1 /* GNU/Linux S/390 specific low level interface, for the remote server
3 Copyright (C) 2001-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* This file is used for both 31-bit and 64-bit S/390 systems. */
23 #include "linux-low.h"
24 #include "elf/common.h"
26 #include <asm/ptrace.h>
27 #include "nat/gdb_ptrace.h"
31 #ifndef HWCAP_S390_HIGH_GPRS
32 #define HWCAP_S390_HIGH_GPRS 512
36 #define HWCAP_S390_TE 1024
40 #define HWCAP_S390_VX 2048
43 /* Defined in auto-generated file s390-linux32.c. */
44 void init_registers_s390_linux32 (void);
45 extern const struct target_desc
*tdesc_s390_linux32
;
47 /* Defined in auto-generated file s390-linux32v1.c. */
48 void init_registers_s390_linux32v1 (void);
49 extern const struct target_desc
*tdesc_s390_linux32v1
;
51 /* Defined in auto-generated file s390-linux32v2.c. */
52 void init_registers_s390_linux32v2 (void);
53 extern const struct target_desc
*tdesc_s390_linux32v2
;
55 /* Defined in auto-generated file s390-linux64.c. */
56 void init_registers_s390_linux64 (void);
57 extern const struct target_desc
*tdesc_s390_linux64
;
59 /* Defined in auto-generated file s390-linux64v1.c. */
60 void init_registers_s390_linux64v1 (void);
61 extern const struct target_desc
*tdesc_s390_linux64v1
;
63 /* Defined in auto-generated file s390-linux64v2.c. */
64 void init_registers_s390_linux64v2 (void);
65 extern const struct target_desc
*tdesc_s390_linux64v2
;
67 /* Defined in auto-generated file s390-te-linux64.c. */
68 void init_registers_s390_te_linux64 (void);
69 extern const struct target_desc
*tdesc_s390_te_linux64
;
71 /* Defined in auto-generated file s390-vx-linux64.c. */
72 void init_registers_s390_vx_linux64 (void);
73 extern const struct target_desc
*tdesc_s390_vx_linux64
;
75 /* Defined in auto-generated file s390-tevx-linux64.c. */
76 void init_registers_s390_tevx_linux64 (void);
77 extern const struct target_desc
*tdesc_s390_tevx_linux64
;
79 /* Defined in auto-generated file s390x-linux64.c. */
80 void init_registers_s390x_linux64 (void);
81 extern const struct target_desc
*tdesc_s390x_linux64
;
83 /* Defined in auto-generated file s390x-linux64v1.c. */
84 void init_registers_s390x_linux64v1 (void);
85 extern const struct target_desc
*tdesc_s390x_linux64v1
;
87 /* Defined in auto-generated file s390x-linux64v2.c. */
88 void init_registers_s390x_linux64v2 (void);
89 extern const struct target_desc
*tdesc_s390x_linux64v2
;
91 /* Defined in auto-generated file s390x-te-linux64.c. */
92 void init_registers_s390x_te_linux64 (void);
93 extern const struct target_desc
*tdesc_s390x_te_linux64
;
95 /* Defined in auto-generated file s390x-vx-linux64.c. */
96 void init_registers_s390x_vx_linux64 (void);
97 extern const struct target_desc
*tdesc_s390x_vx_linux64
;
99 /* Defined in auto-generated file s390x-tevx-linux64.c. */
100 void init_registers_s390x_tevx_linux64 (void);
101 extern const struct target_desc
*tdesc_s390x_tevx_linux64
;
103 #define s390_num_regs 52
105 static int s390_regmap
[] = {
106 PT_PSWMASK
, PT_PSWADDR
,
108 PT_GPR0
, PT_GPR1
, PT_GPR2
, PT_GPR3
,
109 PT_GPR4
, PT_GPR5
, PT_GPR6
, PT_GPR7
,
110 PT_GPR8
, PT_GPR9
, PT_GPR10
, PT_GPR11
,
111 PT_GPR12
, PT_GPR13
, PT_GPR14
, PT_GPR15
,
113 PT_ACR0
, PT_ACR1
, PT_ACR2
, PT_ACR3
,
114 PT_ACR4
, PT_ACR5
, PT_ACR6
, PT_ACR7
,
115 PT_ACR8
, PT_ACR9
, PT_ACR10
, PT_ACR11
,
116 PT_ACR12
, PT_ACR13
, PT_ACR14
, PT_ACR15
,
121 PT_FPR0_HI
, PT_FPR1_HI
, PT_FPR2_HI
, PT_FPR3_HI
,
122 PT_FPR4_HI
, PT_FPR5_HI
, PT_FPR6_HI
, PT_FPR7_HI
,
123 PT_FPR8_HI
, PT_FPR9_HI
, PT_FPR10_HI
, PT_FPR11_HI
,
124 PT_FPR12_HI
, PT_FPR13_HI
, PT_FPR14_HI
, PT_FPR15_HI
,
126 PT_FPR0
, PT_FPR1
, PT_FPR2
, PT_FPR3
,
127 PT_FPR4
, PT_FPR5
, PT_FPR6
, PT_FPR7
,
128 PT_FPR8
, PT_FPR9
, PT_FPR10
, PT_FPR11
,
129 PT_FPR12
, PT_FPR13
, PT_FPR14
, PT_FPR15
,
136 #define s390_num_regs_3264 68
138 static int s390_regmap_3264
[] = {
139 PT_PSWMASK
, PT_PSWADDR
,
141 PT_GPR0
, PT_GPR0
, PT_GPR1
, PT_GPR1
,
142 PT_GPR2
, PT_GPR2
, PT_GPR3
, PT_GPR3
,
143 PT_GPR4
, PT_GPR4
, PT_GPR5
, PT_GPR5
,
144 PT_GPR6
, PT_GPR6
, PT_GPR7
, PT_GPR7
,
145 PT_GPR8
, PT_GPR8
, PT_GPR9
, PT_GPR9
,
146 PT_GPR10
, PT_GPR10
, PT_GPR11
, PT_GPR11
,
147 PT_GPR12
, PT_GPR12
, PT_GPR13
, PT_GPR13
,
148 PT_GPR14
, PT_GPR14
, PT_GPR15
, PT_GPR15
,
150 PT_ACR0
, PT_ACR1
, PT_ACR2
, PT_ACR3
,
151 PT_ACR4
, PT_ACR5
, PT_ACR6
, PT_ACR7
,
152 PT_ACR8
, PT_ACR9
, PT_ACR10
, PT_ACR11
,
153 PT_ACR12
, PT_ACR13
, PT_ACR14
, PT_ACR15
,
157 PT_FPR0
, PT_FPR1
, PT_FPR2
, PT_FPR3
,
158 PT_FPR4
, PT_FPR5
, PT_FPR6
, PT_FPR7
,
159 PT_FPR8
, PT_FPR9
, PT_FPR10
, PT_FPR11
,
160 PT_FPR12
, PT_FPR13
, PT_FPR14
, PT_FPR15
,
168 s390_cannot_fetch_register (int regno
)
174 s390_cannot_store_register (int regno
)
180 s390_collect_ptrace_register (struct regcache
*regcache
, int regno
, char *buf
)
182 int size
= register_size (regcache
->tdesc
, regno
);
183 if (size
< sizeof (long))
185 const struct regs_info
*regs_info
= (*the_low_target
.regs_info
) ();
186 struct usrregs_info
*usr
= regs_info
->usrregs
;
187 int regaddr
= usr
->regmap
[regno
];
189 memset (buf
, 0, sizeof (long));
191 if ((regno
^ 1) < usr
->num_regs
192 && usr
->regmap
[regno
^ 1] == regaddr
)
194 collect_register (regcache
, regno
& ~1, buf
);
195 collect_register (regcache
, (regno
& ~1) + 1,
196 buf
+ sizeof (long) - size
);
198 else if (regaddr
== PT_PSWMASK
)
200 /* Convert 4-byte PSW mask to 8 bytes by clearing bit 12 and copying
201 the basic addressing mode bit from the PSW address. */
202 char *addr
= alloca (register_size (regcache
->tdesc
, regno
^ 1));
203 collect_register (regcache
, regno
, buf
);
204 collect_register (regcache
, regno
^ 1, addr
);
206 buf
[size
] |= (addr
[0] & 0x80);
208 else if (regaddr
== PT_PSWADDR
)
210 /* Convert 4-byte PSW address to 8 bytes by clearing the addressing
211 mode bit (which gets copied to the PSW mask instead). */
212 collect_register (regcache
, regno
, buf
+ sizeof (long) - size
);
213 buf
[sizeof (long) - size
] &= ~0x80;
215 else if ((regaddr
>= PT_GPR0
&& regaddr
<= PT_GPR15
)
216 || regaddr
== PT_ORIGGPR2
)
217 collect_register (regcache
, regno
, buf
+ sizeof (long) - size
);
219 collect_register (regcache
, regno
, buf
);
222 collect_register (regcache
, regno
, buf
);
226 s390_supply_ptrace_register (struct regcache
*regcache
,
227 int regno
, const char *buf
)
229 int size
= register_size (regcache
->tdesc
, regno
);
230 if (size
< sizeof (long))
232 const struct regs_info
*regs_info
= (*the_low_target
.regs_info
) ();
233 struct usrregs_info
*usr
= regs_info
->usrregs
;
234 int regaddr
= usr
->regmap
[regno
];
236 if ((regno
^ 1) < usr
->num_regs
237 && usr
->regmap
[regno
^ 1] == regaddr
)
239 supply_register (regcache
, regno
& ~1, buf
);
240 supply_register (regcache
, (regno
& ~1) + 1,
241 buf
+ sizeof (long) - size
);
243 else if (regaddr
== PT_PSWMASK
)
245 /* Convert 8-byte PSW mask to 4 bytes by setting bit 12 and copying
246 the basic addressing mode into the PSW address. */
247 char *mask
= alloca (size
);
248 char *addr
= alloca (register_size (regcache
->tdesc
, regno
^ 1));
249 memcpy (mask
, buf
, size
);
251 supply_register (regcache
, regno
, mask
);
253 collect_register (regcache
, regno
^ 1, addr
);
255 addr
[0] |= (buf
[size
] & 0x80);
256 supply_register (regcache
, regno
^ 1, addr
);
258 else if (regaddr
== PT_PSWADDR
)
260 /* Convert 8-byte PSW address to 4 bytes by truncating, but
261 keeping the addressing mode bit (which was set from the mask). */
262 char *addr
= alloca (size
);
264 collect_register (regcache
, regno
, addr
);
265 amode
= addr
[0] & 0x80;
266 memcpy (addr
, buf
+ sizeof (long) - size
, size
);
269 supply_register (regcache
, regno
, addr
);
271 else if ((regaddr
>= PT_GPR0
&& regaddr
<= PT_GPR15
)
272 || regaddr
== PT_ORIGGPR2
)
273 supply_register (regcache
, regno
, buf
+ sizeof (long) - size
);
275 supply_register (regcache
, regno
, buf
);
278 supply_register (regcache
, regno
, buf
);
281 /* Provide only a fill function for the general register set. ps_lgetregs
282 will use this for NPTL support. */
285 s390_fill_gregset (struct regcache
*regcache
, void *buf
)
288 const struct regs_info
*regs_info
= (*the_low_target
.regs_info
) ();
289 struct usrregs_info
*usr
= regs_info
->usrregs
;
291 for (i
= 0; i
< usr
->num_regs
; i
++)
293 if (usr
->regmap
[i
] < PT_PSWMASK
294 || usr
->regmap
[i
] > PT_ACR15
)
297 s390_collect_ptrace_register (regcache
, i
,
298 (char *) buf
+ usr
->regmap
[i
]);
302 /* Fill and store functions for extended register sets. */
305 s390_store_last_break (struct regcache
*regcache
, const void *buf
)
309 p
= (const char *) buf
+ 8 - register_size (regcache
->tdesc
, 0);
310 supply_register_by_name (regcache
, "last_break", p
);
314 s390_fill_system_call (struct regcache
*regcache
, void *buf
)
316 collect_register_by_name (regcache
, "system_call", buf
);
320 s390_store_system_call (struct regcache
*regcache
, const void *buf
)
322 supply_register_by_name (regcache
, "system_call", buf
);
326 s390_store_tdb (struct regcache
*regcache
, const void *buf
)
328 int tdb0
= find_regno (regcache
->tdesc
, "tdb0");
329 int tr0
= find_regno (regcache
->tdesc
, "tr0");
332 for (i
= 0; i
< 4; i
++)
333 supply_register (regcache
, tdb0
+ i
, (const char *) buf
+ 8 * i
);
335 for (i
= 0; i
< 16; i
++)
336 supply_register (regcache
, tr0
+ i
, (const char *) buf
+ 8 * (16 + i
));
340 s390_fill_vxrs_low (struct regcache
*regcache
, void *buf
)
342 int v0
= find_regno (regcache
->tdesc
, "v0l");
345 for (i
= 0; i
< 16; i
++)
346 collect_register (regcache
, v0
+ i
, (char *) buf
+ 8 * i
);
350 s390_store_vxrs_low (struct regcache
*regcache
, const void *buf
)
352 int v0
= find_regno (regcache
->tdesc
, "v0l");
355 for (i
= 0; i
< 16; i
++)
356 supply_register (regcache
, v0
+ i
, (const char *) buf
+ 8 * i
);
360 s390_fill_vxrs_high (struct regcache
*regcache
, void *buf
)
362 int v16
= find_regno (regcache
->tdesc
, "v16");
365 for (i
= 0; i
< 16; i
++)
366 collect_register (regcache
, v16
+ i
, (char *) buf
+ 16 * i
);
370 s390_store_vxrs_high (struct regcache
*regcache
, const void *buf
)
372 int v16
= find_regno (regcache
->tdesc
, "v16");
375 for (i
= 0; i
< 16; i
++)
376 supply_register (regcache
, v16
+ i
, (const char *) buf
+ 16 * i
);
379 static struct regset_info s390_regsets
[] = {
380 { 0, 0, 0, 0, GENERAL_REGS
, s390_fill_gregset
, NULL
},
381 /* Last break address is read-only; no fill function. */
382 { PTRACE_GETREGSET
, -1, NT_S390_LAST_BREAK
, 0, EXTENDED_REGS
,
383 NULL
, s390_store_last_break
},
384 { PTRACE_GETREGSET
, PTRACE_SETREGSET
, NT_S390_SYSTEM_CALL
, 0,
385 EXTENDED_REGS
, s390_fill_system_call
, s390_store_system_call
},
386 /* TDB is read-only. */
387 { PTRACE_GETREGSET
, -1, NT_S390_TDB
, 0, EXTENDED_REGS
,
388 NULL
, s390_store_tdb
},
389 { PTRACE_GETREGSET
, PTRACE_SETREGSET
, NT_S390_VXRS_LOW
, 0,
390 EXTENDED_REGS
, s390_fill_vxrs_low
, s390_store_vxrs_low
},
391 { PTRACE_GETREGSET
, PTRACE_SETREGSET
, NT_S390_VXRS_HIGH
, 0,
392 EXTENDED_REGS
, s390_fill_vxrs_high
, s390_store_vxrs_high
},
393 { 0, 0, 0, -1, -1, NULL
, NULL
}
397 static const unsigned char s390_breakpoint
[] = { 0, 1 };
398 #define s390_breakpoint_len 2
401 s390_get_pc (struct regcache
*regcache
)
403 if (register_size (regcache
->tdesc
, 0) == 4)
406 collect_register_by_name (regcache
, "pswa", &pswa
);
407 return pswa
& 0x7fffffff;
412 collect_register_by_name (regcache
, "pswa", &pc
);
418 s390_set_pc (struct regcache
*regcache
, CORE_ADDR newpc
)
420 if (register_size (regcache
->tdesc
, 0) == 4)
423 collect_register_by_name (regcache
, "pswa", &pswa
);
424 pswa
= (pswa
& 0x80000000) | (newpc
& 0x7fffffff);
425 supply_register_by_name (regcache
, "pswa", &pswa
);
429 unsigned long pc
= newpc
;
430 supply_register_by_name (regcache
, "pswa", &pc
);
436 s390_get_hwcap (const struct target_desc
*tdesc
)
438 int wordsize
= register_size (tdesc
, 0);
439 unsigned char *data
= alloca (2 * wordsize
);
442 while ((*the_target
->read_auxv
) (offset
, data
, 2 * wordsize
) == 2 * wordsize
)
446 unsigned int *data_p
= (unsigned int *)data
;
447 if (data_p
[0] == AT_HWCAP
)
452 unsigned long *data_p
= (unsigned long *)data
;
453 if (data_p
[0] == AT_HWCAP
)
457 offset
+= 2 * wordsize
;
465 s390_check_regset (int pid
, int regset
, int regsize
)
467 gdb_byte
*buf
= alloca (regsize
);
471 iov
.iov_len
= regsize
;
473 if (ptrace (PTRACE_GETREGSET
, pid
, (long) regset
, (long) &iov
) >= 0
480 /* For a 31-bit inferior, whether the kernel supports using the full
482 static int have_hwcap_s390_high_gprs
= 0;
486 s390_arch_setup (void)
488 const struct target_desc
*tdesc
;
489 struct regset_info
*regset
;
491 /* Check whether the kernel supports extra register sets. */
492 int pid
= pid_of (current_thread
);
493 int have_regset_last_break
494 = s390_check_regset (pid
, NT_S390_LAST_BREAK
, 8);
495 int have_regset_system_call
496 = s390_check_regset (pid
, NT_S390_SYSTEM_CALL
, 4);
497 int have_regset_tdb
= s390_check_regset (pid
, NT_S390_TDB
, 256);
498 int have_regset_vxrs
= s390_check_regset (pid
, NT_S390_VXRS_LOW
, 128)
499 && s390_check_regset (pid
, NT_S390_VXRS_HIGH
, 256);
501 /* Assume 31-bit inferior process. */
502 if (have_regset_system_call
)
503 tdesc
= tdesc_s390_linux32v2
;
504 else if (have_regset_last_break
)
505 tdesc
= tdesc_s390_linux32v1
;
507 tdesc
= tdesc_s390_linux32
;
509 /* On a 64-bit host, check the low bit of the (31-bit) PSWM
510 -- if this is one, we actually have a 64-bit inferior. */
514 struct regcache
*regcache
= new_register_cache (tdesc
);
516 fetch_inferior_registers (regcache
, find_regno (tdesc
, "pswm"));
517 collect_register_by_name (regcache
, "pswm", &pswm
);
518 free_register_cache (regcache
);
524 (s390_get_hwcap (tdesc_s390x_linux64v2
) & HWCAP_S390_TE
) != 0;
525 if (have_regset_vxrs
)
527 (s390_get_hwcap (tdesc_s390x_linux64v2
) & HWCAP_S390_VX
) != 0;
529 if (have_regset_vxrs
)
530 tdesc
= (have_regset_tdb
? tdesc_s390x_tevx_linux64
:
531 tdesc_s390x_vx_linux64
);
532 else if (have_regset_tdb
)
533 tdesc
= tdesc_s390x_te_linux64
;
534 else if (have_regset_system_call
)
535 tdesc
= tdesc_s390x_linux64v2
;
536 else if (have_regset_last_break
)
537 tdesc
= tdesc_s390x_linux64v1
;
539 tdesc
= tdesc_s390x_linux64
;
542 /* For a 31-bit inferior, check whether the kernel supports
543 using the full 64-bit GPRs. */
544 else if (s390_get_hwcap (tdesc
) & HWCAP_S390_HIGH_GPRS
)
546 have_hwcap_s390_high_gprs
= 1;
548 have_regset_tdb
= (s390_get_hwcap (tdesc
) & HWCAP_S390_TE
) != 0;
549 if (have_regset_vxrs
)
550 have_regset_vxrs
= (s390_get_hwcap (tdesc
) & HWCAP_S390_VX
) != 0;
552 if (have_regset_vxrs
)
553 tdesc
= (have_regset_tdb
? tdesc_s390_tevx_linux64
:
554 tdesc_s390_vx_linux64
);
555 else if (have_regset_tdb
)
556 tdesc
= tdesc_s390_te_linux64
;
557 else if (have_regset_system_call
)
558 tdesc
= tdesc_s390_linux64v2
;
559 else if (have_regset_last_break
)
560 tdesc
= tdesc_s390_linux64v1
;
562 tdesc
= tdesc_s390_linux64
;
567 /* Update target_regsets according to available register sets. */
568 for (regset
= s390_regsets
; regset
->size
>= 0; regset
++)
569 if (regset
->get_request
== PTRACE_GETREGSET
)
570 switch (regset
->nt_type
)
572 case NT_S390_LAST_BREAK
:
573 regset
->size
= have_regset_last_break
? 8 : 0;
575 case NT_S390_SYSTEM_CALL
:
576 regset
->size
= have_regset_system_call
? 4 : 0;
579 regset
->size
= have_regset_tdb
? 256 : 0;
581 case NT_S390_VXRS_LOW
:
582 regset
->size
= have_regset_vxrs
? 128 : 0;
584 case NT_S390_VXRS_HIGH
:
585 regset
->size
= have_regset_vxrs
? 256 : 0;
591 current_process ()->tdesc
= tdesc
;
596 s390_breakpoint_at (CORE_ADDR pc
)
598 unsigned char c
[s390_breakpoint_len
];
599 read_inferior_memory (pc
, c
, s390_breakpoint_len
);
600 return memcmp (c
, s390_breakpoint
, s390_breakpoint_len
) == 0;
603 static struct usrregs_info s390_usrregs_info
=
609 static struct regsets_info s390_regsets_info
=
611 s390_regsets
, /* regsets */
613 NULL
, /* disabled_regsets */
616 static struct regs_info regs_info
=
618 NULL
, /* regset_bitmap */
624 static struct usrregs_info s390_usrregs_info_3264
=
630 static struct regsets_info s390_regsets_info_3264
=
632 s390_regsets
, /* regsets */
634 NULL
, /* disabled_regsets */
637 static struct regs_info regs_info_3264
=
639 NULL
, /* regset_bitmap */
640 &s390_usrregs_info_3264
,
641 &s390_regsets_info_3264
645 static const struct regs_info
*
646 s390_regs_info (void)
649 if (have_hwcap_s390_high_gprs
)
651 const struct target_desc
*tdesc
= current_process ()->tdesc
;
653 if (register_size (tdesc
, 0) == 4)
654 return ®s_info_3264
;
660 struct linux_target_ops the_low_target
= {
663 s390_cannot_fetch_register
,
664 s390_cannot_store_register
,
665 NULL
, /* fetch_register */
673 NULL
, /* supports_z_point_type */
678 s390_collect_ptrace_register
,
679 s390_supply_ptrace_register
,
683 initialize_low_arch (void)
685 /* Initialize the Linux target descriptions. */
687 init_registers_s390_linux32 ();
688 init_registers_s390_linux32v1 ();
689 init_registers_s390_linux32v2 ();
690 init_registers_s390_linux64 ();
691 init_registers_s390_linux64v1 ();
692 init_registers_s390_linux64v2 ();
693 init_registers_s390_te_linux64 ();
694 init_registers_s390_vx_linux64 ();
695 init_registers_s390_tevx_linux64 ();
696 init_registers_s390x_linux64 ();
697 init_registers_s390x_linux64v1 ();
698 init_registers_s390x_linux64v2 ();
699 init_registers_s390x_te_linux64 ();
700 init_registers_s390x_vx_linux64 ();
701 init_registers_s390x_tevx_linux64 ();
703 initialize_regsets_info (&s390_regsets_info
);
705 initialize_regsets_info (&s390_regsets_info_3264
);