[Crash-utility] Re: [PATCH 0/5] LoongArch64: Fix register notes and exception unwinding

Hi Ming, I'm OK with this patchset. so ack.

Thanks, Tao Liu On Thu, Jun 4, 2026 at 11:54 PM Ming Wang <wangming01(a)loongson.cn&gt; wrote: > > This series fixes several LoongArch64 crash utility issues seen when > reading CPU register state and unwinding active tasks from vmcore files. > > The first two patches fix register extraction from NT_PRSTATUS/crash > notes and initialize the pt_regs.regs offset used for active task register > fallback. The remaining patches improve backtracing across LoongArch > exception frames, fix the stack top boundary check for pt_regs, and avoid > a null eframe_search callback when bt -e is requested. > > The NT_PRSTATUS register layout follows the LoongArch kernel > elf_gregset_t/struct pt_regs order: 32 GPRs followed by orig_a0, csr_era, > csr_badvaddr, csr_crmd, csr_prmd, csr_euen, csr_ecfg and csr_estat. > The exception unwinding changes only treat entry symbols that leave a > saved pt_regs at sp as exception frames. > > Tested: > - LoongArch 3C6000 platform with vmcore > - make -C crash -j$(nproc) on x86_64 host > - gcc -DLOONGARCH64 -c -o /tmp/loongarch64-final.o loongarch64.c > - gcc -c -o /tmp/loongarch64-final-generic.o loongarch64.c > - git diff --check origin/master..HEAD > > > Ming Wang (5): > LoongArch64: Fix CPU registers reading from dump notes > LoongArch64: Fix pt_regs initialization for active tasks > LoongArch64: Support backtracing across exception boundaries > LoongArch64: Fix stack frame loop bounds for exception frames > LoongArch64: Add dummy eframe_search to avoid bt -e segfault > > loongarch64.c | 78 +++++++++++++++++++++++++++++++++++++++------------ > 1 file changed, 60 insertions(+), 18 deletions(-) > > -- > 2.43.0 >