| 1 | /* |
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| 2 | * Copyright (c) 2011 Aeroflex Gaisler |
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| 3 | * |
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| 4 | * BSD license: |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 7 | * of this software and associated documentation files (the "Software"), to deal |
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| 8 | * in the Software without restriction, including without limitation the rights |
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| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 10 | * copies of the Software, and to permit persons to whom the Software is |
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| 11 | * furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included in |
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| 14 | * all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 22 | * THE SOFTWARE. |
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| 23 | */ |
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| 24 | |
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| 25 | |
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| 26 | .text |
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| 27 | .global _start, main, _end |
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| 28 | |
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| 29 | _start: |
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| 30 | |
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| 31 | #ifndef _FLAT |
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| 32 | save %sp, -64, %sp |
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| 33 | #else |
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| 34 | add %sp, -72, %sp |
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| 35 | st %o7, [%sp+64] |
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| 36 | #endif |
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| 37 | /* clear the bss */ |
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| 38 | |
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| 39 | sethi %hi(__bss_start),%g2 |
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| 40 | or %g2,%lo(__bss_start),%g2 ! g2 = start of bss |
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| 41 | sethi %hi(_end),%g3 |
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| 42 | or %g3,%lo(_end),%g3 ! g3 = end of bss |
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| 43 | mov %g0,%g1 ! so std has two zeros |
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| 44 | sub %g3, %g2, %g3 |
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| 45 | zerobss: |
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| 46 | subcc %g3, 8, %g3 |
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| 47 | bge,a zerobss |
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| 48 | std %g0,[%g2+%g3] |
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| 49 | |
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| 50 | set _end, %o0 |
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| 51 | st %g0,[%o0] |
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| 52 | |
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| 53 | call bdinit2 |
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| 54 | nop |
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| 55 | |
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| 56 | call prelibchook |
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| 57 | nop |
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| 58 | |
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| 59 | call _call_initcalls /* atexit uses __atexit lock */ |
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| 60 | nop |
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| 61 | |
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| 62 | set _fini, %o0 |
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| 63 | call atexit, 1 |
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| 64 | nop |
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| 65 | |
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| 66 | call _init |
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| 67 | nop |
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| 68 | |
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| 69 | call main |
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| 70 | nop |
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| 71 | call _exit |
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| 72 | nop |
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| 73 | #ifndef _FLAT |
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| 74 | ret |
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| 75 | restore |
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| 76 | #else |
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| 77 | ld [%sp+64], %o7 |
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| 78 | retl |
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| 79 | add %sp, 72, %sp |
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| 80 | #endif |
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| 81 | |
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| 82 | .seg "data" |
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| 83 | .global .bdata |
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| 84 | .bdata: |
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| 85 | .align 8 |
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| 86 | .global _environ |
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| 87 | _environ: |
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| 88 | .word 1 |
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| 89 | |
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| 90 | |
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| 91 | |
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