f4f4caab0e
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
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
/**
|
|
* @fileoverview Cosmopolitan Preprocessor / Language Normalization.
|
|
*
|
|
* This is our lowest-level header file. You don't need to include it,
|
|
* since we require that compilers be configured to do so automatically,
|
|
* and the -include flag is the safest bet. Further note polyfills here
|
|
* shouldn't be taken as indicators of intent to support.
|
|
*/
|
|
|
|
#define __COSMOPOLITAN__ 1
|
|
|
|
#ifndef __COUNTER__
|
|
#define __COUNTER__ __LINE__
|
|
#endif
|
|
|
|
#if __GNUC__ + 0 < 2
|
|
#undef __GNUC__
|
|
#elif defined(__GNUC__) && defined(SWIG) /* lool */
|
|
#undef __GNUC__
|
|
#elif defined(__GNUC__) && defined(__NVCC__) /* lool */
|
|
#undef __GNUC__
|
|
#elif !defined(__GNUC__) && defined(__APPLE__) /* modesty */
|
|
#define __GNUC__ 4
|
|
#define __GNUC_MINOR__ 2
|
|
#define __GNUC_PATCHLEVEL__ 1
|
|
#elif !defined(__GNUC__) && defined(__TINYC__)
|
|
#define __GNUC__ 2
|
|
#define __GNUC_MINOR__ 0
|
|
#define __GNUC_PATCHLEVEL__ 0
|
|
#endif
|
|
|
|
#if !defined(__x86_64__) && \
|
|
(defined(__amd64__) || (defined(_M_AMD64) && defined(_M_X64)))
|
|
#define __x86_64__ 1
|
|
#elif !defined(__i386__) && ((defined(__i486__) || defined(__i586__) || \
|
|
defined(__i686__) || defined(__i786__)) || \
|
|
_M_IX86 + 0 >= 400)
|
|
#define __i386__ 1
|
|
#elif !defined(__ia16__) && (defined(__MSDOS__) || defined(__BCC__))
|
|
#define __ia16__ 1
|
|
#endif
|
|
#if __ia16__ + __i386__ + __x86_64__ + 0
|
|
#define __x86__ 1
|
|
#endif
|
|
|
|
#ifndef __has_attribute
|
|
#define __has_attribute(x) 0
|
|
#endif
|
|
#ifndef __has_builtin
|
|
#define __has_builtin(x) 0
|
|
#endif
|
|
#ifndef __has_cpp_attribute
|
|
#define __has_cpp_attribute(x) 0
|
|
#endif
|
|
|
|
#ifdef unix
|
|
#undef unix
|
|
#endif
|
|
|
|
#ifdef linux
|
|
#undef linux
|
|
#endif
|
|
|
|
#ifndef __BIGGEST_ALIGNMENT__
|
|
#define __BIGGEST_ALIGNMENT__ 16
|
|
#endif
|
|
|
|
#define BIGPAGESIZE 0x200000
|
|
#define FRAMESIZE 0x10000 /* 8086 */
|
|
#define STACKSIZE 0x10000 /* goog */
|
|
#define PAGESIZE 0x1000 /* i386+ */
|
|
#define BUFSIZ 0x1000 /* best stdio default */
|
|
#define CACHELINE 0x40 /* nexgen32e */
|
|
#define CHAR_BIT 8 /* b/c von neumann */
|
|
#define ENV_MAX 0x7fff /* b/c windows */
|
|
#define ARG_MAX 0x3fff /* b/c windows */
|
|
#define CMD_MAX 0x4000 /* b/c windows */
|
|
#define PATH_MAX 248 /* b/c windows */
|
|
#define NAME_MAX 63 /* b/c dns */
|
|
#define CHILD_MAX 25 /* only if malloc isn't linked */
|
|
#define OPEN_MAX 16 /* only if malloc isn't linked */
|
|
#define ATEXIT_MAX 32 /* only if malloc isn't linked */
|
|
#define NSIG 128 /* it's complicated */
|
|
|
|
#if defined(__LP64__) && !defined(__INT64_TYPE__)
|
|
#include "libc/integral/lp64.inc"
|
|
#endif
|
|
|
|
#if !(__ASSEMBLER__ + __LINKER__ + 0)
|
|
#ifdef __STDC__
|
|
#include "libc/integral/c.inc"
|
|
#else
|
|
#define const
|
|
#define volatile
|
|
#endif
|
|
#ifdef __cplusplus
|
|
#include "libc/integral/cxx.inc"
|
|
#endif
|
|
#endif
|