| 1 | /* Target-dependent code for Renesas Super-H, for GDB. |
| 2 | |
| 3 | Copyright (C) 1993-2013 Free Software Foundation, Inc. |
| 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 |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 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 |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* Contributed by Steve Chamberlain |
| 21 | sac@cygnus.com. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "frame.h" |
| 25 | #include "frame-base.h" |
| 26 | #include "frame-unwind.h" |
| 27 | #include "dwarf2-frame.h" |
| 28 | #include "symtab.h" |
| 29 | #include "gdbtypes.h" |
| 30 | #include "gdbcmd.h" |
| 31 | #include "gdbcore.h" |
| 32 | #include "value.h" |
| 33 | #include "dis-asm.h" |
| 34 | #include "inferior.h" |
| 35 | #include "gdb_string.h" |
| 36 | #include "gdb_assert.h" |
| 37 | #include "arch-utils.h" |
| 38 | #include "floatformat.h" |
| 39 | #include "regcache.h" |
| 40 | #include "doublest.h" |
| 41 | #include "osabi.h" |
| 42 | #include "reggroups.h" |
| 43 | #include "regset.h" |
| 44 | #include "objfiles.h" |
| 45 | |
| 46 | #include "sh-tdep.h" |
| 47 | #include "sh64-tdep.h" |
| 48 | |
| 49 | #include "elf-bfd.h" |
| 50 | #include "solib-svr4.h" |
| 51 | |
| 52 | /* sh flags */ |
| 53 | #include "elf/sh.h" |
| 54 | #include "dwarf2.h" |
| 55 | /* registers numbers shared with the simulator. */ |
| 56 | #include "gdb/sim-sh.h" |
| 57 | |
| 58 | /* List of "set sh ..." and "show sh ..." commands. */ |
| 59 | static struct cmd_list_element *setshcmdlist = NULL; |
| 60 | static struct cmd_list_element *showshcmdlist = NULL; |
| 61 | |
| 62 | static const char sh_cc_gcc[] = "gcc"; |
| 63 | static const char sh_cc_renesas[] = "renesas"; |
| 64 | static const char *const sh_cc_enum[] = { |
| 65 | sh_cc_gcc, |
| 66 | sh_cc_renesas, |
| 67 | NULL |
| 68 | }; |
| 69 | |
| 70 | static const char *sh_active_calling_convention = sh_cc_gcc; |
| 71 | |
| 72 | #define SH_NUM_REGS 67 |
| 73 | |
| 74 | struct sh_frame_cache |
| 75 | { |
| 76 | /* Base address. */ |
| 77 | CORE_ADDR base; |
| 78 | LONGEST sp_offset; |
| 79 | CORE_ADDR pc; |
| 80 | |
| 81 | /* Flag showing that a frame has been created in the prologue code. */ |
| 82 | int uses_fp; |
| 83 | |
| 84 | /* Saved registers. */ |
| 85 | CORE_ADDR saved_regs[SH_NUM_REGS]; |
| 86 | CORE_ADDR saved_sp; |
| 87 | }; |
| 88 | |
| 89 | static int |
| 90 | sh_is_renesas_calling_convention (struct type *func_type) |
| 91 | { |
| 92 | int val = 0; |
| 93 | |
| 94 | if (func_type) |
| 95 | { |
| 96 | func_type = check_typedef (func_type); |
| 97 | |
| 98 | if (TYPE_CODE (func_type) == TYPE_CODE_PTR) |
| 99 | func_type = check_typedef (TYPE_TARGET_TYPE (func_type)); |
| 100 | |
| 101 | if (TYPE_CODE (func_type) == TYPE_CODE_FUNC |
| 102 | && TYPE_CALLING_CONVENTION (func_type) == DW_CC_GNU_renesas_sh) |
| 103 | val = 1; |
| 104 | } |
| 105 | |
| 106 | if (sh_active_calling_convention == sh_cc_renesas) |
| 107 | val = 1; |
| 108 | |
| 109 | return val; |
| 110 | } |
| 111 | |
| 112 | static const char * |
| 113 | sh_sh_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 114 | { |
| 115 | static char *register_names[] = { |
| 116 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 117 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 118 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 119 | "", "", |
| 120 | "", "", "", "", "", "", "", "", |
| 121 | "", "", "", "", "", "", "", "", |
| 122 | "", "", |
| 123 | "", "", "", "", "", "", "", "", |
| 124 | "", "", "", "", "", "", "", "", |
| 125 | "", "", "", "", "", "", "", "", |
| 126 | }; |
| 127 | if (reg_nr < 0) |
| 128 | return NULL; |
| 129 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 130 | return NULL; |
| 131 | return register_names[reg_nr]; |
| 132 | } |
| 133 | |
| 134 | static const char * |
| 135 | sh_sh3_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 136 | { |
| 137 | static char *register_names[] = { |
| 138 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 139 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 140 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 141 | "", "", |
| 142 | "", "", "", "", "", "", "", "", |
| 143 | "", "", "", "", "", "", "", "", |
| 144 | "ssr", "spc", |
| 145 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 146 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1" |
| 147 | "", "", "", "", "", "", "", "", |
| 148 | }; |
| 149 | if (reg_nr < 0) |
| 150 | return NULL; |
| 151 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 152 | return NULL; |
| 153 | return register_names[reg_nr]; |
| 154 | } |
| 155 | |
| 156 | static const char * |
| 157 | sh_sh3e_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 158 | { |
| 159 | static char *register_names[] = { |
| 160 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 161 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 162 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 163 | "fpul", "fpscr", |
| 164 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 165 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 166 | "ssr", "spc", |
| 167 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 168 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 169 | "", "", "", "", "", "", "", "", |
| 170 | }; |
| 171 | if (reg_nr < 0) |
| 172 | return NULL; |
| 173 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 174 | return NULL; |
| 175 | return register_names[reg_nr]; |
| 176 | } |
| 177 | |
| 178 | static const char * |
| 179 | sh_sh2e_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 180 | { |
| 181 | static char *register_names[] = { |
| 182 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 183 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 184 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 185 | "fpul", "fpscr", |
| 186 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 187 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 188 | "", "", |
| 189 | "", "", "", "", "", "", "", "", |
| 190 | "", "", "", "", "", "", "", "", |
| 191 | "", "", "", "", "", "", "", "", |
| 192 | }; |
| 193 | if (reg_nr < 0) |
| 194 | return NULL; |
| 195 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 196 | return NULL; |
| 197 | return register_names[reg_nr]; |
| 198 | } |
| 199 | |
| 200 | static const char * |
| 201 | sh_sh2a_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 202 | { |
| 203 | static char *register_names[] = { |
| 204 | /* general registers 0-15 */ |
| 205 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 206 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 207 | /* 16 - 22 */ |
| 208 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 209 | /* 23, 24 */ |
| 210 | "fpul", "fpscr", |
| 211 | /* floating point registers 25 - 40 */ |
| 212 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 213 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 214 | /* 41, 42 */ |
| 215 | "", "", |
| 216 | /* 43 - 62. Banked registers. The bank number used is determined by |
| 217 | the bank register (63). */ |
| 218 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 219 | "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", |
| 220 | "machb", "ivnb", "prb", "gbrb", "maclb", |
| 221 | /* 63: register bank number, not a real register but used to |
| 222 | communicate the register bank currently get/set. This register |
| 223 | is hidden to the user, who manipulates it using the pseudo |
| 224 | register called "bank" (67). See below. */ |
| 225 | "", |
| 226 | /* 64 - 66 */ |
| 227 | "ibcr", "ibnr", "tbr", |
| 228 | /* 67: register bank number, the user visible pseudo register. */ |
| 229 | "bank", |
| 230 | /* double precision (pseudo) 68 - 75 */ |
| 231 | "dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14", |
| 232 | }; |
| 233 | if (reg_nr < 0) |
| 234 | return NULL; |
| 235 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 236 | return NULL; |
| 237 | return register_names[reg_nr]; |
| 238 | } |
| 239 | |
| 240 | static const char * |
| 241 | sh_sh2a_nofpu_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 242 | { |
| 243 | static char *register_names[] = { |
| 244 | /* general registers 0-15 */ |
| 245 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 246 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 247 | /* 16 - 22 */ |
| 248 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 249 | /* 23, 24 */ |
| 250 | "", "", |
| 251 | /* floating point registers 25 - 40 */ |
| 252 | "", "", "", "", "", "", "", "", |
| 253 | "", "", "", "", "", "", "", "", |
| 254 | /* 41, 42 */ |
| 255 | "", "", |
| 256 | /* 43 - 62. Banked registers. The bank number used is determined by |
| 257 | the bank register (63). */ |
| 258 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 259 | "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", |
| 260 | "machb", "ivnb", "prb", "gbrb", "maclb", |
| 261 | /* 63: register bank number, not a real register but used to |
| 262 | communicate the register bank currently get/set. This register |
| 263 | is hidden to the user, who manipulates it using the pseudo |
| 264 | register called "bank" (67). See below. */ |
| 265 | "", |
| 266 | /* 64 - 66 */ |
| 267 | "ibcr", "ibnr", "tbr", |
| 268 | /* 67: register bank number, the user visible pseudo register. */ |
| 269 | "bank", |
| 270 | /* double precision (pseudo) 68 - 75 */ |
| 271 | "", "", "", "", "", "", "", "", |
| 272 | }; |
| 273 | if (reg_nr < 0) |
| 274 | return NULL; |
| 275 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 276 | return NULL; |
| 277 | return register_names[reg_nr]; |
| 278 | } |
| 279 | |
| 280 | static const char * |
| 281 | sh_sh_dsp_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 282 | { |
| 283 | static char *register_names[] = { |
| 284 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 285 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 286 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 287 | "", "dsr", |
| 288 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 289 | "y0", "y1", "", "", "", "", "", "mod", |
| 290 | "", "", |
| 291 | "rs", "re", "", "", "", "", "", "", |
| 292 | "", "", "", "", "", "", "", "", |
| 293 | "", "", "", "", "", "", "", "", |
| 294 | }; |
| 295 | if (reg_nr < 0) |
| 296 | return NULL; |
| 297 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 298 | return NULL; |
| 299 | return register_names[reg_nr]; |
| 300 | } |
| 301 | |
| 302 | static const char * |
| 303 | sh_sh3_dsp_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 304 | { |
| 305 | static char *register_names[] = { |
| 306 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 307 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 308 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 309 | "", "dsr", |
| 310 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 311 | "y0", "y1", "", "", "", "", "", "mod", |
| 312 | "ssr", "spc", |
| 313 | "rs", "re", "", "", "", "", "", "", |
| 314 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 315 | "", "", "", "", "", "", "", "", |
| 316 | "", "", "", "", "", "", "", "", |
| 317 | }; |
| 318 | if (reg_nr < 0) |
| 319 | return NULL; |
| 320 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 321 | return NULL; |
| 322 | return register_names[reg_nr]; |
| 323 | } |
| 324 | |
| 325 | static const char * |
| 326 | sh_sh4_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 327 | { |
| 328 | static char *register_names[] = { |
| 329 | /* general registers 0-15 */ |
| 330 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 331 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 332 | /* 16 - 22 */ |
| 333 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 334 | /* 23, 24 */ |
| 335 | "fpul", "fpscr", |
| 336 | /* floating point registers 25 - 40 */ |
| 337 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 338 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 339 | /* 41, 42 */ |
| 340 | "ssr", "spc", |
| 341 | /* bank 0 43 - 50 */ |
| 342 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 343 | /* bank 1 51 - 58 */ |
| 344 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 345 | /* 59 - 66 */ |
| 346 | "", "", "", "", "", "", "", "", |
| 347 | /* pseudo bank register. */ |
| 348 | "", |
| 349 | /* double precision (pseudo) 68 - 75 */ |
| 350 | "dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14", |
| 351 | /* vectors (pseudo) 76 - 79 */ |
| 352 | "fv0", "fv4", "fv8", "fv12", |
| 353 | /* FIXME: missing XF */ |
| 354 | /* FIXME: missing XD */ |
| 355 | }; |
| 356 | if (reg_nr < 0) |
| 357 | return NULL; |
| 358 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 359 | return NULL; |
| 360 | return register_names[reg_nr]; |
| 361 | } |
| 362 | |
| 363 | static const char * |
| 364 | sh_sh4_nofpu_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 365 | { |
| 366 | static char *register_names[] = { |
| 367 | /* general registers 0-15 */ |
| 368 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 369 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 370 | /* 16 - 22 */ |
| 371 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 372 | /* 23, 24 */ |
| 373 | "", "", |
| 374 | /* floating point registers 25 - 40 -- not for nofpu target */ |
| 375 | "", "", "", "", "", "", "", "", |
| 376 | "", "", "", "", "", "", "", "", |
| 377 | /* 41, 42 */ |
| 378 | "ssr", "spc", |
| 379 | /* bank 0 43 - 50 */ |
| 380 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 381 | /* bank 1 51 - 58 */ |
| 382 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 383 | /* 59 - 66 */ |
| 384 | "", "", "", "", "", "", "", "", |
| 385 | /* pseudo bank register. */ |
| 386 | "", |
| 387 | /* double precision (pseudo) 68 - 75 -- not for nofpu target */ |
| 388 | "", "", "", "", "", "", "", "", |
| 389 | /* vectors (pseudo) 76 - 79 -- not for nofpu target */ |
| 390 | "", "", "", "", |
| 391 | }; |
| 392 | if (reg_nr < 0) |
| 393 | return NULL; |
| 394 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 395 | return NULL; |
| 396 | return register_names[reg_nr]; |
| 397 | } |
| 398 | |
| 399 | static const char * |
| 400 | sh_sh4al_dsp_register_name (struct gdbarch *gdbarch, int reg_nr) |
| 401 | { |
| 402 | static char *register_names[] = { |
| 403 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 404 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 405 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 406 | "", "dsr", |
| 407 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 408 | "y0", "y1", "", "", "", "", "", "mod", |
| 409 | "ssr", "spc", |
| 410 | "rs", "re", "", "", "", "", "", "", |
| 411 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 412 | "", "", "", "", "", "", "", "", |
| 413 | "", "", "", "", "", "", "", "", |
| 414 | }; |
| 415 | if (reg_nr < 0) |
| 416 | return NULL; |
| 417 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 418 | return NULL; |
| 419 | return register_names[reg_nr]; |
| 420 | } |
| 421 | |
| 422 | static const unsigned char * |
| 423 | sh_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr) |
| 424 | { |
| 425 | /* 0xc3c3 is trapa #c3, and it works in big and little endian modes. */ |
| 426 | static unsigned char breakpoint[] = { 0xc3, 0xc3 }; |
| 427 | |
| 428 | /* For remote stub targets, trapa #20 is used. */ |
| 429 | if (strcmp (target_shortname, "remote") == 0) |
| 430 | { |
| 431 | static unsigned char big_remote_breakpoint[] = { 0xc3, 0x20 }; |
| 432 | static unsigned char little_remote_breakpoint[] = { 0x20, 0xc3 }; |
| 433 | |
| 434 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 435 | { |
| 436 | *lenptr = sizeof (big_remote_breakpoint); |
| 437 | return big_remote_breakpoint; |
| 438 | } |
| 439 | else |
| 440 | { |
| 441 | *lenptr = sizeof (little_remote_breakpoint); |
| 442 | return little_remote_breakpoint; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | *lenptr = sizeof (breakpoint); |
| 447 | return breakpoint; |
| 448 | } |
| 449 | |
| 450 | /* Prologue looks like |
| 451 | mov.l r14,@-r15 |
| 452 | sts.l pr,@-r15 |
| 453 | mov.l <regs>,@-r15 |
| 454 | sub <room_for_loca_vars>,r15 |
| 455 | mov r15,r14 |
| 456 | |
| 457 | Actually it can be more complicated than this but that's it, basically. */ |
| 458 | |
| 459 | #define GET_SOURCE_REG(x) (((x) >> 4) & 0xf) |
| 460 | #define GET_TARGET_REG(x) (((x) >> 8) & 0xf) |
| 461 | |
| 462 | /* JSR @Rm 0100mmmm00001011 */ |
| 463 | #define IS_JSR(x) (((x) & 0xf0ff) == 0x400b) |
| 464 | |
| 465 | /* STS.L PR,@-r15 0100111100100010 |
| 466 | r15-4-->r15, PR-->(r15) */ |
| 467 | #define IS_STS(x) ((x) == 0x4f22) |
| 468 | |
| 469 | /* STS.L MACL,@-r15 0100111100010010 |
| 470 | r15-4-->r15, MACL-->(r15) */ |
| 471 | #define IS_MACL_STS(x) ((x) == 0x4f12) |
| 472 | |
| 473 | /* MOV.L Rm,@-r15 00101111mmmm0110 |
| 474 | r15-4-->r15, Rm-->(R15) */ |
| 475 | #define IS_PUSH(x) (((x) & 0xff0f) == 0x2f06) |
| 476 | |
| 477 | /* MOV r15,r14 0110111011110011 |
| 478 | r15-->r14 */ |
| 479 | #define IS_MOV_SP_FP(x) ((x) == 0x6ef3) |
| 480 | |
| 481 | /* ADD #imm,r15 01111111iiiiiiii |
| 482 | r15+imm-->r15 */ |
| 483 | #define IS_ADD_IMM_SP(x) (((x) & 0xff00) == 0x7f00) |
| 484 | |
| 485 | #define IS_MOV_R3(x) (((x) & 0xff00) == 0x1a00) |
| 486 | #define IS_SHLL_R3(x) ((x) == 0x4300) |
| 487 | |
| 488 | /* ADD r3,r15 0011111100111100 |
| 489 | r15+r3-->r15 */ |
| 490 | #define IS_ADD_R3SP(x) ((x) == 0x3f3c) |
| 491 | |
| 492 | /* FMOV.S FRm,@-Rn Rn-4-->Rn, FRm-->(Rn) 1111nnnnmmmm1011 |
| 493 | FMOV DRm,@-Rn Rn-8-->Rn, DRm-->(Rn) 1111nnnnmmm01011 |
| 494 | FMOV XDm,@-Rn Rn-8-->Rn, XDm-->(Rn) 1111nnnnmmm11011 */ |
| 495 | /* CV, 2003-08-28: Only suitable with Rn == SP, therefore name changed to |
| 496 | make this entirely clear. */ |
| 497 | /* #define IS_FMOV(x) (((x) & 0xf00f) == 0xf00b) */ |
| 498 | #define IS_FPUSH(x) (((x) & 0xff0f) == 0xff0b) |
| 499 | |
| 500 | /* MOV Rm,Rn Rm-->Rn 0110nnnnmmmm0011 4 <= m <= 7 */ |
| 501 | #define IS_MOV_ARG_TO_REG(x) \ |
| 502 | (((x) & 0xf00f) == 0x6003 && \ |
| 503 | ((x) & 0x00f0) >= 0x0040 && \ |
| 504 | ((x) & 0x00f0) <= 0x0070) |
| 505 | /* MOV.L Rm,@Rn 0010nnnnmmmm0010 n = 14, 4 <= m <= 7 */ |
| 506 | #define IS_MOV_ARG_TO_IND_R14(x) \ |
| 507 | (((x) & 0xff0f) == 0x2e02 && \ |
| 508 | ((x) & 0x00f0) >= 0x0040 && \ |
| 509 | ((x) & 0x00f0) <= 0x0070) |
| 510 | /* MOV.L Rm,@(disp*4,Rn) 00011110mmmmdddd n = 14, 4 <= m <= 7 */ |
| 511 | #define IS_MOV_ARG_TO_IND_R14_WITH_DISP(x) \ |
| 512 | (((x) & 0xff00) == 0x1e00 && \ |
| 513 | ((x) & 0x00f0) >= 0x0040 && \ |
| 514 | ((x) & 0x00f0) <= 0x0070) |
| 515 | |
| 516 | /* MOV.W @(disp*2,PC),Rn 1001nnnndddddddd */ |
| 517 | #define IS_MOVW_PCREL_TO_REG(x) (((x) & 0xf000) == 0x9000) |
| 518 | /* MOV.L @(disp*4,PC),Rn 1101nnnndddddddd */ |
| 519 | #define IS_MOVL_PCREL_TO_REG(x) (((x) & 0xf000) == 0xd000) |
| 520 | /* MOVI20 #imm20,Rn 0000nnnniiii0000 */ |
| 521 | #define IS_MOVI20(x) (((x) & 0xf00f) == 0x0000) |
| 522 | /* SUB Rn,R15 00111111nnnn1000 */ |
| 523 | #define IS_SUB_REG_FROM_SP(x) (((x) & 0xff0f) == 0x3f08) |
| 524 | |
| 525 | #define FPSCR_SZ (1 << 20) |
| 526 | |
| 527 | /* The following instructions are used for epilogue testing. */ |
| 528 | #define IS_RESTORE_FP(x) ((x) == 0x6ef6) |
| 529 | #define IS_RTS(x) ((x) == 0x000b) |
| 530 | #define IS_LDS(x) ((x) == 0x4f26) |
| 531 | #define IS_MACL_LDS(x) ((x) == 0x4f16) |
| 532 | #define IS_MOV_FP_SP(x) ((x) == 0x6fe3) |
| 533 | #define IS_ADD_REG_TO_FP(x) (((x) & 0xff0f) == 0x3e0c) |
| 534 | #define IS_ADD_IMM_FP(x) (((x) & 0xff00) == 0x7e00) |
| 535 | |
| 536 | static CORE_ADDR |
| 537 | sh_analyze_prologue (struct gdbarch *gdbarch, |
| 538 | CORE_ADDR pc, CORE_ADDR limit_pc, |
| 539 | struct sh_frame_cache *cache, ULONGEST fpscr) |
| 540 | { |
| 541 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 542 | ULONGEST inst; |
| 543 | int offset; |
| 544 | int sav_offset = 0; |
| 545 | int r3_val = 0; |
| 546 | int reg, sav_reg = -1; |
| 547 | |
| 548 | cache->uses_fp = 0; |
| 549 | for (; pc < limit_pc; pc += 2) |
| 550 | { |
| 551 | inst = read_memory_unsigned_integer (pc, 2, byte_order); |
| 552 | /* See where the registers will be saved to. */ |
| 553 | if (IS_PUSH (inst)) |
| 554 | { |
| 555 | cache->saved_regs[GET_SOURCE_REG (inst)] = cache->sp_offset; |
| 556 | cache->sp_offset += 4; |
| 557 | } |
| 558 | else if (IS_STS (inst)) |
| 559 | { |
| 560 | cache->saved_regs[PR_REGNUM] = cache->sp_offset; |
| 561 | cache->sp_offset += 4; |
| 562 | } |
| 563 | else if (IS_MACL_STS (inst)) |
| 564 | { |
| 565 | cache->saved_regs[MACL_REGNUM] = cache->sp_offset; |
| 566 | cache->sp_offset += 4; |
| 567 | } |
| 568 | else if (IS_MOV_R3 (inst)) |
| 569 | { |
| 570 | r3_val = ((inst & 0xff) ^ 0x80) - 0x80; |
| 571 | } |
| 572 | else if (IS_SHLL_R3 (inst)) |
| 573 | { |
| 574 | r3_val <<= 1; |
| 575 | } |
| 576 | else if (IS_ADD_R3SP (inst)) |
| 577 | { |
| 578 | cache->sp_offset += -r3_val; |
| 579 | } |
| 580 | else if (IS_ADD_IMM_SP (inst)) |
| 581 | { |
| 582 | offset = ((inst & 0xff) ^ 0x80) - 0x80; |
| 583 | cache->sp_offset -= offset; |
| 584 | } |
| 585 | else if (IS_MOVW_PCREL_TO_REG (inst)) |
| 586 | { |
| 587 | if (sav_reg < 0) |
| 588 | { |
| 589 | reg = GET_TARGET_REG (inst); |
| 590 | if (reg < 14) |
| 591 | { |
| 592 | sav_reg = reg; |
| 593 | offset = (inst & 0xff) << 1; |
| 594 | sav_offset = |
| 595 | read_memory_integer ((pc + 4) + offset, 2, byte_order); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | else if (IS_MOVL_PCREL_TO_REG (inst)) |
| 600 | { |
| 601 | if (sav_reg < 0) |
| 602 | { |
| 603 | reg = GET_TARGET_REG (inst); |
| 604 | if (reg < 14) |
| 605 | { |
| 606 | sav_reg = reg; |
| 607 | offset = (inst & 0xff) << 2; |
| 608 | sav_offset = |
| 609 | read_memory_integer (((pc & 0xfffffffc) + 4) + offset, |
| 610 | 4, byte_order); |
| 611 | } |
| 612 | } |
| 613 | } |
| 614 | else if (IS_MOVI20 (inst) |
| 615 | && (pc + 2 < limit_pc)) |
| 616 | { |
| 617 | if (sav_reg < 0) |
| 618 | { |
| 619 | reg = GET_TARGET_REG (inst); |
| 620 | if (reg < 14) |
| 621 | { |
| 622 | sav_reg = reg; |
| 623 | sav_offset = GET_SOURCE_REG (inst) << 16; |
| 624 | /* MOVI20 is a 32 bit instruction! */ |
| 625 | pc += 2; |
| 626 | sav_offset |
| 627 | |= read_memory_unsigned_integer (pc, 2, byte_order); |
| 628 | /* Now sav_offset contains an unsigned 20 bit value. |
| 629 | It must still get sign extended. */ |
| 630 | if (sav_offset & 0x00080000) |
| 631 | sav_offset |= 0xfff00000; |
| 632 | } |
| 633 | } |
| 634 | } |
| 635 | else if (IS_SUB_REG_FROM_SP (inst)) |
| 636 | { |
| 637 | reg = GET_SOURCE_REG (inst); |
| 638 | if (sav_reg > 0 && reg == sav_reg) |
| 639 | { |
| 640 | sav_reg = -1; |
| 641 | } |
| 642 | cache->sp_offset += sav_offset; |
| 643 | } |
| 644 | else if (IS_FPUSH (inst)) |
| 645 | { |
| 646 | if (fpscr & FPSCR_SZ) |
| 647 | { |
| 648 | cache->sp_offset += 8; |
| 649 | } |
| 650 | else |
| 651 | { |
| 652 | cache->sp_offset += 4; |
| 653 | } |
| 654 | } |
| 655 | else if (IS_MOV_SP_FP (inst)) |
| 656 | { |
| 657 | pc += 2; |
| 658 | /* Don't go any further than six more instructions. */ |
| 659 | limit_pc = min (limit_pc, pc + (2 * 6)); |
| 660 | |
| 661 | cache->uses_fp = 1; |
| 662 | /* At this point, only allow argument register moves to other |
| 663 | registers or argument register moves to @(X,fp) which are |
| 664 | moving the register arguments onto the stack area allocated |
| 665 | by a former add somenumber to SP call. Don't allow moving |
| 666 | to an fp indirect address above fp + cache->sp_offset. */ |
| 667 | for (; pc < limit_pc; pc += 2) |
| 668 | { |
| 669 | inst = read_memory_integer (pc, 2, byte_order); |
| 670 | if (IS_MOV_ARG_TO_IND_R14 (inst)) |
| 671 | { |
| 672 | reg = GET_SOURCE_REG (inst); |
| 673 | if (cache->sp_offset > 0) |
| 674 | cache->saved_regs[reg] = cache->sp_offset; |
| 675 | } |
| 676 | else if (IS_MOV_ARG_TO_IND_R14_WITH_DISP (inst)) |
| 677 | { |
| 678 | reg = GET_SOURCE_REG (inst); |
| 679 | offset = (inst & 0xf) * 4; |
| 680 | if (cache->sp_offset > offset) |
| 681 | cache->saved_regs[reg] = cache->sp_offset - offset; |
| 682 | } |
| 683 | else if (IS_MOV_ARG_TO_REG (inst)) |
| 684 | continue; |
| 685 | else |
| 686 | break; |
| 687 | } |
| 688 | break; |
| 689 | } |
| 690 | else if (IS_JSR (inst)) |
| 691 | { |
| 692 | /* We have found a jsr that has been scheduled into the prologue. |
| 693 | If we continue the scan and return a pc someplace after this, |
| 694 | then setting a breakpoint on this function will cause it to |
| 695 | appear to be called after the function it is calling via the |
| 696 | jsr, which will be very confusing. Most likely the next |
| 697 | instruction is going to be IS_MOV_SP_FP in the delay slot. If |
| 698 | so, note that before returning the current pc. */ |
| 699 | if (pc + 2 < limit_pc) |
| 700 | { |
| 701 | inst = read_memory_integer (pc + 2, 2, byte_order); |
| 702 | if (IS_MOV_SP_FP (inst)) |
| 703 | cache->uses_fp = 1; |
| 704 | } |
| 705 | break; |
| 706 | } |
| 707 | #if 0 /* This used to just stop when it found an instruction |
| 708 | that was not considered part of the prologue. Now, |
| 709 | we just keep going looking for likely |
| 710 | instructions. */ |
| 711 | else |
| 712 | break; |
| 713 | #endif |
| 714 | } |
| 715 | |
| 716 | return pc; |
| 717 | } |
| 718 | |
| 719 | /* Skip any prologue before the guts of a function. */ |
| 720 | static CORE_ADDR |
| 721 | sh_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 722 | { |
| 723 | CORE_ADDR post_prologue_pc, func_addr, func_end_addr, limit_pc; |
| 724 | struct sh_frame_cache cache; |
| 725 | |
| 726 | /* See if we can determine the end of the prologue via the symbol table. |
| 727 | If so, then return either PC, or the PC after the prologue, whichever |
| 728 | is greater. */ |
| 729 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end_addr)) |
| 730 | { |
| 731 | post_prologue_pc = skip_prologue_using_sal (gdbarch, func_addr); |
| 732 | if (post_prologue_pc != 0) |
| 733 | return max (pc, post_prologue_pc); |
| 734 | } |
| 735 | |
| 736 | /* Can't determine prologue from the symbol table, need to examine |
| 737 | instructions. */ |
| 738 | |
| 739 | /* Find an upper limit on the function prologue using the debug |
| 740 | information. If the debug information could not be used to provide |
| 741 | that bound, then use an arbitrary large number as the upper bound. */ |
| 742 | limit_pc = skip_prologue_using_sal (gdbarch, pc); |
| 743 | if (limit_pc == 0) |
| 744 | /* Don't go any further than 28 instructions. */ |
| 745 | limit_pc = pc + (2 * 28); |
| 746 | |
| 747 | /* Do not allow limit_pc to be past the function end, if we know |
| 748 | where that end is... */ |
| 749 | if (func_end_addr != 0) |
| 750 | limit_pc = min (limit_pc, func_end_addr); |
| 751 | |
| 752 | cache.sp_offset = -4; |
| 753 | post_prologue_pc = sh_analyze_prologue (gdbarch, pc, limit_pc, &cache, 0); |
| 754 | if (cache.uses_fp) |
| 755 | pc = post_prologue_pc; |
| 756 | |
| 757 | return pc; |
| 758 | } |
| 759 | |
| 760 | /* The ABI says: |
| 761 | |
| 762 | Aggregate types not bigger than 8 bytes that have the same size and |
| 763 | alignment as one of the integer scalar types are returned in the |
| 764 | same registers as the integer type they match. |
| 765 | |
| 766 | For example, a 2-byte aligned structure with size 2 bytes has the |
| 767 | same size and alignment as a short int, and will be returned in R0. |
| 768 | A 4-byte aligned structure with size 8 bytes has the same size and |
| 769 | alignment as a long long int, and will be returned in R0 and R1. |
| 770 | |
| 771 | When an aggregate type is returned in R0 and R1, R0 contains the |
| 772 | first four bytes of the aggregate, and R1 contains the |
| 773 | remainder. If the size of the aggregate type is not a multiple of 4 |
| 774 | bytes, the aggregate is tail-padded up to a multiple of 4 |
| 775 | bytes. The value of the padding is undefined. For little-endian |
| 776 | targets the padding will appear at the most significant end of the |
| 777 | last element, for big-endian targets the padding appears at the |
| 778 | least significant end of the last element. |
| 779 | |
| 780 | All other aggregate types are returned by address. The caller |
| 781 | function passes the address of an area large enough to hold the |
| 782 | aggregate value in R2. The called function stores the result in |
| 783 | this location. |
| 784 | |
| 785 | To reiterate, structs smaller than 8 bytes could also be returned |
| 786 | in memory, if they don't pass the "same size and alignment as an |
| 787 | integer type" rule. |
| 788 | |
| 789 | For example, in |
| 790 | |
| 791 | struct s { char c[3]; } wibble; |
| 792 | struct s foo(void) { return wibble; } |
| 793 | |
| 794 | the return value from foo() will be in memory, not |
| 795 | in R0, because there is no 3-byte integer type. |
| 796 | |
| 797 | Similarly, in |
| 798 | |
| 799 | struct s { char c[2]; } wibble; |
| 800 | struct s foo(void) { return wibble; } |
| 801 | |
| 802 | because a struct containing two chars has alignment 1, that matches |
| 803 | type char, but size 2, that matches type short. There's no integer |
| 804 | type that has alignment 1 and size 2, so the struct is returned in |
| 805 | memory. */ |
| 806 | |
| 807 | static int |
| 808 | sh_use_struct_convention (int renesas_abi, struct type *type) |
| 809 | { |
| 810 | int len = TYPE_LENGTH (type); |
| 811 | int nelem = TYPE_NFIELDS (type); |
| 812 | |
| 813 | /* The Renesas ABI returns aggregate types always on stack. */ |
| 814 | if (renesas_abi && (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 815 | || TYPE_CODE (type) == TYPE_CODE_UNION)) |
| 816 | return 1; |
| 817 | |
| 818 | /* Non-power of 2 length types and types bigger than 8 bytes (which don't |
| 819 | fit in two registers anyway) use struct convention. */ |
| 820 | if (len != 1 && len != 2 && len != 4 && len != 8) |
| 821 | return 1; |
| 822 | |
| 823 | /* Scalar types and aggregate types with exactly one field are aligned |
| 824 | by definition. They are returned in registers. */ |
| 825 | if (nelem <= 1) |
| 826 | return 0; |
| 827 | |
| 828 | /* If the first field in the aggregate has the same length as the entire |
| 829 | aggregate type, the type is returned in registers. */ |
| 830 | if (TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == len) |
| 831 | return 0; |
| 832 | |
| 833 | /* If the size of the aggregate is 8 bytes and the first field is |
| 834 | of size 4 bytes its alignment is equal to long long's alignment, |
| 835 | so it's returned in registers. */ |
| 836 | if (len == 8 && TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4) |
| 837 | return 0; |
| 838 | |
| 839 | /* Otherwise use struct convention. */ |
| 840 | return 1; |
| 841 | } |
| 842 | |
| 843 | static int |
| 844 | sh_use_struct_convention_nofpu (int renesas_abi, struct type *type) |
| 845 | { |
| 846 | /* The Renesas ABI returns long longs/doubles etc. always on stack. */ |
| 847 | if (renesas_abi && TYPE_NFIELDS (type) == 0 && TYPE_LENGTH (type) >= 8) |
| 848 | return 1; |
| 849 | return sh_use_struct_convention (renesas_abi, type); |
| 850 | } |
| 851 | |
| 852 | static CORE_ADDR |
| 853 | sh_frame_align (struct gdbarch *ignore, CORE_ADDR sp) |
| 854 | { |
| 855 | return sp & ~3; |
| 856 | } |
| 857 | |
| 858 | /* Function: push_dummy_call (formerly push_arguments) |
| 859 | Setup the function arguments for calling a function in the inferior. |
| 860 | |
| 861 | On the Renesas SH architecture, there are four registers (R4 to R7) |
| 862 | which are dedicated for passing function arguments. Up to the first |
| 863 | four arguments (depending on size) may go into these registers. |
| 864 | The rest go on the stack. |
| 865 | |
| 866 | MVS: Except on SH variants that have floating point registers. |
| 867 | In that case, float and double arguments are passed in the same |
| 868 | manner, but using FP registers instead of GP registers. |
| 869 | |
| 870 | Arguments that are smaller than 4 bytes will still take up a whole |
| 871 | register or a whole 32-bit word on the stack, and will be |
| 872 | right-justified in the register or the stack word. This includes |
| 873 | chars, shorts, and small aggregate types. |
| 874 | |
| 875 | Arguments that are larger than 4 bytes may be split between two or |
| 876 | more registers. If there are not enough registers free, an argument |
| 877 | may be passed partly in a register (or registers), and partly on the |
| 878 | stack. This includes doubles, long longs, and larger aggregates. |
| 879 | As far as I know, there is no upper limit to the size of aggregates |
| 880 | that will be passed in this way; in other words, the convention of |
| 881 | passing a pointer to a large aggregate instead of a copy is not used. |
| 882 | |
| 883 | MVS: The above appears to be true for the SH variants that do not |
| 884 | have an FPU, however those that have an FPU appear to copy the |
| 885 | aggregate argument onto the stack (and not place it in registers) |
| 886 | if it is larger than 16 bytes (four GP registers). |
| 887 | |
| 888 | An exceptional case exists for struct arguments (and possibly other |
| 889 | aggregates such as arrays) if the size is larger than 4 bytes but |
| 890 | not a multiple of 4 bytes. In this case the argument is never split |
| 891 | between the registers and the stack, but instead is copied in its |
| 892 | entirety onto the stack, AND also copied into as many registers as |
| 893 | there is room for. In other words, space in registers permitting, |
| 894 | two copies of the same argument are passed in. As far as I can tell, |
| 895 | only the one on the stack is used, although that may be a function |
| 896 | of the level of compiler optimization. I suspect this is a compiler |
| 897 | bug. Arguments of these odd sizes are left-justified within the |
| 898 | word (as opposed to arguments smaller than 4 bytes, which are |
| 899 | right-justified). |
| 900 | |
| 901 | If the function is to return an aggregate type such as a struct, it |
| 902 | is either returned in the normal return value register R0 (if its |
| 903 | size is no greater than one byte), or else the caller must allocate |
| 904 | space into which the callee will copy the return value (if the size |
| 905 | is greater than one byte). In this case, a pointer to the return |
| 906 | value location is passed into the callee in register R2, which does |
| 907 | not displace any of the other arguments passed in via registers R4 |
| 908 | to R7. */ |
| 909 | |
| 910 | /* Helper function to justify value in register according to endianess. */ |
| 911 | static const gdb_byte * |
| 912 | sh_justify_value_in_reg (struct gdbarch *gdbarch, struct value *val, int len) |
| 913 | { |
| 914 | static gdb_byte valbuf[4]; |
| 915 | |
| 916 | memset (valbuf, 0, sizeof (valbuf)); |
| 917 | if (len < 4) |
| 918 | { |
| 919 | /* value gets right-justified in the register or stack word. */ |
| 920 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 921 | memcpy (valbuf + (4 - len), value_contents (val), len); |
| 922 | else |
| 923 | memcpy (valbuf, value_contents (val), len); |
| 924 | return valbuf; |
| 925 | } |
| 926 | return value_contents (val); |
| 927 | } |
| 928 | |
| 929 | /* Helper function to eval number of bytes to allocate on stack. */ |
| 930 | static CORE_ADDR |
| 931 | sh_stack_allocsize (int nargs, struct value **args) |
| 932 | { |
| 933 | int stack_alloc = 0; |
| 934 | while (nargs-- > 0) |
| 935 | stack_alloc += ((TYPE_LENGTH (value_type (args[nargs])) + 3) & ~3); |
| 936 | return stack_alloc; |
| 937 | } |
| 938 | |
| 939 | /* Helper functions for getting the float arguments right. Registers usage |
| 940 | depends on the ABI and the endianess. The comments should enlighten how |
| 941 | it's intended to work. */ |
| 942 | |
| 943 | /* This array stores which of the float arg registers are already in use. */ |
| 944 | static int flt_argreg_array[FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM + 1]; |
| 945 | |
| 946 | /* This function just resets the above array to "no reg used so far". */ |
| 947 | static void |
| 948 | sh_init_flt_argreg (void) |
| 949 | { |
| 950 | memset (flt_argreg_array, 0, sizeof flt_argreg_array); |
| 951 | } |
| 952 | |
| 953 | /* This function returns the next register to use for float arg passing. |
| 954 | It returns either a valid value between FLOAT_ARG0_REGNUM and |
| 955 | FLOAT_ARGLAST_REGNUM if a register is available, otherwise it returns |
| 956 | FLOAT_ARGLAST_REGNUM + 1 to indicate that no register is available. |
| 957 | |
| 958 | Note that register number 0 in flt_argreg_array corresponds with the |
| 959 | real float register fr4. In contrast to FLOAT_ARG0_REGNUM (value is |
| 960 | 29) the parity of the register number is preserved, which is important |
| 961 | for the double register passing test (see the "argreg & 1" test below). */ |
| 962 | static int |
| 963 | sh_next_flt_argreg (struct gdbarch *gdbarch, int len, struct type *func_type) |
| 964 | { |
| 965 | int argreg; |
| 966 | |
| 967 | /* First search for the next free register. */ |
| 968 | for (argreg = 0; argreg <= FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM; |
| 969 | ++argreg) |
| 970 | if (!flt_argreg_array[argreg]) |
| 971 | break; |
| 972 | |
| 973 | /* No register left? */ |
| 974 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 975 | return FLOAT_ARGLAST_REGNUM + 1; |
| 976 | |
| 977 | if (len == 8) |
| 978 | { |
| 979 | /* Doubles are always starting in a even register number. */ |
| 980 | if (argreg & 1) |
| 981 | { |
| 982 | /* In gcc ABI, the skipped register is lost for further argument |
| 983 | passing now. Not so in Renesas ABI. */ |
| 984 | if (!sh_is_renesas_calling_convention (func_type)) |
| 985 | flt_argreg_array[argreg] = 1; |
| 986 | |
| 987 | ++argreg; |
| 988 | |
| 989 | /* No register left? */ |
| 990 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 991 | return FLOAT_ARGLAST_REGNUM + 1; |
| 992 | } |
| 993 | /* Also mark the next register as used. */ |
| 994 | flt_argreg_array[argreg + 1] = 1; |
| 995 | } |
| 996 | else if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE |
| 997 | && !sh_is_renesas_calling_convention (func_type)) |
| 998 | { |
| 999 | /* In little endian, gcc passes floats like this: f5, f4, f7, f6, ... */ |
| 1000 | if (!flt_argreg_array[argreg + 1]) |
| 1001 | ++argreg; |
| 1002 | } |
| 1003 | flt_argreg_array[argreg] = 1; |
| 1004 | return FLOAT_ARG0_REGNUM + argreg; |
| 1005 | } |
| 1006 | |
| 1007 | /* Helper function which figures out, if a type is treated like a float type. |
| 1008 | |
| 1009 | The FPU ABIs have a special way how to treat types as float types. |
| 1010 | Structures with exactly one member, which is of type float or double, are |
| 1011 | treated exactly as the base types float or double: |
| 1012 | |
| 1013 | struct sf { |
| 1014 | float f; |
| 1015 | }; |
| 1016 | |
| 1017 | struct sd { |
| 1018 | double d; |
| 1019 | }; |
| 1020 | |
| 1021 | are handled the same way as just |
| 1022 | |
| 1023 | float f; |
| 1024 | |
| 1025 | double d; |
| 1026 | |
| 1027 | As a result, arguments of these struct types are pushed into floating point |
| 1028 | registers exactly as floats or doubles, using the same decision algorithm. |
| 1029 | |
| 1030 | The same is valid if these types are used as function return types. The |
| 1031 | above structs are returned in fr0 resp. fr0,fr1 instead of in r0, r0,r1 |
| 1032 | or even using struct convention as it is for other structs. */ |
| 1033 | |
| 1034 | static int |
| 1035 | sh_treat_as_flt_p (struct type *type) |
| 1036 | { |
| 1037 | /* Ordinary float types are obviously treated as float. */ |
| 1038 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1039 | return 1; |
| 1040 | /* Otherwise non-struct types are not treated as float. */ |
| 1041 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT) |
| 1042 | return 0; |
| 1043 | /* Otherwise structs with more than one memeber are not treated as float. */ |
| 1044 | if (TYPE_NFIELDS (type) != 1) |
| 1045 | return 0; |
| 1046 | /* Otherwise if the type of that member is float, the whole type is |
| 1047 | treated as float. */ |
| 1048 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_FLT) |
| 1049 | return 1; |
| 1050 | /* Otherwise it's not treated as float. */ |
| 1051 | return 0; |
| 1052 | } |
| 1053 | |
| 1054 | static CORE_ADDR |
| 1055 | sh_push_dummy_call_fpu (struct gdbarch *gdbarch, |
| 1056 | struct value *function, |
| 1057 | struct regcache *regcache, |
| 1058 | CORE_ADDR bp_addr, int nargs, |
| 1059 | struct value **args, |
| 1060 | CORE_ADDR sp, int struct_return, |
| 1061 | CORE_ADDR struct_addr) |
| 1062 | { |
| 1063 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1064 | int stack_offset = 0; |
| 1065 | int argreg = ARG0_REGNUM; |
| 1066 | int flt_argreg = 0; |
| 1067 | int argnum; |
| 1068 | struct type *func_type = value_type (function); |
| 1069 | struct type *type; |
| 1070 | CORE_ADDR regval; |
| 1071 | const gdb_byte *val; |
| 1072 | int len, reg_size = 0; |
| 1073 | int pass_on_stack = 0; |
| 1074 | int treat_as_flt; |
| 1075 | int last_reg_arg = INT_MAX; |
| 1076 | |
| 1077 | /* The Renesas ABI expects all varargs arguments, plus the last |
| 1078 | non-vararg argument to be on the stack, no matter how many |
| 1079 | registers have been used so far. */ |
| 1080 | if (sh_is_renesas_calling_convention (func_type) |
| 1081 | && TYPE_VARARGS (func_type)) |
| 1082 | last_reg_arg = TYPE_NFIELDS (func_type) - 2; |
| 1083 | |
| 1084 | /* First force sp to a 4-byte alignment. */ |
| 1085 | sp = sh_frame_align (gdbarch, sp); |
| 1086 | |
| 1087 | /* Make room on stack for args. */ |
| 1088 | sp -= sh_stack_allocsize (nargs, args); |
| 1089 | |
| 1090 | /* Initialize float argument mechanism. */ |
| 1091 | sh_init_flt_argreg (); |
| 1092 | |
| 1093 | /* Now load as many as possible of the first arguments into |
| 1094 | registers, and push the rest onto the stack. There are 16 bytes |
| 1095 | in four registers available. Loop thru args from first to last. */ |
| 1096 | for (argnum = 0; argnum < nargs; argnum++) |
| 1097 | { |
| 1098 | type = value_type (args[argnum]); |
| 1099 | len = TYPE_LENGTH (type); |
| 1100 | val = sh_justify_value_in_reg (gdbarch, args[argnum], len); |
| 1101 | |
| 1102 | /* Some decisions have to be made how various types are handled. |
| 1103 | This also differs in different ABIs. */ |
| 1104 | pass_on_stack = 0; |
| 1105 | |
| 1106 | /* Find out the next register to use for a floating point value. */ |
| 1107 | treat_as_flt = sh_treat_as_flt_p (type); |
| 1108 | if (treat_as_flt) |
| 1109 | flt_argreg = sh_next_flt_argreg (gdbarch, len, func_type); |
| 1110 | /* In Renesas ABI, long longs and aggregate types are always passed |
| 1111 | on stack. */ |
| 1112 | else if (sh_is_renesas_calling_convention (func_type) |
| 1113 | && ((TYPE_CODE (type) == TYPE_CODE_INT && len == 8) |
| 1114 | || TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 1115 | || TYPE_CODE (type) == TYPE_CODE_UNION)) |
| 1116 | pass_on_stack = 1; |
| 1117 | /* In contrast to non-FPU CPUs, arguments are never split between |
| 1118 | registers and stack. If an argument doesn't fit in the remaining |
| 1119 | registers it's always pushed entirely on the stack. */ |
| 1120 | else if (len > ((ARGLAST_REGNUM - argreg + 1) * 4)) |
| 1121 | pass_on_stack = 1; |
| 1122 | |
| 1123 | while (len > 0) |
| 1124 | { |
| 1125 | if ((treat_as_flt && flt_argreg > FLOAT_ARGLAST_REGNUM) |
| 1126 | || (!treat_as_flt && (argreg > ARGLAST_REGNUM |
| 1127 | || pass_on_stack)) |
| 1128 | || argnum > last_reg_arg) |
| 1129 | { |
| 1130 | /* The data goes entirely on the stack, 4-byte aligned. */ |
| 1131 | reg_size = (len + 3) & ~3; |
| 1132 | write_memory (sp + stack_offset, val, reg_size); |
| 1133 | stack_offset += reg_size; |
| 1134 | } |
| 1135 | else if (treat_as_flt && flt_argreg <= FLOAT_ARGLAST_REGNUM) |
| 1136 | { |
| 1137 | /* Argument goes in a float argument register. */ |
| 1138 | reg_size = register_size (gdbarch, flt_argreg); |
| 1139 | regval = extract_unsigned_integer (val, reg_size, byte_order); |
| 1140 | /* In little endian mode, float types taking two registers |
| 1141 | (doubles on sh4, long doubles on sh2e, sh3e and sh4) must |
| 1142 | be stored swapped in the argument registers. The below |
| 1143 | code first writes the first 32 bits in the next but one |
| 1144 | register, increments the val and len values accordingly |
| 1145 | and then proceeds as normal by writing the second 32 bits |
| 1146 | into the next register. */ |
| 1147 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE |
| 1148 | && TYPE_LENGTH (type) == 2 * reg_size) |
| 1149 | { |
| 1150 | regcache_cooked_write_unsigned (regcache, flt_argreg + 1, |
| 1151 | regval); |
| 1152 | val += reg_size; |
| 1153 | len -= reg_size; |
| 1154 | regval = extract_unsigned_integer (val, reg_size, |
| 1155 | byte_order); |
| 1156 | } |
| 1157 | regcache_cooked_write_unsigned (regcache, flt_argreg++, regval); |
| 1158 | } |
| 1159 | else if (!treat_as_flt && argreg <= ARGLAST_REGNUM) |
| 1160 | { |
| 1161 | /* there's room in a register */ |
| 1162 | reg_size = register_size (gdbarch, argreg); |
| 1163 | regval = extract_unsigned_integer (val, reg_size, byte_order); |
| 1164 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 1165 | } |
| 1166 | /* Store the value one register at a time or in one step on |
| 1167 | stack. */ |
| 1168 | len -= reg_size; |
| 1169 | val += reg_size; |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | if (struct_return) |
| 1174 | { |
| 1175 | if (sh_is_renesas_calling_convention (func_type)) |
| 1176 | /* If the function uses the Renesas ABI, subtract another 4 bytes from |
| 1177 | the stack and store the struct return address there. */ |
| 1178 | write_memory_unsigned_integer (sp -= 4, 4, byte_order, struct_addr); |
| 1179 | else |
| 1180 | /* Using the gcc ABI, the "struct return pointer" pseudo-argument has |
| 1181 | its own dedicated register. */ |
| 1182 | regcache_cooked_write_unsigned (regcache, |
| 1183 | STRUCT_RETURN_REGNUM, struct_addr); |
| 1184 | } |
| 1185 | |
| 1186 | /* Store return address. */ |
| 1187 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 1188 | |
| 1189 | /* Update stack pointer. */ |
| 1190 | regcache_cooked_write_unsigned (regcache, |
| 1191 | gdbarch_sp_regnum (gdbarch), sp); |
| 1192 | |
| 1193 | return sp; |
| 1194 | } |
| 1195 | |
| 1196 | static CORE_ADDR |
| 1197 | sh_push_dummy_call_nofpu (struct gdbarch *gdbarch, |
| 1198 | struct value *function, |
| 1199 | struct regcache *regcache, |
| 1200 | CORE_ADDR bp_addr, |
| 1201 | int nargs, struct value **args, |
| 1202 | CORE_ADDR sp, int struct_return, |
| 1203 | CORE_ADDR struct_addr) |
| 1204 | { |
| 1205 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1206 | int stack_offset = 0; |
| 1207 | int argreg = ARG0_REGNUM; |
| 1208 | int argnum; |
| 1209 | struct type *func_type = value_type (function); |
| 1210 | struct type *type; |
| 1211 | CORE_ADDR regval; |
| 1212 | const gdb_byte *val; |
| 1213 | int len, reg_size = 0; |
| 1214 | int pass_on_stack = 0; |
| 1215 | int last_reg_arg = INT_MAX; |
| 1216 | |
| 1217 | /* The Renesas ABI expects all varargs arguments, plus the last |
| 1218 | non-vararg argument to be on the stack, no matter how many |
| 1219 | registers have been used so far. */ |
| 1220 | if (sh_is_renesas_calling_convention (func_type) |
| 1221 | && TYPE_VARARGS (func_type)) |
| 1222 | last_reg_arg = TYPE_NFIELDS (func_type) - 2; |
| 1223 | |
| 1224 | /* First force sp to a 4-byte alignment. */ |
| 1225 | sp = sh_frame_align (gdbarch, sp); |
| 1226 | |
| 1227 | /* Make room on stack for args. */ |
| 1228 | sp -= sh_stack_allocsize (nargs, args); |
| 1229 | |
| 1230 | /* Now load as many as possible of the first arguments into |
| 1231 | registers, and push the rest onto the stack. There are 16 bytes |
| 1232 | in four registers available. Loop thru args from first to last. */ |
| 1233 | for (argnum = 0; argnum < nargs; argnum++) |
| 1234 | { |
| 1235 | type = value_type (args[argnum]); |
| 1236 | len = TYPE_LENGTH (type); |
| 1237 | val = sh_justify_value_in_reg (gdbarch, args[argnum], len); |
| 1238 | |
| 1239 | /* Some decisions have to be made how various types are handled. |
| 1240 | This also differs in different ABIs. */ |
| 1241 | pass_on_stack = 0; |
| 1242 | /* Renesas ABI pushes doubles and long longs entirely on stack. |
| 1243 | Same goes for aggregate types. */ |
| 1244 | if (sh_is_renesas_calling_convention (func_type) |
| 1245 | && ((TYPE_CODE (type) == TYPE_CODE_INT && len >= 8) |
| 1246 | || (TYPE_CODE (type) == TYPE_CODE_FLT && len >= 8) |
| 1247 | || TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 1248 | || TYPE_CODE (type) == TYPE_CODE_UNION)) |
| 1249 | pass_on_stack = 1; |
| 1250 | while (len > 0) |
| 1251 | { |
| 1252 | if (argreg > ARGLAST_REGNUM || pass_on_stack |
| 1253 | || argnum > last_reg_arg) |
| 1254 | { |
| 1255 | /* The remainder of the data goes entirely on the stack, |
| 1256 | 4-byte aligned. */ |
| 1257 | reg_size = (len + 3) & ~3; |
| 1258 | write_memory (sp + stack_offset, val, reg_size); |
| 1259 | stack_offset += reg_size; |
| 1260 | } |
| 1261 | else if (argreg <= ARGLAST_REGNUM) |
| 1262 | { |
| 1263 | /* There's room in a register. */ |
| 1264 | reg_size = register_size (gdbarch, argreg); |
| 1265 | regval = extract_unsigned_integer (val, reg_size, byte_order); |
| 1266 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 1267 | } |
| 1268 | /* Store the value reg_size bytes at a time. This means that things |
| 1269 | larger than reg_size bytes may go partly in registers and partly |
| 1270 | on the stack. */ |
| 1271 | len -= reg_size; |
| 1272 | val += reg_size; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | if (struct_return) |
| 1277 | { |
| 1278 | if (sh_is_renesas_calling_convention (func_type)) |
| 1279 | /* If the function uses the Renesas ABI, subtract another 4 bytes from |
| 1280 | the stack and store the struct return address there. */ |
| 1281 | write_memory_unsigned_integer (sp -= 4, 4, byte_order, struct_addr); |
| 1282 | else |
| 1283 | /* Using the gcc ABI, the "struct return pointer" pseudo-argument has |
| 1284 | its own dedicated register. */ |
| 1285 | regcache_cooked_write_unsigned (regcache, |
| 1286 | STRUCT_RETURN_REGNUM, struct_addr); |
| 1287 | } |
| 1288 | |
| 1289 | /* Store return address. */ |
| 1290 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 1291 | |
| 1292 | /* Update stack pointer. */ |
| 1293 | regcache_cooked_write_unsigned (regcache, |
| 1294 | gdbarch_sp_regnum (gdbarch), sp); |
| 1295 | |
| 1296 | return sp; |
| 1297 | } |
| 1298 | |
| 1299 | /* Find a function's return value in the appropriate registers (in |
| 1300 | regbuf), and copy it into valbuf. Extract from an array REGBUF |
| 1301 | containing the (raw) register state a function return value of type |
| 1302 | TYPE, and copy that, in virtual format, into VALBUF. */ |
| 1303 | static void |
| 1304 | sh_extract_return_value_nofpu (struct type *type, struct regcache *regcache, |
| 1305 | gdb_byte *valbuf) |
| 1306 | { |
| 1307 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1308 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1309 | int len = TYPE_LENGTH (type); |
| 1310 | int return_register = R0_REGNUM; |
| 1311 | int offset; |
| 1312 | |
| 1313 | if (len <= 4) |
| 1314 | { |
| 1315 | ULONGEST c; |
| 1316 | |
| 1317 | regcache_cooked_read_unsigned (regcache, R0_REGNUM, &c); |
| 1318 | store_unsigned_integer (valbuf, len, byte_order, c); |
| 1319 | } |
| 1320 | else if (len == 8) |
| 1321 | { |
| 1322 | int i, regnum = R0_REGNUM; |
| 1323 | for (i = 0; i < len; i += 4) |
| 1324 | regcache_raw_read (regcache, regnum++, valbuf + i); |
| 1325 | } |
| 1326 | else |
| 1327 | error (_("bad size for return value")); |
| 1328 | } |
| 1329 | |
| 1330 | static void |
| 1331 | sh_extract_return_value_fpu (struct type *type, struct regcache *regcache, |
| 1332 | gdb_byte *valbuf) |
| 1333 | { |
| 1334 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1335 | if (sh_treat_as_flt_p (type)) |
| 1336 | { |
| 1337 | int len = TYPE_LENGTH (type); |
| 1338 | int i, regnum = gdbarch_fp0_regnum (gdbarch); |
| 1339 | for (i = 0; i < len; i += 4) |
| 1340 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 1341 | regcache_raw_read (regcache, regnum++, |
| 1342 | valbuf + len - 4 - i); |
| 1343 | else |
| 1344 | regcache_raw_read (regcache, regnum++, valbuf + i); |
| 1345 | } |
| 1346 | else |
| 1347 | sh_extract_return_value_nofpu (type, regcache, valbuf); |
| 1348 | } |
| 1349 | |
| 1350 | /* Write into appropriate registers a function return value |
| 1351 | of type TYPE, given in virtual format. |
| 1352 | If the architecture is sh4 or sh3e, store a function's return value |
| 1353 | in the R0 general register or in the FP0 floating point register, |
| 1354 | depending on the type of the return value. In all the other cases |
| 1355 | the result is stored in r0, left-justified. */ |
| 1356 | static void |
| 1357 | sh_store_return_value_nofpu (struct type *type, struct regcache *regcache, |
| 1358 | const gdb_byte *valbuf) |
| 1359 | { |
| 1360 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1361 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1362 | ULONGEST val; |
| 1363 | int len = TYPE_LENGTH (type); |
| 1364 | |
| 1365 | if (len <= 4) |
| 1366 | { |
| 1367 | val = extract_unsigned_integer (valbuf, len, byte_order); |
| 1368 | regcache_cooked_write_unsigned (regcache, R0_REGNUM, val); |
| 1369 | } |
| 1370 | else |
| 1371 | { |
| 1372 | int i, regnum = R0_REGNUM; |
| 1373 | for (i = 0; i < len; i += 4) |
| 1374 | regcache_raw_write (regcache, regnum++, valbuf + i); |
| 1375 | } |
| 1376 | } |
| 1377 | |
| 1378 | static void |
| 1379 | sh_store_return_value_fpu (struct type *type, struct regcache *regcache, |
| 1380 | const gdb_byte *valbuf) |
| 1381 | { |
| 1382 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1383 | if (sh_treat_as_flt_p (type)) |
| 1384 | { |
| 1385 | int len = TYPE_LENGTH (type); |
| 1386 | int i, regnum = gdbarch_fp0_regnum (gdbarch); |
| 1387 | for (i = 0; i < len; i += 4) |
| 1388 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_LITTLE) |
| 1389 | regcache_raw_write (regcache, regnum++, |
| 1390 | valbuf + len - 4 - i); |
| 1391 | else |
| 1392 | regcache_raw_write (regcache, regnum++, valbuf + i); |
| 1393 | } |
| 1394 | else |
| 1395 | sh_store_return_value_nofpu (type, regcache, valbuf); |
| 1396 | } |
| 1397 | |
| 1398 | static enum return_value_convention |
| 1399 | sh_return_value_nofpu (struct gdbarch *gdbarch, struct value *function, |
| 1400 | struct type *type, struct regcache *regcache, |
| 1401 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 1402 | { |
| 1403 | struct type *func_type = function ? value_type (function) : NULL; |
| 1404 | |
| 1405 | if (sh_use_struct_convention_nofpu ( |
| 1406 | sh_is_renesas_calling_convention (func_type), type)) |
| 1407 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 1408 | if (writebuf) |
| 1409 | sh_store_return_value_nofpu (type, regcache, writebuf); |
| 1410 | else if (readbuf) |
| 1411 | sh_extract_return_value_nofpu (type, regcache, readbuf); |
| 1412 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1413 | } |
| 1414 | |
| 1415 | static enum return_value_convention |
| 1416 | sh_return_value_fpu (struct gdbarch *gdbarch, struct value *function, |
| 1417 | struct type *type, struct regcache *regcache, |
| 1418 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 1419 | { |
| 1420 | struct type *func_type = function ? value_type (function) : NULL; |
| 1421 | |
| 1422 | if (sh_use_struct_convention ( |
| 1423 | sh_is_renesas_calling_convention (func_type), type)) |
| 1424 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 1425 | if (writebuf) |
| 1426 | sh_store_return_value_fpu (type, regcache, writebuf); |
| 1427 | else if (readbuf) |
| 1428 | sh_extract_return_value_fpu (type, regcache, readbuf); |
| 1429 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1430 | } |
| 1431 | |
| 1432 | static struct type * |
| 1433 | sh_sh2a_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1434 | { |
| 1435 | if ((reg_nr >= gdbarch_fp0_regnum (gdbarch) |
| 1436 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1437 | return builtin_type (gdbarch)->builtin_float; |
| 1438 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1439 | return builtin_type (gdbarch)->builtin_double; |
| 1440 | else |
| 1441 | return builtin_type (gdbarch)->builtin_int; |
| 1442 | } |
| 1443 | |
| 1444 | /* Return the GDB type object for the "standard" data type |
| 1445 | of data in register N. */ |
| 1446 | static struct type * |
| 1447 | sh_sh3e_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1448 | { |
| 1449 | if ((reg_nr >= gdbarch_fp0_regnum (gdbarch) |
| 1450 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1451 | return builtin_type (gdbarch)->builtin_float; |
| 1452 | else |
| 1453 | return builtin_type (gdbarch)->builtin_int; |
| 1454 | } |
| 1455 | |
| 1456 | static struct type * |
| 1457 | sh_sh4_build_float_register_type (struct gdbarch *gdbarch, int high) |
| 1458 | { |
| 1459 | return lookup_array_range_type (builtin_type (gdbarch)->builtin_float, |
| 1460 | 0, high); |
| 1461 | } |
| 1462 | |
| 1463 | static struct type * |
| 1464 | sh_sh4_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1465 | { |
| 1466 | if ((reg_nr >= gdbarch_fp0_regnum (gdbarch) |
| 1467 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1468 | return builtin_type (gdbarch)->builtin_float; |
| 1469 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1470 | return builtin_type (gdbarch)->builtin_double; |
| 1471 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1472 | return sh_sh4_build_float_register_type (gdbarch, 3); |
| 1473 | else |
| 1474 | return builtin_type (gdbarch)->builtin_int; |
| 1475 | } |
| 1476 | |
| 1477 | static struct type * |
| 1478 | sh_default_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1479 | { |
| 1480 | return builtin_type (gdbarch)->builtin_int; |
| 1481 | } |
| 1482 | |
| 1483 | /* Is a register in a reggroup? |
| 1484 | The default code in reggroup.c doesn't identify system registers, some |
| 1485 | float registers or any of the vector registers. |
| 1486 | TODO: sh2a and dsp registers. */ |
| 1487 | static int |
| 1488 | sh_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
| 1489 | struct reggroup *reggroup) |
| 1490 | { |
| 1491 | if (gdbarch_register_name (gdbarch, regnum) == NULL |
| 1492 | || *gdbarch_register_name (gdbarch, regnum) == '\0') |
| 1493 | return 0; |
| 1494 | |
| 1495 | if (reggroup == float_reggroup |
| 1496 | && (regnum == FPUL_REGNUM |
| 1497 | || regnum == FPSCR_REGNUM)) |
| 1498 | return 1; |
| 1499 | |
| 1500 | if (regnum >= FV0_REGNUM && regnum <= FV_LAST_REGNUM) |
| 1501 | { |
| 1502 | if (reggroup == vector_reggroup || reggroup == float_reggroup) |
| 1503 | return 1; |
| 1504 | if (reggroup == general_reggroup) |
| 1505 | return 0; |
| 1506 | } |
| 1507 | |
| 1508 | if (regnum == VBR_REGNUM |
| 1509 | || regnum == SR_REGNUM |
| 1510 | || regnum == FPSCR_REGNUM |
| 1511 | || regnum == SSR_REGNUM |
| 1512 | || regnum == SPC_REGNUM) |
| 1513 | { |
| 1514 | if (reggroup == system_reggroup) |
| 1515 | return 1; |
| 1516 | if (reggroup == general_reggroup) |
| 1517 | return 0; |
| 1518 | } |
| 1519 | |
| 1520 | /* The default code can cope with any other registers. */ |
| 1521 | return default_register_reggroup_p (gdbarch, regnum, reggroup); |
| 1522 | } |
| 1523 | |
| 1524 | /* On the sh4, the DRi pseudo registers are problematic if the target |
| 1525 | is little endian. When the user writes one of those registers, for |
| 1526 | instance with 'set var $dr0=1', we want the double to be stored |
| 1527 | like this: |
| 1528 | fr0 = 0x00 0x00 0xf0 0x3f |
| 1529 | fr1 = 0x00 0x00 0x00 0x00 |
| 1530 | |
| 1531 | This corresponds to little endian byte order & big endian word |
| 1532 | order. However if we let gdb write the register w/o conversion, it |
| 1533 | will write fr0 and fr1 this way: |
| 1534 | fr0 = 0x00 0x00 0x00 0x00 |
| 1535 | fr1 = 0x00 0x00 0xf0 0x3f |
| 1536 | because it will consider fr0 and fr1 as a single LE stretch of memory. |
| 1537 | |
| 1538 | To achieve what we want we must force gdb to store things in |
| 1539 | floatformat_ieee_double_littlebyte_bigword (which is defined in |
| 1540 | include/floatformat.h and libiberty/floatformat.c. |
| 1541 | |
| 1542 | In case the target is big endian, there is no problem, the |
| 1543 | raw bytes will look like: |
| 1544 | fr0 = 0x3f 0xf0 0x00 0x00 |
| 1545 | fr1 = 0x00 0x00 0x00 0x00 |
| 1546 | |
| 1547 | The other pseudo registers (the FVs) also don't pose a problem |
| 1548 | because they are stored as 4 individual FP elements. */ |
| 1549 | |
| 1550 | static void |
| 1551 | sh_register_convert_to_virtual (struct gdbarch *gdbarch, int regnum, |
| 1552 | struct type *type, gdb_byte *from, gdb_byte *to) |
| 1553 | { |
| 1554 | if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_LITTLE) |
| 1555 | { |
| 1556 | /* It is a no-op. */ |
| 1557 | memcpy (to, from, register_size (gdbarch, regnum)); |
| 1558 | return; |
| 1559 | } |
| 1560 | |
| 1561 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1562 | { |
| 1563 | DOUBLEST val; |
| 1564 | floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1565 | from, &val); |
| 1566 | store_typed_floating (to, type, val); |
| 1567 | } |
| 1568 | else |
| 1569 | error |
| 1570 | ("sh_register_convert_to_virtual called with non DR register number"); |
| 1571 | } |
| 1572 | |
| 1573 | static void |
| 1574 | sh_register_convert_to_raw (struct gdbarch *gdbarch, struct type *type, |
| 1575 | int regnum, const gdb_byte *from, gdb_byte *to) |
| 1576 | { |
| 1577 | if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_LITTLE) |
| 1578 | { |
| 1579 | /* It is a no-op. */ |
| 1580 | memcpy (to, from, register_size (gdbarch, regnum)); |
| 1581 | return; |
| 1582 | } |
| 1583 | |
| 1584 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1585 | { |
| 1586 | DOUBLEST val = extract_typed_floating (from, type); |
| 1587 | floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1588 | &val, to); |
| 1589 | } |
| 1590 | else |
| 1591 | error (_("sh_register_convert_to_raw called with non DR register number")); |
| 1592 | } |
| 1593 | |
| 1594 | /* For vectors of 4 floating point registers. */ |
| 1595 | static int |
| 1596 | fv_reg_base_num (struct gdbarch *gdbarch, int fv_regnum) |
| 1597 | { |
| 1598 | int fp_regnum; |
| 1599 | |
| 1600 | fp_regnum = gdbarch_fp0_regnum (gdbarch) |
| 1601 | + (fv_regnum - FV0_REGNUM) * 4; |
| 1602 | return fp_regnum; |
| 1603 | } |
| 1604 | |
| 1605 | /* For double precision floating point registers, i.e 2 fp regs. */ |
| 1606 | static int |
| 1607 | dr_reg_base_num (struct gdbarch *gdbarch, int dr_regnum) |
| 1608 | { |
| 1609 | int fp_regnum; |
| 1610 | |
| 1611 | fp_regnum = gdbarch_fp0_regnum (gdbarch) |
| 1612 | + (dr_regnum - DR0_REGNUM) * 2; |
| 1613 | return fp_regnum; |
| 1614 | } |
| 1615 | |
| 1616 | /* Concatenate PORTIONS contiguous raw registers starting at |
| 1617 | BASE_REGNUM into BUFFER. */ |
| 1618 | |
| 1619 | static enum register_status |
| 1620 | pseudo_register_read_portions (struct gdbarch *gdbarch, |
| 1621 | struct regcache *regcache, |
| 1622 | int portions, |
| 1623 | int base_regnum, gdb_byte *buffer) |
| 1624 | { |
| 1625 | int portion; |
| 1626 | |
| 1627 | for (portion = 0; portion < portions; portion++) |
| 1628 | { |
| 1629 | enum register_status status; |
| 1630 | gdb_byte *b; |
| 1631 | |
| 1632 | b = buffer + register_size (gdbarch, base_regnum) * portion; |
| 1633 | status = regcache_raw_read (regcache, base_regnum + portion, b); |
| 1634 | if (status != REG_VALID) |
| 1635 | return status; |
| 1636 | } |
| 1637 | |
| 1638 | return REG_VALID; |
| 1639 | } |
| 1640 | |
| 1641 | static enum register_status |
| 1642 | sh_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1643 | int reg_nr, gdb_byte *buffer) |
| 1644 | { |
| 1645 | int base_regnum; |
| 1646 | gdb_byte temp_buffer[MAX_REGISTER_SIZE]; |
| 1647 | enum register_status status; |
| 1648 | |
| 1649 | if (reg_nr == PSEUDO_BANK_REGNUM) |
| 1650 | return regcache_raw_read (regcache, BANK_REGNUM, buffer); |
| 1651 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1652 | { |
| 1653 | base_regnum = dr_reg_base_num (gdbarch, reg_nr); |
| 1654 | |
| 1655 | /* Build the value in the provided buffer. */ |
| 1656 | /* Read the real regs for which this one is an alias. */ |
| 1657 | status = pseudo_register_read_portions (gdbarch, regcache, |
| 1658 | 2, base_regnum, temp_buffer); |
| 1659 | if (status == REG_VALID) |
| 1660 | { |
| 1661 | /* We must pay attention to the endiannes. */ |
| 1662 | sh_register_convert_to_virtual (gdbarch, reg_nr, |
| 1663 | register_type (gdbarch, reg_nr), |
| 1664 | temp_buffer, buffer); |
| 1665 | } |
| 1666 | return status; |
| 1667 | } |
| 1668 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1669 | { |
| 1670 | base_regnum = fv_reg_base_num (gdbarch, reg_nr); |
| 1671 | |
| 1672 | /* Read the real regs for which this one is an alias. */ |
| 1673 | return pseudo_register_read_portions (gdbarch, regcache, |
| 1674 | 4, base_regnum, buffer); |
| 1675 | } |
| 1676 | else |
| 1677 | gdb_assert_not_reached ("invalid pseudo register number"); |
| 1678 | } |
| 1679 | |
| 1680 | static void |
| 1681 | sh_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1682 | int reg_nr, const gdb_byte *buffer) |
| 1683 | { |
| 1684 | int base_regnum, portion; |
| 1685 | gdb_byte temp_buffer[MAX_REGISTER_SIZE]; |
| 1686 | |
| 1687 | if (reg_nr == PSEUDO_BANK_REGNUM) |
| 1688 | { |
| 1689 | /* When the bank register is written to, the whole register bank |
| 1690 | is switched and all values in the bank registers must be read |
| 1691 | from the target/sim again. We're just invalidating the regcache |
| 1692 | so that a re-read happens next time it's necessary. */ |
| 1693 | int bregnum; |
| 1694 | |
| 1695 | regcache_raw_write (regcache, BANK_REGNUM, buffer); |
| 1696 | for (bregnum = R0_BANK0_REGNUM; bregnum < MACLB_REGNUM; ++bregnum) |
| 1697 | regcache_invalidate (regcache, bregnum); |
| 1698 | } |
| 1699 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1700 | { |
| 1701 | base_regnum = dr_reg_base_num (gdbarch, reg_nr); |
| 1702 | |
| 1703 | /* We must pay attention to the endiannes. */ |
| 1704 | sh_register_convert_to_raw (gdbarch, register_type (gdbarch, reg_nr), |
| 1705 | reg_nr, buffer, temp_buffer); |
| 1706 | |
| 1707 | /* Write the real regs for which this one is an alias. */ |
| 1708 | for (portion = 0; portion < 2; portion++) |
| 1709 | regcache_raw_write (regcache, base_regnum + portion, |
| 1710 | (temp_buffer |
| 1711 | + register_size (gdbarch, |
| 1712 | base_regnum) * portion)); |
| 1713 | } |
| 1714 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1715 | { |
| 1716 | base_regnum = fv_reg_base_num (gdbarch, reg_nr); |
| 1717 | |
| 1718 | /* Write the real regs for which this one is an alias. */ |
| 1719 | for (portion = 0; portion < 4; portion++) |
| 1720 | regcache_raw_write (regcache, base_regnum + portion, |
| 1721 | (buffer |
| 1722 | + register_size (gdbarch, |
| 1723 | base_regnum) * portion)); |
| 1724 | } |
| 1725 | } |
| 1726 | |
| 1727 | static int |
| 1728 | sh_dsp_register_sim_regno (struct gdbarch *gdbarch, int nr) |
| 1729 | { |
| 1730 | if (legacy_register_sim_regno (gdbarch, nr) < 0) |
| 1731 | return legacy_register_sim_regno (gdbarch, nr); |
| 1732 | if (nr >= DSR_REGNUM && nr <= Y1_REGNUM) |
| 1733 | return nr - DSR_REGNUM + SIM_SH_DSR_REGNUM; |
| 1734 | if (nr == MOD_REGNUM) |
| 1735 | return SIM_SH_MOD_REGNUM; |
| 1736 | if (nr == RS_REGNUM) |
| 1737 | return SIM_SH_RS_REGNUM; |
| 1738 | if (nr == RE_REGNUM) |
| 1739 | return SIM_SH_RE_REGNUM; |
| 1740 | if (nr >= DSP_R0_BANK_REGNUM && nr <= DSP_R7_BANK_REGNUM) |
| 1741 | return nr - DSP_R0_BANK_REGNUM + SIM_SH_R0_BANK_REGNUM; |
| 1742 | return nr; |
| 1743 | } |
| 1744 | |
| 1745 | static int |
| 1746 | sh_sh2a_register_sim_regno (struct gdbarch *gdbarch, int nr) |
| 1747 | { |
| 1748 | switch (nr) |
| 1749 | { |
| 1750 | case TBR_REGNUM: |
| 1751 | return SIM_SH_TBR_REGNUM; |
| 1752 | case IBNR_REGNUM: |
| 1753 | return SIM_SH_IBNR_REGNUM; |
| 1754 | case IBCR_REGNUM: |
| 1755 | return SIM_SH_IBCR_REGNUM; |
| 1756 | case BANK_REGNUM: |
| 1757 | return SIM_SH_BANK_REGNUM; |
| 1758 | case MACLB_REGNUM: |
| 1759 | return SIM_SH_BANK_MACL_REGNUM; |
| 1760 | case GBRB_REGNUM: |
| 1761 | return SIM_SH_BANK_GBR_REGNUM; |
| 1762 | case PRB_REGNUM: |
| 1763 | return SIM_SH_BANK_PR_REGNUM; |
| 1764 | case IVNB_REGNUM: |
| 1765 | return SIM_SH_BANK_IVN_REGNUM; |
| 1766 | case MACHB_REGNUM: |
| 1767 | return SIM_SH_BANK_MACH_REGNUM; |
| 1768 | default: |
| 1769 | break; |
| 1770 | } |
| 1771 | return legacy_register_sim_regno (gdbarch, nr); |
| 1772 | } |
| 1773 | |
| 1774 | /* Set up the register unwinding such that call-clobbered registers are |
| 1775 | not displayed in frames >0 because the true value is not certain. |
| 1776 | The 'undefined' registers will show up as 'not available' unless the |
| 1777 | CFI says otherwise. |
| 1778 | |
| 1779 | This function is currently set up for SH4 and compatible only. */ |
| 1780 | |
| 1781 | static void |
| 1782 | sh_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, |
| 1783 | struct dwarf2_frame_state_reg *reg, |
| 1784 | struct frame_info *this_frame) |
| 1785 | { |
| 1786 | /* Mark the PC as the destination for the return address. */ |
| 1787 | if (regnum == gdbarch_pc_regnum (gdbarch)) |
| 1788 | reg->how = DWARF2_FRAME_REG_RA; |
| 1789 | |
| 1790 | /* Mark the stack pointer as the call frame address. */ |
| 1791 | else if (regnum == gdbarch_sp_regnum (gdbarch)) |
| 1792 | reg->how = DWARF2_FRAME_REG_CFA; |
| 1793 | |
| 1794 | /* The above was taken from the default init_reg in dwarf2-frame.c |
| 1795 | while the below is SH specific. */ |
| 1796 | |
| 1797 | /* Caller save registers. */ |
| 1798 | else if ((regnum >= R0_REGNUM && regnum <= R0_REGNUM+7) |
| 1799 | || (regnum >= FR0_REGNUM && regnum <= FR0_REGNUM+11) |
| 1800 | || (regnum >= DR0_REGNUM && regnum <= DR0_REGNUM+5) |
| 1801 | || (regnum >= FV0_REGNUM && regnum <= FV0_REGNUM+2) |
| 1802 | || (regnum == MACH_REGNUM) |
| 1803 | || (regnum == MACL_REGNUM) |
| 1804 | || (regnum == FPUL_REGNUM) |
| 1805 | || (regnum == SR_REGNUM)) |
| 1806 | reg->how = DWARF2_FRAME_REG_UNDEFINED; |
| 1807 | |
| 1808 | /* Callee save registers. */ |
| 1809 | else if ((regnum >= R0_REGNUM+8 && regnum <= R0_REGNUM+15) |
| 1810 | || (regnum >= FR0_REGNUM+12 && regnum <= FR0_REGNUM+15) |
| 1811 | || (regnum >= DR0_REGNUM+6 && regnum <= DR0_REGNUM+8) |
| 1812 | || (regnum == FV0_REGNUM+3)) |
| 1813 | reg->how = DWARF2_FRAME_REG_SAME_VALUE; |
| 1814 | |
| 1815 | /* Other registers. These are not in the ABI and may or may not |
| 1816 | mean anything in frames >0 so don't show them. */ |
| 1817 | else if ((regnum >= R0_BANK0_REGNUM && regnum <= R0_BANK0_REGNUM+15) |
| 1818 | || (regnum == GBR_REGNUM) |
| 1819 | || (regnum == VBR_REGNUM) |
| 1820 | || (regnum == FPSCR_REGNUM) |
| 1821 | || (regnum == SSR_REGNUM) |
| 1822 | || (regnum == SPC_REGNUM)) |
| 1823 | reg->how = DWARF2_FRAME_REG_UNDEFINED; |
| 1824 | } |
| 1825 | |
| 1826 | static struct sh_frame_cache * |
| 1827 | sh_alloc_frame_cache (void) |
| 1828 | { |
| 1829 | struct sh_frame_cache *cache; |
| 1830 | int i; |
| 1831 | |
| 1832 | cache = FRAME_OBSTACK_ZALLOC (struct sh_frame_cache); |
| 1833 | |
| 1834 | /* Base address. */ |
| 1835 | cache->base = 0; |
| 1836 | cache->saved_sp = 0; |
| 1837 | cache->sp_offset = 0; |
| 1838 | cache->pc = 0; |
| 1839 | |
| 1840 | /* Frameless until proven otherwise. */ |
| 1841 | cache->uses_fp = 0; |
| 1842 | |
| 1843 | /* Saved registers. We initialize these to -1 since zero is a valid |
| 1844 | offset (that's where fp is supposed to be stored). */ |
| 1845 | for (i = 0; i < SH_NUM_REGS; i++) |
| 1846 | { |
| 1847 | cache->saved_regs[i] = -1; |
| 1848 | } |
| 1849 | |
| 1850 | return cache; |
| 1851 | } |
| 1852 | |
| 1853 | static struct sh_frame_cache * |
| 1854 | sh_frame_cache (struct frame_info *this_frame, void **this_cache) |
| 1855 | { |
| 1856 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1857 | struct sh_frame_cache *cache; |
| 1858 | CORE_ADDR current_pc; |
| 1859 | int i; |
| 1860 | |
| 1861 | if (*this_cache) |
| 1862 | return *this_cache; |
| 1863 | |
| 1864 | cache = sh_alloc_frame_cache (); |
| 1865 | *this_cache = cache; |
| 1866 | |
| 1867 | /* In principle, for normal frames, fp holds the frame pointer, |
| 1868 | which holds the base address for the current stack frame. |
| 1869 | However, for functions that don't need it, the frame pointer is |
| 1870 | optional. For these "frameless" functions the frame pointer is |
| 1871 | actually the frame pointer of the calling frame. */ |
| 1872 | cache->base = get_frame_register_unsigned (this_frame, FP_REGNUM); |
| 1873 | if (cache->base == 0) |
| 1874 | return cache; |
| 1875 | |
| 1876 | cache->pc = get_frame_func (this_frame); |
| 1877 | current_pc = get_frame_pc (this_frame); |
| 1878 | if (cache->pc != 0) |
| 1879 | { |
| 1880 | ULONGEST fpscr; |
| 1881 | |
| 1882 | /* Check for the existence of the FPSCR register. If it exists, |
| 1883 | fetch its value for use in prologue analysis. Passing a zero |
| 1884 | value is the best choice for architecture variants upon which |
| 1885 | there's no FPSCR register. */ |
| 1886 | if (gdbarch_register_reggroup_p (gdbarch, FPSCR_REGNUM, all_reggroup)) |
| 1887 | fpscr = get_frame_register_unsigned (this_frame, FPSCR_REGNUM); |
| 1888 | else |
| 1889 | fpscr = 0; |
| 1890 | |
| 1891 | sh_analyze_prologue (gdbarch, cache->pc, current_pc, cache, fpscr); |
| 1892 | } |
| 1893 | |
| 1894 | if (!cache->uses_fp) |
| 1895 | { |
| 1896 | /* We didn't find a valid frame, which means that CACHE->base |
| 1897 | currently holds the frame pointer for our calling frame. If |
| 1898 | we're at the start of a function, or somewhere half-way its |
| 1899 | prologue, the function's frame probably hasn't been fully |
| 1900 | setup yet. Try to reconstruct the base address for the stack |
| 1901 | frame by looking at the stack pointer. For truly "frameless" |
| 1902 | functions this might work too. */ |
| 1903 | cache->base = get_frame_register_unsigned |
| 1904 | (this_frame, gdbarch_sp_regnum (gdbarch)); |
| 1905 | } |
| 1906 | |
| 1907 | /* Now that we have the base address for the stack frame we can |
| 1908 | calculate the value of sp in the calling frame. */ |
| 1909 | cache->saved_sp = cache->base + cache->sp_offset; |
| 1910 | |
| 1911 | /* Adjust all the saved registers such that they contain addresses |
| 1912 | instead of offsets. */ |
| 1913 | for (i = 0; i < SH_NUM_REGS; i++) |
| 1914 | if (cache->saved_regs[i] != -1) |
| 1915 | cache->saved_regs[i] = cache->saved_sp - cache->saved_regs[i] - 4; |
| 1916 | |
| 1917 | return cache; |
| 1918 | } |
| 1919 | |
| 1920 | static struct value * |
| 1921 | sh_frame_prev_register (struct frame_info *this_frame, |
| 1922 | void **this_cache, int regnum) |
| 1923 | { |
| 1924 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1925 | struct sh_frame_cache *cache = sh_frame_cache (this_frame, this_cache); |
| 1926 | |
| 1927 | gdb_assert (regnum >= 0); |
| 1928 | |
| 1929 | if (regnum == gdbarch_sp_regnum (gdbarch) && cache->saved_sp) |
| 1930 | return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp); |
| 1931 | |
| 1932 | /* The PC of the previous frame is stored in the PR register of |
| 1933 | the current frame. Frob regnum so that we pull the value from |
| 1934 | the correct place. */ |
| 1935 | if (regnum == gdbarch_pc_regnum (gdbarch)) |
| 1936 | regnum = PR_REGNUM; |
| 1937 | |
| 1938 | if (regnum < SH_NUM_REGS && cache->saved_regs[regnum] != -1) |
| 1939 | return frame_unwind_got_memory (this_frame, regnum, |
| 1940 | cache->saved_regs[regnum]); |
| 1941 | |
| 1942 | return frame_unwind_got_register (this_frame, regnum, regnum); |
| 1943 | } |
| 1944 | |
| 1945 | static void |
| 1946 | sh_frame_this_id (struct frame_info *this_frame, void **this_cache, |
| 1947 | struct frame_id *this_id) |
| 1948 | { |
| 1949 | struct sh_frame_cache *cache = sh_frame_cache (this_frame, this_cache); |
| 1950 | |
| 1951 | /* This marks the outermost frame. */ |
| 1952 | if (cache->base == 0) |
| 1953 | return; |
| 1954 | |
| 1955 | *this_id = frame_id_build (cache->saved_sp, cache->pc); |
| 1956 | } |
| 1957 | |
| 1958 | static const struct frame_unwind sh_frame_unwind = { |
| 1959 | NORMAL_FRAME, |
| 1960 | default_frame_unwind_stop_reason, |
| 1961 | sh_frame_this_id, |
| 1962 | sh_frame_prev_register, |
| 1963 | NULL, |
| 1964 | default_frame_sniffer |
| 1965 | }; |
| 1966 | |
| 1967 | static CORE_ADDR |
| 1968 | sh_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1969 | { |
| 1970 | return frame_unwind_register_unsigned (next_frame, |
| 1971 | gdbarch_sp_regnum (gdbarch)); |
| 1972 | } |
| 1973 | |
| 1974 | static CORE_ADDR |
| 1975 | sh_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1976 | { |
| 1977 | return frame_unwind_register_unsigned (next_frame, |
| 1978 | gdbarch_pc_regnum (gdbarch)); |
| 1979 | } |
| 1980 | |
| 1981 | static struct frame_id |
| 1982 | sh_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1983 | { |
| 1984 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, |
| 1985 | gdbarch_sp_regnum (gdbarch)); |
| 1986 | return frame_id_build (sp, get_frame_pc (this_frame)); |
| 1987 | } |
| 1988 | |
| 1989 | static CORE_ADDR |
| 1990 | sh_frame_base_address (struct frame_info *this_frame, void **this_cache) |
| 1991 | { |
| 1992 | struct sh_frame_cache *cache = sh_frame_cache (this_frame, this_cache); |
| 1993 | |
| 1994 | return cache->base; |
| 1995 | } |
| 1996 | |
| 1997 | static const struct frame_base sh_frame_base = { |
| 1998 | &sh_frame_unwind, |
| 1999 | sh_frame_base_address, |
| 2000 | sh_frame_base_address, |
| 2001 | sh_frame_base_address |
| 2002 | }; |
| 2003 | |
| 2004 | static struct sh_frame_cache * |
| 2005 | sh_make_stub_cache (struct frame_info *this_frame) |
| 2006 | { |
| 2007 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 2008 | struct sh_frame_cache *cache; |
| 2009 | |
| 2010 | cache = sh_alloc_frame_cache (); |
| 2011 | |
| 2012 | cache->saved_sp |
| 2013 | = get_frame_register_unsigned (this_frame, gdbarch_sp_regnum (gdbarch)); |
| 2014 | |
| 2015 | return cache; |
| 2016 | } |
| 2017 | |
| 2018 | static void |
| 2019 | sh_stub_this_id (struct frame_info *this_frame, void **this_cache, |
| 2020 | struct frame_id *this_id) |
| 2021 | { |
| 2022 | struct sh_frame_cache *cache; |
| 2023 | |
| 2024 | if (*this_cache == NULL) |
| 2025 | *this_cache = sh_make_stub_cache (this_frame); |
| 2026 | cache = *this_cache; |
| 2027 | |
| 2028 | *this_id = frame_id_build (cache->saved_sp, get_frame_pc (this_frame)); |
| 2029 | } |
| 2030 | |
| 2031 | static int |
| 2032 | sh_stub_unwind_sniffer (const struct frame_unwind *self, |
| 2033 | struct frame_info *this_frame, |
| 2034 | void **this_prologue_cache) |
| 2035 | { |
| 2036 | CORE_ADDR addr_in_block; |
| 2037 | |
| 2038 | addr_in_block = get_frame_address_in_block (this_frame); |
| 2039 | if (in_plt_section (addr_in_block, NULL)) |
| 2040 | return 1; |
| 2041 | |
| 2042 | return 0; |
| 2043 | } |
| 2044 | |
| 2045 | static const struct frame_unwind sh_stub_unwind = |
| 2046 | { |
| 2047 | NORMAL_FRAME, |
| 2048 | default_frame_unwind_stop_reason, |
| 2049 | sh_stub_this_id, |
| 2050 | sh_frame_prev_register, |
| 2051 | NULL, |
| 2052 | sh_stub_unwind_sniffer |
| 2053 | }; |
| 2054 | |
| 2055 | /* The epilogue is defined here as the area at the end of a function, |
| 2056 | either on the `ret' instruction itself or after an instruction which |
| 2057 | destroys the function's stack frame. */ |
| 2058 | static int |
| 2059 | sh_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 2060 | { |
| 2061 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2062 | CORE_ADDR func_addr = 0, func_end = 0; |
| 2063 | |
| 2064 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 2065 | { |
| 2066 | ULONGEST inst; |
| 2067 | /* The sh epilogue is max. 14 bytes long. Give another 14 bytes |
| 2068 | for a nop and some fixed data (e.g. big offsets) which are |
| 2069 | unfortunately also treated as part of the function (which |
| 2070 | means, they are below func_end. */ |
| 2071 | CORE_ADDR addr = func_end - 28; |
| 2072 | if (addr < func_addr + 4) |
| 2073 | addr = func_addr + 4; |
| 2074 | if (pc < addr) |
| 2075 | return 0; |
| 2076 | |
| 2077 | /* First search forward until hitting an rts. */ |
| 2078 | while (addr < func_end |
| 2079 | && !IS_RTS (read_memory_unsigned_integer (addr, 2, byte_order))) |
| 2080 | addr += 2; |
| 2081 | if (addr >= func_end) |
| 2082 | return 0; |
| 2083 | |
| 2084 | /* At this point we should find a mov.l @r15+,r14 instruction, |
| 2085 | either before or after the rts. If not, then the function has |
| 2086 | probably no "normal" epilogue and we bail out here. */ |
| 2087 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2088 | if (IS_RESTORE_FP (read_memory_unsigned_integer (addr - 2, 2, |
| 2089 | byte_order))) |
| 2090 | addr -= 2; |
| 2091 | else if (!IS_RESTORE_FP (read_memory_unsigned_integer (addr + 2, 2, |
| 2092 | byte_order))) |
| 2093 | return 0; |
| 2094 | |
| 2095 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2096 | |
| 2097 | /* Step over possible lds.l @r15+,macl. */ |
| 2098 | if (IS_MACL_LDS (inst)) |
| 2099 | { |
| 2100 | addr -= 2; |
| 2101 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2102 | } |
| 2103 | |
| 2104 | /* Step over possible lds.l @r15+,pr. */ |
| 2105 | if (IS_LDS (inst)) |
| 2106 | { |
| 2107 | addr -= 2; |
| 2108 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2109 | } |
| 2110 | |
| 2111 | /* Step over possible mov r14,r15. */ |
| 2112 | if (IS_MOV_FP_SP (inst)) |
| 2113 | { |
| 2114 | addr -= 2; |
| 2115 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2116 | } |
| 2117 | |
| 2118 | /* Now check for FP adjustments, using add #imm,r14 or add rX, r14 |
| 2119 | instructions. */ |
| 2120 | while (addr > func_addr + 4 |
| 2121 | && (IS_ADD_REG_TO_FP (inst) || IS_ADD_IMM_FP (inst))) |
| 2122 | { |
| 2123 | addr -= 2; |
| 2124 | inst = read_memory_unsigned_integer (addr - 2, 2, byte_order); |
| 2125 | } |
| 2126 | |
| 2127 | /* On SH2a check if the previous instruction was perhaps a MOVI20. |
| 2128 | That's allowed for the epilogue. */ |
| 2129 | if ((gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a |
| 2130 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a_nofpu) |
| 2131 | && addr > func_addr + 6 |
| 2132 | && IS_MOVI20 (read_memory_unsigned_integer (addr - 4, 2, |
| 2133 | byte_order))) |
| 2134 | addr -= 4; |
| 2135 | |
| 2136 | if (pc >= addr) |
| 2137 | return 1; |
| 2138 | } |
| 2139 | return 0; |
| 2140 | } |
| 2141 | |
| 2142 | |
| 2143 | /* Supply register REGNUM from the buffer specified by REGS and LEN |
| 2144 | in the register set REGSET to register cache REGCACHE. |
| 2145 | REGTABLE specifies where each register can be found in REGS. |
| 2146 | If REGNUM is -1, do this for all registers in REGSET. */ |
| 2147 | |
| 2148 | void |
| 2149 | sh_corefile_supply_regset (const struct regset *regset, |
| 2150 | struct regcache *regcache, |
| 2151 | int regnum, const void *regs, size_t len) |
| 2152 | { |
| 2153 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 2154 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2155 | const struct sh_corefile_regmap *regmap = (regset == &sh_corefile_gregset |
| 2156 | ? tdep->core_gregmap |
| 2157 | : tdep->core_fpregmap); |
| 2158 | int i; |
| 2159 | |
| 2160 | for (i = 0; regmap[i].regnum != -1; i++) |
| 2161 | { |
| 2162 | if ((regnum == -1 || regnum == regmap[i].regnum) |
| 2163 | && regmap[i].offset + 4 <= len) |
| 2164 | regcache_raw_supply (regcache, regmap[i].regnum, |
| 2165 | (char *)regs + regmap[i].offset); |
| 2166 | } |
| 2167 | } |
| 2168 | |
| 2169 | /* Collect register REGNUM in the register set REGSET from register cache |
| 2170 | REGCACHE into the buffer specified by REGS and LEN. |
| 2171 | REGTABLE specifies where each register can be found in REGS. |
| 2172 | If REGNUM is -1, do this for all registers in REGSET. */ |
| 2173 | |
| 2174 | void |
| 2175 | sh_corefile_collect_regset (const struct regset *regset, |
| 2176 | const struct regcache *regcache, |
| 2177 | int regnum, void *regs, size_t len) |
| 2178 | { |
| 2179 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 2180 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2181 | const struct sh_corefile_regmap *regmap = (regset == &sh_corefile_gregset |
| 2182 | ? tdep->core_gregmap |
| 2183 | : tdep->core_fpregmap); |
| 2184 | int i; |
| 2185 | |
| 2186 | for (i = 0; regmap[i].regnum != -1; i++) |
| 2187 | { |
| 2188 | if ((regnum == -1 || regnum == regmap[i].regnum) |
| 2189 | && regmap[i].offset + 4 <= len) |
| 2190 | regcache_raw_collect (regcache, regmap[i].regnum, |
| 2191 | (char *)regs + regmap[i].offset); |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | /* The following two regsets have the same contents, so it is tempting to |
| 2196 | unify them, but they are distiguished by their address, so don't. */ |
| 2197 | |
| 2198 | struct regset sh_corefile_gregset = |
| 2199 | { |
| 2200 | NULL, |
| 2201 | sh_corefile_supply_regset, |
| 2202 | sh_corefile_collect_regset |
| 2203 | }; |
| 2204 | |
| 2205 | static struct regset sh_corefile_fpregset = |
| 2206 | { |
| 2207 | NULL, |
| 2208 | sh_corefile_supply_regset, |
| 2209 | sh_corefile_collect_regset |
| 2210 | }; |
| 2211 | |
| 2212 | static const struct regset * |
| 2213 | sh_regset_from_core_section (struct gdbarch *gdbarch, const char *sect_name, |
| 2214 | size_t sect_size) |
| 2215 | { |
| 2216 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2217 | |
| 2218 | if (tdep->core_gregmap && strcmp (sect_name, ".reg") == 0) |
| 2219 | return &sh_corefile_gregset; |
| 2220 | |
| 2221 | if (tdep->core_fpregmap && strcmp (sect_name, ".reg2") == 0) |
| 2222 | return &sh_corefile_fpregset; |
| 2223 | |
| 2224 | return NULL; |
| 2225 | } |
| 2226 | |
| 2227 | /* This is the implementation of gdbarch method |
| 2228 | return_in_first_hidden_param_p. */ |
| 2229 | |
| 2230 | static int |
| 2231 | sh_return_in_first_hidden_param_p (struct gdbarch *gdbarch, |
| 2232 | struct type *type) |
| 2233 | { |
| 2234 | return 0; |
| 2235 | } |
| 2236 | |
| 2237 | \f |
| 2238 | |
| 2239 | static struct gdbarch * |
| 2240 | sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 2241 | { |
| 2242 | struct gdbarch *gdbarch; |
| 2243 | struct gdbarch_tdep *tdep; |
| 2244 | |
| 2245 | /* SH5 is handled entirely in sh64-tdep.c. */ |
| 2246 | if (info.bfd_arch_info->mach == bfd_mach_sh5) |
| 2247 | return sh64_gdbarch_init (info, arches); |
| 2248 | |
| 2249 | /* If there is already a candidate, use it. */ |
| 2250 | arches = gdbarch_list_lookup_by_info (arches, &info); |
| 2251 | if (arches != NULL) |
| 2252 | return arches->gdbarch; |
| 2253 | |
| 2254 | /* None found, create a new architecture from the information |
| 2255 | provided. */ |
| 2256 | tdep = XZALLOC (struct gdbarch_tdep); |
| 2257 | gdbarch = gdbarch_alloc (&info, tdep); |
| 2258 | |
| 2259 | set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
| 2260 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2261 | set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2262 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2263 | set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2264 | set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2265 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2266 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2267 | |
| 2268 | set_gdbarch_num_regs (gdbarch, SH_NUM_REGS); |
| 2269 | set_gdbarch_sp_regnum (gdbarch, 15); |
| 2270 | set_gdbarch_pc_regnum (gdbarch, 16); |
| 2271 | set_gdbarch_fp0_regnum (gdbarch, -1); |
| 2272 | set_gdbarch_num_pseudo_regs (gdbarch, 0); |
| 2273 | |
| 2274 | set_gdbarch_register_type (gdbarch, sh_default_register_type); |
| 2275 | set_gdbarch_register_reggroup_p (gdbarch, sh_register_reggroup_p); |
| 2276 | |
| 2277 | set_gdbarch_breakpoint_from_pc (gdbarch, sh_breakpoint_from_pc); |
| 2278 | |
| 2279 | set_gdbarch_print_insn (gdbarch, print_insn_sh); |
| 2280 | set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno); |
| 2281 | |
| 2282 | set_gdbarch_return_value (gdbarch, sh_return_value_nofpu); |
| 2283 | |
| 2284 | set_gdbarch_skip_prologue (gdbarch, sh_skip_prologue); |
| 2285 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 2286 | |
| 2287 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_nofpu); |
| 2288 | set_gdbarch_return_in_first_hidden_param_p (gdbarch, |
| 2289 | sh_return_in_first_hidden_param_p); |
| 2290 | |
| 2291 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
| 2292 | |
| 2293 | set_gdbarch_frame_align (gdbarch, sh_frame_align); |
| 2294 | set_gdbarch_unwind_sp (gdbarch, sh_unwind_sp); |
| 2295 | set_gdbarch_unwind_pc (gdbarch, sh_unwind_pc); |
| 2296 | set_gdbarch_dummy_id (gdbarch, sh_dummy_id); |
| 2297 | frame_base_set_default (gdbarch, &sh_frame_base); |
| 2298 | |
| 2299 | set_gdbarch_in_function_epilogue_p (gdbarch, sh_in_function_epilogue_p); |
| 2300 | |
| 2301 | dwarf2_frame_set_init_reg (gdbarch, sh_dwarf2_frame_init_reg); |
| 2302 | |
| 2303 | set_gdbarch_regset_from_core_section (gdbarch, sh_regset_from_core_section); |
| 2304 | |
| 2305 | switch (info.bfd_arch_info->mach) |
| 2306 | { |
| 2307 | case bfd_mach_sh: |
| 2308 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2309 | break; |
| 2310 | |
| 2311 | case bfd_mach_sh2: |
| 2312 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2313 | break; |
| 2314 | |
| 2315 | case bfd_mach_sh2e: |
| 2316 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2317 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2318 | set_gdbarch_double_format (gdbarch, floatformats_ieee_single); |
| 2319 | |
| 2320 | set_gdbarch_register_name (gdbarch, sh_sh2e_register_name); |
| 2321 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2322 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2323 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2324 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2325 | break; |
| 2326 | |
| 2327 | case bfd_mach_sh2a: |
| 2328 | set_gdbarch_register_name (gdbarch, sh_sh2a_register_name); |
| 2329 | set_gdbarch_register_type (gdbarch, sh_sh2a_register_type); |
| 2330 | set_gdbarch_register_sim_regno (gdbarch, sh_sh2a_register_sim_regno); |
| 2331 | |
| 2332 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2333 | set_gdbarch_num_pseudo_regs (gdbarch, 9); |
| 2334 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2335 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2336 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2337 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2338 | break; |
| 2339 | |
| 2340 | case bfd_mach_sh2a_nofpu: |
| 2341 | set_gdbarch_register_name (gdbarch, sh_sh2a_nofpu_register_name); |
| 2342 | set_gdbarch_register_sim_regno (gdbarch, sh_sh2a_register_sim_regno); |
| 2343 | |
| 2344 | set_gdbarch_num_pseudo_regs (gdbarch, 1); |
| 2345 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2346 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2347 | break; |
| 2348 | |
| 2349 | case bfd_mach_sh_dsp: |
| 2350 | set_gdbarch_register_name (gdbarch, sh_sh_dsp_register_name); |
| 2351 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2352 | break; |
| 2353 | |
| 2354 | case bfd_mach_sh3: |
| 2355 | case bfd_mach_sh3_nommu: |
| 2356 | case bfd_mach_sh2a_nofpu_or_sh3_nommu: |
| 2357 | set_gdbarch_register_name (gdbarch, sh_sh3_register_name); |
| 2358 | break; |
| 2359 | |
| 2360 | case bfd_mach_sh3e: |
| 2361 | case bfd_mach_sh2a_or_sh3e: |
| 2362 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2363 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2364 | set_gdbarch_double_format (gdbarch, floatformats_ieee_single); |
| 2365 | |
| 2366 | set_gdbarch_register_name (gdbarch, sh_sh3e_register_name); |
| 2367 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2368 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2369 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2370 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2371 | break; |
| 2372 | |
| 2373 | case bfd_mach_sh3_dsp: |
| 2374 | set_gdbarch_register_name (gdbarch, sh_sh3_dsp_register_name); |
| 2375 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2376 | break; |
| 2377 | |
| 2378 | case bfd_mach_sh4: |
| 2379 | case bfd_mach_sh4a: |
| 2380 | case bfd_mach_sh2a_or_sh4: |
| 2381 | set_gdbarch_register_name (gdbarch, sh_sh4_register_name); |
| 2382 | set_gdbarch_register_type (gdbarch, sh_sh4_register_type); |
| 2383 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2384 | set_gdbarch_num_pseudo_regs (gdbarch, 13); |
| 2385 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2386 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2387 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2388 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2389 | break; |
| 2390 | |
| 2391 | case bfd_mach_sh4_nofpu: |
| 2392 | case bfd_mach_sh4a_nofpu: |
| 2393 | case bfd_mach_sh4_nommu_nofpu: |
| 2394 | case bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu: |
| 2395 | set_gdbarch_register_name (gdbarch, sh_sh4_nofpu_register_name); |
| 2396 | break; |
| 2397 | |
| 2398 | case bfd_mach_sh4al_dsp: |
| 2399 | set_gdbarch_register_name (gdbarch, sh_sh4al_dsp_register_name); |
| 2400 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2401 | break; |
| 2402 | |
| 2403 | default: |
| 2404 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2405 | break; |
| 2406 | } |
| 2407 | |
| 2408 | /* Hook in ABI-specific overrides, if they have been registered. */ |
| 2409 | gdbarch_init_osabi (info, gdbarch); |
| 2410 | |
| 2411 | dwarf2_append_unwinders (gdbarch); |
| 2412 | frame_unwind_append_unwinder (gdbarch, &sh_stub_unwind); |
| 2413 | frame_unwind_append_unwinder (gdbarch, &sh_frame_unwind); |
| 2414 | |
| 2415 | return gdbarch; |
| 2416 | } |
| 2417 | |
| 2418 | static void |
| 2419 | show_sh_command (char *args, int from_tty) |
| 2420 | { |
| 2421 | help_list (showshcmdlist, "show sh ", all_commands, gdb_stdout); |
| 2422 | } |
| 2423 | |
| 2424 | static void |
| 2425 | set_sh_command (char *args, int from_tty) |
| 2426 | { |
| 2427 | printf_unfiltered |
| 2428 | ("\"set sh\" must be followed by an appropriate subcommand.\n"); |
| 2429 | help_list (setshcmdlist, "set sh ", all_commands, gdb_stdout); |
| 2430 | } |
| 2431 | |
| 2432 | extern initialize_file_ftype _initialize_sh_tdep; /* -Wmissing-prototypes */ |
| 2433 | |
| 2434 | void |
| 2435 | _initialize_sh_tdep (void) |
| 2436 | { |
| 2437 | gdbarch_register (bfd_arch_sh, sh_gdbarch_init, NULL); |
| 2438 | |
| 2439 | add_prefix_cmd ("sh", no_class, set_sh_command, "SH specific commands.", |
| 2440 | &setshcmdlist, "set sh ", 0, &setlist); |
| 2441 | add_prefix_cmd ("sh", no_class, show_sh_command, "SH specific commands.", |
| 2442 | &showshcmdlist, "show sh ", 0, &showlist); |
| 2443 | |
| 2444 | add_setshow_enum_cmd ("calling-convention", class_vars, sh_cc_enum, |
| 2445 | &sh_active_calling_convention, |
| 2446 | _("Set calling convention used when calling target " |
| 2447 | "functions from GDB."), |
| 2448 | _("Show calling convention used when calling target " |
| 2449 | "functions from GDB."), |
| 2450 | _("gcc - Use GCC calling convention (default).\n" |
| 2451 | "renesas - Enforce Renesas calling convention."), |
| 2452 | NULL, NULL, |
| 2453 | &setshcmdlist, &showshcmdlist); |
| 2454 | } |