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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/log/log.h
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@ -17,8 +17,8 @@
#ifndef LOGGABLELEVEL
#ifndef NDEBUG
#define LOGGABLELEVEL kLogDebug
#elif IsTiny()
#define LOGGABLELEVEL kLogFatal
/* #elif IsTiny() */
/* #define LOGGABLELEVEL kLogInfo */
#else
#define LOGGABLELEVEL kLogInfo
#endif
@ -37,15 +37,16 @@ extern FILE *g_logfile;
void backtrace(FILE *) relegated; /* shows fn backtrace and args */
void perror(const char *) relegated; /* print the last system error */
void die(void) relegated noreturn; /* print backtrace and abort() */
void meminfo(FILE *); /* shows malloc statistics &c. */
void memsummary(FILE *); /* light version of same thing */
void meminfo(int); /* shows malloc statistics &c. */
void memsummary(int); /* light version of same thing */
uint16_t getttycols(uint16_t);
int getttysize(int, struct winsize *) paramsnonnull();
bool cancolor(void) nothrow nocallback;
bool isterminalinarticulate(void) nosideeffect;
char *commandvenv(const char *, const char *) nodiscard;
const char *GetAddr2linePath(void);
const char *GetGdbPath(void);
void showmappings(FILE *);
void showcrashreports(void);
void callexitontermination(struct sigset *);
bool32 IsDebuggerPresent(bool);