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Extend lc_open() to also being able to load overlay plugins.

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For this it needs to look at the plugin header. Since lc_open() doesn't know
it's a plugin, the header needs to be changed slightly to include the new lc_header (which needs to be the first element in plugin_header so it can be casted savely).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28054 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-09-09 16:17:21 +00:00
parent cec7c99613
commit 0d4585b28f
10 changed files with 167 additions and 105 deletions
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27
firmware/export/load_code.h
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@ -20,17 +20,21 @@
****************************************************************************/
#ifndef __LOAD_CODE_H__
#define __LOAD_CODE_H__
#include "config.h"
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
#include "system.h"
extern void *lc_open(const char *filename, char *buf, size_t buf_size);
extern void *lc_open(const char *filename, unsigned char *buf, size_t buf_size);
/* header is always at the beginning of the blob, and handle actually points
* to the start of the blob */
* to the start of the blob (the header is there) */
static inline void *lc_open_from_mem(void* addr, size_t blob_size)
{
(void)blob_size;
/* commit dcache and discard icache */
cpucache_invalidate();
return addr;
}
@ -48,14 +52,27 @@ static inline void lc_close(void *handle) { (void)handle; }
#else
#define _lc_open_char char
#endif
extern void *_lc_open(const _lc_open_char *filename, char *buf, size_t buf_size);
extern void *_lc_open(const _lc_open_char *filename, unsigned char *buf, size_t buf_size);
extern void *_lc_get_header(void *handle);
extern void _lc_close(void *handle);
extern void *lc_open(const char *filename, char *buf, size_t buf_size);
/* not possiible on hosted platforms */
extern void *lc_open(const char *filename, unsigned char *buf, size_t buf_size);
extern void *lc_open_from_mem(void *addr, size_t blob_size);
extern void *lc_get_header(void *handle);
extern void lc_close(void *handle);
extern const char* lc_last_error(void);
#endif
/* this struct needs to be the first part of other headers
* (lc_open() casts the other header to this one to load to the correct
* address)
*/
struct lc_header {
unsigned long magic;
unsigned short target_id;
unsigned short api_version;
unsigned char *load_addr;
unsigned char *end_addr;
};
#endif /* __LOAD_CODE_H__ */