Alek Ratzloff
551bd2c3f4
It makes sense to allow users to set the initial register values. This allows someone to e.g. enable interrupts once the VM has started, or set the initial stack pointer value. Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
53 lines
764 B
NASM
53 lines
764 B
NASM
.section code $0x0 {
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main:
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; Test divide by zero interrupts
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; div
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mov %status, $1
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mov %r0, $1
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div %r0, $0
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cmpeq (count), $1
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jz end
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; idiv
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mov %status, $2
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idiv %r0, $0
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cmpeq (count), $2
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jz end
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mov %status, $0
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end:
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halt
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.align u64
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divide_by_zero:
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add (count), $1
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iret
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.export main
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.export divide_by_zero
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}
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.section ivt $0x1000 {
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ivt:
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.interrupt $1, divide_by_zero
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.export ivt
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}
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.section shared $0x2000 {
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count: .u64 $0
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.export count
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}
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.section stack $0x4000 .. $0x5000 {
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stack_base:
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.export stack_base
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}
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.meta {
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ip: main
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flags: $0b100
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sp: stack_base
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ivt: ivt
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}
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