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authorlinted <linted@users.noreply.github.com>2022-07-23 16:25:41 -0400
committerWaldemar Brodkorb <wbx@openadk.org>2022-07-26 09:56:03 +0200
commit2c58afdb3ae6f900583cf7264cba6ab8a797e3e2 (patch)
treeabb641e31fcab71a4e78905fd0124ca8b9a25eae /extra/Configs
parent01961b12bc71d6eb4d9bda3632d73bb6764b8e85 (diff)
Added support for creation of Static Position-Independent Executables (PIE) on i386, x86_64, and arm.
This patch adds the generation of rcrt1.o which is used by gcc when compiling with the --static-pie flag. rcrt1.o differs from crt1.o and Scrt1.o in that it the executable has a dynamic section but no relocations have been performed prior to _start being called. crt1.o assumes there to be no dynamic relocations, and Scrt1.o has all relocations performed prior to execution by lsdo. The new reloc_static_pie function handles parsing the dynamic section, and performing the relocations in a architecture agnostic method. It also sets _dl_load_base which is used when initalizing TLS to ensure loading from the proper location. This allows for easier porting of static-pie support to additional architectures as only modifications to crt1.S to find the load address are required. Signed-off-by: linted <linted@users.noreply.github.com>
Diffstat (limited to 'extra/Configs')
-rw-r--r--extra/Configs/Config.in5
1 files changed, 5 insertions, 0 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index a58ceb265..a49278b30 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -301,6 +301,11 @@ config DOPIC
If you wish to build all of uClibc as PIC objects, then answer Y here.
If you are unsure, then you should answer N.
+config STATIC_PIE
+ bool "Add support for Static Position Independent Executables (PIE)"
+ default n
+ depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && (TARGET_arm || TARGET_i386 || TARGET_x86_64)
+
config ARCH_HAS_NO_SHARED
bool