| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */
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| 2 | /*
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| 3 | * This file contains miscellaneous low-level functions.
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| 4 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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| 5 | *
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| 6 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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| 7 | * and Paul Mackerras.
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| 8 | *
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| 9 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
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| 10 | *
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| 11 | * setjmp/longjmp code by Paul Mackerras.
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| 12 | */
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| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 |
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| 19 | .text
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| 20 |
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| 21 | /*
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| 22 | * Returns (address we are running at) - (address we were linked at)
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| 23 | * for use before the text and data are mapped to KERNELBASE.
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| 24 |
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| 25 | * add_reloc_offset(x) returns x + reloc_offset().
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| 26 | */
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| 27 |
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| 28 | _GLOBAL(reloc_offset)
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| 29 | li r3, 0
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| 30 | _GLOBAL(add_reloc_offset)
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| 31 | mflr r0
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| 32 | bcl 20,31,$+4
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| 33 | 1: mflr r5
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| 34 | PPC_LL r4,(2f-1b)(r5)
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| 35 | subf r5,r4,r5
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| 36 | add r3,r3,r5
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| 37 | mtlr r0
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| 38 | blr
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| 39 | _ASM_NOKPROBE_SYMBOL(reloc_offset)
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| 40 | _ASM_NOKPROBE_SYMBOL(add_reloc_offset)
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| 41 |
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| 42 | .align 3
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| 43 | 2: PPC_LONG 1b
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| 44 |
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| 45 | _GLOBAL(setjmp)
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| 46 | mflr r0
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| 47 | PPC_STL r0,0(r3)
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| 48 | PPC_STL r1,SZL(r3)
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| 49 | PPC_STL r2,2*SZL(r3)
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| 50 | |
| 51 | mfcr r12
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| 52 | stmw r12, 3*SZL(r3)
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| 53 | |
| 54 | mfcr r0
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| 55 | PPC_STL r0,3*SZL(r3)
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| 56 | PPC_STL r13,4*SZL(r3)
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| 57 | PPC_STL r14,5*SZL(r3)
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| 58 | PPC_STL r15,6*SZL(r3)
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| 59 | PPC_STL r16,7*SZL(r3)
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| 60 | PPC_STL r17,8*SZL(r3)
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| 61 | PPC_STL r18,9*SZL(r3)
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| 62 | PPC_STL r19,10*SZL(r3)
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| 63 | PPC_STL r20,11*SZL(r3)
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| 64 | PPC_STL r21,12*SZL(r3)
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| 65 | PPC_STL r22,13*SZL(r3)
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| 66 | PPC_STL r23,14*SZL(r3)
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| 67 | PPC_STL r24,15*SZL(r3)
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| 68 | PPC_STL r25,16*SZL(r3)
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| 69 | PPC_STL r26,17*SZL(r3)
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| 70 | PPC_STL r27,18*SZL(r3)
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| 71 | PPC_STL r28,19*SZL(r3)
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| 72 | PPC_STL r29,20*SZL(r3)
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| 73 | PPC_STL r30,21*SZL(r3)
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| 74 | PPC_STL r31,22*SZL(r3)
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| 75 | |
| 76 | li r3,0
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| 77 | blr
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| 78 |
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| 79 | _GLOBAL(longjmp)
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| 80 | |
| 81 | lmw r12, 3*SZL(r3)
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| 82 | mtcrf 0x38, r12
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| 83 | |
| 84 | PPC_LL r13,4*SZL(r3)
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| 85 | PPC_LL r14,5*SZL(r3)
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| 86 | PPC_LL r15,6*SZL(r3)
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| 87 | PPC_LL r16,7*SZL(r3)
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| 88 | PPC_LL r17,8*SZL(r3)
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| 89 | PPC_LL r18,9*SZL(r3)
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| 90 | PPC_LL r19,10*SZL(r3)
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| 91 | PPC_LL r20,11*SZL(r3)
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| 92 | PPC_LL r21,12*SZL(r3)
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| 93 | PPC_LL r22,13*SZL(r3)
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| 94 | PPC_LL r23,14*SZL(r3)
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| 95 | PPC_LL r24,15*SZL(r3)
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| 96 | PPC_LL r25,16*SZL(r3)
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| 97 | PPC_LL r26,17*SZL(r3)
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| 98 | PPC_LL r27,18*SZL(r3)
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| 99 | PPC_LL r28,19*SZL(r3)
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| 100 | PPC_LL r29,20*SZL(r3)
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| 101 | PPC_LL r30,21*SZL(r3)
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| 102 | PPC_LL r31,22*SZL(r3)
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| 103 | PPC_LL r0,3*SZL(r3)
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| 104 | mtcrf 0x38,r0
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| 105 | |
| 106 | PPC_LL r0,0(r3)
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| 107 | PPC_LL r1,SZL(r3)
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| 108 | PPC_LL r2,2*SZL(r3)
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| 109 | mtlr r0
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| 110 | mr. r3, r4
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| 111 | bnelr
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| 112 | li r3, 1
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| 113 | blr
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| 114 |
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| 115 | _GLOBAL(current_stack_frame)
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| 116 | PPC_LL r3,0(r1)
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| 117 | blr
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| 118 | EXPORT_SYMBOL(current_stack_frame)
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