filename | src/sh4/ia32mac.h |
changeset | 906:268ea359f884 |
prev | 905:4c17ebd9ef5e |
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). |
file | annotate | diff | log | raw |
nkeynes@539 | 1 | /** |
nkeynes@586 | 2 | * $Id$ |
nkeynes@539 | 3 | * |
nkeynes@736 | 4 | * Provides the implementation for the ia32 Mac OS X ABI variant |
nkeynes@736 | 5 | * (eg prologue, epilogue, and calling conventions). Main difference |
nkeynes@736 | 6 | * from ia32abi is that stack frames are aligned on 16-byte boundaries. |
nkeynes@539 | 7 | * |
nkeynes@539 | 8 | * Copyright (c) 2007 Nathan Keynes. |
nkeynes@539 | 9 | * |
nkeynes@539 | 10 | * This program is free software; you can redistribute it and/or modify |
nkeynes@539 | 11 | * it under the terms of the GNU General Public License as published by |
nkeynes@539 | 12 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@539 | 13 | * (at your option) any later version. |
nkeynes@539 | 14 | * |
nkeynes@539 | 15 | * This program is distributed in the hope that it will be useful, |
nkeynes@539 | 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@539 | 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@539 | 18 | * GNU General Public License for more details. |
nkeynes@539 | 19 | */ |
nkeynes@539 | 20 | |
nkeynes@736 | 21 | #ifndef lxdream_ia32mac_H |
nkeynes@736 | 22 | #define lxdream_ia32mac_H 1 |
nkeynes@539 | 23 | |
nkeynes@539 | 24 | #define load_ptr( reg, ptr ) load_imm32( reg, (uint32_t)ptr ); |
nkeynes@539 | 25 | |
nkeynes@539 | 26 | /** |
nkeynes@539 | 27 | * Note: clobbers EAX to make the indirect call - this isn't usually |
nkeynes@539 | 28 | * a problem since the callee will usually clobber it anyway. |
nkeynes@539 | 29 | */ |
nkeynes@539 | 30 | #define CALL_FUNC0_SIZE 13 |
nkeynes@539 | 31 | static inline void call_func0( void *ptr ) |
nkeynes@539 | 32 | { |
nkeynes@539 | 33 | int adj = (-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 34 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@905 | 35 | load_imm32(R_ECX, (uint32_t)ptr); |
nkeynes@905 | 36 | CALL_r32(R_ECX); |
nkeynes@539 | 37 | ADD_imm8s_r32( adj, R_ESP ); |
nkeynes@539 | 38 | } |
nkeynes@539 | 39 | |
nkeynes@905 | 40 | #ifdef HAVE_FASTCALL |
nkeynes@905 | 41 | static inline void call_func1( void *ptr, int arg1 ) |
nkeynes@905 | 42 | { |
nkeynes@905 | 43 | int adj = (-sh4_x86.stack_posn)&0x0F; |
nkeynes@905 | 44 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@905 | 45 | if( arg1 != R_EAX ) { |
nkeynes@905 | 46 | MOV_r32_r32( arg1, R_EAX ); |
nkeynes@905 | 47 | } |
nkeynes@905 | 48 | load_imm32(R_ECX, (uint32_t)ptr); |
nkeynes@905 | 49 | CALL_r32(R_ECX); |
nkeynes@905 | 50 | ADD_imm8s_r32( adj, R_ESP ); |
nkeynes@905 | 51 | } |
nkeynes@905 | 52 | |
nkeynes@905 | 53 | static inline void call_func2( void *ptr, int arg1, int arg2 ) |
nkeynes@905 | 54 | { |
nkeynes@905 | 55 | int adj = (-sh4_x86.stack_posn)&0x0F; |
nkeynes@905 | 56 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@905 | 57 | if( arg2 != R_EDX ) { |
nkeynes@905 | 58 | MOV_r32_r32( arg2, R_EDX ); |
nkeynes@905 | 59 | } |
nkeynes@905 | 60 | if( arg1 != R_EAX ) { |
nkeynes@905 | 61 | MOV_r32_r32( arg1, R_EAX ); |
nkeynes@905 | 62 | } |
nkeynes@905 | 63 | load_imm32(R_ECX, (uint32_t)ptr); |
nkeynes@905 | 64 | CALL_r32(R_ECX); |
nkeynes@905 | 65 | ADD_imm8s_r32( adj, R_ESP ); |
nkeynes@905 | 66 | } |
nkeynes@905 | 67 | |
nkeynes@905 | 68 | /** |
nkeynes@905 | 69 | * Write a double (64-bit) value into memory, with the first word in arg2a, and |
nkeynes@905 | 70 | * the second in arg2b |
nkeynes@905 | 71 | */ |
nkeynes@905 | 72 | static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b ) |
nkeynes@905 | 73 | { |
nkeynes@905 | 74 | PUSH_r32(arg2b); |
nkeynes@905 | 75 | PUSH_r32(addr); |
nkeynes@905 | 76 | call_func2(sh4_write_long, addr, arg2a); |
nkeynes@905 | 77 | POP_r32(R_EAX); |
nkeynes@905 | 78 | POP_r32(R_EDX); |
nkeynes@905 | 79 | ADD_imm8s_r32(4, R_EAX); |
nkeynes@905 | 80 | call_func0(sh4_write_long); |
nkeynes@905 | 81 | } |
nkeynes@905 | 82 | |
nkeynes@905 | 83 | /** |
nkeynes@905 | 84 | * Read a double (64-bit) value from memory, writing the first word into arg2a |
nkeynes@905 | 85 | * and the second into arg2b. The addr must not be in EAX |
nkeynes@905 | 86 | */ |
nkeynes@905 | 87 | static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b ) |
nkeynes@905 | 88 | { |
nkeynes@905 | 89 | PUSH_r32(addr); |
nkeynes@905 | 90 | call_func1(sh4_read_long, addr); |
nkeynes@905 | 91 | POP_r32(R_ECX); |
nkeynes@905 | 92 | PUSH_r32(R_EAX); |
nkeynes@905 | 93 | MOV_r32_r32(R_ECX, R_EAX); |
nkeynes@905 | 94 | ADD_imm8s_r32(4, R_EAX); |
nkeynes@905 | 95 | call_func0(sh4_read_long); |
nkeynes@905 | 96 | if( arg2b != R_EAX ) { |
nkeynes@905 | 97 | MOV_r32_r32(R_EAX, arg2b); |
nkeynes@905 | 98 | } |
nkeynes@905 | 99 | POP_r32(arg2a); |
nkeynes@905 | 100 | } |
nkeynes@905 | 101 | #else |
nkeynes@539 | 102 | static inline void call_func1( void *ptr, int arg1 ) |
nkeynes@539 | 103 | { |
nkeynes@539 | 104 | int adj = (-4-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 105 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@539 | 106 | PUSH_r32(arg1); |
nkeynes@539 | 107 | load_imm32(R_EAX, (uint32_t)ptr); |
nkeynes@539 | 108 | CALL_r32(R_EAX); |
nkeynes@539 | 109 | ADD_imm8s_r32( adj+4, R_ESP ); |
nkeynes@539 | 110 | sh4_x86.stack_posn -= 4; |
nkeynes@539 | 111 | } |
nkeynes@539 | 112 | |
nkeynes@539 | 113 | #define CALL_FUNC2_SIZE 15 |
nkeynes@539 | 114 | static inline void call_func2( void *ptr, int arg1, int arg2 ) |
nkeynes@539 | 115 | { |
nkeynes@539 | 116 | int adj = (-8-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 117 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@539 | 118 | PUSH_r32(arg2); |
nkeynes@539 | 119 | PUSH_r32(arg1); |
nkeynes@539 | 120 | load_imm32(R_EAX, (uint32_t)ptr); |
nkeynes@539 | 121 | CALL_r32(R_EAX); |
nkeynes@539 | 122 | ADD_imm8s_r32( adj+8, R_ESP ); |
nkeynes@539 | 123 | sh4_x86.stack_posn -= 8; |
nkeynes@539 | 124 | } |
nkeynes@539 | 125 | |
nkeynes@539 | 126 | /** |
nkeynes@539 | 127 | * Write a double (64-bit) value into memory, with the first word in arg2a, and |
nkeynes@539 | 128 | * the second in arg2b |
nkeynes@539 | 129 | */ |
nkeynes@539 | 130 | static inline void MEM_WRITE_DOUBLE( int addr, int arg2a, int arg2b ) |
nkeynes@539 | 131 | { |
nkeynes@539 | 132 | int adj = (-8-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 133 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@539 | 134 | ADD_imm8s_r32( 4, addr ); |
nkeynes@539 | 135 | PUSH_r32(arg2b); |
nkeynes@539 | 136 | PUSH_r32(addr); |
nkeynes@539 | 137 | ADD_imm8s_r32( -4, addr ); |
nkeynes@539 | 138 | SUB_imm8s_r32( 8, R_ESP ); |
nkeynes@539 | 139 | PUSH_r32(arg2a); |
nkeynes@539 | 140 | PUSH_r32(addr); |
nkeynes@539 | 141 | load_imm32(R_EAX, (uint32_t)sh4_write_long); |
nkeynes@539 | 142 | CALL_r32(R_EAX); |
nkeynes@539 | 143 | ADD_imm8s_r32( 16, R_ESP ); |
nkeynes@539 | 144 | load_imm32(R_EAX, (uint32_t)sh4_write_long); |
nkeynes@539 | 145 | CALL_r32(R_EAX); |
nkeynes@539 | 146 | ADD_imm8s_r32( adj+8, R_ESP ); |
nkeynes@539 | 147 | sh4_x86.stack_posn -= 16; |
nkeynes@539 | 148 | } |
nkeynes@539 | 149 | |
nkeynes@539 | 150 | /** |
nkeynes@539 | 151 | * Read a double (64-bit) value from memory, writing the first word into arg2a |
nkeynes@539 | 152 | * and the second into arg2b. The addr must not be in EAX |
nkeynes@539 | 153 | */ |
nkeynes@539 | 154 | static inline void MEM_READ_DOUBLE( int addr, int arg2a, int arg2b ) |
nkeynes@539 | 155 | { |
nkeynes@539 | 156 | int adj = (-4-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 157 | int adj2 = (-8-sh4_x86.stack_posn)&0x0F; |
nkeynes@539 | 158 | SUB_imm8s_r32( adj, R_ESP ); |
nkeynes@539 | 159 | PUSH_r32(addr); |
nkeynes@539 | 160 | load_imm32(R_EAX, (uint32_t)sh4_read_long); |
nkeynes@539 | 161 | CALL_r32(R_EAX); |
nkeynes@586 | 162 | POP_r32(R_ECX); |
nkeynes@539 | 163 | SUB_imm8s_r32( adj2-adj, R_ESP ); |
nkeynes@539 | 164 | PUSH_r32(R_EAX); |
nkeynes@586 | 165 | ADD_imm8s_r32( 4, R_ECX ); |
nkeynes@586 | 166 | PUSH_r32(R_ECX); |
nkeynes@539 | 167 | load_imm32(R_EAX, (uint32_t)sh4_read_long); |
nkeynes@539 | 168 | CALL_r32(R_EAX); |
nkeynes@539 | 169 | ADD_imm8s_r32( 4, R_ESP ); |
nkeynes@539 | 170 | MOV_r32_r32( R_EAX, arg2b ); |
nkeynes@539 | 171 | POP_r32(arg2a); |
nkeynes@539 | 172 | ADD_imm8s_r32( adj2, R_ESP ); |
nkeynes@539 | 173 | sh4_x86.stack_posn -= 4; |
nkeynes@539 | 174 | } |
nkeynes@539 | 175 | |
nkeynes@905 | 176 | #endif |
nkeynes@905 | 177 | |
nkeynes@539 | 178 | /** |
nkeynes@539 | 179 | * Emit the 'start of block' assembly. Sets up the stack frame and save |
nkeynes@539 | 180 | * SI/DI as required |
nkeynes@539 | 181 | */ |
nkeynes@901 | 182 | void enter_block( ) |
nkeynes@539 | 183 | { |
nkeynes@539 | 184 | PUSH_r32(R_EBP); |
nkeynes@539 | 185 | /* mov &sh4r, ebp */ |
nkeynes@669 | 186 | load_ptr( R_EBP, ((uint8_t *)&sh4r) + 128 ); |
nkeynes@539 | 187 | sh4_x86.stack_posn = 8; |
nkeynes@539 | 188 | } |
nkeynes@539 | 189 | |
nkeynes@539 | 190 | /** |
nkeynes@590 | 191 | * Exit the block with sh4r.new_pc written with the target pc |
nkeynes@539 | 192 | */ |
nkeynes@586 | 193 | void exit_block_pcset( sh4addr_t pc ) |
nkeynes@539 | 194 | { |
nkeynes@539 | 195 | load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5 |
nkeynes@539 | 196 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6 |
nkeynes@590 | 197 | load_spreg( R_EAX, R_PC ); |
nkeynes@586 | 198 | if( sh4_x86.tlb_on ) { |
nkeynes@736 | 199 | call_func1(xlat_get_code_by_vma,R_EAX); |
nkeynes@586 | 200 | } else { |
nkeynes@736 | 201 | call_func1(xlat_get_code,R_EAX); |
nkeynes@586 | 202 | } |
nkeynes@539 | 203 | POP_r32(R_EBP); |
nkeynes@539 | 204 | RET(); |
nkeynes@539 | 205 | } |
nkeynes@539 | 206 | |
nkeynes@590 | 207 | /** |
nkeynes@590 | 208 | * Exit the block with sh4r.new_pc written with the target pc |
nkeynes@590 | 209 | */ |
nkeynes@590 | 210 | void exit_block_newpcset( sh4addr_t pc ) |
nkeynes@590 | 211 | { |
nkeynes@590 | 212 | load_imm32( R_ECX, ((pc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5 |
nkeynes@590 | 213 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6 |
nkeynes@590 | 214 | load_spreg( R_EAX, R_NEW_PC ); |
nkeynes@590 | 215 | store_spreg( R_EAX, R_PC ); |
nkeynes@590 | 216 | if( sh4_x86.tlb_on ) { |
nkeynes@736 | 217 | call_func1(xlat_get_code_by_vma,R_EAX); |
nkeynes@590 | 218 | } else { |
nkeynes@736 | 219 | call_func1(xlat_get_code,R_EAX); |
nkeynes@590 | 220 | } |
nkeynes@590 | 221 | POP_r32(R_EBP); |
nkeynes@590 | 222 | RET(); |
nkeynes@590 | 223 | } |
nkeynes@590 | 224 | |
nkeynes@590 | 225 | |
nkeynes@539 | 226 | /** |
nkeynes@539 | 227 | * Exit the block to an absolute PC |
nkeynes@539 | 228 | */ |
nkeynes@539 | 229 | void exit_block( sh4addr_t pc, sh4addr_t endpc ) |
nkeynes@539 | 230 | { |
nkeynes@539 | 231 | load_imm32( R_ECX, pc ); // 5 |
nkeynes@539 | 232 | store_spreg( R_ECX, REG_OFFSET(pc) ); // 3 |
nkeynes@586 | 233 | if( IS_IN_ICACHE(pc) ) { |
nkeynes@736 | 234 | MOV_moff32_EAX( xlat_get_lut_entry(GET_ICACHE_PHYS(pc)) ); // 5 |
nkeynes@586 | 235 | } else if( sh4_x86.tlb_on ) { |
nkeynes@736 | 236 | call_func1(xlat_get_code_by_vma,R_ECX); |
nkeynes@586 | 237 | } else { |
nkeynes@736 | 238 | call_func1(xlat_get_code,R_ECX); |
nkeynes@586 | 239 | } |
nkeynes@586 | 240 | AND_imm8s_r32( 0xFC, R_EAX ); // 3 |
nkeynes@586 | 241 | load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5 |
nkeynes@586 | 242 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6 |
nkeynes@586 | 243 | POP_r32(R_EBP); |
nkeynes@586 | 244 | RET(); |
nkeynes@586 | 245 | } |
nkeynes@586 | 246 | |
nkeynes@586 | 247 | /** |
nkeynes@586 | 248 | * Exit the block to a relative PC |
nkeynes@586 | 249 | */ |
nkeynes@586 | 250 | void exit_block_rel( sh4addr_t pc, sh4addr_t endpc ) |
nkeynes@586 | 251 | { |
nkeynes@586 | 252 | load_imm32( R_ECX, pc - sh4_x86.block_start_pc ); // 5 |
nkeynes@586 | 253 | ADD_sh4r_r32( R_PC, R_ECX ); |
nkeynes@586 | 254 | store_spreg( R_ECX, REG_OFFSET(pc) ); // 3 |
nkeynes@586 | 255 | if( IS_IN_ICACHE(pc) ) { |
nkeynes@736 | 256 | MOV_moff32_EAX( xlat_get_lut_entry(GET_ICACHE_PHYS(pc)) ); // 5 |
nkeynes@586 | 257 | } else if( sh4_x86.tlb_on ) { |
nkeynes@736 | 258 | call_func1(xlat_get_code_by_vma,R_ECX); |
nkeynes@586 | 259 | } else { |
nkeynes@736 | 260 | call_func1(xlat_get_code,R_ECX); |
nkeynes@586 | 261 | } |
nkeynes@539 | 262 | AND_imm8s_r32( 0xFC, R_EAX ); // 3 |
nkeynes@539 | 263 | load_imm32( R_ECX, ((endpc - sh4_x86.block_start_pc)>>1)*sh4_cpu_period ); // 5 |
nkeynes@539 | 264 | ADD_r32_sh4r( R_ECX, REG_OFFSET(slice_cycle) ); // 6 |
nkeynes@539 | 265 | POP_r32(R_EBP); |
nkeynes@539 | 266 | RET(); |
nkeynes@539 | 267 | } |
nkeynes@539 | 268 | |
nkeynes@539 | 269 | /** |
nkeynes@539 | 270 | * Write the block trailer (exception handling block) |
nkeynes@539 | 271 | */ |
nkeynes@539 | 272 | void sh4_translate_end_block( sh4addr_t pc ) { |
nkeynes@539 | 273 | if( sh4_x86.branch_taken == FALSE ) { |
nkeynes@736 | 274 | // Didn't exit unconditionally already, so write the termination here |
nkeynes@736 | 275 | exit_block_rel( pc, pc ); |
nkeynes@539 | 276 | } |
nkeynes@539 | 277 | if( sh4_x86.backpatch_posn != 0 ) { |
nkeynes@736 | 278 | unsigned int i; |
nkeynes@736 | 279 | // Raise exception |
nkeynes@736 | 280 | uint8_t *end_ptr = xlat_output; |
nkeynes@736 | 281 | MOV_r32_r32( R_EDX, R_ECX ); |
nkeynes@736 | 282 | ADD_r32_r32( R_EDX, R_ECX ); |
nkeynes@736 | 283 | ADD_r32_sh4r( R_ECX, R_PC ); |
nkeynes@736 | 284 | MOV_moff32_EAX( &sh4_cpu_period ); |
nkeynes@736 | 285 | MUL_r32( R_EDX ); |
nkeynes@736 | 286 | ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) ); |
nkeynes@539 | 287 | |
nkeynes@586 | 288 | POP_r32(R_EDX); |
nkeynes@586 | 289 | call_func1( sh4_raise_exception, R_EDX ); |
nkeynes@736 | 290 | load_spreg( R_EAX, R_PC ); |
nkeynes@736 | 291 | if( sh4_x86.tlb_on ) { |
nkeynes@736 | 292 | call_func1(xlat_get_code_by_vma,R_EAX); |
nkeynes@736 | 293 | } else { |
nkeynes@736 | 294 | call_func1(xlat_get_code,R_EAX); |
nkeynes@736 | 295 | } |
nkeynes@736 | 296 | POP_r32(R_EBP); |
nkeynes@736 | 297 | RET(); |
nkeynes@539 | 298 | |
nkeynes@736 | 299 | // Exception already raised - just cleanup |
nkeynes@736 | 300 | uint8_t *preexc_ptr = xlat_output; |
nkeynes@736 | 301 | MOV_r32_r32( R_EDX, R_ECX ); |
nkeynes@736 | 302 | ADD_r32_r32( R_EDX, R_ECX ); |
nkeynes@736 | 303 | ADD_r32_sh4r( R_ECX, R_SPC ); |
nkeynes@736 | 304 | MOV_moff32_EAX( &sh4_cpu_period ); |
nkeynes@736 | 305 | MUL_r32( R_EDX ); |
nkeynes@736 | 306 | ADD_r32_sh4r( R_EAX, REG_OFFSET(slice_cycle) ); |
nkeynes@736 | 307 | load_spreg( R_EAX, R_PC ); |
nkeynes@736 | 308 | if( sh4_x86.tlb_on ) { |
nkeynes@736 | 309 | call_func1(xlat_get_code_by_vma,R_EAX); |
nkeynes@736 | 310 | } else { |
nkeynes@736 | 311 | call_func1(xlat_get_code,R_EAX); |
nkeynes@736 | 312 | } |
nkeynes@736 | 313 | POP_r32(R_EBP); |
nkeynes@736 | 314 | RET(); |
nkeynes@586 | 315 | |
nkeynes@736 | 316 | for( i=0; i< sh4_x86.backpatch_posn; i++ ) { |
nkeynes@736 | 317 | uint32_t *fixup_addr = (uint32_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset]; |
nkeynes@736 | 318 | *fixup_addr = xlat_output - (uint8_t *)&xlat_current_block->code[sh4_x86.backpatch_list[i].fixup_offset] - 4; |
nkeynes@736 | 319 | if( sh4_x86.backpatch_list[i].exc_code < 0 ) { |
nkeynes@736 | 320 | load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount ); |
nkeynes@736 | 321 | int stack_adj = -1 - sh4_x86.backpatch_list[i].exc_code; |
nkeynes@736 | 322 | if( stack_adj > 0 ) { |
nkeynes@736 | 323 | ADD_imm8s_r32( stack_adj, R_ESP ); |
nkeynes@736 | 324 | } |
nkeynes@736 | 325 | int rel = preexc_ptr - xlat_output; |
nkeynes@736 | 326 | JMP_rel(rel); |
nkeynes@736 | 327 | } else { |
nkeynes@736 | 328 | PUSH_imm32( sh4_x86.backpatch_list[i].exc_code ); |
nkeynes@736 | 329 | load_imm32( R_EDX, sh4_x86.backpatch_list[i].fixup_icount ); |
nkeynes@736 | 330 | int rel = end_ptr - xlat_output; |
nkeynes@736 | 331 | JMP_rel(rel); |
nkeynes@736 | 332 | } |
nkeynes@736 | 333 | } |
nkeynes@539 | 334 | } |
nkeynes@539 | 335 | } |
nkeynes@539 | 336 | |
nkeynes@905 | 337 | |
nkeynes@905 | 338 | /** |
nkeynes@905 | 339 | * The unwind methods only work if we compiled with DWARF2 frame information |
nkeynes@905 | 340 | * (ie -fexceptions), otherwise we have to use the direct frame scan. |
nkeynes@905 | 341 | */ |
nkeynes@905 | 342 | #ifdef HAVE_EXCEPTIONS |
nkeynes@905 | 343 | #include <unwind.h> |
nkeynes@905 | 344 | |
nkeynes@905 | 345 | struct UnwindInfo { |
nkeynes@906 | 346 | uintptr_t block_start; |
nkeynes@906 | 347 | uintptr_t block_end; |
nkeynes@905 | 348 | void *pc; |
nkeynes@905 | 349 | }; |
nkeynes@905 | 350 | |
nkeynes@905 | 351 | _Unwind_Reason_Code xlat_check_frame( struct _Unwind_Context *context, void *arg ) |
nkeynes@905 | 352 | { |
nkeynes@905 | 353 | struct UnwindInfo *info = arg; |
nkeynes@906 | 354 | void *pc = (void *)_Unwind_GetIP(context); |
nkeynes@906 | 355 | if( ((uintptr_t)pc) >= info->block_start && ((uintptr_t)pc) < info->block_end ) { |
nkeynes@906 | 356 | info->pc = pc; |
nkeynes@905 | 357 | return _URC_NORMAL_STOP; |
nkeynes@905 | 358 | } |
nkeynes@905 | 359 | |
nkeynes@905 | 360 | return _URC_NO_REASON; |
nkeynes@905 | 361 | } |
nkeynes@905 | 362 | |
nkeynes@906 | 363 | void *xlat_get_native_pc( void *code, uint32_t code_size ) |
nkeynes@905 | 364 | { |
nkeynes@905 | 365 | struct _Unwind_Exception exc; |
nkeynes@905 | 366 | struct UnwindInfo info; |
nkeynes@905 | 367 | |
nkeynes@906 | 368 | info.pc = NULL; |
nkeynes@906 | 369 | info.block_start = (uintptr_t)code; |
nkeynes@906 | 370 | info.block_end = info.block_start + code_size; |
nkeynes@905 | 371 | void *result = NULL; |
nkeynes@905 | 372 | _Unwind_Backtrace( xlat_check_frame, &info ); |
nkeynes@906 | 373 | return info.pc; |
nkeynes@905 | 374 | } |
nkeynes@905 | 375 | #else |
nkeynes@906 | 376 | void *xlat_get_native_pc( void *code, uint32_t code_size ) |
nkeynes@586 | 377 | { |
nkeynes@586 | 378 | void *result = NULL; |
nkeynes@586 | 379 | asm( |
nkeynes@736 | 380 | "mov %%ebp, %%eax\n\t" |
nkeynes@736 | 381 | "mov $0x8, %%ecx\n\t" |
nkeynes@736 | 382 | "mov %1, %%edx\n" |
nkeynes@736 | 383 | "frame_loop: test %%eax, %%eax\n\t" |
nkeynes@736 | 384 | "je frame_not_found\n\t" |
nkeynes@736 | 385 | "cmp (%%eax), %%edx\n\t" |
nkeynes@736 | 386 | "je frame_found\n\t" |
nkeynes@736 | 387 | "sub $0x1, %%ecx\n\t" |
nkeynes@736 | 388 | "je frame_not_found\n\t" |
nkeynes@736 | 389 | "movl (%%eax), %%eax\n\t" |
nkeynes@736 | 390 | "jmp frame_loop\n" |
nkeynes@736 | 391 | "frame_found: movl 0x4(%%eax), %0\n" |
nkeynes@736 | 392 | "frame_not_found:" |
nkeynes@736 | 393 | : "=r" (result) |
nkeynes@736 | 394 | : "r" (((uint8_t *)&sh4r) + 128 ) |
nkeynes@736 | 395 | : "eax", "ecx", "edx" ); |
nkeynes@586 | 396 | return result; |
nkeynes@586 | 397 | } |
nkeynes@905 | 398 | #endif |
nkeynes@586 | 399 | |
nkeynes@736 | 400 | #endif /* !lxdream_ia32mac.h */ |
nkeynes@539 | 401 | |
nkeynes@539 | 402 |
.