/* * Host code generation * * Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include "config.h" #define IN_OP_I386 #include "cpu-" TARGET_ARCH ".h" #include "exec.h" #include "disas.h" enum { #define DEF(s, n, copy_size) INDEX_op_ ## s, #include "opc-" TARGET_ARCH ".h" #undef DEF NB_OPS, }; #include "dyngen.h" #include "op-" TARGET_ARCH ".h" uint16_t gen_opc_buf[OPC_BUF_SIZE]; uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE]; uint32_t gen_opc_pc[OPC_BUF_SIZE]; uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; #ifdef DEBUG_DISAS static const char *op_str[] = { #define DEF(s, n, copy_size) #s, #include "opc-" TARGET_ARCH ".h" #undef DEF }; static uint8_t op_nb_args[] = { #define DEF(s, n, copy_size) n, #include "opc-" TARGET_ARCH ".h" #undef DEF }; void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf) { const uint16_t *opc_ptr; const uint32_t *opparam_ptr; int c, n, i; opc_ptr = opc_buf; opparam_ptr = opparam_buf; for(;;) { c = *opc_ptr++; n = op_nb_args[c]; fprintf(logfile, "0x%04x: %s", (int)(opc_ptr - opc_buf - 1), op_str[c]); for(i = 0; i < n; i++) { fprintf(logfile, " 0x%x", opparam_ptr[i]); } fprintf(logfile, "\n"); if (c == INDEX_op_end) break; opparam_ptr += n; } } #endif /* return non zero if the very first instruction is invalid so that the virtual CPU can trigger an exception. '*gen_code_size_ptr' contains the size of the generated code (host code). */ int cpu_gen_code(TranslationBlock *tb, int max_code_size, int *gen_code_size_ptr) { uint8_t *gen_code_buf; int gen_code_size; if (gen_intermediate_code(tb, 0) < 0) return -1; /* generate machine code */ tb->tb_next_offset[0] = 0xffff; tb->tb_next_offset[1] = 0xffff; gen_code_buf = tb->tc_ptr; gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset, #ifdef USE_DIRECT_JUMP tb->tb_jmp_offset, #else NULL, #endif gen_opc_buf, gen_opparam_buf); *gen_code_size_ptr = gen_code_size; #ifdef DEBUG_DISAS if (loglevel) { fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr); disas(logfile, gen_code_buf, *gen_code_size_ptr, 1, 0); fprintf(logfile, "\n"); fflush(logfile); } #endif return 0; } static const unsigned short opc_copy_size[] = { #define DEF(s, n, copy_size) copy_size, #include "opc-i386.h" #undef DEF }; /* The simulated PC corresponding to 'searched_pc' in the generated code is searched. 0 is returned if found. *found_pc contains the found PC. */ int cpu_search_pc(TranslationBlock *tb, uint32_t *found_pc, unsigned long searched_pc) { int j, c; unsigned long tc_ptr; uint16_t *opc_ptr; if (gen_intermediate_code(tb, 1) < 0) return -1; /* find opc index corresponding to search_pc */ tc_ptr = (unsigned long)tb->tc_ptr; if (searched_pc < tc_ptr) return -1; j = 0; opc_ptr = gen_opc_buf; for(;;) { c = *opc_ptr; if (c == INDEX_op_end) return -1; tc_ptr += opc_copy_size[c]; if (searched_pc < tc_ptr) break; opc_ptr++; } j = opc_ptr - gen_opc_buf; /* now find start of instruction before */ while (gen_opc_instr_start[j] == 0) j--; *found_pc = gen_opc_pc[j]; return 0; }