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

 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}