1 files changed, 84 insertions, 0 deletions
diff --git a/libasm/asm_addsleb128.c b/libasm/asm_addsleb128.c
new file mode 100644
index 00000000..0661b36e
--- /dev/null
+++ b/libasm/asm_addsleb128.c
@@ -0,0 +1,84 @@
+/* Add signed little endian base 128 integer to a section.
+   Copyright (C) 2002 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   This program is Open Source software; you can redistribute it and/or
+   modify it under the terms of the Open Software License version 1.0 as
+   published by the Open Source Initiative.
+
+   You should have received a copy of the Open Software License along
+   with this program; if not, you may obtain a copy of the Open Software
+   License version 1.0 from http://www.opensource.org/licenses/osl.php or
+   by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
+   3001 King Ranch Road, Ukiah, CA 95482.   */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <inttypes.h>
+#include <string.h>
+
+#include <libasmP.h>
+
+
+int
+asm_addsleb128 (asmscn, num)
+     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))
+    printf ("\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;
+}