aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-s390/ptrace.h
blob: 4d75d77b0f9960cad73cedb09adaae4e85a6c5c1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
/*
 *  include/asm-s390/ptrace.h
 *
 *  S390 version
 *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
 */

#ifndef _S390_PTRACE_H
#define _S390_PTRACE_H

/*
 * Offsets in the user_regs_struct. They are used for the ptrace
 * system call and in entry.S
 */
#ifndef __s390x__

#define PT_PSWMASK  0x00
#define PT_PSWADDR  0x04
#define PT_GPR0     0x08
#define PT_GPR1     0x0C
#define PT_GPR2     0x10
#define PT_GPR3     0x14
#define PT_GPR4     0x18
#define PT_GPR5     0x1C
#define PT_GPR6     0x20
#define PT_GPR7     0x24
#define PT_GPR8     0x28
#define PT_GPR9     0x2C
#define PT_GPR10    0x30
#define PT_GPR11    0x34
#define PT_GPR12    0x38
#define PT_GPR13    0x3C
#define PT_GPR14    0x40
#define PT_GPR15    0x44
#define PT_ACR0     0x48
#define PT_ACR1     0x4C
#define PT_ACR2     0x50
#define PT_ACR3     0x54
#define PT_ACR4	    0x58
#define PT_ACR5	    0x5C
#define PT_ACR6	    0x60
#define PT_ACR7	    0x64
#define PT_ACR8	    0x68
#define PT_ACR9	    0x6C
#define PT_ACR10    0x70
#define PT_ACR11    0x74
#define PT_ACR12    0x78
#define PT_ACR13    0x7C
#define PT_ACR14    0x80
#define PT_ACR15    0x84
#define PT_ORIGGPR2 0x88
#define PT_FPC	    0x90
/*
 * A nasty fact of life that the ptrace api
 * only supports passing of longs.
 */
#define PT_FPR0_HI  0x98
#define PT_FPR0_LO  0x9C
#define PT_FPR1_HI  0xA0
#define PT_FPR1_LO  0xA4
#define PT_FPR2_HI  0xA8
#define PT_FPR2_LO  0xAC
#define PT_FPR3_HI  0xB0
#define PT_FPR3_LO  0xB4
#define PT_FPR4_HI  0xB8
#define PT_FPR4_LO  0xBC
#define PT_FPR5_HI  0xC0
#define PT_FPR5_LO  0xC4
#define PT_FPR6_HI  0xC8
#define PT_FPR6_LO  0xCC
#define PT_FPR7_HI  0xD0
#define PT_FPR7_LO  0xD4
#define PT_FPR8_HI  0xD8
#define PT_FPR8_LO  0XDC
#define PT_FPR9_HI  0xE0
#define PT_FPR9_LO  0xE4
#define PT_FPR10_HI 0xE8
#define PT_FPR10_LO 0xEC
#define PT_FPR11_HI 0xF0
#define PT_FPR11_LO 0xF4
#define PT_FPR12_HI 0xF8
#define PT_FPR12_LO 0xFC
#define PT_FPR13_HI 0x100
#define PT_FPR13_LO 0x104
#define PT_FPR14_HI 0x108
#define PT_FPR14_LO 0x10C
#define PT_FPR15_HI 0x110
#define PT_FPR15_LO 0x114
#define PT_CR_9	    0x118
#define PT_CR_10    0x11C
#define PT_CR_11    0x120
#define PT_IEEE_IP  0x13C
#define PT_LASTOFF  PT_IEEE_IP
#define PT_ENDREGS  0x140-1

#define GPR_SIZE	4
#define CR_SIZE		4

#define STACK_FRAME_OVERHEAD	96	/* size of minimum stack frame */

#else /* __s390x__ */

#define PT_PSWMASK  0x00
#define PT_PSWADDR  0x08
#define PT_GPR0     0x10
#define PT_GPR1     0x18
#define PT_GPR2     0x20
#define PT_GPR3     0x28
#define PT_GPR4     0x30
#define PT_GPR5     0x38
#define PT_GPR6     0x40
#define PT_GPR7     0x48
#define PT_GPR8     0x50
#define PT_GPR9     0x58
#define PT_GPR10    0x60
#define PT_GPR11    0x68
#define PT_GPR12    0x70
#define PT_GPR13    0x78
#define PT_GPR14    0x80
#define PT_GPR15    0x88
#define PT_ACR0     0x90
#define PT_ACR1     0x94
#define PT_ACR2     0x98
#define PT_ACR3     0x9C
#define PT_ACR4	    0xA0
#define PT_ACR5	    0xA4
#define PT_ACR6	    0xA8
#define PT_ACR7	    0xAC
#define PT_ACR8	    0xB0
#define PT_ACR9	    0xB4
#define PT_ACR10    0xB8
#define PT_ACR11    0xBC
#define PT_ACR12    0xC0
#define PT_ACR13    0xC4
#define PT_ACR14    0xC8
#define PT_ACR15    0xCC
#define PT_ORIGGPR2 0xD0
#define PT_FPC	    0xD8
#define PT_FPR0     0xE0
#define PT_FPR1     0xE8
#define PT_FPR2     0xF0
#define PT_FPR3     0xF8
#define PT_FPR4     0x100
#define PT_FPR5     0x108
#define PT_FPR6     0x110
#define PT_FPR7     0x118
#define PT_FPR8     0x120
#define PT_FPR9     0x128
#define PT_FPR10    0x130
#define PT_FPR11    0x138
#define PT_FPR12    0x140
#define PT_FPR13    0x148
#define PT_FPR14    0x150
#define PT_FPR15    0x158
#define PT_CR_9     0x160
#define PT_CR_10    0x168
#define PT_CR_11    0x170
#define PT_IEEE_IP  0x1A8
#define PT_LASTOFF  PT_IEEE_IP
#define PT_ENDREGS  0x1B0-1

#define GPR_SIZE	8
#define CR_SIZE		8

#define STACK_FRAME_OVERHEAD    160      /* size of minimum stack frame */

#endif /* __s390x__ */

#define NUM_GPRS	16
#define NUM_FPRS	16
#define NUM_CRS		16
#define NUM_ACRS	16

#define FPR_SIZE	8
#define FPC_SIZE	4
#define FPC_PAD_SIZE	4 /* gcc insists on aligning the fpregs */
#define ACR_SIZE	4


#define PTRACE_OLDSETOPTIONS         21

#ifndef __ASSEMBLY__
#include <linux/stddef.h>
#include <linux/types.h>

typedef union
{
	float   f;
	double  d;
        __u64   ui;
	struct
	{
		__u32 hi;
		__u32 lo;
	} fp;
} freg_t;

typedef struct
{
	__u32   fpc;
	freg_t  fprs[NUM_FPRS];              
} s390_fp_regs;

#define FPC_EXCEPTION_MASK      0xF8000000
#define FPC_FLAGS_MASK          0x00F80000
#define FPC_DXC_MASK            0x0000FF00
#define FPC_RM_MASK             0x00000003
#define FPC_VALID_MASK          0xF8F8FF03

/* this typedef defines how a Program Status Word looks like */
typedef struct 
{
        unsigned long mask;
        unsigned long addr;
} __attribute__ ((aligned(8))) psw_t;

#ifndef __s390x__

#define PSW_MASK_PER		0x40000000UL
#define PSW_MASK_DAT		0x04000000UL
#define PSW_MASK_IO		0x02000000UL
#define PSW_MASK_EXT		0x01000000UL
#define PSW_MASK_KEY		0x00F00000UL
#define PSW_MASK_MCHECK		0x00040000UL
#define PSW_MASK_WAIT		0x00020000UL
#define PSW_MASK_PSTATE		0x00010000UL
#define PSW_MASK_ASC		0x0000C000UL
#define PSW_MASK_CC		0x00003000UL
#define PSW_MASK_PM		0x00000F00UL

#define PSW_ADDR_AMODE		0x80000000UL
#define PSW_ADDR_INSN		0x7FFFFFFFUL

#define PSW_BASE_BITS		0x00080000UL
#define PSW_DEFAULT_KEY		(((unsigned long) PAGE_DEFAULT_ACC) << 20)

#define PSW_ASC_PRIMARY		0x00000000UL
#define PSW_ASC_ACCREG		0x00004000UL
#define PSW_ASC_SECONDARY	0x00008000UL
#define PSW_ASC_HOME		0x0000C000UL

#else /* __s390x__ */

#define PSW_MASK_PER		0x4000000000000000UL
#define PSW_MASK_DAT		0x0400000000000000UL
#define PSW_MASK_IO		0x0200000000000000UL
#define PSW_MASK_EXT		0x0100000000000000UL
#define PSW_MASK_KEY		0x00F0000000000000UL
#define PSW_MASK_MCHECK		0x0004000000000000UL
#define PSW_MASK_WAIT		0x0002000000000000UL
#define PSW_MASK_PSTATE		0x0001000000000000UL
#define PSW_MASK_ASC		0x0000C00000000000UL
#define PSW_MASK_CC		0x0000300000000000UL
#define PSW_MASK_PM		0x00000F0000000000UL

#define PSW_ADDR_AMODE		0x0000000000000000UL
#define PSW_ADDR_INSN		0xFFFFFFFFFFFFFFFFUL

#define PSW_BASE_BITS		0x0000000180000000UL
#define PSW_BASE32_BITS		0x0000000080000000UL
#define PSW_DEFAULT_KEY		(((unsigned long) PAGE_DEFAULT_ACC) << 52)

#define PSW_ASC_PRIMARY		0x0000000000000000UL
#define PSW_ASC_ACCREG		0x0000400000000000UL
#define PSW_ASC_SECONDARY	0x0000800000000000UL
#define PSW_ASC_HOME		0x0000C00000000000UL

#define PSW_USER32_BITS (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
			 PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
			 PSW_MASK_PSTATE | PSW_DEFAULT_KEY)

#endif /* __s390x__ */

#define PSW_KERNEL_BITS	(PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
			 PSW_MASK_MCHECK | PSW_DEFAULT_KEY)
#define PSW_USER_BITS	(PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
			 PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
			 PSW_MASK_PSTATE | PSW_DEFAULT_KEY)

/* This macro merges a NEW PSW mask specified by the user into
   the currently active PSW mask CURRENT, modifying only those
   bits in CURRENT that the user may be allowed to change: this
   is the condition code and the program mask bits.  */
#define PSW_MASK_MERGE(CURRENT,NEW) \
	(((CURRENT) & ~(PSW_MASK_CC|PSW_MASK_PM)) | \
	 ((NEW) & (PSW_MASK_CC|PSW_MASK_PM)))

/*
 * The s390_regs structure is used to define the elf_gregset_t.
 */
typedef struct
{
	psw_t psw;
	unsigned long gprs[NUM_GPRS];
	unsigned int  acrs[NUM_ACRS];
	unsigned long orig_gpr2;
} s390_regs;

#ifdef __KERNEL__
#include <asm/setup.h>
#include <asm/page.h>

/*
 * The pt_regs struct defines the way the registers are stored on
 * the stack during a system call.
 */
struct pt_regs 
{
	unsigned long args[1];
	psw_t psw;
	unsigned long gprs[NUM_GPRS];
	unsigned long orig_gpr2;
	unsigned short ilc;
	unsigned short trap;
};
#endif

/*
 * Now for the program event recording (trace) definitions.
 */
typedef struct
{
	unsigned long cr[3];
} per_cr_words;

#define PER_EM_MASK 0xE8000000UL

typedef	struct
{
#ifdef __s390x__
	unsigned                       : 32;
#endif /* __s390x__ */
	unsigned em_branching          : 1;
	unsigned em_instruction_fetch  : 1;
	/*
	 * Switching on storage alteration automatically fixes
	 * the storage alteration event bit in the users std.
	 */
	unsigned em_storage_alteration : 1;
	unsigned em_gpr_alt_unused     : 1;
	unsigned em_store_real_address : 1;
	unsigned                       : 3;
	unsigned branch_addr_ctl       : 1;
	unsigned                       : 1;
	unsigned storage_alt_space_ctl : 1;
	unsigned                       : 21;
	unsigned long starting_addr;
	unsigned long ending_addr;
} per_cr_bits;

typedef struct
{
	unsigned short perc_atmid;
	unsigned long address;
	unsigned char access_id;
} per_lowcore_words;

typedef struct
{
	unsigned perc_branching          : 1;
	unsigned perc_instruction_fetch  : 1;
	unsigned perc_storage_alteration : 1;
	unsigned perc_gpr_alt_unused     : 1;
	unsigned perc_store_real_address : 1;
	unsigned                         : 3;
	unsigned atmid_psw_bit_31        : 1;
	unsigned atmid_validity_bit      : 1;
	unsigned atmid_psw_bit_32        : 1;
	unsigned atmid_psw_bit_5         : 1;
	unsigned atmid_psw_bit_16        : 1;
	unsigned atmid_psw_bit_17        : 1;
	unsigned si                      : 2;
	unsigned long address;
	unsigned                         : 4;
	unsigned access_id               : 4;
} per_lowcore_bits;

typedef struct
{
	union {
		per_cr_words   words;
		per_cr_bits    bits;
	} control_regs;
	/*
	 * Use these flags instead of setting em_instruction_fetch
	 * directly they are used so that single stepping can be
	 * switched on & off while not affecting other tracing
	 */
	unsigned  single_step       : 1;
	unsigned  instruction_fetch : 1;
	unsigned                    : 30;
	/*
	 * These addresses are copied into cr10 & cr11 if single
	 * stepping is switched off
	 */
	unsigned long starting_addr;
	unsigned long ending_addr;
	union {
		per_lowcore_words words;
		per_lowcore_bits  bits;
	} lowcore; 
} per_struct;

typedef struct
{
	unsigned int  len;
	unsigned long kernel_addr;
	unsigned long process_addr;
} ptrace_area;

/*
 * S/390 specific non posix ptrace requests. I chose unusual values so
 * they are unlikely to clash with future ptrace definitions.
 */
#define PTRACE_PEEKUSR_AREA           0x5000
#define PTRACE_POKEUSR_AREA           0x5001
#define PTRACE_PEEKTEXT_AREA	      0x5002
#define PTRACE_PEEKDATA_AREA	      0x5003
#define PTRACE_POKETEXT_AREA	      0x5004
#define PTRACE_POKEDATA_AREA 	      0x5005

/*
 * PT_PROT definition is loosely based on hppa bsd definition in
 * gdb/hppab-nat.c
 */
#define PTRACE_PROT                       21

typedef enum
{
	ptprot_set_access_watchpoint,
	ptprot_set_write_watchpoint,
	ptprot_disable_watchpoint
} ptprot_flags;

typedef struct
{
	unsigned long lowaddr;
	unsigned long hiaddr;
	ptprot_flags prot;
} ptprot_area;                     

/* Sequence of bytes for breakpoint illegal instruction.  */
#define S390_BREAKPOINT     {0x0,0x1}
#define S390_BREAKPOINT_U16 ((__u16)0x0001)
#define S390_SYSCALL_OPCODE ((__u16)0x0a00)
#define S390_SYSCALL_SIZE   2

/*
 * The user_regs_struct defines the way the user registers are
 * store on the stack for signal handling.
 */
struct user_regs_struct
{
	psw_t psw;
	unsigned long gprs[NUM_GPRS];
	unsigned int  acrs[NUM_ACRS];
	unsigned long orig_gpr2;
	s390_fp_regs fp_regs;
	/*
	 * These per registers are in here so that gdb can modify them
	 * itself as there is no "official" ptrace interface for hardware
	 * watchpoints. This is the way intel does it.
	 */
	per_struct per_info;
	unsigned long ieee_instruction_pointer; 
	/* Used to give failing instruction back to user for ieee exceptions */
};

#ifdef __KERNEL__
#define __ARCH_SYS_PTRACE	1

#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
#define profile_pc(regs) instruction_pointer(regs)
extern void show_regs(struct pt_regs * regs);
#endif

static inline void
psw_set_key(unsigned int key)
{
	asm volatile ( "spka 0(%0)" : : "d" (key) );
}

#endif /* __ASSEMBLY__ */

#endif /* _S390_PTRACE_H */