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/**************************************************************************/
/* mmglue: midipix architecture- and target-specific bits for musl libc */
/* Copyright (C) 2013--2023 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.MMGLUE. */
/**************************************************************************/
#define _BSD_SOURCE
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include "psxglue.h"
#include "pthread_impl.h"
extern const struct __ldso_vtbl * __ldso_vtbl;
extern const struct __psx_vtbl * __psx_vtbl;
static pthread_rwlock_t __ldso_lock;
void * dlopen(const char * file, int mode)
{
int status;
void * base;
int cs;
char * ch;
char * next;
char * epath;
char * lpath;
const char ** lpathv;
const char ** epathv;
char lpathbuf[2048];
const char * lpathvbuf[64];
int i;
/* prolog */
if (!file)
return __ldso_vtbl->dlopen(0,mode,0,&status);
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
pthread_rwlock_wrlock(&__ldso_lock);
__inhibit_ptc();
/* loader path environment variable to loader path vector */
if ((epath = getenv("LD_LIBRARY_PATH"))) {
lpath = (strncpy(lpathbuf,epath,2048) < &lpathbuf[2048])
? lpathbuf
: strdup(epath);
if ((i = !!lpath))
for (ch=lpath; *ch; ch++)
if (*ch == ':')
i++;
lpathv = (++i < 64)
? lpathvbuf
: calloc(++i,sizeof(char *));
} else {
lpath = lpathbuf;
lpathv = lpathvbuf;
lpath[0] = 0;
}
if (lpath && lpathv) {
ch = lpath;
next = *ch ? ch : 0;
epathv = lpathv;
for (; next; ) {
*epathv++ = (*next == ':')
? "."
: next;
ch = &next[1];
for (; *ch; ) {
if (*ch == ':') {
*ch = 0;
ch = 0;
} else {
ch++;
}
}
next = *ch ? ch : 0;
}
*epathv = 0;
}
/* dlopen */
base = (lpath && lpathv)
? __ldso_vtbl->dlopen(file,mode,lpathv,&status)
: 0;
/* epilog */
if (lpath && (lpath != lpathbuf))
free(lpath);
if (lpathv && (lpathv != lpathvbuf))
free(lpathv);
__release_ptc();
pthread_rwlock_unlock(&__ldso_lock);
if (base)
__psx_vtbl->do_global_ctors_fn();
pthread_setcancelstate(cs, 0);
return base;
}
void * __dldopen(int fd, int mode)
{
int status;
void * base;
int cs;
/* prolog */
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
pthread_rwlock_wrlock(&__ldso_lock);
__inhibit_ptc();
/* dldopen */
base = __ldso_vtbl->dldopen(fd,mode,&status);
/* epilog */
__release_ptc();
pthread_rwlock_unlock(&__ldso_lock);
if (base)
__psx_vtbl->do_global_ctors_fn();
pthread_setcancelstate(cs, 0);
return base;
}
void * __dlsopen(const char * file, int mode)
{
int status;
void * base;
int cs;
/* prolog */
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
pthread_rwlock_wrlock(&__ldso_lock);
__inhibit_ptc();
/* dlsopen */
base = __ldso_vtbl->dlsopen(file,mode,&status);
/* epilog */
__release_ptc();
pthread_rwlock_unlock(&__ldso_lock);
if (base)
__psx_vtbl->do_global_ctors_fn();
pthread_setcancelstate(cs, 0);
return base;
}
int __dladdr(const void * addr, Dl_info * info)
{
return __ldso_vtbl->dladdr(addr,info);
}
int __dlinfo(void * dso, int req, void * res)
{
return (__ldso_vtbl->dlinfo(dso,req,res)) ? -1 : 0;
}
void *__dlsym(void * restrict p, const char * restrict s)
{
return __ldso_vtbl->dlsym(p,s,0);
}
int dlclose(void *p)
{
return __ldso_vtbl->dlclose(p);
}
char * dlerror(void)
{
return __ldso_vtbl->dlerror();
}
weak_alias(__dlsym,dlsym);
weak_alias(__dladdr,dladdr);
weak_alias(__dlinfo,dlinfo);
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