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Ciro Santilli 六四事件 法轮功
2019-05-05 00:00:00 +00:00
parent 0ef494b681
commit aea97698c3
48 changed files with 840 additions and 798 deletions
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171
README.adoc
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@@ -977,23 +977,38 @@ Build, run and example, and clean it in-tree with:
....
cd userland
./build
./build c/hello
./c/hello.out
./build --clean
....
Source: link:userland/c/hello.c[].
Or build just one directory:
Build an entire directory:
....
./build c
....
or just one executable:
Build the current directory:
....
./build c/hello
./build
....
Note however that this would try to build the link:userland/libs/[] folder, which depends on certain libraries being installed on the host, e.g. <<blas>>.
You can install those libraries and do the build in one go with:
....
cd linux-kernel-module-cheat
./build --download-dependencies userland-host
....
If you modify a dependency that is not currently considered such as a header file, force the rebuild with:
....
./build --force-rebuild
....
Do a more clean out of tree build and run the program instead:
@@ -1003,11 +1018,7 @@ Do a more clean out of tree build and run the program instead:
"$(./getvar --userland-build-id host userland_build_dir)/hello.out"
....
If you modify a dependency that is not currently considered such as a header file, force the rebuild with:
....
./build --force-rebuild
....
Here we put the host executables in a separate <<build-variants,build-variant>> to avoid conflict with Buildroot builds.
===== Userland setup getting started full system
@@ -1699,7 +1710,7 @@ Alternatively, if the module panics before you can read `/proc/modules`, there i
....
echo 8 > /proc/sys/kernel/printk
echo 'file kernel/module.c +p' > /sys/kernel/debug/dynamic_debug/control
./myinsmod.out hello.ko
./linux/myinsmod.out hello.ko
....
And then search for a line of type:
@@ -1874,12 +1885,12 @@ Non-init process:
* Shell 2:
+
....
./run-gdb-user myinsmod main
./run-gdb-user linux/myinsmod main
....
* Shell 1 after the boot finishes:
+
....
./myinsmod.out hello.ko
./linux/myinsmod.out hello.ko
....
This is the least reliable setup as there might be other processes that use the given virtual address.
@@ -1995,10 +2006,10 @@ For a more minimal baremetal multicore setup, see: <<arm-multicore>>.
We can set and get which cores the Linux kernel allows a program to run on with `sched_getaffinity` and `sched_setaffinity`:
....
./run --cpus 2 --eval-after './sched_getaffinity.out'
./run --cpus 2 --eval-after './linux/sched_getaffinity.out'
....
Source: link:userland/sched_getaffinity.c[]
Source: link:userland/linux/sched_getaffinity.c[]
Sample output:
@@ -2025,7 +2036,7 @@ The number of cores is modified as explained at: <<number-of-cores>>
--config 'BR2_PACKAGE_UTIL_LINUX=y' \
--config 'BR2_PACKAGE_UTIL_LINUX_SCHEDUTILS=y' \
;
./run --eval-after 'taskset -c 1,1 ./sched_getaffinity.out'
./run --eval-after 'taskset -c 1,1 ./linux/sched_getaffinity.out'
....
output:
@@ -2041,20 +2052,20 @@ so we see that the affinity was restricted to the second core from the start.
Let's do a QEMU observation to justify this example being in the repository with <<gdb-step-debug-userland-non-init,userland breakpoints>>.
We will run our `./sched_getaffinity.out` infinitely many time, on core 0 and core 1 alternatively:
We will run our `./linux/sched_getaffinity.out` infinitely many time, on core 0 and core 1 alternatively:
....
./run \
--cpus 2 \
--wait-gdb \
--eval-after 'i=0; while true; do taskset -c $i,$i ./sched_getaffinity.out; i=$((! $i)); done' \
--eval-after 'i=0; while true; do taskset -c $i,$i ./linux/sched_getaffinity.out; i=$((! $i)); done' \
;
....
on another shell:
....
./run-gdb-user "$(./getvar userland_build_dir)/sched_getaffinity.out" main
./run-gdb-user "$(./getvar userland_build_dir)/linux/sched_getaffinity.out" main
....
Then, inside GDB:
@@ -2079,13 +2090,13 @@ We should also try it out with kernel modules: https://stackoverflow.com/questio
TODO we then tried:
....
./run --cpus 2 --eval-after './sched_getaffinity_threads.out'
./run --cpus 2 --eval-after './linux/sched_getaffinity_threads.out'
....
and:
....
./run-gdb-user "$(./getvar userland_build_dir)/sched_getaffinity_threads.out"
./run-gdb-user "$(./getvar userland_build_dir)/linux/sched_getaffinity_threads.out"
....
to switch between two simultaneous live threads with different affinities, it just didn't break on our threads:
@@ -2431,10 +2442,10 @@ First build `gdbserver` into the root filesystem:
./build-buildroot --config 'BR2_PACKAGE_GDB=y'
....
Then on guest, to debug link:userland/myinsmod.c[]:
Then on guest, to debug link:userland/linux/myinsmod.c[]:
....
./gdbserver.sh ./myinsmod.out hello.ko
./gdbserver.sh ./linux/myinsmod.out hello.ko
....
Source: link:rootfs_overlay/lkmc/gdbserver.sh[].
@@ -2442,13 +2453,13 @@ Source: link:rootfs_overlay/lkmc/gdbserver.sh[].
And on host:
....
./run-gdbserver myinsmod
./run-gdbserver linux/myinsmod
....
or alternatively with the full path:
....
./run-gdbserver "$(./getvar userland_build_dir)/myinsmod.out"
./run-gdbserver "$(./getvar userland_build_dir)/linux/myinsmod.out"
....
https://reverseengineering.stackexchange.com/questions/8829/cross-debugging-for-arm-mips-elf-with-qemu-toolchain/16214#16214
@@ -2587,7 +2598,7 @@ traps: ring0.out[55] general protection ip:40054c sp:7fffffffec20 error:0 in rin
Sources:
* link:kernel_modules/ring0.c[]
* link:kernel_modules/ring0.h[]
* link:include/ring0.h[]
* link:userland/ring0.c[]
In both cases, we attempt to run the exact same code which is shared on the `ring0.h` header file.
@@ -2832,14 +2843,14 @@ ____
And you can try it out with:
....
./run --kernel-cli 'init=/lkmc/init_env_poweroff.out - asdf=qwer zxcv'
./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out - asdf=qwer zxcv'
....
Output:
....
args:
/lkmc/init_env_poweroff.out
/lkmc/linux/init_env_poweroff.out
-
zxcv
@@ -2849,7 +2860,7 @@ TERM=linux
asdf=qwer
....
Source: link:userland/init_env_poweroff.c[].
Source: link:userland/linux/init_env_poweroff.c[].
==== init arguments
@@ -2858,14 +2869,14 @@ The annoying dash `-` gets passed as a parameter to `init`, which makes it impos
Arguments with dots that come after `-` are still treated specially (of the form `subsystem.somevalue`) and disappear, from args, e.g.:
....
./run --kernel-cli 'init=/lkmc/init_env_poweroff.out - /lkmc/linux/poweroff.out'
./run --kernel-cli 'init=/lkmc/linux/init_env_poweroff.out - /lkmc/linux/poweroff.out'
....
outputs:
....
args
/lkmc/init_env_poweroff.out
/lkmc/linux/init_env_poweroff.out
-
ab
....
@@ -3380,12 +3391,12 @@ See also: <<user-mode-simulation-with-glibc>>
=== QEMU user mode getting started
Let's run link:userland/print_argv.c[] built with the Buildroot toolchain on QEMU user mode:
Let's run link:userland/c/print_argv.c[] built with the Buildroot toolchain on QEMU user mode:
....
./build user-mode-qemu
./run \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
;
....
@@ -3413,12 +3424,12 @@ The commands are analogous to full system <<gdb>>, e.g. without tmux:
....
./run \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
--wait-gdb \
;
./run-gdb \
--userland print_argv \
--userland c/print_argv \
main
;
....
@@ -3427,7 +3438,7 @@ or with <<tmux>>:
....
./run \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
--tmux-args main \
--wait-gdb \
@@ -3449,7 +3460,7 @@ sudo apt-get install gcc-aarch64-linux-gnu qemu-system-aarch64
--arch aarch64 \
--qemu-which host
--userland-build-id host \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
;
....
@@ -3544,7 +3555,7 @@ Example:
./run \
--arch aarch64 \
--static \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
;
....
@@ -3567,7 +3578,7 @@ So programs that rely on those libraries might not compile as GCC can't find the
For example, if we try to build <<blas>> statically:
....
./build-userland --has-package openblas --static -- libs/openblas_hello
./build-userland --has-package openblas --static -- libs/openblas/hello
....
it fails with:
@@ -3583,7 +3594,7 @@ It's nice when <<gdb,the obvious>> just works, right?
....
./run \
--arch aarch64 \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
--wait-gdb \
;
@@ -3594,7 +3605,7 @@ and on another shell:
....
./run-gdb \
--arch aarch64 \
--userland print_argv \
--userland c/print_argv \
main \
;
....
@@ -3605,7 +3616,7 @@ Or alternatively, if you are using <<tmux>>, do everything in one go with:
./run \
--arch aarch64 \
--tmux-args main \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
--wait-gdb \
;
@@ -3643,7 +3654,7 @@ So let's just play with some static ones:
./run \
--arch aarch64 \
--emulator gem5 \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
;
....
@@ -3657,7 +3668,7 @@ TODO: how to escape spaces on the command line arguments?
--arch aarch64 \
--emulator gem5 \
--static \
--userland print_argv \
--userland c/print_argv \
--userland-args 'asdf "qw er"' \
--wait-gdb \
;
@@ -3665,7 +3676,7 @@ TODO: how to escape spaces on the command line arguments?
--arch aarch64 \
--emulator gem5 \
--static \
--userland print_argv \
--userland c/print_argv \
main \
;
....
@@ -3794,18 +3805,18 @@ If you are feeling raw, you can insert and remove modules with our own minimal m
....
# init_module
./myinsmod.out hello.ko
./linux/myinsmod.out hello.ko
# finit_module
./myinsmod.out hello.ko "" 1
./myrmmod.out hello
./linux/myinsmod.out hello.ko "" 1
./linux/myrmmod.out hello
....
which teaches you how it is done from C code.
Source:
* link:userland/myinsmod.c[]
* link:userland/myrmmod.c[]
* link:userland/linux/myinsmod.c[]
* link:userland/linux/myrmmod.c[]
The Linux kernel offers two system calls for module insertion:
@@ -5252,7 +5263,7 @@ But the awesome `CONFIG_DYNAMIC_DEBUG=y` option which we enable by default allow
....
echo 8 > /proc/sys/kernel/printk
echo 'file kernel/module.c +p' > /sys/kernel/debug/dynamic_debug/control
./myinsmod.out hello.ko
./linux/myinsmod.out hello.ko
....
and we have a shortcut at:
@@ -6375,7 +6386,7 @@ Outcome: `jiffies` gets printed to stdout every second from userland.
Sources:
* link:kernel_modules/poll.c[]
* link:kernel_modules/poll.c[]
* link:include/poll.h[]
* link:rootfs_overlay/lkmc/poll.sh[]
Typically, we are waiting for some hardware to make some piece of data available available to the kernel.
@@ -6404,8 +6415,8 @@ Outcome: the test passes:
Sources:
* link:kernel_modules/ioctl.c[]
* link:kernel_modules/ioctl.h[]
* link:userland/ioctl.c[]
* link:include/ioctl.h[]
* link:userland/kernel_modules/ioctl.c[]
* link:rootfs_overlay/lkmc/ioctl.sh[]
`ioctl` is one of the most important methods of communication with real device drivers, which often take several fields as input.
@@ -6489,8 +6500,8 @@ Outcome: the test passes:
Sources:
* link:kernel_modules/anonymous_inode.c[]
* link:kernel_modules/anonymous_inode.h[]
* link:userland/anonymous_inode.c[]
* link:include/anonymous_inode.h[]
* link:userland/kernel_modules/anonymous_inode.c[]
* link:rootfs_overlay/lkmc/anonymous_inode.sh[]
This example gets an anonymous inode via <<ioctl>> from a debugfs entry by using `anon_inode_getfd`.
@@ -6517,8 +6528,8 @@ Outcome: the test passes:
Sources:
* link:kernel_modules/netlink.c[]
* link:kernel_modules/netlink.h[]
* link:userland/netlink.c[]
* link:include/netlink.h[]
* link:userland/kernel_modules/netlink.c[]
* link:rootfs_overlay/lkmc/netlink.sh[]
Launch multiple user requests in parallel to stress our socket:
@@ -6993,10 +7004,10 @@ In this section we will play with them.
First get a virtual address to play with:
....
./virt_to_phys_test.out &
./posix/virt_to_phys_test.out &
....
Source: link:userland/virt_to_phys_test.c[]
Source: link:userland/posix/virt_to_phys_test.c[]
Sample output:
@@ -7091,7 +7102,7 @@ After one second, we see on the screen:
....
i 9abcdef0
[1]+ Done ./virt_to_phys_test.out
[1]+ Done ./posix/virt_to_phys_test.out
....
so the value changed, and the `while` loop exited!
@@ -7116,7 +7127,7 @@ Dump the physical address of all pages mapped to a given process using `/proc/<p
First launch `linux/virt_to_phys_user.out` as described at <<userland-physical-address-experiments>>. Suppose that the output was:
....
# ./virt_to_phys_test.out &
# ./posix/virt_to_phys_test.out &
vaddr 0x601048
pid 63
# ./linux/virt_to_phys_user.out 63 0x601048
@@ -7133,9 +7144,9 @@ Sample output excerpt:
....
vaddr pfn soft-dirty file/shared swapped present library
400000 1ede 0 1 0 1 ./virt_to_phys_test.out
600000 1a6f 0 0 0 1 ./virt_to_phys_test.out
601000 1a61 0 0 0 1 ./virt_to_phys_test.out
400000 1ede 0 1 0 1 ./posix/virt_to_phys_test.out
600000 1a6f 0 0 0 1 ./posix/virt_to_phys_test.out
601000 1a61 0 0 0 1 ./posix/virt_to_phys_test.out
602000 2208 0 0 0 1 [heap]
603000 220b 0 0 0 1 [heap]
7ffff78ec000 1fd4 0 1 0 1 /lib/libuClibc-1.0.30.so
@@ -7150,7 +7161,7 @@ Meaning of the flags:
* `vaddr`: first virtual address of a page the belongs to the process. Notably:
+
....
./run-toolchain readelf -- -l "$(./getvar userland_build_dir)/virt_to_phys_test.out"
./run-toolchain readelf -- -l "$(./getvar userland_build_dir)/posix/virt_to_phys_test.out"
....
+
contains:
@@ -7222,7 +7233,7 @@ Logs proc events such as process creation to a link:kernel_modules/netlink.c[net
We then have a userland program that listens to the events and prints them out:
....
# ./proc_events.out &
# ./linux/proc_events.out &
# set mcast listen ok
# sleep 2 & sleep 1
fork: parent tid=48 pid=48 -> child tid=79 pid=79
@@ -7236,7 +7247,7 @@ a
#
....
Source: link:userland/proc_events.c[]
Source: link:userland/linux/proc_events.c[]
TODO: why `exit: tid=79` shows after `exit: tid=80`?
@@ -7245,7 +7256,7 @@ Note how `echo a` is a Bash built-in, and therefore does not spawn a new process
TODO: why does this produce no output?
....
./proc_events.out >f &
./linux/proc_events.out >f &
....
* https://stackoverflow.com/questions/6075013/detect-launching-of-programs-on-linux-platform/8255487#8255487
@@ -7725,7 +7736,7 @@ UIO interface in a nutshell:
Sources:
* link:userland/uio_read.c[]
* link:userland/kernel_modules/uio_read.c[]
* link:rootfs_overlay/lkmc/uio_read.sh[]
Bibliography:
@@ -8169,8 +8180,8 @@ DRM / DRI is the new interface that supersedes `fbdev`:
....
./build-buildroot --config 'BR2_PACKAGE_LIBDRM=y'
./build-userland --has-package libdrm -- libs/libdrm_modeset
./run --eval-after './libs/libdrm_modeset.out' --graphic
./build-userland --has-package libdrm -- libs/libdrm/modeset
./run --eval-after './libs/libdrm/modeset.out' --graphic
....
Source: link:userland/libs/libdrm_modeset.c[]
@@ -8183,7 +8194,7 @@ TODO not working for `aarch64`, it takes over the screen for a few seconds and t
./build-buildroot --config 'BR2_PACKAGE_LIBDRM=y'
./build-userland --has-package libdrm
./build-buildroot
./run --eval-after './libs/libdrm_modeset.out' --graphic
./run --eval-after './libs/libdrm/modeset.out' --graphic
....
<<kmscube>> however worked, which means that it must be a bug with this demo?
@@ -8208,7 +8219,7 @@ Try creating new displays:
to see multiple `/dev/dri/cardN`, and then use a different display with:
....
./run --eval-after './libs/libdrm_modeset.out' --graphic
./run --eval-after './libs/libdrm/modeset.out' --graphic
....
Bibliography:
@@ -9909,8 +9920,8 @@ Buildroot supports it, which makes everything just trivial:
....
./build-buildroot --config 'BR2_PACKAGE_OPENBLAS=y'
./build-userland --has-package openblas -- libs/openblas_hello
./run --eval-after './libs/openblas_hello.out; echo $?'
./build-userland --has-package openblas -- libs/openblas/hello
./run --eval-after './libs/openblas/hello.out; echo $?'
....
Outcome: the test passes:
@@ -9919,7 +9930,7 @@ Outcome: the test passes:
0
....
Source: link:userland/libs/openblas.c[]
Source: link:userland/libs/openblas/hello.c[]
The test performs a general matrix multiplication:
@@ -9949,13 +9960,13 @@ Header only linear algebra library with a mainline Buildroot package:
....
./build-buildroot --config 'BR2_PACKAGE_EIGEN=y'
./build-userland --has-package eigen -- libs/eigen_hello
./build-userland --has-package eigen -- libs/eigen/hello
....
Just create an array and print it:
....
./run --eval-after './libs/eigen_hello.out'
./run --eval-after './libs/eigen/hello.out'
....
Output:
@@ -9965,7 +9976,7 @@ Output:
2.5 1.5
....
Source: link:userland/libs/eigen_hello.cpp[]
Source: link:userland/libs/eigen/hello.cpp[]
This example just creates a matrix and prints it out.
@@ -10192,7 +10203,7 @@ The alternative is to do as in <<gdb-step-debug-userland-processes>>.
Next, follow the exact same steps explained at <<gdb-step-debug-userland-non-init-without--d>>, but passing `-g` to every command as usual.
But then TODO (I'll still go crazy one of those days): for `arm`, while debugging `./myinsmod.out hello.ko`, after then line:
But then TODO (I'll still go crazy one of those days): for `arm`, while debugging `./linux/myinsmod.out hello.ko`, after then line:
....
23 if (argc < 3) {

8
build
View File

@@ -339,6 +339,14 @@ so looping over all of them would waste time.
self._build_file('build-userland'),
dependencies=['buildroot'],
),
'userland-host': _Component(
self._build_file('build-userland'),
apt_get_pkgs={
'libdrm-dev',
'libeigen3-dev',
'libopenblas-dev',
},
),
'userland-gem5': _Component(
self._build_file('build-userland', static=True, userland_build_id='static'),
dependencies=['buildroot'],

185
build-userland
View File

@@ -25,6 +25,13 @@ Build our compiled userland examples.
help='''\
Indicate that a given package is present in the root filesystem, which
allows us to build examples that rely on it.
''',
)
self.add_argument(
'--has-all-packages',
action='store_true',
help='''\
Indicate that all packages from --has-package are available.
''',
)
self.add_argument(
@@ -138,6 +145,7 @@ Default: build all examples that have their package dependencies met, e.g.:
def build(self):
build_dir = self.get_build_dir()
has_packages = set(self.env['has_package'])
has_all_packages = self.env['has_all_packages']
ccflags = [
'-I', self.env['root_dir'], LF,
'-O0', LF,
@@ -179,6 +187,10 @@ Default: build all examples that have their package dependencies met, e.g.:
extra_deps=[self.env['common_h']],
link=False,
)
if self.env['gcc_which'] == 'host':
eigen_root = '/'
else:
eigen_root = self.env['buildroot_staging_dir']
pkgs = {
'eigen': {
# TODO: was failing with:
@@ -188,7 +200,7 @@ Default: build all examples that have their package dependencies met, e.g.:
'ccflags': [
'-I',
os.path.join(
self.env['buildroot_staging_dir'],
eigen_root,
'usr',
'include',
'eigen3'
@@ -217,26 +229,19 @@ Default: build all examples that have their package dependencies met, e.g.:
dirpath_relative_root = path_abs[rootdir_abs_len + 1:]
dirpath_relative_root_components = dirpath_relative_root.split(os.sep)
dirpath_relative_root_components_len = len(dirpath_relative_root_components)
do_build_dir = True
in_arch = False
out_dir = os.path.join(
build_dir,
dirpath_relative_root
)
common_objs_dir = [common_obj]
ccflags_after = []
ccflags_dir = ccflags.copy()
if dirpath_relative_root_components_len > 0:
if dirpath_relative_root_components[0] == 'arch':
if dirpath_relative_root_components_len > 1:
if dirpath_relative_root_components[1] == self.env['arch']:
in_arch = True
else:
do_build_dir = False
else:
do_build_dir = False
in_libs = dirpath_relative_root_components[0] == 'libs'
if do_build_dir:
out_dir = os.path.join(
build_dir,
dirpath_relative_root
)
common_objs_dir = [common_obj]
ccflags_dir = ccflags.copy()
if dirpath_relative_root_components in ('gcc', 'kernel_modules', 'linux'):
if dirpath_relative_root_components[0] in (
'gcc',
'kernel_modules',
'linux',
):
cstd = 'gnu11'
cxxstd = 'gnu++17'
else:
@@ -244,90 +249,94 @@ Default: build all examples that have their package dependencies met, e.g.:
cxxstd = self.default_cxxstd
# -pedantic complains even if we use -std=gnu11.
ccflags_dir.extend(['-pedantic', LF])
if in_arch:
ccflags_dir.extend([
'-I', os.path.join(self.env['userland_source_arch_arch_dir']), LF,
'-I', os.path.join(self.env['userland_source_arch_dir']), LF,
'-fno-pie', LF,
'-no-pie', LF,
])
if 'freestanding' in dirpath_relative_root_components:
common_objs_dir = []
ccflags_dir.extend([
'-ffreestanding', LF,
'-nostdlib', LF,
'-static', LF,
])
else:
if 'c' in dirpath_relative_root_components:
common_objs_dir = []
if dirpath_relative_root_components[0] == 'arch':
if dirpath_relative_root_components_len > 1:
if dirpath_relative_root_components[1] == self.env['arch']:
ccflags_dir.extend([
'-I', os.path.join(self.env['userland_source_arch_arch_dir']), LF,
'-I', os.path.join(self.env['userland_source_arch_dir']), LF,
'-fno-pie', LF,
'-no-pie', LF,
])
if 'freestanding' in dirpath_relative_root_components:
common_objs_dir = []
ccflags_dir.extend([
'-ffreestanding', LF,
'-nostdlib', LF,
'-static', LF,
])
else:
if 'c' in dirpath_relative_root_components:
common_objs_dir = []
else:
common_objs_dir = [common_obj_asm]
if self.env['arch'] == 'arm':
ccflags_dir.extend([
'-Xassembler', '-mcpu=cortex-a72', LF,
# To prevent:
# > vfp.S: Error: selected processor does not support <FPU instruction> in ARM mode
# https://stackoverflow.com/questions/41131432/cross-compiling-error-selected-processor-does-not-support-fmrx-r3-fpexc-in/52875732#52875732
# We aim to take the most extended mode currently available that works on QEMU.
'-Xassembler', '-mfpu=crypto-neon-fp-armv8.1', LF,
'-Xassembler', '-meabi=5', LF,
# Treat inline assembly as arm instead of thumb
# The opposite of -mthumb.
'-marm', LF,
# Make gcc generate .syntax unified for inline assembly.
# However, it gets ignored if -marm is given, which a GCC bug that was recently fixed:
# https://stackoverflow.com/questions/54078112/how-to-write-syntax-unified-ual-armv7-inline-assembly-in-gcc/54132097#54132097
# So we just write divided inline assembly for now.
'-masm-syntax-unified', LF,
])
else:
common_objs_dir = [common_obj_asm]
if self.env['arch'] == 'arm':
ccflags_dir.extend([
'-Xassembler', '-mcpu=cortex-a72', LF,
# To prevent:
# > vfp.S: Error: selected processor does not support <FPU instruction> in ARM mode
# https://stackoverflow.com/questions/41131432/cross-compiling-error-selected-processor-does-not-support-fmrx-r3-fpexc-in/52875732#52875732
# We aim to take the most extended mode currently available that works on QEMU.
'-Xassembler', '-mfpu=crypto-neon-fp-armv8.1', LF,
'-Xassembler', '-meabi=5', LF,
# Treat inline assembly as arm instead of thumb
# The opposite of -mthumb.
'-marm', LF,
# Make gcc generate .syntax unified for inline assembly.
# However, it gets ignored if -marm is given, which a GCC bug that was recently fixed:
# https://stackoverflow.com/questions/54078112/how-to-write-syntax-unified-ual-armv7-inline-assembly-in-gcc/54132097#54132097
# So we just write divided inline assembly for now.
'-masm-syntax-unified', LF,
])
for in_filename in in_filenames:
path_relative_root = os.path.join(dirpath_relative_root, in_filename)
if path_relative_root == common_obj_asm_relpath:
continue
in_path = os.path.join(path, in_filename)
in_name, in_ext = os.path.splitext(in_filename)
out_path = os.path.join(
out_dir,
in_name + self.env['userland_build_ext']
)
ccflags_file = ccflags_dir.copy()
ccflags_after = []
if in_libs:
pkg_key = in_name.split('_')[0]
if pkg_key in pkgs:
if pkg_key not in has_packages:
continue
else:
continue
elif dirpath_relative_root_components[0] == 'libs':
if dirpath_relative_root_components_len > 1:
pkg_key = dirpath_relative_root_components[1]
if not (has_all_packages or pkg_key in has_packages):
continue
pkg = pkgs[pkg_key]
if 'ccflags' in pkg:
ccflags_file.extend(pkg['ccflags'])
ccflags_dir.extend(pkg['ccflags'])
else:
pkg_config_output = subprocess.check_output([
self.env['buildroot_pkg_config'],
self.env['pkg_config'],
'--cflags',
pkg_key
]).decode()
ccflags_file.extend(self.sh.shlex_split(pkg_config_output))
ccflags_dir.extend(self.sh.shlex_split(pkg_config_output))
if 'ccflags_after' in pkg:
ccflags_file.extend(pkg['ccflags_after'])
ccflags_dir.extend(pkg['ccflags_after'])
else:
pkg_config_output = subprocess.check_output([
self.env['buildroot_pkg_config'],
self.env['pkg_config'],
'--libs',
pkg_key
]).decode()
ccflags_after.extend(self.sh.shlex_split(pkg_config_output))
error = thread_pool.submit({
'in_path': in_path,
'out_path': out_path,
'ccflags': ccflags_file,
'cstd': cstd,
'cxxstd': cxxstd,
'extra_objs': common_objs_dir,
'ccflags_after': ccflags_after,
})
if error is not None:
raise ExitLoop()
for in_filename in in_filenames:
path_relative_root = os.path.join(dirpath_relative_root, in_filename)
if path_relative_root == common_obj_asm_relpath:
continue
in_path = os.path.join(path, in_filename)
in_name, in_ext = os.path.splitext(in_filename)
out_path = os.path.join(
out_dir,
in_name + self.env['userland_build_ext']
)
error = thread_pool.submit({
'in_path': in_path,
'out_path': out_path,
'ccflags': ccflags_dir,
'cstd': cstd,
'cxxstd': cxxstd,
'extra_objs': common_objs_dir,
'ccflags_after': ccflags_after,
})
if error is not None:
raise ExitLoop()
except ExitLoop:
pass
error = thread_pool.join()

1
build-userland-in-tree
View File

@@ -1,6 +1,7 @@
#!/usr/bin/env bash
"$(git rev-parse --show-toplevel)/build-userland" \
--gcc-which host \
--has-all-packages \
--in-tree \
--target-cwd \
"$@" \

5
common.py
View File

@@ -10,7 +10,6 @@ import imp
import inspect
import json
import math
import multiprocessing
import os
import platform
import re
@@ -824,6 +823,7 @@ lunch aosp_{}-eng
env['buildroot_toolchain_prefix']
)
env['userland_library_dir'] = env['buildroot_target_dir']
env['pkg_config'] = env['buildroot_pkg_config']
elif env['gcc_which'] == 'crosstool-ng':
env['toolchain_prefix'] = os.path.join(
env['crosstool_ng_bin_dir'],
@@ -837,6 +837,7 @@ lunch aosp_{}-eng
env['userland_library_dir'] = '/usr/arm-linux-gnueabihf'
elif env['arch'] == 'aarch64':
env['userland_library_dir'] = '/usr/aarch64-linux-gnu/'
env['pkg_config'] = 'pkg-config'
elif env['gcc_which'] == 'host-baremetal':
if env['arch'] == 'arm':
env['toolchain_prefix'] = 'arm-none-eabi'
@@ -1249,7 +1250,7 @@ TODO: not yet implemented on all scripts.
self.add_argument(
'-j',
'--nproc',
default=multiprocessing.cpu_count(),
default=len(os.sched_getaffinity(0)),
type=int,
help='Number of processors to use for the build.',
)

0
rootfs_overlay/lkmc/README.adoc → rootfs_overlay/README.adoc
View File

3
rootfs_overlay/lkmc/anonymous_inode.sh
View File

@@ -1,5 +1,6 @@
#!/bin/sh
# https://github.com/cirosantilli/linux-kernel-module-cheat#anonymous-inode
set -e
insmod anonymous_inode.ko
[ "$(/anonymous_inode.out /sys/kernel/debug/lkmc_anonymous_inode 3)" = "$(printf '1\n10\n100')" ]
[ "$(./kernel_modules/anonymous_inode.out /sys/kernel/debug/lkmc_anonymous_inode 3)" = "$(printf '1\n10\n100')" ]
rmmod anonymous_inode

5
rootfs_overlay/lkmc/ioctl.sh
View File

@@ -1,7 +1,8 @@
#!/bin/sh
# https://github.com/cirosantilli/linux-kernel-module-cheat#ioctl
set -e
f=/sys/kernel/debug/lkmc_ioctl
insmod ioctl.ko
[ "$(/ioctl.out "$f" 0 1)" = 2 ]
[ "$(/ioctl.out "$f" 1 1 1)" = '2 0' ]
[ "$(./kernel_modules/ioctl.out "$f" 0 1)" = 2 ]
[ "$(./kernel_modules/ioctl.out "$f" 1 1 1)" = '2 0' ]
rmmod ioctl

7
rootfs_overlay/lkmc/netlink.sh
View File

@@ -1,7 +1,8 @@
#!/bin/sh
# https://github.com/cirosantilli/linux-kernel-module-cheat#netlink-sockets
set -e
insmod netlink.ko
[ "$(/netlink.out)" = 0 ]
[ "$(/netlink.out)" = 1 ]
[ "$(/netlink.out)" = 2 ]
[ "$(./linux/netlink.out)" = 0 ]
[ "$(./linux/netlink.out)" = 1 ]
[ "$(./linux/netlink.out)" = 2 ]
rmmod netlink

3
rootfs_overlay/lkmc/poll.sh
View File

@@ -1,5 +1,6 @@
#!/bin/sh
# https://github.com/cirosantilli/linux-kernel-module-cheat#poll
set -e
insmod poll.ko
./poll.out /sys/kernel/debug/lkmc_poll
./kernel_modules/poll.out /sys/kernel/debug/lkmc_poll
#rmmod poll

2
rootfs_overlay/lkmc/uio_read.sh
View File

@@ -4,7 +4,7 @@ set -e
modprobe uio_pci_generic
# pci_min device
echo '1234 11e9' > /sys/bus/pci/drivers/uio_pci_generic/new_id
./uio_read.out &
./kernel_modules/uio_read.out &
# Helper to observe interrupts.
insmod irq.ko
base="$(setpci -d 1234:11e9 BASE_ADDRESS_0)"

3
thread_pool.py
View File

@@ -1,7 +1,6 @@
#!/usr/bin/env python3
from typing import Any, Callable, Dict, Iterable, Union
import multiprocessing
import queue
import sys
import threading
@@ -66,7 +65,7 @@ class ThreadPool:
handle_output = lambda input, output, exception: exception
self.handle_output = handle_output
if nthreads is None:
nthreads = multiprocessing.cpu_count()
nthreads = len(os.sched_getaffinity(0))
self.nthreads = nthreads
self.error_output = None
self.error_output_lock = threading.Lock()

46
userland/anonymous_inode.c
View File

@@ -1,46 +0,0 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#anonymous-inode */
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h> /* sleep */
#include "../include/anonymous_inode.h"
int main(int argc, char **argv)
{
char buf[1024];
int fd_ioctl, fd_ioctl_anon, ret;
size_t i, nreads;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file> [<nreads>]");
return EXIT_FAILURE;
} else if (argc > 2) {
nreads = strtol(argv[2], NULL, 10);
} else {
nreads = 3;
}
fd_ioctl = open(argv[1], O_RDONLY);
if (fd_ioctl == -1) {
perror("open");
return EXIT_FAILURE;
}
ret = ioctl(fd_ioctl, LKMC_ANONYMOUS_INODE_GET_FD, &fd_ioctl_anon);
if (ret == -1) {
perror("ioctl");
return EXIT_FAILURE;
}
for (i = 0; i < nreads; ++i) {
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
}
close(fd_ioctl_anon);
close(fd_ioctl);
return EXIT_SUCCESS;
}

8
userland/arch/aarch64/common_arch.h
View File

@@ -5,13 +5,13 @@
#define ASSERT_EQ(reg, const) \
ldr x11, =const; \
cmp reg, x11; \
ASSERT(beq); \
cmp reg, x11; \
ASSERT(beq); \
;
#define ASSERT_MEMCMP(s1, s2, n) \
MEMCMP(s1, s2, n); \
ASSERT_EQ(x0, 0); \
MEMCMP(s1, s2, n); \
ASSERT_EQ(x0, 0); \
;
#define ENTRY \

8
userland/arch/arm/common_arch.h
View File

@@ -12,14 +12,14 @@
*/
#define ASSERT_EQ(reg, const) \
ldr r11, =const; \
cmp reg, r11; \
ASSERT(beq); \
cmp reg, r11; \
ASSERT(beq); \
;
/* Assert that two arrays are the same. */
#define ASSERT_MEMCMP(s1, s2, n) \
MEMCMP(s1, s2, n); \
ASSERT_EQ(r0, 0); \
MEMCMP(s1, s2, n); \
ASSERT_EQ(r0, 0); \
;
/* Store all callee saved registers, and LR in case we make further BL calls.

4
userland/arch/common.h
View File

@@ -23,8 +23,8 @@
/* Assert that a register equals another register. */
#define ASSERT_EQ_REG(reg1, reg2) \
cmp reg1, reg2; \
ASSERT(beq); \
cmp reg1, reg2; \
ASSERT(beq); \
;
#endif

22
userland/arch/x86_64/c/binutils_hack.c
View File

@@ -5,16 +5,16 @@
int main(void) {
#if 0
uint64_t in = 0xFFFFFFFF;
uint64_t out = 0;
__asm__ (
"mov %[in], %%rax;"
"myinc %%rax;"
"movq %%rax, %[out]"
: [out] "=g" (out)
: [in] "g" (in)
: "rax"
);
assert(out == in + 1);
uint64_t in = 0xFFFFFFFF;
uint64_t out = 0;
__asm__ (
"mov %[in], %%rax;"
"myinc %%rax;"
"movq %%rax, %[out]"
: [out] "=g" (out)
: [in] "g" (in)
: "rax"
);
assert(out == in + 1);
#endif
}

22
userland/arch/x86_64/c/binutils_nohack.c
View File

@@ -4,15 +4,15 @@
#include <inttypes.h>
int main(void) {
uint64_t in = 0xFFFFFFFF;
uint64_t out = 0;
__asm__ (
"mov %[in], %%rax;"
"inc %%rax;"
"movq %%rax, %[out]"
: [out] "=g" (out)
: [in] "g" (in)
: "rax"
);
assert(out == in + 1);
uint64_t in = 0xFFFFFFFF;
uint64_t out = 0;
__asm__ (
"mov %[in], %%rax;"
"inc %%rax;"
"movq %%rax, %[out]"
: [out] "=g" (out)
: [in] "g" (in)
: "rax"
);
assert(out == in + 1);
}

14
userland/bst_vs_heap.cpp
View File

@@ -29,16 +29,16 @@ int main(int argc, char **argv) {
}
std::shuffle(randoms.begin(), randoms.end(), std::mt19937(seed));
for (i = 0; i < n; ++i) {
auto random = randoms[i];
auto random = randoms[i];
// Heap.
m5_resetstats();
heap.emplace(random);
m5_dumpstats();
m5_resetstats();
heap.emplace(random);
m5_dumpstats();
// BST.
m5_resetstats();
bst.insert(random);
m5_dumpstats();
m5_resetstats();
bst.insert(random);
m5_dumpstats();
}
}

2
userland/c/false.c
View File

@@ -13,5 +13,5 @@ int main(int argc, char **argv) {
} else {
ret = strtoull(argv[1], NULL, 0);
}
return ret;
return ret;
}

4
userland/c/hello.c
View File

@@ -4,6 +4,6 @@
#include <stdlib.h>
int main(void) {
puts("hello");
return EXIT_SUCCESS;
puts("hello");
return EXIT_SUCCESS;
}

14
userland/c/print_argv.c Normal file
View File

@@ -0,0 +1,14 @@
/* Print each command line argument received, one per line.
*
* Good sanity check for user mode:
* https://github.com/cirosantilli/linux-kernel-module-cheat#qemu-user-mode-getting-started
*/
#include <stdio.h>
int main(int argc, char **argv) {
size_t i;
for (i = 0; i < (size_t)argc; ++i)
printf("%s\n", argv[i]);
return 0;
}

6
userland/common.h
View File

@@ -26,8 +26,7 @@ typedef struct {
* @param[in] vaddr virtual address to get entry for
* @return 0 for success, 1 for failure
*/
int pagemap_get_entry(PagemapEntry *entry, int pagemap_fd, uintptr_t vaddr)
{
int pagemap_get_entry(PagemapEntry *entry, int pagemap_fd, uintptr_t vaddr) {
size_t nread;
ssize_t ret;
uint64_t data;
@@ -62,8 +61,7 @@ int pagemap_get_entry(PagemapEntry *entry, int pagemap_fd, uintptr_t vaddr)
* @param[in] vaddr virtual address to get entry for
* @return 0 for success, 1 for failure
*/
int virt_to_phys_user(uintptr_t *paddr, pid_t pid, uintptr_t vaddr)
{
int virt_to_phys_user(uintptr_t *paddr, pid_t pid, uintptr_t vaddr) {
char pagemap_file[BUFSIZ];
int pagemap_fd;

26
userland/init_env_poweroff.c
View File

@@ -1,26 +0,0 @@
#define _XOPEN_SOURCE 700
#include <stdio.h>
#include <sys/reboot.h>
#include <unistd.h>
int main(int argc, char **argv)
{
int i;
puts("args:");
for (i = 0; i < argc; ++i)
puts(argv[i]);
puts("");
puts("env:");
extern char **environ;
char **env = environ;
while (*env) {
printf("%s\n", *env);
env++;
}
puts("");
/* Poweroff. */
reboot(RB_POWER_OFF);
}

67
userland/ioctl.c
View File

@@ -1,67 +0,0 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#ioctl */
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "../include/ioctl.h"
int main(int argc, char **argv)
{
char *ioctl_path;
int fd, request, arg0, arg1, arg_int, ret;
lkmc_ioctl_struct arg_struct;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file> <request> [<arg>...]");
return EXIT_FAILURE;
}
ioctl_path = argv[1];
request = strtol(argv[2], NULL, 10);
if (argc > 3) {
arg0 = strtol(argv[3], NULL, 10);
}
if (argc > 4) {
arg1 = strtol(argv[4], NULL, 10);
}
fd = open(ioctl_path, O_RDONLY);
if (fd == -1) {
perror("open");
return EXIT_FAILURE;
}
switch (request)
{
case 0:
arg_int = arg0;
ret = ioctl(fd, LKMC_IOCTL_INC, &arg_int);
if (ret != -1) {
printf("%d\n", arg_int);
}
break;
case 1:
arg_struct.i = arg0;
arg_struct.j = arg1;
ret = ioctl(fd, LKMC_IOCTL_INC_DEC, &arg_struct);
if (ret != -1) {
printf("%d %d\n", arg_struct.i, arg_struct.j);
}
break;
default:
puts("error: unknown request");
return EXIT_FAILURE;
}
if (ret == -1) {
perror("ioctl");
printf("errno = %d\n", errno);
return EXIT_FAILURE;
}
close(fd);
return EXIT_SUCCESS;
}

45
userland/kernel_modules/anonymous_inode.c Normal file
View File

@@ -0,0 +1,45 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#anonymous-inode */
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h> /* sleep */
#include <include/anonymous_inode.h>
int main(int argc, char **argv) {
char buf[1024];
int fd_ioctl, fd_ioctl_anon, ret;
size_t i, nreads;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file> [<nreads>]");
return EXIT_FAILURE;
} else if (argc > 2) {
nreads = strtol(argv[2], NULL, 10);
} else {
nreads = 3;
}
fd_ioctl = open(argv[1], O_RDONLY);
if (fd_ioctl == -1) {
perror("open");
return EXIT_FAILURE;
}
ret = ioctl(fd_ioctl, LKMC_ANONYMOUS_INODE_GET_FD, &fd_ioctl_anon);
if (ret == -1) {
perror("ioctl");
return EXIT_FAILURE;
}
for (i = 0; i < nreads; ++i) {
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
}
close(fd_ioctl_anon);
close(fd_ioctl);
return EXIT_SUCCESS;
}

66
userland/kernel_modules/ioctl.c Normal file
View File

@@ -0,0 +1,66 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#ioctl */
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <include/ioctl.h>
int main(int argc, char **argv) {
char *ioctl_path;
int fd, request, arg0, arg1, arg_int, ret;
lkmc_ioctl_struct arg_struct;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file> <request> [<arg>...]");
return EXIT_FAILURE;
}
ioctl_path = argv[1];
request = strtol(argv[2], NULL, 10);
if (argc > 3) {
arg0 = strtol(argv[3], NULL, 10);
}
if (argc > 4) {
arg1 = strtol(argv[4], NULL, 10);
}
fd = open(ioctl_path, O_RDONLY);
if (fd == -1) {
perror("open");
return EXIT_FAILURE;
}
switch (request)
{
case 0:
arg_int = arg0;
ret = ioctl(fd, LKMC_IOCTL_INC, &arg_int);
if (ret != -1) {
printf("%d\n", arg_int);
}
break;
case 1:
arg_struct.i = arg0;
arg_struct.j = arg1;
ret = ioctl(fd, LKMC_IOCTL_INC_DEC, &arg_struct);
if (ret != -1) {
printf("%d %d\n", arg_struct.i, arg_struct.j);
}
break;
default:
puts("error: unknown request");
return EXIT_FAILURE;
}
if (ret == -1) {
perror("ioctl");
printf("errno = %d\n", errno);
return EXIT_FAILURE;
}
close(fd);
return EXIT_SUCCESS;
}

2
userland/netlink.c → userland/kernel_modules/netlink.c
View File

@@ -7,7 +7,7 @@
#include <sys/socket.h>
#include <unistd.h>
#include "../include/netlink.h"
#include <include/netlink.h>
#define MAX_PAYLOAD 1024

41
userland/kernel_modules/poll.c Normal file
View File

@@ -0,0 +1,41 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#poll */
#define _XOPEN_SOURCE 700
#include <assert.h>
#include <fcntl.h> /* creat, O_CREAT */
#include <poll.h> /* poll */
#include <stdio.h> /* printf, puts, snprintf */
#include <stdlib.h> /* EXIT_FAILURE, EXIT_SUCCESS */
#include <unistd.h> /* read */
int main(int argc, char **argv) {
char buf[1024];
int fd, i, n;
short revents;
struct pollfd pfd;
if (argc < 2) {
fprintf(stderr, "usage: %s <poll-device>\n", argv[0]);
exit(EXIT_FAILURE);
}
fd = open(argv[1], O_RDONLY | O_NONBLOCK);
if (fd == -1) {
perror("open");
exit(EXIT_FAILURE);
}
pfd.fd = fd;
pfd.events = POLLIN;
while (1) {
puts("loop");
i = poll(&pfd, 1, -1);
if (i == -1) {
perror("poll");
assert(0);
}
revents = pfd.revents;
if (revents & POLLIN) {
n = read(pfd.fd, buf, sizeof(buf));
printf("POLLIN n=%d buf=%.*s\n", n, n, buf);
}
}
}

20
userland/uio_read.c → userland/kernel_modules/uio_read.c
View File

@@ -16,8 +16,7 @@
#include <assert.h>
#include <sys/mman.h>
int main(int argc, char **argv)
{
int main(int argc, char **argv) {
char *dev = "/dev/uio0";
if (argc > 1) {
dev = argv[1];
@@ -30,12 +29,14 @@ int main(int argc, char **argv)
}
/* TODO not supported by this kernel module? */
/*int *addr = mmap(NULL, sysconf(_SC_PAGE_SIZE), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);*/
/*if (addr == MAP_FAILED) {*/
/*perror("mmap");*/
/*assert(0);*/
/*}*/
/**addr = 0x12345678;*/
#if 0
int *addr = mmap(NULL, sysconf(_SC_PAGE_SIZE), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (addr == MAP_FAILED) {
perror("mmap");
assert(0);
}
*addr = 0x12345678;
#endif
while (1) {
uint32_t info = 1;
@@ -66,8 +67,7 @@ int main(int argc, char **argv)
#include <unistd.h>
#include <unistd.h>
int main(void)
{
int main(void) {
int uiofd;
int configfd;
int err;

1
userland/libs/eigen/build Symbolic link
View File

@@ -0,0 +1 @@
../build

15
userland/libs/eigen_hello.cpp → userland/libs/eigen/hello.cpp
View File

@@ -1,13 +1,16 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#eigen
* Adapted from: https://eigen.tuxfamily.org/dox/GettingStarted.html
*/
#include <iostream>
#include <Eigen/Dense>
int main() {
Eigen::MatrixXd m(2,2);
m(0,0) = 3;
m(1,0) = 2.5;
m(0,1) = -1;
m(1,1) = m(1,0) + m(0,1);
std::cout << m << std::endl;
Eigen::MatrixXd m(2,2);
m(0,0) = 3;
m(1,0) = 2.5;
m(0,1) = -1;
m(1,1) = m(1,0) + m(0,1);
std::cout << m << std::endl;
}

1
userland/libs/libdrm/build Symbolic link
View File

@@ -0,0 +1 @@
../build

652
userland/libs/libdrm_modeset.c → userland/libs/libdrm/modeset.c
View File

@@ -45,10 +45,10 @@
struct modeset_dev;
static int modeset_find_crtc(int fd, drmModeRes *res, drmModeConnector *conn,
struct modeset_dev *dev);
struct modeset_dev *dev);
static int modeset_create_fb(int fd, struct modeset_dev *dev);
static int modeset_setup_dev(int fd, drmModeRes *res, drmModeConnector *conn,
struct modeset_dev *dev);
struct modeset_dev *dev);
static int modeset_open(int *out, const char *node);
static int modeset_prepare(int fd);
static void modeset_draw(void);
@@ -81,26 +81,26 @@ static void modeset_cleanup(int fd);
static int modeset_open(int *out, const char *node)
{
int fd, ret;
uint64_t has_dumb;
int fd, ret;
uint64_t has_dumb;
fd = open(node, O_RDWR | O_CLOEXEC);
if (fd < 0) {
ret = -errno;
fprintf(stderr, "cannot open '%s': %m\n", node);
return ret;
}
fd = open(node, O_RDWR | O_CLOEXEC);
if (fd < 0) {
ret = -errno;
fprintf(stderr, "cannot open '%s': %s\n", node, strerror(errno));
return ret;
}
if (drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &has_dumb) < 0 ||
!has_dumb) {
fprintf(stderr, "drm device '%s' does not support dumb buffers\n",
node);
close(fd);
return -EOPNOTSUPP;
}
if (drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &has_dumb) < 0 ||
!has_dumb) {
fprintf(stderr, "drm device '%s' does not support dumb buffers\n",
node);
close(fd);
return -EOPNOTSUPP;
}
*out = fd;
return 0;
*out = fd;
return 0;
}
/*
@@ -149,20 +149,20 @@ static int modeset_open(int *out, const char *node)
*/
struct modeset_dev {
struct modeset_dev *next;
struct modeset_dev *next;
uint32_t width;
uint32_t height;
uint32_t stride;
uint32_t size;
uint32_t handle;
uint8_t *map;
uint32_t width;
uint32_t height;
uint32_t stride;
uint32_t size;
uint32_t handle;
uint8_t *map;
drmModeModeInfo mode;
uint32_t fb;
uint32_t conn;
uint32_t crtc;
drmModeCrtc *saved_crtc;
drmModeModeInfo mode;
uint32_t fb;
uint32_t conn;
uint32_t crtc;
drmModeCrtc *saved_crtc;
};
static struct modeset_dev *modeset_list = NULL;
@@ -188,57 +188,57 @@ static struct modeset_dev *modeset_list = NULL;
static int modeset_prepare(int fd)
{
drmModeRes *res;
drmModeConnector *conn;
unsigned int i;
struct modeset_dev *dev;
int ret;
drmModeRes *res;
drmModeConnector *conn;
unsigned int i;
struct modeset_dev *dev;
int ret;
/* retrieve resources */
res = drmModeGetResources(fd);
if (!res) {
fprintf(stderr, "cannot retrieve DRM resources (%d): %m\n",
errno);
return -errno;
}
/* retrieve resources */
res = drmModeGetResources(fd);
if (!res) {
fprintf(stderr, "cannot retrieve DRM resources (%d): %s\n",
errno, strerror(errno));
return -errno;
}
/* iterate all connectors */
for (i = 0; i < (unsigned int)res->count_connectors; ++i) {
/* get information for each connector */
conn = drmModeGetConnector(fd, res->connectors[i]);
if (!conn) {
fprintf(stderr, "cannot retrieve DRM connector %u:%u (%d): %m\n",
i, res->connectors[i], errno);
continue;
}
/* iterate all connectors */
for (i = 0; i < (unsigned int)res->count_connectors; ++i) {
/* get information for each connector */
conn = drmModeGetConnector(fd, res->connectors[i]);
if (!conn) {
fprintf(stderr, "cannot retrieve DRM connector %u:%u (%d): %s\n",
i, res->connectors[i], errno, strerror(errno));
continue;
}
/* create a device structure */
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->conn = conn->connector_id;
/* create a device structure */
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->conn = conn->connector_id;
/* call helper function to prepare this connector */
ret = modeset_setup_dev(fd, res, conn, dev);
if (ret) {
if (ret != -ENOENT) {
errno = -ret;
fprintf(stderr, "cannot setup device for connector %u:%u (%d): %m\n",
i, res->connectors[i], errno);
}
free(dev);
drmModeFreeConnector(conn);
continue;
}
/* call helper function to prepare this connector */
ret = modeset_setup_dev(fd, res, conn, dev);
if (ret) {
if (ret != -ENOENT) {
errno = -ret;
fprintf(stderr, "cannot setup device for connector %u:%u (%d): %s\n",
i, res->connectors[i], errno, strerror(errno));
}
free(dev);
drmModeFreeConnector(conn);
continue;
}
/* free connector data and link device into global list */
drmModeFreeConnector(conn);
dev->next = modeset_list;
modeset_list = dev;
}
/* free connector data and link device into global list */
drmModeFreeConnector(conn);
dev->next = modeset_list;
modeset_list = dev;
}
/* free resources again */
drmModeFreeResources(res);
return 0;
/* free resources again */
drmModeFreeResources(res);
return 0;
}
/*
@@ -271,48 +271,48 @@ static int modeset_prepare(int fd)
*/
static int modeset_setup_dev(int fd, drmModeRes *res, drmModeConnector *conn,
struct modeset_dev *dev)
struct modeset_dev *dev)
{
int ret;
int ret;
/* check if a monitor is connected */
if (conn->connection != DRM_MODE_CONNECTED) {
fprintf(stderr, "ignoring unused connector %u\n",
conn->connector_id);
return -ENOENT;
}
/* check if a monitor is connected */
if (conn->connection != DRM_MODE_CONNECTED) {
fprintf(stderr, "ignoring unused connector %u\n",
conn->connector_id);
return -ENOENT;
}
/* check if there is at least one valid mode */
if (conn->count_modes == 0) {
fprintf(stderr, "no valid mode for connector %u\n",
conn->connector_id);
return -EFAULT;
}
/* check if there is at least one valid mode */
if (conn->count_modes == 0) {
fprintf(stderr, "no valid mode for connector %u\n",
conn->connector_id);
return -EFAULT;
}
/* copy the mode information into our device structure */
memcpy(&dev->mode, &conn->modes[0], sizeof(dev->mode));
dev->width = conn->modes[0].hdisplay;
dev->height = conn->modes[0].vdisplay;
fprintf(stderr, "mode for connector %u is %ux%u\n",
conn->connector_id, dev->width, dev->height);
/* copy the mode information into our device structure */
memcpy(&dev->mode, &conn->modes[0], sizeof(dev->mode));
dev->width = conn->modes[0].hdisplay;
dev->height = conn->modes[0].vdisplay;
fprintf(stderr, "mode for connector %u is %ux%u\n",
conn->connector_id, dev->width, dev->height);
/* find a crtc for this connector */
ret = modeset_find_crtc(fd, res, conn, dev);
if (ret) {
fprintf(stderr, "no valid crtc for connector %u\n",
conn->connector_id);
return ret;
}
/* find a crtc for this connector */
ret = modeset_find_crtc(fd, res, conn, dev);
if (ret) {
fprintf(stderr, "no valid crtc for connector %u\n",
conn->connector_id);
return ret;
}
/* create a framebuffer for this CRTC */
ret = modeset_create_fb(fd, dev);
if (ret) {
fprintf(stderr, "cannot create framebuffer for connector %u\n",
conn->connector_id);
return ret;
}
/* create a framebuffer for this CRTC */
ret = modeset_create_fb(fd, dev);
if (ret) {
fprintf(stderr, "cannot create framebuffer for connector %u\n",
conn->connector_id);
return ret;
}
return 0;
return 0;
}
/*
@@ -338,80 +338,80 @@ static int modeset_setup_dev(int fd, drmModeRes *res, drmModeConnector *conn,
*/
static int modeset_find_crtc(int fd, drmModeRes *res, drmModeConnector *conn,
struct modeset_dev *dev)
struct modeset_dev *dev)
{
drmModeEncoder *enc;
unsigned int i, j;
int32_t crtc;
struct modeset_dev *iter;
drmModeEncoder *enc;
unsigned int i, j;
int32_t crtc;
struct modeset_dev *iter;
/* first try the currently conected encoder+crtc */
if (conn->encoder_id)
enc = drmModeGetEncoder(fd, conn->encoder_id);
else
enc = NULL;
/* first try the currently conected encoder+crtc */
if (conn->encoder_id)
enc = drmModeGetEncoder(fd, conn->encoder_id);
else
enc = NULL;
if (enc) {
if (enc->crtc_id) {
crtc = enc->crtc_id;
for (iter = modeset_list; iter; iter = iter->next) {
if ((int32_t)iter->crtc == crtc) {
crtc = -1;
break;
}
}
if (enc) {
if (enc->crtc_id) {
crtc = enc->crtc_id;
for (iter = modeset_list; iter; iter = iter->next) {
if ((int32_t)iter->crtc == crtc) {
crtc = -1;
break;
}
}
if (crtc >= 0) {
drmModeFreeEncoder(enc);
dev->crtc = crtc;
return 0;
}
}
if (crtc >= 0) {
drmModeFreeEncoder(enc);
dev->crtc = crtc;
return 0;
}
}
drmModeFreeEncoder(enc);
}
drmModeFreeEncoder(enc);
}
/* If the connector is not currently bound to an encoder or if the
* encoder+crtc is already used by another connector (actually unlikely
* but lets be safe), iterate all other available encoders to find a
* matching CRTC. */
for (i = 0; i < (unsigned int)conn->count_encoders; ++i) {
enc = drmModeGetEncoder(fd, conn->encoders[i]);
if (!enc) {
fprintf(stderr, "cannot retrieve encoder %u:%u (%d): %m\n",
i, conn->encoders[i], errno);
continue;
}
/* If the connector is not currently bound to an encoder or if the
* encoder+crtc is already used by another connector (actually unlikely
* but lets be safe), iterate all other available encoders to find a
* matching CRTC. */
for (i = 0; i < (unsigned int)conn->count_encoders; ++i) {
enc = drmModeGetEncoder(fd, conn->encoders[i]);
if (!enc) {
fprintf(stderr, "cannot retrieve encoder %u:%u (%d): %s\n",
i, conn->encoders[i], errno, strerror(errno));
continue;
}
/* iterate all global CRTCs */
for (j = 0; j < (unsigned int)res->count_crtcs; ++j) {
/* check whether this CRTC works with the encoder */
if (!(enc->possible_crtcs & (1 << j)))
continue;
/* iterate all global CRTCs */
for (j = 0; j < (unsigned int)res->count_crtcs; ++j) {
/* check whether this CRTC works with the encoder */
if (!(enc->possible_crtcs & (1 << j)))
continue;
/* check that no other device already uses this CRTC */
crtc = res->crtcs[j];
for (iter = modeset_list; iter; iter = iter->next) {
if ((int32_t)iter->crtc == crtc) {
crtc = -1;
break;
}
}
/* check that no other device already uses this CRTC */
crtc = res->crtcs[j];
for (iter = modeset_list; iter; iter = iter->next) {
if ((int32_t)iter->crtc == crtc) {
crtc = -1;
break;
}
}
/* we have found a CRTC, so save it and return */
if (crtc >= 0) {
drmModeFreeEncoder(enc);
dev->crtc = crtc;
return 0;
}
}
/* we have found a CRTC, so save it and return */
if (crtc >= 0) {
drmModeFreeEncoder(enc);
dev->crtc = crtc;
return 0;
}
}
drmModeFreeEncoder(enc);
}
drmModeFreeEncoder(enc);
}
fprintf(stderr, "cannot find suitable CRTC for connector %u\n",
conn->connector_id);
return -ENOENT;
fprintf(stderr, "cannot find suitable CRTC for connector %u\n",
conn->connector_id);
return -ENOENT;
}
/*
@@ -441,69 +441,69 @@ static int modeset_find_crtc(int fd, drmModeRes *res, drmModeConnector *conn,
static int modeset_create_fb(int fd, struct modeset_dev *dev)
{
struct drm_mode_create_dumb creq;
struct drm_mode_destroy_dumb dreq;
struct drm_mode_map_dumb mreq;
int ret;
struct drm_mode_create_dumb creq;
struct drm_mode_destroy_dumb dreq;
struct drm_mode_map_dumb mreq;
int ret;
/* create dumb buffer */
memset(&creq, 0, sizeof(creq));
creq.width = dev->width;
creq.height = dev->height;
creq.bpp = 32;
ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq);
if (ret < 0) {
fprintf(stderr, "cannot create dumb buffer (%d): %m\n",
errno);
return -errno;
}
dev->stride = creq.pitch;
dev->size = creq.size;
dev->handle = creq.handle;
/* create dumb buffer */
memset(&creq, 0, sizeof(creq));
creq.width = dev->width;
creq.height = dev->height;
creq.bpp = 32;
ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq);
if (ret < 0) {
fprintf(stderr, "cannot create dumb buffer (%d): %s\n",
errno, strerror(errno));
return -errno;
}
dev->stride = creq.pitch;
dev->size = creq.size;
dev->handle = creq.handle;
/* create framebuffer object for the dumb-buffer */
ret = drmModeAddFB(fd, dev->width, dev->height, 24, 32, dev->stride,
dev->handle, &dev->fb);
if (ret) {
fprintf(stderr, "cannot create framebuffer (%d): %m\n",
errno);
ret = -errno;
goto err_destroy;
}
/* create framebuffer object for the dumb-buffer */
ret = drmModeAddFB(fd, dev->width, dev->height, 24, 32, dev->stride,
dev->handle, &dev->fb);
if (ret) {
fprintf(stderr, "cannot create framebuffer (%d): %s\n",
errno, strerror(errno));
ret = -errno;
goto err_destroy;
}
/* prepare buffer for memory mapping */
memset(&mreq, 0, sizeof(mreq));
mreq.handle = dev->handle;
ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq);
if (ret) {
fprintf(stderr, "cannot map dumb buffer (%d): %m\n",
errno);
ret = -errno;
goto err_fb;
}
/* prepare buffer for memory mapping */
memset(&mreq, 0, sizeof(mreq));
mreq.handle = dev->handle;
ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mreq);
if (ret) {
fprintf(stderr, "cannot map dumb buffer (%d): %s\n",
errno, strerror(errno));
ret = -errno;
goto err_fb;
}
/* perform actual memory mapping */
dev->map = mmap(0, dev->size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, mreq.offset);
if (dev->map == MAP_FAILED) {
fprintf(stderr, "cannot mmap dumb buffer (%d): %m\n",
errno);
ret = -errno;
goto err_fb;
}
/* perform actual memory mapping */
dev->map = mmap(0, dev->size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, mreq.offset);
if (dev->map == MAP_FAILED) {
fprintf(stderr, "cannot mmap dumb buffer (%d): %s\n",
errno, strerror(errno));
ret = -errno;
goto err_fb;
}
/* clear the framebuffer to 0 */
memset(dev->map, 0, dev->size);
/* clear the framebuffer to 0 */
memset(dev->map, 0, dev->size);
return 0;
return 0;
err_fb:
drmModeRmFB(fd, dev->fb);
drmModeRmFB(fd, dev->fb);
err_destroy:
memset(&dreq, 0, sizeof(dreq));
dreq.handle = dev->handle;
drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
return ret;
memset(&dreq, 0, sizeof(dreq));
dreq.handle = dev->handle;
drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
return ret;
}
/*
@@ -543,56 +543,56 @@ err_destroy:
int main(int argc, char **argv)
{
int ret, fd;
const char *card;
struct modeset_dev *iter;
int ret, fd;
const char *card;
struct modeset_dev *iter;
/* check which DRM device to open */
if (argc > 1)
card = argv[1];
else
card = "/dev/dri/card0";
/* check which DRM device to open */
if (argc > 1)
card = argv[1];
else
card = "/dev/dri/card0";
fprintf(stderr, "using card '%s'\n", card);
fprintf(stderr, "using card '%s'\n", card);
/* open the DRM device */
ret = modeset_open(&fd, card);
if (ret)
goto out_return;
/* open the DRM device */
ret = modeset_open(&fd, card);
if (ret)
goto out_return;
/* prepare all connectors and CRTCs */
ret = modeset_prepare(fd);
if (ret)
goto out_close;
/* prepare all connectors and CRTCs */
ret = modeset_prepare(fd);
if (ret)
goto out_close;
/* perform actual modesetting on each found connector+CRTC */
for (iter = modeset_list; iter; iter = iter->next) {
iter->saved_crtc = drmModeGetCrtc(fd, iter->crtc);
ret = drmModeSetCrtc(fd, iter->crtc, iter->fb, 0, 0,
&iter->conn, 1, &iter->mode);
if (ret)
fprintf(stderr, "cannot set CRTC for connector %u (%d): %m\n",
iter->conn, errno);
}
/* perform actual modesetting on each found connector+CRTC */
for (iter = modeset_list; iter; iter = iter->next) {
iter->saved_crtc = drmModeGetCrtc(fd, iter->crtc);
ret = drmModeSetCrtc(fd, iter->crtc, iter->fb, 0, 0,
&iter->conn, 1, &iter->mode);
if (ret)
fprintf(stderr, "cannot set CRTC for connector %u (%d): %s\n",
iter->conn, errno, strerror(errno));
}
/* draw some colors for 5seconds */
modeset_draw();
/* draw some colors for 5seconds */
modeset_draw();
/* cleanup everything */
modeset_cleanup(fd);
/* cleanup everything */
modeset_cleanup(fd);
ret = 0;
ret = 0;
out_close:
close(fd);
close(fd);
out_return:
if (ret) {
errno = -ret;
fprintf(stderr, "modeset failed with error %d: %m\n", errno);
} else {
fprintf(stderr, "exiting\n");
}
return ret;
if (ret) {
errno = -ret;
fprintf(stderr, "modeset failed with error %d: %s\n", errno, strerror(errno));
} else {
fprintf(stderr, "exiting\n");
}
return ret;
}
/*
@@ -602,15 +602,15 @@ out_return:
static uint8_t next_color(bool *up, uint8_t cur, unsigned int mod)
{
uint8_t next;
uint8_t next;
next = cur + (*up ? 1 : -1) * (rand() % mod);
if ((*up && next < cur) || (!*up && next > cur)) {
*up = !*up;
next = cur;
}
next = cur + (*up ? 1 : -1) * (rand() % mod);
if ((*up && next < cur) || (!*up && next > cur)) {
*up = !*up;
next = cur;
}
return next;
return next;
}
/*
@@ -635,34 +635,34 @@ static uint8_t next_color(bool *up, uint8_t cur, unsigned int mod)
static void modeset_draw(void)
{
uint8_t r, g, b;
bool r_up, g_up, b_up;
unsigned int i, j, k, off;
struct modeset_dev *iter;
uint8_t r, g, b;
bool r_up, g_up, b_up;
unsigned int i, j, k, off;
struct modeset_dev *iter;
srand(time(NULL));
r = rand() % 0xff;
g = rand() % 0xff;
b = rand() % 0xff;
r_up = g_up = b_up = true;
srand(time(NULL));
r = rand() % 0xff;
g = rand() % 0xff;
b = rand() % 0xff;
r_up = g_up = b_up = true;
for (i = 0; i < 50; ++i) {
r = next_color(&r_up, r, 20);
g = next_color(&g_up, g, 10);
b = next_color(&b_up, b, 5);
for (i = 0; i < 50; ++i) {
r = next_color(&r_up, r, 20);
g = next_color(&g_up, g, 10);
b = next_color(&b_up, b, 5);
for (iter = modeset_list; iter; iter = iter->next) {
for (j = 0; j < iter->height; ++j) {
for (k = 0; k < iter->width; ++k) {
off = iter->stride * j + k * 4;
*(uint32_t*)&iter->map[off] =
(r << 16) | (g << 8) | b;
}
}
}
for (iter = modeset_list; iter; iter = iter->next) {
for (j = 0; j < iter->height; ++j) {
for (k = 0; k < iter->width; ++k) {
off = iter->stride * j + k * 4;
*(uint32_t*)&iter->map[off] =
(r << 16) | (g << 8) | b;
}
}
}
usleep(100000);
}
usleep(100000);
}
}
/*
@@ -674,39 +674,41 @@ static void modeset_draw(void)
static void modeset_cleanup(int fd)
{
struct modeset_dev *iter;
struct drm_mode_destroy_dumb dreq;
struct modeset_dev *iter;
struct drm_mode_destroy_dumb dreq;
while (modeset_list) {
/* remove from global list */
iter = modeset_list;
modeset_list = iter->next;
while (modeset_list) {
/* remove from global list */
iter = modeset_list;
modeset_list = iter->next;
/* restore saved CRTC configuration */
drmModeSetCrtc(fd,
iter->saved_crtc->crtc_id,
iter->saved_crtc->buffer_id,
iter->saved_crtc->x,
iter->saved_crtc->y,
&iter->conn,
1,
&iter->saved_crtc->mode);
drmModeFreeCrtc(iter->saved_crtc);
/* restore saved CRTC configuration */
drmModeSetCrtc(
fd,
iter->saved_crtc->crtc_id,
iter->saved_crtc->buffer_id,
iter->saved_crtc->x,
iter->saved_crtc->y,
&iter->conn,
1,
&iter->saved_crtc->mode
);
drmModeFreeCrtc(iter->saved_crtc);
/* unmap buffer */
munmap(iter->map, iter->size);
/* unmap buffer */
munmap(iter->map, iter->size);
/* delete framebuffer */
drmModeRmFB(fd, iter->fb);
/* delete framebuffer */
drmModeRmFB(fd, iter->fb);
/* delete dumb buffer */
memset(&dreq, 0, sizeof(dreq));
dreq.handle = iter->handle;
drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
/* delete dumb buffer */
memset(&dreq, 0, sizeof(dreq));
dreq.handle = iter->handle;
drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &dreq);
/* free allocated memory */
free(iter);
}
/* free allocated memory */
free(iter);
}
}
/*

1
userland/libs/openblas/build Symbolic link
View File

@@ -0,0 +1 @@
../build

0
userland/libs/openblas_hello.c → userland/libs/openblas/hello.c
View File

4
userland/linux/README.adoc
View File

@@ -1,3 +1,5 @@
Programs in this directory rely on Linux kernel specific functionality such as `/proc`.
Programs in this directory rely on Linux kernel specific functionality such as `/proc` or raw system calls.
These programs may also conform to ANSI C or POSIX, but we put them here because you can only observe them at work under Linux.
Many of these programs use glibc or GCC extensions.

25
userland/linux/init_env_poweroff.c Normal file
View File

@@ -0,0 +1,25 @@
#define _XOPEN_SOURCE 700
#include <stdio.h>
#include <sys/reboot.h>
#include <unistd.h>
int main(int argc, char **argv) {
int i;
puts("args:");
for (i = 0; i < argc; ++i)
puts(argv[i]);
puts("");
puts("env:");
extern char **environ;
char **env = environ;
while (*env) {
printf("%s\n", *env);
env++;
}
puts("");
/* Poweroff. */
reboot(RB_POWER_OFF);
}

0
userland/myinsmod.c → userland/linux/myinsmod.c
View File

0
userland/myrmmod.c → userland/linux/myrmmod.c
View File

2
userland/linux/poweroff.c
View File

@@ -5,5 +5,5 @@
#include <unistd.h>
int main(void) {
reboot(RB_POWER_OFF);
reboot(RB_POWER_OFF);
}

0
userland/proc_events.c → userland/linux/proc_events.c
View File

42
userland/linux/rand_check.c
View File

@@ -13,29 +13,29 @@ int bss = 0;
int data = 1;
int main(__attribute__((unused)) int argc, char **argv) {
int i, *ip;
uint64_t uint64;
FILE *fp;
int i, *ip;
uint64_t uint64;
FILE *fp;
/* Loaded addresses. */
printf("&i = %p\n", (void *)&i);
printf("&argv[0] = %p\n", (void *)&argv[0]);
printf("&main = %p\n", (void *)(intptr_t)main);
printf("&bss = %p\n", (void *)&bss);
printf("&data = %p\n", (void *)&data);
/* Loaded addresses. */
printf("&i = %p\n", (void *)&i);
printf("&argv[0] = %p\n", (void *)&argv[0]);
printf("&main = %p\n", (void *)(intptr_t)main);
printf("&bss = %p\n", (void *)&bss);
printf("&data = %p\n", (void *)&data);
/* Misc syscalls. */
printf("time(NULL) = %ju\n", (uintmax_t)time(NULL));
printf("pid = %ju\n", (uintmax_t)getpid());
/* Misc syscalls. */
printf("time(NULL) = %ju\n", (uintmax_t)time(NULL));
printf("pid = %ju\n", (uintmax_t)getpid());
/* malloc */
ip = malloc(sizeof(*ip));
printf("&malloc = %p\n", (void *)ip);
free(ip);
/* malloc */
ip = malloc(sizeof(*ip));
printf("&malloc = %p\n", (void *)ip);
free(ip);
/* /dev/urandom */
fp = fopen("/dev/urandom", "rb");
fread(&uint64, sizeof(uint64), 1, fp);
printf("/dev/urandom = %" PRIx64 "\n", uint64);
fclose(fp);
/* /dev/urandom */
fp = fopen("/dev/urandom", "rb");
fread(&uint64, sizeof(uint64), 1, fp);
printf("/dev/urandom = %" PRIx64 "\n", uint64);
fclose(fp);
}

0
userland/sched_getaffinity.c → userland/linux/sched_getaffinity.c
View File

20
userland/sched_getaffinity_threads.c → userland/linux/sched_getaffinity_threads.c
View File

@@ -10,31 +10,31 @@
#include <unistd.h>
void* main_thread_0(void *arg) {
int i;
int i;
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET(*((int*)arg), &mask);
sched_setaffinity(0, sizeof(cpu_set_t), &mask);
i = 0;
while (true) {
printf("0 %d\n", i);
sleep(1);
i++;
printf("0 %d\n", i);
sleep(1);
i++;
}
return NULL;
}
void* main_thread_1(void *arg) {
int i;
int i;
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET(*((int*)arg), &mask);
sched_setaffinity(1, sizeof(cpu_set_t), &mask);
i = 0;
while (true) {
printf("1 %d\n", i);
sleep(1);
i++;
printf("1 %d\n", i);
sleep(1);
i++;
}
return NULL;
}
@@ -43,8 +43,8 @@ int main(void) {
enum NUM_THREADS {NUM_THREADS = 2};
pthread_t threads[NUM_THREADS];
int thread_args[NUM_THREADS];
pthread_create(&threads[0], NULL, main_thread_0, (void*)&thread_args[0]);
pthread_create(&threads[1], NULL, main_thread_1, (void*)&thread_args[1]);
pthread_create(&threads[0], NULL, main_thread_0, (void*)&thread_args[0]);
pthread_create(&threads[1], NULL, main_thread_1, (void*)&thread_args[1]);
pthread_join(threads[0], NULL);
pthread_join(threads[1], NULL);
return EXIT_SUCCESS;

41
userland/poll.c
View File

@@ -1,41 +0,0 @@
/* https://github.com/cirosantilli/linux-kernel-module-cheat#poll */
#define _XOPEN_SOURCE 700
#include <assert.h>
#include <fcntl.h> /* creat, O_CREAT */
#include <poll.h> /* poll */
#include <stdio.h> /* printf, puts, snprintf */
#include <stdlib.h> /* EXIT_FAILURE, EXIT_SUCCESS */
#include <unistd.h> /* read */
int main(int argc, char **argv) {
char buf[1024];
int fd, i, n;
short revents;
struct pollfd pfd;
if (argc < 2) {
fprintf(stderr, "usage: %s <poll-device>\n", argv[0]);
exit(EXIT_FAILURE);
}
fd = open(argv[1], O_RDONLY | O_NONBLOCK);
if (fd == -1) {
perror("open");
exit(EXIT_FAILURE);
}
pfd.fd = fd;
pfd.events = POLLIN;
while (1) {
puts("loop");
i = poll(&pfd, 1, -1);
if (i == -1) {
perror("poll");
assert(0);
}
revents = pfd.revents;
if (revents & POLLIN) {
n = read(pfd.fd, buf, sizeof(buf));
printf("POLLIN n=%d buf=%.*s\n", n, n, buf);
}
}
}

14
userland/virt_to_phys_test.c → userland/posix/virt_to_phys_test.c
View File

@@ -11,11 +11,11 @@ enum { I0 = 0x12345678 };
static volatile uint32_t i = I0;
int main(void) {
printf("vaddr %p\n", (void *)&i);
printf("pid %ju\n", (uintmax_t)getpid());
while (i == I0) {
sleep(1);
}
printf("i %jx\n", (uintmax_t)i);
return EXIT_SUCCESS;
printf("vaddr %p\n", (void *)&i);
printf("pid %ju\n", (uintmax_t)getpid());
while (i == I0) {
sleep(1);
}
printf("i %jx\n", (uintmax_t)i);
return EXIT_SUCCESS;
}

10
userland/print_argv.c
View File

@@ -1,10 +0,0 @@
/* Print each command line argument received, one per line. */
#include <stdio.h>
int main(int argc, char **argv) {
size_t i;
for (i = 0; i < (size_t)argc; ++i)
printf("%s\n", argv[i]);
return 0;
}