (HAL_THREAD_INIT_CONTEXT): Initialize
+	what would be FP and LR in the previous stack frame to make
+	GDB backtraces happy.
+
 2003-01-03  Gary Thomas  <gary@mlbassoc.com>
 
 	* include/hal_mem.h (CYGARC_MEMDESC_NOCACHE_PA): New macro which
diff --git a/packages/hal/powerpc/arch/current/include/hal_arch.h b/packages/hal/powerpc/arch/current/include/hal_arch.h
--- a/packages/hal/powerpc/arch/current/include/hal_arch.h
+++ b/packages/hal/powerpc/arch/current/include/hal_arch.h
@@ -144,6 +144,8 @@ externC void cyg_hal_deliver_exception( 
                                  - CYGARC_PPC_STACK_FRAME_SIZE;               \
     register HAL_SavedRegisters *_regs_;                                      \
     int _i_;                                                                  \
+    ((CYG_WORD *)_sp_)[0] = 0;            /* Zero old FP and LR for EABI */   \
+    ((CYG_WORD *)_sp_)[1] = 0;            /* to make GDB backtraces sane */   \
     _regs_ = (HAL_SavedRegisters *)((_sp_) - sizeof(HAL_SavedRegisters));     \
     for( _i_ = 0; _i_ < 32; _i_++ ) (_regs_)->d[_i_] = (_id_)|_i_;            \
     (_regs_)->d[01] = (CYG_WORD)(_sp_);        /* SP = top of stack      */   \