lxdream 0.9.1| filename | src/sh4/ia64abi.h |
| changeset | 908:a00debcf2600 |
| prev | 901:32c5cf5e206f |
| next | 926:68f3e0fe02f1 |
| author | nkeynes |
| date | Thu Dec 11 23:26:03 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Disable the generational translation cache - I've got no evidence that it actually helps performance, and it simplifies things to get rid of it (in particular, translated code doesn't have to worry about being moved now). |
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1 /**
2 * $Id$
3 *
4 * Provides the implementation for the AMD64 ABI (eg prologue, epilogue, and
5 * calling conventions)
6 *
7 * Copyright (c) 2007 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #ifndef lxdream_ia64abi_H
21 #define lxdream_ia64abi_H 1
23 #include <unwind.h>
25 #define load_ptr( reg, ptr ) load_imm64( reg, (uint64_t)ptr );
27 /**
28 * Note: clobbers EAX to make the indirect call - this isn't usually
29 * a problem since the callee will usually clobber it anyway.
30 * Size: 12 bytes
31 */
32 #define CALL_FUNC0_SIZE 12
33 static inline void call_func0( void *ptr )
34 {
35 load_imm64(R_EAX, (uint64_t)ptr);
36 CALL_r32(R_EAX);
37 }
39 #define CALL_FUNC1_SIZE 14
40 static inline void call_func1( void *ptr, int arg1 )
41 {
42 REXW(); MOV_r32_r32(arg1, R_EDI);
43 call_func0(ptr);
44 }
46 #define CALL_FUNC2_SIZE 16
47 static inline void call_func2( void *ptr, int arg1, int arg2 )
48 {
49 REXW(); MOV_r32_r32(arg1, R_EDI);
50 REXW(); MOV_r32_r32(arg2, R_ESI);
51 call_func0(ptr);
52 }
54 #define MEM_WRITE_DOUBLE_SIZE 35
55 /**
56 * Write a double (64-bit) value into memory, with the first word in arg2a, and
57 * the second in arg2b
58 */
59 static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b )
60 {
61 PUSH_r32(arg2b);
62 PUSH_r32(addr);
63 call_func2(sh4_write_long, addr, arg2a);
64 POP_r32(R_EDI);
65 POP_r32(R_ESI);
66 ADD_imm8s_r32(4, R_EDI);
67 call_func0(sh4_write_long);
68 }
70 #define MEM_READ_DOUBLE_SIZE 43
71 /**
72 * Read a double (64-bit) value from memory, writing the first word into arg2a
73 * and the second into arg2b. The addr must not be in EAX
74 */
75 static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b )
76 {
77 REXW(); SUB_imm8s_r32( 8, R_ESP );
78 PUSH_r32(addr);
79 call_func1(sh4_read_long, addr);
80 POP_r32(R_EDI);
81 PUSH_r32(R_EAX);
82 ADD_imm8s_r32(4, R_EDI);
83 call_func0(sh4_read_long);
84 MOV_r32_r32(R_EAX, arg2b);
85 POP_r32(arg2a);
86 REXW(); ADD_imm8s_r32( 8, R_ESP );
87 }
90 /**
91 * Emit the 'start of block' assembly. Sets up the stack frame and save
92 * SI/DI as required
93 */
94 void enter_block( )
95 {
96 PUSH_r32(R_EBP);
97 /* mov &sh4r, ebp */
98 load_ptr( R_EBP, ((uint8_t *)&sh4r) + 128 );
99 }
101 /**
102 * Exit the block with sh4r.pc already written
103 */
104 void exit_block_pcset( sh4addr_t pc )
105 {
106 load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
107 ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
108 load_spreg( R_EAX, R_PC );
109 if( sh4_x86.tlb_on ) {
110 call_func1(xlat_get_code_by_vma,R_EAX);
111 } else {
112 call_func1(xlat_get_code,R_EAX);
113 }
114 POP_r32(R_EBP);
115 RET();
116 }
118 /**
119 * Exit the block with sh4r.new_pc written with the target address
120 */
121 void exit_block_newpcset( sh4addr_t pc )
122 {
123 load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
124 ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
125 load_spreg( R_EAX, R_NEW_PC );
126 store_spreg( R_EAX, R_PC );
127 if( sh4_x86.tlb_on ) {
128 call_func1(xlat_get_code_by_vma,R_EAX);
129 } else {
130 call_func1(xlat_get_code,R_EAX);
131 }
132 POP_r32(R_EBP);
133 RET();
134 }
136 #define EXIT_BLOCK_SIZE(pc) (25 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
137 /**
138 * Exit the block to an absolute PC
139 */
140 void exit_block( sh4addr_t pc, sh4addr_t endpc )
141 {
142 load_imm32( R_ECX, pc ); // 5
143 store_spreg( R_ECX, REG_OFFSET(pc) ); // 3
144 if( IS_IN_ICACHE(pc) ) {
145 REXW(); MOV_moff32_EAX( xlat_get_lut_entry(pc) );
146 } else if( sh4_x86.tlb_on ) {
147 call_func1(xlat_get_code_by_vma, R_ECX);
148 } else {
149 call_func1(xlat_get_code,R_ECX);
150 }
151 REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
152 load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
153 ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
154 POP_r32(R_EBP);
155 RET();
156 }
159 #define EXIT_BLOCK_REL_SIZE(pc) (28 + (IS_IN_ICACHE(pc)?10:CALL_FUNC1_SIZE))
161 /**
162 * Exit the block to a relative PC
163 */
164 void exit_block_rel( sh4addr_t pc, sh4addr_t endpc )
165 {
166 load_imm32( R_ECX, pc - sh4_x86.block_start_pc ); // 5
167 ADD_sh4r_r32( R_PC, R_ECX );
168 store_spreg( R_ECX, REG_OFFSET(pc) ); // 3
169 if( IS_IN_ICACHE(pc) ) {
170 REXW(); MOV_moff32_EAX( xlat_get_lut_entry(GET_ICACHE_PHYS(pc)) ); // 5
171 } else if( sh4_x86.tlb_on ) {
172 call_func1(xlat_get_code_by_vma,R_ECX);
173 } else {
174 call_func1(xlat_get_code,R_ECX);
175 }
176 REXW(); AND_imm8s_r32( 0xFC, R_EAX ); // 4
177 load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5
178 ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6
179 POP_r32(R_EBP);
180 RET();
181 }
183 /**
184 * Write the block trailer (exception handling block)
185 */
186 void sh4_translate_end_block( sh4addr_t pc ) {
187 if( sh4_x86.branch_taken == FALSE ) {
188 // Didn't exit unconditionally already, so write the termination here
189 exit_block_rel( pc, pc );
190 }
191 if( sh4_x86.backpatch_posn != 0 ) {
192 unsigned int i;
193 // Raise exception
194 uint8_t *end_ptr = xlat_output;
195 MOV_r32_r32( R_EDX, R_ECX );
196 ADD_r32_r32( R_EDX, R_ECX );
197 ADD_r32_sh4r( R_ECX, R_PC );
198 MOV_moff32_EAX( &sh4_cpu_period );
199 MUL_r32( R_EDX );
200 ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
202 call_func0( sh4_raise_exception );
203 load_spreg( R_EAX, R_PC );
204 if( sh4_x86.tlb_on ) {
205 call_func1(xlat_get_code_by_vma,R_EAX);
206 } else {
207 call_func1(xlat_get_code,R_EAX);
208 }
209 POP_r32(R_EBP);
210 RET();
212 // Exception already raised - just cleanup
213 uint8_t *preexc_ptr = xlat_output;
214 MOV_r32_r32( R_EDX, R_ECX );
215 ADD_r32_r32( R_EDX, R_ECX );
216 ADD_r32_sh4r( R_ECX, R_SPC );
217 MOV_moff32_EAX( &sh4_cpu_period );
218 MUL_r32( R_EDX );
219 ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) );
220 load_spreg( R_EDI, R_PC );
221 if( sh4_x86.tlb_on ) {
222 call_func0(xlat_get_code_by_vma);
223 } else {
224 call_func0(xlat_get_code);
225 }
226 POP_r32(R_EBP);
227 RET();
229 for( i=0; i< sh4_x86.backpatch_posn; i++ ) {
230 uint32_t *fixup_addr = (uint32_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset];
231 *fixup_addr = xlat_output - (uint8_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset] - 4;
232 if( sh4_x86.backpatch_list[i].exc_code < 0 ) {
233 load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
234 int stack_adj = -1 - sh4_x86.backpatch_list[i].exc_code;
235 if( stack_adj > 0 ) {
236 ADD_imm8s_r32( stack_adj*4, R_ESP );
237 }
238 int rel = preexc_ptr - xlat_output;
239 JMP_rel(rel);
240 } else {
241 load_imm32( R_EDI, sh4_x86.backpatch_list[i].exc_code );
242 load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount );
243 int rel = end_ptr - xlat_output;
244 JMP_rel(rel);
245 }
246 }
247 }
248 }
250 _Unwind_Reason_Code xlat_check_frame( struct _Unwind_Context *context, void *arg )
251 {
252 void *rbp = (void *)_Unwind_GetGR(context, 6);
253 void *expect = (((uint8_t *)&sh4r) + 128 );
254 if( rbp == expect ) {
255 void **result = (void **)arg;
256 *result = (void *)_Unwind_GetIP(context);
257 return _URC_NORMAL_STOP;
258 }
260 return _URC_NO_REASON;
261 }
263 void *xlat_get_native_pc( void *code, uint32_t size )
264 {
265 struct _Unwind_Exception exc;
267 void *result = NULL;
268 _Unwind_Backtrace( xlat_check_frame, &result );
269 return result;
270 }
272 #endif /* !lxdream_ia64abi_H */
.