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