[src/netbsd-9]: src Pull up following revision(s) (requested by nakayama in t...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d7e3263789aa
branches:  netbsd-9
changeset: 843582:d7e3263789aa
user:      martin <martin%NetBSD.org@localhost>
date:      Tue Nov 26 08:12:26 2019 +0000

description:
Pull up following revision(s) (requested by nakayama in ticket #469):

        lib/libc/tls/tls.c: revision 1.10
        lib/libc/tls/tls.c: revision 1.11
        lib/libc/tls/tls.c: revision 1.12
        lib/libc/tls/tls.c: revision 1.13
        libexec/ld.elf_so/tls.c: revision 1.13
        libexec/ld.elf_so/tls.c: revision 1.14
        libexec/ld.elf_so/Makefile: revision 1.142
        lib/libc/tls/Makefile.inc: revision 1.3
        usr.bin/ldd/Makefile.elf: revision 1.6

PR 54093: Align static TLS area to max_align_t.
Use alignof and not size_t for platforms with non-natural base
alignments.

Mirror the ld.elf_so logic for handling aligning the TLS size.
Most noticable, recompute the start of the TLS area for variant I
relative to the TCB. This makes a difference when the segment size and
base alignment don't agree.

Fix PR/54074 and PR/54093 completely.
More similar to the ld.elf_so logic, it is necessary to align with
p_align first.  Also, invert the #ifdef condition for consistency.

Should fix regression for static linking binaries:
http://releng.netbsd.org/b5reports/sparc/commits-2019.11.html#2019.11.10.23.39.03
http://releng.netbsd.org/b5reports/sparc64/commits-2019.11.html#2019.11.16.04.10.33

diffstat:

 lib/libc/tls/Makefile.inc  |   4 ++--
 lib/libc/tls/tls.c         |  30 +++++++++++++++++++-----------
 libexec/ld.elf_so/Makefile |   3 ++-
 libexec/ld.elf_so/tls.c    |   8 +++++---
 usr.bin/ldd/Makefile.elf   |   4 +++-
 5 files changed, 31 insertions(+), 18 deletions(-)

diffs (166 lines):

diff -r ae6617a3c5f4 -r d7e3263789aa lib/libc/tls/Makefile.inc
--- a/lib/libc/tls/Makefile.inc Mon Nov 25 20:47:24 2019 +0000
+++ b/lib/libc/tls/Makefile.inc Tue Nov 26 08:12:26 2019 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile.inc,v 1.2 2011/03/12 07:55:09 matt Exp $
+#      $NetBSD: Makefile.inc,v 1.2.46.1 2019/11/26 08:12:26 martin Exp $
 
 .include <bsd.own.mk>
 
@@ -6,4 +6,4 @@
 .PATH: ${.PARSEDIR} ${ARCHDIR}/tls
 
 SRCS+=                 tls.c
-CPPFLAGS.tls.c+=       -D_LIBC_SOURCE
+CPPFLAGS.tls.c+=       -D_LIBC_SOURCE -std=gnu11
diff -r ae6617a3c5f4 -r d7e3263789aa lib/libc/tls/tls.c
--- a/lib/libc/tls/tls.c        Mon Nov 25 20:47:24 2019 +0000
+++ b/lib/libc/tls/tls.c        Tue Nov 26 08:12:26 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tls.c,v 1.9 2018/07/13 19:50:21 joerg Exp $    */
+/*     $NetBSD: tls.c,v 1.9.2.1 2019/11/26 08:12:26 martin Exp $       */
 
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: tls.c,v 1.9 2018/07/13 19:50:21 joerg Exp $");
+__RCSID("$NetBSD: tls.c,v 1.9.2.1 2019/11/26 08:12:26 martin Exp $");
 
 #include "namespace.h"
 
@@ -46,6 +46,7 @@
 #include <link_elf.h>
 #include <lwp.h>
 #include <stdbool.h>
+#include <stdalign.h>
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
@@ -84,15 +85,17 @@
        uint8_t *p;
 
        if (initial_thread_tcb == NULL) {
-#ifdef __HAVE_TLS_VARIANT_II
-               tls_size = roundup2(tls_size, sizeof(void *));
+#ifdef __HAVE_TLS_VARIANT_I
+               tls_allocation = tls_size;
+#else
+               tls_allocation = roundup2(tls_size, alignof(max_align_t));
 #endif
-               tls_allocation = tls_size + sizeof(*tcb);
 
-               initial_thread_tcb = p = mmap(NULL, tls_allocation,
-                   PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
+               initial_thread_tcb = p = mmap(NULL,
+                   tls_allocation + sizeof(*tcb), PROT_READ | PROT_WRITE,
+                   MAP_ANON, -1, 0);
        } else {
-               p = calloc(1, tls_allocation);
+               p = calloc(1, tls_allocation + sizeof(*tcb));
        }
        if (p == NULL) {
                static const char msg[] =  "TLS allocation failed, terminating\n";
@@ -105,7 +108,8 @@
        p += sizeof(struct tls_tcb);
 #else
        /* LINTED tls_size is rounded above */
-       tcb = (struct tls_tcb *)(p + tls_size);
+       tcb = (struct tls_tcb *)(p + tls_allocation);
+       p = (uint8_t *)tcb - tls_size;
        tcb->tcb_self = tcb;
 #endif
        memcpy(p, tls_initaddr, tls_initsize);
@@ -125,10 +129,10 @@
        p = (uint8_t *)tcb;
 #else
        /* LINTED */
-       p = (uint8_t *)tcb - tls_size;
+       p = (uint8_t *)tcb - tls_allocation;
 #endif
        if (p == initial_thread_tcb)
-               munmap(p, tls_allocation);
+               munmap(p, tls_allocation + sizeof(*tcb));
        else
                free(p);
 }
@@ -148,7 +152,11 @@
                        continue;
                tls_initaddr = (void *)(phdr->p_vaddr + data->dlpi_addr);
                tls_initsize = phdr->p_filesz;
+#ifdef __HAVE_TLS_VARIANT_I
                tls_size = phdr->p_memsz;
+#else
+               tls_size = roundup2(phdr->p_memsz, phdr->p_align);
+#endif
        }
        return 0;
 }
diff -r ae6617a3c5f4 -r d7e3263789aa libexec/ld.elf_so/Makefile
--- a/libexec/ld.elf_so/Makefile        Mon Nov 25 20:47:24 2019 +0000
+++ b/libexec/ld.elf_so/Makefile        Tue Nov 26 08:12:26 2019 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile,v 1.141 2019/04/03 21:37:58 christos Exp $
+#      $NetBSD: Makefile,v 1.141.2.1 2019/11/26 08:12:26 martin Exp $
 #
 # NOTE: when changing ld.so, ensure that ldd still compiles.
 #
@@ -92,6 +92,7 @@
 
 BINDIR=                ${SHLINKINSTALLDIR}
 
+CPPFLAGS.tls.c+=       -std=gnu11
 CPPFLAGS+=     -DLIBDIR=\"${LIBDIR}\" -D_PATH_RTLD=\"${BINDIR}/${PROG}\"
 CPPFLAGS+=     -I${.CURDIR} -I. -D_KERNTYPES
 CPPFLAGS+=     -DRTLD_LOADER
diff -r ae6617a3c5f4 -r d7e3263789aa libexec/ld.elf_so/tls.c
--- a/libexec/ld.elf_so/tls.c   Mon Nov 25 20:47:24 2019 +0000
+++ b/libexec/ld.elf_so/tls.c   Tue Nov 26 08:12:26 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tls.c,v 1.12 2019/04/13 00:23:32 rin Exp $     */
+/*     $NetBSD: tls.c,v 1.12.2.1 2019/11/26 08:12:26 martin Exp $      */
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -29,11 +29,13 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: tls.c,v 1.12 2019/04/13 00:23:32 rin Exp $");
+__RCSID("$NetBSD: tls.c,v 1.12.2.1 2019/11/26 08:12:26 martin Exp $");
 
 #include <sys/param.h>
 #include <sys/ucontext.h>
 #include <lwp.h>
+#include <stdalign.h>
+#include <stddef.h>
 #include <string.h>
 #include "debug.h"
 #include "rtld.h"
@@ -99,7 +101,7 @@
 
 #ifndef __HAVE_TLS_VARIANT_I
        _rtld_tls_static_space = roundup2(_rtld_tls_static_space,
-           sizeof(void *));
+           alignof(max_align_t));
 #endif
        dbg(("_rtld_tls_static_space %zu", _rtld_tls_static_space));
 
diff -r ae6617a3c5f4 -r d7e3263789aa usr.bin/ldd/Makefile.elf
--- a/usr.bin/ldd/Makefile.elf  Mon Nov 25 20:47:24 2019 +0000
+++ b/usr.bin/ldd/Makefile.elf  Tue Nov 26 08:12:26 2019 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile.elf,v 1.5 2013/05/07 13:00:35 christos Exp $
+#      $NetBSD: Makefile.elf,v 1.5.30.1 2019/11/26 08:12:27 martin Exp $
 
 # Makefile fragment to build a (32 or 64 bit) libldd_elfxx.a.
 # Expects CPPFLAGS to have ELFSIZE set, and LIB to be set.
@@ -7,4 +7,6 @@
 SRCS+= xmalloc.c debug.c expand.c map_object.c load.c search.c \
        headers.c paths.c tls.c symver.c
 
+CPPFLAGS.tls.c+=       -std=gnu11
+
 .include "Makefile.common"