diff options
| author | Todd Poynor <toddpoynor@google.com> | 2013-07-03 15:48:04 -0700 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-21 22:35:20 -0500 |
| commit | bdb6d63cec80f92d8455b58495dd791fd3981a3a (patch) | |
| tree | ddc78c5d150e56395e654012f78a548927cbf1b3 /arch | |
| parent | 0e5754b8493a44a8d3e85e60b25ec4565606d561 (diff) | |
ARM: kgdb: ignore breakpoint instructions from user mode
Avoid conflicts with user mode usage of the same instructions, as with
Clang -ftrapv.
Change-Id: I12d1c6d8f94376bfd2503cb0be843d7e478fb6ea
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/kgdb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c index 778c2f7024ff..b321c8fbb87d 100644 --- a/arch/arm/kernel/kgdb.c +++ b/arch/arm/kernel/kgdb.c @@ -144,6 +144,8 @@ int kgdb_arch_handle_exception(int exception_vector, int signo, static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr) { + if (user_mode(regs)) + return -1; kgdb_handle_exception(1, SIGTRAP, 0, regs); return 0; @@ -151,6 +153,8 @@ static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr) static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr) { + if (user_mode(regs)) + return -1; compiled_break = 1; kgdb_handle_exception(1, SIGTRAP, 0, regs); |