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| author | Eli Cooper <elicooper@gmx.com> | 2016-03-19 19:58:41 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2016-05-22 00:38:06 +0300 |
| commit | a78ff1112263fdd871d3506dbcff44f6f12e8423 (patch) | |
| tree | e57ced8c83977e3686b8a69343cc5541565b8b94 /arch/um/include | |
| parent | b6024b21fec8367ef961a771cc9dde31f1831965 (diff) | |
| download | linux-a78ff1112263fdd871d3506dbcff44f6f12e8423.tar.xz | |
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 'arch/um/include')
| -rw-r--r-- | arch/um/include/shared/registers.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/include/shared/registers.h b/arch/um/include/shared/registers.h index f5b76355ad71..a74449b5b0e3 100644 --- a/arch/um/include/shared/registers.h +++ b/arch/um/include/shared/registers.h @@ -9,6 +9,8 @@ #include <sysdep/ptrace.h> #include <sysdep/archsetjmp.h> +extern int save_i387_registers(int pid, unsigned long *fp_regs); +extern int restore_i387_registers(int pid, unsigned long *fp_regs); extern int save_fp_registers(int pid, unsigned long *fp_regs); extern int restore_fp_registers(int pid, unsigned long *fp_regs); extern int save_fpx_registers(int pid, unsigned long *fp_regs); |