349 lines
8.5 KiB
C
349 lines
8.5 KiB
C
/*
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* Win32 kernel functions
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*
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* Copyright 1995 Martin von Loewis and Cameron Heide
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <stdlib.h>
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#include "windows.h"
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#include "winerror.h"
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#include "winbase.h"
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#include "handle32.h"
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#include "stddebug.h"
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#include "debug.h"
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#ifndef PROT_NONE /* FreeBSD doesn't define PROT_NONE */
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#define PROT_NONE 0
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#endif
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typedef struct {
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caddr_t ptr;
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long size;
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} virtual_mem_t;
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typedef struct _VRANGE_OBJECT
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{
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DWORD start;
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DWORD size;
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struct _VRANGE_OBJECT *next;
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} VRANGE_OBJECT;
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virtual_mem_t *mem = 0;
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int mem_count = 0;
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int mem_used = 0;
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/*******************************************************************
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* VRANGE
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* A VRANGE denotes a contiguous part of the address space. It is used
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* for house keeping, and will be obtained by higher-level memory allocation
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* functions (VirtualAlloc, MapViewOfFile)
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* There can be at most one VRANGE object covering any address at any time.
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* Currently, all VRANGE objects are stored in a sorted list. Wine does not
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* attempt to give a complete list of in-use address ranges, only those
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* allocated via Win32.
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* An exception is IsVrangeFree, which should test the OS specific
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* mappings, too. As a default, an range not known to be allocated is
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* considered free.
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*******************************************************************/
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VRANGE_OBJECT *MEMORY_ranges=0;
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VRANGE_OBJECT *MEMORY_FindVrange(DWORD start)
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{
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VRANGE_OBJECT *range;
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for(range=MEMORY_ranges;range && range->start<start;range=range->next)
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{
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if(range->start<start && start<range->start+range->size)
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return range;
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}
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return 0;
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}
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static int MEMORY_IsVrangeFree(DWORD start,DWORD size)
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{
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DWORD end;
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VRANGE_OBJECT *range;
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if(!size)
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return 1;
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/* First, check our lists*/
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end=start+size;
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for(range=MEMORY_ranges;range && range->start<start;range=range->next)
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{
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if((range->start<start && start<range->start+range->size) ||
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(range->start<end && end<range->start+range->size))
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return 0;
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}
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/* Now, check the maps that are not under our control */
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#ifdef linux
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{
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FILE *f=fopen("/proc/self/maps","r");
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char line[80];
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int found=0;
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while(1)
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{
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char *it;
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int lower,upper;
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if(!fgets(line,sizeof(line),f))
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break;
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it=line;
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lower=strtoul(it,&it,16);
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if(*it++!='-')
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fprintf(stderr,"Format of /proc/self/maps changed\n");
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upper=strtoul(it,&it,16);
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if((lower<start && start<upper) || (lower<start+size && start+size<upper))
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{
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found=1;
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break;
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}
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}
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fclose(f);
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return !found;
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}
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#else
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{
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static int warned=0;
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if(!warned)
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{
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fprintf(stdnimp, "Don't know how to perform MEMORY_IsVrangeFree on "
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"this system.\n Please fix\n");
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warned=0;
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}
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return 1;
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}
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#endif
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}
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/* FIXME: might need to consolidate ranges */
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void MEMORY_InsertVrange(VRANGE_OBJECT *r)
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{
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VRANGE_OBJECT *it,*last;
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if(!MEMORY_ranges || r->start<MEMORY_ranges->start)
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{
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r->next=MEMORY_ranges;
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MEMORY_ranges=r;
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}
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for(it=MEMORY_ranges,last=0;it && it->start<r->start;it=it->next)
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last=it;
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r->next=last->next;
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last->next=r;
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}
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VRANGE_OBJECT *MEMORY_AllocVrange(int start,int size)
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{
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VRANGE_OBJECT *ret=CreateKernelObject(sizeof(VRANGE_OBJECT));
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MEMORY_InsertVrange(ret);
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return ret;
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}
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void MEMORY_ReleaseVrange(VRANGE_OBJECT *r)
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{
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VRANGE_OBJECT *it;
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if(MEMORY_ranges==r)
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{
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MEMORY_ranges=r->next;
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ReleaseKernelObject(r);
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return;
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}
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for(it=MEMORY_ranges;it;it=it->next)
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if(it->next==r)break;
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if(!it)
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{
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fprintf(stderr,"VRANGE not found\n");
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return;
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}
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it->next=r->next;
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ReleaseKernelObject(r);
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}
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/***********************************************************************
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* VirtualAlloc (KERNEL32.548)
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*/
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int TranslateProtectionFlags(DWORD);
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LPVOID VirtualAlloc(LPVOID lpvAddress, DWORD cbSize,
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DWORD fdwAllocationType, DWORD fdwProtect)
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{
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caddr_t ptr;
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int i;
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virtual_mem_t *tmp_mem;
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int prot;
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static int fdzero = -1;
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if (fdzero == -1)
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{
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if ((fdzero = open( "/dev/zero", O_RDONLY )) == -1)
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{
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perror( "/dev/zero: open" );
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return (LPVOID)NULL;
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}
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}
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dprintf_win32(stddeb, "VirtualAlloc: size = %ld, address=%p\n", cbSize, lpvAddress);
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if (fdwAllocationType & MEM_RESERVE || !lpvAddress) {
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ptr = mmap((void *)((((unsigned long)lpvAddress-1) & 0xFFFF0000L)
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+ 0x00010000L),
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cbSize, PROT_NONE, MAP_PRIVATE, fdzero, 0 );
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if (ptr == (caddr_t) -1) {
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dprintf_win32(stddeb, "VirtualAlloc: returning NULL");
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return (LPVOID) NULL;
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}
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if (lpvAddress && ((unsigned long)ptr & 0xFFFF0000L)) {
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munmap(ptr, cbSize);
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cbSize += 65535;
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ptr = mmap(lpvAddress, cbSize,
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PROT_NONE, MAP_PRIVATE, fdzero, 0 );
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if (ptr == (caddr_t) -1) {
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dprintf_win32(stddeb, "VirtualAlloc: returning NULL");
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return (LPVOID) NULL;
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}
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ptr = (void *)((((unsigned long)ptr-1) & 0xFFFF0000L)+0x00010000L);
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}
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/* remember the size for VirtualFree since it's going to be handed
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a zero len */
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if (ptr) {
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if (mem_count == mem_used) {
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tmp_mem = realloc(mem,(mem_count+10)*sizeof(virtual_mem_t));
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if (!tmp_mem) return 0;
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mem = tmp_mem;
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memset(mem+mem_count, 0, 10*sizeof(virtual_mem_t));
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mem_count += 10;
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}
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for (i=0; i<mem_count; i++) {
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if (!(mem+i)->ptr) {
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(mem+i)->ptr = ptr;
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(mem+i)->size = cbSize;
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mem_used++;
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break;
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}
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}
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}
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} else {
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ptr = lpvAddress;
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}
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if (fdwAllocationType & MEM_COMMIT) {
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prot = TranslateProtectionFlags(fdwProtect &
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~(PAGE_GUARD | PAGE_NOCACHE));
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mprotect(ptr, cbSize, prot);
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}
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#if 0
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/* kludge for gnu-win32 */
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if (fdwAllocationType & MEM_RESERVE) return sbrk(0);
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ptr = malloc(cbSize + 65536);
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if(ptr)
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{
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/* Round it up to the next 64K boundary and zero it.
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*/
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ptr = (void *)(((unsigned long)ptr & 0xFFFF0000L) + 0x00010000L);
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memset(ptr, 0, cbSize);
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}
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#endif
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dprintf_win32(stddeb, "VirtualAlloc: got pointer %p\n", ptr);
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return ptr;
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}
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/***********************************************************************
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* VirtualFree (KERNEL32.550)
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*/
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BOOL32 VirtualFree(LPVOID lpvAddress, DWORD cbSize, DWORD fdwFreeType)
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{
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int i;
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if (fdwFreeType & MEM_RELEASE) {
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for (i=0; i<mem_count; i++) {
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if ((mem+i)->ptr == lpvAddress) {
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munmap(lpvAddress, (mem+i)->size);
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(mem+i)->ptr = 0;
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mem_used--;
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break;
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}
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}
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} else {
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mprotect(lpvAddress, cbSize, PROT_NONE);
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}
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#if 0
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if(lpvAddress)
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free(lpvAddress);
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#endif
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return 1;
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}
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/***********************************************************************
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* VirtualQuery (KERNEL32.554)
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*/
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BOOL32 VirtualQuery(LPCVOID address,LPMEMORY_BASIC_INFORMATION buf,DWORD len)
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{
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/* FIXME: fill out structure ... */
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return TRUE;
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}
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int TranslateProtectionFlags(DWORD protection_flags)
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{
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int prot;
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switch(protection_flags) {
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case PAGE_READONLY:
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prot=PROT_READ;
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break;
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case PAGE_READWRITE:
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prot=PROT_READ|PROT_WRITE;
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break;
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case PAGE_WRITECOPY:
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prot=PROT_WRITE;
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break;
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case PAGE_EXECUTE:
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prot=PROT_EXEC;
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break;
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case PAGE_EXECUTE_READ:
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prot=PROT_EXEC|PROT_READ;
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break;
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case PAGE_EXECUTE_READWRITE:
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prot=PROT_EXEC|PROT_READ|PROT_WRITE;
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break;
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case PAGE_EXECUTE_WRITECOPY:
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prot=PROT_EXEC|PROT_WRITE;
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break;
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case PAGE_NOACCESS:
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default:
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prot=PROT_NONE;
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break;
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}
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return prot;
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}
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/******************************************************************
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* IsBadReadPtr
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*/
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BOOL WIN32_IsBadReadPtr(void* ptr, unsigned int bytes)
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{
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dprintf_global(stddeb,"IsBadReadPtr(%x,%x)\n",(int)ptr,bytes);
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/* FIXME: Should make check based on actual mappings, here */
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return FALSE;
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}
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/******************************************************************
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* IsBadWritePtr
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*/
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BOOL WIN32_IsBadWritePtr(void* ptr, unsigned int bytes)
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{
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dprintf_global(stddeb,"IsBadWritePtr(%x,%x)\n",(int)ptr,bytes);
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/* FIXME: Should make check based on actual mappings, here */
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return FALSE;
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}
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/******************************************************************
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* IsBadWritePtr
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*/
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BOOL WIN32_IsBadCodePtr(void* ptr, unsigned int bytes)
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{
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dprintf_global(stddeb,"IsBadCodePtr(%x,%x)\n",(int)ptr,bytes);
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/* FIXME: Should make check based on actual mappings, here */
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return FALSE;
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}
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