125 строки
3.1 KiB
C
125 строки
3.1 KiB
C
/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
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*
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* Copyright (C) 2006 Atmark Techno, Inc.
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* Yasushi SHOJI <yashi@atmark-techno.com>
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* Tetsuya OHKAWA <tetsuya@atmark-techno.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/syscalls.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/mman.h>
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#include <linux/sys.h>
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#include <linux/ipc.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/semaphore.h>
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#include <linux/uaccess.h>
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#include <linux/unistd.h>
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#include <asm/syscalls.h>
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asmlinkage long microblaze_vfork(struct pt_regs *regs)
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{
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return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
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regs, 0, NULL, NULL);
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}
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asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
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{
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if (!stack)
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stack = regs->r1;
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return do_fork(flags, stack, regs, 0, NULL, NULL);
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}
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asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv,
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char __user *__user *envp, struct pt_regs *regs)
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{
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int error;
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char *filename;
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filename = getname(filenamei);
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error = PTR_ERR(filename);
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if (IS_ERR(filename))
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goto out;
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error = do_execve(filename, argv, envp, regs);
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putname(filename);
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out:
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return error;
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}
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asmlinkage long
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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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struct file *file = NULL;
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int ret = -EBADF;
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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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printk(KERN_INFO "no fd in mmap\r\n");
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goto out;
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}
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}
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down_write(¤t->mm->mmap_sem);
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ret = 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 ret;
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}
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asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, off_t pgoff)
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{
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int err = -EINVAL;
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if (pgoff & ~PAGE_MASK) {
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printk(KERN_INFO "no pagemask in mmap\r\n");
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goto out;
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}
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err = sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
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out:
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return err;
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}
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/*
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* Do a system call from kernel instead of calling sys_execve so we
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* end up with proper pt_regs.
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*/
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int kernel_execve(const char *filename, char *const argv[], char *const envp[])
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{
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register const char *__a __asm__("r5") = filename;
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register const void *__b __asm__("r6") = argv;
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register const void *__c __asm__("r7") = envp;
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register unsigned long __syscall __asm__("r12") = __NR_execve;
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register unsigned long __ret __asm__("r3");
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__asm__ __volatile__ ("brki r14, 0x8"
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: "=r" (__ret), "=r" (__syscall)
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: "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
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: "r4", "r8", "r9",
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"r10", "r11", "r14", "cc", "memory");
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return __ret;
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}
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