xv6-65oo2/trapasm.S

33 lines
486 B
ArmAsm

#include "mmu.h"
# vectors.S sends all traps here.
.globl alltraps
alltraps:
# Build trap frame.
pushl %ds
pushl %es
pushl %fs
pushl %gs
pushal
# Set up data segments.
movw $(SEG_KDATA<<3), %ax
movw %ax, %ds
movw %ax, %es
# Call trap(tf), where tf=%esp
pushl %esp
call trap
addl $4, %esp
# Return falls through to trapret...
.globl trapret
trapret:
popal
popl %gs
popl %fs
popl %es
popl %ds
addl $0x8, %esp # trapno and errcode
iret