| /* Base configuration file for all OpenBSD targets. |
| Copyright (C) 1999-2021 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 "%{" FPIE1_OR_FPIC1_SPEC ":-k} %{" FPIE2_OR_FPIC2_SPEC ":-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|static-pie:--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 |