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capstone/arch/Sparc/SparcInstPrinter.c

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3 years ago
//===-- SparcInstPrinter.cpp - Convert Sparc MCInst to assembly syntax --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class prints an Sparc MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2015 */
#ifdef CAPSTONE_HAS_SPARC
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
#if defined (WIN32) || defined (WIN64) || defined (_WIN32) || defined (_WIN64)
#pragma warning(disable:28719) // disable MSVC's warning on strncpy()
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "SparcInstPrinter.h"
#include "../../MCInst.h"
#include "../../utils.h"
#include "../../SStream.h"
#include "../../MCRegisterInfo.h"
#include "../../MathExtras.h"
#include "SparcMapping.h"
#include "Sparc.h"
static const char *getRegisterName(unsigned RegNo);
static void printInstruction(MCInst *MI, SStream *O, const MCRegisterInfo *MRI);
static void printMemOperand(MCInst *MI, int opNum, SStream *O, const char *Modifier);
static void printOperand(MCInst *MI, int opNum, SStream *O);
static void Sparc_add_hint(MCInst *MI, unsigned int hint)
{
if (MI->csh->detail) {
MI->flat_insn->detail->sparc.hint = hint;
}
}
static void Sparc_add_reg(MCInst *MI, unsigned int reg)
{
if (MI->csh->detail) {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].type = SPARC_OP_REG;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].reg = reg;
MI->flat_insn->detail->sparc.op_count++;
}
}
static void set_mem_access(MCInst *MI, bool status)
{
if (MI->csh->detail != CS_OPT_ON)
return;
MI->csh->doing_mem = status;
if (status) {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].type = SPARC_OP_MEM;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.base = SPARC_REG_INVALID;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.disp = 0;
} else {
// done, create the next operand slot
MI->flat_insn->detail->sparc.op_count++;
}
}
void Sparc_post_printer(csh ud, cs_insn *insn, char *insn_asm, MCInst *mci)
{
if (((cs_struct *)ud)->detail != CS_OPT_ON)
return;
// fix up some instructions
if (insn->id == SPARC_INS_CASX) {
// first op is actually a memop, not regop
insn->detail->sparc.operands[0].type = SPARC_OP_MEM;
insn->detail->sparc.operands[0].mem.base = (uint8_t)insn->detail->sparc.operands[0].reg;
insn->detail->sparc.operands[0].mem.disp = 0;
}
}
static void printRegName(SStream *OS, unsigned RegNo)
{
SStream_concat0(OS, "%");
SStream_concat0(OS, getRegisterName(RegNo));
}
#define GET_INSTRINFO_ENUM
#include "SparcGenInstrInfo.inc"
#define GET_REGINFO_ENUM
#include "SparcGenRegisterInfo.inc"
static bool printSparcAliasInstr(MCInst *MI, SStream *O)
{
switch (MCInst_getOpcode(MI)) {
default: return false;
case SP_JMPLrr:
case SP_JMPLri:
if (MCInst_getNumOperands(MI) != 3)
return false;
if (!MCOperand_isReg(MCInst_getOperand(MI, 0)))
return false;
switch (MCOperand_getReg(MCInst_getOperand(MI, 0))) {
default: return false;
case SP_G0: // jmp $addr | ret | retl
if (MCOperand_isImm(MCInst_getOperand(MI, 2)) &&
MCOperand_getImm(MCInst_getOperand(MI, 2)) == 8) {
switch(MCOperand_getReg(MCInst_getOperand(MI, 1))) {
default: break;
case SP_I7: SStream_concat0(O, "ret"); MCInst_setOpcodePub(MI, SPARC_INS_RET); return true;
case SP_O7: SStream_concat0(O, "retl"); MCInst_setOpcodePub(MI, SPARC_INS_RETL); return true;
}
}
SStream_concat0(O, "jmp\t");
MCInst_setOpcodePub(MI, SPARC_INS_JMP);
printMemOperand(MI, 1, O, NULL);
return true;
case SP_O7: // call $addr
SStream_concat0(O, "call ");
MCInst_setOpcodePub(MI, SPARC_INS_CALL);
printMemOperand(MI, 1, O, NULL);
return true;
}
case SP_V9FCMPS:
case SP_V9FCMPD:
case SP_V9FCMPQ:
case SP_V9FCMPES:
case SP_V9FCMPED:
case SP_V9FCMPEQ:
if (MI->csh->mode & CS_MODE_V9 || (MCInst_getNumOperands(MI) != 3) ||
(!MCOperand_isReg(MCInst_getOperand(MI, 0))) ||
(MCOperand_getReg(MCInst_getOperand(MI, 0)) != SP_FCC0))
return false;
// if V8, skip printing %fcc0.
switch(MCInst_getOpcode(MI)) {
default:
case SP_V9FCMPS: SStream_concat0(O, "fcmps\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPS); break;
case SP_V9FCMPD: SStream_concat0(O, "fcmpd\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPD); break;
case SP_V9FCMPQ: SStream_concat0(O, "fcmpq\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPQ); break;
case SP_V9FCMPES: SStream_concat0(O, "fcmpes\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPES); break;
case SP_V9FCMPED: SStream_concat0(O, "fcmped\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPED); break;
case SP_V9FCMPEQ: SStream_concat0(O, "fcmpeq\t"); MCInst_setOpcodePub(MI, SPARC_INS_FCMPEQ); break;
}
printOperand(MI, 1, O);
SStream_concat0(O, ", ");
printOperand(MI, 2, O);
return true;
}
}
static void printOperand(MCInst *MI, int opNum, SStream *O)
{
int64_t Imm;
unsigned reg;
MCOperand *MO = MCInst_getOperand(MI, opNum);
if (MCOperand_isReg(MO)) {
reg = MCOperand_getReg(MO);
printRegName(O, reg);
reg = Sparc_map_register(reg);
if (MI->csh->detail) {
if (MI->csh->doing_mem) {
if (MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.base)
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.index = (uint8_t)reg;
else
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.base = (uint8_t)reg;
} else {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].type = SPARC_OP_REG;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].reg = reg;
MI->flat_insn->detail->sparc.op_count++;
}
}
return;
}
if (MCOperand_isImm(MO)) {
Imm = (int)MCOperand_getImm(MO);
// Conditional branches displacements needs to be signextended to be
// able to jump backwards.
//
// Displacements are measured as the number of instructions forward or
// backward, so they need to be multiplied by 4
switch (MI->Opcode) {
case SP_CALL:
// Imm = SignExtend32(Imm, 30);
Imm += MI->address;
break;
// Branch on integer condition with prediction (BPcc)
// Branch on floating point condition with prediction (FBPfcc)
case SP_BPICC:
case SP_BPICCA:
case SP_BPICCANT:
case SP_BPICCNT:
case SP_BPXCC:
case SP_BPXCCA:
case SP_BPXCCANT:
case SP_BPXCCNT:
case SP_BPFCC:
case SP_BPFCCA:
case SP_BPFCCANT:
case SP_BPFCCNT:
Imm = SignExtend32((uint32_t)Imm, 19);
Imm = MI->address + Imm * 4;
break;
// Branch on integer condition (Bicc)
// Branch on floating point condition (FBfcc)
case SP_BA:
case SP_BCOND:
case SP_BCONDA:
case SP_FBCOND:
case SP_FBCONDA:
Imm = SignExtend32((uint32_t)Imm, 22);
Imm = MI->address + Imm * 4;
break;
// Branch on integer register with prediction (BPr)
case SP_BPGEZapn:
case SP_BPGEZapt:
case SP_BPGEZnapn:
case SP_BPGEZnapt:
case SP_BPGZapn:
case SP_BPGZapt:
case SP_BPGZnapn:
case SP_BPGZnapt:
case SP_BPLEZapn:
case SP_BPLEZapt:
case SP_BPLEZnapn:
case SP_BPLEZnapt:
case SP_BPLZapn:
case SP_BPLZapt:
case SP_BPLZnapn:
case SP_BPLZnapt:
case SP_BPNZapn:
case SP_BPNZapt:
case SP_BPNZnapn:
case SP_BPNZnapt:
case SP_BPZapn:
case SP_BPZapt:
case SP_BPZnapn:
case SP_BPZnapt:
Imm = SignExtend32((uint32_t)Imm, 16);
Imm = MI->address + Imm * 4;
break;
}
printInt64(O, Imm);
if (MI->csh->detail) {
if (MI->csh->doing_mem) {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].mem.disp = (uint32_t)Imm;
} else {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].type = SPARC_OP_IMM;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].imm = Imm;
MI->flat_insn->detail->sparc.op_count++;
}
}
}
return;
}
static void printMemOperand(MCInst *MI, int opNum, SStream *O, const char *Modifier)
{
MCOperand *MO;
set_mem_access(MI, true);
printOperand(MI, opNum, O);
// If this is an ADD operand, emit it like normal operands.
if (Modifier && !strcmp(Modifier, "arith")) {
SStream_concat0(O, ", ");
printOperand(MI, opNum + 1, O);
set_mem_access(MI, false);
return;
}
MO = MCInst_getOperand(MI, opNum + 1);
if (MCOperand_isReg(MO) && (MCOperand_getReg(MO) == SP_G0)) {
set_mem_access(MI, false);
return; // don't print "+%g0"
}
if (MCOperand_isImm(MO) && (MCOperand_getImm(MO) == 0)) {
set_mem_access(MI, false);
return; // don't print "+0"
}
SStream_concat0(O, "+"); // qq
printOperand(MI, opNum + 1, O);
set_mem_access(MI, false);
}
static void printCCOperand(MCInst *MI, int opNum, SStream *O)
{
int CC = (int)MCOperand_getImm(MCInst_getOperand(MI, opNum)) + 256;
switch (MCInst_getOpcode(MI)) {
default: break;
case SP_FBCOND:
case SP_FBCONDA:
case SP_BPFCC:
case SP_BPFCCA:
case SP_BPFCCNT:
case SP_BPFCCANT:
case SP_MOVFCCrr: case SP_V9MOVFCCrr:
case SP_MOVFCCri: case SP_V9MOVFCCri:
case SP_FMOVS_FCC: case SP_V9FMOVS_FCC:
case SP_FMOVD_FCC: case SP_V9FMOVD_FCC:
case SP_FMOVQ_FCC: case SP_V9FMOVQ_FCC:
// Make sure CC is a fp conditional flag.
CC = (CC < 16+256) ? (CC + 16) : CC;
break;
}
SStream_concat0(O, SPARCCondCodeToString((sparc_cc)CC));
if (MI->csh->detail)
MI->flat_insn->detail->sparc.cc = (sparc_cc)CC;
}
static bool printGetPCX(MCInst *MI, unsigned opNum, SStream *O)
{
return true;
}
#define PRINT_ALIAS_INSTR
#include "SparcGenAsmWriter.inc"
void Sparc_printInst(MCInst *MI, SStream *O, void *Info)
{
char *mnem, *p;
char instr[64]; // Sparc has no instruction this long
mnem = printAliasInstr(MI, O, Info);
if (mnem) {
// fixup instruction id due to the change in alias instruction
strncpy(instr, mnem, sizeof(instr));
instr[sizeof(instr) - 1] = '\0';
// does this contains hint with a coma?
p = strchr(instr, ',');
if (p)
*p = '\0'; // now instr only has instruction mnemonic
MCInst_setOpcodePub(MI, Sparc_map_insn(instr));
switch(MCInst_getOpcode(MI)) {
case SP_BCOND:
case SP_BCONDA:
case SP_BPICCANT:
case SP_BPICCNT:
case SP_BPXCCANT:
case SP_BPXCCNT:
case SP_TXCCri:
case SP_TXCCrr:
if (MI->csh->detail) {
// skip 'b', 't'
MI->flat_insn->detail->sparc.cc = Sparc_map_ICC(instr + 1);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
case SP_BPFCCANT:
case SP_BPFCCNT:
if (MI->csh->detail) {
// skip 'fb'
MI->flat_insn->detail->sparc.cc = Sparc_map_FCC(instr + 2);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
case SP_FMOVD_ICC:
case SP_FMOVD_XCC:
case SP_FMOVQ_ICC:
case SP_FMOVQ_XCC:
case SP_FMOVS_ICC:
case SP_FMOVS_XCC:
if (MI->csh->detail) {
// skip 'fmovd', 'fmovq', 'fmovs'
MI->flat_insn->detail->sparc.cc = Sparc_map_ICC(instr + 5);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
case SP_MOVICCri:
case SP_MOVICCrr:
case SP_MOVXCCri:
case SP_MOVXCCrr:
if (MI->csh->detail) {
// skip 'mov'
MI->flat_insn->detail->sparc.cc = Sparc_map_ICC(instr + 3);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
case SP_V9FMOVD_FCC:
case SP_V9FMOVQ_FCC:
case SP_V9FMOVS_FCC:
if (MI->csh->detail) {
// skip 'fmovd', 'fmovq', 'fmovs'
MI->flat_insn->detail->sparc.cc = Sparc_map_FCC(instr + 5);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
case SP_V9MOVFCCri:
case SP_V9MOVFCCrr:
if (MI->csh->detail) {
// skip 'mov'
MI->flat_insn->detail->sparc.cc = Sparc_map_FCC(instr + 3);
MI->flat_insn->detail->sparc.hint = Sparc_map_hint(mnem);
}
break;
default:
break;
}
cs_mem_free(mnem);
} else {
if (!printSparcAliasInstr(MI, O))
printInstruction(MI, O, NULL);
}
}
void Sparc_addReg(MCInst *MI, int reg)
{
if (MI->csh->detail) {
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].type = SPARC_OP_REG;
MI->flat_insn->detail->sparc.operands[MI->flat_insn->detail->sparc.op_count].reg = reg;
MI->flat_insn->detail->sparc.op_count++;
}
}
#endif