Annotation of sys/arch/powerpc/include/db_machdep.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: db_machdep.h,v 1.21 2005/12/17 07:31:26 miod Exp $ */
2: /* $NetBSD: db_machdep.h,v 1.13 1996/04/29 20:50:08 leo Exp $ */
3:
4: /*
5: * Mach Operating System
6: * Copyright (c) 1992 Carnegie Mellon University
7: * All Rights Reserved.
8: *
9: * Permission to use, copy, modify and distribute this software and its
10: * documentation is hereby granted, provided that both the copyright
11: * notice and this permission notice appear in all copies of the
12: * software, derivative works or modified versions, and any portions
13: * thereof, and that both notices appear in supporting documentation.
14: *
15: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18: *
19: * Carnegie Mellon requests users of this software to return to
20: *
21: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22: * School of Computer Science
23: * Carnegie Mellon University
24: * Pittsburgh PA 15213-3890
25: *
26: * any improvements or extensions that they make and grant Carnegie Mellon
27: * the rights to redistribute these changes.
28: */
29:
30: /*
31: * Machine-dependent defines for new kernel debugger.
32: */
33: #ifndef _PPC_DB_MACHDEP_H_
34: #define _PPC_DB_MACHDEP_H_
35:
36: #include <sys/types.h>
37: #include <uvm/uvm_param.h>
38: #include <machine/trap.h>
39:
40: /*
41: * We use Elf32 symbols in DDB.
42: */
43: #define DB_ELF_SYMBOLS
44: #define DB_ELFSIZE 32
45:
46: typedef vaddr_t db_addr_t; /* address - unsigned */
47: typedef long db_expr_t; /* expression - signed */
48: struct powerpc_saved_state {
49: struct trapframe tf;
50: };
51: typedef struct powerpc_saved_state db_regs_t;
52: extern db_regs_t ddb_regs; /* register state */
53: #define DDB_REGS (&ddb_regs)
54:
55: #define PC_REGS(regs) ((regs)->tf.srr0)
56: #define SET_PC_REGS(regs, value) PC_REGS(regs) = (value)
57:
58: #define BKPT_INST 0x7C810808 /* breakpoint instruction */
59:
60: #define BKPT_SIZE (4) /* size of breakpoint inst */
61: #define BKPT_SET(inst) (BKPT_INST)
62:
63: #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf.srr0 -= 4)
64:
65: #define SR_SINGLESTEP 0x8000
66: #define db_clear_single_step(regs) ((regs)->tf.srr1 &= ~SR_SINGLESTEP)
67: #define db_set_single_step(regs) ((regs)->tf.srr1 |= SR_SINGLESTEP)
68:
69: #define T_BREAKPOINT 0xffff
70: #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
71:
72: #ifdef T_WATCHPOINT
73: #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
74: #else
75: #define IS_WATCHPOINT_TRAP(type, code) 0
76: #endif
77:
78: #define M_RTS 0xfc0007fe
79: #define I_RTS 0x4c000020
80: #define M_BC 0xfc000000
81: #define I_BC 0x40000000
82: #define M_B 0xfc000000
83: #define I_B 0x50000000
84: #define M_RFI 0xfc0007fe
85: #define I_RFI 0x4c000064
86:
87: #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI)
88: #define inst_return(ins) (((ins)&M_RTS) == I_RTS)
89: #define inst_call(ins) (((ins)&M_BC ) == I_BC || \
90: ((ins)&M_B ) == I_B )
91: #define inst_load(ins) 0
92: #define inst_store(ins) 0
93:
94: #ifdef _KERNEL
95:
96: void kdb_kintr(void *);
97: int kdb_trap(int, void *);
98: void db_save_regs(struct trapframe *frame);
99: void ddb_trap(void);
100: db_expr_t db_dumpframe(u_int32_t pframe, int (*pr)(const char *, ...));
101:
102: #endif /* _KERNEL */
103:
104: #endif /* _PPC_DB_MACHDEP_H_ */
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