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1
2 /*--------------------------------------------------------------------*/
3 /*--- Darwin amd64 bootstrap.               m_start-amd64-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_amd64_darwin)
32
33 #include "pub_core_basics_asm.h"
34
35         .text
36         .align  3,0x90
37 Ldyld_stub_binding_helper:
38         pushq   %r11
39         leaq    ___dso_handle(%rip), %r11
40         pushq   %r11
41         jmpq    *Ldyld_lazy_symbol_binding_entry_point(%rip)
42
43         .dyld
44         .align  3
45 Ldyld_lazy_symbol_binding_entry_point:
46         .quad   0
47         .quad   0
48         .quad   0
49         .quad   0
50         .quad   0
51         .quad   Ldyld_stub_binding_helper
52         .quad   0
53
54                 
55         // Memory layout established by kernel:
56         //
57         //        0
58         //        executable_name
59         //        0
60         //        envp[n]
61         //        ...
62         //        envp[0]
63         //        0
64         //        argv[argc-1]
65         //        ...
66         // sp+8-> argv[0]
67         // sp  -> argc
68         
69         .text
70         .align 3,0x90
71         .globl __start
72 __start:
73         movq    %rsp, %rdi      // save &argc
74         andq    $-16, %rsp      // align stack
75         pushq   $0              // push NULL "return address" for backtraces
76         pushq   $0              // push fake saved ebp and align stack
77         movq    %rsp, %rbp      // save frame pointer
78         call    __start_in_C_darwin  // __start_in_C_darwin(&argc)
79         
80         // should not reach here
81         int $3
82         int $3
83
84 #endif // defined(VGP_amd64_darwin)
85
86 /*--------------------------------------------------------------------*/
87 /*--- end                                                          ---*/
88 /*--------------------------------------------------------------------*/