MOVQ	0(SP), SI
	MOVQ	SI, m_vdsoPC(BX)

	// set result registers; AX is already correct
	MOVQ	DI, BX
	ADDQ	DX, CX
	RET

fallback:
	MOVQ	$SYS_clock_gettime, AX
	SYSCALL

	MOVL	$1, DI // CLOCK_MONOTONIC
	LEAQ	0(SP), SI
	MOVQ	$SYS_clock_gettime, AX
	SYSCALL

// GetBootTime returns the time at which the machine was started, truncated to the nearest second
func GetBootTime() (time.Time, error) {
	currentTime := time.Now()
	ts := &unix.Timeval{}
	_, _, e1 := unix.Syscall(uintptr(unix.SYS_CLOCK_GETTIME), uintptr(unix.CLOCK_UPTIME), uintptr(unsafe.Pointer(ts)), 0)
	if e1 != 0 {
		return time.Time{}, fmt.Errorf("error getting system uptime")
	}

#define SYS_kill		37
#define SYS_sigaltstack		53
#define SYS_munmap		73
#define SYS_madvise		75
#define SYS_setitimer		83
#define SYS_fcntl		92
#define SYS_sysarch		165
#define SYS___sysctl		202
#define SYS_clock_gettime	232
#define SYS_nanosleep		240
#define SYS_issetugid		253
#define SYS_sched_yield		331
#define SYS_sigprocmask		340
#define SYS_kqueue		362
#define SYS_sigaction		416
#define SYS_sigreturn		417

	MOVW	$CLOCK_REALTIME, R0
	MOVD	$8(RSP), R1
	MOVD	$SYS_clock_gettime, R8
	SVC
	MOVD	8(RSP), R0	// sec
	MOVW	16(RSP), R1	// nsec
	MOVD	R0, sec+0(FP)
	MOVW	R1, nsec+8(FP)
	RET

// func fallback_nanotime() int64
TEXT runtime·fallback_nanotime(SB),NOSPLIT,$24-8
	MOVD	$CLOCK_MONOTONIC, R0
	MOVD	$8(RSP), R1
	MOVD	$SYS_clock_gettime, R8
	SVC
	MOVD	8(RSP), R0	// sec
	MOVW	16(RSP), R2	// nsec

	SYS_TIMER_CREATE           = 107
	SYS_TIMER_GETTIME          = 108
	SYS_TIMER_GETOVERRUN       = 109
	SYS_TIMER_SETTIME          = 110
	SYS_TIMER_DELETE           = 111
	SYS_CLOCK_SETTIME          = 112
	SYS_CLOCK_GETTIME          = 113
	SYS_CLOCK_GETRES           = 114
	SYS_CLOCK_NANOSLEEP        = 115
	SYS_SYSLOG                 = 116
	SYS_PTRACE                 = 117
	SYS_SCHED_SETPARAM         = 118

	MOV	$CLOCK_REALTIME, A0
	MOV	$8(X2), A1
	MOV	$SYS_clock_gettime, T0
	ECALL
	MOV	8(X2), T0	// sec
	MOVW	16(X2), T1	// nsec
	MOV	T0, sec+0(FP)
	MOVW	T1, nsec+8(FP)
	RET

// func fallback_nanotime() int64
TEXT runtime·fallback_nanotime(SB),NOSPLIT,$24-8
	MOV	$CLOCK_MONOTONIC, A0
	MOV	$8(X2), A1
	MOV	$SYS_clock_gettime, T0
	ECALL
	MOV	8(X2), T0	// sec
	MOV	16(X2), T1	// nsec

#define SYS_setitimer (SYS_BASE + 83)
#define SYS_fcntl (SYS_BASE + 92)
#define SYS___sysctl (SYS_BASE + 202)
#define SYS_nanosleep (SYS_BASE + 240)
#define SYS_issetugid (SYS_BASE + 253)
#define SYS_clock_gettime (SYS_BASE + 232)
#define SYS_sched_yield (SYS_BASE + 331)
#define SYS_sigprocmask (SYS_BASE + 340)
#define SYS_kqueue (SYS_BASE + 362)
#define SYS_sigaction (SYS_BASE + 416)
#define SYS_thr_exit (SYS_BASE + 431)

#define SYS_gettid		4222
#define SYS_futex		4238
#define SYS_sched_getaffinity	4240
#define SYS_exit_group		4246
#define SYS_timer_create	4257
#define SYS_timer_settime	4258
#define SYS_timer_delete	4261
#define SYS_clock_gettime	4263
#define SYS_tgkill		4266
#define SYS_pipe2		4328

TEXT runtime·exit(SB),NOSPLIT,$0-4
	MOVW	code+0(FP), R4
	MOVW	$SYS_exit_group, R2
	SYSCALL
	UNDEF
	RET

	SYS_TIMER_CREATE           = 254
	SYS_TIMER_SETTIME          = 255
	SYS_TIMER_GETTIME          = 256
	SYS_TIMER_GETOVERRUN       = 257
	SYS_TIMER_DELETE           = 258
	SYS_CLOCK_SETTIME          = 259
	SYS_CLOCK_GETTIME          = 260
	SYS_CLOCK_GETRES           = 261
	SYS_CLOCK_NANOSLEEP        = 262
	SYS_STATFS64               = 265
	SYS_FSTATFS64              = 266
	SYS_REMAP_FILE_PAGES       = 267

	SYS_TIMER_CREATE           = 107
	SYS_TIMER_GETTIME          = 108
	SYS_TIMER_GETOVERRUN       = 109
	SYS_TIMER_SETTIME          = 110
	SYS_TIMER_DELETE           = 111
	SYS_CLOCK_SETTIME          = 112
	SYS_CLOCK_GETTIME          = 113
	SYS_CLOCK_GETRES           = 114
	SYS_CLOCK_NANOSLEEP        = 115
	SYS_SYSLOG                 = 116
	SYS_PTRACE                 = 117
	SYS_SCHED_SETPARAM         = 118