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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#include <io.h>
#include "evil_macro.h"
#include "sys/mman.h"
#include "evil_util.h"
#include "evil_private.h"
/***** API *****/
void *
mmap(void *addr EVIL_UNUSED,
size_t len,
int prot,
int flags,
int fd,
off_t offset)
{
HANDLE fm;
DWORD protect = PAGE_NOACCESS;
DWORD acs = 0;
HANDLE handle;
void *data;
/* support only MAP_SHARED */
if (!(flags & MAP_SHARED))
return MAP_FAILED;
if (prot & PROT_EXEC)
{
if (prot & PROT_READ)
{
if (prot & PROT_WRITE)
protect = PAGE_EXECUTE_READWRITE;
else
protect = PAGE_EXECUTE_READ;
}
else
{
if (prot & PROT_WRITE)
protect = PAGE_EXECUTE_WRITECOPY;
else
protect = PAGE_EXECUTE;
}
}
else
{
if (prot & PROT_READ)
{
if (prot & PROT_WRITE)
protect = PAGE_READWRITE;
else
protect = PAGE_READONLY;
}
else if (prot & PROT_WRITE)
protect = PAGE_WRITECOPY;
}
handle = (HANDLE)_get_osfhandle(fd);
if (handle == INVALID_HANDLE_VALUE)
{
fprintf(stderr, "[Evil] [mmap] _get_osfhandle failed\n");
return MAP_FAILED;
}
fm = CreateFileMapping(handle, NULL, protect, 0, 0, NULL);
if (!fm)
{
char *str;
str = evil_last_error_get();
fprintf(stderr, "[Evil] [mmap] CreateFileMapping failed: %s\n", str);
free(str);
return MAP_FAILED;
}
if ((protect & PAGE_READWRITE) == PAGE_READWRITE)
acs = FILE_MAP_ALL_ACCESS;
else if ((protect & PAGE_WRITECOPY) == PAGE_WRITECOPY)
acs = FILE_MAP_COPY;
#if 0
if (protect & (PAGE_EXECUTE_READWRITE | PAGE_EXECUTE_READ))
acs = FILE_MAP_EXECUTE;
#endif
else if (protect & (PAGE_READWRITE | PAGE_READONLY))
acs = FILE_MAP_READ;
else
{
if ((protect & PAGE_WRITECOPY) == PAGE_WRITECOPY)
acs = FILE_MAP_WRITE;
}
data = MapViewOfFile(fm,
acs,
offset & 0xffff0000,
offset & 0x0000ffff,
len);
CloseHandle(fm);
if (!data)
{
char *str;
str = evil_last_error_get();
fprintf(stderr, "[Evil] [mmap] MapViewOfFile failed: %s\n", str);
free(str);
return MAP_FAILED;
}
return data;
}
int
munmap(void *addr,
size_t len EVIL_UNUSED)
{
BOOL res;
res = UnmapViewOfFile(addr);
if (!res)
{
char *str;
str = evil_last_error_get();
fprintf(stderr, "[Evil] [munmap] UnmapViewOfFile failed: %s\n", str);
free(str);
}
return (res == 0) ? -1 : 0;
}
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