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      1 /*	$NetBSD: linux_sys_machdep.c,v 1.15 2018/01/24 09:04:45 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 Ben Harris
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/param.h>
     31 
     32 __KERNEL_RCSID(0, "$NetBSD: linux_sys_machdep.c,v 1.15 2018/01/24 09:04:45 skrll Exp $");
     33 
     34 #include <sys/systm.h>
     35 #include <sys/signalvar.h>
     36 #include <sys/lwp.h>
     37 #include <sys/cpu.h>
     38 
     39 #include <compat/linux/common/linux_types.h>
     40 #include <compat/linux/common/linux_signal.h>
     41 #include <compat/linux/common/linux_siginfo.h>
     42 #include <compat/linux/common/linux_machdep.h>
     43 #include <compat/linux/linux_syscallargs.h>
     44 
     45 #include <arm/cpufunc.h>
     46 
     47 int
     48 linux_sys_breakpoint(struct lwp *l, const void *v, register_t *retval)
     49 {
     50 	ksiginfo_t ksi;
     51 
     52 	KSI_INIT_TRAP(&ksi);
     53 	ksi.ksi_signo = SIGTRAP;
     54 	ksi.ksi_code = TRAP_BRKPT;
     55 	trapsignal(l, &ksi);
     56 	return ERESTART; /* Leave PC pointing back at the breakpoint. */
     57 }
     58 
     59 int
     60 linux_sys_cacheflush(struct lwp *l, const struct linux_sys_cacheflush_args *uap, register_t *retval)
     61 {
     62 	/* {
     63 		syscallarg(uintptr_t) from;
     64 		syscallarg(uintptr_t) to;
     65 		syscallarg(int) flags;
     66 	} */
     67 
     68 	cpu_icache_sync_range(SCARG(uap, from),
     69 	    SCARG(uap, to) - SCARG(uap, from) + 1);
     70 	*retval = 0;
     71 	return 0;
     72 }
     73 
     74 int
     75 linux_sys_set_tls(struct lwp *l, const struct linux_sys_set_tls_args *uap, register_t *retval)
     76 {
     77 
     78 	return lwp_setprivate(l, SCARG(uap, tls));
     79 }
     80