ref: 12e226ac6798412271020d42645f69138715c519
dir: /libinterp/dlm-Plan9.c/
#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"); }