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From: Alexandre Oliva <aoliva@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/aoliva/heads/testme)] Add leafy mode for zero-call-used-regs [ada doc] Date: Tue, 25 Oct 2022 02:52:31 +0000 (GMT) [thread overview] Message-ID: <20221025025231.A81F43857C4B@sourceware.org> (raw) https://gcc.gnu.org/g:d22b56f2ce234543b3f662f18346a61ddca2c820 commit d22b56f2ce234543b3f662f18346a61ddca2c820 Author: Alexandre Oliva <oliva@gnu.org> Date: Thu Oct 20 20:19:43 2022 -0300 Add leafy mode for zero-call-used-regs [ada doc] Document leafy mode. for gcc/ada/ChangeLog * doc/gnat_rm/security_hardening_features.rst (Register Scrubbing): Document leafy mode. Diff: --- gcc/ada/doc/gnat_rm/security_hardening_features.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/gcc/ada/doc/gnat_rm/security_hardening_features.rst b/gcc/ada/doc/gnat_rm/security_hardening_features.rst index fd55752bf33..1780c0d3035 100644 --- a/gcc/ada/doc/gnat_rm/security_hardening_features.rst +++ b/gcc/ada/doc/gnat_rm/security_hardening_features.rst @@ -34,6 +34,12 @@ subprograms. pragma Machine_Attribute (Bar, "zero_call_used_regs", "all"); -- Before returning, Bar scrubs all call-clobbered registers. + function Baz return Integer; + pragma Machine_Attribute (Bar, "zero_call_used_regs", "leafy"); + -- Before returning, Bar scrubs only call-clobbered registers + -- that it uses itself, if it can be identified as a leaf + -- function, or all such registers otherwise. + For usage and more details on the command-line option, on the ``zero_call_used_regs`` attribute, and on their use with other
next reply other threads:[~2022-10-25 2:52 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-25 2:52 Alexandre Oliva [this message] 2023-06-08 4:48 Alexandre Oliva 2023-06-08 9:18 Alexandre Oliva 2023-06-08 10:43 Alexandre Oliva 2023-06-08 10:59 Alexandre Oliva 2023-06-09 6:17 Alexandre Oliva 2023-06-09 6:25 Alexandre Oliva 2023-06-09 8:07 Alexandre Oliva 2023-06-23 20:13 Alexandre Oliva 2023-06-23 20:56 Alexandre Oliva
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