Commit | Line | Data |
---|---|---|
5769d3cd | 1 | /* Target-dependent code for GDB, the GNU debugger. |
ca557f44 | 2 | |
6aba47ca | 3 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
469db033 | 4 | Free Software Foundation, Inc. |
ca557f44 | 5 | |
5769d3cd AC |
6 | Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) |
7 | for IBM Deutschland Entwicklung GmbH, IBM Corporation. | |
8 | ||
9 | This file is part of GDB. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | Boston, MA 02110-1301, USA. */ | |
5769d3cd | 25 | |
d0f54f9d | 26 | #include "defs.h" |
5769d3cd AC |
27 | #include "arch-utils.h" |
28 | #include "frame.h" | |
29 | #include "inferior.h" | |
30 | #include "symtab.h" | |
31 | #include "target.h" | |
32 | #include "gdbcore.h" | |
33 | #include "gdbcmd.h" | |
5769d3cd | 34 | #include "objfiles.h" |
5769d3cd AC |
35 | #include "floatformat.h" |
36 | #include "regcache.h" | |
a8c99f38 JB |
37 | #include "trad-frame.h" |
38 | #include "frame-base.h" | |
39 | #include "frame-unwind.h" | |
a431654a | 40 | #include "dwarf2-frame.h" |
d0f54f9d JB |
41 | #include "reggroups.h" |
42 | #include "regset.h" | |
fd0407d6 | 43 | #include "value.h" |
78f8b424 | 44 | #include "gdb_assert.h" |
a89aa300 | 45 | #include "dis-asm.h" |
76a9d10f | 46 | #include "solib-svr4.h" |
3fc46200 | 47 | #include "prologue-value.h" |
5769d3cd | 48 | |
d0f54f9d | 49 | #include "s390-tdep.h" |
5769d3cd | 50 | |
60e6cc42 | 51 | |
d0f54f9d JB |
52 | /* The tdep structure. */ |
53 | ||
54 | struct gdbarch_tdep | |
5769d3cd | 55 | { |
b0cf273e JB |
56 | /* ABI version. */ |
57 | enum { ABI_LINUX_S390, ABI_LINUX_ZSERIES } abi; | |
58 | ||
d0f54f9d JB |
59 | /* Core file register sets. */ |
60 | const struct regset *gregset; | |
61 | int sizeof_gregset; | |
62 | ||
63 | const struct regset *fpregset; | |
64 | int sizeof_fpregset; | |
65 | }; | |
66 | ||
67 | ||
d0f54f9d JB |
68 | /* Return the name of register REGNUM. */ |
69 | static const char * | |
70 | s390_register_name (int regnum) | |
71 | { | |
6707b003 UW |
72 | static const char *register_names[S390_NUM_TOTAL_REGS] = |
73 | { | |
74 | /* Program Status Word. */ | |
75 | "pswm", "pswa", | |
76 | /* General Purpose Registers. */ | |
77 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
78 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
79 | /* Access Registers. */ | |
80 | "acr0", "acr1", "acr2", "acr3", "acr4", "acr5", "acr6", "acr7", | |
81 | "acr8", "acr9", "acr10", "acr11", "acr12", "acr13", "acr14", "acr15", | |
82 | /* Floating Point Control Word. */ | |
83 | "fpc", | |
84 | /* Floating Point Registers. */ | |
85 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", | |
86 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", | |
87 | /* Pseudo registers. */ | |
88 | "pc", "cc", | |
89 | }; | |
90 | ||
d0f54f9d | 91 | gdb_assert (regnum >= 0 && regnum < S390_NUM_TOTAL_REGS); |
6707b003 | 92 | return register_names[regnum]; |
d0f54f9d JB |
93 | } |
94 | ||
95 | /* Return the GDB type object for the "standard" data type of data in | |
6707b003 | 96 | register REGNUM. */ |
d0f54f9d JB |
97 | static struct type * |
98 | s390_register_type (struct gdbarch *gdbarch, int regnum) | |
99 | { | |
6707b003 UW |
100 | if (regnum == S390_PSWM_REGNUM || regnum == S390_PSWA_REGNUM) |
101 | return builtin_type_long; | |
102 | if (regnum >= S390_R0_REGNUM && regnum <= S390_R15_REGNUM) | |
103 | return builtin_type_long; | |
104 | if (regnum >= S390_A0_REGNUM && regnum <= S390_A15_REGNUM) | |
105 | return builtin_type_int; | |
106 | if (regnum == S390_FPC_REGNUM) | |
107 | return builtin_type_int; | |
108 | if (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM) | |
109 | return builtin_type_double; | |
110 | if (regnum == S390_PC_REGNUM) | |
111 | return builtin_type_void_func_ptr; | |
112 | if (regnum == S390_CC_REGNUM) | |
113 | return builtin_type_int; | |
114 | ||
115 | internal_error (__FILE__, __LINE__, _("invalid regnum")); | |
5769d3cd AC |
116 | } |
117 | ||
d0f54f9d JB |
118 | /* DWARF Register Mapping. */ |
119 | ||
120 | static int s390_dwarf_regmap[] = | |
121 | { | |
122 | /* General Purpose Registers. */ | |
123 | S390_R0_REGNUM, S390_R1_REGNUM, S390_R2_REGNUM, S390_R3_REGNUM, | |
124 | S390_R4_REGNUM, S390_R5_REGNUM, S390_R6_REGNUM, S390_R7_REGNUM, | |
125 | S390_R8_REGNUM, S390_R9_REGNUM, S390_R10_REGNUM, S390_R11_REGNUM, | |
126 | S390_R12_REGNUM, S390_R13_REGNUM, S390_R14_REGNUM, S390_R15_REGNUM, | |
127 | ||
128 | /* Floating Point Registers. */ | |
129 | S390_F0_REGNUM, S390_F2_REGNUM, S390_F4_REGNUM, S390_F6_REGNUM, | |
130 | S390_F1_REGNUM, S390_F3_REGNUM, S390_F5_REGNUM, S390_F7_REGNUM, | |
131 | S390_F8_REGNUM, S390_F10_REGNUM, S390_F12_REGNUM, S390_F14_REGNUM, | |
132 | S390_F9_REGNUM, S390_F11_REGNUM, S390_F13_REGNUM, S390_F15_REGNUM, | |
133 | ||
134 | /* Control Registers (not mapped). */ | |
135 | -1, -1, -1, -1, -1, -1, -1, -1, | |
136 | -1, -1, -1, -1, -1, -1, -1, -1, | |
137 | ||
138 | /* Access Registers. */ | |
139 | S390_A0_REGNUM, S390_A1_REGNUM, S390_A2_REGNUM, S390_A3_REGNUM, | |
140 | S390_A4_REGNUM, S390_A5_REGNUM, S390_A6_REGNUM, S390_A7_REGNUM, | |
141 | S390_A8_REGNUM, S390_A9_REGNUM, S390_A10_REGNUM, S390_A11_REGNUM, | |
142 | S390_A12_REGNUM, S390_A13_REGNUM, S390_A14_REGNUM, S390_A15_REGNUM, | |
143 | ||
144 | /* Program Status Word. */ | |
145 | S390_PSWM_REGNUM, | |
146 | S390_PSWA_REGNUM | |
147 | }; | |
148 | ||
149 | /* Convert DWARF register number REG to the appropriate register | |
150 | number used by GDB. */ | |
a78f21af | 151 | static int |
d0f54f9d JB |
152 | s390_dwarf_reg_to_regnum (int reg) |
153 | { | |
154 | int regnum = -1; | |
155 | ||
16aff9a6 | 156 | if (reg >= 0 && reg < ARRAY_SIZE (s390_dwarf_regmap)) |
d0f54f9d JB |
157 | regnum = s390_dwarf_regmap[reg]; |
158 | ||
159 | if (regnum == -1) | |
8a3fe4f8 | 160 | warning (_("Unmapped DWARF Register #%d encountered."), reg); |
d0f54f9d JB |
161 | |
162 | return regnum; | |
163 | } | |
164 | ||
165 | /* Pseudo registers - PC and condition code. */ | |
166 | ||
167 | static void | |
168 | s390_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, | |
2e82d168 | 169 | int regnum, gdb_byte *buf) |
d0f54f9d JB |
170 | { |
171 | ULONGEST val; | |
172 | ||
173 | switch (regnum) | |
174 | { | |
175 | case S390_PC_REGNUM: | |
176 | regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &val); | |
177 | store_unsigned_integer (buf, 4, val & 0x7fffffff); | |
178 | break; | |
179 | ||
180 | case S390_CC_REGNUM: | |
181 | regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val); | |
182 | store_unsigned_integer (buf, 4, (val >> 12) & 3); | |
183 | break; | |
184 | ||
185 | default: | |
e2e0b3e5 | 186 | internal_error (__FILE__, __LINE__, _("invalid regnum")); |
d0f54f9d JB |
187 | } |
188 | } | |
189 | ||
190 | static void | |
191 | s390_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
2e82d168 | 192 | int regnum, const gdb_byte *buf) |
5769d3cd | 193 | { |
d0f54f9d JB |
194 | ULONGEST val, psw; |
195 | ||
196 | switch (regnum) | |
197 | { | |
198 | case S390_PC_REGNUM: | |
199 | val = extract_unsigned_integer (buf, 4); | |
200 | regcache_raw_read_unsigned (regcache, S390_PSWA_REGNUM, &psw); | |
201 | psw = (psw & 0x80000000) | (val & 0x7fffffff); | |
202 | regcache_raw_write_unsigned (regcache, S390_PSWA_REGNUM, psw); | |
203 | break; | |
204 | ||
205 | case S390_CC_REGNUM: | |
206 | val = extract_unsigned_integer (buf, 4); | |
207 | regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw); | |
208 | psw = (psw & ~((ULONGEST)3 << 12)) | ((val & 3) << 12); | |
209 | regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, psw); | |
210 | break; | |
211 | ||
212 | default: | |
e2e0b3e5 | 213 | internal_error (__FILE__, __LINE__, _("invalid regnum")); |
d0f54f9d | 214 | } |
5769d3cd AC |
215 | } |
216 | ||
d0f54f9d JB |
217 | static void |
218 | s390x_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, | |
2e82d168 | 219 | int regnum, gdb_byte *buf) |
d0f54f9d JB |
220 | { |
221 | ULONGEST val; | |
222 | ||
223 | switch (regnum) | |
224 | { | |
225 | case S390_PC_REGNUM: | |
226 | regcache_raw_read (regcache, S390_PSWA_REGNUM, buf); | |
227 | break; | |
228 | ||
229 | case S390_CC_REGNUM: | |
230 | regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &val); | |
231 | store_unsigned_integer (buf, 4, (val >> 44) & 3); | |
232 | break; | |
233 | ||
234 | default: | |
e2e0b3e5 | 235 | internal_error (__FILE__, __LINE__, _("invalid regnum")); |
d0f54f9d JB |
236 | } |
237 | } | |
238 | ||
239 | static void | |
240 | s390x_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
2e82d168 | 241 | int regnum, const gdb_byte *buf) |
d0f54f9d JB |
242 | { |
243 | ULONGEST val, psw; | |
244 | ||
245 | switch (regnum) | |
246 | { | |
247 | case S390_PC_REGNUM: | |
248 | regcache_raw_write (regcache, S390_PSWA_REGNUM, buf); | |
249 | break; | |
250 | ||
251 | case S390_CC_REGNUM: | |
252 | val = extract_unsigned_integer (buf, 4); | |
253 | regcache_raw_read_unsigned (regcache, S390_PSWM_REGNUM, &psw); | |
254 | psw = (psw & ~((ULONGEST)3 << 44)) | ((val & 3) << 44); | |
255 | regcache_raw_write_unsigned (regcache, S390_PSWM_REGNUM, psw); | |
256 | break; | |
257 | ||
258 | default: | |
e2e0b3e5 | 259 | internal_error (__FILE__, __LINE__, _("invalid regnum")); |
d0f54f9d JB |
260 | } |
261 | } | |
262 | ||
263 | /* 'float' values are stored in the upper half of floating-point | |
264 | registers, even though we are otherwise a big-endian platform. */ | |
265 | ||
9acbedc0 UW |
266 | static struct value * |
267 | s390_value_from_register (struct type *type, int regnum, | |
268 | struct frame_info *frame) | |
d0f54f9d | 269 | { |
9acbedc0 UW |
270 | struct value *value = default_value_from_register (type, regnum, frame); |
271 | int len = TYPE_LENGTH (type); | |
d0f54f9d | 272 | |
9acbedc0 UW |
273 | if (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM && len < 8) |
274 | set_value_offset (value, 0); | |
d0f54f9d | 275 | |
9acbedc0 | 276 | return value; |
d0f54f9d JB |
277 | } |
278 | ||
279 | /* Register groups. */ | |
280 | ||
a78f21af | 281 | static int |
d0f54f9d JB |
282 | s390_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
283 | struct reggroup *group) | |
284 | { | |
285 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
286 | ||
287 | /* Registers displayed via 'info regs'. */ | |
288 | if (group == general_reggroup) | |
289 | return (regnum >= S390_R0_REGNUM && regnum <= S390_R15_REGNUM) | |
290 | || regnum == S390_PC_REGNUM | |
291 | || regnum == S390_CC_REGNUM; | |
292 | ||
293 | /* Registers displayed via 'info float'. */ | |
294 | if (group == float_reggroup) | |
295 | return (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM) | |
296 | || regnum == S390_FPC_REGNUM; | |
297 | ||
298 | /* Registers that need to be saved/restored in order to | |
299 | push or pop frames. */ | |
300 | if (group == save_reggroup || group == restore_reggroup) | |
301 | return regnum != S390_PSWM_REGNUM && regnum != S390_PSWA_REGNUM; | |
302 | ||
303 | return default_register_reggroup_p (gdbarch, regnum, group); | |
304 | } | |
305 | ||
306 | ||
307 | /* Core file register sets. */ | |
308 | ||
309 | int s390_regmap_gregset[S390_NUM_REGS] = | |
310 | { | |
311 | /* Program Status Word. */ | |
312 | 0x00, 0x04, | |
313 | /* General Purpose Registers. */ | |
314 | 0x08, 0x0c, 0x10, 0x14, | |
315 | 0x18, 0x1c, 0x20, 0x24, | |
316 | 0x28, 0x2c, 0x30, 0x34, | |
317 | 0x38, 0x3c, 0x40, 0x44, | |
318 | /* Access Registers. */ | |
319 | 0x48, 0x4c, 0x50, 0x54, | |
320 | 0x58, 0x5c, 0x60, 0x64, | |
321 | 0x68, 0x6c, 0x70, 0x74, | |
322 | 0x78, 0x7c, 0x80, 0x84, | |
323 | /* Floating Point Control Word. */ | |
324 | -1, | |
325 | /* Floating Point Registers. */ | |
326 | -1, -1, -1, -1, -1, -1, -1, -1, | |
327 | -1, -1, -1, -1, -1, -1, -1, -1, | |
328 | }; | |
329 | ||
330 | int s390x_regmap_gregset[S390_NUM_REGS] = | |
331 | { | |
332 | 0x00, 0x08, | |
333 | /* General Purpose Registers. */ | |
334 | 0x10, 0x18, 0x20, 0x28, | |
335 | 0x30, 0x38, 0x40, 0x48, | |
336 | 0x50, 0x58, 0x60, 0x68, | |
337 | 0x70, 0x78, 0x80, 0x88, | |
338 | /* Access Registers. */ | |
339 | 0x90, 0x94, 0x98, 0x9c, | |
340 | 0xa0, 0xa4, 0xa8, 0xac, | |
341 | 0xb0, 0xb4, 0xb8, 0xbc, | |
342 | 0xc0, 0xc4, 0xc8, 0xcc, | |
343 | /* Floating Point Control Word. */ | |
344 | -1, | |
345 | /* Floating Point Registers. */ | |
346 | -1, -1, -1, -1, -1, -1, -1, -1, | |
347 | -1, -1, -1, -1, -1, -1, -1, -1, | |
348 | }; | |
349 | ||
350 | int s390_regmap_fpregset[S390_NUM_REGS] = | |
351 | { | |
352 | /* Program Status Word. */ | |
353 | -1, -1, | |
354 | /* General Purpose Registers. */ | |
355 | -1, -1, -1, -1, -1, -1, -1, -1, | |
356 | -1, -1, -1, -1, -1, -1, -1, -1, | |
357 | /* Access Registers. */ | |
358 | -1, -1, -1, -1, -1, -1, -1, -1, | |
359 | -1, -1, -1, -1, -1, -1, -1, -1, | |
360 | /* Floating Point Control Word. */ | |
361 | 0x00, | |
362 | /* Floating Point Registers. */ | |
363 | 0x08, 0x10, 0x18, 0x20, | |
364 | 0x28, 0x30, 0x38, 0x40, | |
365 | 0x48, 0x50, 0x58, 0x60, | |
366 | 0x68, 0x70, 0x78, 0x80, | |
367 | }; | |
368 | ||
369 | /* Supply register REGNUM from the register set REGSET to register cache | |
370 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
371 | static void | |
372 | s390_supply_regset (const struct regset *regset, struct regcache *regcache, | |
373 | int regnum, const void *regs, size_t len) | |
374 | { | |
375 | const int *offset = regset->descr; | |
376 | int i; | |
377 | ||
378 | for (i = 0; i < S390_NUM_REGS; i++) | |
379 | { | |
380 | if ((regnum == i || regnum == -1) && offset[i] != -1) | |
381 | regcache_raw_supply (regcache, i, (const char *)regs + offset[i]); | |
382 | } | |
383 | } | |
384 | ||
92f38ec2 UW |
385 | /* Collect register REGNUM from the register cache REGCACHE and store |
386 | it in the buffer specified by REGS and LEN as described by the | |
387 | general-purpose register set REGSET. If REGNUM is -1, do this for | |
388 | all registers in REGSET. */ | |
389 | static void | |
390 | s390_collect_regset (const struct regset *regset, | |
391 | const struct regcache *regcache, | |
392 | int regnum, void *regs, size_t len) | |
393 | { | |
394 | const int *offset = regset->descr; | |
395 | int i; | |
396 | ||
397 | for (i = 0; i < S390_NUM_REGS; i++) | |
398 | { | |
399 | if ((regnum == i || regnum == -1) && offset[i] != -1) | |
400 | regcache_raw_collect (regcache, i, (char *)regs + offset[i]); | |
401 | } | |
402 | } | |
403 | ||
d0f54f9d JB |
404 | static const struct regset s390_gregset = { |
405 | s390_regmap_gregset, | |
92f38ec2 UW |
406 | s390_supply_regset, |
407 | s390_collect_regset | |
d0f54f9d JB |
408 | }; |
409 | ||
410 | static const struct regset s390x_gregset = { | |
411 | s390x_regmap_gregset, | |
92f38ec2 UW |
412 | s390_supply_regset, |
413 | s390_collect_regset | |
d0f54f9d JB |
414 | }; |
415 | ||
416 | static const struct regset s390_fpregset = { | |
417 | s390_regmap_fpregset, | |
92f38ec2 UW |
418 | s390_supply_regset, |
419 | s390_collect_regset | |
d0f54f9d JB |
420 | }; |
421 | ||
422 | /* Return the appropriate register set for the core section identified | |
423 | by SECT_NAME and SECT_SIZE. */ | |
424 | const struct regset * | |
425 | s390_regset_from_core_section (struct gdbarch *gdbarch, | |
426 | const char *sect_name, size_t sect_size) | |
427 | { | |
428 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
429 | ||
430 | if (strcmp (sect_name, ".reg") == 0 && sect_size == tdep->sizeof_gregset) | |
431 | return tdep->gregset; | |
432 | ||
433 | if (strcmp (sect_name, ".reg2") == 0 && sect_size == tdep->sizeof_fpregset) | |
434 | return tdep->fpregset; | |
435 | ||
436 | return NULL; | |
5769d3cd AC |
437 | } |
438 | ||
d0f54f9d | 439 | |
4bc8c588 JB |
440 | /* Decoding S/390 instructions. */ |
441 | ||
442 | /* Named opcode values for the S/390 instructions we recognize. Some | |
443 | instructions have their opcode split across two fields; those are the | |
444 | op1_* and op2_* enums. */ | |
445 | enum | |
446 | { | |
a8c99f38 JB |
447 | op1_lhi = 0xa7, op2_lhi = 0x08, |
448 | op1_lghi = 0xa7, op2_lghi = 0x09, | |
00ce08ef | 449 | op1_lgfi = 0xc0, op2_lgfi = 0x01, |
4bc8c588 | 450 | op_lr = 0x18, |
a8c99f38 JB |
451 | op_lgr = 0xb904, |
452 | op_l = 0x58, | |
453 | op1_ly = 0xe3, op2_ly = 0x58, | |
454 | op1_lg = 0xe3, op2_lg = 0x04, | |
455 | op_lm = 0x98, | |
456 | op1_lmy = 0xeb, op2_lmy = 0x98, | |
457 | op1_lmg = 0xeb, op2_lmg = 0x04, | |
4bc8c588 | 458 | op_st = 0x50, |
a8c99f38 | 459 | op1_sty = 0xe3, op2_sty = 0x50, |
4bc8c588 | 460 | op1_stg = 0xe3, op2_stg = 0x24, |
a8c99f38 | 461 | op_std = 0x60, |
4bc8c588 | 462 | op_stm = 0x90, |
a8c99f38 | 463 | op1_stmy = 0xeb, op2_stmy = 0x90, |
4bc8c588 | 464 | op1_stmg = 0xeb, op2_stmg = 0x24, |
a8c99f38 JB |
465 | op1_aghi = 0xa7, op2_aghi = 0x0b, |
466 | op1_ahi = 0xa7, op2_ahi = 0x0a, | |
00ce08ef UW |
467 | op1_agfi = 0xc2, op2_agfi = 0x08, |
468 | op1_afi = 0xc2, op2_afi = 0x09, | |
469 | op1_algfi= 0xc2, op2_algfi= 0x0a, | |
470 | op1_alfi = 0xc2, op2_alfi = 0x0b, | |
a8c99f38 JB |
471 | op_ar = 0x1a, |
472 | op_agr = 0xb908, | |
473 | op_a = 0x5a, | |
474 | op1_ay = 0xe3, op2_ay = 0x5a, | |
475 | op1_ag = 0xe3, op2_ag = 0x08, | |
00ce08ef UW |
476 | op1_slgfi= 0xc2, op2_slgfi= 0x04, |
477 | op1_slfi = 0xc2, op2_slfi = 0x05, | |
a8c99f38 JB |
478 | op_sr = 0x1b, |
479 | op_sgr = 0xb909, | |
480 | op_s = 0x5b, | |
481 | op1_sy = 0xe3, op2_sy = 0x5b, | |
482 | op1_sg = 0xe3, op2_sg = 0x09, | |
483 | op_nr = 0x14, | |
484 | op_ngr = 0xb980, | |
485 | op_la = 0x41, | |
486 | op1_lay = 0xe3, op2_lay = 0x71, | |
487 | op1_larl = 0xc0, op2_larl = 0x00, | |
488 | op_basr = 0x0d, | |
489 | op_bas = 0x4d, | |
490 | op_bcr = 0x07, | |
491 | op_bc = 0x0d, | |
492 | op1_bras = 0xa7, op2_bras = 0x05, | |
493 | op1_brasl= 0xc0, op2_brasl= 0x05, | |
494 | op1_brc = 0xa7, op2_brc = 0x04, | |
495 | op1_brcl = 0xc0, op2_brcl = 0x04, | |
4bc8c588 JB |
496 | }; |
497 | ||
498 | ||
a8c99f38 JB |
499 | /* Read a single instruction from address AT. */ |
500 | ||
501 | #define S390_MAX_INSTR_SIZE 6 | |
502 | static int | |
503 | s390_readinstruction (bfd_byte instr[], CORE_ADDR at) | |
504 | { | |
505 | static int s390_instrlen[] = { 2, 4, 4, 6 }; | |
506 | int instrlen; | |
507 | ||
359a9262 | 508 | if (read_memory_nobpt (at, &instr[0], 2)) |
a8c99f38 JB |
509 | return -1; |
510 | instrlen = s390_instrlen[instr[0] >> 6]; | |
511 | if (instrlen > 2) | |
512 | { | |
359a9262 | 513 | if (read_memory_nobpt (at + 2, &instr[2], instrlen - 2)) |
a8c99f38 JB |
514 | return -1; |
515 | } | |
516 | return instrlen; | |
517 | } | |
518 | ||
519 | ||
4bc8c588 JB |
520 | /* The functions below are for recognizing and decoding S/390 |
521 | instructions of various formats. Each of them checks whether INSN | |
522 | is an instruction of the given format, with the specified opcodes. | |
523 | If it is, it sets the remaining arguments to the values of the | |
524 | instruction's fields, and returns a non-zero value; otherwise, it | |
525 | returns zero. | |
526 | ||
527 | These functions' arguments appear in the order they appear in the | |
528 | instruction, not in the machine-language form. So, opcodes always | |
529 | come first, even though they're sometimes scattered around the | |
530 | instructions. And displacements appear before base and extension | |
531 | registers, as they do in the assembly syntax, not at the end, as | |
532 | they do in the machine language. */ | |
a78f21af | 533 | static int |
4bc8c588 JB |
534 | is_ri (bfd_byte *insn, int op1, int op2, unsigned int *r1, int *i2) |
535 | { | |
536 | if (insn[0] == op1 && (insn[1] & 0xf) == op2) | |
537 | { | |
538 | *r1 = (insn[1] >> 4) & 0xf; | |
539 | /* i2 is a 16-bit signed quantity. */ | |
540 | *i2 = (((insn[2] << 8) | insn[3]) ^ 0x8000) - 0x8000; | |
541 | return 1; | |
542 | } | |
543 | else | |
544 | return 0; | |
545 | } | |
8ac0e65a | 546 | |
5769d3cd | 547 | |
4bc8c588 JB |
548 | static int |
549 | is_ril (bfd_byte *insn, int op1, int op2, | |
550 | unsigned int *r1, int *i2) | |
551 | { | |
552 | if (insn[0] == op1 && (insn[1] & 0xf) == op2) | |
553 | { | |
554 | *r1 = (insn[1] >> 4) & 0xf; | |
555 | /* i2 is a signed quantity. If the host 'int' is 32 bits long, | |
556 | no sign extension is necessary, but we don't want to assume | |
557 | that. */ | |
558 | *i2 = (((insn[2] << 24) | |
559 | | (insn[3] << 16) | |
560 | | (insn[4] << 8) | |
561 | | (insn[5])) ^ 0x80000000) - 0x80000000; | |
562 | return 1; | |
563 | } | |
564 | else | |
565 | return 0; | |
566 | } | |
567 | ||
568 | ||
569 | static int | |
570 | is_rr (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2) | |
571 | { | |
572 | if (insn[0] == op) | |
573 | { | |
574 | *r1 = (insn[1] >> 4) & 0xf; | |
575 | *r2 = insn[1] & 0xf; | |
576 | return 1; | |
577 | } | |
578 | else | |
579 | return 0; | |
580 | } | |
581 | ||
582 | ||
583 | static int | |
584 | is_rre (bfd_byte *insn, int op, unsigned int *r1, unsigned int *r2) | |
585 | { | |
586 | if (((insn[0] << 8) | insn[1]) == op) | |
587 | { | |
588 | /* Yes, insn[3]. insn[2] is unused in RRE format. */ | |
589 | *r1 = (insn[3] >> 4) & 0xf; | |
590 | *r2 = insn[3] & 0xf; | |
591 | return 1; | |
592 | } | |
593 | else | |
594 | return 0; | |
595 | } | |
596 | ||
597 | ||
598 | static int | |
599 | is_rs (bfd_byte *insn, int op, | |
600 | unsigned int *r1, unsigned int *r3, unsigned int *d2, unsigned int *b2) | |
601 | { | |
602 | if (insn[0] == op) | |
603 | { | |
604 | *r1 = (insn[1] >> 4) & 0xf; | |
605 | *r3 = insn[1] & 0xf; | |
606 | *b2 = (insn[2] >> 4) & 0xf; | |
607 | *d2 = ((insn[2] & 0xf) << 8) | insn[3]; | |
608 | return 1; | |
609 | } | |
610 | else | |
611 | return 0; | |
612 | } | |
613 | ||
614 | ||
615 | static int | |
a8c99f38 | 616 | is_rsy (bfd_byte *insn, int op1, int op2, |
4bc8c588 JB |
617 | unsigned int *r1, unsigned int *r3, unsigned int *d2, unsigned int *b2) |
618 | { | |
619 | if (insn[0] == op1 | |
4bc8c588 JB |
620 | && insn[5] == op2) |
621 | { | |
622 | *r1 = (insn[1] >> 4) & 0xf; | |
623 | *r3 = insn[1] & 0xf; | |
624 | *b2 = (insn[2] >> 4) & 0xf; | |
a8c99f38 JB |
625 | /* The 'long displacement' is a 20-bit signed integer. */ |
626 | *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12)) | |
627 | ^ 0x80000) - 0x80000; | |
4bc8c588 JB |
628 | return 1; |
629 | } | |
630 | else | |
631 | return 0; | |
632 | } | |
633 | ||
634 | ||
635 | static int | |
636 | is_rx (bfd_byte *insn, int op, | |
637 | unsigned int *r1, unsigned int *d2, unsigned int *x2, unsigned int *b2) | |
638 | { | |
639 | if (insn[0] == op) | |
640 | { | |
641 | *r1 = (insn[1] >> 4) & 0xf; | |
642 | *x2 = insn[1] & 0xf; | |
643 | *b2 = (insn[2] >> 4) & 0xf; | |
644 | *d2 = ((insn[2] & 0xf) << 8) | insn[3]; | |
645 | return 1; | |
646 | } | |
647 | else | |
648 | return 0; | |
649 | } | |
650 | ||
651 | ||
652 | static int | |
a8c99f38 | 653 | is_rxy (bfd_byte *insn, int op1, int op2, |
4bc8c588 JB |
654 | unsigned int *r1, unsigned int *d2, unsigned int *x2, unsigned int *b2) |
655 | { | |
656 | if (insn[0] == op1 | |
4bc8c588 JB |
657 | && insn[5] == op2) |
658 | { | |
659 | *r1 = (insn[1] >> 4) & 0xf; | |
660 | *x2 = insn[1] & 0xf; | |
661 | *b2 = (insn[2] >> 4) & 0xf; | |
a8c99f38 JB |
662 | /* The 'long displacement' is a 20-bit signed integer. */ |
663 | *d2 = ((((insn[2] & 0xf) << 8) | insn[3] | (insn[4] << 12)) | |
664 | ^ 0x80000) - 0x80000; | |
4bc8c588 JB |
665 | return 1; |
666 | } | |
667 | else | |
668 | return 0; | |
669 | } | |
670 | ||
671 | ||
3fc46200 | 672 | /* Prologue analysis. */ |
4bc8c588 | 673 | |
d0f54f9d JB |
674 | #define S390_NUM_GPRS 16 |
675 | #define S390_NUM_FPRS 16 | |
4bc8c588 | 676 | |
a8c99f38 JB |
677 | struct s390_prologue_data { |
678 | ||
ee1b3323 UW |
679 | /* The stack. */ |
680 | struct pv_area *stack; | |
681 | ||
a8c99f38 JB |
682 | /* The size of a GPR or FPR. */ |
683 | int gpr_size; | |
684 | int fpr_size; | |
685 | ||
686 | /* The general-purpose registers. */ | |
3fc46200 | 687 | pv_t gpr[S390_NUM_GPRS]; |
a8c99f38 JB |
688 | |
689 | /* The floating-point registers. */ | |
3fc46200 | 690 | pv_t fpr[S390_NUM_FPRS]; |
a8c99f38 | 691 | |
121d8485 UW |
692 | /* The offset relative to the CFA where the incoming GPR N was saved |
693 | by the function prologue. 0 if not saved or unknown. */ | |
694 | int gpr_slot[S390_NUM_GPRS]; | |
4bc8c588 | 695 | |
121d8485 UW |
696 | /* Likewise for FPRs. */ |
697 | int fpr_slot[S390_NUM_FPRS]; | |
4bc8c588 | 698 | |
121d8485 UW |
699 | /* Nonzero if the backchain was saved. This is assumed to be the |
700 | case when the incoming SP is saved at the current SP location. */ | |
701 | int back_chain_saved_p; | |
702 | }; | |
4bc8c588 | 703 | |
3fc46200 UW |
704 | /* Return the effective address for an X-style instruction, like: |
705 | ||
706 | L R1, D2(X2, B2) | |
707 | ||
708 | Here, X2 and B2 are registers, and D2 is a signed 20-bit | |
709 | constant; the effective address is the sum of all three. If either | |
710 | X2 or B2 are zero, then it doesn't contribute to the sum --- this | |
711 | means that r0 can't be used as either X2 or B2. */ | |
712 | static pv_t | |
713 | s390_addr (struct s390_prologue_data *data, | |
714 | int d2, unsigned int x2, unsigned int b2) | |
715 | { | |
716 | pv_t result; | |
717 | ||
718 | result = pv_constant (d2); | |
719 | if (x2) | |
720 | result = pv_add (result, data->gpr[x2]); | |
721 | if (b2) | |
722 | result = pv_add (result, data->gpr[b2]); | |
723 | ||
724 | return result; | |
725 | } | |
726 | ||
727 | /* Do a SIZE-byte store of VALUE to D2(X2,B2). */ | |
a8c99f38 | 728 | static void |
3fc46200 UW |
729 | s390_store (struct s390_prologue_data *data, |
730 | int d2, unsigned int x2, unsigned int b2, CORE_ADDR size, | |
731 | pv_t value) | |
4bc8c588 | 732 | { |
3fc46200 | 733 | pv_t addr = s390_addr (data, d2, x2, b2); |
ee1b3323 | 734 | pv_t offset; |
121d8485 UW |
735 | |
736 | /* Check whether we are storing the backchain. */ | |
3fc46200 | 737 | offset = pv_subtract (data->gpr[S390_SP_REGNUM - S390_R0_REGNUM], addr); |
121d8485 | 738 | |
3fc46200 | 739 | if (pv_is_constant (offset) && offset.k == 0) |
121d8485 | 740 | if (size == data->gpr_size |
3fc46200 | 741 | && pv_is_register_k (value, S390_SP_REGNUM, 0)) |
121d8485 UW |
742 | { |
743 | data->back_chain_saved_p = 1; | |
744 | return; | |
745 | } | |
746 | ||
747 | ||
748 | /* Check whether we are storing a register into the stack. */ | |
ee1b3323 UW |
749 | if (!pv_area_store_would_trash (data->stack, addr)) |
750 | pv_area_store (data->stack, addr, size, value); | |
4bc8c588 | 751 | |
a8c99f38 | 752 | |
121d8485 UW |
753 | /* Note: If this is some store we cannot identify, you might think we |
754 | should forget our cached values, as any of those might have been hit. | |
755 | ||
756 | However, we make the assumption that the register save areas are only | |
757 | ever stored to once in any given function, and we do recognize these | |
758 | stores. Thus every store we cannot recognize does not hit our data. */ | |
4bc8c588 | 759 | } |
4bc8c588 | 760 | |
3fc46200 UW |
761 | /* Do a SIZE-byte load from D2(X2,B2). */ |
762 | static pv_t | |
763 | s390_load (struct s390_prologue_data *data, | |
764 | int d2, unsigned int x2, unsigned int b2, CORE_ADDR size) | |
765 | ||
4bc8c588 | 766 | { |
3fc46200 | 767 | pv_t addr = s390_addr (data, d2, x2, b2); |
ee1b3323 | 768 | pv_t offset; |
4bc8c588 | 769 | |
a8c99f38 JB |
770 | /* If it's a load from an in-line constant pool, then we can |
771 | simulate that, under the assumption that the code isn't | |
772 | going to change between the time the processor actually | |
773 | executed it creating the current frame, and the time when | |
774 | we're analyzing the code to unwind past that frame. */ | |
3fc46200 | 775 | if (pv_is_constant (addr)) |
4bc8c588 | 776 | { |
a8c99f38 | 777 | struct section_table *secp; |
3fc46200 | 778 | secp = target_section_by_addr (¤t_target, addr.k); |
a8c99f38 JB |
779 | if (secp != NULL |
780 | && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section) | |
781 | & SEC_READONLY)) | |
3fc46200 | 782 | return pv_constant (read_memory_integer (addr.k, size)); |
a8c99f38 | 783 | } |
7666f43c | 784 | |
121d8485 | 785 | /* Check whether we are accessing one of our save slots. */ |
ee1b3323 UW |
786 | return pv_area_fetch (data->stack, addr, size); |
787 | } | |
121d8485 | 788 | |
ee1b3323 UW |
789 | /* Function for finding saved registers in a 'struct pv_area'; we pass |
790 | this to pv_area_scan. | |
121d8485 | 791 | |
ee1b3323 UW |
792 | If VALUE is a saved register, ADDR says it was saved at a constant |
793 | offset from the frame base, and SIZE indicates that the whole | |
794 | register was saved, record its offset in the reg_offset table in | |
795 | PROLOGUE_UNTYPED. */ | |
796 | static void | |
797 | s390_check_for_saved (void *data_untyped, pv_t addr, CORE_ADDR size, pv_t value) | |
798 | { | |
799 | struct s390_prologue_data *data = data_untyped; | |
800 | int i, offset; | |
801 | ||
802 | if (!pv_is_register (addr, S390_SP_REGNUM)) | |
803 | return; | |
804 | ||
805 | offset = 16 * data->gpr_size + 32 - addr.k; | |
4bc8c588 | 806 | |
ee1b3323 UW |
807 | /* If we are storing the original value of a register, we want to |
808 | record the CFA offset. If the same register is stored multiple | |
809 | times, the stack slot with the highest address counts. */ | |
810 | ||
811 | for (i = 0; i < S390_NUM_GPRS; i++) | |
812 | if (size == data->gpr_size | |
813 | && pv_is_register_k (value, S390_R0_REGNUM + i, 0)) | |
814 | if (data->gpr_slot[i] == 0 | |
815 | || data->gpr_slot[i] > offset) | |
816 | { | |
817 | data->gpr_slot[i] = offset; | |
818 | return; | |
819 | } | |
820 | ||
821 | for (i = 0; i < S390_NUM_FPRS; i++) | |
822 | if (size == data->fpr_size | |
823 | && pv_is_register_k (value, S390_F0_REGNUM + i, 0)) | |
824 | if (data->fpr_slot[i] == 0 | |
825 | || data->fpr_slot[i] > offset) | |
826 | { | |
827 | data->fpr_slot[i] = offset; | |
828 | return; | |
829 | } | |
a8c99f38 | 830 | } |
4bc8c588 | 831 | |
a8c99f38 JB |
832 | /* Analyze the prologue of the function starting at START_PC, |
833 | continuing at most until CURRENT_PC. Initialize DATA to | |
834 | hold all information we find out about the state of the registers | |
835 | and stack slots. Return the address of the instruction after | |
836 | the last one that changed the SP, FP, or back chain; or zero | |
837 | on error. */ | |
838 | static CORE_ADDR | |
839 | s390_analyze_prologue (struct gdbarch *gdbarch, | |
840 | CORE_ADDR start_pc, | |
841 | CORE_ADDR current_pc, | |
842 | struct s390_prologue_data *data) | |
4bc8c588 | 843 | { |
a8c99f38 JB |
844 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
845 | ||
4bc8c588 | 846 | /* Our return value: |
a8c99f38 JB |
847 | The address of the instruction after the last one that changed |
848 | the SP, FP, or back chain; zero if we got an error trying to | |
849 | read memory. */ | |
850 | CORE_ADDR result = start_pc; | |
4bc8c588 | 851 | |
4bc8c588 JB |
852 | /* The current PC for our abstract interpretation. */ |
853 | CORE_ADDR pc; | |
854 | ||
855 | /* The address of the next instruction after that. */ | |
856 | CORE_ADDR next_pc; | |
857 | ||
4bc8c588 JB |
858 | /* Set up everything's initial value. */ |
859 | { | |
860 | int i; | |
861 | ||
ee1b3323 UW |
862 | data->stack = make_pv_area (S390_SP_REGNUM); |
863 | ||
a8c99f38 JB |
864 | /* For the purpose of prologue tracking, we consider the GPR size to |
865 | be equal to the ABI word size, even if it is actually larger | |
866 | (i.e. when running a 32-bit binary under a 64-bit kernel). */ | |
867 | data->gpr_size = word_size; | |
868 | data->fpr_size = 8; | |
869 | ||
4bc8c588 | 870 | for (i = 0; i < S390_NUM_GPRS; i++) |
3fc46200 | 871 | data->gpr[i] = pv_register (S390_R0_REGNUM + i, 0); |
4bc8c588 JB |
872 | |
873 | for (i = 0; i < S390_NUM_FPRS; i++) | |
3fc46200 | 874 | data->fpr[i] = pv_register (S390_F0_REGNUM + i, 0); |
4bc8c588 | 875 | |
121d8485 UW |
876 | for (i = 0; i < S390_NUM_GPRS; i++) |
877 | data->gpr_slot[i] = 0; | |
878 | ||
879 | for (i = 0; i < S390_NUM_FPRS; i++) | |
880 | data->fpr_slot[i] = 0; | |
4bc8c588 | 881 | |
121d8485 | 882 | data->back_chain_saved_p = 0; |
4bc8c588 JB |
883 | } |
884 | ||
a8c99f38 JB |
885 | /* Start interpreting instructions, until we hit the frame's |
886 | current PC or the first branch instruction. */ | |
887 | for (pc = start_pc; pc > 0 && pc < current_pc; pc = next_pc) | |
5769d3cd | 888 | { |
4bc8c588 | 889 | bfd_byte insn[S390_MAX_INSTR_SIZE]; |
a788de9b | 890 | int insn_len = s390_readinstruction (insn, pc); |
4bc8c588 | 891 | |
3fc46200 UW |
892 | bfd_byte dummy[S390_MAX_INSTR_SIZE] = { 0 }; |
893 | bfd_byte *insn32 = word_size == 4 ? insn : dummy; | |
894 | bfd_byte *insn64 = word_size == 8 ? insn : dummy; | |
895 | ||
4bc8c588 | 896 | /* Fields for various kinds of instructions. */ |
a8c99f38 JB |
897 | unsigned int b2, r1, r2, x2, r3; |
898 | int i2, d2; | |
4bc8c588 | 899 | |
121d8485 | 900 | /* The values of SP and FP before this instruction, |
4bc8c588 | 901 | for detecting instructions that change them. */ |
3fc46200 | 902 | pv_t pre_insn_sp, pre_insn_fp; |
121d8485 UW |
903 | /* Likewise for the flag whether the back chain was saved. */ |
904 | int pre_insn_back_chain_saved_p; | |
4bc8c588 JB |
905 | |
906 | /* If we got an error trying to read the instruction, report it. */ | |
907 | if (insn_len < 0) | |
8ac0e65a | 908 | { |
a8c99f38 | 909 | result = 0; |
4bc8c588 JB |
910 | break; |
911 | } | |
912 | ||
913 | next_pc = pc + insn_len; | |
914 | ||
a8c99f38 JB |
915 | pre_insn_sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
916 | pre_insn_fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; | |
121d8485 | 917 | pre_insn_back_chain_saved_p = data->back_chain_saved_p; |
4bc8c588 | 918 | |
4bc8c588 | 919 | |
3fc46200 UW |
920 | /* LHI r1, i2 --- load halfword immediate. */ |
921 | /* LGHI r1, i2 --- load halfword immediate (64-bit version). */ | |
922 | /* LGFI r1, i2 --- load fullword immediate. */ | |
923 | if (is_ri (insn32, op1_lhi, op2_lhi, &r1, &i2) | |
924 | || is_ri (insn64, op1_lghi, op2_lghi, &r1, &i2) | |
925 | || is_ril (insn, op1_lgfi, op2_lgfi, &r1, &i2)) | |
926 | data->gpr[r1] = pv_constant (i2); | |
927 | ||
928 | /* LR r1, r2 --- load from register. */ | |
929 | /* LGR r1, r2 --- load from register (64-bit version). */ | |
930 | else if (is_rr (insn32, op_lr, &r1, &r2) | |
931 | || is_rre (insn64, op_lgr, &r1, &r2)) | |
932 | data->gpr[r1] = data->gpr[r2]; | |
933 | ||
934 | /* L r1, d2(x2, b2) --- load. */ | |
935 | /* LY r1, d2(x2, b2) --- load (long-displacement version). */ | |
936 | /* LG r1, d2(x2, b2) --- load (64-bit version). */ | |
937 | else if (is_rx (insn32, op_l, &r1, &d2, &x2, &b2) | |
938 | || is_rxy (insn32, op1_ly, op2_ly, &r1, &d2, &x2, &b2) | |
939 | || is_rxy (insn64, op1_lg, op2_lg, &r1, &d2, &x2, &b2)) | |
940 | data->gpr[r1] = s390_load (data, d2, x2, b2, data->gpr_size); | |
941 | ||
942 | /* ST r1, d2(x2, b2) --- store. */ | |
943 | /* STY r1, d2(x2, b2) --- store (long-displacement version). */ | |
944 | /* STG r1, d2(x2, b2) --- store (64-bit version). */ | |
945 | else if (is_rx (insn32, op_st, &r1, &d2, &x2, &b2) | |
946 | || is_rxy (insn32, op1_sty, op2_sty, &r1, &d2, &x2, &b2) | |
947 | || is_rxy (insn64, op1_stg, op2_stg, &r1, &d2, &x2, &b2)) | |
948 | s390_store (data, d2, x2, b2, data->gpr_size, data->gpr[r1]); | |
949 | ||
950 | /* STD r1, d2(x2,b2) --- store floating-point register. */ | |
4bc8c588 | 951 | else if (is_rx (insn, op_std, &r1, &d2, &x2, &b2)) |
3fc46200 UW |
952 | s390_store (data, d2, x2, b2, data->fpr_size, data->fpr[r1]); |
953 | ||
954 | /* STM r1, r3, d2(b2) --- store multiple. */ | |
955 | /* STMY r1, r3, d2(b2) --- store multiple (long-displacement version). */ | |
956 | /* STMG r1, r3, d2(b2) --- store multiple (64-bit version). */ | |
957 | else if (is_rs (insn32, op_stm, &r1, &r3, &d2, &b2) | |
958 | || is_rsy (insn32, op1_stmy, op2_stmy, &r1, &r3, &d2, &b2) | |
959 | || is_rsy (insn64, op1_stmg, op2_stmg, &r1, &r3, &d2, &b2)) | |
4bc8c588 | 960 | { |
3fc46200 UW |
961 | for (; r1 <= r3; r1++, d2 += data->gpr_size) |
962 | s390_store (data, d2, 0, b2, data->gpr_size, data->gpr[r1]); | |
4bc8c588 JB |
963 | } |
964 | ||
3fc46200 UW |
965 | /* AHI r1, i2 --- add halfword immediate. */ |
966 | /* AGHI r1, i2 --- add halfword immediate (64-bit version). */ | |
967 | /* AFI r1, i2 --- add fullword immediate. */ | |
968 | /* AGFI r1, i2 --- add fullword immediate (64-bit version). */ | |
969 | else if (is_ri (insn32, op1_ahi, op2_ahi, &r1, &i2) | |
970 | || is_ri (insn64, op1_aghi, op2_aghi, &r1, &i2) | |
971 | || is_ril (insn32, op1_afi, op2_afi, &r1, &i2) | |
972 | || is_ril (insn64, op1_agfi, op2_agfi, &r1, &i2)) | |
973 | data->gpr[r1] = pv_add_constant (data->gpr[r1], i2); | |
974 | ||
975 | /* ALFI r1, i2 --- add logical immediate. */ | |
976 | /* ALGFI r1, i2 --- add logical immediate (64-bit version). */ | |
977 | else if (is_ril (insn32, op1_alfi, op2_alfi, &r1, &i2) | |
978 | || is_ril (insn64, op1_algfi, op2_algfi, &r1, &i2)) | |
979 | data->gpr[r1] = pv_add_constant (data->gpr[r1], | |
980 | (CORE_ADDR)i2 & 0xffffffff); | |
981 | ||
982 | /* AR r1, r2 -- add register. */ | |
983 | /* AGR r1, r2 -- add register (64-bit version). */ | |
984 | else if (is_rr (insn32, op_ar, &r1, &r2) | |
985 | || is_rre (insn64, op_agr, &r1, &r2)) | |
986 | data->gpr[r1] = pv_add (data->gpr[r1], data->gpr[r2]); | |
987 | ||
988 | /* A r1, d2(x2, b2) -- add. */ | |
989 | /* AY r1, d2(x2, b2) -- add (long-displacement version). */ | |
990 | /* AG r1, d2(x2, b2) -- add (64-bit version). */ | |
991 | else if (is_rx (insn32, op_a, &r1, &d2, &x2, &b2) | |
992 | || is_rxy (insn32, op1_ay, op2_ay, &r1, &d2, &x2, &b2) | |
993 | || is_rxy (insn64, op1_ag, op2_ag, &r1, &d2, &x2, &b2)) | |
994 | data->gpr[r1] = pv_add (data->gpr[r1], | |
995 | s390_load (data, d2, x2, b2, data->gpr_size)); | |
996 | ||
997 | /* SLFI r1, i2 --- subtract logical immediate. */ | |
998 | /* SLGFI r1, i2 --- subtract logical immediate (64-bit version). */ | |
999 | else if (is_ril (insn32, op1_slfi, op2_slfi, &r1, &i2) | |
1000 | || is_ril (insn64, op1_slgfi, op2_slgfi, &r1, &i2)) | |
1001 | data->gpr[r1] = pv_add_constant (data->gpr[r1], | |
1002 | -((CORE_ADDR)i2 & 0xffffffff)); | |
1003 | ||
1004 | /* SR r1, r2 -- subtract register. */ | |
1005 | /* SGR r1, r2 -- subtract register (64-bit version). */ | |
1006 | else if (is_rr (insn32, op_sr, &r1, &r2) | |
1007 | || is_rre (insn64, op_sgr, &r1, &r2)) | |
1008 | data->gpr[r1] = pv_subtract (data->gpr[r1], data->gpr[r2]); | |
1009 | ||
1010 | /* S r1, d2(x2, b2) -- subtract. */ | |
1011 | /* SY r1, d2(x2, b2) -- subtract (long-displacement version). */ | |
1012 | /* SG r1, d2(x2, b2) -- subtract (64-bit version). */ | |
1013 | else if (is_rx (insn32, op_s, &r1, &d2, &x2, &b2) | |
1014 | || is_rxy (insn32, op1_sy, op2_sy, &r1, &d2, &x2, &b2) | |
1015 | || is_rxy (insn64, op1_sg, op2_sg, &r1, &d2, &x2, &b2)) | |
1016 | data->gpr[r1] = pv_subtract (data->gpr[r1], | |
1017 | s390_load (data, d2, x2, b2, data->gpr_size)); | |
1018 | ||
1019 | /* LA r1, d2(x2, b2) --- load address. */ | |
1020 | /* LAY r1, d2(x2, b2) --- load address (long-displacement version). */ | |
1021 | else if (is_rx (insn, op_la, &r1, &d2, &x2, &b2) | |
1022 | || is_rxy (insn, op1_lay, op2_lay, &r1, &d2, &x2, &b2)) | |
1023 | data->gpr[r1] = s390_addr (data, d2, x2, b2); | |
1024 | ||
1025 | /* LARL r1, i2 --- load address relative long. */ | |
a8c99f38 | 1026 | else if (is_ril (insn, op1_larl, op2_larl, &r1, &i2)) |
3fc46200 | 1027 | data->gpr[r1] = pv_constant (pc + i2 * 2); |
a8c99f38 | 1028 | |
3fc46200 | 1029 | /* BASR r1, 0 --- branch and save. |
a8c99f38 JB |
1030 | Since r2 is zero, this saves the PC in r1, but doesn't branch. */ |
1031 | else if (is_rr (insn, op_basr, &r1, &r2) | |
1032 | && r2 == 0) | |
3fc46200 | 1033 | data->gpr[r1] = pv_constant (next_pc); |
a8c99f38 | 1034 | |
3fc46200 | 1035 | /* BRAS r1, i2 --- branch relative and save. */ |
a8c99f38 JB |
1036 | else if (is_ri (insn, op1_bras, op2_bras, &r1, &i2)) |
1037 | { | |
3fc46200 | 1038 | data->gpr[r1] = pv_constant (next_pc); |
a8c99f38 | 1039 | next_pc = pc + i2 * 2; |
4bc8c588 | 1040 | |
a8c99f38 JB |
1041 | /* We'd better not interpret any backward branches. We'll |
1042 | never terminate. */ | |
1043 | if (next_pc <= pc) | |
4bc8c588 JB |
1044 | break; |
1045 | } | |
1046 | ||
a8c99f38 JB |
1047 | /* Terminate search when hitting any other branch instruction. */ |
1048 | else if (is_rr (insn, op_basr, &r1, &r2) | |
1049 | || is_rx (insn, op_bas, &r1, &d2, &x2, &b2) | |
1050 | || is_rr (insn, op_bcr, &r1, &r2) | |
1051 | || is_rx (insn, op_bc, &r1, &d2, &x2, &b2) | |
1052 | || is_ri (insn, op1_brc, op2_brc, &r1, &i2) | |
1053 | || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2) | |
1054 | || is_ril (insn, op1_brasl, op2_brasl, &r2, &i2)) | |
1055 | break; | |
1056 | ||
4bc8c588 JB |
1057 | else |
1058 | /* An instruction we don't know how to simulate. The only | |
1059 | safe thing to do would be to set every value we're tracking | |
a8c99f38 JB |
1060 | to 'unknown'. Instead, we'll be optimistic: we assume that |
1061 | we *can* interpret every instruction that the compiler uses | |
1062 | to manipulate any of the data we're interested in here -- | |
1063 | then we can just ignore anything else. */ | |
1064 | ; | |
4bc8c588 JB |
1065 | |
1066 | /* Record the address after the last instruction that changed | |
1067 | the FP, SP, or backlink. Ignore instructions that changed | |
1068 | them back to their original values --- those are probably | |
1069 | restore instructions. (The back chain is never restored, | |
1070 | just popped.) */ | |
1071 | { | |
3fc46200 UW |
1072 | pv_t sp = data->gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
1073 | pv_t fp = data->gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; | |
4bc8c588 | 1074 | |
3fc46200 UW |
1075 | if ((! pv_is_identical (pre_insn_sp, sp) |
1076 | && ! pv_is_register_k (sp, S390_SP_REGNUM, 0) | |
1077 | && sp.kind != pvk_unknown) | |
1078 | || (! pv_is_identical (pre_insn_fp, fp) | |
1079 | && ! pv_is_register_k (fp, S390_FRAME_REGNUM, 0) | |
1080 | && fp.kind != pvk_unknown) | |
121d8485 | 1081 | || pre_insn_back_chain_saved_p != data->back_chain_saved_p) |
a8c99f38 | 1082 | result = next_pc; |
4bc8c588 | 1083 | } |
5769d3cd | 1084 | } |
4bc8c588 | 1085 | |
ee1b3323 UW |
1086 | /* Record where all the registers were saved. */ |
1087 | pv_area_scan (data->stack, s390_check_for_saved, data); | |
1088 | ||
1089 | free_pv_area (data->stack); | |
1090 | data->stack = NULL; | |
1091 | ||
4bc8c588 | 1092 | return result; |
5769d3cd AC |
1093 | } |
1094 | ||
a8c99f38 JB |
1095 | /* Advance PC across any function entry prologue instructions to reach |
1096 | some "real" code. */ | |
1097 | static CORE_ADDR | |
1098 | s390_skip_prologue (CORE_ADDR pc) | |
1099 | { | |
1100 | struct s390_prologue_data data; | |
1101 | CORE_ADDR skip_pc; | |
1102 | skip_pc = s390_analyze_prologue (current_gdbarch, pc, (CORE_ADDR)-1, &data); | |
1103 | return skip_pc ? skip_pc : pc; | |
1104 | } | |
1105 | ||
d0f54f9d JB |
1106 | /* Return true if we are in the functin's epilogue, i.e. after the |
1107 | instruction that destroyed the function's stack frame. */ | |
1108 | static int | |
1109 | s390_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1110 | { | |
1111 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
1112 | ||
1113 | /* In frameless functions, there's not frame to destroy and thus | |
1114 | we don't care about the epilogue. | |
1115 | ||
1116 | In functions with frame, the epilogue sequence is a pair of | |
1117 | a LM-type instruction that restores (amongst others) the | |
1118 | return register %r14 and the stack pointer %r15, followed | |
1119 | by a branch 'br %r14' --or equivalent-- that effects the | |
1120 | actual return. | |
1121 | ||
1122 | In that situation, this function needs to return 'true' in | |
1123 | exactly one case: when pc points to that branch instruction. | |
1124 | ||
1125 | Thus we try to disassemble the one instructions immediately | |
1126 | preceeding pc and check whether it is an LM-type instruction | |
1127 | modifying the stack pointer. | |
1128 | ||
1129 | Note that disassembling backwards is not reliable, so there | |
1130 | is a slight chance of false positives here ... */ | |
1131 | ||
1132 | bfd_byte insn[6]; | |
1133 | unsigned int r1, r3, b2; | |
1134 | int d2; | |
1135 | ||
1136 | if (word_size == 4 | |
359a9262 | 1137 | && !read_memory_nobpt (pc - 4, insn, 4) |
d0f54f9d JB |
1138 | && is_rs (insn, op_lm, &r1, &r3, &d2, &b2) |
1139 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) | |
1140 | return 1; | |
1141 | ||
a8c99f38 | 1142 | if (word_size == 4 |
359a9262 | 1143 | && !read_memory_nobpt (pc - 6, insn, 6) |
a8c99f38 JB |
1144 | && is_rsy (insn, op1_lmy, op2_lmy, &r1, &r3, &d2, &b2) |
1145 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) | |
1146 | return 1; | |
1147 | ||
d0f54f9d | 1148 | if (word_size == 8 |
359a9262 | 1149 | && !read_memory_nobpt (pc - 6, insn, 6) |
a8c99f38 | 1150 | && is_rsy (insn, op1_lmg, op2_lmg, &r1, &r3, &d2, &b2) |
d0f54f9d JB |
1151 | && r3 == S390_SP_REGNUM - S390_R0_REGNUM) |
1152 | return 1; | |
1153 | ||
1154 | return 0; | |
1155 | } | |
5769d3cd | 1156 | |
a8c99f38 JB |
1157 | |
1158 | /* Normal stack frames. */ | |
1159 | ||
1160 | struct s390_unwind_cache { | |
1161 | ||
1162 | CORE_ADDR func; | |
1163 | CORE_ADDR frame_base; | |
1164 | CORE_ADDR local_base; | |
1165 | ||
1166 | struct trad_frame_saved_reg *saved_regs; | |
1167 | }; | |
1168 | ||
a78f21af | 1169 | static int |
a8c99f38 JB |
1170 | s390_prologue_frame_unwind_cache (struct frame_info *next_frame, |
1171 | struct s390_unwind_cache *info) | |
5769d3cd | 1172 | { |
a8c99f38 | 1173 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
121d8485 | 1174 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
a8c99f38 JB |
1175 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
1176 | struct s390_prologue_data data; | |
3fc46200 UW |
1177 | pv_t *fp = &data.gpr[S390_FRAME_REGNUM - S390_R0_REGNUM]; |
1178 | pv_t *sp = &data.gpr[S390_SP_REGNUM - S390_R0_REGNUM]; | |
121d8485 UW |
1179 | int i; |
1180 | CORE_ADDR cfa; | |
a8c99f38 JB |
1181 | CORE_ADDR func; |
1182 | CORE_ADDR result; | |
1183 | ULONGEST reg; | |
1184 | CORE_ADDR prev_sp; | |
1185 | int frame_pointer; | |
1186 | int size; | |
1187 | ||
1188 | /* Try to find the function start address. If we can't find it, we don't | |
1189 | bother searching for it -- with modern compilers this would be mostly | |
1190 | pointless anyway. Trust that we'll either have valid DWARF-2 CFI data | |
1191 | or else a valid backchain ... */ | |
93d42b30 | 1192 | func = frame_func_unwind (next_frame, NORMAL_FRAME); |
a8c99f38 JB |
1193 | if (!func) |
1194 | return 0; | |
5769d3cd | 1195 | |
a8c99f38 JB |
1196 | /* Try to analyze the prologue. */ |
1197 | result = s390_analyze_prologue (gdbarch, func, | |
1198 | frame_pc_unwind (next_frame), &data); | |
1199 | if (!result) | |
5769d3cd | 1200 | return 0; |
5769d3cd | 1201 | |
a8c99f38 JB |
1202 | /* If this was successful, we should have found the instruction that |
1203 | sets the stack pointer register to the previous value of the stack | |
1204 | pointer minus the frame size. */ | |
3fc46200 | 1205 | if (!pv_is_register (*sp, S390_SP_REGNUM)) |
5769d3cd | 1206 | return 0; |
a8c99f38 JB |
1207 | |
1208 | /* A frame size of zero at this point can mean either a real | |
1209 | frameless function, or else a failure to find the prologue. | |
1210 | Perform some sanity checks to verify we really have a | |
1211 | frameless function. */ | |
1212 | if (sp->k == 0) | |
5769d3cd | 1213 | { |
a8c99f38 JB |
1214 | /* If the next frame is a NORMAL_FRAME, this frame *cannot* have frame |
1215 | size zero. This is only possible if the next frame is a sentinel | |
1216 | frame, a dummy frame, or a signal trampoline frame. */ | |
0e100dab AC |
1217 | /* FIXME: cagney/2004-05-01: This sanity check shouldn't be |
1218 | needed, instead the code should simpliy rely on its | |
1219 | analysis. */ | |
1220 | if (get_frame_type (next_frame) == NORMAL_FRAME) | |
5769d3cd | 1221 | return 0; |
5769d3cd | 1222 | |
a8c99f38 JB |
1223 | /* If we really have a frameless function, %r14 must be valid |
1224 | -- in particular, it must point to a different function. */ | |
1225 | reg = frame_unwind_register_unsigned (next_frame, S390_RETADDR_REGNUM); | |
1226 | reg = gdbarch_addr_bits_remove (gdbarch, reg) - 1; | |
1227 | if (get_pc_function_start (reg) == func) | |
5769d3cd | 1228 | { |
a8c99f38 JB |
1229 | /* However, there is one case where it *is* valid for %r14 |
1230 | to point to the same function -- if this is a recursive | |
1231 | call, and we have stopped in the prologue *before* the | |
1232 | stack frame was allocated. | |
1233 | ||
1234 | Recognize this case by looking ahead a bit ... */ | |
5769d3cd | 1235 | |
a8c99f38 | 1236 | struct s390_prologue_data data2; |
3fc46200 | 1237 | pv_t *sp = &data2.gpr[S390_SP_REGNUM - S390_R0_REGNUM]; |
a8c99f38 JB |
1238 | |
1239 | if (!(s390_analyze_prologue (gdbarch, func, (CORE_ADDR)-1, &data2) | |
3fc46200 | 1240 | && pv_is_register (*sp, S390_SP_REGNUM) |
a8c99f38 JB |
1241 | && sp->k != 0)) |
1242 | return 0; | |
5769d3cd | 1243 | } |
5769d3cd | 1244 | } |
5769d3cd AC |
1245 | |
1246 | ||
a8c99f38 JB |
1247 | /* OK, we've found valid prologue data. */ |
1248 | size = -sp->k; | |
5769d3cd | 1249 | |
a8c99f38 JB |
1250 | /* If the frame pointer originally also holds the same value |
1251 | as the stack pointer, we're probably using it. If it holds | |
1252 | some other value -- even a constant offset -- it is most | |
1253 | likely used as temp register. */ | |
3fc46200 | 1254 | if (pv_is_identical (*sp, *fp)) |
a8c99f38 JB |
1255 | frame_pointer = S390_FRAME_REGNUM; |
1256 | else | |
1257 | frame_pointer = S390_SP_REGNUM; | |
1258 | ||
1259 | /* If we've detected a function with stack frame, we'll still have to | |
1260 | treat it as frameless if we're currently within the function epilog | |
1261 | code at a point where the frame pointer has already been restored. | |
1262 | This can only happen in an innermost frame. */ | |
0e100dab AC |
1263 | /* FIXME: cagney/2004-05-01: This sanity check shouldn't be needed, |
1264 | instead the code should simpliy rely on its analysis. */ | |
1265 | if (size > 0 && get_frame_type (next_frame) != NORMAL_FRAME) | |
5769d3cd | 1266 | { |
a8c99f38 JB |
1267 | /* See the comment in s390_in_function_epilogue_p on why this is |
1268 | not completely reliable ... */ | |
1269 | if (s390_in_function_epilogue_p (gdbarch, frame_pc_unwind (next_frame))) | |
5769d3cd | 1270 | { |
a8c99f38 JB |
1271 | memset (&data, 0, sizeof (data)); |
1272 | size = 0; | |
1273 | frame_pointer = S390_SP_REGNUM; | |
5769d3cd | 1274 | } |
5769d3cd | 1275 | } |
5769d3cd | 1276 | |
a8c99f38 JB |
1277 | /* Once we know the frame register and the frame size, we can unwind |
1278 | the current value of the frame register from the next frame, and | |
1279 | add back the frame size to arrive that the previous frame's | |
1280 | stack pointer value. */ | |
1281 | prev_sp = frame_unwind_register_unsigned (next_frame, frame_pointer) + size; | |
121d8485 | 1282 | cfa = prev_sp + 16*word_size + 32; |
5769d3cd | 1283 | |
121d8485 UW |
1284 | /* Record the addresses of all register spill slots the prologue parser |
1285 | has recognized. Consider only registers defined as call-saved by the | |
1286 | ABI; for call-clobbered registers the parser may have recognized | |
1287 | spurious stores. */ | |
5769d3cd | 1288 | |
121d8485 UW |
1289 | for (i = 6; i <= 15; i++) |
1290 | if (data.gpr_slot[i] != 0) | |
1291 | info->saved_regs[S390_R0_REGNUM + i].addr = cfa - data.gpr_slot[i]; | |
a8c99f38 | 1292 | |
121d8485 | 1293 | switch (tdep->abi) |
5769d3cd | 1294 | { |
121d8485 UW |
1295 | case ABI_LINUX_S390: |
1296 | if (data.fpr_slot[4] != 0) | |
1297 | info->saved_regs[S390_F4_REGNUM].addr = cfa - data.fpr_slot[4]; | |
1298 | if (data.fpr_slot[6] != 0) | |
1299 | info->saved_regs[S390_F6_REGNUM].addr = cfa - data.fpr_slot[6]; | |
1300 | break; | |
a8c99f38 | 1301 | |
121d8485 UW |
1302 | case ABI_LINUX_ZSERIES: |
1303 | for (i = 8; i <= 15; i++) | |
1304 | if (data.fpr_slot[i] != 0) | |
1305 | info->saved_regs[S390_F0_REGNUM + i].addr = cfa - data.fpr_slot[i]; | |
1306 | break; | |
a8c99f38 JB |
1307 | } |
1308 | ||
1309 | /* Function return will set PC to %r14. */ | |
1310 | info->saved_regs[S390_PC_REGNUM] = info->saved_regs[S390_RETADDR_REGNUM]; | |
1311 | ||
1312 | /* In frameless functions, we unwind simply by moving the return | |
1313 | address to the PC. However, if we actually stored to the | |
1314 | save area, use that -- we might only think the function frameless | |
1315 | because we're in the middle of the prologue ... */ | |
1316 | if (size == 0 | |
1317 | && !trad_frame_addr_p (info->saved_regs, S390_PC_REGNUM)) | |
1318 | { | |
1319 | info->saved_regs[S390_PC_REGNUM].realreg = S390_RETADDR_REGNUM; | |
5769d3cd | 1320 | } |
a8c99f38 JB |
1321 | |
1322 | /* Another sanity check: unless this is a frameless function, | |
1323 | we should have found spill slots for SP and PC. | |
1324 | If not, we cannot unwind further -- this happens e.g. in | |
1325 | libc's thread_start routine. */ | |
1326 | if (size > 0) | |
5769d3cd | 1327 | { |
a8c99f38 JB |
1328 | if (!trad_frame_addr_p (info->saved_regs, S390_SP_REGNUM) |
1329 | || !trad_frame_addr_p (info->saved_regs, S390_PC_REGNUM)) | |
1330 | prev_sp = -1; | |
5769d3cd | 1331 | } |
a8c99f38 JB |
1332 | |
1333 | /* We use the current value of the frame register as local_base, | |
1334 | and the top of the register save area as frame_base. */ | |
1335 | if (prev_sp != -1) | |
1336 | { | |
1337 | info->frame_base = prev_sp + 16*word_size + 32; | |
1338 | info->local_base = prev_sp - size; | |
1339 | } | |
1340 | ||
1341 | info->func = func; | |
1342 | return 1; | |
5769d3cd AC |
1343 | } |
1344 | ||
a78f21af | 1345 | static void |
a8c99f38 JB |
1346 | s390_backchain_frame_unwind_cache (struct frame_info *next_frame, |
1347 | struct s390_unwind_cache *info) | |
5769d3cd | 1348 | { |
a8c99f38 JB |
1349 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
1350 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
1351 | CORE_ADDR backchain; | |
1352 | ULONGEST reg; | |
1353 | LONGEST sp; | |
1354 | ||
1355 | /* Get the backchain. */ | |
1356 | reg = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM); | |
1357 | backchain = read_memory_unsigned_integer (reg, word_size); | |
1358 | ||
1359 | /* A zero backchain terminates the frame chain. As additional | |
1360 | sanity check, let's verify that the spill slot for SP in the | |
1361 | save area pointed to by the backchain in fact links back to | |
1362 | the save area. */ | |
1363 | if (backchain != 0 | |
1364 | && safe_read_memory_integer (backchain + 15*word_size, word_size, &sp) | |
1365 | && (CORE_ADDR)sp == backchain) | |
1366 | { | |
1367 | /* We don't know which registers were saved, but it will have | |
1368 | to be at least %r14 and %r15. This will allow us to continue | |
1369 | unwinding, but other prev-frame registers may be incorrect ... */ | |
1370 | info->saved_regs[S390_SP_REGNUM].addr = backchain + 15*word_size; | |
1371 | info->saved_regs[S390_RETADDR_REGNUM].addr = backchain + 14*word_size; | |
1372 | ||
1373 | /* Function return will set PC to %r14. */ | |
1374 | info->saved_regs[S390_PC_REGNUM] = info->saved_regs[S390_RETADDR_REGNUM]; | |
1375 | ||
1376 | /* We use the current value of the frame register as local_base, | |
1377 | and the top of the register save area as frame_base. */ | |
1378 | info->frame_base = backchain + 16*word_size + 32; | |
1379 | info->local_base = reg; | |
1380 | } | |
1381 | ||
1382 | info->func = frame_pc_unwind (next_frame); | |
5769d3cd AC |
1383 | } |
1384 | ||
a8c99f38 JB |
1385 | static struct s390_unwind_cache * |
1386 | s390_frame_unwind_cache (struct frame_info *next_frame, | |
1387 | void **this_prologue_cache) | |
1388 | { | |
1389 | struct s390_unwind_cache *info; | |
1390 | if (*this_prologue_cache) | |
1391 | return *this_prologue_cache; | |
1392 | ||
1393 | info = FRAME_OBSTACK_ZALLOC (struct s390_unwind_cache); | |
1394 | *this_prologue_cache = info; | |
1395 | info->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
1396 | info->func = -1; | |
1397 | info->frame_base = -1; | |
1398 | info->local_base = -1; | |
1399 | ||
1400 | /* Try to use prologue analysis to fill the unwind cache. | |
1401 | If this fails, fall back to reading the stack backchain. */ | |
1402 | if (!s390_prologue_frame_unwind_cache (next_frame, info)) | |
1403 | s390_backchain_frame_unwind_cache (next_frame, info); | |
1404 | ||
1405 | return info; | |
1406 | } | |
5769d3cd | 1407 | |
a78f21af | 1408 | static void |
a8c99f38 JB |
1409 | s390_frame_this_id (struct frame_info *next_frame, |
1410 | void **this_prologue_cache, | |
1411 | struct frame_id *this_id) | |
5769d3cd | 1412 | { |
a8c99f38 JB |
1413 | struct s390_unwind_cache *info |
1414 | = s390_frame_unwind_cache (next_frame, this_prologue_cache); | |
5769d3cd | 1415 | |
a8c99f38 JB |
1416 | if (info->frame_base == -1) |
1417 | return; | |
5769d3cd | 1418 | |
a8c99f38 | 1419 | *this_id = frame_id_build (info->frame_base, info->func); |
5769d3cd AC |
1420 | } |
1421 | ||
a8c99f38 JB |
1422 | static void |
1423 | s390_frame_prev_register (struct frame_info *next_frame, | |
1424 | void **this_prologue_cache, | |
1425 | int regnum, int *optimizedp, | |
1426 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
f127898a | 1427 | int *realnump, gdb_byte *bufferp) |
a8c99f38 JB |
1428 | { |
1429 | struct s390_unwind_cache *info | |
1430 | = s390_frame_unwind_cache (next_frame, this_prologue_cache); | |
1f67027d AC |
1431 | trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, |
1432 | optimizedp, lvalp, addrp, realnump, bufferp); | |
a8c99f38 JB |
1433 | } |
1434 | ||
1435 | static const struct frame_unwind s390_frame_unwind = { | |
1436 | NORMAL_FRAME, | |
1437 | s390_frame_this_id, | |
1438 | s390_frame_prev_register | |
1439 | }; | |
1440 | ||
1441 | static const struct frame_unwind * | |
1442 | s390_frame_sniffer (struct frame_info *next_frame) | |
1443 | { | |
1444 | return &s390_frame_unwind; | |
1445 | } | |
5769d3cd AC |
1446 | |
1447 | ||
8e645ae7 AC |
1448 | /* Code stubs and their stack frames. For things like PLTs and NULL |
1449 | function calls (where there is no true frame and the return address | |
1450 | is in the RETADDR register). */ | |
a8c99f38 | 1451 | |
8e645ae7 AC |
1452 | struct s390_stub_unwind_cache |
1453 | { | |
a8c99f38 JB |
1454 | CORE_ADDR frame_base; |
1455 | struct trad_frame_saved_reg *saved_regs; | |
1456 | }; | |
1457 | ||
8e645ae7 AC |
1458 | static struct s390_stub_unwind_cache * |
1459 | s390_stub_frame_unwind_cache (struct frame_info *next_frame, | |
1460 | void **this_prologue_cache) | |
5769d3cd | 1461 | { |
a8c99f38 JB |
1462 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
1463 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
8e645ae7 | 1464 | struct s390_stub_unwind_cache *info; |
a8c99f38 | 1465 | ULONGEST reg; |
5c3cf190 | 1466 | |
a8c99f38 JB |
1467 | if (*this_prologue_cache) |
1468 | return *this_prologue_cache; | |
5c3cf190 | 1469 | |
8e645ae7 | 1470 | info = FRAME_OBSTACK_ZALLOC (struct s390_stub_unwind_cache); |
a8c99f38 JB |
1471 | *this_prologue_cache = info; |
1472 | info->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
1473 | ||
1474 | /* The return address is in register %r14. */ | |
1475 | info->saved_regs[S390_PC_REGNUM].realreg = S390_RETADDR_REGNUM; | |
1476 | ||
1477 | /* Retrieve stack pointer and determine our frame base. */ | |
1478 | reg = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM); | |
1479 | info->frame_base = reg + 16*word_size + 32; | |
1480 | ||
1481 | return info; | |
5769d3cd AC |
1482 | } |
1483 | ||
a8c99f38 | 1484 | static void |
8e645ae7 AC |
1485 | s390_stub_frame_this_id (struct frame_info *next_frame, |
1486 | void **this_prologue_cache, | |
1487 | struct frame_id *this_id) | |
5769d3cd | 1488 | { |
8e645ae7 AC |
1489 | struct s390_stub_unwind_cache *info |
1490 | = s390_stub_frame_unwind_cache (next_frame, this_prologue_cache); | |
a8c99f38 JB |
1491 | *this_id = frame_id_build (info->frame_base, frame_pc_unwind (next_frame)); |
1492 | } | |
5769d3cd | 1493 | |
a8c99f38 | 1494 | static void |
8e645ae7 AC |
1495 | s390_stub_frame_prev_register (struct frame_info *next_frame, |
1496 | void **this_prologue_cache, | |
1497 | int regnum, int *optimizedp, | |
1498 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
f127898a | 1499 | int *realnump, gdb_byte *bufferp) |
8e645ae7 AC |
1500 | { |
1501 | struct s390_stub_unwind_cache *info | |
1502 | = s390_stub_frame_unwind_cache (next_frame, this_prologue_cache); | |
1f67027d AC |
1503 | trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, |
1504 | optimizedp, lvalp, addrp, realnump, bufferp); | |
a8c99f38 JB |
1505 | } |
1506 | ||
8e645ae7 | 1507 | static const struct frame_unwind s390_stub_frame_unwind = { |
a8c99f38 | 1508 | NORMAL_FRAME, |
8e645ae7 AC |
1509 | s390_stub_frame_this_id, |
1510 | s390_stub_frame_prev_register | |
a8c99f38 | 1511 | }; |
5769d3cd | 1512 | |
a8c99f38 | 1513 | static const struct frame_unwind * |
8e645ae7 | 1514 | s390_stub_frame_sniffer (struct frame_info *next_frame) |
a8c99f38 | 1515 | { |
93d42b30 | 1516 | CORE_ADDR addr_in_block; |
8e645ae7 AC |
1517 | bfd_byte insn[S390_MAX_INSTR_SIZE]; |
1518 | ||
1519 | /* If the current PC points to non-readable memory, we assume we | |
1520 | have trapped due to an invalid function pointer call. We handle | |
1521 | the non-existing current function like a PLT stub. */ | |
93d42b30 DJ |
1522 | addr_in_block = frame_unwind_address_in_block (next_frame, NORMAL_FRAME); |
1523 | if (in_plt_section (addr_in_block, NULL) | |
1524 | || s390_readinstruction (insn, frame_pc_unwind (next_frame)) < 0) | |
8e645ae7 AC |
1525 | return &s390_stub_frame_unwind; |
1526 | return NULL; | |
a8c99f38 | 1527 | } |
5769d3cd AC |
1528 | |
1529 | ||
a8c99f38 | 1530 | /* Signal trampoline stack frames. */ |
5769d3cd | 1531 | |
a8c99f38 JB |
1532 | struct s390_sigtramp_unwind_cache { |
1533 | CORE_ADDR frame_base; | |
1534 | struct trad_frame_saved_reg *saved_regs; | |
1535 | }; | |
5769d3cd | 1536 | |
a8c99f38 JB |
1537 | static struct s390_sigtramp_unwind_cache * |
1538 | s390_sigtramp_frame_unwind_cache (struct frame_info *next_frame, | |
1539 | void **this_prologue_cache) | |
5769d3cd | 1540 | { |
a8c99f38 JB |
1541 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
1542 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
1543 | struct s390_sigtramp_unwind_cache *info; | |
1544 | ULONGEST this_sp, prev_sp; | |
1545 | CORE_ADDR next_ra, next_cfa, sigreg_ptr; | |
1546 | int i; | |
1547 | ||
1548 | if (*this_prologue_cache) | |
1549 | return *this_prologue_cache; | |
5769d3cd | 1550 | |
a8c99f38 JB |
1551 | info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache); |
1552 | *this_prologue_cache = info; | |
1553 | info->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
1554 | ||
1555 | this_sp = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM); | |
1556 | next_ra = frame_pc_unwind (next_frame); | |
1557 | next_cfa = this_sp + 16*word_size + 32; | |
1558 | ||
1559 | /* New-style RT frame: | |
1560 | retcode + alignment (8 bytes) | |
1561 | siginfo (128 bytes) | |
1562 | ucontext (contains sigregs at offset 5 words) */ | |
1563 | if (next_ra == next_cfa) | |
1564 | { | |
f0f63663 | 1565 | sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8); |
a8c99f38 JB |
1566 | } |
1567 | ||
1568 | /* Old-style RT frame and all non-RT frames: | |
1569 | old signal mask (8 bytes) | |
1570 | pointer to sigregs */ | |
5769d3cd AC |
1571 | else |
1572 | { | |
a8c99f38 JB |
1573 | sigreg_ptr = read_memory_unsigned_integer (next_cfa + 8, word_size); |
1574 | } | |
5769d3cd | 1575 | |
a8c99f38 JB |
1576 | /* The sigregs structure looks like this: |
1577 | long psw_mask; | |
1578 | long psw_addr; | |
1579 | long gprs[16]; | |
1580 | int acrs[16]; | |
1581 | int fpc; | |
1582 | int __pad; | |
1583 | double fprs[16]; */ | |
5769d3cd | 1584 | |
a8c99f38 JB |
1585 | /* Let's ignore the PSW mask, it will not be restored anyway. */ |
1586 | sigreg_ptr += word_size; | |
1587 | ||
1588 | /* Next comes the PSW address. */ | |
1589 | info->saved_regs[S390_PC_REGNUM].addr = sigreg_ptr; | |
1590 | sigreg_ptr += word_size; | |
1591 | ||
1592 | /* Then the GPRs. */ | |
1593 | for (i = 0; i < 16; i++) | |
1594 | { | |
1595 | info->saved_regs[S390_R0_REGNUM + i].addr = sigreg_ptr; | |
1596 | sigreg_ptr += word_size; | |
1597 | } | |
1598 | ||
1599 | /* Then the ACRs. */ | |
1600 | for (i = 0; i < 16; i++) | |
1601 | { | |
1602 | info->saved_regs[S390_A0_REGNUM + i].addr = sigreg_ptr; | |
1603 | sigreg_ptr += 4; | |
5769d3cd | 1604 | } |
5769d3cd | 1605 | |
a8c99f38 JB |
1606 | /* The floating-point control word. */ |
1607 | info->saved_regs[S390_FPC_REGNUM].addr = sigreg_ptr; | |
1608 | sigreg_ptr += 8; | |
5769d3cd | 1609 | |
a8c99f38 JB |
1610 | /* And finally the FPRs. */ |
1611 | for (i = 0; i < 16; i++) | |
1612 | { | |
1613 | info->saved_regs[S390_F0_REGNUM + i].addr = sigreg_ptr; | |
1614 | sigreg_ptr += 8; | |
1615 | } | |
1616 | ||
1617 | /* Restore the previous frame's SP. */ | |
1618 | prev_sp = read_memory_unsigned_integer ( | |
1619 | info->saved_regs[S390_SP_REGNUM].addr, | |
1620 | word_size); | |
5769d3cd | 1621 | |
a8c99f38 JB |
1622 | /* Determine our frame base. */ |
1623 | info->frame_base = prev_sp + 16*word_size + 32; | |
5769d3cd | 1624 | |
a8c99f38 | 1625 | return info; |
5769d3cd AC |
1626 | } |
1627 | ||
a8c99f38 JB |
1628 | static void |
1629 | s390_sigtramp_frame_this_id (struct frame_info *next_frame, | |
1630 | void **this_prologue_cache, | |
1631 | struct frame_id *this_id) | |
5769d3cd | 1632 | { |
a8c99f38 JB |
1633 | struct s390_sigtramp_unwind_cache *info |
1634 | = s390_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
1635 | *this_id = frame_id_build (info->frame_base, frame_pc_unwind (next_frame)); | |
5769d3cd AC |
1636 | } |
1637 | ||
4c8287ac | 1638 | static void |
a8c99f38 JB |
1639 | s390_sigtramp_frame_prev_register (struct frame_info *next_frame, |
1640 | void **this_prologue_cache, | |
1641 | int regnum, int *optimizedp, | |
1642 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
f127898a | 1643 | int *realnump, gdb_byte *bufferp) |
a8c99f38 JB |
1644 | { |
1645 | struct s390_sigtramp_unwind_cache *info | |
1646 | = s390_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
1f67027d AC |
1647 | trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, |
1648 | optimizedp, lvalp, addrp, realnump, bufferp); | |
a8c99f38 JB |
1649 | } |
1650 | ||
1651 | static const struct frame_unwind s390_sigtramp_frame_unwind = { | |
1652 | SIGTRAMP_FRAME, | |
1653 | s390_sigtramp_frame_this_id, | |
1654 | s390_sigtramp_frame_prev_register | |
1655 | }; | |
1656 | ||
1657 | static const struct frame_unwind * | |
1658 | s390_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
5769d3cd | 1659 | { |
a8c99f38 JB |
1660 | CORE_ADDR pc = frame_pc_unwind (next_frame); |
1661 | bfd_byte sigreturn[2]; | |
4c8287ac | 1662 | |
359a9262 | 1663 | if (read_memory_nobpt (pc, sigreturn, 2)) |
a8c99f38 | 1664 | return NULL; |
4c8287ac | 1665 | |
a8c99f38 JB |
1666 | if (sigreturn[0] != 0x0a /* svc */) |
1667 | return NULL; | |
5769d3cd | 1668 | |
a8c99f38 JB |
1669 | if (sigreturn[1] != 119 /* sigreturn */ |
1670 | && sigreturn[1] != 173 /* rt_sigreturn */) | |
1671 | return NULL; | |
1672 | ||
1673 | return &s390_sigtramp_frame_unwind; | |
5769d3cd AC |
1674 | } |
1675 | ||
4c8287ac | 1676 | |
a8c99f38 JB |
1677 | /* Frame base handling. */ |
1678 | ||
1679 | static CORE_ADDR | |
1680 | s390_frame_base_address (struct frame_info *next_frame, void **this_cache) | |
4c8287ac | 1681 | { |
a8c99f38 JB |
1682 | struct s390_unwind_cache *info |
1683 | = s390_frame_unwind_cache (next_frame, this_cache); | |
1684 | return info->frame_base; | |
1685 | } | |
1686 | ||
1687 | static CORE_ADDR | |
1688 | s390_local_base_address (struct frame_info *next_frame, void **this_cache) | |
1689 | { | |
1690 | struct s390_unwind_cache *info | |
1691 | = s390_frame_unwind_cache (next_frame, this_cache); | |
1692 | return info->local_base; | |
1693 | } | |
1694 | ||
1695 | static const struct frame_base s390_frame_base = { | |
1696 | &s390_frame_unwind, | |
1697 | s390_frame_base_address, | |
1698 | s390_local_base_address, | |
1699 | s390_local_base_address | |
1700 | }; | |
1701 | ||
1702 | static CORE_ADDR | |
1703 | s390_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
1704 | { | |
1705 | ULONGEST pc; | |
1706 | pc = frame_unwind_register_unsigned (next_frame, S390_PC_REGNUM); | |
1707 | return gdbarch_addr_bits_remove (gdbarch, pc); | |
1708 | } | |
1709 | ||
1710 | static CORE_ADDR | |
1711 | s390_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
1712 | { | |
1713 | ULONGEST sp; | |
1714 | sp = frame_unwind_register_unsigned (next_frame, S390_SP_REGNUM); | |
1715 | return gdbarch_addr_bits_remove (gdbarch, sp); | |
4c8287ac JB |
1716 | } |
1717 | ||
1718 | ||
a431654a AC |
1719 | /* DWARF-2 frame support. */ |
1720 | ||
1721 | static void | |
1722 | s390_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, | |
aff37fc1 DM |
1723 | struct dwarf2_frame_state_reg *reg, |
1724 | struct frame_info *next_frame) | |
a431654a AC |
1725 | { |
1726 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
1727 | ||
1728 | switch (tdep->abi) | |
1729 | { | |
1730 | case ABI_LINUX_S390: | |
1731 | /* Call-saved registers. */ | |
1732 | if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM) | |
1733 | || regnum == S390_F4_REGNUM | |
1734 | || regnum == S390_F6_REGNUM) | |
1735 | reg->how = DWARF2_FRAME_REG_SAME_VALUE; | |
1736 | ||
1737 | /* Call-clobbered registers. */ | |
1738 | else if ((regnum >= S390_R0_REGNUM && regnum <= S390_R5_REGNUM) | |
1739 | || (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM | |
1740 | && regnum != S390_F4_REGNUM && regnum != S390_F6_REGNUM)) | |
1741 | reg->how = DWARF2_FRAME_REG_UNDEFINED; | |
1742 | ||
1743 | /* The return address column. */ | |
1744 | else if (regnum == S390_PC_REGNUM) | |
1745 | reg->how = DWARF2_FRAME_REG_RA; | |
1746 | break; | |
1747 | ||
1748 | case ABI_LINUX_ZSERIES: | |
1749 | /* Call-saved registers. */ | |
1750 | if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM) | |
1751 | || (regnum >= S390_F8_REGNUM && regnum <= S390_F15_REGNUM)) | |
1752 | reg->how = DWARF2_FRAME_REG_SAME_VALUE; | |
1753 | ||
1754 | /* Call-clobbered registers. */ | |
1755 | else if ((regnum >= S390_R0_REGNUM && regnum <= S390_R5_REGNUM) | |
1756 | || (regnum >= S390_F0_REGNUM && regnum <= S390_F7_REGNUM)) | |
1757 | reg->how = DWARF2_FRAME_REG_UNDEFINED; | |
1758 | ||
1759 | /* The return address column. */ | |
1760 | else if (regnum == S390_PC_REGNUM) | |
1761 | reg->how = DWARF2_FRAME_REG_RA; | |
1762 | break; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | ||
b0cf273e JB |
1767 | /* Dummy function calls. */ |
1768 | ||
78f8b424 JB |
1769 | /* Return non-zero if TYPE is an integer-like type, zero otherwise. |
1770 | "Integer-like" types are those that should be passed the way | |
1771 | integers are: integers, enums, ranges, characters, and booleans. */ | |
1772 | static int | |
1773 | is_integer_like (struct type *type) | |
1774 | { | |
1775 | enum type_code code = TYPE_CODE (type); | |
1776 | ||
1777 | return (code == TYPE_CODE_INT | |
1778 | || code == TYPE_CODE_ENUM | |
1779 | || code == TYPE_CODE_RANGE | |
1780 | || code == TYPE_CODE_CHAR | |
1781 | || code == TYPE_CODE_BOOL); | |
1782 | } | |
1783 | ||
78f8b424 JB |
1784 | /* Return non-zero if TYPE is a pointer-like type, zero otherwise. |
1785 | "Pointer-like" types are those that should be passed the way | |
1786 | pointers are: pointers and references. */ | |
1787 | static int | |
1788 | is_pointer_like (struct type *type) | |
1789 | { | |
1790 | enum type_code code = TYPE_CODE (type); | |
1791 | ||
1792 | return (code == TYPE_CODE_PTR | |
1793 | || code == TYPE_CODE_REF); | |
1794 | } | |
1795 | ||
1796 | ||
20a940cc JB |
1797 | /* Return non-zero if TYPE is a `float singleton' or `double |
1798 | singleton', zero otherwise. | |
1799 | ||
1800 | A `T singleton' is a struct type with one member, whose type is | |
1801 | either T or a `T singleton'. So, the following are all float | |
1802 | singletons: | |
1803 | ||
1804 | struct { float x }; | |
1805 | struct { struct { float x; } x; }; | |
1806 | struct { struct { struct { float x; } x; } x; }; | |
1807 | ||
1808 | ... and so on. | |
1809 | ||
b0cf273e JB |
1810 | All such structures are passed as if they were floats or doubles, |
1811 | as the (revised) ABI says. */ | |
20a940cc JB |
1812 | static int |
1813 | is_float_singleton (struct type *type) | |
1814 | { | |
b0cf273e JB |
1815 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_NFIELDS (type) == 1) |
1816 | { | |
1817 | struct type *singleton_type = TYPE_FIELD_TYPE (type, 0); | |
1818 | CHECK_TYPEDEF (singleton_type); | |
1819 | ||
1820 | return (TYPE_CODE (singleton_type) == TYPE_CODE_FLT | |
1821 | || is_float_singleton (singleton_type)); | |
1822 | } | |
1823 | ||
1824 | return 0; | |
20a940cc JB |
1825 | } |
1826 | ||
1827 | ||
1828 | /* Return non-zero if TYPE is a struct-like type, zero otherwise. | |
1829 | "Struct-like" types are those that should be passed as structs are: | |
1830 | structs and unions. | |
1831 | ||
1832 | As an odd quirk, not mentioned in the ABI, GCC passes float and | |
1833 | double singletons as if they were a plain float, double, etc. (The | |
1834 | corresponding union types are handled normally.) So we exclude | |
1835 | those types here. *shrug* */ | |
1836 | static int | |
1837 | is_struct_like (struct type *type) | |
1838 | { | |
1839 | enum type_code code = TYPE_CODE (type); | |
1840 | ||
1841 | return (code == TYPE_CODE_UNION | |
1842 | || (code == TYPE_CODE_STRUCT && ! is_float_singleton (type))); | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* Return non-zero if TYPE is a float-like type, zero otherwise. | |
1847 | "Float-like" types are those that should be passed as | |
1848 | floating-point values are. | |
1849 | ||
1850 | You'd think this would just be floats, doubles, long doubles, etc. | |
1851 | But as an odd quirk, not mentioned in the ABI, GCC passes float and | |
1852 | double singletons as if they were a plain float, double, etc. (The | |
4d819d0e | 1853 | corresponding union types are handled normally.) So we include |
20a940cc JB |
1854 | those types here. *shrug* */ |
1855 | static int | |
1856 | is_float_like (struct type *type) | |
1857 | { | |
1858 | return (TYPE_CODE (type) == TYPE_CODE_FLT | |
1859 | || is_float_singleton (type)); | |
1860 | } | |
1861 | ||
1862 | ||
78f8b424 | 1863 | static int |
b0cf273e | 1864 | is_power_of_two (unsigned int n) |
78f8b424 | 1865 | { |
b0cf273e | 1866 | return ((n & (n - 1)) == 0); |
78f8b424 JB |
1867 | } |
1868 | ||
b0cf273e JB |
1869 | /* Return non-zero if TYPE should be passed as a pointer to a copy, |
1870 | zero otherwise. */ | |
4d819d0e | 1871 | static int |
b0cf273e | 1872 | s390_function_arg_pass_by_reference (struct type *type) |
4d819d0e JB |
1873 | { |
1874 | unsigned length = TYPE_LENGTH (type); | |
b0cf273e JB |
1875 | if (length > 8) |
1876 | return 1; | |
4d819d0e | 1877 | |
b0cf273e JB |
1878 | /* FIXME: All complex and vector types are also returned by reference. */ |
1879 | return is_struct_like (type) && !is_power_of_two (length); | |
4d819d0e JB |
1880 | } |
1881 | ||
b0cf273e JB |
1882 | /* Return non-zero if TYPE should be passed in a float register |
1883 | if possible. */ | |
78f8b424 | 1884 | static int |
b0cf273e | 1885 | s390_function_arg_float (struct type *type) |
78f8b424 | 1886 | { |
78f8b424 | 1887 | unsigned length = TYPE_LENGTH (type); |
b0cf273e JB |
1888 | if (length > 8) |
1889 | return 0; | |
78f8b424 | 1890 | |
b0cf273e | 1891 | return is_float_like (type); |
4d819d0e JB |
1892 | } |
1893 | ||
b0cf273e JB |
1894 | /* Return non-zero if TYPE should be passed in an integer register |
1895 | (or a pair of integer registers) if possible. */ | |
78f8b424 | 1896 | static int |
b0cf273e | 1897 | s390_function_arg_integer (struct type *type) |
78f8b424 | 1898 | { |
78f8b424 | 1899 | unsigned length = TYPE_LENGTH (type); |
b0cf273e JB |
1900 | if (length > 8) |
1901 | return 0; | |
78f8b424 | 1902 | |
b0cf273e JB |
1903 | return is_integer_like (type) |
1904 | || is_pointer_like (type) | |
1905 | || (is_struct_like (type) && is_power_of_two (length)); | |
78f8b424 JB |
1906 | } |
1907 | ||
78f8b424 JB |
1908 | /* Return ARG, a `SIMPLE_ARG', sign-extended or zero-extended to a full |
1909 | word as required for the ABI. */ | |
1910 | static LONGEST | |
1911 | extend_simple_arg (struct value *arg) | |
1912 | { | |
4991999e | 1913 | struct type *type = value_type (arg); |
78f8b424 JB |
1914 | |
1915 | /* Even structs get passed in the least significant bits of the | |
1916 | register / memory word. It's not really right to extract them as | |
1917 | an integer, but it does take care of the extension. */ | |
1918 | if (TYPE_UNSIGNED (type)) | |
0fd88904 | 1919 | return extract_unsigned_integer (value_contents (arg), |
78f8b424 JB |
1920 | TYPE_LENGTH (type)); |
1921 | else | |
0fd88904 | 1922 | return extract_signed_integer (value_contents (arg), |
78f8b424 JB |
1923 | TYPE_LENGTH (type)); |
1924 | } | |
1925 | ||
1926 | ||
78f8b424 JB |
1927 | /* Return the alignment required by TYPE. */ |
1928 | static int | |
1929 | alignment_of (struct type *type) | |
1930 | { | |
1931 | int alignment; | |
1932 | ||
1933 | if (is_integer_like (type) | |
1934 | || is_pointer_like (type) | |
1935 | || TYPE_CODE (type) == TYPE_CODE_FLT) | |
1936 | alignment = TYPE_LENGTH (type); | |
1937 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1938 | || TYPE_CODE (type) == TYPE_CODE_UNION) | |
1939 | { | |
1940 | int i; | |
1941 | ||
1942 | alignment = 1; | |
1943 | for (i = 0; i < TYPE_NFIELDS (type); i++) | |
1944 | { | |
1945 | int field_alignment = alignment_of (TYPE_FIELD_TYPE (type, i)); | |
1946 | ||
1947 | if (field_alignment > alignment) | |
1948 | alignment = field_alignment; | |
1949 | } | |
1950 | } | |
1951 | else | |
1952 | alignment = 1; | |
1953 | ||
1954 | /* Check that everything we ever return is a power of two. Lots of | |
1955 | code doesn't want to deal with aligning things to arbitrary | |
1956 | boundaries. */ | |
1957 | gdb_assert ((alignment & (alignment - 1)) == 0); | |
1958 | ||
1959 | return alignment; | |
1960 | } | |
1961 | ||
1962 | ||
1963 | /* Put the actual parameter values pointed to by ARGS[0..NARGS-1] in | |
ca557f44 AC |
1964 | place to be passed to a function, as specified by the "GNU/Linux |
1965 | for S/390 ELF Application Binary Interface Supplement". | |
78f8b424 JB |
1966 | |
1967 | SP is the current stack pointer. We must put arguments, links, | |
1968 | padding, etc. whereever they belong, and return the new stack | |
1969 | pointer value. | |
1970 | ||
1971 | If STRUCT_RETURN is non-zero, then the function we're calling is | |
1972 | going to return a structure by value; STRUCT_ADDR is the address of | |
1973 | a block we've allocated for it on the stack. | |
1974 | ||
1975 | Our caller has taken care of any type promotions needed to satisfy | |
1976 | prototypes or the old K&R argument-passing rules. */ | |
a78f21af | 1977 | static CORE_ADDR |
7d9b040b | 1978 | s390_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
b0cf273e JB |
1979 | struct regcache *regcache, CORE_ADDR bp_addr, |
1980 | int nargs, struct value **args, CORE_ADDR sp, | |
1981 | int struct_return, CORE_ADDR struct_addr) | |
5769d3cd | 1982 | { |
b0cf273e JB |
1983 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1984 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; | |
1985 | ULONGEST orig_sp; | |
78f8b424 | 1986 | int i; |
5769d3cd | 1987 | |
78f8b424 JB |
1988 | /* If the i'th argument is passed as a reference to a copy, then |
1989 | copy_addr[i] is the address of the copy we made. */ | |
1990 | CORE_ADDR *copy_addr = alloca (nargs * sizeof (CORE_ADDR)); | |
5769d3cd | 1991 | |
78f8b424 | 1992 | /* Build the reference-to-copy area. */ |
78f8b424 JB |
1993 | for (i = 0; i < nargs; i++) |
1994 | { | |
1995 | struct value *arg = args[i]; | |
4991999e | 1996 | struct type *type = value_type (arg); |
78f8b424 | 1997 | unsigned length = TYPE_LENGTH (type); |
5769d3cd | 1998 | |
b0cf273e | 1999 | if (s390_function_arg_pass_by_reference (type)) |
01c464e9 | 2000 | { |
78f8b424 | 2001 | sp -= length; |
5b03f266 | 2002 | sp = align_down (sp, alignment_of (type)); |
0fd88904 | 2003 | write_memory (sp, value_contents (arg), length); |
78f8b424 | 2004 | copy_addr[i] = sp; |
01c464e9 | 2005 | } |
5769d3cd | 2006 | } |
5769d3cd | 2007 | |
78f8b424 JB |
2008 | /* Reserve space for the parameter area. As a conservative |
2009 | simplification, we assume that everything will be passed on the | |
b0cf273e JB |
2010 | stack. Since every argument larger than 8 bytes will be |
2011 | passed by reference, we use this simple upper bound. */ | |
2012 | sp -= nargs * 8; | |
78f8b424 | 2013 | |
78f8b424 JB |
2014 | /* After all that, make sure it's still aligned on an eight-byte |
2015 | boundary. */ | |
5b03f266 | 2016 | sp = align_down (sp, 8); |
78f8b424 JB |
2017 | |
2018 | /* Finally, place the actual parameters, working from SP towards | |
2019 | higher addresses. The code above is supposed to reserve enough | |
2020 | space for this. */ | |
2021 | { | |
2022 | int fr = 0; | |
2023 | int gr = 2; | |
2024 | CORE_ADDR starg = sp; | |
2025 | ||
b0cf273e | 2026 | /* A struct is returned using general register 2. */ |
4d819d0e | 2027 | if (struct_return) |
b0cf273e JB |
2028 | { |
2029 | regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr, | |
2030 | struct_addr); | |
2031 | gr++; | |
2032 | } | |
4d819d0e | 2033 | |
78f8b424 JB |
2034 | for (i = 0; i < nargs; i++) |
2035 | { | |
2036 | struct value *arg = args[i]; | |
4991999e | 2037 | struct type *type = value_type (arg); |
b0cf273e JB |
2038 | unsigned length = TYPE_LENGTH (type); |
2039 | ||
2040 | if (s390_function_arg_pass_by_reference (type)) | |
2041 | { | |
2042 | if (gr <= 6) | |
2043 | { | |
2044 | regcache_cooked_write_unsigned (regcache, S390_R0_REGNUM + gr, | |
2045 | copy_addr[i]); | |
2046 | gr++; | |
2047 | } | |
2048 | else | |
2049 | { | |
2050 | write_memory_unsigned_integer (starg, word_size, copy_addr[i]); | |
2051 | starg += word_size; | |
2052 | } | |
2053 | } | |
2054 | else if (s390_function_arg_float (type)) | |
2055 | { | |
2056 | /* The GNU/Linux for S/390 ABI uses FPRs 0 and 2 to pass arguments, | |
2057 | the GNU/Linux for zSeries ABI uses 0, 2, 4, and 6. */ | |
2058 | if (fr <= (tdep->abi == ABI_LINUX_S390 ? 2 : 6)) | |
2059 | { | |
2060 | /* When we store a single-precision value in an FP register, | |
2061 | it occupies the leftmost bits. */ | |
2062 | regcache_cooked_write_part (regcache, S390_F0_REGNUM + fr, | |
0fd88904 | 2063 | 0, length, value_contents (arg)); |
b0cf273e JB |
2064 | fr += 2; |
2065 | } | |
2066 | else | |
2067 | { | |
2068 | /* When we store a single-precision value in a stack slot, | |
2069 | it occupies the rightmost bits. */ | |
2070 | starg = align_up (starg + length, word_size); | |
0fd88904 | 2071 | write_memory (starg - length, value_contents (arg), length); |
b0cf273e JB |
2072 | } |
2073 | } | |
2074 | else if (s390_function_arg_integer (type) && length <= word_size) | |
2075 | { | |
2076 | if (gr <= 6) | |
2077 | { | |
2078 | /* Integer arguments are always extended to word size. */ | |
2079 | regcache_cooked_write_signed (regcache, S390_R0_REGNUM + gr, | |
2080 | extend_simple_arg (arg)); | |
2081 | gr++; | |
2082 | } | |
2083 | else | |
2084 | { | |
2085 | /* Integer arguments are always extended to word size. */ | |
2086 | write_memory_signed_integer (starg, word_size, | |
2087 | extend_simple_arg (arg)); | |
2088 | starg += word_size; | |
2089 | } | |
2090 | } | |
2091 | else if (s390_function_arg_integer (type) && length == 2*word_size) | |
2092 | { | |
2093 | if (gr <= 5) | |
2094 | { | |
2095 | regcache_cooked_write (regcache, S390_R0_REGNUM + gr, | |
0fd88904 | 2096 | value_contents (arg)); |
b0cf273e | 2097 | regcache_cooked_write (regcache, S390_R0_REGNUM + gr + 1, |
0fd88904 | 2098 | value_contents (arg) + word_size); |
b0cf273e JB |
2099 | gr += 2; |
2100 | } | |
2101 | else | |
2102 | { | |
2103 | /* If we skipped r6 because we couldn't fit a DOUBLE_ARG | |
2104 | in it, then don't go back and use it again later. */ | |
2105 | gr = 7; | |
2106 | ||
0fd88904 | 2107 | write_memory (starg, value_contents (arg), length); |
b0cf273e JB |
2108 | starg += length; |
2109 | } | |
2110 | } | |
2111 | else | |
e2e0b3e5 | 2112 | internal_error (__FILE__, __LINE__, _("unknown argument type")); |
78f8b424 JB |
2113 | } |
2114 | } | |
2115 | ||
2116 | /* Allocate the standard frame areas: the register save area, the | |
2117 | word reserved for the compiler (which seems kind of meaningless), | |
2118 | and the back chain pointer. */ | |
b0cf273e | 2119 | sp -= 16*word_size + 32; |
78f8b424 | 2120 | |
b0cf273e JB |
2121 | /* Store return address. */ |
2122 | regcache_cooked_write_unsigned (regcache, S390_RETADDR_REGNUM, bp_addr); | |
2123 | ||
2124 | /* Store updated stack pointer. */ | |
2125 | regcache_cooked_write_unsigned (regcache, S390_SP_REGNUM, sp); | |
78f8b424 | 2126 | |
a8c99f38 | 2127 | /* We need to return the 'stack part' of the frame ID, |
121d8485 UW |
2128 | which is actually the top of the register save area. */ |
2129 | return sp + 16*word_size + 32; | |
5769d3cd AC |
2130 | } |
2131 | ||
b0cf273e JB |
2132 | /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that |
2133 | dummy frame. The frame ID's base needs to match the TOS value | |
2134 | returned by push_dummy_call, and the PC match the dummy frame's | |
2135 | breakpoint. */ | |
2136 | static struct frame_id | |
2137 | s390_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
2138 | { | |
a8c99f38 | 2139 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
121d8485 | 2140 | CORE_ADDR sp = s390_unwind_sp (gdbarch, next_frame); |
a8c99f38 | 2141 | |
121d8485 | 2142 | return frame_id_build (sp + 16*word_size + 32, |
a8c99f38 | 2143 | frame_pc_unwind (next_frame)); |
b0cf273e | 2144 | } |
c8f9d51c | 2145 | |
4074e13c JB |
2146 | static CORE_ADDR |
2147 | s390_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
2148 | { | |
2149 | /* Both the 32- and 64-bit ABI's say that the stack pointer should | |
2150 | always be aligned on an eight-byte boundary. */ | |
2151 | return (addr & -8); | |
2152 | } | |
2153 | ||
2154 | ||
b0cf273e JB |
2155 | /* Function return value access. */ |
2156 | ||
2157 | static enum return_value_convention | |
2158 | s390_return_value_convention (struct gdbarch *gdbarch, struct type *type) | |
c8f9d51c | 2159 | { |
b0cf273e JB |
2160 | int length = TYPE_LENGTH (type); |
2161 | if (length > 8) | |
2162 | return RETURN_VALUE_STRUCT_CONVENTION; | |
2163 | ||
2164 | switch (TYPE_CODE (type)) | |
2165 | { | |
2166 | case TYPE_CODE_STRUCT: | |
2167 | case TYPE_CODE_UNION: | |
2168 | case TYPE_CODE_ARRAY: | |
2169 | return RETURN_VALUE_STRUCT_CONVENTION; | |
c8f9d51c | 2170 | |
b0cf273e JB |
2171 | default: |
2172 | return RETURN_VALUE_REGISTER_CONVENTION; | |
2173 | } | |
c8f9d51c JB |
2174 | } |
2175 | ||
b0cf273e JB |
2176 | static enum return_value_convention |
2177 | s390_return_value (struct gdbarch *gdbarch, struct type *type, | |
2e82d168 UW |
2178 | struct regcache *regcache, gdb_byte *out, |
2179 | const gdb_byte *in) | |
5769d3cd | 2180 | { |
b0cf273e JB |
2181 | int word_size = gdbarch_ptr_bit (gdbarch) / 8; |
2182 | int length = TYPE_LENGTH (type); | |
2183 | enum return_value_convention rvc = | |
2184 | s390_return_value_convention (gdbarch, type); | |
2185 | if (in) | |
2186 | { | |
2187 | switch (rvc) | |
2188 | { | |
2189 | case RETURN_VALUE_REGISTER_CONVENTION: | |
2190 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
2191 | { | |
2192 | /* When we store a single-precision value in an FP register, | |
2193 | it occupies the leftmost bits. */ | |
2194 | regcache_cooked_write_part (regcache, S390_F0_REGNUM, | |
2195 | 0, length, in); | |
2196 | } | |
2197 | else if (length <= word_size) | |
2198 | { | |
2199 | /* Integer arguments are always extended to word size. */ | |
2200 | if (TYPE_UNSIGNED (type)) | |
2201 | regcache_cooked_write_unsigned (regcache, S390_R2_REGNUM, | |
2202 | extract_unsigned_integer (in, length)); | |
2203 | else | |
2204 | regcache_cooked_write_signed (regcache, S390_R2_REGNUM, | |
2205 | extract_signed_integer (in, length)); | |
2206 | } | |
2207 | else if (length == 2*word_size) | |
2208 | { | |
2209 | regcache_cooked_write (regcache, S390_R2_REGNUM, in); | |
43af2100 | 2210 | regcache_cooked_write (regcache, S390_R3_REGNUM, in + word_size); |
b0cf273e JB |
2211 | } |
2212 | else | |
e2e0b3e5 | 2213 | internal_error (__FILE__, __LINE__, _("invalid return type")); |
b0cf273e JB |
2214 | break; |
2215 | ||
2216 | case RETURN_VALUE_STRUCT_CONVENTION: | |
8a3fe4f8 | 2217 | error (_("Cannot set function return value.")); |
b0cf273e JB |
2218 | break; |
2219 | } | |
2220 | } | |
2221 | else if (out) | |
2222 | { | |
2223 | switch (rvc) | |
2224 | { | |
2225 | case RETURN_VALUE_REGISTER_CONVENTION: | |
2226 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
2227 | { | |
2228 | /* When we store a single-precision value in an FP register, | |
2229 | it occupies the leftmost bits. */ | |
2230 | regcache_cooked_read_part (regcache, S390_F0_REGNUM, | |
2231 | 0, length, out); | |
2232 | } | |
2233 | else if (length <= word_size) | |
2234 | { | |
2235 | /* Integer arguments occupy the rightmost bits. */ | |
2236 | regcache_cooked_read_part (regcache, S390_R2_REGNUM, | |
2237 | word_size - length, length, out); | |
2238 | } | |
2239 | else if (length == 2*word_size) | |
2240 | { | |
2241 | regcache_cooked_read (regcache, S390_R2_REGNUM, out); | |
43af2100 | 2242 | regcache_cooked_read (regcache, S390_R3_REGNUM, out + word_size); |
b0cf273e JB |
2243 | } |
2244 | else | |
e2e0b3e5 | 2245 | internal_error (__FILE__, __LINE__, _("invalid return type")); |
b0cf273e | 2246 | break; |
5769d3cd | 2247 | |
b0cf273e | 2248 | case RETURN_VALUE_STRUCT_CONVENTION: |
8a3fe4f8 | 2249 | error (_("Function return value unknown.")); |
b0cf273e JB |
2250 | break; |
2251 | } | |
2252 | } | |
2253 | ||
2254 | return rvc; | |
2255 | } | |
5769d3cd AC |
2256 | |
2257 | ||
a8c99f38 JB |
2258 | /* Breakpoints. */ |
2259 | ||
43af2100 | 2260 | static const gdb_byte * |
5769d3cd AC |
2261 | s390_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
2262 | { | |
43af2100 | 2263 | static const gdb_byte breakpoint[] = { 0x0, 0x1 }; |
5769d3cd AC |
2264 | |
2265 | *lenptr = sizeof (breakpoint); | |
2266 | return breakpoint; | |
2267 | } | |
2268 | ||
5769d3cd | 2269 | |
a8c99f38 | 2270 | /* Address handling. */ |
5769d3cd AC |
2271 | |
2272 | static CORE_ADDR | |
2273 | s390_addr_bits_remove (CORE_ADDR addr) | |
2274 | { | |
a8c99f38 | 2275 | return addr & 0x7fffffff; |
5769d3cd AC |
2276 | } |
2277 | ||
ffc65945 KB |
2278 | static int |
2279 | s390_address_class_type_flags (int byte_size, int dwarf2_addr_class) | |
2280 | { | |
2281 | if (byte_size == 4) | |
2282 | return TYPE_FLAG_ADDRESS_CLASS_1; | |
2283 | else | |
2284 | return 0; | |
2285 | } | |
2286 | ||
2287 | static const char * | |
2288 | s390_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags) | |
2289 | { | |
2290 | if (type_flags & TYPE_FLAG_ADDRESS_CLASS_1) | |
2291 | return "mode32"; | |
2292 | else | |
2293 | return NULL; | |
2294 | } | |
2295 | ||
a78f21af | 2296 | static int |
ffc65945 KB |
2297 | s390_address_class_name_to_type_flags (struct gdbarch *gdbarch, const char *name, |
2298 | int *type_flags_ptr) | |
2299 | { | |
2300 | if (strcmp (name, "mode32") == 0) | |
2301 | { | |
2302 | *type_flags_ptr = TYPE_FLAG_ADDRESS_CLASS_1; | |
2303 | return 1; | |
2304 | } | |
2305 | else | |
2306 | return 0; | |
2307 | } | |
2308 | ||
a8c99f38 JB |
2309 | /* Set up gdbarch struct. */ |
2310 | ||
a78f21af | 2311 | static struct gdbarch * |
5769d3cd AC |
2312 | s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
2313 | { | |
5769d3cd AC |
2314 | struct gdbarch *gdbarch; |
2315 | struct gdbarch_tdep *tdep; | |
5769d3cd AC |
2316 | |
2317 | /* First see if there is already a gdbarch that can satisfy the request. */ | |
2318 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
2319 | if (arches != NULL) | |
2320 | return arches->gdbarch; | |
2321 | ||
2322 | /* None found: is the request for a s390 architecture? */ | |
2323 | if (info.bfd_arch_info->arch != bfd_arch_s390) | |
2324 | return NULL; /* No; then it's not for us. */ | |
2325 | ||
2326 | /* Yes: create a new gdbarch for the specified machine type. */ | |
d0f54f9d JB |
2327 | tdep = XCALLOC (1, struct gdbarch_tdep); |
2328 | gdbarch = gdbarch_alloc (&info, tdep); | |
5769d3cd AC |
2329 | |
2330 | set_gdbarch_believe_pcc_promotion (gdbarch, 0); | |
4e409299 | 2331 | set_gdbarch_char_signed (gdbarch, 0); |
5769d3cd | 2332 | |
aaab4dba | 2333 | /* Amount PC must be decremented by after a breakpoint. This is |
3b3b875c | 2334 | often the number of bytes returned by gdbarch_breakpoint_from_pc but not |
aaab4dba | 2335 | always. */ |
5769d3cd | 2336 | set_gdbarch_decr_pc_after_break (gdbarch, 2); |
5769d3cd AC |
2337 | /* Stack grows downward. */ |
2338 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
5769d3cd AC |
2339 | set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc); |
2340 | set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue); | |
d0f54f9d | 2341 | set_gdbarch_in_function_epilogue_p (gdbarch, s390_in_function_epilogue_p); |
a8c99f38 | 2342 | |
5769d3cd AC |
2343 | set_gdbarch_pc_regnum (gdbarch, S390_PC_REGNUM); |
2344 | set_gdbarch_sp_regnum (gdbarch, S390_SP_REGNUM); | |
d0f54f9d | 2345 | set_gdbarch_fp0_regnum (gdbarch, S390_F0_REGNUM); |
5769d3cd | 2346 | set_gdbarch_num_regs (gdbarch, S390_NUM_REGS); |
d0f54f9d | 2347 | set_gdbarch_num_pseudo_regs (gdbarch, S390_NUM_PSEUDO_REGS); |
5769d3cd | 2348 | set_gdbarch_register_name (gdbarch, s390_register_name); |
d0f54f9d JB |
2349 | set_gdbarch_register_type (gdbarch, s390_register_type); |
2350 | set_gdbarch_stab_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum); | |
2351 | set_gdbarch_dwarf_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum); | |
2352 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_dwarf_reg_to_regnum); | |
9acbedc0 | 2353 | set_gdbarch_value_from_register (gdbarch, s390_value_from_register); |
d0f54f9d JB |
2354 | set_gdbarch_register_reggroup_p (gdbarch, s390_register_reggroup_p); |
2355 | set_gdbarch_regset_from_core_section (gdbarch, | |
2356 | s390_regset_from_core_section); | |
5769d3cd | 2357 | |
b0cf273e JB |
2358 | /* Inferior function calls. */ |
2359 | set_gdbarch_push_dummy_call (gdbarch, s390_push_dummy_call); | |
2360 | set_gdbarch_unwind_dummy_id (gdbarch, s390_unwind_dummy_id); | |
4074e13c | 2361 | set_gdbarch_frame_align (gdbarch, s390_frame_align); |
b0cf273e | 2362 | set_gdbarch_return_value (gdbarch, s390_return_value); |
5769d3cd | 2363 | |
a8c99f38 | 2364 | /* Frame handling. */ |
a431654a AC |
2365 | dwarf2_frame_set_init_reg (gdbarch, s390_dwarf2_frame_init_reg); |
2366 | frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); | |
2367 | frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer); | |
8e645ae7 | 2368 | frame_unwind_append_sniffer (gdbarch, s390_stub_frame_sniffer); |
a8c99f38 JB |
2369 | frame_unwind_append_sniffer (gdbarch, s390_sigtramp_frame_sniffer); |
2370 | frame_unwind_append_sniffer (gdbarch, s390_frame_sniffer); | |
2371 | frame_base_set_default (gdbarch, &s390_frame_base); | |
2372 | set_gdbarch_unwind_pc (gdbarch, s390_unwind_pc); | |
2373 | set_gdbarch_unwind_sp (gdbarch, s390_unwind_sp); | |
2374 | ||
5769d3cd AC |
2375 | switch (info.bfd_arch_info->mach) |
2376 | { | |
b8b8b047 | 2377 | case bfd_mach_s390_31: |
b0cf273e JB |
2378 | tdep->abi = ABI_LINUX_S390; |
2379 | ||
d0f54f9d JB |
2380 | tdep->gregset = &s390_gregset; |
2381 | tdep->sizeof_gregset = s390_sizeof_gregset; | |
2382 | tdep->fpregset = &s390_fpregset; | |
2383 | tdep->sizeof_fpregset = s390_sizeof_fpregset; | |
5769d3cd AC |
2384 | |
2385 | set_gdbarch_addr_bits_remove (gdbarch, s390_addr_bits_remove); | |
d0f54f9d JB |
2386 | set_gdbarch_pseudo_register_read (gdbarch, s390_pseudo_register_read); |
2387 | set_gdbarch_pseudo_register_write (gdbarch, s390_pseudo_register_write); | |
76a9d10f MK |
2388 | set_solib_svr4_fetch_link_map_offsets |
2389 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
9cbd5950 | 2390 | |
5769d3cd | 2391 | break; |
b8b8b047 | 2392 | case bfd_mach_s390_64: |
b0cf273e JB |
2393 | tdep->abi = ABI_LINUX_ZSERIES; |
2394 | ||
d0f54f9d JB |
2395 | tdep->gregset = &s390x_gregset; |
2396 | tdep->sizeof_gregset = s390x_sizeof_gregset; | |
2397 | tdep->fpregset = &s390_fpregset; | |
2398 | tdep->sizeof_fpregset = s390_sizeof_fpregset; | |
5769d3cd AC |
2399 | |
2400 | set_gdbarch_long_bit (gdbarch, 64); | |
2401 | set_gdbarch_long_long_bit (gdbarch, 64); | |
2402 | set_gdbarch_ptr_bit (gdbarch, 64); | |
d0f54f9d JB |
2403 | set_gdbarch_pseudo_register_read (gdbarch, s390x_pseudo_register_read); |
2404 | set_gdbarch_pseudo_register_write (gdbarch, s390x_pseudo_register_write); | |
76a9d10f MK |
2405 | set_solib_svr4_fetch_link_map_offsets |
2406 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
ffc65945 KB |
2407 | set_gdbarch_address_class_type_flags (gdbarch, |
2408 | s390_address_class_type_flags); | |
2409 | set_gdbarch_address_class_type_flags_to_name (gdbarch, | |
2410 | s390_address_class_type_flags_to_name); | |
2411 | set_gdbarch_address_class_name_to_type_flags (gdbarch, | |
2412 | s390_address_class_name_to_type_flags); | |
5769d3cd AC |
2413 | break; |
2414 | } | |
2415 | ||
36482093 AC |
2416 | set_gdbarch_print_insn (gdbarch, print_insn_s390); |
2417 | ||
982e9687 UW |
2418 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
2419 | ||
b2756930 KB |
2420 | /* Enable TLS support. */ |
2421 | set_gdbarch_fetch_tls_load_module_address (gdbarch, | |
2422 | svr4_fetch_objfile_link_map); | |
2423 | ||
5769d3cd AC |
2424 | return gdbarch; |
2425 | } | |
2426 | ||
2427 | ||
2428 | ||
a78f21af AC |
2429 | extern initialize_file_ftype _initialize_s390_tdep; /* -Wmissing-prototypes */ |
2430 | ||
5769d3cd | 2431 | void |
5ae5f592 | 2432 | _initialize_s390_tdep (void) |
5769d3cd AC |
2433 | { |
2434 | ||
2435 | /* Hook us into the gdbarch mechanism. */ | |
2436 | register_gdbarch_init (bfd_arch_s390, s390_gdbarch_init); | |
5769d3cd | 2437 | } |