From f787e138aa0bf677bf74fa2a08595c446292f3d7 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Mon, 16 May 2022 18:41:43 +0200 Subject: csu: Implement and use _dl_early_allocate during static startup This implements mmap fallback for a brk failure during TLS allocation. scripts/tls-elf-edit.py is updated to support the new patching method. The script no longer requires that in the input object is of ET_DYN type. Reviewed-by: Adhemerval Zanella --- elf/dl-early_allocate.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 elf/dl-early_allocate.c (limited to 'elf/dl-early_allocate.c') diff --git a/elf/dl-early_allocate.c b/elf/dl-early_allocate.c new file mode 100644 index 0000000000..61677aaa03 --- /dev/null +++ b/elf/dl-early_allocate.c @@ -0,0 +1,30 @@ +/* Early memory allocation for the dynamic loader. Generic version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include + +void * +_dl_early_allocate (size_t size) +{ + void *result = __sbrk (size); + if (result == (void *) -1) + result = NULL; + return result; +} -- cgit 1.4.1