c22b0bcb1d
This patch enables "kprobe & kretprobe" to work with ftrace interface. It utilized software breakpoint as single-step mechanism. Some instructions which can't be single-step executed must be simulated in kernel execution slot, such as: branch, jal, auipc, la ... Some instructions should be rejected for probing and we use a blacklist to filter, such as: ecall, ebreak, ... We use ebreak & c.ebreak to replace origin instruction and the kprobe handler prepares an executable memory slot for out-of-line execution with a copy of the original instruction being probed. In execution slot we add ebreak behind original instruction to simulate a single-setp mechanism. The patch is based on packi's work [1] and csky's work [2]. - The kprobes_trampoline.S is all from packi's patch - The single-step mechanism is new designed for riscv without hw single-step trap - The simulation codes are from csky - Frankly, all codes refer to other archs' implementation [1] https://lore.kernel.org/linux-riscv/20181113195804.22825-1-me@packi.ch/ [2] https://lore.kernel.org/linux-csky/20200403044150.20562-9-guoren@kernel.org/ Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Co-developed-by: Patrick Stählin <me@packi.ch> Signed-off-by: Patrick Stählin <me@packi.ch> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Zong Li <zong.li@sifive.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Cc: Patrick Stählin <me@packi.ch> Cc: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
61 lines
1.4 KiB
Makefile
61 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
#
|
|
# Makefile for the RISC-V Linux kernel
|
|
#
|
|
|
|
ifdef CONFIG_FTRACE
|
|
CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
|
|
CFLAGS_REMOVE_patch.o = $(CC_FLAGS_FTRACE)
|
|
CFLAGS_REMOVE_sbi.o = $(CC_FLAGS_FTRACE)
|
|
endif
|
|
|
|
extra-y += head.o
|
|
extra-y += vmlinux.lds
|
|
|
|
obj-y += soc.o
|
|
obj-y += cpu.o
|
|
obj-y += cpufeature.o
|
|
obj-y += entry.o
|
|
obj-y += irq.o
|
|
obj-y += process.o
|
|
obj-y += ptrace.o
|
|
obj-y += reset.o
|
|
obj-y += setup.o
|
|
obj-y += signal.o
|
|
obj-y += syscall_table.o
|
|
obj-y += sys_riscv.o
|
|
obj-y += time.o
|
|
obj-y += traps.o
|
|
obj-y += riscv_ksyms.o
|
|
obj-y += stacktrace.o
|
|
obj-y += cacheinfo.o
|
|
obj-y += patch.o
|
|
obj-y += probes/
|
|
obj-$(CONFIG_MMU) += vdso.o vdso/
|
|
|
|
obj-$(CONFIG_RISCV_M_MODE) += traps_misaligned.o
|
|
obj-$(CONFIG_FPU) += fpu.o
|
|
obj-$(CONFIG_SMP) += smpboot.o
|
|
obj-$(CONFIG_SMP) += smp.o
|
|
obj-$(CONFIG_SMP) += cpu_ops.o
|
|
obj-$(CONFIG_SMP) += cpu_ops_spinwait.o
|
|
obj-$(CONFIG_MODULES) += module.o
|
|
obj-$(CONFIG_MODULE_SECTIONS) += module-sections.o
|
|
|
|
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o
|
|
obj-$(CONFIG_DYNAMIC_FTRACE) += mcount-dyn.o
|
|
|
|
obj-$(CONFIG_RISCV_BASE_PMU) += perf_event.o
|
|
obj-$(CONFIG_PERF_EVENTS) += perf_callchain.o
|
|
obj-$(CONFIG_HAVE_PERF_REGS) += perf_regs.o
|
|
obj-$(CONFIG_RISCV_SBI) += sbi.o
|
|
ifeq ($(CONFIG_RISCV_SBI), y)
|
|
obj-$(CONFIG_SMP) += cpu_ops_sbi.o
|
|
endif
|
|
obj-$(CONFIG_HOTPLUG_CPU) += cpu-hotplug.o
|
|
obj-$(CONFIG_KGDB) += kgdb.o
|
|
|
|
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
|
|
|
|
obj-$(CONFIG_EFI) += efi.o
|