| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Startup code for Alpha/ELF. |
| 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Richard Henderson <rth@tamu.edu> |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | In addition to the permissions in the GNU Lesser General Public |
| 12 | License, the Free Software Foundation gives you unlimited |
| 13 | permission to link the compiled version of this file with other |
| 14 | programs, and to distribute those programs without any restriction |
| 15 | coming from the use of this file. (The GNU Lesser General Public |
| 16 | License restrictions do apply in other respects; for example, they |
| 17 | cover modification of the file, and distribution when not linked |
| 18 | into another program.) |
| 19 | |
| 20 | Note that people who make modified versions of this file are not |
| 21 | obligated to grant this special exception for their modified |
| 22 | versions; it is their choice whether to do so. The GNU Lesser |
| 23 | General Public License gives permission to release a modified |
| 24 | version without this exception; this exception also makes it |
| 25 | possible to release a modified version which carries forward this |
| 26 | exception. |
| 27 | |
| 28 | The GNU C Library is distributed in the hope that it will be useful, |
| 29 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 30 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 31 | Lesser General Public License for more details. |
| 32 | |
| 33 | You should have received a copy of the GNU Lesser General Public |
| 34 | License along with the GNU C Library. If not, see |
| 35 | <http://www.gnu.org/licenses/>. */ |
| 36 | |
| 37 | #include <sysdep.h> |
| 38 | |
| 39 | .text |
| 40 | .align 3 |
| 41 | .globl _start |
| 42 | .ent _start, 0 |
| 43 | .type _start,@function |
| 44 | _start: |
| 45 | .frame $15, 0, $15 |
| 46 | br gp, 1f |
| 47 | 1: ldgp gp, 0(gp) |
| 48 | subq sp, 16, sp |
| 49 | mov 0, $15 |
| 50 | .prologue 0 |
| 51 | |
| 52 | /* Load address of the user's main function. */ |
| 53 | lda a0, main |
| 54 | |
| 55 | ldl a1, 16(sp) /* get argc */ |
| 56 | lda a2, 24(sp) /* get argv */ |
| 57 | |
| 58 | /* Load address of our own entry points to .fini and .init. */ |
| 59 | lda a3, __libc_csu_init |
| 60 | lda a4, __libc_csu_fini |
| 61 | |
| 62 | /* Store address of the shared library termination function. */ |
| 63 | mov v0, a5 |
| 64 | |
| 65 | /* Provide the highest stack address to the user code. */ |
| 66 | stq sp, 0(sp) |
| 67 | |
| 68 | /* Call the user's main function, and exit with its value. |
| 69 | But let the libc call main. */ |
| 70 | jsr ra, __libc_start_main |
| 71 | |
| 72 | /* Die very horribly if exit returns. Call_pal hlt is callable from |
| 73 | kernel mode only; this will result in an illegal instruction trap. */ |
| 74 | call_pal 0 |
| 75 | .end _start |
| 76 | |
| 77 | /* For ECOFF backwards compatibility. */ |
| 78 | weak_alias (_start, __start) |
| 79 | |
| 80 | /* Define a symbol for the first piece of initialized data. */ |
| 81 | .data |
| 82 | .globl __data_start |
| 83 | __data_start: |
| 84 | .weak data_start |
| 85 | data_start = __data_start |