* Makefile.in (m68k-tdep.o, m68klinux-tdep.o): Update

dependencies.
	* m68k-tdep.c (NUM_FREGS): Delete.
	(SIG_PC_FP_OFFSET): Delete.
	(TARGET_M68K): Delete.
	(P_MOVEAL_SP_FP, P_ADDAW_SP, P_ADDAL_SP, P_SUBQW_SP,
	P_SUBQL_SP, P_LEA_SP_SP, P_LEA_PC_A5, P_FMOVEMX_SP,
	P_MOVEL_SP, P_MOVEML_SP): Define.
	(P_MOVL_SP_FP, P_MOVL, P_JSR, P_BSR, P_LEAL, P_MOVML, P_FMOVM,
	P_TRAP): Delete.
        (m68k_register_raw_size): Delete.
	(m68k_register_virtual_size): Delete.
	(m68k_register_type): Renamed from m68k_register_virtual_type and
	add gdbarch argument.
	(m68k_store_struct_return): Delete.
	(m68k_deprecated_extract_return_value): Delete.
	(m68k_deprecated_extract_struct_value_address): Delete.
	(m68k_frame_chain): Delete.
	(m68k_frame_saved_pc): Delete.
	(m68k_fix_call_dummy): Delete.
	(m68k_push_dummy_frame): Delete.
	(m68k_pop_frame): Delete.
	(m68k_extract_return_value): New function.
	(m68k_store_return_value): Rewrite using regcache.
	(m68k_extract_struct_value_address): Rewrite using regcache.
	(m68k_push_dummy_call): New function.
	(struct m68k_frame_cache): Define.
	(m68k_alloc_frame_cache): New function.
	(m68k_analyze_frame_setup): New function.
	(m68k_analyze_register_saves): New function.
	(m68k_analyze_prologue): New function.
	(m68k_skip_prologue): Rewrite using above functions.
	(m68k_unwind_pc): New function.
	(m68k_frame_cache): New function.
	(m68k_frame_this_id): New function.
	(m68k_frame_prev_register): New function.
	(m68k_frame_unwind): New variable.
	(m68k_frame_p): New function.
	(m68k_sigtramp_frame_cache): New function.
	(m68k_sigtramp_frame_this_id): New function.
	(m68k_sigtramp_frame_prev_register): New function.
	(m68k_sigtramp_frame_unwind): New variable.
	(m68k_sigtramp_frame_p): New function.
	(m68k_frame_base_address): New function.
	(m68k_frame_base): New function.
	(m68k_unwind_dummy_id): New function.
	(fill_gregset): Use regcache_collect.
	(fill_fpregset): Likewise.
	(m68k_saved_pc_after_call): Only define if SYSCALL_TRAP is
	defined.
	(m68k_gdbarch_init): Don't define call_dummy_words.  Don't set
	deprecated_init_frame_pc, deprecated_store_struct_return,
	deprecated_extract_return_value, deprecated_store_return_value,
	deprecated_frame_chain, deprecated_frame_saved_pc,
	deprecated_frame_init_saved_regs, deprecated_register_raw_size,
	deprecated_register_virtual_size,
	deprecated_max_register_raw_size,
	deprecated_max_register_virtual_size,
	deprecated_register_virtual_type, deprecated_register_size,
	deprecated_register_byte, deprecated_register_bytes,
	deprecated_fp_regnum, deprecated_use_generic_dummy_frames,
	call_dummy_location, deprecated_call_dummy_breakpoint_offset,
	deprecated_pc_in_call_dummy, deprecated_call_dummy_length,
	deprecated_call_dummy_start_offset, deprecated_call_dummy_words,
	deprecated_sizeof_call_dummy_words, deprecated_fix_call_dummy,
	deprecated_push_dummy_frame, deprecated_pop_frame,
	deprecated_dummy_write_sp.  Set deprecated_saved_pc_after_call
	only if SYSCALL_TRAP is defined.  Set extract_return_value,
	store_return_value, extract_struct_value_address, register_type,
	push_dummy_call, unwind_dummy_id, unwind_pc.  Add two frame unwind
	predicates.
	* m68k-tdep.h (M68K_D1_REGNUM, M68K_NUM_REGS,
	M68K_MAX_REGISTER_SIZE): Define.
	(struct m68k_sigtramp_info): Define.
	(struct gdbarch_tdep): Add get_sigtramp_info.
	* m68klinux-nat.c (fetch_register): Use register_size instead of
	REGISTER_RAW_SIZE.  Don't put assignment in if.
	(store_register): Likewise.
	(fetch_inferior_registers): Likewise.
	(store_inferior_registers): Likewise.
	* m68klinux-tdep.c (m68k_linux_sigtramp_saved_pc): Delete.
	(m68k_linux_frame_saved_pc): Delete.
	(m68k_linux_sigcontext_reg_offset,
	m68k_linux_ucontext_reg_offset): Define.
	(m68k_linux_get_sigtramp_info): New function.
	(m68k_linux_extract_return_value): Rewrite using regcache.
	(m68k_linux_store_return_value): Likewise.
	(m68k_linux_extract_struct_value_address): Likewise.
	(m68k_linux_init_abi): Set get_sigtramp_info in tdep structure.
	Don't set deprecated_frame_saved_pc,
	deprecated_extract_return_value, deprecated_store_return_value,
	deprecated_extract_struct_value_address.  Set
	extract_return_value, store_return_value,
	extract_struct_value_address.

gdb/m68k-tdep.h

@@ -22,6 +22,8 @@
 #ifndef M68K_TDEP_H
 #define M68K_TDEP_H
 
+struct frame_info;
+
 /* Register numbers of various important registers.
    Note that some of these values are "real" register numbers,
    and correspond to the general registers of the machine,
@@ -32,6 +34,7 @@
 enum
 {
   M68K_D0_REGNUM = 0,
+  M68K_D1_REGNUM = 1,
   M68K_A0_REGNUM = 8,
   M68K_A1_REGNUM = 9,
   M68K_FP_REGNUM = 14,		/* Contains address of executing stack frame */
@@ -44,6 +47,20 @@ enum
   M68K_FPI_REGNUM = 28
 };
 
+#define M68K_NUM_REGS (M68K_FPI_REGNUM + 1)
+
+/* Size of the largest register.  */
+#define M68K_MAX_REGISTER_SIZE	12
+
+struct m68k_sigtramp_info
+{
+  /* Address of sigcontext.  */
+  CORE_ADDR sigcontext_addr;
+
+  /* Offset of registers in `struct sigcontext'.  */
+  int *sc_reg_offset;
+};
+
 /* Target-dependent structure in gdbarch.  */
 struct gdbarch_tdep
 {
@@ -52,6 +69,9 @@ struct gdbarch_tdep
   int jb_pc;
   /* The size of each entry in the jump buffer.  */
   size_t jb_elt_size;
+
+  /* Get info about sigtramp.  */
+  struct m68k_sigtramp_info (*get_sigtramp_info) (struct frame_info *);
 };
 
 #endif /* M68K_TDEP_H */