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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>
This commit is contained in:
Alejandro Colomar 2021-04-04 13:58:37 +02:00 committed by Michael Kerrisk
parent 73f2d2ba11
commit a2fe65bc36
1 changed files with 4 additions and 10 deletions
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14
man2/getunwind.2
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@ -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.I Note: this function is obsolete.
.I Note: this system call is obsolete.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)