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authorRoland McGrath <roland@redhat.com>2008-07-27 16:49:50 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-28 16:30:49 +1000
commit6558ba2b5cc3a2f22039db30616fcd07c1b28ac8 (patch)
treeca54768376c6b32a308cc728a72ebcb978e3f179 /arch/powerpc/kernel
parente2075f79a99b45a6cc10de021c93f07212098a84 (diff)
powerpc: Call tracehook_signal_handler() when setting up signal frames
This makes the powerpc signal handling code call tracehook_signal_handler() after a handler is set up. This means that using PTRACE_SINGLESTEP to enter a signal handler will report to ptrace on the first instruction of the handler, instead of the second. This is consistent with what x86 and other machines do, and what users and debuggers want. BenH: Fixed up the test for the trap value. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/signal.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 2b5eaa6c8f3..e74aa0ed4e9 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -9,7 +9,7 @@
* this archive for more details.
*/
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
#include <linux/signal.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -177,6 +177,12 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
* its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
*/
current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;
+
+ /*
+ * Let tracing know that we've done the handler setup.
+ */
+ tracehook_signal_handler(signr, &info, &ka, regs,
+ test_thread_flag(TIF_SINGLESTEP));
}
return ret;