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Diffstat (limited to 'gcc/config/darwin.h')
| -rw-r--r-- | gcc/config/darwin.h | 963 |
1 files changed, 963 insertions, 0 deletions
diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h new file mode 100644 index 0000000..9467bad --- /dev/null +++ b/gcc/config/darwin.h @@ -0,0 +1,963 @@ +/* Target definitions for Darwin (Mac OS X) systems. + Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, + 2005 + Free Software Foundation, Inc. + Contributed by Apple Computer Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#ifndef CONFIG_DARWIN_H +#define CONFIG_DARWIN_H + +/* The definitions in this file are common to all processor types + running Darwin, which is the kernel for Mac OS X. Darwin is + basically a BSD user layer laid over a Mach kernel, then evolved + for many years (at NeXT) in parallel with other Unix systems. So + while the runtime is a somewhat idiosyncratic Mach-based thing, + other definitions look like they would for a BSD variant. */ + +/* Although NeXT ran on many different architectures, as of Jan 2001 + the only supported Darwin targets are PowerPC and x86. */ + +/* One of Darwin's NeXT legacies is the Mach-O format, which is partly + like a.out and partly like COFF, with additional features like + multi-architecture binary support. */ + +#define OBJECT_FORMAT_MACHO + +/* Suppress g++ attempt to link in the math library automatically. */ +#define MATH_LIBRARY "" + +/* We have atexit. */ + +#define HAVE_ATEXIT + +/* Define an empty body for the function do_global_dtors() in libgcc2.c. */ + +#define DO_GLOBAL_DTORS_BODY + +/* The string value for __SIZE_TYPE__. */ + +#ifndef SIZE_TYPE +#define SIZE_TYPE "long unsigned int" +#endif + +/* Type used for ptrdiff_t, as a string used in a declaration. */ + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "int" + +/* wchar_t is int. */ + +#undef WCHAR_TYPE +#define WCHAR_TYPE "int" +#undef WCHAR_TYPE_SIZE +#define WCHAR_TYPE_SIZE 32 + +/* Default to using the NeXT-style runtime, since that's what is + pre-installed on Darwin systems. */ + +#define NEXT_OBJC_RUNTIME + +/* Don't default to pcc-struct-return, because gcc is the only compiler, and + we want to retain compatibility with older gcc versions. */ + +#undef DEFAULT_PCC_STRUCT_RETURN +#define DEFAULT_PCC_STRUCT_RETURN 0 + +/* True if pragma ms_struct is in effect. */ +extern GTY(()) int darwin_ms_struct; + +/* This table intercepts weirdo options whose names would interfere + with normal driver conventions, and either translates them into + standardly-named options, or adds a 'Z' so that they can get to + specs processing without interference. + + Do not expand a linker option to "-Xlinker -<option>", since that + forfeits the ability to control via spec strings later. However, + as a special exception, do this translation with -filelist, because + otherwise the driver will think there are no input files and quit. + (The alternative would be to hack the driver to recognize -filelist + specially, but it's simpler to use the translation table.) + + Note that an option name with a prefix that matches another option + name, that also takes an argument, needs to be modified so the + prefix is different, otherwise a '*' after the shorter option will + match with the longer one. + + The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined + in gcc/config/{i386,rs6000}/darwin.h, should contain any additional + command-line option translations specific to the particular target + architecture. */ + +#define TARGET_OPTION_TRANSLATE_TABLE \ + { "-all_load", "-Zall_load" }, \ + { "-allowable_client", "-Zallowable_client" }, \ + { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \ + { "-bind_at_load", "-Zbind_at_load" }, \ + { "-bundle", "-Zbundle" }, \ + { "-bundle_loader", "-Zbundle_loader" }, \ + { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \ + { "-dead_strip", "-Zdead_strip" }, \ + { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \ + { "-dependency-file", "-MF" }, \ + { "-dylib_file", "-Zdylib_file" }, \ + { "-dynamic", "-Zdynamic" }, \ + { "-dynamiclib", "-Zdynamiclib" }, \ + { "-exported_symbols_list", "-Zexported_symbols_list" }, \ + { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \ + { "-gused", "-g -feliminate-unused-debug-symbols" }, \ + { "-segaddr", "-Zsegaddr" }, \ + { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \ + { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \ + { "-seg_addr_table", "-Zseg_addr_table" }, \ + { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \ + { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \ + { "-filelist", "-Xlinker -filelist -Xlinker" }, \ + { "-findirect-virtual-calls", "-fapple-kext" }, \ + { "-flat_namespace", "-Zflat_namespace" }, \ + { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \ + { "-force_flat_namespace", "-Zforce_flat_namespace" }, \ + { "-framework", "-Xlinker -framework -Xlinker" }, \ + { "-fterminated-vtables", "-fapple-kext" }, \ + { "-image_base", "-Zimage_base" }, \ + { "-init", "-Zinit" }, \ + { "-install_name", "-Zinstall_name" }, \ + { "-mkernel", "-mkernel -static -Wa,-static" }, \ + { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \ + { "-multiply_defined", "-Zmultiply_defined" }, \ + { "-multi_module", "-Zmulti_module" }, \ + { "-static", "-static -Wa,-static" }, \ + { "-single_module", "-Zsingle_module" }, \ + { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \ + SUBTARGET_OPTION_TRANSLATE_TABLE + +#define SUBSUBTARGET_OVERRIDE_OPTIONS \ + do { \ + darwin_override_options (); \ + } while (0) + +/* These compiler options take n arguments. */ + +#undef WORD_SWITCH_TAKES_ARG +#define WORD_SWITCH_TAKES_ARG(STR) \ + (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \ + !strcmp (STR, "Zallowable_client") ? 1 : \ + !strcmp (STR, "arch") ? 1 : \ + !strcmp (STR, "arch_only") ? 1 : \ + !strcmp (STR, "Zbundle_loader") ? 1 : \ + !strcmp (STR, "client_name") ? 1 : \ + !strcmp (STR, "compatibility_version") ? 1 : \ + !strcmp (STR, "current_version") ? 1 : \ + !strcmp (STR, "Zdylib_file") ? 1 : \ + !strcmp (STR, "Zexported_symbols_list") ? 1 : \ + !strcmp (STR, "Zimage_base") ? 1 : \ + !strcmp (STR, "Zinit") ? 1 : \ + !strcmp (STR, "Zinstall_name") ? 1 : \ + !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \ + !strcmp (STR, "Zmultiply_defined") ? 1 : \ + !strcmp (STR, "precomp-trustfile") ? 1 : \ + !strcmp (STR, "read_only_relocs") ? 1 : \ + !strcmp (STR, "sectcreate") ? 3 : \ + !strcmp (STR, "sectorder") ? 3 : \ + !strcmp (STR, "Zsegaddr") ? 2 : \ + !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \ + !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \ + !strcmp (STR, "Zseg_addr_table") ? 1 : \ + !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\ + !strcmp (STR, "seg1addr") ? 1 : \ + !strcmp (STR, "segprot") ? 3 : \ + !strcmp (STR, "sub_library") ? 1 : \ + !strcmp (STR, "sub_umbrella") ? 1 : \ + !strcmp (STR, "umbrella") ? 1 : \ + !strcmp (STR, "undefined") ? 1 : \ + !strcmp (STR, "Zunexported_symbols_list") ? 1 : \ + !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \ + !strcmp (STR, "pagezero_size") ? 1 : \ + !strcmp (STR, "segs_read_only_addr") ? 1 : \ + !strcmp (STR, "segs_read_write_addr") ? 1 : \ + !strcmp (STR, "sectalign") ? 3 : \ + !strcmp (STR, "sectobjectsymbols") ? 2 : \ + !strcmp (STR, "segcreate") ? 3 : \ + !strcmp (STR, "dylinker_install_name") ? 1 : \ + 0) + +#define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \ + if (flag_mkernel || flag_apple_kext) \ + { \ + if (flag_use_cxa_atexit == 2) \ + flag_use_cxa_atexit = 0; \ + /* kexts should always be built without the coalesced sections \ + because the kernel loader doesn't grok such sections. */ \ + flag_weak = 0; \ + /* No RTTI in kexts. */ \ + flag_rtti = 0; \ + } \ + } while (0) + +/* Machine dependent cpp options. Don't add more options here, add + them to darwin_cpp_builtins in darwin-c.c. */ + +#undef CPP_SPEC +#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \ + " %{pthread:-D_REENTRANT}" + +/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus + precomp, libtool, and fat build additions. Also we + don't specify a second %G after %L because libSystem is + self-contained and doesn't need to link against libgcc.a. */ +/* In general, random Darwin linker flags should go into LINK_SPEC + instead of LINK_COMMAND_SPEC. The command spec is better for + specifying the handling of options understood by generic Unix + linkers, and for positional arguments like libraries. */ +#define LINK_COMMAND_SPEC "\ +%{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\ + %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \ + %l %X %{d} %{s} %{t} %{Z} \ + %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \ + %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \ + %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \ + %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \ + %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \ + %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \ + %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}" + +#ifdef TARGET_SYSTEM_ROOT +#define LINK_SYSROOT_SPEC \ + "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}" +#else +#define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}" +#endif + +/* Please keep the random linker options in alphabetical order (modulo + 'Z' and 'no' prefixes). Options that can only go to one of libtool + or ld must be listed twice, under both !Zdynamiclib and + Zdynamiclib, with one of the cases reporting an error. */ +/* Note that options taking arguments may appear multiple times on a + command line with different arguments each time, so put a * after + their names so all of them get passed. */ +#define LINK_SPEC \ + "%{static}%{!static:-dynamic} \ + %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\ + %{!Zdynamiclib: \ + %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \ + %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \ + %{Zbundle:-bundle} \ + %{Zbundle_loader*:-bundle_loader %*} \ + %{client_name*} \ + %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\ +} \ + %{current_version*:%e-current_version only allowed with -dynamiclib} \ + %{Zforce_flat_namespace:-force_flat_namespace} \ + %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \ + %{keep_private_externs} \ + %{private_bundle} \ + } \ + %{Zdynamiclib: \ + %{Zbundle:%e-bundle not allowed with -dynamiclib} \ + %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \ + %{client_name*:%e-client_name not allowed with -dynamiclib} \ + %{compatibility_version*} \ + %{current_version*} \ + %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \ + %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \ + %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \ + %{Zinstall_name*:-install_name %*} \ + %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \ + %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \ + } \ + %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \ + %{Zallowable_client*:-allowable_client %*} \ + %{Zbind_at_load:-bind_at_load} \ + %{Zarch_errors_fatal:-arch_errors_fatal} \ + %{Zdead_strip:-dead_strip} \ + %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \ + %{Zdylib_file*:-dylib_file %*} \ + %{Zdynamic:-dynamic}\ + %{Zexported_symbols_list*:-exported_symbols_list %*} \ + %{Zflat_namespace:-flat_namespace} \ + %{headerpad_max_install_names*} \ + %{Zimage_base*:-image_base %*} \ + %{Zinit*:-init %*} \ + %{mmacosx-version-min=*:-macosx_version_min %*} \ + %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \ + %{nomultidefs} \ + %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \ + %{Zmultiply_defined*:-multiply_defined %*} \ + %{!Zmultiply_defined*:%{shared-libgcc: \ + %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \ + %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \ + %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \ + %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \ + %{read_only_relocs} \ + %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \ + %{Zsegaddr*:-segaddr %*} \ + %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \ + %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \ + %{Zseg_addr_table*: -seg_addr_table %*} \ + %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \ + %{sub_library*} %{sub_umbrella*} \ + " LINK_SYSROOT_SPEC " \ + %{twolevel_namespace} %{twolevel_namespace_hints} \ + %{umbrella*} \ + %{undefined*} \ + %{Zunexported_symbols_list*:-unexported_symbols_list %*} \ + %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \ + %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \ + %{X} \ + %{y*} \ + %{w} \ + %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \ + %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \ + %{whatsloaded} %{dylinker_install_name*} \ + %{dylinker} %{Mach} " + + +/* Machine dependent libraries. */ + +#define LIB_SPEC "%{!static:-lSystem}" + +/* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib + libraries to link against, and by not linking against libgcc_s on + earlier-than-10.3.9. + + Note that by default, -lgcc_eh is not linked against! This is + because in a future version of Darwin the EH frame information may + be in a new format, or the fallback routine might be changed; if + you want to explicitly link against the static version of those + routines, because you know you don't need to unwind through system + libraries, you need to explicitly say -static-libgcc. + + If it is linked against, it has to be before -lgcc, because it may + need symbols from -lgcc. */ +#undef REAL_LIBGCC_SPEC +#define REAL_LIBGCC_SPEC \ + "%{static-libgcc|static: -lgcc_eh -lgcc; \ + shared-libgcc|fexceptions|fgnu-runtime: \ + %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \ + %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \ + -lgcc; \ + :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ + %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \ + -lgcc}" + +/* We specify crt0.o as -lcrt0.o so that ld will search the library path. + + crt3.o provides __cxa_atexit on systems that don't have it. Since + it's only used with C++, which requires passing -shared-libgcc, key + off that to avoid unnecessarily adding a destructor to every + powerpc program built. */ + +#undef STARTFILE_SPEC +#define STARTFILE_SPEC \ + "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \ + %{!Zbundle:%{pg:%{static:-lgcrt0.o} \ + %{!static:%{object:-lgcrt0.o} \ + %{!object:%{preload:-lgcrt0.o} \ + %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \ + %{!pg:%{static:-lcrt0.o} \ + %{!static:%{object:-lcrt0.o} \ + %{!object:%{preload:-lcrt0.o} \ + %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \ + %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" + +/* The native Darwin linker doesn't necessarily place files in the order + that they're specified on the link line. Thus, it is pointless + to put anything in ENDFILE_SPEC. */ +/* #define ENDFILE_SPEC "" */ + +/* Default Darwin ASM_SPEC, very simple. */ +#define ASM_SPEC "-arch %(darwin_arch) \ + %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}" + +/* We use Dbx symbol format. */ + +#define DBX_DEBUGGING_INFO 1 + +/* Also enable Dwarf 2 as an option. */ +#define DWARF2_DEBUGGING_INFO +#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG + +#define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug" +#define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug" +#define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug" +#define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug" +#define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug" +#define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug" +#define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug" +#define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug" +#define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug" +#define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug" + +/* When generating stabs debugging, use N_BINCL entries. */ + +#define DBX_USE_BINCL + +/* There is no limit to the length of stabs strings. */ + +#define DBX_CONTIN_LENGTH 0 + +/* gdb needs a null N_SO at the end of each file for scattered loading. */ + +#define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END + +/* GCC's definition of 'one_only' is the same as its definition of 'weak'. */ +#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) + +/* Mach-O supports 'weak imports', and 'weak definitions' in coalesced + sections. machopic_select_section ensures that weak variables go in + coalesced sections. Weak aliases (or any other kind of aliases) are + not supported. Weak symbols that aren't visible outside the .s file + are not supported. */ +#define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \ + do { \ + if (ALIAS) \ + { \ + warning (0, "alias definitions not supported in Mach-O; ignored"); \ + break; \ + } \ + \ + if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \ + targetm.asm_out.globalize_label (FILE, NAME); \ + if (DECL_EXTERNAL (DECL)) \ + fputs ("\t.weak_reference ", FILE); \ + else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \ + && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \ + break; \ + else if (TREE_PUBLIC (DECL)) \ + fputs ("\t.weak_definition ", FILE); \ + else \ + break; \ + assemble_name (FILE, NAME); \ + fputc ('\n', FILE); \ + } while (0) + +/* Darwin has the pthread routines in libSystem, which every program + links to, so there's no need for weak-ness for that. */ +#define GTHREAD_USE_WEAK 0 + +/* The Darwin linker imposes two limitations on common symbols: they + can't have hidden visibility, and they can't appear in dylibs. As + a consequence, we should never use common symbols to represent + vague linkage. */ +#undef USE_COMMON_FOR_ONE_ONLY +#define USE_COMMON_FOR_ONE_ONLY 0 + +/* The Darwin linker doesn't want coalesced symbols to appear in + a static archive's table of contents. */ +#undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC +#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1 + +/* On Darwin, we don't (at the time of writing) have linkonce sections + with names, so it's safe to make the class data not comdat. */ +#define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false + +/* We make exception information linkonce. */ +#undef TARGET_USES_WEAK_UNWIND_INFO +#define TARGET_USES_WEAK_UNWIND_INFO 1 + +/* We need to use a nonlocal label for the start of an EH frame: the + Darwin linker requires that a coalesced section start with a label. + Unfortunately, it also requires that 'debug' sections don't contain + labels. */ +#undef FRAME_BEGIN_LABEL +#define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe") + +/* Emit a label for the FDE corresponding to DECL. EMPTY means + emit a label for an empty FDE. */ +#define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label + +/* Emit a label to separate the exception table. */ +#define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label + +/* Our profiling scheme doesn't LP labels and counter words. */ + +#define NO_PROFILE_COUNTERS 1 + +#undef INIT_SECTION_ASM_OP +#define INIT_SECTION_ASM_OP + +#undef INVOKE__main + +#define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor +#define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor + +/* Always prefix with an underscore. */ + +#define USER_LABEL_PREFIX "_" + +/* Don't output a .file directive. That is only used by the assembler for + error reporting. */ +#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE +#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false + +#undef TARGET_ASM_FILE_END +#define TARGET_ASM_FILE_END darwin_file_end + +#define ASM_OUTPUT_SKIP(FILE,SIZE) \ + fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE) + +/* Give ObjC methods pretty symbol names. */ + +#undef OBJC_GEN_METHOD_LABEL +#define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \ + do { if (CAT_NAME) \ + sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \ + (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \ + else \ + sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \ + (CLASS_NAME), (SEL_NAME)); \ + } while (0) + +/* The RTTI data (e.g., __ti4name) is common and public (and static), + but it does need to be referenced via indirect PIC data pointers. + The machopic_define_symbol calls are telling the machopic subsystem + that the name *is* defined in this module, so it doesn't need to + make them indirect. */ + +#undef ASM_DECLARE_OBJECT_NAME +#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ + do { \ + const char *xname = NAME; \ + if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \ + xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \ + if (! DECL_WEAK (DECL) \ + && ((TREE_STATIC (DECL) \ + && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ + || DECL_INITIAL (DECL))) \ + machopic_define_symbol (DECL_RTL (DECL)); \ + if ((TREE_STATIC (DECL) \ + && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ + || DECL_INITIAL (DECL)) \ + (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ + ASM_OUTPUT_LABEL (FILE, xname); \ + /* Darwin doesn't support zero-size objects, so give them a \ + byte. */ \ + if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \ + assemble_zeros (1); \ + } while (0) + +#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ + do { \ + const char *xname = NAME; \ + if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \ + xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \ + if (! DECL_WEAK (DECL) \ + && ((TREE_STATIC (DECL) \ + && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ + || DECL_INITIAL (DECL))) \ + machopic_define_symbol (DECL_RTL (DECL)); \ + if ((TREE_STATIC (DECL) \ + && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ + || DECL_INITIAL (DECL)) \ + (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ + ASM_OUTPUT_LABEL (FILE, xname); \ + } while (0) + +#define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \ + do { \ + ASM_OUTPUT_LABEL (FILE, NAME); \ + /* Darwin doesn't support zero-size objects, so give them a \ + byte. */ \ + if ((SIZE) == 0) \ + assemble_zeros (1); \ + } while (0) + +/* Wrap new method names in quotes so the assembler doesn't gag. + Make Objective-C internal symbols local. */ + +#undef ASM_OUTPUT_LABELREF +#define ASM_OUTPUT_LABELREF(FILE,NAME) \ + do { \ + const char *xname = (NAME); \ + if (! strcmp (xname, "<pic base>")) \ + machopic_output_function_base_name(FILE); \ + else if (xname[0] == '&' || xname[0] == '*') \ + { \ + int len = strlen (xname); \ + if (len > 6 && !strcmp ("$stub", xname + len - 5)) \ + machopic_validate_stub_or_non_lazy_ptr (xname); \ + else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \ + machopic_validate_stub_or_non_lazy_ptr (xname); \ + else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \ + machopic_validate_stub_or_non_lazy_ptr (xname); \ + else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \ + machopic_validate_stub_or_non_lazy_ptr (xname); \ + if (xname[1] != '"' && name_needs_quotes (&xname[1])) \ + fprintf (FILE, "\"%s\"", &xname[1]); \ + else \ + fputs (&xname[1], FILE); \ + } \ + else if (xname[0] == '+' || xname[0] == '-') \ + fprintf (FILE, "\"%s\"", xname); \ + else if (!strncmp (xname, "_OBJC_", 6)) \ + fprintf (FILE, "L%s", xname); \ + else if (!strncmp (xname, ".objc_class_name_", 17)) \ + fprintf (FILE, "%s", xname); \ + else if (xname[0] != '"' && name_needs_quotes (xname)) \ + fprintf (FILE, "\"%s\"", xname); \ + else \ + asm_fprintf (FILE, "%U%s", xname); \ + } while (0) + +/* Output before executable code. */ +#undef TEXT_SECTION_ASM_OP +#define TEXT_SECTION_ASM_OP "\t.text" + +/* Output before writable data. */ + +#undef DATA_SECTION_ASM_OP +#define DATA_SECTION_ASM_OP "\t.data" + +#undef ALIGN_ASM_OP +#define ALIGN_ASM_OP ".align" + +#undef ASM_OUTPUT_ALIGN +#define ASM_OUTPUT_ALIGN(FILE,LOG) \ + if ((LOG) != 0) \ + fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)) + +/* Ensure correct alignment of bss data. */ + +#undef ASM_OUTPUT_ALIGNED_DECL_LOCAL +#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ + do { \ + unsigned HOST_WIDE_INT _new_size = SIZE; \ + fputs (".lcomm ", (FILE)); \ + assemble_name ((FILE), (NAME)); \ + if (_new_size == 0) _new_size = 1; \ + fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \ + floor_log2 ((ALIGN) / BITS_PER_UNIT)); \ + if ((DECL) && ((TREE_STATIC (DECL) \ + && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ + || DECL_INITIAL (DECL))) \ + { \ + (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ + machopic_define_symbol (DECL_RTL (DECL)); \ + } \ + } while (0) + +/* The maximum alignment which the object file format can support in + bits. For Mach-O, this is 2^15 bytes. */ + +#undef MAX_OFILE_ALIGNMENT +#define MAX_OFILE_ALIGNMENT (0x8000 * 8) + +/* Declare the section variables. */ +#ifndef USED_FOR_TARGET +enum darwin_section_enum { +#define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME, +#include "darwin-sections.def" +#undef DEF_SECTION + NUM_DARWIN_SECTIONS +}; +extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS]; +#endif + +#undef TARGET_ASM_SELECT_SECTION +#define TARGET_ASM_SELECT_SECTION machopic_select_section +#define USE_SELECT_SECTION_FOR_FUNCTIONS + +#undef TARGET_ASM_SELECT_RTX_SECTION +#define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section +#undef TARGET_ASM_UNIQUE_SECTION +#define TARGET_ASM_UNIQUE_SECTION darwin_unique_section +#undef TARGET_ASM_FUNCTION_RODATA_SECTION +#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section +#undef TARGET_ASM_RELOC_RW_MASK +#define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask + + +#define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \ + do { \ + if (FILE) { \ + if (MACHOPIC_INDIRECT) \ + fprintf (FILE, "\t.lazy_reference "); \ + else \ + fprintf (FILE, "\t.reference "); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, "\n"); \ + } \ + } while (0) + +#define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \ + do { \ + if (FILE) { \ + fprintf (FILE, "\t"); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, "=0\n"); \ + (*targetm.asm_out.globalize_label) (FILE, NAME); \ + } \ + } while (0) + +/* Globalizing directive for a label. */ +#define GLOBAL_ASM_OP ".globl " +#define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label + +/* Emit an assembler directive to set visibility for a symbol. Used + to support visibility attribute and Darwin's private extern + feature. */ +#undef TARGET_ASM_ASSEMBLE_VISIBILITY +#define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility + +/* Extra attributes for Darwin. */ +#define SUBTARGET_ATTRIBUTE_TABLE \ + /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \ + { "apple_kext_compatibility", 0, 0, false, true, false, \ + darwin_handle_kext_attribute }, \ + { "weak_import", 0, 0, true, false, false, \ + darwin_handle_weak_import_attribute } + +#undef ASM_GENERATE_INTERNAL_LABEL +#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ + sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) + +#undef TARGET_ASM_MARK_DECL_PRESERVED +#define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved + +/* Set on a symbol with SYMBOL_FLAG_FUNCTION or + MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or + variable has been defined in this translation unit. + When porting Mach-O to new architectures you need to make + sure these aren't clobbered by the backend. */ + +#define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP) +#define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1) + +/* Set on a symbol to indicate when fix-and-continue style code + generation is being used and the symbol refers to a static symbol + that should be rebound from new instances of a translation unit to + the original instance of the data. */ + +#define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2) + +/* Symbolic names for various things we might know about a symbol. */ + +enum machopic_addr_class { + MACHOPIC_UNDEFINED, + MACHOPIC_DEFINED_DATA, + MACHOPIC_UNDEFINED_DATA, + MACHOPIC_DEFINED_FUNCTION, + MACHOPIC_UNDEFINED_FUNCTION +}; + +/* Macros defining the various PIC cases. */ + +#define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC) +#define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P) +#define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P) +#define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P) + +#undef TARGET_ENCODE_SECTION_INFO +#define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info +#undef TARGET_STRIP_NAME_ENCODING +#define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding + +#define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \ + do { \ + const char *const stub_ = (STUB); \ + char *buffer_ = (BUF); \ + strcpy (buffer_, stub_); \ + if (stub_[0] == '"') \ + { \ + strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \ + } \ + else \ + { \ + strcpy (buffer_ + (STUB_LENGTH), "_binder"); \ + } \ + } while (0) + +#define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ + do { \ + const char *const symbol_ = (SYMBOL); \ + char *buffer_ = (BUF); \ + if (name_needs_quotes (symbol_) && symbol_[0] != '"') \ + { \ + sprintf (buffer_, "\"%s\"", symbol_); \ + } \ + else \ + { \ + strcpy (buffer_, symbol_); \ + } \ + } while (0) + +/* Given a symbol name string, create the lazy pointer version + of the symbol name. */ + +#define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ + do { \ + const char *symbol_ = (SYMBOL); \ + char *buffer_ = (BUF); \ + if (symbol_[0] == '"') \ + { \ + strcpy (buffer_, "\"L"); \ + strcpy (buffer_ + 2, symbol_ + 1); \ + strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \ + } \ + else if (name_needs_quotes (symbol_)) \ + { \ + strcpy (buffer_, "\"L"); \ + strcpy (buffer_ + 2, symbol_); \ + strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \ + } \ + else \ + { \ + strcpy (buffer_, "L"); \ + strcpy (buffer_ + 1, symbol_); \ + strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \ + } \ + } while (0) + +#define EH_FRAME_SECTION_NAME "__TEXT" +#define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support" + +/* Java runtime class list. */ +#define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip" + +#undef ASM_PREFERRED_EH_DATA_FORMAT +#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ + (((CODE) == 2 && (GLOBAL) == 1) \ + ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \ + ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr) + +#define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \ + darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2) + +#define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \ + darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE) + +#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \ + if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \ + darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \ + goto DONE; \ + } + +/* Experimentally, putting jump tables in text is faster on SPEC. + Also this is needed for correctness for coalesced functions. */ + +#ifndef JUMP_TABLES_IN_TEXT_SECTION +#define JUMP_TABLES_IN_TEXT_SECTION 1 +#endif + +#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false + +#define TARGET_ASM_INIT_SECTIONS darwin_init_sections +#undef TARGET_ASM_NAMED_SECTION +#define TARGET_ASM_NAMED_SECTION darwin_asm_named_section + +/* Handle pragma weak and pragma pack. */ +#define HANDLE_SYSV_PRAGMA 1 + +#define HANDLE_PRAGMA_PACK_PUSH_POP 1 + +#define DARWIN_REGISTER_TARGET_PRAGMAS() \ + do { \ + c_register_pragma (0, "mark", darwin_pragma_ignore); \ + c_register_pragma (0, "options", darwin_pragma_options); \ + c_register_pragma (0, "segment", darwin_pragma_ignore); \ + c_register_pragma (0, "unused", darwin_pragma_unused); \ + c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \ + } while (0) + +#undef ASM_APP_ON +#define ASM_APP_ON "" +#undef ASM_APP_OFF +#define ASM_APP_OFF "" + +void darwin_register_frameworks (const char *, const char *, int); +void darwin_register_objc_includes (const char *, const char *, int); +#define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes +#define TARGET_EXTRA_INCLUDES darwin_register_frameworks + +void add_framework_path (char *); +#define TARGET_OPTF add_framework_path + +#define TARGET_POSIX_IO + +/* All new versions of Darwin have C99 functions. */ + +#define TARGET_C99_FUNCTIONS 1 + +#define WINT_TYPE "int" + +/* Every program on darwin links against libSystem which contains the pthread + routines, so there's no need to explicitly call out when doing threaded + work. */ + +#undef GOMP_SELF_SPECS +#define GOMP_SELF_SPECS "" + +/* Darwin can't support anchors until we can cope with the adjustments + to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME + when outputting members of an anchor block and the linker can be + taught to keep them together or we find some other suitable + code-gen technique. */ + +#if 0 +#define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor +#else +#define TARGET_ASM_OUTPUT_ANCHOR NULL +#endif + +/* Attempt to turn on execute permission for the stack. This may be + used by INITIALIZE_TRAMPOLINE of the target needs it (that is, + if the target machine can change execute permissions on a page). + + There is no way to query the execute permission of the stack, so + we always issue the mprotect() call. + + Unfortunately it is not possible to make this namespace-clean. + + Also note that no errors should be emitted by this code; it is + considered dangerous for library calls to send messages to + stdout/stderr. */ + +#define ENABLE_EXECUTE_STACK \ +extern void __enable_execute_stack (void *); \ +void \ +__enable_execute_stack (void *addr) \ +{ \ + extern int mprotect (void *, size_t, int); \ + extern int getpagesize (void); \ + static int size; \ + static long mask; \ + \ + char *page, *end; \ + \ + if (size == 0) \ + { \ + size = getpagesize(); \ + mask = ~((long) size - 1); \ + } \ + \ + page = (char *) (((long) addr) & mask); \ + end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \ + \ + /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \ + (void) mprotect (page, end - page, 7); \ +} + +/* For Apple KEXTs, we make the constructors return this to match gcc + 2.95. */ +#define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p) +extern int flag_mkernel; +extern int flag_apple_kext; +#define TARGET_KEXTABI flag_apple_kext + +#endif /* CONFIG_DARWIN_H */ |
