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how to print a long string using lodsl/ or any other way?

hello to all.. i am trying to copy a long string from a string in data section to a register and then back to a variable (in GNU Assembler). [code]
.asciz "hello world
.lcomm stringpointer, 20
.globl _start
leal hello,%esi
leal stringpointer,%edi
movl $4,%eax
movl $1,%ebx
movl $stringpointer,%ecx
movl $12,%edx
int $0x80

movl $7,%ebx
int $0x80


But after execution it copies only 4 characters to variable & followed by prints 4 characters to screen.

Also if i don't use "leal" and "lodsl" and "stosl", and move the contents using pointer:-
movl $hello,stringpointer
and then using print routine to print to screen, A scrap kind of value gets printed. I guess it is ASCII value of something.
Anyone plz guide what to do.(I am a beginner in assembly language.). Thanks in advance
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