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- /* Startup code for ARC.
- Copyright (C) 2020-2026 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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