[PATCHv5 8/8] man2: Add uretprobe syscall page
From: Jiri Olsa <jolsa@kernel.org>
Date: 2024-05-07 10:55:10
Also in:
bpf, linux-man, linux-trace-kernel, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Adding man page for new uretprobe syscall. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- man2/uretprobe.2 | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 man2/uretprobe.2
diff --git a/man2/uretprobe.2 b/man2/uretprobe.2
new file mode 100644
index 000000000000..690fe3b1a44f
--- /dev/null
+++ b/man2/uretprobe.2@@ -0,0 +1,50 @@ +.\" Copyright (C) 2024, Jiri Olsa <jolsa@kernel.org> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH uretprobe 2 (date) "Linux man-pages (unreleased)" +.SH NAME +uretprobe \- execute pending return uprobes +.SH SYNOPSIS +.nf +.B int uretprobe(void) +.fi +.SH DESCRIPTION +The +.BR uretprobe () +syscall is an alternative to breakpoint instructions for +triggering return uprobe consumers. +.P +Calls to +.BR uretprobe () +suscall are only made from the user-space trampoline provided by the kernel. +Calls from any other place result in a +.BR SIGILL . + +.SH RETURN VALUE +The +.BR uretprobe () +syscall return value is architecture-specific. + +.SH VERSIONS +This syscall is not specified in POSIX, +and details of its behavior vary across systems. +.SH STANDARDS +None. +.SH HISTORY +TBD +.SH NOTES +The +.BR uretprobe () +syscall was initially introduced for the x86_64 architecture where it was shown +to be faster than breakpoint traps. It might be extended to other architectures. +.P +The +.BR uretprobe () +syscall exists only to allow the invocation of return uprobe consumers. +It should +.B never +be called directly. +Details of the arguments (if any) passed to +.BR uretprobe () +and the return value are architecture-specific.
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2.44.0