GDB 7.6.50

gdb/sparc-ravenscar-thread.c

 /* Ravenscar SPARC target support.
 
-   Copyright 2004, 2010-2012 Free Software Foundation, Inc.
+   Copyright (C) 2004-2013 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
 #include "gdbcore.h"
 #include "regcache.h"
 #include "sparc-tdep.h"
 #include "inferior.h"
 #include "ravenscar-thread.h"
+#include "sparc-ravenscar-thread.h"
 
-static struct ravenscar_arch_ops ravenscar_sparc_ops;
-
-static void ravenscar_sparc_fetch_registers (struct regcache *regcache,
+static void sparc_ravenscar_fetch_registers (struct regcache *regcache,
                                              int regnum);
-static void ravenscar_sparc_store_registers (struct regcache *regcache,
+static void sparc_ravenscar_store_registers (struct regcache *regcache,
                                              int regnum);
-static void ravenscar_sparc_prepare_to_store (struct regcache *regcache);
+static void sparc_ravenscar_prepare_to_store (struct regcache *regcache);
 
 /* Register offsets from a referenced address (exempli gratia the
    Thread_Descriptor).  The referenced address depends on the register
    number.  The Thread_Descriptor layout and the stack layout are documented
    in the GNAT sources, in sparc-bb.h.  */
 
 static const int sparc_register_offsets[] =
 {
   /* G0 - G7 */
   -1,   0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
@@ skipping 14 matching lines @@
 
 /* supply register REGNUM, which has been saved on REGISTER_ADDR, to the
    regcache.  */
 
 static void
 supply_register_at_address (struct regcache *regcache, int regnum,
                             CORE_ADDR register_addr)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   int buf_size = register_size (gdbarch, regnum);
-  char *buf;
+  gdb_byte *buf;
 
-  buf = (char *) alloca (buf_size);
+  buf = alloca (buf_size);
   read_memory (register_addr, buf, buf_size);
   regcache_raw_supply (regcache, regnum, buf);
 }
 
 /* Return true if, for a non-running thread, REGNUM has been saved on the
    stack.  */
 
 static int
 register_on_stack_p (int regnum)
 {
@@ skipping 14 matching lines @@
     || (regnum == SPARC32_WIM_REGNUM)
     || (regnum == SPARC32_FSR_REGNUM)
     || (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F0_REGNUM + 31)
     || (regnum == SPARC32_PC_REGNUM);
 }
 
 /* to_fetch_registers when inferior_ptid is different from the running
    thread.  */
 
 static void
-ravenscar_sparc_fetch_registers (struct regcache *regcache, int regnum)
+sparc_ravenscar_fetch_registers (struct regcache *regcache, int regnum)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   const int sp_regnum = gdbarch_sp_regnum (gdbarch);
   const int num_regs = gdbarch_num_regs (gdbarch);
   int current_regnum;
   CORE_ADDR current_address;
   CORE_ADDR thread_descriptor_address;
   ULONGEST stack_address;
 
+  /* The tid is the thread_id field, which is a pointer to the thread.  */
   thread_descriptor_address = (CORE_ADDR) ptid_get_tid (inferior_ptid);
+
+  /* Read the saved SP in the context buffer.  */
   current_address = thread_descriptor_address
     + sparc_register_offsets [sp_regnum];
   supply_register_at_address (regcache, sp_regnum, current_address);
   regcache_cooked_read_unsigned (regcache, sp_regnum, &stack_address);
 
+  /* Read registers.  */
   for (current_regnum = 0; current_regnum < num_regs; current_regnum ++)
     {
       if (register_in_thread_descriptor_p (current_regnum))
         {
           current_address = thread_descriptor_address
             + sparc_register_offsets [current_regnum];
           supply_register_at_address (regcache, current_regnum,
                                       current_address);
         }
       else if (register_on_stack_p (current_regnum))
         {
           current_address = stack_address
             + sparc_register_offsets [current_regnum];
           supply_register_at_address (regcache, current_regnum,
                                       current_address);
         }
     }
 }
 
 /* to_prepare_to_store when inferior_ptid is different from the running
    thread.  */
 
 static void
-ravenscar_sparc_prepare_to_store (struct regcache *regcache)
+sparc_ravenscar_prepare_to_store (struct regcache *regcache)
 {
   /* Nothing to do.  */
 }
 
 /* to_store_registers when inferior_ptid is different from the running
    thread.  */
 
 static void
-ravenscar_sparc_store_registers (struct regcache *regcache, int regnum)
+sparc_ravenscar_store_registers (struct regcache *regcache, int regnum)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
   int buf_size = register_size (gdbarch, regnum);
-  char buf [buf_size];
+  gdb_byte buf[buf_size];
   ULONGEST register_address;
 
   if (register_in_thread_descriptor_p (regnum))
     register_address =
       ptid_get_tid (inferior_ptid) + sparc_register_offsets [regnum];
   else if (register_on_stack_p (regnum))
     {
       regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM,
                                      &register_address);
       register_address += sparc_register_offsets [regnum];
     }
   else
     return;
 
   regcache_raw_collect (regcache, regnum, buf);
   write_memory (register_address,
                 buf,
                 buf_size);
 }
 
-/* Provide a prototype to silence -Wmissing-prototypes.  */
-extern void _initialize_ravenscar_sparc (void);
+static struct ravenscar_arch_ops sparc_ravenscar_ops =
+{
+  sparc_ravenscar_fetch_registers,
+  sparc_ravenscar_store_registers,
+  sparc_ravenscar_prepare_to_store
+};
+
+/* Register ravenscar_arch_ops in GDBARCH.  */
 
 void
-_initialize_ravenscar_sparc (void)
+register_sparc_ravenscar_ops (struct gdbarch *gdbarch)
 {
-  ravenscar_sparc_ops.to_fetch_registers = ravenscar_sparc_fetch_registers;
-  ravenscar_sparc_ops.to_store_registers = ravenscar_sparc_store_registers;
-  ravenscar_sparc_ops.to_prepare_to_store = ravenscar_sparc_prepare_to_store;
-  ravenscar_register_arch_ops (&ravenscar_sparc_ops);
+  set_gdbarch_ravenscar_ops (gdbarch, &sparc_ravenscar_ops);
 }