radare2/libr/anal/rtti_msvc.c

1002 lines
29 KiB
C

/* radare - LGPL - Copyright 2009-2018 - pancake, maijin, thestr4ng3r */
#include "r_anal.h"
#define NAME_BUF_SIZE 64
#define BASE_CLASSES_MAX 32
typedef struct rtti_complete_object_locator_t {
ut32 signature;
ut32 vtable_offset; // offset of the vtable within class
ut32 cd_offset; // constructor displacement offset
ut32 type_descriptor_addr; // only a relative offset for 64bit
ut32 class_descriptor_addr; // only a relative offset for 64bit
ut32 object_base; // only for 64bit, see rtti_msvc_read_complete_object_locator()
} rtti_complete_object_locator;
typedef struct rtti_class_hierarchy_descriptor_t {
ut32 signature;
ut32 attributes; // bit 0 set = multiple inheritance, bit 1 set = virtual inheritance
ut32 num_base_classes;
ut32 base_class_array_addr; // only a relative offset for 64bit
} rtti_class_hierarchy_descriptor;
typedef struct rtti_base_class_descriptor_t {
ut32 type_descriptor_addr; // only a relative offset for 64bit
ut32 num_contained_bases;
struct {
st32 mdisp; // member displacement
st32 pdisp; // vbtable displacement
st32 vdisp; // displacement inside vbtable
} where;
ut32 attributes;
} rtti_base_class_descriptor;
typedef struct rtti_type_descriptor_t {
ut64 vtable_addr;
ut64 spare;
char *name;
} rtti_type_descriptor;
static void rtti_type_descriptor_fini(rtti_type_descriptor *td) {
free (td->name);
td->name = NULL;
}
static inline ut64 rtti_msvc_addr(RVTableContext *context, ut64 col_addr, ut64 col_base, ut32 addr) {
if (context->word_size != 8) {
return addr;
}
return addr + (col_addr - col_base);
}
static bool rtti_msvc_read_complete_object_locator(RVTableContext *context, ut64 addr, rtti_complete_object_locator *col) {
if (addr == UT64_MAX) {
return false;
}
ut8 buf[6 * sizeof (ut32)];
int colSize = 5 * sizeof (ut32);
if (context->word_size == 8) {
colSize += sizeof(ut32);
}
if (colSize > sizeof (buf)) {
return false;
}
if (!context->anal->iob.read_at (context->anal->iob.io, addr, buf, colSize)) {
return false;
}
ut32 (*read_at_32)(const void *src, size_t offset) = context->anal->big_endian ? r_read_at_be32 : r_read_at_le32;
col->signature = read_at_32 (buf, 0);
col->vtable_offset = read_at_32 (buf, 4);
col->cd_offset = read_at_32 (buf, 8);
int offsetSize = R_MIN (context->word_size, 4);
col->type_descriptor_addr = (ut32) r_read_ble (buf + 12, (bool) context->anal->big_endian, offsetSize * 8);
col->class_descriptor_addr = (ut32) r_read_ble (buf + 12 + offsetSize, (bool) context->anal->big_endian, offsetSize * 8);
if (context->word_size == 8) {
// 64bit is special:
// Type Descriptor and Class Hierarchy Descriptor addresses are computed
// by 32 bit values *(col+12) + *(col+0x14)
// and *(col+16) + *(col+0x14) respectively
col->object_base = read_at_32 (buf, 20);
} else {
col->object_base = 0;
}
return true;
}
static bool rtti_msvc_read_class_hierarchy_descriptor(RVTableContext *context, ut64 addr, rtti_class_hierarchy_descriptor *chd) {
if (addr == UT64_MAX) {
return false;
}
ut8 buf[4 * sizeof (ut32)];
int chdSize = 3 * sizeof (ut32) + R_MIN (4, context->word_size);
if (chdSize > sizeof (buf)) {
return false;
}
if (!context->anal->iob.read_at (context->anal->iob.io, addr, buf, chdSize)) {
return false;
}
ut32 (*read_at_32)(const void *src, size_t offset) = context->anal->big_endian ? r_read_at_be32 : r_read_at_le32;
chd->signature = read_at_32 (buf, 0);
chd->attributes = read_at_32 (buf, 4);
chd->num_base_classes = read_at_32 (buf, 8);
if (context->word_size <= 4) {
chd->base_class_array_addr = (ut32) r_read_ble (buf + 12, (bool) context->anal->big_endian, context->word_size * 8);
} else {
// 64bit is special, like in Complete Object Locator.
// Only the offset from the base from Complete Object Locator
// is contained in Class Hierarchy Descriptor
chd->base_class_array_addr = read_at_32 (buf, 12);
}
return true;
}
static ut64 rtti_msvc_base_class_descriptor_size(RVTableContext *context) {
return context->word_size + 5 * sizeof (ut32);
}
static bool rtti_msvc_read_base_class_descriptor(RVTableContext *context, ut64 addr, rtti_base_class_descriptor *bcd) {
if (addr == UT64_MAX) {
return false;
}
ut8 buf[sizeof (ut64) + 5 * sizeof (ut32)];
int bcdSize = (int) rtti_msvc_base_class_descriptor_size (context);
if (bcdSize > sizeof (buf)) {
return false;
}
if (!context->anal->iob.read_at (context->anal->iob.io, addr, buf, bcdSize)) {
return false;
}
ut32 (*read_at_32)(const void *src, size_t offset) = context->anal->big_endian ? r_read_at_be32 : r_read_at_le32;
int typeDescriptorAddrSize = R_MIN (context->word_size, 4);
bcd->type_descriptor_addr = (ut32) r_read_ble (buf, (bool) context->anal->big_endian, typeDescriptorAddrSize * 8);
size_t offset = (size_t) typeDescriptorAddrSize;
bcd->num_contained_bases = read_at_32 (buf, offset);
bcd->where.mdisp = read_at_32 (buf, offset + sizeof (ut32));
bcd->where.pdisp = read_at_32 (buf, offset + 2 * sizeof (ut32));
bcd->where.vdisp = read_at_32 (buf, offset + 3 * sizeof (ut32));
bcd->attributes = read_at_32 (buf, offset + 4 * sizeof (ut32));
return true;
}
static RList *rtti_msvc_read_base_class_array(RVTableContext *context, ut32 num_base_classes, ut64 base, ut32 offset) {
if (base == UT64_MAX || offset == UT32_MAX || num_base_classes == UT32_MAX) {
return NULL;
}
RList *ret = r_list_newf (free);
if (!ret) {
return NULL;
}
ut64 addr = base + offset;
ut64 stride = R_MIN (context->word_size, 4);
if (num_base_classes > BASE_CLASSES_MAX) {
if (context->anal->verbose) {
eprintf ("WARNING: Length of base class array at 0x%08"PFMT64x" exceeds %d.\n", addr, BASE_CLASSES_MAX);
}
num_base_classes = BASE_CLASSES_MAX;
}
r_cons_break_push (NULL, NULL);
while (num_base_classes > 0) {
if (r_cons_is_breaked ()) {
break;
}
ut64 bcdAddr;
if (context->word_size <= 4) {
if (!context->read_addr (context->anal, addr, &bcdAddr)) {
break;
}
if (bcdAddr == UT32_MAX) {
break;
}
} else {
// special offset calculation for 64bit
ut8 tmp[4] = {0};
if (!context->anal->iob.read_at(context->anal->iob.io, addr, tmp, 4)) {
r_list_free (ret);
return NULL;
}
ut32 (*read_32)(const void *src) = context->anal->big_endian ? r_read_be32 : r_read_le32;
ut32 bcdOffset = read_32 (tmp);
if (bcdOffset == UT32_MAX) {
break;
}
bcdAddr = base + bcdOffset;
}
rtti_base_class_descriptor *bcd = malloc (sizeof (rtti_base_class_descriptor));
if (!bcd) {
break;
}
if (!rtti_msvc_read_base_class_descriptor (context, bcdAddr, bcd)) {
free (bcd);
break;
}
r_list_append (ret, bcd);
addr += stride;
num_base_classes--;
}
r_cons_break_pop ();
if (num_base_classes > 0) {
// there was an error in the loop above
r_list_free (ret);
return NULL;
}
return ret;
}
static bool rtti_msvc_read_type_descriptor(RVTableContext *context, ut64 addr, rtti_type_descriptor *td) {
if (addr == UT64_MAX) {
return false;
}
if (!context->read_addr (context->anal, addr, &td->vtable_addr)) {
return false;
}
if (!context->read_addr (context->anal, addr + context->word_size, &td->spare)) {
return false;
}
ut64 nameAddr = addr + 2 * context->word_size;
ut8 buf[NAME_BUF_SIZE];
ut64 bufOffset = 0;
size_t nameLen = 0;
bool endFound = false;
bool endInvalid = false;
while (1) {
context->anal->iob.read_at (context->anal->iob.io, nameAddr + bufOffset, buf, sizeof (buf));
int i;
for (i=0; i<sizeof (buf); i++) {
if (buf[i] == '\0') {
endFound = true;
break;
}
if (buf[i] == 0xff) {
endInvalid = true;
break;
}
nameLen++;
}
if (endFound || endInvalid) {
break;
}
bufOffset += sizeof (buf);
}
if (endInvalid) {
return false;
}
td->name = malloc (nameLen + 1);
if (!td->name) {
return false;
}
if (bufOffset == 0) {
memcpy (td->name, buf, nameLen + 1);
} else {
context->anal->iob.read_at (context->anal->iob.io, nameAddr,
(ut8 *)td->name, (int) (nameLen + 1));
}
return true;
}
static void rtti_msvc_print_complete_object_locator(rtti_complete_object_locator *col, ut64 addr, const char *prefix) {
r_cons_printf ("%sComplete Object Locator at 0x%08"PFMT64x":\n"
"%s\tsignature: %#x\n"
"%s\tvftableOffset: %#x\n"
"%s\tcdOffset: %#x\n"
"%s\ttypeDescriptorAddr: 0x%08"PFMT32x"\n"
"%s\tclassDescriptorAddr: 0x%08"PFMT32x"\n",
prefix, addr,
prefix, col->signature,
prefix, col->vtable_offset,
prefix, col->cd_offset,
prefix, col->type_descriptor_addr,
prefix, col->class_descriptor_addr);
r_cons_printf ("%s\tobjectBase: 0x%08"PFMT32x"\n\n",
prefix, col->object_base);
}
static void rtti_msvc_print_complete_object_locator_json(rtti_complete_object_locator *col) {
r_cons_printf ("{\"signature\":%"PFMT32u",\"vftable_offset\":%"PFMT32u",\"cd_offset\":%"PFMT32u","
"\"type_desc_addr\":%"PFMT32u",\"class_desc_addr\":%"PFMT32u",\"object_base\":%"PFMT32u"}",
col->signature, col->vtable_offset, col->cd_offset, col->type_descriptor_addr,
col->class_descriptor_addr, col->object_base);
}
static void rtti_msvc_print_type_descriptor(rtti_type_descriptor *td, ut64 addr, const char *prefix) {
r_cons_printf ("%sType Descriptor at 0x%08"PFMT64x":\n"
"%s\tvtableAddr: 0x%08"PFMT64x"\n"
"%s\tspare: 0x%08"PFMT64x"\n"
"%s\tname: %s\n\n",
prefix, addr,
prefix, td->vtable_addr,
prefix, td->spare,
prefix, td->name);
}
static void rtti_msvc_print_type_descriptor_json(rtti_type_descriptor *td) {
r_cons_printf ("{\"vtable_addr\":%"PFMT32u",\"spare\":%"PFMT32u",\"name\":\"%s\"}",
td->vtable_addr, td->spare, td->name);
}
static void rtti_msvc_print_class_hierarchy_descriptor(rtti_class_hierarchy_descriptor *chd, ut64 addr, const char *prefix) {
r_cons_printf ("%sClass Hierarchy Descriptor at 0x%08"PFMT64x":\n"
"%s\tsignature: %#x\n"
"%s\tattributes: %#x\n"
"%s\tnumBaseClasses: %#x\n"
"%s\tbaseClassArrayAddr: 0x%08"PFMT32x"\n\n",
prefix, addr,
prefix, chd->signature,
prefix, chd->attributes,
prefix, chd->num_base_classes,
prefix, chd->base_class_array_addr);
}
static void rtti_msvc_print_class_hierarchy_descriptor_json(rtti_class_hierarchy_descriptor *chd) {
r_cons_printf ("{\"signature\":%"PFMT32u",\"attributes\":%"PFMT32u",\"num_base_classes\":%"PFMT32u","
"\"base_class_array_addr\":%"PFMT32u"}",
chd->signature, chd->attributes, chd->num_base_classes, chd->base_class_array_addr);
}
static void rtti_msvc_print_base_class_descriptor(rtti_base_class_descriptor *bcd, const char *prefix) {
r_cons_printf ("%sBase Class Descriptor:\n"
"%s\ttypeDescriptorAddr: 0x%08"PFMT32x"\n"
"%s\tnumContainedBases: %#x\n"
"%s\twhere:\n"
"%s\t\tmdisp: %d\n"
"%s\t\tpdisp: %d\n"
"%s\t\tvdisp: %d\n"
"%s\tattributes: %#x\n\n",
prefix,
prefix, bcd->type_descriptor_addr,
prefix, bcd->num_contained_bases,
prefix,
prefix, bcd->where.mdisp,
prefix, bcd->where.pdisp,
prefix, bcd->where.vdisp,
prefix, bcd->attributes);
}
static void rtti_msvc_print_base_class_descriptor_json(rtti_base_class_descriptor *bcd) {
r_cons_printf ("{\"type_desc_addr\":%"PFMT32u",\"num_contained_bases\":%"PFMT32u","
"\"where\":{\"mdisp\":%"PFMT32d",\"pdisp\":%"PFMT32d",\"vdisp\":%"PFMT32d"},"
"\"attributes\":%"PFMT32u"}",
bcd->type_descriptor_addr, bcd->num_contained_bases,
bcd->where.mdisp, bcd->where.pdisp, bcd->where.vdisp, bcd->attributes);
}
/**
* Demangle a class name as found in MSVC RTTI type descriptors.
*
* Examples:
* .?AVClassA@@
* => ClassA
* .?AVClassInInnerNamespace@InnerNamespace@OuterNamespace@@
* => OuterNamespace::InnerNamespace::AVClassInInnerNamespace
*/
R_API char *r_anal_rtti_msvc_demangle_class_name(const char *name) {
if (!name) {
return NULL;
}
size_t original_len = strlen (name);
if (original_len < 7
|| (strncmp (name, ".?AV", 4) != 0 && strncmp (name, ".?AU", 4) != 0)
|| strncmp (name + original_len - 2, "@@", 2) != 0) {
return NULL;
}
char *ret = malloc ((original_len - 6) * 2 + 1);
if (!ret) {
return NULL;
}
char *c = ret;
const char *oc = name + original_len - 3;
size_t part_len = 0;
while (oc >= name + 4) {
if (*oc == '@') {
memcpy (c, oc + 1, part_len);
c += part_len;
*c++ = ':';
*c++ = ':';
part_len = 0;
} else {
part_len++;
}
oc--;
}
memcpy (c, oc + 1, part_len);
c[part_len] = '\0';
return ret;
}
R_API void r_anal_rtti_msvc_print_complete_object_locator(RVTableContext *context, ut64 addr, int mode) {
rtti_complete_object_locator col;
if (!rtti_msvc_read_complete_object_locator (context, addr, &col)) {
eprintf ("Failed to parse Complete Object Locator at 0x%08"PFMT64x"\n", addr);
return;
}
if (mode == 'j') {
rtti_msvc_print_complete_object_locator_json (&col);
} else {
rtti_msvc_print_complete_object_locator (&col, addr, "");
}
}
R_API void r_anal_rtti_msvc_print_type_descriptor(RVTableContext *context, ut64 addr, int mode) {
rtti_type_descriptor td = { 0 };
if (!rtti_msvc_read_type_descriptor (context, addr, &td)) {
eprintf ("Failed to parse Type Descriptor at 0x%08"PFMT64x"\n", addr);
return;
}
if (mode == 'j') {
rtti_msvc_print_type_descriptor_json (&td);
} else {
rtti_msvc_print_type_descriptor (&td, addr, "");
}
rtti_type_descriptor_fini (&td);
}
R_API void r_anal_rtti_msvc_print_class_hierarchy_descriptor(RVTableContext *context, ut64 addr, int mode) {
rtti_class_hierarchy_descriptor chd;
if (!rtti_msvc_read_class_hierarchy_descriptor (context, addr, &chd)) {
eprintf ("Failed to parse Class Hierarchy Descriptor at 0x%08"PFMT64x"\n", addr);
return;
}
if (mode == 'j') {
rtti_msvc_print_class_hierarchy_descriptor_json (&chd);
} else {
rtti_msvc_print_class_hierarchy_descriptor (&chd, addr, "");
}
}
R_API void r_anal_rtti_msvc_print_base_class_descriptor(RVTableContext *context, ut64 addr, int mode) {
rtti_base_class_descriptor bcd;
if (!rtti_msvc_read_base_class_descriptor (context, addr, &bcd)) {
eprintf ("Failed to parse Base Class Descriptor at 0x%08"PFMT64x"\n", addr);
return;
}
if (mode == 'j') {
rtti_msvc_print_base_class_descriptor_json (&bcd);
} else {
rtti_msvc_print_base_class_descriptor (&bcd, "");
}
}
static bool rtti_msvc_print_complete_object_locator_recurse(RVTableContext *context, ut64 atAddress, int mode, bool strict) {
bool use_json = mode == 'j';
ut64 colRefAddr = atAddress - context->word_size;
ut64 colAddr;
if (!context->read_addr (context->anal, colRefAddr, &colAddr)) {
return false;
}
// complete object locator
rtti_complete_object_locator col;
if (!rtti_msvc_read_complete_object_locator (context, colAddr, &col)) {
if (!strict) {
eprintf ("Failed to parse Complete Object Locator at 0x%08"PFMT64x" (referenced from 0x%08"PFMT64x")\n", colAddr, colRefAddr);
}
return false;
}
// type descriptor
ut64 typeDescriptorAddr = rtti_msvc_addr (context, colAddr, col.object_base, col.type_descriptor_addr);
rtti_type_descriptor td = { 0 };
if (!rtti_msvc_read_type_descriptor (context, typeDescriptorAddr, &td)) {
if (!strict) {
eprintf ("Failed to parse Type Descriptor at 0x%08"PFMT64x"\n", typeDescriptorAddr);
}
return false;
}
// class hierarchy descriptor
ut64 classHierarchyDescriptorAddr = rtti_msvc_addr (context, colAddr, col.object_base, col.class_descriptor_addr);
rtti_class_hierarchy_descriptor chd;
if (!rtti_msvc_read_class_hierarchy_descriptor (context, classHierarchyDescriptorAddr, &chd)) {
if (!strict) {
eprintf ("Failed to parse Class Hierarchy Descriptor at 0x%08"PFMT64x"\n", classHierarchyDescriptorAddr);
}
rtti_type_descriptor_fini (&td);
return false;
}
ut64 base = chd.base_class_array_addr;
ut32 baseClassArrayOffset = 0;
if (context->word_size == 8) {
base = colAddr - col.object_base;
baseClassArrayOffset = chd.base_class_array_addr;
}
RList *baseClassArray = rtti_msvc_read_base_class_array (context, chd.num_base_classes, base, baseClassArrayOffset);
if (!baseClassArray) {
if (!strict) {
eprintf ("Failed to parse Base Class Array starting at 0x%08"PFMT64x"\n", base + baseClassArrayOffset);
}
rtti_type_descriptor_fini (&td);
return false;
}
// print
if (use_json) {
r_cons_print ("{\"complete_object_locator\":");
rtti_msvc_print_complete_object_locator_json (&col);
r_cons_print (",\"type_desc\":");
rtti_msvc_print_type_descriptor_json (&td);
r_cons_print (",\"class_hierarchy_desc\":");
rtti_msvc_print_class_hierarchy_descriptor_json (&chd);
r_cons_print (",\"base_classes\":[");
} else {
rtti_msvc_print_complete_object_locator (&col, colAddr, "");
rtti_msvc_print_type_descriptor (&td, typeDescriptorAddr, "\t");
rtti_msvc_print_class_hierarchy_descriptor (&chd, classHierarchyDescriptorAddr, "\t");
}
// base classes
bool json_first = true;
RListIter *bcdIter;
rtti_base_class_descriptor *bcd;
r_list_foreach (baseClassArray, bcdIter, bcd) {
if (use_json) {
if (json_first) {
r_cons_print ("{\"desc\":");
json_first = false;
} else {
r_cons_print (",{\"desc\":");
}
}
if (use_json) {
rtti_msvc_print_base_class_descriptor_json (bcd);
} else {
rtti_msvc_print_base_class_descriptor (bcd, "\t\t");
}
ut64 baseTypeDescriptorAddr = rtti_msvc_addr (context, colAddr, col.object_base, bcd->type_descriptor_addr);
rtti_type_descriptor btd = { 0 };
if (rtti_msvc_read_type_descriptor (context, baseTypeDescriptorAddr, &btd)) {
if (use_json) {
r_cons_print (",\"type_desc\":");
rtti_msvc_print_type_descriptor_json (&btd);
} else {
rtti_msvc_print_type_descriptor (&btd, baseTypeDescriptorAddr, "\t\t\t");
}
rtti_type_descriptor_fini (&btd);
} else {
if (!strict) {
eprintf ("Failed to parse Type Descriptor at 0x%08"PFMT64x"\n", baseTypeDescriptorAddr);
}
}
if(use_json) {
r_cons_print ("}");
}
}
if (use_json) {
r_cons_print ("]");
}
if (use_json) {
r_cons_print ("}");
}
rtti_type_descriptor_fini (&td);
return true;
}
R_API bool r_anal_rtti_msvc_print_at_vtable(RVTableContext *context, ut64 addr, int mode, bool strict) {
return rtti_msvc_print_complete_object_locator_recurse (context, addr, mode, strict);
}
typedef struct recovery_type_descriptor_t RecoveryTypeDescriptor;
typedef struct recovery_base_descriptor_t {
rtti_base_class_descriptor *bcd;
RecoveryTypeDescriptor *td;
} RecoveryBaseDescriptor;
typedef struct recovery_complete_object_locator_t {
ut64 addr;
bool valid;
RVTableInfo *vtable;
rtti_complete_object_locator col;
RecoveryTypeDescriptor *td;
rtti_class_hierarchy_descriptor chd;
RList *bcd; // <rtti_base_class_descriptor>
RVector base_td; // <RecoveryBaseDescriptor>
} RecoveryCompleteObjectLocator;
RecoveryCompleteObjectLocator *recovery_complete_object_locator_new() {
RecoveryCompleteObjectLocator *col = R_NEW0 (RecoveryCompleteObjectLocator);
if (!col) {
return NULL;
}
r_vector_init (&col->base_td, sizeof(RecoveryBaseDescriptor), NULL, NULL);
return col;
}
void recovery_complete_object_locator_free(RecoveryCompleteObjectLocator *col) {
if (!col) {
return;
}
r_list_free (col->bcd);
r_vector_clear (&col->base_td);
free (col);
}
struct recovery_type_descriptor_t {
ut64 addr;
bool valid;
rtti_type_descriptor td;
RecoveryCompleteObjectLocator *col;
};
RecoveryTypeDescriptor *recovery_type_descriptor_new() {
RecoveryTypeDescriptor *td = R_NEW (RecoveryTypeDescriptor);
if (!td) {
return NULL;
}
td->addr = 0;
td->valid = false;
memset (&td->td, 0, sizeof (td->td));
td->col = NULL;
//td->vtable = NULL;
return td;
}
void recovery_type_descriptor_free(RecoveryTypeDescriptor *td) {
if (!td) {
return;
}
rtti_type_descriptor_fini (&td->td);
free (td);
}
typedef struct rtti_msvc_anal_context_t {
RVTableContext *vt_context;
RPVector vtables; // <RVTableInfo>
RPVector complete_object_locators; // <RecoveryCompleteObjectLocator>
HtUP *addr_col; // <ut64, RecoveryCompleteObjectLocator *>
RPVector type_descriptors; // <RecoveryTypeDescriptor>
HtUP *addr_td; // <ut64, RecoveryTypeDescriptor *>
HtUP *col_td_classes; // <ut64, char *> contains already recovered classes for col (or td) addresses
} RRTTIMSVCAnalContext;
RecoveryTypeDescriptor *recovery_anal_type_descriptor(RRTTIMSVCAnalContext *context, ut64 addr, RecoveryCompleteObjectLocator *col);
RecoveryCompleteObjectLocator *recovery_anal_complete_object_locator(RRTTIMSVCAnalContext *context, ut64 addr, RVTableInfo *vtable) {
RecoveryCompleteObjectLocator *col = ht_up_find (context->addr_col, addr, NULL);
if (col) {
return col;
}
col = recovery_complete_object_locator_new ();
if (!col) {
return NULL;
}
r_pvector_push (&context->complete_object_locators, col);
ht_up_insert (context->addr_col, addr, col);
col->addr = addr;
col->valid = rtti_msvc_read_complete_object_locator (context->vt_context, addr, &col->col);
if (!col->valid) {
return col;
}
col->vtable = vtable;
ut64 td_addr = rtti_msvc_addr (context->vt_context, col->addr, col->col.object_base, col->col.type_descriptor_addr);
col->td = recovery_anal_type_descriptor (context, td_addr, col);
if (!col->td->valid) {
col->valid = false;
return col;
}
col->td->col = col;
ut64 chd_addr = rtti_msvc_addr (context->vt_context, col->addr, col->col.object_base, col->col.class_descriptor_addr);
col->valid &= rtti_msvc_read_class_hierarchy_descriptor (context->vt_context, chd_addr, &col->chd);
if (!col->valid) {
return col;
}
ut64 base = col->chd.base_class_array_addr;
ut32 baseClassArrayOffset = 0;
if (context->vt_context->word_size == 8) {
base = col->addr - col->col.object_base;
baseClassArrayOffset = col->chd.base_class_array_addr;
}
col->bcd = rtti_msvc_read_base_class_array (context->vt_context, col->chd.num_base_classes, base, baseClassArrayOffset);
if (!col->bcd) {
col->valid = false;
return col;
}
r_vector_reserve (&col->base_td, (size_t)col->bcd->length);
RListIter *bcdIter;
rtti_base_class_descriptor *bcd;
r_list_foreach (col->bcd, bcdIter, bcd) {
ut64 base_td_addr = rtti_msvc_addr (context->vt_context, col->addr, col->col.object_base, bcd->type_descriptor_addr);
RecoveryTypeDescriptor *td = recovery_anal_type_descriptor (context, base_td_addr, NULL);
if (td == col->td) {
continue;
}
if (!td->valid) {
if (context->vt_context->anal->verbose) {
eprintf ("Warning: type descriptor of base is invalid.\n");
}
continue;
}
RecoveryBaseDescriptor *base_desc = r_vector_push (&col->base_td, NULL);
base_desc->bcd = bcd;
base_desc->td = td;
}
return col;
}
RecoveryTypeDescriptor *recovery_anal_type_descriptor(RRTTIMSVCAnalContext *context, ut64 addr, RecoveryCompleteObjectLocator *col) {
RecoveryTypeDescriptor *td = ht_up_find (context->addr_td, addr, NULL);
if (td) {
if (col != NULL) {
td->col = col;
}
return td;
}
td = recovery_type_descriptor_new ();
if (!td) {
return NULL;
}
r_pvector_push (&context->type_descriptors, td);
ht_up_insert (context->addr_td, addr, td);
td->addr = addr;
td->valid = rtti_msvc_read_type_descriptor (context->vt_context, addr, &td->td);
if (!td->valid) {
return td;
}
td->col = col;
return td;
}
static char *unique_class_name(RAnal *anal, const char *original_name) {
if (!r_anal_class_exists (anal, original_name)) {
return strdup (original_name);
}
char *name = NULL;
if (anal->verbose) {
eprintf ("Warning: class name %s already taken!\n", original_name);
}
int i = 1;
do {
free (name);
name = r_str_newf ("%s.%d", original_name, i++);
if (!name) {
return NULL;
}
} while (r_anal_class_exists (anal, name));
return name;
}
static void recovery_apply_vtable(RAnal *anal, const char *class_name, RVTableInfo *vtable_info) {
if (!vtable_info) {
return;
}
RAnalVTable vtable;
vtable.id = NULL;
vtable.offset = 0;
vtable.addr = vtable_info->saddr;
r_anal_class_vtable_set (anal, class_name, &vtable);
r_anal_class_vtable_fini (&vtable);
RVTableMethodInfo *vmeth;
r_vector_foreach (&vtable_info->methods, vmeth) {
RAnalMethod meth;
meth.addr = vmeth->addr;
meth.vtable_offset = vmeth->vtable_offset;
meth.name = r_str_newf ("virtual_%d", meth.vtable_offset);
r_anal_class_method_set (anal, class_name, &meth);
r_anal_class_method_fini (&meth);
}
}
static const char *recovery_apply_complete_object_locator(RRTTIMSVCAnalContext *context, RecoveryCompleteObjectLocator *col);
static const char *recovery_apply_type_descriptor(RRTTIMSVCAnalContext *context, RecoveryTypeDescriptor *td);
static void recovery_apply_bases(RRTTIMSVCAnalContext *context, const char *class_name, RVector *base_descs) {
RecoveryBaseDescriptor *base_desc;
r_vector_foreach (base_descs, base_desc) {
RecoveryTypeDescriptor *base_td = base_desc->td;
if (!base_td->valid) {
eprintf ("Warning Base td is invalid!\n");
continue;
}
const char *base_class_name;
if (!base_td->col) {
if (context->vt_context->anal->verbose) {
eprintf ("Warning: Base td %s has no col. Falling back to recovery from td only.\n", base_td->td.name);
}
base_class_name = recovery_apply_type_descriptor (context, base_td);
} else {
base_class_name = recovery_apply_complete_object_locator (context, base_td->col);
}
if (!base_class_name) {
if (context->vt_context->anal->verbose) {
eprintf ("Failed to convert !base td->col or td to a class\n");
}
continue;
}
RAnalBaseClass base;
base.id = NULL;
base.offset = (ut64)base_desc->bcd->where.mdisp;
base.class_name = strdup (base_class_name);
r_anal_class_base_set (context->vt_context->anal, class_name, &base);
r_anal_class_base_fini (&base);
}
}
static const char *recovery_apply_complete_object_locator(RRTTIMSVCAnalContext *context, RecoveryCompleteObjectLocator *col) {
if (!col->valid) {
return NULL;
}
if (!col->td) {
if (context->vt_context->anal->verbose) {
eprintf ("Warning: no td for col at 0x%"PFMT64x"\n", col->addr);
}
return NULL;
}
RAnal *anal = context->vt_context->anal;
const char *existing = ht_up_find (context->col_td_classes, col->addr, NULL);
if (existing != NULL) {
return existing;
}
char *name = r_anal_rtti_msvc_demangle_class_name (col->td->td.name);
if (!name) {
if (context->vt_context->anal->verbose) {
eprintf ("Failed to demangle a class name: \"%s\"\n", col->td->td.name);
}
name = strdup (col->td->td.name);
if (!name) {
return NULL;
}
}
char *tmp = name;
name = unique_class_name (anal, name);
free (tmp);
if (!name) {
return NULL;
}
r_anal_class_create (anal, name);
ht_up_insert (context->col_td_classes, col->addr, name);
recovery_apply_vtable (anal, name, col->vtable);
recovery_apply_bases (context, name, &col->base_td);
return name;
}
static const char *recovery_apply_type_descriptor(RRTTIMSVCAnalContext *context, RecoveryTypeDescriptor *td) {
if (!td->valid) {
return NULL;
}
RAnal *anal = context->vt_context->anal;
const char *existing = ht_up_find (context->col_td_classes, td->addr, NULL);
if (existing != NULL) {
return existing;
}
char *name = r_anal_rtti_msvc_demangle_class_name (td->td.name);
if (!name) {
if (context->vt_context->anal->verbose) {
eprintf("Failed to demangle a class name: \"%s\"\n", td->td.name);
}
name = strdup (td->td.name);
if (!name) {
return NULL;
}
}
r_anal_class_create (anal, name);
ht_up_insert (context->col_td_classes, td->addr, name);
if (!td->col || !td->col->valid) {
return name;
}
recovery_apply_vtable (anal, name, td->col->vtable);
recovery_apply_bases (context, name, &td->col->base_td);
return name;
}
void str_value_free(HtPPKv *kv) {
free (kv->value);
}
R_API void r_anal_rtti_msvc_recover_all(RVTableContext *vt_context, RList *vtables) {
RRTTIMSVCAnalContext context;
context.vt_context = vt_context;
r_pvector_init (&context.vtables, (RPVectorFree)r_anal_vtable_info_free);
r_pvector_init (&context.complete_object_locators, (RPVectorFree) recovery_complete_object_locator_free);
context.addr_col = ht_up_new0 ();
r_pvector_init (&context.type_descriptors, (RPVectorFree) recovery_type_descriptor_free);
context.addr_td = ht_up_new0 ();
context.col_td_classes = ht_up_new (NULL, (HtUPKvFreeFunc)str_value_free, (HtUPCalcSizeV)strlen);
RListIter *vtableIter;
RVTableInfo *table;
r_list_foreach (vtables, vtableIter, table) {
ut64 colRefAddr = table->saddr - vt_context->word_size;
ut64 colAddr;
if (!vt_context->read_addr (vt_context->anal, colRefAddr, &colAddr)) {
continue;
}
recovery_anal_complete_object_locator (&context, colAddr, table);
}
void **it;
#if USE_TD_RECOVERY
r_pvector_foreach (&context.type_descriptors, it) {
RecoveryTypeDescriptor *td = *it;
if (!td->valid) {
continue;
}
recovery_apply_type_descriptor (&context, td);
}
#else
r_pvector_foreach (&context.complete_object_locators, it) {
RecoveryCompleteObjectLocator *col = *it;
if (!col->valid) {
continue;
}
recovery_apply_complete_object_locator (&context, col);
}
#endif
r_pvector_clear (&context.vtables);
r_pvector_clear (&context.complete_object_locators);
ht_up_free (context.addr_col);
r_pvector_clear (&context.type_descriptors);
ht_up_free (context.addr_td);
ht_up_free (context.col_td_classes);
}