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| author | Jeff Law <law@gcc.gnu.org> | 1997-09-09 15:50:26 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1997-09-09 15:50:26 -0600 |
| commit | d7ad6040df4c6cdca2da4ee2801860da2c0164ba (patch) | |
| tree | a5284e7a82cd004a36c041a7bcf59f223354afbe /gcc | |
| parent | 233bd86d2e8877607e0d731f2bb6809d13a30460 (diff) | |
| download | gcc-d7ad6040df4c6cdca2da4ee2801860da2c0164ba.zip gcc-d7ad6040df4c6cdca2da4ee2801860da2c0164ba.tar.gz gcc-d7ad6040df4c6cdca2da4ee2801860da2c0164ba.tar.bz2 | |
Add port done awhile ago for the ARC cpu.
* arc/arc.h: New file.
* arc/arc.c: New file.
* arc/arc.md: New file.
* arc/initfini.c: New file.
* arc/lib1funcs.asm: New file.
* arc/t-arc: New file.
* arc/xm-arc.h: New file.
* ginclude/va-arc.h: New file.
* ginclude/stdarg.h: Include va-arc.h ifdef __arc__.
* ginclude/varargs.h: Likewise.
* Makefile.in (USER_H): Add va-arc.h.
* configure.in (arc-*-elf*): Recognize.
* longlong.h: Add ARC support.
Mostly so I can test changes in snapshot scripts.
* expr.c (clear_storage): Use CONST0_RTX instead of const0_rtx.
when clearing non-BLKmode data.
Fixes sparc problem.
From-SVN: r15184
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/arc/initfini.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/gcc/config/arc/initfini.c b/gcc/config/arc/initfini.c new file mode 100644 index 0000000..084e229 --- /dev/null +++ b/gcc/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 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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 2, or (at your option) +any later version. + +GNU CC 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. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* As a special exception, if you link this file with files + compiled with GCC to produce an executable, this does not cause + the resulting executable to be covered by the GNU General Public License. + This exception does not however invalidate any other reasons why + the executable file might be covered by the GNU General Public License. */ + +/* 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 () +asm ("__do_global_dtors") __attribute__ ((section (".text"))); + +static void +__do_global_dtors () +{ + 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 (" + .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 (" + .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 +"); + +#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 () +asm ("__do_global_ctors") __attribute__ ((section (".text"))); + +static void +__do_global_ctors () +{ + 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 (" + .section .init\n + bl.nd __do_global_ctors + 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 (" + .section .fini\n + ld blink,[fp,4]\n + j.d blink\n + ld.a fp,[sp,16]\n +"); + +#endif /* CRT_FINI */ |