diff options
| author | kib <kib@FreeBSD.org> | 2010-12-25 08:51:20 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-12-25 08:51:20 +0000 |
| commit | cefd8b2a41e4b4bf7a16e2dea1e0c719a30d56a3 (patch) | |
| tree | 487c080e0cb090d960945a4f112301253d4a6e9f /libexec/rtld-elf/rtld.1 | |
| parent | 377233e6cca2d48c8ecba755aa46304a8ae7731b (diff) | |
| download | FreeBSD-src-cefd8b2a41e4b4bf7a16e2dea1e0c719a30d56a3.zip FreeBSD-src-cefd8b2a41e4b4bf7a16e2dea1e0c719a30d56a3.tar.gz | |
Implement support for ELF filters in rtld. Both normal and auxillary
filters are implemented.
Filtees are loaded on demand, unless LD_LOADFLTR environment variable
is set or -z loadfltr was specified during the linking. This forces
rtld to upgrade read-locked rtld_bind_lock to write lock when it
encounters an object with filter during symbol lookup.
Consolidate common arguments of the symbol lookup functions in the
SymLook structure. Track the state of the rtld locks in the
RtldLockState structure. Pass local RtldLockState through the rtld
symbol lookup calls to allow lock upgrades.
Reviewed by: kan
Tested by: Mykola Dzham <i levsha me>, nwhitehorn (powerpc)
Diffstat (limited to 'libexec/rtld-elf/rtld.1')
| -rw-r--r-- | libexec/rtld-elf/rtld.1 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libexec/rtld-elf/rtld.1 b/libexec/rtld-elf/rtld.1 index 592cb95..f77b150 100644 --- a/libexec/rtld-elf/rtld.1 +++ b/libexec/rtld-elf/rtld.1 @@ -221,6 +221,14 @@ If set, .Nm will log events such as the loading and unloading of shared objects via .Xr utrace 2 . +.Pp +.It Ev LD_LOADFLTR +If set, +.Nm +will process the filtee dependencies of the loaded objects immediately, +instead of postponing it until required. +Normally, the filtees are opened at the time of the first symbol resolution +from the filter object. .El .Sh FILES .Bl -tag -width ".Pa /var/run/ld-elf32.so.hints" -compact |
