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Disassembler.c
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/* -----------------------------------------------------------------------------
* Bytecode disassembler
*
* Copyright (c) 1994-2002.
*
* $RCSfile: Disassembler.c,v $
* $Revision: 1.29 $
* $Date: 2004/09/03 15:28:19 $
* ---------------------------------------------------------------------------*/
#ifdef DEBUG
#include "PosixSource.h"
#include "Rts.h"
#include "RtsAPI.h"
#include "rts/Bytecodes.h"
#include "RtsUtils.h"
#include "Schedule.h"
#include "Printer.h"
#include "Disassembler.h"
#include "Interpreter.h"
/* --------------------------------------------------------------------------
* Disassembler
* ------------------------------------------------------------------------*/
int
disInstr ( StgBCO *bco, int pc )
{
int i;
StgWord16 instr;
StgWord16* instrs = (StgWord16*)(bco->instrs->payload);
StgArrWords* literal_arr = bco->literals;
StgWord* literals = (StgWord*)(&literal_arr->payload[0]);
StgMutArrPtrs* ptrs_arr = bco->ptrs;
StgPtr* ptrs = (StgPtr*)(&ptrs_arr->payload[0]);
instr = instrs[pc++];
if (instr & bci_FLAG_LARGE_ARGS) {
debugBelch ("LARGE ");
}
#define BCO_NEXT instrs[pc++]
#define BCO_NEXT_32 (pc += 2)
#define BCO_READ_NEXT_32 (BCO_NEXT_32, (((StgWord) instrs[pc-2]) << 16) \
+ ( (StgWord) instrs[pc-1]))
#define BCO_NEXT_64 (pc += 4)
#define BCO_READ_NEXT_64 (BCO_NEXT_64, (((StgWord) instrs[pc-4]) << 48) \
+ (((StgWord) instrs[pc-3]) << 32) \
+ (((StgWord) instrs[pc-2]) << 16) \
+ ( (StgWord) instrs[pc-1]))
#if WORD_SIZE_IN_BITS == 32
#define BCO_NEXT_WORD BCO_NEXT_32
#define BCO_READ_NEXT_WORD BCO_READ_NEXT_32
#elif WORD_SIZE_IN_BITS == 64
#define BCO_NEXT_WORD BCO_NEXT_64
#define BCO_READ_NEXT_WORD BCO_READ_NEXT_64
#else
#error Cannot cope with WORD_SIZE_IN_BITS being nether 32 nor 64
#endif
#define BCO_GET_LARGE_ARG ((instr & bci_FLAG_LARGE_ARGS) ? BCO_READ_NEXT_WORD : BCO_NEXT)
switch (instr & 0xff) {
case bci_BRK_FUN:
debugBelch ("BRK_FUN " ); printPtr( ptrs[instrs[pc]] );
debugBelch (" %d ", instrs[pc+1]); printPtr( ptrs[instrs[pc+2]] ); debugBelch("\n" );
pc += 3;
break;
case bci_SWIZZLE:
debugBelch("SWIZZLE stkoff %d by %d\n",
instrs[pc], (signed int)instrs[pc+1]);
pc += 2; break;
case bci_CCALL:
debugBelch("CCALL marshaller at 0x%" FMT_Word "\n",
literals[instrs[pc]] );
pc += 1; break;
case bci_STKCHECK: {
StgWord stk_words_reqd = BCO_GET_LARGE_ARG + 1;
debugBelch("STKCHECK %" FMT_Word "\n", (W_)stk_words_reqd );
break;
}
case bci_PUSH_L:
debugBelch("PUSH_L %d\n", instrs[pc] );
pc += 1; break;
case bci_PUSH_LL:
debugBelch("PUSH_LL %d %d\n", instrs[pc], instrs[pc+1] );
pc += 2; break;
case bci_PUSH_LLL:
debugBelch("PUSH_LLL %d %d %d\n", instrs[pc], instrs[pc+1],
instrs[pc+2] );
pc += 3; break;
case bci_PUSH_G:
debugBelch("PUSH_G " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n" );
pc += 1; break;
case bci_PUSH_ALTS:
debugBelch("PUSH_ALTS " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_P:
debugBelch("PUSH_ALTS_P " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_N:
debugBelch("PUSH_ALTS_N " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_F:
debugBelch("PUSH_ALTS_F " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_D:
debugBelch("PUSH_ALTS_D " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_L:
debugBelch("PUSH_ALTS_L " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_ALTS_V:
debugBelch("PUSH_ALTS_V " ); printPtr( ptrs[instrs[pc]] );
debugBelch("\n");
pc += 1; break;
case bci_PUSH_UBX:
debugBelch("PUSH_UBX ");
for (i = 0; i < instrs[pc+1]; i++)
debugBelch("0x%" FMT_Word " ", literals[i + instrs[pc]] );
debugBelch("\n");
pc += 2; break;
case bci_PUSH_APPLY_N:
debugBelch("PUSH_APPLY_N\n");
break;
case bci_PUSH_APPLY_V:
debugBelch("PUSH_APPLY_V\n");
break;
case bci_PUSH_APPLY_F:
debugBelch("PUSH_APPLY_F\n");
break;
case bci_PUSH_APPLY_D:
debugBelch("PUSH_APPLY_D\n");
break;
case bci_PUSH_APPLY_L:
debugBelch("PUSH_APPLY_L\n");
break;
case bci_PUSH_APPLY_P:
debugBelch("PUSH_APPLY_P\n");
break;
case bci_PUSH_APPLY_PP:
debugBelch("PUSH_APPLY_PP\n");
break;
case bci_PUSH_APPLY_PPP:
debugBelch("PUSH_APPLY_PPP\n");
break;
case bci_PUSH_APPLY_PPPP:
debugBelch("PUSH_APPLY_PPPP\n");
break;
case bci_PUSH_APPLY_PPPPP:
debugBelch("PUSH_APPLY_PPPPP\n");
break;
case bci_PUSH_APPLY_PPPPPP:
debugBelch("PUSH_APPLY_PPPPPP\n");
break;
case bci_SLIDE:
debugBelch("SLIDE %d down by %d\n", instrs[pc], instrs[pc+1] );
pc += 2; break;
case bci_ALLOC_AP:
debugBelch("ALLOC_AP %d words\n", instrs[pc] );
pc += 1; break;
case bci_ALLOC_AP_NOUPD:
debugBelch("ALLOC_AP_NOUPD %d words\n", instrs[pc] );
pc += 1; break;
case bci_ALLOC_PAP:
debugBelch("ALLOC_PAP %d arity, %d words\n",
instrs[pc], instrs[pc+1] );
pc += 2; break;
case bci_MKAP:
debugBelch("MKAP %d words, %d stkoff\n", instrs[pc+1],
instrs[pc] );
pc += 2; break;
case bci_MKPAP:
debugBelch("MKPAP %d words, %d stkoff\n", instrs[pc+1],
instrs[pc] );
pc += 2; break;
case bci_UNPACK:
debugBelch("UNPACK %d\n", instrs[pc] );
pc += 1; break;
case bci_PACK:
debugBelch("PACK %d words with itbl ", instrs[pc+1] );
printPtr( (StgPtr)literals[instrs[pc]] );
debugBelch("\n");
pc += 2; break;
case bci_TESTLT_I: {
unsigned int discr = BCO_NEXT;
int failto = BCO_GET_LARGE_ARG;
debugBelch("TESTLT_I %" FMT_Int ", fail to %d\n", literals[discr], failto);
break;
}
case bci_TESTEQ_I:
debugBelch("TESTEQ_I %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_F:
debugBelch("TESTLT_F %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_F:
debugBelch("TESTEQ_F %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_D:
debugBelch("TESTLT_D %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_D:
debugBelch("TESTEQ_D %" FMT_Int ", fail to %d\n", literals[instrs[pc]],
instrs[pc+1]);
pc += 2; break;
case bci_TESTLT_P:
debugBelch("TESTLT_P %d, fail to %d\n", instrs[pc],
instrs[pc+1]);
pc += 2; break;
case bci_TESTEQ_P:
debugBelch("TESTEQ_P %d, fail to %d\n", instrs[pc],
instrs[pc+1]);
pc += 2; break;
case bci_CASEFAIL:
debugBelch("CASEFAIL\n" );
break;
case bci_JMP:
debugBelch("JMP to %d\n", instrs[pc]);
pc += 1; break;
case bci_ENTER:
debugBelch("ENTER\n");
break;
case bci_RETURN:
debugBelch("RETURN\n" );
break;
case bci_RETURN_P:
debugBelch("RETURN_P\n" );
break;
case bci_RETURN_N:
debugBelch("RETURN_N\n" );
break;
case bci_RETURN_F:
debugBelch("RETURN_F\n" );
break;
case bci_RETURN_D:
debugBelch("RETURN_D\n" );
break;
case bci_RETURN_L:
debugBelch("RETURN_L\n" );
break;
case bci_RETURN_V:
debugBelch("RETURN_V\n" );
break;
default:
barf("disInstr: unknown opcode %u", (unsigned int) instr);
}
return pc;
}
/* Something of a kludge .. how do we know where the end of the insn
array is, since it isn't recorded anywhere? Answer: the first
short is the number of bytecodes which follow it.
See ByteCodeGen.linkBCO.insns_arr for construction ...
*/
void disassemble( StgBCO *bco )
{
nat i, j;
StgWord16* instrs = (StgWord16*)(bco->instrs->payload);
StgMutArrPtrs* ptrs = bco->ptrs;
nat nbcs = (int)(bco->instrs->bytes / sizeof(StgWord16));
nat pc = 1;
debugBelch("BCO\n" );
pc = 0;
while (pc < nbcs) {
debugBelch("\t%2d: ", pc );
pc = disInstr ( bco, pc );
}
debugBelch("INSTRS:\n " );
j = 16;
for (i = 0; i < nbcs; i++) {
debugBelch("%3d ", (int)instrs[i] );
j--;
if (j == 0) { j = 16; debugBelch("\n "); };
}
debugBelch("\n");
debugBelch("PTRS:\n " );
j = 8;
for (i = 0; i < ptrs->ptrs; i++) {
debugBelch("%8p ", ptrs->payload[i] );
j--;
if (j == 0) { j = 8; debugBelch("\n "); };
}
debugBelch("\n");
debugBelch("\n");
}
#endif /* DEBUG */