103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
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/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <errno.h>
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#include <sys/mman.h>
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#include "mem_user.h"
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#include "mem.h"
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#include "user.h"
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#include "os.h"
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#include "proc_mm.h"
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void map(int fd, unsigned long virt, unsigned long len, int r, int w,
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int x, int phys_fd, unsigned long long offset)
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{
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struct proc_mm_op map;
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int prot, n;
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prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
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(x ? PROT_EXEC : 0);
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map = ((struct proc_mm_op) { .op = MM_MMAP,
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.u =
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{ .mmap =
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{ .addr = virt,
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.len = len,
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.prot = prot,
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.flags = MAP_SHARED |
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MAP_FIXED,
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.fd = phys_fd,
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.offset = offset
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} } } );
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n = os_write_file(fd, &map, sizeof(map));
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if(n != sizeof(map))
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printk("map : /proc/mm map failed, err = %d\n", -n);
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}
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int unmap(int fd, void *addr, unsigned long len)
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{
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struct proc_mm_op unmap;
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int n;
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unmap = ((struct proc_mm_op) { .op = MM_MUNMAP,
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.u =
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{ .munmap =
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{ .addr = (unsigned long) addr,
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.len = len } } } );
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n = os_write_file(fd, &unmap, sizeof(unmap));
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if(n != sizeof(unmap)) {
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if(n < 0)
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return(n);
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else if(n > 0)
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return(-EIO);
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}
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return(0);
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}
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int protect(int fd, unsigned long addr, unsigned long len, int r, int w,
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int x, int must_succeed)
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{
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struct proc_mm_op protect;
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int prot, n;
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prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) |
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(x ? PROT_EXEC : 0);
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protect = ((struct proc_mm_op) { .op = MM_MPROTECT,
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.u =
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{ .mprotect =
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{ .addr = (unsigned long) addr,
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.len = len,
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.prot = prot } } } );
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n = os_write_file(fd, &protect, sizeof(protect));
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if(n != sizeof(protect)) {
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if(n == 0) return(0);
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if(must_succeed)
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panic("protect failed, err = %d", -n);
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return(-EIO);
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}
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return(0);
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}
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void before_mem_skas(unsigned long unused)
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{
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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