| Al Viro | 22823ab | 2016-01-11 10:54:54 -0500 | [diff] [blame] | 1 | #ifndef __ASM_GENERIC_EXPORT_H |
| 2 | #define __ASM_GENERIC_EXPORT_H |
| 3 | |
| 4 | #ifndef KSYM_FUNC |
| 5 | #define KSYM_FUNC(x) x |
| 6 | #endif |
| 7 | #ifdef CONFIG_64BIT |
| 8 | #define __put .quad |
| 9 | #ifndef KSYM_ALIGN |
| 10 | #define KSYM_ALIGN 8 |
| 11 | #endif |
| 12 | #ifndef KCRC_ALIGN |
| 13 | #define KCRC_ALIGN 8 |
| 14 | #endif |
| 15 | #else |
| 16 | #define __put .long |
| 17 | #ifndef KSYM_ALIGN |
| 18 | #define KSYM_ALIGN 4 |
| 19 | #endif |
| 20 | #ifndef KCRC_ALIGN |
| 21 | #define KCRC_ALIGN 4 |
| 22 | #endif |
| 23 | #endif |
| 24 | |
| 25 | #ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX |
| 26 | #define KSYM(name) _##name |
| 27 | #else |
| 28 | #define KSYM(name) name |
| 29 | #endif |
| 30 | |
| 31 | /* |
| 32 | * note on .section use: @progbits vs %progbits nastiness doesn't matter, |
| 33 | * since we immediately emit into those sections anyway. |
| 34 | */ |
| 35 | .macro ___EXPORT_SYMBOL name,val,sec |
| 36 | #ifdef CONFIG_MODULES |
| 37 | .globl KSYM(__ksymtab_\name) |
| 38 | .section ___ksymtab\sec+\name,"a" |
| 39 | .balign KSYM_ALIGN |
| 40 | KSYM(__ksymtab_\name): |
| 41 | __put \val, KSYM(__kstrtab_\name) |
| 42 | .previous |
| 43 | .section __ksymtab_strings,"a" |
| 44 | KSYM(__kstrtab_\name): |
| 45 | #ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX |
| 46 | .asciz "_\name" |
| 47 | #else |
| 48 | .asciz "\name" |
| 49 | #endif |
| 50 | .previous |
| 51 | #ifdef CONFIG_MODVERSIONS |
| 52 | .section ___kcrctab\sec+\name,"a" |
| 53 | .balign KCRC_ALIGN |
| 54 | KSYM(__kcrctab_\name): |
| 55 | __put KSYM(__crc_\name) |
| 56 | .weak KSYM(__crc_\name) |
| 57 | .previous |
| 58 | #endif |
| 59 | #endif |
| 60 | .endm |
| 61 | #undef __put |
| 62 | |
| 63 | #if defined(__KSYM_DEPS__) |
| 64 | |
| 65 | #define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym === |
| 66 | |
| 67 | #elif defined(CONFIG_TRIM_UNUSED_KSYMS) |
| 68 | |
| 69 | #include <linux/kconfig.h> |
| 70 | #include <generated/autoksyms.h> |
| 71 | |
| 72 | #define __EXPORT_SYMBOL(sym, val, sec) \ |
| Masahiro Yamada | c0a0aba | 2016-10-27 17:46:38 -0700 | [diff] [blame] | 73 | __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) |
| Al Viro | 22823ab | 2016-01-11 10:54:54 -0500 | [diff] [blame] | 74 | #define __cond_export_sym(sym, val, sec, conf) \ |
| 75 | ___cond_export_sym(sym, val, sec, conf) |
| 76 | #define ___cond_export_sym(sym, val, sec, enabled) \ |
| 77 | __cond_export_sym_##enabled(sym, val, sec) |
| 78 | #define __cond_export_sym_1(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec |
| 79 | #define __cond_export_sym_0(sym, val, sec) /* nothing */ |
| 80 | |
| 81 | #else |
| 82 | #define __EXPORT_SYMBOL(sym, val, sec) ___EXPORT_SYMBOL sym, val, sec |
| 83 | #endif |
| 84 | |
| 85 | #define EXPORT_SYMBOL(name) \ |
| 86 | __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)),) |
| 87 | #define EXPORT_SYMBOL_GPL(name) \ |
| 88 | __EXPORT_SYMBOL(name, KSYM_FUNC(KSYM(name)), _gpl) |
| 89 | #define EXPORT_DATA_SYMBOL(name) \ |
| 90 | __EXPORT_SYMBOL(name, KSYM(name),) |
| 91 | #define EXPORT_DATA_SYMBOL_GPL(name) \ |
| 92 | __EXPORT_SYMBOL(name, KSYM(name),_gpl) |
| 93 | |
| 94 | #endif |