[linux-block.git] / include / linux / objtool_types.h

/* 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;
	u8		end;
};

#endif /* __ASSEMBLY__ */

/*
 * 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_FUNC: Generate the unwind metadata of a callable function.
 * Useful for code which doesn't have an ELF function annotation.
 *
 * UNWIND_HINT_ENTRY: machine entry without stack, SYSCALL/SYSENTER etc.
 */
#define UNWIND_HINT_TYPE_CALL		0
#define UNWIND_HINT_TYPE_REGS		1
#define UNWIND_HINT_TYPE_REGS_PARTIAL	2
#define UNWIND_HINT_TYPE_FUNC		3
#define UNWIND_HINT_TYPE_ENTRY		4
#define UNWIND_HINT_TYPE_SAVE		5
#define UNWIND_HINT_TYPE_RESTORE	6

#endif /* _LINUX_OBJTOOL_TYPES_H */
Commit	Line	Data
f7515d9f JP	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_OBJTOOL_TYPES_H
	3	#define _LINUX_OBJTOOL_TYPES_H
	4
	5	#ifndef __ASSEMBLY__
	6
	7	#include <linux/types.h>
	8
	9	/*
	10	* This struct is used by asm and inline asm code to manually annotate the
	11	* location of registers on the stack.
	12	*/
	13	struct unwind_hint {
	14	u32 ip;
	15	s16 sp_offset;
	16	u8 sp_reg;
	17	u8 type;
	18	u8 signal;
	19	u8 end;
	20	};
	21
	22	#endif /* __ASSEMBLY__ */
	23
	24	/*
	25	* UNWIND_HINT_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP
	26	* (the caller's SP right before it made the call). Used for all callable
	27	* functions, i.e. all C code and all callable asm functions.
	28	*
	29	* UNWIND_HINT_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset
	30	* points to a fully populated pt_regs from a syscall, interrupt, or exception.
	31	*
	32	* UNWIND_HINT_TYPE_REGS_PARTIAL: Used in entry code to indicate that
	33	* sp_reg+sp_offset points to the iret return frame.
	34	*
	35	* UNWIND_HINT_FUNC: Generate the unwind metadata of a callable function.
	36	* Useful for code which doesn't have an ELF function annotation.
	37	*
	38	* UNWIND_HINT_ENTRY: machine entry without stack, SYSCALL/SYSENTER etc.
	39	*/
	40	#define UNWIND_HINT_TYPE_CALL 0
	41	#define UNWIND_HINT_TYPE_REGS 1
	42	#define UNWIND_HINT_TYPE_REGS_PARTIAL 2
	43	#define UNWIND_HINT_TYPE_FUNC 3
	44	#define UNWIND_HINT_TYPE_ENTRY 4
	45	#define UNWIND_HINT_TYPE_SAVE 5
	46	#define UNWIND_HINT_TYPE_RESTORE 6
	47
	48	#endif /* _LINUX_OBJTOOL_TYPES_H */