1 //===-- sanitizer_syscall_linux_aarch64.inc --------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Implementations of internal_syscall and internal_iserror for Linux/aarch64. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #define SYSCALL(name) __NR_ ## name 15 16 static uptr __internal_syscall(u64 nr) { 17 register u64 x8 asm("x8") = nr; 18 register u64 x0 asm("x0"); 19 asm volatile("svc 0" 20 : "=r"(x0) 21 : "r"(x8) 22 : "memory", "cc"); 23 return x0; 24 } 25 #define __internal_syscall0(n) \ 26 (__internal_syscall)(n) 27 28 static uptr __internal_syscall(u64 nr, u64 arg1) { 29 register u64 x8 asm("x8") = nr; 30 register u64 x0 asm("x0") = arg1; 31 asm volatile("svc 0" 32 : "=r"(x0) 33 : "r"(x8), "0"(x0) 34 : "memory", "cc"); 35 return x0; 36 } 37 #define __internal_syscall1(n, a1) \ 38 (__internal_syscall)(n, (u64)(a1)) 39 40 static uptr __internal_syscall(u64 nr, u64 arg1, long arg2) { 41 register u64 x8 asm("x8") = nr; 42 register u64 x0 asm("x0") = arg1; 43 register u64 x1 asm("x1") = arg2; 44 asm volatile("svc 0" 45 : "=r"(x0) 46 : "r"(x8), "0"(x0), "r"(x1) 47 : "memory", "cc"); 48 return x0; 49 } 50 #define __internal_syscall2(n, a1, a2) \ 51 (__internal_syscall)(n, (u64)(a1), (long)(a2)) 52 53 static uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3) { 54 register u64 x8 asm("x8") = nr; 55 register u64 x0 asm("x0") = arg1; 56 register u64 x1 asm("x1") = arg2; 57 register u64 x2 asm("x2") = arg3; 58 asm volatile("svc 0" 59 : "=r"(x0) 60 : "r"(x8), "0"(x0), "r"(x1), "r"(x2) 61 : "memory", "cc"); 62 return x0; 63 } 64 #define __internal_syscall3(n, a1, a2, a3) \ 65 (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3)) 66 67 static uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 68 u64 arg4) { 69 register u64 x8 asm("x8") = nr; 70 register u64 x0 asm("x0") = arg1; 71 register u64 x1 asm("x1") = arg2; 72 register u64 x2 asm("x2") = arg3; 73 register u64 x3 asm("x3") = arg4; 74 asm volatile("svc 0" 75 : "=r"(x0) 76 : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3) 77 : "memory", "cc"); 78 return x0; 79 } 80 #define __internal_syscall4(n, a1, a2, a3, a4) \ 81 (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4)) 82 83 static uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 84 u64 arg4, long arg5) { 85 register u64 x8 asm("x8") = nr; 86 register u64 x0 asm("x0") = arg1; 87 register u64 x1 asm("x1") = arg2; 88 register u64 x2 asm("x2") = arg3; 89 register u64 x3 asm("x3") = arg4; 90 register u64 x4 asm("x4") = arg5; 91 asm volatile("svc 0" 92 : "=r"(x0) 93 : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4) 94 : "memory", "cc"); 95 return x0; 96 } 97 #define __internal_syscall5(n, a1, a2, a3, a4, a5) \ 98 (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4), \ 99 (u64)(a5)) 100 101 static uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 102 u64 arg4, long arg5, long arg6) { 103 register u64 x8 asm("x8") = nr; 104 register u64 x0 asm("x0") = arg1; 105 register u64 x1 asm("x1") = arg2; 106 register u64 x2 asm("x2") = arg3; 107 register u64 x3 asm("x3") = arg4; 108 register u64 x4 asm("x4") = arg5; 109 register u64 x5 asm("x5") = arg6; 110 asm volatile("svc 0" 111 : "=r"(x0) 112 : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x5) 113 : "memory", "cc"); 114 return x0; 115 } 116 #define __internal_syscall6(n, a1, a2, a3, a4, a5, a6) \ 117 (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4), \ 118 (u64)(a5), (long)(a6)) 119 120 #define __SYSCALL_NARGS_X(a1, a2, a3, a4, a5, a6, a7, a8, n, ...) n 121 #define __SYSCALL_NARGS(...) \ 122 __SYSCALL_NARGS_X(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0, ) 123 #define __SYSCALL_CONCAT_X(a, b) a##b 124 #define __SYSCALL_CONCAT(a, b) __SYSCALL_CONCAT_X(a, b) 125 #define __SYSCALL_DISP(b, ...) \ 126 __SYSCALL_CONCAT(b, __SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__) 127 128 #define internal_syscall(...) __SYSCALL_DISP(__internal_syscall, __VA_ARGS__) 129 130 // Helper function used to avoid cobbler errno. 131 bool internal_iserror(uptr retval, int *rverrno) { 132 if (retval >= (uptr)-4095) { 133 if (rverrno) 134 *rverrno = -retval; 135 return true; 136 } 137 return false; 138 } 139
