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 if (IS_ENABLED(CONFIG_PPC32))
22 // On 32-bit the index we are passed refers to 32-bit words
23 *data = ((u32 *)child->thread.fp_state.fpr)[fpidx];
24 else
25 memcpy(data, &child->thread.TS_FPR(fpidx), sizeof(long));
26 } else
27 *data = child->thread.fp_state.fpscr;
28 #else
29 *data = 0;
30 #endif
31
32 return 0;
33 }
34
35 int ptrace_put_fpr(struct task_struct *child, int index, unsigned long data)
36 {
37 #ifdef CONFIG_PPC_FPU_REGS
38 unsigned int fpidx = index - PT_FPR0;
39 #endif
40
41 if (index > PT_FPSCR)
42 return -EIO;
43
44 #ifdef CONFIG_PPC_FPU_REGS
45 flush_fp_to_thread(child);
46 if (fpidx < (PT_FPSCR - PT_FPR0)) {
47 if (IS_ENABLED(CONFIG_PPC32))
48 // On 32-bit the index we are passed refers to 32-bit words
49 ((u32 *)child->thread.fp_state.fpr)[fpidx] = data;
50 else
51 memcpy(&child->thread.TS_FPR(fpidx), &data, sizeof(long));
52 } else
53 child->thread.fp_state.fpscr = data;
54 #endif
55
56 return 0;
57 }
58
59
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