diff options
| -rw-r--r-- | arch/mips/kernel/scall32-o32.S | 5 | ||||
| -rw-r--r-- | arch/mips/kernel/scall64-o32.S | 12 |
2 files changed, 6 insertions, 11 deletions
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S index 759f68066b5..34a4dbd76f2 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 6c7ef8313eb..facb41a76d1 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 |