1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ptrace.h>
3 
4 /**
5  * regs_query_register_offset() - query register offset from its name
6  * @name:	the name of a register
7  *
8  * regs_query_register_offset() returns the offset of a register in struct
9  * pt_regs from its name. If the name is invalid, this returns -EINVAL;
10  */
regs_query_register_offset(const char * name)11 int regs_query_register_offset(const char *name)
12 {
13 	const struct pt_regs_offset *roff;
14 	for (roff = regoffset_table; roff->name != NULL; roff++)
15 		if (!strcmp(roff->name, name))
16 			return roff->offset;
17 	return -EINVAL;
18 }
19 
20 /**
21  * regs_query_register_name() - query register name from its offset
22  * @offset:	the offset of a register in struct pt_regs.
23  *
24  * regs_query_register_name() returns the name of a register from its
25  * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
26  */
regs_query_register_name(unsigned int offset)27 const char *regs_query_register_name(unsigned int offset)
28 {
29 	const struct pt_regs_offset *roff;
30 	for (roff = regoffset_table; roff->name != NULL; roff++)
31 		if (roff->offset == offset)
32 			return roff->name;
33 	return NULL;
34 }
35