Commit | Line | Data |
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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
32d0add0 | 2 | Copyright (C) 2001-2015 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" |
d0f54f9d | 30 | |
0e5fae36 | 31 | #include "s390-linux-tdep.h" |
c642a434 | 32 | #include "elf/common.h" |
d0f54f9d | 33 | |
5769d3cd AC |
34 | #include <asm/ptrace.h> |
35 | #include <sys/ptrace.h> | |
2d0c7962 | 36 | #include <asm/types.h> |
5769d3cd | 37 | #include <sys/procfs.h> |
5769d3cd | 38 | #include <sys/ucontext.h> |
7803799a UW |
39 | #include <elf.h> |
40 | ||
c642a434 UW |
41 | #ifndef PTRACE_GETREGSET |
42 | #define PTRACE_GETREGSET 0x4204 | |
43 | #endif | |
44 | ||
45 | #ifndef PTRACE_SETREGSET | |
46 | #define PTRACE_SETREGSET 0x4205 | |
47 | #endif | |
48 | ||
18396193 AA |
49 | /* Per-thread arch-specific data. */ |
50 | ||
51 | struct arch_lwp_info | |
52 | { | |
53 | /* Non-zero if the thread's PER info must be re-written. */ | |
54 | int per_info_changed; | |
55 | }; | |
56 | ||
c642a434 UW |
57 | static int have_regset_last_break = 0; |
58 | static int have_regset_system_call = 0; | |
4ac33720 | 59 | static int have_regset_tdb = 0; |
550bdf96 | 60 | static int have_regset_vxrs = 0; |
5769d3cd | 61 | |
99b7da5d AA |
62 | /* Register map for 32-bit executables running under a 64-bit |
63 | kernel. */ | |
d0f54f9d JB |
64 | |
65 | #ifdef __s390x__ | |
99b7da5d AA |
66 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
67 | { | |
68 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
69 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
70 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
71 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
72 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
73 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
74 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
75 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
76 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
77 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
78 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
79 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
80 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
81 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
82 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
83 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
84 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
85 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
86 | { 16, S390_A0_REGNUM, 4 }, | |
87 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
88 | { 0 } | |
89 | }; | |
90 | ||
91 | static const struct regset s390_64_gregset = | |
92 | { | |
93 | s390_64_regmap_gregset, | |
94 | regcache_supply_regset, | |
95 | regcache_collect_regset | |
96 | }; | |
97 | ||
98 | #define S390_PSWM_OFFSET 0 | |
99 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 100 | #endif |
d0f54f9d | 101 | |
2ccd1468 UW |
102 | /* Fill GDB's register array with the general-purpose register values |
103 | in *REGP. | |
104 | ||
105 | When debugging a 32-bit executable running under a 64-bit kernel, | |
106 | we have to fix up the 64-bit registers we get from the kernel to | |
107 | make them look like 32-bit registers. */ | |
d6db1fab | 108 | |
2ccd1468 UW |
109 | void |
110 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
111 | { | |
9cbd5950 | 112 | #ifdef __s390x__ |
d6db1fab | 113 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
2ccd1468 | 114 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
115 | { |
116 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 117 | ULONGEST pswm, pswa; |
2ccd1468 | 118 | gdb_byte buf[4]; |
d6db1fab | 119 | |
99b7da5d AA |
120 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
121 | regp, sizeof (gregset_t)); | |
122 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
123 | + S390_PSWM_OFFSET, 8, byte_order); | |
124 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
125 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
126 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
127 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
128 | store_unsigned_integer (buf, 4, byte_order, | |
129 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
130 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
131 | return; | |
d6db1fab UW |
132 | } |
133 | #endif | |
134 | ||
99b7da5d AA |
135 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
136 | sizeof (gregset_t)); | |
d6db1fab UW |
137 | } |
138 | ||
2ccd1468 UW |
139 | /* Fill register REGNO (if it is a general-purpose register) in |
140 | *REGP with the value in GDB's register array. If REGNO is -1, | |
141 | do this for all registers. */ | |
d6db1fab | 142 | |
2ccd1468 UW |
143 | void |
144 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
145 | { | |
d6db1fab UW |
146 | #ifdef __s390x__ |
147 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2ccd1468 | 148 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 149 | { |
99b7da5d AA |
150 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
151 | regp, sizeof (gregset_t)); | |
d6db1fab | 152 | |
2ccd1468 UW |
153 | if (regno == -1 |
154 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 155 | { |
2ccd1468 UW |
156 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
157 | ULONGEST pswa, pswm; | |
d6db1fab UW |
158 | gdb_byte buf[4]; |
159 | ||
2ccd1468 UW |
160 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); |
161 | pswm = extract_unsigned_integer (buf, 4, byte_order); | |
162 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
d6db1fab UW |
163 | pswa = extract_unsigned_integer (buf, 4, byte_order); |
164 | ||
2ccd1468 | 165 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
99b7da5d AA |
166 | store_unsigned_integer ((gdb_byte *) regp + S390_PSWM_OFFSET, 8, |
167 | byte_order, ((pswm & 0xfff7ffff) << 32) | | |
2ccd1468 UW |
168 | (pswa & 0x80000000)); |
169 | if (regno == -1 || regno == S390_PSWA_REGNUM) | |
99b7da5d AA |
170 | store_unsigned_integer ((gdb_byte *) regp + S390_PSWA_OFFSET, 8, |
171 | byte_order, pswa & 0x7fffffff); | |
d6db1fab | 172 | } |
2ccd1468 | 173 | return; |
d6db1fab | 174 | } |
9cbd5950 JB |
175 | #endif |
176 | ||
99b7da5d AA |
177 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
178 | sizeof (gregset_t)); | |
d0f54f9d JB |
179 | } |
180 | ||
181 | /* Fill GDB's register array with the floating-point register values | |
182 | in *REGP. */ | |
183 | void | |
7f7fe91e | 184 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 185 | { |
99b7da5d AA |
186 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
187 | sizeof (fpregset_t)); | |
d0f54f9d JB |
188 | } |
189 | ||
190 | /* Fill register REGNO (if it is a general-purpose register) in | |
191 | *REGP with the value in GDB's register array. If REGNO is -1, | |
192 | do this for all registers. */ | |
193 | void | |
7f7fe91e | 194 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 195 | { |
99b7da5d AA |
196 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
197 | sizeof (fpregset_t)); | |
d0f54f9d JB |
198 | } |
199 | ||
200 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
201 | static int | |
202 | s390_inferior_tid (void) | |
203 | { | |
204 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 205 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 206 | if (tid == 0) |
dfd4cc63 | 207 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
208 | |
209 | return tid; | |
210 | } | |
211 | ||
212 | /* Fetch all general-purpose registers from process/thread TID and | |
213 | store their values in GDB's register cache. */ | |
214 | static void | |
56be3814 | 215 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
216 | { |
217 | gregset_t regs; | |
218 | ptrace_area parea; | |
219 | ||
220 | parea.len = sizeof (regs); | |
221 | parea.process_addr = (addr_t) ®s; | |
222 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
223 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 224 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 225 | |
56be3814 | 226 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
227 | } |
228 | ||
229 | /* Store all valid general-purpose registers in GDB's register cache | |
230 | into the process/thread specified by TID. */ | |
231 | static void | |
56be3814 | 232 | store_regs (const struct regcache *regcache, int tid, int regnum) |
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); | |
240 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 241 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 242 | |
56be3814 | 243 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d JB |
244 | |
245 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 246 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
247 | } |
248 | ||
249 | /* Fetch all floating-point registers from process/thread TID and store | |
250 | their values in GDB's register cache. */ | |
251 | static void | |
56be3814 | 252 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
253 | { |
254 | fpregset_t fpregs; | |
255 | ptrace_area parea; | |
256 | ||
257 | parea.len = sizeof (fpregs); | |
258 | parea.process_addr = (addr_t) &fpregs; | |
259 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
260 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 261 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 262 | |
56be3814 | 263 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
264 | } |
265 | ||
266 | /* Store all valid floating-point registers in GDB's register cache | |
267 | into the process/thread specified by TID. */ | |
268 | static void | |
56be3814 | 269 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
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); | |
277 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 278 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 279 | |
56be3814 | 280 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d JB |
281 | |
282 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 283 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
284 | } |
285 | ||
99b7da5d AA |
286 | /* Fetch all registers in the kernel's register set whose number is |
287 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
288 | REGSET, from process/thread TID and store their values in GDB's | |
289 | register cache. */ | |
c642a434 UW |
290 | static void |
291 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 292 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 293 | { |
c642a434 UW |
294 | gdb_byte *buf = alloca (regsize); |
295 | struct iovec iov; | |
c642a434 UW |
296 | |
297 | iov.iov_base = buf; | |
298 | iov.iov_len = regsize; | |
299 | ||
99b7da5d | 300 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
301 | { |
302 | if (errno == ENODATA) | |
99b7da5d | 303 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
304 | else |
305 | perror_with_name (_("Couldn't get register set")); | |
306 | } | |
307 | else | |
99b7da5d | 308 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
309 | } |
310 | ||
99b7da5d AA |
311 | /* Store all registers in the kernel's register set whose number is |
312 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
313 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
314 | static void |
315 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 316 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 317 | { |
c642a434 UW |
318 | gdb_byte *buf = alloca (regsize); |
319 | struct iovec iov; | |
c642a434 UW |
320 | |
321 | iov.iov_base = buf; | |
322 | iov.iov_len = regsize; | |
323 | ||
99b7da5d | 324 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
325 | perror_with_name (_("Couldn't get register set")); |
326 | ||
99b7da5d | 327 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 328 | |
99b7da5d | 329 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
330 | perror_with_name (_("Couldn't set register set")); |
331 | } | |
332 | ||
333 | /* Check whether the kernel provides a register set with number REGSET | |
334 | of size REGSIZE for process/thread TID. */ | |
335 | static int | |
336 | check_regset (int tid, int regset, int regsize) | |
337 | { | |
338 | gdb_byte *buf = alloca (regsize); | |
339 | struct iovec iov; | |
340 | ||
341 | iov.iov_base = buf; | |
342 | iov.iov_len = regsize; | |
343 | ||
4ac33720 UW |
344 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
345 | || errno == ENODATA) | |
c642a434 | 346 | return 1; |
4ac33720 | 347 | return 0; |
c642a434 UW |
348 | } |
349 | ||
d0f54f9d JB |
350 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
351 | this for all registers. */ | |
10d6c8cd | 352 | static void |
28439f5e PA |
353 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
354 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
355 | { |
356 | int tid = s390_inferior_tid (); | |
357 | ||
2ccd1468 | 358 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 359 | fetch_regs (regcache, tid); |
d0f54f9d | 360 | |
2ccd1468 | 361 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 362 | fetch_fpregs (regcache, tid); |
c642a434 UW |
363 | |
364 | if (have_regset_last_break) | |
365 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
366 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
367 | (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32 | |
99b7da5d | 368 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
369 | |
370 | if (have_regset_system_call) | |
371 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
372 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 373 | &s390_system_call_regset); |
4ac33720 UW |
374 | |
375 | if (have_regset_tdb) | |
376 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
377 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 378 | &s390_tdb_regset); |
550bdf96 AA |
379 | |
380 | if (have_regset_vxrs) | |
381 | { | |
382 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
383 | && regnum <= S390_V15_LOWER_REGNUM)) | |
384 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
385 | &s390_vxrs_low_regset); | |
386 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
387 | && regnum <= S390_V31_REGNUM)) | |
388 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
389 | &s390_vxrs_high_regset); | |
390 | } | |
d0f54f9d JB |
391 | } |
392 | ||
393 | /* Store register REGNUM back into the child process. If REGNUM is | |
394 | -1, do this for all registers. */ | |
10d6c8cd | 395 | static void |
28439f5e PA |
396 | s390_linux_store_inferior_registers (struct target_ops *ops, |
397 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
398 | { |
399 | int tid = s390_inferior_tid (); | |
400 | ||
2ccd1468 | 401 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 402 | store_regs (regcache, tid, regnum); |
d0f54f9d | 403 | |
2ccd1468 | 404 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 405 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
406 | |
407 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
408 | ||
409 | if (have_regset_system_call) | |
410 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
411 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 412 | &s390_system_call_regset); |
550bdf96 AA |
413 | |
414 | if (have_regset_vxrs) | |
415 | { | |
416 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
417 | && regnum <= S390_V15_LOWER_REGNUM)) | |
418 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
419 | &s390_vxrs_low_regset); | |
420 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
421 | && regnum <= S390_V31_REGNUM)) | |
422 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
423 | &s390_vxrs_high_regset); | |
424 | } | |
5769d3cd AC |
425 | } |
426 | ||
d0f54f9d | 427 | |
e1457d83 JB |
428 | /* Hardware-assisted watchpoint handling. */ |
429 | ||
430 | /* We maintain a list of all currently active watchpoints in order | |
431 | to properly handle watchpoint removal. | |
432 | ||
433 | The only thing we actually need is the total address space area | |
434 | spanned by the watchpoints. */ | |
435 | ||
5769d3cd AC |
436 | struct watch_area |
437 | { | |
e1457d83 | 438 | struct watch_area *next; |
5769d3cd AC |
439 | CORE_ADDR lo_addr; |
440 | CORE_ADDR hi_addr; | |
441 | }; | |
442 | ||
e1457d83 | 443 | static struct watch_area *watch_base = NULL; |
5769d3cd | 444 | |
fd7979d1 | 445 | static int |
6a109b6b | 446 | s390_stopped_by_watchpoint (struct target_ops *ops) |
5769d3cd AC |
447 | { |
448 | per_lowcore_bits per_lowcore; | |
449 | ptrace_area parea; | |
9f0bdab8 | 450 | int result; |
5769d3cd | 451 | |
e1457d83 JB |
452 | /* Speed up common case. */ |
453 | if (!watch_base) | |
454 | return 0; | |
455 | ||
5769d3cd AC |
456 | parea.len = sizeof (per_lowcore); |
457 | parea.process_addr = (addr_t) & per_lowcore; | |
458 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
e1457d83 | 459 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea) < 0) |
e2e0b3e5 | 460 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 461 | |
9f0bdab8 DJ |
462 | result = (per_lowcore.perc_storage_alteration == 1 |
463 | && per_lowcore.perc_store_real_address == 0); | |
464 | ||
465 | if (result) | |
466 | { | |
467 | /* Do not report this watchpoint again. */ | |
468 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
469 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea) < 0) | |
470 | perror_with_name (_("Couldn't clear watchpoint status")); | |
471 | } | |
472 | ||
473 | return result; | |
e1457d83 | 474 | } |
5769d3cd | 475 | |
18396193 AA |
476 | /* Each time before resuming a thread, update its PER info. */ |
477 | ||
e1457d83 | 478 | static void |
18396193 | 479 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 480 | { |
9f0bdab8 | 481 | int tid; |
e1457d83 | 482 | |
5769d3cd AC |
483 | per_struct per_info; |
484 | ptrace_area parea; | |
485 | ||
e1457d83 JB |
486 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
487 | struct watch_area *area; | |
488 | ||
18396193 AA |
489 | if (lp->arch_private == NULL |
490 | || !lp->arch_private->per_info_changed) | |
491 | return; | |
492 | ||
493 | lp->arch_private->per_info_changed = 0; | |
494 | ||
dfd4cc63 | 495 | tid = ptid_get_lwp (lp->ptid); |
9f0bdab8 | 496 | if (tid == 0) |
dfd4cc63 | 497 | tid = ptid_get_pid (lp->ptid); |
9f0bdab8 | 498 | |
e1457d83 JB |
499 | for (area = watch_base; area; area = area->next) |
500 | { | |
501 | watch_lo_addr = min (watch_lo_addr, area->lo_addr); | |
502 | watch_hi_addr = max (watch_hi_addr, area->hi_addr); | |
503 | } | |
504 | ||
5769d3cd AC |
505 | parea.len = sizeof (per_info); |
506 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 JB |
507 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
508 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea) < 0) | |
e2e0b3e5 | 509 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
e1457d83 JB |
510 | |
511 | if (watch_base) | |
5769d3cd AC |
512 | { |
513 | per_info.control_regs.bits.em_storage_alteration = 1; | |
514 | per_info.control_regs.bits.storage_alt_space_ctl = 1; | |
515 | } | |
516 | else | |
517 | { | |
518 | per_info.control_regs.bits.em_storage_alteration = 0; | |
519 | per_info.control_regs.bits.storage_alt_space_ctl = 0; | |
520 | } | |
521 | per_info.starting_addr = watch_lo_addr; | |
522 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 JB |
523 | |
524 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea) < 0) | |
e2e0b3e5 | 525 | perror_with_name (_("Couldn't modify watchpoint status")); |
5769d3cd AC |
526 | } |
527 | ||
18396193 AA |
528 | /* Make sure that LP is stopped and mark its PER info as changed, so |
529 | the next resume will update it. */ | |
530 | ||
531 | static void | |
532 | s390_refresh_per_info (struct lwp_info *lp) | |
533 | { | |
534 | if (lp->arch_private == NULL) | |
535 | lp->arch_private = XCNEW (struct arch_lwp_info); | |
536 | ||
537 | lp->arch_private->per_info_changed = 1; | |
538 | ||
539 | if (!lp->stopped) | |
540 | linux_stop_lwp (lp); | |
541 | } | |
542 | ||
543 | /* When attaching to a new thread, mark its PER info as changed. */ | |
544 | ||
545 | static void | |
546 | s390_new_thread (struct lwp_info *lp) | |
547 | { | |
548 | lp->arch_private = XCNEW (struct arch_lwp_info); | |
549 | lp->arch_private->per_info_changed = 1; | |
550 | } | |
551 | ||
fd7979d1 | 552 | static int |
7bb99c53 TT |
553 | s390_insert_watchpoint (struct target_ops *self, |
554 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 555 | struct expression *cond) |
5769d3cd | 556 | { |
9f0bdab8 | 557 | struct lwp_info *lp; |
e1457d83 | 558 | struct watch_area *area = xmalloc (sizeof (struct watch_area)); |
9f0bdab8 | 559 | |
e1457d83 | 560 | if (!area) |
34201ae3 | 561 | return -1; |
e1457d83 JB |
562 | |
563 | area->lo_addr = addr; | |
564 | area->hi_addr = addr + len - 1; | |
34201ae3 | 565 | |
e1457d83 JB |
566 | area->next = watch_base; |
567 | watch_base = area; | |
568 | ||
4c38200f | 569 | ALL_LWPS (lp) |
18396193 | 570 | s390_refresh_per_info (lp); |
e1457d83 | 571 | return 0; |
5769d3cd AC |
572 | } |
573 | ||
fd7979d1 | 574 | static int |
11b5219a TT |
575 | s390_remove_watchpoint (struct target_ops *self, |
576 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 577 | struct expression *cond) |
5769d3cd | 578 | { |
9f0bdab8 | 579 | struct lwp_info *lp; |
e1457d83 JB |
580 | struct watch_area *area, **parea; |
581 | ||
582 | for (parea = &watch_base; *parea; parea = &(*parea)->next) | |
583 | if ((*parea)->lo_addr == addr | |
584 | && (*parea)->hi_addr == addr + len - 1) | |
585 | break; | |
586 | ||
587 | if (!*parea) | |
5769d3cd AC |
588 | { |
589 | fprintf_unfiltered (gdb_stderr, | |
e1457d83 | 590 | "Attempt to remove nonexistent watchpoint.\n"); |
5769d3cd AC |
591 | return -1; |
592 | } | |
e1457d83 JB |
593 | |
594 | area = *parea; | |
595 | *parea = area->next; | |
596 | xfree (area); | |
597 | ||
4c38200f | 598 | ALL_LWPS (lp) |
18396193 | 599 | s390_refresh_per_info (lp); |
e1457d83 | 600 | return 0; |
5769d3cd AC |
601 | } |
602 | ||
fd7979d1 | 603 | static int |
5461485a TT |
604 | s390_can_use_hw_breakpoint (struct target_ops *self, |
605 | int type, int cnt, int othertype) | |
fd7979d1 | 606 | { |
b1798462 | 607 | return type == bp_hardware_watchpoint; |
fd7979d1 | 608 | } |
e1457d83 | 609 | |
fd7979d1 | 610 | static int |
31568a15 TT |
611 | s390_region_ok_for_hw_watchpoint (struct target_ops *self, |
612 | CORE_ADDR addr, int cnt) | |
5769d3cd | 613 | { |
fd7979d1 | 614 | return 1; |
5769d3cd AC |
615 | } |
616 | ||
7803799a UW |
617 | static int |
618 | s390_target_wordsize (void) | |
619 | { | |
620 | int wordsize = 4; | |
621 | ||
622 | /* Check for 64-bit inferior process. This is the case when the host is | |
623 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
624 | #ifdef __s390x__ | |
625 | long pswm; | |
626 | ||
627 | errno = 0; | |
628 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
629 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
630 | wordsize = 8; | |
631 | #endif | |
632 | ||
633 | return wordsize; | |
634 | } | |
635 | ||
636 | static int | |
637 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
638 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
639 | { | |
640 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 641 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
642 | gdb_byte *ptr = *readptr; |
643 | ||
644 | if (endptr == ptr) | |
645 | return 0; | |
646 | ||
647 | if (endptr - ptr < sizeof_auxv_field * 2) | |
648 | return -1; | |
649 | ||
650 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
651 | ptr += sizeof_auxv_field; | |
652 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
653 | ptr += sizeof_auxv_field; | |
654 | ||
655 | *readptr = ptr; | |
656 | return 1; | |
657 | } | |
658 | ||
7803799a UW |
659 | static const struct target_desc * |
660 | s390_read_description (struct target_ops *ops) | |
661 | { | |
c642a434 UW |
662 | int tid = s390_inferior_tid (); |
663 | ||
664 | have_regset_last_break | |
665 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
666 | have_regset_system_call | |
667 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
668 | ||
7803799a UW |
669 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
670 | z/Architecture mode. If the target is running in 64-bit addressing | |
671 | mode, report s390x architecture. If the target is running in 31-bit | |
672 | addressing mode, but the kernel supports using 64-bit registers in | |
673 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
674 | #ifdef __s390x__ |
675 | { | |
676 | CORE_ADDR hwcap = 0; | |
677 | ||
678 | target_auxv_search (¤t_target, AT_HWCAP, &hwcap); | |
679 | have_regset_tdb = (hwcap & HWCAP_S390_TE) | |
680 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
681 | ||
682 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
683 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
684 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
685 | ||
686 | if (s390_target_wordsize () == 8) | |
687 | return (have_regset_vxrs ? | |
688 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
689 | tdesc_s390x_vx_linux64) : | |
690 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
691 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
692 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
693 | tdesc_s390x_linux64); | |
694 | ||
695 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
696 | return (have_regset_vxrs ? | |
697 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
698 | tdesc_s390_vx_linux64) : | |
699 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
700 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
701 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
702 | tdesc_s390_linux64); | |
703 | } | |
7803799a UW |
704 | #endif |
705 | ||
706 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
707 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
708 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
709 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
710 | have_regset_last_break? tdesc_s390_linux32v1 : | |
711 | tdesc_s390_linux32); | |
7803799a | 712 | } |
fd7979d1 | 713 | |
10d6c8cd DJ |
714 | void _initialize_s390_nat (void); |
715 | ||
716 | void | |
717 | _initialize_s390_nat (void) | |
718 | { | |
719 | struct target_ops *t; | |
720 | ||
721 | /* Fill in the generic GNU/Linux methods. */ | |
722 | t = linux_target (); | |
723 | ||
724 | /* Add our register access methods. */ | |
725 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
726 | t->to_store_registers = s390_linux_store_inferior_registers; | |
727 | ||
fd7979d1 UW |
728 | /* Add our watchpoint methods. */ |
729 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
2a3cdf79 | 730 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
731 | t->to_have_continuable_watchpoint = 1; |
732 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
733 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
734 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
735 | ||
7803799a UW |
736 | /* Detect target architecture. */ |
737 | t->to_read_description = s390_read_description; | |
738 | t->to_auxv_parse = s390_auxv_parse; | |
739 | ||
10d6c8cd | 740 | /* Register the target. */ |
f973ed9c | 741 | linux_nat_add_target (t); |
18396193 AA |
742 | linux_nat_set_new_thread (t, s390_new_thread); |
743 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); | |
10d6c8cd | 744 | } |