Linux/HPPA specific startup code.

sysdeps/hppa/elf/initfini.c

@@ -0,0 +1,117 @@
+/* Special .init and .fini section support for HPPA
+   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. */
+
+/* If we use the standard C version, the linkage table pointer won't
+   be properly preserved due to the splitting up of function prologues
+   and epilogues.  Therefore we write these in assembly to make sure
+   they do the right thing.
+
+   Note that we cannot have a weak undefined __gmon_start__, because
+   that would require this to be PIC, and the linker is currently not
+   able to generate a proper procedure descriptor for _init.  Sad but
+   true.  Anyway, HPPA is one of those horrible architectures where
+   making the comparison and indirect call is quite expensive (see the
+   comment in sysdeps/generic/initfini.c). */
+
+__asm__ ("
+
+#include \"defs.h\"
+
+/*@HEADER_ENDS*/
+
+/*@_init_PROLOG_BEGINS*/
+	.section .init
+	.align 4
+	.globl _init
+	.type _init,@function
+	.proc
+	.callinfo
+_init:
+	stw	%rp,-20(%sp)
+	stwm	%r4,64(%sp)
+	stw	%r19,-32(%sp)
+	bl	__gmon_start__,%rp
+	copy	%r19,%r4	/* delay slot */
+	copy	%r4,%r19
+	.align 4
+	.procend
+/*@_init_PROLOG_ENDS*/
+
+/*@_init_EPILOG_BEGINS*/
+	.section .init
+	copy	%r4,%r19
+	ldw	-84(%sp),%rp
+	bv	%r0(%rp)
+	ldwm	-64(%sp),%r4
+        .text
+        .align 4
+        .weak   __gmon_start__
+        .type    __gmon_start__,@function
+	.proc
+	.callinfo
+__gmon_start__:
+        bv,n %r0(%r2)
+	.procend
+/*@_init_EPILOG_ENDS*/
+
+/*@_fini_PROLOG_BEGINS*/
+	.section .fini
+	.align 4
+	.globl _fini
+	.type _fini,@function
+	.proc
+	.callinfo
+_fini:
+	stw	%rp,-20(%sp)
+	stwm	%r4,64(%sp)
+	stw	%r19,-32(%sp)
+	copy	%r19,%r4
+	.align 4
+	.procend
+/*@_fini_PROLOG_ENDS*/
+
+/*@_fini_EPILOG_BEGINS*/
+	.section .fini
+	copy	%r4,%r19
+	ldw	-84(%sp),%rp
+	bv	%r0(%rp)
+	ldwm	-64(%sp),%r4
+/*@_fini_EPILOG_ENDS*/
+
+/*@TRAILER_BEGINS*/
+");