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authorChris Metcalf <cmetcalf@tilera.com>2013-08-07 16:03:08 -0400
committerChris Metcalf <cmetcalf@tilera.com>2013-08-13 16:26:31 -0400
commit9ae09838470a68edf0245cd60c623df2d5993a8f (patch)
treef5b71e4c830d729900b10035f0f525b85ca634ed /samples
parentfad052dc4be7b1d9e7ff40ccd8ba2b8216823b51 (diff)
tile: provide traceability for hypervisor calls
This change adds infrastructure (CONFIG_TILE_HVGLUE_TRACE) that provides C code wrappers for the calls the kernel makes to the Tilera hypervisor. This allows standard kernel infrastructure like FTRACE to be able to instrument hypervisor calls. To allow direct calls to the true API, we export their names with a leading underscore as well. This is important for the few contexts where we need to make hypervisor calls without touching the stack. As part of this change, we also switch from creating the symbols with linker magic to creating them with assembler magic. This lets us provide a symbol type and generally make them appear more as symbols and less as just random values in the Elf namespace. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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