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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/arm/include/db_machdep.h
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/*-

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 * Mach Operating System

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 * Copyright (c) 1991,1990 Carnegie Mellon University

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 * All Rights Reserved.

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 *

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 * Permission to use, copy, modify and distribute this software and its

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 * documentation is hereby granted, provided that both the copyright

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 * notice and this permission notice appear in all copies of the

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 * software, derivative works or modified versions, and any portions

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 * thereof, and that both notices appear in supporting documentation.

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 *

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 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"

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 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR

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 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.

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 *

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 * Carnegie Mellon requests users of this software to return to

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 *

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 *  Software Distribution Coordinator  or  [email protected]

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 *  School of Computer Science

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 *  Carnegie Mellon University

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 *  Pittsburgh PA 15213-3890

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 *

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 * any improvements or extensions that they make and grant Carnegie Mellon

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 * the rights to redistribute these changes.

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 *

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 *	from: FreeBSD: src/sys/i386/include/db_machdep.h,v 1.16 1999/10/04

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 */

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#ifndef	_MACHINE_DB_MACHDEP_H_

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#define	_MACHINE_DB_MACHDEP_H_

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#include <machine/frame.h>

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#include <machine/trap.h>

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#include <machine/armreg.h>

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#define T_BREAKPOINT	(1)

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#define T_WATCHPOINT	(2)

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typedef vm_offset_t	db_addr_t;

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typedef int		db_expr_t;

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#define	PC_REGS()	((db_addr_t)kdb_thrctx->pcb_regs.sf_pc)

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#define	BKPT_INST	(KERNEL_BREAKPOINT)

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#define	BKPT_SIZE	(INSN_SIZE)

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#define	BKPT_SET(inst)	(BKPT_INST)

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#define	BKPT_SKIP do {							\

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	kdb_frame->tf_pc += BKPT_SIZE; \

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} while (0)

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#define	db_clear_single_step	kdb_cpu_clear_singlestep

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#define	db_set_single_step	kdb_cpu_set_singlestep

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#define	db_pc_is_singlestep	kdb_cpu_pc_is_singlestep

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#define	IS_BREAKPOINT_TRAP(type, code)	(type == T_BREAKPOINT)

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#define	IS_WATCHPOINT_TRAP(type, code)	(type == T_WATCHPOINT)

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#define	inst_trap_return(ins)	(0)

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/* ldmxx reg, {..., pc}

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					    01800000  stack mode

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					    000f0000  register

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					    0000ffff  register list */

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/* mov pc, reg

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					    0000000f  register */

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#define	inst_return(ins)	(((ins) & 0x0e108000) == 0x08108000 || \

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				 ((ins) & 0x0ff0fff0) == 0x01a0f000 ||	\

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				 ((ins) & 0x0ffffff0) == 0x012fff10) /* bx */

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/* bl ...

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					    00ffffff  offset>>2 */

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#define	inst_call(ins)		(((ins) & 0x0f000000) == 0x0b000000)

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/* b ...

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					    00ffffff  offset>>2 */

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/* ldr pc, [pc, reg, lsl #2]

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					    0000000f  register */

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#define	inst_branch(ins)	(((ins) & 0x0f000000) == 0x0a000000 || \

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				 ((ins) & 0x0fdffff0) == 0x079ff100 || \

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				 ((ins) & 0x0cd0f000) == 0x0490f000 || \

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				 ((ins) & 0x0ffffff0) == 0x012fff30 || /* blx */ \

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				 ((ins) & 0x0de0f000) == 0x0080f000)

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#define	inst_load(ins)		(0)

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#define	inst_store(ins)		(0)

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#define next_instr_address(pc, bd)	((bd) ? (pc) : ((pc) + INSN_SIZE))

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#define	DB_ELFSIZE		32

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int db_validate_address(vm_offset_t);

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u_int branch_taken (u_int insn, db_addr_t pc);

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#endif /* !_MACHINE_DB_MACHDEP_H_ */

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