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db0d8dd806
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 ${TMPDIR:-/tmp}, which enables us
launch the executable, without needing to copy the whole executable
To prevent it from copying a tiny executable to your temp directory
you need to install the `ape` command (renamed from ape-loader), to
a system path. For example:
# FreeBSD / NetBSD / OpenBSD
make -j8 o//ape/ape
cp o//ape/ape /usr/bin/ape
# Mac OS
# make -j8 o//ape/ape.macho
curl https://justine.lol/ape.macho >/usr/bin/ape
chmod +x /usr/bin/ape
On Linux you can get even more performance with the new binfmt_misc
support which makes launching non-modifying APE binaries as fast as
launching ELF executables. Running the following command:
# Linux
ape/apeinstall.sh
Will copy APE loader to /usr/bin/ape and register with binfmt_misc
Lastly, this change also fixes a really interesting race condition
with OpenBSD thread joining.
63 lines
2 KiB
Bash
Executable file
63 lines
2 KiB
Bash
Executable file
#!/bin/sh
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if ! [ x"$(uname -s)" = xLinux ]; then
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echo this script is intended for linux binfmt_misc >&2
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echo freebsd/netbsd/openbsd users can use release binary >&2
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exit 1
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fi
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if [ -f o/depend ]; then
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# mkdeps.com build was successfully run so assume we can build
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echo >&2
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echo running: make -j8 o//ape/ape >&2
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make -j8 o//ape/ape || exit
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echo done >&2
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else
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# no evidence we can build, use prebuilt one
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mkdir -p o//ape || exit
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cp -af build/bootstrap/ape o//ape/ape
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fi
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echo >&2
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echo installing o//ape/ape to /usr/bin/ape >&2
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echo sudo mv -f o//ape/ape /usr/bin/ape >&2
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sudo mv -f o//ape/ape /usr/bin/ape || exit
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echo done >&2
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if [ -e /proc/sys/fs/binfmt_misc/APE ]; then
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echo >&2
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echo it looks like APE is already registered with binfmt_misc >&2
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echo please check that it is mapped to ape not /bin/sh >&2
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echo cat /proc/sys/fs/binfmt_misc/APE >&2
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cat /proc/sys/fs/binfmt_misc/APE >&2
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# TODO: we need better uninstall recommendations
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# the following works fine for justine
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# but might remove unrelated software?
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# sudo sh -c 'echo -1 >/proc/sys/fs/binfmt_misc/status'
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exit
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fi
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if ! [ -e /proc/sys/fs/binfmt_misc ]; then
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echo >&2
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echo loading binfmt_misc into your kernel >&2
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echo you may need to edit configs to persist across reboot >&2
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echo sudo modprobe binfmt_misc >&2
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sudo modprobe binfmt_misc || exit
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echo done >&2
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fi
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if ! [ -e /proc/sys/fs/binfmt_misc/register ]; then
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echo >&2
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echo mounting binfmt_misc into your kernel >&2
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echo you may need to edit configs to persist across reboot >&2
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echo sudo mount -t binfmt_misc none /proc/sys/fs/binfmt_misc >&2
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sudo mount -t binfmt_misc none /proc/sys/fs/binfmt_misc || exit
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echo done >&2
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fi
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echo >&2
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echo registering APE with binfmt_misc >&2
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echo you may need to edit configs to persist across reboot >&2
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echo 'sudo sh -c "echo '"'"':APE:M::MZqFpD::/usr/bin/ape:'"'"' >/proc/sys/fs/binfmt_misc/register"' >&2
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sudo sh -c "echo ':APE:M::MZqFpD::/usr/bin/ape:' >/proc/sys/fs/binfmt_misc/register" || exit
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echo done >&2
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