bsd/dev/ppc/sdt_ppc.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /* #pragma ident        "@(#)sdt.c      1.6     06/03/24 SMI" */
  27
  28 #ifdef KERNEL
  29 #ifndef _KERNEL
  30 #define _KERNEL /* Solaris vs. Darwin */
  31 #endif
  32 #endif
  33
  34 #define MACH__POSIX_C_SOURCE_PRIVATE 1 /* pulls in suitable savearea from mach/ppc/thread_status.h */
  35 #include <kern/cpu_data.h>
  36 #include <kern/thread.h>
  37 #include <mach/thread_status.h>
  38
  39 #include <sys/dtrace.h>
  40 #include <sys/dtrace_impl.h>
  41
  42 #include <sys/dtrace_glue.h>
  43
  44 #include <sys/sdt_impl.h>
  45 #include <machine/cpu_capabilities.h>
  46
  47 extern sdt_probe_t      **sdt_probetab;
  48
  49 /*ARGSUSED*/
  50 int
  51 sdt_invop(uintptr_t addr, uintptr_t *stack, uintptr_t eax)
  52 {
  53     uint64_t mask = (_cpu_capabilities & k64Bit) ? 0xffffffffffffffffULL : 0x00000000ffffffffULL;
  54
  55 #pragma unused(eax)
  56         sdt_probe_t *sdt = sdt_probetab[SDT_ADDR2NDX(addr)];
  57
  58         for (; sdt != NULL; sdt = sdt->sdp_hashnext) {
  59                 if ((uintptr_t)sdt->sdp_patchpoint == addr) {
  60                         ppc_saved_state_t *regs = (ppc_saved_state_t *)stack;
  61
  62             dtrace_probe(sdt->sdp_id, regs->save_r3 & mask, regs->save_r4 & mask,
  63                 regs->save_r5 & mask, regs->save_r6 & mask, regs->save_r7 & mask);
  64
  65                         return (DTRACE_INVOP_NOP);
  66                 }
  67         }
  68
  69         return (0);
  70 }
  71