The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/ptrace.h

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    1 /*-
    2  * Copyright (c) 1984, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)ptrace.h    8.2 (Berkeley) 1/4/94
   30  * $FreeBSD: releng/8.4/sys/sys/ptrace.h 218355 2011-02-05 22:57:14Z kib $
   31  */
   32 
   33 #ifndef _SYS_PTRACE_H_
   34 #define _SYS_PTRACE_H_
   35 
   36 #include <sys/signal.h>
   37 #include <sys/param.h>
   38 #include <machine/reg.h>
   39 
   40 #define PT_TRACE_ME     0       /* child declares it's being traced */
   41 #define PT_READ_I       1       /* read word in child's I space */
   42 #define PT_READ_D       2       /* read word in child's D space */
   43 /* was  PT_READ_U       3        * read word in child's user structure */
   44 #define PT_WRITE_I      4       /* write word in child's I space */
   45 #define PT_WRITE_D      5       /* write word in child's D space */
   46 /* was  PT_WRITE_U      6        * write word in child's user structure */
   47 #define PT_CONTINUE     7       /* continue the child */
   48 #define PT_KILL         8       /* kill the child process */
   49 #define PT_STEP         9       /* single step the child */
   50 
   51 #define PT_ATTACH       10      /* trace some running process */
   52 #define PT_DETACH       11      /* stop tracing a process */
   53 #define PT_IO           12      /* do I/O to/from stopped process. */
   54 #define PT_LWPINFO      13      /* Info about the LWP that stopped. */
   55 #define PT_GETNUMLWPS   14      /* get total number of threads */
   56 #define PT_GETLWPLIST   15      /* get thread list */
   57 #define PT_CLEARSTEP    16      /* turn off single step */
   58 #define PT_SETSTEP      17      /* turn on single step */
   59 #define PT_SUSPEND      18      /* suspend a thread */
   60 #define PT_RESUME       19      /* resume a thread */
   61 
   62 #define PT_TO_SCE       20
   63 #define PT_TO_SCX       21
   64 #define PT_SYSCALL      22
   65 
   66 #define PT_FOLLOW_FORK  23
   67 
   68 #define PT_GETREGS      33      /* get general-purpose registers */
   69 #define PT_SETREGS      34      /* set general-purpose registers */
   70 #define PT_GETFPREGS    35      /* get floating-point registers */
   71 #define PT_SETFPREGS    36      /* set floating-point registers */
   72 #define PT_GETDBREGS    37      /* get debugging registers */
   73 #define PT_SETDBREGS    38      /* set debugging registers */
   74 
   75 #define PT_VM_TIMESTAMP 40      /* Get VM version (timestamp) */
   76 #define PT_VM_ENTRY     41      /* Get VM map (entry) */
   77 
   78 #define PT_FIRSTMACH    64      /* for machine-specific requests */
   79 #include <machine/ptrace.h>     /* machine-specific requests, if any */
   80 
   81 struct ptrace_io_desc {
   82         int     piod_op;        /* I/O operation */
   83         void    *piod_offs;     /* child offset */
   84         void    *piod_addr;     /* parent offset */
   85         size_t  piod_len;       /* request length */
   86 };
   87 
   88 /*
   89  * Operations in piod_op.
   90  */
   91 #define PIOD_READ_D     1       /* Read from D space */
   92 #define PIOD_WRITE_D    2       /* Write to D space */
   93 #define PIOD_READ_I     3       /* Read from I space */
   94 #define PIOD_WRITE_I    4       /* Write to I space */
   95 
   96 /* Argument structure for PT_LWPINFO. */
   97 struct ptrace_lwpinfo {
   98         lwpid_t pl_lwpid;       /* LWP described. */
   99         int     pl_event;       /* Event that stopped the LWP. */
  100 #define PL_EVENT_NONE   0
  101 #define PL_EVENT_SIGNAL 1
  102         int     pl_flags;       /* LWP flags. */
  103 #define PL_FLAG_SA      0x01    /* M:N thread */
  104 #define PL_FLAG_BOUND   0x02    /* M:N bound thread */
  105 #define PL_FLAG_SCE     0x04    /* syscall enter point */
  106 #define PL_FLAG_SCX     0x08    /* syscall leave point */
  107 #define PL_FLAG_EXEC    0x10    /* exec(2) succeeded */
  108 #define PL_FLAG_SI      0x20    /* siginfo is valid */
  109 #define PL_FLAG_FORKED  0x40    /* new child */
  110         sigset_t        pl_sigmask;     /* LWP signal mask */
  111         sigset_t        pl_siglist;     /* LWP pending signal */
  112         struct __siginfo pl_siginfo;    /* siginfo for signal */
  113         char            pl_tdname[MAXCOMLEN + 1]; /* LWP name */
  114         int             pl_child_pid;   /* New child pid */
  115 };
  116 
  117 /* Argument structure for PT_VM_ENTRY. */
  118 struct ptrace_vm_entry {
  119         int             pve_entry;      /* Entry number used for iteration. */
  120         int             pve_timestamp;  /* Generation number of VM map. */
  121         u_long          pve_start;      /* Start VA of range. */
  122         u_long          pve_end;        /* End VA of range (incl). */
  123         u_long          pve_offset;     /* Offset in backing object. */
  124         u_int           pve_prot;       /* Protection of memory range. */
  125         u_int           pve_pathlen;    /* Size of path. */
  126         long            pve_fileid;     /* File ID. */
  127         uint32_t        pve_fsid;       /* File system ID. */
  128         char            *pve_path;      /* Path name of object. */
  129 };
  130 
  131 #ifdef _KERNEL
  132 
  133 #define PTRACESTOP_SC(p, td, flag)                              \
  134         if ((p)->p_flag & P_TRACED && (p)->p_stops & (flag)) {  \
  135                 PROC_LOCK(p);                                   \
  136                 ptracestop((td), SIGTRAP);                      \
  137                 PROC_UNLOCK(p);                                 \
  138         }
  139 /*
  140  * The flags below are used for ptrace(2) tracing and have no relation
  141  * to procfs.  They are stored in struct proc's p_stops member.
  142  */
  143 #define S_PT_SCE        0x000010000
  144 #define S_PT_SCX        0x000020000
  145 
  146 int     ptrace_set_pc(struct thread *_td, unsigned long _addr);
  147 int     ptrace_single_step(struct thread *_td);
  148 int     ptrace_clear_single_step(struct thread *_td);
  149 
  150 #ifdef __HAVE_PTRACE_MACHDEP
  151 int     cpu_ptrace(struct thread *_td, int _req, void *_addr, int _data);
  152 #endif
  153 
  154 /*
  155  * These are prototypes for functions that implement some of the
  156  * debugging functionality exported by procfs / linprocfs and by the
  157  * ptrace(2) syscall.  They used to be part of procfs, but they don't
  158  * really belong there.
  159  */
  160 struct reg;
  161 struct fpreg;
  162 struct dbreg;
  163 struct uio;
  164 int     proc_read_regs(struct thread *_td, struct reg *_reg);
  165 int     proc_write_regs(struct thread *_td, struct reg *_reg);
  166 int     proc_read_fpregs(struct thread *_td, struct fpreg *_fpreg);
  167 int     proc_write_fpregs(struct thread *_td, struct fpreg *_fpreg);
  168 int     proc_read_dbregs(struct thread *_td, struct dbreg *_dbreg);
  169 int     proc_write_dbregs(struct thread *_td, struct dbreg *_dbreg);
  170 int     proc_sstep(struct thread *_td);
  171 int     proc_rwmem(struct proc *_p, struct uio *_uio);
  172 #ifdef COMPAT_FREEBSD32
  173 struct reg32;
  174 struct fpreg32;
  175 struct dbreg32;
  176 int     proc_read_regs32(struct thread *_td, struct reg32 *_reg32);
  177 int     proc_write_regs32(struct thread *_td, struct reg32 *_reg32);
  178 int     proc_read_fpregs32(struct thread *_td, struct fpreg32 *_fpreg32);
  179 int     proc_write_fpregs32(struct thread *_td, struct fpreg32 *_fpreg32);
  180 int     proc_read_dbregs32(struct thread *_td, struct dbreg32 *_dbreg32);
  181 int     proc_write_dbregs32(struct thread *_td, struct dbreg32 *_dbreg32);
  182 #endif
  183 #else /* !_KERNEL */
  184 
  185 #include <sys/cdefs.h>
  186 
  187 __BEGIN_DECLS
  188 int     ptrace(int _request, pid_t _pid, caddr_t _addr, int _data);
  189 __END_DECLS
  190 
  191 #endif /* !_KERNEL */
  192 
  193 #endif  /* !_SYS_PTRACE_H_ */

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