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daea71c2e4
Looking at kernel-features.h files, I saw that SPARC was missing full information on when it gained separate socket syscalls. This patch adds such information to the SPARC kernel-features.h. It also corrects what appear to be bugs in the existing code (that would cause syscalls to be assumed to be present when not actually present). Various __ASSUME_* macros, defined by default, were not undefined for 32-bit despite those syscalls only being added for 32-bit in Linux 4.4. Some syscalls were used in the SPARC64 syscalls.list but only added in 4.4; this was harmless before the __NR_* macros were defined at all, but once the macros were defined it means a build with post-4.4 headers would assume the syscalls to be present regardless of --enable-kernel version. Then, various __ASSUME_* macros were previously not defined in cases where they could be defined (this part of the patch is just an optimization, not a bug fix). Note the observation in a comment in the patch that even the latest Linux kernel for SPARC does not have getpeername and getsockname syscalls in the compat syscall table for 32-bit binaries on 64-bit kernels (so glibc can't assume those syscalls to be present for 32-bit at all, although the 32-bit syscall table gained them in 4.4). Tested (compilation only) for SPARC with build-many-glibcs.py. [BZ #23848] * sysdeps/unix/sysv/linux/sparc/kernel-features.h [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_SENDMSG_SYSCALL): Undefine. [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_RECVMSG_SYSCALL): Likewise. [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_SENDTO_SYSCALL): Likewise. [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_ACCEPT_SYSCALL): Undefine under this condition, not just [!__arch64__]. [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_CONNECT_SYSCALL): Likewise. [!__arch64__ && __LINUX_KERNEL_VERSION < 0x040400] (__ASSUME_RECVFROM_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_BIND_SYSCALL): Define. [__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_LISTEN_SYSCALL): Likewise. [__LINUX_KERNEL_VERSION >= 0x040400] (__ASSUME_SETSOCKOPT_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (bind): Remove. (listen): Likewise. (setsockopt): Likewise.
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/* Set flags signalling availability of kernel features based on given
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kernel version number. SPARC version.
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Copyright (C) 1999-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* SPARC uses socketcall. */
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#define __ASSUME_SOCKETCALL 1
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#include_next <kernel-features.h>
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/* 32-bit SPARC kernels do not support
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futex_atomic_cmpxchg_inatomic. */
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#if !defined __arch64__ && !defined __sparc_v9__
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# undef __ASSUME_SET_ROBUST_LIST
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#endif
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/* These syscalls were added for 32-bit in 4.4 (but present for 64-bit
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in all supported kernel versions); the architecture-independent
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kernel-features.h assumes some of them to be present by default.
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getpeername and getsockname syscalls were also added for 32-bit in
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4.4, but only for 32-bit kernels, not in the compat syscall table
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for 64-bit kernels. */
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#if !defined __arch64__ && __LINUX_KERNEL_VERSION < 0x040400
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# undef __ASSUME_SENDMSG_SYSCALL
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# undef __ASSUME_RECVMSG_SYSCALL
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# undef __ASSUME_ACCEPT_SYSCALL
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# undef __ASSUME_CONNECT_SYSCALL
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# undef __ASSUME_RECVFROM_SYSCALL
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# undef __ASSUME_SENDTO_SYSCALL
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#else
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# define __ASSUME_SOCKET_SYSCALL 1
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# define __ASSUME_SOCKETPAIR_SYSCALL 1
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# define __ASSUME_GETSOCKOPT_SYSCALL 1
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# define __ASSUME_SHUTDOWN_SYSCALL 1
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#endif
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/* These syscalls were added for both 32-bit and 64-bit in 4.4. */
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#if __LINUX_KERNEL_VERSION >= 0x040400
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# define __ASSUME_BIND_SYSCALL 1
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# define __ASSUME_LISTEN_SYSCALL 1
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# define __ASSUME_SETSOCKOPT_SYSCALL 1
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#endif
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#ifdef __arch64__
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/* sparc64 defines __NR_pause, however it is not supported (ENOSYS).
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Undefine so pause.c can use a correct alternative. */
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# undef __NR_pause
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#endif
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/* sparc only supports ipc syscall. */
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#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
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/* Support for the renameat2 syscall was added in 3.16. */
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#if __LINUX_KERNEL_VERSION < 0x031000
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# undef __ASSUME_RENAMEAT2
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#endif
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/* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it
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has the same ABI as if it did, implemented by sparc-specific code
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(sparc_do_fork).
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It also has a unique return value convention:
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Parent --> %o0 == child's pid, %o1 == 0
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Child --> %o0 == parent's pid, %o1 == 1
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Which required a special macro to correct issue the syscall
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(INLINE_CLONE_SYSCALL). */
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#undef __ASSUME_CLONE_DEFAULT
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#define __ASSUME_CLONE_BACKWARDS 1
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