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| author | Alexandre Oliva <oliva@adacore.com> | 2023-06-28 01:36:53 -0300 |
|---|---|---|
| committer | Marc Poulhiès <poulhies@adacore.com> | 2023-07-10 14:41:38 +0200 |
| commit | 92eeb32df4f134e96265631511b6b26609aa9c12 (patch) | |
| tree | e8daefccb4c5cfd3722153fe16dacb8a8166a84d | |
| parent | 63ae6bc60c0f67fb2791991bf4b6e7e0a907d420 (diff) | |
| download | gcc-92eeb32df4f134e96265631511b6b26609aa9c12.zip gcc-92eeb32df4f134e96265631511b6b26609aa9c12.tar.gz gcc-92eeb32df4f134e96265631511b6b26609aa9c12.tar.bz2 | |
ada: Add leafy mode for zero-call-used-regs
Document leafy mode.
gcc/ada/
* doc/gnat_rm/security_hardening_features.rst (Register
Scrubbing): Document leafy mode.
* gnat_rm.texi: Regenerate.
| -rw-r--r-- | gcc/ada/doc/gnat_rm/security_hardening_features.rst | 6 | ||||
| -rw-r--r-- | gcc/ada/gnat_rm.texi | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/ada/doc/gnat_rm/security_hardening_features.rst b/gcc/ada/doc/gnat_rm/security_hardening_features.rst index ad165cd..1432859 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 call-clobbered registers, either + -- those it uses itself, if it can be identified as a leaf + -- function, or all of them otherwise. + For usage and more details on the command-line option, on the ``zero_call_used_regs`` attribute, and on their use with other diff --git a/gcc/ada/gnat_rm.texi b/gcc/ada/gnat_rm.texi index b28e6eb..817ba0b 100644 --- a/gcc/ada/gnat_rm.texi +++ b/gcc/ada/gnat_rm.texi @@ -19,7 +19,7 @@ @copying @quotation -GNAT Reference Manual , Jul 04, 2023 +GNAT Reference Manual , Jul 10, 2023 AdaCore @@ -29191,6 +29191,12 @@ pragma Machine_Attribute (Foo, "zero_call_used_regs", "used"); function Bar return Integer; 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 call-clobbered registers, either +-- those it uses itself, if it can be identified as a leaf +-- function, or all of them otherwise. @end example For usage and more details on the command-line option, on the |