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-rw-r--r--arch/mips/kernel/scall64-n32.S14
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 71f99d5f7a06..9c0b387d6427 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -42,9 +42,6 @@ NESTED(handle_sysn32, PT_SIZE, sp)
#endif
beqz t0, not_n32_scall
- dsll t0, v0, 3 # offset into table
- ld t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
-
sd a3, PT_R26(sp) # save a3 for syscall restarting
li t1, _TIF_WORK_SYSCALL_ENTRY
@@ -53,6 +50,9 @@ NESTED(handle_sysn32, PT_SIZE, sp)
bnez t0, n32_syscall_trace_entry
syscall_common:
+ dsll t0, v0, 3 # offset into table
+ ld t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
+
jalr t2 # Do The Real Thing (TM)
li t0, -EMAXERRNO - 1 # error?
@@ -71,21 +71,25 @@ syscall_common:
n32_syscall_trace_entry:
SAVE_STATIC
- move s0, t2
move a0, sp
move a1, v0
jal syscall_trace_enter
bltz v0, 1f # seccomp failed? Skip syscall
- move t2, s0
RESTORE_STATIC
+ ld v0, PT_R2(sp) # Restore syscall (maybe modified)
ld a0, PT_R4(sp) # Restore argument registers
ld a1, PT_R5(sp)
ld a2, PT_R6(sp)
ld a3, PT_R7(sp)
ld a4, PT_R8(sp)
ld a5, PT_R9(sp)
+
+ dsubu t2, v0, __NR_N32_Linux # check (new) syscall number
+ sltiu t0, t2, __NR_N32_Linux_syscalls + 1
+ beqz t0, not_n32_scall
+
j syscall_common
1: j syscall_exit