| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_OBJTOOL_TYPES_H |
| #define _LINUX_OBJTOOL_TYPES_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/types.h> |
| |
| /* |
| * This struct is used by asm and inline asm code to manually annotate the |
| * location of registers on the stack. |
| */ |
| struct unwind_hint { |
| u32 ip; |
| s16 sp_offset; |
| u8 sp_reg; |
| u8 type; |
| u8 signal; |
| }; |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| /* |
| * UNWIND_HINT_TYPE_UNDEFINED: A blind spot in ORC coverage which can result in |
| * a truncated and unreliable stack unwind. |
| * |
| * UNWIND_HINT_TYPE_END_OF_STACK: The end of the kernel stack unwind before |
| * hitting user entry, boot code, or fork entry (when there are no pt_regs |
| * available). |
| * |
| * UNWIND_HINT_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP |
| * (the caller's SP right before it made the call). Used for all callable |
| * functions, i.e. all C code and all callable asm functions. |
| * |
| * UNWIND_HINT_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset |
| * points to a fully populated pt_regs from a syscall, interrupt, or exception. |
| * |
| * UNWIND_HINT_TYPE_REGS_PARTIAL: Used in entry code to indicate that |
| * sp_reg+sp_offset points to the iret return frame. |
| * |
| * UNWIND_HINT_TYPE_FUNC: Generate the unwind metadata of a callable function. |
| * Useful for code which doesn't have an ELF function annotation. |
| * |
| * UNWIND_HINT_TYPE_{SAVE,RESTORE}: Save the unwind metadata at a certain |
| * location so that it can be restored later. |
| */ |
| #define UNWIND_HINT_TYPE_UNDEFINED 0 |
| #define UNWIND_HINT_TYPE_END_OF_STACK 1 |
| #define UNWIND_HINT_TYPE_CALL 2 |
| #define UNWIND_HINT_TYPE_REGS 3 |
| #define UNWIND_HINT_TYPE_REGS_PARTIAL 4 |
| /* The below hint types don't have corresponding ORC types */ |
| #define UNWIND_HINT_TYPE_FUNC 5 |
| #define UNWIND_HINT_TYPE_SAVE 6 |
| #define UNWIND_HINT_TYPE_RESTORE 7 |
| |
| #endif /* _LINUX_OBJTOOL_TYPES_H */ |