Initialization code for libpthread on Alpha.

diff --git a/sysdeps/alpha/nptl/elf/pt-initfini.c b/sysdeps/alpha/nptl/elf/pt-initfini.c
new file mode 100644 (file)
index 0000000..d48c571
--- /dev/null
+++ b/sysdeps/alpha/nptl/elf/pt-initfini.c
@@ -0,0 +1,93 @@
+/* Special .init and .fini section support for Alpha.  NPTL version.
+   Copyright (C) 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.
+
+   This differs from what would be generated by the generic code in that
+   we save and restore the GP within the function.  In order for linker
+   relaxation to work, the value in the GP register on exit from a function
+   must be valid for the function entry point.  Normally, a function is
+   contained within one object file and this is not an issue, provided
+   that the function reloads the gp after making any function calls.
+   However, _init and _fini are constructed from pieces of many object
+   files, all of which may have different GP values.  So we must reload
+   the GP value from crti.o in crtn.o.  */
+
+__asm__ ("                                             \n\
+#include \"defs.h\"                                    \n\
+                                                       \n\
+/*@HEADER_ENDS*/                                       \n\
+                                                       \n\
+/*@_init_PROLOG_BEGINS*/                               \n\
+       .section .init, \"ax\", @progbits               \n\
+       .globl  _init                                   \n\
+       .ent    _init                                   \n\
+_init:                                                 \n\
+       ldgp    $29, 0($27)                             \n\
+       subq    $30, 16, $30                            \n\
+       stq     $26, 0($30)                             \n\
+       stq     $29, 8($30)                             \n\
+       .prologue 1                                     \n\
+       bsr     $26, __pthread_initialize_minimal_internal !samegp \n\
+       .align 3                                        \n\
+       .end    _init                                   \n\
+       .size   _init, 0                                \n\
+/*@_init_PROLOG_ENDS*/                                 \n\
+                                                       \n\
+/*@_init_EPILOG_BEGINS*/                               \n\
+       .section .init, \"ax\", @progbits               \n\
+       ldq     $26, 0($30)                             \n\
+       ldq     $29, 8($30)                             \n\
+       addq    $30, 16, $30                            \n\
+       ret                                             \n\
+/*@_init_EPILOG_ENDS*/                                 \n\
+                                                       \n\
+/*@_fini_PROLOG_BEGINS*/                               \n\
+       .section .fini, \"ax\", @progbits               \n\
+       .globl  _fini                                   \n\
+       .ent    _fini                                   \n\
+_fini:                                                 \n\
+       ldgp    $29, 0($27)                             \n\
+       subq    $30, 16, $30                            \n\
+       stq     $26, 0($30)                             \n\
+       stq     $29, 8($30)                             \n\
+       .prologue 1                                     \n\
+       .align 3                                        \n\
+       .end    _fini                                   \n\
+       .size   _fini, 0                                \n\
+/*@_fini_PROLOG_ENDS*/                                 \n\
+                                                       \n\
+/*@_fini_EPILOG_BEGINS*/                               \n\
+       .section .fini, \"ax\", @progbits               \n\
+       ldq     $26, 0($30)                             \n\
+       ldq     $29, 8($30)                             \n\
+       addq    $30, 16, $30                            \n\
+       ret                                             \n\
+/*@_fini_EPILOG_ENDS*/                                 \n\
+                                                       \n\
+/*@TRAILER_BEGINS*/                                    \n\
+");