Observation of book not the same as what is happening

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#148 opened on Feb 17, 2019 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 35/100

Issue type: Documentation
Clarity: Mostly clear
Activity status: Stale
Tech stack: rust
Domain: documentation, embedded-iot

Research direction

Start with the debugging section at rust-embedded.github.io/book/start/qemu.html#debugging and compare its GDB transcript with the reported output from Rust 1.32, GDB 8.2, and cortex-m-rt 0.6.7. Determine whether the transcript should be updated or the version-specific difference explained; done means the documentation accurately accounts for the observed reset location.

Written by the indexing model from the issue text.

Description

https://rust-embedded.github.io/book/start/qemu.html#debugging

Then within the GDB shell we connect to QEMU, which is waiting for a connection on TCP port 3333.

(gdb) target remote :3333
Remote debugging using :3333
Reset () at $REGISTRY/cortex-m-rt-0.6.1/src/lib.rs:473
473     pub unsafe extern "C" fn Reset() -> ! {

instead:

» gdb-multiarch -q target/thumbv7m-none-eabi/debug/examples/hello
Reading symbols from target/thumbv7m-none-eabi/debug/examples/hello...done.
(gdb) target remote :3333
Remote debugging using :3333
Reset () at /home/flip111/.cargo/registry/src/github.com-1ecc6299db9ec823/cortex-m-rt-0.6.7/src/lib.rs:498
498	    __pre_init();

ubuntu 18.10
gdb 8.2
rust 1.32

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PR merge metrics: No merged PRs in 30d

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