projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2b778ceb | 1 | /* Copyright (C) 1999-2021 Free Software Foundation, Inc. |
| d5efd131 MF |
2 | This file is part of the GNU C Library. |
| 3 | Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999. | |
| 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 | |
| 75efb018 | 33 | License along with the GNU C Library; if not, see |
| 5a82c748 | 34 | <https://www.gnu.org/licenses/>. */ |
| d5efd131 MF |
35 | |
| 36 | #include <sysdep.h> | |
| 37 | ||
| d5efd131 MF |
38 | #include <asm/fpu.h> |
| 39 | ||
| 40 | /* | |
| 41 | * Arguments for __libc_start_main: | |
| 42 | * out0: main | |
| 43 | * out1: argc | |
| 44 | * out2: argv | |
| 45 | * out3: init | |
| 46 | * out4: fini | |
| 47 | * out5: rtld_fini | |
| 48 | * out6: stack_end | |
| 49 | */ | |
| 50 | ||
| 51 | .align 32 | |
| 52 | .global _start | |
| 53 | ||
| 54 | .proc _start | |
| 55 | .type _start,@function | |
| 56 | _start: | |
| 57 | .prologue | |
| 58 | .save rp, r0 | |
| 59 | .body | |
| 60 | .prologue | |
| 61 | { .mlx | |
| 62 | alloc r2 = ar.pfs,0,0,7,0 | |
| 63 | movl r3 = FPSR_DEFAULT | |
| 64 | } | |
| 65 | { .mlx | |
| 66 | adds out2 = 16, sp /* get address of argc value */ | |
| 67 | movl gp = @gprel(0f) | |
| 68 | ;; | |
| 69 | } | |
| 70 | 0: { .mmi | |
| 71 | ld8 out1 = [out2], 8 /* load argc and move out2 to become argv */ | |
| 72 | mov.m r10 = ar.bsp /* fetch rbs base address */ | |
| 73 | mov r9 = ip | |
| 74 | ;; | |
| 75 | } | |
| 76 | { .mii | |
| 77 | mov ar.fpsr = r3 | |
| 78 | sub gp = r9, gp /* back-compute gp value */ | |
| 79 | adds out6 = 16, sp /* highest non-environment stack address */ | |
| 80 | ;; | |
| 81 | } | |
| 82 | { | |
| 83 | addl r11 = @ltoff(__libc_ia64_register_backing_store_base), gp | |
| 84 | addl out0 = @ltoff(@fptr(main)), gp | |
| 85 | addl out3 = @ltoff(@fptr(__libc_csu_init)), gp | |
| 86 | ;; | |
| 87 | } | |
| 88 | { .mmi | |
| 89 | ld8 r3 = [r11] /* pointer to __libc_ia64_register_backing_store_base */ | |
| 90 | ld8 out0 = [out0] /* pointer to `main' function descriptor */ | |
| 91 | addl out4 = @ltoff(@fptr(__libc_csu_fini)), gp | |
| 92 | ;; | |
| 93 | } | |
| 94 | { .mmi | |
| 95 | ld8 out3 = [out3] /* pointer to `init' function descriptor */ | |
| 96 | ld8 out4 = [out4] /* pointer to `fini' function descriptor */ | |
| 97 | nop 0 | |
| 98 | } | |
| 99 | .body | |
| 100 | { .mib | |
| 101 | st8 [r3] = r10 | |
| 102 | mov out5 = ret0 /* dynamic linker destructor */ | |
| 103 | br.call.sptk.few rp = __libc_start_main | |
| 104 | } | |
| 105 | { .mib | |
| 106 | break 0 /* break miserably if we ever return */ | |
| 107 | } | |
| 108 | .endp _start | |
| 109 | ||
| 110 | /* Define a symbol for the first piece of initialized data. */ | |
| 111 | .data | |
| 112 | .globl __data_start | |
| 113 | __data_start: | |
| 114 | .long 0 | |
| 115 | .weak data_start | |
| 116 | data_start = __data_start | |
| 117 | ||
| 118 | .common __libc_ia64_register_backing_store_base, 8, 8 |