1 files changed, 148 insertions, 0 deletions
diff --git a/xc/programs/Xserver/hw/xfree86/loader/os2funcs.c b/xc/programs/Xserver/hw/xfree86/loader/os2funcs.c
new file mode 100644
index 000000000..3e66788b3
--- /dev/null
+++ b/xc/programs/Xserver/hw/xfree86/loader/os2funcs.c
@@ -0,0 +1,148 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/os2funcs.c,v 1.4 1997/03/10 10:12:22 hohndel Exp $ */
+/*
+ * (c) Copyright 1997 by Sebastien Marineau
+ *                      <marineau@genie.uottawa.ca>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * SEBASTIEN MARINEAU BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Sebastien Marineau shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from Sebastien Marineau.
+ *
+ */
+
+
+/* Implements some OS/2 memory allocation functions to allow 
+ * execute permissions for modules. We allocate some mem using DosAllocMem
+ * and then use the EMX functions to create a heap from which we allocate
+ * the requests. We create a heap of 2 megs, hopefully enough for now.
+ */
+
+#define INCL_DOSMEMMGR
+#include <os2.h>
+#include <sys/types.h>
+#include <umalloc.h>
+#include "os.h"
+
+#define RESERVED_BLOCKS 512  /* reserve 2MB memory for modules */
+
+void *os2loader_AddToHeap(Heap_t, size_t *, int *);
+void os2loader_RemoveFromHeap(Heap_t, void *, size_t);
+
+PVOID os2loader_CommitedTop;
+PVOID os2loader_baseAddress;
+Heap_t os2loader_heapAddress;
+int os2loader_TotalCommitedBlocks;
+
+void *os2loader_calloc(size_t num_elem, size_t size_elem){
+APIRET rc;
+int ret;
+static BOOL FirstTime=TRUE;
+void *allocMem;
+
+if(FirstTime){
+	rc=DosAllocMem(&os2loader_baseAddress,RESERVED_BLOCKS * 4096, 
+                PAG_READ | PAG_WRITE | PAG_EXECUTE);
+	if(rc!=0) {
+		ErrorF("OS/2AllocMem: Could not create heap for module loading\n");
+		return(NULL);
+		}
+
+/* Now commit the first 128Kb, the rest will be done dynamically */
+        rc=DosSetMem(os2loader_baseAddress,32*4096, PAG_DEFAULT | PAG_COMMIT); 
+        	if(rc!=0) {
+		ErrorF("OS/2AllocMem: Could not commit heap memory!\n");
+		DosFreeMem(os2loader_baseAddress);
+                return(NULL);
+		}
+        os2loader_CommitedTop=os2loader_baseAddress + 32*4096;
+        os2loader_TotalCommitedBlocks=32;
+	ErrorF("OS2Alloc: allocated mem for heap, rc=%d, addr=%p\n",rc,os2loader_baseAddress);
+
+	if((os2loader_heapAddress=_ucreate(os2loader_baseAddress,32*4096,_BLOCK_CLEAN,
+		_HEAP_REGULAR,os2loader_AddToHeap, os2loader_RemoveFromHeap))==NULL){
+		ErrorF("OS/2AllocMem: Could not create heap for loadable modules\n");
+		DosFreeMem(os2loader_baseAddress);
+		return(NULL);
+		}
+	
+	ret=_uopen(os2loader_heapAddress);
+	if(ret!=0){
+		ErrorF("OS/2AllocMem: Could not open heap for loadable modules\n");
+		ret=_udestroy(os2loader_heapAddress,_FORCE);
+		DosFreeMem(os2loader_baseAddress);
+		return(NULL);
+		}
+	FirstTime=FALSE;
+	ErrorF("OS/2: done creating heap, addr=%p\n",os2loader_heapAddress);
+	}
+
+allocMem=_ucalloc(os2loader_heapAddress,num_elem,size_elem);
+return(allocMem);
+}
+
+
+void *os2loader_AddToHeap(Heap_t H, size_t *new_size, int *PCLEAN)
+{
+PVOID NewBase;
+long adjusted_size;
+long blocks;
+APIRET rc;
+
+   if(H != os2loader_heapAddress){
+      ErrorF("OS/2: Tried to grow an inexistant heap, p=%08x\n",H);
+      return (NULL);
+      }
+   NewBase=os2loader_CommitedTop;
+   adjusted_size = (*new_size/65536) * 65536;
+   if((*new_size % 65536)> 0 ) adjusted_size += 65536;
+   blocks=adjusted_size / 4096;
+   if((os2loader_TotalCommitedBlocks + blocks)>RESERVED_BLOCKS){
+      ErrorF("OS/2 GrowHeap: Could not allocate any more memory for module loading!\n");
+      ErrorF("Total reserved memory of %ld bytes is exhausted\n",RESERVED_BLOCKS * 4096);
+      return(NULL);
+      }
+   rc = DosSetMem(NewBase, adjusted_size, PAG_DEFAULT | PAG_COMMIT);
+   if(rc!=0) {
+	ErrorF("OS/2 GrowHeap: Could not grow heap! Requested size %d, \n", adjusted_size);
+        return(NULL);
+	}
+   os2loader_CommitedTop+=adjusted_size;
+   os2loader_TotalCommitedBlocks += blocks;
+   *PCLEAN = _BLOCK_CLEAN;
+   *new_size=adjusted_size;
+   ErrorF("OS/2: Added %d bytes to heap, addr %08x\n",adjusted_size, NewBase);
+   return(NewBase);
+}
+
+void os2loader_RemoveFromHeap(Heap_t H, void *memory, size_t size)
+{
+   if(H != os2loader_heapAddress){
+      ErrorF("OS/2: Tried to shrink an inexistant heap, p=%08x\n",H);
+      return;
+      }
+/* Currently we do nothing, as we do not keep track of the commited memory */
+ErrorF("OS/2: module heap requests that heap memory be deallocated. Request ignored\n");
+
+/* Only handle it if it is the base address */
+   if(memory == os2loader_baseAddress) {
+        DosFreeMem(os2loader_baseAddress);
+        ErrorF("OS/2: total heap area was deallocated\n");
+        }
+}