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/*
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* i386 on i386 translation
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h" |
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include <assert.h> |
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "disas.h" |
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#ifdef USE_CODE_COPY
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#include <signal.h> |
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#include <sys/mman.h> |
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#include <sys/ucontext.h> |
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extern char exec_loop; |
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/* operand size */
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enum {
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OT_BYTE = 0,
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OT_WORD, |
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OT_LONG, |
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OT_QUAD, |
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}; |
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#define PREFIX_REPZ 0x01 |
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#define PREFIX_REPNZ 0x02 |
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#define PREFIX_LOCK 0x04 |
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#define PREFIX_DATA 0x08 |
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#define PREFIX_ADR 0x10 |
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typedef struct DisasContext { |
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/* current insn context */
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int override; /* -1 if no override */ |
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int prefix;
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int aflag, dflag;
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target_ulong pc; /* pc = eip + cs_base */
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int is_jmp; /* 1 = means jump (stop translation), 2 means CPU |
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static state change (stop translation) */
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/* code output */
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uint8_t *gen_code_ptr; |
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uint8_t *gen_code_start; |
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/* current block context */
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target_ulong cs_base; /* base of CS segment */
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int pe; /* protected mode */ |
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int code32; /* 32 bit code segment */ |
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int f_st; /* currently unused */ |
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int vm86; /* vm86 mode */ |
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int cpl;
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int iopl;
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int flags;
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struct TranslationBlock *tb;
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} DisasContext; |
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#define CPU_FIELD_OFFSET(field) offsetof(CPUState, field)
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#define CPU_SEG 0x64 /* fs override */ |
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static inline void gb(DisasContext *s, uint32_t val) |
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{ |
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*s->gen_code_ptr++ = val; |
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} |
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static inline void gw(DisasContext *s, uint32_t val) |
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{ |
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*s->gen_code_ptr++ = val; |
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*s->gen_code_ptr++ = val >> 8;
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} |
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static inline void gl(DisasContext *s, uint32_t val) |
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{ |
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*s->gen_code_ptr++ = val; |
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*s->gen_code_ptr++ = val >> 8;
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*s->gen_code_ptr++ = val >> 16;
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*s->gen_code_ptr++ = val >> 24;
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} |
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static inline void gjmp(DisasContext *s, long val) |
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{ |
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gb(s, 0xe9); /* jmp */ |
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gl(s, val - (long)(s->gen_code_ptr + 4)); |
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} |
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static inline void gen_movl_addr_im(DisasContext *s, |
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uint32_t addr, uint32_t val) |
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{ |
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gb(s, CPU_SEG); /* seg movl im, addr */
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gb(s, 0xc7);
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gb(s, 0x05);
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gl(s, addr); |
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gl(s, val); |
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} |
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static inline void gen_movw_addr_im(DisasContext *s, |
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uint32_t addr, uint32_t val) |
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{ |
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gb(s, CPU_SEG); /* seg movl im, addr */
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gb(s, 0x66);
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gb(s, 0xc7);
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gb(s, 0x05);
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gl(s, addr); |
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gw(s, val); |
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} |
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static void gen_jmp(DisasContext *s, uint32_t target_eip) |
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{ |
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TranslationBlock *tb = s->tb; |
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gb(s, 0xe9); /* jmp */ |
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tb->tb_jmp_offset[0] = s->gen_code_ptr - s->gen_code_start;
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gl(s, 0);
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tb->tb_next_offset[0] = s->gen_code_ptr - s->gen_code_start;
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), target_eip); |
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb); |
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gjmp(s, (long)&exec_loop);
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s->is_jmp = 1;
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} |
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static void gen_jcc(DisasContext *s, int op, |
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uint32_t target_eip, uint32_t next_eip) |
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{ |
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TranslationBlock *tb = s->tb; |
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gb(s, 0x0f); /* jcc */ |
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gb(s, 0x80 + op);
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tb->tb_jmp_offset[0] = s->gen_code_ptr - s->gen_code_start;
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gl(s, 0);
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gb(s, 0xe9); /* jmp */ |
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tb->tb_jmp_offset[1] = s->gen_code_ptr - s->gen_code_start;
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gl(s, 0);
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tb->tb_next_offset[0] = s->gen_code_ptr - s->gen_code_start;
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), target_eip); |
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb); |
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gjmp(s, (long)&exec_loop);
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tb->tb_next_offset[1] = s->gen_code_ptr - s->gen_code_start;
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), next_eip); |
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb | 1);
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gjmp(s, (long)&exec_loop);
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s->is_jmp = 1;
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} |
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static void gen_eob(DisasContext *s) |
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{ |
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gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), 0);
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gjmp(s, (long)&exec_loop);
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s->is_jmp = 1;
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} |
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static inline void gen_lea_modrm(DisasContext *s, int modrm) |
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{ |
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int havesib;
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int base, disp;
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int index;
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int scale;
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int mod, rm, code;
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mod = (modrm >> 6) & 3; |
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rm = modrm & 7;
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if (s->aflag) {
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havesib = 0;
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base = rm; |
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index = 0;
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scale = 0;
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if (base == 4) { |
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havesib = 1;
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code = ldub_code(s->pc++); |
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scale = (code >> 6) & 3; |
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index = (code >> 3) & 7; |
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base = code & 7;
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} |
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switch (mod) {
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case 0: |
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if (base == 5) { |
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base = -1;
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disp = ldl_code(s->pc); |
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s->pc += 4;
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} else {
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disp = 0;
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} |
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break;
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case 1: |
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disp = (int8_t)ldub_code(s->pc++); |
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break;
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default:
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case 2: |
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disp = ldl_code(s->pc); |
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s->pc += 4;
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break;
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} |
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} else {
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switch (mod) {
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case 0: |
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if (rm == 6) { |
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disp = lduw_code(s->pc); |
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s->pc += 2;
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} else {
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disp = 0;
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} |
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break;
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case 1: |
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disp = (int8_t)ldub_code(s->pc++); |
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break;
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default:
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case 2: |
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disp = lduw_code(s->pc); |
242 |
s->pc += 2;
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break;
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} |
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} |
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} |
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static inline void parse_modrm(DisasContext *s, int modrm) |
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{ |
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if ((modrm & 0xc0) != 0xc0) |
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gen_lea_modrm(s, modrm); |
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} |
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static inline uint32_t insn_get(DisasContext *s, int ot) |
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{ |
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uint32_t ret; |
257 |
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switch(ot) {
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case OT_BYTE:
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ret = ldub_code(s->pc); |
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s->pc++; |
262 |
break;
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case OT_WORD:
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ret = lduw_code(s->pc); |
265 |
s->pc += 2;
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break;
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default:
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case OT_LONG:
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ret = ldl_code(s->pc); |
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s->pc += 4;
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break;
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} |
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return ret;
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} |
275 |
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/* convert one instruction. s->is_jmp is set if the translation must
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be stopped. */
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static int disas_insn(DisasContext *s) |
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{ |
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target_ulong pc_start, pc_tmp, pc_start_insn; |
281 |
int b, prefixes, aflag, dflag, next_eip, val;
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int ot;
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int modrm, mod, op, rm;
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pc_start = s->pc; |
286 |
prefixes = 0;
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aflag = s->code32; |
288 |
dflag = s->code32; |
289 |
s->override = -1;
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next_byte:
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b = ldub_code(s->pc); |
292 |
s->pc++; |
293 |
/* check prefixes */
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switch (b) {
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case 0xf3: |
296 |
prefixes |= PREFIX_REPZ; |
297 |
goto next_byte;
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case 0xf2: |
299 |
prefixes |= PREFIX_REPNZ; |
300 |
goto next_byte;
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case 0xf0: |
302 |
prefixes |= PREFIX_LOCK; |
303 |
goto next_byte;
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case 0x2e: |
305 |
s->override = R_CS; |
306 |
goto next_byte;
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case 0x36: |
308 |
s->override = R_SS; |
309 |
goto next_byte;
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case 0x3e: |
311 |
s->override = R_DS; |
312 |
goto next_byte;
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case 0x26: |
314 |
s->override = R_ES; |
315 |
goto next_byte;
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316 |
case 0x64: |
317 |
s->override = R_FS; |
318 |
goto next_byte;
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319 |
case 0x65: |
320 |
s->override = R_GS; |
321 |
goto next_byte;
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322 |
case 0x66: |
323 |
prefixes |= PREFIX_DATA; |
324 |
goto next_byte;
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325 |
case 0x67: |
326 |
prefixes |= PREFIX_ADR; |
327 |
goto next_byte;
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328 |
} |
329 |
|
330 |
if (prefixes & PREFIX_DATA)
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dflag ^= 1;
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332 |
if (prefixes & PREFIX_ADR)
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aflag ^= 1;
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334 |
|
335 |
s->prefix = prefixes; |
336 |
s->aflag = aflag; |
337 |
s->dflag = dflag; |
338 |
|
339 |
/* lock generation */
|
340 |
if (prefixes & PREFIX_LOCK)
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341 |
goto unsupported_op;
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342 |
if (s->override == R_FS || s->override == R_GS || s->override == R_CS)
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343 |
goto unsupported_op;
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344 |
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345 |
pc_start_insn = s->pc - 1;
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346 |
/* now check op code */
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347 |
reswitch:
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348 |
switch(b) {
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349 |
case 0x0f: |
350 |
/**************************/
|
351 |
/* extended op code */
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352 |
b = ldub_code(s->pc++) | 0x100;
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353 |
goto reswitch;
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354 |
|
355 |
/**************************/
|
356 |
/* arith & logic */
|
357 |
case 0x00 ... 0x05: |
358 |
case 0x08 ... 0x0d: |
359 |
case 0x10 ... 0x15: |
360 |
case 0x18 ... 0x1d: |
361 |
case 0x20 ... 0x25: |
362 |
case 0x28 ... 0x2d: |
363 |
case 0x30 ... 0x35: |
364 |
case 0x38 ... 0x3d: |
365 |
{ |
366 |
int f;
|
367 |
f = (b >> 1) & 3; |
368 |
|
369 |
if ((b & 1) == 0) |
370 |
ot = OT_BYTE; |
371 |
else
|
372 |
ot = dflag ? OT_LONG : OT_WORD; |
373 |
|
374 |
switch(f) {
|
375 |
case 0: /* OP Ev, Gv */ |
376 |
modrm = ldub_code(s->pc++); |
377 |
parse_modrm(s, modrm); |
378 |
break;
|
379 |
case 1: /* OP Gv, Ev */ |
380 |
modrm = ldub_code(s->pc++); |
381 |
parse_modrm(s, modrm); |
382 |
break;
|
383 |
case 2: /* OP A, Iv */ |
384 |
insn_get(s, ot); |
385 |
break;
|
386 |
} |
387 |
} |
388 |
break;
|
389 |
|
390 |
case 0x80: /* GRP1 */ |
391 |
case 0x81: |
392 |
case 0x82: |
393 |
case 0x83: |
394 |
{ |
395 |
if ((b & 1) == 0) |
396 |
ot = OT_BYTE; |
397 |
else
|
398 |
ot = dflag ? OT_LONG : OT_WORD; |
399 |
|
400 |
modrm = ldub_code(s->pc++); |
401 |
parse_modrm(s, modrm); |
402 |
|
403 |
switch(b) {
|
404 |
default:
|
405 |
case 0x80: |
406 |
case 0x81: |
407 |
case 0x82: |
408 |
insn_get(s, ot); |
409 |
break;
|
410 |
case 0x83: |
411 |
insn_get(s, OT_BYTE); |
412 |
break;
|
413 |
} |
414 |
} |
415 |
break;
|
416 |
|
417 |
/**************************/
|
418 |
/* inc, dec, and other misc arith */
|
419 |
case 0x40 ... 0x47: /* inc Gv */ |
420 |
break;
|
421 |
case 0x48 ... 0x4f: /* dec Gv */ |
422 |
break;
|
423 |
case 0xf6: /* GRP3 */ |
424 |
case 0xf7: |
425 |
if ((b & 1) == 0) |
426 |
ot = OT_BYTE; |
427 |
else
|
428 |
ot = dflag ? OT_LONG : OT_WORD; |
429 |
|
430 |
modrm = ldub_code(s->pc++); |
431 |
op = (modrm >> 3) & 7; |
432 |
parse_modrm(s, modrm); |
433 |
|
434 |
switch(op) {
|
435 |
case 0: /* test */ |
436 |
insn_get(s, ot); |
437 |
break;
|
438 |
case 2: /* not */ |
439 |
break;
|
440 |
case 3: /* neg */ |
441 |
break;
|
442 |
case 4: /* mul */ |
443 |
break;
|
444 |
case 5: /* imul */ |
445 |
break;
|
446 |
case 6: /* div */ |
447 |
break;
|
448 |
case 7: /* idiv */ |
449 |
break;
|
450 |
default:
|
451 |
goto illegal_op;
|
452 |
} |
453 |
break;
|
454 |
|
455 |
case 0xfe: /* GRP4 */ |
456 |
case 0xff: /* GRP5 */ |
457 |
if ((b & 1) == 0) |
458 |
ot = OT_BYTE; |
459 |
else
|
460 |
ot = dflag ? OT_LONG : OT_WORD; |
461 |
|
462 |
modrm = ldub_code(s->pc++); |
463 |
mod = (modrm >> 6) & 3; |
464 |
op = (modrm >> 3) & 7; |
465 |
if (op >= 2 && b == 0xfe) { |
466 |
goto illegal_op;
|
467 |
} |
468 |
pc_tmp = s->pc; |
469 |
parse_modrm(s, modrm); |
470 |
|
471 |
switch(op) {
|
472 |
case 0: /* inc Ev */ |
473 |
break;
|
474 |
case 1: /* dec Ev */ |
475 |
break;
|
476 |
case 2: /* call Ev */ |
477 |
/* XXX: optimize and handle MEM exceptions specifically
|
478 |
fs movl %eax, regs[0]
|
479 |
movl Ev, %eax
|
480 |
pushl next_eip
|
481 |
fs movl %eax, eip
|
482 |
*/
|
483 |
goto unsupported_op;
|
484 |
case 3: /* lcall Ev */ |
485 |
goto unsupported_op;
|
486 |
case 4: /* jmp Ev */ |
487 |
/* XXX: optimize and handle MEM exceptions specifically
|
488 |
fs movl %eax, regs[0]
|
489 |
movl Ev, %eax
|
490 |
fs movl %eax, eip
|
491 |
*/
|
492 |
goto unsupported_op;
|
493 |
case 5: /* ljmp Ev */ |
494 |
goto unsupported_op;
|
495 |
case 6: /* push Ev */ |
496 |
break;
|
497 |
default:
|
498 |
goto illegal_op;
|
499 |
} |
500 |
break;
|
501 |
case 0xa8: /* test eAX, Iv */ |
502 |
case 0xa9: |
503 |
if ((b & 1) == 0) |
504 |
ot = OT_BYTE; |
505 |
else
|
506 |
ot = dflag ? OT_LONG : OT_WORD; |
507 |
insn_get(s, ot); |
508 |
break;
|
509 |
|
510 |
case 0x98: /* CWDE/CBW */ |
511 |
break;
|
512 |
case 0x99: /* CDQ/CWD */ |
513 |
break;
|
514 |
case 0x1af: /* imul Gv, Ev */ |
515 |
case 0x69: /* imul Gv, Ev, I */ |
516 |
case 0x6b: |
517 |
ot = dflag ? OT_LONG : OT_WORD; |
518 |
modrm = ldub_code(s->pc++); |
519 |
parse_modrm(s, modrm); |
520 |
if (b == 0x69) { |
521 |
insn_get(s, ot); |
522 |
} else if (b == 0x6b) { |
523 |
insn_get(s, OT_BYTE); |
524 |
} else {
|
525 |
} |
526 |
break;
|
527 |
|
528 |
case 0x84: /* test Ev, Gv */ |
529 |
case 0x85: |
530 |
|
531 |
case 0x1c0: |
532 |
case 0x1c1: /* xadd Ev, Gv */ |
533 |
|
534 |
case 0x1b0: |
535 |
case 0x1b1: /* cmpxchg Ev, Gv */ |
536 |
|
537 |
case 0x8f: /* pop Ev */ |
538 |
|
539 |
case 0x88: |
540 |
case 0x89: /* mov Gv, Ev */ |
541 |
|
542 |
case 0x8a: |
543 |
case 0x8b: /* mov Ev, Gv */ |
544 |
|
545 |
case 0x1b6: /* movzbS Gv, Eb */ |
546 |
case 0x1b7: /* movzwS Gv, Eb */ |
547 |
case 0x1be: /* movsbS Gv, Eb */ |
548 |
case 0x1bf: /* movswS Gv, Eb */ |
549 |
|
550 |
case 0x86: |
551 |
case 0x87: /* xchg Ev, Gv */ |
552 |
|
553 |
case 0xd0: |
554 |
case 0xd1: /* shift Ev,1 */ |
555 |
|
556 |
case 0xd2: |
557 |
case 0xd3: /* shift Ev,cl */ |
558 |
|
559 |
case 0x1a5: /* shld cl */ |
560 |
case 0x1ad: /* shrd cl */ |
561 |
|
562 |
case 0x190 ... 0x19f: /* setcc Gv */ |
563 |
|
564 |
/* XXX: emulate cmov if not available ? */
|
565 |
case 0x140 ... 0x14f: /* cmov Gv, Ev */ |
566 |
|
567 |
case 0x1a3: /* bt Gv, Ev */ |
568 |
case 0x1ab: /* bts */ |
569 |
case 0x1b3: /* btr */ |
570 |
case 0x1bb: /* btc */ |
571 |
|
572 |
case 0x1bc: /* bsf */ |
573 |
case 0x1bd: /* bsr */ |
574 |
|
575 |
modrm = ldub_code(s->pc++); |
576 |
parse_modrm(s, modrm); |
577 |
break;
|
578 |
|
579 |
case 0x1c7: /* cmpxchg8b */ |
580 |
modrm = ldub_code(s->pc++); |
581 |
mod = (modrm >> 6) & 3; |
582 |
if (mod == 3) |
583 |
goto illegal_op;
|
584 |
parse_modrm(s, modrm); |
585 |
break;
|
586 |
|
587 |
/**************************/
|
588 |
/* push/pop */
|
589 |
case 0x50 ... 0x57: /* push */ |
590 |
case 0x58 ... 0x5f: /* pop */ |
591 |
case 0x60: /* pusha */ |
592 |
case 0x61: /* popa */ |
593 |
break;
|
594 |
|
595 |
case 0x68: /* push Iv */ |
596 |
case 0x6a: |
597 |
ot = dflag ? OT_LONG : OT_WORD; |
598 |
if (b == 0x68) |
599 |
insn_get(s, ot); |
600 |
else
|
601 |
insn_get(s, OT_BYTE); |
602 |
break;
|
603 |
case 0xc8: /* enter */ |
604 |
lduw_code(s->pc); |
605 |
s->pc += 2;
|
606 |
ldub_code(s->pc++); |
607 |
break;
|
608 |
case 0xc9: /* leave */ |
609 |
break;
|
610 |
|
611 |
case 0x06: /* push es */ |
612 |
case 0x0e: /* push cs */ |
613 |
case 0x16: /* push ss */ |
614 |
case 0x1e: /* push ds */ |
615 |
/* XXX: optimize:
|
616 |
push segs[n].selector
|
617 |
*/
|
618 |
goto unsupported_op;
|
619 |
case 0x1a0: /* push fs */ |
620 |
case 0x1a8: /* push gs */ |
621 |
goto unsupported_op;
|
622 |
case 0x07: /* pop es */ |
623 |
case 0x17: /* pop ss */ |
624 |
case 0x1f: /* pop ds */ |
625 |
goto unsupported_op;
|
626 |
case 0x1a1: /* pop fs */ |
627 |
case 0x1a9: /* pop gs */ |
628 |
goto unsupported_op;
|
629 |
case 0x8e: /* mov seg, Gv */ |
630 |
/* XXX: optimize:
|
631 |
fs movl r, regs[]
|
632 |
movl segs[].selector, r
|
633 |
mov r, Gv
|
634 |
fs movl regs[], r
|
635 |
*/
|
636 |
goto unsupported_op;
|
637 |
case 0x8c: /* mov Gv, seg */ |
638 |
goto unsupported_op;
|
639 |
case 0xc4: /* les Gv */ |
640 |
op = R_ES; |
641 |
goto do_lxx;
|
642 |
case 0xc5: /* lds Gv */ |
643 |
op = R_DS; |
644 |
goto do_lxx;
|
645 |
case 0x1b2: /* lss Gv */ |
646 |
op = R_SS; |
647 |
goto do_lxx;
|
648 |
case 0x1b4: /* lfs Gv */ |
649 |
op = R_FS; |
650 |
goto do_lxx;
|
651 |
case 0x1b5: /* lgs Gv */ |
652 |
op = R_GS; |
653 |
do_lxx:
|
654 |
goto unsupported_op;
|
655 |
/************************/
|
656 |
/* floats */
|
657 |
case 0xd8 ... 0xdf: |
658 |
#if 1 |
659 |
/* currently not stable enough */
|
660 |
goto unsupported_op;
|
661 |
#else
|
662 |
if (s->flags & (HF_EM_MASK | HF_TS_MASK))
|
663 |
goto unsupported_op;
|
664 |
#endif
|
665 |
#if 0
|
666 |
/* for testing FPU context switch */
|
667 |
{
|
668 |
static int count;
|
669 |
count = (count + 1) % 3;
|
670 |
if (count != 0)
|
671 |
goto unsupported_op;
|
672 |
}
|
673 |
#endif
|
674 |
modrm = ldub_code(s->pc++); |
675 |
mod = (modrm >> 6) & 3; |
676 |
rm = modrm & 7;
|
677 |
op = ((b & 7) << 3) | ((modrm >> 3) & 7); |
678 |
if (mod != 3) { |
679 |
/* memory op */
|
680 |
parse_modrm(s, modrm); |
681 |
switch(op) {
|
682 |
case 0x00 ... 0x07: /* fxxxs */ |
683 |
case 0x10 ... 0x17: /* fixxxl */ |
684 |
case 0x20 ... 0x27: /* fxxxl */ |
685 |
case 0x30 ... 0x37: /* fixxx */ |
686 |
break;
|
687 |
case 0x08: /* flds */ |
688 |
case 0x0a: /* fsts */ |
689 |
case 0x0b: /* fstps */ |
690 |
case 0x18: /* fildl */ |
691 |
case 0x1a: /* fistl */ |
692 |
case 0x1b: /* fistpl */ |
693 |
case 0x28: /* fldl */ |
694 |
case 0x2a: /* fstl */ |
695 |
case 0x2b: /* fstpl */ |
696 |
case 0x38: /* filds */ |
697 |
case 0x3a: /* fists */ |
698 |
case 0x3b: /* fistps */ |
699 |
case 0x0c: /* fldenv mem */ |
700 |
case 0x0d: /* fldcw mem */ |
701 |
case 0x0e: /* fnstenv mem */ |
702 |
case 0x0f: /* fnstcw mem */ |
703 |
case 0x1d: /* fldt mem */ |
704 |
case 0x1f: /* fstpt mem */ |
705 |
case 0x2c: /* frstor mem */ |
706 |
case 0x2e: /* fnsave mem */ |
707 |
case 0x2f: /* fnstsw mem */ |
708 |
case 0x3c: /* fbld */ |
709 |
case 0x3e: /* fbstp */ |
710 |
case 0x3d: /* fildll */ |
711 |
case 0x3f: /* fistpll */ |
712 |
break;
|
713 |
default:
|
714 |
goto illegal_op;
|
715 |
} |
716 |
} else {
|
717 |
/* register float ops */
|
718 |
switch(op) {
|
719 |
case 0x08: /* fld sti */ |
720 |
case 0x09: /* fxchg sti */ |
721 |
break;
|
722 |
case 0x0a: /* grp d9/2 */ |
723 |
switch(rm) {
|
724 |
case 0: /* fnop */ |
725 |
break;
|
726 |
default:
|
727 |
goto illegal_op;
|
728 |
} |
729 |
break;
|
730 |
case 0x0c: /* grp d9/4 */ |
731 |
switch(rm) {
|
732 |
case 0: /* fchs */ |
733 |
case 1: /* fabs */ |
734 |
case 4: /* ftst */ |
735 |
case 5: /* fxam */ |
736 |
break;
|
737 |
default:
|
738 |
goto illegal_op;
|
739 |
} |
740 |
break;
|
741 |
case 0x0d: /* grp d9/5 */ |
742 |
switch(rm) {
|
743 |
case 0: |
744 |
case 1: |
745 |
case 2: |
746 |
case 3: |
747 |
case 4: |
748 |
case 5: |
749 |
case 6: |
750 |
break;
|
751 |
default:
|
752 |
goto illegal_op;
|
753 |
} |
754 |
break;
|
755 |
case 0x0e: /* grp d9/6 */ |
756 |
break;
|
757 |
case 0x0f: /* grp d9/7 */ |
758 |
break;
|
759 |
case 0x00: case 0x01: case 0x04 ... 0x07: /* fxxx st, sti */ |
760 |
case 0x20: case 0x21: case 0x24 ... 0x27: /* fxxx sti, st */ |
761 |
case 0x30: case 0x31: case 0x34 ... 0x37: /* fxxxp sti, st */ |
762 |
break;
|
763 |
case 0x02: /* fcom */ |
764 |
break;
|
765 |
case 0x03: /* fcomp */ |
766 |
break;
|
767 |
case 0x15: /* da/5 */ |
768 |
switch(rm) {
|
769 |
case 1: /* fucompp */ |
770 |
break;
|
771 |
default:
|
772 |
goto illegal_op;
|
773 |
} |
774 |
break;
|
775 |
case 0x1c: |
776 |
switch(rm) {
|
777 |
case 0: /* feni (287 only, just do nop here) */ |
778 |
case 1: /* fdisi (287 only, just do nop here) */ |
779 |
goto unsupported_op;
|
780 |
case 2: /* fclex */ |
781 |
case 3: /* fninit */ |
782 |
case 4: /* fsetpm (287 only, just do nop here) */ |
783 |
break;
|
784 |
default:
|
785 |
goto illegal_op;
|
786 |
} |
787 |
break;
|
788 |
case 0x1d: /* fucomi */ |
789 |
break;
|
790 |
case 0x1e: /* fcomi */ |
791 |
break;
|
792 |
case 0x28: /* ffree sti */ |
793 |
break;
|
794 |
case 0x2a: /* fst sti */ |
795 |
break;
|
796 |
case 0x2b: /* fstp sti */ |
797 |
break;
|
798 |
case 0x2c: /* fucom st(i) */ |
799 |
break;
|
800 |
case 0x2d: /* fucomp st(i) */ |
801 |
break;
|
802 |
case 0x33: /* de/3 */ |
803 |
switch(rm) {
|
804 |
case 1: /* fcompp */ |
805 |
break;
|
806 |
default:
|
807 |
goto illegal_op;
|
808 |
} |
809 |
break;
|
810 |
case 0x3c: /* df/4 */ |
811 |
switch(rm) {
|
812 |
case 0: |
813 |
break;
|
814 |
default:
|
815 |
goto illegal_op;
|
816 |
} |
817 |
break;
|
818 |
case 0x3d: /* fucomip */ |
819 |
break;
|
820 |
case 0x3e: /* fcomip */ |
821 |
break;
|
822 |
case 0x10 ... 0x13: /* fcmovxx */ |
823 |
case 0x18 ... 0x1b: |
824 |
break;
|
825 |
default:
|
826 |
goto illegal_op;
|
827 |
} |
828 |
} |
829 |
s->tb->cflags |= CF_TB_FP_USED; |
830 |
break;
|
831 |
|
832 |
/**************************/
|
833 |
/* mov */
|
834 |
case 0xc6: |
835 |
case 0xc7: /* mov Ev, Iv */ |
836 |
if ((b & 1) == 0) |
837 |
ot = OT_BYTE; |
838 |
else
|
839 |
ot = dflag ? OT_LONG : OT_WORD; |
840 |
modrm = ldub_code(s->pc++); |
841 |
parse_modrm(s, modrm); |
842 |
insn_get(s, ot); |
843 |
break;
|
844 |
|
845 |
case 0x8d: /* lea */ |
846 |
ot = dflag ? OT_LONG : OT_WORD; |
847 |
modrm = ldub_code(s->pc++); |
848 |
mod = (modrm >> 6) & 3; |
849 |
if (mod == 3) |
850 |
goto illegal_op;
|
851 |
parse_modrm(s, modrm); |
852 |
break;
|
853 |
|
854 |
case 0xa0: /* mov EAX, Ov */ |
855 |
case 0xa1: |
856 |
case 0xa2: /* mov Ov, EAX */ |
857 |
case 0xa3: |
858 |
if ((b & 1) == 0) |
859 |
ot = OT_BYTE; |
860 |
else
|
861 |
ot = dflag ? OT_LONG : OT_WORD; |
862 |
if (s->aflag)
|
863 |
insn_get(s, OT_LONG); |
864 |
else
|
865 |
insn_get(s, OT_WORD); |
866 |
break;
|
867 |
case 0xd7: /* xlat */ |
868 |
break;
|
869 |
case 0xb0 ... 0xb7: /* mov R, Ib */ |
870 |
insn_get(s, OT_BYTE); |
871 |
break;
|
872 |
case 0xb8 ... 0xbf: /* mov R, Iv */ |
873 |
ot = dflag ? OT_LONG : OT_WORD; |
874 |
insn_get(s, ot); |
875 |
break;
|
876 |
|
877 |
case 0x91 ... 0x97: /* xchg R, EAX */ |
878 |
break;
|
879 |
|
880 |
/************************/
|
881 |
/* shifts */
|
882 |
case 0xc0: |
883 |
case 0xc1: /* shift Ev,imm */ |
884 |
|
885 |
case 0x1a4: /* shld imm */ |
886 |
case 0x1ac: /* shrd imm */ |
887 |
modrm = ldub_code(s->pc++); |
888 |
parse_modrm(s, modrm); |
889 |
ldub_code(s->pc++); |
890 |
break;
|
891 |
|
892 |
/************************/
|
893 |
/* string ops */
|
894 |
|
895 |
case 0xa4: /* movsS */ |
896 |
case 0xa5: |
897 |
break;
|
898 |
|
899 |
case 0xaa: /* stosS */ |
900 |
case 0xab: |
901 |
break;
|
902 |
|
903 |
case 0xac: /* lodsS */ |
904 |
case 0xad: |
905 |
break;
|
906 |
|
907 |
case 0xae: /* scasS */ |
908 |
case 0xaf: |
909 |
break;
|
910 |
|
911 |
case 0xa6: /* cmpsS */ |
912 |
case 0xa7: |
913 |
break;
|
914 |
|
915 |
case 0x6c: /* insS */ |
916 |
case 0x6d: |
917 |
goto unsupported_op;
|
918 |
|
919 |
case 0x6e: /* outsS */ |
920 |
case 0x6f: |
921 |
goto unsupported_op;
|
922 |
|
923 |
/************************/
|
924 |
/* port I/O */
|
925 |
case 0xe4: |
926 |
case 0xe5: |
927 |
goto unsupported_op;
|
928 |
|
929 |
case 0xe6: |
930 |
case 0xe7: |
931 |
goto unsupported_op;
|
932 |
|
933 |
case 0xec: |
934 |
case 0xed: |
935 |
goto unsupported_op;
|
936 |
|
937 |
case 0xee: |
938 |
case 0xef: |
939 |
goto unsupported_op;
|
940 |
|
941 |
/************************/
|
942 |
/* control */
|
943 |
#if 0
|
944 |
case 0xc2: /* ret im */
|
945 |
val = ldsw_code(s->pc);
|
946 |
s->pc += 2;
|
947 |
gen_pop_T0(s);
|
948 |
gen_stack_update(s, val + (2 << s->dflag));
|
949 |
if (s->dflag == 0)
|
950 |
gen_op_andl_T0_ffff();
|
951 |
gen_op_jmp_T0();
|
952 |
gen_eob(s);
|
953 |
break;
|
954 |
#endif
|
955 |
|
956 |
case 0xc3: /* ret */ |
957 |
gb(s, CPU_SEG); |
958 |
if (!s->dflag)
|
959 |
gb(s, 0x66); /* d16 */ |
960 |
gb(s, 0x8f); /* pop addr */ |
961 |
gb(s, 0x05);
|
962 |
gl(s, CPU_FIELD_OFFSET(eip)); |
963 |
if (!s->dflag) {
|
964 |
/* reset high bits of EIP */
|
965 |
gen_movw_addr_im(s, CPU_FIELD_OFFSET(eip) + 2, 0); |
966 |
} |
967 |
gen_eob(s); |
968 |
goto no_copy;
|
969 |
case 0xca: /* lret im */ |
970 |
case 0xcb: /* lret */ |
971 |
case 0xcf: /* iret */ |
972 |
case 0x9a: /* lcall im */ |
973 |
case 0xea: /* ljmp im */ |
974 |
goto unsupported_op;
|
975 |
|
976 |
case 0xe8: /* call im */ |
977 |
ot = dflag ? OT_LONG : OT_WORD; |
978 |
val = insn_get(s, ot); |
979 |
next_eip = s->pc - s->cs_base; |
980 |
val += next_eip; |
981 |
if (s->dflag) {
|
982 |
gb(s, 0x68); /* pushl imm */ |
983 |
gl(s, next_eip); |
984 |
} else {
|
985 |
gb(s, 0x66); /* pushw imm */ |
986 |
gb(s, 0x68);
|
987 |
gw(s, next_eip); |
988 |
val &= 0xffff;
|
989 |
} |
990 |
gen_jmp(s, val); |
991 |
goto no_copy;
|
992 |
case 0xe9: /* jmp */ |
993 |
ot = dflag ? OT_LONG : OT_WORD; |
994 |
val = insn_get(s, ot); |
995 |
val += s->pc - s->cs_base; |
996 |
if (s->dflag == 0) |
997 |
val = val & 0xffff;
|
998 |
gen_jmp(s, val); |
999 |
goto no_copy;
|
1000 |
case 0xeb: /* jmp Jb */ |
1001 |
val = (int8_t)insn_get(s, OT_BYTE); |
1002 |
val += s->pc - s->cs_base; |
1003 |
if (s->dflag == 0) |
1004 |
val = val & 0xffff;
|
1005 |
gen_jmp(s, val); |
1006 |
goto no_copy;
|
1007 |
case 0x70 ... 0x7f: /* jcc Jb */ |
1008 |
val = (int8_t)insn_get(s, OT_BYTE); |
1009 |
goto do_jcc;
|
1010 |
case 0x180 ... 0x18f: /* jcc Jv */ |
1011 |
if (dflag) {
|
1012 |
val = insn_get(s, OT_LONG); |
1013 |
} else {
|
1014 |
val = (int16_t)insn_get(s, OT_WORD); |
1015 |
} |
1016 |
do_jcc:
|
1017 |
next_eip = s->pc - s->cs_base; |
1018 |
val += next_eip; |
1019 |
if (s->dflag == 0) |
1020 |
val &= 0xffff;
|
1021 |
gen_jcc(s, b & 0xf, val, next_eip);
|
1022 |
goto no_copy;
|
1023 |
|
1024 |
/************************/
|
1025 |
/* flags */
|
1026 |
case 0x9c: /* pushf */ |
1027 |
/* XXX: put specific code ? */
|
1028 |
goto unsupported_op;
|
1029 |
case 0x9d: /* popf */ |
1030 |
goto unsupported_op;
|
1031 |
|
1032 |
case 0x9e: /* sahf */ |
1033 |
case 0x9f: /* lahf */ |
1034 |
case 0xf5: /* cmc */ |
1035 |
case 0xf8: /* clc */ |
1036 |
case 0xf9: /* stc */ |
1037 |
case 0xfc: /* cld */ |
1038 |
case 0xfd: /* std */ |
1039 |
break;
|
1040 |
|
1041 |
/************************/
|
1042 |
/* bit operations */
|
1043 |
case 0x1ba: /* bt/bts/btr/btc Gv, im */ |
1044 |
ot = dflag ? OT_LONG : OT_WORD; |
1045 |
modrm = ldub_code(s->pc++); |
1046 |
op = (modrm >> 3) & 7; |
1047 |
parse_modrm(s, modrm); |
1048 |
/* load shift */
|
1049 |
ldub_code(s->pc++); |
1050 |
if (op < 4) |
1051 |
goto illegal_op;
|
1052 |
break;
|
1053 |
/************************/
|
1054 |
/* bcd */
|
1055 |
case 0x27: /* daa */ |
1056 |
break;
|
1057 |
case 0x2f: /* das */ |
1058 |
break;
|
1059 |
case 0x37: /* aaa */ |
1060 |
break;
|
1061 |
case 0x3f: /* aas */ |
1062 |
break;
|
1063 |
case 0xd4: /* aam */ |
1064 |
ldub_code(s->pc++); |
1065 |
break;
|
1066 |
case 0xd5: /* aad */ |
1067 |
ldub_code(s->pc++); |
1068 |
break;
|
1069 |
/************************/
|
1070 |
/* misc */
|
1071 |
case 0x90: /* nop */ |
1072 |
break;
|
1073 |
case 0x9b: /* fwait */ |
1074 |
if ((s->flags & (HF_MP_MASK | HF_TS_MASK)) ==
|
1075 |
(HF_MP_MASK | HF_TS_MASK)) { |
1076 |
goto unsupported_op;
|
1077 |
} |
1078 |
break;
|
1079 |
case 0xcc: /* int3 */ |
1080 |
goto unsupported_op;
|
1081 |
case 0xcd: /* int N */ |
1082 |
goto unsupported_op;
|
1083 |
case 0xce: /* into */ |
1084 |
goto unsupported_op;
|
1085 |
case 0xf1: /* icebp (undocumented, exits to external debugger) */ |
1086 |
goto unsupported_op;
|
1087 |
case 0xfa: /* cli */ |
1088 |
goto unsupported_op;
|
1089 |
case 0xfb: /* sti */ |
1090 |
goto unsupported_op;
|
1091 |
case 0x62: /* bound */ |
1092 |
modrm = ldub_code(s->pc++); |
1093 |
mod = (modrm >> 6) & 3; |
1094 |
if (mod == 3) |
1095 |
goto illegal_op;
|
1096 |
parse_modrm(s, modrm); |
1097 |
break;
|
1098 |
case 0x1c8 ... 0x1cf: /* bswap reg */ |
1099 |
break;
|
1100 |
case 0xd6: /* salc */ |
1101 |
break;
|
1102 |
case 0xe0: /* loopnz */ |
1103 |
case 0xe1: /* loopz */ |
1104 |
case 0xe2: /* loop */ |
1105 |
case 0xe3: /* jecxz */ |
1106 |
goto unsupported_op;
|
1107 |
|
1108 |
case 0x130: /* wrmsr */ |
1109 |
case 0x132: /* rdmsr */ |
1110 |
goto unsupported_op;
|
1111 |
case 0x131: /* rdtsc */ |
1112 |
goto unsupported_op;
|
1113 |
case 0x1a2: /* cpuid */ |
1114 |
goto unsupported_op;
|
1115 |
case 0xf4: /* hlt */ |
1116 |
goto unsupported_op;
|
1117 |
case 0x100: |
1118 |
goto unsupported_op;
|
1119 |
case 0x101: |
1120 |
goto unsupported_op;
|
1121 |
case 0x108: /* invd */ |
1122 |
case 0x109: /* wbinvd */ |
1123 |
goto unsupported_op;
|
1124 |
case 0x63: /* arpl */ |
1125 |
goto unsupported_op;
|
1126 |
case 0x102: /* lar */ |
1127 |
case 0x103: /* lsl */ |
1128 |
goto unsupported_op;
|
1129 |
case 0x118: |
1130 |
goto unsupported_op;
|
1131 |
case 0x120: /* mov reg, crN */ |
1132 |
case 0x122: /* mov crN, reg */ |
1133 |
goto unsupported_op;
|
1134 |
case 0x121: /* mov reg, drN */ |
1135 |
case 0x123: /* mov drN, reg */ |
1136 |
goto unsupported_op;
|
1137 |
case 0x106: /* clts */ |
1138 |
goto unsupported_op;
|
1139 |
default:
|
1140 |
goto illegal_op;
|
1141 |
} |
1142 |
|
1143 |
/* just copy the code */
|
1144 |
|
1145 |
/* no override yet */
|
1146 |
if (!s->dflag)
|
1147 |
gb(s, 0x66);
|
1148 |
if (!s->aflag)
|
1149 |
gb(s, 0x67);
|
1150 |
if (prefixes & PREFIX_REPZ)
|
1151 |
gb(s, 0xf3);
|
1152 |
else if (prefixes & PREFIX_REPNZ) |
1153 |
gb(s, 0xf2);
|
1154 |
{ |
1155 |
int len, i;
|
1156 |
len = s->pc - pc_start_insn; |
1157 |
for(i = 0; i < len; i++) { |
1158 |
*s->gen_code_ptr++ = ldub_code(pc_start_insn + i); |
1159 |
} |
1160 |
} |
1161 |
no_copy:
|
1162 |
return 0; |
1163 |
illegal_op:
|
1164 |
unsupported_op:
|
1165 |
/* fall back to slower code gen necessary */
|
1166 |
s->pc = pc_start; |
1167 |
return -1; |
1168 |
} |
1169 |
|
1170 |
#define GEN_CODE_MAX_SIZE 8192 |
1171 |
#define GEN_CODE_MAX_INSN_SIZE 512 |
1172 |
|
1173 |
static inline int gen_intermediate_code_internal(CPUState *env, |
1174 |
TranslationBlock *tb, |
1175 |
uint8_t *gen_code_ptr, |
1176 |
int *gen_code_size_ptr,
|
1177 |
int search_pc,
|
1178 |
uint8_t *tc_ptr) |
1179 |
{ |
1180 |
DisasContext dc1, *dc = &dc1; |
1181 |
target_ulong pc_insn, pc_start, cs_base; |
1182 |
uint8_t *gen_code_end; |
1183 |
int flags, ret;
|
1184 |
|
1185 |
if (env->nb_breakpoints > 0 || |
1186 |
env->singlestep_enabled) |
1187 |
return -1; |
1188 |
flags = tb->flags; |
1189 |
if (flags & (HF_TF_MASK | HF_ADDSEG_MASK |
|
1190 |
HF_SOFTMMU_MASK | HF_INHIBIT_IRQ_MASK)) |
1191 |
return -1; |
1192 |
if (!(flags & HF_SS32_MASK))
|
1193 |
return -1; |
1194 |
if (tb->cflags & CF_SINGLE_INSN)
|
1195 |
return -1; |
1196 |
gen_code_end = gen_code_ptr + |
1197 |
GEN_CODE_MAX_SIZE - GEN_CODE_MAX_INSN_SIZE; |
1198 |
dc->gen_code_ptr = gen_code_ptr; |
1199 |
dc->gen_code_start = gen_code_ptr; |
1200 |
|
1201 |
/* generate intermediate code */
|
1202 |
pc_start = tb->pc; |
1203 |
cs_base = tb->cs_base; |
1204 |
dc->pc = pc_start; |
1205 |
dc->cs_base = cs_base; |
1206 |
dc->pe = (flags >> HF_PE_SHIFT) & 1;
|
1207 |
dc->code32 = (flags >> HF_CS32_SHIFT) & 1;
|
1208 |
dc->f_st = 0;
|
1209 |
dc->vm86 = (flags >> VM_SHIFT) & 1;
|
1210 |
dc->cpl = (flags >> HF_CPL_SHIFT) & 3;
|
1211 |
dc->iopl = (flags >> IOPL_SHIFT) & 3;
|
1212 |
dc->tb = tb; |
1213 |
dc->flags = flags; |
1214 |
|
1215 |
dc->is_jmp = 0;
|
1216 |
|
1217 |
for(;;) {
|
1218 |
pc_insn = dc->pc; |
1219 |
ret = disas_insn(dc); |
1220 |
if (ret < 0) { |
1221 |
/* unsupported insn */
|
1222 |
if (dc->pc == pc_start) {
|
1223 |
/* if first instruction, signal that no copying was done */
|
1224 |
return -1; |
1225 |
} else {
|
1226 |
gen_jmp(dc, dc->pc - dc->cs_base); |
1227 |
dc->is_jmp = 1;
|
1228 |
} |
1229 |
} |
1230 |
if (search_pc) {
|
1231 |
/* search pc mode */
|
1232 |
if (tc_ptr < dc->gen_code_ptr) {
|
1233 |
env->eip = pc_insn - cs_base; |
1234 |
return 0; |
1235 |
} |
1236 |
} |
1237 |
/* stop translation if indicated */
|
1238 |
if (dc->is_jmp)
|
1239 |
break;
|
1240 |
/* if too long translation, stop generation */
|
1241 |
if (dc->gen_code_ptr >= gen_code_end ||
|
1242 |
(dc->pc - pc_start) >= (TARGET_PAGE_SIZE - 32)) {
|
1243 |
gen_jmp(dc, dc->pc - dc->cs_base); |
1244 |
break;
|
1245 |
} |
1246 |
} |
1247 |
|
1248 |
#ifdef DEBUG_DISAS
|
1249 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
1250 |
fprintf(logfile, "----------------\n");
|
1251 |
fprintf(logfile, "IN: COPY: %s fpu=%d\n",
|
1252 |
lookup_symbol(pc_start), |
1253 |
tb->cflags & CF_TB_FP_USED ? 1 : 0); |
1254 |
target_disas(logfile, pc_start, dc->pc - pc_start, !dc->code32); |
1255 |
fprintf(logfile, "\n");
|
1256 |
} |
1257 |
#endif
|
1258 |
|
1259 |
if (!search_pc) {
|
1260 |
*gen_code_size_ptr = dc->gen_code_ptr - dc->gen_code_start; |
1261 |
tb->size = dc->pc - pc_start; |
1262 |
tb->cflags |= CF_CODE_COPY; |
1263 |
return 0; |
1264 |
} else {
|
1265 |
return -1; |
1266 |
} |
1267 |
} |
1268 |
|
1269 |
/* generate code by just copying data. Return -1 if cannot generate
|
1270 |
any code. Return 0 if code was generated */
|
1271 |
int cpu_gen_code_copy(CPUState *env, TranslationBlock *tb,
|
1272 |
int max_code_size, int *gen_code_size_ptr) |
1273 |
{ |
1274 |
/* generate machine code */
|
1275 |
tb->tb_next_offset[0] = 0xffff; |
1276 |
tb->tb_next_offset[1] = 0xffff; |
1277 |
#ifdef USE_DIRECT_JUMP
|
1278 |
/* the following two entries are optional (only used for string ops) */
|
1279 |
tb->tb_jmp_offset[2] = 0xffff; |
1280 |
tb->tb_jmp_offset[3] = 0xffff; |
1281 |
#endif
|
1282 |
return gen_intermediate_code_internal(env, tb,
|
1283 |
tb->tc_ptr, gen_code_size_ptr, |
1284 |
0, NULL); |
1285 |
} |
1286 |
|
1287 |
static uint8_t dummy_gen_code_buf[GEN_CODE_MAX_SIZE];
|
1288 |
|
1289 |
int cpu_restore_state_copy(TranslationBlock *tb,
|
1290 |
CPUState *env, unsigned long searched_pc, |
1291 |
void *puc)
|
1292 |
{ |
1293 |
struct ucontext *uc = puc;
|
1294 |
int ret, eflags;
|
1295 |
|
1296 |
/* find opc index corresponding to search_pc */
|
1297 |
if (searched_pc < (unsigned long)tb->tc_ptr) |
1298 |
return -1; |
1299 |
searched_pc = searched_pc - (long)tb->tc_ptr + (long)dummy_gen_code_buf; |
1300 |
ret = gen_intermediate_code_internal(env, tb, |
1301 |
dummy_gen_code_buf, NULL,
|
1302 |
1, (uint8_t *)searched_pc);
|
1303 |
if (ret < 0) |
1304 |
return ret;
|
1305 |
/* restore all the CPU state from the CPU context from the
|
1306 |
signal. The FPU context stays in the host CPU. */
|
1307 |
|
1308 |
env->regs[R_EAX] = uc->uc_mcontext.gregs[REG_EAX]; |
1309 |
env->regs[R_ECX] = uc->uc_mcontext.gregs[REG_ECX]; |
1310 |
env->regs[R_EDX] = uc->uc_mcontext.gregs[REG_EDX]; |
1311 |
env->regs[R_EBX] = uc->uc_mcontext.gregs[REG_EBX]; |
1312 |
env->regs[R_ESP] = uc->uc_mcontext.gregs[REG_ESP]; |
1313 |
env->regs[R_EBP] = uc->uc_mcontext.gregs[REG_EBP]; |
1314 |
env->regs[R_ESI] = uc->uc_mcontext.gregs[REG_ESI]; |
1315 |
env->regs[R_EDI] = uc->uc_mcontext.gregs[REG_EDI]; |
1316 |
eflags = uc->uc_mcontext.gregs[REG_EFL]; |
1317 |
env->df = 1 - (2 * ((eflags >> 10) & 1)); |
1318 |
env->cc_src = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
1319 |
env->cc_op = CC_OP_EFLAGS; |
1320 |
return 0; |
1321 |
} |
1322 |
|
1323 |
#endif /* USE_CODE_COPY */ |