Update the linux kernel for sysb/c to 4.9.10.

- We do not use latest 4.9.x because it relies on a new version of
  binutils, while older versions do not. (Note: we should be able to go
  a bit newer but I didn't bother testing >50 versions to figure this
  out).
- We do not use newer kernel versions because they require one or more
  of (new perl, new binutils, new make, new gcc, new bison, new tar).
- sysb and sysc are updated to use the SATA (libata) subsystem (aka sda)
  instead of IDE-emulating SATA subsystem (aka hda) which is now
  available to us.
- While theoretically according to docs 4.9 should work OOTB with our
  version of binutils this is not the case, so we have to do a bit of
  (interesting) patching. But this does not break anything.
- Thankfully serial support in 4.9 is not screwed over like it is in 2.6
  so we can revert to that.
- 4.9 has the linux-libre project at our disposal, instead of gNewSense.
  So we use this. Unfortunatley that takes forever because we have to
  use sed because our version of gawk is too old/buggy. :( I plan to
  introduce very shortly 1. parallelism 2. 'sysc snapshot' which will
  start from sysc to avoid this. I do not want to use linux-libre
  tarballs because they make modificiations directly from this script
  (aka not easily verifiable, use the source!) and this script allows
  for much greater flexibility.
- We compile the initramfs ahead-of-build using the in-tree cpio
  generator instead of also building cpio to use less packages. We do
  NOT build the initramfs into the kernel like 2.6 (unsupported).
- Oh and fix a kexec-tools checksum.

sysa/linux-4.9.10/linux-4.9.10.sh

@@ -0,0 +1,62 @@
+# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_unpack() {
+    default || true # Predictable link errors - not a problem
+
+    cp ../src/deblob-4.9 ../src/deblob-check ${pkg}/ 
+
+    # Clear up storage space
+    rm -rf ../src
+}
+
+generate_autoconf_h() {
+    # generate include/linux/autoconf.h -- we do not have gperf rn to do it the normal way
+    mkdir -p include/generated
+    # Transform each of the CONFIG_* options that are =y into header
+    grep -E '=y$' .config | sed 's/=y$/ 1/' | sed 's/^/#define /' >> include/generated/autoconf.h
+    # Transform each of the CONFIG_* options that are unset into headers
+    grep -E ' is not set$' .config | sed 's/ is not set$//' | sed 's/#/#undef/' >> include/generated/autoconf.h
+    # Transform each of the non-boolean options into headers
+    grep -E '=.*$' .config | grep -v -E '=y$' | sed 's/=/ /' | sed 's/^/#define /' >> include/generated/autoconf.h
+}
+
+src_prepare() {
+    default
+
+    mv config .config
+    mkdir -p include/config
+    cp .config include/config/auto.conf
+
+    generate_autoconf_h
+
+    # Deblob the kernel
+    chmod +x deblob-4.9 deblob-check
+    # Don't use gawk, use sed
+    AWK=dosentexist ./deblob-4.9 
+
+    # Remove shipped files
+    find . -name "*_shipped*" -delete
+}
+
+src_compile() {
+    # Generate the initramfs so we can remove /sysb
+    make ARCH=i386 prepare
+    make ARCH=i386 usr/
+    mkdir -p "${PREFIX}/boot"
+    mv usr/initramfs_data.cpio.gz "${PREFIX}/boot/initramfs-sysb"
+    make clean
+    rm -rf /sysb
+    sed -i 's:/sysb::' .config
+    cp .config include/config/auto.conf
+    rm include/generated/autoconf.h
+    generate_autoconf_h
+
+    make ARCH=i386 prepare
+    make ARCH=i386
+}
+
+src_install() {
+    cp arch/i386/boot/bzImage "${PREFIX}/boot/linux-4.9.10"
+}

sysa/linux-4.9.10/patches/bad-asm.patch

@@ -0,0 +1,18 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+Remove the 68() which I'm not really sure what it does but still works and
+breaks our version of binutils.
+
+--- arch/x86/boot/bioscall.S	2021-07-31 17:50:09.519480274 +1000
++++ arch/x86/boot/bioscall.S	2021-07-31 18:21:32.086972277 +1000
+@@ -65,7 +65,7 @@
+ 	movw	%ax, %es
+ 
+ 	/* Copy output state from stack frame */
+-	movw	68(%esp), %di	/* Original %cx == 3rd argument */
++	movw	%sp, %di	/* Original %cx == 3rd argument */
+ 	andw	%di, %di
+ 	jz	4f
+ 	movw	%sp, %si

sysa/linux-4.9.10/patches/disable-broken-check.patch

@@ -0,0 +1,22 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+There's something incorrect with this macro for live-bootstrap, most likely as
+a result of the dodgy installation of linux-headers. However, there is no
+problem with this, and it is verified that BITS_PER_LONG __BITS_PER_LONG
+have functional and correct values.
+
+--- tools/include/asm-generic/bitsperlong.h	2021-07-31 11:50:26.616768608 +1000
++++ tools/include/asm-generic/bitsperlong.h	2021-07-31 11:50:36.786847443 +1000
+@@ -9,10 +9,6 @@
+ #define BITS_PER_LONG __WORDSIZE
+ #endif
+ 
+-#if BITS_PER_LONG != __BITS_PER_LONG
+-#error Inconsistent word size. Check asm/bitsperlong.h
+-#endif
+-
+ #ifndef BITS_PER_LONG_LONG
+ #define BITS_PER_LONG_LONG 64
+ #endif

sysa/linux-4.9.10/patches/linking.patch

@@ -0,0 +1,17 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+This seemingly useless statement (redefined a couple of lines later) is
+not liked by our version of binutils.
+
+--- arch/x86/kernel/vmlinux.lds.S	2021-07-31 18:45:14.787124887 +1000
++++ arch/x86/kernel/vmlinux.lds.S	2021-07-31 18:43:16.234180449 +1000
+@@ -170,7 +170,6 @@
+ 		. = __vvar_beginning_hack + PAGE_SIZE;
+ 	} :data
+ 
+-       . = ALIGN(__vvar_page + PAGE_SIZE, PAGE_SIZE);
+ 
+ 	/* Init code and data - will be freed after init */
+ 	. = ALIGN(PAGE_SIZE);

sysa/linux-4.9.10/patches/regen.patch

@@ -0,0 +1,18 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+We do not use the _shipped version of the keymap generated using loadkeys.
+For some reason the makefile needs to be patched for this to work...
+
+--- drivers/tty/vt/Makefile	2021-07-27 21:11:24.743104498 +1000
++++ drivers/tty/vt/Makefile	2021-07-27 21:11:34.261186200 +1000
+@@ -22,7 +22,7 @@
+ # Uncomment if you're changing the keymap and have an appropriate
+ # loadkeys version for the map. By default, we'll use the shipped
+ # versions.
+-# GENERATE_KEYMAP := 1
++GENERATE_KEYMAP := 1
+ 
+ ifdef GENERATE_KEYMAP
+ 

sysa/linux-4.9.10/patches/remove-alternative-asm.patch

@@ -0,0 +1,34 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+Our older version of binutils dosen't play very nicely with binutils for a
+couple of edgecase macros. It seems that ALTERNATIVE is one of these. As we
+know what your system will be (not Xen), we can manually evaluate and write
+out the ALTERNATIVEs.
+
+--- arch/x86/entry/entry_32.S	2021-07-31 11:40:07.458032771 +1000
++++ arch/x86/entry/entry_32.S	2021-07-31 11:40:42.835298841 +1000
+@@ -412,9 +412,8 @@
+ 
+ 	movl	%esp, %eax
+ 	call	do_fast_syscall_32
+-	/* XEN PV guests always use IRET path */
+-	ALTERNATIVE "testl %eax, %eax; jz .Lsyscall_32_done", \
+-		    "jmp .Lsyscall_32_done", X86_FEATURE_XENPV
++	testl %eax, %eax
++	jz .Lsyscall_32_done
+ 
+ /* Opportunistic SYSEXIT */
+ 	TRACE_IRQS_ON			/* User mode traces as IRQs on. */
+--- arch/x86/entry/vdso/vdso32/system_call.S	2021-07-31 11:41:40.379731622 +1000
++++ arch/x86/entry/vdso/vdso32/system_call.S	2021-07-31 11:43:40.294633506 +1000
+@@ -55,8 +55,6 @@
+ 	/* If SYSENTER (Intel) or SYSCALL32 (AMD) is available, use it. */
+ 	ALTERNATIVE_2 "", SYSENTER_SEQUENCE, X86_FEATURE_SYSENTER32, \
+ 	                  SYSCALL_SEQUENCE,  X86_FEATURE_SYSCALL32
+-#else
+-	ALTERNATIVE "", SYSENTER_SEQUENCE, X86_FEATURE_SEP
+ #endif
+ 
+ 	/* Enter using int $0x80 */

sysa/linux-4.9.10/patches/remove-kconfig.patch

@@ -0,0 +1,23 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+kconfig uses gperf, which we don't have at this stage. We manually generate
+everything (in the actual script) that is actually required within kconfig,
+and forgo everything that is not really required for the build.
+
+--- Makefile	2021-07-30 21:25:43.577592065 +1000
++++ Makefile	2021-07-30 21:26:40.349015612 +1000
+@@ -547,10 +547,10 @@
+ export KBUILD_DEFCONFIG KBUILD_KCONFIG
+ 
+ config: scripts_basic outputmakefile FORCE
+-	$(Q)$(MAKE) $(build)=scripts/kconfig $@
++	$(Q)true
+
+ %config: scripts_basic outputmakefile FORCE
+-	$(Q)$(MAKE) $(build)=scripts/kconfig $@
++	true
+
+ else
+ # ===========================================================================

sysa/linux-4.9.10/patches/use-less-ram.patch

@@ -0,0 +1,22 @@
+SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
+
+SPDX-License-Identifier: GPL-2.0-only
+
+For some reason (old version of sed/bash?), this falsepos sed thing uses a
+lot of RAM within bash and causes an overflow which is caught by bash
+but prompts it to crash. As we are not using falsepos detection anyway it
+is unused and hence can be set to an empty value.
+
+--- deblob-check	2021-07-30 09:28:09.324276561 +1000
++++ deblob-check	2021-07-30 09:28:31.742449255 +1000
+@@ -7232,9 +7232,7 @@
+ # $4 is the action for every complete input pattern.
+ 
+ set_sed_main () {
+-  falsepos=`${SED-sed} -n 's,^[+]\^*,,p' < "$regex_name" |
+-    ${SED-sed} -n -e 's,[$]$,\\\\([\\\\n]\\\\|$\\\\),' \
+-	-e '1h; 1!H; ${g;s,[\n],\\\\|,g;s,^\(..*\)$,\\\\(\1\\\\),;p;}'`
++  falsepos=
+   blobs=`${SED-sed} -n 's,^[-],,p' < "$regex_name" |
+     ${SED-sed} -n -e 's,[$]$,\\\\([\\\\n]\\\\|$\\\\),' \
+ 	-e '1h; 1!H; ${g;s,[\n],\\\\|,g;s,^\(..*\)$,\\\\(\1\\\\),;p;}'`