Hi, Here is the 13th version of rethook x86 port. This is developed for a part of fprobe series [1] for hooking function return. But since I forgot to send it to arch maintainers, that caused conflict with IBT and SLS mitigation series. Now I picked the x86 rethook part and send it to x86 maintainers to be reviewed. [1] https://lore.kernel.org/all/164735281449.1084943.12438881786173547153.stgit@devnote2/T/#u Note that this patch is still for the bpf-next since the rethook itself is on the bpf-next tree. But since this also uses the ANNOTATE_NOENDBR macro which has been introduced by IBT/ENDBR patch, to build this series you need to merge the tip/master branch with the bpf-next. (hopefully, it is rebased soon) The fprobe itself is for providing the function entry/exit probe with multiple probe point. The rethook is a sub-feature to hook the function return as same as kretprobe does. Eventually, I would like to replace the kretprobe's trampoline with this rethook. Thank you, --- Masami Hiramatsu (1): rethook: x86: Add rethook x86 implementation arch/x86/Kconfig | 1 arch/x86/include/asm/unwind.h | 8 ++- arch/x86/kernel/Makefile | 1 arch/x86/kernel/kprobes/common.h | 1 arch/x86/kernel/rethook.c | 121 ++++++++++++++++++++++++++++++++++++++ 5 files changed, 131 insertions(+), 1 deletion(-) create mode 100644 arch/x86/kernel/rethook.c -- Masami Hiramatsu (Linaro) <mhiramat@xxxxxxxxxx>
