Augustin Cavalier
4c76039f6f
This reverts most ofc7360f4b02. Unlike the other floating-point registers, these values are callee-saved (see "System V Application Binary Interface, AMD64 Architecture Supplement" section 3.2.1.) So we need to preserve their values and not reset defaults on context switch. EMMS, as the previous changes used, does not suffice to clear exceptions. We could use FNCLEX instead, but we need to reset x87 state on context switch anyway, so use FNINIT. Do not reinstate FNCLEX in the exception handler since it will be executed on context switch anyway. We also need to ensure a clean initial state, so take care of that in arch_thread_init. See also: * remarks in396b74228e* as well as53e2dc0f85Fixes #19454 and #18624. Doesn't regress #18656 and #19063. Doesn't seem to affect #19450. Change-Id: I7179f1ec7304e7aed09ff80f6773e53d5dbdf5f9 Reviewed-on: https://review.haiku-os.org/c/haiku/+/9081 Reviewed-by: Jérôme Duval <[email protected]> Tested-by: Commit checker robot <[email protected]> Reviewed-by: waddlesplash <[email protected]>
Haiku
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Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
Goals
- Sensible defaults with minimal configuration required.
- Clean, clear, concise code.
- Unified desktop environment.
Trying Haiku
Haiku provides pre-built nightly images and release images. Haiku is compatible with a large variety of hardware, but in case you don't want to "take the plunge" and install Haiku on bare metal, you can install it on a virtual machine (VM) instead. If you've never used a VM before, you can follow one of the "Emulating Haiku" guides.
Compiling Haiku
See ReadMe.Compiling.
Contributing
Haiku is a meritocratic open source project with a large variety of tasks. Even if you can't write code, you can still help! Haiku needs designers, (technical) writers, translators, testers... Get involved and help out!
Contributing code
If you're submitting a patch to us, please make sure you're following the patch submitting guidelines.
If you're having trouble finding something in the source tree, you can use one of our web-based source code browsers:
- https://grok.nikisoft.one/opengrok/ (OpenGrok, provided by Niklas Poslovski)
- https://git.haiku-os.org/ (git, provided by Haiku, Inc.)
Contributing documentation
The main piece of documentation that still needs work are the API docs (found
in the tree at docs/user). Just find an undocumented class, write
documentation for it, and submit a patch.
Contributing translations
See wiki:i18n.
Contributing software ports
See HaikuPorts.
Contributing to our infrastructure
See Infrastructure.