1 /* Startup code compliant to the ELF C-SKY ABIV2.
2 Copyright (C) 2018-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 In addition to the permissions in the GNU Lesser General Public
11 License, the Free Software Foundation gives you unlimited
12 permission to link the compiled version of this file with other
13 programs, and to distribute those programs without any restriction
14 coming from the use of this file. (The GNU Lesser General Public
15 License restrictions do apply in other respects; for example, they
16 cover modification of the file, and distribution when not linked
17 into another program.)
19 Note that people who make modified versions of this file are not
20 obligated to grant this special exception for their modified
21 versions; it is their choice whether to do so. The GNU Lesser
22 General Public License gives permission to release a modified
23 version without this exception; this exception also makes it
24 possible to release a modified version which carries forward this
27 The GNU C Library is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 Lesser General Public License for more details.
32 You should have received a copy of the GNU Lesser General Public
33 License along with the GNU C Library. If not, see
34 <http://www.gnu.org/licenses/>. */
37 __libc_start_main (int (*main) (int, char **, char **), int argc,
38 char **argv, void (*init) (void), void (*fini) (void),
39 void (*rtld_fini) (void), void *stack_end)
46 .type _start,@function;
50 /* Clear the link register since this is the outermost frame. */
52 /* Pop argc off the stack and save a pointer to argv. */
53 ldw a1, (sp, 8) /* Init argc for __libc_start_main. */
54 addi a2, sp, 12 /* Init argv for __libc_start_main. */
56 /* Push stack limit. */
66 lrw a3, __libc_csu_fini@GOT
67 ldr.w a3, (gb, a3 << 0)
70 lrw a3, __libc_csu_init@GOT
77 lrw t1, __libc_start_main@PLT
78 ldr.w t1, (gb, t1 << 0)
82 ldr.w t1, (gb, t1 << 0)
85 /* Fetch address of __libc_csu_fini. */
86 lrw a0, __libc_csu_fini
87 /* Push __libc_csu_fini */
90 /* Set up the other arguments in registers. */
92 lrw a3, __libc_csu_init
93 /* Let the libc call main and exit with its return code. */
94 jsri __libc_start_main
96 /* Should never get here. */
102 /* Define a symbol for the first piece of initialized data. */
108 data_start = __data_start