Mercurial > repos > blastem
diff m68k_to_x86.c @ 543:915a1cb98bac
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 |
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--- a/m68k_to_x86.c Sun Feb 16 16:50:10 2014 -0800 +++ b/m68k_to_x86.c Sun Feb 16 18:17:59 2014 -0800 @@ -34,7 +34,6 @@ void m68k_native_addr(); void m68k_native_addr_and_sync(); void m68k_invalid(); -void m68k_retrans_stub(); void set_sr(); void set_ccr(); void get_sr(); @@ -4016,7 +4015,24 @@ if (inst_start) { uint8_t * dst = get_native_address(context->native_code_map, inst_start); dst = mov_ir(dst, inst_start, SCRATCH2, SZ_D); - dst = jmp(dst, (uint8_t *)m68k_retrans_stub); + x86_68k_options * options = context->options; + if (!options->retrans_stub) { + if (options->code_end - options->cur_code < 32) { + size_t size = 1024*1024; + options->cur_code = alloc_code(&size); + options->code_end = options->cur_code + size; + } + uint8_t * rdst = options->retrans_stub = options->cur_code; + rdst = call(rdst, options->save_context); + rdst = push_r(rdst, CONTEXT); + rdst = call(rdst, (uint8_t *)m68k_retranslate_inst); + rdst = pop_r(rdst, CONTEXT); + rdst = mov_rr(rdst, RAX, SCRATCH1, SZ_Q); + rdst = call(rdst, options->load_context); + rdst = jmp_r(rdst, SCRATCH1); + options->cur_code = rdst; + } + dst = jmp(dst, options->retrans_stub); } return context; }