diff options
| author | linted <linted@users.noreply.github.com> | 2022-07-23 16:25:41 -0400 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2022-07-26 09:56:03 +0200 |
| commit | 2c58afdb3ae6f900583cf7264cba6ab8a797e3e2 (patch) | |
| tree | abb641e31fcab71a4e78905fd0124ca8b9a25eae /Makerules | |
| parent | 01961b12bc71d6eb4d9bda3632d73bb6764b8e85 (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 'Makerules')
| -rw-r--r-- | Makerules | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -405,8 +405,13 @@ else CRTS=$(top_builddir)lib/$(CRT).o endif +ifeq ($(STATIC_PIE),y) +CRTS+=$(top_builddir)lib/r$(CRT).o +endif + ASFLAGS-$(CRT).o := -DL_$(CRT) ASFLAGS-S$(CRT).o := $(PIEFLAG) -DL_S$(CRT) +ASFLAGS-r$(CRT).o := $(PIEFLAG) -DL_r$(CRT) $(CRTS): $(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)/$(CRT).S $(compile.S) $(Q)$(STRIPTOOL) -x -R .note -R .comment $@ |