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Rich Felker d5a5045382 fix MINSIGSTKSZ values for archs with large signal contexts 
the previous values (2k min and 8k default) were too small for some
archs. aarch64 reserves 4k in the signal context for future extensions
and requires about 4.5k total, and powerpc reportedly uses over 2k.
the new minimums are chosen to fit the saved context and also allow a
minimal signal handler to run.

since the default (SIGSTKSZ) has always been 6k larger than the
minimum, it is also increased to maintain the 6k usable by the signal
handler. this happens to be able to store one pathname buffer and
should be sufficient for calling any function in libc that doesn't
involve conversion between floating point and decimal representations.

x86 (both 32-bit and 64-bit variants) may also need a larger minimum
(around 2.5k) in the future to support avx-512, but the values on
these archs are left alone for now pending further analysis.

the value for PTHREAD_STACK_MIN is not increased to match MINSIGSTKSZ
at this time. this is so as not to preclude applications from using
extremely small thread stacks when they know they will not be handling
signals. unfortunately cancellation and multi-threaded set*id() use
signals as an implementation detail and therefore require a stack
large enough for a signal context, so applications which use extremely
small thread stacks may still need to avoid using these features.
 		2015-03-18 00:31:37 -04:00
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arpa add basic dns record parsing functions 2014-12-17 14:40:35 -05:00
net net/if_arp.h: add missing ARP hardware identifiers from linux uapi headers 2013-09-15 02:42:29 +00:00
netinet add new IPV6_AUTOFLOWLABEL socket option in netinet/in.h 2014-10-08 11:38:25 -04:00
netpacket
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scsi add legacy scsi/scsi_ioctl.h header 2013-07-03 18:07:50 +02:00
sys declare incomplete type struct itimerspec in timerfd.h 2015-03-04 14:38:08 -05:00
aio.h make all objects used with atomic operations volatile 2015-03-03 22:50:02 -05:00
alloca.h alloca cannot be a function. #define it to the gcc builtin if possible 2012-04-09 15:06:58 -04:00
alltypes.h.in move wint_t definition to the shared part of alltypes.h.in 2014-12-21 02:43:35 -05:00
ar.h some extra legacy header stuff 2012-05-06 16:35:32 -04:00
assert.h add static_assert and hide noreturn, alignas, alignof from C++ 2014-08-27 02:55:54 -04:00
byteswap.h remove all remaining redundant __restrict/__inline/_Noreturn defs 2012-09-08 17:14:52 -04:00
complex.h make the definition of _Complex_I explicitly complex 2014-12-17 16:47:34 -05:00
cpio.h
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crypt.h replace old and ugly crypt implementation 2012-06-29 00:56:37 -04:00
ctype.h suppress macro definitions of ctype functions under C++ 2014-10-14 12:30:50 -04:00
dirent.h refactor headers, especially alltypes.h, and improve C++ ABI compat 2013-07-22 11:22:36 -04:00
dlfcn.h const-qualify the address argument to dladdr 2014-01-06 22:03:38 -05:00
elf.h add or1k (OpenRISC 1000) architecture port 2014-07-18 14:10:23 -04:00
endian.h default features: make musl usable without feature test macros 2012-09-07 23:13:55 -04:00
err.h fix redundant _Noreturn def in err.h 2012-09-08 18:16:33 -04:00
errno.h add support for program_invocation[_short]_name 2013-04-06 17:50:37 -04:00
fcntl.h add new linux file sealing api to fcntl.h 2014-10-08 11:39:28 -04:00
features.h add _DEFAULT_SOURCE feature profile as an alias for _BSD_SOURCE 2014-09-10 12:47:55 -04:00
fenv.h
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float.h fix FLT_ROUNDS to reflect the current rounding mode 2015-03-07 12:05:28 -05:00
fmtmsg.h implement fmtmsg function 2014-06-21 19:24:15 -04:00
fnmatch.h remove now-unnecessary features.h inclusion from fnmatch.h 2013-12-02 02:06:52 -05:00
ftw.h remove unneeded judgemental commentary from ftw.h 2012-09-07 23:55:11 -04:00
getopt.h add getopt reset support 2012-09-30 20:00:38 -04:00
glob.h fix macros for LFS *64_t types in sys/stat.h, sys/types.h, glob.h 2014-09-05 16:03:07 -04:00
grp.h add put*ent functions for passwd/group files and similar for shadow 2013-04-04 19:23:47 -04:00
iconv.h remove all remaining redundant __restrict/__inline/_Noreturn defs 2012-09-08 17:14:52 -04:00
ifaddrs.h make ifaddrs.h expose sys/socket.h 2013-04-10 22:38:46 -04:00
inttypes.h fix inttypes.h PRI and SCN macros for [u]intptr_t types 2013-10-30 14:52:55 -04:00
iso646.h
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langinfo.h fix multiple minor namespace issues in headers 2013-10-20 22:01:51 -04:00
lastlog.h some extra legacy header stuff 2012-05-06 16:35:32 -04:00
libgen.h
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libintl.h
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limits.h increase TTY_NAME_MAX limit to 32 2013-11-29 12:45:09 -05:00
link.h add missing c++ extern "C" wrapping to link.h 2013-08-02 16:52:17 -04:00
locale.h restore type of NULL to void * except when used in C++ programs 2013-11-24 21:42:55 -05:00
malloc.h add malloc_usable_size function and non-stub malloc.h 2014-08-25 22:47:27 -04:00
math.h math.h: make __FLOAT_BITS and __DOUBLE_BITS C89 2014-03-09 19:29:41 +01:00
memory.h
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mntent.h
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monetary.h remove all remaining redundant __restrict/__inline/_Noreturn defs 2012-09-08 17:14:52 -04:00
mqueue.h remove all remaining redundant __restrict/__inline/_Noreturn defs 2012-09-08 17:14:52 -04:00
netdb.h add support for ipv6 scope_id to getaddrinfo and getnameinfo 2014-06-04 02:24:38 -04:00
nl_types.h refactor headers, especially alltypes.h, and improve C++ ABI compat 2013-07-22 11:22:36 -04:00
paths.h remove duplicate definition of _PATH_LASTLOG in paths.h 2013-12-03 20:34:36 -05:00
poll.h fix preprocessor error introduced in poll.h in last commit 2015-03-04 14:15:44 -05:00
pthread.h add new masked cancellation mode 2015-02-21 22:05:15 -05:00
pty.h
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pwd.h add put*ent functions for passwd/group files and similar for shadow 2013-04-04 19:23:47 -04:00
regex.h make regoff_t and regex_t match C++ ABI 2013-07-22 14:39:59 -04:00
resolv.h fix res_mkquery and res_send prototypes in resolv.h 2013-12-04 21:31:39 +00:00
sched.h fix CPU_EQUAL macro in sched.h 2014-08-13 16:55:56 +02:00
search.h implement hcreate_r, hdestroy_r and hsearch_r 2014-04-02 18:37:45 -04:00
semaphore.h make all objects used with atomic operations volatile 2015-03-03 22:50:02 -05:00
setjmp.h change jmp_buf to share an underlying type and struct tag with sigjmp_buf 2013-07-24 02:17:02 -04:00
shadow.h
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signal.h fix MINSIGSTKSZ values for archs with large signal contexts 2015-03-18 00:31:37 -04:00
spawn.h fix some restrict-qualifier mismatches in newly added interfaces 2012-11-27 09:44:30 -05:00
stdalign.h add static_assert and hide noreturn, alignas, alignof from C++ 2014-08-27 02:55:54 -04:00
stdarg.h
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stdbool.h stdbool.h should define __bool_true_false_are_defined even for C++ 2013-08-28 00:41:00 -04:00
stddef.h add max_align_t definition for C11 and C++11 2014-08-20 17:20:14 -04:00
stdint.h fix signedness of UINT32_MAX and UINT64_MAX at the preprocessor level 2014-12-21 02:30:29 -05:00
stdio.h restore type of NULL to void * except when used in C++ programs 2013-11-24 21:42:55 -05:00
stdio_ext.h stdio_ext.h needs to include stdio.h, at least to get FILE... 2012-08-24 16:16:30 -04:00
stdlib.h fix places where _BSD_SOURCE failed to yield a superset of _XOPEN_SOURCE 2014-09-10 12:27:33 -04:00
stdnoreturn.h add static_assert and hide noreturn, alignas, alignof from C++ 2014-08-27 02:55:54 -04:00
string.h restore type of NULL to void * except when used in C++ programs 2013-11-24 21:42:55 -05:00
strings.h implement ffsl and ffsll functions 2014-07-31 02:38:23 -04:00
stropts.h add isastream (obsolete STREAMS junk) 2012-05-06 09:03:19 -04:00
syscall.h header file fixes: multiple include guard consistency and correctness 2012-06-15 21:52:53 -04:00
sysexits.h
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syslog.h remove hack in syslog.h that resulted in aliasing violations 2014-06-21 07:44:46 -04:00
tar.h
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termios.h default features: make musl usable without feature test macros 2012-09-07 23:13:55 -04:00
tgmath.h math: more correct tgmath.h type cast logic 2012-12-19 10:57:54 +01:00
threads.h don't shadow functions with macros in C++ 2014-12-09 22:34:56 -05:00
time.h fix places where _BSD_SOURCE failed to yield a superset of _XOPEN_SOURCE 2014-09-10 12:27:33 -04:00
uchar.h implement uchar.h (C11 UTF-16/32 conversion) interfaces 2014-10-13 20:59:42 -04:00
ucontext.h fixup mcontext stuff to expost gregset_t/fpregset_t as appropriate 2012-11-25 23:04:23 -05:00
ulimit.h
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unistd.h fix places where _BSD_SOURCE failed to yield a superset of _XOPEN_SOURCE 2014-09-10 12:27:33 -04:00
utime.h
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utmp.h add login_tty function 2014-12-20 20:13:27 -05:00
utmpx.h fix namespace violations in utmpx.h 2014-01-08 19:36:29 -05:00
values.h add legacy header values.h 2013-01-04 20:36:34 +01:00
wait.h add workaround header for wait.h remapping to sys/wait.h 2013-09-01 01:01:31 -04:00
wchar.h suppress macro definitions of ctype functions under C++ 2014-10-14 12:30:50 -04:00
wctype.h suppress macro definitions of ctype functions under C++ 2014-10-14 12:30:50 -04:00
wordexp.h remove all remaining redundant __restrict/__inline/_Noreturn defs 2012-09-08 17:14:52 -04:00