74 lines
2.0 KiB
ArmAsm
74 lines
2.0 KiB
ArmAsm
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/* Startup code for ARC.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#define __ASSEMBLY__ 1
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#include <entry.h>
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#include <sysdep.h>
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#ifndef ENTRY_POINT
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# error ENTRY_POINT needs to be defined for ARC
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#endif
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/* When we enter this piece of code, the program stack looks like this:
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argc argument counter (integer)
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argv[0] program name (pointer)
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argv[1...N] program args (pointers)
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argv[argc-1] end of args (integer)
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NULL
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env[0...N] environment variables (pointers)
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NULL. */
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ENTRY (ENTRY_POINT)
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/* Needed to make gdb backtraces stop here. */
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.cfi_label .Ldummy
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cfi_undefined (blink)
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mov fp, 0
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ld_s r1, [sp] /* argc. */
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mov_s r5, r0 /* rltd_fini. */
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add_s r2, sp, 4 /* argv. */
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and sp, sp, -8
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mov r6, sp
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/* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end). */
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mov_s r3, 0 /* Used to be init. */
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mov r4, 0 /* Used to be fini. */
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#ifdef SHARED
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ld r0, [pcl, @main@gotpc]
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bl __libc_start_main@plt
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#else
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mov_s r0, main
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bl __libc_start_main
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#endif
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/* Should never get here. */
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flag 1
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END (ENTRY_POINT)
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/* Define a symbol for the first piece of initialized data. */
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.data
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.globl __data_start
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__data_start:
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.long 0
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.weak data_start
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data_start = __data_start
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