freebsd.h revision 60731
168349Sobrien/* Base configuration file for all FreeBSD targets. 268349Sobrien Copyright (C) 1999, 2000 Free Software Foundation, Inc. 368349Sobrien 468349SobrienThis file is part of GNU CC. 568349Sobrien 668349SobrienGNU CC is free software; you can redistribute it and/or modify 768349Sobrienit under the terms of the GNU General Public License as published by 868349Sobrienthe Free Software Foundation; either version 2, or (at your option) 968349Sobrienany later version. 1068349Sobrien 1168349SobrienGNU CC is distributed in the hope that it will be useful, 1268349Sobrienbut WITHOUT ANY WARRANTY; without even the implied warranty of 1368349SobrienMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1468349SobrienGNU General Public License for more details. 1568349Sobrien 1668349SobrienYou should have received a copy of the GNU General Public License 1768349Sobrienalong with GNU CC; see the file COPYING. If not, write to 1868349Sobrienthe Free Software Foundation, 59 Temple Place - Suite 330, 1968349SobrienBoston, MA 02111-1307, USA. */ 2068349Sobrien 2168349Sobrien/* Common FreeBSD configuration. 2268349Sobrien All FreeBSD architectures should include this file, which will specify 2368349Sobrien their commonalities. 2468349Sobrien Adapted from /usr/src/contrib/gcc/config/i386/freebsd.h, 2568349Sobrien /usr/src/contrib/gcc/config/svr4.h & 2668349Sobrien egcs/gcc/config/i386/freebsd-elf.h version by David O'Brien */ 2768349Sobrien 28110949Sobrien/* $FreeBSD: head/contrib/gcc/config/freebsd.h 60731 2000-05-20 10:14:43Z obrien $ */ 2968349Sobrien 30103373Sobrien 31103373Sobrien/* Cpp, assembler, linker, library, and startfile spec's. */ 32103373Sobrien 33103373Sobrien/* This defines which switch letters take arguments. On FreeBSD, most of 3468349Sobrien the normal cases (defined in gcc.c) apply, and we also have -h* and 35110949Sobrien -z* options (for the linker) (comming from svr4). 36110949Sobrien We also have -R (alias --rpath), no -z, --soname (-h), --assert etc. */ 37110949Sobrien 38110949Sobrien#define FBSD_SWITCH_TAKES_ARG(CHAR) \ 39110949Sobrien (DEFAULT_SWITCH_TAKES_ARG (CHAR) \ 40110949Sobrien || (CHAR) == 'h' \ 41110949Sobrien || (CHAR) == 'z' /* ignored by ld */ \ 42110949Sobrien || (CHAR) == 'R') 43110949Sobrien 44110949Sobrien#undef SWITCH_TAKES_ARG 45110949Sobrien#define SWITCH_TAKES_ARG(CHAR) (FBSD_SWITCH_TAKES_ARG(CHAR)) 46110949Sobrien 47110949Sobrien/* This defines which multi-letter switches take arguments. */ 48110949Sobrien 49110949Sobrien#define FBSD_WORD_SWITCH_TAKES_ARG(STR) \ 50110949Sobrien (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \ 51110949Sobrien || !strcmp ((STR), "rpath") || !strcmp ((STR), "rpath-link") \ 52110949Sobrien || !strcmp ((STR), "soname") || !strcmp ((STR), "defsym") \ 53110949Sobrien || !strcmp ((STR), "assert") || !strcmp ((STR), "dynamic-linker")) 54110949Sobrien 55110949Sobrien#undef WORD_SWITCH_TAKES_ARG 56110949Sobrien#define WORD_SWITCH_TAKES_ARG(STR) (FBSD_WORD_SWITCH_TAKES_ARG(STR)) 57110949Sobrien 58110949Sobrien/* Place spaces around this string. We depend on string splicing to produce 59110949Sobrien the final CPP_PREDEFINES value. */ 60110949Sobrien#define FBSD_CPP_PREDEFINES " -Dunix -D__FreeBSD__=5 -D__FreeBSD_cc_version=500001 -Asystem(unix) -Asystem(FreeBSD) " 61110949Sobrien 62110949Sobrien#define FBSD_CPP_SPEC "\ 63110949Sobrien %(cpp_cpu) \ 64110949Sobrien %{!maout: -D__ELF__} \ 65110949Sobrien %{munderscores: -D__UNDERSCORES__} \ 66110949Sobrien %{maout: %{!mno-underscores: -D__UNDERSCORES__}} \ 67110949Sobrien %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} \ 68110949Sobrien %{posix:-D_POSIX_SOURCE}" 69110949Sobrien 70110949Sobrien#undef CPP_SPEC 71110949Sobrien#define CPP_SPEC FBSD_CPP_SPEC 72110949Sobrien 73110949Sobrien/* Provide a LIB_SPEC appropriate for FreeBSD. Just select the appropriate 74110949Sobrien libc, depending on whether we're doing profiling. 75110949Sobrien (like the default, except no -lg, and no -p). */ 76110949Sobrien#undef LIB_SPEC 77110949Sobrien#define LIB_SPEC "\ 78110949Sobrien %{!shared: \ 79110949Sobrien %{!pg: \ 80110949Sobrien %{!pthread:%{!kthread:-lc}%{kthread:-lpthread -lc}} \ 81110949Sobrien %{pthread:-lc_r}} \ 82110949Sobrien %{pg: \ 83110949Sobrien %{!pthread:%{!kthread:-lc_p}%{kthread:-lpthread_p -lc_p}} \ 84110949Sobrien %{pthread:-lc_r_p}}}" 85110949Sobrien 86110949Sobrien 87110949Sobrien/************************[ Target stuff ]***********************************/ 88110949Sobrien 89110949Sobrien/* All FreeBSD Architectures support the ELF object file format. */ 90110949Sobrien#undef OBJECT_FORMAT_ELF 91110949Sobrien#define OBJECT_FORMAT_ELF 92110949Sobrien 93110949Sobrien/* Don't assume anything about the header files. */ 94110949Sobrien#undef NO_IMPLICIT_EXTERN_C 95110949Sobrien#define NO_IMPLICIT_EXTERN_C 96110949Sobrien 97110949Sobrien/* Implicit library calls should use memcpy, not bcopy, etc. */ 98110949Sobrien#undef TARGET_MEM_FUNCTIONS 99110949Sobrien#define TARGET_MEM_FUNCTIONS 100110949Sobrien 101110949Sobrien/* Allow #sccs in preprocessor. */ 102110949Sobrien#undef SCCS_DIRECTIVE 103110949Sobrien#define SCCS_DIRECTIVE 104110949Sobrien 105110949Sobrien/* Tell libgcc2.c that FreeBSD targets support atexit(3). */ 106110949Sobrien#undef HAVE_ATEXIT 107110949Sobrien#define HAVE_ATEXIT 108110949Sobrien 109110949Sobrien/* Code generation parameters. */ 110110949Sobrien 111110949Sobrien/* Don't default to pcc-struct-return, because gcc is the only compiler, and 112110949Sobrien we want to retain compatibility with older gcc versions 113110949Sobrien (even though the svr4 ABI for the i386 says that records and unions are 114110949Sobrien returned in memory). */ 115110949Sobrien#undef DEFAULT_PCC_STRUCT_RETURN 116110949Sobrien#define DEFAULT_PCC_STRUCT_RETURN 0 117110949Sobrien 118110949Sobrien/* Writing `int' for a bitfield forces int alignment for the structure. */ 119110949Sobrien/* XXX: ok for Alpha?? */ 120110949Sobrien#undef PCC_BITFIELD_TYPE_MATTERS 121110949Sobrien#define PCC_BITFIELD_TYPE_MATTERS 1 122110949Sobrien 123110949Sobrien/* Use periods rather than dollar signs in special g++ assembler names. 124110949Sobrien This ensures the configuration knows our system correctly so we can link 125110949Sobrien with libraries compiled with the native cc. */ 126110949Sobrien#undef NO_DOLLAR_IN_LABEL 127110949Sobrien 12868349Sobrien/* The prefix to add to user-visible assembler symbols. 12968349Sobrien For System V Release 4 & ELF the convention is *not* to prepend a leading 13068349Sobrien underscore onto user-level symbol names. */ 13168349Sobrien 132103373Sobrien#undef USER_LABEL_PREFIX 133103373Sobrien#define USER_LABEL_PREFIX "" 134103373Sobrien 13568349Sobrien/* Handle #pragma weak and #pragma pack. */ 13668349Sobrien#undef HANDLE_SYSV_PRAGMA 13768349Sobrien#define HANDLE_SYSV_PRAGMA 13868349Sobrien 13968349Sobrien/* Do not use ``thunks'' to implement C++ vtables. This method still has 14068349Sobrien fatal bugs. Also, GCC 3.0 will have a new C++ ABI that may not even 14168349Sobrien support `thunks'. */ 14268349Sobrien#undef DEFAULT_VTABLE_THUNKS 14368349Sobrien 14468349Sobrien 14568349Sobrien/************************[ Assembler stuff ]********************************/ 14668349Sobrien 14768349Sobrien/* Override the default comment-starter of "/". */ 14868349Sobrien#undef ASM_COMMENT_START 14968349Sobrien#define ASM_COMMENT_START "#" 15068349Sobrien 15168349Sobrien/* Attach a special .ident directive to the end of the file to identify 15268349Sobrien the version of GCC which compiled this code. The format of the 15380588Sobrien .ident string is patterned after the ones produced by native svr4 15468349Sobrien C compilers. */ 15584685Sobrien 15684685Sobrien#undef IDENT_ASM_OP 15784685Sobrien#define IDENT_ASM_OP ".ident" 15868349Sobrien 15968349Sobrien/* Output #ident as a .ident. */ 16068349Sobrien 16184685Sobrien#undef ASM_OUTPUT_IDENT 16284685Sobrien#define ASM_OUTPUT_IDENT(FILE, NAME) \ 16384685Sobrien fprintf ((FILE), "\t%s\t\"%s\"\n", IDENT_ASM_OP, (NAME)); 16484685Sobrien 16584685Sobrien/* Identify the front-end which produced this file. To keep symbol 16668349Sobrien space down, and not confuse kdb, only do this if the language is 16768349Sobrien not C. (svr4.h defines ASM_IDENTIFY_GCC but neglects this) */ 16868349Sobrien 16984685Sobrien#undef ASM_IDENTIFY_LANGUAGE 170111658Sobrien#define ASM_IDENTIFY_LANGUAGE(FILE) \ 171111658Sobrien { \ 172111658Sobrien if (strcmp (lang_identify (), "c") != 0) \ 173111658Sobrien output_lang_identify (FILE); \ 17480588Sobrien } 17584685Sobrien 17684685Sobrien#undef ASM_FILE_END 17784685Sobrien#define ASM_FILE_END(FILE) \ 17880588Sobrien do { \ 17980588Sobrien if (!flag_no_ident) \ 18080588Sobrien fprintf ((FILE), "\t%s\t\"[ASM_FILE_END]GCC: (%s) %s\"\n", \ 18184685Sobrien IDENT_ASM_OP, lang_identify(), version_string); \ 18284685Sobrien } while (0) 18384685Sobrien 18484685Sobrien/* This is the pseudo-op used to generate a contiguous sequence of byte 18584685Sobrien values from a double-quoted string WITHOUT HAVING A TERMINATING NUL 18680588Sobrien AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */ 18780588Sobrien 18880588Sobrien#undef ASCII_DATA_ASM_OP 18968349Sobrien#define ASCII_DATA_ASM_OP ".ascii" 19068349Sobrien 19168349Sobrien#undef ASM_BYTE_OP 19268349Sobrien#define ASM_BYTE_OP ".byte" 19368349Sobrien 19468349Sobrien/* This is how to allocate empty space in some section. The .zero 19568349Sobrien pseudo-op is used for this on most ELF assemblers. */ 19668349Sobrien 19768349Sobrien#undef SKIP_ASM_OP 19868349Sobrien#define SKIP_ASM_OP ".zero" 19968349Sobrien 20068349Sobrien/* How to output some space. The rules are different depending on the 20168349Sobrien object format. */ 20284685Sobrien#undef ASM_OUTPUT_SKIP 20384685Sobrien#define ASM_OUTPUT_SKIP(FILE, SIZE) \ 20484685Sobrien do { \ 20584685Sobrien if (TARGET_ELF) \ 20684685Sobrien { \ 20784685Sobrien fprintf ((FILE), "\t%s\t%u\n", SKIP_ASM_OP, (SIZE)); \ 20884685Sobrien } \ 20984685Sobrien else \ 21084685Sobrien { \ 21184685Sobrien fprintf ((FILE), "\t.space %u\n", (SIZE)); \ 212103373Sobrien } \ 213103373Sobrien } while (0) 214103373Sobrien 215103373Sobrien/* A table of bytes codes used by the ASM_OUTPUT_ASCII and 216103373Sobrien ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table 217103373Sobrien corresponds to a particular byte value [0..255]. For any 218103373Sobrien given byte value, if the value in the corresponding table 219103373Sobrien position is zero, the given character can be output directly. 220103373Sobrien If the table value is 1, the byte must be output as a \ooo 221103373Sobrien octal escape. If the tables value is anything else, then the 222103373Sobrien byte value should be output as a \ followed by the value 223103373Sobrien in the table. Note that we can use standard UN*X escape 224103373Sobrien sequences for many control characters, but we don't use 225103373Sobrien \a to represent BEL because some svr4 assemblers (e.g. on 226103373Sobrien the i386) don't know about that. Also, we don't use \v 227103373Sobrien since some versions of gas, such as 2.2 did not accept it. */ 228103373Sobrien 229103373Sobrien#define ESCAPES \ 230103373Sobrien"\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 231103373Sobrien\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 232103373Sobrien\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\ 233103373Sobrien\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\ 234103373Sobrien\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 235103373Sobrien\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 236103373Sobrien\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ 237103373Sobrien\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1" 238103373Sobrien 239103373Sobrien/* Some svr4 assemblers have a limit on the number of characters which 240103373Sobrien can appear in the operand of a .string directive. If your assembler 241103373Sobrien has such a limitation, you should define STRING_LIMIT to reflect that 242103373Sobrien limit. Note that at least some svr4 assemblers have a limit on the 243103373Sobrien actual number of bytes in the double-quoted string, and that they 244103373Sobrien count each character in an escape sequence as one byte. Thus, an 245103373Sobrien escape sequence like \377 would count as four bytes. 246103373Sobrien 247103373Sobrien If your target assembler doesn't support the .string directive, you 248103373Sobrien should define this to zero. 249103373Sobrien*/ 250103373Sobrien 251103373Sobrien#undef STRING_LIMIT 252103373Sobrien#define STRING_LIMIT ((unsigned) 256) 253103373Sobrien 254103373Sobrien#undef STRING_ASM_OP 255103373Sobrien#define STRING_ASM_OP ".string" 256103373Sobrien 257103373Sobrien/* Output the label which precedes a jumptable. Note that for all svr4/ELF 258103373Sobrien systems where we actually generate jumptables (which is to say every 259103373Sobrien svr4 target except i386, where we use casesi instead) we put the jump- 260103373Sobrien tables into the .rodata section and since other stuff could have been 261103373Sobrien put into the .rodata section prior to any given jumptable, we have to 262103373Sobrien make sure that the location counter for the .rodata section gets pro- 263103373Sobrien perly re-aligned prior to the actual beginning of the jump table. */ 264103373Sobrien 265103373Sobrien#undef ALIGN_ASM_OP 266103373Sobrien#define ALIGN_ASM_OP ".align" 267103373Sobrien 268103373Sobrien/* This says how to output assembler code to declare an 269103373Sobrien uninitialized external linkage data object. Under SVR4/ELF, 270103373Sobrien the linker seems to want the alignment of data objects 271103373Sobrien to depend on their types. We do exactly that here. */ 272103373Sobrien 273103373Sobrien#undef COMMON_ASM_OP 274103373Sobrien#define COMMON_ASM_OP ".comm" 275103373Sobrien 276103373Sobrien#undef ASM_OUTPUT_ALIGNED_COMMON 277103373Sobrien#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 278103373Sobrien do { \ 279103373Sobrien if (TARGET_ELF) \ 280103373Sobrien { \ 281 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \ 282 assemble_name ((FILE), (NAME)); \ 283 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \ 284 } \ 285 else \ 286 { \ 287 int rounded = (SIZE); \ 288 if (rounded == 0) rounded = 1; \ 289 rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; \ 290 rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) \ 291 * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); \ 292 fputs (".comm ", (FILE)); \ 293 assemble_name ((FILE), (NAME)); \ 294 fprintf ((FILE), ",%u\n", (rounded)); \ 295 } \ 296 } while (0) 297 298/* This says how to output assembler code to declare an 299 uninitialized internal linkage data object. Under SVR4/ELF, 300 the linker seems to want the alignment of data objects 301 to depend on their types. We do exactly that here. */ 302 303#undef LOCAL_ASM_OP 304#define LOCAL_ASM_OP ".local" 305 306/* This says how to output assembler code to declare an 307 uninitialized internal linkage data object. Under SVR4, 308 the linker seems to want the alignment of data objects 309 to depend on their types. We do exactly that here. */ 310 311#undef ASM_OUTPUT_ALIGNED_LOCAL 312#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 313 do { \ 314 if (TARGET_ELF) \ 315 { \ 316 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \ 317 assemble_name ((FILE), (NAME)); \ 318 fprintf ((FILE), "\n"); \ 319 ASM_OUTPUT_ALIGNED_COMMON ((FILE), (NAME), (SIZE), (ALIGN)); \ 320 } \ 321 else \ 322 { \ 323 int rounded = (SIZE); \ 324 if (rounded == 0) rounded = 1; \ 325 rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; \ 326 rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) \ 327 * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); \ 328 fputs (".lcomm ", (FILE)); \ 329 assemble_name ((FILE), (NAME)); \ 330 fprintf ((FILE), ",%u\n", (rounded)); \ 331 } \ 332 } while (0) 333 334#undef ASM_OUTPUT_BEFORE_CASE_LABEL 335#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) \ 336 ASM_OUTPUT_ALIGN ((FILE), 2); 337 338#undef ASM_OUTPUT_CASE_LABEL 339#define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \ 340 do { \ 341 ASM_OUTPUT_BEFORE_CASE_LABEL ((FILE), (PREFIX), (NUM), (JUMPTABLE)) \ 342 ASM_OUTPUT_INTERNAL_LABEL ((FILE), (PREFIX), (NUM)); \ 343 } while (0) 344 345/* The standard SVR4/ELF assembler seems to require that certain builtin 346 library routines (e.g. .udiv) be explicitly declared as .globl 347 in each assembly file where they are referenced. */ 348 349#undef ASM_OUTPUT_EXTERNAL_LIBCALL 350#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 351 ASM_GLOBALIZE_LABEL ((FILE), XSTR ((FUN), 0)) 352 353/* Support const sections and the ctors and dtors sections for g++. 354 Note that there appears to be two different ways to support const 355 sections at the moment. You can either #define the symbol 356 READONLY_DATA_SECTION (giving it some code which switches to the 357 readonly data section) or else you can #define the symbols 358 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and 359 SELECT_RTX_SECTION. We do both here just to be on the safe side. 360 FreeBSD conditionalizes the use of ".section rodata" depending on 361 ELF mode - otherwise .text. */ 362 363#undef USE_CONST_SECTION 364#define USE_CONST_SECTION TARGET_ELF 365 366#undef CONST_SECTION_ASM_OP 367#define CONST_SECTION_ASM_OP ".section\t.rodata" 368 369/* Define the pseudo-ops used to switch to the .ctors and .dtors sections. 370 371 Note that we want to give these sections the SHF_WRITE attribute 372 because these sections will actually contain data (i.e. tables of 373 addresses of functions in the current root executable or shared library 374 file) and, in the case of a shared library, the relocatable addresses 375 will have to be properly resolved/relocated (and then written into) by 376 the dynamic linker when it actually attaches the given shared library 377 to the executing process. (Note that on SVR4, you may wish to use the 378 `-z text' option to the ELF linker, when building a shared library, as 379 an additional check that you are doing everything right. But if you do 380 use the `-z text' option when building a shared library, you will get 381 errors unless the .ctors and .dtors sections are marked as writable 382 via the SHF_WRITE attribute.) */ 383 384#undef CTORS_SECTION_ASM_OP 385#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\"" 386#undef DTORS_SECTION_ASM_OP 387#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\"" 388 389/* On svr4, we *do* have support for the .init and .fini sections, and we 390 can put stuff in there to be executed before and after `main'. We let 391 crtstuff.c and other files know this by defining the following symbols. 392 The definitions say how to change sections to the .init and .fini 393 sections. This is the same for all known svr4 assemblers. */ 394 395#undef INIT_SECTION_ASM_OP 396#define INIT_SECTION_ASM_OP ".section\t.init" 397#undef FINI_SECTION_ASM_OP 398#define FINI_SECTION_ASM_OP ".section\t.fini" 399 400/* A default list of other sections which we might be "in" at any given 401 time. For targets that use additional sections (e.g. .tdesc) you 402 should override this definition in the target-specific file which 403 includes this file. */ 404 405#undef EXTRA_SECTIONS 406#define EXTRA_SECTIONS in_const, in_ctors, in_dtors 407 408/* A default list of extra section function definitions. For targets 409 that use additional sections (e.g. .tdesc) you should override this 410 definition in the target-specific file which includes this file. */ 411 412#undef EXTRA_SECTION_FUNCTIONS 413#define EXTRA_SECTION_FUNCTIONS \ 414 CONST_SECTION_FUNCTION \ 415 CTORS_SECTION_FUNCTION \ 416 DTORS_SECTION_FUNCTION 417 418#undef READONLY_DATA_SECTION 419#define READONLY_DATA_SECTION() const_section () 420 421extern void text_section (); 422 423#undef CONST_SECTION_FUNCTION 424#define CONST_SECTION_FUNCTION \ 425 void \ 426 const_section () \ 427 { \ 428 if (!USE_CONST_SECTION) \ 429 text_section(); \ 430 else if (in_section != in_const) \ 431 { \ 432 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \ 433 in_section = in_const; \ 434 } \ 435 } 436 437#undef CTORS_SECTION_FUNCTION 438#define CTORS_SECTION_FUNCTION \ 439 void \ 440 ctors_section () \ 441 { \ 442 if (in_section != in_ctors) \ 443 { \ 444 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \ 445 in_section = in_ctors; \ 446 } \ 447 } 448 449#undef DTORS_SECTION_FUNCTION 450#define DTORS_SECTION_FUNCTION \ 451 void \ 452 dtors_section () \ 453 { \ 454 if (in_section != in_dtors) \ 455 { \ 456 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \ 457 in_section = in_dtors; \ 458 } \ 459 } 460 461/* A C statement (sans semicolon) to output an element in the table of 462 global constructors. */ 463#undef ASM_OUTPUT_CONSTRUCTOR 464#define ASM_OUTPUT_CONSTRUCTOR(FILE, NAME) \ 465 do { \ 466 if (TARGET_ELF) \ 467 { \ 468 ctors_section (); \ 469 fprintf ((FILE), "\t%s\t ", INT_ASM_OP); \ 470 assemble_name ((FILE), (NAME)); \ 471 fprintf ((FILE), "\n"); \ 472 } \ 473 else \ 474 { \ 475 fprintf (asm_out_file, "%s \"%s__CTOR_LIST__\",22,0,0,", \ 476 ASM_STABS_OP, (TARGET_UNDERSCORES) ? "_" : ""); \ 477 assemble_name (asm_out_file, name); \ 478 fputc ('\n', asm_out_file); \ 479 } \ 480 } while (0) 481 482/* A C statement (sans semicolon) to output an element in the table of 483 global destructors. */ 484#undef ASM_OUTPUT_DESTRUCTOR 485#define ASM_OUTPUT_DESTRUCTOR(FILE, NAME) \ 486 do { \ 487 if (TARGET_ELF) \ 488 { \ 489 dtors_section (); \ 490 fprintf ((FILE), "\t%s\t ", INT_ASM_OP); \ 491 assemble_name ((FILE), (NAME)); \ 492 fprintf ((FILE), "\n"); \ 493 } \ 494 else \ 495 { \ 496 fprintf (asm_out_file, "%s \"%s__DTOR_LIST__\",22,0,0,", \ 497 ASM_STABS_OP, (TARGET_UNDERSCORES) ? "_" : ""); \ 498 assemble_name (asm_out_file, name); \ 499 fputc ('\n', asm_out_file); \ 500 } \ 501 } while (0) 502 503/* A C statement or statements to switch to the appropriate 504 section for output of RTX in mode MODE. RTX is some kind 505 of constant in RTL. The argument MODE is redundant except 506 in the case of a `const_int' rtx. Currently, these always 507 go into the const section. */ 508 509#undef SELECT_RTX_SECTION 510#define SELECT_RTX_SECTION(MODE, RTX) const_section() 511 512/* Define the strings used for the special svr4/ELF .type and .size 513 directives. These strings generally do not vary from one svr4/ELF 514 system to another. */ 515 516#undef TYPE_ASM_OP 517#define TYPE_ASM_OP ".type" 518#undef SIZE_ASM_OP 519#define SIZE_ASM_OP ".size" 520 521/* This is how we tell the assembler that a symbol is weak. */ 522 523#undef ASM_WEAKEN_LABEL 524#define ASM_WEAKEN_LABEL(FILE, NAME) \ 525 do { \ 526 fputs ("\t.globl\t", (FILE)); assemble_name ((FILE), (NAME)); \ 527 fputc ('\n', (FILE)); \ 528 fputs ("\t.weak\t", (FILE)); assemble_name ((FILE), (NAME)); \ 529 fputc ('\n', (FILE)); \ 530 } while (0) 531 532/* The following macro defines the [default] format used with ELF to output 533 the second operand of the .type assembler directive. */ 534 535#undef TYPE_OPERAND_FMT 536#define TYPE_OPERAND_FMT "@%s" 537 538/* Write the extra assembler code needed to declare a function's result. 539 Most svr4/ELF assemblers don't require any special declaration of the 540 result value. */ 541 542#undef ASM_DECLARE_RESULT 543#define ASM_DECLARE_RESULT(FILE, RESULT) 544 545/* These macros generate the special .type and .size directives which 546 are used to set the corresponding fields of the linker symbol table 547 entries in an ELF object file under SVR4/ELF. These macros also output 548 the starting labels for the relevant functions/objects. */ 549 550/* Write the extra assembler code needed to declare an object properly. */ 551 552#undef ASM_DECLARE_OBJECT_NAME 553#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 554 do { \ 555 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ 556 assemble_name (FILE, NAME); \ 557 putc (',', FILE); \ 558 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ 559 putc ('\n', FILE); \ 560 size_directive_output = 0; \ 561 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ 562 { \ 563 size_directive_output = 1; \ 564 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ 565 assemble_name (FILE, NAME); \ 566 putc (',', FILE); \ 567 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ 568 int_size_in_bytes (TREE_TYPE (DECL))); \ 569 fputc ('\n', FILE); \ 570 } \ 571 ASM_OUTPUT_LABEL(FILE, NAME); \ 572 } while (0) 573 574/* Output the size directive for a decl in rest_of_decl_compilation 575 in the case where we did not do so before the initializer. 576 Once we find the error_mark_node, we know that the value of 577 size_directive_output was set 578 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ 579 580#undef ASM_FINISH_DECLARE_OBJECT 581#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ 582 do { \ 583 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ 584 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ 585 && ! AT_END && TOP_LEVEL \ 586 && DECL_INITIAL (DECL) == error_mark_node \ 587 && !size_directive_output) \ 588 { \ 589 size_directive_output = 1; \ 590 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ 591 assemble_name (FILE, name); \ 592 putc (',', FILE); \ 593 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ 594 int_size_in_bytes (TREE_TYPE (DECL))); \ 595 fputc ('\n', FILE); \ 596 } \ 597 } while (0) 598 599 600/************************[ Debugger stuff ]*********************************/ 601 602/* All ELF targets can support DWARF-2. */ 603#undef DWARF2_DEBUGGING_INFO 604#define DWARF2_DEBUGGING_INFO 605 606/* This is BSD, so we want the DBX format. */ 607#undef DBX_DEBUGGING_INFO 608#define DBX_DEBUGGING_INFO 609 610/* Use stabs instead of DWARF debug format. */ 611#undef PREFERRED_DEBUGGING_TYPE 612#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 613 614/* But allow STABS to be supported as well. 615 Note that we want to override some definition settings done for some 616 architecture's native OS's tools that don't apply to us. */ 617#undef ASM_IDENTIFY_GCC 618#undef ASM_IDENTIFY_LANGUAGE 619 620#include "dbxelf.h" 621