X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fmips%2Fkernel%2Fsyscall.c;h=0080107aa4e9babdd0e5254a7c6867bc90e61b33;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=1fe08e9ca9b6e3c6e844fbc30097b9c0a5820e7c;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index 1fe08e9ca..0080107aa 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -7,7 +7,9 @@ * Copyright (C) 1999, 2000 Silicon Graphics, Inc. * Copyright (C) 2001 MIPS Technologies, Inc. */ +#include #include +#include #include #include #include @@ -26,13 +28,14 @@ #include #include #include +#include #include #include #include #include #include -#include +#include #include #include #include @@ -57,6 +60,8 @@ out: unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */ +EXPORT_SYMBOL(shm_align_mask); + #define COLOUR_ALIGN(addr,pgoff) \ ((((addr) + shm_align_mask) & ~shm_align_mask) + \ (((pgoff) << PAGE_SHIFT) & shm_align_mask)) @@ -158,7 +163,10 @@ asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { - return do_mmap2(addr, len, prot, flags, fd, pgoff); + if (pgoff & (~PAGE_MASK >> 12)) + return -EINVAL; + + return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); } save_static_function(sys_fork); @@ -174,14 +182,28 @@ _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); } @@ -194,12 +216,12 @@ asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs) int error; char * filename; - filename = getname((char *) (long)regs.regs[4]); + filename = getname((char __user *) (long)regs.regs[4]); error = PTR_ERR(filename); if (IS_ERR(filename)) goto out; - error = do_execve(filename, (char **) (long)regs.regs[5], - (char **) (long)regs.regs[6], ®s); + error = do_execve(filename, (char __user *__user *) (long)regs.regs[5], + (char __user *__user *) (long)regs.regs[6], ®s); putname(filename); out: @@ -209,7 +231,7 @@ out: /* * Compacrapability ... */ -asmlinkage int sys_uname(struct old_utsname * name) +asmlinkage int sys_uname(struct old_utsname __user * name) { if (name && !copy_to_user(name, vx_new_utsname(), sizeof (*name))) return 0; @@ -219,7 +241,7 @@ asmlinkage int sys_uname(struct old_utsname * name) /* * Compacrapability ... */ -asmlinkage int sys_olduname(struct oldold_utsname * name) +asmlinkage int sys_olduname(struct oldold_utsname __user * name) { int error; struct new_utsname *ptr; @@ -245,33 +267,21 @@ asmlinkage int sys_olduname(struct oldold_utsname * name) return error; } -asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) +void sys_set_thread_area(unsigned long addr) { - int tmp, len; - char *name; - - switch(cmd) { - case SETNAME: { - char nodename[__NEW_UTS_LEN + 1]; + struct thread_info *ti = task_thread_info(current); - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; + ti->tp_value = addr; - name = (char *) arg1; - - len = strncpy_from_user(nodename, name, __NEW_UTS_LEN); - if (len < 0) - return -EFAULT; + /* If some future MIPS implementation has this register in hardware, + * we will need to update it here (and in context switches). */ +} - down_write(&uts_sem); - strncpy(vx_new_uts(nodename), nodename, len); - nodename[__NEW_UTS_LEN] = '\0'; - strlcpy(vx_new_uts(nodename), nodename, - sizeof(vx_new_uts(nodename))); - up_write(&uts_sem); - return 0; - } +asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) +{ + int tmp; + switch(cmd) { case MIPS_ATOMIC_SET: printk(KERN_CRIT "How did I get here?\n"); return -EINVAL; @@ -284,9 +294,6 @@ asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) case FLUSH_CACHE: __flush_cache_all(); return 0; - - case MIPS_RDNVRAM: - return -EIO; } return -EINVAL; @@ -298,7 +305,7 @@ asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) * This is really horribly ugly. */ asmlinkage int sys_ipc (uint call, int first, int second, - unsigned long third, void *ptr, long fifth) + unsigned long third, void __user *ptr, long fifth) { int version, ret; @@ -307,24 +314,25 @@ asmlinkage int sys_ipc (uint call, int first, int second, switch (call) { case SEMOP: - return sys_semtimedop (first, (struct sembuf *)ptr, second, - NULL); + return sys_semtimedop (first, (struct sembuf __user *)ptr, + second, NULL); case SEMTIMEDOP: - return sys_semtimedop (first, (struct sembuf *)ptr, second, - (const struct timespec __user *)fifth); + return sys_semtimedop (first, (struct sembuf __user *)ptr, + second, + (const struct timespec __user *)fifth); case SEMGET: return sys_semget (first, second, third); case SEMCTL: { union semun fourth; if (!ptr) return -EINVAL; - if (get_user(fourth.__pad, (void **) ptr)) + if (get_user(fourth.__pad, (void __user *__user *) ptr)) return -EFAULT; return sys_semctl (first, second, third, fourth); } case MSGSND: - return sys_msgsnd (first, (struct msgbuf *) ptr, + return sys_msgsnd (first, (struct msgbuf __user *) ptr, second, third); case MSGRCV: switch (version) { @@ -334,7 +342,7 @@ asmlinkage int sys_ipc (uint call, int first, int second, return -EINVAL; if (copy_from_user(&tmp, - (struct ipc_kludge *) ptr, + (struct ipc_kludge __user *) ptr, sizeof (tmp))) return -EFAULT; return sys_msgrcv (first, tmp.msgp, second, @@ -342,35 +350,38 @@ asmlinkage int sys_ipc (uint call, int first, int second, } default: return sys_msgrcv (first, - (struct msgbuf *) ptr, + (struct msgbuf __user *) ptr, second, fifth, third); } case MSGGET: return sys_msgget ((key_t) first, second); case MSGCTL: - return sys_msgctl (first, second, (struct msqid_ds *) ptr); + return sys_msgctl (first, second, + (struct msqid_ds __user *) ptr); case SHMAT: switch (version) { default: { ulong raddr; - ret = do_shmat (first, (char *) ptr, second, &raddr); + ret = do_shmat (first, (char __user *) ptr, second, + &raddr); if (ret) return ret; - return put_user (raddr, (ulong *) third); + return put_user (raddr, (ulong __user *) third); } case 1: /* iBCS2 emulator entry point */ if (!segment_eq(get_fs(), get_ds())) return -EINVAL; - return do_shmat (first, (char *) ptr, second, (ulong *) third); + return do_shmat (first, (char __user *) ptr, second, + (ulong *) third); } case SHMDT: - return sys_shmdt ((char *)ptr); + return sys_shmdt ((char __user *)ptr); case SHMGET: return sys_shmget (first, second, third); case SHMCTL: return sys_shmctl (first, second, - (struct shmid_ds *) ptr); + (struct shmid_ds __user *) ptr); default: return -ENOSYS; }