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| author | Josh Triplett <josh@joshtriplett.org> | 2014-04-03 14:48:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:21:05 -0700 |
| commit | 69369a7003735d0d8ef22097e27a55a8bad9557a (patch) | |
| tree | b7638899a8e81fc18a497791685f1b571d733896 /init/Kconfig | |
| parent | 8f6c5ffc8987f4f5b5a3e9d557d94bbf3a9bf216 (diff) | |
| download | lwn-69369a7003735d0d8ef22097e27a55a8bad9557a.tar.gz lwn-69369a7003735d0d8ef22097e27a55a8bad9557a.zip | |
fs, kernel: permit disabling the uselib syscall
uselib hasn't been used since libc5; glibc does not use it. Support
turning it off.
When disabled, also omit the load_elf_library implementation from
binfmt_elf.c, which only uselib invokes.
bloat-o-meter:
add/remove: 0/4 grow/shrink: 0/1 up/down: 0/-785 (-785)
function old new delta
padzero 39 36 -3
uselib_flags 20 - -20
sys_uselib 168 - -168
SyS_uselib 168 - -168
load_elf_library 426 - -426
The new CONFIG_USELIB defaults to `y'.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index e45cc62904b3..8114a06117e3 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -273,6 +273,16 @@ config FHANDLE get renamed. Enables open_by_handle_at(2) and name_to_handle_at(2) syscalls. +config USELIB + bool "uselib syscall" + default y + help + This option enables the uselib syscall, a system call used in the + dynamic linker from libc5 and earlier. glibc does not use this + system call. If you intend to run programs built on libc5 or + earlier, you may need to enable this syscall. Current systems + running glibc can safely disable this. + config AUDIT bool "Auditing support" depends on NET |