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Determine dynamic binaries by presence of PT_INTERP. Static PIE has

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_DYNAMIC.
This commit is contained in:
joerg 2018-07-13 19:50:21 +00:00
parent bf395f73c9
commit 700ad9d05d
1 changed files with 10 additions and 8 deletions
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18
lib/libc/tls/tls.c
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@ -1,4 +1,4 @@
/* $NetBSD: tls.c,v 1.8 2014/12/14 23:49:17 chs Exp $ */
/* $NetBSD: tls.c,v 1.9 2018/07/13 19:50:21 joerg Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: tls.c,v 1.8 2014/12/14 23:49:17 chs Exp $");
__RCSID("$NetBSD: tls.c,v 1.9 2018/07/13 19:50:21 joerg Exp $");
#include "namespace.h"
@ -45,6 +45,7 @@ __RCSID("$NetBSD: tls.c,v 1.8 2014/12/14 23:49:17 chs Exp $");
#include <sys/mman.h>
#include <link_elf.h>
#include <lwp.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
@ -52,6 +53,7 @@ __RCSID("$NetBSD: tls.c,v 1.8 2014/12/14 23:49:17 chs Exp $");
__dso_hidden void __libc_static_tls_setup(void);
static bool is_dynamic;
static const void *tls_initaddr;
static size_t tls_initsize;
static size_t tls_size;
@ -131,8 +133,6 @@ _rtld_tls_free(struct tls_tcb *tcb)
free(p);
}
__weakref_visible int rtld_DYNAMIC __weak_reference(_DYNAMIC);
static int __section(".text.startup")
__libc_static_tls_setup_cb(struct dl_phdr_info *data, size_t len, void *cookie)
{
@ -140,6 +140,10 @@ __libc_static_tls_setup_cb(struct dl_phdr_info *data, size_t len, void *cookie)
const Elf_Phdr *phlimit = data->dlpi_phdr + data->dlpi_phnum;
for (; phdr < phlimit; ++phdr) {
if (phdr->p_type == PT_INTERP) {
is_dynamic = true;
return -1;
}
if (phdr->p_type != PT_TLS)
continue;
tls_initaddr = (void *)(phdr->p_vaddr + data->dlpi_addr);
@ -154,11 +158,9 @@ __libc_static_tls_setup(void)
{
struct tls_tcb *tcb;
if (&rtld_DYNAMIC != NULL) {
return;
}
dl_iterate_phdr(__libc_static_tls_setup_cb, NULL);
if (is_dynamic)
return;
tcb = _rtld_tls_allocate();
#ifdef __HAVE___LWP_SETTCB