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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-08-24 04:37:45 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-08-24 04:38:02 -0700 |
| commit | aa7bca9b2e30cf128966631382731369f7b753d8 (patch) | |
| tree | 2127751d26ed050e8da1dbf984f3240534f21e23 /include | |
| parent | 772758ac42a5717d2c2043cc36aa6600c2bfc120 (diff) | |
| download | gdb-aa7bca9b2e30cf128966631382731369f7b753d8.zip gdb-aa7bca9b2e30cf128966631382731369f7b753d8.tar.gz gdb-aa7bca9b2e30cf128966631382731369f7b753d8.tar.bz2 | |
x86: Add GNU_PROPERTY_X86_UINT32_VALID
The older linker treats .note.gnu.property section as a generic note
and just concatenates all .note.gnu.property sections from the input
to the output. On CET-enabled OS, the output of the older linker is
marked as CET enabled, but in fact, it is not CET enabled and it crashes
on CET-enabled machines.
This patch defines GNU_PROPERTY_X86_UINT32_VALID. Linker is updated to
set the GNU_PROPERTY_X86_UINT32_VALID bit in GNU property note for
non-relocatable output to differentiate outputs from the older linker.
bfd/
* elfxx-x86.c (_bfd_x86_elf_parse_gnu_properties): Mask out the
GNU_PROPERTY_X86_UINT32_VALID bit.
(_bfd_x86_elf_link_fixup_gnu_properties): Set the
GNU_PROPERTY_X86_UINT32_VALID bit for non-relocatable output.
binutils/
* readelf.c (print_gnu_property_note): Check the
GNU_PROPERTY_X86_UINT32_VALID bit for invalid GNU property note.
include/
* elf/common.h (GNU_PROPERTY_X86_UINT32_VALID): New.
Diffstat (limited to 'include')
| -rw-r--r-- | include/ChangeLog | 4 | ||||
| -rw-r--r-- | include/elf/common.h | 3 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index 69cc57d..4b933b1 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,7 @@ +2018-08-24 H.J. Lu <hongjiu.lu@intel.com> + + * elf/common.h (GNU_PROPERTY_X86_UINT32_VALID): New. + 2018-08-21 John Darrington <john@darrington.wattle.id.au> * elf/s12z.h: Rename R_S12Z_UKNWN_3 to R_S12Z_EXT18. diff --git a/include/elf/common.h b/include/elf/common.h index 1a940ff..55c5505 100644 --- a/include/elf/common.h +++ b/include/elf/common.h @@ -752,6 +752,9 @@ #define GNU_PROPERTY_X86_ISA_1_NEEDED 0xc0000001 #define GNU_PROPERTY_X86_FEATURE_1_AND 0xc0000002 +/* Set by linker to indicate that the property is valid. */ +#define GNU_PROPERTY_X86_UINT32_VALID (1U << 31) + #define GNU_PROPERTY_X86_ISA_1_486 (1U << 0) #define GNU_PROPERTY_X86_ISA_1_586 (1U << 1) #define GNU_PROPERTY_X86_ISA_1_686 (1U << 2) |