tree f6eebab9322436e4bfd6e27de22a4217bcd557df
parent 0d78b3b5b1b5c391aa96b481be106de023810b66
author Laurent Vivier <laurent@vivier.eu> 1377820004 +0200
committer Riku Voipio <riku.voipio@linaro.org> 1380008827 +0300

linux-user: add support of binfmt_misc 'O' flag

The binfmt_misc module can calculate the credentials and security
token according to the binary instead of to the interpreter if the
'C' flag is enabled.

To be able to execute non-readable binaries, this flag implies 'O'
flag. When 'O' flag is enabled, bintfmt_misc opens the file for
reading and pass the file descriptor to the interpreter.

References:
linux/Documentation/binfmt_misc.txt          ['O' and 'C' description]
linux/fs/binfmt_misc.c linux/fs/binfmt_elf.c [ AT_EXECFD usage ]

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>