1 files changed, 94 insertions, 0 deletions
diff --git a/backends/riscv_symbol.c b/backends/riscv_symbol.c
new file mode 100644
index 00000000..dce8e358
--- /dev/null
+++ b/backends/riscv_symbol.c
@@ -0,0 +1,94 @@
+/* RISC-V specific symbolic name handling.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+
+#define BACKEND riscv_
+#include "libebl_CPU.h"
+
+
+/* Check for the simple reloc types.  */
+Elf_Type
+riscv_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type)
+{
+  switch (type)
+    {
+    case R_RISCV_32:
+      return ELF_T_WORD;
+    case R_RISCV_64:
+      return ELF_T_XWORD;
+    default:
+      return ELF_T_NUM;
+    }
+}
+
+/* Check whether machine flags are valid.  */
+bool
+riscv_machine_flag_check (GElf_Word flags)
+{
+  return ((flags &~ (EF_RISCV_RVC
+		     | EF_RISCV_FLOAT_ABI)) == 0);
+}
+
+/* Check whether given symbol's st_value and st_size are OK despite failing
+   normal checks.  */
+bool
+riscv_check_special_symbol (Elf *elf, GElf_Ehdr *ehdr, const GElf_Sym *sym,
+			    const char *name, const GElf_Shdr *destshdr)
+{
+  if (name == NULL)
+    return false;
+
+  const char *sname = elf_strptr (elf, ehdr->e_shstrndx, destshdr->sh_name);
+  if (sname == NULL)
+    return false;
+
+  /* _GLOBAL_OFFSET_TABLE_ points to the start of the .got section, but it
+     is preceded by the .got.plt section in the output .got section.  */
+  if (strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
+    return (strcmp (sname, ".got") == 0
+	    && sym->st_value >= destshdr->sh_addr
+	    && sym->st_value < destshdr->sh_addr + destshdr->sh_size);
+
+  /* __global_pointer$ points to the .sdata section with an offset of
+     0x800.  It might however fall in the .got section, in which case we
+     cannot check the offset.  The size always should be zero.  */
+  if (strcmp (name, "__global_pointer$") == 0)
+    return (((strcmp (sname, ".sdata") == 0
+	      && sym->st_value == destshdr->sh_addr + 0x800)
+	     || strcmp (sname, ".got") == 0)
+	    && sym->st_size == 0);
+
+  return false;
+}