X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fppc-linux-os.c;h=07124f11c4a56d023c804e2a10bce159eb119496;hb=059b8dcf4d34fe9e7b96ed889e19e43b8b98906c;hp=c5dc7a29dd132bb38886645b3ee6f5f52780e3de;hpb=c1b4849c95bad4f3535fba2b9307fd37e15bcf6d;p=sbcl.git

diff --git a/src/runtime/ppc-linux-os.c b/src/runtime/ppc-linux-os.c
index c5dc7a2..07124f1 100644
--- a/src/runtime/ppc-linux-os.c
+++ b/src/runtime/ppc-linux-os.c
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <sys/param.h>
 #include <sys/file.h>
+#include "sbcl.h"
 #include "./signal.h"
 #include "os.h"
 #include "arch.h"
@@ -25,7 +26,6 @@
 #include "interrupt.h"
 #include "interr.h"
 #include "lispregs.h"
-#include "sbcl.h"
 #include <sys/socket.h>
 #include <sys/utsname.h>
 
@@ -36,38 +36,102 @@
 #include <unistd.h>
 
 #include "validate.h"
+#include "ppc-linux-mcontext.h"
+
 size_t os_vm_page_size;
 
-#if defined GENCGC		/* unlikely ... */
-#error SBCL PPC does not work with the GENCGC
-#include "gencgc.h"
-#endif
+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)
 {
+#if defined(GLIBC231_STYLE_UCONTEXT)
     return &((context->uc_mcontext.regs)->gpr[offset]);
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return &((context->uc_mcontext.uc_regs->gregs)[offset]);
+#endif
 }
 
 os_context_register_t *
 os_context_pc_addr(os_context_t *context)
 {
+#if defined(GLIBC231_STYLE_UCONTEXT)
     return &((context->uc_mcontext.regs)->nip);
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return &((context->uc_mcontext.uc_regs->gregs)[PT_NIP]);
+#endif
 }
 
 os_context_register_t *
 os_context_lr_addr(os_context_t *context)
 {
+#if defined(GLIBC231_STYLE_UCONTEXT)
     return &((context->uc_mcontext.regs)->link);
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return &((context->uc_mcontext.uc_regs->gregs)[PT_LNK]);
+#endif
 }
 
 sigset_t *
 os_context_sigmask_addr(os_context_t *context)
 {
+#if defined(GLIBC231_STYLE_UCONTEXT)
+    return &context->uc_sigmask;
+#elif defined(GLIBC232_STYLE_UCONTEXT)
     return &context->uc_sigmask;
+#endif
+}
+
+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 */
+#if defined(GLIBC231_STYLE_UCONTEXT)
+    return context->uc_mcontext.regs->gpr[PT_FPSCR];
+#elif defined(GLIBC232_STYLE_UCONTEXT)
+    return context->uc_mcontext.uc_regs->gregs[PT_FPSCR];
+#endif
+}
+
+void
+os_restore_fp_control(os_context_t *context)
+{
+    unsigned long control;
+    double d;
+
+    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;
+
+    d = *((double *) &control);
+    /* Hmp.  Apparently the following doesn't work either:
+
+    asm volatile ("mtfsf 0xff,%0" : : "f" (d));
+
+    causing segfaults at the first GC.
+    */
 }
 
-void os_flush_icache(os_vm_address_t address, os_vm_size_t length)
+void
+os_flush_icache(os_vm_address_t address, os_vm_size_t length)
 {
     /* see ppc-arch.c */
     ppc_flush_icache(address,length);