mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 10:31:54 +00:00
d550bbd40c
Disintegrate asm/system.h for Sparc. Signed-off-by: David Howells <dhowells@redhat.com> cc: sparclinux@vger.kernel.org
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/thread_info.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/sched.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)
|
|
{
|
|
int err = 0;
|
|
#ifdef CONFIG_SMP
|
|
if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
|
|
put_psr(get_psr() | PSR_EF);
|
|
fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
|
|
¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
|
|
regs->psr &= ~(PSR_EF);
|
|
clear_tsk_thread_flag(current, TIF_USEDFPU);
|
|
}
|
|
#else
|
|
if (current == last_task_used_math) {
|
|
put_psr(get_psr() | PSR_EF);
|
|
fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
|
|
¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
|
|
last_task_used_math = NULL;
|
|
regs->psr &= ~(PSR_EF);
|
|
}
|
|
#endif
|
|
err |= __copy_to_user(&fpu->si_float_regs[0],
|
|
¤t->thread.float_regs[0],
|
|
(sizeof(unsigned long) * 32));
|
|
err |= __put_user(current->thread.fsr, &fpu->si_fsr);
|
|
err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
|
if (current->thread.fpqdepth != 0)
|
|
err |= __copy_to_user(&fpu->si_fpqueue[0],
|
|
¤t->thread.fpqueue[0],
|
|
((sizeof(unsigned long) +
|
|
(sizeof(unsigned long *)))*16));
|
|
clear_used_math();
|
|
return err;
|
|
}
|
|
|
|
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
|
|
{
|
|
int err;
|
|
#ifdef CONFIG_SMP
|
|
if (test_tsk_thread_flag(current, TIF_USEDFPU))
|
|
regs->psr &= ~PSR_EF;
|
|
#else
|
|
if (current == last_task_used_math) {
|
|
last_task_used_math = NULL;
|
|
regs->psr &= ~PSR_EF;
|
|
}
|
|
#endif
|
|
set_used_math();
|
|
clear_tsk_thread_flag(current, TIF_USEDFPU);
|
|
|
|
if (!access_ok(VERIFY_READ, fpu, sizeof(*fpu)))
|
|
return -EFAULT;
|
|
|
|
err = __copy_from_user(¤t->thread.float_regs[0], &fpu->si_float_regs[0],
|
|
(sizeof(unsigned long) * 32));
|
|
err |= __get_user(current->thread.fsr, &fpu->si_fsr);
|
|
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
|
if (current->thread.fpqdepth != 0)
|
|
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
|
&fpu->si_fpqueue[0],
|
|
((sizeof(unsigned long) +
|
|
(sizeof(unsigned long *)))*16));
|
|
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_window32 *rp;
|
|
unsigned long fp;
|
|
|
|
rp = ¤t_thread_info()->reg_window[i];
|
|
fp = current_thread_info()->rwbuf_stkptrs[i];
|
|
err |= copy_to_user(&rwin->reg_window[i], rp,
|
|
sizeof(struct reg_window32));
|
|
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;
|
|
|
|
__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_window32));
|
|
err |= __get_user(t->rwbuf_stkptrs[i],
|
|
&rp->rwbuf_stkptrs[i]);
|
|
}
|
|
if (err)
|
|
return err;
|
|
|
|
t->w_saved = wsaved;
|
|
synchronize_user_stack();
|
|
if (t->w_saved)
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
}
|