rt-thread-official/libcpu/ia32/trapisr_gcc.S

/*
 * Copyright (c) 2006-2022, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-09-15     QiuYi        The first version.
 */

/**
 * @addtogroup I386
 */
/*@{*/

#define ENTRY(proc)\
    .align 2;\
    .globl proc;\
    .type proc,@function;\
    proc:

#define TRAPFNC(name,num)\
    ENTRY(name)\
    pushl $(num);\
    jmp _traps;\
    .data;\
    .long name;\
    .text

#define TRAPFNC_NOEC(name,num)\
    ENTRY(name)\
    pushl $0;\
    pushl $(num);\
    jmp _traps;\
    .data;\
    .long name;\
    .text

.globl trap_func
    .data
    .align 4
    .type trap_func,@object
    trap_func :
.text

/* CPU traps */
TRAPFNC_NOEC(Xdivide, 0)
TRAPFNC_NOEC(Xdebug,  1)
TRAPFNC_NOEC(Xnmi,    2)
TRAPFNC_NOEC(Xbrkpt,  3)
TRAPFNC_NOEC(Xoflow,  4)
TRAPFNC_NOEC(Xbound,  5)
TRAPFNC_NOEC(Xillop,  6)
TRAPFNC_NOEC(Xdevice, 7)
TRAPFNC (Xdblflt, 8)
TRAPFNC (Xtss,    9)
TRAPFNC (Xsegnp,  10)
TRAPFNC (Xstack,  11)
TRAPFNC (Xgpflt,  12)
TRAPFNC (Xpgflt,  13)
TRAPFNC_NOEC(Xfperr,  14)
TRAPFNC (Xalign,  15)

/* default handler -- not for any specific trap */
TRAPFNC (Xdefault, 500)

.p2align 4,0x90
.globl  _traps
.type   _traps,@function
.globl rt_interrupt_enter
.globl rt_interrupt_leave

_traps:
    push %ds
    push %es
    pushal
    movw $0x10,%ax
    movw %ax,%ds
    movw %ax,%es
    pushl %esp
    call rt_interrupt_enter
    movl %esp, %eax
    addl $0x2c,%eax     /*get trapno*/
    movl (%eax),%eax
    pushl %eax          /*push trapno*/
    call rt_hw_trap_irq
    addl $4,%esp
    call rt_interrupt_leave
    popl %esp
    popal
    pop %es
    pop %ds
    add $8,%esp
    iret

/*@}*/