[linux-block.git] / include / linux / linkage.h

/* 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) "\n\t"			\
	".set  " __stringify(x) ","			\
		 __stringify(sys_ni_syscall))
#endif

#ifndef SYSCALL_ALIAS
#define SYSCALL_ALIAS(alias, name) asm(			\
	".globl " __stringify(alias) "\n\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__

/* SYM_T_FUNC -- type used by assembler to mark functions */
#ifndef SYM_T_FUNC
#define SYM_T_FUNC				STT_FUNC
#endif

/* SYM_T_OBJECT -- type used by assembler to mark data */
#ifndef SYM_T_OBJECT
#define SYM_T_OBJECT				STT_OBJECT
#endif

/* SYM_T_NONE -- type used by assembler to mark entries of unknown type */
#ifndef SYM_T_NONE
#define SYM_T_NONE				STT_NOTYPE
#endif

/* SYM_A_* -- align the symbol? */
#define SYM_A_ALIGN				ALIGN
#define SYM_A_NONE				/* nothing */

/* SYM_L_* -- linkage of symbols */
#define SYM_L_GLOBAL(name)			.globl name
#define SYM_L_WEAK(name)			.weak name
#define SYM_L_LOCAL(name)			/* nothing */

#ifndef LINKER_SCRIPT
#define ALIGN __ALIGN
#define ALIGN_STR __ALIGN_STR

/* === DEPRECATED annotations === */

#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
#ifndef GLOBAL
/* deprecated, use SYM_DATA*, SYM_ENTRY, or similar */
#define GLOBAL(name) \
	.globl name ASM_NL \
	name:
#endif

#ifndef ENTRY
/* deprecated, use SYM_FUNC_START */
#define ENTRY(name) \
	SYM_FUNC_START(name)
#endif
#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */
#endif /* LINKER_SCRIPT */

#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
#ifndef WEAK
/* deprecated, use SYM_FUNC_START_WEAK* */
#define WEAK(name)	   \
	SYM_FUNC_START_WEAK(name)
#endif

#ifndef END
/* deprecated, use SYM_FUNC_END, SYM_DATA_END, or SYM_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
/* deprecated, use SYM_FUNC_END */
#define ENDPROC(name) \
	SYM_FUNC_END(name)
#endif
#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */

/* === generic annotations === */

/* SYM_ENTRY -- use only if you have to for non-paired symbols */
#ifndef SYM_ENTRY
#define SYM_ENTRY(name, linkage, align...)		\
	linkage(name) ASM_NL				\
	align ASM_NL					\
	name:
#endif

/* SYM_START -- use only if you have to */
#ifndef SYM_START
#define SYM_START(name, linkage, align...)		\
	SYM_ENTRY(name, linkage, align)
#endif

/* SYM_END -- use only if you have to */
#ifndef SYM_END
#define SYM_END(name, sym_type)				\
	.type name sym_type ASM_NL			\
	.set .L__sym_size_##name, .-name ASM_NL		\
	.size name, .L__sym_size_##name
#endif

/* SYM_ALIAS -- use only if you have to */
#ifndef SYM_ALIAS
#define SYM_ALIAS(alias, name, sym_type, linkage)			\
	linkage(alias) ASM_NL						\
	.set alias, name ASM_NL						\
	.type alias sym_type ASM_NL					\
	.set .L__sym_size_##alias, .L__sym_size_##name ASM_NL		\
	.size alias, .L__sym_size_##alias
#endif

/* === code annotations === */

/*
 * FUNC -- C-like functions (proper stack frame etc.)
 * CODE -- non-C code (e.g. irq handlers with different, special stack etc.)
 *
 * Objtool validates stack for FUNC, but not for CODE.
 * Objtool generates debug info for both FUNC & CODE, but needs special
 * annotations for each CODE's start (to describe the actual stack frame).
 *
 * Objtool requires that all code must be contained in an ELF symbol. Symbol
 * names that have a  .L prefix do not emit symbol table entries. .L
 * prefixed symbols can be used within a code region, but should be avoided for
 * denoting a range of code via ``SYM_*_START/END`` annotations.
 *
 * ALIAS -- does not generate debug info -- the aliased function will
 */

/* SYM_INNER_LABEL_ALIGN -- only for labels in the middle of code */
#ifndef SYM_INNER_LABEL_ALIGN
#define SYM_INNER_LABEL_ALIGN(name, linkage)	\
	.type name SYM_T_NONE ASM_NL			\
	SYM_ENTRY(name, linkage, SYM_A_ALIGN)
#endif

/* SYM_INNER_LABEL -- only for labels in the middle of code */
#ifndef SYM_INNER_LABEL
#define SYM_INNER_LABEL(name, linkage)		\
	.type name SYM_T_NONE ASM_NL			\
	SYM_ENTRY(name, linkage, SYM_A_NONE)
#endif

/* SYM_FUNC_START -- use for global functions */
#ifndef SYM_FUNC_START
#define SYM_FUNC_START(name)				\
	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
#endif

/* SYM_FUNC_START_NOALIGN -- use for global functions, w/o alignment */
#ifndef SYM_FUNC_START_NOALIGN
#define SYM_FUNC_START_NOALIGN(name)			\
	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
#endif

/* SYM_FUNC_START_LOCAL -- use for local functions */
#ifndef SYM_FUNC_START_LOCAL
#define SYM_FUNC_START_LOCAL(name)			\
	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
#endif

/* SYM_FUNC_START_LOCAL_NOALIGN -- use for local functions, w/o alignment */
#ifndef SYM_FUNC_START_LOCAL_NOALIGN
#define SYM_FUNC_START_LOCAL_NOALIGN(name)		\
	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
#endif

/* SYM_FUNC_START_WEAK -- use for weak functions */
#ifndef SYM_FUNC_START_WEAK
#define SYM_FUNC_START_WEAK(name)			\
	SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)
#endif

/* SYM_FUNC_START_WEAK_NOALIGN -- use for weak functions, w/o alignment */
#ifndef SYM_FUNC_START_WEAK_NOALIGN
#define SYM_FUNC_START_WEAK_NOALIGN(name)		\
	SYM_START(name, SYM_L_WEAK, SYM_A_NONE)
#endif

/*
 * SYM_FUNC_END -- the end of SYM_FUNC_START_LOCAL, SYM_FUNC_START,
 * SYM_FUNC_START_WEAK, ...
 */
#ifndef SYM_FUNC_END
#define SYM_FUNC_END(name)				\
	SYM_END(name, SYM_T_FUNC)
#endif

/*
 * SYM_FUNC_ALIAS -- define a global alias for an existing function
 */
#ifndef SYM_FUNC_ALIAS
#define SYM_FUNC_ALIAS(alias, name)					\
	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_GLOBAL)
#endif

/*
 * SYM_FUNC_ALIAS_LOCAL -- define a local alias for an existing function
 */
#ifndef SYM_FUNC_ALIAS_LOCAL
#define SYM_FUNC_ALIAS_LOCAL(alias, name)				\
	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_LOCAL)
#endif

/*
 * SYM_FUNC_ALIAS_WEAK -- define a weak global alias for an existing function
 */
#ifndef SYM_FUNC_ALIAS_WEAK
#define SYM_FUNC_ALIAS_WEAK(alias, name)				\
	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_WEAK)
#endif

/* SYM_CODE_START -- use for non-C (special) functions */
#ifndef SYM_CODE_START
#define SYM_CODE_START(name)				\
	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
#endif

/* SYM_CODE_START_NOALIGN -- use for non-C (special) functions, w/o alignment */
#ifndef SYM_CODE_START_NOALIGN
#define SYM_CODE_START_NOALIGN(name)			\
	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
#endif

/* SYM_CODE_START_LOCAL -- use for local non-C (special) functions */
#ifndef SYM_CODE_START_LOCAL
#define SYM_CODE_START_LOCAL(name)			\
	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
#endif

/*
 * SYM_CODE_START_LOCAL_NOALIGN -- use for local non-C (special) functions,
 * w/o alignment
 */
#ifndef SYM_CODE_START_LOCAL_NOALIGN
#define SYM_CODE_START_LOCAL_NOALIGN(name)		\
	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
#endif

/* SYM_CODE_END -- the end of SYM_CODE_START_LOCAL, SYM_CODE_START, ... */
#ifndef SYM_CODE_END
#define SYM_CODE_END(name)				\
	SYM_END(name, SYM_T_NONE)
#endif

/* === data annotations === */

/* SYM_DATA_START -- global data symbol */
#ifndef SYM_DATA_START
#define SYM_DATA_START(name)				\
	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
#endif

/* SYM_DATA_START -- local data symbol */
#ifndef SYM_DATA_START_LOCAL
#define SYM_DATA_START_LOCAL(name)			\
	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
#endif

/* SYM_DATA_END -- the end of SYM_DATA_START symbol */
#ifndef SYM_DATA_END
#define SYM_DATA_END(name)				\
	SYM_END(name, SYM_T_OBJECT)
#endif

/* SYM_DATA_END_LABEL -- the labeled end of SYM_DATA_START symbol */
#ifndef SYM_DATA_END_LABEL
#define SYM_DATA_END_LABEL(name, linkage, label)	\
	linkage(label) ASM_NL				\
	.type label SYM_T_OBJECT ASM_NL			\
	label:						\
	SYM_END(name, SYM_T_OBJECT)
#endif

/* SYM_DATA -- start+end wrapper around simple global data */
#ifndef SYM_DATA
#define SYM_DATA(name, data...)				\
	SYM_DATA_START(name) ASM_NL				\
	data ASM_NL						\
	SYM_DATA_END(name)
#endif

/* SYM_DATA_LOCAL -- start+end wrapper around simple local data */
#ifndef SYM_DATA_LOCAL
#define SYM_DATA_LOCAL(name, data...)			\
	SYM_DATA_START_LOCAL(name) ASM_NL			\
	data ASM_NL						\
	SYM_DATA_END(name)
#endif

#endif /* __ASSEMBLY__ */

#endif /* _LINUX_LINKAGE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_LINKAGE_H
	3	#define _LINUX_LINKAGE_H
	4
d1515582	5	#include <linux/compiler_types.h>
e1b5bb6d	6	#include <linux/stringify.h>
f8ce1faf	7	#include <linux/export.h>
1da177e4 LT	8	#include <asm/linkage.h>
1da177e4 LT	9
9df62f05 CG	10	/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
	11	#ifndef ASM_NL
	12	#define ASM_NL ;
	13	#endif
	14
1da177e4	15	#ifdef __cplusplus
3adc1bea	16	#define CPP_ASMLINKAGE extern "C"
1da177e4	17	#else
3adc1bea	18	#define CPP_ASMLINKAGE
1da177e4 LT	19	#endif
	20
	21	#ifndef asmlinkage
	22	#define asmlinkage CPP_ASMLINKAGE
	23	#endif
	24
e1b5bb6d	25	#ifndef cond_syscall
f8ce1faf	26	#define cond_syscall(x) asm( \
00979ce4 MY	27	".weak " __stringify(x) "\n\t" \
	28	".set " __stringify(x) "," \
	29	__stringify(sys_ni_syscall))
e1b5bb6d AV	30	#endif
	31
	32	#ifndef SYSCALL_ALIAS
f8ce1faf	33	#define SYSCALL_ALIAS(alias, name) asm( \
00979ce4 MY	34	".globl " __stringify(alias) "\n\t" \
	35	".set " __stringify(alias) "," \
	36	__stringify(name))
e1b5bb6d AV	37	#endif
e1b5bb6d AV	38
33def849 JP	39	#define __page_aligned_data __section(".data..page_aligned") __aligned(PAGE_SIZE)
33def849 JP	40	#define __page_aligned_bss __section(".bss..page_aligned") __aligned(PAGE_SIZE)
a7bf0bd5	41
d2af12ae TA	42	/*
	43	* For assembly routines.
	44	*
	45	* Note when using these that you must specify the appropriate
	46	* alignment directives yourself
	47	*/
75b13483	48	#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
7c74df07	49	#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
d2af12ae	50
d10d89ec LT	51	/*
	52	* This is used by architectures to keep arguments on the stack
	53	* untouched by the compiler by keeping them live until the end.
	54	* The argument stack may be owned by the assembly-language
	55	* caller, not the callee, and gcc doesn't always understand
	56	* that.
	57	*
	58	* We have the return value, and a maximum of six arguments.
	59	*
	60	* This should always be followed by a "return ret" for the
	61	* protection to work (ie no more work that the compiler might
	62	* end up needing stack temporaries for).
	63	*/
b0fac023 HC	64	/* Assembly files may be compiled with -traditional .. */
b0fac023 HC	65	#ifndef __ASSEMBLY__
54a01510 RM	66	#ifndef asmlinkage_protect
54a01510 RM	67	# define asmlinkage_protect(n, ret, args...) do { } while (0)
1da177e4	68	#endif
b0fac023	69	#endif
1da177e4 LT	70
	71	#ifndef __ALIGN
	72	#define __ALIGN .align 4,0x90
	73	#define __ALIGN_STR ".align 4,0x90"
	74	#endif
	75
	76	#ifdef __ASSEMBLY__
	77
ffedeeb7 JS	78	/* SYM_T_FUNC -- type used by assembler to mark functions */
	79	#ifndef SYM_T_FUNC
	80	#define SYM_T_FUNC STT_FUNC
	81	#endif
	82
	83	/* SYM_T_OBJECT -- type used by assembler to mark data */
	84	#ifndef SYM_T_OBJECT
	85	#define SYM_T_OBJECT STT_OBJECT
	86	#endif
	87
	88	/* SYM_T_NONE -- type used by assembler to mark entries of unknown type */
	89	#ifndef SYM_T_NONE
	90	#define SYM_T_NONE STT_NOTYPE
	91	#endif
	92
	93	/* SYM_A_* -- align the symbol? */
	94	#define SYM_A_ALIGN ALIGN
	95	#define SYM_A_NONE /* nothing */
	96
	97	/* SYM_L_* -- linkage of symbols */
	98	#define SYM_L_GLOBAL(name) .globl name
	99	#define SYM_L_WEAK(name) .weak name
	100	#define SYM_L_LOCAL(name) /* nothing */
	101
42f29a25	102	#ifndef LINKER_SCRIPT
1da177e4 LT	103	#define ALIGN __ALIGN
	104	#define ALIGN_STR __ALIGN_STR
	105
ffedeeb7 JS	106	/* === DEPRECATED annotations === */
ffedeeb7 JS	107
2ce0d7f9	108	#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
ad697a1a	109	#ifndef GLOBAL
ffedeeb7	110	/* deprecated, use SYM_DATA, SYM_ENTRY, or similar /
ad697a1a MR	111	#define GLOBAL(name) \
	112	.globl name ASM_NL \
	113	name:
	114	#endif
	115
ab7efcc9	116	#ifndef ENTRY
ffedeeb7	117	/* deprecated, use SYM_FUNC_START */
1da177e4	118	#define ENTRY(name) \
ffedeeb7	119	SYM_FUNC_START(name)
ab7efcc9	120	#endif
2ce0d7f9	121	#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */
42f29a25	122	#endif /* LINKER_SCRIPT */
1da177e4	123
2ce0d7f9	124	#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
214541d1	125	#ifndef WEAK
ffedeeb7	126	/* deprecated, use SYM_FUNC_START_WEAK* */
214541d1	127	#define WEAK(name) \
ffedeeb7	128	SYM_FUNC_START_WEAK(name)
214541d1 RR	129	#endif
214541d1 RR	130
ab7efcc9	131	#ifndef END
ffedeeb7	132	/* deprecated, use SYM_FUNC_END, SYM_DATA_END, or SYM_END */
ab7efcc9	133	#define END(name) \
9df62f05	134	.size name, .-name
ab7efcc9 JB	135	#endif
ab7efcc9 JB	136
6b8be6df JR	137	/* If symbol 'name' is treated as a subroutine (gets called, and returns)
	138	* then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
	139	* static analysis tools such as stack depth analyzer.
	140	*/
ab7efcc9	141	#ifndef ENDPROC
ffedeeb7	142	/* deprecated, use SYM_FUNC_END */
ab7efcc9	143	#define ENDPROC(name) \
ffedeeb7 JS	144	SYM_FUNC_END(name)
ffedeeb7 JS	145	#endif
2ce0d7f9	146	#endif /* CONFIG_ARCH_USE_SYM_ANNOTATIONS */
ffedeeb7 JS	147
	148	/* === generic annotations === */
	149
	150	/* SYM_ENTRY -- use only if you have to for non-paired symbols */
	151	#ifndef SYM_ENTRY
	152	#define SYM_ENTRY(name, linkage, align...) \
	153	linkage(name) ASM_NL \
	154	align ASM_NL \
	155	name:
	156	#endif
	157
	158	/* SYM_START -- use only if you have to */
	159	#ifndef SYM_START
	160	#define SYM_START(name, linkage, align...) \
	161	SYM_ENTRY(name, linkage, align)
	162	#endif
	163
	164	/* SYM_END -- use only if you have to */
	165	#ifndef SYM_END
	166	#define SYM_END(name, sym_type) \
	167	.type name sym_type ASM_NL \
e0891269 MR	168	.set .L__sym_size_##name, .-name ASM_NL \
	169	.size name, .L__sym_size_##name
	170	#endif
	171
	172	/* SYM_ALIAS -- use only if you have to */
	173	#ifndef SYM_ALIAS
	174	#define SYM_ALIAS(alias, name, sym_type, linkage) \
	175	linkage(alias) ASM_NL \
	176	.set alias, name ASM_NL \
	177	.type alias sym_type ASM_NL \
	178	.set .L__sym_size_##alias, .L__sym_size_##name ASM_NL \
	179	.size alias, .L__sym_size_##alias
ffedeeb7 JS	180	#endif
	181
	182	/* === code annotations === */
	183
	184	/*
	185	* FUNC -- C-like functions (proper stack frame etc.)
	186	* CODE -- non-C code (e.g. irq handlers with different, special stack etc.)
	187	*
	188	* Objtool validates stack for FUNC, but not for CODE.
	189	* Objtool generates debug info for both FUNC & CODE, but needs special
	190	* annotations for each CODE's start (to describe the actual stack frame).
	191	*
5e6dca82 ND	192	* Objtool requires that all code must be contained in an ELF symbol. Symbol
	193	* names that have a .L prefix do not emit symbol table entries. .L
	194	* prefixed symbols can be used within a code region, but should be avoided for
	195	* denoting a range of code via ``SYM_*_START/END`` annotations.
	196	*
ffedeeb7 JS	197	* ALIAS -- does not generate debug info -- the aliased function will
	198	*/
	199
	200	/* SYM_INNER_LABEL_ALIGN -- only for labels in the middle of code */
	201	#ifndef SYM_INNER_LABEL_ALIGN
	202	#define SYM_INNER_LABEL_ALIGN(name, linkage) \
	203	.type name SYM_T_NONE ASM_NL \
	204	SYM_ENTRY(name, linkage, SYM_A_ALIGN)
	205	#endif
	206
	207	/* SYM_INNER_LABEL -- only for labels in the middle of code */
	208	#ifndef SYM_INNER_LABEL
	209	#define SYM_INNER_LABEL(name, linkage) \
	210	.type name SYM_T_NONE ASM_NL \
	211	SYM_ENTRY(name, linkage, SYM_A_NONE)
	212	#endif
	213
ffedeeb7 JS	214	/* SYM_FUNC_START -- use for global functions */
ffedeeb7 JS	215	#ifndef SYM_FUNC_START
ffedeeb7 JS	216	#define SYM_FUNC_START(name) \
	217	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
	218	#endif
	219
	220	/* SYM_FUNC_START_NOALIGN -- use for global functions, w/o alignment */
	221	#ifndef SYM_FUNC_START_NOALIGN
	222	#define SYM_FUNC_START_NOALIGN(name) \
	223	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
	224	#endif
	225
	226	/* SYM_FUNC_START_LOCAL -- use for local functions */
	227	#ifndef SYM_FUNC_START_LOCAL
ffedeeb7 JS	228	#define SYM_FUNC_START_LOCAL(name) \
ffedeeb7 JS	229	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
ab7efcc9	230	#endif
d0aaff97	231
ffedeeb7 JS	232	/* SYM_FUNC_START_LOCAL_NOALIGN -- use for local functions, w/o alignment */
	233	#ifndef SYM_FUNC_START_LOCAL_NOALIGN
	234	#define SYM_FUNC_START_LOCAL_NOALIGN(name) \
	235	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
1da177e4 LT	236	#endif
1da177e4 LT	237
ffedeeb7 JS	238	/* SYM_FUNC_START_WEAK -- use for weak functions */
	239	#ifndef SYM_FUNC_START_WEAK
	240	#define SYM_FUNC_START_WEAK(name) \
	241	SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)
1da177e4	242	#endif
ffedeeb7 JS	243
	244	/* SYM_FUNC_START_WEAK_NOALIGN -- use for weak functions, w/o alignment */
	245	#ifndef SYM_FUNC_START_WEAK_NOALIGN
	246	#define SYM_FUNC_START_WEAK_NOALIGN(name) \
	247	SYM_START(name, SYM_L_WEAK, SYM_A_NONE)
	248	#endif
	249
ffedeeb7 JS	250	/*
	251	* SYM_FUNC_END -- the end of SYM_FUNC_START_LOCAL, SYM_FUNC_START,
	252	* SYM_FUNC_START_WEAK, ...
	253	*/
	254	#ifndef SYM_FUNC_END
ffedeeb7 JS	255	#define SYM_FUNC_END(name) \
	256	SYM_END(name, SYM_T_FUNC)
	257	#endif
	258
e0891269 MR	259	/*
	260	* SYM_FUNC_ALIAS -- define a global alias for an existing function
	261	*/
	262	#ifndef SYM_FUNC_ALIAS
	263	#define SYM_FUNC_ALIAS(alias, name) \
	264	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_GLOBAL)
	265	#endif
	266
	267	/*
	268	* SYM_FUNC_ALIAS_LOCAL -- define a local alias for an existing function
	269	*/
	270	#ifndef SYM_FUNC_ALIAS_LOCAL
	271	#define SYM_FUNC_ALIAS_LOCAL(alias, name) \
	272	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_LOCAL)
	273	#endif
	274
	275	/*
	276	* SYM_FUNC_ALIAS_WEAK -- define a weak global alias for an existing function
	277	*/
	278	#ifndef SYM_FUNC_ALIAS_WEAK
	279	#define SYM_FUNC_ALIAS_WEAK(alias, name) \
	280	SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_WEAK)
	281	#endif
	282
ffedeeb7 JS	283	/* SYM_CODE_START -- use for non-C (special) functions */
	284	#ifndef SYM_CODE_START
	285	#define SYM_CODE_START(name) \
	286	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
	287	#endif
	288
	289	/* SYM_CODE_START_NOALIGN -- use for non-C (special) functions, w/o alignment */
	290	#ifndef SYM_CODE_START_NOALIGN
	291	#define SYM_CODE_START_NOALIGN(name) \
	292	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
	293	#endif
	294
	295	/* SYM_CODE_START_LOCAL -- use for local non-C (special) functions */
	296	#ifndef SYM_CODE_START_LOCAL
	297	#define SYM_CODE_START_LOCAL(name) \
	298	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
	299	#endif
	300
	301	/*
	302	* SYM_CODE_START_LOCAL_NOALIGN -- use for local non-C (special) functions,
	303	* w/o alignment
	304	*/
	305	#ifndef SYM_CODE_START_LOCAL_NOALIGN
	306	#define SYM_CODE_START_LOCAL_NOALIGN(name) \
	307	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
	308	#endif
	309
	310	/* SYM_CODE_END -- the end of SYM_CODE_START_LOCAL, SYM_CODE_START, ... */
	311	#ifndef SYM_CODE_END
	312	#define SYM_CODE_END(name) \
	313	SYM_END(name, SYM_T_NONE)
	314	#endif
	315
	316	/* === data annotations === */
	317
	318	/* SYM_DATA_START -- global data symbol */
	319	#ifndef SYM_DATA_START
	320	#define SYM_DATA_START(name) \
	321	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
	322	#endif
	323
	324	/* SYM_DATA_START -- local data symbol */
	325	#ifndef SYM_DATA_START_LOCAL
	326	#define SYM_DATA_START_LOCAL(name) \
	327	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
	328	#endif
	329
	330	/* SYM_DATA_END -- the end of SYM_DATA_START symbol */
	331	#ifndef SYM_DATA_END
	332	#define SYM_DATA_END(name) \
	333	SYM_END(name, SYM_T_OBJECT)
	334	#endif
	335
	336	/* SYM_DATA_END_LABEL -- the labeled end of SYM_DATA_START symbol */
	337	#ifndef SYM_DATA_END_LABEL
	338	#define SYM_DATA_END_LABEL(name, linkage, label) \
	339	linkage(label) ASM_NL \
	340	.type label SYM_T_OBJECT ASM_NL \
	341	label: \
	342	SYM_END(name, SYM_T_OBJECT)
	343	#endif
	344
	345	/* SYM_DATA -- start+end wrapper around simple global data */
	346	#ifndef SYM_DATA
347	#define SYM_DATA(name, data...) \
348	SYM_DATA_START(name) ASM_NL \
349	data ASM_NL \
350	SYM_DATA_END(name)
351	#endif
352
353	/* SYM_DATA_LOCAL -- start+end wrapper around simple local data */
354	#ifndef SYM_DATA_LOCAL
355	#define SYM_DATA_LOCAL(name, data...) \
356	SYM_DATA_START_LOCAL(name) ASM_NL \
357	data ASM_NL \
358	SYM_DATA_END(name)
359	#endif
360
361	#endif /* __ASSEMBLY__ */
362
363	#endif /* _LINUX_LINKAGE_H */