diff options
Diffstat (limited to 'meta/recipes-kernel/lttng/lttng-modules/0007-fix-kprobes-Use-rethook-for-kretprobe-if-possible-v5.patch')
| -rw-r--r-- | meta/recipes-kernel/lttng/lttng-modules/0007-fix-kprobes-Use-rethook-for-kretprobe-if-possible-v5.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0007-fix-kprobes-Use-rethook-for-kretprobe-if-possible-v5.patch b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-kprobes-Use-rethook-for-kretprobe-if-possible-v5.patch new file mode 100644 index 0000000000..effd37ffe1 --- /dev/null +++ b/meta/recipes-kernel/lttng/lttng-modules/0007-fix-kprobes-Use-rethook-for-kretprobe-if-possible-v5.patch @@ -0,0 +1,72 @@ +From 3c46ddc134621dba65030263aa321dd6bdae3ba3 Mon Sep 17 00:00:00 2001 +From: Michael Jeanson <mjeanson@efficios.com> +Date: Mon, 4 Apr 2022 15:02:10 -0400 +Subject: [PATCH 07/10] fix: kprobes: Use rethook for kretprobe if possible + (v5.18) + +See upstream commit : + + commit 73f9b911faa74ac5107879de05c9489c419f41bb + Author: Masami Hiramatsu <mhiramat@kernel.org> + Date: Sat Mar 26 11:27:05 2022 +0900 + + kprobes: Use rethook for kretprobe if possible + + Use rethook for kretprobe function return hooking if the arch sets + CONFIG_HAVE_RETHOOK=y. In this case, CONFIG_KRETPROBE_ON_RETHOOK is + set to 'y' automatically, and the kretprobe internal data fields + switches to use rethook. If not, it continues to use kretprobe + specific function return hooks. + +Upstream-Status: Backport + +Change-Id: I2b7670dc04e4769c1e3c372582ad2f555f6d7a66 +Signed-off-by: Michael Jeanson <mjeanson@efficios.com> +Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> +--- + include/wrapper/kprobes.h | 17 +++++++++++++++++ + src/probes/lttng-kretprobes.c | 2 +- + 2 files changed, 18 insertions(+), 1 deletion(-) + +diff --git a/include/wrapper/kprobes.h b/include/wrapper/kprobes.h +index b546d615..51d32b7c 100644 +--- a/include/wrapper/kprobes.h ++++ b/include/wrapper/kprobes.h +@@ -29,4 +29,21 @@ struct kretprobe *lttng_get_kretprobe(struct kretprobe_instance *ri) + + #endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0) */ + ++ ++#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,18,0)) ++static inline ++unsigned long lttng_get_kretprobe_retaddr(struct kretprobe_instance *ri) ++{ ++ return get_kretprobe_retaddr(ri); ++} ++ ++#else ++ ++static inline ++unsigned long lttng_get_kretprobe_retaddr(struct kretprobe_instance *ri) ++{ ++ return (unsigned long) ri->ret_addr; ++} ++#endif ++ + #endif /* _LTTNG_WRAPPER_KPROBES_H */ +diff --git a/src/probes/lttng-kretprobes.c b/src/probes/lttng-kretprobes.c +index 5cb2e953..565df739 100644 +--- a/src/probes/lttng-kretprobes.c ++++ b/src/probes/lttng-kretprobes.c +@@ -81,7 +81,7 @@ int _lttng_kretprobes_handler(struct kretprobe_instance *krpi, + int ret; + + payload.ip = (unsigned long) lttng_get_kretprobe(krpi)->kp.addr; +- payload.parent_ip = (unsigned long) krpi->ret_addr; ++ payload.parent_ip = lttng_get_kretprobe_retaddr(krpi); + + lib_ring_buffer_ctx_init(&ctx, event_recorder, sizeof(payload), + lttng_alignof(payload), <tng_probe_ctx); +-- +2.19.1 + |