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/* Startup code for ARC.
Copyright (C) 2020-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU 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 2.1 of the License, or (at your option) any later version.
The GNU 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 GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#define __ASSEMBLY__ 1
#include <entry.h>
#include <sysdep.h>
#ifndef ENTRY_POINT
# error ENTRY_POINT needs to be defined for ARC
#endif
/* When we enter this piece of code, the program stack looks like this:
argc argument counter (integer)
argv[0] program name (pointer)
argv[1...N] program args (pointers)
argv[argc-1] end of args (integer)
NULL
env[0...N] environment variables (pointers)
NULL. */
ENTRY (ENTRY_POINT)
/* Needed to make gdb backtraces stop here. */
.cfi_label .Ldummy
cfi_undefined (blink)
mov fp, 0
ld_s r1, [sp] /* argc. */
mov_s r5, r0 /* rltd_fini. */
add_s r2, sp, 4 /* argv. */
and sp, sp, -8
mov r6, sp
/* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end). */
mov_s r3, 0 /* Used to be init. */
mov r4, 0 /* Used to be fini. */
#ifdef SHARED
ld r0, [pcl, @main@gotpc]
bl __libc_start_main@plt
#else
mov_s r0, main
bl __libc_start_main
#endif
/* Should never get here. */
flag 1
END (ENTRY_POINT)
/* Define a symbol for the first piece of initialized data. */
.data
.globl __data_start
__data_start:
.long 0
.weak data_start
data_start = __data_start
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