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Add x86_64-linux-gnu emulator

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I wanted a tiny scriptable meltdown proof way to run userspace programs
and visualize how program execution impacts memory. It helps to explain
how things like Actually Portable Executable works. It can show you how
the GCC generated code is going about manipulating matrices and more. I
didn't feel fully comfortable with Qemu and Bochs because I'm not smart
enough to understand them. I wanted something like gVisor but with much
stronger levels of assurances. I wanted a single binary that'll run, on
all major operating systems with an embedded GPL barrier ZIP filesystem
that is tiny enough to transpile to JavaScript and run in browsers too.

https://justine.storage.googleapis.com/emulator625.mp4
This commit is contained in:
Justine Tunney 2020-08-25 04:23:25 -07:00
parent 467504308a
commit f4f4caab0e
1052 changed files with 65667 additions and 7825 deletions
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11
libc/sysv/consts.sh
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@ -410,15 +410,21 @@ syscon fcntl F_GETPIPE_SZ 0x0408 0 0 0 0
#
# group name GNU/Systemd XNU's Not UNIX FreeBSD OpenBSD XENIX Commentary
syscon at AT_FDCWD -100 -2 -100 -100 -100 # faked nt
syscon at AT_SYMLINK_FOLLOW 0x0400 0x40 0x0400 4 0
syscon at AT_SYMLINK_NOFOLLOW 0x0100 0x20 0x0200 2 0 # TODO(jart): What should NT do?
syscon at AT_REMOVEDIR 0x0200 0x80 0x0800 8 0x0200 # faked nt
syscon at AT_EACCESS 0x0200 0x10 0x0100 1 0
syscon at AT_SYMLINK_FOLLOW 0x0400 0x40 0x0400 4 0
syscon at AT_EMPTY_PATH 0x1000 0 0 0 0 # linux 2.6.39+; see unlink, O_TMPFILE, etc.
syscon memfd MFD_CLOEXEC 1 0 0 0 0
syscon memfd MFD_ALLOW_SEALING 2 0 0 0 0
# utimensat()
#
# group name GNU/Systemd XNU's Not UNIX FreeBSD OpenBSD XENIX Commentary
syscon utime UTIME_NOW 0x3fffffff 0x3fffffff -1 -2 0x3fffffff # polyfilled xnu/nt
syscon utime UTIME_OMIT 0x3ffffffe 0x3ffffffe -2 -1 0x3ffffffe # polyfilled xnu/nt
# getauxval() keys
#
# group name GNU/Systemd XNU's Not UNIX FreeBSD OpenBSD XENIX Commentary
@ -2701,9 +2707,6 @@ syscon misc T_FMT_AMPM 0x02002b 4 4 3 0
syscon misc UL_GETFSIZE 1 1 1 0 0
syscon misc UL_SETFSIZE 2 2 2 0 0
syscon misc UTIME_NOW 0x3fffffff 0 -1 -2 0
syscon misc UTIME_OMIT 0x3ffffffe 0 -2 -1 0
syscon misc XATTR_CREATE 1 2 0 0 0
syscon misc XATTR_REPLACE 2 4 0 0 0