blob: 0661b36ef8716488bb381672986c004a63b07044 [file] [log] [blame]
/* 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;
}