afa8862328
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.
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*
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* Copyright (c) 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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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* @(#)signal.h 8.1 (Berkeley) 6/11/93
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* $FreeBSD$
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*/
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#ifndef _MACHINE_SIGNAL_H_
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#define _MACHINE_SIGNAL_H_
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#include <sys/cdefs.h>
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#include <sys/_sigset.h>
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/*
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* Machine-dependent signal definitions
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*/
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typedef long sig_atomic_t;
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#if __XSI_VISIBLE
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/*
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* Minimum signal stack size. The current signal frame
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* for i386 is 408 bytes large.
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*/
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#define MINSIGSTKSZ (512 * 4)
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#endif
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#if __BSD_VISIBLE
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#include <machine/trap.h> /* codes for SIGILL, SIGFPE */
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/*
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* Only the kernel should need these old type definitions.
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*/
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/*
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* Information pushed on stack when a signal is delivered.
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* This is used by the kernel to restore state following
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* execution of the signal handler. It is also made available
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* to the handler to allow it to restore state properly if
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* a non-standard exit is performed.
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*/
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/*
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* The sequence of the fields/registers in struct sigcontext should match
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* those in mcontext_t.
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*/
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struct sigcontext {
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struct __sigset sc_mask; /* signal mask to restore */
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long sc_onstack; /* sigstack state to restore */
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long sc_r15; /* machine state (struct trapframe) */
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long sc_r14;
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long sc_r13;
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long sc_r12;
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long sc_r11;
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long sc_r10;
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long sc_r9;
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long sc_r8;
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long sc_rdi;
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long sc_rsi;
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long sc_rbp;
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long sc_rbx;
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long sc_rdx;
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long sc_rcx;
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long sc_rax;
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long sc_trapno;
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long sc_err;
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long sc_rip;
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long sc_cs;
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long sc_rflags;
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long sc_rsp;
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long sc_ss;
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long sc_len; /* sizeof(mcontext_t) */
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/*
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* XXX - See <machine/ucontext.h> and <machine/npx.h> for
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* the following fields.
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*/
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long sc_fpformat;
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long sc_ownedfp;
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long sc_spare1[1];
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long sc_fpstate[128] __aligned(16);
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long sc_spare2[8];
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};
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#endif /* __BSD_VISIBLE */
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#endif /* !_MACHINE_SIGNAL_H_ */
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