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comparison m68k_to_x86.c @ 543:915a1cb98bac

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Generate retrans_stub at runtime so it can use the generated save/load_context functions
author Michael Pavone <pavone@retrodev.com>
date Sun, 16 Feb 2014 18:17:59 -0800
parents 5d57fd8b44f8
children 8a26567852b7
comparison
equal deleted inserted replaced
542:5d57fd8b44f8 543:915a1cb98bac
32 32
33 void handle_cycle_limit(); 33 void handle_cycle_limit();
34 void m68k_native_addr(); 34 void m68k_native_addr();
35 void m68k_native_addr_and_sync(); 35 void m68k_native_addr_and_sync();
36 void m68k_invalid(); 36 void m68k_invalid();
37 void m68k_retrans_stub();
38 void set_sr(); 37 void set_sr();
39 void set_ccr(); 38 void set_ccr();
40 void get_sr(); 39 void get_sr();
41 void do_sync(); 40 void do_sync();
42 void bcd_add(); 41 void bcd_add();
4014 { 4013 {
4015 uint32_t inst_start = get_instruction_start(context->native_code_map, address | 0xFF0000); 4014 uint32_t inst_start = get_instruction_start(context->native_code_map, address | 0xFF0000);
4016 if (inst_start) { 4015 if (inst_start) {
4017 uint8_t * dst = get_native_address(context->native_code_map, inst_start); 4016 uint8_t * dst = get_native_address(context->native_code_map, inst_start);
4018 dst = mov_ir(dst, inst_start, SCRATCH2, SZ_D); 4017 dst = mov_ir(dst, inst_start, SCRATCH2, SZ_D);
4019 dst = jmp(dst, (uint8_t *)m68k_retrans_stub); 4018 x86_68k_options * options = context->options;
4019 if (!options->retrans_stub) {
4020 if (options->code_end - options->cur_code < 32) {
4021 size_t size = 1024*1024;
4022 options->cur_code = alloc_code(&size);
4023 options->code_end = options->cur_code + size;
4024 }
4025 uint8_t * rdst = options->retrans_stub = options->cur_code;
4026 rdst = call(rdst, options->save_context);
4027 rdst = push_r(rdst, CONTEXT);
4028 rdst = call(rdst, (uint8_t *)m68k_retranslate_inst);
4029 rdst = pop_r(rdst, CONTEXT);
4030 rdst = mov_rr(rdst, RAX, SCRATCH1, SZ_Q);
4031 rdst = call(rdst, options->load_context);
4032 rdst = jmp_r(rdst, SCRATCH1);
4033 options->cur_code = rdst;
4034 }
4035 dst = jmp(dst, options->retrans_stub);
4020 } 4036 }
4021 return context; 4037 return context;
4022 } 4038 }
4023 4039
4024 void insert_breakpoint(m68k_context * context, uint32_t address, uint8_t * bp_handler) 4040 void insert_breakpoint(m68k_context * context, uint32_t address, uint8_t * bp_handler)