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PREFIX=$HOME/qemu-arm

export PATH=$PREFIX/bin:$PATH
export LD_LIBRARY_PATH=$PREFIX/lib:$LD_LIBRARY_PATH

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	.syntax unified
	.thumb

	.data
out:
	.space 10*4
semihost_arg:
	.space 4*4

	.text

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	.syntax unified
	.thumb

#include <sys/syscall.h>

	.section .text
	.global _start
	.thumb_func
_start:
	/* write(1, "hello, world", 13) */

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Failed to synchronize cache for repo 'rpmfusion-nonfree' from 'http://mirrors.rpmfusion.org/mirrorlist?repo=nonfree-fedora-22&arch=x86_64': Cannot prepare internal mirrorlist: No URLs in mirrorlist, disabling.
Last metadata expiration check performed 1:58:06 ago on Wed May 13 14:51:20 2015.
Dependencies resolved.
============================================================================================================================================
 Package                                            Arch            Version                                  Repository                Size
============================================================================================================================================
Installing:
 kernel                                             x86_64          4.0.2-300.fc22                           updates-testing           64 k
 kernel-core                                        x86_64          4.0.2-300.fc22                           updates-testing           

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volatile int n;

int main()
{
	n = 29;
	while (n != 1)
		if (n % 2 == 1)
			n = 3*n + 1;
		else
			n = n/2;

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file s
set disable-randomization on
set disassemble-next-line on
# break on call 'swap@plt' in main
break *0x0804857c
break 'swap@plt'
run
si
disassemble 'swap@plt'
printf "\n\ninfo symbol 0x804a014: "