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authorPaul Mundt <lethal@linux-sh.org>2010-02-15 06:17:45 +0100
committerPaul Mundt <lethal@linux-sh.org>2010-02-15 06:17:45 +0100
commit4b505db9c4c72dbd2a8e66b8d681640101325af6 (patch)
treeedf6aed9194684935e8f88b9501ae3f4ed33f54d
parentLinux 2.6.33-rc8 (diff)
downloadlinux-4b505db9c4c72dbd2a8e66b8d681640101325af6.tar.xz
linux-4b505db9c4c72dbd2a8e66b8d681640101325af6.zip
sh64: fix tracing of signals.
This follows the parisc change to ensure that tracehook_signal_handler() is aware of when we are single-stepping in order to ptrace_notify() appropriately. While this was implemented for 32-bit SH, sh64 neglected to make use of TIF_SINGLESTEP when it was folded in with the 32-bit code, resulting in ptrace_notify() never being called. As sh64 uses all of the other abstractions already, this simply plugs in the thread flag in the appropriate enable/disable paths and fixes up the tracehook notification accordingly. With this in place, sh64 is brought in line with what 32-bit is already doing. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--arch/sh/kernel/ptrace_64.c11
-rw-r--r--arch/sh/kernel/signal_64.c4
2 files changed, 12 insertions, 3 deletions
diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c
index 873ebdc4f98e..b063eb8b18e3 100644
--- a/arch/sh/kernel/ptrace_64.c
+++ b/arch/sh/kernel/ptrace_64.c
@@ -133,6 +133,8 @@ void user_enable_single_step(struct task_struct *child)
struct pt_regs *regs = child->thread.uregs;
regs->sr |= SR_SSTEP; /* auto-resetting upon exception */
+
+ set_tsk_thread_flag(child, TIF_SINGLESTEP);
}
void user_disable_single_step(struct task_struct *child)
@@ -140,6 +142,8 @@ void user_disable_single_step(struct task_struct *child)
struct pt_regs *regs = child->thread.uregs;
regs->sr &= ~SR_SSTEP;
+
+ clear_tsk_thread_flag(child, TIF_SINGLESTEP);
}
static int genregs_get(struct task_struct *target,
@@ -454,6 +458,8 @@ asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs)
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
{
+ int step;
+
if (unlikely(current->audit_context))
audit_syscall_exit(AUDITSC_RESULT(regs->regs[9]),
regs->regs[9]);
@@ -461,8 +467,9 @@ asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_exit(regs, regs->regs[9]);
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
+ step = test_thread_flag(TIF_SINGLESTEP);
+ if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, step);
}
/* Called with interrupts disabled */
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index ce76dbdef294..580e97d46ca5 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -118,7 +118,9 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
* clear the TS_RESTORE_SIGMASK flag.
*/
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- tracehook_signal_handler(signr, &info, &ka, regs, 0);
+
+ tracehook_signal_handler(signr, &info, &ka, regs,
+ test_thread_flag(TIF_SINGLESTEP));
return 1;
}
}