1 files changed, 193 insertions, 8 deletions

diff --git a/bfd/cpu-sh.c b/bfd/cpu-sh.c
index be359df..98d7288 100644
--- a/bfd/cpu-sh.c
+++ b/bfd/cpu-sh.c
@@ -22,20 +22,22 @@
 #include "bfd.h"
 #include "sysdep.h"
 #include "libbfd.h"
+#include "../opcodes/sh-opc.h"
 
 #define SH_NEXT      &arch_info_struct[0]
 #define SH2_NEXT     &arch_info_struct[1]
 #define SH2E_NEXT    &arch_info_struct[2]
 #define SH_DSP_NEXT  &arch_info_struct[3]
 #define SH3_NEXT     &arch_info_struct[4]
-#define SH3_DSP_NEXT &arch_info_struct[5]
-#define SH3E_NEXT    &arch_info_struct[6]
-#define SH4_NEXT     &arch_info_struct[7]
-#define SH4A_NEXT    &arch_info_struct[8]
-#define SH4AL_DSP_NEXT &arch_info_struct[9]
-#define SH4_NOFPU_NEXT &arch_info_struct[10]
-#define SH4_NOMMU_NOFPU_NEXT &arch_info_struct[11]
-#define SH4A_NOFPU_NEXT &arch_info_struct[12]
+#define SH3_NOMMU_NEXT &arch_info_struct[5]
+#define SH3_DSP_NEXT &arch_info_struct[6]
+#define SH3E_NEXT    &arch_info_struct[7]
+#define SH4_NEXT     &arch_info_struct[8]
+#define SH4A_NEXT    &arch_info_struct[9]
+#define SH4AL_DSP_NEXT &arch_info_struct[10]
+#define SH4_NOFPU_NEXT &arch_info_struct[11]
+#define SH4_NOMMU_NOFPU_NEXT &arch_info_struct[12]
+#define SH4A_NOFPU_NEXT &arch_info_struct[13]
 #define SH64_NEXT    NULL
 
 static const bfd_arch_info_type arch_info_struct[] =
@@ -101,6 +103,20 @@ static const bfd_arch_info_type arch_info_struct[] =
     32,				/* 32 bits in an address */
     8,				/* 8 bits in a byte */
     bfd_arch_sh,
+    bfd_mach_sh3_nommu,
+    "sh",			/* arch_name  */
+    "sh3-nommu",		/* printable name */
+    1,
+    FALSE,			/* not the default */
+    bfd_default_compatible,
+    bfd_default_scan,
+    SH3_NOMMU_NEXT
+  },
+  {
+    32,				/* 32 bits in a word */
+    32,				/* 32 bits in an address */
+    8,				/* 8 bits in a byte */
+    bfd_arch_sh,
     bfd_mach_sh3_dsp,
     "sh",			/* arch_name  */
     "sh3-dsp",			/* printable name */
@@ -239,3 +255,172 @@ const bfd_arch_info_type bfd_sh_arch =
   bfd_default_scan,
   SH_NEXT
 };
+
+
+/* This table defines the mappings from the BFD internal numbering
+   system to the opcodes internal flags system.
+   It is used by the functions defined below.
+   The prototypes for these SH specific functions are found in
+   sh-opc.h .  */
+
+static struct { unsigned long bfd_mach, arch, arch_up; } bfd_to_arch_table[] =
+{
+  { bfd_mach_sh,              arch_sh1,             arch_sh1_up },
+  { bfd_mach_sh2,             arch_sh2,             arch_sh2_up },
+  { bfd_mach_sh2e,            arch_sh2e,            arch_sh2e_up },
+  { bfd_mach_sh_dsp,          arch_sh_dsp,          arch_sh_dsp_up },
+  { bfd_mach_sh3,             arch_sh3,             arch_sh3_up },
+  { bfd_mach_sh3_nommu,       arch_sh3_nommu,       arch_sh3_nommu_up },
+  { bfd_mach_sh3_dsp,         arch_sh3_dsp,         arch_sh3_dsp_up },
+  { bfd_mach_sh3e,            arch_sh3e,            arch_sh3e_up },
+  { bfd_mach_sh4,             arch_sh4,             arch_sh4_up },
+  { bfd_mach_sh4a,            arch_sh4a,            arch_sh4a_up },
+  { bfd_mach_sh4al_dsp,       arch_sh4al_dsp,       arch_sh4al_dsp_up },
+  { bfd_mach_sh4_nofpu,       arch_sh4_nofpu,       arch_sh4_nofp_up },
+  { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up },
+  { bfd_mach_sh4a_nofpu,      arch_sh4a_nofpu,      arch_sh4a_nofp_up },
+  { 0, 0, 0 }   /* Terminator.  */
+};
+
+
+/* Convert a BFD mach number into the right opcodes arch flags
+   using the table above.  */
+
+unsigned int
+sh_get_arch_from_bfd_mach (unsigned long mach)
+{
+  int i = 0;
+  
+  while (bfd_to_arch_table[i].bfd_mach != 0)
+    if (bfd_to_arch_table[i].bfd_mach == mach)
+      return bfd_to_arch_table[i].arch;
+    else
+      i++;
+
+  /* mach not found.  */
+  BFD_FAIL();
+
+  return SH_ARCH_UNKNOWN_ARCH;
+}
+
+
+/* Convert a BFD mach number into a set of opcodes arch flags
+   describing all the compatible architectures (i.e. arch_up)
+   using the table above.  */
+
+unsigned int
+sh_get_arch_up_from_bfd_mach (unsigned long mach)
+{
+  int i = 0;
+  
+  while (bfd_to_arch_table[i].bfd_mach != 0)
+    if (bfd_to_arch_table[i].bfd_mach == mach)
+      return bfd_to_arch_table[i].arch_up;
+    else
+      i++;
+
+  /* mach not found.  */
+  BFD_FAIL();
+
+  return SH_ARCH_UNKNOWN_ARCH;
+}
+
+
+/* Convert an arbitary arch_set - not necessarily corresponding
+   directly to anything in the table above - to the most generic
+   architecture which supports all the required features, and
+   return the corresponding BFD mach.  */
+
+unsigned long
+sh_get_bfd_mach_from_arch_set (unsigned int arch_set)
+{
+  unsigned long result = 0;
+  unsigned int best = ~arch_set;
+  unsigned int co_mask = ~0;
+  int i = 0;
+
+  /* If arch_set permits variants with no coprocessor then do not allow
+     the other irrelevant co-processor bits to influence the choice:
+       e.g. if dsp is disallowed by arch_set, then the algorithm would
+       prefer fpu variants over nofpu variants because they also disallow
+       dsp - even though the nofpu would be the most correct choice.
+     This assumes that EVERY fpu/dsp variant has a no-coprocessor
+     counter-part, or their non-fpu/dsp instructions do not have the
+     no co-processor bit set.  */
+  if (arch_set & arch_sh_no_co)
+    co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp);
+
+  while (bfd_to_arch_table[i].bfd_mach != 0)
+    {
+      unsigned int try = bfd_to_arch_table[i].arch_up & co_mask;
+
+      /* Conceptually: Find the architecture with the least number
+	 of extra features or, if they have the same number, then
+	 the greatest number of required features.  Disregard
+         architectures where the required features alone do
+	 not describe a valid architecture.  */
+      if (((try & ~arch_set) < (best & ~arch_set)
+	   || ((try & ~arch_set) == (best & ~arch_set)
+	       && (~try & arch_set) < (~best & arch_set)))
+	  && SH_MERGE_ARCH_SET_VALID (try, arch_set))
+	{
+	  result = bfd_to_arch_table[i].bfd_mach;
+	  best = try;
+	}
+
+      i++;
+    }
+
+  /* This might happen if a new variant is added to sh-opc.h
+     but no corresponding entry is added to the table above.  */
+  BFD_ASSERT (result != 0);
+
+  return result;
+}
+
+
+/* Merge the architecture type of two BFD files, such that the
+   resultant architecture supports all the features required
+   by the two input BFDs.
+   If the input BFDs are multually incompatible - i.e. one uses
+   DSP while the other uses FPU - or there is no known architecture
+   that fits the requirements then an error is emitted.  */
+
+bfd_boolean
+sh_merge_bfd_arch (bfd *ibfd, bfd *obfd)
+{
+  unsigned int old_arch, new_arch, merged_arch;
+
+  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
+    return FALSE;
+
+  old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
+  new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
+
+  merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
+
+  if (!SH_VALID_CO_ARCH_SET (merged_arch))
+    {
+      (*_bfd_error_handler)
+	("%s: uses %s instructions while previous modules use %s instructions",
+	 bfd_archive_filename (ibfd),
+	 SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
+	 SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+  else if (!SH_VALID_ARCH_SET (merged_arch))
+    {
+      (*_bfd_error_handler)
+	("internal error: merge of architecture '%s' with architecture '%s' produced unknown architecture\n",
+	 bfd_printable_name (obfd),
+	 bfd_printable_name (ibfd));
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+
+  bfd_default_set_arch_mach (obfd, bfd_arch_sh,
+			     sh_get_bfd_mach_from_arch_set (merged_arch));
+  
+  return TRUE;
+}