investigating patchelf for sysexts

T

tulipOP•2/28/24, 2:17 AM

yeah

T

tulipOP•2/28/24, 2:18 AM

data from before:

T

tulipOP•2/28/24, 2:18 AM

this exists: https://github.com/NixOS/patchelf

GitHub

GitHub - NixOS/patchelf: A small utility to modify the dynamic link...

A small utility to modify the dynamic linker and RPATH of ELF executables - NixOS/patchelf

T

tulipOP•2/28/24, 2:18 AM

and this might help prefixing our sysext binaries and libraries

T

tulipOP•2/28/24, 2:18 AM

by running something like

patchelf $MAGIC_FLAGS $LIBRARY_PATH $BINARY

patchelf $MAGIC_FLAGS $LIBRARY_PATH $BINARY

patchelf $MAGIC_FLAGS $LIBRARY_PATH $BINARY

patchelf $MAGIC_FLAGS $LIBRARY_PATH $BINARY

T

tulipOP•2/28/24, 2:19 AM

readelf exists too and its output is very parseable by any script

readelf -d /home/linuxbrew/.linuxbrew/bin/nvim | grep 'R.*PATH'

readelf -d /home/linuxbrew/.linuxbrew/bin/nvim | grep 'R.*PATH'

readelf -d /home/linuxbrew/.linuxbrew/bin/nvim | grep 'R.*PATH'

readelf -d /home/linuxbrew/.linuxbrew/bin/nvim | grep 'R.*PATH'

T

tulipOP•2/28/24, 2:19 AM

 0x000000000000000f (RPATH)              Library rpath: [/home/linuxbrew/.linuxbrew/Cellar/neovim/0.9.5/lib:/home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current:/home/linuxbrew/.linuxbrew/opt/icu4c/lib:/home/linuxbrew/.linuxbrew/opt/ncurses/lib:/home/linuxbrew/.linuxbrew/opt/readline/lib:/home/linuxbrew/.linuxbrew/opt/zlib/lib:/home/linuxbrew/.linuxbrew/opt/libxml2/lib:/home/linuxbrew/.linuxbrew/opt/gettext/lib:/home/linuxbrew/.linuxbrew/opt/unibilium/lib:/home/linuxbrew/.linuxbrew/opt/libtermkey/lib:/home/linuxbrew/.linuxbrew/opt/libvterm/lib:/home/linuxbrew/.linuxbrew/opt/luajit/lib:/home/linuxbrew/.linuxbrew/opt/luv/lib:/home/linuxbrew/.linuxbrew/opt/msgpack/lib:/home/linuxbrew/.linuxbrew/opt/tree-sitter/lib:/home/linuxbrew/.linuxbrew/opt/openssl@3/lib:/home/linuxbrew/.linuxbrew/opt/libedit/lib:/home/linuxbrew/.linuxbrew/opt/krb5/lib:/home/linuxbrew/.linuxbrew/opt/libtirpc/lib:/home/linuxbrew/.linuxbrew/opt/libnsl/lib:/home/linuxbrew/.linuxbrew/lib]

 0x000000000000000f (RPATH)              Library rpath: [/home/linuxbrew/.linuxbrew/Cellar/neovim/0.9.5/lib:/home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current:/home/linuxbrew/.linuxbrew/opt/icu4c/lib:/home/linuxbrew/.linuxbrew/opt/ncurses/lib:/home/linuxbrew/.linuxbrew/opt/readline/lib:/home/linuxbrew/.linuxbrew/opt/zlib/lib:/home/linuxbrew/.linuxbrew/opt/libxml2/lib:/home/linuxbrew/.linuxbrew/opt/gettext/lib:/home/linuxbrew/.linuxbrew/opt/unibilium/lib:/home/linuxbrew/.linuxbrew/opt/libtermkey/lib:/home/linuxbrew/.linuxbrew/opt/libvterm/lib:/home/linuxbrew/.linuxbrew/opt/luajit/lib:/home/linuxbrew/.linuxbrew/opt/luv/lib:/home/linuxbrew/.linuxbrew/opt/msgpack/lib:/home/linuxbrew/.linuxbrew/opt/tree-sitter/lib:/home/linuxbrew/.linuxbrew/opt/openssl@3/lib:/home/linuxbrew/.linuxbrew/opt/libedit/lib:/home/linuxbrew/.linuxbrew/opt/krb5/lib:/home/linuxbrew/.linuxbrew/opt/libtirpc/lib:/home/linuxbrew/.linuxbrew/opt/libnsl/lib:/home/linuxbrew/.linuxbrew/lib]

 0x000000000000000f (RPATH)              Library rpath: [/home/linuxbrew/.linuxbrew/Cellar/neovim/0.9.5/lib:/home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current:/home/linuxbrew/.linuxbrew/opt/icu4c/lib:/home/linuxbrew/.linuxbrew/opt/ncurses/lib:/home/linuxbrew/.linuxbrew/opt/readline/lib:/home/linuxbrew/.linuxbrew/opt/zlib/lib:/home/linuxbrew/.linuxbrew/opt/libxml2/lib:/home/linuxbrew/.linuxbrew/opt/gettext/lib:/home/linuxbrew/.linuxbrew/opt/unibilium/lib:/home/linuxbrew/.linuxbrew/opt/libtermkey/lib:/home/linuxbrew/.linuxbrew/opt/libvterm/lib:/home/linuxbrew/.linuxbrew/opt/luajit/lib:/home/linuxbrew/.linuxbrew/opt/luv/lib:/home/linuxbrew/.linuxbrew/opt/msgpack/lib:/home/linuxbrew/.linuxbrew/opt/tree-sitter/lib:/home/linuxbrew/.linuxbrew/opt/openssl@3/lib:/home/linuxbrew/.linuxbrew/opt/libedit/lib:/home/linuxbrew/.linuxbrew/opt/krb5/lib:/home/linuxbrew/.linuxbrew/opt/libtirpc/lib:/home/linuxbrew/.linuxbrew/opt/libnsl/lib:/home/linuxbrew/.linuxbrew/lib]

 0x000000000000000f (RPATH)              Library rpath: [/home/linuxbrew/.linuxbrew/Cellar/neovim/0.9.5/lib:/home/linuxbrew/.linuxbrew/opt/gcc/lib/gcc/current:/home/linuxbrew/.linuxbrew/opt/icu4c/lib:/home/linuxbrew/.linuxbrew/opt/ncurses/lib:/home/linuxbrew/.linuxbrew/opt/readline/lib:/home/linuxbrew/.linuxbrew/opt/zlib/lib:/home/linuxbrew/.linuxbrew/opt/libxml2/lib:/home/linuxbrew/.linuxbrew/opt/gettext/lib:/home/linuxbrew/.linuxbrew/opt/unibilium/lib:/home/linuxbrew/.linuxbrew/opt/libtermkey/lib:/home/linuxbrew/.linuxbrew/opt/libvterm/lib:/home/linuxbrew/.linuxbrew/opt/luajit/lib:/home/linuxbrew/.linuxbrew/opt/luv/lib:/home/linuxbrew/.linuxbrew/opt/msgpack/lib:/home/linuxbrew/.linuxbrew/opt/tree-sitter/lib:/home/linuxbrew/.linuxbrew/opt/openssl@3/lib:/home/linuxbrew/.linuxbrew/opt/libedit/lib:/home/linuxbrew/.linuxbrew/opt/krb5/lib:/home/linuxbrew/.linuxbrew/opt/libtirpc/lib:/home/linuxbrew/.linuxbrew/opt/libnsl/lib:/home/linuxbrew/.linuxbrew/lib]

B

bketelsen•2/28/24, 2:19 AM

side note

B

bketelsen•2/28/24, 2:19 AM

statically linked Go apps don't have any RPATH entries

B

bketelsen•2/28/24, 2:20 AM

just a "NEEDED" field

T

tulipOP•2/28/24, 2:20 AM

lol interesting

B

bketelsen•2/28/24, 2:20 AM

readelf -d ~/go/bin/gopls

Dynamic section at offset 0x1479600 contains 19 entries:
  Tag        Type                         Name/Value
 0x0000000000000004 (HASH)               0x12f7640
 0x0000000000000006 (SYMTAB)             0x12f79c0
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000005 (STRTAB)             0x12f7720
 0x000000000000000a (STRSZ)              669 (bytes)
 0x0000000000000007 (RELA)               0x12f7168
 0x0000000000000008 (RELASZ)             24 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x0000000000000003 (PLTGOT)             0x1879740
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000001 (NEEDED)             Shared library: [libresolv.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000006ffffffe (VERNEED)            0x12f7580
 0x000000006fffffff (VERNEEDNUM)         1
 0x000000006ffffff0 (VERSYM)             0x12f75e0
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000002 (PLTRELSZ)           1008 (bytes)
 0x0000000000000017 (JMPREL)             0x12f7180
 0x0000000000000000 (NULL)               0x0

readelf -d ~/go/bin/gopls

Dynamic section at offset 0x1479600 contains 19 entries:
  Tag        Type                         Name/Value
 0x0000000000000004 (HASH)               0x12f7640
 0x0000000000000006 (SYMTAB)             0x12f79c0
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000005 (STRTAB)             0x12f7720
 0x000000000000000a (STRSZ)              669 (bytes)
 0x0000000000000007 (RELA)               0x12f7168
 0x0000000000000008 (RELASZ)             24 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x0000000000000003 (PLTGOT)             0x1879740
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000001 (NEEDED)             Shared library: [libresolv.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000006ffffffe (VERNEED)            0x12f7580
 0x000000006fffffff (VERNEEDNUM)         1
 0x000000006ffffff0 (VERSYM)             0x12f75e0
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000002 (PLTRELSZ)           1008 (bytes)
 0x0000000000000017 (JMPREL)             0x12f7180
 0x0000000000000000 (NULL)               0x0

readelf -d ~/go/bin/gopls

Dynamic section at offset 0x1479600 contains 19 entries:
  Tag        Type                         Name/Value
 0x0000000000000004 (HASH)               0x12f7640
 0x0000000000000006 (SYMTAB)             0x12f79c0
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000005 (STRTAB)             0x12f7720
 0x000000000000000a (STRSZ)              669 (bytes)
 0x0000000000000007 (RELA)               0x12f7168
 0x0000000000000008 (RELASZ)             24 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x0000000000000003 (PLTGOT)             0x1879740
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000001 (NEEDED)             Shared library: [libresolv.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000006ffffffe (VERNEED)            0x12f7580
 0x000000006fffffff (VERNEEDNUM)         1
 0x000000006ffffff0 (VERSYM)             0x12f75e0
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000002 (PLTRELSZ)           1008 (bytes)
 0x0000000000000017 (JMPREL)             0x12f7180
 0x0000000000000000 (NULL)               0x0

readelf -d ~/go/bin/gopls

Dynamic section at offset 0x1479600 contains 19 entries:
  Tag        Type                         Name/Value
 0x0000000000000004 (HASH)               0x12f7640
 0x0000000000000006 (SYMTAB)             0x12f79c0
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000005 (STRTAB)             0x12f7720
 0x000000000000000a (STRSZ)              669 (bytes)
 0x0000000000000007 (RELA)               0x12f7168
 0x0000000000000008 (RELASZ)             24 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x0000000000000003 (PLTGOT)             0x1879740
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000001 (NEEDED)             Shared library: [libresolv.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000006ffffffe (VERNEED)            0x12f7580
 0x000000006fffffff (VERNEEDNUM)         1
 0x000000006ffffff0 (VERSYM)             0x12f75e0
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000002 (PLTRELSZ)           1008 (bytes)
 0x0000000000000017 (JMPREL)             0x12f7180
 0x0000000000000000 (NULL)               0x0

B

bketelsen•2/28/24, 2:20 AM

needed libc, libresolv

T

tulipOP•2/28/24, 2:20 AM

also brian, apparently bext cannot be statically built with nix :( or at all actually

B

bketelsen•2/28/24, 2:20 AM

this is fascinating

B

bketelsen•2/28/24, 2:21 AM

I read a blog post about doing static linking go apps with nix a million years ago

Bbketelsen this is fascinating

T

tulipOP•2/28/24, 2:21 AM

yeah!!!

B

bketelsen•2/28/24, 2:21 AM

we'll use goreleaser

B

bketelsen•2/28/24, 2:21 AM

it'll be fine

B

bketelsen•2/28/24, 2:21 AM

I have a pro license

B

bketelsen•2/28/24, 2:21 AM

that's a good $20/mo investment tbh

Bbketelsen I read a blog post about doing static linking go apps with nix a million years a...

T

tulipOP•2/28/24, 2:21 AM

its just that like, bext required

lvm2

lvm2

lvm2

lvm2, which requires

systemdMinimal

systemdMinimal

systemdMinimal

systemdMinimal, which cannot be statically built without very weird binary patching things

T

tulipOP•2/28/24, 2:22 AM

i tried to build bext with

pkgsMusl

pkgsMusl

pkgsMusl

pkgsMusl and it didnt work :(

B

bketelsen•2/28/24, 2:22 AM

it is what it is

T

tulipOP•2/28/24, 2:22 AM

because

-lgpgme

-lgpgme

-lgpgme

-lgpgme and

-ldevmapper

-ldevmapper

-ldevmapper

-ldevmapper could not be found by pkg-conf....

T

tulipOP•2/28/24, 2:22 AM

its a very interesting rabbit hole but still very sad

B

bketelsen•2/28/24, 2:22 AM

maybe we break bext into two pieces

B

bketelsen•2/28/24, 2:22 AM

the developer piece and the user piece

T

tulipOP•2/28/24, 2:22 AM

the nix building thing and the management

T

tulipOP•2/28/24, 2:22 AM

yeah!

B

bketelsen•2/28/24, 2:22 AM

the user piece should just need to move things around and enable sysexts

B

bketelsen•2/28/24, 2:22 AM

the dev piece has all the hard requirements

T

tulipOP•2/28/24, 2:22 AM

i was thinking about doing that with the plugin architecture PR

T

tulipOP•2/28/24, 2:23 AM

im just doing preparatory work with UX stuff but ill be working on that right after these first PRs

Bbketelsen the dev piece has all the hard requirements

T

tulipOP•2/28/24, 2:23 AM

yeah!!

T

tulipOP•2/28/24, 2:23 AM

bext-nix-build

T

tulipOP•2/28/24, 2:23 AM

bext-oci-sysext

T

tulipOP•2/28/24, 2:23 AM

bext-melange

T

tulipOP•2/28/24, 2:23 AM

plugins like that

T

tulipOP•2/28/24, 2:24 AM

im so excited for all these sysexts and everything

T

tulipOP•2/28/24, 2:24 AM

that could benefit a lot of people

T

tulipOP•2/28/24, 2:24 AM

im so happy LOL

B

bketelsen•2/28/24, 2:25 AM

you're crushing this so hard. keep up the exploring, creating, building!

T

tulipOP•2/28/24, 2:25 AM

hell yeah i will. this is stuff that i really wanna do

B

bketelsen•2/28/24, 2:28 AM

UMM
game over https://pkg.go.dev/debug/elf

T

tulipOP•2/28/24, 2:28 AM

LOL WHAT

T

tulipOP•2/28/24, 2:28 AM

that will help out a bunch

T

tulipOP•2/28/24, 2:28 AM

i was thinking we were gonna need a bunch of workarounds in go

T

tulipOP•2/28/24, 2:28 AM

welp not anymore

T

tulipOP•2/28/24, 2:29 AM

LOL we can literally just edit the ELF symbols

investigating patchelf for sysexts

Similar Threads

Similar Threads

Similar Threads