228 lines
6.3 KiB
C
228 lines
6.3 KiB
C
/* Base configuration file for all NetBSD targets.
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* TARGET_OS_CPP_BUILTINS() common to all NetBSD targets. */
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#define NETBSD_OS_CPP_BUILTINS_COMMON() \
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do \
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{ \
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builtin_define ("__NetBSD__"); \
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builtin_assert ("system=unix"); \
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builtin_assert ("system=NetBSD"); \
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} \
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while (0)
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/* CPP_SPEC parts common to all NetBSD targets. */
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#define NETBSD_CPP_SPEC \
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"%{posix:-D_POSIX_SOURCE} \
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%{pthread:-D_REENTRANT -D_PTHREADS}"
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/* NETBSD_NATIVE is defined when gcc is integrated into the NetBSD
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source tree so it can be configured appropriately without using
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the GNU configure/build mechanism. */
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#ifdef NETBSD_NATIVE
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/* Look for the include files in the system-defined places. */
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#undef GPLUSPLUS_INCLUDE_DIR
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#define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++"
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#undef GCC_INCLUDE_DIR
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#define GCC_INCLUDE_DIR "/usr/include"
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#undef INCLUDE_DEFAULTS
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#define INCLUDE_DEFAULTS \
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{ \
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{ GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 }, \
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{ GCC_INCLUDE_DIR, "GCC", 0, 0 }, \
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{ 0, 0, 0, 0 } \
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}
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/* Under NetBSD, the normal location of the compiler back ends is the
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/usr/libexec directory. */
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#undef STANDARD_EXEC_PREFIX
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#define STANDARD_EXEC_PREFIX "/usr/libexec/"
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/* Under NetBSD, the normal location of the various *crt*.o files is the
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/usr/lib directory. */
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#undef STANDARD_STARTFILE_PREFIX
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#define STANDARD_STARTFILE_PREFIX "/usr/lib/"
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#endif /* NETBSD_NATIVE */
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/* Provide a LIB_SPEC appropriate for NetBSD. Here we:
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1. Select the appropriate set of libs, depending on whether we're
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profiling.
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2. Include the pthread library if -pthread is specified (only
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if threads are enabled).
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3. Include the posix library if -posix is specified.
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FIXME: Could eliminate the duplication here if we were allowed to
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use string concatenation. */
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#ifdef NETBSD_ENABLE_PTHREADS
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#define NETBSD_LIB_SPEC \
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"%{pthread: \
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%{!p: \
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%{!pg:-lpthread}} \
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%{p:-lpthread_p} \
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%{pg:-lpthread_p}} \
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%{posix: \
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%{!p: \
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%{!pg:-lposix}} \
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%{p:-lposix_p} \
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%{pg:-lposix_p}} \
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%{!shared: \
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%{!symbolic: \
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%{!p: \
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%{!pg:-lc}} \
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%{p:-lc_p} \
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%{pg:-lc_p}}}"
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#else
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#define NETBSD_LIB_SPEC \
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"%{posix: \
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%{!p: \
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%{!pg:-lposix}} \
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%{p:-lposix_p} \
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%{pg:-lposix_p}} \
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%{!shared: \
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%{!symbolic: \
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%{!p: \
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%{!pg:-lc}} \
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%{p:-lc_p} \
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%{pg:-lc_p}}}"
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#endif
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#undef LIB_SPEC
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#define LIB_SPEC NETBSD_LIB_SPEC
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/* Provide a LIBGCC_SPEC appropriate for NetBSD. We also want to exclude
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libgcc with -symbolic. */
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#ifdef NETBSD_NATIVE
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#define NETBSD_LIBGCC_SPEC \
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"%{!symbolic: \
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%{!shared: \
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%{!p: \
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%{!pg: -lgcc}}} \
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%{shared: -lgcc_pic} \
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%{p: -lgcc_p} \
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%{pg: -lgcc_p}}"
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#else
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#define NETBSD_LIBGCC_SPEC "%{!shared:%{!symbolic: -lgcc}}"
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#endif
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#undef LIBGCC_SPEC
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#define LIBGCC_SPEC NETBSD_LIBGCC_SPEC
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/* When building shared libraries, the initialization and finalization
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functions for the library are .init and .fini respectively. */
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#define COLLECT_SHARED_INIT_FUNC(STREAM,FUNC) \
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do { \
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fprintf ((STREAM), "void __init() __asm__ (\".init\");"); \
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fprintf ((STREAM), "void __init() {\n\t%s();\n}\n", (FUNC)); \
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} while (0)
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#define COLLECT_SHARED_FINI_FUNC(STREAM,FUNC) \
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do { \
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fprintf ((STREAM), "void __fini() __asm__ (\".fini\");"); \
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fprintf ((STREAM), "void __fini() {\n\t%s();\n}\n", (FUNC)); \
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} while (0)
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#undef TARGET_HAS_F_SETLKW
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#define TARGET_HAS_F_SETLKW
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/* Implicit library calls should use memcpy, not bcopy, etc. */
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#undef TARGET_MEM_FUNCTIONS
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#define TARGET_MEM_FUNCTIONS 1
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/* Handle #pragma weak and #pragma pack. */
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#define HANDLE_SYSV_PRAGMA 1
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/* Define some types that are the same on all NetBSD platforms,
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making them agree with <machine/ansi.h>. */
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE 32
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#undef WINT_TYPE
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#define WINT_TYPE "int"
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/* Attempt to turn on execute permission for the stack. This may be
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used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
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if the target machine can change execute permissions on a page).
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There is no way to query the execute permission of the stack, so
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we always issue the mprotect() call.
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Note that we go out of our way to use namespace-non-invasive calls
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here. Unfortunately, there is no libc-internal name for mprotect().
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Also note that no errors should be emitted by this code; it is considered
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dangerous for library calls to send messages to stdout/stderr. */
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#define NETBSD_ENABLE_EXECUTE_STACK \
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extern void __enable_execute_stack (void *); \
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void \
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__enable_execute_stack (void *addr) \
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{ \
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extern int mprotect (void *, size_t, int); \
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extern int __sysctl (int *, unsigned int, void *, size_t *, \
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void *, size_t); \
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\
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static int size; \
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static long mask; \
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\
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char *page, *end; \
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\
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if (size == 0) \
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{ \
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int mib[2]; \
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size_t len; \
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\
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mib[0] = 6; /* CTL_HW */ \
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mib[1] = 7; /* HW_PAGESIZE */ \
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len = sizeof (size); \
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(void) __sysctl (mib, 2, &size, &len, NULL, 0); \
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mask = ~((long) size - 1); \
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} \
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\
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page = (char *) (((long) addr) & mask); \
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end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
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\
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/* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
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(void) mprotect (page, end - page, 7); \
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}
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