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* add dummy __cxa_finalizeRich Felker2011-10-141-0/+4
| | | | | | musl's dynamic linker does not support unloading dsos, so there's nothing for this function to do. adding the symbol in case anything depends on its presence..
* support __cxa_atexit, and registering atexit functions from atexit handlersRich Felker2011-10-141-7/+26
| | | | | mildly tested; may have bugs. the locking should be updated not to use spinlocks but that's outside the scope of this one module.
* simplify atexit and fflush-on-exit handlingRich Felker2011-10-142-8/+8
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* consistency: change all remaining syscalls to use SYS_ rather than __NR_ prefixRich Felker2011-04-061-2/+2
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* major stdio overhaul, using readv/writev, plus other changesRich Felker2011-03-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the biggest change in this commit is that stdio now uses readv to fill the caller's buffer and the FILE buffer with a single syscall, and likewise writev to flush the FILE buffer and write out the caller's buffer in a single syscall. making this change required fundamental architectural changes to stdio, so i also made a number of other improvements in the process: - the implementation no longer assumes that further io will fail following errors, and no longer blocks io when the error flag is set (though the latter could easily be changed back if desired) - unbuffered mode is no longer implemented as a one-byte buffer. as a consequence, scanf unreading has to use ungetc, to the unget buffer has been enlarged to hold at least 2 wide characters. - the FILE structure has been rearranged to maintain the locations of the fields that might be used in glibc getc/putc type macros, while shrinking the structure to save some space. - error cases for fflush, fseek, etc. should be more correct. - library-internal macros are used for getc_unlocked and putc_unlocked now, eliminating some ugly code duplication. __uflow and __overflow are no longer used anywhere but these macros. switch to read or write mode is also separated so the code can be better shared, e.g. with ungetc. - lots of other small things.
* syscall overhaul part two - unify public and internal syscall interfaceRich Felker2011-03-191-3/+2
| | | | | | | | | | | | | | | | with this patch, the syscallN() functions are no longer needed; a variadic syscall() macro allows syscalls with anywhere from 0 to 6 arguments to be made with a single macro name. also, manually casting each non-integer argument with (long) is no longer necessary; the casts are hidden in the macros. some source files which depended on being able to define the old macro SYSCALL_RETURNS_ERRNO have been modified to directly use __syscall() instead of syscall(). references to SYSCALL_SIGSET_SIZE and SYSCALL_LL have also been changed. x86_64 has not been tested, and may need a follow-up commit to fix any minor bugs/oversights.
* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-125-0/+111