Debugging with QEMU

This toolchain provides qemu-system-tricore and tricore-elf-gdb for running and debugging your code in a simulated environment.

QEMU support for Tricore architecture is incomplete. It provides only basic CPU instruction decode (no interrupts or multi-core) and no peripheral is available. Only core architecture from tc1.3 up to tc1.6.2 is supported

The code below uses ELF executable built from aurix-cmake-code-sample in debug mode (no optimizations and debug symbols enabled). It should work with any Tricore ELF file built with DWARF v3 debug symbols.

First step is to run QEMU providing the ELF executable, enabling gdb stub for remote debugging and enable startup freeze option to be able to connect before running the emulation.

$ qemu-system-tricore -machine KIT_AURIX_TC277_TRB -kernel ./out/debug/src/aurix_sample_tc33x.elf -s -S

Next we run tricore-elf-gdb, set the architecture version to 1.6.2 and connect to QEMU gdb stub:

$ tricore-elf-gdb ./out/debug/src/aurix_sample_tc33x.elf

GNU gdb (GDB) 14.0.50.20230607-git
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "--host=x86_64-pc-linux-gnu --target=tricore-elf".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
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    <http://www.gnu.org/software/gdb/documentation/>.

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Reading symbols from /mnt/c/git/aurix-cmake-code-sample/out/debug/src/aurix_sample_tc33x.elf...

(gdb) set architecture TriCore:V1_6_2
The target architecture is set to "TriCore:V1_6_2".

(gdb) target remote localhost:1234
Remote debugging using localhost:1234
Ifx_Ssw_jumpToFunction (fun=<optimized out>)
    at /home/nomore/Workspace/aurix-cmake-code-sample/third_party/infineon/Libraries/Infra/Ssw/TC33A/Tricore/Ifx_Ssw_CompilersGnuc.h:183
183         __asm__ volatile ("ji %0" ::"a" (fun));

Now you can start debugging your code through QEMU.