1 /* Set flags signalling availability of kernel features based on given 2 kernel version number. SPARC version. 3 Copyright (C) 1999-2022 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 <https://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 # undef __ASSUME_GETSOCKOPT_SYSCALL 42 # undef __ASSUME_SETSOCKOPT_SYSCALL 43 #else 44 # define __ASSUME_SOCKET_SYSCALL 1 45 # define __ASSUME_SOCKETPAIR_SYSCALL 1 46 # define __ASSUME_SHUTDOWN_SYSCALL 1 47 #endif 48 49 /* These syscalls were added for both 32-bit and 64-bit in 4.4. */ 50 #if __LINUX_KERNEL_VERSION >= 0x040400 51 # define __ASSUME_BIND_SYSCALL 1 52 # define __ASSUME_LISTEN_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 before 5.1. */ 62 #if __LINUX_KERNEL_VERSION < 0x050100 63 # undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS 64 # if !defined __arch64__ 65 # undef __ASSUME_SYSVIPC_DEFAULT_IPC_64 66 # endif 67 #endif 68 69 /* Support for the renameat2 syscall was added in 3.16. */ 70 #if __LINUX_KERNEL_VERSION < 0x031000 71 # undef __ASSUME_RENAMEAT2 72 #endif 73 74 /* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it 75 has the same ABI as if it did, implemented by sparc-specific code 76 (sparc_do_fork). 77 78 It also has a unique return value convention: 79 80 Parent --> %o0 == child's pid, %o1 == 0 81 Child --> %o0 == parent's pid, %o1 == 1 82 83 Which required a special macro to correct issue the syscall 84 (INLINE_CLONE_SYSCALL). */ 85 #undef __ASSUME_CLONE_DEFAULT 86 #define __ASSUME_CLONE_BACKWARDS 1 87