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On alpha, PAL is involved in context management and after wiring the CPU (in alpha_init()) a context switch was performed to tell PAL about the context. This was bogusly brought over to ia64 where it introduced bugs, because we restored the context from a mostly uninitialized PCB. The cleanup constitutes: o Remove the unused arguments from ia64_init(). o Don't return from ia64_init(), but instead call mi_startup() directly. This reduces the amount of muckery in assembly and also allows for the next bullet: o Save our currect context prior to calling mi_startup(). The reason for this is that many threads are created from thread0 by cloning the PCB. By saving our context in the PCB, we have something sane to clone. It also ensures that a cloned thread that does not alter the context in any way will return to the saved context, where we're ready for the eventuality with a nice, user unfriendly panic(). The cleanup fixes at least the following bugs: o Entering mi_startup() with the RSE in enforced lazy mode. o Re-execution of ia64_init() in certain "lab" conditions. While here, add proper unwind directives to __start() so that the unwind knows it has reached the bottom of the (call) stack. Approved by: re@ (blanket) |
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| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
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| secure | ||
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| sys | ||
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| usr.sbin | ||
| COPYRIGHT | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html