interrupt.c

来自「一个Windows下的Linux专用虚拟机」· C语言 代码 · 共 43 行

/*
 * This source code is a part of coLinux source package.
 *
 * Dan Aloni <[e-mail]>, 2003 (c)
 *
 * The code is licensed under the GPL. See the COPYING file at
 * the root directory.
 */

#include <colinux/arch/interrupt.h>

static void call_intr(void *func)
{
	asm("    call 1f"                            "\n" 
	    "1:  popl %%eax"                         "\n" 
	    "    addl $2f-1b,%%eax"                  "\n" 
	    "    pushfl"             /* flags */     "\n" 
	    "    pushl %%cs"         /* cs */        "\n" 
	    "    pushl %%eax"        /* eip (2:) */  "\n" 
	    "    jmp *%0"            /* jmp func */  "\n" 
	    "2:  sti"                                "\n" 
	    : : "m"(func): "eax", "esp");
}

void co_monitor_arch_real_hardware_interrupt(co_monitor_t *cmon)
{
	struct {
		unsigned long a, b;
	} *host;
	void *func;
	
	host = (typeof(host))(cmon->passage_page->host_state.idt.table);
	host = &host[co_passage_page->params[0]];
	func = (void *)((host->b & 0xffff0000) | (host->a & 0x0000ffff));
	
	call_intr(func);
}

void co_monitor_arch_enable_interrupts(void)
{
	asm("sti\n");
}