Commit Graph

138 Commits

Author SHA1 Message Date
Rich Felker
7d57e05fa8 add prototypes for pthread_condattr_* and pthread_rwlockattr_* 2011-03-07 16:45:48 -05:00
Rich Felker
cc2e0b45a6 implement pthread_rwlockattr_* (essentially no-ops) 2011-03-07 16:43:25 -05:00
Rich Felker
b4d40e44e3 implement pthread_condattr_* interfaces
note that, while the attributes are stored, they are not used in
pthread_cond_init yet.
2011-03-07 16:20:12 -05:00
Rich Felker
63b06c0e90 reject invalid attribute settings
note that this is a pedantic conformance issue and waste of code. it
only affects broken code or code that is probing for conformance.
2011-03-07 15:46:37 -05:00
Rich Felker
951e764091 implement barrier attribute functions (essentially no-ops) 2011-03-07 15:42:52 -05:00
Rich Felker
8c967b9386 enforce stack size min in pthread_attr_setstacksize 2011-03-04 00:59:14 -05:00
Rich Felker
6fc5fdbdc7 implement POSIX semaphores 2011-03-04 00:45:59 -05:00
Rich Felker
03dcc3417c preliminaries to adding POSIX semaphores 2011-03-03 18:32:26 -05:00
Rich Felker
b480808a6a optimize POSIX TSD for fast pthread_getspecific 2011-03-03 18:30:44 -05:00
Rich Felker
a53d2f3425 namespace cleanup in sys/mman.h 2011-03-03 00:32:15 -05:00
Rich Felker
ebd7af6940 implement POSIX shared memory 2011-03-03 00:30:31 -05:00
Rich Felker
71df8b2760 use -L/...../ -lgcc instead of /...../libgcc.a in musl-gcc wrapper
this should avoid warnings about unused libs when not linking, and
might fix some other obscure issues too. i might replace this approach
with a completely different one soon though.
2011-03-01 12:04:36 -05:00
Rich Felker
07e9d63b8f depends on settimeofday which needs _GNU_SOURCE feature test 2011-03-01 11:57:19 -05:00
Rich Felker
eda8e9da76 implement futimens and utimensat 2011-02-27 03:48:57 -05:00
Rich Felker
b1b465c438 cleanup namespace in sys/time.h 2011-02-27 03:48:19 -05:00
Rich Felker
f2374ed852 implement fexecve 2011-02-27 02:59:23 -05:00
Rich Felker
015d33c507 cleanup utf-8 multibyte code, use visibility if possible
this code was written independently of musl, with support for a the
backwards, nonstandard "31-bit unicode" some libraries/apps might
want. unfortunately the extra code (inside #ifdef) makes the source
harder to read and makes code that should be simple look complex, so
i'm removing it. anyone who wants to use the old code can find it in
the history or from elsewhere.

also, change the visibility of the __fsmu8 state machine table to
hidden, if supported. this should improve performance slightly in
shared-library builds.
2011-02-27 00:28:59 -05:00
Rich Felker
2a195dd31c fix missing prototype for strsignal 2011-02-26 23:50:26 -05:00
Rich Felker
41d518360f various changes in preparation for dynamic linking support
prefer using visibility=hidden for __libc internal data, rather than
an accessor function, if the compiler has visibility.

optimize with -O3 for PIC targets (shared library). without heavy
inlining, reloading the GOT register in small functions kills
performance. 20-30% size increase for a single libc.so is not a big
deal, compared to comparaible size increase in every static binaries.

use -Bsymbolic-functions, not -Bsymbolic. global variables are subject
to COPY relocations, and thus binding their addresses in the library
at link time will cause library functions to read the wrong (original)
copies instead of the copies made in the main program's bss section.

add entry point, _start, for dynamic linker.
2011-02-24 16:37:21 -05:00
Rich Felker
73d310e1d2 apply feature test protection to memccpy 2011-02-24 12:36:04 -05:00
Rich Felker
b8ff2aaabb add implementation of memccpy function 2011-02-24 12:35:42 -05:00
Rich Felker
9f19b3ec8d fix backwards conditional in stpncpy
this only made the function unnecessarily slow on systems with
unaligned access, but would of course crash on systems that can't do
unaligned accesses (none of which have ports yet).
2011-02-24 12:34:31 -05:00
Rich Felker
a6238c30d1 rewind must clear the error indicator in addition to seeking 2011-02-22 17:11:35 -05:00
Rich Felker
71e6be641f change errno to static linkage (improves PIC code generation) 2011-02-21 23:00:52 -05:00
Rich Felker
8cd48f0965 cleanup comment cruft in startup code 2011-02-21 22:27:35 -05:00
Rich Felker
e2ee1bdd8d make startup code PIE-compatible 2011-02-21 22:26:31 -05:00
Rich Felker
cfcbea1e43 remove sample utf-8 code that's not part of the standard library 2011-02-21 15:43:26 -05:00
Rich Felker
d89c9e8a63 use an accessor function for __libc data pointer when compiled as PIC
prior to this change, a large portion of libc was unusable prior to
relocation by the dynamic linker, due to dependence on the global data
in the __libc structure and the need to obtain its address through the
GOT. with this patch, the accessor function __libc_loc is now able to
obtain the address of __libc via PC-relative addressing without using
the GOT. this means the majority of libc functionality is now
accessible right away.

naturally, the above statements all depend on having an architecture
where PC-relative addressing and jumps/calls are feasible, and a
compiler that generates the appropriate code.
2011-02-20 22:30:06 -05:00
Rich Felker
4ee039f354 avoid referencing address of extern function from vdprintf
this change is in preparation for upcoming PIC/shared library support.
the intent is to avoid going through the GOT, mainly so that dprintf
is operable immediately, prior to processing of relocations. having
dprintf accessible from the dynamic linker will make writing and
debugging the dynamic linker much easier.
2011-02-20 22:24:28 -05:00
Rich Felker
ba68efc921 shave off 2 bytes from crt1.o _start 2011-02-20 19:07:19 -05:00
Rich Felker
3075f7e847 cleanup asprintf stuff 2011-02-20 17:19:37 -05:00
Rich Felker
46b99426e1 prototypes for GNU asprintf/vasprintf 2011-02-20 17:17:09 -05:00
Rich Felker
bdc9ed1565 fix %n specifier, again. this time it was storing the wrong value. 2011-02-20 17:10:40 -05:00
Rich Felker
f552c792c7 include sys/sysmacros.h from sys/types.h when _GNU_SOURCE is defined 2011-02-20 16:34:10 -05:00
Rich Felker
b1b752372f fix typo in inotify structure 2011-02-20 16:21:39 -05:00
Rich Felker
26031da0f8 make malloc(0) return unique pointers rather than NULL
this change is made with some reluctance, but i think it's for the
best. correct programs must handle either behavior, so there is little
advantage to having malloc(0) return NULL. and i managed to actually
make the malloc code slightly smaller with this change.
2011-02-20 16:16:33 -05:00
Rich Felker
598a0147cd fix simple_malloc malloc(0) behavior not to return non-unique pointers 2011-02-20 16:12:09 -05:00
Rich Felker
a23baf586a fix simple_malloc size restrictions
do not allow allocations that overflow ptrdiff_t; fix some overflow
checks that were not quite right but didn't matter due to address
layout implementation.
2011-02-20 16:10:38 -05:00
Rich Felker
96f2197494 fix null pointer dereference introduced in last sigprocmask commit 2011-02-20 15:16:04 -05:00
Rich Felker
eee150f39c make real symbols for the legacy (nonstandardized) utmp functions
this is needed in the long term for ABI compatibility anyway, and in
the immediate, it helps with building broken programs like GNU screen
that try to prototype the functions themselves rather than using the
header.
2011-02-20 15:06:26 -05:00
Rich Felker
d6a1e0c79e resolve some header namespace non-issues
after re-reading 2.2.2 of POSIX 2008, all of these are in the correct
reserved namespaces and do not need protection.
2011-02-20 02:44:52 -05:00
Rich Felker
855df698c4 move the GNU siginfo renaming so it doesn't lead to mismatching names 2011-02-20 01:48:51 -05:00
Rich Felker
8668f033bc fill in some missing siginfo stuff in signal.h 2011-02-20 01:26:25 -05:00
Rich Felker
2b43ef8fc7 make sys/param.h not depend on PATH_MAX and NAME_MAX
this is a nonstandard header used only by backwards programs, but for
some reason it's extremely popular. the recent namespace cleanup fixes
broke it, because PATH_MAX and NAME_MAX will not be defined unless an
approriate feature test macro has been defined. moreover, it's too
late to just #define _GNU_SOURCE in param.h, since limits.h may have
already been included.

let's just hard-code standard values and be done with it.
2011-02-20 00:28:10 -05:00
Rich Felker
13e8459232 workaround gcc bug 46926 by providing a dumb sincos implementation
note that this library itself is built with -ffreestanding so sincos.c
should not be miscompiled even if the gcc used to compile musl has
this bug.
2011-02-19 17:56:57 -05:00
Rich Felker
98e02144da use rt_sigprocmask, not legacy sigprocmask, syscall in pthread exit code 2011-02-19 15:21:05 -05:00
Rich Felker
5316d083ec fix typo in wordexp.h (note that the function is still unimplemented) 2011-02-19 12:44:36 -05:00
Rich Felker
4b1244a0bf implement the remaining clock_* interfaces 2011-02-19 12:43:56 -05:00
Rich Felker
19eb13b9a4 race condition fix: block all signals before decrementing thread count
the existence of a (kernelspace) thread must never have observable
effects after the thread count is decremented. if signals are not
blocked, it could end up handling the signal for rsyscall and
contributing towards the count of threads which have changed ids,
causing a thread to be missed. this could lead to one thread retaining
unwanted privilege level.

this change may also address other subtle race conditions in
application code that uses signals.
2011-02-19 11:04:36 -05:00
Rich Felker
a49c119276 prevent sigprocmask/pthread_sigmask from blocking implementation signals
this code was wrongly disabled because the old version was trying to
be too clever and didn't work. replaced it with a simple version for
now.
2011-02-19 10:51:13 -05:00