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1/*
2 * This file contains miscellaneous low-level functions.
3 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
4 *
5 * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
6 * and Paul Mackerras.
7 *
8 * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
9 *
10 * setjmp/longjmp code by Paul Mackerras.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17#include <asm/ppc_asm.h>
18#include <asm/unistd.h>
19#include <asm/asm-compat.h>
20#include <asm/asm-offsets.h>
21#include <asm/export.h>
22
23 .text
24
25/*
26 * Returns (address we are running at) - (address we were linked at)
27 * for use before the text and data are mapped to KERNELBASE.
28 */
29
30_GLOBAL(reloc_offset)
31 mflr r0
32 bl 1f
331: mflr r3
34 PPC_LL r4,(2f-1b)(r3)
35 subf r3,r4,r3
36 mtlr r0
37 blr
38
39 .align 3
402: PPC_LONG 1b
41
42/*
43 * add_reloc_offset(x) returns x + reloc_offset().
44 */
45_GLOBAL(add_reloc_offset)
46 mflr r0
47 bl 1f
481: mflr r5
49 PPC_LL r4,(2f-1b)(r5)
50 subf r5,r4,r5
51 add r3,r3,r5
52 mtlr r0
53 blr
54
55 .align 3
562: PPC_LONG 1b
57
58_GLOBAL(setjmp)
59 mflr r0
60 PPC_STL r0,0(r3)
61 PPC_STL r1,SZL(r3)
62 PPC_STL r2,2*SZL(r3)
63 mfcr r0
64 PPC_STL r0,3*SZL(r3)
65 PPC_STL r13,4*SZL(r3)
66 PPC_STL r14,5*SZL(r3)
67 PPC_STL r15,6*SZL(r3)
68 PPC_STL r16,7*SZL(r3)
69 PPC_STL r17,8*SZL(r3)
70 PPC_STL r18,9*SZL(r3)
71 PPC_STL r19,10*SZL(r3)
72 PPC_STL r20,11*SZL(r3)
73 PPC_STL r21,12*SZL(r3)
74 PPC_STL r22,13*SZL(r3)
75 PPC_STL r23,14*SZL(r3)
76 PPC_STL r24,15*SZL(r3)
77 PPC_STL r25,16*SZL(r3)
78 PPC_STL r26,17*SZL(r3)
79 PPC_STL r27,18*SZL(r3)
80 PPC_STL r28,19*SZL(r3)
81 PPC_STL r29,20*SZL(r3)
82 PPC_STL r30,21*SZL(r3)
83 PPC_STL r31,22*SZL(r3)
84 li r3,0
85 blr
86
87_GLOBAL(longjmp)
88 PPC_LCMPI r4,0
89 bne 1f
90 li r4,1
911: PPC_LL r13,4*SZL(r3)
92 PPC_LL r14,5*SZL(r3)
93 PPC_LL r15,6*SZL(r3)
94 PPC_LL r16,7*SZL(r3)
95 PPC_LL r17,8*SZL(r3)
96 PPC_LL r18,9*SZL(r3)
97 PPC_LL r19,10*SZL(r3)
98 PPC_LL r20,11*SZL(r3)
99 PPC_LL r21,12*SZL(r3)
100 PPC_LL r22,13*SZL(r3)
101 PPC_LL r23,14*SZL(r3)
102 PPC_LL r24,15*SZL(r3)
103 PPC_LL r25,16*SZL(r3)
104 PPC_LL r26,17*SZL(r3)
105 PPC_LL r27,18*SZL(r3)
106 PPC_LL r28,19*SZL(r3)
107 PPC_LL r29,20*SZL(r3)
108 PPC_LL r30,21*SZL(r3)
109 PPC_LL r31,22*SZL(r3)
110 PPC_LL r0,3*SZL(r3)
111 mtcrf 0x38,r0
112 PPC_LL r0,0(r3)
113 PPC_LL r1,SZL(r3)
114 PPC_LL r2,2*SZL(r3)
115 mtlr r0
116 mr r3,r4
117 blr
118
119_GLOBAL(current_stack_pointer)
120 PPC_LL r3,0(r1)
121 blr
122EXPORT_SYMBOL(current_stack_pointer)
1/*
2 * This file contains miscellaneous low-level functions.
3 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
4 *
5 * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
6 * and Paul Mackerras.
7 *
8 * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
9 *
10 * setjmp/longjmp code by Paul Mackerras.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17#include <asm/ppc_asm.h>
18#include <asm/unistd.h>
19#include <asm/asm-compat.h>
20#include <asm/asm-offsets.h>
21
22 .text
23
24/*
25 * Returns (address we are running at) - (address we were linked at)
26 * for use before the text and data are mapped to KERNELBASE.
27 */
28
29_GLOBAL(reloc_offset)
30 mflr r0
31 bl 1f
321: mflr r3
33 PPC_LL r4,(2f-1b)(r3)
34 subf r3,r4,r3
35 mtlr r0
36 blr
37
38 .align 3
392: PPC_LONG 1b
40
41/*
42 * add_reloc_offset(x) returns x + reloc_offset().
43 */
44_GLOBAL(add_reloc_offset)
45 mflr r0
46 bl 1f
471: mflr r5
48 PPC_LL r4,(2f-1b)(r5)
49 subf r5,r4,r5
50 add r3,r3,r5
51 mtlr r0
52 blr
53
54 .align 3
552: PPC_LONG 1b
56
57_GLOBAL(setjmp)
58 mflr r0
59 PPC_STL r0,0(r3)
60 PPC_STL r1,SZL(r3)
61 PPC_STL r2,2*SZL(r3)
62 mfcr r0
63 PPC_STL r0,3*SZL(r3)
64 PPC_STL r13,4*SZL(r3)
65 PPC_STL r14,5*SZL(r3)
66 PPC_STL r15,6*SZL(r3)
67 PPC_STL r16,7*SZL(r3)
68 PPC_STL r17,8*SZL(r3)
69 PPC_STL r18,9*SZL(r3)
70 PPC_STL r19,10*SZL(r3)
71 PPC_STL r20,11*SZL(r3)
72 PPC_STL r21,12*SZL(r3)
73 PPC_STL r22,13*SZL(r3)
74 PPC_STL r23,14*SZL(r3)
75 PPC_STL r24,15*SZL(r3)
76 PPC_STL r25,16*SZL(r3)
77 PPC_STL r26,17*SZL(r3)
78 PPC_STL r27,18*SZL(r3)
79 PPC_STL r28,19*SZL(r3)
80 PPC_STL r29,20*SZL(r3)
81 PPC_STL r30,21*SZL(r3)
82 PPC_STL r31,22*SZL(r3)
83 li r3,0
84 blr
85
86_GLOBAL(longjmp)
87 PPC_LCMPI r4,0
88 bne 1f
89 li r4,1
901: PPC_LL r13,4*SZL(r3)
91 PPC_LL r14,5*SZL(r3)
92 PPC_LL r15,6*SZL(r3)
93 PPC_LL r16,7*SZL(r3)
94 PPC_LL r17,8*SZL(r3)
95 PPC_LL r18,9*SZL(r3)
96 PPC_LL r19,10*SZL(r3)
97 PPC_LL r20,11*SZL(r3)
98 PPC_LL r21,12*SZL(r3)
99 PPC_LL r22,13*SZL(r3)
100 PPC_LL r23,14*SZL(r3)
101 PPC_LL r24,15*SZL(r3)
102 PPC_LL r25,16*SZL(r3)
103 PPC_LL r26,17*SZL(r3)
104 PPC_LL r27,18*SZL(r3)
105 PPC_LL r28,19*SZL(r3)
106 PPC_LL r29,20*SZL(r3)
107 PPC_LL r30,21*SZL(r3)
108 PPC_LL r31,22*SZL(r3)
109 PPC_LL r0,3*SZL(r3)
110 mtcrf 0x38,r0
111 PPC_LL r0,0(r3)
112 PPC_LL r1,SZL(r3)
113 PPC_LL r2,2*SZL(r3)
114 mtlr r0
115 mr r3,r4
116 blr
117
118_GLOBAL(current_stack_pointer)
119 PPC_LL r3,0(r1)
120 blr