x86: tracehook syscall

This changes x86 syscall tracing to use the new tracehook.h entry points.
There is no change, only cleanup.

Signed-off-by: Roland McGrath <roland@redhat.com>

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index e37dccc..19a7d2c 100644 (file)
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -14,6 +14,7 @@
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/regset.h>
+#include <linux/tracehook.h>
 #include <linux/user.h>
 #include <linux/elf.h>
 #include <linux/security.h>
@@ -1375,30 +1376,6 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)
        force_sig_info(SIGTRAP, &info, tsk);
 }
 
-static void syscall_trace(struct pt_regs *regs)
-{
-       if (!(current->ptrace & PT_PTRACED))
-               return;
-
-#if 0
-       printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",
-              current->comm,
-              regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),
-              current_thread_info()->flags, current->ptrace);
-#endif
-
-       ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-                               ? 0x80 : 0));
-       /*
-        * 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;
-       }
-}
 
 #ifdef CONFIG_X86_32
 # define IS_IA32       1
@@ -1432,8 +1409,9 @@ asmregparm long syscall_trace_enter(struct pt_regs *regs)
        if (unlikely(test_thread_flag(TIF_SYSCALL_EMU)))
                ret = -1L;
 
-       if (ret || test_thread_flag(TIF_SYSCALL_TRACE))
-               syscall_trace(regs);
+       if ((ret || test_thread_flag(TIF_SYSCALL_TRACE)) &&
+           tracehook_report_syscall_entry(regs))
+               ret = -1L;
 
        if (unlikely(current->audit_context)) {
                if (IS_IA32)
@@ -1459,7 +1437,7 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs)
                audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
 
        if (test_thread_flag(TIF_SYSCALL_TRACE))
-               syscall_trace(regs);
+               tracehook_report_syscall_exit(regs, 0);
 
        /*
         * If TIF_SYSCALL_EMU is set, we only get here because of
@@ -1475,6 +1453,6 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs)
         * system call instruction.
         */
        if (test_thread_flag(TIF_SINGLESTEP) &&
-           (current->ptrace & PT_PTRACED))
+           tracehook_consider_fatal_signal(current, SIGTRAP, SIG_DFL))
                send_sigtrap(current, regs, 0);
 }