1993-06-12 14:58:17 +00:00
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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1993-10-08 20:51:00 +00:00
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* from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
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Mega-commit for Linux emulator update.. This has been stress tested under
netscape-2.0 for Linux running all the Java stuff. The scrollbars are now
working, at least on my machine. (whew! :-)
I'm uncomfortable with the size of this commit, but it's too
inter-dependant to easily seperate out.
The main changes:
COMPAT_LINUX is *GONE*. Most of the code has been moved out of the i386
machine dependent section into the linux emulator itself. The int 0x80
syscall code was almost identical to the lcall 7,0 code and a minor tweak
allows them to both be used with the same C code. All kernels can now
just modload the lkm and it'll DTRT without having to rebuild the kernel
first. Like IBCS2, you can statically compile it in with "options LINUX".
A pile of new syscalls implemented, including getdents(), llseek(),
readv(), writev(), msync(), personality(). The Linux-ELF libraries want
to use some of these.
linux_select() now obeys Linux semantics, ie: returns the time remaining
of the timeout value rather than leaving it the original value.
Quite a few bugs removed, including incorrect arguments being used in
syscalls.. eg: mixups between passing the sigset as an int, vs passing
it as a pointer and doing a copyin(), missing return values, unhandled
cases, SIOC* ioctls, etc.
The build for the code has changed. i386/conf/files now knows how
to build linux_genassym and generate linux_assym.h on the fly.
Supporting changes elsewhere in the kernel:
The user-mode signal trampoline has moved from the U area to immediately
below the top of the stack (below PS_STRINGS). This allows the different
binary emulations to have their own signal trampoline code (which gets rid
of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so
that the emulator can provide the exact "struct sigcontext *" argument to
the program's signal handlers.
The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which
have the same values as the re-used SA_DISABLE and SA_ONSTACK which are
intended for sigaction only. This enables the support of a SA_RESETHAND
flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal
semantics where the signal handler is reset when it's triggered.
makesyscalls.sh no longer appends the struct sysentvec on the end of the
generated init_sysent.c code. It's a lot saner to have it in a seperate
file rather than trying to update the structure inside the awk script. :-)
At exec time, the dozen bytes or so of signal trampoline code are copied
to the top of the user's stack, rather than obtaining the trampoline code
the old way by getting a clone of the parent's user area. This allows
Linux and native binaries to freely exec each other without getting
trampolines mixed up.
1996-03-02 19:38:20 +00:00
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* $Id: pcb.h,v 1.10 1996/01/23 02:39:24 davidg Exp $
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1993-06-12 14:58:17 +00:00
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*/
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1993-10-08 20:51:00 +00:00
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#ifndef _I386_PCB_H_
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#define _I386_PCB_H_
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1993-06-12 14:58:17 +00:00
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/*
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* Intel 386 process control block
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*/
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1994-08-13 03:50:34 +00:00
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#include <machine/tss.h>
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#include <machine/npx.h>
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1993-06-12 14:58:17 +00:00
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struct pcb {
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struct i386tss pcb_tss;
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#define pcb_ksp pcb_tss.tss_esp0
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#define pcb_ptd pcb_tss.tss_cr3
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#define pcb_cr3 pcb_ptd
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#define pcb_pc pcb_tss.tss_eip
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#define pcb_psl pcb_tss.tss_eflags
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#define pcb_usp pcb_tss.tss_esp
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#define pcb_fp pcb_tss.tss_ebp
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#ifdef notyet
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u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
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#endif
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1993-10-08 20:51:00 +00:00
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caddr_t pcb_ldt; /* per process (user) LDT */
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int pcb_ldt_len; /* number of LDT entries */
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1993-06-12 14:58:17 +00:00
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struct save87 pcb_savefpu; /* floating point state for 287/387 */
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/*
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* Software pcb (extension)
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*/
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1995-08-17 11:30:03 +00:00
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u_char pcb_flags;
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#define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
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1994-12-03 10:03:19 +00:00
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u_char pcb_inl; /* intr_nesting_level at context switch */
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1993-06-12 14:58:17 +00:00
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caddr_t pcb_onfault; /* copyin/out fault recovery */
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};
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1994-05-25 09:21:21 +00:00
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/*
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* The pcb is augmented with machine-dependent additional data for
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* core dumps. For the i386: ???
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*/
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struct md_coredump {
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};
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1993-06-12 14:58:17 +00:00
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#ifdef KERNEL
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1993-11-07 17:43:17 +00:00
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extern struct pcb *curpcb; /* our current running pcb */
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1996-01-23 02:39:24 +00:00
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int savectx __P((struct pcb*));
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1993-06-12 14:58:17 +00:00
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#endif
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1993-10-08 20:51:00 +00:00
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#endif /* _I386_PCB_H_ */
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