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authorJing Yu <jingyu@google.com>2009-11-05 15:11:04 -0800
committerJing Yu <jingyu@google.com>2009-11-05 15:11:04 -0800
commitdf62c1c110e8532b995b23540b7e3695729c0779 (patch)
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parent8d401cf711539af5a2f78d12447341d774892618 (diff)
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Check in gcc sources for prebuilt toolchains in Eclair.
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+/* Base configuration file for all OpenBSD targets.
+ Copyright (C) 1999, 2000, 2004, 2005, 2007 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 }, \
+ { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_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)
+
+/* 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
+
+/* LIB_SPEC appropriate for OpenBSD. */
+#ifdef HAS_LIBC_R
+/* -lc(_r)?(_p)?, select _r for threads, and _p for p or pg. */
+# define OBSD_LIB_SPEC "%{!shared:-lc%{pthread:_r}%{p:_p}%{!p:%{pg:_p}}}"
+#else
+/* Include -lpthread if -pthread is specified on the command line. */
+# define OBSD_LIB_SPEC "%{!shared:%{pthread:-lpthread%{p:_p}%{!p:%{pg:_p}}}} %{!shared:-lc%{p:_p}%{!p:%{pg:_p}}}"
+#endif
+
+
+#ifndef OBSD_HAS_CORRECT_SPECS
+
+#ifndef OBSD_NO_DYNAMIC_LIBRARIES
+#undef SWITCH_TAKES_ARG
+#define SWITCH_TAKES_ARG(CHAR) \
+ (DEFAULT_SWITCH_TAKES_ARG (CHAR) \
+ || (CHAR) == 'R')
+#endif
+
+#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
+
+/* LINK_SPEC appropriate for OpenBSD. Support for GCC options
+ -static, -assert, and -nostdlib. */
+#undef LINK_SPEC
+#ifdef OBSD_NO_DYNAMIC_LIBRARIES
+#define LINK_SPEC \
+ "%{g:%{!nostdlib:-L/usr/lib/debug}} %{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{assert*}"
+#else
+#define LINK_SPEC \
+ "%{g:%{!nostdlib:-L/usr/lib/debug}} %{!shared:%{!nostdlib:%{!r*:%{!e*:-e start}}}} %{shared:-Bshareable -x} -dc -dp %{R*} %{static:-Bstatic} %{assert*}"
+#endif
+
+#undef LIB_SPEC
+#define LIB_SPEC OBSD_LIB_SPEC
+#endif
+
+
+/* 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
+
+
+/* Support of shared libraries, mostly imported from svr4.h through netbsd. */
+/* Two differences from svr4.h:
+ - 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_LABEL(FILE, NAME); \
+ } 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. */
+
+
+/* Otherwise, since we support weak, gthr.h erroneously tries to use
+ #pragma weak. */
+#define GTHREAD_USE_WEAK 0
+
+/* bug work around: we don't want to support #pragma weak, but the current
+ code layout needs HANDLE_PRAGMA_WEAK asserted for __attribute((weak)) to
+ work. On the other hand, we don't define HANDLE_PRAGMA_WEAK directly,
+ as this depends on a few other details as well... */
+#define HANDLE_SYSV_PRAGMA 1
+
+/* Stack is explicitly denied execution rights on OpenBSD platforms. */
+#define ENABLE_EXECUTE_STACK \
+extern void __enable_execute_stack (void *); \
+void \
+__enable_execute_stack (void *addr) \
+{ \
+ long size = getpagesize (); \
+ long mask = ~(size-1); \
+ char *page = (char *) (((long) addr) & mask); \
+ char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
+ \
+ if (mprotect (page, end - page, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) \
+ perror ("mprotect of trampoline code"); \
+}
+
+#include <sys/types.h>
+#include <sys/mman.h>