Subversion Repositories HelenOS

Rev

Rev 3203 | Rev 4343 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3203 svoboda 1
/*
2
 * Copyright (c) 2001-2004 Jakub Jermar
3
 * Copyright (c) 2008 Jiri Svoboda
4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 *
10
 * - Redistributions of source code must retain the above copyright
11
 *   notice, this list of conditions and the following disclaimer.
12
 * - Redistributions in binary form must reproduce the above copyright
13
 *   notice, this list of conditions and the following disclaimer in the
14
 *   documentation and/or other materials provided with the distribution.
15
 * - The name of the author may not be used to endorse or promote products
16
 *   derived from this software without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
 */
29
 
30
/** @addtogroup genericproc
31
 * @{
32
 */
33
 
34
/**
35
 * @file
36
 * @brief   Running userspace programs.
37
 */
38
 
39
#include <main/uinit.h>
40
#include <proc/thread.h>
41
#include <proc/task.h>
42
#include <proc/uarg.h>
43
#include <mm/as.h>
44
#include <mm/slab.h>
45
#include <arch.h>
46
#include <adt/list.h>
47
#include <ipc/ipc.h>
48
#include <ipc/ipcrsc.h>
49
#include <security/cap.h>
50
#include <lib/elf.h>
51
#include <errno.h>
52
#include <syscall/copy.h>
53
#include <proc/program.h>
54
 
55
#ifndef LOADED_PROG_STACK_PAGES_NO
56
#define LOADED_PROG_STACK_PAGES_NO 1
57
#endif
58
 
59
/**
60
 * Points to the binary image used as the program loader. All non-initial
61
 * tasks are created from this executable image.
62
 */
63
void *program_loader = NULL;
64
 
3204 svoboda 65
/** Create a program using an existing address space.
3203 svoboda 66
 *
3204 svoboda 67
 * @param as        Address space containing a binary program image.
68
 * @param entry_addr    Program entry-point address in program address space.
69
 * @param p     Buffer for storing program information.
3203 svoboda 70
 */
71
void program_create(as_t *as, uintptr_t entry_addr, program_t *p)
72
{
73
    as_area_t *a;
74
    uspace_arg_t *kernel_uarg;
75
 
76
    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
77
    kernel_uarg->uspace_entry = (void *) entry_addr;
78
    kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;
79
    kernel_uarg->uspace_thread_function = NULL;
80
    kernel_uarg->uspace_thread_arg = NULL;
81
    kernel_uarg->uspace_uarg = NULL;
82
 
83
    p->task = task_create(as, "app");
84
    ASSERT(p->task);
85
 
86
    /*
87
     * Create the data as_area.
88
     */
89
    a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,
90
        LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS,
91
        AS_AREA_ATTR_NONE, &anon_backend, NULL);
92
 
93
    /*
94
     * Create the main thread.
95
     */
96
    p->main_thread = thread_create(uinit, kernel_uarg, p->task,
97
        THREAD_FLAG_USPACE, "uinit", false);
98
    ASSERT(p->main_thread);
99
}
100
 
3204 svoboda 101
/** Parse an executable image in the kernel memory.
3203 svoboda 102
 *
103
 * If the image belongs to a program loader, it is registered as such,
104
 * (and *task is set to NULL). Otherwise a task is created from the
105
 * executable image. The task is returned in *task.
106
 *
3204 svoboda 107
 * @param image_addr    Address of an executable program image.
108
 * @param p     Buffer for storing program info. If image_addr
109
 *          points to a loader image, p->task will be set to
110
 *          NULL and EOK will be returned.
3203 svoboda 111
 *
112
 * @return EOK on success or negative error code.
113
 */
114
int program_create_from_image(void *image_addr, program_t *p)
115
{
116
    as_t *as;
117
    unsigned int rc;
118
 
119
    as = as_create(0);
120
    ASSERT(as);
121
 
122
    rc = elf_load((elf_header_t *) image_addr, as, 0);
123
    if (rc != EE_OK) {
124
        as_destroy(as);
125
        p->task = NULL;
126
        p->main_thread = NULL;
127
        if (rc != EE_LOADER)
128
            return ENOTSUP;
129
 
130
        /* Register image as the program loader */
131
        ASSERT(program_loader == NULL);
132
        program_loader = image_addr;
133
        return EOK;
134
    }
135
 
136
    program_create(as, ((elf_header_t *) image_addr)->e_entry, p);
137
 
138
    return EOK;
139
}
140
 
141
/** Create a task from the program loader image.
142
 *
3204 svoboda 143
 * @param p Buffer for storing program info.
144
 * @return EOK on success or negative error code.
3203 svoboda 145
 */
146
int program_create_loader(program_t *p)
147
{
148
    as_t *as;
149
    unsigned int rc;
150
    void *loader;
151
 
152
    as = as_create(0);
153
    ASSERT(as);
154
 
155
    loader = program_loader;
156
    if (!loader) return ENOENT;
157
 
158
    rc = elf_load((elf_header_t *) program_loader, as, ELD_F_LOADER);
159
    if (rc != EE_OK) {
160
        as_destroy(as);
161
        return ENOENT;
162
    }
163
 
164
    program_create(as, ((elf_header_t *) program_loader)->e_entry, p);
165
 
166
    return EOK;
167
}
168
 
3204 svoboda 169
/** Make program ready.
3203 svoboda 170
 *
3204 svoboda 171
 * Switch program's main thread to the ready state.
3203 svoboda 172
 *
3204 svoboda 173
 * @param p Program to make ready.
3203 svoboda 174
 */
175
void program_ready(program_t *p)
176
{
177
    thread_ready(p->main_thread);
178
}
179
 
3204 svoboda 180
/** Syscall for creating a new loader instance from userspace.
3203 svoboda 181
 *
182
 * Creates a new task from the program loader image, connects a phone
183
 * to it and stores the phone id into the provided buffer.
184
 *
185
 * @param uspace_phone_id Userspace address where to store the phone id.
186
 *
187
 * @return 0 on success or an error code from @ref errno.h.
188
 */
189
unative_t sys_program_spawn_loader(int *uspace_phone_id)
190
{
191
    program_t p;
192
    int fake_id;
193
    int rc;
194
    int phone_id;
195
 
196
    fake_id = 0;
197
 
198
    /* Before we even try creating the task, see if we can write the id */
199
    rc = (unative_t) copy_to_uspace(uspace_phone_id, &fake_id,
200
        sizeof(fake_id));
201
    if (rc != 0)
202
        return rc;
203
 
204
    phone_id = phone_alloc();
205
    if (phone_id < 0)
206
        return ELIMIT;
207
 
208
    rc = program_create_loader(&p);
209
    if (rc != 0)
210
        return rc;
211
 
212
    phone_connect(phone_id, &p.task->answerbox);
213
 
214
    /* No need to aquire lock before task_ready() */
215
    rc = (unative_t) copy_to_uspace(uspace_phone_id, &phone_id,
216
        sizeof(phone_id));
217
    if (rc != 0) {
218
        /* Ooops */
219
        ipc_phone_hangup(&TASK->phones[phone_id]);
220
        task_kill(p.task->taskid);
221
        return rc;
222
    }
223
 
224
    // FIXME: control the capabilities
225
    cap_set(p.task, cap_get(TASK));
226
 
227
    program_ready(&p);
228
 
229
    return EOK;
230
}
231
 
232
/** @}
233
 */