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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995 - 2000, 2001 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/mman.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/file.h>
#include <linux/utsname.h>
#include <linux/unistd.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <asm/ipc.h>
#include <asm/cachectl.h>
#include <asm/offset.h>
#include <asm/pgalloc.h>
#include <asm/ptrace.h>
#include <asm/signal.h>
#include <asm/stackframe.h>
#include <asm/sysmips.h>
#include <asm/uaccess.h>
extern asmlinkage void syscall_trace(void);
asmlinkage int sys_pipe(abi64_no_regargs, struct pt_regs regs)
{
int fd[2];
int error, res;
error = do_pipe(fd);
if (error) {
res = error;
goto out;
}
regs.regs[3] = fd[1];
res = fd[0];
out:
return res;
}
asmlinkage unsigned long
sys_mmap(unsigned long addr, size_t len, unsigned long prot,
unsigned long flags, unsigned long fd, off_t offset)
{
struct file * file = NULL;
unsigned long error = -EFAULT;
if (!(flags & MAP_ANONYMOUS)) {
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
}
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
down_write(¤t->mm->mmap_sem);
error = do_mmap(file, addr, len, prot, flags, offset);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
out:
return error;
}
asmlinkage int sys_fork(abi64_no_regargs, struct pt_regs regs)
{
int res;
save_static(®s);
res = do_fork(SIGCHLD, regs.regs[29], ®s, 0);
return res;
}
asmlinkage int sys_clone(abi64_no_regargs, struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int res;
save_static(®s);
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
res = do_fork(clone_flags, newsp, ®s, 0);
return res;
}
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys_execve(abi64_no_regargs, struct pt_regs regs)
{
int error;
char * filename;
filename = getname((char *) (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);
putname(filename);
out:
return error;
}
/*
* Do the indirect syscall syscall.
*
* XXX This is borken.
*/
asmlinkage int sys_syscall(abi64_no_regargs, struct pt_regs regs)
{
return -ENOSYS;
}
asmlinkage int
_sys_sysmips(int cmd, long arg1, int arg2, int arg3)
{
int *p;
char *name;
int tmp, len, errno;
switch(cmd) {
case SETNAME: {
char nodename[__NEW_UTS_LEN + 1];
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
name = (char *) arg1;
len = strncpy_from_user(nodename, name, sizeof(nodename));
if (len < 0)
return -EFAULT;
down_write(&uts_sem);
strncpy(system_utsname.nodename, name, len);
up_write(&uts_sem);
system_utsname.nodename[len] = '\0';
return 0;
}
case MIPS_ATOMIC_SET:
printk(KERN_CRIT "How did I get here?\n");
return -EINVAL;
case MIPS_FIXADE:
tmp = current->thread.mflags & ~3;
current->thread.mflags = tmp | (arg1 & 3);
return 0;
case FLUSH_CACHE:
_flush_cache_l2();
return 0;
case MIPS_RDNVRAM:
return -EIO;
}
return -EINVAL;
}
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
*/
asmlinkage int sys_ipc (uint call, int first, int second,
unsigned long third, void *ptr, long fifth)
{
int version, ret;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
return sys_semop (first, (struct sembuf *)ptr, second);
case SEMGET:
return sys_semget (first, second, third);
case SEMCTL: {
union semun fourth;
if (!ptr)
return -EINVAL;
if (get_user(fourth.__pad, (void **) ptr))
return -EFAULT;
return sys_semctl (first, second, third, fourth);
}
case MSGSND:
return sys_msgsnd (first, (struct msgbuf *) ptr,
second, third);
case MSGRCV:
switch (version) {
case 0: {
struct ipc_kludge tmp;
if (!ptr)
return -EINVAL;
if (copy_from_user(&tmp,
(struct ipc_kludge *) ptr,
sizeof (tmp)))
return -EFAULT;
return sys_msgrcv (first, tmp.msgp, second,
tmp.msgtyp, third);
}
default:
return sys_msgrcv (first,
(struct msgbuf *) ptr,
second, fifth, third);
}
case MSGGET:
return sys_msgget ((key_t) first, second);
case MSGCTL:
return sys_msgctl (first, second, (struct msqid_ds *) ptr);
case SHMAT:
switch (version) {
default: {
ulong raddr;
ret = sys_shmat (first, (char *) ptr, second, &raddr);
if (ret)
return ret;
return put_user (raddr, (ulong *) third);
}
case 1: /* iBCS2 emulator entry point */
if (!segment_eq(get_fs(), get_ds()))
return -EINVAL;
return sys_shmat (first, (char *) ptr, second, (ulong *) third);
}
case SHMDT:
return sys_shmdt ((char *)ptr);
case SHMGET:
return sys_shmget (first, second, third);
case SHMCTL:
return sys_shmctl (first, second,
(struct shmid_ds *) ptr);
default:
return -EINVAL;
}
}
/*
* No implemented yet ...
*/
asmlinkage int
sys_cachectl(char *addr, int nbytes, int op)
{
return -ENOSYS;
}
/*
* If we ever come here the user sp is bad. Zap the process right away.
* Due to the bad stack signaling wouldn't work.
*/
asmlinkage void bad_stack(void)
{
do_exit(SIGSEGV);
}
asmlinkage int sys_pause(void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
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