1 /* Copyright (C) 2003, 2005, 2010 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
24 static void (*libgcc_s_resume
) (struct _Unwind_Exception
*exc
);
25 static _Unwind_Reason_Code (*libgcc_s_personality
)
26 (_Unwind_State
, struct _Unwind_Exception
*, struct _Unwind_Context
*);
28 static void init (void) __attribute_used__
;
33 void *resume
, *personality
;
36 handle
= __libc_dlopen ("libgcc_s.so.1");
39 || (resume
= __libc_dlsym (handle
, "_Unwind_Resume")) == NULL
40 || (personality
= __libc_dlsym (handle
, "__gcc_personality_v0")) == NULL
)
41 __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
43 libgcc_s_resume
= resume
;
44 libgcc_s_personality
= personality
;
47 /* It's vitally important that _Unwind_Resume not have a stack frame; the
48 ARM unwinder relies on register state at entrance. So we write this in
52 " .globl _Unwind_Resume\n"
53 " .type _Unwind_Resume, %function\n"
55 " .cfi_sections .debug_frame\n"
56 " " CFI_STARTPROC
"\n"
57 " stmfd sp!, {r4, r5, r6, lr}\n"
58 " " CFI_ADJUST_CFA_OFFSET (16)" \n"
59 " " CFI_REL_OFFSET (r4
, 0) "\n"
60 " " CFI_REL_OFFSET (r5
, 4) "\n"
61 " " CFI_REL_OFFSET (r6
, 8) "\n"
62 " " CFI_REL_OFFSET (lr
, 12) "\n"
63 " " CFI_REMEMBER_STATE
"\n"
72 " ldmfd sp!, {r4, r5, r6, lr}\n"
73 " " CFI_ADJUST_CFA_OFFSET (-16) "\n"
74 " " CFI_RESTORE (r4
) "\n"
75 " " CFI_RESTORE (r5
) "\n"
76 " " CFI_RESTORE (r6
) "\n"
77 " " CFI_RESTORE (lr
) "\n"
79 " " CFI_RESTORE_STATE
"\n"
86 "1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 4\n"
88 "1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8\n"
90 "2: .word libgcc_s_resume(GOTOFF)\n"
91 " .size _Unwind_Resume, .-_Unwind_Resume\n"
95 __gcc_personality_v0 (_Unwind_State state
,
96 struct _Unwind_Exception
*ue_header
,
97 struct _Unwind_Context
*context
)
99 if (__builtin_expect (libgcc_s_personality
== NULL
, 0))
101 return libgcc_s_personality (state
, ue_header
, context
);