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1//===-- sanitizer_syscall_linux_hexagon.inc ---------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// Implementations of internal_syscall and internal_iserror for Linux/hexagon.10//11//===----------------------------------------------------------------------===//12 13#define SYSCALL(name) __NR_##name14 15#define __internal_syscall_LL_E(x) \16 ((union { \17 long long ll; \18 long l[2]; \19 }){.ll = x}) \20 .l[0], \21 ((union { \22 long long ll; \23 long l[2]; \24 }){.ll = x}) \25 .l[1]26#define __internal_syscall_LL_O(x) 0, __SYSCALL_LL_E((x))27 28#define __asm_syscall(...) \29 do { \30 __asm__ __volatile__("trap0(#1)" : "=r"(r0) : __VA_ARGS__ : "memory"); \31 return r0; \32 } while (0)33 34#define __internal_syscall0(n) (__internal_syscall)(n)35 36static uptr __internal_syscall(long n) {37 register u32 r6 __asm__("r6") = n;38 register u32 r0 __asm__("r0");39 __asm_syscall("r"(r6));40}41 42#define __internal_syscall1(n, a1) (__internal_syscall)(n, (long)(a1))43 44static uptr __internal_syscall(long n, long a) {45 register u32 r6 __asm__("r6") = n;46 register u32 r0 __asm__("r0") = a;47 __asm_syscall("r"(r6), "0"(r0));48}49 50#define __internal_syscall2(n, a1, a2) \51 (__internal_syscall)(n, (long)(a1), (long)(a2))52 53static uptr __internal_syscall(long n, long a, long b) {54 register u32 r6 __asm__("r6") = n;55 register u32 r0 __asm__("r0") = a;56 register u32 r1 __asm__("r1") = b;57 __asm_syscall("r"(r6), "0"(r0), "r"(r1));58}59 60#define __internal_syscall3(n, a1, a2, a3) \61 (__internal_syscall)(n, (long)(a1), (long)(a2), (long)(a3))62 63static uptr __internal_syscall(long n, long a, long b, long c) {64 register u32 r6 __asm__("r6") = n;65 register u32 r0 __asm__("r0") = a;66 register u32 r1 __asm__("r1") = b;67 register u32 r2 __asm__("r2") = c;68 __asm_syscall("r"(r6), "0"(r0), "r"(r1), "r"(r2));69}70 71#define __internal_syscall4(n, a1, a2, a3, a4) \72 (__internal_syscall)(n, (long)(a1), (long)(a2), (long)(a3), (long)(a4))73 74static uptr __internal_syscall(long n, long a, long b, long c, long d) {75 register u32 r6 __asm__("r6") = n;76 register u32 r0 __asm__("r0") = a;77 register u32 r1 __asm__("r1") = b;78 register u32 r2 __asm__("r2") = c;79 register u32 r3 __asm__("r3") = d;80 __asm_syscall("r"(r6), "0"(r0), "r"(r1), "r"(r2), "r"(r3));81}82 83#define __internal_syscall5(n, a1, a2, a3, a4, a5) \84 (__internal_syscall)(n, (long)(a1), (long)(a2), (long)(a3), (long)(a4), \85 (long)(a5))86 87static uptr __internal_syscall(long n, long a, long b, long c, long d, long e) {88 register u32 r6 __asm__("r6") = n;89 register u32 r0 __asm__("r0") = a;90 register u32 r1 __asm__("r1") = b;91 register u32 r2 __asm__("r2") = c;92 register u32 r3 __asm__("r3") = d;93 register u32 r4 __asm__("r4") = e;94 __asm_syscall("r"(r6), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4));95}96 97#define __internal_syscall6(n, a1, a2, a3, a4, a5, a6) \98 (__internal_syscall)(n, (long)(a1), (long)(a2), (long)(a3), (long)(a4), \99 (long)(a5), (long)(a6))100 101static uptr __internal_syscall(long n, long a, long b, long c, long d, long e,102 long f) {103 register u32 r6 __asm__("r6") = n;104 register u32 r0 __asm__("r0") = a;105 register u32 r1 __asm__("r1") = b;106 register u32 r2 __asm__("r2") = c;107 register u32 r3 __asm__("r3") = d;108 register u32 r4 __asm__("r4") = e;109 register u32 r5 __asm__("r5") = f;110 __asm_syscall("r"(r6), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5));111}112 113#define __SYSCALL_NARGS_X(a1, a2, a3, a4, a5, a6, a7, a8, n, ...) n114#define __SYSCALL_NARGS(...) \115 __SYSCALL_NARGS_X(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0, )116#define __SYSCALL_CONCAT_X(a, b) a##b117#define __SYSCALL_CONCAT(a, b) __SYSCALL_CONCAT_X(a, b)118#define __SYSCALL_DISP(b, ...) \119 __SYSCALL_CONCAT(b, __SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)120 121#define internal_syscall(...) __SYSCALL_DISP(__internal_syscall, __VA_ARGS__)122 123// Helper function used to avoid clobbering of errno.124bool internal_iserror(uptr retval, int *rverrno) {125 if (retval >= (uptr)-4095) {126 if (rverrno)127 *rverrno = -retval;128 return true;129 }130 return false;131}132