Commit | Line | Data |
---|---|---|
5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
28e7fd62 | 2 | Copyright (C) 2001-2013 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" |
d0f54f9d | 29 | |
0e5fae36 | 30 | #include "s390-linux-tdep.h" |
c642a434 | 31 | #include "elf/common.h" |
d0f54f9d | 32 | |
5769d3cd AC |
33 | #include <asm/ptrace.h> |
34 | #include <sys/ptrace.h> | |
2d0c7962 | 35 | #include <asm/types.h> |
5769d3cd | 36 | #include <sys/procfs.h> |
5769d3cd | 37 | #include <sys/ucontext.h> |
7803799a UW |
38 | #include <elf.h> |
39 | ||
c642a434 UW |
40 | #ifndef PTRACE_GETREGSET |
41 | #define PTRACE_GETREGSET 0x4204 | |
42 | #endif | |
43 | ||
44 | #ifndef PTRACE_SETREGSET | |
45 | #define PTRACE_SETREGSET 0x4205 | |
46 | #endif | |
47 | ||
48 | static int have_regset_last_break = 0; | |
49 | static int have_regset_system_call = 0; | |
4ac33720 | 50 | static int have_regset_tdb = 0; |
5769d3cd | 51 | |
d0f54f9d JB |
52 | /* Map registers to gregset/ptrace offsets. |
53 | These arrays are defined in s390-tdep.c. */ | |
54 | ||
55 | #ifdef __s390x__ | |
56 | #define regmap_gregset s390x_regmap_gregset | |
5769d3cd | 57 | #else |
d0f54f9d | 58 | #define regmap_gregset s390_regmap_gregset |
5769d3cd | 59 | #endif |
d0f54f9d JB |
60 | |
61 | #define regmap_fpregset s390_regmap_fpregset | |
62 | ||
2ccd1468 UW |
63 | /* Fill the regset described by MAP into REGCACHE, using the values |
64 | from REGP. The MAP array represents each register as a pair | |
65 | (offset, regno) of short integers and is terminated with -1. */ | |
d6db1fab UW |
66 | |
67 | static void | |
2ccd1468 UW |
68 | s390_native_supply (struct regcache *regcache, const short *map, |
69 | const gdb_byte *regp) | |
d6db1fab | 70 | { |
2ccd1468 | 71 | for (; map[0] >= 0; map += 2) |
4ac33720 | 72 | regcache_raw_supply (regcache, map[1], regp ? regp + map[0] : NULL); |
2ccd1468 UW |
73 | } |
74 | ||
75 | /* Collect the register REGNO out of the regset described by MAP from | |
76 | REGCACHE into REGP. If REGNO == -1, do this for all registers in | |
77 | this regset. */ | |
78 | ||
79 | static void | |
80 | s390_native_collect (const struct regcache *regcache, const short *map, | |
81 | int regno, gdb_byte *regp) | |
82 | { | |
83 | for (; map[0] >= 0; map += 2) | |
84 | if (regno == -1 || regno == map[1]) | |
85 | regcache_raw_collect (regcache, map[1], regp + map[0]); | |
86 | } | |
87 | ||
88 | /* Fill GDB's register array with the general-purpose register values | |
89 | in *REGP. | |
90 | ||
91 | When debugging a 32-bit executable running under a 64-bit kernel, | |
92 | we have to fix up the 64-bit registers we get from the kernel to | |
93 | make them look like 32-bit registers. */ | |
d6db1fab | 94 | |
2ccd1468 UW |
95 | void |
96 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
97 | { | |
9cbd5950 | 98 | #ifdef __s390x__ |
d6db1fab | 99 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
2ccd1468 | 100 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
101 | { |
102 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
2ccd1468 UW |
103 | ULONGEST pswm = 0, pswa = 0; |
104 | gdb_byte buf[4]; | |
105 | const short *map; | |
d6db1fab | 106 | |
2ccd1468 | 107 | for (map = regmap_gregset; map[0] >= 0; map += 2) |
d6db1fab | 108 | { |
2ccd1468 UW |
109 | const gdb_byte *p = (const gdb_byte *) regp + map[0]; |
110 | int regno = map[1]; | |
111 | ||
112 | if (regno == S390_PSWM_REGNUM) | |
113 | pswm = extract_unsigned_integer (p, 8, byte_order); | |
114 | else if (regno == S390_PSWA_REGNUM) | |
115 | pswa = extract_unsigned_integer (p, 8, byte_order); | |
116 | else | |
117 | { | |
118 | if ((regno >= S390_R0_REGNUM && regno <= S390_R15_REGNUM) | |
119 | || regno == S390_ORIG_R2_REGNUM) | |
120 | p += 4; | |
121 | regcache_raw_supply (regcache, regno, p); | |
122 | } | |
d6db1fab UW |
123 | } |
124 | ||
2ccd1468 UW |
125 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
126 | regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf); | |
127 | store_unsigned_integer (buf, 4, byte_order, | |
128 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
129 | regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf); | |
130 | return; | |
d6db1fab UW |
131 | } |
132 | #endif | |
133 | ||
2ccd1468 | 134 | s390_native_supply (regcache, regmap_gregset, (const gdb_byte *) regp); |
d6db1fab UW |
135 | } |
136 | ||
2ccd1468 UW |
137 | /* Fill register REGNO (if it is a general-purpose register) in |
138 | *REGP with the value in GDB's register array. If REGNO is -1, | |
139 | do this for all registers. */ | |
d6db1fab | 140 | |
2ccd1468 UW |
141 | void |
142 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
143 | { | |
d6db1fab UW |
144 | #ifdef __s390x__ |
145 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
2ccd1468 | 146 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 147 | { |
2ccd1468 UW |
148 | gdb_byte *psw_p[2]; |
149 | const short *map; | |
d6db1fab | 150 | |
2ccd1468 | 151 | for (map = regmap_gregset; map[0] >= 0; map += 2) |
d6db1fab | 152 | { |
2ccd1468 UW |
153 | gdb_byte *p = (gdb_byte *) regp + map[0]; |
154 | int reg = map[1]; | |
155 | ||
156 | if (reg >= S390_PSWM_REGNUM && reg <= S390_PSWA_REGNUM) | |
157 | psw_p[reg - S390_PSWM_REGNUM] = p; | |
158 | ||
159 | else if (regno == -1 || regno == reg) | |
160 | { | |
161 | if ((reg >= S390_R0_REGNUM && reg <= S390_R15_REGNUM) | |
162 | || reg == S390_ORIG_R2_REGNUM) | |
163 | { | |
164 | memset (p, 0, 4); | |
165 | p += 4; | |
166 | } | |
167 | regcache_raw_collect (regcache, reg, p + 4); | |
168 | } | |
d6db1fab UW |
169 | } |
170 | ||
2ccd1468 UW |
171 | if (regno == -1 |
172 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 173 | { |
2ccd1468 UW |
174 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
175 | ULONGEST pswa, pswm; | |
d6db1fab UW |
176 | gdb_byte buf[4]; |
177 | ||
2ccd1468 UW |
178 | regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf); |
179 | pswm = extract_unsigned_integer (buf, 4, byte_order); | |
180 | regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf); | |
d6db1fab UW |
181 | pswa = extract_unsigned_integer (buf, 4, byte_order); |
182 | ||
2ccd1468 UW |
183 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
184 | store_unsigned_integer (psw_p[0], 8, byte_order, | |
185 | ((pswm & 0xfff7ffff) << 32) | | |
186 | (pswa & 0x80000000)); | |
187 | if (regno == -1 || regno == S390_PSWA_REGNUM) | |
188 | store_unsigned_integer (psw_p[1], 8, byte_order, | |
189 | pswa & 0x7fffffff); | |
d6db1fab | 190 | } |
2ccd1468 | 191 | return; |
d6db1fab | 192 | } |
9cbd5950 JB |
193 | #endif |
194 | ||
2ccd1468 | 195 | s390_native_collect (regcache, regmap_gregset, regno, (gdb_byte *) regp); |
d0f54f9d JB |
196 | } |
197 | ||
198 | /* Fill GDB's register array with the floating-point register values | |
199 | in *REGP. */ | |
200 | void | |
7f7fe91e | 201 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 202 | { |
2ccd1468 | 203 | s390_native_supply (regcache, regmap_fpregset, (const gdb_byte *) regp); |
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 | { |
2ccd1468 | 212 | s390_native_collect (regcache, regmap_fpregset, regno, (gdb_byte *) regp); |
d0f54f9d JB |
213 | } |
214 | ||
215 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
216 | static int | |
217 | s390_inferior_tid (void) | |
218 | { | |
219 | /* GNU/Linux LWP ID's are process ID's. */ | |
dfd4cc63 | 220 | int tid = ptid_get_lwp (inferior_ptid); |
d0f54f9d | 221 | if (tid == 0) |
dfd4cc63 | 222 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
d0f54f9d JB |
223 | |
224 | return tid; | |
225 | } | |
226 | ||
227 | /* Fetch all general-purpose registers from process/thread TID and | |
228 | store their values in GDB's register cache. */ | |
229 | static void | |
56be3814 | 230 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
231 | { |
232 | gregset_t regs; | |
233 | ptrace_area parea; | |
234 | ||
235 | parea.len = sizeof (regs); | |
236 | parea.process_addr = (addr_t) ®s; | |
237 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
238 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 239 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 240 | |
56be3814 | 241 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
242 | } |
243 | ||
244 | /* Store all valid general-purpose registers in GDB's register cache | |
245 | into the process/thread specified by TID. */ | |
246 | static void | |
56be3814 | 247 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
248 | { |
249 | gregset_t regs; | |
250 | ptrace_area parea; | |
251 | ||
252 | parea.len = sizeof (regs); | |
253 | parea.process_addr = (addr_t) ®s; | |
254 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
255 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 256 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 257 | |
56be3814 | 258 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d JB |
259 | |
260 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 261 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
262 | } |
263 | ||
264 | /* Fetch all floating-point registers from process/thread TID and store | |
265 | their values in GDB's register cache. */ | |
266 | static void | |
56be3814 | 267 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
268 | { |
269 | fpregset_t fpregs; | |
270 | ptrace_area parea; | |
271 | ||
272 | parea.len = sizeof (fpregs); | |
273 | parea.process_addr = (addr_t) &fpregs; | |
274 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
275 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 276 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 277 | |
56be3814 | 278 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
279 | } |
280 | ||
281 | /* Store all valid floating-point registers in GDB's register cache | |
282 | into the process/thread specified by TID. */ | |
283 | static void | |
56be3814 | 284 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
285 | { |
286 | fpregset_t fpregs; | |
287 | ptrace_area parea; | |
288 | ||
289 | parea.len = sizeof (fpregs); | |
290 | parea.process_addr = (addr_t) &fpregs; | |
291 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
292 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 293 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 294 | |
56be3814 | 295 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d JB |
296 | |
297 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0) | |
e2e0b3e5 | 298 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
299 | } |
300 | ||
c642a434 UW |
301 | /* Fetch all registers in the kernel's register set whose number is REGSET, |
302 | whose size is REGSIZE, and whose layout is described by REGMAP, from | |
303 | process/thread TID and store their values in GDB's register cache. */ | |
304 | static void | |
305 | fetch_regset (struct regcache *regcache, int tid, | |
2ccd1468 | 306 | int regset, int regsize, const short *regmap) |
c642a434 | 307 | { |
c642a434 UW |
308 | gdb_byte *buf = alloca (regsize); |
309 | struct iovec iov; | |
c642a434 UW |
310 | |
311 | iov.iov_base = buf; | |
312 | iov.iov_len = regsize; | |
313 | ||
314 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0) | |
4ac33720 UW |
315 | { |
316 | if (errno == ENODATA) | |
317 | s390_native_supply (regcache, regmap, NULL); | |
318 | else | |
319 | perror_with_name (_("Couldn't get register set")); | |
320 | } | |
321 | else | |
322 | s390_native_supply (regcache, regmap, buf); | |
c642a434 UW |
323 | } |
324 | ||
325 | /* Store all registers in the kernel's register set whose number is REGSET, | |
326 | whose size is REGSIZE, and whose layout is described by REGMAP, from | |
327 | GDB's register cache back to process/thread TID. */ | |
328 | static void | |
329 | store_regset (struct regcache *regcache, int tid, | |
2ccd1468 | 330 | int regset, int regsize, const short *regmap) |
c642a434 | 331 | { |
c642a434 UW |
332 | gdb_byte *buf = alloca (regsize); |
333 | struct iovec iov; | |
c642a434 UW |
334 | |
335 | iov.iov_base = buf; | |
336 | iov.iov_len = regsize; | |
337 | ||
338 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) < 0) | |
339 | perror_with_name (_("Couldn't get register set")); | |
340 | ||
2ccd1468 | 341 | s390_native_collect (regcache, regmap, -1, buf); |
c642a434 UW |
342 | |
343 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset, (long) &iov) < 0) | |
344 | perror_with_name (_("Couldn't set register set")); | |
345 | } | |
346 | ||
347 | /* Check whether the kernel provides a register set with number REGSET | |
348 | of size REGSIZE for process/thread TID. */ | |
349 | static int | |
350 | check_regset (int tid, int regset, int regsize) | |
351 | { | |
352 | gdb_byte *buf = alloca (regsize); | |
353 | struct iovec iov; | |
354 | ||
355 | iov.iov_base = buf; | |
356 | iov.iov_len = regsize; | |
357 | ||
4ac33720 UW |
358 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
359 | || errno == ENODATA) | |
c642a434 | 360 | return 1; |
4ac33720 | 361 | return 0; |
c642a434 UW |
362 | } |
363 | ||
d0f54f9d JB |
364 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
365 | this for all registers. */ | |
10d6c8cd | 366 | static void |
28439f5e PA |
367 | s390_linux_fetch_inferior_registers (struct target_ops *ops, |
368 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
369 | { |
370 | int tid = s390_inferior_tid (); | |
371 | ||
2ccd1468 | 372 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 373 | fetch_regs (regcache, tid); |
d0f54f9d | 374 | |
2ccd1468 | 375 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 376 | fetch_fpregs (regcache, tid); |
c642a434 UW |
377 | |
378 | if (have_regset_last_break) | |
379 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
380 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
381 | (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32 | |
382 | ? s390_regmap_last_break : s390x_regmap_last_break)); | |
383 | ||
384 | if (have_regset_system_call) | |
385 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
386 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
387 | s390_regmap_system_call); | |
4ac33720 UW |
388 | |
389 | if (have_regset_tdb) | |
390 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
391 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
392 | s390_regmap_tdb); | |
d0f54f9d JB |
393 | } |
394 | ||
395 | /* Store register REGNUM back into the child process. If REGNUM is | |
396 | -1, do this for all registers. */ | |
10d6c8cd | 397 | static void |
28439f5e PA |
398 | s390_linux_store_inferior_registers (struct target_ops *ops, |
399 | struct regcache *regcache, int regnum) | |
d0f54f9d JB |
400 | { |
401 | int tid = s390_inferior_tid (); | |
402 | ||
2ccd1468 | 403 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 404 | store_regs (regcache, tid, regnum); |
d0f54f9d | 405 | |
2ccd1468 | 406 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 407 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
408 | |
409 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
410 | ||
411 | if (have_regset_system_call) | |
412 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
413 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
414 | s390_regmap_system_call); | |
5769d3cd AC |
415 | } |
416 | ||
d0f54f9d | 417 | |
e1457d83 JB |
418 | /* Hardware-assisted watchpoint handling. */ |
419 | ||
420 | /* We maintain a list of all currently active watchpoints in order | |
421 | to properly handle watchpoint removal. | |
422 | ||
423 | The only thing we actually need is the total address space area | |
424 | spanned by the watchpoints. */ | |
425 | ||
5769d3cd AC |
426 | struct watch_area |
427 | { | |
e1457d83 | 428 | struct watch_area *next; |
5769d3cd AC |
429 | CORE_ADDR lo_addr; |
430 | CORE_ADDR hi_addr; | |
431 | }; | |
432 | ||
e1457d83 | 433 | static struct watch_area *watch_base = NULL; |
5769d3cd | 434 | |
fd7979d1 | 435 | static int |
e1457d83 | 436 | s390_stopped_by_watchpoint (void) |
5769d3cd AC |
437 | { |
438 | per_lowcore_bits per_lowcore; | |
439 | ptrace_area parea; | |
9f0bdab8 | 440 | int result; |
5769d3cd | 441 | |
e1457d83 JB |
442 | /* Speed up common case. */ |
443 | if (!watch_base) | |
444 | return 0; | |
445 | ||
5769d3cd AC |
446 | parea.len = sizeof (per_lowcore); |
447 | parea.process_addr = (addr_t) & per_lowcore; | |
448 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
e1457d83 | 449 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea) < 0) |
e2e0b3e5 | 450 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 451 | |
9f0bdab8 DJ |
452 | result = (per_lowcore.perc_storage_alteration == 1 |
453 | && per_lowcore.perc_store_real_address == 0); | |
454 | ||
455 | if (result) | |
456 | { | |
457 | /* Do not report this watchpoint again. */ | |
458 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
459 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea) < 0) | |
460 | perror_with_name (_("Couldn't clear watchpoint status")); | |
461 | } | |
462 | ||
463 | return result; | |
e1457d83 | 464 | } |
5769d3cd | 465 | |
e1457d83 | 466 | static void |
7b50312a | 467 | s390_fix_watch_points (struct lwp_info *lp) |
5769d3cd | 468 | { |
9f0bdab8 | 469 | int tid; |
e1457d83 | 470 | |
5769d3cd AC |
471 | per_struct per_info; |
472 | ptrace_area parea; | |
473 | ||
e1457d83 JB |
474 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
475 | struct watch_area *area; | |
476 | ||
dfd4cc63 | 477 | tid = ptid_get_lwp (lp->ptid); |
9f0bdab8 | 478 | if (tid == 0) |
dfd4cc63 | 479 | tid = ptid_get_pid (lp->ptid); |
9f0bdab8 | 480 | |
e1457d83 JB |
481 | for (area = watch_base; area; area = area->next) |
482 | { | |
483 | watch_lo_addr = min (watch_lo_addr, area->lo_addr); | |
484 | watch_hi_addr = max (watch_hi_addr, area->hi_addr); | |
485 | } | |
486 | ||
5769d3cd AC |
487 | parea.len = sizeof (per_info); |
488 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 JB |
489 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
490 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea) < 0) | |
e2e0b3e5 | 491 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
e1457d83 JB |
492 | |
493 | if (watch_base) | |
5769d3cd AC |
494 | { |
495 | per_info.control_regs.bits.em_storage_alteration = 1; | |
496 | per_info.control_regs.bits.storage_alt_space_ctl = 1; | |
497 | } | |
498 | else | |
499 | { | |
500 | per_info.control_regs.bits.em_storage_alteration = 0; | |
501 | per_info.control_regs.bits.storage_alt_space_ctl = 0; | |
502 | } | |
503 | per_info.starting_addr = watch_lo_addr; | |
504 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 JB |
505 | |
506 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea) < 0) | |
e2e0b3e5 | 507 | perror_with_name (_("Couldn't modify watchpoint status")); |
5769d3cd AC |
508 | } |
509 | ||
fd7979d1 | 510 | static int |
0cf6dd15 TJB |
511 | s390_insert_watchpoint (CORE_ADDR addr, int len, int type, |
512 | struct expression *cond) | |
5769d3cd | 513 | { |
9f0bdab8 | 514 | struct lwp_info *lp; |
e1457d83 | 515 | struct watch_area *area = xmalloc (sizeof (struct watch_area)); |
9f0bdab8 | 516 | |
e1457d83 | 517 | if (!area) |
34201ae3 | 518 | return -1; |
e1457d83 JB |
519 | |
520 | area->lo_addr = addr; | |
521 | area->hi_addr = addr + len - 1; | |
34201ae3 | 522 | |
e1457d83 JB |
523 | area->next = watch_base; |
524 | watch_base = area; | |
525 | ||
4c38200f | 526 | ALL_LWPS (lp) |
3e290cb1 | 527 | s390_fix_watch_points (lp); |
e1457d83 | 528 | return 0; |
5769d3cd AC |
529 | } |
530 | ||
fd7979d1 | 531 | static int |
0cf6dd15 TJB |
532 | s390_remove_watchpoint (CORE_ADDR addr, int len, int type, |
533 | struct expression *cond) | |
5769d3cd | 534 | { |
9f0bdab8 | 535 | struct lwp_info *lp; |
e1457d83 JB |
536 | struct watch_area *area, **parea; |
537 | ||
538 | for (parea = &watch_base; *parea; parea = &(*parea)->next) | |
539 | if ((*parea)->lo_addr == addr | |
540 | && (*parea)->hi_addr == addr + len - 1) | |
541 | break; | |
542 | ||
543 | if (!*parea) | |
5769d3cd AC |
544 | { |
545 | fprintf_unfiltered (gdb_stderr, | |
e1457d83 | 546 | "Attempt to remove nonexistent watchpoint.\n"); |
5769d3cd AC |
547 | return -1; |
548 | } | |
e1457d83 JB |
549 | |
550 | area = *parea; | |
551 | *parea = area->next; | |
552 | xfree (area); | |
553 | ||
4c38200f | 554 | ALL_LWPS (lp) |
3e290cb1 | 555 | s390_fix_watch_points (lp); |
e1457d83 | 556 | return 0; |
5769d3cd AC |
557 | } |
558 | ||
fd7979d1 UW |
559 | static int |
560 | s390_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
561 | { | |
b1798462 | 562 | return type == bp_hardware_watchpoint; |
fd7979d1 | 563 | } |
e1457d83 | 564 | |
fd7979d1 | 565 | static int |
2a3cdf79 | 566 | s390_region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt) |
5769d3cd | 567 | { |
fd7979d1 | 568 | return 1; |
5769d3cd AC |
569 | } |
570 | ||
7803799a UW |
571 | static int |
572 | s390_target_wordsize (void) | |
573 | { | |
574 | int wordsize = 4; | |
575 | ||
576 | /* Check for 64-bit inferior process. This is the case when the host is | |
577 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
578 | #ifdef __s390x__ | |
579 | long pswm; | |
580 | ||
581 | errno = 0; | |
582 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
583 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
584 | wordsize = 8; | |
585 | #endif | |
586 | ||
587 | return wordsize; | |
588 | } | |
589 | ||
590 | static int | |
591 | s390_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
592 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
593 | { | |
594 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 595 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
596 | gdb_byte *ptr = *readptr; |
597 | ||
598 | if (endptr == ptr) | |
599 | return 0; | |
600 | ||
601 | if (endptr - ptr < sizeof_auxv_field * 2) | |
602 | return -1; | |
603 | ||
604 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
605 | ptr += sizeof_auxv_field; | |
606 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
607 | ptr += sizeof_auxv_field; | |
608 | ||
609 | *readptr = ptr; | |
610 | return 1; | |
611 | } | |
612 | ||
613 | #ifdef __s390x__ | |
614 | static unsigned long | |
615 | s390_get_hwcap (void) | |
616 | { | |
617 | CORE_ADDR field; | |
618 | ||
619 | if (target_auxv_search (¤t_target, AT_HWCAP, &field)) | |
620 | return (unsigned long) field; | |
621 | ||
622 | return 0; | |
623 | } | |
624 | #endif | |
625 | ||
626 | static const struct target_desc * | |
627 | s390_read_description (struct target_ops *ops) | |
628 | { | |
c642a434 UW |
629 | int tid = s390_inferior_tid (); |
630 | ||
631 | have_regset_last_break | |
632 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
633 | have_regset_system_call | |
634 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
635 | ||
7803799a UW |
636 | #ifdef __s390x__ |
637 | /* If GDB itself is compiled as 64-bit, we are running on a machine in | |
638 | z/Architecture mode. If the target is running in 64-bit addressing | |
639 | mode, report s390x architecture. If the target is running in 31-bit | |
640 | addressing mode, but the kernel supports using 64-bit registers in | |
641 | that mode, report s390 architecture with 64-bit GPRs. */ | |
642 | ||
6682d959 AA |
643 | have_regset_tdb = (s390_get_hwcap () & HWCAP_S390_TE) ? |
644 | check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset) : 0; | |
645 | ||
7803799a | 646 | if (s390_target_wordsize () == 8) |
4ac33720 UW |
647 | return (have_regset_tdb ? tdesc_s390x_te_linux64 : |
648 | have_regset_system_call? tdesc_s390x_linux64v2 : | |
c642a434 UW |
649 | have_regset_last_break? tdesc_s390x_linux64v1 : |
650 | tdesc_s390x_linux64); | |
7803799a UW |
651 | |
652 | if (s390_get_hwcap () & HWCAP_S390_HIGH_GPRS) | |
4ac33720 UW |
653 | return (have_regset_tdb ? tdesc_s390_te_linux64 : |
654 | have_regset_system_call? tdesc_s390_linux64v2 : | |
c642a434 UW |
655 | have_regset_last_break? tdesc_s390_linux64v1 : |
656 | tdesc_s390_linux64); | |
7803799a UW |
657 | #endif |
658 | ||
659 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
660 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
661 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
662 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
663 | have_regset_last_break? tdesc_s390_linux32v1 : | |
664 | tdesc_s390_linux32); | |
7803799a | 665 | } |
fd7979d1 | 666 | |
10d6c8cd DJ |
667 | void _initialize_s390_nat (void); |
668 | ||
669 | void | |
670 | _initialize_s390_nat (void) | |
671 | { | |
672 | struct target_ops *t; | |
673 | ||
674 | /* Fill in the generic GNU/Linux methods. */ | |
675 | t = linux_target (); | |
676 | ||
677 | /* Add our register access methods. */ | |
678 | t->to_fetch_registers = s390_linux_fetch_inferior_registers; | |
679 | t->to_store_registers = s390_linux_store_inferior_registers; | |
680 | ||
fd7979d1 UW |
681 | /* Add our watchpoint methods. */ |
682 | t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint; | |
2a3cdf79 | 683 | t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint; |
fd7979d1 UW |
684 | t->to_have_continuable_watchpoint = 1; |
685 | t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint; | |
686 | t->to_insert_watchpoint = s390_insert_watchpoint; | |
687 | t->to_remove_watchpoint = s390_remove_watchpoint; | |
688 | ||
7803799a UW |
689 | /* Detect target architecture. */ |
690 | t->to_read_description = s390_read_description; | |
691 | t->to_auxv_parse = s390_auxv_parse; | |
692 | ||
10d6c8cd | 693 | /* Register the target. */ |
f973ed9c | 694 | linux_nat_add_target (t); |
9f0bdab8 | 695 | linux_nat_set_new_thread (t, s390_fix_watch_points); |
10d6c8cd | 696 | } |