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      1 /*	$NetBSD: db_machdep.c,v 1.2 2021/02/23 07:13:52 mrg Exp $ */
      2 
      3 /*
      4  * Mach Operating System
      5  * Copyright (c) 1991,1990 Carnegie Mellon University
      6  * All Rights Reserved.
      7  *
      8  * Permission to use, copy, modify and distribute this software and its
      9  * documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie the
     26  * rights to redistribute these changes.
     27  *
     28  *	From: db_interface.c,v 2.4 1991/02/05 17:11:13 mrt (CMU)
     29  */
     30 
     31 /*
     32  * Interface to new debugger.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: db_machdep.c,v 1.2 2021/02/23 07:13:52 mrg Exp $");
     37 
     38 #ifdef _KERNEL_OPT
     39 #include "opt_ddb.h"
     40 #endif
     41 
     42 #include <sys/param.h>
     43 #include <machine/db_machdep.h>
     44 #include <ddb/db_user.h>
     45 #include <ddb/db_command.h>
     46 #include <ddb/db_variables.h>
     47 
     48 /*
     49  * Machine register set.
     50  */
     51 #define dbreg(xx) (long *)offsetof(db_regs_t, db_tf.tf_ ## xx)
     52 #define dbregfr(xx) (long *)offsetof(db_regs_t, db_fr.fr_ ## xx)
     53 
     54 static int db_sparc_regop(const struct db_variable *, db_expr_t *, int);
     55 
     56 db_regs_t *ddb_regp;
     57 static long nil;
     58 
     59 const struct db_variable db_regs[] = {
     60 	{ "psr",	dbreg(psr),		db_sparc_regop, NULL, },
     61 	{ "pc",		dbreg(pc),		db_sparc_regop, NULL, },
     62 	{ "npc",	dbreg(npc),		db_sparc_regop, NULL, },
     63 	{ "y",		dbreg(y),		db_sparc_regop, NULL, },
     64 	{ "wim",	dbreg(global[0]),	db_sparc_regop, NULL, }, /* see reg.h */
     65 	{ "g0",		&nil,			FCN_NULL, 	NULL, },
     66 	{ "g1",		dbreg(global[1]),	db_sparc_regop, NULL, },
     67 	{ "g2",		dbreg(global[2]),	db_sparc_regop, NULL, },
     68 	{ "g3",		dbreg(global[3]),	db_sparc_regop, NULL, },
     69 	{ "g4",		dbreg(global[4]),	db_sparc_regop, NULL, },
     70 	{ "g5",		dbreg(global[5]),	db_sparc_regop, NULL, },
     71 	{ "g6",		dbreg(global[6]),	db_sparc_regop, NULL, },
     72 	{ "g7",		dbreg(global[7]),	db_sparc_regop, NULL, },
     73 	{ "o0",		dbreg(out[0]),		db_sparc_regop, NULL, },
     74 	{ "o1",		dbreg(out[1]),		db_sparc_regop, NULL, },
     75 	{ "o2",		dbreg(out[2]),		db_sparc_regop, NULL, },
     76 	{ "o3",		dbreg(out[3]),		db_sparc_regop, NULL, },
     77 	{ "o4",		dbreg(out[4]),		db_sparc_regop, NULL, },
     78 	{ "o5",		dbreg(out[5]),		db_sparc_regop, NULL, },
     79 	{ "o6",		dbreg(out[6]),		db_sparc_regop, NULL, },
     80 	{ "o7",		dbreg(out[7]),		db_sparc_regop, NULL, },
     81 	{ "l0",		dbregfr(local[0]),	db_sparc_regop, NULL, },
     82 	{ "l1",		dbregfr(local[1]),	db_sparc_regop, NULL, },
     83 	{ "l2",		dbregfr(local[2]),	db_sparc_regop, NULL, },
     84 	{ "l3",		dbregfr(local[3]),	db_sparc_regop, NULL, },
     85 	{ "l4",		dbregfr(local[4]),	db_sparc_regop, NULL, },
     86 	{ "l5",		dbregfr(local[5]),	db_sparc_regop, NULL, },
     87 	{ "l6",		dbregfr(local[6]),	db_sparc_regop, NULL, },
     88 	{ "l7",		dbregfr(local[7]),	db_sparc_regop, NULL, },
     89 	{ "i0",		dbregfr(arg[0]),	db_sparc_regop, NULL, },
     90 	{ "i1",		dbregfr(arg[1]),	db_sparc_regop, NULL, },
     91 	{ "i2",		dbregfr(arg[2]),	db_sparc_regop, NULL, },
     92 	{ "i3",		dbregfr(arg[3]),	db_sparc_regop, NULL, },
     93 	{ "i4",		dbregfr(arg[4]),	db_sparc_regop, NULL, },
     94 	{ "i5",		dbregfr(arg[5]),	db_sparc_regop, NULL, },
     95 	{ "i6",		dbregfr(fp),		db_sparc_regop, NULL, },
     96 	{ "i7",		dbregfr(pc),		db_sparc_regop, NULL, },
     97 };
     98 const struct db_variable * const db_eregs =
     99     db_regs + sizeof(db_regs)/sizeof(db_regs[0]);
    100 
    101 static int
    102 db_sparc_regop(const struct db_variable *vp, db_expr_t *val, int opcode)
    103 {
    104 	db_expr_t *regaddr =
    105 	    (db_expr_t *)(((uint8_t *)DDB_REGS) + ((size_t)vp->valuep));
    106 
    107 	switch (opcode) {
    108 	case DB_VAR_GET:
    109 		*val = *regaddr;
    110 		break;
    111 	case DB_VAR_SET:
    112 		*regaddr = *val;
    113 		break;
    114 	default:
    115 #ifdef _KERNEL
    116 		panic("db_sparc_regop: unknown op %d", opcode);
    117 #else
    118 		printf("db_sparc_regop: unknown op %d\n", opcode);
    119 #endif
    120 	}
    121 	return 0;
    122 }
    123 
    124 #ifndef DDB
    125 const struct db_command db_machine_command_table[] = {
    126 	{ DDB_END_CMD },
    127 };
    128 #endif /* DDB */
    129