mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 05:51:10 +00:00
91 lines
2.9 KiB
ArmAsm
91 lines
2.9 KiB
ArmAsm
/* Startup code for ARC.
|
|
Copyright (C) 2020-2023 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
|