原始版本

RT_Thread/libcpu/ia32/trapisr_gcc.S

@@ -0,0 +1,96 @@
+/*
+ * 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
+
+/*@}*/