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author | gVisor bot <gvisor-bot@google.com> | 2019-09-19 19:06:06 +0000 |
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committer | gVisor bot <gvisor-bot@google.com> | 2019-09-19 19:06:06 +0000 |
commit | 95c44730a73d85cf4f658eacee0a52697c42d7be (patch) | |
tree | 3af03566bc5d18def8431540f5dcd5f570057e60 /pkg/sentry | |
parent | ca666e6907ceeb901fc4d5ce1a64653c7332dfa6 (diff) | |
parent | 1c0324d5a19535cac7369abf2e32f6148fcdcd80 (diff) |
Merge release-20190806.1-161-g1c0324d (automated)
Diffstat (limited to 'pkg/sentry')
-rwxr-xr-x | pkg/sentry/hostcpu/getcpu_arm64.s | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/pkg/sentry/hostcpu/getcpu_arm64.s b/pkg/sentry/hostcpu/getcpu_arm64.s new file mode 100755 index 000000000..caf9abb89 --- /dev/null +++ b/pkg/sentry/hostcpu/getcpu_arm64.s @@ -0,0 +1,28 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "textflag.h" + +// GetCPU makes the getcpu(unsigned *cpu, unsigned *node, NULL) syscall for +// the lack of an optimazed way of getting the current CPU number on arm64. + +// func GetCPU() (cpu uint32) +TEXT ·GetCPU(SB), NOSPLIT, $0-4 + MOVW ZR, cpu+0(FP) + MOVD $cpu+0(FP), R0 + MOVD $0x0, R1 // unused + MOVD $0x0, R2 // unused + MOVD $0xA8, R8 // SYS_GETCPU + SVC + RET |