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

Commit Graph

Author	SHA1	Message	Date
Rich Felker	964e9f3c4c	avoid the thread-ptr-init behavior of sigaction when not installing handler this is necessary because posix_spawn calls sigaction after vfork, and if the thread pointer is not already initialized, initializing it in the child corrupts the parent process's state.	14 years ago
Rich Felker	400c5e5c83	use restrict everywhere it's required by c99 and/or posix 2008 to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.	14 years ago
Rich Felker	cd8d724516	remove unused var in new sigaction code	14 years ago
Rich Felker	fcaec912ed	changes to kernel sigaction struct handling in preparation for mips port	14 years ago
Rich Felker	dac084a4c5	work around "signal loses thread pointer" issue with "approach 2" this was discussed on the mailing list and no consensus on the preferred solution was reached, so in anticipation of a release, i'm just committing a minimally-invasive solution that avoids the problem by ensuring that multi-threaded-capable programs will always have initialized the thread pointer before any signal handler can run. in the long term we may switch to initializing the thread pointer at program start time whenever the program has the potential to access any per-thread data.	14 years ago
Rich Felker	99b8a25e94	overhaul implementation-internal signal protections the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sigset() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.	15 years ago
Rich Felker	016a5dc192	use a separate signal from SIGCANCEL for SIGEV_THREAD timers otherwise we cannot support an application's desire to use asynchronous cancellation within the callback function. this change also slightly debloats pthread_create.c.	15 years ago
Rich Felker	aa398f56fa	global cleanup to use the new syscall interface	15 years ago
Rich Felker	dc3776d445	fix previous commit that broke sigreturn. looks like the asm is needed.	15 years ago
Rich Felker	e1d8d25a50	fix omission that kept sa_restorer from being used	15 years ago
Rich Felker	0b44a0315b	initial check-in, version 0.5.0	15 years ago

11 Commits (835f9f950e2f6059532bd9ab9857a856ed21a4fd)