um: Fix ptrace GETREGS/SETREGS bugs

This fix two related bugs:
* PTRACE_GETREGS doesn't get the right orig_ax (syscall) value
* PTRACE_SETREGS can't set the orig_ax value (erased by initial value)

Get rid of the now useless and error-prone get_syscall().

Fix inconsistent behavior in the ptrace implementation for i386 when
updating orig_eax automatically update the syscall number as well. This
is now updated in handle_syscall().

Signed-off-by: Mickaël Salaün <[email protected]>
Cc: Jeff Dike <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Will Drewry <[email protected]>
Cc: Thomas Meyer <[email protected]>
Cc: Nicolas Iooss <[email protected]>
Cc: Anton Ivanov <[email protected]>
Cc: Meredydd Luff <[email protected]>
Cc: David Drysdale <[email protected]>
Signed-off-by: Richard Weinberger <[email protected]>
Acked-by: Kees Cook <[email protected]>

0 files changed, 0 insertions, 0 deletions