X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Falpha-tdep.c;h=795f0367525a8febd7263eb5caa99d9c27faa81a;hb=28ce7b07473c33f2e4e380a861973d68ffe8017f;hp=ebaa1dd1f502234f5021741e389b70f497b9a822;hpb=0e9f083f4cb94a9dc861f38ba151aac06efce2b8;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index ebaa1dd1f5..795f036752 100644
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for the ALPHA architecture, for GDB, the GNU Debugger.
 
-   Copyright (C) 1993-2013 Free Software Foundation, Inc.
+   Copyright (C) 1993-2019 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -18,7 +18,6 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include "doublest.h"
 #include "frame.h"
 #include "frame-unwind.h"
 #include "frame-base.h"
@@ -31,7 +30,6 @@
 #include "dis-asm.h"
 #include "symfile.h"
 #include "objfiles.h"
-#include <string.h>
 #include "linespec.h"
 #include "regcache.h"
 #include "reggroups.h"
@@ -44,6 +42,7 @@
 #include "elf-bfd.h"
 
 #include "alpha-tdep.h"
+#include <algorithm>
 
 /* Instruction decoding.  The notations for registers, immediates and
    opcodes are the same as the one used in Compaq's Alpha architecture
@@ -186,7 +185,8 @@ static void
 alpha_lds (struct gdbarch *gdbarch, void *out, const void *in)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  ULONGEST mem     = extract_unsigned_integer (in, 4, byte_order);
+  ULONGEST mem
+    = extract_unsigned_integer ((const gdb_byte *) in, 4, byte_order);
   ULONGEST frac    = (mem >>  0) & 0x7fffff;
   ULONGEST sign    = (mem >> 31) & 1;
   ULONGEST exp_msb = (mem >> 30) & 1;
@@ -206,7 +206,7 @@ alpha_lds (struct gdbarch *gdbarch, void *out, const void *in)
     }
 
   reg = (sign << 63) | (exp << 52) | (frac << 29);
-  store_unsigned_integer (out, 8, byte_order, reg);
+  store_unsigned_integer ((gdb_byte *) out, 8, byte_order, reg);
 }
 
 /* Similarly, this represents exactly the conversion performed by
@@ -218,15 +218,15 @@ alpha_sts (struct gdbarch *gdbarch, void *out, const void *in)
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   ULONGEST reg, mem;
 
-  reg = extract_unsigned_integer (in, 8, byte_order);
+  reg = extract_unsigned_integer ((const gdb_byte *) in, 8, byte_order);
   mem = ((reg >> 32) & 0xc0000000) | ((reg >> 29) & 0x3fffffff);
-  store_unsigned_integer (out, 4, byte_order, mem);
+  store_unsigned_integer ((gdb_byte *) out, 4, byte_order, mem);
 }
 
 /* The alpha needs a conversion between register and memory format if the
    register is a floating point register and memory format is float, as the
    register format must be double or memory format is an integer with 4
-   bytes or less, as the representation of integers in floating point
+   bytes, as the representation of integers in floating point
    registers is different.  */
 
 static int
@@ -234,7 +234,7 @@ alpha_convert_register_p (struct gdbarch *gdbarch, int regno,
 			  struct type *type)
 {
   return (regno >= ALPHA_FP0_REGNUM && regno < ALPHA_FP0_REGNUM + 31
-	  && TYPE_LENGTH (type) != 8);
+	  && TYPE_LENGTH (type) == 4);
 }
 
 static int
@@ -243,38 +243,38 @@ alpha_register_to_value (struct frame_info *frame, int regnum,
 			int *optimizedp, int *unavailablep)
 {
   struct gdbarch *gdbarch = get_frame_arch (frame);
-  gdb_byte in[MAX_REGISTER_SIZE];
+  struct value *value = get_frame_register_value (frame, regnum);
 
-  /* Convert to TYPE.  */
-  if (!get_frame_register_bytes (frame, regnum, 0,
-				 register_size (gdbarch, regnum),
-				 in, optimizedp, unavailablep))
-    return 0;
+  gdb_assert (value != NULL);
+  *optimizedp = value_optimized_out (value);
+  *unavailablep = !value_entirely_available (value);
 
-  if (TYPE_LENGTH (valtype) == 4)
+  if (*optimizedp || *unavailablep)
     {
-      alpha_sts (gdbarch, out, in);
-      *optimizedp = *unavailablep = 0;
-      return 1;
+      release_value (value);
+      return 0;
     }
 
-  error (_("Cannot retrieve value from floating point register"));
+  /* Convert to VALTYPE.  */
+
+  gdb_assert (TYPE_LENGTH (valtype) == 4);
+  alpha_sts (gdbarch, out, value_contents_all (value));
+
+  release_value (value);
+  return 1;
 }
 
 static void
 alpha_value_to_register (struct frame_info *frame, int regnum,
 			 struct type *valtype, const gdb_byte *in)
 {
-  gdb_byte out[MAX_REGISTER_SIZE];
+  gdb_byte out[ALPHA_REGISTER_SIZE];
+
+  gdb_assert (TYPE_LENGTH (valtype) == 4);
+  gdb_assert (register_size (get_frame_arch (frame), regnum)
+	      <= ALPHA_REGISTER_SIZE);
+  alpha_lds (get_frame_arch (frame), out, in);
 
-  switch (TYPE_LENGTH (valtype))
-    {
-    case 4:
-      alpha_lds (get_frame_arch (frame), out, in);
-      break;
-    default:
-      error (_("Cannot store value in floating point register"));
-    }
   put_frame_register (frame, regnum, out);
 }
 
@@ -295,19 +295,19 @@ static CORE_ADDR
 alpha_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
 		       struct regcache *regcache, CORE_ADDR bp_addr,
 		       int nargs, struct value **args, CORE_ADDR sp,
-		       int struct_return, CORE_ADDR struct_addr)
+		       function_call_return_method return_method,
+		       CORE_ADDR struct_addr)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   int i;
-  int accumulate_size = struct_return ? 8 : 0;
+  int accumulate_size = (return_method == return_method_struct) ? 8 : 0;
   struct alpha_arg
     {
       const gdb_byte *contents;
       int len;
       int offset;
     };
-  struct alpha_arg *alpha_args
-    = (struct alpha_arg *) alloca (nargs * sizeof (struct alpha_arg));
+  struct alpha_arg *alpha_args = XALLOCAVEC (struct alpha_arg, nargs);
   struct alpha_arg *m_arg;
   gdb_byte arg_reg_buffer[ALPHA_REGISTER_SIZE * ALPHA_NUM_ARG_REGS];
   int required_arg_regs;
@@ -447,17 +447,17 @@ alpha_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
       /* Everything else goes to the stack.  */
       write_memory (sp + offset - sizeof(arg_reg_buffer), contents, len);
     }
-  if (struct_return)
+  if (return_method == return_method_struct)
     store_unsigned_integer (arg_reg_buffer, ALPHA_REGISTER_SIZE,
 			    byte_order, struct_addr);
 
   /* Load the argument registers.  */
   for (i = 0; i < required_arg_regs; i++)
     {
-      regcache_cooked_write (regcache, ALPHA_A0_REGNUM + i,
-			     arg_reg_buffer + i*ALPHA_REGISTER_SIZE);
-      regcache_cooked_write (regcache, ALPHA_FPA0_REGNUM + i,
-			     arg_reg_buffer + i*ALPHA_REGISTER_SIZE);
+      regcache->cooked_write (ALPHA_A0_REGNUM + i,
+			      arg_reg_buffer + i * ALPHA_REGISTER_SIZE);
+      regcache->cooked_write (ALPHA_FPA0_REGNUM + i,
+			      arg_reg_buffer + i * ALPHA_REGISTER_SIZE);
     }
 
   /* Finally, update the stack pointer.  */
@@ -473,7 +473,7 @@ static void
 alpha_extract_return_value (struct type *valtype, struct regcache *regcache,
 			    gdb_byte *valbuf)
 {
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  struct gdbarch *gdbarch = regcache->arch ();
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   gdb_byte raw_buffer[ALPHA_REGISTER_SIZE];
   ULONGEST l;
@@ -484,12 +484,12 @@ alpha_extract_return_value (struct type *valtype, struct regcache *regcache,
       switch (TYPE_LENGTH (valtype))
 	{
 	case 4:
-	  regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, raw_buffer);
+	  regcache->cooked_read (ALPHA_FP0_REGNUM, raw_buffer);
 	  alpha_sts (gdbarch, valbuf, raw_buffer);
 	  break;
 
 	case 8:
-	  regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_read (ALPHA_FP0_REGNUM, valbuf);
 	  break;
 
 	case 16:
@@ -508,12 +508,12 @@ alpha_extract_return_value (struct type *valtype, struct regcache *regcache,
 	{
 	case 8:
 	  /* ??? This isn't correct wrt the ABI, but it's what GCC does.  */
-	  regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_read (ALPHA_FP0_REGNUM, valbuf);
 	  break;
 
 	case 16:
-	  regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, valbuf);
-	  regcache_cooked_read (regcache, ALPHA_FP0_REGNUM + 1, valbuf + 8);
+	  regcache->cooked_read (ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_read (ALPHA_FP0_REGNUM + 1, valbuf + 8);
 	  break;
 
 	case 32:
@@ -542,7 +542,7 @@ static void
 alpha_store_return_value (struct type *valtype, struct regcache *regcache,
 			  const gdb_byte *valbuf)
 {
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  struct gdbarch *gdbarch = regcache->arch ();
   gdb_byte raw_buffer[ALPHA_REGISTER_SIZE];
   ULONGEST l;
 
@@ -553,11 +553,11 @@ alpha_store_return_value (struct type *valtype, struct regcache *regcache,
 	{
 	case 4:
 	  alpha_lds (gdbarch, raw_buffer, valbuf);
-	  regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, raw_buffer);
+	  regcache->cooked_write (ALPHA_FP0_REGNUM, raw_buffer);
 	  break;
 
 	case 8:
-	  regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_write (ALPHA_FP0_REGNUM, valbuf);
 	  break;
 
 	case 16:
@@ -577,12 +577,12 @@ alpha_store_return_value (struct type *valtype, struct regcache *regcache,
 	{
 	case 8:
 	  /* ??? This isn't correct wrt the ABI, but it's what GCC does.  */
-	  regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_write (ALPHA_FP0_REGNUM, valbuf);
 	  break;
 
 	case 16:
-	  regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, valbuf);
-	  regcache_cooked_write (regcache, ALPHA_FP0_REGNUM + 1, valbuf + 8);
+	  regcache->cooked_write (ALPHA_FP0_REGNUM, valbuf);
+	  regcache->cooked_write (ALPHA_FP0_REGNUM + 1, valbuf + 8);
 	  break;
 
 	case 32:
@@ -645,14 +645,10 @@ alpha_return_in_memory_always (struct type *type)
   return 1;
 }
 
-static const gdb_byte *
-alpha_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, int *len)
-{
-  static const gdb_byte break_insn[] = { 0x80, 0, 0, 0 }; /* call_pal bpt */
 
-  *len = sizeof(break_insn);
-  return break_insn;
-}
+constexpr gdb_byte alpha_break_insn[] = { 0x80, 0, 0, 0 }; /* call_pal bpt */
+
+typedef BP_MANIPULATION (alpha_break_insn) alpha_breakpoint;
 
 
 /* This returns the PC of the first insn after the prologue.
@@ -683,11 +679,11 @@ alpha_read_insn (struct gdbarch *gdbarch, CORE_ADDR pc)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   gdb_byte buf[ALPHA_INSN_SIZE];
-  int status;
+  int res;
 
-  status = target_read_memory (pc, buf, sizeof (buf));
-  if (status)
-    memory_error (status, pc);
+  res = target_read_memory (pc, buf, sizeof (buf));
+  if (res != 0)
+    memory_error (TARGET_XFER_E_IO, pc);
   return extract_unsigned_integer (buf, sizeof (buf), byte_order);
 }
 
@@ -722,7 +718,7 @@ alpha_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
 
   post_prologue_pc = alpha_after_prologue (pc);
   if (post_prologue_pc != 0)
-    return max (pc, post_prologue_pc);
+    return std::max (pc, post_prologue_pc);
 
   /* Can't determine prologue from the symbol table, need to examine
      instructions.  */
@@ -769,13 +765,10 @@ static const int stq_c_opcode = 0x2f;
    is found, attempt to step through it.  A breakpoint is placed at the end of 
    the sequence.  */
 
-static int 
-alpha_deal_with_atomic_sequence (struct frame_info *frame)
+static std::vector<CORE_ADDR>
+alpha_deal_with_atomic_sequence (struct gdbarch *gdbarch, CORE_ADDR pc)
 {
-  struct gdbarch *gdbarch = get_frame_arch (frame);
-  struct address_space *aspace = get_frame_address_space (frame);
-  CORE_ADDR pc = get_frame_pc (frame);
-  CORE_ADDR breaks[2] = {-1, -1};
+  CORE_ADDR breaks[2] = {CORE_ADDR_MAX, CORE_ADDR_MAX};
   CORE_ADDR loc = pc;
   CORE_ADDR closing_insn; /* Instruction that closes the atomic sequence.  */
   unsigned int insn = alpha_read_insn (gdbarch, loc);
@@ -788,7 +781,7 @@ alpha_deal_with_atomic_sequence (struct frame_info *frame)
   /* Assume all atomic sequences start with a LDL_L/LDQ_L instruction.  */
   if (INSN_OPCODE (insn) != ldl_l_opcode
       && INSN_OPCODE (insn) != ldq_l_opcode)
-    return 0;
+    return {};
 
   /* Assume that no atomic sequence is longer than "atomic_sequence_length" 
      instructions.  */
@@ -807,8 +800,8 @@ alpha_deal_with_atomic_sequence (struct frame_info *frame)
 	  immediate = (immediate ^ 0x400000) - 0x400000;
 
 	  if (bc_insn_count >= 1)
-	    return 0; /* More than one branch found, fallback 
-			 to the standard single-step code.  */
+	    return {}; /* More than one branch found, fallback
+			  to the standard single-step code.  */
 
 	  breaks[1] = loc + ALPHA_INSN_SIZE + immediate;
 
@@ -824,7 +817,7 @@ alpha_deal_with_atomic_sequence (struct frame_info *frame)
   /* Assume that the atomic sequence ends with a STL_C/STQ_C instruction.  */
   if (INSN_OPCODE (insn) != stl_c_opcode
       && INSN_OPCODE (insn) != stq_c_opcode)
-    return 0;
+    return {};
 
   closing_insn = loc;
   loc += ALPHA_INSN_SIZE;
@@ -839,11 +832,12 @@ alpha_deal_with_atomic_sequence (struct frame_info *frame)
 	  || (breaks[1] >= pc && breaks[1] <= closing_insn)))
     last_breakpoint = 0;
 
-  /* Effectively inserts the breakpoints.  */
+  std::vector<CORE_ADDR> next_pcs;
+
   for (index = 0; index <= last_breakpoint; index++)
-    insert_single_step_breakpoint (gdbarch, aspace, breaks[index]);
+    next_pcs.push_back (breaks[index]);
 
-  return 1;
+  return next_pcs;
 }
 
 
@@ -891,7 +885,7 @@ alpha_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
   struct gdbarch_tdep *tdep;
 
   if (*this_prologue_cache)
-    return *this_prologue_cache;
+    return (struct alpha_sigtramp_unwind_cache *) *this_prologue_cache;
 
   info = FRAME_OBSTACK_ZALLOC (struct alpha_sigtramp_unwind_cache);
   *this_prologue_cache = info;
@@ -1000,11 +994,11 @@ alpha_sigtramp_frame_sniffer (const struct frame_unwind *self,
   const char *name;
 
   /* NOTE: cagney/2004-04-30: Do not copy/clone this code.  Instead
-     look at tramp-frame.h and other simplier per-architecture
+     look at tramp-frame.h and other simpler per-architecture
      sigtramp unwinders.  */
 
   /* We shouldn't even bother to try if the OSABI didn't register a
-     sigcontext_addr handler or pc_in_sigtramp hander.  */
+     sigcontext_addr handler or pc_in_sigtramp handler.  */
   if (gdbarch_tdep (gdbarch)->sigcontext_addr == NULL)
     return 0;
   if (gdbarch_tdep (gdbarch)->pc_in_sigtramp == NULL)
@@ -1241,7 +1235,7 @@ alpha_heuristic_frame_unwind_cache (struct frame_info *this_frame,
   int frame_reg, frame_size, return_reg, reg;
 
   if (*this_prologue_cache)
-    return *this_prologue_cache;
+    return (struct alpha_heuristic_unwind_cache *) *this_prologue_cache;
 
   info = FRAME_OBSTACK_ZALLOC (struct alpha_heuristic_unwind_cache);
   *this_prologue_cache = info;
@@ -1464,33 +1458,11 @@ static const struct frame_base alpha_heuristic_frame_base = {
    callable as an sfunc.  Used by the "set heuristic-fence-post" command.  */
 
 static void
-reinit_frame_cache_sfunc (char *args, int from_tty, struct cmd_list_element *c)
+reinit_frame_cache_sfunc (const char *args,
+			  int from_tty, struct cmd_list_element *c)
 {
   reinit_frame_cache ();
 }
-
-
-/* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
-   dummy frame.  The frame ID's base needs to match the TOS value
-   saved by save_dummy_frame_tos(), and the PC match the dummy frame's
-   breakpoint.  */
-
-static struct frame_id
-alpha_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
-  ULONGEST base;
-  base = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
-  return frame_id_build (base, get_frame_pc (this_frame));
-}
-
-static CORE_ADDR
-alpha_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
-  ULONGEST pc;
-  pc = frame_unwind_register_unsigned (next_frame, ALPHA_PC_REGNUM);
-  return pc;
-}
-
 
 /* Helper routines for alpha*-nat.c files to move register sets to and
    from core files.  The UNIQUE pointer is allowed to be NULL, as most
@@ -1500,75 +1472,73 @@ void
 alpha_supply_int_regs (struct regcache *regcache, int regno,
 		       const void *r0_r30, const void *pc, const void *unique)
 {
-  const gdb_byte *regs = r0_r30;
+  const gdb_byte *regs = (const gdb_byte *) r0_r30;
   int i;
 
   for (i = 0; i < 31; ++i)
     if (regno == i || regno == -1)
-      regcache_raw_supply (regcache, i, regs + i * 8);
+      regcache->raw_supply (i, regs + i * 8);
 
   if (regno == ALPHA_ZERO_REGNUM || regno == -1)
     {
       const gdb_byte zero[8] = { 0 };
 
-      regcache_raw_supply (regcache, ALPHA_ZERO_REGNUM, zero);
+      regcache->raw_supply (ALPHA_ZERO_REGNUM, zero);
     }
 
   if (regno == ALPHA_PC_REGNUM || regno == -1)
-    regcache_raw_supply (regcache, ALPHA_PC_REGNUM, pc);
+    regcache->raw_supply (ALPHA_PC_REGNUM, pc);
 
   if (regno == ALPHA_UNIQUE_REGNUM || regno == -1)
-    regcache_raw_supply (regcache, ALPHA_UNIQUE_REGNUM, unique);
+    regcache->raw_supply (ALPHA_UNIQUE_REGNUM, unique);
 }
 
 void
 alpha_fill_int_regs (const struct regcache *regcache,
 		     int regno, void *r0_r30, void *pc, void *unique)
 {
-  gdb_byte *regs = r0_r30;
+  gdb_byte *regs = (gdb_byte *) r0_r30;
   int i;
 
   for (i = 0; i < 31; ++i)
     if (regno == i || regno == -1)
-      regcache_raw_collect (regcache, i, regs + i * 8);
+      regcache->raw_collect (i, regs + i * 8);
 
   if (regno == ALPHA_PC_REGNUM || regno == -1)
-    regcache_raw_collect (regcache, ALPHA_PC_REGNUM, pc);
+    regcache->raw_collect (ALPHA_PC_REGNUM, pc);
 
   if (unique && (regno == ALPHA_UNIQUE_REGNUM || regno == -1))
-    regcache_raw_collect (regcache, ALPHA_UNIQUE_REGNUM, unique);
+    regcache->raw_collect (ALPHA_UNIQUE_REGNUM, unique);
 }
 
 void
 alpha_supply_fp_regs (struct regcache *regcache, int regno,
 		      const void *f0_f30, const void *fpcr)
 {
-  const gdb_byte *regs = f0_f30;
+  const gdb_byte *regs = (const gdb_byte *) f0_f30;
   int i;
 
   for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; ++i)
     if (regno == i || regno == -1)
-      regcache_raw_supply (regcache, i,
-			   regs + (i - ALPHA_FP0_REGNUM) * 8);
+      regcache->raw_supply (i, regs + (i - ALPHA_FP0_REGNUM) * 8);
 
   if (regno == ALPHA_FPCR_REGNUM || regno == -1)
-    regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, fpcr);
+    regcache->raw_supply (ALPHA_FPCR_REGNUM, fpcr);
 }
 
 void
 alpha_fill_fp_regs (const struct regcache *regcache,
 		    int regno, void *f0_f30, void *fpcr)
 {
-  gdb_byte *regs = f0_f30;
+  gdb_byte *regs = (gdb_byte *) f0_f30;
   int i;
 
   for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; ++i)
     if (regno == i || regno == -1)
-      regcache_raw_collect (regcache, i,
-			    regs + (i - ALPHA_FP0_REGNUM) * 8);
+      regcache->raw_collect (i, regs + (i - ALPHA_FP0_REGNUM) * 8);
 
   if (regno == ALPHA_FPCR_REGNUM || regno == -1)
-    regcache_raw_collect (regcache, ALPHA_FPCR_REGNUM, fpcr);
+    regcache->raw_collect (ALPHA_FPCR_REGNUM, fpcr);
 }
 
 
@@ -1602,9 +1572,9 @@ fp_register_sign_bit (LONGEST reg)
    the target of the coming instruction and breakpoint it.  */
 
 static CORE_ADDR
-alpha_next_pc (struct frame_info *frame, CORE_ADDR pc)
+alpha_next_pc (struct regcache *regcache, CORE_ADDR pc)
 {
-  struct gdbarch *gdbarch = get_frame_arch (frame);
+  struct gdbarch *gdbarch = regcache->arch ();
   unsigned int insn;
   unsigned int op;
   int regno;
@@ -1620,7 +1590,7 @@ alpha_next_pc (struct frame_info *frame, CORE_ADDR pc)
     {
       /* Jump format: target PC is:
 	 RB & ~3  */
-      return (get_frame_register_unsigned (frame, (insn >> 16) & 0x1f) & ~3);
+      return (regcache_raw_get_unsigned (regcache, (insn >> 16) & 0x1f) & ~3);
     }
 
   if ((op & 0x30) == 0x30)
@@ -1651,7 +1621,7 @@ alpha_next_pc (struct frame_info *frame, CORE_ADDR pc)
             regno += gdbarch_fp0_regnum (gdbarch);
 	}
       
-      rav = get_frame_register_signed (frame, regno);
+      rav = regcache_raw_get_signed (regcache, regno);
 
       switch (op)
 	{
@@ -1722,18 +1692,20 @@ alpha_next_pc (struct frame_info *frame, CORE_ADDR pc)
   return (pc + ALPHA_INSN_SIZE);
 }
 
-int
-alpha_software_single_step (struct frame_info *frame)
+std::vector<CORE_ADDR>
+alpha_software_single_step (struct regcache *regcache)
 {
-  struct gdbarch *gdbarch = get_frame_arch (frame);
-  struct address_space *aspace = get_frame_address_space (frame);
-  CORE_ADDR pc, next_pc;
+  struct gdbarch *gdbarch = regcache->arch ();
 
-  pc = get_frame_pc (frame);
-  next_pc = alpha_next_pc (frame, pc);
+  CORE_ADDR pc = regcache_read_pc (regcache);
 
-  insert_single_step_breakpoint (gdbarch, aspace, next_pc);
-  return 1;
+  std::vector<CORE_ADDR> next_pcs
+    = alpha_deal_with_atomic_sequence (gdbarch, pc);
+  if (!next_pcs.empty ())
+    return next_pcs;
+
+  CORE_ADDR next_pc = alpha_next_pc (regcache, pc);
+  return {next_pc};
 }
 
 
@@ -1750,20 +1722,12 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   struct gdbarch_tdep *tdep;
   struct gdbarch *gdbarch;
 
-  /* Try to determine the ABI of the object we are loading.  */
-  if (info.abfd != NULL && info.osabi == GDB_OSABI_UNKNOWN)
-    {
-      /* If it's an ECOFF file, assume it's OSF/1.  */
-      if (bfd_get_flavour (info.abfd) == bfd_target_ecoff_flavour)
-	info.osabi = GDB_OSABI_OSF1;
-    }
-
   /* Find a candidate among extant architectures.  */
   arches = gdbarch_list_lookup_by_info (arches, &info);
   if (arches != NULL)
     return arches->gdbarch;
 
-  tdep = xmalloc (sizeof (struct gdbarch_tdep));
+  tdep = XCNEW (struct gdbarch_tdep);
   gdbarch = gdbarch_alloc (&info, tdep);
 
   /* Lowest text address.  This is used by heuristic_proc_start()
@@ -1785,6 +1749,8 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_int_bit (gdbarch, 32);
   set_gdbarch_long_bit (gdbarch, 64);
   set_gdbarch_long_long_bit (gdbarch, 64);
+  set_gdbarch_wchar_bit (gdbarch, 64);
+  set_gdbarch_wchar_signed (gdbarch, 0);
   set_gdbarch_float_bit (gdbarch, 32);
   set_gdbarch_double_bit (gdbarch, 64);
   set_gdbarch_long_double_bit (gdbarch, 64);
@@ -1811,9 +1777,6 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   /* Prologue heuristics.  */
   set_gdbarch_skip_prologue (gdbarch, alpha_skip_prologue);
 
-  /* Disassembler.  */
-  set_gdbarch_print_insn (gdbarch, print_insn_alpha);
-
   /* Call info.  */
 
   set_gdbarch_return_value (gdbarch, alpha_return_value);
@@ -1821,21 +1784,18 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   /* Settings for calling functions in the inferior.  */
   set_gdbarch_push_dummy_call (gdbarch, alpha_push_dummy_call);
 
-  /* Methods for saving / extracting a dummy frame's ID.  */
-  set_gdbarch_dummy_id (gdbarch, alpha_dummy_id);
-
-  /* Return the unwound PC value.  */
-  set_gdbarch_unwind_pc (gdbarch, alpha_unwind_pc);
-
   set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
 
-  set_gdbarch_breakpoint_from_pc (gdbarch, alpha_breakpoint_from_pc);
+  set_gdbarch_breakpoint_kind_from_pc (gdbarch,
+				       alpha_breakpoint::kind_from_pc);
+  set_gdbarch_sw_breakpoint_from_kind (gdbarch,
+				       alpha_breakpoint::bp_from_kind);
   set_gdbarch_decr_pc_after_break (gdbarch, ALPHA_INSN_SIZE);
   set_gdbarch_cannot_step_breakpoint (gdbarch, 1);
 
   /* Handles single stepping of atomic sequences.  */
-  set_gdbarch_software_single_step (gdbarch, alpha_deal_with_atomic_sequence);
+  set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
 
   /* Hook in ABI-specific overrides, if they have been registered.  */
   gdbarch_init_osabi (info, gdbarch);
@@ -1861,12 +1821,9 @@ alpha_dwarf2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
 }
 
-extern initialize_file_ftype _initialize_alpha_tdep; /* -Wmissing-prototypes */
-
 void
 _initialize_alpha_tdep (void)
 {
-  struct cmd_list_element *c;
 
   gdbarch_register (bfd_arch_alpha, alpha_gdbarch_init, NULL);