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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-01 09:56:05 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-07 10:27:20 -0300 |
| commit | 78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0 (patch) | |
| tree | 11eb67f745b6a4142c44e486fba71e74e655f864 /include | |
| parent | 091ee2190dd5f30ca5eb4549f531ab7b75a1fd6e (diff) | |
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linux: Add PR_SET_VMA_ANON_NAME support
Linux 5.17 added support to naming anonymous virtual memory areas
through the prctl syscall. The __set_vma_name is a wrapper to avoid
optimizing the prctl call if the kernel does not support it.
If the kernel does not support PR_SET_VMA_ANON_NAME, prctl returns
EINVAL. And it also returns the same error for an invalid argument.
Since it is an internal-only API, it assumes well-formatted input:
aligned START, with (START, START+LEN) being a valid memory range,
and NAME with a limit of 80 characters without an invalid one
("\\`$[]").
Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/prctl.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sys/prctl.h b/include/sys/prctl.h index d33f3a290e..8e8e05b07c 100644 --- a/include/sys/prctl.h +++ b/include/sys/prctl.h @@ -3,6 +3,11 @@ # ifndef _ISOMAC +# ifndef PR_SET_VMA +# define PR_SET_VMA 0x53564d41 +# define PR_SET_VMA_ANON_NAME 0 +# endif + extern int __prctl (int __option, ...); libc_hidden_proto (__prctl) |