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1/* Set flags signalling availability of kernel features based on given
2 kernel version number. SPARC version.
3 Copyright (C) 1999-2019 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#include_next <kernel-features.h>
21
22/* 32-bit SPARC kernels do not support
23 futex_atomic_cmpxchg_inatomic. */
24#if !defined __arch64__ && !defined __sparc_v9__
25# undef __ASSUME_SET_ROBUST_LIST
26#endif
27
28/* These syscalls were added for 32-bit in 4.4 (but present for 64-bit
29 in all supported kernel versions); the architecture-independent
30 kernel-features.h assumes some of them to be present by default.
31 getpeername and getsockname syscalls were also added for 32-bit in
32 4.4, but only for 32-bit kernels, not in the compat syscall table
33 for 64-bit kernels. */
34#if !defined __arch64__ && __LINUX_KERNEL_VERSION < 0x040400
35# undef __ASSUME_SENDMSG_SYSCALL
36# undef __ASSUME_RECVMSG_SYSCALL
37# undef __ASSUME_ACCEPT_SYSCALL
38# undef __ASSUME_CONNECT_SYSCALL
39# undef __ASSUME_RECVFROM_SYSCALL
40# undef __ASSUME_SENDTO_SYSCALL
41#else
42# define __ASSUME_SOCKET_SYSCALL 1
43# define __ASSUME_SOCKETPAIR_SYSCALL 1
44# define __ASSUME_GETSOCKOPT_SYSCALL 1
45# define __ASSUME_SHUTDOWN_SYSCALL 1
46#endif
47
48/* These syscalls were added for both 32-bit and 64-bit in 4.4. */
49#if __LINUX_KERNEL_VERSION >= 0x040400
50# define __ASSUME_BIND_SYSCALL 1
51# define __ASSUME_LISTEN_SYSCALL 1
52# define __ASSUME_SETSOCKOPT_SYSCALL 1
53#endif
54
55#ifdef __arch64__
56/* sparc64 defines __NR_pause, however it is not supported (ENOSYS).
57 Undefine so pause.c can use a correct alternative. */
58# undef __NR_pause
59#endif
60
61/* sparc only supports ipc syscall. */
62#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
63
64/* Support for the renameat2 syscall was added in 3.16. */
65#if __LINUX_KERNEL_VERSION < 0x031000
66# undef __ASSUME_RENAMEAT2
67#endif
68
69/* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it
70 has the same ABI as if it did, implemented by sparc-specific code
71 (sparc_do_fork).
72
73 It also has a unique return value convention:
74
75 Parent --> %o0 == child's pid, %o1 == 0
76 Child --> %o0 == parent's pid, %o1 == 1
77
78 Which required a special macro to correct issue the syscall
79 (INLINE_CLONE_SYSCALL). */
80#undef __ASSUME_CLONE_DEFAULT
81#define __ASSUME_CLONE_BACKWARDS 1
82

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