0.8.1.48

[sbcl.git] / src / runtime / linux-os.c

diff --git a/src/runtime/linux-os.c b/src/runtime/linux-os.c
index d3efee8..c757711 100644 (file)
--- a/src/runtime/linux-os.c
+++ b/src/runtime/linux-os.c
@@ -40,6 +40,7 @@
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <linux/version.h>
 
 #include "validate.h"
 #include "thread.h"
@@ -47,33 +48,35 @@ size_t os_vm_page_size;
 
 #include "gc.h"
 \f
+int linux_sparc_siginfo_bug = 0;
 
-#ifdef sparc
-int early_kernel = 0;
-#endif
 void os_init(void)
 {
-    /* Early versions of Linux don't support the mmap(..) functionality
-     * that we need. */
+    /* Conduct various version checks: do we have enough mmap(), is
+     * this a sparc running 2.2, can we do threads? */
     {
         struct utsname name;
        int major_version;
-#ifdef sparc
        int minor_version;
-#endif
+       char *p;
        uname(&name);
-       major_version = atoi(name.release);
-       if (major_version < 2) {
-           lose("linux major version=%d (can't run in version < 2.0.0)",
+       p=name.release;  
+       major_version = atoi(p);
+       p=strchr(p,'.')+1;
+       minor_version = atoi(p);
+       if (major_version<2) {
+           lose("linux kernel version too old: major version=%d (can't run in version < 2.0.0)",
                 major_version);
        }
-#ifdef sparc
-       /* KLUDGE: This will break if Linux moves to a uname() version number
-        * that has more than one digit initially -- CSR, 2002-02-12 */
-       minor_version = atoi(name.release+2);
-       if (minor_version < 4) {
-           FSHOW((stderr,"linux minor version=%d;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", minor_version));
-           early_kernel = 1;
+#ifdef LISP_FEATURE_SB_THREAD
+       if ((major_version <2) || (major_version==2 && minor_version < 4)) {
+           lose("linux kernel 2.4 required for thread-enabled SBCL");
+       }
+#endif
+#ifdef LISP_FEATURE_SPARC
+       if ((major_version <2) || (major_version==2 && minor_version < 4)) {
+           FSHOW((stderr,"linux kernel %d.%d predates 2.4;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", major_version,minor_version));
+           linux_sparc_siginfo_bug = 1;
        }
 #endif
     }
@@ -248,6 +251,8 @@ void sigcont_handler(int signal, siginfo_t *info, void *void_context)
     /* we need to have a handler installed for this signal so that
      * sigwaitinfo() for it actually returns at the appropriate time
      */
+    fprintf(stderr, "Thread %d received stray SIGCONT\n",
+           arch_os_get_current_thread()->pid);
 }
 
 void