FreeBSD/Linux Kernel Cross Reference
sys/cddl/contrib/opensolaris/uts/common/sys/fasttrap.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (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
     */
    
    /*
     * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    
    #ifndef _SYS_FASTTRAP_H
    #define _SYS_FASTTRAP_H
    
    #pragma ident   "%Z%%M% %I%     %E% SMI"
    
    #include <sys/fasttrap_isa.h>
    #include <sys/dtrace.h>
    #include <sys/types.h>
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    #ifdef illumos
    #define FASTTRAPIOC             (('m' << 24) | ('r' << 16) | ('f' << 8))
    #define FASTTRAPIOC_MAKEPROBE   (FASTTRAPIOC | 1)
    #define FASTTRAPIOC_GETINSTR    (FASTTRAPIOC | 2)
    #else
    #define FASTTRAPIOC_GETINSTR    _IO('f', 2)
    #define FASTTRAPIOC_MAKEPROBE   _IO('f', 3)
    #endif
    
    typedef enum fasttrap_probe_type {
            DTFTP_NONE = 0,
            DTFTP_ENTRY,
            DTFTP_RETURN,
            DTFTP_OFFSETS,
            DTFTP_POST_OFFSETS,
            DTFTP_IS_ENABLED
    } fasttrap_probe_type_t;
    
    typedef struct fasttrap_probe_spec {
            pid_t                   ftps_pid;
            fasttrap_probe_type_t   ftps_type;
    
            char                    ftps_func[DTRACE_FUNCNAMELEN];
            char                    ftps_mod[DTRACE_MODNAMELEN];
    
            uint64_t                ftps_pc;
            uint64_t                ftps_size;
            uint64_t                ftps_noffs;
            uint64_t                ftps_offs[1];
    } fasttrap_probe_spec_t;
    
    typedef struct fasttrap_instr_query {
            uint64_t                ftiq_pc;
            pid_t                   ftiq_pid;
            fasttrap_instr_t        ftiq_instr;
    } fasttrap_instr_query_t;
    
    /*
     * To support the fasttrap provider from very early in a process's life,
     * the run-time linker, ld.so.1, has a program header of type PT_SUNWDTRACE
     * which points to a data object which must be PT_SUNWDTRACE_SIZE bytes.
     * This structure mimics the fasttrap provider section of the ulwp_t structure.
     * When the fasttrap provider is changed to require new or different
     * instructions, the data object in ld.so.1 and the thread initializers in libc
     * (libc_init() and _thrp_create()) need to be updated to include the new
     * instructions, and PT_SUNWDTRACE needs to be changed to a new unique number
     * (while the old value gets assigned something like PT_SUNWDTRACE_1). Since the
     * linker must be backward compatible with old Solaris releases, it must have
     * program headers for each of the PT_SUNWDTRACE versions. The kernel's
     * elfexec() function only has to look for the latest version of the
     * PT_SUNWDTRACE program header.
     */
    #define PT_SUNWDTRACE_SIZE      FASTTRAP_SUNWDTRACE_SIZE
    
    #ifdef  __cplusplus
    }
    #endif
    
    #endif  /* _SYS_FASTTRAP_H */

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