SheepShaver/src/macos_util.cpp

/*
 *  macos_util.cpp - MacOS definitions/utility functions
 *
 *  SheepShaver (C) 1997-2002 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"

#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, char *sym)
{
        uint32 conn_id = 0;
        void *main_addr = NULL;
        char err[256] = "";
        uint32 *sym_addr = NULL;
        uint32 sym_class = 0;

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

        if (ReadMacInt32(XLM_RUN_MODE) == MODE_EMUL_OP) {
                M68kRegisters r;
        
                // Find shared library
                static const uint8 proc1[] = {
                        0x55, 0x8f,                                                     // subq.l       #2,a7
                        0x2f, 0x08,                                                     // move.l       a0,-(a7)
                        0x2f, 0x3c, 0x70, 0x77, 0x70, 0x63,     // move.l       #'pwpc',-(a7)
                        0x2f, 0x3c, 0x00, 0x00, 0x00, 0x01,     // move.l       #kReferenceCFrag,-(a7)
                        0x2f, 0x09,                                                     // move.l       a1,-(a7)
                        0x2f, 0x0a,                                                     // move.l       a2,-(a7)
                        0x2f, 0x0b,                                                     // move.l       a3,-(a7)
                        0x3f, 0x3c, 0x00, 0x01,                         // (GetSharedLibrary)
                        0xaa, 0x5a,                                                     // CFMDispatch
                        0x30, 0x1f,                                                     // move.w       (a7)+,d0
                        M68K_RTS >> 8, M68K_RTS & 0xff
                };
                r.a[0] = (uint32)lib;
                r.a[1] = (uint32)&conn_id;
                r.a[2] = (uint32)&main_addr;
                r.a[3] = (uint32)err;
                Execute68k((uint32)proc1, &r);
                D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", (int16)r.d[0], conn_id, main_addr));
                if (r.d[0])
                        return NULL;
        
                // Find symbol
                static const uint8 proc2[] = {
                        0x55, 0x8f,                                     // subq.l       #2,a7
                        0x2f, 0x00,                                     // move.l       d0,-(a7)
                        0x2f, 0x08,                                     // move.l       a0,-(a7)
                        0x2f, 0x09,                                     // move.l       a1,-(a7)
                        0x2f, 0x0a,                                     // move.l       a2,-(a7)
                        0x3f, 0x3c, 0x00, 0x05,         // (FindSymbol)
                        0xaa, 0x5a,                                     // CFMDispatch
                        0x30, 0x1f,                                     // move.w       (a7)+,d0
                        M68K_RTS >> 8, M68K_RTS & 0xff
                };
                r.d[0] = conn_id;
                r.a[0] = (uint32)sym;
                r.a[1] = (uint32)&sym_addr;
                r.a[2] = (uint32)&sym_class;
                Execute68k((uint32)proc2, &r);
                D(bug(" FindSymbol: ret %d, sym_addr %p, sym_class %ld\n", (int16)r.d[0], sym_addr, sym_class));
//!! CloseConnection()?
                if (r.d[0])
                        return NULL;
                else
                        return sym_addr;

        } else {

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


/*
 *  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:	1.2
Committed:	2003-09-29T20:30:19Z (21 years, 2 months ago) by gbeauche
Branch:	MAIN
Changes since 1.1:	+23 -23 lines
Log Message:	first round of little endian fixes
#	User	Rev	Content
1	cebix	1.1	/*
2			* macos_util.cpp - MacOS definitions/utility functions
3			*
4			* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
5			*
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
31			#define DEBUG 0
32			#include "debug.h"
33
34
35			// Function pointers
36			typedef long (cu_ptr)(void , uint32);
37			static uint32 cu_tvect = 0;
38			static inline long CallUniversal(void *arg1, uint32 arg2)
39			{
40			return (long)CallMacOS2(cu_ptr, cu_tvect, arg1, arg2);
41			}
42			typedef int16 (gsl_ptr)(char , uint32, uint32, uint32 , void , char );
43			static uint32 gsl_tvect = 0;
44			static inline int16 GetSharedLibrary(char arg1, uint32 arg2, uint32 arg3, uint32 arg4, void *arg5, char arg6)
45			{
46			return (int16)CallMacOS6(gsl_ptr, gsl_tvect, arg1, arg2, arg3, arg4, arg5, arg6);
47			}
48			typedef int16 (fs_ptr)(uint32, char , void *, uint32 );
49			static uint32 fs_tvect = 0;
50			static inline int16 FindSymbol(uint32 arg1, char arg2, void arg3, uint32 arg4)
51			{
52			return (int16)CallMacOS4(fs_ptr, fs_tvect, arg1, arg2, arg3, arg4);
53			}
54			typedef int16 (cc_ptr)(uint32 );
55			static uint32 cc_tvect = 0;
56			static inline int16 CloseConnection(uint32 *arg1)
57			{
58			return (int16)CallMacOS1(cc_ptr, cc_tvect, arg1);
59			}
60
61
62			/*
63			* Reset MacOS utilities
64			*/
65
66			void MacOSUtilReset(void)
67			{
68			cu_tvect = 0;
69			gsl_tvect = 0;
70			fs_tvect = 0;
71			cc_tvect = 0;
72			}
73
74
75			/*
76			* Enqueue QElem to list
77			*/
78
79			void Enqueue(uint32 elem, uint32 list)
80			{
81			WriteMacInt32(elem + qLink, 0);
82			if (!ReadMacInt32(list + qTail)) {
83			WriteMacInt32(list + qHead, elem);
84			WriteMacInt32(list + qTail, elem);
85			} else {
86			WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem);
87			WriteMacInt32(list + qTail, elem);
88			}
89			}
90
91
92			/*
93			* Find first free drive number, starting at num
94			*/
95
96			static bool is_drive_number_free(int num)
97			{
98			uint32 e = ReadMacInt32(0x308 + qHead);
99			while (e) {
100			uint32 d = e - dsQLink;
101			if ((int)ReadMacInt16(d + dsQDrive) == num)
102			return false;
103			e = ReadMacInt32(e + qLink);
104			}
105			return true;
106			}
107
108			int FindFreeDriveNumber(int num)
109			{
110			while (!is_drive_number_free(num))
111			num++;
112			return num;
113			}
114
115
116			/*
117			* Mount volume with given file handle (call this function when you are unable to
118			* do automatic media change detection and the user has to press a special key
119			* or something to mount a volume; this function will check if there's really a
120			* volume in the drive with SysIsDiskInserted(); volumes which are present on startup
121			* are automatically mounted)
122			*/
123
124			void MountVolume(void *fh)
125			{
126			SonyMountVolume(fh) \|\| DiskMountVolume(fh) \|\| CDROMMountVolume(fh);
127			}
128
129
130			/*
131			* Calculate disk image file layout given file size and first 256 data bytes
132			*/
133
134			void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size)
135			{
136			if (size == 419284 \|\| size == 838484) {
137			// 400K/800K DiskCopy image, 84 byte header
138			start_byte = 84;
139			real_size = (size - 84) & ~0x1ff;
140			} else {
141			// 0..511 byte header
142			start_byte = size & 0x1ff;
143			real_size = size - start_byte;
144			}
145			}
146
147
148			/*
149			* Find symbol in shared library (using CFM)
150			* lib and sym must be Pascal strings!
151			*/
152
153			void FindLibSymbol(char lib, char *sym)
154			{
155			uint32 conn_id = 0;
156			void *main_addr = NULL;
157			char err[256] = "";
158			uint32 *sym_addr = NULL;
159			uint32 sym_class = 0;
160
161			D(bug("FindLibSymbol %s in %s...\n", sym+1, lib+1));
162
163	gbeauche	1.2	if (ReadMacInt32(XLM_RUN_MODE) == MODE_EMUL_OP) {
164	cebix	1.1	M68kRegisters r;
165
166			// Find shared library
167	gbeauche	1.2	static const uint8 proc1[] = {
168			0x55, 0x8f, // subq.l #2,a7
169			0x2f, 0x08, // move.l a0,-(a7)
170			0x2f, 0x3c, 0x70, 0x77, 0x70, 0x63, // move.l #'pwpc',-(a7)
171			0x2f, 0x3c, 0x00, 0x00, 0x00, 0x01, // move.l #kReferenceCFrag,-(a7)
172			0x2f, 0x09, // move.l a1,-(a7)
173			0x2f, 0x0a, // move.l a2,-(a7)
174			0x2f, 0x0b, // move.l a3,-(a7)
175			0x3f, 0x3c, 0x00, 0x01, // (GetSharedLibrary)
176			0xaa, 0x5a, // CFMDispatch
177			0x30, 0x1f, // move.w (a7)+,d0
178			M68K_RTS >> 8, M68K_RTS & 0xff
179	cebix	1.1	};
180			r.a[0] = (uint32)lib;
181			r.a[1] = (uint32)&conn_id;
182			r.a[2] = (uint32)&main_addr;
183			r.a[3] = (uint32)err;
184			Execute68k((uint32)proc1, &r);
185			D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", (int16)r.d[0], conn_id, main_addr));
186			if (r.d[0])
187			return NULL;
188
189			// Find symbol
190	gbeauche	1.2	static const uint8 proc2[] = {
191			0x55, 0x8f, // subq.l #2,a7
192			0x2f, 0x00, // move.l d0,-(a7)
193			0x2f, 0x08, // move.l a0,-(a7)
194			0x2f, 0x09, // move.l a1,-(a7)
195			0x2f, 0x0a, // move.l a2,-(a7)
196			0x3f, 0x3c, 0x00, 0x05, // (FindSymbol)
197			0xaa, 0x5a, // CFMDispatch
198			0x30, 0x1f, // move.w (a7)+,d0
199			M68K_RTS >> 8, M68K_RTS & 0xff
200	cebix	1.1	};
201			r.d[0] = conn_id;
202			r.a[0] = (uint32)sym;
203			r.a[1] = (uint32)&sym_addr;
204			r.a[2] = (uint32)&sym_class;
205			Execute68k((uint32)proc2, &r);
206			D(bug(" FindSymbol: ret %d, sym_addr %p, sym_class %ld\n", (int16)r.d[0], sym_addr, sym_class));
207			//!! CloseConnection()?
208			if (r.d[0])
209			return NULL;
210			else
211			return sym_addr;
212
213			} else {
214
215			if (GetSharedLibrary == NULL \|\| FindSymbol == NULL) {
216			printf("FATAL: FindLibSymbol() called too early\n");
217			return 0;
218			}
219			int16 res;
220			res = GetSharedLibrary(lib, FOURCC('p','w','p','c'), 1, &conn_id, &main_addr, err);
221			D(bug(" GetSharedLibrary: ret %d, connection ID %ld, main %p\n", res, conn_id, main_addr));
222			if (res)
223			return NULL;
224			res = FindSymbol(conn_id, sym, (void **)&sym_addr, &sym_class);
225			D(bug(" FindSymbol: ret %d, sym_addr %p, sym_class %ld\n", res, sym_addr, sym_class));
226			//!!?? CloseConnection(&conn_id);
227			if (res)
228			return NULL;
229			else
230			return sym_addr;
231			}
232			}
233
234
235			/*
236			* Find CallUniversalProc() TVector
237			*/
238
239			void InitCallUniversalProc()
240			{
241			cu_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\021CallUniversalProc");
242			D(bug("CallUniversalProc TVECT at %08lx\n", cu_tvect));
243			if (cu_tvect == 0) {
244			printf("FATAL: Can't find CallUniversalProc()\n");
245			QuitEmulator();
246			}
247
248			gsl_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\020GetSharedLibrary");
249			D(bug("GetSharedLibrary TVECT at %08lx\n", gsl_tvect));
250			if (gsl_tvect == 0) {
251			printf("FATAL: Can't find GetSharedLibrary()\n");
252			QuitEmulator();
253			}
254
255			fs_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\012FindSymbol");
256			D(bug("FindSymbol TVECT at %08lx\n", fs_tvect));
257			if (fs_tvect == 0) {
258			printf("FATAL: Can't find FindSymbol()\n");
259			QuitEmulator();
260			}
261
262			cc_tvect = (uint32)FindLibSymbol("\014InterfaceLib", "\017CloseConnection");
263			D(bug("CloseConnection TVECT at %08lx\n", cc_tvect));
264			if (cc_tvect == 0) {
265			printf("FATAL: Can't find CloseConnection()\n");
266			QuitEmulator();
267			}
268			}
269
270
271			/*
272			* CallUniversalProc
273			*/
274
275			long CallUniversalProc(void *upp, uint32 info)
276			{
277			if (cu_tvect == 0) {
278			printf("FATAL: CallUniversalProc() called too early\n");
279			return 0;
280			}
281			return CallUniversal(upp, info);
282			}
283
284
285			/*
286			* Convert time_t value to MacOS time (seconds since 1.1.1904)
287			*/
288
289			uint32 TimeToMacTime(time_t t)
290			{
291			// This code is taken from glibc 2.2
292
293			// Convert to number of seconds elapsed since 1-Jan-1904
294			struct tm *local = localtime(&t);
295			const int TM_EPOCH_YEAR = 1900;
296			const int MAC_EPOCH_YEAR = 1904;
297			int a4 = ((local->tm_year + TM_EPOCH_YEAR) >> 2) - !(local->tm_year & 3);
298			int b4 = (MAC_EPOCH_YEAR >> 2) - !(MAC_EPOCH_YEAR & 3);
299			int a100 = a4 / 25 - (a4 % 25 < 0);
300			int b100 = b4 / 25 - (b4 % 25 < 0);
301			int a400 = a100 >> 2;
302			int b400 = b100 >> 2;
303			int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
304			uint32 days = local->tm_yday + 365 * (local->tm_year - 4) + intervening_leap_days;
305			return local->tm_sec + 60 * (local->tm_min + 60 * (local->tm_hour + 24 * days));
306			}