The following C souce file is compiled and produce relevant assembly
language file.
#include <stdio.h>
int main()
{
int a = 10;
int b = 20;
int result;
result = a * b;
asm ( "nop");
printf("The result is %d\n", result);
return 0;
}
.file "asmtest.c"
.section .rodata
.LC0:
.string "The result is %d\n"
.text
.globl main
.type main, @function
main:
pushl %ebp
movl %esp, %ebp
andl $-16, %esp
subl $32, %esp
movl $10, 28(%esp)
movl $20, 24(%esp)
movl 28(%esp), %eax
imull 24(%esp), %eax
movl %eax, 20(%esp)
#APP
# 10 "asmtest.c" 1
nop
# 0 "" 2
#NO_APP
movl $.LC0, %eax
movl 20(%esp), %edx
movl %edx, 4(%esp)
movl %eax, (%esp)
call printf
movl $0, %eax
leave
ret
.size main, .-main
.ident "GCC: (Ubuntu 4.4.3-4ubuntu5) 4.4.3"
.section .note.GNU-stack,"",@progbits
what's the meaning of the following slice of code?
#APP
# 10 "asmtest.c" 1
nop
# 0 "" 2
#NO_APP
