A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2010 by Thomas Martitz
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21
22#include "config.h"
23#include "system.h"
24#include "kernel.h"
25#include "file.h"
26#include "debug.h"
27#include "load_code.h"
28
29/* load binary blob from disk to memory, returning a handle */
30void * lc_open(const char *filename, unsigned char *buf, size_t buf_size)
31{
32 int fd = open(filename, O_RDONLY);
33 ssize_t read_size;
34 struct lc_header hdr;
35 unsigned char *buf_end = buf+buf_size;
36 off_t copy_size;
37
38 if (fd < 0)
39 {
40 DEBUGF("Could not open file");
41 goto error;
42 }
43
44#if NUM_CORES > 1
45 /* Make sure COP cache is flushed and invalidated before loading */
46 {
47 int my_core = switch_core(CURRENT_CORE ^ 1);
48 switch_core(my_core);
49 }
50#endif
51
52 /* read the header to obtain the load address */
53 read_size = read(fd, &hdr, sizeof(hdr));
54
55 if (read_size < 0)
56 {
57 DEBUGF("Could not read from file");
58 goto error_fd;
59 }
60
61 /* hdr.end_addr points to the end of the bss section,
62 * but there might be idata/icode behind that so the bytes to copy
63 * can be larger */
64 copy_size = MAX(filesize(fd), hdr.end_addr - hdr.load_addr);
65
66 if (hdr.load_addr < buf || (hdr.load_addr+copy_size) > buf_end)
67 {
68 DEBUGF("Binary doesn't fit into memory");
69 goto error_fd;
70 }
71
72 /* go back to beginning to load the whole thing (incl. header) */
73 if (lseek(fd, 0, SEEK_SET) < 0)
74 {
75 DEBUGF("lseek failed");
76 goto error_fd;
77 }
78
79 /* the header has the addresses where the code is linked at */
80 read_size = read(fd, hdr.load_addr, copy_size);
81 close(fd);
82
83 if (read_size < 0)
84 {
85 DEBUGF("Could not read from file");
86 goto error;
87 }
88
89 /* commit dcache and discard icache */
90 commit_discard_idcache();
91 /* return a pointer the header, reused by lc_get_header() */
92 return hdr.load_addr;
93
94error_fd:
95 close(fd);
96error:
97 return NULL;
98}