diff options
Diffstat (limited to 'libc/sysdeps/linux/common')
26 files changed, 1179 insertions, 198 deletions
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in index ec889ca0d..45c70baf6 100644 --- a/libc/sysdeps/linux/common/Makefile.in +++ b/libc/sysdeps/linux/common/Makefile.in @@ -34,6 +34,17 @@ CSRC := $(filter-out capget.c capset.c inotify.c ioperm.c iopl.c madvise.c \ sync_file_range.c sysctl.c sysinfo.c timerfd.c uselib.c vhangup.c,$(CSRC)) endif +ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) +CSRC := $(filter-out fork.c getpid.c raise.c open.c close.c read.c write.c, $(CSRC)) +ifeq ($(TARGET_ARCH),arm) +CSRC := $(filter-out vfork.c, $(CSRC)) +else ifeq ($(TARGET_ARCH),x86_64) +#do nothing +else +CSRC := $(filter-out waitpid.c, $(CSRC)) +endif +endif + ifneq ($(UCLIBC_BSD_SPECIFIC),y) # we need these internally: getdomainname.c CSRC := $(filter-out mincore.c setdomainname.c,$(CSRC)) @@ -75,6 +86,18 @@ ifneq ($(UCLIBC_SV4_DEPRECATED),y) CSRC := $(filter-out ustat.c,$(CSRC)) endif +ifeq ($(TARGET_ARCH),sh) +CSRC := $(filter-out longjmp.c vfork.c,$(CSRC)) +endif + +ifeq ($(TARGET_ARCH),sparc) +CSRC := $(filter-out vfork.c,$(CSRC)) +endif + +ifeq ($(TARGET_ARCH),i386) +CSRC := $(filter-out vfork.c,$(CSRC)) +endif + # fails for some reason ifneq ($(strip $(ARCH_OBJS)),) CSRC := $(filter-out $(notdir $(ARCH_OBJS:.o=.c)) $(ARCH_OBJ_FILTEROUT),$(CSRC)) diff --git a/libc/sysdeps/linux/common/__rt_sigtimedwait.c b/libc/sysdeps/linux/common/__rt_sigtimedwait.c index f9ec0eabf..554c6b9cb 100644 --- a/libc/sysdeps/linux/common/__rt_sigtimedwait.c +++ b/libc/sysdeps/linux/common/__rt_sigtimedwait.c @@ -2,44 +2,97 @@ /* * __rt_sigtimedwait() for uClibc * - * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> + * Copyright (C) 2006 by Steven Hill <sjhill@realitydiluted.com> + * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org> * - * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + * GNU Library General Public License (LGPL) version 2 or later. */ #include <sys/syscall.h> #include <signal.h> -#define __need_NULL -#include <stddef.h> +#include <string.h> +libc_hidden_proto(memcpy) #ifdef __NR_rt_sigtimedwait -#define __NR___rt_sigtimedwait __NR_rt_sigtimedwait -static _syscall4(int, __rt_sigtimedwait, const sigset_t *, set, siginfo_t *, info, - const struct timespec *, timeout, size_t, setsize) +#include <string.h> +libc_hidden_proto(memcpy) -int sigwaitinfo(const sigset_t * set, siginfo_t * info) +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include <sysdep-cancel.h> + +static int do_sigtimedwait(const sigset_t *set, siginfo_t *info, + const struct timespec *timeout) { - return __rt_sigtimedwait(set, info, NULL, _NSIG / 8); +# ifdef SIGCANCEL + sigset_t tmpset; + + if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + /* Create a temporary mask without the bit for SIGCANCEL set. */ + // We are not copying more than we have to. + memcpy (&tmpset, set, _NSIG / 8); + __sigdelset (&tmpset, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset (&tmpset, SIGSETXID); +# endif + set = &tmpset; + } +# endif + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set, info, + timeout, _NSIG / 8); + + /* The kernel generates a SI_TKILL code in si_code in case tkill is + used. tkill is transparently used in raise(). Since having + SI_TKILL as a code is useful in general we fold the results + here. */ + if (result != -1 && info != NULL && info->si_code == SI_TKILL) + info->si_code = SI_USER; + + return result; } -int sigtimedwait(const sigset_t * set, siginfo_t * info, - const struct timespec *timeout) +/* Return any pending signal or wait for one for the given time. */ +int __sigtimedwait(const sigset_t *set, siginfo_t *info, + const struct timespec *timeout) { - return __rt_sigtimedwait(set, info, timeout, _NSIG / 8); + if(SINGLE_THREAD_P) + return do_sigtimedwait(set, info, timeout); + + int oldtype = LIBC_CANCEL_ASYNC(); + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = do_sigtimedwait(set, info, timeout); + + LIBC_CANCEL_RESET(oldtype); + + return result; } -#else -int sigwaitinfo(const sigset_t * set, siginfo_t * info) +# else +# define __need_NULL +# include <stddef.h> +# define __NR___rt_sigtimedwait __NR_rt_sigtimedwait +static _syscall4(int, __rt_sigtimedwait, const sigset_t *, set, + siginfo_t *, info, const struct timespec *, timeout, + size_t, setsize); + +int attribute_hidden __sigtimedwait(const sigset_t * set, siginfo_t * info, + const struct timespec *timeout) { - if (set == NULL) - __set_errno(EINVAL); - else - __set_errno(ENOSYS); - return -1; + return __rt_sigtimedwait(set, info, timeout, _NSIG / 8); } - -int sigtimedwait(const sigset_t * set, siginfo_t * info, - const struct timespec *timeout) +# endif /* !__UCLIBC_HAS_THREADS_NATIVE__ */ +#else +int attribute_hidden __sigtimedwait(const sigset_t * set, siginfo_t * info, + const struct timespec *timeout) { if (set == NULL) __set_errno(EINVAL); @@ -48,5 +101,4 @@ int sigtimedwait(const sigset_t * set, siginfo_t * info, return -1; } #endif -libc_hidden_def(sigwaitinfo) -libc_hidden_def(sigtimedwait) +weak_alias(__sigtimedwait,sigtimedwait) diff --git a/libc/sysdeps/linux/common/__rt_sigwaitinfo.c b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c new file mode 100644 index 000000000..c8953bfbc --- /dev/null +++ b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c @@ -0,0 +1,102 @@ +/* vi: set sw=4 ts=4: */ +/* + * __rt_sigwaitinfo() for uClibc + * + * Copyright (C) 2006 by Steven Hill <sjhill@realitydiluted.com> + * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org> + * + * GNU Library General Public License (LGPL) version 2 or later. + */ + +#include <sys/syscall.h> +#include <signal.h> +#include <string.h> + +libc_hidden_proto(memcpy) + +#ifdef __NR_rt_sigtimedwait + +#include <string.h> + +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include <sysdep-cancel.h> + +static int do_sigwaitinfo(const sigset_t *set, siginfo_t *info) +{ +# ifdef SIGCANCEL + sigset_t tmpset; + + if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + /* Create a temporary mask without the bit for SIGCANCEL set. */ + // We are not copying more than we have to. + memcpy (&tmpset, set, _NSIG / 8); + __sigdelset (&tmpset, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset (&tmpset, SIGSETXID); +# endif + set = &tmpset; + } +# endif + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set, info, + NULL, _NSIG / 8); + + /* The kernel generates a SI_TKILL code in si_code in case tkill is + used. tkill is transparently used in raise(). Since having + SI_TKILL as a code is useful in general we fold the results + here. */ + if (result != -1 && info != NULL && info->si_code == SI_TKILL) + info->si_code = SI_USER; + + return result; +} + +/* Return any pending signal or wait for one for the given time. */ +int __sigwaitinfo(const sigset_t *set, siginfo_t *info) +{ + if(SINGLE_THREAD_P) + return do_sigwaitinfo(set, info); + + int oldtype = LIBC_CANCEL_ASYNC(); + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = do_sigwaitinfo(set, info); + + LIBC_CANCEL_RESET(oldtype); + + return result; +} +# else +# define __need_NULL +# include <stddef.h> +# define __NR___rt_sigwaitinfo __NR_rt_sigtimedwait +static _syscall4(int, __rt_sigwaitinfo, const sigset_t *, set, + siginfo_t *, info, const struct timespec *, timeout, + size_t, setsize); + +int attribute_hidden __sigwaitinfo(const sigset_t * set, siginfo_t * info) +{ + return __rt_sigwaitinfo(set, info, NULL, _NSIG / 8); +} +# endif +#else +int attribute_hidden __sigwaitinfo(const sigset_t * set, siginfo_t * info) +{ + if (set == NULL) + __set_errno(EINVAL); + else + __set_errno(ENOSYS); + return -1; +} +#endif +libc_hidden_proto(sigwaitinfo) +weak_alias (__sigwaitinfo, sigwaitinfo) +libc_hidden_weak(sigwaitinfo) diff --git a/libc/sysdeps/linux/common/__syscall_fcntl.c b/libc/sysdeps/linux/common/__syscall_fcntl.c index 355b22b00..4e3bc23df 100644 --- a/libc/sysdeps/linux/common/__syscall_fcntl.c +++ b/libc/sysdeps/linux/common/__syscall_fcntl.c @@ -2,6 +2,7 @@ /* * __syscall_fcntl() for uClibc * + * Copyright (C) 2006 Steven J. Hill <sjhill@realitydiluted.com> * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. @@ -9,42 +10,83 @@ #include <sys/syscall.h> #include <stdarg.h> +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +#include <sysdep-cancel.h> /* Must come before <fcntl.h>. */ +#endif #include <fcntl.h> #include <bits/wordsize.h> -#define __NR___syscall_fcntl __NR_fcntl -static __always_inline -_syscall3(int, __syscall_fcntl, int, fd, int, cmd, long, arg) +extern __typeof(fcntl) __libc_fcntl; +libc_hidden_proto(__libc_fcntl) -int fcntl(int fd, int cmd, ...) +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +int __fcntl_nocancel (int fd, int cmd, ...) { - long arg; - va_list list; + va_list ap; + void *arg; - va_start(list, cmd); - arg = va_arg(list, long); - va_end(list); + va_start (ap, cmd); + arg = va_arg (ap, void *); + va_end (ap); -#if __WORDSIZE == 32 +# if __WORDSIZE == 32 if (cmd == F_GETLK64 || cmd == F_SETLK64 || cmd == F_SETLKW64) { -#if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64 - return fcntl64(fd, cmd, arg); -#else +# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64 + return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg); +# else __set_errno(ENOSYS); return -1; -#endif +# endif } +# endif + return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); +} #endif - return (__syscall_fcntl(fd, cmd, arg)); -} -#ifndef __LINUXTHREADS_OLD__ -libc_hidden_def(fcntl) +int __libc_fcntl (int fd, int cmd, ...) +{ + va_list ap; + void *arg; + + va_start (ap, cmd); + arg = va_arg (ap, void *); + va_end (ap); + +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ + if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64)) +# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64 + return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg); +# else + return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); +# endif + + int oldtype = LIBC_CANCEL_ASYNC (); + +# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64 + int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg); +# else + int result = INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); +# endif + + LIBC_CANCEL_RESET (oldtype); + + return result; #else -libc_hidden_weak(fcntl) -strong_alias(fcntl,__libc_fcntl) +# if __WORDSIZE == 32 + if (cmd == F_GETLK64 || cmd == F_SETLK64 || cmd == F_SETLKW64) { +# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64 + return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg); +# else + __set_errno(ENOSYS); + return -1; +# endif + } +# endif + return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg); #endif +} +libc_hidden_def(__libc_fcntl) -#if ! defined __NR_fcntl64 && defined __UCLIBC_HAS_LFS__ -strong_alias(fcntl,fcntl64) -#endif +libc_hidden_proto(fcntl) +weak_alias(__libc_fcntl,fcntl) +libc_hidden_weak(fcntl) diff --git a/libc/sysdeps/linux/common/__syscall_rt_sigaction.c b/libc/sysdeps/linux/common/__syscall_rt_sigaction.c index b4b007d02..006b38a2a 100644 --- a/libc/sysdeps/linux/common/__syscall_rt_sigaction.c +++ b/libc/sysdeps/linux/common/__syscall_rt_sigaction.c @@ -12,7 +12,9 @@ #ifdef __NR_rt_sigaction #include <signal.h> -int __syscall_rt_sigaction (int __signum, const struct sigaction *__act, struct sigaction *__oldact, size_t __size) attribute_hidden; +int __syscall_rt_sigaction (int __signum, const struct sigaction *__act, + struct sigaction *__oldact, size_t __size); + #define __NR___syscall_rt_sigaction __NR_rt_sigaction _syscall4(int, __syscall_rt_sigaction, int, signum, const struct sigaction *, act, struct sigaction *, oldact, diff --git a/libc/sysdeps/linux/common/_exit.c b/libc/sysdeps/linux/common/_exit.c index 6cece0878..51117d109 100644 --- a/libc/sysdeps/linux/common/_exit.c +++ b/libc/sysdeps/linux/common/_exit.c @@ -12,13 +12,23 @@ #include <unistd.h> #include <sys/types.h> #include <sys/syscall.h> +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +#include <sysdep.h> +#endif void attribute_noreturn _exit(int status) { /* The loop is added only to keep gcc happy. */ while(1) + { +#ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# ifdef __NR_exit_group + INLINE_SYSCALL(exit_group, 1, status); +# endif +#endif INLINE_SYSCALL(exit, 1, status); + } } libc_hidden_def(_exit) weak_alias(_exit,_Exit) diff --git a/libc/sysdeps/linux/common/bits/kernel-features.h b/libc/sysdeps/linux/common/bits/kernel-features.h index 88297349a..923341b35 100644 --- a/libc/sysdeps/linux/common/bits/kernel-features.h +++ b/libc/sysdeps/linux/common/bits/kernel-features.h @@ -26,23 +26,126 @@ #endif #include <linux/version.h> -#define __LINUX_KERNEL_VERSION LINUX_VERSION_CODE +#define __LINUX_KERNEL_VERSION LINUX_VERSION_CODE + +/* We assume for __LINUX_KERNEL_VERSION the same encoding used in + linux/version.h. I.e., the major, minor, and subminor all get a + byte with the major number being in the highest byte. This means + we can do numeric comparisons. + + In the following we will define certain symbols depending on + whether the describes kernel feature is available in the kernel + version given by __LINUX_KERNEL_VERSION. We are not always exactly + recording the correct versions in which the features were + introduced. If somebody cares these values can afterwards be + corrected. Most of the numbers here are set corresponding to + 2.2.0. */ + +/* `getcwd' system call. */ +#if __LINUX_KERNEL_VERSION >= 131584 +# define __ASSUME_GETCWD_SYSCALL 1 +#endif /* Real-time signal became usable in 2.1.70. */ #if __LINUX_KERNEL_VERSION >= 131398 # define __ASSUME_REALTIME_SIGNALS 1 #endif -/* Beginning with 2.5.63 support for realtime and monotonic clocks and - timers based on them is available. */ -#if __LINUX_KERNEL_VERSION >= 132415 -# define __ASSUME_POSIX_TIMERS 1 +/* When were the `pread'/`pwrite' syscalls introduced? */ +#if __LINUX_KERNEL_VERSION >= 131584 +# define __ASSUME_PREAD_SYSCALL 1 +# define __ASSUME_PWRITE_SYSCALL 1 #endif -/* On x86, the set_thread_area syscall was introduced in 2.5.29, but its - semantics was changed in 2.5.30, and again after 2.5.31. */ -#if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__ -# define __ASSUME_SET_THREAD_AREA_SYSCALL 1 +/* When was `poll' introduced? */ +#if __LINUX_KERNEL_VERSION >= 131584 +# define __ASSUME_POLL_SYSCALL 1 +#endif + +/* The `lchown' syscall was introduced in 2.1.80. */ +#if __LINUX_KERNEL_VERSION >= 131408 +# define __ASSUME_LCHOWN_SYSCALL 1 +#endif + +/* When did the `setresuid' sysall became available? */ +#if __LINUX_KERNEL_VERSION >= 131584 && !defined __sparc__ +# define __ASSUME_SETRESUID_SYSCALL 1 +#endif + +/* The SIOCGIFNAME ioctl is available starting with 2.1.50. */ +#if __LINUX_KERNEL_VERSION >= 131408 +# define __ASSUME_SIOCGIFNAME 1 +#endif + +/* MSG_NOSIGNAL was at least available with Linux 2.2.0. */ +#if __LINUX_KERNEL_VERSION >= 131584 +# define __ASSUME_MSG_NOSIGNAL 1 +#endif + +/* On x86 another `getrlimit' syscall was added in 2.3.25. */ +#if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__ +# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 +#endif + +/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */ +#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ +# define __ASSUME_TRUNCATE64_SYSCALL 1 +#endif + +/* On x86 the mmap2 syscall was introduced in 2.3.31. */ +#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ +# define __ASSUME_MMAP2_SYSCALL 1 +#endif + +/* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */ +#if __LINUX_KERNEL_VERSION >= 131874 && defined __i386__ +# define __ASSUME_STAT64_SYSCALL 1 +#endif + +/* On sparc and ARM the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64 + syscalls were introduced in 2.3.35. */ +#if __LINUX_KERNEL_VERSION >= 131875 && (defined __sparc__ || defined __arm__) +# define __ASSUME_TRUNCATE64_SYSCALL 1 +# define __ASSUME_MMAP2_SYSCALL 1 +# define __ASSUME_STAT64_SYSCALL 1 +#endif + +/* I know for sure that getrlimit are in 2.3.35 on powerpc. */ +#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ +# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 +#endif + +/* I know for sure that these are in 2.3.35 on powerpc. But PowerPC64 does not + support separate 64-bit syscalls, already 64-bit */ +#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ \ + && !defined __powerpc64__ +# define __ASSUME_TRUNCATE64_SYSCALL 1 +# define __ASSUME_STAT64_SYSCALL 1 +#endif + +/* Linux 2.3.39 introduced 32bit UID/GIDs. Some platforms had 32 + bit type all along. */ +#if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__ +# define __ASSUME_32BITUIDS 1 +#endif + +/* Linux 2.3.39 sparc added setresuid. */ +#if __LINUX_KERNEL_VERSION >= 131879 && defined __sparc__ +# define __ASSUME_SETRESUID_SYSCALL 1 +#endif + +#if __LINUX_KERNEL_VERSION >= 131879 +# define __ASSUME_SETRESGID_SYSCALL 1 +#endif + +/* Linux 2.3.39 introduced IPC64. Except for powerpc. */ +#if __LINUX_KERNEL_VERSION >= 131879 && !defined __powerpc__ +# define __ASSUME_IPC64 1 +#endif + +/* MIPS platforms had IPC64 all along. */ +#if defined __mips__ +# define __ASSUME_IPC64 1 #endif /* We can use the LDTs for threading with Linux 2.3.99 and newer. */ @@ -50,6 +153,74 @@ # define __ASSUME_LDT_WORKS 1 #endif +/* Linux 2.4.0 on PPC introduced a correct IPC64. But PowerPC64 does not + support a separate 64-bit sys call, already 64-bit */ +#if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__ \ + && !defined __powerpc64__ +# define __ASSUME_IPC64 1 +#endif + +/* SH kernels got stat64, mmap2, and truncate64 during 2.4.0-test. */ +#if __LINUX_KERNEL_VERSION >= 132096 && defined __sh__ +# define __ASSUME_TRUNCATE64_SYSCALL 1 +# define __ASSUME_MMAP2_SYSCALL 1 +# define __ASSUME_STAT64_SYSCALL 1 +#endif + +/* The changed st_ino field appeared in 2.4.0-test6. But we cannot + distinguish this version from other 2.4.0 releases. Therefore play + save and assume it available is for 2.4.1 and up. However, SH is lame, + and still does not have a 64-bit inode field. */ +#if __LINUX_KERNEL_VERSION >= 132097 && !defined __alpha__ && !defined __sh__ +# define __ASSUME_ST_INO_64_BIT 1 +#endif + +/* To support locking of large files a new fcntl() syscall was introduced + in 2.4.0-test7. We test for 2.4.1 for the earliest version we know + the syscall is available. */ +#if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __sparc__) +# define __ASSUME_FCNTL64 1 +#endif + +/* The AT_CLKTCK auxiliary vector entry was introduction in the 2.4.0 + series. */ +#if __LINUX_KERNEL_VERSION >= 132097 +# define __ASSUME_AT_CLKTCK 1 +#endif + +/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I + don't know when it got introduced). But PowerPC64 does not support + separate FCNTL64 call, FCNTL is already 64-bit */ +#if __LINUX_KERNEL_VERSION >= 132100 \ + && (defined __arm__ || defined __powerpc__ || defined __sh__) \ + && !defined __powerpc64__ +# define __ASSUME_FCNTL64 1 +#endif + +/* The getdents64 syscall was introduced in 2.4.0-test7. We test for + 2.4.1 for the earliest version we know the syscall is available. */ +#if __LINUX_KERNEL_VERSION >= 132097 +# define __ASSUME_GETDENTS64_SYSCALL 1 +#endif + +/* When did O_DIRECTORY became available? Early in 2.3 but when? + Be safe, use 2.3.99. */ +#if __LINUX_KERNEL_VERSION >= 131939 +# define __ASSUME_O_DIRECTORY 1 +#endif + +/* Starting with one of the 2.4.0 pre-releases the Linux kernel passes + up the page size information. */ +#if __LINUX_KERNEL_VERSION >= 132097 +# define __ASSUME_AT_PAGESIZE 1 +#endif + +/* Starting with at least 2.4.0 the kernel passes the uid/gid unconditionally + up to the child. */ +#if __LINUX_KERNEL_VERSION >= 132097 +# define __ASSUME_AT_XID 1 +#endif + /* Starting with 2.4.5 kernels PPC passes the AUXV in the standard way and the vfork syscall made it into the official kernel. */ #if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ @@ -57,17 +228,72 @@ # define __ASSUME_VFORK_SYSCALL 1 #endif +/* Starting with 2.4.5 kernels the mmap2 syscall made it into the official + kernel. But PowerPC64 does not support a separate MMAP2 call. */ +#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ \ + && !defined __powerpc64__ +# define __ASSUME_MMAP2_SYSCALL 1 +#endif + +/* Starting with 2.4.21 PowerPC implements the new prctl syscall. + This allows applications to get/set the Floating Point Exception Mode. */ +#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__ +# define __ASSUME_NEW_PRCTL_SYSCALL 1 +#endif + +/* Starting with 2.4.21 the PowerPC32 clone syscall works as expected. */ +#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc__ \ + && !defined __powerpc64__ +# define __ASSUME_FIXED_CLONE_SYSCALL 1 +#endif + +/* Starting with 2.4.21 PowerPC64 implements the new rt_sigreturn syscall. + The new rt_sigreturn takes an ucontext pointer allowing rt_sigreturn + to be used in the set/swapcontext implementation. */ +#if __LINUX_KERNEL_VERSION >= (132096+21) && defined __powerpc64__ +# define __ASSUME_NEW_RT_SIGRETURN_SYSCALL 1 +#endif + +/* On x86, the set_thread_area syscall was introduced in 2.5.29, but its + semantics was changed in 2.5.30, and again after 2.5.31. */ +#if __LINUX_KERNEL_VERSION >= 132384 && defined __i386__ +# define __ASSUME_SET_THREAD_AREA_SYSCALL 1 +#endif + /* The vfork syscall on x86 and arm was definitely available in 2.4. */ #if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __arm__) # define __ASSUME_VFORK_SYSCALL 1 #endif -/* Starting with version 2.6.4-rc1 the getdents syscall returns d_type - * information as well and in between 2.6.5 and 2.6.8 most compat wrappers - * were fixed too. Except s390{,x} which was fixed in 2.6.11. */ -#if (__LINUX_KERNEL_VERSION >= 0x020608 && !defined __s390__) \ - || (__LINUX_KERNEL_VERSION >= 0x02060b && defined __s390__) -# define __ASSUME_GETDENTS32_D_TYPE 1 +/* There are an infinite number of PA-RISC kernel versions numbered + 2.4.0. But they've not really been released as such. We require + and expect the final version here. */ +#ifdef __hppa__ +# define __ASSUME_32BITUIDS 1 +# define __ASSUME_TRUNCATE64_SYSCALL 1 +# define __ASSUME_MMAP2_SYSCALL 1 +# define __ASSUME_STAT64_SYSCALL 1 +# define __ASSUME_IPC64 1 +# define __ASSUME_ST_INO_64_BIT 1 +# define __ASSUME_FCNTL64 1 +# define __ASSUME_GETDENTS64_SYSCALL 1 +#endif + +/* Alpha switched to a 64-bit timeval sometime before 2.2.0. */ +#if __LINUX_KERNEL_VERSION >= 131584 && defined __alpha__ +# define __ASSUME_TIMEVAL64 1 +#endif + +#if defined __mips__ && _MIPS_SIM == _ABIN32 +# define __ASSUME_FCNTL64 1 +#endif + +/* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize + their availability with one define. The changes were made first + for i386 and the have to be done separately for the other archs. + For i386 we pick 2.5.50 as the first version with support. */ +#if __LINUX_KERNEL_VERSION >= 132402 && defined __i386__ +# define __ASSUME_CLONE_THREAD_FLAGS 1 #endif /* Support for various CLOEXEC and NONBLOCK flags was added for x86, @@ -87,6 +313,137 @@ # define __ASSUME_VFORK_SYSCALL 1 #endif +/* Beginning with 2.5.63 support for realtime and monotonic clocks and + timers based on them is available. */ +#if __LINUX_KERNEL_VERSION >= 132415 +# define __ASSUME_POSIX_TIMERS 1 +#endif + +/* The late 2.5 kernels saw a lot of new CLONE_* flags. Summarize + their availability with one define. The changes were made first + for i386 and the have to be done separately for the other archs. + For ia64, s390*, PPC, x86-64 we pick 2.5.64 as the first version + with support. */ +#if __LINUX_KERNEL_VERSION >= 132416 \ + && (defined __ia64__ || defined __s390__ || defined __powerpc__ \ + || defined __x86_64__ || defined __sh__) +# define __ASSUME_CLONE_THREAD_FLAGS 1 +#endif + +/* With kernel 2.4.17 we always have netlink support. */ +#if __LINUX_KERNEL_VERSION >= (132096+17) +# define __ASSUME_NETLINK_SUPPORT 1 +#endif + +/* The requeue futex functionality was introduced in 2.5.70. */ +#if __LINUX_KERNEL_VERSION >= 132422 +# define __ASSUME_FUTEX_REQUEUE 1 +#endif + +/* The statfs64 syscalls are available in 2.5.74. */ +#if __LINUX_KERNEL_VERSION >= 132426 +# define __ASSUME_STATFS64 1 +#endif + +/* Starting with at least 2.5.74 the kernel passes the setuid-like exec + flag unconditionally up to the child. */ +#if __LINUX_KERNEL_VERSION >= 132426 +# define __ASSUME_AT_SECURE 1 +#endif + +/* Starting with the 2.5.75 kernel the kernel fills in the correct value + in the si_pid field passed as part of the siginfo_t struct to signal + handlers. */ +#if __LINUX_KERNEL_VERSION >= 132427 +# define __ASSUME_CORRECT_SI_PID 1 +#endif + +/* The tgkill syscall was instroduced for i386 in 2.5.75. For Alpha + it was introduced in 2.6.0-test1 which unfortunately cannot be + distinguished from 2.6.0. On x86-64, ppc, and ppc64 it was + introduced in 2.6.0-test3. */ +#if (__LINUX_KERNEL_VERSION >= 132427 && defined __i386__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __alpha__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __x86_64__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__) +# define __ASSUME_TGKILL 1 +#endif + +/* The utimes syscall has been available for some architectures + forever. For x86 it was introduced after 2.5.75, for x86-64, + ppc, and ppc64 it was introduced in 2.6.0-test3. */ +#if defined __alpha__ || defined __ia64__ || defined __hppa__ \ + || defined __sparc__ \ + || (__LINUX_KERNEL_VERSION > 132427 && defined __i386__) \ + || (__LINUX_KERNEL_VERSION > 132609 && defined __x86_64__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __powerpc__) \ + || (__LINUX_KERNEL_VERSION >= 132609 && defined __sh__) +# define __ASSUME_UTIMES 1 +#endif + +// XXX Disabled for now since the semantics we want is not achieved. +#if 0 +/* The CLONE_STOPPED flag w |