radare2/libr/anal/var.c
2015-12-31 17:10:02 +01:00

509 lines
14 KiB
C

/* radare - LGPL - Copyright 2010-2015 - pancake */
#include <r_anal.h>
#include <r_util.h>
#include <r_cons.h>
#include <r_list.h>
#define DB a->sdb_fcns
struct VarType {
char kind;
char *type;
int size;
char *name;
};
#define SDB_VARTYPE_FMT "czdz"
// WHAT ABOUT REGISTER VARIABLES?
#define EXISTS(x,y...) snprintf (key, sizeof (key)-1, x, ##y), sdb_exists(DB,key)
#define SETKEY(x,y...) snprintf (key, sizeof (key)-1, x, ##y);
#define SETKEY2(x,y...) snprintf (key2, sizeof (key)-1, x, ##y);
#define SETVAL(x,y...) snprintf (val, sizeof (val)-1, x, ##y);
#if 0
// DUPPED FUNCTIONALITY
// kind = char? 'a'rg 'v'var (local, in frame), 'A' fast arg, register
#endif
R_API int r_anal_fcn_arg_add (RAnal *a, ut64 fna, int scope, int delta, const char *type, const char *name) {
return r_anal_var_add (a, fna, scope, delta, 'a', type, 4, name);
}
R_API int r_anal_fcn_var_add (RAnal *a, ut64 fna, int scope, int delta, const char *type, const char *name) {
return r_anal_var_add (a, fna, scope, delta, 'v', type, 4, name);
}
R_API int r_anal_var_add (RAnal *a, ut64 addr, int scope, int delta, char kind, const char *type, int size, const char *name) {
char *var_def;
if (!kind) kind ='v';
if (!type) type = "int";
//eprintf ("VAR ADD 0x%llx - %d\n", addr, delta);
switch (kind) {
case 'a':
case 'r':
case 'v':
break;
default:
eprintf ("Invalid var kind '%c'\n", kind);
return false;
}
var_def = sdb_fmt (0,"%c,%s,%d,%s", kind, type, size, name);
if (scope>0) {
/* local variable */
char *fcn_key = sdb_fmt (1, "fcn.0x%"PFMT64x".%c", addr, kind);
char *var_key = sdb_fmt (2, "var.0x%"PFMT64x".%c.%d.%d", addr, kind, scope, delta);
char *name_key = sdb_fmt (3, "var.0x%"PFMT64x".%c.%d.%s", addr, kind, scope, name);
char *shortvar = sdb_fmt (4, "%d.%d", scope, delta);
sdb_array_add (DB, fcn_key, shortvar, 0);
sdb_set (DB, var_key, var_def, 0);
sdb_num_set (DB, name_key, delta, 0);
} else {
/* global variable */
char *var_global = sdb_fmt (1, "var.0x%"PFMT64x, addr);
char *var_def = sdb_fmt (2,"%c.%s,%d,%s", kind, type, size, name);
sdb_array_add (DB, var_global, var_def, 0);
}
// ls_sort (DB->ht->list, mystrcmp);
return true;
}
R_API int r_anal_var_retype (RAnal *a, ut64 addr, int scope, int delta, char kind, const char *type, int size, const char *name) {
char *var_def;
if (!kind) kind ='v';
if (!type) type = "int";
if (size==-1) {
RAnalFunction *fcn = r_anal_get_fcn_in (a, addr, 0);
RList *list = r_anal_var_list (a, fcn, kind);
RListIter *iter;
RAnalVar *var;
r_list_foreach (list, iter, var) {
if (delta == -1) {
if (!strcmp (var->name, name)) {
delta = var->delta;
size = var->size;
break;
}
}
}
r_list_free (list);
}
switch (kind) {
case 'a':
case 'r':
case 'v':
break;
default:
eprintf ("Invalid var kind '%c'\n", kind);
return false;
}
var_def = sdb_fmt (0,"%c,%s,%d,%s", kind, type, size, name);
if (scope>0) {
/* local variable */
char *fcn_key = sdb_fmt (1, "fcn.0x%"PFMT64x".%c", addr, kind);
char *var_key = sdb_fmt (2, "var.0x%"PFMT64x".%c.%d.%d", addr, kind, scope, delta);
char *name_key = sdb_fmt (3, "var.0x%"PFMT64x".%c.%d.%s", addr, kind, scope, name);
char *shortvar = sdb_fmt (4, "%d.%d", scope, delta);
sdb_array_add (DB, fcn_key, shortvar, 0);
sdb_set (DB, var_key, var_def, 0);
sdb_num_set (DB, name_key, delta, 0);
} else {
/* global variable */
char *var_global = sdb_fmt (1, "var.0x%"PFMT64x, addr);
sdb_array_add (DB, var_global, var_def, 0);
}
return true;
}
R_API int r_anal_var_delete_all (RAnal *a, ut64 addr, const char kind) {
RAnalFunction *fcn;
fcn = r_anal_get_fcn_in (a, addr, 0);
if (fcn) {
RAnalVar *v;
RListIter *iter;
RList *list = r_anal_var_list (a, fcn, kind);
r_list_foreach (list, iter, v) {
//r_anal_var_delete (a, addr, kind, v->scope, v->delta);
r_anal_var_delete (a, addr, kind, 1, v->delta);
}
r_list_free (list);
}
return 0;
}
R_API int r_anal_var_delete (RAnal *a, ut64 addr, const char kind, int scope, int delta) {
RAnalVar *av;
if (delta<0) delta = -delta;
av = r_anal_var_get (a, addr, kind, scope, delta);
if (!av) {
return false;
}
if (scope>0) {
char *fcn_key = sdb_fmt (1, "fcn.0x%"PFMT64x".%c", addr, kind);
char *var_key = sdb_fmt (2, "var.0x%"PFMT64x".%c.%d.%d", addr, kind, scope, delta);
char *name_key = sdb_fmt (3, "var.0x%"PFMT64x".%c.%d.%s", addr, kind, scope, av->name);
char *shortvar = sdb_fmt (4, "%d.%d", scope, delta);
sdb_array_remove (DB, fcn_key, shortvar, 0);
sdb_unset (DB, var_key, 0);
sdb_unset (DB, name_key, 0);
} else {
char *var_global = sdb_fmt (1, "var.0x%"PFMT64x, addr);
char *var_def = sdb_fmt (2,"%c.%s,%d,%s", kind, av->type, av->size, av->name);
sdb_array_remove (DB, var_global, var_def, 0);
}
r_anal_var_access_clear (a, addr, scope, delta);
return true;
}
R_API bool r_anal_var_delete_byname (RAnal *a, RAnalFunction *fcn, int kind, const char *name) {
char *varlist;
if (!a || !fcn) {
return false;
}
varlist = sdb_get (DB, sdb_fmt (0, "fcn.0x%"PFMT64x".%c",
fcn->addr, kind), 0);
if (varlist) {
char *next, *ptr = varlist;
if (varlist && *varlist) {
do {
char *word = sdb_anext (ptr, &next);
char *vardef = sdb_get (DB, sdb_fmt (1,
"var.0x%"PFMT64x".%c.%s",
fcn->addr, kind, word), 0);
int delta = strlen(word)<3? -1: atoi (word+2);
if (vardef) {
const char *p = strchr (vardef, ',');
if (p) {
p = strchr (p + 1, ',');
if (p) {
p = strchr (p + 1, ',');
if (p) {
int mykind = vardef[0];
if (!strcmp (p+1, name)) {
return r_anal_var_delete (a, fcn->addr,
mykind, 1, delta);
}
}
}
}
} else {
eprintf ("Inconsistent Sdb storage, Cannot find '%s'\n", word);
}
ptr = next;
} while (next);
}
}
free (varlist);
return false;
}
R_API RAnalVar *r_anal_var_get (RAnal *a, ut64 addr, char kind, int scope, int delta) {
RAnalVar *av;
struct VarType vt;
RAnalFunction *fcn = r_anal_get_fcn_in (a, addr, 0);
if (!fcn)
return NULL;
if (delta<0) {
kind = 'v';
delta = -delta;
}
char *vardef = sdb_get (DB,
sdb_fmt (0, "var.0x%"PFMT64x".%c.%d.%d",
fcn->addr, kind, scope, delta), 0);
if (!vardef)
return NULL;
sdb_fmt_tobin (vardef, SDB_VARTYPE_FMT, &vt);
av = R_NEW0 (RAnalVar);
av->addr = addr;
av->scope = scope;
av->delta = delta;
av->name = strdup (vt.name);
av->size = vt.size;
av->type = strdup (vt.type);
sdb_fmt_free (&vt, SDB_VARTYPE_FMT);
// TODO:
// get name from sdb
// get size from sdb
// get type from sdb
return av;
}
R_API void r_anal_var_free (RAnalVar *av) {
free (av->name);
free (av->type);
free (av);
}
/* (columns) elements in the array value */
#define R_ANAL_VAR_SDB_KIND 0 /* char */
#define R_ANAL_VAR_SDB_TYPE 1 /* string */
#define R_ANAL_VAR_SDB_SIZE 2 /* number */
#define R_ANAL_VAR_SDB_NAME 3 /* string */
R_API int r_anal_var_check_name(const char *name) {
// restrict length
// name is not base64'd . because no specials can be contained
// TODO: check that new_name is valid. this is a hack
if (*name=='0' || atoi (name)>0) return 0;
if (strchr (name, '.')) return 0;
if (strchr (name, ',')) return 0;
if (strchr (name, ' ')) return 0;
if (strchr (name, '=')) return 0;
if (strchr (name, '/')) return 0;
return 1;
}
// afvn local_48 counter
R_API int r_anal_var_rename (RAnal *a, ut64 var_addr, int scope, char kind, const char *old_name, const char *new_name) {
char key[128];
char *stored_name;
int delta;
if (!r_anal_var_check_name (new_name))
return 0;
if (scope>0) { // local
SETKEY ("var.0x%"PFMT64x".%c.%d.%s", var_addr, kind, scope, old_name);
delta = sdb_num_get (DB, key, 0);
sdb_unset (DB, key, 0);
SETKEY ("var.0x%"PFMT64x".%c.%d.%s", var_addr, kind, scope, new_name);
sdb_num_set (DB, key, delta, 0);
SETKEY ("var.0x%"PFMT64x".%c.%d.%d", var_addr, kind, scope, delta);
sdb_array_set (DB, key, R_ANAL_VAR_SDB_NAME, new_name, 0);
} else { // global
SETKEY ("var.0x%"PFMT64x, var_addr);
stored_name = sdb_array_get (DB, key, R_ANAL_VAR_SDB_NAME, 0);
if (!stored_name) return 0;
if (stored_name != old_name) return 0;
sdb_unset (DB, key, 0);
SETKEY ("var.0x%"PFMT64x, var_addr);
sdb_array_set (DB, key, R_ANAL_VAR_SDB_NAME, new_name, 0);
}
// var.sdb_hash(old_name)=var_addr.scope.delta
return 1;
}
// afvt local_48 int
#if 0
R_API int r_anal_var_retype(RAnal *a, ut64 var_addr, int scope, char kind, const char *old_name, const char *new_type) {
char key[128];
char *stored_name;
int delta;
if (!r_anal_var_check_name (old_name))
return 0;
if (scope>0) { // local
SETKEY ("var.0x%"PFMT64x".%c.%d.%s", var_addr, kind, scope, old_name);
delta = sdb_num_get (DB, key, 0);
sdb_unset (DB, key, 0);
SETKEY ("var.0x%"PFMT64x".%c.%d.%s", var_addr, kind, scope, old_name);
sdb_num_set (DB, key, delta, 0);
SETKEY ("var.0x%"PFMT64x".%s.%d.%d", var_addr, new_type, scope, delta);
sdb_array_set (DB, key, R_ANAL_VAR_SDB_NAME, old_name, 0);
} else { // global
SETKEY ("var.0x%"PFMT64x, var_addr);
stored_name = sdb_array_get (DB, key, R_ANAL_VAR_SDB_NAME, 0);
if (!stored_name) return 0;
if (stored_name != old_name) return 0;
sdb_unset (DB, key, 0);
SETKEY ("var.0x%"PFMT64x, var_addr);
//sdb_array_set (DB, key, R_ANAL_VAR_SDB_NAME, new_name, 0);
}
// var.sdb_hash(old_name)=var_addr.scope.delta
return 1;
}
#endif
// avr
R_API int r_anal_var_access (RAnal *a, ut64 var_addr, char kind, int scope, int delta, int xs_type, ut64 xs_addr) {
const char *var_global;
const char *xs_type_str = xs_type? "writes": "reads";
// TODO: kind is not used
if (scope>0) { // local
char *var_local = sdb_fmt (0, "var.0x%"PFMT64x".%d.%d.%s",
var_addr, scope, delta, xs_type_str);
return sdb_array_add_num (DB, var_local, xs_addr, 0);
}
// global
sdb_add (DB, sdb_fmt (0,"var.0x%"PFMT64x, var_addr), "a,", 0);
var_global = sdb_fmt (0, "var.0x%"PFMT64x".%s", var_addr, xs_type_str);
return sdb_array_add_num (DB, var_global, xs_addr, 0);
}
R_API void r_anal_var_access_clear (RAnal *a, ut64 var_addr, int scope, int delta) {
char key[128], key2[128];
if (scope>0) { // local arg or var
SETKEY ("var.0x%"PFMT64x".%d.%d.%s", var_addr, scope, delta, "writes");
SETKEY2 ("var.0x%"PFMT64x".%d.%d.%s", var_addr, scope, delta, "reads");
} else { // global
SETKEY ("var.0x%"PFMT64x".%s", var_addr, "writes");
SETKEY2 ("var.0x%"PFMT64x".%s", var_addr, "reads");
}
sdb_unset (DB, key, 0);
sdb_unset (DB, key2, 0);
}
#if 0
#if FCN_SDB
#if 0
fcn.0x80480.v=8,16,24
fcn.0x80480.v.8=name,type
#endif
char key[1024], val[1024], *e;
if (EXISTS("fcn.0x%08"PFMT64x, fna)) {
SETKEY("fcn.0x%08"PFMT64x".%c", fna, kind);
if (sdb_array_contains_num (DB, key, delta, 0))
return false;
e = sdb_encode (name, -1);
if (e) {
sdb_array_push (DB, key, e, 0);
sdb_array_push_num (DB, key, delta, 0);
free (e);
} else {
eprintf ("Cannot encode string\n");
}
} else {
eprintf ("r_anal_fcn_local_add: cannot find function.\n");
return false;
}
#endif
return true;
}
#endif
R_API int r_anal_fcn_var_del_bydelta (RAnal *a, ut64 fna, const char kind, int scope, ut32 delta) {
int idx;
char key[128], val[128], *v;
SETKEY("fcn.0x%08"PFMT64x".%c", fna, kind);
v = sdb_itoa (delta, val, 10);
idx = sdb_array_indexof (DB, key, v, 0);
if (idx != -1) {
sdb_array_delete (DB, key, idx, 0);
SETKEY ("fcn.0x%08"PFMT64x".%c.%d", fna, kind, delta);
sdb_unset (DB, key, 0);
}
return false;
}
R_API int r_anal_var_count(RAnal *a, RAnalFunction *fcn, int kind) {
char *varlist;
int count = 0;
RList *list = r_list_new ();
if (!a || !fcn) {
r_list_free (list);
return 0;
}
if (!kind) kind = 'v'; // by default show vars
varlist = sdb_get (DB, sdb_fmt (0, "fcn.0x%"PFMT64x".%c",
fcn->addr, kind), 0);
if (varlist) {
char *next, *ptr = varlist;
if (varlist && *varlist) {
do {
char *word = sdb_anext (ptr, &next);
char *vardef = sdb_get (DB, sdb_fmt (1,
"var.0x%"PFMT64x".%c.%s",
fcn->addr, kind, word), 0);
if (vardef) {
count ++;
} else {
eprintf ("Cannot find '%s'\n", word);
}
ptr = next;
} while (next);
}
}
free (varlist);
return count;
}
R_API RList *r_anal_var_list(RAnal *a, RAnalFunction *fcn, int kind) {
char *varlist;
RList *list = r_list_new ();
if (!a || !fcn)
return list;
if (!kind) kind = 'v'; // by default show vars
varlist = sdb_get (DB, sdb_fmt (0, "fcn.0x%"PFMT64x".%c",
fcn->addr, kind), 0);
if (varlist) {
char *next, *ptr = varlist;
if (varlist && *varlist) {
do {
struct VarType vt;
char *word = sdb_anext (ptr, &next);
char *vardef = sdb_get (DB, sdb_fmt (1,
"var.0x%"PFMT64x".%c.%s",
fcn->addr, kind, word), 0);
int delta = atoi (word+2);
if (vardef) {
sdb_fmt_init (&vt, SDB_VARTYPE_FMT);
sdb_fmt_tobin (vardef, SDB_VARTYPE_FMT, &vt);
RAnalVar *av;
av = R_NEW0 (RAnalVar);
av->delta = delta;
av->kind = kind;
av->name = strdup (vt.name);
av->size = vt.size;
av->type = strdup (vt.type);
r_list_append (list, av);
sdb_fmt_free (&vt, SDB_VARTYPE_FMT);
free (vardef);
} else {
eprintf ("Cannot find '%s'\n", word);
}
ptr = next;
} while (next);
}
}
free (varlist);
list->free = (RListFree)r_anal_var_free;
return list;
}
static int var_comparator (const RAnalVar *a, const RAnalVar *b){
//avoid NULL dereference
if (a && b)
return a->delta > b->delta;
return false;
}
R_API void r_anal_var_list_show(RAnal *anal, RAnalFunction *fcn, int kind, int mode) {
RList *list = r_anal_var_list(anal, fcn, kind);
r_list_sort (list, (RListComparator)var_comparator);
RAnalVar *var;
RListIter *iter;
if (mode=='j')
anal->cb_printf ("[");
r_list_foreach (list, iter, var) {
if (var->kind == kind) {
switch (mode) {
case '*':
// we cant express all type info here :(
anal->cb_printf ("af%c %d %s %s @ 0x%"PFMT64x"\n",
kind, var->delta,
var->name, var->type, fcn->addr);
break;
case 'j':
anal->cb_printf ("{\"name\":\"%s\","
"\"kind\":\"%s\",\"type\":\"%s\",\"ref\":\"%s%s0x%x\"}",
var->name, var->kind=='v'?"var":"arg", var->type,
anal->reg->name[R_REG_NAME_BP],
(var->kind=='v')?"-":"+", var->delta);
if (iter->n) anal->cb_printf (",");
break;
default:
anal->cb_printf ("%s %s %s @ %s%s0x%x\n",
kind=='v'?"var":"arg",
var->type, var->name,
anal->reg->name[R_REG_NAME_BP],
(kind=='v')?"-":"+",
var->delta);
}
}
}
if (mode=='j')
anal->cb_printf ("]\n");
r_list_free (list);
}