gasm | An Experimental Wasm Virtual Machine for Gophers

by mathetake Go Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | gasm Summary

gasm is a Go library typically used in Binary Executable Format applications. gasm has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A minimal implementation of v1 WASM spec compatible virtual machine purely written in go. The vm can be embedded in your go program without any dependency like cgo, and enables Gophers to write wasm host environments easily. The vm should be used only for providing sandbox environments embedded in your Go program since we have not implemented validation of wasm binary. The implementation is quite straightforward and I hope this code would be a good starting point for novices to learn WASM spec.

Support

Quality

Security

License

Reuse

Support

gasm has a low active ecosystem.

It has 469 star(s) with 29 fork(s). There are 13 watchers for this library.

It had no major release in the last 6 months.

There are 10 open issues and 4 have been closed. On average issues are closed in 99 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of gasm is current.

Quality

gasm has no bugs reported.

Security

gasm has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

gasm is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

gasm releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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gasm Key Features

No Key Features are available at this moment for gasm.

gasm Examples and Code Snippets

No Code Snippets are available at this moment for gasm.

Community Discussions

Trending Discussions on gasm

What does *%gs:0x10 do in assembler?

Invalid reference to argument 'N' in GASM Inlining

QUESTION

What does *%gs:0x10 do in assembler?

Asked 2017-Sep-21 at 08:43

What does following syntax do in GASM?

...

ANSWER

Answered 2017-Sep-21 at 08:43

It's a near absolute indirect (FF /2) call to the target of the pointer in gs:0x10.
Note that gs is a selector register, not a general purpose register (see Protected mode).
The instruction read the DWORD at the offset 0x10 (relative to segment gs) and makes a call to its value.
A direct call would have another effect entirely, possibly involving call gates.

gs:0x10 is where libc copies the address of __kernel_vsyscall during its initialization.

The AT&T syntax for the control transfer instructions is

Branch addressing using registers or memory operands must be prefixed by a '*'. To specify a "far" control tranfers, a 'l' must be prefixed, as in ljmp, lcall, etc. For example,

Source https://stackoverflow.com/questions/41690592

QUESTION

Invalid reference to argument 'N' in GASM Inlining

Asked 2017-Jan-26 at 04:45

I'm building Botan on Solaris 11.3 with the SunCC compiler that comes with Developer Studio 12.5. I'm not too familiar with the library or Solaris, and it takes me some effort to track down issues.

The compile is dying on a relatively benign file called divide.cpp. I've got it reduced to the following test case. According to Oracle's GCC-style asm inlining support in Sun Studio 12 compilers, the ASM is well formed. Clang, GCC and ICC happily consume the code.

...

ANSWER

Answered 2017-Jan-26 at 04:45

What does the error message indicate?

Unfortunately, no idea.

If someone buys a support contract and has the time, then please solicit Oracle for an answer .

How can I get SunCC to provide a source file and line number?

Unfortunately, no idea.

How can I work around the issue?

David Wohlferd suspected the [b]"=rm"(b) output operand. It looks like the one ASM block needs to be split into two blocks. Its an awful hack, but we have not figured out another way to do it.

Source https://stackoverflow.com/questions/41852552

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install gasm

You can download it from GitHub.

Support

WebAssembly System Interface (WASI) is partly supported in wasi package. Currently these methods are implemented:. By default, WASI uses the host process's Stdin, Stdout and Stderr and doesn't preopen any directories, but that can be changed with functional options. If you want to provide an in-memory file system to the wasm binary, you can do so with wasi.MemFS().

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