2012-05-07 Chung-Lin Tang <cltang@codesourcery.com>

2012-05-07  Chung-Lin Tang  <cltang@codesourcery.com>

	* sh-linux-tdep.c: Include trad-frame.h and tramp-frame.h.
	(sh_linux_sigtramp_cache): New function.
	(sh_linux_sigreturn_init): New function.
	(sh_linux_rt_sigreturn_init): New function.
	(SH_MOVW,SH_TRAP,SH_OR_R0_R0): New symbols for instruction
	patterns.
	(SH_NR_SIGRETURN,SH_NR_RT_SIGRETURN): New symbols for sigreturn
	syscall codes.
	(sh_linux_sigreturn_tramp_frame): New tramp_frame definition.
	(sh_linux_rt_sigreturn_tramp_frame): Likewise.
	(sh_linux_init_abi): Add init calls to register new tramp_frame
	definitions under 32-bit SH, update comments.