* regcache.h (struct thread_info): Forward declare.

(struct regcache): New.
	(new_register_cache): Adjust prototype.
	(get_thread_regcache): Declare.
	(free_register_cache): Adjust prototype.
	(registers_to_string, registers_from_string): Ditto.
	(supply_register, supply_register_by_name, collect_register)
	(collect_register_as_string, collect_register_by_name): Ditto.
	* regcache.c (struct inferior_regcache_data): Delete.
	(get_regcache): Rename to ...
	(get_thread_regcache): ... this.  Adjust.  Switch inferior before
	fetching registers.
	(regcache_invalidate_one): Adjust.
	(regcache_invalidate): Fix prototype.
	(new_register_cache): Return the new register cache.
	(free_register_cache): Change prototype.
	(realloc_register_cache): Adjust.
	(registers_to_string): Change prototype to take a regcache.  Adjust.
	(registers_from_string): Ditto.
	(register_data): Ditto.
	(supply_register): Ditto.
	(supply_register_by_name): Ditto.
	(collect_register): Ditto.
	(collect_register_as_string): Ditto.
	(collect_register_by_name): Ditto.
	* server.c (process_serial_event): Adjust.
	* linux-low.h (regset_fill_func, regset_store_func): Change
	prototype.
	(get_pc, set_pc, collect_ptrace_register, supply_ptrace_register):
	Change prototype.
	* linux-low.c (get_stop_pc): Adjust.
	(check_removed_breakpoint): Adjust.
	(linux_wait_for_event): Adjust.
	(linux_resume_one_lwp): Adjust.
	(fetch_register): Add regcache parameter.  Adjust.
	(usr_store_inferior_registers): Ditto.
	(regsets_fetch_inferior_registers): Ditto.
	(regsets_store_inferior_registers): Ditto.
	(linux_fetch_registers, linux_store_registers): Ditto.
	* i387-fp.c (i387_cache_to_fsave): Change prototype to take a
	regcache.  Adjust.
	(i387_fsave_to_cache, i387_cache_to_fxsave, i387_fxsave_to_cache): Ditto.
	* i387-fp.h (i387_cache_to_fsave, i387_fsave_to_cache): Change
	prototype to take a regcache.
	(i387_cache_to_fxsave, i387_fxsave_to_cache): Ditto.
	* remote-utils.c (convert_ascii_to_int, outreg)
	(prepare_resume_reply): Change prototype to take a regcache.
	Adjust.
	* target.h (struct target_ops) <fetch_registers, store_registers>:
	Change prototype to take a regcache.
	(fetch_inferior_registers, store_inferior_registers): Change
	prototype to take a regcache.  Adjust.
	* proc-service.c (ps_lgetregs): Adjust.
	* linux-x86-low.c (x86_fill_gregset, x86_store_gregset)
	(x86_fill_fpregset, x86_store_fpregset, x86_fill_fpxregset)
	(x86_store_fpxregset, x86_get_pc, x86_set_pc): Change prototype to
	take a regcache.  Adjust.
	* linux-arm-low.c (arm_fill_gregset, arm_store_gregset)
	(arm_fill_wmmxregset, arm_store_wmmxregset, arm_fill_vfpregset)
	(arm_store_vfpregset, arm_get_pc, arm_set_pc):
	(arm_breakpoint_at): Change prototype to take a regcache.  Adjust.
	* linux-cris-low.c (cris_get_pc, cris_set_pc)
	(cris_cannot_fetch_register):
	(cris_breakpoint_at): Change prototype to take a regcache.
	Adjust.
	* linux-crisv32-low.c (cris_get_pc, cris_set_pc,
	cris_reinsert_addr, cris_write_data_breakpoint): Change prototype
	to take a regcache.  Adjust.
	(cris_breakpoint_at, cris_insert_point, cris_remove_point):
	Adjust.
	* linux-m32r-low.c (m32r_get_pc, m32r_set_pc): Change prototype to
	take a regcache.  Adjust.
	* linux-m68k-low.c (m68k_fill_gregset, m68k_store_gregset)
	(m68k_fill_fpregset, m68k_store_fpregset, m68k_get_pc,
	(m68k_set_pc): Change prototype to take a regcache.  Adjust.
	* linux-mips-low.c (mips_get_pc):
	(mips_set_pc): Change prototype to take a regcache.  Adjust.
	(mips_reinsert_addr): Adjust.
	(mips_collect_register): Change prototype to take a regcache.
	Adjust.
	(mips_supply_register):
	(mips_collect_register_32bit, mips_supply_register_32bit)
	(mips_fill_gregset, mips_store_gregset, mips_fill_fpregset)
	(mips_store_fpregset): Ditto.
	* linux-ppc-low.c (ppc_supply_ptrace_register, ppc_supply_ptrace_register):
	Ditto.
	(parse_spufs_run): Adjust.
	(ppc_get_pc, ppc_set_pc, ppc_fill_gregset, ppc_fill_vsxregset)
	(ppc_store_vsxregset, ppc_fill_vrregset, ppc_store_vrregset)
	(ppc_fill_evrregset, ppc_store_evrregset): Change prototype to
	take a regcache.  Adjust.
	* linux-s390-low.c (s390_collect_ptrace_register)
	(s390_supply_ptrace_register, s390_fill_gregset, s390_get_pc)
	(s390_set_pc): Change prototype to take a regcache.  Adjust.
	(s390_arch_setup): Adjust.
	* linux-sh-low.c (sh_get_pc, sh_breakpoint_at)
	(sh_fill_gregset): Change prototype to take a regcache.  Adjust.
	* linux-sparc-low.c (sparc_fill_gregset_to_stack)
	(sparc_fill_gregset, sparc_store_gregset_from_stack)
	(sparc_store_gregset, sparc_get_pc): Change prototype to take a
	regcache.  Adjust.
	(sparc_breakpoint_at): Adjust.
	* linux-xtensa-low.c (xtensa_fill_gregset):
	(xtensa_store_gregset):
	(xtensa_fill_xtregset, xtensa_store_xtregset, xtensa_get_pc)
	(xtensa_set_pc): Change prototype to take a regcache.  Adjust.
	* nto-low.c (nto_fetch_registers, nto_store_registers): Change
	prototype to take a regcache.  Adjust.
	* win32-arm-low.c (arm_fetch_inferior_register)
	(arm_store_inferior_register): Change prototype to take a
	regcache.  Adjust.
	* win32-i386-low.c (i386_fetch_inferior_register)
	(i386_store_inferior_register): Change prototype to take a
	regcache.  Adjust.
	* win32-low.c (child_fetch_inferior_registers)
	(child_store_inferior_registers): Change prototype to take a
	regcache.  Adjust.
	(win32_wait): Adjust.
	(win32_fetch_inferior_registers): Change prototype to take a
	regcache.  Adjust.
	(win32_store_inferior_registers): Adjust.
	* win32-low.h (struct win32_target_ops) <fetch_inferior_register,
	store_inferior_register>: Change prototype to take a regcache.

gdb/gdbserver/linux-sparc-low.c

@@ -113,7 +113,7 @@ sparc_cannot_fetch_register (int regno)
 }
 
 static void
-sparc_fill_gregset_to_stack (const void *buf)
+sparc_fill_gregset_to_stack (struct regcache *regcache, const void *buf)
 {
   int i;
   CORE_ADDR addr = 0;
@@ -128,14 +128,14 @@ sparc_fill_gregset_to_stack (const void *buf)
 
   for (i = l0_regno; i <= i7_regno; i++)
     {
-      collect_register (i, tmp_reg_buf);
+      collect_register (regcache, i, tmp_reg_buf);
       (*the_target->write_memory) (addr, tmp_reg_buf, sizeof(tmp_reg_buf));
       addr += sizeof(tmp_reg_buf);
     }
 }
 
 static void
-sparc_fill_gregset (void *buf)
+sparc_fill_gregset (struct regcache *regcache, void *buf)
 {
   int i;
   int range;
@@ -143,25 +143,25 @@ sparc_fill_gregset (void *buf)
   for (range = 0; range < N_GREGS_RANGES; range++)
     for (i = gregs_ranges[range].regno_start; i <= gregs_ranges[range].regno_end; i++)
       if (sparc_regmap[i] != -1)
-	collect_register (i, ((char *) buf) + sparc_regmap[i]);
+	collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
 
-  sparc_fill_gregset_to_stack (buf);
+  sparc_fill_gregset_to_stack (regcache, buf);
 }
 
 static void
-sparc_fill_fpregset (void *buf)
+sparc_fill_fpregset (struct regcache *regcache, void *buf)
 {
   int i;
   int range;
 
   for (range = 0; range < N_FPREGS_RANGES; range++)
     for (i = fpregs_ranges[range].regno_start; i <= fpregs_ranges[range].regno_end; i++)
-      collect_register (i, ((char *) buf) + sparc_regmap[i]);
+      collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
 
 }
 
 static void
-sparc_store_gregset_from_stack (const void *buf)
+sparc_store_gregset_from_stack (struct regcache *regcache, const void *buf)
 {
   int i;
   CORE_ADDR addr = 0;
@@ -177,13 +177,13 @@ sparc_store_gregset_from_stack (const void *buf)
   for (i = l0_regno; i <= i7_regno; i++)
     {
       (*the_target->read_memory) (addr, tmp_reg_buf, sizeof(tmp_reg_buf));
-      supply_register (i, tmp_reg_buf);
+      supply_register (regcache, i, tmp_reg_buf);
       addr += sizeof(tmp_reg_buf);
     }
 }
 
 static void
-sparc_store_gregset (const void *buf)
+sparc_store_gregset (struct regcache *regcache, const void *buf)
 {
   int i;
   char zerobuf[8];
@@ -194,31 +194,33 @@ sparc_store_gregset (const void *buf)
   for (range = 0; range < N_GREGS_RANGES; range++)
     for (i = gregs_ranges[range].regno_start; i <= gregs_ranges[range].regno_end; i++)
       if (sparc_regmap[i] != -1)
-	supply_register (i, ((char *) buf) + sparc_regmap[i]);
+	supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
       else
-	supply_register (i, zerobuf);
+	supply_register (regcache, i, zerobuf);
 
-  sparc_store_gregset_from_stack (buf);
+  sparc_store_gregset_from_stack (regcache, buf);
 }
 
 static void
-sparc_store_fpregset (const void *buf)
+sparc_store_fpregset (struct regcache *regcache, const void *buf)
 {
   int i;
   int range;
 
   for (range = 0; range < N_FPREGS_RANGES; range++)
-    for (i = fpregs_ranges[range].regno_start; i <= fpregs_ranges[range].regno_end; i++)
-      supply_register (i, ((char *) buf) + sparc_regmap[i]);
+    for (i = fpregs_ranges[range].regno_start;
+	 i <= fpregs_ranges[range].regno_end;
+	 i++)
+      supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
 }
 
 extern int debug_threads;
 
 static CORE_ADDR
-sparc_get_pc ()
+sparc_get_pc (struct regcache *regcache)
 {
-  CORE_ADDR pc;
-  collect_register_by_name ("pc", &pc);
+  unsigned long pc;
+  collect_register_by_name (regcache, "pc", &pc);
   if (debug_threads)
     fprintf (stderr, "stop pc is %08lx\n", pc);
   return pc;
@@ -247,11 +249,12 @@ sparc_breakpoint_at (CORE_ADDR where)
    is outside of the function.  So rather than importing software single-step,
    we can just run until exit.  */
 static CORE_ADDR
-sparc_reinsert_addr ()
+sparc_reinsert_addr (void)
 {
+  struct regcache *regcache = get_thread_regcache (current_inferior, 1);
   CORE_ADDR lr;
   /* O7 is the equivalent to the 'lr' of other archs.  */
-  collect_register_by_name ("o7", &lr);
+  collect_register_by_name (regcache, "o7", &lr);
   return lr;
 }