From: Joseph Myers Date: Thu, 20 Feb 2014 17:50:31 +0000 (+0000) Subject: Fix __ASSUME_ACCEPT4 issues (bug 16609). X-Git-Tag: upstream/2.30~7848 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dd481ccffd926ea70b107a98a9f4eb00822070c4;p=external%2Fglibc.git Fix __ASSUME_ACCEPT4 issues (bug 16609). In , Aurelien noted issues with the definition of __ASSUME_ACCEPT4, which I discussed in more detail in ; these are now bug 16609. As previously noted, __ASSUME_ACCEPT4 is used in two ways: * In OS-independent code, to mean "accept4 can be assumed to work rather than fail with ENOSYS". It doesn't matter whether it's implemented with socketcall or a separate syscall. * In Linux-specific code, to mean "the socketcall multiplex syscall can be assumed to handle the accept4 operation. When used in Linux-specific code, it *never* refers to anything relating to the accept4 syscall, only to the socketcall multiplexer. This patch splits the macro into separate __ASSUME_ACCEPT4_SOCKETCALL, __ASSUME_ACCEPT4_SYSCALL and __ASSUME_ACCEPT4 to clarify the different cases involved. A macro __ASSUME_SOCKETCALL is added for convenience in writing logic relating to all socketcall architectures. In addition, to address the issue of architectures where socketcall support for accept4 was added before a separate syscall was added (and so the separate syscall should not be used unless known to be present or fallback to socketcall is available), a fourth macro __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL is added to indicate that the syscall became available at the same time as socketcall support. This is then used in the relevant places in a conditional determining whether to undefine __NR_accept4 (the simple approach to avoiding the syscall's presence causing problems; I didn't try to implement runtime fallback from the syscall to socketcall). Architecture-specific note: alpha defined __ASSUME_ACCEPT4 for 2.6.33 and later, but actually the syscall was added for alpha in 3.2, so this patch uses the correct condition for __ASSUME_ACCEPT4_SYSCALL there. Tested x86_64, including that disassembly of the installed shared libraries is unchanged by this patch. [BZ #16609] * sysdeps/unix/sysv/linux/kernel-features.h [__i386__ || __powerpc__ || __s390__ || __sh__ || __sparc__] (__ASSUME_SOCKETCALL): Define. [__LINUX_KERNEL_VERSION && __ASSUME_SOCKETCALL] (__ASSUME_ACCEPT4_SOCKETCALL): Likewise. [(__LINUX_KERNEL_VERSION >= 0x02061c && (__x86_64__ || __sparc__)) || (__LINUX_KERNEL_VERSION >= 0x020625 && (__powerpc__ || __sh__))] (__ASSUME_ACCEPT4_SYSCALL): Likewise. [__sparc__] (__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL): Likewise. [__ASSUME_ACCEPT4_SOCKETCALL || __ASSUME_ACCEPT4_SYSCALL] (__ASSUME_ACCEPT4): Define instead of using previous [__LINUX_KERNEL_VERSION >= 0x02061c && (__i386__ || __x86_64__ || __powerpc__ || __sparc__ || __s390__)] condition. * sysdeps/unix/sysv/linux/aarch64/kernel-features.h (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. * sysdeps/unix/sysv/linux/accept4.c [__ASSUME_SOCKETCALL && !__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL && !__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine. [!__ASSUME_ACCEPT4]: Change condition to [!__ASSUME_ACCEPT4_SOCKETCALL]. * sysdeps/unix/sysv/linux/alpha/kernel-features.h (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. Correct condition to [__LINUX_KERNEL_VERSION >= 0x030200]. * sysdeps/unix/sysv/linux/arm/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020624] (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. * sysdeps/unix/sysv/linux/i386/accept4.S [__ASSUME_ACCEPT4]: Change conditions to [__ASSUME_ACCEPT4_SOCKETCALL]. * sysdeps/unix/sysv/linux/ia64/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x030300] (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. * sysdeps/unix/sysv/linux/internal_accept4.S [__ASSUME_SOCKETCALL && !__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL && !__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine. [__ASSUME_ACCEPT4]: Change condition to [__ASSUME_ACCEPT4_SOCKETCALL]. * sysdeps/unix/sysv/linux/m68k/kernel-features.h (__ASSUME_SOCKETCALL): Define. [__LINUX_KERNEL_VERSION >= 0x02061c] (__ASSUME_ACCEPT4): Remove. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h (__ASSUME_SOCKETCALL): Define. (__ASSUME_ACCEPT4): Remove. [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_ACCEPT4_SYSCALL): Define. * sysdeps/unix/sysv/linux/mips/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x02061f] (__ASSUME_ACCEPT4_SYSCALL): Likewise. * sysdeps/unix/sysv/linux/tile/kernel-features.h (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. * sysdeps/unix/sysv/linux/hppa/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020622] (__ASSUME_ACCEPT4_SYSCALL): Define. --- diff --git a/ChangeLog b/ChangeLog index 52d5256..a7b2fd9 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,56 @@ 2014-02-20 Joseph Myers + [BZ #16609] + * sysdeps/unix/sysv/linux/kernel-features.h [__i386__ || + __powerpc__ || __s390__ || __sh__ || __sparc__] + (__ASSUME_SOCKETCALL): Define. + [__LINUX_KERNEL_VERSION && __ASSUME_SOCKETCALL] + (__ASSUME_ACCEPT4_SOCKETCALL): Likewise. + [(__LINUX_KERNEL_VERSION >= 0x02061c && (__x86_64__ || __sparc__)) + || (__LINUX_KERNEL_VERSION >= 0x020625 && (__powerpc__ || + __sh__))] (__ASSUME_ACCEPT4_SYSCALL): Likewise. + [__sparc__] (__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL): Likewise. + [__ASSUME_ACCEPT4_SOCKETCALL || __ASSUME_ACCEPT4_SYSCALL] + (__ASSUME_ACCEPT4): Define instead of using previous + [__LINUX_KERNEL_VERSION >= 0x02061c && (__i386__ || __x86_64__ || + __powerpc__ || __sparc__ || __s390__)] condition. + * sysdeps/unix/sysv/linux/aarch64/kernel-features.h + (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. + * sysdeps/unix/sysv/linux/accept4.c [__ASSUME_SOCKETCALL && + !__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL && + !__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine. + [!__ASSUME_ACCEPT4]: Change condition to + [!__ASSUME_ACCEPT4_SOCKETCALL]. + * sysdeps/unix/sysv/linux/alpha/kernel-features.h + (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. Correct + condition to [__LINUX_KERNEL_VERSION >= 0x030200]. + * sysdeps/unix/sysv/linux/arm/kernel-features.h + [__LINUX_KERNEL_VERSION >= 0x020624] (__ASSUME_ACCEPT4): Change to + __ASSUME_ACCEPT4_SYSCALL. + * sysdeps/unix/sysv/linux/i386/accept4.S [__ASSUME_ACCEPT4]: + Change conditions to [__ASSUME_ACCEPT4_SOCKETCALL]. + * sysdeps/unix/sysv/linux/ia64/kernel-features.h + [__LINUX_KERNEL_VERSION >= 0x030300] (__ASSUME_ACCEPT4): Change to + __ASSUME_ACCEPT4_SYSCALL. + * sysdeps/unix/sysv/linux/internal_accept4.S [__ASSUME_SOCKETCALL + && !__ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL && + !__ASSUME_ACCEPT4_SYSCALL] (__NR_accept4): Undefine. + [__ASSUME_ACCEPT4]: Change condition to + [__ASSUME_ACCEPT4_SOCKETCALL]. + * sysdeps/unix/sysv/linux/m68k/kernel-features.h + (__ASSUME_SOCKETCALL): Define. + [__LINUX_KERNEL_VERSION >= 0x02061c] (__ASSUME_ACCEPT4): Remove. + * sysdeps/unix/sysv/linux/microblaze/kernel-features.h + (__ASSUME_SOCKETCALL): Define. + (__ASSUME_ACCEPT4): Remove. + [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_ACCEPT4_SYSCALL): + Define. + * sysdeps/unix/sysv/linux/mips/kernel-features.h + [__LINUX_KERNEL_VERSION >= 0x02061f] (__ASSUME_ACCEPT4_SYSCALL): + Likewise. + * sysdeps/unix/sysv/linux/tile/kernel-features.h + (__ASSUME_ACCEPT4): Change to __ASSUME_ACCEPT4_SYSCALL. + * sysdeps/unix/sysv/linux/arm/bits/hwcap.h (HWCAP_ARM_VFPD32): New macro. (HWCAP_ARM_LPAE): Likewise. diff --git a/NEWS b/NEWS index 6de1d45..3813155 100644 --- a/NEWS +++ b/NEWS @@ -9,7 +9,7 @@ Version 2.20 * The following bugs are resolved with this release: - 15894, 16447, 16545, 16574. + 15894, 16447, 16545, 16574, 16609. * The am33 port, which had not worked for several years, has been removed from ports. diff --git a/ports/ChangeLog.hppa b/ports/ChangeLog.hppa index c98364b..bd415aa 100644 --- a/ports/ChangeLog.hppa +++ b/ports/ChangeLog.hppa @@ -1,3 +1,10 @@ +2014-02-20 Joseph Myers + + [BZ #16609] + * sysdeps/unix/sysv/linux/hppa/kernel-features.h + [__LINUX_KERNEL_VERSION >= 0x020622] (__ASSUME_ACCEPT4_SYSCALL): + Define. + 2014-02-12 Joseph Myers * sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_BSD]: Change diff --git a/ports/sysdeps/unix/sysv/linux/hppa/kernel-features.h b/ports/sysdeps/unix/sysv/linux/hppa/kernel-features.h index e050c27..b8abd08 100644 --- a/ports/sysdeps/unix/sysv/linux/hppa/kernel-features.h +++ b/ports/sysdeps/unix/sysv/linux/hppa/kernel-features.h @@ -30,4 +30,9 @@ /* PA-RISC 2.6.9 kernels had the first LWS CAS support */ #define __ASSUME_LWS_CAS 1 +/* Support for the accept4 syscall was added in 2.6.34. */ +#if __LINUX_KERNEL_VERSION >= 0x020622 +# define __ASSUME_ACCEPT4_SYSCALL 1 +#endif + #include_next diff --git a/sysdeps/unix/sysv/linux/aarch64/kernel-features.h b/sysdeps/unix/sysv/linux/aarch64/kernel-features.h index c736eb9..222b61c 100644 --- a/sysdeps/unix/sysv/linux/aarch64/kernel-features.h +++ b/sysdeps/unix/sysv/linux/aarch64/kernel-features.h @@ -24,7 +24,7 @@ /* AArch64 support starts with 3.7.0, guaranteeing many kernel features. */ -#define __ASSUME_ACCEPT4 1 +#define __ASSUME_ACCEPT4_SYSCALL 1 #define __ASSUME_DUP3 1 #define __ASSUME_EVENTFD2 1 #define __ASSUME_IN_NONBLOCK 1 diff --git a/sysdeps/unix/sysv/linux/accept4.c b/sysdeps/unix/sysv/linux/accept4.c index 019e96b..a017224 100644 --- a/sysdeps/unix/sysv/linux/accept4.c +++ b/sysdeps/unix/sysv/linux/accept4.c @@ -24,6 +24,14 @@ #include #include +/* Do not use the accept4 syscall on socketcall architectures unless + it was added at the same time as the socketcall support or can be + assumed to be present. */ +#if defined __ASSUME_SOCKETCALL \ + && !defined __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL \ + && !defined __ASSUME_ACCEPT4_SYSCALL +# undef __NR_accept4 +#endif #ifdef __NR_accept4 int @@ -42,7 +50,7 @@ accept4 (int fd, __SOCKADDR_ARG addr, socklen_t *addr_len, int flags) return result; } #elif defined __NR_socketcall -# ifndef __ASSUME_ACCEPT4 +# ifndef __ASSUME_ACCEPT4_SOCKETCALL extern int __internal_accept4 (int fd, __SOCKADDR_ARG addr, socklen_t *addr_len, int flags) attribute_hidden; @@ -83,7 +91,8 @@ accept4 (int fd, __SOCKADDR_ARG addr, socklen_t *addr_len, int flags) return -1; } # else -/* When __ASSUME_ACCEPT4 accept4 is defined in internal_accept4.S. */ +/* When __ASSUME_ACCEPT4_SOCKETCALL accept4 is defined in + internal_accept4.S. */ # endif #else int diff --git a/sysdeps/unix/sysv/linux/alpha/kernel-features.h b/sysdeps/unix/sysv/linux/alpha/kernel-features.h index 7c38854..8cceb34 100644 --- a/sysdeps/unix/sysv/linux/alpha/kernel-features.h +++ b/sysdeps/unix/sysv/linux/alpha/kernel-features.h @@ -42,9 +42,9 @@ # define __ASSUME_SIGNALFD4 1 #endif -/* Support for accept4 was added for alpha after 2.6.33-rc1. */ -#if __LINUX_KERNEL_VERSION >= 0x020621 -# define __ASSUME_ACCEPT4 1 +/* Support for accept4 was added for alpha in 3.2. */ +#if __LINUX_KERNEL_VERSION >= 0x030200 +# define __ASSUME_ACCEPT4_SYSCALL 1 #endif #include_next diff --git a/sysdeps/unix/sysv/linux/arm/kernel-features.h b/sysdeps/unix/sysv/linux/arm/kernel-features.h index 9d7ef87..304f88d 100644 --- a/sysdeps/unix/sysv/linux/arm/kernel-features.h +++ b/sysdeps/unix/sysv/linux/arm/kernel-features.h @@ -33,7 +33,7 @@ /* Support for the accept4 syscall was added in 2.6.36. */ #if __LINUX_KERNEL_VERSION >= 0x020624 -# define __ASSUME_ACCEPT4 1 +# define __ASSUME_ACCEPT4_SYSCALL 1 #endif #include_next diff --git a/sysdeps/unix/sysv/linux/i386/accept4.S b/sysdeps/unix/sysv/linux/i386/accept4.S index cdce27b..2021399 100644 --- a/sysdeps/unix/sysv/linux/i386/accept4.S +++ b/sysdeps/unix/sysv/linux/i386/accept4.S @@ -23,7 +23,7 @@ #define EINVAL 22 #define ENOSYS 38 -#ifdef __ASSUME_ACCEPT4 +#ifdef __ASSUME_ACCEPT4_SOCKETCALL # define errlabel SYSCALL_ERROR_LABEL #else # define errlabel .Lerr @@ -114,7 +114,7 @@ ENTRY (__libc_accept4) ret #endif -#ifndef __ASSUME_ACCEPT4 +#ifndef __ASSUME_ACCEPT4_SOCKETCALL /* The kernel returns -EINVAL for unknown socket operations. We need to convert that error to an ENOSYS error. */ .Lerr: cmpl $-EINVAL, %eax diff --git a/sysdeps/unix/sysv/linux/ia64/kernel-features.h b/sysdeps/unix/sysv/linux/ia64/kernel-features.h index 340f679..5c7c4eb 100644 --- a/sysdeps/unix/sysv/linux/ia64/kernel-features.h +++ b/sysdeps/unix/sysv/linux/ia64/kernel-features.h @@ -49,7 +49,7 @@ /* Support for the accept4 syscall was added in 3.3. */ #if __LINUX_KERNEL_VERSION >= 0x030300 -# define __ASSUME_ACCEPT4 1 +# define __ASSUME_ACCEPT4_SYSCALL 1 #endif #include_next diff --git a/sysdeps/unix/sysv/linux/internal_accept4.S b/sysdeps/unix/sysv/linux/internal_accept4.S index ffc5536..f0c61b5 100644 --- a/sysdeps/unix/sysv/linux/internal_accept4.S +++ b/sysdeps/unix/sysv/linux/internal_accept4.S @@ -1,8 +1,18 @@ #include #include + +/* Do not use the accept4 syscall on socketcall architectures unless + it was added at the same time as the socketcall support or can be + assumed to be present. */ +#if defined __ASSUME_SOCKETCALL \ + && !defined __ASSUME_ACCEPT4_SYSCALL_WITH_SOCKETCALL \ + && !defined __ASSUME_ACCEPT4_SYSCALL +# undef __NR_accept4 +#endif + #if !defined __NR_accept4 && defined __NR_socketcall # define socket accept4 -# ifdef __ASSUME_ACCEPT4 +# ifdef __ASSUME_ACCEPT4_SOCKETCALL # define __socket accept4 # else # define __socket __internal_accept4 diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 784f4dd..b6d7714 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 diff --git a/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/sysdeps/unix/sysv/linux/m68k/kernel-features.h index 3b05e96..cb8915f 100644 --- a/sysdeps/unix/sysv/linux/m68k/kernel-features.h +++ b/sysdeps/unix/sysv/linux/m68k/kernel-features.h @@ -17,6 +17,9 @@ License along with the GNU C Library. If not, see . */ +/* m68k uses socketcall. */ +#define __ASSUME_SOCKETCALL 1 + /* Many syscalls were added in 2.6.10 for m68k. */ #define __ASSUME_UTIMES 1 @@ -35,11 +38,6 @@ # define __ASSUME_DUP3 1 #endif -/* Support for the accept4 syscall was added in 2.6.28. */ -#if __LINUX_KERNEL_VERSION >= 0x02061c -# define __ASSUME_ACCEPT4 1 -#endif - #include_next /* These syscalls were added only in 3.0 for m68k. */ diff --git a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h index dcc0ac9..413b4a0 100644 --- a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h +++ b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h @@ -16,6 +16,9 @@ . */ +/* MicroBlaze uses socketcall. */ +#define __ASSUME_SOCKETCALL 1 + /* MicroBlaze glibc support starts with 2.6.30, guaranteeing many kernel features. */ #define __ASSUME_UTIMES 1 #define __ASSUME_O_CLOEXEC 1 @@ -24,7 +27,11 @@ #define __ASSUME_PIPE2 1 #define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1 -#define __ASSUME_ACCEPT4 1 #define __ASSUME_DUP3 1 +/* Support for the accept4 syscall was added in 2.6.33. */ +#if __LINUX_KERNEL_VERSION >= 0x020621 +# define __ASSUME_ACCEPT4_SYSCALL 1 +#endif + #include_next diff --git a/sysdeps/unix/sysv/linux/mips/kernel-features.h b/sysdeps/unix/sysv/linux/mips/kernel-features.h index 1c83ee5..94deaf9 100644 --- a/sysdeps/unix/sysv/linux/mips/kernel-features.h +++ b/sysdeps/unix/sysv/linux/mips/kernel-features.h @@ -31,6 +31,11 @@ # define __ASSUME_SIGNALFD4 1 #endif +/* Support for the accept4 syscall was added in 2.6.31. */ +#if __LINUX_KERNEL_VERSION >= 0x02061f +# define __ASSUME_ACCEPT4_SYSCALL 1 +#endif + #include_next /* The n32 syscall ABI did not have a getdents64 syscall until diff --git a/sysdeps/unix/sysv/linux/tile/kernel-features.h b/sysdeps/unix/sysv/linux/tile/kernel-features.h index 5b81128..e339e7a 100644 --- a/sysdeps/unix/sysv/linux/tile/kernel-features.h +++ b/sysdeps/unix/sysv/linux/tile/kernel-features.h @@ -25,7 +25,7 @@ #define __ASSUME_PIPE2 1 #define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1 -#define __ASSUME_ACCEPT4 1 +#define __ASSUME_ACCEPT4_SYSCALL 1 #define __ASSUME_DUP3 1 #include_next