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#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	if (((unsigned long) fpu) & 7)
 41		return -EFAULT;
 42
 43	err = get_user(fprs, &fpu->si_fprs);
 44	fprs_write(0);
 45	regs->tstate &= ~TSTATE_PEF;
 46	if (fprs & FPRS_DL)
 47		err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
 48		       	       (sizeof(unsigned int) * 32));
 49	if (fprs & FPRS_DU)
 50		err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
 51		       	       (sizeof(unsigned int) * 32));
 52	err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
 53	err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
 54	current_thread_info()->fpsaved[0] |= fprs;
 55	return err;
 56}
 57
 58int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
 59{
 60	int i, err = __put_user(wsaved, &rwin->wsaved);
 61
 62	for (i = 0; i < wsaved; i++) {
 63		struct reg_window *rp = &current_thread_info()->reg_window[i];
 64		unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
 65
 66		err |= copy_to_user(&rwin->reg_window[i], rp,
 67				    sizeof(struct reg_window));
 68		err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
 69	}
 70	return err;
 71}
 72
 73int restore_rwin_state(__siginfo_rwin_t __user *rp)
 74{
 75	struct thread_info *t = current_thread_info();
 76	int i, wsaved, err;
 77
 78	if (((unsigned long) rp) & 7)
 79		return -EFAULT;
 80
 81	get_user(wsaved, &rp->wsaved);
 82	if (wsaved > NSWINS)
 83		return -EFAULT;
 84
 85	err = 0;
 86	for (i = 0; i < wsaved; i++) {
 87		err |= copy_from_user(&t->reg_window[i],
 88				      &rp->reg_window[i],
 89				      sizeof(struct reg_window));
 90		err |= __get_user(t->rwbuf_stkptrs[i],
 91				  &rp->rwbuf_stkptrs[i]);
 92	}
 93	if (err)
 94		return err;
 95
 96	set_thread_wsaved(wsaved);
 97	synchronize_user_stack();
 98	if (get_thread_wsaved())
 99		return -EFAULT;
100	return 0;
101}