coreboot-kgpe-d16/util/nvramtool/win32mmap.c
Zheng Bao 545167252d build: build coreboot on mingw.
regex, pdcurses, wsock(for itohl) are seperated libraries. mmap and unmmap are
ported from git.

Issues:
1. The length of command line is limited. That makes the Thather can not be built
  because too many obj.o need to be built.

Change-Id: I1d60ec5c7720c1e712e246c4cd12e4b718fed05f
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/1604
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
2012-10-22 21:49:54 +02:00

49 lines
1.1 KiB
C

#include "common.h"
#include <windows.h>
static inline size_t xsize_t(off_t len)
{
if (len > (size_t) len)
die("Cannot handle files this big");
return (size_t)len;
}
void *win32_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
{
HANDLE hmap;
void *temp;
off_t len;
struct stat st;
uint64_t o = offset;
uint32_t l = o & 0xFFFFFFFF;
uint32_t h = (o >> 32) & 0xFFFFFFFF;
if (!fstat(fd, &st))
len = st.st_size;
else
printf("mmap: could not determine filesize");
if ((length + offset) > len)
length = xsize_t(len - offset);
if (!(flags & MAP_PRIVATE))
printf("Invalid usage of mmap when built with USE_WIN32_MMAP");
hmap = CreateFileMapping((HANDLE)_get_osfhandle(fd), 0, PAGE_WRITECOPY,
0, 0, 0);
if (!hmap)
return MAP_FAILED;
temp = MapViewOfFileEx(hmap, FILE_MAP_COPY, h, l, length, start);
if (!CloseHandle(hmap))
printf("unable to close file mapping handle");
return temp ? temp : MAP_FAILED;
}
int win32_munmap(void *start, size_t length)
{
return !UnmapViewOfFile(start);
}