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Make breakpoints and single-step work.

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This commit is contained in:
Doug Rabson 1998-06-28 01:00:27 +00:00
parent c2e7b2e40f
commit f4487e1157
1 changed files with 14 additions and 4 deletions
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18
sys/alpha/include/db_machdep.h
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@ -34,10 +34,14 @@
* Machine-dependent defines for new kernel debugger.
*/
#include "opt_simos.h"
#include <sys/param.h>
#include <vm/vm.h>
#include <machine/frame.h>
#define DB_NO_AOUT
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef long db_expr_t; /* expression - signed */
@ -47,18 +51,25 @@ db_regs_t ddb_regs; /* register state */
#define PC_REGS(regs) ((db_addr_t)(regs)->tf_regs[FRAME_PC])
#ifdef SIMOS
#define BKPT_INST 0x000000aa /* gentrap instruction */
#else
#define BKPT_INST 0x00000080 /* breakpoint instruction */
#endif
#define BKPT_SIZE (4) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#if 0
#define FIXUP_PC_AFTER_BREAK \
(ddb_regs.tf_regs[FRAME_PC] -= BKPT_SIZE)
#endif
(ddb_regs.tf_regs[FRAME_PC] -= BKPT_SIZE);
#define SOFTWARE_SSTEP 1 /* no hardware support */
#ifdef SIMOS
#define IS_BREAKPOINT_TRAP(type, code) ((type) == ALPHA_KENTRY_IF && \
(code) == ALPHA_IF_CODE_GENTRAP)
#else
#define IS_BREAKPOINT_TRAP(type, code) ((type) == ALPHA_KENTRY_IF && \
(code) == ALPHA_IF_CODE_BPT)
#endif
#define IS_WATCHPOINT_TRAP(type, code) 0
/*
@ -106,7 +117,6 @@ int ddb_trap __P((unsigned long, unsigned long, unsigned long,
/*
* We use Elf64 symbols in DDB.
*/
#define DB_ELF_SYMBOLS
#define DB_ELFSIZE 64
#endif /* _ALPHA_DB_MACHDEP_H_ */