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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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41
libc/intrin/macros.h
View file

@ -7,13 +7,13 @@
#define INTRIN_COMMUTATIVE "%"
#define INTRIN_NONCOMMUTATIVE
#ifndef __STRICT_ANSI__
#if defined(__x86_64__) && !defined(__STRICT_ANSI__)
typedef char __intrin_xmm_t _Vector_size(16) mayalias;
typedef char __intrin_xmm_t _Vector_size(16) aligned(16) mayalias;
#define INTRIN_SSEVEX_X_X_X_(PURE, ISA, OP, FLAGS, A, B, C) \
do { \
if (!IsModeDbg() && X86_NEED(SSE) && X86_HAVE(ISA)) { \
if (!IsModeDbg() && X86_HAVE(ISA)) { \
__intrin_xmm_t *Xmm0 = (void *)(A); \
const __intrin_xmm_t *Xmm1 = (const __intrin_xmm_t *)(B); \
const __intrin_xmm_t *Xmm2 = (const __intrin_xmm_t *)(C); \
@ -29,7 +29,37 @@ typedef char __intrin_xmm_t _Vector_size(16) mayalias;
#define INTRIN_SSEVEX_X_X_I_(PURE, ISA, OP, A, B, I) \
do { \
if (!IsModeDbg() && X86_NEED(SSE) && X86_HAVE(ISA)) { \
if (!IsModeDbg() && X86_HAVE(ISA)) { \
__intrin_xmm_t *Xmm0 = (void *)(A); \
const __intrin_xmm_t *Xmm1 = (const __intrin_xmm_t *)(B); \
if (!X86_NEED(AVX)) { \
asm(OP "\t%2,%1,%0" : "=x"(*Xmm0) : "x"(*Xmm1), "i"(I)); \
} else { \
asm("v" OP "\t%2,%1,%0" : "=x"(*Xmm0) : "x"(*Xmm1), "i"(I)); \
} \
} else { \
PURE(A, B, I); \
} \
} while (0)
#define INTRIN_SSEVEX_X_X_(PURE, ISA, OP, A, B) \
do { \
if (!IsModeDbg() && X86_HAVE(ISA)) { \
__intrin_xmm_t *Xmm0 = (void *)(A); \
const __intrin_xmm_t *Xmm1 = (const __intrin_xmm_t *)(B); \
if (!X86_NEED(AVX)) { \
asm(OP "\t%1,%0" : "=x"(*Xmm0) : "0"(*Xmm1)); \
} else { \
asm("v" OP "\t%1,%0" : "=x"(*Xmm0) : "x"(*Xmm1)); \
} \
} else { \
PURE(A, B); \
} \
} while (0)
#define INTRIN_SSEVEX_X_I_(PURE, ISA, OP, A, B, I) \
do { \
if (!IsModeDbg() && X86_HAVE(ISA)) { \
__intrin_xmm_t *Xmm0 = (void *)(A); \
const __intrin_xmm_t *Xmm1 = (const __intrin_xmm_t *)(B); \
if (!X86_NEED(AVX)) { \
@ -45,7 +75,8 @@ typedef char __intrin_xmm_t _Vector_size(16) mayalias;
#else
#define INTRIN_SSEVEX_X_X_X_(PURE, ISA, OP, FLAGS, A, B, C) PURE(A, B, C)
#define INTRIN_SSEVEX_X_X_I_(PURE, ISA, OP, A, B, I) PURE(A, B, I)
#endif /* ANSI */
#define INTRIN_SSEVEX_X_I_(PURE, ISA, OP, A, B, I) PURE(A, B, I)
#endif /* X86 && !ANSI */
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_MACROS_H_ */