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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | #ifndef _LINUX_LINKAGE_H #define _LINUX_LINKAGE_H #include <linux/compiler.h> #include <linux/stringify.h> #include <linux/export.h> #include <asm/linkage.h> /* Some toolchains use other characters (e.g. '`') to mark new line in macro */ #ifndef ASM_NL #define ASM_NL ; #endif #ifdef __cplusplus #define CPP_ASMLINKAGE extern "C" #else #define CPP_ASMLINKAGE #endif #ifndef asmlinkage #define asmlinkage CPP_ASMLINKAGE #endif #ifndef cond_syscall #define cond_syscall(x) asm( \ ".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \ ".set " VMLINUX_SYMBOL_STR(x) "," \ VMLINUX_SYMBOL_STR(sys_ni_syscall)) #endif #ifndef SYSCALL_ALIAS #define SYSCALL_ALIAS(alias, name) asm( \ ".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \ ".set " VMLINUX_SYMBOL_STR(alias) "," \ VMLINUX_SYMBOL_STR(name)) #endif #define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE) #define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE) /* * For assembly routines. * * Note when using these that you must specify the appropriate * alignment directives yourself */ #define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw" #define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw" /* * 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). */ /* Assembly files may be compiled with -traditional .. */ #ifndef __ASSEMBLY__ #ifndef asmlinkage_protect # define asmlinkage_protect(n, ret, args...) do { } while (0) #endif #endif #ifndef __ALIGN #define __ALIGN .align 4,0x90 #define __ALIGN_STR ".align 4,0x90" #endif #ifdef __ASSEMBLY__ #ifndef LINKER_SCRIPT #define ALIGN __ALIGN #define ALIGN_STR __ALIGN_STR #ifndef ENTRY #define ENTRY(name) \ .globl name ASM_NL \ ALIGN ASM_NL \ name: #endif #endif /* LINKER_SCRIPT */ #ifndef WEAK #define WEAK(name) \ .weak name ASM_NL \ name: #endif #ifndef END #define END(name) \ .size name, .-name #endif /* 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. */ #ifndef ENDPROC #define ENDPROC(name) \ .type name, @function ASM_NL \ END(name) #endif #endif #endif |