projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_LINKAGE_H |
| 2 | #define _ASM_X86_LINKAGE_H | |
| 82f74e71 | 3 | |
| 78a9909a IM |
4 | #undef notrace |
| 5 | #define notrace __attribute__((no_instrument_function)) | |
| 6 | ||
| 82f74e71 HH |
7 | #ifdef CONFIG_X86_64 |
| 8 | #define __ALIGN .p2align 4,,15 | |
| 9 | #define __ALIGN_STR ".p2align 4,,15" | |
| 10 | #endif | |
| 11 | ||
| 96a388de | 12 | #ifdef CONFIG_X86_32 |
| 82f74e71 | 13 | #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0))) |
| d50efc6c IM |
14 | /* |
| 15 | * For 32-bit UML - mark functions implemented in assembly that use | |
| 16 | * regparm input parameters: | |
| 17 | */ | |
| 18 | #define asmregparm __attribute__((regparm(3))) | |
| 54a01510 | 19 | |
| d10d89ec LT |
20 | /* |
| 21 | * Make sure the compiler doesn't do anything stupid with the | |
| 22 | * arguments on the stack - they are owned by the *caller*, not | |
| 23 | * the callee. This just fools gcc into not spilling into them, | |
| 24 | * and keeps it from doing tailcall recursion and/or using the | |
| 25 | * stack slots for temporaries, since they are live and "used" | |
| 26 | * all the way to the end of the function. | |
| 27 | * | |
| 28 | * NOTE! On x86-64, all the arguments are in registers, so this | |
| 29 | * only matters on a 32-bit kernel. | |
| 30 | */ | |
| 54a01510 RM |
31 | #define asmlinkage_protect(n, ret, args...) \ |
| 32 | __asmlinkage_protect##n(ret, ##args) | |
| 33 | #define __asmlinkage_protect_n(ret, args...) \ | |
| 34 | __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args) | |
| 35 | #define __asmlinkage_protect0(ret) \ | |
| 36 | __asmlinkage_protect_n(ret) | |
| 37 | #define __asmlinkage_protect1(ret, arg1) \ | |
| 38 | __asmlinkage_protect_n(ret, "g" (arg1)) | |
| 39 | #define __asmlinkage_protect2(ret, arg1, arg2) \ | |
| 40 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2)) | |
| 41 | #define __asmlinkage_protect3(ret, arg1, arg2, arg3) \ | |
| 42 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3)) | |
| 43 | #define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \ | |
| 44 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | |
| 45 | "g" (arg4)) | |
| 46 | #define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \ | |
| 47 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | |
| 48 | "g" (arg4), "g" (arg5)) | |
| 49 | #define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \ | |
| 50 | __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \ | |
| 51 | "g" (arg4), "g" (arg5), "g" (arg6)) | |
| 52 | ||
| 82f74e71 HH |
53 | #endif |
| 54 | ||
| 55 | #ifdef CONFIG_X86_ALIGNMENT_16 | |
| 56 | #define __ALIGN .align 16,0x90 | |
| 57 | #define __ALIGN_STR ".align 16,0x90" | |
| 58 | #endif | |
| 59 | ||
| 3b6c52b5 CG |
60 | /* |
| 61 | * to check ENTRY_X86/END_X86 and | |
| 62 | * KPROBE_ENTRY_X86/KPROBE_END_X86 | |
| 63 | * unbalanced-missed-mixed appearance | |
| 64 | */ | |
| 65 | #define __set_entry_x86 .set ENTRY_X86_IN, 0 | |
| 66 | #define __unset_entry_x86 .set ENTRY_X86_IN, 1 | |
| 67 | #define __set_kprobe_x86 .set KPROBE_X86_IN, 0 | |
| 68 | #define __unset_kprobe_x86 .set KPROBE_X86_IN, 1 | |
| 69 | ||
| 70 | #define __macro_err_x86 .error "ENTRY_X86/KPROBE_X86 unbalanced,missed,mixed" | |
| 71 | ||
| 72 | #define __check_entry_x86 \ | |
| 73 | .ifdef ENTRY_X86_IN; \ | |
| 74 | .ifeq ENTRY_X86_IN; \ | |
| 75 | __macro_err_x86; \ | |
| 76 | .abort; \ | |
| 77 | .endif; \ | |
| 78 | .endif | |
| 79 | ||
| 80 | #define __check_kprobe_x86 \ | |
| 81 | .ifdef KPROBE_X86_IN; \ | |
| 82 | .ifeq KPROBE_X86_IN; \ | |
| 83 | __macro_err_x86; \ | |
| 84 | .abort; \ | |
| 85 | .endif; \ | |
| 86 | .endif | |
| 87 | ||
| 88 | #define __check_entry_kprobe_x86 \ | |
| 89 | __check_entry_x86; \ | |
| 90 | __check_kprobe_x86 | |
| 91 | ||
| 92 | #define ENTRY_KPROBE_FINAL_X86 __check_entry_kprobe_x86 | |
| 93 | ||
| 94 | #define ENTRY_X86(name) \ | |
| 95 | __check_entry_kprobe_x86; \ | |
| 96 | __set_entry_x86; \ | |
| 97 | .globl name; \ | |
| 98 | __ALIGN; \ | |
| 99 | name: | |
| 100 | ||
| 101 | #define END_X86(name) \ | |
| 102 | __unset_entry_x86; \ | |
| 103 | __check_entry_kprobe_x86; \ | |
| 104 | .size name, .-name | |
| 105 | ||
| 106 | #define KPROBE_ENTRY_X86(name) \ | |
| 107 | __check_entry_kprobe_x86; \ | |
| 108 | __set_kprobe_x86; \ | |
| 109 | .pushsection .kprobes.text, "ax"; \ | |
| 110 | .globl name; \ | |
| 111 | __ALIGN; \ | |
| 112 | name: | |
| 113 | ||
| 114 | #define KPROBE_END_X86(name) \ | |
| 115 | __unset_kprobe_x86; \ | |
| 116 | __check_entry_kprobe_x86; \ | |
| 117 | .size name, .-name; \ | |
| 118 | .popsection | |
| 119 | ||
| 1965aae3 | 120 | #endif /* _ASM_X86_LINKAGE_H */ |
| 82f74e71 | 121 |