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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/config/arm/crtn.asm
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diff --git a/gcc/config/arm/crtn.asm b/gcc/config/arm/crtn.asm
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+# Copyright (C) 2001, 2004, 2008, 2009, 2010 Free Software Foundation, Inc.
+# Written By Nick Clifton
+#
+# 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/>.
+
+/* An executable stack is *not* required for these functions. */
+#if defined(__ELF__) && defined(__linux__)
+.section .note.GNU-stack,"",%progbits
+.previous
+#endif
+
+#ifdef __ARM_EABI__
+/* Some attributes that are common to all routines in this file. */
+ /* Tag_ABI_align_needed: This code does not require 8-byte
+ alignment from the caller. */
+ /* .eabi_attribute 24, 0 -- default setting. */
+ /* Tag_ABI_align_preserved: This code preserves 8-byte
+ alignment in any callee. */
+ .eabi_attribute 25, 1
+#endif /* __ARM_EABI__ */
+
+# This file just makes sure that the .fini and .init sections do in
+# fact return. Users may put any desired instructions in those sections.
+# This file is the last thing linked into any executable.
+
+ # Note - this macro is complemented by the FUNC_START macro
+ # in crti.asm. If you change this macro you must also change
+ # that macro match.
+ #
+ # Note - we do not try any fancy optimizations of the return
+ # sequences here, it is just not worth it. Instead keep things
+ # simple. Restore all the save resgisters, including the link
+ # register and then perform the correct function return instruction.
+ # We also save/restore r3 to ensure stack alignment.
+.macro FUNC_END
+#ifdef __thumb__
+ .thumb
+
+ pop {r3, r4, r5, r6, r7}
+ pop {r3}
+ mov lr, r3
+#else
+ .arm
+
+ sub sp, fp, #40
+ ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr}
+#endif
+
+#if defined __THUMB_INTERWORK__ || defined __thumb__
+ bx lr
+#else
+ mov pc, lr
+#endif
+.endm
+
+
+ .section ".init"
+ ;;
+ FUNC_END
+
+ .section ".fini"
+ ;;
+ FUNC_END
+
+# end of crtn.asm