856e1fc1ad
Also remove all calls to memcpy in favor of memmove, which has defined semantics when the ranges overlap. The fact that memcpy was working in console.c to scroll the screen is not guaranteed by all implementations.
41 lines
856 B
ArmAsm
41 lines
856 B
ArmAsm
#include "mmu.h"
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.text
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.globl trap
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.globl trapret1
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.globl alltraps
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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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/*
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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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.globl trapret
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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 forkret1
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forkret1:
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movl 4(%esp), %esp
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jmp trapret
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.globl acpu
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acpu:
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.long 0
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