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2011-06-29locking support for random() prngRich Felker-7/+28
these interfaces are required to be thread-safe even though they are not state-free. the random number sequence is shared across all threads.
2011-06-29work around linux bug in mprotectRich Felker-1/+5
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.
2011-06-29textrel support, cheap and uglyRich Felker-0/+5
2011-06-28release notes for 0.7.11v0.7.11Rich Felker-0/+22
2011-06-28reclaim the memory wasted by dynamic linking for use by mallocRich Felker-0/+39
2011-06-28use type directives for fenv asm functionsRich Felker-0/+14
2011-06-28use load address from elf header if possibleRich Felker-1/+1
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.
2011-06-28make dynamic linker relocate the main program image last, after all libsRich Felker-0/+1
prior to this change, copy relocations for initialized pointer variables would not reflect the relocated contents of the pointer.
2011-06-28fix a few bugs from last dynamic linking build system commitRich Felker-2/+2
some cruft was left and DESTDIR was not being used correctly.
2011-06-27minor updates to INSTALL documentationRich Felker-0/+10
2011-06-27cleanup shared library build system to be more $HOME-local-install friendlyRich Felker-16/+21
the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
2011-06-27further fixup dlfcn.hRich Felker-4/+10
2011-06-27match LSB/glibc constants for dynamic loaderRich Felker-4/+4
2011-06-26fix stale pointer issue in dynamic linker with dlopenRich Felker-0/+1
2011-06-26don't leave the lock held on dlopen failure..Rich Felker-2/+2
2011-06-26add RTLD_DEFAULT supportRich Felker-1/+2
2011-06-26in dlopen: don't use null pointerRich Felker-3/+3
deps can be null if a library has no dependencies (such as libc itself)
2011-06-26fix resolving symbols in objects loaded in RTLD_LOCAL modeRich Felker-0/+11
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.
2011-06-26experimental dlopen/dlsym and dynlink changes needed to support themRich Felker-8/+125
2011-06-26type directives for x86_64 math asmRich Felker-0/+2
2011-06-26error handling in dynamic linkingRich Felker-2/+19
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.
2011-06-26fix useless use of potentially-uninitialized mode variable in sem_openRich Felker-1/+1
2011-06-26eliminate OOB array hacks in mallocRich Felker-46/+45
2011-06-26use .type directives for math asm (needed for dynamic linking to work)Rich Felker-0/+26
2011-06-25fix some symbol resolution issues in dynamic linkerRich Felker-4/+6
1. search was wrongly beginning with lib itself rather than dso head 2. inconsistent resolution of function pointers for functions in plt
2011-06-25fix dynamic linker issue in musl-gcc wrapperRich Felker-1/+1
2011-06-25wordexp cannot use we_offs unless WRDE_DOOFFS flag is setRich Felker-1/+2
previously, a potentially-indeterminate value from we_offs was being used, resulting in wrong we_wordc and subsequent crashes in the caller.
2011-06-25XSI search.h API implementation by Szabolcs NagyRich Felker-4/+392
2011-06-25handle library paths better (ignore empty path components, etc.)Rich Felker-3/+5
2011-06-25move all limits that don't vary out of bits/limits.h, into main limits.hRich Felker-53/+24
2011-06-25fix possible (questionable) strict aliasing violations and ptr arithRich Felker-3/+3
2011-06-25const correctness in mq_notifyRich Felker-1/+1
why did gcc allow this invalid assignment to compile in the first place?
2011-06-25proper path searching for dynamic linkerRich Felker-14/+42
first, use $LD_LIBRARY_PATH unless suid. if that fails, read path from /etc/ld-musl-$ARCH.path and fallback to a builtin default.
2011-06-25optimize opendir using O_CLOEXECRich Felker-2/+1
2011-06-25discard dso descriptors after performing relocationsRich Felker-0/+12
eventually (once dlopen exists) this behavior will be conditional on dlopen/dlsym not being reachable.
2011-06-25keep track of which dsos have been relocatedRich Felker-0/+1
2011-06-24use soname in ld-musl.so to prevent filename appearing in DT_NEEDEDsRich Felker-1/+1
2011-06-24use symlink rather than bogus linker script for libc.soRich Felker-2/+2
the linker script caused a bogus DT_NEEDED entry
2011-06-23adapt build/install/gcc-wrapper systems for dynamic linking supportRich Felker-9/+20
2011-06-23prepare support for LD_LIBRARY_PATH (checking suid/sgid safety)Rich Felker-0/+6
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.
2011-06-23initial commit of prng implementation by Szabolcs NagyRich Felker-12/+111
2011-06-19make ldso asm more uniform with rest of codebase (no unnecessary suffixes)Rich Felker-12/+12
2011-06-19x86_64: ensure that dtor pointer passed to app is 0 so it won't be usedRich Felker-0/+1
leaving it uninitialized caused unpredictable crashes or worse due to calling an indeterminate function pointer.
2011-06-18dynamic linker 64bit fix: hash table entries are always 32bitRich Felker-2/+2
2011-06-18experimental dynamic linker!Rich Felker-0/+466
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
2011-06-18fix memory leak on failure in realpathRich Felker-4/+4
2011-06-18copy-paste error in prctl.hRich Felker-1/+1
2011-06-16fix some struct padding to match LSB/glibc ABI where it may be helpfulRich Felker-2/+5
2011-06-16duplicate re_nsub in LSB/glibc ABI compatible locationRich Felker-2/+3
2011-06-14restore use of .type in asm, but use modern @function (vs %function)Rich Felker-0/+29
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.