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Changed global DOS_LOL into function DOSMEM_LOL() in order to operate 

on the correct address space. Added DOSMEM_MovePointers() that
relocates selectors when the DOS address space changes (i.e. when
dosmod is spawned, particularly from Win16 apps that uses DPMI to
execute real-mode code). More complete DOS device implementation.
This commit is contained in:
Ove Kaaven 1999-05-22 10:41:28 +00:00 committed by Alexandre Julliard
parent e54d4d15c4
commit 59c827325c
4 changed files with 499 additions and 26 deletions
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2
include/miscemu.h
View File

@ -86,8 +86,8 @@ extern DWORD DOSMEM_CollateTable;
extern DWORD DOSMEM_ErrorCall;
extern DWORD DOSMEM_ErrorBuffer;
extern struct _DOS_LISTOFLISTS * DOS_LOL;
extern DWORD DOS_LOLSeg;
extern struct _DOS_LISTOFLISTS * DOSMEM_LOL();
extern BOOL DOSMEM_Init(HMODULE16 hModule);
extern void DOSMEM_Tick(WORD timer);

485
msdos/devices.c
View File

@ -9,6 +9,7 @@
#include "wine/winbase16.h"
#include "msdos.h"
#include "miscemu.h"
#include "dosexe.h"
#include "debug.h"
#include "pshpack1.h"
@ -21,9 +22,35 @@ typedef struct {
RMCBPROC interrupt;
} WINEDEV;
typedef struct {
BYTE size; /* length of header + data */
BYTE unit; /* unit (block devices only) */
BYTE command;
WORD status;
BYTE reserved[8];
} REQUEST_HEADER;
typedef struct {
REQUEST_HEADER hdr;
BYTE media; /* media descriptor from BPB */
SEGPTR buffer;
WORD count; /* byte/sector count */
WORD sector; /* starting sector (block devices) */
DWORD volume; /* volume ID (block devices) */
} REQ_IO;
typedef struct {
REQUEST_HEADER hdr;
BYTE data;
} REQ_SAFEINPUT;
#include "poppack.h"
DOS_LISTOFLISTS * DOS_LOL;
#define REQ_SCRATCH sizeof(REQ_IO)
#define SYSTEM_STRATEGY_NUL 0x0100
#define SYSTEM_STRATEGY_CON 0x0101
DWORD DOS_LOLSeg;
#define NONEXT ((DWORD)-1)
@ -33,51 +60,326 @@ DWORD DOS_LOLSeg;
#define ATTR_NUL 0x0004
#define ATTR_CLOCK 0x0008
#define ATTR_FASTCON 0x0010
#define ATTR_RAW 0x0020
#define ATTR_NOTEOF 0x0040
#define ATTR_DEVICE 0x0080
#define ATTR_REMOVABLE 0x0800
#define ATTR_NONIBM 0x2000 /* block devices */
#define ATTR_UNTILBUSY 0x2000 /* char devices */
#define ATTR_IOCTL 0x4000
#define ATTR_CHAR 0x8000
#define LJMP 0x9a
#define CMD_INIT 0
#define CMD_MEDIACHECK 1 /* block devices */
#define CMD_BUILDBPB 2 /* block devices */
#define CMD_INIOCTL 3
#define CMD_INPUT 4 /* read data */
#define CMD_SAFEINPUT 5 /* "non-destructive input no wait", char devices */
#define CMD_INSTATUS 6 /* char devices */
#define CMD_INFLUSH 7 /* char devices */
#define CMD_OUTPUT 8 /* write data */
#define CMD_SAFEOUTPUT 9 /* write data with verify */
#define CMD_OUTSTATUS 10 /* char devices */
#define CMD_OUTFLUSH 11 /* char devices */
#define CMD_OUTIOCTL 12
#define CMD_DEVOPEN 13
#define CMD_DEVCLOSE 14
#define CMD_REMOVABLE 15 /* block devices */
#define CMD_UNTILBUSY 16 /* output until busy */
static void WINAPI nul_strategy(CONTEXT*ctx)
{
}
#define STAT_MASK 0x00FF
#define STAT_DONE 0x0100
#define STAT_BUSY 0x0200
#define STAT_ERROR 0x8000
static void WINAPI nul_interrupt(CONTEXT*ctx)
{
}
#define LJMP 0xea
static void WINAPI con_strategy(CONTEXT*ctx)
{
}
#define DEV0_OFS (sizeof(DOS_LISTOFLISTS) - sizeof(DOS_DEVICE_HEADER))
#define DEV1_OFS (DEV0_OFS + sizeof(WINEDEV))
#define ALLDEV_OFS (DEV1_OFS + sizeof(devs))
#define ALL_OFS (ALLDEV_OFS + REQ_SCRATCH)
static void WINAPI con_interrupt(CONTEXT*ctx)
{
}
/* prototypes */
static void WINAPI nul_strategy(CONTEXT*ctx);
static void WINAPI nul_interrupt(CONTEXT*ctx);
static void WINAPI con_strategy(CONTEXT*ctx);
static void WINAPI con_interrupt(CONTEXT*ctx);
/* the device headers */
#define STRATEGY_OFS sizeof(DOS_DEVICE_HEADER)
#define INTERRUPT_OFS STRATEGY_OFS+5
static DOS_DEVICE_HEADER dev_nul_hdr={
NONEXT,
ATTR_CHAR|ATTR_NUL,
ATTR_CHAR|ATTR_NUL|ATTR_DEVICE,
STRATEGY_OFS,INTERRUPT_OFS,
"NUL "
};
static WINEDEV devs={
static WINEDEV devs[]={
{
{NONEXT,
ATTR_CHAR|ATTR_STDIN|ATTR_STDOUT|ATTR_FASTCON,
ATTR_CHAR|ATTR_STDIN|ATTR_STDOUT|ATTR_FASTCON|ATTR_NOTEOF|ATTR_DEVICE,
STRATEGY_OFS,INTERRUPT_OFS,
"CON "},
LJMP,con_strategy,
LJMP,con_interrupt
LJMP,con_interrupt}
};
#define nr_devs (sizeof(devs)/sizeof(WINEDEV))
static void InitListOfLists()
/* the device implementations */
static void do_lret(CONTEXT*ctx)
{
WORD *stack = CTX_SEG_OFF_TO_LIN(ctx, SS_reg(ctx), ESP_reg(ctx));
IP_reg(ctx) = *(stack++);
CS_reg(ctx) = *(stack++);
SP_reg(ctx) += 2*sizeof(WORD);
}
static void do_strategy(CONTEXT*ctx, int id, int extra)
{
REQUEST_HEADER *hdr = CTX_SEG_OFF_TO_LIN(ctx, ES_reg(ctx), EBX_reg(ctx));
void **hdr_ptr = DOSVM_GetSystemData(id);
if (!hdr_ptr) {
hdr_ptr = calloc(1,sizeof(void *)+extra);
DOSVM_SetSystemData(id, hdr_ptr);
}
*hdr_ptr = hdr;
do_lret(ctx);
}
static REQUEST_HEADER * get_hdr(int id, void**extra)
{
void **hdr_ptr = DOSVM_GetSystemData(id);
if (extra)
*extra = hdr_ptr ? (void*)(hdr_ptr+1) : (void *)NULL;
return hdr_ptr ? *hdr_ptr : (void *)NULL;
}
static void WINAPI nul_strategy(CONTEXT*ctx)
{
do_strategy(ctx, SYSTEM_STRATEGY_NUL, 0);
}
static void WINAPI nul_interrupt(CONTEXT*ctx)
{
REQUEST_HEADER *hdr = get_hdr(SYSTEM_STRATEGY_NUL, NULL);
/* eat everything and recycle nothing */
switch (hdr->command) {
case CMD_INPUT:
((REQ_IO*)hdr)->count = 0;
hdr->status = STAT_DONE;
break;
case CMD_SAFEINPUT:
hdr->status = STAT_DONE|STAT_BUSY;
break;
default:
hdr->status = STAT_DONE;
}
do_lret(ctx);
}
#define CON_BUFFER 128
static void WINAPI con_strategy(CONTEXT*ctx)
{
do_strategy(ctx, SYSTEM_STRATEGY_CON, sizeof(int));
}
static void WINAPI con_interrupt(CONTEXT*ctx)
{
int *scan;
REQUEST_HEADER *hdr = get_hdr(SYSTEM_STRATEGY_CON,(void **)&scan);
BIOSDATA *bios = DOSMEM_BiosData();
WORD CurOfs = bios->NextKbdCharPtr;
DOS_LISTOFLISTS *lol = DOSMEM_LOL();
BYTE *linebuffer = ((BYTE*)lol) + ALL_OFS;
BYTE *curbuffer = (lol->offs_unread_CON) ?
(((BYTE*)lol) + lol->offs_unread_CON) : (BYTE*)NULL;
DOS_DEVICE_HEADER *con = (DOS_DEVICE_HEADER*)(((BYTE*)lol) + DEV1_OFS);
LPDOSTASK lpDosTask = MZ_Current();
switch (hdr->command) {
case CMD_INPUT:
{
REQ_IO *io = (REQ_IO *)hdr;
WORD count = io->count, len = 0;
BYTE *buffer = CTX_SEG_OFF_TO_LIN(ctx,
SELECTOROF(io->buffer),
(DWORD)OFFSETOF(io->buffer));
hdr->status = STAT_BUSY;
/* first, check whether we already have data in line buffer */
if (curbuffer) {
/* yep, copy as much as we can */
BYTE data = 0;
while ((len<count) && (data != '\r')) {
data = *curbuffer++;
buffer[len++] = data;
}
if (data == '\r') {
/* line buffer emptied */
lol->offs_unread_CON = 0;
curbuffer = NULL;
/* if we're not in raw mode, call it a day*/
if (!(con->attr & ATTR_RAW)) {
hdr->status = STAT_DONE;
io->count = len;
break;
}
} else {
/* still some data left */
lol->offs_unread_CON = curbuffer - (BYTE*)lol;
/* but buffer was filled, we're done */
hdr->status = STAT_DONE;
io->count = len;
break;
}
}
/* if we're in raw mode, we just need to fill the buffer */
if (con->attr & ATTR_RAW) {
while (len<count) {
WORD data;
/* do we have a waiting scancode? */
if (*scan) {
/* yes, store scancode in buffer */
buffer[len++] = *scan;
*scan = 0;
if (len==count) break;
}
/* check for new keyboard input */
while (CurOfs == bios->FirstKbdCharPtr) {
/* no input available yet, so wait... */
DOSVM_Wait( -1, 0 );
}
/* read from keyboard queue (call int16?) */
data = ((WORD*)bios)[CurOfs];
CurOfs += 2;
if (CurOfs >= bios->KbdBufferEnd) CurOfs = bios->KbdBufferStart;
bios->NextKbdCharPtr = CurOfs;
/* if it's an extended key, save scancode */
if (LOBYTE(data) == 0) *scan = HIBYTE(data);
/* store ASCII char in buffer */
buffer[len++] = LOBYTE(data);
}
} else {
/* we're not in raw mode, so we need to do line input... */
while (TRUE) {
WORD data;
/* check for new keyboard input */
while (CurOfs == bios->FirstKbdCharPtr) {
/* no input available yet, so wait... */
DOSVM_Wait( -1, 0 );
}
/* read from keyboard queue (call int16?) */
data = ((WORD*)bios)[CurOfs];
CurOfs += 2;
if (CurOfs >= bios->KbdBufferEnd) CurOfs = bios->KbdBufferStart;
bios->NextKbdCharPtr = CurOfs;
if (LOBYTE(data) == '\r') {
/* it's the return key, we're done */
linebuffer[len++] = LOBYTE(data);
break;
}
else if (LOBYTE(data) >= ' ') {
/* a character */
if ((len+1)<CON_BUFFER) {
linebuffer[len] = LOBYTE(data);
WriteFile(lpDosTask->hConOutput, &linebuffer[len++], 1, NULL, NULL);
}
/* else beep, but I don't like noise */
}
else switch (LOBYTE(data)) {
case '\b':
if (len>0) {
len--;
WriteFile(lpDosTask->hConOutput, "\b \b", 3, NULL, NULL);
}
break;
}
}
if (len > count) {
/* save rest of line for later */
lol->offs_unread_CON = linebuffer - (BYTE*)lol + count;
len = count;
}
memcpy(buffer, linebuffer, len);
}
hdr->status = STAT_DONE;
io->count = len;
}
break;
case CMD_SAFEINPUT:
if (curbuffer) {
/* some line input waiting */
hdr->status = STAT_DONE;
((REQ_SAFEINPUT*)hdr)->data = *curbuffer;
}
else if (con->attr & ATTR_RAW) {
if (CurOfs == bios->FirstKbdCharPtr) {
/* no input */
hdr->status = STAT_DONE|STAT_BUSY;
} else {
/* some keyboard input waiting */
hdr->status = STAT_DONE;
((REQ_SAFEINPUT*)hdr)->data = ((BYTE*)bios)[CurOfs];
}
} else {
/* no line input */
hdr->status = STAT_DONE|STAT_BUSY;
}
break;
case CMD_INSTATUS:
if (curbuffer) {
/* we have data */
hdr->status = STAT_DONE;
}
else if (con->attr & ATTR_RAW) {
if (CurOfs == bios->FirstKbdCharPtr) {
/* no input */
hdr->status = STAT_DONE|STAT_BUSY;
} else {
/* some keyboard input waiting */
hdr->status = STAT_DONE;
}
} else {
/* no line input */
hdr->status = STAT_DONE|STAT_BUSY;
}
break;
case CMD_INFLUSH:
/* flush line and keyboard queue */
lol->offs_unread_CON = 0;
bios->NextKbdCharPtr = bios->FirstKbdCharPtr;
break;
case CMD_OUTPUT:
case CMD_SAFEOUTPUT:
{
REQ_IO *io = (REQ_IO *)hdr;
BYTE *buffer = CTX_SEG_OFF_TO_LIN(ctx,
SELECTOROF(io->buffer),
(DWORD)OFFSETOF(io->buffer));
DWORD result = 0;
WriteFile(lpDosTask->hConOutput, buffer, io->count, &result, NULL);
io->count = result;
hdr->status = STAT_DONE;
}
break;
default:
hdr->status = STAT_DONE;
}
do_lret(ctx);
}
static void InitListOfLists(DOS_LISTOFLISTS *DOS_LOL)
{
/*
Output of DOS 6.22:
@ -131,14 +433,16 @@ void DOSDEV_InstallDOSDevices(void)
DOS_DEVICE_HEADER *pdev;
UINT16 seg;
int n;
WORD ofs = sizeof(DOS_LISTOFLISTS)-sizeof(DOS_DEVICE_HEADER);
WORD ofs = DEV0_OFS;
DOS_LISTOFLISTS *DOS_LOL;
/* allocate DOS data segment or something */
DOS_LOLSeg = GlobalDOSAlloc16(ofs+sizeof(WINEDEV)+sizeof(devs));
DOS_LOLSeg = GlobalDOSAlloc16(ALL_OFS+CON_BUFFER);
seg = HIWORD(DOS_LOLSeg);
DOS_LOL = PTR_SEG_OFF_TO_LIN(LOWORD(DOS_LOLSeg), 0);
InitListOfLists();
/* initialize the magnificent List Of Lists */
InitListOfLists(DOS_LOL);
/* copy first device (NUL) */
pdev = &(DOS_LOL->NUL_dev);
@ -155,6 +459,10 @@ void DOSDEV_InstallDOSDevices(void)
dev++;
ofs += sizeof(WINEDEV);
/* first of remaining devices is CON */
DOS_LOL->ptr_CON_dev_hdr = PTR_SEG_OFF_TO_SEGPTR(seg, ofs);
/* copy remaining devices */
memcpy(dev,&devs,sizeof(devs));
for (n=0; n<nr_devs; n++) {
pdev->next_dev = PTR_SEG_OFF_TO_SEGPTR(seg, ofs);
@ -166,3 +474,136 @@ void DOSDEV_InstallDOSDevices(void)
pdev = &(dev[n].hdr);
}
}
DWORD DOSDEV_Console(void)
{
return DOSMEM_LOL()->ptr_CON_dev_hdr;
}
DWORD DOSDEV_FindCharDevice(char*name)
{
SEGPTR cur_ptr = PTR_SEG_OFF_TO_SEGPTR(HIWORD(DOS_LOLSeg),
FIELD_OFFSET(DOS_LISTOFLISTS,NUL_dev));
DOS_DEVICE_HEADER *cur = DOSMEM_MapRealToLinear(cur_ptr);
char dname[8];
int cnt;
/* get first 8 characters */
strncpy(dname,name,8);
/* if less than 8 characters, pad with spaces */
for (cnt=0; cnt<8; cnt++)
if (!dname[cnt]) dname[cnt]=' ';
/* search for char devices with the right name */
while (cur &&
((!(cur->attr & ATTR_CHAR)) ||
memcmp(cur->name,dname,8))) {
cur_ptr = cur->next_dev;
if (cur_ptr == NONEXT) cur=NULL;
else cur = DOSMEM_MapRealToLinear(cur_ptr);
}
return cur_ptr;
}
static void DOSDEV_DoReq(void*req, DWORD dev)
{
REQUEST_HEADER *hdr = (REQUEST_HEADER *)req;
DOS_DEVICE_HEADER *dhdr;
CONTEXT ctx;
char *phdr;
dhdr = DOSMEM_MapRealToLinear(dev);
phdr = ((char*)DOSMEM_LOL()) + ALLDEV_OFS;
/* copy request to request scratch area */
memcpy(phdr, req, hdr->size);
/* prepare to call device driver */
memset(&ctx, 0, sizeof(ctx));
/* ES:BX points to request for strategy routine */
ES_reg(&ctx) = HIWORD(DOS_LOLSeg);
BX_reg(&ctx) = ALLDEV_OFS;
/* call strategy routine */
CS_reg(&ctx) = SELECTOROF(dev);
IP_reg(&ctx) = dhdr->strategy;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* call interrupt routine */
CS_reg(&ctx) = SELECTOROF(dev);
IP_reg(&ctx) = dhdr->interrupt;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* completed, copy request back */
memcpy(req, phdr, hdr->size);
if (hdr->status & STAT_ERROR) {
switch (hdr->status & STAT_MASK) {
case 0x0F: /* invalid disk change */
/* this error seems to fit the bill */
SetLastError(ER_NotSameDevice);
break;
default:
SetLastError((hdr->status & STAT_MASK) + 0x13);
break;
}
}
}
static int DOSDEV_IO(unsigned cmd, DWORD dev, DWORD buf, int buflen)
{
REQ_IO req;
req.hdr.size=sizeof(req);
req.hdr.unit=0; /* not dealing with block devices yet */
req.hdr.command=cmd;
req.hdr.status=STAT_BUSY;
req.media=0; /* not dealing with block devices yet */
req.buffer=buf;
req.count=buflen;
req.sector=0; /* block devices */
req.volume=0; /* block devices */
DOSDEV_DoReq(&req, dev);
return req.count;
}
int DOSDEV_Peek(DWORD dev, BYTE*data)
{
REQ_SAFEINPUT req;
req.hdr.size=sizeof(req);
req.hdr.unit=0; /* not dealing with block devices yet */
req.hdr.command=CMD_SAFEINPUT;
req.hdr.status=STAT_BUSY;
req.data=0;
DOSDEV_DoReq(&req, dev);
if (req.hdr.status & STAT_BUSY) return 0;
*data = req.data;
return 1;
}
int DOSDEV_Read(DWORD dev, DWORD buf, int buflen)
{
return DOSDEV_IO(CMD_INPUT, dev, buf, buflen);
}
int DOSDEV_Write(DWORD dev, DWORD buf, int buflen, int verify)
{
return DOSDEV_IO(verify?CMD_SAFEOUTPUT:CMD_OUTPUT, dev, buf, buflen);
}
int DOSDEV_IoctlRead(DWORD dev, DWORD buf, int buflen)
{
return DOSDEV_IO(CMD_INIOCTL, dev, buf, buflen);
}
int DOSDEV_IoctlWrite(DWORD dev, DWORD buf, int buflen)
{
return DOSDEV_IO(CMD_OUTIOCTL, dev, buf, buflen);
}

34
msdos/dosmem.c
View File

@ -156,6 +156,12 @@ BYTE * DOSMEM_BiosSys()
return DOSMEM_MemoryBase(0)+0xf0000;
}
struct _DOS_LISTOFLISTS * DOSMEM_LOL()
{
return (struct _DOS_LISTOFLISTS *)DOSMEM_MapRealToLinear
(PTR_SEG_OFF_TO_SEGPTR(HIWORD(DOS_LOLSeg),0));
}
/***********************************************************************
* DOSMEM_FillBiosSegments
*
@ -376,6 +382,28 @@ static void DOSMEM_InitMemory(HMODULE16 hModule)
;
}
/***********************************************************************
* DOSMEM_MovePointers
*
* Relocates any pointers into DOS memory to a new address space.
*/
static void DOSMEM_MovePointers(LPVOID dest, LPVOID src, DWORD size)
{
unsigned long delta = dest-src;
unsigned cnt;
ldt_entry ent;
/* relocate base addresses of any selectors pointing into memory */
for (cnt=FIRST_LDT_ENTRY_TO_ALLOC; cnt<LDT_SIZE; cnt++) {
LDT_GetEntry(cnt, &ent);
if ((ent.base >= (unsigned long)src) && \
(ent.base < ((unsigned long)src + size))) {
ent.base += delta;
LDT_SetEntry(cnt, &ent);
}
}
}
/***********************************************************************
* DOSMEM_Init
*
@ -415,8 +443,12 @@ BOOL DOSMEM_Init(HMODULE16 hModule)
DOSMEM_FillIsrTable(hModule);
DOSMEM_InitMemory(hModule);
#else
LPVOID base = DOSMEM_MemoryBase(hModule);
/* bootstrap the new V86 task with a copy of the "system" memory */
memcpy(DOSMEM_MemoryBase(hModule), DOSMEM_dosmem, 0x100000);
memcpy(base, DOSMEM_dosmem, 0x100000);
/* then move existing selectors to it */
DOSMEM_MovePointers(base, DOSMEM_dosmem, 0x100000);
#endif
}
return TRUE;

4
msdos/int21.c
View File

@ -1662,9 +1662,9 @@ void WINAPI DOS3Call( CONTEXT *context )
SET_CFLAG(context);
break;
}
DOS_LOL->sharing_retry_delay = CX_reg(context);
DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
if (!DX_reg(context))
DOS_LOL->sharing_retry_count = DX_reg(context);
DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
RESET_CFLAG(context);
break;