| /* |
| * 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 <stdarg.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <inttypes.h> |
| |
| #include "config.h" |
| |
| #define NO_CPU_IO_DEFS |
| #include "cpu.h" |
| #include "exec-all.h" |
| #include "disas.h" |
| |
| extern int dyngen_code(uint8_t *gen_code_buf, |
| uint16_t *label_offsets, uint16_t *jmp_offsets, |
| const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels); |
| |
| enum { |
| #define DEF(s, n, copy_size) INDEX_op_ ## s, |
| #include "opc.h" |
| #undef DEF |
| NB_OPS, |
| }; |
| |
| uint16_t gen_opc_buf[OPC_BUF_SIZE]; |
| uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE]; |
| long gen_labels[OPC_BUF_SIZE]; |
| int nb_gen_labels; |
| |
| target_ulong gen_opc_pc[OPC_BUF_SIZE]; |
| uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; |
| #if defined(TARGET_I386) |
| uint8_t gen_opc_cc_op[OPC_BUF_SIZE]; |
| #elif defined(TARGET_SPARC) |
| target_ulong gen_opc_npc[OPC_BUF_SIZE]; |
| target_ulong gen_opc_jump_pc[2]; |
| #elif defined(TARGET_MIPS) |
| uint32_t gen_opc_hflags[OPC_BUF_SIZE]; |
| #endif |
| |
| int code_copy_enabled = 1; |
| |
| #ifdef DEBUG_DISAS |
| static const char *op_str[] = { |
| #define DEF(s, n, copy_size) #s, |
| #include "opc.h" |
| #undef DEF |
| }; |
| |
| static uint8_t op_nb_args[] = { |
| #define DEF(s, n, copy_size) n, |
| #include "opc.h" |
| #undef DEF |
| }; |
| |
| static const unsigned short opc_copy_size[] = { |
| #define DEF(s, n, copy_size) copy_size, |
| #include "opc.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 |
| |
| /* compute label info */ |
| static void dyngen_labels(long *gen_labels, int nb_gen_labels, |
| uint8_t *gen_code_buf, const uint16_t *opc_buf) |
| { |
| uint8_t *gen_code_ptr; |
| int c, i; |
| unsigned long gen_code_addr[OPC_BUF_SIZE]; |
| |
| if (nb_gen_labels == 0) |
| return; |
| /* compute the address of each op code */ |
| |
| gen_code_ptr = gen_code_buf; |
| i = 0; |
| for(;;) { |
| c = opc_buf[i]; |
| gen_code_addr[i] =(unsigned long)gen_code_ptr; |
| if (c == INDEX_op_end) |
| break; |
| gen_code_ptr += opc_copy_size[c]; |
| i++; |
| } |
| |
| /* compute the address of each label */ |
| for(i = 0; i < nb_gen_labels; i++) { |
| gen_labels[i] = gen_code_addr[gen_labels[i]]; |
| } |
| } |
| |
| /* 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(CPUState *env, TranslationBlock *tb, |
| int max_code_size, int *gen_code_size_ptr) |
| { |
| uint8_t *gen_code_buf; |
| int gen_code_size; |
| |
| #ifdef USE_CODE_COPY |
| if (code_copy_enabled && |
| cpu_gen_code_copy(env, tb, max_code_size, &gen_code_size) == 0) { |
| /* nothing more to do */ |
| } else |
| #endif |
| { |
| if (gen_intermediate_code(env, tb) < 0) |
| return -1; |
| |
| /* generate machine code */ |
| tb->tb_next_offset[0] = 0xffff; |
| tb->tb_next_offset[1] = 0xffff; |
| gen_code_buf = tb->tc_ptr; |
| #ifdef USE_DIRECT_JUMP |
| /* the following two entries are optional (only used for string ops) */ |
| tb->tb_jmp_offset[2] = 0xffff; |
| tb->tb_jmp_offset[3] = 0xffff; |
| #endif |
| dyngen_labels(gen_labels, nb_gen_labels, gen_code_buf, gen_opc_buf); |
| |
| 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_labels); |
| } |
| *gen_code_size_ptr = gen_code_size; |
| #ifdef DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_OUT_ASM) { |
| fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr); |
| disas(logfile, tb->tc_ptr, *gen_code_size_ptr); |
| fprintf(logfile, "\n"); |
| fflush(logfile); |
| } |
| #endif |
| return 0; |
| } |
| |
| /* The cpu state corresponding to 'searched_pc' is restored. |
| */ |
| int cpu_restore_state(TranslationBlock *tb, |
| CPUState *env, unsigned long searched_pc, |
| void *puc) |
| { |
| int j, c; |
| unsigned long tc_ptr; |
| uint16_t *opc_ptr; |
| |
| #ifdef USE_CODE_COPY |
| if (tb->cflags & CF_CODE_COPY) { |
| return cpu_restore_state_copy(tb, env, searched_pc, puc); |
| } |
| #endif |
| if (gen_intermediate_code_pc(env, tb) < 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--; |
| #if defined(TARGET_I386) |
| { |
| int cc_op; |
| #ifdef DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_OP) { |
| int i; |
| fprintf(logfile, "RESTORE:\n"); |
| for(i=0;i<=j; i++) { |
| if (gen_opc_instr_start[i]) { |
| fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]); |
| } |
| } |
| fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n", |
| searched_pc, j, gen_opc_pc[j] - tb->cs_base, |
| (uint32_t)tb->cs_base); |
| } |
| #endif |
| env->eip = gen_opc_pc[j] - tb->cs_base; |
| cc_op = gen_opc_cc_op[j]; |
| if (cc_op != CC_OP_DYNAMIC) |
| env->cc_op = cc_op; |
| } |
| #elif defined(TARGET_ARM) |
| env->regs[15] = gen_opc_pc[j]; |
| #elif defined(TARGET_SPARC) |
| { |
| target_ulong npc; |
| env->pc = gen_opc_pc[j]; |
| npc = gen_opc_npc[j]; |
| if (npc == 1) { |
| /* dynamic NPC: already stored */ |
| } else if (npc == 2) { |
| target_ulong t2 = (target_ulong)puc; |
| /* jump PC: use T2 and the jump targets of the translation */ |
| if (t2) |
| env->npc = gen_opc_jump_pc[0]; |
| else |
| env->npc = gen_opc_jump_pc[1]; |
| } else { |
| env->npc = npc; |
| } |
| } |
| #elif defined(TARGET_PPC) |
| { |
| int type; |
| /* for PPC, we need to look at the micro operation to get the |
| access type */ |
| env->nip = gen_opc_pc[j]; |
| switch(c) { |
| #if defined(CONFIG_USER_ONLY) |
| #define CASE3(op)\ |
| case INDEX_op_ ## op ## _raw |
| #else |
| #define CASE3(op)\ |
| case INDEX_op_ ## op ## _user:\ |
| case INDEX_op_ ## op ## _kernel |
| #endif |
| |
| CASE3(stfd): |
| CASE3(stfs): |
| CASE3(lfd): |
| CASE3(lfs): |
| type = ACCESS_FLOAT; |
| break; |
| CASE3(lwarx): |
| type = ACCESS_RES; |
| break; |
| CASE3(stwcx): |
| type = ACCESS_RES; |
| break; |
| CASE3(eciwx): |
| CASE3(ecowx): |
| type = ACCESS_EXT; |
| break; |
| default: |
| type = ACCESS_INT; |
| break; |
| } |
| env->access_type = type; |
| } |
| #elif defined(TARGET_MIPS) |
| env->PC = gen_opc_pc[j]; |
| env->hflags &= ~MIPS_HFLAG_BMASK; |
| env->hflags |= gen_opc_hflags[j]; |
| #endif |
| return 0; |
| } |
