1 /* Add integer to a section.
2 Copyright (C) 2002, 2005 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <byteswap.h>
35 #include <endian.h>
36 #include <inttypes.h>
37 #include <string.h>
38
39 #include <libasmP.h>
40
41 #ifndef SIZE
42 # define SIZE 8
43 #endif
44
45 #define FCT(size) _FCT(size)
46 #define _FCT(size) asm_addint##size
47 #define TYPE(size) _TYPE(size)
48 #define _TYPE(size) int##size##_t
49 #define BSWAP(size) _BSWAP(size)
50 #define _BSWAP(size) bswap_##size
51
52
53 int
FCT(SIZE)54 FCT(SIZE) (AsmScn_t *asmscn, TYPE(SIZE) num)
55 {
56 if (asmscn == NULL)
57 return -1;
58
59 if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
60 {
61 __libasm_seterrno (ASM_E_TYPE);
62 return -1;
63 }
64
65 if (unlikely (asmscn->ctx->textp))
66 {
67 // XXX Needs to use backend specified pseudo-ops
68 if (SIZE == 8)
69 fprintf (asmscn->ctx->out.file, "\t.byte\t%" PRId8 "\n", (int8_t) num);
70 else if (SIZE == 16)
71 fprintf (asmscn->ctx->out.file, "\t.value\t%" PRId16 "\n",
72 (int16_t) num);
73 else if (SIZE == 32)
74 fprintf (asmscn->ctx->out.file, "\t.long\t%" PRId32 "\n",
75 (int32_t) num);
76 else
77 {
78 // XXX This is not necessary for 64-bit machines
79 bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
80 == ELFDATA2LSB);
81
82 fprintf (asmscn->ctx->out.file,
83 "\t.long\t%" PRId32 "\n\t.long\t%" PRId32 "\n",
84 (int32_t) (is_leb
85 ? num % 0x100000000ll : num / 0x100000000ll),
86 (int32_t) (is_leb
87 ? num / 0x100000000ll : num % 0x100000000ll));
88 }
89 }
90 else
91 {
92 #if SIZE > 8
93 bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
94 == ELFDATA2LSB);
95 #endif
96 TYPE(SIZE) var = num;
97
98 /* Make sure we have enough room. */
99 if (__libasm_ensure_section_space (asmscn, SIZE / 8) != 0)
100 return -1;
101
102 #if SIZE > 8
103 if ((BYTE_ORDER == LITTLE_ENDIAN && !is_leb)
104 || (BYTE_ORDER == BIG_ENDIAN && is_leb))
105 var = BSWAP(SIZE) (var);
106 #endif
107
108 /* Copy the variable value. */
109 if (likely (asmscn->type == SHT_NOBITS))
110 memcpy (&asmscn->content->data[asmscn->content->len], &var, SIZE / 8);
111
112 /* Adjust the pointer in the data buffer. */
113 asmscn->content->len += SIZE / 8;
114
115 /* Increment the offset in the (sub)section. */
116 asmscn->offset += SIZE / 8;
117 }
118
119 return 0;
120 }
121 INTDEF(FCT(SIZE))
122