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-rw-r--r--libc/misc/internals/Makefile.in1
-rw-r--r--libc/misc/internals/reloc_static_pie.c47
2 files changed, 48 insertions, 0 deletions
diff --git a/libc/misc/internals/Makefile.in b/libc/misc/internals/Makefile.in
index a8e4e36f9..4a6e73d2d 100644
--- a/libc/misc/internals/Makefile.in
+++ b/libc/misc/internals/Makefile.in
@@ -34,6 +34,7 @@ libc-static-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += \
libc-static-$(UCLIBC_FORMAT_SHARED_FLAT) += \
$(MISC_INTERNALS_OUT)/shared_flat_initfini.o \
$(MISC_INTERNALS_OUT)/shared_flat_add_library.o
+libc-static-$(STATIC_PIE) += $(MISC_INTERNALS_OUT)/reloc_static_pie.o
libc-shared-$(UCLIBC_FORMAT_SHARED_FLAT) += \
$(MISC_INTERNALS_OUT)/shared_flat_initfini.os \
$(MISC_INTERNALS_OUT)/shared_flat_add_library.os
diff --git a/libc/misc/internals/reloc_static_pie.c b/libc/misc/internals/reloc_static_pie.c
new file mode 100644
index 000000000..578202d23
--- /dev/null
+++ b/libc/misc/internals/reloc_static_pie.c
@@ -0,0 +1,47 @@
+/* Support for relocating static PIE.
+ Copyright (C) 2017-2022 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <link.h>
+#include <elf.h>
+#include <dl-elf.h>
+
+ElfW(Addr) _dl_load_base = NULL;
+
+void
+reloc_static_pie (ElfW(Addr) load_addr);
+
+void
+reloc_static_pie (ElfW(Addr) load_addr)
+{
+ ElfW(Word) relative_count = 0;
+ ElfW(Addr) rel_addr = 0;
+ ElfW(Dyn) * dyn_addr = NULL;
+ unsigned long dynamic_info[DYNAMIC_SIZE] = {0};
+
+ /* Read our own dynamic section and fill in the info array. */
+ dyn_addr = ((void *) load_addr + elf_machine_dynamic ());
+
+ /* Use the underlying function to avoid TLS access before initialization */
+ __dl_parse_dynamic_info(dyn_addr, dynamic_info, NULL, load_addr);
+
+ /* Perform relocations */
+ relative_count = dynamic_info[DT_RELCONT_IDX];
+ rel_addr = dynamic_info[DT_RELOC_TABLE_ADDR];
+ elf_machine_relative(load_addr, rel_addr, relative_count);
+ _dl_load_base = load_addr;
+}