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| 1 | /* Set flags signalling availability of kernel features based on given |
|---|---|
| 2 | kernel version number. SPARC version. |
| 3 | Copyright (C) 1999-2022 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 |
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