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fail/debuggers/openocd/opcode_parser/arm-opcode-data.c
Lars Rademacher c086800e58 openocd: added opcode parser 
Added opcode parser of the F.E.H.L.E.R-project for analysis of
memory access in mmu-abort handling, tracing, etc.

Change-Id: I5912fa4a4d51ee0501817c43bae05e87ac0e9b90
2014-01-22 17:54:09 +01:00

482 lines
9.8 KiB
C
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/*
* FAME - Fault Aware Micro-hypervisor Environment
*
* Author: Andreas Heinig <andreas.heinig@gmx.de>
*
* Copyright (C) 2011,2012 Department of Computer Science,
* Design Automation of Embedded Systems Group
* Dortmund University of Technology
*
* This program is proprietary software: you must not redistribute it.
* Using this software is only allowed inside the DFG SPP1500 F.E.H.L.E.R project,
* ls12-www.cs.tu-dortmund.de/daes/forschung/dependable-embedded-real-time-systems
*
* The complete license is depicted in the LICENSE file in the top level folder.
*/
#include <stdio.h>
#include "arm-opcode.h"
#define UNDEF_INSTRUCTION_MASK 0x0FB00000
#define UNDEF_INSTRUCTION_SIG 0x03000000
#define MISC_INSTRUCTION_1_MASK 0x0F900010
#define MISC_INSTRUCTION_1_SIG 0x01000000
#define MISC_INSTRUCTION_2_MASK 0x0F900090
#define MISC_INSTRUCTION_2_SIG 0x01000010
#define MSR_IMM_INSTRUCTION_MASK 0x0FB00000
#define MSR_IMM_INSTRUCTION_SIG 0x03200000
#define MUL_OR_EXTRA_LDSTR_INSTRUCTION_MASK 0x0E000090
#define MUL_OR_EXTRA_LDSTR_INSTRUCTION_SIG 0x00000090
#define OP_AND 0
#define OP_EOR 1
#define OP_SUB 2
#define OP_RSB 3
#define OP_ADD 4
#define OP_ADC 5
#define OP_SBC 6
#define OP_RSC 7
#define OP_TST 8
#define OP_TEQ 9
#define OP_CMP 10
#define OP_CMN 11
#define OP_ORR 12
#define OP_MOV 13
#define OP_BIC 14
#define OP_MVN 15
static const char * alu_op_str[16] = {
"AND",
"EOR",
"SUB",
"RSB",
"ADD",
"ADC",
"SBC",
"RSC",
"TST",
"TEQ",
"CMP",
"CMN",
"ORR",
"MOV",
"BIC",
"MVN"
};
int decode_data_processing(arm_instruction_t * op)
{
uint32_t inst = op->inst;
/* possible registers */
uint32_t rn = (inst >> 16) & 0xF;
uint32_t rd = (inst >> 12) & 0xF;
uint32_t rs = (inst >> 8) & 0xF;
uint32_t rm = (inst) & 0xF;
/*
* Undefined instruction ?
*/
if((inst & UNDEF_INSTRUCTION_MASK) == UNDEF_INSTRUCTION_SIG)
{
OP_PRINTF("Undefined Instruction\n")
return 0;
}
/*
* Miscellaneous instructions ?
*/
if((inst & MISC_INSTRUCTION_1_MASK) == MISC_INSTRUCTION_1_SIG ||
(inst & MISC_INSTRUCTION_2_MASK) == MISC_INSTRUCTION_2_SIG)
{
uint32_t op1 = (inst >> 21) & 3;
uint32_t op2 = (inst >> 4) & 0xf;
if(op2 == 0)
{
if(op1 & 1)
{
OP_PRINTF("MSR\t")
if(op1 & 2)
OP_PRINTF("SPSR, ")
else
OP_PRINTF("CPSR, ")
OP_PRINTF("R%d\n", (int)rm)
arm_op_add_reg_r(op, rm);
return 0;
}
else
{
OP_PRINTF("MRS\tR%d, ", (int)rd)
if(op1 & 2)
OP_PRINTF("SPSR\n")
else
OP_PRINTF("CPSR\n")
arm_op_add_reg_w(op, rd);
return 0;
}
}
if(op2 == 1)
{
if(op1 == 1)
{
OP_PRINTF("BX\tR%d\n", (int)rm)
arm_op_add_reg_r(op, rm);
return 0;
}
else if(op1 == 3)
{
OP_PRINTF("CLZ\tR%d, R%d\n", (int)rd, (int)rm)
arm_op_add_reg_r(op, rm);
arm_op_add_reg_w(op, rd);
return 0;
}
else
{
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
}
if(op2 == 2)
{
if(op1 == 1)
{
OP_PRINTF("BXJ\tR%d\n", (int)rm)
arm_op_add_reg_r(op, rm);
return 0;
}
else
{
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
}
if(op2 == 3)
{
if(op1 == 1)
{
OP_PRINTF("BLX\tR%d\n", (int)rm)
arm_op_add_reg_r(op, rm);
return 0;
}
else
{
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
}
if(op2 == 5)
{
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_w(op, rd);
switch(op1)
{
case 0:
OP_PRINTF("QADD\tR%d, R%d, R%d\n", (int)rd, (int)rm, (int)rn)
return 0;
case 1:
OP_PRINTF("QSUB\tR%d, R%d, R%d\n", (int)rd, (int)rm, (int)rn)
return 0;
case 2:
OP_PRINTF("QDADD\tR%d, R%d, R%d\n", (int)rd, (int)rm, (int)rn)
return 0;
case 3:
default:
OP_PRINTF("QDSUB\tR%d, R%d, R%d\n", (int)rd, (int)rm, (int)rn)
return 0;
}
}
if(op2 == 7)
{
if(op1 == 1)
{
OP_PRINTF("BKPT\n")
return 0;
}
else
{
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
}
if((op2 & 9) == 8)
{
char x = BIT_IS_SET(5) ? 'T' : 'B';
char y = BIT_IS_SET(6) ? 'T' : 'B';
arm_op_add_reg_w(op, rd);
switch(op1)
{
case 0:
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
OP_PRINTF("SMLA%c%c\tR%d, R%d, R%d, R%d\n", x, y, (int)rd, (int)rn, (int)rm, (int)rs)
return 0;
case 1:
if(x == 'B')
{
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
OP_PRINTF("SMLAW%c\tR%d, R%d, R%d, R%d\n", y, (int)rd, (int)rm, (int)rs, (int)rn)
return 0;
}
else
{
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rs);
OP_PRINTF("SMULW%c\tR%d, R%d, R%d\n", y, (int)rd, (int)rm, (int)rs)
return 0;
}
case 2:
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
OP_PRINTF("SMLAL%c%c\tR%d, R%d, R%d, R%d\n", x, y, (int)rd, (int)rn, (int)rm, (int)rs)
return 0;
case 3:
default:
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rs);
OP_PRINTF("SMLAL%c%c\tR%d, R%d, R%d\n", x, y, (int)rd, (int)rm, (int)rs)
return 0;
}
}
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
/*
* MSR with immediate ?
*/
if((inst & MSR_IMM_INSTRUCTION_MASK) == MSR_IMM_INSTRUCTION_SIG)
{
OP_PRINTF("MSR\t")
if(BIT_IS_SET(22))
OP_PRINTF("SPSR, immediate\n")
else
OP_PRINTF("CPSR, immediate\n")
return 0;
}
/*
* Multiplies or extra stores ?
*/
if((inst & MUL_OR_EXTRA_LDSTR_INSTRUCTION_MASK) == MUL_OR_EXTRA_LDSTR_INSTRUCTION_SIG)
{
uint32_t op1 = (inst >> 20) & 0x1F;
uint32_t op2 = (inst >> 5) & 3;
if(op2 == 0)
{
/* Multiply instructions */
if((op1 & 0x1C) == 0)
{
arm_op_add_reg_w(op, rd);
if(op1 & 2)
{
OP_PRINTF("MLA")
if(op1 & 1)
OP_PRINTF("S")
OP_PRINTF("\tR%d, R%d, R%d, R%d\n", (int)rd, (int)rm, (int)rs, (int)rn)
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
return 0;
}
else
{
OP_PRINTF("MUL")
if(op1 & 1)
OP_PRINTF("S")
OP_PRINTF("\tR%d, R%d, R%d\n", (int)rd, (int)rm, (int)rs)
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rs);
return 0;
}
}
if((op1 & 0x1F) == 4)
{
OP_PRINTF("UMAAL\tR%d, R%d, R%d, R%d\n", (int)rd, (int)rn, (int)rm, (int)rs)
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
return 0;
}
if((op1 & 0x18) == 8)
{
if(op1 & 4)
OP_PRINTF("S")
else
OP_PRINTF("U")
if(op1 & 2)
OP_PRINTF("MLAL")
else
OP_PRINTF("MULL")
if(op1 & 1)
OP_PRINTF("S")
OP_PRINTF("\tR%d, R%d, R%d, R%d\n", (int)rd, (int)rn, (int)rm, (int)rs)
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
arm_op_add_reg_r(op, rs);
return 0;
}
/* Load store */
if((op1 & 0x1B) == 0x10)
{
OP_PRINTF("SWP")
if(op1 & 4)
{
OP_PRINTF("B")
op->mem_size = 1;
}
else
op->mem_size = 4;
op->mem_addr = op->regs->r[rn];
op->flags = OP_FLAG_READ | OP_FLAG_WRITE;
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rm);
arm_op_add_reg_r(op, rn);
OP_PRINTF("\tR%d, R%d, R%d [Addr: %08x]\n", (int)rd, (int)rm, (int)rn, (unsigned int)op->mem_addr)
return 0;
}
if((op1 & 0x1E) == 0x18)
{
op->mem_size = 4;
op->mem_addr = op->regs->r[rn];
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rn);
if(op1 & 1)
{
OP_PRINTF("LDREX")
op->flags = OP_FLAG_READ;
}
else
{
OP_PRINTF("STREX")
op->flags = OP_FLAG_WRITE;
}
OP_PRINTF("\tR%d, R%d [Addr: %08x]\n", (int)rd, (int)rn, (unsigned int)op->mem_addr)
return 0;
}
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
if(op2 == 1)
{
if(op1 & 1)
{
OP_PRINTF("LDRH\tR%d, ", (int)rd)
op->flags = OP_FLAG_READ;
}
else
{
OP_PRINTF("STRH\tR%d, ", (int)rd)
op->flags = OP_FLAG_WRITE;
}
op->mem_size = 2;
arm_op_add_reg_w(op, rd);
decode_addressing_mode3(op);
OP_PRINTF("\n")
return 0;
}
if(op2 & 2)
{
if(op1 & 1)
{
if(op2 & 1)
{
op->mem_size = 2;
OP_PRINTF("LDRSH\tR%d, ", (int)rd)
}
else
{
op->mem_size = 1;
OP_PRINTF("LDRSB\tR%d, ", (int)rd)
}
op->flags = OP_FLAG_READ;
arm_op_add_reg_w(op, rd);
decode_addressing_mode3(op);
OP_PRINTF("\n")
return 0;
}
else
{
if(op2 & 1)
{
op->mem_size = 8;
op->flags = OP_FLAG_WRITE;
OP_PRINTF("STRD\tR%d:%d, ",(int) rd, (int)rd + 1)
}
else
{
op->mem_size = 8;
op->flags = OP_FLAG_READ;
OP_PRINTF("LDRD\tR%d:%d, ", (int)rd, (int)rd + 1)
}
arm_op_add_reg_w(op, rd);
arm_op_add_reg_w(op, rd + 1);
decode_addressing_mode3(op);
OP_PRINTF("\n")
return 0;
}
}
printf("\n%d: CANNOT parse %08x\n", __LINE__, (unsigned int)inst);
return 1;
}
/*
* The other possible instructions are ALU ?
*/
/* ALU opcode */
uint32_t opcode = (inst >> 21) & 0xF;
OP_PRINTF("%s", alu_op_str[opcode])
if(ALU_S_SET)
OP_PRINTF("S")
/* possibly normal ALU instructions */
if(opcode == OP_MOV || opcode == OP_MVN)
{
OP_PRINTF("\tR%d, ", (int)rd)
arm_op_add_reg_w(op, rd);
}
else if(opcode == OP_CMP || opcode == OP_CMN || opcode == OP_TST || opcode == OP_TEQ)
{
OP_PRINTF("\tR%d, ", (int)rn)
arm_op_add_reg_r(op, rn);
}
else
{
OP_PRINTF("\tR%d, R%d, ", (int)rd, (int)rn)
arm_op_add_reg_w(op, rd);
arm_op_add_reg_r(op, rn);
}
decode_addressing_mode1(op);
OP_PRINTF("\n")
return 0;
}
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