/* Base configuration file for all NetBSD targets.
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
This file is part of GNU CC.
} \
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}"
+#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
1. Select the appropriate set of libs, depending on whether we're
profiling.
- 2. Include the pthread library if -pthread is specified.
+ 2. Include the pthread library if -pthread is specified (only
+ if threads are enabled).
- 3. Include the posix library if -posix is specified. */
+ 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}} \
%{!pg:-lc}} \
%{p:-lc_p} \
%{pg:-lc_p}}}"
+#else
+#define NETBSD_LIB_SPEC \
+ "%{posix: \
+ %{!p: \
+ %{!pg:-lposix}} \
+ %{p:-lposix_p} \
+ %{pg:-lposix_p}} \
+ %{!shared: \
+ %{!symbolic: \
+ %{!p: \
+ %{!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. */
/* 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,
#undef WINT_TYPE
#define WINT_TYPE "int"
+\f
+
+/* 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); \
+}
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