1 //===---------- inline implementation of x86_64 syscalls ----------* 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 #ifndef LLVM_LIBC_SRC_SUPPORT_OSUTIL_LINUX_X86_64_SYSCALL_H
10 #define LLVM_LIBC_SRC_SUPPORT_OSUTIL_LINUX_X86_64_SYSCALL_H
11
12 #include "src/__support/common.h"
13
14 #define SYSCALL_CLOBBER_LIST "rcx", "r11", "memory"
15
16 namespace __llvm_libc {
17
syscall(long __number)18 __attribute__((always_inline)) inline long syscall(long __number) {
19 long retcode;
20 LIBC_INLINE_ASM("syscall"
21 : "=a"(retcode)
22 : "a"(__number)
23 : SYSCALL_CLOBBER_LIST);
24 return retcode;
25 }
26
syscall(long __number,long __arg1)27 __attribute__((always_inline)) inline long syscall(long __number, long __arg1) {
28 long retcode;
29 LIBC_INLINE_ASM("syscall"
30 : "=a"(retcode)
31 : "a"(__number), "D"(__arg1)
32 : SYSCALL_CLOBBER_LIST);
33 return retcode;
34 }
35
syscall(long __number,long __arg1,long __arg2)36 __attribute__((always_inline)) inline long syscall(long __number, long __arg1,
37 long __arg2) {
38 long retcode;
39 LIBC_INLINE_ASM("syscall"
40 : "=a"(retcode)
41 : "a"(__number), "D"(__arg1), "S"(__arg2)
42 : SYSCALL_CLOBBER_LIST);
43 return retcode;
44 }
45
syscall(long __number,long __arg1,long __arg2,long __arg3)46 __attribute__((always_inline)) inline long syscall(long __number, long __arg1,
47 long __arg2, long __arg3) {
48 long retcode;
49 LIBC_INLINE_ASM("syscall"
50 : "=a"(retcode)
51 : "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3)
52 : SYSCALL_CLOBBER_LIST);
53 return retcode;
54 }
55
56 __attribute__((always_inline)) inline long
syscall(long __number,long __arg1,long __arg2,long __arg3,long __arg4)57 syscall(long __number, long __arg1, long __arg2, long __arg3, long __arg4) {
58 long retcode;
59 register long r10 __asm__("r10") = __arg4;
60 LIBC_INLINE_ASM("syscall"
61 : "=a"(retcode)
62 : "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
63 "r"(r10)
64 : SYSCALL_CLOBBER_LIST);
65 return retcode;
66 }
67
syscall(long __number,long __arg1,long __arg2,long __arg3,long __arg4,long __arg5)68 __attribute__((always_inline)) inline long syscall(long __number, long __arg1,
69 long __arg2, long __arg3,
70 long __arg4, long __arg5) {
71 long retcode;
72 register long r10 __asm__("r10") = __arg4;
73 register long r8 __asm__("r8") = __arg5;
74 LIBC_INLINE_ASM("syscall"
75 : "=a"(retcode)
76 : "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
77 "r"(r10), "r"(r8)
78 : SYSCALL_CLOBBER_LIST);
79 return retcode;
80 }
81
syscall(long __number,long __arg1,long __arg2,long __arg3,long __arg4,long __arg5,long __arg6)82 __attribute__((always_inline)) inline long syscall(long __number, long __arg1,
83 long __arg2, long __arg3,
84 long __arg4, long __arg5,
85 long __arg6) {
86 long retcode;
87 register long r10 __asm__("r10") = __arg4;
88 register long r8 __asm__("r8") = __arg5;
89 register long r9 __asm__("r9") = __arg6;
90 LIBC_INLINE_ASM("syscall"
91 : "=a"(retcode)
92 : "a"(__number), "D"(__arg1), "S"(__arg2), "d"(__arg3),
93 "r"(r10), "r"(r8), "r"(r9)
94 : SYSCALL_CLOBBER_LIST);
95 return retcode;
96 }
97
98 #undef SYSCALL_CLOBBER_LIST
99
100 } // namespace __llvm_libc
101
102 #endif // LLVM_LIBC_SRC_SUPPORT_OSUTIL_LINUX_X86_64_SYSCALL_H
103