![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
209 lines
4.5 KiB
C
209 lines
4.5 KiB
C
/*
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* linux/arch/m68knommu/kernel/sys_m68k.c
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*
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* This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/m68k
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* platform.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.h>
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#include <linux/syscalls.h>
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#include <linux/mman.h>
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#include <linux/file.h>
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#include <linux/utsname.h>
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#include <asm/setup.h>
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#include <asm/uaccess.h>
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#include <asm/cachectl.h>
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#include <asm/traps.h>
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#include <asm/ipc.h>
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#include <asm/cacheflush.h>
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way unix traditionally does this, though.
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*/
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asmlinkage int sys_pipe(unsigned long * fildes)
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{
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int fd[2];
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int error;
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error = do_pipe(fd);
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if (!error) {
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if (copy_to_user(fildes, fd, 2*sizeof(int)))
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error = -EFAULT;
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}
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return error;
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}
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/* common code for old and new mmaps */
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static inline long do_mmap2(
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unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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{
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int error = -EBADF;
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struct file * file = NULL;
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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if (!(flags & MAP_ANONYMOUS)) {
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file = fget(fd);
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if (!file)
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goto out;
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}
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down_write(¤t->mm->mmap_sem);
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error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
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up_write(¤t->mm->mmap_sem);
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if (file)
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fput(file);
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out:
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return error;
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}
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asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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{
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return do_mmap2(addr, len, prot, flags, fd, pgoff);
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}
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/*
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* Perform the select(nd, in, out, ex, tv) and mmap() system
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* calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
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* handle more than 4 system call parameters, so these system calls
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* used a memory block for parameter passing..
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*/
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struct mmap_arg_struct {
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unsigned long addr;
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unsigned long len;
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unsigned long prot;
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unsigned long flags;
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unsigned long fd;
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unsigned long offset;
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};
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asmlinkage int old_mmap(struct mmap_arg_struct *arg)
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{
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struct mmap_arg_struct a;
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int error = -EFAULT;
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if (copy_from_user(&a, arg, sizeof(a)))
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goto out;
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error = -EINVAL;
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if (a.offset & ~PAGE_MASK)
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goto out;
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a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
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out:
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return error;
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}
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struct sel_arg_struct {
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unsigned long n;
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fd_set *inp, *outp, *exp;
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struct timeval *tvp;
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};
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asmlinkage int old_select(struct sel_arg_struct *arg)
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{
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struct sel_arg_struct a;
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if (copy_from_user(&a, arg, sizeof(a)))
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return -EFAULT;
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/* sys_select() does the appropriate kernel locking */
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return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
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}
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/*
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* sys_ipc() is the de-multiplexer for the SysV IPC calls..
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*
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* This is really horribly ugly.
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*/
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asmlinkage int sys_ipc (uint call, int first, int second,
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int third, void *ptr, long fifth)
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{
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int version;
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version = call >> 16; /* hack for backward compatibility */
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call &= 0xffff;
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if (call <= SEMCTL)
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switch (call) {
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case SEMOP:
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return sys_semop (first, (struct sembuf *)ptr, second);
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case SEMGET:
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return sys_semget (first, second, third);
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case SEMCTL: {
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union semun fourth;
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if (!ptr)
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return -EINVAL;
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if (get_user(fourth.__pad, (void **) ptr))
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return -EFAULT;
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return sys_semctl (first, second, third, fourth);
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}
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default:
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return -EINVAL;
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}
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if (call <= MSGCTL)
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switch (call) {
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case MSGSND:
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return sys_msgsnd (first, (struct msgbuf *) ptr,
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second, third);
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case MSGRCV:
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switch (version) {
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case 0: {
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struct ipc_kludge tmp;
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if (!ptr)
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return -EINVAL;
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if (copy_from_user (&tmp,
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(struct ipc_kludge *)ptr,
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sizeof (tmp)))
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return -EFAULT;
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return sys_msgrcv (first, tmp.msgp, second,
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tmp.msgtyp, third);
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}
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default:
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return sys_msgrcv (first,
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(struct msgbuf *) ptr,
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second, fifth, third);
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}
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case MSGGET:
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return sys_msgget ((key_t) first, second);
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case MSGCTL:
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return sys_msgctl (first, second,
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(struct msqid_ds *) ptr);
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default:
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return -EINVAL;
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}
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return -EINVAL;
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}
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/* sys_cacheflush -- flush (part of) the processor cache. */
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asmlinkage int
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sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
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{
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flush_cache_all();
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return(0);
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}
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asmlinkage int sys_getpagesize(void)
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{
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return PAGE_SIZE;
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}
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