gencgc: More precise conservatism for pointers to boxed pages.

[sbcl.git] / src / runtime / alpha-arch.c

diff --git a/src/runtime/alpha-arch.c b/src/runtime/alpha-arch.c
index 26fa572..2f1c559 100644 (file)
--- a/src/runtime/alpha-arch.c
+++ b/src/runtime/alpha-arch.c
@@ -87,7 +87,10 @@ arch_skip_instruction(os_context_t *context)
     /* This may be complete rubbish, as (at least for traps) pc points
      * _after_ the instruction that caused us to be here anyway.
      */
-    ((char*)*os_context_pc_addr(context)) +=4; }
+    char **pcptr;
+    pcptr = (char **) os_context_pc_addr(context);
+    *pcptr += 4;
+}
 
 unsigned char *
 arch_internal_error_arguments(os_context_t *context)
@@ -98,7 +101,18 @@ arch_internal_error_arguments(os_context_t *context)
 boolean
 arch_pseudo_atomic_atomic(os_context_t *context)
 {
-    return ((*os_context_register_addr(context,reg_ALLOC)) & 1);
+    /* FIXME: this foreign_function_call_active test is dubious at
+     * best. If a foreign call is made in a pseudo atomic section
+     * (?) or more likely a pseudo atomic section is in a foreign
+     * call then an interrupt is executed immediately. Maybe it
+     * has to do with C code not maintaining pseudo atomic
+     * properly. MG - 2005-08-10
+     *
+     * The foreign_function_call_active used to live at each call-site
+     * to arch_pseudo_atomic_atomic, but this seems clearer.
+     * --NS 2007-05-15 */
+    return (!foreign_function_call_active)
+        && ((*os_context_register_addr(context,reg_ALLOC)) & 1);
 }
 
 void arch_set_pseudo_atomic_interrupted(os_context_t *context)
@@ -292,13 +306,19 @@ arch_handle_fun_end_breakpoint(os_context_t *context)
         (int)handle_fun_end_breakpoint(context);
 }
 
+void
+arch_handle_single_step_trap(os_context_t *context, int trap)
+{
+    unsigned int code = *((u32 *) (*os_context_pc_addr(context)));
+    int register_offset = code >> 5 & 0x1f;
+    handle_single_step_trap(context, trap, register_offset);
+    arch_skip_instruction(context);
+}
+
 static void
 sigtrap_handler(int signal, siginfo_t *siginfo, os_context_t *context)
 {
     unsigned int code;
-#ifdef LISP_FEATURE_LINUX
-    os_restore_fp_control(context);
-#endif
 
     /* this is different from how CMUCL does it.  CMUCL used "call_pal
      * PAL_gentrap", which doesn't do anything on Linux (unless NL0
@@ -348,46 +368,3 @@ void arch_install_interrupt_handlers()
 {
     undoably_install_low_level_interrupt_handler(SIGTRAP, sigtrap_handler);
 }
-
-extern lispobj call_into_lisp(lispobj fun, lispobj *args, int nargs);
-
-lispobj funcall0(lispobj function)
-{
-    lispobj *args = current_control_stack_pointer;
-
-    return call_into_lisp(function, args, 0);
-}
-
-lispobj funcall1(lispobj function, lispobj arg0)
-{
-    lispobj *args = current_control_stack_pointer;
-
-    current_control_stack_pointer += 1;
-    args[0] = arg0;
-
-    return call_into_lisp(function, args, 1);
-}
-
-lispobj funcall2(lispobj function, lispobj arg0, lispobj arg1)
-{
-    lispobj *args = current_control_stack_pointer;
-
-    current_control_stack_pointer += 2;
-    args[0] = arg0;
-    args[1] = arg1;
-
-    return call_into_lisp(function, args, 2);
-}
-
-lispobj funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
-{
-    lispobj *args = current_control_stack_pointer;
-
-    current_control_stack_pointer += 3;
-    args[0] = arg0;
-    args[1] = arg1;
-    args[2] = arg2;
-
-    return call_into_lisp(function, args, 3);
-}
-