Add support for building native win32 tools

Add support for compiling the host tools in the tools directory using
the MinGW toolchain.  This produces executables which can be used on
standard Windows computers without requiring cygwin.

One must specify the MinGW compiler and strip utilities as if they
were the host toolchain in order to build win32 executables, eg:

make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

7 files changed, 207 insertions, 7 deletions

diff --git a/tools/Makefile b/tools/Makefile
index 9fe5b1a..122e5bb 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -46,12 +46,15 @@ else
 HOST_CFLAGS += -pedantic
 endif
 
+ifeq ($(HOSTOS),cygwin)
+HOST_CFLAGS += -ansi
+endif
+
 #
-# Cygwin needs .exe files :-(
+# toolchains targeting win32 generate .exe files
 #
-ifeq ($(HOSTOS),cygwin)
+ifneq (,$(findstring WIN32 ,$(shell $(HOSTCC) -E -dM -xc /dev/null)))
 SFX = .exe
-HOST_CFLAGS += -ansi
 else
 SFX =
 endif
@@ -90,6 +93,7 @@ OBJ_FILES-$(CONFIG_LCD_LOGO) += bmp_logo.o
 OBJ_FILES-$(CONFIG_VIDEO_LOGO) += bmp_logo.o
 OBJ_FILES-$(CONFIG_INCA_IP) += inca-swap-bytes.o
 OBJ_FILES-$(CONFIG_NETCONSOLE) += ncb.o
+OBJ_FILES-y += os_support.o
 
 # Don't build by default
 #ifeq ($(ARCH),ppc)
@@ -125,13 +129,15 @@ LIBFDT_OBJS	:= $(addprefix $(obj),$(LIBFDT_OBJ_FILES-y))
 
 #
 # Use native tools and options
+# Define __KERNEL_STRICT_NAMES to prevent typedef overlaps
 #
 CPPFLAGS   = -idirafter $(SRCTREE)/include \
 		-idirafter $(OBJTREE)/include2 \
 		-idirafter $(OBJTREE)/include \
 	        -I $(SRCTREE)/libfdt \
 		-I $(SRCTREE)/tools \
-		-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC
+		-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC \
+		-D__KERNEL_STRICT_NAMES
 CFLAGS     = $(HOST_CFLAGS) $(CPPFLAGS) -O
 
 # No -pedantic switch to avoid libfdt compilation warnings
@@ -147,7 +153,7 @@ all:	$(obj).depend $(BINS) $(LOGO-y) subdirs
 $(obj)envcrc$(SFX):	$(obj)envcrc.o $(obj)crc32.o $(obj)env_embedded.o $(obj)sha1.o
 	$(CC) $(CFLAGS) -o $@ $^
 
-$(obj)ubsha1$(SFX):	$(obj)ubsha1.o $(obj)sha1.o
+$(obj)ubsha1$(SFX):	$(obj)ubsha1.o $(obj)sha1.o $(obj)os_support.o
 	$(CC) $(CFLAGS) -o $@ $^
 
 $(obj)img2srec$(SFX):	$(obj)img2srec.o
@@ -155,7 +161,7 @@ $(obj)img2srec$(SFX):	$(obj)img2srec.o
 	$(STRIP) $@
 
 $(obj)mkimage$(SFX):	$(obj)mkimage.o $(obj)crc32.o $(obj)image.o $(obj)md5.o \
-			$(obj)sha1.o $(LIBFDT_OBJS)
+			$(obj)sha1.o $(LIBFDT_OBJS) $(obj)os_support.o
 	$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 	$(STRIP) $@
 
@@ -183,13 +189,16 @@ $(obj)bin2header$(SFX): $(obj)bin2header.o
 	$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 	$(STRIP) $@
 
-# image.c and mkimage.c require FIT_CFLAGS instead of standard CFLAGS
+# Some files complain if compiled with -pedantic, use FIT_CFLAGS
 $(obj)image.o: $(SRCTREE)/tools/image.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
 
 $(obj)mkimage.o: $(SRCTREE)/tools/mkimage.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
 
+$(obj)os_support.o: $(SRCTREE)/tools/os_support.c
+	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
+
 # Some of the tool objects need to be accessed from outside the tools directory
 $(obj)%.o: $(SRCTREE)/common/%.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
diff --git a/tools/mingw_support.c b/tools/mingw_support.c
new file mode 100644
index 0000000..67cd6e1
--- /dev/null
+++ b/tools/mingw_support.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * mmap/munmap implementation derived from:
+ * Clamav Native Windows Port : mmap win32 compatibility layer
+ * Copyright (c) 2005-2006 Gianluigi Tiesi <sherpya@netfarm.it>
+ * Parts by Kees Zeelenberg <kzlg@users.sourceforge.net> (LibGW32C)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this software; if not, write to the
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "mingw_support.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <errno.h>
+#include <io.h>
+
+int fsync(int fd)
+{
+	return _commit(fd);
+}
+
+void *mmap(void *addr, size_t len, int prot, int flags, int fd, int offset)
+{
+	void *map = NULL;
+	HANDLE handle = INVALID_HANDLE_VALUE;
+	DWORD cfm_flags = 0, mvf_flags = 0;
+
+	switch (prot) {
+	case PROT_READ | PROT_WRITE:
+		cfm_flags = PAGE_READWRITE;
+		mvf_flags = FILE_MAP_ALL_ACCESS;
+		break;
+	case PROT_WRITE:
+		cfm_flags = PAGE_READWRITE;
+		mvf_flags = FILE_MAP_WRITE;
+		break;
+	case PROT_READ:
+		cfm_flags = PAGE_READONLY;
+		mvf_flags = FILE_MAP_READ;
+		break;
+	default:
+		return MAP_FAILED;
+	}
+
+	handle = CreateFileMappingA((HANDLE) _get_osfhandle(fd), NULL,
+				cfm_flags, HIDWORD(len), LODWORD(len), NULL);
+	if (!handle)
+		return MAP_FAILED;
+
+	map = MapViewOfFile(handle, mvf_flags, HIDWORD(offset),
+			LODWORD(offset), len);
+	CloseHandle(handle);
+
+	if (!map)
+		return MAP_FAILED;
+
+	return map;
+}
+
+int munmap(void *addr, size_t len)
+{
+	if (!UnmapViewOfFile(addr))
+		return -1;
+
+	return 0;
+}
diff --git a/tools/mingw_support.h b/tools/mingw_support.h
new file mode 100644
index 0000000..1fb6c93
--- /dev/null
+++ b/tools/mingw_support.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this software; if not, write to the
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __MINGW_SUPPORT_H_
+#define __WINGW_SUPPORT_H_	1
+
+/* Defining __INSIDE_MSYS__ helps to prevent u-boot/mingw overlap */
+#define __INSIDE_MSYS__	1
+
+#include <windows.h>
+
+/* mmap protections */
+#define PROT_READ	0x1		/* Page can be read */
+#define PROT_WRITE	0x2		/* Page can be written */
+#define PROT_EXEC	0x4		/* Page can be executed */
+#define PROT_NONE	0x0		/* Page can not be accessed */
+
+/* Sharing types (must choose one and only one of these) */
+#define MAP_SHARED	0x01		/* Share changes */
+#define MAP_PRIVATE	0x02		/* Changes are private */
+
+/* Return value of `mmap' in case of an error */
+#define MAP_FAILED	((void *) -1)
+
+/* Windows 64-bit access macros */
+#define LODWORD(x) ((DWORD)((DWORDLONG)(x)))
+#define HIDWORD(x) ((DWORD)(((DWORDLONG)(x) >> 32) & 0xffffffff))
+
+typedef	UINT	uint;
+typedef	ULONG	ulong;
+
+int fsync(int fd);
+void *mmap(void *, size_t, int, int, int, int);
+int munmap(void *, size_t);
+
+#endif /* __MINGW_SUPPORT_H_ */
diff --git a/tools/mkimage.h b/tools/mkimage.h
index a2d5248..c8df6e1 100644
--- a/tools/mkimage.h
+++ b/tools/mkimage.h
@@ -20,6 +20,7 @@
  * MA 02111-1307 USA
  */
 
+#include "os_support.h"
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ -28,7 +29,11 @@
 #ifndef __WIN32__
 #include <netinet/in.h>		/* for host / network byte order conversions	*/
 #endif
+#ifdef __MINGW32__
+#include <stdint.h>
+#else
 #include <sys/mman.h>
+#endif
 #include <sys/stat.h>
 #include <time.h>
 #include <unistd.h>
diff --git a/tools/os_support.c b/tools/os_support.c
new file mode 100644
index 0000000..001fe64
--- /dev/null
+++ b/tools/os_support.c
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2009 Extreme Engineering Solutions, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this software; if not, write to the
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * Include additional files required for supporting different operating systems
+ */
+#ifdef __MINGW32__
+#include "mingw_support.c"
+#endif
diff --git a/tools/os_support.h b/tools/os_support.h
new file mode 100644
index 0000000..f6f86b0
--- /dev/null
+++ b/tools/os_support.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009 Extreme Engineering Solutions, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this software; if not, write to the
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __OS_SUPPORT_H_
+#define __OS_SUPPORT_H_
+
+/*
+ * Include additional files required for supporting different operating systems
+ */
+#ifdef __MINGW32__
+#include "mingw_support.h"
+#endif
+
+#endif /* __OS_SUPPORT_H_ */
diff --git a/tools/ubsha1.c b/tools/ubsha1.c
index b37b2b7..c4203ed 100644
--- a/tools/ubsha1.c
+++ b/tools/ubsha1.c
@@ -21,13 +21,16 @@
  * MA 02111-1307 USA
  */
 
+#include "os_support.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <string.h>
+#ifndef __MINGW32__
 #include <sys/mman.h>
+#endif
 #include <sys/stat.h>
 #include "sha1.h"