def46d58a6
not sure yet about 5.x... MFC if needed. Also fixes small problems with examining some registers and some specific gdb transfer problems. As the patch says: This is not a pretty patch and only meant as a temporary fix until a better solution is committed. PR: i386/71715 Submitted by: Stephan Uphoff <ups@tree.com> MFC after: 1 week
95 lines
3.0 KiB
C
95 lines
3.0 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 int db_expr_t; /* expression - signed */
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#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_eip)
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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_eip += 1; \
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kdb_thrctx->pcb_eip += 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_eip -= 1; \
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kdb_thrctx->pcb_eip -= 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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#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
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/*
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* Watchpoints are not supported. The debug exception type is in %dr6
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* and not yet in the args to this macro.
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*/
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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_RET 0xc3
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#define I_IRET 0xcf
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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 || \
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(((ins)&0xff) == I_CALLI && \
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((ins)&0x3800) == 0x1000))
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#define inst_load(ins) 0
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#define inst_store(ins) 0
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/*
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* There no interesting addresses below _kstack = 0xefbfe000. There
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* are small absolute values for GUPROF, but we don't want to see them.
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* Treat "negative" addresses below _kstack as non-small to allow for
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* future reductions of _kstack and to avoid sign extension problems.
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*
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* There is one interesting symbol above -db_maxoff = 0xffff0000,
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* namely _APTD = 0xfffff000. Accepting this would mess up the
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* printing of small negative offsets. The next largest symbol is
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* _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is
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* set to >= 0x400000 - (max stack offset)).
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*/
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#define DB_SMALL_VALUE_MAX 0x7fffffff
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#define DB_SMALL_VALUE_MIN (-0x400001)
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#endif /* !_MACHINE_DB_MACHDEP_H_ */
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