diff options
Diffstat (limited to 'arch/mips/kernel/syscall.c')
| -rw-r--r-- | arch/mips/kernel/syscall.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index 8fde242596f..ee98eeb65e8 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -7,6 +7,7 @@ * Copyright (C) 1999, 2000 Silicon Graphics, Inc. * Copyright (C) 2001 MIPS Technologies, Inc. */ +#include <linux/config.h> #include <linux/a.out.h> #include <linux/errno.h> #include <linux/linkage.h> @@ -176,14 +177,28 @@ _sys_clone(nabi_no_regargs struct pt_regs regs) { unsigned long clone_flags; unsigned long newsp; - int *parent_tidptr, *child_tidptr; + int __user *parent_tidptr, *child_tidptr; clone_flags = regs.regs[4]; newsp = regs.regs[5]; if (!newsp) newsp = regs.regs[29]; - parent_tidptr = (int *) regs.regs[6]; - child_tidptr = (int *) regs.regs[7]; + parent_tidptr = (int __user *) regs.regs[6]; +#ifdef CONFIG_32BIT + /* We need to fetch the fifth argument off the stack. */ + child_tidptr = NULL; + if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) { + int __user *__user *usp = (int __user *__user *) regs.regs[29]; + if (regs.regs[2] == __NR_syscall) { + if (get_user (child_tidptr, &usp[5])) + return -EFAULT; + } + else if (get_user (child_tidptr, &usp[4])) + return -EFAULT; + } +#else + child_tidptr = (int __user *) regs.regs[8]; +#endif return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr); } @@ -245,6 +260,16 @@ asmlinkage int sys_olduname(struct oldold_utsname * name) return error; } +void sys_set_thread_area(unsigned long addr) +{ + struct thread_info *ti = current->thread_info; + + ti->tp_value = addr; + + /* If some future MIPS implementation has this register in hardware, + * we will need to update it here (and in context switches). */ +} + asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) { int tmp, len; |