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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Implementations of internal_syscall and internal_iserror for Linux/hexagon.
10//
11//===----------------------------------------------------------------------===//
12
13#define SYSCALL(name) __NR_##name
14
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, ...) n
114#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##b
117#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}