projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 538c451b | 1 | /* Special .init and .fini section support for tile. |
| b168057a | 2 | Copyright (C) 2012-2015 Free Software Foundation, Inc. |
| 538c451b CM |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | In addition to the permissions in the GNU Lesser General Public | |
| 11 | License, the Free Software Foundation gives you unlimited | |
| 12 | permission to link the compiled version of this file with other | |
| 13 | programs, and to distribute those programs without any restriction | |
| 14 | coming from the use of this file. (The GNU Lesser General Public | |
| 15 | License restrictions do apply in other respects; for example, they | |
| 16 | cover modification of the file, and distribution when not linked | |
| 17 | into another program.) | |
| 18 | ||
| 19 | Note that people who make modified versions of this file are not | |
| 20 | obligated to grant this special exception for their modified | |
| 21 | versions; it is their choice whether to do so. The GNU Lesser | |
| 22 | General Public License gives permission to release a modified | |
| 23 | version without this exception; this exception also makes it | |
| 24 | possible to release a modified version which carries forward this | |
| 25 | exception. | |
| 26 | ||
| 27 | The GNU C Library is distributed in the hope that it will be useful, | |
| 28 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 30 | Lesser General Public License for more details. | |
| 31 | ||
| 32 | You should have received a copy of the GNU Lesser General Public | |
| 33 | License along with the GNU C Library; if not, see | |
| 34 | <http://www.gnu.org/licenses/>. */ | |
| 35 | ||
| 36 | /* crti.S puts a function prologue at the beginning of the .init and | |
| 37 | .fini sections and defines global symbols for those addresses, so | |
| 38 | they can be called as functions. The symbols _init and _fini are | |
| 39 | magic and cause the linker to emit DT_INIT and DT_FINI. */ | |
| 40 | ||
| 41 | #include <libc-symbols.h> | |
| 42 | #include <sysdep.h> | |
| 43 | ||
| 44 | #ifndef PREINIT_FUNCTION | |
| 45 | # define PREINIT_FUNCTION __gmon_start__ | |
| 46 | #endif | |
| 47 | ||
| 48 | #ifndef PREINIT_FUNCTION_WEAK | |
| 49 | # define PREINIT_FUNCTION_WEAK 1 | |
| 50 | #endif | |
| 51 | ||
| 52 | #if PREINIT_FUNCTION_WEAK | |
| 53 | weak_extern (PREINIT_FUNCTION) | |
| 54 | #else | |
| 55 | .hidden PREINIT_FUNCTION | |
| 56 | #endif | |
| 57 | ||
| 58 | .section .init,"ax",@progbits | |
| 59 | .align 8 | |
| 60 | .globl _init | |
| 61 | .type _init, @function | |
| 62 | _init: | |
| 63 | { | |
| 64 | move r29, sp | |
| 65 | ADDI_PTR r28, sp, -REGSIZE | |
| 66 | ST sp, lr | |
| 67 | } | |
| 68 | ADDI_PTR sp, sp, -(2 * REGSIZE) | |
| 69 | ST r28, r29 | |
| 70 | #if PREINIT_FUNCTION_WEAK | |
| 71 | lnk r2 | |
| 72 | 0: | |
| fedff589 CM |
73 | # ifdef __tilegx__ |
| 74 | moveli r1, hw2_last(_GLOBAL_OFFSET_TABLE_ - 0b) | |
| 538c451b | 75 | { |
| fedff589 | 76 | shl16insli r1, r1, hw1(_GLOBAL_OFFSET_TABLE_ - 0b) |
| 538c451b CM |
77 | moveli r0, hw1_last_got(PREINIT_FUNCTION) |
| 78 | } | |
| 79 | { | |
| 80 | shl16insli r1, r1, hw0(_GLOBAL_OFFSET_TABLE_ - 0b) | |
| 81 | shl16insli r0, r0, hw0_got(PREINIT_FUNCTION) | |
| 82 | } | |
| fedff589 | 83 | # else |
| 538c451b CM |
84 | { |
| 85 | moveli r1, lo16(_GLOBAL_OFFSET_TABLE_ - 0b) | |
| 86 | moveli r0, got_lo16(PREINIT_FUNCTION) | |
| 87 | } | |
| 88 | { | |
| 89 | auli r1, r1, ha16(_GLOBAL_OFFSET_TABLE_ - 0b) | |
| 90 | auli r0, r0, got_ha16(PREINIT_FUNCTION) | |
| 91 | } | |
| fedff589 | 92 | # endif |
| 538c451b CM |
93 | ADD_PTR r0, r0, r1 |
| 94 | ADD_PTR r0, r0, r2 | |
| 95 | LD_PTR r0, r0 | |
| 96 | BEQZ r0, .Lno_weak_fn | |
| fedff589 | 97 | jalr r0 |
| 86bd05fb | 98 | #elif defined(__tilegx__) && !defined(NO_PLT_PCREL) |
| fedff589 CM |
99 | /* Since we are calling from the start of the object to the PLT, |
| 100 | call by loading the full address into a register. */ | |
| 101 | lnk r2 | |
| 102 | 0: | |
| 103 | moveli r0, hw2_last_plt(PREINIT_FUNCTION - 0b) | |
| 104 | shl16insli r0, r0, hw1_plt(PREINIT_FUNCTION - 0b) | |
| 105 | shl16insli r0, r0, hw0_plt(PREINIT_FUNCTION - 0b) | |
| 106 | add r0, r0, r2 | |
| 107 | jalr r0 | |
| 108 | #else | |
| 538c451b | 109 | jal plt(PREINIT_FUNCTION) |
| fedff589 | 110 | #endif |
| 538c451b CM |
111 | .Lno_weak_fn: |
| 112 | ||
| 113 | .section .fini,"ax",@progbits | |
| 114 | .align 8 | |
| 115 | .globl _fini | |
| 116 | .type _fini, @function | |
| 117 | _fini: | |
| 118 | { | |
| 119 | move r29, sp | |
| 120 | ADDI_PTR r28, sp, -REGSIZE | |
| 121 | ST sp, lr | |
| 122 | } | |
| 123 | ADDI_PTR sp, sp, -(2 * REGSIZE) | |
| 124 | ST r28, r29 |