https://bugs.llvm.org/show_bug.cgi?id=45632
Bug ID: 45632
Summary: Linux kernel's multi_v5_defconfig no longer boots
after max-page-size increase to 64k
Product: lld
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: ELF
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
https://github.com/llvm/llvm-project/commit/87383e408d41623ada41e2bbc371b037fa29e894
To reproduce (assuming LLVM/clang, arm-linux-gnueabi binutils, zstd, and
qemu-system-arm are in your PATH):
$ git clone -b v5.7-rc2
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ git clone https://github.com/ClangBuiltLinux/boot-utils
$ make -C linux -j$(nproc) -s ARCH=arm CC=clang
CROSS_COMPILE=arm-linux-gnueabi- LLVM=1 O=out/arm32 distclean
multi_v5_defconfig zImage aspeed-bmc-opp-palmetto.dtb
$ ./boot-utils/boot-qemu.sh -a arm32_v5 -k linux/out/arm32 -t 30s
...
+ RET=124
...
To test the behavior before that change:
$ sed -i '55 a KBUILD_LDFLAGS\t+= -z max-page-size=4096'
linux/arch/arm/Makefile
$ make -C linux -j$(nproc) -s ARCH=arm CC=clang
CROSS_COMPILE=arm-linux-gnueabi- LLVM=1 O=out/arm32 distclean
multi_v5_defconfig zImage aspeed-bmc-opp-palmetto.dtb
$ ./boot-utils/boot-qemu.sh -a arm32_v5 -k linux/out/arm32 -t 30s
...
Linux version 5.7.0-rc2-dirty (nathan@ubuntu-s3-xlarge-x86) (ClangBuiltLinux
clang version 11.0.0 (git://github.com/llvm/llvm-project
a9b137f9ffba8cb25dfd7dd1fb613e8aac121b37), LLD 11.0.0
(git://github.com/llvm/llvm-project a9b137f9ffba8cb25dfd7dd1fb613e8aac121b37))
#1 PREEMPT Tue Apr 21 13:21:14
...
I am unsure of how to debug this further. I tried attaching gdb to vmlinux but
it looks like the boot gets stuck extremely early, it does not even make it to
start_kernel.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
