mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-27 08:00:11 +00:00
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 -*- */
|
|
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 1993 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_ASMACROS_H_
|
|
#define _MACHINE_ASMACROS_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
/* XXX too much duplication in various asm*.h's. */
|
|
|
|
/*
|
|
* CNAME is used to manage the relationship between symbol names in C
|
|
* and the equivalent assembly language names. CNAME is given a name as
|
|
* it would be used in a C program. It expands to the equivalent assembly
|
|
* language name.
|
|
*/
|
|
#define CNAME(csym) csym
|
|
|
|
#define ALIGN_DATA .p2align 2 /* 4 byte alignment, zero filled */
|
|
#define ALIGN_TEXT .p2align 2,0x90 /* 4-byte alignment, nop filled */
|
|
#define SUPERALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
|
|
|
|
#define GEN_ENTRY(name) ALIGN_TEXT; .globl CNAME(name); \
|
|
.type CNAME(name),@function; CNAME(name):
|
|
#define ENTRY(name) GEN_ENTRY(name)
|
|
#define ALTENTRY(name) GEN_ENTRY(name)
|
|
#define END(name) .size name, . - name
|
|
|
|
#ifdef LOCORE
|
|
|
|
#define GSEL_KPL 0x0020 /* GSEL(GCODE_SEL, SEL_KPL) */
|
|
#define SEL_RPL_MASK 0x0003
|
|
|
|
/*
|
|
* Convenience macro for declaring interrupt entry points.
|
|
*/
|
|
#define IDTVEC(name) ALIGN_TEXT; .globl __CONCAT(X,name); \
|
|
.type __CONCAT(X,name),@function; __CONCAT(X,name):
|
|
|
|
/*
|
|
* Macros to create and destroy a trap frame.
|
|
*/
|
|
.macro PUSH_FRAME2
|
|
pushal
|
|
pushl $0
|
|
movw %ds,(%esp)
|
|
pushl $0
|
|
movw %es,(%esp)
|
|
pushl $0
|
|
movw %fs,(%esp)
|
|
movl %esp,%ebp
|
|
.endm
|
|
|
|
.macro PUSH_FRAME
|
|
pushl $0 /* dummy error code */
|
|
pushl $0 /* dummy trap type */
|
|
PUSH_FRAME2
|
|
.endm
|
|
|
|
/*
|
|
* Access per-CPU data.
|
|
*/
|
|
#define PCPU(member) %fs:PC_ ## member
|
|
|
|
#define PCPU_ADDR(member, reg) \
|
|
movl %fs:PC_PRVSPACE, reg ; \
|
|
addl $PC_ ## member, reg
|
|
|
|
/*
|
|
* Setup the kernel segment registers.
|
|
*/
|
|
.macro SET_KERNEL_SREGS
|
|
movl $KDSEL, %eax /* reload with kernel's data segment */
|
|
movl %eax, %ds
|
|
movl %eax, %es
|
|
movl $KPSEL, %eax /* reload with per-CPU data segment */
|
|
movl %eax, %fs
|
|
.endm
|
|
|
|
.macro NMOVE_STACKS
|
|
movl PCPU(KESP0), %edx
|
|
movl $TF_SZ, %ecx
|
|
testl $PSL_VM, TF_EFLAGS(%esp)
|
|
jz .L\@.1
|
|
addl $VM86_STACK_SPACE, %ecx
|
|
.L\@.1: subl %ecx, %edx
|
|
movl %edx, %edi
|
|
movl %esp, %esi
|
|
rep; movsb
|
|
movl %edx, %esp
|
|
.endm
|
|
|
|
.macro LOAD_KCR3
|
|
call .L\@.1
|
|
.L\@.1: popl %eax
|
|
movl (tramp_idleptd - .L\@.1)(%eax), %eax
|
|
movl %eax, %cr3
|
|
.endm
|
|
|
|
.macro MOVE_STACKS
|
|
LOAD_KCR3
|
|
NMOVE_STACKS
|
|
.endm
|
|
|
|
.macro KENTER
|
|
testl $PSL_VM, TF_EFLAGS(%esp)
|
|
jz .L\@.1
|
|
LOAD_KCR3
|
|
movl PCPU(CURPCB), %eax
|
|
testl $PCB_VM86CALL, PCB_FLAGS(%eax)
|
|
jnz .L\@.3
|
|
NMOVE_STACKS
|
|
movl $handle_ibrs_entry,%edx
|
|
call *%edx
|
|
jmp .L\@.3
|
|
.L\@.1: testb $SEL_RPL_MASK, TF_CS(%esp)
|
|
jz .L\@.3
|
|
.L\@.2: MOVE_STACKS
|
|
movl $handle_ibrs_entry,%edx
|
|
call *%edx
|
|
.L\@.3:
|
|
.endm
|
|
|
|
#endif /* LOCORE */
|
|
|
|
#ifdef __STDC__
|
|
#define ELFNOTE(name, type, desctype, descdata...) \
|
|
.pushsection .note.name ; \
|
|
.align 4 ; \
|
|
.long 2f - 1f /* namesz */ ; \
|
|
.long 4f - 3f /* descsz */ ; \
|
|
.long type ; \
|
|
1:.asciz #name ; \
|
|
2:.align 4 ; \
|
|
3:desctype descdata ; \
|
|
4:.align 4 ; \
|
|
.popsection
|
|
#else /* !__STDC__, i.e. -traditional */
|
|
#define ELFNOTE(name, type, desctype, descdata) \
|
|
.pushsection .note.name ; \
|
|
.align 4 ; \
|
|
.long 2f - 1f /* namesz */ ; \
|
|
.long 4f - 3f /* descsz */ ; \
|
|
.long type ; \
|
|
1:.asciz "name" ; \
|
|
2:.align 4 ; \
|
|
3:desctype descdata ; \
|
|
4:.align 4 ; \
|
|
.popsection
|
|
#endif /* __STDC__ */
|
|
|
|
#endif /* !_MACHINE_ASMACROS_H_ */
|