lkml.org 
[lkml]   [2007]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH x86/mm 07/11] x86 ptrace merge syscall trace
Date

This moves the 64-bit syscall tracing functions into ptrace.c,
so that ptrace_64.c becomes entirely obsolete.

Signed-off-by: Roland McGrath <roland@redhat.com>
---
arch/x86/kernel/ptrace.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index f4355f3..2eac631 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -632,6 +632,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
return ret;
}

+#ifdef CONFIG_X86_32
+
void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)
{
struct siginfo info;
@@ -729,3 +731,65 @@ out:
audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
return 1;
}
+
+#else /* CONFIG_X86_64 */
+
+static void syscall_trace(struct pt_regs *regs)
+{
+
+#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;
+ }
+}
+
+asmlinkage void syscall_trace_enter(struct pt_regs *regs)
+{
+ /* do the secure computing check first */
+ secure_computing(regs->orig_ax);
+
+ if (test_thread_flag(TIF_SYSCALL_TRACE)
+ && (current->ptrace & PT_PTRACED))
+ syscall_trace(regs);
+
+ if (unlikely(current->audit_context)) {
+ if (test_thread_flag(TIF_IA32)) {
+ audit_syscall_entry(AUDIT_ARCH_I386,
+ regs->orig_ax,
+ regs->bx, regs->cx,
+ regs->dx, regs->si);
+ } else {
+ audit_syscall_entry(AUDIT_ARCH_X86_64,
+ regs->orig_ax,
+ regs->di, regs->si,
+ regs->dx, regs->r10);
+ }
+ }
+}
+
+asmlinkage void syscall_trace_leave(struct pt_regs *regs)
+{
+ if (unlikely(current->audit_context))
+ audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
+
+ if ((test_thread_flag(TIF_SYSCALL_TRACE)
+ || test_thread_flag(TIF_SINGLESTEP))
+ && (current->ptrace & PT_PTRACED))
+ syscall_trace(regs);
+}
+
+#endif /* CONFIG_X86_32 */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2007-11-29 13:05    [W:1.198 / U:0.320 seconds]
©2003-2014 Jasper Spaans. Advertise on this site