0.9.13.22:

[sbcl.git] / src / runtime / x86-bsd-os.c

diff --git a/src/runtime/x86-bsd-os.c b/src/runtime/x86-bsd-os.c
index c579f6c..490c7cf 100644 (file)
--- a/src/runtime/x86-bsd-os.c
+++ b/src/runtime/x86-bsd-os.c
@@ -1,7 +1,23 @@
 #include <signal.h>
 #include "sbcl.h"
 #include "runtime.h"
-#include "target-os.h"
+#include "thread.h"
+
+
+#ifdef LISP_FEATURE_SB_THREAD
+#ifdef LISP_FEATURE_DARWIN
+#include <architecture/i386/table.h>
+#include <i386/user_ldt.h>
+#include <mach/mach_init.h>
+#else
+#include <machine/segments.h>
+#include <machine/sysarch.h>
+#endif /* LISP_FEATURE_DARWIN */
+#endif
+
+#if defined(LISP_FEATURE_FREEBSD)
+#include "machine/npx.h"
+#endif
 
 /* KLUDGE: There is strong family resemblance in the signal context
  * stuff in FreeBSD and OpenBSD, but in detail they're different in
@@ -85,7 +101,6 @@ os_context_sp_addr(os_context_t *context)
 #endif  /* __NetBSD__ */
 
 
-
 /* FIXME: If this can be a no-op on BSD/x86, then it
  * deserves a more precise name.
  *
@@ -94,3 +109,92 @@ void
 os_flush_icache(os_vm_address_t address, os_vm_size_t length)
 {
 }
+
+/* Note: the Darwin versions of arch_os_thread_init found in
+ * x86-darwin-os.c
+*/
+#if !defined(LISP_FEATURE_DARWIN)
+
+#ifdef LISP_FEATURE_SB_THREAD
+
+void set_data_desc_size(struct segment_descriptor* desc, unsigned long size)
+{
+    desc->sd_lolimit = (size - 1) & 0xffff;
+    desc->sd_hilimit = ((size - 1) >> 16) &0xf;
+}
+
+void set_data_desc_addr(struct segment_descriptor* desc, void* addr)
+{
+    desc->sd_lobase = (unsigned int)addr & 0xffffff;
+    desc->sd_hibase = ((unsigned int)addr & 0xff000000) >> 24;
+}
+
+#endif
+
+int arch_os_thread_init(struct thread *thread) {
+
+#ifdef LISP_FEATURE_SB_THREAD
+    int n;
+    int sel;
+
+    struct segment_descriptor ldt_entry = { 0, 0, SDT_MEMRW, SEL_UPL, 1,
+                                            0, 0, 1, 0, 0 };
+
+    set_data_desc_addr(&ldt_entry, (unsigned long) thread);
+    set_data_desc_size(&ldt_entry, dynamic_values_bytes);
+
+    n = i386_set_ldt(LDT_AUTO_ALLOC, (union descriptor*) &ldt_entry, 1);
+    if (n < 0) {
+        perror("i386_set_ldt");
+        lose("unexpected i386_set_ldt(..) failure\n");
+    }
+    FSHOW_SIGNAL((stderr, "/ TLS: Allocated LDT %x\n", n));
+    sel =  LSEL(n, SEL_UPL);
+    __asm__ __volatile__ ("mov %0, %%fs" : : "r"(sel));
+
+    thread->tls_cookie=n;
+    pthread_setspecific(specials,thread);
+#endif
+
+#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
+    stack_t sigstack;
+
+    /* Signal handlers are run on the control stack, so if it is exhausted
+     * we had better use an alternate stack for whatever signal tells us
+     * we've exhausted it */
+    sigstack.ss_sp=((void *) thread)+dynamic_values_bytes;
+    sigstack.ss_flags=0;
+    sigstack.ss_size = 32*SIGSTKSZ;
+    sigaltstack(&sigstack,0);
+#endif
+
+    return 1;                  /* success */
+}
+
+int arch_os_thread_cleanup(struct thread *thread) {
+
+#if defined(LISP_FEATURE_SB_THREAD)
+    int n = thread->tls_cookie;
+
+    /* Set the %%fs register back to 0 and free the the ldt
+     * by setting it to NULL.
+     */
+    FSHOW_SIGNAL((stderr, "/ TLS: Freeing LDT %x\n", n));
+
+    __asm__ __volatile__ ("mov %0, %%fs" : : "r"(0));
+    i386_set_ldt(n, NULL, 1);
+#endif
+
+    return 1;                  /* success */
+}
+
+#endif /* !LISP_FEATURE_DARWIN */
+
+#if defined(LISP_FEATURE_FREEBSD)
+void
+os_restore_fp_control(os_context_t *context)
+{
+    struct envxmm *ex = (struct envxmm*)(&context->uc_mcontext.mc_fpstate);
+    asm ("fldcw %0" : : "m" (ex->en_cw));
+}
+#endif