20060303a

1 files changed, 101 insertions, 0 deletions

diff --git a/libinterp/dlm-Plan9.c b/libinterp/dlm-Plan9.c
new file mode 100644
index 00000000..7b825028
--- /dev/null
+++ b/libinterp/dlm-Plan9.c
@@ -0,0 +1,101 @@
+#include "lib9.h"
+#include "isa.h"
+#include "interp.h"
+#include "raise.h"
+#include "pool.h"
+#include "kernel.h"
+#include "dynld.h"
+
+#define	DBG	if(1) print
+
+extern Dynobj* dynld(int);
+extern char*	enverror(void);
+
+typedef struct{char *name; long sig; void (*fn)(void*); int size; int np; uchar map[16];} Runtab;
+
+static void*
+addr(char *pre, char *suf, Dynobj *o, ulong sig)
+{
+	char buf[64];
+
+	if(o == nil || strlen(pre)+strlen(suf) > 64-1)
+		return nil;
+	snprint(buf, sizeof(buf), "%s%s", pre, suf);
+	return dynimport(o, buf, sig);
+}
+
+Module*
+newdyncode(int fd, char *path, Dir *dir)
+{
+	Module *m;
+	void *v;
+	Runtab *r;
+	Dynobj *o;
+	char *name;
+
+	DBG("module path is %s\n", path);
+	m = nil;
+	o = dynld(fd);
+	if(o == nil){
+		DBG("%s\n", enverror());
+		goto Error;
+	}
+	v = addr("XXX", "module", o, signof(char*));
+	if(v == nil)
+		goto Error;
+	name = *(char**)v;
+	DBG("module name is %s\n", name);
+	r = addr(name, "modtab", o, signof(Runtab[]));
+	if(r == nil)
+		goto Error;
+	m = builtinmod(name, r, 0);
+	m->rt = DYNMOD;
+	m->dev = dir->dev;
+	m->dtype = dir->type;
+	m->qid = dir->qid;
+	m->mtime = dir->mtime;
+	m->path = strdup(path);
+	if(m->path == nil)
+		goto Error;
+	m->dlm = o;
+	DBG("module base is 0x%p\n", o->base);
+	return m;
+Error:
+	if(o != nil)
+		dynobjfree(o);
+	if(m != nil)
+		freemod(m);
+	return nil;
+}
+
+void
+freedyncode(Module *m)
+{
+	dynobjfree(m->dlm);
+}
+
+static void
+callfn(Module *m, char *fn)
+{
+	void *v, (*f)(void);
+
+	if(m->ref != 1)
+		return;
+	v = addr(m->name, fn, m->dlm, signof(*f));
+	if(v != nil){
+		f = v;
+		(*f)();
+	}
+}
+
+void
+newdyndata(Modlink *ml)
+{
+	callfn(ml->m, "init");
+}
+
+void
+freedyndata(Modlink *ml)
+{
+	callfn(ml->m, "end");
+}