1 /* Add integer to a section.
2 Copyright (C) 2002 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 This program is Open Source software; you can redistribute it and/or
6 modify it under the terms of the Open Software License version 1.0 as
7 published by the Open Source Initiative.
8
9 You should have received a copy of the Open Software License along
10 with this program; if not, you may obtain a copy of the Open Software
11 License version 1.0 from http://www.opensource.org/licenses/osl.php or
12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
13 3001 King Ranch Road, Ukiah, CA 95482. */
14
15 #ifdef HAVE_CONFIG_H
16 # include <config.h>
17 #endif
18
19 #include <inttypes.h>
20 #include <string.h>
21
22 #include "libasmP.h"
23
24
25 int
asm_adduleb128(asmscn,num)26 asm_adduleb128 (asmscn, num)
27 AsmScn_t *asmscn;
28 uint32_t num;
29 {
30 if (asmscn == NULL)
31 return -1;
32
33 if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
34 {
35 __libasm_seterrno (ASM_E_TYPE);
36 return -1;
37 }
38
39 if (unlikely (asmscn->ctx->textp))
40 printf ("\t.uleb128\t%" PRIu32 "\n", num);
41 else
42 {
43 char tmpbuf[(sizeof (num) * 8 + 6) / 7];
44 char *dest = tmpbuf;
45 uint32_t byte;
46
47 while (1)
48 {
49 byte = num & 0x7f;
50
51 num >>= 7;
52 if (num == 0)
53 /* This is the last byte. */
54 break;
55
56 *dest++ = byte | 0x80;
57 }
58
59 *dest++ = byte;
60
61 /* Number of bytes produced. */
62 size_t nbytes = dest - tmpbuf;
63
64 /* Make sure we have enough room. */
65 if (__libasm_ensure_section_space (asmscn, nbytes) != 0)
66 return -1;
67
68 /* Copy the bytes. */
69 if (likely (asmscn->type != SHT_NOBITS))
70 memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes);
71
72 /* Adjust the pointer in the data buffer. */
73 asmscn->content->len += nbytes;
74
75 /* Increment the offset in the (sub)section. */
76 asmscn->offset += nbytes;
77 }
78
79 return 0;
80 }
81