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
54 FCT(SIZE) (asmscn, num)
55      AsmScn_t *asmscn;
56      TYPE(SIZE) num;
57 {
58   if (asmscn == NULL)
59     return -1;
60 
61   if (asmscn->type == SHT_NOBITS && unlikely (num != 0))
62     {
63       __libasm_seterrno (ASM_E_TYPE);
64       return -1;
65     }
66 
67   if (unlikely (asmscn->ctx->textp))
68     {
69       // XXX Needs to use backend specified pseudo-ops
70       if (SIZE == 8)
71 	fprintf (asmscn->ctx->out.file, "\t.byte\t%" PRId8 "\n", (int8_t) num);
72       else if (SIZE == 16)
73 	fprintf (asmscn->ctx->out.file, "\t.value\t%" PRId16 "\n",
74 		 (int16_t) num);
75       else if (SIZE == 32)
76 	fprintf (asmscn->ctx->out.file, "\t.long\t%" PRId32 "\n",
77 		 (int32_t) num);
78       else
79 	{
80 	  // XXX This is not necessary for 64-bit machines
81 	  bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
82 			 == ELFDATA2LSB);
83 
84 	  fprintf (asmscn->ctx->out.file,
85 		   "\t.long\t%" PRId32 "\n\t.long\t%" PRId32 "\n",
86 		   (int32_t) (is_leb
87 			      ? num % 0x100000000ll : num / 0x100000000ll),
88 		   (int32_t) (is_leb
89 			      ? num / 0x100000000ll : num % 0x100000000ll));
90 	}
91     }
92   else
93     {
94 #if SIZE > 8
95       bool is_leb = (elf_getident (asmscn->ctx->out.elf, NULL)[EI_DATA]
96 		     == ELFDATA2LSB);
97 #endif
98       TYPE(SIZE) var = num;
99 
100       /* Make sure we have enough room.  */
101       if (__libasm_ensure_section_space (asmscn, SIZE / 8) != 0)
102 	return -1;
103 
104 #if SIZE > 8
105       if ((BYTE_ORDER == LITTLE_ENDIAN && !is_leb)
106 	  || (BYTE_ORDER == BIG_ENDIAN && is_leb))
107 	var = BSWAP(SIZE) (var);
108 #endif
109 
110       /* Copy the variable value.  */
111       if (likely (asmscn->type == SHT_NOBITS))
112 	memcpy (&asmscn->content->data[asmscn->content->len], &var, SIZE / 8);
113 
114       /* Adjust the pointer in the data buffer.  */
115       asmscn->content->len += SIZE / 8;
116 
117       /* Increment the offset in the (sub)section.  */
118       asmscn->offset += SIZE / 8;
119     }
120 
121   return 0;
122 }
123 INTDEF(FCT(SIZE))
124