[4a238002] | 1 | /* |
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| 2 | * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and |
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| 3 | * Bernd Becker (becker@faw.uni-ulm.de) |
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| 4 | * |
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| 5 | * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany |
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| 6 | * |
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| 7 | * This program is distributed in the hope that it will be useful, |
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| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 10 | * |
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| 11 | * Modified to reflect Hitachi EDK SH7045F: |
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| 12 | * John M. Mills (jmills@tga.com) |
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| 13 | * TGA Technologies, Inc. |
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| 14 | * 100 Pinnacle Way, Suite 140 |
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| 15 | * Norcross, GA 30071 U.S.A. |
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| 16 | * |
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| 17 | * |
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| 18 | * This modified file may be copied and distributed in accordance |
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| 19 | * the above-referenced license. It is provided for critique and |
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| 20 | * developmental purposes without any warranty nor representation |
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| 21 | * by the authors or by TGA Technologies. |
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| 22 | * |
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| 23 | * COPYRIGHT (c) 1999. |
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| 24 | * On-Line Applications Research Corporation (OAR). |
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| 25 | * |
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| 26 | * The license and distribution terms for this file may be |
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| 27 | * found in the file LICENSE in this distribution or at |
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| 28 | * http://www.OARcorp.com/rtems/license.html. |
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| 29 | * |
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| 30 | * $Id$ |
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| 31 | */ |
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| 32 | |
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| 33 | #include "asm.h" |
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| 34 | |
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| 35 | BEGIN_CODE |
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| 36 | PUBLIC(start) |
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| 37 | |
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| 38 | SYM (start): |
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| 39 | ! install the stack pointer |
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| 40 | mov.l stack_k,r15 |
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| 41 | |
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| 42 | #ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */ |
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| 43 | ! Initialize minimal hardware |
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| 44 | mov.l hw_init_k, r0 |
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| 45 | jsr @r0 |
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[df49c60] | 46 | nop !dead slot |
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[4a238002] | 47 | #endif /* START_HW_INIT */ |
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| 48 | |
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| 49 | ! zero out bss |
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| 50 | mov.l edata_k,r0 |
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| 51 | mov.l end_k,r1 |
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| 52 | mov #0,r2 |
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| 53 | 0: |
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| 54 | mov.l r2,@r0 |
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| 55 | add #4,r0 |
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| 56 | cmp/ge r0,r1 |
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| 57 | bt 0b |
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| 58 | |
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| 59 | ! copy the vector table from rom to ram |
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| 60 | mov.l vects_k,r0 ! vectab |
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| 61 | mov #0,r1 ! address of boot vector table |
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| 62 | mov #0,r2 ! number of bytes copied |
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| 63 | mov.w vects_size,r3 ! size of entries in vectab |
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| 64 | 1: |
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| 65 | mov.l @r1+,r4 |
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| 66 | mov.l r4,@r0 |
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| 67 | add #4,r0 |
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| 68 | add #1,r2 |
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| 69 | cmp/hi r3,r2 |
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| 70 | bf 1b |
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| 71 | |
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[df49c60] | 72 | #ifndef STANDALONE_EVB |
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[4a238002] | 73 | ! overlay monitor vectors onto RTEMS table template |
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| 74 | ! code adapted from Hitachi EDK7045F User Manual: "Copyvect.s" |
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| 75 | mova vects_k,r0 |
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| 76 | mov.l @r0, r1 ! Shadow vect tbl addr |
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| 77 | stc vbr, r2 ! Original vect tbl addr |
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| 78 | and #0, r0 |
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| 79 | mov r0, r4 ! 0 in r4 and r0 |
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| 80 | |
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| 81 | !trapa #32 |
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| 82 | or #0x80, r0 |
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| 83 | mov.l @(r0,r2), r3 |
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| 84 | mov.l r3, @(r0, r1) |
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| 85 | mov r4, r0 |
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| 86 | |
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| 87 | !cpu addr err |
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| 88 | or #0x24, r0 |
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| 89 | mov.l @(r0, r2), r3 |
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| 90 | mov.l r3, @(r0, r1) |
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| 91 | mov r4, r0 |
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| 92 | |
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| 93 | !ill slot |
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| 94 | or #0x18, r0 |
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| 95 | mov.l @(r0, r2), r3 |
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| 96 | mov.l r3, @(r0, r1) |
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| 97 | mov r4, r0 |
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| 98 | |
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| 99 | !ill inst |
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| 100 | or #0x10, r0 |
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| 101 | mov.l @(r0, r2), r3 |
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| 102 | mov.l r3, @(r0, r1) |
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| 103 | mov r4, r0 |
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| 104 | |
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| 105 | !nmi |
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| 106 | or #0x2c, r0 |
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| 107 | mov.l @(r0, r2), r3 |
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| 108 | mov.l r3, @(r0, r1) |
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| 109 | mov r4, r0 |
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| 110 | |
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| 111 | !User brk |
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| 112 | or #0x30, r0 |
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| 113 | mov.l @(r0, r2), r3 |
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| 114 | mov.l r3, @(r0, r1) |
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| 115 | mov r4, r0 |
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| 116 | |
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| 117 | !sci0 err |
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| 118 | or #0x80, r0 |
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| 119 | rotl r0 |
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| 120 | rotl r0 |
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| 121 | mov.l @(r0, r2), r3 |
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| 122 | mov.l r3, @(r0, r1) |
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| 123 | mov r4, r0 |
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| 124 | !sci rx |
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| 125 | or #0x81, r0 |
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| 126 | rotl r0 |
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| 127 | rotl r0 |
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| 128 | mov.l @(r0, r2), r3 |
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| 129 | mov.l r3, @(r0, r1) |
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| 130 | |
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| 131 | stc vbr,r3 ! capture copy of monitor vbr |
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| 132 | mov.l vbrtemp_k,r0 |
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| 133 | mov.l r3, @r0 |
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| 134 | mov.l vects_k,r0 ! point vbr to vectab |
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| 135 | ldc r0,vbr |
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[df49c60] | 136 | #endif ! STANDALONE_EVB |
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[4a238002] | 137 | |
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| 138 | ! call the mainline |
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| 139 | mov #0,r4 ! argc |
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| 140 | mov.l main_k,r0 |
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| 141 | jsr @r0 |
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[df49c60] | 142 | mov #0,r5 ! argv - can place in dead slot |
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[4a238002] | 143 | |
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| 144 | ! call exit |
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| 145 | mov r0,r4 |
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| 146 | mov.l exit_k,r0 |
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| 147 | jsr @r0 |
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[df49c60] | 148 | or r0,r0 |
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[4a238002] | 149 | |
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| 150 | mov.l vbrtemp_k,r0 ! restore original vbr |
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| 151 | mov.l @r0,r3 |
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| 152 | ldc r3, vbr |
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| 153 | trapa #13 ! UBR capture by monitor |
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| 154 | nop !debug dead-slot target |
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| 155 | |
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| 156 | END_CODE |
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| 157 | |
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| 158 | .align 2 |
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| 159 | stack_k: |
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| 160 | .long SYM(stack) |
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| 161 | edata_k: |
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| 162 | .long SYM(edata) |
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| 163 | end_k: |
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| 164 | .long SYM(end) |
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| 165 | main_k: |
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| 166 | .long SYM(boot_card) |
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| 167 | exit_k: |
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| 168 | .long SYM(exit) |
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| 169 | #ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */ |
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| 170 | hw_init_k: |
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[df49c60] | 171 | .long SYM(early_hw_init) |
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[4a238002] | 172 | #endif /* START_HW_INIT */ |
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| 173 | vbrtemp_k: |
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| 174 | .long SYM(vbrtemp) |
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| 175 | vects_k: |
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| 176 | .long SYM(vectab) |
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| 177 | vects_size: |
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| 178 | .word 255 |
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| 179 | |
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| 180 | #ifdef __ELF__ |
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| 181 | .section .stack,"aw" |
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| 182 | #else |
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| 183 | .section .stack |
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| 184 | #endif |
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| 185 | SYM(stack): |
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| 186 | .long 0xdeaddead |
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| 187 | |
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| 188 | #ifdef __ELF__ |
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| 189 | .section .bss,"aw" |
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| 190 | #else |
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| 191 | .section .bss |
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| 192 | #endif |
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| 193 | SYM(vbrtemp): |
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| 194 | .long 0x0 |
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| 195 | |
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