f434f3515b
I fixed this in 1997, but the fix was over-engineered and fragile and was broken in 2003 if not before. i386 parameters were copied to 8 other arches verbatim, mostly after they stopped working on i386, and mostly without the large comment saying how the values were chosen on i386. powerpc has a non-verbatim copy which just changes the uncritical parameter and seems to add a sign extension bug to it. Just treat negative offsets as offsets if they are no more negative than -db_offset_max (default -64K), and remove all the broken parameters. -64K is not very negative, but it is enough for frame and stack pointer offsets since kernel stacks are small. The over-engineering was mainly to go more negative than -64K for the negative offset format, without affecting printing for more than a single address. Addresses in the top 64K of a (full 32-bit or 64-bit) address space are now printed less well, but there aren't many interesting ones. For arches that have many interesting ones very near the top (e.g., 68k has interrupt vectors there), there would be no good limit for the negative offset format and -64K is a good as anything.
96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
/* $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998 Per Fogelstrom, Opsycon AB
|
|
*
|
|
* 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 under OpenBSD by
|
|
* Per Fogelstrom, Opsycon AB, Sweden.
|
|
* 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.
|
|
*
|
|
* JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MIPS_DB_MACHDEP_H_
|
|
#define _MIPS_DB_MACHDEP_H_
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/trap.h>
|
|
#include <machine/endian.h>
|
|
|
|
typedef struct trapframe db_regs_t;
|
|
extern db_regs_t ddb_regs; /* register state */
|
|
|
|
typedef vm_offset_t db_addr_t; /* address - unsigned */
|
|
typedef register_t db_expr_t; /* expression - signed */
|
|
|
|
#if BYTE_ORDER == _BIG_ENDIAN
|
|
#define BYTE_MSF (1)
|
|
#endif
|
|
|
|
#define SOFTWARE_SSTEP /* Need software single step */
|
|
#define SOFTWARE_SSTEP_EMUL /* next_instr_address() emulates 100% */
|
|
db_addr_t next_instr_address(db_addr_t, boolean_t);
|
|
#define BKPT_SIZE (4)
|
|
#define BKPT_SET(ins) (MIPS_BREAK_DDB)
|
|
#define DB_VALID_BREAKPOINT(addr) (((addr) & 3) == 0)
|
|
|
|
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK)
|
|
#define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
|
|
|
|
#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_regs.pc)
|
|
#define BKPT_SKIP \
|
|
do { \
|
|
if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) & \
|
|
~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) { \
|
|
kdb_frame->pc += BKPT_SIZE; \
|
|
kdb_thrctx->pcb_regs.pc += BKPT_SIZE; \
|
|
} \
|
|
} while (0);
|
|
|
|
|
|
/*
|
|
* Test of instructions to see class.
|
|
*/
|
|
#define IT_CALL 0x01
|
|
#define IT_BRANCH 0x02
|
|
#define IT_LOAD 0x03
|
|
#define IT_STORE 0x04
|
|
|
|
#define inst_branch(i) (db_inst_type(i) == IT_BRANCH)
|
|
#define inst_trap_return(i) ((i) & 0)
|
|
#define inst_call(i) (db_inst_type(i) == IT_CALL)
|
|
#define inst_return(i) ((i) == 0x03e00008)
|
|
#define inst_load(i) (db_inst_type(i) == IT_LOAD)
|
|
#define inst_store(i) (db_inst_type(i) == IT_STORE)
|
|
|
|
int db_inst_type(int);
|
|
db_addr_t branch_taken(int inst, db_addr_t pc);
|
|
int32_t kdbpeek(int *);
|
|
int64_t kdbpeekd(int *);
|
|
|
|
#endif /* !_MIPS_DB_MACHDEP_H_ */
|