1 files changed, 117 insertions, 0 deletions
diff --git a/libasm/asm_newcomsym.c b/libasm/asm_newcomsym.c
new file mode 100644
index 00000000..7a578e0c
--- /dev/null
+++ b/libasm/asm_newcomsym.c
@@ -0,0 +1,117 @@
+/* Create new COMMON symbol.
+   Copyright (C) 2002 Red Hat, Inc.
+   This file is part of elfutils.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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 <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libasmP.h>
+#include <system.h>
+
+
+/* Object for special COMMON section.  */
+static const AsmScn_t __libasm_com_scn =
+  {
+    .data = {
+      .main = {
+	.scn = ASM_COM_SCN
+      }
+    }
+  };
+
+
+AsmSym_t *
+asm_newcomsym (ctx, name, size, align)
+     AsmCtx_t *ctx;
+     const char *name;
+     GElf_Xword size;
+     GElf_Addr align;
+{
+  AsmSym_t *result;
+
+  if (ctx == NULL)
+    /* Something went wrong before.  */
+    return NULL;
+
+  /* Common symbols are public.  Therefore the user must provide a
+     name.  */
+  if (name == NULL)
+    {
+      __libasm_seterrno (ASM_E_INVALID);
+      return NULL;
+    }
+
+  rwlock_wrlock (ctx->lock);
+
+  result = (AsmSym_t *) malloc (sizeof (AsmSym_t));
+  if (result == NULL)
+    return NULL;
+
+  result->scn = (AsmScn_t *) &__libasm_com_scn;
+  result->size = size;
+  /* XXX Do we have to allow a different type?  */
+  result->type = STT_OBJECT;
+  /* XXX Do we have to allow a different binding?  */
+  result->binding = STB_GLOBAL;
+  result->symidx = 0;
+  result->strent = ebl_strtabadd (ctx->symbol_strtab, name, 0);
+
+  /* The value of a COM symbol is the alignment.  Since there are no
+     subsection and the initial offset of the section is 0 we can get
+     the alignment recorded by storing it into the offset field.  */
+  result->offset = align;
+
+  if (unlikely (ctx->textp))
+    fprintf (ctx->out.file, "\t.comm %s, %" PRIuMAX ", %" PRIuMAX "\n",
+	     name, (uintmax_t) size, (uintmax_t) align);
+  else
+    {
+      /* Put the symbol in the hash table so that we can later find it.  */
+      if (asm_symbol_tab_insert (&ctx->symbol_tab, elf_hash (name), result)
+	  != 0)
+	{
+	  /* The symbol already exists.  */
+	  __libasm_seterrno (ASM_E_DUPLSYM);
+	  free (result);
+	  result = NULL;
+	}
+      else if (name != NULL && asm_emit_symbol_p (name))
+	/* Only count non-private symbols.  */
+	++ctx->nsymbol_tab;
+    }
+
+  rwlock_unlock (ctx->lock);
+
+  return result;
+}