Hello everyone. My name is Dušan. I am really enjoying reading the
PGU-book (v1.0). However, while I was reading, I hit a strange problem.
In chapter 6, part Reading Records, there is a small function which
prints a newline. Well, for some very strange reason, I'm unable to get
it to work. It simply does nothing, it runs and exits as expected,
without writing a newline. So I thought to my self, let's just rewrite
it. And that's what I did. It didn't help, still the same problem. I
tried changing the string to say something else, but it didn't write
that either. Here is the code (To make testing easier, I temporarily
made it a stand-alone program):
.section data
newline:
.byte 0x0A
.section .text
.globl _start
#.type write_newline, @function
_start:
# pushl %ebp # Back-up old base pointer
# movl %esp, %ebp # Copy stack pointer to %ebp
movl $4, %eax # Set syscall to write
movl $1, %ebx # Set FD according to arg1
# (Not. For testing
purpuses, 1
# is hardcoded in.)
movl $newline, %ecx # Set buffer to NEWLINE
movl $1, %edx # Set length to 1
int $0x80 # Do write
# movl %ebp, %esp # Restore stack pointer
# popl %ebp # Restore base pointer
# ret # Return control to caller
movl $1, %eax
movl $0, %ebx
int $0x80
Again, I have no Idea why am I having such problems with such a simple
function/program. It's probably something banally simple, but I'm unable
to figure it out. Help is appreciated.
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