2 /* -----------------------------------------------------------------------------
3 * Bytecode disassembler
5 * Copyright (c) 1994-1998.
7 * $RCSfile: Disassembler.c,v $
9 * $Date: 2001/08/02 17:01:33 $
10 * ---------------------------------------------------------------------------*/
21 #include "Bytecodes.h"
23 #include "Disassembler.h"
24 #include "Interpreter.h"
26 /* --------------------------------------------------------------------------
28 * ------------------------------------------------------------------------*/
30 int disInstr ( StgBCO *bco, int pc )
34 StgArrWords* instr_arr = bco->instrs;
35 UShort* instrs = (UShort*)(&instr_arr->payload[0]);
37 StgArrWords* literal_arr = bco->literals;
38 StgWord* literals = (StgWord*)(&literal_arr->payload[0]);
40 StgMutArrPtrs* ptrs_arr = bco->ptrs;
41 StgPtr* ptrs = (StgPtr*)(&ptrs_arr->payload[0]);
43 StgArrWords* itbls_arr = bco->itbls;
44 StgInfoTable** itbls = (StgInfoTable**)(&itbls_arr->payload[0]);
46 switch (instrs[pc++]) {
48 fprintf(stderr, "CCALL marshaller at 0x%x\n",
49 literals[instrs[pc+1]] );
52 fprintf(stderr, "STKCHECK %d\n", instrs[pc] );
55 fprintf(stderr, "ARGCHECK %d\n", instrs[pc] );
58 fprintf(stderr, "PUSH_L %d\n", instrs[pc] );
61 fprintf(stderr, "PUSH_LL %d %d\n", instrs[pc], instrs[pc+1] );
64 fprintf(stderr, "PUSH_LLL %d %d %d\n", instrs[pc], instrs[pc+1],
68 fprintf(stderr, "PUSH_G " ); printPtr( ptrs[instrs[pc]] );
69 fprintf(stderr, "\n" );
72 fprintf(stderr, "PUSH_AS " ); printPtr( ptrs[instrs[pc]] );
73 fprintf(stderr, " 0x%x", literals[instrs[pc+1]] );
74 fprintf(stderr, "\n");
77 fprintf(stderr, "PUSH_UBX ");
78 for (i = 0; i < instrs[pc+1]; i++)
79 fprintf(stderr, "0x%x ", literals[i + instrs[pc]] );
80 fprintf(stderr, "\n");
83 fprintf(stderr, "PUSH_TAG %d\n", instrs[pc] );
86 fprintf(stderr, "SLIDE %d down by %d\n", instrs[pc], instrs[pc+1] );
89 fprintf(stderr, "ALLOC %d words\n", instrs[pc] );
92 fprintf(stderr, "MKAP %d words, %d stkoff\n", instrs[pc+1],
96 fprintf(stderr, "UNPACK %d\n", instrs[pc] );
99 fprintf(stderr, "UPK_TAG %d words, %d conoff, %d stkoff\n",
100 instrs[pc], instrs[pc+1], instrs[pc+2] );
103 fprintf(stderr, "PACK %d words with itbl ", instrs[pc+1] );
104 printPtr( (StgPtr)itbls[instrs[pc]] );
105 fprintf(stderr, "\n");
109 fprintf(stderr, "CASEFAIL\n" );
112 fprintf(stderr, "JMP to %d\n", instrs[pc]);
116 fprintf(stderr, "TESTLT_I %d, fail to %d\n", literals[instrs[pc]],
120 fprintf(stderr, "TESTEQ_I %d, fail to %d\n", literals[instrs[pc]],
125 fprintf(stderr, "TESTLT_F %d, fail to %d\n", literals[instrs[pc]],
129 fprintf(stderr, "TESTEQ_F %d, fail to %d\n", literals[instrs[pc]],
134 fprintf(stderr, "TESTLT_D %d, fail to %d\n", literals[instrs[pc]],
138 fprintf(stderr, "TESTEQ_D %d, fail to %d\n", literals[instrs[pc]],
143 fprintf(stderr, "TESTLT_P %d, fail to %d\n", instrs[pc],
147 fprintf(stderr, "TESTEQ_P %d, fail to %d\n", instrs[pc],
151 fprintf(stderr, "RETURN " ); printPtr( (StgPtr)itbls[instrs[pc]] );
152 fprintf(stderr, "\n");
155 fprintf(stderr, "ENTER\n");
158 barf("disInstr: unknown opcode");
164 /* Something of a kludge .. how do we know where the end of the insn
165 array is, since it isn't recorded anywhere? Answer: the first
166 short is the number of bytecodes which follow it.
167 See ByteCodeGen.linkBCO.insns_arr for construction ...
169 void disassemble( StgBCO *bco )
172 StgArrWords* instr_arr = bco->instrs;
173 UShort* instrs = (UShort*)(&instr_arr->payload[0]);
174 StgMutArrPtrs* ptrs = bco->ptrs;
175 nat nbcs = (int)instrs[0];
178 fprintf(stderr, "BCO\n" );
181 fprintf(stderr, "\t%2d: ", pc );
182 pc = disInstr ( bco, pc );
185 fprintf(stderr, "INSTRS:\n " );
187 for (i = 0; i < nbcs; i++) {
188 fprintf(stderr, "%3d ", (int)instrs[i] );
190 if (j == 0) { j = 16; fprintf(stderr, "\n "); };
192 fprintf(stderr, "\n");
194 fprintf(stderr, "PTRS:\n " );
196 for (i = 0; i < ptrs->ptrs; i++) {
197 fprintf(stderr, "%8p ", ptrs->payload[i] );
199 if (j == 0) { j = 8; fprintf(stderr, "\n "); };
201 fprintf(stderr, "\n");
203 fprintf(stderr, "\n");
204 ASSERT(pc == nbcs+1);