| 1 |
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| 2 | |
| 3 | * Please do not include this explicitly.
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| 4 | * This is used by C files generated by modpost.
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| 5 |
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| 6 |
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| 7 | #ifndef __LINUX_EXPORT_INTERNAL_H__
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| 8 | #define __LINUX_EXPORT_INTERNAL_H__
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| 9 |
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| 10 | #include <linux/compiler.h>
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| 11 | #include <linux/types.h>
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| 12 |
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| 13 | #if defined(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS)
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| 14 | |
| 15 | * relative reference: this reduces the size by half on 64-bit architectures,
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| 16 | * and eliminates the need for absolute relocations that require runtime
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| 17 | * processing on relocatable kernels.
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| 18 |
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| 19 | #define __KSYM_ALIGN ".balign 4"
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| 20 | #define __KSYM_REF(sym) ".long " #sym "- ."
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| 21 | #elif defined(CONFIG_64BIT)
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| 22 | #define __KSYM_ALIGN ".balign 8"
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| 23 | #define __KSYM_REF(sym) ".quad " #sym
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| 24 | #else
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| 25 | #define __KSYM_ALIGN ".balign 4"
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| 26 | #define __KSYM_REF(sym) ".long " #sym
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| 27 | #endif
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| 28 |
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| 29 | |
| 30 | * For every exported symbol, do the following:
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| 31 | *
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| 32 | * - Put the name of the symbol and namespace (empty string "" for none) in
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| 33 | * __ksymtab_strings.
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| 34 | * - Place a struct kernel_symbol entry in the __ksymtab section.
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| 35 | *
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| 36 | * Note on .section use: we specify progbits since usage of the "M" (SHF_MERGE)
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| 37 | * section flag requires it. Use '%progbits' instead of '@progbits' since the
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| 38 | * former apparently works on all arches according to the binutils source.
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| 39 |
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| 40 | #define __KSYMTAB(name, sym, ns) \
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| 41 | asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \
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| 42 | "__kstrtab_" #name ":" "\n" \
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| 43 | " .asciz \"" #name "\"" "\n" \
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| 44 | "__kstrtabns_" #name ":" "\n" \
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| 45 | " .asciz \"" ns "\"" "\n" \
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| 46 | " .previous" "\n" \
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| 47 | " .section \"___ksymtab+" #name "\", \"a\"" "\n" \
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| 48 | __KSYM_ALIGN "\n" \
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| 49 | "__ksymtab_" #name ":" "\n" \
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| 50 | __KSYM_REF(sym) "\n" \
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| 51 | __KSYM_REF(__kstrtab_ ##name) "\n" \
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| 52 | __KSYM_REF(__kstrtabns_ ##name) "\n" \
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| 53 | " .previous" "\n" \
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| 54 | )
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| 55 |
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| 56 | #if defined(CONFIG_PARISC) && defined(CONFIG_64BIT)
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| 57 | #define KSYM_FUNC(name) P%name
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| 58 | #else
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| 59 | #define KSYM_FUNC(name) name
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| 60 | #endif
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| 61 |
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| 62 | #define KSYMTAB_FUNC(name, ns) __KSYMTAB(name, KSYM_FUNC(name), ns)
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| 63 | #define KSYMTAB_DATA(name, ns) __KSYMTAB(name, name, ns)
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| 64 |
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| 65 | #define SYMBOL_CRC(sym, crc) \
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| 66 | asm(" .section \"___kcrctab+" #sym "\",\"a\"" "\n" \
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| 67 | " .balign 4" "\n" \
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| 68 | "__crc_" #sym ":" "\n" \
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| 69 | " .long " #crc "\n" \
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| 70 | " .previous" "\n" \
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| 71 | )
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| 72 |
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| 73 | #define SYMBOL_FLAGS(sym, flags) \
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| 74 | asm(" .section \"___kflagstab+" #sym "\",\"a\"" "\n" \
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| 75 | "__flags_" #sym ":" "\n" \
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| 76 | " .byte " #flags "\n" \
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| 77 | " .previous" "\n" \
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| 78 | )
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| 79 |
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| 80 | #endif
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