code review 7543043: runtime: faster & safer hash function

src/pkg/runtime/signal_linux_386.c

 // 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 "signals_GOOS.h"
 #include "os_GOOS.h"
 
 void
@@ skipping 138 matching lines @@
                 runtime·throw("rt_sigaction failure");
 }
 
 #define AT_NULL         0
 #define AT_RANDOM       25
 #define AT_SYSINFO      32
 extern uint32 runtime·_vdso;
 
 #pragma textflag 7
 void
-runtime·linux_setup_vdso(int32 argc, void *argv_list)
+runtime·linux_setup_vdso(int32 argc, byte **argv)
 {
-        byte **argv = &argv_list;
         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·at_random_data = (byte*)auxv[1];
+                if(auxv[0] == AT_RANDOM) {
+                        runtime·startup_random_data = (byte*)auxv[1];
+                        runtime·startup_random_data_len = 16;
                         continue;
                 }
         }
 }