diff options
| author | Christophe Lyon <christophe.lyon@st.com> | 2013-01-18 15:08:04 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbrodkorb@conet.de> | 2018-08-10 16:01:58 +0200 |
| commit | 5ec586eb37f61e57f19ac60b58af61f167ca054a (patch) | |
| tree | 6c72d03d43e76a33eb5d6360d9bdb2573a048c42 /ldso/include | |
| parent | f88bb681ba22d77a19abfb4c1617c826298ed473 (diff) | |
rtld: Add FDPIC code for arm
Add FDPIC dynamic relocations support, similar to what other FDPIC
targets do.
Lazy binding is implemented in a folllow-up patch.
Disable the SEND* macros because they involve relocations to
access constant strings that are unsupported by the existing
arm version.
Define DL_START, START, ARCH_NEEDS_BOOTSTRAP_RELOCS,
DL_CHECK_LIB_TYPE similarly to what other FDPIC targets do.
Define raise() because _dl_find_hash references __aeabi_uidivmod,
which uses __aeabi_idiv0 which in turn references raise.
* include/elf.h (R_ARM_FUNCDESC): Define.
(R_ARM_FUNCDESC_VALUE): Define.
* ldso/include/dl-string.h (SEND_STDERR, SEND_ADDRESS_STDERR)
(SEND_NUMBER_STDERR): Define empty for __FDPIC__.
* ldso/ldso/arm/dl-inlines.h: New file.
* ldso/ldso/arm/dl-startup.h (PERFORM_BOOTSTRAP_RELOC): Fix type
of load_addr. Fix handling of R_ARM_RELATIVE, add support for
R_ARM_FUNCDESC_VALUE.
(DL_START, START): Define for __FDPIC__.
(raise): Define.
* ldso/ldso/arm/dl-sysdep.h (ARCH_NEEDS_BOOTSTRAP_RELOCS): Define.
(DL_CHECK_LIB_TYPE): Define.
(elf_machine_type_class): Take into account FDPIC related
relocations.
(elf_machine_load_address): Support __FDPIC__.
(elf_machine_relative): Likewise.
* ldso/ldso/arm/elfinterp.c (_dl_linux_resolver): Dummy support
for __FDPIC__, implemented in a later patch.
(_dl_do_reloc): Fix reloc_adr computation for __FDPIC__, fix
handling of local symbols. Fix handling of R_ARM_RELATIVE, add
support for R_ARM_FUNCDESC_VALUE, R_ARM_FUNCDESC.
* ldso/ldso/arm/resolve.S: Make _dl_linux_resolve hidden.
* ldso/ldso/fdpic/dl-inlines.h (htab_delete): Declare.
* libc/sysdeps/linux/arm/bits/elf-fdpic.h: New file, similar to bfin's.
* libc/sysdeps/linux/arm/crtreloc.c: Likewise.
* libc/sysdeps/linux/arm/find_exidx.c (__dl_addr_in_loadaddr) Define.
(find_exidx_callback): Support __FDPIC__.
Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Diffstat (limited to 'ldso/include')
| -rw-r--r-- | ldso/include/dl-string.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/ldso/include/dl-string.h b/ldso/include/dl-string.h index fc1d1fccd..bf6997188 100644 --- a/ldso/include/dl-string.h +++ b/ldso/include/dl-string.h @@ -256,7 +256,8 @@ static __always_inline char * _dl_simple_ltoahex(char *local, unsigned long i) /* On some (wierd) arches, none of this stuff works at all, so * disable the whole lot... */ -#if defined(__mips__) +/* The same applies for ARM FDPIC at least for the moment. */ +#if defined(__mips__) || (__FDPIC__) # define SEND_STDERR(X) # define SEND_ADDRESS_STDERR(X, add_a_newline) |