#include "validate.h"
size_t os_vm_page_size;
-#if defined GENCGC /* unlikely ... */
-#error SBCL PPC does not work with the GENCGC
-#include "gencgc.h"
-#endif
+struct thread *arch_os_get_current_thread() {
+ return all_threads;
+}
+int arch_os_thread_init(struct thread *thread) {
+ return 1; /* success */
+}
+int arch_os_thread_cleanup(struct thread *thread) {
+ return 1; /* success */
+}
os_context_register_t *
os_context_register_addr(os_context_t *context, int offset)
return &context->uc_sigmask;
}
-void os_flush_icache(os_vm_address_t address, os_vm_size_t length)
+unsigned long
+os_context_fp_control(os_context_t *context)
+{
+ /* So this may look like nice, well behaved code. However, closer
+ inspection reveals that gpr is simply the general purpose
+ registers, and PT_FPSCR is an offset that is larger than 32
+ (the number of ppc registers), but that happens to get the
+ right answer. -- CSR, 2002-07-11 */
+ return context->uc_mcontext.regs->gpr[PT_FPSCR];
+}
+
+void
+os_restore_fp_control(os_context_t *context)
+{
+ unsigned long control;
+
+ control = os_context_fp_control(context) &
+ /* FIXME: Should we preserve the user's requested rounding mode?
+
+ Note that doing
+
+ ~(FLOAT_STICKY_BITS_MASK | FLOAT_EXCEPTIONS_BYTE_MASK)
+
+ here leads to infinite SIGFPE for invalid operations, as
+ there are bits in the control register that need to be
+ cleared that are let through by that mask. -- CSR, 2002-07-16 */
+ FLOAT_TRAPS_BYTE_MASK;
+
+ /* FIXME: Shoot me now.
+
+ Hardcoded nastiness: the "0"s below refer to the first floating
+ point registers -- we should let gcc deal with that. The 8(31)
+ refers to the position on the stack, less one, of control (we
+ need for control to be the high word of the double loaded by
+ lfd; how do I know that r31 contains the stack? I don't, I'm
+ just guessing. The 255, on the other hand, is a valid constant
+ -- it says "move everything in the upper word into the floating
+ point control register. -- CSR, 2002-07-16 */
+ asm ("stw %0, 12(31); lfd 0, 8(31); mtfsf 255, 0" : : "r" (control) : "r31");
+}
+
+void
+os_flush_icache(os_vm_address_t address, os_vm_size_t length)
{
/* see ppc-arch.c */
ppc_flush_icache(address,length);