From a2fe65bc365e0f252e13db372509a1b7ee2596bb Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx.manpages@gmail.com>
Date: Sun, 4 Apr 2021 13:58:37 +0200
Subject: [PATCH] getunwind.2: Use syscall(SYS_...); for system calls without a
 wrapper

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/getunwind.2 | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/man2/getunwind.2 b/man2/getunwind.2
index 45535dccf..2c44506c7 100644
--- a/man2/getunwind.2
+++ b/man2/getunwind.2
@@ -29,16 +29,14 @@
 getunwind \- copy the unwind data to caller's buffer
 .SH SYNOPSIS
 .nf
-.B #include <syscall.h>
 .B #include <linux/unwind.h>
+.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
+.B #inlcude <unistd.h>
 .PP
-.BI "long getunwind(void " *buf ", size_t " buf_size );
+.BI "long syscall(SYS_getunwind, void " *buf ", size_t " buf_size );
 .fi
-.PP
-.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
 .SH DESCRIPTION
-.I Note: this function is obsolete.
+.I Note: this system call is obsolete.
 .PP
 The
 IA-64-specific
@@ -102,9 +100,5 @@ and is available only on the IA-64 architecture.
 This system call has been deprecated.
 The modern way to obtain the kernel's unwind data is via the
 .BR vdso (7).
-.PP
-Glibc does not provide a wrapper for this system call;
-in the unlikely event that you want to call it, use
-.BR syscall (2).
 .SH SEE ALSO
 .BR getauxval (3)