1.0.41.12: gc: Unify gencgc and cheneygc interrupt-context scavenging.

[sbcl.git] / src / runtime / gencgc.c

diff --git a/src/runtime/gencgc.c b/src/runtime/gencgc.c
index be171ba..910b913 100644 (file)
--- a/src/runtime/gencgc.c
+++ b/src/runtime/gencgc.c
@@ -3822,7 +3822,6 @@ write_protect_generation_pages(generation_index_t generation)
 }
 
 #if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
-
 static void
 scavenge_control_stack(struct thread *th)
 {
@@ -3836,145 +3835,6 @@ scavenge_control_stack(struct thread *th)
     control_stack_size = current_control_stack_pointer - control_stack;
     scavenge(control_stack, control_stack_size);
 }
-
-/* Scavenging Interrupt Contexts */
-
-static int boxed_registers[] = BOXED_REGISTERS;
-
-static void
-scavenge_interrupt_context(os_context_t * context)
-{
-    int i;
-
-#ifdef reg_LIP
-    unsigned long lip;
-    unsigned long lip_offset;
-    int lip_register_pair;
-#endif
-    unsigned long pc_code_offset;
-
-#ifdef ARCH_HAS_LINK_REGISTER
-    unsigned long lr_code_offset;
-#endif
-#ifdef ARCH_HAS_NPC_REGISTER
-    unsigned long npc_code_offset;
-#endif
-
-#ifdef reg_LIP
-    /* Find the LIP's register pair and calculate it's offset */
-    /* before we scavenge the context. */
-
-    /*
-     * I (RLT) think this is trying to find the boxed register that is
-     * closest to the LIP address, without going past it.  Usually, it's
-     * reg_CODE or reg_LRA.  But sometimes, nothing can be found.
-     */
-    lip = *os_context_register_addr(context, reg_LIP);
-    lip_offset = 0x7FFFFFFF;
-    lip_register_pair = -1;
-    for (i = 0; i < (sizeof(boxed_registers) / sizeof(int)); i++) {
-        unsigned long reg;
-        long offset;
-        int index;
-
-        index = boxed_registers[i];
-        reg = *os_context_register_addr(context, index);
-        if ((reg & ~((1L<<N_LOWTAG_BITS)-1)) <= lip) {
-            offset = lip - reg;
-            if (offset < lip_offset) {
-                lip_offset = offset;
-                lip_register_pair = index;
-            }
-        }
-    }
-#endif /* reg_LIP */
-
-    /* Compute the PC's offset from the start of the CODE */
-    /* register. */
-    pc_code_offset = *os_context_pc_addr(context)
-        - *os_context_register_addr(context, reg_CODE);
-#ifdef ARCH_HAS_NPC_REGISTER
-    npc_code_offset = *os_context_npc_addr(context)
-        - *os_context_register_addr(context, reg_CODE);
-#endif /* ARCH_HAS_NPC_REGISTER */
-
-#ifdef ARCH_HAS_LINK_REGISTER
-    lr_code_offset =
-        *os_context_lr_addr(context) -
-        *os_context_register_addr(context, reg_CODE);
-#endif
-
-    /* Scanvenge all boxed registers in the context. */
-    for (i = 0; i < (sizeof(boxed_registers) / sizeof(int)); i++) {
-        int index;
-        lispobj foo;
-
-        index = boxed_registers[i];
-        foo = *os_context_register_addr(context, index);
-        scavenge(&foo, 1);
-        *os_context_register_addr(context, index) = foo;
-
-        scavenge((lispobj*) &(*os_context_register_addr(context, index)), 1);
-    }
-
-#ifdef reg_LIP
-    /* Fix the LIP */
-
-    /*
-     * But what happens if lip_register_pair is -1?
-     * *os_context_register_addr on Solaris (see
-     * solaris_register_address in solaris-os.c) will return
-     * &context->uc_mcontext.gregs[2]. But gregs[2] is REG_nPC. Is
-     * that what we really want? My guess is that that is not what we
-     * want, so if lip_register_pair is -1, we don't touch reg_LIP at
-     * all. But maybe it doesn't really matter if LIP is trashed?
-     */
-    if (lip_register_pair >= 0) {
-        *os_context_register_addr(context, reg_LIP) =
-            *os_context_register_addr(context, lip_register_pair)
-            + lip_offset;
-    }
-#endif /* reg_LIP */
-
-    /* Fix the PC if it was in from space */
-    if (from_space_p(*os_context_pc_addr(context)))
-        *os_context_pc_addr(context) =
-            *os_context_register_addr(context, reg_CODE) + pc_code_offset;
-
-#ifdef ARCH_HAS_LINK_REGISTER
-    /* Fix the LR ditto; important if we're being called from
-     * an assembly routine that expects to return using blr, otherwise
-     * harmless */
-    if (from_space_p(*os_context_lr_addr(context)))
-        *os_context_lr_addr(context) =
-            *os_context_register_addr(context, reg_CODE) + lr_code_offset;
-#endif
-
-#ifdef ARCH_HAS_NPC_REGISTER
-    if (from_space_p(*os_context_npc_addr(context)))
-        *os_context_npc_addr(context) =
-            *os_context_register_addr(context, reg_CODE) + npc_code_offset;
-#endif /* ARCH_HAS_NPC_REGISTER */
-}
-
-void
-scavenge_interrupt_contexts(struct thread *th)
-{
-    int i, index;
-    os_context_t *context;
-
-    index = fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,th));
-
-#if defined(DEBUG_PRINT_CONTEXT_INDEX)
-    printf("Number of active contexts: %d\n", index);
-#endif
-
-    for (i = 0; i < index; i++) {
-        context = th->interrupt_contexts[i];
-        scavenge_interrupt_context(context);
-    }
-}
-
 #endif
 
 #if defined(LISP_FEATURE_SB_THREAD) && (defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))