| 1 | /* $Id: oslibmem.cpp,v 1.5 2002-09-24 15:15:27 sandervl Exp $ */
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| 2 | /*
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| 3 | * Wrappers for OS/2 Dos* API
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| 4 | *
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| 5 | * Copyright 1998-2002 Sander van Leeuwen (sandervl@xs4all.nl)
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| 6 | * Copyright 2000 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 7 | *
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| 8 | * Project Odin Software License can be found in LICENSE.TXT
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| 9 | *
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| 10 | */
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| 11 |
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| 12 |
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| 13 |
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| 14 | /*******************************************************************************
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| 15 | * Header Files *
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| 16 | *******************************************************************************/
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| 17 | #define INCL_BASE
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| 18 | #define INCL_DOSEXCEPTIONS
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| 19 | #define INCL_DOSMEMMGR
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| 20 | #define INCL_DOSPROCESS
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| 21 | #define INCL_DOSFILEMGR
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| 22 | #define INCL_DOSERRORS
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| 23 | #define INCL_DOSDEVIOCTL
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| 24 | #define INCL_DOSDEVICES
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| 25 | #define INCL_NPIPES
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| 26 | #include <os2wrap.h> //Odin32 OS/2 api wrappers
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| 27 | #include <stdlib.h>
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| 28 | #include <stdio.h>
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| 29 | #include <string.h>
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| 30 | #include <ctype.h>
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| 31 | #include <win32api.h>
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| 32 | #include <winconst.h>
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| 33 | #include <win\winioctl.h>
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| 34 | #include <misc.h>
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| 35 | #include "initterm.h"
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| 36 | #include "oslibdos.h"
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| 37 | #include "oslibmem.h"
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| 38 | #include "dosqss.h"
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| 39 | #include "win32k.h"
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| 40 |
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| 41 | #define DBG_LOCALLOG DBG_oslibmem
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| 42 | #include "dbglocal.h"
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| 43 |
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| 44 | //******************************************************************************
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| 45 | //TODO: Assumes entire memory range has the same protection flags!
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| 46 | //TODO: Check if this works for code aliases...
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| 47 | //******************************************************************************
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| 48 | DWORD OSLibDosAliasMem(LPVOID pb, ULONG cb, LPVOID *ppbAlias, ULONG fl)
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| 49 | {
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| 50 | DWORD rc;
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| 51 | DWORD attr;
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| 52 | DWORD size = cb;
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| 53 |
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| 54 | cb = (cb-1) & ~0xfff;
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| 55 | cb+= PAGE_SIZE;
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| 56 |
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| 57 | rc = DosQueryMem(pb, &size, &attr);
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| 58 | if(rc) {
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| 59 | dprintf(("!ERROR!: OSLibDosAliasMem: DosQueryMem %x %x return %d", pb, size, rc));
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| 60 | return rc;
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| 61 | }
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| 62 | size = (size-1) & ~0xfff;
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| 63 | size+= PAGE_SIZE;
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| 64 | if(size != cb) {
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| 65 | dprintf(("!WARNING!: OSLibDosAliasMem: size != cb (%x!=%x)!!!!!!!!", size, cb));
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| 66 | //ignore this and continue return 5;
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| 67 | attr = fl; //just use original protection flags (NOT CORRECT)
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| 68 | }
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| 69 | attr &= (PAG_READ|PAG_WRITE|PAG_EXECUTE|PAG_GUARD|PAG_DEFAULT);
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| 70 | if(attr != fl) {
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| 71 | rc = DosSetMem(pb, size, fl);
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| 72 | if(rc) {
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| 73 | dprintf(("!ERROR!: OSLibDosAliasMem: DosSetMem %x %x return %d", pb, size, rc));
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| 74 | attr = fl;
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| 75 | //just continue for now
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| 76 | //return rc;
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| 77 | }
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| 78 | }
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| 79 | rc = DosAliasMem(pb, cb, ppbAlias, 2);
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| 80 | if(rc) {
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| 81 | dprintf(("!ERROR!: OSLibDosAliasMem: DosAliasMem %x %x returned %d", pb, cb, rc));
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| 82 | return rc;
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| 83 | }
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| 84 | if(attr != fl) {
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| 85 | rc = DosSetMem(pb, size, attr);
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| 86 | if(rc) {
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| 87 | dprintf(("!ERROR!: OSLibDosAliasMem: DosSetMem (2) %x %x return %d", pb, size, rc));
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| 88 | return rc;
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| 89 | }
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| 90 | }
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| 91 | return 0;
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| 92 | }
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| 93 | //******************************************************************************
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| 94 | //Allocate memory aligned at 64kb boundary
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| 95 | //******************************************************************************
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| 96 | DWORD OSLibDosAllocMem(LPVOID *lplpMemAddr, DWORD cbSize, DWORD flFlags, BOOL fLowMemory)
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| 97 | {
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| 98 | PVOID pvMemAddr;
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| 99 | DWORD offset;
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| 100 | APIRET rc;
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| 101 | BOOL fMemFlags = flAllocMem;
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| 102 |
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| 103 | //Override low/high memory flag if necessary
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| 104 | if(fLowMemory) {
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| 105 | fMemFlags = 0;
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| 106 | }
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| 107 | /*
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| 108 | * Let's try use the extended DosAllocMem API of Win32k.sys.
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| 109 | */
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| 110 | if (libWin32kInstalled())
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| 111 | {
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| 112 | rc = DosAllocMemEx(lplpMemAddr, cbSize, flFlags | fMemFlags | OBJ_ALIGN64K);
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| 113 | if (rc != ERROR_NOT_SUPPORTED) /* This call was stubbed until recently. */
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| 114 | return rc;
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| 115 | }
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| 116 |
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| 117 | /*
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| 118 | * If no or old Win32k fall back to old method.
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| 119 | */
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| 120 |
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| 121 | rc = DosAllocMem(&pvMemAddr, cbSize, flFlags | fMemFlags);
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| 122 | if(rc) {
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| 123 | dprintf(("!ERROR!: DosAllocMem failed with rc %d", rc));
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| 124 | return rc;
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| 125 | }
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| 126 | // already 64k aligned ?
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| 127 | if((ULONG) pvMemAddr & 0xFFFF)
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| 128 | {
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| 129 | ULONG addr64kb;
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| 130 |
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| 131 | //free misaligned allocated memory
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| 132 | DosFreeMem(pvMemAddr);
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| 133 |
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| 134 | //Allocate 64kb more so we can round the address to a 64kb aligned value
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| 135 | rc = DosAllocMem((PPVOID)&addr64kb, cbSize + 64*1024, (flFlags & ~PAG_COMMIT) | fMemFlags);
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| 136 | if(rc) {
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| 137 | dprintf(("!ERROR!: DosAllocMem failed with rc %d", rc));
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| 138 | return rc;
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| 139 | }
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| 140 | dprintf(("Allocate aligned memory %x -> %x", addr64kb, (addr64kb + 0xFFFF) & ~0xFFFF));
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| 141 |
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| 142 | if(addr64kb & 0xFFFF) {
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| 143 | addr64kb = (addr64kb + 0xFFFF) & ~0xFFFF;
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| 144 | }
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| 145 | pvMemAddr = (PVOID)addr64kb;
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| 146 |
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| 147 | //and set the correct page flags for the request range
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| 148 | if((flFlags & ~PAG_COMMIT) != flFlags) {
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| 149 | rc = DosSetMem(pvMemAddr, cbSize, flFlags);
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| 150 | if(rc) {
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| 151 | dprintf(("!ERROR!: DosSetMem failed with rc %d", rc));
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| 152 | return rc;
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| 153 | }
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| 154 | }
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| 155 | }
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| 156 |
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| 157 | if(!rc)
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| 158 | *lplpMemAddr = pvMemAddr;
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| 159 |
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| 160 | return rc;
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| 161 | }
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| 162 | //******************************************************************************
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| 163 | //Locate the base page of a memory allocation (the page with the PAG_BASE attribute)
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| 164 | //******************************************************************************
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| 165 | PVOID OSLibDosFindMemBase(LPVOID lpMemAddr)
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| 166 | {
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| 167 | ULONG ulAttr, ulSize, ulAddr;
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| 168 | APIRET rc;
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| 169 |
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| 170 | rc = DosQueryMem(lpMemAddr, &ulSize, &ulAttr);
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| 171 | if(rc != NO_ERROR) {
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| 172 | dprintf(("!ERROR!: OSLibDosFindMemBase: DosQueryMem %x failed with rc %d", lpMemAddr, rc));
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| 173 | return lpMemAddr;
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| 174 | }
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| 175 | if(!(ulAttr & PAG_BASE)) {
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| 176 | //Not the base of the initial allocation (can happen due to alignment) or app
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| 177 | //passing address inside memory allocation range
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| 178 | ulAddr = (DWORD)lpMemAddr & ~0xFFF;
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| 179 | ulAddr -= PAGE_SIZE;
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| 180 |
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| 181 | while(ulAddr > 0)
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| 182 | {
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| 183 | rc = DosQueryMem((PVOID)ulAddr, &ulSize, &ulAttr);
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| 184 | if(rc) {
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| 185 | dprintf(("!ERROR!: OSLibDosFindMemBase: DosQueryMem %x failed with rc %d", lpMemAddr, rc));
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| 186 | DebugInt3();
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| 187 | return NULL;
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| 188 | }
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| 189 | if(ulAttr & PAG_BASE) {
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| 190 | //Memory below the 512 MB boundary is always aligned at 64kb and VirtualAlloc only
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| 191 | //returns high memory (if OS/2 version supports it)
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| 192 | //If it is above the 512 MB boundary, then we must make sure the right base address
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| 193 | //is returned. VirtualAlloc allocates extra memory to make sure it can return addresses
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| 194 | //aligned at 64kb. If extra pages are needed, then the allocation base is inside
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| 195 | //the filler region. In that case we must return the next 64kb address as base.
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| 196 | if(ulAddr > MEM_TILED_CEILING) {
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| 197 | ulAddr = (ulAddr + 0xFFFF) & ~0xFFFF;
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| 198 | }
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| 199 | lpMemAddr = (PVOID)ulAddr;
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| 200 | break;
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| 201 | }
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| 202 | ulAddr -= PAGE_SIZE;
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| 203 | }
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| 204 | }
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| 205 | return lpMemAddr;
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| 206 | }
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| 207 | //******************************************************************************
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| 208 | //******************************************************************************
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| 209 | DWORD OSLibDosFreeMem(LPVOID lpMemAddr)
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| 210 | {
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| 211 | ULONG ulAttr, ulSize, ulAddr;
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| 212 | APIRET rc;
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| 213 |
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| 214 | ulAddr = (DWORD)lpMemAddr & ~0xFFF;
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| 215 | ulSize = 0x1000;
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| 216 |
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| 217 | //Find base within previous 64kb (alignment can add filler pages)
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| 218 | for(int i=0;i<16;i++) {
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| 219 | rc = DosQueryMem((PVOID)ulAddr, &ulSize, &ulAttr);
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| 220 | if(rc != NO_ERROR) {
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| 221 | dprintf(("!ERROR!: OSLibDosFreeMem: DosQueryMem %x failed with rc %d", lpMemAddr, rc));
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| 222 | i = 16; //fail
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| 223 | break;
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| 224 | }
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| 225 | if(ulAttr & PAG_BASE) {
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| 226 | break;
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| 227 | }
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| 228 | ulAddr -= PAGE_SIZE;
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| 229 | }
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| 230 | if(i == 16) {
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| 231 | //oh, oh. didn't find base; shouldn't happen!!
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| 232 | dprintf(("!ERROR!: OSLibDosFreeMem: Unable to find base of %x", lpMemAddr));
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| 233 | DebugInt3();
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| 234 | }
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| 235 | else {
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| 236 | lpMemAddr = (PVOID)ulAddr;
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| 237 | }
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| 238 | return DosFreeMem(lpMemAddr);
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| 239 | }
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| 240 | //******************************************************************************
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| 241 | //NOTE: If name == NULL, allocated gettable unnamed shared memory
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| 242 | //OS/2 returns error 123 (invalid name) if the shared memory name includes
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| 243 | //colons. We need to replace them with underscores.
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| 244 | //******************************************************************************
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| 245 | DWORD OSLibDosAllocSharedMem(LPVOID *lplpMemAddr, DWORD size, DWORD flags, LPSTR name)
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| 246 | {
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| 247 | APIRET rc;
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| 248 | char *sharedmemname = NULL, *tmp;
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| 249 |
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| 250 | if(name) {
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| 251 | sharedmemname = (char *)malloc(strlen(name) + 16);
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| 252 | strcpy(sharedmemname, "\\SHAREMEM\\");
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| 253 | strcat(sharedmemname, name);
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| 254 | }
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| 255 | else flags |= OBJ_GETTABLE;
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| 256 |
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| 257 | //SvL: Colons are unacceptable in shared memory names (for whatever reason)
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| 258 | tmp = sharedmemname;
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| 259 | while(*tmp != 0) {
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| 260 | if(*tmp == ':') {
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| 261 | *tmp = '_';
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| 262 | }
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| 263 | tmp++;
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| 264 | }
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| 265 |
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| 266 | rc = DosAllocSharedMem(lplpMemAddr, sharedmemname, size, flags);
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| 267 | if(name) {
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| 268 | free(sharedmemname);
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| 269 | }
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| 270 | return rc;
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| 271 | }
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| 272 | //******************************************************************************
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| 273 | //NOTE: If name == NULL, assume gettable unnamed shared memory
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| 274 | //******************************************************************************
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| 275 | DWORD OSLibDosGetNamedSharedMem(LPVOID *lplpMemAddr, LPSTR name)
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| 276 | {
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| 277 | APIRET rc;
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| 278 | char *sharedmemname = NULL, *tmp;
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| 279 |
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| 280 | if(name) {
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| 281 | sharedmemname = (char *)malloc(strlen(name) + 16);
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| 282 | strcpy(sharedmemname, "\\SHAREMEM\\");
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| 283 | strcat(sharedmemname, name);
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| 284 |
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| 285 | //SvL: Colons are unacceptable in shared memory names (for whatever reason)
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| 286 | tmp = sharedmemname;
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| 287 | while(*tmp != 0) {
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| 288 | if(*tmp == ':') {
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| 289 | *tmp = '_';
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| 290 | }
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| 291 | tmp++;
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| 292 | }
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| 293 | rc = DosGetNamedSharedMem(lplpMemAddr, sharedmemname, PAG_READ|PAG_WRITE);
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| 294 | if(name) {
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| 295 | free(sharedmemname);
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| 296 | }
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| 297 | }
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| 298 | else rc = DosGetSharedMem((LPVOID)*(DWORD *)lplpMemAddr, PAG_READ|PAG_WRITE);
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| 299 |
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| 300 | return rc;
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| 301 | }
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| 302 | //******************************************************************************
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| 303 | //******************************************************************************
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| 304 | DWORD OSLibDosQueryMem(LPVOID lpMemAddr, DWORD *lpRangeSize, DWORD *lpAttr)
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| 305 | {
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| 306 | return DosQueryMem(lpMemAddr, lpRangeSize, lpAttr);
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| 307 | }
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| 308 | //******************************************************************************
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| 309 | //******************************************************************************
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| 310 | DWORD OSLibDosSetMem(LPVOID lpMemAddr, DWORD size, DWORD flags)
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| 311 | {
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| 312 | APIRET rc;
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| 313 |
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| 314 | rc = DosSetMem(lpMemAddr, size, flags);
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| 315 | switch(rc) {
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| 316 | case ERROR_INVALID_ADDRESS:
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| 317 | return OSLIB_ERROR_INVALID_ADDRESS;
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| 318 | case ERROR_ACCESS_DENIED:
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| 319 | return OSLIB_ERROR_ACCESS_DENIED;
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| 320 | default:
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| 321 | return rc;
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| 322 | }
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| 323 | }
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| 324 | //******************************************************************************
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| 325 | //******************************************************************************
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