xref: /src/sys/arch/amd64/include/ptrace.h

/*	$NetBSD: ptrace.h,v 1.23 2023/11/20 03:05:48 simonb Exp $	*/

/*
 * Copyright (c) 1993 Christopher G. Demetriou
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _AMD64_PTRACE_H_
#define _AMD64_PTRACE_H_

#ifdef __x86_64__
/*
 * amd64-dependent ptrace definitions
 */
#define	PT_STEP			(PT_FIRSTMACH + 0)
#define	PT_GETREGS		(PT_FIRSTMACH + 1)
#define	PT_SETREGS		(PT_FIRSTMACH + 2)
#define	PT_GETFPREGS		(PT_FIRSTMACH + 3)
#define	PT_SETFPREGS		(PT_FIRSTMACH + 4)
#define	PT_GETDBREGS		(PT_FIRSTMACH + 5)
#define	PT_SETDBREGS		(PT_FIRSTMACH + 6)
#define	PT_SETSTEP		(PT_FIRSTMACH + 7)
#define	PT_CLEARSTEP		(PT_FIRSTMACH + 8)
#define	PT_GETXSTATE		(PT_FIRSTMACH + 9)
#define	PT_SETXSTATE		(PT_FIRSTMACH + 10)
#ifdef _KERNEL
/*
 * Only used internally for COMPAT_NETBSD32
 */
#define	PT_GETXMMREGS		(PT_FIRSTMACH + 11)
#define	PT_SETXMMREGS		(PT_FIRSTMACH + 12)
#endif

/* We have machine-dependent process tracing needs. */
#define	__HAVE_PTRACE_MACHDEP

#define PT_MACHDEP_STRINGS \
	"PT_STEP", \
	"PT_GETREGS", \
	"PT_SETREGS", \
	"PT_GETFPREGS", \
	"PT_SETFPREGS", \
	"PT_GETDBREGS", \
	"PT_SETDBREGS", \
	"PT_SETSTEP", \
	"PT_CLEARSTEP", \
	"PT_GETXSTATE", \
	"PT_SETXSTATE", \
	"PT_GETXMMREGS", \
	"PT_SETXMMREGS"

#include <machine/reg.h>
#define PTRACE_REG_PC(r)	(r)->regs[_REG_RIP]
#define PTRACE_REG_FP(r)	(r)->regs[_REG_RBP]
#define PTRACE_REG_SET_PC(r, v)	(r)->regs[_REG_RIP] = (v)
#define PTRACE_REG_SP(r)	(r)->regs[_REG_RSP]
#define PTRACE_REG_INTRV(r)	(r)->regs[_REG_RAX]

#define PTRACE_ILLEGAL_ASM	__asm __volatile ("ud2" : : : "memory")

#define PTRACE_BREAKPOINT	((const uint8_t[]) { 0xcc })
#define PTRACE_BREAKPOINT_ASM	__asm __volatile ("int3" : : : "memory")
#define PTRACE_BREAKPOINT_SIZE	1
#define PTRACE_BREAKPOINT_ADJ	1

#ifdef _KERNEL

/*
 * These are used in sys_ptrace() to find good ptrace(2) requests.
 */
#define	PTRACE_MACHDEP_REQUEST_CASES					\
	case PT_GETXSTATE:						\
	case PT_SETXSTATE:						\
	case PT_GETXMMREGS:						\
	case PT_SETXMMREGS:

int process_machdep_doxstate(struct lwp *, struct lwp *, struct uio *);
int process_machdep_validfpu(struct proc *);

/*
 * The fpregs structure contains an fxsave area, which must have 16-byte
 * alignment.
 */
#define PTRACE_REGS_ALIGN __aligned(16)

#include <sys/module_hook.h>
MODULE_HOOK(netbsd32_process_doxmmregs_hook, int,
    (struct lwp *, struct lwp *, void *, bool));

#ifdef EXEC_ELF32
#include <machine/netbsd32_machdep.h>
#endif
#define PT64_GETXSTATE		PT_GETXSTATE
#define COREDUMP_MACHDEP_LWP_NOTES(l, ns, name)				\
{									\
	struct xstate xstate;	/* XXX FIXME big stack object */	\
	memset(&xstate, 0, sizeof(xstate));				\
	if (!process_read_xstate(l, &xstate))				\
	{								\
		ELFNAMEEND(coredump_savenote)(ns,			\
		    CONCAT(CONCAT(PT, ELFSIZE), _GETXSTATE), name,	\
		    &xstate, sizeof(xstate));				\
	}								\
}

#endif /* _KERNEL */

#ifdef _KERNEL_OPT
#include "opt_compat_netbsd32.h"

#ifdef COMPAT_NETBSD32
#include <machine/netbsd32_machdep.h>

#define process_read_regs32	netbsd32_process_read_regs
#define process_read_fpregs32	netbsd32_process_read_fpregs
#define process_read_dbregs32	netbsd32_process_read_dbregs

#define process_write_regs32	netbsd32_process_write_regs
#define process_write_fpregs32	netbsd32_process_write_fpregs
#define process_write_dbregs32	netbsd32_process_write_dbregs

#define process_reg32		struct reg32
#define process_fpreg32		struct fpreg32
#define process_dbreg32		struct dbreg32

#define PTRACE_TRANSLATE_REQUEST32(x) netbsd32_ptrace_translate_request(x)
#endif	/* COMPAT_NETBSD32 */
#endif	/* _KERNEL_OPT */

#else	/* !__x86_64__ */

#include <i386/ptrace.h>

#endif	/* __x86_64__ */

#endif	/* _AMD64_PTRACE_H_ */