From d38a64b4e0b3b1a27afc2d660144032e68f41135 Mon Sep 17 00:00:00 2001 From: Joern Rennecke Date: Tue, 1 Oct 2013 17:12:59 +0000 Subject: config.host (arc*-*-elf*, [...]): New configurations. 2013-10-01 Joern Rennecke Brendan Kehoe Simon Cook * config.host (arc*-*-elf*, arc*-*-linux-uclibc*): New configurations. * config/arc: New directory. * longlong.h [__arc__] (umul_ppmm): Remove. [__arc__] (__umulsidi3): Define. [__arc__ && __ARC_NORM__] (count_leading_zeroes): Define. [__arc__ && __ARC_NORM__] (COUNT_LEADING_ZEROS_0): Likewise. Co-Authored-By: Brendan Kehoe Co-Authored-By: Simon Cook From-SVN: r203073 --- libgcc/config/arc/initfini.c | 157 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 libgcc/config/arc/initfini.c (limited to 'libgcc/config/arc/initfini.c') diff --git a/libgcc/config/arc/initfini.c b/libgcc/config/arc/initfini.c new file mode 100644 index 0000000..a59e9cc --- /dev/null +++ b/libgcc/config/arc/initfini.c @@ -0,0 +1,157 @@ +/* .init/.fini section handling + C++ global constructor/destructor handling. + This file is based on crtstuff.c, sol2-crti.asm, sol2-crtn.asm. + + Copyright (C) 1995, 1997, 1998, 2007-2012 Free Software Foundation, Inc. + Contributor: Joern Rennecke + on behalf of Synopsys 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 +. */ + +/* Declare a pointer to void function type. */ +typedef void (*func_ptr) (void); + +#ifdef CRT_INIT + +/* NOTE: In order to be able to support SVR4 shared libraries, we arrange + to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__, + __DTOR_END__ } per root executable and also one set of these symbols + per shared library. So in any given whole process image, we may have + multiple definitions of each of these symbols. In order to prevent + these definitions from conflicting with one another, and in order to + ensure that the proper lists are used for the initialization/finalization + of each individual shared library (respectively), we give these symbols + only internal (i.e. `static') linkage, and we also make it a point to + refer to only the __CTOR_END__ symbol in crtfini.o and the __DTOR_LIST__ + symbol in crtinit.o, where they are defined. */ + +static func_ptr __CTOR_LIST__[1] __attribute__ ((section (".ctors"))) + = { (func_ptr) (-1) }; + +static func_ptr __DTOR_LIST__[1] __attribute__ ((section (".dtors"))) + = { (func_ptr) (-1) }; + +/* Run all the global destructors on exit from the program. */ + +/* Some systems place the number of pointers in the first word of the + table. On SVR4 however, that word is -1. In all cases, the table is + null-terminated. On SVR4, we start from the beginning of the list and + invoke each per-compilation-unit destructor routine in order + until we find that null. + + Note that this function MUST be static. There will be one of these + functions in each root executable and one in each shared library, but + although they all have the same code, each one is unique in that it + refers to one particular associated `__DTOR_LIST__' which belongs to the + same particular root executable or shared library file. */ + +static void __do_global_dtors (void) +asm ("__do_global_dtors") __attribute__ ((section (".text"))); + +static void +__do_global_dtors (void) +{ + func_ptr *p; + for (p = __DTOR_LIST__ + 1; *p; p++) + (*p) (); +} + +/* .init section start. + This must appear at the start of the .init section. */ + +asm ("\n\ + .section .init\n\ + .global init\n\ + .word 0\n\ +init:\n\ + st blink,[sp,4]\n\ + st fp,[sp]\n\ + mov fp,sp\n\ + sub sp,sp,16\n\ +"); + +/* .fini section start. + This must appear at the start of the .init section. */ + +asm ("\n\ + .section .fini\n\ + .global fini\n\ + .word 0\n\ +fini:\n\ + st blink,[sp,4]\n\ + st fp,[sp]\n\ + mov fp,sp\n\ + sub sp,sp,16\n\ + bl.nd __do_global_dtors\n\ +"); + +#endif /* CRT_INIT */ + +#ifdef CRT_FINI + +/* Put a word containing zero at the end of each of our two lists of function + addresses. Note that the words defined here go into the .ctors and .dtors + sections of the crtend.o file, and since that file is always linked in + last, these words naturally end up at the very ends of the two lists + contained in these two sections. */ + +static func_ptr __CTOR_END__[1] __attribute__ ((section (".ctors"))) + = { (func_ptr) 0 }; + +static func_ptr __DTOR_END__[1] __attribute__ ((section (".dtors"))) + = { (func_ptr) 0 }; + +/* Run all global constructors for the program. + Note that they are run in reverse order. */ + +static void __do_global_ctors (void) +asm ("__do_global_ctors") __attribute__ ((section (".text"))); + +static void +__do_global_ctors (void) +{ + func_ptr *p; + for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--) + (*p) (); +} + +/* .init section end. + This must live at the end of the .init section. */ + +asm ("\n\ + .section .init\n\ + bl.nd __do_global_ctors\n\ + ld blink,[fp,4]\n\ + j.d blink\n\ + ld.a fp,[sp,16]\n\ +"); + +/* .fini section end. + This must live at the end of the .fini section. */ + +asm ("\n\ + .section .fini\n\ + ld blink,[fp,4]\n\ + j.d blink\n\ + ld.a fp,[sp,16]\n\ +"); + +#endif /* CRT_FINI */ -- cgit v1.1