Searched hist:"8 b5ee2c6" (Results 1 – 4 of 4) sorted by relevance
/openbmc/linux/arch/loongarch/lib/ |
H A D | error-inject.c | 8b5ee2c6 Mon May 01 04:19:52 CDT 2023 Tiezhu Yang <yangtiezhu@loongson.cn> LoongArch: Add support for function error injection
Inspired by the commit 42d038c4fb00f ("arm64: Add support for function error injection") and the commit ee55ff803b383 ("riscv: Add support for function error injection"), this patch supports function error injection for LoongArch.
Mainly implement two functions: (1) regs_set_return_value() which is used to overwrite the return value, (2) override_function_with_return() which is used to override the probed function returning and jump to its caller.
Here is a simple test under CONFIG_FUNCTION_ERROR_INJECTION and CONFIG_FAIL_FUNCTION:
# echo sys_clone > /sys/kernel/debug/fail_function/inject # echo 100 > /sys/kernel/debug/fail_function/probability # dmesg bash: fork: Invalid argument # dmesg ... FAULT_INJECTION: forcing a failure. name fail_function, interval 1, probability 100, space 0, times 1 ... Call Trace: [<90000000002238f4>] show_stack+0x5c/0x180 [<90000000012e384c>] dump_stack_lvl+0x60/0x88 [<9000000000b1879c>] should_fail_ex+0x1b0/0x1f4 [<900000000032ead4>] fei_kprobe_handler+0x28/0x6c [<9000000000230970>] kprobe_breakpoint_handler+0xf0/0x118 [<90000000012e3e60>] do_bp+0x2c4/0x358 [<9000000002241924>] exception_handlers+0x1924/0x10000 [<900000000023b7d0>] sys_clone+0x0/0x4 [<90000000012e4744>] do_syscall+0x7c/0x94 [<9000000000221e44>] handle_syscall+0xc4/0x160
Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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H A D | Makefile | 8b5ee2c6 Mon May 01 04:19:52 CDT 2023 Tiezhu Yang <yangtiezhu@loongson.cn> LoongArch: Add support for function error injection
Inspired by the commit 42d038c4fb00f ("arm64: Add support for function error injection") and the commit ee55ff803b383 ("riscv: Add support for function error injection"), this patch supports function error injection for LoongArch.
Mainly implement two functions: (1) regs_set_return_value() which is used to overwrite the return value, (2) override_function_with_return() which is used to override the probed function returning and jump to its caller.
Here is a simple test under CONFIG_FUNCTION_ERROR_INJECTION and CONFIG_FAIL_FUNCTION:
# echo sys_clone > /sys/kernel/debug/fail_function/inject # echo 100 > /sys/kernel/debug/fail_function/probability # dmesg bash: fork: Invalid argument # dmesg ... FAULT_INJECTION: forcing a failure. name fail_function, interval 1, probability 100, space 0, times 1 ... Call Trace: [<90000000002238f4>] show_stack+0x5c/0x180 [<90000000012e384c>] dump_stack_lvl+0x60/0x88 [<9000000000b1879c>] should_fail_ex+0x1b0/0x1f4 [<900000000032ead4>] fei_kprobe_handler+0x28/0x6c [<9000000000230970>] kprobe_breakpoint_handler+0xf0/0x118 [<90000000012e3e60>] do_bp+0x2c4/0x358 [<9000000002241924>] exception_handlers+0x1924/0x10000 [<900000000023b7d0>] sys_clone+0x0/0x4 [<90000000012e4744>] do_syscall+0x7c/0x94 [<9000000000221e44>] handle_syscall+0xc4/0x160
Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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/openbmc/linux/arch/loongarch/include/asm/ |
H A D | ptrace.h | 8b5ee2c6 Mon May 01 04:19:52 CDT 2023 Tiezhu Yang <yangtiezhu@loongson.cn> LoongArch: Add support for function error injection
Inspired by the commit 42d038c4fb00f ("arm64: Add support for function error injection") and the commit ee55ff803b383 ("riscv: Add support for function error injection"), this patch supports function error injection for LoongArch.
Mainly implement two functions: (1) regs_set_return_value() which is used to overwrite the return value, (2) override_function_with_return() which is used to override the probed function returning and jump to its caller.
Here is a simple test under CONFIG_FUNCTION_ERROR_INJECTION and CONFIG_FAIL_FUNCTION:
# echo sys_clone > /sys/kernel/debug/fail_function/inject # echo 100 > /sys/kernel/debug/fail_function/probability # dmesg bash: fork: Invalid argument # dmesg ... FAULT_INJECTION: forcing a failure. name fail_function, interval 1, probability 100, space 0, times 1 ... Call Trace: [<90000000002238f4>] show_stack+0x5c/0x180 [<90000000012e384c>] dump_stack_lvl+0x60/0x88 [<9000000000b1879c>] should_fail_ex+0x1b0/0x1f4 [<900000000032ead4>] fei_kprobe_handler+0x28/0x6c [<9000000000230970>] kprobe_breakpoint_handler+0xf0/0x118 [<90000000012e3e60>] do_bp+0x2c4/0x358 [<9000000002241924>] exception_handlers+0x1924/0x10000 [<900000000023b7d0>] sys_clone+0x0/0x4 [<90000000012e4744>] do_syscall+0x7c/0x94 [<9000000000221e44>] handle_syscall+0xc4/0x160
Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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/openbmc/linux/arch/loongarch/ |
H A D | Kconfig | 8b5ee2c6 Mon May 01 04:19:52 CDT 2023 Tiezhu Yang <yangtiezhu@loongson.cn> LoongArch: Add support for function error injection
Inspired by the commit 42d038c4fb00f ("arm64: Add support for function error injection") and the commit ee55ff803b383 ("riscv: Add support for function error injection"), this patch supports function error injection for LoongArch.
Mainly implement two functions: (1) regs_set_return_value() which is used to overwrite the return value, (2) override_function_with_return() which is used to override the probed function returning and jump to its caller.
Here is a simple test under CONFIG_FUNCTION_ERROR_INJECTION and CONFIG_FAIL_FUNCTION:
# echo sys_clone > /sys/kernel/debug/fail_function/inject # echo 100 > /sys/kernel/debug/fail_function/probability # dmesg bash: fork: Invalid argument # dmesg ... FAULT_INJECTION: forcing a failure. name fail_function, interval 1, probability 100, space 0, times 1 ... Call Trace: [<90000000002238f4>] show_stack+0x5c/0x180 [<90000000012e384c>] dump_stack_lvl+0x60/0x88 [<9000000000b1879c>] should_fail_ex+0x1b0/0x1f4 [<900000000032ead4>] fei_kprobe_handler+0x28/0x6c [<9000000000230970>] kprobe_breakpoint_handler+0xf0/0x118 [<90000000012e3e60>] do_bp+0x2c4/0x358 [<9000000002241924>] exception_handlers+0x1924/0x10000 [<900000000023b7d0>] sys_clone+0x0/0x4 [<90000000012e4744>] do_syscall+0x7c/0x94 [<9000000000221e44>] handle_syscall+0xc4/0x160
Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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