38 lines
704 B
ArmAsm
38 lines
704 B
ArmAsm
.text
|
|
.globl trap
|
|
.globl trapret1
|
|
|
|
.globl alltraps
|
|
alltraps:
|
|
/* vectors.S sends all traps here */
|
|
pushl %ds # build
|
|
pushl %es # trap
|
|
pushal # frame
|
|
movl $16,%eax # SEG_KDATA << 3
|
|
movw %ax,%ds # kernel
|
|
movw %ax,%es # segments
|
|
pushl %esp # pass pointer to this trapframe
|
|
call trap # and call trap()
|
|
addl $4, %esp
|
|
# return falls through to trapret...
|
|
|
|
/*
|
|
* a forked process RETs here
|
|
* expects ESP to point to a Trapframe
|
|
*/
|
|
.globl trapret
|
|
trapret:
|
|
popal
|
|
popl %es
|
|
popl %ds
|
|
addl $0x8, %esp /* trapno and errcode */
|
|
iret
|
|
|
|
.globl forkret1
|
|
forkret1:
|
|
movl 4(%esp), %esp
|
|
jmp trapret
|
|
|
|
.globl acpu
|
|
acpu:
|
|
.long 0
|