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support/testing: add FLAT stack size test case

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Add an infrastructure test case to verify that the per-package
<PKG>_FLAT_STACKSIZE variable correctly configures the stack size in the
generated FLAT binary header.

Signed-off-by: Fengwei Tan <tfx2001@outlook.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Fengwei Tan
2026-09-12 17:24:12 +08:00
committed by Thomas Petazzoni
parent 6c781be506
commit 0bf4525045
9 changed files with 80 additions and 0 deletions
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3
DEVELOPERS
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@@ -1124,6 +1124,9 @@ F: configs/freescale_imx6ullevk_defconfig
N: Falco Hyfing <hyfinglists@gmail.com>
F: package/python-pymodbus/
N: Fengwei Tan <tfx2001@outlook.com>
F: support/testing/tests/core/test_flat_stacksize.py
N: Fiona Klute <fiona.klute@gmx.de>
F: package/*/S*
F: package/panel-mipi-dbi-firmware/

1
support/testing/tests/core/br2-external/flat-stacksize/Config.in Normal file
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@@ -0,0 +1 @@
source "$BR2_EXTERNAL_FLAT_STACKSIZE_PATH/package/flat-stacksize-test/Config.in"

1
support/testing/tests/core/br2-external/flat-stacksize/external.desc Normal file
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@@ -0,0 +1 @@
name: FLAT_STACKSIZE

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support/testing/tests/core/br2-external/flat-stacksize/external.mk Normal file
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@@ -0,0 +1 @@
include $(sort $(wildcard $(BR2_EXTERNAL_FLAT_STACKSIZE_PATH)/package/*/*.mk))

7
support/testing/tests/core/br2-external/flat-stacksize/package/flat-stacksize-test/Config.in Normal file
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@@ -0,0 +1,7 @@
config BR2_PACKAGE_FLAT_STACKSIZE_TEST
bool "flat-stacksize-test"
depends on BR2_BINFMT_FLAT && !BR2_USE_MMU
help
Package for testing the $(PKG)_FLAT_STACKSIZE variable, which
defines the stack size of an application built into the
FLAT binary format.

15
support/testing/tests/core/br2-external/flat-stacksize/package/flat-stacksize-test/Makefile Normal file
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@@ -0,0 +1,15 @@
O ?= $(CURDIR)
CANONICAL_O := $(shell mkdir -p $(O) >/dev/null 2>&1)$(realpath $(O))
TARGET := $(CANONICAL_O)/flat_stacksize_test
all: $(TARGET)
$(TARGET): main.c
$(CC) $(CFLAGS) -o $@ main.c
clean:
rm -f $(TARGET)
.PHONY: all clean

22
support/testing/tests/core/br2-external/flat-stacksize/package/flat-stacksize-test/flat-stacksize-test.mk Normal file
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@@ -0,0 +1,22 @@
################################################################################
#
# flat-stacksize-test
#
################################################################################
# Define a stack size that is different from the default FLAT
# stack size (4096 bytes).
FLAT_STACKSIZE_TEST_FLAT_STACKSIZE = 8192
define FLAT_STACKSIZE_TEST_BUILD_CMDS
$(TARGET_MAKE_ENV) $(MAKE) \
-C $(FLAT_STACKSIZE_TEST_PKGDIR) O=$(@D) \
$(TARGET_CONFIGURE_OPTS)
endef
define FLAT_STACKSIZE_TEST_INSTALL_TARGET_CMDS
$(INSTALL) -D -m 0755 $(@D)/flat_stacksize_test \
$(TARGET_DIR)/usr/bin/flat_stacksize_test
endef
$(eval $(generic-package))

3
support/testing/tests/core/br2-external/flat-stacksize/package/flat-stacksize-test/main.c Normal file
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@@ -0,0 +1,3 @@
int main(void) {
return 0;
}

27
support/testing/tests/core/test_flat_stacksize.py Normal file
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@@ -0,0 +1,27 @@
import os
import infra.basetest
class TestFlatStackSize(infra.basetest.BRTest):
br2_external = [infra.filepath("tests/core/br2-external/flat-stacksize")]
config = """
BR2_arm=y
BR2_cortex_m4=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV7M_UCLIBC_STABLE=y
# BR2_TARGET_ROOTFS_TAR is not set
BR2_PACKAGE_FLAT_STACKSIZE_TEST=y
"""
def test_run(self):
binary = os.path.join(
self.builddir, "target", "usr", "bin", "flat_stacksize_test"
)
self.assertTrue(os.path.exists(binary))
# Check the FLAT binary header really carries the stack size
# declared by the package (8192 = 0x2000).
out = infra.run_cmd_on_host(self.builddir, ["arm-linux-flthdr", binary])
self.assertIn("Stack Size: 0x2000\n", out)