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/* Startup code for ARC.
Copyright (C) 2020-2024 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.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The GNU Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
Note that people who make modified versions of this file are not
obligated to grant this special exception for their modified
versions; it is their choice whether to do so. The GNU Lesser
General Public License gives permission to release a modified
version without this exception; this exception also makes it
possible to release a modified version which carries forward this
exception.
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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