[444] | 1 | /* |
---|
| 2 | * Copyright (c) 2011 Aeroflex Gaisler |
---|
| 3 | * |
---|
| 4 | * BSD license: |
---|
| 5 | * |
---|
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
---|
| 7 | * of this software and associated documentation files (the "Software"), to deal |
---|
| 8 | * in the Software without restriction, including without limitation the rights |
---|
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
---|
| 10 | * copies of the Software, and to permit persons to whom the Software is |
---|
| 11 | * furnished to do so, subject to the following conditions: |
---|
| 12 | * |
---|
| 13 | * The above copyright notice and this permission notice shall be included in |
---|
| 14 | * all copies or substantial portions of the Software. |
---|
| 15 | * |
---|
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
---|
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
---|
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
---|
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
---|
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
---|
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
---|
| 22 | * THE SOFTWARE. |
---|
| 23 | */ |
---|
| 24 | |
---|
| 25 | |
---|
| 26 | .text |
---|
| 27 | .global _start, main, _end |
---|
| 28 | |
---|
| 29 | _start: |
---|
| 30 | |
---|
| 31 | #ifndef _FLAT |
---|
| 32 | save %sp, -64, %sp |
---|
| 33 | #else |
---|
| 34 | add %sp, -72, %sp |
---|
| 35 | st %o7, [%sp+64] |
---|
| 36 | #endif |
---|
| 37 | /* clear the bss */ |
---|
| 38 | |
---|
| 39 | sethi %hi(__bss_start),%g2 |
---|
| 40 | or %g2,%lo(__bss_start),%g2 ! g2 = start of bss |
---|
| 41 | sethi %hi(_end),%g3 |
---|
| 42 | or %g3,%lo(_end),%g3 ! g3 = end of bss |
---|
| 43 | mov %g0,%g1 ! so std has two zeros |
---|
| 44 | sub %g3, %g2, %g3 |
---|
| 45 | zerobss: |
---|
| 46 | subcc %g3, 8, %g3 |
---|
| 47 | bge,a zerobss |
---|
| 48 | std %g0,[%g2+%g3] |
---|
| 49 | |
---|
| 50 | set _end, %o0 |
---|
| 51 | st %g0,[%o0] |
---|
| 52 | |
---|
| 53 | call bdinit2 |
---|
| 54 | nop |
---|
| 55 | |
---|
| 56 | call prelibchook |
---|
| 57 | nop |
---|
| 58 | |
---|
| 59 | call _call_initcalls /* atexit uses __atexit lock */ |
---|
| 60 | nop |
---|
| 61 | |
---|
| 62 | set _fini, %o0 |
---|
| 63 | call atexit, 1 |
---|
| 64 | nop |
---|
| 65 | |
---|
| 66 | call _init |
---|
| 67 | nop |
---|
| 68 | |
---|
| 69 | call main |
---|
| 70 | nop |
---|
| 71 | call _exit |
---|
| 72 | nop |
---|
| 73 | #ifndef _FLAT |
---|
| 74 | ret |
---|
| 75 | restore |
---|
| 76 | #else |
---|
| 77 | ld [%sp+64], %o7 |
---|
| 78 | retl |
---|
| 79 | add %sp, 72, %sp |
---|
| 80 | #endif |
---|
| 81 | |
---|
| 82 | .seg "data" |
---|
| 83 | .global .bdata |
---|
| 84 | .bdata: |
---|
| 85 | .align 8 |
---|
| 86 | .global _environ |
---|
| 87 | _environ: |
---|
| 88 | .word 1 |
---|
| 89 | |
---|
| 90 | |
---|
| 91 | |
---|