1 #ifndef _LINUX_LINKAGE_H 2 #define _LINUX_LINKAGE_H 3 4 #include <linux/compiler.h> 5 #include <asm/linkage.h> 6 7 #define notrace __attribute__((no_instrument_function)) 8 9 #ifdef __cplusplus 10 #define CPP_ASMLINKAGE extern "C" 11 #else 12 #define CPP_ASMLINKAGE 13 #endif 14 15 #ifndef asmlinkage 16 #define asmlinkage CPP_ASMLINKAGE 17 #endif 18 19 #ifndef asmregparm 20 # define asmregparm 21 #endif 22 23 #define __page_aligned_data __section(.data.page_aligned) __aligned(PAGE_SIZE) 24 #define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE) 25 26 /* 27 * This is used by architectures to keep arguments on the stack 28 * untouched by the compiler by keeping them live until the end. 29 * The argument stack may be owned by the assembly-language 30 * caller, not the callee, and gcc doesn't always understand 31 * that. 32 * 33 * We have the return value, and a maximum of six arguments. 34 * 35 * This should always be followed by a "return ret" for the 36 * protection to work (ie no more work that the compiler might 37 * end up needing stack temporaries for). 38 */ 39 /* Assembly files may be compiled with -traditional .. */ 40 #ifndef __ASSEMBLY__ 41 #ifndef asmlinkage_protect 42 # define asmlinkage_protect(n, ret, args...) do { } while (0) 43 #endif 44 #endif 45 46 #ifndef __ALIGN 47 #define __ALIGN .align 4,0x90 48 #define __ALIGN_STR ".align 4,0x90" 49 #endif 50 51 #ifdef __ASSEMBLY__ 52 53 #define ALIGN __ALIGN 54 #define ALIGN_STR __ALIGN_STR 55 56 #ifndef ENTRY 57 #define ENTRY(name) \ 58 .globl name; \ 59 ALIGN; \ 60 name: 61 #endif 62 63 #ifndef WEAK 64 #define WEAK(name) \ 65 .weak name; \ 66 name: 67 #endif 68 69 #define KPROBE_ENTRY(name) \ 70 .pushsection .kprobes.text, "ax"; \ 71 ENTRY(name) 72 73 #define KPROBE_END(name) \ 74 END(name); \ 75 .popsection 76 77 #ifndef END 78 #define END(name) \ 79 .size name, .-name 80 #endif 81 82 /* If symbol 'name' is treated as a subroutine (gets called, and returns) 83 * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of 84 * static analysis tools such as stack depth analyzer. 85 */ 86 #ifndef ENDPROC 87 #define ENDPROC(name) \ 88 .type name, @function; \ 89 END(name) 90 #endif 91 92 #endif 93 94 #define NORET_TYPE /**/ 95 #define ATTRIB_NORET __attribute__((noreturn)) 96 #define NORET_AND noreturn, 97 98 #endif 99