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 <inttypes.h>
35 #include <string.h>
36
37 #include <libasmP.h>
38
39 #ifndef SIZE
40 # define SIZE 8
41 #endif
42
43 #define FCT(size) _FCT(size)
44 #define _FCT(size) asm_addint##size
45 #define TYPE(size) _TYPE(size)
46 #define _TYPE(size) int##size##_t
47 #define BSWAP(size) _BSWAP(size)
48 #define _BSWAP(size) bswap_##size
49
50
51 int
FCT(SIZE)52 FCT(SIZE) (AsmScn_t *asmscn, TYPE(SIZE) num)
53 {
54 if (asmscn == NULL)
55 return -1;
56
57 if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
58 {
59 __libasm_seterrno (ASM_E_TYPE);
60 return -1;
61 }
62
63 if (unlikely (asmscn->ctx->textp))
64 {
65 // XXX Needs to use backend specified pseudo-ops
66 if (SIZE == 8)
67 fprintf (asmscn->ctx->out.file, "\t.byte\t%" PRId8 "\n", (int8_t) num);
68 else if (SIZE == 16)
69 fprintf (asmscn->ctx->out.file, "\t.value\t%" PRId16 "\n",
70 (int16_t) num);
71 else if (SIZE == 32)
72 fprintf (asmscn->ctx->out.file, "\t.long\t%" PRId32 "\n",
73 (int32_t) num);
74 else
75 {
76 // XXX This is not necessary for 64-bit machines
77 bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
78 == ELFDATA2LSB);
79
80 fprintf (asmscn->ctx->out.file,
81 "\t.long\t%" PRId32 "\n\t.long\t%" PRId32 "\n",
82 (int32_t) (is_leb
83 ? num % 0x100000000ll : num / 0x100000000ll),
84 (int32_t) (is_leb
85 ? num / 0x100000000ll : num % 0x100000000ll));
86 }
87 }
88 else
89 {
90 #if SIZE > 8
91 bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
92 == ELFDATA2LSB);
93 #endif
94 TYPE(SIZE) var = num;
95
96 /* Make sure we have enough room. */
97 if (__libasm_ensure_section_space (asmscn, SIZE / 8) != 0)
98 return -1;
99
100 #if SIZE > 8
101 if ((BYTE_ORDER == LITTLE_ENDIAN && !is_leb)
102 || (BYTE_ORDER == BIG_ENDIAN && is_leb))
103 var = BSWAP(SIZE) (var);
104 #endif
105
106 /* Copy the variable value. */
107 if (likely (asmscn->type == SHT_NOBITS))
108 memcpy (&asmscn->content->data[asmscn->content->len], &var, SIZE / 8);
109
110 /* Adjust the pointer in the data buffer. */
111 asmscn->content->len += SIZE / 8;
112
113 /* Increment the offset in the (sub)section. */
114 asmscn->offset += SIZE / 8;
115 }
116
117 return 0;
118 }
119 INTDEF(FCT(SIZE))
120