Skip to content

[CI] Run a thumbv7m-none-eabi binary using qemu-system-arm [IRR-2018-embedded] #53996

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 14 commits into from
Nov 6, 2018
Merged

[CI] Run a thumbv7m-none-eabi binary using qemu-system-arm [IRR-2018-embedded] #53996

Show file tree
Hide file tree
Changes from 5 commits
Commits
Show all changes
14 commits
Select commit Hold shift + click to select a range
2747775
[ci] add qemu-system-arm in docker image
sekineh Aug 29, 2018
502023a
[ci] thumbv7m-none-eabi: build lm3s6965evb and runon QEMU
sekineh Sep 2, 2018
719a592
[ci] thumbv7m-none-eabi: add more variable.
sekineh Sep 3, 2018
a04754f
[ci] run-make/thumb-none-qemu: uses cortex-m-rt crate.
sekineh Sep 30, 2018
fdf4d6e
[ci] run-make/thumb-none-qemu: add thumbv6m-none-qemu
sekineh Sep 30, 2018
5b0f486
[ci] run-make/thumb-none-qemu: transfer logic to script.sh
sekineh Oct 10, 2018
a4faa5e
[ci] run-make/thumb-none-qemu: transfer logic to script.sh (2)
sekineh Oct 10, 2018
8d2b2ee
[ci] run-make/thumb-none-qemu: add example crate.
sekineh Oct 16, 2018
f40fd4b
[ci] run both debug and release
sekineh Oct 16, 2018
3064e0a
[ci] fix tidy warning.
sekineh Oct 16, 2018
06d0a71
[ci] clean up potentially harmful envs
sekineh Oct 16, 2018
7cac7b6
[ci] run-make/thumb-none-qemu: use GNU LD.
sekineh Oct 17, 2018
35bbcf1
[ci] fix tidy warning.
sekineh Oct 18, 2018
f872303
[ci] run-make/thumb-none-qemu: add .cargo/config
sekineh Nov 4, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion src/ci/docker/dist-various-1/Dockerfile
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
libssl-dev \
pkg-config \
gcc-arm-none-eabi \
libnewlib-arm-none-eabi
libnewlib-arm-none-eabi \
qemu-system-arm

WORKDIR /build

Expand Down
33 changes: 33 additions & 0 deletions src/test/run-make/thumb-none-qemu/Makefile
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
-include ../../run-make-fulldeps/tools.mk

# How to run this
# $ ./x.py clean
# $ ./x.py test --target thumbv7m-none-eabi src/test/run-make

ifneq (,$(filter $(TARGET),thumbv6m-none-eabi thumbv7m-none-eabi))

# For cargo setting
RUSTC := $(RUSTC_ORIGINAL)
LD_LIBRARY_PATH := $(HOST_RPATH_DIR)
# We need to be outside of 'src' dir in order to run cargo
WORK_DIR := $(TMPDIR)
HERE := $(shell pwd)


# hint: we could set variables per $(TARGET) basis in order to support other targets.
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

qemu-system-arm only supports full system emulation of the LM3S6965 and LM3S811 microcontrollers. They are both Cortex-M3 microcontrollers so we can test the thumbv6m-none-eabi and thumbv7m-none-eabi targets with either QEMU target. The thumbv7em-none-eabi and thumbv7em-none-eabihf targets have incompatible ISAs and they can crash QEMU.

It would be great to also test the thumbv6m-none-eabi target here since it's an older ARM architecture. If you are up to it you can do that in a follow-up PR.

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Ahem, older... ;) Cortex-M0 is still very relevant, is there any support for a CM0 MCU in qemu?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@therealprof I've run 4 binaries on qemu-system-arm. As I remember, some worked in different board setting. My theory is if an ISA (thumbv6m-none-eabi) is roughly a subset of another (thumbv7m-none-eabi), and there's no harmful register changes, it has chance to run successfully. I'll try with existing qemu setting for thumbv6m (Cortex-M0) also.

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@sekineh thumbv6m-none-eabi is indeed a subset of thumbv7m-none-eabi and code might run just fine on higher ISA versions. However to be on the safe(r) side you really want to test on a Cortex-M0(+) target or emulation.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@therealprof these are the Cortex CPUs QEMU 3.0.0 supports:

  cortex-a15
  cortex-a7
  cortex-a8
  cortex-a9
  cortex-m3
  cortex-m33
  cortex-m4
  cortex-r5
  cortex-r5f

No cortex-m0 or cortex-m4f but you can run code compiled for thumbv6m-none-eabi using -cpu cortex-m3 since the M0 ISA is a subset of the M3 ISA. We can't run code compiled for the thumbv7em-none-eabihf though because the FPU instructions crash QEMU.

I'm not entirely sure if -machine is completely orthogonal to -cpu but I would prefer not to mix a Cortex-M3 machine with -cpu cortex-m4.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I successfully ran the thumv6m-none-eabi binary on qemu -cpu cortex-m3

sekineh@sekineh-VirtualBox:~/cortex-m-rt_me$ cargo run --example qemu --target thumbv6m-none-eabi
    Finished dev [unoptimized + debuginfo] target(s) in 0.03s                                                    
     Running `qemu-system-arm -cpu cortex-m3 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -kernel target/thumbv6m-none-eabi/debug/examples/qemu`
x = 42

CRATE := cortex-m-rt
CRATE_URL := https://github.com/rust-embedded/cortex-m-rt
CRATE_SHA1 := 62972c8a89ff54b76f9ef0d600c1fcf7a233aabd

all:
env
mkdir -p $(WORK_DIR)
-cd $(WORK_DIR) && rm -rf $(CRATE)
cd $(WORK_DIR) && bash -x $(HERE)/../git_clone_sha1.sh $(CRATE) $(CRATE_URL) $(CRATE_SHA1)
cd $(WORK_DIR)/$(CRATE) && $(CARGO) run --target $(TARGET) --example qemu | grep "x = 42"
cd $(WORK_DIR)/$(CRATE) && $(CARGO) run --target $(TARGET) --example qemu --release | grep "x = 42"
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Move logic l23-28 into separate file like script.sh? It will make error log clearer.

else

all:

endif