34 lines
804 B
ArmAsm
34 lines
804 B
ArmAsm
#include "mmu.h"
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.text
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.globl alltraps
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.globl trap
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alltraps:
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/* vectors.S sends all traps here */
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pushl %ds # build
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pushl %es # trap
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pushal # frame
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movl $16,%eax # SEG_KDATA << 3
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movw %ax,%ds # kernel
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movw %ax,%es # segments
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pushl %esp # pass pointer to this trapframe
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call trap # and call trap()
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addl $4, %esp
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# return falls through to trapret...
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.globl trapret
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/*
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* a forked process RETs here
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* expects ESP to point to a Trapframe
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*/
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trapret:
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popal
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popl %es
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popl %ds
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addl $0x8, %esp /* trapno and errcode */
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iret
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.globl acpu
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acpu:
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.long 0
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