dolphin/Externals/Bochs_disasm/resolve.cc
Fiora 290643ad25 Externals: update Bochs to newer version
Should resolve the disassembler not handling all the opcodes Dolphin generates.
2014-08-15 00:44:37 -07:00

697 lines
19 KiB
C++

/////////////////////////////////////////////////////////////////////////
// $Id: resolve.cc 11863 2013-10-07 19:23:19Z sshwarts $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2005-2013 Stanislav Shwartsman
// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
//
// 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <assert.h>
#include "disasm.h"
void disassembler::decode_modrm(x86_insn *insn)
{
insn->modrm = fetch_byte();
BX_DECODE_MODRM(insn->modrm, insn->mod, insn->nnn, insn->rm);
// MOVs with CRx and DRx always use register ops and ignore the mod field.
if ((insn->b1 & ~3) == 0x120) insn->mod = 3;
insn->nnn |= insn->rex_r;
insn->rm |= insn->rex_b;
if (insn->mod == 3) {
return; /* mod, reg, reg */
}
if (insn->as_64)
{
if ((insn->rm & 7) != 4) { /* rm != 100b, no s-i-b byte */
// one byte modrm
switch (insn->mod) {
case 0:
resolve_modrm = &disassembler::resolve64_mod0;
if ((insn->rm & 7) == 5) /* no reg, 32-bit displacement */
insn->displacement.displ32 = fetch_dword();
break;
case 1:
/* reg, 8-bit displacement, sign extend */
resolve_modrm = &disassembler::resolve64_mod1or2;
insn->displacement.displ32 = (Bit8s) fetch_byte();
break;
case 2:
/* reg, 32-bit displacement */
resolve_modrm = &disassembler::resolve64_mod1or2;
insn->displacement.displ32 = fetch_dword();
break;
} /* switch (mod) */
} /* if (rm != 4) */
else { /* rm == 4, s-i-b byte follows */
insn->sib = fetch_byte();
BX_DECODE_SIB(insn->sib, insn->scale, insn->index, insn->base);
insn->base |= insn->rex_b;
insn->index |= insn->rex_x;
switch (insn->mod) {
case 0:
resolve_modrm = &disassembler::resolve64_mod0_rm4;
if ((insn->base & 7) == 5)
insn->displacement.displ32 = fetch_dword();
break;
case 1:
resolve_modrm = &disassembler::resolve64_mod1or2_rm4;
insn->displacement.displ32 = (Bit8s) fetch_byte();
break;
case 2:
resolve_modrm = &disassembler::resolve64_mod1or2_rm4;
insn->displacement.displ32 = fetch_dword();
break;
}
} /* s-i-b byte follows */
}
else
{
if (insn->as_32)
{
if ((insn->rm & 7) != 4) { /* rm != 100b, no s-i-b byte */
// one byte modrm
switch (insn->mod) {
case 0:
resolve_modrm = &disassembler::resolve32_mod0;
if ((insn->rm & 7) == 5) /* no reg, 32-bit displacement */
insn->displacement.displ32 = fetch_dword();
break;
case 1:
/* reg, 8-bit displacement, sign extend */
resolve_modrm = &disassembler::resolve32_mod1or2;
insn->displacement.displ32 = (Bit8s) fetch_byte();
break;
case 2:
/* reg, 32-bit displacement */
resolve_modrm = &disassembler::resolve32_mod1or2;
insn->displacement.displ32 = fetch_dword();
break;
} /* switch (mod) */
} /* if (rm != 4) */
else { /* rm == 4, s-i-b byte follows */
insn->sib = fetch_byte();
BX_DECODE_SIB(insn->sib, insn->scale, insn->index, insn->base);
insn->base |= insn->rex_b;
insn->index |= insn->rex_x;
switch (insn->mod) {
case 0:
resolve_modrm = &disassembler::resolve32_mod0_rm4;
if ((insn->base & 7) == 5)
insn->displacement.displ32 = fetch_dword();
break;
case 1:
resolve_modrm = &disassembler::resolve32_mod1or2_rm4;
insn->displacement.displ32 = (Bit8s) fetch_byte();
break;
case 2:
resolve_modrm = &disassembler::resolve32_mod1or2_rm4;
insn->displacement.displ32 = fetch_dword();
break;
}
} /* s-i-b byte follows */
}
else {
assert(insn->rex_b == 0);
assert(insn->rex_x == 0);
assert(insn->rex_r == 0);
/* 16 bit addressing modes. */
switch (insn->mod) {
case 0:
resolve_modrm = &disassembler::resolve16_mod0;
if(insn->rm == 6)
insn->displacement.displ16 = fetch_word();
break;
case 1:
/* reg, 8-bit displacement, sign extend */
resolve_modrm = &disassembler::resolve16_mod1or2;
insn->displacement.displ16 = (Bit8s) fetch_byte();
break;
case 2:
resolve_modrm = &disassembler::resolve16_mod1or2;
insn->displacement.displ16 = fetch_word();
break;
} /* switch (mod) ... */
}
}
}
void disassembler::resolve16_mod0(const x86_insn *insn, unsigned datasize)
{
const char *seg;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod00_rm16[insn->rm];
if(insn->rm == 6)
print_memory_access16(datasize, seg, NULL, insn->displacement.displ16);
else
print_memory_access16(datasize, seg, index16[insn->rm], 0);
}
void disassembler::resolve16_mod1or2(const x86_insn *insn, unsigned datasize)
{
const char *seg;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod01or10_rm16[insn->rm];
print_memory_access16(datasize, seg, index16[insn->rm], insn->displacement.displ16);
}
void disassembler::resolve32_mod0(const x86_insn *insn, unsigned datasize)
{
const char *seg, *eip_regname = NULL;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = segment_name[DS_REG];
if (insn->is_64) {
if (intel_mode) eip_regname = "eip";
else eip_regname = "%eip";
}
if ((insn->rm & 7) == 5) /* no reg, 32-bit displacement */
print_memory_access32(datasize, seg, eip_regname, NULL, 0, insn->displacement.displ32);
else
print_memory_access32(datasize, seg, general_32bit_regname[insn->rm], NULL, 0, 0);
}
void disassembler::resolve32_mod1or2(const x86_insn *insn, unsigned datasize)
{
const char *seg;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod01or10_base32[insn->rm];
print_memory_access32(datasize, seg,
general_32bit_regname[insn->rm], NULL, 0, insn->displacement.displ32);
}
void disassembler::resolve32_mod0_rm4(const x86_insn *insn, unsigned datasize)
{
char vsib_index[8];
const char *seg, *base = NULL, *index = NULL;
Bit32u disp32 = 0;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod00_base32[insn->base];
if ((insn->base & 7) != 5)
base = general_32bit_regname[insn->base];
else
disp32 = insn->displacement.displ32;
if (datasize & VSIB_Index) {
sprintf(vsib_index, "%s%d", vector_reg_name[insn->vex_l], insn->index);
index = vsib_index;
}
else {
if (insn->index != 4)
index = general_32bit_regname[insn->index];
}
print_memory_access32(datasize, seg, base, index, insn->scale, disp32);
}
void disassembler::resolve32_mod1or2_rm4(const x86_insn *insn, unsigned datasize)
{
char vsib_index[8];
const char *seg, *index = NULL;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod01or10_base32[insn->base];
if (datasize & VSIB_Index) {
sprintf(vsib_index, "%s%d", vector_reg_name[insn->vex_l], insn->index);
index = vsib_index;
}
else {
if (insn->index != 4)
index = general_32bit_regname[insn->index];
}
print_memory_access32(datasize, seg,
general_32bit_regname[insn->base], index, insn->scale, insn->displacement.displ32);
}
void disassembler::resolve64_mod0(const x86_insn *insn, unsigned datasize)
{
const char *seg, *rip_regname;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = segment_name[DS_REG];
if (intel_mode) rip_regname = "rip";
else rip_regname = "%rip";
if ((insn->rm & 7) == 5) /* no reg, 32-bit displacement */
print_memory_access64(datasize, seg, rip_regname, NULL, 0, (Bit32s) insn->displacement.displ32);
else
print_memory_access64(datasize, seg, general_64bit_regname[insn->rm], NULL, 0, 0);
}
void disassembler::resolve64_mod1or2(const x86_insn *insn, unsigned datasize)
{
const char *seg;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod01or10_base32[insn->rm];
print_memory_access64(datasize, seg,
general_64bit_regname[insn->rm], NULL, 0, (Bit32s) insn->displacement.displ32);
}
void disassembler::resolve64_mod0_rm4(const x86_insn *insn, unsigned datasize)
{
char vsib_index[8];
const char *seg, *base = NULL, *index = NULL;
Bit32s disp32 = 0;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod00_base32[insn->base];
if ((insn->base & 7) != 5)
base = general_64bit_regname[insn->base];
else
disp32 = (Bit32s) insn->displacement.displ32;
if (datasize & VSIB_Index) {
sprintf(vsib_index, "%s%d", vector_reg_name[insn->vex_l], insn->index);
index = vsib_index;
}
else {
if (insn->index != 4)
index = general_64bit_regname[insn->index];
}
print_memory_access64(datasize, seg, base, index, insn->scale, disp32);
}
void disassembler::resolve64_mod1or2_rm4(const x86_insn *insn, unsigned datasize)
{
char vsib_index[8];
const char *seg, *index = NULL;
if (insn->is_seg_override())
seg = segment_name[insn->seg_override];
else
seg = sreg_mod01or10_base32[insn->base];
if (datasize & VSIB_Index) {
sprintf(vsib_index, "%s%d", vector_reg_name[insn->vex_l], insn->index);
index = vsib_index;
}
else {
if (insn->index != 4)
index = general_64bit_regname[insn->index];
}
print_memory_access64(datasize, seg,
general_64bit_regname[insn->base], index, insn->scale, (Bit32s) insn->displacement.displ32);
}
void disassembler::print_datasize(unsigned size)
{
if (!intel_mode || !print_mem_datasize) return;
switch(size & 0xf)
{
case B_SIZE:
dis_sprintf("byte ptr ");
break;
case W_SIZE:
dis_sprintf("word ptr ");
break;
case D_SIZE:
dis_sprintf("dword ptr ");
break;
case Q_SIZE:
dis_sprintf("qword ptr ");
break;
case T_SIZE:
dis_sprintf("tbyte ptr ");
break;
case XMM_SIZE:
dis_sprintf("dqword ptr ");
break;
case YMM_SIZE:
dis_sprintf("qqword ptr ");
break;
case X_SIZE:
break;
};
}
void disassembler::print_memory_access16(int datasize,
const char *seg, const char *index, Bit16u disp)
{
print_datasize(datasize);
dis_sprintf("%s:", seg);
if (intel_mode)
{
if (index == NULL)
{
dis_sprintf("0x%04x", (unsigned) disp);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+0x%04x]", index, (unsigned) disp);
else
dis_sprintf("[%s%+d]", index, (int) (Bit16s) disp);
}
else
dis_sprintf("[%s]", index);
}
}
else
{
if (index == NULL)
{
dis_sprintf("0x%04x", (unsigned) disp);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%04x(%s,1)", (unsigned) disp, index);
else
dis_sprintf("%d(%s,1)", (int) (Bit16s) disp, index);
}
else
dis_sprintf("(%s,1)", index);
}
}
}
void disassembler::print_memory_access32(int datasize,
const char *seg, const char *base, const char *index, int scale, Bit32s disp)
{
print_datasize(datasize);
dis_sprintf("%s:", seg);
scale = 1 << scale;
if (intel_mode)
{
if (base == NULL)
{
if (index == NULL)
{
dis_sprintf("0x%08x", (unsigned) disp);
}
else
{
if (scale != 1)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s*%d+0x%08x]", index, scale, (unsigned) disp);
else
dis_sprintf("[%s*%d%+d]", index, scale, (int) disp);
}
else
dis_sprintf("[%s*%d]", index, scale);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+0x%08x]", index, (unsigned) disp);
else
dis_sprintf("[%s%+d]", index, (int) disp);
}
else {
dis_sprintf("[%s]", index);
}
}
}
}
else
{
if (index == NULL)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+0x%08x]", base, (unsigned) disp);
else
dis_sprintf("[%s%+d]", base, (int) disp);
}
else {
dis_sprintf("[%s]", base);
}
}
else
{
if (scale != 1)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+%s*%d+0x%08x]", base, index, scale, (unsigned) disp);
else
dis_sprintf("[%s+%s*%d%+d]", base, index, scale, (int) disp);
}
else {
dis_sprintf("[%s+%s*%d]", base, index, scale);
}
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+%s+0x%08x]", base, index, (unsigned) disp);
else
dis_sprintf("[%s+%s%+d]", base, index, (int) disp);
}
else
dis_sprintf("[%s+%s]", base, index);
}
}
}
}
else
{
if (base == NULL)
{
if (index == NULL)
{
dis_sprintf("0x%08x", (unsigned) disp);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x(,%s,%d)", (unsigned) disp, index, scale);
else
dis_sprintf("%d(,%s,%d)", (int) disp, index, scale);
}
else
dis_sprintf("(,%s,%d)", index, scale);
}
}
else
{
if (index == NULL)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x(%s)", (unsigned) disp, base);
else
dis_sprintf("%d(%s)", (int) disp, base);
}
else
dis_sprintf("(%s)", base);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x(%s,%s,%d)", (unsigned) disp, base, index, scale);
else
dis_sprintf("%d(%s,%s,%d)", (int) disp, base, index, scale);
}
else
dis_sprintf("(%s,%s,%d)", base, index, scale);
}
}
}
}
void disassembler::print_memory_access64(int datasize,
const char *seg, const char *base, const char *index, int scale, Bit32s disp)
{
Bit64u disp64 = (Bit64s) disp;
print_datasize(datasize);
dis_sprintf("%s:", seg);
scale = 1 << scale;
if (intel_mode)
{
if (base == NULL)
{
if (index == NULL)
{
dis_sprintf("0x%08x%08x", GET32H(disp64), GET32L(disp64));
}
else
{
if (scale != 1)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s*%d+0x%08x%08x]", index, scale, GET32H(disp64), GET32L(disp64));
else
dis_sprintf("[%s*%d%+d]", index, scale, (int) disp);
}
else
dis_sprintf("[%s*%d]", index, scale);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+0x%08x%08x]", index, GET32H(disp64), GET32L(disp64));
else
dis_sprintf("[%s%+d]", index, (int) disp);
}
else {
dis_sprintf("[%s]", index);
}
}
}
}
else
{
if (index == NULL)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+0x%08x%08x]", base, GET32H(disp64), GET32L(disp64));
else
dis_sprintf("[%s%+d]", base, (int) disp);
}
else {
dis_sprintf("[%s]", base);
}
}
else
{
if (scale != 1)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+%s*%d+0x%08x%08x]", base, index, scale, GET32H(disp64), GET32L(disp64));
else
dis_sprintf("[%s+%s*%d%+d]", base, index, scale, (int) disp);
}
else {
dis_sprintf("[%s+%s*%d]", base, index, scale);
}
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("[%s+%s+0x%08x%08x]", base, index, GET32H(disp64), GET32L(disp64));
else
dis_sprintf("[%s+%s%+d]", base, index, (int) disp);
}
else
dis_sprintf("[%s+%s]", base, index);
}
}
}
}
else
{
if (base == NULL)
{
if (index == NULL)
{
dis_sprintf("0x%08x%08x", GET32H(disp64), GET32L(disp64));
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x%08x(,%s,%d)", GET32H(disp64), GET32L(disp64), index, scale);
else
dis_sprintf("%d(,%s,%d)", (int) disp, index, scale);
}
else
dis_sprintf("(,%s,%d)", index, scale);
}
}
else
{
if (index == NULL)
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x%08x(%s)", GET32H(disp64), GET32L(disp64), base);
else
dis_sprintf("%d(%s)", (int) disp, base);
}
else
dis_sprintf("(%s)", base);
}
else
{
if (disp != 0) {
if (offset_mode_hex)
dis_sprintf("0x%08x%08x(%s,%s,%d)", GET32H(disp64), GET32L(disp64), base, index, scale);
else
dis_sprintf("%d(%s,%s,%d)", (int) disp, base, index, scale);
}
else
dis_sprintf("(%s,%s,%d)", base, index, scale);
}
}
}
}