1 files changed, 148 insertions, 0 deletions
diff --git a/gcc/config/i386/host-mingw32.c b/gcc/config/i386/host-mingw32.c
new file mode 100644
index 00000000000..0e3fdd7caf1
--- /dev/null
+++ b/gcc/config/i386/host-mingw32.c
@@ -0,0 +1,148 @@
+/* mingw32 host-specific hook definitions.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 2, or (at your
+   option) any later version.
+
+   GCC 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 General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING.  If not, write to the
+   Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "hosthooks.h"
+#include "hosthooks-def.h"
+#include "toplev.h"
+#include "diagnostic.h"
+
+
+#define WIN32_LEAN_AND_MEAN  /* Not so important if we have windows.h.gch.  */
+#include <windows.h>
+
+static void * mingw32_gt_pch_get_address (size_t, int);
+static int mingw32_gt_pch_use_address (void *, size_t, int, size_t);
+static size_t mingw32_gt_pch_alloc_granularity (void);
+
+#undef HOST_HOOKS_GT_PCH_GET_ADDRESS
+#define HOST_HOOKS_GT_PCH_GET_ADDRESS mingw32_gt_pch_get_address
+#undef HOST_HOOKS_GT_PCH_USE_ADDRESS
+#define HOST_HOOKS_GT_PCH_USE_ADDRESS mingw32_gt_pch_use_address
+#undef HOST_HOOKS_GT_PCH_ALLOC_GRANULARITY
+#define HOST_HOOKS_GT_PCH_ALLOC_GRANULARITY mingw32_gt_pch_alloc_granularity
+
+static inline void w32_error(const char*, const char*, int, const char*);
+
+/* FIXME: Is this big enough?  */
+static const size_t pch_VA_max_size  = 128 * 1024 * 1024;
+
+/* Granularity for reserving address space.  */
+static const size_t va_granularity = 0x10000;
+
+/* Print out the GetLastError() translation.  */ 
+static inline void
+w32_error (const char* function, const char* file, int line,
+	   const char* my_msg)
+{
+  LPSTR w32_msgbuf;
+  FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER
+		  | FORMAT_MESSAGE_FROM_SYSTEM
+		  | FORMAT_MESSAGE_IGNORE_INSERTS
+		  | FORMAT_MESSAGE_MAX_WIDTH_MASK,
+    		  NULL, GetLastError(),
+		  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+		  (LPSTR) &w32_msgbuf, 0, NULL);
+  fprintf(stderr, "internal error in %s, at %s:%d: %s: %s\n",
+	  function, trim_filename (file), line, my_msg, w32_msgbuf);
+  LocalFree ((HLOCAL)w32_msgbuf);
+}
+
+/* Granularity for reserving address space.  */
+static size_t mingw32_gt_pch_alloc_granularity (void)
+{
+  return va_granularity;
+}
+
+/* Identify an address that's likely to be free in a subsequent invocation
+   of the compiler.  The area should be able to hold SIZE bytes.  FD is an
+   open file descriptor if the host would like to probe with mmap.  */
+
+static void *
+mingw32_gt_pch_get_address (size_t size, int fd  ATTRIBUTE_UNUSED)
+{
+  void* res;
+  size = (size + va_granularity - 1) & ~(va_granularity - 1);
+  if (size > pch_VA_max_size)
+    return NULL;
+
+  /* FIXME: We let system determine base by setting first arg to NULL.
+     Allocating at top of available address space avoids unnecessary
+     fragmentation of "ordinary" (malloc's)  address space but may not be safe
+     with delayed load of system dll's. Preferred addresses for NT system
+     dlls is in 0x70000000 to 0x78000000 range.
+     If we allocate at bottom we need to reserve the address as early as possible
+     and at the same point in each invocation. */
+ 
+  res = VirtualAlloc (NULL, pch_VA_max_size,
+		      MEM_RESERVE | MEM_TOP_DOWN,
+		      PAGE_NOACCESS);
+  if (!res)
+    w32_error (__FUNCTION__, __FILE__, __LINE__, "VirtualAlloc");
+  else
+    /* We do not need the address space for now, so free it.  */
+    VirtualFree (res, 0, MEM_RELEASE);
+
+  return res; 
+}
+
+/* ADDR is an address returned by gt_pch_get_address.  Attempt to allocate
+   SIZE bytes at the same address and load it with the data from FD at 
+   OFFSET.  Return -1 if we couldn't allocate memory at ADDR, return 0
+   if the memory is allocated but the data not loaded, return 1 if done.  */
+
+static int
+mingw32_gt_pch_use_address (void *addr, size_t size, int fd,
+			    size_t offset)
+{
+  void * mmap_addr;
+  static HANDLE mmap_handle;
+
+  if (size == 0)
+    return 0;
+  
+  /* Offset must be also be a multiple of allocation granularity for
+     this to work.  We can't change the offset. */ 
+  if ((offset & (va_granularity - 1)) != 0 || size > pch_VA_max_size)
+    return -1;
+
+  mmap_handle = CreateFileMapping ((HANDLE) _get_osfhandle (fd),
+				   NULL, PAGE_WRITECOPY | SEC_COMMIT,
+				   0, 0,  NULL);
+  if (mmap_handle == NULL)
+    {
+      w32_error (__FUNCTION__,  __FILE__, __LINE__, "CreateFileMapping");
+      return -1; 
+    }
+  mmap_addr = MapViewOfFileEx (mmap_handle, FILE_MAP_COPY, 0, offset,
+			       size, addr);
+  if (mmap_addr != addr)
+    {
+      w32_error (__FUNCTION__, __FILE__, __LINE__, "MapViewOfFileEx");
+      CloseHandle(mmap_handle);
+      return  -1;
+    }
+
+  return 1;
+}
+
+const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;