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_addsleb128.c b/libasm/asm_addsleb128.c
new file mode 100644
index 0000000..dc62c95
--- /dev/null
+++ b/libasm/asm_addsleb128.c
@@ -0,0 +1,97 @@
+/* Add signed little endian base 128 integer to a section.
+ Copyright (C) 2002, 2005 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 <string.h>
+
+#include <libasmP.h>
+
+
+int
+asm_addsleb128 (AsmScn_t *asmscn, int32_t num)
+{
+ if (asmscn == NULL)
+ return -1;
+
+ if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
+ {
+ __libasm_seterrno (ASM_E_TYPE);
+ return -1;
+ }
+
+ if (unlikely (asmscn->ctx->textp))
+ fprintf (asmscn->ctx->out.file, "\t.sleb128\t%" PRId32 "\n", num);
+ else
+ {
+ char tmpbuf[(sizeof (num) * 8 + 6) / 7];
+ char *dest = tmpbuf;
+ uint32_t byte;
+ int32_t endval = num >> 31;
+
+ if (num == 0)
+ byte = 0;
+ else
+ while (1)
+ {
+ byte = num & 0x7f;
+
+ num >>= 7;
+ if (num == endval)
+ /* This is the last byte. */
+ break;
+
+ *dest++ = byte | 0x80;
+ }
+
+ *dest++ = byte;
+
+ /* Number of bytes produced. */
+ size_t nbytes = dest - tmpbuf;
+
+ /* Make sure we have enough room. */
+ if (__libasm_ensure_section_space (asmscn, nbytes) != 0)
+ return -1;
+
+ /* Copy the bytes. */
+ if (likely (asmscn->type != SHT_NOBITS))
+ memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes);
+
+ /* Adjust the pointer in the data buffer. */
+ asmscn->content->len += nbytes;
+
+ /* Increment the offset in the (sub)section. */
+ asmscn->offset += nbytes;
+ }
+
+ return 0;
+}