| /* Special .init and .fini section support for Alpha. |
| Copyright (C) 2001-2014 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. |
| |
| In addition to the permissions in the GNU Lesser 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 GNU Lesser 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.) |
| |
| Note that people who make modified versions of this file are not |
| obligated to grant this special exception for their modified |
| versions; it is their choice whether to do so. The GNU Lesser |
| General Public License gives permission to release a modified |
| version without this exception; this exception also makes it |
| possible to release a modified version which carries forward this |
| exception. |
| |
| 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* 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. The symbols _init and _fini are |
| magic and cause the linker to emit DT_INIT and DT_FINI. |
| |
| This differs from what would be generated for ordinary 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. */ |
| |
| #include <libc-symbols.h> |
| #include <sysdep.h> |
| |
| #ifndef PREINIT_FUNCTION |
| # define PREINIT_FUNCTION __gmon_start__ |
| #endif |
| |
| #ifndef PREINIT_FUNCTION_WEAK |
| # define PREINIT_FUNCTION_WEAK 1 |
| #endif |
| |
| #if PREINIT_FUNCTION_WEAK |
| weak_extern (PREINIT_FUNCTION) |
| #else |
| .hidden PREINIT_FUNCTION |
| #endif |
| |
| .section .init, "ax", @progbits |
| .globl _init |
| .type _init, @function |
| .usepv _init, std |
| _init: |
| ldgp $29, 0($27) |
| subq $30, 16, $30 |
| #if PREINIT_FUNCTION_WEAK |
| lda $27, PREINIT_FUNCTION |
| #endif |
| stq $26, 0($30) |
| stq $29, 8($30) |
| #if PREINIT_FUNCTION_WEAK |
| beq $27, 1f |
| jsr $26, ($27), PREINIT_FUNCTION |
| ldq $29, 8($30) |
| 1: |
| #else |
| bsr $26, PREINIT_FUNCTION !samegp |
| #endif |
| .p2align 3 |
| |
| .section .fini, "ax", @progbits |
| .globl _fini |
| .type _fini,@function |
| .usepv _fini,std |
| _fini: |
| ldgp $29, 0($27) |
| subq $30, 16, $30 |
| stq $26, 0($30) |
| stq $29, 8($30) |
| .p2align 3 |
