Rich Felker
230f1813ad
further fixup dlfcn.h
2011-06-27 01:02:28 -04:00
Rich Felker
87a30ce50d
match LSB/glibc constants for dynamic loader
2011-06-27 01:01:19 -04:00
Rich Felker
9e17b71fa6
fix stale pointer issue in dynamic linker with dlopen
2011-06-26 22:39:34 -04:00
Rich Felker
06933cc724
don't leave the lock held on dlopen failure..
2011-06-26 22:09:32 -04:00
Rich Felker
97507bde47
add RTLD_DEFAULT support
2011-06-26 21:50:01 -04:00
Rich Felker
0e4dae3d77
in dlopen: don't use null pointer
...
deps can be null if a library has no dependencies (such as libc itself)
2011-06-26 21:36:44 -04:00
Rich Felker
92ab5d8d15
fix resolving symbols in objects loaded in RTLD_LOCAL mode
...
basically we temporarily make the library and all its dependencies
part of the global namespace but only for the duration of performing
relocations, then return them to their former state.
2011-06-26 21:21:04 -04:00
Rich Felker
59ab43f5f8
experimental dlopen/dlsym and dynlink changes needed to support them
2011-06-26 19:23:28 -04:00
Rich Felker
bc30aea457
type directives for x86_64 math asm
2011-06-26 17:41:34 -04:00
Rich Felker
6b3d5e508f
error handling in dynamic linking
...
some of the code is not yet used, and is in preparation for dlopen
which needs to be able to handle failure loading libraries without
terminating the program.
2011-06-26 17:39:17 -04:00
Rich Felker
6e53a6eca4
fix useless use of potentially-uninitialized mode variable in sem_open
2011-06-26 16:34:05 -04:00
Rich Felker
5d0965cb56
eliminate OOB array hacks in malloc
2011-06-26 16:12:43 -04:00
Rich Felker
e22c2d3ee6
use .type directives for math asm (needed for dynamic linking to work)
2011-06-26 15:52:37 -04:00
Rich Felker
32de61e81a
fix some symbol resolution issues in dynamic linker
...
1. search was wrongly beginning with lib itself rather than dso head
2. inconsistent resolution of function pointers for functions in plt
2011-06-25 22:36:21 -04:00
Rich Felker
1a3ff4f909
fix dynamic linker issue in musl-gcc wrapper
2011-06-25 18:57:17 -04:00
Rich Felker
6250c0be4b
wordexp cannot use we_offs unless WRDE_DOOFFS flag is set
...
previously, a potentially-indeterminate value from we_offs was being
used, resulting in wrong we_wordc and subsequent crashes in the
caller.
2011-06-25 18:54:33 -04:00
Rich Felker
febbd12d00
XSI search.h API implementation by Szabolcs Nagy
2011-06-25 18:18:57 -04:00
Rich Felker
49388f3b7b
handle library paths better (ignore empty path components, etc.)
2011-06-25 17:49:16 -04:00
Rich Felker
e8b8f3c90e
move all limits that don't vary out of bits/limits.h, into main limits.h
2011-06-25 15:38:00 -04:00
Rich Felker
59633c736d
fix possible (questionable) strict aliasing violations and ptr arith
2011-06-25 12:26:08 -04:00
Rich Felker
4d95a58524
const correctness in mq_notify
...
why did gcc allow this invalid assignment to compile in the first place?
2011-06-25 09:23:36 -04:00
Rich Felker
568b8075a4
proper path searching for dynamic linker
...
first, use $LD_LIBRARY_PATH unless suid. if that fails, read path from
/etc/ld-musl-$ARCH.path and fallback to a builtin default.
2011-06-25 01:56:34 -04:00
Rich Felker
f937031800
optimize opendir using O_CLOEXEC
2011-06-25 01:38:25 -04:00
Rich Felker
e8dbf00a78
discard dso descriptors after performing relocations
...
eventually (once dlopen exists) this behavior will be conditional on
dlopen/dlsym not being reachable.
2011-06-25 00:47:28 -04:00
Rich Felker
368ba4a0a9
keep track of which dsos have been relocated
2011-06-25 00:18:19 -04:00
Rich Felker
e0b0ff1598
use soname in ld-musl.so to prevent filename appearing in DT_NEEDEDs
2011-06-24 18:32:30 -04:00
Rich Felker
a654b0243b
use symlink rather than bogus linker script for libc.so
...
the linker script caused a bogus DT_NEEDED entry
2011-06-24 14:02:47 -04:00
Rich Felker
ec05a0b08f
adapt build/install/gcc-wrapper systems for dynamic linking support
2011-06-23 22:13:47 -04:00
Rich Felker
b7f6e0c6f8
prepare support for LD_LIBRARY_PATH (checking suid/sgid safety)
...
the use of this test will be much stricter than glibc and other
typical implementations; the environment will not be honored
whatsoever unless the program is confirmed non-suid/sgid by the aux
vector the kernel passed in. no fallback to slow syscall-based
checking is used if the kernel fails to provide the information; we
simply assume the worst (suid) in this case and refuse to honor
environment.
2011-06-23 22:04:06 -04:00
Rich Felker
c7ce1b20d2
initial commit of prng implementation by Szabolcs Nagy
2011-06-23 18:02:23 -04:00
Rich Felker
d19adeec52
make ldso asm more uniform with rest of codebase (no unnecessary suffixes)
2011-06-19 22:42:10 -04:00
Rich Felker
779165e6d4
x86_64: ensure that dtor pointer passed to app is 0 so it won't be used
...
leaving it uninitialized caused unpredictable crashes or worse due to
calling an indeterminate function pointer.
2011-06-19 08:33:27 -04:00
Rich Felker
596d60c565
dynamic linker 64bit fix: hash table entries are always 32bit
2011-06-18 22:52:01 -04:00
Rich Felker
51e2d83102
experimental dynamic linker!
...
some notes:
- library search path is hard coded
- x86_64 code is untested and may not work
- dlopen/dlsym is not yet implemented
- relocations in read-only memory won't work
2011-06-18 19:48:42 -04:00
Rich Felker
d43ff110bc
fix memory leak on failure in realpath
2011-06-18 07:41:14 -04:00
Rich Felker
5a2e74ebd2
copy-paste error in prctl.h
2011-06-18 07:39:05 -04:00
Rich Felker
7f5471529c
fix some struct padding to match LSB/glibc ABI where it may be helpful
2011-06-16 17:11:35 -04:00
Rich Felker
32aea2087a
duplicate re_nsub in LSB/glibc ABI compatible location
2011-06-16 16:53:11 -04:00
Rich Felker
c7d19f9923
restore use of .type in asm, but use modern @function (vs %function)
...
this seems to be necessary to make the linker accept the functions in
a shared library (perhaps to generate PLT entries?)
strictly speaking libc-internal asm should not need it. i might clean
that up later.
2011-06-14 23:15:08 -04:00
Rich Felker
836ba93d93
__syscall5 inline is having trouble with PIC; just use the function for now
2011-06-14 23:14:22 -04:00
Rich Felker
7779dbd266
fix race condition in pthread_kill
...
if thread id was reused by the kernel between the time pthread_kill
read it from the userspace pthread_t object and the time of the tgkill
syscall, a signal could be sent to the wrong thread. the tgkill
syscall was supposed to prevent this race (versus the old tkill
syscall) but it can't; it can only help in the case where the tid is
reused in a different process, but not when the tid is reused in the
same process.
the only solution i can see is an extra lock to prevent threads from
exiting while another thread is trying to pthread_kill them. it should
be very very cheap in the non-contended case.
2011-06-14 01:35:51 -04:00
Rich Felker
f58c8a0f39
run dtors before taking the exit-lock in pthread exit
...
previously a long-running dtor could cause pthread_detach to block.
2011-06-14 01:25:17 -04:00
Rich Felker
6232b96f51
minor locking optimizations
2011-06-14 01:23:42 -04:00
Rich Felker
0e1762539c
avoid 64bit warnings when using pointers as entropy for temp names
2011-06-13 20:52:01 -04:00
Rich Felker
f09e78de98
fix sigset macro for 64-bit systems (<< was overflowing due to wrong type)
2011-06-13 20:37:52 -04:00
Rich Felker
1e4f1cf154
remove all .size and .type directives for functions from the asm
...
these are useless and have caused problems for users trying to build
with non-gnu tools like tcc's assembler.
2011-06-13 20:28:14 -04:00
Rich Felker
76100a724e
remove old useless timezone.s file (unused)
2011-06-13 20:21:21 -04:00
Rich Felker
73d2fde119
fix wrong type for wcsrchr argument 2
2011-06-13 14:06:04 -04:00
Rich Felker
773b0fe447
x86_64 fenv support (untested; at least known to build successfully)
2011-06-13 13:37:43 -04:00
Rich Felker
52cf24a0f4
fix fesetround - it was writing to status word instead of control word
2011-06-13 13:37:16 -04:00
