Rich Felker
f7dff1852b
locking support for random() prng
these interfaces are required to be thread-safe even though they are
not state-free. the random number sequence is shared across all
threads.
15 years ago
Rich Felker
af3d5405b8
work around linux bug in mprotect
per POSIX: The mprotect() function shall change the access protections
to be that specified by prot for those whole pages containing any part
of the address space of the process starting at address addr and
continuing for len bytes.
on the other hand, linux mprotect fails with EINVAL if the base
address and/or length is not page-aligned, so we have to align them
before making the syscall.
15 years ago
Rich Felker
9f17413c75
textrel support, cheap and ugly
15 years ago
Rich Felker
2cee45762a
release notes for 0.7.11
15 years ago
Rich Felker
6717e62ac0
reclaim the memory wasted by dynamic linking for use by malloc
15 years ago
Rich Felker
e411827960
use type directives for fenv asm functions
15 years ago
Rich Felker
bf30100ad7
use load address from elf header if possible
this is mostly useless for shared libs (though it could help for
prelink-like purposes); the intended use case is for adding support
for calling the dynamic linker directly to run a program, as in:
./libc.so ./a.out foo
this usage is not yet supported.
15 years ago
Rich Felker
c7debe13ee
make dynamic linker relocate the main program image last, after all libs
prior to this change, copy relocations for initialized pointer
variables would not reflect the relocated contents of the pointer.
15 years ago
Rich Felker
8d54681f15
fix a few bugs from last dynamic linking build system commit
some cruft was left and DESTDIR was not being used correctly.
15 years ago
Rich Felker
f9c9d8c333
minor updates to INSTALL documentation
15 years ago
Rich Felker
207c45d7ab
cleanup shared library build system to be more $HOME-local-install friendly
the path for the dynamic linker is now configurable, and failure to
install the symlink for it will not stop the build.
15 years ago
Rich Felker
230f1813ad
further fixup dlfcn.h
15 years ago
Rich Felker
87a30ce50d
match LSB/glibc constants for dynamic loader
15 years ago
Rich Felker
9e17b71fa6
fix stale pointer issue in dynamic linker with dlopen
15 years ago
Rich Felker
06933cc724
don't leave the lock held on dlopen failure..
15 years ago
Rich Felker
97507bde47
add RTLD_DEFAULT support
15 years ago
Rich Felker
0e4dae3d77
in dlopen: don't use null pointer
deps can be null if a library has no dependencies (such as libc itself)
15 years ago
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.
15 years ago
Rich Felker
59ab43f5f8
experimental dlopen/dlsym and dynlink changes needed to support them
15 years ago
Rich Felker
bc30aea457
type directives for x86_64 math asm
15 years ago
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.
15 years ago
Rich Felker
6e53a6eca4
fix useless use of potentially-uninitialized mode variable in sem_open
15 years ago
Rich Felker
5d0965cb56
eliminate OOB array hacks in malloc
15 years ago
Rich Felker
e22c2d3ee6
use .type directives for math asm (needed for dynamic linking to work)
15 years ago
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
15 years ago
Rich Felker
1a3ff4f909
fix dynamic linker issue in musl-gcc wrapper
15 years ago
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.
15 years ago
Rich Felker
febbd12d00
XSI search.h API implementation by Szabolcs Nagy
15 years ago
Rich Felker
49388f3b7b
handle library paths better (ignore empty path components, etc.)
15 years ago
Rich Felker
e8b8f3c90e
move all limits that don't vary out of bits/limits.h, into main limits.h
15 years ago
Rich Felker
59633c736d
fix possible (questionable) strict aliasing violations and ptr arith
15 years ago
Rich Felker
4d95a58524
const correctness in mq_notify
why did gcc allow this invalid assignment to compile in the first place?
15 years ago
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.
15 years ago
Rich Felker
f937031800
optimize opendir using O_CLOEXEC
15 years ago
Rich Felker
e8dbf00a78
discard dso descriptors after performing relocations
eventually (once dlopen exists) this behavior will be conditional on
dlopen/dlsym not being reachable.
15 years ago
Rich Felker
368ba4a0a9
keep track of which dsos have been relocated
15 years ago
Rich Felker
e0b0ff1598
use soname in ld-musl.so to prevent filename appearing in DT_NEEDEDs
15 years ago
Rich Felker
a654b0243b
use symlink rather than bogus linker script for libc.so
the linker script caused a bogus DT_NEEDED entry
15 years ago
Rich Felker
ec05a0b08f
adapt build/install/gcc-wrapper systems for dynamic linking support
15 years ago
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.
15 years ago
Rich Felker
c7ce1b20d2
initial commit of prng implementation by Szabolcs Nagy
15 years ago
Rich Felker
d19adeec52
make ldso asm more uniform with rest of codebase (no unnecessary suffixes)
15 years ago
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.
15 years ago
Rich Felker
596d60c565
dynamic linker 64bit fix: hash table entries are always 32bit
15 years ago
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
15 years ago
Rich Felker
d43ff110bc
fix memory leak on failure in realpath
15 years ago
Rich Felker
5a2e74ebd2
copy-paste error in prctl.h
15 years ago
Rich Felker
7f5471529c
fix some struct padding to match LSB/glibc ABI where it may be helpful
15 years ago
Rich Felker
32aea2087a
duplicate re_nsub in LSB/glibc ABI compatible location
15 years ago
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.
15 years ago