17b453719SMasahiro Yamada /* SPDX-License-Identifier: GPL-2.0-only */
27b453719SMasahiro Yamada /*
37b453719SMasahiro Yamada  * Please do not include this explicitly.
47b453719SMasahiro Yamada  * This is used by C files generated by modpost.
57b453719SMasahiro Yamada  */
67b453719SMasahiro Yamada 
77b453719SMasahiro Yamada #ifndef __LINUX_EXPORT_INTERNAL_H__
87b453719SMasahiro Yamada #define __LINUX_EXPORT_INTERNAL_H__
97b453719SMasahiro Yamada 
107b453719SMasahiro Yamada #include <linux/compiler.h>
117b453719SMasahiro Yamada #include <linux/types.h>
127b453719SMasahiro Yamada 
13ddb5cdbaSMasahiro Yamada #if defined(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS)
14ddb5cdbaSMasahiro Yamada /*
15ddb5cdbaSMasahiro Yamada  * relative reference: this reduces the size by half on 64-bit architectures,
16ddb5cdbaSMasahiro Yamada  * and eliminates the need for absolute relocations that require runtime
17ddb5cdbaSMasahiro Yamada  * processing on relocatable kernels.
18ddb5cdbaSMasahiro Yamada  */
19f6847807SHelge Deller #define __KSYM_ALIGN		".balign 4"
20ddb5cdbaSMasahiro Yamada #define __KSYM_REF(sym)		".long " #sym "- ."
21ddb5cdbaSMasahiro Yamada #elif defined(CONFIG_64BIT)
22f6847807SHelge Deller #define __KSYM_ALIGN		".balign 8"
23ddb5cdbaSMasahiro Yamada #define __KSYM_REF(sym)		".quad " #sym
24ddb5cdbaSMasahiro Yamada #else
25f6847807SHelge Deller #define __KSYM_ALIGN		".balign 4"
26ddb5cdbaSMasahiro Yamada #define __KSYM_REF(sym)		".long " #sym
27ddb5cdbaSMasahiro Yamada #endif
28ddb5cdbaSMasahiro Yamada 
29ddb5cdbaSMasahiro Yamada /*
30ddb5cdbaSMasahiro Yamada  * For every exported symbol, do the following:
31ddb5cdbaSMasahiro Yamada  *
32ddb5cdbaSMasahiro Yamada  * - Put the name of the symbol and namespace (empty string "" for none) in
33ddb5cdbaSMasahiro Yamada  *   __ksymtab_strings.
34ddb5cdbaSMasahiro Yamada  * - Place a struct kernel_symbol entry in the __ksymtab section.
35ddb5cdbaSMasahiro Yamada  *
36ddb5cdbaSMasahiro Yamada  * Note on .section use: we specify progbits since usage of the "M" (SHF_MERGE)
37ddb5cdbaSMasahiro Yamada  * section flag requires it. Use '%progbits' instead of '@progbits' since the
38ddb5cdbaSMasahiro Yamada  * former apparently works on all arches according to the binutils source.
39ddb5cdbaSMasahiro Yamada  */
40ddb5cdbaSMasahiro Yamada #define __KSYMTAB(name, sym, sec, ns)						\
41ddb5cdbaSMasahiro Yamada 	asm("	.section \"__ksymtab_strings\",\"aMS\",%progbits,1"	"\n"	\
42ddb5cdbaSMasahiro Yamada 	    "__kstrtab_" #name ":"					"\n"	\
43ddb5cdbaSMasahiro Yamada 	    "	.asciz \"" #name "\""					"\n"	\
44ddb5cdbaSMasahiro Yamada 	    "__kstrtabns_" #name ":"					"\n"	\
45ddb5cdbaSMasahiro Yamada 	    "	.asciz \"" ns "\""					"\n"	\
46ddb5cdbaSMasahiro Yamada 	    "	.previous"						"\n"	\
47ddb5cdbaSMasahiro Yamada 	    "	.section \"___ksymtab" sec "+" #name "\", \"a\""	"\n"	\
48f6847807SHelge Deller 		__KSYM_ALIGN						"\n"	\
49ddb5cdbaSMasahiro Yamada 	    "__ksymtab_" #name ":"					"\n"	\
50ddb5cdbaSMasahiro Yamada 		__KSYM_REF(sym)						"\n"	\
51ddb5cdbaSMasahiro Yamada 		__KSYM_REF(__kstrtab_ ##name)				"\n"	\
52ddb5cdbaSMasahiro Yamada 		__KSYM_REF(__kstrtabns_ ##name)				"\n"	\
53ddb5cdbaSMasahiro Yamada 	    "	.previous"						"\n"	\
54ddb5cdbaSMasahiro Yamada 	)
55ddb5cdbaSMasahiro Yamada 
569e0be3f5SLukas Bulwahn #if defined(CONFIG_PARISC) && defined(CONFIG_64BIT)
5708700ec7SMasahiro Yamada #define KSYM_FUNC(name)		P%name
58ddb5cdbaSMasahiro Yamada #else
59ddb5cdbaSMasahiro Yamada #define KSYM_FUNC(name)		name
60ddb5cdbaSMasahiro Yamada #endif
61ddb5cdbaSMasahiro Yamada 
62ddb5cdbaSMasahiro Yamada #define KSYMTAB_FUNC(name, sec, ns)	__KSYMTAB(name, KSYM_FUNC(name), sec, ns)
63ddb5cdbaSMasahiro Yamada #define KSYMTAB_DATA(name, sec, ns)	__KSYMTAB(name, name, sec, ns)
64ddb5cdbaSMasahiro Yamada 
657b453719SMasahiro Yamada #define SYMBOL_CRC(sym, crc, sec)   \
66f3304ecdSMasahiro Yamada 	asm(".section \"___kcrctab" sec "+" #sym "\",\"a\""	"\n" \
67*753547deSHelge Deller 	    ".balign 4"						"\n" \
68f3304ecdSMasahiro Yamada 	    "__crc_" #sym ":"					"\n" \
69f3304ecdSMasahiro Yamada 	    ".long " #crc					"\n" \
70f3304ecdSMasahiro Yamada 	    ".previous"						"\n")
717b453719SMasahiro Yamada 
727b453719SMasahiro Yamada #endif /* __LINUX_EXPORT_INTERNAL_H__ */
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