b792434150
Move the common kernel function signatures from machine/reg.h to a new sys/reg.h. This is in preperation for adding PT_GETREGSET to ptrace(2). Reviewed by: imp, markj Sponsored by: DARPA, AFRL (original work) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19830
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/*-
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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 Software.Distribution@CS.CMU.EDU
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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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* $FreeBSD$
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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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typedef vm_offset_t db_addr_t; /* address - unsigned */
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typedef long db_expr_t; /* expression - signed */
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#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_rip)
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#define BKPT_INST 0xcc /* breakpoint instruction */
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#define BKPT_SIZE (1) /* size of breakpoint inst */
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#define BKPT_SET(inst) (BKPT_INST)
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#define BKPT_SKIP \
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do { \
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kdb_frame->tf_rip += 1; \
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kdb_thrctx->pcb_rip += 1; \
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} while(0)
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#define FIXUP_PC_AFTER_BREAK \
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do { \
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kdb_frame->tf_rip -= 1; \
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kdb_thrctx->pcb_rip -= 1; \
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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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/*
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* The debug exception type is copied from %dr6 to 'code' and used to
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* disambiguate single step traps. Watchpoints have no special support.
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* Our hardware breakpoints are not well integrated with ddb and are too
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* different from watchpoints. ddb treats them as unknown traps with
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* unknown addresses and doesn't turn them off while it is running.
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*/
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#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
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#define IS_SSTEP_TRAP(type, code) \
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((type) == T_TRCTRAP && (code) & DBREG_DR6_BS)
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#define IS_WATCHPOINT_TRAP(type, code) 0
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#define I_CALL 0xe8
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#define I_CALLI 0xff
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#define i_calli(ins) (((ins)&0xff) == I_CALLI && ((ins)&0x3800) == 0x1000)
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#define I_RET 0xc3
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#define I_IRET 0xcf
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#define i_rex(ins) (((ins) & 0xff) == 0x41 || ((ins) & 0xff) == 0x43)
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#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
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#define inst_return(ins) (((ins)&0xff) == I_RET)
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#define inst_call(ins) (((ins)&0xff) == I_CALL || i_calli(ins) || \
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(i_calli((ins) >> 8) && i_rex(ins)))
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#define inst_load(ins) 0
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#define inst_store(ins) 0
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#endif /* !_MACHINE_DB_MACHDEP_H_ */
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