Commit | Line | Data |
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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
618f726f | 2 | Copyright (C) 2001-2016 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 UW |
41 | #include <elf.h> |
42 | ||
18396193 AA |
43 | /* Per-thread arch-specific data. */ |
44 | ||
45 | struct arch_lwp_info | |
46 | { | |
47 | /* Non-zero if the thread's PER info must be re-written. */ | |
48 | int per_info_changed; | |
49 | }; | |
50 | ||
c642a434 UW |
51 | static int have_regset_last_break = 0; |
52 | static int have_regset_system_call = 0; | |
4ac33720 | 53 | static int have_regset_tdb = 0; |
550bdf96 | 54 | static int have_regset_vxrs = 0; |
5769d3cd | 55 | |
99b7da5d AA |
56 | /* Register map for 32-bit executables running under a 64-bit |
57 | kernel. */ | |
d0f54f9d JB |
58 | |
59 | #ifdef __s390x__ | |
99b7da5d AA |
60 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
61 | { | |
62 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
63 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
64 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
65 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
66 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
67 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
68 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
69 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
70 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
71 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
72 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
73 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
74 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
75 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
76 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
77 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
78 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
79 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
80 | { 16, S390_A0_REGNUM, 4 }, | |
81 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
82 | { 0 } | |
83 | }; | |
84 | ||
85 | static const struct regset s390_64_gregset = | |
86 | { | |
87 | s390_64_regmap_gregset, | |
88 | regcache_supply_regset, | |
89 | regcache_collect_regset | |
90 | }; | |
91 | ||
92 | #define S390_PSWM_OFFSET 0 | |
93 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 94 | #endif |
d0f54f9d | 95 | |
8193adea AA |
96 | /* PER-event mask bits and PER control bits (CR9). */ |
97 | ||
98 | #define PER_BIT(n) (1UL << (63 - (n))) | |
99 | #define PER_EVENT_BRANCH PER_BIT (32) | |
100 | #define PER_EVENT_IFETCH PER_BIT (33) | |
101 | #define PER_EVENT_STORE PER_BIT (34) | |
102 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
103 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
104 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
105 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
106 | ||
107 | ||
2ccd1468 UW |
108 | /* Fill GDB's register array with the general-purpose register values |
109 | in *REGP. | |
110 | ||
111 | When debugging a 32-bit executable running under a 64-bit kernel, | |
112 | we have to fix up the 64-bit registers we get from the kernel to | |
113 | make them look like 32-bit registers. */ | |
d6db1fab | 114 | |
2ccd1468 UW |
115 | void |
116 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
117 | { | |
9cbd5950 | 118 | #ifdef __s390x__ |
d6db1fab | 119 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
2ccd1468 | 120 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
121 | { |
122 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 123 | ULONGEST pswm, pswa; |
2ccd1468 | 124 | gdb_byte buf[4]; |
d6db1fab | 125 | |
99b7da5d AA |
126 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
127 | regp, sizeof (gregset_t)); | |
128 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
129 | + S390_PSWM_OFFSET, 8, byte_order); | |
130 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
131 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
132 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
133 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
134 | store_unsigned_integer (buf, 4, byte_order, | |
135 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
136 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
137 | return; | |
d6db1fab UW |
138 | } |
139 | #endif | |
140 | ||
99b7da5d AA |
141 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
142 | sizeof (gregset_t)); | |
d6db1fab UW |
143 | } |
144 | ||
2ccd1468 UW |
145 | /* Fill register REGNO (if it is a general-purpose register) in |
146 | *REGP with the value in GDB's register array. If REGNO is -1, | |
147 | do this for all registers. */ | |
d6db1fab | 148 | |
2ccd1468 UW |
149 | void |
150 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
151 | { | |
d6db1fab UW |
152 | #ifdef __s390x__ |
153 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2ccd1468 | 154 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 155 | { |
99b7da5d AA |
156 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
157 | regp, sizeof (gregset_t)); | |
d6db1fab | 158 | |
2ccd1468 UW |
159 | if (regno == -1 |
160 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 161 | { |
2ccd1468 UW |
162 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
163 | ULONGEST pswa, pswm; | |
d6db1fab | 164 | gdb_byte buf[4]; |
2492f0d0 AA |
165 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
166 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 167 | |
2492f0d0 | 168 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 169 | |
2ccd1468 | 170 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
171 | { |
172 | pswm &= 0x80000000; | |
173 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); | |
174 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) | |
175 | & 0xfff7ffff) << 32; | |
176 | } | |
177 | ||
2ccd1468 | 178 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 AA |
179 | { |
180 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
181 | pswa = extract_unsigned_integer (buf, 4, byte_order); | |
182 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
183 | pswa &= 0x7fffffff; | |
184 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
185 | } | |
186 | ||
187 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 188 | } |
2ccd1468 | 189 | return; |
d6db1fab | 190 | } |
9cbd5950 JB |
191 | #endif |
192 | ||
99b7da5d AA |
193 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
194 | sizeof (gregset_t)); | |
d0f54f9d JB |
195 | } |
196 | ||
197 | /* Fill GDB's register array with the floating-point register values | |
198 | in *REGP. */ | |
199 | void | |
7f7fe91e | 200 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 201 | { |
99b7da5d AA |
202 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
203 | sizeof (fpregset_t)); | |
d0f54f9d JB |
204 | } |
205 | ||
206 | /* Fill register REGNO (if it is a general-purpose register) in | |
207 | *REGP with the value in GDB's register array. If REGNO is -1, | |
208 | do this for all registers. */ | |
209 | void | |
7f7fe91e | 210 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 211 | { |
99b7da5d AA |
212 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
213 | sizeof (fpregset_t)); | |
d0f54f9d JB |
214 | } |
215 | ||
216 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
217 | static int | |
218 | s390_inferior_tid (void) | |
219 | { | |
220 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 221 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 222 | if (tid == 0) |
dfd4cc63 | 223 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
224 | |
225 | return tid; | |
226 | } | |
227 | ||
228 | /* Fetch all general-purpose registers from process/thread TID and | |
229 | store their values in GDB's register cache. */ | |
230 | static void | |
56be3814 | 231 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
232 | { |
233 | gregset_t regs; | |
234 | ptrace_area parea; | |
235 | ||
236 | parea.len = sizeof (regs); | |
237 | parea.process_addr = (addr_t) ®s; | |
238 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 239 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 240 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 241 | |
56be3814 | 242 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
243 | } |
244 | ||
245 | /* Store all valid general-purpose registers in GDB's register cache | |
246 | into the process/thread specified by TID. */ | |
247 | static void | |
56be3814 | 248 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
249 | { |
250 | gregset_t regs; | |
251 | ptrace_area parea; | |
252 | ||
253 | parea.len = sizeof (regs); | |
254 | parea.process_addr = (addr_t) ®s; | |
255 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 256 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 257 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 258 | |
56be3814 | 259 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 260 | |
2b4cab86 | 261 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 262 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
263 | } |
264 | ||
265 | /* Fetch all floating-point registers from process/thread TID and store | |
266 | their values in GDB's register cache. */ | |
267 | static void | |
56be3814 | 268 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
269 | { |
270 | fpregset_t fpregs; | |
271 | ptrace_area parea; | |
272 | ||
273 | parea.len = sizeof (fpregs); | |
274 | parea.process_addr = (addr_t) &fpregs; | |
275 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 276 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 277 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 278 | |
56be3814 | 279 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
280 | } |
281 | ||
282 | /* Store all valid floating-point registers in GDB's register cache | |
283 | into the process/thread specified by TID. */ | |
284 | static void | |
56be3814 | 285 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
286 | { |
287 | fpregset_t fpregs; | |
288 | ptrace_area parea; | |
289 | ||
290 | parea.len = sizeof (fpregs); | |
291 | parea.process_addr = (addr_t) &fpregs; | |
292 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 293 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 294 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 295 | |
56be3814 | 296 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 297 | |
2b4cab86 | 298 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 299 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
300 | } |
301 | ||
99b7da5d AA |
302 | /* Fetch all registers in the kernel's register set whose number is |
303 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
304 | REGSET, from process/thread TID and store their values in GDB's | |
305 | register cache. */ | |
c642a434 UW |
306 | static void |
307 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 308 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 309 | { |
3451269c | 310 | void *buf = alloca (regsize); |
c642a434 | 311 | struct iovec iov; |
c642a434 UW |
312 | |
313 | iov.iov_base = buf; | |
314 | iov.iov_len = regsize; | |
315 | ||
99b7da5d | 316 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
317 | { |
318 | if (errno == ENODATA) | |
99b7da5d | 319 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
320 | else |
321 | perror_with_name (_("Couldn't get register set")); | |
322 | } | |
323 | else | |
99b7da5d | 324 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
325 | } |
326 | ||
99b7da5d AA |
327 | /* Store all registers in the kernel's register set whose number is |
328 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
329 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
330 | static void |
331 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 332 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 333 | { |
3451269c | 334 | void *buf = alloca (regsize); |
c642a434 | 335 | struct iovec iov; |
c642a434 UW |
336 | |
337 | iov.iov_base = buf; | |
338 | iov.iov_len = regsize; | |
339 | ||
99b7da5d | 340 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
341 | perror_with_name (_("Couldn't get register set")); |
342 | ||
99b7da5d | 343 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 344 | |
99b7da5d | 345 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
346 | perror_with_name (_("Couldn't set register set")); |
347 | } | |
348 | ||
349 | /* Check whether the kernel provides a register set with number REGSET | |
350 | of size REGSIZE for process/thread TID. */ | |
351 | static int | |
352 | check_regset (int tid, int regset, int regsize) | |
353 | { | |
3451269c | 354 | void *buf = alloca (regsize); |
c642a434 UW |
355 | struct iovec iov; |
356 | ||
357 | iov.iov_base = buf; | |
358 | iov.iov_len = regsize; | |
359 | ||
4ac33720 UW |
360 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
361 | || errno == ENODATA) | |
c642a434 | 362 | return 1; |
4ac33720 | 363 | return 0; |
c642a434 UW |
364 | } |
365 | ||
d0f54f9d JB |
366 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
367 | this for all registers. */ | |
10d6c8cd | 368 | static void |
28439f5e PA |
369 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
370 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
371 | { |
372 | int tid = s390_inferior_tid (); | |
373 | ||
2ccd1468 | 374 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 375 | fetch_regs (regcache, tid); |
d0f54f9d | 376 | |
2ccd1468 | 377 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 378 | fetch_fpregs (regcache, tid); |
c642a434 UW |
379 | |
380 | if (have_regset_last_break) | |
381 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
382 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
383 | (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32 | |
99b7da5d | 384 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
385 | |
386 | if (have_regset_system_call) | |
387 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
388 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 389 | &s390_system_call_regset); |
4ac33720 UW |
390 | |
391 | if (have_regset_tdb) | |
392 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
393 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 394 | &s390_tdb_regset); |
550bdf96 AA |
395 | |
396 | if (have_regset_vxrs) | |
397 | { | |
398 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
399 | && regnum <= S390_V15_LOWER_REGNUM)) | |
400 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
401 | &s390_vxrs_low_regset); | |
402 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
403 | && regnum <= S390_V31_REGNUM)) | |
404 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
405 | &s390_vxrs_high_regset); | |
406 | } | |
d0f54f9d JB |
407 | } |
408 | ||
409 | /* Store register REGNUM back into the child process. If REGNUM is | |
410 | -1, do this for all registers. */ | |
10d6c8cd | 411 | static void |
28439f5e PA |
412 | s390_linux_store_inferior_registers (struct target_ops *ops, |
413 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
414 | { |
415 | int tid = s390_inferior_tid (); | |
416 | ||
2ccd1468 | 417 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 418 | store_regs (regcache, tid, regnum); |
d0f54f9d | 419 | |
2ccd1468 | 420 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 421 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
422 | |
423 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
424 | ||
425 | if (have_regset_system_call) | |
426 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
427 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 428 | &s390_system_call_regset); |
550bdf96 AA |
429 | |
430 | if (have_regset_vxrs) | |
431 | { | |
432 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
433 | && regnum <= S390_V15_LOWER_REGNUM)) | |
434 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
435 | &s390_vxrs_low_regset); | |
436 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
437 | && regnum <= S390_V31_REGNUM)) | |
438 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
439 | &s390_vxrs_high_regset); | |
440 | } | |
5769d3cd AC |
441 | } |
442 | ||
d0f54f9d | 443 | |
e1457d83 JB |
444 | /* Hardware-assisted watchpoint handling. */ |
445 | ||
373c3dad AA |
446 | /* For each process we maintain a list of all currently active |
447 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
448 | |
449 | The only thing we actually need is the total address space area | |
450 | spanned by the watchpoints. */ | |
451 | ||
17c84cca | 452 | typedef struct watch_area |
5769d3cd | 453 | { |
5769d3cd AC |
454 | CORE_ADDR lo_addr; |
455 | CORE_ADDR hi_addr; | |
17c84cca AA |
456 | } s390_watch_area; |
457 | ||
458 | DEF_VEC_O (s390_watch_area); | |
5769d3cd | 459 | |
373c3dad AA |
460 | /* Hardware debug state. */ |
461 | ||
462 | struct s390_debug_reg_state | |
463 | { | |
464 | VEC_s390_watch_area *watch_areas; | |
8193adea | 465 | VEC_s390_watch_area *break_areas; |
373c3dad AA |
466 | }; |
467 | ||
468 | /* Per-process data. */ | |
469 | ||
470 | struct s390_process_info | |
471 | { | |
472 | struct s390_process_info *next; | |
473 | pid_t pid; | |
474 | struct s390_debug_reg_state state; | |
475 | }; | |
476 | ||
477 | static struct s390_process_info *s390_process_list = NULL; | |
478 | ||
479 | /* Find process data for process PID. */ | |
480 | ||
481 | static struct s390_process_info * | |
482 | s390_find_process_pid (pid_t pid) | |
483 | { | |
484 | struct s390_process_info *proc; | |
485 | ||
486 | for (proc = s390_process_list; proc; proc = proc->next) | |
487 | if (proc->pid == pid) | |
488 | return proc; | |
489 | ||
490 | return NULL; | |
491 | } | |
492 | ||
493 | /* Add process data for process PID. Returns newly allocated info | |
494 | object. */ | |
495 | ||
496 | static struct s390_process_info * | |
497 | s390_add_process (pid_t pid) | |
498 | { | |
499 | struct s390_process_info *proc = XCNEW (struct s390_process_info); | |
500 | ||
501 | proc->pid = pid; | |
502 | proc->next = s390_process_list; | |
503 | s390_process_list = proc; | |
504 | ||
505 | return proc; | |
506 | } | |
507 | ||
508 | /* Get data specific info for process PID, creating it if necessary. | |
509 | Never returns NULL. */ | |
510 | ||
511 | static struct s390_process_info * | |
512 | s390_process_info_get (pid_t pid) | |
513 | { | |
514 | struct s390_process_info *proc; | |
515 | ||
516 | proc = s390_find_process_pid (pid); | |
517 | if (proc == NULL) | |
518 | proc = s390_add_process (pid); | |
519 | ||
520 | return proc; | |
521 | } | |
522 | ||
523 | /* Get hardware debug state for process PID. */ | |
524 | ||
525 | static struct s390_debug_reg_state * | |
526 | s390_get_debug_reg_state (pid_t pid) | |
527 | { | |
528 | return &s390_process_info_get (pid)->state; | |
529 | } | |
530 | ||
531 | /* Called whenever GDB is no longer debugging process PID. It deletes | |
532 | data structures that keep track of hardware debug state. */ | |
533 | ||
534 | static void | |
535 | s390_forget_process (pid_t pid) | |
536 | { | |
537 | struct s390_process_info *proc, **proc_link; | |
538 | ||
539 | proc = s390_process_list; | |
540 | proc_link = &s390_process_list; | |
541 | ||
542 | while (proc != NULL) | |
543 | { | |
544 | if (proc->pid == pid) | |
545 | { | |
546 | VEC_free (s390_watch_area, proc->state.watch_areas); | |
8193adea | 547 | VEC_free (s390_watch_area, proc->state.break_areas); |
373c3dad AA |
548 | *proc_link = proc->next; |
549 | xfree (proc); | |
550 | return; | |
551 | } | |
552 | ||
553 | proc_link = &proc->next; | |
554 | proc = *proc_link; | |
555 | } | |
556 | } | |
557 | ||
558 | /* linux_nat_new_fork hook. */ | |
559 | ||
560 | static void | |
561 | s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid) | |
562 | { | |
563 | pid_t parent_pid; | |
564 | struct s390_debug_reg_state *parent_state; | |
565 | struct s390_debug_reg_state *child_state; | |
566 | ||
567 | /* NULL means no watchpoint has ever been set in the parent. In | |
568 | that case, there's nothing to do. */ | |
569 | if (lwp_arch_private_info (parent) == NULL) | |
570 | return; | |
571 | ||
572 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
573 | the parent. So copy the debug state from parent to child. */ | |
574 | ||
575 | parent_pid = ptid_get_pid (parent->ptid); | |
576 | parent_state = s390_get_debug_reg_state (parent_pid); | |
577 | child_state = s390_get_debug_reg_state (child_pid); | |
578 | ||
579 | child_state->watch_areas = VEC_copy (s390_watch_area, | |
580 | parent_state->watch_areas); | |
8193adea AA |
581 | child_state->break_areas = VEC_copy (s390_watch_area, |
582 | parent_state->break_areas); | |
373c3dad | 583 | } |
5769d3cd | 584 | |
169fe0df AA |
585 | /* Dump PER state. */ |
586 | ||
587 | static void | |
588 | s390_show_debug_regs (int tid, const char *where) | |
589 | { | |
590 | per_struct per_info; | |
591 | ptrace_area parea; | |
592 | ||
593 | parea.len = sizeof (per_info); | |
594 | parea.process_addr = (addr_t) &per_info; | |
595 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
596 | ||
597 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
598 | perror_with_name (_("Couldn't retrieve debug regs")); | |
599 | ||
600 | debug_printf ("PER (debug) state for %d -- %s\n" | |
601 | " cr9-11: %lx %lx %lx\n" | |
602 | " start, end: %lx %lx\n" | |
603 | " code/ATMID: %x address: %lx PAID: %x\n", | |
604 | tid, | |
605 | where, | |
606 | per_info.control_regs.words.cr[0], | |
607 | per_info.control_regs.words.cr[1], | |
608 | per_info.control_regs.words.cr[2], | |
609 | per_info.starting_addr, | |
610 | per_info.ending_addr, | |
611 | per_info.lowcore.words.perc_atmid, | |
612 | per_info.lowcore.words.address, | |
613 | per_info.lowcore.words.access_id); | |
614 | } | |
615 | ||
fd7979d1 | 616 | static int |
6a109b6b | 617 | s390_stopped_by_watchpoint (struct target_ops *ops) |
5769d3cd | 618 | { |
373c3dad AA |
619 | struct s390_debug_reg_state *state |
620 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
5769d3cd AC |
621 | per_lowcore_bits per_lowcore; |
622 | ptrace_area parea; | |
9f0bdab8 | 623 | int result; |
5769d3cd | 624 | |
169fe0df AA |
625 | if (show_debug_regs) |
626 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
627 | ||
e1457d83 | 628 | /* Speed up common case. */ |
373c3dad | 629 | if (VEC_empty (s390_watch_area, state->watch_areas)) |
e1457d83 JB |
630 | return 0; |
631 | ||
5769d3cd AC |
632 | parea.len = sizeof (per_lowcore); |
633 | parea.process_addr = (addr_t) & per_lowcore; | |
634 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 635 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 636 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 637 | |
9f0bdab8 DJ |
638 | result = (per_lowcore.perc_storage_alteration == 1 |
639 | && per_lowcore.perc_store_real_address == 0); | |
640 | ||
641 | if (result) | |
642 | { | |
643 | /* Do not report this watchpoint again. */ | |
644 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 645 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
646 | perror_with_name (_("Couldn't clear watchpoint status")); |
647 | } | |
648 | ||
649 | return result; | |
e1457d83 | 650 | } |
5769d3cd | 651 | |
18396193 AA |
652 | /* Each time before resuming a thread, update its PER info. */ |
653 | ||
e1457d83 | 654 | static void |
18396193 | 655 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 656 | { |
9f0bdab8 | 657 | int tid; |
373c3dad | 658 | pid_t pid = ptid_get_pid (ptid_of_lwp (lp)); |
e1457d83 | 659 | |
5769d3cd AC |
660 | per_struct per_info; |
661 | ptrace_area parea; | |
662 | ||
e1457d83 | 663 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
17c84cca AA |
664 | unsigned ix; |
665 | s390_watch_area *area; | |
9c2996c9 | 666 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 667 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 668 | int step = lwp_is_stepping (lp); |
e1457d83 | 669 | |
8193adea AA |
670 | /* Nothing to do if there was never any PER info for this thread. */ |
671 | if (lp_priv == NULL) | |
18396193 AA |
672 | return; |
673 | ||
8193adea AA |
674 | /* If PER info has changed, update it. When single-stepping, disable |
675 | hardware breakpoints (if any). Otherwise we're done. */ | |
676 | if (!lp_priv->per_info_changed) | |
677 | { | |
678 | if (!step || VEC_empty (s390_watch_area, state->break_areas)) | |
679 | return; | |
680 | } | |
681 | ||
9c2996c9 | 682 | lp_priv->per_info_changed = 0; |
18396193 | 683 | |
9c2996c9 | 684 | tid = ptid_get_lwp (ptid_of_lwp (lp)); |
9f0bdab8 | 685 | if (tid == 0) |
373c3dad | 686 | tid = pid; |
9f0bdab8 | 687 | |
5769d3cd AC |
688 | parea.len = sizeof (per_info); |
689 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 690 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
691 | |
692 | /* Clear PER info, but adjust the single_step field (used by older | |
693 | kernels only). */ | |
694 | memset (&per_info, 0, sizeof (per_info)); | |
695 | per_info.single_step = (step != 0); | |
e1457d83 | 696 | |
373c3dad | 697 | if (!VEC_empty (s390_watch_area, state->watch_areas)) |
5769d3cd | 698 | { |
17c84cca | 699 | for (ix = 0; |
373c3dad | 700 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca AA |
701 | ix++) |
702 | { | |
703 | watch_lo_addr = min (watch_lo_addr, area->lo_addr); | |
704 | watch_hi_addr = max (watch_hi_addr, area->hi_addr); | |
705 | } | |
706 | ||
8193adea AA |
707 | /* Enable storage-alteration events. */ |
708 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
709 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 710 | } |
8193adea AA |
711 | |
712 | if (!VEC_empty (s390_watch_area, state->break_areas)) | |
5769d3cd | 713 | { |
8193adea AA |
714 | /* Don't install hardware breakpoints while single-stepping, since |
715 | our PER settings (e.g. the nullification bit) might then conflict | |
716 | with the kernel's. But re-install them afterwards. */ | |
717 | if (step) | |
718 | lp_priv->per_info_changed = 1; | |
719 | else | |
720 | { | |
721 | for (ix = 0; | |
722 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
723 | ix++) | |
724 | { | |
725 | watch_lo_addr = min (watch_lo_addr, area->lo_addr); | |
726 | watch_hi_addr = max (watch_hi_addr, area->hi_addr); | |
727 | } | |
728 | ||
729 | /* If there's just one breakpoint, enable instruction-fetching | |
730 | nullification events for the breakpoint address (fast). | |
731 | Otherwise stop after any instruction within the PER area and | |
732 | after any branch into it (slow). */ | |
733 | if (watch_hi_addr == watch_lo_addr) | |
734 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
735 | | PER_EVENT_IFETCH); | |
736 | else | |
737 | { | |
738 | /* The PER area must include the instruction before the | |
739 | first breakpoint address. */ | |
740 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
741 | per_info.control_regs.words.cr[0] | |
742 | |= (PER_EVENT_BRANCH | |
743 | | PER_EVENT_IFETCH | |
744 | | PER_CONTROL_BRANCH_ADDRESS); | |
745 | } | |
746 | } | |
5769d3cd AC |
747 | } |
748 | per_info.starting_addr = watch_lo_addr; | |
749 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 750 | |
2b4cab86 | 751 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 752 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
753 | |
754 | if (show_debug_regs) | |
755 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
756 | } |
757 | ||
9c2996c9 | 758 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
759 | |
760 | static void | |
9c2996c9 | 761 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 762 | { |
9c2996c9 AA |
763 | if (lwp_arch_private_info (lp) == NULL) |
764 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 765 | |
9c2996c9 | 766 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
767 | } |
768 | ||
769 | /* When attaching to a new thread, mark its PER info as changed. */ | |
770 | ||
771 | static void | |
772 | s390_new_thread (struct lwp_info *lp) | |
773 | { | |
9c2996c9 AA |
774 | s390_mark_per_info_changed (lp); |
775 | } | |
776 | ||
777 | /* Iterator callback for s390_refresh_per_info. */ | |
778 | ||
779 | static int | |
780 | s390_refresh_per_info_cb (struct lwp_info *lp, void *arg) | |
781 | { | |
782 | s390_mark_per_info_changed (lp); | |
783 | ||
784 | if (!lwp_is_stopped (lp)) | |
785 | linux_stop_lwp (lp); | |
786 | return 0; | |
787 | } | |
788 | ||
789 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
790 | ||
791 | static int | |
792 | s390_refresh_per_info (void) | |
793 | { | |
794 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (current_lwp_ptid ())); | |
795 | ||
796 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL); | |
797 | return 0; | |
18396193 AA |
798 | } |
799 | ||
fd7979d1 | 800 | static int |
7bb99c53 | 801 | s390_insert_watchpoint (struct target_ops *self, |
f486487f | 802 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 803 | struct expression *cond) |
5769d3cd | 804 | { |
17c84cca | 805 | s390_watch_area area; |
373c3dad AA |
806 | struct s390_debug_reg_state *state |
807 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
9f0bdab8 | 808 | |
17c84cca AA |
809 | area.lo_addr = addr; |
810 | area.hi_addr = addr + len - 1; | |
373c3dad | 811 | VEC_safe_push (s390_watch_area, state->watch_areas, &area); |
e1457d83 | 812 | |
9c2996c9 | 813 | return s390_refresh_per_info (); |
5769d3cd AC |
814 | } |
815 | ||
fd7979d1 | 816 | static int |
11b5219a | 817 | s390_remove_watchpoint (struct target_ops *self, |
f486487f | 818 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 819 | struct expression *cond) |
5769d3cd | 820 | { |
17c84cca AA |
821 | unsigned ix; |
822 | s390_watch_area *area; | |
373c3dad AA |
823 | struct s390_debug_reg_state *state |
824 | = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
e1457d83 | 825 | |
17c84cca | 826 | for (ix = 0; |
373c3dad | 827 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca | 828 | ix++) |
5769d3cd | 829 | { |
17c84cca AA |
830 | if (area->lo_addr == addr && area->hi_addr == addr + len - 1) |
831 | { | |
373c3dad | 832 | VEC_unordered_remove (s390_watch_area, state->watch_areas, ix); |
17c84cca AA |
833 | return s390_refresh_per_info (); |
834 | } | |
5769d3cd | 835 | } |
e1457d83 | 836 | |
17c84cca AA |
837 | fprintf_unfiltered (gdb_stderr, |
838 | "Attempt to remove nonexistent watchpoint.\n"); | |
839 | return -1; | |
5769d3cd AC |
840 | } |
841 | ||
8193adea AA |
842 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
843 | ||
fd7979d1 | 844 | static int |
5461485a | 845 | s390_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 846 | enum bptype type, int cnt, int othertype) |
fd7979d1 | 847 | { |
8193adea AA |
848 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
849 | return 1; | |
850 | return 0; | |
851 | } | |
852 | ||
853 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
854 | ||
855 | static int | |
856 | s390_insert_hw_breakpoint (struct target_ops *self, | |
857 | struct gdbarch *gdbarch, | |
858 | struct bp_target_info *bp_tgt) | |
859 | { | |
860 | s390_watch_area area; | |
861 | struct s390_debug_reg_state *state; | |
862 | ||
863 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
864 | area.hi_addr = area.lo_addr; | |
865 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
866 | VEC_safe_push (s390_watch_area, state->break_areas, &area); | |
867 | ||
868 | return s390_refresh_per_info (); | |
869 | } | |
870 | ||
871 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
872 | ||
873 | static int | |
874 | s390_remove_hw_breakpoint (struct target_ops *self, | |
875 | struct gdbarch *gdbarch, | |
876 | struct bp_target_info *bp_tgt) | |
877 | { | |
878 | unsigned ix; | |
879 | struct watch_area *area; | |
880 | struct s390_debug_reg_state *state; | |
881 | ||
882 | state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid)); | |
883 | for (ix = 0; | |
884 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
885 | ix++) | |
886 | { | |
887 | if (area->lo_addr == bp_tgt->placed_address) | |
888 | { | |
889 | VEC_unordered_remove (s390_watch_area, state->break_areas, ix); | |
890 | return s390_refresh_per_info (); | |
891 | } | |
892 | } | |
893 | ||
894 | fprintf_unfiltered (gdb_stderr, | |
895 | "Attempt to remove nonexistent breakpoint.\n"); | |
896 | return -1; | |
fd7979d1 | 897 | } |
e1457d83 | 898 | |
fd7979d1 | 899 | static int |
31568a15 TT |
900 | s390_region_ok_for_hw_watchpoint (struct target_ops *self, |
901 | CORE_ADDR addr, int cnt) | |
5769d3cd | 902 | { |
fd7979d1 | 903 | return 1; |
5769d3cd AC |
904 | } |
905 | ||
7803799a UW |
906 | static int |
907 | s390_target_wordsize (void) | |
908 | { | |
909 | int wordsize = 4; | |
910 | ||
911 | /* Check for 64-bit inferior process. This is the case when the host is | |
912 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
913 | #ifdef __s390x__ | |
914 | long pswm; | |
915 | ||
916 | errno = 0; | |
917 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
918 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
919 | wordsize = 8; | |
920 | #endif | |
921 | ||
922 | return wordsize; | |
923 | } | |
924 | ||
925 | static int | |
926 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
927 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
928 | { | |
929 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 930 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
931 | gdb_byte *ptr = *readptr; |
932 | ||
933 | if (endptr == ptr) | |
934 | return 0; | |
935 | ||
936 | if (endptr - ptr < sizeof_auxv_field * 2) | |
937 | return -1; | |
938 | ||
939 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
940 | ptr += sizeof_auxv_field; | |
941 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
942 | ptr += sizeof_auxv_field; | |
943 | ||
944 | *readptr = ptr; | |
945 | return 1; | |
946 | } | |
947 | ||
7803799a UW |
948 | static const struct target_desc * |
949 | s390_read_description (struct target_ops *ops) | |
950 | { | |
c642a434 UW |
951 | int tid = s390_inferior_tid (); |
952 | ||
953 | have_regset_last_break | |
954 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
955 | have_regset_system_call | |
956 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
957 | ||
7803799a UW |
958 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
959 | z/Architecture mode. If the target is running in 64-bit addressing | |
960 | mode, report s390x architecture. If the target is running in 31-bit | |
961 | addressing mode, but the kernel supports using 64-bit registers in | |
962 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
963 | #ifdef __s390x__ |
964 | { | |
965 | CORE_ADDR hwcap = 0; | |
966 | ||
967 | target_auxv_search (¤t_target, AT_HWCAP, &hwcap); | |
968 | have_regset_tdb = (hwcap & HWCAP_S390_TE) | |
969 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
970 | ||
971 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
972 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
973 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
974 | ||
975 | if (s390_target_wordsize () == 8) | |
976 | return (have_regset_vxrs ? | |
977 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
978 | tdesc_s390x_vx_linux64) : | |
979 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
980 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
981 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
982 | tdesc_s390x_linux64); | |
983 | ||
984 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
985 | return (have_regset_vxrs ? | |
986 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
987 | tdesc_s390_vx_linux64) : | |
988 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
989 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
990 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
991 | tdesc_s390_linux64); | |
992 | } | |
7803799a UW |
993 | #endif |
994 | ||
995 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
996 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
997 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
998 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
999 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1000 | tdesc_s390_linux32); | |
7803799a | 1001 | } |
fd7979d1 | 1002 | |
10d6c8cd DJ |
1003 | void _initialize_s390_nat (void); |
1004 | ||
1005 | void | |
1006 | _initialize_s390_nat (void) | |
1007 | { | |
1008 | struct target_ops *t; | |
1009 | ||
1010 | /* Fill in the generic GNU/Linux methods. */ | |
1011 | t = linux_target (); | |
1012 | ||
1013 | /* Add our register access methods. */ | |
1014 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
1015 | t->to_store_registers = s390_linux_store_inferior_registers; | |
1016 | ||
fd7979d1 UW |
1017 | /* Add our watchpoint methods. */ |
1018 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
8193adea AA |
1019 | t->to_insert_hw_breakpoint = s390_insert_hw_breakpoint; |
1020 | t->to_remove_hw_breakpoint = s390_remove_hw_breakpoint; | |
2a3cdf79 | 1021 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
1022 | t->to_have_continuable_watchpoint = 1; |
1023 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
1024 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
1025 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
1026 | ||
7803799a UW |
1027 | /* Detect target architecture. */ |
1028 | t->to_read_description = s390_read_description; | |
1029 | t->to_auxv_parse = s390_auxv_parse; | |
1030 | ||
10d6c8cd | 1031 | /* Register the target. */ |
f973ed9c | 1032 | linux_nat_add_target (t); |
18396193 AA |
1033 | linux_nat_set_new_thread (t, s390_new_thread); |
1034 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); | |
373c3dad AA |
1035 | linux_nat_set_forget_process (t, s390_forget_process); |
1036 | linux_nat_set_new_fork (t, s390_linux_new_fork); | |
169fe0df AA |
1037 | |
1038 | /* A maintenance command to enable showing the PER state. */ | |
1039 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1040 | &show_debug_regs, _("\ | |
1041 | Set whether to show the PER (debug) hardware state."), _("\ | |
1042 | Show whether to show the PER (debug) hardware state."), _("\ | |
1043 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1044 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1045 | and when the inferior triggers a breakpoint or watchpoint."), | |
1046 | NULL, | |
1047 | NULL, | |
1048 | &maintenance_set_cmdlist, | |
1049 | &maintenance_show_cmdlist); | |
10d6c8cd | 1050 | } |