+/* code.c
+
+ Routines for handling Flash2 AVM2 ABC Actionscript
+
+ Extension module for the rfxswf library.
+ Part of the swftools package.
+
+ Copyright (c) 2008 Matthias Kramm <kramm@quiss.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+
#include <assert.h>
#include "code.h"
#include "pool.h"
{0x03, "throw", "", -1, 0, 0, OP_THROW},
{0x95, "typeof", "", -1, 1, 0, 0},
{0xa7, "urshift", "", -2, 1, 0, 0},
+
+/* opcodes not documented, but seen in the wild */
+//0x53: seen in builtin.abc- followed by 0x01 (might be the number of stack params)
+{0x53, "xxx1", "", -1, 0, 0, 0},
+{0x01, "xxx2", "", 0, 0, 0, 0},
+
+/* dummy instruction. Warning: this one is not actually supported by flash */
+{0xff, "__break__", "", 0, 0, 0, OP_RETURN},
};
static U8 op2index[256] = {254};
opcode_t*op = opcode_get(opcode);
if(!op) {
fprintf(stderr, "Can't parse opcode %02x\n", opcode);
- return head;
+ continue;
}
//printf("%s\n", op->name);fflush(stdout);
NEW(code_t,c);
int stackpos;
int scopepos;
code_t*code;
- char seen;
+ char flags;
+ char error;
} stackpos_t;
typedef struct {
stats->maxlocal = reg+1;
}
+#define FLAG_SEEN 1
+#define FLAG_ERROR 2
+
static void dumpstack(currentstats_t*stats)
{
int t;
for(t=0;t<stats->num;t++) {
code_t*c = stats->stack[t].code;
opcode_t*op = opcode_get(c->opcode);
- printf("%5d) %c %d:%d %s", t, stats->stack[t].seen?'x':'|',
+ printf("%5d) %c %d:%d %s", t, (stats->stack[t].flags&FLAG_SEEN)?'x':'|',
stats->stack[t].stackpos,
stats->stack[t].scopepos,
op->name);
static char callcode(currentstats_t*stats, int pos, int stack, int scope)
{
while(pos<stats->num) {
- if(stats->stack[pos].seen) {
+ if(stats->stack[pos].flags&FLAG_SEEN) {
if(stats->stack[pos].stackpos != stack ||
stats->stack[pos].scopepos != scope) {
//dumpstack(stats);
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "Stack mismatch at pos %d\n", pos);
fprintf(stderr, "Should be: %d:%d, is: %d:%d\n", stack, scope,
stats->stack[pos].stackpos, stats->stack[pos].scopepos);
return 1;
}
- stats->stack[pos].seen = 1;
+ stats->stack[pos].flags |= FLAG_SEEN;
stats->stack[pos].stackpos = stack;
stats->stack[pos].scopepos = scope;
stack += stack_minus(c);
if(stack<0) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "error: stack underflow at %d (%s)\n", pos, op->name);
/* if we would do true verification (if we would be a vm), this is
}
if(op->flags&OP_RETURN) {
if(OP_RETURN==0x48/*returnvalue*/) {
- if(stack!=1)
+ if(stack!=1) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "return(value) with stackposition %d\n", stack);
+ }
} else if(OP_RETURN==0x47) {
- if(stack!=0)
+ if(stack!=0) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "return(void) with stackposition %d\n", stack);
+ }
}
}
if(op->flags & (OP_THROW|OP_RETURN))
return 1;
if(op->flags & OP_JUMP) {
if(!c->branch) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d.\n", op->name, pos);
return 0;
}
}
if(op->flags & OP_BRANCH) {
if(!c->branch) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
return 0;
}
if(op->flags & OP_LOOKUPSWITCH) {
lookupswitch_t*l = c->data[0];
if(!l->def) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
return 0;
}
code_list_t*t = l->targets;
while(t) {
if(!t->code) {
+ stats->stack[pos].flags |= FLAG_ERROR;
fprintf(stderr, "Error: Invalid jump target in instruction %s at position %d\n", op->name, pos);
return 0;
}
return 1;
}
-static currentstats_t* code_get_stats(code_t*code, exception_list_t*exceptions)
+static currentstats_t* code_get_stats(code_t*code, abc_exception_list_t*exceptions)
{
code = code_find_start(code);
int num = 0;
free(current);
return 0;
}
- exception_list_t*e = exceptions;
+ abc_exception_list_t*e = exceptions;
while(e) {
- if(e->exception->target)
- callcode(current, e->exception->target->pos, 1, 0);
+ if(e->abc_exception->target)
+ callcode(current, e->abc_exception->target->pos, 1, 0);
e = e->next;
}
}
}
-int code_dump(code_t*c, exception_list_t*exceptions, abc_file_t*file, char*prefix, FILE*fo)
+int code_dump(code_t*c, abc_exception_list_t*exceptions, abc_file_t*file, char*prefix, FILE*fo)
{
- exception_list_t*e = exceptions;
+ abc_exception_list_t*e = exceptions;
c = code_find_start(c);
currentstats_t*stats = code_get_stats(c, exceptions);
e = exceptions;
while(e) {
- if(c==e->exception->from)
+ if(c==e->abc_exception->from)
fprintf(fo, "%s TRY {\n", prefix);
- if(c==e->exception->target) {
- char*s1 = multiname_tostring(e->exception->exc_type);
- char*s2 = multiname_tostring(e->exception->var_name);
+ if(c==e->abc_exception->target) {
+ char*s1 = multiname_tostring(e->abc_exception->exc_type);
+ char*s2 = multiname_tostring(e->abc_exception->var_name);
fprintf(fo, "%s CATCH(%s %s)\n", prefix, s1, s2);
free(s1);
free(s2);
int i=0;
if(stats) {
- fprintf(fo, "%s%5d) %c %d:%d %s ", prefix, c->pos, stats->stack[c->pos].seen?'x':'|',
+ int f = stats->stack[c->pos].flags;
+ fprintf(fo, "%s%5d) %c %d:%d %s ", prefix, c->pos,
+ (f&FLAG_ERROR)?'E':((f&FLAG_SEEN)?'+':'|'),
stats->stack[c->pos].stackpos,
stats->stack[c->pos].scopepos,
op->name);
e = exceptions;
while(e) {
- if(c==e->exception->to) {
- if(e->exception->target)
- fprintf(fo, "%s } // END TRY (HANDLER: %d)\n", prefix, e->exception->target->pos);
+ if(c==e->abc_exception->to) {
+ if(e->abc_exception->target)
+ fprintf(fo, "%s } // END TRY (HANDLER: %d)\n", prefix, e->abc_exception->target->pos);
else
fprintf(fo, "%s } // END TRY (HANDLER: 00000000)\n", prefix);
}
return 1;
}
-codestats_t* code_get_statistics(code_t*code, exception_list_t*exceptions)
+codestats_t* code_get_statistics(code_t*code, abc_exception_list_t*exceptions)
{
currentstats_t*current = code_get_stats(code, exceptions);
if(!current)
printf("scope_depth: %d\n", stats->max_scope_depth);
}
+code_t* code_end(code_t*code)
+{
+ if(!code)
+ return 0;
+ while(code->next)
+ code = code->next;
+ return code;
+}
+
code_t* code_append(code_t*code, code_t*toappend)
{
if(!code)
- return toappend;
+ return code_end(toappend);
if(!toappend)
- return code;
+ return code_end(code);
//find end of first list
while(code->next) {
code = code->next;
}
code->next = start;
start->prev = code;
- return toappend;
+ return code_end(toappend);
}
git.asbjorn.biz / swftools.git / blobdiff