2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* linux/arch/h8300/kernel/sys_h8300.c
|
|
|
|
*
|
|
|
|
* This file contains various random system calls that
|
|
|
|
* have a non-standard calling sequence on the H8/300
|
|
|
|
* platform.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/smp.h>
|
|
|
|
#include <linux/smp_lock.h>
|
|
|
|
#include <linux/sem.h>
|
|
|
|
#include <linux/msg.h>
|
|
|
|
#include <linux/shm.h>
|
|
|
|
#include <linux/stat.h>
|
|
|
|
#include <linux/syscalls.h>
|
|
|
|
#include <linux/mman.h>
|
|
|
|
#include <linux/file.h>
|
|
|
|
#include <linux/utsname.h>
|
|
|
|
|
|
|
|
#include <asm/setup.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <asm/cachectl.h>
|
|
|
|
#include <asm/traps.h>
|
|
|
|
#include <asm/ipc.h>
|
2006-10-02 17:18:34 +08:00
|
|
|
#include <asm/unistd.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* sys_pipe() is the normal C calling standard for creating
|
|
|
|
* a pipe. It's not the way unix traditionally does this, though.
|
|
|
|
*/
|
|
|
|
asmlinkage int sys_pipe(unsigned long * fildes)
|
|
|
|
{
|
|
|
|
int fd[2];
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = do_pipe(fd);
|
|
|
|
if (!error) {
|
|
|
|
if (copy_to_user(fildes, fd, 2*sizeof(int)))
|
|
|
|
error = -EFAULT;
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* common code for old and new mmaps */
|
|
|
|
static inline long do_mmap2(
|
|
|
|
unsigned long addr, unsigned long len,
|
|
|
|
unsigned long prot, unsigned long flags,
|
|
|
|
unsigned long fd, unsigned long pgoff)
|
|
|
|
{
|
|
|
|
int error = -EBADF;
|
|
|
|
struct file * file = NULL;
|
|
|
|
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
|
|
file = fget(fd);
|
|
|
|
if (!file)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
|
|
|
|
if (file)
|
|
|
|
fput(file);
|
|
|
|
out:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
asmlinkage 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);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Perform the select(nd, in, out, ex, tv) and mmap() system
|
|
|
|
* calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
|
|
|
|
* handle more than 4 system call parameters, so these system calls
|
|
|
|
* used a memory block for parameter passing..
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct mmap_arg_struct {
|
|
|
|
unsigned long addr;
|
|
|
|
unsigned long len;
|
|
|
|
unsigned long prot;
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned long fd;
|
|
|
|
unsigned long offset;
|
|
|
|
};
|
|
|
|
|
|
|
|
asmlinkage int old_mmap(struct mmap_arg_struct *arg)
|
|
|
|
{
|
|
|
|
struct mmap_arg_struct a;
|
|
|
|
int error = -EFAULT;
|
|
|
|
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = -EINVAL;
|
|
|
|
if (a.offset & ~PAGE_MASK)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
|
|
|
|
|
|
error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
|
|
|
|
out:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
#if 0 /* DAVIDM - do we want this */
|
|
|
|
struct mmap_arg_struct64 {
|
|
|
|
__u32 addr;
|
|
|
|
__u32 len;
|
|
|
|
__u32 prot;
|
|
|
|
__u32 flags;
|
|
|
|
__u64 offset; /* 64 bits */
|
|
|
|
__u32 fd;
|
|
|
|
};
|
|
|
|
|
|
|
|
asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
|
|
|
|
{
|
|
|
|
int error = -EFAULT;
|
|
|
|
struct file * file = NULL;
|
|
|
|
struct mmap_arg_struct64 a;
|
|
|
|
unsigned long pgoff;
|
|
|
|
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if ((long)a.offset & ~PAGE_MASK)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
pgoff = a.offset >> PAGE_SHIFT;
|
|
|
|
if ((a.offset >> PAGE_SHIFT) != pgoff)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!(a.flags & MAP_ANONYMOUS)) {
|
|
|
|
error = -EBADF;
|
|
|
|
file = fget(a.fd);
|
|
|
|
if (!file)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
|
|
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
|
|
error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
|
|
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
if (file)
|
|
|
|
fput(file);
|
|
|
|
out:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
struct sel_arg_struct {
|
|
|
|
unsigned long n;
|
|
|
|
fd_set *inp, *outp, *exp;
|
|
|
|
struct timeval *tvp;
|
|
|
|
};
|
|
|
|
|
|
|
|
asmlinkage int old_select(struct sel_arg_struct *arg)
|
|
|
|
{
|
|
|
|
struct sel_arg_struct a;
|
|
|
|
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
|
|
return -EFAULT;
|
|
|
|
/* sys_select() does the appropriate kernel locking */
|
|
|
|
return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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,
|
|
|
|
int third, void *ptr, long fifth)
|
|
|
|
{
|
|
|
|
int version, ret;
|
|
|
|
|
|
|
|
version = call >> 16; /* hack for backward compatibility */
|
|
|
|
call &= 0xffff;
|
|
|
|
|
|
|
|
if (call <= SEMCTL)
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (call <= MSGCTL)
|
|
|
|
switch (call) {
|
|
|
|
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);
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (call <= SHMCTL)
|
|
|
|
switch (call) {
|
|
|
|
case SHMAT:
|
|
|
|
switch (version) {
|
|
|
|
default: {
|
|
|
|
ulong raddr;
|
|
|
|
ret = do_shmat (first, (char *) ptr,
|
|
|
|
second, &raddr);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
return put_user (raddr, (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;
|
|
|
|
}
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* sys_cacheflush -- no support. */
|
|
|
|
asmlinkage int
|
|
|
|
sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
asmlinkage int sys_getpagesize(void)
|
|
|
|
{
|
|
|
|
return PAGE_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
#if defined(CONFIG_SYSCALL_PRINT)
|
|
|
|
asmlinkage void syscall_print(void *dummy,...)
|
|
|
|
{
|
|
|
|
struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
|
|
|
|
printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
|
|
|
|
((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
|
|
|
|
}
|
|
|
|
#endif
|
2006-10-02 17:18:34 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Do a system call from kernel instead of calling sys_execve so we
|
|
|
|
* end up with proper pt_regs.
|
|
|
|
*/
|
|
|
|
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
|
|
|
|
{
|
|
|
|
register long res __asm__("er0");
|
|
|
|
register const char * _a __asm__("er1") = filename;
|
|
|
|
register void *_b __asm__("er2") = argv;
|
|
|
|
register void *_c __asm__("er3") = envp;
|
|
|
|
__asm__ __volatile__ ("mov.l %1,er0\n\t"
|
|
|
|
"trapa #0\n\t"
|
|
|
|
: "=r" (res)
|
|
|
|
: "g" (__NR_execve),
|
|
|
|
"g" (_a),
|
|
|
|
"g" (_b),
|
|
|
|
"g" (_c)
|
|
|
|
: "cc", "memory");
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
|