| 1 | /* Target-dependent code for UltraSPARC. |
| 2 | |
| 3 | Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "arch-utils.h" |
| 23 | #include "dwarf2-frame.h" |
| 24 | #include "floatformat.h" |
| 25 | #include "frame.h" |
| 26 | #include "frame-base.h" |
| 27 | #include "frame-unwind.h" |
| 28 | #include "gdbcore.h" |
| 29 | #include "gdbtypes.h" |
| 30 | #include "inferior.h" |
| 31 | #include "symtab.h" |
| 32 | #include "objfiles.h" |
| 33 | #include "osabi.h" |
| 34 | #include "regcache.h" |
| 35 | #include "target.h" |
| 36 | #include "value.h" |
| 37 | |
| 38 | #include "gdb_assert.h" |
| 39 | #include "gdb_string.h" |
| 40 | |
| 41 | #include "sparc64-tdep.h" |
| 42 | |
| 43 | /* This file implements the The SPARC 64-bit ABI as defined by the |
| 44 | section "Low-Level System Information" of the SPARC Compliance |
| 45 | Definition (SCD) 2.4.1, which is the 64-bit System V psABI for |
| 46 | SPARC. */ |
| 47 | |
| 48 | /* Please use the sparc32_-prefix for 32-bit specific code, the |
| 49 | sparc64_-prefix for 64-bit specific code and the sparc_-prefix for |
| 50 | code can handle both. */ |
| 51 | \f |
| 52 | /* The functions on this page are intended to be used to classify |
| 53 | function arguments. */ |
| 54 | |
| 55 | /* Check whether TYPE is "Integral or Pointer". */ |
| 56 | |
| 57 | static int |
| 58 | sparc64_integral_or_pointer_p (const struct type *type) |
| 59 | { |
| 60 | switch (TYPE_CODE (type)) |
| 61 | { |
| 62 | case TYPE_CODE_INT: |
| 63 | case TYPE_CODE_BOOL: |
| 64 | case TYPE_CODE_CHAR: |
| 65 | case TYPE_CODE_ENUM: |
| 66 | case TYPE_CODE_RANGE: |
| 67 | { |
| 68 | int len = TYPE_LENGTH (type); |
| 69 | gdb_assert (len == 1 || len == 2 || len == 4 || len == 8); |
| 70 | } |
| 71 | return 1; |
| 72 | case TYPE_CODE_PTR: |
| 73 | case TYPE_CODE_REF: |
| 74 | { |
| 75 | int len = TYPE_LENGTH (type); |
| 76 | gdb_assert (len == 8); |
| 77 | } |
| 78 | return 1; |
| 79 | default: |
| 80 | break; |
| 81 | } |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | /* Check whether TYPE is "Floating". */ |
| 87 | |
| 88 | static int |
| 89 | sparc64_floating_p (const struct type *type) |
| 90 | { |
| 91 | switch (TYPE_CODE (type)) |
| 92 | { |
| 93 | case TYPE_CODE_FLT: |
| 94 | { |
| 95 | int len = TYPE_LENGTH (type); |
| 96 | gdb_assert (len == 4 || len == 8 || len == 16); |
| 97 | } |
| 98 | return 1; |
| 99 | default: |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /* Check whether TYPE is "Structure or Union". */ |
| 107 | |
| 108 | static int |
| 109 | sparc64_structure_or_union_p (const struct type *type) |
| 110 | { |
| 111 | switch (TYPE_CODE (type)) |
| 112 | { |
| 113 | case TYPE_CODE_STRUCT: |
| 114 | case TYPE_CODE_UNION: |
| 115 | return 1; |
| 116 | default: |
| 117 | break; |
| 118 | } |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | \f |
| 123 | |
| 124 | /* Type for %pstate. */ |
| 125 | struct type *sparc64_pstate_type; |
| 126 | |
| 127 | /* Type for %fsr. */ |
| 128 | struct type *sparc64_fsr_type; |
| 129 | |
| 130 | /* Type for %fprs. */ |
| 131 | struct type *sparc64_fprs_type; |
| 132 | |
| 133 | /* Construct types for ISA-specific registers. */ |
| 134 | |
| 135 | static void |
| 136 | sparc64_init_types (void) |
| 137 | { |
| 138 | struct type *type; |
| 139 | |
| 140 | type = init_flags_type ("builtin_type_sparc64_pstate", 8); |
| 141 | append_flags_type_flag (type, 0, "AG"); |
| 142 | append_flags_type_flag (type, 1, "IE"); |
| 143 | append_flags_type_flag (type, 2, "PRIV"); |
| 144 | append_flags_type_flag (type, 3, "AM"); |
| 145 | append_flags_type_flag (type, 4, "PEF"); |
| 146 | append_flags_type_flag (type, 5, "RED"); |
| 147 | append_flags_type_flag (type, 8, "TLE"); |
| 148 | append_flags_type_flag (type, 9, "CLE"); |
| 149 | append_flags_type_flag (type, 10, "PID0"); |
| 150 | append_flags_type_flag (type, 11, "PID1"); |
| 151 | sparc64_pstate_type = type; |
| 152 | |
| 153 | type = init_flags_type ("builtin_type_sparc64_fsr", 8); |
| 154 | append_flags_type_flag (type, 0, "NXA"); |
| 155 | append_flags_type_flag (type, 1, "DZA"); |
| 156 | append_flags_type_flag (type, 2, "UFA"); |
| 157 | append_flags_type_flag (type, 3, "OFA"); |
| 158 | append_flags_type_flag (type, 4, "NVA"); |
| 159 | append_flags_type_flag (type, 5, "NXC"); |
| 160 | append_flags_type_flag (type, 6, "DZC"); |
| 161 | append_flags_type_flag (type, 7, "UFC"); |
| 162 | append_flags_type_flag (type, 8, "OFC"); |
| 163 | append_flags_type_flag (type, 9, "NVC"); |
| 164 | append_flags_type_flag (type, 22, "NS"); |
| 165 | append_flags_type_flag (type, 23, "NXM"); |
| 166 | append_flags_type_flag (type, 24, "DZM"); |
| 167 | append_flags_type_flag (type, 25, "UFM"); |
| 168 | append_flags_type_flag (type, 26, "OFM"); |
| 169 | append_flags_type_flag (type, 27, "NVM"); |
| 170 | sparc64_fsr_type = type; |
| 171 | |
| 172 | type = init_flags_type ("builtin_type_sparc64_fprs", 8); |
| 173 | append_flags_type_flag (type, 0, "DL"); |
| 174 | append_flags_type_flag (type, 1, "DU"); |
| 175 | append_flags_type_flag (type, 2, "FEF"); |
| 176 | sparc64_fprs_type = type; |
| 177 | } |
| 178 | |
| 179 | /* Register information. */ |
| 180 | |
| 181 | static const char *sparc64_register_names[] = |
| 182 | { |
| 183 | "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", |
| 184 | "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", |
| 185 | "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", |
| 186 | "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", |
| 187 | |
| 188 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", |
| 189 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", |
| 190 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", |
| 191 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", |
| 192 | "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", |
| 193 | "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", |
| 194 | |
| 195 | "pc", "npc", |
| 196 | |
| 197 | /* FIXME: Give "state" a name until we start using register groups. */ |
| 198 | "state", |
| 199 | "fsr", |
| 200 | "fprs", |
| 201 | "y", |
| 202 | }; |
| 203 | |
| 204 | /* Total number of registers. */ |
| 205 | #define SPARC64_NUM_REGS ARRAY_SIZE (sparc64_register_names) |
| 206 | |
| 207 | /* We provide the aliases %d0..%d62 and %q0..%q60 for the floating |
| 208 | registers as "psuedo" registers. */ |
| 209 | |
| 210 | static const char *sparc64_pseudo_register_names[] = |
| 211 | { |
| 212 | "cwp", "pstate", "asi", "ccr", |
| 213 | |
| 214 | "d0", "d2", "d4", "d6", "d8", "d10", "d12", "d14", |
| 215 | "d16", "d18", "d20", "d22", "d24", "d26", "d28", "d30", |
| 216 | "d32", "d34", "d36", "d38", "d40", "d42", "d44", "d46", |
| 217 | "d48", "d50", "d52", "d54", "d56", "d58", "d60", "d62", |
| 218 | |
| 219 | "q0", "q4", "q8", "q12", "q16", "q20", "q24", "q28", |
| 220 | "q32", "q36", "q40", "q44", "q48", "q52", "q56", "q60", |
| 221 | }; |
| 222 | |
| 223 | /* Total number of pseudo registers. */ |
| 224 | #define SPARC64_NUM_PSEUDO_REGS ARRAY_SIZE (sparc64_pseudo_register_names) |
| 225 | |
| 226 | /* Return the name of register REGNUM. */ |
| 227 | |
| 228 | static const char * |
| 229 | sparc64_register_name (struct gdbarch *gdbarch, int regnum) |
| 230 | { |
| 231 | if (regnum >= 0 && regnum < SPARC64_NUM_REGS) |
| 232 | return sparc64_register_names[regnum]; |
| 233 | |
| 234 | if (regnum >= SPARC64_NUM_REGS |
| 235 | && regnum < SPARC64_NUM_REGS + SPARC64_NUM_PSEUDO_REGS) |
| 236 | return sparc64_pseudo_register_names[regnum - SPARC64_NUM_REGS]; |
| 237 | |
| 238 | return NULL; |
| 239 | } |
| 240 | |
| 241 | /* Return the GDB type object for the "standard" data type of data in |
| 242 | register REGNUM. */ |
| 243 | |
| 244 | static struct type * |
| 245 | sparc64_register_type (struct gdbarch *gdbarch, int regnum) |
| 246 | { |
| 247 | /* Raw registers. */ |
| 248 | |
| 249 | if (regnum == SPARC_SP_REGNUM || regnum == SPARC_FP_REGNUM) |
| 250 | return builtin_type_void_data_ptr; |
| 251 | if (regnum >= SPARC_G0_REGNUM && regnum <= SPARC_I7_REGNUM) |
| 252 | return builtin_type_int64; |
| 253 | if (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) |
| 254 | return builtin_type_float; |
| 255 | if (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM) |
| 256 | return builtin_type_double; |
| 257 | if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM) |
| 258 | return builtin_type_void_func_ptr; |
| 259 | /* This raw register contains the contents of %cwp, %pstate, %asi |
| 260 | and %ccr as laid out in a %tstate register. */ |
| 261 | if (regnum == SPARC64_STATE_REGNUM) |
| 262 | return builtin_type_int64; |
| 263 | if (regnum == SPARC64_FSR_REGNUM) |
| 264 | return sparc64_fsr_type; |
| 265 | if (regnum == SPARC64_FPRS_REGNUM) |
| 266 | return sparc64_fprs_type; |
| 267 | /* "Although Y is a 64-bit register, its high-order 32 bits are |
| 268 | reserved and always read as 0." */ |
| 269 | if (regnum == SPARC64_Y_REGNUM) |
| 270 | return builtin_type_int64; |
| 271 | |
| 272 | /* Pseudo registers. */ |
| 273 | |
| 274 | if (regnum == SPARC64_CWP_REGNUM) |
| 275 | return builtin_type_int64; |
| 276 | if (regnum == SPARC64_PSTATE_REGNUM) |
| 277 | return sparc64_pstate_type; |
| 278 | if (regnum == SPARC64_ASI_REGNUM) |
| 279 | return builtin_type_int64; |
| 280 | if (regnum == SPARC64_CCR_REGNUM) |
| 281 | return builtin_type_int64; |
| 282 | if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D62_REGNUM) |
| 283 | return builtin_type_double; |
| 284 | if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q60_REGNUM) |
| 285 | return builtin_type_long_double; |
| 286 | |
| 287 | internal_error (__FILE__, __LINE__, _("invalid regnum")); |
| 288 | } |
| 289 | |
| 290 | static void |
| 291 | sparc64_pseudo_register_read (struct gdbarch *gdbarch, |
| 292 | struct regcache *regcache, |
| 293 | int regnum, gdb_byte *buf) |
| 294 | { |
| 295 | gdb_assert (regnum >= SPARC64_NUM_REGS); |
| 296 | |
| 297 | if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D30_REGNUM) |
| 298 | { |
| 299 | regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC64_D0_REGNUM); |
| 300 | regcache_raw_read (regcache, regnum, buf); |
| 301 | regcache_raw_read (regcache, regnum + 1, buf + 4); |
| 302 | } |
| 303 | else if (regnum >= SPARC64_D32_REGNUM && regnum <= SPARC64_D62_REGNUM) |
| 304 | { |
| 305 | regnum = SPARC64_F32_REGNUM + (regnum - SPARC64_D32_REGNUM); |
| 306 | regcache_raw_read (regcache, regnum, buf); |
| 307 | } |
| 308 | else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q28_REGNUM) |
| 309 | { |
| 310 | regnum = SPARC_F0_REGNUM + 4 * (regnum - SPARC64_Q0_REGNUM); |
| 311 | regcache_raw_read (regcache, regnum, buf); |
| 312 | regcache_raw_read (regcache, regnum + 1, buf + 4); |
| 313 | regcache_raw_read (regcache, regnum + 2, buf + 8); |
| 314 | regcache_raw_read (regcache, regnum + 3, buf + 12); |
| 315 | } |
| 316 | else if (regnum >= SPARC64_Q32_REGNUM && regnum <= SPARC64_Q60_REGNUM) |
| 317 | { |
| 318 | regnum = SPARC64_F32_REGNUM + 2 * (regnum - SPARC64_Q32_REGNUM); |
| 319 | regcache_raw_read (regcache, regnum, buf); |
| 320 | regcache_raw_read (regcache, regnum + 1, buf + 8); |
| 321 | } |
| 322 | else if (regnum == SPARC64_CWP_REGNUM |
| 323 | || regnum == SPARC64_PSTATE_REGNUM |
| 324 | || regnum == SPARC64_ASI_REGNUM |
| 325 | || regnum == SPARC64_CCR_REGNUM) |
| 326 | { |
| 327 | ULONGEST state; |
| 328 | |
| 329 | regcache_raw_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state); |
| 330 | switch (regnum) |
| 331 | { |
| 332 | case SPARC64_CWP_REGNUM: |
| 333 | state = (state >> 0) & ((1 << 5) - 1); |
| 334 | break; |
| 335 | case SPARC64_PSTATE_REGNUM: |
| 336 | state = (state >> 8) & ((1 << 12) - 1); |
| 337 | break; |
| 338 | case SPARC64_ASI_REGNUM: |
| 339 | state = (state >> 24) & ((1 << 8) - 1); |
| 340 | break; |
| 341 | case SPARC64_CCR_REGNUM: |
| 342 | state = (state >> 32) & ((1 << 8) - 1); |
| 343 | break; |
| 344 | } |
| 345 | store_unsigned_integer (buf, 8, state); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | static void |
| 350 | sparc64_pseudo_register_write (struct gdbarch *gdbarch, |
| 351 | struct regcache *regcache, |
| 352 | int regnum, const gdb_byte *buf) |
| 353 | { |
| 354 | gdb_assert (regnum >= SPARC64_NUM_REGS); |
| 355 | |
| 356 | if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D30_REGNUM) |
| 357 | { |
| 358 | regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC64_D0_REGNUM); |
| 359 | regcache_raw_write (regcache, regnum, buf); |
| 360 | regcache_raw_write (regcache, regnum + 1, buf + 4); |
| 361 | } |
| 362 | else if (regnum >= SPARC64_D32_REGNUM && regnum <= SPARC64_D62_REGNUM) |
| 363 | { |
| 364 | regnum = SPARC64_F32_REGNUM + (regnum - SPARC64_D32_REGNUM); |
| 365 | regcache_raw_write (regcache, regnum, buf); |
| 366 | } |
| 367 | else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q28_REGNUM) |
| 368 | { |
| 369 | regnum = SPARC_F0_REGNUM + 4 * (regnum - SPARC64_Q0_REGNUM); |
| 370 | regcache_raw_write (regcache, regnum, buf); |
| 371 | regcache_raw_write (regcache, regnum + 1, buf + 4); |
| 372 | regcache_raw_write (regcache, regnum + 2, buf + 8); |
| 373 | regcache_raw_write (regcache, regnum + 3, buf + 12); |
| 374 | } |
| 375 | else if (regnum >= SPARC64_Q32_REGNUM && regnum <= SPARC64_Q60_REGNUM) |
| 376 | { |
| 377 | regnum = SPARC64_F32_REGNUM + 2 * (regnum - SPARC64_Q32_REGNUM); |
| 378 | regcache_raw_write (regcache, regnum, buf); |
| 379 | regcache_raw_write (regcache, regnum + 1, buf + 8); |
| 380 | } |
| 381 | else if (regnum == SPARC64_CWP_REGNUM |
| 382 | || regnum == SPARC64_PSTATE_REGNUM |
| 383 | || regnum == SPARC64_ASI_REGNUM |
| 384 | || regnum == SPARC64_CCR_REGNUM) |
| 385 | { |
| 386 | ULONGEST state, bits; |
| 387 | |
| 388 | regcache_raw_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state); |
| 389 | bits = extract_unsigned_integer (buf, 8); |
| 390 | switch (regnum) |
| 391 | { |
| 392 | case SPARC64_CWP_REGNUM: |
| 393 | state |= ((bits & ((1 << 5) - 1)) << 0); |
| 394 | break; |
| 395 | case SPARC64_PSTATE_REGNUM: |
| 396 | state |= ((bits & ((1 << 12) - 1)) << 8); |
| 397 | break; |
| 398 | case SPARC64_ASI_REGNUM: |
| 399 | state |= ((bits & ((1 << 8) - 1)) << 24); |
| 400 | break; |
| 401 | case SPARC64_CCR_REGNUM: |
| 402 | state |= ((bits & ((1 << 8) - 1)) << 32); |
| 403 | break; |
| 404 | } |
| 405 | regcache_raw_write_unsigned (regcache, SPARC64_STATE_REGNUM, state); |
| 406 | } |
| 407 | } |
| 408 | \f |
| 409 | |
| 410 | /* Return PC of first real instruction of the function starting at |
| 411 | START_PC. */ |
| 412 | |
| 413 | static CORE_ADDR |
| 414 | sparc64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc) |
| 415 | { |
| 416 | struct symtab_and_line sal; |
| 417 | CORE_ADDR func_start, func_end; |
| 418 | struct sparc_frame_cache cache; |
| 419 | |
| 420 | /* This is the preferred method, find the end of the prologue by |
| 421 | using the debugging information. */ |
| 422 | if (find_pc_partial_function (start_pc, NULL, &func_start, &func_end)) |
| 423 | { |
| 424 | sal = find_pc_line (func_start, 0); |
| 425 | |
| 426 | if (sal.end < func_end |
| 427 | && start_pc <= sal.end) |
| 428 | return sal.end; |
| 429 | } |
| 430 | |
| 431 | return sparc_analyze_prologue (gdbarch, start_pc, 0xffffffffffffffffULL, |
| 432 | &cache); |
| 433 | } |
| 434 | |
| 435 | /* Normal frames. */ |
| 436 | |
| 437 | static struct sparc_frame_cache * |
| 438 | sparc64_frame_cache (struct frame_info *next_frame, void **this_cache) |
| 439 | { |
| 440 | return sparc_frame_cache (next_frame, this_cache); |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | sparc64_frame_this_id (struct frame_info *next_frame, void **this_cache, |
| 445 | struct frame_id *this_id) |
| 446 | { |
| 447 | struct sparc_frame_cache *cache = |
| 448 | sparc64_frame_cache (next_frame, this_cache); |
| 449 | |
| 450 | /* This marks the outermost frame. */ |
| 451 | if (cache->base == 0) |
| 452 | return; |
| 453 | |
| 454 | (*this_id) = frame_id_build (cache->base, cache->pc); |
| 455 | } |
| 456 | |
| 457 | static void |
| 458 | sparc64_frame_prev_register (struct frame_info *next_frame, void **this_cache, |
| 459 | int regnum, int *optimizedp, |
| 460 | enum lval_type *lvalp, CORE_ADDR *addrp, |
| 461 | int *realnump, gdb_byte *valuep) |
| 462 | { |
| 463 | struct sparc_frame_cache *cache = |
| 464 | sparc64_frame_cache (next_frame, this_cache); |
| 465 | |
| 466 | if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM) |
| 467 | { |
| 468 | *optimizedp = 0; |
| 469 | *lvalp = not_lval; |
| 470 | *addrp = 0; |
| 471 | *realnump = -1; |
| 472 | if (valuep) |
| 473 | { |
| 474 | CORE_ADDR pc = (regnum == SPARC64_NPC_REGNUM) ? 4 : 0; |
| 475 | |
| 476 | regnum = cache->frameless_p ? SPARC_O7_REGNUM : SPARC_I7_REGNUM; |
| 477 | pc += frame_unwind_register_unsigned (next_frame, regnum) + 8; |
| 478 | store_unsigned_integer (valuep, 8, pc); |
| 479 | } |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | /* Handle StackGhost. */ |
| 484 | { |
| 485 | ULONGEST wcookie = sparc_fetch_wcookie (); |
| 486 | |
| 487 | if (wcookie != 0 && !cache->frameless_p && regnum == SPARC_I7_REGNUM) |
| 488 | { |
| 489 | *optimizedp = 0; |
| 490 | *lvalp = not_lval; |
| 491 | *addrp = 0; |
| 492 | *realnump = -1; |
| 493 | if (valuep) |
| 494 | { |
| 495 | CORE_ADDR addr = cache->base + (regnum - SPARC_L0_REGNUM) * 8; |
| 496 | ULONGEST i7; |
| 497 | |
| 498 | /* Read the value in from memory. */ |
| 499 | i7 = get_frame_memory_unsigned (next_frame, addr, 8); |
| 500 | store_unsigned_integer (valuep, 8, i7 ^ wcookie); |
| 501 | } |
| 502 | return; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | /* The previous frame's `local' and `in' registers have been saved |
| 507 | in the register save area. */ |
| 508 | if (!cache->frameless_p |
| 509 | && regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) |
| 510 | { |
| 511 | *optimizedp = 0; |
| 512 | *lvalp = lval_memory; |
| 513 | *addrp = cache->base + (regnum - SPARC_L0_REGNUM) * 8; |
| 514 | *realnump = -1; |
| 515 | if (valuep) |
| 516 | { |
| 517 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
| 518 | |
| 519 | /* Read the value in from memory. */ |
| 520 | read_memory (*addrp, valuep, register_size (gdbarch, regnum)); |
| 521 | } |
| 522 | return; |
| 523 | } |
| 524 | |
| 525 | /* The previous frame's `out' registers are accessable as the |
| 526 | current frame's `in' registers. */ |
| 527 | if (!cache->frameless_p |
| 528 | && regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) |
| 529 | regnum += (SPARC_I0_REGNUM - SPARC_O0_REGNUM); |
| 530 | |
| 531 | *optimizedp = 0; |
| 532 | *lvalp = lval_register; |
| 533 | *addrp = 0; |
| 534 | *realnump = regnum; |
| 535 | if (valuep) |
| 536 | frame_unwind_register (next_frame, regnum, valuep); |
| 537 | } |
| 538 | |
| 539 | static const struct frame_unwind sparc64_frame_unwind = |
| 540 | { |
| 541 | NORMAL_FRAME, |
| 542 | sparc64_frame_this_id, |
| 543 | sparc64_frame_prev_register |
| 544 | }; |
| 545 | |
| 546 | static const struct frame_unwind * |
| 547 | sparc64_frame_sniffer (struct frame_info *next_frame) |
| 548 | { |
| 549 | return &sparc64_frame_unwind; |
| 550 | } |
| 551 | \f |
| 552 | |
| 553 | static CORE_ADDR |
| 554 | sparc64_frame_base_address (struct frame_info *next_frame, void **this_cache) |
| 555 | { |
| 556 | struct sparc_frame_cache *cache = |
| 557 | sparc64_frame_cache (next_frame, this_cache); |
| 558 | |
| 559 | return cache->base; |
| 560 | } |
| 561 | |
| 562 | static const struct frame_base sparc64_frame_base = |
| 563 | { |
| 564 | &sparc64_frame_unwind, |
| 565 | sparc64_frame_base_address, |
| 566 | sparc64_frame_base_address, |
| 567 | sparc64_frame_base_address |
| 568 | }; |
| 569 | \f |
| 570 | /* Check whether TYPE must be 16-byte aligned. */ |
| 571 | |
| 572 | static int |
| 573 | sparc64_16_byte_align_p (struct type *type) |
| 574 | { |
| 575 | if (sparc64_floating_p (type) && TYPE_LENGTH (type) == 16) |
| 576 | return 1; |
| 577 | |
| 578 | if (sparc64_structure_or_union_p (type)) |
| 579 | { |
| 580 | int i; |
| 581 | |
| 582 | for (i = 0; i < TYPE_NFIELDS (type); i++) |
| 583 | { |
| 584 | struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, i)); |
| 585 | |
| 586 | if (sparc64_16_byte_align_p (subtype)) |
| 587 | return 1; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | /* Store floating fields of element ELEMENT of an "parameter array" |
| 595 | that has type TYPE and is stored at BITPOS in VALBUF in the |
| 596 | apropriate registers of REGCACHE. This function can be called |
| 597 | recursively and therefore handles floating types in addition to |
| 598 | structures. */ |
| 599 | |
| 600 | static void |
| 601 | sparc64_store_floating_fields (struct regcache *regcache, struct type *type, |
| 602 | const gdb_byte *valbuf, int element, int bitpos) |
| 603 | { |
| 604 | gdb_assert (element < 16); |
| 605 | |
| 606 | if (sparc64_floating_p (type)) |
| 607 | { |
| 608 | int len = TYPE_LENGTH (type); |
| 609 | int regnum; |
| 610 | |
| 611 | if (len == 16) |
| 612 | { |
| 613 | gdb_assert (bitpos == 0); |
| 614 | gdb_assert ((element % 2) == 0); |
| 615 | |
| 616 | regnum = SPARC64_Q0_REGNUM + element / 2; |
| 617 | regcache_cooked_write (regcache, regnum, valbuf); |
| 618 | } |
| 619 | else if (len == 8) |
| 620 | { |
| 621 | gdb_assert (bitpos == 0 || bitpos == 64); |
| 622 | |
| 623 | regnum = SPARC64_D0_REGNUM + element + bitpos / 64; |
| 624 | regcache_cooked_write (regcache, regnum, valbuf + (bitpos / 8)); |
| 625 | } |
| 626 | else |
| 627 | { |
| 628 | gdb_assert (len == 4); |
| 629 | gdb_assert (bitpos % 32 == 0 && bitpos >= 0 && bitpos < 128); |
| 630 | |
| 631 | regnum = SPARC_F0_REGNUM + element * 2 + bitpos / 32; |
| 632 | regcache_cooked_write (regcache, regnum, valbuf + (bitpos / 8)); |
| 633 | } |
| 634 | } |
| 635 | else if (sparc64_structure_or_union_p (type)) |
| 636 | { |
| 637 | int i; |
| 638 | |
| 639 | for (i = 0; i < TYPE_NFIELDS (type); i++) |
| 640 | { |
| 641 | struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, i)); |
| 642 | int subpos = bitpos + TYPE_FIELD_BITPOS (type, i); |
| 643 | |
| 644 | sparc64_store_floating_fields (regcache, subtype, valbuf, |
| 645 | element, subpos); |
| 646 | } |
| 647 | |
| 648 | /* GCC has an interesting bug. If TYPE is a structure that has |
| 649 | a single `float' member, GCC doesn't treat it as a structure |
| 650 | at all, but rather as an ordinary `float' argument. This |
| 651 | argument will be stored in %f1, as required by the psABI. |
| 652 | However, as a member of a structure the psABI requires it to |
| 653 | be stored in %f0. This bug is present in GCC 3.3.2, but |
| 654 | probably in older releases to. To appease GCC, if a |
| 655 | structure has only a single `float' member, we store its |
| 656 | value in %f1 too (we already have stored in %f0). */ |
| 657 | if (TYPE_NFIELDS (type) == 1) |
| 658 | { |
| 659 | struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 660 | |
| 661 | if (sparc64_floating_p (subtype) && TYPE_LENGTH (subtype) == 4) |
| 662 | regcache_cooked_write (regcache, SPARC_F1_REGNUM, valbuf); |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /* Fetch floating fields from a variable of type TYPE from the |
| 668 | appropriate registers for BITPOS in REGCACHE and store it at BITPOS |
| 669 | in VALBUF. This function can be called recursively and therefore |
| 670 | handles floating types in addition to structures. */ |
| 671 | |
| 672 | static void |
| 673 | sparc64_extract_floating_fields (struct regcache *regcache, struct type *type, |
| 674 | gdb_byte *valbuf, int bitpos) |
| 675 | { |
| 676 | if (sparc64_floating_p (type)) |
| 677 | { |
| 678 | int len = TYPE_LENGTH (type); |
| 679 | int regnum; |
| 680 | |
| 681 | if (len == 16) |
| 682 | { |
| 683 | gdb_assert (bitpos == 0 || bitpos == 128); |
| 684 | |
| 685 | regnum = SPARC64_Q0_REGNUM + bitpos / 128; |
| 686 | regcache_cooked_read (regcache, regnum, valbuf + (bitpos / 8)); |
| 687 | } |
| 688 | else if (len == 8) |
| 689 | { |
| 690 | gdb_assert (bitpos % 64 == 0 && bitpos >= 0 && bitpos < 256); |
| 691 | |
| 692 | regnum = SPARC64_D0_REGNUM + bitpos / 64; |
| 693 | regcache_cooked_read (regcache, regnum, valbuf + (bitpos / 8)); |
| 694 | } |
| 695 | else |
| 696 | { |
| 697 | gdb_assert (len == 4); |
| 698 | gdb_assert (bitpos % 32 == 0 && bitpos >= 0 && bitpos < 256); |
| 699 | |
| 700 | regnum = SPARC_F0_REGNUM + bitpos / 32; |
| 701 | regcache_cooked_read (regcache, regnum, valbuf + (bitpos / 8)); |
| 702 | } |
| 703 | } |
| 704 | else if (sparc64_structure_or_union_p (type)) |
| 705 | { |
| 706 | int i; |
| 707 | |
| 708 | for (i = 0; i < TYPE_NFIELDS (type); i++) |
| 709 | { |
| 710 | struct type *subtype = check_typedef (TYPE_FIELD_TYPE (type, i)); |
| 711 | int subpos = bitpos + TYPE_FIELD_BITPOS (type, i); |
| 712 | |
| 713 | sparc64_extract_floating_fields (regcache, subtype, valbuf, subpos); |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | /* Store the NARGS arguments ARGS and STRUCT_ADDR (if STRUCT_RETURN is |
| 719 | non-zero) in REGCACHE and on the stack (starting from address SP). */ |
| 720 | |
| 721 | static CORE_ADDR |
| 722 | sparc64_store_arguments (struct regcache *regcache, int nargs, |
| 723 | struct value **args, CORE_ADDR sp, |
| 724 | int struct_return, CORE_ADDR struct_addr) |
| 725 | { |
| 726 | /* Number of extended words in the "parameter array". */ |
| 727 | int num_elements = 0; |
| 728 | int element = 0; |
| 729 | int i; |
| 730 | |
| 731 | /* Take BIAS into account. */ |
| 732 | sp += BIAS; |
| 733 | |
| 734 | /* First we calculate the number of extended words in the "parameter |
| 735 | array". While doing so we also convert some of the arguments. */ |
| 736 | |
| 737 | if (struct_return) |
| 738 | num_elements++; |
| 739 | |
| 740 | for (i = 0; i < nargs; i++) |
| 741 | { |
| 742 | struct type *type = value_type (args[i]); |
| 743 | int len = TYPE_LENGTH (type); |
| 744 | |
| 745 | if (sparc64_structure_or_union_p (type)) |
| 746 | { |
| 747 | /* Structure or Union arguments. */ |
| 748 | if (len <= 16) |
| 749 | { |
| 750 | if (num_elements % 2 && sparc64_16_byte_align_p (type)) |
| 751 | num_elements++; |
| 752 | num_elements += ((len + 7) / 8); |
| 753 | } |
| 754 | else |
| 755 | { |
| 756 | /* The psABI says that "Structures or unions larger than |
| 757 | sixteen bytes are copied by the caller and passed |
| 758 | indirectly; the caller will pass the address of a |
| 759 | correctly aligned structure value. This sixty-four |
| 760 | bit address will occupy one word in the parameter |
| 761 | array, and may be promoted to an %o register like any |
| 762 | other pointer value." Allocate memory for these |
| 763 | values on the stack. */ |
| 764 | sp -= len; |
| 765 | |
| 766 | /* Use 16-byte alignment for these values. That's |
| 767 | always correct, and wasting a few bytes shouldn't be |
| 768 | a problem. */ |
| 769 | sp &= ~0xf; |
| 770 | |
| 771 | write_memory (sp, value_contents (args[i]), len); |
| 772 | args[i] = value_from_pointer (lookup_pointer_type (type), sp); |
| 773 | num_elements++; |
| 774 | } |
| 775 | } |
| 776 | else if (sparc64_floating_p (type)) |
| 777 | { |
| 778 | /* Floating arguments. */ |
| 779 | |
| 780 | if (len == 16) |
| 781 | { |
| 782 | /* The psABI says that "Each quad-precision parameter |
| 783 | value will be assigned to two extended words in the |
| 784 | parameter array. */ |
| 785 | num_elements += 2; |
| 786 | |
| 787 | /* The psABI says that "Long doubles must be |
| 788 | quad-aligned, and thus a hole might be introduced |
| 789 | into the parameter array to force alignment." Skip |
| 790 | an element if necessary. */ |
| 791 | if (num_elements % 2) |
| 792 | num_elements++; |
| 793 | } |
| 794 | else |
| 795 | num_elements++; |
| 796 | } |
| 797 | else |
| 798 | { |
| 799 | /* Integral and pointer arguments. */ |
| 800 | gdb_assert (sparc64_integral_or_pointer_p (type)); |
| 801 | |
| 802 | /* The psABI says that "Each argument value of integral type |
| 803 | smaller than an extended word will be widened by the |
| 804 | caller to an extended word according to the signed-ness |
| 805 | of the argument type." */ |
| 806 | if (len < 8) |
| 807 | args[i] = value_cast (builtin_type_int64, args[i]); |
| 808 | num_elements++; |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | /* Allocate the "parameter array". */ |
| 813 | sp -= num_elements * 8; |
| 814 | |
| 815 | /* The psABI says that "Every stack frame must be 16-byte aligned." */ |
| 816 | sp &= ~0xf; |
| 817 | |
| 818 | /* Now we store the arguments in to the "paramater array". Some |
| 819 | Integer or Pointer arguments and Structure or Union arguments |
| 820 | will be passed in %o registers. Some Floating arguments and |
| 821 | floating members of structures are passed in floating-point |
| 822 | registers. However, for functions with variable arguments, |
| 823 | floating arguments are stored in an %0 register, and for |
| 824 | functions without a prototype floating arguments are stored in |
| 825 | both a floating-point and an %o registers, or a floating-point |
| 826 | register and memory. To simplify the logic here we always pass |
| 827 | arguments in memory, an %o register, and a floating-point |
| 828 | register if appropriate. This should be no problem since the |
| 829 | contents of any unused memory or registers in the "parameter |
| 830 | array" are undefined. */ |
| 831 | |
| 832 | if (struct_return) |
| 833 | { |
| 834 | regcache_cooked_write_unsigned (regcache, SPARC_O0_REGNUM, struct_addr); |
| 835 | element++; |
| 836 | } |
| 837 | |
| 838 | for (i = 0; i < nargs; i++) |
| 839 | { |
| 840 | const gdb_byte *valbuf = value_contents (args[i]); |
| 841 | struct type *type = value_type (args[i]); |
| 842 | int len = TYPE_LENGTH (type); |
| 843 | int regnum = -1; |
| 844 | gdb_byte buf[16]; |
| 845 | |
| 846 | if (sparc64_structure_or_union_p (type)) |
| 847 | { |
| 848 | /* Structure or Union arguments. */ |
| 849 | gdb_assert (len <= 16); |
| 850 | memset (buf, 0, sizeof (buf)); |
| 851 | valbuf = memcpy (buf, valbuf, len); |
| 852 | |
| 853 | if (element % 2 && sparc64_16_byte_align_p (type)) |
| 854 | element++; |
| 855 | |
| 856 | if (element < 6) |
| 857 | { |
| 858 | regnum = SPARC_O0_REGNUM + element; |
| 859 | if (len > 8 && element < 5) |
| 860 | regcache_cooked_write (regcache, regnum + 1, valbuf + 8); |
| 861 | } |
| 862 | |
| 863 | if (element < 16) |
| 864 | sparc64_store_floating_fields (regcache, type, valbuf, element, 0); |
| 865 | } |
| 866 | else if (sparc64_floating_p (type)) |
| 867 | { |
| 868 | /* Floating arguments. */ |
| 869 | if (len == 16) |
| 870 | { |
| 871 | if (element % 2) |
| 872 | element++; |
| 873 | if (element < 16) |
| 874 | regnum = SPARC64_Q0_REGNUM + element / 2; |
| 875 | } |
| 876 | else if (len == 8) |
| 877 | { |
| 878 | if (element < 16) |
| 879 | regnum = SPARC64_D0_REGNUM + element; |
| 880 | } |
| 881 | else |
| 882 | { |
| 883 | /* The psABI says "Each single-precision parameter value |
| 884 | will be assigned to one extended word in the |
| 885 | parameter array, and right-justified within that |
| 886 | word; the left half (even floatregister) is |
| 887 | undefined." Even though the psABI says that "the |
| 888 | left half is undefined", set it to zero here. */ |
| 889 | memset (buf, 0, 4); |
| 890 | memcpy (buf + 4, valbuf, 4); |
| 891 | valbuf = buf; |
| 892 | len = 8; |
| 893 | if (element < 16) |
| 894 | regnum = SPARC64_D0_REGNUM + element; |
| 895 | } |
| 896 | } |
| 897 | else |
| 898 | { |
| 899 | /* Integral and pointer arguments. */ |
| 900 | gdb_assert (len == 8); |
| 901 | if (element < 6) |
| 902 | regnum = SPARC_O0_REGNUM + element; |
| 903 | } |
| 904 | |
| 905 | if (regnum != -1) |
| 906 | { |
| 907 | regcache_cooked_write (regcache, regnum, valbuf); |
| 908 | |
| 909 | /* If we're storing the value in a floating-point register, |
| 910 | also store it in the corresponding %0 register(s). */ |
| 911 | if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D10_REGNUM) |
| 912 | { |
| 913 | gdb_assert (element < 6); |
| 914 | regnum = SPARC_O0_REGNUM + element; |
| 915 | regcache_cooked_write (regcache, regnum, valbuf); |
| 916 | } |
| 917 | else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q8_REGNUM) |
| 918 | { |
| 919 | gdb_assert (element < 6); |
| 920 | regnum = SPARC_O0_REGNUM + element; |
| 921 | regcache_cooked_write (regcache, regnum, valbuf); |
| 922 | regcache_cooked_write (regcache, regnum + 1, valbuf + 8); |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | /* Always store the argument in memory. */ |
| 927 | write_memory (sp + element * 8, valbuf, len); |
| 928 | element += ((len + 7) / 8); |
| 929 | } |
| 930 | |
| 931 | gdb_assert (element == num_elements); |
| 932 | |
| 933 | /* Take BIAS into account. */ |
| 934 | sp -= BIAS; |
| 935 | return sp; |
| 936 | } |
| 937 | |
| 938 | static CORE_ADDR |
| 939 | sparc64_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
| 940 | struct regcache *regcache, CORE_ADDR bp_addr, |
| 941 | int nargs, struct value **args, CORE_ADDR sp, |
| 942 | int struct_return, CORE_ADDR struct_addr) |
| 943 | { |
| 944 | /* Set return address. */ |
| 945 | regcache_cooked_write_unsigned (regcache, SPARC_O7_REGNUM, bp_addr - 8); |
| 946 | |
| 947 | /* Set up function arguments. */ |
| 948 | sp = sparc64_store_arguments (regcache, nargs, args, sp, |
| 949 | struct_return, struct_addr); |
| 950 | |
| 951 | /* Allocate the register save area. */ |
| 952 | sp -= 16 * 8; |
| 953 | |
| 954 | /* Stack should be 16-byte aligned at this point. */ |
| 955 | gdb_assert ((sp + BIAS) % 16 == 0); |
| 956 | |
| 957 | /* Finally, update the stack pointer. */ |
| 958 | regcache_cooked_write_unsigned (regcache, SPARC_SP_REGNUM, sp); |
| 959 | |
| 960 | return sp + BIAS; |
| 961 | } |
| 962 | \f |
| 963 | |
| 964 | /* Extract from an array REGBUF containing the (raw) register state, a |
| 965 | function return value of TYPE, and copy that into VALBUF. */ |
| 966 | |
| 967 | static void |
| 968 | sparc64_extract_return_value (struct type *type, struct regcache *regcache, |
| 969 | gdb_byte *valbuf) |
| 970 | { |
| 971 | int len = TYPE_LENGTH (type); |
| 972 | gdb_byte buf[32]; |
| 973 | int i; |
| 974 | |
| 975 | if (sparc64_structure_or_union_p (type)) |
| 976 | { |
| 977 | /* Structure or Union return values. */ |
| 978 | gdb_assert (len <= 32); |
| 979 | |
| 980 | for (i = 0; i < ((len + 7) / 8); i++) |
| 981 | regcache_cooked_read (regcache, SPARC_O0_REGNUM + i, buf + i * 8); |
| 982 | if (TYPE_CODE (type) != TYPE_CODE_UNION) |
| 983 | sparc64_extract_floating_fields (regcache, type, buf, 0); |
| 984 | memcpy (valbuf, buf, len); |
| 985 | } |
| 986 | else if (sparc64_floating_p (type)) |
| 987 | { |
| 988 | /* Floating return values. */ |
| 989 | for (i = 0; i < len / 4; i++) |
| 990 | regcache_cooked_read (regcache, SPARC_F0_REGNUM + i, buf + i * 4); |
| 991 | memcpy (valbuf, buf, len); |
| 992 | } |
| 993 | else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 994 | { |
| 995 | /* Small arrays are returned the same way as small structures. */ |
| 996 | gdb_assert (len <= 32); |
| 997 | |
| 998 | for (i = 0; i < ((len + 7) / 8); i++) |
| 999 | regcache_cooked_read (regcache, SPARC_O0_REGNUM + i, buf + i * 8); |
| 1000 | memcpy (valbuf, buf, len); |
| 1001 | } |
| 1002 | else |
| 1003 | { |
| 1004 | /* Integral and pointer return values. */ |
| 1005 | gdb_assert (sparc64_integral_or_pointer_p (type)); |
| 1006 | |
| 1007 | /* Just stripping off any unused bytes should preserve the |
| 1008 | signed-ness just fine. */ |
| 1009 | regcache_cooked_read (regcache, SPARC_O0_REGNUM, buf); |
| 1010 | memcpy (valbuf, buf + 8 - len, len); |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | /* Write into the appropriate registers a function return value stored |
| 1015 | in VALBUF of type TYPE. */ |
| 1016 | |
| 1017 | static void |
| 1018 | sparc64_store_return_value (struct type *type, struct regcache *regcache, |
| 1019 | const gdb_byte *valbuf) |
| 1020 | { |
| 1021 | int len = TYPE_LENGTH (type); |
| 1022 | gdb_byte buf[16]; |
| 1023 | int i; |
| 1024 | |
| 1025 | if (sparc64_structure_or_union_p (type)) |
| 1026 | { |
| 1027 | /* Structure or Union return values. */ |
| 1028 | gdb_assert (len <= 32); |
| 1029 | |
| 1030 | /* Simplify matters by storing the complete value (including |
| 1031 | floating members) into %o0 and %o1. Floating members are |
| 1032 | also store in the appropriate floating-point registers. */ |
| 1033 | memset (buf, 0, sizeof (buf)); |
| 1034 | memcpy (buf, valbuf, len); |
| 1035 | for (i = 0; i < ((len + 7) / 8); i++) |
| 1036 | regcache_cooked_write (regcache, SPARC_O0_REGNUM + i, buf + i * 8); |
| 1037 | if (TYPE_CODE (type) != TYPE_CODE_UNION) |
| 1038 | sparc64_store_floating_fields (regcache, type, buf, 0, 0); |
| 1039 | } |
| 1040 | else if (sparc64_floating_p (type)) |
| 1041 | { |
| 1042 | /* Floating return values. */ |
| 1043 | memcpy (buf, valbuf, len); |
| 1044 | for (i = 0; i < len / 4; i++) |
| 1045 | regcache_cooked_write (regcache, SPARC_F0_REGNUM + i, buf + i * 4); |
| 1046 | } |
| 1047 | else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) |
| 1048 | { |
| 1049 | /* Small arrays are returned the same way as small structures. */ |
| 1050 | gdb_assert (len <= 32); |
| 1051 | |
| 1052 | memset (buf, 0, sizeof (buf)); |
| 1053 | memcpy (buf, valbuf, len); |
| 1054 | for (i = 0; i < ((len + 7) / 8); i++) |
| 1055 | regcache_cooked_write (regcache, SPARC_O0_REGNUM + i, buf + i * 8); |
| 1056 | } |
| 1057 | else |
| 1058 | { |
| 1059 | /* Integral and pointer return values. */ |
| 1060 | gdb_assert (sparc64_integral_or_pointer_p (type)); |
| 1061 | |
| 1062 | /* ??? Do we need to do any sign-extension here? */ |
| 1063 | memset (buf, 0, 8); |
| 1064 | memcpy (buf + 8 - len, valbuf, len); |
| 1065 | regcache_cooked_write (regcache, SPARC_O0_REGNUM, buf); |
| 1066 | } |
| 1067 | } |
| 1068 | |
| 1069 | static enum return_value_convention |
| 1070 | sparc64_return_value (struct gdbarch *gdbarch, struct type *type, |
| 1071 | struct regcache *regcache, gdb_byte *readbuf, |
| 1072 | const gdb_byte *writebuf) |
| 1073 | { |
| 1074 | if (TYPE_LENGTH (type) > 32) |
| 1075 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 1076 | |
| 1077 | if (readbuf) |
| 1078 | sparc64_extract_return_value (type, regcache, readbuf); |
| 1079 | if (writebuf) |
| 1080 | sparc64_store_return_value (type, regcache, writebuf); |
| 1081 | |
| 1082 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1083 | } |
| 1084 | \f |
| 1085 | |
| 1086 | static void |
| 1087 | sparc64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, |
| 1088 | struct dwarf2_frame_state_reg *reg, |
| 1089 | struct frame_info *next_frame) |
| 1090 | { |
| 1091 | switch (regnum) |
| 1092 | { |
| 1093 | case SPARC_G0_REGNUM: |
| 1094 | /* Since %g0 is always zero, there is no point in saving it, and |
| 1095 | people will be inclined omit it from the CFI. Make sure we |
| 1096 | don't warn about that. */ |
| 1097 | reg->how = DWARF2_FRAME_REG_SAME_VALUE; |
| 1098 | break; |
| 1099 | case SPARC_SP_REGNUM: |
| 1100 | reg->how = DWARF2_FRAME_REG_CFA; |
| 1101 | break; |
| 1102 | case SPARC64_PC_REGNUM: |
| 1103 | reg->how = DWARF2_FRAME_REG_RA_OFFSET; |
| 1104 | reg->loc.offset = 8; |
| 1105 | break; |
| 1106 | case SPARC64_NPC_REGNUM: |
| 1107 | reg->how = DWARF2_FRAME_REG_RA_OFFSET; |
| 1108 | reg->loc.offset = 12; |
| 1109 | break; |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | void |
| 1114 | sparc64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 1115 | { |
| 1116 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1117 | |
| 1118 | tdep->pc_regnum = SPARC64_PC_REGNUM; |
| 1119 | tdep->npc_regnum = SPARC64_NPC_REGNUM; |
| 1120 | |
| 1121 | /* This is what all the fuss is about. */ |
| 1122 | set_gdbarch_long_bit (gdbarch, 64); |
| 1123 | set_gdbarch_long_long_bit (gdbarch, 64); |
| 1124 | set_gdbarch_ptr_bit (gdbarch, 64); |
| 1125 | |
| 1126 | set_gdbarch_num_regs (gdbarch, SPARC64_NUM_REGS); |
| 1127 | set_gdbarch_register_name (gdbarch, sparc64_register_name); |
| 1128 | set_gdbarch_register_type (gdbarch, sparc64_register_type); |
| 1129 | set_gdbarch_num_pseudo_regs (gdbarch, SPARC64_NUM_PSEUDO_REGS); |
| 1130 | set_gdbarch_pseudo_register_read (gdbarch, sparc64_pseudo_register_read); |
| 1131 | set_gdbarch_pseudo_register_write (gdbarch, sparc64_pseudo_register_write); |
| 1132 | |
| 1133 | /* Register numbers of various important registers. */ |
| 1134 | set_gdbarch_pc_regnum (gdbarch, SPARC64_PC_REGNUM); /* %pc */ |
| 1135 | |
| 1136 | /* Call dummy code. */ |
| 1137 | set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); |
| 1138 | set_gdbarch_push_dummy_code (gdbarch, NULL); |
| 1139 | set_gdbarch_push_dummy_call (gdbarch, sparc64_push_dummy_call); |
| 1140 | |
| 1141 | set_gdbarch_return_value (gdbarch, sparc64_return_value); |
| 1142 | set_gdbarch_stabs_argument_has_addr |
| 1143 | (gdbarch, default_stabs_argument_has_addr); |
| 1144 | |
| 1145 | set_gdbarch_skip_prologue (gdbarch, sparc64_skip_prologue); |
| 1146 | |
| 1147 | /* Hook in the DWARF CFI frame unwinder. */ |
| 1148 | dwarf2_frame_set_init_reg (gdbarch, sparc64_dwarf2_frame_init_reg); |
| 1149 | /* FIXME: kettenis/20050423: Don't enable the unwinder until the |
| 1150 | StackGhost issues have been resolved. */ |
| 1151 | |
| 1152 | frame_unwind_append_sniffer (gdbarch, sparc64_frame_sniffer); |
| 1153 | frame_base_set_default (gdbarch, &sparc64_frame_base); |
| 1154 | } |
| 1155 | \f |
| 1156 | |
| 1157 | /* Helper functions for dealing with register sets. */ |
| 1158 | |
| 1159 | #define TSTATE_CWP 0x000000000000001fULL |
| 1160 | #define TSTATE_ICC 0x0000000f00000000ULL |
| 1161 | #define TSTATE_XCC 0x000000f000000000ULL |
| 1162 | |
| 1163 | #define PSR_S 0x00000080 |
| 1164 | #define PSR_ICC 0x00f00000 |
| 1165 | #define PSR_VERS 0x0f000000 |
| 1166 | #define PSR_IMPL 0xf0000000 |
| 1167 | #define PSR_V8PLUS 0xff000000 |
| 1168 | #define PSR_XCC 0x000f0000 |
| 1169 | |
| 1170 | void |
| 1171 | sparc64_supply_gregset (const struct sparc_gregset *gregset, |
| 1172 | struct regcache *regcache, |
| 1173 | int regnum, const void *gregs) |
| 1174 | { |
| 1175 | int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); |
| 1176 | const gdb_byte *regs = gregs; |
| 1177 | int i; |
| 1178 | |
| 1179 | if (sparc32) |
| 1180 | { |
| 1181 | if (regnum == SPARC32_PSR_REGNUM || regnum == -1) |
| 1182 | { |
| 1183 | int offset = gregset->r_tstate_offset; |
| 1184 | ULONGEST tstate, psr; |
| 1185 | gdb_byte buf[4]; |
| 1186 | |
| 1187 | tstate = extract_unsigned_integer (regs + offset, 8); |
| 1188 | psr = ((tstate & TSTATE_CWP) | PSR_S | ((tstate & TSTATE_ICC) >> 12) |
| 1189 | | ((tstate & TSTATE_XCC) >> 20) | PSR_V8PLUS); |
| 1190 | store_unsigned_integer (buf, 4, psr); |
| 1191 | regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, buf); |
| 1192 | } |
| 1193 | |
| 1194 | if (regnum == SPARC32_PC_REGNUM || regnum == -1) |
| 1195 | regcache_raw_supply (regcache, SPARC32_PC_REGNUM, |
| 1196 | regs + gregset->r_pc_offset + 4); |
| 1197 | |
| 1198 | if (regnum == SPARC32_NPC_REGNUM || regnum == -1) |
| 1199 | regcache_raw_supply (regcache, SPARC32_NPC_REGNUM, |
| 1200 | regs + gregset->r_npc_offset + 4); |
| 1201 | |
| 1202 | if (regnum == SPARC32_Y_REGNUM || regnum == -1) |
| 1203 | { |
| 1204 | int offset = gregset->r_y_offset + 8 - gregset->r_y_size; |
| 1205 | regcache_raw_supply (regcache, SPARC32_Y_REGNUM, regs + offset); |
| 1206 | } |
| 1207 | } |
| 1208 | else |
| 1209 | { |
| 1210 | if (regnum == SPARC64_STATE_REGNUM || regnum == -1) |
| 1211 | regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, |
| 1212 | regs + gregset->r_tstate_offset); |
| 1213 | |
| 1214 | if (regnum == SPARC64_PC_REGNUM || regnum == -1) |
| 1215 | regcache_raw_supply (regcache, SPARC64_PC_REGNUM, |
| 1216 | regs + gregset->r_pc_offset); |
| 1217 | |
| 1218 | if (regnum == SPARC64_NPC_REGNUM || regnum == -1) |
| 1219 | regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, |
| 1220 | regs + gregset->r_npc_offset); |
| 1221 | |
| 1222 | if (regnum == SPARC64_Y_REGNUM || regnum == -1) |
| 1223 | { |
| 1224 | gdb_byte buf[8]; |
| 1225 | |
| 1226 | memset (buf, 0, 8); |
| 1227 | memcpy (buf + 8 - gregset->r_y_size, |
| 1228 | regs + gregset->r_y_offset, gregset->r_y_size); |
| 1229 | regcache_raw_supply (regcache, SPARC64_Y_REGNUM, buf); |
| 1230 | } |
| 1231 | |
| 1232 | if ((regnum == SPARC64_FPRS_REGNUM || regnum == -1) |
| 1233 | && gregset->r_fprs_offset != -1) |
| 1234 | regcache_raw_supply (regcache, SPARC64_FPRS_REGNUM, |
| 1235 | regs + gregset->r_fprs_offset); |
| 1236 | } |
| 1237 | |
| 1238 | if (regnum == SPARC_G0_REGNUM || regnum == -1) |
| 1239 | regcache_raw_supply (regcache, SPARC_G0_REGNUM, NULL); |
| 1240 | |
| 1241 | if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1) |
| 1242 | { |
| 1243 | int offset = gregset->r_g1_offset; |
| 1244 | |
| 1245 | if (sparc32) |
| 1246 | offset += 4; |
| 1247 | |
| 1248 | for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++) |
| 1249 | { |
| 1250 | if (regnum == i || regnum == -1) |
| 1251 | regcache_raw_supply (regcache, i, regs + offset); |
| 1252 | offset += 8; |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1) |
| 1257 | { |
| 1258 | /* Not all of the register set variants include Locals and |
| 1259 | Inputs. For those that don't, we read them off the stack. */ |
| 1260 | if (gregset->r_l0_offset == -1) |
| 1261 | { |
| 1262 | ULONGEST sp; |
| 1263 | |
| 1264 | regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp); |
| 1265 | sparc_supply_rwindow (regcache, sp, regnum); |
| 1266 | } |
| 1267 | else |
| 1268 | { |
| 1269 | int offset = gregset->r_l0_offset; |
| 1270 | |
| 1271 | if (sparc32) |
| 1272 | offset += 4; |
| 1273 | |
| 1274 | for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) |
| 1275 | { |
| 1276 | if (regnum == i || regnum == -1) |
| 1277 | regcache_raw_supply (regcache, i, regs + offset); |
| 1278 | offset += 8; |
| 1279 | } |
| 1280 | } |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | void |
| 1285 | sparc64_collect_gregset (const struct sparc_gregset *gregset, |
| 1286 | const struct regcache *regcache, |
| 1287 | int regnum, void *gregs) |
| 1288 | { |
| 1289 | int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); |
| 1290 | gdb_byte *regs = gregs; |
| 1291 | int i; |
| 1292 | |
| 1293 | if (sparc32) |
| 1294 | { |
| 1295 | if (regnum == SPARC32_PSR_REGNUM || regnum == -1) |
| 1296 | { |
| 1297 | int offset = gregset->r_tstate_offset; |
| 1298 | ULONGEST tstate, psr; |
| 1299 | gdb_byte buf[8]; |
| 1300 | |
| 1301 | tstate = extract_unsigned_integer (regs + offset, 8); |
| 1302 | regcache_raw_collect (regcache, SPARC32_PSR_REGNUM, buf); |
| 1303 | psr = extract_unsigned_integer (buf, 4); |
| 1304 | tstate |= (psr & PSR_ICC) << 12; |
| 1305 | if ((psr & (PSR_VERS | PSR_IMPL)) == PSR_V8PLUS) |
| 1306 | tstate |= (psr & PSR_XCC) << 20; |
| 1307 | store_unsigned_integer (buf, 8, tstate); |
| 1308 | memcpy (regs + offset, buf, 8); |
| 1309 | } |
| 1310 | |
| 1311 | if (regnum == SPARC32_PC_REGNUM || regnum == -1) |
| 1312 | regcache_raw_collect (regcache, SPARC32_PC_REGNUM, |
| 1313 | regs + gregset->r_pc_offset + 4); |
| 1314 | |
| 1315 | if (regnum == SPARC32_NPC_REGNUM || regnum == -1) |
| 1316 | regcache_raw_collect (regcache, SPARC32_NPC_REGNUM, |
| 1317 | regs + gregset->r_npc_offset + 4); |
| 1318 | |
| 1319 | if (regnum == SPARC32_Y_REGNUM || regnum == -1) |
| 1320 | { |
| 1321 | int offset = gregset->r_y_offset + 8 - gregset->r_y_size; |
| 1322 | regcache_raw_collect (regcache, SPARC32_Y_REGNUM, regs + offset); |
| 1323 | } |
| 1324 | } |
| 1325 | else |
| 1326 | { |
| 1327 | if (regnum == SPARC64_STATE_REGNUM || regnum == -1) |
| 1328 | regcache_raw_collect (regcache, SPARC64_STATE_REGNUM, |
| 1329 | regs + gregset->r_tstate_offset); |
| 1330 | |
| 1331 | if (regnum == SPARC64_PC_REGNUM || regnum == -1) |
| 1332 | regcache_raw_collect (regcache, SPARC64_PC_REGNUM, |
| 1333 | regs + gregset->r_pc_offset); |
| 1334 | |
| 1335 | if (regnum == SPARC64_NPC_REGNUM || regnum == -1) |
| 1336 | regcache_raw_collect (regcache, SPARC64_NPC_REGNUM, |
| 1337 | regs + gregset->r_npc_offset); |
| 1338 | |
| 1339 | if (regnum == SPARC64_Y_REGNUM || regnum == -1) |
| 1340 | { |
| 1341 | gdb_byte buf[8]; |
| 1342 | |
| 1343 | regcache_raw_collect (regcache, SPARC64_Y_REGNUM, buf); |
| 1344 | memcpy (regs + gregset->r_y_offset, |
| 1345 | buf + 8 - gregset->r_y_size, gregset->r_y_size); |
| 1346 | } |
| 1347 | |
| 1348 | if ((regnum == SPARC64_FPRS_REGNUM || regnum == -1) |
| 1349 | && gregset->r_fprs_offset != -1) |
| 1350 | regcache_raw_collect (regcache, SPARC64_FPRS_REGNUM, |
| 1351 | regs + gregset->r_fprs_offset); |
| 1352 | |
| 1353 | } |
| 1354 | |
| 1355 | if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1) |
| 1356 | { |
| 1357 | int offset = gregset->r_g1_offset; |
| 1358 | |
| 1359 | if (sparc32) |
| 1360 | offset += 4; |
| 1361 | |
| 1362 | /* %g0 is always zero. */ |
| 1363 | for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++) |
| 1364 | { |
| 1365 | if (regnum == i || regnum == -1) |
| 1366 | regcache_raw_collect (regcache, i, regs + offset); |
| 1367 | offset += 8; |
| 1368 | } |
| 1369 | } |
| 1370 | |
| 1371 | if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1) |
| 1372 | { |
| 1373 | /* Not all of the register set variants include Locals and |
| 1374 | Inputs. For those that don't, we read them off the stack. */ |
| 1375 | if (gregset->r_l0_offset != -1) |
| 1376 | { |
| 1377 | int offset = gregset->r_l0_offset; |
| 1378 | |
| 1379 | if (sparc32) |
| 1380 | offset += 4; |
| 1381 | |
| 1382 | for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) |
| 1383 | { |
| 1384 | if (regnum == i || regnum == -1) |
| 1385 | regcache_raw_collect (regcache, i, regs + offset); |
| 1386 | offset += 8; |
| 1387 | } |
| 1388 | } |
| 1389 | } |
| 1390 | } |
| 1391 | |
| 1392 | void |
| 1393 | sparc64_supply_fpregset (struct regcache *regcache, |
| 1394 | int regnum, const void *fpregs) |
| 1395 | { |
| 1396 | int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); |
| 1397 | const gdb_byte *regs = fpregs; |
| 1398 | int i; |
| 1399 | |
| 1400 | for (i = 0; i < 32; i++) |
| 1401 | { |
| 1402 | if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1) |
| 1403 | regcache_raw_supply (regcache, SPARC_F0_REGNUM + i, regs + (i * 4)); |
| 1404 | } |
| 1405 | |
| 1406 | if (sparc32) |
| 1407 | { |
| 1408 | if (regnum == SPARC32_FSR_REGNUM || regnum == -1) |
| 1409 | regcache_raw_supply (regcache, SPARC32_FSR_REGNUM, |
| 1410 | regs + (32 * 4) + (16 * 8) + 4); |
| 1411 | } |
| 1412 | else |
| 1413 | { |
| 1414 | for (i = 0; i < 16; i++) |
| 1415 | { |
| 1416 | if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1) |
| 1417 | regcache_raw_supply (regcache, SPARC64_F32_REGNUM + i, |
| 1418 | regs + (32 * 4) + (i * 8)); |
| 1419 | } |
| 1420 | |
| 1421 | if (regnum == SPARC64_FSR_REGNUM || regnum == -1) |
| 1422 | regcache_raw_supply (regcache, SPARC64_FSR_REGNUM, |
| 1423 | regs + (32 * 4) + (16 * 8)); |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | void |
| 1428 | sparc64_collect_fpregset (const struct regcache *regcache, |
| 1429 | int regnum, void *fpregs) |
| 1430 | { |
| 1431 | int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32); |
| 1432 | gdb_byte *regs = fpregs; |
| 1433 | int i; |
| 1434 | |
| 1435 | for (i = 0; i < 32; i++) |
| 1436 | { |
| 1437 | if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1) |
| 1438 | regcache_raw_collect (regcache, SPARC_F0_REGNUM + i, regs + (i * 4)); |
| 1439 | } |
| 1440 | |
| 1441 | if (sparc32) |
| 1442 | { |
| 1443 | if (regnum == SPARC32_FSR_REGNUM || regnum == -1) |
| 1444 | regcache_raw_collect (regcache, SPARC32_FSR_REGNUM, |
| 1445 | regs + (32 * 4) + (16 * 8) + 4); |
| 1446 | } |
| 1447 | else |
| 1448 | { |
| 1449 | for (i = 0; i < 16; i++) |
| 1450 | { |
| 1451 | if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1) |
| 1452 | regcache_raw_collect (regcache, SPARC64_F32_REGNUM + i, |
| 1453 | regs + (32 * 4) + (i * 8)); |
| 1454 | } |
| 1455 | |
| 1456 | if (regnum == SPARC64_FSR_REGNUM || regnum == -1) |
| 1457 | regcache_raw_collect (regcache, SPARC64_FSR_REGNUM, |
| 1458 | regs + (32 * 4) + (16 * 8)); |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | |
| 1463 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 1464 | void _initialize_sparc64_tdep (void); |
| 1465 | |
| 1466 | void |
| 1467 | _initialize_sparc64_tdep (void) |
| 1468 | { |
| 1469 | /* Initialize the UltraSPARC-specific register types. */ |
| 1470 | sparc64_init_types(); |
| 1471 | } |