| 1 |
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| 2 | #ifndef __ASM_STACKTRACE_FRAME_H
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| 3 | #define __ASM_STACKTRACE_FRAME_H
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| 4 |
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| 5 | |
| 6 | * - FRAME_META_TYPE_NONE
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| 7 | *
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| 8 | * This value is reserved.
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| 9 | *
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| 10 | * - FRAME_META_TYPE_FINAL
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| 11 | *
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| 12 | * The record is the last entry on the stack.
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| 13 | * Unwinding should terminate successfully.
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| 14 | *
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| 15 | * - FRAME_META_TYPE_PT_REGS
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| 16 | *
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| 17 | * The record is embedded within a struct pt_regs, recording the registers at
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| 18 | * an arbitrary point in time.
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| 19 | * Unwinding should consume pt_regs::pc, followed by pt_regs::lr.
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| 20 | *
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| 21 | * Note: all other values are reserved and should result in unwinding
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| 22 | * terminating with an error.
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| 23 |
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| 24 | #define FRAME_META_TYPE_NONE 0
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| 25 | #define FRAME_META_TYPE_FINAL 1
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| 26 | #define FRAME_META_TYPE_PT_REGS 2
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| 27 |
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| 28 | #ifndef __ASSEMBLER__
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| 29 | |
| 30 | * A standard AAPCS64 frame record.
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| 31 |
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| 32 | struct frame_record {
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| 33 | u64 fp;
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| 34 | u64 lr;
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| 35 | };
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| 36 |
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| 37 | |
| 38 | * A metadata frame record indicating a special unwind.
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| 39 | * The record::{fp,lr} fields must be zero to indicate the presence of
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| 40 | * metadata.
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| 41 |
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| 42 | struct frame_record_meta {
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| 43 | struct frame_record record;
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| 44 | u64 type;
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| 45 | };
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| 46 | #endif
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| 47 |
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| 48 | #endif
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