# readtest1.s - An example of reading data from a file.section .bss   .lcomm buffer, 42   .lcomm filehandle, 4.section .text.globl _start_start:   nop   movl %esp, %ebp   movl $5, %eax   movl 8(%ebp), %ebx   movl $00, %ecx   movl $0444, %edx   int $0x80   test %eax, %eax   js badfile   movl %eax, filehandle   movl $3, %eax   movl filehandle, %ebx   movl $buffer, %ecx   movl $42, %edx   int $0x80   test %eax, %eax   js badfile   movl $4, %eax   movl $1, %ebx   movl $buffer, %ecx   movl $42, %edx   int $0x80   test %eax, %eax   js badfile   movl $6, %eax   movl filehandle, %ebx   int $0x80badfile:   movl %eax, %ebx   movl $1, %eax   int $0x80