| 1 | /* Target-dependent code for Hitachi Super-H, for GDB. |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| 3 | 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 "symfile.h" |
| 34 | #include "gdbtypes.h" |
| 35 | #include "gdbcmd.h" |
| 36 | #include "gdbcore.h" |
| 37 | #include "value.h" |
| 38 | #include "dis-asm.h" |
| 39 | #include "inferior.h" |
| 40 | #include "gdb_string.h" |
| 41 | #include "gdb_assert.h" |
| 42 | #include "arch-utils.h" |
| 43 | #include "floatformat.h" |
| 44 | #include "regcache.h" |
| 45 | #include "doublest.h" |
| 46 | #include "osabi.h" |
| 47 | |
| 48 | #include "sh-tdep.h" |
| 49 | |
| 50 | #include "elf-bfd.h" |
| 51 | #include "solib-svr4.h" |
| 52 | |
| 53 | /* sh flags */ |
| 54 | #include "elf/sh.h" |
| 55 | /* registers numbers shared with the simulator */ |
| 56 | #include "gdb/sim-sh.h" |
| 57 | |
| 58 | static void (*sh_show_regs) (void); |
| 59 | |
| 60 | #define SH_NUM_REGS 59 |
| 61 | |
| 62 | struct sh_frame_cache |
| 63 | { |
| 64 | /* Base address. */ |
| 65 | CORE_ADDR base; |
| 66 | LONGEST sp_offset; |
| 67 | CORE_ADDR pc; |
| 68 | |
| 69 | /* Flag showing that a frame has been created in the prologue code. */ |
| 70 | int uses_fp; |
| 71 | |
| 72 | /* Saved registers. */ |
| 73 | CORE_ADDR saved_regs[SH_NUM_REGS]; |
| 74 | CORE_ADDR saved_sp; |
| 75 | }; |
| 76 | |
| 77 | static const char * |
| 78 | sh_generic_register_name (int reg_nr) |
| 79 | { |
| 80 | static char *register_names[] = { |
| 81 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 82 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 83 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 84 | "fpul", "fpscr", |
| 85 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 86 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 87 | "ssr", "spc", |
| 88 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 89 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 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_sh_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 | "", "", |
| 109 | "", "", "", "", "", "", "", "", |
| 110 | "", "", "", "", "", "", "", "", |
| 111 | }; |
| 112 | if (reg_nr < 0) |
| 113 | return NULL; |
| 114 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 115 | return NULL; |
| 116 | return register_names[reg_nr]; |
| 117 | } |
| 118 | |
| 119 | static const char * |
| 120 | sh_sh3_register_name (int reg_nr) |
| 121 | { |
| 122 | static char *register_names[] = { |
| 123 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 124 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 125 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 126 | "", "", |
| 127 | "", "", "", "", "", "", "", "", |
| 128 | "", "", "", "", "", "", "", "", |
| 129 | "ssr", "spc", |
| 130 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 131 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1" |
| 132 | }; |
| 133 | if (reg_nr < 0) |
| 134 | return NULL; |
| 135 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 136 | return NULL; |
| 137 | return register_names[reg_nr]; |
| 138 | } |
| 139 | |
| 140 | static const char * |
| 141 | sh_sh3e_register_name (int reg_nr) |
| 142 | { |
| 143 | static char *register_names[] = { |
| 144 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 145 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 146 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 147 | "fpul", "fpscr", |
| 148 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 149 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 150 | "ssr", "spc", |
| 151 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 152 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 153 | }; |
| 154 | if (reg_nr < 0) |
| 155 | return NULL; |
| 156 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 157 | return NULL; |
| 158 | return register_names[reg_nr]; |
| 159 | } |
| 160 | |
| 161 | static const char * |
| 162 | sh_sh2e_register_name (int reg_nr) |
| 163 | { |
| 164 | static char *register_names[] = { |
| 165 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 166 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 167 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 168 | "fpul", "fpscr", |
| 169 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 170 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 171 | "", "", |
| 172 | "", "", "", "", "", "", "", "", |
| 173 | "", "", "", "", "", "", "", "", |
| 174 | }; |
| 175 | if (reg_nr < 0) |
| 176 | return NULL; |
| 177 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 178 | return NULL; |
| 179 | return register_names[reg_nr]; |
| 180 | } |
| 181 | |
| 182 | static const char * |
| 183 | sh_sh_dsp_register_name (int reg_nr) |
| 184 | { |
| 185 | static char *register_names[] = { |
| 186 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 187 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 188 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 189 | "", "dsr", |
| 190 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 191 | "y0", "y1", "", "", "", "", "", "mod", |
| 192 | "", "", |
| 193 | "rs", "re", "", "", "", "", "", "", |
| 194 | "", "", "", "", "", "", "", "", |
| 195 | }; |
| 196 | if (reg_nr < 0) |
| 197 | return NULL; |
| 198 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 199 | return NULL; |
| 200 | return register_names[reg_nr]; |
| 201 | } |
| 202 | |
| 203 | static const char * |
| 204 | sh_sh3_dsp_register_name (int reg_nr) |
| 205 | { |
| 206 | static char *register_names[] = { |
| 207 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 208 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 209 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 210 | "", "dsr", |
| 211 | "a0g", "a0", "a1g", "a1", "m0", "m1", "x0", "x1", |
| 212 | "y0", "y1", "", "", "", "", "", "mod", |
| 213 | "ssr", "spc", |
| 214 | "rs", "re", "", "", "", "", "", "", |
| 215 | "r0b", "r1b", "r2b", "r3b", "r4b", "r5b", "r6b", "r7b" |
| 216 | "", "", "", "", "", "", "", "", |
| 217 | }; |
| 218 | if (reg_nr < 0) |
| 219 | return NULL; |
| 220 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 221 | return NULL; |
| 222 | return register_names[reg_nr]; |
| 223 | } |
| 224 | |
| 225 | static const char * |
| 226 | sh_sh4_register_name (int reg_nr) |
| 227 | { |
| 228 | static char *register_names[] = { |
| 229 | /* general registers 0-15 */ |
| 230 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
| 231 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
| 232 | /* 16 - 22 */ |
| 233 | "pc", "pr", "gbr", "vbr", "mach", "macl", "sr", |
| 234 | /* 23, 24 */ |
| 235 | "fpul", "fpscr", |
| 236 | /* floating point registers 25 - 40 */ |
| 237 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", |
| 238 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", |
| 239 | /* 41, 42 */ |
| 240 | "ssr", "spc", |
| 241 | /* bank 0 43 - 50 */ |
| 242 | "r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", |
| 243 | /* bank 1 51 - 58 */ |
| 244 | "r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", |
| 245 | /* double precision (pseudo) 59 - 66 */ |
| 246 | "dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14", |
| 247 | /* vectors (pseudo) 67 - 70 */ |
| 248 | "fv0", "fv4", "fv8", "fv12", |
| 249 | /* FIXME: missing XF 71 - 86 */ |
| 250 | /* FIXME: missing XD 87 - 94 */ |
| 251 | }; |
| 252 | if (reg_nr < 0) |
| 253 | return NULL; |
| 254 | if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) |
| 255 | return NULL; |
| 256 | return register_names[reg_nr]; |
| 257 | } |
| 258 | |
| 259 | static const unsigned char * |
| 260 | sh_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
| 261 | { |
| 262 | /* 0xc3c3 is trapa #c3, and it works in big and little endian modes */ |
| 263 | static unsigned char breakpoint[] = { 0xc3, 0xc3 }; |
| 264 | |
| 265 | *lenptr = sizeof (breakpoint); |
| 266 | return breakpoint; |
| 267 | } |
| 268 | |
| 269 | static CORE_ADDR |
| 270 | sh_push_dummy_code (struct gdbarch *gdbarch, |
| 271 | CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc, |
| 272 | struct value **args, int nargs, |
| 273 | struct type *value_type, |
| 274 | CORE_ADDR *real_pc, CORE_ADDR *bp_addr) |
| 275 | { |
| 276 | /* Allocate space sufficient for a breakpoint. */ |
| 277 | sp = (sp - 2) & ~1; |
| 278 | /* Store the address of that breakpoint */ |
| 279 | *bp_addr = sp; |
| 280 | /* sh always starts the call at the callee's entry point. */ |
| 281 | *real_pc = funaddr; |
| 282 | return sp; |
| 283 | } |
| 284 | |
| 285 | /* Prologue looks like |
| 286 | mov.l r14,@-r15 |
| 287 | sts.l pr,@-r15 |
| 288 | mov.l <regs>,@-r15 |
| 289 | sub <room_for_loca_vars>,r15 |
| 290 | mov r15,r14 |
| 291 | |
| 292 | Actually it can be more complicated than this but that's it, basically. |
| 293 | */ |
| 294 | |
| 295 | #define GET_SOURCE_REG(x) (((x) >> 4) & 0xf) |
| 296 | #define GET_TARGET_REG(x) (((x) >> 8) & 0xf) |
| 297 | |
| 298 | /* STS.L PR,@-r15 0100111100100010 |
| 299 | r15-4-->r15, PR-->(r15) */ |
| 300 | #define IS_STS(x) ((x) == 0x4f22) |
| 301 | |
| 302 | /* MOV.L Rm,@-r15 00101111mmmm0110 |
| 303 | r15-4-->r15, Rm-->(R15) */ |
| 304 | #define IS_PUSH(x) (((x) & 0xff0f) == 0x2f06) |
| 305 | |
| 306 | /* MOV r15,r14 0110111011110011 |
| 307 | r15-->r14 */ |
| 308 | #define IS_MOV_SP_FP(x) ((x) == 0x6ef3) |
| 309 | |
| 310 | /* ADD #imm,r15 01111111iiiiiiii |
| 311 | r15+imm-->r15 */ |
| 312 | #define IS_ADD_IMM_SP(x) (((x) & 0xff00) == 0x7f00) |
| 313 | |
| 314 | #define IS_MOV_R3(x) (((x) & 0xff00) == 0x1a00) |
| 315 | #define IS_SHLL_R3(x) ((x) == 0x4300) |
| 316 | |
| 317 | /* ADD r3,r15 0011111100111100 |
| 318 | r15+r3-->r15 */ |
| 319 | #define IS_ADD_R3SP(x) ((x) == 0x3f3c) |
| 320 | |
| 321 | /* FMOV.S FRm,@-Rn Rn-4-->Rn, FRm-->(Rn) 1111nnnnmmmm1011 |
| 322 | FMOV DRm,@-Rn Rn-8-->Rn, DRm-->(Rn) 1111nnnnmmm01011 |
| 323 | FMOV XDm,@-Rn Rn-8-->Rn, XDm-->(Rn) 1111nnnnmmm11011 */ |
| 324 | /* CV, 2003-08-28: Only suitable with Rn == SP, therefore name changed to |
| 325 | make this entirely clear. */ |
| 326 | /* #define IS_FMOV(x) (((x) & 0xf00f) == 0xf00b) */ |
| 327 | #define IS_FPUSH(x) (((x) & 0xff0f) == 0xff0b) |
| 328 | |
| 329 | /* MOV Rm,Rn Rm-->Rn 0110nnnnmmmm0011 4 <= m <= 7 */ |
| 330 | #define IS_MOV_ARG_TO_REG(x) \ |
| 331 | (((x) & 0xf00f) == 0x6003 && \ |
| 332 | ((x) & 0x00f0) >= 0x0040 && \ |
| 333 | ((x) & 0x00f0) <= 0x0070) |
| 334 | /* MOV.L Rm,@Rn 0010nnnnmmmm0010 n = 14, 4 <= m <= 7 */ |
| 335 | #define IS_MOV_ARG_TO_IND_R14(x) \ |
| 336 | (((x) & 0xff0f) == 0x2e02 && \ |
| 337 | ((x) & 0x00f0) >= 0x0040 && \ |
| 338 | ((x) & 0x00f0) <= 0x0070) |
| 339 | /* MOV.L Rm,@(disp*4,Rn) 00011110mmmmdddd n = 14, 4 <= m <= 7 */ |
| 340 | #define IS_MOV_ARG_TO_IND_R14_WITH_DISP(x) \ |
| 341 | (((x) & 0xff00) == 0x1e00 && \ |
| 342 | ((x) & 0x00f0) >= 0x0040 && \ |
| 343 | ((x) & 0x00f0) <= 0x0070) |
| 344 | |
| 345 | /* MOV.W @(disp*2,PC),Rn 1001nnnndddddddd */ |
| 346 | #define IS_MOVW_PCREL_TO_REG(x) (((x) & 0xf000) == 0x9000) |
| 347 | /* MOV.L @(disp*4,PC),Rn 1101nnnndddddddd */ |
| 348 | #define IS_MOVL_PCREL_TO_REG(x) (((x) & 0xf000) == 0xd000) |
| 349 | /* SUB Rn,R15 00111111nnnn1000 */ |
| 350 | #define IS_SUB_REG_FROM_SP(x) (((x) & 0xff0f) == 0x3f08) |
| 351 | |
| 352 | #define FPSCR_SZ (1 << 20) |
| 353 | |
| 354 | /* The following instructions are used for epilogue testing. */ |
| 355 | #define IS_RESTORE_FP(x) ((x) == 0x6ef6) |
| 356 | #define IS_RTS(x) ((x) == 0x000b) |
| 357 | #define IS_LDS(x) ((x) == 0x4f26) |
| 358 | #define IS_MOV_FP_SP(x) ((x) == 0x6fe3) |
| 359 | #define IS_ADD_REG_TO_FP(x) (((x) & 0xff0f) == 0x3e0c) |
| 360 | #define IS_ADD_IMM_FP(x) (((x) & 0xff00) == 0x7e00) |
| 361 | |
| 362 | /* Disassemble an instruction. */ |
| 363 | static int |
| 364 | gdb_print_insn_sh (bfd_vma memaddr, disassemble_info * info) |
| 365 | { |
| 366 | info->endian = TARGET_BYTE_ORDER; |
| 367 | return print_insn_sh (memaddr, info); |
| 368 | } |
| 369 | |
| 370 | static CORE_ADDR |
| 371 | sh_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, |
| 372 | struct sh_frame_cache *cache) |
| 373 | { |
| 374 | ULONGEST inst; |
| 375 | CORE_ADDR opc; |
| 376 | int offset; |
| 377 | int sav_offset = 0; |
| 378 | int r3_val = 0; |
| 379 | int reg, sav_reg = -1; |
| 380 | |
| 381 | if (pc >= current_pc) |
| 382 | return current_pc; |
| 383 | |
| 384 | cache->uses_fp = 0; |
| 385 | for (opc = pc + (2 * 28); pc < opc; pc += 2) |
| 386 | { |
| 387 | inst = read_memory_unsigned_integer (pc, 2); |
| 388 | /* See where the registers will be saved to */ |
| 389 | if (IS_PUSH (inst)) |
| 390 | { |
| 391 | cache->saved_regs[GET_SOURCE_REG (inst)] = cache->sp_offset; |
| 392 | cache->sp_offset += 4; |
| 393 | } |
| 394 | else if (IS_STS (inst)) |
| 395 | { |
| 396 | cache->saved_regs[PR_REGNUM] = cache->sp_offset; |
| 397 | cache->sp_offset += 4; |
| 398 | } |
| 399 | else if (IS_MOV_R3 (inst)) |
| 400 | { |
| 401 | r3_val = ((inst & 0xff) ^ 0x80) - 0x80; |
| 402 | } |
| 403 | else if (IS_SHLL_R3 (inst)) |
| 404 | { |
| 405 | r3_val <<= 1; |
| 406 | } |
| 407 | else if (IS_ADD_R3SP (inst)) |
| 408 | { |
| 409 | cache->sp_offset += -r3_val; |
| 410 | } |
| 411 | else if (IS_ADD_IMM_SP (inst)) |
| 412 | { |
| 413 | offset = ((inst & 0xff) ^ 0x80) - 0x80; |
| 414 | cache->sp_offset -= offset; |
| 415 | } |
| 416 | else if (IS_MOVW_PCREL_TO_REG (inst)) |
| 417 | { |
| 418 | if (sav_reg < 0) |
| 419 | { |
| 420 | reg = GET_TARGET_REG (inst); |
| 421 | if (reg < 14) |
| 422 | { |
| 423 | sav_reg = reg; |
| 424 | offset = (((inst & 0xff) ^ 0x80) - 0x80) << 1; |
| 425 | sav_offset = |
| 426 | read_memory_integer (((pc + 4) & ~3) + offset, 2); |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | else if (IS_MOVL_PCREL_TO_REG (inst)) |
| 431 | { |
| 432 | if (sav_reg < 0) |
| 433 | { |
| 434 | reg = (inst & 0x0f00) >> 8; |
| 435 | if (reg < 14) |
| 436 | { |
| 437 | sav_reg = reg; |
| 438 | offset = (((inst & 0xff) ^ 0x80) - 0x80) << 1; |
| 439 | sav_offset = |
| 440 | read_memory_integer (((pc + 4) & ~3) + offset, 4); |
| 441 | } |
| 442 | } |
| 443 | } |
| 444 | else if (IS_SUB_REG_FROM_SP (inst)) |
| 445 | { |
| 446 | reg = GET_SOURCE_REG (inst); |
| 447 | if (sav_reg > 0 && reg == sav_reg) |
| 448 | { |
| 449 | sav_reg = -1; |
| 450 | } |
| 451 | cache->sp_offset += sav_offset; |
| 452 | } |
| 453 | else if (IS_FPUSH (inst)) |
| 454 | { |
| 455 | if (read_register (FPSCR_REGNUM) & FPSCR_SZ) |
| 456 | { |
| 457 | cache->sp_offset += 8; |
| 458 | } |
| 459 | else |
| 460 | { |
| 461 | cache->sp_offset += 4; |
| 462 | } |
| 463 | } |
| 464 | else if (IS_MOV_SP_FP (inst)) |
| 465 | { |
| 466 | if (!cache->uses_fp) |
| 467 | cache->uses_fp = 1; |
| 468 | /* At this point, only allow argument register moves to other |
| 469 | registers or argument register moves to @(X,fp) which are |
| 470 | moving the register arguments onto the stack area allocated |
| 471 | by a former add somenumber to SP call. Don't allow moving |
| 472 | to an fp indirect address above fp + cache->sp_offset. */ |
| 473 | pc += 2; |
| 474 | for (opc = pc + 12; pc < opc; pc += 2) |
| 475 | { |
| 476 | inst = read_memory_integer (pc, 2); |
| 477 | if (IS_MOV_ARG_TO_IND_R14 (inst)) |
| 478 | { |
| 479 | reg = GET_SOURCE_REG (inst); |
| 480 | if (cache->sp_offset > 0) |
| 481 | cache->saved_regs[reg] = cache->sp_offset; |
| 482 | } |
| 483 | else if (IS_MOV_ARG_TO_IND_R14_WITH_DISP (inst)) |
| 484 | { |
| 485 | reg = GET_SOURCE_REG (inst); |
| 486 | offset = (inst & 0xf) * 4; |
| 487 | if (cache->sp_offset > offset) |
| 488 | cache->saved_regs[reg] = cache->sp_offset - offset; |
| 489 | } |
| 490 | else if (IS_MOV_ARG_TO_REG (inst)) |
| 491 | continue; |
| 492 | else |
| 493 | break; |
| 494 | } |
| 495 | break; |
| 496 | } |
| 497 | #if 0 /* This used to just stop when it found an instruction that |
| 498 | was not considered part of the prologue. Now, we just |
| 499 | keep going looking for likely instructions. */ |
| 500 | else |
| 501 | break; |
| 502 | #endif |
| 503 | } |
| 504 | |
| 505 | return pc; |
| 506 | } |
| 507 | |
| 508 | /* Skip any prologue before the guts of a function */ |
| 509 | |
| 510 | /* Skip the prologue using the debug information. If this fails we'll |
| 511 | fall back on the 'guess' method below. */ |
| 512 | static CORE_ADDR |
| 513 | after_prologue (CORE_ADDR pc) |
| 514 | { |
| 515 | struct symtab_and_line sal; |
| 516 | CORE_ADDR func_addr, func_end; |
| 517 | |
| 518 | /* If we can not find the symbol in the partial symbol table, then |
| 519 | there is no hope we can determine the function's start address |
| 520 | with this code. */ |
| 521 | if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 522 | return 0; |
| 523 | |
| 524 | /* Get the line associated with FUNC_ADDR. */ |
| 525 | sal = find_pc_line (func_addr, 0); |
| 526 | |
| 527 | /* There are only two cases to consider. First, the end of the source line |
| 528 | is within the function bounds. In that case we return the end of the |
| 529 | source line. Second is the end of the source line extends beyond the |
| 530 | bounds of the current function. We need to use the slow code to |
| 531 | examine instructions in that case. */ |
| 532 | if (sal.end < func_end) |
| 533 | return sal.end; |
| 534 | else |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | static CORE_ADDR |
| 539 | sh_skip_prologue (CORE_ADDR start_pc) |
| 540 | { |
| 541 | CORE_ADDR pc; |
| 542 | struct sh_frame_cache cache; |
| 543 | |
| 544 | /* See if we can determine the end of the prologue via the symbol table. |
| 545 | If so, then return either PC, or the PC after the prologue, whichever |
| 546 | is greater. */ |
| 547 | pc = after_prologue (start_pc); |
| 548 | |
| 549 | /* If after_prologue returned a useful address, then use it. Else |
| 550 | fall back on the instruction skipping code. */ |
| 551 | if (pc) |
| 552 | return max (pc, start_pc); |
| 553 | |
| 554 | cache.sp_offset = -4; |
| 555 | pc = sh_analyze_prologue (start_pc, (CORE_ADDR) -1, &cache); |
| 556 | if (!cache.uses_fp) |
| 557 | return start_pc; |
| 558 | |
| 559 | return pc; |
| 560 | } |
| 561 | |
| 562 | /* Should call_function allocate stack space for a struct return? */ |
| 563 | static int |
| 564 | sh_use_struct_convention (int gcc_p, struct type *type) |
| 565 | { |
| 566 | int len = TYPE_LENGTH (type); |
| 567 | int nelem = TYPE_NFIELDS (type); |
| 568 | return ((len != 1 && len != 2 && len != 4 && len != 8) || nelem != 1) && |
| 569 | (len != 8 || TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) != 4); |
| 570 | } |
| 571 | |
| 572 | /* Extract from an array REGBUF containing the (raw) register state |
| 573 | the address in which a function should return its structure value, |
| 574 | as a CORE_ADDR (or an expression that can be used as one). */ |
| 575 | static CORE_ADDR |
| 576 | sh_extract_struct_value_address (struct regcache *regcache) |
| 577 | { |
| 578 | ULONGEST addr; |
| 579 | |
| 580 | regcache_cooked_read_unsigned (regcache, STRUCT_RETURN_REGNUM, &addr); |
| 581 | return addr; |
| 582 | } |
| 583 | |
| 584 | static CORE_ADDR |
| 585 | sh_frame_align (struct gdbarch *ignore, CORE_ADDR sp) |
| 586 | { |
| 587 | return sp & ~3; |
| 588 | } |
| 589 | |
| 590 | /* Function: push_dummy_call (formerly push_arguments) |
| 591 | Setup the function arguments for calling a function in the inferior. |
| 592 | |
| 593 | On the Hitachi SH architecture, there are four registers (R4 to R7) |
| 594 | which are dedicated for passing function arguments. Up to the first |
| 595 | four arguments (depending on size) may go into these registers. |
| 596 | The rest go on the stack. |
| 597 | |
| 598 | MVS: Except on SH variants that have floating point registers. |
| 599 | In that case, float and double arguments are passed in the same |
| 600 | manner, but using FP registers instead of GP registers. |
| 601 | |
| 602 | Arguments that are smaller than 4 bytes will still take up a whole |
| 603 | register or a whole 32-bit word on the stack, and will be |
| 604 | right-justified in the register or the stack word. This includes |
| 605 | chars, shorts, and small aggregate types. |
| 606 | |
| 607 | Arguments that are larger than 4 bytes may be split between two or |
| 608 | more registers. If there are not enough registers free, an argument |
| 609 | may be passed partly in a register (or registers), and partly on the |
| 610 | stack. This includes doubles, long longs, and larger aggregates. |
| 611 | As far as I know, there is no upper limit to the size of aggregates |
| 612 | that will be passed in this way; in other words, the convention of |
| 613 | passing a pointer to a large aggregate instead of a copy is not used. |
| 614 | |
| 615 | MVS: The above appears to be true for the SH variants that do not |
| 616 | have an FPU, however those that have an FPU appear to copy the |
| 617 | aggregate argument onto the stack (and not place it in registers) |
| 618 | if it is larger than 16 bytes (four GP registers). |
| 619 | |
| 620 | An exceptional case exists for struct arguments (and possibly other |
| 621 | aggregates such as arrays) if the size is larger than 4 bytes but |
| 622 | not a multiple of 4 bytes. In this case the argument is never split |
| 623 | between the registers and the stack, but instead is copied in its |
| 624 | entirety onto the stack, AND also copied into as many registers as |
| 625 | there is room for. In other words, space in registers permitting, |
| 626 | two copies of the same argument are passed in. As far as I can tell, |
| 627 | only the one on the stack is used, although that may be a function |
| 628 | of the level of compiler optimization. I suspect this is a compiler |
| 629 | bug. Arguments of these odd sizes are left-justified within the |
| 630 | word (as opposed to arguments smaller than 4 bytes, which are |
| 631 | right-justified). |
| 632 | |
| 633 | If the function is to return an aggregate type such as a struct, it |
| 634 | is either returned in the normal return value register R0 (if its |
| 635 | size is no greater than one byte), or else the caller must allocate |
| 636 | space into which the callee will copy the return value (if the size |
| 637 | is greater than one byte). In this case, a pointer to the return |
| 638 | value location is passed into the callee in register R2, which does |
| 639 | not displace any of the other arguments passed in via registers R4 |
| 640 | to R7. */ |
| 641 | |
| 642 | /* Helper function to justify value in register according to endianess. */ |
| 643 | static char * |
| 644 | sh_justify_value_in_reg (struct value *val, int len) |
| 645 | { |
| 646 | static char valbuf[4]; |
| 647 | |
| 648 | memset (valbuf, 0, sizeof (valbuf)); |
| 649 | if (len < 4) |
| 650 | { |
| 651 | /* value gets right-justified in the register or stack word */ |
| 652 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| 653 | memcpy (valbuf + (4 - len), (char *) VALUE_CONTENTS (val), len); |
| 654 | else |
| 655 | memcpy (valbuf, (char *) VALUE_CONTENTS (val), len); |
| 656 | return valbuf; |
| 657 | } |
| 658 | return (char *) VALUE_CONTENTS (val); |
| 659 | } |
| 660 | |
| 661 | /* Helper function to eval number of bytes to allocate on stack. */ |
| 662 | static CORE_ADDR |
| 663 | sh_stack_allocsize (int nargs, struct value **args) |
| 664 | { |
| 665 | int stack_alloc = 0; |
| 666 | while (nargs-- > 0) |
| 667 | stack_alloc += ((TYPE_LENGTH (VALUE_TYPE (args[nargs])) + 3) & ~3); |
| 668 | return stack_alloc; |
| 669 | } |
| 670 | |
| 671 | /* Helper functions for getting the float arguments right. Registers usage |
| 672 | depends on the ABI and the endianess. The comments should enlighten how |
| 673 | it's intended to work. */ |
| 674 | |
| 675 | /* This array stores which of the float arg registers are already in use. */ |
| 676 | static int flt_argreg_array[FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM + 1]; |
| 677 | |
| 678 | /* This function just resets the above array to "no reg used so far". */ |
| 679 | static void |
| 680 | sh_init_flt_argreg (void) |
| 681 | { |
| 682 | memset (flt_argreg_array, 0, sizeof flt_argreg_array); |
| 683 | } |
| 684 | |
| 685 | /* This function returns the next register to use for float arg passing. |
| 686 | It returns either a valid value between FLOAT_ARG0_REGNUM and |
| 687 | FLOAT_ARGLAST_REGNUM if a register is available, otherwise it returns |
| 688 | FLOAT_ARGLAST_REGNUM + 1 to indicate that no register is available. |
| 689 | |
| 690 | Note that register number 0 in flt_argreg_array corresponds with the |
| 691 | real float register fr4. In contrast to FLOAT_ARG0_REGNUM (value is |
| 692 | 29) the parity of the register number is preserved, which is important |
| 693 | for the double register passing test (see the "argreg & 1" test below). */ |
| 694 | static int |
| 695 | sh_next_flt_argreg (int len) |
| 696 | { |
| 697 | int argreg; |
| 698 | |
| 699 | /* First search for the next free register. */ |
| 700 | for (argreg = 0; argreg <= FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM; |
| 701 | ++argreg) |
| 702 | if (!flt_argreg_array[argreg]) |
| 703 | break; |
| 704 | |
| 705 | /* No register left? */ |
| 706 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 707 | return FLOAT_ARGLAST_REGNUM + 1; |
| 708 | |
| 709 | if (len == 8) |
| 710 | { |
| 711 | /* Doubles are always starting in a even register number. */ |
| 712 | if (argreg & 1) |
| 713 | { |
| 714 | flt_argreg_array[argreg] = 1; |
| 715 | |
| 716 | ++argreg; |
| 717 | |
| 718 | /* No register left? */ |
| 719 | if (argreg > FLOAT_ARGLAST_REGNUM - FLOAT_ARG0_REGNUM) |
| 720 | return FLOAT_ARGLAST_REGNUM + 1; |
| 721 | } |
| 722 | /* Also mark the next register as used. */ |
| 723 | flt_argreg_array[argreg + 1] = 1; |
| 724 | } |
| 725 | else if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE) |
| 726 | { |
| 727 | /* In little endian, gcc passes floats like this: f5, f4, f7, f6, ... */ |
| 728 | if (!flt_argreg_array[argreg + 1]) |
| 729 | ++argreg; |
| 730 | } |
| 731 | flt_argreg_array[argreg] = 1; |
| 732 | return FLOAT_ARG0_REGNUM + argreg; |
| 733 | } |
| 734 | |
| 735 | static CORE_ADDR |
| 736 | sh_push_dummy_call_fpu (struct gdbarch *gdbarch, |
| 737 | CORE_ADDR func_addr, |
| 738 | struct regcache *regcache, |
| 739 | CORE_ADDR bp_addr, int nargs, |
| 740 | struct value **args, |
| 741 | CORE_ADDR sp, int struct_return, |
| 742 | CORE_ADDR struct_addr) |
| 743 | { |
| 744 | int stack_offset = 0; |
| 745 | int argreg = ARG0_REGNUM; |
| 746 | int flt_argreg; |
| 747 | int argnum; |
| 748 | struct type *type; |
| 749 | CORE_ADDR regval; |
| 750 | char *val; |
| 751 | int len, reg_size; |
| 752 | int pass_on_stack; |
| 753 | |
| 754 | /* first force sp to a 4-byte alignment */ |
| 755 | sp = sh_frame_align (gdbarch, sp); |
| 756 | |
| 757 | if (struct_return) |
| 758 | regcache_cooked_write_unsigned (regcache, |
| 759 | STRUCT_RETURN_REGNUM, struct_addr); |
| 760 | |
| 761 | /* make room on stack for args */ |
| 762 | sp -= sh_stack_allocsize (nargs, args); |
| 763 | |
| 764 | /* Initialize float argument mechanism. */ |
| 765 | sh_init_flt_argreg (); |
| 766 | |
| 767 | /* Now load as many as possible of the first arguments into |
| 768 | registers, and push the rest onto the stack. There are 16 bytes |
| 769 | in four registers available. Loop thru args from first to last. */ |
| 770 | for (argnum = 0; argnum < nargs; argnum++) |
| 771 | { |
| 772 | type = VALUE_TYPE (args[argnum]); |
| 773 | len = TYPE_LENGTH (type); |
| 774 | val = sh_justify_value_in_reg (args[argnum], len); |
| 775 | |
| 776 | /* Some decisions have to be made how various types are handled. |
| 777 | This also differs in different ABIs. */ |
| 778 | pass_on_stack = 0; |
| 779 | if (len > 16) |
| 780 | pass_on_stack = 1; /* Types bigger than 16 bytes are passed on stack. */ |
| 781 | |
| 782 | /* Find out the next register to use for a floating point value. */ |
| 783 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 784 | flt_argreg = sh_next_flt_argreg (len); |
| 785 | |
| 786 | while (len > 0) |
| 787 | { |
| 788 | if ((TYPE_CODE (type) == TYPE_CODE_FLT |
| 789 | && flt_argreg > FLOAT_ARGLAST_REGNUM) |
| 790 | || argreg > ARGLAST_REGNUM || pass_on_stack) |
| 791 | { |
| 792 | /* The remainder of the data goes entirely on the stack, |
| 793 | 4-byte aligned. */ |
| 794 | reg_size = (len + 3) & ~3; |
| 795 | write_memory (sp + stack_offset, val, reg_size); |
| 796 | stack_offset += reg_size; |
| 797 | } |
| 798 | else if (TYPE_CODE (type) == TYPE_CODE_FLT |
| 799 | && flt_argreg <= FLOAT_ARGLAST_REGNUM) |
| 800 | { |
| 801 | /* Argument goes in a float argument register. */ |
| 802 | reg_size = register_size (gdbarch, flt_argreg); |
| 803 | regval = extract_unsigned_integer (val, reg_size); |
| 804 | regcache_cooked_write_unsigned (regcache, flt_argreg++, regval); |
| 805 | } |
| 806 | else if (argreg <= ARGLAST_REGNUM) |
| 807 | { |
| 808 | /* there's room in a register */ |
| 809 | reg_size = register_size (gdbarch, argreg); |
| 810 | regval = extract_unsigned_integer (val, reg_size); |
| 811 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 812 | } |
| 813 | /* Store the value reg_size bytes at a time. This means that things |
| 814 | larger than reg_size bytes may go partly in registers and partly |
| 815 | on the stack. */ |
| 816 | len -= reg_size; |
| 817 | val += reg_size; |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | /* Store return address. */ |
| 822 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 823 | |
| 824 | /* Update stack pointer. */ |
| 825 | regcache_cooked_write_unsigned (regcache, SP_REGNUM, sp); |
| 826 | |
| 827 | return sp; |
| 828 | } |
| 829 | |
| 830 | static CORE_ADDR |
| 831 | sh_push_dummy_call_nofpu (struct gdbarch *gdbarch, |
| 832 | CORE_ADDR func_addr, |
| 833 | struct regcache *regcache, |
| 834 | CORE_ADDR bp_addr, |
| 835 | int nargs, struct value **args, |
| 836 | CORE_ADDR sp, int struct_return, |
| 837 | CORE_ADDR struct_addr) |
| 838 | { |
| 839 | int stack_offset = 0; |
| 840 | int argreg = ARG0_REGNUM; |
| 841 | int argnum; |
| 842 | struct type *type; |
| 843 | CORE_ADDR regval; |
| 844 | char *val; |
| 845 | int len, reg_size; |
| 846 | |
| 847 | /* first force sp to a 4-byte alignment */ |
| 848 | sp = sh_frame_align (gdbarch, sp); |
| 849 | |
| 850 | if (struct_return) |
| 851 | regcache_cooked_write_unsigned (regcache, |
| 852 | STRUCT_RETURN_REGNUM, struct_addr); |
| 853 | |
| 854 | /* make room on stack for args */ |
| 855 | sp -= sh_stack_allocsize (nargs, args); |
| 856 | |
| 857 | /* Now load as many as possible of the first arguments into |
| 858 | registers, and push the rest onto the stack. There are 16 bytes |
| 859 | in four registers available. Loop thru args from first to last. */ |
| 860 | for (argnum = 0; argnum < nargs; argnum++) |
| 861 | { |
| 862 | type = VALUE_TYPE (args[argnum]); |
| 863 | len = TYPE_LENGTH (type); |
| 864 | val = sh_justify_value_in_reg (args[argnum], len); |
| 865 | |
| 866 | while (len > 0) |
| 867 | { |
| 868 | if (argreg > ARGLAST_REGNUM) |
| 869 | { |
| 870 | /* The remainder of the data goes entirely on the stack, |
| 871 | 4-byte aligned. */ |
| 872 | reg_size = (len + 3) & ~3; |
| 873 | write_memory (sp + stack_offset, val, reg_size); |
| 874 | stack_offset += reg_size; |
| 875 | } |
| 876 | else if (argreg <= ARGLAST_REGNUM) |
| 877 | { |
| 878 | /* there's room in a register */ |
| 879 | reg_size = register_size (gdbarch, argreg); |
| 880 | regval = extract_unsigned_integer (val, reg_size); |
| 881 | regcache_cooked_write_unsigned (regcache, argreg++, regval); |
| 882 | } |
| 883 | /* Store the value reg_size bytes at a time. This means that things |
| 884 | larger than reg_size bytes may go partly in registers and partly |
| 885 | on the stack. */ |
| 886 | len -= reg_size; |
| 887 | val += reg_size; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | /* Store return address. */ |
| 892 | regcache_cooked_write_unsigned (regcache, PR_REGNUM, bp_addr); |
| 893 | |
| 894 | /* Update stack pointer. */ |
| 895 | regcache_cooked_write_unsigned (regcache, SP_REGNUM, sp); |
| 896 | |
| 897 | return sp; |
| 898 | } |
| 899 | |
| 900 | /* Find a function's return value in the appropriate registers (in |
| 901 | regbuf), and copy it into valbuf. Extract from an array REGBUF |
| 902 | containing the (raw) register state a function return value of type |
| 903 | TYPE, and copy that, in virtual format, into VALBUF. */ |
| 904 | static void |
| 905 | sh_default_extract_return_value (struct type *type, struct regcache *regcache, |
| 906 | void *valbuf) |
| 907 | { |
| 908 | int len = TYPE_LENGTH (type); |
| 909 | int return_register = R0_REGNUM; |
| 910 | int offset; |
| 911 | |
| 912 | if (len <= 4) |
| 913 | { |
| 914 | ULONGEST c; |
| 915 | |
| 916 | regcache_cooked_read_unsigned (regcache, R0_REGNUM, &c); |
| 917 | store_unsigned_integer (valbuf, len, c); |
| 918 | } |
| 919 | else if (len == 8) |
| 920 | { |
| 921 | int i, regnum = R0_REGNUM; |
| 922 | for (i = 0; i < len; i += 4) |
| 923 | regcache_raw_read (regcache, regnum++, (char *) valbuf + i); |
| 924 | } |
| 925 | else |
| 926 | error ("bad size for return value"); |
| 927 | } |
| 928 | |
| 929 | static void |
| 930 | sh3e_sh4_extract_return_value (struct type *type, struct regcache *regcache, |
| 931 | void *valbuf) |
| 932 | { |
| 933 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 934 | { |
| 935 | int len = TYPE_LENGTH (type); |
| 936 | int i, regnum = FP0_REGNUM; |
| 937 | for (i = 0; i < len; i += 4) |
| 938 | regcache_raw_read (regcache, regnum++, (char *) valbuf + i); |
| 939 | } |
| 940 | else |
| 941 | sh_default_extract_return_value (type, regcache, valbuf); |
| 942 | } |
| 943 | |
| 944 | /* Write into appropriate registers a function return value |
| 945 | of type TYPE, given in virtual format. |
| 946 | If the architecture is sh4 or sh3e, store a function's return value |
| 947 | in the R0 general register or in the FP0 floating point register, |
| 948 | depending on the type of the return value. In all the other cases |
| 949 | the result is stored in r0, left-justified. */ |
| 950 | static void |
| 951 | sh_default_store_return_value (struct type *type, struct regcache *regcache, |
| 952 | const void *valbuf) |
| 953 | { |
| 954 | ULONGEST val; |
| 955 | int len = TYPE_LENGTH (type); |
| 956 | |
| 957 | if (len <= 4) |
| 958 | { |
| 959 | val = extract_unsigned_integer (valbuf, len); |
| 960 | regcache_cooked_write_unsigned (regcache, R0_REGNUM, val); |
| 961 | } |
| 962 | else |
| 963 | { |
| 964 | int i, regnum = R0_REGNUM; |
| 965 | for (i = 0; i < len; i += 4) |
| 966 | regcache_raw_write (regcache, regnum++, (char *) valbuf + i); |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | static void |
| 971 | sh3e_sh4_store_return_value (struct type *type, struct regcache *regcache, |
| 972 | const void *valbuf) |
| 973 | { |
| 974 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 975 | { |
| 976 | int len = TYPE_LENGTH (type); |
| 977 | int i, regnum = FP0_REGNUM; |
| 978 | for (i = 0; i < len; i += 4) |
| 979 | regcache_raw_write (regcache, regnum++, (char *) valbuf + i); |
| 980 | } |
| 981 | else |
| 982 | sh_default_store_return_value (type, regcache, valbuf); |
| 983 | } |
| 984 | |
| 985 | /* Print the registers in a form similar to the E7000 */ |
| 986 | |
| 987 | static void |
| 988 | sh_generic_show_regs (void) |
| 989 | { |
| 990 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 991 | paddr (read_register (PC_REGNUM)), |
| 992 | (long) read_register (SR_REGNUM), |
| 993 | (long) read_register (PR_REGNUM), |
| 994 | (long) read_register (MACH_REGNUM), |
| 995 | (long) read_register (MACL_REGNUM)); |
| 996 | |
| 997 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 998 | (long) read_register (GBR_REGNUM), |
| 999 | (long) read_register (VBR_REGNUM)); |
| 1000 | |
| 1001 | printf_filtered |
| 1002 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1003 | (long) read_register (0), (long) read_register (1), |
| 1004 | (long) read_register (2), (long) read_register (3), |
| 1005 | (long) read_register (4), (long) read_register (5), |
| 1006 | (long) read_register (6), (long) read_register (7)); |
| 1007 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1008 | (long) read_register (8), (long) read_register (9), |
| 1009 | (long) read_register (10), (long) read_register (11), |
| 1010 | (long) read_register (12), (long) read_register (13), |
| 1011 | (long) read_register (14), (long) read_register (15)); |
| 1012 | } |
| 1013 | |
| 1014 | static void |
| 1015 | sh3_show_regs (void) |
| 1016 | { |
| 1017 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1018 | paddr (read_register (PC_REGNUM)), |
| 1019 | (long) read_register (SR_REGNUM), |
| 1020 | (long) read_register (PR_REGNUM), |
| 1021 | (long) read_register (MACH_REGNUM), |
| 1022 | (long) read_register (MACL_REGNUM)); |
| 1023 | |
| 1024 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1025 | (long) read_register (GBR_REGNUM), |
| 1026 | (long) read_register (VBR_REGNUM)); |
| 1027 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1028 | (long) read_register (SSR_REGNUM), |
| 1029 | (long) read_register (SPC_REGNUM)); |
| 1030 | |
| 1031 | printf_filtered |
| 1032 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1033 | (long) read_register (0), (long) read_register (1), |
| 1034 | (long) read_register (2), (long) read_register (3), |
| 1035 | (long) read_register (4), (long) read_register (5), |
| 1036 | (long) read_register (6), (long) read_register (7)); |
| 1037 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1038 | (long) read_register (8), (long) read_register (9), |
| 1039 | (long) read_register (10), (long) read_register (11), |
| 1040 | (long) read_register (12), (long) read_register (13), |
| 1041 | (long) read_register (14), (long) read_register (15)); |
| 1042 | } |
| 1043 | |
| 1044 | |
| 1045 | static void |
| 1046 | sh2e_show_regs (void) |
| 1047 | { |
| 1048 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1049 | paddr (read_register (PC_REGNUM)), |
| 1050 | (long) read_register (SR_REGNUM), |
| 1051 | (long) read_register (PR_REGNUM), |
| 1052 | (long) read_register (MACH_REGNUM), |
| 1053 | (long) read_register (MACL_REGNUM)); |
| 1054 | |
| 1055 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1056 | (long) read_register (GBR_REGNUM), |
| 1057 | (long) read_register (VBR_REGNUM)); |
| 1058 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1059 | (long) read_register (FPUL_REGNUM), |
| 1060 | (long) read_register (FPSCR_REGNUM)); |
| 1061 | |
| 1062 | printf_filtered |
| 1063 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1064 | (long) read_register (0), (long) read_register (1), |
| 1065 | (long) read_register (2), (long) read_register (3), |
| 1066 | (long) read_register (4), (long) read_register (5), |
| 1067 | (long) read_register (6), (long) read_register (7)); |
| 1068 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1069 | (long) read_register (8), (long) read_register (9), |
| 1070 | (long) read_register (10), (long) read_register (11), |
| 1071 | (long) read_register (12), (long) read_register (13), |
| 1072 | (long) read_register (14), (long) read_register (15)); |
| 1073 | |
| 1074 | 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)); |
| 1075 | 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)); |
| 1076 | } |
| 1077 | |
| 1078 | static void |
| 1079 | sh3e_show_regs (void) |
| 1080 | { |
| 1081 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1082 | paddr (read_register (PC_REGNUM)), |
| 1083 | (long) read_register (SR_REGNUM), |
| 1084 | (long) read_register (PR_REGNUM), |
| 1085 | (long) read_register (MACH_REGNUM), |
| 1086 | (long) read_register (MACL_REGNUM)); |
| 1087 | |
| 1088 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1089 | (long) read_register (GBR_REGNUM), |
| 1090 | (long) read_register (VBR_REGNUM)); |
| 1091 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1092 | (long) read_register (SSR_REGNUM), |
| 1093 | (long) read_register (SPC_REGNUM)); |
| 1094 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1095 | (long) read_register (FPUL_REGNUM), |
| 1096 | (long) read_register (FPSCR_REGNUM)); |
| 1097 | |
| 1098 | printf_filtered |
| 1099 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1100 | (long) read_register (0), (long) read_register (1), |
| 1101 | (long) read_register (2), (long) read_register (3), |
| 1102 | (long) read_register (4), (long) read_register (5), |
| 1103 | (long) read_register (6), (long) read_register (7)); |
| 1104 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1105 | (long) read_register (8), (long) read_register (9), |
| 1106 | (long) read_register (10), (long) read_register (11), |
| 1107 | (long) read_register (12), (long) read_register (13), |
| 1108 | (long) read_register (14), (long) read_register (15)); |
| 1109 | |
| 1110 | 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)); |
| 1111 | 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)); |
| 1112 | } |
| 1113 | |
| 1114 | static void |
| 1115 | sh3_dsp_show_regs (void) |
| 1116 | { |
| 1117 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1118 | paddr (read_register (PC_REGNUM)), |
| 1119 | (long) read_register (SR_REGNUM), |
| 1120 | (long) read_register (PR_REGNUM), |
| 1121 | (long) read_register (MACH_REGNUM), |
| 1122 | (long) read_register (MACL_REGNUM)); |
| 1123 | |
| 1124 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1125 | (long) read_register (GBR_REGNUM), |
| 1126 | (long) read_register (VBR_REGNUM)); |
| 1127 | |
| 1128 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1129 | (long) read_register (SSR_REGNUM), |
| 1130 | (long) read_register (SPC_REGNUM)); |
| 1131 | |
| 1132 | printf_filtered (" DSR=%08lx", (long) read_register (DSR_REGNUM)); |
| 1133 | |
| 1134 | printf_filtered |
| 1135 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1136 | (long) read_register (0), (long) read_register (1), |
| 1137 | (long) read_register (2), (long) read_register (3), |
| 1138 | (long) read_register (4), (long) read_register (5), |
| 1139 | (long) read_register (6), (long) read_register (7)); |
| 1140 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1141 | (long) read_register (8), (long) read_register (9), |
| 1142 | (long) read_register (10), (long) read_register (11), |
| 1143 | (long) read_register (12), (long) read_register (13), |
| 1144 | (long) read_register (14), (long) read_register (15)); |
| 1145 | |
| 1146 | printf_filtered |
| 1147 | ("A0G=%02lx A0=%08lx M0=%08lx X0=%08lx Y0=%08lx RS=%08lx MOD=%08lx\n", |
| 1148 | (long) read_register (A0G_REGNUM) & 0xff, |
| 1149 | (long) read_register (A0_REGNUM), (long) read_register (M0_REGNUM), |
| 1150 | (long) read_register (X0_REGNUM), (long) read_register (Y0_REGNUM), |
| 1151 | (long) read_register (RS_REGNUM), (long) read_register (MOD_REGNUM)); |
| 1152 | printf_filtered ("A1G=%02lx A1=%08lx M1=%08lx X1=%08lx Y1=%08lx RE=%08lx\n", |
| 1153 | (long) read_register (A1G_REGNUM) & 0xff, |
| 1154 | (long) read_register (A1_REGNUM), |
| 1155 | (long) read_register (M1_REGNUM), |
| 1156 | (long) read_register (X1_REGNUM), |
| 1157 | (long) read_register (Y1_REGNUM), |
| 1158 | (long) read_register (RE_REGNUM)); |
| 1159 | } |
| 1160 | |
| 1161 | static void |
| 1162 | sh4_show_regs (void) |
| 1163 | { |
| 1164 | int pr = read_register (FPSCR_REGNUM) & 0x80000; |
| 1165 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1166 | paddr (read_register (PC_REGNUM)), |
| 1167 | (long) read_register (SR_REGNUM), |
| 1168 | (long) read_register (PR_REGNUM), |
| 1169 | (long) read_register (MACH_REGNUM), |
| 1170 | (long) read_register (MACL_REGNUM)); |
| 1171 | |
| 1172 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1173 | (long) read_register (GBR_REGNUM), |
| 1174 | (long) read_register (VBR_REGNUM)); |
| 1175 | printf_filtered (" SSR=%08lx SPC=%08lx", |
| 1176 | (long) read_register (SSR_REGNUM), |
| 1177 | (long) read_register (SPC_REGNUM)); |
| 1178 | printf_filtered (" FPUL=%08lx FPSCR=%08lx", |
| 1179 | (long) read_register (FPUL_REGNUM), |
| 1180 | (long) read_register (FPSCR_REGNUM)); |
| 1181 | |
| 1182 | printf_filtered |
| 1183 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1184 | (long) read_register (0), (long) read_register (1), |
| 1185 | (long) read_register (2), (long) read_register (3), |
| 1186 | (long) read_register (4), (long) read_register (5), |
| 1187 | (long) read_register (6), (long) read_register (7)); |
| 1188 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1189 | (long) read_register (8), (long) read_register (9), |
| 1190 | (long) read_register (10), (long) read_register (11), |
| 1191 | (long) read_register (12), (long) read_register (13), |
| 1192 | (long) read_register (14), (long) read_register (15)); |
| 1193 | |
| 1194 | printf_filtered ((pr |
| 1195 | ? "DR0-DR6 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" |
| 1196 | : |
| 1197 | "FP0-FP7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1198 | (long) read_register (FP0_REGNUM + 0), |
| 1199 | (long) read_register (FP0_REGNUM + 1), |
| 1200 | (long) read_register (FP0_REGNUM + 2), |
| 1201 | (long) read_register (FP0_REGNUM + 3), |
| 1202 | (long) read_register (FP0_REGNUM + 4), |
| 1203 | (long) read_register (FP0_REGNUM + 5), |
| 1204 | (long) read_register (FP0_REGNUM + 6), |
| 1205 | (long) read_register (FP0_REGNUM + 7)); |
| 1206 | printf_filtered ((pr ? |
| 1207 | "DR8-DR14 %08lx%08lx %08lx%08lx %08lx%08lx %08lx%08lx\n" : |
| 1208 | "FP8-FP15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n"), |
| 1209 | (long) read_register (FP0_REGNUM + 8), |
| 1210 | (long) read_register (FP0_REGNUM + 9), |
| 1211 | (long) read_register (FP0_REGNUM + 10), |
| 1212 | (long) read_register (FP0_REGNUM + 11), |
| 1213 | (long) read_register (FP0_REGNUM + 12), |
| 1214 | (long) read_register (FP0_REGNUM + 13), |
| 1215 | (long) read_register (FP0_REGNUM + 14), |
| 1216 | (long) read_register (FP0_REGNUM + 15)); |
| 1217 | } |
| 1218 | |
| 1219 | static void |
| 1220 | sh_dsp_show_regs (void) |
| 1221 | { |
| 1222 | printf_filtered ("PC=%s SR=%08lx PR=%08lx MACH=%08lx MACHL=%08lx\n", |
| 1223 | paddr (read_register (PC_REGNUM)), |
| 1224 | (long) read_register (SR_REGNUM), |
| 1225 | (long) read_register (PR_REGNUM), |
| 1226 | (long) read_register (MACH_REGNUM), |
| 1227 | (long) read_register (MACL_REGNUM)); |
| 1228 | |
| 1229 | printf_filtered ("GBR=%08lx VBR=%08lx", |
| 1230 | (long) read_register (GBR_REGNUM), |
| 1231 | (long) read_register (VBR_REGNUM)); |
| 1232 | |
| 1233 | printf_filtered (" DSR=%08lx", (long) read_register (DSR_REGNUM)); |
| 1234 | |
| 1235 | printf_filtered |
| 1236 | ("\nR0-R7 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1237 | (long) read_register (0), (long) read_register (1), |
| 1238 | (long) read_register (2), (long) read_register (3), |
| 1239 | (long) read_register (4), (long) read_register (5), |
| 1240 | (long) read_register (6), (long) read_register (7)); |
| 1241 | printf_filtered ("R8-R15 %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", |
| 1242 | (long) read_register (8), (long) read_register (9), |
| 1243 | (long) read_register (10), (long) read_register (11), |
| 1244 | (long) read_register (12), (long) read_register (13), |
| 1245 | (long) read_register (14), (long) read_register (15)); |
| 1246 | |
| 1247 | printf_filtered |
| 1248 | ("A0G=%02lx A0=%08lx M0=%08lx X0=%08lx Y0=%08lx RS=%08lx MOD=%08lx\n", |
| 1249 | (long) read_register (A0G_REGNUM) & 0xff, |
| 1250 | (long) read_register (A0_REGNUM), (long) read_register (M0_REGNUM), |
| 1251 | (long) read_register (X0_REGNUM), (long) read_register (Y0_REGNUM), |
| 1252 | (long) read_register (RS_REGNUM), (long) read_register (MOD_REGNUM)); |
| 1253 | printf_filtered ("A1G=%02lx A1=%08lx M1=%08lx X1=%08lx Y1=%08lx RE=%08lx\n", |
| 1254 | (long) read_register (A1G_REGNUM) & 0xff, |
| 1255 | (long) read_register (A1_REGNUM), |
| 1256 | (long) read_register (M1_REGNUM), |
| 1257 | (long) read_register (X1_REGNUM), |
| 1258 | (long) read_register (Y1_REGNUM), |
| 1259 | (long) read_register (RE_REGNUM)); |
| 1260 | } |
| 1261 | |
| 1262 | static void |
| 1263 | sh_show_regs_command (char *args, int from_tty) |
| 1264 | { |
| 1265 | if (sh_show_regs) |
| 1266 | (*sh_show_regs) (); |
| 1267 | } |
| 1268 | |
| 1269 | /* Return the GDB type object for the "standard" data type |
| 1270 | of data in register N. */ |
| 1271 | static struct type * |
| 1272 | sh_sh3e_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1273 | { |
| 1274 | if ((reg_nr >= FP0_REGNUM |
| 1275 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1276 | return builtin_type_float; |
| 1277 | else |
| 1278 | return builtin_type_int; |
| 1279 | } |
| 1280 | |
| 1281 | static struct type * |
| 1282 | sh_sh4_build_float_register_type (int high) |
| 1283 | { |
| 1284 | struct type *temp; |
| 1285 | |
| 1286 | temp = create_range_type (NULL, builtin_type_int, 0, high); |
| 1287 | return create_array_type (NULL, builtin_type_float, temp); |
| 1288 | } |
| 1289 | |
| 1290 | static struct type * |
| 1291 | sh_sh4_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1292 | { |
| 1293 | if ((reg_nr >= FP0_REGNUM |
| 1294 | && (reg_nr <= FP_LAST_REGNUM)) || (reg_nr == FPUL_REGNUM)) |
| 1295 | return builtin_type_float; |
| 1296 | else if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1297 | return builtin_type_double; |
| 1298 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1299 | return sh_sh4_build_float_register_type (3); |
| 1300 | else |
| 1301 | return builtin_type_int; |
| 1302 | } |
| 1303 | |
| 1304 | static struct type * |
| 1305 | sh_default_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 1306 | { |
| 1307 | return builtin_type_int; |
| 1308 | } |
| 1309 | |
| 1310 | /* On the sh4, the DRi pseudo registers are problematic if the target |
| 1311 | is little endian. When the user writes one of those registers, for |
| 1312 | instance with 'ser var $dr0=1', we want the double to be stored |
| 1313 | like this: |
| 1314 | fr0 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f |
| 1315 | fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1316 | |
| 1317 | This corresponds to little endian byte order & big endian word |
| 1318 | order. However if we let gdb write the register w/o conversion, it |
| 1319 | will write fr0 and fr1 this way: |
| 1320 | fr0 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1321 | fr1 = 0x00 0x00 0x00 0x00 0x00 0xf0 0x3f |
| 1322 | because it will consider fr0 and fr1 as a single LE stretch of memory. |
| 1323 | |
| 1324 | To achieve what we want we must force gdb to store things in |
| 1325 | floatformat_ieee_double_littlebyte_bigword (which is defined in |
| 1326 | include/floatformat.h and libiberty/floatformat.c. |
| 1327 | |
| 1328 | In case the target is big endian, there is no problem, the |
| 1329 | raw bytes will look like: |
| 1330 | fr0 = 0x3f 0xf0 0x00 0x00 0x00 0x00 0x00 |
| 1331 | fr1 = 0x00 0x00 0x00 0x00 0x00 0x00 0x00 |
| 1332 | |
| 1333 | The other pseudo registers (the FVs) also don't pose a problem |
| 1334 | because they are stored as 4 individual FP elements. */ |
| 1335 | |
| 1336 | static void |
| 1337 | sh_sh4_register_convert_to_virtual (int regnum, struct type *type, |
| 1338 | char *from, char *to) |
| 1339 | { |
| 1340 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1341 | { |
| 1342 | DOUBLEST val; |
| 1343 | floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1344 | from, &val); |
| 1345 | store_typed_floating (to, type, val); |
| 1346 | } |
| 1347 | else |
| 1348 | error |
| 1349 | ("sh_register_convert_to_virtual called with non DR register number"); |
| 1350 | } |
| 1351 | |
| 1352 | static void |
| 1353 | sh_sh4_register_convert_to_raw (struct type *type, int regnum, |
| 1354 | const void *from, void *to) |
| 1355 | { |
| 1356 | if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1357 | { |
| 1358 | DOUBLEST val = extract_typed_floating (from, type); |
| 1359 | floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword, |
| 1360 | &val, to); |
| 1361 | } |
| 1362 | else |
| 1363 | error ("sh_register_convert_to_raw called with non DR register number"); |
| 1364 | } |
| 1365 | |
| 1366 | /* For vectors of 4 floating point registers. */ |
| 1367 | static int |
| 1368 | fv_reg_base_num (int fv_regnum) |
| 1369 | { |
| 1370 | int fp_regnum; |
| 1371 | |
| 1372 | fp_regnum = FP0_REGNUM + (fv_regnum - FV0_REGNUM) * 4; |
| 1373 | return fp_regnum; |
| 1374 | } |
| 1375 | |
| 1376 | /* For double precision floating point registers, i.e 2 fp regs.*/ |
| 1377 | static int |
| 1378 | dr_reg_base_num (int dr_regnum) |
| 1379 | { |
| 1380 | int fp_regnum; |
| 1381 | |
| 1382 | fp_regnum = FP0_REGNUM + (dr_regnum - DR0_REGNUM) * 2; |
| 1383 | return fp_regnum; |
| 1384 | } |
| 1385 | |
| 1386 | static void |
| 1387 | sh_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1388 | int reg_nr, void *buffer) |
| 1389 | { |
| 1390 | int base_regnum, portion; |
| 1391 | char temp_buffer[MAX_REGISTER_SIZE]; |
| 1392 | |
| 1393 | if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1394 | { |
| 1395 | base_regnum = dr_reg_base_num (reg_nr); |
| 1396 | |
| 1397 | /* Build the value in the provided buffer. */ |
| 1398 | /* Read the real regs for which this one is an alias. */ |
| 1399 | for (portion = 0; portion < 2; portion++) |
| 1400 | regcache_raw_read (regcache, base_regnum + portion, |
| 1401 | (temp_buffer |
| 1402 | + register_size (gdbarch, |
| 1403 | base_regnum) * portion)); |
| 1404 | /* We must pay attention to the endiannes. */ |
| 1405 | sh_sh4_register_convert_to_virtual (reg_nr, |
| 1406 | gdbarch_register_type (gdbarch, |
| 1407 | reg_nr), |
| 1408 | temp_buffer, buffer); |
| 1409 | } |
| 1410 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1411 | { |
| 1412 | base_regnum = fv_reg_base_num (reg_nr); |
| 1413 | |
| 1414 | /* Read the real regs for which this one is an alias. */ |
| 1415 | for (portion = 0; portion < 4; portion++) |
| 1416 | regcache_raw_read (regcache, base_regnum + portion, |
| 1417 | ((char *) buffer |
| 1418 | + register_size (gdbarch, |
| 1419 | base_regnum) * portion)); |
| 1420 | } |
| 1421 | } |
| 1422 | |
| 1423 | static void |
| 1424 | sh_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1425 | int reg_nr, const void *buffer) |
| 1426 | { |
| 1427 | int base_regnum, portion; |
| 1428 | char temp_buffer[MAX_REGISTER_SIZE]; |
| 1429 | |
| 1430 | if (reg_nr >= DR0_REGNUM && reg_nr <= DR_LAST_REGNUM) |
| 1431 | { |
| 1432 | base_regnum = dr_reg_base_num (reg_nr); |
| 1433 | |
| 1434 | /* We must pay attention to the endiannes. */ |
| 1435 | sh_sh4_register_convert_to_raw (gdbarch_register_type (gdbarch, reg_nr), |
| 1436 | reg_nr, buffer, temp_buffer); |
| 1437 | |
| 1438 | /* Write the real regs for which this one is an alias. */ |
| 1439 | for (portion = 0; portion < 2; portion++) |
| 1440 | regcache_raw_write (regcache, base_regnum + portion, |
| 1441 | (temp_buffer |
| 1442 | + register_size (gdbarch, |
| 1443 | base_regnum) * portion)); |
| 1444 | } |
| 1445 | else if (reg_nr >= FV0_REGNUM && reg_nr <= FV_LAST_REGNUM) |
| 1446 | { |
| 1447 | base_regnum = fv_reg_base_num (reg_nr); |
| 1448 | |
| 1449 | /* Write the real regs for which this one is an alias. */ |
| 1450 | for (portion = 0; portion < 4; portion++) |
| 1451 | regcache_raw_write (regcache, base_regnum + portion, |
| 1452 | ((char *) buffer |
| 1453 | + register_size (gdbarch, |
| 1454 | base_regnum) * portion)); |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | /* Floating point vector of 4 float registers. */ |
| 1459 | static void |
| 1460 | do_fv_register_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 1461 | int fv_regnum) |
| 1462 | { |
| 1463 | int first_fp_reg_num = fv_reg_base_num (fv_regnum); |
| 1464 | fprintf_filtered (file, "fv%d\t0x%08x\t0x%08x\t0x%08x\t0x%08x\n", |
| 1465 | fv_regnum - FV0_REGNUM, |
| 1466 | (int) read_register (first_fp_reg_num), |
| 1467 | (int) read_register (first_fp_reg_num + 1), |
| 1468 | (int) read_register (first_fp_reg_num + 2), |
| 1469 | (int) read_register (first_fp_reg_num + 3)); |
| 1470 | } |
| 1471 | |
| 1472 | /* Double precision registers. */ |
| 1473 | static void |
| 1474 | do_dr_register_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 1475 | int dr_regnum) |
| 1476 | { |
| 1477 | int first_fp_reg_num = dr_reg_base_num (dr_regnum); |
| 1478 | |
| 1479 | fprintf_filtered (file, "dr%d\t0x%08x%08x\n", |
| 1480 | dr_regnum - DR0_REGNUM, |
| 1481 | (int) read_register (first_fp_reg_num), |
| 1482 | (int) read_register (first_fp_reg_num + 1)); |
| 1483 | } |
| 1484 | |
| 1485 | static void |
| 1486 | sh_print_pseudo_register (struct gdbarch *gdbarch, struct ui_file *file, |
| 1487 | int regnum) |
| 1488 | { |
| 1489 | if (regnum < NUM_REGS || regnum >= NUM_REGS + NUM_PSEUDO_REGS) |
| 1490 | internal_error (__FILE__, __LINE__, |
| 1491 | "Invalid pseudo register number %d\n", regnum); |
| 1492 | else if (regnum >= DR0_REGNUM && regnum <= DR_LAST_REGNUM) |
| 1493 | do_dr_register_info (gdbarch, file, regnum); |
| 1494 | else if (regnum >= FV0_REGNUM && regnum <= FV_LAST_REGNUM) |
| 1495 | do_fv_register_info (gdbarch, file, regnum); |
| 1496 | } |
| 1497 | |
| 1498 | static void |
| 1499 | sh_do_fp_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 1500 | { /* do values for FP (float) regs */ |
| 1501 | char *raw_buffer; |
| 1502 | double flt; /* double extracted from raw hex data */ |
| 1503 | int inv; |
| 1504 | int j; |
| 1505 | |
| 1506 | /* Allocate space for the float. */ |
| 1507 | raw_buffer = (char *) alloca (register_size (gdbarch, FP0_REGNUM)); |
| 1508 | |
| 1509 | /* Get the data in raw format. */ |
| 1510 | if (!frame_register_read (get_selected_frame (), regnum, raw_buffer)) |
| 1511 | error ("can't read register %d (%s)", regnum, REGISTER_NAME (regnum)); |
| 1512 | |
| 1513 | /* Get the register as a number */ |
| 1514 | flt = unpack_double (builtin_type_float, raw_buffer, &inv); |
| 1515 | |
| 1516 | /* Print the name and some spaces. */ |
| 1517 | fputs_filtered (REGISTER_NAME (regnum), file); |
| 1518 | print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file); |
| 1519 | |
| 1520 | /* Print the value. */ |
| 1521 | if (inv) |
| 1522 | fprintf_filtered (file, "<invalid float>"); |
| 1523 | else |
| 1524 | fprintf_filtered (file, "%-10.9g", flt); |
| 1525 | |
| 1526 | /* Print the fp register as hex. */ |
| 1527 | fprintf_filtered (file, "\t(raw 0x"); |
| 1528 | for (j = 0; j < register_size (gdbarch, regnum); j++) |
| 1529 | { |
| 1530 | register int idx = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? j |
| 1531 | : register_size (gdbarch, regnum) - 1 - j; |
| 1532 | fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]); |
| 1533 | } |
| 1534 | fprintf_filtered (file, ")"); |
| 1535 | fprintf_filtered (file, "\n"); |
| 1536 | } |
| 1537 | |
| 1538 | static void |
| 1539 | sh_do_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 1540 | { |
| 1541 | char raw_buffer[MAX_REGISTER_SIZE]; |
| 1542 | |
| 1543 | fputs_filtered (REGISTER_NAME (regnum), file); |
| 1544 | print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file); |
| 1545 | |
| 1546 | /* Get the data in raw format. */ |
| 1547 | if (!frame_register_read (get_selected_frame (), regnum, raw_buffer)) |
| 1548 | fprintf_filtered (file, "*value not available*\n"); |
| 1549 | |
| 1550 | val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0, |
| 1551 | file, 'x', 1, 0, Val_pretty_default); |
| 1552 | fprintf_filtered (file, "\t"); |
| 1553 | val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0, |
| 1554 | file, 0, 1, 0, Val_pretty_default); |
| 1555 | fprintf_filtered (file, "\n"); |
| 1556 | } |
| 1557 | |
| 1558 | static void |
| 1559 | sh_print_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum) |
| 1560 | { |
| 1561 | if (regnum < 0 || regnum >= NUM_REGS + NUM_PSEUDO_REGS) |
| 1562 | internal_error (__FILE__, __LINE__, |
| 1563 | "Invalid register number %d\n", regnum); |
| 1564 | |
| 1565 | else if (regnum >= 0 && regnum < NUM_REGS) |
| 1566 | { |
| 1567 | if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == |
| 1568 | TYPE_CODE_FLT) |
| 1569 | sh_do_fp_register (gdbarch, file, regnum); /* FP regs */ |
| 1570 | else |
| 1571 | sh_do_register (gdbarch, file, regnum); /* All other regs */ |
| 1572 | } |
| 1573 | |
| 1574 | else if (regnum < NUM_REGS + NUM_PSEUDO_REGS) |
| 1575 | { |
| 1576 | sh_print_pseudo_register (gdbarch, file, regnum); |
| 1577 | } |
| 1578 | } |
| 1579 | |
| 1580 | static void |
| 1581 | sh_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 1582 | struct frame_info *frame, int regnum, int fpregs) |
| 1583 | { |
| 1584 | if (regnum != -1) /* do one specified register */ |
| 1585 | { |
| 1586 | if (*(REGISTER_NAME (regnum)) == '\0') |
| 1587 | error ("Not a valid register for the current processor type"); |
| 1588 | |
| 1589 | sh_print_register (gdbarch, file, regnum); |
| 1590 | } |
| 1591 | else |
| 1592 | /* do all (or most) registers */ |
| 1593 | { |
| 1594 | regnum = 0; |
| 1595 | while (regnum < NUM_REGS) |
| 1596 | { |
| 1597 | /* If the register name is empty, it is undefined for this |
| 1598 | processor, so don't display anything. */ |
| 1599 | if (REGISTER_NAME (regnum) == NULL |
| 1600 | || *(REGISTER_NAME (regnum)) == '\0') |
| 1601 | { |
| 1602 | regnum++; |
| 1603 | continue; |
| 1604 | } |
| 1605 | |
| 1606 | if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == |
| 1607 | TYPE_CODE_FLT) |
| 1608 | { |
| 1609 | if (fpregs) |
| 1610 | { |
| 1611 | /* true for "INFO ALL-REGISTERS" command */ |
| 1612 | sh_do_fp_register (gdbarch, file, regnum); /* FP regs */ |
| 1613 | regnum++; |
| 1614 | } |
| 1615 | else |
| 1616 | regnum += (FP_LAST_REGNUM - FP0_REGNUM); /* skip FP regs */ |
| 1617 | } |
| 1618 | else |
| 1619 | { |
| 1620 | sh_do_register (gdbarch, file, regnum); /* All other regs */ |
| 1621 | regnum++; |
| 1622 | } |
| 1623 | } |
| 1624 | |
| 1625 | if (fpregs) |
| 1626 | while (regnum < NUM_REGS + NUM_PSEUDO_REGS) |
| 1627 | { |
| 1628 | sh_print_pseudo_register (gdbarch, file, regnum); |
| 1629 | regnum++; |
| 1630 | } |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | #ifdef SVR4_SHARED_LIBS |
| 1635 | |
| 1636 | /* Fetch (and possibly build) an appropriate link_map_offsets structure |
| 1637 | for native i386 linux targets using the struct offsets defined in |
| 1638 | link.h (but without actual reference to that file). |
| 1639 | |
| 1640 | This makes it possible to access i386-linux shared libraries from |
| 1641 | a gdb that was not built on an i386-linux host (for cross debugging). |
| 1642 | */ |
| 1643 | |
| 1644 | struct link_map_offsets * |
| 1645 | sh_linux_svr4_fetch_link_map_offsets (void) |
| 1646 | { |
| 1647 | static struct link_map_offsets lmo; |
| 1648 | static struct link_map_offsets *lmp = 0; |
| 1649 | |
| 1650 | if (lmp == 0) |
| 1651 | { |
| 1652 | lmp = &lmo; |
| 1653 | |
| 1654 | lmo.r_debug_size = 8; /* 20 not actual size but all we need */ |
| 1655 | |
| 1656 | lmo.r_map_offset = 4; |
| 1657 | lmo.r_map_size = 4; |
| 1658 | |
| 1659 | lmo.link_map_size = 20; /* 552 not actual size but all we need */ |
| 1660 | |
| 1661 | lmo.l_addr_offset = 0; |
| 1662 | lmo.l_addr_size = 4; |
| 1663 | |
| 1664 | lmo.l_name_offset = 4; |
| 1665 | lmo.l_name_size = 4; |
| 1666 | |
| 1667 | lmo.l_next_offset = 12; |
| 1668 | lmo.l_next_size = 4; |
| 1669 | |
| 1670 | lmo.l_prev_offset = 16; |
| 1671 | lmo.l_prev_size = 4; |
| 1672 | } |
| 1673 | |
| 1674 | return lmp; |
| 1675 | } |
| 1676 | #endif /* SVR4_SHARED_LIBS */ |
| 1677 | |
| 1678 | static int |
| 1679 | sh_dsp_register_sim_regno (int nr) |
| 1680 | { |
| 1681 | if (legacy_register_sim_regno (nr) < 0) |
| 1682 | return legacy_register_sim_regno (nr); |
| 1683 | if (nr >= DSR_REGNUM && nr <= Y1_REGNUM) |
| 1684 | return nr - DSR_REGNUM + SIM_SH_DSR_REGNUM; |
| 1685 | if (nr == MOD_REGNUM) |
| 1686 | return SIM_SH_MOD_REGNUM; |
| 1687 | if (nr == RS_REGNUM) |
| 1688 | return SIM_SH_RS_REGNUM; |
| 1689 | if (nr == RE_REGNUM) |
| 1690 | return SIM_SH_RE_REGNUM; |
| 1691 | if (nr >= R0_BANK_REGNUM && nr <= R7_BANK_REGNUM) |
| 1692 | return nr - R0_BANK_REGNUM + SIM_SH_R0_BANK_REGNUM; |
| 1693 | return nr; |
| 1694 | } |
| 1695 | |
| 1696 | static struct sh_frame_cache * |
| 1697 | sh_alloc_frame_cache (void) |
| 1698 | { |
| 1699 | struct sh_frame_cache *cache; |
| 1700 | int i; |
| 1701 | |
| 1702 | cache = FRAME_OBSTACK_ZALLOC (struct sh_frame_cache); |
| 1703 | |
| 1704 | /* Base address. */ |
| 1705 | cache->base = 0; |
| 1706 | cache->saved_sp = 0; |
| 1707 | cache->sp_offset = 0; |
| 1708 | cache->pc = 0; |
| 1709 | |
| 1710 | /* Frameless until proven otherwise. */ |
| 1711 | cache->uses_fp = 0; |
| 1712 | |
| 1713 | /* Saved registers. We initialize these to -1 since zero is a valid |
| 1714 | offset (that's where fp is supposed to be stored). */ |
| 1715 | for (i = 0; i < SH_NUM_REGS; i++) |
| 1716 | { |
| 1717 | cache->saved_regs[i] = -1; |
| 1718 | } |
| 1719 | |
| 1720 | return cache; |
| 1721 | } |
| 1722 | |
| 1723 | static struct sh_frame_cache * |
| 1724 | sh_frame_cache (struct frame_info *next_frame, void **this_cache) |
| 1725 | { |
| 1726 | struct sh_frame_cache *cache; |
| 1727 | CORE_ADDR current_pc; |
| 1728 | int i; |
| 1729 | |
| 1730 | if (*this_cache) |
| 1731 | return *this_cache; |
| 1732 | |
| 1733 | cache = sh_alloc_frame_cache (); |
| 1734 | *this_cache = cache; |
| 1735 | |
| 1736 | /* In principle, for normal frames, fp holds the frame pointer, |
| 1737 | which holds the base address for the current stack frame. |
| 1738 | However, for functions that don't need it, the frame pointer is |
| 1739 | optional. For these "frameless" functions the frame pointer is |
| 1740 | actually the frame pointer of the calling frame. */ |
| 1741 | cache->base = frame_unwind_register_unsigned (next_frame, FP_REGNUM); |
| 1742 | if (cache->base == 0) |
| 1743 | return cache; |
| 1744 | |
| 1745 | cache->pc = frame_func_unwind (next_frame); |
| 1746 | current_pc = frame_pc_unwind (next_frame); |
| 1747 | if (cache->pc != 0) |
| 1748 | sh_analyze_prologue (cache->pc, current_pc, cache); |
| 1749 | |
| 1750 | if (!cache->uses_fp) |
| 1751 | { |
| 1752 | /* We didn't find a valid frame, which means that CACHE->base |
| 1753 | currently holds the frame pointer for our calling frame. If |
| 1754 | we're at the start of a function, or somewhere half-way its |
| 1755 | prologue, the function's frame probably hasn't been fully |
| 1756 | setup yet. Try to reconstruct the base address for the stack |
| 1757 | frame by looking at the stack pointer. For truly "frameless" |
| 1758 | functions this might work too. */ |
| 1759 | cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM); |
| 1760 | } |
| 1761 | |
| 1762 | /* Now that we have the base address for the stack frame we can |
| 1763 | calculate the value of sp in the calling frame. */ |
| 1764 | cache->saved_sp = cache->base + cache->sp_offset; |
| 1765 | |
| 1766 | /* Adjust all the saved registers such that they contain addresses |
| 1767 | instead of offsets. */ |
| 1768 | for (i = 0; i < SH_NUM_REGS; i++) |
| 1769 | if (cache->saved_regs[i] != -1) |
| 1770 | cache->saved_regs[i] = cache->saved_sp - cache->saved_regs[i] - 4; |
| 1771 | |
| 1772 | return cache; |
| 1773 | } |
| 1774 | |
| 1775 | static void |
| 1776 | sh_frame_prev_register (struct frame_info *next_frame, void **this_cache, |
| 1777 | int regnum, int *optimizedp, |
| 1778 | enum lval_type *lvalp, CORE_ADDR *addrp, |
| 1779 | int *realnump, void *valuep) |
| 1780 | { |
| 1781 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 1782 | |
| 1783 | gdb_assert (regnum >= 0); |
| 1784 | |
| 1785 | if (regnum == SP_REGNUM && cache->saved_sp) |
| 1786 | { |
| 1787 | *optimizedp = 0; |
| 1788 | *lvalp = not_lval; |
| 1789 | *addrp = 0; |
| 1790 | *realnump = -1; |
| 1791 | if (valuep) |
| 1792 | { |
| 1793 | /* Store the value. */ |
| 1794 | store_unsigned_integer (valuep, 4, cache->saved_sp); |
| 1795 | } |
| 1796 | return; |
| 1797 | } |
| 1798 | |
| 1799 | /* The PC of the previous frame is stored in the PR register of |
| 1800 | the current frame. Frob regnum so that we pull the value from |
| 1801 | the correct place. */ |
| 1802 | if (regnum == PC_REGNUM) |
| 1803 | regnum = PR_REGNUM; |
| 1804 | |
| 1805 | if (regnum < SH_NUM_REGS && cache->saved_regs[regnum] != -1) |
| 1806 | { |
| 1807 | *optimizedp = 0; |
| 1808 | *lvalp = lval_memory; |
| 1809 | *addrp = cache->saved_regs[regnum]; |
| 1810 | *realnump = -1; |
| 1811 | if (valuep) |
| 1812 | { |
| 1813 | /* Read the value in from memory. */ |
| 1814 | read_memory (*addrp, valuep, |
| 1815 | register_size (current_gdbarch, regnum)); |
| 1816 | } |
| 1817 | return; |
| 1818 | } |
| 1819 | |
| 1820 | frame_register_unwind (next_frame, regnum, |
| 1821 | optimizedp, lvalp, addrp, realnump, valuep); |
| 1822 | } |
| 1823 | |
| 1824 | static void |
| 1825 | sh_frame_this_id (struct frame_info *next_frame, void **this_cache, |
| 1826 | struct frame_id *this_id) |
| 1827 | { |
| 1828 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 1829 | |
| 1830 | /* This marks the outermost frame. */ |
| 1831 | if (cache->base == 0) |
| 1832 | return; |
| 1833 | |
| 1834 | *this_id = frame_id_build (cache->saved_sp, cache->pc); |
| 1835 | } |
| 1836 | |
| 1837 | static const struct frame_unwind sh_frame_unwind = { |
| 1838 | NORMAL_FRAME, |
| 1839 | sh_frame_this_id, |
| 1840 | sh_frame_prev_register |
| 1841 | }; |
| 1842 | |
| 1843 | static const struct frame_unwind * |
| 1844 | sh_frame_sniffer (struct frame_info *next_frame) |
| 1845 | { |
| 1846 | return &sh_frame_unwind; |
| 1847 | } |
| 1848 | |
| 1849 | static CORE_ADDR |
| 1850 | sh_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1851 | { |
| 1852 | return frame_unwind_register_unsigned (next_frame, SP_REGNUM); |
| 1853 | } |
| 1854 | |
| 1855 | static CORE_ADDR |
| 1856 | sh_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1857 | { |
| 1858 | return frame_unwind_register_unsigned (next_frame, PC_REGNUM); |
| 1859 | } |
| 1860 | |
| 1861 | static struct frame_id |
| 1862 | sh_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 1863 | { |
| 1864 | return frame_id_build (sh_unwind_sp (gdbarch, next_frame), |
| 1865 | frame_pc_unwind (next_frame)); |
| 1866 | } |
| 1867 | |
| 1868 | static CORE_ADDR |
| 1869 | sh_frame_base_address (struct frame_info *next_frame, void **this_cache) |
| 1870 | { |
| 1871 | struct sh_frame_cache *cache = sh_frame_cache (next_frame, this_cache); |
| 1872 | |
| 1873 | return cache->base; |
| 1874 | } |
| 1875 | |
| 1876 | static const struct frame_base sh_frame_base = { |
| 1877 | &sh_frame_unwind, |
| 1878 | sh_frame_base_address, |
| 1879 | sh_frame_base_address, |
| 1880 | sh_frame_base_address |
| 1881 | }; |
| 1882 | |
| 1883 | /* The epilogue is defined here as the area at the end of a function, |
| 1884 | either on the `ret' instruction itself or after an instruction which |
| 1885 | destroys the function's stack frame. */ |
| 1886 | static int |
| 1887 | sh_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 1888 | { |
| 1889 | CORE_ADDR func_addr = 0, func_end = 0; |
| 1890 | |
| 1891 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
| 1892 | { |
| 1893 | ULONGEST inst; |
| 1894 | /* The sh epilogue is max. 14 bytes long. Give another 14 bytes |
| 1895 | for a nop and some fixed data (e.g. big offsets) which are |
| 1896 | unfortunately also treated as part of the function (which |
| 1897 | means, they are below func_end. */ |
| 1898 | CORE_ADDR addr = func_end - 28; |
| 1899 | if (addr < func_addr + 4) |
| 1900 | addr = func_addr + 4; |
| 1901 | if (pc < addr) |
| 1902 | return 0; |
| 1903 | |
| 1904 | /* First search forward until hitting an rts. */ |
| 1905 | while (addr < func_end |
| 1906 | && !IS_RTS (read_memory_unsigned_integer (addr, 2))) |
| 1907 | addr += 2; |
| 1908 | if (addr >= func_end) |
| 1909 | return 0; |
| 1910 | |
| 1911 | /* At this point we should find a mov.l @r15+,r14 instruction, |
| 1912 | either before or after the rts. If not, then the function has |
| 1913 | probably no "normal" epilogue and we bail out here. */ |
| 1914 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 1915 | if (IS_RESTORE_FP (read_memory_unsigned_integer (addr - 2, 2))) |
| 1916 | addr -= 2; |
| 1917 | else if (!IS_RESTORE_FP (read_memory_unsigned_integer (addr + 2, 2))) |
| 1918 | return 0; |
| 1919 | |
| 1920 | /* Step over possible lds.l @r15+,pr. */ |
| 1921 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 1922 | if (IS_LDS (inst)) |
| 1923 | { |
| 1924 | addr -= 2; |
| 1925 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 1926 | } |
| 1927 | |
| 1928 | /* Step over possible mov r14,r15. */ |
| 1929 | if (IS_MOV_FP_SP (inst)) |
| 1930 | { |
| 1931 | addr -= 2; |
| 1932 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 1933 | } |
| 1934 | |
| 1935 | /* Now check for FP adjustments, using add #imm,r14 or add rX, r14 |
| 1936 | instructions. */ |
| 1937 | while (addr > func_addr + 4 |
| 1938 | && (IS_ADD_REG_TO_FP (inst) || IS_ADD_IMM_FP (inst))) |
| 1939 | { |
| 1940 | addr -= 2; |
| 1941 | inst = read_memory_unsigned_integer (addr - 2, 2); |
| 1942 | } |
| 1943 | |
| 1944 | if (pc >= addr) |
| 1945 | return 1; |
| 1946 | } |
| 1947 | return 0; |
| 1948 | } |
| 1949 | |
| 1950 | static gdbarch_init_ftype sh_gdbarch_init; |
| 1951 | |
| 1952 | static struct gdbarch * |
| 1953 | sh_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 1954 | { |
| 1955 | struct gdbarch *gdbarch; |
| 1956 | |
| 1957 | sh_show_regs = sh_generic_show_regs; |
| 1958 | switch (info.bfd_arch_info->mach) |
| 1959 | { |
| 1960 | case bfd_mach_sh2e: |
| 1961 | sh_show_regs = sh2e_show_regs; |
| 1962 | break; |
| 1963 | case bfd_mach_sh_dsp: |
| 1964 | sh_show_regs = sh_dsp_show_regs; |
| 1965 | break; |
| 1966 | |
| 1967 | case bfd_mach_sh3: |
| 1968 | sh_show_regs = sh3_show_regs; |
| 1969 | break; |
| 1970 | |
| 1971 | case bfd_mach_sh3e: |
| 1972 | sh_show_regs = sh3e_show_regs; |
| 1973 | break; |
| 1974 | |
| 1975 | case bfd_mach_sh3_dsp: |
| 1976 | sh_show_regs = sh3_dsp_show_regs; |
| 1977 | break; |
| 1978 | |
| 1979 | case bfd_mach_sh4: |
| 1980 | sh_show_regs = sh4_show_regs; |
| 1981 | break; |
| 1982 | |
| 1983 | case bfd_mach_sh5: |
| 1984 | sh_show_regs = sh64_show_regs; |
| 1985 | /* SH5 is handled entirely in sh64-tdep.c */ |
| 1986 | return sh64_gdbarch_init (info, arches); |
| 1987 | } |
| 1988 | |
| 1989 | /* If there is already a candidate, use it. */ |
| 1990 | arches = gdbarch_list_lookup_by_info (arches, &info); |
| 1991 | if (arches != NULL) |
| 1992 | return arches->gdbarch; |
| 1993 | |
| 1994 | /* None found, create a new architecture from the information |
| 1995 | provided. */ |
| 1996 | gdbarch = gdbarch_alloc (&info, NULL); |
| 1997 | |
| 1998 | set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
| 1999 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2000 | set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2001 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2002 | set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2003 | set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2004 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); |
| 2005 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2006 | |
| 2007 | set_gdbarch_num_regs (gdbarch, SH_NUM_REGS); |
| 2008 | set_gdbarch_sp_regnum (gdbarch, 15); |
| 2009 | set_gdbarch_pc_regnum (gdbarch, 16); |
| 2010 | set_gdbarch_fp0_regnum (gdbarch, -1); |
| 2011 | set_gdbarch_num_pseudo_regs (gdbarch, 0); |
| 2012 | |
| 2013 | set_gdbarch_register_type (gdbarch, sh_default_register_type); |
| 2014 | |
| 2015 | set_gdbarch_print_registers_info (gdbarch, sh_print_registers_info); |
| 2016 | |
| 2017 | set_gdbarch_breakpoint_from_pc (gdbarch, sh_breakpoint_from_pc); |
| 2018 | set_gdbarch_use_struct_convention (gdbarch, sh_use_struct_convention); |
| 2019 | |
| 2020 | set_gdbarch_print_insn (gdbarch, gdb_print_insn_sh); |
| 2021 | set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno); |
| 2022 | |
| 2023 | set_gdbarch_write_pc (gdbarch, generic_target_write_pc); |
| 2024 | |
| 2025 | set_gdbarch_store_return_value (gdbarch, sh_default_store_return_value); |
| 2026 | set_gdbarch_extract_return_value (gdbarch, sh_default_extract_return_value); |
| 2027 | set_gdbarch_extract_struct_value_address (gdbarch, |
| 2028 | sh_extract_struct_value_address); |
| 2029 | |
| 2030 | set_gdbarch_skip_prologue (gdbarch, sh_skip_prologue); |
| 2031 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 2032 | set_gdbarch_decr_pc_after_break (gdbarch, 0); |
| 2033 | set_gdbarch_function_start_offset (gdbarch, 0); |
| 2034 | |
| 2035 | set_gdbarch_push_dummy_code (gdbarch, sh_push_dummy_code); |
| 2036 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_nofpu); |
| 2037 | |
| 2038 | set_gdbarch_frame_args_skip (gdbarch, 0); |
| 2039 | set_gdbarch_frameless_function_invocation (gdbarch, |
| 2040 | frameless_look_for_prologue); |
| 2041 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
| 2042 | |
| 2043 | set_gdbarch_frame_align (gdbarch, sh_frame_align); |
| 2044 | set_gdbarch_unwind_sp (gdbarch, sh_unwind_sp); |
| 2045 | set_gdbarch_unwind_pc (gdbarch, sh_unwind_pc); |
| 2046 | set_gdbarch_unwind_dummy_id (gdbarch, sh_unwind_dummy_id); |
| 2047 | frame_base_set_default (gdbarch, &sh_frame_base); |
| 2048 | |
| 2049 | set_gdbarch_in_function_epilogue_p (gdbarch, sh_in_function_epilogue_p); |
| 2050 | |
| 2051 | switch (info.bfd_arch_info->mach) |
| 2052 | { |
| 2053 | case bfd_mach_sh: |
| 2054 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2055 | break; |
| 2056 | |
| 2057 | case bfd_mach_sh2: |
| 2058 | set_gdbarch_register_name (gdbarch, sh_sh_register_name); |
| 2059 | break; |
| 2060 | |
| 2061 | case bfd_mach_sh2e: |
| 2062 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2063 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2064 | |
| 2065 | set_gdbarch_register_name (gdbarch, sh_sh2e_register_name); |
| 2066 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2067 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2068 | set_gdbarch_store_return_value (gdbarch, sh3e_sh4_store_return_value); |
| 2069 | set_gdbarch_extract_return_value (gdbarch, |
| 2070 | sh3e_sh4_extract_return_value); |
| 2071 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2072 | break; |
| 2073 | |
| 2074 | case bfd_mach_sh_dsp: |
| 2075 | set_gdbarch_register_name (gdbarch, sh_sh_dsp_register_name); |
| 2076 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2077 | break; |
| 2078 | |
| 2079 | case bfd_mach_sh3: |
| 2080 | set_gdbarch_register_name (gdbarch, sh_sh3_register_name); |
| 2081 | break; |
| 2082 | |
| 2083 | case bfd_mach_sh3e: |
| 2084 | /* doubles on sh2e and sh3e are actually 4 byte. */ |
| 2085 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); |
| 2086 | |
| 2087 | set_gdbarch_register_name (gdbarch, sh_sh3e_register_name); |
| 2088 | set_gdbarch_register_type (gdbarch, sh_sh3e_register_type); |
| 2089 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2090 | set_gdbarch_store_return_value (gdbarch, sh3e_sh4_store_return_value); |
| 2091 | set_gdbarch_extract_return_value (gdbarch, |
| 2092 | sh3e_sh4_extract_return_value); |
| 2093 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2094 | break; |
| 2095 | |
| 2096 | case bfd_mach_sh3_dsp: |
| 2097 | set_gdbarch_register_name (gdbarch, sh_sh3_dsp_register_name); |
| 2098 | set_gdbarch_register_sim_regno (gdbarch, sh_dsp_register_sim_regno); |
| 2099 | break; |
| 2100 | |
| 2101 | case bfd_mach_sh4: |
| 2102 | set_gdbarch_register_name (gdbarch, sh_sh4_register_name); |
| 2103 | set_gdbarch_register_type (gdbarch, sh_sh4_register_type); |
| 2104 | set_gdbarch_fp0_regnum (gdbarch, 25); |
| 2105 | set_gdbarch_num_pseudo_regs (gdbarch, 12); |
| 2106 | set_gdbarch_pseudo_register_read (gdbarch, sh_pseudo_register_read); |
| 2107 | set_gdbarch_pseudo_register_write (gdbarch, sh_pseudo_register_write); |
| 2108 | set_gdbarch_store_return_value (gdbarch, sh3e_sh4_store_return_value); |
| 2109 | set_gdbarch_extract_return_value (gdbarch, |
| 2110 | sh3e_sh4_extract_return_value); |
| 2111 | set_gdbarch_push_dummy_call (gdbarch, sh_push_dummy_call_fpu); |
| 2112 | break; |
| 2113 | |
| 2114 | default: |
| 2115 | set_gdbarch_register_name (gdbarch, sh_generic_register_name); |
| 2116 | break; |
| 2117 | } |
| 2118 | |
| 2119 | /* Hook in ABI-specific overrides, if they have been registered. */ |
| 2120 | gdbarch_init_osabi (info, gdbarch); |
| 2121 | |
| 2122 | frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); |
| 2123 | frame_unwind_append_sniffer (gdbarch, sh_frame_sniffer); |
| 2124 | |
| 2125 | return gdbarch; |
| 2126 | } |
| 2127 | |
| 2128 | extern initialize_file_ftype _initialize_sh_tdep; /* -Wmissing-prototypes */ |
| 2129 | |
| 2130 | void |
| 2131 | _initialize_sh_tdep (void) |
| 2132 | { |
| 2133 | struct cmd_list_element *c; |
| 2134 | |
| 2135 | gdbarch_register (bfd_arch_sh, sh_gdbarch_init, NULL); |
| 2136 | |
| 2137 | add_com ("regs", class_vars, sh_show_regs_command, "Print all registers"); |
| 2138 | } |