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