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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
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_
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#define COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct stat;
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struct iovec;
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struct Zipos {
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uint8_t *map;
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uint8_t *cdir;
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};
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struct ZiposUri {
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const char *path;
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size_t len;
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};
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struct ZiposHandle {
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uint8_t *mem; /* deflated file base */
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size_t size; /* byte length of file */
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size_t pos; /* read/write byte offset state */
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uint32_t cfile; /* central directory entry rva */
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uint8_t *map;
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size_t mapsize;
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};
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extern const char kZiposSchemePrefix[4];
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struct Zipos *__zipos_get(void);
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ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
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ssize_t __zipos_find(struct Zipos *, const struct ZiposUri *);
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int __zipos_close(struct ZiposHandle *);
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int __zipos_open(const struct ZiposUri *, unsigned, int);
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int __zipos_stat(const struct ZiposUri *, struct stat *);
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int __zipos_fstat(const struct ZiposHandle *, struct stat *);
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int __zipos_stat_impl(struct Zipos *, size_t, struct stat *);
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ssize_t __zipos_read(struct ZiposHandle *, const struct iovec *, size_t,
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ssize_t);
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ssize_t __zipos_write(struct ZiposHandle *, const struct iovec *, size_t,
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ssize_t);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_ */
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