* alpha-linux-tdep.c (alpha_linux_pc_in_sigtramp): New function.

* alpha-linux-tdep.c (alpha_linux_pc_in_sigtramp): New function.
(alpha_linux_init_abi): Set gdbarch_pc_in_sigtramp to
alpha_linux_pc_in_sigtramp.
* alpha-osf1-tdep.c (alpha_osf1_pc_in_sigtramp): New function.
(alpha_osf1_init_abi): Set gdbarch_pc_in_sigtramp to
alpha_osf1_pc_in_sigtramp.
* alpha-tdep.c (alpha_osf_in_sigtramp): Remove.
* alphafbsd-tdep.c (alphafbsd_pc_in_sigtramp): New function.
(alphafbsd_init_abi): Set gdbarch_pc_in_sigtramp to
alphafbsd_pc_in_sigtramp.
* alphanbsd-tdep.c (alphanbsd_pc_in_sigtramp): New function.
(alphanbsd_init_abi): Set gdbarch_pc_in_sigtramp to
alphanbsd_pc_in_sigtramp.
* config/alpha/tm-alpha.h (IN_SIGTRAMP): Remove.
* config/alpha/tm-alphalinux.h (IN_SIGTRAMP): Remove.