| 1 | /* Generic simplistic start-up-stub for CRIS/CRISv32. |
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| 2 | Copyright (C) 1993-2005, 2007, 2017 Axis Communications. |
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| 3 | All rights reserved. |
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| 4 | |
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| 5 | Redistribution and use in source and binary forms, with or without |
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| 6 | modification, are permitted provided that the following conditions |
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| 7 | are met: |
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| 8 | |
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| 9 | 1. Redistributions of source code must retain the above copyright |
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| 10 | notice, this list of conditions and the following disclaimer. |
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| 11 | |
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| 12 | 2. Neither the name of Axis Communications nor the names of its |
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| 13 | contributors may be used to endorse or promote products derived |
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| 14 | from this software without specific prior written permission. |
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| 15 | |
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| 16 | THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS |
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| 17 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 18 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| 19 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS |
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| 20 | COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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| 21 | INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 22 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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| 23 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 24 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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| 25 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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| 26 | IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 27 | POSSIBILITY OF SUCH DAMAGE. */ |
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| 28 | |
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| 29 | #include "newlib.h" |
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| 30 | |
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| 31 | #undef cris |
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| 32 | #undef L |
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| 33 | #ifdef __NO_UNDERSCORES__ |
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| 34 | #define L(x) x |
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| 35 | #else |
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| 36 | #define L(x) _ ## x |
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| 37 | #endif |
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| 38 | |
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| 39 | #ifdef HAVE_INITFINI_ARRAY |
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| 40 | #define _init __libc_init_array |
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| 41 | #define _fini __libc_fini_array |
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| 42 | #endif |
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| 43 | |
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| 44 | ; Rudimentary v0..v32-compatible startup stub. |
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| 45 | |
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| 46 | #ifdef __ELF__ |
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| 47 | .section .startup,"ax" |
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| 48 | #endif |
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| 49 | .global __start |
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| 50 | nop |
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| 51 | __start: |
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| 52 | move.d 0f,$r9 |
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| 53 | jump $r9 |
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| 54 | setf |
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| 55 | |
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| 56 | #ifndef __ELF__ |
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| 57 | |
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| 58 | ; For a.out, everything read-only and code-wise goes into a |
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| 59 | ; single section, so we can't separate the interrupt table from |
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| 60 | ; the startup code if we want to have files in-between. |
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| 61 | #define IN_CRT0 |
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| 62 | #include "irqtable.S" |
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| 63 | |
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| 64 | #else |
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| 65 | |
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| 66 | ; The interrupt table (at offset 12, irq #3) is expected here. |
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| 67 | ; The simplest way to make sure we link it in, is to sacrifice |
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| 68 | ; some memory and refer to it with a relocation. |
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| 69 | .text |
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| 70 | .dword __irqtable_at_irq3 |
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| 71 | |
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| 72 | #endif /* __ELF__ */ |
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| 73 | |
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| 74 | 0: |
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| 75 | move.d __setup,$r9 |
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| 76 | jsr $r9 |
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| 77 | nop |
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| 78 | #ifdef __ELF__ |
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| 79 | jsr L(_init) |
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| 80 | nop |
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| 81 | move.d L(_fini),$r10 |
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| 82 | jsr L(atexit) |
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| 83 | nop |
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| 84 | #endif |
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| 85 | jsr L(main) |
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| 86 | nop |
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| 87 | jsr L(exit) |
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| 88 | nop |
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| 89 | 0: |
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| 90 | nop |
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| 91 | ba 0b |
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| 92 | nop |
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