Add support for Score target.

1 files changed, 504 insertions, 0 deletions

diff --git a/opcodes/score-dis.c b/opcodes/score-dis.c
new file mode 100644
index 0000000000..0a4f67c6b3
--- /dev/null
+++ b/opcodes/score-dis.c
@@ -0,0 +1,504 @@
+/* Instruction printing code for Score
+   Copyright 2006 Free Software Foundation, Inc.
+   Contributed by:
+   Mei Ligang (ligang@sunnorth.com.cn)
+   Pei-Lin Tsai (pltsai@sunplus.com)
+
+   This file is part of libopcodes.
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include "sysdep.h"
+#include "dis-asm.h"
+#define DEFINE_TABLE
+#include "score-opc.h"
+#include "opintl.h"
+#include "bfd.h"
+
+/* FIXME: This shouldn't be done here.  */
+#include "elf-bfd.h"
+#include "elf/internal.h"
+#include "elf/score.h"
+
+#ifndef streq
+#define streq(a,b)	(strcmp ((a), (b)) == 0)
+#endif
+
+#ifndef strneq
+#define strneq(a,b,n)	(strncmp ((a), (b), (n)) == 0)
+#endif
+
+#ifndef NUM_ELEM
+#define NUM_ELEM(a)     (sizeof (a) / sizeof (a)[0])
+#endif
+
+typedef struct
+{
+  const char *name;
+  const char *description;
+  const char *reg_names[32];
+} score_regname;
+
+static score_regname regnames[] =
+{
+  {"gcc", "Select register names used by GCC",
+  {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
+   "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20",
+   "r21", "r22", "r23", "r24", "r25", "r26", "r27", "gp", "r29", "r30", "r31"}},
+};
+
+static unsigned int regname_selected = 0;
+
+#define NUM_SCORE_REGNAMES  NUM_ELEM (regnames)
+#define score_regnames      regnames[regname_selected].reg_names
+
+/* Print one instruction from PC on INFO->STREAM.
+   Return the size of the instruction.  */
+static int
+print_insn_score32 (bfd_vma pc, struct disassemble_info *info, long given)
+{
+  struct score_opcode *insn;
+  void *stream = info->stream;
+  fprintf_ftype func = info->fprintf_func;
+
+  for (insn = score_opcodes; insn->assembler; insn++)
+    {
+      if ((insn->mask & 0xffff0000) && (given & insn->mask) == insn->value)
+        {
+          char *c;
+
+          for (c = insn->assembler; *c; c++)
+            {
+              if (*c == '%')
+                {
+                  switch (*++c)
+                    {
+                    case 'j':
+                      {
+                        int target;
+
+                        if (info->flags & INSN_HAS_RELOC)
+                          pc = 0;
+                        target = (pc & 0xfe000000) | (given & 0x01fffffe);
+                        (*info->print_address_func) (target, info);
+                      }
+                      break;
+                    case 'b':
+                      {
+                        /* Sign-extend a 20-bit number.  */
+#define SEXT20(x)       ((((x) & 0xfffff) ^ (~ 0x7ffff)) + 0x80000)
+                        int disp = ((given & 0x01ff8000) >> 5) | (given & 0x3fe);
+                        int target = (pc + SEXT20 (disp));
+
+                        (*info->print_address_func) (target, info);
+                      }
+                      break;
+                    case '0':
+                    case '1':
+                    case '2':
+                    case '3':
+                    case '4':
+                    case '5':
+                    case '6':
+                    case '7':
+                    case '8':
+                    case '9':
+                      {
+                        int bitstart = *c++ - '0';
+                        int bitend = 0;
+
+                        while (*c >= '0' && *c <= '9')
+                          bitstart = (bitstart * 10) + *c++ - '0';
+
+                        switch (*c)
+                          {
+                          case '-':
+                            c++;
+                            while (*c >= '0' && *c <= '9')
+                              bitend = (bitend * 10) + *c++ - '0';
+
+                            if (!bitend)
+                              abort ();
+
+                            switch (*c)
+                              {
+                              case 'r':
+                                {
+                                  long reg;
+
+                                  reg = given >> bitstart;
+                                  reg &= (2 << (bitend - bitstart)) - 1;
+
+                                  func (stream, "%s", score_regnames[reg]);
+                                }
+                                break;
+                              case 'd':
+                                {
+                                  long reg;
+
+                                  reg = given >> bitstart;
+                                  reg &= (2 << (bitend - bitstart)) - 1;
+
+                                  func (stream, "%ld", reg);
+                                }
+                                break;
+                              case 'i':
+                                {
+                                  long reg;
+
+                                  reg = given >> bitstart;
+                                  reg &= (2 << (bitend - bitstart)) - 1;
+                                  reg = ((reg ^ (1 << (bitend - bitstart))) -
+                                        (1 << (bitend - bitstart)));
+
+                                  if (((given & insn->mask) == 0x0c00000a)      /* ldc1  */
+                                      || ((given & insn->mask) == 0x0c000012)   /* ldc2  */
+                                      || ((given & insn->mask) == 0x0c00001c)   /* ldc3  */
+                                      || ((given & insn->mask) == 0x0c00000b)   /* stc1  */
+                                      || ((given & insn->mask) == 0x0c000013)   /* stc2  */
+                                      || ((given & insn->mask) == 0x0c00001b))  /* stc3  */
+                                    reg <<= 2;
+
+                                  func (stream, "%ld", reg);
+                                }
+                                break;
+                              case 'x':
+                                {
+                                  long reg;
+
+                                  reg = given >> bitstart;
+                                  reg &= (2 << (bitend - bitstart)) - 1;
+
+                                  func (stream, "%lx", reg);
+                                }
+                                break;
+                              default:
+                                abort ();
+                              }
+                            break;
+                          case '`':
+                            c++;
+                            if ((given & (1 << bitstart)) == 0)
+                              func (stream, "%c", *c);
+                            break;
+                          case '\'':
+                            c++;
+                            if ((given & (1 << bitstart)) != 0)
+                              func (stream, "%c", *c);
+                            break;
+                          default:
+                            abort ();
+                          }
+                        break;
+
+                    default:
+                        abort ();
+                      }
+                    }
+                }
+              else
+                func (stream, "%c", *c);
+            }
+          return 4;
+        }
+    }
+
+#if (SCORE_SIMULATOR_ACTIVE)
+  func (stream, _("<illegal instruction>"));
+  return 4;
+#endif
+
+  abort ();
+}
+
+static void
+print_insn_parallel_sym (struct disassemble_info *info)
+{
+  void *stream = info->stream;
+  fprintf_ftype func = info->fprintf_func;
+
+  /* 10:       0000            nop!
+     4 space + 1 colon + 1 space + 1 tab + 8 opcode + 2 space + 1 tab.
+     FIXME: the space number is not accurate.  */
+  func (stream, "%s", " ||\n      \t          \t");
+}
+
+/* Print one instruction from PC on INFO->STREAM.
+   Return the size of the instruction.  */
+static int
+print_insn_score16 (bfd_vma pc, struct disassemble_info *info, long given)
+{
+  struct score_opcode *insn;
+  void *stream = info->stream;
+  fprintf_ftype func = info->fprintf_func;
+
+  given &= 0xffff;
+  for (insn = score_opcodes; insn->assembler; insn++)
+    {
+      if (!(insn->mask & 0xffff0000) && (given & insn->mask) == insn->value)
+        {
+          char *c = insn->assembler;
+
+          info->bytes_per_chunk = 2;
+          info->bytes_per_line = 4;
+          given &= 0xffff;
+
+          for (; *c; c++)
+            {
+              if (*c == '%')
+                {
+                  switch (*++c)
+                    {
+
+                    case 'j':
+                      {
+                        int target;
+
+                        if (info->flags & INSN_HAS_RELOC)
+                          pc = 0;
+
+                        target = (pc & 0xfffff000) | (given & 0x00000ffe);
+                        (*info->print_address_func) (target, info);
+                      }
+                      break;
+                    case 'b':
+                      {
+                        /* Sign-extend a 9-bit number.  */
+#define SEXT9(x)           ((((x) & 0x1ff) ^ (~ 0xff)) + 0x100)
+                        int disp = (given & 0xff) << 1;
+                        int target = (pc + SEXT9 (disp));
+
+                        (*info->print_address_func) (target, info);
+                      }
+                      break;
+
+                    case '0':
+                    case '1':
+                    case '2':
+                    case '3':
+                    case '4':
+                    case '5':
+                    case '6':
+                    case '7':
+                    case '8':
+                    case '9':
+                      {
+                        int bitstart = *c++ - '0';
+                        int bitend = 0;
+
+                        while (*c >= '0' && *c <= '9')
+                          bitstart = (bitstart * 10) + *c++ - '0';
+
+                        switch (*c)
+                          {
+                          case '-':
+                            {
+                              long reg;
+
+                              c++;
+                              while (*c >= '0' && *c <= '9')
+                                bitend = (bitend * 10) + *c++ - '0';
+                              if (!bitend)
+                                abort ();
+                              reg = given >> bitstart;
+                              reg &= (2 << (bitend - bitstart)) - 1;
+                              switch (*c)
+                                {
+                                case 'R':
+                                  func (stream, "%s", score_regnames[reg + 16]);
+                                  break;
+                                case 'r':
+                                  func (stream, "%s", score_regnames[reg]);
+                                  break;
+                                case 'd':
+                                  if (*(c + 1) == '\0')
+                                    func (stream, "%ld", reg);
+                                  else
+                                    {
+                                      c++;
+                                      if (*c == '1')
+                                        func (stream, "%ld", reg << 1);
+                                      else if (*c == '2')
+                                        func (stream, "%ld", reg << 2);
+                                    }
+                                  break;
+
+                                case 'x':
+                                  if (*(c + 1) == '\0')
+                                    func (stream, "%lx", reg);
+                                  else
+                                    {
+                                      c++;
+                                      if (*c == '1')
+                                        func (stream, "%lx", reg << 1);
+                                      else if (*c == '2')
+                                        func (stream, "%lx", reg << 2);
+                                    }
+                                  break;
+                                case 'i':
+				  reg = ((reg ^ (1 << bitend)) - (1 << bitend));
+				  func (stream, "%ld", reg);
+                                  break;
+                                default:
+                                  abort ();
+                                }
+                            }
+                            break;
+
+                          case '\'':
+                            c++;
+                            if ((given & (1 << bitstart)) != 0)
+                              func (stream, "%c", *c);
+                            break;
+                          default:
+                            abort ();
+                          }
+                      }
+                      break;
+                    default:
+                      abort ();
+                    }
+                }
+              else
+                func (stream, "%c", *c);
+            }
+
+          return 2;
+        }
+    }
+#if (SCORE_SIMULATOR_ACTIVE)
+  func (stream, _("<illegal instruction>"));
+  return 2;
+#endif
+  /* No match.  */
+  abort ();
+}
+
+/* NOTE: There are no checks in these routines that
+   the relevant number of data bytes exist.  */
+static int
+print_insn (bfd_vma pc, struct disassemble_info *info, bfd_boolean little)
+{
+  unsigned char b[4];
+  long given;
+  long ridparity;
+  int status;
+  bfd_boolean insn_pce_p = FALSE;
+  bfd_boolean insn_16_p = FALSE;
+
+  info->display_endian = little ? BFD_ENDIAN_LITTLE : BFD_ENDIAN_BIG;
+
+  if (pc & 0x2)
+    {
+      info->bytes_per_chunk = 2;
+      status = info->read_memory_func (pc, (bfd_byte *) b, 2, info);
+      b[3] = b[2] = 0;
+      insn_16_p = TRUE;
+    }
+  else
+    {
+      info->bytes_per_chunk = 4;
+      status = info->read_memory_func (pc, (bfd_byte *) & b[0], 4, info);
+      if (status != 0)
+	{
+          info->bytes_per_chunk = 2;
+          status = info->read_memory_func (pc, (bfd_byte *) b, 2, info);
+          b[3] = b[2] = 0;
+          insn_16_p = TRUE;
+	}
+    }
+
+  if (status != 0)
+    {
+      info->memory_error_func (status, pc, info);
+      return -1;
+    }
+
+  if (little)
+    {
+      given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24);
+    }
+  else
+    {
+      given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]);
+    }
+
+  if ((given & 0x80008000) == 0x80008000)
+    {
+      insn_pce_p = FALSE;
+      insn_16_p = FALSE;
+    }
+  else if ((given & 0x8000) == 0x8000)
+    {
+      insn_pce_p = TRUE;
+    }
+  else
+    {
+      insn_16_p = TRUE;
+    }
+
+  /* 16 bit instruction.  */
+  if (insn_16_p)
+    {
+      if (little)
+	{
+          given = b[0] | (b[1] << 8);
+	}
+      else
+	{
+          given = (b[0] << 8) | b[1];
+	}
+
+      status = print_insn_score16 (pc, info, given);
+    }
+  /* pce instruction.  */
+  else if (insn_pce_p)
+    {
+      long other;
+
+      given = (given & 0xFFFF0000) >> 16;
+      other = given & 0xFFFF;
+
+      status = print_insn_score16 (pc, info, given);
+      print_insn_parallel_sym (info);
+      status += print_insn_score16 (pc, info, other);
+      /* disassemble_bytes() will output 4 byte per chunk for pce instructio.  */
+      info->bytes_per_chunk = 4;
+    }
+  /* 32 bit instruction.  */
+  else
+    {
+      /* Get rid of parity.  */
+      ridparity = (given & 0x7FFF);
+      ridparity |= (given & 0x7FFF0000) >> 1;
+      given = ridparity;
+      status = print_insn_score32 (pc, info, given);
+    }
+
+  return status;
+}
+
+int
+print_insn_big_score (bfd_vma pc, struct disassemble_info *info)
+{
+  return print_insn (pc, info, FALSE);
+}
+
+int
+print_insn_little_score (bfd_vma pc, struct disassemble_info *info)
+{
+  return print_insn (pc, info, TRUE);
+}