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linux_machdep.c revision 1.11.2.5
      1  1.11.2.5  jdolecek /*	$NetBSD: linux_machdep.c,v 1.11.2.5 2002/10/10 18:38:01 jdolecek Exp $ */
      2       1.1      manu 
      3       1.1      manu /*-
      4       1.1      manu  * Copyright (c) 1995, 2000, 2001 The NetBSD Foundation, Inc.
      5       1.1      manu  * All rights reserved.
      6       1.1      manu  *
      7       1.1      manu  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1      manu  * by Frank van der Linden and Emmanuel Dreyfus.
      9       1.1      manu  *
     10       1.1      manu  * Redistribution and use in source and binary forms, with or without
     11       1.1      manu  * modification, are permitted provided that the following conditions
     12       1.1      manu  * are met:
     13       1.1      manu  * 1. Redistributions of source code must retain the above copyright
     14       1.1      manu  *    notice, this list of conditions and the following disclaimer.
     15       1.1      manu  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1      manu  *    notice, this list of conditions and the following disclaimer in the
     17       1.1      manu  *    documentation and/or other materials provided with the distribution.
     18       1.1      manu  * 3. All advertising materials mentioning features or use of this software
     19       1.1      manu  *    must display the following acknowledgement:
     20       1.1      manu  *	This product includes software developed by the NetBSD
     21       1.1      manu  *	Foundation, Inc. and its contributors.
     22       1.1      manu  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23       1.1      manu  *    contributors may be used to endorse or promote products derived
     24       1.1      manu  *    from this software without specific prior written permission.
     25       1.1      manu  *
     26       1.1      manu  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27       1.1      manu  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28       1.1      manu  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29       1.1      manu  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30       1.1      manu  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31       1.1      manu  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32       1.1      manu  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33       1.1      manu  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34       1.1      manu  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35       1.1      manu  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36       1.1      manu  * POSSIBILITY OF SUCH DAMAGE.
     37       1.1      manu  */
     38  1.11.2.1   thorpej 
     39  1.11.2.1   thorpej #include <sys/cdefs.h>
     40  1.11.2.5  jdolecek __KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.11.2.5 2002/10/10 18:38:01 jdolecek Exp $");
     41       1.1      manu 
     42       1.1      manu #include <sys/param.h>
     43       1.1      manu #include <sys/systm.h>
     44       1.1      manu #include <sys/signalvar.h>
     45       1.1      manu #include <sys/kernel.h>
     46       1.1      manu #include <sys/proc.h>
     47       1.1      manu #include <sys/user.h>
     48       1.1      manu #include <sys/buf.h>
     49       1.1      manu #include <sys/reboot.h>
     50       1.1      manu #include <sys/conf.h>
     51       1.1      manu #include <sys/exec.h>
     52       1.1      manu #include <sys/file.h>
     53       1.1      manu #include <sys/callout.h>
     54       1.1      manu #include <sys/malloc.h>
     55       1.1      manu #include <sys/mbuf.h>
     56       1.1      manu #include <sys/msgbuf.h>
     57       1.1      manu #include <sys/mount.h>
     58       1.1      manu #include <sys/vnode.h>
     59       1.1      manu #include <sys/device.h>
     60       1.1      manu #include <sys/syscallargs.h>
     61       1.1      manu #include <sys/filedesc.h>
     62       1.1      manu #include <sys/exec_elf.h>
     63       1.1      manu #include <sys/disklabel.h>
     64       1.3      manu #include <sys/ioctl.h>
     65       1.1      manu #include <miscfs/specfs/specdev.h>
     66       1.1      manu 
     67       1.1      manu #include <compat/linux/common/linux_types.h>
     68       1.1      manu #include <compat/linux/common/linux_signal.h>
     69       1.1      manu #include <compat/linux/common/linux_util.h>
     70       1.1      manu #include <compat/linux/common/linux_ioctl.h>
     71       1.1      manu #include <compat/linux/common/linux_hdio.h>
     72       1.1      manu #include <compat/linux/common/linux_exec.h>
     73       1.1      manu #include <compat/linux/common/linux_machdep.h>
     74       1.1      manu 
     75       1.1      manu #include <compat/linux/linux_syscallargs.h>
     76       1.1      manu 
     77       1.1      manu #include <machine/cpu.h>
     78      1.11       wiz #include <machine/fpu.h>
     79       1.1      manu #include <machine/psl.h>
     80       1.1      manu #include <machine/reg.h>
     81       1.1      manu #include <machine/vmparam.h>
     82       1.1      manu 
     83       1.1      manu /*
     84       1.1      manu  * To see whether wscons is configured (for virtual console ioctl calls).
     85       1.1      manu  */
     86      1.10       mrg #if defined(_KERNEL_OPT)
     87       1.1      manu #include "wsdisplay.h"
     88       1.1      manu #endif
     89       1.1      manu #if (NWSDISPLAY > 0)
     90       1.1      manu #include <dev/wscons/wsconsio.h>
     91       1.1      manu #include <dev/wscons/wsdisplay_usl_io.h>
     92       1.1      manu #endif
     93       1.1      manu 
     94       1.1      manu /*
     95       1.1      manu  * Set set up registers on exec.
     96       1.1      manu  * XXX not used at the moment since in sys/kern/exec_conf, LINUX_COMPAT
     97       1.1      manu  * entry uses NetBSD's native setregs instead of linux_setregs
     98       1.1      manu  */
     99       1.1      manu void
    100       1.1      manu linux_setregs(p, pack, stack)
    101       1.1      manu 	struct proc *p;
    102       1.1      manu 	struct exec_package *pack;
    103       1.1      manu 	u_long stack;
    104       1.1      manu {
    105       1.1      manu 	setregs(p, pack, stack);
    106       1.1      manu }
    107       1.1      manu 
    108       1.1      manu /*
    109       1.1      manu  * Send an interrupt to process.
    110       1.1      manu  *
    111       1.1      manu  * Adapted from arch/powerpc/powerpc/sig_machdep.c:sendsig and
    112       1.1      manu  * compat/linux/arch/i386/linux_machdep.c:linux_sendsig
    113       1.1      manu  *
    114       1.6      manu  * XXX Does not work well yet with RT signals
    115       1.1      manu  *
    116       1.1      manu  */
    117       1.1      manu 
    118       1.1      manu void
    119  1.11.2.4  jdolecek linux_sendsig(sig, mask, code)  /* XXX Check me */
    120       1.1      manu 	int sig;
    121       1.1      manu 	sigset_t *mask;
    122       1.1      manu 	u_long code;
    123       1.1      manu {
    124       1.1      manu 	struct proc *p = curproc;
    125       1.1      manu 	struct trapframe *tf;
    126  1.11.2.4  jdolecek 	sig_t catcher = SIGACTION(p, sig).sa_handler;
    127       1.8      manu 	struct linux_sigregs frame;
    128       1.4  christos 	struct linux_pt_regs linux_regs;
    129       1.1      manu 	struct linux_sigcontext sc;
    130       1.8      manu 	register_t fp;
    131       1.1      manu 	int onstack;
    132       1.1      manu 	int i;
    133       1.1      manu 
    134       1.1      manu 	tf = trapframe(p);
    135       1.1      manu 
    136       1.1      manu 	/*
    137       1.1      manu 	 * Do we need to jump onto the signal stack?
    138       1.1      manu 	 */
    139       1.1      manu 	onstack =
    140       1.1      manu 	    (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
    141       1.1      manu 	    (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
    142       1.1      manu 
    143       1.1      manu 	/*
    144       1.1      manu 	 * Signal stack is broken (see at the end of linux_sigreturn), so we do
    145       1.1      manu 	 * not use it yet. XXX fix this.
    146       1.1      manu 	 */
    147       1.1      manu 	onstack=0;
    148       1.1      manu 
    149       1.1      manu 	/*
    150       1.1      manu 	 * Allocate space for the signal handler context.
    151       1.1      manu 	 */
    152       1.4  christos 	if (onstack) {
    153       1.8      manu 		fp = (register_t)
    154       1.4  christos 		    ((caddr_t)p->p_sigctx.ps_sigstk.ss_sp +
    155       1.1      manu 		    p->p_sigctx.ps_sigstk.ss_size);
    156       1.4  christos 	} else {
    157       1.8      manu 		fp = tf->fixreg[1];
    158       1.4  christos 	}
    159       1.8      manu #ifdef DEBUG_LINUX
    160       1.8      manu 	printf("fp at start of linux_sendsig = %x\n", fp);
    161       1.8      manu #endif
    162       1.8      manu 	fp -= sizeof(struct linux_sigregs);
    163       1.8      manu 	fp &= ~0xf;
    164       1.1      manu 
    165       1.1      manu 	/*
    166       1.1      manu 	 * Prepare a sigcontext for later.
    167       1.1      manu 	 */
    168       1.8      manu 	memset(&sc, 0, sizeof sc);
    169  1.11.2.3  jdolecek 	sc.lsignal = (int)native_to_linux_signo[sig];
    170       1.1      manu 	sc.lhandler = (unsigned long)catcher;
    171  1.11.2.2  jdolecek 	native_to_linux_old_extra_sigset(&sc.lmask, &sc._unused[3], mask);
    172       1.1      manu 	sc.lregs = (struct linux_pt_regs*)fp;
    173       1.1      manu 
    174       1.1      manu 	/*
    175       1.1      manu 	 * Setup the signal stack frame as Linux does it in
    176       1.1      manu 	 * arch/ppc/kernel/signal.c:setup_frame()
    177       1.1      manu 	 *
    178       1.1      manu 	 * Save register context.
    179       1.1      manu 	 */
    180       1.4  christos 	for (i = 0; i < 32; i++)
    181       1.1      manu 		linux_regs.lgpr[i] = tf->fixreg[i];
    182       1.1      manu 	linux_regs.lnip = tf->srr0;
    183       1.1      manu 	linux_regs.lmsr = tf->srr1;
    184       1.1      manu 	linux_regs.lorig_gpr3 = tf->fixreg[3]; /* XXX Is that right? */
    185       1.1      manu 	linux_regs.lctr = tf->ctr;
    186       1.1      manu 	linux_regs.llink = tf->lr;
    187       1.1      manu 	linux_regs.lxer = tf->xer;
    188       1.1      manu 	linux_regs.lccr = tf->cr;
    189       1.1      manu 	linux_regs.lmq = 0;  			/* Unused, 601 only */
    190       1.8      manu 	linux_regs.ltrap = tf->exc;
    191       1.1      manu 	linux_regs.ldar = tf->dar;
    192       1.8      manu 	linux_regs.ldsisr = tf->dsisr;
    193       1.8      manu 	linux_regs.lresult = 0;
    194       1.8      manu 
    195       1.8      manu 	memset(&frame, 0, sizeof(frame));
    196       1.8      manu 	memcpy(&frame.lgp_regs, &linux_regs, sizeof(linux_regs));
    197       1.1      manu 
    198  1.11.2.4  jdolecek 	save_fpu_proc(curproc);
    199       1.8      manu 	memcpy(&frame.lfp_regs, curpcb->pcb_fpu.fpr, sizeof(frame.lfp_regs));
    200       1.1      manu 
    201       1.1      manu 	/*
    202       1.4  christos 	 * Copy Linux's signal trampoline on the user stack It should not
    203       1.6      manu 	 * be used, but Linux binaries might expect it to be there.
    204       1.1      manu 	 */
    205       1.4  christos 	frame.ltramp[0] = 0x38997777; /* li r0, 0x7777 */
    206       1.4  christos 	frame.ltramp[1] = 0x44000002; /* sc */
    207       1.1      manu 
    208       1.1      manu 	/*
    209       1.1      manu 	 * Move it to the user stack
    210       1.1      manu 	 * There is a little trick here, about the LINUX_ABIGAP: the
    211       1.1      manu 	 * linux_sigreg structure has a 56 int gap to support rs6000/xcoff
    212       1.1      manu 	 * binaries. But the Linux kernel seems to do without it, and it
    213       1.1      manu 	 * just skip it when building the stack frame. Hence the LINUX_ABIGAP.
    214       1.1      manu 	 */
    215       1.8      manu 	if (copyout(&frame, (caddr_t)fp, sizeof (frame) - LINUX_ABIGAP) != 0) {
    216       1.1      manu 		/*
    217       1.1      manu 		 * Process has trashed its stack; give it an illegal
    218       1.9      manu 		 * instruction to halt it in its tracks.
    219       1.1      manu 		 */
    220       1.1      manu 		sigexit(p, SIGILL);
    221       1.1      manu 		/* NOTREACHED */
    222       1.1      manu 	}
    223       1.1      manu 
    224       1.1      manu 	/*
    225       1.1      manu 	 * Add a sigcontext on the stack
    226       1.1      manu 	 */
    227       1.8      manu 	fp -= sizeof(struct linux_sigcontext);
    228       1.8      manu 	if (copyout(&sc, (caddr_t)fp, sizeof (struct linux_sigcontext)) != 0) {
    229       1.1      manu 		/*
    230       1.1      manu 		 * Process has trashed its stack; give it an illegal
    231       1.9      manu 		 * instruction to halt it in its tracks.
    232       1.1      manu 		 */
    233       1.1      manu 		sigexit(p, SIGILL);
    234       1.1      manu 		/* NOTREACHED */
    235       1.1      manu 	}
    236       1.1      manu 
    237       1.1      manu 	/*
    238       1.8      manu 	 * Set the registers according to how the Linux process expects them.
    239       1.8      manu 	 * "Mind the gap" Linux expects a gap here.
    240       1.1      manu 	 */
    241       1.8      manu 	tf->fixreg[1] = fp - LINUX__SIGNAL_FRAMESIZE;
    242       1.1      manu 	tf->lr = (int)catcher;
    243  1.11.2.3  jdolecek 	tf->fixreg[3] = (int)native_to_linux_signo[sig];
    244       1.8      manu 	tf->fixreg[4] = fp;
    245       1.1      manu 	tf->srr0 = (int)p->p_sigctx.ps_sigcode;
    246       1.1      manu 
    247       1.8      manu #ifdef DEBUG_LINUX
    248       1.8      manu 	printf("fp at end of linux_sendsig = %x\n", fp);
    249       1.8      manu #endif
    250       1.1      manu 	/*
    251       1.1      manu 	 * Remember that we're now on the signal stack.
    252       1.1      manu 	 */
    253       1.1      manu 	if (onstack)
    254       1.1      manu 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    255       1.1      manu #ifdef DEBUG_LINUX
    256       1.1      manu 	printf("linux_sendsig: exitting. fp=0x%lx\n",(long)fp);
    257       1.1      manu #endif
    258       1.1      manu }
    259       1.1      manu 
    260       1.1      manu /*
    261       1.1      manu  * System call to cleanup state after a signal
    262       1.1      manu  * has been taken.  Reset signal mask and
    263       1.1      manu  * stack state from context left by sendsig (above).
    264       1.1      manu  * Return to previous pc and psl as specified by
    265       1.1      manu  * context left by sendsig. Check carefully to
    266       1.1      manu  * make sure that the user has not modified the
    267       1.1      manu  * psl to gain improper privileges or to cause
    268       1.1      manu  * a machine fault.
    269       1.1      manu  *
    270       1.1      manu  * XXX not tested
    271       1.1      manu  */
    272       1.1      manu int
    273       1.1      manu linux_sys_rt_sigreturn(p, v, retval)
    274       1.1      manu 	struct proc *p;
    275       1.1      manu 	void *v;
    276       1.1      manu 	register_t *retval;
    277       1.1      manu {
    278       1.1      manu 	struct linux_sys_rt_sigreturn_args /* {
    279       1.1      manu 		syscallarg(struct linux_rt_sigframe *) sfp;
    280       1.1      manu 	} */ *uap = v;
    281       1.1      manu 	struct linux_rt_sigframe *scp, sigframe;
    282       1.8      manu 	struct linux_sigregs sregs;
    283       1.8      manu 	struct linux_pt_regs *lregs;
    284       1.1      manu 	struct trapframe *tf;
    285       1.1      manu 	sigset_t mask;
    286       1.1      manu 	int i;
    287       1.1      manu 
    288       1.1      manu 	/*
    289       1.1      manu 	 * The trampoline code hands us the context.
    290       1.1      manu 	 * It is unsafe to keep track of it ourselves, in the event that a
    291       1.1      manu 	 * program jumps out of a signal handler.
    292       1.1      manu 	 */
    293       1.1      manu 	scp = SCARG(uap, sfp);
    294       1.1      manu 
    295       1.1      manu 	/*
    296       1.1      manu 	 * Get the context from user stack
    297       1.1      manu 	 */
    298       1.8      manu 	if (copyin((caddr_t)scp, &sigframe, sizeof(*scp)))
    299       1.1      manu 		return (EFAULT);
    300       1.1      manu 
    301       1.1      manu 	/*
    302       1.8      manu 	 * Make sure, fpu is sync'ed
    303       1.1      manu 	 */
    304  1.11.2.4  jdolecek 	save_fpu_proc(curproc);
    305       1.1      manu 
    306       1.1      manu 	/*
    307       1.8      manu 	 *  Restore register context.
    308       1.1      manu 	 */
    309       1.8      manu 	if (copyin((caddr_t)sigframe.luc.luc_context.lregs,
    310       1.8      manu 		   &sregs, sizeof(sregs)))
    311       1.8      manu 		return (EFAULT);
    312       1.8      manu 	lregs = (struct linux_pt_regs *)&sregs.lgp_regs;
    313       1.8      manu 
    314       1.1      manu 	tf = trapframe(p);
    315       1.1      manu #ifdef DEBUG_LINUX
    316       1.1      manu 	printf("linux_sys_sigreturn: trapframe=0x%lx scp=0x%lx\n",
    317       1.1      manu 	    (unsigned long)tf, (unsigned long)scp);
    318       1.1      manu #endif
    319       1.1      manu 
    320       1.8      manu 	if ((lregs->lmsr & PSL_USERSTATIC) !=  (tf->srr1 & PSL_USERSTATIC))
    321       1.1      manu 		return (EINVAL);
    322       1.1      manu 
    323       1.4  christos 	for (i = 0; i < 32; i++)
    324       1.8      manu 		tf->fixreg[i] = lregs->lgpr[i];
    325       1.8      manu 	tf->lr = lregs->llink;
    326       1.8      manu 	tf->cr = lregs->lccr;
    327       1.8      manu 	tf->xer = lregs->lxer;
    328       1.8      manu 	tf->ctr = lregs->lctr;
    329       1.8      manu 	tf->srr0 = lregs->lnip;
    330       1.8      manu 	tf->srr1 = lregs->lmsr;
    331       1.8      manu 
    332       1.8      manu 	memcpy(curpcb->pcb_fpu.fpr, (caddr_t)&sregs.lfp_regs,
    333       1.8      manu 	       sizeof(curpcb->pcb_fpu.fpr));
    334       1.1      manu 
    335       1.1      manu 	/*
    336       1.1      manu 	 * Restore signal stack.
    337       1.1      manu 	 *
    338       1.1      manu 	 * XXX cannot find the onstack information in Linux sig context.
    339       1.1      manu 	 * Is signal stack really supported on Linux?
    340       1.1      manu 	 *
    341       1.1      manu 	 * It seems to be supported in libc6...
    342       1.1      manu 	 */
    343       1.1      manu 	/* if (sc.sc_onstack & SS_ONSTACK)
    344       1.1      manu 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    345       1.1      manu 	else */
    346       1.1      manu 		p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
    347       1.1      manu 
    348       1.8      manu 	/*
    349       1.8      manu 	 * Grab the signal mask
    350       1.8      manu 	 */
    351  1.11.2.2  jdolecek 	linux_to_native_sigset(&mask, &sigframe.luc.luc_sigmask);
    352       1.8      manu 	(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
    353       1.8      manu 
    354       1.1      manu 	return (EJUSTRETURN);
    355       1.1      manu }
    356       1.1      manu 
    357       1.1      manu 
    358       1.1      manu /*
    359       1.1      manu  * The following needs code review for potential security issues
    360       1.1      manu  */
    361       1.1      manu int
    362       1.1      manu linux_sys_sigreturn(p, v, retval)
    363       1.1      manu 	struct proc *p;
    364       1.1      manu 	void *v;
    365       1.1      manu 	register_t *retval;
    366       1.1      manu {
    367       1.1      manu 	struct linux_sys_sigreturn_args /* {
    368       1.1      manu 		syscallarg(struct linux_sigcontext *) scp;
    369       1.1      manu 	} */ *uap = v;
    370       1.1      manu 	struct linux_sigcontext *scp, context;
    371       1.8      manu 	struct linux_sigregs sregs;
    372       1.8      manu 	struct linux_pt_regs *lregs;
    373       1.1      manu 	struct trapframe *tf;
    374       1.1      manu 	sigset_t mask;
    375       1.1      manu 	int i;
    376       1.1      manu 
    377       1.1      manu 	/*
    378       1.1      manu 	 * The trampoline code hands us the context.
    379       1.1      manu 	 * It is unsafe to keep track of it ourselves, in the event that a
    380       1.1      manu 	 * program jumps out of a signal handler.
    381       1.1      manu 	 */
    382       1.1      manu 	scp = SCARG(uap, scp);
    383       1.1      manu 
    384       1.1      manu 	/*
    385       1.8      manu 	 * Get the context from user stack
    386       1.1      manu 	 */
    387       1.8      manu 	if (copyin(scp, &context, sizeof(*scp)))
    388       1.8      manu 		return (EFAULT);
    389       1.1      manu 
    390       1.1      manu 	/*
    391       1.8      manu 	 * Make sure, fpu is in sync
    392       1.1      manu 	 */
    393  1.11.2.4  jdolecek 	save_fpu_proc(curproc);
    394       1.1      manu 
    395       1.1      manu 	/*
    396       1.8      manu 	 *  Restore register context.
    397       1.1      manu 	 */
    398       1.8      manu 	if (copyin((caddr_t)context.lregs, &sregs, sizeof(sregs)))
    399       1.8      manu 		return (EFAULT);
    400       1.8      manu 	lregs = (struct linux_pt_regs *)&sregs.lgp_regs;
    401       1.8      manu 
    402       1.1      manu 	tf = trapframe(p);
    403       1.1      manu #ifdef DEBUG_LINUX
    404       1.1      manu 	printf("linux_sys_sigreturn: trapframe=0x%lx scp=0x%lx\n",
    405       1.1      manu 	    (unsigned long)tf, (unsigned long)scp);
    406       1.1      manu #endif
    407       1.1      manu 
    408       1.8      manu 	if ((lregs->lmsr & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC))
    409       1.1      manu 		return (EINVAL);
    410       1.1      manu 
    411       1.4  christos 	for (i = 0; i < 32; i++)
    412       1.8      manu 		tf->fixreg[i] = lregs->lgpr[i];
    413       1.8      manu 	tf->lr = lregs->llink;
    414       1.8      manu 	tf->cr = lregs->lccr;
    415       1.8      manu 	tf->xer = lregs->lxer;
    416       1.8      manu 	tf->ctr = lregs->lctr;
    417       1.8      manu 	tf->srr0 = lregs->lnip;
    418       1.8      manu 	tf->srr1 = lregs->lmsr;
    419       1.8      manu 
    420       1.8      manu 	memcpy(curpcb->pcb_fpu.fpr, (caddr_t)&sregs.lfp_regs,
    421       1.8      manu 	       sizeof(curpcb->pcb_fpu.fpr));
    422       1.1      manu 
    423       1.1      manu 	/*
    424       1.1      manu 	 * Restore signal stack.
    425       1.1      manu 	 *
    426       1.1      manu 	 * XXX cannot find the onstack information in Linux sig context.
    427       1.1      manu 	 * Is signal stack really supported on Linux?
    428       1.1      manu 	 */
    429       1.4  christos #if 0
    430       1.4  christos 	if (sc.sc_onstack & SS_ONSTACK)
    431       1.1      manu 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    432       1.4  christos 	else
    433       1.4  christos #endif
    434       1.1      manu 		p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
    435       1.1      manu 
    436       1.1      manu 	/* Restore signal mask. */
    437  1.11.2.2  jdolecek 	linux_old_extra_to_native_sigset(&mask, &context.lmask,
    438  1.11.2.2  jdolecek 	    &context._unused[3]);
    439       1.1      manu 	(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
    440       1.1      manu 
    441       1.1      manu 	return (EJUSTRETURN);
    442       1.1      manu }
    443       1.1      manu 
    444       1.1      manu 
    445      1.11       wiz #if 0
    446       1.1      manu int
    447       1.1      manu linux_sys_modify_ldt(p, v, retval)
    448       1.1      manu 	struct proc *p;
    449       1.1      manu 	void *v;
    450       1.1      manu 	register_t *retval;
    451       1.1      manu {
    452       1.1      manu 	/*
    453       1.4  christos 	 * This syscall is not implemented in Linux/PowerPC: we should not
    454       1.4  christos 	 * be here
    455       1.1      manu 	 */
    456       1.1      manu #ifdef DEBUG_LINUX
    457       1.1      manu 	printf("linux_sys_modify_ldt: should not be here.\n");
    458       1.1      manu #endif
    459       1.1      manu   return 0;
    460       1.1      manu }
    461      1.11       wiz #endif
    462       1.1      manu 
    463       1.6      manu /*
    464       1.6      manu  * major device numbers remapping
    465       1.6      manu  */
    466       1.1      manu dev_t
    467  1.11.2.2  jdolecek linux_fakedev(dev, raw)
    468       1.1      manu 	dev_t dev;
    469  1.11.2.2  jdolecek 	int raw;
    470       1.1      manu {
    471  1.11.2.3  jdolecek 	/* XXX write me */
    472  1.11.2.3  jdolecek 	return dev;
    473       1.1      manu }
    474       1.1      manu 
    475       1.1      manu /*
    476       1.1      manu  * We come here in a last attempt to satisfy a Linux ioctl() call
    477       1.1      manu  */
    478       1.1      manu int
    479       1.1      manu linux_machdepioctl(p, v, retval)
    480       1.1      manu 	struct proc *p;
    481       1.1      manu 	void *v;
    482       1.1      manu 	register_t *retval;
    483       1.1      manu {
    484       1.1      manu 	struct linux_sys_ioctl_args /* {
    485       1.1      manu 		syscallarg(int) fd;
    486       1.1      manu 		syscallarg(u_long) com;
    487       1.1      manu 		syscallarg(caddr_t) data;
    488       1.1      manu 	} */ *uap = v;
    489       1.1      manu 	struct sys_ioctl_args bia;
    490       1.1      manu 	u_long com;
    491       1.1      manu 
    492       1.1      manu 	SCARG(&bia, fd) = SCARG(uap, fd);
    493       1.1      manu 	SCARG(&bia, data) = SCARG(uap, data);
    494       1.1      manu 	com = SCARG(uap, com);
    495       1.1      manu 
    496       1.1      manu 	switch (com) {
    497       1.1      manu 	default:
    498       1.1      manu 		printf("linux_machdepioctl: invalid ioctl %08lx\n", com);
    499       1.1      manu 		return EINVAL;
    500       1.1      manu 	}
    501       1.1      manu 	SCARG(&bia, com) = com;
    502       1.1      manu 	return sys_ioctl(p, &bia, retval);
    503       1.1      manu }
    504      1.11       wiz #if 0
    505       1.1      manu /*
    506       1.1      manu  * Set I/O permissions for a process. Just set the maximum level
    507       1.1      manu  * right away (ignoring the argument), otherwise we would have
    508       1.1      manu  * to rely on I/O permission maps, which are not implemented.
    509       1.1      manu  */
    510       1.1      manu int
    511       1.1      manu linux_sys_iopl(p, v, retval)
    512       1.1      manu 	struct proc *p;
    513       1.1      manu 	void *v;
    514       1.1      manu 	register_t *retval;
    515       1.1      manu {
    516       1.1      manu 	/*
    517       1.1      manu 	 * This syscall is not implemented in Linux/PowerPC: we should not be here
    518       1.1      manu 	 */
    519       1.1      manu #ifdef DEBUG_LINUX
    520       1.1      manu 	printf("linux_sys_iopl: should not be here.\n");
    521       1.1      manu #endif
    522       1.1      manu 	return 0;
    523       1.1      manu }
    524      1.11       wiz #endif
    525       1.1      manu 
    526       1.1      manu /*
    527       1.1      manu  * See above. If a root process tries to set access to an I/O port,
    528       1.1      manu  * just let it have the whole range.
    529       1.1      manu  */
    530       1.1      manu int
    531       1.1      manu linux_sys_ioperm(p, v, retval)
    532       1.1      manu 	struct proc *p;
    533       1.1      manu 	void *v;
    534       1.1      manu 	register_t *retval;
    535       1.1      manu {
    536       1.1      manu 	/*
    537       1.1      manu 	 * This syscall is not implemented in Linux/PowerPC: we should not be here
    538       1.1      manu 	 */
    539       1.1      manu #ifdef DEBUG_LINUX
    540       1.1      manu 	printf("linux_sys_ioperm: should not be here.\n");
    541       1.1      manu #endif
    542       1.1      manu 	return 0;
    543       1.1      manu }
    544       1.1      manu 
    545       1.1      manu /*
    546       1.1      manu  * wrapper linux_sys_new_uname() -> linux_sys_uname()
    547       1.1      manu  */
    548       1.1      manu int
    549       1.1      manu linux_sys_new_uname(p, v, retval)
    550       1.1      manu 	struct proc *p;
    551       1.1      manu 	void *v;
    552       1.1      manu 	register_t *retval;
    553       1.1      manu {
    554       1.1      manu 	return linux_sys_uname(p, v, retval);
    555       1.1      manu }
    556       1.1      manu 
    557       1.1      manu /*
    558       1.1      manu  * wrapper linux_sys_new_select() -> linux_sys_select()
    559       1.1      manu  */
    560       1.1      manu int
    561       1.1      manu linux_sys_new_select(p, v, retval)
    562       1.1      manu 	struct proc *p;
    563       1.1      manu 	void *v;
    564       1.1      manu 	register_t *retval;
    565       1.1      manu {
    566       1.1      manu 	return linux_sys_select(p, v, retval);
    567       1.1      manu }
    568