/*
* OK, we're invoking a handler
*/
static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, struct pt_regs *regs)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = sig;
int ret;
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return;
}
signal_delivered(sig, info, ka, regs, 0);
}
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
{
int err = 0;
__get_user_error(regs->ARM_r0, &sc->arm_r0, err);
__get_user_error(regs->ARM_r1, &sc->arm_r1, err);
__get_user_error(regs->ARM_r2, &sc->arm_r2, err);
__get_user_error(regs->ARM_r3, &sc->arm_r3, err);
__get_user_error(regs->ARM_r4, &sc->arm_r4, err);
__get_user_error(regs->ARM_r5, &sc->arm_r5, err);
__get_user_error(regs->ARM_r6, &sc->arm_r6, err);
__get_user_error(regs->ARM_r7, &sc->arm_r7, err);
__get_user_error(regs->ARM_r8, &sc->arm_r8, err);
__get_user_error(regs->ARM_r9, &sc->arm_r9, err);
__get_user_error(regs->ARM_r10, &sc->arm_r10, err);
__get_user_error(regs->ARM_fp, &sc->arm_fp, err);
__get_user_error(regs->ARM_ip, &sc->arm_ip, err);
__get_user_error(regs->ARM_sp, &sc->arm_sp, err);
__get_user_error(regs->ARM_lr, &sc->arm_lr, err);
__get_user_error(regs->ARM_pc, &sc->arm_pc, err);
__get_user_error(regs->ARM_cpsr, &sc->arm_cpsr, err);
err |= !valid_user_regs(regs);
return err;
}
static int restore_sigframe(struct pt_regs *regs,
struct rt_sigframe __user *sf)
{
sigset_t set;
int i, err;
struct aux_context __user *aux =
(struct aux_context __user *)sf->uc.uc_mcontext.__reserved;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (err == 0)
set_current_blocked(&set);
for (i = 0; i < 31; i++)
__get_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
err);
__get_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
__get_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
__get_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
/*
* Avoid sys_rt_sigreturn() restarting.
*/
regs->syscallno = ~0UL;
err |= !valid_user_regs(®s->user_regs);
if (err == 0)
err |= restore_fpsimd_context(&aux->fpsimd);
return err;
}
static inline void
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *oldset, struct pt_regs *regs, int syscall)
{
int ret;
/*
* Set up the stack frame
*/
ret = setup_rt_frame(sig, ka, info, oldset, regs);
/*
* Check that the resulting registers are sane
*/
ret |= !valid_user_regs(regs);
/*
* Block the signal if we were unsuccessful.
*/
if (ret != 0 || !(ka->sa.sa_flags & SA_NODEFER)) {
spin_lock_irq(¤t->sighand->siglock);
sigorsets(¤t->blocked, ¤t->blocked,
&ka->sa.sa_mask);
sigaddset(¤t->blocked, sig);
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
}
if (ret == 0)
return;
force_sigsegv(sig, current);
}
static int compat_gpr_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_regs newregs;
int ret = 0;
unsigned int i, start, num_regs;
/* Calculate the number of AArch32 registers contained in count */
num_regs = count / regset->size;
/* Convert pos into an register number */
start = pos / regset->size;
if (start + num_regs > regset->n)
return -EIO;
newregs = *task_pt_regs(target);
for (i = 0; i < num_regs; ++i) {
unsigned int idx = start + i;
compat_ulong_t reg;
if (kbuf) {
memcpy(®, kbuf, sizeof(reg));
kbuf += sizeof(reg);
} else {
ret = copy_from_user(®, ubuf, sizeof(reg));
if (ret) {
ret = -EFAULT;
break;
}
ubuf += sizeof(reg);
}
switch (idx) {
case 15:
newregs.pc = reg;
break;
case 16:
newregs.pstate = reg;
break;
case 17:
newregs.orig_x0 = reg;
break;
default:
newregs.regs[idx] = reg;
}
}
if (valid_user_regs(&newregs.user_regs))
*task_pt_regs(target) = newregs;
else
ret = -EINVAL;
return ret;
}
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
{
int err = 0;
#define COPY(x) err |= __get_user(regs->x, &sc->x)
COPY(sr);
COPY(pc);
COPY(lr);
COPY(sp);
COPY(r12);
COPY(r11);
COPY(r10);
COPY(r9);
COPY(r8);
COPY(r7);
COPY(r6);
COPY(r5);
COPY(r4);
COPY(r3);
COPY(r2);
COPY(r1);
COPY(r0);
#undef COPY
/*
* Don't allow anyone to pretend they're running in supervisor
* mode or something...
*/
err |= !valid_user_regs(regs);
return err;
}
/*
* OK, we're invoking a handler
*/
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
/*
* Increment event counter and perform fixup for the pre-signal
* frame.
*/
rseq_signal_deliver(ksig, regs);
/*
* Set up the stack frame
*/
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(ksig, oldset, regs);
else
ret = setup_frame(ksig, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
signal_setup_done(ret, ksig, 0);
}
/*
* OK, we're invoking a handler
*/
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = ksig->sig;
int ret;
/*
* Set up the stack frame
*/
if (is_compat_task()) {
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = compat_setup_rt_frame(usig, ksig, oldset, regs);
else
ret = compat_setup_frame(usig, ksig, oldset, regs);
} else {
ret = setup_rt_frame(usig, ksig, oldset, regs);
}
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(®s->user_regs, current);
/*
* Fast forward the stepping logic so we step into the signal
* handler.
*/
if (!ret)
user_fastforward_single_step(tsk);
signal_setup_done(ret, ksig, 0);
}
static int
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs, int syscall)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
int usig = sig;
int ret;
if (syscall) {
switch (regs->ARM_r0) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
regs->ARM_r0 = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
regs->ARM_r0 = -EINTR;
break;
}
case -ERESTARTNOINTR:
setup_syscall_restart(regs);
}
}
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return ret;
}
spin_lock_irq(&tsk->sighand->siglock);
sigorsets(&tsk->blocked, &tsk->blocked,
&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&tsk->blocked, sig);
recalc_sigpending();
spin_unlock_irq(&tsk->sighand->siglock);
return 0;
}
/*
* OK, we're invoking a handler
*/
static void handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, struct pt_regs *regs, int syscall)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = sig;
int ret;
/*
* If we were from a system call, check for system call restarting...
*/
if (syscall) {
switch (regs->UCreg_00) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
regs->UCreg_00 = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
regs->UCreg_00 = -EINTR;
break;
}
/* fallthrough */
case -ERESTARTNOINTR:
setup_syscall_restart(regs);
}
}
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain
&& thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return;
}
signal_delivered(sig, info, ka, regs, 0);
}
static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe *frame;
unsigned long retcode;
int err = 0;
frame = get_sigframe(ka, regs, sizeof(struct rt_sigframe));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
goto segv_and_exit;
err |= __put_user(&frame->info, &frame->pinfo);
err |= __put_user(&frame->uc, &frame->puc);
err |= copy_siginfo_to_user(&frame->info, info);
/* Clear all the bits of the ucontext we don't use. */
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= setup_sigcontext(&frame->uc.uc_mcontext, /*&frame->fpstate,*/
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
retcode = (unsigned long)ka->sa.sa_restorer;
} else {
retcode = (unsigned long)&frame->retcode;
err |= __put_user(SWI_SYS_RT_SIGRETURN, &frame->retcode);
flush_icache_range(retcode, retcode + 4);
}
if (err)
goto segv_and_exit;
if (current->exec_domain && current->exec_domain->signal_invmap && sig < 32)
regs->ARM_r0 = current->exec_domain->signal_invmap[sig];
else
regs->ARM_r0 = sig;
regs->ARM_sp = (unsigned long)frame;
regs->ARM_lr = retcode;
regs->ARM_pc = (unsigned long)ka->sa.sa_handler;
#if defined(CONFIG_CPU_32)
/* Maybe we need to deliver a 32-bit signal to a 26-bit task. */
if (ka->sa.sa_flags & SA_THIRTYTWO)
regs->ARM_cpsr = USR_MODE;
#endif
if (valid_user_regs(regs))
return;
segv_and_exit:
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
}
static int compat_gpr_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_regs newregs;
int ret = 0;
unsigned int i, start, num_regs;
/* Calculate the number of AArch32 registers contained in count */
num_regs = count / regset->size;
/* Convert pos into an register number */
start = pos / regset->size;
if (start + num_regs > regset->n)
return -EIO;
newregs = *task_pt_regs(target);
for (i = 0; i < num_regs; ++i) {
unsigned int idx = start + i;
void *reg;
switch (idx) {
case 15:
reg = (void *)&newregs.pc;
break;
case 16:
reg = (void *)&newregs.pstate;
break;
case 17:
reg = (void *)&newregs.orig_x0;
break;
default:
reg = (void *)&newregs.regs[idx];
}
ret = copy_from_user(reg, ubuf, sizeof(compat_ulong_t));
if (ret)
goto out;
else
ubuf += sizeof(compat_ulong_t);
}
if (valid_user_regs(&newregs.user_regs))
*task_pt_regs(target) = newregs;
else
ret = -EINVAL;
out:
return ret;
}
static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
{
struct aux_sigframe __user *aux;
sigset_t set;
int err;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (err == 0) {
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(¤t->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
}
__get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
__get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
__get_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
__get_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
__get_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
__get_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
__get_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
__get_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
__get_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
__get_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
__get_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
__get_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
__get_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
__get_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
__get_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
__get_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
__get_user_error(regs->ARM_ORIG_r0, &sf->uc.uc_mcontext.arm_old_r0, err);
__get_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
err |= !valid_user_regs(regs);
aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
#ifdef CONFIG_CRUNCH
if (err == 0)
err |= restore_crunch_context(&aux->crunch);
#endif
#ifdef CONFIG_IWMMXT
if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
err |= restore_iwmmxt_context(&aux->iwmmxt);
#endif
#ifdef CONFIG_VFP
if (err == 0)
err |= restore_vfp_context(&aux->vfp);
#endif
return err;
}
static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
{
sigset_t set;
int err;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (err == 0) {
sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
}
err |= __get_user(regs->UCreg_00, &sf->uc.uc_mcontext.regs.UCreg_00);
err |= __get_user(regs->UCreg_01, &sf->uc.uc_mcontext.regs.UCreg_01);
err |= __get_user(regs->UCreg_02, &sf->uc.uc_mcontext.regs.UCreg_02);
err |= __get_user(regs->UCreg_03, &sf->uc.uc_mcontext.regs.UCreg_03);
err |= __get_user(regs->UCreg_04, &sf->uc.uc_mcontext.regs.UCreg_04);
err |= __get_user(regs->UCreg_05, &sf->uc.uc_mcontext.regs.UCreg_05);
err |= __get_user(regs->UCreg_06, &sf->uc.uc_mcontext.regs.UCreg_06);
err |= __get_user(regs->UCreg_07, &sf->uc.uc_mcontext.regs.UCreg_07);
err |= __get_user(regs->UCreg_08, &sf->uc.uc_mcontext.regs.UCreg_08);
err |= __get_user(regs->UCreg_09, &sf->uc.uc_mcontext.regs.UCreg_09);
err |= __get_user(regs->UCreg_10, &sf->uc.uc_mcontext.regs.UCreg_10);
err |= __get_user(regs->UCreg_11, &sf->uc.uc_mcontext.regs.UCreg_11);
err |= __get_user(regs->UCreg_12, &sf->uc.uc_mcontext.regs.UCreg_12);
err |= __get_user(regs->UCreg_13, &sf->uc.uc_mcontext.regs.UCreg_13);
err |= __get_user(regs->UCreg_14, &sf->uc.uc_mcontext.regs.UCreg_14);
err |= __get_user(regs->UCreg_15, &sf->uc.uc_mcontext.regs.UCreg_15);
err |= __get_user(regs->UCreg_16, &sf->uc.uc_mcontext.regs.UCreg_16);
err |= __get_user(regs->UCreg_17, &sf->uc.uc_mcontext.regs.UCreg_17);
err |= __get_user(regs->UCreg_18, &sf->uc.uc_mcontext.regs.UCreg_18);
err |= __get_user(regs->UCreg_19, &sf->uc.uc_mcontext.regs.UCreg_19);
err |= __get_user(regs->UCreg_20, &sf->uc.uc_mcontext.regs.UCreg_20);
err |= __get_user(regs->UCreg_21, &sf->uc.uc_mcontext.regs.UCreg_21);
err |= __get_user(regs->UCreg_22, &sf->uc.uc_mcontext.regs.UCreg_22);
err |= __get_user(regs->UCreg_23, &sf->uc.uc_mcontext.regs.UCreg_23);
err |= __get_user(regs->UCreg_24, &sf->uc.uc_mcontext.regs.UCreg_24);
err |= __get_user(regs->UCreg_25, &sf->uc.uc_mcontext.regs.UCreg_25);
err |= __get_user(regs->UCreg_26, &sf->uc.uc_mcontext.regs.UCreg_26);
err |= __get_user(regs->UCreg_fp, &sf->uc.uc_mcontext.regs.UCreg_fp);
err |= __get_user(regs->UCreg_ip, &sf->uc.uc_mcontext.regs.UCreg_ip);
err |= __get_user(regs->UCreg_sp, &sf->uc.uc_mcontext.regs.UCreg_sp);
err |= __get_user(regs->UCreg_lr, &sf->uc.uc_mcontext.regs.UCreg_lr);
err |= __get_user(regs->UCreg_pc, &sf->uc.uc_mcontext.regs.UCreg_pc);
err |= __get_user(regs->UCreg_asr, &sf->uc.uc_mcontext.regs.UCreg_asr);
err |= !valid_user_regs(regs);
return err;
}
/*
* this routine will put a word on the processes privileged stack.
* the offset is how far from the base addr as stored in the THREAD.
* this routine assumes that all the privileged stacks are in our
* data space.
*/
static inline int
put_user_reg(struct task_struct *task, int offset, long data)
{
struct pt_regs newregs, *regs = task_pt_regs(task);
int ret = -EINVAL;
newregs = *regs;
newregs.uregs[offset] = data;
if (valid_user_regs(&newregs)) {
regs->uregs[offset] = data;
ret = 0;
}
return ret;
}
/*
* OK, we're invoking a handler
*/
static int
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
int usig = sig;
int ret;
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return ret;
}
/*
* Block the signal if we were successful.
*/
spin_lock_irq(&tsk->sighand->siglock);
sigorsets(&tsk->blocked, &tsk->blocked,
&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&tsk->blocked, sig);
recalc_sigpending();
spin_unlock_irq(&tsk->sighand->siglock);
return 0;
}
static int gpr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int ret;
struct user_pt_regs newregs;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1);
if (ret)
return ret;
if (!valid_user_regs(&newregs))
return -EINVAL;
task_pt_regs(target)->user_regs = newregs;
return 0;
}
/*
* OK, we're invoking a handler
*/
static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
{
struct task_struct *tsk = current;
int usig = sig;
int ret;
/*
* translate the signal
*/
if (usig < 32 && tsk->exec_domain && tsk->exec_domain->signal_invmap)
usig = tsk->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret == 0) {
if (ka->sa.sa_flags & SA_ONESHOT)
ka->sa.sa_handler = SIG_DFL;
if (!(ka->sa.sa_flags & SA_NODEFER)) {
spin_lock_irq(&tsk->sigmask_lock);
sigorsets(&tsk->blocked, &tsk->blocked,
&ka->sa.sa_mask);
sigaddset(&tsk->blocked, sig);
recalc_sigpending(tsk);
spin_unlock_irq(&tsk->sigmask_lock);
}
return;
}
if (sig == SIGSEGV)
ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, tsk);
}
static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
{
char __user *aux;
sigset_t set;
int err;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (err == 0)
set_current_blocked(&set);
__get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
__get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
__get_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
__get_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
__get_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
__get_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
__get_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
__get_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
__get_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
__get_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
__get_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
__get_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
__get_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
__get_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
__get_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
__get_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
__get_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
err |= !valid_user_regs(regs);
aux = (char __user *) sf->uc.uc_regspace;
#ifdef CONFIG_CRUNCH
if (err == 0)
err |= restore_crunch_context(&aux);
#endif
#ifdef CONFIG_IWMMXT
if (err == 0)
err |= restore_iwmmxt_context(&aux);
#endif
#ifdef CONFIG_VFP
if (err == 0)
err |= restore_vfp_context(&aux);
#endif
return err;
}
static int ptrace_setregs(struct task_struct *tsk, const void __user *uregs)
{
struct pt_regs newregs;
int ret;
ret = -EFAULT;
if (copy_from_user(&newregs, uregs, sizeof(newregs)) == 0) {
struct pt_regs *regs = get_user_regs(tsk);
ret = -EINVAL;
if (valid_user_regs(&newregs)) {
*regs = newregs;
ret = 0;
}
}
return ret;
}
/*
* OK, we're invoking a handler
*/
static int
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
int usig = sig;
int ret;
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
#ifdef CONFIG_SHLOG_SYSTEM
rlog_app_start( current, 0, 0, sig, 0, regs );
#endif /* CONFIG_SHLOG_SYSTEM */
force_sigsegv(sig, tsk);
return ret;
}
/*
* Block the signal if we were successful.
*/
block_sigmask(ka, sig);
return 0;
}
/*
* OK, we're invoking a handler
*/
static void handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, struct pt_regs *regs)
{
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = sig;
int ret;
/*
* Set up the stack frame
*/
if (is_compat_task()) {
if (ka->sa.sa_flags & SA_SIGINFO)
ret = compat_setup_rt_frame(usig, ka, info, oldset,
regs);
else
ret = compat_setup_frame(usig, ka, oldset, regs);
} else {
ret = setup_rt_frame(usig, ka, info, oldset, regs);
}
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(®s->user_regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return;
}
/*
* Fast forward the stepping logic so we step into the signal
* handler.
*/
user_fastforward_single_step(tsk);
signal_delivered(sig, info, ka, regs, 0);
}
static inline void
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
struct pt_regs *regs, int syscall)
{
int ret;
/*
* Set up the stack frame
*/
ret = setup_rt_frame(sig, ka, info, sigmask_to_save(), regs);
/*
* Check that the resulting registers are sane
*/
ret |= !valid_user_regs(regs);
/*
* Block the signal if we were successful.
*/
if (ret != 0)
force_sigsegv(sig, current);
else
signal_delivered(sig, info, ka, regs, 0);
}
/*
* OK, we're invoking a handler
*/
static int
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset,
struct pt_regs * regs, int syscall)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
int usig = sig;
int ret;
/*
* If we were from a system call, check for system call restarting...
*/
if (syscall) {
switch (regs->ARM_r0) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
regs->ARM_r0 = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
regs->ARM_r0 = -EINTR;
break;
}
/* fallthrough */
case -ERESTARTNOINTR:
setup_syscall_restart(regs);
}
}
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return ret;
}
/*
* Block the signal if we were successful.
*/
spin_lock_irq(&tsk->sighand->siglock);
sigorsets(&tsk->blocked, &tsk->blocked,
&ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&tsk->blocked, sig);
recalc_sigpending();
spin_unlock_irq(&tsk->sighand->siglock);
return 0;
}
