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## Copyright (C) 2016 Jeremiah Orians
## This file is part of M2-Planet.
##
## M2-Planet is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## M2-Planet is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.
:_start
mov_rbp,rsp ; Protect rsp
;; Prepare argv
lea_rax,[rbp+DWORD] %8 ; ARGV_address = RBP + 8
push_rax ; Put argv on the stack
;; Prepare envp
mov_rax,rbp ; Address we need to load from
mov_rax,[rax] ; Get ARGC
add_rax, %2 ; OFFSET = ARGC + 2
sal_rax, !3 ; OFFSET = OFFSET * WORDSIZE
add_rax,rbp ; ENVP_address = RSP + OFFSET
push_rax ; Put envp on the stack
;; Stack offset
add_rbp, %8 ; Fix rbp
;; Perform the main loop
call %FUNCTION_main
push_rax ; Put return value on the stack
push_rax ; So that _exit gets it
:FUNCTION_exit
:FUNCTION__exit
pop_rbx
pop_rdi
mov_rax, %0x3C
syscall
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