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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/mips/irix-crti.asm
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+/* Copyright (C) 2004, 2008 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC 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.
+
+GCC 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/>. */
+
+ .abicalls
+ .set noreorder
+ .set nomacro
+
+/* The GNU and SGI linkers differ in their implementation of -init and -fini.
+ With the GNU linker, there can only be a single -init option, and the
+ linker simply sets DT_INIT to that value. gcc's initialization and
+ finalization code can go directly in .init, with the prologue and
+ epilogue of the main initialization routine being provided by external
+ object files (*crti.o and *crtn.o in this case).
+
+ The SGI linker instead accepts several -init options. It will set DT_INIT
+ to a linker-created function (placed in .init) that calls each of the -init
+ functions in turn. If there is any user code in .init, this linker-created
+ function will be placed after it. Note that such user code is not treated
+ specially; it will only be called if the -init options arrange for it to
+ be called.
+
+ In theory, the SGI model should allow the crti, crtn and intermediate code
+ to go in .init, just like it can with the GNU linker. However, doing this
+ seems to confuse the linker and triggers an internal error:
+
+ ld32: FATAL 2 : Internal: at ../../ld/mips_code.c mips_code_fixup()
+ text section overflow!
+
+ (seen with MIPSpro 7.30). We therefore put everything in a special
+ .gcc_init section instead. */
+
+ .section .gcc_init,"ax",@progbits
+ .globl __gcc_init
+__gcc_init:
+#if _MIPS_SIM == _ABIO32
+ addiu $sp,$sp,-16
+ sw $31,0($sp)
+#else
+ daddiu $sp,$sp,-16
+ sd $31,0($sp)
+ sd $28,8($sp)
+#endif
+
+ .section .gcc_fini,"ax",@progbits
+ .globl __gcc_fini
+__gcc_fini:
+#if _MIPS_SIM == _ABIO32
+ addiu $sp,$sp,-16
+ sw $31,0($sp)
+#else
+ daddiu $sp,$sp,-16
+ sd $31,0($sp)
+ sd $28,8($sp)
+#endif
+
+/* This object will typically be included in the final link for both
+ shared libraries and executable, and we need to hide the symbols to
+ prevent possible symbol preemption warnings from the SGI linker. */
+.hidden __gcc_init
+.hidden __gcc_fini
+