Commit 663276b7 authored by Kumar Gala's avatar Kumar Gala Committed by Paul Mackerras
Browse files

[POWERPC] Set lower flag bits in regs->trap to indicate debug level exception 



We use the low bits of regs->trap as flag bits.  We already indicate
critical and machine check level exceptions via this mechanism.  Extend it
to indicate debug level exceptions.

Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 7a10174e

arch/powerpc/kernel/head_booke.h

+1 −1
Original line number Diff line number Diff line
@@ -272,7 +272,7 @@ 
	/* continue normal handling for a critical exception... */	      \

2:	mfspr	r4,SPRN_DBSR;						      \

	addi	r3,r1,STACK_FRAME_OVERHEAD;				      \

	EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)

	EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)



#define DEBUG_CRIT_EXCEPTION						      \

	START_EXCEPTION(DebugCrit);					      \

include/asm-powerpc/ptrace.h

+1 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ extern int ptrace_put_reg(struct task_struct *task, int regno, 
#ifndef __powerpc64__

#define IS_CRITICAL_EXC(regs)	(((regs)->trap & 2) != 0)

#define IS_MCHECK_EXC(regs)	(((regs)->trap & 4) != 0)

#define IS_DEBUG_EXC(regs)	(((regs)->trap & 8) != 0)

#endif /* ! __powerpc64__ */

#define TRAP(regs)		((regs)->trap & ~0xF)

#ifdef __powerpc64__