elf: Strip zero-sized dynamic sections

[deliverable/binutils-gdb.git] / bfd / cpu-rs6000.c

diff --git a/bfd/cpu-rs6000.c b/bfd/cpu-rs6000.c
index fe466a33ee1d2445bc9b993e2e710bf6ca5400b4..91aed491256d0bcb50585fca120ff2454553c184 100644 (file)
--- a/bfd/cpu-rs6000.c
+++ b/bfd/cpu-rs6000.c
@@ -1,44 +1,75 @@
 /* BFD back-end for rs6000 support
-   Copyright (C) 1990-1991 Free Software Foundation, Inc.
-   Written by Mimi Phûông-Thåo Võ of IBM and John Gilmore of Cygnus Support.
+   Copyright (C) 1990-2020 Free Software Foundation, Inc.
+   Written by Mimi Phuong-Thao Vo of IBM
+   and John Gilmore of Cygnus Support.
 
-This file is part of BFD, the Binary File Descriptor library.
+   This file is part of BFD, the Binary File Descriptor library.
 
-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 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.
+   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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   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 "bfd.h"
 #include "sysdep.h"
+#include "bfd.h"
 #include "libbfd.h"
 
-static bfd_arch_info_type arch_info_struct = 
-  {
-    32,        /* 32 bits in a word */
-    32,        /* 32 bits in an address */
-    8, /* 8 bits in a byte */
-    bfd_arch_rs6000,
-    6000,      /* only 1 machine */
-    "rs6000",
-    "rs6000:6000",
-    true, /* the one and only */
-    bfd_default_compatible, 
-    bfd_default_scan ,
-    0,
-    0,
-  };
-
-void DEFUN_VOID(bfd_rs6000_arch)
+/* The RS/6000 architecture is compatible with the PowerPC common
+   architecture.  */
+
+static const bfd_arch_info_type *
+rs6000_compatible (const bfd_arch_info_type *a,
+                  const bfd_arch_info_type *b)
 {
-  bfd_arch_linkin(&arch_info_struct);
+  BFD_ASSERT (a->arch == bfd_arch_rs6000);
+  switch (b->arch)
+    {
+    default:
+      return NULL;
+    case bfd_arch_rs6000:
+      return bfd_default_compatible (a, b);
+    case bfd_arch_powerpc:
+      if (a->mach == bfd_mach_rs6k)
+       return b;
+      return NULL;
+    }
+  /*NOTREACHED*/
 }
+
+#define N(NUMBER, PRINT, DEFAULT, NEXT)                        \
+  {                                                    \
+    32,        /* Bits in a word.  */                  \
+    32,        /* Bits in an address.  */              \
+    8,        /* Bits in a byte.  */                   \
+    bfd_arch_rs6000,                                   \
+    NUMBER,                                            \
+    "rs6000",                                          \
+    PRINT,                                             \
+    3,         /* Section alignment power.  */         \
+    DEFAULT,                                           \
+    rs6000_compatible,                                 \
+    bfd_default_scan,                                  \
+    bfd_arch_default_fill,                             \
+    NEXT,                                              \
+    0 /* Maximum offset of a reloc from the start of an insn.  */ \
+  }
+
+static const bfd_arch_info_type arch_info_struct[3] =
+{
+  N (bfd_mach_rs6k_rs1, "rs6000:rs1", FALSE, arch_info_struct + 1),
+  N (bfd_mach_rs6k_rsc, "rs6000:rsc", FALSE, arch_info_struct + 2),
+  N (bfd_mach_rs6k_rs2, "rs6000:rs2", FALSE, NULL)
+};
+
+const bfd_arch_info_type bfd_rs6000_arch =
+  N (bfd_mach_rs6k, "rs6000:6000", TRUE, arch_info_struct + 0);