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