gencgc: More precise conservatism for pointers to boxed pages.

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

diff --git a/src/runtime/ppc-linux-os.c b/src/runtime/ppc-linux-os.c
index eac1593..c2dc019 100644 (file)
--- a/src/runtime/ppc-linux-os.c
+++ b/src/runtime/ppc-linux-os.c
@@ -42,6 +42,10 @@
 size_t os_vm_page_size;
 
 int arch_os_thread_init(struct thread *thread) {
+#if defined(LISP_FEATURE_SB_THREAD)
+    pthread_setspecific(specials,thread);
+#endif
+
     /* For some reason, PPC Linux appears to default to not generating
      * floating point exceptions.  PR_SET_FPEXC is a PPC-specific
      * option new in kernel 2.4.21 and 2.5.32 that allows us to
@@ -94,6 +98,34 @@ os_context_lr_addr(os_context_t *context)
 #endif
 }
 
+os_context_register_t *
+os_context_ctr_addr(os_context_t *context)
+{
+    /* Like os_context_fp_control() and os_context_lr_addr(), this
+     * uses an index beyond the declared end of the array in order to
+     * find the correct register value in the context. */
+#if defined(GLIBC231_STYLE_UCONTEXT)
+    /* FIXME: This probably should be ->ctr instead of ->gpr[PT_CTR]. */
+    return &((context->uc_mcontext.regs)->gpr[PT_CTR]);
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return &((context->uc_mcontext.uc_regs)->gregs[PT_CTR]);
+#endif
+}
+
+os_context_register_t *
+os_context_cr_addr(os_context_t *context)
+{
+    /* Like os_context_fp_control() and os_context_lr_addr(), this
+     * uses an index beyond the declared end of the array in order to
+     * find the correct register value in the context. */
+#if defined(GLIBC231_STYLE_UCONTEXT)
+    /* FIXME: This probably should be ->ccr instead of ->gpr[PT_CCR]. */
+    return &((context->uc_mcontext.regs)->gpr[PT_CCR]);
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return &((context->uc_mcontext.uc_regs)->gregs[PT_CCR]);
+#endif
+}
+
 sigset_t *
 os_context_sigmask_addr(os_context_t *context)
 {