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.
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/*-
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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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* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FRAME_H_
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#define _MACHINE_FRAME_H_ 1
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/*
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* System stack frames.
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*/
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/*
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* Exception/Trap Stack Frame
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*
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* The ordering of this is specifically so that we can take first 6
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* the syscall arguments directly from the beginning of the frame.
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*/
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struct trapframe {
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register_t tf_rdi;
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register_t tf_rsi;
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register_t tf_rdx;
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register_t tf_rcx;
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register_t tf_r8;
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register_t tf_r9;
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register_t tf_rax;
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register_t tf_rbx;
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register_t tf_rbp;
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register_t tf_r10;
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register_t tf_r11;
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register_t tf_r12;
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register_t tf_r13;
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register_t tf_r14;
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register_t tf_r15;
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register_t tf_trapno;
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/* below portion defined in hardware */
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register_t tf_err;
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register_t tf_rip;
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register_t tf_cs;
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register_t tf_rflags;
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register_t tf_rsp;
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register_t tf_ss;
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};
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/* Interrupt stack frame */
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struct intrframe {
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register_t if_rdi;
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register_t if_rsi;
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register_t if_rdx;
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register_t if_rcx;
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register_t if_r8;
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register_t if_r9;
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register_t if_rax;
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register_t if_rbx;
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register_t if_rbp;
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register_t if_r10;
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register_t if_r11;
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register_t if_r12;
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register_t if_r13;
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register_t if_r14;
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register_t if_r15;
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register_t :64; /* compat with trap frame - trapno */
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register_t :64; /* compat with trap frame - err */
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/* below portion defined in hardware */
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register_t if_rip;
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register_t if_cs;
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register_t if_rflags;
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register_t if_rsp;
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register_t if_ss;
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};
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/* frame of clock (same as interrupt frame) */
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struct clockframe {
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register_t cf_rdi;
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register_t cf_rsi;
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register_t cf_rdx;
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register_t cf_rcx;
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register_t cf_r8;
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register_t cf_r9;
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register_t cf_rax;
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register_t cf_rbx;
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register_t cf_rbp;
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register_t cf_r10;
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register_t cf_r11;
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register_t cf_r12;
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register_t cf_r13;
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register_t cf_r14;
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register_t cf_r15;
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register_t :64; /* compat with trap frame - trapno */
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register_t :64; /* compat with trap frame - err */
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/* below portion defined in hardware */
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register_t cf_rip;
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register_t cf_cs;
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register_t cf_rflags;
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register_t cf_rsp;
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register_t cf_ss;
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};
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int kdb_trap(int, int, struct trapframe *);
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#endif /* _MACHINE_FRAME_H_ */
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