| /* Special .init and .fini section support. Linuxthread version. |
| Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it |
| and/or modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| In addition to the permissions in the GNU Lesser General Public |
| License, the Free Software Foundation gives you unlimited |
| permission to link the compiled version of this file with other |
| programs, and to distribute those programs without any restriction |
| coming from the use of this file. (The Library General Public |
| License restrictions do apply in other respects; for example, they |
| cover modification of the file, and distribution when not linked |
| into another program.) |
| |
| The GNU C Library 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 Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If not, |
| write to the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* This file is compiled into assembly code which is then munged by a sed |
| script into two files: crti.s and crtn.s. |
| |
| * crti.s puts a function prologue at the beginning of the |
| .init and .fini sections and defines global symbols for |
| those addresses, so they can be called as functions. |
| |
| * crtn.s puts the corresponding function epilogues |
| in the .init and .fini sections. */ |
| |
| #include <stdlib.h> |
| |
| /* We use embedded asm for .section unconditionally, as this makes it |
| easier to insert the necessary directives into crtn.S. */ |
| #define SECTION(x) asm (".section " x ) |
| |
| /* Embed an #include to pull in the alignment and .end directives. */ |
| asm ("\n#include \"defs.h\""); |
| |
| /* The initial common code ends here. */ |
| asm ("\n/*@HEADER_ENDS*/"); |
| |
| /* To determine whether we need .end and .align: */ |
| asm ("\n/*@TESTS_BEGIN*/"); |
| extern void dummy (void (*foo) (void)); |
| void |
| dummy (void (*foo) (void)) |
| { |
| if (foo) |
| (*foo) (); |
| } |
| asm ("\n/*@TESTS_END*/"); |
| |
| /* The beginning of _init: */ |
| asm ("\n/*@_init_PROLOG_BEGINS*/"); |
| |
| static void |
| call_initialize_minimal (void) |
| { |
| extern void __pthread_initialize_minimal_internal (void) |
| __attribute ((visibility ("hidden"))); |
| |
| __pthread_initialize_minimal_internal (); |
| } |
| |
| SECTION (".init"); |
| extern void __attribute__ ((section (".init"))) _init (void); |
| void |
| _init (void) |
| { |
| /* The very first thing we must do is to set up the registers. */ |
| call_initialize_minimal (); |
| |
| asm ("ALIGN"); |
| asm("END_INIT"); |
| /* Now the epilog. */ |
| asm ("\n/*@_init_PROLOG_ENDS*/"); |
| asm ("\n/*@_init_EPILOG_BEGINS*/"); |
| SECTION(".init"); |
| } |
| asm ("END_INIT"); |
| |
| /* End of the _init epilog, beginning of the _fini prolog. */ |
| asm ("\n/*@_init_EPILOG_ENDS*/"); |
| asm ("\n/*@_fini_PROLOG_BEGINS*/"); |
| |
| SECTION (".fini"); |
| extern void __attribute__ ((section (".fini"))) _fini (void); |
| void |
| _fini (void) |
| { |
| |
| /* End of the _fini prolog. */ |
| asm ("ALIGN"); |
| asm ("END_FINI"); |
| asm ("\n/*@_fini_PROLOG_ENDS*/"); |
| |
| { |
| /* Let GCC know that _fini is not a leaf function by having a dummy |
| function call here. We arrange for this call to be omitted from |
| either crt file. */ |
| extern void i_am_not_a_leaf (void); |
| i_am_not_a_leaf (); |
| } |
| |
| /* Beginning of the _fini epilog. */ |
| asm ("\n/*@_fini_EPILOG_BEGINS*/"); |
| SECTION (".fini"); |
| } |
| asm ("END_FINI"); |
| |
| /* End of the _fini epilog. Any further generated assembly (e.g. .ident) |
| is shared between both crt files. */ |
| asm ("\n/*@_fini_EPILOG_ENDS*/"); |
| asm ("\n/*@TRAILER_BEGINS*/"); |
| |
| /* End of file. */ |