/**********************************************************************
* pdasm.c
* P-Code Disassembler
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**********************************************************************/
/**********************************************************************
* Included Files
**********************************************************************/
#include <stdint.h>
#include <stdio.h>
#include "keywords.h"
#include "podefs.h"
#include "pinsn32.h"
#include "pfdefs.h"
#include "pxdefs.h"
#include "paslib.h"
#include "pinsn.h"
/**********************************************************************
* Private Types
**********************************************************************/
/* These are all the format codes that apply to opcodes with an argument */
enum {
SIMPLE = 0, /* No argument */
HEX, /* Hexadecimal argument */
DECIMAL, /* Signed Decimal argument (w/shift) */
UDECIMAL, /* Unsigned Decimal argument (w/shift) */
LABEL_DEC, /* Label number */
xOP, lbOP, fpOP, /* Sub opcode */
FILENO, LINENO /* File number, line number */
};
/* The following table defines everything that is needed to disassemble
* a P-Code. NOTE: The order of definition in this table must exactly
* match the declaration sequence in pinsn.h. */
static const char invOp[] = "Invalid Opcode";
struct optab_s
{
const char *opName; /* Opcode mnemonics */
uint8_t format; /* arg16 format */
};
/******************** OPCODES WITH NO ARGUMENTS *************************/
static const struct optab_s g_sNoArgOpTable[64] =
{
/* Program control (No stack arguments) */
/* 0x00 */ { "NOP ", SIMPLE },
/* Arithmetic & logical & and integer conversions (One stack argument) */
/* 0x01 */ { "NEG ", SIMPLE },
/* 0x02 */ { "ABS ", SIMPLE },
/* 0x03 */ { "INC ", SIMPLE },
/* 0x04 */ { "DEC ", SIMPLE },
/* 0x05 */ { "NOT ", SIMPLE },
/* Arithmetic & logical (Two stack arguments) */
/* 0x06 */ { "ADD ", SIMPLE },
/* 0x07 */ { "SUB ", SIMPLE },
/* 0x08 */ { "MUL ", SIMPLE },
/* 0x09 */ { "DIV ", SIMPLE },
/* 0x0a */ { "MOD ", SIMPLE },
/* 0x0b */ { "SLL ", SIMPLE },
/* 0x0c */ { "SRL ", SIMPLE },
/* 0x0d */ { "SRA ", SIMPLE },
/* 0x0e */ { "OR ", SIMPLE },
/* 0x0f */ { "AND ", SIMPLE },
/* Comparisons (One stack argument) */
/* 0x10 */ { "EQUZ ", SIMPLE },
/* 0x11 */ { "NEQZ ", SIMPLE },
/* 0x12 */ { "LTZ ", SIMPLE },
/* 0x13 */ { "GTEZ ", SIMPLE },
/* 0x14 */ { "GTZ ", SIMPLE },
/* 0x15 */ { "LTEZ ", SIMPLE },
/* 0x16 */ { invOp, SIMPLE },
/* 0x17 */ { invOp, SIMPLE },
/* Comparisons (Two stack arguments) */
/* 0x18 */ { "EQU ", SIMPLE },
/* 0x19 */ { "NEQ ", SIMPLE },
/* 0x1a */ { "LT ", SIMPLE },
/* 0x1b */ { "GTE ", SIMPLE },
/* 0x1c */ { "GT ", SIMPLE },
/* 0x1d */ { "LTE ", SIMPLE },
/* 0x1e */ { invOp, SIMPLE },
/* 0x1f */ { "BIT ", SIMPLE },
/* Load (One) or Store (Two stack argument) */
/* 0x20 */ { "LDI ", SIMPLE },
/* 0x21 */ { "LDIH", SIMPLE },
/* 0x22 */ { "LDIB", SIMPLE },
/* 0x23 */ { "LDIM", SIMPLE },
/* 0x24 */ { "STI ", SIMPLE },
/* 0x25 */ { "STIH", SIMPLE },
/* 0x26 */ { "STIB", SIMPLE },
/* 0x27 */ { "STIM", SIMPLE },
/* Data stack operations */
/* 0x28 */ { "DUP ", SIMPLE },
/* 0x29 */ { "DUPH ", SIMPLE },
/* 0x2a */ { "PUSHS", SIMPLE },
/* 0x2b */ { "POPS", SIMPLE },
/* 0x2c */ { invOp, SIMPLE },
/* 0x2d */ { invOp, SIMPLE },
/* 0x2e */ { invOp, SIMPLE },
/* 0x2f */ { "RET ", SIMPLE },
/* 0x30 */ { invOp, SIMPLE },
/* 0x31 */ { invOp, SIMPLE },
/* 0x32 */ { invOp, SIMPLE },
/* 0x33 */ { invOp, SIMPLE },
/* 0x34 */ { invOp, SIMPLE },
/* 0x35 */ { invOp, SIMPLE },
/* 0x36 */ { invOp, SIMPLE },
/* 0x37 */ { invOp, SIMPLE },
/* System Functions (No stack arguments) */
/* 0x38 */ { invOp, SIMPLE },
/* 0x39 */ { invOp, SIMPLE },
/* 0x3a */ { invOp, SIMPLE },
/* 0x3b */ { invOp, SIMPLE },
/* 0x3c */ { invOp, SIMPLE },
/* 0x3d */ { invOp, SIMPLE },
/* 0x3e */ { invOp, SIMPLE },
/* 0x3f */ { "EXIT ", SIMPLE }
};
/****************** OPCODES WITH 25-BIT ARGUMENT ************************/
static const struct optab_s g_sArg32OpTable[64] =
{
/* Load: arg = unsigned base offset */
/* 0x80 */ { "LD ", UDECIMAL }, /* No stack arguments */
/* 0x81 */ { "LDH ", UDECIMAL }, /* No stack arguments */
/* 0x82 */ { "LDB ", UDECIMAL }, /* No stack arguments */
/* 0x83 */ { "LDM ", UDECIMAL }, /* One 32-bit stack argument */
/* Store: arg = unsigned base offset (One stack arguments) */
/* 0x84 */ { "ST ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x85 */ { "STH ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x86 */ { "STB ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x87 */ { "STM ", UDECIMAL }, /* One+n 32-bit stack argument */
/* Load Indexed: arg = unsigned base offset */
/* 0x88 */ { "LDX ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x89 */ { "LDXH ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x8a */ { "LDXB ", UDECIMAL }, /* One 32-bit stack argument */
/* 0x8b */ { "LDXM ", UDECIMAL }, /* Two 32-bit stack argument */
/* Store Indexed: arg = unsigned base offset */
/* 0x8c */ { "STX ", UDECIMAL }, /* Two 32-bit stack argument */
/* 0x8d */ { "STXH ", UDECIMAL }, /* Two 32-bit stack argument */
/* 0x8e */ { "STXB ", UDECIMAL }, /* Two 32-bit stack argument */
/* 0x8f */ { "STXM ", UDECIMAL }, /* Two+n 32-bit stack argument */
/* Program control: arg = unsigned label (One stack argument) */
/* 0x90 */ { "JEQUZ", HEX },
/* 0x91 */ { "JNEQZ", HEX },
/* 0x92 */ { "JLTZ ", HEX },
/* 0x93 */ { "JGTEZ", HEX },
/* 0x94 */ { "JGTZ ", HEX },
/* 0x95 */ { "JLTEZ", HEX },
/* Program control: arg = unsigned label (no stack arguments) */
/* 0x96 */ { "JMP ", HEX },
/* 0x97 */ { "PUSH ", DECIMAL },
/* Program control: arg = unsigned label (One stack argument) */
/* 0x98 */ { "JEQU ", HEX },
/* 0x99 */ { "JNEQ ", HEX },
/* 0x9a */ { "JLT ", HEX },
/* 0x9b */ { "JGTE ", HEX },
/* 0x9c */ { "JGT ", HEX },
/* 0x9d */ { "JLTE ", HEX },
/* 0x9e */ { invOp, SIMPLE },
/* 0x9f */ { "INDS ", DECIMAL },
/* Load: Uses LSP; arg = signed frame offset */
/* 0xa0 */ { "LDS ", DECIMAL }, /* No stack arguments */
/* 0xa1 */ { "LDSH ", DECIMAL }, /* No stack arguments */
/* 0xa2 */ { "LDSB ", DECIMAL }, /* No stack arguments */
/* 0xa3 */ { "LDSM ", DECIMAL }, /* One 32-bit stack argument */
/* Store: Uses LSP; arg = signed frame offset */
/* 0xa4 */ { "STS ", DECIMAL }, /* One 32-bit stack argument */
/* 0xa5 */ { "STSH ", DECIMAL }, /* One 32-bit stack argument */
/* 0xa6 */ { "STSB ", DECIMAL }, /* One 32-bit stack argument */
/* 0xa7 */ { "STSM ", DECIMAL }, /* One+n 32-bit stack argument */
/* Load Indexed: Uses LSP; arg = signed frame offset */
/* 0xa8 */ { "LDSX ", DECIMAL }, /* One 32-bit stack argument */
/* 0xa9 */ { "LDSXH", DECIMAL }, /* One 32-bit stack argument */
/* 0xaa */ { "LDSXB", DECIMAL }, /* One 32-bit stack argument */
/* 0xab */ { "LDSXM", DECIMAL }, /* Two 32-bit stack argument */
/* Store Indexed: Uses LSP; arg = signed frame offset */
/* 0xac */ { "STSX ", DECIMAL }, /* Two 32-bit stack argument */
/* 0xad */ { "STSXH", DECIMAL }, /* Two 32-bit stack argument */
/* 0xae */ { "STSXB", DECIMAL }, /* Two 32-bit stack argument */
/* 0xaf */ { "STSXM", DECIMAL }, /* Two+n 32-bit stack argument */
/* Load address relative to stack base: arg = unsigned offset */
/* 0xb0 */ { "LA ", UDECIMAL },
/* Load address: Uses SLP, arg = signed frame offset */
/* 0xb1 */ { "LAS ", DECIMAL },
/* Load absolute stack address: arg = RODATA offset (No stack arguments) */
/* 0xb2 */ { "LAC ", HEX, },
/* 0xb3 */ { invOp, SIMPLE },
/* Load address relative to stack base: arg = unsigned offset, TOS=index */
/* 0xb4 */ { "LAX ", UDECIMAL },
/* Load address indexed: Uses SLP, arg = signed frame offset */
/* 0xb5 */ { "LASX ", DECIMAL },
/* Set LSP: arg = new level that evaluates to LSP value */
/* 0xb6 */ { "SLSP ", UDECIMAL },
/* 0xb7 */ { "SDC ", UDECIMAL },
/* 0xb8 */ { invOp, SIMPLE },
/* Program Control: Uses LSP; arg = unsigned label (No stack arguments) */
/* 0xb9 */ { "PCAL ", HEX },
/* System calls: arg = file number | sub-function code */
/* 0xba */ { "SYSIO", xOP },
/* System functions: arg = 32-bit library call identifier */
/* 0xbb */ { "LIB ", lbOP },
/* Floating point operations: arg = FP op-code */
/* 0xbc */ { "FLOAT", fpOP },
/* Program control: arg = unsigned label (no stack arguments) */
/* 0xbd */ { NULL, LABEL_DEC },
/* Pseudo-operations: arg = file number OR line number */
/* 0xbe */ { "INCLUDE ", FILENO },
/* 0xbf */ { "LINE ", LINENO },
};
static const char invXOp[] = "Invalid SYSIO";
static const char *xName[MAX_XOP] = { /* SYSIO opcode mnemonics */
/* 0x00 */ invXOp, "EOF", "EOLN", "RESET",
/* 0x04 */ "REWRITE", invXOp, invXOp, invXOp,
/* 0x08 */ invXOp, invXOp, invXOp, invXOp,
/* 0x0c */ invXOp, invXOp, invXOp, invXOp,
/* 0x10 */ "READLN", "READPG", "READBIN", "READINT",
/* 0x14 */ "READCHR", "READSTR", "READRL", invXOp,
/* 0x18 */ invXOp, invXOp, invXOp, invXOp,
/* 0x1c */ invXOp, invXOp, invXOp, invXOp,
/* 0x20 */ "WRITELN", "WRITEPG", "WRITEBIN", "WRITEINT",
/* 0x24 */ "WRITECHR", "WRITESTR", "WRITERL" };
static const char invLbOp[] = "Invalid runtime code";
static const char *lbName[MAX_LBOP] = { /* LIB opcode mnemonics */
/* 0x00 */ "GETENV", "STR2STR", "CSTR2STR", "STR2RSTR",
/* 0x04 */ "CSTR2RSTR", "VAL", "MKSTK", "MKSTKSTR",
/* 0x08 */ "MKSTKC", "STRCAT", "STRCATC", "STRCMP" };
#define MAX_FOP 16
static const char invFpOp[] = "Invalid FP Operation";
static const char *fpName[MAX_FOP] = {
/* 0x00 */ invFpOp, "FLOAT", "TRUNC", "ROUND",
/* 0x04 */ "NEG", "ADD", "SUB", "MUL",
/* 0x08 */ "DIV", "MOD", "EQU", "NEQ",
/* 0x0c */ "LT", "GTE", "GT", "LTE" };
/***********************************************************************/
void insn_DisassemblePCode(FILE* lfile, OPTYPE *pop)
{
const struct optab_s *opTable;
int idx;
/* Select table based upon whether an opcode is included or not */
if (pop->op & o32)
{
opTable = g_sArg32OpTable;
idx = pop->op & ~o32;
}
else
{
opTable = g_sNoArgOpTable;
idx = pop->op;
}
/* Indent, comment or label as appropriate */
switch (opTable[idx].format)
{
case LABEL_DEC :
fprintf(lfile, "L%08lx:\n", pop->arg);
return;
case FILENO :
case LINENO :
fprintf(lfile, "; ");
break;
default :
fprintf(lfile, " ");
} /* end switch */
/* Print the opcode mnemonic */
fprintf(lfile, "%s ", opTable[idx].opName);
/* Print the argument (if present) */
if (pop->op & o32)
{
switch (opTable[idx].format)
{
case HEX :
fprintf(lfile, "0x%08lx", pop->arg);
break;
case FILENO :
case LINENO :
case DECIMAL :
fprintf(lfile, "%ld", (int32_t)pop->arg);
break;
case UDECIMAL :
fprintf(lfile, "%1lu", pop->arg);
break;
case fpOP :
if ((pop->arg & 0x3f) < MAX_FOP)
fprintf(lfile, "%s", fpName[(pop->arg & 0x3f)]);
else
fprintf(lfile, "%s", invFpOp);
break;
case xOP :
{
unsigned fileno = pop->arg >> 16;
unsigned xop = pop->arg & 0xffff;
fprintf(lfile, "%d, ", fileno);
if (xop < MAX_XOP)
fprintf(lfile, "%s", xName[xop]);
else
fprintf(lfile, "%s", invXOp);
}
break;
case lbOP :
if (pop->arg < MAX_LBOP)
fprintf(lfile, "%s", lbName[pop->arg]);
else
fprintf(lfile, "%s", invLbOp);
break;
case LABEL_DEC :
default :
break;
}
}
/* Don't forget the newline! */
fputc('\n', lfile);
} /* end dissassemblePcode */
/***********************************************************************/
