Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 1 | From fef2dfc9c55d19be25262175a4fa4921167a30b7 Mon Sep 17 00:00:00 2001 |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 2 | From: David Holsgrove <david.holsgrove@petalogix.com> |
| 3 | Date: Fri, 20 Jul 2012 15:18:35 +1000 |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 4 | Subject: [PATCH 38/43] Initial support for native gdb |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 5 | |
| 6 | microblaze: Follow PPC method of getting setting registers |
| 7 | using PTRACE PEEK/POKE |
| 8 | |
| 9 | Signed-off-by: David Holsgrove <david.holsgrove@petalogix.com> |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 10 | |
| 11 | Conflicts: |
| 12 | gdb/Makefile.in |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 13 | --- |
| 14 | gdb/Makefile.in | 4 +- |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 15 | gdb/config/microblaze/linux.mh | 9 + |
| 16 | gdb/microblaze-linux-nat.c | 431 +++++++++++++++++++++++++++++++++ |
| 17 | 3 files changed, 443 insertions(+), 1 deletion(-) |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 18 | create mode 100644 gdb/config/microblaze/linux.mh |
| 19 | create mode 100644 gdb/microblaze-linux-nat.c |
| 20 | |
| 21 | diff --git a/gdb/Makefile.in b/gdb/Makefile.in |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 22 | index 5614cc3386..d620580498 100644 |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 23 | --- a/gdb/Makefile.in |
| 24 | +++ b/gdb/Makefile.in |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 25 | @@ -1316,6 +1316,7 @@ HFILES_NO_SRCDIR = \ |
| 26 | memory-map.h \ |
| 27 | memrange.h \ |
| 28 | microblaze-tdep.h \ |
| 29 | + microblaze-linux-tdep.h \ |
| 30 | mips-linux-tdep.h \ |
| 31 | mips-nbsd-tdep.h \ |
| 32 | mips-tdep.h \ |
| 33 | @@ -1349,6 +1350,7 @@ HFILES_NO_SRCDIR = \ |
| 34 | prologue-value.h \ |
| 35 | psympriv.h \ |
| 36 | psymtab.h \ |
| 37 | + ia64-hpux-tdep.h \ |
| 38 | ravenscar-thread.h \ |
| 39 | record.h \ |
| 40 | record-full.h \ |
| 41 | @@ -2263,6 +2265,7 @@ ALLDEPFILES = \ |
| 42 | m68k-tdep.c \ |
| 43 | microblaze-linux-tdep.c \ |
| 44 | microblaze-tdep.c \ |
| 45 | + microblaze-linux-nat.c \ |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 46 | mingw-hdep.c \ |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 47 | mips-fbsd-nat.c \ |
| 48 | mips-fbsd-tdep.c \ |
| 49 | @@ -2365,7 +2368,6 @@ ALLDEPFILES = \ |
| 50 | xtensa-linux-tdep.c \ |
| 51 | xtensa-tdep.c \ |
| 52 | xtensa-xtregs.c \ |
| 53 | - common/mingw-strerror.c \ |
| 54 | common/posix-strerror.c |
| 55 | |
| 56 | # Some files need explicit build rules (due to -Werror problems) or due |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 57 | diff --git a/gdb/config/microblaze/linux.mh b/gdb/config/microblaze/linux.mh |
| 58 | new file mode 100644 |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 59 | index 0000000000..a4eaf540e1 |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 60 | --- /dev/null |
| 61 | +++ b/gdb/config/microblaze/linux.mh |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 62 | @@ -0,0 +1,9 @@ |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 63 | +# Host: Microblaze, running Linux |
| 64 | + |
| 65 | +NAT_FILE= config/nm-linux.h |
| 66 | +NATDEPFILES= inf-ptrace.o fork-child.o \ |
| 67 | + microblaze-linux-nat.o proc-service.o linux-thread-db.o \ |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 68 | + linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 69 | +NAT_CDEPS = $(srcdir)/proc-service.list |
| 70 | + |
| 71 | +LOADLIBES = -ldl $(RDYNAMIC) |
| 72 | diff --git a/gdb/microblaze-linux-nat.c b/gdb/microblaze-linux-nat.c |
| 73 | new file mode 100644 |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 74 | index 0000000000..e9b8c9c522 |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 75 | --- /dev/null |
| 76 | +++ b/gdb/microblaze-linux-nat.c |
| 77 | @@ -0,0 +1,431 @@ |
| 78 | +/* Microblaze GNU/Linux native support. |
| 79 | + |
| 80 | + Copyright (C) 1988-1989, 1991-1992, 1994, 1996, 2000-2012 Free |
| 81 | + Software Foundation, Inc. |
| 82 | + |
| 83 | + This file is part of GDB. |
| 84 | + |
| 85 | + This program is free software; you can redistribute it and/or modify |
| 86 | + it under the terms of the GNU General Public License as published by |
| 87 | + the Free Software Foundation; either version 3 of the License, or |
| 88 | + (at your option) any later version. |
| 89 | + |
| 90 | + This program is distributed in the hope that it will be useful, |
| 91 | + but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 92 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 93 | + GNU General Public License for more details. |
| 94 | + |
| 95 | + You should have received a copy of the GNU General Public License |
| 96 | + along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 97 | + |
| 98 | +#include "defs.h" |
| 99 | +#include "arch-utils.h" |
| 100 | +#include "dis-asm.h" |
| 101 | +#include "frame.h" |
| 102 | +#include "trad-frame.h" |
| 103 | +#include "symtab.h" |
| 104 | +#include "value.h" |
| 105 | +#include "gdbcmd.h" |
| 106 | +#include "breakpoint.h" |
| 107 | +#include "inferior.h" |
| 108 | +#include "regcache.h" |
| 109 | +#include "target.h" |
| 110 | +#include "frame.h" |
| 111 | +#include "frame-base.h" |
| 112 | +#include "frame-unwind.h" |
| 113 | +#include "dwarf2-frame.h" |
| 114 | +#include "osabi.h" |
| 115 | + |
| 116 | +#include "gdb_assert.h" |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 117 | +#include "gdb_string.h" |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 118 | +#include "target-descriptions.h" |
| 119 | +#include "opcodes/microblaze-opcm.h" |
| 120 | +#include "opcodes/microblaze-dis.h" |
| 121 | + |
| 122 | +#include "linux-nat.h" |
| 123 | +#include "target-descriptions.h" |
| 124 | + |
| 125 | +#include <sys/user.h> |
| 126 | +#include <sys/utsname.h> |
| 127 | +#include <sys/procfs.h> |
| 128 | +#include <sys/ptrace.h> |
| 129 | + |
| 130 | +/* Prototypes for supply_gregset etc. */ |
| 131 | +#include "gregset.h" |
| 132 | + |
| 133 | +#include "microblaze-tdep.h" |
| 134 | + |
| 135 | +#include <elf/common.h> |
| 136 | +#include "auxv.h" |
| 137 | + |
| 138 | +/* Defines ps_err_e, struct ps_prochandle. */ |
| 139 | +#include "gdb_proc_service.h" |
| 140 | + |
| 141 | +/* On GNU/Linux, threads are implemented as pseudo-processes, in which |
| 142 | + case we may be tracing more than one process at a time. In that |
| 143 | + case, inferior_ptid will contain the main process ID and the |
| 144 | + individual thread (process) ID. get_thread_id () is used to get |
| 145 | + the thread id if it's available, and the process id otherwise. */ |
| 146 | + |
| 147 | +int |
| 148 | +get_thread_id (ptid_t ptid) |
| 149 | +{ |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 150 | + int tid = TIDGET (ptid); |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 151 | + if (0 == tid) |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 152 | + tid = PIDGET (ptid); |
Brad Bishop | 286d45c | 2018-10-02 15:21:57 -0400 | [diff] [blame] | 153 | + return tid; |
| 154 | +} |
| 155 | + |
| 156 | +#define GET_THREAD_ID(PTID) get_thread_id (PTID) |
| 157 | + |
| 158 | +/* Non-zero if our kernel may support the PTRACE_GETREGS and |
| 159 | + PTRACE_SETREGS requests, for reading and writing the |
| 160 | + general-purpose registers. Zero if we've tried one of |
| 161 | + them and gotten an error. */ |
| 162 | +int have_ptrace_getsetregs = 1; |
| 163 | + |
| 164 | +static int |
| 165 | +microblaze_register_u_addr (struct gdbarch *gdbarch, int regno) |
| 166 | +{ |
| 167 | + int u_addr = -1; |
| 168 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 169 | + /* NOTE: cagney/2003-11-25: This is the word size used by the ptrace |
| 170 | + interface, and not the wordsize of the program's ABI. */ |
| 171 | + int wordsize = sizeof (long); |
| 172 | + |
| 173 | + /* General purpose registers occupy 1 slot each in the buffer. */ |
| 174 | + if (regno >= MICROBLAZE_R0_REGNUM |
| 175 | + && regno <= MICROBLAZE_FSR_REGNUM) |
| 176 | + u_addr = (regno * wordsize); |
| 177 | + |
| 178 | + return u_addr; |
| 179 | +} |
| 180 | + |
| 181 | + |
| 182 | +static void |
| 183 | +fetch_register (struct regcache *regcache, int tid, int regno) |
| 184 | +{ |
| 185 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 186 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 187 | + /* This isn't really an address. But ptrace thinks of it as one. */ |
| 188 | + CORE_ADDR regaddr = microblaze_register_u_addr (gdbarch, regno); |
| 189 | + int bytes_transferred; |
| 190 | + unsigned int offset; /* Offset of registers within the u area. */ |
| 191 | + char buf[MAX_REGISTER_SIZE]; |
| 192 | + |
| 193 | + if (regaddr == -1) |
| 194 | + { |
| 195 | + memset (buf, '\0', register_size (gdbarch, regno)); /* Supply zeroes */ |
| 196 | + regcache_raw_supply (regcache, regno, buf); |
| 197 | + return; |
| 198 | + } |
| 199 | + |
| 200 | + /* Read the raw register using sizeof(long) sized chunks. On a |
| 201 | + 32-bit platform, 64-bit floating-point registers will require two |
| 202 | + transfers. */ |
| 203 | + for (bytes_transferred = 0; |
| 204 | + bytes_transferred < register_size (gdbarch, regno); |
| 205 | + bytes_transferred += sizeof (long)) |
| 206 | + { |
| 207 | + long l; |
| 208 | + |
| 209 | + errno = 0; |
| 210 | + l = ptrace (PTRACE_PEEKUSER, tid, (PTRACE_TYPE_ARG3) regaddr, 0); |
| 211 | + regaddr += sizeof (long); |
| 212 | + if (errno != 0) |
| 213 | + { |
| 214 | + char message[128]; |
| 215 | + sprintf (message, "reading register %s (#%d)", |
| 216 | + gdbarch_register_name (gdbarch, regno), regno); |
| 217 | + perror_with_name (message); |
| 218 | + } |
| 219 | + memcpy (&buf[bytes_transferred], &l, sizeof (l)); |
| 220 | + } |
| 221 | + |
| 222 | + /* Now supply the register. Keep in mind that the regcache's idea |
| 223 | + of the register's size may not be a multiple of sizeof |
| 224 | + (long). */ |
| 225 | + if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 226 | + { |
| 227 | + /* Little-endian values are always found at the left end of the |
| 228 | + bytes transferred. */ |
| 229 | + regcache_raw_supply (regcache, regno, buf); |
| 230 | + } |
| 231 | + else if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 232 | + { |
| 233 | + /* Big-endian values are found at the right end of the bytes |
| 234 | + transferred. */ |
| 235 | + size_t padding = (bytes_transferred - register_size (gdbarch, regno)); |
| 236 | + regcache_raw_supply (regcache, regno, buf + padding); |
| 237 | + } |
| 238 | + else |
| 239 | + internal_error (__FILE__, __LINE__, |
| 240 | + _("fetch_register: unexpected byte order: %d"), |
| 241 | + gdbarch_byte_order (gdbarch)); |
| 242 | +} |
| 243 | + |
| 244 | +/* This function actually issues the request to ptrace, telling |
| 245 | + it to get all general-purpose registers and put them into the |
| 246 | + specified regset. |
| 247 | + |
| 248 | + If the ptrace request does not exist, this function returns 0 |
| 249 | + and properly sets the have_ptrace_* flag. If the request fails, |
| 250 | + this function calls perror_with_name. Otherwise, if the request |
| 251 | + succeeds, then the regcache gets filled and 1 is returned. */ |
| 252 | +static int |
| 253 | +fetch_all_gp_regs (struct regcache *regcache, int tid) |
| 254 | +{ |
| 255 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 256 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 257 | + gdb_gregset_t gregset; |
| 258 | + |
| 259 | + if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0) |
| 260 | + { |
| 261 | + if (errno == EIO) |
| 262 | + { |
| 263 | + have_ptrace_getsetregs = 0; |
| 264 | + return 0; |
| 265 | + } |
| 266 | + perror_with_name (_("Couldn't get general-purpose registers.")); |
| 267 | + } |
| 268 | + |
| 269 | + supply_gregset (regcache, (const gdb_gregset_t *) &gregset); |
| 270 | + |
| 271 | + return 1; |
| 272 | +} |
| 273 | + |
| 274 | + |
| 275 | +/* This is a wrapper for the fetch_all_gp_regs function. It is |
| 276 | + responsible for verifying if this target has the ptrace request |
| 277 | + that can be used to fetch all general-purpose registers at one |
| 278 | + shot. If it doesn't, then we should fetch them using the |
| 279 | + old-fashioned way, which is to iterate over the registers and |
| 280 | + request them one by one. */ |
| 281 | +static void |
| 282 | +fetch_gp_regs (struct regcache *regcache, int tid) |
| 283 | +{ |
| 284 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 285 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 286 | + int i; |
| 287 | + |
| 288 | + if (have_ptrace_getsetregs) |
| 289 | + if (fetch_all_gp_regs (regcache, tid)) |
| 290 | + return; |
| 291 | + |
| 292 | + /* If we've hit this point, it doesn't really matter which |
| 293 | + architecture we are using. We just need to read the |
| 294 | + registers in the "old-fashioned way". */ |
| 295 | + for (i = MICROBLAZE_R0_REGNUM; i <= MICROBLAZE_FSR_REGNUM; i++) |
| 296 | + fetch_register (regcache, tid, i); |
| 297 | +} |
| 298 | + |
| 299 | + |
| 300 | +static void |
| 301 | +store_register (const struct regcache *regcache, int tid, int regno) |
| 302 | +{ |
| 303 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 304 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 305 | + /* This isn't really an address. But ptrace thinks of it as one. */ |
| 306 | + CORE_ADDR regaddr = microblaze_register_u_addr (gdbarch, regno); |
| 307 | + int i; |
| 308 | + size_t bytes_to_transfer; |
| 309 | + char buf[MAX_REGISTER_SIZE]; |
| 310 | + |
| 311 | + if (regaddr == -1) |
| 312 | + return; |
| 313 | + |
| 314 | + /* First collect the register. Keep in mind that the regcache's |
| 315 | + idea of the register's size may not be a multiple of sizeof |
| 316 | + (long). */ |
| 317 | + memset (buf, 0, sizeof buf); |
| 318 | + bytes_to_transfer = align_up (register_size (gdbarch, regno), sizeof (long)); |
| 319 | + if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 320 | + { |
| 321 | + /* Little-endian values always sit at the left end of the buffer. */ |
| 322 | + regcache_raw_collect (regcache, regno, buf); |
| 323 | + } |
| 324 | + else if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 325 | + { |
| 326 | + /* Big-endian values sit at the right end of the buffer. */ |
| 327 | + size_t padding = (bytes_to_transfer - register_size (gdbarch, regno)); |
| 328 | + regcache_raw_collect (regcache, regno, buf + padding); |
| 329 | + } |
| 330 | + |
| 331 | + for (i = 0; i < bytes_to_transfer; i += sizeof (long)) |
| 332 | + { |
| 333 | + long l; |
| 334 | + |
| 335 | + memcpy (&l, &buf[i], sizeof (l)); |
| 336 | + errno = 0; |
| 337 | + ptrace (PTRACE_POKEUSER, tid, (PTRACE_TYPE_ARG3) regaddr, l); |
| 338 | + regaddr += sizeof (long); |
| 339 | + |
| 340 | + if (errno != 0) |
| 341 | + { |
| 342 | + char message[128]; |
| 343 | + sprintf (message, "writing register %s (#%d)", |
| 344 | + gdbarch_register_name (gdbarch, regno), regno); |
| 345 | + perror_with_name (message); |
| 346 | + } |
| 347 | + } |
| 348 | +} |
| 349 | + |
| 350 | +/* This function actually issues the request to ptrace, telling |
| 351 | + it to store all general-purpose registers present in the specified |
| 352 | + regset. |
| 353 | + |
| 354 | + If the ptrace request does not exist, this function returns 0 |
| 355 | + and properly sets the have_ptrace_* flag. If the request fails, |
| 356 | + this function calls perror_with_name. Otherwise, if the request |
| 357 | + succeeds, then the regcache is stored and 1 is returned. */ |
| 358 | +static int |
| 359 | +store_all_gp_regs (const struct regcache *regcache, int tid, int regno) |
| 360 | +{ |
| 361 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 362 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 363 | + gdb_gregset_t gregset; |
| 364 | + |
| 365 | + if (ptrace (PTRACE_GETREGS, tid, 0, (void *) &gregset) < 0) |
| 366 | + { |
| 367 | + if (errno == EIO) |
| 368 | + { |
| 369 | + have_ptrace_getsetregs = 0; |
| 370 | + return 0; |
| 371 | + } |
| 372 | + perror_with_name (_("Couldn't get general-purpose registers.")); |
| 373 | + } |
| 374 | + |
| 375 | + fill_gregset (regcache, &gregset, regno); |
| 376 | + |
| 377 | + if (ptrace (PTRACE_SETREGS, tid, 0, (void *) &gregset) < 0) |
| 378 | + { |
| 379 | + if (errno == EIO) |
| 380 | + { |
| 381 | + have_ptrace_getsetregs = 0; |
| 382 | + return 0; |
| 383 | + } |
| 384 | + perror_with_name (_("Couldn't set general-purpose registers.")); |
| 385 | + } |
| 386 | + |
| 387 | + return 1; |
| 388 | +} |
| 389 | + |
| 390 | +/* This is a wrapper for the store_all_gp_regs function. It is |
| 391 | + responsible for verifying if this target has the ptrace request |
| 392 | + that can be used to store all general-purpose registers at one |
| 393 | + shot. If it doesn't, then we should store them using the |
| 394 | + old-fashioned way, which is to iterate over the registers and |
| 395 | + store them one by one. */ |
| 396 | +static void |
| 397 | +store_gp_regs (const struct regcache *regcache, int tid, int regno) |
| 398 | +{ |
| 399 | + struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 400 | + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 401 | + int i; |
| 402 | + |
| 403 | + if (have_ptrace_getsetregs) |
| 404 | + if (store_all_gp_regs (regcache, tid, regno)) |
| 405 | + return; |
| 406 | + |
| 407 | + /* If we hit this point, it doesn't really matter which |
| 408 | + architecture we are using. We just need to store the |
| 409 | + registers in the "old-fashioned way". */ |
| 410 | + for (i = MICROBLAZE_R0_REGNUM; i <= MICROBLAZE_FSR_REGNUM; i++) |
| 411 | + store_register (regcache, tid, i); |
| 412 | +} |
| 413 | + |
| 414 | + |
| 415 | +/* Fetch registers from the child process. Fetch all registers if |
| 416 | + regno == -1, otherwise fetch all general registers or all floating |
| 417 | + point registers depending upon the value of regno. */ |
| 418 | + |
| 419 | +static void |
| 420 | +microblaze_linux_fetch_inferior_registers (struct target_ops *ops, |
| 421 | + struct regcache *regcache, int regno) |
| 422 | +{ |
| 423 | + /* Get the thread id for the ptrace call. */ |
| 424 | + int tid = GET_THREAD_ID (inferior_ptid); |
| 425 | + |
| 426 | + if (regno == -1) |
| 427 | + fetch_gp_regs (regcache, tid); |
| 428 | + else |
| 429 | + fetch_register (regcache, tid, regno); |
| 430 | +} |
| 431 | + |
| 432 | +/* Store registers back into the inferior. Store all registers if |
| 433 | + regno == -1, otherwise store all general registers or all floating |
| 434 | + point registers depending upon the value of regno. */ |
| 435 | + |
| 436 | +static void |
| 437 | +microblaze_linux_store_inferior_registers (struct target_ops *ops, |
| 438 | + struct regcache *regcache, int regno) |
| 439 | +{ |
| 440 | + /* Get the thread id for the ptrace call. */ |
| 441 | + int tid = GET_THREAD_ID (inferior_ptid); |
| 442 | + |
| 443 | + if (regno >= 0) |
| 444 | + store_register (regcache, tid, regno); |
| 445 | + else |
| 446 | + store_gp_regs (regcache, tid, -1); |
| 447 | +} |
| 448 | + |
| 449 | +/* Wrapper functions for the standard regset handling, used by |
| 450 | + thread debugging. */ |
| 451 | + |
| 452 | +void |
| 453 | +fill_gregset (const struct regcache *regcache, |
| 454 | + gdb_gregset_t *gregsetp, int regno) |
| 455 | +{ |
| 456 | + microblaze_collect_gregset (NULL, regcache, regno, gregsetp); |
| 457 | +} |
| 458 | + |
| 459 | +void |
| 460 | +supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) |
| 461 | +{ |
| 462 | + microblaze_supply_gregset (NULL, regcache, -1, gregsetp); |
| 463 | +} |
| 464 | + |
| 465 | +void |
| 466 | +fill_fpregset (const struct regcache *regcache, |
| 467 | + gdb_fpregset_t *fpregsetp, int regno) |
| 468 | +{ |
| 469 | + /* FIXME. */ |
| 470 | +} |
| 471 | + |
| 472 | +void |
| 473 | +supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) |
| 474 | +{ |
| 475 | + /* FIXME. */ |
| 476 | +} |
| 477 | + |
| 478 | +static const struct target_desc * |
| 479 | +microblaze_linux_read_description (struct target_ops *ops) |
| 480 | +{ |
| 481 | + CORE_ADDR microblaze_hwcap = 0; |
| 482 | + |
| 483 | + if (target_auxv_search (ops, AT_HWCAP, µblaze_hwcap) != 1) |
| 484 | + return NULL; |
| 485 | + |
| 486 | + return NULL; |
| 487 | +} |
| 488 | + |
| 489 | + |
| 490 | +void _initialize_microblaze_linux_nat (void); |
| 491 | + |
| 492 | +void |
| 493 | +_initialize_microblaze_linux_nat (void) |
| 494 | +{ |
| 495 | + struct target_ops *t; |
| 496 | + |
| 497 | + /* Fill in the generic GNU/Linux methods. */ |
| 498 | + t = linux_target (); |
| 499 | + |
| 500 | + /* Add our register access methods. */ |
| 501 | + t->to_fetch_registers = microblaze_linux_fetch_inferior_registers; |
| 502 | + t->to_store_registers = microblaze_linux_store_inferior_registers; |
| 503 | + |
| 504 | + t->to_read_description = microblaze_linux_read_description; |
| 505 | + |
| 506 | + /* Register the target. */ |
| 507 | + linux_nat_add_target (t); |
| 508 | +} |
| 509 | -- |
Andrew Geissler | 84ad7c5 | 2020-06-27 00:00:16 -0500 | [diff] [blame^] | 510 | 2.17.1 |
| 511 | |