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update hdisr_gcc.S: push argument for ISR. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2341 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
wuyangyong 2012-10-10 16:39:49 +00:00
parent 66c2e88566
commit 0057604ad2
1 changed files with 17 additions and 11 deletions
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18
libcpu/ia32/hdisr_gcc.S
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@ -73,14 +73,20 @@ _hdinterrupts:
movw %ax, %ds
movw %ax, %es
pushl %esp
call rt_interrupt_enter
movl %esp, %eax /* get irqno */
addl $0x2c, %eax
movl (%eax), %eax /* each item takes up 4bytes in isr_table,equl to isr_table[irqno] */
shll $0x2, %eax
movl $isr_table, %ebx
addl %eax,%ebx
movl %esp, %eax /* copy esp to eax */
addl $0x2c, %eax /* move to vector address */
movl (%eax), %eax /* vector(eax) = *eax */
pushl %eax /* push argument : int vector */
shll $0x2, %eax /* each item takes up 4bytes in isr_table. */
movl $isr_table, %ebx /* ebx = &isr_table[0] */
addl %eax, %ebx /* eax = &isr_table[vector] */
call *(%ebx)
add $4, %esp /* restore argument */
call rt_interrupt_leave
/* if rt_thread_switch_interrupt_flag set, jump to _interrupt_thread_switch and don't return */