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94 lines
2.3 KiB
94 lines
2.3 KiB
4 months ago
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/* Add integer to a section.
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Copyright (C) 2002, 2005 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2002.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <inttypes.h>
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#include <string.h>
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#include "libasmP.h"
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int
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asm_adduleb128 (AsmScn_t *asmscn, uint32_t num)
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{
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if (asmscn == NULL)
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return -1;
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if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
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{
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__libasm_seterrno (ASM_E_TYPE);
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return -1;
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}
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if (unlikely (asmscn->ctx->textp))
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fprintf (asmscn->ctx->out.file, "\t.uleb128\t%" PRIu32 "\n", num);
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else
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{
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char tmpbuf[(sizeof (num) * 8 + 6) / 7];
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char *dest = tmpbuf;
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uint32_t byte;
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while (1)
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{
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byte = num & 0x7f;
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num >>= 7;
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if (num == 0)
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/* This is the last byte. */
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break;
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*dest++ = byte | 0x80;
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}
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*dest++ = byte;
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/* Number of bytes produced. */
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size_t nbytes = dest - tmpbuf;
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/* Make sure we have enough room. */
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if (__libasm_ensure_section_space (asmscn, nbytes) != 0)
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return -1;
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/* Copy the bytes. */
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if (likely (asmscn->type != SHT_NOBITS))
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memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes);
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/* Adjust the pointer in the data buffer. */
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asmscn->content->len += nbytes;
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/* Increment the offset in the (sub)section. */
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asmscn->offset += nbytes;
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}
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return 0;
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}
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