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| author | Christophe Lyon <christophe.lyon@st.com> | 2018-03-20 10:55:29 +0100 |
|---|---|---|
| committer | Christophe Lyon <christophe.lyon@linaro.org> | 2018-04-25 20:57:02 +0000 |
| commit | 5c5a4843ec385a60954fbbc4bcf5b64763639bd3 (patch) | |
| tree | 0271d460bc3533d64c2bcc94b3e01925d7fbbe19 /ld | |
| parent | 7801f98f84fefa495941c86e2a859ea8c6c37770 (diff) | |
| download | gdb-5c5a4843ec385a60954fbbc4bcf5b64763639bd3.zip gdb-5c5a4843ec385a60954fbbc4bcf5b64763639bd3.tar.gz gdb-5c5a4843ec385a60954fbbc4bcf5b64763639bd3.tar.bz2 | |
[ARM] Add TLS relocations for FDPIC.
Define and handle TLS relocations for FDPIC in BFD and gas.
In gas, the new relocations are rejected if the --fdpic option was not
specified.
We also define the __tdata_start symbol to mark the start of the
.tdata section. This allows FDPIC static binaries to find the start of
.tdata section, since phdr->p_vaddr of TLS segment is not a valid
value for FDPIC.
2018-04-25 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
bfd/:
* bfd-in2.h (BFD_RELOC_ARM_TLS_GD32_FDPIC)
(BFD_RELOC_ARM_TLS_LDM32_FDPIC, BFD_RELOC_ARM_TLS_IE32_FDPIC): New
relocations.
* elf32-arm.c (elf32_arm_howto_table_2): Add R_ARM_TLS_GD32_FDPIC,
R_ARM_TLS_LDM32_FDPIC, R_ARM_TLS_IE32_FDPIC relocations.
(elf32_arm_reloc_map): Add R_ARM_TLS_GD32_FDPIC,
R_ARM_TLS_LDM32_FDPIC, R_ARM_TLS_IE32_FDPIC.
(struct elf32_arm_link_hash_table): Update comment.
(elf32_arm_final_link_relocate): Handle TLS FDPIC relocations.
(IS_ARM_TLS_RELOC): Likewise.
(elf32_arm_check_relocs): Likewise.
(allocate_dynrelocs_for_symbol): Likewise.
(elf32_arm_size_dynamic_sections): Update comment.
* reloc.c: Add BFD_RELOC_ARM_TLS_GD32_FDPIC,
BFD_RELOC_ARM_TLS_LDM32_FDPIC, BFD_RELOC_ARM_TLS_IE32_FDPIC.
gas/
* config/tc-arm.c (reloc_names): Add TLSGD_FDPIC, TLSLDM_FDPIC,
GOTTPOFF_FDIC relocations.
(md_apply_fix): Handle the new TLS FDPIC relocations.
(tc_gen_reloc): Likewise.
(arm_fix_adjustable): Likewise.
include/
* elf/arm.h: Add R_ARM_TLS_GD32_FDPIC, R_ARM_TLS_LDM32_FDPIC,
R_ARM_TLS_IE32_FDPIC.
ld/
* scripttempl/elf.sc: Define __tdata_start for .tdata section.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/ChangeLog | 5 | ||||
| -rw-r--r-- | ld/scripttempl/elf.sc | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog index d9900b5..30de4cb 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,6 +1,11 @@ 2018-04-25 Christophe Lyon <christophe.lyon@st.com> Mickaël Guêné <mickael.guene@st.com> + * scripttempl/elf.sc: Define __tdata_start for .tdata section. + +2018-04-25 Christophe Lyon <christophe.lyon@st.com> + Mickaël Guêné <mickael.guene@st.com> + * emulparams/armelf_linux_fdpiceabi.sh: Add .rofixup section. 2018-04-25 Christophe Lyon <christophe.lyon@st.com> diff --git a/ld/scripttempl/elf.sc b/ld/scripttempl/elf.sc index 9787ab5..5ccdd41 100644 --- a/ld/scripttempl/elf.sc +++ b/ld/scripttempl/elf.sc @@ -587,7 +587,11 @@ cat <<EOF .exception_ranges ${RELOCATING-0} : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) } /* Thread Local Storage sections */ - .tdata ${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } + .tdata ${RELOCATING-0} : + { + ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__tdata_start = .);}} + *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) + } .tbss ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } ${RELOCATING+${PREINIT_ARRAY}} |