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author | Eli Cooper <elicooper@gmx.com> | 2016-03-20 00:58:41 +0800 |
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committer | Richard Weinberger <richard@nod.at> | 2016-05-21 23:38:06 +0200 |
commit | a78ff1112263fdd871d3506dbcff44f6f12e8423 (patch) | |
tree | e57ced8c83977e3686b8a69343cc5541565b8b94 /ipc/sem.c | |
parent | b6024b21fec8367ef961a771cc9dde31f1831965 (diff) | |
download | linux-a78ff1112263fdd871d3506dbcff44f6f12e8423.tar.bz2 |
um: add extended processor state save/restore support
This patch extends save_fp_registers() and restore_fp_registers() to use
PTRACE_GETREGSET and PTRACE_SETREGSET with the XSTATE note type, adding
support for new processor state extensions between context switches.
When the new ptrace requests are unavailable, it falls back to the old
PTRACE_GETFPREGS and PTRACE_SETFPREGS methods, which have been renamed to
save_i387_registers() and restore_i387_registers().
Now these functions expect *fp_regs to have the space of an _xstate struct.
Thus, this also makes ptrace in UML responde to PTRACE_GETFPREGS/_SETFPREG
requests with a user_i387_struct (thus independent from HOST_FP_SIZE), and
by calling save_i387_registers() and restore_i387_registers() instead of
the extended save_fp_registers() and restore_fp_registers() functions.
Signed-off-by: Eli Cooper <elicooper@gmx.com>
Diffstat (limited to 'ipc/sem.c')
0 files changed, 0 insertions, 0 deletions