#include <linux/shm.h>
#include <linux/compiler.h>
#include <linux/module.h>
+#include <linux/ipc.h>
#include <asm/branch.h>
#include <asm/cachectl.h>
#include <asm/cacheflush.h>
-#include <asm/ipc.h>
#include <asm/asm-offsets.h>
#include <asm/signal.h>
#include <asm/sim.h>
#include <asm/sysmips.h>
#include <asm/uaccess.h>
-asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
+/*
+ * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
+ * convention. It returns results in registers $v0 / $v1 which means there
+ * is no need for it to do verify the validity of a userspace pointer
+ * argument. Historically that used to be expensive in Linux. These days
+ * the performance advantage is negligible.
+ */
+asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
{
int fd[2];
int error, res;
task_size = STACK_TOP;
+ if (len > task_size)
+ return -ENOMEM;
+
if (flags & MAP_FIXED) {
+ /* Even MAP_FIXED mappings must reside within task_size. */
+ if (task_size - len < addr)
+ return -EINVAL;
+
/*
* We do not accept a shared mapping if it would violate
* cache aliasing constraints.
return addr;
}
- if (len > task_size)
- return -ENOMEM;
do_color_align = 0;
if (filp || (flags & MAP_SHARED))
do_color_align = 1;
if (!name)
return -EFAULT;
- if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+ if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
return -EFAULT;
error = __copy_to_user(&name->sysname, &utsname()->sysname,
*
* This is really horribly ugly.
*/
-asmlinkage int sys_ipc (unsigned int call, int first, int second,
- unsigned long third, void __user *ptr, long fifth)
+asmlinkage int sys_ipc(unsigned int call, int first, int second,
+ unsigned long third, void __user *ptr, long fifth)
{
int version, ret;
switch (call) {
case SEMOP:
- return sys_semtimedop (first, (struct sembuf __user *)ptr,
- second, NULL);
+ return sys_semtimedop(first, (struct sembuf __user *)ptr,
+ second, NULL);
case SEMTIMEDOP:
- return sys_semtimedop (first, (struct sembuf __user *)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);
+ return sys_semget(first, second, third);
case SEMCTL: {
union semun fourth;
if (!ptr)
return -EINVAL;
if (get_user(fourth.__pad, (void __user *__user *) ptr))
return -EFAULT;
- return sys_semctl (first, second, third, fourth);
+ return sys_semctl(first, second, third, fourth);
}
case MSGSND:
- return sys_msgsnd (first, (struct msgbuf __user *) ptr,
- second, third);
+ return sys_msgsnd(first, (struct msgbuf __user *) ptr,
+ second, third);
case MSGRCV:
switch (version) {
case 0: {
if (copy_from_user(&tmp,
(struct ipc_kludge __user *) ptr,
- sizeof (tmp)))
+ sizeof(tmp)))
return -EFAULT;
- return sys_msgrcv (first, tmp.msgp, second,
- tmp.msgtyp, third);
+ return sys_msgrcv(first, tmp.msgp, second,
+ tmp.msgtyp, third);
}
default:
- return sys_msgrcv (first,
- (struct msgbuf __user *) ptr,
- second, fifth, third);
+ return sys_msgrcv(first,
+ (struct msgbuf __user *) ptr,
+ second, fifth, third);
}
case MSGGET:
- return sys_msgget ((key_t) first, second);
+ return sys_msgget((key_t) first, second);
case MSGCTL:
- return sys_msgctl (first, second,
- (struct msqid_ds __user *) ptr);
+ return sys_msgctl(first, second,
+ (struct msqid_ds __user *) ptr);
case SHMAT:
switch (version) {
default: {
unsigned long raddr;
- ret = do_shmat (first, (char __user *) ptr, second,
- &raddr);
+ ret = do_shmat(first, (char __user *) ptr, second,
+ &raddr);
if (ret)
return ret;
- return put_user (raddr, (unsigned long __user *) third);
+ return put_user(raddr, (unsigned long __user *) third);
}
case 1: /* iBCS2 emulator entry point */
if (!segment_eq(get_fs(), get_ds()))
return -EINVAL;
- return do_shmat (first, (char __user *) ptr, second,
- (unsigned long *) third);
+ return do_shmat(first, (char __user *) ptr, second,
+ (unsigned long *) third);
}
case SHMDT:
- return sys_shmdt ((char __user *)ptr);
+ return sys_shmdt((char __user *)ptr);
case SHMGET:
- return sys_shmget (first, second, third);
+ return sys_shmget(first, second, third);
case SHMCTL:
- return sys_shmctl (first, second,
- (struct shmid_ds __user *) ptr);
+ return sys_shmctl(first, second,
+ (struct shmid_ds __user *) ptr);
default:
return -ENOSYS;
}