#include <string.h>
#include "_scm.h"
#include "frames.h"
+#include "vm.h"
#include <verify.h>
/* Make sure assumptions on the layout of `struct scm_vm_frame' hold. */
verify (sizeof (SCM) == sizeof (SCM *));
-verify (sizeof (struct scm_vm_frame) == 4 * sizeof (SCM));
+verify (sizeof (struct scm_vm_frame) == 3 * sizeof (SCM));
verify (offsetof (struct scm_vm_frame, dynamic_link) == 0);
\f
(((SCM *) (val)) + SCM_VM_FRAME_OFFSET (frame))
SCM
-scm_c_make_frame (SCM stack_holder, SCM *fp, SCM *sp,
- scm_t_uint8 *ip, scm_t_ptrdiff offset)
+scm_c_make_frame (enum scm_vm_frame_kind frame_kind, void *stack_holder,
+ scm_t_ptrdiff fp_offset, scm_t_ptrdiff sp_offset,
+ scm_t_uint32 *ip)
{
struct scm_frame *p = scm_gc_malloc (sizeof (struct scm_frame),
"vmframe");
p->stack_holder = stack_holder;
- p->fp = fp;
- p->sp = sp;
+ p->fp_offset = fp_offset;
+ p->sp_offset = sp_offset;
p->ip = ip;
- p->offset = offset;
- return scm_cell (scm_tc7_frame, (scm_t_bits)p);
+ return scm_cell (scm_tc7_frame | (frame_kind << 8), (scm_t_bits)p);
}
void
scm_puts_unlocked (">", port);
}
+SCM*
+scm_i_frame_stack_base (SCM frame)
+#define FUNC_NAME "frame-stack-base"
+{
+ void *stack_holder;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame);
+
+ switch (SCM_VM_FRAME_KIND (frame))
+ {
+ case SCM_VM_FRAME_KIND_CONT:
+ return ((struct scm_vm_cont *) stack_holder)->stack_base;
+
+ case SCM_VM_FRAME_KIND_VM:
+ return ((struct scm_vm *) stack_holder)->stack_base;
+
+ default:
+ abort ();
+ }
+}
+#undef FUNC_NAME
+
+scm_t_ptrdiff
+scm_i_frame_offset (SCM frame)
+#define FUNC_NAME "frame-offset"
+{
+ void *stack_holder;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame);
+
+ switch (SCM_VM_FRAME_KIND (frame))
+ {
+ case SCM_VM_FRAME_KIND_CONT:
+ return ((struct scm_vm_cont *) stack_holder)->reloc;
+
+ case SCM_VM_FRAME_KIND_VM:
+ return 0;
+
+ default:
+ abort ();
+ }
+}
+#undef FUNC_NAME
+
\f
/* Scheme interface */
}
#undef FUNC_NAME
+static SCM frame_arguments_var;
+
+static void
+init_frame_arguments_var (void)
+{
+ frame_arguments_var
+ = scm_c_private_lookup ("system vm frame", "frame-arguments");
+}
+
SCM_DEFINE (scm_frame_arguments, "frame-arguments", 1, 0, 0,
(SCM frame),
"")
#define FUNC_NAME s_scm_frame_arguments
{
- static SCM var = SCM_BOOL_F;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
+ static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT;
+ scm_i_pthread_once (&once, init_frame_arguments_var);
- if (scm_is_false (var))
- var = scm_c_module_lookup (scm_c_resolve_module ("system vm frame"),
- "frame-arguments");
+ SCM_VALIDATE_VM_FRAME (1, frame);
- return scm_call_1 (SCM_VARIABLE_REF (var), frame);
+ return scm_call_1 (scm_variable_ref (frame_arguments_var), frame);
}
#undef FUNC_NAME
"")
#define FUNC_NAME s_scm_frame_num_locals
{
- SCM *sp, *p;
+ SCM *fp, *sp;
SCM_VALIDATE_VM_FRAME (1, frame);
+ fp = SCM_VM_FRAME_FP (frame);
sp = SCM_VM_FRAME_SP (frame);
- p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
- return scm_from_ptrdiff_t (sp + 1 - p);
+ return scm_from_ptrdiff_t (SCM_FRAME_NUM_LOCALS (fp, sp));
}
#undef FUNC_NAME
"")
#define FUNC_NAME s_scm_frame_local_ref
{
- SCM *sp, *p;
+ SCM *fp, *sp;
unsigned int i;
SCM_VALIDATE_VM_FRAME (1, frame);
SCM_VALIDATE_UINT_COPY (2, index, i);
+ fp = SCM_VM_FRAME_FP (frame);
sp = SCM_VM_FRAME_SP (frame);
- p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
- if (p + i <= sp)
- return SCM_FRAME_VARIABLE (SCM_VM_FRAME_FP (frame), i);
+ if (i < SCM_FRAME_NUM_LOCALS (fp, sp))
+ return SCM_FRAME_LOCAL (fp, i);
SCM_OUT_OF_RANGE (SCM_ARG2, index);
}
"")
#define FUNC_NAME s_scm_frame_local_set_x
{
- SCM *sp, *p;
+ SCM *fp, *sp;
unsigned int i;
SCM_VALIDATE_VM_FRAME (1, frame);
SCM_VALIDATE_UINT_COPY (2, index, i);
+ fp = SCM_VM_FRAME_FP (frame);
sp = SCM_VM_FRAME_SP (frame);
- p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
- if (p + i <= sp)
+ if (i < SCM_FRAME_NUM_LOCALS (fp, sp))
{
- SCM_FRAME_VARIABLE (SCM_VM_FRAME_FP (frame), i) = val;
+ SCM_FRAME_LOCAL (fp, i) = val;
return SCM_UNSPECIFIED;
}
new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp);
if (new_fp)
{
+ SCM *stack_base = scm_i_frame_stack_base (frame);
new_fp = RELOC (frame, new_fp);
- new_sp = SCM_FRAME_LOWER_ADDRESS (this_fp) - 1;
- frame = scm_c_make_frame (SCM_VM_FRAME_STACK_HOLDER (frame),
- new_fp, new_sp,
- SCM_FRAME_RETURN_ADDRESS (this_fp),
- SCM_VM_FRAME_OFFSET (frame));
+ new_sp = SCM_FRAME_PREVIOUS_SP (this_fp);
+ frame = scm_c_make_frame (SCM_VM_FRAME_KIND (frame),
+ SCM_VM_FRAME_STACK_HOLDER (frame),
+ new_fp - stack_base, new_sp - stack_base,
+ SCM_FRAME_RETURN_ADDRESS (this_fp));
proc = scm_frame_procedure (frame);
- if (SCM_RTL_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
+ if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
goto again;
else
return frame;