/qemu-monitor

Primary LanguageC

QEMU-Debug-Tool

User Guide

Environment Setup

  1. Build qemu-system-aarch64, kernel and rootfs
    • copy qemu-patch/qemu.patch to qemu directory
    • cd to qemu directory
    • $ checkout 2ee55b8351910e5dd898f52415064a4c5479baba
    • $ patch -p1 < ./qemu.patch
    • $ ./configure --target-list=aarch64-softmmu
    • $ make -j8
  2. Download pre-built gdb(aarch64) from linaro release website
  3. make
  4. make install PREFIX=INSTALL_PATH

Execution

  1. $ qemu-monitor
  2. $ qemu-system-aarch64 -machine virt -cpu cortex-a57 -machine type=virt -nographic -smp 1 -m 512 -kernel KERNEL_IMAGE_PATH --append "console=ttyAMA0" -gdb tcp::1234 -S
  3. $ aarch64-linux-gnu-gdb(file vmlinux, remote target :1234)
  4. Enter command in debug tool and then debug with gdb

Command Usage

  • display $register_name[end_bit:start_bit] - auto display registers along with gdb
  • undisplay display_number - disable auto display register which specified by display_number
  • print /x $register_name[end_bit:start_bit] - print value of register in format x(d, u, o)
  • store filename - store current display registers to filename, which could be used in load command
  • load filename - load a command script, like gdb -x
  • refresh - refresh display window(tui mode only)
  • help - show help guide