1 #ifndef _ASM_KDBPRIVATE_H
2 #define _ASM_KDBPRIVATE_H
5 * Kernel Debugger Architecture Dependent Private Headers
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
11 * Copyright (c) 1999-2006 Silicon Graphics, Inc. All Rights Reserved.
14 typedef unsigned char kdb_machinst_t;
17 * KDB_MAXBPT describes the total number of breakpoints
18 * supported by this architecure.
23 * KDB_MAXHARDBPT describes the total number of hardware
24 * breakpoint registers that exist.
26 #define KDB_MAXHARDBPT 4
28 /* Maximum number of arguments to a function */
29 #define KDBA_MAXARGS 16
32 * Platform specific environment entries
34 #define KDB_PLATFORM_ENV "IDMODE=x86", "BYTESPERWORD=4", "IDCOUNT=16"
37 * Support for ia32 debug registers
39 typedef struct _kdbhard_bp {
40 kdb_machreg_t bph_reg; /* Register this breakpoint uses */
42 unsigned int bph_free:1; /* Register available for use */
43 unsigned int bph_data:1; /* Data Access breakpoint */
45 unsigned int bph_write:1; /* Write Data breakpoint */
46 unsigned int bph_mode:2; /* 0=inst, 1=write, 2=io, 3=read */
47 unsigned int bph_length:2; /* 0=1, 1=2, 2=BAD, 3=4 (bytes) */
50 #define IA32_BREAKPOINT_INSTRUCTION 0xcc
52 #define DR6_BT 0x00008000
53 #define DR6_BS 0x00004000
54 #define DR6_BD 0x00002000
56 #define DR6_B3 0x00000008
57 #define DR6_B2 0x00000004
58 #define DR6_B1 0x00000002
59 #define DR6_B0 0x00000001
60 #define DR6_DR_MASK 0x0000000F
62 #define DR7_RW_VAL(dr, drnum) \
63 (((dr) >> (16 + (4 * (drnum)))) & 0x3)
65 #define DR7_RW_SET(dr, drnum, rw) \
67 (dr) &= ~(0x3 << (16 + (4 * (drnum)))); \
68 (dr) |= (((rw) & 0x3) << (16 + (4 * (drnum)))); \
71 #define DR7_RW0(dr) DR7_RW_VAL(dr, 0)
72 #define DR7_RW0SET(dr,rw) DR7_RW_SET(dr, 0, rw)
73 #define DR7_RW1(dr) DR7_RW_VAL(dr, 1)
74 #define DR7_RW1SET(dr,rw) DR7_RW_SET(dr, 1, rw)
75 #define DR7_RW2(dr) DR7_RW_VAL(dr, 2)
76 #define DR7_RW2SET(dr,rw) DR7_RW_SET(dr, 2, rw)
77 #define DR7_RW3(dr) DR7_RW_VAL(dr, 3)
78 #define DR7_RW3SET(dr,rw) DR7_RW_SET(dr, 3, rw)
81 #define DR7_LEN_VAL(dr, drnum) \
82 (((dr) >> (18 + (4 * (drnum)))) & 0x3)
84 #define DR7_LEN_SET(dr, drnum, rw) \
86 (dr) &= ~(0x3 << (18 + (4 * (drnum)))); \
87 (dr) |= (((rw) & 0x3) << (18 + (4 * (drnum)))); \
90 #define DR7_LEN0(dr) DR7_LEN_VAL(dr, 0)
91 #define DR7_LEN0SET(dr,len) DR7_LEN_SET(dr, 0, len)
92 #define DR7_LEN1(dr) DR7_LEN_VAL(dr, 1)
93 #define DR7_LEN1SET(dr,len) DR7_LEN_SET(dr, 1, len)
94 #define DR7_LEN2(dr) DR7_LEN_VAL(dr, 2)
95 #define DR7_LEN2SET(dr,len) DR7_LEN_SET(dr, 2, len)
96 #define DR7_LEN3(dr) DR7_LEN_VAL(dr, 3)
97 #define DR7_LEN3SET(dr,len) DR7_LEN_SET(dr, 3, len)
99 #define DR7_G0(dr) (((dr)>>1)&0x1)
100 #define DR7_G0SET(dr) ((dr) |= 0x2)
101 #define DR7_G0CLR(dr) ((dr) &= ~0x2)
102 #define DR7_G1(dr) (((dr)>>3)&0x1)
103 #define DR7_G1SET(dr) ((dr) |= 0x8)
104 #define DR7_G1CLR(dr) ((dr) &= ~0x8)
105 #define DR7_G2(dr) (((dr)>>5)&0x1)
106 #define DR7_G2SET(dr) ((dr) |= 0x20)
107 #define DR7_G2CLR(dr) ((dr) &= ~0x20)
108 #define DR7_G3(dr) (((dr)>>7)&0x1)
109 #define DR7_G3SET(dr) ((dr) |= 0x80)
110 #define DR7_G3CLR(dr) ((dr) &= ~0x80)
112 #define DR7_L0(dr) (((dr))&0x1)
113 #define DR7_L0SET(dr) ((dr) |= 0x1)
114 #define DR7_L0CLR(dr) ((dr) &= ~0x1)
115 #define DR7_L1(dr) (((dr)>>2)&0x1)
116 #define DR7_L1SET(dr) ((dr) |= 0x4)
117 #define DR7_L1CLR(dr) ((dr) &= ~0x4)
118 #define DR7_L2(dr) (((dr)>>4)&0x1)
119 #define DR7_L2SET(dr) ((dr) |= 0x10)
120 #define DR7_L2CLR(dr) ((dr) &= ~0x10)
121 #define DR7_L3(dr) (((dr)>>6)&0x1)
122 #define DR7_L3SET(dr) ((dr) |= 0x40)
123 #define DR7_L3CLR(dr) ((dr) &= ~0x40)
125 #define DR7_GD 0x00002000 /* General Detect Enable */
126 #define DR7_GE 0x00000200 /* Global exact */
127 #define DR7_LE 0x00000100 /* Local exact */
129 #define DR_TYPE_EXECUTE 0x0
130 #define DR_TYPE_WRITE 0x1
131 #define DR_TYPE_IO 0x2
132 #define DR_TYPE_RW 0x3
134 extern kdb_machreg_t kdba_getdr6(void);
135 extern void kdba_putdr6(kdb_machreg_t);
137 extern kdb_machreg_t kdba_getdr7(void);
140 * Support for setjmp/longjmp
149 typedef struct __kdb_jmp_buf {
150 unsigned long regs[6]; /* kdba_setjmp assumes fixed offsets here */
153 extern int asmlinkage kdba_setjmp(kdb_jmp_buf *);
154 extern void asmlinkage kdba_longjmp(kdb_jmp_buf *, int);
155 #define kdba_setjmp kdba_setjmp
157 extern kdb_jmp_buf *kdbjmpbuf;
159 /* Arch specific data saved for running processes */
161 struct kdba_running_process {
162 long esp; /* CONFIG_4KSTACKS may be on a different stack */
163 long eip; /* eip when esp was set */
167 void kdba_save_running(struct kdba_running_process *k, struct pt_regs *regs)
169 k->esp = current_stack_pointer;
170 __asm__ __volatile__ ( " lea 1f,%%eax; movl %%eax,%0 ; 1: " : "=r"(k->eip) : : "eax" );
174 void kdba_unsave_running(struct kdba_running_process *k, struct pt_regs *regs)
178 struct kdb_activation_record;
179 extern void kdba_get_stack_info_alternate(kdb_machreg_t addr, int cpu,
180 struct kdb_activation_record *ar);
182 extern void kdba_wait_for_cpus(void);
184 extern void kdb_interrupt(void);
186 #define KDB_INT_REGISTERS 8
189 #endif /* !_ASM_KDBPRIVATE_H */