1292925Sdim//===-- sanitizer_syscall_linux_aarch64.inc --------------------*- C++ -*-===// 2292925Sdim// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6292925Sdim// 7292925Sdim//===----------------------------------------------------------------------===// 8292925Sdim// 9292925Sdim// Implementations of internal_syscall and internal_iserror for Linux/aarch64. 10292925Sdim// 11292925Sdim//===----------------------------------------------------------------------===// 12292925Sdim 13292925Sdim#define SYSCALL(name) __NR_ ## name 14292925Sdim 15292925Sdimstatic uptr __internal_syscall(u64 nr) { 16292925Sdim register u64 x8 asm("x8") = nr; 17292925Sdim register u64 x0 asm("x0"); 18292925Sdim asm volatile("svc 0" 19292925Sdim : "=r"(x0) 20292925Sdim : "r"(x8) 21292925Sdim : "memory", "cc"); 22292925Sdim return x0; 23292925Sdim} 24292925Sdim#define __internal_syscall0(n) \ 25292925Sdim (__internal_syscall)(n) 26292925Sdim 27292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1) { 28292925Sdim register u64 x8 asm("x8") = nr; 29292925Sdim register u64 x0 asm("x0") = arg1; 30292925Sdim asm volatile("svc 0" 31292925Sdim : "=r"(x0) 32292925Sdim : "r"(x8), "0"(x0) 33292925Sdim : "memory", "cc"); 34292925Sdim return x0; 35292925Sdim} 36292925Sdim#define __internal_syscall1(n, a1) \ 37292925Sdim (__internal_syscall)(n, (u64)(a1)) 38292925Sdim 39292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1, long arg2) { 40292925Sdim register u64 x8 asm("x8") = nr; 41292925Sdim register u64 x0 asm("x0") = arg1; 42292925Sdim register u64 x1 asm("x1") = arg2; 43292925Sdim asm volatile("svc 0" 44292925Sdim : "=r"(x0) 45292925Sdim : "r"(x8), "0"(x0), "r"(x1) 46292925Sdim : "memory", "cc"); 47292925Sdim return x0; 48292925Sdim} 49292925Sdim#define __internal_syscall2(n, a1, a2) \ 50292925Sdim (__internal_syscall)(n, (u64)(a1), (long)(a2)) 51292925Sdim 52292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3) { 53292925Sdim register u64 x8 asm("x8") = nr; 54292925Sdim register u64 x0 asm("x0") = arg1; 55292925Sdim register u64 x1 asm("x1") = arg2; 56292925Sdim register u64 x2 asm("x2") = arg3; 57292925Sdim asm volatile("svc 0" 58292925Sdim : "=r"(x0) 59292925Sdim : "r"(x8), "0"(x0), "r"(x1), "r"(x2) 60292925Sdim : "memory", "cc"); 61292925Sdim return x0; 62292925Sdim} 63292925Sdim#define __internal_syscall3(n, a1, a2, a3) \ 64292925Sdim (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3)) 65292925Sdim 66292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 67292925Sdim u64 arg4) { 68292925Sdim register u64 x8 asm("x8") = nr; 69292925Sdim register u64 x0 asm("x0") = arg1; 70292925Sdim register u64 x1 asm("x1") = arg2; 71292925Sdim register u64 x2 asm("x2") = arg3; 72292925Sdim register u64 x3 asm("x3") = arg4; 73292925Sdim asm volatile("svc 0" 74292925Sdim : "=r"(x0) 75292925Sdim : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3) 76292925Sdim : "memory", "cc"); 77292925Sdim return x0; 78292925Sdim} 79292925Sdim#define __internal_syscall4(n, a1, a2, a3, a4) \ 80292925Sdim (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4)) 81292925Sdim 82292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 83292925Sdim u64 arg4, long arg5) { 84292925Sdim register u64 x8 asm("x8") = nr; 85292925Sdim register u64 x0 asm("x0") = arg1; 86292925Sdim register u64 x1 asm("x1") = arg2; 87292925Sdim register u64 x2 asm("x2") = arg3; 88292925Sdim register u64 x3 asm("x3") = arg4; 89292925Sdim register u64 x4 asm("x4") = arg5; 90292925Sdim asm volatile("svc 0" 91292925Sdim : "=r"(x0) 92292925Sdim : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4) 93292925Sdim : "memory", "cc"); 94292925Sdim return x0; 95292925Sdim} 96292925Sdim#define __internal_syscall5(n, a1, a2, a3, a4, a5) \ 97292925Sdim (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4), \ 98292925Sdim (u64)(a5)) 99292925Sdim 100292925Sdimstatic uptr __internal_syscall(u64 nr, u64 arg1, long arg2, long arg3, 101292925Sdim u64 arg4, long arg5, long arg6) { 102292925Sdim register u64 x8 asm("x8") = nr; 103292925Sdim register u64 x0 asm("x0") = arg1; 104292925Sdim register u64 x1 asm("x1") = arg2; 105292925Sdim register u64 x2 asm("x2") = arg3; 106292925Sdim register u64 x3 asm("x3") = arg4; 107292925Sdim register u64 x4 asm("x4") = arg5; 108292925Sdim register u64 x5 asm("x5") = arg6; 109292925Sdim asm volatile("svc 0" 110292925Sdim : "=r"(x0) 111292925Sdim : "r"(x8), "0"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x5) 112292925Sdim : "memory", "cc"); 113292925Sdim return x0; 114292925Sdim} 115292925Sdim#define __internal_syscall6(n, a1, a2, a3, a4, a5, a6) \ 116292925Sdim (__internal_syscall)(n, (u64)(a1), (long)(a2), (long)(a3), (long)(a4), \ 117292925Sdim (u64)(a5), (long)(a6)) 118292925Sdim 119292925Sdim#define __SYSCALL_NARGS_X(a1, a2, a3, a4, a5, a6, a7, a8, n, ...) n 120292925Sdim#define __SYSCALL_NARGS(...) \ 121292925Sdim __SYSCALL_NARGS_X(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0, ) 122292925Sdim#define __SYSCALL_CONCAT_X(a, b) a##b 123292925Sdim#define __SYSCALL_CONCAT(a, b) __SYSCALL_CONCAT_X(a, b) 124292925Sdim#define __SYSCALL_DISP(b, ...) \ 125292925Sdim __SYSCALL_CONCAT(b, __SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__) 126292925Sdim 127292925Sdim#define internal_syscall(...) __SYSCALL_DISP(__internal_syscall, __VA_ARGS__) 128292925Sdim 129292925Sdim// Helper function used to avoid cobbler errno. 130292925Sdimbool internal_iserror(uptr retval, int *rverrno) { 131292925Sdim if (retval >= (uptr)-4095) { 132292925Sdim if (rverrno) 133292925Sdim *rverrno = -retval; 134292925Sdim return true; 135292925Sdim } 136292925Sdim return false; 137292925Sdim} 138