Brad Bishop | d7bf8c1 | 2018-02-25 22:55:05 -0500 | [diff] [blame] | 1 | From 46d0d0ca718093486eeeedf1b44134e9e29b56f7 Mon Sep 17 00:00:00 2001 |
| 2 | From: Hongxu Jia <hongxu.jia@windriver.com> |
| 3 | Date: Wed, 16 Aug 2017 09:18:59 +0800 |
| 4 | Subject: [PATCH] mips backends |
| 5 | |
| 6 | Upstream-Status: Backport [from debian] |
| 7 | |
| 8 | Rebase to 0.170 |
| 9 | Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> |
| 10 | --- |
| 11 | backends/Makefile.am | 8 +- |
| 12 | backends/mips_init.c | 59 +++++++++ |
| 13 | backends/mips_regs.c | 104 ++++++++++++++++ |
| 14 | backends/mips_reloc.def | 79 ++++++++++++ |
| 15 | backends/mips_retval.c | 321 ++++++++++++++++++++++++++++++++++++++++++++++++ |
| 16 | backends/mips_symbol.c | 52 ++++++++ |
| 17 | libebl/eblopenbackend.c | 2 + |
| 18 | 7 files changed, 623 insertions(+), 2 deletions(-) |
| 19 | create mode 100644 backends/mips_init.c |
| 20 | create mode 100644 backends/mips_regs.c |
| 21 | create mode 100644 backends/mips_reloc.def |
| 22 | create mode 100644 backends/mips_retval.c |
| 23 | create mode 100644 backends/mips_symbol.c |
| 24 | |
| 25 | diff --git a/backends/Makefile.am b/backends/Makefile.am |
| 26 | index 7f1f5d4..91baf6e 100644 |
| 27 | --- a/backends/Makefile.am |
| 28 | +++ b/backends/Makefile.am |
| 29 | @@ -33,12 +33,12 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \ |
| 30 | |
| 31 | |
| 32 | modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \ |
| 33 | - tilegx m68k bpf parisc |
| 34 | + tilegx m68k bpf parisc mips |
| 35 | libebl_pic = libebl_i386_pic.a libebl_sh_pic.a libebl_x86_64_pic.a \ |
| 36 | libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \ |
| 37 | libebl_aarch64_pic.a libebl_sparc_pic.a libebl_ppc_pic.a \ |
| 38 | libebl_ppc64_pic.a libebl_s390_pic.a libebl_tilegx_pic.a \ |
| 39 | - libebl_m68k_pic.a libebl_bpf_pic.a libebl_parisc_pic.a |
| 40 | + libebl_m68k_pic.a libebl_bpf_pic.a libebl_parisc_pic.a libebl_mips_pic.a |
| 41 | noinst_LIBRARIES = $(libebl_pic) |
| 42 | noinst_DATA = $(libebl_pic:_pic.a=.so) |
| 43 | |
| 44 | @@ -128,6 +128,10 @@ parisc_SRCS = parisc_init.c parisc_symbol.c parisc_regs.c parisc_retval.c |
| 45 | libebl_parisc_pic_a_SOURCES = $(parisc_SRCS) |
| 46 | am_libebl_parisc_pic_a_OBJECTS = $(parisc_SRCS:.c=.os) |
| 47 | |
| 48 | +mips_SRCS = mips_init.c mips_symbol.c mips_regs.c mips_retval.c |
| 49 | +libebl_mips_pic_a_SOURCES = $(mips_SRCS) |
| 50 | +am_libebl_mips_pic_a_OBJECTS = $(mips_SRCS:.c=.os) |
| 51 | + |
| 52 | libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw) $(libeu) |
| 53 | @rm -f $(@:.so=.map) |
| 54 | $(AM_V_at)echo 'ELFUTILS_$(PACKAGE_VERSION) { global: $*_init; local: *; };' \ |
| 55 | diff --git a/backends/mips_init.c b/backends/mips_init.c |
| 56 | new file mode 100644 |
| 57 | index 0000000..975c04e |
| 58 | --- /dev/null |
| 59 | +++ b/backends/mips_init.c |
| 60 | @@ -0,0 +1,59 @@ |
| 61 | +/* Initialization of mips specific backend library. |
| 62 | + Copyright (C) 2006 Red Hat, Inc. |
| 63 | + This file is part of Red Hat elfutils. |
| 64 | + |
| 65 | + Red Hat elfutils is free software; you can redistribute it and/or modify |
| 66 | + it under the terms of the GNU General Public License as published by the |
| 67 | + Free Software Foundation; version 2 of the License. |
| 68 | + |
| 69 | + Red Hat elfutils is distributed in the hope that it will be useful, but |
| 70 | + WITHOUT ANY WARRANTY; without even the implied warranty of |
| 71 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 72 | + General Public License for more details. |
| 73 | + |
| 74 | + You should have received a copy of the GNU General Public License along |
| 75 | + with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 76 | + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 77 | + |
| 78 | + Red Hat elfutils is an included package of the Open Invention Network. |
| 79 | + An included package of the Open Invention Network is a package for which |
| 80 | + Open Invention Network licensees cross-license their patents. No patent |
| 81 | + license is granted, either expressly or impliedly, by designation as an |
| 82 | + included package. Should you wish to participate in the Open Invention |
| 83 | + Network licensing program, please visit www.openinventionnetwork.com |
| 84 | + <http://www.openinventionnetwork.com>. */ |
| 85 | + |
| 86 | +#ifdef HAVE_CONFIG_H |
| 87 | +# include <config.h> |
| 88 | +#endif |
| 89 | + |
| 90 | +#define BACKEND mips_ |
| 91 | +#define RELOC_PREFIX R_MIPS_ |
| 92 | +#include "libebl_CPU.h" |
| 93 | + |
| 94 | +/* This defines the common reloc hooks based on mips_reloc.def. */ |
| 95 | +#include "common-reloc.c" |
| 96 | + |
| 97 | +const char * |
| 98 | +mips_init (Elf *elf __attribute__ ((unused)), |
| 99 | + GElf_Half machine __attribute__ ((unused)), |
| 100 | + Ebl *eh, |
| 101 | + size_t ehlen) |
| 102 | +{ |
| 103 | + /* Check whether the Elf_BH object has a sufficent size. */ |
| 104 | + if (ehlen < sizeof (Ebl)) |
| 105 | + return NULL; |
| 106 | + |
| 107 | + /* We handle it. */ |
| 108 | + if (machine == EM_MIPS) |
| 109 | + eh->name = "MIPS R3000 big-endian"; |
| 110 | + else if (machine == EM_MIPS_RS3_LE) |
| 111 | + eh->name = "MIPS R3000 little-endian"; |
| 112 | + |
| 113 | + mips_init_reloc (eh); |
| 114 | + HOOK (eh, reloc_simple_type); |
| 115 | + HOOK (eh, return_value_location); |
| 116 | + HOOK (eh, register_info); |
| 117 | + |
| 118 | + return MODVERSION; |
| 119 | +} |
| 120 | diff --git a/backends/mips_regs.c b/backends/mips_regs.c |
| 121 | new file mode 100644 |
| 122 | index 0000000..44f86cb |
| 123 | --- /dev/null |
| 124 | +++ b/backends/mips_regs.c |
| 125 | @@ -0,0 +1,104 @@ |
| 126 | +/* Register names and numbers for MIPS DWARF. |
| 127 | + Copyright (C) 2006 Red Hat, Inc. |
| 128 | + This file is part of Red Hat elfutils. |
| 129 | + |
| 130 | + Red Hat elfutils is free software; you can redistribute it and/or modify |
| 131 | + it under the terms of the GNU General Public License as published by the |
| 132 | + Free Software Foundation; version 2 of the License. |
| 133 | + |
| 134 | + Red Hat elfutils is distributed in the hope that it will be useful, but |
| 135 | + WITHOUT ANY WARRANTY; without even the implied warranty of |
| 136 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 137 | + General Public License for more details. |
| 138 | + |
| 139 | + You should have received a copy of the GNU General Public License along |
| 140 | + with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 141 | + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 142 | + |
| 143 | + Red Hat elfutils is an included package of the Open Invention Network. |
| 144 | + An included package of the Open Invention Network is a package for which |
| 145 | + Open Invention Network licensees cross-license their patents. No patent |
| 146 | + license is granted, either expressly or impliedly, by designation as an |
| 147 | + included package. Should you wish to participate in the Open Invention |
| 148 | + Network licensing program, please visit www.openinventionnetwork.com |
| 149 | + <http://www.openinventionnetwork.com>. */ |
| 150 | + |
| 151 | +#ifdef HAVE_CONFIG_H |
| 152 | +# include <config.h> |
| 153 | +#endif |
| 154 | + |
| 155 | +#include <string.h> |
| 156 | +#include <dwarf.h> |
| 157 | + |
| 158 | +#define BACKEND mips_ |
| 159 | +#include "libebl_CPU.h" |
| 160 | + |
| 161 | +ssize_t |
| 162 | +mips_register_info (Ebl *ebl __attribute__((unused)), |
| 163 | + int regno, char *name, size_t namelen, |
| 164 | + const char **prefix, const char **setname, |
| 165 | + int *bits, int *type) |
| 166 | +{ |
| 167 | + if (name == NULL) |
| 168 | + return 66; |
| 169 | + |
| 170 | + if (regno < 0 || regno > 65 || namelen < 4) |
| 171 | + return -1; |
| 172 | + |
| 173 | + *prefix = "$"; |
| 174 | + |
| 175 | + if (regno < 32) |
| 176 | + { |
| 177 | + *setname = "integer"; |
| 178 | + *type = DW_ATE_signed; |
| 179 | + *bits = 32; |
| 180 | + if (regno < 32 + 10) |
| 181 | + { |
| 182 | + name[0] = regno + '0'; |
| 183 | + namelen = 1; |
| 184 | + } |
| 185 | + else |
| 186 | + { |
| 187 | + name[0] = (regno / 10) + '0'; |
| 188 | + name[1] = (regno % 10) + '0'; |
| 189 | + namelen = 2; |
| 190 | + } |
| 191 | + } |
| 192 | + else if (regno < 64) |
| 193 | + { |
| 194 | + *setname = "FPU"; |
| 195 | + *type = DW_ATE_float; |
| 196 | + *bits = 32; |
| 197 | + name[0] = 'f'; |
| 198 | + if (regno < 32 + 10) |
| 199 | + { |
| 200 | + name[1] = (regno - 32) + '0'; |
| 201 | + namelen = 2; |
| 202 | + } |
| 203 | + else |
| 204 | + { |
| 205 | + name[1] = (regno - 32) / 10 + '0'; |
| 206 | + name[2] = (regno - 32) % 10 + '0'; |
| 207 | + namelen = 3; |
| 208 | + } |
| 209 | + } |
| 210 | + else if (regno == 64) |
| 211 | + { |
| 212 | + *type = DW_ATE_signed; |
| 213 | + *bits = 32; |
| 214 | + name[0] = 'h'; |
| 215 | + name[1] = 'i'; |
| 216 | + namelen = 2; |
| 217 | + } |
| 218 | + else |
| 219 | + { |
| 220 | + *type = DW_ATE_signed; |
| 221 | + *bits = 32; |
| 222 | + name[0] = 'l'; |
| 223 | + name[1] = 'o'; |
| 224 | + namelen = 2; |
| 225 | + } |
| 226 | + |
| 227 | + name[namelen++] = '\0'; |
| 228 | + return namelen; |
| 229 | +} |
| 230 | diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def |
| 231 | new file mode 100644 |
| 232 | index 0000000..4579970 |
| 233 | --- /dev/null |
| 234 | +++ b/backends/mips_reloc.def |
| 235 | @@ -0,0 +1,79 @@ |
| 236 | +/* List the relocation types for mips. -*- C -*- |
| 237 | + Copyright (C) 2006 Red Hat, Inc. |
| 238 | + This file is part of Red Hat elfutils. |
| 239 | + |
| 240 | + Red Hat elfutils is free software; you can redistribute it and/or modify |
| 241 | + it under the terms of the GNU General Public License as published by the |
| 242 | + Free Software Foundation; version 2 of the License. |
| 243 | + |
| 244 | + Red Hat elfutils is distributed in the hope that it will be useful, but |
| 245 | + WITHOUT ANY WARRANTY; without even the implied warranty of |
| 246 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 247 | + General Public License for more details. |
| 248 | + |
| 249 | + You should have received a copy of the GNU General Public License along |
| 250 | + with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 251 | + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 252 | + |
| 253 | + Red Hat elfutils is an included package of the Open Invention Network. |
| 254 | + An included package of the Open Invention Network is a package for which |
| 255 | + Open Invention Network licensees cross-license their patents. No patent |
| 256 | + license is granted, either expressly or impliedly, by designation as an |
| 257 | + included package. Should you wish to participate in the Open Invention |
| 258 | + Network licensing program, please visit www.openinventionnetwork.com |
| 259 | + <http://www.openinventionnetwork.com>. */ |
| 260 | + |
| 261 | +/* NAME, REL|EXEC|DYN */ |
| 262 | + |
| 263 | +RELOC_TYPE (NONE, 0) |
| 264 | +RELOC_TYPE (16, 0) |
| 265 | +RELOC_TYPE (32, 0) |
| 266 | +RELOC_TYPE (REL32, 0) |
| 267 | +RELOC_TYPE (26, 0) |
| 268 | +RELOC_TYPE (HI16, 0) |
| 269 | +RELOC_TYPE (LO16, 0) |
| 270 | +RELOC_TYPE (GPREL16, 0) |
| 271 | +RELOC_TYPE (LITERAL, 0) |
| 272 | +RELOC_TYPE (GOT16, 0) |
| 273 | +RELOC_TYPE (PC16, 0) |
| 274 | +RELOC_TYPE (CALL16, 0) |
| 275 | +RELOC_TYPE (GPREL32, 0) |
| 276 | + |
| 277 | +RELOC_TYPE (SHIFT5, 0) |
| 278 | +RELOC_TYPE (SHIFT6, 0) |
| 279 | +RELOC_TYPE (64, 0) |
| 280 | +RELOC_TYPE (GOT_DISP, 0) |
| 281 | +RELOC_TYPE (GOT_PAGE, 0) |
| 282 | +RELOC_TYPE (GOT_OFST, 0) |
| 283 | +RELOC_TYPE (GOT_HI16, 0) |
| 284 | +RELOC_TYPE (GOT_LO16, 0) |
| 285 | +RELOC_TYPE (SUB, 0) |
| 286 | +RELOC_TYPE (INSERT_A, 0) |
| 287 | +RELOC_TYPE (INSERT_B, 0) |
| 288 | +RELOC_TYPE (DELETE, 0) |
| 289 | +RELOC_TYPE (HIGHER, 0) |
| 290 | +RELOC_TYPE (HIGHEST, 0) |
| 291 | +RELOC_TYPE (CALL_HI16, 0) |
| 292 | +RELOC_TYPE (CALL_LO16, 0) |
| 293 | +RELOC_TYPE (SCN_DISP, 0) |
| 294 | +RELOC_TYPE (REL16, 0) |
| 295 | +RELOC_TYPE (ADD_IMMEDIATE, 0) |
| 296 | +RELOC_TYPE (PJUMP, 0) |
| 297 | +RELOC_TYPE (RELGOT, 0) |
| 298 | +RELOC_TYPE (JALR, 0) |
| 299 | +RELOC_TYPE (TLS_DTPMOD32, 0) |
| 300 | +RELOC_TYPE (TLS_DTPREL32, 0) |
| 301 | +RELOC_TYPE (TLS_DTPMOD64, 0) |
| 302 | +RELOC_TYPE (TLS_DTPREL64, 0) |
| 303 | +RELOC_TYPE (TLS_GD, 0) |
| 304 | +RELOC_TYPE (TLS_LDM, 0) |
| 305 | +RELOC_TYPE (TLS_DTPREL_HI16, 0) |
| 306 | +RELOC_TYPE (TLS_DTPREL_LO16, 0) |
| 307 | +RELOC_TYPE (TLS_GOTTPREL, 0) |
| 308 | +RELOC_TYPE (TLS_TPREL32, 0) |
| 309 | +RELOC_TYPE (TLS_TPREL64, 0) |
| 310 | +RELOC_TYPE (TLS_TPREL_HI16, 0) |
| 311 | +RELOC_TYPE (TLS_TPREL_LO16, 0) |
| 312 | + |
| 313 | +#define NO_COPY_RELOC 1 |
| 314 | +#define NO_RELATIVE_RELOC 1 |
| 315 | diff --git a/backends/mips_retval.c b/backends/mips_retval.c |
| 316 | new file mode 100644 |
| 317 | index 0000000..656cd1f |
| 318 | --- /dev/null |
| 319 | +++ b/backends/mips_retval.c |
| 320 | @@ -0,0 +1,321 @@ |
| 321 | +/* Function return value location for Linux/mips ABI. |
| 322 | + Copyright (C) 2005 Red Hat, Inc. |
| 323 | + This file is part of Red Hat elfutils. |
| 324 | + |
| 325 | + Red Hat elfutils is free software; you can redistribute it and/or modify |
| 326 | + it under the terms of the GNU General Public License as published by the |
| 327 | + Free Software Foundation; version 2 of the License. |
| 328 | + |
| 329 | + Red Hat elfutils is distributed in the hope that it will be useful, but |
| 330 | + WITHOUT ANY WARRANTY; without even the implied warranty of |
| 331 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 332 | + General Public License for more details. |
| 333 | + |
| 334 | + You should have received a copy of the GNU General Public License along |
| 335 | + with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 336 | + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 337 | + |
| 338 | + Red Hat elfutils is an included package of the Open Invention Network. |
| 339 | + An included package of the Open Invention Network is a package for which |
| 340 | + Open Invention Network licensees cross-license their patents. No patent |
| 341 | + license is granted, either expressly or impliedly, by designation as an |
| 342 | + included package. Should you wish to participate in the Open Invention |
| 343 | + Network licensing program, please visit www.openinventionnetwork.com |
| 344 | + <http://www.openinventionnetwork.com>. */ |
| 345 | + |
| 346 | +#ifdef HAVE_CONFIG_H |
| 347 | +# include <config.h> |
| 348 | +#endif |
| 349 | + |
| 350 | +#include <string.h> |
| 351 | +#include <assert.h> |
| 352 | +#include <dwarf.h> |
| 353 | +#include <elf.h> |
| 354 | + |
| 355 | +#include "../libebl/libeblP.h" |
| 356 | +#include "../libdw/libdwP.h" |
| 357 | + |
| 358 | +#define BACKEND mips_ |
| 359 | +#include "libebl_CPU.h" |
| 360 | + |
| 361 | +/* The ABI of the file. Also see EF_MIPS_ABI2 above. */ |
| 362 | +#define EF_MIPS_ABI 0x0000F000 |
| 363 | + |
| 364 | +/* The original o32 abi. */ |
| 365 | +#define E_MIPS_ABI_O32 0x00001000 |
| 366 | + |
| 367 | +/* O32 extended to work on 64 bit architectures */ |
| 368 | +#define E_MIPS_ABI_O64 0x00002000 |
| 369 | + |
| 370 | +/* EABI in 32 bit mode */ |
| 371 | +#define E_MIPS_ABI_EABI32 0x00003000 |
| 372 | + |
| 373 | +/* EABI in 64 bit mode */ |
| 374 | +#define E_MIPS_ABI_EABI64 0x00004000 |
| 375 | + |
| 376 | +/* All the possible MIPS ABIs. */ |
| 377 | +enum mips_abi |
| 378 | + { |
| 379 | + MIPS_ABI_UNKNOWN = 0, |
| 380 | + MIPS_ABI_N32, |
| 381 | + MIPS_ABI_O32, |
| 382 | + MIPS_ABI_N64, |
| 383 | + MIPS_ABI_O64, |
| 384 | + MIPS_ABI_EABI32, |
| 385 | + MIPS_ABI_EABI64, |
| 386 | + MIPS_ABI_LAST |
| 387 | + }; |
| 388 | + |
| 389 | +/* Find the mips ABI of the current file */ |
| 390 | +enum mips_abi find_mips_abi(Elf *elf) |
| 391 | +{ |
| 392 | + GElf_Ehdr ehdr_mem; |
| 393 | + GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem); |
| 394 | + |
| 395 | + if (ehdr == NULL) |
| 396 | + return MIPS_ABI_LAST; |
| 397 | + |
| 398 | + GElf_Word elf_flags = ehdr->e_flags; |
| 399 | + |
| 400 | + /* Check elf_flags to see if it specifies the ABI being used. */ |
| 401 | + switch ((elf_flags & EF_MIPS_ABI)) |
| 402 | + { |
| 403 | + case E_MIPS_ABI_O32: |
| 404 | + return MIPS_ABI_O32; |
| 405 | + case E_MIPS_ABI_O64: |
| 406 | + return MIPS_ABI_O64; |
| 407 | + case E_MIPS_ABI_EABI32: |
| 408 | + return MIPS_ABI_EABI32; |
| 409 | + case E_MIPS_ABI_EABI64: |
| 410 | + return MIPS_ABI_EABI64; |
| 411 | + default: |
| 412 | + if ((elf_flags & EF_MIPS_ABI2)) |
| 413 | + return MIPS_ABI_N32; |
| 414 | + } |
| 415 | + |
| 416 | + /* GCC creates a pseudo-section whose name describes the ABI. */ |
| 417 | + size_t shstrndx; |
| 418 | + if (elf_getshdrstrndx (elf, &shstrndx) < 0) |
| 419 | + return MIPS_ABI_LAST; |
| 420 | + |
| 421 | + const char *name; |
| 422 | + Elf_Scn *scn = NULL; |
| 423 | + while ((scn = elf_nextscn (elf, scn)) != NULL) |
| 424 | + { |
| 425 | + GElf_Shdr shdr_mem; |
| 426 | + GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); |
| 427 | + if (shdr == NULL) |
| 428 | + return MIPS_ABI_LAST; |
| 429 | + |
| 430 | + name = elf_strptr (elf, shstrndx, shdr->sh_name) ?: ""; |
| 431 | + if (strncmp (name, ".mdebug.", 8) != 0) |
| 432 | + continue; |
| 433 | + |
| 434 | + if (strcmp (name, ".mdebug.abi32") == 0) |
| 435 | + return MIPS_ABI_O32; |
| 436 | + else if (strcmp (name, ".mdebug.abiN32") == 0) |
| 437 | + return MIPS_ABI_N32; |
| 438 | + else if (strcmp (name, ".mdebug.abi64") == 0) |
| 439 | + return MIPS_ABI_N64; |
| 440 | + else if (strcmp (name, ".mdebug.abiO64") == 0) |
| 441 | + return MIPS_ABI_O64; |
| 442 | + else if (strcmp (name, ".mdebug.eabi32") == 0) |
| 443 | + return MIPS_ABI_EABI32; |
| 444 | + else if (strcmp (name, ".mdebug.eabi64") == 0) |
| 445 | + return MIPS_ABI_EABI64; |
| 446 | + else |
| 447 | + return MIPS_ABI_UNKNOWN; |
| 448 | + } |
| 449 | + |
| 450 | + return MIPS_ABI_UNKNOWN; |
| 451 | +} |
| 452 | + |
| 453 | +unsigned int |
| 454 | +mips_abi_regsize (enum mips_abi abi) |
| 455 | +{ |
| 456 | + switch (abi) |
| 457 | + { |
| 458 | + case MIPS_ABI_EABI32: |
| 459 | + case MIPS_ABI_O32: |
| 460 | + return 4; |
| 461 | + case MIPS_ABI_N32: |
| 462 | + case MIPS_ABI_N64: |
| 463 | + case MIPS_ABI_O64: |
| 464 | + case MIPS_ABI_EABI64: |
| 465 | + return 8; |
| 466 | + case MIPS_ABI_UNKNOWN: |
| 467 | + case MIPS_ABI_LAST: |
| 468 | + default: |
| 469 | + return 0; |
| 470 | + } |
| 471 | +} |
| 472 | + |
| 473 | + |
| 474 | +/* $v0 or pair $v0, $v1 */ |
| 475 | +static const Dwarf_Op loc_intreg_o32[] = |
| 476 | + { |
| 477 | + { .atom = DW_OP_reg2 }, { .atom = DW_OP_piece, .number = 4 }, |
| 478 | + { .atom = DW_OP_reg3 }, { .atom = DW_OP_piece, .number = 4 }, |
| 479 | + }; |
| 480 | + |
| 481 | +static const Dwarf_Op loc_intreg[] = |
| 482 | + { |
| 483 | + { .atom = DW_OP_reg2 }, { .atom = DW_OP_piece, .number = 8 }, |
| 484 | + { .atom = DW_OP_reg3 }, { .atom = DW_OP_piece, .number = 8 }, |
| 485 | + }; |
| 486 | +#define nloc_intreg 1 |
| 487 | +#define nloc_intregpair 4 |
| 488 | + |
| 489 | +/* $f0 (float), or pair $f0, $f1 (double). |
| 490 | + * f2/f3 are used for COMPLEX (= 2 doubles) returns in Fortran */ |
| 491 | +static const Dwarf_Op loc_fpreg_o32[] = |
| 492 | + { |
| 493 | + { .atom = DW_OP_regx, .number = 32 }, { .atom = DW_OP_piece, .number = 4 }, |
| 494 | + { .atom = DW_OP_regx, .number = 33 }, { .atom = DW_OP_piece, .number = 4 }, |
| 495 | + { .atom = DW_OP_regx, .number = 34 }, { .atom = DW_OP_piece, .number = 4 }, |
| 496 | + { .atom = DW_OP_regx, .number = 35 }, { .atom = DW_OP_piece, .number = 4 }, |
| 497 | + }; |
| 498 | + |
| 499 | +/* $f0, or pair $f0, $f2. */ |
| 500 | +static const Dwarf_Op loc_fpreg[] = |
| 501 | + { |
| 502 | + { .atom = DW_OP_regx, .number = 32 }, { .atom = DW_OP_piece, .number = 8 }, |
| 503 | + { .atom = DW_OP_regx, .number = 34 }, { .atom = DW_OP_piece, .number = 8 }, |
| 504 | + }; |
| 505 | +#define nloc_fpreg 1 |
| 506 | +#define nloc_fpregpair 4 |
| 507 | +#define nloc_fpregquad 8 |
| 508 | + |
| 509 | +/* The return value is a structure and is actually stored in stack space |
| 510 | + passed in a hidden argument by the caller. But, the compiler |
| 511 | + helpfully returns the address of that space in $v0. */ |
| 512 | +static const Dwarf_Op loc_aggregate[] = |
| 513 | + { |
| 514 | + { .atom = DW_OP_breg2, .number = 0 } |
| 515 | + }; |
| 516 | +#define nloc_aggregate 1 |
| 517 | + |
| 518 | +int |
| 519 | +mips_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp) |
| 520 | +{ |
| 521 | + /* First find the ABI used by the elf object */ |
| 522 | + enum mips_abi abi = find_mips_abi(functypedie->cu->dbg->elf); |
| 523 | + |
| 524 | + /* Something went seriously wrong while trying to figure out the ABI */ |
| 525 | + if (abi == MIPS_ABI_LAST) |
| 526 | + return -1; |
| 527 | + |
| 528 | + /* We couldn't identify the ABI, but the file seems valid */ |
| 529 | + if (abi == MIPS_ABI_UNKNOWN) |
| 530 | + return -2; |
| 531 | + |
| 532 | + /* Can't handle EABI variants */ |
| 533 | + if ((abi == MIPS_ABI_EABI32) || (abi == MIPS_ABI_EABI64)) |
| 534 | + return -2; |
| 535 | + |
| 536 | + unsigned int regsize = mips_abi_regsize (abi); |
| 537 | + if (!regsize) |
| 538 | + return -2; |
| 539 | + |
| 540 | + /* Start with the function's type, and get the DW_AT_type attribute, |
| 541 | + which is the type of the return value. */ |
| 542 | + |
| 543 | + Dwarf_Attribute attr_mem; |
| 544 | + Dwarf_Attribute *attr = dwarf_attr_integrate (functypedie, DW_AT_type, &attr_mem); |
| 545 | + if (attr == NULL) |
| 546 | + /* The function has no return value, like a `void' function in C. */ |
| 547 | + return 0; |
| 548 | + |
| 549 | + Dwarf_Die die_mem; |
| 550 | + Dwarf_Die *typedie = dwarf_formref_die (attr, &die_mem); |
| 551 | + int tag = dwarf_tag (typedie); |
| 552 | + |
| 553 | + /* Follow typedefs and qualifiers to get to the actual type. */ |
| 554 | + while (tag == DW_TAG_typedef |
| 555 | + || tag == DW_TAG_const_type || tag == DW_TAG_volatile_type |
| 556 | + || tag == DW_TAG_restrict_type) |
| 557 | + { |
| 558 | + attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); |
| 559 | + typedie = dwarf_formref_die (attr, &die_mem); |
| 560 | + tag = dwarf_tag (typedie); |
| 561 | + } |
| 562 | + |
| 563 | + switch (tag) |
| 564 | + { |
| 565 | + case -1: |
| 566 | + return -1; |
| 567 | + |
| 568 | + case DW_TAG_subrange_type: |
| 569 | + if (! dwarf_hasattr_integrate (typedie, DW_AT_byte_size)) |
| 570 | + { |
| 571 | + attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem); |
| 572 | + typedie = dwarf_formref_die (attr, &die_mem); |
| 573 | + tag = dwarf_tag (typedie); |
| 574 | + } |
| 575 | + /* Fall through. */ |
| 576 | + |
| 577 | + case DW_TAG_base_type: |
| 578 | + case DW_TAG_enumeration_type: |
| 579 | + case DW_TAG_pointer_type: |
| 580 | + case DW_TAG_ptr_to_member_type: |
| 581 | + { |
| 582 | + Dwarf_Word size; |
| 583 | + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_byte_size, |
| 584 | + &attr_mem), &size) != 0) |
| 585 | + { |
| 586 | + if (tag == DW_TAG_pointer_type || tag == DW_TAG_ptr_to_member_type) |
| 587 | + size = regsize; |
| 588 | + else |
| 589 | + return -1; |
| 590 | + } |
| 591 | + if (tag == DW_TAG_base_type) |
| 592 | + { |
| 593 | + Dwarf_Word encoding; |
| 594 | + if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_encoding, |
| 595 | + &attr_mem), &encoding) != 0) |
| 596 | + return -1; |
| 597 | + |
| 598 | +#define ABI_LOC(loc, regsize) ((regsize) == 4 ? (loc ## _o32) : (loc)) |
| 599 | + |
| 600 | + if (encoding == DW_ATE_float) |
| 601 | + { |
| 602 | + *locp = ABI_LOC(loc_fpreg, regsize); |
| 603 | + if (size <= regsize) |
| 604 | + return nloc_fpreg; |
| 605 | + |
| 606 | + if (size <= 2*regsize) |
| 607 | + return nloc_fpregpair; |
| 608 | + |
| 609 | + if (size <= 4*regsize && abi == MIPS_ABI_O32) |
| 610 | + return nloc_fpregquad; |
| 611 | + |
| 612 | + goto aggregate; |
| 613 | + } |
| 614 | + } |
| 615 | + *locp = ABI_LOC(loc_intreg, regsize); |
| 616 | + if (size <= regsize) |
| 617 | + return nloc_intreg; |
| 618 | + if (size <= 2*regsize) |
| 619 | + return nloc_intregpair; |
| 620 | + |
| 621 | + /* Else fall through. Shouldn't happen though (at least with gcc) */ |
| 622 | + } |
| 623 | + |
| 624 | + case DW_TAG_structure_type: |
| 625 | + case DW_TAG_class_type: |
| 626 | + case DW_TAG_union_type: |
| 627 | + case DW_TAG_array_type: |
| 628 | + aggregate: |
| 629 | + /* XXX TODO: Can't handle structure return with other ABI's yet :-/ */ |
| 630 | + if ((abi != MIPS_ABI_O32) && (abi != MIPS_ABI_O64)) |
| 631 | + return -2; |
| 632 | + |
| 633 | + *locp = loc_aggregate; |
| 634 | + return nloc_aggregate; |
| 635 | + } |
| 636 | + |
| 637 | + /* XXX We don't have a good way to return specific errors from ebl calls. |
| 638 | + This value means we do not understand the type, but it is well-formed |
| 639 | + DWARF and might be valid. */ |
| 640 | + return -2; |
| 641 | +} |
| 642 | diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c |
| 643 | new file mode 100644 |
| 644 | index 0000000..ba465fe |
| 645 | --- /dev/null |
| 646 | +++ b/backends/mips_symbol.c |
| 647 | @@ -0,0 +1,52 @@ |
| 648 | +/* MIPS specific symbolic name handling. |
| 649 | + Copyright (C) 2002, 2003, 2005 Red Hat, Inc. |
| 650 | + This file is part of Red Hat elfutils. |
| 651 | + Written by Jakub Jelinek <jakub@redhat.com>, 2002. |
| 652 | + |
| 653 | + Red Hat elfutils is free software; you can redistribute it and/or modify |
| 654 | + it under the terms of the GNU General Public License as published by the |
| 655 | + Free Software Foundation; version 2 of the License. |
| 656 | + |
| 657 | + Red Hat elfutils is distributed in the hope that it will be useful, but |
| 658 | + WITHOUT ANY WARRANTY; without even the implied warranty of |
| 659 | + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 660 | + General Public License for more details. |
| 661 | + |
| 662 | + You should have received a copy of the GNU General Public License along |
| 663 | + with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 664 | + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 665 | + |
| 666 | + Red Hat elfutils is an included package of the Open Invention Network. |
| 667 | + An included package of the Open Invention Network is a package for which |
| 668 | + Open Invention Network licensees cross-license their patents. No patent |
| 669 | + license is granted, either expressly or impliedly, by designation as an |
| 670 | + included package. Should you wish to participate in the Open Invention |
| 671 | + Network licensing program, please visit www.openinventionnetwork.com |
| 672 | + <http://www.openinventionnetwork.com>. */ |
| 673 | + |
| 674 | +#ifdef HAVE_CONFIG_H |
| 675 | +# include <config.h> |
| 676 | +#endif |
| 677 | + |
| 678 | +#include <elf.h> |
| 679 | +#include <stddef.h> |
| 680 | + |
| 681 | +#define BACKEND mips_ |
| 682 | +#include "libebl_CPU.h" |
| 683 | + |
| 684 | +/* Check for the simple reloc types. */ |
| 685 | +Elf_Type |
| 686 | +mips_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) |
| 687 | +{ |
| 688 | + switch (type) |
| 689 | + { |
| 690 | + case R_MIPS_16: |
| 691 | + return ELF_T_HALF; |
| 692 | + case R_MIPS_32: |
| 693 | + return ELF_T_WORD; |
| 694 | + case R_MIPS_64: |
| 695 | + return ELF_T_XWORD; |
| 696 | + default: |
| 697 | + return ELF_T_NUM; |
| 698 | + } |
| 699 | +} |
| 700 | diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c |
| 701 | index 1f81477..5371396 100644 |
| 702 | --- a/libebl/eblopenbackend.c |
| 703 | +++ b/libebl/eblopenbackend.c |
| 704 | @@ -72,6 +72,8 @@ static const struct |
| 705 | { "sparc", "elf_sparc", "sparc", 5, EM_SPARC, 0, 0 }, |
| 706 | { "sparc", "elf_sparcv8plus", "sparc", 5, EM_SPARC32PLUS, 0, 0 }, |
| 707 | { "s390", "ebl_s390", "s390", 4, EM_S390, 0, 0 }, |
| 708 | + { "mips", "elf_mips", "mips", 4, EM_MIPS, 0, 0 }, |
| 709 | + { "mips", "elf_mipsel", "mipsel", 4, EM_MIPS_RS3_LE, 0, 0 }, |
| 710 | |
| 711 | { "m32", "elf_m32", "m32", 3, EM_M32, 0, 0 }, |
| 712 | { "m68k", "elf_m68k", "m68k", 4, EM_68K, ELFCLASS32, ELFDATA2MSB }, |
| 713 | -- |
| 714 | 1.8.3.1 |
| 715 | |