Feb 10, 2013 · The ARM architecture was originally designed for Acorn personal computers (See Acorn Archimedes, circa 1987, and RiscPC), which were just as much keyboard-based personal computers as were x86 based IBM PC models. Only later ARM implementations were primarily targeted at the mobile and embedded market segment.

Dec 7, 2010 · The ARM7TDMI (ARMv4T architecture) knows both ARM and Thumb, as do almost all subsequent ARM systems except the Cortex-M. ARM and Thumb code can be mixed together within the same application, as long as the proper glue is inserted where conventions change; this is called thumb interworking and can be handled automatically by the C compiler.

Mar 26, 2014 · The ARM architectures are modular so families may implement only some features of the architecture and not others. Families may also have extensions not in the architecture and to make things even more interesting cores in the same family will usually differ in …

Jan 7, 2023 · The ARM architecture provides 3 privilege levels PL0 to PL2. While going through other documentation I found exception levels EL0 to EL3. What is the difference between privilege level & exception level. Or both are same.

From the ARM architecture reference: SP, the Stack Pointer. Register R13 is used as a pointer to the active stack. In Thumb code, most instructions cannot access SP. The only instructions that can access SP are those designed to use SP as a stack pointer. The use of SP for any purpose other than as a stack pointer is deprecated.

Oct 18, 2018 · What is the most reliable way to find out CPU architecture when compiling C or C++ code? As far as I can tell, different compilers have their own set of non-standard preprocessor definitions (_M_X8...

May 26, 2011 · Currently, there are two exception models in the ARM architecture (reset is considered a kind of exception): The classic model, used in pre-Cortex chip and current Cortex-A/R chips. In it, the memory at 0 contains several exception handlers:

To disassemble arm object file use arm-linux-gnueabi-objdump. In Ubuntu, "arm-linux-gnueabi-objdump" is the default disassembler for ARM binaries - no compilation is needed. To install it, just do: sudo apt-get install binutils-arm-linux-gnueabi. There are also other binaries inside this package that can further analyze the ARM binaries for you.

Jul 13, 2022 · ARM and RISC are used pretty much interchangably - Nope, RISC is a category that includes Instruction Set Architectures (ISAs) like ARM, PowerPC, MIPS, RISC-V, SPARC, 8-bit AVR, and others. ARM is one of the least RISCy, having a load-multiple instruction and complex addressing modes.

Aug 14, 2012 · This is a well tested way of knowing the host architecture: # Store in CMAKE_DEB_HOST_ARCH var the current build architecture execute_process(COMMAND dpkg-architecture -qDEB_HOST_ARCH OUTPUT_VARIABLE CMAKE_DEB_HOST_ARCH OUTPUT_STRIP_TRAILING_WHITESPACE ) And use that information later in …