1 // SPDX-License-Identifier: GPL-2.0 1
2 #include <linux/kernel.h>
3 #include <linux/types.h>
4 #include <linux/thread_info.h>
5 #include <linux/uaccess.h>
6 #include <linux/errno.h>
7
8 #include <asm/sigcontext.h>
9 #include <asm/fpumacro.h>
10 #include <asm/ptrace.h>
11 #include <asm/switch_to.h>
12
13 #include "sigutil.h"
14
15 int save_fpu_state(struct pt_regs *regs, __sig
16 {
17 unsigned long *fpregs = current_thread
18 unsigned long fprs;
19 int err = 0;
20
21 fprs = current_thread_info()->fpsaved[
22 if (fprs & FPRS_DL)
23 err |= copy_to_user(&fpu->si_f
24 (sizeof(un
25 if (fprs & FPRS_DU)
26 err |= copy_to_user(&fpu->si_f
27 (sizeof(un
28 err |= __put_user(current_thread_info(
29 err |= __put_user(current_thread_info(
30 err |= __put_user(fprs, &fpu->si_fprs)
31
32 return err;
33 }
34
35 int restore_fpu_state(struct pt_regs *regs, __
36 {
37 unsigned long *fpregs = current_thread
38 unsigned long fprs;
39 int err;
40
41 if (((unsigned long) fpu) & 7)
42 return -EFAULT;
43
44 err = get_user(fprs, &fpu->si_fprs);
45 fprs_write(0);
46 regs->tstate &= ~TSTATE_PEF;
47 if (fprs & FPRS_DL)
48 err |= copy_from_user(fpregs,
49 (sizeof(unsigne
50 if (fprs & FPRS_DU)
51 err |= copy_from_user(fpregs+1
52 (sizeof(unsigne
53 err |= __get_user(current_thread_info(
54 err |= __get_user(current_thread_info(
55 current_thread_info()->fpsaved[0] |= f
56 return err;
57 }
58
59 int save_rwin_state(int wsaved, __siginfo_rwin
60 {
61 int i, err = __put_user(wsaved, &rwin-
62
63 for (i = 0; i < wsaved; i++) {
64 struct reg_window *rp = &curre
65 unsigned long fp = current_thr
66
67 err |= copy_to_user(&rwin->reg
68 sizeof(str
69 err |= __put_user(fp, &rwin->r
70 }
71 return err;
72 }
73
74 int restore_rwin_state(__siginfo_rwin_t __user
75 {
76 struct thread_info *t = current_thread
77 int i, wsaved, err;
78
79 if (((unsigned long) rp) & 7)
80 return -EFAULT;
81
82 get_user(wsaved, &rp->wsaved);
83 if (wsaved > NSWINS)
84 return -EFAULT;
85
86 err = 0;
87 for (i = 0; i < wsaved; i++) {
88 err |= copy_from_user(&t->reg_
89 &rp->reg
90 sizeof(s
91 err |= __get_user(t->rwbuf_stk
92 &rp->rwbuf_s
93 }
94 if (err)
95 return err;
96
97 set_thread_wsaved(wsaved);
98 synchronize_user_stack();
99 if (get_thread_wsaved())
100 return -EFAULT;
101 return 0;
102 }
103
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