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-rw-r--r--arch/mips/kernel/scall32-o32.S24
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index a5b14f48e1af..fdc70b400442 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -6,6 +6,7 @@
* Copyright (C) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
* Copyright (C) 2001 MIPS Technologies, Inc.
* Copyright (C) 2004 Thiemo Seufer
+ * Copyright (C) 2014 Imagination Technologies Ltd.
*/
#include <linux/errno.h>
#include <asm/asm.h>
@@ -74,10 +75,10 @@ NESTED(handle_sys, PT_SIZE, sp)
.set noreorder
.set nomacro
-1: lw t5, 16(t0) # argument #5 from usp
-4: lw t6, 20(t0) # argument #6 from usp
-3: lw t7, 24(t0) # argument #7 from usp
-2: lw t8, 28(t0) # argument #8 from usp
+1: user_lw(t5, 16(t0)) # argument #5 from usp
+4: user_lw(t6, 20(t0)) # argument #6 from usp
+3: user_lw(t7, 24(t0)) # argument #7 from usp
+2: user_lw(t8, 28(t0)) # argument #8 from usp
sw t5, 16(sp) # argument #5 to ksp
sw t6, 20(sp) # argument #6 to ksp
@@ -118,7 +119,18 @@ syscall_trace_entry:
SAVE_STATIC
move s0, t2
move a0, sp
- jal syscall_trace_enter
+
+ /*
+ * syscall number is in v0 unless we called syscall(__NR_###)
+ * where the real syscall number is in a0
+ */
+ addiu a1, v0, __NR_O32_Linux
+ bnez v0, 1f /* __NR_syscall at offset 0 */
+ lw a1, PT_R4(sp)
+
+1: jal syscall_trace_enter
+
+ bltz v0, 2f # seccomp failed? Skip syscall
move t0, s0
RESTORE_STATIC
@@ -138,7 +150,7 @@ syscall_trace_entry:
sw t1, PT_R0(sp) # save it for syscall restarting
1: sw v0, PT_R2(sp) # result
- j syscall_exit
+2: j syscall_exit
/* ------------------------------------------------------------------------ */