Commit 2983573e authored by Linus Torvalds's avatar Linus Torvalds
parents 2da2c664 5598473a
......@@ -45,6 +45,19 @@ typedef struct {
int si_mask;
} __siginfo32_t;
#define __SIGC_MAXWIN 7
typedef struct {
unsigned long locals[8];
unsigned long ins[8];
} __siginfo_reg_window;
typedef struct {
int wsaved;
__siginfo_reg_window reg_window[__SIGC_MAXWIN];
unsigned long rwbuf_stkptrs[__SIGC_MAXWIN];
} __siginfo_rwin_t;
#ifdef CONFIG_SPARC64
typedef struct {
unsigned int si_float_regs [64];
......@@ -73,6 +86,7 @@ struct sigcontext {
unsigned long ss_size;
} sigc_stack;
unsigned long sigc_mask;
__siginfo_rwin_t * sigc_rwin_save;
};
#else
......
......@@ -32,6 +32,7 @@ obj-$(CONFIG_SPARC32) += sun4m_irq.o sun4c_irq.o sun4d_irq.o
obj-y += process_$(BITS).o
obj-y += signal_$(BITS).o
obj-y += sigutil_$(BITS).o
obj-$(CONFIG_SPARC32) += ioport.o
obj-y += setup_$(BITS).o
obj-y += idprom.o
......
This diff is collapsed.
......@@ -26,6 +26,8 @@
#include <asm/pgtable.h>
#include <asm/cacheflush.h> /* flush_sig_insns */
#include "sigutil.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
......@@ -39,8 +41,8 @@ struct signal_frame {
unsigned long insns[2] __attribute__ ((aligned (8)));
unsigned int extramask[_NSIG_WORDS - 1];
unsigned int extra_size; /* Should be 0 */
__siginfo_fpu_t fpu_state;
};
__siginfo_rwin_t __user *rwin_save;
} __attribute__((aligned(8)));
struct rt_signal_frame {
struct sparc_stackf ss;
......@@ -51,8 +53,8 @@ struct rt_signal_frame {
unsigned int insns[2];
stack_t stack;
unsigned int extra_size; /* Should be 0 */
__siginfo_fpu_t fpu_state;
};
__siginfo_rwin_t __user *rwin_save;
} __attribute__((aligned(8)));
/* Align macros */
#define SF_ALIGNEDSZ (((sizeof(struct signal_frame) + 7) & (~7)))
......@@ -79,43 +81,13 @@ asmlinkage int sys_sigsuspend(old_sigset_t set)
return _sigpause_common(set);
}
static inline 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(&current->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(&current->thread.fpqueue[0],
&fpu->si_fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
return err;
}
asmlinkage void do_sigreturn(struct pt_regs *regs)
{
struct signal_frame __user *sf;
unsigned long up_psr, pc, npc;
sigset_t set;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
int err;
/* Always make any pending restarted system calls return -EINTR */
......@@ -150,9 +122,11 @@ asmlinkage void do_sigreturn(struct pt_regs *regs)
pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __get_user(rwin_save, &sf->rwin_save);
if (rwin_save)
err |= restore_rwin_state(rwin_save);
/* This is pretty much atomic, no amount locking would prevent
* the races which exist anyways.
......@@ -180,6 +154,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
struct rt_signal_frame __user *sf;
unsigned int psr, pc, npc;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
......@@ -207,8 +182,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
pt_regs_clear_syscall(regs);
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
if (!err && fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
......@@ -228,6 +202,12 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
set_fs(old_fs);
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
......@@ -280,53 +260,23 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
return (void __user *) sp;
}
static inline 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(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->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(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
last_task_used_math = NULL;
regs->psr &= ~(PSR_EF);
}
#endif
err |= __copy_to_user(&fpu->si_float_regs[0],
&current->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],
&current->thread.fpqueue[0],
((sizeof(unsigned long) +
(sizeof(unsigned long *)))*16));
clear_used_math();
return err;
}
static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset)
{
struct signal_frame __user *sf;
int sigframe_size, err;
int sigframe_size, err, wsaved;
void __user *tail;
/* 1. Make sure everything is clean */
synchronize_user_stack();
sigframe_size = SF_ALIGNEDSZ;
if (!used_math())
sigframe_size -= sizeof(__siginfo_fpu_t);
wsaved = current_thread_info()->w_saved;
sigframe_size = sizeof(*sf);
if (used_math())
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct signal_frame __user *)
get_sigframe(&ka->sa, regs, sigframe_size);
......@@ -334,8 +284,7 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
if (invalid_frame_pointer(sf, sigframe_size))
goto sigill_and_return;
if (current_thread_info()->w_saved != 0)
goto sigill_and_return;
tail = sf + 1;
/* 2. Save the current process state */
err = __copy_to_user(&sf->info.si_regs, regs, sizeof(struct pt_regs));
......@@ -343,17 +292,34 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(0, &sf->extra_size);
if (used_math()) {
err |= save_fpu_state(regs, &sf->fpu_state);
err |= __put_user(&sf->fpu_state, &sf->fpu_save);
__siginfo_fpu_t __user *fp = tail;
tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user(fp, &sf->fpu_save);
} else {
err |= __put_user(0, &sf->fpu_save);
}
if (wsaved) {
__siginfo_rwin_t __user *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user(rwp, &sf->rwin_save);
} else {
err |= __put_user(0, &sf->rwin_save);
}
err |= __put_user(oldset->sig[0], &sf->info.si_mask);
err |= __copy_to_user(sf->extramask, &oldset->sig[1],
(_NSIG_WORDS - 1) * sizeof(unsigned int));
if (!wsaved) {
err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
sizeof(struct reg_window32));
} else {
struct reg_window32 *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
if (err)
goto sigsegv;
......@@ -399,21 +365,24 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info)
{
struct rt_signal_frame __user *sf;
int sigframe_size;
int sigframe_size, wsaved;
void __user *tail;
unsigned int psr;
int err;
synchronize_user_stack();
sigframe_size = RT_ALIGNEDSZ;
if (!used_math())
sigframe_size -= sizeof(__siginfo_fpu_t);
wsaved = current_thread_info()->w_saved;
sigframe_size = sizeof(*sf);
if (used_math())
sigframe_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sigframe_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *)
get_sigframe(&ka->sa, regs, sigframe_size);
if (invalid_frame_pointer(sf, sigframe_size))
goto sigill;
if (current_thread_info()->w_saved != 0)
goto sigill;
tail = sf + 1;
err = __put_user(regs->pc, &sf->regs.pc);
err |= __put_user(regs->npc, &sf->regs.npc);
err |= __put_user(regs->y, &sf->regs.y);
......@@ -425,11 +394,21 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(0, &sf->extra_size);
if (psr & PSR_EF) {
err |= save_fpu_state(regs, &sf->fpu_state);
err |= __put_user(&sf->fpu_state, &sf->fpu_save);
__siginfo_fpu_t *fp = tail;
tail += sizeof(*fp);
err |= save_fpu_state(regs, fp);
err |= __put_user(fp, &sf->fpu_save);
} else {
err |= __put_user(0, &sf->fpu_save);
}
if (wsaved) {
__siginfo_rwin_t *rwp = tail;
tail += sizeof(*rwp);
err |= save_rwin_state(wsaved, rwp);
err |= __put_user(rwp, &sf->rwin_save);
} else {
err |= __put_user(0, &sf->rwin_save);
}
err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t));
/* Setup sigaltstack */
......@@ -437,8 +416,15 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
if (!wsaved) {
err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
sizeof(struct reg_window32));
} else {
struct reg_window32 *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
}
err |= copy_siginfo_to_user(&sf->info, info);
......
......@@ -34,6 +34,7 @@
#include "entry.h"
#include "systbls.h"
#include "sigutil.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
......@@ -236,7 +237,7 @@ struct rt_signal_frame {
__siginfo_fpu_t __user *fpu_save;
stack_t stack;
sigset_t mask;
__siginfo_fpu_t fpu_state;
__siginfo_rwin_t *rwin_save;
};
static long _sigpause_common(old_sigset_t set)
......@@ -266,33 +267,12 @@ asmlinkage long sys_sigsuspend(old_sigset_t set)
return _sigpause_common(set);
}
static inline 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;
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;
}
void do_rt_sigreturn(struct pt_regs *regs)
{
struct rt_signal_frame __user *sf;
unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t __user *fpu_save;
__siginfo_rwin_t __user *rwin_save;
sigset_t set;
int err;
......@@ -325,8 +305,8 @@ void do_rt_sigreturn(struct pt_regs *regs)
regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC));
err |= __get_user(fpu_save, &sf->fpu_save);
if (fpu_save)
err |= restore_fpu_state(regs, &sf->fpu_state);
if (!err && fpu_save)
err |= restore_fpu_state(regs, fpu_save);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
err |= do_sigaltstack(&sf->stack, NULL, (unsigned long)sf);
......@@ -334,6 +314,12 @@ void do_rt_sigreturn(struct pt_regs *regs)
if (err)
goto segv;
err |= __get_user(rwin_save, &sf->rwin_save);
if (!err && rwin_save) {
if (restore_rwin_state(rwin_save))
goto segv;
}
regs->tpc = tpc;
regs->tnpc = tnpc;
......@@ -351,34 +337,13 @@ void do_rt_sigreturn(struct pt_regs *regs)
}
/* Checks if the fp is valid */
static int invalid_frame_pointer(void __user *fp, int fplen)
static int invalid_frame_pointer(void __user *fp)
{
if (((unsigned long) fp) & 15)
return 1;
return 0;
}
static inline 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;
}
static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
......@@ -414,34 +379,48 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
int signo, sigset_t *oldset, siginfo_t *info)
{
struct rt_signal_frame __user *sf;
int sigframe_size, err;
int wsaved, err, sf_size;
void __user *tail;
/* 1. Make sure everything is clean */
synchronize_user_stack();
save_and_clear_fpu();
sigframe_size = sizeof(struct rt_signal_frame);
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
sigframe_size -= sizeof(__siginfo_fpu_t);
wsaved = get_thread_wsaved();
sf_size = sizeof(struct rt_signal_frame);
if (current_thread_info()->fpsaved[0] & FPRS_FEF)
sf_size += sizeof(__siginfo_fpu_t);
if (wsaved)
sf_size += sizeof(__siginfo_rwin_t);
sf = (struct rt_signal_frame __user *)
get_sigframe(ka, regs, sigframe_size);
get_sigframe(ka, regs, sf_size);
if (invalid_frame_pointer (sf, sigframe_size))
if (invalid_frame_pointer (sf))
goto sigill;
if (get_thread_wsaved() != 0)
goto sigill;
tail = (sf + 1);
/* 2. Save the current process state */
err = copy_to_user(&sf->regs, regs, sizeof (*regs));
if (current_thread_info()->fpsaved[0] & FPRS_FEF) {
err |= save_fpu_state(regs, &sf->fpu_state);
err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
__siginfo_fpu_t __user *fpu_save = tail;
tail += sizeof(__siginfo_fpu_t);
err |= save_fpu_state(regs, fpu_save);
err |= __put_user((u64)fpu_save, &sf->fpu_save);
} else {
err |= __put_user(0, &sf->fpu_save);
}
if (wsaved) {
__siginfo_rwin_t __user *rwin_save = tail;
tail += sizeof(__siginfo_rwin_t);
err |= save_rwin_state(wsaved, rwin_save);
err |= __put_user((u64)rwin_save, &sf->rwin_save);
set_thread_wsaved(0);
} else {
err |= __put_user(0, &sf->rwin_save);
}
/* Setup sigaltstack */
err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
......@@ -450,10 +429,17 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
if (!wsaved) {
err |= copy_in_user((u64 __user *)sf,
(u64 __user *)(regs->u_regs[UREG_FP]+STACK_BIAS),
(u64 __user *)(regs->u_regs[UREG_FP] +
STACK_BIAS),
sizeof(struct reg_window));
} else {
struct reg_window *rp;
rp = &current_thread_info()->reg_window[wsaved - 1];
err |= copy_to_user(sf, rp, sizeof(struct reg_window));
}
if (info)
err |= copy_siginfo_to_user(&sf->info, info);
else {
......
#ifndef _SIGUTIL_H
#define _SIGUTIL_H
int save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu);
int restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu);
int save_rwin_state(int wsaved, __siginfo_rwin_t __user *rwin);
int restore_rwin_state(__siginfo_rwin_t __user *rp);
#endif /* _SIGUTIL_H */
#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 "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(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->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(&current->thread.float_regs[0], &current->thread.fsr,
&current->thread.fpqueue[0], &current->thread.fpqdepth);
last_task_used_math = NULL;
regs->psr &= ~(PSR_EF);
}
#endif
err |= __copy_to_user(&fpu->si_float_regs[0],
&current->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],
&current->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(&current->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(&current->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 = &current_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;
}
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/thread_info.h>
#include <linux/uaccess.h>
#include <asm/sigcontext.h>
#include <asm/fpumacro.h>
#include <asm/ptrace.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;
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 = &current_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;
__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;
}
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