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NoryiE
2025-02-16 14:12:49 +00:00
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#
# Risc-V Assembler program to print "Hello World!"
# to stdout.
#
# a0-a2 - parameters to linux function services
# a7 - linux function number
#
.global _start # Provide program starting address to linker
# Setup the parameters to print hello world
# and then call Linux to do it.
_start: addi a0, x0, 1 # 1 = StdOut
la a1, helloworld # load address of helloworld
addi a2, x0, 13 # length of our string
addi a7, x0, 64 # linux write system call
ecall # Call linux to output the string
# Setup the parameters to exit the program
# and then call Linux to do it.
addi a0, x0, 0 # Use 0 return code
addi a7, x0, 93 # Service command code 93 terminates
ecall # Call linux to terminate the program
.data
helloworld: .ascii "Hello World!\n"
# From https://smist08.wordpress.com/2019/09/07/risc-v-assembly-language-hello-world/