The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/i386/include/asmacros.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /* -*- mode: asm -*- */
    2 /*-
    3  * SPDX-License-Identifier: BSD-3-Clause
    4  *
    5  * Copyright (c) 1993 The Regents of the University of California.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _MACHINE_ASMACROS_H_
   36 #define _MACHINE_ASMACROS_H_
   37 
   38 #include <sys/cdefs.h>
   39 
   40 /* XXX too much duplication in various asm*.h's. */
   41 
   42 /*
   43  * CNAME is used to manage the relationship between symbol names in C
   44  * and the equivalent assembly language names.  CNAME is given a name as
   45  * it would be used in a C program.  It expands to the equivalent assembly
   46  * language name.
   47  */
   48 #define CNAME(csym)             csym
   49 
   50 #define ALIGN_DATA      .p2align 2      /* 4 byte alignment, zero filled */
   51 #define ALIGN_TEXT      .p2align 2,0x90 /* 4-byte alignment, nop filled */
   52 #define SUPERALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
   53 
   54 #define GEN_ENTRY(name)         ALIGN_TEXT; .globl CNAME(name); \
   55                                 .type CNAME(name),@function; CNAME(name):
   56 #define ENTRY(name)             GEN_ENTRY(name)
   57 #define ALTENTRY(name)          GEN_ENTRY(name)
   58 #define END(name)               .size name, . - name
   59 
   60 #ifdef LOCORE
   61 
   62 #define GSEL_KPL        0x0020  /* GSEL(GCODE_SEL, SEL_KPL) */
   63 #define SEL_RPL_MASK    0x0003
   64 
   65 /*
   66  * Convenience macro for declaring interrupt entry points.
   67  */
   68 #define IDTVEC(name)    ALIGN_TEXT; .globl __CONCAT(X,name); \
   69                         .type __CONCAT(X,name),@function; __CONCAT(X,name):
   70 
   71 /*
   72  * Macros to create and destroy a trap frame.
   73  */
   74         .macro  PUSH_FRAME2
   75         pushal
   76         pushl   $0
   77         movw    %ds,(%esp)
   78         pushl   $0
   79         movw    %es,(%esp)
   80         pushl   $0
   81         movw    %fs,(%esp)
   82         movl    %esp,%ebp
   83         .endm
   84 
   85         .macro  PUSH_FRAME
   86         pushl   $0              /* dummy error code */
   87         pushl   $0              /* dummy trap type */
   88         PUSH_FRAME2
   89         .endm
   90 
   91 /*
   92  * Access per-CPU data.
   93  */
   94 #define PCPU(member)    %fs:PC_ ## member
   95 
   96 #define PCPU_ADDR(member, reg)                                          \
   97         movl %fs:PC_PRVSPACE, reg ;                                     \
   98         addl $PC_ ## member, reg
   99 
  100 /*
  101  * Setup the kernel segment registers.
  102  */
  103         .macro  SET_KERNEL_SREGS
  104         movl    $KDSEL, %eax    /* reload with kernel's data segment */
  105         movl    %eax, %ds
  106         movl    %eax, %es
  107         movl    $KPSEL, %eax    /* reload with per-CPU data segment */
  108         movl    %eax, %fs
  109         .endm
  110 
  111         .macro  NMOVE_STACKS
  112         movl    PCPU(KESP0), %edx
  113         movl    $TF_SZ, %ecx
  114         testl   $PSL_VM, TF_EFLAGS(%esp)
  115         jz      .L\@.1
  116         addl    $VM86_STACK_SPACE, %ecx
  117 .L\@.1: subl    %ecx, %edx
  118         movl    %edx, %edi
  119         movl    %esp, %esi
  120         rep; movsb
  121         movl    %edx, %esp
  122         .endm
  123 
  124         .macro  LOAD_KCR3
  125         call    .L\@.1
  126 .L\@.1: popl    %eax
  127         movl    (tramp_idleptd - .L\@.1)(%eax), %eax
  128         movl    %eax, %cr3
  129         .endm
  130 
  131         .macro  MOVE_STACKS
  132         LOAD_KCR3
  133         NMOVE_STACKS
  134         .endm
  135 
  136         .macro  KENTER
  137         testl   $PSL_VM, TF_EFLAGS(%esp)
  138         jz      .L\@.1
  139         LOAD_KCR3
  140         movl    PCPU(CURPCB), %eax
  141         testl   $PCB_VM86CALL, PCB_FLAGS(%eax)
  142         jnz     .L\@.3
  143         NMOVE_STACKS
  144         movl    $handle_ibrs_entry,%edx
  145         call    *%edx
  146         jmp     .L\@.3
  147 .L\@.1: testb   $SEL_RPL_MASK, TF_CS(%esp)
  148         jz      .L\@.3
  149 .L\@.2: MOVE_STACKS
  150         movl    $handle_ibrs_entry,%edx
  151         call    *%edx
  152 .L\@.3:
  153         .endm
  154 
  155 #endif /* LOCORE */
  156 
  157 #ifdef __STDC__
  158 #define ELFNOTE(name, type, desctype, descdata...) \
  159 .pushsection .note.name, "a", @note     ;       \
  160   .align 4                              ;       \
  161   .long 2f - 1f         /* namesz */    ;       \
  162   .long 4f - 3f         /* descsz */    ;       \
  163   .long type                            ;       \
  164 1:.asciz #name                          ;       \
  165 2:.align 4                              ;       \
  166 3:desctype descdata                     ;       \
  167 4:.align 4                              ;       \
  168 .popsection
  169 #else /* !__STDC__, i.e. -traditional */
  170 #define ELFNOTE(name, type, desctype, descdata) \
  171 .pushsection .note.name, "a", @note     ;       \
  172   .align 4                              ;       \
  173   .long 2f - 1f         /* namesz */    ;       \
  174   .long 4f - 3f         /* descsz */    ;       \
  175   .long type                            ;       \
  176 1:.asciz "name"                         ;       \
  177 2:.align 4                              ;       \
  178 3:desctype descdata                     ;       \
  179 4:.align 4                              ;       \
  180 .popsection
  181 #endif /* __STDC__ */
  182 
  183 #endif /* !_MACHINE_ASMACROS_H_ */

Cache object: 6247486cf3a347b4cfa3f82f61a1ed50


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.