| 1 | /* Startup code for Alpha/ELF. |
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| 2 | Copyright (C) 1993-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | In addition to the permissions in the GNU Lesser General Public |
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| 11 | License, the Free Software Foundation gives you unlimited |
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| 12 | permission to link the compiled version of this file with other |
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| 13 | programs, and to distribute those programs without any restriction |
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| 14 | coming from the use of this file. (The GNU Lesser General Public |
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| 15 | License restrictions do apply in other respects; for example, they |
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| 16 | cover modification of the file, and distribution when not linked |
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| 17 | into another program.) |
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| 18 | |
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| 19 | Note that people who make modified versions of this file are not |
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| 20 | obligated to grant this special exception for their modified |
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| 21 | versions; it is their choice whether to do so. The GNU Lesser |
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| 22 | General Public License gives permission to release a modified |
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| 23 | version without this exception; this exception also makes it |
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| 24 | possible to release a modified version which carries forward this |
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| 25 | exception. |
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| 26 | |
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| 27 | The GNU C Library is distributed in the hope that it will be useful, |
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| 28 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 30 | Lesser General Public License for more details. |
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| 31 | |
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| 32 | You should have received a copy of the GNU Lesser General Public |
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| 33 | License along with the GNU C Library. If not, see |
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| 34 | <https://www.gnu.org/licenses/>. */ |
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| 35 | |
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| 36 | #include <sysdep.h> |
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| 37 | |
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| 38 | .text |
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| 39 | .align 3 |
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| 40 | .globl _start |
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| 41 | .ent _start, 0 |
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| 42 | .type _start,@function |
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| 43 | _start: |
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| 44 | .frame $15, 0, $15 |
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| 45 | br gp, 1f |
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| 46 | 1: ldgp gp, 0(gp) |
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| 47 | subq sp, 16, sp |
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| 48 | mov 0, $15 |
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| 49 | .prologue 0 |
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| 50 | |
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| 51 | /* Load address of the user's main function. */ |
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| 52 | lda a0, main |
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| 53 | |
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| 54 | ldl a1, 16(sp) /* get argc */ |
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| 55 | lda a2, 24(sp) /* get argv */ |
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| 56 | |
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| 57 | mov $r31, a3 /* Used to be init. */ |
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| 58 | mov $r31, a4 /* Used to be fini. */ |
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| 59 | |
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| 60 | /* Store address of the shared library termination function. */ |
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| 61 | mov v0, a5 |
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| 62 | |
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| 63 | /* Provide the highest stack address to the user code. */ |
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| 64 | stq sp, 0(sp) |
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| 65 | |
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| 66 | /* Call the user's main function, and exit with its value. |
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| 67 | But let the libc call main. */ |
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| 68 | jsr ra, __libc_start_main |
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| 69 | |
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| 70 | /* Die very horribly if exit returns. Call_pal hlt is callable from |
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| 71 | kernel mode only; this will result in an illegal instruction trap. */ |
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| 72 | call_pal 0 |
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| 73 | .end _start |
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| 74 | |
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| 75 | /* For ECOFF backwards compatibility. */ |
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| 76 | weak_alias (_start, __start) |
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| 77 | |
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| 78 | /* Define a symbol for the first piece of initialized data. */ |
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| 79 | .data |
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| 80 | .globl __data_start |
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| 81 | __data_start: |
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| 82 | .weak data_start |
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| 83 | data_start = __data_start |
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| 84 | |
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