l4/pkg/valgrind/src/valgrind-3.6.0-svn/coregrind/m_start-x86-darwin.S

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- Darwin x86 bootstrap.                   m_start-x86-darwin.S ---*/
   4 /*--------------------------------------------------------------------*/
   5
   6 /*
   7    This file is part of Valgrind, a dynamic binary instrumentation
   8    framework.
   9
  10    Copyright (C) 2007 Apple Inc.
  11       Greg Parker  gparker@apple.com
  12
  13    This program is free software; you can redistribute it and/or
  14    modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation; either version 2 of the
  16    License, or (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful, but
  19    WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21    General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  26    02111-1307, USA.
  27
  28    The GNU General Public License is contained in the file COPYING.
  29 */
  30
  31 #if defined(VGP_x86_darwin)
  32
  33 #include "pub_core_basics_asm.h"
  34
  35         .text
  36         .align  2,0x90
  37 Ldyld_stub_binding_helper:
  38         pushl   $__mh_execute_header
  39         jmpl    *Ldyld_lazy_symbol_binding_entry_point
  40
  41         .dyld
  42         .align  2
  43 Ldyld_lazy_symbol_binding_entry_point:
  44         .long   0
  45         .long   0
  46         .long   0
  47         .long   0
  48         .long   0
  49         .long   Ldyld_stub_binding_helper
  50         .long   0
  51
  52
  53         // Memory layout established by kernel:
  54         //
  55         //        0
  56         //        executable_name
  57         //        0
  58         //        envp[n]
  59         //        ...
  60         //        envp[0]
  61         //        0
  62         //        argv[argc-1]
  63         //        ...
  64         // sp+4-> argv[0]
  65         // sp  -> argc
  66
  67         .text
  68         .align 2,0x90
  69         .globl __start
  70 __start:
  71         movl    %esp, %eax      // save &argc
  72         andl    $-16, %esp      // align stack
  73         pushl   $0              // push NULL "return address" for backtraces
  74         pushl   $0              // push fake saved ebp
  75         movl    %esp, %ebp      // save frame pointer
  76         pushl   $0              // align stack
  77         pushl   %eax            // start_in_C_darwin(&argc)
  78         call    __start_in_C_darwin
  79
  80         // should not reach here
  81         int $3
  82         int $3
  83
  84 #endif // defined(VGP_x86_darwin)
  85
  86 /*--------------------------------------------------------------------*/
  87 /*--- end                                                          ---*/
  88 /*--------------------------------------------------------------------*/