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author | Jojo <jijie_rong@c-sky.com> | 2018-08-17 19:08:27 +0000 |
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committer | Sandra Loosemore <sandra@gcc.gnu.org> | 2018-08-17 15:08:27 -0400 |
commit | 4cd0bc3b696fd8ea70f8e3d80d4eb4440e01f554 (patch) | |
tree | 011cb4090dede9796f2b6de3d40be4a534a8eaca /libgcc/config/csky/crti.S | |
parent | 9d21b3988043f147e611a1224781f4e75692cdec (diff) | |
download | gcc-4cd0bc3b696fd8ea70f8e3d80d4eb4440e01f554.zip gcc-4cd0bc3b696fd8ea70f8e3d80d4eb4440e01f554.tar.gz gcc-4cd0bc3b696fd8ea70f8e3d80d4eb4440e01f554.tar.bz2 |
C-SKY port: libgcc
2018-08-17 Jojo <jijie_rong@c-sky.com>
Huibin Wang <huibin_wang@c-sky.com>
Sandra Loosemore <sandra@codesourcery.com>
Chung-Lin Tang <cltang@codesourcery.com>
C-SKY port: libgcc
libgcc/
* config.host: Add C-SKY support.
* config/csky/*: New.
Co-Authored-By: Chung-Lin Tang <cltang@codesourcery.com>
Co-Authored-By: Huibin Wang <huibin_wang@c-sky.com>
Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>
From-SVN: r263631
Diffstat (limited to 'libgcc/config/csky/crti.S')
-rw-r--r-- | libgcc/config/csky/crti.S | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/libgcc/config/csky/crti.S b/libgcc/config/csky/crti.S new file mode 100644 index 0000000..3e4beb9 --- /dev/null +++ b/libgcc/config/csky/crti.S @@ -0,0 +1,140 @@ +# Define _init and _fini entry points for C-SKY. +# Copyright (C) 2018 Free Software Foundation, Inc. +# Contributed by C-SKY Microsystems and Mentor Graphics. +# +# This file is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; either version 3, or (at your option) any +# later version. +# +# This file 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 +# General Public License for more details. +# +# Under Section 7 of GPL version 3, you are granted additional +# permissions described in the GCC Runtime Library Exception, version +# 3.1, as published by the Free Software Foundation. +# +# You should have received a copy of the GNU General Public License and +# a copy of the GCC Runtime Library Exception along with this program; +# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +# <http://www.gnu.org/licenses/>. + + +# This file just makes a stack frame for the contents of the .fini and +# .init sections. Users may put any desired instructions in those +# sections. + + .file "crti.S" + +/* We use more complicated versions of this code with GLIBC. */ +#if defined(__gnu_linux__) + +#ifndef PREINIT_FUNCTION +# define PREINIT_FUNCTION __gmon_start__ +#endif + +#ifndef PREINIT_FUNCTION_WEAK +# define PREINIT_FUNCTION_WEAK 1 +#endif + +#if PREINIT_FUNCTION_WEAK + .global PREINIT_FUNCTION + .weak PREINIT_FUNCTION + .align 4 + .type call_weak_fn, %function +call_weak_fn: + // push lr + subi sp, 4 + stw lr, (sp) +#ifdef __PIC__ + lrw a2, PREINIT_FUNCTION@GOT + addu a2, gb + ldw a2, (a2) +#else + lrw a2, PREINIT_FUNCTION +#endif + cmpnei a2, 0 + bf 1f + jsr a2 +1: + // pop lr + ldw lr, (sp) + addi sp, 4 + rts + + .align 4 +#else + .hidden PREINIT_FUNCTION +#endif /* PREINIT_FUNCTION_WEAK */ + + .section .init,"ax",@progbits + .align 4 + .globl _init + .type _init, @function +_init: + subi sp, 8 + stw lr, (sp, 0) +#ifdef __PIC__ + // stw gb, (sp, 4) + bsr .Lgetpc +.Lgetpc: + lrw gb, .Lgetpc@GOTPC + add gb, lr +#endif +#if PREINIT_FUNCTION_WEAK +#ifdef __PIC__ + lrw a2, call_weak_fn@GOTOFF + add a2, gb + jsr a2 +#else + jsri call_weak_fn +#endif +#else /* !PREINIT_FUNCTION_WEAK */ +#ifdef __PIC__ + lrw a2, PREINIT_FUNCTION@PLT + addu a2, gb + ldw a2, (a2) + jsr a2 +#else + jsri PREINIT_FUNCTION +#endif +#endif /* PREINIT_FUNCTION_WEAK */ + + br 2f + .literals + .align 4 +2: + .section .fini,"ax",@progbits + .align 4 + .globl _fini + .type _fini, @function +_fini: + subi sp,8 + stw lr, (sp, 0) + br 2f + .literals + .align 4 +2: + +/* These are the non-GLIBC versions. */ +#else /* !defined(__gnu_linux__) */ + .section ".init" + .global _init + .type _init,@function + .align 2 +_init: + subi sp, 16 + st.w lr, (sp, 12) + mov r0, r0 + + .section ".fini" + .global _fini + .type _fini,@function + .align 2 +_fini: + subi sp, 16 + st.w lr, (sp, 12) + mov r0, r0 +#endif /* defined(__gnu_linux__) */ |