1// SPDX-License-Identifier: GPL-2.0
  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
 15int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
 16{
 17	unsigned long *fpregs = current_thread_info()->fpregs;
 18	unsigned long fprs;
 19	int err = 0;
 20	
 21	fprs = current_thread_info()->fpsaved[0];
 22	if (fprs & FPRS_DL)
 23		err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
 24				    (sizeof(unsigned int) * 32));
 25	if (fprs & FPRS_DU)
 26		err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
 27				    (sizeof(unsigned int) * 32));
 28	err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
 29	err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
 30	err |= __put_user(fprs, &fpu->si_fprs);
 31
 32	return err;
 33}
 34
 35int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
 36{
 37	unsigned long *fpregs = current_thread_info()->fpregs;
 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, &fpu->si_float_regs[0],
 49		       	       (sizeof(unsigned int) * 32));
 50	if (fprs & FPRS_DU)
 51		err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
 52		       	       (sizeof(unsigned int) * 32));
 53	err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
 54	err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
 55	current_thread_info()->fpsaved[0] |= fprs;
 56	return err;
 57}
 58
 59int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
 60{
 61	int i, err = __put_user(wsaved, &rwin->wsaved);
 62
 63	for (i = 0; i < wsaved; i++) {
 64		struct reg_window *rp = &current_thread_info()->reg_window[i];
 65		unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
 66
 67		err |= copy_to_user(&rwin->reg_window[i], rp,
 68				    sizeof(struct reg_window));
 69		err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
 70	}
 71	return err;
 72}
 73
 74int restore_rwin_state(__siginfo_rwin_t __user *rp)
 75{
 76	struct thread_info *t = current_thread_info();
 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_window[i],
 89				      &rp->reg_window[i],
 90				      sizeof(struct reg_window));
 91		err |= __get_user(t->rwbuf_stkptrs[i],
 92				  &rp->rwbuf_stkptrs[i]);
 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}

 
 1#include <linux/kernel.h>
 2#include <linux/types.h>
 3#include <linux/thread_info.h>
 4#include <linux/uaccess.h>
 
 5
 6#include <asm/sigcontext.h>
 7#include <asm/fpumacro.h>
 8#include <asm/ptrace.h>
 
 9
10#include "sigutil.h"
11
12int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
13{
14	unsigned long *fpregs = current_thread_info()->fpregs;
15	unsigned long fprs;
16	int err = 0;
17	
18	fprs = current_thread_info()->fpsaved[0];
19	if (fprs & FPRS_DL)
20		err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
21				    (sizeof(unsigned int) * 32));
22	if (fprs & FPRS_DU)
23		err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
24				    (sizeof(unsigned int) * 32));
25	err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
26	err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
27	err |= __put_user(fprs, &fpu->si_fprs);
28
29	return err;
30}
31
32int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
33{
34	unsigned long *fpregs = current_thread_info()->fpregs;
35	unsigned long fprs;
36	int err;
37
38	err = __get_user(fprs, &fpu->si_fprs);
 
 
 
39	fprs_write(0);
40	regs->tstate &= ~TSTATE_PEF;
41	if (fprs & FPRS_DL)
42		err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
43		       	       (sizeof(unsigned int) * 32));
44	if (fprs & FPRS_DU)
45		err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
46		       	       (sizeof(unsigned int) * 32));
47	err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
48	err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
49	current_thread_info()->fpsaved[0] |= fprs;
50	return err;
51}
52
53int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
54{
55	int i, err = __put_user(wsaved, &rwin->wsaved);
56
57	for (i = 0; i < wsaved; i++) {
58		struct reg_window *rp = &current_thread_info()->reg_window[i];
59		unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
60
61		err |= copy_to_user(&rwin->reg_window[i], rp,
62				    sizeof(struct reg_window));
63		err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
64	}
65	return err;
66}
67
68int restore_rwin_state(__siginfo_rwin_t __user *rp)
69{
70	struct thread_info *t = current_thread_info();
71	int i, wsaved, err;
72
73	__get_user(wsaved, &rp->wsaved);
 
 
 
74	if (wsaved > NSWINS)
75		return -EFAULT;
76
77	err = 0;
78	for (i = 0; i < wsaved; i++) {
79		err |= copy_from_user(&t->reg_window[i],
80				      &rp->reg_window[i],
81				      sizeof(struct reg_window));
82		err |= __get_user(t->rwbuf_stkptrs[i],
83				  &rp->rwbuf_stkptrs[i]);
84	}
85	if (err)
86		return err;
87
88	set_thread_wsaved(wsaved);
89	synchronize_user_stack();
90	if (get_thread_wsaved())
91		return -EFAULT;
92	return 0;
93}