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SFI tables are data structures in memory, and all SFI tables share a common table header format. The operating system finds the system table by searching 16 byte boundaries between physical address 0x000E0000 and 0x000FFFFF. SFI has CPU, APIC, Memory Map, Idle, Frequency, M-Timer, M-RTC, OEMx, Wake Vector, I²C Device, and a SPI Device table.
A small and fast buffer memory between the CPU and the main memory. Reduces access time for frequently accessed items (instructions / operands). cache coherency The process of keeping data in multiple caches synchronised in a multiprocessor shared memory system, also required when DMA modifies the underlying memory. cache eviction
The protective MBR is stored at LBA 0, and the GPT header is in LBA 1, with a backup GPT header stored at the final LBA. The GPT header has a pointer to the partition table (Partition Entry Array), which is typically at LBA 2. Each entry on the partition table has a size of 128 bytes.
In addition to the binary application code, the executables may contain headers and tables with relocation and fixup information as well as various kinds of meta data. Among those formats listed, the ones in most common use are PE (on Microsoft Windows), ELF (on Linux and most other versions of Unix), Mach-O (on macOS and iOS) and MZ (on DOS).
Memory requirements are defined after considering demands of the application, operating system, supporting software and files, and other running processes. Optimal performance of other unrelated software running on a multi-tasking computer system is also considered when defining this requirement.
However, some modern SoCs (for example, Freescale i.MX6) have a vendor-provided boot loader with device tree on a separate chip from the operating system. [4] A proprietary configuration file format used for similar purposes, the FEX file format, [5] is a de facto standard among Allwinner SoCs. Devicetree is widely used for ARM-based Android ...
Over time, the PE format has grown with the Windows platform. Notable extensions include the .NET PE format for managed code, PE32+ for 64-bit address space support, and a specialized version for Windows CE. To determine whether a PE file is intended for 32-bit or 64-bit architectures, one can examine the Machine field in the IMAGE_FILE_HEADER. [6]
In Unix, == the loader is the handler for the system call execve(). [1] The Unix loader's tasks include: validation (permissions, memory requirements etc.); memory-mapping the executable object from the disk into main memory; copying the command-line arguments into virtual memory; initializing registers (e.g., the stack pointer);