This series of patches are for Crash-utility tool, it make crash tool support RISCV64 arch and the common commands(*, bt, p, rd, mod, log, set, struct, task, dis, help -r, help -m, and so on). To make the crash tool work normally for RISCV64 arch, we need a Linux kernel patch, which exports the kernel virtual memory layout, va_bits, phys_ram_base to vmcoreinfo, it can simplify the development of crash tool. The Linux kernel patch set: https://lore.kernel.org/linux-riscv/20220811074150.3020189-1-xianting.tian@xxxxxxxxxxxxxxxxx/ [ Patch 1 ~ 4 already merged to Linux for-next branch, targeted for 5.20; Patch 5, 6 already merged to Palmer's riscv-crash branch: https://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git/log/?h=riscv-crash ] This series of patches are tested on QEMU RISCV64 env and SoC platform of T-head Xuantie 910 RISCV64 CPU. ==================================== Some test examples list as below ==================================== ... ... KERNEL: vmlinux DUMPFILE: vmcore CPUS: 1 DATE: Fri Jul 15 10:24:25 CST 2022 UPTIME: 00:00:33 LOAD AVERAGE: 0.05, 0.01, 0.00 TASKS: 41 NODENAME: buildroot RELEASE: 5.18.9 VERSION: #30 SMP Fri Jul 15 09:47:03 CST 2022 MACHINE: riscv64 (unknown Mhz) MEMORY: 1 GB PANIC: "Kernel panic - not syncing: sysrq triggered crash" PID: 113 COMMAND: "sh" TASK: ff60000002269600 [THREAD_INFO: ff60000002269600] CPU: 0 STATE: TASK_RUNNING (PANIC) carsh> crash> p mem_map mem_map = $1 = (struct page *) 0xff6000003effbf00 crash> p /x *(struct page *) 0xff6000003effbf00 $5 = { flags = 0x1000, { { { lru = { next = 0xff6000003effbf08, prev = 0xff6000003effbf08 }, { __filler = 0xff6000003effbf08, mlock_count = 0x3effbf08 } }, mapping = 0x0, index = 0x0, private = 0x0 }, ... ... crash> mod MODULE NAME BASE SIZE OBJECT FILE ffffffff0113e740 nvme_core ffffffff01133000 98304 (not loaded) [CONFIG_KALLSYMS] ffffffff011542c0 nvme ffffffff0114c000 61440 (not loaded) [CONFIG_KALLSYMS] crash> rd ffffffff0113e740 8 ffffffff0113e740: 0000000000000000 ffffffff810874f8 .........t...... ffffffff0113e750: ffffffff011542c8 726f635f656d766e .B......nvme_cor ffffffff0113e760: 0000000000000065 0000000000000000 e............... ffffffff0113e770: 0000000000000000 0000000000000000 ................ crash> vtop ffffffff0113e740 VIRTUAL PHYSICAL ffffffff0113e740 8254d740 PGD: ffffffff810e9ff8 => 2ffff001 P4D: 0000000000000000 => 000000002fffec01 PUD: 00005605c2957470 => 0000000020949801 PMD: 00007fff7f1750c0 => 0000000020947401 PTE: 0 => 209534e7 PAGE: 000000008254d000 PTE PHYSICAL FLAGS 209534e7 8254d000 (PRESENT|READ|WRITE|GLOBAL|ACCESSED|DIRTY) PAGE PHYSICAL MAPPING INDEX CNT FLAGS ff6000003f0777d8 8254d000 0 0 1 0 crash> bt PID: 113 TASK: ff6000000226c200 CPU: 0 COMMAND: "sh" #0 [ff20000010333b90] riscv_crash_save_regs at ffffffff800078f8 #1 [ff20000010333cf0] panic at ffffffff806578c6 #2 [ff20000010333d50] sysrq_reset_seq_param_set at ffffffff8038c03c #3 [ff20000010333da0] __handle_sysrq at ffffffff8038c604 #4 [ff20000010333e00] write_sysrq_trigger at ffffffff8038cae4 #5 [ff20000010333e20] proc_reg_write at ffffffff801b7ee8 #6 [ff20000010333e40] vfs_write at ffffffff80152bb2 #7 [ff20000010333e80] ksys_write at ffffffff80152eda #8 [ff20000010333ed0] sys_write at ffffffff80152f52 ------- Changes V1 -> V2: 1, Do the below fixes based on HAGIO KAZUHITO's comments: Fix build warnings, Use MACRO for Linux version, Add description of x86_64 binary for riscv64 in README, Fix build error for the "sticky" target for build on x86_64, Fix the mixed indent. 2, Add 'help -m/M' support patch to this patch set. 3, Support native compiling approach, which means the host OS distro is also a riscv64 (lp64d) Linux, based on Yixun Lan's comments. 4, Use __riscv and __riscv_xlen instead of __riscv64__ based on Yixun Lan's comments. Changes V2 -> V3: 1, Fix coding style, avoid including the header twice, move free() to right place, introduce VM_FLAGS and so on based on Li Jiang's comments. 2, Adjust the implementation of riscv64_verify_symbol(refer to the logic of x86_64_verify_symbol) as KSYMS_START isn't set when verify symbol in some case. Xianting Tian (9): Add RISCV64 framework code support RISCV64: Make crash tool enter command line and support some commands RISCV64: Add 'dis' command support RISCV64: Add 'irq' command support RISCV64: Add 'bt' command support RISCV64: Add 'help -r' command support RISCV64: Add 'help -m/M' command support RISCV64: Add 'mach' command support RISCV64: Add the implementation of symbol verify Makefile | 7 +- README | 4 +- configure.c | 43 +- defs.h | 252 +++++++- diskdump.c | 21 +- help.c | 2 +- lkcd_vmdump_v1.h | 8 +- lkcd_vmdump_v2_v3.h | 8 +- netdump.c | 22 +- ramdump.c | 2 + riscv64.c | 1491 +++++++++++++++++++++++++++++++++++++++++++ symbols.c | 10 + 12 files changed, 1848 insertions(+), 22 deletions(-) create mode 100644 riscv64.c -- 2.17.1 -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
