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