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// Copyright 2009 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.
#include "runtime.h"
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "textflag.h"
#define AT_NULL 0
#define AT_RANDOM 25
#define AT_SYSINFO 32
extern uint32 runtime·_vdso;
#pragma textflag NOSPLIT
void
runtime·linux_setup_vdso(int32 argc, byte **argv)
{
byte **envp;
uint32 *auxv;
// skip envp to get to ELF auxiliary vector.
for(envp = &argv[argc+1]; *envp != nil; envp++)
;
envp++;
for(auxv=(uint32*)envp; auxv[0] != AT_NULL; auxv += 2) {
if(auxv[0] == AT_SYSINFO) {
runtime·_vdso = auxv[1];
continue;
}
if(auxv[0] == AT_RANDOM) {
runtime·startup_random_data = (byte*)auxv[1];
runtime·startup_random_data_len = 16;
continue;
}
}
}
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