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linux_machdep.c revision 1.5.2.4
      1  1.5.2.4  bouyer /*	$NetBSD: linux_machdep.c,v 1.5.2.4 2001/04/21 17:46:18 bouyer Exp $ */
      2  1.5.2.2  bouyer 
      3  1.5.2.2  bouyer /*-
      4  1.5.2.2  bouyer  * Copyright (c) 1995, 2000, 2001 The NetBSD Foundation, Inc.
      5  1.5.2.2  bouyer  * All rights reserved.
      6  1.5.2.2  bouyer  *
      7  1.5.2.2  bouyer  * This code is derived from software contributed to The NetBSD Foundation
      8  1.5.2.2  bouyer  * by Frank van der Linden and Emmanuel Dreyfus.
      9  1.5.2.2  bouyer  *
     10  1.5.2.2  bouyer  * Redistribution and use in source and binary forms, with or without
     11  1.5.2.2  bouyer  * modification, are permitted provided that the following conditions
     12  1.5.2.2  bouyer  * are met:
     13  1.5.2.2  bouyer  * 1. Redistributions of source code must retain the above copyright
     14  1.5.2.2  bouyer  *    notice, this list of conditions and the following disclaimer.
     15  1.5.2.2  bouyer  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.5.2.2  bouyer  *    notice, this list of conditions and the following disclaimer in the
     17  1.5.2.2  bouyer  *    documentation and/or other materials provided with the distribution.
     18  1.5.2.2  bouyer  * 3. All advertising materials mentioning features or use of this software
     19  1.5.2.2  bouyer  *    must display the following acknowledgement:
     20  1.5.2.2  bouyer  *	This product includes software developed by the NetBSD
     21  1.5.2.2  bouyer  *	Foundation, Inc. and its contributors.
     22  1.5.2.2  bouyer  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  1.5.2.2  bouyer  *    contributors may be used to endorse or promote products derived
     24  1.5.2.2  bouyer  *    from this software without specific prior written permission.
     25  1.5.2.2  bouyer  *
     26  1.5.2.2  bouyer  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  1.5.2.2  bouyer  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  1.5.2.2  bouyer  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  1.5.2.2  bouyer  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  1.5.2.2  bouyer  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  1.5.2.2  bouyer  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  1.5.2.2  bouyer  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  1.5.2.2  bouyer  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  1.5.2.2  bouyer  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  1.5.2.2  bouyer  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  1.5.2.2  bouyer  * POSSIBILITY OF SUCH DAMAGE.
     37  1.5.2.2  bouyer  */
     38  1.5.2.2  bouyer 
     39  1.5.2.2  bouyer #include <sys/param.h>
     40  1.5.2.2  bouyer #include <sys/systm.h>
     41  1.5.2.2  bouyer #include <sys/signalvar.h>
     42  1.5.2.2  bouyer #include <sys/kernel.h>
     43  1.5.2.2  bouyer #include <sys/map.h>
     44  1.5.2.2  bouyer #include <sys/proc.h>
     45  1.5.2.2  bouyer #include <sys/user.h>
     46  1.5.2.2  bouyer #include <sys/buf.h>
     47  1.5.2.2  bouyer #include <sys/reboot.h>
     48  1.5.2.2  bouyer #include <sys/conf.h>
     49  1.5.2.2  bouyer #include <sys/exec.h>
     50  1.5.2.2  bouyer #include <sys/file.h>
     51  1.5.2.2  bouyer #include <sys/callout.h>
     52  1.5.2.2  bouyer #include <sys/malloc.h>
     53  1.5.2.2  bouyer #include <sys/mbuf.h>
     54  1.5.2.2  bouyer #include <sys/msgbuf.h>
     55  1.5.2.2  bouyer #include <sys/mount.h>
     56  1.5.2.2  bouyer #include <sys/vnode.h>
     57  1.5.2.2  bouyer #include <sys/device.h>
     58  1.5.2.2  bouyer #include <sys/syscallargs.h>
     59  1.5.2.2  bouyer #include <sys/filedesc.h>
     60  1.5.2.2  bouyer #include <sys/exec_elf.h>
     61  1.5.2.2  bouyer #include <sys/disklabel.h>
     62  1.5.2.2  bouyer #include <sys/ioctl.h>
     63  1.5.2.2  bouyer #include <miscfs/specfs/specdev.h>
     64  1.5.2.2  bouyer 
     65  1.5.2.2  bouyer #include <compat/linux/common/linux_types.h>
     66  1.5.2.2  bouyer #include <compat/linux/common/linux_signal.h>
     67  1.5.2.2  bouyer #include <compat/linux/common/linux_util.h>
     68  1.5.2.2  bouyer #include <compat/linux/common/linux_ioctl.h>
     69  1.5.2.2  bouyer #include <compat/linux/common/linux_hdio.h>
     70  1.5.2.2  bouyer #include <compat/linux/common/linux_exec.h>
     71  1.5.2.2  bouyer #include <compat/linux/common/linux_machdep.h>
     72  1.5.2.2  bouyer 
     73  1.5.2.2  bouyer #include <compat/linux/linux_syscallargs.h>
     74  1.5.2.2  bouyer 
     75  1.5.2.2  bouyer #include <machine/cpu.h>
     76  1.5.2.2  bouyer #include <machine/psl.h>
     77  1.5.2.2  bouyer #include <machine/reg.h>
     78  1.5.2.2  bouyer #include <machine/vmparam.h>
     79  1.5.2.2  bouyer 
     80  1.5.2.2  bouyer /*
     81  1.5.2.2  bouyer  * To see whether wscons is configured (for virtual console ioctl calls).
     82  1.5.2.2  bouyer  */
     83  1.5.2.2  bouyer #if defined(_KERNEL) && !defined(_LKM)
     84  1.5.2.2  bouyer #include "wsdisplay.h"
     85  1.5.2.2  bouyer #endif
     86  1.5.2.2  bouyer #if (NWSDISPLAY > 0)
     87  1.5.2.2  bouyer #include <dev/wscons/wsconsio.h>
     88  1.5.2.2  bouyer #include <dev/wscons/wsdisplay_usl_io.h>
     89  1.5.2.2  bouyer #if defined(_KERNEL) && !defined(_LKM)
     90  1.5.2.2  bouyer #endif
     91  1.5.2.2  bouyer #endif
     92  1.5.2.2  bouyer 
     93  1.5.2.2  bouyer /*
     94  1.5.2.2  bouyer  * Set set up registers on exec.
     95  1.5.2.2  bouyer  * XXX not used at the moment since in sys/kern/exec_conf, LINUX_COMPAT
     96  1.5.2.2  bouyer  * entry uses NetBSD's native setregs instead of linux_setregs
     97  1.5.2.2  bouyer  */
     98  1.5.2.2  bouyer void
     99  1.5.2.2  bouyer linux_setregs(p, pack, stack)
    100  1.5.2.2  bouyer 	struct proc *p;
    101  1.5.2.2  bouyer 	struct exec_package *pack;
    102  1.5.2.2  bouyer 	u_long stack;
    103  1.5.2.2  bouyer {
    104  1.5.2.2  bouyer 	setregs(p, pack, stack);
    105  1.5.2.2  bouyer }
    106  1.5.2.2  bouyer 
    107  1.5.2.2  bouyer /*
    108  1.5.2.2  bouyer  * Send an interrupt to process.
    109  1.5.2.2  bouyer  *
    110  1.5.2.2  bouyer  * Adapted from arch/powerpc/powerpc/sig_machdep.c:sendsig and
    111  1.5.2.2  bouyer  * compat/linux/arch/i386/linux_machdep.c:linux_sendsig
    112  1.5.2.2  bouyer  *
    113  1.5.2.3  bouyer  * XXX Does not work well yet with RT signals
    114  1.5.2.2  bouyer  *
    115  1.5.2.2  bouyer  */
    116  1.5.2.2  bouyer 
    117  1.5.2.2  bouyer void
    118  1.5.2.2  bouyer linux_sendsig(catcher, sig, mask, code)  /* XXX Check me */
    119  1.5.2.2  bouyer 	sig_t catcher;
    120  1.5.2.2  bouyer 	int sig;
    121  1.5.2.2  bouyer 	sigset_t *mask;
    122  1.5.2.2  bouyer 	u_long code;
    123  1.5.2.2  bouyer {
    124  1.5.2.2  bouyer 	struct proc *p = curproc;
    125  1.5.2.2  bouyer 	struct trapframe *tf;
    126  1.5.2.4  bouyer 	struct linux_sigregs frame;
    127  1.5.2.2  bouyer 	struct linux_pt_regs linux_regs;
    128  1.5.2.2  bouyer 	struct linux_sigcontext sc;
    129  1.5.2.4  bouyer 	register_t fp;
    130  1.5.2.2  bouyer 	int onstack;
    131  1.5.2.2  bouyer 	int i;
    132  1.5.2.2  bouyer 
    133  1.5.2.2  bouyer 	tf = trapframe(p);
    134  1.5.2.2  bouyer 
    135  1.5.2.2  bouyer 	/*
    136  1.5.2.2  bouyer 	 * Do we need to jump onto the signal stack?
    137  1.5.2.2  bouyer 	 */
    138  1.5.2.2  bouyer 	onstack =
    139  1.5.2.2  bouyer 	    (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
    140  1.5.2.2  bouyer 	    (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
    141  1.5.2.2  bouyer 
    142  1.5.2.2  bouyer 	/*
    143  1.5.2.2  bouyer 	 * Signal stack is broken (see at the end of linux_sigreturn), so we do
    144  1.5.2.2  bouyer 	 * not use it yet. XXX fix this.
    145  1.5.2.2  bouyer 	 */
    146  1.5.2.2  bouyer 	onstack=0;
    147  1.5.2.2  bouyer 
    148  1.5.2.2  bouyer 	/*
    149  1.5.2.2  bouyer 	 * Allocate space for the signal handler context.
    150  1.5.2.2  bouyer 	 */
    151  1.5.2.2  bouyer 	if (onstack) {
    152  1.5.2.4  bouyer 		fp = (register_t)
    153  1.5.2.2  bouyer 		    ((caddr_t)p->p_sigctx.ps_sigstk.ss_sp +
    154  1.5.2.2  bouyer 		    p->p_sigctx.ps_sigstk.ss_size);
    155  1.5.2.2  bouyer 	} else {
    156  1.5.2.4  bouyer 		fp = tf->fixreg[1];
    157  1.5.2.2  bouyer 	}
    158  1.5.2.4  bouyer #ifdef DEBUG_LINUX
    159  1.5.2.4  bouyer 	printf("fp at start of linux_sendsig = %x\n", fp);
    160  1.5.2.4  bouyer #endif
    161  1.5.2.4  bouyer 	fp -= sizeof(struct linux_sigregs);
    162  1.5.2.4  bouyer 	fp &= ~0xf;
    163  1.5.2.2  bouyer 
    164  1.5.2.2  bouyer 	/*
    165  1.5.2.2  bouyer 	 * Prepare a sigcontext for later.
    166  1.5.2.2  bouyer 	 */
    167  1.5.2.4  bouyer 	memset(&sc, 0, sizeof sc);
    168  1.5.2.2  bouyer 	sc.lsignal = (int)native_to_linux_sig[sig];
    169  1.5.2.2  bouyer 	sc.lhandler = (unsigned long)catcher;
    170  1.5.2.4  bouyer 	native_to_linux_old_extra_sigset(mask, &sc.lmask, &sc._unused[3]);
    171  1.5.2.2  bouyer 	sc.lregs = (struct linux_pt_regs*)fp;
    172  1.5.2.2  bouyer 
    173  1.5.2.2  bouyer 	/*
    174  1.5.2.2  bouyer 	 * Setup the signal stack frame as Linux does it in
    175  1.5.2.2  bouyer 	 * arch/ppc/kernel/signal.c:setup_frame()
    176  1.5.2.2  bouyer 	 *
    177  1.5.2.2  bouyer 	 * Save register context.
    178  1.5.2.2  bouyer 	 */
    179  1.5.2.2  bouyer 	for (i = 0; i < 32; i++)
    180  1.5.2.2  bouyer 		linux_regs.lgpr[i] = tf->fixreg[i];
    181  1.5.2.2  bouyer 	linux_regs.lnip = tf->srr0;
    182  1.5.2.2  bouyer 	linux_regs.lmsr = tf->srr1;
    183  1.5.2.2  bouyer 	linux_regs.lorig_gpr3 = tf->fixreg[3]; /* XXX Is that right? */
    184  1.5.2.2  bouyer 	linux_regs.lctr = tf->ctr;
    185  1.5.2.2  bouyer 	linux_regs.llink = tf->lr;
    186  1.5.2.2  bouyer 	linux_regs.lxer = tf->xer;
    187  1.5.2.2  bouyer 	linux_regs.lccr = tf->cr;
    188  1.5.2.2  bouyer 	linux_regs.lmq = 0;  			/* Unused, 601 only */
    189  1.5.2.4  bouyer 	linux_regs.ltrap = tf->exc;
    190  1.5.2.2  bouyer 	linux_regs.ldar = tf->dar;
    191  1.5.2.4  bouyer 	linux_regs.ldsisr = tf->dsisr;
    192  1.5.2.4  bouyer 	linux_regs.lresult = 0;
    193  1.5.2.2  bouyer 
    194  1.5.2.4  bouyer 	memset(&frame, 0, sizeof(frame));
    195  1.5.2.4  bouyer 	memcpy(&frame.lgp_regs, &linux_regs, sizeof(linux_regs));
    196  1.5.2.4  bouyer 
    197  1.5.2.4  bouyer 	if (curproc == fpuproc)
    198  1.5.2.4  bouyer 		save_fpu(curproc);
    199  1.5.2.4  bouyer 	memcpy(&frame.lfp_regs, curpcb->pcb_fpu.fpr, sizeof(frame.lfp_regs));
    200  1.5.2.2  bouyer 
    201  1.5.2.2  bouyer 	/*
    202  1.5.2.2  bouyer 	 * Copy Linux's signal trampoline on the user stack It should not
    203  1.5.2.3  bouyer 	 * be used, but Linux binaries might expect it to be there.
    204  1.5.2.2  bouyer 	 */
    205  1.5.2.2  bouyer 	frame.ltramp[0] = 0x38997777; /* li r0, 0x7777 */
    206  1.5.2.2  bouyer 	frame.ltramp[1] = 0x44000002; /* sc */
    207  1.5.2.2  bouyer 
    208  1.5.2.2  bouyer 	/*
    209  1.5.2.2  bouyer 	 * Move it to the user stack
    210  1.5.2.2  bouyer 	 * There is a little trick here, about the LINUX_ABIGAP: the
    211  1.5.2.2  bouyer 	 * linux_sigreg structure has a 56 int gap to support rs6000/xcoff
    212  1.5.2.2  bouyer 	 * binaries. But the Linux kernel seems to do without it, and it
    213  1.5.2.2  bouyer 	 * just skip it when building the stack frame. Hence the LINUX_ABIGAP.
    214  1.5.2.2  bouyer 	 */
    215  1.5.2.4  bouyer 	if (copyout(&frame, (caddr_t)fp, sizeof (frame) - LINUX_ABIGAP) != 0) {
    216  1.5.2.2  bouyer 		/*
    217  1.5.2.2  bouyer 		 * Process has trashed its stack; give it an illegal
    218  1.5.2.2  bouyer 		 * instructoin to halt it in its tracks.
    219  1.5.2.2  bouyer 		 */
    220  1.5.2.2  bouyer 		sigexit(p, SIGILL);
    221  1.5.2.2  bouyer 		/* NOTREACHED */
    222  1.5.2.2  bouyer 	}
    223  1.5.2.2  bouyer 
    224  1.5.2.2  bouyer 	/*
    225  1.5.2.2  bouyer 	 * Add a sigcontext on the stack
    226  1.5.2.2  bouyer 	 */
    227  1.5.2.4  bouyer 	fp -= sizeof(struct linux_sigcontext);
    228  1.5.2.4  bouyer 	if (copyout(&sc, (caddr_t)fp, sizeof (struct linux_sigcontext)) != 0) {
    229  1.5.2.2  bouyer 		/*
    230  1.5.2.2  bouyer 		 * Process has trashed its stack; give it an illegal
    231  1.5.2.2  bouyer 		 * instructoin to halt it in its tracks.
    232  1.5.2.2  bouyer 		 */
    233  1.5.2.2  bouyer 		sigexit(p, SIGILL);
    234  1.5.2.2  bouyer 		/* NOTREACHED */
    235  1.5.2.2  bouyer 	}
    236  1.5.2.2  bouyer 
    237  1.5.2.2  bouyer 	/*
    238  1.5.2.4  bouyer 	 * Set the registers according to how the Linux process expects them.
    239  1.5.2.4  bouyer 	 * "Mind the gap" Linux expects a gap here.
    240  1.5.2.2  bouyer 	 */
    241  1.5.2.4  bouyer 	tf->fixreg[1] = fp - LINUX__SIGNAL_FRAMESIZE;
    242  1.5.2.2  bouyer 	tf->lr = (int)catcher;
    243  1.5.2.3  bouyer 	tf->fixreg[3] = (int)native_to_linux_sig[sig];
    244  1.5.2.4  bouyer 	tf->fixreg[4] = fp;
    245  1.5.2.2  bouyer 	tf->srr0 = (int)p->p_sigctx.ps_sigcode;
    246  1.5.2.2  bouyer 
    247  1.5.2.4  bouyer #ifdef DEBUG_LINUX
    248  1.5.2.4  bouyer 	printf("fp at end of linux_sendsig = %x\n", fp);
    249  1.5.2.4  bouyer #endif
    250  1.5.2.2  bouyer 	/*
    251  1.5.2.2  bouyer 	 * Remember that we're now on the signal stack.
    252  1.5.2.2  bouyer 	 */
    253  1.5.2.2  bouyer 	if (onstack)
    254  1.5.2.2  bouyer 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    255  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    256  1.5.2.2  bouyer 	printf("linux_sendsig: exitting. fp=0x%lx\n",(long)fp);
    257  1.5.2.2  bouyer #endif
    258  1.5.2.2  bouyer }
    259  1.5.2.2  bouyer 
    260  1.5.2.2  bouyer /*
    261  1.5.2.2  bouyer  * System call to cleanup state after a signal
    262  1.5.2.2  bouyer  * has been taken.  Reset signal mask and
    263  1.5.2.2  bouyer  * stack state from context left by sendsig (above).
    264  1.5.2.2  bouyer  * Return to previous pc and psl as specified by
    265  1.5.2.2  bouyer  * context left by sendsig. Check carefully to
    266  1.5.2.2  bouyer  * make sure that the user has not modified the
    267  1.5.2.2  bouyer  * psl to gain improper privileges or to cause
    268  1.5.2.2  bouyer  * a machine fault.
    269  1.5.2.2  bouyer  *
    270  1.5.2.2  bouyer  * XXX not tested
    271  1.5.2.2  bouyer  */
    272  1.5.2.2  bouyer int
    273  1.5.2.2  bouyer linux_sys_rt_sigreturn(p, v, retval)
    274  1.5.2.2  bouyer 	struct proc *p;
    275  1.5.2.2  bouyer 	void *v;
    276  1.5.2.2  bouyer 	register_t *retval;
    277  1.5.2.2  bouyer {
    278  1.5.2.2  bouyer 	struct linux_sys_rt_sigreturn_args /* {
    279  1.5.2.2  bouyer 		syscallarg(struct linux_rt_sigframe *) sfp;
    280  1.5.2.2  bouyer 	} */ *uap = v;
    281  1.5.2.2  bouyer 	struct linux_rt_sigframe *scp, sigframe;
    282  1.5.2.4  bouyer 	struct linux_sigregs sregs;
    283  1.5.2.4  bouyer 	struct linux_pt_regs *lregs;
    284  1.5.2.2  bouyer 	struct trapframe *tf;
    285  1.5.2.2  bouyer 	sigset_t mask;
    286  1.5.2.2  bouyer 	int i;
    287  1.5.2.2  bouyer 
    288  1.5.2.2  bouyer 	/*
    289  1.5.2.2  bouyer 	 * The trampoline code hands us the context.
    290  1.5.2.2  bouyer 	 * It is unsafe to keep track of it ourselves, in the event that a
    291  1.5.2.2  bouyer 	 * program jumps out of a signal handler.
    292  1.5.2.2  bouyer 	 */
    293  1.5.2.2  bouyer 	scp = SCARG(uap, sfp);
    294  1.5.2.2  bouyer 
    295  1.5.2.2  bouyer 	/*
    296  1.5.2.2  bouyer 	 * Get the context from user stack
    297  1.5.2.2  bouyer 	 */
    298  1.5.2.4  bouyer 	if (copyin((caddr_t)scp, &sigframe, sizeof(*scp)))
    299  1.5.2.2  bouyer 		return (EFAULT);
    300  1.5.2.2  bouyer 
    301  1.5.2.2  bouyer 	/*
    302  1.5.2.4  bouyer 	 * Make sure, fpu is sync'ed
    303  1.5.2.2  bouyer 	 */
    304  1.5.2.4  bouyer 	if (curproc == fpuproc)
    305  1.5.2.4  bouyer 		save_fpu(curproc);
    306  1.5.2.2  bouyer 
    307  1.5.2.2  bouyer 	/*
    308  1.5.2.4  bouyer 	 *  Restore register context.
    309  1.5.2.2  bouyer 	 */
    310  1.5.2.4  bouyer 	if (copyin((caddr_t)sigframe.luc.luc_context.lregs,
    311  1.5.2.4  bouyer 		   &sregs, sizeof(sregs)))
    312  1.5.2.4  bouyer 		return (EFAULT);
    313  1.5.2.4  bouyer 	lregs = (struct linux_pt_regs *)&sregs.lgp_regs;
    314  1.5.2.4  bouyer 
    315  1.5.2.2  bouyer 	tf = trapframe(p);
    316  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    317  1.5.2.2  bouyer 	printf("linux_sys_sigreturn: trapframe=0x%lx scp=0x%lx\n",
    318  1.5.2.2  bouyer 	    (unsigned long)tf, (unsigned long)scp);
    319  1.5.2.2  bouyer #endif
    320  1.5.2.2  bouyer 
    321  1.5.2.4  bouyer 	if ((lregs->lmsr & PSL_USERSTATIC) !=  (tf->srr1 & PSL_USERSTATIC))
    322  1.5.2.2  bouyer 		return (EINVAL);
    323  1.5.2.2  bouyer 
    324  1.5.2.2  bouyer 	for (i = 0; i < 32; i++)
    325  1.5.2.4  bouyer 		tf->fixreg[i] = lregs->lgpr[i];
    326  1.5.2.4  bouyer 	tf->lr = lregs->llink;
    327  1.5.2.4  bouyer 	tf->cr = lregs->lccr;
    328  1.5.2.4  bouyer 	tf->xer = lregs->lxer;
    329  1.5.2.4  bouyer 	tf->ctr = lregs->lctr;
    330  1.5.2.4  bouyer 	tf->srr0 = lregs->lnip;
    331  1.5.2.4  bouyer 	tf->srr1 = lregs->lmsr;
    332  1.5.2.4  bouyer 
    333  1.5.2.4  bouyer 	memcpy(curpcb->pcb_fpu.fpr, (caddr_t)&sregs.lfp_regs,
    334  1.5.2.4  bouyer 	       sizeof(curpcb->pcb_fpu.fpr));
    335  1.5.2.2  bouyer 
    336  1.5.2.2  bouyer 	/*
    337  1.5.2.2  bouyer 	 * Restore signal stack.
    338  1.5.2.2  bouyer 	 *
    339  1.5.2.2  bouyer 	 * XXX cannot find the onstack information in Linux sig context.
    340  1.5.2.2  bouyer 	 * Is signal stack really supported on Linux?
    341  1.5.2.2  bouyer 	 *
    342  1.5.2.2  bouyer 	 * It seems to be supported in libc6...
    343  1.5.2.2  bouyer 	 */
    344  1.5.2.2  bouyer 	/* if (sc.sc_onstack & SS_ONSTACK)
    345  1.5.2.2  bouyer 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    346  1.5.2.2  bouyer 	else */
    347  1.5.2.2  bouyer 		p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
    348  1.5.2.2  bouyer 
    349  1.5.2.4  bouyer 	/*
    350  1.5.2.4  bouyer 	 * Grab the signal mask
    351  1.5.2.4  bouyer 	 */
    352  1.5.2.4  bouyer 	linux_to_native_sigset(&sigframe.luc.luc_sigmask, &mask);
    353  1.5.2.4  bouyer 	(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
    354  1.5.2.4  bouyer 
    355  1.5.2.2  bouyer 	return (EJUSTRETURN);
    356  1.5.2.2  bouyer }
    357  1.5.2.2  bouyer 
    358  1.5.2.2  bouyer 
    359  1.5.2.2  bouyer /*
    360  1.5.2.2  bouyer  * The following needs code review for potential security issues
    361  1.5.2.2  bouyer  */
    362  1.5.2.2  bouyer int
    363  1.5.2.2  bouyer linux_sys_sigreturn(p, v, retval)
    364  1.5.2.2  bouyer 	struct proc *p;
    365  1.5.2.2  bouyer 	void *v;
    366  1.5.2.2  bouyer 	register_t *retval;
    367  1.5.2.2  bouyer {
    368  1.5.2.2  bouyer 	struct linux_sys_sigreturn_args /* {
    369  1.5.2.2  bouyer 		syscallarg(struct linux_sigcontext *) scp;
    370  1.5.2.2  bouyer 	} */ *uap = v;
    371  1.5.2.2  bouyer 	struct linux_sigcontext *scp, context;
    372  1.5.2.4  bouyer 	struct linux_sigregs sregs;
    373  1.5.2.4  bouyer 	struct linux_pt_regs *lregs;
    374  1.5.2.2  bouyer 	struct trapframe *tf;
    375  1.5.2.2  bouyer 	sigset_t mask;
    376  1.5.2.2  bouyer 	int i;
    377  1.5.2.2  bouyer 
    378  1.5.2.2  bouyer 	/*
    379  1.5.2.2  bouyer 	 * The trampoline code hands us the context.
    380  1.5.2.2  bouyer 	 * It is unsafe to keep track of it ourselves, in the event that a
    381  1.5.2.2  bouyer 	 * program jumps out of a signal handler.
    382  1.5.2.2  bouyer 	 */
    383  1.5.2.2  bouyer 	scp = SCARG(uap, scp);
    384  1.5.2.2  bouyer 
    385  1.5.2.2  bouyer 	/*
    386  1.5.2.4  bouyer 	 * Get the context from user stack
    387  1.5.2.2  bouyer 	 */
    388  1.5.2.4  bouyer 	if (copyin(scp, &context, sizeof(*scp)))
    389  1.5.2.4  bouyer 		return (EFAULT);
    390  1.5.2.2  bouyer 
    391  1.5.2.2  bouyer 	/*
    392  1.5.2.4  bouyer 	 * Make sure, fpu is in sync
    393  1.5.2.2  bouyer 	 */
    394  1.5.2.4  bouyer 	if (curproc == fpuproc)
    395  1.5.2.4  bouyer 		save_fpu(curproc);
    396  1.5.2.2  bouyer 
    397  1.5.2.2  bouyer 	/*
    398  1.5.2.4  bouyer 	 *  Restore register context.
    399  1.5.2.2  bouyer 	 */
    400  1.5.2.4  bouyer 	if (copyin((caddr_t)context.lregs, &sregs, sizeof(sregs)))
    401  1.5.2.4  bouyer 		return (EFAULT);
    402  1.5.2.4  bouyer 	lregs = (struct linux_pt_regs *)&sregs.lgp_regs;
    403  1.5.2.4  bouyer 
    404  1.5.2.2  bouyer 	tf = trapframe(p);
    405  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    406  1.5.2.2  bouyer 	printf("linux_sys_sigreturn: trapframe=0x%lx scp=0x%lx\n",
    407  1.5.2.2  bouyer 	    (unsigned long)tf, (unsigned long)scp);
    408  1.5.2.2  bouyer #endif
    409  1.5.2.2  bouyer 
    410  1.5.2.4  bouyer 	if ((lregs->lmsr & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC))
    411  1.5.2.2  bouyer 		return (EINVAL);
    412  1.5.2.2  bouyer 
    413  1.5.2.2  bouyer 	for (i = 0; i < 32; i++)
    414  1.5.2.4  bouyer 		tf->fixreg[i] = lregs->lgpr[i];
    415  1.5.2.4  bouyer 	tf->lr = lregs->llink;
    416  1.5.2.4  bouyer 	tf->cr = lregs->lccr;
    417  1.5.2.4  bouyer 	tf->xer = lregs->lxer;
    418  1.5.2.4  bouyer 	tf->ctr = lregs->lctr;
    419  1.5.2.4  bouyer 	tf->srr0 = lregs->lnip;
    420  1.5.2.4  bouyer 	tf->srr1 = lregs->lmsr;
    421  1.5.2.4  bouyer 
    422  1.5.2.4  bouyer 	memcpy(curpcb->pcb_fpu.fpr, (caddr_t)&sregs.lfp_regs,
    423  1.5.2.4  bouyer 	       sizeof(curpcb->pcb_fpu.fpr));
    424  1.5.2.2  bouyer 
    425  1.5.2.2  bouyer 	/*
    426  1.5.2.2  bouyer 	 * Restore signal stack.
    427  1.5.2.2  bouyer 	 *
    428  1.5.2.2  bouyer 	 * XXX cannot find the onstack information in Linux sig context.
    429  1.5.2.2  bouyer 	 * Is signal stack really supported on Linux?
    430  1.5.2.2  bouyer 	 */
    431  1.5.2.2  bouyer #if 0
    432  1.5.2.2  bouyer 	if (sc.sc_onstack & SS_ONSTACK)
    433  1.5.2.2  bouyer 		p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
    434  1.5.2.2  bouyer 	else
    435  1.5.2.2  bouyer #endif
    436  1.5.2.2  bouyer 		p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
    437  1.5.2.2  bouyer 
    438  1.5.2.2  bouyer 	/* Restore signal mask. */
    439  1.5.2.4  bouyer 	linux_old_extra_to_native_sigset(&context.lmask,
    440  1.5.2.4  bouyer 					 &context._unused[3],
    441  1.5.2.4  bouyer 					 &mask);
    442  1.5.2.2  bouyer 	(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
    443  1.5.2.2  bouyer 
    444  1.5.2.2  bouyer 	return (EJUSTRETURN);
    445  1.5.2.2  bouyer }
    446  1.5.2.2  bouyer 
    447  1.5.2.2  bouyer 
    448  1.5.2.2  bouyer int
    449  1.5.2.2  bouyer linux_sys_modify_ldt(p, v, retval)
    450  1.5.2.2  bouyer 	struct proc *p;
    451  1.5.2.2  bouyer 	void *v;
    452  1.5.2.2  bouyer 	register_t *retval;
    453  1.5.2.2  bouyer {
    454  1.5.2.2  bouyer 	/*
    455  1.5.2.2  bouyer 	 * This syscall is not implemented in Linux/PowerPC: we should not
    456  1.5.2.2  bouyer 	 * be here
    457  1.5.2.2  bouyer 	 */
    458  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    459  1.5.2.2  bouyer 	printf("linux_sys_modify_ldt: should not be here.\n");
    460  1.5.2.2  bouyer #endif
    461  1.5.2.2  bouyer   return 0;
    462  1.5.2.2  bouyer }
    463  1.5.2.2  bouyer 
    464  1.5.2.3  bouyer /*
    465  1.5.2.3  bouyer  * major device numbers remapping
    466  1.5.2.3  bouyer  */
    467  1.5.2.2  bouyer dev_t
    468  1.5.2.2  bouyer linux_fakedev(dev)
    469  1.5.2.2  bouyer 	dev_t dev;
    470  1.5.2.2  bouyer {
    471  1.5.2.2  bouyer   /* XXX write me */
    472  1.5.2.2  bouyer   return dev;
    473  1.5.2.2  bouyer }
    474  1.5.2.2  bouyer 
    475  1.5.2.2  bouyer /*
    476  1.5.2.2  bouyer  * We come here in a last attempt to satisfy a Linux ioctl() call
    477  1.5.2.2  bouyer  */
    478  1.5.2.2  bouyer int
    479  1.5.2.2  bouyer linux_machdepioctl(p, v, retval)
    480  1.5.2.2  bouyer 	struct proc *p;
    481  1.5.2.2  bouyer 	void *v;
    482  1.5.2.2  bouyer 	register_t *retval;
    483  1.5.2.2  bouyer {
    484  1.5.2.2  bouyer 	struct linux_sys_ioctl_args /* {
    485  1.5.2.2  bouyer 		syscallarg(int) fd;
    486  1.5.2.2  bouyer 		syscallarg(u_long) com;
    487  1.5.2.2  bouyer 		syscallarg(caddr_t) data;
    488  1.5.2.2  bouyer 	} */ *uap = v;
    489  1.5.2.2  bouyer 	struct sys_ioctl_args bia;
    490  1.5.2.2  bouyer 	u_long com;
    491  1.5.2.2  bouyer 
    492  1.5.2.2  bouyer 	SCARG(&bia, fd) = SCARG(uap, fd);
    493  1.5.2.2  bouyer 	SCARG(&bia, data) = SCARG(uap, data);
    494  1.5.2.2  bouyer 	com = SCARG(uap, com);
    495  1.5.2.2  bouyer 
    496  1.5.2.2  bouyer 	switch (com) {
    497  1.5.2.2  bouyer 	default:
    498  1.5.2.2  bouyer 		printf("linux_machdepioctl: invalid ioctl %08lx\n", com);
    499  1.5.2.2  bouyer 		return EINVAL;
    500  1.5.2.2  bouyer 	}
    501  1.5.2.2  bouyer 	SCARG(&bia, com) = com;
    502  1.5.2.2  bouyer 	return sys_ioctl(p, &bia, retval);
    503  1.5.2.2  bouyer }
    504  1.5.2.2  bouyer /*
    505  1.5.2.2  bouyer  * Set I/O permissions for a process. Just set the maximum level
    506  1.5.2.2  bouyer  * right away (ignoring the argument), otherwise we would have
    507  1.5.2.2  bouyer  * to rely on I/O permission maps, which are not implemented.
    508  1.5.2.2  bouyer  */
    509  1.5.2.2  bouyer int
    510  1.5.2.2  bouyer linux_sys_iopl(p, v, retval)
    511  1.5.2.2  bouyer 	struct proc *p;
    512  1.5.2.2  bouyer 	void *v;
    513  1.5.2.2  bouyer 	register_t *retval;
    514  1.5.2.2  bouyer {
    515  1.5.2.2  bouyer 	/*
    516  1.5.2.2  bouyer 	 * This syscall is not implemented in Linux/PowerPC: we should not be here
    517  1.5.2.2  bouyer 	 */
    518  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    519  1.5.2.2  bouyer 	printf("linux_sys_iopl: should not be here.\n");
    520  1.5.2.2  bouyer #endif
    521  1.5.2.2  bouyer 	return 0;
    522  1.5.2.2  bouyer }
    523  1.5.2.2  bouyer 
    524  1.5.2.2  bouyer /*
    525  1.5.2.2  bouyer  * See above. If a root process tries to set access to an I/O port,
    526  1.5.2.2  bouyer  * just let it have the whole range.
    527  1.5.2.2  bouyer  */
    528  1.5.2.2  bouyer int
    529  1.5.2.2  bouyer linux_sys_ioperm(p, v, retval)
    530  1.5.2.2  bouyer 	struct proc *p;
    531  1.5.2.2  bouyer 	void *v;
    532  1.5.2.2  bouyer 	register_t *retval;
    533  1.5.2.2  bouyer {
    534  1.5.2.2  bouyer 	/*
    535  1.5.2.2  bouyer 	 * This syscall is not implemented in Linux/PowerPC: we should not be here
    536  1.5.2.2  bouyer 	 */
    537  1.5.2.2  bouyer #ifdef DEBUG_LINUX
    538  1.5.2.2  bouyer 	printf("linux_sys_ioperm: should not be here.\n");
    539  1.5.2.2  bouyer #endif
    540  1.5.2.2  bouyer 	return 0;
    541  1.5.2.2  bouyer }
    542  1.5.2.2  bouyer 
    543  1.5.2.2  bouyer /*
    544  1.5.2.2  bouyer  * wrapper linux_sys_new_uname() -> linux_sys_uname()
    545  1.5.2.2  bouyer  */
    546  1.5.2.2  bouyer int
    547  1.5.2.2  bouyer linux_sys_new_uname(p, v, retval)
    548  1.5.2.2  bouyer 	struct proc *p;
    549  1.5.2.2  bouyer 	void *v;
    550  1.5.2.2  bouyer 	register_t *retval;
    551  1.5.2.2  bouyer {
    552  1.5.2.2  bouyer 	return linux_sys_uname(p, v, retval);
    553  1.5.2.2  bouyer }
    554  1.5.2.2  bouyer 
    555  1.5.2.2  bouyer /*
    556  1.5.2.2  bouyer  * wrapper linux_sys_new_select() -> linux_sys_select()
    557  1.5.2.2  bouyer  */
    558  1.5.2.2  bouyer int
    559  1.5.2.2  bouyer linux_sys_new_select(p, v, retval)
    560  1.5.2.2  bouyer 	struct proc *p;
    561  1.5.2.2  bouyer 	void *v;
    562  1.5.2.2  bouyer 	register_t *retval;
    563  1.5.2.2  bouyer {
    564  1.5.2.2  bouyer 	return linux_sys_select(p, v, retval);
    565  1.5.2.2  bouyer }
    566