64 results about "Relocation" patented technology

The invention discloses an application loading method and device. The method comprises specific steps of selecting storage space for storing preset data segments in executable files of applications in a programmable read-only memory; copying the preset data segments to the memory and relocating the preset data segments based on an initial address of the storage space; copying the relocated preset data segments to the storage space by means of the method and the device, code ports of the executable files are relocated in the memory, the relocated code portions are then written back into the programmable read-only memory, and accordingly relocation of the code portions can be completed only through once erasing operation on storage blocks, and system overheads and loss of the programmable read-only memory in the application loading process are reduced.

The invention provides a program dynamic loading method, a program dynamic loading device and a storage medium. The method comprises the following steps: compiling: employing compiling parameters to compile a source code into an address-independent program file; performing relocation preprocessing: calculating a relocation address and a logic address needing to be filled into the relocation address for the program file according to the relocation item type after compiling is completed, and downloading the preprocessed program file to any position of FLASH; and loading: loading data required byprogram operation based on the calculated relocation address and the logic address needing to be filled into the relocation address, and directly operating the program file in FLASH. The method avoids the process of copying the APP file from the FLASH to the RAM, increases the application starting speed, reduces the program size, does not limit the application starting address, does not limit theapplication storage address, realizes direct operation of the APP on FLASH, is suitable for being operated on small devices such as an MCU, and supports debugging of the dynamically loaded APP.

The invention belongs to the field of software transplantation, and particularly relates to a dynamic and static fusion binary translation method and system based on a dynamic link library. The methodincludes: dividing a program by taking a function as a unit, and if the function is a third-party library function, executing the program in a local library replacement mode; if the indirect jump branch instruction exists in the function, placing the function in a dynamic translator part for translation execution, and if the indirect jump branch instruction does not exist in the function, statically translating the function by taking a basic block as a unit, recording relocation information translated by the function, and generating a function relocation information table; analyzing and optimizing the translated target code according to the static analysis information and the relocation information, and generating a dynamic link library for calling the target program in the dynamic execution process; and during dynamic execution, preferentially executing the optimized function according to the relocation information table and the dynamic link library. According to the method, the advantages of static binary translation offline optimization are fully utilized, codes needing to be translated and optimized in the dynamic execution period are statically executed, translation expenditure is reduced, and execution efficiency is improved.

The invention relates to an equipment relocation error recovery method and device, computer equipment and a storage medium, and the method comprises the steps: when a relocation function needs to be started, caching a global map before relocation as a backup, and enabling the equipment to work according to a position determined by relocation, and continuously detecting whether the previous relocation position has an error or not in the operation process, if so, deleting the updated global map based on the position after relocation, restoring to the backup global map before relocation, relocating again according to the global map before relocation, and updating the position of the equipment so as to recover the relocation error of the equipment.

The invention provides a hot patch generation method and device, and a server. A comparison file generated based on a comparison result obtained in advance comprises a target structure variable associated with a changed _jump_table segment in the _jump_table segment of a second target file, and relocation information of a specified address in the target structure variable; and based on the comparison file, generating a hot patch file containing the relocation information of the specified address. According to the method, a comparison file comprises a target structural body variable associatedwith a changed _jump_table segment and relocation information of a related specified address; the hot patch file generated on the basis of the comparison file also contains the correct relocation information of the specified address, the incidence relation between the hot patch file and the original module can be kept through the relocation information, and the correctness of code logic in the hotpatch file is guaranteed.

The invention relates to an equipment relocation operation recovery method and device, computer equipment and a storage medium. The method comprises the following steps: when the method detects that the equipment moves, recording an old operation virtual unit where the equipment moves and an original position point, starting a relocation function, determining a new operation virtual unit where the equipment is currently located, and restarting operation on the whole operation area from the new operation virtual unit; in the continuous operation process, if operation on the adjacent operation virtual unit of the old operation virtual unit is completed, acquiring the path cost of moving from the current position to a preset driving-in point and an original position point in the old operation virtual unit; and selecting a point with the minimum path cost as the starting point, recovering the operation in the old operation virtual unit. The point with the minimum path cost is selected as the starting point for re-switching into the operation in the old operation virtual unit, so that the time consumed for recovering the operation of the old operation virtual unit can be remarkably reduced, and the equipment relocation operation efficiency is improved.

The invention discloses a computing method for an ELF file mapping base address. The method comprises: obtaining information of an ELF file, according to the information, determining the type of the ELF file, wherein the type of the ELF file includes an EXE file and a DYN file; when the type of the ELF file is the EXE file, obtaining program headers of the EXE file in sequence; determining whether the program headers satisfy a preset position condition and a section header condition; if yes, setting a virtual address of the program header as a mapping base address of the EXE file. The method distinguishes according to the type of the ELF file in an ELF base address computational process, and base addresses of two types of files of EXE and DYN are respectively calculated. The method can improve calculation precision for positions of dynamic symbol tables and relocation link process tables, greatly accelerates interception process and processing efficiency of API, and ensures accuracy for API to intercept related data.

An apparatus, method, and computer program product are provided for encrypting a function symbol with relocation. The apparatus includes a compiler module, a static linker module, and an encryptor module. The compiler module inserts sequences of instructions to decrypt function symbols to be randomized at runtime before indirect function calls. The compiler module inserts an instruction sequence at compile time to encrypt an operand register that receives a local function symbol in position-independent code (PIC), where a call or store instruction uses the register as an operand. The static linker module inserts an encoding section at link time. The encoding section includes two columns representing the sizes of function symbols in bits or bytes and the locations storing the function symbols to be encrypted at runtime. The encryptor module encrypts at runtime the function symbols whose sizes and stored memory locations are identified in the encoding section.

The invention discloses an embedded system starting method based on BootRom function extension, and relates to the technical field of chips, the method comprises the steps that an extension module is read from an external memory through BootRom and loaded into a memory, and the extension module internally comprises an operation instruction of an extension program; analyzing the extension module, running the operation instruction, and executing an extension program contained in the extension module; and after the extension program contained in the extension module is executed, returning to continue to execute the BootRom program. According to the method, an extension program is compiled into a module to be stored in an external storage device through a software relocatable code compiling technology, function extension of the BootRom is achieved in a mode of loading and running the program module, configuration information can be replaced to achieve more complex logic, dynamic adjustment of the BootRom execution process can be achieved, and the execution efficiency of the BootRom is improved. And the function expansion can be realized more flexibly in a program writing mode.

The embodiment of the invention provides a jump table searching method and device, electronic equipment and a storage medium, and relates to the technical field of electronics. The method comprises the steps of determining functions included in a target file, recognizing instructions in the functions according to an execution sequence of the instructions, recording a recognition sequence, searching and determining a target instruction corresponding to a register read by the dynamic jump instruction according to a reverse sequence of the recognition sequence when the dynamic jump instruction is recognized, and executing the dynamic jump instruction according to the target instruction. And obtaining relocation information of the target instruction and relocation information of other instructions from the target file, and determining a storage area of the jump table based on the relocation information of the target instruction and the relocation information of other instructions. When the jump table is searched, the target instruction is determined by combining the register used by the dynamic jump instruction and the execution sequence of the instruction, and the position of the jump table in the target file is determined according to the relocation information of the target instruction, so that the storage area of the jump table of the dynamic jump instruction in the target file can be rapidly determined.

The invention provides an instruction address self-adaptive relocation method and a program compiling method, an executable target file generated in a link stage of a program compiling process is usedas a source file, and the relocation method comprises the following steps: reading the executable target file and configuration information; scribing a code segment and a data segment in the executable target file; after the executable target file is divided, dividing a corresponding memory space according to the size of each segment; calculating an actual target value; and when the actual targetvalue is smaller than the set target value, performing address re-positioning on each section in the executable target file, finally performing target linking, and outputting the optimized executabletarget file.

The invention discloses an application program encasing method, which comprises the following steps: copying an executable file into a memory, splitting sections to extract a resource table, modifyinga PE head, integrating other sections into one section, placing the sections together and encrypting, adding three sections A, B and C, wherein the later two are used for storing encasing codes and repairing repositioning tables thereof, and the first is used for storing a code checking module; the second one is used for repairing the running environment of the shelled program; and the third oneis used for decompressing each segment, organizing the data of the segment A into a dll file and loading the dll file.

The invention relates to the technical field of loading of reinforced ELF files, and discloses a reinforced ELF file loading method, equipment and device, and a storage medium. The method comprises the following steps: calling a preset initialization function according to dynamic link library interface information in a reinforced ELF file; obtaining a decryption function and relocation information according to the preset initialization function; and decrypting and repositioning the reinforced ELF file according to the decryption function and the repositioning information to realize loading of the file. Dynamic link library interface information is arranged on the reinforced ELF file, a preset initialization function is called through the dynamic link library interface information to obtain the decryption function and the repositioning information, and loading of the reinforced ELF file is achieved, so calling of a JNI_OnLoad function on an android platform is avoided, loading of the reinforced ELF files of all platforms can be achieved, and the purpose of improving compatibility when the reinforced ELF is loaded is achieved.