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authorChristophe Lyon <christophe.lyon@st.com>2018-03-20 10:55:29 +0100
committerChristophe Lyon <christophe.lyon@linaro.org>2018-04-25 20:57:02 +0000
commit5c5a4843ec385a60954fbbc4bcf5b64763639bd3 (patch)
tree0271d460bc3533d64c2bcc94b3e01925d7fbbe19 /ld
parent7801f98f84fefa495941c86e2a859ea8c6c37770 (diff)
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[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/ChangeLog5
-rw-r--r--ld/scripttempl/elf.sc6
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}}