| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* ELF startup code for HPPA. |
| 2 | Copyright (C) 2002-2016 Free Software Foundation, Inc. |
| 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 | .import main, code |
| 37 | .import $global$, data |
| 38 | .import __libc_start_main, code |
| 39 | .import __libc_csu_fini, code |
| 40 | .import __libc_csu_init, code |
| 41 | |
| 42 | /* Have the linker create plabel words so we get PLABEL32 |
| 43 | relocs and not 21/14. The use of 21/14 relocs is only |
| 44 | supported in the latest dynamic linker. */ |
| 45 | #ifdef SHARED |
| 46 | .section .data.rel.ro,"aw",@progbits |
| 47 | #else |
| 48 | .section .rodata,"a",@progbits |
| 49 | #endif |
| 50 | .align 4 |
| 51 | .Lpmain: |
| 52 | .word P%main |
| 53 | .Lp__libc_start_main: |
| 54 | .word P%__libc_start_main |
| 55 | .Lp__libc_csu_fini: |
| 56 | .word P%__libc_csu_fini |
| 57 | .Lp__libc_csu_init: |
| 58 | .word P%__libc_csu_init |
| 59 | #ifdef SHARED |
| 60 | .Lp__global: |
| 61 | .word $global$ |
| 62 | #endif |
| 63 | |
| 64 | .text |
| 65 | .align 4 |
| 66 | .globl _start |
| 67 | .export _start, ENTRY |
| 68 | .type _start,@function |
| 69 | _start: |
| 70 | /* At entry to the function we have: |
| 71 | |
| 72 | r26 - Unused |
| 73 | r25 - argc |
| 74 | r24 - argv |
| 75 | r23 - False _dl_fini plabel address |
| 76 | |
| 77 | This function is called from the lower half of RTLD_START. |
| 78 | |
| 79 | The call to __libc_start_main expects: |
| 80 | |
| 81 | 1. r26 - Application main |
| 82 | 2. r25 - argc |
| 83 | 3. r24 - argv |
| 84 | 4. r23 - __libc_csu_init |
| 85 | 5. sp-52 - __libc_csu_fini |
| 86 | 6. sp-56 - rtld_fini |
| 87 | 7. sp-60 - stackend */ |
| 88 | |
| 89 | .proc |
| 90 | .callinfo |
| 91 | /* Clear previous-sp. */ |
| 92 | stw %r0, -4(%sp) |
| 93 | /* Setup the stack and frame. */ |
| 94 | stw %rp, -20(%sp) |
| 95 | ldo 64(%sp), %sp |
| 96 | stw %sp, -4(%sp) |
| 97 | stw %r19, -32(%sp) |
| 98 | |
| 99 | /* argc and argv should be in 25 and 24 (2nd and 3rd argument) */ |
| 100 | /* void (*rtld_fini) (void) (6th argument) */ |
| 101 | stw %r23, -56(%sp) |
| 102 | /* Need to setup 1, 4, 5, and 7th arguments */ |
| 103 | |
| 104 | #ifdef SHARED |
| 105 | /* load main (1st argument) */ |
| 106 | addil LT'.Lpmain, %r19 |
| 107 | ldw RT'.Lpmain(%r1), %r26 |
| 108 | ldw 0(%r26),%r26 |
| 109 | /* void (*init) (void) (4th argument) */ |
| 110 | addil LT'.Lp__libc_csu_init, %r19 |
| 111 | ldw RT'.Lp__libc_csu_init(%r1), %r23 |
| 112 | ldw 0(%r23), %r23 |
| 113 | /* void (*fini) (void) (5th argument) */ |
| 114 | addil LT'.Lp__libc_csu_fini, %r19 |
| 115 | ldw RT'.Lp__libc_csu_fini(%r1), %r22 |
| 116 | ldw 0(%r22), %r22 |
| 117 | #else |
| 118 | /* load main (1st argument) */ |
| 119 | ldil LR'.Lpmain, %r26 |
| 120 | ldw RR'.Lpmain(%r26), %r26 |
| 121 | /* void (*init) (void) (4th argument) */ |
| 122 | ldil LR'.Lp__libc_csu_init, %r23 |
| 123 | ldw RR'.Lp__libc_csu_init(%r23), %r23 |
| 124 | /* void (*fini) (void) (5th argument) */ |
| 125 | ldil LR'.Lp__libc_csu_fini, %r22 |
| 126 | ldw RR'.Lp__libc_csu_fini(%r22), %r22 |
| 127 | #endif |
| 128 | /* Store 5th argument */ |
| 129 | stw %r22, -52(%sp) |
| 130 | /* void *stack_end (7th argument) */ |
| 131 | stw %sp, -60(%sp) |
| 132 | |
| 133 | #ifdef SHARED |
| 134 | addil LT'.Lp__global, %r19 |
| 135 | ldw RT'.Lp__global(%r1), %dp |
| 136 | #else |
| 137 | /* load global */ |
| 138 | ldil L%$global$, %dp |
| 139 | ldo R%$global$(%dp), %dp |
| 140 | #endif |
| 141 | bl __libc_start_main,%r2 |
| 142 | nop |
| 143 | /* die horribly if it returned (it shouldn't) */ |
| 144 | iitlbp %r0,(%sr0,%r0) |
| 145 | nop |
| 146 | |
| 147 | .procend |
| 148 | |
| 149 | /* Define a symbol for the first piece of initialized data. */ |
| 150 | .data |
| 151 | .globl __data_start |
| 152 | __data_start: |
| 153 | .long 0 |
| 154 | .weak data_start |
| 155 | data_start = __data_start |