30 results about "Segment descriptor" patented technology

A text-generation method and system includes receiving data records, such that each data record includes one or more data fields and a field value associated with each data field. A text-string is generated for each data record, such that each text-string includes one or more text-based data descriptors. Each data descriptor includes a field descriptor that defines a specific data field within the data record to which the text-string is related, and a value descriptor that defines the field value associated with the specific data field.

A processor supports a processing mode in which the address size is greater than 32 bits and the operand size may be 32 or 64 bits. The address size may be nominally indicated as 64 bits, although various embodiments of the processor may implement any address size which exceeds 32 bits, up to and including 64 bits, in the processing mode. The processing mode may be established by placing an enable indication in a control register into an enabled state and by setting a first operating mode indication and a second operating mode indication in a segment descriptor to predefined states. Other combinations of the first operating mode indication and the second operating mode indication may be used to provide compatibility modes for 32 bit and 16 bit processing compatible with the x86 processor architecture (with the enable indication remaining in the enabled state).

The present invention provides an improved method and system of improving the efficiency, and ensuring the integrity, of a data transfer in a serverless backup, or third party copy, system having one or more physical storage devices. The present invention provides improvements to the processing of serverless copy, or EXTENDED COPY, commands, and transfers of data associated with such commands. These improvements increase the speed at which such commands are executed and completed, and increase the capabilities of copy managers in serverless backup systems. The improvements also make better use of the storage devices involved in the data backup process. The method broadly includes determining a desired manner of execution of segment descriptors, or instructions, as a function of components of those instructions. Other aspects of the invention allow for execution of data segments of any size, and validation of segment descriptors and target descriptors prior to data transfer.

A data processing apparatus and method are provided for performing segmented operations. The data processing apparatus comprises a vector register store for storing vector operands, and vector processing circuitry providing N lanes of parallel processing, and arranged to perform a segmented operation on up to N data elements provided by a specified vector operand, each data element being allocated to one of the N lanes. The up to N data elements forms a plurality of segments, and performance of the segmented operation comprises performing a separate operation on the data elements of each segment, the separate operation involving interaction between the lanes containing the data elements of the associated segment. Predicate generation circuitry is responsive to a compute descriptor instruction specifying an input vector operand comprising a plurality of segment descriptors, to generate per lane predicate information used by the vector processing circuitry when performing the segmented operation to maintain a boundary between each of the plurality of segments. As a result, interaction between lanes containing data elements from different segments is prevented. This allows very effective utilisation of the lanes of parallel processing within the vector processing circuitry to be achieved.

The present invention provides an improved method and system of improving the efficiency, and ensuring the integrity, of a data transfer in a serverless backup, or third party copy, system having one or more physical storage devices. The present invention provides improvements to the processing of serverless copy, or EXTENDED COPY, commands, and transfers of data associated with such commands. These improvements increase the speed at which such commands are executed and completed, and increase the capabilities of copy managers in serverless backup systems. The improvements also make better use of the storage devices involved in the data backup process. The method broadly includes determining a desired manner of execution of segment descriptors, or instructions, as a function of components of those instructions. Other aspects of the invention allow for execution of data segments of any size, and validation of segment descriptors and target descriptors prior to data transfer.

One embodiment of the present invention performs a parallel prefix scan in a single pass that incorporates variable look-back. A parallel processing unit (PPU) subdivides a list of inputs into sequentially-ordered segments and assigns each segment to a streaming multiprocessor (SM) included in the PPU. Notably, the SMs may operate in parallel. Each SM executes write operations on a segment descriptor that includes the status, aggregate, and inclusive-prefix associated with the assigned segment. Further, each SM may execute read operations on segment descriptors associated with other segments. In operation, each SM may perform reduction operations to determine a segment-wide aggregate, may perform look-back operations across multiple preceding segments to determine an exclusive-prefix, and may perform a scan seeded with the exclusive prefix to generate output data. Advantageously, the PPU performs one read operation per input, thereby reducing the time required to execute the prefix scan relative to prior-art parallel implementations.

The invention relates to a global offset table protection method based on address randomness and segment isolation. The global offset table protection method comprises the steps that an ELF program is loaded, a memory space is randomly applied, ELF segment content is copied and given a new segment name, and a field PT_DYNAMIC is loaded; a segment descriptor is established for the memory space, an idle segment register is selected, and the segment descriptor is loaded into the segment register; the header of the program and the segment content in the memory space are modified, and codes in a .plt segment are modified; a dynamic linker is initialized, the segment content of the header of the program is modified, and an address where a .dynamic segment is located is hidden. According to the global offset table protection method, randomization processing is added, the address of a GOT is obtained by disassembling the codes, the address of the GOT cannot be worked out under the situation that the segment base address of the segment register is not known, the malicious code hijack attack carried out on the original fixed address of the GOT fails, and the malicious attack through the method of trying to read the fixed memory address and working out the address of the GOT fails.

The disclosure provides a memory controller configured to control a memory device. The memory controller may include a map buffer, a descriptor queue, and a descriptor controller. The map buffer may sequentially store map segments of a plurality of map segments stored in the memory device. The descriptor queue may store descriptors corresponding to the respective map segments, based on a plurality of addresses of the map buffer. The descriptor controller may search for a target descriptor among the stored descriptors based on a logical address received from a host, and reorder the stored descriptors while searching for the target descriptor.

A processor supports a first processing mode in which the address size is greater than 32 bits. The address size may be nominally indicated as 64 bits, although various embodiments of the processor may implement any address size which exceeds 32 bits, up to and including 64 bits, in the first processing mode. The first processing mode may be established by placing an enable indication in a control register into an enabled state and by setting a first operating mode indication and a second operating mode indication in a segment descriptor to predefined states. Other combinations of the first operating mode indication and the second operating mode indication may be used to provide compatibility modes for 32 bit and 16 bit processing compatible with the x86 processor architecture (with the enable indication remaining in the enabled state). To call code operating in the first processing mode from the 32 bit or 16 bit code, a call gate descriptor is defined which occupies two entries in a segment descriptor table. By occupying two entries, each of which may otherwise store a segment descriptor, the call gate descriptor may include enough space to store an address in excess of 32 bits. Thus, a calling code segment may reference a call gate descriptor, which may reference the target code semgent and may provide an address within the address space of the target code segment, even if the address exceeds the address size in the calling code segment.

The invention discloses an authority limit check system, device and method for accessing and saving operation under the sectionalized protection mechanism in the complicate instruction set computer sectionalized protection mechanism technique field. The method comprises the following steps: A, judging accessing and saving instruction type of receiving self accessing and saving instruction launching device by the accessing and saving operation authority limit check device, proceeding the procedure B if the accessing and saving instruction is the special accessing and saving instruction, proceeding the procedure C if not; B, checking if the field selector type, the segment descriptor word type and the field franchise of the special accessing and saving instruction is legal by the accessing and saving operation authority limit check device, ending the check if all are legal, proceeding the procedure D if any one isn' t legal; D, transferring the exceptional signal to the exceptional dealing device by the accessing and saving operation limit check device. The invention achieves the authority limit check for accessing and saving operation.