#include <dlfcn.h>
#include "pthread_impl.h"
#include "libc.h"
-#undef libc
static int errflag;
static char errbuf[128];
void __init_ssp(size_t *);
void *__install_initial_tls(void *);
-static struct dso *head, *tail, *libc, *fini_head;
+static struct dso *head, *tail, *ldso, *fini_head;
static char *env_path, *sys_path, *r_path;
static int ssp_used;
static int runtime;
static pthread_rwlock_t lock;
static struct debug debug;
static size_t *auxv;
-static size_t tls_cnt, tls_offset, tls_start, tls_align = 4*sizeof(size_t);
+static size_t tls_cnt, tls_offset, tls_align = 4*sizeof(size_t);
static pthread_mutex_t init_fini_lock = { ._m_type = PTHREAD_MUTEX_RECURSIVE };
struct debug *_dl_debug_addr = &debug;
size_t l = z-name;
for (rp=reserved; *rp && memcmp(name+3, rp, l-3); rp+=strlen(rp)+1);
if (*rp) {
- if (!libc->prev) {
- tail->next = libc;
- libc->prev = tail;
- tail = libc->next ? libc->next : libc;
+ if (!ldso->prev) {
+ tail->next = ldso;
+ ldso->prev = tail;
+ tail = ldso->next ? ldso->next : ldso;
}
- return libc;
+ return ldso;
}
}
}
if (runtime && temp_dso.tls_image) {
size_t per_th = temp_dso.tls_size + temp_dso.tls_align
+ sizeof(void *) * (tls_cnt+3);
- n_th = __libc.threads_minus_1 + 1;
+ n_th = libc.threads_minus_1 + 1;
if (n_th > SSIZE_MAX / per_th) alloc_size = SIZE_MAX;
else alloc_size += n_th * per_th;
}
}
p->tls_id = ++tls_cnt;
tls_align = MAXP2(tls_align, p->tls_align);
+#ifdef TLS_ABOVE_TP
+ p->tls_offset = tls_offset + ( (tls_align-1) &
+ -(tls_offset + (uintptr_t)p->tls_image) );
+ tls_offset += p->tls_size;
+#else
tls_offset += p->tls_size + p->tls_align - 1;
tls_offset -= (tls_offset + (uintptr_t)p->tls_image)
& (p->tls_align-1);
p->tls_offset = tls_offset;
+#endif
p->new_dtv = (void *)(-sizeof(size_t) &
(uintptr_t)(p->name+strlen(p->name)+sizeof(size_t)));
p->new_tls = (void *)(p->new_dtv + n_th*(tls_cnt+1));
static void do_init_fini(struct dso *p)
{
size_t dyn[DYN_CNT] = {0};
- int need_locking = __libc.threads_minus_1;
+ int need_locking = libc.threads_minus_1;
/* Allow recursive calls that arise when a library calls
* dlopen from one of its constructors, but block any
* other threads until all ctors have finished. */
void **dtv = (void *)mem;
dtv[0] = (void *)tls_cnt;
- mem += __libc.tls_size - sizeof(struct pthread);
+#ifdef TLS_ABOVE_TP
+ mem += sizeof(void *) * (tls_cnt+1);
+ mem += -((uintptr_t)mem + sizeof(struct pthread)) & (tls_align-1);
+ td = (pthread_t)mem;
+ mem += sizeof(struct pthread);
+
+ for (p=head; p; p=p->next) {
+ if (!p->tls_id) continue;
+ dtv[p->tls_id] = mem + p->tls_offset;
+ memcpy(dtv[p->tls_id], p->tls_image, p->tls_len);
+ }
+#else
+ mem += libc.tls_size - sizeof(struct pthread);
mem -= (uintptr_t)mem & (tls_align-1);
- mem -= tls_start;
td = (pthread_t)mem;
for (p=head; p; p=p->next) {
dtv[p->tls_id] = mem - p->tls_offset;
memcpy(dtv[p->tls_id], p->tls_image, p->tls_len);
}
+#endif
td->dtv = dtv;
return td;
}
static void update_tls_size()
{
- size_t below_tp = (1+tls_cnt) * sizeof(void *) + tls_offset;
- size_t above_tp = sizeof(struct pthread) + tls_start + tls_align;
- __libc.tls_size = ALIGN(below_tp + above_tp, tls_align);
+ libc.tls_size = ALIGN(
+ (1+tls_cnt) * sizeof(void *) +
+ tls_offset +
+ sizeof(struct pthread) +
+ tls_align * 2,
+ tls_align);
}
void *__dynlink(int argc, char **argv)
}
if (app->tls_size) {
app->tls_id = tls_cnt = 1;
- tls_offset = app->tls_offset = app->tls_size;
- tls_start = -((uintptr_t)app->tls_image + app->tls_size)
- & (app->tls_align-1);
+#ifdef TLS_ABOVE_TP
+ app->tls_offset = 0;
+ tls_offset = app->tls_size
+ + ( -((uintptr_t)app->tls_image + app->tls_size)
+ & (app->tls_align-1) );
+#else
+ tls_offset = app->tls_offset = app->tls_size
+ + ( -((uintptr_t)app->tls_image + app->tls_size)
+ & (app->tls_align-1) );
+#endif
tls_align = MAXP2(tls_align, app->tls_align);
}
app->global = 1;
* restore the initial chain in preparation for loading third
* party libraries (preload/needed). */
head = tail = app;
- libc = lib;
+ ldso = lib;
app->next = lib;
reloc_all(lib);
app->next = 0;
update_tls_size();
if (tls_cnt) {
struct dso *p;
- void *mem = mmap(0, __libc.tls_size, PROT_READ|PROT_WRITE,
+ void *mem = mmap(0, libc.tls_size, PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
if (mem==MAP_FAILED ||
!__install_initial_tls(__copy_tls(mem))) {
dprintf(2, "%s: Error getting %zu bytes thread-local storage: %m\n",
- argv[0], __libc.tls_size);
+ argv[0], libc.tls_size);
_exit(127);
}
}
uint32_t h = 0, gh = 0;
Sym *sym;
if (p == head || p == RTLD_DEFAULT || p == RTLD_NEXT) {
- if (p == RTLD_NEXT) {
+ if (p == RTLD_DEFAULT) {
+ p = head;
+ } else if (p == RTLD_NEXT) {
for (p=head; p && (unsigned char *)ra-p->map>p->map_len; p=p->next);
if (!p) p=head;
+ p = p->next;
}
- struct symdef def = find_sym(p->next, s, 0);
+ struct symdef def = find_sym(p, s, 0);
if (!def.sym) goto failed;
+ if ((def.sym->st_info&0xf) == STT_TLS)
+ return __tls_get_addr((size_t []){def.dso->tls_id, def.sym->st_value});
return def.dso->base + def.sym->st_value;
}
if (p->ghashtab) {
h = sysv_hash(s);
sym = sysv_lookup(s, h, p);
}
+ if (sym && (sym->st_info&0xf) == STT_TLS)
+ return __tls_get_addr((size_t []){p->tls_id, sym->st_value});
if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))
return p->base + sym->st_value;
if (p->deps) for (i=0; p->deps[i]; i++) {
if (!h) h = sysv_hash(s);
sym = sysv_lookup(s, h, p->deps[i]);
}
+ if (sym && (sym->st_info&0xf) == STT_TLS)
+ return __tls_get_addr((size_t []){p->deps[i]->tls_id, sym->st_value});
if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))
return p->deps[i]->base + sym->st_value;
}
projects / musl / blobdiff