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9a0a462c | 1 | /* i386-specific implementation of profiling support. |
6d7e8eda | 2 | Copyright (C) 1997-2023 Free Software Foundation, Inc. |
5ae9d168 | 3 | This file is part of the GNU C Library. |
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4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
5ae9d168 UD |
9 | |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
5ae9d168 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
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18 | |
19 | #include <sysdep.h> | |
20 | ||
21 | /* We need a special version of the `mcount' function since for ix86 it | |
22 | must not clobber any register. This has several reasons: | |
23 | - there is a bug in gcc as of version 2.7.2.2 which prohibits the | |
24 | use of profiling together with nested functions | |
25 | - the ELF `fixup' function uses GCC's regparm feature | |
26 | - some (future) systems might want to pass parameters in registers. */ | |
27 | ||
28 | /* We must not pollute the global namespace. */ | |
29 | #define mcount_internal __mcount_internal | |
30 | ||
4ebf934e | 31 | extern void mcount_internal (u_long frompc, u_long selfpc) |
8bcdb7e0 | 32 | __attribute__ ((regparm (2))) attribute_hidden; |
5ae9d168 | 33 | |
4ebf934e FW |
34 | #define _MCOUNT_DECL(frompc, selfpc) \ |
35 | __attribute__ ((regparm (2))) \ | |
36 | void mcount_internal (u_long frompc, u_long selfpc) | |
5ae9d168 UD |
37 | |
38 | ||
9a0a462c | 39 | /* Define MCOUNT as empty since we have the implementation in another |
5ae9d168 UD |
40 | file. */ |
41 | #define MCOUNT |