aa3ea612be
Reviewed by: jhb Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D29529
184 lines
5.3 KiB
C
184 lines
5.3 KiB
C
/* -*- mode: asm -*- */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1993 The Regents of the University of California.
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* 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. 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_ASMACROS_H_
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#define _MACHINE_ASMACROS_H_
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#include <sys/cdefs.h>
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/* XXX too much duplication in various asm*.h's. */
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/*
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* CNAME is used to manage the relationship between symbol names in C
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* and the equivalent assembly language names. CNAME is given a name as
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* it would be used in a C program. It expands to the equivalent assembly
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* language name.
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*/
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#define CNAME(csym) csym
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#define ALIGN_DATA .p2align 2 /* 4 byte alignment, zero filled */
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#define ALIGN_TEXT .p2align 2,0x90 /* 4-byte alignment, nop filled */
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#define SUPERALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
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#define GEN_ENTRY(name) ALIGN_TEXT; .globl CNAME(name); \
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.type CNAME(name),@function; CNAME(name):
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#define ENTRY(name) GEN_ENTRY(name)
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#define ALTENTRY(name) GEN_ENTRY(name)
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#define END(name) .size name, . - name
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#ifdef LOCORE
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#define GSEL_KPL 0x0020 /* GSEL(GCODE_SEL, SEL_KPL) */
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#define SEL_RPL_MASK 0x0003
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/*
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* Convenience macro for declaring interrupt entry points.
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*/
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#define IDTVEC(name) ALIGN_TEXT; .globl __CONCAT(X,name); \
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.type __CONCAT(X,name),@function; __CONCAT(X,name):
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/*
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* Macros to create and destroy a trap frame.
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*/
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.macro PUSH_FRAME2
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pushal
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pushl $0
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movw %ds,(%esp)
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pushl $0
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movw %es,(%esp)
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pushl $0
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movw %fs,(%esp)
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movl %esp,%ebp
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.endm
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.macro PUSH_FRAME
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pushl $0 /* dummy error code */
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pushl $0 /* dummy trap type */
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PUSH_FRAME2
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.endm
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/*
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* Access per-CPU data.
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*/
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#define PCPU(member) %fs:PC_ ## member
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#define PCPU_ADDR(member, reg) \
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movl %fs:PC_PRVSPACE, reg ; \
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addl $PC_ ## member, reg
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/*
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* Setup the kernel segment registers.
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*/
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.macro SET_KERNEL_SREGS
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movl $KDSEL, %eax /* reload with kernel's data segment */
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movl %eax, %ds
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movl %eax, %es
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movl $KPSEL, %eax /* reload with per-CPU data segment */
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movl %eax, %fs
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.endm
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.macro NMOVE_STACKS
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movl PCPU(KESP0), %edx
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movl $TF_SZ, %ecx
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testl $PSL_VM, TF_EFLAGS(%esp)
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jz .L\@.1
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addl $VM86_STACK_SPACE, %ecx
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.L\@.1: subl %ecx, %edx
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movl %edx, %edi
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movl %esp, %esi
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rep; movsb
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movl %edx, %esp
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.endm
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.macro LOAD_KCR3
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call .L\@.1
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.L\@.1: popl %eax
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movl (tramp_idleptd - .L\@.1)(%eax), %eax
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movl %eax, %cr3
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.endm
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.macro MOVE_STACKS
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LOAD_KCR3
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NMOVE_STACKS
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.endm
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.macro KENTER
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testl $PSL_VM, TF_EFLAGS(%esp)
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jz .L\@.1
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LOAD_KCR3
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movl PCPU(CURPCB), %eax
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testl $PCB_VM86CALL, PCB_FLAGS(%eax)
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jnz .L\@.3
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NMOVE_STACKS
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movl $handle_ibrs_entry,%edx
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call *%edx
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jmp .L\@.3
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.L\@.1: testb $SEL_RPL_MASK, TF_CS(%esp)
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jz .L\@.3
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.L\@.2: MOVE_STACKS
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movl $handle_ibrs_entry,%edx
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call *%edx
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.L\@.3:
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.endm
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#endif /* LOCORE */
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#ifdef __STDC__
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#define ELFNOTE(name, type, desctype, descdata...) \
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.pushsection .note.name ; \
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.align 4 ; \
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.long 2f - 1f /* namesz */ ; \
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.long 4f - 3f /* descsz */ ; \
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.long type ; \
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1:.asciz #name ; \
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2:.align 4 ; \
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3:desctype descdata ; \
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4:.align 4 ; \
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.popsection
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#else /* !__STDC__, i.e. -traditional */
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#define ELFNOTE(name, type, desctype, descdata) \
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.pushsection .note.name ; \
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.align 4 ; \
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.long 2f - 1f /* namesz */ ; \
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.long 4f - 3f /* descsz */ ; \
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.long type ; \
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1:.asciz "name" ; \
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2:.align 4 ; \
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3:desctype descdata ; \
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4:.align 4 ; \
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.popsection
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#endif /* __STDC__ */
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#endif /* !_MACHINE_ASMACROS_H_ */
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