c776b3d717
2003-12-02 David Mosberger <davidm@hpl.hp.com> * sysdeps/ia64/elf/initfini.c: Add unwind info. * sysdeps/ia64/dl-machine.h (elf_machine_matches_host): Mark with attribute "unused". (elf_machine_dynamic): Mark with attributes "unused" and "const". (elf_machine_runtime_setup): Likewise. * sysdeps/generic/dl-fptr.c (make_fptr_table): Mark with attribute "always_inline". * sysdeps/ia64/dl-machine.h (__ia64_init_bootstrap_fdesc_table): Likewise. * configure.in: Check whether compiler has libunwind support. * config.make.in (have-cc-with-libunwind): New variable. * config.h.in (HAVE_CC_WITH_LIBUNWIND): New macro. * Makeconfig (gnulib): If have-cc-withh-libunwind is "yes", also mention -lunwind. 003-11-12 David Mosberger <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/sysdep.h: Define DO_CALL_VIA_BREAK. Redefine DO_CALL to use vdso if supported, otherwise DO_CALL_VIA_BREAK. Likewise for DO_INLINE_SYSCALL. Make INTERNAL_SYSCALL use DO_INLINE_SYSCALL. * sysdeps/unix/sysv/linux/ia64/vfork.S: Use DO_CALL_VIA_BREAK() instead of DO_CALL(). * sysdeps/unix/sysv/linux/ia64/clone2.S: Use break directly instead of DO_CALL(). * sysdeps/unix/sysv/linux/ia64/brk.S (__curbrk): Restructure it to take advantage of DO_CALL() macro. * sysdeps/unix/sysv/linux/ia64/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/ia64/getcontext.S: Likewise. * elf/rtld.c (dl_main): Restrict dl_sysinfo_dso check to first program header. On ia64, the check failed previously because there are two program headers. * sysdeps/generic/s_nexttowardf.c: Likewise. * math/bug-nexttoward.c: New file.
156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/* Special .init and .fini section support for ia64.
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Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* This file is compiled into assembly code which is then munged by a sed
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script into two files: crti.s and crtn.s.
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* crti.s puts a function prologue at the beginning of the
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.init and .fini sections and defines global symbols for
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those addresses, so they can be called as functions.
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* crtn.s puts the corresponding function epilogues
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in the .init and .fini sections. */
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__asm__ ("\n\n"
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"#include \"defs.h\"\n"
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"\n"
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"/*@HEADER_ENDS*/\n"
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"\n"
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"/*@_init_PROLOG_BEGINS*/\n");
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#ifdef HAVE_INITFINI_ARRAY
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/* If we have working .init_array support, we want to keep the .init
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section empty (apart from the mandatory prologue/epilogue. This
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ensures that the default unwind conventions (return-pointer in b0,
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frame state in ar.pfs, etc.) will do the Right Thing. To ensure
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an empty .init section, we register gmon_initializer() via the
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.init_array.
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--davidm 02/10/29 */
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static void
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__attribute__ ((used))
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gmon_initializer (void)
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{
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extern void weak_function __gmon_start__ (void);
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if (__gmon_start__)
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(*__gmon_start__)();
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}
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__asm__ (".section .init_array, \"aw\"\n"
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"\tdata8 @fptr(gmon_initializer)\n");
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#endif
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__asm__ (".section .init\n"
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" .global _init#\n"
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" .proc _init#\n"
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"_init:\n"
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" .prologue\n"
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" .save ar.pfs, r34\n"
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" alloc r34 = ar.pfs, 0, 3, 0, 0\n"
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" .vframe r32\n"
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" mov r32 = r12\n"
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" .save rp, r33\n"
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" mov r33 = b0\n"
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" .body\n"
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" adds r12 = -16, r12\n"
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#ifdef HAVE_INITFINI_ARRAY
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" ;;\n" /* see gmon_initializer() above */
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#else
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" .weak __gmon_start__#\n"
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" addl r14 = @ltoff(@fptr(__gmon_start__#)), gp\n"
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" ;;\n"
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" ld8 r15 = [r14]\n"
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" ;;\n"
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" cmp.eq p6, p7 = 0, r15\n"
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" (p6) br.cond.dptk .L5\n"
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"\n"
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"/* we could use r35 to save gp, but we use the stack since that's what\n"
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" * all the other init routines will do --davidm 00/04/05 */\n"
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" st8 [r12] = gp, -16\n"
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" br.call.sptk.many b0 = __gmon_start__# ;;\n"
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" adds r12 = 16, r12\n"
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" ;;\n"
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" ld8 gp = [r12]\n"
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" ;;\n"
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".L5:\n"
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#endif
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" .endp _init#\n"
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"\n"
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"/*@_init_PROLOG_ENDS*/\n"
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"\n"
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"/*@_init_EPILOG_BEGINS*/\n"
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" .proc _init#\n"
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" .prologue\n"
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" .save ar.pfs, r34\n"
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" .vframe r32\n"
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" .save rp, r33\n"
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" .body\n"
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" .section .init\n"
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" .regstk 0,2,0,0\n"
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" mov r12 = r32\n"
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" mov ar.pfs = r34\n"
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" mov b0 = r33\n"
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" br.ret.sptk.many b0\n"
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" .endp _init#\n"
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"/*@_init_EPILOG_ENDS*/\n"
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"\n"
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"/*@_fini_PROLOG_BEGINS*/\n"
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" .section .fini\n"
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" .global _fini#\n"
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" .proc _fini#\n"
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"_fini:\n"
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" .prologue\n"
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" .save ar.pfs, r34\n"
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" alloc r34 = ar.pfs, 0, 3, 0, 0\n"
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" .vframe r32\n"
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" mov r32 = r12\n"
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" .save rp, r33\n"
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" mov r33 = b0\n"
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" .body\n"
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" adds r12 = -16, r12\n"
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" ;;\n"
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" .endp _fini#\n"
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"\n"
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"/*@_fini_PROLOG_ENDS*/\n"
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" br.call.sptk.many b0 = i_am_not_a_leaf# ;;\n"
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" ;;\n"
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"\n"
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"/*@_fini_EPILOG_BEGINS*/\n"
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" .section .fini\n"
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" .proc _fini#\n"
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" .prologue\n"
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" .save ar.pfs, r34\n"
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" .vframe r32\n"
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" .save rp, r33\n"
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" .body\n"
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" mov r12 = r32\n"
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" mov ar.pfs = r34\n"
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" mov b0 = r33\n"
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" br.ret.sptk.many b0\n"
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" .endp _fini#\n"
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"\n"
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"/*@_fini_EPILOG_ENDS*/\n"
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"\n"
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"/*@TRAILER_BEGINS*/\n"
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);
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