1 // SPDX-License-Identifier: GPL-2.0-or-later
2 
3 #include <linux/regset.h>
4 
5 #include <asm/switch_to.h>
6 
7 #include "ptrace-decl.h"
8 
9 int ptrace_get_fpr(struct task_struct *child, int index, unsigned long *data)
10 {
11 #ifdef CONFIG_PPC_FPU_REGS
12 	unsigned int fpidx = index - PT_FPR0;
13 #endif
14 
15 	if (index > PT_FPSCR)
16 		return -EIO;
17 
18 #ifdef CONFIG_PPC_FPU_REGS
19 	flush_fp_to_thread(child);
20 	if (fpidx < (PT_FPSCR - PT_FPR0))
21 		memcpy(data, &child->thread.TS_FPR(fpidx), sizeof(long));
22 	else
23 		*data = child->thread.fp_state.fpscr;
24 #else
25 	*data = 0;
26 #endif
27 
28 	return 0;
29 }
30 
31 int ptrace_put_fpr(struct task_struct *child, int index, unsigned long data)
32 {
33 #ifdef CONFIG_PPC_FPU_REGS
34 	unsigned int fpidx = index - PT_FPR0;
35 #endif
36 
37 	if (index > PT_FPSCR)
38 		return -EIO;
39 
40 #ifdef CONFIG_PPC_FPU_REGS
41 	flush_fp_to_thread(child);
42 	if (fpidx < (PT_FPSCR - PT_FPR0))
43 		memcpy(&child->thread.TS_FPR(fpidx), &data, sizeof(long));
44 	else
45 		child->thread.fp_state.fpscr = data;
46 #endif
47 
48 	return 0;
49 }
50 
51