1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Userland implementation of gettimeofday() for processes
6 * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org,
9 #include <asm/processor.h>
10 #include <asm/ppc_asm.h>
12 #include <asm/vdso_datapage.h>
13 #include <asm/asm-offsets.h>
14 #include <asm/unistd.h>
17 * The macro sets two stack frames, one for the caller and one for the callee
18 * because there are no requirement for the caller to set a stack frame when
19 * calling VDSO so it may have omitted to set one, especially on PPC64
22 .macro cvdso_call funct call_time=0
24 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
25 .cfi_adjust_cfa_offset PPC_MIN_STKFRM
27 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
28 .cfi_adjust_cfa_offset PPC_MIN_STKFRM
29 PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
30 .cfi_rel_offset lr, PPC_MIN_STKFRM + PPC_LR_STKOFF
32 PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1)
33 .cfi_rel_offset r2, PPC_MIN_STKFRM + STK_GOT
37 addi r5, r5, VDSO_DATA_OFFSET
39 addi r4, r5, VDSO_DATA_OFFSET
42 PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
44 PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1)
51 addi r1, r1, 2 * PPC_MIN_STKFRM
66 * Exact prototype of gettimeofday
68 * int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz);
71 V_FUNCTION_BEGIN(__kernel_gettimeofday)
72 cvdso_call __c_kernel_gettimeofday
73 V_FUNCTION_END(__kernel_gettimeofday)
76 * Exact prototype of clock_gettime()
78 * int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp);
81 V_FUNCTION_BEGIN(__kernel_clock_gettime)
82 cvdso_call __c_kernel_clock_gettime
83 V_FUNCTION_END(__kernel_clock_gettime)
86 * Exact prototype of clock_gettime64()
88 * int __kernel_clock_gettime64(clockid_t clock_id, struct __timespec64 *ts);
92 V_FUNCTION_BEGIN(__kernel_clock_gettime64)
93 cvdso_call __c_kernel_clock_gettime64
94 V_FUNCTION_END(__kernel_clock_gettime64)
98 * Exact prototype of clock_getres()
100 * int __kernel_clock_getres(clockid_t clock_id, struct timespec *res);
103 V_FUNCTION_BEGIN(__kernel_clock_getres)
104 cvdso_call __c_kernel_clock_getres
105 V_FUNCTION_END(__kernel_clock_getres)
109 * Exact prototype of time()
111 * time_t time(time *t);
114 V_FUNCTION_BEGIN(__kernel_time)
115 cvdso_call __c_kernel_time call_time=1
116 V_FUNCTION_END(__kernel_time)
118 /* Routines for restoring integer registers, called by the compiler. */
119 /* Called with r11 pointing to the stack header word of the caller of the */
120 /* function, just beyond the end of the integer restore area. */
121 #ifndef __powerpc64__
122 _GLOBAL(_restgpr_31_x)
123 _GLOBAL(_rest32gpr_31_x)