mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-07 11:48:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Support Linux binfmt_misc and APE loading on Apple

Browse source 
The "no modify self" variant of Actually Portable Executable is now
supported on all platforms. If you use `$(APE_NO_MODIFY_SELF)` then
ld.bfd will embed a 4096 byte ELF binary and a 4096 byte Macho file
which are installed on the fly to ${TMPDIR:-/tmp}, which enables us
launch the executable, without needing to copy the whole executable

To prevent it from copying a tiny executable to your temp directory
you need to install the `ape` command (renamed from ape-loader), to
a system path. For example:

    # FreeBSD / NetBSD / OpenBSD
    make -j8 o//ape/ape
    cp o//ape/ape /usr/bin/ape

    # Mac OS
    # make -j8 o//ape/ape.macho
    curl https://justine.lol/ape.macho >/usr/bin/ape
    chmod +x /usr/bin/ape

On Linux you can get even more performance with the new binfmt_misc
support which makes launching non-modifying APE binaries as fast as
launching ELF executables. Running the following command:

    # Linux
    ape/apeinstall.sh

Will copy APE loader to /usr/bin/ape and register with binfmt_misc
Lastly, this change also fixes a really interesting race condition
with OpenBSD thread joining.
This commit is contained in:
Justine Tunney 2022-05-21 07:52:58 -07:00
parent 7838edae88
commit db0d8dd806
31 changed files with 1089 additions and 305 deletions
Download patch file Download diff file Expand all files Collapse all files

11
build/sanitycheck
View file

@ -37,15 +37,14 @@ ERROR
DETAILS
Actually Portable Executable assumes stock Linux configuration.
Normal behavior is non-ELF files with x bit are run by /bin/sh.
Linux lets people globally define arbitrary magic interpreters.
Your computer couldve been tuned to run MZ scripts inside WINE.
So if you use binfmt_misc you need to explicitly register this.
Your system has likely been configured to use binfmt_misc and wine.
You need to run the command below which will install a /usr/bin/ape
program and then register it with binfmt_misc. See ape/loader.c for
source code and technical details.
WORKAROUND
sudo sh -c "echo ':APE:M::MZqFpD::/bin/sh:' >/proc/sys/fs/binfmt_misc/register"
ape/apeinstall.sh
SEE ALSO