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| author | Sudakshina Das <sudi.das@arm.com> | 2019-01-09 14:32:06 +0000 |
|---|---|---|
| committer | Sudakshina Das <sudi@gcc.gnu.org> | 2019-01-09 14:32:06 +0000 |
| commit | c7ff4f0fe6b9357393c7e44338c4783cf0c19759 (patch) | |
| tree | db02073be5558e36dbb273606c294c9de708594f /gcc/doc/install.texi | |
| parent | b5f794b47bc09930e3a05b64de0890d315631436 (diff) | |
| download | gcc-c7ff4f0fe6b9357393c7e44338c4783cf0c19759.zip gcc-c7ff4f0fe6b9357393c7e44338c4783cf0c19759.tar.gz gcc-c7ff4f0fe6b9357393c7e44338c4783cf0c19759.tar.bz2 | |
[AArch64, 6/6] Enable BTI: Add configure option.
This patch is part of a series that enables ARMv8.5-A in GCC and
adds Branch Target Identification Mechanism.
This patch is adding a new configure option for enabling BTI and
Return Address Signing by default.
*** gcc/ChangeLog ***
2018-01-09 Sudakshina Das <sudi.das@arm.com>
* config/aarch64/aarch64.c (aarch64_override_options): Add case to
check configure option to set BTI and Return Address Signing.
* configure.ac: Add --enable-standard-branch-protection and
--disable-standard-branch-protection.
* configure: Regenerated.
* doc/install.texi: Document the same.
*** gcc/testsuite/ChangeLog ***
2018-01-09 Sudakshina Das <sudi.das@arm.com>
* gcc.target/aarch64/bti-1.c: Update test to not add command line
option when configure with bti.
* gcc.target/aarch64/bti-2.c: Likewise.
* lib/target-supports.exp
(check_effective_target_default_branch_protection):
Add configure check for --enable-standard-branch-protection.
From-SVN: r267770
Diffstat (limited to 'gcc/doc/install.texi')
| -rw-r--r-- | gcc/doc/install.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index dd01e4c..d5e1edb 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -3413,6 +3413,16 @@ The workaround is disabled by default if neither of @option{--enable-fix-cortex-a53-843419} or @option{--disable-fix-cortex-a53-843419} is given at configure time. +To enable Branch Target Identification Mechanism and Return Address Signing by +default at configure time use the @option{--enable-standard-branch-protection} +option. This is equivalent to having @option{-mbranch-protection=standard} +during compilation. This can be explicitly disabled during compilation by +passing the @option{-mbranch-protection=none} option which turns off all +types of branch protections. Conversely, +@option{--disable-standard-branch-protection} will disable both the +protections by default. This mechanism is turned off by default if neither +of the options are given at configure time. + @html <hr /> @end html |