3rd-party/linux-kernel-module-cheat
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Code Issues Releases Wiki Activity

prebuilt: failed extract-vmlinux attempt

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Ciro Santilli 六四事件 法轮功
2018-09-16 06:43:18 +01:00
parent e2f36b5bc1
commit 0bf7c7cb81
3 changed files with 13 additions and 1 deletions
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3
README.adoc
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@@ -582,12 +582,15 @@ but QEMU builds are pretty quick, and this further increases the probability of
For gem5, do: For gem5, do:
.... ....
git submodule update --init --depth 1 "$(./getvar linux_src_dir)"
sudo apt-get install qemu-utils sudo apt-get install qemu-utils
./build-gem5 ./build-gem5
./run --gem5 --prebuilt ./run --gem5 --prebuilt
.... ....
`qemu-utils` is required because we currently distribute `.qcow2` files which <<gem5-qcow2,gem5 can't handle>>, so we need `qemu-img` to extract them first. `qemu-utils` is required because we currently distribute `.qcow2` files which <<gem5-qcow2,gem5 can't handle>>, so we need `qemu-img` to extract them first.
The Linux kernel is required for `extract-vmlinux` to convert the compressed kernel image which QEMU understands into the raw vmlinux that gem5 understands: https://superuser.com/questions/298826/how-do-i-uncompress-vmlinuz-to-vmlinux
//// ////
[[host]] [[host]]

1
common.py
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@@ -30,6 +30,7 @@ submodules_dir = os.path.join(root_dir, 'submodules')
buildroot_src_dir = os.path.join(submodules_dir, 'buildroot') buildroot_src_dir = os.path.join(submodules_dir, 'buildroot')
gem5_default_src_dir = os.path.join(submodules_dir, 'gem5') gem5_default_src_dir = os.path.join(submodules_dir, 'gem5')
linux_src_dir = os.path.join(submodules_dir, 'linux') linux_src_dir = os.path.join(submodules_dir, 'linux')
extract_vmlinux = os.path.join(linux_src_dir, 'scripts', 'extract-vmlinux')
qemu_src_dir = os.path.join(submodules_dir, 'qemu') qemu_src_dir = os.path.join(submodules_dir, 'qemu')
parsec_benchmark_src_dir = os.path.join(submodules_dir, 'parsec-benchmark') parsec_benchmark_src_dir = os.path.join(submodules_dir, 'parsec-benchmark')
ccache_dir = os.path.join('/usr', 'lib', 'ccache') ccache_dir = os.path.join('/usr', 'lib', 'ccache')

10
run
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@@ -104,6 +104,14 @@ def main(args, extra_args=None):
if not os.path.exists(common.qcow2_file): if not os.path.exists(common.qcow2_file):
raise_rootfs_not_found() raise_rootfs_not_found()
common.raw_to_qcow2(prebuilt=args.prebuilt, reverse=True) common.raw_to_qcow2(prebuilt=args.prebuilt, reverse=True)
if not os.path.exists(common.vmlinux):
# This would allow us to run the prebuilt QEMU Linux image.
# but TODO cannot convert Image to vmlinux on aarch64:
# run-detectors: unable to find an interpreter for
if not os.path.exists(common.linux_image):
raise Exception('Linux kernel image not found. Did you compile it?\n' \
'Tried: ' + common.vmlinux)
assert common.run_cmd([os.path.join(common.extract_vmlinux, common.linux_image)]) == 0
os.makedirs(os.path.dirname(common.gem5_readfile), exist_ok=True) os.makedirs(os.path.dirname(common.gem5_readfile), exist_ok=True)
with open(common.gem5_readfile, 'w') as readfile: with open(common.gem5_readfile, 'w') as readfile:
readfile.write(args.gem5_readfile) readfile.write(args.gem5_readfile)
@@ -175,7 +183,7 @@ def main(args, extra_args=None):
qemu_executable = common.qemu_executable qemu_executable = common.qemu_executable
qemu_found = os.path.exists(qemu_executable) qemu_found = os.path.exists(qemu_executable)
if not qemu_found: if not qemu_found:
raise Exception('Could not find the QEMU executable, did you forget to build or install it?\n' \ raise Exception('QEMU executable not found, did you forget to build or install it?\n' \
'Tried to use: ' + qemu_executable) 'Tried to use: ' + qemu_executable)
if not os.path.exists(common.qcow2_file): if not os.path.exists(common.qcow2_file):
if not os.path.exists(common.rootfs_raw_file): if not os.path.exists(common.rootfs_raw_file):