122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
#include <sys/types.h>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#undef WIN32_LEAN_AND_MEAN
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#ifndef __CEGCC__
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# include <io.h>
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#endif /* ! __CEGCC__ */
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#include "sys/mman.h"
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif /* HAVE_CONFIG_H */
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#if HAVE___ATTRIBUTE__
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# define __UNUSED__ __attribute__((unused))
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#else
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# define __UNUSED__
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#endif /* HAVE___ATTRIBUTE__ */
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#if defined(__CEGCC__)
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# define CreateFileMapping CreateFileMappingW
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# define _get_osfhandle get_osfhandle
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# elif defined (__MINGW32CE__)
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# define _get_osfhandle(FILEDES) ((long)FILEDES)
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#endif /* ! __CEGCC__ && ! __MINGW32CE__ */
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void *
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mmap(void *addr __UNUSED__,
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size_t len,
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int prot,
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int flags,
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int fd,
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off_t offset)
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{
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void *data;
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HANDLE fm;
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DWORD protect = PAGE_NOACCESS;
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DWORD access = 0;
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/* support only MAP_SHARED */
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if (!(flags & MAP_SHARED)) return (void *)~0;
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if (prot & PROT_EXEC)
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{
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if (prot & PROT_READ)
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{
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if (prot & PROT_WRITE)
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protect = PAGE_EXECUTE_READWRITE;
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else
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protect = PAGE_EXECUTE_READ;
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}
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else
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{
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if (prot & PROT_WRITE)
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protect = PAGE_EXECUTE_WRITECOPY;
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else
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protect = PAGE_EXECUTE;
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}
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}
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else
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{
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if (prot & PROT_READ)
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{
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if (prot & PROT_WRITE)
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protect = PAGE_READWRITE;
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else
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protect = PAGE_READONLY;
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}
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else if (prot & PROT_WRITE)
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protect = PAGE_WRITECOPY;
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}
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fm = CreateFileMapping((HANDLE)_get_osfhandle (fd),
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NULL,
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protect,
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0,
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0,
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NULL);
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if (!fm) return (void *)~0;
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if (protect & PAGE_READWRITE)
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access = FILE_MAP_ALL_ACCESS;
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if (protect & PAGE_WRITECOPY)
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access = FILE_MAP_COPY;
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#if 0
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if (protect & (PAGE_EXECUTE_READWRITE | PAGE_EXECUTE_READ))
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access = FILE_MAP_EXECUTE;
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#endif
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if (protect & (PAGE_READWRITE | PAGE_READONLY))
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access = FILE_MAP_READ;
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else
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{
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if (protect & PAGE_READWRITE)
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access = FILE_MAP_WRITE;
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}
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data = MapViewOfFile(fm,
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access,
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offset & 0xffff0000,
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offset & 0x0000ffff,
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len);
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CloseHandle(fm);
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if (!data) return (void *)~0;
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else return data;
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}
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int
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munmap(void *addr,
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size_t len __UNUSED__)
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{
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BOOL res;
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res = UnmapViewOfFile(addr);
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return (res == 0) ? -1 : 0;
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}
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