1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Userland implementation of clock_getres() for 64 bits processes in a
 4 * s390 kernel for use in the vDSO
 5 *
 6 *  Copyright IBM Corp. 2008
 7 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 
 
 
 
 8 */
 9#include <asm/vdso.h>
10#include <asm/asm-offsets.h>
11#include <asm/unistd.h>
12#include <asm/dwarf.h>
13
14	.text
15	.align 4
16	.globl __kernel_clock_getres
17	.type  __kernel_clock_getres,@function
18__kernel_clock_getres:
19	CFI_STARTPROC
20	larl	%r1,4f
21	cghi	%r2,__CLOCK_REALTIME_COARSE
22	je	0f
23	cghi	%r2,__CLOCK_MONOTONIC_COARSE
24	je	0f
25	larl	%r1,3f
26	cghi	%r2,__CLOCK_REALTIME
27	je	0f
28	cghi	%r2,__CLOCK_MONOTONIC
29	je	0f
30	cghi	%r2,__CLOCK_THREAD_CPUTIME_ID
31	je	0f
32	cghi	%r2,-2		/* Per-thread CPUCLOCK with PID=0, VIRT=1 */
33	jne	2f
34	larl	%r5,_vdso_data
35	icm	%r0,15,__LC_ECTG_OK(%r5)
36	jz	2f
370:	ltgr	%r3,%r3
38	jz	1f				/* res == NULL */
 
39	lg	%r0,0(%r1)
40	xc	0(8,%r3),0(%r3)			/* set tp->tv_sec to zero */
41	stg	%r0,8(%r3)			/* store tp->tv_usec */
421:	lghi	%r2,0
43	br	%r14
442:	lghi	%r1,__NR_clock_getres		/* fallback to svc */
45	svc	0
46	br	%r14
47	CFI_ENDPROC
483:	.quad	__CLOCK_REALTIME_RES
494:	.quad	__CLOCK_COARSE_RES
50	.size	__kernel_clock_getres,.-__kernel_clock_getres

 
 1/*
 2 * Userland implementation of clock_getres() for 64 bits processes in a
 3 * s390 kernel for use in the vDSO
 4 *
 5 *  Copyright IBM Corp. 2008
 6 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License (version 2 only)
10 * as published by the Free Software Foundation.
11 */
12#include <asm/vdso.h>
13#include <asm/asm-offsets.h>
14#include <asm/unistd.h>
 
15
16	.text
17	.align 4
18	.globl __kernel_clock_getres
19	.type  __kernel_clock_getres,@function
20__kernel_clock_getres:
21	.cfi_startproc
 
 
 
 
 
 
22	cghi	%r2,__CLOCK_REALTIME
23	je	0f
24	cghi	%r2,__CLOCK_MONOTONIC
25	je	0f
26	cghi	%r2,__CLOCK_THREAD_CPUTIME_ID
27	je	0f
28	cghi	%r2,-2		/* Per-thread CPUCLOCK with PID=0, VIRT=1 */
29	jne	2f
30	larl	%r5,_vdso_data
31	icm	%r0,15,__LC_ECTG_OK(%r5)
32	jz	2f
330:	ltgr	%r3,%r3
34	jz	1f				/* res == NULL */
35	larl	%r1,3f
36	lg	%r0,0(%r1)
37	xc	0(8,%r3),0(%r3)			/* set tp->tv_sec to zero */
38	stg	%r0,8(%r3)			/* store tp->tv_usec */
391:	lghi	%r2,0
40	br	%r14
412:	lghi	%r1,__NR_clock_getres		/* fallback to svc */
42	svc	0
43	br	%r14
 
443:	.quad	__CLOCK_REALTIME_RES
45	.cfi_endproc
46	.size	__kernel_clock_getres,.-__kernel_clock_getres