 @@ -1,333 +1,333 @@
 /*
  * CDDL HEADER START
+ *
  * The contents of this file are subject to the terms of the
  * Common Development and Distribution License, Version 1.0 only
  * (the "License").  You may not use this file except in compliance
  * with the License.
+ *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
  * See the License for the specific language governing permissions
  * and limitations under the License.
+ *
  * When distributing Covered Code, include this CDDL HEADER in each
  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  * If applicable, add the following below this CDDL HEADER, with the
  * fields enclosed by brackets "[]" replaced with your own identifying
  * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
  * CDDL HEADER END
+ *
  * $FreeBSD$
+ *
  */
 /*
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dtrace_subr.c,v 1.5 2021/04/06 12:48:36 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dtrace_subr.c,v 1.6 2023/04/17 06:57:02 skrll Exp $");
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/types.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/kmem.h>
 #include <sys/xcall.h>
 #include <sys/cpu.h>
 #include <sys/cpuvar.h>
 #include <sys/dtrace_impl.h>
 #include <sys/dtrace_bsd.h>
 #include <machine/cpu.h>
 #include <machine/frame.h>
 #include <machine/vmparam.h>
 #include <uvm/uvm_pglist.h>
 #include <uvm/uvm_prot.h>
 #include <uvm/uvm_pmap.h>
 #define	CURRENT_CPU	cpu_index(curcpu())
 #define	OFFSET_MASK	((1 << OFFSET_SIZE) - 1)
 extern dtrace_id_t	dtrace_probeid_error;
 extern int (*dtrace_invop_jump_addr)(struct trapframe *);
 extern void dtrace_getnanotime(struct timespec *tsp);
 int dtrace_invop(uintptr_t, struct trapframe *, uintptr_t);
 void dtrace_invop_init(void);
 void dtrace_invop_uninit(void);
 void dtrace_gethrtime_init(void);
 typedef struct dtrace_invop_hdlr {
 	int (*dtih_func)(uintptr_t, struct trapframe *, uintptr_t);
 	struct dtrace_invop_hdlr *dtih_next;
 } dtrace_invop_hdlr_t;
 dtrace_invop_hdlr_t *dtrace_invop_hdlr;
 int
 dtrace_invop(uintptr_t addr, struct trapframe *frame, uintptr_t r0)
+{
 	dtrace_invop_hdlr_t *hdlr;
 	int rval;
 	for (hdlr = dtrace_invop_hdlr; hdlr != NULL; hdlr = hdlr->dtih_next)
 		if ((rval = hdlr->dtih_func(addr, frame, r0)) != 0)
 			return (rval);
 	return (0);
+}
 void
 dtrace_invop_add(int (*func)(uintptr_t, struct trapframe *, uintptr_t))
+{
 	dtrace_invop_hdlr_t *hdlr;
 	hdlr = kmem_alloc(sizeof(*hdlr), KM_SLEEP);
 	hdlr->dtih_func = func;
 	hdlr->dtih_next = dtrace_invop_hdlr;
 	dtrace_invop_hdlr = hdlr;
+}
 void
 dtrace_invop_remove(int (*func)(uintptr_t, struct trapframe *, uintptr_t))
+{
 	dtrace_invop_hdlr_t *hdlr, *prev;
 	hdlr = dtrace_invop_hdlr;
 	prev = NULL;
 	for (;;) {
 		if (hdlr == NULL)
 			panic("attempt to remove non-existent invop handler");
 		if (hdlr->dtih_func == func)
 			break;
 		prev = hdlr;
 		hdlr = hdlr->dtih_next;
+	}
 	if (prev == NULL) {
 		ASSERT(dtrace_invop_hdlr == hdlr);
 		dtrace_invop_hdlr = hdlr->dtih_next;
 	} else {
 		ASSERT(dtrace_invop_hdlr != hdlr);
 		prev->dtih_next = hdlr->dtih_next;
+	}
 	kmem_free(hdlr, sizeof(*hdlr));
+}
 /*ARGSUSED*/
 void
 dtrace_toxic_ranges(void (*func)(uintptr_t base, uintptr_t limit))
+{
 	(*func)(0, (uintptr_t)AARCH64_DIRECTMAP_START);
-	(*func)((uintptr_t)VM_KERNEL_IO_ADDRESS, ~(uintptr_t)0);
+	(*func)((uintptr_t)VM_KERNEL_IO_BASE, ~(uintptr_t)0);
+}
 static void
 xcall_func(void *arg0, void *arg1)
+{
 	dtrace_xcall_t func = arg0;
 	(*func)(arg1);
+}
 void
 dtrace_xcall(processorid_t cpu, dtrace_xcall_t func, void *arg)
+{
 	uint64_t where;
 	if (cpu == DTRACE_CPUALL) {
 		where = xc_broadcast(0, xcall_func, func, arg);
 	} else {
 		struct cpu_info *ci = cpu_lookup(cpu);
 		KASSERT(ci != NULL);
 		where = xc_unicast(0, xcall_func, func, arg, ci);
+	}
 	xc_wait(where);
+}
 static void
 dtrace_sync_func(void)
+{
+}
 void
 dtrace_sync(void)
+{
 	dtrace_xcall(DTRACE_CPUALL, (dtrace_xcall_t)dtrace_sync_func, NULL);
+}
 /*
  * DTrace needs a high resolution time function which can
  * be called from a probe context and guaranteed not to have
  * instrumented with probes itself.
+ *
  * Returns nanoseconds since boot.
  */
 uint64_t
 dtrace_gethrtime()
+{
 	struct timespec curtime;
 	nanouptime(&curtime);
 	return (curtime.tv_sec * 1000000000UL + curtime.tv_nsec);
+}
 void
 dtrace_gethrtime_init(void)
+{
+}
 uint64_t
 dtrace_gethrestime(void)
+{
 	struct timespec current_time;
 	dtrace_getnanotime(&current_time);
 	return (current_time.tv_sec * 1000000000UL + current_time.tv_nsec);
+}
 /* Function to handle DTrace traps during probes. See arm64/arm64/trap.c */
 int
 dtrace_trap(struct trapframe *frame, u_int type)
+{
 	/*
 	 * A trap can occur while DTrace executes a probe. Before
 	 * executing the probe, DTrace blocks re-scheduling and sets
 	 * a flag in its per-cpu flags to indicate that it doesn't
 	 * want to fault. On returning from the probe, the no-fault
 	 * flag is cleared and finally re-scheduling is enabled.
+	 *
 	 * Check if DTrace has enabled 'no-fault' mode:
+	 *
 	 */
 	if ((cpu_core[CURRENT_CPU].cpuc_dtrace_flags & CPU_DTRACE_NOFAULT) != 0) {
 		/*
 		 * There are only a couple of trap types that are expected.
 		 * All the rest will be handled in the usual way.
 		 */
 		switch (type) {
 		case ESR_EC_DATA_ABT_EL1:
 			/* Flag a bad address. */
 			cpu_core[CURRENT_CPU].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
 			cpu_core[CURRENT_CPU].cpuc_dtrace_illval = 0;
 			/*
 			 * Offset the instruction pointer to the instruction
 			 * following the one causing the fault.
 			 */
 			frame->tf_pc += 4;
 			return (1);
 		default:
 			/* Handle all other traps in the usual way. */
 			break;
+		}
+	}
 	/* Handle the trap in the usual way. */
 	return (0);
+}
 void
 dtrace_probe_error(dtrace_state_t *state, dtrace_epid_t epid, int which,
     int fault, int fltoffs, uintptr_t illval)
+{
 	dtrace_probe(dtrace_probeid_error, (uint64_t)(uintptr_t)state,
 	    (uintptr_t)epid,
 	    (uintptr_t)which, (uintptr_t)fault, (uintptr_t)fltoffs);
+}
 static int
 dtrace_invop_start(struct trapframe *frame)
+{
 	int data, invop, reg, update_sp;
 	register_t arg1, arg2;
 	register_t *sp;
 	int offs;
 	int tmp;
 	int i;
 	invop = dtrace_invop(frame->tf_pc, frame, frame->tf_regs.r_reg[0]);
 	tmp = (invop & LDP_STP_MASK);
 	if (tmp == STP_64 || tmp == LDP_64) {
 		sp = (register_t *)frame->tf_sp;
 		data = invop;
 		arg1 = (data >> ARG1_SHIFT) & ARG1_MASK;
 		arg2 = (data >> ARG2_SHIFT) & ARG2_MASK;
 		offs = (data >> OFFSET_SHIFT) & OFFSET_MASK;
 		switch (tmp) {
 		case STP_64:
 			if (offs >> (OFFSET_SIZE - 1))
 				sp -= (~offs & OFFSET_MASK) + 1;
 			else
 				sp += (offs);
 			*(sp + 0) = frame->tf_regs.r_reg[arg1];
 			*(sp + 1) = frame->tf_regs.r_reg[arg2];
 			break;
 		case LDP_64:
 			frame->tf_regs.r_reg[arg1] = *(sp + 0);
 			frame->tf_regs.r_reg[arg2] = *(sp + 1);
 			if (offs >> (OFFSET_SIZE - 1))
 				sp -= (~offs & OFFSET_MASK) + 1;
 			else
 				sp += (offs);
 			break;
 		default:
 			break;
+		}
 		/* Update the stack pointer and program counter to continue */
 		frame->tf_sp = (register_t)sp;
 		frame->tf_pc += INSN_SIZE;
 		return (0);
+	}
 	if ((invop & B_MASK) == B_INSTR) {
 		data = (invop & B_DATA_MASK);
 		/* The data is the number of 4-byte words to change the pc */
 		data *= 4;
 		frame->tf_pc += data;
 		return (0);
+	}
 	if (invop == RET_INSTR) {
 		frame->tf_pc = frame->tf_lr;
 		return (0);
+	}
 	return (-1);
+}
 void
 dtrace_invop_init(void)
+{
 	dtrace_invop_jump_addr = dtrace_invop_start;
+}
 void
 dtrace_invop_uninit(void)
+{
 	dtrace_invop_jump_addr = 0;
+}