diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/kernel-features.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-features.h | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 784f4dd491..b6d7714073 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -40,6 +40,18 @@ /* The sendfile syscall was introduced in 2.2.0. */ #define __ASSUME_SENDFILE 1 +/* Some architectures use the socketcall multiplexer for some or all + socket-related operations, via a socket.S file in glibc, instead of + separate syscalls. __ASSUME_SOCKETCALL is defined for such + architectures. */ +#if defined __i386__ \ + || defined __powerpc__ \ + || defined __s390__ \ + || defined __sh__ \ + || defined __sparc__ +# define __ASSUME_SOCKETCALL 1 +#endif + /* Linux 2.3.39 introduced IPC64. Except for powerpc. Linux 2.4.0 on PPC introduced a correct IPC64. But PowerPC64 does not support a separate 64-bit syscall, already 64-bit. */ @@ -164,10 +176,34 @@ # define __ASSUME_DUP3 1 #endif -/* Support for the accept4 syscall was added in 2.6.28. */ -#if __LINUX_KERNEL_VERSION >= 0x02061c \ - && (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ - || defined __sparc__ || defined __s390__) +/* Support for accept4 functionality was added in 2.6.28, but for some + architectures using a separate syscall rather than socketcall that + syscall was only added later, and some architectures first had + socketcall support then a separate syscall. Define + __ASSUME_ACCEPT4_SOCKETCALL if glibc uses socketcall on this + architecture and accept4 is available through socketcall, + __ASSUME_ACCEPT4_SYSCALL if it is available through a separate + syscall, __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL if it became + available through a separate syscall at the same time as through + socketcall, and __ASSUME_ACCEPT4 if the accept4 function is known + to work. */ +#if __LINUX_KERNEL_VERSION >= 0x02061c && defined __ASSUME_SOCKETCALL +# define __ASSUME_ACCEPT4_SOCKETCALL 1 +#endif + +/* The accept4 syscall was added for x86_64 and SPARC in 2.6.28, and + for PowerPC and SH in 2.6.37. */ +#if (__LINUX_KERNEL_VERSION >= 0x02061c \ + && (defined __x86_64__ || defined __sparc__)) \ + || (__LINUX_KERNEL_VERSION >= 0x020625 \ + && (defined __powerpc__ || defined __sh__)) +# define __ASSUME_ACCEPT4_SYSCALL 1 +#endif +#ifdef __sparc__ +# define __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL 1 +#endif + +#if defined __ASSUME_ACCEPT4_SOCKETCALL || defined __ASSUME_ACCEPT4_SYSCALL # define __ASSUME_ACCEPT4 1 #endif |