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9abe5450 | 1 | /* PPC GNU/Linux native support. |
2555fe1a | 2 | |
e2882c85 | 3 | Copyright (C) 1988-2018 Free Software Foundation, Inc. |
c877c8e6 KB |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c877c8e6 KB |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c877c8e6 KB |
19 | |
20 | #include "defs.h" | |
76727919 | 21 | #include "observable.h" |
c877c8e6 KB |
22 | #include "frame.h" |
23 | #include "inferior.h" | |
6ffbb7ab | 24 | #include "gdbthread.h" |
c877c8e6 | 25 | #include "gdbcore.h" |
4e052eda | 26 | #include "regcache.h" |
1d75a658 | 27 | #include "regset.h" |
10d6c8cd DJ |
28 | #include "target.h" |
29 | #include "linux-nat.h" | |
c877c8e6 | 30 | #include <sys/types.h> |
c877c8e6 KB |
31 | #include <signal.h> |
32 | #include <sys/user.h> | |
33 | #include <sys/ioctl.h> | |
2555fe1a | 34 | #include "gdb_wait.h" |
c877c8e6 KB |
35 | #include <fcntl.h> |
36 | #include <sys/procfs.h> | |
5826e159 | 37 | #include "nat/gdb_ptrace.h" |
bcc0c096 | 38 | #include "inf-ptrace.h" |
c877c8e6 | 39 | |
0df8b418 | 40 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f | 41 | #include "gregset.h" |
16333c4f | 42 | #include "ppc-tdep.h" |
7284e1be UW |
43 | #include "ppc-linux-tdep.h" |
44 | ||
b7622095 LM |
45 | /* Required when using the AUXV. */ |
46 | #include "elf/common.h" | |
47 | #include "auxv.h" | |
48 | ||
bd64614e PFC |
49 | #include "arch/ppc-linux-common.h" |
50 | #include "arch/ppc-linux-tdesc.h" | |
514c5338 | 51 | #include "nat/ppc-linux.h" |
01904826 | 52 | |
6ffbb7ab | 53 | /* Similarly for the hardware watchpoint support. These requests are used |
926bf92d | 54 | when the PowerPC HWDEBUG ptrace interface is not available. */ |
e0d24f8d WZ |
55 | #ifndef PTRACE_GET_DEBUGREG |
56 | #define PTRACE_GET_DEBUGREG 25 | |
57 | #endif | |
58 | #ifndef PTRACE_SET_DEBUGREG | |
59 | #define PTRACE_SET_DEBUGREG 26 | |
60 | #endif | |
61 | #ifndef PTRACE_GETSIGINFO | |
62 | #define PTRACE_GETSIGINFO 0x4202 | |
63 | #endif | |
01904826 | 64 | |
926bf92d UW |
65 | /* These requests are used when the PowerPC HWDEBUG ptrace interface is |
66 | available. It exposes the debug facilities of PowerPC processors, as well | |
67 | as additional features of BookE processors, such as ranged breakpoints and | |
68 | watchpoints and hardware-accelerated condition evaluation. */ | |
6ffbb7ab TJB |
69 | #ifndef PPC_PTRACE_GETHWDBGINFO |
70 | ||
926bf92d UW |
71 | /* Not having PPC_PTRACE_GETHWDBGINFO defined means that the PowerPC HWDEBUG |
72 | ptrace interface is not present in ptrace.h, so we'll have to pretty much | |
73 | include it all here so that the code at least compiles on older systems. */ | |
6ffbb7ab TJB |
74 | #define PPC_PTRACE_GETHWDBGINFO 0x89 |
75 | #define PPC_PTRACE_SETHWDEBUG 0x88 | |
76 | #define PPC_PTRACE_DELHWDEBUG 0x87 | |
77 | ||
78 | struct ppc_debug_info | |
79 | { | |
0df8b418 | 80 | uint32_t version; /* Only version 1 exists to date. */ |
6ffbb7ab TJB |
81 | uint32_t num_instruction_bps; |
82 | uint32_t num_data_bps; | |
83 | uint32_t num_condition_regs; | |
84 | uint32_t data_bp_alignment; | |
0df8b418 | 85 | uint32_t sizeof_condition; /* size of the DVC register. */ |
6ffbb7ab TJB |
86 | uint64_t features; |
87 | }; | |
88 | ||
89 | /* Features will have bits indicating whether there is support for: */ | |
90 | #define PPC_DEBUG_FEATURE_INSN_BP_RANGE 0x1 | |
91 | #define PPC_DEBUG_FEATURE_INSN_BP_MASK 0x2 | |
92 | #define PPC_DEBUG_FEATURE_DATA_BP_RANGE 0x4 | |
93 | #define PPC_DEBUG_FEATURE_DATA_BP_MASK 0x8 | |
94 | ||
95 | struct ppc_hw_breakpoint | |
96 | { | |
97 | uint32_t version; /* currently, version must be 1 */ | |
98 | uint32_t trigger_type; /* only some combinations allowed */ | |
99 | uint32_t addr_mode; /* address match mode */ | |
100 | uint32_t condition_mode; /* break/watchpoint condition flags */ | |
101 | uint64_t addr; /* break/watchpoint address */ | |
102 | uint64_t addr2; /* range end or mask */ | |
103 | uint64_t condition_value; /* contents of the DVC register */ | |
104 | }; | |
105 | ||
106 | /* Trigger type. */ | |
107 | #define PPC_BREAKPOINT_TRIGGER_EXECUTE 0x1 | |
108 | #define PPC_BREAKPOINT_TRIGGER_READ 0x2 | |
109 | #define PPC_BREAKPOINT_TRIGGER_WRITE 0x4 | |
110 | #define PPC_BREAKPOINT_TRIGGER_RW 0x6 | |
111 | ||
112 | /* Address mode. */ | |
113 | #define PPC_BREAKPOINT_MODE_EXACT 0x0 | |
114 | #define PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE 0x1 | |
115 | #define PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE 0x2 | |
116 | #define PPC_BREAKPOINT_MODE_MASK 0x3 | |
117 | ||
118 | /* Condition mode. */ | |
119 | #define PPC_BREAKPOINT_CONDITION_NONE 0x0 | |
120 | #define PPC_BREAKPOINT_CONDITION_AND 0x1 | |
121 | #define PPC_BREAKPOINT_CONDITION_EXACT 0x1 | |
122 | #define PPC_BREAKPOINT_CONDITION_OR 0x2 | |
123 | #define PPC_BREAKPOINT_CONDITION_AND_OR 0x3 | |
124 | #define PPC_BREAKPOINT_CONDITION_BE_ALL 0x00ff0000 | |
125 | #define PPC_BREAKPOINT_CONDITION_BE_SHIFT 16 | |
126 | #define PPC_BREAKPOINT_CONDITION_BE(n) \ | |
127 | (1<<((n)+PPC_BREAKPOINT_CONDITION_BE_SHIFT)) | |
128 | #endif /* PPC_PTRACE_GETHWDBGINFO */ | |
129 | ||
e23b9d6e UW |
130 | /* Feature defined on Linux kernel v3.9: DAWR interface, that enables wider |
131 | watchpoint (up to 512 bytes). */ | |
132 | #ifndef PPC_DEBUG_FEATURE_DATA_BP_DAWR | |
133 | #define PPC_DEBUG_FEATURE_DATA_BP_DAWR 0x10 | |
134 | #endif /* PPC_DEBUG_FEATURE_DATA_BP_DAWR */ | |
6ffbb7ab | 135 | |
1dfe79e8 SDJ |
136 | /* Similarly for the general-purpose (gp0 -- gp31) |
137 | and floating-point registers (fp0 -- fp31). */ | |
138 | #ifndef PTRACE_GETREGS | |
139 | #define PTRACE_GETREGS 12 | |
140 | #endif | |
141 | #ifndef PTRACE_SETREGS | |
142 | #define PTRACE_SETREGS 13 | |
143 | #endif | |
144 | #ifndef PTRACE_GETFPREGS | |
145 | #define PTRACE_GETFPREGS 14 | |
146 | #endif | |
147 | #ifndef PTRACE_SETFPREGS | |
148 | #define PTRACE_SETFPREGS 15 | |
149 | #endif | |
150 | ||
9abe5450 EZ |
151 | /* This oddity is because the Linux kernel defines elf_vrregset_t as |
152 | an array of 33 16 bytes long elements. I.e. it leaves out vrsave. | |
153 | However the PTRACE_GETVRREGS and PTRACE_SETVRREGS requests return | |
154 | the vrsave as an extra 4 bytes at the end. I opted for creating a | |
155 | flat array of chars, so that it is easier to manipulate for gdb. | |
156 | ||
157 | There are 32 vector registers 16 bytes longs, plus a VSCR register | |
158 | which is only 4 bytes long, but is fetched as a 16 bytes | |
0df8b418 | 159 | quantity. Up to here we have the elf_vrregset_t structure. |
9abe5450 EZ |
160 | Appended to this there is space for the VRSAVE register: 4 bytes. |
161 | Even though this vrsave register is not included in the regset | |
162 | typedef, it is handled by the ptrace requests. | |
163 | ||
9abe5450 EZ |
164 | The layout is like this (where x is the actual value of the vscr reg): */ |
165 | ||
166 | /* *INDENT-OFF* */ | |
167 | /* | |
1d75a658 | 168 | Big-Endian: |
9abe5450 EZ |
169 | |.|.|.|.|.....|.|.|.|.||.|.|.|x||.| |
170 | <-------> <-------><-------><-> | |
171 | VR0 VR31 VSCR VRSAVE | |
1d75a658 PFC |
172 | Little-Endian: |
173 | |.|.|.|.|.....|.|.|.|.||X|.|.|.||.| | |
174 | <-------> <-------><-------><-> | |
175 | VR0 VR31 VSCR VRSAVE | |
9abe5450 EZ |
176 | */ |
177 | /* *INDENT-ON* */ | |
178 | ||
d078308a | 179 | typedef char gdb_vrregset_t[PPC_LINUX_SIZEOF_VRREGSET]; |
9abe5450 | 180 | |
604c2f83 LM |
181 | /* This is the layout of the POWER7 VSX registers and the way they overlap |
182 | with the existing FPR and VMX registers. | |
183 | ||
184 | VSR doubleword 0 VSR doubleword 1 | |
185 | ---------------------------------------------------------------- | |
186 | VSR[0] | FPR[0] | | | |
187 | ---------------------------------------------------------------- | |
188 | VSR[1] | FPR[1] | | | |
189 | ---------------------------------------------------------------- | |
190 | | ... | | | |
191 | | ... | | | |
192 | ---------------------------------------------------------------- | |
193 | VSR[30] | FPR[30] | | | |
194 | ---------------------------------------------------------------- | |
195 | VSR[31] | FPR[31] | | | |
196 | ---------------------------------------------------------------- | |
197 | VSR[32] | VR[0] | | |
198 | ---------------------------------------------------------------- | |
199 | VSR[33] | VR[1] | | |
200 | ---------------------------------------------------------------- | |
201 | | ... | | |
202 | | ... | | |
203 | ---------------------------------------------------------------- | |
204 | VSR[62] | VR[30] | | |
205 | ---------------------------------------------------------------- | |
206 | VSR[63] | VR[31] | | |
207 | ---------------------------------------------------------------- | |
208 | ||
209 | VSX has 64 128bit registers. The first 32 registers overlap with | |
210 | the FP registers (doubleword 0) and hence extend them with additional | |
211 | 64 bits (doubleword 1). The other 32 regs overlap with the VMX | |
212 | registers. */ | |
d078308a | 213 | typedef char gdb_vsxregset_t[PPC_LINUX_SIZEOF_VSXREGSET]; |
01904826 | 214 | |
b021a221 | 215 | /* On PPC processors that support the Signal Processing Extension |
01904826 | 216 | (SPE) APU, the general-purpose registers are 64 bits long. |
411cb3f9 PG |
217 | However, the ordinary Linux kernel PTRACE_PEEKUSER / PTRACE_POKEUSER |
218 | ptrace calls only access the lower half of each register, to allow | |
219 | them to behave the same way they do on non-SPE systems. There's a | |
220 | separate pair of calls, PTRACE_GETEVRREGS / PTRACE_SETEVRREGS, that | |
221 | read and write the top halves of all the general-purpose registers | |
222 | at once, along with some SPE-specific registers. | |
01904826 JB |
223 | |
224 | GDB itself continues to claim the general-purpose registers are 32 | |
6ced10dd | 225 | bits long. It has unnamed raw registers that hold the upper halves |
b021a221 | 226 | of the gprs, and the full 64-bit SIMD views of the registers, |
6ced10dd JB |
227 | 'ev0' -- 'ev31', are pseudo-registers that splice the top and |
228 | bottom halves together. | |
01904826 JB |
229 | |
230 | This is the structure filled in by PTRACE_GETEVRREGS and written to | |
231 | the inferior's registers by PTRACE_SETEVRREGS. */ | |
232 | struct gdb_evrregset_t | |
233 | { | |
234 | unsigned long evr[32]; | |
235 | unsigned long long acc; | |
236 | unsigned long spefscr; | |
237 | }; | |
238 | ||
604c2f83 LM |
239 | /* Non-zero if our kernel may support the PTRACE_GETVSXREGS and |
240 | PTRACE_SETVSXREGS requests, for reading and writing the VSX | |
241 | POWER7 registers 0 through 31. Zero if we've tried one of them and | |
242 | gotten an error. Note that VSX registers 32 through 63 overlap | |
243 | with VR registers 0 through 31. */ | |
244 | int have_ptrace_getsetvsxregs = 1; | |
01904826 JB |
245 | |
246 | /* Non-zero if our kernel may support the PTRACE_GETVRREGS and | |
247 | PTRACE_SETVRREGS requests, for reading and writing the Altivec | |
248 | registers. Zero if we've tried one of them and gotten an | |
249 | error. */ | |
9abe5450 EZ |
250 | int have_ptrace_getvrregs = 1; |
251 | ||
01904826 JB |
252 | /* Non-zero if our kernel may support the PTRACE_GETEVRREGS and |
253 | PTRACE_SETEVRREGS requests, for reading and writing the SPE | |
254 | registers. Zero if we've tried one of them and gotten an | |
255 | error. */ | |
256 | int have_ptrace_getsetevrregs = 1; | |
257 | ||
1dfe79e8 SDJ |
258 | /* Non-zero if our kernel may support the PTRACE_GETREGS and |
259 | PTRACE_SETREGS requests, for reading and writing the | |
260 | general-purpose registers. Zero if we've tried one of | |
261 | them and gotten an error. */ | |
262 | int have_ptrace_getsetregs = 1; | |
263 | ||
264 | /* Non-zero if our kernel may support the PTRACE_GETFPREGS and | |
265 | PTRACE_SETFPREGS requests, for reading and writing the | |
266 | floating-pointers registers. Zero if we've tried one of | |
267 | them and gotten an error. */ | |
268 | int have_ptrace_getsetfpregs = 1; | |
269 | ||
f6ac5f3d PA |
270 | struct ppc_linux_nat_target final : public linux_nat_target |
271 | { | |
272 | /* Add our register access methods. */ | |
273 | void fetch_registers (struct regcache *, int) override; | |
274 | void store_registers (struct regcache *, int) override; | |
275 | ||
276 | /* Add our breakpoint/watchpoint methods. */ | |
277 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
278 | ||
279 | int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
280 | override; | |
281 | ||
282 | int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) | |
283 | override; | |
284 | ||
285 | int region_ok_for_hw_watchpoint (CORE_ADDR, int) override; | |
286 | ||
287 | int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
288 | struct expression *) override; | |
289 | ||
290 | int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type, | |
291 | struct expression *) override; | |
292 | ||
293 | int insert_mask_watchpoint (CORE_ADDR, CORE_ADDR, enum target_hw_bp_type) | |
294 | override; | |
295 | ||
296 | int remove_mask_watchpoint (CORE_ADDR, CORE_ADDR, enum target_hw_bp_type) | |
297 | override; | |
298 | ||
57810aa7 | 299 | bool stopped_by_watchpoint () override; |
f6ac5f3d | 300 | |
57810aa7 | 301 | bool stopped_data_address (CORE_ADDR *) override; |
f6ac5f3d | 302 | |
57810aa7 | 303 | bool watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override; |
f6ac5f3d | 304 | |
57810aa7 | 305 | bool can_accel_watchpoint_condition (CORE_ADDR, int, int, struct expression *) |
f6ac5f3d PA |
306 | override; |
307 | ||
308 | int masked_watch_num_registers (CORE_ADDR, CORE_ADDR) override; | |
309 | ||
310 | int ranged_break_num_registers () override; | |
311 | ||
312 | const struct target_desc *read_description () override; | |
313 | ||
314 | int auxv_parse (gdb_byte **readptr, | |
315 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
316 | override; | |
135340af PA |
317 | |
318 | /* Override linux_nat_target low methods. */ | |
319 | void low_new_thread (struct lwp_info *lp) override; | |
f6ac5f3d PA |
320 | }; |
321 | ||
322 | static ppc_linux_nat_target the_ppc_linux_nat_target; | |
323 | ||
16333c4f EZ |
324 | /* *INDENT-OFF* */ |
325 | /* registers layout, as presented by the ptrace interface: | |
326 | PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, | |
327 | PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15, | |
328 | PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23, | |
329 | PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31, | |
0df8b418 MS |
330 | PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, |
331 | PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14, | |
332 | PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, | |
333 | PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30, | |
334 | PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, | |
335 | PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46, | |
336 | PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, | |
337 | PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62, | |
16333c4f EZ |
338 | PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */ |
339 | /* *INDENT_ON * */ | |
c877c8e6 | 340 | |
45229ea4 | 341 | static int |
e101270f | 342 | ppc_register_u_addr (struct gdbarch *gdbarch, int regno) |
c877c8e6 | 343 | { |
16333c4f | 344 | int u_addr = -1; |
e101270f | 345 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
56d0d96a AC |
346 | /* NOTE: cagney/2003-11-25: This is the word size used by the ptrace |
347 | interface, and not the wordsize of the program's ABI. */ | |
411cb3f9 | 348 | int wordsize = sizeof (long); |
16333c4f | 349 | |
0df8b418 | 350 | /* General purpose registers occupy 1 slot each in the buffer. */ |
8bf659e8 JB |
351 | if (regno >= tdep->ppc_gp0_regnum |
352 | && regno < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
26e75e5c | 353 | u_addr = ((regno - tdep->ppc_gp0_regnum + PT_R0) * wordsize); |
16333c4f | 354 | |
49ff75ad JB |
355 | /* Floating point regs: eight bytes each in both 32- and 64-bit |
356 | ptrace interfaces. Thus, two slots each in 32-bit interface, one | |
357 | slot each in 64-bit interface. */ | |
383f0f5b JB |
358 | if (tdep->ppc_fp0_regnum >= 0 |
359 | && regno >= tdep->ppc_fp0_regnum | |
366f009f JB |
360 | && regno < tdep->ppc_fp0_regnum + ppc_num_fprs) |
361 | u_addr = (PT_FPR0 * wordsize) + ((regno - tdep->ppc_fp0_regnum) * 8); | |
16333c4f | 362 | |
0df8b418 | 363 | /* UISA special purpose registers: 1 slot each. */ |
e101270f | 364 | if (regno == gdbarch_pc_regnum (gdbarch)) |
49ff75ad | 365 | u_addr = PT_NIP * wordsize; |
dc5cfeb6 | 366 | if (regno == tdep->ppc_lr_regnum) |
49ff75ad | 367 | u_addr = PT_LNK * wordsize; |
dc5cfeb6 | 368 | if (regno == tdep->ppc_cr_regnum) |
49ff75ad | 369 | u_addr = PT_CCR * wordsize; |
dc5cfeb6 | 370 | if (regno == tdep->ppc_xer_regnum) |
49ff75ad | 371 | u_addr = PT_XER * wordsize; |
dc5cfeb6 | 372 | if (regno == tdep->ppc_ctr_regnum) |
49ff75ad | 373 | u_addr = PT_CTR * wordsize; |
f8c59253 | 374 | #ifdef PT_MQ |
dc5cfeb6 | 375 | if (regno == tdep->ppc_mq_regnum) |
49ff75ad | 376 | u_addr = PT_MQ * wordsize; |
f8c59253 | 377 | #endif |
dc5cfeb6 | 378 | if (regno == tdep->ppc_ps_regnum) |
49ff75ad | 379 | u_addr = PT_MSR * wordsize; |
7284e1be UW |
380 | if (regno == PPC_ORIG_R3_REGNUM) |
381 | u_addr = PT_ORIG_R3 * wordsize; | |
382 | if (regno == PPC_TRAP_REGNUM) | |
383 | u_addr = PT_TRAP * wordsize; | |
383f0f5b JB |
384 | if (tdep->ppc_fpscr_regnum >= 0 |
385 | && regno == tdep->ppc_fpscr_regnum) | |
8f135812 AC |
386 | { |
387 | /* NOTE: cagney/2005-02-08: On some 64-bit GNU/Linux systems the | |
388 | kernel headers incorrectly contained the 32-bit definition of | |
389 | PT_FPSCR. For the 32-bit definition, floating-point | |
390 | registers occupy two 32-bit "slots", and the FPSCR lives in | |
69abc51c | 391 | the second half of such a slot-pair (hence +1). For 64-bit, |
8f135812 AC |
392 | the FPSCR instead occupies the full 64-bit 2-word-slot and |
393 | hence no adjustment is necessary. Hack around this. */ | |
394 | if (wordsize == 8 && PT_FPSCR == (48 + 32 + 1)) | |
395 | u_addr = (48 + 32) * wordsize; | |
69abc51c TJB |
396 | /* If the FPSCR is 64-bit wide, we need to fetch the whole 64-bit |
397 | slot and not just its second word. The PT_FPSCR supplied when | |
398 | GDB is compiled as a 32-bit app doesn't reflect this. */ | |
399 | else if (wordsize == 4 && register_size (gdbarch, regno) == 8 | |
400 | && PT_FPSCR == (48 + 2*32 + 1)) | |
401 | u_addr = (48 + 2*32) * wordsize; | |
8f135812 AC |
402 | else |
403 | u_addr = PT_FPSCR * wordsize; | |
404 | } | |
16333c4f | 405 | return u_addr; |
c877c8e6 KB |
406 | } |
407 | ||
604c2f83 LM |
408 | /* The Linux kernel ptrace interface for POWER7 VSX registers uses the |
409 | registers set mechanism, as opposed to the interface for all the | |
410 | other registers, that stores/fetches each register individually. */ | |
411 | static void | |
2c3305f6 | 412 | fetch_vsx_registers (struct regcache *regcache, int tid, int regno) |
604c2f83 LM |
413 | { |
414 | int ret; | |
415 | gdb_vsxregset_t regs; | |
2c3305f6 | 416 | const struct regset *vsxregset = ppc_linux_vsxregset (); |
604c2f83 LM |
417 | |
418 | ret = ptrace (PTRACE_GETVSXREGS, tid, 0, ®s); | |
419 | if (ret < 0) | |
420 | { | |
421 | if (errno == EIO) | |
422 | { | |
423 | have_ptrace_getsetvsxregs = 0; | |
424 | return; | |
425 | } | |
2c3305f6 | 426 | perror_with_name (_("Unable to fetch VSX registers")); |
604c2f83 LM |
427 | } |
428 | ||
2c3305f6 PFC |
429 | vsxregset->supply_regset (vsxregset, regcache, regno, ®s, |
430 | PPC_LINUX_SIZEOF_VSXREGSET); | |
604c2f83 LM |
431 | } |
432 | ||
9abe5450 EZ |
433 | /* The Linux kernel ptrace interface for AltiVec registers uses the |
434 | registers set mechanism, as opposed to the interface for all the | |
435 | other registers, that stores/fetches each register individually. */ | |
436 | static void | |
1d75a658 PFC |
437 | fetch_altivec_registers (struct regcache *regcache, int tid, |
438 | int regno) | |
9abe5450 EZ |
439 | { |
440 | int ret; | |
9abe5450 | 441 | gdb_vrregset_t regs; |
ac7936df | 442 | struct gdbarch *gdbarch = regcache->arch (); |
1d75a658 | 443 | const struct regset *vrregset = ppc_linux_vrregset (gdbarch); |
9abe5450 EZ |
444 | |
445 | ret = ptrace (PTRACE_GETVRREGS, tid, 0, ®s); | |
446 | if (ret < 0) | |
447 | { | |
448 | if (errno == EIO) | |
449 | { | |
450 | have_ptrace_getvrregs = 0; | |
451 | return; | |
452 | } | |
1d75a658 | 453 | perror_with_name (_("Unable to fetch AltiVec registers")); |
9abe5450 | 454 | } |
1d75a658 PFC |
455 | |
456 | vrregset->supply_regset (vrregset, regcache, regno, ®s, | |
457 | PPC_LINUX_SIZEOF_VRREGSET); | |
9abe5450 EZ |
458 | } |
459 | ||
01904826 JB |
460 | /* Fetch the top 32 bits of TID's general-purpose registers and the |
461 | SPE-specific registers, and place the results in EVRREGSET. If we | |
462 | don't support PTRACE_GETEVRREGS, then just fill EVRREGSET with | |
463 | zeros. | |
464 | ||
465 | All the logic to deal with whether or not the PTRACE_GETEVRREGS and | |
466 | PTRACE_SETEVRREGS requests are supported is isolated here, and in | |
467 | set_spe_registers. */ | |
468 | static void | |
469 | get_spe_registers (int tid, struct gdb_evrregset_t *evrregset) | |
470 | { | |
471 | if (have_ptrace_getsetevrregs) | |
472 | { | |
473 | if (ptrace (PTRACE_GETEVRREGS, tid, 0, evrregset) >= 0) | |
474 | return; | |
475 | else | |
476 | { | |
477 | /* EIO means that the PTRACE_GETEVRREGS request isn't supported; | |
478 | we just return zeros. */ | |
479 | if (errno == EIO) | |
480 | have_ptrace_getsetevrregs = 0; | |
481 | else | |
482 | /* Anything else needs to be reported. */ | |
e2e0b3e5 | 483 | perror_with_name (_("Unable to fetch SPE registers")); |
01904826 JB |
484 | } |
485 | } | |
486 | ||
487 | memset (evrregset, 0, sizeof (*evrregset)); | |
488 | } | |
489 | ||
6ced10dd JB |
490 | /* Supply values from TID for SPE-specific raw registers: the upper |
491 | halves of the GPRs, the accumulator, and the spefscr. REGNO must | |
492 | be the number of an upper half register, acc, spefscr, or -1 to | |
493 | supply the values of all registers. */ | |
01904826 | 494 | static void |
56be3814 | 495 | fetch_spe_register (struct regcache *regcache, int tid, int regno) |
01904826 | 496 | { |
ac7936df | 497 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 498 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
01904826 JB |
499 | struct gdb_evrregset_t evrregs; |
500 | ||
6ced10dd | 501 | gdb_assert (sizeof (evrregs.evr[0]) |
40a6adc1 | 502 | == register_size (gdbarch, tdep->ppc_ev0_upper_regnum)); |
6ced10dd | 503 | gdb_assert (sizeof (evrregs.acc) |
40a6adc1 | 504 | == register_size (gdbarch, tdep->ppc_acc_regnum)); |
6ced10dd | 505 | gdb_assert (sizeof (evrregs.spefscr) |
40a6adc1 | 506 | == register_size (gdbarch, tdep->ppc_spefscr_regnum)); |
6ced10dd | 507 | |
01904826 JB |
508 | get_spe_registers (tid, &evrregs); |
509 | ||
6ced10dd | 510 | if (regno == -1) |
01904826 | 511 | { |
6ced10dd JB |
512 | int i; |
513 | ||
514 | for (i = 0; i < ppc_num_gprs; i++) | |
56be3814 | 515 | regcache_raw_supply (regcache, tdep->ppc_ev0_upper_regnum + i, |
6ced10dd | 516 | &evrregs.evr[i]); |
01904826 | 517 | } |
6ced10dd JB |
518 | else if (tdep->ppc_ev0_upper_regnum <= regno |
519 | && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs) | |
56be3814 | 520 | regcache_raw_supply (regcache, regno, |
6ced10dd JB |
521 | &evrregs.evr[regno - tdep->ppc_ev0_upper_regnum]); |
522 | ||
523 | if (regno == -1 | |
524 | || regno == tdep->ppc_acc_regnum) | |
56be3814 | 525 | regcache_raw_supply (regcache, tdep->ppc_acc_regnum, &evrregs.acc); |
6ced10dd JB |
526 | |
527 | if (regno == -1 | |
528 | || regno == tdep->ppc_spefscr_regnum) | |
56be3814 | 529 | regcache_raw_supply (regcache, tdep->ppc_spefscr_regnum, |
6ced10dd | 530 | &evrregs.spefscr); |
01904826 JB |
531 | } |
532 | ||
45229ea4 | 533 | static void |
56be3814 | 534 | fetch_register (struct regcache *regcache, int tid, int regno) |
45229ea4 | 535 | { |
ac7936df | 536 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 537 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
45229ea4 | 538 | /* This isn't really an address. But ptrace thinks of it as one. */ |
e101270f | 539 | CORE_ADDR regaddr = ppc_register_u_addr (gdbarch, regno); |
4a19ea35 | 540 | int bytes_transferred; |
0df8b418 | 541 | unsigned int offset; /* Offset of registers within the u area. */ |
0f068fb5 | 542 | gdb_byte buf[PPC_MAX_REGISTER_SIZE]; |
45229ea4 | 543 | |
be8626e0 | 544 | if (altivec_register_p (gdbarch, regno)) |
9abe5450 EZ |
545 | { |
546 | /* If this is the first time through, or if it is not the first | |
547 | time through, and we have comfirmed that there is kernel | |
548 | support for such a ptrace request, then go and fetch the | |
549 | register. */ | |
550 | if (have_ptrace_getvrregs) | |
551 | { | |
1d75a658 | 552 | fetch_altivec_registers (regcache, tid, regno); |
9abe5450 EZ |
553 | return; |
554 | } | |
555 | /* If we have discovered that there is no ptrace support for | |
556 | AltiVec registers, fall through and return zeroes, because | |
557 | regaddr will be -1 in this case. */ | |
558 | } | |
604c2f83 LM |
559 | if (vsx_register_p (gdbarch, regno)) |
560 | { | |
561 | if (have_ptrace_getsetvsxregs) | |
562 | { | |
2c3305f6 | 563 | fetch_vsx_registers (regcache, tid, regno); |
604c2f83 LM |
564 | return; |
565 | } | |
566 | } | |
be8626e0 | 567 | else if (spe_register_p (gdbarch, regno)) |
01904826 | 568 | { |
56be3814 | 569 | fetch_spe_register (regcache, tid, regno); |
01904826 JB |
570 | return; |
571 | } | |
9abe5450 | 572 | |
45229ea4 EZ |
573 | if (regaddr == -1) |
574 | { | |
40a6adc1 | 575 | memset (buf, '\0', register_size (gdbarch, regno)); /* Supply zeroes */ |
56be3814 | 576 | regcache_raw_supply (regcache, regno, buf); |
45229ea4 EZ |
577 | return; |
578 | } | |
579 | ||
411cb3f9 | 580 | /* Read the raw register using sizeof(long) sized chunks. On a |
56d0d96a AC |
581 | 32-bit platform, 64-bit floating-point registers will require two |
582 | transfers. */ | |
4a19ea35 | 583 | for (bytes_transferred = 0; |
40a6adc1 | 584 | bytes_transferred < register_size (gdbarch, regno); |
411cb3f9 | 585 | bytes_transferred += sizeof (long)) |
45229ea4 | 586 | { |
11fde611 JK |
587 | long l; |
588 | ||
45229ea4 | 589 | errno = 0; |
11fde611 | 590 | l = ptrace (PTRACE_PEEKUSER, tid, (PTRACE_TYPE_ARG3) regaddr, 0); |
411cb3f9 | 591 | regaddr += sizeof (long); |
45229ea4 EZ |
592 | if (errno != 0) |
593 | { | |
bc97b3ba | 594 | char message[128]; |
8c042590 PM |
595 | xsnprintf (message, sizeof (message), "reading register %s (#%d)", |
596 | gdbarch_register_name (gdbarch, regno), regno); | |
bc97b3ba | 597 | perror_with_name (message); |
45229ea4 | 598 | } |
11fde611 | 599 | memcpy (&buf[bytes_transferred], &l, sizeof (l)); |
45229ea4 | 600 | } |
56d0d96a | 601 | |
4a19ea35 JB |
602 | /* Now supply the register. Keep in mind that the regcache's idea |
603 | of the register's size may not be a multiple of sizeof | |
411cb3f9 | 604 | (long). */ |
40a6adc1 | 605 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
4a19ea35 JB |
606 | { |
607 | /* Little-endian values are always found at the left end of the | |
608 | bytes transferred. */ | |
56be3814 | 609 | regcache_raw_supply (regcache, regno, buf); |
4a19ea35 | 610 | } |
40a6adc1 | 611 | else if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
4a19ea35 JB |
612 | { |
613 | /* Big-endian values are found at the right end of the bytes | |
614 | transferred. */ | |
40a6adc1 | 615 | size_t padding = (bytes_transferred - register_size (gdbarch, regno)); |
56be3814 | 616 | regcache_raw_supply (regcache, regno, buf + padding); |
4a19ea35 JB |
617 | } |
618 | else | |
a44bddec | 619 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 620 | _("fetch_register: unexpected byte order: %d"), |
40a6adc1 | 621 | gdbarch_byte_order (gdbarch)); |
45229ea4 EZ |
622 | } |
623 | ||
1dfe79e8 SDJ |
624 | /* This function actually issues the request to ptrace, telling |
625 | it to get all general-purpose registers and put them into the | |
626 | specified regset. | |
627 | ||
628 | If the ptrace request does not exist, this function returns 0 | |
629 | and properly sets the have_ptrace_* flag. If the request fails, | |
630 | this function calls perror_with_name. Otherwise, if the request | |
631 | succeeds, then the regcache gets filled and 1 is returned. */ | |
632 | static int | |
633 | fetch_all_gp_regs (struct regcache *regcache, int tid) | |
634 | { | |
ac7936df | 635 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
636 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
637 | gdb_gregset_t gregset; | |
638 | ||
639 | if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0) | |
640 | { | |
641 | if (errno == EIO) | |
642 | { | |
643 | have_ptrace_getsetregs = 0; | |
644 | return 0; | |
645 | } | |
646 | perror_with_name (_("Couldn't get general-purpose registers.")); | |
647 | } | |
648 | ||
649 | supply_gregset (regcache, (const gdb_gregset_t *) &gregset); | |
650 | ||
651 | return 1; | |
652 | } | |
653 | ||
654 | /* This is a wrapper for the fetch_all_gp_regs function. It is | |
655 | responsible for verifying if this target has the ptrace request | |
656 | that can be used to fetch all general-purpose registers at one | |
657 | shot. If it doesn't, then we should fetch them using the | |
658 | old-fashioned way, which is to iterate over the registers and | |
659 | request them one by one. */ | |
660 | static void | |
661 | fetch_gp_regs (struct regcache *regcache, int tid) | |
662 | { | |
ac7936df | 663 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
664 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
665 | int i; | |
666 | ||
667 | if (have_ptrace_getsetregs) | |
668 | if (fetch_all_gp_regs (regcache, tid)) | |
669 | return; | |
670 | ||
671 | /* If we've hit this point, it doesn't really matter which | |
672 | architecture we are using. We just need to read the | |
673 | registers in the "old-fashioned way". */ | |
674 | for (i = 0; i < ppc_num_gprs; i++) | |
675 | fetch_register (regcache, tid, tdep->ppc_gp0_regnum + i); | |
676 | } | |
677 | ||
678 | /* This function actually issues the request to ptrace, telling | |
679 | it to get all floating-point registers and put them into the | |
680 | specified regset. | |
681 | ||
682 | If the ptrace request does not exist, this function returns 0 | |
683 | and properly sets the have_ptrace_* flag. If the request fails, | |
684 | this function calls perror_with_name. Otherwise, if the request | |
685 | succeeds, then the regcache gets filled and 1 is returned. */ | |
686 | static int | |
687 | fetch_all_fp_regs (struct regcache *regcache, int tid) | |
688 | { | |
689 | gdb_fpregset_t fpregs; | |
690 | ||
691 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (void *) &fpregs) < 0) | |
692 | { | |
693 | if (errno == EIO) | |
694 | { | |
695 | have_ptrace_getsetfpregs = 0; | |
696 | return 0; | |
697 | } | |
698 | perror_with_name (_("Couldn't get floating-point registers.")); | |
699 | } | |
700 | ||
701 | supply_fpregset (regcache, (const gdb_fpregset_t *) &fpregs); | |
702 | ||
703 | return 1; | |
704 | } | |
705 | ||
706 | /* This is a wrapper for the fetch_all_fp_regs function. It is | |
707 | responsible for verifying if this target has the ptrace request | |
708 | that can be used to fetch all floating-point registers at one | |
709 | shot. If it doesn't, then we should fetch them using the | |
710 | old-fashioned way, which is to iterate over the registers and | |
711 | request them one by one. */ | |
712 | static void | |
713 | fetch_fp_regs (struct regcache *regcache, int tid) | |
714 | { | |
ac7936df | 715 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
716 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
717 | int i; | |
718 | ||
719 | if (have_ptrace_getsetfpregs) | |
720 | if (fetch_all_fp_regs (regcache, tid)) | |
721 | return; | |
722 | ||
723 | /* If we've hit this point, it doesn't really matter which | |
724 | architecture we are using. We just need to read the | |
725 | registers in the "old-fashioned way". */ | |
726 | for (i = 0; i < ppc_num_fprs; i++) | |
727 | fetch_register (regcache, tid, tdep->ppc_fp0_regnum + i); | |
728 | } | |
729 | ||
45229ea4 | 730 | static void |
56be3814 | 731 | fetch_ppc_registers (struct regcache *regcache, int tid) |
45229ea4 EZ |
732 | { |
733 | int i; | |
ac7936df | 734 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 735 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
9abe5450 | 736 | |
1dfe79e8 | 737 | fetch_gp_regs (regcache, tid); |
32b99774 | 738 | if (tdep->ppc_fp0_regnum >= 0) |
1dfe79e8 | 739 | fetch_fp_regs (regcache, tid); |
40a6adc1 | 740 | fetch_register (regcache, tid, gdbarch_pc_regnum (gdbarch)); |
32b99774 | 741 | if (tdep->ppc_ps_regnum != -1) |
56be3814 | 742 | fetch_register (regcache, tid, tdep->ppc_ps_regnum); |
32b99774 | 743 | if (tdep->ppc_cr_regnum != -1) |
56be3814 | 744 | fetch_register (regcache, tid, tdep->ppc_cr_regnum); |
32b99774 | 745 | if (tdep->ppc_lr_regnum != -1) |
56be3814 | 746 | fetch_register (regcache, tid, tdep->ppc_lr_regnum); |
32b99774 | 747 | if (tdep->ppc_ctr_regnum != -1) |
56be3814 | 748 | fetch_register (regcache, tid, tdep->ppc_ctr_regnum); |
32b99774 | 749 | if (tdep->ppc_xer_regnum != -1) |
56be3814 | 750 | fetch_register (regcache, tid, tdep->ppc_xer_regnum); |
e3f36dbd | 751 | if (tdep->ppc_mq_regnum != -1) |
56be3814 | 752 | fetch_register (regcache, tid, tdep->ppc_mq_regnum); |
7284e1be UW |
753 | if (ppc_linux_trap_reg_p (gdbarch)) |
754 | { | |
755 | fetch_register (regcache, tid, PPC_ORIG_R3_REGNUM); | |
756 | fetch_register (regcache, tid, PPC_TRAP_REGNUM); | |
757 | } | |
32b99774 | 758 | if (tdep->ppc_fpscr_regnum != -1) |
56be3814 | 759 | fetch_register (regcache, tid, tdep->ppc_fpscr_regnum); |
9abe5450 EZ |
760 | if (have_ptrace_getvrregs) |
761 | if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) | |
1d75a658 | 762 | fetch_altivec_registers (regcache, tid, -1); |
604c2f83 LM |
763 | if (have_ptrace_getsetvsxregs) |
764 | if (tdep->ppc_vsr0_upper_regnum != -1) | |
2c3305f6 | 765 | fetch_vsx_registers (regcache, tid, -1); |
6ced10dd | 766 | if (tdep->ppc_ev0_upper_regnum >= 0) |
56be3814 | 767 | fetch_spe_register (regcache, tid, -1); |
45229ea4 EZ |
768 | } |
769 | ||
770 | /* Fetch registers from the child process. Fetch all registers if | |
771 | regno == -1, otherwise fetch all general registers or all floating | |
772 | point registers depending upon the value of regno. */ | |
f6ac5f3d PA |
773 | void |
774 | ppc_linux_nat_target::fetch_registers (struct regcache *regcache, int regno) | |
45229ea4 | 775 | { |
bcc0c096 | 776 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
05f13b9c | 777 | |
9abe5450 | 778 | if (regno == -1) |
56be3814 | 779 | fetch_ppc_registers (regcache, tid); |
45229ea4 | 780 | else |
56be3814 | 781 | fetch_register (regcache, tid, regno); |
45229ea4 EZ |
782 | } |
783 | ||
604c2f83 | 784 | static void |
2c3305f6 | 785 | store_vsx_registers (const struct regcache *regcache, int tid, int regno) |
604c2f83 LM |
786 | { |
787 | int ret; | |
788 | gdb_vsxregset_t regs; | |
2c3305f6 | 789 | const struct regset *vsxregset = ppc_linux_vsxregset (); |
604c2f83 | 790 | |
9fe70b4f | 791 | ret = ptrace (PTRACE_GETVSXREGS, tid, 0, ®s); |
604c2f83 LM |
792 | if (ret < 0) |
793 | { | |
794 | if (errno == EIO) | |
795 | { | |
796 | have_ptrace_getsetvsxregs = 0; | |
797 | return; | |
798 | } | |
2c3305f6 | 799 | perror_with_name (_("Unable to fetch VSX registers")); |
604c2f83 LM |
800 | } |
801 | ||
2c3305f6 PFC |
802 | vsxregset->collect_regset (vsxregset, regcache, regno, ®s, |
803 | PPC_LINUX_SIZEOF_VSXREGSET); | |
604c2f83 LM |
804 | |
805 | ret = ptrace (PTRACE_SETVSXREGS, tid, 0, ®s); | |
806 | if (ret < 0) | |
2c3305f6 | 807 | perror_with_name (_("Unable to store VSX registers")); |
604c2f83 LM |
808 | } |
809 | ||
9abe5450 | 810 | static void |
1d75a658 PFC |
811 | store_altivec_registers (const struct regcache *regcache, int tid, |
812 | int regno) | |
9abe5450 EZ |
813 | { |
814 | int ret; | |
9abe5450 | 815 | gdb_vrregset_t regs; |
ac7936df | 816 | struct gdbarch *gdbarch = regcache->arch (); |
1d75a658 | 817 | const struct regset *vrregset = ppc_linux_vrregset (gdbarch); |
9abe5450 EZ |
818 | |
819 | ret = ptrace (PTRACE_GETVRREGS, tid, 0, ®s); | |
820 | if (ret < 0) | |
821 | { | |
822 | if (errno == EIO) | |
823 | { | |
824 | have_ptrace_getvrregs = 0; | |
825 | return; | |
826 | } | |
1d75a658 | 827 | perror_with_name (_("Unable to fetch AltiVec registers")); |
9abe5450 EZ |
828 | } |
829 | ||
1d75a658 PFC |
830 | vrregset->collect_regset (vrregset, regcache, regno, ®s, |
831 | PPC_LINUX_SIZEOF_VRREGSET); | |
9abe5450 EZ |
832 | |
833 | ret = ptrace (PTRACE_SETVRREGS, tid, 0, ®s); | |
834 | if (ret < 0) | |
1d75a658 | 835 | perror_with_name (_("Unable to store AltiVec registers")); |
9abe5450 EZ |
836 | } |
837 | ||
01904826 JB |
838 | /* Assuming TID referrs to an SPE process, set the top halves of TID's |
839 | general-purpose registers and its SPE-specific registers to the | |
840 | values in EVRREGSET. If we don't support PTRACE_SETEVRREGS, do | |
841 | nothing. | |
842 | ||
843 | All the logic to deal with whether or not the PTRACE_GETEVRREGS and | |
844 | PTRACE_SETEVRREGS requests are supported is isolated here, and in | |
845 | get_spe_registers. */ | |
846 | static void | |
847 | set_spe_registers (int tid, struct gdb_evrregset_t *evrregset) | |
848 | { | |
849 | if (have_ptrace_getsetevrregs) | |
850 | { | |
851 | if (ptrace (PTRACE_SETEVRREGS, tid, 0, evrregset) >= 0) | |
852 | return; | |
853 | else | |
854 | { | |
855 | /* EIO means that the PTRACE_SETEVRREGS request isn't | |
856 | supported; we fail silently, and don't try the call | |
857 | again. */ | |
858 | if (errno == EIO) | |
859 | have_ptrace_getsetevrregs = 0; | |
860 | else | |
861 | /* Anything else needs to be reported. */ | |
e2e0b3e5 | 862 | perror_with_name (_("Unable to set SPE registers")); |
01904826 JB |
863 | } |
864 | } | |
865 | } | |
866 | ||
6ced10dd JB |
867 | /* Write GDB's value for the SPE-specific raw register REGNO to TID. |
868 | If REGNO is -1, write the values of all the SPE-specific | |
869 | registers. */ | |
01904826 | 870 | static void |
56be3814 | 871 | store_spe_register (const struct regcache *regcache, int tid, int regno) |
01904826 | 872 | { |
ac7936df | 873 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 874 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
01904826 JB |
875 | struct gdb_evrregset_t evrregs; |
876 | ||
6ced10dd | 877 | gdb_assert (sizeof (evrregs.evr[0]) |
40a6adc1 | 878 | == register_size (gdbarch, tdep->ppc_ev0_upper_regnum)); |
6ced10dd | 879 | gdb_assert (sizeof (evrregs.acc) |
40a6adc1 | 880 | == register_size (gdbarch, tdep->ppc_acc_regnum)); |
6ced10dd | 881 | gdb_assert (sizeof (evrregs.spefscr) |
40a6adc1 | 882 | == register_size (gdbarch, tdep->ppc_spefscr_regnum)); |
01904826 | 883 | |
6ced10dd JB |
884 | if (regno == -1) |
885 | /* Since we're going to write out every register, the code below | |
886 | should store to every field of evrregs; if that doesn't happen, | |
887 | make it obvious by initializing it with suspicious values. */ | |
888 | memset (&evrregs, 42, sizeof (evrregs)); | |
889 | else | |
890 | /* We can only read and write the entire EVR register set at a | |
891 | time, so to write just a single register, we do a | |
892 | read-modify-write maneuver. */ | |
893 | get_spe_registers (tid, &evrregs); | |
894 | ||
895 | if (regno == -1) | |
01904826 | 896 | { |
6ced10dd JB |
897 | int i; |
898 | ||
899 | for (i = 0; i < ppc_num_gprs; i++) | |
56be3814 | 900 | regcache_raw_collect (regcache, |
6ced10dd JB |
901 | tdep->ppc_ev0_upper_regnum + i, |
902 | &evrregs.evr[i]); | |
01904826 | 903 | } |
6ced10dd JB |
904 | else if (tdep->ppc_ev0_upper_regnum <= regno |
905 | && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs) | |
56be3814 | 906 | regcache_raw_collect (regcache, regno, |
6ced10dd JB |
907 | &evrregs.evr[regno - tdep->ppc_ev0_upper_regnum]); |
908 | ||
909 | if (regno == -1 | |
910 | || regno == tdep->ppc_acc_regnum) | |
56be3814 | 911 | regcache_raw_collect (regcache, |
6ced10dd JB |
912 | tdep->ppc_acc_regnum, |
913 | &evrregs.acc); | |
914 | ||
915 | if (regno == -1 | |
916 | || regno == tdep->ppc_spefscr_regnum) | |
56be3814 | 917 | regcache_raw_collect (regcache, |
6ced10dd JB |
918 | tdep->ppc_spefscr_regnum, |
919 | &evrregs.spefscr); | |
01904826 JB |
920 | |
921 | /* Write back the modified register set. */ | |
922 | set_spe_registers (tid, &evrregs); | |
923 | } | |
924 | ||
45229ea4 | 925 | static void |
56be3814 | 926 | store_register (const struct regcache *regcache, int tid, int regno) |
45229ea4 | 927 | { |
ac7936df | 928 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 929 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
45229ea4 | 930 | /* This isn't really an address. But ptrace thinks of it as one. */ |
e101270f | 931 | CORE_ADDR regaddr = ppc_register_u_addr (gdbarch, regno); |
52f0bd74 | 932 | int i; |
4a19ea35 | 933 | size_t bytes_to_transfer; |
0f068fb5 | 934 | gdb_byte buf[PPC_MAX_REGISTER_SIZE]; |
45229ea4 | 935 | |
be8626e0 | 936 | if (altivec_register_p (gdbarch, regno)) |
45229ea4 | 937 | { |
1d75a658 | 938 | store_altivec_registers (regcache, tid, regno); |
45229ea4 EZ |
939 | return; |
940 | } | |
604c2f83 LM |
941 | if (vsx_register_p (gdbarch, regno)) |
942 | { | |
2c3305f6 | 943 | store_vsx_registers (regcache, tid, regno); |
604c2f83 LM |
944 | return; |
945 | } | |
be8626e0 | 946 | else if (spe_register_p (gdbarch, regno)) |
01904826 | 947 | { |
56be3814 | 948 | store_spe_register (regcache, tid, regno); |
01904826 JB |
949 | return; |
950 | } | |
45229ea4 | 951 | |
9abe5450 EZ |
952 | if (regaddr == -1) |
953 | return; | |
954 | ||
4a19ea35 JB |
955 | /* First collect the register. Keep in mind that the regcache's |
956 | idea of the register's size may not be a multiple of sizeof | |
411cb3f9 | 957 | (long). */ |
56d0d96a | 958 | memset (buf, 0, sizeof buf); |
40a6adc1 MD |
959 | bytes_to_transfer = align_up (register_size (gdbarch, regno), sizeof (long)); |
960 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) | |
4a19ea35 JB |
961 | { |
962 | /* Little-endian values always sit at the left end of the buffer. */ | |
56be3814 | 963 | regcache_raw_collect (regcache, regno, buf); |
4a19ea35 | 964 | } |
40a6adc1 | 965 | else if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
4a19ea35 JB |
966 | { |
967 | /* Big-endian values sit at the right end of the buffer. */ | |
40a6adc1 | 968 | size_t padding = (bytes_to_transfer - register_size (gdbarch, regno)); |
56be3814 | 969 | regcache_raw_collect (regcache, regno, buf + padding); |
4a19ea35 JB |
970 | } |
971 | ||
411cb3f9 | 972 | for (i = 0; i < bytes_to_transfer; i += sizeof (long)) |
45229ea4 | 973 | { |
11fde611 JK |
974 | long l; |
975 | ||
976 | memcpy (&l, &buf[i], sizeof (l)); | |
45229ea4 | 977 | errno = 0; |
11fde611 | 978 | ptrace (PTRACE_POKEUSER, tid, (PTRACE_TYPE_ARG3) regaddr, l); |
411cb3f9 | 979 | regaddr += sizeof (long); |
e3f36dbd KB |
980 | |
981 | if (errno == EIO | |
7284e1be UW |
982 | && (regno == tdep->ppc_fpscr_regnum |
983 | || regno == PPC_ORIG_R3_REGNUM | |
984 | || regno == PPC_TRAP_REGNUM)) | |
e3f36dbd | 985 | { |
7284e1be UW |
986 | /* Some older kernel versions don't allow fpscr, orig_r3 |
987 | or trap to be written. */ | |
e3f36dbd KB |
988 | continue; |
989 | } | |
990 | ||
45229ea4 EZ |
991 | if (errno != 0) |
992 | { | |
bc97b3ba | 993 | char message[128]; |
8c042590 PM |
994 | xsnprintf (message, sizeof (message), "writing register %s (#%d)", |
995 | gdbarch_register_name (gdbarch, regno), regno); | |
bc97b3ba | 996 | perror_with_name (message); |
45229ea4 EZ |
997 | } |
998 | } | |
999 | } | |
1000 | ||
1dfe79e8 SDJ |
1001 | /* This function actually issues the request to ptrace, telling |
1002 | it to store all general-purpose registers present in the specified | |
1003 | regset. | |
1004 | ||
1005 | If the ptrace request does not exist, this function returns 0 | |
1006 | and properly sets the have_ptrace_* flag. If the request fails, | |
1007 | this function calls perror_with_name. Otherwise, if the request | |
1008 | succeeds, then the regcache is stored and 1 is returned. */ | |
1009 | static int | |
1010 | store_all_gp_regs (const struct regcache *regcache, int tid, int regno) | |
1011 | { | |
ac7936df | 1012 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
1013 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1014 | gdb_gregset_t gregset; | |
1015 | ||
1016 | if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0) | |
1017 | { | |
1018 | if (errno == EIO) | |
1019 | { | |
1020 | have_ptrace_getsetregs = 0; | |
1021 | return 0; | |
1022 | } | |
1023 | perror_with_name (_("Couldn't get general-purpose registers.")); | |
1024 | } | |
1025 | ||
1026 | fill_gregset (regcache, &gregset, regno); | |
1027 | ||
1028 | if (ptrace (PTRACE_SETREGS, tid, 0, (void *) &gregset) < 0) | |
1029 | { | |
1030 | if (errno == EIO) | |
1031 | { | |
1032 | have_ptrace_getsetregs = 0; | |
1033 | return 0; | |
1034 | } | |
1035 | perror_with_name (_("Couldn't set general-purpose registers.")); | |
1036 | } | |
1037 | ||
1038 | return 1; | |
1039 | } | |
1040 | ||
1041 | /* This is a wrapper for the store_all_gp_regs function. It is | |
1042 | responsible for verifying if this target has the ptrace request | |
1043 | that can be used to store all general-purpose registers at one | |
1044 | shot. If it doesn't, then we should store them using the | |
1045 | old-fashioned way, which is to iterate over the registers and | |
1046 | store them one by one. */ | |
45229ea4 | 1047 | static void |
1dfe79e8 | 1048 | store_gp_regs (const struct regcache *regcache, int tid, int regno) |
45229ea4 | 1049 | { |
ac7936df | 1050 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 1051 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1dfe79e8 SDJ |
1052 | int i; |
1053 | ||
1054 | if (have_ptrace_getsetregs) | |
1055 | if (store_all_gp_regs (regcache, tid, regno)) | |
1056 | return; | |
1057 | ||
1058 | /* If we hit this point, it doesn't really matter which | |
1059 | architecture we are using. We just need to store the | |
1060 | registers in the "old-fashioned way". */ | |
6ced10dd | 1061 | for (i = 0; i < ppc_num_gprs; i++) |
56be3814 | 1062 | store_register (regcache, tid, tdep->ppc_gp0_regnum + i); |
1dfe79e8 SDJ |
1063 | } |
1064 | ||
1065 | /* This function actually issues the request to ptrace, telling | |
1066 | it to store all floating-point registers present in the specified | |
1067 | regset. | |
1068 | ||
1069 | If the ptrace request does not exist, this function returns 0 | |
1070 | and properly sets the have_ptrace_* flag. If the request fails, | |
1071 | this function calls perror_with_name. Otherwise, if the request | |
1072 | succeeds, then the regcache is stored and 1 is returned. */ | |
1073 | static int | |
1074 | store_all_fp_regs (const struct regcache *regcache, int tid, int regno) | |
1075 | { | |
1076 | gdb_fpregset_t fpregs; | |
1077 | ||
1078 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (void *) &fpregs) < 0) | |
1079 | { | |
1080 | if (errno == EIO) | |
1081 | { | |
1082 | have_ptrace_getsetfpregs = 0; | |
1083 | return 0; | |
1084 | } | |
1085 | perror_with_name (_("Couldn't get floating-point registers.")); | |
1086 | } | |
1087 | ||
1088 | fill_fpregset (regcache, &fpregs, regno); | |
1089 | ||
1090 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (void *) &fpregs) < 0) | |
1091 | { | |
1092 | if (errno == EIO) | |
1093 | { | |
1094 | have_ptrace_getsetfpregs = 0; | |
1095 | return 0; | |
1096 | } | |
1097 | perror_with_name (_("Couldn't set floating-point registers.")); | |
1098 | } | |
1099 | ||
1100 | return 1; | |
1101 | } | |
1102 | ||
1103 | /* This is a wrapper for the store_all_fp_regs function. It is | |
1104 | responsible for verifying if this target has the ptrace request | |
1105 | that can be used to store all floating-point registers at one | |
1106 | shot. If it doesn't, then we should store them using the | |
1107 | old-fashioned way, which is to iterate over the registers and | |
1108 | store them one by one. */ | |
1109 | static void | |
1110 | store_fp_regs (const struct regcache *regcache, int tid, int regno) | |
1111 | { | |
ac7936df | 1112 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
1113 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1114 | int i; | |
1115 | ||
1116 | if (have_ptrace_getsetfpregs) | |
1117 | if (store_all_fp_regs (regcache, tid, regno)) | |
1118 | return; | |
1119 | ||
1120 | /* If we hit this point, it doesn't really matter which | |
1121 | architecture we are using. We just need to store the | |
1122 | registers in the "old-fashioned way". */ | |
1123 | for (i = 0; i < ppc_num_fprs; i++) | |
1124 | store_register (regcache, tid, tdep->ppc_fp0_regnum + i); | |
1125 | } | |
1126 | ||
1127 | static void | |
1128 | store_ppc_registers (const struct regcache *regcache, int tid) | |
1129 | { | |
1130 | int i; | |
ac7936df | 1131 | struct gdbarch *gdbarch = regcache->arch (); |
1dfe79e8 SDJ |
1132 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1133 | ||
1134 | store_gp_regs (regcache, tid, -1); | |
32b99774 | 1135 | if (tdep->ppc_fp0_regnum >= 0) |
1dfe79e8 | 1136 | store_fp_regs (regcache, tid, -1); |
40a6adc1 | 1137 | store_register (regcache, tid, gdbarch_pc_regnum (gdbarch)); |
32b99774 | 1138 | if (tdep->ppc_ps_regnum != -1) |
56be3814 | 1139 | store_register (regcache, tid, tdep->ppc_ps_regnum); |
32b99774 | 1140 | if (tdep->ppc_cr_regnum != -1) |
56be3814 | 1141 | store_register (regcache, tid, tdep->ppc_cr_regnum); |
32b99774 | 1142 | if (tdep->ppc_lr_regnum != -1) |
56be3814 | 1143 | store_register (regcache, tid, tdep->ppc_lr_regnum); |
32b99774 | 1144 | if (tdep->ppc_ctr_regnum != -1) |
56be3814 | 1145 | store_register (regcache, tid, tdep->ppc_ctr_regnum); |
32b99774 | 1146 | if (tdep->ppc_xer_regnum != -1) |
56be3814 | 1147 | store_register (regcache, tid, tdep->ppc_xer_regnum); |
e3f36dbd | 1148 | if (tdep->ppc_mq_regnum != -1) |
56be3814 | 1149 | store_register (regcache, tid, tdep->ppc_mq_regnum); |
32b99774 | 1150 | if (tdep->ppc_fpscr_regnum != -1) |
56be3814 | 1151 | store_register (regcache, tid, tdep->ppc_fpscr_regnum); |
7284e1be UW |
1152 | if (ppc_linux_trap_reg_p (gdbarch)) |
1153 | { | |
1154 | store_register (regcache, tid, PPC_ORIG_R3_REGNUM); | |
1155 | store_register (regcache, tid, PPC_TRAP_REGNUM); | |
1156 | } | |
9abe5450 EZ |
1157 | if (have_ptrace_getvrregs) |
1158 | if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) | |
1d75a658 | 1159 | store_altivec_registers (regcache, tid, -1); |
604c2f83 LM |
1160 | if (have_ptrace_getsetvsxregs) |
1161 | if (tdep->ppc_vsr0_upper_regnum != -1) | |
2c3305f6 | 1162 | store_vsx_registers (regcache, tid, -1); |
6ced10dd | 1163 | if (tdep->ppc_ev0_upper_regnum >= 0) |
56be3814 | 1164 | store_spe_register (regcache, tid, -1); |
45229ea4 EZ |
1165 | } |
1166 | ||
6ffbb7ab | 1167 | /* Fetch the AT_HWCAP entry from the aux vector. */ |
0ec848ad | 1168 | static CORE_ADDR |
b261e0c5 | 1169 | ppc_linux_get_hwcap (void) |
6ffbb7ab TJB |
1170 | { |
1171 | CORE_ADDR field; | |
1172 | ||
0ec848ad PFC |
1173 | if (target_auxv_search (target_stack, AT_HWCAP, &field) != 1) |
1174 | return 0; | |
6ffbb7ab | 1175 | |
0ec848ad | 1176 | return field; |
6ffbb7ab TJB |
1177 | } |
1178 | ||
1179 | /* The cached DABR value, to install in new threads. | |
926bf92d UW |
1180 | This variable is used when the PowerPC HWDEBUG ptrace |
1181 | interface is not available. */ | |
6ffbb7ab TJB |
1182 | static long saved_dabr_value; |
1183 | ||
1184 | /* Global structure that will store information about the available | |
926bf92d UW |
1185 | features provided by the PowerPC HWDEBUG ptrace interface. */ |
1186 | static struct ppc_debug_info hwdebug_info; | |
6ffbb7ab TJB |
1187 | |
1188 | /* Global variable that holds the maximum number of slots that the | |
926bf92d UW |
1189 | kernel will use. This is only used when PowerPC HWDEBUG ptrace interface |
1190 | is available. */ | |
6ffbb7ab TJB |
1191 | static size_t max_slots_number = 0; |
1192 | ||
1193 | struct hw_break_tuple | |
1194 | { | |
1195 | long slot; | |
1196 | struct ppc_hw_breakpoint *hw_break; | |
1197 | }; | |
1198 | ||
1199 | /* This is an internal VEC created to store information about *points inserted | |
926bf92d UW |
1200 | for each thread. This is used when PowerPC HWDEBUG ptrace interface is |
1201 | available. */ | |
6ffbb7ab TJB |
1202 | typedef struct thread_points |
1203 | { | |
1204 | /* The TID to which this *point relates. */ | |
1205 | int tid; | |
1206 | /* Information about the *point, such as its address, type, etc. | |
1207 | ||
1208 | Each element inside this vector corresponds to a hardware | |
1209 | breakpoint or watchpoint in the thread represented by TID. The maximum | |
1210 | size of these vector is MAX_SLOTS_NUMBER. If the hw_break element of | |
1211 | the tuple is NULL, then the position in the vector is free. */ | |
1212 | struct hw_break_tuple *hw_breaks; | |
1213 | } *thread_points_p; | |
1214 | DEF_VEC_P (thread_points_p); | |
1215 | ||
1216 | VEC(thread_points_p) *ppc_threads = NULL; | |
1217 | ||
926bf92d UW |
1218 | /* The version of the PowerPC HWDEBUG kernel interface that we will use, if |
1219 | available. */ | |
6ffbb7ab TJB |
1220 | #define PPC_DEBUG_CURRENT_VERSION 1 |
1221 | ||
926bf92d | 1222 | /* Returns non-zero if we support the PowerPC HWDEBUG ptrace interface. */ |
e0d24f8d | 1223 | static int |
926bf92d | 1224 | have_ptrace_hwdebug_interface (void) |
e0d24f8d | 1225 | { |
926bf92d | 1226 | static int have_ptrace_hwdebug_interface = -1; |
e0d24f8d | 1227 | |
926bf92d | 1228 | if (have_ptrace_hwdebug_interface == -1) |
6ffbb7ab TJB |
1229 | { |
1230 | int tid; | |
e0d24f8d | 1231 | |
dfd4cc63 | 1232 | tid = ptid_get_lwp (inferior_ptid); |
6ffbb7ab | 1233 | if (tid == 0) |
dfd4cc63 | 1234 | tid = ptid_get_pid (inferior_ptid); |
e0d24f8d | 1235 | |
926bf92d UW |
1236 | /* Check for kernel support for PowerPC HWDEBUG ptrace interface. */ |
1237 | if (ptrace (PPC_PTRACE_GETHWDBGINFO, tid, 0, &hwdebug_info) >= 0) | |
6ffbb7ab | 1238 | { |
926bf92d | 1239 | /* Check whether PowerPC HWDEBUG ptrace interface is functional and |
0c56f59b | 1240 | provides any supported feature. */ |
926bf92d | 1241 | if (hwdebug_info.features != 0) |
0c56f59b | 1242 | { |
926bf92d UW |
1243 | have_ptrace_hwdebug_interface = 1; |
1244 | max_slots_number = hwdebug_info.num_instruction_bps | |
1245 | + hwdebug_info.num_data_bps | |
1246 | + hwdebug_info.num_condition_regs; | |
1247 | return have_ptrace_hwdebug_interface; | |
0c56f59b | 1248 | } |
6ffbb7ab | 1249 | } |
926bf92d UW |
1250 | /* Old school interface and no PowerPC HWDEBUG ptrace support. */ |
1251 | have_ptrace_hwdebug_interface = 0; | |
1252 | memset (&hwdebug_info, 0, sizeof (struct ppc_debug_info)); | |
6ffbb7ab TJB |
1253 | } |
1254 | ||
926bf92d | 1255 | return have_ptrace_hwdebug_interface; |
e0d24f8d WZ |
1256 | } |
1257 | ||
f6ac5f3d PA |
1258 | int |
1259 | ppc_linux_nat_target::can_use_hw_breakpoint (enum bptype type, int cnt, int ot) | |
b7622095 | 1260 | { |
6ffbb7ab | 1261 | int total_hw_wp, total_hw_bp; |
b7622095 | 1262 | |
926bf92d | 1263 | if (have_ptrace_hwdebug_interface ()) |
6ffbb7ab | 1264 | { |
926bf92d UW |
1265 | /* When PowerPC HWDEBUG ptrace interface is available, the number of |
1266 | available hardware watchpoints and breakpoints is stored at the | |
1267 | hwdebug_info struct. */ | |
1268 | total_hw_bp = hwdebug_info.num_instruction_bps; | |
1269 | total_hw_wp = hwdebug_info.num_data_bps; | |
6ffbb7ab TJB |
1270 | } |
1271 | else | |
1272 | { | |
926bf92d UW |
1273 | /* When we do not have PowerPC HWDEBUG ptrace interface, we should |
1274 | consider having 1 hardware watchpoint and no hardware breakpoints. */ | |
6ffbb7ab TJB |
1275 | total_hw_bp = 0; |
1276 | total_hw_wp = 1; | |
1277 | } | |
b7622095 | 1278 | |
6ffbb7ab TJB |
1279 | if (type == bp_hardware_watchpoint || type == bp_read_watchpoint |
1280 | || type == bp_access_watchpoint || type == bp_watchpoint) | |
1281 | { | |
bb08bdbd | 1282 | if (cnt + ot > total_hw_wp) |
6ffbb7ab TJB |
1283 | return -1; |
1284 | } | |
1285 | else if (type == bp_hardware_breakpoint) | |
1286 | { | |
572f6555 EBM |
1287 | if (total_hw_bp == 0) |
1288 | { | |
1289 | /* No hardware breakpoint support. */ | |
1290 | return 0; | |
1291 | } | |
6ffbb7ab TJB |
1292 | if (cnt > total_hw_bp) |
1293 | return -1; | |
1294 | } | |
1295 | ||
926bf92d | 1296 | if (!have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
1297 | { |
1298 | int tid; | |
1299 | ptid_t ptid = inferior_ptid; | |
1300 | ||
0df8b418 MS |
1301 | /* We need to know whether ptrace supports PTRACE_SET_DEBUGREG |
1302 | and whether the target has DABR. If either answer is no, the | |
1303 | ptrace call will return -1. Fail in that case. */ | |
dfd4cc63 | 1304 | tid = ptid_get_lwp (ptid); |
6ffbb7ab | 1305 | if (tid == 0) |
dfd4cc63 | 1306 | tid = ptid_get_pid (ptid); |
6ffbb7ab TJB |
1307 | |
1308 | if (ptrace (PTRACE_SET_DEBUGREG, tid, 0, 0) == -1) | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | return 1; | |
b7622095 LM |
1313 | } |
1314 | ||
f6ac5f3d PA |
1315 | int |
1316 | ppc_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
e0d24f8d WZ |
1317 | { |
1318 | /* Handle sub-8-byte quantities. */ | |
1319 | if (len <= 0) | |
1320 | return 0; | |
1321 | ||
926bf92d UW |
1322 | /* The PowerPC HWDEBUG ptrace interface tells if there are alignment |
1323 | restrictions for watchpoints in the processors. In that case, we use that | |
1324 | information to determine the hardcoded watchable region for | |
1325 | watchpoints. */ | |
1326 | if (have_ptrace_hwdebug_interface ()) | |
6ffbb7ab | 1327 | { |
e23b9d6e | 1328 | int region_size; |
4feebbdd EBM |
1329 | /* Embedded DAC-based processors, like the PowerPC 440 have ranged |
1330 | watchpoints and can watch any access within an arbitrary memory | |
1331 | region. This is useful to watch arrays and structs, for instance. It | |
1332 | takes two hardware watchpoints though. */ | |
e09342b5 | 1333 | if (len > 1 |
926bf92d | 1334 | && hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_RANGE |
4feebbdd | 1335 | && ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) |
e09342b5 | 1336 | return 2; |
e23b9d6e UW |
1337 | /* Check if the processor provides DAWR interface. */ |
1338 | if (hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_DAWR) | |
1339 | /* DAWR interface allows to watch up to 512 byte wide ranges which | |
1340 | can't cross a 512 byte boundary. */ | |
1341 | region_size = 512; | |
1342 | else | |
1343 | region_size = hwdebug_info.data_bp_alignment; | |
4feebbdd EBM |
1344 | /* Server processors provide one hardware watchpoint and addr+len should |
1345 | fall in the watchable region provided by the ptrace interface. */ | |
e23b9d6e UW |
1346 | if (region_size |
1347 | && (addr + len > (addr & ~(region_size - 1)) + region_size)) | |
0cf6dd15 | 1348 | return 0; |
6ffbb7ab | 1349 | } |
b7622095 | 1350 | /* addr+len must fall in the 8 byte watchable region for DABR-based |
926bf92d UW |
1351 | processors (i.e., server processors). Without the new PowerPC HWDEBUG |
1352 | ptrace interface, DAC-based processors (i.e., embedded processors) will | |
1353 | use addresses aligned to 4-bytes due to the way the read/write flags are | |
6ffbb7ab TJB |
1354 | passed in the old ptrace interface. */ |
1355 | else if (((ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) | |
1356 | && (addr + len) > (addr & ~3) + 4) | |
1357 | || (addr + len) > (addr & ~7) + 8) | |
e0d24f8d WZ |
1358 | return 0; |
1359 | ||
1360 | return 1; | |
1361 | } | |
1362 | ||
6ffbb7ab | 1363 | /* This function compares two ppc_hw_breakpoint structs field-by-field. */ |
e4166a49 | 1364 | static int |
926bf92d | 1365 | hwdebug_point_cmp (struct ppc_hw_breakpoint *a, struct ppc_hw_breakpoint *b) |
6ffbb7ab | 1366 | { |
ad422571 TJB |
1367 | return (a->trigger_type == b->trigger_type |
1368 | && a->addr_mode == b->addr_mode | |
1369 | && a->condition_mode == b->condition_mode | |
1370 | && a->addr == b->addr | |
1371 | && a->addr2 == b->addr2 | |
6ffbb7ab TJB |
1372 | && a->condition_value == b->condition_value); |
1373 | } | |
1374 | ||
1375 | /* This function can be used to retrieve a thread_points by the TID of the | |
1376 | related process/thread. If nothing has been found, and ALLOC_NEW is 0, | |
1377 | it returns NULL. If ALLOC_NEW is non-zero, a new thread_points for the | |
1378 | provided TID will be created and returned. */ | |
1379 | static struct thread_points * | |
926bf92d | 1380 | hwdebug_find_thread_points_by_tid (int tid, int alloc_new) |
6ffbb7ab TJB |
1381 | { |
1382 | int i; | |
1383 | struct thread_points *t; | |
1384 | ||
1385 | for (i = 0; VEC_iterate (thread_points_p, ppc_threads, i, t); i++) | |
1386 | if (t->tid == tid) | |
1387 | return t; | |
1388 | ||
1389 | t = NULL; | |
1390 | ||
1391 | /* Do we need to allocate a new point_item | |
1392 | if the wanted one does not exist? */ | |
1393 | if (alloc_new) | |
1394 | { | |
8d749320 SM |
1395 | t = XNEW (struct thread_points); |
1396 | t->hw_breaks = XCNEWVEC (struct hw_break_tuple, max_slots_number); | |
6ffbb7ab TJB |
1397 | t->tid = tid; |
1398 | VEC_safe_push (thread_points_p, ppc_threads, t); | |
1399 | } | |
1400 | ||
1401 | return t; | |
1402 | } | |
1403 | ||
1404 | /* This function is a generic wrapper that is responsible for inserting a | |
1405 | *point (i.e., calling `ptrace' in order to issue the request to the | |
1406 | kernel) and registering it internally in GDB. */ | |
1407 | static void | |
926bf92d | 1408 | hwdebug_insert_point (struct ppc_hw_breakpoint *b, int tid) |
6ffbb7ab TJB |
1409 | { |
1410 | int i; | |
1411 | long slot; | |
a90ecff8 | 1412 | gdb::unique_xmalloc_ptr<ppc_hw_breakpoint> p (XDUP (ppc_hw_breakpoint, b)); |
6ffbb7ab | 1413 | struct hw_break_tuple *hw_breaks; |
6ffbb7ab TJB |
1414 | struct thread_points *t; |
1415 | struct hw_break_tuple *tuple; | |
1416 | ||
6ffbb7ab | 1417 | errno = 0; |
a90ecff8 | 1418 | slot = ptrace (PPC_PTRACE_SETHWDEBUG, tid, 0, p.get ()); |
6ffbb7ab TJB |
1419 | if (slot < 0) |
1420 | perror_with_name (_("Unexpected error setting breakpoint or watchpoint")); | |
1421 | ||
1422 | /* Everything went fine, so we have to register this *point. */ | |
926bf92d | 1423 | t = hwdebug_find_thread_points_by_tid (tid, 1); |
6ffbb7ab TJB |
1424 | gdb_assert (t != NULL); |
1425 | hw_breaks = t->hw_breaks; | |
1426 | ||
1427 | /* Find a free element in the hw_breaks vector. */ | |
1428 | for (i = 0; i < max_slots_number; i++) | |
1429 | if (hw_breaks[i].hw_break == NULL) | |
1430 | { | |
1431 | hw_breaks[i].slot = slot; | |
a90ecff8 | 1432 | hw_breaks[i].hw_break = p.release (); |
6ffbb7ab TJB |
1433 | break; |
1434 | } | |
1435 | ||
1436 | gdb_assert (i != max_slots_number); | |
6ffbb7ab TJB |
1437 | } |
1438 | ||
1439 | /* This function is a generic wrapper that is responsible for removing a | |
1440 | *point (i.e., calling `ptrace' in order to issue the request to the | |
1441 | kernel), and unregistering it internally at GDB. */ | |
1442 | static void | |
926bf92d | 1443 | hwdebug_remove_point (struct ppc_hw_breakpoint *b, int tid) |
6ffbb7ab TJB |
1444 | { |
1445 | int i; | |
1446 | struct hw_break_tuple *hw_breaks; | |
1447 | struct thread_points *t; | |
1448 | ||
926bf92d | 1449 | t = hwdebug_find_thread_points_by_tid (tid, 0); |
6ffbb7ab TJB |
1450 | gdb_assert (t != NULL); |
1451 | hw_breaks = t->hw_breaks; | |
1452 | ||
1453 | for (i = 0; i < max_slots_number; i++) | |
926bf92d | 1454 | if (hw_breaks[i].hw_break && hwdebug_point_cmp (hw_breaks[i].hw_break, b)) |
6ffbb7ab TJB |
1455 | break; |
1456 | ||
1457 | gdb_assert (i != max_slots_number); | |
1458 | ||
1459 | /* We have to ignore ENOENT errors because the kernel implements hardware | |
1460 | breakpoints/watchpoints as "one-shot", that is, they are automatically | |
1461 | deleted when hit. */ | |
1462 | errno = 0; | |
1463 | if (ptrace (PPC_PTRACE_DELHWDEBUG, tid, 0, hw_breaks[i].slot) < 0) | |
1464 | if (errno != ENOENT) | |
0df8b418 MS |
1465 | perror_with_name (_("Unexpected error deleting " |
1466 | "breakpoint or watchpoint")); | |
6ffbb7ab TJB |
1467 | |
1468 | xfree (hw_breaks[i].hw_break); | |
1469 | hw_breaks[i].hw_break = NULL; | |
1470 | } | |
9f0bdab8 | 1471 | |
f1310107 TJB |
1472 | /* Return the number of registers needed for a ranged breakpoint. */ |
1473 | ||
f6ac5f3d PA |
1474 | int |
1475 | ppc_linux_nat_target::ranged_break_num_registers () | |
f1310107 | 1476 | { |
926bf92d UW |
1477 | return ((have_ptrace_hwdebug_interface () |
1478 | && hwdebug_info.features & PPC_DEBUG_FEATURE_INSN_BP_RANGE)? | |
f1310107 TJB |
1479 | 2 : -1); |
1480 | } | |
1481 | ||
1482 | /* Insert the hardware breakpoint described by BP_TGT. Returns 0 for | |
1483 | success, 1 if hardware breakpoints are not supported or -1 for failure. */ | |
1484 | ||
f6ac5f3d PA |
1485 | int |
1486 | ppc_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch, | |
1487 | struct bp_target_info *bp_tgt) | |
e0d24f8d | 1488 | { |
9f0bdab8 | 1489 | struct lwp_info *lp; |
6ffbb7ab TJB |
1490 | struct ppc_hw_breakpoint p; |
1491 | ||
926bf92d | 1492 | if (!have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
1493 | return -1; |
1494 | ||
ad422571 TJB |
1495 | p.version = PPC_DEBUG_CURRENT_VERSION; |
1496 | p.trigger_type = PPC_BREAKPOINT_TRIGGER_EXECUTE; | |
ad422571 | 1497 | p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE; |
0d5ed153 | 1498 | p.addr = (uint64_t) (bp_tgt->placed_address = bp_tgt->reqstd_address); |
6ffbb7ab TJB |
1499 | p.condition_value = 0; |
1500 | ||
f1310107 TJB |
1501 | if (bp_tgt->length) |
1502 | { | |
1503 | p.addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE; | |
1504 | ||
1505 | /* The breakpoint will trigger if the address of the instruction is | |
1506 | within the defined range, as follows: p.addr <= address < p.addr2. */ | |
1507 | p.addr2 = (uint64_t) bp_tgt->placed_address + bp_tgt->length; | |
1508 | } | |
1509 | else | |
1510 | { | |
1511 | p.addr_mode = PPC_BREAKPOINT_MODE_EXACT; | |
1512 | p.addr2 = 0; | |
1513 | } | |
1514 | ||
4c38200f | 1515 | ALL_LWPS (lp) |
dfd4cc63 | 1516 | hwdebug_insert_point (&p, ptid_get_lwp (lp->ptid)); |
6ffbb7ab TJB |
1517 | |
1518 | return 0; | |
1519 | } | |
1520 | ||
f6ac5f3d PA |
1521 | int |
1522 | ppc_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch, | |
1523 | struct bp_target_info *bp_tgt) | |
6ffbb7ab | 1524 | { |
6ffbb7ab TJB |
1525 | struct lwp_info *lp; |
1526 | struct ppc_hw_breakpoint p; | |
b7622095 | 1527 | |
926bf92d | 1528 | if (!have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
1529 | return -1; |
1530 | ||
ad422571 TJB |
1531 | p.version = PPC_DEBUG_CURRENT_VERSION; |
1532 | p.trigger_type = PPC_BREAKPOINT_TRIGGER_EXECUTE; | |
ad422571 TJB |
1533 | p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE; |
1534 | p.addr = (uint64_t) bp_tgt->placed_address; | |
6ffbb7ab TJB |
1535 | p.condition_value = 0; |
1536 | ||
f1310107 TJB |
1537 | if (bp_tgt->length) |
1538 | { | |
1539 | p.addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE; | |
1540 | ||
1541 | /* The breakpoint will trigger if the address of the instruction is within | |
1542 | the defined range, as follows: p.addr <= address < p.addr2. */ | |
1543 | p.addr2 = (uint64_t) bp_tgt->placed_address + bp_tgt->length; | |
1544 | } | |
1545 | else | |
1546 | { | |
1547 | p.addr_mode = PPC_BREAKPOINT_MODE_EXACT; | |
1548 | p.addr2 = 0; | |
1549 | } | |
1550 | ||
4c38200f | 1551 | ALL_LWPS (lp) |
dfd4cc63 | 1552 | hwdebug_remove_point (&p, ptid_get_lwp (lp->ptid)); |
6ffbb7ab TJB |
1553 | |
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | static int | |
e76460db | 1558 | get_trigger_type (enum target_hw_bp_type type) |
6ffbb7ab TJB |
1559 | { |
1560 | int t; | |
1561 | ||
e76460db | 1562 | if (type == hw_read) |
6ffbb7ab | 1563 | t = PPC_BREAKPOINT_TRIGGER_READ; |
e76460db | 1564 | else if (type == hw_write) |
6ffbb7ab | 1565 | t = PPC_BREAKPOINT_TRIGGER_WRITE; |
b7622095 | 1566 | else |
6ffbb7ab TJB |
1567 | t = PPC_BREAKPOINT_TRIGGER_READ | PPC_BREAKPOINT_TRIGGER_WRITE; |
1568 | ||
1569 | return t; | |
1570 | } | |
1571 | ||
9c06b0b4 TJB |
1572 | /* Insert a new masked watchpoint at ADDR using the mask MASK. |
1573 | RW may be hw_read for a read watchpoint, hw_write for a write watchpoint | |
1574 | or hw_access for an access watchpoint. Returns 0 on success and throws | |
1575 | an error on failure. */ | |
1576 | ||
f6ac5f3d PA |
1577 | int |
1578 | ppc_linux_nat_target::insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, | |
1579 | target_hw_bp_type rw) | |
9c06b0b4 | 1580 | { |
9c06b0b4 TJB |
1581 | struct lwp_info *lp; |
1582 | struct ppc_hw_breakpoint p; | |
1583 | ||
926bf92d | 1584 | gdb_assert (have_ptrace_hwdebug_interface ()); |
9c06b0b4 TJB |
1585 | |
1586 | p.version = PPC_DEBUG_CURRENT_VERSION; | |
1587 | p.trigger_type = get_trigger_type (rw); | |
1588 | p.addr_mode = PPC_BREAKPOINT_MODE_MASK; | |
1589 | p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE; | |
1590 | p.addr = addr; | |
1591 | p.addr2 = mask; | |
1592 | p.condition_value = 0; | |
1593 | ||
4c38200f | 1594 | ALL_LWPS (lp) |
dfd4cc63 | 1595 | hwdebug_insert_point (&p, ptid_get_lwp (lp->ptid)); |
9c06b0b4 TJB |
1596 | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | /* Remove a masked watchpoint at ADDR with the mask MASK. | |
1601 | RW may be hw_read for a read watchpoint, hw_write for a write watchpoint | |
1602 | or hw_access for an access watchpoint. Returns 0 on success and throws | |
1603 | an error on failure. */ | |
1604 | ||
f6ac5f3d PA |
1605 | int |
1606 | ppc_linux_nat_target::remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, | |
1607 | target_hw_bp_type rw) | |
9c06b0b4 | 1608 | { |
9c06b0b4 TJB |
1609 | struct lwp_info *lp; |
1610 | struct ppc_hw_breakpoint p; | |
1611 | ||
926bf92d | 1612 | gdb_assert (have_ptrace_hwdebug_interface ()); |
9c06b0b4 TJB |
1613 | |
1614 | p.version = PPC_DEBUG_CURRENT_VERSION; | |
1615 | p.trigger_type = get_trigger_type (rw); | |
1616 | p.addr_mode = PPC_BREAKPOINT_MODE_MASK; | |
1617 | p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE; | |
1618 | p.addr = addr; | |
1619 | p.addr2 = mask; | |
1620 | p.condition_value = 0; | |
1621 | ||
4c38200f | 1622 | ALL_LWPS (lp) |
dfd4cc63 | 1623 | hwdebug_remove_point (&p, ptid_get_lwp (lp->ptid)); |
9c06b0b4 TJB |
1624 | |
1625 | return 0; | |
1626 | } | |
1627 | ||
0cf6dd15 TJB |
1628 | /* Check whether we have at least one free DVC register. */ |
1629 | static int | |
1630 | can_use_watchpoint_cond_accel (void) | |
1631 | { | |
1632 | struct thread_points *p; | |
dfd4cc63 | 1633 | int tid = ptid_get_lwp (inferior_ptid); |
926bf92d | 1634 | int cnt = hwdebug_info.num_condition_regs, i; |
0cf6dd15 TJB |
1635 | CORE_ADDR tmp_value; |
1636 | ||
926bf92d | 1637 | if (!have_ptrace_hwdebug_interface () || cnt == 0) |
0cf6dd15 TJB |
1638 | return 0; |
1639 | ||
926bf92d | 1640 | p = hwdebug_find_thread_points_by_tid (tid, 0); |
0cf6dd15 TJB |
1641 | |
1642 | if (p) | |
1643 | { | |
1644 | for (i = 0; i < max_slots_number; i++) | |
1645 | if (p->hw_breaks[i].hw_break != NULL | |
1646 | && (p->hw_breaks[i].hw_break->condition_mode | |
1647 | != PPC_BREAKPOINT_CONDITION_NONE)) | |
1648 | cnt--; | |
1649 | ||
1650 | /* There are no available slots now. */ | |
1651 | if (cnt <= 0) | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | return 1; | |
1656 | } | |
1657 | ||
1658 | /* Calculate the enable bits and the contents of the Data Value Compare | |
1659 | debug register present in BookE processors. | |
1660 | ||
1661 | ADDR is the address to be watched, LEN is the length of watched data | |
1662 | and DATA_VALUE is the value which will trigger the watchpoint. | |
1663 | On exit, CONDITION_MODE will hold the enable bits for the DVC, and | |
1664 | CONDITION_VALUE will hold the value which should be put in the | |
1665 | DVC register. */ | |
1666 | static void | |
1667 | calculate_dvc (CORE_ADDR addr, int len, CORE_ADDR data_value, | |
1668 | uint32_t *condition_mode, uint64_t *condition_value) | |
1669 | { | |
1670 | int i, num_byte_enable, align_offset, num_bytes_off_dvc, | |
1671 | rightmost_enabled_byte; | |
1672 | CORE_ADDR addr_end_data, addr_end_dvc; | |
1673 | ||
1674 | /* The DVC register compares bytes within fixed-length windows which | |
1675 | are word-aligned, with length equal to that of the DVC register. | |
1676 | We need to calculate where our watch region is relative to that | |
1677 | window and enable comparison of the bytes which fall within it. */ | |
1678 | ||
926bf92d | 1679 | align_offset = addr % hwdebug_info.sizeof_condition; |
0cf6dd15 TJB |
1680 | addr_end_data = addr + len; |
1681 | addr_end_dvc = (addr - align_offset | |
926bf92d | 1682 | + hwdebug_info.sizeof_condition); |
0cf6dd15 TJB |
1683 | num_bytes_off_dvc = (addr_end_data > addr_end_dvc)? |
1684 | addr_end_data - addr_end_dvc : 0; | |
1685 | num_byte_enable = len - num_bytes_off_dvc; | |
1686 | /* Here, bytes are numbered from right to left. */ | |
1687 | rightmost_enabled_byte = (addr_end_data < addr_end_dvc)? | |
1688 | addr_end_dvc - addr_end_data : 0; | |
1689 | ||
1690 | *condition_mode = PPC_BREAKPOINT_CONDITION_AND; | |
1691 | for (i = 0; i < num_byte_enable; i++) | |
0df8b418 MS |
1692 | *condition_mode |
1693 | |= PPC_BREAKPOINT_CONDITION_BE (i + rightmost_enabled_byte); | |
0cf6dd15 TJB |
1694 | |
1695 | /* Now we need to match the position within the DVC of the comparison | |
1696 | value with where the watch region is relative to the window | |
1697 | (i.e., the ALIGN_OFFSET). */ | |
1698 | ||
1699 | *condition_value = ((uint64_t) data_value >> num_bytes_off_dvc * 8 | |
1700 | << rightmost_enabled_byte * 8); | |
1701 | } | |
1702 | ||
1703 | /* Return the number of memory locations that need to be accessed to | |
1704 | evaluate the expression which generated the given value chain. | |
1705 | Returns -1 if there's any register access involved, or if there are | |
1706 | other kinds of values which are not acceptable in a condition | |
1707 | expression (e.g., lval_computed or lval_internalvar). */ | |
1708 | static int | |
a6535de1 | 1709 | num_memory_accesses (const std::vector<value_ref_ptr> &chain) |
0cf6dd15 TJB |
1710 | { |
1711 | int found_memory_cnt = 0; | |
0cf6dd15 TJB |
1712 | |
1713 | /* The idea here is that evaluating an expression generates a series | |
1714 | of values, one holding the value of every subexpression. (The | |
1715 | expression a*b+c has five subexpressions: a, b, a*b, c, and | |
1716 | a*b+c.) GDB's values hold almost enough information to establish | |
1717 | the criteria given above --- they identify memory lvalues, | |
1718 | register lvalues, computed values, etcetera. So we can evaluate | |
1719 | the expression, and then scan the chain of values that leaves | |
1720 | behind to determine the memory locations involved in the evaluation | |
1721 | of an expression. | |
1722 | ||
1723 | However, I don't think that the values returned by inferior | |
1724 | function calls are special in any way. So this function may not | |
1725 | notice that an expression contains an inferior function call. | |
1726 | FIXME. */ | |
1727 | ||
a6535de1 | 1728 | for (const value_ref_ptr &iter : chain) |
0cf6dd15 | 1729 | { |
a6535de1 TT |
1730 | struct value *v = iter.get (); |
1731 | ||
0cf6dd15 TJB |
1732 | /* Constants and values from the history are fine. */ |
1733 | if (VALUE_LVAL (v) == not_lval || deprecated_value_modifiable (v) == 0) | |
1734 | continue; | |
1735 | else if (VALUE_LVAL (v) == lval_memory) | |
1736 | { | |
1737 | /* A lazy memory lvalue is one that GDB never needed to fetch; | |
1738 | we either just used its address (e.g., `a' in `a.b') or | |
1739 | we never needed it at all (e.g., `a' in `a,b'). */ | |
1740 | if (!value_lazy (v)) | |
1741 | found_memory_cnt++; | |
1742 | } | |
0df8b418 | 1743 | /* Other kinds of values are not fine. */ |
0cf6dd15 TJB |
1744 | else |
1745 | return -1; | |
1746 | } | |
1747 | ||
1748 | return found_memory_cnt; | |
1749 | } | |
1750 | ||
1751 | /* Verifies whether the expression COND can be implemented using the | |
1752 | DVC (Data Value Compare) register in BookE processors. The expression | |
1753 | must test the watch value for equality with a constant expression. | |
1754 | If the function returns 1, DATA_VALUE will contain the constant against | |
e7db58ea TJB |
1755 | which the watch value should be compared and LEN will contain the size |
1756 | of the constant. */ | |
0cf6dd15 TJB |
1757 | static int |
1758 | check_condition (CORE_ADDR watch_addr, struct expression *cond, | |
e7db58ea | 1759 | CORE_ADDR *data_value, int *len) |
0cf6dd15 TJB |
1760 | { |
1761 | int pc = 1, num_accesses_left, num_accesses_right; | |
a6535de1 TT |
1762 | struct value *left_val, *right_val; |
1763 | std::vector<value_ref_ptr> left_chain, right_chain; | |
0cf6dd15 TJB |
1764 | |
1765 | if (cond->elts[0].opcode != BINOP_EQUAL) | |
1766 | return 0; | |
1767 | ||
3a1115a0 | 1768 | fetch_subexp_value (cond, &pc, &left_val, NULL, &left_chain, 0); |
0cf6dd15 TJB |
1769 | num_accesses_left = num_memory_accesses (left_chain); |
1770 | ||
1771 | if (left_val == NULL || num_accesses_left < 0) | |
a6535de1 | 1772 | return 0; |
0cf6dd15 | 1773 | |
3a1115a0 | 1774 | fetch_subexp_value (cond, &pc, &right_val, NULL, &right_chain, 0); |
0cf6dd15 TJB |
1775 | num_accesses_right = num_memory_accesses (right_chain); |
1776 | ||
1777 | if (right_val == NULL || num_accesses_right < 0) | |
a6535de1 | 1778 | return 0; |
0cf6dd15 TJB |
1779 | |
1780 | if (num_accesses_left == 1 && num_accesses_right == 0 | |
1781 | && VALUE_LVAL (left_val) == lval_memory | |
1782 | && value_address (left_val) == watch_addr) | |
e7db58ea TJB |
1783 | { |
1784 | *data_value = value_as_long (right_val); | |
1785 | ||
1786 | /* DATA_VALUE is the constant in RIGHT_VAL, but actually has | |
1787 | the same type as the memory region referenced by LEFT_VAL. */ | |
1788 | *len = TYPE_LENGTH (check_typedef (value_type (left_val))); | |
1789 | } | |
0cf6dd15 TJB |
1790 | else if (num_accesses_left == 0 && num_accesses_right == 1 |
1791 | && VALUE_LVAL (right_val) == lval_memory | |
1792 | && value_address (right_val) == watch_addr) | |
e7db58ea TJB |
1793 | { |
1794 | *data_value = value_as_long (left_val); | |
1795 | ||
1796 | /* DATA_VALUE is the constant in LEFT_VAL, but actually has | |
1797 | the same type as the memory region referenced by RIGHT_VAL. */ | |
1798 | *len = TYPE_LENGTH (check_typedef (value_type (right_val))); | |
1799 | } | |
0cf6dd15 | 1800 | else |
a6535de1 | 1801 | return 0; |
0cf6dd15 TJB |
1802 | |
1803 | return 1; | |
1804 | } | |
1805 | ||
1806 | /* Return non-zero if the target is capable of using hardware to evaluate | |
1807 | the condition expression, thus only triggering the watchpoint when it is | |
1808 | true. */ | |
57810aa7 | 1809 | bool |
f6ac5f3d PA |
1810 | ppc_linux_nat_target::can_accel_watchpoint_condition (CORE_ADDR addr, int len, |
1811 | int rw, | |
1812 | struct expression *cond) | |
0cf6dd15 TJB |
1813 | { |
1814 | CORE_ADDR data_value; | |
1815 | ||
926bf92d UW |
1816 | return (have_ptrace_hwdebug_interface () |
1817 | && hwdebug_info.num_condition_regs > 0 | |
e7db58ea | 1818 | && check_condition (addr, cond, &data_value, &len)); |
0cf6dd15 TJB |
1819 | } |
1820 | ||
e09342b5 TJB |
1821 | /* Set up P with the parameters necessary to request a watchpoint covering |
1822 | LEN bytes starting at ADDR and if possible with condition expression COND | |
1823 | evaluated by hardware. INSERT tells if we are creating a request for | |
1824 | inserting or removing the watchpoint. */ | |
1825 | ||
1826 | static void | |
1827 | create_watchpoint_request (struct ppc_hw_breakpoint *p, CORE_ADDR addr, | |
e76460db PA |
1828 | int len, enum target_hw_bp_type type, |
1829 | struct expression *cond, int insert) | |
e09342b5 | 1830 | { |
f16c4e8b | 1831 | if (len == 1 |
926bf92d | 1832 | || !(hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_RANGE)) |
e09342b5 TJB |
1833 | { |
1834 | int use_condition; | |
1835 | CORE_ADDR data_value; | |
1836 | ||
1837 | use_condition = (insert? can_use_watchpoint_cond_accel () | |
926bf92d | 1838 | : hwdebug_info.num_condition_regs > 0); |
e7db58ea TJB |
1839 | if (cond && use_condition && check_condition (addr, cond, |
1840 | &data_value, &len)) | |
e09342b5 TJB |
1841 | calculate_dvc (addr, len, data_value, &p->condition_mode, |
1842 | &p->condition_value); | |
1843 | else | |
1844 | { | |
1845 | p->condition_mode = PPC_BREAKPOINT_CONDITION_NONE; | |
1846 | p->condition_value = 0; | |
1847 | } | |
1848 | ||
1849 | p->addr_mode = PPC_BREAKPOINT_MODE_EXACT; | |
1850 | p->addr2 = 0; | |
1851 | } | |
1852 | else | |
1853 | { | |
1854 | p->addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE; | |
1855 | p->condition_mode = PPC_BREAKPOINT_CONDITION_NONE; | |
1856 | p->condition_value = 0; | |
1857 | ||
1858 | /* The watchpoint will trigger if the address of the memory access is | |
1859 | within the defined range, as follows: p->addr <= address < p->addr2. | |
1860 | ||
1861 | Note that the above sentence just documents how ptrace interprets | |
1862 | its arguments; the watchpoint is set to watch the range defined by | |
1863 | the user _inclusively_, as specified by the user interface. */ | |
1864 | p->addr2 = (uint64_t) addr + len; | |
1865 | } | |
1866 | ||
1867 | p->version = PPC_DEBUG_CURRENT_VERSION; | |
e76460db | 1868 | p->trigger_type = get_trigger_type (type); |
e09342b5 TJB |
1869 | p->addr = (uint64_t) addr; |
1870 | } | |
1871 | ||
f6ac5f3d PA |
1872 | int |
1873 | ppc_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len, | |
1874 | enum target_hw_bp_type type, | |
1875 | struct expression *cond) | |
6ffbb7ab TJB |
1876 | { |
1877 | struct lwp_info *lp; | |
6ffbb7ab TJB |
1878 | int ret = -1; |
1879 | ||
926bf92d | 1880 | if (have_ptrace_hwdebug_interface ()) |
e0d24f8d | 1881 | { |
6ffbb7ab TJB |
1882 | struct ppc_hw_breakpoint p; |
1883 | ||
e76460db | 1884 | create_watchpoint_request (&p, addr, len, type, cond, 1); |
6ffbb7ab | 1885 | |
4c38200f | 1886 | ALL_LWPS (lp) |
dfd4cc63 | 1887 | hwdebug_insert_point (&p, ptid_get_lwp (lp->ptid)); |
6ffbb7ab TJB |
1888 | |
1889 | ret = 0; | |
e0d24f8d | 1890 | } |
6ffbb7ab TJB |
1891 | else |
1892 | { | |
1893 | long dabr_value; | |
1894 | long read_mode, write_mode; | |
e0d24f8d | 1895 | |
6ffbb7ab TJB |
1896 | if (ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) |
1897 | { | |
1898 | /* PowerPC 440 requires only the read/write flags to be passed | |
1899 | to the kernel. */ | |
ad422571 | 1900 | read_mode = 1; |
6ffbb7ab TJB |
1901 | write_mode = 2; |
1902 | } | |
1903 | else | |
1904 | { | |
1905 | /* PowerPC 970 and other DABR-based processors are required to pass | |
1906 | the Breakpoint Translation bit together with the flags. */ | |
ad422571 | 1907 | read_mode = 5; |
6ffbb7ab TJB |
1908 | write_mode = 6; |
1909 | } | |
1c86e440 | 1910 | |
6ffbb7ab | 1911 | dabr_value = addr & ~(read_mode | write_mode); |
e76460db | 1912 | switch (type) |
6ffbb7ab TJB |
1913 | { |
1914 | case hw_read: | |
1915 | /* Set read and translate bits. */ | |
1916 | dabr_value |= read_mode; | |
1917 | break; | |
1918 | case hw_write: | |
1919 | /* Set write and translate bits. */ | |
1920 | dabr_value |= write_mode; | |
1921 | break; | |
1922 | case hw_access: | |
1923 | /* Set read, write and translate bits. */ | |
1924 | dabr_value |= read_mode | write_mode; | |
1925 | break; | |
1926 | } | |
1c86e440 | 1927 | |
6ffbb7ab TJB |
1928 | saved_dabr_value = dabr_value; |
1929 | ||
4c38200f | 1930 | ALL_LWPS (lp) |
dfd4cc63 | 1931 | if (ptrace (PTRACE_SET_DEBUGREG, ptid_get_lwp (lp->ptid), 0, |
0cf6dd15 | 1932 | saved_dabr_value) < 0) |
6ffbb7ab TJB |
1933 | return -1; |
1934 | ||
1935 | ret = 0; | |
1936 | } | |
1937 | ||
1938 | return ret; | |
e0d24f8d WZ |
1939 | } |
1940 | ||
f6ac5f3d PA |
1941 | int |
1942 | ppc_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len, | |
1943 | enum target_hw_bp_type type, | |
1944 | struct expression *cond) | |
e0d24f8d | 1945 | { |
9f0bdab8 | 1946 | struct lwp_info *lp; |
6ffbb7ab | 1947 | int ret = -1; |
9f0bdab8 | 1948 | |
926bf92d | 1949 | if (have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
1950 | { |
1951 | struct ppc_hw_breakpoint p; | |
1952 | ||
e76460db | 1953 | create_watchpoint_request (&p, addr, len, type, cond, 0); |
6ffbb7ab | 1954 | |
4c38200f | 1955 | ALL_LWPS (lp) |
dfd4cc63 | 1956 | hwdebug_remove_point (&p, ptid_get_lwp (lp->ptid)); |
6ffbb7ab TJB |
1957 | |
1958 | ret = 0; | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | saved_dabr_value = 0; | |
4c38200f | 1963 | ALL_LWPS (lp) |
dfd4cc63 | 1964 | if (ptrace (PTRACE_SET_DEBUGREG, ptid_get_lwp (lp->ptid), 0, |
0cf6dd15 | 1965 | saved_dabr_value) < 0) |
6ffbb7ab TJB |
1966 | return -1; |
1967 | ||
1968 | ret = 0; | |
1969 | } | |
1970 | ||
1971 | return ret; | |
e0d24f8d WZ |
1972 | } |
1973 | ||
135340af PA |
1974 | void |
1975 | ppc_linux_nat_target::low_new_thread (struct lwp_info *lp) | |
e0d24f8d | 1976 | { |
dfd4cc63 | 1977 | int tid = ptid_get_lwp (lp->ptid); |
6ffbb7ab | 1978 | |
926bf92d | 1979 | if (have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
1980 | { |
1981 | int i; | |
1982 | struct thread_points *p; | |
1983 | struct hw_break_tuple *hw_breaks; | |
1984 | ||
1985 | if (VEC_empty (thread_points_p, ppc_threads)) | |
1986 | return; | |
1987 | ||
0df8b418 | 1988 | /* Get a list of breakpoints from any thread. */ |
6ffbb7ab TJB |
1989 | p = VEC_last (thread_points_p, ppc_threads); |
1990 | hw_breaks = p->hw_breaks; | |
1991 | ||
0df8b418 | 1992 | /* Copy that thread's breakpoints and watchpoints to the new thread. */ |
6ffbb7ab TJB |
1993 | for (i = 0; i < max_slots_number; i++) |
1994 | if (hw_breaks[i].hw_break) | |
aacbb8a5 LM |
1995 | { |
1996 | /* Older kernels did not make new threads inherit their parent | |
1997 | thread's debug state, so we always clear the slot and replicate | |
1998 | the debug state ourselves, ensuring compatibility with all | |
1999 | kernels. */ | |
2000 | ||
2001 | /* The ppc debug resource accounting is done through "slots". | |
2002 | Ask the kernel the deallocate this specific *point's slot. */ | |
2003 | ptrace (PPC_PTRACE_DELHWDEBUG, tid, 0, hw_breaks[i].slot); | |
2004 | ||
926bf92d | 2005 | hwdebug_insert_point (hw_breaks[i].hw_break, tid); |
aacbb8a5 | 2006 | } |
6ffbb7ab TJB |
2007 | } |
2008 | else | |
2009 | ptrace (PTRACE_SET_DEBUGREG, tid, 0, saved_dabr_value); | |
2010 | } | |
2011 | ||
2012 | static void | |
2013 | ppc_linux_thread_exit (struct thread_info *tp, int silent) | |
2014 | { | |
2015 | int i; | |
dfd4cc63 | 2016 | int tid = ptid_get_lwp (tp->ptid); |
6ffbb7ab TJB |
2017 | struct hw_break_tuple *hw_breaks; |
2018 | struct thread_points *t = NULL, *p; | |
2019 | ||
926bf92d | 2020 | if (!have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
2021 | return; |
2022 | ||
2023 | for (i = 0; VEC_iterate (thread_points_p, ppc_threads, i, p); i++) | |
2024 | if (p->tid == tid) | |
2025 | { | |
2026 | t = p; | |
2027 | break; | |
2028 | } | |
2029 | ||
2030 | if (t == NULL) | |
2031 | return; | |
2032 | ||
2033 | VEC_unordered_remove (thread_points_p, ppc_threads, i); | |
2034 | ||
2035 | hw_breaks = t->hw_breaks; | |
2036 | ||
2037 | for (i = 0; i < max_slots_number; i++) | |
2038 | if (hw_breaks[i].hw_break) | |
2039 | xfree (hw_breaks[i].hw_break); | |
2040 | ||
2041 | xfree (t->hw_breaks); | |
2042 | xfree (t); | |
e0d24f8d WZ |
2043 | } |
2044 | ||
57810aa7 | 2045 | bool |
f6ac5f3d | 2046 | ppc_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p) |
e0d24f8d | 2047 | { |
f865ee35 | 2048 | siginfo_t siginfo; |
e0d24f8d | 2049 | |
f865ee35 | 2050 | if (!linux_nat_get_siginfo (inferior_ptid, &siginfo)) |
57810aa7 | 2051 | return false; |
e0d24f8d | 2052 | |
f865ee35 JK |
2053 | if (siginfo.si_signo != SIGTRAP |
2054 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
57810aa7 | 2055 | return false; |
e0d24f8d | 2056 | |
926bf92d | 2057 | if (have_ptrace_hwdebug_interface ()) |
6ffbb7ab TJB |
2058 | { |
2059 | int i; | |
2060 | struct thread_points *t; | |
2061 | struct hw_break_tuple *hw_breaks; | |
2062 | /* The index (or slot) of the *point is passed in the si_errno field. */ | |
f865ee35 | 2063 | int slot = siginfo.si_errno; |
6ffbb7ab | 2064 | |
dfd4cc63 | 2065 | t = hwdebug_find_thread_points_by_tid (ptid_get_lwp (inferior_ptid), 0); |
6ffbb7ab TJB |
2066 | |
2067 | /* Find out if this *point is a hardware breakpoint. | |
2068 | If so, we should return 0. */ | |
2069 | if (t) | |
2070 | { | |
2071 | hw_breaks = t->hw_breaks; | |
2072 | for (i = 0; i < max_slots_number; i++) | |
2073 | if (hw_breaks[i].hw_break && hw_breaks[i].slot == slot | |
2074 | && hw_breaks[i].hw_break->trigger_type | |
2075 | == PPC_BREAKPOINT_TRIGGER_EXECUTE) | |
57810aa7 | 2076 | return false; |
6ffbb7ab TJB |
2077 | } |
2078 | } | |
2079 | ||
f865ee35 | 2080 | *addr_p = (CORE_ADDR) (uintptr_t) siginfo.si_addr; |
57810aa7 | 2081 | return true; |
e0d24f8d WZ |
2082 | } |
2083 | ||
57810aa7 | 2084 | bool |
f6ac5f3d | 2085 | ppc_linux_nat_target::stopped_by_watchpoint () |
9f0bdab8 DJ |
2086 | { |
2087 | CORE_ADDR addr; | |
f6ac5f3d | 2088 | return stopped_data_address (&addr); |
9f0bdab8 DJ |
2089 | } |
2090 | ||
57810aa7 | 2091 | bool |
f6ac5f3d PA |
2092 | ppc_linux_nat_target::watchpoint_addr_within_range (CORE_ADDR addr, |
2093 | CORE_ADDR start, | |
2094 | int length) | |
5009afc5 | 2095 | { |
b7622095 LM |
2096 | int mask; |
2097 | ||
926bf92d | 2098 | if (have_ptrace_hwdebug_interface () |
6ffbb7ab TJB |
2099 | && ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) |
2100 | return start <= addr && start + length >= addr; | |
2101 | else if (ppc_linux_get_hwcap () & PPC_FEATURE_BOOKE) | |
b7622095 LM |
2102 | mask = 3; |
2103 | else | |
2104 | mask = 7; | |
2105 | ||
2106 | addr &= ~mask; | |
2107 | ||
0df8b418 | 2108 | /* Check whether [start, start+length-1] intersects [addr, addr+mask]. */ |
b7622095 | 2109 | return start <= addr + mask && start + length - 1 >= addr; |
5009afc5 AS |
2110 | } |
2111 | ||
9c06b0b4 TJB |
2112 | /* Return the number of registers needed for a masked hardware watchpoint. */ |
2113 | ||
f6ac5f3d PA |
2114 | int |
2115 | ppc_linux_nat_target::masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
9c06b0b4 | 2116 | { |
926bf92d UW |
2117 | if (!have_ptrace_hwdebug_interface () |
2118 | || (hwdebug_info.features & PPC_DEBUG_FEATURE_DATA_BP_MASK) == 0) | |
9c06b0b4 TJB |
2119 | return -1; |
2120 | else if ((mask & 0xC0000000) != 0xC0000000) | |
2121 | { | |
2122 | warning (_("The given mask covers kernel address space " | |
2123 | "and cannot be used.\n")); | |
2124 | ||
2125 | return -2; | |
2126 | } | |
2127 | else | |
2128 | return 2; | |
2129 | } | |
2130 | ||
f6ac5f3d PA |
2131 | void |
2132 | ppc_linux_nat_target::store_registers (struct regcache *regcache, int regno) | |
45229ea4 | 2133 | { |
bcc0c096 | 2134 | pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache)); |
05f13b9c | 2135 | |
45229ea4 | 2136 | if (regno >= 0) |
56be3814 | 2137 | store_register (regcache, tid, regno); |
45229ea4 | 2138 | else |
56be3814 | 2139 | store_ppc_registers (regcache, tid); |
45229ea4 EZ |
2140 | } |
2141 | ||
f2db237a AM |
2142 | /* Functions for transferring registers between a gregset_t or fpregset_t |
2143 | (see sys/ucontext.h) and gdb's regcache. The word size is that used | |
0df8b418 | 2144 | by the ptrace interface, not the current program's ABI. Eg. if a |
f2db237a AM |
2145 | powerpc64-linux gdb is being used to debug a powerpc32-linux app, we |
2146 | read or write 64-bit gregsets. This is to suit the host libthread_db. */ | |
2147 | ||
50c9bd31 | 2148 | void |
7f7fe91e | 2149 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) |
c877c8e6 | 2150 | { |
f2db237a | 2151 | const struct regset *regset = ppc_linux_gregset (sizeof (long)); |
f9be684a | 2152 | |
f2db237a | 2153 | ppc_supply_gregset (regset, regcache, -1, gregsetp, sizeof (*gregsetp)); |
c877c8e6 KB |
2154 | } |
2155 | ||
fdb28ac4 | 2156 | void |
7f7fe91e UW |
2157 | fill_gregset (const struct regcache *regcache, |
2158 | gdb_gregset_t *gregsetp, int regno) | |
fdb28ac4 | 2159 | { |
f2db237a | 2160 | const struct regset *regset = ppc_linux_gregset (sizeof (long)); |
f9be684a | 2161 | |
f2db237a AM |
2162 | if (regno == -1) |
2163 | memset (gregsetp, 0, sizeof (*gregsetp)); | |
2164 | ppc_collect_gregset (regset, regcache, regno, gregsetp, sizeof (*gregsetp)); | |
fdb28ac4 KB |
2165 | } |
2166 | ||
50c9bd31 | 2167 | void |
7f7fe91e | 2168 | supply_fpregset (struct regcache *regcache, const gdb_fpregset_t * fpregsetp) |
c877c8e6 | 2169 | { |
f2db237a AM |
2170 | const struct regset *regset = ppc_linux_fpregset (); |
2171 | ||
2172 | ppc_supply_fpregset (regset, regcache, -1, | |
2173 | fpregsetp, sizeof (*fpregsetp)); | |
c877c8e6 | 2174 | } |
fdb28ac4 | 2175 | |
fdb28ac4 | 2176 | void |
7f7fe91e UW |
2177 | fill_fpregset (const struct regcache *regcache, |
2178 | gdb_fpregset_t *fpregsetp, int regno) | |
fdb28ac4 | 2179 | { |
f2db237a AM |
2180 | const struct regset *regset = ppc_linux_fpregset (); |
2181 | ||
2182 | ppc_collect_fpregset (regset, regcache, regno, | |
2183 | fpregsetp, sizeof (*fpregsetp)); | |
fdb28ac4 | 2184 | } |
10d6c8cd | 2185 | |
2e077f5e PFC |
2186 | int |
2187 | ppc_linux_nat_target::auxv_parse (gdb_byte **readptr, | |
2188 | gdb_byte *endptr, CORE_ADDR *typep, | |
2189 | CORE_ADDR *valp) | |
409c383c | 2190 | { |
dfd4cc63 | 2191 | int tid = ptid_get_lwp (inferior_ptid); |
409c383c | 2192 | if (tid == 0) |
dfd4cc63 | 2193 | tid = ptid_get_pid (inferior_ptid); |
409c383c | 2194 | |
2e077f5e | 2195 | int sizeof_auxv_field = ppc_linux_target_wordsize (tid); |
409c383c | 2196 | |
f5656ead | 2197 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
409c383c UW |
2198 | gdb_byte *ptr = *readptr; |
2199 | ||
2200 | if (endptr == ptr) | |
2201 | return 0; | |
2202 | ||
2203 | if (endptr - ptr < sizeof_auxv_field * 2) | |
2204 | return -1; | |
2205 | ||
e17a4113 | 2206 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
409c383c | 2207 | ptr += sizeof_auxv_field; |
e17a4113 | 2208 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order); |
409c383c UW |
2209 | ptr += sizeof_auxv_field; |
2210 | ||
2211 | *readptr = ptr; | |
2212 | return 1; | |
2213 | } | |
2214 | ||
f6ac5f3d PA |
2215 | const struct target_desc * |
2216 | ppc_linux_nat_target::read_description () | |
310a98e1 | 2217 | { |
dfd4cc63 | 2218 | int tid = ptid_get_lwp (inferior_ptid); |
7284e1be | 2219 | if (tid == 0) |
dfd4cc63 | 2220 | tid = ptid_get_pid (inferior_ptid); |
7284e1be | 2221 | |
310a98e1 DJ |
2222 | if (have_ptrace_getsetevrregs) |
2223 | { | |
2224 | struct gdb_evrregset_t evrregset; | |
310a98e1 DJ |
2225 | |
2226 | if (ptrace (PTRACE_GETEVRREGS, tid, 0, &evrregset) >= 0) | |
7284e1be UW |
2227 | return tdesc_powerpc_e500l; |
2228 | ||
2229 | /* EIO means that the PTRACE_GETEVRREGS request isn't supported. | |
2230 | Anything else needs to be reported. */ | |
2231 | else if (errno != EIO) | |
2232 | perror_with_name (_("Unable to fetch SPE registers")); | |
2233 | } | |
2234 | ||
bd64614e PFC |
2235 | struct ppc_linux_features features = ppc_linux_no_features; |
2236 | ||
2e077f5e | 2237 | features.wordsize = ppc_linux_target_wordsize (tid); |
bd64614e | 2238 | |
0ec848ad | 2239 | CORE_ADDR hwcap = ppc_linux_get_hwcap (); |
bd64614e | 2240 | |
0154d990 | 2241 | if (have_ptrace_getsetvsxregs |
bd64614e | 2242 | && (hwcap & PPC_FEATURE_HAS_VSX)) |
604c2f83 LM |
2243 | { |
2244 | gdb_vsxregset_t vsxregset; | |
2245 | ||
2246 | if (ptrace (PTRACE_GETVSXREGS, tid, 0, &vsxregset) >= 0) | |
bd64614e | 2247 | features.vsx = true; |
604c2f83 LM |
2248 | |
2249 | /* EIO means that the PTRACE_GETVSXREGS request isn't supported. | |
2250 | Anything else needs to be reported. */ | |
2251 | else if (errno != EIO) | |
2252 | perror_with_name (_("Unable to fetch VSX registers")); | |
2253 | } | |
2254 | ||
0154d990 | 2255 | if (have_ptrace_getvrregs |
bd64614e | 2256 | && (hwcap & PPC_FEATURE_HAS_ALTIVEC)) |
7284e1be UW |
2257 | { |
2258 | gdb_vrregset_t vrregset; | |
2259 | ||
2260 | if (ptrace (PTRACE_GETVRREGS, tid, 0, &vrregset) >= 0) | |
bd64614e | 2261 | features.altivec = true; |
7284e1be UW |
2262 | |
2263 | /* EIO means that the PTRACE_GETVRREGS request isn't supported. | |
2264 | Anything else needs to be reported. */ | |
2265 | else if (errno != EIO) | |
2266 | perror_with_name (_("Unable to fetch AltiVec registers")); | |
310a98e1 DJ |
2267 | } |
2268 | ||
bd64614e PFC |
2269 | if (hwcap & PPC_FEATURE_CELL) |
2270 | features.cell = true; | |
7284e1be | 2271 | |
bd64614e | 2272 | features.isa205 = ppc_linux_has_isa205 (hwcap); |
604c2f83 | 2273 | |
bd64614e | 2274 | return ppc_linux_match_description (features); |
310a98e1 DJ |
2275 | } |
2276 | ||
10d6c8cd DJ |
2277 | void |
2278 | _initialize_ppc_linux_nat (void) | |
2279 | { | |
f6ac5f3d | 2280 | linux_target = &the_ppc_linux_nat_target; |
310a98e1 | 2281 | |
76727919 | 2282 | gdb::observers::thread_exit.attach (ppc_linux_thread_exit); |
6ffbb7ab | 2283 | |
10d6c8cd | 2284 | /* Register the target. */ |
d9f719f1 | 2285 | add_inf_child_target (linux_target); |
10d6c8cd | 2286 | } |