aboutsummaryrefslogtreecommitdiffstats
path: root/com32/elflink/test_com32.c
blob: ca616536e29dab34b5c628a67275d0da0b1b4b5b (plain)
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
#include <stdio.h>
#include <stdlib.h>
#include <console.h>
#include <string.h>

#include <sys/module.h>
#include <sys/exec.h>

#define INFO_PRINT(fmt, args...)	printf("[COM32] " fmt, ##args)

#define MAX_COMMAND_SIZE 	80
#define COMMAND_DELIM		" \t\n"
#define MAX_COMMAND_ARGS	(MAX_COMMAND_SIZE/2)



static void print_help() {
	printf("List of available commands:\n");
	printf("exit - exits the program\n");
	printf("help - shows this message\n");
	printf("load <library>... - loads the libraries into the environment\n");
	printf("spawn <executable> <args> - launches an executable module\n");
	printf("unload <library>... - unloads the libraries from the environment\n");
	printf("list - prints the currently loaded modules\n");
}

static void print_prompt() {
	printf("\nelflink> ");
}

static void read_command(char *cmd, int size) {
	char *nl = NULL;
	fgets(cmd, size, stdin);

	// Strip the newline
	nl = strchr(cmd, '\n');

	if (nl != NULL)
		*nl = '\0';
}

static void process_spawn() {
	// Compose the command line
	char **cmd_line = malloc((MAX_COMMAND_ARGS+1)*sizeof(char*));
	int argc = 0, result;
	char *crt_arg;

	do {
		crt_arg = strtok(NULL, COMMAND_DELIM);
		if (crt_arg != NULL && strlen(crt_arg) > 0) {
			cmd_line[argc] = crt_arg;
			argc++;
		} else {
			break;
		}
	} while (argc < MAX_COMMAND_ARGS);

	cmd_line[argc] = NULL;

	if (cmd_line[0] == NULL) {
		printf("You must specify an executable module.\n");
	} else {
		result = spawnv(cmd_line[0], cmd_line);

		printf("Spawn returned %d\n", result);
	}

	free(cmd_line);
}

static void process_library(int load) {
	char *crt_lib;
	int result;

	while ((crt_lib = strtok(NULL, COMMAND_DELIM)) != NULL) {
		if (strlen(crt_lib) > 0) {
			if (load)
				result = load_library(crt_lib);
			else
				result = unload_library(crt_lib);

			if (result == 0) {
				printf("Library '%s' %sloaded successfully.\n", crt_lib,
						load ? "" : "un");
			} else {
				printf("Could not %sload library '%s': error %d\n",
						load ? "" : "un", crt_lib, result);
			}
		}
	}
}

static void process_list() {
	struct elf_module *module;
	struct module_dep *crt_dep;

	for_each_module(module) {
		printf("%s (%dK, %s, %s) : ", module->name, module->module_size >> 10,
				module->shallow ? "shallow" : "regular",
				module->main_func == NULL ? "library" : "program");

		list_for_each_entry(crt_dep, &module->required, list) {
			printf("%s ", crt_dep->module->name);
		}

		printf("\n");
	}
}

static int process_command(char *cmd) {
	char *cmd_name;

	cmd_name = strtok(cmd, COMMAND_DELIM);

	if (strcmp(cmd_name, "exit") == 0) {
		printf("Goodbye!\n");
		return 1;
	} else if (strcmp(cmd_name, "help") == 0) {
		print_help();
	} else if (strcmp(cmd_name, "load") == 0) {
		process_library(1);
	} else if (strcmp(cmd_name, "spawn") == 0) {
		process_spawn();
	} else if (strcmp(cmd_name, "unload") == 0) {
		process_library(0);
	} else if (strcmp(cmd_name, "list") == 0) {
		process_list();
	} else {
		printf("Unknown command. Type 'help' for a list of valid commands.\n");
	}

	return 0;
}



int main(int argc, char **argv) {
	int done = 0;
	int res;
	char command[MAX_COMMAND_SIZE] = {0};

	// Open a standard r/w console
	openconsole(&dev_stdcon_r, &dev_stdcon_w);

	res = exec_init();
	if (res != 0) {
		printf("Failed to initialize the execution environment.\n");
		return res;
	} else {
		printf("Execution environment initialized successfully.\n");
	}


	printf("\nFor a list of available commands, type 'help'.\n");

	do {
		print_prompt();
		read_command(command, MAX_COMMAND_SIZE);
		done = process_command(command);

	} while (!done);

	exec_term();

	return 0;
}