c70ff9f9be
The gc compiler has started permitting go:linkname comments with a
single argument to mean that a function should be externally visible
outside the package. Implement this in the Go frontend.
Change the libgo runtime package to use it, rather than repeating the
name just to export a function.
Remove a couple of unnecessary go:linkname comments on declarations.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192197
From-SVN: r275239
54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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import (
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"unsafe"
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)
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// For C code to call:
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//go:linkname minit
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func goenvs() {
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goenvs_unix()
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}
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// Called to initialize a new m (including the bootstrap m).
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// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
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func mpreinit(mp *m) {
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mp.gsignal = malg(true, true, &mp.gsignalstack, &mp.gsignalstacksize)
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mp.gsignal.m = mp
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}
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// minit is called to initialize a new m (including the bootstrap m).
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// Called on the new thread, cannot allocate memory.
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func minit() {
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minitSignals()
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// FIXME: only works on linux for now.
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getg().m.procid = uint64(gettid())
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}
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// Called from dropm to undo the effect of an minit.
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//go:nosplit
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//go:nowritebarrierrec
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func unminit() {
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unminitSignals()
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}
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var urandom_dev = []byte("/dev/urandom\x00")
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func getRandomData(r []byte) {
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if startupRandomData != nil {
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n := copy(r, startupRandomData)
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extendRandom(r, n)
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return
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}
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fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
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n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
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closefd(fd)
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extendRandom(r, int(n))
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}
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