arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- arch/loongarch/kernel/traps.c | 7 +++- arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ samples/ftrace/ftrace-direct-modify.c | 8 ++--- samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- samples/ftrace/ftrace-direct-multi.c | 4 +-- samples/ftrace/ftrace-direct-too.c | 4 +-- samples/ftrace/ftrace-direct.c | 4 +-- 8 files changed, 56 insertions(+), 30 deletions(-)
The following test cases under the tools/testing/selftests/bpf/ directory have passed the test： ./test_progs -t module_attach ./test_progs -t module_fentry_shadow ./test_progs -t subprogs ./test_progs -t subprogs_extable ./test_progs -t tailcalls ./test_progs -t struct_ops -d struct_ops_multi_pages ./test_progs -t fexit_bpf2bpf ./test_progs -t fexit_stress ./test_progs -t module_fentry_shadow ./test_progs -t fentry_test/fentry ./test_progs -t fexit_test/fexit ./test_progs -t fentry_fexit ./test_progs -t modify_return ./test_progs -t fexit_sleep ./test_progs -t test_overhead ./test_progs -t trampoline_count Chenghao Duan (2): LoongArch: Modify the jump logic of the trampoline LoongArch: BPF: Enable BPF exception fixup for specific ADE subcode arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- arch/loongarch/kernel/traps.c | 7 +++- arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ samples/ftrace/ftrace-direct-modify.c | 8 ++--- samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- samples/ftrace/ftrace-direct-multi.c | 4 +-- samples/ftrace/ftrace-direct-too.c | 4 +-- samples/ftrace/ftrace-direct.c | 4 +-- 8 files changed, 56 insertions(+), 30 deletions(-) -- 2.25.1
One minor question, I wonder how you debug these issues ? On Tue, Dec 9, 2025 at 5:34 PM Chenghao Duan <duanchenghao@kylinos.cn> wrote: > > The following test cases under the tools/testing/selftests/bpf/ > directory have passed the test： > > ./test_progs -t module_attach > ./test_progs -t module_fentry_shadow > ./test_progs -t subprogs > ./test_progs -t subprogs_extable > ./test_progs -t tailcalls > ./test_progs -t struct_ops -d struct_ops_multi_pages > ./test_progs -t fexit_bpf2bpf > ./test_progs -t fexit_stress > ./test_progs -t module_fentry_shadow > ./test_progs -t fentry_test/fentry > ./test_progs -t fexit_test/fexit > ./test_progs -t fentry_fexit > ./test_progs -t modify_return > ./test_progs -t fexit_sleep > ./test_progs -t test_overhead > ./test_progs -t trampoline_count > > Chenghao Duan (2): > LoongArch: Modify the jump logic of the trampoline > LoongArch: BPF: Enable BPF exception fixup for specific ADE subcode > > arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- > arch/loongarch/kernel/traps.c | 7 +++- > arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ > samples/ftrace/ftrace-direct-modify.c | 8 ++--- > samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- > samples/ftrace/ftrace-direct-multi.c | 4 +-- > samples/ftrace/ftrace-direct-too.c | 4 +-- > samples/ftrace/ftrace-direct.c | 4 +-- > 8 files changed, 56 insertions(+), 30 deletions(-) > > -- > 2.25.1 >
On Wed, Dec 10, 2025 at 12:10:46PM +0800, Hengqi Chen wrote: > One minor question, I wonder how you debug these issues ? > There were initially two issues: 1. When monitoring the function addresses of kernel modules in the module_attach test case, kernel panic would occur. 2. Illegal address access in the module_attach and subprogs_extable test cases would lead to kernel panic. These two issues were debugged by combining different methods for different scenarios, including gdb, kgdb, embedding break instructions in assembly code, and printing stack and register data. Chenghao > On Tue, Dec 9, 2025 at 5:34 PM Chenghao Duan <duanchenghao@kylinos.cn> wrote: > > > > The following test cases under the tools/testing/selftests/bpf/ > > directory have passed the test： > > > > ./test_progs -t module_attach > > ./test_progs -t module_fentry_shadow > > ./test_progs -t subprogs > > ./test_progs -t subprogs_extable > > ./test_progs -t tailcalls > > ./test_progs -t struct_ops -d struct_ops_multi_pages > > ./test_progs -t fexit_bpf2bpf > > ./test_progs -t fexit_stress > > ./test_progs -t module_fentry_shadow > > ./test_progs -t fentry_test/fentry > > ./test_progs -t fexit_test/fexit > > ./test_progs -t fentry_fexit > > ./test_progs -t modify_return > > ./test_progs -t fexit_sleep > > ./test_progs -t test_overhead > > ./test_progs -t trampoline_count > > > > Chenghao Duan (2): > > LoongArch: Modify the jump logic of the trampoline > > LoongArch: BPF: Enable BPF exception fixup for specific ADE subcode > > > > arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- > > arch/loongarch/kernel/traps.c | 7 +++- > > arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ > > samples/ftrace/ftrace-direct-modify.c | 8 ++--- > > samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- > > samples/ftrace/ftrace-direct-multi.c | 4 +-- > > samples/ftrace/ftrace-direct-too.c | 4 +-- > > samples/ftrace/ftrace-direct.c | 4 +-- > > 8 files changed, 56 insertions(+), 30 deletions(-) > > > > -- > > 2.25.1 > >
On Tue, Dec 9, 2025 at 1:34 AM Chenghao Duan <duanchenghao@kylinos.cn> wrote: > > The following test cases under the tools/testing/selftests/bpf/ > directory have passed the test： > > ./test_progs -t module_attach > ./test_progs -t module_fentry_shadow > ./test_progs -t subprogs > ./test_progs -t subprogs_extable > ./test_progs -t tailcalls > ./test_progs -t struct_ops -d struct_ops_multi_pages > ./test_progs -t fexit_bpf2bpf > ./test_progs -t fexit_stress > ./test_progs -t module_fentry_shadow > ./test_progs -t fentry_test/fentry > ./test_progs -t fexit_test/fexit > ./test_progs -t fentry_fexit > ./test_progs -t modify_return > ./test_progs -t fexit_sleep > ./test_progs -t test_overhead > ./test_progs -t trampoline_count > Tested-by: Vincent Li <vincent.mc.li@gmail.com> I tested above and all passed OK, but I could not complete the full bpf selftests because test_progs core dumped, don't think it is related to your patch series. ./test_progs --deny=timer_lockup ...SNIP... test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 test_task_local_data_basic:PASS:pthread_create 0 nsec test_task_local_data_basic_thread:FAIL:tld_get_data unexpected error: -12 #444/1 task_local_data/task_local_data_basic:FAIL test_task_local_data_race:PASS:skel_open_and_load 0 nsec test_task_local_data_race:PASS:calloc tld_keys 0 nsec test_task_local_data_race:PASS:TLD_DEFINE_KEY 0 nsec test_task_local_data_race:FAIL:265 #444/2 task_local_data/task_local_data_race:FAIL #444 task_local_data:FAIL Caught signal #11! Stack trace: ./test_progs(crash_handler+0x28)[0x1205b74ac] linux-vdso.so.1(__vdso_rt_sigreturn+0x0)[0x7ffffffc1084] ./test_progs[0x1204eb064] ./test_progs(test_task_local_data+0x40)[0x1204eb3f8] ./test_progs[0x1205b7bec] ./test_progs(main+0x6c0)[0x1205b9c70] /lib64/libc.so.6(+0x2882c)[0x7ffff2f6082c] /lib64/libc.so.6(__libc_start_main+0xa8)[0x7ffff2f60918] ./test_progs(_start+0x48)[0x12013a0c0] Segmentation fault (core dumped) > Chenghao Duan (2): > LoongArch: Modify the jump logic of the trampoline > LoongArch: BPF: Enable BPF exception fixup for specific ADE subcode > > arch/loongarch/kernel/mcount_dyn.S | 14 +++++--- > arch/loongarch/kernel/traps.c | 7 +++- > arch/loongarch/net/bpf_jit.c | 37 +++++++++++++++------ > samples/ftrace/ftrace-direct-modify.c | 8 ++--- > samples/ftrace/ftrace-direct-multi-modify.c | 8 ++--- > samples/ftrace/ftrace-direct-multi.c | 4 +-- > samples/ftrace/ftrace-direct-too.c | 4 +-- > samples/ftrace/ftrace-direct.c | 4 +-- > 8 files changed, 56 insertions(+), 30 deletions(-) > > -- > 2.25.1 >
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