[S390] ptrace changes

[linux-2.6-omap-h63xx.git] / arch / s390 / kernel / ptrace.c

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index c8b08289eb87e1d78c9c92996fe7bbfe30c16645..1f31be1ecc4bd57bd3af99ef004f00df4f24987b 100644 (file)
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -35,6 +35,7 @@
 #include <linux/signal.h>
 #include <linux/elf.h>
 #include <linux/regset.h>
+#include <linux/tracehook.h>
 
 #include <asm/segment.h>
 #include <asm/page.h>
@@ -639,40 +640,44 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 }
 #endif
 
-asmlinkage void
-syscall_trace(struct pt_regs *regs, int entryexit)
+asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 {
-       if (unlikely(current->audit_context) && entryexit)
-               audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]), regs->gprs[2]);
-
-       if (!test_thread_flag(TIF_SYSCALL_TRACE))
-               goto out;
-       if (!(current->ptrace & PT_PTRACED))
-               goto out;
-       ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-                                ? 0x80 : 0));
+       long ret;
 
        /*
-        * If the debuffer has set an invalid system call number,
-        * we prepare to skip the system call restart handling.
+        * The sysc_tracesys code in entry.S stored the system
+        * call number to gprs[2].
         */
-       if (!entryexit && regs->gprs[2] >= NR_syscalls)
+       ret = regs->gprs[2];
+       if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+           (tracehook_report_syscall_entry(regs) ||
+            regs->gprs[2] >= NR_syscalls)) {
+               /*
+                * Tracing decided this syscall should not happen or the
+                * debugger stored an invalid system call number. Skip
+                * the system call and the system call restart handling.
+                */
                regs->trap = -1;
-
-       /*
-        * this isn't the same as continuing with a signal, but it will do
-        * for normal use.  strace only continues with a signal if the
-        * stopping signal is not SIGTRAP.  -brl
-        */
-       if (current->exit_code) {
-               send_sig(current->exit_code, current, 1);
-               current->exit_code = 0;
+               ret = -1;
        }
- out:
-       if (unlikely(current->audit_context) && !entryexit)
-               audit_syscall_entry(test_thread_flag(TIF_31BIT)?AUDIT_ARCH_S390:AUDIT_ARCH_S390X,
-                                   regs->gprs[2], regs->orig_gpr2, regs->gprs[3],
-                                   regs->gprs[4], regs->gprs[5]);
+
+       if (unlikely(current->audit_context))
+               audit_syscall_entry(test_thread_flag(TIF_31BIT) ?
+                                       AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
+                                   regs->gprs[2], regs->orig_gpr2,
+                                   regs->gprs[3], regs->gprs[4],
+                                   regs->gprs[5]);
+       return ret;
+}
+
+asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
+{
+       if (unlikely(current->audit_context))
+               audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]),
+                                  regs->gprs[2]);
+
+       if (test_thread_flag(TIF_SYSCALL_TRACE))
+               tracehook_report_syscall_exit(regs, 0);
 }
 
 /*