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cosmopolitan/libc/runtime
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Justine Tunney 5e8c928f1a
Introduce dlopen() support 
Every program built using Cosmopolitan is statically-linked. However
there are some cases, e.g. GUIs and video drivers, where linking the
host platform libraries is desirable. So what we do in such cases is
launch a stub executable using the host platform's libc, and longjmp
back into this executable. The stub executable passes back to us the
platform-specific dlopen() implementation, which we shall then wrap.

Here's the list of platforms that are supported so far:

- x86-64 Linux w/ Glibc
- x86-64 Linux w/ Musl Libc
- x86-64 FreeBSD
- x86-64 Windows
- aarch64 Linux w/ Glibc
- aarch64 MacOS

What this means is your Cosmo programs can call foreign functions on
your host operating system. However, it's important to note that any
foreign library you link won't have the ability to call functions in
your Cosmopolitan program. For example it's now technically possible
that Lua can load a module, however that almost certainly won't work
since the Lua module won't have access to Cosmo's Lua API.

Kudos to @jacereda for figuring out how to do this.
2023-11-03 06:37:18 -07:00
..
.cosmo Move zipos into runtime package 2023-08-11 23:14:02 -07:00
__sigsetjmp_tail.c Add siglongjmp() for aarch64 2023-09-21 10:10:20 -07:00
clktck.h Make major improvements to redbean and libraries 2021-04-18 12:34:15 -07:00
clone-linux.S Make improvements 2023-06-03 08:12:22 -07:00
clone-openbsd.S Pay off more technical debt 2022-09-12 23:36:56 -07:00
clone-xnu.S Make fixes and improvements 2022-11-08 10:11:46 -08:00
clone.c Improve threading and i/o routines 2023-10-12 23:13:04 -07:00
closesymboltable.c Reduce makefile dependencies by 10% 2022-06-08 20:01:28 -07:00
cosmo.S Make improvements 2023-10-08 08:59:53 -07:00
cosmo2.c Make improvements 2023-10-08 08:59:53 -07:00
cxaguard.c Add support for C++ thread safe statics 2023-08-12 07:45:32 -07:00
dsohandle.S Introduce --strace flag for system call tracing 2022-03-18 18:07:28 -07:00
e820.internal.h Support malloc() on bare metal 2021-02-24 00:53:24 -08:00
efimain.greg.c [metal] Add a uprintf() routine, for non-emergency boot logging (#905) 2023-10-25 14:32:20 -07:00
efipostboot.S Introduce native support for MacOS ARM64 2023-05-20 04:17:03 -07:00
elf_loader.h Introduce dlopen() support 2023-11-03 06:37:18 -07:00
enable_tls.c Implement signal handler tail recursion 2023-10-14 10:38:15 -07:00
exit.c Make improvements for Actually Portable Emacs 2023-08-19 06:44:58 -07:00
fenv.h Make further progress on non-x86 support 2023-05-10 04:20:47 -07:00
fesetround.c Make more progress on aarch64 2023-05-10 04:20:47 -07:00
findcombinary.c Make improvements 2023-09-06 12:34:59 -07:00
finddebugbinary.c Make improvements 2023-10-08 08:59:53 -07:00
fltrounds.c Make progress towards aarch64 build 2023-05-10 04:20:46 -07:00
fpathconf.c Make more compatibility improvements 2022-09-06 12:36:34 -07:00
fpreset.S Get --ftrace working on aarch64 2023-06-05 23:35:31 -07:00
ftrace-hook.S Make improvements 2023-10-15 16:45:00 -07:00
ftrace_install.c Incorporate more small improvements 2023-07-23 10:57:18 -07:00
ftrace_stackdigs.c Make fixes and improvements 2023-07-09 05:21:11 -07:00
ftraceinit.greg.c Make improvements 2023-09-21 07:30:39 -07:00
ftracer.c Make improvements 2023-10-08 08:59:53 -07:00
getargmax.c Fix small matters and improve sysconf() 2023-08-17 00:32:11 -07:00
getavphyspages.c Fix small matters and improve sysconf() 2023-08-17 00:32:11 -07:00
getdosargv.c Fix issues for latest GCC toolchain 2023-10-11 14:54:42 -07:00
getdosenviron.c Make improvements 2023-09-18 21:04:47 -07:00
getinterpreterexecutablename.c Fix warnings 2023-09-01 20:50:18 -07:00
getlogin.c Fix warnings 2023-09-01 20:50:18 -07:00
getlogin_r.c Emulate ENOTDIR better 2023-08-16 20:11:23 -07:00
getmemtracksize.c Make improvements 2023-09-18 21:04:47 -07:00
getpagesize.c Port a lot more code to AARCH64 2023-05-14 09:37:26 -07:00
getphyspages.c Fix small matters and improve sysconf() 2023-08-17 00:32:11 -07:00
getresourcelimit.c Fix small matters and improve sysconf() 2023-08-17 00:32:11 -07:00
getsymbol.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
getsymbolbyaddr.c Make improvements 2023-09-18 21:04:47 -07:00
getsymbolname.c Mint APE Loader v1.5 2023-07-26 13:54:49 -07:00
getsymboltable.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
getsysctl.c Fix small matters and improve sysconf() 2023-08-17 00:32:11 -07:00
grow.c Mint APE Loader v1.5 2023-07-26 13:54:49 -07:00
hook.greg.c Emulate ENOTDIR better 2023-08-16 20:11:23 -07:00
inflate.c Support non-blocking i/o across platforms 2023-07-23 02:56:47 -07:00
init.S Fix breakages in Linux-only build modes 2023-07-09 19:51:44 -07:00
interceptflag.greg.c Fix warnings 2023-09-01 20:50:18 -07:00
internal.h Make improvements 2023-10-08 08:59:53 -07:00
isheap.c Make improvements 2023-10-03 06:17:16 -07:00
ismemtracked.greg.c Replace COSMO define with _COSMO_SOURCE 2023-08-13 20:55:04 -07:00
isstackoverflow.c Improve stack overflow recovery 2023-10-04 07:35:17 -07:00
login_tty.c Fix bug in login_tty() 2023-10-31 18:03:13 -07:00
mapanon.c Pay off more technical debt 2022-09-12 23:36:56 -07:00
mapshared.c Pay off more technical debt 2022-09-12 23:36:56 -07:00
mapstack.c Fix stack memory, undefined behavior, etc. 2023-08-15 19:10:08 -07:00
memtrack.internal.h Make improvements 2023-09-18 21:04:47 -07:00
memtrack64.txt Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
memtracknt.c Make improvements 2023-09-18 21:04:47 -07:00
metalprintf.greg.c Remove _Hide keyword 2023-07-24 08:34:58 -07:00
metalprintf.internal.h Support malloc() on bare metal 2021-02-24 00:53:24 -08:00
mman.internal.h [metal] Add a uprintf() routine, for non-emergency boot logging (#905) 2023-10-25 14:32:20 -07:00
mmap.c Make improvements 2023-10-08 08:59:53 -07:00
morph.c Remove _Hide keyword 2023-07-24 08:34:58 -07:00
morph_tls.c Make improvements 2023-10-08 08:59:53 -07:00
mprotect-nt.greg.c Rewrite special file handling on Windows 2023-10-14 02:53:34 -07:00
mprotect.c Make more fixes and improvements 2023-07-29 18:44:15 -07:00
msync-nt.c Make improvements 2023-09-18 21:04:47 -07:00
msync.c Make improvements 2023-10-08 08:59:53 -07:00
munmap.c Make improvements 2023-09-18 21:04:47 -07:00
openexecutable.c Replace COSMO define with _COSMO_SOURCE 2023-08-13 20:55:04 -07:00
opensymboltable.greg.c Make improvements 2023-10-08 08:59:53 -07:00
pathconf.h Make more compatibility improvements 2022-09-06 12:36:34 -07:00
pc.internal.h [metal] Fix video mode filtering & frame buffer ref-counting (#889) 2023-09-06 03:41:07 -07:00
printgarbage.c Fix bugs in cosmocc toolchain 2023-06-08 23:44:03 -07:00
printmaps.c Clean up some of the threading code 2022-09-08 12:31:56 -07:00
progname.S Clean old .source directive out of asm code 2022-03-18 12:43:21 -07:00
runtime.h Make improvements 2023-10-08 08:59:53 -07:00
runtime.mk Add siglongjmp() for aarch64 2023-09-21 10:10:20 -07:00
set_tls.c Make improvements 2023-09-21 07:30:39 -07:00
sigsetjmp.S Add siglongjmp() for aarch64 2023-09-21 10:10:20 -07:00
stack.h Make improvements 2023-09-18 21:04:47 -07:00
straceinit.greg.c Give Emacs another performance boost 2023-08-18 09:34:14 -07:00
symbols.c Get Fat Emacs working on Apple Silicon 2023-08-17 22:01:42 -07:00
symbols.internal.h Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
sysconf.c Make improvements 2023-09-18 21:04:47 -07:00
sysconf.h Make improvements 2023-09-18 21:04:47 -07:00
syslib.internal.h Introduce dlopen() support 2023-11-03 06:37:18 -07:00
untrackmemoryintervals.c Replace COSMO define with _COSMO_SOURCE 2023-08-13 20:55:04 -07:00
unwind.c Fix libunwind stubs 2022-06-26 05:29:25 -07:00
unwind.h Fix libunwind stubs 2022-06-26 05:29:25 -07:00
utmp.c Stub out getutline and pututline 2023-10-31 21:58:39 -07:00
utmp.h Add finger demo to redbean and fix regression 2022-06-23 03:42:05 -07:00
utmpx.h Add finger demo to redbean and fix regression 2022-06-23 03:42:05 -07:00
valist.c Remove plenty of makefile misconfigurations 2022-07-21 09:20:59 -07:00
warnifpowersave.c Make improvements 2023-10-08 08:59:53 -07:00
weakfree.c Pay off more technical debt 2022-09-12 23:36:56 -07:00
winargs.internal.h Make improvements 2023-10-08 08:59:53 -07:00
winmain.greg.c Make some more fixes 2023-10-09 12:22:00 -07:00
zipos-access.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-close.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-fcntl.c Make ZipOS and Qemu work better 2023-08-15 18:32:50 -07:00
zipos-find.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-fstat.c Improve zip read-only filesystem 2023-08-16 17:52:12 -07:00
zipos-get.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-inode.c Rewrite special file handling on Windows 2023-10-14 02:53:34 -07:00
zipos-mmap.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-normpath.c Make improvements 2023-08-21 02:34:17 -07:00
zipos-notat.c Move zipos into runtime package 2023-08-11 23:14:02 -07:00
zipos-open.c Make improvements 2023-10-08 08:59:53 -07:00
zipos-parseuri.c Introduce COSMOPOLITAN_DISABLE_ZIPOS environ var 2023-08-16 21:04:16 -07:00
zipos-read.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-seek.c Make improvements 2023-09-18 21:04:47 -07:00
zipos-stat-impl.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos-stat.c Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos.internal.h Revert "Rewrite ZipOS" 2023-10-03 14:40:03 -07:00
zipos.S Make improvements for Actually Portable Emacs 2023-08-19 06:44:58 -07:00