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/* $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");
}
}
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