/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __ASM_STACKTRACE_FRAME_H
#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 {
u64 fp;
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 */
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