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sortix--sortix/libc/x64/start.s
2012-12-14 14:13:36 +01:00

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ArmAsm

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
start.s
A stub for linking to the C runtime on Sortix.
*******************************************************************************/
/* NOTE: This is almost identical to what is in crt1.s. crt1.s is used when
compiling with the real cross compiler, while start.s is used when
using the older hacky way of building Sortix. Please try to keep these
files alike by doing changes both places until we only build Sortix
with real cross compilers. */
.globl _start
.section .text
.type _start, @function
_start:
movq %rcx, environ # envp
pushq %rsi
pushq %rdi
call initialize_standard_library
popq %rdi
popq %rsi
# Run main
call main
# Terminate the process with main's exit code.
movl %eax, %edi
call exit