Add support for the XTAC file format ##bin

Author: kohnakagawa

dist/plugins-cfg/plugins.def.cfg

@@ -138,6 +138,7 @@ bin.xcoff64
 bin.xnu_kernelcache
 bin.z64
 bin.zimg
+bin.xtac
 bin_ldr.ldr_linux
 bin_xtr.xtr_dyldcache
 bin_xtr.xtr_fatmach0

libr/bin/format/xtac/xtac.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) FFRI Security, Inc., 2023 / Author: FFRI Security, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _INCLUDE_XTAC_H_
+#define _INCLUDE_XTAC_H_
+
+#include <r_types.h>
+
+#define XTAC_MAGIC "XTAC"
+
+typedef struct x86_arm_addr_pair_t {
+	ut32 x86_rva;
+	ut32 arm64_rva;
+} X86ArmAddrPair;
+
+// NOTE: Here "pointer" means RVA from the image base of the cache file
+typedef struct r_bin_xtac_header_t {
+	ut32 magic; // signature (always "XTAC")
+	ut32 version; // version of XTAC
+	ut32 is_updated; // cache file is updated (1) or not (0)
+	ut32 ptr_to_addr_pairs; // pointer to x86 to arm address pairs
+	ut32 num_of_addr_pairs; // number of address pairs
+	ut32 ptr_to_mod_name; // pointer to module name
+	ut32 size_of_mod_name; // size of module name (in bytes)
+	ut32 ptr_to_nt_pname; // pointer to NT path name
+	ut32 size_of_nt_pname; // size of NT path name (in bytes)
+	ut32 ptr_to_head_blck_stub; // pointer to head BLCK stub
+	ut32 ptr_to_tail_blck_stub; // pointer to tail BLCK stub
+	ut32 size_of_blck_stub_code; // size of BLCK stub code (not including BLCK stub header)
+	ut32 ptr_to_xtac_linked_list_head; // pointer to the head of linked list for updating
+					   // xtac.exe uses this for accessing the location to be corrected
+	ut32 ptr_to_xtac_linked_list_tail; // pointer to the tail of linked list for updating
+} RBinXtacHeader;
+
+typedef struct r_bin_blck_stub_header_t {
+	ut32 magic; // signature (always "BLCK")
+	ut32 offset_to_next_entry; // offset to the next entry from the current BLCK stub code
+	ut32 ptr_to_next_entry; // pointer to the next BLCK stub
+	ut32 padding; // padding (always 0)
+
+	ut32 ptr_to_entry; // pointer to this entry
+} RBinBlckStubHeader;
+
+typedef struct r_bin_xtac_linked_list_entry_t {
+	ut32 meta_and_offset; // metadata (upper 8bits) and quarter of offset to next entry (lower 24bits)
+	ut32 forward_edge_addr; // x86 RVA of forward edge address
+	ut32 backward_edge_addr; // x86 RVA of backward edge address
+
+	ut32 ptr_to_entry; // pointer to this entry
+} RBinXtacLinkedListEntry;
+
+typedef struct r_bin_xtac_obj_t {
+	RBinXtacHeader *header;
+	X86ArmAddrPair *address_pairs;
+	ut16 *mod_name_u16;
+	char *mod_name_u8;
+	ut16 *nt_path_name_u16;
+	char *nt_path_name_u8;
+
+	RBuffer *b;
+	RList *blck_stubs; // RList of r_bin_bock_stub_header_t
+	RList *xtac_linked_list; // RList of r_bin_xtac_linked_list_entry_t
+	Sdb *kv;
+	bool verbose;
+	int size;
+} RBinXtacObj;
+
+#endif

libr/bin/meson.build

@@ -85,6 +85,7 @@ r_bin_sources = [
   'p/bin_xtr_xalz.c',
   'p/bin_z64.c',
   'p/bin_zimg.c',
+  'p/bin_xtac.c',
 # implementation
   'format/bflt/bflt.c',
   'format/coff/coff.c',

libr/bin/p/Makefile

@@ -23,6 +23,7 @@ FORMATS+=dex.mk fs.mk ningb.mk coff.mk xcoff64.mk ningba.mk xbe.mk zimg.mk
 FORMATS+=omf.mk cgc.mk dol.mk rel.mk nes.mk mbn.mk psxexe.mk
 FORMATS+=vsf.mk nin3ds.mk bflt.mk wasm.mk sfc.mk
 FORMATS+=mdmp.mk z64.mk qnx.mk prg.mk dmp64.mk
+FORMATS+=xtac.mk
 
 FORMATS+=xtr_dyldcache.mk
 FORMATS+=xtr_fatmach0.mk