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/*
* 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];
#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;
}
#endif
return 0;
}
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