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" |
d0f54f9d | 31 | |
0e5fae36 | 32 | #include "s390-linux-tdep.h" |
c642a434 | 33 | #include "elf/common.h" |
d0f54f9d | 34 | |
5769d3cd | 35 | #include <asm/ptrace.h> |
5826e159 | 36 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 37 | #include <asm/types.h> |
5769d3cd | 38 | #include <sys/procfs.h> |
5769d3cd | 39 | #include <sys/ucontext.h> |
7803799a UW |
40 | #include <elf.h> |
41 | ||
18396193 AA |
42 | /* Per-thread arch-specific data. */ |
43 | ||
44 | struct arch_lwp_info | |
45 | { | |
46 | /* Non-zero if the thread's PER info must be re-written. */ | |
47 | int per_info_changed; | |
48 | }; | |
49 | ||
c642a434 UW |
50 | static int have_regset_last_break = 0; |
51 | static int have_regset_system_call = 0; | |
4ac33720 | 52 | static int have_regset_tdb = 0; |
550bdf96 | 53 | static int have_regset_vxrs = 0; |
5769d3cd | 54 | |
99b7da5d AA |
55 | /* Register map for 32-bit executables running under a 64-bit |
56 | kernel. */ | |
d0f54f9d JB |
57 | |
58 | #ifdef __s390x__ | |
99b7da5d AA |
59 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
60 | { | |
61 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
62 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
63 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
64 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
65 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
66 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
67 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
68 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
69 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
70 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
71 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
72 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
73 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
74 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
75 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
76 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
77 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
78 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
79 | { 16, S390_A0_REGNUM, 4 }, | |
80 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
81 | { 0 } | |
82 | }; | |
83 | ||
84 | static const struct regset s390_64_gregset = | |
85 | { | |
86 | s390_64_regmap_gregset, | |
87 | regcache_supply_regset, | |
88 | regcache_collect_regset | |
89 | }; | |
90 | ||
91 | #define S390_PSWM_OFFSET 0 | |
92 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 93 | #endif |
d0f54f9d | 94 | |
2ccd1468 UW |
95 | /* Fill GDB's register array with the general-purpose register values |
96 | in *REGP. | |
97 | ||
98 | When debugging a 32-bit executable running under a 64-bit kernel, | |
99 | we have to fix up the 64-bit registers we get from the kernel to | |
100 | make them look like 32-bit registers. */ | |
d6db1fab | 101 | |
2ccd1468 UW |
102 | void |
103 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
104 | { | |
9cbd5950 | 105 | #ifdef __s390x__ |
d6db1fab | 106 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
2ccd1468 | 107 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
108 | { |
109 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 110 | ULONGEST pswm, pswa; |
2ccd1468 | 111 | gdb_byte buf[4]; |
d6db1fab | 112 | |
99b7da5d AA |
113 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
114 | regp, sizeof (gregset_t)); | |
115 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
116 | + S390_PSWM_OFFSET, 8, byte_order); | |
117 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
118 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 UW |
119 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
120 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
121 | store_unsigned_integer (buf, 4, byte_order, | |
122 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
123 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
124 | return; | |
d6db1fab UW |
125 | } |
126 | #endif | |
127 | ||
99b7da5d AA |
128 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
129 | sizeof (gregset_t)); | |
d6db1fab UW |
130 | } |
131 | ||
2ccd1468 UW |
132 | /* Fill register REGNO (if it is a general-purpose register) in |
133 | *REGP with the value in GDB's register array. If REGNO is -1, | |
134 | do this for all registers. */ | |
d6db1fab | 135 | |
2ccd1468 UW |
136 | void |
137 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
138 | { | |
d6db1fab UW |
139 | #ifdef __s390x__ |
140 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2ccd1468 | 141 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 142 | { |
99b7da5d AA |
143 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
144 | regp, sizeof (gregset_t)); | |
d6db1fab | 145 | |
2ccd1468 UW |
146 | if (regno == -1 |
147 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 148 | { |
2ccd1468 UW |
149 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
150 | ULONGEST pswa, pswm; | |
d6db1fab | 151 | gdb_byte buf[4]; |
2492f0d0 AA |
152 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
153 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 154 | |
2492f0d0 | 155 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 156 | |
2ccd1468 | 157 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
158 | { |
159 | pswm &= 0x80000000; | |
160 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); | |
161 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) | |
162 | & 0xfff7ffff) << 32; | |
163 | } | |
164 | ||
2ccd1468 | 165 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 AA |
166 | { |
167 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
168 | pswa = extract_unsigned_integer (buf, 4, byte_order); | |
169 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
170 | pswa &= 0x7fffffff; | |
171 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
172 | } | |
173 | ||
174 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 175 | } |
2ccd1468 | 176 | return; |
d6db1fab | 177 | } |
9cbd5950 JB |
178 | #endif |
179 | ||
99b7da5d AA |
180 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
181 | sizeof (gregset_t)); | |
d0f54f9d JB |
182 | } |
183 | ||
184 | /* Fill GDB's register array with the floating-point register values | |
185 | in *REGP. */ | |
186 | void | |
7f7fe91e | 187 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 188 | { |
99b7da5d AA |
189 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
190 | sizeof (fpregset_t)); | |
d0f54f9d JB |
191 | } |
192 | ||
193 | /* Fill register REGNO (if it is a general-purpose register) in | |
194 | *REGP with the value in GDB's register array. If REGNO is -1, | |
195 | do this for all registers. */ | |
196 | void | |
7f7fe91e | 197 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 198 | { |
99b7da5d AA |
199 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
200 | sizeof (fpregset_t)); | |
d0f54f9d JB |
201 | } |
202 | ||
203 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
204 | static int | |
205 | s390_inferior_tid (void) | |
206 | { | |
207 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 208 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 209 | if (tid == 0) |
dfd4cc63 | 210 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
211 | |
212 | return tid; | |
213 | } | |
214 | ||
215 | /* Fetch all general-purpose registers from process/thread TID and | |
216 | store their values in GDB's register cache. */ | |
217 | static void | |
56be3814 | 218 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
219 | { |
220 | gregset_t regs; | |
221 | ptrace_area parea; | |
222 | ||
223 | parea.len = sizeof (regs); | |
224 | parea.process_addr = (addr_t) ®s; | |
225 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 226 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 227 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 228 | |
56be3814 | 229 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
230 | } |
231 | ||
232 | /* Store all valid general-purpose registers in GDB's register cache | |
233 | into the process/thread specified by TID. */ | |
234 | static void | |
56be3814 | 235 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
236 | { |
237 | gregset_t regs; | |
238 | ptrace_area parea; | |
239 | ||
240 | parea.len = sizeof (regs); | |
241 | parea.process_addr = (addr_t) ®s; | |
242 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 243 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 244 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 245 | |
56be3814 | 246 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 247 | |
2b4cab86 | 248 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 249 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
250 | } |
251 | ||
252 | /* Fetch all floating-point registers from process/thread TID and store | |
253 | their values in GDB's register cache. */ | |
254 | static void | |
56be3814 | 255 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
256 | { |
257 | fpregset_t fpregs; | |
258 | ptrace_area parea; | |
259 | ||
260 | parea.len = sizeof (fpregs); | |
261 | parea.process_addr = (addr_t) &fpregs; | |
262 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 263 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 264 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 265 | |
56be3814 | 266 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
267 | } |
268 | ||
269 | /* Store all valid floating-point registers in GDB's register cache | |
270 | into the process/thread specified by TID. */ | |
271 | static void | |
56be3814 | 272 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
273 | { |
274 | fpregset_t fpregs; | |
275 | ptrace_area parea; | |
276 | ||
277 | parea.len = sizeof (fpregs); | |
278 | parea.process_addr = (addr_t) &fpregs; | |
279 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 280 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 281 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 282 | |
56be3814 | 283 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 284 | |
2b4cab86 | 285 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 286 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
287 | } |
288 | ||
99b7da5d AA |
289 | /* Fetch all registers in the kernel's register set whose number is |
290 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
291 | REGSET, from process/thread TID and store their values in GDB's | |
292 | register cache. */ | |
c642a434 UW |
293 | static void |
294 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 295 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 296 | { |
c642a434 UW |
297 | gdb_byte *buf = alloca (regsize); |
298 | struct iovec iov; | |
c642a434 UW |
299 | |
300 | iov.iov_base = buf; | |
301 | iov.iov_len = regsize; | |
302 | ||
99b7da5d | 303 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
304 | { |
305 | if (errno == ENODATA) | |
99b7da5d | 306 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
307 | else |
308 | perror_with_name (_("Couldn't get register set")); | |
309 | } | |
310 | else | |
99b7da5d | 311 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
312 | } |
313 | ||
99b7da5d AA |
314 | /* Store all registers in the kernel's register set whose number is |
315 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
316 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
317 | static void |
318 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 319 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 320 | { |
c642a434 UW |
321 | gdb_byte *buf = alloca (regsize); |
322 | struct iovec iov; | |
c642a434 UW |
323 | |
324 | iov.iov_base = buf; | |
325 | iov.iov_len = regsize; | |
326 | ||
99b7da5d | 327 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
328 | perror_with_name (_("Couldn't get register set")); |
329 | ||
99b7da5d | 330 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 331 | |
99b7da5d | 332 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
333 | perror_with_name (_("Couldn't set register set")); |
334 | } | |
335 | ||
336 | /* Check whether the kernel provides a register set with number REGSET | |
337 | of size REGSIZE for process/thread TID. */ | |
338 | static int | |
339 | check_regset (int tid, int regset, int regsize) | |
340 | { | |
341 | gdb_byte *buf = alloca (regsize); | |
342 | struct iovec iov; | |
343 | ||
344 | iov.iov_base = buf; | |
345 | iov.iov_len = regsize; | |
346 | ||
4ac33720 UW |
347 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
348 | || errno == ENODATA) | |
c642a434 | 349 | return 1; |
4ac33720 | 350 | return 0; |
c642a434 UW |
351 | } |
352 | ||
d0f54f9d JB |
353 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
354 | this for all registers. */ | |
10d6c8cd | 355 | static void |
28439f5e PA |
356 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
357 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
358 | { |
359 | int tid = s390_inferior_tid (); | |
360 | ||
2ccd1468 | 361 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 362 | fetch_regs (regcache, tid); |
d0f54f9d | 363 | |
2ccd1468 | 364 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 365 | fetch_fpregs (regcache, tid); |
c642a434 UW |
366 | |
367 | if (have_regset_last_break) | |
368 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
369 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
370 | (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32 | |
99b7da5d | 371 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
372 | |
373 | if (have_regset_system_call) | |
374 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
375 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 376 | &s390_system_call_regset); |
4ac33720 UW |
377 | |
378 | if (have_regset_tdb) | |
379 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
380 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 381 | &s390_tdb_regset); |
550bdf96 AA |
382 | |
383 | if (have_regset_vxrs) | |
384 | { | |
385 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
386 | && regnum <= S390_V15_LOWER_REGNUM)) | |
387 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
388 | &s390_vxrs_low_regset); | |
389 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
390 | && regnum <= S390_V31_REGNUM)) | |
391 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
392 | &s390_vxrs_high_regset); | |
393 | } | |
d0f54f9d JB |
394 | } |
395 | ||
396 | /* Store register REGNUM back into the child process. If REGNUM is | |
397 | -1, do this for all registers. */ | |
10d6c8cd | 398 | static void |
28439f5e PA |
399 | s390_linux_store_inferior_registers (struct target_ops *ops, |
400 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
401 | { |
402 | int tid = s390_inferior_tid (); | |
403 | ||
2ccd1468 | 404 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 405 | store_regs (regcache, tid, regnum); |
d0f54f9d | 406 | |
2ccd1468 | 407 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 408 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
409 | |
410 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
411 | ||
412 | if (have_regset_system_call) | |
413 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
414 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 415 | &s390_system_call_regset); |
550bdf96 AA |
416 | |
417 | if (have_regset_vxrs) | |
418 | { | |
419 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
420 | && regnum <= S390_V15_LOWER_REGNUM)) | |
421 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
422 | &s390_vxrs_low_regset); | |
423 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
424 | && regnum <= S390_V31_REGNUM)) | |
425 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
426 | &s390_vxrs_high_regset); | |
427 | } | |
5769d3cd AC |
428 | } |
429 | ||
d0f54f9d | 430 | |
e1457d83 JB |
431 | /* Hardware-assisted watchpoint handling. */ |
432 | ||
433 | /* We maintain a list of all currently active watchpoints in order | |
434 | to properly handle watchpoint removal. | |
435 | ||
436 | The only thing we actually need is the total address space area | |
437 | spanned by the watchpoints. */ | |
438 | ||
5769d3cd AC |
439 | struct watch_area |
440 | { | |
e1457d83 | 441 | struct watch_area *next; |
5769d3cd AC |
442 | CORE_ADDR lo_addr; |
443 | CORE_ADDR hi_addr; | |
444 | }; | |
445 | ||
e1457d83 | 446 | static struct watch_area *watch_base = NULL; |
5769d3cd | 447 | |
fd7979d1 | 448 | static int |
6a109b6b | 449 | s390_stopped_by_watchpoint (struct target_ops *ops) |
5769d3cd AC |
450 | { |
451 | per_lowcore_bits per_lowcore; | |
452 | ptrace_area parea; | |
9f0bdab8 | 453 | int result; |
5769d3cd | 454 | |
e1457d83 JB |
455 | /* Speed up common case. */ |
456 | if (!watch_base) | |
457 | return 0; | |
458 | ||
5769d3cd AC |
459 | parea.len = sizeof (per_lowcore); |
460 | parea.process_addr = (addr_t) & per_lowcore; | |
461 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 462 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 463 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 464 | |
9f0bdab8 DJ |
465 | result = (per_lowcore.perc_storage_alteration == 1 |
466 | && per_lowcore.perc_store_real_address == 0); | |
467 | ||
468 | if (result) | |
469 | { | |
470 | /* Do not report this watchpoint again. */ | |
471 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 472 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
473 | perror_with_name (_("Couldn't clear watchpoint status")); |
474 | } | |
475 | ||
476 | return result; | |
e1457d83 | 477 | } |
5769d3cd | 478 | |
18396193 AA |
479 | /* Each time before resuming a thread, update its PER info. */ |
480 | ||
e1457d83 | 481 | static void |
18396193 | 482 | s390_prepare_to_resume (struct lwp_info *lp) |
5769d3cd | 483 | { |
9f0bdab8 | 484 | int tid; |
e1457d83 | 485 | |
5769d3cd AC |
486 | per_struct per_info; |
487 | ptrace_area parea; | |
488 | ||
e1457d83 JB |
489 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
490 | struct watch_area *area; | |
491 | ||
18396193 AA |
492 | if (lp->arch_private == NULL |
493 | || !lp->arch_private->per_info_changed) | |
494 | return; | |
495 | ||
496 | lp->arch_private->per_info_changed = 0; | |
497 | ||
dfd4cc63 | 498 | tid = ptid_get_lwp (lp->ptid); |
9f0bdab8 | 499 | if (tid == 0) |
dfd4cc63 | 500 | tid = ptid_get_pid (lp->ptid); |
9f0bdab8 | 501 | |
e1457d83 JB |
502 | for (area = watch_base; area; area = area->next) |
503 | { | |
504 | watch_lo_addr = min (watch_lo_addr, area->lo_addr); | |
505 | watch_hi_addr = max (watch_hi_addr, area->hi_addr); | |
506 | } | |
507 | ||
5769d3cd AC |
508 | parea.len = sizeof (per_info); |
509 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 510 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
2b4cab86 | 511 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 512 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
e1457d83 JB |
513 | |
514 | if (watch_base) | |
5769d3cd AC |
515 | { |
516 | per_info.control_regs.bits.em_storage_alteration = 1; | |
517 | per_info.control_regs.bits.storage_alt_space_ctl = 1; | |
518 | } | |
519 | else | |
520 | { | |
521 | per_info.control_regs.bits.em_storage_alteration = 0; | |
522 | per_info.control_regs.bits.storage_alt_space_ctl = 0; | |
523 | } | |
524 | per_info.starting_addr = watch_lo_addr; | |
525 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 526 | |
2b4cab86 | 527 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 528 | perror_with_name (_("Couldn't modify watchpoint status")); |
5769d3cd AC |
529 | } |
530 | ||
18396193 AA |
531 | /* Make sure that LP is stopped and mark its PER info as changed, so |
532 | the next resume will update it. */ | |
533 | ||
534 | static void | |
535 | s390_refresh_per_info (struct lwp_info *lp) | |
536 | { | |
537 | if (lp->arch_private == NULL) | |
538 | lp->arch_private = XCNEW (struct arch_lwp_info); | |
539 | ||
540 | lp->arch_private->per_info_changed = 1; | |
541 | ||
542 | if (!lp->stopped) | |
543 | linux_stop_lwp (lp); | |
544 | } | |
545 | ||
546 | /* When attaching to a new thread, mark its PER info as changed. */ | |
547 | ||
548 | static void | |
549 | s390_new_thread (struct lwp_info *lp) | |
550 | { | |
551 | lp->arch_private = XCNEW (struct arch_lwp_info); | |
552 | lp->arch_private->per_info_changed = 1; | |
553 | } | |
554 | ||
fd7979d1 | 555 | static int |
7bb99c53 | 556 | s390_insert_watchpoint (struct target_ops *self, |
f486487f | 557 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 558 | struct expression *cond) |
5769d3cd | 559 | { |
9f0bdab8 | 560 | struct lwp_info *lp; |
8d749320 | 561 | struct watch_area *area = XNEW (struct watch_area); |
9f0bdab8 | 562 | |
e1457d83 | 563 | if (!area) |
34201ae3 | 564 | return -1; |
e1457d83 JB |
565 | |
566 | area->lo_addr = addr; | |
567 | area->hi_addr = addr + len - 1; | |
34201ae3 | 568 | |
e1457d83 JB |
569 | area->next = watch_base; |
570 | watch_base = area; | |
571 | ||
4c38200f | 572 | ALL_LWPS (lp) |
18396193 | 573 | s390_refresh_per_info (lp); |
e1457d83 | 574 | return 0; |
5769d3cd AC |
575 | } |
576 | ||
fd7979d1 | 577 | static int |
11b5219a | 578 | s390_remove_watchpoint (struct target_ops *self, |
f486487f | 579 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
0cf6dd15 | 580 | struct expression *cond) |
5769d3cd | 581 | { |
9f0bdab8 | 582 | struct lwp_info *lp; |
e1457d83 JB |
583 | struct watch_area *area, **parea; |
584 | ||
585 | for (parea = &watch_base; *parea; parea = &(*parea)->next) | |
586 | if ((*parea)->lo_addr == addr | |
587 | && (*parea)->hi_addr == addr + len - 1) | |
588 | break; | |
589 | ||
590 | if (!*parea) | |
5769d3cd AC |
591 | { |
592 | fprintf_unfiltered (gdb_stderr, | |
e1457d83 | 593 | "Attempt to remove nonexistent watchpoint.\n"); |
5769d3cd AC |
594 | return -1; |
595 | } | |
e1457d83 JB |
596 | |
597 | area = *parea; | |
598 | *parea = area->next; | |
599 | xfree (area); | |
600 | ||
4c38200f | 601 | ALL_LWPS (lp) |
18396193 | 602 | s390_refresh_per_info (lp); |
e1457d83 | 603 | return 0; |
5769d3cd AC |
604 | } |
605 | ||
fd7979d1 | 606 | static int |
5461485a | 607 | s390_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 608 | enum bptype type, int cnt, int othertype) |
fd7979d1 | 609 | { |
b1798462 | 610 | return type == bp_hardware_watchpoint; |
fd7979d1 | 611 | } |
e1457d83 | 612 | |
fd7979d1 | 613 | static int |
31568a15 TT |
614 | s390_region_ok_for_hw_watchpoint (struct target_ops *self, |
615 | CORE_ADDR addr, int cnt) | |
5769d3cd | 616 | { |
fd7979d1 | 617 | return 1; |
5769d3cd AC |
618 | } |
619 | ||
7803799a UW |
620 | static int |
621 | s390_target_wordsize (void) | |
622 | { | |
623 | int wordsize = 4; | |
624 | ||
625 | /* Check for 64-bit inferior process. This is the case when the host is | |
626 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
627 | #ifdef __s390x__ | |
628 | long pswm; | |
629 | ||
630 | errno = 0; | |
631 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
632 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
633 | wordsize = 8; | |
634 | #endif | |
635 | ||
636 | return wordsize; | |
637 | } | |
638 | ||
639 | static int | |
640 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
641 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
642 | { | |
643 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 644 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
645 | gdb_byte *ptr = *readptr; |
646 | ||
647 | if (endptr == ptr) | |
648 | return 0; | |
649 | ||
650 | if (endptr - ptr < sizeof_auxv_field * 2) | |
651 | return -1; | |
652 | ||
653 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
654 | ptr += sizeof_auxv_field; | |
655 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
656 | ptr += sizeof_auxv_field; | |
657 | ||
658 | *readptr = ptr; | |
659 | return 1; | |
660 | } | |
661 | ||
7803799a UW |
662 | static const struct target_desc * |
663 | s390_read_description (struct target_ops *ops) | |
664 | { | |
c642a434 UW |
665 | int tid = s390_inferior_tid (); |
666 | ||
667 | have_regset_last_break | |
668 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
669 | have_regset_system_call | |
670 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
671 | ||
7803799a UW |
672 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
673 | z/Architecture mode. If the target is running in 64-bit addressing | |
674 | mode, report s390x architecture. If the target is running in 31-bit | |
675 | addressing mode, but the kernel supports using 64-bit registers in | |
676 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
677 | #ifdef __s390x__ |
678 | { | |
679 | CORE_ADDR hwcap = 0; | |
680 | ||
681 | target_auxv_search (¤t_target, AT_HWCAP, &hwcap); | |
682 | have_regset_tdb = (hwcap & HWCAP_S390_TE) | |
683 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
684 | ||
685 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
686 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
687 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
688 | ||
689 | if (s390_target_wordsize () == 8) | |
690 | return (have_regset_vxrs ? | |
691 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : | |
692 | tdesc_s390x_vx_linux64) : | |
693 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
694 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
695 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
696 | tdesc_s390x_linux64); | |
697 | ||
698 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
699 | return (have_regset_vxrs ? | |
700 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : | |
701 | tdesc_s390_vx_linux64) : | |
702 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
703 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
704 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
705 | tdesc_s390_linux64); | |
706 | } | |
7803799a UW |
707 | #endif |
708 | ||
709 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
710 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
711 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
712 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
713 | have_regset_last_break? tdesc_s390_linux32v1 : | |
714 | tdesc_s390_linux32); | |
7803799a | 715 | } |
fd7979d1 | 716 | |
10d6c8cd DJ |
717 | void _initialize_s390_nat (void); |
718 | ||
719 | void | |
720 | _initialize_s390_nat (void) | |
721 | { | |
722 | struct target_ops *t; | |
723 | ||
724 | /* Fill in the generic GNU/Linux methods. */ | |
725 | t = linux_target (); | |
726 | ||
727 | /* Add our register access methods. */ | |
728 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
729 | t->to_store_registers = s390_linux_store_inferior_registers; | |
730 | ||
fd7979d1 UW |
731 | /* Add our watchpoint methods. */ |
732 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
2a3cdf79 | 733 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
734 | t->to_have_continuable_watchpoint = 1; |
735 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
736 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
737 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
738 | ||
7803799a UW |
739 | /* Detect target architecture. */ |
740 | t->to_read_description = s390_read_description; | |
741 | t->to_auxv_parse = s390_auxv_parse; | |
742 | ||
10d6c8cd | 743 | /* Register the target. */ |
f973ed9c | 744 | linux_nat_add_target (t); |
18396193 AA |
745 | linux_nat_set_new_thread (t, s390_new_thread); |
746 | linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume); | |
10d6c8cd | 747 | } |