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Hi Eric,
I just realized that my recent patches of kdump for i386 broke kexec-tools
compilation on x86-64 machine. Here is a patch attached to fix the problem.
Thanks
Vivek
o This patch fixes a x86_64 compilation failure issue. Recent patches
changed the function signature of funciton setup_linux_system_parameters().
Additional parameter kexec_flags is being passed now. This patch makes
sure that this function is called with appropriate parameters.
o x86_64 code also compiles i386 elf32 vmlinux loader code. i386 elf loader
code inturn uses crashdump code (crashdump-x86.c). Modified x86_64
makefile to compile crashdump-x86.c as well.
o phdr->vaddr size type unsigened int. Did minor modificaition to make sure
it compiles without warnings in x86_64 context.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
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o This is temporary hack patch to avoid any kexec segment being put in
small memory hole between data and bss segments (Valid only for some older
ld versions). This data is stomped by new kernel as kernel somehow thinks
it to be part of bss.
o This should be removed once the problem is fixed at kernel level.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
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o For i386, Physical memory upto 896MB is linearly mapped. Hence virtual
addresses for linearly mapped region are known.
o This patch sets the appropriate virtual addresses in core headers for
linearly mapped region.
o Enables gdb to debug linearly mapped region without any special user space
utility. Otherwise, capture tools first need to analyze the core image (Read
page tables and/or vm areas) and determine virtual addresses for memory
chunks and then regenerate the elf headers suitable for debugging with gdb.
o Some cases like 4G/4G split deviate from 896MB linearly mapped region and
might have different value for PAGE_OFFSET. Probably its a good idea to
export the linear region from kernel and use that instead of hard coding it.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
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o Creates a segment for storing elf headers.
o Creates Elf headers for dump capture.
o Functionality to modify command line internally. (Appending elfcorehdr= and
user defined memory map, memap=exactmap).
o Adds command line option to choose between ELF32 and ELF64 headers for core.
o As of today, gdb does not open ELF64 core file for i386 systems. So for
users who don't have PAE systems, can generate ELF32 headers by specifying
--elf32-core-headers on kexec command line. --elf64-core-headers forces
generation of ELF64 headers. ELF64 headers are generated by default.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
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