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Remove kexec/arch/i386/compat_x6_64.S
purgatory/arch/i386/linux-entry16.S and purgatory/arch/i386/entry16.S
Those were early attempts at entry32-16.S that should have been
deleted long ago.
Strip the purgatory code of debug symbols. There is no need to carry
debug symbols we will never use around in /sbin/kexec.
On x86_64 use -mcmodel=large so that the code is built without
any 32bit assumptions. -mcmodel=medium and -mcmodel=small
result int code that has 32bit relocations against variables
that can live anywhere in the address space
Modify the assembly in entry64.S and setup-x86_64.S to use %rip
relative addressing of variables so no relocates are emitted.
Modify entry64-32.S so that it does not have any relocations that can
not be processed when purgatory is loaded above 4G. entry64-32.S
jumps to a 32bit entry point and can not itself be used above 4G so
these changes merely prevent it from being a problem in the other case.
eip is modifed to be a 64bit value of which only the low 32bits are
exported outside of entry64-32.S
The long mode exit code is modified to run with a %cs value whose
base address is the address of the symbol entry32. From there
all of the 32bit code in entry64-32.S can read variables by reading
them through %cs. Until the final jump to the the target address
which is made a far jump reloading %cs and the intstruction pointer.
Modify entry32-16.S and entry32-16-debug.S to be position independent
32bit code. At their start make a short call to push the current value
of %eip on the stack and pop it off. Allowing the calculation of the
address of entry16 which the code has always kept in %ebx.
Update the pointer to the gdt in the gdt so that lgdt will work.
Modify the instructions in entry32-16.S and entry32-16-debug.S so
that the 32bit code uses offsets from %ebx which points at entry16.
Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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The generated code is byte-for-byte identical.
Signed-off-by: Jamey Sharp <jamey@thetovacompany.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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o Currently DEBUG macro is being used at some places by purgatory code. We
need this DEBUG macro to be defined by user at compile time for including
or excluding the debug code. -DDEBUG is more common practice to use for
this purpose. Hence, changing DEBUG() to DEBUG_CHAR() and make space
for DEBUG to be defined by user.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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- Initial import into git
- initial nbi image formage support
- ppc32 initial register setting fixes.
- gzipped multiboot file support
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