103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/thread_info.h>
|
||
|
|
#include <linux/uaccess.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
|
||
|
|
#include <asm/sigcontext.h>
|
||
|
|
#include <asm/fpumacro.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
#include <asm/switch_to.h>
|
||
|
|
|
||
|
|
#include "sigutil.h"
|
||
|
|
|
||
|
|
int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
|
||
|
|
{
|
||
|
|
unsigned long *fpregs = current_thread_info()->fpregs;
|
||
|
|
unsigned long fprs;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
fprs = current_thread_info()->fpsaved[0];
|
||
|
|
if (fprs & FPRS_DL)
|
||
|
|
err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
|
||
|
|
(sizeof(unsigned int) * 32));
|
||
|
|
if (fprs & FPRS_DU)
|
||
|
|
err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
|
||
|
|
(sizeof(unsigned int) * 32));
|
||
|
|
err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
|
||
|
|
err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
|
||
|
|
err |= __put_user(fprs, &fpu->si_fprs);
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
|
||
|
|
{
|
||
|
|
unsigned long *fpregs = current_thread_info()->fpregs;
|
||
|
|
unsigned long fprs;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (((unsigned long) fpu) & 7)
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
err = get_user(fprs, &fpu->si_fprs);
|
||
|
|
fprs_write(0);
|
||
|
|
regs->tstate &= ~TSTATE_PEF;
|
||
|
|
if (fprs & FPRS_DL)
|
||
|
|
err |= copy_from_user(fpregs, &fpu->si_float_regs[0],
|
||
|
|
(sizeof(unsigned int) * 32));
|
||
|
|
if (fprs & FPRS_DU)
|
||
|
|
err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32],
|
||
|
|
(sizeof(unsigned int) * 32));
|
||
|
|
err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
|
||
|
|
err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
|
||
|
|
current_thread_info()->fpsaved[0] |= fprs;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin)
|
||
|
|
{
|
||
|
|
int i, err = __put_user(wsaved, &rwin->wsaved);
|
||
|
|
|
||
|
|
for (i = 0; i < wsaved; i++) {
|
||
|
|
struct reg_window *rp = ¤t_thread_info()->reg_window[i];
|
||
|
|
unsigned long fp = current_thread_info()->rwbuf_stkptrs[i];
|
||
|
|
|
||
|
|
err |= copy_to_user(&rwin->reg_window[i], rp,
|
||
|
|
sizeof(struct reg_window));
|
||
|
|
err |= __put_user(fp, &rwin->rwbuf_stkptrs[i]);
|
||
|
|
}
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
int restore_rwin_state(__siginfo_rwin_t __user *rp)
|
||
|
|
{
|
||
|
|
struct thread_info *t = current_thread_info();
|
||
|
|
int i, wsaved, err;
|
||
|
|
|
||
|
|
if (((unsigned long) rp) & 7)
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
get_user(wsaved, &rp->wsaved);
|
||
|
|
if (wsaved > NSWINS)
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
err = 0;
|
||
|
|
for (i = 0; i < wsaved; i++) {
|
||
|
|
err |= copy_from_user(&t->reg_window[i],
|
||
|
|
&rp->reg_window[i],
|
||
|
|
sizeof(struct reg_window));
|
||
|
|
err |= __get_user(t->rwbuf_stkptrs[i],
|
||
|
|
&rp->rwbuf_stkptrs[i]);
|
||
|
|
}
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
set_thread_wsaved(wsaved);
|
||
|
|
synchronize_user_stack();
|
||
|
|
if (get_thread_wsaved())
|
||
|
|
return -EFAULT;
|
||
|
|
return 0;
|
||
|
|
}
|