SheepShaver/src/thunks.cpp

/*
 *  thunks.cpp - Thunks to share data and code with MacOS
 *
 *  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 "thunks.h"
#include "emul_op.h"
#include "cpu_emulation.h"

// Native function declarations
#include "main.h"
#include "video.h"
#include "name_registry.h"
#include "serial.h"
#include "ether.h"


/*              NativeOp instruction format:
                +------------+--------------------------+--+----------+------------+
                |      6     |                          |FN|    OP    |      2     |
                +------------+--------------------------+--+----------+------------+
                 0         5 |6                       19 20 21      25 26        31
*/

#define POWERPC_NATIVE_OP(LR, OP) \
                (POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2)

// Return the fake PowerPC opcode to handle specified native code
#if EMULATED_PPC
uint32 NativeOpcode(int selector)
{
        uint32 opcode;
        switch (selector) {
        case NATIVE_DISABLE_INTERRUPT:
        case NATIVE_ENABLE_INTERRUPT:
                opcode = POWERPC_NATIVE_OP(0, selector);
                break;
        case NATIVE_PATCH_NAME_REGISTRY:
        case NATIVE_VIDEO_INSTALL_ACCEL:
        case NATIVE_VIDEO_VBL:
        case NATIVE_VIDEO_DO_DRIVER_IO:
        case NATIVE_ETHER_IRQ:
        case NATIVE_ETHER_INIT:
        case NATIVE_ETHER_TERM:
        case NATIVE_ETHER_OPEN:
        case NATIVE_ETHER_CLOSE:
        case NATIVE_ETHER_WPUT:
        case NATIVE_ETHER_RSRV:
        case NATIVE_SERIAL_NOTHING:
        case NATIVE_SERIAL_OPEN:
        case NATIVE_SERIAL_PRIME_IN:
        case NATIVE_SERIAL_PRIME_OUT:
        case NATIVE_SERIAL_CONTROL:
        case NATIVE_SERIAL_STATUS:
        case NATIVE_SERIAL_CLOSE:
        case NATIVE_GET_RESOURCE:
        case NATIVE_GET_1_RESOURCE:
        case NATIVE_GET_IND_RESOURCE:
        case NATIVE_GET_1_IND_RESOURCE:
        case NATIVE_R_GET_RESOURCE:
        case NATIVE_MAKE_EXECUTABLE:
                opcode = POWERPC_NATIVE_OP(1, selector);
                break;
        default:
                abort();
        }
        return opcode;
}
#endif

// NativeOp -> { TVECT, function base } mappings
struct native_op_t {
        uint32 tvect;
        uint32 func;
};
static native_op_t native_op[NATIVE_OP_MAX];

// Initialize the thunks system
bool ThunksInit(void)
{
#if EMULATED_PPC
        for (int i = 0; i < NATIVE_OP_MAX; i++) {
                uintptr base = SheepMem::Reserve(12);
                WriteMacInt32(base + 0, base + 8);
                WriteMacInt32(base + 4, 0); // Fake TVECT
                WriteMacInt32(base + 8, NativeOpcode(i));
                native_op[i].tvect = base;
                native_op[i].func  = base + 8;
        }
#else
#if defined(__linux__)
#define DEFINE_NATIVE_OP(ID, FUNC) do {                         \
                uintptr base = SheepMem::Reserve(8);            \
                WriteMacInt32(base + 0, (uint32)FUNC);          \
                WriteMacInt32(base + 4, 0); /*Fake TVECT*/      \
                native_op[ID].tvect = base;                                     \
                native_op[ID].func  = (uint32)FUNC;                     \
        } while (0)
#elif defined(__BEOS__)
#define DEFINE_NATIVE_OP(ID, FUNC) do {                         \
                native_op[ID].tvect = FUNC;                                     \
                native_op[ID].func  = ((uint32 *)FUNC)[0];      \
        } while (0)
#else
#error "FIXME: define NativeOp for your platform"
#endif
        DEFINE_NATIVE_OP(NATIVE_SERIAL_NOTHING, SerialNothing);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_OPEN, SerialOpen);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_IN, SerialPrimeIn);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_OUT, SerialPrimeOut);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_CONTROL, SerialControl);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus);
        DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose);
        DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable);
#undef DEFINE_NATIVE_OP
#endif
        return true;
}

// Return the native function descriptor (TVECT)
uint32 NativeTVECT(int selector)
{
        assert(selector < NATIVE_OP_MAX);
        const uint32 tvect = native_op[selector].tvect;
        assert(tvect != 0);
        return native_op[selector].tvect;
}

// Return the native function address
uint32 NativeFunction(int selector)
{
        assert(selector < NATIVE_OP_MAX);
        const uint32 func = native_op[selector].func;
        assert(func != 0);
        return native_op[selector].func;
}
Revision:	1.1
Committed:	2003-12-04T17:26:35Z (20 years, 11 months ago) by gbeauche
Branch:	MAIN
Log Message:	Add new thunking system for 64-bit fixes.
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* thunks.cpp - Thunks to share data and code with MacOS
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 "thunks.h"
23			#include "emul_op.h"
24			#include "cpu_emulation.h"
25
26			// Native function declarations
27			#include "main.h"
28			#include "video.h"
29			#include "name_registry.h"
30			#include "serial.h"
31			#include "ether.h"
32
33
34			/* NativeOp instruction format:
35			+------------+--------------------------+--+----------+------------+
36			\| 6 \| \|FN\| OP \| 2 \|
37			+------------+--------------------------+--+----------+------------+
38			0 5 \|6 19 20 21 25 26 31
39			*/
40
41			#define POWERPC_NATIVE_OP(LR, OP) \
42			(POWERPC_EMUL_OP \| ((LR) << 11) \| (((uint32)OP) << 6) \| 2)
43
44			// Return the fake PowerPC opcode to handle specified native code
45			#if EMULATED_PPC
46			uint32 NativeOpcode(int selector)
47			{
48			uint32 opcode;
49			switch (selector) {
50			case NATIVE_DISABLE_INTERRUPT:
51			case NATIVE_ENABLE_INTERRUPT:
52			opcode = POWERPC_NATIVE_OP(0, selector);
53			break;
54			case NATIVE_PATCH_NAME_REGISTRY:
55			case NATIVE_VIDEO_INSTALL_ACCEL:
56			case NATIVE_VIDEO_VBL:
57			case NATIVE_VIDEO_DO_DRIVER_IO:
58			case NATIVE_ETHER_IRQ:
59			case NATIVE_ETHER_INIT:
60			case NATIVE_ETHER_TERM:
61			case NATIVE_ETHER_OPEN:
62			case NATIVE_ETHER_CLOSE:
63			case NATIVE_ETHER_WPUT:
64			case NATIVE_ETHER_RSRV:
65			case NATIVE_SERIAL_NOTHING:
66			case NATIVE_SERIAL_OPEN:
67			case NATIVE_SERIAL_PRIME_IN:
68			case NATIVE_SERIAL_PRIME_OUT:
69			case NATIVE_SERIAL_CONTROL:
70			case NATIVE_SERIAL_STATUS:
71			case NATIVE_SERIAL_CLOSE:
72			case NATIVE_GET_RESOURCE:
73			case NATIVE_GET_1_RESOURCE:
74			case NATIVE_GET_IND_RESOURCE:
75			case NATIVE_GET_1_IND_RESOURCE:
76			case NATIVE_R_GET_RESOURCE:
77			case NATIVE_MAKE_EXECUTABLE:
78			opcode = POWERPC_NATIVE_OP(1, selector);
79			break;
80			default:
81			abort();
82			}
83			return opcode;
84			}
85			#endif
86
87			// NativeOp -> { TVECT, function base } mappings
88			struct native_op_t {
89			uint32 tvect;
90			uint32 func;
91			};
92			static native_op_t native_op[NATIVE_OP_MAX];
93
94			// Initialize the thunks system
95			bool ThunksInit(void)
96			{
97			#if EMULATED_PPC
98			for (int i = 0; i < NATIVE_OP_MAX; i++) {
99			uintptr base = SheepMem::Reserve(12);
100			WriteMacInt32(base + 0, base + 8);
101			WriteMacInt32(base + 4, 0); // Fake TVECT
102			WriteMacInt32(base + 8, NativeOpcode(i));
103			native_op[i].tvect = base;
104			native_op[i].func = base + 8;
105			}
106			#else
107			#if defined(__linux__)
108			#define DEFINE_NATIVE_OP(ID, FUNC) do { \
109			uintptr base = SheepMem::Reserve(8); \
110			WriteMacInt32(base + 0, (uint32)FUNC); \
111			WriteMacInt32(base + 4, 0); /Fake TVECT/ \
112			native_op[ID].tvect = base; \
113			native_op[ID].func = (uint32)FUNC; \
114			} while (0)
115			#elif defined(__BEOS__)
116			#define DEFINE_NATIVE_OP(ID, FUNC) do { \
117			native_op[ID].tvect = FUNC; \
118			native_op[ID].func = ((uint32 *)FUNC)[0]; \
119			} while (0)
120			#else
121			#error "FIXME: define NativeOp for your platform"
122			#endif
123			DEFINE_NATIVE_OP(NATIVE_SERIAL_NOTHING, SerialNothing);
124			DEFINE_NATIVE_OP(NATIVE_SERIAL_OPEN, SerialOpen);
125			DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_IN, SerialPrimeIn);
126			DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_OUT, SerialPrimeOut);
127			DEFINE_NATIVE_OP(NATIVE_SERIAL_CONTROL, SerialControl);
128			DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus);
129			DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose);
130			DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable);
131			#undef DEFINE_NATIVE_OP
132			#endif
133			return true;
134			}
135
136			// Return the native function descriptor (TVECT)
137			uint32 NativeTVECT(int selector)
138			{
139			assert(selector < NATIVE_OP_MAX);
140			const uint32 tvect = native_op[selector].tvect;
141			assert(tvect != 0);
142			return native_op[selector].tvect;
143			}
144
145			// Return the native function address
146			uint32 NativeFunction(int selector)
147			{
148			assert(selector < NATIVE_OP_MAX);
149			const uint32 func = native_op[selector].func;
150			assert(func != 0);
151			return native_op[selector].func;
152			}