Commit 94e3d923 authored Feb 01, 2016 by Balbir Singh Committed by Michael Ellerman Feb 18, 2016

powerpc: Fix kgdb on little endian ppc64le



I spent some time trying to use kgdb and debugged my inability to
resume from kgdb_handle_breakpoint(). NIP is not incremented
and that leads to a loop in the debugger.

I've tested this lightly on a virtual instance with KDB enabled.
After the patch, I am able to get the "go" command to work as
expected.

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent e4f226b1

arch/powerpc/kernel/kgdb.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -445,7 +445,11 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code,
		* Global data
		*/
		struct kgdb_arch arch_kgdb_ops = {
		#ifdef __LITTLE_ENDIAN__
		.gdb_bpt_instr = {0x08, 0x10, 0x82, 0x7d},
		#else
		.gdb_bpt_instr = {0x7d, 0x82, 0x10, 0x08},
		#endif
		};

		static int kgdb_not_implemented(struct pt_regs *regs)