Re: Adding SH support to glibc-2.2

["H . J . Lu" <hjl at lucon dot org>]

On Mon, Jun 12, 2000 at 03:09:42PM +0900, kaz Kojima wrote:
> H . J . Lu writes:
> >> 	* csu/Makefile: Add new variable crts-predefined whose non-zero
> >> 	value means to generate crt[in].o from system dependent predefined
> >> 	crt[in].S instead of initfini.c.
> > 
> > I don't like it. IA-64 also has its own crt[in].o. Could you please
> > take a look at how we did it and copy it to SH?
> 
> ok. Can you please tell me where should I see?
> 

Ooops. That file hasn't been checked in yet. I created it for the
current ia64 glibc port. It should be sysdeps/ia64/elf/initfini.c.
That is all we need. You can put your SH specific initfini.c in some
directory specific to SH.


H.J.
----
/* Special .init and .fini section support for ia64.
   Copyright (C) 2000 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 Library 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 Library 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 Library General Public License for more details.

   You should have received a copy of the GNU Library 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. */

__asm__ ("

#include \"defs.h\"

/*@HEADER_ENDS*/

/*@TESTS_BEGIN*/
.text
	.align 16
	.global dummy#
	.proc dummy#
dummy:
	alloc r35 = ar.pfs, 1, 3, 0, 0
	mov r33 = r12
	mov r34 = b0
	adds r12 = -16, r12
	cmp.eq p6, p7 = 0, r32
	(p6) br.cond.dptk .L3
	adds r14 = 8, r32
	ld8 r15 = [r32]
	;;
	mov b6 = r15
	ld8 r1 = [r14]
	;;
	br.call.sptk.many b0 = b6 ;;
.L3:
	mov r12 = r33
	;;
	mov ar.pfs = r35
	mov b0 = r34
	br.ret.sptk.many b0
	.endp dummy#

/*@TESTS_END*/

/*@_init_PROLOG_BEGINS*/
	.section .init
	.align 16
	.global _init#
	.proc _init#
_init:
	alloc r34 = ar.pfs, 0, 3, 0, 0
	mov r32 = r12
	mov r33 = b0
	adds r12 = -16, r12
	addl r14 = @ltoff(@fptr(__gmon_start__#)), gp
	;;
	ld8 r15 = [r14]
	;;
	cmp.eq p6, p7 = 0, r15
	(p6) br.cond.dptk .L5

	// we could use r35 to save gp, but we use the stack since that's what all the
	// other init routines will do --davidm 00/04/05
	st8 [r12] = gp, -16
	br.call.sptk.many b0 = __gmon_start__# ;;
	adds r12 = 16, r12
	;;
	ld8 gp = [r12]
	;;
.L5:
	.align 16
	.endp _init#

/*@_init_PROLOG_ENDS*/

/*@_init_EPILOG_BEGINS*/
	.section .init
	.regstk 0,2,0,0
	mov r12 = r32
	mov ar.pfs = r34
	mov b0 = r33
	br.ret.sptk.many b0
	.endp _init#
/*@_init_EPILOG_ENDS*/

/*@_fini_PROLOG_BEGINS*/
	.section .fini
	.align 16
	.global _fini#
	.proc _fini#
_fini:
	alloc r34 = ar.pfs, 0, 3, 0, 0
	mov r32 = r12
	mov r33 = b0
	adds r12 = -16, r12
	;;
	.align 16
	.endp _fini#

/*@_fini_PROLOG_ENDS*/
	br.call.sptk.many b0 = i_am_not_a_leaf# ;;
	;;

/*@_fini_EPILOG_BEGINS*/
	.section .fini
	mov r12 = r32
	mov ar.pfs = r34
	mov b0 = r33
	br.ret.sptk.many b0
	.endp _fini#

/*@_fini_EPILOG_ENDS*/

/*@TRAILER_BEGINS*/
	.weak	__gmon_start__#
");