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2011-07-24workaround for gcc's optimizer breaking dynamic symbol resolutionRich Felker-1/+2
2011-07-24load vdso, if present, into the dso listRich Felker-2/+31
2011-07-24const correctness on function pointerRich Felker-1/+1
2011-07-24simplify dynamic linker startupRich Felker-23/+17
instead of creating temp dso objects on the stack and moving them to the heap if dlopen/dlsym are used, use static objects to begin with, and just donate them to malloc if we no longer need them.
2011-07-23some preliminaries for vdso clock supportRich Felker-7/+35
these changes also make it so clock_gettime(CLOCK_REALTIME, &ts) works even on pre-2.6 kernels, emulated via the gettimeofday syscall. there is no cost for the fallback check, as it falls under the error case that already must be checked for storing the error code in errno, but which would normally be hidden inside __syscall_ret.
2011-07-22check for fd exhaustion in forkptyRich Felker-2/+15
we cannot report failure after forking, so the idea is to ensure prior to fork that fd 0,1,2 exist. this will prevent dup2 from possibly hitting a resource limit and failing in the child process. fcntl rather than dup2 is used prior to forking to avoid race conditions.
2011-07-22incorrect check for open failure in openpty functionRich Felker-1/+1
-1, not 0, indicates failure
2011-07-21fix errno value when fdopendir is given an invalid file descriptorRich Felker-1/+4
this resolves an issue reported by Vasiliy Kulikov
2011-07-16ensure in fork that child gets its own new robust mutex listRich Felker-0/+1
2011-07-16fix logic error in freadRich Felker-6/+1
fread was calling f->read without checking that the file was in reading mode. this could: 1. crash, if f->read was a null pointer 2. cause unwanted blocking on a terminal already at eof 3. allow reading on a write-only file
2011-07-14fix various bugs in new integer parser frameworkRich Felker-10/+15
1. my interpretation of subject sequence definition was wrong. adjust parser to conform to the standard. 2. some code for handling tail overflow case was missing (forgot to finish writing it). 3. typo (= instead of ==) caused ERANGE to wrongly behave like EINVAL
2011-07-14fix wcsto[iu]max with high charactersRich Felker-4/+2
stopping without letting the parser see a stop character prevented getting a result. so treat all high chars as the null character and pass them into the parser. also eliminated ugly tmp var using compound literals.
2011-07-14new restartable integer parsing framework.Rich Felker-156/+197
this fixes a number of bugs in integer parsing due to lazy haphazard wrapping, as well as some misinterpretations of the standard. the new parser is able to work character-at-a-time or on whole strings, making it easy to support the wide functions without unbounded space for conversion. it will also be possible to update scanf to use the new parser.
2011-07-12gb18030 support in iconv (only from, not to)Rich Felker-2/+1887
also support (and restrict to subsets) older chinese sets, and explicitly refuse to convert to cjk (since there's no code for it yet)
2011-07-12"implement" getnetbyaddr and getnetbynameRich Felker-0/+12
these are useless legacy functions but some old software contains cruft that expects them to exist...
2011-07-12legacy japanese charset support in iconv (only from, not to)Rich Felker-0/+597
2011-07-12simplify iconv and support more legacy codepagesRich Felker-352/+331
2011-07-04printf: "if a precision is specified, the '0' flag shall be ignored."Rich Felker-1/+1
2011-07-04zero precision with zero value should not inhibit prefix/width printingRich Felker-1/+4
2011-07-04printf("%#x",0) should print 0 not 0x0Rich Felker-1/+1
2011-07-03iconv was not returning -1 on most failureRich Felker-0/+2
this broke most uses of iconv in real-world programs, especially glib's iconv wrappers.
2011-07-01fix dlopen UB due to longjmp/volatile rules violationRich Felker-1/+1
2011-06-30res_search symbol, aliased to res_query for now (better than nothing)Rich Felker-0/+3
2011-06-30simple rpath support (no token expansion yet) for dynamic linkerRich Felker-2/+8
2011-06-30fix error in previous ld80 fpclassify commitRich Felker-1/+1
2011-06-30catch invalid ld80 bit patterns and treat them as nanRich Felker-2/+2
this should not be necessary - the invalid bit patterns cannot be created except through type punning. however, some broken gnu software is passing them to printf and triggering dangerous stack-smashing, so let's catch them anyway...
2011-06-30fix logic in __fwritingRich Felker-1/+1
2011-06-30add and consolidate nasty stdio_ext junkRich Felker-17/+57
hopefully this resolves the rest of the issues with hideously nonportable hacks in programs that use gnulib.
2011-06-30implement the nonstandard GNU function fpurgeRich Felker-0/+11
this is a really ugly and backwards function, but its presence will prevent lots of broken gnulib software from trying to define its own version of fpurge and thereby failing to build or worse.
2011-06-30fix buffer overrun in getgrent code when there are no group membersRich Felker-4/+8
2011-06-29posix_memalign should fail if size is not a multiple of sizeof(void *)Rich Felker-1/+1
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
2011-06-28reclaim 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.
2011-06-26fix 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/+4
1. search was wrongly beginning with lib itself rather than dso head 2. inconsistent resolution of function pointers for functions in plt