diff options
Diffstat (limited to 'contrib/gcc/config/netbsd.h')
| -rw-r--r-- | contrib/gcc/config/netbsd.h | 154 |
1 files changed, 133 insertions, 21 deletions
diff --git a/contrib/gcc/config/netbsd.h b/contrib/gcc/config/netbsd.h index 227942c..0441389 100644 --- a/contrib/gcc/config/netbsd.h +++ b/contrib/gcc/config/netbsd.h @@ -1,6 +1,50 @@ +/* Base configuration file for all NetBSD targets. + Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 + Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* TARGET_OS_CPP_BUILTINS() common to all NetBSD targets. */ +#define NETBSD_OS_CPP_BUILTINS_COMMON() \ + do \ + { \ + builtin_define ("__NetBSD__"); \ + builtin_assert ("system=unix"); \ + builtin_assert ("system=NetBSD"); \ + } \ + while (0) + +/* TARGET_OS_CPP_BUILTINS() common to all LP64 NetBSD targets. */ +#define NETBSD_OS_CPP_BUILTINS_LP64() \ + do \ + { \ + builtin_define ("_LP64"); \ + } \ + while (0) + +/* CPP_SPEC parts common to all NetBSD targets. */ +#define NETBSD_CPP_SPEC \ + "%{posix:-D_POSIX_SOURCE} \ + %{pthread:-D_REENTRANT -D_PTHREADS}" + /* NETBSD_NATIVE is defined when gcc is integrated into the NetBSD source tree so it can be configured appropriately without using - the GNU configure/build mechanism. */ + the GNU configure/build mechanism. */ #ifdef NETBSD_NATIVE @@ -35,20 +79,39 @@ #endif /* NETBSD_NATIVE */ -/* Provide a CPP_SPEC appropriate for NetBSD. Currently we just deal with - the GCC option `-posix'. */ +/* Provide a LIB_SPEC appropriate for NetBSD. Here we: -#undef CPP_SPEC -#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE}" + 1. Select the appropriate set of libs, depending on whether we're + profiling. + 2. Include the pthread library if -pthread is specified (only + if threads are enabled). -/* Provide a LIB_SPEC appropriate for NetBSD. Just select the appropriate - libc, depending on whether we're doing profiling; if `-posix' is specified, - link against the appropriate libposix first. Don't include libc when - linking a shared library. */ + 3. Include the posix library if -posix is specified. -#undef LIB_SPEC -#define LIB_SPEC \ + FIXME: Could eliminate the duplication here if we were allowed to + use string concatenation. */ + +#ifdef NETBSD_ENABLE_PTHREADS +#define NETBSD_LIB_SPEC \ + "%{pthread: \ + %{!p: \ + %{!pg:-lpthread}} \ + %{p:-lpthread_p} \ + %{pg:-lpthread_p}} \ + %{posix: \ + %{!p: \ + %{!pg:-lposix}} \ + %{p:-lposix_p} \ + %{pg:-lposix_p}} \ + %{!shared: \ + %{!symbolic: \ + %{!p: \ + %{!pg:-lc}} \ + %{p:-lc_p} \ + %{pg:-lc_p}}}" +#else +#define NETBSD_LIB_SPEC \ "%{posix: \ %{!p: \ %{!pg:-lposix}} \ @@ -60,24 +123,30 @@ %{!pg:-lc}} \ %{p:-lc_p} \ %{pg:-lc_p}}}" +#endif + +#undef LIB_SPEC +#define LIB_SPEC NETBSD_LIB_SPEC /* Provide a LIBGCC_SPEC appropriate for NetBSD. We also want to exclude libgcc with -symbolic. */ -#undef LIBGCC_SPEC #ifdef NETBSD_NATIVE -#define LIBGCC_SPEC \ +#define NETBSD_LIBGCC_SPEC \ "%{!symbolic: \ %{!shared: \ %{!p: \ - %{!pg: -lgcc}}} \ + %{!pg: -lgcc}}} \ %{shared: -lgcc_pic} \ %{p: -lgcc_p} \ %{pg: -lgcc_p}}" #else -#define LIBGCC_SPEC "%{!shared:%{!symbolic: -lgcc}}" +#define NETBSD_LIBGCC_SPEC "%{!shared:%{!symbolic: -lgcc}}" #endif +#undef LIBGCC_SPEC +#define LIBGCC_SPEC NETBSD_LIBGCC_SPEC + /* When building shared libraries, the initialization and finalization functions for the library are .init and .fini respectively. */ @@ -93,11 +162,6 @@ fprintf ((STREAM), "void __fini() {\n\t%s();\n}\n", (FUNC)); \ } while (0) -/* Allow #sccs in preprocessor. */ - -#undef SCCS_DIRECTIVE -#define SCCS_DIRECTIVE - #undef TARGET_HAS_F_SETLKW #define TARGET_HAS_F_SETLKW @@ -108,7 +172,7 @@ /* Handle #pragma weak and #pragma pack. */ -#define HANDLE_SYSV_PRAGMA +#define HANDLE_SYSV_PRAGMA 1 /* Define some types that are the same on all NetBSD platforms, @@ -122,3 +186,51 @@ #undef WINT_TYPE #define WINT_TYPE "int" + + +/* Attempt to turn on execute permission for the stack. This may be + used by TRANSFER_FROM_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. + + Note that we go out of our way to use namespace-non-invasive calls + here. Unfortunately, there is no libc-internal name for mprotect(). + + 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 NETBSD_ENABLE_EXECUTE_STACK \ +extern void __enable_execute_stack (void *); \ +void \ +__enable_execute_stack (addr) \ + void *addr; \ +{ \ + extern int mprotect (void *, size_t, int); \ + extern int __sysctl (int *, unsigned int, void *, size_t *, \ + void *, size_t); \ + \ + static int size; \ + static long mask; \ + \ + char *page, *end; \ + \ + if (size == 0) \ + { \ + int mib[2]; \ + size_t len; \ + \ + mib[0] = 6; /* CTL_HW */ \ + mib[1] = 7; /* HW_PAGESIZE */ \ + len = sizeof (size); \ + (void) __sysctl (mib, 2, &size, &len, NULL, 0); \ + mask = ~((long) size - 1); \ + } \ + \ + page = (char *) (((long) addr) & mask); \ + end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ + \ + /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \ + (void) mprotect (page, end - page, 7); \ +} |
