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Diffstat (limited to 'gcc-4.9/gcc/config/openbsd.h')
| -rw-r--r-- | gcc-4.9/gcc/config/openbsd.h | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/openbsd.h b/gcc-4.9/gcc/config/openbsd.h new file mode 100644 index 000000000..7150d49aa --- /dev/null +++ b/gcc-4.9/gcc/config/openbsd.h @@ -0,0 +1,289 @@ +/* Base configuration file for all OpenBSD targets. + Copyright (C) 1999-2014 Free Software Foundation, 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 3, 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 COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* Common OpenBSD configuration. + All OpenBSD architectures include this file, which is intended as + a repository for common defines. + + Some defines are common to all architectures, a few of them are + triggered by OBSD_* guards, so that we won't override architecture + defaults by mistakes. + + OBSD_HAS_CORRECT_SPECS: + another mechanism provides correct specs already. + OBSD_NO_DYNAMIC_LIBRARIES: + no implementation of dynamic libraries. + OBSD_OLD_GAS: + older flavor of gas which needs help for PIC. + OBSD_HAS_DECLARE_FUNCTION_NAME, OBSD_HAS_DECLARE_FUNCTION_SIZE, + OBSD_HAS_DECLARE_OBJECT: + PIC support, FUNCTION_NAME/FUNCTION_SIZE are independent, whereas + the corresponding logic for OBJECTS is necessarily coupled. + + There are also a few `default' defines such as ASM_WEAKEN_LABEL, + intended as common ground for arch that don't provide + anything suitable. */ + +/* OPENBSD_NATIVE is defined only when gcc is configured as part of + the OpenBSD source tree, specifically through Makefile.bsd-wrapper. + + In such a case the include path can be trimmed as there is no + distinction between system includes and gcc includes. */ + +/* This configuration method, namely Makefile.bsd-wrapper and + OPENBSD_NATIVE is NOT recommended for building cross-compilers. */ + +#ifdef OPENBSD_NATIVE + +/* The compiler is configured with ONLY the gcc/g++ standard headers. */ +#undef INCLUDE_DEFAULTS +#define INCLUDE_DEFAULTS \ + { \ + { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 }, \ + { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1 }, \ + { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1 }, \ + { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0 }, \ + { 0, 0, 0, 0 } \ + } + +/* Under OpenBSD, the normal location of the various *crt*.o files is the + /usr/lib directory. */ +#undef STANDARD_STARTFILE_PREFIX +#define STANDARD_STARTFILE_PREFIX "/usr/local/lib/" + +#endif + + +/* Controlling the compilation driver. */ +/* TARGET_OS_CPP_BUILTINS() common to all OpenBSD targets. */ +#define OPENBSD_OS_CPP_BUILTINS() \ + do \ + { \ + builtin_define ("__OpenBSD__"); \ + builtin_define ("__unix__"); \ + builtin_define ("__ANSI_COMPAT"); \ + builtin_assert ("system=unix"); \ + builtin_assert ("system=bsd"); \ + builtin_assert ("system=OpenBSD"); \ + } \ + while (0) + +/* TARGET_OS_CPP_BUILTINS() common to all OpenBSD ELF targets. */ +#define OPENBSD_OS_CPP_BUILTINS_ELF() \ + do \ + { \ + OPENBSD_OS_CPP_BUILTINS(); \ + builtin_define ("__ELF__"); \ + } \ +while (0) + +/* TARGET_OS_CPP_BUILTINS() common to all LP64 OpenBSD targets. */ +#define OPENBSD_OS_CPP_BUILTINS_LP64() \ + do \ + { \ + builtin_define ("_LP64"); \ + builtin_define ("__LP64__"); \ + } \ + while (0) + +/* CPP_SPEC appropriate for OpenBSD. We deal with -posix and -pthread. + XXX the way threads are handled currently is not very satisfying, + since all code must be compiled with -pthread to work. + This two-stage defines makes it easy to pick that for targets that + have subspecs. */ +#ifdef CPP_CPU_SPEC +#define OBSD_CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" +#else +#define OBSD_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" +#endif + +#undef LIB_SPEC +#define LIB_SPEC OBSD_LIB_SPEC + +#ifndef OBSD_HAS_CORRECT_SPECS + +#undef CPP_SPEC +#define CPP_SPEC OBSD_CPP_SPEC + +#ifdef OBSD_OLD_GAS +/* ASM_SPEC appropriate for OpenBSD. For some architectures, OpenBSD + still uses a special flavor of gas that needs to be told when generating + pic code. */ +#undef ASM_SPEC +#define ASM_SPEC "%{fpic|fpie:-k} %{fPIC|fPIE:-k -K}" +#endif + +/* Since we use gas, stdin -> - is a good idea. */ +#define AS_NEEDS_DASH_FOR_PIPED_INPUT + +#undef LIB_SPEC +#define LIB_SPEC OBSD_LIB_SPEC + +#if defined(HAVE_LD_EH_FRAME_HDR) +#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " +#endif + +#undef LIB_SPEC +#define LIB_SPEC OBSD_LIB_SPEC +#endif + +#define TARGET_POSIX_IO + +/* All new versions of OpenBSD have C99 functions. We redefine this hook + so the version from elfos.h header won't be used. */ +#undef TARGET_LIBC_HAS_FUNCTION +#define TARGET_LIBC_HAS_FUNCTION default_libc_has_function + + +/* Runtime target specification. */ + +/* Miscellaneous parameters. */ + +/* Controlling debugging info: dbx options. */ + +/* Don't use the `xsTAG;' construct in DBX output; OpenBSD systems that + use DBX don't support it. */ +#define DBX_NO_XREFS + + +/* - we use . - _func instead of a local label, + - we put extra spaces in expressions such as + .type _func , @function + This is more readable for a human being and confuses c++filt less. */ + +/* Assembler format: output and generation of labels. */ + +/* Define the strings used for the .type and .size directives. + These strings generally do not vary from one system running OpenBSD + to another, but if a given system needs to use different pseudo-op + names for these, they may be overridden in the arch specific file. */ + +/* OpenBSD assembler is hacked to have .type & .size support even in a.out + format object files. Functions size are supported but not activated + yet (look for GRACE_PERIOD_EXPIRED in gas/config/obj-aout.c). + SET_ASM_OP is needed for attribute alias to work. */ + +#undef TYPE_ASM_OP +#undef SIZE_ASM_OP +#undef SET_ASM_OP +#undef GLOBAL_ASM_OP + +#define TYPE_ASM_OP "\t.type\t" +#define SIZE_ASM_OP "\t.size\t" +#define SET_ASM_OP "\t.set\t" +#define GLOBAL_ASM_OP "\t.globl\t" + +/* The following macro defines the format used to output the second + operand of the .type assembler directive. */ +#undef TYPE_OPERAND_FMT +#define TYPE_OPERAND_FMT "@%s" + +/* Provision if extra assembler code is needed to declare a function's result + (taken from svr4, not needed yet actually). */ +#ifndef ASM_DECLARE_RESULT +#define ASM_DECLARE_RESULT(FILE, RESULT) +#endif + +/* These macros generate the special .type and .size directives which + are used to set the corresponding fields of the linker symbol table + entries under OpenBSD. These macros also have to output the starting + labels for the relevant functions/objects. */ + +#ifndef OBSD_HAS_DECLARE_FUNCTION_NAME +/* Extra assembler code needed to declare a function properly. + Some assemblers may also need to also have something extra said + about the function's return value. We allow for that here. */ +#undef ASM_DECLARE_FUNCTION_NAME +#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ + do { \ + ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ + ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ + ASM_OUTPUT_FUNCTION_LABEL (FILE, NAME, DECL); \ + } while (0) +#endif + +#ifndef OBSD_HAS_DECLARE_FUNCTION_SIZE +/* Declare the size of a function. */ +#undef ASM_DECLARE_FUNCTION_SIZE +#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ + do { \ + if (!flag_inhibit_size_directive) \ + ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ + } while (0) +#endif + +#ifndef OBSD_HAS_DECLARE_OBJECT +/* Extra assembler code needed to declare an object properly. */ +#undef ASM_DECLARE_OBJECT_NAME +#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ + do { \ + HOST_WIDE_INT size; \ + ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ + size_directive_output = 0; \ + if (!flag_inhibit_size_directive \ + && (DECL) && DECL_SIZE (DECL)) \ + { \ + size_directive_output = 1; \ + size = int_size_in_bytes (TREE_TYPE (DECL)); \ + ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \ + } \ + ASM_OUTPUT_LABEL (FILE, NAME); \ + } while (0) + +/* Output the size directive for a decl in rest_of_decl_compilation + in the case where we did not do so before the initializer. + Once we find the error_mark_node, we know that the value of + size_directive_output was set by ASM_DECLARE_OBJECT_NAME + when it was run for the same decl. */ +#undef ASM_FINISH_DECLARE_OBJECT +#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ +do { \ + const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ + HOST_WIDE_INT size; \ + if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ + && ! AT_END && TOP_LEVEL \ + && DECL_INITIAL (DECL) == error_mark_node \ + && !size_directive_output) \ + { \ + size_directive_output = 1; \ + size = int_size_in_bytes (TREE_TYPE (DECL)); \ + ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \ + } \ + } while (0) +#endif + + +/* Those are `generic' ways to weaken/globalize a label. We shouldn't need + to override a processor specific definition. Hence, #ifndef ASM_* + In case overriding turns out to be needed, one can always #undef ASM_* + before including this file. */ + +/* Tell the assembler that a symbol is weak. */ +/* Note: netbsd arm32 assembler needs a .globl here. An override may + be needed when/if we go for arm32 support. */ +#ifndef ASM_WEAKEN_LABEL +#define ASM_WEAKEN_LABEL(FILE,NAME) \ + do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ + fputc ('\n', FILE); } while (0) +#endif + +/* Storage layout. */ + + +#define HAVE_ENABLE_EXECUTE_STACK |