Can't compile Assembly aarch64. Need Help !

[Craglitch]

Hi community, i have problem with my termux when i compile assembly it's give me error message.

 .text

.global _start

_start:
        MOV R0, #86
        MOV R1, #29

SWI 0

Compile output using as command.

ASM.s: Assembler messages:
ASM.s:6: Error: operand 1 must be an integer register -- `mov R0,#86'
ASM.s:7: Error: operand 1 must be an integer register -- `mov R1,#29'
ASM.s:9: Error: unknown mnemonic `swi' -- `swi 0'

My lscpu output.

Application version:
0.118.0
Packages CPU architecture:
aarch64
Subscribed repositories:

sources.list

deb https://termux.astra.in.ua/apt/termux-main/ stable main

x11-repo (sources.list.d/x11.list)

deb https://packages.termux.org/apt/termux-x11 x11 main
Updatable packages:
apt/stable 2.4.1 aarch64 [upgradable from: 2.3.15-1]
cmake/stable 3.22.3 aarch64 [upgradable from: 3.22.1-1]
Android version:
8.1.0
Kernel build information:
Linux localhost 4.9.77+ #2 SMP PREEMPT Fri Mar 19 20:17:40 CST 2021 aarch64 Android
Device manufacturer:
OPPO
Device model:
CPH1909

Please help, thanks.

[ar664]

Could possibly be incorrect syntax.
The following code compiles with the current as:
https://github.com/odzhan/shellcode/tree/master/os/linux/arm64

[licy183]

It seems that your asm file is an arm32 one.
Currently, binutils in the main repo doen't support cross compile, so you can try to use as on an arm32 device. If you really need to compile it on aarch64 device, you can try to use clang --target=arm, but it will fail due to the linker error.
Anyway, llvm-as is not a GNU as replacement. Actually, they are totally different. But binutils-is-llvm wrongly symlinked llvm-as to as. I will try to fix it tomorrow.