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5769d3cd | 1 | /* Target-dependent code for GDB, the GNU debugger. |
ca557f44 | 2 | |
ecd75fc8 | 3 | Copyright (C) 2001-2014 Free Software Foundation, Inc. |
ca557f44 | 4 | |
5769d3cd AC |
5 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
6 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. | |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
5769d3cd AC |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
5769d3cd | 22 | |
d0f54f9d | 23 | #include "defs.h" |
5769d3cd AC |
24 | #include "arch-utils.h" |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
45741a9c | 27 | #include "infrun.h" |
5769d3cd AC |
28 | #include "symtab.h" |
29 | #include "target.h" | |
30 | #include "gdbcore.h" | |
31 | #include "gdbcmd.h" | |
5769d3cd | 32 | #include "objfiles.h" |
5769d3cd AC |
33 | #include "floatformat.h" |
34 | #include "regcache.h" | |
a8c99f38 JB |
35 | #include "trad-frame.h" |
36 | #include "frame-base.h" | |
37 | #include "frame-unwind.h" | |
a431654a | 38 | #include "dwarf2-frame.h" |
d0f54f9d JB |
39 | #include "reggroups.h" |
40 | #include "regset.h" | |
fd0407d6 | 41 | #include "value.h" |
78f8b424 | 42 | #include "gdb_assert.h" |
a89aa300 | 43 | #include "dis-asm.h" |
76a9d10f | 44 | #include "solib-svr4.h" |
3fc46200 | 45 | #include "prologue-value.h" |
70728992 | 46 | #include "linux-tdep.h" |
0e5fae36 | 47 | #include "s390-linux-tdep.h" |
4ac33720 | 48 | #include "auxv.h" |
237b092b | 49 | #include "xml-syscall.h" |
5769d3cd | 50 | |
55aa24fb SDJ |
51 | #include "stap-probe.h" |
52 | #include "ax.h" | |
53 | #include "ax-gdb.h" | |
54 | #include "user-regs.h" | |
55 | #include "cli/cli-utils.h" | |
56 | #include <ctype.h> | |
04a83fee | 57 | #include "elf/common.h" |
55aa24fb | 58 | |
7803799a | 59 | #include "features/s390-linux32.c" |
c642a434 UW |
60 | #include "features/s390-linux32v1.c" |
61 | #include "features/s390-linux32v2.c" | |
7803799a | 62 | #include "features/s390-linux64.c" |
c642a434 UW |
63 | #include "features/s390-linux64v1.c" |
64 | #include "features/s390-linux64v2.c" | |
4ac33720 | 65 | #include "features/s390-te-linux64.c" |
7803799a | 66 | #include "features/s390x-linux64.c" |
c642a434 UW |
67 | #include "features/s390x-linux64v1.c" |
68 | #include "features/s390x-linux64v2.c" | |
4ac33720 | 69 | #include "features/s390x-te-linux64.c" |
7803799a | 70 | |
237b092b AA |
71 | #define XML_SYSCALL_FILENAME_S390 "syscalls/s390-linux.xml" |
72 | #define XML_SYSCALL_FILENAME_S390X "syscalls/s390x-linux.xml" | |
73 | ||
d0f54f9d JB |
74 | /* The tdep structure. */ |
75 | ||
76 | struct gdbarch_tdep | |
5769d3cd | 77 | { |
b0cf273e JB |
78 | /* ABI version. */ |
79 | enum { ABI_LINUX_S390, ABI_LINUX_ZSERIES } abi; | |
80 | ||
7803799a UW |
81 | /* Pseudo register numbers. */ |
82 | int gpr_full_regnum; | |
83 | int pc_regnum; | |
84 | int cc_regnum; | |
85 | ||
d0f54f9d JB |
86 | /* Core file register sets. */ |
87 | const struct regset *gregset; | |
88 | int sizeof_gregset; | |
89 | ||
90 | const struct regset *fpregset; | |
91 | int sizeof_fpregset; | |
92 | }; | |
93 | ||
94 | ||
7803799a UW |
95 | /* ABI call-saved register information. */ |
96 | ||
97 | static int | |
98 | s390_register_call_saved (struct gdbarch *gdbarch, int regnum) | |
d0f54f9d | 99 | { |
7803799a UW |
100 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
101 | ||
102 | switch (tdep->abi) | |
6707b003 | 103 | { |
7803799a UW |
104 | case ABI_LINUX_S390: |
105 | if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM) | |
106 | || regnum == S390_F4_REGNUM || regnum == S390_F6_REGNUM | |
107 | || regnum == S390_A0_REGNUM) | |
108 | return 1; | |
6707b003 | 109 | |
7803799a UW |
110 | break; |
111 | ||
112 | case ABI_LINUX_ZSERIES: | |
113 | if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM) | |
114 | || (regnum >= S390_F8_REGNUM && regnum <= S390_F15_REGNUM) | |
115 | || (regnum >= S390_A0_REGNUM && regnum <= S390_A1_REGNUM)) | |
116 | return 1; | |
117 | ||
118 | break; | |
119 | } | |
120 | ||
121 | return 0; | |
5769d3cd AC |
122 | } |
123 | ||
c642a434 UW |
124 | static int |
125 | s390_cannot_store_register (struct gdbarch *gdbarch, int regnum) | |
126 | { | |
127 | /* The last-break address is read-only. */ | |
128 | return regnum == S390_LAST_BREAK_REGNUM; | |
129 | } | |
130 | ||
131 | static void | |
132 | s390_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
133 | { | |
134 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
135 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
136 | ||
137 | regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc); | |
138 | ||
139 | /* Set special SYSTEM_CALL register to 0 to prevent the kernel from | |
140 | messing with the PC we just installed, if we happen to be within | |
141 | an interrupted system call that the kernel wants to restart. | |
142 | ||
143 | Note that after we return from the dummy call, the SYSTEM_CALL and | |
144 | ORIG_R2 registers will be automatically restored, and the kernel | |
145 | continues to restart the system call at this point. */ | |
146 | if (register_size (gdbarch, S390_SYSTEM_CALL_REGNUM) > 0) | |
147 | regcache_cooked_write_unsigned (regcache, S390_SYSTEM_CALL_REGNUM, 0); | |
148 | } | |
149 | ||
7803799a | 150 | |
d0f54f9d JB |
151 | /* DWARF Register Mapping. */ |
152 | ||
2ccd1468 | 153 | static const short s390_dwarf_regmap[] = |
d0f54f9d JB |
154 | { |
155 | /* General Purpose Registers. */ | |
156 | S390_R0_REGNUM, S390_R1_REGNUM, S390_R2_REGNUM, S390_R3_REGNUM, | |
157 | S390_R4_REGNUM, S390_R5_REGNUM, S390_R6_REGNUM, S390_R7_REGNUM, | |
158 | S390_R8_REGNUM, S390_R9_REGNUM, S390_R10_REGNUM, S390_R11_REGNUM, | |
159 | S390_R12_REGNUM, S390_R13_REGNUM, S390_R14_REGNUM, S390_R15_REGNUM, | |
160 | ||
161 | /* Floating Point Registers. */ | |
162 | S390_F0_REGNUM, S390_F2_REGNUM, S390_F4_REGNUM, S390_F6_REGNUM, | |
163 | S390_F1_REGNUM, S390_F3_REGNUM, S390_F5_REGNUM, S390_F7_REGNUM, | |
164 | S390_F8_REGNUM, S390_F10_REGNUM, S390_F12_REGNUM, S390_F14_REGNUM, | |
165 | S390_F9_REGNUM, S390_F11_REGNUM, S390_F13_REGNUM, S390_F15_REGNUM, | |
166 | ||
167 | /* Control Registers (not mapped). */ | |
34201ae3 UW |
168 | -1, -1, -1, -1, -1, -1, -1, -1, |
169 | -1, -1, -1, -1, -1, -1, -1, -1, | |
d0f54f9d JB |
170 | |
171 | /* Access Registers. */ | |
172 | S390_A0_REGNUM, S390_A1_REGNUM, S390_A2_REGNUM, S390_A3_REGNUM, | |
173 | S390_A4_REGNUM, S390_A5_REGNUM, S390_A6_REGNUM, S390_A7_REGNUM, | |
174 | S390_A8_REGNUM, S390_A9_REGNUM, S390_A10_REGNUM, S390_A11_REGNUM, | |
175 | S390_A12_REGNUM, S390_A13_REGNUM, S390_A14_REGNUM, S390_A15_REGNUM, | |
176 | ||
177 | /* Program Status Word. */ | |
178 | S390_PSWM_REGNUM, | |
7803799a UW |
179 | S390_PSWA_REGNUM, |
180 | ||
181 | /* GPR Lower Half Access. */ | |
182 | S390_R0_REGNUM, S390_R1_REGNUM, S390_R2_REGNUM, S390_R3_REGNUM, | |
183 | S390_R4_REGNUM, S390_R5_REGNUM, S390_R6_REGNUM, S390_R7_REGNUM, | |
184 | S390_R8_REGNUM, S390_R9_REGNUM, S390_R10_REGNUM, S390_R11_REGNUM, | |
185 | S390_R12_REGNUM, S390_R13_REGNUM, S390_R14_REGNUM, S390_R15_REGNUM, | |
c642a434 | 186 | |
94eae614 | 187 | /* GNU/Linux-specific registers (not mapped). */ |
c642a434 | 188 | -1, -1, -1, |
d0f54f9d JB |
189 | }; |
190 | ||
191 | /* Convert DWARF register number REG to the appropriate register | |
192 | number used by GDB. */ | |
a78f21af | 193 | static int |
d3f73121 | 194 | s390_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
d0f54f9d | 195 | { |
7803799a UW |
196 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
197 | ||
198 | /* In a 32-on-64 debug scenario, debug info refers to the full 64-bit | |
199 | GPRs. Note that call frame information still refers to the 32-bit | |
200 | lower halves, because s390_adjust_frame_regnum uses register numbers | |
201 | 66 .. 81 to access GPRs. */ | |
202 | if (tdep->gpr_full_regnum != -1 && reg >= 0 && reg < 16) | |
203 | return tdep->gpr_full_regnum + reg; | |
d0f54f9d | 204 | |
16aff9a6 | 205 | if (reg >= 0 && reg < ARRAY_SIZE (s390_dwarf_regmap)) |
7803799a | 206 | return s390_dwarf_regmap[reg]; |
d0f54f9d | 207 | |
7803799a UW |
208 | warning (_("Unmapped DWARF Register #%d encountered."), reg); |
209 | return -1; | |
210 | } | |
d0f54f9d | 211 | |
7803799a UW |
212 | /* Translate a .eh_frame register to DWARF register, or adjust a |
213 | .debug_frame register. */ | |
214 | static int | |
215 | s390_adjust_frame_regnum (struct gdbarch *gdbarch, int num, int eh_frame_p) | |
216 | { | |
217 | /* See s390_dwarf_reg_to_regnum for comments. */ | |
218 | return (num >= 0 && num < 16)? num + 66 : num; | |
d0f54f9d JB |
219 | } |
220 | ||
d0f54f9d | 221 | |
7803799a UW |
222 | /* Pseudo registers. */ |
223 | ||
2ccd1468 UW |
224 | static int |
225 | regnum_is_gpr_full (struct gdbarch_tdep *tdep, int regnum) | |
226 | { | |
227 | return (tdep->gpr_full_regnum != -1 | |
228 | && regnum >= tdep->gpr_full_regnum | |
229 | && regnum <= tdep->gpr_full_regnum + 15); | |
230 | } | |
231 | ||
7803799a UW |
232 | static const char * |
233 | s390_pseudo_register_name (struct gdbarch *gdbarch, int regnum) | |
d0f54f9d | 234 | { |
7803799a | 235 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
d0f54f9d | 236 | |
7803799a UW |
237 | if (regnum == tdep->pc_regnum) |
238 | return "pc"; | |
d0f54f9d | 239 | |
7803799a UW |
240 | if (regnum == tdep->cc_regnum) |
241 | return "cc"; | |
d0f54f9d | 242 | |
2ccd1468 | 243 | if (regnum_is_gpr_full (tdep, regnum)) |
7803799a UW |
244 | { |
245 | static const char *full_name[] = { | |
246 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
247 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | |
248 | }; | |
249 | return full_name[regnum - tdep->gpr_full_regnum]; | |
d0f54f9d | 250 | } |
7803799a UW |
251 | |
252 | internal_error (__FILE__, __LINE__, _("invalid regnum")); | |
d0f54f9d JB |
253 | } |
254 | ||
7803799a UW |
255 | static struct type * |
256 | s390_pseudo_register_type (struct gdbarch *gdbarch, int regnum) | |
5769d3cd | 257 | { |
7803799a | 258 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
d0f54f9d | 259 | |
7803799a UW |
260 | if (regnum == tdep->pc_regnum) |
261 | return builtin_type (gdbarch)->builtin_func_ptr; | |
d0f54f9d | 262 | |
7803799a UW |
263 | if (regnum == tdep->cc_regnum) |
264 | return builtin_type (gdbarch)->builtin_int; | |
d0f54f9d | 265 | |
2ccd1468 | 266 | if (regnum_is_gpr_full (tdep, regnum)) |
7803799a UW |
267 | return builtin_type (gdbarch)->builtin_uint64; |
268 | ||
269 | internal_error (__FILE__, __LINE__, _("invalid regnum")); | |
5769d3cd AC |
270 | } |
271 | ||
05d1431c | 272 | static enum register_status |
7803799a UW |
273 | s390_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, |
274 | int regnum, gdb_byte *buf) | |
d0f54f9d | 275 | { |
7803799a | 276 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
e17a4113 | 277 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
7803799a | 278 | int regsize = register_size (gdbarch, regnum); |
d0f54f9d JB |
279 | ULONGEST val; |
280 | ||
7803799a | 281 | if (regnum == tdep->pc_regnum) |
d0f54f9d | 282 | { |
05d1431c PA |
283 | enum register_status status; |
284 | ||
285 | status = regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &val); | |
286 | if (status == REG_VALID) | |
287 | { | |
288 | if (register_size (gdbarch, S390_PSWA_REGNUM) == 4) | |
289 | val &= 0x7fffffff; | |
290 | store_unsigned_integer (buf, regsize, byte_order, val); | |
291 | } | |
292 | return status; | |
7803799a | 293 | } |
d0f54f9d | 294 | |
7803799a UW |
295 | if (regnum == tdep->cc_regnum) |
296 | { | |
05d1431c PA |
297 | enum register_status status; |
298 | ||
299 | status = regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val); | |
300 | if (status == REG_VALID) | |
301 | { | |
302 | if (register_size (gdbarch, S390_PSWA_REGNUM) == 4) | |
303 | val = (val >> 12) & 3; | |
304 | else | |
305 | val = (val >> 44) & 3; | |
306 | store_unsigned_integer (buf, regsize, byte_order, val); | |
307 | } | |
308 | return status; | |
7803799a | 309 | } |
d0f54f9d | 310 | |
2ccd1468 | 311 | if (regnum_is_gpr_full (tdep, regnum)) |
7803799a | 312 | { |
05d1431c | 313 | enum register_status status; |
7803799a | 314 | ULONGEST val_upper; |
05d1431c | 315 | |
7803799a UW |
316 | regnum -= tdep->gpr_full_regnum; |
317 | ||
05d1431c PA |
318 | status = regcache_raw_read_unsigned (regcache, S390_R0_REGNUM + regnum, &val); |
319 | if (status == REG_VALID) | |
320 | status = regcache_raw_read_unsigned (regcache, S390_R0_UPPER_REGNUM + regnum, | |
321 | &val_upper); | |
322 | if (status == REG_VALID) | |
323 | { | |
324 | val |= val_upper << 32; | |
325 | store_unsigned_integer (buf, regsize, byte_order, val); | |
326 | } | |
327 | return status; | |
d0f54f9d | 328 | } |
7803799a UW |
329 | |
330 | internal_error (__FILE__, __LINE__, _("invalid regnum")); | |
d0f54f9d JB |
331 | } |
332 | ||
333 | static void | |
7803799a UW |
334 | s390_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, |
335 | int regnum, const gdb_byte *buf) | |
d0f54f9d | 336 | { |
7803799a | 337 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
e17a4113 | 338 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
7803799a | 339 | int regsize = register_size (gdbarch, regnum); |
d0f54f9d JB |
340 | ULONGEST val, psw; |
341 | ||
7803799a | 342 | if (regnum == tdep->pc_regnum) |
d0f54f9d | 343 | { |
7803799a UW |
344 | val = extract_unsigned_integer (buf, regsize, byte_order); |
345 | if (register_size (gdbarch, S390_PSWA_REGNUM) == 4) | |
346 | { | |
347 | regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &psw); | |
348 | val = (psw & 0x80000000) | (val & 0x7fffffff); | |
349 | } | |
350 | regcache_raw_write_unsigned (regcache, S390_PSWA_REGNUM, val); | |
351 | return; | |
352 | } | |
d0f54f9d | 353 | |
7803799a UW |
354 | if (regnum == tdep->cc_regnum) |
355 | { | |
356 | val = extract_unsigned_integer (buf, regsize, byte_order); | |
d0f54f9d | 357 | regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw); |
7803799a UW |
358 | if (register_size (gdbarch, S390_PSWA_REGNUM) == 4) |
359 | val = (psw & ~((ULONGEST)3 << 12)) | ((val & 3) << 12); | |
360 | else | |
361 | val = (psw & ~((ULONGEST)3 << 44)) | ((val & 3) << 44); | |
362 | regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, val); | |
363 | return; | |
364 | } | |
d0f54f9d | 365 | |
2ccd1468 | 366 | if (regnum_is_gpr_full (tdep, regnum)) |
7803799a UW |
367 | { |
368 | regnum -= tdep->gpr_full_regnum; | |
369 | val = extract_unsigned_integer (buf, regsize, byte_order); | |
370 | regcache_raw_write_unsigned (regcache, S390_R0_REGNUM + regnum, | |
371 | val & 0xffffffff); | |
372 | regcache_raw_write_unsigned (regcache, S390_R0_UPPER_REGNUM + regnum, | |
373 | val >> 32); | |
374 | return; | |
d0f54f9d | 375 | } |
7803799a UW |
376 | |
377 | internal_error (__FILE__, __LINE__, _("invalid regnum")); | |
d0f54f9d JB |
378 | } |
379 | ||
380 | /* 'float' values are stored in the upper half of floating-point | |
381 | registers, even though we are otherwise a big-endian platform. */ | |
382 | ||
9acbedc0 | 383 | static struct value * |
2ed3c037 UW |
384 | s390_value_from_register (struct gdbarch *gdbarch, struct type *type, |
385 | int regnum, struct frame_id frame_id) | |
d0f54f9d | 386 | { |
2ed3c037 UW |
387 | struct value *value = default_value_from_register (gdbarch, type, |
388 | regnum, frame_id); | |
744a8059 SP |
389 | check_typedef (type); |
390 | ||
391 | if (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM | |
392 | && TYPE_LENGTH (type) < 8) | |
9acbedc0 | 393 | set_value_offset (value, 0); |
d0f54f9d | 394 | |
9acbedc0 | 395 | return value; |
d0f54f9d JB |
396 | } |
397 | ||
398 | /* Register groups. */ | |
399 | ||
a78f21af | 400 | static int |
7803799a UW |
401 | s390_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
402 | struct reggroup *group) | |
d0f54f9d JB |
403 | { |
404 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
405 | ||
d6db1fab UW |
406 | /* We usually save/restore the whole PSW, which includes PC and CC. |
407 | However, some older gdbservers may not support saving/restoring | |
408 | the whole PSW yet, and will return an XML register description | |
409 | excluding those from the save/restore register groups. In those | |
410 | cases, we still need to explicitly save/restore PC and CC in order | |
411 | to push or pop frames. Since this doesn't hurt anything if we | |
412 | already save/restore the whole PSW (it's just redundant), we add | |
413 | PC and CC at this point unconditionally. */ | |
d0f54f9d | 414 | if (group == save_reggroup || group == restore_reggroup) |
7803799a | 415 | return regnum == tdep->pc_regnum || regnum == tdep->cc_regnum; |
d0f54f9d JB |
416 | |
417 | return default_register_reggroup_p (gdbarch, regnum, group); | |
418 | } | |
419 | ||
420 | ||
2ccd1468 | 421 | /* Maps for register sets. */ |
d0f54f9d | 422 | |
2ccd1468 UW |
423 | const short s390_regmap_gregset[] = |
424 | { | |
425 | 0x00, S390_PSWM_REGNUM, | |
426 | 0x04, S390_PSWA_REGNUM, | |
427 | 0x08, S390_R0_REGNUM, | |
428 | 0x0c, S390_R1_REGNUM, | |
429 | 0x10, S390_R2_REGNUM, | |
430 | 0x14, S390_R3_REGNUM, | |
431 | 0x18, S390_R4_REGNUM, | |
432 | 0x1c, S390_R5_REGNUM, | |
433 | 0x20, S390_R6_REGNUM, | |
434 | 0x24, S390_R7_REGNUM, | |
435 | 0x28, S390_R8_REGNUM, | |
436 | 0x2c, S390_R9_REGNUM, | |
437 | 0x30, S390_R10_REGNUM, | |
438 | 0x34, S390_R11_REGNUM, | |
439 | 0x38, S390_R12_REGNUM, | |
440 | 0x3c, S390_R13_REGNUM, | |
441 | 0x40, S390_R14_REGNUM, | |
442 | 0x44, S390_R15_REGNUM, | |
443 | 0x48, S390_A0_REGNUM, | |
444 | 0x4c, S390_A1_REGNUM, | |
445 | 0x50, S390_A2_REGNUM, | |
446 | 0x54, S390_A3_REGNUM, | |
447 | 0x58, S390_A4_REGNUM, | |
448 | 0x5c, S390_A5_REGNUM, | |
449 | 0x60, S390_A6_REGNUM, | |
450 | 0x64, S390_A7_REGNUM, | |
451 | 0x68, S390_A8_REGNUM, | |
452 | 0x6c, S390_A9_REGNUM, | |
453 | 0x70, S390_A10_REGNUM, | |
454 | 0x74, S390_A11_REGNUM, | |
455 | 0x78, S390_A12_REGNUM, | |
456 | 0x7c, S390_A13_REGNUM, | |
457 | 0x80, S390_A14_REGNUM, | |
458 | 0x84, S390_A15_REGNUM, | |
459 | 0x88, S390_ORIG_R2_REGNUM, | |
460 | -1, -1 | |
461 | }; | |
d0f54f9d | 462 | |
2ccd1468 UW |
463 | const short s390x_regmap_gregset[] = |
464 | { | |
465 | 0x00, S390_PSWM_REGNUM, | |
466 | 0x08, S390_PSWA_REGNUM, | |
467 | 0x10, S390_R0_REGNUM, | |
468 | 0x18, S390_R1_REGNUM, | |
469 | 0x20, S390_R2_REGNUM, | |
470 | 0x28, S390_R3_REGNUM, | |
471 | 0x30, S390_R4_REGNUM, | |
472 | 0x38, S390_R5_REGNUM, | |
473 | 0x40, S390_R6_REGNUM, | |
474 | 0x48, S390_R7_REGNUM, | |
475 | 0x50, S390_R8_REGNUM, | |
476 | 0x58, S390_R9_REGNUM, | |
477 | 0x60, S390_R10_REGNUM, | |
478 | 0x68, S390_R11_REGNUM, | |
479 | 0x70, S390_R12_REGNUM, | |
480 | 0x78, S390_R13_REGNUM, | |
481 | 0x80, S390_R14_REGNUM, | |
482 | 0x88, S390_R15_REGNUM, | |
483 | 0x90, S390_A0_REGNUM, | |
484 | 0x94, S390_A1_REGNUM, | |
485 | 0x98, S390_A2_REGNUM, | |
486 | 0x9c, S390_A3_REGNUM, | |
487 | 0xa0, S390_A4_REGNUM, | |
488 | 0xa4, S390_A5_REGNUM, | |
489 | 0xa8, S390_A6_REGNUM, | |
490 | 0xac, S390_A7_REGNUM, | |
491 | 0xb0, S390_A8_REGNUM, | |
492 | 0xb4, S390_A9_REGNUM, | |
493 | 0xb8, S390_A10_REGNUM, | |
494 | 0xbc, S390_A11_REGNUM, | |
495 | 0xc0, S390_A12_REGNUM, | |
496 | 0xc4, S390_A13_REGNUM, | |
497 | 0xc8, S390_A14_REGNUM, | |
498 | 0xcc, S390_A15_REGNUM, | |
499 | 0x10, S390_R0_UPPER_REGNUM, | |
500 | 0x18, S390_R1_UPPER_REGNUM, | |
501 | 0x20, S390_R2_UPPER_REGNUM, | |
502 | 0x28, S390_R3_UPPER_REGNUM, | |
503 | 0x30, S390_R4_UPPER_REGNUM, | |
504 | 0x38, S390_R5_UPPER_REGNUM, | |
505 | 0x40, S390_R6_UPPER_REGNUM, | |
506 | 0x48, S390_R7_UPPER_REGNUM, | |
507 | 0x50, S390_R8_UPPER_REGNUM, | |
508 | 0x58, S390_R9_UPPER_REGNUM, | |
509 | 0x60, S390_R10_UPPER_REGNUM, | |
510 | 0x68, S390_R11_UPPER_REGNUM, | |
511 | 0x70, S390_R12_UPPER_REGNUM, | |
512 | 0x78, S390_R13_UPPER_REGNUM, | |
513 | 0x80, S390_R14_UPPER_REGNUM, | |
514 | 0x88, S390_R15_UPPER_REGNUM, | |
515 | 0xd0, S390_ORIG_R2_REGNUM, | |
516 | -1, -1 | |
517 | }; | |
d0f54f9d | 518 | |
2ccd1468 UW |
519 | const short s390_regmap_fpregset[] = |
520 | { | |
521 | 0x00, S390_FPC_REGNUM, | |
522 | 0x08, S390_F0_REGNUM, | |
523 | 0x10, S390_F1_REGNUM, | |
524 | 0x18, S390_F2_REGNUM, | |
525 | 0x20, S390_F3_REGNUM, | |
526 | 0x28, S390_F4_REGNUM, | |
527 | 0x30, S390_F5_REGNUM, | |
528 | 0x38, S390_F6_REGNUM, | |
529 | 0x40, S390_F7_REGNUM, | |
530 | 0x48, S390_F8_REGNUM, | |
531 | 0x50, S390_F9_REGNUM, | |
532 | 0x58, S390_F10_REGNUM, | |
533 | 0x60, S390_F11_REGNUM, | |
534 | 0x68, S390_F12_REGNUM, | |
535 | 0x70, S390_F13_REGNUM, | |
536 | 0x78, S390_F14_REGNUM, | |
537 | 0x80, S390_F15_REGNUM, | |
538 | -1, -1 | |
539 | }; | |
7803799a | 540 | |
2ccd1468 UW |
541 | const short s390_regmap_upper[] = |
542 | { | |
543 | 0x00, S390_R0_UPPER_REGNUM, | |
544 | 0x04, S390_R1_UPPER_REGNUM, | |
545 | 0x08, S390_R2_UPPER_REGNUM, | |
546 | 0x0c, S390_R3_UPPER_REGNUM, | |
547 | 0x10, S390_R4_UPPER_REGNUM, | |
548 | 0x14, S390_R5_UPPER_REGNUM, | |
549 | 0x18, S390_R6_UPPER_REGNUM, | |
550 | 0x1c, S390_R7_UPPER_REGNUM, | |
551 | 0x20, S390_R8_UPPER_REGNUM, | |
552 | 0x24, S390_R9_UPPER_REGNUM, | |
553 | 0x28, S390_R10_UPPER_REGNUM, | |
554 | 0x2c, S390_R11_UPPER_REGNUM, | |
555 | 0x30, S390_R12_UPPER_REGNUM, | |
556 | 0x34, S390_R13_UPPER_REGNUM, | |
557 | 0x38, S390_R14_UPPER_REGNUM, | |
558 | 0x3c, S390_R15_UPPER_REGNUM, | |
559 | -1, -1 | |
560 | }; | |
c642a434 | 561 | |
2ccd1468 UW |
562 | const short s390_regmap_last_break[] = |
563 | { | |
564 | 0x04, S390_LAST_BREAK_REGNUM, | |
565 | -1, -1 | |
566 | }; | |
567 | ||
568 | const short s390x_regmap_last_break[] = | |
569 | { | |
570 | 0x00, S390_LAST_BREAK_REGNUM, | |
571 | -1, -1 | |
572 | }; | |
573 | ||
574 | const short s390_regmap_system_call[] = | |
575 | { | |
576 | 0x00, S390_SYSTEM_CALL_REGNUM, | |
577 | -1, -1 | |
578 | }; | |
c642a434 | 579 | |
4ac33720 UW |
580 | const short s390_regmap_tdb[] = |
581 | { | |
582 | 0x00, S390_TDB_DWORD0_REGNUM, | |
583 | 0x08, S390_TDB_ABORT_CODE_REGNUM, | |
584 | 0x10, S390_TDB_CONFLICT_TOKEN_REGNUM, | |
585 | 0x18, S390_TDB_ATIA_REGNUM, | |
586 | 0x80, S390_TDB_R0_REGNUM, | |
587 | 0x88, S390_TDB_R1_REGNUM, | |
588 | 0x90, S390_TDB_R2_REGNUM, | |
589 | 0x98, S390_TDB_R3_REGNUM, | |
590 | 0xa0, S390_TDB_R4_REGNUM, | |
591 | 0xa8, S390_TDB_R5_REGNUM, | |
592 | 0xb0, S390_TDB_R6_REGNUM, | |
593 | 0xb8, S390_TDB_R7_REGNUM, | |
594 | 0xc0, S390_TDB_R8_REGNUM, | |
595 | 0xc8, S390_TDB_R9_REGNUM, | |
596 | 0xd0, S390_TDB_R10_REGNUM, | |
597 | 0xd8, S390_TDB_R11_REGNUM, | |
598 | 0xe0, S390_TDB_R12_REGNUM, | |
599 | 0xe8, S390_TDB_R13_REGNUM, | |
600 | 0xf0, S390_TDB_R14_REGNUM, | |
601 | 0xf8, S390_TDB_R15_REGNUM, | |
602 | -1, -1 | |
603 | }; | |
c642a434 | 604 | |
d0f54f9d | 605 | |
34201ae3 | 606 | /* Supply register REGNUM from the register set REGSET to register cache |
d0f54f9d JB |
607 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
608 | static void | |
609 | s390_supply_regset (const struct regset *regset, struct regcache *regcache, | |
610 | int regnum, const void *regs, size_t len) | |
611 | { | |
2ccd1468 UW |
612 | const short *map; |
613 | for (map = regset->descr; map[0] >= 0; map += 2) | |
614 | if (regnum == -1 || regnum == map[1]) | |
4ac33720 UW |
615 | regcache_raw_supply (regcache, map[1], |
616 | regs ? (const char *)regs + map[0] : NULL); | |
617 | } | |
618 | ||
619 | /* Supply the TDB regset. Like s390_supply_regset, but invalidate the | |
620 | TDB registers unless the TDB format field is valid. */ | |
621 | ||
622 | static void | |
623 | s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache, | |
624 | int regnum, const void *regs, size_t len) | |
625 | { | |
626 | ULONGEST tdw; | |
627 | enum register_status ret; | |
628 | int i; | |
629 | ||
630 | s390_supply_regset (regset, regcache, regnum, regs, len); | |
631 | ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw); | |
632 | if (ret != REG_VALID || (tdw >> 56) != 1) | |
633 | s390_supply_regset (regset, regcache, regnum, NULL, len); | |
d0f54f9d JB |
634 | } |
635 | ||
92f38ec2 UW |
636 | /* Collect register REGNUM from the register cache REGCACHE and store |
637 | it in the buffer specified by REGS and LEN as described by the | |
638 | general-purpose register set REGSET. If REGNUM is -1, do this for | |
639 | all registers in REGSET. */ | |
640 | static void | |
641 | s390_collect_regset (const struct regset *regset, | |
642 | const struct regcache *regcache, | |
643 | int regnum, void *regs, size_t len) | |
644 | { | |
2ccd1468 UW |
645 | const short *map; |
646 | for (map = regset->descr; map[0] >= 0; map += 2) | |
647 | if (regnum == -1 || regnum == map[1]) | |
648 | regcache_raw_collect (regcache, map[1], (char *)regs + map[0]); | |
92f38ec2 UW |
649 | } |
650 | ||
d0f54f9d | 651 | static const struct regset s390_gregset = { |
34201ae3 | 652 | s390_regmap_gregset, |
92f38ec2 UW |
653 | s390_supply_regset, |
654 | s390_collect_regset | |
d0f54f9d JB |
655 | }; |
656 | ||
657 | static const struct regset s390x_gregset = { | |
34201ae3 | 658 | s390x_regmap_gregset, |
92f38ec2 UW |
659 | s390_supply_regset, |
660 | s390_collect_regset | |
d0f54f9d JB |
661 | }; |
662 | ||
663 | static const struct regset s390_fpregset = { | |
34201ae3 | 664 | s390_regmap_fpregset, |
92f38ec2 UW |
665 | s390_supply_regset, |
666 | s390_collect_regset | |
d0f54f9d JB |
667 | }; |
668 | ||
7803799a | 669 | static const struct regset s390_upper_regset = { |
34201ae3 | 670 | s390_regmap_upper, |
7803799a UW |
671 | s390_supply_regset, |
672 | s390_collect_regset | |
673 | }; | |
674 | ||
c642a434 UW |
675 | static const struct regset s390_last_break_regset = { |
676 | s390_regmap_last_break, | |
677 | s390_supply_regset, | |
678 | s390_collect_regset | |
679 | }; | |
680 | ||
681 | static const struct regset s390x_last_break_regset = { | |
682 | s390x_regmap_last_break, | |
683 | s390_supply_regset, | |
684 | s390_collect_regset | |
685 | }; | |
686 | ||
687 | static const struct regset s390_system_call_regset = { | |
688 | s390_regmap_system_call, | |
689 | s390_supply_regset, | |
690 | s390_collect_regset | |
691 | }; | |
692 | ||
4ac33720 UW |
693 | static const struct regset s390_tdb_regset = { |
694 | s390_regmap_tdb, | |
695 | s390_supply_tdb_regset, | |
696 | s390_collect_regset | |
697 | }; | |
698 | ||
c642a434 UW |
699 | static struct core_regset_section s390_linux32_regset_sections[] = |
700 | { | |
701 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
702 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
703 | { NULL, 0} | |
704 | }; | |
705 | ||
706 | static struct core_regset_section s390_linux32v1_regset_sections[] = | |
707 | { | |
708 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
709 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
710 | { ".reg-s390-last-break", 8, "s390 last-break address" }, | |
711 | { NULL, 0} | |
712 | }; | |
713 | ||
714 | static struct core_regset_section s390_linux32v2_regset_sections[] = | |
715 | { | |
716 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
717 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
718 | { ".reg-s390-last-break", 8, "s390 last-break address" }, | |
719 | { ".reg-s390-system-call", 4, "s390 system-call" }, | |
720 | { NULL, 0} | |
721 | }; | |
722 | ||
723 | static struct core_regset_section s390_linux64_regset_sections[] = | |
7803799a UW |
724 | { |
725 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
726 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
727 | { ".reg-s390-high-gprs", 16*4, "s390 GPR upper halves" }, | |
728 | { NULL, 0} | |
729 | }; | |
730 | ||
c642a434 UW |
731 | static struct core_regset_section s390_linux64v1_regset_sections[] = |
732 | { | |
733 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
734 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
735 | { ".reg-s390-high-gprs", 16*4, "s390 GPR upper halves" }, | |
736 | { ".reg-s390-last-break", 8, "s930 last-break address" }, | |
737 | { NULL, 0} | |
738 | }; | |
739 | ||
740 | static struct core_regset_section s390_linux64v2_regset_sections[] = | |
741 | { | |
742 | { ".reg", s390_sizeof_gregset, "general-purpose" }, | |
743 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
744 | { ".reg-s390-high-gprs", 16*4, "s390 GPR upper halves" }, | |
745 | { ".reg-s390-last-break", 8, "s930 last-break address" }, | |
746 | { ".reg-s390-system-call", 4, "s390 system-call" }, | |
4ac33720 | 747 | { ".reg-s390-tdb", s390_sizeof_tdbregset, "s390 TDB" }, |
c642a434 UW |
748 | { NULL, 0} |
749 | }; | |
750 | ||
751 | static struct core_regset_section s390x_linux64_regset_sections[] = | |
752 | { | |
753 | { ".reg", s390x_sizeof_gregset, "general-purpose" }, | |
754 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
755 | { NULL, 0} | |
756 | }; | |
757 | ||
758 | static struct core_regset_section s390x_linux64v1_regset_sections[] = | |
759 | { | |
760 | { ".reg", s390x_sizeof_gregset, "general-purpose" }, | |
761 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
762 | { ".reg-s390-last-break", 8, "s930 last-break address" }, | |
763 | { NULL, 0} | |
764 | }; | |
765 | ||
766 | static struct core_regset_section s390x_linux64v2_regset_sections[] = | |
767 | { | |
768 | { ".reg", s390x_sizeof_gregset, "general-purpose" }, | |
769 | { ".reg2", s390_sizeof_fpregset, "floating-point" }, | |
770 | { ".reg-s390-last-break", 8, "s930 last-break address" }, | |
771 | { ".reg-s390-system-call", 4, "s390 system-call" }, | |
4ac33720 | 772 | { ".reg-s390-tdb", s390_sizeof_tdbregset, "s390 TDB" }, |
c642a434 UW |
773 | { NULL, 0} |
774 | }; | |
775 | ||
776 | ||
d0f54f9d JB |
777 | /* Return the appropriate register set for the core section identified |
778 | by SECT_NAME and SECT_SIZE. */ | |
63807e1d | 779 | static const struct regset * |
d0f54f9d JB |
780 | s390_regset_from_core_section (struct gdbarch *gdbarch, |
781 | const char *sect_name, size_t sect_size) | |
782 | { | |
783 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
784 | ||
e31dcd20 | 785 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= tdep->sizeof_gregset) |
d0f54f9d JB |
786 | return tdep->gregset; |
787 | ||
e31dcd20 | 788 | if (strcmp (sect_name, ".reg2") == 0 && sect_size >= tdep->sizeof_fpregset) |
d0f54f9d JB |
789 | return tdep->fpregset; |
790 | ||
7803799a UW |
791 | if (strcmp (sect_name, ".reg-s390-high-gprs") == 0 && sect_size >= 16*4) |
792 | return &s390_upper_regset; | |
793 | ||
c642a434 UW |
794 | if (strcmp (sect_name, ".reg-s390-last-break") == 0 && sect_size >= 8) |
795 | return (gdbarch_ptr_bit (gdbarch) == 32 | |
796 | ? &s390_last_break_regset : &s390x_last_break_regset); | |
797 | ||
798 | if (strcmp (sect_name, ".reg-s390-system-call") == 0 && sect_size >= 4) | |
799 | return &s390_system_call_regset; | |
800 | ||
4ac33720 UW |
801 | if (strcmp (sect_name, ".reg-s390-tdb") == 0 && sect_size >= 256) |
802 | return &s390_tdb_regset; | |
803 | ||
d0f54f9d | 804 | return NULL; |
5769d3cd AC |
805 | } |
806 | ||
7803799a UW |
807 | static const struct target_desc * |
808 | s390_core_read_description (struct gdbarch *gdbarch, | |
809 | struct target_ops *target, bfd *abfd) | |
810 | { | |
811 | asection *high_gprs = bfd_get_section_by_name (abfd, ".reg-s390-high-gprs"); | |
c642a434 UW |
812 | asection *v1 = bfd_get_section_by_name (abfd, ".reg-s390-last-break"); |
813 | asection *v2 = bfd_get_section_by_name (abfd, ".reg-s390-system-call"); | |
7803799a | 814 | asection *section = bfd_get_section_by_name (abfd, ".reg"); |
04a83fee | 815 | CORE_ADDR hwcap = 0; |
4ac33720 UW |
816 | |
817 | target_auxv_search (target, AT_HWCAP, &hwcap); | |
7803799a UW |
818 | if (!section) |
819 | return NULL; | |
820 | ||
821 | switch (bfd_section_size (abfd, section)) | |
822 | { | |
823 | case s390_sizeof_gregset: | |
c642a434 | 824 | if (high_gprs) |
4ac33720 UW |
825 | return ((hwcap & HWCAP_S390_TE) ? tdesc_s390_te_linux64 : |
826 | v2? tdesc_s390_linux64v2 : | |
c642a434 UW |
827 | v1? tdesc_s390_linux64v1 : tdesc_s390_linux64); |
828 | else | |
829 | return (v2? tdesc_s390_linux32v2 : | |
830 | v1? tdesc_s390_linux32v1 : tdesc_s390_linux32); | |
7803799a UW |
831 | |
832 | case s390x_sizeof_gregset: | |
4ac33720 UW |
833 | return ((hwcap & HWCAP_S390_TE) ? tdesc_s390x_te_linux64 : |
834 | v2? tdesc_s390x_linux64v2 : | |
c642a434 | 835 | v1? tdesc_s390x_linux64v1 : tdesc_s390x_linux64); |
7803799a UW |
836 | |
837 | default: | |
838 | return NULL; | |
839 | } | |
840 | } | |
841 | ||
d0f54f9d | 842 | |
4bc8c588 JB |
843 | /* Decoding S/390 instructions. */ |
844 | ||
845 | /* Named opcode values for the S/390 instructions we recognize. Some | |
846 | instructions have their opcode split across two fields; those are the | |
847 | op1_* and op2_* enums. */ | |
848 | enum | |
849 | { | |
a8c99f38 JB |
850 | op1_lhi = 0xa7, op2_lhi = 0x08, |
851 | op1_lghi = 0xa7, op2_lghi = 0x09, | |
00ce08ef | 852 | op1_lgfi = 0xc0, op2_lgfi = 0x01, |
4bc8c588 | 853 | op_lr = 0x18, |
a8c99f38 JB |
854 | op_lgr = 0xb904, |
855 | op_l = 0x58, | |
856 | op1_ly = 0xe3, op2_ly = 0x58, | |
857 | op1_lg = 0xe3, op2_lg = 0x04, | |
858 | op_lm = 0x98, | |
859 | op1_lmy = 0xeb, op2_lmy = 0x98, | |
860 | op1_lmg = 0xeb, op2_lmg = 0x04, | |
4bc8c588 | 861 | op_st = 0x50, |
a8c99f38 | 862 | op1_sty = 0xe3, op2_sty = 0x50, |
4bc8c588 | 863 | op1_stg = 0xe3, op2_stg = 0x24, |
a8c99f38 | 864 | op_std = 0x60, |
4bc8c588 | 865 | op_stm = 0x90, |
a8c99f38 | 866 | op1_stmy = 0xeb, op2_stmy = 0x90, |
4bc8c588 | 867 | op1_stmg = 0xeb, op2_stmg = 0x24, |
a8c99f38 JB |
868 | op1_aghi = 0xa7, op2_aghi = 0x0b, |
869 | op1_ahi = 0xa7, op2_ahi = 0x0a, | |
00ce08ef UW |
870 | op1_agfi = 0xc2, op2_agfi = 0x08, |
871 | op1_afi = 0xc2, op2_afi = 0x09, | |
872 | op1_algfi= 0xc2, op2_algfi= 0x0a, | |
873 | op1_alfi = 0xc2, op2_alfi = 0x0b, | |
a8c99f38 JB |
874 | op_ar = 0x1a, |
875 | op_agr = 0xb908, | |
876 | op_a = 0x5a, | |
877 | op1_ay = 0xe3, op2_ay = 0x5a, | |
878 | op1_ag = 0xe3, op2_ag = 0x08, | |
00ce08ef UW |
879 | op1_slgfi= 0xc2, op2_slgfi= 0x04, |
880 | op1_slfi = 0xc2, op2_slfi = 0x05, | |
a8c99f38 JB |
881 | op_sr = 0x1b, |
882 | op_sgr = 0xb909, | |
883 | op_s = 0x5b, | |
884 | op1_sy = 0xe3, op2_sy = 0x5b, | |
885 | op1_sg = 0xe3, op2_sg = 0x09, | |
886 | op_nr = 0x14, | |
887 | op_ngr = 0xb980, | |
888 | op_la = 0x41, | |
889 | op1_lay = 0xe3, op2_lay = 0x71, | |
890 | op1_larl = 0xc0, op2_larl = 0x00, | |
891 | op_basr = 0x0d, | |
892 | op_bas = 0x4d, | |
893 | op_bcr = 0x07, | |
894 | op_bc = 0x0d, | |
1db4e8a0 UW |
895 | op_bctr = 0x06, |
896 | op_bctgr = 0xb946, | |
897 | op_bct = 0x46, | |
898 | op1_bctg = 0xe3, op2_bctg = 0x46, | |
899 | op_bxh = 0x86, | |
900 | op1_bxhg = 0xeb, op2_bxhg = 0x44, | |
901 | op_bxle = 0x87, | |
902 | op1_bxleg= 0xeb, op2_bxleg= 0x45, | |
a8c99f38 JB |
903 | op1_bras = 0xa7, op2_bras = 0x05, |
904 | op1_brasl= 0xc0, op2_brasl= 0x05, | |
905 | op1_brc = 0xa7, op2_brc = 0x04, | |
906 | op1_brcl = 0xc0, op2_brcl = 0x04, | |
1db4e8a0 UW |
907 | op1_brct = 0xa7, op2_brct = 0x06, |
908 | op1_brctg= 0xa7, op2_brctg= 0x07, | |
909 | op_brxh = 0x84, | |
910 | op1_brxhg= 0xec, op2_brxhg= 0x44, | |
911 | op_brxle = 0x85, | |
912 | op1_brxlg= 0xec, op2_brxlg= 0x45, | |
237b092b | 913 | op_svc = 0x0a, |
4bc8c588 JB |
914 | }; |
915 | ||
916 | ||
a8c99f38 JB |
917 | /* Read a single instruction from address AT. */ |
918 | ||
919 | #define S390_MAX_INSTR_SIZE 6 | |
920 | static int | |
921 | s390_readinstruction (bfd_byte instr[], CORE_ADDR at) | |
922 | { | |
923 | static int s390_instrlen[] = { 2, 4, 4, 6 }; | |
924 | int instrlen; | |
925 | ||
8defab1a | 926 | if (target_read_memory (at, &instr[0], 2)) |
a8c99f38 JB |
927 | return -1; |
928 | instrlen = s390_instrlen[instr[0] >> 6]; | |
929 | if (instrlen > 2) | |
930 | { | |
8defab1a | 931 | if (target_read_memory (at + 2, &instr[2], instrlen - 2)) |
34201ae3 | 932 | return -1; |
a8c99f38 JB |
933 | } |
934 | return instrlen; | |
935 | } | |
936 | ||
937 | ||
4bc8c588 JB |
938 | /* The functions below are for recognizing and decoding S/390 |
939 | instructions of various formats. Each of them checks whether INSN | |
940 | is an instruction of the given format, with the specified opcodes. | |
941 | If it is, it sets the remaining arguments to the values of the | |
942 | instruction's fields, and returns a non-zero value; otherwise, it | |
943 | returns zero. | |
944 | ||
945 | These functions' arguments appear in the order they appear in the | |
946 | instruction, not in the machine-language form. So, opcodes always | |
947 | come first, even though they're sometimes scattered around the | |
948 | instructions. And displacements appear before base and extension | |
949 | registers, as they do in the assembly syntax, not at the end, as | |
950 | they do in the machine language. */ | |
a78f21af | 951 | static int |
4bc8c588 JB |
952 | is_ri (bfd_byte *insn, int op1, int op2, unsigned int *r1, int *i2) |
953 | { | |
954 | if (insn[0] == op1 && (insn[1] & 0xf) == op2) | |
955 | { | |
956 | *r1 = (insn[1] >> 4) & 0xf; | |
957 | /* i2 is a 16-bit signed quantity. */ | |
958 | *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000; | |
959 | return 1; | |
960 | } | |
961 | else | |
962 | return 0; | |
963 | } | |
8ac0e65a | 964 | |
5769d3cd | 965 | |
4bc8c588 JB |
966 | static int |
967 | is_ril (bfd_byte *insn, int op1, int op2, | |
34201ae3 | 968 | unsigned int *r1, int *i2) |
4bc8c588 JB |
969 | { |
970 | if (insn[0] == op1 && (insn[1] & 0xf) == op2) | |
971 | { | |
972 | *r1 = (insn[1] >> 4) & 0xf; | |
973 | /* i2 is a signed quantity. If the host 'int' is 32 bits long, | |
34201ae3 UW |
974 | no sign extension is necessary, but we don't want to assume |
975 | that. */ | |
4bc8c588 | 976 | *i2 = (((insn[2] << 24) |
34201ae3 UW |
977 | | (insn[3] << 16) |
978 | | (insn[4] << 8) | |
979 | | (insn[5])) ^ 0x80000000) - 0x80000000; | |
4bc8c588 JB |
980 | return 1; |
981 | } | |
982 | else | |
983 | return 0; | |
984 | } | |
985 | ||
986 | ||
987 | static int | |
988 | is_rr (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2) | |
989 | { | |
990 | if (insn[0] == op) | |
991 | { | |
992 | *r1 = (insn[1] >> 4) & 0xf; | |
993 | *r2 = insn[1] & 0xf; | |
994 | return 1; | |
995 | } | |
996 | else | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | ||
1001 | static int | |
1002 | is_rre (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2) | |
1003 | { | |
1004 | if (((insn[0] << 8) | insn[1]) == op) | |
1005 | { | |
1006 | /* Yes, insn[3]. insn[2] is unused in RRE format. */ | |
1007 | *r1 = (insn[3] >> 4) & 0xf; | |
1008 | *r2 = insn[3] & 0xf; | |
1009 | return 1; | |
1010 | } | |
1011 | else | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | ||
1016 | static int | |
1017 | is_rs (bfd_byte *insn, int op, | |
eb1bd1fb | 1018 | unsigned int *r1, unsigned int *r3, int *d2, unsigned int *b2) |
4bc8c588 JB |
1019 | { |
1020 | if (insn[0] == op) | |
1021 | { | |
1022 | *r1 = (insn[1] >> 4) & 0xf; | |
1023 | *r3 = insn[1] & 0xf; | |
1024 | *b2 = (insn[2] >> 4) & 0xf; | |
1025 | *d2 = ((insn[2] & 0xf) << 8) | insn[3]; | |
1026 | return 1; | |
1027 | } | |
1028 | else | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | ||
1033 | static int | |
a8c99f38 | 1034 | is_rsy (bfd_byte *insn, int op1, int op2, |
34201ae3 | 1035 | unsigned int *r1, unsigned int *r3, int *d2, unsigned int *b2) |
4bc8c588 JB |
1036 | { |
1037 | if (insn[0] == op1 | |
4bc8c588 JB |
1038 | && insn[5] == op2) |
1039 | { | |
1040 | *r1 = (insn[1] >> 4) & 0xf; | |
1041 | *r3 = insn[1] & 0xf; | |
1042 | *b2 = (insn[2] >> 4) & 0xf; | |
a8c99f38 | 1043 | /* The 'long displacement' is a 20-bit signed integer. */ |
34201ae3 | 1044 | *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12)) |
a8c99f38 | 1045 | ^ 0x80000) - 0x80000; |
4bc8c588 JB |
1046 | return 1; |
1047 | } | |
1048 | else | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | ||
1db4e8a0 UW |
1053 | static int |
1054 | is_rsi (bfd_byte *insn, int op, | |
34201ae3 | 1055 | unsigned int *r1, unsigned int *r3, int *i2) |
1db4e8a0 UW |
1056 | { |
1057 | if (insn[0] == op) | |
1058 | { | |
1059 | *r1 = (insn[1] >> 4) & 0xf; | |
1060 | *r3 = insn[1] & 0xf; | |
1061 | /* i2 is a 16-bit signed quantity. */ | |
1062 | *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000; | |
1063 | return 1; | |
1064 | } | |
1065 | else | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | ||
1070 | static int | |
1071 | is_rie (bfd_byte *insn, int op1, int op2, | |
34201ae3 | 1072 | unsigned int *r1, unsigned int *r3, int *i2) |
1db4e8a0 UW |
1073 | { |
1074 | if (insn[0] == op1 | |
1075 | && insn[5] == op2) | |
1076 | { | |
1077 | *r1 = (insn[1] >> 4) & 0xf; | |
1078 | *r3 = insn[1] & 0xf; | |
1079 | /* i2 is a 16-bit signed quantity. */ | |
1080 | *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000; | |
1081 | return 1; | |
1082 | } | |
1083 | else | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | ||
4bc8c588 JB |
1088 | static int |
1089 | is_rx (bfd_byte *insn, int op, | |
eb1bd1fb | 1090 | unsigned int *r1, int *d2, unsigned int *x2, unsigned int *b2) |
4bc8c588 JB |
1091 | { |
1092 | if (insn[0] == op) | |
1093 | { | |
1094 | *r1 = (insn[1] >> 4) & 0xf; | |
1095 | *x2 = insn[1] & 0xf; | |
1096 | *b2 = (insn[2] >> 4) & 0xf; | |
1097 | *d2 = ((insn[2] & 0xf) << 8) | insn[3]; | |
1098 | return 1; | |
1099 | } | |
1100 | else | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | ||
1105 | static int | |
a8c99f38 | 1106 | is_rxy (bfd_byte *insn, int op1, int op2, |
34201ae3 | 1107 | unsigned int *r1, int *d2, unsigned int *x2, unsigned int *b2) |
4bc8c588 JB |
1108 | { |
1109 | if (insn[0] == op1 | |
4bc8c588 JB |
1110 | && insn[5] == op2) |
1111 | { | |
1112 | *r1 = (insn[1] >> 4) & 0xf; | |
1113 | *x2 = insn[1] & 0xf; | |
1114 | *b2 = (insn[2] >> 4) & 0xf; | |
a8c99f38 | 1115 | /* The 'long displacement' is a 20-bit signed integer. */ |
34201ae3 | 1116 | *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12)) |
a8c99f38 | 1117 | ^ 0x80000) - 0x80000; |
4bc8c588 JB |
1118 | return 1; |
1119 | } | |
1120 | else | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | ||
3fc46200 | 1125 | /* Prologue analysis. */ |
4bc8c588 | 1126 | |
d0f54f9d JB |
1127 | #define S390_NUM_GPRS 16 |
1128 | #define S390_NUM_FPRS 16 | |
4bc8c588 | 1129 | |
a8c99f38 JB |
1130 | struct s390_prologue_data { |
1131 | ||
ee1b3323 UW |
1132 | /* The stack. */ |
1133 | struct pv_area *stack; | |
1134 | ||
e17a4113 | 1135 | /* The size and byte-order of a GPR or FPR. */ |
a8c99f38 JB |
1136 | int gpr_size; |
1137 | int fpr_size; | |
e17a4113 | 1138 | enum bfd_endian byte_order; |
a8c99f38 JB |
1139 | |
1140 | /* The general-purpose registers. */ | |
3fc46200 | 1141 | pv_t gpr[S390_NUM_GPRS]; |
a8c99f38 JB |
1142 | |
1143 | /* The floating-point registers. */ | |
3fc46200 | 1144 | pv_t fpr[S390_NUM_FPRS]; |
a8c99f38 | 1145 | |
121d8485 UW |
1146 | /* The offset relative to the CFA where the incoming GPR N was saved |
1147 | by the function prologue. 0 if not saved or unknown. */ | |
1148 | int gpr_slot[S390_NUM_GPRS]; | |
4bc8c588 | 1149 | |
121d8485 UW |
1150 | /* Likewise for FPRs. */ |
1151 | int fpr_slot[S390_NUM_FPRS]; | |
4bc8c588 | 1152 | |
121d8485 UW |
1153 | /* Nonzero if the backchain was saved. This is assumed to be the |
1154 | case when the incoming SP is saved at the current SP location. */ | |
1155 | int back_chain_saved_p; | |
1156 | }; | |
4bc8c588 | 1157 | |
3fc46200 UW |
1158 | /* Return the effective address for an X-style instruction, like: |
1159 | ||
34201ae3 | 1160 | L R1, D2(X2, B2) |
3fc46200 UW |
1161 | |
1162 | Here, X2 and B2 are registers, and D2 is a signed 20-bit | |
1163 | constant; the effective address is the sum of all three. If either | |
1164 | X2 or B2 are zero, then it doesn't contribute to the sum --- this | |
1165 | means that r0 can't be used as either X2 or B2. */ | |
1166 | static pv_t | |
1167 | s390_addr (struct s390_prologue_data *data, | |
1168 | int d2, unsigned int x2, unsigned int b2) | |
1169 | { | |
1170 | pv_t result; | |
1171 | ||
1172 | result = pv_constant (d2); | |
1173 | if (x2) | |
1174 | result = pv_add (result, data->gpr[x2]); | |
1175 | if (b2) | |
1176 | result = pv_add (result, data->gpr[b2]); | |
1177 | ||
1178 | return result; | |
1179 | } | |
1180 | ||
1181 | /* Do a SIZE-byte store of VALUE to D2(X2,B2). */ | |
a8c99f38 | 1182 | static void |
3fc46200 UW |
1183 | s390_store (struct s390_prologue_data *data, |
1184 | int d2, unsigned int x2, unsigned int b2, CORE_ADDR size, | |
1185 | pv_t value) | |
4bc8c588 | 1186 | { |
3fc46200 | 1187 | pv_t addr = s390_addr (data, d2, x2, b2); |
ee1b3323 | 1188 | pv_t offset; |
121d8485 UW |
1189 | |
1190 | /* Check whether we are storing the backchain. */ | |
3fc46200 | 1191 | offset = pv_subtract (data->gpr[S390_SP_REGNUM - S390_R0_REGNUM], addr); |
121d8485 | 1192 | |
3fc46200 | 1193 | if (pv_is_constant (offset) && offset.k == 0) |
121d8485 | 1194 | if (size == data->gpr_size |
3fc46200 | 1195 | && pv_is_register_k (value, S390_SP_REGNUM, 0)) |
121d8485 UW |
1196 | { |
1197 | data->back_chain_saved_p = 1; | |
1198 | return; | |
1199 | } | |
1200 | ||
1201 | ||
1202 | /* Check whether we are storing a register into the stack. */ | |
ee1b3323 UW |
1203 | if (!pv_area_store_would_trash (data->stack, addr)) |
1204 | pv_area_store (data->stack, addr, size, value); | |
4bc8c588 | 1205 | |
a8c99f38 | 1206 | |
121d8485 UW |
1207 | /* Note: If this is some store we cannot identify, you might think we |
1208 | should forget our cached values, as any of those might have been hit. | |
1209 | ||
1210 | However, we make the assumption that the register save areas are only | |
1211 | ever stored to once in any given function, and we do recognize these | |
1212 | stores. Thus every store we cannot recognize does not hit our data. */ | |
4bc8c588 | 1213 | } |
4bc8c588 | 1214 | |
3fc46200 UW |
1215 | /* Do a SIZE-byte load from D2(X2,B2). */ |
1216 | static pv_t | |
1217 | s390_load (struct s390_prologue_data *data, | |
1218 | int d2, unsigned int x2, unsigned int b2, CORE_ADDR size) | |
34201ae3 | 1219 | |
4bc8c588 | 1220 | { |
3fc46200 | 1221 | pv_t addr = s390_addr (data, d2, x2, b2); |
4bc8c588 | 1222 | |
a8c99f38 JB |
1223 | /* If it's a load from an in-line constant pool, then we can |
1224 | simulate that, under the assumption that the code isn't | |
1225 | going to change between the time the processor actually | |
1226 | executed it creating the current frame, and the time when | |
1227 | we're analyzing the code to unwind past that frame. */ | |
3fc46200 | 1228 | if (pv_is_constant (addr)) |
4bc8c588 | 1229 | { |
0542c86d | 1230 | struct target_section *secp; |
3fc46200 | 1231 | secp = target_section_by_addr (¤t_target, addr.k); |
a8c99f38 | 1232 | if (secp != NULL |
34201ae3 | 1233 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
57e6060e | 1234 | secp->the_bfd_section) |
34201ae3 UW |
1235 | & SEC_READONLY)) |
1236 | return pv_constant (read_memory_integer (addr.k, size, | |
e17a4113 | 1237 | data->byte_order)); |
a8c99f38 | 1238 | } |
7666f43c | 1239 | |
121d8485 | 1240 | /* Check whether we are accessing one of our save slots. */ |
ee1b3323 UW |
1241 | return pv_area_fetch (data->stack, addr, size); |
1242 | } | |
121d8485 | 1243 | |
ee1b3323 UW |
1244 | /* Function for finding saved registers in a 'struct pv_area'; we pass |
1245 | this to pv_area_scan. | |
121d8485 | 1246 | |
ee1b3323 UW |
1247 | If VALUE is a saved register, ADDR says it was saved at a constant |
1248 | offset from the frame base, and SIZE indicates that the whole | |
1249 | register was saved, record its offset in the reg_offset table in | |
1250 | PROLOGUE_UNTYPED. */ | |
1251 | static void | |
c378eb4e MS |
1252 | s390_check_for_saved (void *data_untyped, pv_t addr, |
1253 | CORE_ADDR size, pv_t value) | |
ee1b3323 UW |
1254 | { |
1255 | struct s390_prologue_data *data = data_untyped; | |
1256 | int i, offset; | |
1257 | ||
1258 | if (!pv_is_register (addr, S390_SP_REGNUM)) | |
1259 | return; | |
1260 | ||
1261 | offset = 16 * data->gpr_size + 32 - addr.k; | |
4bc8c588 | 1262 | |
ee1b3323 UW |
1263 | /* If we are storing the original value of a register, we want to |
1264 | record the CFA offset. If the same register is stored multiple | |
1265 | times, the stack slot with the highest address counts. */ | |
34201ae3 | 1266 | |
ee1b3323 UW |
1267 | for (i = 0; i < S390_NUM_GPRS; i++) |
1268 | if (size == data->gpr_size | |
1269 | && pv_is_register_k (value, S390_R0_REGNUM + i, 0)) | |
1270 | if (data->gpr_slot[i] == 0 | |
1271 | || data->gpr_slot[i] > offset) | |
1272 | { | |
1273 | data->gpr_slot[i] = offset; | |
1274 | return; | |
1275 | } | |
1276 | ||
1277 | for (i = 0; i < S390_NUM_FPRS; i++) | |
1278 | if (size == data->fpr_size | |
1279 | && pv_is_register_k (value, S390_F0_REGNUM + i, 0)) | |
1280 | if (data->fpr_slot[i] == 0 | |
1281 | || data->fpr_slot[i] > offset) | |
1282 | { | |
1283 | data->fpr_slot[i] = offset; | |
1284 | return; | |
1285 | } | |
a8c99f38 | 1286 | } |
4bc8c588 | 1287 | |
a8c99f38 JB |
1288 | /* Analyze the prologue of the function starting at START_PC, |
1289 | continuing at most until CURRENT_PC. Initialize DATA to | |
1290 | hold all information we find out about the state of the registers | |
1291 | and stack slots. Return the address of the instruction after | |
1292 | the last one that changed the SP, FP, or back chain; or zero | |
1293 | on error. */ | |
1294 | static CORE_ADDR | |
1295 | s390_analyze_prologue (struct gdbarch *gdbarch, | |
1296 | CORE_ADDR start_pc, | |
1297 | CORE_ADDR current_pc, | |
1298 | struct s390_prologue_data *data) | |
4bc8c588 | 1299 | { |
a8c99f38 JB |
1300 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
1301 | ||
4bc8c588 | 1302 | /* Our return value: |
a8c99f38 | 1303 | The address of the instruction after the last one that changed |
34201ae3 | 1304 | the SP, FP, or back chain; zero if we got an error trying to |
a8c99f38 JB |
1305 | read memory. */ |
1306 | CORE_ADDR result = start_pc; | |
4bc8c588 | 1307 | |
4bc8c588 JB |
1308 | /* The current PC for our abstract interpretation. */ |
1309 | CORE_ADDR pc; | |
1310 | ||
1311 | /* The address of the next instruction after that. */ | |
1312 | CORE_ADDR next_pc; | |
34201ae3 | 1313 | |
4bc8c588 JB |
1314 | /* Set up everything's initial value. */ |
1315 | { | |
1316 | int i; | |
1317 | ||
55f960e1 | 1318 | data->stack = make_pv_area (S390_SP_REGNUM, gdbarch_addr_bit (gdbarch)); |
ee1b3323 | 1319 | |
a8c99f38 JB |
1320 | /* For the purpose of prologue tracking, we consider the GPR size to |
1321 | be equal to the ABI word size, even if it is actually larger | |
1322 | (i.e. when running a 32-bit binary under a 64-bit kernel). */ | |
1323 | data->gpr_size = word_size; | |
1324 | data->fpr_size = 8; | |
e17a4113 | 1325 | data->byte_order = gdbarch_byte_order (gdbarch); |
a8c99f38 | 1326 | |
4bc8c588 | 1327 | for (i = 0; i < S390_NUM_GPRS; i++) |
3fc46200 | 1328 | data->gpr[i] = pv_register (S390_R0_REGNUM + i, 0); |
4bc8c588 JB |
1329 | |
1330 | for (i = 0; i < S390_NUM_FPRS; i++) | |
3fc46200 | 1331 | data->fpr[i] = pv_register (S390_F0_REGNUM + i, 0); |
4bc8c588 | 1332 | |
121d8485 UW |
1333 | for (i = 0; i < S390_NUM_GPRS; i++) |
1334 | data->gpr_slot[i] = 0; | |
1335 | ||
1336 | for (i = 0; i < S390_NUM_FPRS; i++) | |
1337 | data->fpr_slot[i] = 0; | |
4bc8c588 | 1338 | |
121d8485 | 1339 | data->back_chain_saved_p = 0; |
4bc8c588 JB |
1340 | } |
1341 | ||
a8c99f38 JB |
1342 | /* Start interpreting instructions, until we hit the frame's |
1343 | current PC or the first branch instruction. */ | |
1344 | for (pc = start_pc; pc > 0 && pc < current_pc; pc = next_pc) | |
5769d3cd | 1345 | { |
4bc8c588 | 1346 | bfd_byte insn[S390_MAX_INSTR_SIZE]; |
a788de9b | 1347 | int insn_len = s390_readinstruction (insn, pc); |
4bc8c588 | 1348 | |
3fc46200 UW |
1349 | bfd_byte dummy[S390_MAX_INSTR_SIZE] = { 0 }; |
1350 | bfd_byte *insn32 = word_size == 4 ? insn : dummy; | |
1351 | bfd_byte *insn64 = word_size == 8 ? insn : dummy; | |
1352 | ||
4bc8c588 | 1353 | /* Fields for various kinds of instructions. */ |
a8c99f38 JB |
1354 | unsigned int b2, r1, r2, x2, r3; |
1355 | int i2, d2; | |
4bc8c588 | 1356 | |
121d8485 | 1357 | /* The values of SP and FP before this instruction, |
34201ae3 | 1358 | for detecting instructions that change them. */ |
3fc46200 | 1359 | pv_t pre_insn_sp, pre_insn_fp; |
121d8485 UW |
1360 | /* Likewise for the flag whether the back chain was saved. */ |
1361 | int pre_insn_back_chain_saved_p; | |
4bc8c588 JB |
1362 | |
1363 | /* If we got an error trying to read the instruction, report it. */ | |
1364 | if (insn_len < 0) | |
34201ae3 UW |
1365 | { |
1366 | result = 0; | |
1367 | break; | |
1368 | } | |
4bc8c588 JB |
1369 | |
1370 | next_pc = pc + insn_len; | |
1371 | ||
a8c99f38 JB |
1372 | pre_insn_sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
1373 | pre_insn_fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; | |
121d8485 | 1374 | pre_insn_back_chain_saved_p = data->back_chain_saved_p; |
4bc8c588 | 1375 | |
4bc8c588 | 1376 | |
3fc46200 UW |
1377 | /* LHI r1, i2 --- load halfword immediate. */ |
1378 | /* LGHI r1, i2 --- load halfword immediate (64-bit version). */ | |
1379 | /* LGFI r1, i2 --- load fullword immediate. */ | |
1380 | if (is_ri (insn32, op1_lhi, op2_lhi, &r1, &i2) | |
34201ae3 UW |
1381 | || is_ri (insn64, op1_lghi, op2_lghi, &r1, &i2) |
1382 | || is_ril (insn, op1_lgfi, op2_lgfi, &r1, &i2)) | |
3fc46200 UW |
1383 | data->gpr[r1] = pv_constant (i2); |
1384 | ||
1385 | /* LR r1, r2 --- load from register. */ | |
1386 | /* LGR r1, r2 --- load from register (64-bit version). */ | |
1387 | else if (is_rr (insn32, op_lr, &r1, &r2) | |
1388 | || is_rre (insn64, op_lgr, &r1, &r2)) | |
1389 | data->gpr[r1] = data->gpr[r2]; | |
1390 | ||
1391 | /* L r1, d2(x2, b2) --- load. */ | |
1392 | /* LY r1, d2(x2, b2) --- load (long-displacement version). */ | |
1393 | /* LG r1, d2(x2, b2) --- load (64-bit version). */ | |
1394 | else if (is_rx (insn32, op_l, &r1, &d2, &x2, &b2) | |
1395 | || is_rxy (insn32, op1_ly, op2_ly, &r1, &d2, &x2, &b2) | |
1396 | || is_rxy (insn64, op1_lg, op2_lg, &r1, &d2, &x2, &b2)) | |
1397 | data->gpr[r1] = s390_load (data, d2, x2, b2, data->gpr_size); | |
1398 | ||
1399 | /* ST r1, d2(x2, b2) --- store. */ | |
1400 | /* STY r1, d2(x2, b2) --- store (long-displacement version). */ | |
1401 | /* STG r1, d2(x2, b2) --- store (64-bit version). */ | |
1402 | else if (is_rx (insn32, op_st, &r1, &d2, &x2, &b2) | |
1403 | || is_rxy (insn32, op1_sty, op2_sty, &r1, &d2, &x2, &b2) | |
1404 | || is_rxy (insn64, op1_stg, op2_stg, &r1, &d2, &x2, &b2)) | |
1405 | s390_store (data, d2, x2, b2, data->gpr_size, data->gpr[r1]); | |
1406 | ||
1407 | /* STD r1, d2(x2,b2) --- store floating-point register. */ | |
4bc8c588 | 1408 | else if (is_rx (insn, op_std, &r1, &d2, &x2, &b2)) |
3fc46200 UW |
1409 | s390_store (data, d2, x2, b2, data->fpr_size, data->fpr[r1]); |
1410 | ||
1411 | /* STM r1, r3, d2(b2) --- store multiple. */ | |
c378eb4e MS |
1412 | /* STMY r1, r3, d2(b2) --- store multiple (long-displacement |
1413 | version). */ | |
3fc46200 UW |
1414 | /* STMG r1, r3, d2(b2) --- store multiple (64-bit version). */ |
1415 | else if (is_rs (insn32, op_stm, &r1, &r3, &d2, &b2) | |
1416 | || is_rsy (insn32, op1_stmy, op2_stmy, &r1, &r3, &d2, &b2) | |
1417 | || is_rsy (insn64, op1_stmg, op2_stmg, &r1, &r3, &d2, &b2)) | |
34201ae3 UW |
1418 | { |
1419 | for (; r1 <= r3; r1++, d2 += data->gpr_size) | |
3fc46200 | 1420 | s390_store (data, d2, 0, b2, data->gpr_size, data->gpr[r1]); |
34201ae3 | 1421 | } |
4bc8c588 | 1422 | |
3fc46200 UW |
1423 | /* AHI r1, i2 --- add halfword immediate. */ |
1424 | /* AGHI r1, i2 --- add halfword immediate (64-bit version). */ | |
1425 | /* AFI r1, i2 --- add fullword immediate. */ | |
1426 | /* AGFI r1, i2 --- add fullword immediate (64-bit version). */ | |
1427 | else if (is_ri (insn32, op1_ahi, op2_ahi, &r1, &i2) | |
1428 | || is_ri (insn64, op1_aghi, op2_aghi, &r1, &i2) | |
1429 | || is_ril (insn32, op1_afi, op2_afi, &r1, &i2) | |
1430 | || is_ril (insn64, op1_agfi, op2_agfi, &r1, &i2)) | |
1431 | data->gpr[r1] = pv_add_constant (data->gpr[r1], i2); | |
1432 | ||
1433 | /* ALFI r1, i2 --- add logical immediate. */ | |
1434 | /* ALGFI r1, i2 --- add logical immediate (64-bit version). */ | |
1435 | else if (is_ril (insn32, op1_alfi, op2_alfi, &r1, &i2) | |
1436 | || is_ril (insn64, op1_algfi, op2_algfi, &r1, &i2)) | |
1437 | data->gpr[r1] = pv_add_constant (data->gpr[r1], | |
1438 | (CORE_ADDR)i2 & 0xffffffff); | |
1439 | ||
1440 | /* AR r1, r2 -- add register. */ | |
1441 | /* AGR r1, r2 -- add register (64-bit version). */ | |
1442 | else if (is_rr (insn32, op_ar, &r1, &r2) | |
1443 | || is_rre (insn64, op_agr, &r1, &r2)) | |
1444 | data->gpr[r1] = pv_add (data->gpr[r1], data->gpr[r2]); | |
1445 | ||
1446 | /* A r1, d2(x2, b2) -- add. */ | |
1447 | /* AY r1, d2(x2, b2) -- add (long-displacement version). */ | |
1448 | /* AG r1, d2(x2, b2) -- add (64-bit version). */ | |
1449 | else if (is_rx (insn32, op_a, &r1, &d2, &x2, &b2) | |
1450 | || is_rxy (insn32, op1_ay, op2_ay, &r1, &d2, &x2, &b2) | |
1451 | || is_rxy (insn64, op1_ag, op2_ag, &r1, &d2, &x2, &b2)) | |
1452 | data->gpr[r1] = pv_add (data->gpr[r1], | |
1453 | s390_load (data, d2, x2, b2, data->gpr_size)); | |
1454 | ||
1455 | /* SLFI r1, i2 --- subtract logical immediate. */ | |
1456 | /* SLGFI r1, i2 --- subtract logical immediate (64-bit version). */ | |
1457 | else if (is_ril (insn32, op1_slfi, op2_slfi, &r1, &i2) | |
1458 | || is_ril (insn64, op1_slgfi, op2_slgfi, &r1, &i2)) | |
1459 | data->gpr[r1] = pv_add_constant (data->gpr[r1], | |
1460 | -((CORE_ADDR)i2 & 0xffffffff)); | |
1461 | ||
1462 | /* SR r1, r2 -- subtract register. */ | |
1463 | /* SGR r1, r2 -- subtract register (64-bit version). */ | |
1464 | else if (is_rr (insn32, op_sr, &r1, &r2) | |
1465 | || is_rre (insn64, op_sgr, &r1, &r2)) | |
1466 | data->gpr[r1] = pv_subtract (data->gpr[r1], data->gpr[r2]); | |
1467 | ||
1468 | /* S r1, d2(x2, b2) -- subtract. */ | |
1469 | /* SY r1, d2(x2, b2) -- subtract (long-displacement version). */ | |
1470 | /* SG r1, d2(x2, b2) -- subtract (64-bit version). */ | |
1471 | else if (is_rx (insn32, op_s, &r1, &d2, &x2, &b2) | |
1472 | || is_rxy (insn32, op1_sy, op2_sy, &r1, &d2, &x2, &b2) | |
1473 | || is_rxy (insn64, op1_sg, op2_sg, &r1, &d2, &x2, &b2)) | |
1474 | data->gpr[r1] = pv_subtract (data->gpr[r1], | |
1475 | s390_load (data, d2, x2, b2, data->gpr_size)); | |
1476 | ||
1477 | /* LA r1, d2(x2, b2) --- load address. */ | |
1478 | /* LAY r1, d2(x2, b2) --- load address (long-displacement version). */ | |
1479 | else if (is_rx (insn, op_la, &r1, &d2, &x2, &b2) | |
34201ae3 | 1480 | || is_rxy (insn, op1_lay, op2_lay, &r1, &d2, &x2, &b2)) |
3fc46200 UW |
1481 | data->gpr[r1] = s390_addr (data, d2, x2, b2); |
1482 | ||
1483 | /* LARL r1, i2 --- load address relative long. */ | |
a8c99f38 | 1484 | else if (is_ril (insn, op1_larl, op2_larl, &r1, &i2)) |
3fc46200 | 1485 | data->gpr[r1] = pv_constant (pc + i2 * 2); |
a8c99f38 | 1486 | |
3fc46200 | 1487 | /* BASR r1, 0 --- branch and save. |
34201ae3 | 1488 | Since r2 is zero, this saves the PC in r1, but doesn't branch. */ |
a8c99f38 | 1489 | else if (is_rr (insn, op_basr, &r1, &r2) |
34201ae3 | 1490 | && r2 == 0) |
3fc46200 | 1491 | data->gpr[r1] = pv_constant (next_pc); |
a8c99f38 | 1492 | |
3fc46200 | 1493 | /* BRAS r1, i2 --- branch relative and save. */ |
a8c99f38 | 1494 | else if (is_ri (insn, op1_bras, op2_bras, &r1, &i2)) |
34201ae3 UW |
1495 | { |
1496 | data->gpr[r1] = pv_constant (next_pc); | |
1497 | next_pc = pc + i2 * 2; | |
4bc8c588 | 1498 | |
34201ae3 UW |
1499 | /* We'd better not interpret any backward branches. We'll |
1500 | never terminate. */ | |
1501 | if (next_pc <= pc) | |
1502 | break; | |
1503 | } | |
4bc8c588 | 1504 | |
a8c99f38 JB |
1505 | /* Terminate search when hitting any other branch instruction. */ |
1506 | else if (is_rr (insn, op_basr, &r1, &r2) | |
1507 | || is_rx (insn, op_bas, &r1, &d2, &x2, &b2) | |
1508 | || is_rr (insn, op_bcr, &r1, &r2) | |
1509 | || is_rx (insn, op_bc, &r1, &d2, &x2, &b2) | |
1510 | || is_ri (insn, op1_brc, op2_brc, &r1, &i2) | |
1511 | || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2) | |
1512 | || is_ril (insn, op1_brasl, op2_brasl, &r2, &i2)) | |
1513 | break; | |
1514 | ||
4bc8c588 | 1515 | else |
d4fb63e1 TT |
1516 | { |
1517 | /* An instruction we don't know how to simulate. The only | |
1518 | safe thing to do would be to set every value we're tracking | |
1519 | to 'unknown'. Instead, we'll be optimistic: we assume that | |
1520 | we *can* interpret every instruction that the compiler uses | |
1521 | to manipulate any of the data we're interested in here -- | |
1522 | then we can just ignore anything else. */ | |
1523 | } | |
4bc8c588 JB |
1524 | |
1525 | /* Record the address after the last instruction that changed | |
34201ae3 UW |
1526 | the FP, SP, or backlink. Ignore instructions that changed |
1527 | them back to their original values --- those are probably | |
1528 | restore instructions. (The back chain is never restored, | |
1529 | just popped.) */ | |
4bc8c588 | 1530 | { |
34201ae3 UW |
1531 | pv_t sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
1532 | pv_t fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; | |
1533 | ||
1534 | if ((! pv_is_identical (pre_insn_sp, sp) | |
1535 | && ! pv_is_register_k (sp, S390_SP_REGNUM, 0) | |
3fc46200 | 1536 | && sp.kind != pvk_unknown) |
34201ae3 UW |
1537 | || (! pv_is_identical (pre_insn_fp, fp) |
1538 | && ! pv_is_register_k (fp, S390_FRAME_REGNUM, 0) | |
3fc46200 | 1539 | && fp.kind != pvk_unknown) |
34201ae3 UW |
1540 | || pre_insn_back_chain_saved_p != data->back_chain_saved_p) |
1541 | result = next_pc; | |
4bc8c588 | 1542 | } |
5769d3cd | 1543 | } |
4bc8c588 | 1544 | |
ee1b3323 UW |
1545 | /* Record where all the registers were saved. */ |
1546 | pv_area_scan (data->stack, s390_check_for_saved, data); | |
1547 | ||
1548 | free_pv_area (data->stack); | |
1549 | data->stack = NULL; | |
1550 | ||
4bc8c588 | 1551 | return result; |
5769d3cd AC |
1552 | } |
1553 | ||
34201ae3 | 1554 | /* Advance PC across any function entry prologue instructions to reach |
a8c99f38 JB |
1555 | some "real" code. */ |
1556 | static CORE_ADDR | |
6093d2eb | 1557 | s390_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
a8c99f38 JB |
1558 | { |
1559 | struct s390_prologue_data data; | |
1560 | CORE_ADDR skip_pc; | |
6093d2eb | 1561 | skip_pc = s390_analyze_prologue (gdbarch, pc, (CORE_ADDR)-1, &data); |
a8c99f38 JB |
1562 | return skip_pc ? skip_pc : pc; |
1563 | } | |
1564 | ||
d0f54f9d JB |
1565 | /* Return true if we are in the functin's epilogue, i.e. after the |
1566 | instruction that destroyed the function's stack frame. */ | |
1567 | static int | |
1568 | s390_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1569 | { | |
1570 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
1571 | ||
1572 | /* In frameless functions, there's not frame to destroy and thus | |
1573 | we don't care about the epilogue. | |
1574 | ||
1575 | In functions with frame, the epilogue sequence is a pair of | |
1576 | a LM-type instruction that restores (amongst others) the | |
1577 | return register %r14 and the stack pointer %r15, followed | |
1578 | by a branch 'br %r14' --or equivalent-- that effects the | |
1579 | actual return. | |
1580 | ||
1581 | In that situation, this function needs to return 'true' in | |
1582 | exactly one case: when pc points to that branch instruction. | |
1583 | ||
1584 | Thus we try to disassemble the one instructions immediately | |
177b42fe | 1585 | preceding pc and check whether it is an LM-type instruction |
d0f54f9d JB |
1586 | modifying the stack pointer. |
1587 | ||
1588 | Note that disassembling backwards is not reliable, so there | |
1589 | is a slight chance of false positives here ... */ | |
1590 | ||
1591 | bfd_byte insn[6]; | |
1592 | unsigned int r1, r3, b2; | |
1593 | int d2; | |
1594 | ||
1595 | if (word_size == 4 | |
8defab1a | 1596 | && !target_read_memory (pc - 4, insn, 4) |
d0f54f9d JB |
1597 | && is_rs (insn, op_lm, &r1, &r3, &d2, &b2) |
1598 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) | |
1599 | return 1; | |
1600 | ||
a8c99f38 | 1601 | if (word_size == 4 |
8defab1a | 1602 | && !target_read_memory (pc - 6, insn, 6) |
a8c99f38 JB |
1603 | && is_rsy (insn, op1_lmy, op2_lmy, &r1, &r3, &d2, &b2) |
1604 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) | |
1605 | return 1; | |
1606 | ||
d0f54f9d | 1607 | if (word_size == 8 |
8defab1a | 1608 | && !target_read_memory (pc - 6, insn, 6) |
a8c99f38 | 1609 | && is_rsy (insn, op1_lmg, op2_lmg, &r1, &r3, &d2, &b2) |
d0f54f9d JB |
1610 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) |
1611 | return 1; | |
1612 | ||
1613 | return 0; | |
1614 | } | |
5769d3cd | 1615 | |
1db4e8a0 UW |
1616 | /* Displaced stepping. */ |
1617 | ||
1618 | /* Fix up the state of registers and memory after having single-stepped | |
1619 | a displaced instruction. */ | |
1620 | static void | |
1621 | s390_displaced_step_fixup (struct gdbarch *gdbarch, | |
1622 | struct displaced_step_closure *closure, | |
1623 | CORE_ADDR from, CORE_ADDR to, | |
1624 | struct regcache *regs) | |
1625 | { | |
1626 | /* Since we use simple_displaced_step_copy_insn, our closure is a | |
1627 | copy of the instruction. */ | |
1628 | gdb_byte *insn = (gdb_byte *) closure; | |
1629 | static int s390_instrlen[] = { 2, 4, 4, 6 }; | |
1630 | int insnlen = s390_instrlen[insn[0] >> 6]; | |
1631 | ||
1632 | /* Fields for various kinds of instructions. */ | |
1633 | unsigned int b2, r1, r2, x2, r3; | |
1634 | int i2, d2; | |
1635 | ||
1636 | /* Get current PC and addressing mode bit. */ | |
1637 | CORE_ADDR pc = regcache_read_pc (regs); | |
beaabab2 | 1638 | ULONGEST amode = 0; |
1db4e8a0 UW |
1639 | |
1640 | if (register_size (gdbarch, S390_PSWA_REGNUM) == 4) | |
1641 | { | |
1642 | regcache_cooked_read_unsigned (regs, S390_PSWA_REGNUM, &amode); | |
1643 | amode &= 0x80000000; | |
1644 | } | |
1645 | ||
1646 | if (debug_displaced) | |
1647 | fprintf_unfiltered (gdb_stdlog, | |
0161e4b9 | 1648 | "displaced: (s390) fixup (%s, %s) pc %s len %d amode 0x%x\n", |
1db4e8a0 | 1649 | paddress (gdbarch, from), paddress (gdbarch, to), |
0161e4b9 | 1650 | paddress (gdbarch, pc), insnlen, (int) amode); |
1db4e8a0 UW |
1651 | |
1652 | /* Handle absolute branch and save instructions. */ | |
1653 | if (is_rr (insn, op_basr, &r1, &r2) | |
1654 | || is_rx (insn, op_bas, &r1, &d2, &x2, &b2)) | |
1655 | { | |
1656 | /* Recompute saved return address in R1. */ | |
1657 | regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1, | |
1658 | amode | (from + insnlen)); | |
1659 | } | |
1660 | ||
1661 | /* Handle absolute branch instructions. */ | |
1662 | else if (is_rr (insn, op_bcr, &r1, &r2) | |
1663 | || is_rx (insn, op_bc, &r1, &d2, &x2, &b2) | |
1664 | || is_rr (insn, op_bctr, &r1, &r2) | |
1665 | || is_rre (insn, op_bctgr, &r1, &r2) | |
1666 | || is_rx (insn, op_bct, &r1, &d2, &x2, &b2) | |
1667 | || is_rxy (insn, op1_bctg, op2_brctg, &r1, &d2, &x2, &b2) | |
1668 | || is_rs (insn, op_bxh, &r1, &r3, &d2, &b2) | |
1669 | || is_rsy (insn, op1_bxhg, op2_bxhg, &r1, &r3, &d2, &b2) | |
1670 | || is_rs (insn, op_bxle, &r1, &r3, &d2, &b2) | |
1671 | || is_rsy (insn, op1_bxleg, op2_bxleg, &r1, &r3, &d2, &b2)) | |
1672 | { | |
1673 | /* Update PC iff branch was *not* taken. */ | |
1674 | if (pc == to + insnlen) | |
1675 | regcache_write_pc (regs, from + insnlen); | |
1676 | } | |
1677 | ||
1678 | /* Handle PC-relative branch and save instructions. */ | |
1679 | else if (is_ri (insn, op1_bras, op2_bras, &r1, &i2) | |
34201ae3 | 1680 | || is_ril (insn, op1_brasl, op2_brasl, &r1, &i2)) |
1db4e8a0 UW |
1681 | { |
1682 | /* Update PC. */ | |
1683 | regcache_write_pc (regs, pc - to + from); | |
1684 | /* Recompute saved return address in R1. */ | |
1685 | regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1, | |
1686 | amode | (from + insnlen)); | |
1687 | } | |
1688 | ||
1689 | /* Handle PC-relative branch instructions. */ | |
1690 | else if (is_ri (insn, op1_brc, op2_brc, &r1, &i2) | |
1691 | || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2) | |
1692 | || is_ri (insn, op1_brct, op2_brct, &r1, &i2) | |
1693 | || is_ri (insn, op1_brctg, op2_brctg, &r1, &i2) | |
1694 | || is_rsi (insn, op_brxh, &r1, &r3, &i2) | |
1695 | || is_rie (insn, op1_brxhg, op2_brxhg, &r1, &r3, &i2) | |
1696 | || is_rsi (insn, op_brxle, &r1, &r3, &i2) | |
1697 | || is_rie (insn, op1_brxlg, op2_brxlg, &r1, &r3, &i2)) | |
1698 | { | |
1699 | /* Update PC. */ | |
1700 | regcache_write_pc (regs, pc - to + from); | |
1701 | } | |
1702 | ||
1703 | /* Handle LOAD ADDRESS RELATIVE LONG. */ | |
1704 | else if (is_ril (insn, op1_larl, op2_larl, &r1, &i2)) | |
1705 | { | |
0161e4b9 UW |
1706 | /* Update PC. */ |
1707 | regcache_write_pc (regs, from + insnlen); | |
34201ae3 | 1708 | /* Recompute output address in R1. */ |
1db4e8a0 | 1709 | regcache_cooked_write_unsigned (regs, S390_R0_REGNUM + r1, |
0161e4b9 | 1710 | amode | (from + i2 * 2)); |
1db4e8a0 UW |
1711 | } |
1712 | ||
1713 | /* If we executed a breakpoint instruction, point PC right back at it. */ | |
1714 | else if (insn[0] == 0x0 && insn[1] == 0x1) | |
1715 | regcache_write_pc (regs, from); | |
1716 | ||
1717 | /* For any other insn, PC points right after the original instruction. */ | |
1718 | else | |
1719 | regcache_write_pc (regs, from + insnlen); | |
0161e4b9 UW |
1720 | |
1721 | if (debug_displaced) | |
1722 | fprintf_unfiltered (gdb_stdlog, | |
1723 | "displaced: (s390) pc is now %s\n", | |
1724 | paddress (gdbarch, regcache_read_pc (regs))); | |
1db4e8a0 | 1725 | } |
a8c99f38 | 1726 | |
d6db1fab UW |
1727 | |
1728 | /* Helper routine to unwind pseudo registers. */ | |
1729 | ||
1730 | static struct value * | |
1731 | s390_unwind_pseudo_register (struct frame_info *this_frame, int regnum) | |
1732 | { | |
1733 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
1734 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
1735 | struct type *type = register_type (gdbarch, regnum); | |
1736 | ||
1737 | /* Unwind PC via PSW address. */ | |
1738 | if (regnum == tdep->pc_regnum) | |
1739 | { | |
1740 | struct value *val; | |
1741 | ||
1742 | val = frame_unwind_register_value (this_frame, S390_PSWA_REGNUM); | |
1743 | if (!value_optimized_out (val)) | |
1744 | { | |
1745 | LONGEST pswa = value_as_long (val); | |
1746 | ||
1747 | if (TYPE_LENGTH (type) == 4) | |
1748 | return value_from_pointer (type, pswa & 0x7fffffff); | |
1749 | else | |
1750 | return value_from_pointer (type, pswa); | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | /* Unwind CC via PSW mask. */ | |
1755 | if (regnum == tdep->cc_regnum) | |
1756 | { | |
1757 | struct value *val; | |
1758 | ||
1759 | val = frame_unwind_register_value (this_frame, S390_PSWM_REGNUM); | |
1760 | if (!value_optimized_out (val)) | |
1761 | { | |
1762 | LONGEST pswm = value_as_long (val); | |
1763 | ||
1764 | if (TYPE_LENGTH (type) == 4) | |
1765 | return value_from_longest (type, (pswm >> 12) & 3); | |
1766 | else | |
1767 | return value_from_longest (type, (pswm >> 44) & 3); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* Unwind full GPRs to show at least the lower halves (as the | |
1772 | upper halves are undefined). */ | |
2ccd1468 | 1773 | if (regnum_is_gpr_full (tdep, regnum)) |
d6db1fab UW |
1774 | { |
1775 | int reg = regnum - tdep->gpr_full_regnum; | |
1776 | struct value *val; | |
1777 | ||
1778 | val = frame_unwind_register_value (this_frame, S390_R0_REGNUM + reg); | |
1779 | if (!value_optimized_out (val)) | |
1780 | return value_cast (type, val); | |
1781 | } | |
1782 | ||
1783 | return allocate_optimized_out_value (type); | |
1784 | } | |
1785 | ||
1786 | static struct value * | |
1787 | s390_trad_frame_prev_register (struct frame_info *this_frame, | |
1788 | struct trad_frame_saved_reg saved_regs[], | |
1789 | int regnum) | |
1790 | { | |
1791 | if (regnum < S390_NUM_REGS) | |
1792 | return trad_frame_get_prev_register (this_frame, saved_regs, regnum); | |
1793 | else | |
1794 | return s390_unwind_pseudo_register (this_frame, regnum); | |
1795 | } | |
1796 | ||
1797 | ||
a8c99f38 JB |
1798 | /* Normal stack frames. */ |
1799 | ||
1800 | struct s390_unwind_cache { | |
1801 | ||
1802 | CORE_ADDR func; | |
1803 | CORE_ADDR frame_base; | |
1804 | CORE_ADDR local_base; | |
1805 | ||
1806 | struct trad_frame_saved_reg *saved_regs; | |
1807 | }; | |
1808 | ||
a78f21af | 1809 | static int |
f089c433 | 1810 | s390_prologue_frame_unwind_cache (struct frame_info *this_frame, |
a8c99f38 | 1811 | struct s390_unwind_cache *info) |
5769d3cd | 1812 | { |
f089c433 | 1813 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
a8c99f38 JB |
1814 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
1815 | struct s390_prologue_data data; | |
3fc46200 UW |
1816 | pv_t *fp = &data.gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; |
1817 | pv_t *sp = &data.gpr[S390_SP_REGNUM - S390_R0_REGNUM]; | |
121d8485 UW |
1818 | int i; |
1819 | CORE_ADDR cfa; | |
a8c99f38 JB |
1820 | CORE_ADDR func; |
1821 | CORE_ADDR result; | |
1822 | ULONGEST reg; | |
1823 | CORE_ADDR prev_sp; | |
1824 | int frame_pointer; | |
1825 | int size; | |
edb3359d | 1826 | struct frame_info *next_frame; |
a8c99f38 JB |
1827 | |
1828 | /* Try to find the function start address. If we can't find it, we don't | |
1829 | bother searching for it -- with modern compilers this would be mostly | |
1830 | pointless anyway. Trust that we'll either have valid DWARF-2 CFI data | |
1831 | or else a valid backchain ... */ | |
f089c433 | 1832 | func = get_frame_func (this_frame); |
a8c99f38 JB |
1833 | if (!func) |
1834 | return 0; | |
5769d3cd | 1835 | |
a8c99f38 JB |
1836 | /* Try to analyze the prologue. */ |
1837 | result = s390_analyze_prologue (gdbarch, func, | |
f089c433 | 1838 | get_frame_pc (this_frame), &data); |
a8c99f38 | 1839 | if (!result) |
5769d3cd | 1840 | return 0; |
5769d3cd | 1841 | |
a8c99f38 | 1842 | /* If this was successful, we should have found the instruction that |
34201ae3 | 1843 | sets the stack pointer register to the previous value of the stack |
a8c99f38 | 1844 | pointer minus the frame size. */ |
3fc46200 | 1845 | if (!pv_is_register (*sp, S390_SP_REGNUM)) |
5769d3cd | 1846 | return 0; |
a8c99f38 | 1847 | |
34201ae3 | 1848 | /* A frame size of zero at this point can mean either a real |
a8c99f38 | 1849 | frameless function, or else a failure to find the prologue. |
34201ae3 | 1850 | Perform some sanity checks to verify we really have a |
a8c99f38 JB |
1851 | frameless function. */ |
1852 | if (sp->k == 0) | |
5769d3cd | 1853 | { |
34201ae3 UW |
1854 | /* If the next frame is a NORMAL_FRAME, this frame *cannot* have frame |
1855 | size zero. This is only possible if the next frame is a sentinel | |
a8c99f38 | 1856 | frame, a dummy frame, or a signal trampoline frame. */ |
0e100dab AC |
1857 | /* FIXME: cagney/2004-05-01: This sanity check shouldn't be |
1858 | needed, instead the code should simpliy rely on its | |
1859 | analysis. */ | |
edb3359d DJ |
1860 | next_frame = get_next_frame (this_frame); |
1861 | while (next_frame && get_frame_type (next_frame) == INLINE_FRAME) | |
1862 | next_frame = get_next_frame (next_frame); | |
1863 | if (next_frame | |
f089c433 | 1864 | && get_frame_type (get_next_frame (this_frame)) == NORMAL_FRAME) |
5769d3cd | 1865 | return 0; |
5769d3cd | 1866 | |
a8c99f38 JB |
1867 | /* If we really have a frameless function, %r14 must be valid |
1868 | -- in particular, it must point to a different function. */ | |
f089c433 | 1869 | reg = get_frame_register_unsigned (this_frame, S390_RETADDR_REGNUM); |
a8c99f38 JB |
1870 | reg = gdbarch_addr_bits_remove (gdbarch, reg) - 1; |
1871 | if (get_pc_function_start (reg) == func) | |
5769d3cd | 1872 | { |
a8c99f38 JB |
1873 | /* However, there is one case where it *is* valid for %r14 |
1874 | to point to the same function -- if this is a recursive | |
1875 | call, and we have stopped in the prologue *before* the | |
1876 | stack frame was allocated. | |
1877 | ||
1878 | Recognize this case by looking ahead a bit ... */ | |
5769d3cd | 1879 | |
a8c99f38 | 1880 | struct s390_prologue_data data2; |
3fc46200 | 1881 | pv_t *sp = &data2.gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
a8c99f38 JB |
1882 | |
1883 | if (!(s390_analyze_prologue (gdbarch, func, (CORE_ADDR)-1, &data2) | |
34201ae3 UW |
1884 | && pv_is_register (*sp, S390_SP_REGNUM) |
1885 | && sp->k != 0)) | |
a8c99f38 | 1886 | return 0; |
5769d3cd | 1887 | } |
5769d3cd | 1888 | } |
5769d3cd AC |
1889 | |
1890 | ||
a8c99f38 JB |
1891 | /* OK, we've found valid prologue data. */ |
1892 | size = -sp->k; | |
5769d3cd | 1893 | |
a8c99f38 JB |
1894 | /* If the frame pointer originally also holds the same value |
1895 | as the stack pointer, we're probably using it. If it holds | |
1896 | some other value -- even a constant offset -- it is most | |
1897 | likely used as temp register. */ | |
3fc46200 | 1898 | if (pv_is_identical (*sp, *fp)) |
a8c99f38 JB |
1899 | frame_pointer = S390_FRAME_REGNUM; |
1900 | else | |
1901 | frame_pointer = S390_SP_REGNUM; | |
1902 | ||
34201ae3 UW |
1903 | /* If we've detected a function with stack frame, we'll still have to |
1904 | treat it as frameless if we're currently within the function epilog | |
c378eb4e | 1905 | code at a point where the frame pointer has already been restored. |
a8c99f38 | 1906 | This can only happen in an innermost frame. */ |
0e100dab AC |
1907 | /* FIXME: cagney/2004-05-01: This sanity check shouldn't be needed, |
1908 | instead the code should simpliy rely on its analysis. */ | |
edb3359d DJ |
1909 | next_frame = get_next_frame (this_frame); |
1910 | while (next_frame && get_frame_type (next_frame) == INLINE_FRAME) | |
1911 | next_frame = get_next_frame (next_frame); | |
f089c433 | 1912 | if (size > 0 |
edb3359d | 1913 | && (next_frame == NULL |
f089c433 | 1914 | || get_frame_type (get_next_frame (this_frame)) != NORMAL_FRAME)) |
5769d3cd | 1915 | { |
a8c99f38 JB |
1916 | /* See the comment in s390_in_function_epilogue_p on why this is |
1917 | not completely reliable ... */ | |
f089c433 | 1918 | if (s390_in_function_epilogue_p (gdbarch, get_frame_pc (this_frame))) |
5769d3cd | 1919 | { |
a8c99f38 JB |
1920 | memset (&data, 0, sizeof (data)); |
1921 | size = 0; | |
1922 | frame_pointer = S390_SP_REGNUM; | |
5769d3cd | 1923 | } |
5769d3cd | 1924 | } |
5769d3cd | 1925 | |
a8c99f38 JB |
1926 | /* Once we know the frame register and the frame size, we can unwind |
1927 | the current value of the frame register from the next frame, and | |
34201ae3 | 1928 | add back the frame size to arrive that the previous frame's |
a8c99f38 | 1929 | stack pointer value. */ |
f089c433 | 1930 | prev_sp = get_frame_register_unsigned (this_frame, frame_pointer) + size; |
121d8485 | 1931 | cfa = prev_sp + 16*word_size + 32; |
5769d3cd | 1932 | |
7803799a UW |
1933 | /* Set up ABI call-saved/call-clobbered registers. */ |
1934 | for (i = 0; i < S390_NUM_REGS; i++) | |
1935 | if (!s390_register_call_saved (gdbarch, i)) | |
1936 | trad_frame_set_unknown (info->saved_regs, i); | |
1937 | ||
1938 | /* CC is always call-clobbered. */ | |
d6db1fab | 1939 | trad_frame_set_unknown (info->saved_regs, S390_PSWM_REGNUM); |
7803799a | 1940 | |
121d8485 UW |
1941 | /* Record the addresses of all register spill slots the prologue parser |
1942 | has recognized. Consider only registers defined as call-saved by the | |
1943 | ABI; for call-clobbered registers the parser may have recognized | |
1944 | spurious stores. */ | |
5769d3cd | 1945 | |
7803799a UW |
1946 | for (i = 0; i < 16; i++) |
1947 | if (s390_register_call_saved (gdbarch, S390_R0_REGNUM + i) | |
1948 | && data.gpr_slot[i] != 0) | |
121d8485 | 1949 | info->saved_regs[S390_R0_REGNUM + i].addr = cfa - data.gpr_slot[i]; |
a8c99f38 | 1950 | |
7803799a UW |
1951 | for (i = 0; i < 16; i++) |
1952 | if (s390_register_call_saved (gdbarch, S390_F0_REGNUM + i) | |
1953 | && data.fpr_slot[i] != 0) | |
1954 | info->saved_regs[S390_F0_REGNUM + i].addr = cfa - data.fpr_slot[i]; | |
a8c99f38 JB |
1955 | |
1956 | /* Function return will set PC to %r14. */ | |
d6db1fab | 1957 | info->saved_regs[S390_PSWA_REGNUM] = info->saved_regs[S390_RETADDR_REGNUM]; |
a8c99f38 JB |
1958 | |
1959 | /* In frameless functions, we unwind simply by moving the return | |
1960 | address to the PC. However, if we actually stored to the | |
1961 | save area, use that -- we might only think the function frameless | |
1962 | because we're in the middle of the prologue ... */ | |
1963 | if (size == 0 | |
d6db1fab | 1964 | && !trad_frame_addr_p (info->saved_regs, S390_PSWA_REGNUM)) |
a8c99f38 | 1965 | { |
d6db1fab | 1966 | info->saved_regs[S390_PSWA_REGNUM].realreg = S390_RETADDR_REGNUM; |
5769d3cd | 1967 | } |
a8c99f38 JB |
1968 | |
1969 | /* Another sanity check: unless this is a frameless function, | |
1970 | we should have found spill slots for SP and PC. | |
1971 | If not, we cannot unwind further -- this happens e.g. in | |
1972 | libc's thread_start routine. */ | |
1973 | if (size > 0) | |
5769d3cd | 1974 | { |
a8c99f38 | 1975 | if (!trad_frame_addr_p (info->saved_regs, S390_SP_REGNUM) |
d6db1fab | 1976 | || !trad_frame_addr_p (info->saved_regs, S390_PSWA_REGNUM)) |
a8c99f38 | 1977 | prev_sp = -1; |
5769d3cd | 1978 | } |
a8c99f38 JB |
1979 | |
1980 | /* We use the current value of the frame register as local_base, | |
1981 | and the top of the register save area as frame_base. */ | |
1982 | if (prev_sp != -1) | |
1983 | { | |
1984 | info->frame_base = prev_sp + 16*word_size + 32; | |
1985 | info->local_base = prev_sp - size; | |
1986 | } | |
1987 | ||
1988 | info->func = func; | |
1989 | return 1; | |
5769d3cd AC |
1990 | } |
1991 | ||
a78f21af | 1992 | static void |
f089c433 | 1993 | s390_backchain_frame_unwind_cache (struct frame_info *this_frame, |
a8c99f38 | 1994 | struct s390_unwind_cache *info) |
5769d3cd | 1995 | { |
f089c433 | 1996 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
a8c99f38 | 1997 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
e17a4113 | 1998 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
a8c99f38 JB |
1999 | CORE_ADDR backchain; |
2000 | ULONGEST reg; | |
2001 | LONGEST sp; | |
7803799a UW |
2002 | int i; |
2003 | ||
2004 | /* Set up ABI call-saved/call-clobbered registers. */ | |
2005 | for (i = 0; i < S390_NUM_REGS; i++) | |
2006 | if (!s390_register_call_saved (gdbarch, i)) | |
2007 | trad_frame_set_unknown (info->saved_regs, i); | |
2008 | ||
2009 | /* CC is always call-clobbered. */ | |
d6db1fab | 2010 | trad_frame_set_unknown (info->saved_regs, S390_PSWM_REGNUM); |
a8c99f38 JB |
2011 | |
2012 | /* Get the backchain. */ | |
f089c433 | 2013 | reg = get_frame_register_unsigned (this_frame, S390_SP_REGNUM); |
e17a4113 | 2014 | backchain = read_memory_unsigned_integer (reg, word_size, byte_order); |
a8c99f38 JB |
2015 | |
2016 | /* A zero backchain terminates the frame chain. As additional | |
2017 | sanity check, let's verify that the spill slot for SP in the | |
2018 | save area pointed to by the backchain in fact links back to | |
2019 | the save area. */ | |
2020 | if (backchain != 0 | |
e17a4113 UW |
2021 | && safe_read_memory_integer (backchain + 15*word_size, |
2022 | word_size, byte_order, &sp) | |
a8c99f38 JB |
2023 | && (CORE_ADDR)sp == backchain) |
2024 | { | |
2025 | /* We don't know which registers were saved, but it will have | |
34201ae3 UW |
2026 | to be at least %r14 and %r15. This will allow us to continue |
2027 | unwinding, but other prev-frame registers may be incorrect ... */ | |
a8c99f38 JB |
2028 | info->saved_regs[S390_SP_REGNUM].addr = backchain + 15*word_size; |
2029 | info->saved_regs[S390_RETADDR_REGNUM].addr = backchain + 14*word_size; | |
2030 | ||
2031 | /* Function return will set PC to %r14. */ | |
d6db1fab | 2032 | info->saved_regs[S390_PSWA_REGNUM] |
7803799a | 2033 | = info->saved_regs[S390_RETADDR_REGNUM]; |
a8c99f38 JB |
2034 | |
2035 | /* We use the current value of the frame register as local_base, | |
34201ae3 | 2036 | and the top of the register save area as frame_base. */ |
a8c99f38 JB |
2037 | info->frame_base = backchain + 16*word_size + 32; |
2038 | info->local_base = reg; | |
2039 | } | |
2040 | ||
f089c433 | 2041 | info->func = get_frame_pc (this_frame); |
5769d3cd AC |
2042 | } |
2043 | ||
a8c99f38 | 2044 | static struct s390_unwind_cache * |
f089c433 | 2045 | s390_frame_unwind_cache (struct frame_info *this_frame, |
a8c99f38 JB |
2046 | void **this_prologue_cache) |
2047 | { | |
62261490 | 2048 | volatile struct gdb_exception ex; |
a8c99f38 | 2049 | struct s390_unwind_cache *info; |
62261490 | 2050 | |
a8c99f38 JB |
2051 | if (*this_prologue_cache) |
2052 | return *this_prologue_cache; | |
2053 | ||
2054 | info = FRAME_OBSTACK_ZALLOC (struct s390_unwind_cache); | |
2055 | *this_prologue_cache = info; | |
f089c433 | 2056 | info->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
a8c99f38 JB |
2057 | info->func = -1; |
2058 | info->frame_base = -1; | |
2059 | info->local_base = -1; | |
2060 | ||
62261490 PA |
2061 | TRY_CATCH (ex, RETURN_MASK_ERROR) |
2062 | { | |
2063 | /* Try to use prologue analysis to fill the unwind cache. | |
2064 | If this fails, fall back to reading the stack backchain. */ | |
2065 | if (!s390_prologue_frame_unwind_cache (this_frame, info)) | |
2066 | s390_backchain_frame_unwind_cache (this_frame, info); | |
2067 | } | |
2068 | if (ex.reason < 0 && ex.error != NOT_AVAILABLE_ERROR) | |
2069 | throw_exception (ex); | |
a8c99f38 JB |
2070 | |
2071 | return info; | |
2072 | } | |
5769d3cd | 2073 | |
a78f21af | 2074 | static void |
f089c433 | 2075 | s390_frame_this_id (struct frame_info *this_frame, |
a8c99f38 JB |
2076 | void **this_prologue_cache, |
2077 | struct frame_id *this_id) | |
5769d3cd | 2078 | { |
a8c99f38 | 2079 | struct s390_unwind_cache *info |
f089c433 | 2080 | = s390_frame_unwind_cache (this_frame, this_prologue_cache); |
5769d3cd | 2081 | |
a8c99f38 JB |
2082 | if (info->frame_base == -1) |
2083 | return; | |
5769d3cd | 2084 | |
a8c99f38 | 2085 | *this_id = frame_id_build (info->frame_base, info->func); |
5769d3cd AC |
2086 | } |
2087 | ||
f089c433 UW |
2088 | static struct value * |
2089 | s390_frame_prev_register (struct frame_info *this_frame, | |
2090 | void **this_prologue_cache, int regnum) | |
a8c99f38 | 2091 | { |
7803799a | 2092 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
a8c99f38 | 2093 | struct s390_unwind_cache *info |
f089c433 | 2094 | = s390_frame_unwind_cache (this_frame, this_prologue_cache); |
7803799a | 2095 | |
d6db1fab | 2096 | return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum); |
a8c99f38 JB |
2097 | } |
2098 | ||
2099 | static const struct frame_unwind s390_frame_unwind = { | |
2100 | NORMAL_FRAME, | |
8fbca658 | 2101 | default_frame_unwind_stop_reason, |
a8c99f38 | 2102 | s390_frame_this_id, |
f089c433 UW |
2103 | s390_frame_prev_register, |
2104 | NULL, | |
2105 | default_frame_sniffer | |
a8c99f38 JB |
2106 | }; |
2107 | ||
5769d3cd | 2108 | |
8e645ae7 AC |
2109 | /* Code stubs and their stack frames. For things like PLTs and NULL |
2110 | function calls (where there is no true frame and the return address | |
2111 | is in the RETADDR register). */ | |
a8c99f38 | 2112 | |
8e645ae7 AC |
2113 | struct s390_stub_unwind_cache |
2114 | { | |
a8c99f38 JB |
2115 | CORE_ADDR frame_base; |
2116 | struct trad_frame_saved_reg *saved_regs; | |
2117 | }; | |
2118 | ||
8e645ae7 | 2119 | static struct s390_stub_unwind_cache * |
f089c433 | 2120 | s390_stub_frame_unwind_cache (struct frame_info *this_frame, |
8e645ae7 | 2121 | void **this_prologue_cache) |
5769d3cd | 2122 | { |
f089c433 | 2123 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
a8c99f38 | 2124 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
8e645ae7 | 2125 | struct s390_stub_unwind_cache *info; |
a8c99f38 | 2126 | ULONGEST reg; |
5c3cf190 | 2127 | |
a8c99f38 JB |
2128 | if (*this_prologue_cache) |
2129 | return *this_prologue_cache; | |
5c3cf190 | 2130 | |
8e645ae7 | 2131 | info = FRAME_OBSTACK_ZALLOC (struct s390_stub_unwind_cache); |
a8c99f38 | 2132 | *this_prologue_cache = info; |
f089c433 | 2133 | info->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
a8c99f38 JB |
2134 | |
2135 | /* The return address is in register %r14. */ | |
d6db1fab | 2136 | info->saved_regs[S390_PSWA_REGNUM].realreg = S390_RETADDR_REGNUM; |
a8c99f38 JB |
2137 | |
2138 | /* Retrieve stack pointer and determine our frame base. */ | |
f089c433 | 2139 | reg = get_frame_register_unsigned (this_frame, S390_SP_REGNUM); |
a8c99f38 JB |
2140 | info->frame_base = reg + 16*word_size + 32; |
2141 | ||
2142 | return info; | |
5769d3cd AC |
2143 | } |
2144 | ||
a8c99f38 | 2145 | static void |
f089c433 | 2146 | s390_stub_frame_this_id (struct frame_info *this_frame, |
8e645ae7 AC |
2147 | void **this_prologue_cache, |
2148 | struct frame_id *this_id) | |
5769d3cd | 2149 | { |
8e645ae7 | 2150 | struct s390_stub_unwind_cache *info |
f089c433 UW |
2151 | = s390_stub_frame_unwind_cache (this_frame, this_prologue_cache); |
2152 | *this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame)); | |
a8c99f38 | 2153 | } |
5769d3cd | 2154 | |
f089c433 UW |
2155 | static struct value * |
2156 | s390_stub_frame_prev_register (struct frame_info *this_frame, | |
2157 | void **this_prologue_cache, int regnum) | |
8e645ae7 AC |
2158 | { |
2159 | struct s390_stub_unwind_cache *info | |
f089c433 | 2160 | = s390_stub_frame_unwind_cache (this_frame, this_prologue_cache); |
d6db1fab | 2161 | return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum); |
a8c99f38 JB |
2162 | } |
2163 | ||
f089c433 UW |
2164 | static int |
2165 | s390_stub_frame_sniffer (const struct frame_unwind *self, | |
2166 | struct frame_info *this_frame, | |
2167 | void **this_prologue_cache) | |
a8c99f38 | 2168 | { |
93d42b30 | 2169 | CORE_ADDR addr_in_block; |
8e645ae7 AC |
2170 | bfd_byte insn[S390_MAX_INSTR_SIZE]; |
2171 | ||
2172 | /* If the current PC points to non-readable memory, we assume we | |
2173 | have trapped due to an invalid function pointer call. We handle | |
2174 | the non-existing current function like a PLT stub. */ | |
f089c433 | 2175 | addr_in_block = get_frame_address_in_block (this_frame); |
3e5d3a5a | 2176 | if (in_plt_section (addr_in_block) |
f089c433 UW |
2177 | || s390_readinstruction (insn, get_frame_pc (this_frame)) < 0) |
2178 | return 1; | |
2179 | return 0; | |
a8c99f38 | 2180 | } |
5769d3cd | 2181 | |
f089c433 UW |
2182 | static const struct frame_unwind s390_stub_frame_unwind = { |
2183 | NORMAL_FRAME, | |
8fbca658 | 2184 | default_frame_unwind_stop_reason, |
f089c433 UW |
2185 | s390_stub_frame_this_id, |
2186 | s390_stub_frame_prev_register, | |
2187 | NULL, | |
2188 | s390_stub_frame_sniffer | |
2189 | }; | |
2190 | ||
5769d3cd | 2191 | |
a8c99f38 | 2192 | /* Signal trampoline stack frames. */ |
5769d3cd | 2193 | |
a8c99f38 JB |
2194 | struct s390_sigtramp_unwind_cache { |
2195 | CORE_ADDR frame_base; | |
2196 | struct trad_frame_saved_reg *saved_regs; | |
2197 | }; | |
5769d3cd | 2198 | |
a8c99f38 | 2199 | static struct s390_sigtramp_unwind_cache * |
f089c433 | 2200 | s390_sigtramp_frame_unwind_cache (struct frame_info *this_frame, |
a8c99f38 | 2201 | void **this_prologue_cache) |
5769d3cd | 2202 | { |
f089c433 | 2203 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
7803799a | 2204 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
a8c99f38 | 2205 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
e17a4113 | 2206 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
a8c99f38 JB |
2207 | struct s390_sigtramp_unwind_cache *info; |
2208 | ULONGEST this_sp, prev_sp; | |
7803799a | 2209 | CORE_ADDR next_ra, next_cfa, sigreg_ptr, sigreg_high_off; |
a8c99f38 JB |
2210 | int i; |
2211 | ||
2212 | if (*this_prologue_cache) | |
2213 | return *this_prologue_cache; | |
5769d3cd | 2214 | |
a8c99f38 JB |
2215 | info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache); |
2216 | *this_prologue_cache = info; | |
f089c433 | 2217 | info->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
a8c99f38 | 2218 | |
f089c433 UW |
2219 | this_sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM); |
2220 | next_ra = get_frame_pc (this_frame); | |
a8c99f38 JB |
2221 | next_cfa = this_sp + 16*word_size + 32; |
2222 | ||
2223 | /* New-style RT frame: | |
2224 | retcode + alignment (8 bytes) | |
2225 | siginfo (128 bytes) | |
c378eb4e | 2226 | ucontext (contains sigregs at offset 5 words). */ |
a8c99f38 JB |
2227 | if (next_ra == next_cfa) |
2228 | { | |
f0f63663 | 2229 | sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8); |
7803799a UW |
2230 | /* sigregs are followed by uc_sigmask (8 bytes), then by the |
2231 | upper GPR halves if present. */ | |
2232 | sigreg_high_off = 8; | |
a8c99f38 JB |
2233 | } |
2234 | ||
2235 | /* Old-style RT frame and all non-RT frames: | |
2236 | old signal mask (8 bytes) | |
c378eb4e | 2237 | pointer to sigregs. */ |
5769d3cd AC |
2238 | else |
2239 | { | |
e17a4113 UW |
2240 | sigreg_ptr = read_memory_unsigned_integer (next_cfa + 8, |
2241 | word_size, byte_order); | |
7803799a UW |
2242 | /* sigregs are followed by signo (4 bytes), then by the |
2243 | upper GPR halves if present. */ | |
2244 | sigreg_high_off = 4; | |
a8c99f38 | 2245 | } |
5769d3cd | 2246 | |
a8c99f38 | 2247 | /* The sigregs structure looks like this: |
34201ae3 UW |
2248 | long psw_mask; |
2249 | long psw_addr; | |
2250 | long gprs[16]; | |
2251 | int acrs[16]; | |
2252 | int fpc; | |
2253 | int __pad; | |
2254 | double fprs[16]; */ | |
5769d3cd | 2255 | |
7803799a UW |
2256 | /* PSW mask and address. */ |
2257 | info->saved_regs[S390_PSWM_REGNUM].addr = sigreg_ptr; | |
a8c99f38 | 2258 | sigreg_ptr += word_size; |
7803799a | 2259 | info->saved_regs[S390_PSWA_REGNUM].addr = sigreg_ptr; |
a8c99f38 JB |
2260 | sigreg_ptr += word_size; |
2261 | ||
2262 | /* Then the GPRs. */ | |
2263 | for (i = 0; i < 16; i++) | |
2264 | { | |
2265 | info->saved_regs[S390_R0_REGNUM + i].addr = sigreg_ptr; | |
2266 | sigreg_ptr += word_size; | |
2267 | } | |
2268 | ||
2269 | /* Then the ACRs. */ | |
2270 | for (i = 0; i < 16; i++) | |
2271 | { | |
2272 | info->saved_regs[S390_A0_REGNUM + i].addr = sigreg_ptr; | |
2273 | sigreg_ptr += 4; | |
5769d3cd | 2274 | } |
5769d3cd | 2275 | |
a8c99f38 JB |
2276 | /* The floating-point control word. */ |
2277 | info->saved_regs[S390_FPC_REGNUM].addr = sigreg_ptr; | |
2278 | sigreg_ptr += 8; | |
5769d3cd | 2279 | |
a8c99f38 JB |
2280 | /* And finally the FPRs. */ |
2281 | for (i = 0; i < 16; i++) | |
2282 | { | |
2283 | info->saved_regs[S390_F0_REGNUM + i].addr = sigreg_ptr; | |
2284 | sigreg_ptr += 8; | |
2285 | } | |
2286 | ||
7803799a UW |
2287 | /* If we have them, the GPR upper halves are appended at the end. */ |
2288 | sigreg_ptr += sigreg_high_off; | |
2289 | if (tdep->gpr_full_regnum != -1) | |
2290 | for (i = 0; i < 16; i++) | |
2291 | { | |
34201ae3 | 2292 | info->saved_regs[S390_R0_UPPER_REGNUM + i].addr = sigreg_ptr; |
7803799a UW |
2293 | sigreg_ptr += 4; |
2294 | } | |
2295 | ||
a8c99f38 JB |
2296 | /* Restore the previous frame's SP. */ |
2297 | prev_sp = read_memory_unsigned_integer ( | |
2298 | info->saved_regs[S390_SP_REGNUM].addr, | |
e17a4113 | 2299 | word_size, byte_order); |
5769d3cd | 2300 | |
a8c99f38 JB |
2301 | /* Determine our frame base. */ |
2302 | info->frame_base = prev_sp + 16*word_size + 32; | |
5769d3cd | 2303 | |
a8c99f38 | 2304 | return info; |
5769d3cd AC |
2305 | } |
2306 | ||
a8c99f38 | 2307 | static void |
f089c433 | 2308 | s390_sigtramp_frame_this_id (struct frame_info *this_frame, |
a8c99f38 JB |
2309 | void **this_prologue_cache, |
2310 | struct frame_id *this_id) | |
5769d3cd | 2311 | { |
a8c99f38 | 2312 | struct s390_sigtramp_unwind_cache *info |
f089c433 UW |
2313 | = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache); |
2314 | *this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame)); | |
5769d3cd AC |
2315 | } |
2316 | ||
f089c433 UW |
2317 | static struct value * |
2318 | s390_sigtramp_frame_prev_register (struct frame_info *this_frame, | |
2319 | void **this_prologue_cache, int regnum) | |
a8c99f38 JB |
2320 | { |
2321 | struct s390_sigtramp_unwind_cache *info | |
f089c433 | 2322 | = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache); |
d6db1fab | 2323 | return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum); |
a8c99f38 JB |
2324 | } |
2325 | ||
f089c433 UW |
2326 | static int |
2327 | s390_sigtramp_frame_sniffer (const struct frame_unwind *self, | |
2328 | struct frame_info *this_frame, | |
2329 | void **this_prologue_cache) | |
5769d3cd | 2330 | { |
f089c433 | 2331 | CORE_ADDR pc = get_frame_pc (this_frame); |
a8c99f38 | 2332 | bfd_byte sigreturn[2]; |
4c8287ac | 2333 | |
8defab1a | 2334 | if (target_read_memory (pc, sigreturn, 2)) |
f089c433 | 2335 | return 0; |
4c8287ac | 2336 | |
237b092b | 2337 | if (sigreturn[0] != op_svc) |
f089c433 | 2338 | return 0; |
5769d3cd | 2339 | |
a8c99f38 JB |
2340 | if (sigreturn[1] != 119 /* sigreturn */ |
2341 | && sigreturn[1] != 173 /* rt_sigreturn */) | |
f089c433 | 2342 | return 0; |
34201ae3 | 2343 | |
f089c433 | 2344 | return 1; |
5769d3cd AC |
2345 | } |
2346 | ||
f089c433 UW |
2347 | static const struct frame_unwind s390_sigtramp_frame_unwind = { |
2348 | SIGTRAMP_FRAME, | |
8fbca658 | 2349 | default_frame_unwind_stop_reason, |
f089c433 UW |
2350 | s390_sigtramp_frame_this_id, |
2351 | s390_sigtramp_frame_prev_register, | |
2352 | NULL, | |
2353 | s390_sigtramp_frame_sniffer | |
2354 | }; | |
2355 | ||
237b092b AA |
2356 | /* Retrieve the syscall number at a ptrace syscall-stop. Return -1 |
2357 | upon error. */ | |
2358 | ||
2359 | static LONGEST | |
2360 | s390_linux_get_syscall_number (struct gdbarch *gdbarch, | |
2361 | ptid_t ptid) | |
2362 | { | |
2363 | struct regcache *regs = get_thread_regcache (ptid); | |
2364 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2365 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
2366 | ULONGEST pc; | |
2367 | ULONGEST svc_number = -1; | |
2368 | unsigned opcode; | |
2369 | ||
2370 | /* Assume that the PC points after the 2-byte SVC instruction. We | |
2371 | don't currently support SVC via EXECUTE. */ | |
2372 | regcache_cooked_read_unsigned (regs, tdep->pc_regnum, &pc); | |
2373 | pc -= 2; | |
2374 | opcode = read_memory_unsigned_integer ((CORE_ADDR) pc, 1, byte_order); | |
2375 | if (opcode != op_svc) | |
2376 | return -1; | |
2377 | ||
2378 | svc_number = read_memory_unsigned_integer ((CORE_ADDR) pc + 1, 1, | |
2379 | byte_order); | |
2380 | if (svc_number == 0) | |
2381 | regcache_cooked_read_unsigned (regs, S390_R1_REGNUM, &svc_number); | |
2382 | ||
2383 | return svc_number; | |
2384 | } | |
2385 | ||
4c8287ac | 2386 | |
a8c99f38 JB |
2387 | /* Frame base handling. */ |
2388 | ||
2389 | static CORE_ADDR | |
f089c433 | 2390 | s390_frame_base_address (struct frame_info *this_frame, void **this_cache) |
4c8287ac | 2391 | { |
a8c99f38 | 2392 | struct s390_unwind_cache *info |
f089c433 | 2393 | = s390_frame_unwind_cache (this_frame, this_cache); |
a8c99f38 JB |
2394 | return info->frame_base; |
2395 | } | |
2396 | ||
2397 | static CORE_ADDR | |
f089c433 | 2398 | s390_local_base_address (struct frame_info *this_frame, void **this_cache) |
a8c99f38 JB |
2399 | { |
2400 | struct s390_unwind_cache *info | |
f089c433 | 2401 | = s390_frame_unwind_cache (this_frame, this_cache); |
a8c99f38 JB |
2402 | return info->local_base; |
2403 | } | |
2404 | ||
2405 | static const struct frame_base s390_frame_base = { | |
2406 | &s390_frame_unwind, | |
2407 | s390_frame_base_address, | |
2408 | s390_local_base_address, | |
2409 | s390_local_base_address | |
2410 | }; | |
2411 | ||
2412 | static CORE_ADDR | |
2413 | s390_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
2414 | { | |
7803799a | 2415 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
a8c99f38 | 2416 | ULONGEST pc; |
7803799a | 2417 | pc = frame_unwind_register_unsigned (next_frame, tdep->pc_regnum); |
a8c99f38 JB |
2418 | return gdbarch_addr_bits_remove (gdbarch, pc); |
2419 | } | |
2420 | ||
2421 | static CORE_ADDR | |
2422 | s390_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
2423 | { | |
2424 | ULONGEST sp; | |
2425 | sp = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM); | |
2426 | return gdbarch_addr_bits_remove (gdbarch, sp); | |
4c8287ac JB |
2427 | } |
2428 | ||
2429 | ||
a431654a AC |
2430 | /* DWARF-2 frame support. */ |
2431 | ||
7803799a UW |
2432 | static struct value * |
2433 | s390_dwarf2_prev_register (struct frame_info *this_frame, void **this_cache, | |
2434 | int regnum) | |
2435 | { | |
d6db1fab | 2436 | return s390_unwind_pseudo_register (this_frame, regnum); |
7803799a UW |
2437 | } |
2438 | ||
a431654a AC |
2439 | static void |
2440 | s390_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, | |
34201ae3 | 2441 | struct dwarf2_frame_state_reg *reg, |
4a4e5149 | 2442 | struct frame_info *this_frame) |
a431654a AC |
2443 | { |
2444 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2445 | ||
d6db1fab UW |
2446 | /* The condition code (and thus PSW mask) is call-clobbered. */ |
2447 | if (regnum == S390_PSWM_REGNUM) | |
2448 | reg->how = DWARF2_FRAME_REG_UNDEFINED; | |
2449 | ||
2450 | /* The PSW address unwinds to the return address. */ | |
2451 | else if (regnum == S390_PSWA_REGNUM) | |
2452 | reg->how = DWARF2_FRAME_REG_RA; | |
2453 | ||
7803799a UW |
2454 | /* Fixed registers are call-saved or call-clobbered |
2455 | depending on the ABI in use. */ | |
d6db1fab | 2456 | else if (regnum < S390_NUM_REGS) |
a431654a | 2457 | { |
7803799a | 2458 | if (s390_register_call_saved (gdbarch, regnum)) |
a431654a | 2459 | reg->how = DWARF2_FRAME_REG_SAME_VALUE; |
7803799a | 2460 | else |
a431654a | 2461 | reg->how = DWARF2_FRAME_REG_UNDEFINED; |
7803799a | 2462 | } |
a431654a | 2463 | |
d6db1fab UW |
2464 | /* We install a special function to unwind pseudos. */ |
2465 | else | |
7803799a UW |
2466 | { |
2467 | reg->how = DWARF2_FRAME_REG_FN; | |
2468 | reg->loc.fn = s390_dwarf2_prev_register; | |
a431654a AC |
2469 | } |
2470 | } | |
2471 | ||
2472 | ||
b0cf273e JB |
2473 | /* Dummy function calls. */ |
2474 | ||
78f8b424 JB |
2475 | /* Return non-zero if TYPE is an integer-like type, zero otherwise. |
2476 | "Integer-like" types are those that should be passed the way | |
2477 | integers are: integers, enums, ranges, characters, and booleans. */ | |
2478 | static int | |
2479 | is_integer_like (struct type *type) | |
2480 | { | |
2481 | enum type_code code = TYPE_CODE (type); | |
2482 | ||
2483 | return (code == TYPE_CODE_INT | |
34201ae3 UW |
2484 | || code == TYPE_CODE_ENUM |
2485 | || code == TYPE_CODE_RANGE | |
2486 | || code == TYPE_CODE_CHAR | |
2487 | || code == TYPE_CODE_BOOL); | |
78f8b424 JB |
2488 | } |
2489 | ||
78f8b424 JB |
2490 | /* Return non-zero if TYPE is a pointer-like type, zero otherwise. |
2491 | "Pointer-like" types are those that should be passed the way | |
2492 | pointers are: pointers and references. */ | |
2493 | static int | |
2494 | is_pointer_like (struct type *type) | |
2495 | { | |
2496 | enum type_code code = TYPE_CODE (type); | |
2497 | ||
2498 | return (code == TYPE_CODE_PTR | |
34201ae3 | 2499 | || code == TYPE_CODE_REF); |
78f8b424 JB |
2500 | } |
2501 | ||
2502 | ||
20a940cc JB |
2503 | /* Return non-zero if TYPE is a `float singleton' or `double |
2504 | singleton', zero otherwise. | |
2505 | ||
2506 | A `T singleton' is a struct type with one member, whose type is | |
2507 | either T or a `T singleton'. So, the following are all float | |
2508 | singletons: | |
2509 | ||
2510 | struct { float x }; | |
2511 | struct { struct { float x; } x; }; | |
2512 | struct { struct { struct { float x; } x; } x; }; | |
2513 | ||
2514 | ... and so on. | |
2515 | ||
b0cf273e JB |
2516 | All such structures are passed as if they were floats or doubles, |
2517 | as the (revised) ABI says. */ | |
20a940cc JB |
2518 | static int |
2519 | is_float_singleton (struct type *type) | |
2520 | { | |
b0cf273e JB |
2521 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1) |
2522 | { | |
2523 | struct type *singleton_type = TYPE_FIELD_TYPE (type, 0); | |
2524 | CHECK_TYPEDEF (singleton_type); | |
2525 | ||
2526 | return (TYPE_CODE (singleton_type) == TYPE_CODE_FLT | |
a16b8bcd | 2527 | || TYPE_CODE (singleton_type) == TYPE_CODE_DECFLOAT |
b0cf273e JB |
2528 | || is_float_singleton (singleton_type)); |
2529 | } | |
2530 | ||
2531 | return 0; | |
20a940cc JB |
2532 | } |
2533 | ||
2534 | ||
2535 | /* Return non-zero if TYPE is a struct-like type, zero otherwise. | |
2536 | "Struct-like" types are those that should be passed as structs are: | |
2537 | structs and unions. | |
2538 | ||
2539 | As an odd quirk, not mentioned in the ABI, GCC passes float and | |
2540 | double singletons as if they were a plain float, double, etc. (The | |
2541 | corresponding union types are handled normally.) So we exclude | |
2542 | those types here. *shrug* */ | |
2543 | static int | |
2544 | is_struct_like (struct type *type) | |
2545 | { | |
2546 | enum type_code code = TYPE_CODE (type); | |
2547 | ||
2548 | return (code == TYPE_CODE_UNION | |
34201ae3 | 2549 | || (code == TYPE_CODE_STRUCT && ! is_float_singleton (type))); |
20a940cc JB |
2550 | } |
2551 | ||
2552 | ||
2553 | /* Return non-zero if TYPE is a float-like type, zero otherwise. | |
2554 | "Float-like" types are those that should be passed as | |
2555 | floating-point values are. | |
2556 | ||
2557 | You'd think this would just be floats, doubles, long doubles, etc. | |
2558 | But as an odd quirk, not mentioned in the ABI, GCC passes float and | |
2559 | double singletons as if they were a plain float, double, etc. (The | |
4d819d0e | 2560 | corresponding union types are handled normally.) So we include |
20a940cc JB |
2561 | those types here. *shrug* */ |
2562 | static int | |
2563 | is_float_like (struct type *type) | |
2564 | { | |
2565 | return (TYPE_CODE (type) == TYPE_CODE_FLT | |
a16b8bcd | 2566 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT |
34201ae3 | 2567 | || is_float_singleton (type)); |
20a940cc JB |
2568 | } |
2569 | ||
2570 | ||
78f8b424 | 2571 | static int |
b0cf273e | 2572 | is_power_of_two (unsigned int n) |
78f8b424 | 2573 | { |
b0cf273e | 2574 | return ((n & (n - 1)) == 0); |
78f8b424 JB |
2575 | } |
2576 | ||
b0cf273e JB |
2577 | /* Return non-zero if TYPE should be passed as a pointer to a copy, |
2578 | zero otherwise. */ | |
4d819d0e | 2579 | static int |
b0cf273e | 2580 | s390_function_arg_pass_by_reference (struct type *type) |
4d819d0e | 2581 | { |
354ecfd5 | 2582 | if (TYPE_LENGTH (type) > 8) |
b0cf273e | 2583 | return 1; |
4d819d0e | 2584 | |
56b9d9ac UW |
2585 | return (is_struct_like (type) && !is_power_of_two (TYPE_LENGTH (type))) |
2586 | || TYPE_CODE (type) == TYPE_CODE_COMPLEX | |
2587 | || (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)); | |
4d819d0e JB |
2588 | } |
2589 | ||
b0cf273e JB |
2590 | /* Return non-zero if TYPE should be passed in a float register |
2591 | if possible. */ | |
78f8b424 | 2592 | static int |
b0cf273e | 2593 | s390_function_arg_float (struct type *type) |
78f8b424 | 2594 | { |
354ecfd5 | 2595 | if (TYPE_LENGTH (type) > 8) |
b0cf273e | 2596 | return 0; |
78f8b424 | 2597 | |
b0cf273e | 2598 | return is_float_like (type); |
4d819d0e JB |
2599 | } |
2600 | ||
b0cf273e JB |
2601 | /* Return non-zero if TYPE should be passed in an integer register |
2602 | (or a pair of integer registers) if possible. */ | |
78f8b424 | 2603 | static int |
b0cf273e | 2604 | s390_function_arg_integer (struct type *type) |
78f8b424 | 2605 | { |
354ecfd5 | 2606 | if (TYPE_LENGTH (type) > 8) |
b0cf273e | 2607 | return 0; |
78f8b424 | 2608 | |
b0cf273e JB |
2609 | return is_integer_like (type) |
2610 | || is_pointer_like (type) | |
354ecfd5 | 2611 | || (is_struct_like (type) && is_power_of_two (TYPE_LENGTH (type))); |
78f8b424 JB |
2612 | } |
2613 | ||
78f8b424 JB |
2614 | /* Return ARG, a `SIMPLE_ARG', sign-extended or zero-extended to a full |
2615 | word as required for the ABI. */ | |
2616 | static LONGEST | |
e17a4113 | 2617 | extend_simple_arg (struct gdbarch *gdbarch, struct value *arg) |
78f8b424 | 2618 | { |
e17a4113 | 2619 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
56b9d9ac | 2620 | struct type *type = check_typedef (value_type (arg)); |
78f8b424 JB |
2621 | |
2622 | /* Even structs get passed in the least significant bits of the | |
2623 | register / memory word. It's not really right to extract them as | |
2624 | an integer, but it does take care of the extension. */ | |
2625 | if (TYPE_UNSIGNED (type)) | |
0fd88904 | 2626 | return extract_unsigned_integer (value_contents (arg), |
34201ae3 | 2627 | TYPE_LENGTH (type), byte_order); |
78f8b424 | 2628 | else |
0fd88904 | 2629 | return extract_signed_integer (value_contents (arg), |
34201ae3 | 2630 | TYPE_LENGTH (type), byte_order); |
78f8b424 JB |
2631 | } |
2632 | ||
2633 | ||
78f8b424 JB |
2634 | /* Return the alignment required by TYPE. */ |
2635 | static int | |
2636 | alignment_of (struct type *type) | |
2637 | { | |
2638 | int alignment; | |
2639 | ||
2640 | if (is_integer_like (type) | |
2641 | || is_pointer_like (type) | |
a16b8bcd UW |
2642 | || TYPE_CODE (type) == TYPE_CODE_FLT |
2643 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
78f8b424 JB |
2644 | alignment = TYPE_LENGTH (type); |
2645 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
34201ae3 | 2646 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
78f8b424 JB |
2647 | { |
2648 | int i; | |
2649 | ||
2650 | alignment = 1; | |
2651 | for (i = 0; i < TYPE_NFIELDS (type); i++) | |
34201ae3 UW |
2652 | { |
2653 | int field_alignment | |
56b9d9ac | 2654 | = alignment_of (check_typedef (TYPE_FIELD_TYPE (type, i))); |
78f8b424 | 2655 | |
34201ae3 UW |
2656 | if (field_alignment > alignment) |
2657 | alignment = field_alignment; | |
2658 | } | |
78f8b424 JB |
2659 | } |
2660 | else | |
2661 | alignment = 1; | |
2662 | ||
2663 | /* Check that everything we ever return is a power of two. Lots of | |
2664 | code doesn't want to deal with aligning things to arbitrary | |
2665 | boundaries. */ | |
2666 | gdb_assert ((alignment & (alignment - 1)) == 0); | |
2667 | ||
2668 | return alignment; | |
2669 | } | |
2670 | ||
2671 | ||
2672 | /* Put the actual parameter values pointed to by ARGS[0..NARGS-1] in | |
ca557f44 AC |
2673 | place to be passed to a function, as specified by the "GNU/Linux |
2674 | for S/390 ELF Application Binary Interface Supplement". | |
78f8b424 JB |
2675 | |
2676 | SP is the current stack pointer. We must put arguments, links, | |
2677 | padding, etc. whereever they belong, and return the new stack | |
2678 | pointer value. | |
34201ae3 | 2679 | |
78f8b424 JB |
2680 | If STRUCT_RETURN is non-zero, then the function we're calling is |
2681 | going to return a structure by value; STRUCT_ADDR is the address of | |
2682 | a block we've allocated for it on the stack. | |
2683 | ||
2684 | Our caller has taken care of any type promotions needed to satisfy | |
2685 | prototypes or the old K&R argument-passing rules. */ | |
a78f21af | 2686 | static CORE_ADDR |
7d9b040b | 2687 | s390_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
b0cf273e JB |
2688 | struct regcache *regcache, CORE_ADDR bp_addr, |
2689 | int nargs, struct value **args, CORE_ADDR sp, | |
2690 | int struct_return, CORE_ADDR struct_addr) | |
5769d3cd | 2691 | { |
b0cf273e JB |
2692 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2693 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
e17a4113 | 2694 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
78f8b424 | 2695 | int i; |
5769d3cd | 2696 | |
78f8b424 JB |
2697 | /* If the i'th argument is passed as a reference to a copy, then |
2698 | copy_addr[i] is the address of the copy we made. */ | |
2699 | CORE_ADDR *copy_addr = alloca (nargs * sizeof (CORE_ADDR)); | |
5769d3cd | 2700 | |
c0cc4c83 | 2701 | /* Reserve space for the reference-to-copy area. */ |
78f8b424 JB |
2702 | for (i = 0; i < nargs; i++) |
2703 | { | |
2704 | struct value *arg = args[i]; | |
56b9d9ac | 2705 | struct type *type = check_typedef (value_type (arg)); |
5769d3cd | 2706 | |
b0cf273e | 2707 | if (s390_function_arg_pass_by_reference (type)) |
34201ae3 UW |
2708 | { |
2709 | sp -= TYPE_LENGTH (type); | |
2710 | sp = align_down (sp, alignment_of (type)); | |
2711 | copy_addr[i] = sp; | |
2712 | } | |
5769d3cd | 2713 | } |
5769d3cd | 2714 | |
78f8b424 JB |
2715 | /* Reserve space for the parameter area. As a conservative |
2716 | simplification, we assume that everything will be passed on the | |
34201ae3 | 2717 | stack. Since every argument larger than 8 bytes will be |
b0cf273e JB |
2718 | passed by reference, we use this simple upper bound. */ |
2719 | sp -= nargs * 8; | |
78f8b424 | 2720 | |
78f8b424 JB |
2721 | /* After all that, make sure it's still aligned on an eight-byte |
2722 | boundary. */ | |
5b03f266 | 2723 | sp = align_down (sp, 8); |
78f8b424 | 2724 | |
c0cc4c83 UW |
2725 | /* Allocate the standard frame areas: the register save area, the |
2726 | word reserved for the compiler (which seems kind of meaningless), | |
2727 | and the back chain pointer. */ | |
2728 | sp -= 16*word_size + 32; | |
2729 | ||
2730 | /* Now we have the final SP value. Make sure we didn't underflow; | |
2731 | on 31-bit, this would result in addresses with the high bit set, | |
2732 | which causes confusion elsewhere. Note that if we error out | |
2733 | here, stack and registers remain untouched. */ | |
2734 | if (gdbarch_addr_bits_remove (gdbarch, sp) != sp) | |
2735 | error (_("Stack overflow")); | |
2736 | ||
2737 | ||
78f8b424 JB |
2738 | /* Finally, place the actual parameters, working from SP towards |
2739 | higher addresses. The code above is supposed to reserve enough | |
2740 | space for this. */ | |
2741 | { | |
2742 | int fr = 0; | |
2743 | int gr = 2; | |
c0cc4c83 | 2744 | CORE_ADDR starg = sp + 16*word_size + 32; |
78f8b424 | 2745 | |
b0cf273e | 2746 | /* A struct is returned using general register 2. */ |
4d819d0e | 2747 | if (struct_return) |
b0cf273e JB |
2748 | { |
2749 | regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr, | |
34201ae3 | 2750 | struct_addr); |
b0cf273e JB |
2751 | gr++; |
2752 | } | |
4d819d0e | 2753 | |
78f8b424 JB |
2754 | for (i = 0; i < nargs; i++) |
2755 | { | |
34201ae3 UW |
2756 | struct value *arg = args[i]; |
2757 | struct type *type = check_typedef (value_type (arg)); | |
2758 | unsigned length = TYPE_LENGTH (type); | |
b0cf273e JB |
2759 | |
2760 | if (s390_function_arg_pass_by_reference (type)) | |
2761 | { | |
c0cc4c83 UW |
2762 | /* Actually copy the argument contents to the stack slot |
2763 | that was reserved above. */ | |
2764 | write_memory (copy_addr[i], value_contents (arg), length); | |
2765 | ||
b0cf273e JB |
2766 | if (gr <= 6) |
2767 | { | |
2768 | regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr, | |
34201ae3 | 2769 | copy_addr[i]); |
b0cf273e JB |
2770 | gr++; |
2771 | } | |
2772 | else | |
2773 | { | |
e17a4113 UW |
2774 | write_memory_unsigned_integer (starg, word_size, byte_order, |
2775 | copy_addr[i]); | |
b0cf273e JB |
2776 | starg += word_size; |
2777 | } | |
2778 | } | |
2779 | else if (s390_function_arg_float (type)) | |
2780 | { | |
2781 | /* The GNU/Linux for S/390 ABI uses FPRs 0 and 2 to pass arguments, | |
2782 | the GNU/Linux for zSeries ABI uses 0, 2, 4, and 6. */ | |
2783 | if (fr <= (tdep->abi == ABI_LINUX_S390 ? 2 : 6)) | |
2784 | { | |
2785 | /* When we store a single-precision value in an FP register, | |
2786 | it occupies the leftmost bits. */ | |
2787 | regcache_cooked_write_part (regcache, S390_F0_REGNUM + fr, | |
0fd88904 | 2788 | 0, length, value_contents (arg)); |
b0cf273e JB |
2789 | fr += 2; |
2790 | } | |
2791 | else | |
2792 | { | |
2793 | /* When we store a single-precision value in a stack slot, | |
2794 | it occupies the rightmost bits. */ | |
2795 | starg = align_up (starg + length, word_size); | |
34201ae3 | 2796 | write_memory (starg - length, value_contents (arg), length); |
b0cf273e JB |
2797 | } |
2798 | } | |
2799 | else if (s390_function_arg_integer (type) && length <= word_size) | |
2800 | { | |
2801 | if (gr <= 6) | |
2802 | { | |
2803 | /* Integer arguments are always extended to word size. */ | |
2804 | regcache_cooked_write_signed (regcache, S390_R0_REGNUM + gr, | |
c378eb4e MS |
2805 | extend_simple_arg (gdbarch, |
2806 | arg)); | |
b0cf273e JB |
2807 | gr++; |
2808 | } | |
2809 | else | |
2810 | { | |
2811 | /* Integer arguments are always extended to word size. */ | |
e17a4113 | 2812 | write_memory_signed_integer (starg, word_size, byte_order, |
34201ae3 UW |
2813 | extend_simple_arg (gdbarch, arg)); |
2814 | starg += word_size; | |
b0cf273e JB |
2815 | } |
2816 | } | |
2817 | else if (s390_function_arg_integer (type) && length == 2*word_size) | |
2818 | { | |
2819 | if (gr <= 5) | |
2820 | { | |
2821 | regcache_cooked_write (regcache, S390_R0_REGNUM + gr, | |
0fd88904 | 2822 | value_contents (arg)); |
b0cf273e | 2823 | regcache_cooked_write (regcache, S390_R0_REGNUM + gr + 1, |
0fd88904 | 2824 | value_contents (arg) + word_size); |
b0cf273e JB |
2825 | gr += 2; |
2826 | } | |
2827 | else | |
2828 | { | |
2829 | /* If we skipped r6 because we couldn't fit a DOUBLE_ARG | |
2830 | in it, then don't go back and use it again later. */ | |
2831 | gr = 7; | |
2832 | ||
0fd88904 | 2833 | write_memory (starg, value_contents (arg), length); |
b0cf273e JB |
2834 | starg += length; |
2835 | } | |
2836 | } | |
2837 | else | |
e2e0b3e5 | 2838 | internal_error (__FILE__, __LINE__, _("unknown argument type")); |
78f8b424 JB |
2839 | } |
2840 | } | |
2841 | ||
8de7d199 UW |
2842 | /* Store return PSWA. In 31-bit mode, keep addressing mode bit. */ |
2843 | if (word_size == 4) | |
2844 | { | |
2845 | ULONGEST pswa; | |
2846 | regcache_cooked_read_unsigned (regcache, S390_PSWA_REGNUM, &pswa); | |
2847 | bp_addr = (bp_addr & 0x7fffffff) | (pswa & 0x80000000); | |
2848 | } | |
b0cf273e | 2849 | regcache_cooked_write_unsigned (regcache, S390_RETADDR_REGNUM, bp_addr); |
8de7d199 | 2850 | |
b0cf273e JB |
2851 | /* Store updated stack pointer. */ |
2852 | regcache_cooked_write_unsigned (regcache, S390_SP_REGNUM, sp); | |
78f8b424 | 2853 | |
a8c99f38 | 2854 | /* We need to return the 'stack part' of the frame ID, |
121d8485 UW |
2855 | which is actually the top of the register save area. */ |
2856 | return sp + 16*word_size + 32; | |
5769d3cd AC |
2857 | } |
2858 | ||
f089c433 | 2859 | /* Assuming THIS_FRAME is a dummy, return the frame ID of that |
b0cf273e JB |
2860 | dummy frame. The frame ID's base needs to match the TOS value |
2861 | returned by push_dummy_call, and the PC match the dummy frame's | |
2862 | breakpoint. */ | |
2863 | static struct frame_id | |
f089c433 | 2864 | s390_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
b0cf273e | 2865 | { |
a8c99f38 | 2866 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
f089c433 UW |
2867 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM); |
2868 | sp = gdbarch_addr_bits_remove (gdbarch, sp); | |
a8c99f38 | 2869 | |
121d8485 | 2870 | return frame_id_build (sp + 16*word_size + 32, |
34201ae3 | 2871 | get_frame_pc (this_frame)); |
b0cf273e | 2872 | } |
c8f9d51c | 2873 | |
4074e13c JB |
2874 | static CORE_ADDR |
2875 | s390_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
2876 | { | |
2877 | /* Both the 32- and 64-bit ABI's say that the stack pointer should | |
2878 | always be aligned on an eight-byte boundary. */ | |
2879 | return (addr & -8); | |
2880 | } | |
2881 | ||
2882 | ||
b0cf273e JB |
2883 | /* Function return value access. */ |
2884 | ||
2885 | static enum return_value_convention | |
2886 | s390_return_value_convention (struct gdbarch *gdbarch, struct type *type) | |
c8f9d51c | 2887 | { |
354ecfd5 | 2888 | if (TYPE_LENGTH (type) > 8) |
b0cf273e JB |
2889 | return RETURN_VALUE_STRUCT_CONVENTION; |
2890 | ||
2891 | switch (TYPE_CODE (type)) | |
2892 | { | |
2893 | case TYPE_CODE_STRUCT: | |
2894 | case TYPE_CODE_UNION: | |
2895 | case TYPE_CODE_ARRAY: | |
56b9d9ac | 2896 | case TYPE_CODE_COMPLEX: |
b0cf273e | 2897 | return RETURN_VALUE_STRUCT_CONVENTION; |
c8f9d51c | 2898 | |
b0cf273e JB |
2899 | default: |
2900 | return RETURN_VALUE_REGISTER_CONVENTION; | |
2901 | } | |
c8f9d51c JB |
2902 | } |
2903 | ||
b0cf273e | 2904 | static enum return_value_convention |
6a3a010b | 2905 | s390_return_value (struct gdbarch *gdbarch, struct value *function, |
c055b101 CV |
2906 | struct type *type, struct regcache *regcache, |
2907 | gdb_byte *out, const gdb_byte *in) | |
5769d3cd | 2908 | { |
e17a4113 | 2909 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
b0cf273e | 2910 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
56b9d9ac UW |
2911 | enum return_value_convention rvc; |
2912 | int length; | |
2913 | ||
2914 | type = check_typedef (type); | |
2915 | rvc = s390_return_value_convention (gdbarch, type); | |
2916 | length = TYPE_LENGTH (type); | |
2917 | ||
b0cf273e JB |
2918 | if (in) |
2919 | { | |
2920 | switch (rvc) | |
2921 | { | |
2922 | case RETURN_VALUE_REGISTER_CONVENTION: | |
a16b8bcd UW |
2923 | if (TYPE_CODE (type) == TYPE_CODE_FLT |
2924 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
b0cf273e JB |
2925 | { |
2926 | /* When we store a single-precision value in an FP register, | |
2927 | it occupies the leftmost bits. */ | |
34201ae3 | 2928 | regcache_cooked_write_part (regcache, S390_F0_REGNUM, |
b0cf273e JB |
2929 | 0, length, in); |
2930 | } | |
2931 | else if (length <= word_size) | |
2932 | { | |
2933 | /* Integer arguments are always extended to word size. */ | |
2934 | if (TYPE_UNSIGNED (type)) | |
2935 | regcache_cooked_write_unsigned (regcache, S390_R2_REGNUM, | |
e17a4113 | 2936 | extract_unsigned_integer (in, length, byte_order)); |
b0cf273e JB |
2937 | else |
2938 | regcache_cooked_write_signed (regcache, S390_R2_REGNUM, | |
e17a4113 | 2939 | extract_signed_integer (in, length, byte_order)); |
b0cf273e JB |
2940 | } |
2941 | else if (length == 2*word_size) | |
2942 | { | |
2943 | regcache_cooked_write (regcache, S390_R2_REGNUM, in); | |
43af2100 | 2944 | regcache_cooked_write (regcache, S390_R3_REGNUM, in + word_size); |
b0cf273e JB |
2945 | } |
2946 | else | |
e2e0b3e5 | 2947 | internal_error (__FILE__, __LINE__, _("invalid return type")); |
b0cf273e JB |
2948 | break; |
2949 | ||
2950 | case RETURN_VALUE_STRUCT_CONVENTION: | |
8a3fe4f8 | 2951 | error (_("Cannot set function return value.")); |
b0cf273e JB |
2952 | break; |
2953 | } | |
2954 | } | |
2955 | else if (out) | |
2956 | { | |
2957 | switch (rvc) | |
2958 | { | |
2959 | case RETURN_VALUE_REGISTER_CONVENTION: | |
a16b8bcd UW |
2960 | if (TYPE_CODE (type) == TYPE_CODE_FLT |
2961 | || TYPE_CODE (type) == TYPE_CODE_DECFLOAT) | |
b0cf273e JB |
2962 | { |
2963 | /* When we store a single-precision value in an FP register, | |
2964 | it occupies the leftmost bits. */ | |
34201ae3 | 2965 | regcache_cooked_read_part (regcache, S390_F0_REGNUM, |
b0cf273e JB |
2966 | 0, length, out); |
2967 | } | |
2968 | else if (length <= word_size) | |
2969 | { | |
2970 | /* Integer arguments occupy the rightmost bits. */ | |
34201ae3 | 2971 | regcache_cooked_read_part (regcache, S390_R2_REGNUM, |
b0cf273e JB |
2972 | word_size - length, length, out); |
2973 | } | |
2974 | else if (length == 2*word_size) | |
2975 | { | |
2976 | regcache_cooked_read (regcache, S390_R2_REGNUM, out); | |
43af2100 | 2977 | regcache_cooked_read (regcache, S390_R3_REGNUM, out + word_size); |
b0cf273e JB |
2978 | } |
2979 | else | |
e2e0b3e5 | 2980 | internal_error (__FILE__, __LINE__, _("invalid return type")); |
b0cf273e | 2981 | break; |
5769d3cd | 2982 | |
b0cf273e | 2983 | case RETURN_VALUE_STRUCT_CONVENTION: |
8a3fe4f8 | 2984 | error (_("Function return value unknown.")); |
b0cf273e JB |
2985 | break; |
2986 | } | |
2987 | } | |
2988 | ||
2989 | return rvc; | |
2990 | } | |
5769d3cd AC |
2991 | |
2992 | ||
a8c99f38 JB |
2993 | /* Breakpoints. */ |
2994 | ||
43af2100 | 2995 | static const gdb_byte * |
c378eb4e MS |
2996 | s390_breakpoint_from_pc (struct gdbarch *gdbarch, |
2997 | CORE_ADDR *pcptr, int *lenptr) | |
5769d3cd | 2998 | { |
43af2100 | 2999 | static const gdb_byte breakpoint[] = { 0x0, 0x1 }; |
5769d3cd AC |
3000 | |
3001 | *lenptr = sizeof (breakpoint); | |
3002 | return breakpoint; | |
3003 | } | |
3004 | ||
5769d3cd | 3005 | |
a8c99f38 | 3006 | /* Address handling. */ |
5769d3cd AC |
3007 | |
3008 | static CORE_ADDR | |
24568a2c | 3009 | s390_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr) |
5769d3cd | 3010 | { |
a8c99f38 | 3011 | return addr & 0x7fffffff; |
5769d3cd AC |
3012 | } |
3013 | ||
ffc65945 KB |
3014 | static int |
3015 | s390_address_class_type_flags (int byte_size, int dwarf2_addr_class) | |
3016 | { | |
3017 | if (byte_size == 4) | |
119ac181 | 3018 | return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1; |
ffc65945 KB |
3019 | else |
3020 | return 0; | |
3021 | } | |
3022 | ||
3023 | static const char * | |
3024 | s390_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags) | |
3025 | { | |
119ac181 | 3026 | if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1) |
ffc65945 KB |
3027 | return "mode32"; |
3028 | else | |
3029 | return NULL; | |
3030 | } | |
3031 | ||
a78f21af | 3032 | static int |
c378eb4e MS |
3033 | s390_address_class_name_to_type_flags (struct gdbarch *gdbarch, |
3034 | const char *name, | |
ffc65945 KB |
3035 | int *type_flags_ptr) |
3036 | { | |
3037 | if (strcmp (name, "mode32") == 0) | |
3038 | { | |
119ac181 | 3039 | *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1; |
ffc65945 KB |
3040 | return 1; |
3041 | } | |
3042 | else | |
3043 | return 0; | |
3044 | } | |
3045 | ||
55aa24fb SDJ |
3046 | /* Implementation of `gdbarch_stap_is_single_operand', as defined in |
3047 | gdbarch.h. */ | |
3048 | ||
3049 | static int | |
3050 | s390_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) | |
3051 | { | |
3052 | return ((isdigit (*s) && s[1] == '(' && s[2] == '%') /* Displacement | |
3053 | or indirection. */ | |
3054 | || *s == '%' /* Register access. */ | |
3055 | || isdigit (*s)); /* Literal number. */ | |
3056 | } | |
3057 | ||
a8c99f38 JB |
3058 | /* Set up gdbarch struct. */ |
3059 | ||
a78f21af | 3060 | static struct gdbarch * |
5769d3cd AC |
3061 | s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
3062 | { | |
7803799a UW |
3063 | const struct target_desc *tdesc = info.target_desc; |
3064 | struct tdesc_arch_data *tdesc_data = NULL; | |
5769d3cd AC |
3065 | struct gdbarch *gdbarch; |
3066 | struct gdbarch_tdep *tdep; | |
7803799a UW |
3067 | int tdep_abi; |
3068 | int have_upper = 0; | |
c642a434 UW |
3069 | int have_linux_v1 = 0; |
3070 | int have_linux_v2 = 0; | |
7803799a | 3071 | int first_pseudo_reg, last_pseudo_reg; |
05c0465e SDJ |
3072 | static const char *const stap_register_prefixes[] = { "%", NULL }; |
3073 | static const char *const stap_register_indirection_prefixes[] = { "(", | |
3074 | NULL }; | |
3075 | static const char *const stap_register_indirection_suffixes[] = { ")", | |
3076 | NULL }; | |
7803799a UW |
3077 | |
3078 | /* Default ABI and register size. */ | |
3079 | switch (info.bfd_arch_info->mach) | |
3080 | { | |
3081 | case bfd_mach_s390_31: | |
3082 | tdep_abi = ABI_LINUX_S390; | |
3083 | break; | |
3084 | ||
3085 | case bfd_mach_s390_64: | |
3086 | tdep_abi = ABI_LINUX_ZSERIES; | |
3087 | break; | |
3088 | ||
3089 | default: | |
3090 | return NULL; | |
3091 | } | |
3092 | ||
3093 | /* Use default target description if none provided by the target. */ | |
3094 | if (!tdesc_has_registers (tdesc)) | |
3095 | { | |
3096 | if (tdep_abi == ABI_LINUX_S390) | |
3097 | tdesc = tdesc_s390_linux32; | |
3098 | else | |
3099 | tdesc = tdesc_s390x_linux64; | |
3100 | } | |
3101 | ||
3102 | /* Check any target description for validity. */ | |
3103 | if (tdesc_has_registers (tdesc)) | |
3104 | { | |
3105 | static const char *const gprs[] = { | |
3106 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
3107 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | |
3108 | }; | |
3109 | static const char *const fprs[] = { | |
3110 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", | |
3111 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15" | |
3112 | }; | |
3113 | static const char *const acrs[] = { | |
3114 | "acr0", "acr1", "acr2", "acr3", "acr4", "acr5", "acr6", "acr7", | |
3115 | "acr8", "acr9", "acr10", "acr11", "acr12", "acr13", "acr14", "acr15" | |
3116 | }; | |
3117 | static const char *const gprs_lower[] = { | |
3118 | "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l", | |
3119 | "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l" | |
3120 | }; | |
3121 | static const char *const gprs_upper[] = { | |
3122 | "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h", | |
3123 | "r8h", "r9h", "r10h", "r11h", "r12h", "r13h", "r14h", "r15h" | |
3124 | }; | |
4ac33720 UW |
3125 | static const char *const tdb_regs[] = { |
3126 | "tdb0", "tac", "tct", "atia", | |
3127 | "tr0", "tr1", "tr2", "tr3", "tr4", "tr5", "tr6", "tr7", | |
3128 | "tr8", "tr9", "tr10", "tr11", "tr12", "tr13", "tr14", "tr15" | |
3129 | }; | |
7803799a UW |
3130 | const struct tdesc_feature *feature; |
3131 | int i, valid_p = 1; | |
3132 | ||
3133 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.core"); | |
3134 | if (feature == NULL) | |
3135 | return NULL; | |
3136 | ||
3137 | tdesc_data = tdesc_data_alloc (); | |
3138 | ||
3139 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3140 | S390_PSWM_REGNUM, "pswm"); | |
3141 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3142 | S390_PSWA_REGNUM, "pswa"); | |
3143 | ||
3144 | if (tdesc_unnumbered_register (feature, "r0")) | |
3145 | { | |
3146 | for (i = 0; i < 16; i++) | |
3147 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3148 | S390_R0_REGNUM + i, gprs[i]); | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | have_upper = 1; | |
3153 | ||
3154 | for (i = 0; i < 16; i++) | |
3155 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3156 | S390_R0_REGNUM + i, | |
3157 | gprs_lower[i]); | |
3158 | for (i = 0; i < 16; i++) | |
3159 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3160 | S390_R0_UPPER_REGNUM + i, | |
3161 | gprs_upper[i]); | |
3162 | } | |
3163 | ||
3164 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.fpr"); | |
3165 | if (feature == NULL) | |
3166 | { | |
3167 | tdesc_data_cleanup (tdesc_data); | |
3168 | return NULL; | |
3169 | } | |
3170 | ||
3171 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3172 | S390_FPC_REGNUM, "fpc"); | |
3173 | for (i = 0; i < 16; i++) | |
3174 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3175 | S390_F0_REGNUM + i, fprs[i]); | |
5769d3cd | 3176 | |
7803799a UW |
3177 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.acr"); |
3178 | if (feature == NULL) | |
3179 | { | |
3180 | tdesc_data_cleanup (tdesc_data); | |
3181 | return NULL; | |
3182 | } | |
3183 | ||
3184 | for (i = 0; i < 16; i++) | |
3185 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3186 | S390_A0_REGNUM + i, acrs[i]); | |
3187 | ||
94eae614 | 3188 | /* Optional GNU/Linux-specific "registers". */ |
c642a434 UW |
3189 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.linux"); |
3190 | if (feature) | |
3191 | { | |
3192 | tdesc_numbered_register (feature, tdesc_data, | |
3193 | S390_ORIG_R2_REGNUM, "orig_r2"); | |
3194 | ||
3195 | if (tdesc_numbered_register (feature, tdesc_data, | |
3196 | S390_LAST_BREAK_REGNUM, "last_break")) | |
3197 | have_linux_v1 = 1; | |
3198 | ||
3199 | if (tdesc_numbered_register (feature, tdesc_data, | |
3200 | S390_SYSTEM_CALL_REGNUM, "system_call")) | |
3201 | have_linux_v2 = 1; | |
3202 | ||
3203 | if (have_linux_v2 > have_linux_v1) | |
3204 | valid_p = 0; | |
3205 | } | |
3206 | ||
4ac33720 UW |
3207 | /* Transaction diagnostic block. */ |
3208 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.s390.tdb"); | |
3209 | if (feature) | |
3210 | { | |
3211 | for (i = 0; i < ARRAY_SIZE (tdb_regs); i++) | |
3212 | valid_p &= tdesc_numbered_register (feature, tdesc_data, | |
3213 | S390_TDB_DWORD0_REGNUM + i, | |
3214 | tdb_regs[i]); | |
3215 | } | |
3216 | ||
7803799a UW |
3217 | if (!valid_p) |
3218 | { | |
3219 | tdesc_data_cleanup (tdesc_data); | |
3220 | return NULL; | |
3221 | } | |
3222 | } | |
5769d3cd | 3223 | |
7803799a UW |
3224 | /* Find a candidate among extant architectures. */ |
3225 | for (arches = gdbarch_list_lookup_by_info (arches, &info); | |
3226 | arches != NULL; | |
3227 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
3228 | { | |
3229 | tdep = gdbarch_tdep (arches->gdbarch); | |
3230 | if (!tdep) | |
3231 | continue; | |
3232 | if (tdep->abi != tdep_abi) | |
3233 | continue; | |
3234 | if ((tdep->gpr_full_regnum != -1) != have_upper) | |
3235 | continue; | |
3236 | if (tdesc_data != NULL) | |
3237 | tdesc_data_cleanup (tdesc_data); | |
3238 | return arches->gdbarch; | |
3239 | } | |
5769d3cd | 3240 | |
7803799a | 3241 | /* Otherwise create a new gdbarch for the specified machine type. */ |
fc270c35 | 3242 | tdep = XCNEW (struct gdbarch_tdep); |
7803799a | 3243 | tdep->abi = tdep_abi; |
d0f54f9d | 3244 | gdbarch = gdbarch_alloc (&info, tdep); |
5769d3cd AC |
3245 | |
3246 | set_gdbarch_believe_pcc_promotion (gdbarch, 0); | |
4e409299 | 3247 | set_gdbarch_char_signed (gdbarch, 0); |
5769d3cd | 3248 | |
1de90795 UW |
3249 | /* S/390 GNU/Linux uses either 64-bit or 128-bit long doubles. |
3250 | We can safely let them default to 128-bit, since the debug info | |
3251 | will give the size of type actually used in each case. */ | |
3252 | set_gdbarch_long_double_bit (gdbarch, 128); | |
3253 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); | |
3254 | ||
aaab4dba | 3255 | /* Amount PC must be decremented by after a breakpoint. This is |
3b3b875c | 3256 | often the number of bytes returned by gdbarch_breakpoint_from_pc but not |
aaab4dba | 3257 | always. */ |
5769d3cd | 3258 | set_gdbarch_decr_pc_after_break (gdbarch, 2); |
5769d3cd AC |
3259 | /* Stack grows downward. */ |
3260 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
5769d3cd AC |
3261 | set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc); |
3262 | set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue); | |
d0f54f9d | 3263 | set_gdbarch_in_function_epilogue_p (gdbarch, s390_in_function_epilogue_p); |
a8c99f38 | 3264 | |
7803799a | 3265 | set_gdbarch_num_regs (gdbarch, S390_NUM_REGS); |
5769d3cd | 3266 | set_gdbarch_sp_regnum (gdbarch, S390_SP_REGNUM); |
d0f54f9d | 3267 | set_gdbarch_fp0_regnum (gdbarch, S390_F0_REGNUM); |
d0f54f9d | 3268 | set_gdbarch_stab_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum); |
d0f54f9d | 3269 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum); |
9acbedc0 | 3270 | set_gdbarch_value_from_register (gdbarch, s390_value_from_register); |
d0f54f9d | 3271 | set_gdbarch_regset_from_core_section (gdbarch, |
34201ae3 | 3272 | s390_regset_from_core_section); |
7803799a | 3273 | set_gdbarch_core_read_description (gdbarch, s390_core_read_description); |
c642a434 UW |
3274 | set_gdbarch_cannot_store_register (gdbarch, s390_cannot_store_register); |
3275 | set_gdbarch_write_pc (gdbarch, s390_write_pc); | |
7803799a UW |
3276 | set_gdbarch_pseudo_register_read (gdbarch, s390_pseudo_register_read); |
3277 | set_gdbarch_pseudo_register_write (gdbarch, s390_pseudo_register_write); | |
3278 | set_tdesc_pseudo_register_name (gdbarch, s390_pseudo_register_name); | |
3279 | set_tdesc_pseudo_register_type (gdbarch, s390_pseudo_register_type); | |
3280 | set_tdesc_pseudo_register_reggroup_p (gdbarch, | |
34201ae3 | 3281 | s390_pseudo_register_reggroup_p); |
7803799a UW |
3282 | tdesc_use_registers (gdbarch, tdesc, tdesc_data); |
3283 | ||
3284 | /* Assign pseudo register numbers. */ | |
3285 | first_pseudo_reg = gdbarch_num_regs (gdbarch); | |
3286 | last_pseudo_reg = first_pseudo_reg; | |
3287 | tdep->gpr_full_regnum = -1; | |
3288 | if (have_upper) | |
3289 | { | |
3290 | tdep->gpr_full_regnum = last_pseudo_reg; | |
3291 | last_pseudo_reg += 16; | |
3292 | } | |
3293 | tdep->pc_regnum = last_pseudo_reg++; | |
3294 | tdep->cc_regnum = last_pseudo_reg++; | |
3295 | set_gdbarch_pc_regnum (gdbarch, tdep->pc_regnum); | |
3296 | set_gdbarch_num_pseudo_regs (gdbarch, last_pseudo_reg - first_pseudo_reg); | |
5769d3cd | 3297 | |
b0cf273e JB |
3298 | /* Inferior function calls. */ |
3299 | set_gdbarch_push_dummy_call (gdbarch, s390_push_dummy_call); | |
f089c433 | 3300 | set_gdbarch_dummy_id (gdbarch, s390_dummy_id); |
4074e13c | 3301 | set_gdbarch_frame_align (gdbarch, s390_frame_align); |
b0cf273e | 3302 | set_gdbarch_return_value (gdbarch, s390_return_value); |
5769d3cd | 3303 | |
237b092b AA |
3304 | /* Syscall handling. */ |
3305 | set_gdbarch_get_syscall_number (gdbarch, s390_linux_get_syscall_number); | |
3306 | ||
a8c99f38 | 3307 | /* Frame handling. */ |
a431654a | 3308 | dwarf2_frame_set_init_reg (gdbarch, s390_dwarf2_frame_init_reg); |
7803799a | 3309 | dwarf2_frame_set_adjust_regnum (gdbarch, s390_adjust_frame_regnum); |
f089c433 | 3310 | dwarf2_append_unwinders (gdbarch); |
a431654a | 3311 | frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer); |
f089c433 UW |
3312 | frame_unwind_append_unwinder (gdbarch, &s390_stub_frame_unwind); |
3313 | frame_unwind_append_unwinder (gdbarch, &s390_sigtramp_frame_unwind); | |
3314 | frame_unwind_append_unwinder (gdbarch, &s390_frame_unwind); | |
a8c99f38 JB |
3315 | frame_base_set_default (gdbarch, &s390_frame_base); |
3316 | set_gdbarch_unwind_pc (gdbarch, s390_unwind_pc); | |
3317 | set_gdbarch_unwind_sp (gdbarch, s390_unwind_sp); | |
3318 | ||
1db4e8a0 UW |
3319 | /* Displaced stepping. */ |
3320 | set_gdbarch_displaced_step_copy_insn (gdbarch, | |
34201ae3 | 3321 | simple_displaced_step_copy_insn); |
1db4e8a0 UW |
3322 | set_gdbarch_displaced_step_fixup (gdbarch, s390_displaced_step_fixup); |
3323 | set_gdbarch_displaced_step_free_closure (gdbarch, | |
34201ae3 | 3324 | simple_displaced_step_free_closure); |
1db4e8a0 | 3325 | set_gdbarch_displaced_step_location (gdbarch, |
34201ae3 | 3326 | displaced_step_at_entry_point); |
1db4e8a0 UW |
3327 | set_gdbarch_max_insn_length (gdbarch, S390_MAX_INSTR_SIZE); |
3328 | ||
70728992 PA |
3329 | /* Note that GNU/Linux is the only OS supported on this |
3330 | platform. */ | |
3331 | linux_init_abi (info, gdbarch); | |
3332 | ||
7803799a | 3333 | switch (tdep->abi) |
5769d3cd | 3334 | { |
7803799a | 3335 | case ABI_LINUX_S390: |
d0f54f9d JB |
3336 | tdep->gregset = &s390_gregset; |
3337 | tdep->sizeof_gregset = s390_sizeof_gregset; | |
3338 | tdep->fpregset = &s390_fpregset; | |
3339 | tdep->sizeof_fpregset = s390_sizeof_fpregset; | |
5769d3cd AC |
3340 | |
3341 | set_gdbarch_addr_bits_remove (gdbarch, s390_addr_bits_remove); | |
76a9d10f MK |
3342 | set_solib_svr4_fetch_link_map_offsets |
3343 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
c642a434 | 3344 | |
237b092b AA |
3345 | set_xml_syscall_file_name (XML_SYSCALL_FILENAME_S390); |
3346 | ||
c642a434 UW |
3347 | if (have_upper) |
3348 | { | |
3349 | if (have_linux_v2) | |
3350 | set_gdbarch_core_regset_sections (gdbarch, | |
3351 | s390_linux64v2_regset_sections); | |
3352 | else if (have_linux_v1) | |
3353 | set_gdbarch_core_regset_sections (gdbarch, | |
3354 | s390_linux64v1_regset_sections); | |
3355 | else | |
3356 | set_gdbarch_core_regset_sections (gdbarch, | |
3357 | s390_linux64_regset_sections); | |
3358 | } | |
3359 | else | |
3360 | { | |
3361 | if (have_linux_v2) | |
3362 | set_gdbarch_core_regset_sections (gdbarch, | |
3363 | s390_linux32v2_regset_sections); | |
3364 | else if (have_linux_v1) | |
3365 | set_gdbarch_core_regset_sections (gdbarch, | |
3366 | s390_linux32v1_regset_sections); | |
3367 | else | |
3368 | set_gdbarch_core_regset_sections (gdbarch, | |
3369 | s390_linux32_regset_sections); | |
3370 | } | |
5769d3cd | 3371 | break; |
b0cf273e | 3372 | |
7803799a | 3373 | case ABI_LINUX_ZSERIES: |
d0f54f9d JB |
3374 | tdep->gregset = &s390x_gregset; |
3375 | tdep->sizeof_gregset = s390x_sizeof_gregset; | |
3376 | tdep->fpregset = &s390_fpregset; | |
3377 | tdep->sizeof_fpregset = s390_sizeof_fpregset; | |
5769d3cd AC |
3378 | |
3379 | set_gdbarch_long_bit (gdbarch, 64); | |
3380 | set_gdbarch_long_long_bit (gdbarch, 64); | |
3381 | set_gdbarch_ptr_bit (gdbarch, 64); | |
76a9d10f MK |
3382 | set_solib_svr4_fetch_link_map_offsets |
3383 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
ffc65945 | 3384 | set_gdbarch_address_class_type_flags (gdbarch, |
34201ae3 | 3385 | s390_address_class_type_flags); |
ffc65945 | 3386 | set_gdbarch_address_class_type_flags_to_name (gdbarch, |
34201ae3 | 3387 | s390_address_class_type_flags_to_name); |
ffc65945 | 3388 | set_gdbarch_address_class_name_to_type_flags (gdbarch, |
34201ae3 | 3389 | s390_address_class_name_to_type_flags); |
c642a434 | 3390 | |
237b092b AA |
3391 | set_xml_syscall_file_name (XML_SYSCALL_FILENAME_S390); |
3392 | ||
c642a434 UW |
3393 | if (have_linux_v2) |
3394 | set_gdbarch_core_regset_sections (gdbarch, | |
3395 | s390x_linux64v2_regset_sections); | |
3396 | else if (have_linux_v1) | |
3397 | set_gdbarch_core_regset_sections (gdbarch, | |
3398 | s390x_linux64v1_regset_sections); | |
3399 | else | |
3400 | set_gdbarch_core_regset_sections (gdbarch, | |
3401 | s390x_linux64_regset_sections); | |
5769d3cd AC |
3402 | break; |
3403 | } | |
3404 | ||
36482093 AC |
3405 | set_gdbarch_print_insn (gdbarch, print_insn_s390); |
3406 | ||
982e9687 UW |
3407 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
3408 | ||
b2756930 KB |
3409 | /* Enable TLS support. */ |
3410 | set_gdbarch_fetch_tls_load_module_address (gdbarch, | |
34201ae3 | 3411 | svr4_fetch_objfile_link_map); |
b2756930 | 3412 | |
1dd635ac UW |
3413 | set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |
3414 | ||
55aa24fb | 3415 | /* SystemTap functions. */ |
05c0465e SDJ |
3416 | set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes); |
3417 | set_gdbarch_stap_register_indirection_prefixes (gdbarch, | |
3418 | stap_register_indirection_prefixes); | |
3419 | set_gdbarch_stap_register_indirection_suffixes (gdbarch, | |
3420 | stap_register_indirection_suffixes); | |
55aa24fb SDJ |
3421 | set_gdbarch_stap_is_single_operand (gdbarch, s390_stap_is_single_operand); |
3422 | ||
5769d3cd AC |
3423 | return gdbarch; |
3424 | } | |
3425 | ||
3426 | ||
a78f21af AC |
3427 | extern initialize_file_ftype _initialize_s390_tdep; /* -Wmissing-prototypes */ |
3428 | ||
5769d3cd | 3429 | void |
5ae5f592 | 3430 | _initialize_s390_tdep (void) |
5769d3cd | 3431 | { |
5769d3cd AC |
3432 | /* Hook us into the gdbarch mechanism. */ |
3433 | register_gdbarch_init (bfd_arch_s390, s390_gdbarch_init); | |
7803799a | 3434 | |
94eae614 | 3435 | /* Initialize the GNU/Linux target descriptions. */ |
7803799a | 3436 | initialize_tdesc_s390_linux32 (); |
c642a434 UW |
3437 | initialize_tdesc_s390_linux32v1 (); |
3438 | initialize_tdesc_s390_linux32v2 (); | |
7803799a | 3439 | initialize_tdesc_s390_linux64 (); |
c642a434 UW |
3440 | initialize_tdesc_s390_linux64v1 (); |
3441 | initialize_tdesc_s390_linux64v2 (); | |
4ac33720 | 3442 | initialize_tdesc_s390_te_linux64 (); |
7803799a | 3443 | initialize_tdesc_s390x_linux64 (); |
c642a434 UW |
3444 | initialize_tdesc_s390x_linux64v1 (); |
3445 | initialize_tdesc_s390x_linux64v2 (); | |
4ac33720 | 3446 | initialize_tdesc_s390x_te_linux64 (); |
5769d3cd | 3447 | } |