Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libasm/asm_newabssym.c b/libasm/asm_newabssym.c
new file mode 100644
index 0000000..34fef3e
--- /dev/null
+++ b/libasm/asm_newabssym.c
@@ -0,0 +1,131 @@
+/* Create new ABS symbol.
+ Copyright (C) 2002, 2016 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_abs_scn =
+ {
+ .data = {
+ .main = {
+ .scn = ASM_ABS_SCN
+ }
+ }
+ };
+
+
+AsmSym_t *
+asm_newabssym (AsmCtx_t *ctx, const char *name, GElf_Xword size,
+ GElf_Addr value, int type, int binding)
+{
+ 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_abs_scn;
+ result->size = size;
+ result->type = type;
+ result->binding = binding;
+ result->symidx = 0;
+ result->strent = dwelf_strtab_add (ctx->symbol_strtab, name);
+
+ /* The value of an ABS symbol must not be modified. 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 = value;
+
+ if (unlikely (ctx->textp))
+ {
+ /* An absolute symbol can be defined by giving a symbol a
+ specific value. */
+ if (binding == STB_GLOBAL)
+ fprintf (ctx->out.file, "\t.globl %s\n", name);
+ else if (binding == STB_WEAK)
+ fprintf (ctx->out.file, "\t.weak %s\n", name);
+
+ if (type == STT_OBJECT)
+ fprintf (ctx->out.file, "\t.type %s,@object\n", name);
+ else if (type == STT_FUNC)
+ fprintf (ctx->out.file, "\t.type %s,@function\n", name);
+
+ fprintf (ctx->out.file, "%s = %llu\n",
+ name, (unsigned long long int) value);
+
+ if (size != 0)
+ fprintf (ctx->out.file, "\t.size %s, %llu\n",
+ name, (unsigned long long int) size);
+ }
+ 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;
+}