1/* libunwind - a platform-independent unwind library
2   Copyright (c) 2003, 2005 Hewlett-Packard Development Company, L.P.
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5This file is part of libunwind.
6
7Permission is hereby granted, free of charge, to any person obtaining
8a copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sublicense, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice shall be
16included in all copies or substantial portions of the Software.
17
18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
25
26#include "unwind_i.h"
27#include "dwarf_i.h"
28
29HIDDEN define_lock (x86_lock);
30HIDDEN int tdep_init_done;
31
32/* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
33
34HIDDEN const uint8_t dwarf_to_unw_regnum_map[19] =
35  {
36    UNW_X86_EAX, UNW_X86_ECX, UNW_X86_EDX, UNW_X86_EBX,
37    UNW_X86_ESP, UNW_X86_EBP, UNW_X86_ESI, UNW_X86_EDI,
38    UNW_X86_EIP, UNW_X86_EFLAGS, UNW_X86_TRAPNO,
39    UNW_X86_ST0, UNW_X86_ST1, UNW_X86_ST2, UNW_X86_ST3,
40    UNW_X86_ST4, UNW_X86_ST5, UNW_X86_ST6, UNW_X86_ST7
41  };
42
43HIDDEN void
44tdep_init (void)
45{
46  intrmask_t saved_mask;
47
48  sigfillset (&unwi_full_mask);
49
50  lock_acquire (&x86_lock, saved_mask);
51  {
52    if (tdep_init_done)
53      /* another thread else beat us to it... */
54      goto out;
55
56    mi_init ();
57
58    dwarf_init ();
59
60#ifndef UNW_REMOTE_ONLY
61    x86_local_addr_space_init ();
62#endif
63    tdep_init_done = 1;	/* signal that we're initialized... */
64  }
65 out:
66  lock_release (&x86_lock, saved_mask);
67}
68