[Crash-utility] [PATCH 0/3] RISCV64: enhance bt command

hi, This series enhances the bt command for RISCV64 by making bt aware of - possible kernel and user exception frames (bt -e) - per-cpu IRQ stacks (bt for vmcore crashed in irq stack, bt -E) - per-cpu overflow stacks (bt for vmcore caused by kernel stack overflow) This series is based on the "RISCV64: Fix 'bt' output when no ra on the stack top" patch sent a few days ago. You can get them all from my Github repo: https://github.com/sugarfillet/crash/commits/rv64-bt-enhance/ The detailed test report can be found in each patch's commit-msg and all these tests passed on the RV64 Qemu-virt and with RISC-V Linux v6.6. Here is the abstract of these three patches: Patch1 : [Crash-utility] RISCV64: Add support for 'bt -e' option With this patch we can search the stack for possible kernel and user mode exception frames via 'bt -e' command. Patch2 : [Crash-utility] RISCV64: Add per-cpu IRQ stacks support This patch introduces per-cpu IRQ stacks for RISCV64 to let "bt" do backtrace on it and 'bt -E' search eframes on it, and the 'help -m' command displays the addresses of each per-cpu IRQ stack. Patch3: [Crash-utility] RISCV64: Add per-cpu overflow stacks support The patch introduces per-cpu overflow stacks for RISCV64 to let "bt" do backtrace on it and the 'help -m' command dispalys the addresss of each per-cpu overflow stack. Song Shuai (3): [Crash-utility] RISCV64: Add support for 'bt -e' option [Crash-utility] RISCV64: Add per-cpu IRQ stacks support [Crash-utility] RISCV64: Add per-cpu overflow stacks support defs.h | 30 +++- help.c | 2 +- riscv64.c | 492 +++++++++++++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 494 insertions(+), 30 deletions(-) -- 2.20.1