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 /libpthread/nptl/sysdeps/generic/libc-tls.c | |
| 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 'libpthread/nptl/sysdeps/generic/libc-tls.c')
| -rw-r--r-- | libpthread/nptl/sysdeps/generic/libc-tls.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/generic/libc-tls.c b/libpthread/nptl/sysdeps/generic/libc-tls.c index d746c9a38..0c8c558d0 100644 --- a/libpthread/nptl/sysdeps/generic/libc-tls.c +++ b/libpthread/nptl/sysdeps/generic/libc-tls.c @@ -142,6 +142,10 @@ __libc_setup_tls (size_t tcbsize, size_t tcbalign) initimage = (void *) &__tdata_start; #else initimage = (void *) phdr->p_vaddr; +#if !defined(SHARED) && defined(STATIC_PIE) + extern ElfW(Addr) _dl_load_base; + initimage += _dl_load_base; +#endif #endif align = phdr->p_align; if (phdr->p_align > max_align) |