SheepShaver/src/macos_util.cpp

/*
 *  macos_util.cpp - MacOS definitions/utility functions
 *
 *  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "sony.h"
#include "disk.h"
#include "cdrom.h"
#include "xlowmem.h"
#include "emul_op.h"
#include "macos_util.h"
#include "thunks.h"

#define DEBUG 0
#include "debug.h"


// Function pointers
typedef long (*cu_ptr)(void *, uint32);
static uint32 cu_tvect = 0;
static inline long CallUniversal(void *arg1, uint32 arg2)
{
        return (long)CallMacOS2(cu_ptr, cu_tvect, arg1, arg2);
}
typedef int16 (*gsl_ptr)(char *, uint32, uint32, uint32 *, void **, char *);
static uint32 gsl_tvect = 0;
static inline int16 GetSharedLibrary(char *arg1, uint32 arg2, uint32 arg3, uint32 *arg4, void **arg5, char *arg6)
{
        return (int16)CallMacOS6(gsl_ptr, gsl_tvect, arg1, arg2, arg3, arg4, arg5, arg6);
}
typedef int16 (*fs_ptr)(uint32, char *, void **, uint32 *);
static uint32 fs_tvect = 0;
static inline int16 FindSymbol(uint32 arg1, char *arg2, void **arg3, uint32 *arg4)
{
        return (int16)CallMacOS4(fs_ptr, fs_tvect, arg1, arg2, arg3, arg4);
}
typedef int16 (*cc_ptr)(uint32 *);
static uint32 cc_tvect = 0;
static inline int16 CloseConnection(uint32 *arg1)
{
        return (int16)CallMacOS1(cc_ptr, cc_tvect, arg1);
}


/*
 *  Reset MacOS utilities
 */

void MacOSUtilReset(void)
{
        cu_tvect = 0;
        gsl_tvect = 0;
        fs_tvect = 0;
        cc_tvect = 0;
}


/*
 *  Enqueue QElem to list
 */

void Enqueue(uint32 elem, uint32 list)
{
        WriteMacInt32(elem + qLink, 0);
        if (!ReadMacInt32(list + qTail)) {
                WriteMacInt32(list + qHead, elem);
                WriteMacInt32(list + qTail, elem);
        } else {
                WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem);
                WriteMacInt32(list + qTail, elem);
        }
}


/*
 *  Find first free drive number, starting at num
 */

static bool is_drive_number_free(int num)
{
        uint32 e = ReadMacInt32(0x308 + qHead);
        while (e) {
                uint32 d = e - dsQLink;
                if ((int)ReadMacInt16(d + dsQDrive) == num)
                        return false;
                e = ReadMacInt32(e + qLink);
        }
        return true;
}

int FindFreeDriveNumber(int num)
{
        while (!is_drive_number_free(num))
                num++;
        return num;
}


/*
 *  Mount volume with given file handle (call this function when you are unable to
 *  do automatic media change detection and the user has to press a special key
 *  or something to mount a volume; this function will check if there's really a
 *  volume in the drive with SysIsDiskInserted(); volumes which are present on startup
 *  are automatically mounted)
 */

void MountVolume(void *fh)
{
        SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh);
}


/*
 *  Calculate disk image file layout given file size and first 256 data bytes
 */

void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size)
{
        if (size == 419284 || size == 838484) {
                // 400K/800K DiskCopy image, 84 byte header
                start_byte = 84;
                real_size = (size - 84) & ~0x1ff;
        } else {
                // 0..511 byte header
                start_byte = size & 0x1ff;
                real_size = size - start_byte;
        }
}


/*
 *  Find symbol in shared library (using CFM)
 *  lib and sym must be Pascal strings!
 */

void *FindLibSymbol(char *lib_str, char *sym_str)
{
        SheepVar32 conn_id = 0;
        SheepVar32 main_addr = 0;
        SheepArray<256> err;
        WriteMacInt8(err.addr(), 0);
        SheepVar32 sym_addr = 0;
        SheepVar32 sym_class = 0;

        SheepString lib(lib_str);
        SheepString sym(sym_str);

        D(bug("FindLibSymbol %s in %s...\n", sym.value()+1, lib.value()+1));

        if (ReadMacInt32(XLM_RUN_MODE) == MODE_EMUL_OP) {
                M68kRegisters r;
        
                // Find shared library
                static const uint16 proc1[] = {
                        PW(0x558f),                                                     // subq.l       #2,a7
                        PW(0x2f08),                                                     // move.l       a0,-(a7)
                        PW(0x2f3c), PW(0x7077), PW(0x7063),     // move.l       #'pwpc',-(a7)
                        PW(0x2f3c), PW(0x0000), PW(0x0001),     // move.l       #kReferenceCFrag,-(a7)
                        PW(0x2f09),                                                     // move.l       a1,-(a7)
                        PW(0x2f0a),                                                     // move.l       a2,-(a7)
                        PW(0x2f0b),                                                     // move.l       a3,-(a7)
                        PW(0x3f3c), PW(0x0001),                         // (GetSharedLibrary)
                        PW(0xaa5a),                                                     // CFMDispatch
                        PW(0x301f),                                                     // move.w       (a7)+,d0
                        PW(M68K_RTS)
                };
                r.a[0] = lib.addr();
                r.a[1] = conn_id.addr();
                r.a[2] = main_addr.addr();
                r.a[3] = err.addr();
                Execute68k((uint32)proc1, &r);
                D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", (int16)r.d[0], conn_id.value(), main_addr.value()));
                if (r.d[0])
                        return NULL;
        
                // Find symbol
                static const uint16 proc2[] = {
                        PW(0x558f),                                     // subq.l       #2,a7
                        PW(0x2f00),                                     // move.l       d0,-(a7)
                        PW(0x2f08),                                     // move.l       a0,-(a7)
                        PW(0x2f09),                                     // move.l       a1,-(a7)
                        PW(0x2f0a),                                     // move.l       a2,-(a7)
                        PW(0x3f3c), PW(0x0005),         // (FindSymbol)
                        PW(0xaa5a),                                     // CFMDispatch
                        PW(0x301f),                                     // move.w       (a7)+,d0
                        PW(M68K_RTS)
                };
                r.d[0] = conn_id.value();
                r.a[0] = sym.addr();
                r.a[1] = sym_addr.addr();
                r.a[2] = sym_class.addr();
                Execute68k((uint32)proc2, &r);
                D(bug(" FindSymbol1: ret %d, sym_addr %p, sym_class %ld\n", (int16)r.d[0], sym_addr.value(), sym_class.value()));
//!! CloseConnection()?
                if (r.d[0])
                        return NULL;
                else
                        return (void *)sym_addr.value();

        } else {

                if (GetSharedLibrary == NULL || FindSymbol == NULL) {
                        printf("FATAL: FindLibSymbol() called too early\n");
                        return 0;
                }
                int16 res;
                res = GetSharedLibrary(lib.value(), FOURCC('p','w','p','c'), 1, (uint32 *)conn_id.addr(), (void **)main_addr.addr(), (char *)err.addr());
                D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", res, conn_id.value(), main_addr.value()));
                if (res)
                        return NULL;
                res = FindSymbol(conn_id.value(), sym.value(), (void **)sym_addr.addr(), (uint32 *)sym_class.addr());
                D(bug(" FindSymbol: ret %d, sym_addr %p, sym_class %ld\n", res, sym_addr.value(), sym_class.value()));
//!!??          CloseConnection(&conn_id);
                if (res)
                        return NULL;
                else
                        return (void *)sym_addr.value();
        }
}


/*
 *  Find CallUniversalProc() TVector
 */

void InitCallUniversalProc()
{
        cu_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\021CallUniversalProc");
        D(bug("CallUniversalProc TVECT at %08lx\n", cu_tvect));
        if (cu_tvect == 0) {
                printf("FATAL: Can't find CallUniversalProc()\n");
                QuitEmulator();
        }

        gsl_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\020GetSharedLibrary");
        D(bug("GetSharedLibrary TVECT at %08lx\n", gsl_tvect));
        if (gsl_tvect == 0) {
                printf("FATAL: Can't find GetSharedLibrary()\n");
                QuitEmulator();
        }

        fs_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\012FindSymbol");
        D(bug("FindSymbol TVECT at %08lx\n", fs_tvect));
        if (fs_tvect == 0) {
                printf("FATAL: Can't find FindSymbol()\n");
                QuitEmulator();
        }

        cc_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\017CloseConnection");
        D(bug("CloseConnection TVECT at %08lx\n", cc_tvect));
        if (cc_tvect == 0) {
                printf("FATAL: Can't find CloseConnection()\n");
                QuitEmulator();
        }
}


/*
 *  CallUniversalProc
 */

long CallUniversalProc(void *upp, uint32 info)
{
        if (cu_tvect == 0) {
                printf("FATAL: CallUniversalProc() called too early\n");
                return 0;
        }
        return CallUniversal(upp, info);
}


/*
 *  Convert time_t value to MacOS time (seconds since 1.1.1904)
 */

uint32 TimeToMacTime(time_t t)
{
        // This code is taken from glibc 2.2

        // Convert to number of seconds elapsed since 1-Jan-1904
        struct tm *local = localtime(&t);
        const int TM_EPOCH_YEAR = 1900;
        const int MAC_EPOCH_YEAR = 1904;
        int a4 = ((local->tm_year + TM_EPOCH_YEAR) >> 2) - !(local->tm_year & 3);
        int b4 = (MAC_EPOCH_YEAR >> 2) - !(MAC_EPOCH_YEAR & 3);
        int a100 = a4 / 25 - (a4 % 25 < 0);
        int b100 = b4 / 25 - (b4 % 25 < 0);
        int a400 = a100 >> 2;
        int b400 = b100 >> 2;
        int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
        uint32 days = local->tm_yday + 365 * (local->tm_year - 4) + intervening_leap_days;
        return local->tm_sec + 60 * (local->tm_min + 60 * (local->tm_hour + 24 * days));
}
Revision:	1.6
Committed:	2004-01-12T15:37:18Z (20 years, 10 months ago) by cebix
Branch:	MAIN
Changes since 1.5:	+1 -1 lines
Log Message:	Happy New Year! :)
#	User	Rev	Content
1	cebix	1.1	/*
2			* macos_util.cpp - MacOS definitions/utility functions
3			*
4	cebix	1.6	* SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
5	cebix	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sysdeps.h"
22			#include "cpu_emulation.h"
23			#include "main.h"
24			#include "sony.h"
25			#include "disk.h"
26			#include "cdrom.h"
27			#include "xlowmem.h"
28			#include "emul_op.h"
29			#include "macos_util.h"
30	gbeauche	1.4	#include "thunks.h"
31	cebix	1.1
32			#define DEBUG 0
33			#include "debug.h"
34
35
36			// Function pointers
37			typedef long (cu_ptr)(void , uint32);
38			static uint32 cu_tvect = 0;
39			static inline long CallUniversal(void *arg1, uint32 arg2)
40			{
41			return (long)CallMacOS2(cu_ptr, cu_tvect, arg1, arg2);
42			}
43			typedef int16 (gsl_ptr)(char , uint32, uint32, uint32 , void , char );
44			static uint32 gsl_tvect = 0;
45			static inline int16 GetSharedLibrary(char arg1, uint32 arg2, uint32 arg3, uint32 arg4, void *arg5, char arg6)
46			{
47			return (int16)CallMacOS6(gsl_ptr, gsl_tvect, arg1, arg2, arg3, arg4, arg5, arg6);
48			}
49			typedef int16 (fs_ptr)(uint32, char , void *, uint32 );
50			static uint32 fs_tvect = 0;
51			static inline int16 FindSymbol(uint32 arg1, char arg2, void arg3, uint32 arg4)
52			{
53			return (int16)CallMacOS4(fs_ptr, fs_tvect, arg1, arg2, arg3, arg4);
54			}
55			typedef int16 (cc_ptr)(uint32 );
56			static uint32 cc_tvect = 0;
57			static inline int16 CloseConnection(uint32 *arg1)
58			{
59			return (int16)CallMacOS1(cc_ptr, cc_tvect, arg1);
60			}
61
62
63			/*
64			* Reset MacOS utilities
65			*/
66
67			void MacOSUtilReset(void)
68			{
69			cu_tvect = 0;
70			gsl_tvect = 0;
71			fs_tvect = 0;
72			cc_tvect = 0;
73			}
74
75
76			/*
77			* Enqueue QElem to list
78			*/
79
80			void Enqueue(uint32 elem, uint32 list)
81			{
82			WriteMacInt32(elem + qLink, 0);
83			if (!ReadMacInt32(list + qTail)) {
84			WriteMacInt32(list + qHead, elem);
85			WriteMacInt32(list + qTail, elem);
86			} else {
87			WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem);
88			WriteMacInt32(list + qTail, elem);
89			}
90			}
91
92
93			/*
94			* Find first free drive number, starting at num
95			*/
96
97			static bool is_drive_number_free(int num)
98			{
99			uint32 e = ReadMacInt32(0x308 + qHead);
100			while (e) {
101			uint32 d = e - dsQLink;
102			if ((int)ReadMacInt16(d + dsQDrive) == num)
103			return false;
104			e = ReadMacInt32(e + qLink);
105			}
106			return true;
107			}
108
109			int FindFreeDriveNumber(int num)
110			{
111			while (!is_drive_number_free(num))
112			num++;
113			return num;
114			}
115
116
117			/*
118			* Mount volume with given file handle (call this function when you are unable to
119			* do automatic media change detection and the user has to press a special key
120			* or something to mount a volume; this function will check if there's really a
121			* volume in the drive with SysIsDiskInserted(); volumes which are present on startup
122			* are automatically mounted)
123			*/
124
125			void MountVolume(void *fh)
126			{
127			SonyMountVolume(fh) \|\| DiskMountVolume(fh) \|\| CDROMMountVolume(fh);
128			}
129
130
131			/*
132			* Calculate disk image file layout given file size and first 256 data bytes
133			*/
134
135			void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size)
136			{
137			if (size == 419284 \|\| size == 838484) {
138			// 400K/800K DiskCopy image, 84 byte header
139			start_byte = 84;
140			real_size = (size - 84) & ~0x1ff;
141			} else {
142			// 0..511 byte header
143			start_byte = size & 0x1ff;
144			real_size = size - start_byte;
145			}
146			}
147
148
149			/*
150			* Find symbol in shared library (using CFM)
151			* lib and sym must be Pascal strings!
152			*/
153
154	gbeauche	1.4	void FindLibSymbol(char lib_str, char *sym_str)
155	cebix	1.1	{
156	gbeauche	1.4	SheepVar32 conn_id = 0;
157			SheepVar32 main_addr = 0;
158			SheepArray<256> err;
159			WriteMacInt8(err.addr(), 0);
160			SheepVar32 sym_addr = 0;
161			SheepVar32 sym_class = 0;
162	cebix	1.1
163	gbeauche	1.4	SheepString lib(lib_str);
164			SheepString sym(sym_str);
165
166			D(bug("FindLibSymbol %s in %s...\n", sym.value()+1, lib.value()+1));
167	cebix	1.1
168	gbeauche	1.2	if (ReadMacInt32(XLM_RUN_MODE) == MODE_EMUL_OP) {
169	cebix	1.1	M68kRegisters r;
170
171			// Find shared library
172	gbeauche	1.5	static const uint16 proc1[] = {
173			PW(0x558f), // subq.l #2,a7
174			PW(0x2f08), // move.l a0,-(a7)
175			PW(0x2f3c), PW(0x7077), PW(0x7063), // move.l #'pwpc',-(a7)
176			PW(0x2f3c), PW(0x0000), PW(0x0001), // move.l #kReferenceCFrag,-(a7)
177			PW(0x2f09), // move.l a1,-(a7)
178			PW(0x2f0a), // move.l a2,-(a7)
179			PW(0x2f0b), // move.l a3,-(a7)
180			PW(0x3f3c), PW(0x0001), // (GetSharedLibrary)
181			PW(0xaa5a), // CFMDispatch
182			PW(0x301f), // move.w (a7)+,d0
183			PW(M68K_RTS)
184	cebix	1.1	};
185	gbeauche	1.4	r.a[0] = lib.addr();
186			r.a[1] = conn_id.addr();
187			r.a[2] = main_addr.addr();
188			r.a[3] = err.addr();
189	cebix	1.1	Execute68k((uint32)proc1, &r);
190	gbeauche	1.4	D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", (int16)r.d[0], conn_id.value(), main_addr.value()));
191	cebix	1.1	if (r.d[0])
192			return NULL;
193
194			// Find symbol
195	gbeauche	1.5	static const uint16 proc2[] = {
196			PW(0x558f), // subq.l #2,a7
197			PW(0x2f00), // move.l d0,-(a7)
198			PW(0x2f08), // move.l a0,-(a7)
199			PW(0x2f09), // move.l a1,-(a7)
200			PW(0x2f0a), // move.l a2,-(a7)
201			PW(0x3f3c), PW(0x0005), // (FindSymbol)
202			PW(0xaa5a), // CFMDispatch
203			PW(0x301f), // move.w (a7)+,d0
204			PW(M68K_RTS)
205	cebix	1.1	};
206	gbeauche	1.4	r.d[0] = conn_id.value();
207			r.a[0] = sym.addr();
208			r.a[1] = sym_addr.addr();
209			r.a[2] = sym_class.addr();
210	cebix	1.1	Execute68k((uint32)proc2, &r);
211	gbeauche	1.4	D(bug(" FindSymbol1: ret %d, sym_addr %p, sym_class %ld\n", (int16)r.d[0], sym_addr.value(), sym_class.value()));
212	cebix	1.1	//!! CloseConnection()?
213			if (r.d[0])
214			return NULL;
215			else
216	gbeauche	1.4	return (void *)sym_addr.value();
217	cebix	1.1
218			} else {
219
220			if (GetSharedLibrary == NULL \|\| FindSymbol == NULL) {
221			printf("FATAL: FindLibSymbol() called too early\n");
222			return 0;
223			}
224			int16 res;
225	gbeauche	1.4	res = GetSharedLibrary(lib.value(), FOURCC('p','w','p','c'), 1, (uint32 )conn_id.addr(), (void )main_addr.addr(), (char )err.addr());
226			D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", res, conn_id.value(), main_addr.value()));
227	cebix	1.1	if (res)
228			return NULL;
229	gbeauche	1.4	res = FindSymbol(conn_id.value(), sym.value(), (void *)sym_addr.addr(), (uint32 )sym_class.addr());
230			D(bug(" FindSymbol: ret %d, sym_addr %p, sym_class %ld\n", res, sym_addr.value(), sym_class.value()));
231	cebix	1.1	//!!?? CloseConnection(&conn_id);
232			if (res)
233			return NULL;
234			else
235	gbeauche	1.4	return (void *)sym_addr.value();
236	cebix	1.1	}
237			}
238
239
240			/*
241			* Find CallUniversalProc() TVector
242			*/
243
244			void InitCallUniversalProc()
245			{
246			cu_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\021CallUniversalProc");
247			D(bug("CallUniversalProc TVECT at %08lx\n", cu_tvect));
248			if (cu_tvect == 0) {
249			printf("FATAL: Can't find CallUniversalProc()\n");
250			QuitEmulator();
251			}
252
253			gsl_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\020GetSharedLibrary");
254			D(bug("GetSharedLibrary TVECT at %08lx\n", gsl_tvect));
255			if (gsl_tvect == 0) {
256			printf("FATAL: Can't find GetSharedLibrary()\n");
257			QuitEmulator();
258			}
259
260			fs_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\012FindSymbol");
261			D(bug("FindSymbol TVECT at %08lx\n", fs_tvect));
262			if (fs_tvect == 0) {
263			printf("FATAL: Can't find FindSymbol()\n");
264			QuitEmulator();
265			}
266
267			cc_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\017CloseConnection");
268			D(bug("CloseConnection TVECT at %08lx\n", cc_tvect));
269			if (cc_tvect == 0) {
270			printf("FATAL: Can't find CloseConnection()\n");
271			QuitEmulator();
272			}
273			}
274
275
276			/*
277			* CallUniversalProc
278			*/
279
280			long CallUniversalProc(void *upp, uint32 info)
281			{
282			if (cu_tvect == 0) {
283			printf("FATAL: CallUniversalProc() called too early\n");
284			return 0;
285			}
286			return CallUniversal(upp, info);
287			}
288
289
290			/*
291			* Convert time_t value to MacOS time (seconds since 1.1.1904)
292			*/
293
294			uint32 TimeToMacTime(time_t t)
295			{
296			// This code is taken from glibc 2.2
297
298			// Convert to number of seconds elapsed since 1-Jan-1904
299			struct tm *local = localtime(&t);
300			const int TM_EPOCH_YEAR = 1900;
301			const int MAC_EPOCH_YEAR = 1904;
302			int a4 = ((local->tm_year + TM_EPOCH_YEAR) >> 2) - !(local->tm_year & 3);
303			int b4 = (MAC_EPOCH_YEAR >> 2) - !(MAC_EPOCH_YEAR & 3);
304			int a100 = a4 / 25 - (a4 % 25 < 0);
305			int b100 = b4 / 25 - (b4 % 25 < 0);
306			int a400 = a100 >> 2;
307			int b400 = b100 >> 2;
308			int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
309			uint32 days = local->tm_yday + 365 * (local->tm_year - 4) + intervening_leap_days;
310			return local->tm_sec + 60 * (local->tm_min + 60 * (local->tm_hour + 24 * days));
311			}