diff options
| 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/x86/um/shared | |
| 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/x86/um/shared')
| -rw-r--r-- | arch/x86/um/shared/sysdep/ptrace_64.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/um/shared/sysdep/ptrace_64.h b/arch/x86/um/shared/sysdep/ptrace_64.h index 919789f1071e..0dc223aa1c2d 100644 --- a/arch/x86/um/shared/sysdep/ptrace_64.h +++ b/arch/x86/um/shared/sysdep/ptrace_64.h @@ -57,8 +57,6 @@ #define UPT_SYSCALL_ARG5(r) UPT_R8(r) #define UPT_SYSCALL_ARG6(r) UPT_R9(r) -static inline void arch_init_registers(int pid) -{ -} +extern void arch_init_registers(int pid); #endif |