+++ /dev/null
-/*
- * i386 on i386 translation
- *
- * 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 "config.h"
-
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <inttypes.h>
-#include <assert.h>
-
-#include "cpu.h"
-#include "exec-all.h"
-#include "disas.h"
-
-#ifdef USE_CODE_COPY
-
-#include <signal.h>
-#include <sys/mman.h>
-#include <sys/ucontext.h>
-
-extern char exec_loop;
-
-/* operand size */
-enum {
- OT_BYTE = 0,
- OT_WORD,
- OT_LONG,
- OT_QUAD,
-};
-
-#define PREFIX_REPZ 0x01
-#define PREFIX_REPNZ 0x02
-#define PREFIX_LOCK 0x04
-#define PREFIX_DATA 0x08
-#define PREFIX_ADR 0x10
-
-typedef struct DisasContext {
- /* current insn context */
- int override; /* -1 if no override */
- int prefix;
- int aflag, dflag;
- target_ulong pc; /* pc = eip + cs_base */
- int is_jmp; /* 1 = means jump (stop translation), 2 means CPU
- static state change (stop translation) */
- /* code output */
- uint8_t *gen_code_ptr;
- uint8_t *gen_code_start;
-
- /* current block context */
- target_ulong cs_base; /* base of CS segment */
- int pe; /* protected mode */
- int code32; /* 32 bit code segment */
- int f_st; /* currently unused */
- int vm86; /* vm86 mode */
- int cpl;
- int iopl;
- int flags;
- struct TranslationBlock *tb;
-} DisasContext;
-
-#define CPU_FIELD_OFFSET(field) offsetof(CPUState, field)
-
-#define CPU_SEG 0x64 /* fs override */
-
-static inline void gb(DisasContext *s, uint32_t val)
-{
- *s->gen_code_ptr++ = val;
-}
-
-static inline void gw(DisasContext *s, uint32_t val)
-{
- *s->gen_code_ptr++ = val;
- *s->gen_code_ptr++ = val >> 8;
-}
-
-static inline void gl(DisasContext *s, uint32_t val)
-{
- *s->gen_code_ptr++ = val;
- *s->gen_code_ptr++ = val >> 8;
- *s->gen_code_ptr++ = val >> 16;
- *s->gen_code_ptr++ = val >> 24;
-}
-
-static inline void gjmp(DisasContext *s, long val)
-{
- gb(s, 0xe9); /* jmp */
- gl(s, val - (long)(s->gen_code_ptr + 4));
-}
-
-static inline void gen_movl_addr_im(DisasContext *s,
- uint32_t addr, uint32_t val)
-{
- gb(s, CPU_SEG); /* seg movl im, addr */
- gb(s, 0xc7);
- gb(s, 0x05);
- gl(s, addr);
- gl(s, val);
-}
-
-static inline void gen_movw_addr_im(DisasContext *s,
- uint32_t addr, uint32_t val)
-{
- gb(s, CPU_SEG); /* seg movl im, addr */
- gb(s, 0x66);
- gb(s, 0xc7);
- gb(s, 0x05);
- gl(s, addr);
- gw(s, val);
-}
-
-
-static void gen_jmp(DisasContext *s, uint32_t target_eip)
-{
- TranslationBlock *tb = s->tb;
-
- gb(s, 0xe9); /* jmp */
- tb->tb_jmp_offset[0] = s->gen_code_ptr - s->gen_code_start;
- gl(s, 0);
-
- tb->tb_next_offset[0] = s->gen_code_ptr - s->gen_code_start;
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), target_eip);
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb);
- gjmp(s, (long)&exec_loop);
-
- s->is_jmp = 1;
-}
-
-static void gen_jcc(DisasContext *s, int op,
- uint32_t target_eip, uint32_t next_eip)
-{
- TranslationBlock *tb = s->tb;
-
- gb(s, 0x0f); /* jcc */
- gb(s, 0x80 + op);
- tb->tb_jmp_offset[0] = s->gen_code_ptr - s->gen_code_start;
- gl(s, 0);
- gb(s, 0xe9); /* jmp */
- tb->tb_jmp_offset[1] = s->gen_code_ptr - s->gen_code_start;
- gl(s, 0);
-
- tb->tb_next_offset[0] = s->gen_code_ptr - s->gen_code_start;
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), target_eip);
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb);
- gjmp(s, (long)&exec_loop);
-
- tb->tb_next_offset[1] = s->gen_code_ptr - s->gen_code_start;
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(eip), next_eip);
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), (uint32_t)tb | 1);
- gjmp(s, (long)&exec_loop);
-
- s->is_jmp = 1;
-}
-
-static void gen_eob(DisasContext *s)
-{
- gen_movl_addr_im(s, CPU_FIELD_OFFSET(tmp0), 0);
- gjmp(s, (long)&exec_loop);
-
- s->is_jmp = 1;
-}
-
-static inline void gen_lea_modrm(DisasContext *s, int modrm)
-{
- int havesib;
- int base, disp;
- int index;
- int scale;
- int mod, rm, code;
-
- mod = (modrm >> 6) & 3;
- rm = modrm & 7;
-
- if (s->aflag) {
-
- havesib = 0;
- base = rm;
- index = 0;
- scale = 0;
-
- if (base == 4) {
- havesib = 1;
- code = ldub_code(s->pc++);
- scale = (code >> 6) & 3;
- index = (code >> 3) & 7;
- base = code & 7;
- }
-
- switch (mod) {
- case 0:
- if (base == 5) {
- base = -1;
- disp = ldl_code(s->pc);
- s->pc += 4;
- } else {
- disp = 0;
- }
- break;
- case 1:
- disp = (int8_t)ldub_code(s->pc++);
- break;
- default:
- case 2:
- disp = ldl_code(s->pc);
- s->pc += 4;
- break;
- }
-
- } else {
- switch (mod) {
- case 0:
- if (rm == 6) {
- disp = lduw_code(s->pc);
- s->pc += 2;
- } else {
- disp = 0;
- }
- break;
- case 1:
- disp = (int8_t)ldub_code(s->pc++);
- break;
- default:
- case 2:
- disp = lduw_code(s->pc);
- s->pc += 2;
- break;
- }
- }
-}
-
-static inline void parse_modrm(DisasContext *s, int modrm)
-{
- if ((modrm & 0xc0) != 0xc0)
- gen_lea_modrm(s, modrm);
-}
-
-static inline uint32_t insn_get(DisasContext *s, int ot)
-{
- uint32_t ret;
-
- switch(ot) {
- case OT_BYTE:
- ret = ldub_code(s->pc);
- s->pc++;
- break;
- case OT_WORD:
- ret = lduw_code(s->pc);
- s->pc += 2;
- break;
- default:
- case OT_LONG:
- ret = ldl_code(s->pc);
- s->pc += 4;
- break;
- }
- return ret;
-}
-
-/* convert one instruction. s->is_jmp is set if the translation must
- be stopped. */
-static int disas_insn(DisasContext *s)
-{
- target_ulong pc_start, pc_tmp, pc_start_insn;
- int b, prefixes, aflag, dflag, next_eip, val;
- int ot;
- int modrm, mod, op, rm;
-
- pc_start = s->pc;
- prefixes = 0;
- aflag = s->code32;
- dflag = s->code32;
- s->override = -1;
- next_byte:
- b = ldub_code(s->pc);
- s->pc++;
- /* check prefixes */
- switch (b) {
- case 0xf3:
- prefixes |= PREFIX_REPZ;
- goto next_byte;
- case 0xf2:
- prefixes |= PREFIX_REPNZ;
- goto next_byte;
- case 0xf0:
- prefixes |= PREFIX_LOCK;
- goto next_byte;
- case 0x2e:
- s->override = R_CS;
- goto next_byte;
- case 0x36:
- s->override = R_SS;
- goto next_byte;
- case 0x3e:
- s->override = R_DS;
- goto next_byte;
- case 0x26:
- s->override = R_ES;
- goto next_byte;
- case 0x64:
- s->override = R_FS;
- goto next_byte;
- case 0x65:
- s->override = R_GS;
- goto next_byte;
- case 0x66:
- prefixes |= PREFIX_DATA;
- goto next_byte;
- case 0x67:
- prefixes |= PREFIX_ADR;
- goto next_byte;
- }
-
- if (prefixes & PREFIX_DATA)
- dflag ^= 1;
- if (prefixes & PREFIX_ADR)
- aflag ^= 1;
-
- s->prefix = prefixes;
- s->aflag = aflag;
- s->dflag = dflag;
-
- /* lock generation */
- if (prefixes & PREFIX_LOCK)
- goto unsupported_op;
- if (s->override == R_FS || s->override == R_GS || s->override == R_CS)
- goto unsupported_op;
-
- pc_start_insn = s->pc - 1;
- /* now check op code */
- reswitch:
- switch(b) {
- case 0x0f:
- /**************************/
- /* extended op code */
- b = ldub_code(s->pc++) | 0x100;
- goto reswitch;
-
- /**************************/
- /* arith & logic */
- case 0x00 ... 0x05:
- case 0x08 ... 0x0d:
- case 0x10 ... 0x15:
- case 0x18 ... 0x1d:
- case 0x20 ... 0x25:
- case 0x28 ... 0x2d:
- case 0x30 ... 0x35:
- case 0x38 ... 0x3d:
- {
- int f;
- f = (b >> 1) & 3;
-
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
-
- switch(f) {
- case 0: /* OP Ev, Gv */
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- break;
- case 1: /* OP Gv, Ev */
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- break;
- case 2: /* OP A, Iv */
- insn_get(s, ot);
- break;
- }
- }
- break;
-
- case 0x80: /* GRP1 */
- case 0x81:
- case 0x82:
- case 0x83:
- {
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
-
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
-
- switch(b) {
- default:
- case 0x80:
- case 0x81:
- case 0x82:
- insn_get(s, ot);
- break;
- case 0x83:
- insn_get(s, OT_BYTE);
- break;
- }
- }
- break;
-
- /**************************/
- /* inc, dec, and other misc arith */
- case 0x40 ... 0x47: /* inc Gv */
- break;
- case 0x48 ... 0x4f: /* dec Gv */
- break;
- case 0xf6: /* GRP3 */
- case 0xf7:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
-
- modrm = ldub_code(s->pc++);
- op = (modrm >> 3) & 7;
- parse_modrm(s, modrm);
-
- switch(op) {
- case 0: /* test */
- insn_get(s, ot);
- break;
- case 2: /* not */
- break;
- case 3: /* neg */
- break;
- case 4: /* mul */
- break;
- case 5: /* imul */
- break;
- case 6: /* div */
- break;
- case 7: /* idiv */
- break;
- default:
- goto illegal_op;
- }
- break;
-
- case 0xfe: /* GRP4 */
- case 0xff: /* GRP5 */
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
-
- modrm = ldub_code(s->pc++);
- mod = (modrm >> 6) & 3;
- op = (modrm >> 3) & 7;
- if (op >= 2 && b == 0xfe) {
- goto illegal_op;
- }
- pc_tmp = s->pc;
- parse_modrm(s, modrm);
-
- switch(op) {
- case 0: /* inc Ev */
- break;
- case 1: /* dec Ev */
- break;
- case 2: /* call Ev */
- /* XXX: optimize and handle MEM exceptions specifically
- fs movl %eax, regs[0]
- movl Ev, %eax
- pushl next_eip
- fs movl %eax, eip
- */
- goto unsupported_op;
- case 3: /* lcall Ev */
- goto unsupported_op;
- case 4: /* jmp Ev */
- /* XXX: optimize and handle MEM exceptions specifically
- fs movl %eax, regs[0]
- movl Ev, %eax
- fs movl %eax, eip
- */
- goto unsupported_op;
- case 5: /* ljmp Ev */
- goto unsupported_op;
- case 6: /* push Ev */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0xa8: /* test eAX, Iv */
- case 0xa9:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- insn_get(s, ot);
- break;
-
- case 0x98: /* CWDE/CBW */
- break;
- case 0x99: /* CDQ/CWD */
- break;
- case 0x1af: /* imul Gv, Ev */
- case 0x69: /* imul Gv, Ev, I */
- case 0x6b:
- ot = dflag ? OT_LONG : OT_WORD;
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- if (b == 0x69) {
- insn_get(s, ot);
- } else if (b == 0x6b) {
- insn_get(s, OT_BYTE);
- } else {
- }
- break;
-
- case 0x84: /* test Ev, Gv */
- case 0x85:
-
- case 0x1c0:
- case 0x1c1: /* xadd Ev, Gv */
-
- case 0x1b0:
- case 0x1b1: /* cmpxchg Ev, Gv */
-
- case 0x8f: /* pop Ev */
-
- case 0x88:
- case 0x89: /* mov Gv, Ev */
-
- case 0x8a:
- case 0x8b: /* mov Ev, Gv */
-
- case 0x1b6: /* movzbS Gv, Eb */
- case 0x1b7: /* movzwS Gv, Eb */
- case 0x1be: /* movsbS Gv, Eb */
- case 0x1bf: /* movswS Gv, Eb */
-
- case 0x86:
- case 0x87: /* xchg Ev, Gv */
-
- case 0xd0:
- case 0xd1: /* shift Ev,1 */
-
- case 0xd2:
- case 0xd3: /* shift Ev,cl */
-
- case 0x1a5: /* shld cl */
- case 0x1ad: /* shrd cl */
-
- case 0x190 ... 0x19f: /* setcc Gv */
-
- /* XXX: emulate cmov if not available ? */
- case 0x140 ... 0x14f: /* cmov Gv, Ev */
-
- case 0x1a3: /* bt Gv, Ev */
- case 0x1ab: /* bts */
- case 0x1b3: /* btr */
- case 0x1bb: /* btc */
-
- case 0x1bc: /* bsf */
- case 0x1bd: /* bsr */
-
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- break;
-
- case 0x1c7: /* cmpxchg8b */
- modrm = ldub_code(s->pc++);
- mod = (modrm >> 6) & 3;
- if (mod == 3)
- goto illegal_op;
- parse_modrm(s, modrm);
- break;
-
- /**************************/
- /* push/pop */
- case 0x50 ... 0x57: /* push */
- case 0x58 ... 0x5f: /* pop */
- case 0x60: /* pusha */
- case 0x61: /* popa */
- break;
-
- case 0x68: /* push Iv */
- case 0x6a:
- ot = dflag ? OT_LONG : OT_WORD;
- if (b == 0x68)
- insn_get(s, ot);
- else
- insn_get(s, OT_BYTE);
- break;
- case 0xc8: /* enter */
- lduw_code(s->pc);
- s->pc += 2;
- ldub_code(s->pc++);
- break;
- case 0xc9: /* leave */
- break;
-
- case 0x06: /* push es */
- case 0x0e: /* push cs */
- case 0x16: /* push ss */
- case 0x1e: /* push ds */
- /* XXX: optimize:
- push segs[n].selector
- */
- goto unsupported_op;
- case 0x1a0: /* push fs */
- case 0x1a8: /* push gs */
- goto unsupported_op;
- case 0x07: /* pop es */
- case 0x17: /* pop ss */
- case 0x1f: /* pop ds */
- goto unsupported_op;
- case 0x1a1: /* pop fs */
- case 0x1a9: /* pop gs */
- goto unsupported_op;
- case 0x8e: /* mov seg, Gv */
- /* XXX: optimize:
- fs movl r, regs[]
- movl segs[].selector, r
- mov r, Gv
- fs movl regs[], r
- */
- goto unsupported_op;
- case 0x8c: /* mov Gv, seg */
- goto unsupported_op;
- case 0xc4: /* les Gv */
- op = R_ES;
- goto do_lxx;
- case 0xc5: /* lds Gv */
- op = R_DS;
- goto do_lxx;
- case 0x1b2: /* lss Gv */
- op = R_SS;
- goto do_lxx;
- case 0x1b4: /* lfs Gv */
- op = R_FS;
- goto do_lxx;
- case 0x1b5: /* lgs Gv */
- op = R_GS;
- do_lxx:
- goto unsupported_op;
- /************************/
- /* floats */
- case 0xd8 ... 0xdf:
-#if 1
- /* currently not stable enough */
- goto unsupported_op;
-#else
- if (s->flags & (HF_EM_MASK | HF_TS_MASK))
- goto unsupported_op;
-#endif
-#if 0
- /* for testing FPU context switch */
- {
- static int count;
- count = (count + 1) % 3;
- if (count != 0)
- goto unsupported_op;
- }
-#endif
- modrm = ldub_code(s->pc++);
- mod = (modrm >> 6) & 3;
- rm = modrm & 7;
- op = ((b & 7) << 3) | ((modrm >> 3) & 7);
- if (mod != 3) {
- /* memory op */
- parse_modrm(s, modrm);
- switch(op) {
- case 0x00 ... 0x07: /* fxxxs */
- case 0x10 ... 0x17: /* fixxxl */
- case 0x20 ... 0x27: /* fxxxl */
- case 0x30 ... 0x37: /* fixxx */
- break;
- case 0x08: /* flds */
- case 0x0a: /* fsts */
- case 0x0b: /* fstps */
- case 0x18: /* fildl */
- case 0x1a: /* fistl */
- case 0x1b: /* fistpl */
- case 0x28: /* fldl */
- case 0x2a: /* fstl */
- case 0x2b: /* fstpl */
- case 0x38: /* filds */
- case 0x3a: /* fists */
- case 0x3b: /* fistps */
- case 0x0c: /* fldenv mem */
- case 0x0d: /* fldcw mem */
- case 0x0e: /* fnstenv mem */
- case 0x0f: /* fnstcw mem */
- case 0x1d: /* fldt mem */
- case 0x1f: /* fstpt mem */
- case 0x2c: /* frstor mem */
- case 0x2e: /* fnsave mem */
- case 0x2f: /* fnstsw mem */
- case 0x3c: /* fbld */
- case 0x3e: /* fbstp */
- case 0x3d: /* fildll */
- case 0x3f: /* fistpll */
- break;
- default:
- goto illegal_op;
- }
- } else {
- /* register float ops */
- switch(op) {
- case 0x08: /* fld sti */
- case 0x09: /* fxchg sti */
- break;
- case 0x0a: /* grp d9/2 */
- switch(rm) {
- case 0: /* fnop */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x0c: /* grp d9/4 */
- switch(rm) {
- case 0: /* fchs */
- case 1: /* fabs */
- case 4: /* ftst */
- case 5: /* fxam */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x0d: /* grp d9/5 */
- switch(rm) {
- case 0:
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- case 6:
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x0e: /* grp d9/6 */
- break;
- case 0x0f: /* grp d9/7 */
- break;
- case 0x00: case 0x01: case 0x04 ... 0x07: /* fxxx st, sti */
- case 0x20: case 0x21: case 0x24 ... 0x27: /* fxxx sti, st */
- case 0x30: case 0x31: case 0x34 ... 0x37: /* fxxxp sti, st */
- break;
- case 0x02: /* fcom */
- break;
- case 0x03: /* fcomp */
- break;
- case 0x15: /* da/5 */
- switch(rm) {
- case 1: /* fucompp */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x1c:
- switch(rm) {
- case 0: /* feni (287 only, just do nop here) */
- case 1: /* fdisi (287 only, just do nop here) */
- goto unsupported_op;
- case 2: /* fclex */
- case 3: /* fninit */
- case 4: /* fsetpm (287 only, just do nop here) */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x1d: /* fucomi */
- break;
- case 0x1e: /* fcomi */
- break;
- case 0x28: /* ffree sti */
- break;
- case 0x2a: /* fst sti */
- break;
- case 0x2b: /* fstp sti */
- break;
- case 0x2c: /* fucom st(i) */
- break;
- case 0x2d: /* fucomp st(i) */
- break;
- case 0x33: /* de/3 */
- switch(rm) {
- case 1: /* fcompp */
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x3c: /* df/4 */
- switch(rm) {
- case 0:
- break;
- default:
- goto illegal_op;
- }
- break;
- case 0x3d: /* fucomip */
- break;
- case 0x3e: /* fcomip */
- break;
- case 0x10 ... 0x13: /* fcmovxx */
- case 0x18 ... 0x1b:
- break;
- default:
- goto illegal_op;
- }
- }
- s->tb->cflags |= CF_TB_FP_USED;
- break;
-
- /**************************/
- /* mov */
- case 0xc6:
- case 0xc7: /* mov Ev, Iv */
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- insn_get(s, ot);
- break;
-
- case 0x8d: /* lea */
- ot = dflag ? OT_LONG : OT_WORD;
- modrm = ldub_code(s->pc++);
- mod = (modrm >> 6) & 3;
- if (mod == 3)
- goto illegal_op;
- parse_modrm(s, modrm);
- break;
-
- case 0xa0: /* mov EAX, Ov */
- case 0xa1:
- case 0xa2: /* mov Ov, EAX */
- case 0xa3:
- if ((b & 1) == 0)
- ot = OT_BYTE;
- else
- ot = dflag ? OT_LONG : OT_WORD;
- if (s->aflag)
- insn_get(s, OT_LONG);
- else
- insn_get(s, OT_WORD);
- break;
- case 0xd7: /* xlat */
- break;
- case 0xb0 ... 0xb7: /* mov R, Ib */
- insn_get(s, OT_BYTE);
- break;
- case 0xb8 ... 0xbf: /* mov R, Iv */
- ot = dflag ? OT_LONG : OT_WORD;
- insn_get(s, ot);
- break;
-
- case 0x91 ... 0x97: /* xchg R, EAX */
- break;
-
- /************************/
- /* shifts */
- case 0xc0:
- case 0xc1: /* shift Ev,imm */
-
- case 0x1a4: /* shld imm */
- case 0x1ac: /* shrd imm */
- modrm = ldub_code(s->pc++);
- parse_modrm(s, modrm);
- ldub_code(s->pc++);
- break;
-
- /************************/
- /* string ops */
-
- case 0xa4: /* movsS */
- case 0xa5:
- break;
-
- case 0xaa: /* stosS */
- case 0xab:
- break;
-
- case 0xac: /* lodsS */
- case 0xad:
- break;
-
- case 0xae: /* scasS */
- case 0xaf:
- break;
-
- case 0xa6: /* cmpsS */
- case 0xa7:
- break;
-
- case 0x6c: /* insS */
- case 0x6d:
- goto unsupported_op;
-
- case 0x6e: /* outsS */
- case 0x6f:
- goto unsupported_op;
-
- /************************/
- /* port I/O */
- case 0xe4:
- case 0xe5:
- goto unsupported_op;
-
- case 0xe6:
- case 0xe7:
- goto unsupported_op;
-
- case 0xec:
- case 0xed:
- goto unsupported_op;
-
- case 0xee:
- case 0xef:
- goto unsupported_op;
-
- /************************/
- /* control */
-#if 0
- case 0xc2: /* ret im */
- val = ldsw_code(s->pc);
- s->pc += 2;
- gen_pop_T0(s);
- gen_stack_update(s, val + (2 << s->dflag));
- if (s->dflag == 0)
- gen_op_andl_T0_ffff();
- gen_op_jmp_T0();
- gen_eob(s);
- break;
-#endif
-
- case 0xc3: /* ret */
- gb(s, CPU_SEG);
- if (!s->dflag)
- gb(s, 0x66); /* d16 */
- gb(s, 0x8f); /* pop addr */
- gb(s, 0x05);
- gl(s, CPU_FIELD_OFFSET(eip));
- if (!s->dflag) {
- /* reset high bits of EIP */
- gen_movw_addr_im(s, CPU_FIELD_OFFSET(eip) + 2, 0);
- }
- gen_eob(s);
- goto no_copy;
- case 0xca: /* lret im */
- case 0xcb: /* lret */
- case 0xcf: /* iret */
- case 0x9a: /* lcall im */
- case 0xea: /* ljmp im */
- goto unsupported_op;
-
- case 0xe8: /* call im */
- ot = dflag ? OT_LONG : OT_WORD;
- val = insn_get(s, ot);
- next_eip = s->pc - s->cs_base;
- val += next_eip;
- if (s->dflag) {
- gb(s, 0x68); /* pushl imm */
- gl(s, next_eip);
- } else {
- gb(s, 0x66); /* pushw imm */
- gb(s, 0x68);
- gw(s, next_eip);
- val &= 0xffff;
- }
- gen_jmp(s, val);
- goto no_copy;
- case 0xe9: /* jmp */
- ot = dflag ? OT_LONG : OT_WORD;
- val = insn_get(s, ot);
- val += s->pc - s->cs_base;
- if (s->dflag == 0)
- val = val & 0xffff;
- gen_jmp(s, val);
- goto no_copy;
- case 0xeb: /* jmp Jb */
- val = (int8_t)insn_get(s, OT_BYTE);
- val += s->pc - s->cs_base;
- if (s->dflag == 0)
- val = val & 0xffff;
- gen_jmp(s, val);
- goto no_copy;
- case 0x70 ... 0x7f: /* jcc Jb */
- val = (int8_t)insn_get(s, OT_BYTE);
- goto do_jcc;
- case 0x180 ... 0x18f: /* jcc Jv */
- if (dflag) {
- val = insn_get(s, OT_LONG);
- } else {
- val = (int16_t)insn_get(s, OT_WORD);
- }
- do_jcc:
- next_eip = s->pc - s->cs_base;
- val += next_eip;
- if (s->dflag == 0)
- val &= 0xffff;
- gen_jcc(s, b & 0xf, val, next_eip);
- goto no_copy;
-
- /************************/
- /* flags */
- case 0x9c: /* pushf */
- /* XXX: put specific code ? */
- goto unsupported_op;
- case 0x9d: /* popf */
- goto unsupported_op;
-
- case 0x9e: /* sahf */
- case 0x9f: /* lahf */
- case 0xf5: /* cmc */
- case 0xf8: /* clc */
- case 0xf9: /* stc */
- case 0xfc: /* cld */
- case 0xfd: /* std */
- break;
-
- /************************/
- /* bit operations */
- case 0x1ba: /* bt/bts/btr/btc Gv, im */
- ot = dflag ? OT_LONG : OT_WORD;
- modrm = ldub_code(s->pc++);
- op = (modrm >> 3) & 7;
- parse_modrm(s, modrm);
- /* load shift */
- ldub_code(s->pc++);
- if (op < 4)
- goto illegal_op;
- break;
- /************************/
- /* bcd */
- case 0x27: /* daa */
- break;
- case 0x2f: /* das */
- break;
- case 0x37: /* aaa */
- break;
- case 0x3f: /* aas */
- break;
- case 0xd4: /* aam */
- ldub_code(s->pc++);
- break;
- case 0xd5: /* aad */
- ldub_code(s->pc++);
- break;
- /************************/
- /* misc */
- case 0x90: /* nop */
- break;
- case 0x9b: /* fwait */
- if ((s->flags & (HF_MP_MASK | HF_TS_MASK)) ==
- (HF_MP_MASK | HF_TS_MASK)) {
- goto unsupported_op;
- }
- break;
- case 0xcc: /* int3 */
- goto unsupported_op;
- case 0xcd: /* int N */
- goto unsupported_op;
- case 0xce: /* into */
- goto unsupported_op;
- case 0xf1: /* icebp (undocumented, exits to external debugger) */
- goto unsupported_op;
- case 0xfa: /* cli */
- goto unsupported_op;
- case 0xfb: /* sti */
- goto unsupported_op;
- case 0x62: /* bound */
- modrm = ldub_code(s->pc++);
- mod = (modrm >> 6) & 3;
- if (mod == 3)
- goto illegal_op;
- parse_modrm(s, modrm);
- break;
- case 0x1c8 ... 0x1cf: /* bswap reg */
- break;
- case 0xd6: /* salc */
- break;
- case 0xe0: /* loopnz */
- case 0xe1: /* loopz */
- case 0xe2: /* loop */
- case 0xe3: /* jecxz */
- goto unsupported_op;
-
- case 0x130: /* wrmsr */
- case 0x132: /* rdmsr */
- goto unsupported_op;
- case 0x131: /* rdtsc */
- goto unsupported_op;
- case 0x1a2: /* cpuid */
- goto unsupported_op;
- case 0xf4: /* hlt */
- goto unsupported_op;
- case 0x100:
- goto unsupported_op;
- case 0x101:
- goto unsupported_op;
- case 0x108: /* invd */
- case 0x109: /* wbinvd */
- goto unsupported_op;
- case 0x63: /* arpl */
- goto unsupported_op;
- case 0x102: /* lar */
- case 0x103: /* lsl */
- goto unsupported_op;
- case 0x118:
- goto unsupported_op;
- case 0x120: /* mov reg, crN */
- case 0x122: /* mov crN, reg */
- goto unsupported_op;
- case 0x121: /* mov reg, drN */
- case 0x123: /* mov drN, reg */
- goto unsupported_op;
- case 0x106: /* clts */
- goto unsupported_op;
- default:
- goto illegal_op;
- }
-
- /* just copy the code */
-
- /* no override yet */
- if (!s->dflag)
- gb(s, 0x66);
- if (!s->aflag)
- gb(s, 0x67);
- if (prefixes & PREFIX_REPZ)
- gb(s, 0xf3);
- else if (prefixes & PREFIX_REPNZ)
- gb(s, 0xf2);
- {
- int len, i;
- len = s->pc - pc_start_insn;
- for(i = 0; i < len; i++) {
- *s->gen_code_ptr++ = ldub_code(pc_start_insn + i);
- }
- }
- no_copy:
- return 0;
- illegal_op:
- unsupported_op:
- /* fall back to slower code gen necessary */
- s->pc = pc_start;
- return -1;
-}
-
-#define GEN_CODE_MAX_SIZE 8192
-#define GEN_CODE_MAX_INSN_SIZE 512
-
-static inline int gen_intermediate_code_internal(CPUState *env,
- TranslationBlock *tb,
- uint8_t *gen_code_ptr,
- int *gen_code_size_ptr,
- int search_pc,
- uint8_t *tc_ptr)
-{
- DisasContext dc1, *dc = &dc1;
- target_ulong pc_insn, pc_start, cs_base;
- uint8_t *gen_code_end;
- int flags, ret;
-
- if (env->nb_breakpoints > 0 ||
- env->singlestep_enabled)
- return -1;
- flags = tb->flags;
- if (flags & (HF_TF_MASK | HF_ADDSEG_MASK |
- HF_SOFTMMU_MASK | HF_INHIBIT_IRQ_MASK))
- return -1;
- if (!(flags & HF_SS32_MASK))
- return -1;
- if (tb->cflags & CF_SINGLE_INSN)
- return -1;
- gen_code_end = gen_code_ptr +
- GEN_CODE_MAX_SIZE - GEN_CODE_MAX_INSN_SIZE;
- dc->gen_code_ptr = gen_code_ptr;
- dc->gen_code_start = gen_code_ptr;
-
- /* generate intermediate code */
- pc_start = tb->pc;
- cs_base = tb->cs_base;
- dc->pc = pc_start;
- dc->cs_base = cs_base;
- dc->pe = (flags >> HF_PE_SHIFT) & 1;
- dc->code32 = (flags >> HF_CS32_SHIFT) & 1;
- dc->f_st = 0;
- dc->vm86 = (flags >> VM_SHIFT) & 1;
- dc->cpl = (flags >> HF_CPL_SHIFT) & 3;
- dc->iopl = (flags >> IOPL_SHIFT) & 3;
- dc->tb = tb;
- dc->flags = flags;
-
- dc->is_jmp = 0;
-
- for(;;) {
- pc_insn = dc->pc;
- ret = disas_insn(dc);
- if (ret < 0) {
- /* unsupported insn */
- if (dc->pc == pc_start) {
- /* if first instruction, signal that no copying was done */
- return -1;
- } else {
- gen_jmp(dc, dc->pc - dc->cs_base);
- dc->is_jmp = 1;
- }
- }
- if (search_pc) {
- /* search pc mode */
- if (tc_ptr < dc->gen_code_ptr) {
- env->eip = pc_insn - cs_base;
- return 0;
- }
- }
- /* stop translation if indicated */
- if (dc->is_jmp)
- break;
- /* if too long translation, stop generation */
- if (dc->gen_code_ptr >= gen_code_end ||
- (dc->pc - pc_start) >= (TARGET_PAGE_SIZE - 32)) {
- gen_jmp(dc, dc->pc - dc->cs_base);
- break;
- }
- }
-
-#ifdef DEBUG_DISAS
- if (loglevel & CPU_LOG_TB_IN_ASM) {
- fprintf(logfile, "----------------\n");
- fprintf(logfile, "IN: COPY: %s fpu=%d\n",
- lookup_symbol(pc_start),
- tb->cflags & CF_TB_FP_USED ? 1 : 0);
- target_disas(logfile, pc_start, dc->pc - pc_start, !dc->code32);
- fprintf(logfile, "\n");
- }
-#endif
-
- if (!search_pc) {
- *gen_code_size_ptr = dc->gen_code_ptr - dc->gen_code_start;
- tb->size = dc->pc - pc_start;
- tb->cflags |= CF_CODE_COPY;
- return 0;
- } else {
- return -1;
- }
-}
-
-/* generate code by just copying data. Return -1 if cannot generate
- any code. Return 0 if code was generated */
-int cpu_gen_code_copy(CPUState *env, TranslationBlock *tb,
- int max_code_size, int *gen_code_size_ptr)
-{
- /* generate machine code */
- tb->tb_next_offset[0] = 0xffff;
- tb->tb_next_offset[1] = 0xffff;
-#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
- return gen_intermediate_code_internal(env, tb,
- tb->tc_ptr, gen_code_size_ptr,
- 0, NULL);
-}
-
-static uint8_t dummy_gen_code_buf[GEN_CODE_MAX_SIZE];
-
-int cpu_restore_state_copy(TranslationBlock *tb,
- CPUState *env, unsigned long searched_pc,
- void *puc)
-{
- struct ucontext *uc = puc;
- int ret, eflags;
-
- /* find opc index corresponding to search_pc */
- if (searched_pc < (unsigned long)tb->tc_ptr)
- return -1;
- searched_pc = searched_pc - (long)tb->tc_ptr + (long)dummy_gen_code_buf;
- ret = gen_intermediate_code_internal(env, tb,
- dummy_gen_code_buf, NULL,
- 1, (uint8_t *)searched_pc);
- if (ret < 0)
- return ret;
- /* restore all the CPU state from the CPU context from the
- signal. The FPU context stays in the host CPU. */
-
- env->regs[R_EAX] = uc->uc_mcontext.gregs[REG_EAX];
- env->regs[R_ECX] = uc->uc_mcontext.gregs[REG_ECX];
- env->regs[R_EDX] = uc->uc_mcontext.gregs[REG_EDX];
- env->regs[R_EBX] = uc->uc_mcontext.gregs[REG_EBX];
- env->regs[R_ESP] = uc->uc_mcontext.gregs[REG_ESP];
- env->regs[R_EBP] = uc->uc_mcontext.gregs[REG_EBP];
- env->regs[R_ESI] = uc->uc_mcontext.gregs[REG_ESI];
- env->regs[R_EDI] = uc->uc_mcontext.gregs[REG_EDI];
- eflags = uc->uc_mcontext.gregs[REG_EFL];
- env->df = 1 - (2 * ((eflags >> 10) & 1));
- env->cc_src = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- env->cc_op = CC_OP_EFLAGS;
- return 0;
-}
-
-#endif /* USE_CODE_COPY */
projects / qemu-xen-3.3-testing.git / commitdiff