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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-07-08 16:38:10 -0300 |
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| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-07-31 17:02:05 -0300 |
| commit | 52ddeb99b2db8247a7095ae1354acb3ca3e4ea4a (patch) | |
| tree | 483786f0c7d72de96b718a3902e493ec26eb2dfe /manual/.gitignore | |
| parent | 8d2a331b64c8d299d11826058c43d29643cf6b86 (diff) | |
| download | glibc-azanella/mseal.zip glibc-azanella/mseal.tar.gz glibc-azanella/mseal.tar.bz2 | |
elf: Add support for GNU_PROPERTY_NO_MEMORY_SEALazanella/mseal
The GNU_PROPERTY_NO_MEMORY_SEAL is a GNU property per module instructing
the glibc not to seal the object PT_LOAD. It can be used for any reason
the modules require to seal not to be enabled (i.e., on Firefox hack to
bypass the dynamic loader and enable DT_RELR on older glibc [1]). In
this case, it is up to the module to apply memory sealing itself.
The sealing is applied by default, and it is always enforced with
glibc.rtld.seal=2.
Checked on aarch64-linux-gnu, x86_64-linux-gnu, and
powerpc64le-linux-gnu.
[1] https://glandium.org/blog/?p=4297
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