bak

Author: cirosantilli

README.bigb

@@ -144,7 +144,7 @@ I am also generally interested in:
 | Illus.  Terese Nelsen               |
  -------------------------------------
 ``
-{title=<ASCII art> of https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=413591[Force of Will] <Magic: The Gathering> card <inscribed (blockchain)> in the <Bitcoin blockchain>}
+{title=<ASCII art> of a https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=413591[Force of Will] <Magic: The Gathering> card <inscribed (blockchain)> in the <Bitcoin blockchain>}
 {description=Artist unknown, uploaded December 2014. Part of <Cool data embedded in the Bitcoin blockchain>{full} where <Ciro Santilli> maintains a curated list of such interesting inscriptions.
 
 This was a small project done by Ciro for <artistic> purposes that received some attention due to the incredible hype surrounding <cryptocurrencies> at the time. <Ciro Santilli>'s views on  <cryptocurrencies> are summarized at: <Are cryptocurrencies useful?>{full}.

aratu-week-2024-talk-by-ciro-santilli.bigb

@@ -1,6 +1,9 @@
 = Aratu Week 2024 Talk by Ciro Santilli: My Best Random Projects
 {scope}
 
+* https://cirosantilli.com/aratu-week-2024-talk-by-ciro-santilli
+* https://ourbigbook.com/cirosantilli/aratu-week-2024-talk-by-ciro-santilli
+
 \Image[https://raw.githubusercontent.com/cirosantilli/media/master/CIA_Star_Wars_website_promo.jpg]
 {height=850}
 {source=https://web.archive.org/web/20101230033220/http://starwarsweb.net/}
@@ -450,6 +453,40 @@ Article: <Ciro's Bitcoin Inscription Museum>{full}
 = My obsession: find \b[every] image before ordinals
 {parent=Ciro's Bitcoin Inscription Museum}
 
+= Fan tributes
+{parent=My obsession: find every image before ordinals}
+
+``
+ -------------------------------------
+|  Force of Will               3 U U  |
+|  ---------------------------------  |
+| |                  ////////////   | |
+| |                ////() ()\////\  | |
+| |               ///_\ (--) \///\  | |
+| |        )      ////  \_____///\\ | |
+| |       ) \      /   /   /    /   | |
+| |    ) /   \     |   |  /   _/    | |
+| |   ) \  (  (   /   / /   / \     | |
+| |  / ) ( )  / (    )/(    )  \    | |
+| |  \(_)/(_)/  /UUUU \  \\\/   |   | |
+| .---------------------------------. |
+| Interrupt                           |
+| ,---------------------------------, |
+| | You may pay 1 life and remove a | |
+| | blue card in your hand from the | |
+| | game instead of paying Force of | |
+| | Will's casting cost.  Effects   | |
+| | that prevent or redirect damage | |
+| | cannot be used to counter this  | |
+| | loss of life.                   | |
+| | Counter target spell.           | |
+| `---------------------------------` |
+|                                     l
+| Illus.  Terese Nelsen               |
+ -------------------------------------
+``
+{title=<ASCII art> of a https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=413591[Force of Will] <Magic: The Gathering> card <inscribed (blockchain)> in the <Bitcoin blockchain>}
+
 = Social media
 {parent=My obsession: find every image before ordinals}
 
@@ -604,7 +641,7 @@ Removing the `@` signs:
 \Image[https://raw.githubusercontent.com/cirosantilli/china-dictatorship-media/master/GitHub_collateral_freedom.jpg]
 {height=800}
 
-= The issue tracker is quite cute, because Chinese people actually use GitHub search in addition to search engines
+= The GitHub issue tracker is quite cute, because Chinese people actually use GitHub search in addition to search engines
 {parent=China dictatorship}
 
 https://github.com/cirosantilli/china-dictatorship/issues
@@ -613,17 +650,276 @@ https://github.com/cirosantilli/china-dictatorship/issues
 {height=2000}
 {source=https://github.com/cirosantilli/china-dictatorship/issues}
 
+= Stack Overflow attacks
+{parent=China dictatorship}
+
+\Image[https://upload.wikimedia.org/wikipedia/commons/0/02/Stack_Overflow_logo.svg]
+{height=200}
+
+https://web.archive.org/web/20210917212322/https://stackoverflow.com/questions/6121094/how-do-i-run-a-program-with-commandline-arguments-using-gdb-within-a-bash-script/6121299
+
+\Image[https://raw.githubusercontent.com/cirosantilli/china-dictatorship-media/master/Stack_Overflow_keyword_attack_by_Ciro_Santilli.png]
+{height=1660}
+
+= Package managers
+{parent=China dictatorship}
+
+= PyPi: the cowards took it down
+{parent=Package managers}
+
+Up March 2023 https://web.archive.org/web/20230306090740/https://pypi.org/project/china-dictatorship/ 
+
+\Image[https://raw.githubusercontent.com/cirosantilli/china-dictatorship-media/master/pypi.org_project_china-dictatorship.png]
+{height=1900}
+
+Down November 2023 http://web.archive.org/web/20231110041847/https://pypi.org/project/china-dictatorship/ 
+
+\Image[https://raw.githubusercontent.com/cirosantilli/china-dictatorship-media/master/pypi.org_project_china-dictatorship_down.png]
+{height=916}
+
+= Wall of pride and shame
+{parent=China dictatorship}
+
+|| Site
+|| Logo
+|| Pride or shame
+|| Sample
+|| Comments
+
+| GitHub
+| \Image[https://upload.wikimedia.org/wikipedia/commons/c/c2/GitHub_Invertocat_Logo.svg]{height=300}
+| \Image[https://web.archive.org/web/20230609155744im_/https://preview.redd.it/15l6tpf1dqd31.jpg?width=836&auto=webp&v=enabled&s=2b2f3b9f0ae40826858e0f3908f621ff86d62520]{height=300}
+| https://github.com/cirosantilli/china-dictatorship
+| Exemplary. Never let me down. Has a public per-country takedown list: https://github.com/github/gov-takedowns/tree/master/China
+
+| Stack Overflow
+| \Image[https://upload.wikimedia.org/wikipedia/commons/e/ef/Stack_Overflow_icon.svg]{height=300}
+| \Image[https://web.archive.org/web/20230609155744im_/https://preview.redd.it/15l6tpf1dqd31.jpg?width=836&auto=webp&v=enabled&s=2b2f3b9f0ae40826858e0f3908f621ff86d62520]{height=300}
+| https://stackoverflow.com/users/895245/ciro-santilli-ourbigbook-com
+| Elected mods refuse to say what is allowed or not, you have to fight and infer from meta threads: https://meta.stackexchange.com/questions/366163/can-i-use-images-such-as-from-tiananmen-square-protests-to-criticise-the-chinese[]. But generally shaming anything the West does not like is OK.
+
 = Linux Kernel Module Cheat
 {parent=Aratu Week 2024 Talk by Ciro Santilli}
 
 https://github.com/cirosantilli/linux-kernel-module-cheat
 
-= Run \b[one] command, get a Linux terminal on QEMU
+= Get a Linux terminal on QEMU
 {parent=Linux Kernel Module Cheat}
 
-= \b[Everything] is built from source and easily modifiable
+\Image[https://upload.wikimedia.org/wikipedia/commons/4/45/Qemu_logo.svg]
+
+One time setup:
+``
+git clone https://github.com/cirosantilli/linux-kernel-module-cheat
+cd linux-kernel-module-cheat
+sudo apt install docker
+python3 -m venv .venv
+. .venv/bin/activate
+./setup
+./run-docker create
+./run-docker sh
+``
+
+You are now in Docker.
+
+Build everything from source inside docker:
+``
+./build --download-dependencies qemu-buildroot
+``
+
+Boot Linux and get a userland shell:
+``
+./run
+``
+
+Outcome:
+``
+<6>[    1.383114] NET: Registered protocol family 17
+<6>[    1.383682] 9pnet: Installing 9P2000 support
+<6>[    1.385473] IPI shorthand broadcast: enabled
+<6>[    1.385701] sched_clock: Marking stable (1355697980, 27047205)->(1385555667, -2810482)
+<6>[    1.387744] ALSA device list:
+<6>[    1.387843]   No soundcards found.
+<6>[    1.535981] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
+<5>[    1.543470] scsi 1:0:0:0: CD-ROM            QEMU     QEMU DVD-ROM     2.5+ PQ: 0 ANSI: 5
+<6>[    1.548952] EXT4-fs (vda): mounting ext2 file system using the ext4 subsystem
+<6>[    1.555909] EXT4-fs (vda): mounted filesystem without journal. Opts: (null)
+<6>[    1.556145] VFS: Mounted root (ext2 filesystem) on device 254:0.
+<6>[    1.557451] devtmpfs: mounted
+<6>[    1.605639] Freeing unused kernel image (initmem) memory: 1248K
+<6>[    1.605875] Write protecting the kernel read-only data: 16384k
+<6>[    1.607977] Freeing unused kernel image (text/rodata gap) memory: 2044K
+<6>[    1.610190] Freeing unused kernel image (rodata/data gap) memory: 1012K
+<6>[    1.610495] Run /sbin/init as init process
+<6>[    1.683311] tsc: Refined TSC clocksource calibration: 3293.671 MHz
+<6>[    1.683618] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2f79f177aae, max_idle_ns: 440795226653 ns
+<6>[    1.683849] clocksource: Switched to clocksource tsc
+<3>[    1.694241] 9pnet_virtio: no channels available for device host_data
+mount: mounting host_data on /mnt/9p/data failed: No such file or directory
+qemu-system-x86_64: warning: 9p: degraded performance: a reasonable high msize should be chosen on client/guest side (chosen msize is <= 8192). See https://wiki.qemu.org/Documentation/9pset.
+<3>[    1.712287] overlayfs: overlapping upperdir path
+mount: mounting overlay on /mnt/overlay failed: Too many levels of symbolic links
+hello S98
+hello .profile
+/lkmc
+root@buildroot# pwd
+/lkmc
+/lkmc
+root@buildroot#
+``
+
+= \b[Everything] is built from source and easily modifiable, powered by Buildroot
 {parent=Linux Kernel Module Cheat}
 
+\Image[https://web.archive.org/web/20240424065053im_/https://bootlin.com/wp-content/uploads/2015/05/logo-buildroot.png]
+
+The following are https://github.com/cirosantilli/linux-kernel-module-cheat/blob/master/submodules[stored in submodules]:
+``
+submodules/binutils-gdb/
+submodules/buildroot/
+submodules/gcc/
+submodules/glibc/
+submodules/linux/
+submodules/qemu/
+``
+
+So you can modify source, rebuild and that's it, its in the VM.
+
+E.g., let's hack the linux kernel:
+
+``
+asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
+{
+  pr_info("I'VE HACKED THE LINUX KERNEL!!!");
+``
+
+Rebuild Linux:
+
+``
+./build-linux
+``
+
+Rerun:
+
+``
+./run
+``
+
+And after boot we see:
+
+``
+<6>[    0.000000] I'VE HACKED THE LINUX KERNEL!!!
+``
+
+= Kernel GDB step debugging just works
+{parent=Linux Kernel Module Cheat}
+
+Start QEMU and wait for GDB:
+``
+./run --gdb-wait
+``
+
+Connect GDB to QEMU and run up to a symbol that shows up at boot:
+``
+./run-gdb start_kernel
+``
+
+Outcome:
+``
+``
+
+= Multiple architectures supported
+{parent=Linux Kernel Module Cheat}
+
+E.g., if you want aarch64:
+
+``
+./build -aA
+./run -aA
+``
+
+That's it.
+
+= Lots of in-tree examples
+{parent=Linux Kernel Module Cheat}
+
+= Kernel modules
+{parent=Lots of in-tree examples}
+
+https://github.com/cirosantilli/linux-kernel-module-cheat/blob/master/kernel_modules/hello.c[kernel_modules/hello.c]
+
+``
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+static int myinit(void)
+{
+	pr_info("hello init\n");
+	/* 0 for success, any negative value means failure,
+	 * E* consts if you want to specify failure cause.
+	 * https://www.linux.com/learn/kernel-newbie-corner-loadable-kernel-modules-coming-and-going */
+	return 0;
+}
+
+static void myexit(void)
+{
+	pr_info("hello exit\n");
+}
+
+module_init(myinit)
+module_exit(myexit)
+MODULE_LICENSE("GPL");
+``
+
+= Assembly
+{parent=Lots of in-tree examples}
+
+Assertions! The best way to learn assembly.
+
+https://github.com/cirosantilli/linux-kernel-module-cheat/blob/master/userland/arch/x86_64/add.S[userland/arch/x86_64/add.S]
+
+``
+#include <lkmc.h>
+
+LKMC_PROLOGUE
+    /* Register immediate. */
+    mov $1, %rax
+    add $2, %rax
+    LKMC_ASSERT_EQ(%rax, $3)
+LKMC_EPILOGUE
+``
+
+= Bare metal!
+{parent=Lots of in-tree examples}
+
+Powered by crosstool-NG:
+
+https://github.com/cirosantilli/linux-kernel-module-cheat/blob/master/baremetal/arch/aarch64/semihost_exit.S[baremetal/arch/aarch64/semihost_exit.S]
+
+``
+.global main
+main:
+    /* 0x20026 == ADP_Stopped_ApplicationExit */
+    mov x1, 0x26
+    movk x1, 2, lsl 16
+    str x1, [sp, 0]
+
+    /* Exit status code. Host QEMU process exits with that status. */
+    mov x0, 0
+    str x0, [sp, 8]
+
+    /* x1 contains the address of parameter block.
+     * Any memory address could be used.
+     */
+    mov x1, sp
+
+    /* SYS_EXIT */
+    mov w0, 0x18
+
+    /* Do the semihosting call on A64. */
+    hlt 0xf000
+``
+
 = All GitHub commit emails
 {parent=Aratu Week 2024 Talk by Ciro Santilli}
 {tag=/All GitHub commit emails}

computer.bigb

@@ -7,7 +7,7 @@ Much more useful than instruments used in inferior arts, such as pianos or paint
 
 Unlike other humans, computers are mindless slaves that do exactly what they are told to, except for https://www.youtube.com/watch?v=aNzTUdOHm9A[occasional cosmic ray bit flips]. Until they <artificial general intelligence>[take over the world that is].
 
-\Video[https://www.youtube.com/watch?v=rTRzYjoZhIY]
+\Video[https://www.youtube.com/watch?v=KmuP8gsgWb8]
 {title=A <computer> is the equivalent of a bicycle for our minds by <Steve Jobs> (1980)}
 {description=Likely an excerpt from an interview done for a documentary in 1980. TODO exact source.}
 

react.bigb

@@ -26,7 +26,7 @@ and then the new comment easily gets the callback attached to it.
 
 And it also ends up naturally doubling as a template engine.
 
-But React can also be extremelly hard to use. It can be very hard to know what you can and cannot do sometimes, then you have to stop and try to understand how react works things better:
+But React can also be extremely hard to use. It can be very hard to know what you can and cannot do sometimes, then you have to stop and try to understand how react works things better:
 * <cannot update a component while rendering a different component warning in React>
 * Rendered more hooks than during the previous render.
 * cannot use hooks from helpers: