diff options
Diffstat (limited to 'arch/arm26/lib/backtrace.S')
-rw-r--r-- | arch/arm26/lib/backtrace.S | 144 |
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 | |||
22 | ENTRY(__backtrace) | ||
23 | mov r1, #0x10 | ||
24 | mov r0, fp | ||
25 | |||
26 | ENTRY(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 | ||
37 | 1: moveq r0, #-2 | ||
38 | LOADREGS(eqfd, sp!, {r4 - r8, pc}) | ||
39 | |||
40 | 2: 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 | |||
45 | 3: tst frame, mask @ Check for address exceptions... | ||
46 | bne 1b | ||
47 | |||
48 | 1001: ldr next, [frame, #-12] @ get fp | ||
49 | 1002: ldr r2, [frame, #-4] @ get lr | ||
50 | 1003: ldr r3, [frame, #0] @ get pc | ||
51 | sub save, r3, offset @ Correct PC for prefetching | ||
52 | bic save, save, mask | ||
53 | 1004: 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 | ||
65 | 1005: 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 | ||
73 | 1006: 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 | ||
90 | 1007: 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 | ||
116 | 1: 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 | ||
128 | 2: 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 | ||