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-rw-r--r--arch/arm26/lib/backtrace.S144
1 files changed, 0 insertions, 144 deletions
diff --git a/arch/arm26/lib/backtrace.S b/arch/arm26/lib/backtrace.S
deleted file mode 100644
index e27feb1e891d..000000000000
--- a/arch/arm26/lib/backtrace.S
+++ /dev/null
@@ -1,144 +0,0 @@
1/*
2 * linux/arch/arm26/lib/backtrace.S
3 *
4 * Copyright (C) 1995, 1996 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#include <linux/linkage.h>
11#include <asm/assembler.h>
12 .text
13
14@ fp is 0 or stack frame
15
16#define frame r4
17#define next r5
18#define save r6
19#define mask r7
20#define offset r8
21
22ENTRY(__backtrace)
23 mov r1, #0x10
24 mov r0, fp
25
26ENTRY(c_backtrace)
27
28#ifdef CONFIG_NO_FRAME_POINTER
29 mov pc, lr
30#else
31
32 stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location...
33 mov mask, #0xfc000003
34 tst mask, r0
35 movne r0, #0
36 movs frame, r0
371: moveq r0, #-2
38 LOADREGS(eqfd, sp!, {r4 - r8, pc})
39
402: stmfd sp!, {pc} @ calculate offset of PC in STMIA instruction
41 ldr r0, [sp], #4
42 adr r1, 2b - 4
43 sub offset, r0, r1
44
453: tst frame, mask @ Check for address exceptions...
46 bne 1b
47
481001: ldr next, [frame, #-12] @ get fp
491002: ldr r2, [frame, #-4] @ get lr
501003: ldr r3, [frame, #0] @ get pc
51 sub save, r3, offset @ Correct PC for prefetching
52 bic save, save, mask
531004: ldr r1, [save, #0] @ get instruction at function
54 mov r1, r1, lsr #10
55 ldr r3, .Ldsi+4
56 teq r1, r3
57 subeq save, save, #4
58 adr r0, .Lfe
59 mov r1, save
60 bic r2, r2, mask
61 bl printk @ print pc and link register
62
63 ldr r0, [frame, #-8] @ get sp
64 sub r0, r0, #4
651005: ldr r1, [save, #4] @ get instruction at function+4
66 mov r3, r1, lsr #10
67 ldr r2, .Ldsi+4
68 teq r3, r2 @ Check for stmia sp!, {args}
69 addeq save, save, #4 @ next instruction
70 bleq .Ldumpstm
71
72 sub r0, frame, #16
731006: ldr r1, [save, #4] @ Get 'stmia sp!, {rlist, fp, ip, lr, pc}' instruction
74 mov r3, r1, lsr #10
75 ldr r2, .Ldsi
76 teq r3, r2
77 bleq .Ldumpstm
78
79 teq frame, next
80 movne frame, next
81 teqne frame, #0
82 bne 3b
83 LOADREGS(fd, sp!, {r4 - r8, pc})
84
85/*
86 * Fixup for LDMDB
87 */
88 .section .fixup,"ax"
89 .align 0
901007: ldr r0, =.Lbad
91 mov r1, frame
92 bl printk
93 LOADREGS(fd, sp!, {r4 - r8, pc})
94 .ltorg
95 .previous
96
97 .section __ex_table,"a"
98 .align 3
99 .long 1001b, 1007b
100 .long 1002b, 1007b
101 .long 1003b, 1007b
102 .long 1004b, 1007b
103 .long 1005b, 1007b
104 .long 1006b, 1007b
105 .previous
106
107#define instr r4
108#define reg r5
109#define stack r6
110
111.Ldumpstm: stmfd sp!, {instr, reg, stack, r7, lr}
112 mov stack, r0
113 mov instr, r1
114 mov reg, #9
115 mov r7, #0
1161: mov r3, #1
117 tst instr, r3, lsl reg
118 beq 2f
119 add r7, r7, #1
120 teq r7, #4
121 moveq r7, #0
122 moveq r3, #'\n'
123 movne r3, #' '
124 ldr r2, [stack], #-4
125 mov r1, reg
126 adr r0, .Lfp
127 bl printk
1282: subs reg, reg, #1
129 bpl 1b
130 teq r7, #0
131 adrne r0, .Lcr
132 blne printk
133 mov r0, stack
134 LOADREGS(fd, sp!, {instr, reg, stack, r7, pc})
135
136.Lfe: .asciz "Function entered at [<%p>] from [<%p>]\n"
137.Lfp: .asciz " r%d = %08X%c"
138.Lcr: .asciz "\n"
139.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
140 .align
141.Ldsi: .word 0x00e92dd8 >> 2
142 .word 0x00e92d00 >> 2
143
144#endif