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

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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.
2021-08-04 03:56:07 +01:00
SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
SPDX-License-Identifier: GPL-2.0-only
Various fixes + cleanup. - Add parts.rst documentation for Linux kernel. - Completely fix problems caused by new bootstrap, update checksums for /usr. - Globalise populate_device_nodes. - Enable deblobbing.
2021-08-05 13:16:19 +01:00
Our older version of binutils doesn't play very nicely with binutils for a
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.
2021-08-04 03:56:07 +01:00
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 */