C++ (Cpp) copy_sc_from_userの例

コード例 #1

ファイル: signal.c プロジェクト: 3sOx/asuswrt-merlin

long sys_rt_sigreturn(struct pt_regs regs)
{
	unsigned long sp = PT_REGS_SP(&current->thread.regs);
	struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (sp - 4);
	sigset_t set;
	struct ucontext __user *uc = &frame->uc;
	int sig_size = _NSIG_WORDS * sizeof(unsigned long);

	if(copy_from_user(&set, &uc->uc_sigmask, sig_size))
		goto segfault;

	sigdelsetmask(&set, ~_BLOCKABLE);

	spin_lock_irq(&current->sighand->siglock);
	current->blocked = set;
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);

	if(copy_sc_from_user(&current->thread.regs, &uc->uc_mcontext))
		goto segfault;

	/* Avoid ERESTART handling */
	PT_REGS_SYSCALL_NR(&current->thread.regs) = -1;
	return PT_REGS_SYSCALL_RET(&current->thread.regs);

 segfault:
	force_sig(SIGSEGV, current);
	return 0;
}

コード例 #2

ファイル: signal.c プロジェクト: 3sOx/asuswrt-merlin

long sys_sigreturn(struct pt_regs regs)
{
	unsigned long sp = PT_REGS_SP(&current->thread.regs);
	struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
	sigset_t set;
	struct sigcontext __user *sc = &frame->sc;
	unsigned long __user *oldmask = &sc->oldmask;
	unsigned long __user *extramask = frame->extramask;
	int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long);

	if(copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) ||
	   copy_from_user(&set.sig[1], extramask, sig_size))
		goto segfault;

	sigdelsetmask(&set, ~_BLOCKABLE);

	spin_lock_irq(&current->sighand->siglock);
	current->blocked = set;
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);

	if(copy_sc_from_user(&current->thread.regs, sc))
		goto segfault;

	/* Avoid ERESTART handling */
	PT_REGS_SYSCALL_NR(&current->thread.regs) = -1;
	return PT_REGS_SYSCALL_RET(&current->thread.regs);

 segfault:
	force_sig(SIGSEGV, current);
	return 0;
}

コード例 #3

ファイル: signal_kern.c プロジェクト: 12019/hg556a_source

int sys_rt_sigreturn(struct pt_regs regs)
{
	struct ucontext *uc = sp_to_uc(PT_REGS_SP(&current->thread.regs));
	void *fp;
	int sig_size = _NSIG_WORDS * sizeof(unsigned long);

	spin_lock_irq(&current->sighand->siglock);
	copy_from_user(&current->blocked, &uc->uc_sigmask, sig_size);
	sigdelsetmask(&current->blocked, ~_BLOCKABLE);
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);
	fp = (void *) (((unsigned long) uc) + sizeof(struct ucontext));
	copy_sc_from_user(&current->thread.regs, &uc->uc_mcontext,
			  &signal_frame_si.common.arch);
	return(PT_REGS_SYSCALL_RET(&current->thread.regs));
}

コード例 #4

ファイル: signal_kern.c プロジェクト: 12019/hg556a_source

int sys_sigreturn(struct pt_regs regs)
{
	void *sc = sp_to_sc(PT_REGS_SP(&current->thread.regs));
	void *mask = sp_to_mask(PT_REGS_SP(&current->thread.regs));
	int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long);

	spin_lock_irq(&current->sighand->siglock);
	copy_from_user(&current->blocked.sig[0], sc_sigmask(sc), 
		       sizeof(current->blocked.sig[0]));
	copy_from_user(&current->blocked.sig[1], mask, sig_size);
	sigdelsetmask(&current->blocked, ~_BLOCKABLE);
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);
	copy_sc_from_user(&current->thread.regs, sc, 
			  &signal_frame_sc.common.arch);
	return(PT_REGS_SYSCALL_RET(&current->thread.regs));
}