Commit | Line | Data |
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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
61baf725 | 2 | Copyright (C) 2001-2017 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 | |
0e5fae36 | 33 | #include "s390-linux-tdep.h" |
c642a434 | 34 | #include "elf/common.h" |
d0f54f9d | 35 | |
5769d3cd | 36 | #include <asm/ptrace.h> |
5826e159 | 37 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 38 | #include <asm/types.h> |
5769d3cd | 39 | #include <sys/procfs.h> |
5769d3cd | 40 | #include <sys/ucontext.h> |
7803799a | 41 | #include <elf.h> |
93689493 | 42 | #include <algorithm> |
7803799a | 43 | |
18396193 AA |
44 | /* Per-thread arch-specific data. */ |
45 | ||
46 | struct arch_lwp_info | |
47 | { | |
48 | /* Non-zero if the thread's PER info must be re-written. */ | |
49 | int per_info_changed; | |
50 | }; | |
51 | ||
c642a434 UW |
52 | static int have_regset_last_break = 0; |
53 | static int have_regset_system_call = 0; | |
4ac33720 | 54 | static int have_regset_tdb = 0; |
550bdf96 | 55 | static int have_regset_vxrs = 0; |
5769d3cd | 56 | |
99b7da5d AA |
57 | /* Register map for 32-bit executables running under a 64-bit |
58 | kernel. */ | |
d0f54f9d JB |
59 | |
60 | #ifdef __s390x__ | |
99b7da5d AA |
61 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
62 | { | |
63 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
64 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
65 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
66 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
67 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
68 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
69 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
70 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
71 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
72 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
73 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
74 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
75 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
76 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
77 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
78 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
79 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
80 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
81 | { 16, S390_A0_REGNUM, 4 }, | |
82 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
83 | { 0 } | |
84 | }; | |
85 | ||
86 | static const struct regset s390_64_gregset = | |
87 | { | |
88 | s390_64_regmap_gregset, | |
89 | regcache_supply_regset, | |
90 | regcache_collect_regset | |
91 | }; | |
92 | ||
93 | #define S390_PSWM_OFFSET 0 | |
94 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 95 | #endif |
d0f54f9d | 96 | |
8193adea AA |
97 | /* PER-event mask bits and PER control bits (CR9). */ |
98 | ||
99 | #define PER_BIT(n) (1UL << (63 - (n))) | |
100 | #define PER_EVENT_BRANCH PER_BIT (32) | |
101 | #define PER_EVENT_IFETCH PER_BIT (33) | |
102 | #define PER_EVENT_STORE PER_BIT (34) | |
103 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
104 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
105 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
106 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
107 | ||
108 | ||
2ccd1468 UW |
109 | /* Fill GDB's register array with the general-purpose register values |
110 | in *REGP. | |
111 | ||
112 | When debugging a 32-bit executable running under a 64-bit kernel, | |
113 | we have to fix up the 64-bit registers we get from the kernel to | |
114 | make them look like 32-bit registers. */ | |
d6db1fab | 115 | |
2ccd1468 UW |
116 | void |
117 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
118 | { | |
9cbd5950 | 119 | #ifdef __s390x__ |
d6db1fab | 120 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
2ccd1468 | 121 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
122 | { |
123 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 124 | ULONGEST pswm, pswa; |
2ccd1468 | 125 | gdb_byte buf[4]; |
d6db1fab | 126 | |
99b7da5d AA |
127 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
128 | regp, sizeof (gregset_t)); | |
129 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
130 | + S390_PSWM_OFFSET, 8, byte_order); | |
131 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
132 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
133 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
134 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
135 | store_unsigned_integer (buf, 4, byte_order, | |
136 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
137 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
138 | return; | |
d6db1fab UW |
139 | } |
140 | #endif | |
141 | ||
99b7da5d AA |
142 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
143 | sizeof (gregset_t)); | |
d6db1fab UW |
144 | } |
145 | ||
2ccd1468 UW |
146 | /* Fill register REGNO (if it is a general-purpose register) in |
147 | *REGP with the value in GDB's register array. If REGNO is -1, | |
148 | do this for all registers. */ | |
d6db1fab | 149 | |
2ccd1468 UW |
150 | void |
151 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
152 | { | |
d6db1fab UW |
153 | #ifdef __s390x__ |
154 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2ccd1468 | 155 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 156 | { |
99b7da5d AA |
157 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
158 | regp, sizeof (gregset_t)); | |
d6db1fab | 159 | |
2ccd1468 UW |
160 | if (regno == -1 |
161 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 162 | { |
2ccd1468 UW |
163 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
164 | ULONGEST pswa, pswm; | |
d6db1fab | 165 | gdb_byte buf[4]; |
2492f0d0 AA |
166 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
167 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 168 | |
2492f0d0 | 169 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 170 | |
2ccd1468 | 171 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
172 | { |
173 | pswm &= 0x80000000; | |
174 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); | |
175 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) | |
176 | & 0xfff7ffff) << 32; | |
177 | } | |
178 | ||
2ccd1468 | 179 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 AA |
180 | { |
181 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
182 | pswa = extract_unsigned_integer (buf, 4, byte_order); | |
183 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
184 | pswa &= 0x7fffffff; | |
185 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
186 | } | |
187 | ||
188 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 189 | } |
2ccd1468 | 190 | return; |
d6db1fab | 191 | } |
9cbd5950 JB |
192 | #endif |
193 | ||
99b7da5d AA |
194 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
195 | sizeof (gregset_t)); | |
d0f54f9d JB |
196 | } |
197 | ||
198 | /* Fill GDB's register array with the floating-point register values | |
199 | in *REGP. */ | |
200 | void | |
7f7fe91e | 201 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 202 | { |
99b7da5d AA |
203 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
204 | sizeof (fpregset_t)); | |
d0f54f9d JB |
205 | } |
206 | ||
207 | /* Fill register REGNO (if it is a general-purpose register) in | |
208 | *REGP with the value in GDB's register array. If REGNO is -1, | |
209 | do this for all registers. */ | |
210 | void | |
7f7fe91e | 211 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 212 | { |
99b7da5d AA |
213 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
214 | sizeof (fpregset_t)); | |
d0f54f9d JB |
215 | } |
216 | ||
217 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
218 | static int | |
219 | s390_inferior_tid (void) | |
220 | { | |
221 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 222 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 223 | if (tid == 0) |
dfd4cc63 | 224 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
225 | |
226 | return tid; | |
227 | } | |
228 | ||
229 | /* Fetch all general-purpose registers from process/thread TID and | |
230 | store their values in GDB's register cache. */ | |
231 | static void | |
56be3814 | 232 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
233 | { |
234 | gregset_t regs; | |
235 | ptrace_area parea; | |
236 | ||
237 | parea.len = sizeof (regs); | |
238 | parea.process_addr = (addr_t) ®s; | |
239 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 240 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 241 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 242 | |
56be3814 | 243 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
244 | } |
245 | ||
246 | /* Store all valid general-purpose registers in GDB's register cache | |
247 | into the process/thread specified by TID. */ | |
248 | static void | |
56be3814 | 249 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
250 | { |
251 | gregset_t regs; | |
252 | ptrace_area parea; | |
253 | ||
254 | parea.len = sizeof (regs); | |
255 | parea.process_addr = (addr_t) ®s; | |
256 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 257 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 258 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 259 | |
56be3814 | 260 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 261 | |
2b4cab86 | 262 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 263 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
264 | } |
265 | ||
266 | /* Fetch all floating-point registers from process/thread TID and store | |
267 | their values in GDB's register cache. */ | |
268 | static void | |
56be3814 | 269 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
270 | { |
271 | fpregset_t fpregs; | |
272 | ptrace_area parea; | |
273 | ||
274 | parea.len = sizeof (fpregs); | |
275 | parea.process_addr = (addr_t) &fpregs; | |
276 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 277 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 278 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 279 | |
56be3814 | 280 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
281 | } |
282 | ||
283 | /* Store all valid floating-point registers in GDB's register cache | |
284 | into the process/thread specified by TID. */ | |
285 | static void | |
56be3814 | 286 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
287 | { |
288 | fpregset_t fpregs; | |
289 | ptrace_area parea; | |
290 | ||
291 | parea.len = sizeof (fpregs); | |
292 | parea.process_addr = (addr_t) &fpregs; | |
293 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 294 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 295 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 296 | |
56be3814 | 297 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 298 | |
2b4cab86 | 299 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 300 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
301 | } |
302 | ||
99b7da5d AA |
303 | /* Fetch all registers in the kernel's register set whose number is |
304 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
305 | REGSET, from process/thread TID and store their values in GDB's | |
306 | register cache. */ | |
c642a434 UW |
307 | static void |
308 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 309 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 310 | { |
3451269c | 311 | void *buf = alloca (regsize); |
c642a434 | 312 | struct iovec iov; |
c642a434 UW |
313 | |
314 | iov.iov_base = buf; | |
315 | iov.iov_len = regsize; | |
316 | ||
99b7da5d | 317 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
318 | { |
319 | if (errno == ENODATA) | |
99b7da5d | 320 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
321 | else |
322 | perror_with_name (_("Couldn't get register set")); | |
323 | } | |
324 | else | |
99b7da5d | 325 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
326 | } |
327 | ||
99b7da5d AA |
328 | /* Store all registers in the kernel's register set whose number is |
329 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
330 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
331 | static void |
332 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 333 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 334 | { |
3451269c | 335 | void *buf = alloca (regsize); |
c642a434 | 336 | struct iovec iov; |
c642a434 UW |
337 | |
338 | iov.iov_base = buf; | |
339 | iov.iov_len = regsize; | |
340 | ||
99b7da5d | 341 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
342 | perror_with_name (_("Couldn't get register set")); |
343 | ||
99b7da5d | 344 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 345 | |
99b7da5d | 346 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
347 | perror_with_name (_("Couldn't set register set")); |
348 | } | |
349 | ||
350 | /* Check whether the kernel provides a register set with number REGSET | |
351 | of size REGSIZE for process/thread TID. */ | |
352 | static int | |
353 | check_regset (int tid, int regset, int regsize) | |
354 | { | |
3451269c | 355 | void *buf = alloca (regsize); |
c642a434 UW |
356 | struct iovec iov; |
357 | ||
358 | iov.iov_base = buf; | |
359 | iov.iov_len = regsize; | |
360 | ||
4ac33720 UW |
361 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
362 | || errno == ENODATA) | |
c642a434 | 363 | return 1; |
4ac33720 | 364 | return 0; |
c642a434 UW |
365 | } |
366 | ||
d0f54f9d JB |
367 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
368 | this for all registers. */ | |
10d6c8cd | 369 | static void |
28439f5e PA |
370 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
371 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
372 | { |
373 | int tid = s390_inferior_tid (); | |
374 | ||
2ccd1468 | 375 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 376 | fetch_regs (regcache, tid); |
d0f54f9d | 377 | |
2ccd1468 | 378 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 379 | fetch_fpregs (regcache, tid); |
c642a434 UW |
380 | |
381 | if (have_regset_last_break) | |
382 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
383 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
384 | (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32 | |
99b7da5d | 385 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
386 | |
387 | if (have_regset_system_call) | |
388 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
389 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 390 | &s390_system_call_regset); |
4ac33720 UW |
391 | |
392 | if (have_regset_tdb) | |
393 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
394 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 395 | &s390_tdb_regset); |
550bdf96 AA |
396 | |
397 | if (have_regset_vxrs) | |
398 | { | |
399 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
400 | && regnum <= S390_V15_LOWER_REGNUM)) | |
401 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
402 | &s390_vxrs_low_regset); | |
403 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
404 | && regnum <= S390_V31_REGNUM)) | |
405 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
406 | &s390_vxrs_high_regset); | |
407 | } | |
d0f54f9d JB |
408 | } |
409 | ||
410 | /* Store register REGNUM back into the child process. If REGNUM is | |
411 | -1, do this for all registers. */ | |
10d6c8cd | 412 | static void |
28439f5e PA |
413 | s390_linux_store_inferior_registers (struct target_ops *ops, |
414 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
415 | { |
416 | int tid = s390_inferior_tid (); | |
417 | ||
2ccd1468 | 418 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 419 | store_regs (regcache, tid, regnum); |
d0f54f9d | 420 | |
2ccd1468 | 421 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 422 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
423 | |
424 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
425 | ||
426 | if (have_regset_system_call) | |
427 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
428 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 429 | &s390_system_call_regset); |
550bdf96 AA |
430 | |
431 | if (have_regset_vxrs) | |
432 | { | |
433 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
434 | && regnum <= S390_V15_LOWER_REGNUM)) | |
435 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
436 | &s390_vxrs_low_regset); | |
437 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
438 | && regnum <= S390_V31_REGNUM)) | |
439 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
440 | &s390_vxrs_high_regset); | |
441 | } | |
5769d3cd AC |
442 | } |
443 | ||
d0f54f9d | 444 | |
e1457d83 JB |
445 | /* Hardware-assisted watchpoint handling. */ |
446 | ||
373c3dad AA |
447 | /* For each process we maintain a list of all currently active |
448 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
449 | |
450 | The only thing we actually need is the total address space area | |
451 | spanned by the watchpoints. */ | |
452 | ||
17c84cca | 453 | typedef struct watch_area |
5769d3cd | 454 | { |
5769d3cd AC |
455 | CORE_ADDR lo_addr; |
456 | CORE_ADDR hi_addr; | |
17c84cca AA |
457 | } s390_watch_area; |
458 | ||
459 | DEF_VEC_O (s390_watch_area); | |
5769d3cd | 460 | |
373c3dad AA |
461 | /* Hardware debug state. */ |
462 | ||
463 | struct s390_debug_reg_state | |
464 | { | |
465 | VEC_s390_watch_area *watch_areas; | |
8193adea | 466 | VEC_s390_watch_area *break_areas; |
373c3dad AA |
467 | }; |
468 | ||
469 | /* Per-process data. */ | |
470 | ||
471 | struct s390_process_info | |
472 | { | |
473 | struct s390_process_info *next; | |
474 | pid_t pid; | |
475 | struct s390_debug_reg_state state; | |
476 | }; | |
477 | ||
478 | static struct s390_process_info *s390_process_list = NULL; | |
479 | ||
480 | /* Find process data for process PID. */ | |
481 | ||
482 | static struct s390_process_info * | |
483 | s390_find_process_pid (pid_t pid) | |
484 | { | |
485 | struct s390_process_info *proc; | |
486 | ||
487 | for (proc = s390_process_list; proc; proc = proc->next) | |
488 | if (proc->pid == pid) | |
489 | return proc; | |
490 | ||
491 | return NULL; | |
492 | } | |
493 | ||
494 | /* Add process data for process PID. Returns newly allocated info | |
495 | object. */ | |
496 | ||
497 | static struct s390_process_info * | |
498 | s390_add_process (pid_t pid) | |
499 | { | |
500 | struct s390_process_info *proc = XCNEW (struct s390_process_info); | |
501 | ||
502 | proc->pid = pid; | |
503 | proc->next = s390_process_list; | |
504 | s390_process_list = proc; | |
505 | ||
506 | return proc; | |
507 | } | |
508 | ||
509 | /* Get data specific info for process PID, creating it if necessary. | |
510 | Never returns NULL. */ | |
511 | ||
512 | static struct s390_process_info * | |
513 | s390_process_info_get (pid_t pid) | |
514 | { | |
515 | struct s390_process_info *proc; | |
516 | ||
517 | proc = s390_find_process_pid (pid); | |
518 | if (proc == NULL) | |
519 | proc = s390_add_process (pid); | |
520 | ||
521 | return proc; | |
522 | } | |
523 | ||
524 | /* Get hardware debug state for process PID. */ | |
525 | ||
526 | static struct s390_debug_reg_state * | |
527 | s390_get_debug_reg_state (pid_t pid) | |
528 | { | |
529 | return &s390_process_info_get (pid)->state; | |
530 | } | |
531 | ||
532 | /* Called whenever GDB is no longer debugging process PID. It deletes | |
533 | data structures that keep track of hardware debug state. */ | |
534 | ||
535 | static void | |
536 | s390_forget_process (pid_t pid) | |
537 | { | |
538 | struct s390_process_info *proc, **proc_link; | |
539 | ||
540 | proc = s390_process_list; | |
541 | proc_link = &s390_process_list; | |
542 | ||
543 | while (proc != NULL) | |
544 | { | |
545 | if (proc->pid == pid) | |
546 | { | |
547 | VEC_free (s390_watch_area, proc->state.watch_areas); | |
8193adea | 548 | VEC_free (s390_watch_area, proc->state.break_areas); |
373c3dad AA |
549 | *proc_link = proc->next; |
550 | xfree (proc); | |
551 | return; | |
552 | } | |
553 | ||
554 | proc_link = &proc->next; | |
555 | proc = *proc_link; | |
556 | } | |
557 | } | |
558 | ||
559 | /* linux_nat_new_fork hook. */ | |
560 | ||
561 | static void | |
562 | s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid) | |
563 | { | |
564 | pid_t parent_pid; | |
565 | struct s390_debug_reg_state *parent_state; | |
566 | struct s390_debug_reg_state *child_state; | |
567 | ||
568 | /* NULL means no watchpoint has ever been set in the parent. In | |
569 | that case, there's nothing to do. */ | |
570 | if (lwp_arch_private_info (parent) == NULL) | |
571 | return; | |
572 | ||
573 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
574 | the parent. So copy the debug state from parent to child. */ | |
575 | ||
576 | parent_pid = ptid_get_pid (parent->ptid); | |
577 | parent_state = s390_get_debug_reg_state (parent_pid); | |
578 | child_state = s390_get_debug_reg_state (child_pid); | |
579 | ||
580 | child_state->watch_areas = VEC_copy (s390_watch_area, | |
581 | parent_state->watch_areas); | |
8193adea AA |
582 | child_state->break_areas = VEC_copy (s390_watch_area, |
583 | parent_state->break_areas); | |
373c3dad | 584 | } |
5769d3cd | 585 | |
169fe0df AA |
586 | /* Dump PER state. */ |
587 | ||
588 | static void | |
589 | s390_show_debug_regs (int tid, const char *where) | |
590 | { | |
591 | per_struct per_info; | |
592 | ptrace_area parea; | |
593 | ||
594 | parea.len = sizeof (per_info); | |
595 | parea.process_addr = (addr_t) &per_info; | |
596 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
597 | ||
598 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
599 | perror_with_name (_("Couldn't retrieve debug regs")); | |
600 | ||
601 | debug_printf ("PER (debug) state for %d -- %s\n" | |
602 | " cr9-11: %lx %lx %lx\n" | |
603 | " start, end: %lx %lx\n" | |
604 | " code/ATMID: %x address: %lx PAID: %x\n", | |
605 | tid, | |
606 | where, | |
607 | per_info.control_regs.words.cr[0], | |
608 | per_info.control_regs.words.cr[1], | |
609 | per_info.control_regs.words.cr[2], | |
610 | per_info.starting_addr, | |
611 | per_info.ending_addr, | |
612 | per_info.lowcore.words.perc_atmid, | |
613 | per_info.lowcore.words.address, | |
614 | per_info.lowcore.words.access_id); | |
615 | } | |
616 | ||
fd7979d1 | 617 | static int |
6a109b6b | 618 | s390_stopped_by_watchpoint (struct target_ops *ops) |
5769d3cd | 619 | { |
373c3dad AA |
620 | struct s390_debug_reg_state *state |
621 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
5769d3cd AC |
622 | per_lowcore_bits per_lowcore; |
623 | ptrace_area parea; | |
9f0bdab8 | 624 | int result; |
5769d3cd | 625 | |
169fe0df AA |
626 | if (show_debug_regs) |
627 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
628 | ||
e1457d83 | 629 | /* Speed up common case. */ |
373c3dad | 630 | if (VEC_empty (s390_watch_area, state->watch_areas)) |
e1457d83 JB |
631 | return 0; |
632 | ||
5769d3cd AC |
633 | parea.len = sizeof (per_lowcore); |
634 | parea.process_addr = (addr_t) & per_lowcore; | |
635 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 636 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 637 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 638 | |
9f0bdab8 DJ |
639 | result = (per_lowcore.perc_storage_alteration == 1 |
640 | && per_lowcore.perc_store_real_address == 0); | |
641 | ||
642 | if (result) | |
643 | { | |
644 | /* Do not report this watchpoint again. */ | |
645 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 646 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
647 | perror_with_name (_("Couldn't clear watchpoint status")); |
648 | } | |
649 | ||
650 | return result; | |
e1457d83 | 651 | } |
5769d3cd | 652 | |
18396193 AA |
653 | /* Each time before resuming a thread, update its PER info. */ |
654 | ||
e1457d83 | 655 | static void |
18396193 | 656 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 657 | { |
9f0bdab8 | 658 | int tid; |
373c3dad | 659 | pid_t pid = ptid_get_pid (ptid_of_lwp (lp)); |
e1457d83 | 660 | |
5769d3cd AC |
661 | per_struct per_info; |
662 | ptrace_area parea; | |
663 | ||
e1457d83 | 664 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
17c84cca AA |
665 | unsigned ix; |
666 | s390_watch_area *area; | |
9c2996c9 | 667 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 668 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 669 | int step = lwp_is_stepping (lp); |
e1457d83 | 670 | |
8193adea AA |
671 | /* Nothing to do if there was never any PER info for this thread. */ |
672 | if (lp_priv == NULL) | |
18396193 AA |
673 | return; |
674 | ||
8193adea AA |
675 | /* If PER info has changed, update it. When single-stepping, disable |
676 | hardware breakpoints (if any). Otherwise we're done. */ | |
677 | if (!lp_priv->per_info_changed) | |
678 | { | |
679 | if (!step || VEC_empty (s390_watch_area, state->break_areas)) | |
680 | return; | |
681 | } | |
682 | ||
9c2996c9 | 683 | lp_priv->per_info_changed = 0; |
18396193 | 684 | |
9c2996c9 | 685 | tid = ptid_get_lwp (ptid_of_lwp (lp)); |
9f0bdab8 | 686 | if (tid == 0) |
373c3dad | 687 | tid = pid; |
9f0bdab8 | 688 | |
5769d3cd AC |
689 | parea.len = sizeof (per_info); |
690 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 691 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
692 | |
693 | /* Clear PER info, but adjust the single_step field (used by older | |
694 | kernels only). */ | |
695 | memset (&per_info, 0, sizeof (per_info)); | |
696 | per_info.single_step = (step != 0); | |
e1457d83 | 697 | |
373c3dad | 698 | if (!VEC_empty (s390_watch_area, state->watch_areas)) |
5769d3cd | 699 | { |
17c84cca | 700 | for (ix = 0; |
373c3dad | 701 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca AA |
702 | ix++) |
703 | { | |
325fac50 PA |
704 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
705 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
17c84cca AA |
706 | } |
707 | ||
8193adea AA |
708 | /* Enable storage-alteration events. */ |
709 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
710 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 711 | } |
8193adea AA |
712 | |
713 | if (!VEC_empty (s390_watch_area, state->break_areas)) | |
5769d3cd | 714 | { |
8193adea AA |
715 | /* Don't install hardware breakpoints while single-stepping, since |
716 | our PER settings (e.g. the nullification bit) might then conflict | |
717 | with the kernel's. But re-install them afterwards. */ | |
718 | if (step) | |
719 | lp_priv->per_info_changed = 1; | |
720 | else | |
721 | { | |
722 | for (ix = 0; | |
723 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
724 | ix++) | |
725 | { | |
325fac50 PA |
726 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
727 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
8193adea AA |
728 | } |
729 | ||
730 | /* If there's just one breakpoint, enable instruction-fetching | |
731 | nullification events for the breakpoint address (fast). | |
732 | Otherwise stop after any instruction within the PER area and | |
733 | after any branch into it (slow). */ | |
734 | if (watch_hi_addr == watch_lo_addr) | |
735 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
736 | | PER_EVENT_IFETCH); | |
737 | else | |
738 | { | |
739 | /* The PER area must include the instruction before the | |
740 | first breakpoint address. */ | |
741 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
742 | per_info.control_regs.words.cr[0] | |
743 | |= (PER_EVENT_BRANCH | |
744 | | PER_EVENT_IFETCH | |
745 | | PER_CONTROL_BRANCH_ADDRESS); | |
746 | } | |
747 | } | |
5769d3cd AC |
748 | } |
749 | per_info.starting_addr = watch_lo_addr; | |
750 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 751 | |
2b4cab86 | 752 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 753 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
754 | |
755 | if (show_debug_regs) | |
756 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
757 | } |
758 | ||
9c2996c9 | 759 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
760 | |
761 | static void | |
9c2996c9 | 762 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 763 | { |
9c2996c9 AA |
764 | if (lwp_arch_private_info (lp) == NULL) |
765 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 766 | |
9c2996c9 | 767 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
768 | } |
769 | ||
770 | /* When attaching to a new thread, mark its PER info as changed. */ | |
771 | ||
772 | static void | |
773 | s390_new_thread (struct lwp_info *lp) | |
774 | { | |
9c2996c9 AA |
775 | s390_mark_per_info_changed (lp); |
776 | } | |
777 | ||
778 | /* Iterator callback for s390_refresh_per_info. */ | |
779 | ||
780 | static int | |
781 | s390_refresh_per_info_cb (struct lwp_info *lp, void *arg) | |
782 | { | |
783 | s390_mark_per_info_changed (lp); | |
784 | ||
785 | if (!lwp_is_stopped (lp)) | |
786 | linux_stop_lwp (lp); | |
787 | return 0; | |
788 | } | |
789 | ||
790 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
791 | ||
792 | static int | |
793 | s390_refresh_per_info (void) | |
794 | { | |
795 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (current_lwp_ptid ())); | |
796 | ||
797 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL); | |
798 | return 0; | |
18396193 AA |
799 | } |
800 | ||
fd7979d1 | 801 | static int |
7bb99c53 | 802 | s390_insert_watchpoint (struct target_ops *self, |
f486487f | 803 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 804 | struct expression *cond) |
5769d3cd | 805 | { |
17c84cca | 806 | s390_watch_area area; |
373c3dad AA |
807 | struct s390_debug_reg_state *state |
808 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
9f0bdab8 | 809 | |
17c84cca AA |
810 | area.lo_addr = addr; |
811 | area.hi_addr = addr + len - 1; | |
373c3dad | 812 | VEC_safe_push (s390_watch_area, state->watch_areas, &area); |
e1457d83 | 813 | |
9c2996c9 | 814 | return s390_refresh_per_info (); |
5769d3cd AC |
815 | } |
816 | ||
fd7979d1 | 817 | static int |
11b5219a | 818 | s390_remove_watchpoint (struct target_ops *self, |
f486487f | 819 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 820 | struct expression *cond) |
5769d3cd | 821 | { |
17c84cca AA |
822 | unsigned ix; |
823 | s390_watch_area *area; | |
373c3dad AA |
824 | struct s390_debug_reg_state *state |
825 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
e1457d83 | 826 | |
17c84cca | 827 | for (ix = 0; |
373c3dad | 828 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca | 829 | ix++) |
5769d3cd | 830 | { |
17c84cca AA |
831 | if (area->lo_addr == addr && area->hi_addr == addr + len - 1) |
832 | { | |
373c3dad | 833 | VEC_unordered_remove (s390_watch_area, state->watch_areas, ix); |
17c84cca AA |
834 | return s390_refresh_per_info (); |
835 | } | |
5769d3cd | 836 | } |
e1457d83 | 837 | |
17c84cca AA |
838 | fprintf_unfiltered (gdb_stderr, |
839 | "Attempt to remove nonexistent watchpoint.\n"); | |
840 | return -1; | |
5769d3cd AC |
841 | } |
842 | ||
8193adea AA |
843 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
844 | ||
fd7979d1 | 845 | static int |
5461485a | 846 | s390_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 847 | enum bptype type, int cnt, int othertype) |
fd7979d1 | 848 | { |
8193adea AA |
849 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
850 | return 1; | |
851 | return 0; | |
852 | } | |
853 | ||
854 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
855 | ||
856 | static int | |
857 | s390_insert_hw_breakpoint (struct target_ops *self, | |
858 | struct gdbarch *gdbarch, | |
859 | struct bp_target_info *bp_tgt) | |
860 | { | |
861 | s390_watch_area area; | |
862 | struct s390_debug_reg_state *state; | |
863 | ||
864 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
865 | area.hi_addr = area.lo_addr; | |
866 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
867 | VEC_safe_push (s390_watch_area, state->break_areas, &area); | |
868 | ||
869 | return s390_refresh_per_info (); | |
870 | } | |
871 | ||
872 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
873 | ||
874 | static int | |
875 | s390_remove_hw_breakpoint (struct target_ops *self, | |
876 | struct gdbarch *gdbarch, | |
877 | struct bp_target_info *bp_tgt) | |
878 | { | |
879 | unsigned ix; | |
880 | struct watch_area *area; | |
881 | struct s390_debug_reg_state *state; | |
882 | ||
883 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
884 | for (ix = 0; | |
885 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
886 | ix++) | |
887 | { | |
888 | if (area->lo_addr == bp_tgt->placed_address) | |
889 | { | |
890 | VEC_unordered_remove (s390_watch_area, state->break_areas, ix); | |
891 | return s390_refresh_per_info (); | |
892 | } | |
893 | } | |
894 | ||
895 | fprintf_unfiltered (gdb_stderr, | |
896 | "Attempt to remove nonexistent breakpoint.\n"); | |
897 | return -1; | |
fd7979d1 | 898 | } |
e1457d83 | 899 | |
fd7979d1 | 900 | static int |
31568a15 TT |
901 | s390_region_ok_for_hw_watchpoint (struct target_ops *self, |
902 | CORE_ADDR addr, int cnt) | |
5769d3cd | 903 | { |
fd7979d1 | 904 | return 1; |
5769d3cd AC |
905 | } |
906 | ||
7803799a UW |
907 | static int |
908 | s390_target_wordsize (void) | |
909 | { | |
910 | int wordsize = 4; | |
911 | ||
912 | /* Check for 64-bit inferior process. This is the case when the host is | |
913 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
914 | #ifdef __s390x__ | |
915 | long pswm; | |
916 | ||
917 | errno = 0; | |
918 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
919 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
920 | wordsize = 8; | |
921 | #endif | |
922 | ||
923 | return wordsize; | |
924 | } | |
925 | ||
926 | static int | |
927 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
928 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
929 | { | |
930 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 931 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
932 | gdb_byte *ptr = *readptr; |
933 | ||
934 | if (endptr == ptr) | |
935 | return 0; | |
936 | ||
937 | if (endptr - ptr < sizeof_auxv_field * 2) | |
938 | return -1; | |
939 | ||
940 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
941 | ptr += sizeof_auxv_field; | |
942 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
943 | ptr += sizeof_auxv_field; | |
944 | ||
945 | *readptr = ptr; | |
946 | return 1; | |
947 | } | |
948 | ||
7803799a UW |
949 | static const struct target_desc * |
950 | s390_read_description (struct target_ops *ops) | |
951 | { | |
c642a434 UW |
952 | int tid = s390_inferior_tid (); |
953 | ||
954 | have_regset_last_break | |
955 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
956 | have_regset_system_call | |
957 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
958 | ||
7803799a UW |
959 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
960 | z/Architecture mode. If the target is running in 64-bit addressing | |
961 | mode, report s390x architecture. If the target is running in 31-bit | |
962 | addressing mode, but the kernel supports using 64-bit registers in | |
963 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
964 | #ifdef __s390x__ |
965 | { | |
966 | CORE_ADDR hwcap = 0; | |
967 | ||
968 | target_auxv_search (¤t_target, AT_HWCAP, &hwcap); | |
969 | have_regset_tdb = (hwcap & HWCAP_S390_TE) | |
970 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
971 | ||
972 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
973 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
974 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
975 | ||
976 | if (s390_target_wordsize () == 8) | |
977 | return (have_regset_vxrs ? | |
978 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
979 | tdesc_s390x_vx_linux64) : | |
980 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
981 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
982 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
983 | tdesc_s390x_linux64); | |
984 | ||
985 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
986 | return (have_regset_vxrs ? | |
987 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
988 | tdesc_s390_vx_linux64) : | |
989 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
990 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
991 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
992 | tdesc_s390_linux64); | |
993 | } | |
7803799a UW |
994 | #endif |
995 | ||
996 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
997 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
998 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
999 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
1000 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1001 | tdesc_s390_linux32); | |
7803799a | 1002 | } |
fd7979d1 | 1003 | |
10d6c8cd DJ |
1004 | void _initialize_s390_nat (void); |
1005 | ||
1006 | void | |
1007 | _initialize_s390_nat (void) | |
1008 | { | |
1009 | struct target_ops *t; | |
1010 | ||
1011 | /* Fill in the generic GNU/Linux methods. */ | |
1012 | t = linux_target (); | |
1013 | ||
1014 | /* Add our register access methods. */ | |
1015 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
1016 | t->to_store_registers = s390_linux_store_inferior_registers; | |
1017 | ||
fd7979d1 UW |
1018 | /* Add our watchpoint methods. */ |
1019 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
8193adea AA |
1020 | t->to_insert_hw_breakpoint = s390_insert_hw_breakpoint; |
1021 | t->to_remove_hw_breakpoint = s390_remove_hw_breakpoint; | |
2a3cdf79 | 1022 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
1023 | t->to_have_continuable_watchpoint = 1; |
1024 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
1025 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
1026 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
1027 | ||
7803799a UW |
1028 | /* Detect target architecture. */ |
1029 | t->to_read_description = s390_read_description; | |
1030 | t->to_auxv_parse = s390_auxv_parse; | |
1031 | ||
10d6c8cd | 1032 | /* Register the target. */ |
f973ed9c | 1033 | linux_nat_add_target (t); |
18396193 AA |
1034 | linux_nat_set_new_thread (t, s390_new_thread); |
1035 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); | |
373c3dad AA |
1036 | linux_nat_set_forget_process (t, s390_forget_process); |
1037 | linux_nat_set_new_fork (t, s390_linux_new_fork); | |
169fe0df AA |
1038 | |
1039 | /* A maintenance command to enable showing the PER state. */ | |
1040 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1041 | &show_debug_regs, _("\ | |
1042 | Set whether to show the PER (debug) hardware state."), _("\ | |
1043 | Show whether to show the PER (debug) hardware state."), _("\ | |
1044 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1045 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1046 | and when the inferior triggers a breakpoint or watchpoint."), | |
1047 | NULL, | |
1048 | NULL, | |
1049 | &maintenance_set_cmdlist, | |
1050 | &maintenance_show_cmdlist); | |
10d6c8cd | 1051 | } |