Bug#757697: RFE: Autodetection of architecture at boot time to load appropiate kernel
El 15/08/14 a las 13:04, Daniel Baumann escribió:
On 08/15/2014 07:12 AM, adrian15 wrote:
I attach a patch for Isolinux / Syslinux implementation for cpu detection.
nice, thanks.
from a quick look, sounds good. will check, test, and apply next week.
As suggested (by another bug) I attach both patches / commits updated so
that they are based on debian-next branch.
Related branch can be found at:
https://github.com/adrian15/live-build/commits/rescatux_0.32_debian-next_arch_detection_rebased
adrian15
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commit 5852a69976da36abd7bcbbce95807a7a2451a7a6
Author: Adrian Gibanel Lopez <adrian.gibanel@btactic.com>
Date: Sun Dec 7 17:46:07 2014 +0100
Syslinux build now supports: Arch detection
It adds a default boot option that automatically chooses either amd64 or x86 kernel depending on the detected cpu flags.
diff --git a/scripts/build/binary_syslinux b/scripts/build/binary_syslinux
index abd900a..d59bd05 100755
--- a/scripts/build/binary_syslinux
+++ b/scripts/build/binary_syslinux
@@ -233,6 +233,12 @@ case "${LB_BUILD_WITH_CHROOT}" in
;;
esac
+# Copy necessary syslinux modules
+for module in ifcpu64.c32
+do
+ cp "chroot/usr/lib/syslinux/modules/bios/${module}" "${_TARGET}/"
+done
+
# Configuring files
if [ -e "${_TARGET}/live.cfg.in" ]
then
@@ -255,6 +261,22 @@ then
;;
*)
+ _AMD64_486_NUMBER="0"
+
+ for _FLAVOUR in ${LB_LINUX_FLAVOURS}
+ do
+ if [ "${_FLAVOUR}" = "amd64" -o "${_FLAVOUR}" = "486" ] ; then
+ _AMD64_486_NUMBER="$((${_AMD64_486_NUMBER} + 1))"
+ fi
+ done
+
+ if [ "${_AMD64_486_NUMBER}" -ge 2 ] ; then
+ _AMD64_LABEL=$(cat "${_TARGET}/live.cfg.in" | grep "^label" | grep -v "failsafe" | sed 's/label //g' | sed -e "s|@FLAVOUR@|""amd64""|g")
+ _486_LABEL=$(cat "${_TARGET}/live.cfg.in" | grep "^label" | grep -v "failsafe" | sed 's/label //g' | sed -e "s|@FLAVOUR@|""486""|g")
+ _AUTO_LABEL=$(cat "${_TARGET}/live.cfg.in" | grep "^label" | grep -v "failsafe" | sed 's/label //g' | sed -e "s|@FLAVOUR@|""autodetect""|g")
+ _AUTO_MENU_LABEL=$(cat "${_TARGET}/live.cfg.in" | grep "menu label" | grep -v "failsafe" | sed 's/.*menu label //g' | sed -e "s|@FLAVOUR@|""auto""|g")
+ fi
+
_NUMBER="0"
for _FLAVOUR in ${LB_LINUX_FLAVOURS}
@@ -269,7 +291,22 @@ then
echo "" >> "${_TARGET}/live.cfg"
grep -v 'menu default' "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
else
- cat "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
+ if [ "${_AMD64_486_NUMBER}" -ge 2 ] ; then
+ cat << EOF >> "${_TARGET}/live.cfg"
+label ${_AUTO_LABEL}
+ menu label ${_AUTO_MENU_LABEL}
+ com32 ifcpu64.c32
+ append ${_AMD64_LABEL} -- ${_486_LABEL} -- ${_486_LABEL}
+
+EOF
+ fi
+
+
+ if [ "${_AMD64_486_NUMBER}" -ge 2 ] ; then
+ grep -v 'menu default' "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
+ else
+ cat "${_TARGET}/live.cfg.in" >> "${_TARGET}/live.cfg"
+ fi
fi
sed -i -e "s|@FLAVOUR@|${_FLAVOUR}|g" \
commit 36f781c4dc55e9a0d14cc74df5ff36f9eac2e33f
Author: Adrian Gibanel Lopez <adrian.gibanel@btactic.com>
Date: Sun Dec 7 17:50:16 2014 +0100
Grub2 build now supports: Arch detection
It adds a default boot option that automatically chooses either amd64 or x86 kernel depending on the detected cpu flags.
diff --git a/scripts/build/binary_grub2 b/scripts/build/binary_grub2
index bf5f8ce..a23c2f9 100755
--- a/scripts/build/binary_grub2
+++ b/scripts/build/binary_grub2
@@ -60,6 +60,16 @@ Restore_cache cache/packages.binary
Install_package
# Local functions
+Grub_live_entry_commands ()
+{
+ KERNEL="${1}"
+ INITRD="${2}"
+ APPEND="${3}"
+
+ LINUX_LIVE="${LINUX_LIVE}\nlinux\t\t/${KERNEL} ${INITFS:+boot=${INITFS} }config LB_BOOTAPPEND_LIVE ${APPEND}"
+ LINUX_LIVE="${LINUX_LIVE}\ninitrd\t\t/${INITRD}"
+}
+
Grub_live_entry ()
{
LABEL="${1}"
@@ -68,8 +78,25 @@ Grub_live_entry ()
APPEND="${4}"
LINUX_LIVE="${LINUX_LIVE}\nmenuentry \"Debian GNU/Linux - ${LABEL}\" {"
- LINUX_LIVE="${LINUX_LIVE}\nlinux\t\t/${KERNEL} ${INITFS:+boot=${INITFS} }config LB_BOOTAPPEND_LIVE ${APPEND}"
- LINUX_LIVE="${LINUX_LIVE}\ninitrd\t\t/${INITRD}"
+ Grub_live_entry_commands "${KERNEL}" "${INITRD}" "${APPEND}"
+ LINUX_LIVE="${LINUX_LIVE}\n}"
+}
+
+Grub_live_autodetect_entry ()
+{
+ LABEL="${1}"
+ AMD64_KERNEL="${2}"
+ AMD64_INITRD="${3}"
+ _486_KERNEL="${4}"
+ _486_INITRD="${5}"
+ APPEND="${6}"
+
+ LINUX_LIVE="${LINUX_LIVE}\nmenuentry \"Debian GNU/Linux - ${LABEL}\" {"
+ LINUX_LIVE="${LINUX_LIVE}\nif cpuid -l ; then"
+ Grub_live_entry_commands "${AMD64_KERNEL}" "${AMD64_INITRD}" "${APPEND}"
+ LINUX_LIVE="${LINUX_LIVE}\nelse"
+ Grub_live_entry_commands "${_486_KERNEL}" "${_486_INITRD}" "${APPEND}"
+ LINUX_LIVE="${LINUX_LIVE}\nfi"
LINUX_LIVE="${LINUX_LIVE}\n}"
}
@@ -153,6 +180,29 @@ LB_BOOTAPPEND_LIVE="$(echo ${LB_BOOTAPPEND_LIVE} | sed -e 's| ||')"
# Assembling kernel configuration
+_AMD64_486_NUMBER="0"
+
+for _FLAVOUR in ${LB_LINUX_FLAVOURS}
+do
+ if [ "${_FLAVOUR}" = "amd64" -o "${_FLAVOUR}" = "486" ] ; then
+ _AMD64_486_NUMBER="$((${_AMD64_486_NUMBER} + 1))"
+ fi
+done
+
+if [ "${_AMD64_486_NUMBER}" -ge 2 ] ; then
+ # Default entries
+ AMD64_KERNEL="$(basename chroot/boot/vmlinuz-*amd64)"
+ AMD64_INITRD="initrd.img-$(echo ${AMD64_KERNEL} | sed -e 's|vmlinuz-||')"
+ _486_KERNEL="$(basename chroot/boot/vmlinuz-*486)"
+ _486_INITRD="initrd.img-$(echo ${_486_KERNEL} | sed -e 's|vmlinuz-||')"
+
+ Grub_live_autodetect_entry "live (autodetect)" \
+ "$(basename ${DESTDIR_LIVE})/${AMD64_KERNEL}" \
+ "$(basename ${DESTDIR_LIVE})/${AMD64_INITRD}" \
+ "$(basename ${DESTDIR_LIVE})/${_486_KERNEL}" \
+ "$(basename ${DESTDIR_LIVE})/${_486_INITRD}"
+fi
+
# Default entries
DEFAULT_FLAVOUR="$(echo ${LB_LINUX_FLAVOURS} | awk '{ print $1 }')"
DEFAULT_KERNEL="$(basename chroot/boot/vmlinuz-*${DEFAULT_FLAVOUR})"
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