| /* Special .init and .fini section support for IA64. |
| Copyright (C) 2000-2014 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. */ |
| |
| #include <libc-symbols.h> |
| #include <sysdep.h> |
| #undef ret |
| |
| #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 |
| |
| /* 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 */ |
| |
| #if PREINIT_FUNCTION_WEAK |
| /* This blob of assembly code is one simple C function: |
| |
| static void |
| __attribute__ ((used)) |
| gmon_initializer (void) |
| { |
| extern void weak_function __gmon_start__ (void); |
| |
| if (__gmon_start__) |
| (*__gmon_start__)(); |
| } |
| */ |
| .text |
| .align 64 |
| .proc gmon_initializer# |
| gmon_initializer: |
| .prologue 12, 32 |
| .mmi |
| .save ar.pfs, r33 |
| alloc r33 = ar.pfs, 0, 3, 0, 0 |
| addl r14 = @ltoff(@fptr(PREINIT_FUNCTION#)), gp |
| .save rp, r32 |
| mov r32 = b0 |
| .mmi |
| mov r34 = r1 |
| .body |
| ;; |
| ld8 r14 = [r14] |
| nop 0 |
| ;; |
| .mib |
| cmp.eq p6, p7 = 0, r14 |
| nop 0 |
| (p6) br.cond.spnt .L1 |
| ;; |
| .mib |
| nop 0 |
| nop 0 |
| br.call.sptk.many b0 = PREINIT_FUNCTION# |
| ;; |
| .mmi |
| mov r1 = r34 |
| nop 0 |
| nop 0 |
| .L1: |
| .mii |
| nop 0 |
| mov ar.pfs = r33 |
| nop 0 |
| ;; |
| .mib |
| nop 0 |
| mov b0 = r32 |
| br.ret.sptk.many b0 |
| .endp gmon_initializer# |
| # undef PREINIT_FUNCTION |
| # define PREINIT_FUNCTION gmon_initializer |
| #endif |
| .section .init_array, "aw" |
| data8 @fptr(PREINIT_FUNCTION) |
| |
| .section .init,"ax",@progbits |
| .global _init# |
| .proc _init# |
| _init: |
| .prologue |
| .save ar.pfs, r34 |
| alloc r34 = ar.pfs, 0, 3, 0, 0 |
| .vframe r32 |
| mov r32 = r12 |
| .save rp, r33 |
| mov r33 = b0 |
| .body |
| adds r12 = -16, r12 |
| ;; /* see gmon_initializer() above */ |
| .endp _init# |
| |
| .section .fini,"ax",@progbits |
| .global _fini# |
| .proc _fini# |
| _fini: |
| .prologue |
| .save ar.pfs, r34 |
| alloc r34 = ar.pfs, 0, 3, 0, 0 |
| .vframe r32 |
| mov r32 = r12 |
| .save rp, r33 |
| mov r33 = b0 |
| .body |
| adds r12 = -16, r12 |
| ;; |
| .endp _fini# |