Пример #1
0
static inline void __user *get_sigframe(struct k_sigaction *ka,
					struct pt_regs *regs, size_t frame_size)
{
	unsigned long sp = regs->sp;
	int onsigstack = on_sig_stack(sp);

	/*         */
	sp -= STACK_FRAME_OVERHEAD;

	/*                                                        */
	if ((ka->sa.sa_flags & SA_ONSTACK) && !onsigstack) {
		if (current->sas_ss_size)
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	sp = align_sigframe(sp - frame_size);

	/*
                                                                         
                                                                       
  */
	if (onsigstack && !likely(on_sig_stack(sp)))
		return (void __user *)-1L;

	return (void __user *)sp;
}
Пример #2
0
/*
 * Determine which stack to use..
 */
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->gprs[15];

	/* Overflow on alternate signal stack gives SIGSEGV. */
	if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL))
		return (void __user *) -1UL;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! sas_ss_flags(sp))
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	/* This is the legacy signal stack switching. */
	else if (!user_mode(regs) &&
		 !(ka->sa.sa_flags & SA_RESTORER) &&
		 ka->sa.sa_restorer) {
		sp = (unsigned long) ka->sa.sa_restorer;
	}

	return (void __user *)((sp - frame_size) & -8ul);
}
Пример #3
0
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;

	/*
	 * If we are on the alternate signal stack and would overflow it, don't.
	 * Return an always-bogus address instead so we will die with SIGSEGV.
	 */
	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
		return (void __user *) -1L;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (sas_ss_flags(sp) == 0)
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	sp -= framesize;

	/* Always align the stack frame.  This handles two cases.  First,
	 * sigaltstack need not be mindful of platform specific stack
	 * alignment.  Second, if we took this signal because the stack
	 * is not aligned properly, we'd like to take the signal cleanly
	 * and report that.
	 */
	sp &= ~15UL;

	return (void __user *) sp;
}
Пример #4
0
/*
 * Determine which stack to use..
 */
static inline void __user *get_sigframe(struct k_sigaction *ka,
					struct pt_regs *regs,
					size_t frame_size)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->sp;

	/*
	 * If we are on the alternate signal stack and would overflow
	 * it, don't.  Return an always-bogus address instead so we
	 * will die with SIGSEGV.
	 */
	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
		return (void __user __force *)-1UL;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (sas_ss_flags(sp) == 0)
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	sp -= frame_size;
	/*
	 * Align the stack pointer according to the TILE ABI,
	 * i.e. so that on function entry (sp & 15) == 0.
	 */
	sp &= -16UL;
	return (void __user *) sp;
}
Пример #5
0
static inline void __user *get_sigframe(struct ksignal *ksig,
					struct pt_regs *regs, int framesize)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->sp;

	/*
	 * If we are on the alternate signal stack and would overflow it, don't.
	 * Return an always-bogus address instead so we will die with SIGSEGV.
	 */
	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
		return (void __user __force *)(-1UL);

	/* This is the X/Open sanctioned signal stack switching. */
	sp = (sigsp(sp, ksig) - framesize);

	/*
	 * nds32 mandates 8-byte alignment
	 */
	sp &= ~0x7UL;

	return (void __user *)sp;
}
Пример #6
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
	     void __user **fpstate)
{
	/* Default to using normal stack */
	unsigned long math_size = 0;
	unsigned long sp = regs->sp;
	unsigned long buf_fx = 0;
	int onsigstack = on_sig_stack(sp);

	/* redzone */
	if (config_enabled(CONFIG_X86_64))
		sp -= 128;

	if (!onsigstack) {
		/* This is the X/Open sanctioned signal stack switching.  */
		if (ka->sa.sa_flags & SA_ONSTACK) {
			if (current->sas_ss_size)
				sp = current->sas_ss_sp + current->sas_ss_size;
		} else if (config_enabled(CONFIG_X86_32) &&
			   (regs->ss & 0xffff) != __USER_DS &&
#ifdef CONFIG_KERNEL_MODE_LINUX
			   (regs->sp > TASK_SIZE) &&
#endif
			   !(ka->sa.sa_flags & SA_RESTORER) &&
			   ka->sa.sa_restorer) {
				/* This is the legacy signal stack switching. */
				sp = (unsigned long) ka->sa.sa_restorer;
		}
	}

	if (used_math()) {
		sp = alloc_mathframe(sp, config_enabled(CONFIG_X86_32),
				     &buf_fx, &math_size);
		*fpstate = (void __user *)sp;
	}

	sp = align_sigframe(sp - frame_size);

	/*
	 * If we are on the alternate signal stack and would overflow it, don't.
	 * Return an always-bogus address instead so we will die with SIGSEGV.
	 */
	if (onsigstack && !likely(on_sig_stack(sp)))
		return (void __user *)-1L;

	/* save i387 and extended state */
	if (used_math() &&
	    save_xstate_sig(*fpstate, (void __user *)buf_fx, math_size) < 0)
		return (void __user *)-1L;

	return (void __user *)sp;
}
Пример #7
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
	     void __user **fpstate)
{
	/* Default to using normal stack */
	unsigned long sp = regs->sp;
	int onsigstack = on_sig_stack(sp);

#ifdef CONFIG_X86_64
	/* redzone */
	sp -= 128;
#endif /* CONFIG_X86_64 */

	if (!onsigstack) {
		/* This is the X/Open sanctioned signal stack switching.  */
		if (ka->sa.sa_flags & SA_ONSTACK) {
			if (current->sas_ss_size)
				sp = current->sas_ss_sp + current->sas_ss_size;
		} else {
#ifdef CONFIG_X86_32
			/* This is the legacy signal stack switching. */
			if ((regs->ss & 0xffff) != __USER_DS &&
				!(ka->sa.sa_flags & SA_RESTORER) &&
					ka->sa.sa_restorer)
				sp = (unsigned long) ka->sa.sa_restorer;
#endif /* CONFIG_X86_32 */
		}
	}

	if (used_math()) {
		sp -= sig_xstate_size;
#ifdef CONFIG_X86_64
		sp = round_down(sp, 64);
#endif /* CONFIG_X86_64 */
		*fpstate = (void __user *)sp;
	}

	sp = align_sigframe(sp - frame_size);

	/*
	 * If we are on the alternate signal stack and would overflow it, don't.
	 * Return an always-bogus address instead so we will die with SIGSEGV.
	 */
	if (onsigstack && !likely(on_sig_stack(sp)))
		return (void __user *)-1L;

	/* save i387 state */
	if (used_math() && save_i387_xstate(*fpstate) < 0)
		return (void __user *)-1L;

	return (void __user *)sp;
}
Пример #8
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
	     void __user **fpstate)
{
	/*                               */
	unsigned long sp = regs->sp;
	int onsigstack = on_sig_stack(sp);

#ifdef CONFIG_X86_64
	/*         */
	sp -= 128;
#endif /*               */

	if (!onsigstack) {
		/*                                                        */
		if (ka->sa.sa_flags & SA_ONSTACK) {
			if (current->sas_ss_size)
				sp = current->sas_ss_sp + current->sas_ss_size;
		} else {
#ifdef CONFIG_X86_32
			/*                                            */
			if ((regs->ss & 0xffff) != __USER_DS &&
				!(ka->sa.sa_flags & SA_RESTORER) &&
					ka->sa.sa_restorer)
				sp = (unsigned long) ka->sa.sa_restorer;
#endif /*               */
		}
	}

	if (used_math()) {
		sp -= sig_xstate_size;
#ifdef CONFIG_X86_64
		sp = round_down(sp, 64);
#endif /*               */
		*fpstate = (void __user *)sp;
	}

	sp = align_sigframe(sp - frame_size);

	/*
                                                                         
                                                                       
  */
	if (onsigstack && !likely(on_sig_stack(sp)))
		return (void __user *)-1L;

	/*                 */
	if (used_math() && save_i387_xstate(*fpstate) < 0)
		return (void __user *)-1L;

	return (void __user *)sp;
}
Пример #9
0
/*
 * This does just the minimum required setup of sigcontext.
 * Specifically, it only installs data that is either not knowable at
 * the user-level or that gets modified before execution in the
 * trampoline starts.  Everything else is done at the user-level.
 */
static long
setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratch *scr)
{
	unsigned long flags = 0, ifs, cfm, nat;
	long err;

	ifs = scr->pt.cr_ifs;

	if (on_sig_stack((unsigned long) sc))
		flags |= IA64_SC_FLAG_ONSTACK;
	if ((ifs & (1UL << 63)) == 0)
		/* if cr_ifs doesn't have the valid bit set, we got here through a syscall */
		flags |= IA64_SC_FLAG_IN_SYSCALL;
	cfm = ifs & ((1UL << 38) - 1);
	ia64_flush_fph(current);
	if ((current->thread.flags & IA64_THREAD_FPH_VALID)) {
		flags |= IA64_SC_FLAG_FPH_VALID;
		__copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16);
	}

	nat = ia64_get_scratch_nat_bits(&scr->pt, scr->scratch_unat);

	err  = __put_user(flags, &sc->sc_flags);
	err |= __put_user(nat, &sc->sc_nat);
	err |= PUT_SIGSET(mask, &sc->sc_mask);
	err |= __put_user(cfm, &sc->sc_cfm);
	err |= __put_user(scr->pt.cr_ipsr & IA64_PSR_UM, &sc->sc_um);
	err |= __put_user(scr->pt.ar_rsc, &sc->sc_ar_rsc);
	err |= __put_user(scr->pt.ar_unat, &sc->sc_ar_unat);		/* ar.unat */
	err |= __put_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr);		/* ar.fpsr */
	err |= __put_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
	err |= __put_user(scr->pt.pr, &sc->sc_pr);			/* predicates */
	err |= __put_user(scr->pt.b0, &sc->sc_br[0]);			/* b0 (rp) */
	err |= __put_user(scr->pt.b6, &sc->sc_br[6]);			/* b6 */
	err |= __copy_to_user(&sc->sc_gr[1], &scr->pt.r1, 8);		/* r1 */
	err |= __copy_to_user(&sc->sc_gr[8], &scr->pt.r8, 4*8);		/* r8-r11 */
	err |= __copy_to_user(&sc->sc_gr[12], &scr->pt.r12, 2*8);	/* r12-r13 */
	err |= __copy_to_user(&sc->sc_gr[15], &scr->pt.r15, 8);		/* r15 */
	err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip);

	if (flags & IA64_SC_FLAG_IN_SYSCALL) {
		/* Clear scratch registers if the signal interrupted a system call. */
		err |= __put_user(0, &sc->sc_ar_ccv);				/* ar.ccv */
		err |= __put_user(0, &sc->sc_br[7]);				/* b7 */
		err |= __put_user(0, &sc->sc_gr[14]);				/* r14 */
		err |= __clear_user(&sc->sc_ar25, 2*8);			/* ar.csd & ar.ssd */
		err |= __clear_user(&sc->sc_gr[2], 2*8);			/* r2-r3 */
		err |= __clear_user(&sc->sc_gr[16], 16*8);			/* r16-r31 */
	} else {
		/* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */
		err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv);		/* ar.ccv */
		err |= __put_user(scr->pt.b7, &sc->sc_br[7]);			/* b7 */
		err |= __put_user(scr->pt.r14, &sc->sc_gr[14]);			/* r14 */
		err |= __copy_to_user(&sc->sc_ar25, &scr->pt.ar_csd, 2*8); /* ar.csd & ar.ssd */
		err |= __copy_to_user(&sc->sc_gr[2], &scr->pt.r2, 2*8);		/* r2-r3 */
		err |= __copy_to_user(&sc->sc_gr[16], &scr->pt.r16, 16*8);	/* r16-r31 */
	}
	return err;
}
Пример #10
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
{
	if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp))
		sp = current->sas_ss_sp + current->sas_ss_size;

	return (void __user *)((sp - frame_size) & -32ul);
}
Пример #11
0
/*
 * Set up the sigcontext structure for this process.
 * This is not an easy task if the kernel is 64-bit, it will require
 * that we examine the process personality to determine if we need to
 * truncate for a 32-bit userspace.
 */
long
setup_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf, 
		struct pt_regs *regs, int in_syscall)		 
{
	compat_int_t flags = 0;
	long err = 0;
	compat_uint_t compat_reg;
	compat_uint_t compat_regb;
	int regn;
	
	if (on_sig_stack((unsigned long) sc))
		flags |= PARISC_SC_FLAG_ONSTACK;
	
	if (in_syscall) {
		
		DBG(1,"setup_sigcontext32: in_syscall\n");
		
		flags |= PARISC_SC_FLAG_IN_SYSCALL;
		/* Truncate gr31 */
		compat_reg = (compat_uint_t)(regs->gr[31]);
		/* regs->iaoq is undefined in the syscall return path */
		err |= __put_user(compat_reg, &sc->sc_iaoq[0]);
		DBG(2,"setup_sigcontext32: sc->sc_iaoq[0] = %p <= %#x\n",
				&sc->sc_iaoq[0], compat_reg);
		
		/* Store upper half */
		compat_reg = (compat_uint_t)(regs->gr[31] >> 32);
		err |= __put_user(compat_reg, &rf->rf_iaoq[0]);
		DBG(2,"setup_sigcontext32: upper half iaoq[0] = %#x\n", compat_reg);
		
		
		compat_reg = (compat_uint_t)(regs->gr[31]+4);
		err |= __put_user(compat_reg, &sc->sc_iaoq[1]);
		DBG(2,"setup_sigcontext32: sc->sc_iaoq[1] = %p <= %#x\n",
				&sc->sc_iaoq[1], compat_reg);
		/* Store upper half */
		compat_reg = (compat_uint_t)((regs->gr[31]+4) >> 32);
		err |= __put_user(compat_reg, &rf->rf_iaoq[1]);
		DBG(2,"setup_sigcontext32: upper half iaoq[1] = %#x\n", compat_reg);
		
		/* Truncate sr3 */
		compat_reg = (compat_uint_t)(regs->sr[3]);
		err |= __put_user(compat_reg, &sc->sc_iasq[0]);
		err |= __put_user(compat_reg, &sc->sc_iasq[1]);		
		
		/* Store upper half */
		compat_reg = (compat_uint_t)(regs->sr[3] >> 32);
		err |= __put_user(compat_reg, &rf->rf_iasq[0]);
		err |= __put_user(compat_reg, &rf->rf_iasq[1]);		
		
		DBG(2,"setup_sigcontext32: upper half iasq[0] = %#x\n", compat_reg);
		DBG(2,"setup_sigcontext32: upper half iasq[1] = %#x\n", compat_reg);		
		DBG(1,"setup_sigcontext32: iaoq %#lx / %#lx\n",				
			regs->gr[31], regs->gr[31]+4);
		
	} else {
Пример #12
0
static long
setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, 
		 unsigned long mask, unsigned long sp)
{
	struct switch_stack *sw = (struct switch_stack *)regs - 1;
	long i, err = 0;

	err |= __put_user(on_sig_stack((unsigned long)sc), &sc->sc_onstack);
	err |= __put_user(mask, &sc->sc_mask);
	err |= __put_user(regs->pc, &sc->sc_pc);
	err |= __put_user(8, &sc->sc_ps);

	err |= __put_user(regs->r0 , sc->sc_regs+0);
	err |= __put_user(regs->r1 , sc->sc_regs+1);
	err |= __put_user(regs->r2 , sc->sc_regs+2);
	err |= __put_user(regs->r3 , sc->sc_regs+3);
	err |= __put_user(regs->r4 , sc->sc_regs+4);
	err |= __put_user(regs->r5 , sc->sc_regs+5);
	err |= __put_user(regs->r6 , sc->sc_regs+6);
	err |= __put_user(regs->r7 , sc->sc_regs+7);
	err |= __put_user(regs->r8 , sc->sc_regs+8);
	err |= __put_user(sw->r9   , sc->sc_regs+9);
	err |= __put_user(sw->r10  , sc->sc_regs+10);
	err |= __put_user(sw->r11  , sc->sc_regs+11);
	err |= __put_user(sw->r12  , sc->sc_regs+12);
	err |= __put_user(sw->r13  , sc->sc_regs+13);
	err |= __put_user(sw->r14  , sc->sc_regs+14);
	err |= __put_user(sw->r15  , sc->sc_regs+15);
	err |= __put_user(regs->r16, sc->sc_regs+16);
	err |= __put_user(regs->r17, sc->sc_regs+17);
	err |= __put_user(regs->r18, sc->sc_regs+18);
	err |= __put_user(regs->r19, sc->sc_regs+19);
	err |= __put_user(regs->r20, sc->sc_regs+20);
	err |= __put_user(regs->r21, sc->sc_regs+21);
	err |= __put_user(regs->r22, sc->sc_regs+22);
	err |= __put_user(regs->r23, sc->sc_regs+23);
	err |= __put_user(regs->r24, sc->sc_regs+24);
	err |= __put_user(regs->r25, sc->sc_regs+25);
	err |= __put_user(regs->r26, sc->sc_regs+26);
	err |= __put_user(regs->r27, sc->sc_regs+27);
	err |= __put_user(regs->r28, sc->sc_regs+28);
	err |= __put_user(regs->gp , sc->sc_regs+29);
	err |= __put_user(sp, sc->sc_regs+30);
	err |= __put_user(0, sc->sc_regs+31);

	for (i = 0; i < 31; i++)
		err |= __put_user(sw->fp[i], sc->sc_fpregs+i);
	err |= __put_user(0, sc->sc_fpregs+31);
	err |= __put_user(sw->fp[31], &sc->sc_fpcr);

	err |= __put_user(regs->trap_a0, &sc->sc_traparg_a0);
	err |= __put_user(regs->trap_a1, &sc->sc_traparg_a1);
	err |= __put_user(regs->trap_a2, &sc->sc_traparg_a2);

	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;

	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
		return (void __user *) -1L;

	
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (sas_ss_flags(sp) == 0)
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	sp -= framesize;

	sp &= ~15UL;

	return (void __user *) sp;
}
Пример #14
0
/*
 * Determine which stack to use..
 */
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
	     void **fpstate)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->sp;

	/*
	 * If we are on the alternate signal stack and would overflow it, don't.
	 * Return an always-bogus address instead so we will die with SIGSEGV.
	 */
	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
		return (void __user *) -1L;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (sas_ss_flags(sp) == 0)
			sp = current->sas_ss_sp + current->sas_ss_size;
	} else {
		/* This is the legacy signal stack switching. */
		if ((regs->ss & 0xffff) != __USER_DS &&
			!(ka->sa.sa_flags & SA_RESTORER) &&
				ka->sa.sa_restorer)
			sp = (unsigned long) ka->sa.sa_restorer;
	}

	if (used_math()) {
		sp = sp - sig_xstate_size;
		*fpstate = (struct _fpstate *) sp;
	}

	sp -= frame_size;
	/*
	 * Align the stack pointer according to the i386 ABI,
	 * i.e. so that on function entry ((sp + 4) & 15) == 0.
	 */
	sp = ((sp + 4) & -16ul) - 4;

	return (void __user *) sp;
}
Пример #15
0
/*
 * This does just the minimum required setup of sigcontext.
 * Specifically, it only installs data that is either not knowable at
 * the user-level or that gets modified before execution in the
 * trampoline starts.  Everything else is done at the user-level.
 */
static long
setup_sigcontext (struct sigcontext *sc, sigset_t *mask, struct sigscratch *scr)
{
	unsigned long flags = 0, ifs, cfm, nat;
	long err;

	ifs = scr->pt.cr_ifs;

	if (on_sig_stack((unsigned long) sc))
		flags |= IA64_SC_FLAG_ONSTACK;
	if ((ifs & (1UL << 63)) == 0) {
		/* if cr_ifs isn't valid, we got here through a syscall */
		flags |= IA64_SC_FLAG_IN_SYSCALL;
		cfm = scr->pad & ((1UL << 38) - 1);
	} else
		cfm = ifs & ((1UL << 38) - 1);
	ia64_flush_fph(current);
	if ((current->thread.flags & IA64_THREAD_FPH_VALID)) {
		flags |= IA64_SC_FLAG_FPH_VALID;
		__copy_to_user(&sc->sc_fr[32], current->thread.fph, 96*16);
	}

	/*
	 * Note: sw->ar_unat is UNDEFINED unless the process is being
	 * PTRACED.  However, this is OK because the NaT bits of the
	 * preserved registers (r4-r7) are never being looked at by
	 * the signal handler (registers r4-r7 are used instead).
	 */
	nat = ia64_get_scratch_nat_bits(&scr->pt, scr->scratch_unat);

	err  = __put_user(flags, &sc->sc_flags);

	err |= __put_user(nat, &sc->sc_nat);
	err |= PUT_SIGSET(mask, &sc->sc_mask);
	err |= __put_user(cfm, &sc->sc_cfm);
	err |= __put_user(scr->pt.cr_ipsr & IA64_PSR_UM, &sc->sc_um);
	err |= __put_user(scr->pt.ar_rsc, &sc->sc_ar_rsc);
	err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv);
	err |= __put_user(scr->pt.ar_unat, &sc->sc_ar_unat);		/* ar.unat */
	err |= __put_user(scr->pt.ar_fpsr, &sc->sc_ar_fpsr);		/* ar.fpsr */
	err |= __put_user(scr->pt.ar_pfs, &sc->sc_ar_pfs);
	err |= __put_user(scr->pt.pr, &sc->sc_pr);			/* predicates */
	err |= __put_user(scr->pt.b0, &sc->sc_br[0]);			/* b0 (rp) */
	err |= __put_user(scr->pt.b6, &sc->sc_br[6]);			/* b6 */
	err |= __put_user(scr->pt.b7, &sc->sc_br[7]);			/* b7 */

	err |= __copy_to_user(&sc->sc_gr[1], &scr->pt.r1, 3*8);		/* r1-r3 */
	err |= __copy_to_user(&sc->sc_gr[8], &scr->pt.r8, 4*8);		/* r8-r11 */
	err |= __copy_to_user(&sc->sc_gr[12], &scr->pt.r12, 4*8);	/* r12-r15 */
	err |= __copy_to_user(&sc->sc_gr[16], &scr->pt.r16, 16*8);	/* r16-r31 */

	err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip);
	return err;
}
Пример #16
0
/*
 * Determine which stack to use..
 */
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
	/* Default to using normal stack */
	unsigned long sp = regs->gpr[GPR_SP];

	if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp))
		sp = current->sas_ss_sp + current->sas_ss_size;

	return (void *)((sp - frame_size) & -8UL);
}
static inline void __user *compat_get_sigframe(struct k_sigaction *ka,
					       struct pt_regs *regs,
					       size_t frame_size)
{
	unsigned long sp;

	
	sp = (unsigned long)compat_ptr(regs->sp);

	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
		return (void __user __force *)-1UL;

	
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (sas_ss_flags(sp) == 0)
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	sp -= frame_size;
	sp &= -16UL;
	return (void __user *) sp;
}
Пример #18
0
static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
{
	unsigned long sp;

	sp = regs->u_regs[UREG_FP] + STACK_BIAS;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (!on_sig_stack(sp) &&
		    !((current->sas_ss_sp + current->sas_ss_size) & 7))
			sp = current->sas_ss_sp + current->sas_ss_size;
	}
	return (void __user *)(sp - framesize);
}
Пример #19
0
static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
				 size_t frame_size)
{
	unsigned long usp;

	/* Default to using normal stack.  */
	usp = rdusp();

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (!on_sig_stack(usp))
			usp = current->sas_ss_sp + current->sas_ss_size;
	}
	return (void *)((usp - frame_size) & -8UL);
}
Пример #20
0
asmlinkage int
do_sys_sigstack(struct sigstack __user *ssptr, struct sigstack __user *ossptr,
		unsigned long sp)
{
	int ret = -EFAULT;

	/* First see if old state is wanted. */
	if (ossptr) {
		if (put_user(current->sas_ss_sp + current->sas_ss_size,
			     &ossptr->the_stack) ||
		    __put_user(on_sig_stack(sp), &ossptr->cur_status))
			goto out;
	}

	/* Now see if we want to update the new state. */
	if (ssptr) {
		char *ss_sp;

		if (get_user(ss_sp, &ssptr->the_stack))
			goto out;
		/* If the current stack was set with sigaltstack, don't
		   swap stacks while we are on it.  */
		ret = -EPERM;
		if (current->sas_ss_sp && on_sig_stack(sp))
			goto out;

		/* Since we don't know the extent of the stack, and we don't
		   track onstack-ness, but rather calculate it, we must
		   presume a size.  Ho hum this interface is lossy.  */
		current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
		current->sas_ss_size = SIGSTKSZ;
	}
	ret = 0;
out:
	return ret;
}
Пример #21
0
/*
 * Allocate space for the signal frame
 */
static inline void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
				  size_t frame_size)
{
        unsigned long newsp;

        /* Default to using normal stack */
        newsp = regs->gpr[1];

	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! on_sig_stack(regs->gpr[1]))
			newsp = (current->sas_ss_sp + current->sas_ss_size);
	}

        return (void __user *)((newsp - frame_size) & -16ul);
}
Пример #22
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
	unsigned long sp = rdusp();

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! on_sig_stack(sp))
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	/* make sure the frame is dword-aligned */

	sp &= ~3;

	return (void __user*)(sp - frame_size);
}
Пример #23
0
/*
 * Determine which stack to use..
 */
static inline void __user *get_sigframe(struct k_sigaction *ka,
					struct pt_regs *regs,
					size_t frame_size)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->sp;

	/* This is the X/Open sanctioned signal stack switching.  */
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! on_sig_stack(sp))
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	return (void __user *) ((sp - frame_size) & ~7UL);
} /* end get_sigframe() */
Пример #24
0
/*
 * Allocate space for the signal frame
 */
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
        unsigned long newsp;

        /* Default to using normal stack */
        newsp = regs->gpr[1];

	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! on_sig_stack(regs->gpr[1]))
			newsp = (current->sas_ss_sp + current->sas_ss_size);
	}

	/* The ABI requires quadword alignment for the stack. */
	return (void *)((newsp - frame_size) & -16ul);

}
Пример #25
0
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
	unsigned long sp = rdusp();

	
	if (ka->sa.sa_flags & SA_ONSTACK) {
		if (! on_sig_stack(sp))
			sp = current->sas_ss_sp + current->sas_ss_size;
	}

	

	sp &= ~3;

	return (void __user*)(sp - frame_size);
}
Пример #26
0
static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
				 unsigned long framesize)
{
	unsigned long sp = regs->ARM_sp;

	/*
	 * This is the X/Open sanctioned signal stack switching.
	 */
	if ((ka->sa.sa_flags & SA_ONSTACK) && ! on_sig_stack(sp))
		sp = current->sas_ss_sp + current->sas_ss_size;

	/*
	 * No matter what happens, 'sp' must be word
	 * aligned otherwise nasty things could happen
	 */
	sp &= ~3;

	return (void *)(sp - framesize);
}
Пример #27
0
/*
 * Determine which stack to use..
 */
static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
	size_t frame_size)
{
	unsigned long sp;

	/* Default to using normal stack */
	sp = regs->regs[29];

	/*
 	 * FPU emulator may have it's own trampoline active just
 	 * above the user stack, 16-bytes before the next lowest
 	 * 16 byte boundary.  Try to avoid trashing it.
 	 */
 	sp -= 32;

	/* This is the X/Open sanctioned signal stack switching.  */
	if ((ka->sa.sa_flags & SA_ONSTACK) && ! on_sig_stack(sp))
		sp = current->sas_ss_sp + current->sas_ss_size;

	return (void *)((sp - frame_size) & ALMASK);
}
Пример #28
0
/*
 * Allocate space for the signal frame
 */
void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
                           size_t frame_size)
{
    unsigned long oldsp, newsp;

    /* Default to using normal stack */
    oldsp = regs->gpr[1];

    /* Check for alt stack */
    if ((ka->sa.sa_flags & SA_ONSTACK) &&
            current->sas_ss_size && !on_sig_stack(oldsp))
        oldsp = (current->sas_ss_sp + current->sas_ss_size);

    /* Get aligned frame */
    newsp = (oldsp - frame_size) & ~0xFUL;

    /* Check access */
    if (!access_ok(VERIFY_WRITE, (void __user *)newsp, oldsp - newsp))
        return NULL;

    return (void __user *)newsp;
}
Пример #29
0
void __user * get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
			   size_t frame_size, int is_32)
{
        unsigned long oldsp, newsp;

        
        oldsp = get_clean_sp(regs, is_32);

	
	if ((ka->sa.sa_flags & SA_ONSTACK) &&
	    current->sas_ss_size && !on_sig_stack(oldsp))
		oldsp = (current->sas_ss_sp + current->sas_ss_size);

	
	newsp = (oldsp - frame_size) & ~0xFUL;

	
	if (!access_ok(VERIFY_WRITE, (void __user *)newsp, oldsp - newsp))
		return NULL;

        return (void __user *)newsp;
}
Пример #30
0
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 */
int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
	siginfo_t info;
	struct k_sigaction ka;
	unsigned long frame, newsp;
	int signr, ret;

	if (!oldset)
		oldset = &current->blocked;

	newsp = frame = 0;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	if (TRAP(regs) == 0x0C00		/* System Call! */
	    && regs->ccr & 0x10000000		/* error signalled */
	    && ((ret = regs->gpr[3]) == ERESTARTSYS
		|| ret == ERESTARTNOHAND || ret == ERESTARTNOINTR
		|| ret == ERESTART_RESTARTBLOCK)) {

		if (signr > 0
		    && (ret == ERESTARTNOHAND || ret == ERESTART_RESTARTBLOCK
			|| (ret == ERESTARTSYS
			    && !(ka.sa.sa_flags & SA_RESTART)))) {
			/* make the system call return an EINTR error */
			regs->result = -EINTR;
			regs->gpr[3] = EINTR;
			/* note that the cr0.SO bit is already set */
		} else {
			regs->nip -= 4;	/* Back up & retry system call */
			regs->result = 0;
			regs->trap = 0;
			if (ret == ERESTART_RESTARTBLOCK)
				regs->gpr[0] = __NR_restart_syscall;
			else
				regs->gpr[3] = regs->orig_gpr3;
		}
	}

	if (signr == 0)
		return 0;		/* no signals delivered */

	if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
	    && !on_sig_stack(regs->gpr[1]))
		newsp = current->sas_ss_sp + current->sas_ss_size;
	else
		newsp = regs->gpr[1];
	newsp &= ~0xfUL;

	/* Whee!  Actually deliver the signal.  */
	if (ka.sa.sa_flags & SA_SIGINFO)
		handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
	else
		handle_signal(signr, &ka, &info, oldset, regs, newsp);

	if (!(ka.sa.sa_flags & SA_NODEFER)) {
		spin_lock_irq(&current->sighand->siglock);
		sigorsets(&current->blocked,&current->blocked,&ka.sa.sa_mask);
		sigaddset(&current->blocked, signr);
		recalc_sigpending();
		spin_unlock_irq(&current->sighand->siglock);
	}

	return 1;
}