riscv/musl - musl - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
Rich Felker	b2486a8922	move rsyscall out of pthread_create module this is something of a tradeoff, as now setid() functions, rather than pthread_create, are what pull in the code overhead for dealing with linux's refusal to implement proper POSIX thread-vs-process semantics. my motivations are: 1. it's cleaner this way, especially cleaner to optimize out the rsyscall locking overhead from pthread_create when it's not needed. 2. it's expected that only a tiny number of core system programs will ever use setid() functions, whereas many programs may want to use threads, and making thread overhead tiny is an incentive for "light" programs to try threads.	15 years ago
Rich Felker	74950b336d	pthread exit stuff: don't bother setting errno when we won't check it.	15 years ago
Rich Felker	622804ece7	fix rsyscall handler: must not clobber errno from signal context	15 years ago
Rich Felker	095ad15673	fix typo in sys/msg.h	15 years ago
Rich Felker	92bd4c6031	add startup abi functions, dummy for now. eventually needed for c++ support.	15 years ago
Rich Felker	97d0988fd8	add _res (__res_state()) dummy	15 years ago
Rich Felker	2b55a619e4	add IN_LOOPBACKNET constant (nonstandard but in reserved namespace)	15 years ago
Rich Felker	00817f0739	document more changes for 0.7.7	15 years ago
Rich Felker	1fee6186fe	fix prototype for strsep	15 years ago
Rich Felker	6b87e941f9	fix completely bogus loop condition in getmntent_r somehow this worked on my simple fstab, but horribly broke in general, leading to use of uninitialized offset array and crashes.	15 years ago
Rich Felker	a113434cd6	major semaphore improvements (performance and correctness) 1. make sem_[timed]wait interruptible by signals, per POSIX 2. keep a waiter count in order to avoid unnecessary futex wake syscalls	15 years ago
Rich Felker	cd3bb38412	fix signal-based timers with null sigevent argument since timer_create is no longer allocating a structure for the timer_t and simply using the kernel timer id, it was impossible to specify the timer_t as the argument to the signal handler. the solution is to pass the null sigevent pointer on to the kernel, rather than filling it in userspace, so that the kernel does the right thing. however, that precludes the clever timerid-versus-threadid encoding we were doing. instead, just assume timerids are below 1M and thread pointers are above 1M. (in perspective: timerids are sequentially allocated and seem limited to 32k, and thread pointers are at roughly 3G.)	15 years ago
Rich Felker	104d013441	fix incorrect (and conflicting on LP64 archs) types for sysv ipc msgq functions	15 years ago
Rich Felker	fc0cf2852d	fix (hopefully) statvfs breakage on x86_64 that resulted from fixing i386...	15 years ago
Rich Felker	59a37f8f1f	document more changes	15 years ago
Rich Felker	729cb49f52	new framework to inhibit thread cancellation when needed with these small changes, libc functions which need to call functions which are cancellation points, but which themselves must not be cancellation points, can use the CANCELPT_INHIBIT and CANCELPT_RESUME macros to temporarily inhibit all cancellation.	15 years ago
Rich Felker	918a40f257	add ip6 pktinfo stuff for x86_64 these defs should probably all be moved out of bits and unified...	15 years ago
Rich Felker	8bb82b4e58	add sysv ipc message queues (completely untested)	15 years ago
Rich Felker	0438e9fd63	getopt.h is a GNU-getopt-specific header. always expose GNU functions.	15 years ago
Rich Felker	5788d97221	add sysexits.h legacy header	15 years ago
Rich Felker	f209440bcf	implement the adjtime and adjtimex functions (nonstandard)	15 years ago
Rich Felker	2c4e9e6e4b	add getmntent_r interface (all of mntent is nonstandard anyway)	15 years ago
Rich Felker	e86cc888df	add some missing ipv6 stuff	15 years ago
Rich Felker	92b2eb8d03	implement if_indextoname and if_nametoindex functions	15 years ago
Rich Felker	ef8b4b1aa6	add (nonstandard) cfmakeraw function	15 years ago
Rich Felker	5546f7a73a	add pivot_root syscall wrapper	15 years ago
Rich Felker	e72180083e	add more legacy functions: setlinebuf and setbuffer	15 years ago
Rich Felker	8b61c81693	alternate name for syslog.h	15 years ago
Rich Felker	f93de08ca4	uncomment IP_PKTINFO this was a hack leftover from testing before the initial check-in to git.	15 years ago
Rich Felker	39e48531ef	support the nonstandard err.h interfaces note that unlike the originals, these do not print the program name/argv[0] because we have not saved it anywhere. this could be changed in __libc_start_main if desired.	15 years ago
Rich Felker	25ce7621e0	release notes for next bugfix release	15 years ago
Rich Felker	16675df793	fix misaligned read on early string termination in strchr this could actually cause rare crashes in the case where a short string is located at the end of a page and the following page is not readable, and in fact this was seen in gcc compiling certain files.	15 years ago
Rich Felker	2f3d02cd83	fix overflow in printf %N$ argument handling	15 years ago
Rich Felker	f9569662c0	fix various floating point rounding and formatting errors in *printf	15 years ago
Rich Felker	bd1f6eba8c	release notes for 0.7.6 bugfix release	15 years ago
Rich Felker	b761bd19aa	fix rare but nasty under-allocation bug in malloc with large requests the bug appeared only with requests roughly 2sizeof(size_t) to 4sizeof(size_t) bytes smaller than a multiple of the page size, and only for requests large enough to be serviced by mmap instead of the normal heap. it was only ever observed on 64-bit machines but presumably could also affect 32-bit (albeit with a smaller window of opportunity).	15 years ago
Rich Felker	98c5583ad5	simplify vdprintf implementation greatly based on recent vfprintf changes since vfprintf will provide a temporary buffer in the case where the target FILE has a zero buffer size, don't bother setting up a real buffer for vdprintf. this also allows us to skip the call to fflush since we know everything will be written out before vfprintf returns.	15 years ago
Rich Felker	bd57e2b43a	use a local temp buffer for unbuffered streams in vfprintf this change makes it so most calls to fprintf(stderr, ...) will result in a single writev syscall, as opposed to roughly 2*N syscalls (and possibly more) where N is the number of format specifiers. in principle we could use a much larger buffer, but it's best not to increase the stack requirements too much. most messages are under 80 chars.	15 years ago
Rich Felker	5600088d38	fix nl_langinfo to actually use the existing, correct internal version	15 years ago
Rich Felker	3910e93340	make ualarm actually work (obsolete function removed from SUS)	15 years ago
Rich Felker	e898a79053	fix various bugs in strtold: 0e10000000000000000000000000000000 was setting ERANGE exponent char e/p was considered part of the match even if not followed by a valid decimal value "1e +10" was parsed as "1e+10" hex digits were misinterpreted as 0..5 instead of 10..15	15 years ago
Rich Felker	c68b26369e	fix serious bug in strchr - char signedness search for bytes with high bit set was giving (potentially dangerous) wrong results. i've tested, cleaned up, and hopefully sped up this function now.	15 years ago
Rich Felker	2155afd73e	prototype getdtablesize (nonstandard function)	15 years ago
Rich Felker	1db283bf19	add setresuid/setresgid functions (nonstandard)	15 years ago
Rich Felker	7fd3995282	pthread_create need not set errno	15 years ago
Rich Felker	7e795ca7ed	fix statvfs syscalls (missing size argument)	15 years ago
Rich Felker	66def4e776	block all signals during rsyscall otherwise a signal handler could see an inconsistent and nonconformant program state where different threads have different uids/gids.	15 years ago
Rich Felker	1ad049b7b6	fix race condition in rsyscall handler the problem: there is a (single-instruction) race condition window between a thread flagging itself dead and decrementing itself from the thread count. if it receives the rsyscall signal at this exact moment, the rsyscall caller will never succeed in signalling enough flags to succeed, and will deadlock forever. in previous versions of musl, the about-to-terminate thread masked all signals prior to decrementing the thread count, but this cost a whole syscall just to account for extremely rare races. the solution is a huge hack: rather than blocking in the signal handler if the thread is dead, modify the signal mask of the saved context and return in order to prevent further signal handling by the dead thread. this allows the dead thread to continue decrementing the thread count (if it had not yet done so) and exiting, even while the live part of the program blocks for rsyscall.	15 years ago
Rich Felker	c9b2d8016f	don't trust siginfo in rsyscall handler for some inexplicable reason, linux allows the sender of realtime signals to spoof its identity. permission checks for sending signals should limit the impact to same-user processes, but just to be safe, we avoid trusting the siginfo structure and instead simply examine the program state to see if we're in the middle of a legitimate rsyscall.	15 years ago
Rich Felker	6e9ed66d0d	timer threads should sleep and stay asleep... a long time	15 years ago

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311 Commits (b2486a8922bf4977bd82c8190258e39de28c053b) All Branches Search

311 Commits (b2486a8922bf4977bd82c8190258e39de28c053b)

All Branches