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| author | Paul Mundt <lethal@linux-sh.org> | 2009-12-28 11:53:47 +0300 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-12-28 11:53:47 +0300 |
| commit | 34d0b5af50a063cded842716633501b38ff815fb (patch) | |
| tree | c729b349fd43e40530a65d073a8476ff754b4b2d /arch/sh/kernel/hw_breakpoint.c | |
| parent | 22648735405f73299b717bb5933767e9a9c335ca (diff) | |
| download | linux-34d0b5af50a063cded842716633501b38ff815fb.tar.xz | |
sh: Convert ptrace to hw_breakpoint API.
This is the initial step for converting singlestep handling via ptrace
over to hw_breakpoints.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/hw_breakpoint.c')
| -rw-r--r-- | arch/sh/kernel/hw_breakpoint.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c index 022d8ed66bd6..c515a3ecf562 100644 --- a/arch/sh/kernel/hw_breakpoint.c +++ b/arch/sh/kernel/hw_breakpoint.c @@ -20,6 +20,7 @@ #include <linux/io.h> #include <asm/hw_breakpoint.h> #include <asm/mmu_context.h> +#include <asm/ptrace.h> struct ubc_context { unsigned long pc; @@ -372,7 +373,7 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args) rcu_read_unlock(); } - if (bp) { + if (bp && bp->overflow_handler != ptrace_triggered) { struct arch_hw_breakpoint *info = counter_arch_bp(bp); __raw_writel(UBC_CBR_CE | info->len | info->type, UBC_CBR0); @@ -387,9 +388,19 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args) BUILD_TRAP_HANDLER(breakpoint) { unsigned long ex = lookup_exception_vector(); + siginfo_t info; + int err; TRAP_HANDLER_DECL; - notify_die(DIE_BREAKPOINT, "breakpoint", regs, 0, ex, SIGTRAP); + err = notify_die(DIE_BREAKPOINT, "breakpoint", regs, 0, ex, SIGTRAP); + if (err == NOTIFY_STOP) + return; + + /* Deliver the signal to userspace */ + info.si_signo = SIGTRAP; + info.si_errno = 0; + info.si_code = TRAP_HWBKPT; + force_sig_info(SIGTRAP, &info, current); } /* |