Created
July 21, 2013 19:03
Listing 5 from http://www.ibm.com/developerworks/library/l-gas-nasm/ translated to GNU as and written using intel syntax.
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# Example adapted from http://www.ibm.com/developerworks/library/l-gas-nasm/ | |
# Assemble with: as --gstabs+ -o nasm2gas5.o nasm2gas5.s | |
# Link with: ld --dynamic-linker /lib/ld-linux.so.2 -lc -o nasm2gas5 nasm2gas5.o | |
# | |
# Support intel syntal vs. ATT and don't use % before register names | |
.intel_syntax noprefix | |
.section .data | |
# Command table to store at most 10 command line arguments | |
cmd_tbl: .rept 10 | |
.long 0 | |
.endr | |
.section .text | |
# Program entry point | |
.globl _start | |
_start: | |
# Set up the stack frame | |
mov ebp, esp | |
# Top of stack contains the number of command line arguments. Default is 1. | |
mov ecx, [ebp] | |
# Exit if arguments are more than 10 | |
cmp ecx, 10 | |
jg _exit | |
mov esi, 1 | |
mov edi, 0 | |
# Store the command line arguments in the command table | |
store_loop: | |
mov eax, [ebp + esi * 4] | |
mov [OFFSET FLAT:cmd_tbl + edi * 4], eax | |
inc esi | |
inc edi | |
loop store_loop | |
mov ecx, edi | |
mov esi, 0 | |
print_loop: | |
#Make some local space | |
sub esp, 4 | |
# puts function corrupts ecx | |
mov [ebp - 4], ecx | |
mov eax, [OFFSET FLAT:cmd_tbl + esi * 4] | |
push eax | |
call puts | |
add esp, 4 | |
mov ecx, [ebp - 4] | |
inc esi | |
loop print_loop | |
jmp _exit | |
_exit: | |
mov eax, 1 | |
mov ebx, 0 | |
int 0x80 |
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