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powerpc: Fix kgdb on little endian ppc64le

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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>
This commit is contained in:
Balbir Singh
2016-02-01 17:03:25 +11:00
committed by Michael Ellerman
parent e4f226b158
commit 94e3d92359
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/kernel/kgdb.c
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@@ -445,7 +445,11 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code,
* Global data * Global data
*/ */
struct kgdb_arch arch_kgdb_ops = { struct kgdb_arch arch_kgdb_ops = {
#ifdef __LITTLE_ENDIAN__
.gdb_bpt_instr = {0x08, 0x10, 0x82, 0x7d},
#else
.gdb_bpt_instr = {0x7d, 0x82, 0x10, 0x08}, .gdb_bpt_instr = {0x7d, 0x82, 0x10, 0x08},
#endif
}; };
static int kgdb_not_implemented(struct pt_regs *regs) static int kgdb_not_implemented(struct pt_regs *regs)