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-rw-r--r--arch/mips/kernel/scall32-o32.S5
-rw-r--r--arch/mips/kernel/scall64-o32.S12
2 files changed, 6 insertions, 11 deletions
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index 759f68066b5d..34a4dbd76f24 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -262,14 +262,11 @@ bad_alignment:
LEAF(sys_syscall)
subu t0, a0, __NR_O32_Linux # check syscall number
sltiu v0, t0, __NR_O32_Linux_syscalls + 1
+ beqz t0, einval # do not recurse
sll t1, t0, 3
beqz v0, einval
-
lw t2, sys_call_table(t1) # syscall routine
- li v1, 4000 - __NR_O32_Linux # index of sys_syscall
- beq t0, v1, einval # do not recurse
-
/* Some syscalls like execve get their arguments from struct pt_regs
and claim zero arguments in the syscall table. Thus we have to
assume the worst case and shuffle around all potential arguments.
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 6c7ef8313ebd..facb41a76d1b 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -174,14 +174,12 @@ not_o32_scall:
END(handle_sys)
LEAF(sys32_syscall)
- sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
+ subu t0, a0, __NR_O32_Linux # check syscall number
+ sltiu v0, t0, __NR_O32_Linux_syscalls + 1
+ beqz t0, einval # do not recurse
+ dsll t1, t0, 3
beqz v0, einval
-
- dsll v0, a0, 3
- ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
-
- li v1, 4000 # indirect syscall number
- beq a0, v1, einval # do not recurse
+ ld t2, sys_call_table(t1) # syscall routine
move a0, a1 # shift argument registers
move a1, a2