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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
e2882c85 | 2 | Copyright (C) 2001-2018 Free Software Foundation, Inc. |
d0f54f9d | 3 | |
5769d3cd AC |
4 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
5 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. | |
d0f54f9d | 6 | |
5769d3cd AC |
7 | This file is part of GDB. |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
5769d3cd AC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
5769d3cd AC |
21 | |
22 | #include "defs.h" | |
3ecc0ae2 | 23 | #include "regcache.h" |
d0f54f9d | 24 | #include "inferior.h" |
10d6c8cd DJ |
25 | #include "target.h" |
26 | #include "linux-nat.h" | |
7803799a | 27 | #include "auxv.h" |
5538f557 | 28 | #include "gregset.h" |
99b7da5d | 29 | #include "regset.h" |
ca9b78ce | 30 | #include "nat/linux-ptrace.h" |
169fe0df | 31 | #include "gdbcmd.h" |
d0f54f9d | 32 | |
d6e58945 | 33 | #include "s390-tdep.h" |
0e5fae36 | 34 | #include "s390-linux-tdep.h" |
c642a434 | 35 | #include "elf/common.h" |
d0f54f9d | 36 | |
5769d3cd | 37 | #include <asm/ptrace.h> |
5826e159 | 38 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 39 | #include <asm/types.h> |
5769d3cd | 40 | #include <sys/procfs.h> |
5769d3cd | 41 | #include <sys/ucontext.h> |
7803799a | 42 | #include <elf.h> |
93689493 | 43 | #include <algorithm> |
bcc0c096 | 44 | #include "inf-ptrace.h" |
7803799a | 45 | |
18396193 AA |
46 | /* Per-thread arch-specific data. */ |
47 | ||
48 | struct arch_lwp_info | |
49 | { | |
50 | /* Non-zero if the thread's PER info must be re-written. */ | |
51 | int per_info_changed; | |
52 | }; | |
53 | ||
c642a434 UW |
54 | static int have_regset_last_break = 0; |
55 | static int have_regset_system_call = 0; | |
4ac33720 | 56 | static int have_regset_tdb = 0; |
550bdf96 | 57 | static int have_regset_vxrs = 0; |
1b63490c | 58 | static int have_regset_gs = 0; |
5769d3cd | 59 | |
99b7da5d AA |
60 | /* Register map for 32-bit executables running under a 64-bit |
61 | kernel. */ | |
d0f54f9d JB |
62 | |
63 | #ifdef __s390x__ | |
99b7da5d AA |
64 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
65 | { | |
66 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
67 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
68 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
69 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
70 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
71 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
72 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
73 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
74 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
75 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
76 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
77 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
78 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
79 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
80 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
81 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
82 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
83 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
84 | { 16, S390_A0_REGNUM, 4 }, | |
85 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
86 | { 0 } | |
87 | }; | |
88 | ||
89 | static const struct regset s390_64_gregset = | |
90 | { | |
91 | s390_64_regmap_gregset, | |
92 | regcache_supply_regset, | |
93 | regcache_collect_regset | |
94 | }; | |
95 | ||
96 | #define S390_PSWM_OFFSET 0 | |
97 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 98 | #endif |
d0f54f9d | 99 | |
8193adea AA |
100 | /* PER-event mask bits and PER control bits (CR9). */ |
101 | ||
102 | #define PER_BIT(n) (1UL << (63 - (n))) | |
103 | #define PER_EVENT_BRANCH PER_BIT (32) | |
104 | #define PER_EVENT_IFETCH PER_BIT (33) | |
105 | #define PER_EVENT_STORE PER_BIT (34) | |
106 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
107 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
108 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
109 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
110 | ||
f6ac5f3d PA |
111 | class s390_linux_nat_target final : public linux_nat_target |
112 | { | |
113 | public: | |
114 | /* Add our register access methods. */ | |
115 | void fetch_registers (struct regcache *, int) override; | |
116 | void store_registers (struct regcache *, int) override; | |
117 | ||
118 | /* Add our watchpoint methods. */ | |
119 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
120 | int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
121 | override; | |
122 | int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
123 | override; | |
124 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
125 | int have_continuable_watchpoint () { return 1; } | |
126 | int stopped_by_watchpoint () override; | |
127 | int watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override; | |
128 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
129 | struct expression *) override; | |
130 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
131 | struct expression *) override; | |
132 | ||
133 | /* Detect target architecture. */ | |
134 | const struct target_desc *read_description () override; | |
135 | int auxv_parse (gdb_byte **readptr, | |
136 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
137 | override; | |
138 | }; | |
139 | ||
140 | static s390_linux_nat_target the_s390_linux_nat_target; | |
8193adea | 141 | |
2ccd1468 UW |
142 | /* Fill GDB's register array with the general-purpose register values |
143 | in *REGP. | |
144 | ||
145 | When debugging a 32-bit executable running under a 64-bit kernel, | |
146 | we have to fix up the 64-bit registers we get from the kernel to | |
147 | make them look like 32-bit registers. */ | |
d6db1fab | 148 | |
2ccd1468 UW |
149 | void |
150 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
151 | { | |
9cbd5950 | 152 | #ifdef __s390x__ |
ac7936df | 153 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 154 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
155 | { |
156 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 157 | ULONGEST pswm, pswa; |
2ccd1468 | 158 | gdb_byte buf[4]; |
d6db1fab | 159 | |
99b7da5d AA |
160 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
161 | regp, sizeof (gregset_t)); | |
162 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
163 | + S390_PSWM_OFFSET, 8, byte_order); | |
164 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
165 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
166 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
167 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
168 | store_unsigned_integer (buf, 4, byte_order, | |
169 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
170 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
171 | return; | |
d6db1fab UW |
172 | } |
173 | #endif | |
174 | ||
99b7da5d AA |
175 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
176 | sizeof (gregset_t)); | |
d6db1fab UW |
177 | } |
178 | ||
2ccd1468 UW |
179 | /* Fill register REGNO (if it is a general-purpose register) in |
180 | *REGP with the value in GDB's register array. If REGNO is -1, | |
181 | do this for all registers. */ | |
d6db1fab | 182 | |
2ccd1468 UW |
183 | void |
184 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
185 | { | |
d6db1fab | 186 | #ifdef __s390x__ |
ac7936df | 187 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 188 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 189 | { |
99b7da5d AA |
190 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
191 | regp, sizeof (gregset_t)); | |
d6db1fab | 192 | |
2ccd1468 UW |
193 | if (regno == -1 |
194 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 195 | { |
2ccd1468 UW |
196 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
197 | ULONGEST pswa, pswm; | |
d6db1fab | 198 | gdb_byte buf[4]; |
2492f0d0 AA |
199 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
200 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 201 | |
2492f0d0 | 202 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 203 | |
2ccd1468 | 204 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
205 | { |
206 | pswm &= 0x80000000; | |
207 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); | |
208 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) | |
209 | & 0xfff7ffff) << 32; | |
210 | } | |
211 | ||
2ccd1468 | 212 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 AA |
213 | { |
214 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
215 | pswa = extract_unsigned_integer (buf, 4, byte_order); | |
216 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
217 | pswa &= 0x7fffffff; | |
218 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
219 | } | |
220 | ||
221 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 222 | } |
2ccd1468 | 223 | return; |
d6db1fab | 224 | } |
9cbd5950 JB |
225 | #endif |
226 | ||
99b7da5d AA |
227 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
228 | sizeof (gregset_t)); | |
d0f54f9d JB |
229 | } |
230 | ||
231 | /* Fill GDB's register array with the floating-point register values | |
232 | in *REGP. */ | |
233 | void | |
7f7fe91e | 234 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 235 | { |
99b7da5d AA |
236 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
237 | sizeof (fpregset_t)); | |
d0f54f9d JB |
238 | } |
239 | ||
240 | /* Fill register REGNO (if it is a general-purpose register) in | |
241 | *REGP with the value in GDB's register array. If REGNO is -1, | |
242 | do this for all registers. */ | |
243 | void | |
7f7fe91e | 244 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 245 | { |
99b7da5d AA |
246 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
247 | sizeof (fpregset_t)); | |
d0f54f9d JB |
248 | } |
249 | ||
250 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
251 | static int | |
252 | s390_inferior_tid (void) | |
253 | { | |
254 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 255 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 256 | if (tid == 0) |
dfd4cc63 | 257 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
258 | |
259 | return tid; | |
260 | } | |
261 | ||
262 | /* Fetch all general-purpose registers from process/thread TID and | |
263 | store their values in GDB's register cache. */ | |
264 | static void | |
56be3814 | 265 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
266 | { |
267 | gregset_t regs; | |
268 | ptrace_area parea; | |
269 | ||
270 | parea.len = sizeof (regs); | |
271 | parea.process_addr = (addr_t) ®s; | |
272 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 273 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 274 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 275 | |
56be3814 | 276 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
277 | } |
278 | ||
279 | /* Store all valid general-purpose registers in GDB's register cache | |
280 | into the process/thread specified by TID. */ | |
281 | static void | |
56be3814 | 282 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
283 | { |
284 | gregset_t regs; | |
285 | ptrace_area parea; | |
286 | ||
287 | parea.len = sizeof (regs); | |
288 | parea.process_addr = (addr_t) ®s; | |
289 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 290 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 291 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 292 | |
56be3814 | 293 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 294 | |
2b4cab86 | 295 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 296 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
297 | } |
298 | ||
299 | /* Fetch all floating-point registers from process/thread TID and store | |
300 | their values in GDB's register cache. */ | |
301 | static void | |
56be3814 | 302 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
303 | { |
304 | fpregset_t fpregs; | |
305 | ptrace_area parea; | |
306 | ||
307 | parea.len = sizeof (fpregs); | |
308 | parea.process_addr = (addr_t) &fpregs; | |
309 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 310 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 311 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 312 | |
56be3814 | 313 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
314 | } |
315 | ||
316 | /* Store all valid floating-point registers in GDB's register cache | |
317 | into the process/thread specified by TID. */ | |
318 | static void | |
56be3814 | 319 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
320 | { |
321 | fpregset_t fpregs; | |
322 | ptrace_area parea; | |
323 | ||
324 | parea.len = sizeof (fpregs); | |
325 | parea.process_addr = (addr_t) &fpregs; | |
326 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 327 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 328 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 329 | |
56be3814 | 330 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 331 | |
2b4cab86 | 332 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 333 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
334 | } |
335 | ||
99b7da5d AA |
336 | /* Fetch all registers in the kernel's register set whose number is |
337 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
338 | REGSET, from process/thread TID and store their values in GDB's | |
339 | register cache. */ | |
c642a434 UW |
340 | static void |
341 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 342 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 343 | { |
3451269c | 344 | void *buf = alloca (regsize); |
c642a434 | 345 | struct iovec iov; |
c642a434 UW |
346 | |
347 | iov.iov_base = buf; | |
348 | iov.iov_len = regsize; | |
349 | ||
99b7da5d | 350 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
351 | { |
352 | if (errno == ENODATA) | |
99b7da5d | 353 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
354 | else |
355 | perror_with_name (_("Couldn't get register set")); | |
356 | } | |
357 | else | |
99b7da5d | 358 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
359 | } |
360 | ||
99b7da5d AA |
361 | /* Store all registers in the kernel's register set whose number is |
362 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
363 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
364 | static void |
365 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 366 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 367 | { |
3451269c | 368 | void *buf = alloca (regsize); |
c642a434 | 369 | struct iovec iov; |
c642a434 UW |
370 | |
371 | iov.iov_base = buf; | |
372 | iov.iov_len = regsize; | |
373 | ||
99b7da5d | 374 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
375 | perror_with_name (_("Couldn't get register set")); |
376 | ||
99b7da5d | 377 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 378 | |
99b7da5d | 379 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
380 | perror_with_name (_("Couldn't set register set")); |
381 | } | |
382 | ||
383 | /* Check whether the kernel provides a register set with number REGSET | |
384 | of size REGSIZE for process/thread TID. */ | |
385 | static int | |
386 | check_regset (int tid, int regset, int regsize) | |
387 | { | |
3451269c | 388 | void *buf = alloca (regsize); |
c642a434 UW |
389 | struct iovec iov; |
390 | ||
391 | iov.iov_base = buf; | |
392 | iov.iov_len = regsize; | |
393 | ||
4ac33720 UW |
394 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
395 | || errno == ENODATA) | |
c642a434 | 396 | return 1; |
4ac33720 | 397 | return 0; |
c642a434 UW |
398 | } |
399 | ||
d0f54f9d JB |
400 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
401 | this for all registers. */ | |
f6ac5f3d PA |
402 | void |
403 | s390_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 404 | { |
bcc0c096 | 405 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
d0f54f9d | 406 | |
2ccd1468 | 407 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 408 | fetch_regs (regcache, tid); |
d0f54f9d | 409 | |
2ccd1468 | 410 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 411 | fetch_fpregs (regcache, tid); |
c642a434 UW |
412 | |
413 | if (have_regset_last_break) | |
414 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
415 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
ac7936df | 416 | (gdbarch_ptr_bit (regcache->arch ()) == 32 |
99b7da5d | 417 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
418 | |
419 | if (have_regset_system_call) | |
420 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
421 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 422 | &s390_system_call_regset); |
4ac33720 UW |
423 | |
424 | if (have_regset_tdb) | |
425 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
426 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 427 | &s390_tdb_regset); |
550bdf96 AA |
428 | |
429 | if (have_regset_vxrs) | |
430 | { | |
431 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
432 | && regnum <= S390_V15_LOWER_REGNUM)) | |
433 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
434 | &s390_vxrs_low_regset); | |
435 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
436 | && regnum <= S390_V31_REGNUM)) | |
437 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
438 | &s390_vxrs_high_regset); | |
439 | } | |
1b63490c AA |
440 | |
441 | if (have_regset_gs) | |
442 | { | |
443 | if (regnum == -1 || (regnum >= S390_GSD_REGNUM | |
444 | && regnum <= S390_GSEPLA_REGNUM)) | |
445 | fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8, | |
446 | &s390_gs_regset); | |
447 | if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM | |
448 | && regnum <= S390_BC_GSEPLA_REGNUM)) | |
449 | fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8, | |
450 | &s390_gsbc_regset); | |
451 | } | |
d0f54f9d JB |
452 | } |
453 | ||
454 | /* Store register REGNUM back into the child process. If REGNUM is | |
455 | -1, do this for all registers. */ | |
f6ac5f3d PA |
456 | void |
457 | s390_linux_nat_target::store_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 458 | { |
bcc0c096 | 459 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
d0f54f9d | 460 | |
2ccd1468 | 461 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 462 | store_regs (regcache, tid, regnum); |
d0f54f9d | 463 | |
2ccd1468 | 464 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 465 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
466 | |
467 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
468 | ||
469 | if (have_regset_system_call) | |
470 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
471 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 472 | &s390_system_call_regset); |
550bdf96 AA |
473 | |
474 | if (have_regset_vxrs) | |
475 | { | |
476 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
477 | && regnum <= S390_V15_LOWER_REGNUM)) | |
478 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
479 | &s390_vxrs_low_regset); | |
480 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
481 | && regnum <= S390_V31_REGNUM)) | |
482 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
483 | &s390_vxrs_high_regset); | |
484 | } | |
5769d3cd AC |
485 | } |
486 | ||
d0f54f9d | 487 | |
e1457d83 JB |
488 | /* Hardware-assisted watchpoint handling. */ |
489 | ||
373c3dad AA |
490 | /* For each process we maintain a list of all currently active |
491 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
492 | |
493 | The only thing we actually need is the total address space area | |
494 | spanned by the watchpoints. */ | |
495 | ||
17c84cca | 496 | typedef struct watch_area |
5769d3cd | 497 | { |
5769d3cd AC |
498 | CORE_ADDR lo_addr; |
499 | CORE_ADDR hi_addr; | |
17c84cca AA |
500 | } s390_watch_area; |
501 | ||
502 | DEF_VEC_O (s390_watch_area); | |
5769d3cd | 503 | |
373c3dad AA |
504 | /* Hardware debug state. */ |
505 | ||
506 | struct s390_debug_reg_state | |
507 | { | |
508 | VEC_s390_watch_area *watch_areas; | |
8193adea | 509 | VEC_s390_watch_area *break_areas; |
373c3dad AA |
510 | }; |
511 | ||
512 | /* Per-process data. */ | |
513 | ||
514 | struct s390_process_info | |
515 | { | |
516 | struct s390_process_info *next; | |
517 | pid_t pid; | |
518 | struct s390_debug_reg_state state; | |
519 | }; | |
520 | ||
521 | static struct s390_process_info *s390_process_list = NULL; | |
522 | ||
523 | /* Find process data for process PID. */ | |
524 | ||
525 | static struct s390_process_info * | |
526 | s390_find_process_pid (pid_t pid) | |
527 | { | |
528 | struct s390_process_info *proc; | |
529 | ||
530 | for (proc = s390_process_list; proc; proc = proc->next) | |
531 | if (proc->pid == pid) | |
532 | return proc; | |
533 | ||
534 | return NULL; | |
535 | } | |
536 | ||
537 | /* Add process data for process PID. Returns newly allocated info | |
538 | object. */ | |
539 | ||
540 | static struct s390_process_info * | |
541 | s390_add_process (pid_t pid) | |
542 | { | |
543 | struct s390_process_info *proc = XCNEW (struct s390_process_info); | |
544 | ||
545 | proc->pid = pid; | |
546 | proc->next = s390_process_list; | |
547 | s390_process_list = proc; | |
548 | ||
549 | return proc; | |
550 | } | |
551 | ||
552 | /* Get data specific info for process PID, creating it if necessary. | |
553 | Never returns NULL. */ | |
554 | ||
555 | static struct s390_process_info * | |
556 | s390_process_info_get (pid_t pid) | |
557 | { | |
558 | struct s390_process_info *proc; | |
559 | ||
560 | proc = s390_find_process_pid (pid); | |
561 | if (proc == NULL) | |
562 | proc = s390_add_process (pid); | |
563 | ||
564 | return proc; | |
565 | } | |
566 | ||
567 | /* Get hardware debug state for process PID. */ | |
568 | ||
569 | static struct s390_debug_reg_state * | |
570 | s390_get_debug_reg_state (pid_t pid) | |
571 | { | |
572 | return &s390_process_info_get (pid)->state; | |
573 | } | |
574 | ||
575 | /* Called whenever GDB is no longer debugging process PID. It deletes | |
576 | data structures that keep track of hardware debug state. */ | |
577 | ||
578 | static void | |
579 | s390_forget_process (pid_t pid) | |
580 | { | |
581 | struct s390_process_info *proc, **proc_link; | |
582 | ||
583 | proc = s390_process_list; | |
584 | proc_link = &s390_process_list; | |
585 | ||
586 | while (proc != NULL) | |
587 | { | |
588 | if (proc->pid == pid) | |
589 | { | |
590 | VEC_free (s390_watch_area, proc->state.watch_areas); | |
8193adea | 591 | VEC_free (s390_watch_area, proc->state.break_areas); |
373c3dad AA |
592 | *proc_link = proc->next; |
593 | xfree (proc); | |
594 | return; | |
595 | } | |
596 | ||
597 | proc_link = &proc->next; | |
598 | proc = *proc_link; | |
599 | } | |
600 | } | |
601 | ||
602 | /* linux_nat_new_fork hook. */ | |
603 | ||
604 | static void | |
605 | s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid) | |
606 | { | |
607 | pid_t parent_pid; | |
608 | struct s390_debug_reg_state *parent_state; | |
609 | struct s390_debug_reg_state *child_state; | |
610 | ||
611 | /* NULL means no watchpoint has ever been set in the parent. In | |
612 | that case, there's nothing to do. */ | |
613 | if (lwp_arch_private_info (parent) == NULL) | |
614 | return; | |
615 | ||
616 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
617 | the parent. So copy the debug state from parent to child. */ | |
618 | ||
619 | parent_pid = ptid_get_pid (parent->ptid); | |
620 | parent_state = s390_get_debug_reg_state (parent_pid); | |
621 | child_state = s390_get_debug_reg_state (child_pid); | |
622 | ||
623 | child_state->watch_areas = VEC_copy (s390_watch_area, | |
624 | parent_state->watch_areas); | |
8193adea AA |
625 | child_state->break_areas = VEC_copy (s390_watch_area, |
626 | parent_state->break_areas); | |
373c3dad | 627 | } |
5769d3cd | 628 | |
169fe0df AA |
629 | /* Dump PER state. */ |
630 | ||
631 | static void | |
632 | s390_show_debug_regs (int tid, const char *where) | |
633 | { | |
634 | per_struct per_info; | |
635 | ptrace_area parea; | |
636 | ||
637 | parea.len = sizeof (per_info); | |
638 | parea.process_addr = (addr_t) &per_info; | |
639 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
640 | ||
641 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
642 | perror_with_name (_("Couldn't retrieve debug regs")); | |
643 | ||
644 | debug_printf ("PER (debug) state for %d -- %s\n" | |
645 | " cr9-11: %lx %lx %lx\n" | |
646 | " start, end: %lx %lx\n" | |
647 | " code/ATMID: %x address: %lx PAID: %x\n", | |
648 | tid, | |
649 | where, | |
650 | per_info.control_regs.words.cr[0], | |
651 | per_info.control_regs.words.cr[1], | |
652 | per_info.control_regs.words.cr[2], | |
653 | per_info.starting_addr, | |
654 | per_info.ending_addr, | |
655 | per_info.lowcore.words.perc_atmid, | |
656 | per_info.lowcore.words.address, | |
657 | per_info.lowcore.words.access_id); | |
658 | } | |
659 | ||
f6ac5f3d PA |
660 | int |
661 | s390_linux_nat_target::stopped_by_watchpoint () | |
5769d3cd | 662 | { |
373c3dad AA |
663 | struct s390_debug_reg_state *state |
664 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
5769d3cd AC |
665 | per_lowcore_bits per_lowcore; |
666 | ptrace_area parea; | |
9f0bdab8 | 667 | int result; |
5769d3cd | 668 | |
169fe0df AA |
669 | if (show_debug_regs) |
670 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
671 | ||
e1457d83 | 672 | /* Speed up common case. */ |
373c3dad | 673 | if (VEC_empty (s390_watch_area, state->watch_areas)) |
e1457d83 JB |
674 | return 0; |
675 | ||
5769d3cd AC |
676 | parea.len = sizeof (per_lowcore); |
677 | parea.process_addr = (addr_t) & per_lowcore; | |
678 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 679 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 680 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 681 | |
9f0bdab8 DJ |
682 | result = (per_lowcore.perc_storage_alteration == 1 |
683 | && per_lowcore.perc_store_real_address == 0); | |
684 | ||
685 | if (result) | |
686 | { | |
687 | /* Do not report this watchpoint again. */ | |
688 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 689 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
690 | perror_with_name (_("Couldn't clear watchpoint status")); |
691 | } | |
692 | ||
693 | return result; | |
e1457d83 | 694 | } |
5769d3cd | 695 | |
18396193 AA |
696 | /* Each time before resuming a thread, update its PER info. */ |
697 | ||
e1457d83 | 698 | static void |
18396193 | 699 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 700 | { |
9f0bdab8 | 701 | int tid; |
373c3dad | 702 | pid_t pid = ptid_get_pid (ptid_of_lwp (lp)); |
e1457d83 | 703 | |
5769d3cd AC |
704 | per_struct per_info; |
705 | ptrace_area parea; | |
706 | ||
e1457d83 | 707 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
17c84cca AA |
708 | unsigned ix; |
709 | s390_watch_area *area; | |
9c2996c9 | 710 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 711 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 712 | int step = lwp_is_stepping (lp); |
e1457d83 | 713 | |
8193adea AA |
714 | /* Nothing to do if there was never any PER info for this thread. */ |
715 | if (lp_priv == NULL) | |
18396193 AA |
716 | return; |
717 | ||
8193adea AA |
718 | /* If PER info has changed, update it. When single-stepping, disable |
719 | hardware breakpoints (if any). Otherwise we're done. */ | |
720 | if (!lp_priv->per_info_changed) | |
721 | { | |
722 | if (!step || VEC_empty (s390_watch_area, state->break_areas)) | |
723 | return; | |
724 | } | |
725 | ||
9c2996c9 | 726 | lp_priv->per_info_changed = 0; |
18396193 | 727 | |
9c2996c9 | 728 | tid = ptid_get_lwp (ptid_of_lwp (lp)); |
9f0bdab8 | 729 | if (tid == 0) |
373c3dad | 730 | tid = pid; |
9f0bdab8 | 731 | |
5769d3cd AC |
732 | parea.len = sizeof (per_info); |
733 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 734 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
735 | |
736 | /* Clear PER info, but adjust the single_step field (used by older | |
737 | kernels only). */ | |
738 | memset (&per_info, 0, sizeof (per_info)); | |
739 | per_info.single_step = (step != 0); | |
e1457d83 | 740 | |
373c3dad | 741 | if (!VEC_empty (s390_watch_area, state->watch_areas)) |
5769d3cd | 742 | { |
17c84cca | 743 | for (ix = 0; |
373c3dad | 744 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca AA |
745 | ix++) |
746 | { | |
325fac50 PA |
747 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
748 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
17c84cca AA |
749 | } |
750 | ||
8193adea AA |
751 | /* Enable storage-alteration events. */ |
752 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
753 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 754 | } |
8193adea AA |
755 | |
756 | if (!VEC_empty (s390_watch_area, state->break_areas)) | |
5769d3cd | 757 | { |
8193adea AA |
758 | /* Don't install hardware breakpoints while single-stepping, since |
759 | our PER settings (e.g. the nullification bit) might then conflict | |
760 | with the kernel's. But re-install them afterwards. */ | |
761 | if (step) | |
762 | lp_priv->per_info_changed = 1; | |
763 | else | |
764 | { | |
765 | for (ix = 0; | |
766 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
767 | ix++) | |
768 | { | |
325fac50 PA |
769 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
770 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
8193adea AA |
771 | } |
772 | ||
773 | /* If there's just one breakpoint, enable instruction-fetching | |
774 | nullification events for the breakpoint address (fast). | |
775 | Otherwise stop after any instruction within the PER area and | |
776 | after any branch into it (slow). */ | |
777 | if (watch_hi_addr == watch_lo_addr) | |
778 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
779 | | PER_EVENT_IFETCH); | |
780 | else | |
781 | { | |
782 | /* The PER area must include the instruction before the | |
783 | first breakpoint address. */ | |
784 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
785 | per_info.control_regs.words.cr[0] | |
786 | |= (PER_EVENT_BRANCH | |
787 | | PER_EVENT_IFETCH | |
788 | | PER_CONTROL_BRANCH_ADDRESS); | |
789 | } | |
790 | } | |
5769d3cd AC |
791 | } |
792 | per_info.starting_addr = watch_lo_addr; | |
793 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 794 | |
2b4cab86 | 795 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 796 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
797 | |
798 | if (show_debug_regs) | |
799 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
800 | } |
801 | ||
9c2996c9 | 802 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
803 | |
804 | static void | |
9c2996c9 | 805 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 806 | { |
9c2996c9 AA |
807 | if (lwp_arch_private_info (lp) == NULL) |
808 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 809 | |
9c2996c9 | 810 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
811 | } |
812 | ||
813 | /* When attaching to a new thread, mark its PER info as changed. */ | |
814 | ||
815 | static void | |
816 | s390_new_thread (struct lwp_info *lp) | |
817 | { | |
9c2996c9 AA |
818 | s390_mark_per_info_changed (lp); |
819 | } | |
820 | ||
466eecee SM |
821 | /* Function to call when a thread is being deleted. */ |
822 | ||
823 | static void | |
824 | s390_delete_thread (struct arch_lwp_info *arch_lwp) | |
825 | { | |
826 | xfree (arch_lwp); | |
827 | } | |
828 | ||
9c2996c9 AA |
829 | /* Iterator callback for s390_refresh_per_info. */ |
830 | ||
831 | static int | |
832 | s390_refresh_per_info_cb (struct lwp_info *lp, void *arg) | |
833 | { | |
834 | s390_mark_per_info_changed (lp); | |
835 | ||
836 | if (!lwp_is_stopped (lp)) | |
837 | linux_stop_lwp (lp); | |
838 | return 0; | |
839 | } | |
840 | ||
841 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
842 | ||
843 | static int | |
844 | s390_refresh_per_info (void) | |
845 | { | |
846 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (current_lwp_ptid ())); | |
847 | ||
848 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL); | |
849 | return 0; | |
18396193 AA |
850 | } |
851 | ||
f6ac5f3d PA |
852 | int |
853 | s390_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len, | |
854 | enum target_hw_bp_type type, | |
855 | struct expression *cond) | |
5769d3cd | 856 | { |
17c84cca | 857 | s390_watch_area area; |
373c3dad AA |
858 | struct s390_debug_reg_state *state |
859 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
9f0bdab8 | 860 | |
17c84cca AA |
861 | area.lo_addr = addr; |
862 | area.hi_addr = addr + len - 1; | |
373c3dad | 863 | VEC_safe_push (s390_watch_area, state->watch_areas, &area); |
e1457d83 | 864 | |
9c2996c9 | 865 | return s390_refresh_per_info (); |
5769d3cd AC |
866 | } |
867 | ||
f6ac5f3d PA |
868 | int |
869 | s390_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len, | |
870 | enum target_hw_bp_type type, | |
871 | struct expression *cond) | |
5769d3cd | 872 | { |
17c84cca AA |
873 | unsigned ix; |
874 | s390_watch_area *area; | |
373c3dad AA |
875 | struct s390_debug_reg_state *state |
876 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
e1457d83 | 877 | |
17c84cca | 878 | for (ix = 0; |
373c3dad | 879 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca | 880 | ix++) |
5769d3cd | 881 | { |
17c84cca AA |
882 | if (area->lo_addr == addr && area->hi_addr == addr + len - 1) |
883 | { | |
373c3dad | 884 | VEC_unordered_remove (s390_watch_area, state->watch_areas, ix); |
17c84cca AA |
885 | return s390_refresh_per_info (); |
886 | } | |
5769d3cd | 887 | } |
e1457d83 | 888 | |
17c84cca AA |
889 | fprintf_unfiltered (gdb_stderr, |
890 | "Attempt to remove nonexistent watchpoint.\n"); | |
891 | return -1; | |
5769d3cd AC |
892 | } |
893 | ||
8193adea AA |
894 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
895 | ||
f6ac5f3d PA |
896 | int |
897 | s390_linux_nat_target::can_use_hw_breakpoint (enum bptype type, | |
898 | int cnt, int othertype) | |
fd7979d1 | 899 | { |
8193adea AA |
900 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
901 | return 1; | |
902 | return 0; | |
903 | } | |
904 | ||
905 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
906 | ||
f6ac5f3d PA |
907 | int |
908 | s390_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch, | |
909 | struct bp_target_info *bp_tgt) | |
8193adea AA |
910 | { |
911 | s390_watch_area area; | |
912 | struct s390_debug_reg_state *state; | |
913 | ||
914 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
915 | area.hi_addr = area.lo_addr; | |
916 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
917 | VEC_safe_push (s390_watch_area, state->break_areas, &area); | |
918 | ||
919 | return s390_refresh_per_info (); | |
920 | } | |
921 | ||
922 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
923 | ||
f6ac5f3d PA |
924 | int |
925 | s390_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch, | |
926 | struct bp_target_info *bp_tgt) | |
8193adea AA |
927 | { |
928 | unsigned ix; | |
929 | struct watch_area *area; | |
930 | struct s390_debug_reg_state *state; | |
931 | ||
932 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
933 | for (ix = 0; | |
934 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
935 | ix++) | |
936 | { | |
937 | if (area->lo_addr == bp_tgt->placed_address) | |
938 | { | |
939 | VEC_unordered_remove (s390_watch_area, state->break_areas, ix); | |
940 | return s390_refresh_per_info (); | |
941 | } | |
942 | } | |
943 | ||
944 | fprintf_unfiltered (gdb_stderr, | |
945 | "Attempt to remove nonexistent breakpoint.\n"); | |
946 | return -1; | |
fd7979d1 | 947 | } |
e1457d83 | 948 | |
f6ac5f3d PA |
949 | int |
950 | s390_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt) | |
5769d3cd | 951 | { |
fd7979d1 | 952 | return 1; |
5769d3cd AC |
953 | } |
954 | ||
7803799a UW |
955 | static int |
956 | s390_target_wordsize (void) | |
957 | { | |
958 | int wordsize = 4; | |
959 | ||
960 | /* Check for 64-bit inferior process. This is the case when the host is | |
961 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
962 | #ifdef __s390x__ | |
963 | long pswm; | |
964 | ||
965 | errno = 0; | |
966 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
967 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
968 | wordsize = 8; | |
969 | #endif | |
970 | ||
971 | return wordsize; | |
972 | } | |
973 | ||
f6ac5f3d PA |
974 | int |
975 | s390_linux_nat_target::auxv_parse (gdb_byte **readptr, | |
976 | gdb_byte *endptr, CORE_ADDR *typep, | |
977 | CORE_ADDR *valp) | |
7803799a UW |
978 | { |
979 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 980 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
981 | gdb_byte *ptr = *readptr; |
982 | ||
983 | if (endptr == ptr) | |
984 | return 0; | |
985 | ||
986 | if (endptr - ptr < sizeof_auxv_field * 2) | |
987 | return -1; | |
988 | ||
989 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
990 | ptr += sizeof_auxv_field; | |
991 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
992 | ptr += sizeof_auxv_field; | |
993 | ||
994 | *readptr = ptr; | |
995 | return 1; | |
996 | } | |
997 | ||
f6ac5f3d PA |
998 | const struct target_desc * |
999 | s390_linux_nat_target::read_description () | |
7803799a | 1000 | { |
c642a434 UW |
1001 | int tid = s390_inferior_tid (); |
1002 | ||
1003 | have_regset_last_break | |
1004 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
1005 | have_regset_system_call | |
1006 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
1007 | ||
7803799a UW |
1008 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
1009 | z/Architecture mode. If the target is running in 64-bit addressing | |
1010 | mode, report s390x architecture. If the target is running in 31-bit | |
1011 | addressing mode, but the kernel supports using 64-bit registers in | |
1012 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
1013 | #ifdef __s390x__ |
1014 | { | |
1015 | CORE_ADDR hwcap = 0; | |
1016 | ||
f6ac5f3d | 1017 | target_auxv_search (target_stack, AT_HWCAP, &hwcap); |
550bdf96 AA |
1018 | have_regset_tdb = (hwcap & HWCAP_S390_TE) |
1019 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
1020 | ||
1021 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
1022 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
1023 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
1024 | ||
1b63490c AA |
1025 | have_regset_gs = (hwcap & HWCAP_S390_GS) |
1026 | && check_regset (tid, NT_S390_GS_CB, 4 * 8) | |
1027 | && check_regset (tid, NT_S390_GS_BC, 4 * 8); | |
1028 | ||
550bdf96 | 1029 | if (s390_target_wordsize () == 8) |
1b63490c AA |
1030 | return (have_regset_gs ? tdesc_s390x_gs_linux64 : |
1031 | have_regset_vxrs ? | |
550bdf96 AA |
1032 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
1033 | tdesc_s390x_vx_linux64) : | |
1034 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
1035 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
1036 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
1037 | tdesc_s390x_linux64); | |
1038 | ||
1039 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
1b63490c AA |
1040 | return (have_regset_gs ? tdesc_s390_gs_linux64 : |
1041 | have_regset_vxrs ? | |
550bdf96 AA |
1042 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
1043 | tdesc_s390_vx_linux64) : | |
1044 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
1045 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
1046 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
1047 | tdesc_s390_linux64); | |
1048 | } | |
7803799a UW |
1049 | #endif |
1050 | ||
1051 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
1052 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
1053 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
1054 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
1055 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1056 | tdesc_s390_linux32); | |
7803799a | 1057 | } |
fd7979d1 | 1058 | |
10d6c8cd DJ |
1059 | void |
1060 | _initialize_s390_nat (void) | |
1061 | { | |
f6ac5f3d | 1062 | struct target_ops *t = &the_s390_linux_nat_target; |
7803799a | 1063 | |
10d6c8cd | 1064 | /* Register the target. */ |
f6ac5f3d PA |
1065 | linux_target = &the_s390_linux_nat_target; |
1066 | add_target (t); | |
18396193 | 1067 | linux_nat_set_new_thread (t, s390_new_thread); |
466eecee | 1068 | linux_nat_set_delete_thread (t, s390_delete_thread); |
18396193 | 1069 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); |
373c3dad AA |
1070 | linux_nat_set_forget_process (t, s390_forget_process); |
1071 | linux_nat_set_new_fork (t, s390_linux_new_fork); | |
169fe0df AA |
1072 | |
1073 | /* A maintenance command to enable showing the PER state. */ | |
1074 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1075 | &show_debug_regs, _("\ | |
1076 | Set whether to show the PER (debug) hardware state."), _("\ | |
1077 | Show whether to show the PER (debug) hardware state."), _("\ | |
1078 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1079 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1080 | and when the inferior triggers a breakpoint or watchpoint."), | |
1081 | NULL, | |
1082 | NULL, | |
1083 | &maintenance_set_cmdlist, | |
1084 | &maintenance_show_cmdlist); | |
10d6c8cd | 1085 | } |