Replace TLS_SLOT_BIONIC_PREINIT w/ shared globals

Instead of passing the address of a KernelArgumentBlock to libc.so for
initialization, use __loader_shared_globals() to initialize globals.

Most of the work happened in the previous CLs. This CL switches a few
KernelArgumentBlock::getauxval calls to [__bionic_]getauxval and stops
routing the KernelArgumentBlock address through the libc init functions.

Bug: none
Test: bionic unit tests
Change-Id: I96c7b02c21d55c454558b7a5a9243c682782f2dd

1 files changed, 2 insertions, 4 deletions

diff --git a/libc/bionic/bionic_arc4random.cpp b/libc/bionic/bionic_arc4random.cpp
index fa2617f0d..74ac43cb2 100644
--- a/libc/bionic/bionic_arc4random.cpp
+++ b/libc/bionic/bionic_arc4random.cpp
@@ -35,9 +35,7 @@
 
 #include <async_safe/log.h>
 
-#include "private/KernelArgumentBlock.h"
-
-void __libc_safe_arc4random_buf(void* buf, size_t n, KernelArgumentBlock& args) {
+void __libc_safe_arc4random_buf(void* buf, size_t n) {
   // Only call arc4random_buf once we have `/dev/urandom` because getentropy(3)
   // will fall back to using `/dev/urandom` if getrandom(2) fails, and abort if
   // if can't use `/dev/urandom`.
@@ -53,7 +51,7 @@ void __libc_safe_arc4random_buf(void* buf, size_t n, KernelArgumentBlock& args)
                      16 - at_random_bytes_consumed, n);
   }
 
-  memcpy(buf, reinterpret_cast<char*>(args.getauxval(AT_RANDOM)) + at_random_bytes_consumed, n);
+  memcpy(buf, reinterpret_cast<char*>(getauxval(AT_RANDOM)) + at_random_bytes_consumed, n);
   at_random_bytes_consumed += n;
   return;
 }