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Merged
mkobetic merged 10 commits into from
Apr 15, 2026
Merged

arm/linux: dtest and CI segfault #89

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8f6eda9
arm/linux: dtest and CI segfault
mkobetic Apr 8, 2026
8085cc3
fix
mkobetic Apr 9, 2026
f85de5e
fix
mkobetic Apr 10, 2026
8640e8b
tweak
mkobetic Apr 10, 2026
3ee6a8e
fix test command
mkobetic Apr 10, 2026
16f8eff
c before forth
mkobetic Apr 10, 2026
09d3d01
fix
mkobetic Apr 12, 2026
ae58dbf
fix
mkobetic Apr 13, 2026
160d7ab
tweak
mkobetic Apr 13, 2026
4e51ce6
fix
mkobetic Apr 13, 2026
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6 changes: 6 additions & 0 deletions .github/workflows/arm-build.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -39,12 +39,18 @@ jobs:
- name: Build LM4F120 (TARGET=LM4)
run: cd arm/mcu/lm4f120 && TARGET=LM4 make all

- name: Build LM4120 (WANT_IGNORECASE)
run: cd arm/mcu/lm4f120 && WANT_IGNORECASE=1 make all

- name: Cache and Install QEMU ARM
uses: awalsh128/cache-apt-pkgs-action@latest
with:
packages: qemu-system-arm
version: 1 # Change this to manually bust the cache

- name: LM4F120 Core Tests (WANT_ITC)
run: cd arm/mcu/lm4f120 && TIMEOUT=5s make tests

- name: Build QEMU virt (WANT_ITC)
run: cd arm/mcu/qemu && WANT_IGNORECASE=1 WANT_ITC=1 make all

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20 changes: 10 additions & 10 deletions .github/workflows/arm-linux-build.yaml
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Expand Up @@ -33,20 +33,20 @@ jobs:
make segments
make sections

# - name: Cache and Install QEMU USER ARM
# uses: awalsh128/cache-apt-pkgs-action@latest
# with:
# packages: qemu-user-static
# version: 1 # Change this to manually bust the cache
- name: Cache and Install QEMU USER ARM
uses: awalsh128/cache-apt-pkgs-action@latest
with:
packages: qemu-user-static
version: 1 # Change this to manually bust the cache

# - name: QEMU Core Tests
# run: cd arm/mcu/linux && TIMEOUT=5s make tests
- name: QEMU Core Tests
run: cd arm/mcu/linux && TIMEOUT=5s make tests

- name: Build Linux/RaspPi (WANT_ITC)
run: cd arm/mcu/linux && WANT_ITC=1 make all
run: cd arm/mcu/linux && WANT_IGNORECASE=1 WANT_ITC=1 make all

# - name: QEMU Core Tests (WANT_ITC)
# run: cd arm/mcu/linux && TIMEOUT=5s make tests
- name: QEMU Core Tests (WANT_ITC)
run: cd arm/mcu/linux && TIMEOUT=5s make tests

- name: Update Refcards
if: github.ref == 'refs/heads/main'
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2 changes: 1 addition & 1 deletion arm/mcu/linux/Makefile
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Expand Up @@ -22,7 +22,7 @@ endif
# Included after various configuration bits are defined (importantly MCU_LD)
include $(AMFORTH)/arm/dev/Makefile

LDFLAGS += -z max-page-size=4096
LDFLAGS += -no-pie -static -z max-page-size=4096
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@mkobetic mkobetic Apr 12, 2026

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These flags don't fix anything but should be there as they indicate to the linker that the code is not meant to be relocated.


# To run amforth in emulated container you can use a container runtime that supports --platform linux/arm/v7
# For MacOS check out https://orbstack.dev/ (Free for personal use)
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10 changes: 10 additions & 0 deletions arm/mcu/linux/amforth.s
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Expand Up @@ -15,6 +15,16 @@ _start:

ldr r0, =PFA_COLD
bx r0 @ Switch to thumb mode

/*
It seems qemu-arm-static really dislikes having a tiny text segment, next to the large forth segment.
The small .text section ends up not loading correctly, it is allocated but filled with zeros, thus segfault.
It seems allocating a page-worth of bytes in the intervening .data section helps the qemu elf loader work correctly.
*/
.data
.space 0x1000
.align 8

.thumb

.section amforth, "awx" @ Everything is writeable and executable
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2 changes: 1 addition & 1 deletion arm/mcu/lm4f120/Makefile
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Expand Up @@ -21,7 +21,7 @@ AMFORTH ?= $(shell git rev-parse --show-toplevel)
include $(AMFORTH)/arm/dev/Makefile

## Upload bin file to the device
upload: build/amforth.elf
upload:
lm4flash build/amforth.bin

# QEMU's lm3s6965evb machine is not the LM4F120H5QR (m3 vs m4), but seems to be close enough.
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2 changes: 1 addition & 1 deletion arm/mcu/ra4m1/Makefile
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Expand Up @@ -52,7 +52,7 @@ OPENOCD ?= openocd
# The touch1200bps often doesn't work, not sure why (check the -boot option maybe?)
# Double pressing the reset button is reliable.
## Upload bin file to the device
upload: build/amforth.bin touch1200bps
upload:
touch1200bps/touch1200bps /dev/$(MODEM)
$(BOSSAC) --debug --port=$(MODEM) --write build/amforth.bin --reset

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