FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F5.2.0 2003-10-23T06:06:14Z 2003-10-23T06:06:14Z Peter Wemm peter@FreeBSD.org 2003-10-23T06:06:14Z urn:sha1:63f2bb5ff17d83ea018c6c9bbc980651d6e31add 2003-10-23T05:31:23Z Peter Wemm peter@FreeBSD.org 2003-10-23T05:31:23Z urn:sha1:c0432d033e292851f0925e9fbd81cc36b9248688 implement i386 compat numbers where it makes sense. This would save a syscall translation layer. Yes, this breaks the abi slightly again, but fortunately its just a recompile rather than tweaking the source. I will be fixing the libc stubs while I'm here. 2003-05-12T02:37:29Z Peter Wemm peter@FreeBSD.org 2003-05-12T02:37:29Z urn:sha1:bf1e897425bc2ec1bea8b4a3b09e2b89bbfeb58f value on entry and exit. This isn't as easy as it sounds because when we recursively trap or interrupt, we have to avoid duplicating the swapgs instruction or we end up back with the userland %gs. I implemented this by testing TF_CS to see if we're coming from supervisor mode already, and check for returning to supervisor. To avoid a race with interrupts in the brief period after beginning executing the handler and before the swapgs, convert all trap gates to interrupt gates, and reenable interrupts immediately after the swapgs. I am not happy with this. There are other possible ways to do this that should be investigated. (eg: storing the GS.base MSR value in the trapframe) Add some sysarch functions to let the userland code get to this. Approved by: re (blanket amd64/*) 2003-05-01T01:05:25Z Peter Wemm peter@FreeBSD.org 2003-05-01T01:05:25Z urn:sha1:afa8862328041298fe0c059d65cea406f92bad4b a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt. 2002-09-28T20:42:04Z Peter Wemm peter@FreeBSD.org 2002-09-28T20:42:04Z urn:sha1:feea0ab05b97f41e7b7ff0be021c8e8d126db6cc 2002-03-20T05:48:58Z Alfred Perlstein alfred@FreeBSD.org 2002-03-20T05:48:58Z urn:sha1:b63dc6ad473b82b196386d0c3dcbd1056cea81df 2002-02-03T11:21:22Z Mark Murray markm@FreeBSD.org 2002-02-03T11:21:22Z urn:sha1:9a29e3250ddbdb3a2b6187c77f77bf42be1ada9c names from some prototypes. (Other prototypes here already have these removed). 2000-09-21T17:07:27Z Brian S. Dean bsd@FreeBSD.org 2000-09-21T17:07:27Z urn:sha1:9d90941a83120e31a1000ded6e1231c521c0f5ba and clearing watchpoints. Reviewed by: jwd@FreeBSD.org, -hackers@ 1999-12-29T04:46:21Z Peter Wemm peter@FreeBSD.org 1999-12-29T04:46:21Z urn:sha1:664a31e4967a61ec61870f45adc2f1400617993e is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come. 1999-09-02T20:59:50Z Luoqi Chen luoqi@FreeBSD.org 1999-09-02T20:59:50Z urn:sha1:7a2bb3b800667397d41ad7324c4d8f2911fb8ebb 1. Move definitions of struct i386_*_args to the header file sysarch.h, since they are part of the sysarch API. struct i386_get_ldt_args and i386_set_ldt_args were identical, therefore make them into one struct i386_ldt_args. Libc should use these definitions as well. 2. Return a more sensible EOPNOTSUPP for unknown operations. Reviewed by: marcel