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root/cebix/SheepShaver/src/thunks.cpp
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Comparing SheepShaver/src/thunks.cpp (file contents):
Revision 1.5 by gbeauche, 2004-01-18T22:10:09Z vs.
Revision 1.12 by gbeauche, 2005-02-20T18:08:50Z

# Line 22 | Line 22
22   #include "thunks.h"
23   #include "emul_op.h"
24   #include "cpu_emulation.h"
25 + #include "xlowmem.h"
26  
27   // Native function declarations
28   #include "main.h"
# Line 31 | Line 32
32   #include "ether.h"
33   #include "macos_util.h"
34  
35 + // Generate PowerPC thunks for GetResource() replacements?
36 + #define POWERPC_GET_RESOURCE_THUNKS 1
37 +
38  
39   /*              NativeOp instruction format:
40 <                +------------+--------------------------+--+----------+------------+
41 <                |      6     |                          |FN|    OP    |      2     |
42 <                +------------+--------------------------+--+----------+------------+
43 <                 0         5 |6                       19 20 21      25 26        31
40 >                +------------+-------------------------+--+-----------+------------+
41 >                |      6     |                         |FN|    OP     |      2     |
42 >                +------------+-------------------------+--+-----------+------------+
43 >                 0         5 |6                      18 19 20      25 26        31
44   */
45  
46 < #define POWERPC_NATIVE_OP(LR, OP) \
47 <                (POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2)
46 > #define POWERPC_NATIVE_OP(FN, OP) \
47 >                (POWERPC_EMUL_OP | ((FN) << 12) | (((uint32)OP) << 6) | 2)
48  
49   /*
50   *  Return the fake PowerPC opcode to handle specified native code
# Line 51 | Line 55 | uint32 NativeOpcode(int selector)
55   {
56          uint32 opcode;
57          switch (selector) {
58 <        case NATIVE_DISABLE_INTERRUPT:
55 <        case NATIVE_ENABLE_INTERRUPT:
58 >        case NATIVE_CHECK_LOAD_INVOC:
59                  opcode = POWERPC_NATIVE_OP(0, selector);
60                  break;
61          case NATIVE_PATCH_NAME_REGISTRY:
# Line 79 | Line 82 | uint32 NativeOpcode(int selector)
82          case NATIVE_GET_1_IND_RESOURCE:
83          case NATIVE_R_GET_RESOURCE:
84          case NATIVE_MAKE_EXECUTABLE:
85 +        case NATIVE_SYNC_HOOK:
86 +        case NATIVE_BITBLT_HOOK:
87 +        case NATIVE_FILLRECT_HOOK:
88 +        case NATIVE_BITBLT:
89 +        case NATIVE_INVRECT:
90 +        case NATIVE_FILLRECT:
91                  opcode = POWERPC_NATIVE_OP(1, selector);
92                  break;
93          default:
# Line 90 | Line 99 | uint32 NativeOpcode(int selector)
99  
100  
101   /*
102 + *  Generate PowerPC thunks for GetResource() replacements
103 + */
104 +
105 + #if EMULATED_PPC
106 + static uint32 get_resource_func;
107 + static uint32 get_1_resource_func;
108 + static uint32 get_ind_resource_func;
109 + static uint32 get_1_ind_resource_func;
110 + static uint32 r_get_resource_func;
111 +
112 + static void generate_powerpc_thunks(void)
113 + {
114 +        static uint32 get_resource_template[] = {
115 +                PL(0x7c0802a6),         // mflr    r0
116 +                PL(0x90010008),         // stw     r0,8(r1)
117 +                PL(0x9421ffbc),         // stwu    r1,-68(r1)
118 +                PL(0x90610038),         // stw     r3,56(r1)
119 +                PL(0x9081003c),         // stw     r4,60(r1)
120 +                PL(0x00000000),         // lwz     r0,XLM_GET_RESOURCE(r0)
121 +                PL(0x80402834),         // lwz     r2,XLM_RES_LIB_TOC(r0)
122 +                PL(0x7c0903a6),         // mtctr   r0
123 +                PL(0x4e800421),         // bctrl
124 +                PL(0x90610040),         // stw     r3,64(r1)
125 +                PL(0x80610038),         // lwz     r3,56(r1)
126 +                PL(0xa881003e),         // lha     r4,62(r1)
127 +                PL(0x80a10040),         // lwz     r5,64(r1)
128 +                PL(0x00000001),         // <check_load_invoc>
129 +                PL(0x80610040),         // lwz     r3,64(r1)
130 +                PL(0x8001004c),         // lwz     r0,76(r1)
131 +                PL(0x7c0803a6),         // mtlr    r0
132 +                PL(0x38210044),         // addi    r1,r1,68
133 +                PL(0x4e800020)          // blr
134 +        };
135 +        const uint32 get_resource_template_size = sizeof(get_resource_template);
136 +
137 +        int xlm_index = -1, check_load_invoc_index = -1;
138 +        for (int i = 0; i < get_resource_template_size/4; i++) {
139 +                uint32 opcode = ntohl(get_resource_template[i]);
140 +                switch (opcode) {
141 +                case 0x00000000:
142 +                        xlm_index = i;
143 +                        break;
144 +                case 0x00000001:
145 +                        check_load_invoc_index = i;
146 +                        break;
147 +                }
148 +        }
149 +        assert(xlm_index != -1 && check_load_invoc_index != -1);
150 +
151 +        uint32 check_load_invoc_opcode = NativeOpcode(NATIVE_CHECK_LOAD_INVOC);
152 +        uint32 base;
153 +
154 +        // GetResource()
155 +        get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
156 +        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
157 +        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_RESOURCE);
158 +        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
159 +
160 +        // Get1Resource()
161 +        get_1_resource_func = base = SheepMem::Reserve(get_resource_template_size);
162 +        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
163 +        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_RESOURCE);
164 +        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
165 +
166 +        // GetIndResource()
167 +        get_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
168 +        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
169 +        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_IND_RESOURCE);
170 +        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
171 +
172 +        // Get1IndResource()
173 +        get_1_ind_resource_func = base = SheepMem::Reserve(get_resource_template_size);
174 +        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
175 +        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_GET_1_IND_RESOURCE);
176 +        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
177 +
178 +        // RGetResource()
179 +        r_get_resource_func = base = SheepMem::Reserve(get_resource_template_size);
180 +        Host2Mac_memcpy(base, get_resource_template, get_resource_template_size);
181 +        WriteMacInt32(base + xlm_index * 4, 0x80000000 | XLM_R_GET_RESOURCE);
182 +        WriteMacInt32(base + check_load_invoc_index * 4, check_load_invoc_opcode);
183 + }
184 + #endif
185 +
186 +
187 + /*
188   *  Initialize the thunks system
189   */
190  
# Line 111 | Line 206 | bool ThunksInit(void)
206                  native_op[i].tvect = base;
207                  native_op[i].func  = base + 8;
208          }
209 + #if POWERPC_GET_RESOURCE_THUNKS
210 +        generate_powerpc_thunks();
211 +        native_op[NATIVE_GET_RESOURCE].func = get_resource_func;
212 +        native_op[NATIVE_GET_1_RESOURCE].func = get_1_resource_func;
213 +        native_op[NATIVE_GET_IND_RESOURCE].func = get_ind_resource_func;
214 +        native_op[NATIVE_GET_1_IND_RESOURCE].func = get_1_ind_resource_func;
215 +        native_op[NATIVE_R_GET_RESOURCE].func = r_get_resource_func;
216 + #endif
217   #else
218 < #if defined(__linux__) || (defined(__APPLE__) && defined(__MACH__))
218 > #if defined(__linux__) || defined(__NetBSD__) || (defined(__APPLE__) && defined(__MACH__))
219   #define DEFINE_NATIVE_OP(ID, FUNC) do {                         \
220                  uintptr base = SheepMem::Reserve(8);            \
221                  WriteMacInt32(base + 0, (uint32)FUNC);          \
# Line 148 | Line 251 | bool ThunksInit(void)
251          DEFINE_NATIVE_OP(NATIVE_SERIAL_STATUS, SerialStatus);
252          DEFINE_NATIVE_OP(NATIVE_SERIAL_CLOSE, SerialClose);
253          DEFINE_NATIVE_OP(NATIVE_MAKE_EXECUTABLE, MakeExecutable);
254 +        DEFINE_NATIVE_OP(NATIVE_SYNC_HOOK, NQD_sync_hook);
255 +        DEFINE_NATIVE_OP(NATIVE_BITBLT_HOOK, NQD_bitblt_hook);
256 +        DEFINE_NATIVE_OP(NATIVE_FILLRECT_HOOK, NQD_fillrect_hook);
257 +        DEFINE_NATIVE_OP(NATIVE_BITBLT, NQD_bitblt);
258 +        DEFINE_NATIVE_OP(NATIVE_INVRECT, NQD_invrect);
259 +        DEFINE_NATIVE_OP(NATIVE_FILLRECT, NQD_fillrect);
260   #undef DEFINE_NATIVE_OP
261   #endif
262  

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