fbt.h

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    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  * Portions Copyright 2006-2008 John Birrell jb@freebsd.org
   22  *
   23  * $FreeBSD$
   24  *
   25  */
   26 
   27 /*
   28  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   29  * Use is subject to license terms.
   30  */
   31 
   32 #ifndef _FBT_H_
   33 #define _FBT_H_
   34 
   35 #include "fbt_isa.h"
   36 
   37 /*
   38  * fbt_probe is a bit of a misnomer.  One of these structures is created for
   39  * each trace point of an FBT probe.  A probe might have multiple trace points
   40  * (e.g., a function with multiple return instructions), and different probes
   41  * might have a trace point at the same address (e.g., GNU ifuncs).
   42  */
   43 typedef struct fbt_probe {
   44         struct fbt_probe *fbtp_hashnext;        /* global hash table linkage */
   45         struct fbt_probe *fbtp_tracenext;       /* next probe for tracepoint */
   46         struct fbt_probe *fbtp_probenext;       /* next tracepoint for probe */
   47         int             fbtp_enabled;
   48         fbt_patchval_t  *fbtp_patchpoint;
   49         int8_t          fbtp_rval;
   50         fbt_patchval_t  fbtp_patchval;
   51         fbt_patchval_t  fbtp_savedval;
   52         uintptr_t       fbtp_roffset;
   53         dtrace_id_t     fbtp_id;
   54         const char      *fbtp_name;
   55         modctl_t        *fbtp_ctl;
   56         int             fbtp_loadcnt;
   57         int             fbtp_symindx;
   58 } fbt_probe_t;
   59 
   60 struct linker_file;
   61 struct linker_symval;
   62 struct trapframe;
   63 
   64 int     fbt_invop(uintptr_t, struct trapframe *, uintptr_t);
   65 void    fbt_patch_tracepoint(fbt_probe_t *, fbt_patchval_t);
   66 int     fbt_provide_module_function(struct linker_file *, int,
   67             struct linker_symval *, void *);
   68 int     fbt_excluded(const char *name);
   69 
   70 extern dtrace_provider_id_t     fbt_id;
   71 extern fbt_probe_t              **fbt_probetab;
   72 extern int                      fbt_probetab_mask;
   73 
   74 #define FBT_ADDR2NDX(addr)      ((((uintptr_t)(addr)) >> 4) & fbt_probetab_mask)
   75 #define FBT_PROBETAB_SIZE       0x8000          /* 32k entries -- 128K total */
   76 
   77 #ifdef MALLOC_DECLARE
   78 MALLOC_DECLARE(M_FBT);
   79 #endif
   80 
   81 #endif

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FreeBSD/Linux Kernel Cross Reference sys/cddl/dev/fbt/fbt.h

FreeBSD/Linux Kernel Cross Reference
sys/cddl/dev/fbt/fbt.h