Mainly added some environment configurations, macro definitions, specific
architecture structures and some function declarations supported by the
LoongArch64 architecture.
Co-developed-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Ming Wang <wangming01@loongson.cn>
This patch mainly added some environment configurations, macro definitions,
specific architecture structures and some function declarations supported
by the RISCV64 architecture.
We can use the build command to get the simplest version crash tool:
make target=RISCV64 -j2
Co-developed-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Three fixes for MIPS64 kernels:
(1) To support ramdumps, add the machine_type() check for MIPS64 in
ramdump_to_elf().
(2) To fix a stuck issue when invoking crash with "-d1" or larger
debug value, add the machine_type() check to get the correct
dump NOTE offsets.
(3) Fix the reference file path to the definition of the pt_regs
structure, to which mips64_regster refers.
[ kh: merged three patches into one ]
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
are specified by the QEMU mem-path argument of a memory-backend-file
object. This allows the running of a live crash session against a
QEMU guest from the host machine. In this example, the /tmp/MEM file
on a QEMU host represents the guest's physical memory:
$ qemu-kvm ...other-options... \
-object memory-backend-file,id=MEM,size=128m,mem-path=/tmp/MEM,share=on \
-numa node,memdev=MEM -m 128
and a live session run can be run against the guest kernel like so:
$ crash <path-to-guest-vmlinux> live:/tmp/MEM@0
By prepending the ramdump image name with "live:", the crash session will
act as if it were running a normal live session.
(oleg@redhat.com)
(1) The MIPS general purpose registers in the elf_gregset_t
don't start at index 0 but at index 6.
(2) Adjust for the kernel's pt_regs structure changes between
kernel versions. For example, fields are inserted into the
middle based on build time options, and the amount of padding
at the head of the structure was changed relatively recently.
To handle this, split the structure definition into two parts
and get the offsets of these two parts dynamically.
(3) Do not display each parsed kernel symbol during initialization
when invoked with "crash -d8".
(4) Add support for loading raw MIPS ramdump dumpfiles.
(5) Add support for compressed kdump dumpfiles.
(rabinv@axis.com)
(1) task.c: initialize the "curr" and "curr_my_q" variables in the
dump_tasks_in_task_group_cfs_rq() function.
(2) ramdump.c: make the "rd" and "len" return values from read()
and write() calls in write_elf() to be ssize_t types.
(3) cmdline.c: make the parsed PATH string buffer equal to the size
of the PATH string + 1 to prevent a possible buffer overflow
when a command line starts with a "!".
(anderson@redhat.com)
more "ramdump" files may be entered on the crash command line
in an ordered pair format consisting of the RAM dump filename
and the starting physical address expressed in hexadecimal,
connected with an ampersand:
$ crash vmlinux ramdump@address [ramdump@address]
A temporary ELF header will be created in /var/tmp, and the
combination of the header and the ramdump file(s) will be handled
like a normal ELF vmcore. The ELF header will only exist during
the crash session. If desired, an optional "-o <filename>"
may be entered to create a permanent ELF vmcore file from the
ramdump file(s).
(vinayakm.list@gmail.com, paawan1982@yahoo.com, anderson@redhat.com)
Ming Wang
Xianting Tian
Youling Tang
Dave Anderson