mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 15:13:52 +00:00
96f9359345
Commit ffe8018c34 ("initramfs: fix initramfs size calculation") broke
32-bit big-endian arches like (on ARAnyM):
VFS: Cannot open root device "hda1" or unknown-block(3,1)
Please append a correct "root=" boot option; here are the available partitions:
fe80 1059408 nfhd8 (driver?)
fe81 921600 nfhd8p1 00000000-0000-0000-0000-000000000nfhd8p1
fe82 137807 nfhd8p2 00000000-0000-0000-0000-000000000nfhd8p2
0200 3280 fd0 (driver?)
0201 3280 fd1 (driver?)
0300 1059408 hda driver: ide-gd
0301 921600 hda1 00000000-0000-0000-0000-000000000hda1
0302 137807 hda2 00000000-0000-0000-0000-000000000hda2
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,1)
As pointed out by Kerstin Jonsson <kerstin.jonsson@ericsson.com>, this
is due to CONFIG_32BIT not being defined, so the initramfs size field is
done as a 64-bit quad. On little-endian (like x86) this doesn matter,
but on a big-endian machine the 32-bit reads will see the (zero) high
bits.
Only mips, s390, and score set CONFIG_32BIT for 32-bit builds, so fix it for
all other 32-bit arches by inverting the logic and testing for CONFIG_64BIT,
which should be defined on all 64-bit arches.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
[ I think we should just make it "u64" on all architectures and get
rid of the whole #ifdef CONFIG_xxBIT - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
38 lines
1.2 KiB
ArmAsm
38 lines
1.2 KiB
ArmAsm
/*
|
|
initramfs_data includes the compressed binary that is the
|
|
filesystem used for early user space.
|
|
Note: Older versions of "as" (prior to binutils 2.11.90.0.23
|
|
released on 2001-07-14) dit not support .incbin.
|
|
If you are forced to use older binutils than that then the
|
|
following trick can be applied to create the resulting binary:
|
|
|
|
|
|
ld -m elf_i386 --format binary --oformat elf32-i386 -r \
|
|
-T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
|
|
ld -m elf_i386 -r -o built-in.o initramfs_data.o
|
|
|
|
For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds.
|
|
|
|
The above example is for i386 - the parameters vary from architectures.
|
|
Eventually look up LDFLAGS_BLOB in an older version of the
|
|
arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
|
|
|
|
Using .incbin has the advantage over ld that the correct flags are set
|
|
in the ELF header, as required by certain architectures.
|
|
*/
|
|
|
|
#include <linux/stringify.h>
|
|
|
|
.section .init.ramfs,"a"
|
|
__irf_start:
|
|
.incbin __stringify(INITRAMFS_IMAGE)
|
|
__irf_end:
|
|
.section .init.ramfs.info,"a"
|
|
.globl __initramfs_size
|
|
__initramfs_size:
|
|
#ifdef CONFIG_64BIT
|
|
.quad __irf_end - __irf_start
|
|
#else
|
|
.long __irf_end - __irf_start
|
|
#endif
|