| // Copyright 2019 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package runtime |
| |
| import ( |
| "internal/cpu" |
| "unsafe" |
| ) |
| |
| func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) { |
| // Machine dependent mcontext initialisation for LWP. |
| mc.__gregs[_REG_ELR] = uint64(funcPC(lwp_tramp)) |
| mc.__gregs[_REG_X31] = uint64(uintptr(stk)) |
| mc.__gregs[_REG_X0] = uint64(uintptr(unsafe.Pointer(mp))) |
| mc.__gregs[_REG_X1] = uint64(uintptr(unsafe.Pointer(mp.g0))) |
| mc.__gregs[_REG_X2] = uint64(fn) |
| } |
| |
| //go:nosplit |
| func cputicks() int64 { |
| // Currently cputicks() is used in blocking profiler and to seed runtime·fastrand(). |
| // runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler. |
| return nanotime() |
| } |
| |
| func archauxv(auxv []uintptr) { |
| // NetBSD does not supply AT_HWCAP, however we still need to initialise cpu.HWCaps. |
| // For now specify the bare minimum until we add some form of capabilities |
| // detection. See issue https://golang.org/issue/30824#issuecomment-494901591 |
| cpu.HWCap = 1<<1 | 1<<0 // ASIMD, FP |
| } |
