38 lines
912 B
ArmAsm
38 lines
912 B
ArmAsm
#PURPOSE: Simple program that exits and returns a
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# status code back to the Linux kernel
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#
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#INPUT: none
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#
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#OUTPUT: returns a status code This can be viewed
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# by typing
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#
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# echo $?
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#
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# after running the program
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#
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#VARIABLES:
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# %rax holds the system call number
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# %rbx holds the return status
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#
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.section .data
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.section .text
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.globl _start
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_start:
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mov $1, %rax # this is the linux kernel command
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# number (system call) for exiting
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# $ means immediate mode addressing,
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# without $ it defaults to direct
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# mode, looking up a number in
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# address 1
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mov $0, %rbx # this is the status number we will
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# return to the OS
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int $0x80 # this wakes up the kernel to run the
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# exit command
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