diff options
Diffstat (limited to 'arch/arm64/include/asm/stacktrace/frame.h')
| -rw-r--r-- | arch/arm64/include/asm/stacktrace/frame.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/stacktrace/frame.h b/arch/arm64/include/asm/stacktrace/frame.h index 6397bc847f14..0ee0f6ba0fd8 100644 --- a/arch/arm64/include/asm/stacktrace/frame.h +++ b/arch/arm64/include/asm/stacktrace/frame.h @@ -3,6 +3,30 @@ #define __ASM_STACKTRACE_FRAME_H /* + * - FRAME_META_TYPE_NONE + * + * This value is reserved. + * + * - FRAME_META_TYPE_FINAL + * + * The record is the last entry on the stack. + * Unwinding should terminate successfully. + * + * - FRAME_META_TYPE_PT_REGS + * + * The record is embedded within a struct pt_regs, recording the registers at + * an arbitrary point in time. + * Unwinding should consume pt_regs::pc, followed by pt_regs::lr. + * + * Note: all other values are reserved and should result in unwinding + * terminating with an error. + */ +#define FRAME_META_TYPE_NONE 0 +#define FRAME_META_TYPE_FINAL 1 +#define FRAME_META_TYPE_PT_REGS 2 + +#ifndef __ASSEMBLY__ +/* * A standard AAPCS64 frame record. */ struct frame_record { @@ -10,4 +34,15 @@ struct frame_record { u64 lr; }; +/* + * A metadata frame record indicating a special unwind. + * The record::{fp,lr} fields must be zero to indicate the presence of + * metadata. + */ +struct frame_record_meta { + struct frame_record record; + u64 type; +}; +#endif /* __ASSEMBLY */ + #endif /* __ASM_STACKTRACE_FRAME_H */ |