Changes in Makefile

33081722 - trace: riscv: Remove deprecated kprobe on ftrace support

Thu, 13 Jun 2024 11:13:47 +0000

trace: riscv: Remove deprecated kprobe on ftrace supportSince commit 7caa9765465f60 ("ftrace: riscv: move from REGS to ARGS"),kprobe on ftrace is not supported by riscv, because riscv's support forFTRACE_WITH_REGS has been replaced with support for FTRACE_WITH_ARGS, andKPROBES_ON_FTRACE will be supplanted by FPROBES. So remove the deprecatedkprobe on ftrace support, which is misunderstood.Signed-off-by: Jinjie Ruan Acked-by: Masami Hiramatsu (Google) Link: https://lore.kernel.org/r/20240613111347.1745379-1-ruanjinjie@huawei.comSigned-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile

571a2a50 - rethook, fprobe: do not trace rethook related functions

Wed, 17 May 2023 03:45:09 +0000

rethook, fprobe: do not trace rethook related functionsThese functions are already marked as NOKPROBE to prevent recursion andwe have the same reason to blacklist them if rethook is used with fprobe,since they are beyond the recursion-free region ftrace can guard.Link: https://lore.kernel.org/all/20230517034510.15639-5-zegao@tencent.com/Fixes: f3a112c0c40d ("x86,rethook,kprobes: Replace kretprobe with rethook on x86")Signed-off-by: Ze Gao Reviewed-by: Steven Rostedt (Google) Acked-by: Masami Hiramatsu (Google) Cc: stable@vger.kernel.orgSigned-off-by: Masami Hiramatsu (Google) List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile

b57c2f12 - riscv: add riscv rethook implementation

Tue, 25 Oct 2022 15:18:32 +0000

riscv: add riscv rethook implementationImplement the kretprobes on riscv arch by using rethook machenismwhich abstracts general kretprobe info into a struct rethook_nodeto be embedded in the struct kretprobe_instance.Acked-by: Masami Hiramatsu (Google) Signed-off-by: Binglei Wang Signed-off-by: Conor Dooley Link: https://lore.kernel.org/r/20221025151831.1097417-1-conor@kernel.orgSigned-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile

74784081 - riscv: Add uprobes supported

Thu, 17 Dec 2020 16:01:44 +0000

riscv: Add uprobes supportedThis patch adds support for uprobes on riscv architecture.Just like kprobe, it support single-step and simulate instructions.Signed-off-by: Guo Ren Reviewed-by: Pekka Enberg Cc: Oleg Nesterov Cc: Masami Hiramatsu Cc: Palmer Dabbelt Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile

829adda5 - riscv: Add KPROBES_ON_FTRACE supported

Thu, 17 Dec 2020 16:01:43 +0000

riscv: Add KPROBES_ON_FTRACE supportedThis patch adds support for kprobes on ftrace call sites to avoidsmuch of the overhead with regular kprobes. Try it with simplesteps: echo 'p:myprobe sys_clone a0=%a0 a1=%a1 stack_val=+4($stack)' > /sys/kernel/debug/tracing/kprobe_events echo 1 > /sys/kernel/debug/tracing/events/kprobes/enable cat /sys/kernel/debug/tracing/trace tracer: nop entries-in-buffer/entries-written: 1/1 #P:1 _-----=> irqs-off / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / delay TASK-PID CPU# |||| TIMESTAMP FUNCTION | | | |||| | | sh-92 [000] .... 369.899962: myprobe: (sys_clone+0x0/0x28) a0=0x1200011 a1=0x0 stack_val=0x201c20ffffffe0 cat /sys/kernel/debug/kprobes/listffffffe00020b584 k sys_clone+0x0 [FTRACE] ^^^^^^Signed-off-by: Guo Ren Reviewed-by: Masami Hiramatsu Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile

c22b0bcb - riscv: Add kprobes supported

Thu, 17 Dec 2020 16:01:42 +0000

riscv: Add kprobes supportedThis patch enables "kprobe & kretprobe" to work with ftraceinterface. It utilized software breakpoint as single-stepmechanism.Some instructions which can't be single-step executed must besimulated in kernel execution slot, such as: branch, jal, auipc,la ...Some instructions should be rejected for probing and we use ablacklist to filter, such as: ecall, ebreak, ...We use ebreak & c.ebreak to replace origin instruction and thekprobe handler prepares an executable memory slot for out-of-lineexecution with a copy of the original instruction being probed.In execution slot we add ebreak behind original instruction tosimulate 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 Co-developed-by: Patrick Stählin Signed-off-by: Patrick Stählin Acked-by: Masami Hiramatsu Tested-by: Zong Li Reviewed-by: Pekka Enberg Cc: Patrick Stählin Cc: Palmer Dabbelt Cc: Björn Töpel Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/arch/riscv/kernel/probes/Makefile