Blame src/ldso/nt64/dynlink.c

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#define _BSD_SOURCE
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dlfcn.h>
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#include "psxglue.h"
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#include "pthread_impl.h"
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extern const struct __ldso_vtbl * __ldso_vtbl;
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extern const struct __psx_vtbl *  __psx_vtbl;
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static pthread_rwlock_t __ldso_lock;
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void * dlopen(const char * file, int mode)
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{
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	int		status;
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	void *		base;
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	int		cs;
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	char *		ch;
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	char *		next;
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	char *		epath;
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	char *		lpath;
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	const char **	lpathv;
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	const char **	epathv;
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	char		lpathbuf[2048];
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	const char *	lpathvbuf[64];
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	int		i;
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	/* prolog */
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	if (!file)
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		return __ldso_vtbl->dlopen(0,mode,0,&status);
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	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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	pthread_rwlock_wrlock(&__ldso_lock);
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	__inhibit_ptc();
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	/* loader path environment variable to loader path vector */
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	if ((epath = getenv("LD_LIBRARY_PATH"))) {
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		lpath = (strncpy(lpathbuf,epath,2048) < &lpathbuf[2048])
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			? lpathbuf
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			: strdup(epath);
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		if ((i = !!lpath))
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			for (ch=lpath; *ch; ch++)
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				if (*ch == ':')
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					i++;
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		lpathv = (++i < 64)
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			? lpathvbuf
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			: calloc(++i,sizeof(char *));
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	} else {
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		lpath    = lpathbuf;
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		lpathv   = lpathvbuf;
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		lpath[0] = 0;
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	}
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	if (lpath && lpathv) {
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		ch     = lpath;
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		next   = *ch ? ch : 0;
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		epathv = lpathv;
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		for (; next; ) {
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			*epathv++ = (*next == ':')
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				? "."
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				: next;
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			ch = &next[1];
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			for (; *ch; ) {
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				if (*ch == ':') {
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					*ch = 0;
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					ch  = 0;
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				} else {
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					ch++;
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				}
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			}
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			next = *ch ? ch : 0;
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		}
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		*epathv = 0;
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	}
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	/* dlopen */
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	base = (lpath && lpathv)
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		? __ldso_vtbl->dlopen(file,mode,lpathv,&status)
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		: 0;
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	/* epilog */
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	if (lpath && (lpath != lpathbuf))
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		free(lpath);
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	if (lpathv && (lpathv != lpathvbuf))
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		free(lpathv);
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	__release_ptc();
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	pthread_rwlock_unlock(&__ldso_lock);
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	if (base)
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		__psx_vtbl->do_global_ctors_fn();
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	pthread_setcancelstate(cs, 0);
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	return base;
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}
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int __dladdr(const void * addr, Dl_info * info)
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{
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	return __ldso_vtbl->dladdr(addr,info);
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}
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int __dlinfo(void * dso, int req, void * res)
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{
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	return (__ldso_vtbl->dlinfo(dso,req,res)) ? -1 : 0;
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}
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void *__dlsym(void * restrict p, const char * restrict s)
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{
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	return __ldso_vtbl->dlsym(p,s,0);
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}
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int dlclose(void *p)
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{
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        return __ldso_vtbl->dlclose(p);
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}
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char * dlerror(void)
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{
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	return __ldso_vtbl->dlerror();
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}
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void __reset_tls(void)
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{
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	__ldso_vtbl->reset_tls();
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}
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void *__copy_tls(unsigned char * mem)
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{
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	/**
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	 * this is always the simple case, since:
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	 * emutls is based on PE named sections; and
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	 * tls allocation and initialization are handled by clone(2)
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	**/
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        pthread_t td;
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	uintptr_t addr;
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	addr = (uintptr_t)mem;
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	addr >>= 4;
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	addr <<= 4;
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	addr +=  16;
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	td = (struct __pthread *)addr;
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	td->dtv = 0;
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	return td;
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}
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weak_alias(__dlsym,dlsym);
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weak_alias(__dladdr,dladdr);
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weak_alias(__dlinfo,dlinfo);