241cf91ddc
Add new ptrace(2) calls:
- PT_COUNT_WATCHPOINTS - count the number of available hardware watchpoints
- PT_READ_WATCHPOINT - read struct ptrace_watchpoint from the kernel state
- PT_WRITE_WATCHPOINT - write new struct ptrace_watchpoint state, this
includes enabling and disabling watchpoints
The ptrace_watchpoint structure contains MI and MD parts:
typedef struct ptrace_watchpoint {
int pw_index; /* HW Watchpoint ID (count from 0) */
lwpid_t pw_lwpid; /* LWP described */
struct mdpw pw_md; /* MD fields */
} ptrace_watchpoint_t;
For example amd64 defines MD as follows:
struct mdpw {
void *md_address;
int md_condition;
int md_length;
};
These calls are protected with the __HAVE_PTRACE_WATCHPOINTS guard.
Tested on amd64, initial support added for i386 and XEN.
Sponsored by <The NetBSD Foundation>
194 lines
6.5 KiB
C
194 lines
6.5 KiB
C
/* $NetBSD: ptrace.h,v 1.16 2016/12/15 12:04:18 kamil Exp $ */
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/*
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* Copyright (c) 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1993 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_PTRACE_H_
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#define _I386_PTRACE_H_
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/*
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* i386-dependent ptrace definitions
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*/
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#define PT_STEP (PT_FIRSTMACH + 0)
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#define PT_GETREGS (PT_FIRSTMACH + 1)
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#define PT_SETREGS (PT_FIRSTMACH + 2)
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#define PT_GETFPREGS (PT_FIRSTMACH + 3)
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#define PT_SETFPREGS (PT_FIRSTMACH + 4)
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/* We have machine-dependent process tracing needs. */
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#define __HAVE_PTRACE_MACHDEP
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/* We have machine-dependent procfs nodes. */
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#define __HAVE_PROCFS_MACHDEP
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/* The machine-dependent ptrace(2) requests. */
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#define PT_GETXMMREGS (PT_FIRSTMACH + 5)
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#define PT_SETXMMREGS (PT_FIRSTMACH + 6)
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#define PT_READ_WATCHPOINT (PT_FIRSTMACH + 7)
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#define PT_WRITE_WATCHPOINT (PT_FIRSTMACH + 8)
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#define PT_COUNT_WATCHPOINTS (PT_FIRSTMACH + 9)
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#define PT_MACHDEP_STRINGS \
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"PT_STEP", \
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"PT_GETREGS", \
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"PT_SETREGS", \
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"PT_GETFPREGS", \
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"PT_SETFPREGS", \
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"PT_GETXMMREGS", \
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"PT_SETXMMREGS", \
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"PT_READ_WATCHPOINT", \
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"PT_WRITE_WATCHPOINT", \
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"PT_COUNT_WATCHPOINTS"
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#include <machine/reg.h>
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#define PTRACE_REG_PC(r) (r)->r_eip
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#define PTRACE_REG_SET_PC(r, v) (r)->r_eip = (v)
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#define PTRACE_REG_SP(r) (r)->r_esp
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#define PTRACE_REG_INTRV(r) (r)->r_eax
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#define PTRACE_BREAKPOINT ((const uint8_t[]) { 0xcc })
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#define PTRACE_BREAKPOINT_SIZE 1
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#define PTRACE_BREAKPOINT_ADJ sizeof(PTRACE_BREAKPOINT)
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#define __HAVE_PTRACE_WATCHPOINTS
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/*
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* This MD structure translates into x86_hw_watchpoint
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*
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* pw_address - 0 represents disabled hardware watchpoint
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*
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* conditions:
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* 0b00 - execution
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* 0b01 - data write
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* 0b10 - io read/write (not implemented)
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* 0b11 - data read/write
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*
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* length:
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* 0b00 - 1 byte
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* 0b01 - 2 bytes
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* 0b10 - undefined
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* 0b11 - 4 bytes
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*
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* Helper symbols for conditions and length are available in <x86/dbregs.h>
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*
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*/
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struct mdpw {
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void *md_address;
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int md_condition;
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int md_length;
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};
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#ifdef _KERNEL
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/*
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* These are used in sys_ptrace() to find good ptrace(2) requests.
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*/
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#define PTRACE_MACHDEP_REQUEST_CASES \
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case PT_GETXMMREGS: \
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case PT_SETXMMREGS:
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/*
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* These are used to define machine-dependent procfs node types.
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*/
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#define PROCFS_MACHDEP_NODE_TYPES \
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Pmachdep_xmmregs, /* extended FP register set */
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/*
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* These are used in switch statements to catch machine-dependent
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* procfs node types.
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*/
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#define PROCFS_MACHDEP_NODETYPE_CASES \
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case Pmachdep_xmmregs:
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/*
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* These are used to protect a privileged process's state.
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*/
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#define PROCFS_MACHDEP_PROTECT_CASES \
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case Pmachdep_xmmregs:
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/*
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* These are used to define the machine-dependent procfs nodes.
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*/
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#define PROCFS_MACHDEP_NODETYPE_DEFNS \
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{ DT_REG, N("xmmregs"), Pmachdep_xmmregs, \
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procfs_machdep_validxmmregs },
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struct xmmregs;
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/* Functions used by both ptrace(2) and procfs. */
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int process_machdep_doxmmregs(struct lwp *, struct lwp *, struct uio *);
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int process_machdep_validxmmregs(struct proc *);
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/* Functions used by procfs. */
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struct mount;
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struct pfsnode;
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int procfs_machdep_doxmmregs(struct lwp *, struct lwp *,
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struct pfsnode *, struct uio *);
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int procfs_machdep_validxmmregs(struct lwp *, struct mount *);
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#endif /* _KERNEL */
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#endif /* _I386_PTRACE_H_ */
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