LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

s390_guarded_storage.2: Use syscall(SYS_...); for system calls without a wrapper 

Also document why each header is needed.

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 2021-05-15 20:20:23 +02:00 committed by Michael Kerrisk
parent cc6f5bf20f
commit 56cfe81cfb
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
man2/s390_guarded_storage.2
View File

@ -27,13 +27,20 @@
s390_guarded_storage \- operations with z/Architecture guarded storage facility
.SH SYNOPSIS
.nf
.B #include <asm/guarded_storage.h>
.BR "#include <asm/guarded_storage.h> " "/* Definition of " GS_* " constants */"
.BR "#include <sys/syscall.h> " \
"/* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "int s390_guarded_storage(int " command ", struct gs_cb *" gs_cb ");"
.BI "int syscall(SYS_s390_guarded_storage, int " command ,
.BI " struct gs_cb *" gs_cb );
.fi
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
glibc provides no wrapper for
.BR s390_guarded_storage (2),
necessitating the use of
.BR syscall (2).
.SH DESCRIPTION
The
.BR s390_guarded_storage ()
@ -144,9 +151,6 @@ This Linux-specific system call is available only on the s390 architecture.
.PP
The guarded storage facility is available beginning with System z14.
.SH NOTES
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).
.PP
The description of the guarded storage facility along with related
instructions and Guarded Storage Control Block and
Guarded Storage Event Parameter List structure layouts