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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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10
libc/zipos/zipos.h
View file

@ -6,6 +6,11 @@ COSMOPOLITAN_C_START_
struct stat;
struct iovec;
struct Zipos {
uint8_t *map;
uint8_t *cdir;
};
struct ZiposUri {
const char *path;
size_t len;
@ -22,13 +27,14 @@ struct ZiposHandle {
extern const char kZiposSchemePrefix[4];
struct Zipos *__zipos_get(void);
ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
ssize_t __zipos_find(const struct ZiposUri *);
ssize_t __zipos_find(struct Zipos *, const struct ZiposUri *);
int __zipos_close(struct ZiposHandle *);
int __zipos_open(const struct ZiposUri *, unsigned, int);
int __zipos_stat(const struct ZiposUri *, struct stat *);
int __zipos_fstat(const struct ZiposHandle *, struct stat *);
int __zipos_stat_impl(size_t, struct stat *);
int __zipos_stat_impl(struct Zipos *, size_t, struct stat *);
ssize_t __zipos_read(struct ZiposHandle *, const struct iovec *, size_t,
ssize_t);
ssize_t __zipos_write(struct ZiposHandle *, const struct iovec *, size_t,