WSL2-Linux-Kernel/arch/um/kernel/syscall.c

69 строки
1.4 KiB
C

/*
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include "linux/file.h"
#include "linux/fs.h"
#include "linux/mm.h"
#include "linux/sched.h"
#include "linux/utsname.h"
#include "linux/syscalls.h"
#include "asm/current.h"
#include "asm/mman.h"
#include "asm/uaccess.h"
#include "asm/unistd.h"
#include "internal.h"
long sys_fork(void)
{
long ret;
current->thread.forking = 1;
ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
&current->thread.regs, 0, NULL, NULL);
current->thread.forking = 0;
return ret;
}
long sys_vfork(void)
{
long ret;
current->thread.forking = 1;
ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
UPT_SP(&current->thread.regs.regs),
&current->thread.regs, 0, NULL, NULL);
current->thread.forking = 0;
return ret;
}
long old_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long offset)
{
long err = -EINVAL;
if (offset & ~PAGE_MASK)
goto out;
err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
out:
return err;
}
int kernel_execve(const char *filename,
const char *const argv[],
const char *const envp[])
{
mm_segment_t fs;
int ret;
fs = get_fs();
set_fs(KERNEL_DS);
ret = um_execve(filename, (const char __user *const __user *)argv,
(const char __user *const __user *) envp);
set_fs(fs);
return ret;
}