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
|
/* ----------------------------------------------------------------------- *
*
* Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston MA 02110-1301, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <dprintf.h>
#include <com32.h>
#include <sys/exec.h>
#include <sys/io.h>
#include <sys/module.h>
#include "core.h"
#include "menu.h"
#include "fs.h"
#include "config.h"
#include "localboot.h"
#include "bios.h"
#include <syslinux/bootrm.h>
#include <syslinux/movebits.h>
#include <syslinux/config.h>
#include <syslinux/boot.h>
const struct image_types image_boot_types[] = {
{ "localboot", IMAGE_TYPE_LOCALBOOT },
{ "kernel", IMAGE_TYPE_KERNEL },
{ "linux", IMAGE_TYPE_LINUX },
{ "boot", IMAGE_TYPE_BOOT },
{ "bss", IMAGE_TYPE_BSS },
{ "pxe", IMAGE_TYPE_PXE },
{ "fdimage", IMAGE_TYPE_FDIMAGE },
{ "com32", IMAGE_TYPE_COM32 },
{ "config", IMAGE_TYPE_CONFIG },
{ NULL, 0 },
};
extern jmp_buf __return_to_command_prompt;
extern int create_args_and_load(char *);
__export void execute(const char *cmdline, uint32_t type, bool sysappend)
{
const char *kernel, *args;
const char *p;
com32sys_t ireg;
char *q, ch;
memset(&ireg, 0, sizeof ireg);
if (strlen(cmdline) >= MAX_CMDLINE_LEN) {
printf("cmdline too long\n");
return;
}
q = malloc(MAX_CMDLINE_LEN);
if (!q) {
printf("%s(): Fail to malloc a buffer to exec %s\n",
__func__, cmdline);
return;
}
kernel = q;
p = cmdline;
while (*p && !my_isspace(*p))
*q++ = *p++;
*q++ = '\0';
args = q;
while (*p && my_isspace(*p))
p++;
do {
*q++ = ch = *p++;
} while (ch);
if (sysappend) {
/* If we've seen some args, insert a space */
if (--q != args)
*q++ = ' ';
do_sysappend(q);
}
dprintf("kernel is %s, args = %s type = %d \n", kernel, args, type);
if (kernel[0] == '.') {
/* It might be a type specifier */
const struct image_types *t;
for (t = image_boot_types; t->name; t++) {
if (!strcmp(kernel + 1, t->name)) {
/*
* Strip the type specifier, apply the
* filename extension if COM32 and
* retry.
*/
p = args;
if (t->type == IMAGE_TYPE_COM32) {
p = apply_extension(p, ".c32");
if (!p)
return;
}
execute(p, t->type, sysappend);
return;
}
}
}
if (type == IMAGE_TYPE_COM32) {
/*
* We may be called with the console in an unknown
* state, so initialise it.
*/
ldlinux_console_init();
/* new entry for elf format c32 */
if (create_args_and_load((char *)cmdline))
printf("Failed to load COM32 file %s\n", kernel);
/*
* The old COM32 module code would run the module then
* drop the user back at the command prompt,
* irrespective of how the COM32 module was loaded,
* e.g. from vesamenu.c32.
*/
unload_modules_since(LDLINUX);
/* Restore the console */
ldlinux_console_init();
/* Jump back to the main to call ldlinux_enter_command */
longjmp(__return_to_command_prompt, 1);
} else if (type == IMAGE_TYPE_CONFIG) {
char *argv[] = { LDLINUX, NULL, NULL };
char *config;
int rv;
/* kernel contains the config file name */
config = malloc(FILENAME_MAX);
if (!config)
goto out;
realpath(config, kernel, FILENAME_MAX);
/* If we got anything on the command line, do a chdir */
if (*args)
mangle_name(config_cwd, args);
argv[1] = config;
rv = start_ldlinux(2, argv);
printf("Failed to exec %s: %s\n", LDLINUX, strerror(rv));
} else if (type == IMAGE_TYPE_LOCALBOOT) {
local_boot(strtoul(kernel, NULL, 0));
} else if (type == IMAGE_TYPE_PXE || type == IMAGE_TYPE_BSS ||
type == IMAGE_TYPE_BOOT) {
chainboot_file(kernel, type);
} else {
/* Need add one item for kernel load, as we don't use
* the assembly runkernel.inc any more */
new_linux_kernel((char *)kernel, (char *)args);
}
out:
free((void *)kernel);
/* If this returns, something went bad; return to menu */
}
|
