54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/mm.h>
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#include <linux/unistd.h>
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#include <asm/mman.h>
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#include <asm/uaccess.h>
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#include <asm/syscalls.h>
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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, off_t offset)
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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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return error;
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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, offset);
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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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return error;
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}
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int kernel_execve(const char *file, char **argv, char **envp)
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{
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register long scno asm("r8") = __NR_execve;
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register long sc1 asm("r12") = (long)file;
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register long sc2 asm("r11") = (long)argv;
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register long sc3 asm("r10") = (long)envp;
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asm volatile("scall"
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: "=r"(sc1)
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: "r"(scno), "0"(sc1), "r"(sc2), "r"(sc3)
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: "cc", "memory");
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return sc1;
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}
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