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include/linux/linkage.h
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#ifndef _LINUX_LINKAGE_H #define _LINUX_LINKAGE_H |
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#include <linux/compiler.h> |
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#include <linux/stringify.h> |
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#include <linux/export.h> |
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#include <asm/linkage.h> |
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/* Some toolchains use other characters (e.g. '`') to mark new line in macro */ #ifndef ASM_NL #define ASM_NL ; #endif |
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#ifdef __cplusplus |
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#define CPP_ASMLINKAGE extern "C" |
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#else |
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#define CPP_ASMLINKAGE |
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#endif #ifndef asmlinkage #define asmlinkage CPP_ASMLINKAGE #endif |
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#ifndef cond_syscall |
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#define cond_syscall(x) asm( \ ".weak " VMLINUX_SYMBOL_STR(x) " \t" \ ".set " VMLINUX_SYMBOL_STR(x) "," \ VMLINUX_SYMBOL_STR(sys_ni_syscall)) |
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#endif #ifndef SYSCALL_ALIAS |
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#define SYSCALL_ALIAS(alias, name) asm( \ ".globl " VMLINUX_SYMBOL_STR(alias) " \t" \ ".set " VMLINUX_SYMBOL_STR(alias) "," \ VMLINUX_SYMBOL_STR(name)) |
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#endif |
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#define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE) |
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#define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE) |
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/* |
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* For assembly routines. * * Note when using these that you must specify the appropriate * alignment directives yourself */ |
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#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw" |
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#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw" |
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/* |
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* 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). */ |
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/* Assembly files may be compiled with -traditional .. */ #ifndef __ASSEMBLY__ |
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#ifndef asmlinkage_protect # define asmlinkage_protect(n, ret, args...) do { } while (0) |
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#endif |
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#endif |
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#ifndef __ALIGN #define __ALIGN .align 4,0x90 #define __ALIGN_STR ".align 4,0x90" #endif #ifdef __ASSEMBLY__ |
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#ifndef LINKER_SCRIPT |
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#define ALIGN __ALIGN #define ALIGN_STR __ALIGN_STR |
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#ifndef ENTRY |
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#define ENTRY(name) \ |
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.globl name ASM_NL \ ALIGN ASM_NL \ name: |
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#endif |
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#endif /* LINKER_SCRIPT */ |
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#ifndef WEAK #define WEAK(name) \ |
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.weak name ASM_NL \ |
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name: #endif |
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#ifndef END #define END(name) \ |
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.size name, .-name |
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#endif |
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/* 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. */ |
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#ifndef ENDPROC #define ENDPROC(name) \ |
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.type name, @function ASM_NL \ END(name) |
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#endif |
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#endif |
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#endif |