mirror of
https://github.com/golang/go
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38 lines
820 B
C
38 lines
820 B
C
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// 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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#include "runtime.h"
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#include "defs_GOOS_GOARCH.h"
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#include "os_GOOS.h"
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#define AT_NULL 0
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#define AT_RANDOM 25
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#define AT_SYSINFO 32
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extern uint32 runtime·_vdso;
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#pragma textflag 7
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void
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runtime·linux_setup_vdso(int32 argc, byte **argv)
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{
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byte **envp;
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uint32 *auxv;
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// skip envp to get to ELF auxiliary vector.
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for(envp = &argv[argc+1]; *envp != nil; envp++)
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;
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envp++;
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for(auxv=(uint32*)envp; auxv[0] != AT_NULL; auxv += 2) {
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if(auxv[0] == AT_SYSINFO) {
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runtime·_vdso = auxv[1];
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continue;
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}
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if(auxv[0] == AT_RANDOM) {
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runtime·startup_random_data = (byte*)auxv[1];
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runtime·startup_random_data_len = 16;
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continue;
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}
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}
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}
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