+static void
+m68k_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp,
+ CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ /* Make sure we've initialized the cache. */
+ struct trad_frame_cache *cache =
+ m68k_linux_sigtramp_frame_cache (next_frame, this_cache);
+ trad_frame_get_register (cache, next_frame, regnum, optimizedp, lvalp,
+ addrp, realnump, valuep);
+}
+
+static const struct frame_unwind m68k_linux_sigtramp_frame_unwind =
+{
+ SIGTRAMP_FRAME,
+ m68k_linux_sigtramp_frame_this_id,
+ m68k_linux_sigtramp_frame_prev_register
+};
+
+static const struct frame_unwind *
+m68k_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (m68k_linux_pc_in_sigtramp (pc, name))
+ return &m68k_linux_sigtramp_frame_unwind;
+
+ return NULL;
+}
+
+static void
+m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->jb_pc = M68K_LINUX_JB_PC;
+ tdep->jb_elt_size = M68K_LINUX_JB_ELEMENT_SIZE;
+
+ /* GNU/Linux uses a calling convention that's similar to SVR4. It
+ returns integer values in %d0/%di, pointer values in %a0 and
+ floating values in %fp0, just like SVR4, but uses %a1 to pass the
+ address to store a structure value. It also returns small
+ structures in registers instead of memory. */
+ m68k_svr4_init_abi (info, gdbarch);
+ tdep->struct_value_regnum = M68K_A1_REGNUM;
+ tdep->struct_return = reg_struct_return;
+
+ frame_unwind_append_sniffer (gdbarch, m68k_linux_sigtramp_frame_sniffer);
+
+ /* Shared library handling. */
+
+ /* GNU/Linux uses SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_ilp32_fetch_link_map_offsets);
+
+ /* GNU/Linux uses the dynamic linker included in the GNU C Library. */
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+}
+
+void
+_initialize_m68k_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX,
+ m68k_linux_init_abi);