Commit | Line | Data |
---|---|---|
5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2001-2018 Free Software Foundation, Inc. |
d0f54f9d | 3 | |
5769d3cd AC |
4 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
5 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. | |
d0f54f9d | 6 | |
5769d3cd AC |
7 | This file is part of GDB. |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
5769d3cd AC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
5769d3cd AC |
21 | |
22 | #include "defs.h" | |
3ecc0ae2 | 23 | #include "regcache.h" |
d0f54f9d | 24 | #include "inferior.h" |
10d6c8cd DJ |
25 | #include "target.h" |
26 | #include "linux-nat.h" | |
7803799a | 27 | #include "auxv.h" |
5538f557 | 28 | #include "gregset.h" |
99b7da5d | 29 | #include "regset.h" |
ca9b78ce | 30 | #include "nat/linux-ptrace.h" |
169fe0df | 31 | #include "gdbcmd.h" |
d0f54f9d | 32 | |
d6e58945 | 33 | #include "s390-tdep.h" |
0e5fae36 | 34 | #include "s390-linux-tdep.h" |
c642a434 | 35 | #include "elf/common.h" |
d0f54f9d | 36 | |
5769d3cd | 37 | #include <asm/ptrace.h> |
5826e159 | 38 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 39 | #include <asm/types.h> |
5769d3cd | 40 | #include <sys/procfs.h> |
5769d3cd | 41 | #include <sys/ucontext.h> |
7803799a | 42 | #include <elf.h> |
93689493 | 43 | #include <algorithm> |
bcc0c096 | 44 | #include "inf-ptrace.h" |
7803799a | 45 | |
18396193 AA |
46 | /* Per-thread arch-specific data. */ |
47 | ||
48 | struct arch_lwp_info | |
49 | { | |
50 | /* Non-zero if the thread's PER info must be re-written. */ | |
51 | int per_info_changed; | |
52 | }; | |
53 | ||
c642a434 UW |
54 | static int have_regset_last_break = 0; |
55 | static int have_regset_system_call = 0; | |
4ac33720 | 56 | static int have_regset_tdb = 0; |
550bdf96 | 57 | static int have_regset_vxrs = 0; |
1b63490c | 58 | static int have_regset_gs = 0; |
5769d3cd | 59 | |
99b7da5d AA |
60 | /* Register map for 32-bit executables running under a 64-bit |
61 | kernel. */ | |
d0f54f9d JB |
62 | |
63 | #ifdef __s390x__ | |
99b7da5d AA |
64 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
65 | { | |
66 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
67 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
68 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
69 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
70 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
71 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
72 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
73 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
74 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
75 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
76 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
77 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
78 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
79 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
80 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
81 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
82 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
83 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
84 | { 16, S390_A0_REGNUM, 4 }, | |
85 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
86 | { 0 } | |
87 | }; | |
88 | ||
89 | static const struct regset s390_64_gregset = | |
90 | { | |
91 | s390_64_regmap_gregset, | |
92 | regcache_supply_regset, | |
93 | regcache_collect_regset | |
94 | }; | |
95 | ||
96 | #define S390_PSWM_OFFSET 0 | |
97 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 98 | #endif |
d0f54f9d | 99 | |
8193adea AA |
100 | /* PER-event mask bits and PER control bits (CR9). */ |
101 | ||
102 | #define PER_BIT(n) (1UL << (63 - (n))) | |
103 | #define PER_EVENT_BRANCH PER_BIT (32) | |
104 | #define PER_EVENT_IFETCH PER_BIT (33) | |
105 | #define PER_EVENT_STORE PER_BIT (34) | |
106 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
107 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
108 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
109 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
110 | ||
111 | ||
2ccd1468 UW |
112 | /* Fill GDB's register array with the general-purpose register values |
113 | in *REGP. | |
114 | ||
115 | When debugging a 32-bit executable running under a 64-bit kernel, | |
116 | we have to fix up the 64-bit registers we get from the kernel to | |
117 | make them look like 32-bit registers. */ | |
d6db1fab | 118 | |
2ccd1468 UW |
119 | void |
120 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
121 | { | |
9cbd5950 | 122 | #ifdef __s390x__ |
ac7936df | 123 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 124 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
125 | { |
126 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 127 | ULONGEST pswm, pswa; |
2ccd1468 | 128 | gdb_byte buf[4]; |
d6db1fab | 129 | |
99b7da5d AA |
130 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
131 | regp, sizeof (gregset_t)); | |
132 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
133 | + S390_PSWM_OFFSET, 8, byte_order); | |
134 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
135 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
136 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
137 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
138 | store_unsigned_integer (buf, 4, byte_order, | |
139 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
140 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
141 | return; | |
d6db1fab UW |
142 | } |
143 | #endif | |
144 | ||
99b7da5d AA |
145 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
146 | sizeof (gregset_t)); | |
d6db1fab UW |
147 | } |
148 | ||
2ccd1468 UW |
149 | /* Fill register REGNO (if it is a general-purpose register) in |
150 | *REGP with the value in GDB's register array. If REGNO is -1, | |
151 | do this for all registers. */ | |
d6db1fab | 152 | |
2ccd1468 UW |
153 | void |
154 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
155 | { | |
d6db1fab | 156 | #ifdef __s390x__ |
ac7936df | 157 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 158 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 159 | { |
99b7da5d AA |
160 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
161 | regp, sizeof (gregset_t)); | |
d6db1fab | 162 | |
2ccd1468 UW |
163 | if (regno == -1 |
164 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 165 | { |
2ccd1468 UW |
166 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
167 | ULONGEST pswa, pswm; | |
d6db1fab | 168 | gdb_byte buf[4]; |
2492f0d0 AA |
169 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
170 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 171 | |
2492f0d0 | 172 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 173 | |
2ccd1468 | 174 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
175 | { |
176 | pswm &= 0x80000000; | |
177 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); | |
178 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) | |
179 | & 0xfff7ffff) << 32; | |
180 | } | |
181 | ||
2ccd1468 | 182 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 AA |
183 | { |
184 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
185 | pswa = extract_unsigned_integer (buf, 4, byte_order); | |
186 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
187 | pswa &= 0x7fffffff; | |
188 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
189 | } | |
190 | ||
191 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 192 | } |
2ccd1468 | 193 | return; |
d6db1fab | 194 | } |
9cbd5950 JB |
195 | #endif |
196 | ||
99b7da5d AA |
197 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
198 | sizeof (gregset_t)); | |
d0f54f9d JB |
199 | } |
200 | ||
201 | /* Fill GDB's register array with the floating-point register values | |
202 | in *REGP. */ | |
203 | void | |
7f7fe91e | 204 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 205 | { |
99b7da5d AA |
206 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
207 | sizeof (fpregset_t)); | |
d0f54f9d JB |
208 | } |
209 | ||
210 | /* Fill register REGNO (if it is a general-purpose register) in | |
211 | *REGP with the value in GDB's register array. If REGNO is -1, | |
212 | do this for all registers. */ | |
213 | void | |
7f7fe91e | 214 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 215 | { |
99b7da5d AA |
216 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
217 | sizeof (fpregset_t)); | |
d0f54f9d JB |
218 | } |
219 | ||
220 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
221 | static int | |
222 | s390_inferior_tid (void) | |
223 | { | |
224 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 225 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 226 | if (tid == 0) |
dfd4cc63 | 227 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
228 | |
229 | return tid; | |
230 | } | |
231 | ||
232 | /* Fetch all general-purpose registers from process/thread TID and | |
233 | store their values in GDB's register cache. */ | |
234 | static void | |
56be3814 | 235 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
236 | { |
237 | gregset_t regs; | |
238 | ptrace_area parea; | |
239 | ||
240 | parea.len = sizeof (regs); | |
241 | parea.process_addr = (addr_t) ®s; | |
242 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 243 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 244 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 245 | |
56be3814 | 246 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
247 | } |
248 | ||
249 | /* Store all valid general-purpose registers in GDB's register cache | |
250 | into the process/thread specified by TID. */ | |
251 | static void | |
56be3814 | 252 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
253 | { |
254 | gregset_t regs; | |
255 | ptrace_area parea; | |
256 | ||
257 | parea.len = sizeof (regs); | |
258 | parea.process_addr = (addr_t) ®s; | |
259 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 260 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 261 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 262 | |
56be3814 | 263 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 264 | |
2b4cab86 | 265 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 266 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
267 | } |
268 | ||
269 | /* Fetch all floating-point registers from process/thread TID and store | |
270 | their values in GDB's register cache. */ | |
271 | static void | |
56be3814 | 272 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
273 | { |
274 | fpregset_t fpregs; | |
275 | ptrace_area parea; | |
276 | ||
277 | parea.len = sizeof (fpregs); | |
278 | parea.process_addr = (addr_t) &fpregs; | |
279 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 280 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 281 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 282 | |
56be3814 | 283 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
284 | } |
285 | ||
286 | /* Store all valid floating-point registers in GDB's register cache | |
287 | into the process/thread specified by TID. */ | |
288 | static void | |
56be3814 | 289 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
290 | { |
291 | fpregset_t fpregs; | |
292 | ptrace_area parea; | |
293 | ||
294 | parea.len = sizeof (fpregs); | |
295 | parea.process_addr = (addr_t) &fpregs; | |
296 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 297 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 298 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 299 | |
56be3814 | 300 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 301 | |
2b4cab86 | 302 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 303 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
304 | } |
305 | ||
99b7da5d AA |
306 | /* Fetch all registers in the kernel's register set whose number is |
307 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
308 | REGSET, from process/thread TID and store their values in GDB's | |
309 | register cache. */ | |
c642a434 UW |
310 | static void |
311 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 312 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 313 | { |
3451269c | 314 | void *buf = alloca (regsize); |
c642a434 | 315 | struct iovec iov; |
c642a434 UW |
316 | |
317 | iov.iov_base = buf; | |
318 | iov.iov_len = regsize; | |
319 | ||
99b7da5d | 320 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
321 | { |
322 | if (errno == ENODATA) | |
99b7da5d | 323 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
324 | else |
325 | perror_with_name (_("Couldn't get register set")); | |
326 | } | |
327 | else | |
99b7da5d | 328 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
329 | } |
330 | ||
99b7da5d AA |
331 | /* Store all registers in the kernel's register set whose number is |
332 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
333 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
334 | static void |
335 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 336 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 337 | { |
3451269c | 338 | void *buf = alloca (regsize); |
c642a434 | 339 | struct iovec iov; |
c642a434 UW |
340 | |
341 | iov.iov_base = buf; | |
342 | iov.iov_len = regsize; | |
343 | ||
99b7da5d | 344 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
345 | perror_with_name (_("Couldn't get register set")); |
346 | ||
99b7da5d | 347 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 348 | |
99b7da5d | 349 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
350 | perror_with_name (_("Couldn't set register set")); |
351 | } | |
352 | ||
353 | /* Check whether the kernel provides a register set with number REGSET | |
354 | of size REGSIZE for process/thread TID. */ | |
355 | static int | |
356 | check_regset (int tid, int regset, int regsize) | |
357 | { | |
3451269c | 358 | void *buf = alloca (regsize); |
c642a434 UW |
359 | struct iovec iov; |
360 | ||
361 | iov.iov_base = buf; | |
362 | iov.iov_len = regsize; | |
363 | ||
4ac33720 UW |
364 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
365 | || errno == ENODATA) | |
c642a434 | 366 | return 1; |
4ac33720 | 367 | return 0; |
c642a434 UW |
368 | } |
369 | ||
d0f54f9d JB |
370 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
371 | this for all registers. */ | |
10d6c8cd | 372 | static void |
28439f5e PA |
373 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
374 | struct regcache *regcache, int regnum) | |
d0f54f9d | 375 | { |
bcc0c096 | 376 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
d0f54f9d | 377 | |
2ccd1468 | 378 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 379 | fetch_regs (regcache, tid); |
d0f54f9d | 380 | |
2ccd1468 | 381 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 382 | fetch_fpregs (regcache, tid); |
c642a434 UW |
383 | |
384 | if (have_regset_last_break) | |
385 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
386 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
ac7936df | 387 | (gdbarch_ptr_bit (regcache->arch ()) == 32 |
99b7da5d | 388 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
389 | |
390 | if (have_regset_system_call) | |
391 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
392 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 393 | &s390_system_call_regset); |
4ac33720 UW |
394 | |
395 | if (have_regset_tdb) | |
396 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
397 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 398 | &s390_tdb_regset); |
550bdf96 AA |
399 | |
400 | if (have_regset_vxrs) | |
401 | { | |
402 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
403 | && regnum <= S390_V15_LOWER_REGNUM)) | |
404 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
405 | &s390_vxrs_low_regset); | |
406 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
407 | && regnum <= S390_V31_REGNUM)) | |
408 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
409 | &s390_vxrs_high_regset); | |
410 | } | |
1b63490c AA |
411 | |
412 | if (have_regset_gs) | |
413 | { | |
414 | if (regnum == -1 || (regnum >= S390_GSD_REGNUM | |
415 | && regnum <= S390_GSEPLA_REGNUM)) | |
416 | fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8, | |
417 | &s390_gs_regset); | |
418 | if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM | |
419 | && regnum <= S390_BC_GSEPLA_REGNUM)) | |
420 | fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8, | |
421 | &s390_gsbc_regset); | |
422 | } | |
d0f54f9d JB |
423 | } |
424 | ||
425 | /* Store register REGNUM back into the child process. If REGNUM is | |
426 | -1, do this for all registers. */ | |
10d6c8cd | 427 | static void |
28439f5e PA |
428 | s390_linux_store_inferior_registers (struct target_ops *ops, |
429 | struct regcache *regcache, int regnum) | |
d0f54f9d | 430 | { |
bcc0c096 | 431 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
d0f54f9d | 432 | |
2ccd1468 | 433 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 434 | store_regs (regcache, tid, regnum); |
d0f54f9d | 435 | |
2ccd1468 | 436 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 437 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
438 | |
439 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
440 | ||
441 | if (have_regset_system_call) | |
442 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
443 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 444 | &s390_system_call_regset); |
550bdf96 AA |
445 | |
446 | if (have_regset_vxrs) | |
447 | { | |
448 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
449 | && regnum <= S390_V15_LOWER_REGNUM)) | |
450 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
451 | &s390_vxrs_low_regset); | |
452 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
453 | && regnum <= S390_V31_REGNUM)) | |
454 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
455 | &s390_vxrs_high_regset); | |
456 | } | |
5769d3cd AC |
457 | } |
458 | ||
d0f54f9d | 459 | |
e1457d83 JB |
460 | /* Hardware-assisted watchpoint handling. */ |
461 | ||
373c3dad AA |
462 | /* For each process we maintain a list of all currently active |
463 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
464 | |
465 | The only thing we actually need is the total address space area | |
466 | spanned by the watchpoints. */ | |
467 | ||
17c84cca | 468 | typedef struct watch_area |
5769d3cd | 469 | { |
5769d3cd AC |
470 | CORE_ADDR lo_addr; |
471 | CORE_ADDR hi_addr; | |
17c84cca AA |
472 | } s390_watch_area; |
473 | ||
474 | DEF_VEC_O (s390_watch_area); | |
5769d3cd | 475 | |
373c3dad AA |
476 | /* Hardware debug state. */ |
477 | ||
478 | struct s390_debug_reg_state | |
479 | { | |
480 | VEC_s390_watch_area *watch_areas; | |
8193adea | 481 | VEC_s390_watch_area *break_areas; |
373c3dad AA |
482 | }; |
483 | ||
484 | /* Per-process data. */ | |
485 | ||
486 | struct s390_process_info | |
487 | { | |
488 | struct s390_process_info *next; | |
489 | pid_t pid; | |
490 | struct s390_debug_reg_state state; | |
491 | }; | |
492 | ||
493 | static struct s390_process_info *s390_process_list = NULL; | |
494 | ||
495 | /* Find process data for process PID. */ | |
496 | ||
497 | static struct s390_process_info * | |
498 | s390_find_process_pid (pid_t pid) | |
499 | { | |
500 | struct s390_process_info *proc; | |
501 | ||
502 | for (proc = s390_process_list; proc; proc = proc->next) | |
503 | if (proc->pid == pid) | |
504 | return proc; | |
505 | ||
506 | return NULL; | |
507 | } | |
508 | ||
509 | /* Add process data for process PID. Returns newly allocated info | |
510 | object. */ | |
511 | ||
512 | static struct s390_process_info * | |
513 | s390_add_process (pid_t pid) | |
514 | { | |
515 | struct s390_process_info *proc = XCNEW (struct s390_process_info); | |
516 | ||
517 | proc->pid = pid; | |
518 | proc->next = s390_process_list; | |
519 | s390_process_list = proc; | |
520 | ||
521 | return proc; | |
522 | } | |
523 | ||
524 | /* Get data specific info for process PID, creating it if necessary. | |
525 | Never returns NULL. */ | |
526 | ||
527 | static struct s390_process_info * | |
528 | s390_process_info_get (pid_t pid) | |
529 | { | |
530 | struct s390_process_info *proc; | |
531 | ||
532 | proc = s390_find_process_pid (pid); | |
533 | if (proc == NULL) | |
534 | proc = s390_add_process (pid); | |
535 | ||
536 | return proc; | |
537 | } | |
538 | ||
539 | /* Get hardware debug state for process PID. */ | |
540 | ||
541 | static struct s390_debug_reg_state * | |
542 | s390_get_debug_reg_state (pid_t pid) | |
543 | { | |
544 | return &s390_process_info_get (pid)->state; | |
545 | } | |
546 | ||
547 | /* Called whenever GDB is no longer debugging process PID. It deletes | |
548 | data structures that keep track of hardware debug state. */ | |
549 | ||
550 | static void | |
551 | s390_forget_process (pid_t pid) | |
552 | { | |
553 | struct s390_process_info *proc, **proc_link; | |
554 | ||
555 | proc = s390_process_list; | |
556 | proc_link = &s390_process_list; | |
557 | ||
558 | while (proc != NULL) | |
559 | { | |
560 | if (proc->pid == pid) | |
561 | { | |
562 | VEC_free (s390_watch_area, proc->state.watch_areas); | |
8193adea | 563 | VEC_free (s390_watch_area, proc->state.break_areas); |
373c3dad AA |
564 | *proc_link = proc->next; |
565 | xfree (proc); | |
566 | return; | |
567 | } | |
568 | ||
569 | proc_link = &proc->next; | |
570 | proc = *proc_link; | |
571 | } | |
572 | } | |
573 | ||
574 | /* linux_nat_new_fork hook. */ | |
575 | ||
576 | static void | |
577 | s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid) | |
578 | { | |
579 | pid_t parent_pid; | |
580 | struct s390_debug_reg_state *parent_state; | |
581 | struct s390_debug_reg_state *child_state; | |
582 | ||
583 | /* NULL means no watchpoint has ever been set in the parent. In | |
584 | that case, there's nothing to do. */ | |
585 | if (lwp_arch_private_info (parent) == NULL) | |
586 | return; | |
587 | ||
588 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
589 | the parent. So copy the debug state from parent to child. */ | |
590 | ||
591 | parent_pid = ptid_get_pid (parent->ptid); | |
592 | parent_state = s390_get_debug_reg_state (parent_pid); | |
593 | child_state = s390_get_debug_reg_state (child_pid); | |
594 | ||
595 | child_state->watch_areas = VEC_copy (s390_watch_area, | |
596 | parent_state->watch_areas); | |
8193adea AA |
597 | child_state->break_areas = VEC_copy (s390_watch_area, |
598 | parent_state->break_areas); | |
373c3dad | 599 | } |
5769d3cd | 600 | |
169fe0df AA |
601 | /* Dump PER state. */ |
602 | ||
603 | static void | |
604 | s390_show_debug_regs (int tid, const char *where) | |
605 | { | |
606 | per_struct per_info; | |
607 | ptrace_area parea; | |
608 | ||
609 | parea.len = sizeof (per_info); | |
610 | parea.process_addr = (addr_t) &per_info; | |
611 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
612 | ||
613 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
614 | perror_with_name (_("Couldn't retrieve debug regs")); | |
615 | ||
616 | debug_printf ("PER (debug) state for %d -- %s\n" | |
617 | " cr9-11: %lx %lx %lx\n" | |
618 | " start, end: %lx %lx\n" | |
619 | " code/ATMID: %x address: %lx PAID: %x\n", | |
620 | tid, | |
621 | where, | |
622 | per_info.control_regs.words.cr[0], | |
623 | per_info.control_regs.words.cr[1], | |
624 | per_info.control_regs.words.cr[2], | |
625 | per_info.starting_addr, | |
626 | per_info.ending_addr, | |
627 | per_info.lowcore.words.perc_atmid, | |
628 | per_info.lowcore.words.address, | |
629 | per_info.lowcore.words.access_id); | |
630 | } | |
631 | ||
fd7979d1 | 632 | static int |
6a109b6b | 633 | s390_stopped_by_watchpoint (struct target_ops *ops) |
5769d3cd | 634 | { |
373c3dad AA |
635 | struct s390_debug_reg_state *state |
636 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
5769d3cd AC |
637 | per_lowcore_bits per_lowcore; |
638 | ptrace_area parea; | |
9f0bdab8 | 639 | int result; |
5769d3cd | 640 | |
169fe0df AA |
641 | if (show_debug_regs) |
642 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
643 | ||
e1457d83 | 644 | /* Speed up common case. */ |
373c3dad | 645 | if (VEC_empty (s390_watch_area, state->watch_areas)) |
e1457d83 JB |
646 | return 0; |
647 | ||
5769d3cd AC |
648 | parea.len = sizeof (per_lowcore); |
649 | parea.process_addr = (addr_t) & per_lowcore; | |
650 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 651 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 652 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 653 | |
9f0bdab8 DJ |
654 | result = (per_lowcore.perc_storage_alteration == 1 |
655 | && per_lowcore.perc_store_real_address == 0); | |
656 | ||
657 | if (result) | |
658 | { | |
659 | /* Do not report this watchpoint again. */ | |
660 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 661 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
662 | perror_with_name (_("Couldn't clear watchpoint status")); |
663 | } | |
664 | ||
665 | return result; | |
e1457d83 | 666 | } |
5769d3cd | 667 | |
18396193 AA |
668 | /* Each time before resuming a thread, update its PER info. */ |
669 | ||
e1457d83 | 670 | static void |
18396193 | 671 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 672 | { |
9f0bdab8 | 673 | int tid; |
373c3dad | 674 | pid_t pid = ptid_get_pid (ptid_of_lwp (lp)); |
e1457d83 | 675 | |
5769d3cd AC |
676 | per_struct per_info; |
677 | ptrace_area parea; | |
678 | ||
e1457d83 | 679 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
17c84cca AA |
680 | unsigned ix; |
681 | s390_watch_area *area; | |
9c2996c9 | 682 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 683 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 684 | int step = lwp_is_stepping (lp); |
e1457d83 | 685 | |
8193adea AA |
686 | /* Nothing to do if there was never any PER info for this thread. */ |
687 | if (lp_priv == NULL) | |
18396193 AA |
688 | return; |
689 | ||
8193adea AA |
690 | /* If PER info has changed, update it. When single-stepping, disable |
691 | hardware breakpoints (if any). Otherwise we're done. */ | |
692 | if (!lp_priv->per_info_changed) | |
693 | { | |
694 | if (!step || VEC_empty (s390_watch_area, state->break_areas)) | |
695 | return; | |
696 | } | |
697 | ||
9c2996c9 | 698 | lp_priv->per_info_changed = 0; |
18396193 | 699 | |
9c2996c9 | 700 | tid = ptid_get_lwp (ptid_of_lwp (lp)); |
9f0bdab8 | 701 | if (tid == 0) |
373c3dad | 702 | tid = pid; |
9f0bdab8 | 703 | |
5769d3cd AC |
704 | parea.len = sizeof (per_info); |
705 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 706 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
707 | |
708 | /* Clear PER info, but adjust the single_step field (used by older | |
709 | kernels only). */ | |
710 | memset (&per_info, 0, sizeof (per_info)); | |
711 | per_info.single_step = (step != 0); | |
e1457d83 | 712 | |
373c3dad | 713 | if (!VEC_empty (s390_watch_area, state->watch_areas)) |
5769d3cd | 714 | { |
17c84cca | 715 | for (ix = 0; |
373c3dad | 716 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca AA |
717 | ix++) |
718 | { | |
325fac50 PA |
719 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
720 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
17c84cca AA |
721 | } |
722 | ||
8193adea AA |
723 | /* Enable storage-alteration events. */ |
724 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
725 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 726 | } |
8193adea AA |
727 | |
728 | if (!VEC_empty (s390_watch_area, state->break_areas)) | |
5769d3cd | 729 | { |
8193adea AA |
730 | /* Don't install hardware breakpoints while single-stepping, since |
731 | our PER settings (e.g. the nullification bit) might then conflict | |
732 | with the kernel's. But re-install them afterwards. */ | |
733 | if (step) | |
734 | lp_priv->per_info_changed = 1; | |
735 | else | |
736 | { | |
737 | for (ix = 0; | |
738 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
739 | ix++) | |
740 | { | |
325fac50 PA |
741 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
742 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
8193adea AA |
743 | } |
744 | ||
745 | /* If there's just one breakpoint, enable instruction-fetching | |
746 | nullification events for the breakpoint address (fast). | |
747 | Otherwise stop after any instruction within the PER area and | |
748 | after any branch into it (slow). */ | |
749 | if (watch_hi_addr == watch_lo_addr) | |
750 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
751 | | PER_EVENT_IFETCH); | |
752 | else | |
753 | { | |
754 | /* The PER area must include the instruction before the | |
755 | first breakpoint address. */ | |
756 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
757 | per_info.control_regs.words.cr[0] | |
758 | |= (PER_EVENT_BRANCH | |
759 | | PER_EVENT_IFETCH | |
760 | | PER_CONTROL_BRANCH_ADDRESS); | |
761 | } | |
762 | } | |
5769d3cd AC |
763 | } |
764 | per_info.starting_addr = watch_lo_addr; | |
765 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 766 | |
2b4cab86 | 767 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 768 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
769 | |
770 | if (show_debug_regs) | |
771 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
772 | } |
773 | ||
9c2996c9 | 774 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
775 | |
776 | static void | |
9c2996c9 | 777 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 778 | { |
9c2996c9 AA |
779 | if (lwp_arch_private_info (lp) == NULL) |
780 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 781 | |
9c2996c9 | 782 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
783 | } |
784 | ||
785 | /* When attaching to a new thread, mark its PER info as changed. */ | |
786 | ||
787 | static void | |
788 | s390_new_thread (struct lwp_info *lp) | |
789 | { | |
9c2996c9 AA |
790 | s390_mark_per_info_changed (lp); |
791 | } | |
792 | ||
466eecee SM |
793 | /* Function to call when a thread is being deleted. */ |
794 | ||
795 | static void | |
796 | s390_delete_thread (struct arch_lwp_info *arch_lwp) | |
797 | { | |
798 | xfree (arch_lwp); | |
799 | } | |
800 | ||
9c2996c9 AA |
801 | /* Iterator callback for s390_refresh_per_info. */ |
802 | ||
803 | static int | |
804 | s390_refresh_per_info_cb (struct lwp_info *lp, void *arg) | |
805 | { | |
806 | s390_mark_per_info_changed (lp); | |
807 | ||
808 | if (!lwp_is_stopped (lp)) | |
809 | linux_stop_lwp (lp); | |
810 | return 0; | |
811 | } | |
812 | ||
813 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
814 | ||
815 | static int | |
816 | s390_refresh_per_info (void) | |
817 | { | |
818 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (current_lwp_ptid ())); | |
819 | ||
820 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL); | |
821 | return 0; | |
18396193 AA |
822 | } |
823 | ||
fd7979d1 | 824 | static int |
7bb99c53 | 825 | s390_insert_watchpoint (struct target_ops *self, |
f486487f | 826 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 827 | struct expression *cond) |
5769d3cd | 828 | { |
17c84cca | 829 | s390_watch_area area; |
373c3dad AA |
830 | struct s390_debug_reg_state *state |
831 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
9f0bdab8 | 832 | |
17c84cca AA |
833 | area.lo_addr = addr; |
834 | area.hi_addr = addr + len - 1; | |
373c3dad | 835 | VEC_safe_push (s390_watch_area, state->watch_areas, &area); |
e1457d83 | 836 | |
9c2996c9 | 837 | return s390_refresh_per_info (); |
5769d3cd AC |
838 | } |
839 | ||
fd7979d1 | 840 | static int |
11b5219a | 841 | s390_remove_watchpoint (struct target_ops *self, |
f486487f | 842 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 843 | struct expression *cond) |
5769d3cd | 844 | { |
17c84cca AA |
845 | unsigned ix; |
846 | s390_watch_area *area; | |
373c3dad AA |
847 | struct s390_debug_reg_state *state |
848 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
e1457d83 | 849 | |
17c84cca | 850 | for (ix = 0; |
373c3dad | 851 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca | 852 | ix++) |
5769d3cd | 853 | { |
17c84cca AA |
854 | if (area->lo_addr == addr && area->hi_addr == addr + len - 1) |
855 | { | |
373c3dad | 856 | VEC_unordered_remove (s390_watch_area, state->watch_areas, ix); |
17c84cca AA |
857 | return s390_refresh_per_info (); |
858 | } | |
5769d3cd | 859 | } |
e1457d83 | 860 | |
17c84cca AA |
861 | fprintf_unfiltered (gdb_stderr, |
862 | "Attempt to remove nonexistent watchpoint.\n"); | |
863 | return -1; | |
5769d3cd AC |
864 | } |
865 | ||
8193adea AA |
866 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
867 | ||
fd7979d1 | 868 | static int |
5461485a | 869 | s390_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 870 | enum bptype type, int cnt, int othertype) |
fd7979d1 | 871 | { |
8193adea AA |
872 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
873 | return 1; | |
874 | return 0; | |
875 | } | |
876 | ||
877 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
878 | ||
879 | static int | |
880 | s390_insert_hw_breakpoint (struct target_ops *self, | |
881 | struct gdbarch *gdbarch, | |
882 | struct bp_target_info *bp_tgt) | |
883 | { | |
884 | s390_watch_area area; | |
885 | struct s390_debug_reg_state *state; | |
886 | ||
887 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
888 | area.hi_addr = area.lo_addr; | |
889 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
890 | VEC_safe_push (s390_watch_area, state->break_areas, &area); | |
891 | ||
892 | return s390_refresh_per_info (); | |
893 | } | |
894 | ||
895 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
896 | ||
897 | static int | |
898 | s390_remove_hw_breakpoint (struct target_ops *self, | |
899 | struct gdbarch *gdbarch, | |
900 | struct bp_target_info *bp_tgt) | |
901 | { | |
902 | unsigned ix; | |
903 | struct watch_area *area; | |
904 | struct s390_debug_reg_state *state; | |
905 | ||
906 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
907 | for (ix = 0; | |
908 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
909 | ix++) | |
910 | { | |
911 | if (area->lo_addr == bp_tgt->placed_address) | |
912 | { | |
913 | VEC_unordered_remove (s390_watch_area, state->break_areas, ix); | |
914 | return s390_refresh_per_info (); | |
915 | } | |
916 | } | |
917 | ||
918 | fprintf_unfiltered (gdb_stderr, | |
919 | "Attempt to remove nonexistent breakpoint.\n"); | |
920 | return -1; | |
fd7979d1 | 921 | } |
e1457d83 | 922 | |
fd7979d1 | 923 | static int |
31568a15 TT |
924 | s390_region_ok_for_hw_watchpoint (struct target_ops *self, |
925 | CORE_ADDR addr, int cnt) | |
5769d3cd | 926 | { |
fd7979d1 | 927 | return 1; |
5769d3cd AC |
928 | } |
929 | ||
7803799a UW |
930 | static int |
931 | s390_target_wordsize (void) | |
932 | { | |
933 | int wordsize = 4; | |
934 | ||
935 | /* Check for 64-bit inferior process. This is the case when the host is | |
936 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
937 | #ifdef __s390x__ | |
938 | long pswm; | |
939 | ||
940 | errno = 0; | |
941 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
942 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
943 | wordsize = 8; | |
944 | #endif | |
945 | ||
946 | return wordsize; | |
947 | } | |
948 | ||
949 | static int | |
950 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
951 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
952 | { | |
953 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 954 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
955 | gdb_byte *ptr = *readptr; |
956 | ||
957 | if (endptr == ptr) | |
958 | return 0; | |
959 | ||
960 | if (endptr - ptr < sizeof_auxv_field * 2) | |
961 | return -1; | |
962 | ||
963 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
964 | ptr += sizeof_auxv_field; | |
965 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
966 | ptr += sizeof_auxv_field; | |
967 | ||
968 | *readptr = ptr; | |
969 | return 1; | |
970 | } | |
971 | ||
7803799a UW |
972 | static const struct target_desc * |
973 | s390_read_description (struct target_ops *ops) | |
974 | { | |
c642a434 UW |
975 | int tid = s390_inferior_tid (); |
976 | ||
977 | have_regset_last_break | |
978 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
979 | have_regset_system_call | |
980 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
981 | ||
7803799a UW |
982 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
983 | z/Architecture mode. If the target is running in 64-bit addressing | |
984 | mode, report s390x architecture. If the target is running in 31-bit | |
985 | addressing mode, but the kernel supports using 64-bit registers in | |
986 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
987 | #ifdef __s390x__ |
988 | { | |
989 | CORE_ADDR hwcap = 0; | |
990 | ||
991 | target_auxv_search (¤t_target, AT_HWCAP, &hwcap); | |
992 | have_regset_tdb = (hwcap & HWCAP_S390_TE) | |
993 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
994 | ||
995 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
996 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
997 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
998 | ||
1b63490c AA |
999 | have_regset_gs = (hwcap & HWCAP_S390_GS) |
1000 | && check_regset (tid, NT_S390_GS_CB, 4 * 8) | |
1001 | && check_regset (tid, NT_S390_GS_BC, 4 * 8); | |
1002 | ||
550bdf96 | 1003 | if (s390_target_wordsize () == 8) |
1b63490c AA |
1004 | return (have_regset_gs ? tdesc_s390x_gs_linux64 : |
1005 | have_regset_vxrs ? | |
550bdf96 AA |
1006 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
1007 | tdesc_s390x_vx_linux64) : | |
1008 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
1009 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
1010 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
1011 | tdesc_s390x_linux64); | |
1012 | ||
1013 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
1b63490c AA |
1014 | return (have_regset_gs ? tdesc_s390_gs_linux64 : |
1015 | have_regset_vxrs ? | |
550bdf96 AA |
1016 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
1017 | tdesc_s390_vx_linux64) : | |
1018 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
1019 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
1020 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
1021 | tdesc_s390_linux64); | |
1022 | } | |
7803799a UW |
1023 | #endif |
1024 | ||
1025 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
1026 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
1027 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
1028 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
1029 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1030 | tdesc_s390_linux32); | |
7803799a | 1031 | } |
fd7979d1 | 1032 | |
10d6c8cd DJ |
1033 | void |
1034 | _initialize_s390_nat (void) | |
1035 | { | |
1036 | struct target_ops *t; | |
1037 | ||
1038 | /* Fill in the generic GNU/Linux methods. */ | |
1039 | t = linux_target (); | |
1040 | ||
1041 | /* Add our register access methods. */ | |
1042 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
1043 | t->to_store_registers = s390_linux_store_inferior_registers; | |
1044 | ||
fd7979d1 UW |
1045 | /* Add our watchpoint methods. */ |
1046 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
8193adea AA |
1047 | t->to_insert_hw_breakpoint = s390_insert_hw_breakpoint; |
1048 | t->to_remove_hw_breakpoint = s390_remove_hw_breakpoint; | |
2a3cdf79 | 1049 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
1050 | t->to_have_continuable_watchpoint = 1; |
1051 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
1052 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
1053 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
1054 | ||
7803799a UW |
1055 | /* Detect target architecture. */ |
1056 | t->to_read_description = s390_read_description; | |
1057 | t->to_auxv_parse = s390_auxv_parse; | |
1058 | ||
10d6c8cd | 1059 | /* Register the target. */ |
f973ed9c | 1060 | linux_nat_add_target (t); |
18396193 | 1061 | linux_nat_set_new_thread (t, s390_new_thread); |
466eecee | 1062 | linux_nat_set_delete_thread (t, s390_delete_thread); |
18396193 | 1063 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); |
373c3dad AA |
1064 | linux_nat_set_forget_process (t, s390_forget_process); |
1065 | linux_nat_set_new_fork (t, s390_linux_new_fork); | |
169fe0df AA |
1066 | |
1067 | /* A maintenance command to enable showing the PER state. */ | |
1068 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1069 | &show_debug_regs, _("\ | |
1070 | Set whether to show the PER (debug) hardware state."), _("\ | |
1071 | Show whether to show the PER (debug) hardware state."), _("\ | |
1072 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1073 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1074 | and when the inferior triggers a breakpoint or watchpoint."), | |
1075 | NULL, | |
1076 | NULL, | |
1077 | &maintenance_set_cmdlist, | |
1078 | &maintenance_show_cmdlist); | |
10d6c8cd | 1079 | } |