/* $NetBSD: db_machdep.h,v 1.11.2.1 2021/04/03 22:28:13 thorpej Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*-
* Copyright (c) 2014 Andrew Turner
* Copyright (c) 2014-2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under
* sponsorship from the FreeBSD Foundation.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD: head/sys/arm64/include/db_machdep.h 316001 2017-03-26 18:46:35Z bde $
*/
#ifndef _AARCH64_DB_MACHDEP_H_
#define _AARCH64_DB_MACHDEP_H_
#ifdef __aarch64__
#include <sys/types.h>
#include <aarch64/frame.h>
#include <ddb/db_user.h>
typedef long long int db_expr_t;
#define DDB_EXPR_FMT "ll"
typedef uintptr_t db_addr_t;
#define BKPT_ADDR(addr) (addr)
#define BKPT_SIZE 4
#ifdef __AARCH64EB__
#define BKPT_INSN 0x000020d4 /* brk #0 */
#else
#define BKPT_INSN 0xd4200000 /* brk #0 */
#endif
#define BKPT_SET(insn, addr) (BKPT_INSN)
typedef struct trapframe db_regs_t;
extern db_regs_t ddb_regs;
#define DDB_REGS (&ddb_regs)
#define PC_REGS(tf) ((tf)->tf_pc)
int kdb_trap(int, struct trapframe *);
#define DB_TRAP_UNKNOWN 0
#define DB_TRAP_BREAKPOINT 1
#define DB_TRAP_BKPT_INSN 2
#define DB_TRAP_WATCHPOINT 3
#define DB_TRAP_SW_STEP 4
#define IS_BREAKPOINT_TRAP(type, code) \
((type) == DB_TRAP_BKPT_INSN)
#define IS_WATCHPOINT_TRAP(type, code) \
((type) == DB_TRAP_BREAKPOINT || (type) == DB_TRAP_WATCHPOINT)
static inline bool
inst_return(db_expr_t insn)
{
LE32TOH(insn);
return ((insn & 0xfffffc1f) == 0xd65f0000); /* ret xN */
}
static inline bool
inst_trap_return(db_expr_t insn)
{
LE32TOH(insn);
return insn == 0xd69f03e0; /* eret */
}
static inline bool
inst_call(db_expr_t insn)
{
LE32TOH(insn);
return ((insn & 0xfc000000) == 0x94000000) /* bl */
|| ((insn & 0xfffffc1f) == 0xd63f0000); /* blr */
}
static inline bool
inst_load(db_expr_t insn)
{
LE32TOH(insn);
return
((insn & 0xffe00c00) == 0xb8800000) || /* ldursw */
/* ldrsw imm{pre,post}idx */
((insn & 0xffe00400) == 0xb8800400) ||
((insn & 0xffc00c00) == 0xb8800800) || /* ldrsw reg,ldtrsw */
((insn & 0xffc00000) == 0xb9800000) || /* ldrsw immunsign */
((insn & 0xffc00000) == 0x39400000) || /* ldrb immunsign */
((insn & 0xff000000) == 0x98000000) || /* ldrsw literal */
/* ldpsw {pre,post}idx */
((insn & 0xfec00000) == 0x68c00000) ||
/* ldrh immunsign,ldpsw signed */
((insn & 0xefc00000) == 0x69400000) ||
((insn & 0xbfff0000) == 0x887f0000) || /* ldaxp,ldxp */
((insn & 0xbfc00000) == 0xb9400000) || /* ldr immunsign */
((insn & 0xbfa00c00) == 0x38800000) || /* ldursh,ldursb */
/* ldrsh imm{pre,post}idx,ldrsb imm{pre,post}idx */
((insn & 0xbfa00400) == 0x38800400) ||
/* ldrs[bh] reg,ldtrs[bh] */
((insn & 0xbf800c00) == 0x38800800) ||
/* ldrsh immunsign,ldrsb immunsign */
((insn & 0xbf800000) == 0x39800000) ||
((insn & 0xbf000000) == 0x18000000) || /* ldr literal */
/* ldp {pre,post}idx,ldp signed,ldnp */
((insn & 0x7e400000) == 0x28400000) ||
((insn & 0x3ffffc00) == 0x085f7c00) || /* ldxr,ldxr[bh] */
((insn & 0x3fe00c00) == 0x38400000) || /* ldur,ldur[bh] */
/* ldr imm{pre,post}idx,ldr[bh]_imm{pre,post}idx */
((insn & 0x3fe00400) == 0x38400400) ||
/* ldtr,ldtr[bh],ldr_reg,ldr[bh]_reg */
((insn & 0x3fc00c00) == 0x38400800) ||
/* ldaxr,ldaxr[bh],ldar,ldar[bh] */
((insn & 0x3f7ffc00) == 0x085ffc00);
}
static inline bool
inst_store(db_expr_t insn)
{
LE32TOH(insn);
return
((insn & 0xbfe00000) == 0x88200000) || /* stlxp,stxp */
/* stp {pre,post}idx,stp signed,stnp */
((insn & 0x7e400000) == 0x28000000) ||
((insn & 0x3ffffc00) == 0x089ffc00) || /* stlr,stlr[bh] */
/* stlxr,stlxr[bh],stxr,stxr[bh] */
((insn & 0x3fe07c00) == 0x08007c00) ||
((insn & 0x3fe00c00) == 0x38000000) || /* stur,stur[bh] */
/* str imm{pre,post}idx,str[bh] imm{pre,post}idx */
((insn & 0x3fe00400) == 0x38000400) ||
/* str reg,str[bh] reg,sttr,sttr[bh] */
((insn & 0x3fc00c00) == 0x38000800) ||
/* str immunsign,str[bh] immunsign */
((insn & 0x3fc00000) == 0x39000000);
}
#define SOFTWARE_SSTEP
#ifdef SOFTWARE_SSTEP
static inline bool
inst_branch(db_expr_t insn)
{
LE32TOH(insn);
return
((insn & 0xff000010) == 0x54000000) || /* b.cond */
((insn & 0xfc000000) == 0x14000000) || /* b imm */
((insn & 0xfffffc1f) == 0xd61f0000) || /* br */
((insn & 0x7f000000) == 0x35000000) || /* cbnz */
((insn & 0x7f000000) == 0x34000000) || /* cbz */
((insn & 0x7f000000) == 0x37000000) || /* tbnz */
((insn & 0x7f000000) == 0x36000000); /* tbz */
}
bool db_inst_unconditional_flow_transfer(db_expr_t);
db_addr_t db_branch_taken(db_expr_t, db_addr_t, db_regs_t *);
#define next_instr_address(pc, bd) \
((bd) ? (pc) : ((pc) + 4))
#define branch_taken(ins, pc, regs) \
db_branch_taken((ins), (pc), (regs))
#define inst_unconditional_flow_transfer(ins) \
db_inst_unconditional_flow_transfer(ins)
#endif /* SOFTWARE_SSTEP */
#define DB_MACHINE_COMMANDS
void dump_trapframe(struct trapframe *, void (*)(const char *, ...));
void dump_switchframe(struct trapframe *, void (*)(const char *, ...));
const char *strdisasm(vaddr_t, uint64_t);
void db_machdep_init(void);
/* hardware breakpoint/watchpoint functions */
void aarch64_breakpoint_set(int, vaddr_t);
void aarch64_watchpoint_set(int, vaddr_t, u_int, u_int);
#define WATCHPOINT_ACCESS_LOAD 0x01
#define WATCHPOINT_ACCESS_STORE 0x02
#define WATCHPOINT_ACCESS_LOADSTORE 0x03
#define WATCHPOINT_ACCESS_MASK 0x03
#define DB_ELF_SYMBOLS
#elif defined(__arm__)
#include <arm/db_machdep.h>
#endif
#endif /* _AARCH64_DB_MACHDEP_H_ */
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