| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1999-2016 Free Software Foundation, Inc. |
| 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 |
| 33 | License along with the GNU C Library; if not, see |
| 34 | <http://www.gnu.org/licenses/>. */ |
| 35 | |
| 36 | #include <sysdep.h> |
| 37 | |
| 38 | #include <asm/unistd.h> |
| 39 | #include <asm/fpu.h> |
| 40 | |
| 41 | /* |
| 42 | * Arguments for __libc_start_main: |
| 43 | * out0: main |
| 44 | * out1: argc |
| 45 | * out2: argv |
| 46 | * out3: init |
| 47 | * out4: fini |
| 48 | * out5: rtld_fini |
| 49 | * out6: stack_end |
| 50 | */ |
| 51 | |
| 52 | .align 32 |
| 53 | .global _start |
| 54 | |
| 55 | .proc _start |
| 56 | .type _start,@function |
| 57 | _start: |
| 58 | .prologue |
| 59 | .save rp, r0 |
| 60 | .body |
| 61 | .prologue |
| 62 | { .mlx |
| 63 | alloc r2 = ar.pfs,0,0,7,0 |
| 64 | movl r3 = FPSR_DEFAULT |
| 65 | } |
| 66 | { .mlx |
| 67 | adds out2 = 16, sp /* get address of argc value */ |
| 68 | movl gp = @gprel(0f) |
| 69 | ;; |
| 70 | } |
| 71 | 0: { .mmi |
| 72 | ld8 out1 = [out2], 8 /* load argc and move out2 to become argv */ |
| 73 | mov.m r10 = ar.bsp /* fetch rbs base address */ |
| 74 | mov r9 = ip |
| 75 | ;; |
| 76 | } |
| 77 | { .mii |
| 78 | mov ar.fpsr = r3 |
| 79 | sub gp = r9, gp /* back-compute gp value */ |
| 80 | adds out6 = 16, sp /* highest non-environment stack address */ |
| 81 | ;; |
| 82 | } |
| 83 | { |
| 84 | addl r11 = @ltoff(__libc_ia64_register_backing_store_base), gp |
| 85 | addl out0 = @ltoff(@fptr(main)), gp |
| 86 | addl out3 = @ltoff(@fptr(__libc_csu_init)), gp |
| 87 | ;; |
| 88 | } |
| 89 | { .mmi |
| 90 | ld8 r3 = [r11] /* pointer to __libc_ia64_register_backing_store_base */ |
| 91 | ld8 out0 = [out0] /* pointer to `main' function descriptor */ |
| 92 | addl out4 = @ltoff(@fptr(__libc_csu_fini)), gp |
| 93 | ;; |
| 94 | } |
| 95 | { .mmi |
| 96 | ld8 out3 = [out3] /* pointer to `init' function descriptor */ |
| 97 | ld8 out4 = [out4] /* pointer to `fini' function descriptor */ |
| 98 | nop 0 |
| 99 | } |
| 100 | .body |
| 101 | { .mib |
| 102 | st8 [r3] = r10 |
| 103 | mov out5 = ret0 /* dynamic linker destructor */ |
| 104 | br.call.sptk.few rp = __libc_start_main |
| 105 | } |
| 106 | { .mib |
| 107 | break 0 /* break miserably if we ever return */ |
| 108 | } |
| 109 | .endp _start |
| 110 | |
| 111 | /* Define a symbol for the first piece of initialized data. */ |
| 112 | .data |
| 113 | .globl __data_start |
| 114 | __data_start: |
| 115 | .long 0 |
| 116 | .weak data_start |
| 117 | data_start = __data_start |
| 118 | |
| 119 | .common __libc_ia64_register_backing_store_base, 8, 8 |