| 1 | /* Target-dependent code for Renesas Super-H, for GDB. |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2003, 2004 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* |
| 23 | Contributed by Steve Chamberlain |
| 24 | sac@cygnus.com |
| 25 | */ |
| 26 | |
| 27 | #include "defs.h" |
| 28 | #include "frame.h" |
| 29 | #include "frame-base.h" |
| 30 | #include "frame-unwind.h" |
| 31 | #include "dwarf2-frame.h" |
| 32 | #include "symtab.h" |
| 33 | #include "gdbtypes.h" |
| 34 | #include "gdbcmd.h" |
| 35 | #include "gdbcore.h" |
| 36 | #include "value.h" |
| 37 | #include "dis-asm.h" |
| 38 | #include "inferior.h" |
| 39 | #include "gdb_string.h" |
| 40 | #include "gdb_assert.h" |
| 41 | #include "arch-utils.h" |
| 42 | #include "floatformat.h" |
| 43 | #include "regcache.h" |
| 44 | #include "doublest.h" |
| 45 | #include "osabi.h" |
| 46 | |
| 47 | #include "sh-tdep.h" |
| 48 | |
| 49 | #include "elf-bfd.h" |
| 50 | #include "solib-svr4.h" |
| 51 | |
| 52 | /* sh flags */ |
| 53 | #include "elf/sh.h" |
| 54 | /* registers numbers shared with the simulator */ |
| 55 | #include "gdb/sim-sh.h" |
| 56 | |
| 57 | static void (*sh_show_regs) (void); |
| 58 | |
| 59 | #define SH_NUM_REGS 67 |
| 60 | |
| 61 | struct sh_frame_cache |
| 62 | { |
| 63 | /* Base address. */ |
| 64 | CORE_ADDR base; |
| 65 | LONGEST sp_offset; |
| 66 | CORE_ADDR pc; |
| 67 | |
| 68 | /* Flag showing that a frame has been created in the prologue code. */ |
| 69 | int uses_fp; |
| 70 | |
| 71 | /* Saved registers. */ |
| 72 | CORE_ADDR saved_regs[SH_NUM_REGS]; |
| 73 | CORE_ADDR saved_sp; |
| 74 | }; |
| 75 | |
| 76 | static const char * |
| 77 | sh_sh_register_name (int reg_nr) |
| 78 | { |
| 79 | static char *register_names[] = { |
| 80 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 81 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 82 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 83 | "", "", |
| 84 | "", "", "", "", "", "", "", "", |
| 85 | "", "", "", "", "", "", "", "", |
| 86 | "", "", |
| 87 | "", "", "", "", "", "", "", "", |
| 88 | "", "", "", "", "", "", "", "", |
| 89 | "", "", "", "", "", "", "", "", |
| 90 | }; |
| 91 | if (reg_nr < 0) |
| 92 | return NULL; |
| 93 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 94 | return NULL; |
| 95 | return register_names[reg_nr]; |
| 96 | } |
| 97 | |
| 98 | static const char * |
| 99 | sh_sh3_register_name (int reg_nr) |
| 100 | { |
| 101 | static char *register_names[] = { |
| 102 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 103 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 104 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 105 | "", "", |
| 106 | "", "", "", "", "", "", "", "", |
| 107 | "", "", "", "", "", "", "", "", |
| 108 | "ssr", "spc", |
| 109 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 110 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1" |
| 111 | "", "", "", "", "", "", "", "", |
| 112 | }; |
| 113 | if (reg_nr < 0) |
| 114 | return NULL; |
| 115 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 116 | return NULL; |
| 117 | return register_names[reg_nr]; |
| 118 | } |
| 119 | |
| 120 | static const char * |
| 121 | sh_sh3e_register_name (int reg_nr) |
| 122 | { |
| 123 | static char *register_names[] = { |
| 124 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 125 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 126 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 127 | "fpul", "fpscr", |
| 128 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 129 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 130 | "ssr", "spc", |
| 131 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 132 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 133 | "", "", "", "", "", "", "", "", |
| 134 | }; |
| 135 | if (reg_nr < 0) |
| 136 | return NULL; |
| 137 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 138 | return NULL; |
| 139 | return register_names[reg_nr]; |
| 140 | } |
| 141 | |
| 142 | static const char * |
| 143 | sh_sh2e_register_name (int reg_nr) |
| 144 | { |
| 145 | static char *register_names[] = { |
| 146 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 147 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 148 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 149 | "fpul", "fpscr", |
| 150 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 151 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 152 | "", "", |
| 153 | "", "", "", "", "", "", "", "", |
| 154 | "", "", "", "", "", "", "", "", |
| 155 | "", "", "", "", "", "", "", "", |
| 156 | }; |
| 157 | if (reg_nr < 0) |
| 158 | return NULL; |
| 159 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 160 | return NULL; |
| 161 | return register_names[reg_nr]; |
| 162 | } |
| 163 | |
| 164 | static const char * |
| 165 | sh_sh2a_register_name (int reg_nr) |
| 166 | { |
| 167 | static char *register_names[] = { |
| 168 | /* general registers 0-15 */ |
| 169 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 170 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 171 | /* 16 - 22 */ |
| 172 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 173 | /* 23, 24 */ |
| 174 | "fpul", "fpscr", |
| 175 | /* floating point registers 25 - 40 */ |
| 176 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 177 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 178 | /* 41, 42 */ |
| 179 | "", "", |
| 180 | /* 43 - 62. Banked registers. The bank number used is determined by |
| 181 | the bank register (63). */ |
| 182 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 183 | "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", |
| 184 | "machb", "ivnb", "prb", "gbrb", "maclb", |
| 185 | /* 63: register bank number, not a real register but used to |
| 186 | communicate the register bank currently get/set. This register |
| 187 | is hidden to the user, who manipulates it using the pseudo |
| 188 | register called "bank" (67). See below. */ |
| 189 | "", |
| 190 | /* 64 - 66 */ |
| 191 | "ibcr", "ibnr", "tbr", |
| 192 | /* 67: register bank number, the user visible pseudo register. */ |
| 193 | "bank", |
| 194 | /* double precision (pseudo) 68 - 75 */ |
| 195 | "dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14", |
| 196 | }; |
| 197 | if (reg_nr < 0) |
| 198 | return NULL; |
| 199 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 200 | return NULL; |
| 201 | return register_names[reg_nr]; |
| 202 | } |
| 203 | |
| 204 | static const char * |
| 205 | sh_sh2a_nofpu_register_name (int reg_nr) |
| 206 | { |
| 207 | static char *register_names[] = { |
| 208 | /* general registers 0-15 */ |
| 209 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 210 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 211 | /* 16 - 22 */ |
| 212 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 213 | /* 23, 24 */ |
| 214 | "", "", |
| 215 | /* floating point registers 25 - 40 */ |
| 216 | "", "", "", "", "", "", "", "", |
| 217 | "", "", "", "", "", "", "", "", |
| 218 | /* 41, 42 */ |
| 219 | "", "", |
| 220 | /* 43 - 62. Banked registers. The bank number used is determined by |
| 221 | the bank register (63). */ |
| 222 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 223 | "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", |
| 224 | "machb", "ivnb", "prb", "gbrb", "maclb", |
| 225 | /* 63: register bank number, not a real register but used to |
| 226 | communicate the register bank currently get/set. This register |
| 227 | is hidden to the user, who manipulates it using the pseudo |
| 228 | register called "bank" (67). See below. */ |
| 229 | "", |
| 230 | /* 64 - 66 */ |
| 231 | "ibcr", "ibnr", "tbr", |
| 232 | /* 67: register bank number, the user visible pseudo register. */ |
| 233 | "bank", |
| 234 | /* double precision (pseudo) 68 - 75 */ |
| 235 | "", "", "", "", "", "", "", "", |
| 236 | }; |
| 237 | if (reg_nr < 0) |
| 238 | return NULL; |
| 239 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 240 | return NULL; |
| 241 | return register_names[reg_nr]; |
| 242 | } |
| 243 | |
| 244 | static const char * |
| 245 | sh_sh_dsp_register_name (int reg_nr) |
| 246 | { |
| 247 | static char *register_names[] = { |
| 248 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 249 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 250 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 251 | "", "dsr", |
| 252 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 253 | "y0", "y1", "", "", "", "", "", "mod", |
| 254 | "", "", |
| 255 | "rs", "re", "", "", "", "", "", "", |
| 256 | "", "", "", "", "", "", "", "", |
| 257 | "", "", "", "", "", "", "", "", |
| 258 | }; |
| 259 | if (reg_nr < 0) |
| 260 | return NULL; |
| 261 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 262 | return NULL; |
| 263 | return register_names[reg_nr]; |
| 264 | } |
| 265 | |
| 266 | static const char * |
| 267 | sh_sh3_dsp_register_name (int reg_nr) |
| 268 | { |
| 269 | static char *register_names[] = { |
| 270 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 271 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 272 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 273 | "", "dsr", |
| 274 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 275 | "y0", "y1", "", "", "", "", "", "mod", |
| 276 | "ssr", "spc", |
| 277 | "rs", "re", "", "", "", "", "", "", |
| 278 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 279 | "", "", "", "", "", "", "", "", |
| 280 | "", "", "", "", "", "", "", "", |
| 281 | }; |
| 282 | if (reg_nr < 0) |
| 283 | return NULL; |
| 284 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 285 | return NULL; |
| 286 | return register_names[reg_nr]; |
| 287 | } |
| 288 | |
| 289 | static const char * |
| 290 | sh_sh4_register_name (int reg_nr) |
| 291 | { |
| 292 | static char *register_names[] = { |
| 293 | /* general registers 0-15 */ |
| 294 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 295 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 296 | /* 16 - 22 */ |
| 297 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 298 | /* 23, 24 */ |
| 299 | "fpul", "fpscr", |
| 300 | /* floating point registers 25 - 40 */ |
| 301 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 302 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 303 | /* 41, 42 */ |
| 304 | "ssr", "spc", |
| 305 | /* bank 0 43 - 50 */ |
| 306 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 307 | /* bank 1 51 - 58 */ |
| 308 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 309 | "", "", "", "", "", "", "", "", |
| 310 | /* pseudo bank register. */ |
| 311 | "", |
| 312 | /* double precision (pseudo) 59 - 66 */ |
| 313 | "dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14", |
| 314 | /* vectors (pseudo) 67 - 70 */ |
| 315 | "fv0", "fv4", "fv8", "fv12", |
| 316 | /* FIXME: missing XF 71 - 86 */ |
| 317 | /* FIXME: missing XD 87 - 94 */ |
| 318 | }; |
| 319 | if (reg_nr < 0) |
| 320 | return NULL; |
| 321 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 322 | return NULL; |
| 323 | return register_names[reg_nr]; |
| 324 | } |
| 325 | |
| 326 | static const char * |
| 327 | sh_sh4_nofpu_register_name (int reg_nr) |
| 328 | { |
| 329 | static char *register_names[] = { |
| 330 | /* general registers 0-15 */ |
| 331 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 332 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 333 | /* 16 - 22 */ |
| 334 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 335 | /* 23, 24 */ |
| 336 | "", "", |
| 337 | /* floating point registers 25 - 40 -- not for nofpu target */ |
| 338 | "", "", "", "", "", "", "", "", |
| 339 | "", "", "", "", "", "", "", "", |
| 340 | /* 41, 42 */ |
| 341 | "ssr", "spc", |
| 342 | /* bank 0 43 - 50 */ |
| 343 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 344 | /* bank 1 51 - 58 */ |
| 345 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 346 | "", "", "", "", "", "", "", "", |
| 347 | /* pseudo bank register. */ |
| 348 | "", |
| 349 | /* double precision (pseudo) 59 - 66 -- not for nofpu target */ |
| 350 | "", "", "", "", "", "", "", "", |
| 351 | /* vectors (pseudo) 67 - 70 -- not for nofpu target */ |
| 352 | "", "", "", "", |
| 353 | }; |
| 354 | if (reg_nr < 0) |
| 355 | return NULL; |
| 356 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 357 | return NULL; |
| 358 | return register_names[reg_nr]; |
| 359 | } |
| 360 | |
| 361 | static const char * |
| 362 | sh_sh4al_dsp_register_name (int reg_nr) |
| 363 | { |
| 364 | static char *register_names[] = { |
| 365 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 366 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 367 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 368 | "", "dsr", |
| 369 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 370 | "y0", "y1", "", "", "", "", "", "mod", |
| 371 | "ssr", "spc", |
| 372 | "rs", "re", "", "", "", "", "", "", |
| 373 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b", |
| 374 | "", "", "", "", "", "", "", "", |
| 375 | "", "", "", "", "", "", "", "", |
| 376 | }; |
| 377 | if (reg_nr < 0) |
| 378 | return NULL; |
| 379 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 380 | return NULL; |
| 381 | return register_names[reg_nr]; |
| 382 | } |
| 383 | |
| 384 | static const unsigned char * |
| 385 | sh_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
| 386 | { |
| 387 | /* 0xc3c3 is trapa #c3, and it works in big and little endian modes */ |
| 388 | static unsigned char breakpoint[] = { 0xc3, 0xc3 }; |
| 389 | |
| 390 | *lenptr = sizeof (breakpoint); |
| 391 | return breakpoint; |
| 392 | } |
| 393 | |
| 394 | /* Prologue looks like |
| 395 | mov.l r14,@-r15 |
| 396 | sts.l pr,@-r15 |
| 397 | mov.l <regs>,@-r15 |
| 398 | sub <room_for_loca_vars>,r15 |
| 399 | mov r15,r14 |
| 400 | |
| 401 | Actually it can be more complicated than this but that's it, basically. |
| 402 | */ |
| 403 | |
| 404 | #define GET_SOURCE_REG(x) (((x) >> 4) & 0xf) |
| 405 | #define GET_TARGET_REG(x) (((x) >> 8) & 0xf) |
| 406 | |
| 407 | /* JSR @Rm 0100mmmm00001011 */ |
| 408 | #define IS_JSR(x) (((x) & 0xf0ff) == 0x400b) |
| 409 | |
| 410 | /* STS.L PR,@-r15 0100111100100010 |
| 411 | r15-4-->r15, PR-->(r15) */ |
| 412 | #define IS_STS(x) ((x) == 0x4f22) |
| 413 | |
| 414 | /* STS.L MACL,@-r15 0100111100010010 |
| 415 | r15-4-->r15, MACL-->(r15) */ |
| 416 | #define IS_MACL_STS(x) ((x) == 0x4f12) |
| 417 | |
| 418 | /* MOV.L Rm,@-r15 00101111mmmm0110 |
| 419 | r15-4-->r15, Rm-->(R15) */ |
| 420 | #define IS_PUSH(x) (((x) & 0xff0f) == 0x2f06) |
| 421 | |
| 422 | /* MOV r15,r14 0110111011110011 |
| 423 | r15-->r14 */ |
| 424 | #define IS_MOV_SP_FP(x) ((x) == 0x6ef3) |
| 425 | |
| 426 | /* ADD #imm,r15 01111111iiiiiiii |
| 427 | r15+imm-->r15 */ |
| 428 | #define IS_ADD_IMM_SP(x) (((x) & 0xff00) == 0x7f00) |
| 429 | |
| 430 | #define IS_MOV_R3(x) (((x) & 0xff00) == 0x1a00) |
| 431 | #define IS_SHLL_R3(x) ((x) == 0x4300) |
| 432 | |
| 433 | /* ADD r3,r15 0011111100111100 |
| 434 | r15+r3-->r15 */ |
| 435 | #define IS_ADD_R3SP(x) ((x) == 0x3f3c) |
| 436 | |
| 437 | /* FMOV.S FRm,@-Rn Rn-4-->Rn, FRm-->(Rn) 1111nnnnmmmm1011 |
| 438 | FMOV DRm,@-Rn Rn-8-->Rn, DRm-->(Rn) 1111nnnnmmm01011 |
| 439 | FMOV XDm,@-Rn Rn-8-->Rn, XDm-->(Rn) 1111nnnnmmm11011 */ |
| 440 | /* CV, 2003-08-28: Only suitable with Rn == SP, therefore name changed to |
| 441 | make this entirely clear. */ |
| 442 | /* #define IS_FMOV(x) (((x) & 0xf00f) == 0xf00b) */ |
| 443 | #define IS_FPUSH(x) (((x) & 0xff0f) == 0xff0b) |
| 444 | |
| 445 | /* MOV Rm,Rn Rm-->Rn 0110nnnnmmmm0011 4 <= m <= 7 */ |
| 446 | #define IS_MOV_ARG_TO_REG(x) \ |
| 447 | (((x) & 0xf00f) == 0x6003 && \ |
| 448 | ((x) & 0x00f0) >= 0x0040 && \ |
| 449 | ((x) & 0x00f0) <= 0x0070) |
| 450 | /* MOV.L Rm,@Rn 0010nnnnmmmm0010 n = 14, 4 <= m <= 7 */ |
| 451 | #define IS_MOV_ARG_TO_IND_R14(x) \ |
| 452 | (((x) & 0xff0f) == 0x2e02 && \ |
| 453 | ((x) & 0x00f0) >= 0x0040 && \ |
| 454 | ((x) & 0x00f0) <= 0x0070) |
| 455 | /* MOV.L Rm,@(disp*4,Rn) 00011110mmmmdddd n = 14, 4 <= m <= 7 */ |
| 456 | #define IS_MOV_ARG_TO_IND_R14_WITH_DISP(x) \ |
| 457 | (((x) & 0xff00) == 0x1e00 && \ |
| 458 | ((x) & 0x00f0) >= 0x0040 && \ |
| 459 | ((x) & 0x00f0) <= 0x0070) |
| 460 | |
| 461 | /* MOV.W @(disp*2,PC),Rn 1001nnnndddddddd */ |
| 462 | #define IS_MOVW_PCREL_TO_REG(x) (((x) & 0xf000) == 0x9000) |
| 463 | /* MOV.L @(disp*4,PC),Rn 1101nnnndddddddd */ |
| 464 | #define IS_MOVL_PCREL_TO_REG(x) (((x) & 0xf000) == 0xd000) |
| 465 | /* MOVI20 #imm20,Rn 0000nnnniiii0000 */ |
| 466 | #define IS_MOVI20(x) (((x) & 0xf00f) == 0x0000) |
| 467 | /* SUB Rn,R15 00111111nnnn1000 */ |
| 468 | #define IS_SUB_REG_FROM_SP(x) (((x) & 0xff0f) == 0x3f08) |
| 469 | |
| 470 | #define FPSCR_SZ (1 << 20) |
| 471 | |
| 472 | /* The following instructions are used for epilogue testing. */ |
| 473 | #define IS_RESTORE_FP(x) ((x) == 0x6ef6) |
| 474 | #define IS_RTS(x) ((x) == 0x000b) |
| 475 | #define IS_LDS(x) ((x) == 0x4f26) |
| 476 | #define IS_MACL_LDS(x) ((x) == 0x4f16) |
| 477 | #define IS_MOV_FP_SP(x) ((x) == 0x6fe3) |
| 478 | #define IS_ADD_REG_TO_FP(x) (((x) & 0xff0f) == 0x3e0c) |
| 479 | #define IS_ADD_IMM_FP(x) (((x) & 0xff00) == 0x7e00) |
| 480 | |
| 481 | /* Disassemble an instruction. */ |
| 482 | static int |
| 483 | gdb_print_insn_sh (bfd_vma memaddr, disassemble_info * info) |
| 484 | { |
| 485 | info->endian = TARGET_BYTE_ORDER; |
| 486 | return print_insn_sh (memaddr, info); |
| 487 | } |
| 488 | |
| 489 | static CORE_ADDR |
| 490 | sh_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, |
| 491 | struct sh_frame_cache *cache) |
| 492 | { |
| 493 | ULONGEST inst; |
| 494 | CORE_ADDR opc; |
| 495 | int offset; |
| 496 | int sav_offset = 0; |
| 497 | int r3_val = 0; |
| 498 | int reg, sav_reg = -1; |
| 499 | |
| 500 | if (pc >= current_pc) |
| 501 | return current_pc; |
| 502 | |
| 503 | cache->uses_fp = 0; |
| 504 | for (opc = pc + (2 * 28); pc < opc; pc += 2) |
| 505 | { |
| 506 | inst = read_memory_unsigned_integer (pc, 2); |
| 507 | /* See where the registers will be saved to */ |
| 508 | if (IS_PUSH (inst)) |
| 509 | { |
| 510 | cache->saved_regs[GET_SOURCE_REG (inst)] = cache->sp_offset; |
| 511 | cache->sp_offset += 4; |
| 512 | } |
| 513 | else if (IS_STS (inst)) |
| 514 | { |
| 515 | cache->saved_regs[PR_REGNUM] = cache->sp_offset; |
| 516 | cache->sp_offset += 4; |
| 517 | } |
| 518 | else if (IS_MACL_STS (inst)) |
| 519 | { |
| 520 | cache->saved_regs[MACL_REGNUM] = cache->sp_offset; |
| 521 | cache->sp_offset += 4; |
| 522 | } |
| 523 | else if (IS_MOV_R3 (inst)) |
| 524 | { |
| 525 | r3_val = ((inst & 0xff) ^ 0x80) - 0x80; |
| 526 | } |
| 527 | else if (IS_SHLL_R3 (inst)) |
| 528 | { |
| 529 | r3_val <<= 1; |
| 530 | } |
| 531 | else if (IS_ADD_R3SP (inst)) |
| 532 | { |
| 533 | cache->sp_offset += -r3_val; |
| 534 | } |
| 535 | else if (IS_ADD_IMM_SP (inst)) |
| 536 | { |
| 537 | offset = ((inst & 0xff) ^ 0x80) - 0x80; |
| 538 | cache->sp_offset -= offset; |
| 539 | } |
| 540 | else if (IS_MOVW_PCREL_TO_REG (inst)) |
| 541 | { |
| 542 | if (sav_reg < 0) |
| 543 | { |
| 544 | reg = GET_TARGET_REG (inst); |
| 545 | if (reg < 14) |
| 546 | { |
| 547 | sav_reg = reg; |
| 548 | offset = (inst & 0xff) << 1; |
| 549 | sav_offset = |
| 550 | read_memory_integer ((pc + 4) + offset, 2); |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | else if (IS_MOVL_PCREL_TO_REG (inst)) |
| 555 | { |
| 556 | if (sav_reg < 0) |
| 557 | { |
| 558 | reg = GET_TARGET_REG (inst); |
| 559 | if (reg < 14) |
| 560 | { |
| 561 | sav_reg = reg; |
| 562 | offset = (inst & 0xff) << 2; |
| 563 | sav_offset = |
| 564 | read_memory_integer (((pc & 0xfffffffc) + 4) + offset, 4); |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | else if (IS_MOVI20 (inst)) |
| 569 | { |
| 570 | if (sav_reg < 0) |
| 571 | { |
| 572 | reg = GET_TARGET_REG (inst); |
| 573 | if (reg < 14) |
| 574 | { |
| 575 | sav_reg = reg; |
| 576 | sav_offset = GET_SOURCE_REG (inst) << 16; |
| 577 | /* MOVI20 is a 32 bit instruction! */ |
| 578 | pc += 2; |
| 579 | sav_offset |= read_memory_unsigned_integer (pc, 2); |
| 580 | /* Now sav_offset contains an unsigned 20 bit value. |
| 581 | It must still get sign extended. */ |
| 582 | if (sav_offset & 0x00080000) |
| 583 | sav_offset |= 0xfff00000; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | else if (IS_SUB_REG_FROM_SP (inst)) |
| 588 | { |
| 589 | reg = GET_SOURCE_REG (inst); |
| 590 | if (sav_reg > 0 && reg == sav_reg) |
| 591 | { |
| 592 | sav_reg = -1; |
| 593 | } |
| 594 | cache->sp_offset += sav_offset; |
| 595 | } |
| 596 | else if (IS_FPUSH (inst)) |
| 597 | { |
| 598 | if (read_register (FPSCR_REGNUM) & FPSCR_SZ) |
| 599 | { |
| 600 | cache->sp_offset += 8; |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | cache->sp_offset += 4; |
| 605 | } |
| 606 | } |
| 607 | else if (IS_MOV_SP_FP (inst)) |
| 608 | { |
| 609 | cache->uses_fp = 1; |
| 610 | /* At this point, only allow argument register moves to other |
| 611 | registers or argument register moves to @(X,fp) which are |
| 612 | moving the register arguments onto the stack area allocated |
| 613 | by a former add somenumber to SP call. Don't allow moving |
| 614 | to an fp indirect address above fp + cache->sp_offset. */ |
| 615 | pc += 2; |
| 616 | for (opc = pc + 12; pc < opc; pc += 2) |
| 617 | { |
| 618 | inst = read_memory_integer (pc, 2); |
| 619 | if (IS_MOV_ARG_TO_IND_R14 (inst)) |
| 620 | { |
| 621 | reg = GET_SOURCE_REG (inst); |
| 622 | if (cache->sp_offset > 0) |
| 623 | cache->saved_regs[reg] = cache->sp_offset; |
| 624 | } |
| 625 | else if (IS_MOV_ARG_TO_IND_R14_WITH_DISP (inst)) |
| 626 | { |
| 627 | reg = GET_SOURCE_REG (inst); |
| 628 | offset = (inst & 0xf) * 4; |
| 629 | if (cache->sp_offset > offset) |
| 630 | cache->saved_regs[reg] = cache->sp_offset - offset; |
| 631 | } |
| 632 | else if (IS_MOV_ARG_TO_REG (inst)) |
| 633 | continue; |
| 634 | else |
| 635 | break; |
| 636 | } |
| 637 | break; |
| 638 | } |
| 639 | else if (IS_JSR (inst)) |
| 640 | { |
| 641 | /* We have found a jsr that has been scheduled into the prologue. |
| 642 | If we continue the scan and return a pc someplace after this, |
| 643 | then setting a breakpoint on this function will cause it to |
| 644 | appear to be called after the function it is calling via the |
| 645 | jsr, which will be very confusing. Most likely the next |
| 646 | instruction is going to be IS_MOV_SP_FP in the delay slot. If |
| 647 | so, note that before returning the current pc. */ |
| 648 | inst = read_memory_integer (pc + 2, 2); |
| 649 | if (IS_MOV_SP_FP (inst)) |
| 650 | cache->uses_fp = 1; |
| 651 | break; |
| 652 | } |
| 653 | #if 0 /* This used to just stop when it found an instruction that |
| 654 | was not considered part of the prologue. Now, we just |
| 655 | keep going looking for likely instructions. */ |
| 656 | else |
| 657 | break; |
| 658 | #endif |
| 659 | } |
| 660 | |
| 661 | return pc; |
| 662 | } |
| 663 | |
| 664 | /* Skip any prologue before the guts of a function */ |
| 665 | |
| 666 | /* Skip the prologue using the debug information. If this fails we'll |
| 667 | fall back on the 'guess' method below. */ |
| 668 | static CORE_ADDR |
| 669 | after_prologue (CORE_ADDR pc) |
| 670 | { |
| 671 | struct symtab_and_line sal; |
| 672 | CORE_ADDR func_addr, func_end; |
| 673 | |
| 674 | /* If we can not find the symbol in the partial symbol table, then |
| 675 | there is no hope we can determine the function's start address |
| 676 | with this code. */ |
| 677 | if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 678 | return 0; |
| 679 | |
| 680 | /* Get the line associated with FUNC_ADDR. */ |
| 681 | sal = find_pc_line (func_addr, 0); |
| 682 | |
| 683 | /* There are only two cases to consider. First, the end of the source line |
| 684 | is within the function bounds. In that case we return the end of the |
| 685 | source line. Second is the end of the source line extends beyond the |
| 686 | bounds of the current function. We need to use the slow code to |
| 687 | examine instructions in that case. */ |
| 688 | if (sal.end < func_end) |
| 689 | return sal.end; |
| 690 | else |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | static CORE_ADDR |
| 695 | sh_skip_prologue (CORE_ADDR start_pc) |
| 696 | { |
| 697 | CORE_ADDR pc; |
| 698 | struct sh_frame_cache cache; |
| 699 | |
| 700 | /* See if we can determine the end of the prologue via the symbol table. |
| 701 | If so, then return either PC, or the PC after the prologue, whichever |
| 702 | is greater. */ |
| 703 | pc = after_prologue (start_pc); |
| 704 | |
| 705 | /* If after_prologue returned a useful address, then use it. Else |
| 706 | fall back on the instruction skipping code. */ |
| 707 | if (pc) |
| 708 | return max (pc, start_pc); |
| 709 | |
| 710 | cache.sp_offset = -4; |
| 711 | pc = sh_analyze_prologue (start_pc, (CORE_ADDR) -1, &cache); |
| 712 | if (!cache.uses_fp) |
| 713 | return start_pc; |
| 714 | |
| 715 | return pc; |
| 716 | } |
| 717 | |
| 718 | /* The ABI says: |
| 719 | |
| 720 | Aggregate types not bigger than 8 bytes that have the same size and |
| 721 | alignment as one of the integer scalar types are returned in the |
| 722 | same registers as the integer type they match. |
| 723 | |
| 724 | For example, a 2-byte aligned structure with size 2 bytes has the |
| 725 | same size and alignment as a short int, and will be returned in R0. |
| 726 | A 4-byte aligned structure with size 8 bytes has the same size and |
| 727 | alignment as a long long int, and will be returned in R0 and R1. |
| 728 | |
| 729 | When an aggregate type is returned in R0 and R1, R0 contains the |
| 730 | first four bytes of the aggregate, and R1 contains the |
| 731 | remainder. If the size of the aggregate type is not a multiple of 4 |
| 732 | bytes, the aggregate is tail-padded up to a multiple of 4 |
| 733 | bytes. The value of the padding is undefined. For little-endian |
| 734 | targets the padding will appear at the most significant end of the |
| 735 | last element, for big-endian targets the padding appears at the |
| 736 | least significant end of the last element. |
| 737 | |
| 738 | All other aggregate types are returned by address. The caller |
| 739 | function passes the address of an area large enough to hold the |
| 740 | aggregate value in R2. The called function stores the result in |
| 741 | this location. |
| 742 | |
| 743 | To reiterate, structs smaller than 8 bytes could also be returned |
| 744 | in memory, if they don't pass the "same size and alignment as an |
| 745 | integer type" rule. |
| 746 | |
| 747 | For example, in |
| 748 | |
| 749 | struct s { char c[3]; } wibble; |
| 750 | struct s foo(void) { return wibble; } |
| 751 | |
| 752 | the return value from foo() will be in memory, not |
| 753 | in R0, because there is no 3-byte integer type. |
| 754 | |
| 755 | Similarly, in |
| 756 | |
| 757 | struct s { char c[2]; } wibble; |
| 758 | struct s foo(void) { return wibble; } |
| 759 | |
| 760 | because a struct containing two chars has alignment 1, that matches |
| 761 | type char, but size 2, that matches type short. There's no integer |
| 762 | type that has alignment 1 and size 2, so the struct is returned in |
| 763 | memory. |
| 764 | |
| 765 | */ |
| 766 | |
| 767 | static int |
| 768 | sh_use_struct_convention (int gcc_p, struct type *type) |
| 769 | { |
| 770 | int len = TYPE_LENGTH (type); |
| 771 | int nelem = TYPE_NFIELDS (type); |
| 772 | |
| 773 | /* Non-power of 2 length types and types bigger than 8 bytes (which don't |
| 774 | fit in two registers anyway) use struct convention. */ |
| 775 | if (len != 1 && len != 2 && len != 4 && len != 8) |
| 776 | return 1; |
| 777 | |
| 778 | /* Scalar types and aggregate types with exactly one field are aligned |
| 779 | by definition. They are returned in registers. */ |
| 780 | if (nelem <= 1) |
| 781 | return 0; |
| 782 | |
| 783 | /* If the first field in the aggregate has the same length as the entire |
| 784 | aggregate type, the type is returned in registers. */ |
| 785 | if (TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == len) |
| 786 | return 0; |
| 787 | |
| 788 | /* If the size of the aggregate is 8 bytes and the first field is |
| 789 | of size 4 bytes its alignment is equal to long long's alignment, |
| 790 | so it's returned in registers. */ |
| 791 | if (len == 8 && TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4) |
| 792 | return 0; |
| 793 | |
| 794 | /* Otherwise use struct convention. */ |
| 795 | return 1; |
| 796 | } |
| 797 | |
| 798 | /* Extract from an array REGBUF containing the (raw) register state |
| 799 | the address in which a function should return its structure value, |
| 800 | as a CORE_ADDR (or an expression that can be used as one). */ |
| 801 | static CORE_ADDR |
| 802 | sh_extract_struct_value_address (struct regcache *regcache) |
| 803 | { |
| 804 | ULONGEST addr; |
| 805 | |
| 806 | regcache_cooked_read_unsigned (regcache, STRUCT_RETURN_REGNUM, &addr); |
| 807 | return addr; |
| 808 | } |
| 809 | |
| 810 | static CORE_ADDR |
| 811 | sh_frame_align (struct gdbarch *ignore, CORE_ADDR sp) |
| 812 | { |
| 813 | return sp & ~3; |
| 814 | } |
| 815 | |
| 816 | /* Function: push_dummy_call (formerly push_arguments) |
| 817 | Setup the function arguments for calling a function in the inferior. |
| 818 | |
| 819 | On the Renesas SH architecture, there are four registers (R4 to R7) |
| 820 | which are dedicated for passing function arguments. Up to the first |
| 821 | four arguments (depending on size) may go into these registers. |
| 822 | The rest go on the stack. |
| 823 | |
| 824 | MVS: Except on SH variants that have floating point registers. |
| 825 | In that case, float and double arguments are passed in the same |
| 826 | manner, but using FP registers instead of GP registers. |
| 827 | |
| 828 | Arguments that are smaller than 4 bytes will still take up a whole |
| 829 | register or a whole 32-bit word on the stack, and will be |
| 830 | right-justified in the register or the stack word. This includes |
| 831 | chars, shorts, and small aggregate types. |
| 832 | |
| 833 | Arguments that are larger than 4 bytes may be split between two or |
| 834 | more registers. If there are not enough registers free, an argument |
| 835 | may be passed partly in a register (or registers), and partly on the |
| 836 | stack. This includes doubles, long longs, and larger aggregates. |
| 837 | As far as I know, there is no upper limit to the size of aggregates |
| 838 | that will be passed in this way; in other words, the convention of |
| 839 | passing a pointer to a large aggregate instead of a copy is not used. |
| 840 | |
| 841 | MVS: The above appears to be true for the SH variants that do not |
| 842 | have an FPU, however those that have an FPU appear to copy the |
| 843 | aggregate argument onto the stack (and not place it in registers) |
| 844 | if it is larger than 16 bytes (four GP registers). |
| 845 | |
| 846 | An exceptional case exists for struct arguments (and possibly other |
| 847 | aggregates such as arrays) if the size is larger than 4 bytes but |
| 848 | not a multiple of 4 bytes. In this case the argument is never split |
| 849 | between the registers and the stack, but instead is copied in its |
| 850 | entirety onto the stack, AND also copied into as many registers as |
| 851 | there is room for. In other words, space in registers permitting, |
| 852 | two copies of the same argument are passed in. As far as I can tell, |
| 853 | only the one on the stack is used, although that may be a function |
| 854 | of the level of compiler optimization. I suspect this is a compiler |
| 855 | bug. Arguments of these odd sizes are left-justified within the |
| 856 | word (as opposed to arguments smaller than 4 bytes, which are |
| 857 | right-justified). |
| 858 | |
| 859 | If the function is to return an aggregate type such as a struct, it |
| 860 | is either returned in the normal return value register R0 (if its |
| 861 | size is no greater than one byte), or else the caller must allocate |
| 862 | space into which the callee will copy the return value (if the size |
| 863 | is greater than one byte). In this case, a pointer to the return |
| 864 | value location is passed into the callee in register R2, which does |
| 865 | not displace any of the other arguments passed in via registers R4 |
| 866 | to R7. */ |
| 867 | |
| 868 | /* Helper function to justify value in register according to endianess. */ |
| 869 | static char * |
| 870 | sh_justify_value_in_reg (struct value *val, int len) |
| 871 | { |
| 872 | static char valbuf[4]; |
| 873 | |
| 874 | memset (valbuf, 0, sizeof (valbuf)); |
| 875 | if (len < 4) |
| 876 | { |
| 877 | /* value gets right-justified in the register or stack word */ |
| 878 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| 879 | memcpy (valbuf + (4 - len), (char *) VALUE_CONTENTS (val), len); |
| 880 | else |
| 881 | memcpy (valbuf, (char *) VALUE_CONTENTS (val), len); |
| 882 | return valbuf; |
| 883 | } |
| 884 | return (char *) VALUE_CONTENTS (val); |
| 885 | } |
| 886 | |
| 887 | /* Helper function to eval number of bytes to allocate on stack. */ |
| 888 | static CORE_ADDR |
| 889 | sh_stack_allocsize (int nargs, struct value **args) |
| 890 | { |
| 891 | int stack_alloc = 0; |
| 892 | while (nargs-- > 0) |
| 893 | stack_alloc += ((TYPE_LENGTH (value_type (args[nargs])) + 3) & ~3); |
| 894 | return stack_alloc; |
| 895 | } |
| 896 | |
| 897 | /* Helper functions for getting the float arguments right. Registers usage |
| 898 | depends on the ABI and the endianess. The comments should enlighten how |
| 899 | it's intended to work. */ |
| 900 | |
| 901 | /* This array stores which of the float arg registers are already in use. */ |
| 902 | static int flt_argreg_array[FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM + 1]; |
| 903 | |
| 904 | /* This function just resets the above array to "no reg used so far". */ |
| 905 | static void |
| 906 | sh_init_flt_argreg (void) |
| 907 | { |
| 908 | memset (flt_argreg_array, 0, sizeof flt_argreg_array); |
| 909 | } |
| 910 | |
| 911 | /* This function returns the next register to use for float arg passing. |
| 912 | It returns either a valid value between FLOAT_ARG0_REGNUM and |
| 913 | FLOAT_ARGLAST_REGNUM if a register is available, otherwise it returns |
| 914 | FLOAT_ARGLAST_REGNUM + 1 to indicate that no register is available. |
| 915 | |
| 916 | Note that register number 0 in flt_argreg_array corresponds with the |
| 917 | real float register fr4. In contrast to FLOAT_ARG0_REGNUM (value is |
| 918 | 29) the parity of the register number is preserved, which is important |
| 919 | for the double register passing test (see the "argreg & 1" test below). */ |
| 920 | static int |
| 921 | sh_next_flt_argreg (int len) |
| 922 | { |
| 923 | int argreg; |
| 924 | |
| 925 | /* First search for the next free register. */ |
| 926 | for (argreg = 0; argreg <= FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM; |
| 927 | ++argreg) |
| 928 | if (!flt_argreg_array[argreg]) |
| 929 | break; |
| 930 | |
| 931 | /* No register left? */ |
| 932 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 933 | return FLOAT_ARGLAST_REGNUM + 1; |
| 934 | |
| 935 | if (len == 8) |
| 936 | { |
| 937 | /* Doubles are always starting in a even register number. */ |
| 938 | if (argreg & 1) |
| 939 | { |
| 940 | flt_argreg_array[argreg] = 1; |
| 941 | |
| 942 | ++argreg; |
| 943 | |
| 944 | /* No register left? */ |
| 945 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 946 | return FLOAT_ARGLAST_REGNUM + 1; |
| 947 | } |
| 948 | /* Also mark the next register as used. */ |
| 949 | flt_argreg_array[argreg + 1] = 1; |
| 950 | } |
| 951 | else if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE) |
| 952 | { |
| 953 | /* In little endian, gcc passes floats like this: f5, f4, f7, f6, ... */ |
| 954 | if (!flt_argreg_array[argreg + 1]) |
| 955 | ++argreg; |
| 956 | } |
| 957 | flt_argreg_array[argreg] = 1; |
| 958 | return FLOAT_ARG0_REGNUM + argreg; |
| 959 | } |
| 960 | |
| 961 | /* Helper function which figures out, if a type is treated like a float type. |
| 962 | |
| 963 | The FPU ABIs have a special way how to treat types as float types. |
| 964 | Structures with exactly one member, which is of type float or double, are |
| 965 | treated exactly as the base types float or double: |
| 966 | |
| 967 | struct sf { |
| 968 | float f; |
| 969 | }; |
| 970 | |
| 971 | struct sd { |
| 972 | double d; |
| 973 | }; |
| 974 | |
| 975 | are handled the same way as just |
| 976 | |
| 977 | float f; |
| 978 | |
| 979 | double d; |
| 980 | |
| 981 | As a result, arguments of these struct types are pushed into floating point |
| 982 | registers exactly as floats or doubles, using the same decision algorithm. |
| 983 | |
| 984 | The same is valid if these types are used as function return types. The |
| 985 | above structs are returned in fr0 resp. fr0,fr1 instead of in r0, r0,r1 |
| 986 | or even using struct convention as it is for other structs. */ |
| 987 | |
| 988 | static int |
| 989 | sh_treat_as_flt_p (struct type *type) |
| 990 | { |
| 991 | int len = TYPE_LENGTH (type); |
| 992 | |
| 993 | /* Ordinary float types are obviously treated as float. */ |
| 994 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 995 | return 1; |
| 996 | /* Otherwise non-struct types are not treated as float. */ |
| 997 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT) |
| 998 | return 0; |
| 999 | /* Otherwise structs with more than one memeber are not treated as float. */ |
| 1000 | if (TYPE_NFIELDS (type) != 1) |
| 1001 | return 0; |
| 1002 | /* Otherwise if the type of that member is float, the whole type is |
| 1003 | treated as float. */ |
| 1004 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_FLT) |
| 1005 | return 1; |
| 1006 | /* Otherwise it's not treated as float. */ |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | static CORE_ADDR |
| 1011 | sh_push_dummy_call_fpu (struct gdbarch *gdbarch, |
| 1012 | struct value *function, |
| 1013 | struct regcache *regcache, |
| 1014 | CORE_ADDR bp_addr, int nargs, |
| 1015 | struct value **args, |
| 1016 | CORE_ADDR sp, int struct_return, |
| 1017 | CORE_ADDR struct_addr) |
| 1018 | { |
| 1019 | int stack_offset = 0; |
| 1020 | int argreg = ARG0_REGNUM; |
| 1021 | int flt_argreg = 0; |
| 1022 | int argnum; |
| 1023 | struct type *type; |
| 1024 | CORE_ADDR regval; |
| 1025 | char *val; |
| 1026 | int len, reg_size = 0; |
| 1027 | int pass_on_stack = 0; |
| 1028 | int treat_as_flt; |
| 1029 | |
| 1030 | /* first force sp to a 4-byte alignment */ |
| 1031 | sp = sh_frame_align (gdbarch, sp); |
| 1032 | |
| 1033 | if (struct_return) |
| 1034 | regcache_cooked_write_unsigned (regcache, |
| 1035 | STRUCT_RETURN_REGNUM, struct_addr); |
| 1036 | |
| 1037 | /* make room on stack for args */ |
| 1038 | sp -= sh_stack_allocsize (nargs, args); |
| 1039 | |
| 1040 | /* Initialize float argument mechanism. */ |
| 1041 | sh_init_flt_argreg (); |
| 1042 | |
| 1043 | /* Now load as many as possible of the first arguments into |
| 1044 | registers, and push the rest onto the stack. There are 16 bytes |
| 1045 | in four registers available. Loop thru args from first to last. */ |
| 1046 | for (argnum = 0; argnum < nargs; argnum++) |
| 1047 | { |
| 1048 | type = value_type (args[argnum]); |
| 1049 | len = TYPE_LENGTH (type); |
| 1050 | val = sh_justify_value_in_reg (args[argnum], len); |
| 1051 | |
| 1052 | /* Some decisions have to be made how various types are handled. |
| 1053 | This also differs in different ABIs. */ |
| 1054 | pass_on_stack = 0; |
| 1055 | |
| 1056 | /* Find out the next register to use for a floating point value. */ |
| 1057 | treat_as_flt = sh_treat_as_flt_p (type); |
| 1058 | if (treat_as_flt) |
| 1059 | flt_argreg = sh_next_flt_argreg (len); |
| 1060 | /* In contrast to non-FPU CPUs, arguments are never split between |
| 1061 | registers and stack. If an argument doesn't fit in the remaining |
| 1062 | registers it's always pushed entirely on the stack. */ |
| 1063 | else if (len > ((ARGLAST_REGNUM - argreg + 1) * 4)) |
| 1064 | pass_on_stack = 1; |
| 1065 | |
| 1066 | while (len > 0) |
| 1067 | { |
| 1068 | if ((treat_as_flt && flt_argreg > FLOAT_ARGLAST_REGNUM) |
| 1069 | || (!treat_as_flt && (argreg > ARGLAST_REGNUM |
| 1070 | || pass_on_stack))) |
| 1071 | { |
| 1072 | /* The data goes entirely on the stack, 4-byte aligned. */ |
| 1073 | reg_size = (len + 3) & ~3; |
| 1074 | write_memory (sp + stack_offset, val, reg_size); |
| 1075 | stack_offset += reg_size; |
| 1076 | } |
| 1077 | else if (treat_as_flt && flt_argreg <= FLOAT_ARGLAST_REGNUM) |
| 1078 | { |
| 1079 | /* Argument goes in a float argument register. */ |
| 1080 | reg_size = register_size (gdbarch, flt_argreg); |
| 1081 | regval = extract_unsigned_integer (val, reg_size); |
| 1082 | /* In little endian mode, float types taking two registers |
| 1083 | (doubles on sh4, long doubles on sh2e, sh3e and sh4) must |
| 1084 | be stored swapped in the argument registers. The below |
| 1085 | code first writes the first 32 bits in the next but one |
| 1086 | register, increments the val and len values accordingly |
| 1087 | and then proceeds as normal by writing the second 32 bits |
| 1088 | into the next register. */ |
| 1089 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE |
| 1090 | && TYPE_LENGTH (type) == 2 * reg_size) |
| 1091 | { |
| 1092 | regcache_cooked_write_unsigned (regcache, flt_argreg + 1, |
| 1093 | regval); |
| 1094 | val += reg_size; |
| 1095 | len -= reg_size; |
| 1096 | regval = extract_unsigned_integer (val, reg_size); |
| 1097 | } |
| 1098 | regcache_cooked_write_unsigned (regcache, flt_argreg++, regval); |
| 1099 | } |
| 1100 | else if (!treat_as_flt && argreg <= ARGLAST_REGNUM) |
| 1101 | { |
| 1102 | /* there's room in a register */ |
| 1103 | reg_size = register_size (gdbarch, argreg); |
| 1104 | regval = extract_unsigned_integer (val, reg_size); |
| 1105 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 1106 | } |
| 1107 | /* Store the value one register at a time or in one step on stack. */ |
| 1108 | len -= reg_size; |
| 1109 | val += reg_size; |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | /* Store return address. */ |
| 1114 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 1115 | |
| 1116 | /* Update stack pointer. */ |
| 1117 | regcache_cooked_write_unsigned (regcache, SP_REGNUM, sp); |
| 1118 | |
| 1119 | return sp; |
| 1120 | } |
| 1121 | |
| 1122 | static CORE_ADDR |
| 1123 | sh_push_dummy_call_nofpu (struct gdbarch *gdbarch, |
| 1124 | struct value *function, |
| 1125 | struct regcache *regcache, |
| 1126 | CORE_ADDR bp_addr, |
| 1127 | int nargs, struct value **args, |
| 1128 | CORE_ADDR sp, int struct_return, |
| 1129 | CORE_ADDR struct_addr) |
| 1130 | { |
| 1131 | int stack_offset = 0; |
| 1132 | int argreg = ARG0_REGNUM; |
| 1133 | int argnum; |
| 1134 | struct type *type; |
| 1135 | CORE_ADDR regval; |
| 1136 | char *val; |
| 1137 | int len, reg_size; |
| 1138 | |
| 1139 | /* first force sp to a 4-byte alignment */ |
| 1140 | sp = sh_frame_align (gdbarch, sp); |
| 1141 | |
| 1142 | if (struct_return) |
| 1143 | regcache_cooked_write_unsigned (regcache, |
| 1144 | STRUCT_RETURN_REGNUM, struct_addr); |
| 1145 | |
| 1146 | /* make room on stack for args */ |
| 1147 | sp -= sh_stack_allocsize (nargs, args); |
| 1148 | |
| 1149 | /* Now load as many as possible of the first arguments into |
| 1150 | registers, and push the rest onto the stack. There are 16 bytes |
| 1151 | in four registers available. Loop thru args from first to last. */ |
| 1152 | for (argnum = 0; argnum < nargs; argnum++) |
| 1153 | { |
| 1154 | type = value_type (args[argnum]); |
| 1155 | len = TYPE_LENGTH (type); |
| 1156 | val = sh_justify_value_in_reg (args[argnum], len); |
| 1157 | |
| 1158 | while (len > 0) |
| 1159 | { |
| 1160 | if (argreg > ARGLAST_REGNUM) |
| 1161 | { |
| 1162 | /* The remainder of the data goes entirely on the stack, |
| 1163 | 4-byte aligned. */ |
| 1164 | reg_size = (len + 3) & ~3; |
| 1165 | write_memory (sp + stack_offset, val, reg_size); |
| 1166 | stack_offset += reg_size; |
| 1167 | } |
| 1168 | else if (argreg <= ARGLAST_REGNUM) |
| 1169 | { |
| 1170 | /* there's room in a register */ |
| 1171 | reg_size = register_size (gdbarch, argreg); |
| 1172 | regval = extract_unsigned_integer (val, reg_size); |
| 1173 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 1174 | } |
| 1175 | /* Store the value reg_size bytes at a time. This means that things |
| 1176 | larger than reg_size bytes may go partly in registers and partly |
| 1177 | on the stack. */ |
| 1178 | len -= reg_size; |
| 1179 | val += reg_size; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | /* Store return address. */ |
| 1184 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 1185 | |
| 1186 | /* Update stack pointer. */ |
| 1187 | regcache_cooked_write_unsigned (regcache, SP_REGNUM, sp); |
| 1188 | |
| 1189 | return sp; |
| 1190 | } |
| 1191 | |
| 1192 | /* Find a function's return value in the appropriate registers (in |
| 1193 | regbuf), and copy it into valbuf. Extract from an array REGBUF |
| 1194 | containing the (raw) register state a function return value of type |
| 1195 | TYPE, and copy that, in virtual format, into VALBUF. */ |
| 1196 | static void |
| 1197 | sh_default_extract_return_value (struct type *type, struct regcache *regcache, |
| 1198 | void *valbuf) |
| 1199 | { |
| 1200 | int len = TYPE_LENGTH (type); |
| 1201 | int return_register = R0_REGNUM; |
| 1202 | int offset; |
| 1203 | |
| 1204 | if (len <= 4) |
| 1205 | { |
| 1206 | ULONGEST c; |
| 1207 | |
| 1208 | regcache_cooked_read_unsigned (regcache, R0_REGNUM, &c); |
| 1209 | store_unsigned_integer (valbuf, len, c); |
| 1210 | } |
| 1211 | else if (len == 8) |
| 1212 | { |
| 1213 | int i, regnum = R0_REGNUM; |
| 1214 | for (i = 0; i < len; i += 4) |
| 1215 | regcache_raw_read (regcache, regnum++, (char *) valbuf + i); |
| 1216 | } |
| 1217 | else |
| 1218 | error ("bad size for return value"); |
| 1219 | } |
| 1220 | |
| 1221 | static void |
| 1222 | sh3e_sh4_extract_return_value (struct type *type, struct regcache *regcache, |
| 1223 | void *valbuf) |
| 1224 | { |
| 1225 | if (sh_treat_as_flt_p (type)) |
| 1226 | { |
| 1227 | int len = TYPE_LENGTH (type); |
| 1228 | int i, regnum = FP0_REGNUM; |
| 1229 | for (i = 0; i < len; i += 4) |
| 1230 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE) |
| 1231 | regcache_raw_read (regcache, regnum++, (char *) valbuf + len - 4 - i); |
| 1232 | else |
| 1233 | regcache_raw_read (regcache, regnum++, (char *) valbuf + i); |
| 1234 | } |
| 1235 | else |
| 1236 | sh_default_extract_return_value (type, regcache, valbuf); |
| 1237 | } |
| 1238 | |
| 1239 | /* Write into appropriate registers a function return value |
| 1240 | of type TYPE, given in virtual format. |
| 1241 | If the architecture is sh4 or sh3e, store a function's return value |
| 1242 | in the R0 general register or in the FP0 floating point register, |
| 1243 | depending on the type of the return value. In all the other cases |
| 1244 | the result is stored in r0, left-justified. */ |
| 1245 | static void |
| 1246 | sh_default_store_return_value (struct type *type, struct regcache *regcache, |
| 1247 | const void *valbuf) |
| 1248 | { |
| 1249 | ULONGEST val; |
| 1250 | int len = TYPE_LENGTH (type); |
| 1251 | |
| 1252 | if (len <= 4) |
| 1253 | { |
| 1254 | val = extract_unsigned_integer (valbuf, len); |
| 1255 | regcache_cooked_write_unsigned (regcache, R0_REGNUM, val); |
| 1256 | } |
| 1257 | else |
| 1258 | { |
| 1259 | int i, regnum = R0_REGNUM; |
| 1260 | for (i = 0; i < len; i += 4) |
| 1261 | regcache_raw_write (regcache, regnum++, (char *) valbuf + i); |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | static void |
| 1266 | sh3e_sh4_store_return_value (struct type *type, struct regcache *regcache, |
| 1267 | const void *valbuf) |
| 1268 | { |
| 1269 | if (sh_treat_as_flt_p (type)) |
| 1270 | { |
| 1271 | int len = TYPE_LENGTH (type); |
| 1272 | int i, regnum = FP0_REGNUM; |
| 1273 | for (i = 0; i < len; i += 4) |
| 1274 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE) |
| 1275 | regcache_raw_write (regcache, regnum++, |
| 1276 | (char *) valbuf + len - 4 - i); |
| 1277 | else |
| 1278 | regcache_raw_write (regcache, regnum++, (char *) valbuf + i); |
| 1279 | } |
| 1280 | else |
| 1281 | sh_default_store_return_value (type, regcache, valbuf); |
| 1282 | } |
| 1283 | |
| 1284 | static enum return_value_convention |
| 1285 | sh_return_value_nofpu (struct gdbarch *gdbarch, struct type *type, |
| 1286 | struct regcache *regcache, |
| 1287 | void *readbuf, const void *writebuf) |
| 1288 | { |
| 1289 | if (sh_use_struct_convention (0, type)) |
| 1290 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 1291 | if (writebuf) |
| 1292 | sh_default_store_return_value (type, regcache, writebuf); |
| 1293 | else if (readbuf) |
| 1294 | sh_default_extract_return_value (type, regcache, readbuf); |
| 1295 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1296 | } |
| 1297 | |
| 1298 | static enum return_value_convention |
| 1299 | sh_return_value_fpu (struct gdbarch *gdbarch, struct type *type, |
| 1300 | struct regcache *regcache, |
| 1301 | void *readbuf, const void *writebuf) |
| 1302 | { |
| 1303 | if (sh_use_struct_convention (0, type)) |
| 1304 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 1305 | if (writebuf) |
| 1306 | sh3e_sh4_store_return_value (type, regcache, writebuf); |
| 1307 | else if (readbuf) |
| 1308 | sh3e_sh4_extract_return_value (type, regcache, readbuf); |
| 1309 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 1310 | } |
| 1311 | |
| 1312 | /* Print the registers in a form similar to the E7000 */ |
| 1313 | |
| 1314 | static void |
| 1315 | sh_generic_show_regs (void) |
| 1316 | { |
| 1317 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1318 | paddr (read_register (PC_REGNUM)), |
| 1319 | (long) read_register (SR_REGNUM), |
| 1320 | (long) read_register (PR_REGNUM), |
| 1321 | (long) read_register (MACH_REGNUM), |
| 1322 | (long) read_register (MACL_REGNUM)); |
| 1323 | |
| 1324 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1325 | (long) read_register (GBR_REGNUM), |
| 1326 | (long) read_register (VBR_REGNUM)); |
| 1327 | |
| 1328 | printf_filtered |
| 1329 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1330 | (long) read_register (0), (long) read_register (1), |
| 1331 | (long) read_register (2), (long) read_register (3), |
| 1332 | (long) read_register (4), (long) read_register (5), |
| 1333 | (long) read_register (6), (long) read_register (7)); |
| 1334 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1335 | (long) read_register (8), (long) read_register (9), |
| 1336 | (long) read_register (10), (long) read_register (11), |
| 1337 | (long) read_register (12), (long) read_register (13), |
| 1338 | (long) read_register (14), (long) read_register (15)); |
| 1339 | } |
| 1340 | |
| 1341 | static void |
| 1342 | sh3_show_regs (void) |
| 1343 | { |
| 1344 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1345 | paddr (read_register (PC_REGNUM)), |
| 1346 | (long) read_register (SR_REGNUM), |
| 1347 | (long) read_register (PR_REGNUM), |
| 1348 | (long) read_register (MACH_REGNUM), |
| 1349 | (long) read_register (MACL_REGNUM)); |
| 1350 | |
| 1351 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1352 | (long) read_register (GBR_REGNUM), |
| 1353 | (long) read_register (VBR_REGNUM)); |
| 1354 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1355 | (long) read_register (SSR_REGNUM), |
| 1356 | (long) read_register (SPC_REGNUM)); |
| 1357 | |
| 1358 | printf_filtered |
| 1359 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1360 | (long) read_register (0), (long) read_register (1), |
| 1361 | (long) read_register (2), (long) read_register (3), |
| 1362 | (long) read_register (4), (long) read_register (5), |
| 1363 | (long) read_register (6), (long) read_register (7)); |
| 1364 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1365 | (long) read_register (8), (long) read_register (9), |
| 1366 | (long) read_register (10), (long) read_register (11), |
| 1367 | (long) read_register (12), (long) read_register (13), |
| 1368 | (long) read_register (14), (long) read_register (15)); |
| 1369 | } |
| 1370 | |
| 1371 | |
| 1372 | static void |
| 1373 | sh2e_show_regs (void) |
| 1374 | { |
| 1375 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1376 | paddr (read_register (PC_REGNUM)), |
| 1377 | (long) read_register (SR_REGNUM), |
| 1378 | (long) read_register (PR_REGNUM), |
| 1379 | (long) read_register (MACH_REGNUM), |
| 1380 | (long) read_register (MACL_REGNUM)); |
| 1381 | |
| 1382 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1383 | (long) read_register (GBR_REGNUM), |
| 1384 | (long) read_register (VBR_REGNUM)); |
| 1385 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1386 | (long) read_register (FPUL_REGNUM), |
| 1387 | (long) read_register (FPSCR_REGNUM)); |
| 1388 | |
| 1389 | printf_filtered |
| 1390 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1391 | (long) read_register (0), (long) read_register (1), |
| 1392 | (long) read_register (2), (long) read_register (3), |
| 1393 | (long) read_register (4), (long) read_register (5), |
| 1394 | (long) read_register (6), (long) read_register (7)); |
| 1395 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1396 | (long) read_register (8), (long) read_register (9), |
| 1397 | (long) read_register (10), (long) read_register (11), |
| 1398 | (long) read_register (12), (long) read_register (13), |
| 1399 | (long) read_register (14), (long) read_register (15)); |
| 1400 | |
| 1401 | printf_filtered (("FP0-FP7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), (long) read_register (FP0_REGNUM + 0), (long) read_register (FP0_REGNUM + 1), (long) read_register (FP0_REGNUM + 2), (long) read_register (FP0_REGNUM + 3), (long) read_register (FP0_REGNUM + 4), (long) read_register (FP0_REGNUM + 5), (long) read_register (FP0_REGNUM + 6), (long) read_register (FP0_REGNUM + 7)); |
| 1402 | printf_filtered (("FP8-FP15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), (long) read_register (FP0_REGNUM + 8), (long) read_register (FP0_REGNUM + 9), (long) read_register (FP0_REGNUM + 10), (long) read_register (FP0_REGNUM + 11), (long) read_register (FP0_REGNUM + 12), (long) read_register (FP0_REGNUM + 13), (long) read_register (FP0_REGNUM + 14), (long) read_register (FP0_REGNUM + 15)); |
| 1403 | } |
| 1404 | |
| 1405 | static void |
| 1406 | sh2a_show_regs (void) |
| 1407 | { |
| 1408 | int pr = read_register (FPSCR_REGNUM) & 0x80000; |
| 1409 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1410 | paddr (read_register (PC_REGNUM)), |
| 1411 | (long) read_register (SR_REGNUM), |
| 1412 | (long) read_register (PR_REGNUM), |
| 1413 | (long) read_register (MACH_REGNUM), |
| 1414 | (long) read_register (MACL_REGNUM)); |
| 1415 | |
| 1416 | printf_filtered ("GBR=%08lx VBR=%08lx TBR=%08lx", |
| 1417 | (long) read_register (GBR_REGNUM), |
| 1418 | (long) read_register (VBR_REGNUM), |
| 1419 | (long) read_register (TBR_REGNUM)); |
| 1420 | printf_filtered (" FPUL=%08lx FPSCR=%08lx\n", |
| 1421 | (long) read_register (FPUL_REGNUM), |
| 1422 | (long) read_register (FPSCR_REGNUM)); |
| 1423 | |
| 1424 | printf_filtered ("R0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1425 | (long) read_register (0), (long) read_register (1), |
| 1426 | (long) read_register (2), (long) read_register (3), |
| 1427 | (long) read_register (4), (long) read_register (5), |
| 1428 | (long) read_register (6), (long) read_register (7)); |
| 1429 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1430 | (long) read_register (8), (long) read_register (9), |
| 1431 | (long) read_register (10), (long) read_register (11), |
| 1432 | (long) read_register (12), (long) read_register (13), |
| 1433 | (long) read_register (14), (long) read_register (15)); |
| 1434 | |
| 1435 | printf_filtered ((pr |
| 1436 | ? "DR0-DR6 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" |
| 1437 | : |
| 1438 | "FP0-FP7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1439 | (long) read_register (FP0_REGNUM + 0), |
| 1440 | (long) read_register (FP0_REGNUM + 1), |
| 1441 | (long) read_register (FP0_REGNUM + 2), |
| 1442 | (long) read_register (FP0_REGNUM + 3), |
| 1443 | (long) read_register (FP0_REGNUM + 4), |
| 1444 | (long) read_register (FP0_REGNUM + 5), |
| 1445 | (long) read_register (FP0_REGNUM + 6), |
| 1446 | (long) read_register (FP0_REGNUM + 7)); |
| 1447 | printf_filtered ((pr ? |
| 1448 | "DR8-DR14 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" : |
| 1449 | "FP8-FP15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1450 | (long) read_register (FP0_REGNUM + 8), |
| 1451 | (long) read_register (FP0_REGNUM + 9), |
| 1452 | (long) read_register (FP0_REGNUM + 10), |
| 1453 | (long) read_register (FP0_REGNUM + 11), |
| 1454 | (long) read_register (FP0_REGNUM + 12), |
| 1455 | (long) read_register (FP0_REGNUM + 13), |
| 1456 | (long) read_register (FP0_REGNUM + 14), |
| 1457 | (long) read_register (FP0_REGNUM + 15)); |
| 1458 | printf_filtered ("BANK=%-3d\n", (int) read_register (BANK_REGNUM)); |
| 1459 | printf_filtered ("R0b - R7b %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1460 | (long) read_register (R0_BANK0_REGNUM + 0), |
| 1461 | (long) read_register (R0_BANK0_REGNUM + 1), |
| 1462 | (long) read_register (R0_BANK0_REGNUM + 2), |
| 1463 | (long) read_register (R0_BANK0_REGNUM + 3), |
| 1464 | (long) read_register (R0_BANK0_REGNUM + 4), |
| 1465 | (long) read_register (R0_BANK0_REGNUM + 5), |
| 1466 | (long) read_register (R0_BANK0_REGNUM + 6), |
| 1467 | (long) read_register (R0_BANK0_REGNUM + 7)); |
| 1468 | printf_filtered ("R8b - R14b %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1469 | (long) read_register (R0_BANK0_REGNUM + 8), |
| 1470 | (long) read_register (R0_BANK0_REGNUM + 9), |
| 1471 | (long) read_register (R0_BANK0_REGNUM + 10), |
| 1472 | (long) read_register (R0_BANK0_REGNUM + 11), |
| 1473 | (long) read_register (R0_BANK0_REGNUM + 12), |
| 1474 | (long) read_register (R0_BANK0_REGNUM + 13), |
| 1475 | (long) read_register (R0_BANK0_REGNUM + 14)); |
| 1476 | printf_filtered ("MACHb=%08lx IVNb=%08lx PRb=%08lx GBRb=%08lx MACLb=%08lx\n", |
| 1477 | (long) read_register (R0_BANK0_REGNUM + 15), |
| 1478 | (long) read_register (R0_BANK0_REGNUM + 16), |
| 1479 | (long) read_register (R0_BANK0_REGNUM + 17), |
| 1480 | (long) read_register (R0_BANK0_REGNUM + 18), |
| 1481 | (long) read_register (R0_BANK0_REGNUM + 19)); |
| 1482 | } |
| 1483 | |
| 1484 | static void |
| 1485 | sh2a_nofpu_show_regs (void) |
| 1486 | { |
| 1487 | int pr = read_register (FPSCR_REGNUM) & 0x80000; |
| 1488 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1489 | paddr (read_register (PC_REGNUM)), |
| 1490 | (long) read_register (SR_REGNUM), |
| 1491 | (long) read_register (PR_REGNUM), |
| 1492 | (long) read_register (MACH_REGNUM), |
| 1493 | (long) read_register (MACL_REGNUM)); |
| 1494 | |
| 1495 | printf_filtered ("GBR=%08lx VBR=%08lx TBR=%08lx", |
| 1496 | (long) read_register (GBR_REGNUM), |
| 1497 | (long) read_register (VBR_REGNUM), |
| 1498 | (long) read_register (TBR_REGNUM)); |
| 1499 | printf_filtered (" FPUL=%08lx FPSCR=%08lx\n", |
| 1500 | (long) read_register (FPUL_REGNUM), |
| 1501 | (long) read_register (FPSCR_REGNUM)); |
| 1502 | |
| 1503 | printf_filtered ("R0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1504 | (long) read_register (0), (long) read_register (1), |
| 1505 | (long) read_register (2), (long) read_register (3), |
| 1506 | (long) read_register (4), (long) read_register (5), |
| 1507 | (long) read_register (6), (long) read_register (7)); |
| 1508 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1509 | (long) read_register (8), (long) read_register (9), |
| 1510 | (long) read_register (10), (long) read_register (11), |
| 1511 | (long) read_register (12), (long) read_register (13), |
| 1512 | (long) read_register (14), (long) read_register (15)); |
| 1513 | |
| 1514 | printf_filtered ("BANK=%-3d\n", (int) read_register (BANK_REGNUM)); |
| 1515 | printf_filtered ("R0b - R7b %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1516 | (long) read_register (R0_BANK0_REGNUM + 0), |
| 1517 | (long) read_register (R0_BANK0_REGNUM + 1), |
| 1518 | (long) read_register (R0_BANK0_REGNUM + 2), |
| 1519 | (long) read_register (R0_BANK0_REGNUM + 3), |
| 1520 | (long) read_register (R0_BANK0_REGNUM + 4), |
| 1521 | (long) read_register (R0_BANK0_REGNUM + 5), |
| 1522 | (long) read_register (R0_BANK0_REGNUM + 6), |
| 1523 | (long) read_register (R0_BANK0_REGNUM + 7)); |
| 1524 | printf_filtered ("R8b - R14b %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1525 | (long) read_register (R0_BANK0_REGNUM + 8), |
| 1526 | (long) read_register (R0_BANK0_REGNUM + 9), |
| 1527 | (long) read_register (R0_BANK0_REGNUM + 10), |
| 1528 | (long) read_register (R0_BANK0_REGNUM + 11), |
| 1529 | (long) read_register (R0_BANK0_REGNUM + 12), |
| 1530 | (long) read_register (R0_BANK0_REGNUM + 13), |
| 1531 | (long) read_register (R0_BANK0_REGNUM + 14)); |
| 1532 | printf_filtered ("MACHb=%08lx IVNb=%08lx PRb=%08lx GBRb=%08lx MACLb=%08lx\n", |
| 1533 | (long) read_register (R0_BANK0_REGNUM + 15), |
| 1534 | (long) read_register (R0_BANK0_REGNUM + 16), |
| 1535 | (long) read_register (R0_BANK0_REGNUM + 17), |
| 1536 | (long) read_register (R0_BANK0_REGNUM + 18), |
| 1537 | (long) read_register (R0_BANK0_REGNUM + 19)); |
| 1538 | } |
| 1539 | |
| 1540 | static void |
| 1541 | sh3e_show_regs (void) |
| 1542 | { |
| 1543 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1544 | paddr (read_register (PC_REGNUM)), |
| 1545 | (long) read_register (SR_REGNUM), |
| 1546 | (long) read_register (PR_REGNUM), |
| 1547 | (long) read_register (MACH_REGNUM), |
| 1548 | (long) read_register (MACL_REGNUM)); |
| 1549 | |
| 1550 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1551 | (long) read_register (GBR_REGNUM), |
| 1552 | (long) read_register (VBR_REGNUM)); |
| 1553 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1554 | (long) read_register (SSR_REGNUM), |
| 1555 | (long) read_register (SPC_REGNUM)); |
| 1556 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1557 | (long) read_register (FPUL_REGNUM), |
| 1558 | (long) read_register (FPSCR_REGNUM)); |
| 1559 | |
| 1560 | printf_filtered |
| 1561 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1562 | (long) read_register (0), (long) read_register (1), |
| 1563 | (long) read_register (2), (long) read_register (3), |
| 1564 | (long) read_register (4), (long) read_register (5), |
| 1565 | (long) read_register (6), (long) read_register (7)); |
| 1566 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1567 | (long) read_register (8), (long) read_register (9), |
| 1568 | (long) read_register (10), (long) read_register (11), |
| 1569 | (long) read_register (12), (long) read_register (13), |
| 1570 | (long) read_register (14), (long) read_register (15)); |
| 1571 | |
| 1572 | printf_filtered (("FP0-FP7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), (long) read_register (FP0_REGNUM + 0), (long) read_register (FP0_REGNUM + 1), (long) read_register (FP0_REGNUM + 2), (long) read_register (FP0_REGNUM + 3), (long) read_register (FP0_REGNUM + 4), (long) read_register (FP0_REGNUM + 5), (long) read_register (FP0_REGNUM + 6), (long) read_register (FP0_REGNUM + 7)); |
| 1573 | printf_filtered (("FP8-FP15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), (long) read_register (FP0_REGNUM + 8), (long) read_register (FP0_REGNUM + 9), (long) read_register (FP0_REGNUM + 10), (long) read_register (FP0_REGNUM + 11), (long) read_register (FP0_REGNUM + 12), (long) read_register (FP0_REGNUM + 13), (long) read_register (FP0_REGNUM + 14), (long) read_register (FP0_REGNUM + 15)); |
| 1574 | } |
| 1575 | |
| 1576 | static void |
| 1577 | sh3_dsp_show_regs (void) |
| 1578 | { |
| 1579 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1580 | paddr (read_register (PC_REGNUM)), |
| 1581 | (long) read_register (SR_REGNUM), |
| 1582 | (long) read_register (PR_REGNUM), |
| 1583 | (long) read_register (MACH_REGNUM), |
| 1584 | (long) read_register (MACL_REGNUM)); |
| 1585 | |
| 1586 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1587 | (long) read_register (GBR_REGNUM), |
| 1588 | (long) read_register (VBR_REGNUM)); |
| 1589 | |
| 1590 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1591 | (long) read_register (SSR_REGNUM), |
| 1592 | (long) read_register (SPC_REGNUM)); |
| 1593 | |
| 1594 | printf_filtered (" DSR=%08lx", (long) read_register (DSR_REGNUM)); |
| 1595 | |
| 1596 | printf_filtered |
| 1597 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1598 | (long) read_register (0), (long) read_register (1), |
| 1599 | (long) read_register (2), (long) read_register (3), |
| 1600 | (long) read_register (4), (long) read_register (5), |
| 1601 | (long) read_register (6), (long) read_register (7)); |
| 1602 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1603 | (long) read_register (8), (long) read_register (9), |
| 1604 | (long) read_register (10), (long) read_register (11), |
| 1605 | (long) read_register (12), (long) read_register (13), |
| 1606 | (long) read_register (14), (long) read_register (15)); |
| 1607 | |
| 1608 | printf_filtered |
| 1609 | ("A0G=%02lx A0=%08lx M0=%08lx X0=%08lx Y0=%08lx RS=%08lx MOD=%08lx\n", |
| 1610 | (long) read_register (A0G_REGNUM) & 0xff, |
| 1611 | (long) read_register (A0_REGNUM), (long) read_register (M0_REGNUM), |
| 1612 | (long) read_register (X0_REGNUM), (long) read_register (Y0_REGNUM), |
| 1613 | (long) read_register (RS_REGNUM), (long) read_register (MOD_REGNUM)); |
| 1614 | printf_filtered ("A1G=%02lx A1=%08lx M1=%08lx X1=%08lx Y1=%08lx RE=%08lx\n", |
| 1615 | (long) read_register (A1G_REGNUM) & 0xff, |
| 1616 | (long) read_register (A1_REGNUM), |
| 1617 | (long) read_register (M1_REGNUM), |
| 1618 | (long) read_register (X1_REGNUM), |
| 1619 | (long) read_register (Y1_REGNUM), |
| 1620 | (long) read_register (RE_REGNUM)); |
| 1621 | } |
| 1622 | |
| 1623 | static void |
| 1624 | sh4_show_regs (void) |
| 1625 | { |
| 1626 | int pr = read_register (FPSCR_REGNUM) & 0x80000; |
| 1627 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1628 | paddr (read_register (PC_REGNUM)), |
| 1629 | (long) read_register (SR_REGNUM), |
| 1630 | (long) read_register (PR_REGNUM), |
| 1631 | (long) read_register (MACH_REGNUM), |
| 1632 | (long) read_register (MACL_REGNUM)); |
| 1633 | |
| 1634 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1635 | (long) read_register (GBR_REGNUM), |
| 1636 | (long) read_register (VBR_REGNUM)); |
| 1637 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1638 | (long) read_register (SSR_REGNUM), |
| 1639 | (long) read_register (SPC_REGNUM)); |
| 1640 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1641 | (long) read_register (FPUL_REGNUM), |
| 1642 | (long) read_register (FPSCR_REGNUM)); |
| 1643 | |
| 1644 | printf_filtered |
| 1645 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1646 | (long) read_register (0), (long) read_register (1), |
| 1647 | (long) read_register (2), (long) read_register (3), |
| 1648 | (long) read_register (4), (long) read_register (5), |
| 1649 | (long) read_register (6), (long) read_register (7)); |
| 1650 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1651 | (long) read_register (8), (long) read_register (9), |
| 1652 | (long) read_register (10), (long) read_register (11), |
| 1653 | (long) read_register (12), (long) read_register (13), |
| 1654 | (long) read_register (14), (long) read_register (15)); |
| 1655 | |
| 1656 | printf_filtered ((pr |
| 1657 | ? "DR0-DR6 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" |
| 1658 | : |
| 1659 | "FP0-FP7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1660 | (long) read_register (FP0_REGNUM + 0), |
| 1661 | (long) read_register (FP0_REGNUM + 1), |
| 1662 | (long) read_register (FP0_REGNUM + 2), |
| 1663 | (long) read_register (FP0_REGNUM + 3), |
| 1664 | (long) read_register (FP0_REGNUM + 4), |
| 1665 | (long) read_register (FP0_REGNUM + 5), |
| 1666 | (long) read_register (FP0_REGNUM + 6), |
| 1667 | (long) read_register (FP0_REGNUM + 7)); |
| 1668 | printf_filtered ((pr ? |
| 1669 | "DR8-DR14 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" : |
| 1670 | "FP8-FP15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1671 | (long) read_register (FP0_REGNUM + 8), |
| 1672 | (long) read_register (FP0_REGNUM + 9), |
| 1673 | (long) read_register (FP0_REGNUM + 10), |
| 1674 | (long) read_register (FP0_REGNUM + 11), |
| 1675 | (long) read_register (FP0_REGNUM + 12), |
| 1676 | (long) read_register (FP0_REGNUM + 13), |
| 1677 | (long) read_register (FP0_REGNUM + 14), |
| 1678 | (long) read_register (FP0_REGNUM + 15)); |
| 1679 | } |
| 1680 | |
| 1681 | static void |
| 1682 | sh4_nofpu_show_regs (void) |
| 1683 | { |
| 1684 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1685 | paddr (read_register (PC_REGNUM)), |
| 1686 | (long) read_register (SR_REGNUM), |
| 1687 | (long) read_register (PR_REGNUM), |
| 1688 | (long) read_register (MACH_REGNUM), |
| 1689 | (long) read_register (MACL_REGNUM)); |
| 1690 | |
| 1691 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1692 | (long) read_register (GBR_REGNUM), |
| 1693 | (long) read_register (VBR_REGNUM)); |
| 1694 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1695 | (long) read_register (SSR_REGNUM), |
| 1696 | (long) read_register (SPC_REGNUM)); |
| 1697 | |
| 1698 | printf_filtered |
| 1699 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1700 | (long) read_register (0), (long) read_register (1), |
| 1701 | (long) read_register (2), (long) read_register (3), |
| 1702 | (long) read_register (4), (long) read_register (5), |
| 1703 | (long) read_register (6), (long) read_register (7)); |
| 1704 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1705 | (long) read_register (8), (long) read_register (9), |
| 1706 | (long) read_register (10), (long) read_register (11), |
| 1707 | (long) read_register (12), (long) read_register (13), |
| 1708 | (long) read_register (14), (long) read_register (15)); |
| 1709 | } |
| 1710 | |
| 1711 | static void |
| 1712 | sh_dsp_show_regs (void) |
| 1713 | { |
| 1714 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1715 | paddr (read_register (PC_REGNUM)), |
| 1716 | (long) read_register (SR_REGNUM), |
| 1717 | (long) read_register (PR_REGNUM), |
| 1718 | (long) read_register (MACH_REGNUM), |
| 1719 | (long) read_register (MACL_REGNUM)); |
| 1720 | |
| 1721 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1722 | (long) read_register (GBR_REGNUM), |
| 1723 | (long) read_register (VBR_REGNUM)); |
| 1724 | |
| 1725 | printf_filtered (" DSR=%08lx", (long) read_register (DSR_REGNUM)); |
| 1726 | |
| 1727 | printf_filtered |
| 1728 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1729 | (long) read_register (0), (long) read_register (1), |
| 1730 | (long) read_register (2), (long) read_register (3), |
| 1731 | (long) read_register (4), (long) read_register (5), |
| 1732 | (long) read_register (6), (long) read_register (7)); |
| 1733 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1734 | (long) read_register (8), (long) read_register (9), |
| 1735 | (long) read_register (10), (long) read_register (11), |
| 1736 | (long) read_register (12), (long) read_register (13), |
| 1737 | (long) read_register (14), (long) read_register (15)); |
| 1738 | |
| 1739 | printf_filtered |
| 1740 | ("A0G=%02lx A0=%08lx M0=%08lx X0=%08lx Y0=%08lx RS=%08lx MOD=%08lx\n", |
| 1741 | (long) read_register (A0G_REGNUM) & 0xff, |
| 1742 | (long) read_register (A0_REGNUM), (long) read_register (M0_REGNUM), |
| 1743 | (long) read_register (X0_REGNUM), (long) read_register (Y0_REGNUM), |
| 1744 | (long) read_register (RS_REGNUM), (long) read_register (MOD_REGNUM)); |
| 1745 | printf_filtered ("A1G=%02lx A1=%08lx M1=%08lx X1=%08lx Y1=%08lx RE=%08lx\n", |
| 1746 | (long) read_register (A1G_REGNUM) & 0xff, |
| 1747 | (long) read_register (A1_REGNUM), |
| 1748 | (long) read_register (M1_REGNUM), |
| 1749 | (long) read_register (X1_REGNUM), |
| 1750 | (long) read_register (Y1_REGNUM), |
| 1751 | (long) read_register (RE_REGNUM)); |
| 1752 | } |
| 1753 | |
| 1754 | static void |
| 1755 | sh_show_regs_command (char *args, int from_tty) |
| 1756 | { |
| 1757 | if (sh_show_regs) |
| 1758 | (*sh_show_regs) (); |
| 1759 | } |
| 1760 | |
| 1761 | static struct type * |
| 1762 | sh_sh2a_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1763 | { |
| 1764 | if ((reg_nr >= FP0_REGNUM |
| 1765 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1766 | return builtin_type_float; |
| 1767 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1768 | return builtin_type_double; |
| 1769 | else |
| 1770 | return builtin_type_int; |
| 1771 | } |
| 1772 | |
| 1773 | /* Return the GDB type object for the "standard" data type |
| 1774 | of data in register N. */ |
| 1775 | static struct type * |
| 1776 | sh_sh3e_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1777 | { |
| 1778 | if ((reg_nr >= FP0_REGNUM |
| 1779 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1780 | return builtin_type_float; |
| 1781 | else |
| 1782 | return builtin_type_int; |
| 1783 | } |
| 1784 | |
| 1785 | static struct type * |
| 1786 | sh_sh4_build_float_register_type (int high) |
| 1787 | { |
| 1788 | struct type *temp; |
| 1789 | |
| 1790 | temp = create_range_type (NULL, builtin_type_int, 0, high); |
| 1791 | return create_array_type (NULL, builtin_type_float, temp); |
| 1792 | } |
| 1793 | |
| 1794 | static struct type * |
| 1795 | sh_sh4_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1796 | { |
| 1797 | if ((reg_nr >= FP0_REGNUM |
| 1798 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1799 | return builtin_type_float; |
| 1800 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1801 | return builtin_type_double; |
| 1802 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1803 | return sh_sh4_build_float_register_type (3); |
| 1804 | else |
| 1805 | return builtin_type_int; |
| 1806 | } |
| 1807 | |
| 1808 | static struct type * |
| 1809 | sh_default_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1810 | { |
| 1811 | return builtin_type_int; |
| 1812 | } |
| 1813 | |
| 1814 | /* On the sh4, the DRi pseudo registers are problematic if the target |
| 1815 | is little endian. When the user writes one of those registers, for |
| 1816 | instance with 'ser var $dr0=1', we want the double to be stored |
| 1817 | like this: |
| 1818 | fr0 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f |
| 1819 | fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1820 | |
| 1821 | This corresponds to little endian byte order & big endian word |
| 1822 | order. However if we let gdb write the register w/o conversion, it |
| 1823 | will write fr0 and fr1 this way: |
| 1824 | fr0 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1825 | fr1 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f |
| 1826 | because it will consider fr0 and fr1 as a single LE stretch of memory. |
| 1827 | |
| 1828 | To achieve what we want we must force gdb to store things in |
| 1829 | floatformat_ieee_double_littlebyte_bigword (which is defined in |
| 1830 | include/floatformat.h and libiberty/floatformat.c. |
| 1831 | |
| 1832 | In case the target is big endian, there is no problem, the |
| 1833 | raw bytes will look like: |
| 1834 | fr0 = 0x3f 0xf0 0x00 0x00 0x00 0x00 0x00 |
| 1835 | fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1836 | |
| 1837 | The other pseudo registers (the FVs) also don't pose a problem |
| 1838 | because they are stored as 4 individual FP elements. */ |
| 1839 | |
| 1840 | static void |
| 1841 | sh_register_convert_to_virtual (int regnum, struct type *type, |
| 1842 | char *from, char *to) |
| 1843 | { |
| 1844 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1845 | { |
| 1846 | DOUBLEST val; |
| 1847 | floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1848 | from, &val); |
| 1849 | store_typed_floating (to, type, val); |
| 1850 | } |
| 1851 | else |
| 1852 | error |
| 1853 | ("sh_register_convert_to_virtual called with non DR register number"); |
| 1854 | } |
| 1855 | |
| 1856 | static void |
| 1857 | sh_register_convert_to_raw (struct type *type, int regnum, |
| 1858 | const void *from, void *to) |
| 1859 | { |
| 1860 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1861 | { |
| 1862 | DOUBLEST val = extract_typed_floating (from, type); |
| 1863 | floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1864 | &val, to); |
| 1865 | } |
| 1866 | else |
| 1867 | error ("sh_register_convert_to_raw called with non DR register number"); |
| 1868 | } |
| 1869 | |
| 1870 | /* For vectors of 4 floating point registers. */ |
| 1871 | static int |
| 1872 | fv_reg_base_num (int fv_regnum) |
| 1873 | { |
| 1874 | int fp_regnum; |
| 1875 | |
| 1876 | fp_regnum = FP0_REGNUM + (fv_regnum - FV0_REGNUM) * 4; |
| 1877 | return fp_regnum; |
| 1878 | } |
| 1879 | |
| 1880 | /* For double precision floating point registers, i.e 2 fp regs.*/ |
| 1881 | static int |
| 1882 | dr_reg_base_num (int dr_regnum) |
| 1883 | { |
| 1884 | int fp_regnum; |
| 1885 | |
| 1886 | fp_regnum = FP0_REGNUM + (dr_regnum - DR0_REGNUM) * 2; |
| 1887 | return fp_regnum; |
| 1888 | } |
| 1889 | |
| 1890 | static void |
| 1891 | sh_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1892 | int reg_nr, void *buffer) |
| 1893 | { |
| 1894 | int base_regnum, portion; |
| 1895 | char temp_buffer[MAX_REGISTER_SIZE]; |
| 1896 | |
| 1897 | if (reg_nr == PSEUDO_BANK_REGNUM) |
| 1898 | regcache_raw_read (regcache, BANK_REGNUM, buffer); |
| 1899 | else |
| 1900 | if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1901 | { |
| 1902 | base_regnum = dr_reg_base_num (reg_nr); |
| 1903 | |
| 1904 | /* Build the value in the provided buffer. */ |
| 1905 | /* Read the real regs for which this one is an alias. */ |
| 1906 | for (portion = 0; portion < 2; portion++) |
| 1907 | regcache_raw_read (regcache, base_regnum + portion, |
| 1908 | (temp_buffer |
| 1909 | + register_size (gdbarch, |
| 1910 | base_regnum) * portion)); |
| 1911 | /* We must pay attention to the endiannes. */ |
| 1912 | sh_register_convert_to_virtual (reg_nr, |
| 1913 | gdbarch_register_type (gdbarch, reg_nr), |
| 1914 | temp_buffer, buffer); |
| 1915 | } |
| 1916 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1917 | { |
| 1918 | base_regnum = fv_reg_base_num (reg_nr); |
| 1919 | |
| 1920 | /* Read the real regs for which this one is an alias. */ |
| 1921 | for (portion = 0; portion < 4; portion++) |
| 1922 | regcache_raw_read (regcache, base_regnum + portion, |
| 1923 | ((char *) buffer |
| 1924 | + register_size (gdbarch, |
| 1925 | base_regnum) * portion)); |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | static void |
| 1930 | sh_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1931 | int reg_nr, const void *buffer) |
| 1932 | { |
| 1933 | int base_regnum, portion; |
| 1934 | char temp_buffer[MAX_REGISTER_SIZE]; |
| 1935 | |
| 1936 | if (reg_nr == PSEUDO_BANK_REGNUM) |
| 1937 | { |
| 1938 | /* When the bank register is written to, the whole register bank |
| 1939 | is switched and all values in the bank registers must be read |
| 1940 | from the target/sim again. We're just invalidating the regcache |
| 1941 | so that a re-read happens next time it's necessary. */ |
| 1942 | int bregnum; |
| 1943 | |
| 1944 | regcache_raw_write (regcache, BANK_REGNUM, buffer); |
| 1945 | for (bregnum = R0_BANK0_REGNUM; bregnum < MACLB_REGNUM; ++bregnum) |
| 1946 | set_register_cached (bregnum, 0); |
| 1947 | } |
| 1948 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1949 | { |
| 1950 | base_regnum = dr_reg_base_num (reg_nr); |
| 1951 | |
| 1952 | /* We must pay attention to the endiannes. */ |
| 1953 | sh_register_convert_to_raw (gdbarch_register_type (gdbarch, reg_nr), |
| 1954 | reg_nr, buffer, temp_buffer); |
| 1955 | |
| 1956 | /* Write the real regs for which this one is an alias. */ |
| 1957 | for (portion = 0; portion < 2; portion++) |
| 1958 | regcache_raw_write (regcache, base_regnum + portion, |
| 1959 | (temp_buffer |
| 1960 | + register_size (gdbarch, |
| 1961 | base_regnum) * portion)); |
| 1962 | } |
| 1963 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1964 | { |
| 1965 | base_regnum = fv_reg_base_num (reg_nr); |
| 1966 | |
| 1967 | /* Write the real regs for which this one is an alias. */ |
| 1968 | for (portion = 0; portion < 4; portion++) |
| 1969 | regcache_raw_write (regcache, base_regnum + portion, |
| 1970 | ((char *) buffer |
| 1971 | + register_size (gdbarch, |
| 1972 | base_regnum) * portion)); |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | /* Floating point vector of 4 float registers. */ |
| 1977 | static void |
| 1978 | do_fv_register_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 1979 | int fv_regnum) |
| 1980 | { |
| 1981 | int first_fp_reg_num = fv_reg_base_num (fv_regnum); |
| 1982 | fprintf_filtered (file, "fv%d\t0x%08x\t0x%08x\t0x%08x\t0x%08x\n", |
| 1983 | fv_regnum - FV0_REGNUM, |
| 1984 | (int) read_register (first_fp_reg_num), |
| 1985 | (int) read_register (first_fp_reg_num + 1), |
| 1986 | (int) read_register (first_fp_reg_num + 2), |
| 1987 | (int) read_register (first_fp_reg_num + 3)); |
| 1988 | } |
| 1989 | |
| 1990 | /* Double precision registers. */ |
| 1991 | static void |
| 1992 | do_dr_register_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 1993 | int dr_regnum) |
| 1994 | { |
| 1995 | int first_fp_reg_num = dr_reg_base_num (dr_regnum); |
| 1996 | |
| 1997 | fprintf_filtered (file, "dr%d\t0x%08x%08x\n", |
| 1998 | dr_regnum - DR0_REGNUM, |
| 1999 | (int) read_register (first_fp_reg_num), |
| 2000 | (int) read_register (first_fp_reg_num + 1)); |
| 2001 | } |
| 2002 | static void |
| 2003 | do_bank_register_info (struct gdbarch *gdbarch, struct ui_file *file) |
| 2004 | { |
| 2005 | fprintf_filtered (file, "bank %d\n", |
| 2006 | (int) read_register (BANK_REGNUM)); |
| 2007 | } |
| 2008 | |
| 2009 | static void |
| 2010 | sh_print_pseudo_register (struct gdbarch *gdbarch, struct ui_file *file, |
| 2011 | int regnum) |
| 2012 | { |
| 2013 | if (regnum < NUM_REGS || regnum >= NUM_REGS + NUM_PSEUDO_REGS) |
| 2014 | internal_error (__FILE__, __LINE__, |
| 2015 | "Invalid pseudo register number %d\n", regnum); |
| 2016 | else if (regnum == PSEUDO_BANK_REGNUM) |
| 2017 | do_bank_register_info (gdbarch, file); |
| 2018 | else if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 2019 | do_dr_register_info (gdbarch, file, regnum); |
| 2020 | else if (regnum >= FV0_REGNUM && regnum <= FV_LAST_REGNUM) |
| 2021 | do_fv_register_info (gdbarch, file, regnum); |
| 2022 | } |
| 2023 | |
| 2024 | static void |
| 2025 | sh_do_fp_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 2026 | { /* do values for FP (float) regs */ |
| 2027 | char *raw_buffer; |
| 2028 | double flt; /* double extracted from raw hex data */ |
| 2029 | int inv; |
| 2030 | int j; |
| 2031 | |
| 2032 | /* Allocate space for the float. */ |
| 2033 | raw_buffer = (char *) alloca (register_size (gdbarch, FP0_REGNUM)); |
| 2034 | |
| 2035 | /* Get the data in raw format. */ |
| 2036 | if (!frame_register_read (get_selected_frame (NULL), regnum, raw_buffer)) |
| 2037 | error ("can't read register %d (%s)", regnum, REGISTER_NAME (regnum)); |
| 2038 | |
| 2039 | /* Get the register as a number */ |
| 2040 | flt = unpack_double (builtin_type_float, raw_buffer, &inv); |
| 2041 | |
| 2042 | /* Print the name and some spaces. */ |
| 2043 | fputs_filtered (REGISTER_NAME (regnum), file); |
| 2044 | print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file); |
| 2045 | |
| 2046 | /* Print the value. */ |
| 2047 | if (inv) |
| 2048 | fprintf_filtered (file, "<invalid float>"); |
| 2049 | else |
| 2050 | fprintf_filtered (file, "%-10.9g", flt); |
| 2051 | |
| 2052 | /* Print the fp register as hex. */ |
| 2053 | fprintf_filtered (file, "\t(raw 0x"); |
| 2054 | for (j = 0; j < register_size (gdbarch, regnum); j++) |
| 2055 | { |
| 2056 | int idx = (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG |
| 2057 | ? j |
| 2058 | : register_size (gdbarch, regnum) - 1 - j); |
| 2059 | fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]); |
| 2060 | } |
| 2061 | fprintf_filtered (file, ")"); |
| 2062 | fprintf_filtered (file, "\n"); |
| 2063 | } |
| 2064 | |
| 2065 | static void |
| 2066 | sh_do_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 2067 | { |
| 2068 | char raw_buffer[MAX_REGISTER_SIZE]; |
| 2069 | |
| 2070 | fputs_filtered (REGISTER_NAME (regnum), file); |
| 2071 | print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file); |
| 2072 | |
| 2073 | /* Get the data in raw format. */ |
| 2074 | if (!frame_register_read (get_selected_frame (NULL), regnum, raw_buffer)) |
| 2075 | fprintf_filtered (file, "*value not available*\n"); |
| 2076 | |
| 2077 | val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0, |
| 2078 | file, 'x', 1, 0, Val_pretty_default); |
| 2079 | fprintf_filtered (file, "\t"); |
| 2080 | val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0, |
| 2081 | file, 0, 1, 0, Val_pretty_default); |
| 2082 | fprintf_filtered (file, "\n"); |
| 2083 | } |
| 2084 | |
| 2085 | static void |
| 2086 | sh_print_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 2087 | { |
| 2088 | if (regnum < 0 || regnum >= NUM_REGS + NUM_PSEUDO_REGS) |
| 2089 | internal_error (__FILE__, __LINE__, |
| 2090 | "Invalid register number %d\n", regnum); |
| 2091 | |
| 2092 | else if (regnum >= 0 && regnum < NUM_REGS) |
| 2093 | { |
| 2094 | if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == |
| 2095 | TYPE_CODE_FLT) |
| 2096 | sh_do_fp_register (gdbarch, file, regnum); /* FP regs */ |
| 2097 | else |
| 2098 | sh_do_register (gdbarch, file, regnum); /* All other regs */ |
| 2099 | } |
| 2100 | |
| 2101 | else if (regnum < NUM_REGS + NUM_PSEUDO_REGS) |
| 2102 | { |
| 2103 | sh_print_pseudo_register (gdbarch, file, regnum); |
| 2104 | } |
| 2105 | } |
| 2106 | |
| 2107 | static void |
| 2108 | sh_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 2109 | struct frame_info *frame, int regnum, int fpregs) |
| 2110 | { |
| 2111 | if (regnum != -1) /* do one specified register */ |
| 2112 | { |
| 2113 | if (*(REGISTER_NAME (regnum)) == '\0') |
| 2114 | error ("Not a valid register for the current processor type"); |
| 2115 | |
| 2116 | sh_print_register (gdbarch, file, regnum); |
| 2117 | } |
| 2118 | else |
| 2119 | /* do all (or most) registers */ |
| 2120 | { |
| 2121 | for (regnum = 0; regnum < NUM_REGS; ++regnum) |
| 2122 | { |
| 2123 | /* If the register name is empty, it is undefined for this |
| 2124 | processor, so don't display anything. */ |
| 2125 | if (REGISTER_NAME (regnum) == NULL |
| 2126 | || *(REGISTER_NAME (regnum)) == '\0') |
| 2127 | continue; |
| 2128 | |
| 2129 | if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == |
| 2130 | TYPE_CODE_FLT) |
| 2131 | { |
| 2132 | /* true for "INFO ALL-REGISTERS" command */ |
| 2133 | if (fpregs) |
| 2134 | sh_do_fp_register (gdbarch, file, regnum); /* FP regs */ |
| 2135 | } |
| 2136 | else |
| 2137 | sh_do_register (gdbarch, file, regnum); /* All other regs */ |
| 2138 | } |
| 2139 | |
| 2140 | if (regnum == PSEUDO_BANK_REGNUM |
| 2141 | && REGISTER_NAME (regnum) |
| 2142 | && *REGISTER_NAME (regnum)) |
| 2143 | sh_print_pseudo_register (gdbarch, file, regnum++); |
| 2144 | |
| 2145 | if (fpregs) |
| 2146 | while (regnum < NUM_REGS + NUM_PSEUDO_REGS) |
| 2147 | { |
| 2148 | sh_print_pseudo_register (gdbarch, file, regnum); |
| 2149 | regnum++; |
| 2150 | } |
| 2151 | } |
| 2152 | } |
| 2153 | |
| 2154 | /* Fetch (and possibly build) an appropriate link_map_offsets structure |
| 2155 | for native i386 linux targets using the struct offsets defined in |
| 2156 | link.h (but without actual reference to that file). |
| 2157 | |
| 2158 | This makes it possible to access i386-linux shared libraries from |
| 2159 | a gdb that was not built on an i386-linux host (for cross debugging). |
| 2160 | */ |
| 2161 | |
| 2162 | struct link_map_offsets * |
| 2163 | sh_linux_svr4_fetch_link_map_offsets (void) |
| 2164 | { |
| 2165 | static struct link_map_offsets lmo; |
| 2166 | static struct link_map_offsets *lmp = 0; |
| 2167 | |
| 2168 | if (lmp == 0) |
| 2169 | { |
| 2170 | lmp = &lmo; |
| 2171 | |
| 2172 | lmo.r_debug_size = 8; /* 20 not actual size but all we need */ |
| 2173 | |
| 2174 | lmo.r_map_offset = 4; |
| 2175 | lmo.r_map_size = 4; |
| 2176 | |
| 2177 | lmo.link_map_size = 20; /* 552 not actual size but all we need */ |
| 2178 | |
| 2179 | lmo.l_addr_offset = 0; |
| 2180 | lmo.l_addr_size = 4; |
| 2181 | |
| 2182 | lmo.l_name_offset = 4; |
| 2183 | lmo.l_name_size = 4; |
| 2184 | |
| 2185 | lmo.l_next_offset = 12; |
| 2186 | lmo.l_next_size = 4; |
| 2187 | |
| 2188 | lmo.l_prev_offset = 16; |
| 2189 | lmo.l_prev_size = 4; |
| 2190 | } |
| 2191 | |
| 2192 | return lmp; |
| 2193 | } |
| 2194 | |
| 2195 | static int |
| 2196 | sh_dsp_register_sim_regno (int nr) |
| 2197 | { |
| 2198 | if (legacy_register_sim_regno (nr) < 0) |
| 2199 | return legacy_register_sim_regno (nr); |
| 2200 | if (nr >= DSR_REGNUM && nr <= Y1_REGNUM) |
| 2201 | return nr - DSR_REGNUM + SIM_SH_DSR_REGNUM; |
| 2202 | if (nr == MOD_REGNUM) |
| 2203 | return SIM_SH_MOD_REGNUM; |
| 2204 | if (nr == RS_REGNUM) |
| 2205 | return SIM_SH_RS_REGNUM; |
| 2206 | if (nr == RE_REGNUM) |
| 2207 | return SIM_SH_RE_REGNUM; |
| 2208 | if (nr >= DSP_R0_BANK_REGNUM && nr <= DSP_R7_BANK_REGNUM) |
| 2209 | return nr - DSP_R0_BANK_REGNUM + SIM_SH_R0_BANK_REGNUM; |
| 2210 | return nr; |
| 2211 | } |
| 2212 | |
| 2213 | static int |
| 2214 | sh_sh2a_register_sim_regno (int nr) |
| 2215 | { |
| 2216 | switch (nr) |
| 2217 | { |
| 2218 | case TBR_REGNUM: |
| 2219 | return SIM_SH_TBR_REGNUM; |
| 2220 | case IBNR_REGNUM: |
| 2221 | return SIM_SH_IBNR_REGNUM; |
| 2222 | case IBCR_REGNUM: |
| 2223 | return SIM_SH_IBCR_REGNUM; |
| 2224 | case BANK_REGNUM: |
| 2225 | return SIM_SH_BANK_REGNUM; |
| 2226 | case MACLB_REGNUM: |
| 2227 | return SIM_SH_BANK_MACL_REGNUM; |
| 2228 | case GBRB_REGNUM: |
| 2229 | return SIM_SH_BANK_GBR_REGNUM; |
| 2230 | case PRB_REGNUM: |
| 2231 | return SIM_SH_BANK_PR_REGNUM; |
| 2232 | case IVNB_REGNUM: |
| 2233 | return SIM_SH_BANK_IVN_REGNUM; |
| 2234 | case MACHB_REGNUM: |
| 2235 | return SIM_SH_BANK_MACH_REGNUM; |
| 2236 | default: |
| 2237 | break; |
| 2238 | } |
| 2239 | return legacy_register_sim_regno (nr); |
| 2240 | } |
| 2241 | |
| 2242 | static struct sh_frame_cache * |
| 2243 | sh_alloc_frame_cache (void) |
| 2244 | { |
| 2245 | struct sh_frame_cache *cache; |
| 2246 | int i; |
| 2247 | |
| 2248 | cache = FRAME_OBSTACK_ZALLOC (struct sh_frame_cache); |
| 2249 | |
| 2250 | /* Base address. */ |
| 2251 | cache->base = 0; |
| 2252 | cache->saved_sp = 0; |
| 2253 | cache->sp_offset = 0; |
| 2254 | cache->pc = 0; |
| 2255 | |
| 2256 | /* Frameless until proven otherwise. */ |
| 2257 | cache->uses_fp = 0; |
| 2258 | |
| 2259 | /* Saved registers. We initialize these to -1 since zero is a valid |
| 2260 | offset (that's where fp is supposed to be stored). */ |
| 2261 | for (i = 0; i < SH_NUM_REGS; i++) |
| 2262 | { |
| 2263 | cache->saved_regs[i] = -1; |
| 2264 | } |
| 2265 | |
| 2266 | return cache; |
| 2267 | } |
| 2268 | |
| 2269 | static struct sh_frame_cache * |
| 2270 | sh_frame_cache (struct frame_info *next_frame, void **this_cache) |
| 2271 | { |
| 2272 | struct sh_frame_cache *cache; |
| 2273 | CORE_ADDR current_pc; |
| 2274 | int i; |
| 2275 | |
| 2276 | if (*this_cache) |
| 2277 | return *this_cache; |
| 2278 | |
| 2279 | cache = sh_alloc_frame_cache (); |
| 2280 | *this_cache = cache; |
| 2281 | |
| 2282 | /* In principle, for normal frames, fp holds the frame pointer, |
| 2283 | which holds the base address for the current stack frame. |
| 2284 | However, for functions that don't need it, the frame pointer is |
| 2285 | optional. For these "frameless" functions the frame pointer is |
| 2286 | actually the frame pointer of the calling frame. */ |
| 2287 | cache->base = frame_unwind_register_unsigned (next_frame, FP_REGNUM); |
| 2288 | if (cache->base == 0) |
| 2289 | return cache; |
| 2290 | |
| 2291 | cache->pc = frame_func_unwind (next_frame); |
| 2292 | current_pc = frame_pc_unwind (next_frame); |
| 2293 | if (cache->pc != 0) |
| 2294 | sh_analyze_prologue (cache->pc, current_pc, cache); |
| 2295 | |
| 2296 | if (!cache->uses_fp) |
| 2297 | { |
| 2298 | /* We didn't find a valid frame, which means that CACHE->base |
| 2299 | currently holds the frame pointer for our calling frame. If |
| 2300 | we're at the start of a function, or somewhere half-way its |
| 2301 | prologue, the function's frame probably hasn't been fully |
| 2302 | setup yet. Try to reconstruct the base address for the stack |
| 2303 | frame by looking at the stack pointer. For truly "frameless" |
| 2304 | functions this might work too. */ |
| 2305 | cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM); |
| 2306 | } |
| 2307 | |
| 2308 | /* Now that we have the base address for the stack frame we can |
| 2309 | calculate the value of sp in the calling frame. */ |
| 2310 | cache->saved_sp = cache->base + cache->sp_offset; |
| 2311 | |
| 2312 | /* Adjust all the saved registers such that they contain addresses |
| 2313 | instead of offsets. */ |
| 2314 | for (i = 0; i < SH_NUM_REGS; i++) |
| 2315 | if (cache->saved_regs[i] != -1) |
| 2316 | cache->saved_regs[i] = cache->saved_sp - cache->saved_regs[i] - 4; |
| 2317 | |
| 2318 | return cache; |
| 2319 | } |
| 2320 | |
| 2321 | static void |
| 2322 | sh_frame_prev_register (struct frame_info *next_frame, void **this_cache, |
| 2323 | int regnum, int *optimizedp, |
| 2324 | enum lval_type *lvalp, CORE_ADDR *addrp, |
| 2325 | int *realnump, void *valuep) |
| 2326 | { |
| 2327 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 2328 | |
| 2329 | gdb_assert (regnum >= 0); |
| 2330 | |
| 2331 | if (regnum == SP_REGNUM && cache->saved_sp) |
| 2332 | { |
| 2333 | *optimizedp = 0; |
| 2334 | *lvalp = not_lval; |
| 2335 | *addrp = 0; |
| 2336 | *realnump = -1; |
| 2337 | if (valuep) |
| 2338 | { |
| 2339 | /* Store the value. */ |
| 2340 | store_unsigned_integer (valuep, 4, cache->saved_sp); |
| 2341 | } |
| 2342 | return; |
| 2343 | } |
| 2344 | |
| 2345 | /* The PC of the previous frame is stored in the PR register of |
| 2346 | the current frame. Frob regnum so that we pull the value from |
| 2347 | the correct place. */ |
| 2348 | if (regnum == PC_REGNUM) |
| 2349 | regnum = PR_REGNUM; |
| 2350 | |
| 2351 | if (regnum < SH_NUM_REGS && cache->saved_regs[regnum] != -1) |
| 2352 | { |
| 2353 | *optimizedp = 0; |
| 2354 | *lvalp = lval_memory; |
| 2355 | *addrp = cache->saved_regs[regnum]; |
| 2356 | *realnump = -1; |
| 2357 | if (valuep) |
| 2358 | { |
| 2359 | /* Read the value in from memory. */ |
| 2360 | read_memory (*addrp, valuep, |
| 2361 | register_size (current_gdbarch, regnum)); |
| 2362 | } |
| 2363 | return; |
| 2364 | } |
| 2365 | |
| 2366 | *optimizedp = 0; |
| 2367 | *lvalp = lval_register; |
| 2368 | *addrp = 0; |
| 2369 | *realnump = regnum; |
| 2370 | if (valuep) |
| 2371 | frame_unwind_register (next_frame, (*realnump), valuep); |
| 2372 | } |
| 2373 | |
| 2374 | static void |
| 2375 | sh_frame_this_id (struct frame_info *next_frame, void **this_cache, |
| 2376 | struct frame_id *this_id) |
| 2377 | { |
| 2378 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 2379 | |
| 2380 | /* This marks the outermost frame. */ |
| 2381 | if (cache->base == 0) |
| 2382 | return; |
| 2383 | |
| 2384 | *this_id = frame_id_build (cache->saved_sp, cache->pc); |
| 2385 | } |
| 2386 | |
| 2387 | static const struct frame_unwind sh_frame_unwind = { |
| 2388 | NORMAL_FRAME, |
| 2389 | sh_frame_this_id, |
| 2390 | sh_frame_prev_register |
| 2391 | }; |
| 2392 | |
| 2393 | static const struct frame_unwind * |
| 2394 | sh_frame_sniffer (struct frame_info *next_frame) |
| 2395 | { |
| 2396 | return &sh_frame_unwind; |
| 2397 | } |
| 2398 | |
| 2399 | static CORE_ADDR |
| 2400 | sh_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 2401 | { |
| 2402 | return frame_unwind_register_unsigned (next_frame, SP_REGNUM); |
| 2403 | } |
| 2404 | |
| 2405 | static CORE_ADDR |
| 2406 | sh_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 2407 | { |
| 2408 | return frame_unwind_register_unsigned (next_frame, PC_REGNUM); |
| 2409 | } |
| 2410 | |
| 2411 | static struct frame_id |
| 2412 | sh_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 2413 | { |
| 2414 | return frame_id_build (sh_unwind_sp (gdbarch, next_frame), |
| 2415 | frame_pc_unwind (next_frame)); |
| 2416 | } |
| 2417 | |
| 2418 | static CORE_ADDR |
| 2419 | sh_frame_base_address (struct frame_info *next_frame, void **this_cache) |
| 2420 | { |
| 2421 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 2422 | |
| 2423 | return cache->base; |
| 2424 | } |
| 2425 | |
| 2426 | static const struct frame_base sh_frame_base = { |
| 2427 | &sh_frame_unwind, |
| 2428 | sh_frame_base_address, |
| 2429 | sh_frame_base_address, |
| 2430 | sh_frame_base_address |
| 2431 | }; |
| 2432 | |
| 2433 | /* The epilogue is defined here as the area at the end of a function, |
| 2434 | either on the `ret' instruction itself or after an instruction which |
| 2435 | destroys the function's stack frame. */ |
| 2436 | static int |
| 2437 | sh_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 2438 | { |
| 2439 | CORE_ADDR func_addr = 0, func_end = 0; |
| 2440 | |
| 2441 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 2442 | { |
| 2443 | ULONGEST inst; |
| 2444 | /* The sh epilogue is max. 14 bytes long. Give another 14 bytes |
| 2445 | for a nop and some fixed data (e.g. big offsets) which are |
| 2446 | unfortunately also treated as part of the function (which |
| 2447 | means, they are below func_end. */ |
| 2448 | CORE_ADDR addr = func_end - 28; |
| 2449 | if (addr < func_addr + 4) |
| 2450 | addr = func_addr + 4; |
| 2451 | if (pc < addr) |
| 2452 | return 0; |
| 2453 | |
| 2454 | /* First search forward until hitting an rts. */ |
| 2455 | while (addr < func_end |
| 2456 | && !IS_RTS (read_memory_unsigned_integer (addr, 2))) |
| 2457 | addr += 2; |
| 2458 | if (addr >= func_end) |
| 2459 | return 0; |
| 2460 | |
| 2461 | /* At this point we should find a mov.l @r15+,r14 instruction, |
| 2462 | either before or after the rts. If not, then the function has |
| 2463 | probably no "normal" epilogue and we bail out here. */ |
| 2464 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2465 | if (IS_RESTORE_FP (read_memory_unsigned_integer (addr - 2, 2))) |
| 2466 | addr -= 2; |
| 2467 | else if (!IS_RESTORE_FP (read_memory_unsigned_integer (addr + 2, 2))) |
| 2468 | return 0; |
| 2469 | |
| 2470 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2471 | |
| 2472 | /* Step over possible lds.l @r15+,macl. */ |
| 2473 | if (IS_MACL_LDS (inst)) |
| 2474 | { |
| 2475 | addr -= 2; |
| 2476 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2477 | } |
| 2478 | |
| 2479 | /* Step over possible lds.l @r15+,pr. */ |
| 2480 | if (IS_LDS (inst)) |
| 2481 | { |
| 2482 | addr -= 2; |
| 2483 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2484 | } |
| 2485 | |
| 2486 | /* Step over possible mov r14,r15. */ |
| 2487 | if (IS_MOV_FP_SP (inst)) |
| 2488 | { |
| 2489 | addr -= 2; |
| 2490 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2491 | } |
| 2492 | |
| 2493 | /* Now check for FP adjustments, using add #imm,r14 or add rX, r14 |
| 2494 | instructions. */ |
| 2495 | while (addr > func_addr + 4 |
| 2496 | && (IS_ADD_REG_TO_FP (inst) || IS_ADD_IMM_FP (inst))) |
| 2497 | { |
| 2498 | addr -= 2; |
| 2499 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 2500 | } |
| 2501 | |
| 2502 | /* On SH2a check if the previous instruction was perhaps a MOVI20. |
| 2503 | That's allowed for the epilogue. */ |
| 2504 | if ((gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a |
| 2505 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a_nofpu) |
| 2506 | && addr > func_addr + 6 |
| 2507 | && IS_MOVI20 (read_memory_unsigned_integer (addr - 4, 2))) |
| 2508 | addr -= 4; |
| 2509 | |
| 2510 | if (pc >= addr) |
| 2511 | return 1; |
| 2512 | } |
| 2513 | return 0; |
| 2514 | } |
| 2515 | |
| 2516 | static gdbarch_init_ftype sh_gdbarch_init; |
| 2517 | |
| 2518 | static struct gdbarch * |
| 2519 | sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 2520 | { |
| 2521 | struct gdbarch *gdbarch; |
| 2522 | |
| 2523 | sh_show_regs = sh_generic_show_regs; |
| 2524 | switch (info.bfd_arch_info->mach) |
| 2525 | { |
| 2526 | case bfd_mach_sh2e: |
| 2527 | sh_show_regs = sh2e_show_regs; |
| 2528 | break; |
| 2529 | case bfd_mach_sh2a: |
| 2530 | sh_show_regs = sh2a_show_regs; |
| 2531 | break; |
| 2532 | case bfd_mach_sh2a_nofpu: |
| 2533 | sh_show_regs = sh2a_nofpu_show_regs; |
| 2534 | break; |
| 2535 | case bfd_mach_sh_dsp: |
| 2536 | sh_show_regs = sh_dsp_show_regs; |
| 2537 | break; |
| 2538 | |
| 2539 | case bfd_mach_sh3: |
| 2540 | sh_show_regs = sh3_show_regs; |
| 2541 | break; |
| 2542 | |
| 2543 | case bfd_mach_sh3e: |
| 2544 | sh_show_regs = sh3e_show_regs; |
| 2545 | break; |
| 2546 | |
| 2547 | case bfd_mach_sh3_dsp: |
| 2548 | case bfd_mach_sh4al_dsp: |
| 2549 | sh_show_regs = sh3_dsp_show_regs; |
| 2550 | break; |
| 2551 | |
| 2552 | case bfd_mach_sh4: |
| 2553 | case bfd_mach_sh4a: |
| 2554 | sh_show_regs = sh4_show_regs; |
| 2555 | break; |
| 2556 | |
| 2557 | case bfd_mach_sh4_nofpu: |
| 2558 | case bfd_mach_sh4a_nofpu: |
| 2559 | sh_show_regs = sh4_nofpu_show_regs; |
| 2560 | break; |
| 2561 | |
| 2562 | #if 0 |
| 2563 | case bfd_mach_sh5: |
| 2564 | sh_show_regs = sh64_show_regs; |
| 2565 | /* SH5 is handled entirely in sh64-tdep.c */ |
| 2566 | return sh64_gdbarch_init (info, arches); |
| 2567 | #endif |
| 2568 | } |
| 2569 | |
| 2570 | /* If there is already a candidate, use it. */ |
| 2571 | arches = gdbarch_list_lookup_by_info (arches, &info); |
| 2572 | if (arches != NULL) |
| 2573 | return arches->gdbarch; |
| 2574 | |
| 2575 | /* None found, create a new architecture from the information |
| 2576 | provided. */ |
| 2577 | gdbarch = gdbarch_alloc (&info, NULL); |
| 2578 | |
| 2579 | set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
| 2580 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2581 | set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2582 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2583 | set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2584 | set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2585 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2586 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2587 | |
| 2588 | set_gdbarch_num_regs (gdbarch, SH_NUM_REGS); |
| 2589 | set_gdbarch_sp_regnum (gdbarch, 15); |
| 2590 | set_gdbarch_pc_regnum (gdbarch, 16); |
| 2591 | set_gdbarch_fp0_regnum (gdbarch, -1); |
| 2592 | set_gdbarch_num_pseudo_regs (gdbarch, 0); |
| 2593 | |
| 2594 | set_gdbarch_register_type (gdbarch, sh_default_register_type); |
| 2595 | |
| 2596 | set_gdbarch_print_registers_info (gdbarch, sh_print_registers_info); |
| 2597 | |
| 2598 | set_gdbarch_breakpoint_from_pc (gdbarch, sh_breakpoint_from_pc); |
| 2599 | |
| 2600 | set_gdbarch_print_insn (gdbarch, gdb_print_insn_sh); |
| 2601 | set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno); |
| 2602 | |
| 2603 | set_gdbarch_write_pc (gdbarch, generic_target_write_pc); |
| 2604 | |
| 2605 | set_gdbarch_return_value (gdbarch, sh_return_value_nofpu); |
| 2606 | set_gdbarch_deprecated_extract_struct_value_address (gdbarch, |
| 2607 | sh_extract_struct_value_address); |
| 2608 | |
| 2609 | set_gdbarch_skip_prologue (gdbarch, sh_skip_prologue); |
| 2610 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 2611 | |
| 2612 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_nofpu); |
| 2613 | |
| 2614 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
| 2615 | |
| 2616 | set_gdbarch_frame_align (gdbarch, sh_frame_align); |
| 2617 | set_gdbarch_unwind_sp (gdbarch, sh_unwind_sp); |
| 2618 | set_gdbarch_unwind_pc (gdbarch, sh_unwind_pc); |
| 2619 | set_gdbarch_unwind_dummy_id (gdbarch, sh_unwind_dummy_id); |
| 2620 | frame_base_set_default (gdbarch, &sh_frame_base); |
| 2621 | |
| 2622 | set_gdbarch_in_function_epilogue_p (gdbarch, sh_in_function_epilogue_p); |
| 2623 | |
| 2624 | switch (info.bfd_arch_info->mach) |
| 2625 | { |
| 2626 | case bfd_mach_sh: |
| 2627 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2628 | break; |
| 2629 | |
| 2630 | case bfd_mach_sh2: |
| 2631 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2632 | break; |
| 2633 | |
| 2634 | case bfd_mach_sh2e: |
| 2635 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2636 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2637 | |
| 2638 | set_gdbarch_register_name (gdbarch, sh_sh2e_register_name); |
| 2639 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2640 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2641 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2642 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2643 | break; |
| 2644 | |
| 2645 | case bfd_mach_sh2a: |
| 2646 | set_gdbarch_register_name (gdbarch, sh_sh2a_register_name); |
| 2647 | set_gdbarch_register_type (gdbarch, sh_sh2a_register_type); |
| 2648 | set_gdbarch_register_sim_regno (gdbarch, sh_sh2a_register_sim_regno); |
| 2649 | |
| 2650 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2651 | set_gdbarch_num_pseudo_regs (gdbarch, 9); |
| 2652 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2653 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2654 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2655 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2656 | break; |
| 2657 | |
| 2658 | case bfd_mach_sh2a_nofpu: |
| 2659 | set_gdbarch_register_name (gdbarch, sh_sh2a_nofpu_register_name); |
| 2660 | set_gdbarch_register_sim_regno (gdbarch, sh_sh2a_register_sim_regno); |
| 2661 | |
| 2662 | set_gdbarch_num_pseudo_regs (gdbarch, 1); |
| 2663 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2664 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2665 | break; |
| 2666 | |
| 2667 | case bfd_mach_sh_dsp: |
| 2668 | set_gdbarch_register_name (gdbarch, sh_sh_dsp_register_name); |
| 2669 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2670 | break; |
| 2671 | |
| 2672 | case bfd_mach_sh3: |
| 2673 | set_gdbarch_register_name (gdbarch, sh_sh3_register_name); |
| 2674 | break; |
| 2675 | |
| 2676 | case bfd_mach_sh3e: |
| 2677 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2678 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2679 | |
| 2680 | set_gdbarch_register_name (gdbarch, sh_sh3e_register_name); |
| 2681 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2682 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2683 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2684 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2685 | break; |
| 2686 | |
| 2687 | case bfd_mach_sh3_dsp: |
| 2688 | set_gdbarch_register_name (gdbarch, sh_sh3_dsp_register_name); |
| 2689 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2690 | break; |
| 2691 | |
| 2692 | case bfd_mach_sh4: |
| 2693 | case bfd_mach_sh4a: |
| 2694 | set_gdbarch_register_name (gdbarch, sh_sh4_register_name); |
| 2695 | set_gdbarch_register_type (gdbarch, sh_sh4_register_type); |
| 2696 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2697 | set_gdbarch_num_pseudo_regs (gdbarch, 13); |
| 2698 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2699 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2700 | set_gdbarch_return_value (gdbarch, sh_return_value_fpu); |
| 2701 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2702 | break; |
| 2703 | |
| 2704 | case bfd_mach_sh4_nofpu: |
| 2705 | case bfd_mach_sh4a_nofpu: |
| 2706 | set_gdbarch_register_name (gdbarch, sh_sh4_nofpu_register_name); |
| 2707 | break; |
| 2708 | |
| 2709 | case bfd_mach_sh4al_dsp: |
| 2710 | set_gdbarch_register_name (gdbarch, sh_sh4al_dsp_register_name); |
| 2711 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2712 | break; |
| 2713 | |
| 2714 | default: |
| 2715 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2716 | break; |
| 2717 | } |
| 2718 | |
| 2719 | /* Hook in ABI-specific overrides, if they have been registered. */ |
| 2720 | gdbarch_init_osabi (info, gdbarch); |
| 2721 | |
| 2722 | frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); |
| 2723 | frame_unwind_append_sniffer (gdbarch, sh_frame_sniffer); |
| 2724 | |
| 2725 | return gdbarch; |
| 2726 | } |
| 2727 | |
| 2728 | extern initialize_file_ftype _initialize_sh_tdep; /* -Wmissing-prototypes */ |
| 2729 | |
| 2730 | void |
| 2731 | _initialize_sh_tdep (void) |
| 2732 | { |
| 2733 | struct cmd_list_element *c; |
| 2734 | |
| 2735 | gdbarch_register (bfd_arch_sh, sh_gdbarch_init, NULL); |
| 2736 | |
| 2737 | add_com ("regs", class_vars, sh_show_regs_command, "Print all registers"); |
| 2738 | } |