arm

问题 Can someone explain this code snippet to me? Also please give me some link/URL where i can know more about this? This code is used as a wrapper to override the "extern int errno" in our library. Can someone explain me this function, and tell why is wrapper needed in some syscalls? Which are also called WeakSYSCALLS? #define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1) #define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2) #define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3) #define LOADREGS_5(a1, a2, a3, a4, a5) \ register int

问题 My goal is to emulate the ARM A9 processor as found on the Zynq-7000, running baremetal software. I have tried 2 different approaches to this and run into road blocks on both. Any suggestions on how to proceed would be appreciated. Current answers on StackOverflow: How to make bare metal ARM programs and run them on QEMU? which links to Linux Kernel Module Cheat (LKMC, using v3.0) built using ./build --arch arm qemu-baremetal The examples on the site of using the ARM virtual machine ( -virt

问题 There are some questions like mine. why I need put *.so files in both armeabi-v7a and armeabi folders? Why armeabi-v7a conflicts with armeabi of another module? Why use armeabi-v7a code over armeabi code? But I am not clear yet. I have many .so files for armeabi and armeabi-v7a. // binaries armeabi/libarmeabi-v7a-module1.so armeabi/libarmeabi-v7a-module2.so // Application.mk file APP_ABI := armeabi APP_PLATFORM := android-19 APP_STL := gnustl_shared // Android.mk file include $(CLEAR_VARS)

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 17 days ago . Improve this question I'd like to run a Debian OS .iso image for ARM processors using QEMU in a host running Ubuntu (over an x86 architecture). I executed the following line in a terminal: aaron@aaron-HP-ZBook-14:~/Descargas$ qemu-system-arm -machine sabrelite -cdrom debian-10.7.0

问题 I successfully built a test application for an Intel Cyclone V SoC with the Intel Embedded Development Suite for FPGA SoCs. This application links against some target system specific libraries. As the GCC shipped with the EDS is quite outdated and I need newer C++ features, I wanted to compile the whole thing with a current version of arm-linux-gnueabihf-g++ which I downloaded here from the ARM website. Compiling the same project that builds fine with the original toolchain with the recent

问题 I am quite new to cross compiling. After downloading the arm-linux-gnueabihf tool from arm. I tried to use the binary called arm-linux-gnueabihf-g++ and arm-linux-gnueabihf-gcc to compile my code. My command looks something like: ~/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc -Isrc -I/usr/include -std=c++11 -Wall -Wno-unknown-pragmas -O0 -g3 -D__DEBUG_BUILD__ -DDEVELOPMENT -MMD -c -o "Debug/src/BatteryStatus.o" "src/BatteryStatus.cpp" I immediately run into this

问题 I have one application was compiled with Greenhills compiler before, I am trying to use arm-Gcc compiler to compile it, when I try to link the objects with link script (.LD), I got syntax error. I know the link command are different in Greenhills and arm-Gcc, I am trying to find the equivalent ones in Gcc but failed now. I list my Greenhills LD file below and what I tired to change for GCC. Any comments and suggestions are appreciated. Thanks GHS ld file : MEMORY { INIT_SRAM : ORIGIN =

问题 I want to build an ARM application(just a simple main function) on Windows host using GCC Linaro toolchains version 7.4.1. Compilation is OK, my .o files are created but on linking step I get the following errors(tested on different computers and result is same) Errors start from locale.o file... But that /home/tcwg-builds/.. directory is not related to my computer paths... Building target: arm_cpp Invoking: Cross G++ Linker arm-eabi-g++ -o "arm_cpp" ./src/arm_cpp.o c:/users/yunus/desktop

问题 I'm trying to add the values in two registers, and modulo them by 8. So, in C code, it would be like this a = a + b; c = a % 8; how to do this above operation in ARM assembly. 回答1: Not all ARM processors have a direct instruction for division or modulo, so in most cases, a call to the modulo operation would end up as a function call to e.g. ___modsi3 . In this particular case, when doing modulo for 8, if the values can be assumed to be nonnegative, you can do the % 8 part as & 7 . In that

问题 I want to run arm's linux system in gem5's fs mode,I download related files from this address: http://www.gem5.org/documentation/general_docs/fullsystem/guest_binaries I was able to configure the correct file path, but finally got this output in the terminal2: [ 0.661620] No filesystem could mount root, tried: [ 0.661621] ext3 [ 0.661650] ext4`enter code here` [ 0.661663] ext2 [ 0.661676] vfat [ 0.661690] fuseblk [ 0.661703] [ 0.661728] Kernel panic - not syncing: VFS: Unable to mount root fs