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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-04-14 04:12:55 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-04-14 04:13:11 -0700 |
| commit | 889c2a67967f7047c245779a0a0fd8ba8796846e (patch) | |
| tree | c6b6b56e0438ab85f6f508a13ac5287ed113b395 /include | |
| parent | 887bddbcad907021f4cb98168cd51f2631e6cfc8 (diff) | |
| download | gdb-889c2a67967f7047c245779a0a0fd8ba8796846e.zip gdb-889c2a67967f7047c245779a0a0fd8ba8796846e.tar.gz gdb-889c2a67967f7047c245779a0a0fd8ba8796846e.tar.bz2 | |
Add -z noextern-protected-data to ld for ELF/x86
Address of protected data defined in the shared library may be external,
i.e., due to copy relocation. By default, linker backend checks if
relocations against protected data symbols are valid for building shared
library and issues an error if relocation isn't allowed. The new option
override linker backend default. When -z noextern-protected-data is used,
updates on protected data symbols by another module won't be visibile
to the resulting shared library. This option is specific to ELF/i386
and ELF/x86-64.
bfd/
PR ld/pr17709
* elflink.c (_bfd_elf_adjust_dynamic_copy): Check
info->extern_protected_data when warning copy relocs against
protected symbols.
(_bfd_elf_symbol_refs_local_p): Check info->extern_protected_data
when checking protected non-function symbols.
include/
PR ld/pr17709
* bfdlink.h (bfd_link_info): Add extern_protected_data.
ld/
PR ld/pr17709
* ld.texinfo: Document "-z noextern-protected-data".
* ldmain.c (main): Initialize link_info.extern_protected_data
to -1.
* lexsup.c (elf_shlib_list_options): Add
"-z [no]extern-protected-data".
* emulparams/elf32_x86_64.sh: Source extern_protected_data.sh.
* emulparams/elf_i386.sh: Likewise.
* emulparams/elf_i386_be.sh: Likewise.
* emulparams/elf_i386_chaos.sh: Likewise.
* emulparams/elf_i386_ldso.sh: Likewise.
* emulparams/elf_i386_vxworks.sh: Likewise.
* emulparams/elf_k1om.sh: Likewise.
* emulparams/elf_l1om.sh: Likewise.
* emulparams/elf_x86_64.sh: Source extern_protected_data.sh.
(PARSE_AND_LIST_OPTIONS): Renamed to ...
(PARSE_AND_LIST_OPTIONS_BNDPLT): This.
(PARSE_AND_LIST_ARGS_CASE_Z): Renamed to ...
(PARSE_AND_LIST_ARGS_CASE_Z_BNDPLT): This.
(PARSE_AND_LIST_OPTIONS): Append $PARSE_AND_LIST_OPTIONS_BNDPLT.
(PARSE_AND_LIST_ARGS_CASE_Z): Append
$PARSE_AND_LIST_ARGS_CASE_Z_BNDPLT.
* emulparams/extern_protected_data.sh: New file.
ld/testsuite/
PR ld/pr17709
* ld-i386/i386.exp: Run protected6b.
* ld-i386/protected6b.d: New file.
* ld-x86-64/protected6b.d: Likewise.
* ld-x86-64/x86-64.exp: Run protected6b.
Diffstat (limited to 'include')
| -rw-r--r-- | include/ChangeLog | 5 | ||||
| -rw-r--r-- | include/bfdlink.h | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index 35da015..7d4919d 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,8 @@ +2015-04-14 H.J. Lu <hongjiu.lu@intel.com> + + PR ld/pr17709 + * bfdlink.h (bfd_link_info): Add extern_protected_data. + 2015-03-10 Matthew Wahab <matthew.wahab@arm.com> PR ld/16572 diff --git a/include/bfdlink.h b/include/bfdlink.h index 6a02a3c..1b15826 100644 --- a/include/bfdlink.h +++ b/include/bfdlink.h @@ -517,6 +517,11 @@ struct bfd_link_info relaxation returning true in *AGAIN. */ int relax_trip; + /* > 0 to treat protected data defined in the shared library as + reference external. 0 to treat it as internal. -1 to let + backend to decide. */ + int extern_protected_data; + /* Non-zero if auto-import thunks for DATA items in pei386 DLLs should be generated/linked against. Set to 1 if this feature is explicitly requested by the user, -1 if enabled by default. */ |