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
171
172
173
174
175
176
177
|
/****************************************************************/
/* mdso: midipix dso scavenger */
/* Copyright (C) 2015 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.MDSO. */
/****************************************************************/
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#define ARGV_DRIVER
#include <mdso/mdso.h>
#include "mdso_driver_impl.h"
#include "argv/argv.h"
extern const struct argv_option mdso_default_options[];
struct mdso_driver_ctx_alloc {
struct argv_meta * meta;
struct mdso_driver_ctx_impl ctx;
uint64_t guard;
const char * units[];
};
static uint32_t mdso_argv_flags(uint32_t flags)
{
uint32_t ret = 0;
if (flags & MDSO_DRIVER_VERBOSITY_NONE)
ret |= ARGV_VERBOSITY_NONE;
if (flags & MDSO_DRIVER_VERBOSITY_ERRORS)
ret |= ARGV_VERBOSITY_ERRORS;
if (flags & MDSO_DRIVER_VERBOSITY_STATUS)
ret |= ARGV_VERBOSITY_STATUS;
return ret;
}
static int mdso_driver_usage(
const char * program,
const char * arg,
const struct argv_option * options,
struct argv_meta * meta)
{
char header[512];
snprintf(header,sizeof(header),
"Usage: %s [options] <file>...\n" "Options:\n",
program);
argv_usage(stdout,header,options,arg);
argv_free(meta);
return MDSO_USAGE;
}
static struct mdso_driver_ctx_impl * mdso_driver_ctx_alloc(struct argv_meta * meta, size_t nunits)
{
struct mdso_driver_ctx_alloc * ictx;
size_t size;
struct argv_entry * entry;
const char ** units;
size = sizeof(struct mdso_driver_ctx_alloc);
size += (nunits+1)*sizeof(const char *);
if (!(ictx = calloc(size,1)))
return 0;
for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
if (!entry->fopt)
*units++ = entry->arg;
ictx->ctx.ctx.units = ictx->units;
return &ictx->ctx;
}
int mdso_get_driver_ctx_fail(struct argv_meta * meta)
{
argv_free(meta);
return -1;
}
int mdso_get_driver_ctx(
const char ** argv,
const char ** envp,
uint32_t flags,
struct mdso_driver_ctx ** pctx)
{
struct mdso_driver_ctx_impl * ctx;
struct mdso_common_ctx cctx;
const struct argv_option * options;
struct argv_meta * meta;
struct argv_entry * entry;
size_t nunits;
const char * program;
options = mdso_default_options;
if (!(meta = argv_get(argv,options,mdso_argv_flags(flags))))
return -1;
nunits = 0;
program = argv_program_name(argv[0]);
memset(&cctx,0,sizeof(cctx));
if (!argv[1] && (flags & MDSO_DRIVER_VERBOSITY_USAGE))
return mdso_driver_usage(program,0,options,meta);
/* get options, count units */
for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
if (entry->fopt) {
switch (entry->tag) {
case TAG_HELP:
if (flags & MDSO_DRIVER_VERBOSITY_USAGE)
return mdso_driver_usage(program,entry->arg,options,meta);
case TAG_VERSION:
cctx.drvflags |= MDSO_DRIVER_VERSION;
break;
}
} else
nunits++;
}
if (!(ctx = mdso_driver_ctx_alloc(meta,nunits)))
return mdso_get_driver_ctx_fail(meta);
ctx->ctx.program = program;
ctx->ctx.cctx = &ctx->cctx;
memcpy(&ctx->cctx,&cctx,sizeof(cctx));
*pctx = &ctx->ctx;
return MDSO_OK;
}
int mdso_create_driver_ctx(
const struct mdso_common_ctx * cctx,
struct mdso_driver_ctx ** pctx)
{
struct argv_meta * meta;
struct mdso_driver_ctx_impl * ctx;
const char * argv[] = {"mdso_driver",0};
if (!(meta = argv_get(argv,mdso_default_options,0)))
return -1;
if (!(ctx = mdso_driver_ctx_alloc(meta,0)))
return mdso_get_driver_ctx_fail(0);
ctx->ctx.cctx = &ctx->cctx;
memcpy(&ctx->cctx,cctx,sizeof(*cctx));
*pctx = &ctx->ctx;
return MDSO_OK;
}
static void mdso_free_driver_ctx_impl(struct mdso_driver_ctx_alloc * ictx)
{
argv_free(ictx->meta);
free(ictx);
}
void mdso_free_driver_ctx(struct mdso_driver_ctx * ctx)
{
struct mdso_driver_ctx_alloc * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct mdso_driver_ctx_alloc,ctx);
addr = addr - offsetof(struct mdso_driver_ctx_impl,ctx);
ictx = (struct mdso_driver_ctx_alloc *)addr;
mdso_free_driver_ctx_impl(ictx);
}
}
|
