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6d7e8eda | 1 | /* Copyright (C) 2012-2023 Free Software Foundation, Inc. |
bbb3154b L |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
bbb3154b L |
17 | |
18 | #ifndef _LINUX_X32_SYSDEP_H | |
19 | #define _LINUX_X32_SYSDEP_H 1 | |
20 | ||
21 | /* There is some commonality. */ | |
22 | #include <sysdeps/unix/sysv/linux/x86_64/sysdep.h> | |
23 | #include <sysdeps/x86_64/x32/sysdep.h> | |
24 | ||
d8a7d103 L |
25 | /* How to pass the off{64}_t argument on p{readv,writev}{64}. */ |
26 | #undef LO_HI_LONG | |
27 | #define LO_HI_LONG(val) (val) | |
28 | ||
2ad5d084 L |
29 | #ifdef __ASSEMBLER__ |
30 | /* Zero-extend 32-bit unsigned long int arguments to 64 bits. */ | |
31 | # undef ZERO_EXTEND_1 | |
32 | # define ZERO_EXTEND_1 movl %edi, %edi; | |
33 | # undef ZERO_EXTEND_2 | |
34 | # define ZERO_EXTEND_2 movl %esi, %esi; | |
35 | # undef ZERO_EXTEND_3 | |
36 | # define ZERO_EXTEND_3 movl %edx, %edx; | |
37 | # if SYSCALL_ULONG_ARG_1 == 4 || SYSCALL_ULONG_ARG_2 == 4 | |
38 | # undef DOARGS_4 | |
39 | # define DOARGS_4 movl %ecx, %r10d; | |
40 | # else | |
41 | # undef ZERO_EXTEND_4 | |
42 | # define ZERO_EXTEND_4 movl %r10d, %r10d; | |
43 | # endif | |
44 | # undef ZERO_EXTEND_5 | |
45 | # define ZERO_EXTEND_5 movl %r8d, %r8d; | |
46 | # undef ZERO_EXTEND_6 | |
47 | # define ZERO_EXTEND_6 movl %r9d, %r9d; | |
48 | #else /* !__ASSEMBLER__ */ | |
df76ff3a L |
49 | # undef ARGIFY |
50 | /* Enforce zero-extension for pointers and array system call arguments. | |
51 | For integer types, extend to int64_t (the full register) using a | |
52 | regular cast, resulting in zero or sign extension based on the | |
53 | signedness of the original type. */ | |
54 | # define ARGIFY(X) \ | |
55 | ({ \ | |
56 | _Pragma ("GCC diagnostic push"); \ | |
57 | _Pragma ("GCC diagnostic ignored \"-Wpointer-to-int-cast\""); \ | |
58 | (__builtin_classify_type (X) == 5 \ | |
59 | ? (uintptr_t) (X) : (int64_t) (X)); \ | |
60 | _Pragma ("GCC diagnostic pop"); \ | |
61 | }) | |
62 | #endif /* __ASSEMBLER__ */ | |
63 | ||
bbb3154b | 64 | #endif /* linux/x86_64/x32/sysdep.h */ |