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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _LINUX_LINKAGE_H |
| 2 | #define _LINUX_LINKAGE_H |
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| 3 | |||
| 4 | #include |
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| 5 | #include |
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| 6 | #include |
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| 7 | #include |
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| 8 | |||
| 9 | /* Some toolchains use other characters (e.g. '`') to mark new line in macro */ |
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| 10 | #ifndef ASM_NL |
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| 11 | #define ASM_NL ; |
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| 12 | #endif |
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| 13 | |||
| 14 | #ifdef __cplusplus |
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| 15 | #define CPP_ASMLINKAGE extern "C" |
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| 16 | #else |
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| 17 | #define CPP_ASMLINKAGE |
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| 18 | #endif |
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| 19 | |||
| 20 | #ifndef asmlinkage |
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| 21 | #define asmlinkage CPP_ASMLINKAGE |
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| 22 | #endif |
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| 23 | |||
| 24 | #ifndef cond_syscall |
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| 25 | #define cond_syscall(x) asm( \ |
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| 26 | ".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \ |
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| 27 | ".set " VMLINUX_SYMBOL_STR(x) "," \ |
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| 28 | VMLINUX_SYMBOL_STR(sys_ni_syscall)) |
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| 29 | #endif |
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| 30 | |||
| 31 | #ifndef SYSCALL_ALIAS |
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| 32 | #define SYSCALL_ALIAS(alias, name) asm( \ |
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| 33 | ".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \ |
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| 34 | ".set " VMLINUX_SYMBOL_STR(alias) "," \ |
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| 35 | VMLINUX_SYMBOL_STR(name)) |
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| 36 | #endif |
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| 37 | |||
| 38 | #define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE) |
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| 39 | #define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE) |
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| 40 | |||
| 41 | /* |
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| 42 | * For assembly routines. |
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| 43 | * |
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| 44 | * Note when using these that you must specify the appropriate |
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| 45 | * alignment directives yourself |
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| 46 | */ |
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| 47 | #define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw" |
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| 48 | #define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw" |
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| 49 | |||
| 50 | /* |
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| 51 | * This is used by architectures to keep arguments on the stack |
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| 52 | * untouched by the compiler by keeping them live until the end. |
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| 53 | * The argument stack may be owned by the assembly-language |
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| 54 | * caller, not the callee, and gcc doesn't always understand |
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| 55 | * that. |
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| 56 | * |
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| 57 | * We have the return value, and a maximum of six arguments. |
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| 58 | * |
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| 59 | * This should always be followed by a "return ret" for the |
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| 60 | * protection to work (ie no more work that the compiler might |
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| 61 | * end up needing stack temporaries for). |
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| 62 | */ |
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| 63 | /* Assembly files may be compiled with -traditional .. */ |
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| 64 | #ifndef __ASSEMBLY__ |
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| 65 | #ifndef asmlinkage_protect |
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| 66 | # define asmlinkage_protect(n, ret, args...) do { } while (0) |
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| 67 | #endif |
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| 68 | #endif |
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| 69 | |||
| 70 | #ifndef __ALIGN |
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| 71 | #define __ALIGN .align 4,0x90 |
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| 72 | #define __ALIGN_STR ".align 4,0x90" |
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| 73 | #endif |
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| 74 | |||
| 75 | #ifdef __ASSEMBLY__ |
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| 76 | |||
| 77 | #ifndef LINKER_SCRIPT |
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| 78 | #define ALIGN __ALIGN |
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| 79 | #define ALIGN_STR __ALIGN_STR |
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| 80 | |||
| 81 | #ifndef ENTRY |
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| 82 | #define ENTRY(name) \ |
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| 83 | .globl name ASM_NL \ |
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| 84 | ALIGN ASM_NL \ |
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| 85 | name: |
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| 86 | #endif |
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| 87 | #endif /* LINKER_SCRIPT */ |
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| 88 | |||
| 89 | #ifndef WEAK |
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| 90 | #define WEAK(name) \ |
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| 91 | .weak name ASM_NL \ |
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| 92 | name: |
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| 93 | #endif |
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| 94 | |||
| 95 | #ifndef END |
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| 96 | #define END(name) \ |
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| 97 | .size name, .-name |
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| 98 | #endif |
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| 99 | |||
| 100 | /* If symbol 'name' is treated as a subroutine (gets called, and returns) |
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| 101 | * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of |
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| 102 | * static analysis tools such as stack depth analyzer. |
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| 103 | */ |
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| 104 | #ifndef ENDPROC |
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| 105 | #define ENDPROC(name) \ |
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| 106 | .type name, @function ASM_NL \ |
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| 107 | END(name) |
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| 108 | #endif |
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| 109 | |||
| 110 | #endif |
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| 111 | |||
| 112 | #endif |