3 Routines for handling Flash2 AVM2 ABC Actionscript
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2008 Matthias Kramm <kramm@quiss.org>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
29 #define OP_STACK_ARGS 2
37 #define OP_LOOKUPSWITCH 512
38 #define OP_NEED_ACTIVATION 1024
39 #define OP_STACK_ARGS2 2048
41 /* 2 = u30 index into multiname
42 m = u30 index into method
43 n = u30 number of params
44 i = u30 index into method info
46 c = u30 index into class
47 s = string (u30 index into strings)
54 {0xa0, "add", "", -2, 1, 0, 0},
55 {0xc5, "add_i", "", -2, 1, 0, 0},
56 {0x86, "astype", "2", -1, 1, 0, 0},
57 {0x87, "astypelate", "", -2, 1, 0, 0},
58 {0xA8, "bitand", "", -2, 1, 0, 0},
59 {0x97, "bitnot", "", -1, 1, 0, 0},
60 {0xa9, "bitor", "", -2, 1, 0, 0},
61 {0xaa, "bitxor", "", -2, 1, 0, 0},
62 {0x41, "call", "n", -2, 1, 0, OP_STACK_ARGS},
63 {0x43, "callmethod", "mn", -1, 1, 0, OP_STACK_ARGS},
64 {0x4c, "callproplex", "2n", -1, 1, 0, OP_STACK_ARGS|OP_STACK_NS},
65 {0x46, "callproperty", "2n", -1, 1, 0, OP_STACK_ARGS|OP_STACK_NS},
66 {0x4f, "callpropvoid", "2n", -1, 0, 0, OP_STACK_ARGS|OP_STACK_NS},
67 {0x44, "callstatic", "in", -1, 1, 0, OP_STACK_ARGS},
68 {0x45, "callsuper", "2n", -1, 1, 0, OP_STACK_ARGS|OP_STACK_NS},
69 {0x4e, "callsupervoid", "2n", -1, 0, 0, OP_STACK_ARGS|OP_STACK_NS},
70 {0x78, "checkfilter", "", -1, 1, 0, 0},
71 {0x80, "coerce", "2", -1, 1, 0, 0},
72 {0x82, "coerce_a", "", -1, 1, 0, 0},
73 {0x85, "coerce_s", "", -1, 1, 0, 0},
74 {0x42, "construct", "n", -1, 1, 0, OP_STACK_ARGS},
75 {0x4a, "constructprop", "2n", -1, 1, 0, OP_STACK_ARGS|OP_STACK_NS},
76 {0x49, "constructsuper", "n", -1, 0, 0, OP_STACK_ARGS},
77 {0x76, "convert_b", "", -1, 1, 0, 0},
78 {0x73, "convert_i", "", -1, 1, 0, 0},
79 {0x75, "convert_d", "", -1, 1, 0, 0},
80 {0x77, "convert_o", "", -1, 1, 0, 0},
81 {0x74, "convert_u", "", -1, 1, 0, 0},
82 {0x70, "convert_s", "", -1, 1, 0, 0},
83 {0xef, "debug", "D", 0, 0, 0, 0},
84 {0xf1, "debugfile", "s", 0, 0, 0, 0},
85 {0xf0, "debugline", "u", 0, 0, 0, 0},
86 {0x94, "declocal", "r", 0, 0, 0, OP_REGISTER},
87 {0xc3, "declocal_i", "r", 0, 0, 0, OP_REGISTER},
88 {0x93, "decrement", "", -1, 1, 0, 0},
89 {0xc1, "decrement_i", "", -1, 1, 0, 0},
90 {0x6a, "deleteproperty", "2", -1, 1, 0, OP_STACK_NS},
91 {0xa3, "divide", "", -2, 1, 0, 0},
92 {0x2a, "dup", "", -1, 2, 0, 0},
93 {0x06, "dxns", "s", 0, 0, 0, OP_SET_DXNS},
94 {0x07, "dxnslate", "", -1, 0, 0, OP_SET_DXNS},
95 {0xab, "equals", "", -2, 1, 0, 0},
96 {0x72, "esc_xattr", "", -1, 1, 0, 0},
97 {0x71, "esc_xelem", "", -1, 1, 0, 0},
98 {0x5e, "findproperty", "2", 0, 1, 0, OP_STACK_NS},
99 {0x5d, "findpropstrict", "2", 0, 1, 0, OP_STACK_NS},
100 {0x59, "getdescendants", "2", -1, 1, 0, OP_STACK_NS},
101 {0x64, "getglobalscope", "", 0, 1, 0, 0},
102 {0x6e, "getglobalslot", "u", 0, 1, 0, 0},
103 {0x60, "getlex", "2", 0, 1, 0, 0}, //multiname may not be runtime
104 {0x62, "getlocal", "r", 0, 1, 0, OP_REGISTER},
105 {0xd0, "getlocal_0", "", 0, 1, 0, OP_REGISTER},
106 {0xd1, "getlocal_1", "", 0, 1, 0, OP_REGISTER},
107 {0xd2, "getlocal_2", "", 0, 1, 0, OP_REGISTER},
108 {0xd3, "getlocal_3", "", 0, 1, 0, OP_REGISTER},
109 {0x66, "getproperty", "2", -1, 1, 0, OP_STACK_NS},
110 {0x65, "getscopeobject", "u", 0, 1, 0, 0}, // u = index into scope stack
111 {0x6c, "getslot", "u", -1, 1, 0, 0},
112 {0x04, "getsuper", "2", -1, 1, 0, OP_STACK_NS},
113 {0xaf, "greaterthan", "", -2, 1, 0, 0},
114 {0xb0, "greaterequals", "", -2, 1, 0, 0},
115 {0x1f, "hasnext", "", -2, 1, 0, 0},
116 {0x32, "hasnext2", "rr", 0, 1, 0, OP_REGISTER},
117 {0x13, "ifeq", "j", -2, 0, 0, OP_BRANCH},
118 {0x12, "iffalse", "j", -1, 0, 0, OP_BRANCH},
119 {0x18, "ifge", "j", -2, 0, 0, OP_BRANCH},
120 {0x17, "ifgt", "j", -2, 0, 0, OP_BRANCH},
121 {0x16, "ifle", "j", -2, 0, 0, OP_BRANCH},
122 {0x15, "iflt", "j", -2, 0, 0, OP_BRANCH},
123 {0x0f, "ifnge", "j", -2, 0, 0, OP_BRANCH},
124 {0x0e, "ifngt", "j", -2, 0, 0, OP_BRANCH},
125 {0x0d, "ifnle", "j", -2, 0, 0, OP_BRANCH},
126 {0x0c, "ifnlt", "j", -2, 0, 0, OP_BRANCH},
127 {0x14, "ifne", "j", -2, 0, 0, OP_BRANCH},
128 {0x19, "ifstricteq", "j", -2, 0, 0, OP_BRANCH},
129 {0x1a, "ifstrictne", "j", -2, 0, 0, OP_BRANCH},
130 {0x11, "iftrue", "j", -1, 0, 0, OP_BRANCH},
131 {0xb4, "in", "", -2, 1, 0, 0},
132 {0x92, "inclocal", "r", 0, 0, 0, OP_REGISTER},
133 {0xc2, "inclocal_i", "r", 0, 0, 0, OP_REGISTER},
134 {0x91, "increment", "", -1, 1, 0, 0},
135 {0xc0, "increment_i", "", -1, 1, 0, 0},
136 {0x68, "initproperty", "2", -2, 0, 0, OP_STACK_NS},
137 {0xb1, "instanceof", "", -2, 1, 0, 0},
138 {0xb2, "istype", "2", -1, 1, 0, 0}, // may not be a runtime multiname
139 {0xb3, "istypelate", "", -2, 1, 0, 0},
140 {0x10, "jump", "j", 0, 0, 0, OP_JUMP},
141 {0x08, "kill", "r", 0, 0, 0, OP_REGISTER},
142 {0x09, "label", "", 0, 0, 0, OP_LABEL},
143 {0xae, "lessequals", "", -2, 1, 0, 0},
144 {0xad, "lessthan", "", -2, 1, 0, 0},
145 {0x1b, "lookupswitch", "S", -1, 0, 0, OP_LOOKUPSWITCH},
146 {0xa5, "lshift", "", -2, 1, 0, 0},
147 {0xa4, "modulo", "", -2, 1, 0, 0},
148 {0xa2, "multiply", "", -2, 1, 0, 0},
149 {0xc7, "multiply_i", "", -2, 1, 0, 0},
150 {0x90, "negate", "", -1, 1, 0, 0},
151 {0xc4, "negate_i", "", -1, 1, 0, 0},
152 {0x57, "newactivation", "", 0, 1, 0, OP_NEED_ACTIVATION},
153 {0x56, "newarray", "n", 0, 1, 0, OP_STACK_ARGS},
154 {0x5a, "newcatch", "u", 0, 1, 0, 0}, //u = index into exception_info
155 {0x58, "newclass", "c", -1, 1, 0, 0}, //c = index into class_info
156 {0x40, "newfunction", "m", 0, 1, 0, 0}, //i = index into method_info
157 {0x55, "newobject", "n", 0, 1, 0, OP_STACK_ARGS2},
158 {0x1e, "nextname", "", -2, 1, 0, 0},
159 {0x23, "nextvalue", "", -2, 1, 0, 0},
160 {0x02, "nop", "", 0, 0, 0, 0},
161 {0x96, "not", "", -1, 1, 0 ,0},
162 {0x29, "pop", "", -1, 0, 0, 0},
163 {0x1d, "popscope", "", 0, 0,-1, 0},
164 {0x24, "pushbyte", "b", 0, 1, 0, 0},
165 {0x2f, "pushdouble", "f", 0, 1, 0, 0}, //index into floats
166 {0x27, "pushfalse", "", 0, 1, 0, 0},
167 {0x2d, "pushint", "I", 0, 1, 0, 0}, //index into ints
168 {0x31, "pushnamespace", "u", 0, 1, 0, 0}, //index into namespace TODO
169 {0x28, "pushnan", "", 0, 1, 0, 0},
170 {0x20, "pushnull", "", 0, 1, 0, 0},
171 {0x30, "pushscope", "", -1, 0, 1, 0},
172 {0x25, "pushshort", "u", 0, 1, 0, 0},
173 {0x2c, "pushstring", "s", 0, 1, 0, 0},
174 {0x26, "pushtrue", "", 0, 1, 0, 0},
175 {0x2e, "pushuint", "U", 0, 1, 0, 0}, //index into uints
176 {0x21, "pushundefined", "", 0, 1, 0, 0},
177 {0x1c, "pushwith", "", -1, 0, 1, 0},
178 {0x48, "returnvalue", "", -1, 0, 0, OP_RETURN},
179 {0x47, "returnvoid", "", 0, 0, 0, OP_RETURN},
180 {0xa6, "rshift", "", -2, 1, 0, 0},
181 {0x63, "setlocal", "r", -1, 0, 0, OP_REGISTER},
182 {0xd4, "setlocal_0", "", -1, 0, 0, OP_REGISTER},
183 {0xd5, "setlocal_1", "", -1, 0, 0, OP_REGISTER},
184 {0xd6, "setlocal_2", "", -1, 0, 0, OP_REGISTER},
185 {0xd7, "setlocal_3", "", -1, 0, 0, OP_REGISTER},
186 {0x6f, "setglobalslot", "u", -1, 0, 0, 0},
187 {0x61, "setproperty", "2", -2, 0, 0, OP_STACK_NS},
188 {0x6d, "setslot", "u", -2, 0, 0, 0},
189 {0x05, "setsuper", "2", -2, 0, 0, OP_STACK_NS},
190 {0xac, "strictequals", "", -2, 1, 0, 0},
191 {0xa1, "subtract", "", -2, 1, 0, 0},
192 {0xc6, "subtract_i", "", -2, 1, 0, 0},
193 {0x2b, "swap", "", -2, 2, 0, 0},
194 {0x03, "throw", "", -1, 0, 0, OP_THROW},
195 {0x95, "typeof", "", -1, 1, 0, 0},
196 {0xa7, "urshift", "", -2, 1, 0, 0},
198 /* opcodes not documented, but seen in the wild */
199 //0x53: seen in builtin.abc
200 {0x53, "applytype", "n", -1, 1, 0, OP_STACK_ARGS},
202 /* dummy instruction. Warning: this one is not actually supported by flash */
203 {0xfe, "__continue__", "s", 0, 0, 0, OP_RETURN},
204 {0xff, "__break__", "s", 0, 0, 0, OP_RETURN},
207 static U8 op2index[256] = {254};
209 opcode_t* opcode_get(U8 op)
212 if(op2index[0]==254) {
213 memset(op2index, 255, sizeof(op2index));
214 for(t=0;t<sizeof(opcodes)/sizeof(opcodes[0]);t++) {
215 op2index[opcodes[t].opcode] = t;
218 if(op2index[op]!=255)
219 return &opcodes[op2index[op]];
223 static code_t*pos2code(code_t**bytepos, code_t*c, int pos, int len)
230 (pos!=len && !bytepos[pos])) {
231 /* flex likes to generate these. yuck. */
233 opcode_t*op = opcode_get(c->opcode);
234 fprintf(stderr, "Warning: Invalid jump instruction \"%s\" from %d to %d (%d)\n", op->name, c->pos, pos, len);
236 fprintf(stderr, "Warning: Invalid jump to %d (%d)\n", pos, len);
241 //opcode_t*op = opcode_get(c->opcode);
242 //fprintf(stderr, "Warning: jump beyond end of code in instruction %s at position %d\n", op->name, c->pos);
249 code_t* code_atposition(codelookup_t*l, int pos)
251 return pos2code(l->bytepos, 0, pos, l->len);
254 void lookupswitch_print(lookupswitch_t*l)
256 printf("default: %08x\n", l->def);
257 code_list_t*t = l->targets;
259 printf("target: %08x\n", t->code);
264 code_t*code_parse(TAG*tag, int len, abc_file_t*file, pool_t*pool, codelookup_t**codelookup)
269 int end=tag->pos+len;
270 //printf("-->\n");fflush(stdout);
272 code_t**bytepos = rfx_calloc(sizeof(code_t*)*len);
274 while(tag->pos<end) {
275 int codepos = tag->pos-start;
276 U8 opcode = swf_GetU8(tag);
277 opcode_t*op = opcode_get(opcode);
279 fprintf(stderr, "Can't parse opcode %02x\n", opcode);
282 //printf("%s\n", op->name);fflush(stdout);
286 bytepos[codepos] = c;
301 if(*p == 'n') { // number
302 data = (void*)(ptroff_t)swf_GetU30(tag);
303 } else if(*p == '2') { //multiname
304 data = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
305 } else if(*p == 'U') { //uint
306 data = (void*)(ptroff_t)pool_lookup_uint(pool, swf_GetU30(tag));
307 } else if(*p == 'I') { //int
308 data = (void*)(ptroff_t)pool_lookup_int(pool, swf_GetU30(tag));
309 } else if(*p == 'f') { //int
310 double*fp = malloc(sizeof(double));
311 *fp = pool_lookup_float(pool, swf_GetU30(tag));
313 } else if(*p == 'm') { //method
314 data = array_getvalue(file->methods, swf_GetU30(tag));
315 } else if(*p == 'c') { //classinfo
316 data = array_getvalue(file->classes, swf_GetU30(tag));
317 } else if(*p == 'i') {
318 data = array_getvalue(file->method_bodies, swf_GetU30(tag));
319 } else if(*p == 'u') { // generic integer
320 data = (void*)(ptroff_t)swf_GetU30(tag);
321 } else if(*p == 'r') { // local register
322 data = (void*)(ptroff_t)swf_GetU30(tag);
323 } else if(*p == 'b') { // byte
324 data = (void*)(ptroff_t)swf_GetU8(tag);
325 } else if(*p == 'j') { // jump
326 int j = swf_GetS24(tag);
327 data = (void*)(ptroff_t)j;
328 } else if(*p == 's') { // string
329 string_t s = pool_lookup_string2(pool, swf_GetU30(tag));
330 data = string_dup3(&s);
331 } else if(*p == 'D') { // debug
333 U8 type = swf_GetU8(tag);
335 fprintf(stderr, "Unknown debug type: %02x\n", type);
337 code->data[0] = strdup((char*)pool_lookup_string(pool, swf_GetU30(tag)));
339 code->data[1] = (void*)(ptroff_t)swf_GetU8(tag);
342 } else if(*p == 'S') { // switch statement
343 lookupswitch_t*l = malloc(sizeof(lookupswitch_t));
344 l->def = (code_t*)(ptroff_t)swf_GetS24(tag);
345 l->targets = list_new();
346 int num = swf_GetU30(tag)+1;
349 list_append(l->targets, (code_t*)(ptroff_t)swf_GetS24(tag));
352 printf("Can't parse opcode param type \"%c\" (for op %02x %s).\n", *p, code->opcode, op->name);
356 code->data[pos++] = data;
361 //#define DEBUG_BYTES
365 code_t*c = bytepos[t];
367 opcode_t*op = opcode_get(c->opcode);
368 if(op->flags & (OP_JUMP|OP_BRANCH)) {
369 printf("%5d) %02x %s %d\n", t, tag->data[start+t], op->name, c->data[0]);
371 printf("%5d) %02x %s\n", t, tag->data[start+t], op->name);
374 printf("%5d) %02x\n", t, tag->data[start+t]);
377 //printf("%5d) %02x\n", t, tag->data[start+t]);
382 opcode_t*op = opcode_get(c->opcode);
383 if(op->flags & (OP_JUMP|OP_BRANCH)) {
384 int j = ((int)(ptroff_t)c->data[0]);
385 c->branch = pos2code(bytepos,c,j+4,len);
386 } else if(op->flags & (OP_LOOKUPSWITCH)) {
387 lookupswitch_t*l = (lookupswitch_t*)c->data[0];
389 l->def = pos2code(bytepos,c,(ptroff_t)l->def+offset,len);
390 code_list_t*t=l->targets;
392 t->code = pos2code(bytepos,c,(ptroff_t)t->code+offset,len);
400 (*codelookup) = malloc(sizeof(codelookup_t));
401 (*codelookup)->bytepos = bytepos;
402 (*codelookup)->len = len;
410 void codelookup_free(codelookup_t*codelookup)
412 free(codelookup->bytepos);codelookup->bytepos=0;
416 code_t*code_find_start(code_t*c)
423 void code_free(code_t*c)
425 c = code_find_start(c);
427 code_t*next = c->next;
428 opcode_t*op = opcode_get(c->opcode);
429 char*p = op?op->params:"";
432 void*data = c->data[pos];
433 if(*p == '2') { //multiname
434 multiname_destroy(data);
435 } else if(strchr("sDf", *p)) {
437 } else if(strchr("S", *p)) {
438 lookupswitch_t*l = (lookupswitch_t*)data;
439 list_free(l->targets);l->targets=0;
445 memset(c, 0, sizeof(c));
451 static int opcode_write(TAG*tag, code_t*c, pool_t*pool, abc_file_t*file, int length)
453 opcode_t*op = opcode_get(c->opcode);
459 swf_SetU8(tag, c->opcode);
463 void*data = c->data[pos++];
465 if(*p == 'n') { // number
466 len += swf_SetU30(tag, (ptroff_t)data);
467 } else if(*p == '2') { //multiname
468 multiname_t*m = (multiname_t*)data;
469 len += swf_SetU30(tag, pool_register_multiname(pool, m));
470 } else if(*p == 'm') { //method
471 abc_method_t*m = (abc_method_t*)data;
472 len += swf_SetU30(tag, m->index);
473 } else if(*p == 'c') { //classinfo
474 abc_class_t*cls = (abc_class_t*)data;
475 len += swf_SetU30(tag, cls->index);
476 } else if(*p == 'i') { //methodbody
477 abc_method_body_t*m = (abc_method_body_t*)data;
478 len += swf_SetU30(tag, m->index);
479 } else if(*p == 'I') { // int
480 len += swf_SetU30(tag, pool_register_int(pool, (ptroff_t)data));
481 } else if(*p == 'U') { // uint
482 len += swf_SetU30(tag, pool_register_uint(pool, (ptroff_t)data));
483 } else if(*p == 'f') { // float
484 len += swf_SetU30(tag, pool_register_float(pool, *(double*)data));
485 } else if(*p == 'u') { // integer
486 len += swf_SetU30(tag, (ptroff_t)data);
487 } else if(*p == 'r') { // integer
488 len += swf_SetU30(tag, (ptroff_t)data);
489 } else if(*p == 'b') { // byte
491 swf_SetU8(tag, (ptroff_t)data);
493 } else if(*p == 'j') { // jump
494 int skip = length-c->pos-4;
496 skip = (c->branch->pos) - c->pos - 4;
497 len += swf_SetS24(tag, skip);
498 } else if(*p == 's') { // string
499 int index = pool_register_string2(pool, (string_t*)data);
500 len += swf_SetU30(tag, index);
501 } else if(*p == 'D') { // debug statement
505 len+=swf_SetU30(tag, pool_register_string(pool,c->data[0]));
507 swf_SetU8(tag, (ptroff_t)c->data[1]);
509 len+=swf_SetU30(tag, 0);
510 } else if(*p == 'S') { // switch statement
511 lookupswitch_t*l = (lookupswitch_t*)data;
513 len+=swf_SetS24(tag, l->def->pos-c->pos+offset); //default
514 code_list_t*t = l->targets;
516 len+=swf_SetU30(tag, list_length(t)-1); //nr-1
517 code_list_t*t = l->targets;
519 len+=swf_SetS24(tag, t->code->pos - c->pos+offset);
523 len+=swf_SetU30(tag, 0); //nr-1
524 len+=swf_SetS24(tag, l->def->pos-c->pos+offset);
527 printf("Can't parse opcode param type \"%c\"\n", *p);
534 void code_write(TAG*tag, code_t*code, pool_t*pool, abc_file_t*file)
536 code = code_find_start(code);
542 pos += opcode_write(0, c, pool, file, 0);
546 swf_SetU30(tag, pos);
547 int start = tag->len;
551 opcode_t*op = opcode_get(code->opcode);
552 if(op->flags&(OP_BRANCH|OP_JUMP)) {
555 pos += opcode_write(tag, c, pool, file, length);
558 assert(tag->len - start == pos);
578 static int stack_minus(code_t*c)
580 opcode_t*op = opcode_get(c->opcode);
581 if(op->stack_minus>0) {
582 fprintf(stderr, "Invalid opcode entry %02x %s\n", c->opcode, op->name);
584 int stack = op->stack_minus;
585 if(op->flags&OP_STACK_NS) {
586 multiname_t*m = (multiname_t*)c->data[0];
587 if(multiname_late_namespace(m))
589 if(multiname_late_name(m))
592 if(op->flags&OP_STACK_ARGS || op->flags&OP_STACK_ARGS2) {
593 assert(strchr(op->params, 'n'));
594 int nr = (ptroff_t)(op->params[0]=='n'?c->data[0]:c->data[1]);
596 if(op->flags&OP_STACK_ARGS2)
601 static void handleregister(currentstats_t*stats, int reg)
603 if(reg+1 > stats->maxlocal)
604 stats->maxlocal = reg+1;
610 static void dumpstack(currentstats_t*stats)
613 for(t=0;t<stats->num;t++) {
614 code_t*c = stats->stack[t].code;
615 opcode_t*op = opcode_get(c->opcode);
616 printf("%5d) %c %d:%d %s", t, (stats->stack[t].flags&FLAG_SEEN)?'x':'|',
617 stats->stack[t].stackpos,
618 stats->stack[t].scopepos,
621 if(op->flags&(OP_BRANCH|OP_JUMP)) {
623 printf(" ->%d\n", c->branch->pos);
625 printf(" 00000000\n");
627 if(op->params[0]=='2') {
628 printf(" %s", multiname_tostring(c->data[0]));
634 static char callcode(currentstats_t*stats, int pos, int stack, int scope)
636 while(pos<stats->num) {
637 if(stats->stack[pos].flags&FLAG_SEEN) {
638 if(stats->stack[pos].stackpos != stack ||
639 stats->stack[pos].scopepos != scope) {
641 stats->stack[pos].flags |= FLAG_ERROR;
642 fprintf(stderr, "Stack mismatch at pos %d\n", pos);
643 fprintf(stderr, "Should be: %d:%d, is: %d:%d\n", stack, scope,
644 stats->stack[pos].stackpos, stats->stack[pos].scopepos);
646 /* return error here if we do verification */
652 stats->stack[pos].flags |= FLAG_SEEN;
653 stats->stack[pos].stackpos = stack;
654 stats->stack[pos].scopepos = scope;
656 code_t*c = stats->stack[pos].code;
657 opcode_t*op = opcode_get(c->opcode);
659 //printf("Walking %s at position %d, stack=%d, scope=%d\n", op->name, pos, stack, scope);
661 stack += stack_minus(c);
664 stats->stack[pos].flags |= FLAG_ERROR;
665 fprintf(stderr, "error: stack underflow at %d (%s)\n", pos, op->name);
667 /* if we would do true verification (if we would be a vm), this is
668 where we would return the error
673 stack += op->stack_plus;
674 scope += op->scope_stack_plus;
676 if(stack > stats->maxstack)
677 stats->maxstack = stack;
678 if(scope > stats->maxscope)
679 stats->maxscope = scope;
681 if(op->flags & OP_SET_DXNS)
682 stats->flags |= FLAGS_SET_DXNS;
683 if(op->flags & OP_NEED_ACTIVATION)
684 stats->flags |= FLAGS_ACTIVATION;
686 if(c->opcode == OPCODE_NEWCLASS) {
687 abc_class_t*cls = (abc_class_t*)(c->data[0]);
688 if(scope > cls->init_scope_depth)
689 cls->init_scope_depth = scope;
691 if(c->opcode == OPCODE_NEWFUNCTION) {
692 abc_method_t*m = (abc_method_t*)(c->data[0]);
693 if(m->body && scope > m->body->init_scope_depth)
694 m->body->init_scope_depth = scope;
697 if(op->flags & OP_REGISTER) {
703 handleregister(stats, (ptroff_t)c->data[pos]);
709 handleregister(stats, c->opcode&3);
712 if(op->flags&OP_RETURN) {
713 if(OP_RETURN==0x48/*returnvalue*/) {
715 stats->stack[pos].flags |= FLAG_ERROR;
716 fprintf(stderr, "return(value) with stackposition %d\n", stack);
718 } else if(OP_RETURN==0x47) {
720 stats->stack[pos].flags |= FLAG_ERROR;
721 fprintf(stderr, "return(void) with stackposition %d\n", stack);
725 if(op->flags & (OP_THROW|OP_RETURN))
727 if(op->flags & OP_JUMP) {
729 stats->stack[pos].flags |= FLAG_ERROR;
730 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d.\n", op->name, pos);
737 if(op->flags & OP_BRANCH) {
739 stats->stack[pos].flags |= FLAG_ERROR;
740 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
743 int newpos = c->branch->pos;
744 if(!callcode(stats, newpos, stack, scope))
747 if(op->flags & OP_LOOKUPSWITCH) {
748 lookupswitch_t*l = c->data[0];
750 stats->stack[pos].flags |= FLAG_ERROR;
751 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
754 if(!callcode(stats, l->def->pos, stack, scope))
756 code_list_t*t = l->targets;
759 stats->stack[pos].flags |= FLAG_ERROR;
760 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
763 if(!callcode(stats, t->code->pos, stack, scope))
771 assert(c->next == stats->stack[pos].code);
777 static currentstats_t* code_get_stats(code_t*code, abc_exception_list_t*exceptions)
779 code = code_find_start(code);
786 currentstats_t* current = malloc(sizeof(currentstats_t));
787 current->stack = rfx_calloc(sizeof(stackpos_t)*num);
788 current->maxlocal = 0;
789 current->maxstack = 0;
790 current->maxscope = 0;
794 //#define DEBUG_BYTES
799 opcode_t*op = opcode_get(c->opcode);
800 if(op->flags & (OP_JUMP|OP_BRANCH)) {
801 printf("%5d) %s %08x\n", t, op->name, c->branch);
802 } else if(op->params[0]=='2') {
803 printf("%5d) %s %s\n", t, op->name, multiname_tostring(c->data[0]));
805 printf("%5d) %s\n", t, op->name);
809 //printf("%5d) %02x\n", t, tag->data[start+t]);
816 current->stack[num].code = c;
822 if(!callcode(current, 0, 0, 0)) {
826 abc_exception_list_t*e = exceptions;
828 if(e->abc_exception->target)
829 callcode(current, e->abc_exception->target->pos, 1, 0);
836 void stats_free(currentstats_t*stats)
839 free(stats->stack);stats->stack=0;
844 int code_dump(code_t*c, abc_exception_list_t*exceptions, abc_file_t*file, char*prefix, FILE*fo)
846 abc_exception_list_t*e = exceptions;
847 c = code_find_start(c);
848 currentstats_t*stats = code_get_stats(c, exceptions);
852 U8 opcode = c->opcode;
854 opcode_t*op = opcode_get(opcode);
858 if(c==e->abc_exception->from)
859 fprintf(fo, "%s TRY {\n", prefix);
860 if(c==e->abc_exception->target) {
861 char*s1 = multiname_tostring(e->abc_exception->exc_type);
862 char*s2 = multiname_tostring(e->abc_exception->var_name);
863 fprintf(fo, "%s CATCH(%s %s)\n", prefix, s1, s2);
871 fprintf(stderr, "Can't parse opcode %02x.\n", opcode);
879 int f = stats->stack[c->pos].flags;
880 fprintf(fo, "%s%5d) %c %d:%d %s ", prefix, c->pos,
881 (f&FLAG_ERROR)?'E':((f&FLAG_SEEN)?'+':'|'),
882 stats->stack[c->pos].stackpos,
883 stats->stack[c->pos].scopepos,
886 fprintf(fo, "%s%5d) ? ?:? %s ", prefix, c->pos, op->name);
890 void*data = c->data[i];
895 int n = (ptroff_t)data;
896 fprintf(fo, "%d params", n);
897 } else if(*p == '2') {
898 multiname_t*n = (multiname_t*)data;
899 char* m = multiname_tostring(n);
900 fprintf(fo, "%s", m);
902 } else if(*p == 'm') {
903 abc_method_t*m = (abc_method_t*)data;
904 fprintf(fo, "[method %s]", m->name);
905 } else if(*p == 'c') {
906 abc_class_t*cls = (abc_class_t*)data;
907 char*classname = multiname_tostring(cls->classname);
908 fprintf(fo, "[classinfo %s]", classname);
910 } else if(*p == 'i') {
911 abc_method_body_t*b = (abc_method_body_t*)data;
912 fprintf(fo, "[methodbody]");
913 } else if(*p == 'u' || *p == 'I' || *p == 'U') {
914 int n = (ptroff_t)data;
915 fprintf(fo, "%d", n);
916 } else if(*p == 'f') {
917 double f = *(double*)data;
918 fprintf(fo, "%f", f);
919 } else if(*p == 'r') {
920 int n = (ptroff_t)data;
921 fprintf(fo, "r%d", n);
922 } else if(*p == 'b') {
923 int b = (ptroff_t)data;
924 fprintf(fo, "%02x", b);
925 } else if(*p == 'j') {
927 fprintf(fo, "->%d", c->branch->pos);
929 fprintf(fo, "%08x", c->branch);
930 } else if(*p == 's') {
931 char*s = string_escape((string_t*)data);
932 fprintf(fo, "\"%s\"", s);
934 } else if(*p == 'D') {
935 fprintf(fo, "[register %02x=%s]", (ptroff_t)c->data[1], (char*)c->data[0]);
936 } else if(*p == 'S') {
937 lookupswitch_t*l = c->data[0];
940 fprintf(fo, "default->%d", l->def->pos);
942 fprintf(fo, "default->00000000", l->def->pos);
943 code_list_t*t = l->targets;
946 fprintf(fo, ",->%d", t->code->pos);
948 fprintf(fo, ",->00000000");
953 fprintf(stderr, "Can't parse opcode param type \"%c\"\n", *p);
965 if(c==e->abc_exception->to) {
966 if(e->abc_exception->target)
967 fprintf(fo, "%s } // END TRY (HANDLER: %d)\n", prefix, e->abc_exception->target->pos);
969 fprintf(fo, "%s } // END TRY (HANDLER: 00000000)\n", prefix);
981 codestats_t* code_get_statistics(code_t*code, abc_exception_list_t*exceptions)
983 currentstats_t*current = code_get_stats(code, exceptions);
986 codestats_t*stats = rfx_calloc(sizeof(codestats_t));
987 stats->local_count = current->maxlocal;
988 stats->max_stack = current->maxstack;
989 stats->max_scope_depth = current->maxscope;
990 stats->flags = current->flags;
992 stats_free(current);current=0;
996 void codestats_free(codestats_t*s)
1001 code_t* add_opcode(code_t*atag, U8 op)
1003 code_t*tmp = (code_t*)rfx_calloc(sizeof(code_t));
1008 tmp->next = atag->next;
1016 void codestats_print(codestats_t*stats)
1018 printf("max_stack: %d\n", stats->max_stack);
1019 printf("local_count: %d\n", stats->local_count);
1020 printf("scope_depth: %d\n", stats->max_scope_depth);
1023 code_t* code_end(code_t*code)
1032 code_t* code_append(code_t*code, code_t*toappend)
1035 return code_end(toappend);
1037 return code_end(code);
1038 //find end of first list
1042 code_t*start=toappend;
1043 //and start of second list
1044 while(start->prev) {
1045 start = start->prev;
1049 return code_end(toappend);
1052 lookupswitch_t*lookupswitch_dup(lookupswitch_t*l)
1054 lookupswitch_t*n = malloc(sizeof(lookupswitch_t));
1055 fprintf(stderr, "Error: lookupswitch dupping not supported yet\n");
1056 n->targets = list_clone(l->targets);
1060 code_t*code_dup(code_t*c)
1064 while(c->prev) c = c->prev;
1069 memcpy(n, c, sizeof(code_t));
1071 opcode_t*op = opcode_get(c->opcode);
1073 fprintf(stderr, "Error: Can't duplicate branching code\n");
1076 char*p = op?op->params:"";
1079 if(*p == '2') { //multiname
1080 c->data[pos] = multiname_clone(c->data[pos]);
1081 } else if(*p == 's') {
1082 c->data[pos] = string_dup3(c->data[pos]);
1083 } else if(*p == 'D') {
1084 c->data[pos] = strdup(c->data[pos]);
1085 } else if(*p == 'f') {
1086 double old = *(double*)c->data[pos];
1087 c->data[pos] = malloc(sizeof(double));
1088 *(double*)c->data[pos] = old;
1089 } else if(strchr("S", *p)) {
1090 c->data[pos] = lookupswitch_dup(c->data[pos]);
1105 code_t*code_cutlast(code_t*c)
1109 code_t*prev = c->prev;
1117 code_t* cut_last_push(code_t*c)
1121 opcode_t*op = opcode_get(c->opcode);
1122 /* cut conversion type operations */
1123 if(op->stack_minus == -1 && op->stack_plus == 1 && !(op->flags)) {
1124 c = code_cutlast(c);
1127 /* cut any type of push */
1128 else if(op->stack_minus == 0 && op->stack_plus == 1 && !(op->flags)) {
1129 return code_cutlast(c);
1131 /* cut register lookups */
1132 else if(c->opcode == OPCODE_GETLOCAL ||
1133 c->opcode == OPCODE_GETLOCAL_0 ||
1134 c->opcode == OPCODE_GETLOCAL_1 ||
1135 c->opcode == OPCODE_GETLOCAL_2 ||
1136 c->opcode == OPCODE_GETLOCAL_3) {
1137 return code_cutlast(c);
1139 /* discard function call values */
1140 else if(c->opcode == OPCODE_CALLPROPERTY) {
1141 c->opcode = OPCODE_CALLPROPVOID;
1143 } else if(c->opcode == OPCODE_CALLSUPER) {
1144 c->opcode = OPCODE_CALLSUPERVOID;