wireguard-openbsd/lib/libc/arch/arm, branch master WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/lib/libc/arch/arm?h=master 2020-10-19T17:57:40Z replace ad-hoc illegal instruction with the architecturally defined one 2020-10-19T17:57:40Z naddy naddy@openbsd.org 2020-10-19T17:57:40Z urn:sha1:5bbf88322ed6a7a68da69a643f5f3b793160f0cd ("permanently undefined") ok deraadt@ kettenis@ SYS___threxit cannot fail, but this integration looks like a gadget. 2020-10-18T14:28:16Z deraadt deraadt@openbsd.org 2020-10-18T14:28:16Z urn:sha1:13df69822c46036ceeeafb612b360459feebf6db Put a hard-trap instruction after the syscall instruction. ok kettenis mortimer Add support for timeconting in userland. 2020-07-06T13:33:05Z pirofti pirofti@openbsd.org 2020-07-06T13:33:05Z urn:sha1:d82e6535c6efd8305182f77041b2246ccfae1196 This diff exposes parts of clock_gettime(2) and gettimeofday(2) to userland via libc eliberating processes from the need for a context switch everytime they want to count the passage of time. If a timecounter clock can be exposed to userland than it needs to set its tc_user member to a non-zero value. Tested with one or multiple counters per architecture. The timing data is shared through a pointer found in the new ELF auxiliary vector AUX_openbsd_timekeep containing timehands information that is frequently updated by the kernel. Timing differences between the last kernel update and the current time are adjusted in userland by the tc_get_timecount() function inside the MD usertc.c file. This permits a much more responsive environment, quite visible in browsers, office programs and gaming (apparently one is are able to fly in Minecraft now). Tested by robert@, sthen@, naddy@, kmos@, phessler@, and many others! OK from at least kettenis@, cheloha@, naddy@, sthen@ Anthony Steinhauser reports that 32-bit arm cpus have the same speculation 2020-03-13T09:31:24Z deraadt deraadt@openbsd.org 2020-03-13T09:31:24Z urn:sha1:f74a2b77455090a00a6234c40c5f02aa52986a5b problems as 64-bit models. To resolve the syscall speculation, as a first step "nop; nop" was added after all occurances of the syscall ("swi 0") instruction. Then the kernel was changed to jump over the 2 extra instructions. In this final step, those pair of nops are converted into the speculation-blocking sequence ("dsb nsh; isb"). Don't try to build through these multiple steps, use a snapshot instead. Packages matching the new ABI will be out in a while... ok kettenis Anthony Steinhauser reports that 32-bit arm cpus have the same speculation 2020-03-11T12:53:19Z deraadt deraadt@openbsd.org 2020-03-11T12:53:19Z urn:sha1:f377c7672bd38a70b428cd7751ceff0af609e750 problems as 64-bit models. For the syscall instruction issue, add nop;nop after swi 0, in preparation for jumping over a speculation barrier here later. ok kettenis Mark as 'protected' all the routines from the quad/ and softfloat/ subdirs, 2019-11-10T22:23:28Z guenther guenther@openbsd.org 2019-11-10T22:23:28Z urn:sha1:00b6e344ba691d3d76ced8394494ab6d26b6766c as well as those in arch/arm/gen/divsi3.S. This cleans up the PLTs on the 32bit archs. luna88k testing by aoyama@ "looks good" kettenis@, testing and ok deraadt@ Stop exporting the internal _mcount symbol as that's only referenced 2019-10-26T18:47:10Z guenther guenther@openbsd.org 2019-10-26T18:47:10Z urn:sha1:589b4acdbba65d6ecc6e77d9aac5e27618bc75fb by the ASM stub, which is also in libc. The compiler only generates invocations of the latter. ok mpi@ deraadt@ kettenis@ Save and restore the relevant FPU state on armv7. 2018-06-22T15:18:50Z kettenis kettenis@openbsd.org 2018-06-22T15:18:50Z urn:sha1:552f7563f1a8ac01e161ba76310b413ee23f9931 ok deraadt@ Clear the sign bit in the QNAN constants used by strtof, strtod and strtold, 2018-05-28T03:20:25Z jmatthew jmatthew@openbsd.org 2018-05-28T03:20:25Z urn:sha1:4f3262728f75ab09c39d31185a1ebdf9938b762e so passing "nan" and "-nan" produces a NaN with the right sign. Bug reported and diff provided by George Koehler. ok kettenis@ Drop memory barrier in _atomic_lock() implementation since the callers now 2018-05-17T20:28:32Z kettenis kettenis@openbsd.org 2018-05-17T20:28:32Z urn:sha1:a7720a9992916b369aecbf7f5386e0c41a6850a2 take care of this. ok visa@, mpi@