projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bf49d9dd | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 22823ab4 AV |
2 | #ifndef __ASM_GENERIC_EXPORT_H |
| 3 | #define __ASM_GENERIC_EXPORT_H | |
| 4 | ||
| 7b453719 MY |
5 | /* |
| 6 | * This comment block is used by fixdep. Please do not remove. | |
| 7 | * | |
| 8 | * When CONFIG_MODVERSIONS is changed from n to y, all source files having | |
| 9 | * EXPORT_SYMBOL variants must be re-compiled because genksyms is run as a | |
| 10 | * side effect of the *.o build rule. | |
| 11 | */ | |
| 12 | ||
| 22823ab4 AV |
13 | #ifndef KSYM_FUNC |
| 14 | #define KSYM_FUNC(x) x | |
| 15 | #endif | |
| ed13fc33 MM |
16 | #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS |
| 17 | #define KSYM_ALIGN 4 | |
| 18 | #elif defined(CONFIG_64BIT) | |
| 22823ab4 | 19 | #define KSYM_ALIGN 8 |
| 22823ab4 | 20 | #else |
| 22823ab4 AV |
21 | #define KSYM_ALIGN 4 |
| 22 | #endif | |
| 22823ab4 | 23 | |
| 7290d580 AB |
24 | .macro __put, val, name |
| 25 | #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS | |
| 069e1c07 | 26 | .long \val - ., \name - ., 0 |
| 7290d580 | 27 | #elif defined(CONFIG_64BIT) |
| 8651ec01 | 28 | .quad \val, \name, 0 |
| 7290d580 | 29 | #else |
| 8651ec01 | 30 | .long \val, \name, 0 |
| 7290d580 AB |
31 | #endif |
| 32 | .endm | |
| 33 | ||
| 22823ab4 | 34 | /* |
| ce2b617c JY |
35 | * note on .section use: we specify progbits since usage of the "M" (SHF_MERGE) |
| 36 | * section flag requires it. Use '%progbits' instead of '@progbits' since the | |
| 37 | * former apparently works on all arches according to the binutils source. | |
| 22823ab4 | 38 | */ |
| ce2b617c | 39 | |
| 22823ab4 | 40 | .macro ___EXPORT_SYMBOL name,val,sec |
| 54effa65 | 41 | #if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS) |
| 22823ab4 AV |
42 | .section ___ksymtab\sec+\name,"a" |
| 43 | .balign KSYM_ALIGN | |
| 94e58e0a MY |
44 | __ksymtab_\name: |
| 45 | __put \val, __kstrtab_\name | |
| 22823ab4 | 46 | .previous |
| ce2b617c | 47 | .section __ksymtab_strings,"aMS",%progbits,1 |
| 94e58e0a | 48 | __kstrtab_\name: |
| 22823ab4 | 49 | .asciz "\name" |
| 22823ab4 | 50 | .previous |
| 22823ab4 AV |
51 | #endif |
| 52 | .endm | |
| 22823ab4 | 53 | |
| bbda5ec6 | 54 | #if defined(CONFIG_TRIM_UNUSED_KSYMS) |
| 22823ab4 AV |
55 | |
| 56 | #include <linux/kconfig.h> | |
| 57 | #include <generated/autoksyms.h> | |
| 58 | ||
| bbda5ec6 MY |
59 | .macro __ksym_marker sym |
| 60 | .section ".discard.ksym","a" | |
| 61 | __ksym_marker_\sym: | |
| 62 | .previous | |
| 63 | .endm | |
| 64 | ||
| 22823ab4 | 65 | #define __EXPORT_SYMBOL(sym, val, sec) \ |
| bbda5ec6 | 66 | __ksym_marker sym; \ |
| c0a0aba8 | 67 | __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) |
| 22823ab4 AV |
68 | #define __cond_export_sym(sym, val, sec, conf) \ |
| 69 | ___cond_export_sym(sym, val, sec, conf) | |
| 70 | #define ___cond_export_sym(sym, val, sec, enabled) \ | |
| 71 | __cond_export_sym_##enabled(sym, val, sec) | |
| 72 | #define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec | |
| 73 | #define __cond_export_sym_0(sym, val, sec) /* nothing */ | |
| 74 | ||
| 75 | #else | |
| 76 | #define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec | |
| 77 | #endif | |
| 78 | ||
| 79 | #define EXPORT_SYMBOL(name) \ | |
| 94e58e0a | 80 | __EXPORT_SYMBOL(name, KSYM_FUNC(name),) |
| 22823ab4 | 81 | #define EXPORT_SYMBOL_GPL(name) \ |
| 94e58e0a | 82 | __EXPORT_SYMBOL(name, KSYM_FUNC(name), _gpl) |
| 22823ab4 | 83 | #define EXPORT_DATA_SYMBOL(name) \ |
| 94e58e0a | 84 | __EXPORT_SYMBOL(name, name,) |
| 22823ab4 | 85 | #define EXPORT_DATA_SYMBOL_GPL(name) \ |
| 94e58e0a | 86 | __EXPORT_SYMBOL(name, name,_gpl) |
| 22823ab4 AV |
87 | |
| 88 | #endif |