#include "validate.h"
#include "thread.h"
+#include "gc.h"
+#if defined LISP_FEATURE_GENCGC
+#include "gencgc-internal.h"
+#endif
+
+#ifdef LISP_FEATURE_LINUX
+#include <sys/personality.h>
+#endif
+
size_t os_vm_page_size;
#ifdef LISP_FEATURE_SB_THREAD
-#include <linux/unistd.h>
+#include <sys/syscall.h>
+#include <unistd.h>
#include <errno.h>
/* values taken from the kernel's linux/futex.h. This header file
#define FUTEX_FD (2)
#define FUTEX_REQUEUE (3)
-#define __NR_sys_futex __NR_futex
+#define sys_futex sbcl_sys_futex
+static inline int sys_futex (void *futex, int op, int val, struct timespec *rel)
+{
+ return syscall (SYS_futex, futex, op, val, rel);
+}
-_syscall4(int,sys_futex,
- int *, futex,
- int, op,
- int, val,
- struct timespec *, rel);
+int
+futex_wait(int *lock_word, int oldval)
+{
+ int t= sys_futex(lock_word,FUTEX_WAIT,oldval, 0);
+ return t;
+}
+
+int
+futex_wake(int *lock_word, int n)
+{
+ return sys_futex(lock_word,FUTEX_WAKE,n,0);
+}
#endif
-#include "gc.h"
\f
int linux_sparc_siginfo_bug = 0;
int linux_no_threads_p = 0;
+#ifdef LISP_FEATURE_SB_THREAD
+int isnptl (void)
+{
+ size_t n = confstr (_CS_GNU_LIBPTHREAD_VERSION, NULL, 0);
+ if (n > 0)
+ {
+ char *buf = alloca (n);
+ confstr (_CS_GNU_LIBPTHREAD_VERSION, buf, n);
+ if (strstr (buf, "NPTL"))
+ return 1;
+ }
+ return 0;
+}
+#endif
+
void
-os_init(void)
+os_init(char *argv[], char *envp[])
{
/* Conduct various version checks: do we have enough mmap(), is
* this a sparc running 2.2, can we do threads? */
}
#ifdef LISP_FEATURE_SB_THREAD
futex_wait(futex,-1);
- if(errno==ENOSYS) linux_no_threads_p = 1;
- if(linux_no_threads_p)
- fprintf(stderr,"Linux with NPTL support (e.g. kernel 2.6 or newer) required for \nthread-enabled SBCL. Disabling thread support.\n\n");
+ if(errno==ENOSYS) {
+ lose("This version of sbcl is compiled with threading support, but your kernel is too old to support this.\n\
+Please use a more recent kernel or a version of sbcl without threading support.\n");
+ }
+ if(! isnptl()) {
+ lose("This version of sbcl only works correctly with the NPTL threading library. Please use a newer glibc, older sbcl or stop using LD_ASSUME_KERNEL");
+ }
#endif
os_vm_page_size = getpagesize();
+
+ /* KLUDGE: Disable memory randomization on new Linux kernels
+ * by setting a personality flag and re-executing. (We need
+ * to re-execute, since the memory maps that can conflict with
+ * the SBCL spaces have already been done at this point).
+ */
+#if defined(LISP_FEATURE_X86)
+ if ((major_version == 2 && minor_version >= 6)
+ || major_version >= 3)
+ {
+ long pers = personality(-1);
+ /* 0x40000 aka. ADDR_NO_RANDOMIZE */
+ if (!(pers & 0x40000)) {
+ if (personality(pers | 0x40000) != -1) {
+ /* Use /proc/self/exe instead of trying to figure out the
+ * executable path from PATH and argv[0], since that's
+ * unreliable. We follow the symlink instead of executing
+ * the file directly to avoid top from displaying the
+ * name of the process as "exe".
+ */
+ char runtime[PATH_MAX+1];
+ int i = readlink("/proc/self/exe", runtime, PATH_MAX);
+ if (i != -1) {
+ runtime[i] = '\0';
+ execve(runtime, argv, envp);
+ }
+ }
+ /* Either changing the personality or execve() failed. Either
+ * way we might as well continue, and hope that the random
+ * memory maps are ok this time around.
+ */
+ fprintf(stderr, "WARNING: Couldn't re-execute SBCL with the proper personality flags (maybe /proc isn't mounted?). Trying to continue anyway.\n");
+ }
+ }
+#endif
}
os_validate(os_vm_address_t addr, os_vm_size_t len)
{
int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
- os_vm_address_t actual ;
+ os_vm_address_t actual;
- if (addr)
- flags |= MAP_FIXED;
#ifdef LISP_FEATURE_ALPHA
- else {
- flags |= MAP_FIXED;
+ if (!addr) {
addr=under_2gb_free_pointer;
}
#endif
sig_stop_for_gc_handler);
#endif
}
-
-#ifdef LISP_FEATURE_SB_THREAD
-int
-futex_wait(int *lock_word, int oldval)
-{
- int t= sys_futex(lock_word,FUTEX_WAIT,oldval, 0);
- return t;
-}
-
-int
-futex_wake(int *lock_word, int n)
-{
- return sys_futex(lock_word,FUTEX_WAKE,n,0);
-}
-#endif