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1 | #include <linux/linkage.h> |
2 | #include <asm/assembler.h> |
3 | #include "abort-macro.S" |
4 | /* |
5 | * Function: v4t_early_abort |
6 | * |
7 | * Params : r2 = address of aborted instruction |
8 | * : r3 = saved SPSR |
9 | * |
10 | * Returns : r0 = address of abort |
11 | * : r1 = FSR, bit 11 = write |
12 | * : r2-r8 = corrupted |
13 | * : r9 = preserved |
14 | * : sp = pointer to registers |
15 | * |
16 | * Purpose : obtain information about current aborted instruction. |
17 | * Note: we read user space. This means we might cause a data |
18 | * abort here if the I-TLB and D-TLB aren't seeing the same |
19 | * picture. Unfortunately, this does happen. We live with it. |
20 | */ |
21 | .align 5 |
22 | ENTRY(v4t_early_abort) |
23 | mrc p15, 0, r1, c5, c0, 0 @ get FSR |
24 | mrc p15, 0, r0, c6, c0, 0 @ get FAR |
25 | do_thumb_abort |
26 | ldreq r3, [r2] @ read aborted ARM instruction |
27 | bic r1, r1, #1 << 11 | 1 << 10 @ clear bits 11 and 10 of FSR |
28 | tst r3, #1 << 20 @ check write |
29 | orreq r1, r1, #1 << 11 |
30 | mov pc, lr |
31 |
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od-2011-09-04
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v2.6.34-rc5
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v3.9