diff options
| author | Todd Poynor <toddpoynor@google.com> | 2013-07-03 15:48:04 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:52:25 -0800 |
| commit | 699df5adbbfd0469ffde71e9608d8e819fbae5cf (patch) | |
| tree | d671bb2d3e4ee9737dda6ad777a5dff51f4f6599 | |
| parent | f8b0ad9d7bdd99952688c5317ec9b0bf254cf96b (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>
| -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 9232caee7060..f3c662299531 100644 --- a/arch/arm/kernel/kgdb.c +++ b/arch/arm/kernel/kgdb.c @@ -140,6 +140,8 @@ 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; @@ -147,6 +149,8 @@ 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); |