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authorRoland McGrath <roland@redhat.com>2008-01-30 13:31:45 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:31:45 +0100
commitbae3f7c39dee5951bcbedeaedb6744f882a00173 (patch)
treeb11d7246f1933f80c33c1a5cff6291ab142e87dc /fs
parent4206d3aa1978e44f58bfa4e1c9d8d35cbf19c187 (diff)
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x86: user_regset helpers
This adds some inlines to linux/regset.h intended for arch code to use in its user_regset get and set functions. These make it pretty easy to deal with the interface's optional kernel-space or user-space pointers and its generalized access to a part of the register data at a time. In simple cases where the internal data structure matches the exported layout (core dump format), a get function can be nothing but a call to user_regset_copyout, and a set function a call to user_regset_copyin. In other cases the exported layout is usually made up of a few pieces each stored contiguously in a different internal data structure. These helpers make it straightforward to write a get or set function by processing each contiguous chunk of the data in order. The start_pos and end_pos arguments are always constants, so these inlines collapse to a small amount of code. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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