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"
#include "xlowmem.h"

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

// Generate PowerPC thunks for GetResource() replacements?
#define POWERPC_GET_RESOURCE_THUNKS 1


/*              NativeOp instruction format:
                +------------+-------------------------+--+-----------+------------+
                |      6     |                         |FN|    OP     |      2     |
                +------------+-------------------------+--+-----------+------------+
                 0         5 |6                      18 19 20      25 26        31
*/

#define POWERPC_NATIVE_OP(FN, OP) \
                (POWERPC_EMUL_OP | ((FN) << 12) | (((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_CHECK_LOAD_INVOC:
        case NATIVE_NAMED_CHECK_LOAD_INVOC:
        case NATIVE_NQD_SYNC_HOOK:
        case NATIVE_NQD_BITBLT_HOOK:
        case NATIVE_NQD_FILLRECT_HOOK:
        case NATIVE_NQD_UNKNOWN_HOOK:
        case NATIVE_NQD_BITBLT:
        case NATIVE_NQD_INVRECT:
        case NATIVE_NQD_FILLRECT:
                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_AO_GET_HWADDR:
        case NATIVE_ETHER_AO_ADD_MULTI:
        case NATIVE_ETHER_AO_DEL_MULTI:
        case NATIVE_ETHER_AO_SEND_PACKET:
        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_GET_NAMED_RESOURCE:
        case NATIVE_GET_1_NAMED_RESOURCE:
        case NATIVE_MAKE_EXECUTABLE:
                opcode = POWERPC_NATIVE_OP(1, selector);
                break;
        default:
                abort();
        }
        return opcode;
}
#endif


/*
 *  Generate PowerPC thunks for GetResource() replacements
 */

#if EMULATED_PPC
static uint32 get_resource_func;
static uint32 get_1_resource_func;
static uint32 get_ind_resource_func;
static uint32 get_1_ind_resource_func;
static uint32 r_get_resource_func;
static uint32 get_named_resource_func;
static uint32 get_1_named_resource_func;

static void generate_powerpc_thunks(void)
{
        // check_load_invoc() thunk
        uint32 check_load_invoc_opcode = NativeOpcode(NATIVE_CHECK_LOAD_INVOC);
        uint32 base;

        static uint32 get_resource_template[] = {
                PL(0x7c0802a6),         // mflr    r0
                PL(0x90010008),         // stw     r0,8(r1)
                PL(0x9421ffbc),         // stwu    r1,-68(r1)
                PL(0x90610038),         // stw     r3,56(r1)
                PL(0x9081003c),         // stw     r4,60(r1)
                PL(0x00000000),         // lwz     r0,XLM_GET_RESOURCE(r0)
                PL(0x80402834),         // lwz     r2,XLM_RES_LIB_TOC(r0)
                PL(0x7c0903a6),         // mtctr   r0
                PL(0x4e800421),         // bctrl
                PL(0x90610040),         // stw     r3,64(r1)
                PL(0x80610038),         // lwz     r3,56(r1)
                PL(0xa881003e),         // lha     r4,62(r1)
                PL(0x80a10040),         // lwz     r5,64(r1)
                PL(0x00000001),         // <check_load_invoc>
                PL(0x80610040),         // lwz     r3,64(r1)
                PL(0x8001004c),         // lwz     r0,76(r1)
                PL(0x7c0803a6),         // mtlr    r0
                PL(0x38210044),         // addi    r1,r1,68
                PL(0x4e800020)          // blr
        };
        const uint32 get_resource_template_size = sizeof(get_resource_template);

        int xlm_index = -1, check_load_invoc_index = -1;
        for (int i = 0; i < get_resource_template_size/4; i++) {
                uint32 opcode = ntohl(get_resource_template[i]);
                switch (opcode) {
                case 0x00000000:
                        xlm_index = i;
                        break;
                case 0x00000001:
                        check_load_invoc_index = i;
                        break;
                }
        }
        assert(xlm_index != -1 && check_load_invoc_index != -1);

        // GetResource()
        get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // Get1Resource()
        get_1_resource_func = base = SheepMem::Reserve(get_resource_template_size);
        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // GetIndResource()
        get_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_IND_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // Get1IndResource()
        get_1_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_IND_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // RGetResource()
        r_get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_R_GET_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // named_check_load_invoc() thunk
        check_load_invoc_opcode = NativeOpcode(NATIVE_NAMED_CHECK_LOAD_INVOC);

        static uint32 get_named_resource_template[] = {
                PL(0x7c0802a6),         // mflr    r0
                PL(0x90010008),         // stw     r0,8(r1)
                PL(0x9421ffbc),         // stwu    r1,-68(r1)
                PL(0x90610038),         // stw     r3,56(r1)
                PL(0x9081003c),         // stw     r4,60(r1)
                PL(0x00000000),         // lwz     r0,XLM_GET_NAMED_RESOURCE(r0)
                PL(0x80402834),         // lwz     r2,XLM_RES_LIB_TOC(r0)
                PL(0x7c0903a6),         // mtctr   r0
                PL(0x4e800421),         // bctrl
                PL(0x90610040),         // stw     r3,64(r1)
                PL(0x80610038),         // lwz     r3,56(r1)
                PL(0x8081003c),         // lwz     r4,60(r1)
                PL(0x80a10040),         // lwz     r5,64(r1)
                PL(0x00000001),         // <named_check_load_invoc>
                PL(0x80610040),         // lwz     r3,64(r1)
                PL(0x8001004c),         // lwz     r0,76(r1)
                PL(0x7c0803a6),         // mtlr    r0
                PL(0x38210044),         // addi    r1,r1,68
                PL(0x4e800020)          // blr
        };
        const uint32 get_named_resource_template_size = sizeof(get_named_resource_template);

        xlm_index = -1, check_load_invoc_index = -1;
        for (int i = 0; i < get_resource_template_size/4; i++) {
                uint32 opcode = ntohl(get_resource_template[i]);
                switch (opcode) {
                case 0x00000000:
                        xlm_index = i;
                        break;
                case 0x00000001:
                        check_load_invoc_index = i;
                        break;
                }
        }
        assert(xlm_index != -1 && check_load_invoc_index != -1);

        // GetNamedResource()
        get_named_resource_func = base = SheepMem::Reserve(get_named_resource_template_size);
        Host2Mac_memcpy(base, get_named_resource_template, get_named_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_NAMED_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);

        // Get1NamedResource()
        get_1_named_resource_func = base = SheepMem::Reserve(get_named_resource_template_size);
        Host2Mac_memcpy(base, get_named_resource_template, get_named_resource_template_size);
        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_NAMED_RESOURCE);
        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
}
#endif


/*
 *  Initialize the thunks system
 */

struct native_op_t {
        uint32 tvect;
        uint32 func;
        SheepRoutineDescriptor *desc;
};
static native_op_t native_op[NATIVE_OP_MAX];

bool ThunksInit(void)
{
#if EMULATED_PPC
        for (int i = 0; i < NATIVE_OP_MAX; i++) {
                uintptr base = SheepMem::Reserve(16);
                WriteMacInt32(base + 0, base + 8);
                WriteMacInt32(base + 4, 0); // Fake TVECT
                WriteMacInt32(base + 8, NativeOpcode(i));
                WriteMacInt32(base + 12, POWERPC_BLR);
                native_op[i].tvect = base;
                native_op[i].func  = base + 8;
        }
#if POWERPC_GET_RESOURCE_THUNKS
        generate_powerpc_thunks();
        native_op[NATIVE_GET_RESOURCE].func = get_resource_func;
        native_op[NATIVE_GET_1_RESOURCE].func = get_1_resource_func;
        native_op[NATIVE_GET_IND_RESOURCE].func = get_ind_resource_func;
        native_op[NATIVE_GET_1_IND_RESOURCE].func = get_1_ind_resource_func;
        native_op[NATIVE_R_GET_RESOURCE].func = r_get_resource_func;
        native_op[NATIVE_GET_NAMED_RESOURCE].func = get_named_resource_func;
        native_op[NATIVE_GET_1_NAMED_RESOURCE].func = get_1_named_resource_func;
#endif
#else
#if defined(__linux__) || defined(__NetBSD__) || (defined(__APPLE__) && defined(__MACH__))
#define DEFINE_NATIVE_OP(ID, FUNC) do {                         \
                uintptr base = SheepMem::Reserve(8);            \
                WriteMacInt32(base + 0, (uint32)FUNC);          \
                WriteMacInt32(base + 4, (uint32)TOC);           \
                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
        // FIXME: add GetResource() and friends for completeness
        DEFINE_NATIVE_OP(NATIVE_PATCH_NAME_REGISTRY, DoPatchNameRegistry);
        DEFINE_NATIVE_OP(NATIVE_VIDEO_INSTALL_ACCEL, VideoInstallAccel);
        DEFINE_NATIVE_OP(NATIVE_VIDEO_VBL, VideoVBL);
        DEFINE_NATIVE_OP(NATIVE_VIDEO_DO_DRIVER_IO, VideoDoDriverIO);
        DEFINE_NATIVE_OP(NATIVE_ETHER_AO_GET_HWADDR, AO_get_ethernet_address);
        DEFINE_NATIVE_OP(NATIVE_ETHER_AO_ADD_MULTI, AO_enable_multicast);
        DEFINE_NATIVE_OP(NATIVE_ETHER_AO_DEL_MULTI, AO_disable_multicast);
        DEFINE_NATIVE_OP(NATIVE_ETHER_AO_SEND_PACKET, AO_transmit_packet);
        DEFINE_NATIVE_OP(NATIVE_ETHER_IRQ, EtherIRQ);
        DEFINE_NATIVE_OP(NATIVE_ETHER_INIT, InitStreamModule);
        DEFINE_NATIVE_OP(NATIVE_ETHER_TERM, TerminateStreamModule);
        DEFINE_NATIVE_OP(NATIVE_ETHER_OPEN, ether_open);
        DEFINE_NATIVE_OP(NATIVE_ETHER_CLOSE, ether_close);
        DEFINE_NATIVE_OP(NATIVE_ETHER_WPUT, ether_wput);
        DEFINE_NATIVE_OP(NATIVE_ETHER_RSRV, ether_rsrv);
        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);
        DEFINE_NATIVE_OP(NATIVE_NQD_SYNC_HOOK, NQD_sync_hook);
        DEFINE_NATIVE_OP(NATIVE_NQD_BITBLT_HOOK, NQD_bitblt_hook);
        DEFINE_NATIVE_OP(NATIVE_NQD_FILLRECT_HOOK, NQD_fillrect_hook);
        DEFINE_NATIVE_OP(NATIVE_NQD_UNKNOWN_HOOK, NQD_unknown_hook);
        DEFINE_NATIVE_OP(NATIVE_NQD_BITBLT, NQD_bitblt);
        DEFINE_NATIVE_OP(NATIVE_NQD_INVRECT, NQD_invrect);
        DEFINE_NATIVE_OP(NATIVE_NQD_FILLRECT, NQD_fillrect);
#undef DEFINE_NATIVE_OP
#endif

        // Initialize routine descriptors (if TVECT exists)
        for (int i = 0; i < NATIVE_OP_MAX; i++) {
                uint32 tvect = native_op[i].tvect;
                if (tvect)
                        native_op[i].desc = new SheepRoutineDescriptor(0, tvect);
        }

        return true;
}


/*
 *  Delete generated thunks
 */

void ThunksExit(void)
{
        for (int i = 0; i < NATIVE_OP_MAX; i++) {
                SheepRoutineDescriptor *desc = native_op[i].desc;
                if (desc)
                        delete desc;
        }
}


/*
 *  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 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 func;
}


/*
 *  Return the routine descriptor address of the native function
 */

uint32 NativeRoutineDescriptor(int selector)
{
        assert(selector < NATIVE_OP_MAX);
        SheepRoutineDescriptor * const desc = native_op[selector].desc;
        assert(desc != 0);
        return desc->addr();
}


/*
 *  Execute native code from EMUL_OP routine (real mode switch)
 */

void ExecuteNative(int selector)
{
        M68kRegisters r;
        Execute68k(NativeRoutineDescriptor(selector), &r);
}
Revision:	1.18
Committed:	2006-05-14T07:21:10Z (18 years ago) by gbeauche
Branch:	MAIN
Changes since 1.17:	+9 -8 lines
Log Message:	Optimize generated code to NQD & CheckLoad functions. They don't call into 68k or MacOS code, so they don't need to be a termination point. i.e. don't split into two basic blocks and thus avoid a full hash search. Also add missing NQD_unknown_hook NativeOp from previous commit.
#	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	gbeauche	1.6	#include "xlowmem.h"
26	gbeauche	1.1
27			// Native function declarations
28			#include "main.h"
29			#include "video.h"
30			#include "name_registry.h"
31			#include "serial.h"
32			#include "ether.h"
33	gbeauche	1.2	#include "macos_util.h"
34	gbeauche	1.1
35	gbeauche	1.6	// Generate PowerPC thunks for GetResource() replacements?
36			#define POWERPC_GET_RESOURCE_THUNKS 1
37
38	gbeauche	1.1
39			/* NativeOp instruction format:
40	gbeauche	1.9	+------------+-------------------------+--+-----------+------------+
41			\| 6 \| \|FN\| OP \| 2 \|
42			+------------+-------------------------+--+-----------+------------+
43			0 5 \|6 18 19 20 25 26 31
44	gbeauche	1.1	*/
45
46	gbeauche	1.9	#define POWERPC_NATIVE_OP(FN, OP) \
47			(POWERPC_EMUL_OP \| ((FN) << 12) \| (((uint32)OP) << 6) \| 2)
48	gbeauche	1.1
49	gbeauche	1.2	/*
50			* Return the fake PowerPC opcode to handle specified native code
51			*/
52
53	gbeauche	1.1	#if EMULATED_PPC
54			uint32 NativeOpcode(int selector)
55			{
56			uint32 opcode;
57			switch (selector) {
58	gbeauche	1.6	case NATIVE_CHECK_LOAD_INVOC:
59	gbeauche	1.16	case NATIVE_NAMED_CHECK_LOAD_INVOC:
60	gbeauche	1.18	case NATIVE_NQD_SYNC_HOOK:
61			case NATIVE_NQD_BITBLT_HOOK:
62			case NATIVE_NQD_FILLRECT_HOOK:
63			case NATIVE_NQD_UNKNOWN_HOOK:
64			case NATIVE_NQD_BITBLT:
65			case NATIVE_NQD_INVRECT:
66			case NATIVE_NQD_FILLRECT:
67	gbeauche	1.1	opcode = POWERPC_NATIVE_OP(0, selector);
68			break;
69			case NATIVE_PATCH_NAME_REGISTRY:
70			case NATIVE_VIDEO_INSTALL_ACCEL:
71			case NATIVE_VIDEO_VBL:
72			case NATIVE_VIDEO_DO_DRIVER_IO:
73	gbeauche	1.14	case NATIVE_ETHER_AO_GET_HWADDR:
74			case NATIVE_ETHER_AO_ADD_MULTI:
75			case NATIVE_ETHER_AO_DEL_MULTI:
76			case NATIVE_ETHER_AO_SEND_PACKET:
77	gbeauche	1.1	case NATIVE_ETHER_IRQ:
78			case NATIVE_ETHER_INIT:
79			case NATIVE_ETHER_TERM:
80			case NATIVE_ETHER_OPEN:
81			case NATIVE_ETHER_CLOSE:
82			case NATIVE_ETHER_WPUT:
83			case NATIVE_ETHER_RSRV:
84			case NATIVE_SERIAL_NOTHING:
85			case NATIVE_SERIAL_OPEN:
86			case NATIVE_SERIAL_PRIME_IN:
87			case NATIVE_SERIAL_PRIME_OUT:
88			case NATIVE_SERIAL_CONTROL:
89			case NATIVE_SERIAL_STATUS:
90			case NATIVE_SERIAL_CLOSE:
91			case NATIVE_GET_RESOURCE:
92			case NATIVE_GET_1_RESOURCE:
93			case NATIVE_GET_IND_RESOURCE:
94			case NATIVE_GET_1_IND_RESOURCE:
95			case NATIVE_R_GET_RESOURCE:
96	gbeauche	1.16	case NATIVE_GET_NAMED_RESOURCE:
97			case NATIVE_GET_1_NAMED_RESOURCE:
98	gbeauche	1.1	case NATIVE_MAKE_EXECUTABLE:
99			opcode = POWERPC_NATIVE_OP(1, selector);
100			break;
101			default:
102			abort();
103			}
104			return opcode;
105			}
106			#endif
107
108	gbeauche	1.2
109			/*
110	gbeauche	1.6	* Generate PowerPC thunks for GetResource() replacements
111			*/
112
113			#if EMULATED_PPC
114			static uint32 get_resource_func;
115			static uint32 get_1_resource_func;
116			static uint32 get_ind_resource_func;
117			static uint32 get_1_ind_resource_func;
118			static uint32 r_get_resource_func;
119	gbeauche	1.16	static uint32 get_named_resource_func;
120			static uint32 get_1_named_resource_func;
121	gbeauche	1.6
122			static void generate_powerpc_thunks(void)
123			{
124	gbeauche	1.16	// check_load_invoc() thunk
125			uint32 check_load_invoc_opcode = NativeOpcode(NATIVE_CHECK_LOAD_INVOC);
126			uint32 base;
127
128	gbeauche	1.6	static uint32 get_resource_template[] = {
129			PL(0x7c0802a6), // mflr r0
130			PL(0x90010008), // stw r0,8(r1)
131			PL(0x9421ffbc), // stwu r1,-68(r1)
132			PL(0x90610038), // stw r3,56(r1)
133			PL(0x9081003c), // stw r4,60(r1)
134			PL(0x00000000), // lwz r0,XLM_GET_RESOURCE(r0)
135			PL(0x80402834), // lwz r2,XLM_RES_LIB_TOC(r0)
136			PL(0x7c0903a6), // mtctr r0
137			PL(0x4e800421), // bctrl
138			PL(0x90610040), // stw r3,64(r1)
139			PL(0x80610038), // lwz r3,56(r1)
140			PL(0xa881003e), // lha r4,62(r1)
141			PL(0x80a10040), // lwz r5,64(r1)
142			PL(0x00000001), // <check_load_invoc>
143			PL(0x80610040), // lwz r3,64(r1)
144			PL(0x8001004c), // lwz r0,76(r1)
145			PL(0x7c0803a6), // mtlr r0
146			PL(0x38210044), // addi r1,r1,68
147			PL(0x4e800020) // blr
148			};
149			const uint32 get_resource_template_size = sizeof(get_resource_template);
150
151			int xlm_index = -1, check_load_invoc_index = -1;
152			for (int i = 0; i < get_resource_template_size/4; i++) {
153			uint32 opcode = ntohl(get_resource_template[i]);
154			switch (opcode) {
155			case 0x00000000:
156			xlm_index = i;
157			break;
158			case 0x00000001:
159			check_load_invoc_index = i;
160			break;
161			}
162			}
163			assert(xlm_index != -1 && check_load_invoc_index != -1);
164
165			// GetResource()
166			get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
167			Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
168			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_RESOURCE);
169			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
170
171			// Get1Resource()
172			get_1_resource_func = base = SheepMem::Reserve(get_resource_template_size);
173			Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
174			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_1_RESOURCE);
175			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
176
177			// GetIndResource()
178			get_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
179			Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
180			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_IND_RESOURCE);
181			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
182
183			// Get1IndResource()
184			get_1_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
185			Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
186			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_1_IND_RESOURCE);
187			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
188
189			// RGetResource()
190			r_get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
191			Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
192			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_R_GET_RESOURCE);
193			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
194	gbeauche	1.16
195			// named_check_load_invoc() thunk
196			check_load_invoc_opcode = NativeOpcode(NATIVE_NAMED_CHECK_LOAD_INVOC);
197
198			static uint32 get_named_resource_template[] = {
199			PL(0x7c0802a6), // mflr r0
200			PL(0x90010008), // stw r0,8(r1)
201			PL(0x9421ffbc), // stwu r1,-68(r1)
202			PL(0x90610038), // stw r3,56(r1)
203			PL(0x9081003c), // stw r4,60(r1)
204			PL(0x00000000), // lwz r0,XLM_GET_NAMED_RESOURCE(r0)
205			PL(0x80402834), // lwz r2,XLM_RES_LIB_TOC(r0)
206			PL(0x7c0903a6), // mtctr r0
207			PL(0x4e800421), // bctrl
208			PL(0x90610040), // stw r3,64(r1)
209			PL(0x80610038), // lwz r3,56(r1)
210			PL(0x8081003c), // lwz r4,60(r1)
211			PL(0x80a10040), // lwz r5,64(r1)
212			PL(0x00000001), // <named_check_load_invoc>
213			PL(0x80610040), // lwz r3,64(r1)
214			PL(0x8001004c), // lwz r0,76(r1)
215			PL(0x7c0803a6), // mtlr r0
216			PL(0x38210044), // addi r1,r1,68
217			PL(0x4e800020) // blr
218			};
219			const uint32 get_named_resource_template_size = sizeof(get_named_resource_template);
220
221			xlm_index = -1, check_load_invoc_index = -1;
222			for (int i = 0; i < get_resource_template_size/4; i++) {
223			uint32 opcode = ntohl(get_resource_template[i]);
224			switch (opcode) {
225			case 0x00000000:
226			xlm_index = i;
227			break;
228			case 0x00000001:
229			check_load_invoc_index = i;
230			break;
231			}
232			}
233			assert(xlm_index != -1 && check_load_invoc_index != -1);
234
235			// GetNamedResource()
236			get_named_resource_func = base = SheepMem::Reserve(get_named_resource_template_size);
237			Host2Mac_memcpy(base, get_named_resource_template, get_named_resource_template_size);
238			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_NAMED_RESOURCE);
239			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
240
241			// Get1NamedResource()
242			get_1_named_resource_func = base = SheepMem::Reserve(get_named_resource_template_size);
243			Host2Mac_memcpy(base, get_named_resource_template, get_named_resource_template_size);
244			WriteMacInt32(base + xlm_index * 4, 0x80000000 \| XLM_GET_1_NAMED_RESOURCE);
245			WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
246	gbeauche	1.6	}
247			#endif
248
249
250			/*
251	gbeauche	1.2	* Initialize the thunks system
252			*/
253
254	gbeauche	1.1	struct native_op_t {
255			uint32 tvect;
256			uint32 func;
257	gbeauche	1.3	SheepRoutineDescriptor *desc;
258	gbeauche	1.1	};
259			static native_op_t native_op[NATIVE_OP_MAX];
260
261			bool ThunksInit(void)
262			{
263			#if EMULATED_PPC
264			for (int i = 0; i < NATIVE_OP_MAX; i++) {
265	gbeauche	1.18	uintptr base = SheepMem::Reserve(16);
266	gbeauche	1.1	WriteMacInt32(base + 0, base + 8);
267			WriteMacInt32(base + 4, 0); // Fake TVECT
268			WriteMacInt32(base + 8, NativeOpcode(i));
269	gbeauche	1.18	WriteMacInt32(base + 12, POWERPC_BLR);
270	gbeauche	1.1	native_op[i].tvect = base;
271			native_op[i].func = base + 8;
272			}
273	gbeauche	1.6	#if POWERPC_GET_RESOURCE_THUNKS
274			generate_powerpc_thunks();
275			native_op[NATIVE_GET_RESOURCE].func = get_resource_func;
276			native_op[NATIVE_GET_1_RESOURCE].func = get_1_resource_func;
277			native_op[NATIVE_GET_IND_RESOURCE].func = get_ind_resource_func;
278			native_op[NATIVE_GET_1_IND_RESOURCE].func = get_1_ind_resource_func;
279			native_op[NATIVE_R_GET_RESOURCE].func = r_get_resource_func;
280	gbeauche	1.16	native_op[NATIVE_GET_NAMED_RESOURCE].func = get_named_resource_func;
281			native_op[NATIVE_GET_1_NAMED_RESOURCE].func = get_1_named_resource_func;
282	gbeauche	1.6	#endif
283	gbeauche	1.1	#else
284	gbeauche	1.12	#if defined(__linux__) \|\| defined(__NetBSD__) \|\| (defined(__APPLE__) && defined(__MACH__))
285	gbeauche	1.1	#define DEFINE_NATIVE_OP(ID, FUNC) do { \
286			uintptr base = SheepMem::Reserve(8); \
287			WriteMacInt32(base + 0, (uint32)FUNC); \
288	gbeauche	1.13	WriteMacInt32(base + 4, (uint32)TOC); \
289	gbeauche	1.1	native_op[ID].tvect = base; \
290			native_op[ID].func = (uint32)FUNC; \
291			} while (0)
292			#elif defined(__BEOS__)
293			#define DEFINE_NATIVE_OP(ID, FUNC) do { \
294			native_op[ID].tvect = FUNC; \
295			native_op[ID].func = ((uint32 *)FUNC)[0]; \
296			} while (0)
297			#else
298			#error "FIXME: define NativeOp for your platform"
299			#endif
300	gbeauche	1.4	// FIXME: add GetResource() and friends for completeness
301	gbeauche	1.2	DEFINE_NATIVE_OP(NATIVE_PATCH_NAME_REGISTRY, DoPatchNameRegistry);
302			DEFINE_NATIVE_OP(NATIVE_VIDEO_INSTALL_ACCEL, VideoInstallAccel);
303			DEFINE_NATIVE_OP(NATIVE_VIDEO_VBL, VideoVBL);
304			DEFINE_NATIVE_OP(NATIVE_VIDEO_DO_DRIVER_IO, VideoDoDriverIO);
305	gbeauche	1.14	DEFINE_NATIVE_OP(NATIVE_ETHER_AO_GET_HWADDR, AO_get_ethernet_address);
306			DEFINE_NATIVE_OP(NATIVE_ETHER_AO_ADD_MULTI, AO_enable_multicast);
307			DEFINE_NATIVE_OP(NATIVE_ETHER_AO_DEL_MULTI, AO_disable_multicast);
308	gbeauche	1.15	DEFINE_NATIVE_OP(NATIVE_ETHER_AO_SEND_PACKET, AO_transmit_packet);
309	gbeauche	1.2	DEFINE_NATIVE_OP(NATIVE_ETHER_IRQ, EtherIRQ);
310			DEFINE_NATIVE_OP(NATIVE_ETHER_INIT, InitStreamModule);
311			DEFINE_NATIVE_OP(NATIVE_ETHER_TERM, TerminateStreamModule);
312			DEFINE_NATIVE_OP(NATIVE_ETHER_OPEN, ether_open);
313			DEFINE_NATIVE_OP(NATIVE_ETHER_CLOSE, ether_close);
314			DEFINE_NATIVE_OP(NATIVE_ETHER_WPUT, ether_wput);
315			DEFINE_NATIVE_OP(NATIVE_ETHER_RSRV, ether_rsrv);
316	gbeauche	1.1	DEFINE_NATIVE_OP(NATIVE_SERIAL_NOTHING, SerialNothing);
317			DEFINE_NATIVE_OP(NATIVE_SERIAL_OPEN, SerialOpen);
318			DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_IN, SerialPrimeIn);
319			DEFINE_NATIVE_OP(NATIVE_SERIAL_PRIME_OUT, SerialPrimeOut);
320			DEFINE_NATIVE_OP(NATIVE_SERIAL_CONTROL, SerialControl);
321			DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus);
322			DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose);
323			DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable);
324	gbeauche	1.17	DEFINE_NATIVE_OP(NATIVE_NQD_SYNC_HOOK, NQD_sync_hook);
325			DEFINE_NATIVE_OP(NATIVE_NQD_BITBLT_HOOK, NQD_bitblt_hook);
326			DEFINE_NATIVE_OP(NATIVE_NQD_FILLRECT_HOOK, NQD_fillrect_hook);
327			DEFINE_NATIVE_OP(NATIVE_NQD_UNKNOWN_HOOK, NQD_unknown_hook);
328			DEFINE_NATIVE_OP(NATIVE_NQD_BITBLT, NQD_bitblt);
329			DEFINE_NATIVE_OP(NATIVE_NQD_INVRECT, NQD_invrect);
330			DEFINE_NATIVE_OP(NATIVE_NQD_FILLRECT, NQD_fillrect);
331	gbeauche	1.1	#undef DEFINE_NATIVE_OP
332			#endif
333	gbeauche	1.3
334	gbeauche	1.4	// Initialize routine descriptors (if TVECT exists)
335			for (int i = 0; i < NATIVE_OP_MAX; i++) {
336			uint32 tvect = native_op[i].tvect;
337			if (tvect)
338			native_op[i].desc = new SheepRoutineDescriptor(0, tvect);
339			}
340	gbeauche	1.3
341	gbeauche	1.1	return true;
342			}
343
344	gbeauche	1.2
345			/*
346	gbeauche	1.3	* Delete generated thunks
347			*/
348
349			void ThunksExit(void)
350			{
351			for (int i = 0; i < NATIVE_OP_MAX; i++) {
352			SheepRoutineDescriptor *desc = native_op[i].desc;
353			if (desc)
354			delete desc;
355			}
356			}
357
358
359			/*
360	gbeauche	1.2	* Return the native function descriptor (TVECT)
361			*/
362
363	gbeauche	1.1	uint32 NativeTVECT(int selector)
364			{
365			assert(selector < NATIVE_OP_MAX);
366			const uint32 tvect = native_op[selector].tvect;
367			assert(tvect != 0);
368	gbeauche	1.2	return tvect;
369	gbeauche	1.1	}
370
371	gbeauche	1.2
372			/*
373			* Return the native function address
374			*/
375
376	gbeauche	1.1	uint32 NativeFunction(int selector)
377			{
378			assert(selector < NATIVE_OP_MAX);
379			const uint32 func = native_op[selector].func;
380			assert(func != 0);
381	gbeauche	1.2	return func;
382			}
383
384
385			/*
386	gbeauche	1.3	* Return the routine descriptor address of the native function
387			*/
388
389			uint32 NativeRoutineDescriptor(int selector)
390			{
391			assert(selector < NATIVE_OP_MAX);
392			SheepRoutineDescriptor * const desc = native_op[selector].desc;
393			assert(desc != 0);
394			return desc->addr();
395			}
396
397
398			/*
399	gbeauche	1.2	* Execute native code from EMUL_OP routine (real mode switch)
400			*/
401
402			void ExecuteNative(int selector)
403			{
404			M68kRegisters r;
405	gbeauche	1.3	Execute68k(NativeRoutineDescriptor(selector), &r);
406	gbeauche	1.1	}