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 {0xff, "__break__", "", 0, 0, 0, OP_RETURN},
206 static U8 op2index[256] = {254};
208 opcode_t* opcode_get(U8 op)
211 if(op2index[0]==254) {
212 memset(op2index, 255, sizeof(op2index));
213 for(t=0;t<sizeof(opcodes)/sizeof(opcodes[0]);t++) {
214 op2index[opcodes[t].opcode] = t;
217 if(op2index[op]!=255)
218 return &opcodes[op2index[op]];
222 static code_t*pos2code(code_t**bytepos, code_t*c, int pos, int len)
229 (pos!=len && !bytepos[pos])) {
230 /* flex likes to generate these. yuck. */
232 opcode_t*op = opcode_get(c->opcode);
233 fprintf(stderr, "Warning: Invalid jump instruction \"%s\" from %d to %d (%d)\n", op->name, c->pos, pos, len);
235 fprintf(stderr, "Warning: Invalid jump to %d (%d)\n", pos, len);
240 //opcode_t*op = opcode_get(c->opcode);
241 //fprintf(stderr, "Warning: jump beyond end of code in instruction %s at position %d\n", op->name, c->pos);
248 code_t* code_atposition(codelookup_t*l, int pos)
250 return pos2code(l->bytepos, 0, pos, l->len);
253 void lookupswitch_print(lookupswitch_t*l)
255 printf("default: %08x\n", l->def);
256 code_list_t*t = l->targets;
258 printf("target: %08x\n", t->code);
263 code_t*code_parse(TAG*tag, int len, abc_file_t*file, pool_t*pool, codelookup_t**codelookup)
268 int end=tag->pos+len;
269 //printf("-->\n");fflush(stdout);
271 code_t**bytepos = rfx_calloc(sizeof(code_t*)*len);
273 while(tag->pos<end) {
274 int codepos = tag->pos-start;
275 U8 opcode = swf_GetU8(tag);
276 opcode_t*op = opcode_get(opcode);
278 fprintf(stderr, "Can't parse opcode %02x\n", opcode);
281 //printf("%s\n", op->name);fflush(stdout);
285 bytepos[codepos] = c;
300 if(*p == 'n') { // number
301 data = (void*)(ptroff_t)swf_GetU30(tag);
302 } else if(*p == '2') { //multiname
303 data = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
304 } else if(*p == 'U') { //uint
305 data = (void*)(ptroff_t)pool_lookup_uint(pool, swf_GetU30(tag));
306 } else if(*p == 'I') { //int
307 data = (void*)(ptroff_t)pool_lookup_int(pool, swf_GetU30(tag));
308 } else if(*p == 'f') { //int
309 double*fp = malloc(sizeof(double));
310 *fp = pool_lookup_float(pool, swf_GetU30(tag));
312 } else if(*p == 'm') { //method
313 data = array_getvalue(file->methods, swf_GetU30(tag));
314 } else if(*p == 'c') { //classinfo
315 data = array_getvalue(file->classes, swf_GetU30(tag));
316 } else if(*p == 'i') {
317 data = array_getvalue(file->method_bodies, swf_GetU30(tag));
318 } else if(*p == 'u') { // generic integer
319 data = (void*)(ptroff_t)swf_GetU30(tag);
320 } else if(*p == 'r') { // local register
321 data = (void*)(ptroff_t)swf_GetU30(tag);
322 } else if(*p == 'b') { // byte
323 data = (void*)(ptroff_t)swf_GetU8(tag);
324 } else if(*p == 'j') { // jump
325 int j = swf_GetS24(tag);
326 data = (void*)(ptroff_t)j;
327 } else if(*p == 's') { // string
328 data = strdup((char*)pool_lookup_string(pool, swf_GetU30(tag)));
329 } else if(*p == 'D') { // debug
331 U8 type = swf_GetU8(tag);
333 fprintf(stderr, "Unknown debug type: %02x\n", type);
335 code->data[0] = strdup((char*)pool_lookup_string(pool, swf_GetU30(tag)));
337 code->data[1] = (void*)(ptroff_t)swf_GetU8(tag);
340 } else if(*p == 'S') { // switch statement
341 lookupswitch_t*l = malloc(sizeof(lookupswitch_t));
342 l->def = (code_t*)(ptroff_t)swf_GetS24(tag);
343 l->targets = list_new();
344 int num = swf_GetU30(tag)+1;
347 list_append(l->targets, (code_t*)(ptroff_t)swf_GetS24(tag));
350 printf("Can't parse opcode param type \"%c\" (for op %02x %s).\n", *p, code->opcode, op->name);
354 code->data[pos++] = data;
359 //#define DEBUG_BYTES
363 code_t*c = bytepos[t];
365 opcode_t*op = opcode_get(c->opcode);
366 if(op->flags & (OP_JUMP|OP_BRANCH)) {
367 printf("%5d) %02x %s %d\n", t, tag->data[start+t], op->name, c->data[0]);
369 printf("%5d) %02x %s\n", t, tag->data[start+t], op->name);
372 printf("%5d) %02x\n", t, tag->data[start+t]);
375 //printf("%5d) %02x\n", t, tag->data[start+t]);
380 opcode_t*op = opcode_get(c->opcode);
381 if(op->flags & (OP_JUMP|OP_BRANCH)) {
382 int j = ((int)(ptroff_t)c->data[0]);
383 c->branch = pos2code(bytepos,c,j+4,len);
384 } else if(op->flags & (OP_LOOKUPSWITCH)) {
385 lookupswitch_t*l = (lookupswitch_t*)c->data[0];
387 l->def = pos2code(bytepos,c,(ptroff_t)l->def+offset,len);
388 code_list_t*t=l->targets;
390 t->code = pos2code(bytepos,c,(ptroff_t)t->code+offset,len);
398 (*codelookup) = malloc(sizeof(codelookup_t));
399 (*codelookup)->bytepos = bytepos;
400 (*codelookup)->len = len;
408 void codelookup_free(codelookup_t*codelookup)
410 free(codelookup->bytepos);codelookup->bytepos=0;
414 code_t*code_find_start(code_t*c)
421 void code_free(code_t*c)
423 c = code_find_start(c);
425 code_t*next = c->next;
426 opcode_t*op = opcode_get(c->opcode);
427 char*p = op?op->params:"";
430 void*data = c->data[pos];
431 if(*p == '2') { //multiname
432 multiname_destroy(data);
433 } else if(strchr("sDf", *p)) {
435 } else if(strchr("S", *p)) {
436 lookupswitch_t*l = (lookupswitch_t*)data;
437 list_free(l->targets);l->targets=0;
443 memset(c, 0, sizeof(c));
449 static int opcode_write(TAG*tag, code_t*c, pool_t*pool, abc_file_t*file, int length)
451 opcode_t*op = opcode_get(c->opcode);
457 swf_SetU8(tag, c->opcode);
461 void*data = c->data[pos++];
463 if(*p == 'n') { // number
464 len += swf_SetU30(tag, (ptroff_t)data);
465 } else if(*p == '2') { //multiname
466 multiname_t*m = (multiname_t*)data;
467 len += swf_SetU30(tag, pool_register_multiname(pool, m));
468 } else if(*p == 'm') { //method
469 abc_method_t*m = (abc_method_t*)data;
470 len += swf_SetU30(tag, m->index);
471 } else if(*p == 'c') { //classinfo
472 abc_class_t*cls = (abc_class_t*)data;
473 len += swf_SetU30(tag, cls->index);
474 } else if(*p == 'i') { //methodbody
475 abc_method_body_t*m = (abc_method_body_t*)data;
476 len += swf_SetU30(tag, m->index);
477 } else if(*p == 'I') { // int
478 len += swf_SetU30(tag, pool_register_int(pool, (ptroff_t)data));
479 } else if(*p == 'U') { // uint
480 len += swf_SetU30(tag, pool_register_uint(pool, (ptroff_t)data));
481 } else if(*p == 'f') { // float
482 len += swf_SetU30(tag, pool_register_float(pool, *(double*)data));
483 } else if(*p == 'u') { // integer
484 len += swf_SetU30(tag, (ptroff_t)data);
485 } else if(*p == 'r') { // integer
486 len += swf_SetU30(tag, (ptroff_t)data);
487 } else if(*p == 'b') { // byte
489 swf_SetU8(tag, (ptroff_t)data);
491 } else if(*p == 'j') { // jump
492 int skip = length-c->pos-4;
494 skip = (c->branch->pos) - c->pos - 4;
495 len += swf_SetS24(tag, skip);
496 } else if(*p == 's') { // string
497 int index = pool_register_string(pool, data);
498 len += swf_SetU30(tag, index);
499 } else if(*p == 'D') { // debug statement
503 len+=swf_SetU30(tag, pool_register_string(pool,c->data[0]));
505 swf_SetU8(tag, (ptroff_t)c->data[1]);
507 len+=swf_SetU30(tag, 0);
508 } else if(*p == 'S') { // switch statement
509 lookupswitch_t*l = (lookupswitch_t*)data;
511 len+=swf_SetS24(tag, l->def->pos-c->pos+offset); //default
512 code_list_t*t = l->targets;
514 len+=swf_SetU30(tag, list_length(t)-1); //nr-1
515 code_list_t*t = l->targets;
517 len+=swf_SetS24(tag, t->code->pos - c->pos+offset);
521 len+=swf_SetU30(tag, 0); //nr-1
522 len+=swf_SetS24(tag, l->def->pos-c->pos+offset);
525 printf("Can't parse opcode param type \"%c\"\n", *p);
532 void code_write(TAG*tag, code_t*code, pool_t*pool, abc_file_t*file)
534 code = code_find_start(code);
540 pos += opcode_write(0, c, pool, file, 0);
544 swf_SetU30(tag, pos);
545 int start = tag->len;
549 opcode_t*op = opcode_get(code->opcode);
550 if(op->flags&(OP_BRANCH|OP_JUMP)) {
553 pos += opcode_write(tag, c, pool, file, length);
556 assert(tag->len - start == pos);
576 static int stack_minus(code_t*c)
578 opcode_t*op = opcode_get(c->opcode);
579 if(op->stack_minus>0) {
580 fprintf(stderr, "Invalid opcode entry %02x %s\n", c->opcode, op->name);
582 int stack = op->stack_minus;
583 if(op->flags&OP_STACK_NS) {
584 multiname_t*m = (multiname_t*)c->data[0];
585 if(multiname_late_namespace(m))
587 if(multiname_late_name(m))
590 if(op->flags&OP_STACK_ARGS || op->flags&OP_STACK_ARGS2) {
591 assert(strchr(op->params, 'n'));
592 int nr = (ptroff_t)(op->params[0]=='n'?c->data[0]:c->data[1]);
594 if(op->flags&OP_STACK_ARGS2)
599 static void handleregister(currentstats_t*stats, int reg)
601 if(reg+1 > stats->maxlocal)
602 stats->maxlocal = reg+1;
608 static void dumpstack(currentstats_t*stats)
611 for(t=0;t<stats->num;t++) {
612 code_t*c = stats->stack[t].code;
613 opcode_t*op = opcode_get(c->opcode);
614 printf("%5d) %c %d:%d %s", t, (stats->stack[t].flags&FLAG_SEEN)?'x':'|',
615 stats->stack[t].stackpos,
616 stats->stack[t].scopepos,
619 if(op->flags&(OP_BRANCH|OP_JUMP)) {
621 printf(" ->%d\n", c->branch->pos);
623 printf(" 00000000\n");
625 if(op->params[0]=='2') {
626 printf(" %s", multiname_tostring(c->data[0]));
632 static char callcode(currentstats_t*stats, int pos, int stack, int scope)
634 while(pos<stats->num) {
635 if(stats->stack[pos].flags&FLAG_SEEN) {
636 if(stats->stack[pos].stackpos != stack ||
637 stats->stack[pos].scopepos != scope) {
639 stats->stack[pos].flags |= FLAG_ERROR;
640 fprintf(stderr, "Stack mismatch at pos %d\n", pos);
641 fprintf(stderr, "Should be: %d:%d, is: %d:%d\n", stack, scope,
642 stats->stack[pos].stackpos, stats->stack[pos].scopepos);
644 /* return error here if we do verification */
650 stats->stack[pos].flags |= FLAG_SEEN;
651 stats->stack[pos].stackpos = stack;
652 stats->stack[pos].scopepos = scope;
654 code_t*c = stats->stack[pos].code;
655 opcode_t*op = opcode_get(c->opcode);
657 //printf("Walking %s at position %d, stack=%d, scope=%d\n", op->name, pos, stack, scope);
659 stack += stack_minus(c);
662 stats->stack[pos].flags |= FLAG_ERROR;
663 fprintf(stderr, "error: stack underflow at %d (%s)\n", pos, op->name);
665 /* if we would do true verification (if we would be a vm), this is
666 where we would return the error
671 stack += op->stack_plus;
672 scope += op->scope_stack_plus;
674 if(stack > stats->maxstack)
675 stats->maxstack = stack;
676 if(scope > stats->maxscope)
677 stats->maxscope = scope;
679 if(op->flags & OP_SET_DXNS)
680 stats->flags |= FLAGS_SET_DXNS;
681 if(op->flags & OP_NEED_ACTIVATION)
682 stats->flags |= FLAGS_ACTIVATION;
684 if(c->opcode == OPCODE_NEWCLASS) {
685 abc_class_t*cls = (abc_class_t*)(c->data[0]);
686 if(scope > cls->init_scope_depth)
687 cls->init_scope_depth = scope;
689 if(c->opcode == OPCODE_NEWFUNCTION) {
690 abc_method_t*m = (abc_method_t*)(c->data[0]);
691 if(m->body && scope > m->body->init_scope_depth)
692 m->body->init_scope_depth = scope;
695 if(op->flags & OP_REGISTER) {
701 handleregister(stats, (ptroff_t)c->data[pos]);
707 handleregister(stats, c->opcode&3);
710 if(op->flags&OP_RETURN) {
711 if(OP_RETURN==0x48/*returnvalue*/) {
713 stats->stack[pos].flags |= FLAG_ERROR;
714 fprintf(stderr, "return(value) with stackposition %d\n", stack);
716 } else if(OP_RETURN==0x47) {
718 stats->stack[pos].flags |= FLAG_ERROR;
719 fprintf(stderr, "return(void) with stackposition %d\n", stack);
723 if(op->flags & (OP_THROW|OP_RETURN))
725 if(op->flags & OP_JUMP) {
727 stats->stack[pos].flags |= FLAG_ERROR;
728 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d.\n", op->name, pos);
735 if(op->flags & OP_BRANCH) {
737 stats->stack[pos].flags |= FLAG_ERROR;
738 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
741 int newpos = c->branch->pos;
742 if(!callcode(stats, newpos, stack, scope))
745 if(op->flags & OP_LOOKUPSWITCH) {
746 lookupswitch_t*l = c->data[0];
748 stats->stack[pos].flags |= FLAG_ERROR;
749 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
752 if(!callcode(stats, l->def->pos, stack, scope))
754 code_list_t*t = l->targets;
757 stats->stack[pos].flags |= FLAG_ERROR;
758 fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
761 if(!callcode(stats, t->code->pos, stack, scope))
769 assert(c->next == stats->stack[pos].code);
775 static currentstats_t* code_get_stats(code_t*code, abc_exception_list_t*exceptions)
777 code = code_find_start(code);
784 currentstats_t* current = malloc(sizeof(currentstats_t));
785 current->stack = rfx_calloc(sizeof(stackpos_t)*num);
786 current->maxlocal = 0;
787 current->maxstack = 0;
788 current->maxscope = 0;
792 //#define DEBUG_BYTES
797 opcode_t*op = opcode_get(c->opcode);
798 if(op->flags & (OP_JUMP|OP_BRANCH)) {
799 printf("%5d) %s %08x\n", t, op->name, c->branch);
800 } else if(op->params[0]=='2') {
801 printf("%5d) %s %s\n", t, op->name, multiname_tostring(c->data[0]));
803 printf("%5d) %s\n", t, op->name);
807 //printf("%5d) %02x\n", t, tag->data[start+t]);
814 current->stack[num].code = c;
820 if(!callcode(current, 0, 0, 0)) {
824 abc_exception_list_t*e = exceptions;
826 if(e->abc_exception->target)
827 callcode(current, e->abc_exception->target->pos, 1, 0);
834 void stats_free(currentstats_t*stats)
837 free(stats->stack);stats->stack=0;
842 int code_dump(code_t*c, abc_exception_list_t*exceptions, abc_file_t*file, char*prefix, FILE*fo)
844 abc_exception_list_t*e = exceptions;
845 c = code_find_start(c);
846 currentstats_t*stats = code_get_stats(c, exceptions);
850 U8 opcode = c->opcode;
852 opcode_t*op = opcode_get(opcode);
856 if(c==e->abc_exception->from)
857 fprintf(fo, "%s TRY {\n", prefix);
858 if(c==e->abc_exception->target) {
859 char*s1 = multiname_tostring(e->abc_exception->exc_type);
860 char*s2 = multiname_tostring(e->abc_exception->var_name);
861 fprintf(fo, "%s CATCH(%s %s)\n", prefix, s1, s2);
869 fprintf(stderr, "Can't parse opcode %02x.\n", opcode);
877 int f = stats->stack[c->pos].flags;
878 fprintf(fo, "%s%5d) %c %d:%d %s ", prefix, c->pos,
879 (f&FLAG_ERROR)?'E':((f&FLAG_SEEN)?'+':'|'),
880 stats->stack[c->pos].stackpos,
881 stats->stack[c->pos].scopepos,
884 fprintf(fo, "%s%5d) ? ?:? %s ", prefix, c->pos, op->name);
888 void*data = c->data[i];
893 int n = (ptroff_t)data;
894 fprintf(fo, "%d params", n);
895 } else if(*p == '2') {
896 multiname_t*n = (multiname_t*)data;
897 char* m = multiname_tostring(n);
898 fprintf(fo, "%s", m);
900 } else if(*p == 'm') {
901 abc_method_t*m = (abc_method_t*)data;
902 fprintf(fo, "[method %s]", m->name);
903 } else if(*p == 'c') {
904 abc_class_t*cls = (abc_class_t*)data;
905 char*classname = multiname_tostring(cls->classname);
906 fprintf(fo, "[classinfo %s]", classname);
908 } else if(*p == 'i') {
909 abc_method_body_t*b = (abc_method_body_t*)data;
910 fprintf(fo, "[methodbody]");
911 } else if(*p == 'u' || *p == 'I' || *p == 'U') {
912 int n = (ptroff_t)data;
913 fprintf(fo, "%d", n);
914 } else if(*p == 'f') {
915 double f = *(double*)data;
916 fprintf(fo, "%f", f);
917 } else if(*p == 'r') {
918 int n = (ptroff_t)data;
919 fprintf(fo, "r%d", n);
920 } else if(*p == 'b') {
921 int b = (ptroff_t)data;
922 fprintf(fo, "%02x", b);
923 } else if(*p == 'j') {
925 fprintf(fo, "->%d", c->branch->pos);
927 fprintf(fo, "%08x", c->branch);
928 } else if(*p == 's') {
929 fprintf(fo, "\"%s\"", data);
930 } else if(*p == 'D') {
931 fprintf(fo, "[register %02x=%s]", (ptroff_t)c->data[1], (char*)c->data[0]);
932 } else if(*p == 'S') {
933 lookupswitch_t*l = c->data[0];
936 fprintf(fo, "default->%d", l->def->pos);
938 fprintf(fo, "default->00000000", l->def->pos);
939 code_list_t*t = l->targets;
942 fprintf(fo, ",->%d", t->code->pos);
944 fprintf(fo, ",->00000000");
949 fprintf(stderr, "Can't parse opcode param type \"%c\"\n", *p);
961 if(c==e->abc_exception->to) {
962 if(e->abc_exception->target)
963 fprintf(fo, "%s } // END TRY (HANDLER: %d)\n", prefix, e->abc_exception->target->pos);
965 fprintf(fo, "%s } // END TRY (HANDLER: 00000000)\n", prefix);
977 codestats_t* code_get_statistics(code_t*code, abc_exception_list_t*exceptions)
979 currentstats_t*current = code_get_stats(code, exceptions);
982 codestats_t*stats = rfx_calloc(sizeof(codestats_t));
983 stats->local_count = current->maxlocal;
984 stats->max_stack = current->maxstack;
985 stats->max_scope_depth = current->maxscope;
986 stats->flags = current->flags;
988 stats_free(current);current=0;
992 void codestats_free(codestats_t*s)
997 code_t* add_opcode(code_t*atag, U8 op)
999 code_t*tmp = (code_t*)rfx_calloc(sizeof(code_t));
1004 tmp->next = atag->next;
1012 void codestats_print(codestats_t*stats)
1014 printf("max_stack: %d\n", stats->max_stack);
1015 printf("local_count: %d\n", stats->local_count);
1016 printf("scope_depth: %d\n", stats->max_scope_depth);
1019 code_t* code_end(code_t*code)
1028 code_t* code_append(code_t*code, code_t*toappend)
1031 return code_end(toappend);
1033 return code_end(code);
1034 //find end of first list
1038 code_t*start=toappend;
1039 //and start of second list
1040 while(start->prev) {
1041 start = start->prev;
1045 return code_end(toappend);
1048 lookupswitch_t*lookupswitch_dup(lookupswitch_t*l)
1050 lookupswitch_t*n = malloc(sizeof(lookupswitch_t));
1051 fprintf(stderr, "lookupswitch dupping not supported yet\n");
1052 n->targets = list_clone(l->targets);
1056 code_t*code_dup(code_t*c)
1058 /* misses branch relocation */
1059 fprintf(stderr, "dupping not supported yet\n");
1063 while(c->prev) c = c->prev;
1068 memcpy(n, c, sizeof(code_t));
1070 opcode_t*op = opcode_get(c->opcode);
1071 char*p = op?op->params:"";
1074 if(*p == '2') { //multiname
1075 c->data[pos] = multiname_clone(c->data[pos]);
1076 } else if(*p == 's' || *p == 'D') {
1077 c->data[pos] = strdup(c->data[pos]);
1078 } else if(*p == 'f') {
1079 double old = *(double*)c->data[pos];
1080 c->data[pos] = malloc(sizeof(double));
1081 *(double*)c->data[pos] = old;
1082 } else if(strchr("S", *p)) {
1083 c->data[pos] = lookupswitch_dup(c->data[pos]);
1098 code_t*code_cutlast(code_t*c)
1101 code_t*prev = c->prev;