diff options
Diffstat (limited to 'arch/arm64/kernel/sys_compat.c')
| -rw-r--r-- | arch/arm64/kernel/sys_compat.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c index 32653d156747..c832a5c24efc 100644 --- a/arch/arm64/kernel/sys_compat.c +++ b/arch/arm64/kernel/sys_compat.c @@ -58,7 +58,7 @@ do_compat_cache_op(unsigned long start, unsigned long end, int flags) if (end < start || flags) return -EINVAL; - if (!access_ok(VERIFY_READ, (const void __user *)start, end - start)) + if (!access_ok((const void __user *)start, end - start)) return -EFAULT; return __do_compat_cache_op(start, end); @@ -66,12 +66,11 @@ do_compat_cache_op(unsigned long start, unsigned long end, int flags) /* * Handle all unrecognised system calls. */ -long compat_arm_syscall(struct pt_regs *regs) +long compat_arm_syscall(struct pt_regs *regs, int scno) { - unsigned int no = regs->regs[7]; void __user *addr; - switch (no) { + switch (scno) { /* * Flush a region from virtual address 'r0' to virtual address 'r1' * _exclusive_. There is no alignment requirement on either address; @@ -102,12 +101,12 @@ long compat_arm_syscall(struct pt_regs *regs) default: /* - * Calls 9f00xx..9f07ff are defined to return -ENOSYS + * Calls 0xf0xxx..0xf07ff are defined to return -ENOSYS * if not implemented, rather than raising SIGILL. This * way the calling program can gracefully determine whether * a feature is supported. */ - if ((no & 0xffff) <= 0x7ff) + if (scno < __ARM_NR_COMPAT_END) return -ENOSYS; break; } @@ -116,6 +115,6 @@ long compat_arm_syscall(struct pt_regs *regs) (compat_thumb_mode(regs) ? 2 : 4); arm64_notify_die("Oops - bad compat syscall(2)", regs, - SIGILL, ILL_ILLTRP, addr, no); + SIGILL, ILL_ILLTRP, addr, scno); return 0; } |