1 /*
2 * dlw_client.c
3 *
4 * RIDL implementation of client functions required by dynamic loader API.
5 * Please see list of client-required API functions in dload_api.h.
6 *
7 * This implementation of RIDL is expected to run on the DSP. It uses C6x
8 * RTS functions for file I/O and memory management (both host and target
9 * memory).
10 *
11 * A loader that runs on a GPP for the purposes of loading C6x code onto a
12 * DSP will likely need to re-write all of the functions contained in this
13 * module.
14 *
15 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 *
21 * Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 *
24 * Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the
27 * distribution.
28 *
29 * Neither the name of Texas Instruments Incorporated nor the names of
30 * its contributors may be used to endorse or promote products derived
31 * from this software without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
34 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
35 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
36 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
37 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
40 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
41 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
43 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 *
45 */
47 #include "types.h"
48 #include "ewrap.h"
49 #include "ArrayList.h"
50 #include "dload_api.h"
51 #include <stdarg.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include "file_ovr.h"
56 /* Eat printfs. */
57 #define printf mprintf
58 #define vprintf(x,y)
60 #if 0
61 #include "dlw_debug.h"
62 #include "dlw_dsbt.h"
63 #include "dlw_trgmem.h"
64 #endif
66 /*****************************************************************************/
67 /* Client Provided File I/O */
68 /*****************************************************************************/
69 /*****************************************************************************/
70 /* DLIF_FSEEK() - Seek to a position in specified file. */
71 /*****************************************************************************/
72 int DLIF_fseek(LOADER_FILE_DESC *stream, int32_t offset, int origin)
73 {
74 return fseek(stream, offset, origin);
75 }
77 /*****************************************************************************/
78 /* DLIF_FTELL() - Return the current position in the given file. */
79 /*****************************************************************************/
80 int32_t DLIF_ftell(LOADER_FILE_DESC *stream)
81 {
82 return ftell(stream);
83 }
85 /*****************************************************************************/
86 /* DLIF_FREAD() - Read data from file into a host-accessible data buffer */
87 /* that can be accessed through "ptr". */
88 /*****************************************************************************/
89 size_t DLIF_fread(void *ptr, size_t size, size_t nmemb,
90 LOADER_FILE_DESC *stream)
91 {
92 return fread(ptr, size, nmemb, stream);
93 }
95 /*****************************************************************************/
96 /* DLIF_FCLOSE() - Close a file that was opened on behalf of the core */
97 /* loader. Core loader has ownership of the file pointer, but client */
98 /* has access to file system. */
99 /*****************************************************************************/
100 int32_t DLIF_fclose(LOADER_FILE_DESC *fd)
101 {
102 return fclose(fd);
103 }
105 /*****************************************************************************/
106 /* Client Provided Host Memory Management */
107 /*****************************************************************************/
108 /*****************************************************************************/
109 /* DLIF_MALLOC() - Allocate host memory suitable for loader scratch space. */
110 /*****************************************************************************/
111 void* DLIF_malloc(size_t size)
112 {
113 return iblMalloc(size*sizeof(uint8_t));
114 }
116 /*****************************************************************************/
117 /* DLIF_FREE() - Free host memory previously allocated with DLIF_malloc(). */
118 /*****************************************************************************/
119 void DLIF_free(void* ptr)
120 {
121 iblFree(ptr);
122 }
124 /*****************************************************************************/
125 /* Client Provided Target Memory Management */
126 /*****************************************************************************/
128 /*****************************************************************************/
129 /* RIDL-Specific hack to facilitate target memory allocation. */
130 /*****************************************************************************/
131 /*****************************************************************************/
132 /* DLIF_ALLOCATE() - Return the load address of the segment/section */
133 /* described in its parameters and record the run address in */
134 /* run_address field of DLOAD_MEMORY_REQUEST. */
135 /*****************************************************************************/
136 BOOL DLIF_allocate(struct DLOAD_MEMORY_REQUEST *targ_req)
137 {
138 /*------------------------------------------------------------------------*/
139 /* Get pointers to API segment and file descriptors. */
140 /*------------------------------------------------------------------------*/
141 struct DLOAD_MEMORY_SEGMENT* obj_desc = targ_req->segment;
142 LOADER_FILE_DESC* f = targ_req->fp;
144 /*------------------------------------------------------------------------*/
145 /* Request target memory for this segment from the "blob". */
146 /*------------------------------------------------------------------------*/
147 if (!DLTMM_malloc(targ_req, obj_desc))
148 {
149 DLIF_error(DLET_MEMORY, "Failed to allocate target memory for segment.\n");
150 return 0;
151 }
153 /*------------------------------------------------------------------------*/
154 /* As required by API, copy the described segment into memory from file. */
155 /* We're the client, not the loader, so we can use fseek() and fread(). */
156 /*------------------------------------------------------------------------*/
157 /* ??? I don't think we want to do this if we are allocating target */
158 /* memory for the run only placement of this segment. If it is the */
159 /* load placement or both load and run placement, then we can do the */
160 /* copy. */
161 /*------------------------------------------------------------------------*/
162 memset(targ_req->host_address, 0, obj_desc->memsz_in_bytes);
163 fseek(f,targ_req->offset,SEEK_SET);
164 fread(targ_req->host_address,obj_desc->objsz_in_bytes,1,f);
166 /*------------------------------------------------------------------------*/
167 /* Once we have target address for this allocation, add debug information */
168 /* about this segment to the debug record for the module that is */
169 /* currently being loaded. */
170 /*------------------------------------------------------------------------*/
171 if (DLL_debug)
172 {
173 /*---------------------------------------------------------------------*/
174 /* Add information about this segment's location to the segment debug */
175 /* information associated with the module that is currently being */
176 /* loaded. */
177 /*---------------------------------------------------------------------*/
178 /* ??? We need a way to determine whether the target address in the */
179 /* segment applies to the load address of the segment or the */
180 /* run address. For the time being, we assume that it applies */
181 /* to both (that is, the dynamic loader does not support */
182 /* separate load and run placement for a given segment). */
183 /*---------------------------------------------------------------------*/
184 DLDBG_add_segment_record(obj_desc);
185 }
187 #if LOADER_DEBUG
188 if (debugging_on)
189 printf("DLIF_allocate: buffer 0x%x\n", targ_req->host_address);
190 #endif
192 /*------------------------------------------------------------------------*/
193 /* Target memory request was successful. */
194 /*------------------------------------------------------------------------*/
195 return 1;
196 }
198 /*****************************************************************************/
199 /* DLIF_RELEASE() - Unmap or free target memory that was previously */
200 /* allocated by DLIF_allocate(). */
201 /*****************************************************************************/
202 BOOL DLIF_release(struct DLOAD_MEMORY_SEGMENT* ptr)
203 {
204 #if LOADER_DEBUG
205 if (debugging_on)
206 printf("DLIF_free: %d bytes starting at 0x%x\n",
207 ptr->memsz_in_bytes, ptr->target_address);
208 #endif
210 /*------------------------------------------------------------------------*/
211 /* Find the target memory packet associated with this address and mark it */
212 /* as available (will also merge with adjacent free packets). */
213 /*------------------------------------------------------------------------*/
214 DLTMM_free(ptr->target_address);
216 return 1;
217 }
219 /*****************************************************************************/
220 /* DLIF_COPY() - Copy data from file to host-accessible memory. */
221 /* Returns a host pointer to the data in the host_address field of the */
222 /* DLOAD_MEMORY_REQUEST object. */
223 /*****************************************************************************/
224 BOOL DLIF_copy(struct DLOAD_MEMORY_REQUEST* targ_req)
225 {
226 targ_req->host_address = (void*)(targ_req->segment->target_address);
227 return 1;
228 }
230 /*****************************************************************************/
231 /* DLIF_READ() - Read content from target memory address into host- */
232 /* accessible buffer. */
233 /*****************************************************************************/
234 BOOL DLIF_read(void *ptr, size_t size, size_t nmemb, TARGET_ADDRESS src)
235 {
236 if (!memcpy(ptr, (const void *)src, size * nmemb))
237 return 0;
239 return 1;
240 }
242 /*****************************************************************************/
243 /* DLIF_WRITE() - Write updated (relocated) segment contents to target */
244 /* memory. */
245 /*****************************************************************************/
246 BOOL DLIF_write(struct DLOAD_MEMORY_REQUEST* req)
247 {
248 /*------------------------------------------------------------------------*/
249 /* Nothing to do since we are relocating directly into target memory. */
250 /*------------------------------------------------------------------------*/
251 return 1;
252 }
254 /*****************************************************************************/
255 /* DLIF_EXECUTE() - Transfer control to specified target address. */
256 /*****************************************************************************/
257 int32_t DLIF_execute(TARGET_ADDRESS exec_addr)
258 {
259 /*------------------------------------------------------------------------*/
260 /* This call will only work if the host and target are the same instance. */
261 /* The compiler may warn about this conversion from an object to a */
262 /* function pointer. */
263 /*------------------------------------------------------------------------*/
264 return ((int32_t(*)())(exec_addr))();
265 }
268 #if 0
269 /*****************************************************************************/
270 /* Client Provided Communication Mechanisms to assist with creation of */
271 /* DLLView debug information. Client needs to know exactly when a segment */
272 /* is being loaded or unloaded so that it can keep its debug information */
273 /* up to date. */
274 /*****************************************************************************/
275 /*****************************************************************************/
276 /* DLIF_LOAD_DEPENDENT() - Perform whatever maintenance is needed in the */
277 /* client when loading of a dependent file is initiated by the core */
278 /* loader. Open the dependent file on behalf of the core loader, */
279 /* then invoke the core loader to get it into target memory. The core */
280 /* loader assumes ownership of the dependent file pointer and must ask */
281 /* the client to close the file when it is no longer needed. */
282 /* */
283 /* If debug support is needed under the Braveheart model, then create */
284 /* a host version of the debug module record for this object. This */
285 /* version will get updated each time we allocate target memory for a */
286 /* segment that belongs to this module. When the load returns, the */
287 /* client will allocate memory for the debug module from target memory */
288 /* and write the host version of the debug module into target memory */
289 /* at the appropriate location. After this takes place the new debug */
290 /* module needs to be added to the debug module list. The client will */
291 /* need to update the tail of the DLModules list to link the new debug */
292 /* module onto the end of the list. */
293 /* */
294 /*****************************************************************************/
295 int DLIF_load_dependent(const char* so_name)
296 {
297 /*------------------------------------------------------------------------*/
298 /* Find the path and file name associated with the given so_name in the */
299 /* client's file registry. */
300 /*------------------------------------------------------------------------*/
301 /* If we can't find the so_name in the file registry (or if the registry */
302 /* is not implemented yet), we'll open the file using the so_name. */
303 /*------------------------------------------------------------------------*/
304 int to_ret = 0;
305 FILE* fp = fopen(so_name, "rb");
307 /*------------------------------------------------------------------------*/
308 /* We need to make sure that the file was properly opened. */
309 /*------------------------------------------------------------------------*/
310 if (!fp)
311 {
312 DLIF_error(DLET_FILE, "Can't open dependent file '%s'.\n", so_name);
313 return 0;
314 }
316 /*------------------------------------------------------------------------*/
317 /* If the dynamic loader is providing debug support for a DLL View plug- */
318 /* in or script of some sort, then we are going to create a host version */
319 /* of the debug module record for the so_name module. */
320 /*------------------------------------------------------------------------*/
321 /* In the Braveheart view of the world, debug support is only to be */
322 /* provided if the DLModules symbol is defined in the base image. */
323 /* We will set up a DLL_debug flag when the command to load the base */
324 /* image is issued. */
325 /*------------------------------------------------------------------------*/
326 if (DLL_debug)
327 DLDBG_add_host_record(so_name);
329 /*------------------------------------------------------------------------*/
330 /* Tell the core loader to proceed with loading the module. */
331 /*------------------------------------------------------------------------*/
332 /* Note that the client is turning ownership of the file pointer over to */
333 /* the core loader at this point. The core loader will need to ask the */
334 /* client to close the dependent file when it is done using the dependent */
335 /* file pointer. */
336 /*------------------------------------------------------------------------*/
337 to_ret = DLOAD_load(fp, 0, NULL);
339 /*------------------------------------------------------------------------*/
340 /* If the dependent load was successful, update the DLModules list in */
341 /* target memory as needed. */
342 /*------------------------------------------------------------------------*/
343 if (to_ret != 0)
344 {
345 /*---------------------------------------------------------------------*/
346 /* We will need to copy the information from our host version of the */
347 /* debug record into actual target memory. */
348 /*---------------------------------------------------------------------*/
349 if (DLL_debug)
350 {
351 /*---------------------------------------------------------------*/
352 /* Allocate target memory for the module's debug record. Use */
353 /* host version of the debug information to determine how much */
354 /* target memory we need and how it is to be filled in. */
355 /*---------------------------------------------------------------*/
356 /* Note that we don't go through the normal API functions to get */
357 /* target memory and write the debug information since we're not */
358 /* dealing with object file content here. The DLL View debug is */
359 /* supported entirely on the client side. */
360 /*---------------------------------------------------------------*/
361 DLDBG_add_target_record(to_ret);
362 }
363 }
365 /*------------------------------------------------------------------------*/
366 /* Report failure to load dependent. */
367 /*------------------------------------------------------------------------*/
368 else
369 DLIF_error(DLET_MISC, "Failed load of dependent file '%s'.\n", so_name);
371 return to_ret;
372 }
374 #endif
376 #if 0
377 /*****************************************************************************/
378 /* DLIF_UNLOAD_DEPENDENT() - Perform whatever maintenance is needed in the */
379 /* client when unloading of a dependent file is initiated by the core */
380 /* loader. Invoke the DLOAD_unload() function to get the core loader */
381 /* to release any target memory that is associated with the dependent */
382 /* file's segments. */
383 /*****************************************************************************/
384 void DLIF_unload_dependent(uint32_t handle)
385 {
386 /*------------------------------------------------------------------------*/
387 /* If the specified module is no longer needed, DLOAD_load() will spin */
388 /* through the object descriptors associated with the module and free up */
389 /* target memory that was allocated to any segment in the module. */
390 /*------------------------------------------------------------------------*/
391 /* If DLL debugging is enabled, find module debug record associated with */
392 /* this module and remove it from the DLL debug list. */
393 /*------------------------------------------------------------------------*/
394 if (DLOAD_unload(handle))
395 {
396 DSBT_release_entry(handle);
397 if (DLL_debug) DLDBG_rm_target_record(handle);
398 }
399 }
401 #endif
403 /*****************************************************************************/
404 /* Client Provided API Functions to Support Logging Warnings/Errors */
405 /*****************************************************************************/
407 /*****************************************************************************/
408 /* DLIF_WARNING() - Write out a warning message from the core loader. */
409 /*****************************************************************************/
410 void DLIF_warning(LOADER_WARNING_TYPE wtype, const char *fmt, ...)
411 {
412 va_list ap;
413 va_start(ap,fmt);
414 printf("<< D L O A D >> WARNING: ");
415 vprintf(fmt,ap);
416 va_end(ap);
417 }
419 /*****************************************************************************/
420 /* DLIF_ERROR() - Write out an error message from the core loader. */
421 /*****************************************************************************/
422 void DLIF_error(LOADER_ERROR_TYPE etype, const char *fmt, ...)
423 {
424 va_list ap;
425 va_start(ap,fmt);
426 printf("<< D L O A D >> ERROR: ");
427 vprintf(fmt,ap);
428 va_end(ap);
429 }
431 /*****************************************************************************
432 * END API FUNCTION DEFINITIONS
433 *****************************************************************************/