Create hvm64 test binaries as elf32, take 2

Experimentally, gcc/binutils from Debian Jessie (4.9.2/2.25) and CentOS
7.1 (4.8.3/2.23) don't make valid binaries when linking x86-64 object
files as elf32-x86-64.

Issues include corrupt DWARF debugging information (as confirmed by
gdb/readelf), and erroneously merged strings in .rodata (as confirmed by
strings).

Instead, link all binaries in their natural width, and objcopy hvm64
binaries to elf32-x86-64 after the fact.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Provide memset() and memcmp()

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Undo previous change to link.lds.S

1MB != 0x10000, and while this shouldn't actually matter, it causes the
domain builder to choke for HVM guests.

Revert for now, until the domain builders' behaviour is understood.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Introduce macros for basic number manipulation

And sprinkle them through the existing code.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Avoid failing to build if the last directory lacks a Makefile

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Automatically include config.h for all per-arch translation units

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Create hvm64 test binaries as elf32

New improvements to the HVM domain building logic actually sanity check the
binary for being 32bit, as all HVM domains start in 32bit mode.

Previously, elf64 binaries were erroneously accepted.

In addition, drop the big/little endian bits.  x86 is unlikely to ever have a
big endian variant.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Expose the GDT to C code

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Fix per-arch .S generation rule to properly pass $AFLAGS

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Modify default xl cfg files to name the VM identically to the kernel used

Suggested-by: Anshul Makkar <anshul.makkar@citrix.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Generate xl configuration files for tests

For now just the default configuration, which gets slightly customised
for each generated environment.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Only recurse into directories with a Makefile

Git will leave directories around by default when switching branches,
which causes unnecessary build failures.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Disable LTO for now

It clearly isn't wired up correctly at the moment, and causes build
issues on Debian Jessie.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Default CC to gcc

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Short summary of execution environment

Interface for test reports

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

HVM 32 and 64bit environment

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

HVM basic setup

 * Hypercalls
 * PV and Qemu console
 * Memory management
 * Pagetables

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

LDT/GDT infrastructure

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

x86 architectural MSR/CR constants and instruction wrappers

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Xen ABI bits for HVM guests

 - HVMOP_get_param
 - HVM PV Console parameters
 - Xen CPUID leaves

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Introduce and use a boot stack (one page)

HVM guests don't have one provided by the domain builder.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Introduce panic() and use it to cover some exceptional cases

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Use vsnprintf() to provide full formatting capabilities to the console

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Integer subset of vsnprintf(), including 64bit types in 32bit build

Also a test binary which compares this implementation to the local libc's
implementation.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Implement strnlen()

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Provide 64bit division in 32bit environments

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

PV Console driver.  Synchronous output only

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Ordering primitives, suitable for a shared ring

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Basic memory management for PV guests, sufficient to obtain the console ring virtual address

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Hypercall infrastructure needed for writing to a PV console

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Write to the hypervisor console

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Basic console and printk() infrastructure

printk() can currently only deal with a plain string, and the output goes
nowhere.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Architecture specific setup, obtaining the PV start_info page

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Basic hypercall infrastructure.  Tests now shut down as opposed to spinning in a loop

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Basic build system and pv32/64 stubs.  They currently spin in a loop

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Doxygen configuration

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Some introductory text files

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Initial commit

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>