7324 stack needs to be sufficiently aligned for SSE before init_array are called

*** 25,35 ****
   *
   *
   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
- #pragma ident   "%Z%%M% %I%     %E% SMI"
  
  /*
   * Bootstrap routine for run-time linker.
   * We get control from exec which has loaded our text and
   * data into the process' address space and created the process
--- 25,34 ----
*** 93,107 ****
--- 92,112 ----
          .globl  _setup
          .globl  _GLOBAL_OFFSET_TABLE_
          .type   _rt_boot,@function
          .align  4
  
+         / init is called from the _init symbol in the CRT, however .init_array
+         / are called "naturally" from call_init.  Because of that, we need the
+         / stack aligned here so that initializers called via _array sections may
+         / safely use SIMD instructions.
  _rt_alias:
          jmp     .get_ip                 / in case we were invoked from libc.so
  _rt_boot:
          movl    %esp,%ebp               / save for referencing args
          subl    $EB_MAX_SIZE32,%esp     / make room for a max sized boot vector
+         andl    $-16,%esp
+         subl    $8,%esp
          movl    %esp,%esi               / use esi as a pointer to &eb[0]
          movl    $EB_ARGV,0(%esi)        / set up tag for argv
          leal    4(%ebp),%eax            / get address of argv
          movl    %eax,4(%esi)            / put after tag
          movl    $EB_ENVP,8(%esi)        / set up tag for envp