#include <stdio.h>
#include <sys/param.h>
#include <sys/file.h>
+#include "sbcl.h"
#include "./signal.h"
#include "os.h"
#include "arch.h"
#include "interrupt.h"
#include "interr.h"
#include "lispregs.h"
-#include "sbcl.h"
#include <sys/socket.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <unistd.h>
-#include "validate.h"
/* for cacheflush() */
-#include <asm/cachectl.h>
+#include <sys/cachectl.h>
-/* FIXME: For CAUSEF_BD */
+/* for BD_CAUSE */
#include <asm/mipsregs.h>
+
+#include "validate.h"
+
size_t os_vm_page_size;
+int
+arch_os_thread_init(struct thread *thread)
+{
+#ifdef LISP_FEATURE_SB_THREAD
+#warning "Check threading support functions"
+#endif
+ return 1; /* success */
+}
+
+int
+arch_os_thread_cleanup(struct thread *thread)
+{
+#ifdef LISP_FEATURE_SB_THREAD
+#warning "Check threading support functions"
+#endif
+ return 1; /* success */
+}
os_context_register_t *
os_context_register_addr(os_context_t *context, int offset)
{
- if (offset == 0) {
- /* KLUDGE: I'm not sure, but it's possible that Linux puts the
- contents of the Processor Status Word in the (wired-zero)
- slot in the mcontext. In any case, the following is
- unlikely to do any harm: */
- static unsigned long long zero;
- zero = 0;
- return &zero;
- } else {
- return &(((struct sigcontext *) &(context->uc_mcontext))->sc_regs[offset]);
- }
+ return &(((struct sigcontext *)&(context->uc_mcontext))->sc_regs[offset]);
}
os_context_register_t *
os_context_pc_addr(os_context_t *context)
{
/* Why do I get all the silly ports? -- CSR, 2002-08-11 */
- return &(((struct sigcontext *) &(context->uc_mcontext))->sc_pc);
+ return &(((struct sigcontext *)&(context->uc_mcontext))->sc_pc);
}
sigset_t *
return &(context->uc_sigmask);
}
-void
+unsigned int
+os_context_fp_control(os_context_t *context)
+{
+ /* FIXME: Probably do something. */
+ return 0;
+}
+
+void
os_restore_fp_control(os_context_t *context)
{
/* FIXME: Probably do something. */
{
/* We need to see if whatever happened, happened because of a
branch delay event */
- return (((struct sigcontext *) &(context->uc_mcontext))->sc_cause
- & CAUSEF_BD);
+ /* FIXME: However, I'm not convinced that the values that Linux
+ puts in this slot are actually right; specifically, attempting
+ to compile sbcl with sbcl-0.7.7.7 lead to an "infinite SIGTRAP
+ loop" where a (BREAK 16) not in a branch delay slot would have
+ CAUSEF_BD filled. So, we comment
+
+ return (((struct sigcontext *) &(context->uc_mcontext))->sc_cause
+ & CAUSEF_BD);
+
+ out and return 0 always. -- CSR, 2002-09-02 */
+ /* Unfortunately, returning 0 fails for taken branches because
+ os_context_bd_cause is also used to find out if a branch
+ emulation is needed. We work around that by checking if the
+ current instruction is a jump or a branch. */
+ unsigned int inst = *((unsigned int *)(unsigned int)(*os_context_pc_addr(context)));
+
+ switch (inst >> 26) {
+ case 0x0: /* immediate jumps */
+ switch (inst & 0x3f) {
+ case 0x08:
+ case 0x09:
+ return CAUSEF_BD;
+ }
+ break;
+ /* branches and register jumps */
+ case 0x1:
+ case 0x2:
+ case 0x3:
+ case 0x4:
+ case 0x5:
+ case 0x6:
+ case 0x7:
+ return CAUSEF_BD;
+ }
+ return 0;
}
-void
+void
os_flush_icache(os_vm_address_t address, os_vm_size_t length)
{
if (cacheflush(address, length, ICACHE) == -1)
- perror("cacheflush");
+ perror("cacheflush");
}