sh: syscall audit support.

Support syscall auditing..

Signed-off-by: Yuichi Nakamura <ynakam@hitachisoft.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 23 insertions, 6 deletions

diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index e0317ed080c3..397ac71d97f1 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -224,7 +224,7 @@ work_resched:
 syscall_exit_work:
         ! r0: current_thread_info->flags
         ! r8: current_thread_info
-        tst     #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP, r0
+        tst     #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | _TIF_SYSCALL_AUDIT, r0
         bt/s    work_pending
          tst    #_TIF_NEED_RESCHED, r0
 #ifdef CONFIG_TRACE_IRQFLAGS
@@ -234,6 +234,8 @@ syscall_exit_work:
 #endif
         sti
         ! XXX setup arguments...
+        mov     r15, r4
+        mov     #1, r5
         mov.l   4f, r0                  ! do_syscall_trace
         jsr     @r0
          nop
@@ -244,6 +246,8 @@ syscall_exit_work:
 syscall_trace_entry:
         !                       Yes it is traced.
         ! XXX setup arguments...
+        mov     r15, r4
+        mov     #0, r5
         mov.l   4f, r11         ! Call do_syscall_trace which notifies
         jsr     @r11            ! superior (will chomp R[0-7])
          nop
@@ -366,7 +370,7 @@ ENTRY(system_call)
         !
         get_current_thread_info r8, r10
         mov.l   @(TI_FLAGS,r8), r8
-        mov     #_TIF_SYSCALL_TRACE, r10
+        mov     #(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT), r10
         tst     r10, r8
         bf      syscall_trace_entry
         !
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index ac725f0aeb72..ce0664a58b49 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -6,7 +6,7 @@
  *      edited by Linus Torvalds
  *
  * SuperH version:   Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
- *
+ * Audit support: Yuichi Nakamura <ynakam@hitachisoft.jp>
  */
 #include <linux/kernel.h>
 #include <linux/sched.h>
@@ -19,6 +19,7 @@
 #include <linux/security.h>
 #include <linux/signal.h>
 #include <linux/io.h>
+#include <linux/audit.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -248,15 +249,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
         return ret;
 }
 
-asmlinkage void do_syscall_trace(void)
+asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
 {
         struct task_struct *tsk = current;
 
+        if (unlikely(current->audit_context) && entryexit)
+                audit_syscall_exit(AUDITSC_RESULT(regs->regs[0]),
+                                   regs->regs[0]);
+
         if (!test_thread_flag(TIF_SYSCALL_TRACE) &&
             !test_thread_flag(TIF_SINGLESTEP))
-                return;
+                goto out;
         if (!(tsk->ptrace & PT_PTRACED))
-                return;
+                goto out;
+
         /* the 0x80 provides a way for the tracing parent to distinguish
            between a syscall stop and SIGTRAP delivery */
         ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) &&
@@ -271,4 +277,11 @@ asmlinkage void do_syscall_trace(void)
                 send_sig(tsk->exit_code, tsk, 1);
                 tsk->exit_code = 0;
         }
+
+out:
+        if (unlikely(current->audit_context) && !entryexit)
+                audit_syscall_entry(AUDIT_ARCH_SH, regs->regs[3],
+                                    regs->regs[4], regs->regs[5],
+                                    regs->regs[6], regs->regs[7]);
+
 }