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5769d3cd | 1 | /* S390 native-dependent code for GDB, the GNU debugger. |
1d506c26 | 2 | Copyright (C) 2001-2024 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" |
0df670bb | 32 | #include "gdbarch.h" |
d0f54f9d | 33 | |
d6e58945 | 34 | #include "s390-tdep.h" |
0e5fae36 | 35 | #include "s390-linux-tdep.h" |
c642a434 | 36 | #include "elf/common.h" |
d0f54f9d | 37 | |
5769d3cd | 38 | #include <asm/ptrace.h> |
5826e159 | 39 | #include "nat/gdb_ptrace.h" |
2d0c7962 | 40 | #include <asm/types.h> |
5769d3cd | 41 | #include <sys/procfs.h> |
5769d3cd | 42 | #include <sys/ucontext.h> |
7803799a | 43 | #include <elf.h> |
93689493 | 44 | #include <algorithm> |
bcc0c096 | 45 | #include "inf-ptrace.h" |
d45963c2 | 46 | #include "linux-tdep.h" |
7803799a | 47 | |
18396193 AA |
48 | /* Per-thread arch-specific data. */ |
49 | ||
50 | struct arch_lwp_info | |
51 | { | |
52 | /* Non-zero if the thread's PER info must be re-written. */ | |
53 | int per_info_changed; | |
54 | }; | |
55 | ||
c642a434 UW |
56 | static int have_regset_last_break = 0; |
57 | static int have_regset_system_call = 0; | |
4ac33720 | 58 | static int have_regset_tdb = 0; |
550bdf96 | 59 | static int have_regset_vxrs = 0; |
1b63490c | 60 | static int have_regset_gs = 0; |
5769d3cd | 61 | |
99b7da5d AA |
62 | /* Register map for 32-bit executables running under a 64-bit |
63 | kernel. */ | |
d0f54f9d JB |
64 | |
65 | #ifdef __s390x__ | |
99b7da5d AA |
66 | static const struct regcache_map_entry s390_64_regmap_gregset[] = |
67 | { | |
68 | /* Skip PSWM and PSWA, since they must be handled specially. */ | |
69 | { 2, REGCACHE_MAP_SKIP, 8 }, | |
70 | { 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 }, | |
71 | { 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 }, | |
72 | { 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 }, | |
73 | { 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 }, | |
74 | { 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 }, | |
75 | { 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 }, | |
76 | { 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 }, | |
77 | { 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 }, | |
78 | { 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 }, | |
79 | { 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 }, | |
80 | { 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 }, | |
81 | { 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 }, | |
82 | { 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 }, | |
83 | { 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 }, | |
84 | { 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 }, | |
85 | { 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 }, | |
86 | { 16, S390_A0_REGNUM, 4 }, | |
87 | { 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 }, | |
88 | { 0 } | |
89 | }; | |
90 | ||
91 | static const struct regset s390_64_gregset = | |
92 | { | |
93 | s390_64_regmap_gregset, | |
94 | regcache_supply_regset, | |
95 | regcache_collect_regset | |
96 | }; | |
97 | ||
98 | #define S390_PSWM_OFFSET 0 | |
99 | #define S390_PSWA_OFFSET 8 | |
5769d3cd | 100 | #endif |
d0f54f9d | 101 | |
8193adea AA |
102 | /* PER-event mask bits and PER control bits (CR9). */ |
103 | ||
104 | #define PER_BIT(n) (1UL << (63 - (n))) | |
105 | #define PER_EVENT_BRANCH PER_BIT (32) | |
106 | #define PER_EVENT_IFETCH PER_BIT (33) | |
107 | #define PER_EVENT_STORE PER_BIT (34) | |
108 | #define PER_EVENT_NULLIFICATION PER_BIT (39) | |
109 | #define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40) | |
110 | #define PER_CONTROL_SUSPENSION PER_BIT (41) | |
111 | #define PER_CONTROL_ALTERATION PER_BIT (42) | |
112 | ||
f6ac5f3d PA |
113 | class s390_linux_nat_target final : public linux_nat_target |
114 | { | |
115 | public: | |
116 | /* Add our register access methods. */ | |
117 | void fetch_registers (struct regcache *, int) override; | |
118 | void store_registers (struct regcache *, int) override; | |
119 | ||
120 | /* Add our watchpoint methods. */ | |
121 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
122 | int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
123 | override; | |
124 | int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
125 | override; | |
126 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
57810aa7 | 127 | bool stopped_by_watchpoint () override; |
f6ac5f3d PA |
128 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, |
129 | struct expression *) override; | |
130 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
131 | struct expression *) override; | |
132 | ||
133 | /* Detect target architecture. */ | |
134 | const struct target_desc *read_description () override; | |
3fe639b8 SM |
135 | int auxv_parse (const gdb_byte **readptr, |
136 | const gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
f6ac5f3d | 137 | override; |
135340af PA |
138 | |
139 | /* Override linux_nat_target low methods. */ | |
140 | void low_new_thread (struct lwp_info *lp) override; | |
141 | void low_delete_thread (struct arch_lwp_info *lp) override; | |
142 | void low_prepare_to_resume (struct lwp_info *lp) override; | |
143 | void low_new_fork (struct lwp_info *parent, pid_t child_pid) override; | |
144 | void low_forget_process (pid_t pid) override; | |
f6ac5f3d PA |
145 | }; |
146 | ||
147 | static s390_linux_nat_target the_s390_linux_nat_target; | |
8193adea | 148 | |
2ccd1468 UW |
149 | /* Fill GDB's register array with the general-purpose register values |
150 | in *REGP. | |
151 | ||
152 | When debugging a 32-bit executable running under a 64-bit kernel, | |
153 | we have to fix up the 64-bit registers we get from the kernel to | |
154 | make them look like 32-bit registers. */ | |
d6db1fab | 155 | |
2ccd1468 UW |
156 | void |
157 | supply_gregset (struct regcache *regcache, const gregset_t *regp) | |
158 | { | |
9cbd5950 | 159 | #ifdef __s390x__ |
ac7936df | 160 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 161 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab UW |
162 | { |
163 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
99b7da5d | 164 | ULONGEST pswm, pswa; |
2ccd1468 | 165 | gdb_byte buf[4]; |
d6db1fab | 166 | |
99b7da5d AA |
167 | regcache_supply_regset (&s390_64_gregset, regcache, -1, |
168 | regp, sizeof (gregset_t)); | |
169 | pswm = extract_unsigned_integer ((const gdb_byte *) regp | |
170 | + S390_PSWM_OFFSET, 8, byte_order); | |
171 | pswa = extract_unsigned_integer ((const gdb_byte *) regp | |
172 | + S390_PSWA_OFFSET, 8, byte_order); | |
2ccd1468 | 173 | store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000); |
73e1c03f | 174 | regcache->raw_supply (S390_PSWM_REGNUM, buf); |
2ccd1468 UW |
175 | store_unsigned_integer (buf, 4, byte_order, |
176 | (pswa & 0x7fffffff) | (pswm & 0x80000000)); | |
73e1c03f | 177 | regcache->raw_supply (S390_PSWA_REGNUM, buf); |
2ccd1468 | 178 | return; |
d6db1fab UW |
179 | } |
180 | #endif | |
181 | ||
99b7da5d AA |
182 | regcache_supply_regset (&s390_gregset, regcache, -1, regp, |
183 | sizeof (gregset_t)); | |
d6db1fab UW |
184 | } |
185 | ||
2ccd1468 UW |
186 | /* Fill register REGNO (if it is a general-purpose register) in |
187 | *REGP with the value in GDB's register array. If REGNO is -1, | |
188 | do this for all registers. */ | |
d6db1fab | 189 | |
2ccd1468 UW |
190 | void |
191 | fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno) | |
192 | { | |
d6db1fab | 193 | #ifdef __s390x__ |
ac7936df | 194 | struct gdbarch *gdbarch = regcache->arch (); |
2ccd1468 | 195 | if (gdbarch_ptr_bit (gdbarch) == 32) |
d6db1fab | 196 | { |
99b7da5d AA |
197 | regcache_collect_regset (&s390_64_gregset, regcache, regno, |
198 | regp, sizeof (gregset_t)); | |
d6db1fab | 199 | |
2ccd1468 UW |
200 | if (regno == -1 |
201 | || regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM) | |
d6db1fab | 202 | { |
2ccd1468 UW |
203 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
204 | ULONGEST pswa, pswm; | |
d6db1fab | 205 | gdb_byte buf[4]; |
2492f0d0 AA |
206 | gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET; |
207 | gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET; | |
d6db1fab | 208 | |
2492f0d0 | 209 | pswm = extract_unsigned_integer (pswm_p, 8, byte_order); |
d6db1fab | 210 | |
2ccd1468 | 211 | if (regno == -1 || regno == S390_PSWM_REGNUM) |
2492f0d0 AA |
212 | { |
213 | pswm &= 0x80000000; | |
34a79281 | 214 | regcache->raw_collect (S390_PSWM_REGNUM, buf); |
2492f0d0 AA |
215 | pswm |= (extract_unsigned_integer (buf, 4, byte_order) |
216 | & 0xfff7ffff) << 32; | |
217 | } | |
218 | ||
2ccd1468 | 219 | if (regno == -1 || regno == S390_PSWA_REGNUM) |
2492f0d0 | 220 | { |
34a79281 | 221 | regcache->raw_collect (S390_PSWA_REGNUM, buf); |
2492f0d0 AA |
222 | pswa = extract_unsigned_integer (buf, 4, byte_order); |
223 | pswm ^= (pswm ^ pswa) & 0x80000000; | |
224 | pswa &= 0x7fffffff; | |
225 | store_unsigned_integer (pswa_p, 8, byte_order, pswa); | |
226 | } | |
227 | ||
228 | store_unsigned_integer (pswm_p, 8, byte_order, pswm); | |
d6db1fab | 229 | } |
2ccd1468 | 230 | return; |
d6db1fab | 231 | } |
9cbd5950 JB |
232 | #endif |
233 | ||
99b7da5d AA |
234 | regcache_collect_regset (&s390_gregset, regcache, regno, regp, |
235 | sizeof (gregset_t)); | |
d0f54f9d JB |
236 | } |
237 | ||
238 | /* Fill GDB's register array with the floating-point register values | |
239 | in *REGP. */ | |
240 | void | |
7f7fe91e | 241 | supply_fpregset (struct regcache *regcache, const fpregset_t *regp) |
d0f54f9d | 242 | { |
99b7da5d AA |
243 | regcache_supply_regset (&s390_fpregset, regcache, -1, regp, |
244 | sizeof (fpregset_t)); | |
d0f54f9d JB |
245 | } |
246 | ||
247 | /* Fill register REGNO (if it is a general-purpose register) in | |
248 | *REGP with the value in GDB's register array. If REGNO is -1, | |
249 | do this for all registers. */ | |
250 | void | |
7f7fe91e | 251 | fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno) |
d0f54f9d | 252 | { |
99b7da5d AA |
253 | regcache_collect_regset (&s390_fpregset, regcache, regno, regp, |
254 | sizeof (fpregset_t)); | |
d0f54f9d JB |
255 | } |
256 | ||
257 | /* Find the TID for the current inferior thread to use with ptrace. */ | |
258 | static int | |
259 | s390_inferior_tid (void) | |
260 | { | |
261 | /* GNU/Linux LWP ID's are process ID's. */ | |
e38504b3 | 262 | int tid = inferior_ptid.lwp (); |
d0f54f9d | 263 | if (tid == 0) |
e99b03dc | 264 | tid = inferior_ptid.pid (); /* Not a threaded program. */ |
d0f54f9d JB |
265 | |
266 | return tid; | |
267 | } | |
268 | ||
269 | /* Fetch all general-purpose registers from process/thread TID and | |
270 | store their values in GDB's register cache. */ | |
271 | static void | |
56be3814 | 272 | fetch_regs (struct regcache *regcache, int tid) |
d0f54f9d JB |
273 | { |
274 | gregset_t regs; | |
275 | ptrace_area parea; | |
276 | ||
277 | parea.len = sizeof (regs); | |
278 | parea.process_addr = (addr_t) ®s; | |
279 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 280 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 281 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 282 | |
56be3814 | 283 | supply_gregset (regcache, (const gregset_t *) ®s); |
d0f54f9d JB |
284 | } |
285 | ||
286 | /* Store all valid general-purpose registers in GDB's register cache | |
287 | into the process/thread specified by TID. */ | |
288 | static void | |
56be3814 | 289 | store_regs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
290 | { |
291 | gregset_t regs; | |
292 | ptrace_area parea; | |
293 | ||
294 | parea.len = sizeof (regs); | |
295 | parea.process_addr = (addr_t) ®s; | |
296 | parea.kernel_addr = offsetof (struct user_regs_struct, psw); | |
2b4cab86 | 297 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 298 | perror_with_name (_("Couldn't get registers")); |
d0f54f9d | 299 | |
56be3814 | 300 | fill_gregset (regcache, ®s, regnum); |
d0f54f9d | 301 | |
2b4cab86 | 302 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 303 | perror_with_name (_("Couldn't write registers")); |
d0f54f9d JB |
304 | } |
305 | ||
306 | /* Fetch all floating-point registers from process/thread TID and store | |
307 | their values in GDB's register cache. */ | |
308 | static void | |
56be3814 | 309 | fetch_fpregs (struct regcache *regcache, int tid) |
d0f54f9d JB |
310 | { |
311 | fpregset_t fpregs; | |
312 | ptrace_area parea; | |
313 | ||
314 | parea.len = sizeof (fpregs); | |
315 | parea.process_addr = (addr_t) &fpregs; | |
316 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 317 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 318 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 319 | |
56be3814 | 320 | supply_fpregset (regcache, (const fpregset_t *) &fpregs); |
d0f54f9d JB |
321 | } |
322 | ||
323 | /* Store all valid floating-point registers in GDB's register cache | |
324 | into the process/thread specified by TID. */ | |
325 | static void | |
56be3814 | 326 | store_fpregs (const struct regcache *regcache, int tid, int regnum) |
d0f54f9d JB |
327 | { |
328 | fpregset_t fpregs; | |
329 | ptrace_area parea; | |
330 | ||
331 | parea.len = sizeof (fpregs); | |
332 | parea.process_addr = (addr_t) &fpregs; | |
333 | parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs); | |
2b4cab86 | 334 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 335 | perror_with_name (_("Couldn't get floating point status")); |
d0f54f9d | 336 | |
56be3814 | 337 | fill_fpregset (regcache, &fpregs, regnum); |
d0f54f9d | 338 | |
2b4cab86 | 339 | if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0) |
e2e0b3e5 | 340 | perror_with_name (_("Couldn't write floating point status")); |
d0f54f9d JB |
341 | } |
342 | ||
99b7da5d AA |
343 | /* Fetch all registers in the kernel's register set whose number is |
344 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
345 | REGSET, from process/thread TID and store their values in GDB's | |
346 | register cache. */ | |
c642a434 UW |
347 | static void |
348 | fetch_regset (struct regcache *regcache, int tid, | |
99b7da5d | 349 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 350 | { |
3451269c | 351 | void *buf = alloca (regsize); |
c642a434 | 352 | struct iovec iov; |
c642a434 UW |
353 | |
354 | iov.iov_base = buf; | |
355 | iov.iov_len = regsize; | |
356 | ||
99b7da5d | 357 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
4ac33720 UW |
358 | { |
359 | if (errno == ENODATA) | |
99b7da5d | 360 | regcache_supply_regset (regset, regcache, -1, NULL, regsize); |
4ac33720 UW |
361 | else |
362 | perror_with_name (_("Couldn't get register set")); | |
363 | } | |
364 | else | |
99b7da5d | 365 | regcache_supply_regset (regset, regcache, -1, buf, regsize); |
c642a434 UW |
366 | } |
367 | ||
99b7da5d AA |
368 | /* Store all registers in the kernel's register set whose number is |
369 | REGSET_ID, whose size is REGSIZE, and whose layout is described by | |
370 | REGSET, from GDB's register cache back to process/thread TID. */ | |
c642a434 UW |
371 | static void |
372 | store_regset (struct regcache *regcache, int tid, | |
99b7da5d | 373 | int regset_id, int regsize, const struct regset *regset) |
c642a434 | 374 | { |
3451269c | 375 | void *buf = alloca (regsize); |
c642a434 | 376 | struct iovec iov; |
c642a434 UW |
377 | |
378 | iov.iov_base = buf; | |
379 | iov.iov_len = regsize; | |
380 | ||
99b7da5d | 381 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
382 | perror_with_name (_("Couldn't get register set")); |
383 | ||
99b7da5d | 384 | regcache_collect_regset (regset, regcache, -1, buf, regsize); |
c642a434 | 385 | |
99b7da5d | 386 | if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0) |
c642a434 UW |
387 | perror_with_name (_("Couldn't set register set")); |
388 | } | |
389 | ||
390 | /* Check whether the kernel provides a register set with number REGSET | |
391 | of size REGSIZE for process/thread TID. */ | |
392 | static int | |
393 | check_regset (int tid, int regset, int regsize) | |
394 | { | |
3451269c | 395 | void *buf = alloca (regsize); |
c642a434 UW |
396 | struct iovec iov; |
397 | ||
398 | iov.iov_base = buf; | |
399 | iov.iov_len = regsize; | |
400 | ||
4ac33720 UW |
401 | if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0 |
402 | || errno == ENODATA) | |
c642a434 | 403 | return 1; |
4ac33720 | 404 | return 0; |
c642a434 UW |
405 | } |
406 | ||
d0f54f9d JB |
407 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
408 | this for all registers. */ | |
f6ac5f3d PA |
409 | void |
410 | s390_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 411 | { |
222312d3 | 412 | pid_t tid = get_ptrace_pid (regcache->ptid ()); |
d0f54f9d | 413 | |
2ccd1468 | 414 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 415 | fetch_regs (regcache, tid); |
d0f54f9d | 416 | |
2ccd1468 | 417 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 418 | fetch_fpregs (regcache, tid); |
c642a434 UW |
419 | |
420 | if (have_regset_last_break) | |
421 | if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM) | |
422 | fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8, | |
ac7936df | 423 | (gdbarch_ptr_bit (regcache->arch ()) == 32 |
99b7da5d | 424 | ? &s390_last_break_regset : &s390x_last_break_regset)); |
c642a434 UW |
425 | |
426 | if (have_regset_system_call) | |
427 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
428 | fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 429 | &s390_system_call_regset); |
4ac33720 UW |
430 | |
431 | if (have_regset_tdb) | |
432 | if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum)) | |
433 | fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset, | |
99b7da5d | 434 | &s390_tdb_regset); |
550bdf96 AA |
435 | |
436 | if (have_regset_vxrs) | |
437 | { | |
438 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
439 | && regnum <= S390_V15_LOWER_REGNUM)) | |
440 | fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
441 | &s390_vxrs_low_regset); | |
442 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
443 | && regnum <= S390_V31_REGNUM)) | |
444 | fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
445 | &s390_vxrs_high_regset); | |
446 | } | |
1b63490c AA |
447 | |
448 | if (have_regset_gs) | |
449 | { | |
450 | if (regnum == -1 || (regnum >= S390_GSD_REGNUM | |
451 | && regnum <= S390_GSEPLA_REGNUM)) | |
452 | fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8, | |
453 | &s390_gs_regset); | |
454 | if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM | |
455 | && regnum <= S390_BC_GSEPLA_REGNUM)) | |
456 | fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8, | |
457 | &s390_gsbc_regset); | |
458 | } | |
d0f54f9d JB |
459 | } |
460 | ||
461 | /* Store register REGNUM back into the child process. If REGNUM is | |
462 | -1, do this for all registers. */ | |
f6ac5f3d PA |
463 | void |
464 | s390_linux_nat_target::store_registers (struct regcache *regcache, int regnum) | |
d0f54f9d | 465 | { |
222312d3 | 466 | pid_t tid = get_ptrace_pid (regcache->ptid ()); |
d0f54f9d | 467 | |
2ccd1468 | 468 | if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum)) |
56be3814 | 469 | store_regs (regcache, tid, regnum); |
d0f54f9d | 470 | |
2ccd1468 | 471 | if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum)) |
56be3814 | 472 | store_fpregs (regcache, tid, regnum); |
c642a434 UW |
473 | |
474 | /* S390_LAST_BREAK_REGNUM is read-only. */ | |
475 | ||
476 | if (have_regset_system_call) | |
477 | if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM) | |
478 | store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4, | |
99b7da5d | 479 | &s390_system_call_regset); |
550bdf96 AA |
480 | |
481 | if (have_regset_vxrs) | |
482 | { | |
483 | if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM | |
484 | && regnum <= S390_V15_LOWER_REGNUM)) | |
485 | store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8, | |
486 | &s390_vxrs_low_regset); | |
487 | if (regnum == -1 || (regnum >= S390_V16_REGNUM | |
488 | && regnum <= S390_V31_REGNUM)) | |
489 | store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16, | |
490 | &s390_vxrs_high_regset); | |
491 | } | |
5769d3cd AC |
492 | } |
493 | ||
d0f54f9d | 494 | |
e1457d83 JB |
495 | /* Hardware-assisted watchpoint handling. */ |
496 | ||
373c3dad AA |
497 | /* For each process we maintain a list of all currently active |
498 | watchpoints, in order to properly handle watchpoint removal. | |
e1457d83 JB |
499 | |
500 | The only thing we actually need is the total address space area | |
501 | spanned by the watchpoints. */ | |
502 | ||
d72a9b85 | 503 | struct watch_area |
5769d3cd | 504 | { |
5769d3cd AC |
505 | CORE_ADDR lo_addr; |
506 | CORE_ADDR hi_addr; | |
d72a9b85 | 507 | }; |
5769d3cd | 508 | |
373c3dad AA |
509 | /* Hardware debug state. */ |
510 | ||
511 | struct s390_debug_reg_state | |
512 | { | |
d72a9b85 TT |
513 | std::vector<watch_area> watch_areas; |
514 | std::vector<watch_area> break_areas; | |
373c3dad AA |
515 | }; |
516 | ||
517 | /* Per-process data. */ | |
518 | ||
519 | struct s390_process_info | |
520 | { | |
d72a9b85 TT |
521 | struct s390_process_info *next = nullptr; |
522 | pid_t pid = 0; | |
373c3dad AA |
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 | { | |
d72a9b85 | 548 | struct s390_process_info *proc = new struct s390_process_info; |
373c3dad AA |
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 | { | |
373c3dad | 595 | *proc_link = proc->next; |
d72a9b85 | 596 | delete proc; |
373c3dad AA |
597 | return; |
598 | } | |
599 | ||
600 | proc_link = &proc->next; | |
601 | proc = *proc_link; | |
602 | } | |
603 | } | |
604 | ||
605 | /* linux_nat_new_fork hook. */ | |
606 | ||
135340af PA |
607 | void |
608 | s390_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid) | |
373c3dad AA |
609 | { |
610 | pid_t parent_pid; | |
611 | struct s390_debug_reg_state *parent_state; | |
612 | struct s390_debug_reg_state *child_state; | |
613 | ||
614 | /* NULL means no watchpoint has ever been set in the parent. In | |
615 | that case, there's nothing to do. */ | |
616 | if (lwp_arch_private_info (parent) == NULL) | |
617 | return; | |
618 | ||
619 | /* GDB core assumes the child inherits the watchpoints/hw breakpoints of | |
620 | the parent. So copy the debug state from parent to child. */ | |
621 | ||
e99b03dc | 622 | parent_pid = parent->ptid.pid (); |
373c3dad AA |
623 | parent_state = s390_get_debug_reg_state (parent_pid); |
624 | child_state = s390_get_debug_reg_state (child_pid); | |
625 | ||
d72a9b85 TT |
626 | child_state->watch_areas = parent_state->watch_areas; |
627 | child_state->break_areas = parent_state->break_areas; | |
373c3dad | 628 | } |
5769d3cd | 629 | |
169fe0df AA |
630 | /* Dump PER state. */ |
631 | ||
632 | static void | |
633 | s390_show_debug_regs (int tid, const char *where) | |
634 | { | |
635 | per_struct per_info; | |
636 | ptrace_area parea; | |
637 | ||
638 | parea.len = sizeof (per_info); | |
639 | parea.process_addr = (addr_t) &per_info; | |
640 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); | |
641 | ||
642 | if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0) | |
643 | perror_with_name (_("Couldn't retrieve debug regs")); | |
644 | ||
645 | debug_printf ("PER (debug) state for %d -- %s\n" | |
646 | " cr9-11: %lx %lx %lx\n" | |
647 | " start, end: %lx %lx\n" | |
648 | " code/ATMID: %x address: %lx PAID: %x\n", | |
649 | tid, | |
650 | where, | |
651 | per_info.control_regs.words.cr[0], | |
652 | per_info.control_regs.words.cr[1], | |
653 | per_info.control_regs.words.cr[2], | |
654 | per_info.starting_addr, | |
655 | per_info.ending_addr, | |
656 | per_info.lowcore.words.perc_atmid, | |
657 | per_info.lowcore.words.address, | |
658 | per_info.lowcore.words.access_id); | |
659 | } | |
660 | ||
57810aa7 | 661 | bool |
f6ac5f3d | 662 | s390_linux_nat_target::stopped_by_watchpoint () |
5769d3cd | 663 | { |
373c3dad | 664 | struct s390_debug_reg_state *state |
e99b03dc | 665 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
5769d3cd AC |
666 | per_lowcore_bits per_lowcore; |
667 | ptrace_area parea; | |
668 | ||
169fe0df AA |
669 | if (show_debug_regs) |
670 | s390_show_debug_regs (s390_inferior_tid (), "stop"); | |
671 | ||
e1457d83 | 672 | /* Speed up common case. */ |
d72a9b85 | 673 | if (state->watch_areas.empty ()) |
57810aa7 | 674 | return false; |
e1457d83 | 675 | |
ea6929aa TV |
676 | siginfo_t siginfo; |
677 | if (!linux_nat_get_siginfo (inferior_ptid, &siginfo)) | |
678 | return false; | |
679 | if (siginfo.si_signo != SIGTRAP | |
680 | || (siginfo.si_code & 0xffff) != TRAP_HWBKPT) | |
681 | return false; | |
682 | ||
5769d3cd AC |
683 | parea.len = sizeof (per_lowcore); |
684 | parea.process_addr = (addr_t) & per_lowcore; | |
685 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore); | |
2b4cab86 | 686 | if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0) |
e2e0b3e5 | 687 | perror_with_name (_("Couldn't retrieve watchpoint status")); |
5769d3cd | 688 | |
57810aa7 PA |
689 | bool result = (per_lowcore.perc_storage_alteration == 1 |
690 | && per_lowcore.perc_store_real_address == 0); | |
9f0bdab8 | 691 | |
9f0bdab8 | 692 | return result; |
e1457d83 | 693 | } |
5769d3cd | 694 | |
18396193 AA |
695 | /* Each time before resuming a thread, update its PER info. */ |
696 | ||
135340af PA |
697 | void |
698 | s390_linux_nat_target::low_prepare_to_resume (struct lwp_info *lp) | |
5769d3cd | 699 | { |
9f0bdab8 | 700 | int tid; |
e99b03dc | 701 | pid_t pid = ptid_of_lwp (lp).pid (); |
e1457d83 | 702 | |
5769d3cd AC |
703 | per_struct per_info; |
704 | ptrace_area parea; | |
705 | ||
e1457d83 | 706 | CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0; |
9c2996c9 | 707 | struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp); |
373c3dad | 708 | struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid); |
8193adea | 709 | int step = lwp_is_stepping (lp); |
e1457d83 | 710 | |
8193adea AA |
711 | /* Nothing to do if there was never any PER info for this thread. */ |
712 | if (lp_priv == NULL) | |
18396193 AA |
713 | return; |
714 | ||
8193adea AA |
715 | /* If PER info has changed, update it. When single-stepping, disable |
716 | hardware breakpoints (if any). Otherwise we're done. */ | |
717 | if (!lp_priv->per_info_changed) | |
718 | { | |
d72a9b85 | 719 | if (!step || state->break_areas.empty ()) |
8193adea AA |
720 | return; |
721 | } | |
722 | ||
9c2996c9 | 723 | lp_priv->per_info_changed = 0; |
18396193 | 724 | |
e38504b3 | 725 | tid = ptid_of_lwp (lp).lwp (); |
9f0bdab8 | 726 | if (tid == 0) |
373c3dad | 727 | tid = pid; |
9f0bdab8 | 728 | |
5769d3cd AC |
729 | parea.len = sizeof (per_info); |
730 | parea.process_addr = (addr_t) & per_info; | |
e1457d83 | 731 | parea.kernel_addr = offsetof (struct user_regs_struct, per_info); |
8193adea AA |
732 | |
733 | /* Clear PER info, but adjust the single_step field (used by older | |
734 | kernels only). */ | |
735 | memset (&per_info, 0, sizeof (per_info)); | |
736 | per_info.single_step = (step != 0); | |
e1457d83 | 737 | |
d72a9b85 | 738 | if (!state->watch_areas.empty ()) |
5769d3cd | 739 | { |
d72a9b85 | 740 | for (const auto &area : state->watch_areas) |
17c84cca | 741 | { |
d72a9b85 TT |
742 | watch_lo_addr = std::min (watch_lo_addr, area.lo_addr); |
743 | watch_hi_addr = std::max (watch_hi_addr, area.hi_addr); | |
17c84cca AA |
744 | } |
745 | ||
8193adea AA |
746 | /* Enable storage-alteration events. */ |
747 | per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE | |
748 | | PER_CONTROL_ALTERATION); | |
5769d3cd | 749 | } |
8193adea | 750 | |
d72a9b85 | 751 | if (!state->break_areas.empty ()) |
5769d3cd | 752 | { |
8193adea AA |
753 | /* Don't install hardware breakpoints while single-stepping, since |
754 | our PER settings (e.g. the nullification bit) might then conflict | |
755 | with the kernel's. But re-install them afterwards. */ | |
756 | if (step) | |
757 | lp_priv->per_info_changed = 1; | |
758 | else | |
759 | { | |
d72a9b85 | 760 | for (const auto &area : state->break_areas) |
8193adea | 761 | { |
d72a9b85 TT |
762 | watch_lo_addr = std::min (watch_lo_addr, area.lo_addr); |
763 | watch_hi_addr = std::max (watch_hi_addr, area.hi_addr); | |
8193adea AA |
764 | } |
765 | ||
766 | /* If there's just one breakpoint, enable instruction-fetching | |
767 | nullification events for the breakpoint address (fast). | |
768 | Otherwise stop after any instruction within the PER area and | |
769 | after any branch into it (slow). */ | |
770 | if (watch_hi_addr == watch_lo_addr) | |
771 | per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION | |
772 | | PER_EVENT_IFETCH); | |
773 | else | |
774 | { | |
775 | /* The PER area must include the instruction before the | |
776 | first breakpoint address. */ | |
777 | watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0; | |
778 | per_info.control_regs.words.cr[0] | |
779 | |= (PER_EVENT_BRANCH | |
780 | | PER_EVENT_IFETCH | |
781 | | PER_CONTROL_BRANCH_ADDRESS); | |
782 | } | |
783 | } | |
5769d3cd AC |
784 | } |
785 | per_info.starting_addr = watch_lo_addr; | |
786 | per_info.ending_addr = watch_hi_addr; | |
e1457d83 | 787 | |
2b4cab86 | 788 | if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0) |
e2e0b3e5 | 789 | perror_with_name (_("Couldn't modify watchpoint status")); |
169fe0df AA |
790 | |
791 | if (show_debug_regs) | |
792 | s390_show_debug_regs (tid, "resume"); | |
5769d3cd AC |
793 | } |
794 | ||
9c2996c9 | 795 | /* Mark the PER info as changed, so the next resume will update it. */ |
18396193 AA |
796 | |
797 | static void | |
9c2996c9 | 798 | s390_mark_per_info_changed (struct lwp_info *lp) |
18396193 | 799 | { |
9c2996c9 AA |
800 | if (lwp_arch_private_info (lp) == NULL) |
801 | lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info)); | |
18396193 | 802 | |
9c2996c9 | 803 | lwp_arch_private_info (lp)->per_info_changed = 1; |
18396193 AA |
804 | } |
805 | ||
806 | /* When attaching to a new thread, mark its PER info as changed. */ | |
807 | ||
135340af PA |
808 | void |
809 | s390_linux_nat_target::low_new_thread (struct lwp_info *lp) | |
18396193 | 810 | { |
9c2996c9 AA |
811 | s390_mark_per_info_changed (lp); |
812 | } | |
813 | ||
466eecee SM |
814 | /* Function to call when a thread is being deleted. */ |
815 | ||
135340af PA |
816 | void |
817 | s390_linux_nat_target::low_delete_thread (struct arch_lwp_info *arch_lwp) | |
466eecee SM |
818 | { |
819 | xfree (arch_lwp); | |
820 | } | |
821 | ||
9c2996c9 AA |
822 | /* Iterator callback for s390_refresh_per_info. */ |
823 | ||
824 | static int | |
d3a70e03 | 825 | s390_refresh_per_info_cb (struct lwp_info *lp) |
9c2996c9 AA |
826 | { |
827 | s390_mark_per_info_changed (lp); | |
828 | ||
829 | if (!lwp_is_stopped (lp)) | |
830 | linux_stop_lwp (lp); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /* Make sure that threads are stopped and mark PER info as changed. */ | |
835 | ||
836 | static int | |
837 | s390_refresh_per_info (void) | |
838 | { | |
e99b03dc | 839 | ptid_t pid_ptid = ptid_t (current_lwp_ptid ().pid ()); |
9c2996c9 | 840 | |
d3a70e03 | 841 | iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb); |
9c2996c9 | 842 | return 0; |
18396193 AA |
843 | } |
844 | ||
f6ac5f3d PA |
845 | int |
846 | s390_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len, | |
847 | enum target_hw_bp_type type, | |
848 | struct expression *cond) | |
5769d3cd | 849 | { |
d72a9b85 | 850 | watch_area area; |
373c3dad | 851 | struct s390_debug_reg_state *state |
e99b03dc | 852 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
9f0bdab8 | 853 | |
17c84cca AA |
854 | area.lo_addr = addr; |
855 | area.hi_addr = addr + len - 1; | |
d72a9b85 | 856 | state->watch_areas.push_back (area); |
e1457d83 | 857 | |
9c2996c9 | 858 | return s390_refresh_per_info (); |
5769d3cd AC |
859 | } |
860 | ||
f6ac5f3d PA |
861 | int |
862 | s390_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len, | |
863 | enum target_hw_bp_type type, | |
864 | struct expression *cond) | |
5769d3cd | 865 | { |
17c84cca | 866 | unsigned ix; |
373c3dad | 867 | struct s390_debug_reg_state *state |
e99b03dc | 868 | = s390_get_debug_reg_state (inferior_ptid.pid ()); |
e1457d83 | 869 | |
d72a9b85 | 870 | for (ix = 0; ix < state->watch_areas.size (); ix++) |
5769d3cd | 871 | { |
d72a9b85 TT |
872 | watch_area &area = state->watch_areas[ix]; |
873 | if (area.lo_addr == addr && area.hi_addr == addr + len - 1) | |
17c84cca | 874 | { |
d72a9b85 | 875 | unordered_remove (state->watch_areas, ix); |
17c84cca AA |
876 | return s390_refresh_per_info (); |
877 | } | |
5769d3cd | 878 | } |
e1457d83 | 879 | |
6cb06a8c TT |
880 | gdb_printf (gdb_stderr, |
881 | "Attempt to remove nonexistent watchpoint.\n"); | |
17c84cca | 882 | return -1; |
5769d3cd AC |
883 | } |
884 | ||
8193adea AA |
885 | /* Implement the "can_use_hw_breakpoint" target_ops method. */ |
886 | ||
f6ac5f3d PA |
887 | int |
888 | s390_linux_nat_target::can_use_hw_breakpoint (enum bptype type, | |
889 | int cnt, int othertype) | |
fd7979d1 | 890 | { |
8193adea AA |
891 | if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint) |
892 | return 1; | |
893 | return 0; | |
894 | } | |
895 | ||
896 | /* Implement the "insert_hw_breakpoint" target_ops method. */ | |
897 | ||
f6ac5f3d PA |
898 | int |
899 | s390_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch, | |
900 | struct bp_target_info *bp_tgt) | |
8193adea | 901 | { |
d72a9b85 | 902 | watch_area area; |
8193adea AA |
903 | struct s390_debug_reg_state *state; |
904 | ||
905 | area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address; | |
906 | area.hi_addr = area.lo_addr; | |
e99b03dc | 907 | state = s390_get_debug_reg_state (inferior_ptid.pid ()); |
d72a9b85 | 908 | state->break_areas.push_back (area); |
8193adea AA |
909 | |
910 | return s390_refresh_per_info (); | |
911 | } | |
912 | ||
913 | /* Implement the "remove_hw_breakpoint" target_ops method. */ | |
914 | ||
f6ac5f3d PA |
915 | int |
916 | s390_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch, | |
917 | struct bp_target_info *bp_tgt) | |
8193adea AA |
918 | { |
919 | unsigned ix; | |
8193adea AA |
920 | struct s390_debug_reg_state *state; |
921 | ||
e99b03dc | 922 | state = s390_get_debug_reg_state (inferior_ptid.pid ()); |
d72a9b85 | 923 | for (ix = 0; state->break_areas.size (); ix++) |
8193adea | 924 | { |
d72a9b85 TT |
925 | watch_area &area = state->break_areas[ix]; |
926 | if (area.lo_addr == bp_tgt->placed_address) | |
8193adea | 927 | { |
d72a9b85 | 928 | unordered_remove (state->break_areas, ix); |
8193adea AA |
929 | return s390_refresh_per_info (); |
930 | } | |
931 | } | |
932 | ||
6cb06a8c TT |
933 | gdb_printf (gdb_stderr, |
934 | "Attempt to remove nonexistent breakpoint.\n"); | |
8193adea | 935 | return -1; |
fd7979d1 | 936 | } |
e1457d83 | 937 | |
f6ac5f3d PA |
938 | int |
939 | s390_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt) | |
5769d3cd | 940 | { |
fd7979d1 | 941 | return 1; |
5769d3cd AC |
942 | } |
943 | ||
7803799a UW |
944 | static int |
945 | s390_target_wordsize (void) | |
946 | { | |
947 | int wordsize = 4; | |
948 | ||
949 | /* Check for 64-bit inferior process. This is the case when the host is | |
950 | 64-bit, and in addition bit 32 of the PSW mask is set. */ | |
951 | #ifdef __s390x__ | |
14414227 TV |
952 | int tid = s390_inferior_tid (); |
953 | gdb_assert (tid != 0); | |
7803799a UW |
954 | long pswm; |
955 | ||
956 | errno = 0; | |
14414227 | 957 | pswm = (long) ptrace (PTRACE_PEEKUSER, tid, PT_PSWMASK, 0); |
7803799a UW |
958 | if (errno == 0 && (pswm & 0x100000000ul) != 0) |
959 | wordsize = 8; | |
960 | #endif | |
961 | ||
962 | return wordsize; | |
963 | } | |
964 | ||
f6ac5f3d | 965 | int |
3fe639b8 SM |
966 | s390_linux_nat_target::auxv_parse (const gdb_byte **readptr, |
967 | const gdb_byte *endptr, CORE_ADDR *typep, | |
f6ac5f3d | 968 | CORE_ADDR *valp) |
7803799a | 969 | { |
14414227 | 970 | gdb_assert (inferior_ptid != null_ptid); |
7803799a | 971 | int sizeof_auxv_field = s390_target_wordsize (); |
99d9c3b9 | 972 | bfd_endian byte_order = gdbarch_byte_order (current_inferior ()->arch ()); |
3fe639b8 | 973 | const gdb_byte *ptr = *readptr; |
7803799a UW |
974 | |
975 | if (endptr == ptr) | |
976 | return 0; | |
977 | ||
978 | if (endptr - ptr < sizeof_auxv_field * 2) | |
979 | return -1; | |
980 | ||
981 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
982 | ptr += sizeof_auxv_field; | |
983 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); | |
984 | ptr += sizeof_auxv_field; | |
985 | ||
986 | *readptr = ptr; | |
987 | return 1; | |
988 | } | |
989 | ||
f6ac5f3d PA |
990 | const struct target_desc * |
991 | s390_linux_nat_target::read_description () | |
7803799a | 992 | { |
a4a688ff JB |
993 | if (inferior_ptid == null_ptid) |
994 | return this->beneath ()->read_description (); | |
995 | ||
fbf3c4b9 | 996 | int tid = inferior_ptid.pid (); |
c642a434 UW |
997 | |
998 | have_regset_last_break | |
999 | = check_regset (tid, NT_S390_LAST_BREAK, 8); | |
1000 | have_regset_system_call | |
1001 | = check_regset (tid, NT_S390_SYSTEM_CALL, 4); | |
1002 | ||
7803799a UW |
1003 | /* If GDB itself is compiled as 64-bit, we are running on a machine in |
1004 | z/Architecture mode. If the target is running in 64-bit addressing | |
1005 | mode, report s390x architecture. If the target is running in 31-bit | |
1006 | addressing mode, but the kernel supports using 64-bit registers in | |
1007 | that mode, report s390 architecture with 64-bit GPRs. */ | |
550bdf96 AA |
1008 | #ifdef __s390x__ |
1009 | { | |
82d23ca8 | 1010 | CORE_ADDR hwcap = linux_get_hwcap (); |
550bdf96 | 1011 | |
550bdf96 AA |
1012 | have_regset_tdb = (hwcap & HWCAP_S390_TE) |
1013 | && check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset); | |
1014 | ||
1015 | have_regset_vxrs = (hwcap & HWCAP_S390_VX) | |
1016 | && check_regset (tid, NT_S390_VXRS_LOW, 16 * 8) | |
1017 | && check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16); | |
1018 | ||
1b63490c AA |
1019 | have_regset_gs = (hwcap & HWCAP_S390_GS) |
1020 | && check_regset (tid, NT_S390_GS_CB, 4 * 8) | |
1021 | && check_regset (tid, NT_S390_GS_BC, 4 * 8); | |
1022 | ||
550bdf96 | 1023 | if (s390_target_wordsize () == 8) |
1b63490c AA |
1024 | return (have_regset_gs ? tdesc_s390x_gs_linux64 : |
1025 | have_regset_vxrs ? | |
550bdf96 AA |
1026 | (have_regset_tdb ? tdesc_s390x_tevx_linux64 : |
1027 | tdesc_s390x_vx_linux64) : | |
1028 | have_regset_tdb ? tdesc_s390x_te_linux64 : | |
1029 | have_regset_system_call ? tdesc_s390x_linux64v2 : | |
1030 | have_regset_last_break ? tdesc_s390x_linux64v1 : | |
1031 | tdesc_s390x_linux64); | |
1032 | ||
1033 | if (hwcap & HWCAP_S390_HIGH_GPRS) | |
1b63490c AA |
1034 | return (have_regset_gs ? tdesc_s390_gs_linux64 : |
1035 | have_regset_vxrs ? | |
550bdf96 AA |
1036 | (have_regset_tdb ? tdesc_s390_tevx_linux64 : |
1037 | tdesc_s390_vx_linux64) : | |
1038 | have_regset_tdb ? tdesc_s390_te_linux64 : | |
1039 | have_regset_system_call ? tdesc_s390_linux64v2 : | |
1040 | have_regset_last_break ? tdesc_s390_linux64v1 : | |
1041 | tdesc_s390_linux64); | |
1042 | } | |
7803799a UW |
1043 | #endif |
1044 | ||
1045 | /* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior | |
1046 | on a 64-bit kernel that does not support using 64-bit registers in 31-bit | |
1047 | mode, report s390 architecture with 32-bit GPRs. */ | |
c642a434 UW |
1048 | return (have_regset_system_call? tdesc_s390_linux32v2 : |
1049 | have_regset_last_break? tdesc_s390_linux32v1 : | |
1050 | tdesc_s390_linux32); | |
7803799a | 1051 | } |
fd7979d1 | 1052 | |
6c265988 | 1053 | void _initialize_s390_nat (); |
10d6c8cd | 1054 | void |
6c265988 | 1055 | _initialize_s390_nat () |
10d6c8cd | 1056 | { |
10d6c8cd | 1057 | /* Register the target. */ |
f6ac5f3d | 1058 | linux_target = &the_s390_linux_nat_target; |
d9f719f1 | 1059 | add_inf_child_target (&the_s390_linux_nat_target); |
169fe0df AA |
1060 | |
1061 | /* A maintenance command to enable showing the PER state. */ | |
1062 | add_setshow_boolean_cmd ("show-debug-regs", class_maintenance, | |
1063 | &show_debug_regs, _("\ | |
1064 | Set whether to show the PER (debug) hardware state."), _("\ | |
1065 | Show whether to show the PER (debug) hardware state."), _("\ | |
1066 | Use \"on\" to enable, \"off\" to disable.\n\ | |
1067 | If enabled, the PER state is shown after it is changed by GDB,\n\ | |
1068 | and when the inferior triggers a breakpoint or watchpoint."), | |
1069 | NULL, | |
1070 | NULL, | |
1071 | &maintenance_set_cmdlist, | |
1072 | &maintenance_show_cmdlist); | |
10d6c8cd | 1073 | } |