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/* Special .init and .fini section support for ia64.
Copyright (C) 2000, 2002, 2003 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 2.1 of the License, or (at your option) any later version.
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; if not, write to the Free
Software Foundation, Inc., 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__ ("\n\n"
"#include \"defs.h\"\n"
"\n"
"/*@HEADER_ENDS*/\n"
"\n"
"/*@_init_PROLOG_BEGINS*/\n");
#ifdef HAVE_INITFINI_ARRAY
/* If we have working .init_array support, we want to keep the .init
section empty (apart from the mandatory prologue/epilogue. This
ensures that the default unwind conventions (return-pointer in b0,
frame state in ar.pfs, etc.) will do the Right Thing. To ensure
an empty .init section, we register gmon_initializer() via the
.init_array.
--davidm 02/10/29 */
static void
__attribute__ ((used))
gmon_initializer (void)
{
extern void weak_function __gmon_start__ (void);
if (__gmon_start__)
(*__gmon_start__)();
}
__asm__ (".section .init_array, \"aw\"\n"
"\tdata8 @fptr(gmon_initializer)\n");
#endif
__asm__ (".section .init\n"
" .global _init#\n"
" .proc _init#\n"
"_init:\n"
" .prologue\n"
" .save ar.pfs, r34\n"
" alloc r34 = ar.pfs, 0, 3, 0, 0\n"
" .vframe r32\n"
" mov r32 = r12\n"
" .save rp, r33\n"
" mov r33 = b0\n"
" .body\n"
" adds r12 = -16, r12\n"
#ifdef HAVE_INITFINI_ARRAY
" ;;\n" /* see gmon_initializer() above */
#else
" .weak __gmon_start__#\n"
" addl r14 = @ltoff(@fptr(__gmon_start__#)), gp\n"
" ;;\n"
" ld8 r15 = [r14]\n"
" ;;\n"
" cmp.eq p6, p7 = 0, r15\n"
" (p6) br.cond.dptk .L5\n"
"\n"
"/* we could use r35 to save gp, but we use the stack since that's what\n"
" * all the other init routines will do --davidm 00/04/05 */\n"
" st8 [r12] = gp, -16\n"
" br.call.sptk.many b0 = __gmon_start__# ;;\n"
" adds r12 = 16, r12\n"
" ;;\n"
" ld8 gp = [r12]\n"
" ;;\n"
".L5:\n"
#endif
" .endp _init#\n"
"\n"
"/*@_init_PROLOG_ENDS*/\n"
"\n"
"/*@_init_EPILOG_BEGINS*/\n"
" .proc _init#\n"
" .prologue\n"
" .save ar.pfs, r34\n"
" .vframe r32\n"
" .save rp, r33\n"
" .body\n"
" .section .init\n"
" .regstk 0,2,0,0\n"
" mov r12 = r32\n"
" mov ar.pfs = r34\n"
" mov b0 = r33\n"
" br.ret.sptk.many b0\n"
" .endp _init#\n"
"/*@_init_EPILOG_ENDS*/\n"
"\n"
"/*@_fini_PROLOG_BEGINS*/\n"
" .section .fini\n"
" .global _fini#\n"
" .proc _fini#\n"
"_fini:\n"
" .prologue\n"
" .save ar.pfs, r34\n"
" alloc r34 = ar.pfs, 0, 3, 0, 0\n"
" .vframe r32\n"
" mov r32 = r12\n"
" .save rp, r33\n"
" mov r33 = b0\n"
" .body\n"
" adds r12 = -16, r12\n"
" ;;\n"
" .endp _fini#\n"
"\n"
"/*@_fini_PROLOG_ENDS*/\n"
" br.call.sptk.many b0 = i_am_not_a_leaf# ;;\n"
" ;;\n"
"\n"
"/*@_fini_EPILOG_BEGINS*/\n"
" .section .fini\n"
" .proc _fini#\n"
" .prologue\n"
" .save ar.pfs, r34\n"
" .vframe r32\n"
" .save rp, r33\n"
" .body\n"
" mov r12 = r32\n"
" mov ar.pfs = r34\n"
" mov b0 = r33\n"
" br.ret.sptk.many b0\n"
" .endp _fini#\n"
"\n"
"/*@_fini_EPILOG_ENDS*/\n"
"\n"
"/*@TRAILER_BEGINS*/\n"
);
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