Blame view
include/linux/linkage.h
2.69 KB
d7d243b52
SMARC-iMX8MQ Linu...
|
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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 |
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_LINKAGE_H
#define _LINUX_LINKAGE_H
#include <linux/compiler_types.h>
#include <linux/stringify.h>
#include <linux/export.h>
#include <asm/linkage.h>
/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
#ifndef ASM_NL
#define ASM_NL ;
#endif
#ifdef __cplusplus
#define CPP_ASMLINKAGE extern "C"
#else
#define CPP_ASMLINKAGE
#endif
#ifndef asmlinkage
#define asmlinkage CPP_ASMLINKAGE
#endif
#ifndef cond_syscall
#define cond_syscall(x) asm( \
".weak " __stringify(x) "
\t" \
".set " __stringify(x) "," \
__stringify(sys_ni_syscall))
#endif
#ifndef SYSCALL_ALIAS
#define SYSCALL_ALIAS(alias, name) asm( \
".globl " __stringify(alias) "
\t" \
".set " __stringify(alias) "," \
__stringify(name))
#endif
#define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE)
#define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE)
/*
* For assembly routines.
*
* Note when using these that you must specify the appropriate
* alignment directives yourself
*/
#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
/*
* This is used by architectures to keep arguments on the stack
* untouched by the compiler by keeping them live until the end.
* The argument stack may be owned by the assembly-language
* caller, not the callee, and gcc doesn't always understand
* that.
*
* We have the return value, and a maximum of six arguments.
*
* This should always be followed by a "return ret" for the
* protection to work (ie no more work that the compiler might
* end up needing stack temporaries for).
*/
/* Assembly files may be compiled with -traditional .. */
#ifndef __ASSEMBLY__
#ifndef asmlinkage_protect
# define asmlinkage_protect(n, ret, args...) do { } while (0)
#endif
#endif
#ifndef __ALIGN
#define __ALIGN .align 4,0x90
#define __ALIGN_STR ".align 4,0x90"
#endif
#ifdef __ASSEMBLY__
#ifndef LINKER_SCRIPT
#define ALIGN __ALIGN
#define ALIGN_STR __ALIGN_STR
#ifndef GLOBAL
#define GLOBAL(name) \
.globl name ASM_NL \
name:
#endif
#ifndef ENTRY
#define ENTRY(name) \
.globl name ASM_NL \
ALIGN ASM_NL \
name:
#endif
#endif /* LINKER_SCRIPT */
#ifndef WEAK
#define WEAK(name) \
.weak name ASM_NL \
ALIGN ASM_NL \
name:
#endif
#ifndef END
#define END(name) \
.size name, .-name
#endif
/* If symbol 'name' is treated as a subroutine (gets called, and returns)
* then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
* static analysis tools such as stack depth analyzer.
*/
#ifndef ENDPROC
#define ENDPROC(name) \
.type name, @function ASM_NL \
END(name)
#endif
#endif
#endif
|