1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2024 Google LLC
*
* Example for symbol pointers. When compiled with Clang, gendwarfkyms
* uses a symbol pointer for `f`.
*
* $ clang -g -c examples/symbolptr.c -o examples/symbolptr.o
* $ echo -e "f\ng\np" | ./gendwarfksyms -d examples/symbolptr.o
*/
/* Kernel macros for userspace testing. */
#ifndef __used
#define __used __attribute__((__used__))
#endif
#ifndef __section
#define __section(section) __attribute__((__section__(section)))
#endif
#define __GENDWARFKSYMS_EXPORT(sym) \
static typeof(sym) *__gendwarfksyms_ptr_##sym __used \
__section(".discard.gendwarfksyms") = &sym;
extern void f(unsigned int arg);
void g(int *arg);
void g(int *arg) {}
struct s;
extern struct s *p;
__GENDWARFKSYMS_EXPORT(f);
__GENDWARFKSYMS_EXPORT(g);
__GENDWARFKSYMS_EXPORT(p);
|
