1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
#include <unistd.h>
#include <merror.h>
#include <string.h>
#include <stdio.h>
#include "gen.h"
#include "masm.h"
#include "asm/elf32.h"
void help(void) {
printf(
"usage: masm [options] source.asm\n"
"\n"
"options: \n"
" -h print the help message \n"
" -g assume undefined symbols are external\n"
" -o <output> specify the object file output name \n"
" -a <abi> specify mips abi used [none, o32] \n"
" default: o32 \n"
" -i <isa> mips machine isa to assemble for [mips1, mips32r2, mips32r6] \n"
" default: mips32r6\n"
" -f <format> specify the object file format [elf32] \n"
" defualt: elf32\n"
);
}
static int read_isa(enum isa *isa, const char *str)
{
#define __ISA_CHK(name) \
if (strcasecmp(#name, str) == 0) { \
*isa = ISA_ ##name; \
return M_SUCCESS; \
} \
__ISA_CHK(MIPS1);
__ISA_CHK(MIPS32R2);
__ISA_CHK(MIPS32R6);
ERROR("invalid isa '%s'", str);
return M_ERROR;
}
static int read_abi(enum abi *abi, const char *str)
{
#define __ABI_CHK(name) \
if (strcasecmp(#name, str) == 0) { \
*abi = ABI_ ##name; \
return M_SUCCESS; \
} \
__ABI_CHK(O32);
__ABI_CHK(NONE);
ERROR("invalid abi '%s'", str);
return M_ERROR;
}
static int read_format(enum format *format, const char *str)
{
#define __FORMAT_CHK(name) \
if (strcasecmp(#name, str) == 0) { \
*format = FORMAT_ ##name; \
return M_SUCCESS; \
} \
__FORMAT_CHK(ELF32);
ERROR("invalid format '%s'", str);
return M_ERROR;
}
static int generate(struct generator *gen, struct arguments *args)
{
if (generator_init(args->in_file, gen))
return M_ERROR;
switch (args->isa) {
case ISA_MIPS1:
return generate_mips1(gen);
case ISA_MIPS32R2:
return generate_mips32r2(gen);
case ISA_MIPS32R6:
return generate_mips32r6(gen);
}
return M_ERROR;
}
static int assemble(struct arguments *args)
{
struct generator gen;
int res = M_SUCCESS;
if (generate(&gen, args))
return M_ERROR;
switch (args->format) {
case FORMAT_ELF32:
res = assemble_elf32(&gen, args);
break;
default:
res = M_ERROR;
break;
}
generator_free(&gen);
return res;
}
int main(int argc, char **argv) {
struct arguments args = {
.in_file = NULL,
.out_file = "out.o",
.extern_undefined = false,
.isa = ISA_MIPS32R6,
.abi = ABI_O32,
.format = FORMAT_ELF32
};
int c;
while ((c = getopt(argc, argv, "hgo:a:i:f:")) != 1) {
switch(c) {
case 'h':
help();
return M_SUCCESS;
case 'g':
args.extern_undefined = true;
break;
case 'o':
args.out_file = optarg;
break;
case 'a':
if (read_abi(&args.abi, optarg))
return M_ERROR;
break;
case 'i':
if (read_isa(&args.isa, optarg))
return M_ERROR;
break;
case 'f':
if (read_format(&args.format, optarg))
return M_ERROR;
break;
case '?':
return M_ERROR;
default:
goto next;
}
}
next:
if (optind < argc - 1) {
ERROR("too many source files passed");
return M_ERROR;
}
if (optind >= argc) {
ERROR("no source files passed");
return M_ERROR;
}
args.in_file = argv[optind];
return assemble(&args);
}
|
