Rust Documentation: Hello World on SPARC crashes since 2024-Oct-10
Summary
Executing the exact instructions from the rtems user manual results in a hello_rtems_sparc.exe executable which crashes when executed. Currently, the output looks like:
+ rtems-run --rtems-bsp=leon3-sis hello_rtems_sparc.exe
RTEMS Testing - Run, 6.0.not_released
Command Line: /opt/rtems/6/bin/rtems-run --rtems-bsp=leon3-sis hello_rtems_sparc.exe
Host: Linux 134940171c14 5.14.21-150500.55.68-default #1 SMP PREEMPT_DYNAMIC Wed Jun 5 21:39:05 UTC 2024 (40e256a) x86_64
Python: 3.12.3 (main, Sep 11 2024, 14:17:37) [GCC 13.2.0]
Host: Linux-5.14.21-150500.55.68-default-x86_64-with-glibc2.39 (Linux 134940171c14 5.14.21-150500.55.68-default #1 SMP PREEMPT_DYNAMIC Wed Jun 5 21:39:05 UTC 2024 (40e256a) x86_64 x86_64)
SIS - SPARC/RISCV instruction simulator 2.30, copyright Jiri Gaisler 2020
Bug-reports to jiri@gaisler.se
LEON3 emulation enabled, 4 cpus online, delta 50 clocks
Loaded hello_rtems_sparc.exe, entry 0x40000000
*** FATAL ***
fatal source: 9 (RTEMS_FATAL_SOURCE_EXCEPTION)
CPU: 0
unexpected trap 133
PSR = 0xf3401fc0
PC = 0x4000adc8
nPC = 0x4000adcc
WIM = 0x00000040
Y = 0x00000000
g0 = 0x00000000
g1 = 0x4000b32c
g2 = 0x00010009
g3 = 0x0001004b
g4 = 0x00000000
g5 = 0x00000000
g6 = 0x40026600
g7 = 0x00000000
[more register dumps]The first known buggy build was:
| Version/Commmit | |
|---|---|
| Date: | 2024-10-10T09:56:41+02:00 |
| rtems-docs: | 7817d7a3 |
| rtems-source-builder: | 989ec6342f410f21e6585e4828a4c5f4f8da5e83 |
| rtems: | bd9f5c1eb07ec245576abb93d3bc54618be1fb94 |
| cargo: | 1.81.0 (2dbb1af80 2024-08-20) |
| rustc: | 1.83.0-nightly (eb4e23467 2024-10-09) |
The last known good build was:
| Version/Commmit | |
|---|---|
| Date: | 2024-10-09T02:33:07+02:00 |
| rtems-docs: | 7817d7a3 |
| rtems-source-builder: | 8c8156d2133a08d5b93de33828ae1e7009f49974 |
| rtems: | bd9f5c1eb07ec245576abb93d3bc54618be1fb94 |
| cargo: | 1.81.0 (2dbb1af80 2024-08-20) |
| rustc: | 1.83.0-nightly (3ae715c8c 2024-10-07) |
I had the CI re-run with the rtems, rtems-source-builder, rtems-docs git commits from the last good build – resulting in the same crash. Hence, I assume this is a new bug Rust nigthly.
By the way, the build of hello world for Risc V (which is also part of the RTEMS user manual instructions) is not affected and works fine. It uses the standard rustc and not the nightly one.
The last bug of this type #32 (closed) was just closed by the Rust community on Sunday (with a lot of labor) and this new issue pops up on Thursday ...
Steps to reproduce
Follow the instructions in Bare Metal Rust with RTEMS