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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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33
libc/tinymath/cprojl.S
View file

@ -20,39 +20,22 @@
#include "libc/macros.h"
.source __FILE__
/ Projects into Rienmann sphere.
/
/ @param z is complex long double passed on stack
/ @note needs sse3
tinymath_cprojl:
.profilable
sub $24,%rsp
fldt 32(%rsp)
fnstcw 14(%rsp)
movzwl 14(%rsp),%eax
orb $12,%ah
movw %ax,12(%rsp)
fldcw 12(%rsp)
fistpq (%rsp)
fldcw 14(%rsp)
movq (%rsp),%rsi
fisttpq 8(%rsp)
fldt 48(%rsp)
movq 8(%rsp),%rsi
mov %rsi,%rax
fldcw 12(%rsp)
fistpq (%rsp)
fldcw 14(%rsp)
movq (%rsp),%rcx
fisttpq 8(%rsp)
mov 8(%rsp),%rcx
add $24,%rsp
mov %rcx,%rdx
ret
.endfn tinymath_cprojl,globl
.alias tinymath_cprojl,cprojl
/ TODO(jart):
/ sub $24,%rsp
/ fldt 32(%rsp)
/ fisttpq 8(%rsp)
/ fldt 48(%rsp)
/ movq 8(%rsp),%rsi
/ mov %rsi,%rax
/ fisttpq 8(%rsp)
/ movq 8(%rsp),%rcx
/ add $24,%rsp
/ mov %rcx,%rdx
/ ret