diff options
Diffstat (limited to 'arch/blackfin/kernel/signal.c')
| -rw-r--r-- | arch/blackfin/kernel/signal.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c index cb9d883d493c..dbc3bbf846be 100644 --- a/arch/blackfin/kernel/signal.c +++ b/arch/blackfin/kernel/signal.c @@ -42,6 +42,9 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) +/* Location of the trace bit in SYSCFG. */ +#define TRACE_BITS 0x0001 + struct fdpic_func_descriptor { unsigned long text; unsigned long GOT; @@ -225,6 +228,16 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info, regs->r1 = (unsigned long)(&frame->info); regs->r2 = (unsigned long)(&frame->uc); + /* + * Clear the trace flag when entering the signal handler, but + * notify any tracer that was single-stepping it. The tracer + * may want to single-step inside the handler too. + */ + if (regs->syscfg & TRACE_BITS) { + regs->syscfg &= ~TRACE_BITS; + ptrace_notify(SIGTRAP); + } + return 0; give_sigsegv: |