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