Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_LINKAGE_H
2#define _LINUX_LINKAGE_H
3
4#include <linux/compiler.h>
5#include <asm/linkage.h>
6
7#define notrace __attribute__((no_instrument_function))
8
9#ifdef __cplusplus
10#define CPP_ASMLINKAGE extern "C"
11#else
12#define CPP_ASMLINKAGE
13#endif
14
15#ifndef asmlinkage
16#define asmlinkage CPP_ASMLINKAGE
17#endif
18
19#ifndef asmregparm
20# define asmregparm
21#endif
22
23#define __page_aligned_data __section(.data.page_aligned) __aligned(PAGE_SIZE)
24#define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE)
25
26/*
27 * This is used by architectures to keep arguments on the stack
28 * untouched by the compiler by keeping them live until the end.
29 * The argument stack may be owned by the assembly-language
30 * caller, not the callee, and gcc doesn't always understand
31 * that.
32 *
33 * We have the return value, and a maximum of six arguments.
34 *
35 * This should always be followed by a "return ret" for the
36 * protection to work (ie no more work that the compiler might
37 * end up needing stack temporaries for).
38 */
39/* Assembly files may be compiled with -traditional .. */
40#ifndef __ASSEMBLY__
41#ifndef asmlinkage_protect
42# define asmlinkage_protect(n, ret, args...) do { } while (0)
43#endif
44#endif
45
46#ifndef __ALIGN
47#define __ALIGN .align 4,0x90
48#define __ALIGN_STR ".align 4,0x90"
49#endif
50
51#ifdef __ASSEMBLY__
52
53#define ALIGN __ALIGN
54#define ALIGN_STR __ALIGN_STR
55
56#ifndef ENTRY
57#define ENTRY(name) \
58 .globl name; \
59 ALIGN; \
60 name:
61#endif
62
63#ifndef WEAK
64#define WEAK(name) \
65 .weak name; \
66 name:
67#endif
68
69#define KPROBE_ENTRY(name) \
70 .pushsection .kprobes.text, "ax"; \
71 ENTRY(name)
72
73#define KPROBE_END(name) \
74 END(name); \
75 .popsection
76
77#ifndef END
78#define END(name) \
79 .size name, .-name
80#endif
81
82/* If symbol 'name' is treated as a subroutine (gets called, and returns)
83 * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
84 * static analysis tools such as stack depth analyzer.
85 */
86#ifndef ENDPROC
87#define ENDPROC(name) \
88 .type name, @function; \
89 END(name)
90#endif
91
92#endif
93
94#define NORET_TYPE /**/
95#define ATTRIB_NORET __attribute__((noreturn))
96#define NORET_AND noreturn,
97
98#endif