Commit | Line | Data |
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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
42a4f53d | 2 | Copyright (C) 2001-2019 Free Software Foundation, Inc. |
d0f54f9d | 3 | |
5769d3cd AC |
4 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
5 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. | |
d0f54f9d | 6 | |
5769d3cd AC |
7 | This file is part of GDB. |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
5769d3cd AC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
5769d3cd AC |
21 | |
22 | #include "defs.h" | |
3ecc0ae2 | 23 | #include "regcache.h" |
d0f54f9d | 24 | #include "inferior.h" |
10d6c8cd DJ |
25 | #include "target.h" |
26 | #include "linux-nat.h" | |
7803799a | 27 | #include "auxv.h" |
5538f557 | 28 | #include "gregset.h" |
99b7da5d | 29 | #include "regset.h" |
ca9b78ce | 30 | #include "nat/linux-ptrace.h" |
169fe0df | 31 | #include "gdbcmd.h" |
d0f54f9d | 32 | |
d6e58945 | 33 | #include "s390-tdep.h" |
0e5fae36 | 34 | #include "s390-linux-tdep.h" |
c642a434 | 35 | #include "elf/common.h" |
d0f54f9d | 36 | |
5769d3cd | 37 | #include <asm/ptrace.h> |
5826e159 | 38 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 39 | #include <asm/types.h> |
5769d3cd | 40 | #include <sys/procfs.h> |
5769d3cd | 41 | #include <sys/ucontext.h> |
7803799a | 42 | #include <elf.h> |
93689493 | 43 | #include <algorithm> |
bcc0c096 | 44 | #include "inf-ptrace.h" |
7803799a | 45 | |
18396193 AA |
46 | /* Per-thread arch-specific data. */ |
47 | ||
48 | struct arch_lwp_info | |
49 | { | |
50 | /* Non-zero if the thread's PER info must be re-written. */ | |
51 | int per_info_changed; | |
52 | }; | |
53 | ||
c642a434 UW |
54 | static int have_regset_last_break = 0; |
55 | static int have_regset_system_call = 0; | |
4ac33720 | 56 | static int have_regset_tdb = 0; |
550bdf96 | 57 | static int have_regset_vxrs = 0; |
1b63490c | 58 | static int have_regset_gs = 0; |
5769d3cd | 59 | |
99b7da5d AA |
60 | /* Register map for 32-bit executables running under a 64-bit |
61 | kernel. */ | |
d0f54f9d JB |
62 | |
63 | #ifdef __s390x__ | |
99b7da5d AA |
64 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
65 | { | |
66 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
67 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
68 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
69 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
70 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
71 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
72 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
73 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
74 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
75 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
76 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
77 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
78 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
79 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
80 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
81 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
82 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
83 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
84 | { 16, S390_A0_REGNUM, 4 }, | |
85 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
86 | { 0 } | |
87 | }; | |
88 | ||
89 | static const struct regset s390_64_gregset = | |
90 | { | |
91 | s390_64_regmap_gregset, | |
92 | regcache_supply_regset, | |
93 | regcache_collect_regset | |
94 | }; | |
95 | ||
96 | #define S390_PSWM_OFFSET 0 | |
97 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 98 | #endif |
d0f54f9d | 99 | |
8193adea AA |
100 | /* PER-event mask bits and PER control bits (CR9). */ |
101 | ||
102 | #define PER_BIT(n) (1UL << (63 - (n))) | |
103 | #define PER_EVENT_BRANCH PER_BIT (32) | |
104 | #define PER_EVENT_IFETCH PER_BIT (33) | |
105 | #define PER_EVENT_STORE PER_BIT (34) | |
106 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
107 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
108 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
109 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
110 | ||
f6ac5f3d PA |
111 | class s390_linux_nat_target final : public linux_nat_target |
112 | { | |
113 | public: | |
114 | /* Add our register access methods. */ | |
115 | void fetch_registers (struct regcache *, int) override; | |
116 | void store_registers (struct regcache *, int) override; | |
117 | ||
118 | /* Add our watchpoint methods. */ | |
119 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
120 | int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
121 | override; | |
122 | int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
123 | override; | |
124 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
57810aa7 | 125 | bool stopped_by_watchpoint () override; |
f6ac5f3d PA |
126 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, |
127 | struct expression *) override; | |
128 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
129 | struct expression *) override; | |
130 | ||
131 | /* Detect target architecture. */ | |
132 | const struct target_desc *read_description () override; | |
133 | int auxv_parse (gdb_byte **readptr, | |
134 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
135 | override; | |
135340af PA |
136 | |
137 | /* Override linux_nat_target low methods. */ | |
138 | void low_new_thread (struct lwp_info *lp) override; | |
139 | void low_delete_thread (struct arch_lwp_info *lp) override; | |
140 | void low_prepare_to_resume (struct lwp_info *lp) override; | |
141 | void low_new_fork (struct lwp_info *parent, pid_t child_pid) override; | |
142 | void low_forget_process (pid_t pid) override; | |
f6ac5f3d PA |
143 | }; |
144 | ||
145 | static s390_linux_nat_target the_s390_linux_nat_target; | |
8193adea | 146 | |
2ccd1468 UW |
147 | /* Fill GDB's register array with the general-purpose register values |
148 | in *REGP. | |
149 | ||
150 | When debugging a 32-bit executable running under a 64-bit kernel, | |
151 | we have to fix up the 64-bit registers we get from the kernel to | |
152 | make them look like 32-bit registers. */ | |
d6db1fab | 153 | |
2ccd1468 UW |
154 | void |
155 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
156 | { | |
9cbd5950 | 157 | #ifdef __s390x__ |
ac7936df | 158 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 159 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
160 | { |
161 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 162 | ULONGEST pswm, pswa; |
2ccd1468 | 163 | gdb_byte buf[4]; |
d6db1fab | 164 | |
99b7da5d AA |
165 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
166 | regp, sizeof (gregset_t)); | |
167 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
168 | + S390_PSWM_OFFSET, 8, byte_order); | |
169 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
170 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 | 171 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
73e1c03f | 172 | regcache->raw_supply (S390_PSWM_REGNUM, buf); |
2ccd1468 UW |
173 | store_unsigned_integer (buf, 4, byte_order, |
174 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
73e1c03f | 175 | regcache->raw_supply (S390_PSWA_REGNUM, buf); |
2ccd1468 | 176 | return; |
d6db1fab UW |
177 | } |
178 | #endif | |
179 | ||
99b7da5d AA |
180 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
181 | sizeof (gregset_t)); | |
d6db1fab UW |
182 | } |
183 | ||
2ccd1468 UW |
184 | /* Fill register REGNO (if it is a general-purpose register) in |
185 | *REGP with the value in GDB's register array. If REGNO is -1, | |
186 | do this for all registers. */ | |
d6db1fab | 187 | |
2ccd1468 UW |
188 | void |
189 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
190 | { | |
d6db1fab | 191 | #ifdef __s390x__ |
ac7936df | 192 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 193 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 194 | { |
99b7da5d AA |
195 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
196 | regp, sizeof (gregset_t)); | |
d6db1fab | 197 | |
2ccd1468 UW |
198 | if (regno == -1 |
199 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 200 | { |
2ccd1468 UW |
201 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
202 | ULONGEST pswa, pswm; | |
d6db1fab | 203 | gdb_byte buf[4]; |
2492f0d0 AA |
204 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
205 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 206 | |
2492f0d0 | 207 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 208 | |
2ccd1468 | 209 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
210 | { |
211 | pswm &= 0x80000000; | |
34a79281 | 212 | regcache->raw_collect (S390_PSWM_REGNUM, buf); |
2492f0d0 AA |
213 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) |
214 | & 0xfff7ffff) << 32; | |
215 | } | |
216 | ||
2ccd1468 | 217 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 | 218 | { |
34a79281 | 219 | regcache->raw_collect (S390_PSWA_REGNUM, buf); |
2492f0d0 AA |
220 | pswa = extract_unsigned_integer (buf, 4, byte_order); |
221 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
222 | pswa &= 0x7fffffff; | |
223 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
224 | } | |
225 | ||
226 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 227 | } |
2ccd1468 | 228 | return; |
d6db1fab | 229 | } |
9cbd5950 JB |
230 | #endif |
231 | ||
99b7da5d AA |
232 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
233 | sizeof (gregset_t)); | |
d0f54f9d JB |
234 | } |
235 | ||
236 | /* Fill GDB's register array with the floating-point register values | |
237 | in *REGP. */ | |
238 | void | |
7f7fe91e | 239 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 240 | { |
99b7da5d AA |
241 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
242 | sizeof (fpregset_t)); | |
d0f54f9d JB |
243 | } |
244 | ||
245 | /* Fill register REGNO (if it is a general-purpose register) in | |
246 | *REGP with the value in GDB's register array. If REGNO is -1, | |
247 | do this for all registers. */ | |
248 | void | |
7f7fe91e | 249 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 250 | { |
99b7da5d AA |
251 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
252 | sizeof (fpregset_t)); | |
d0f54f9d JB |
253 | } |
254 | ||
255 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
256 | static int | |
257 | s390_inferior_tid (void) | |
258 | { | |
259 | /* GNU/Linux LWP ID's are process ID's. */ | |
e38504b3 | 260 | int tid = inferior_ptid.lwp (); |
d0f54f9d | 261 | if (tid == 0) |
e99b03dc | 262 | tid = inferior_ptid.pid (); /* Not a threaded program. */ |
d0f54f9d JB |
263 | |
264 | return tid; | |
265 | } | |
266 | ||
267 | /* Fetch all general-purpose registers from process/thread TID and | |
268 | store their values in GDB's register cache. */ | |
269 | static void | |
56be3814 | 270 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
271 | { |
272 | gregset_t regs; | |
273 | ptrace_area parea; | |
274 | ||
275 | parea.len = sizeof (regs); | |
276 | parea.process_addr = (addr_t) ®s; | |
277 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 278 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 279 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 280 | |
56be3814 | 281 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
282 | } |
283 | ||
284 | /* Store all valid general-purpose registers in GDB's register cache | |
285 | into the process/thread specified by TID. */ | |
286 | static void | |
56be3814 | 287 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
288 | { |
289 | gregset_t regs; | |
290 | ptrace_area parea; | |
291 | ||
292 | parea.len = sizeof (regs); | |
293 | parea.process_addr = (addr_t) ®s; | |
294 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 295 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 296 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 297 | |
56be3814 | 298 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 299 | |
2b4cab86 | 300 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 301 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
302 | } |
303 | ||
304 | /* Fetch all floating-point registers from process/thread TID and store | |
305 | their values in GDB's register cache. */ | |
306 | static void | |
56be3814 | 307 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
308 | { |
309 | fpregset_t fpregs; | |
310 | ptrace_area parea; | |
311 | ||
312 | parea.len = sizeof (fpregs); | |
313 | parea.process_addr = (addr_t) &fpregs; | |
314 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 315 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 316 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 317 | |
56be3814 | 318 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
319 | } |
320 | ||
321 | /* Store all valid floating-point registers in GDB's register cache | |
322 | into the process/thread specified by TID. */ | |
323 | static void | |
56be3814 | 324 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
325 | { |
326 | fpregset_t fpregs; | |
327 | ptrace_area parea; | |
328 | ||
329 | parea.len = sizeof (fpregs); | |
330 | parea.process_addr = (addr_t) &fpregs; | |
331 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 332 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 333 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 334 | |
56be3814 | 335 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 336 | |
2b4cab86 | 337 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 338 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
339 | } |
340 | ||
99b7da5d AA |
341 | /* Fetch all registers in the kernel's register set whose number is |
342 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
343 | REGSET, from process/thread TID and store their values in GDB's | |
344 | register cache. */ | |
c642a434 UW |
345 | static void |
346 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 347 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 348 | { |
3451269c | 349 | void *buf = alloca (regsize); |
c642a434 | 350 | struct iovec iov; |
c642a434 UW |
351 | |
352 | iov.iov_base = buf; | |
353 | iov.iov_len = regsize; | |
354 | ||
99b7da5d | 355 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
356 | { |
357 | if (errno == ENODATA) | |
99b7da5d | 358 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
359 | else |
360 | perror_with_name (_("Couldn't get register set")); | |
361 | } | |
362 | else | |
99b7da5d | 363 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
364 | } |
365 | ||
99b7da5d AA |
366 | /* Store all registers in the kernel's register set whose number is |
367 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
368 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
369 | static void |
370 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 371 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 372 | { |
3451269c | 373 | void *buf = alloca (regsize); |
c642a434 | 374 | struct iovec iov; |
c642a434 UW |
375 | |
376 | iov.iov_base = buf; | |
377 | iov.iov_len = regsize; | |
378 | ||
99b7da5d | 379 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
380 | perror_with_name (_("Couldn't get register set")); |
381 | ||
99b7da5d | 382 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 383 | |
99b7da5d | 384 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
385 | perror_with_name (_("Couldn't set register set")); |
386 | } | |
387 | ||
388 | /* Check whether the kernel provides a register set with number REGSET | |
389 | of size REGSIZE for process/thread TID. */ | |
390 | static int | |
391 | check_regset (int tid, int regset, int regsize) | |
392 | { | |
3451269c | 393 | void *buf = alloca (regsize); |
c642a434 UW |
394 | struct iovec iov; |
395 | ||
396 | iov.iov_base = buf; | |
397 | iov.iov_len = regsize; | |
398 | ||
4ac33720 UW |
399 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
400 | || errno == ENODATA) | |
c642a434 | 401 | return 1; |
4ac33720 | 402 | return 0; |
c642a434 UW |
403 | } |
404 | ||
d0f54f9d JB |
405 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
406 | this for all registers. */ | |
f6ac5f3d PA |
407 | void |
408 | s390_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 409 | { |
222312d3 | 410 | pid_t tid = get_ptrace_pid (regcache->ptid ()); |
d0f54f9d | 411 | |
2ccd1468 | 412 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 413 | fetch_regs (regcache, tid); |
d0f54f9d | 414 | |
2ccd1468 | 415 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 416 | fetch_fpregs (regcache, tid); |
c642a434 UW |
417 | |
418 | if (have_regset_last_break) | |
419 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
420 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
ac7936df | 421 | (gdbarch_ptr_bit (regcache->arch ()) == 32 |
99b7da5d | 422 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
423 | |
424 | if (have_regset_system_call) | |
425 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
426 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 427 | &s390_system_call_regset); |
4ac33720 UW |
428 | |
429 | if (have_regset_tdb) | |
430 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
431 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 432 | &s390_tdb_regset); |
550bdf96 AA |
433 | |
434 | if (have_regset_vxrs) | |
435 | { | |
436 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
437 | && regnum <= S390_V15_LOWER_REGNUM)) | |
438 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
439 | &s390_vxrs_low_regset); | |
440 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
441 | && regnum <= S390_V31_REGNUM)) | |
442 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
443 | &s390_vxrs_high_regset); | |
444 | } | |
1b63490c AA |
445 | |
446 | if (have_regset_gs) | |
447 | { | |
448 | if (regnum == -1 || (regnum >= S390_GSD_REGNUM | |
449 | && regnum <= S390_GSEPLA_REGNUM)) | |
450 | fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8, | |
451 | &s390_gs_regset); | |
452 | if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM | |
453 | && regnum <= S390_BC_GSEPLA_REGNUM)) | |
454 | fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8, | |
455 | &s390_gsbc_regset); | |
456 | } | |
d0f54f9d JB |
457 | } |
458 | ||
459 | /* Store register REGNUM back into the child process. If REGNUM is | |
460 | -1, do this for all registers. */ | |
f6ac5f3d PA |
461 | void |
462 | s390_linux_nat_target::store_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 463 | { |
222312d3 | 464 | pid_t tid = get_ptrace_pid (regcache->ptid ()); |
d0f54f9d | 465 | |
2ccd1468 | 466 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 467 | store_regs (regcache, tid, regnum); |
d0f54f9d | 468 | |
2ccd1468 | 469 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 470 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
471 | |
472 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
473 | ||
474 | if (have_regset_system_call) | |
475 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
476 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 477 | &s390_system_call_regset); |
550bdf96 AA |
478 | |
479 | if (have_regset_vxrs) | |
480 | { | |
481 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
482 | && regnum <= S390_V15_LOWER_REGNUM)) | |
483 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
484 | &s390_vxrs_low_regset); | |
485 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
486 | && regnum <= S390_V31_REGNUM)) | |
487 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
488 | &s390_vxrs_high_regset); | |
489 | } | |
5769d3cd AC |
490 | } |
491 | ||
d0f54f9d | 492 | |
e1457d83 JB |
493 | /* Hardware-assisted watchpoint handling. */ |
494 | ||
373c3dad AA |
495 | /* For each process we maintain a list of all currently active |
496 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
497 | |
498 | The only thing we actually need is the total address space area | |
499 | spanned by the watchpoints. */ | |
500 | ||
17c84cca | 501 | typedef struct watch_area |
5769d3cd | 502 | { |
5769d3cd AC |
503 | CORE_ADDR lo_addr; |
504 | CORE_ADDR hi_addr; | |
17c84cca AA |
505 | } s390_watch_area; |
506 | ||
507 | DEF_VEC_O (s390_watch_area); | |
5769d3cd | 508 | |
373c3dad AA |
509 | /* Hardware debug state. */ |
510 | ||
511 | struct s390_debug_reg_state | |
512 | { | |
513 | VEC_s390_watch_area *watch_areas; | |
8193adea | 514 | VEC_s390_watch_area *break_areas; |
373c3dad AA |
515 | }; |
516 | ||
517 | /* Per-process data. */ | |
518 | ||
519 | struct s390_process_info | |
520 | { | |
521 | struct s390_process_info *next; | |
522 | pid_t pid; | |
523 | struct s390_debug_reg_state state; | |
524 | }; | |
525 | ||
526 | static struct s390_process_info *s390_process_list = NULL; | |
527 | ||
528 | /* Find process data for process PID. */ | |
529 | ||
530 | static struct s390_process_info * | |
531 | s390_find_process_pid (pid_t pid) | |
532 | { | |
533 | struct s390_process_info *proc; | |
534 | ||
535 | for (proc = s390_process_list; proc; proc = proc->next) | |
536 | if (proc->pid == pid) | |
537 | return proc; | |
538 | ||
539 | return NULL; | |
540 | } | |
541 | ||
542 | /* Add process data for process PID. Returns newly allocated info | |
543 | object. */ | |
544 | ||
545 | static struct s390_process_info * | |
546 | s390_add_process (pid_t pid) | |
547 | { | |
548 | struct s390_process_info *proc = XCNEW (struct s390_process_info); | |
549 | ||
550 | proc->pid = pid; | |
551 | proc->next = s390_process_list; | |
552 | s390_process_list = proc; | |
553 | ||
554 | return proc; | |
555 | } | |
556 | ||
557 | /* Get data specific info for process PID, creating it if necessary. | |
558 | Never returns NULL. */ | |
559 | ||
560 | static struct s390_process_info * | |
561 | s390_process_info_get (pid_t pid) | |
562 | { | |
563 | struct s390_process_info *proc; | |
564 | ||
565 | proc = s390_find_process_pid (pid); | |
566 | if (proc == NULL) | |
567 | proc = s390_add_process (pid); | |
568 | ||
569 | return proc; | |
570 | } | |
571 | ||
572 | /* Get hardware debug state for process PID. */ | |
573 | ||
574 | static struct s390_debug_reg_state * | |
575 | s390_get_debug_reg_state (pid_t pid) | |
576 | { | |
577 | return &s390_process_info_get (pid)->state; | |
578 | } | |
579 | ||
580 | /* Called whenever GDB is no longer debugging process PID. It deletes | |
581 | data structures that keep track of hardware debug state. */ | |
582 | ||
135340af PA |
583 | void |
584 | s390_linux_nat_target::low_forget_process (pid_t pid) | |
373c3dad AA |
585 | { |
586 | struct s390_process_info *proc, **proc_link; | |
587 | ||
588 | proc = s390_process_list; | |
589 | proc_link = &s390_process_list; | |
590 | ||
591 | while (proc != NULL) | |
592 | { | |
593 | if (proc->pid == pid) | |
594 | { | |
595 | VEC_free (s390_watch_area, proc->state.watch_areas); | |
8193adea | 596 | VEC_free (s390_watch_area, proc->state.break_areas); |
373c3dad AA |
597 | *proc_link = proc->next; |
598 | xfree (proc); | |
599 | return; | |
600 | } | |
601 | ||
602 | proc_link = &proc->next; | |
603 | proc = *proc_link; | |
604 | } | |
605 | } | |
606 | ||
607 | /* linux_nat_new_fork hook. */ | |
608 | ||
135340af PA |
609 | void |
610 | s390_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid) | |
373c3dad AA |
611 | { |
612 | pid_t parent_pid; | |
613 | struct s390_debug_reg_state *parent_state; | |
614 | struct s390_debug_reg_state *child_state; | |
615 | ||
616 | /* NULL means no watchpoint has ever been set in the parent. In | |
617 | that case, there's nothing to do. */ | |
618 | if (lwp_arch_private_info (parent) == NULL) | |
619 | return; | |
620 | ||
621 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
622 | the parent. So copy the debug state from parent to child. */ | |
623 | ||
e99b03dc | 624 | parent_pid = parent->ptid.pid (); |
373c3dad AA |
625 | parent_state = s390_get_debug_reg_state (parent_pid); |
626 | child_state = s390_get_debug_reg_state (child_pid); | |
627 | ||
628 | child_state->watch_areas = VEC_copy (s390_watch_area, | |
629 | parent_state->watch_areas); | |
8193adea AA |
630 | child_state->break_areas = VEC_copy (s390_watch_area, |
631 | parent_state->break_areas); | |
373c3dad | 632 | } |
5769d3cd | 633 | |
169fe0df AA |
634 | /* Dump PER state. */ |
635 | ||
636 | static void | |
637 | s390_show_debug_regs (int tid, const char *where) | |
638 | { | |
639 | per_struct per_info; | |
640 | ptrace_area parea; | |
641 | ||
642 | parea.len = sizeof (per_info); | |
643 | parea.process_addr = (addr_t) &per_info; | |
644 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
645 | ||
646 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
647 | perror_with_name (_("Couldn't retrieve debug regs")); | |
648 | ||
649 | debug_printf ("PER (debug) state for %d -- %s\n" | |
650 | " cr9-11: %lx %lx %lx\n" | |
651 | " start, end: %lx %lx\n" | |
652 | " code/ATMID: %x address: %lx PAID: %x\n", | |
653 | tid, | |
654 | where, | |
655 | per_info.control_regs.words.cr[0], | |
656 | per_info.control_regs.words.cr[1], | |
657 | per_info.control_regs.words.cr[2], | |
658 | per_info.starting_addr, | |
659 | per_info.ending_addr, | |
660 | per_info.lowcore.words.perc_atmid, | |
661 | per_info.lowcore.words.address, | |
662 | per_info.lowcore.words.access_id); | |
663 | } | |
664 | ||
57810aa7 | 665 | bool |
f6ac5f3d | 666 | s390_linux_nat_target::stopped_by_watchpoint () |
5769d3cd | 667 | { |
373c3dad | 668 | struct s390_debug_reg_state *state |
e99b03dc | 669 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
5769d3cd AC |
670 | per_lowcore_bits per_lowcore; |
671 | ptrace_area parea; | |
672 | ||
169fe0df AA |
673 | if (show_debug_regs) |
674 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
675 | ||
e1457d83 | 676 | /* Speed up common case. */ |
373c3dad | 677 | if (VEC_empty (s390_watch_area, state->watch_areas)) |
57810aa7 | 678 | return false; |
e1457d83 | 679 | |
5769d3cd AC |
680 | parea.len = sizeof (per_lowcore); |
681 | parea.process_addr = (addr_t) & per_lowcore; | |
682 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 683 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 684 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 685 | |
57810aa7 PA |
686 | bool result = (per_lowcore.perc_storage_alteration == 1 |
687 | && per_lowcore.perc_store_real_address == 0); | |
9f0bdab8 DJ |
688 | |
689 | if (result) | |
690 | { | |
691 | /* Do not report this watchpoint again. */ | |
692 | memset (&per_lowcore, 0, sizeof (per_lowcore)); | |
2b4cab86 | 693 | if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
9f0bdab8 DJ |
694 | perror_with_name (_("Couldn't clear watchpoint status")); |
695 | } | |
696 | ||
697 | return result; | |
e1457d83 | 698 | } |
5769d3cd | 699 | |
18396193 AA |
700 | /* Each time before resuming a thread, update its PER info. */ |
701 | ||
135340af PA |
702 | void |
703 | s390_linux_nat_target::low_prepare_to_resume (struct lwp_info *lp) | |
5769d3cd | 704 | { |
9f0bdab8 | 705 | int tid; |
e99b03dc | 706 | pid_t pid = ptid_of_lwp (lp).pid (); |
e1457d83 | 707 | |
5769d3cd AC |
708 | per_struct per_info; |
709 | ptrace_area parea; | |
710 | ||
e1457d83 | 711 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
17c84cca AA |
712 | unsigned ix; |
713 | s390_watch_area *area; | |
9c2996c9 | 714 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 715 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 716 | int step = lwp_is_stepping (lp); |
e1457d83 | 717 | |
8193adea AA |
718 | /* Nothing to do if there was never any PER info for this thread. */ |
719 | if (lp_priv == NULL) | |
18396193 AA |
720 | return; |
721 | ||
8193adea AA |
722 | /* If PER info has changed, update it. When single-stepping, disable |
723 | hardware breakpoints (if any). Otherwise we're done. */ | |
724 | if (!lp_priv->per_info_changed) | |
725 | { | |
726 | if (!step || VEC_empty (s390_watch_area, state->break_areas)) | |
727 | return; | |
728 | } | |
729 | ||
9c2996c9 | 730 | lp_priv->per_info_changed = 0; |
18396193 | 731 | |
e38504b3 | 732 | tid = ptid_of_lwp (lp).lwp (); |
9f0bdab8 | 733 | if (tid == 0) |
373c3dad | 734 | tid = pid; |
9f0bdab8 | 735 | |
5769d3cd AC |
736 | parea.len = sizeof (per_info); |
737 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 738 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
739 | |
740 | /* Clear PER info, but adjust the single_step field (used by older | |
741 | kernels only). */ | |
742 | memset (&per_info, 0, sizeof (per_info)); | |
743 | per_info.single_step = (step != 0); | |
e1457d83 | 744 | |
373c3dad | 745 | if (!VEC_empty (s390_watch_area, state->watch_areas)) |
5769d3cd | 746 | { |
17c84cca | 747 | for (ix = 0; |
373c3dad | 748 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca AA |
749 | ix++) |
750 | { | |
325fac50 PA |
751 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
752 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
17c84cca AA |
753 | } |
754 | ||
8193adea AA |
755 | /* Enable storage-alteration events. */ |
756 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
757 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 758 | } |
8193adea AA |
759 | |
760 | if (!VEC_empty (s390_watch_area, state->break_areas)) | |
5769d3cd | 761 | { |
8193adea AA |
762 | /* Don't install hardware breakpoints while single-stepping, since |
763 | our PER settings (e.g. the nullification bit) might then conflict | |
764 | with the kernel's. But re-install them afterwards. */ | |
765 | if (step) | |
766 | lp_priv->per_info_changed = 1; | |
767 | else | |
768 | { | |
769 | for (ix = 0; | |
770 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
771 | ix++) | |
772 | { | |
325fac50 PA |
773 | watch_lo_addr = std::min (watch_lo_addr, area->lo_addr); |
774 | watch_hi_addr = std::max (watch_hi_addr, area->hi_addr); | |
8193adea AA |
775 | } |
776 | ||
777 | /* If there's just one breakpoint, enable instruction-fetching | |
778 | nullification events for the breakpoint address (fast). | |
779 | Otherwise stop after any instruction within the PER area and | |
780 | after any branch into it (slow). */ | |
781 | if (watch_hi_addr == watch_lo_addr) | |
782 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
783 | | PER_EVENT_IFETCH); | |
784 | else | |
785 | { | |
786 | /* The PER area must include the instruction before the | |
787 | first breakpoint address. */ | |
788 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
789 | per_info.control_regs.words.cr[0] | |
790 | |= (PER_EVENT_BRANCH | |
791 | | PER_EVENT_IFETCH | |
792 | | PER_CONTROL_BRANCH_ADDRESS); | |
793 | } | |
794 | } | |
5769d3cd AC |
795 | } |
796 | per_info.starting_addr = watch_lo_addr; | |
797 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 798 | |
2b4cab86 | 799 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 800 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
801 | |
802 | if (show_debug_regs) | |
803 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
804 | } |
805 | ||
9c2996c9 | 806 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
807 | |
808 | static void | |
9c2996c9 | 809 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 810 | { |
9c2996c9 AA |
811 | if (lwp_arch_private_info (lp) == NULL) |
812 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 813 | |
9c2996c9 | 814 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
815 | } |
816 | ||
817 | /* When attaching to a new thread, mark its PER info as changed. */ | |
818 | ||
135340af PA |
819 | void |
820 | s390_linux_nat_target::low_new_thread (struct lwp_info *lp) | |
18396193 | 821 | { |
9c2996c9 AA |
822 | s390_mark_per_info_changed (lp); |
823 | } | |
824 | ||
466eecee SM |
825 | /* Function to call when a thread is being deleted. */ |
826 | ||
135340af PA |
827 | void |
828 | s390_linux_nat_target::low_delete_thread (struct arch_lwp_info *arch_lwp) | |
466eecee SM |
829 | { |
830 | xfree (arch_lwp); | |
831 | } | |
832 | ||
9c2996c9 AA |
833 | /* Iterator callback for s390_refresh_per_info. */ |
834 | ||
835 | static int | |
836 | s390_refresh_per_info_cb (struct lwp_info *lp, void *arg) | |
837 | { | |
838 | s390_mark_per_info_changed (lp); | |
839 | ||
840 | if (!lwp_is_stopped (lp)) | |
841 | linux_stop_lwp (lp); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
846 | ||
847 | static int | |
848 | s390_refresh_per_info (void) | |
849 | { | |
e99b03dc | 850 | ptid_t pid_ptid = ptid_t (current_lwp_ptid ().pid ()); |
9c2996c9 AA |
851 | |
852 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL); | |
853 | return 0; | |
18396193 AA |
854 | } |
855 | ||
f6ac5f3d PA |
856 | int |
857 | s390_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len, | |
858 | enum target_hw_bp_type type, | |
859 | struct expression *cond) | |
5769d3cd | 860 | { |
17c84cca | 861 | s390_watch_area area; |
373c3dad | 862 | struct s390_debug_reg_state *state |
e99b03dc | 863 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
9f0bdab8 | 864 | |
17c84cca AA |
865 | area.lo_addr = addr; |
866 | area.hi_addr = addr + len - 1; | |
373c3dad | 867 | VEC_safe_push (s390_watch_area, state->watch_areas, &area); |
e1457d83 | 868 | |
9c2996c9 | 869 | return s390_refresh_per_info (); |
5769d3cd AC |
870 | } |
871 | ||
f6ac5f3d PA |
872 | int |
873 | s390_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len, | |
874 | enum target_hw_bp_type type, | |
875 | struct expression *cond) | |
5769d3cd | 876 | { |
17c84cca AA |
877 | unsigned ix; |
878 | s390_watch_area *area; | |
373c3dad | 879 | struct s390_debug_reg_state *state |
e99b03dc | 880 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
e1457d83 | 881 | |
17c84cca | 882 | for (ix = 0; |
373c3dad | 883 | VEC_iterate (s390_watch_area, state->watch_areas, ix, area); |
17c84cca | 884 | ix++) |
5769d3cd | 885 | { |
17c84cca AA |
886 | if (area->lo_addr == addr && area->hi_addr == addr + len - 1) |
887 | { | |
373c3dad | 888 | VEC_unordered_remove (s390_watch_area, state->watch_areas, ix); |
17c84cca AA |
889 | return s390_refresh_per_info (); |
890 | } | |
5769d3cd | 891 | } |
e1457d83 | 892 | |
17c84cca AA |
893 | fprintf_unfiltered (gdb_stderr, |
894 | "Attempt to remove nonexistent watchpoint.\n"); | |
895 | return -1; | |
5769d3cd AC |
896 | } |
897 | ||
8193adea AA |
898 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
899 | ||
f6ac5f3d PA |
900 | int |
901 | s390_linux_nat_target::can_use_hw_breakpoint (enum bptype type, | |
902 | int cnt, int othertype) | |
fd7979d1 | 903 | { |
8193adea AA |
904 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
905 | return 1; | |
906 | return 0; | |
907 | } | |
908 | ||
909 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
910 | ||
f6ac5f3d PA |
911 | int |
912 | s390_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch, | |
913 | struct bp_target_info *bp_tgt) | |
8193adea AA |
914 | { |
915 | s390_watch_area area; | |
916 | struct s390_debug_reg_state *state; | |
917 | ||
918 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
919 | area.hi_addr = area.lo_addr; | |
e99b03dc | 920 | state = s390_get_debug_reg_state (inferior_ptid.pid ()); |
8193adea AA |
921 | VEC_safe_push (s390_watch_area, state->break_areas, &area); |
922 | ||
923 | return s390_refresh_per_info (); | |
924 | } | |
925 | ||
926 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
927 | ||
f6ac5f3d PA |
928 | int |
929 | s390_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch, | |
930 | struct bp_target_info *bp_tgt) | |
8193adea AA |
931 | { |
932 | unsigned ix; | |
933 | struct watch_area *area; | |
934 | struct s390_debug_reg_state *state; | |
935 | ||
e99b03dc | 936 | state = s390_get_debug_reg_state (inferior_ptid.pid ()); |
8193adea AA |
937 | for (ix = 0; |
938 | VEC_iterate (s390_watch_area, state->break_areas, ix, area); | |
939 | ix++) | |
940 | { | |
941 | if (area->lo_addr == bp_tgt->placed_address) | |
942 | { | |
943 | VEC_unordered_remove (s390_watch_area, state->break_areas, ix); | |
944 | return s390_refresh_per_info (); | |
945 | } | |
946 | } | |
947 | ||
948 | fprintf_unfiltered (gdb_stderr, | |
949 | "Attempt to remove nonexistent breakpoint.\n"); | |
950 | return -1; | |
fd7979d1 | 951 | } |
e1457d83 | 952 | |
f6ac5f3d PA |
953 | int |
954 | s390_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt) | |
5769d3cd | 955 | { |
fd7979d1 | 956 | return 1; |
5769d3cd AC |
957 | } |
958 | ||
7803799a UW |
959 | static int |
960 | s390_target_wordsize (void) | |
961 | { | |
962 | int wordsize = 4; | |
963 | ||
964 | /* Check for 64-bit inferior process. This is the case when the host is | |
965 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
966 | #ifdef __s390x__ | |
967 | long pswm; | |
968 | ||
969 | errno = 0; | |
970 | pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0); | |
971 | if (errno == 0 && (pswm & 0x100000000ul) != 0) | |
972 | wordsize = 8; | |
973 | #endif | |
974 | ||
975 | return wordsize; | |
976 | } | |
977 | ||
f6ac5f3d PA |
978 | int |
979 | s390_linux_nat_target::auxv_parse (gdb_byte **readptr, | |
980 | gdb_byte *endptr, CORE_ADDR *typep, | |
981 | CORE_ADDR *valp) | |
7803799a UW |
982 | { |
983 | int sizeof_auxv_field = s390_target_wordsize (); | |
f5656ead | 984 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
7803799a UW |
985 | gdb_byte *ptr = *readptr; |
986 | ||
987 | if (endptr == ptr) | |
988 | return 0; | |
989 | ||
990 | if (endptr - ptr < sizeof_auxv_field * 2) | |
991 | return -1; | |
992 | ||
993 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
994 | ptr += sizeof_auxv_field; | |
995 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
996 | ptr += sizeof_auxv_field; | |
997 | ||
998 | *readptr = ptr; | |
999 | return 1; | |
1000 | } | |
1001 | ||
f6ac5f3d PA |
1002 | const struct target_desc * |
1003 | s390_linux_nat_target::read_description () | |
7803799a | 1004 | { |
c642a434 UW |
1005 | int tid = s390_inferior_tid (); |
1006 | ||
1007 | have_regset_last_break | |
1008 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
1009 | have_regset_system_call | |
1010 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
1011 | ||
7803799a UW |
1012 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
1013 | z/Architecture mode. If the target is running in 64-bit addressing | |
1014 | mode, report s390x architecture. If the target is running in 31-bit | |
1015 | addressing mode, but the kernel supports using 64-bit registers in | |
1016 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
1017 | #ifdef __s390x__ |
1018 | { | |
1019 | CORE_ADDR hwcap = 0; | |
1020 | ||
8b88a78e | 1021 | target_auxv_search (current_top_target (), AT_HWCAP, &hwcap); |
550bdf96 AA |
1022 | have_regset_tdb = (hwcap & HWCAP_S390_TE) |
1023 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
1024 | ||
1025 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
1026 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
1027 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
1028 | ||
1b63490c AA |
1029 | have_regset_gs = (hwcap & HWCAP_S390_GS) |
1030 | && check_regset (tid, NT_S390_GS_CB, 4 * 8) | |
1031 | && check_regset (tid, NT_S390_GS_BC, 4 * 8); | |
1032 | ||
550bdf96 | 1033 | if (s390_target_wordsize () == 8) |
1b63490c AA |
1034 | return (have_regset_gs ? tdesc_s390x_gs_linux64 : |
1035 | have_regset_vxrs ? | |
550bdf96 AA |
1036 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
1037 | tdesc_s390x_vx_linux64) : | |
1038 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
1039 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
1040 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
1041 | tdesc_s390x_linux64); | |
1042 | ||
1043 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
1b63490c AA |
1044 | return (have_regset_gs ? tdesc_s390_gs_linux64 : |
1045 | have_regset_vxrs ? | |
550bdf96 AA |
1046 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
1047 | tdesc_s390_vx_linux64) : | |
1048 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
1049 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
1050 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
1051 | tdesc_s390_linux64); | |
1052 | } | |
7803799a UW |
1053 | #endif |
1054 | ||
1055 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
1056 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
1057 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
1058 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
1059 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1060 | tdesc_s390_linux32); | |
7803799a | 1061 | } |
fd7979d1 | 1062 | |
10d6c8cd DJ |
1063 | void |
1064 | _initialize_s390_nat (void) | |
1065 | { | |
10d6c8cd | 1066 | /* Register the target. */ |
f6ac5f3d | 1067 | linux_target = &the_s390_linux_nat_target; |
d9f719f1 | 1068 | add_inf_child_target (&the_s390_linux_nat_target); |
169fe0df AA |
1069 | |
1070 | /* A maintenance command to enable showing the PER state. */ | |
1071 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1072 | &show_debug_regs, _("\ | |
1073 | Set whether to show the PER (debug) hardware state."), _("\ | |
1074 | Show whether to show the PER (debug) hardware state."), _("\ | |
1075 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1076 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1077 | and when the inferior triggers a breakpoint or watchpoint."), | |
1078 | NULL, | |
1079 | NULL, | |
1080 | &maintenance_set_cmdlist, | |
1081 | &maintenance_show_cmdlist); | |
10d6c8cd | 1082 | } |