diff options
| author | Michael Ellerman <[email protected]> | 2022-09-28 01:04:19 +1000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2022-09-28 22:21:17 +1000 |
| commit | 19c95df1277c48e3ef8cc7d9f1d315dce949f203 (patch) | |
| tree | 0dfee4971c1834b178609419101e322581ff6891 | |
| parent | bbd71709087a9d486d1da42399eec14e106072f2 (diff) | |
powerpc: Reverse stack frame marker on little endian
On little endian the stack frame marker appears reversed when dumping
memory sequentially, as is typical in xmon or gdb, eg:
c000000004733e40 0000000000000000 0000000000000000 |................|
c000000004733e50 0000000000000000 0000000000000000 |................|
c000000004733e60 0000000000000000 0000000000000000 |................|
c000000004733e70 5347455200000000 0000000000000000 |SGER............|
c000000004733e80 a700000000000000 708897f7ff7f0000 |........p.......|
c000000004733e90 0073428fff7f0000 208997f7ff7f0000 |.sB..... .......|
c000000004733ea0 0100000000000000 ffffffffffffffff |................|
c000000004733eb0 0000000000000000 0000000000000000 |................|
To make it easier to recognise, reverse the value on little endian, so
it always appears as "REGS", eg:
c000000004733e70 5245475300000000 0000000000000000 |REGS............|
Acked-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
| -rw-r--r-- | arch/powerpc/include/asm/ptrace.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index 6c23d1d25dc7..2efec6d87049 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -99,7 +99,12 @@ struct pt_regs #define STACK_FRAME_WITH_PT_REGS (STACK_FRAME_OVERHEAD + sizeof(struct pt_regs)) +// Always displays as "REGS" in memory dumps +#ifdef CONFIG_CPU_BIG_ENDIAN #define STACK_FRAME_REGS_MARKER ASM_CONST(0x52454753) +#else +#define STACK_FRAME_REGS_MARKER ASM_CONST(0x53474552) +#endif #ifdef __powerpc64__ |