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-rw-r--r--arch/mips/kernel/scall64-o32.S33
1 files changed, 17 insertions, 16 deletions
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index d3c2616cba..7a5abb73e5 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -79,6 +79,22 @@ loads_done:
PTR_WD load_a7, bad_stack_a7
.previous
+ /*
+ * absolute syscall number is in v0 unless we called syscall(__NR_###)
+ * where the real syscall number is in a0
+ * note: NR_syscall is the first O32 syscall but the macro is
+ * only defined when compiling with -mabi=32 (CONFIG_32BIT)
+ * therefore __NR_O32_Linux is used (4000)
+ */
+
+ subu t2, v0, __NR_O32_Linux
+ bnez t2, 1f /* __NR_syscall at offset 0 */
+ LONG_S a0, TI_SYSCALL($28) # Save a0 as syscall number
+ b 2f
+1:
+ LONG_S v0, TI_SYSCALL($28) # Save v0 as syscall number
+2:
+
li t1, _TIF_WORK_SYSCALL_ENTRY
LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
and t0, t1, t0
@@ -113,22 +129,7 @@ trace_a_syscall:
sd a7, PT_R11(sp) # For indirect syscalls
move a0, sp
- /*
- * absolute syscall number is in v0 unless we called syscall(__NR_###)
- * where the real syscall number is in a0
- * note: NR_syscall is the first O32 syscall but the macro is
- * only defined when compiling with -mabi=32 (CONFIG_32BIT)
- * therefore __NR_O32_Linux is used (4000)
- */
- .set push
- .set reorder
- subu t1, v0, __NR_O32_Linux
- move a1, v0
- bnez t1, 1f /* __NR_syscall at offset 0 */
- ld a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
- .set pop
-
-1: jal syscall_trace_enter
+ jal syscall_trace_enter
bltz v0, 1f # seccomp failed? Skip syscall