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| author | Michael Pratt <mpratt@google.com> | 2021-11-04 17:21:13 -0400 |
|---|---|---|
| committer | Michael Pratt <mpratt@google.com> | 2022-08-17 20:02:39 +0000 |
| commit | 876d477b0e3b27ae136a7e8dfceaf0ec72bddea6 (patch) | |
| tree | 072086591c4b798b11ca78b95f91d4347f8e1ca7 /src/runtime/os_linux_arm.go | |
| parent | c7f870ebc41029e07e7ffd8ff2d96b91fd83cd40 (diff) | |
| download | go-876d477b0e3b27ae136a7e8dfceaf0ec72bddea6.tar.xz | |
runtime: refactor ARM VDSO call setup to helper
We have a very complex process to make VDSO calls on ARM. Create a
wrapper helper function which reduces duplication and allows for
additional calls from other packages.
vdsoCall has a few differences from the original code in
walltime/nanotime:
* It does not use R0-R3, as they are passed through as arguments to fn.
* It does not save g if g.m.gsignal.stack.lo is zero. This may occur if
it called at startup on g0 between assigning g0.m.gsignal and setting
its stack.
For #49182
Change-Id: I51aca514b4835b71142011341d2f09125334d30f
Reviewed-on: https://go-review.googlesource.com/c/go/+/362795
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Diffstat (limited to 'src/runtime/os_linux_arm.go')
| -rw-r--r-- | src/runtime/os_linux_arm.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/runtime/os_linux_arm.go b/src/runtime/os_linux_arm.go index b590da750f..bd3ab44a11 100644 --- a/src/runtime/os_linux_arm.go +++ b/src/runtime/os_linux_arm.go @@ -11,6 +11,8 @@ const ( _HWCAP_VFPv3 = 1 << 13 // introduced in 2.6.30 ) +func vdsoCall() + func checkgoarm() { // On Android, /proc/self/auxv might be unreadable and hwcap won't // reflect the CPU capabilities. Assume that every Android arm device |