32bit x86 Rust binaries are unsupported and incorrectly loaded as 64bit binaries

[cyberkaida]

Describe the bug Loading an i686 Linux rust binary throws an exception related to loading the cspec and RDI:

Full application.log is attached below.

kaida/.local/opt/ghidra_11.0_PUBLIC/Ghidra/Processors/x86/data/extensions/rust/unix/cc.xml ghidra.xml.XmlParseException: Unknown pentry register: RDI

To Reproduce Steps to reproduce the behavior:

• Download the Linux i686 GNU ripgrep and import rg (SHA256: 1275b5345b08e5bdc9bd7bd138a3b617863dcce9db5fe70814a194aea4c18508)
• Import with default options
• Ghidra throws an error (See application.log)

Expected behavior No error about RDI, cscpec loaded correctly.

Screenshots If applicable, add screenshots to help explain your problem.

Attachments

• application.log

Environment (please complete the following information):

• OS: macOS 14.1.2 - Build 23B2091
• Java Version: openjdk 17.0.9 2023-10-17
• Ghidra Version: 11.0
• Ghidra Origin: 11.0 GitHub release

Additional context Seems to be an issue in only the Linux cspec? I tried an aarch64 macOS binary and a Windows binary and both were fine.

[cyberkaida]

Should this be mentioning RDI? Should it be EDI?

% file ~/Downloads/ripgrep-14.0.3-i686-unknown-linux-gnu/rg
/Users/kaida/Downloads/ripgrep-14.0.3-i686-unknown-linux-gnu/rg: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=214b1ffe3fa4d81ab6eddc0129856206864d95e1, stripped

It looks like it is using 64 bit extensions for this 32 bit file. Loading a 64 bit executable works fine.

[cyberkaida]

I think the bitsize of the architecture needs to be considered here: https://github.com/NationalSecurityAgency/ghidra/blob/f7013bdfab8eac54387a49ed290444da9af88499/Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/analysis/rust/RustUtilities.java#L73-L81

and a new compiler spec needs to be written for 32 bit x86.