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Diffstat (limited to 'sys/amd64/include/db_machdep.h')
| -rw-r--r-- | sys/amd64/include/db_machdep.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sys/amd64/include/db_machdep.h b/sys/amd64/include/db_machdep.h new file mode 100644 index 000000000000..d354fc9ed607 --- /dev/null +++ b/sys/amd64/include/db_machdep.h @@ -0,0 +1,83 @@ +/*- + * Mach Operating System + * Copyright (c) 1991,1990 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ + +#ifndef _MACHINE_DB_MACHDEP_H_ +#define _MACHINE_DB_MACHDEP_H_ + +#include <machine/frame.h> +#include <machine/trap.h> + +typedef vm_offset_t db_addr_t; /* address - unsigned */ +typedef long db_expr_t; /* expression - signed */ + +#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_rip) + +#define BKPT_INST 0xcc /* breakpoint instruction */ +#define BKPT_SIZE (1) /* size of breakpoint inst */ +#define BKPT_SET(inst) (BKPT_INST) + +#define BKPT_SKIP \ +do { \ + kdb_frame->tf_rip += 1; \ + kdb_thrctx->pcb_rip += 1; \ +} while(0) + +#define FIXUP_PC_AFTER_BREAK \ +do { \ + kdb_frame->tf_rip -= 1; \ + kdb_thrctx->pcb_rip -= 1; \ +} while(0); + +#define db_clear_single_step kdb_cpu_clear_singlestep +#define db_set_single_step kdb_cpu_set_singlestep + +/* + * The debug exception type is copied from %dr6 to 'code' and used to + * disambiguate single step traps. Watchpoints have no special support. + * Our hardware breakpoints are not well integrated with ddb and are too + * different from watchpoints. ddb treats them as unknown traps with + * unknown addresses and doesn't turn them off while it is running. + */ +#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) +#define IS_SSTEP_TRAP(type, code) \ + ((type) == T_TRCTRAP && (code) & DBREG_DR6_BS) +#define IS_WATCHPOINT_TRAP(type, code) 0 + +#define I_CALL 0xe8 +#define I_CALLI 0xff +#define i_calli(ins) (((ins)&0xff) == I_CALLI && ((ins)&0x3800) == 0x1000) +#define I_RET 0xc3 +#define I_IRET 0xcf +#define i_rex(ins) (((ins) & 0xff) == 0x41 || ((ins) & 0xff) == 0x43) + +#define inst_trap_return(ins) (((ins)&0xff) == I_IRET) +#define inst_return(ins) (((ins)&0xff) == I_RET) +#define inst_call(ins) (((ins)&0xff) == I_CALL || i_calli(ins) || \ + (i_calli((ins) >> 8) && i_rex(ins))) +#define inst_load(ins) 0 +#define inst_store(ins) 0 + +#endif /* !_MACHINE_DB_MACHDEP_H_ */ |