2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 1998 Michael Smith
6 * Copyright (c) 2020 NetApp Inc.
7 * Copyright (c) 2020 Klara Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/linker.h>
36 #include <sys/sysctl.h>
38 #include <machine/metadata.h>
41 #include <vm/vm_extern.h>
44 * Preloaded module support
47 vm_offset_t preload_addr_relocate = 0;
48 caddr_t preload_metadata;
51 * Search for the preloaded module (name)
54 preload_search_by_name(const char *name)
60 if (preload_metadata != NULL) {
61 curp = preload_metadata;
63 hdr = (uint32_t *)curp;
64 if (hdr[0] == 0 && hdr[1] == 0)
67 /* Search for a MODINFO_NAME field */
68 if ((hdr[0] == MODINFO_NAME) &&
69 !strcmp(name, curp + sizeof(uint32_t) * 2))
72 /* skip to next field */
73 next = sizeof(uint32_t) * 2 + hdr[1];
74 next = roundup(next, sizeof(u_long));
82 * Search for the first preloaded module of (type)
85 preload_search_by_type(const char *type)
91 if (preload_metadata != NULL) {
92 curp = preload_metadata;
95 hdr = (uint32_t *)curp;
96 if (hdr[0] == 0 && hdr[1] == 0)
99 /* remember the start of each record */
100 if (hdr[0] == MODINFO_NAME)
103 /* Search for a MODINFO_TYPE field */
104 if ((hdr[0] == MODINFO_TYPE) &&
105 !strcmp(type, curp + sizeof(uint32_t) * 2))
108 /* skip to next field */
109 next = sizeof(uint32_t) * 2 + hdr[1];
110 next = roundup(next, sizeof(u_long));
118 * Walk through the preloaded module list
121 preload_search_next_name(caddr_t base)
127 if (preload_metadata != NULL) {
128 /* Pick up where we left off last time */
130 /* skip to next field */
132 hdr = (uint32_t *)curp;
133 next = sizeof(uint32_t) * 2 + hdr[1];
134 next = roundup(next, sizeof(u_long));
137 curp = preload_metadata;
140 hdr = (uint32_t *)curp;
141 if (hdr[0] == 0 && hdr[1] == 0)
144 /* Found a new record? */
145 if (hdr[0] == MODINFO_NAME)
148 /* skip to next field */
149 next = sizeof(uint32_t) * 2 + hdr[1];
150 next = roundup(next, sizeof(u_long));
158 * Given a preloaded module handle (mod), return a pointer
159 * to the data for the attribute (inf).
162 preload_search_info(caddr_t mod, int inf)
174 hdr = (uint32_t *)curp;
175 /* end of module data? */
176 if (hdr[0] == 0 && hdr[1] == 0)
179 * We give up once we've looped back to what we were looking at
180 * first - this should normally be a MODINFO_NAME field.
190 * Attribute match? Return pointer to data.
191 * Consumer may safely assume that size value precedes
195 return(curp + (sizeof(uint32_t) * 2));
197 /* skip to next field */
198 next = sizeof(uint32_t) * 2 + hdr[1];
199 next = roundup(next, sizeof(u_long));
206 * Delete a preload record by name.
209 preload_delete_name(const char *name)
219 if (preload_metadata != NULL) {
221 curp = preload_metadata;
223 hdr = (uint32_t *)curp;
224 if (hdr[0] == MODINFO_NAME || (hdr[0] == 0 && hdr[1] == 0)) {
225 /* Free memory used to store the file. */
226 if (addr != 0 && sz != 0)
227 kmem_bootstrap_free((vm_offset_t)addr, sz);
233 if (!strcmp(name, curp + sizeof(uint32_t) * 2))
234 clearing = 1; /* got it, start clearing */
236 clearing = 0; /* at next one now.. better stop */
240 if (hdr[0] == MODINFO_ADDR)
241 addr = *(caddr_t *)(curp + sizeof(uint32_t) * 2);
242 else if (hdr[0] == MODINFO_SIZE)
243 sz = *(uint32_t *)(curp + sizeof(uint32_t) * 2);
244 hdr[0] = MODINFO_EMPTY;
247 /* skip to next field */
248 next = sizeof(uint32_t) * 2 + hdr[1];
249 next = roundup(next, sizeof(u_long));
256 preload_fetch_addr(caddr_t mod)
260 mdp = (caddr_t *)preload_search_info(mod, MODINFO_ADDR);
263 return (*mdp + preload_addr_relocate);
267 preload_fetch_size(caddr_t mod)
271 mdp = (size_t *)preload_search_info(mod, MODINFO_SIZE);
277 /* Called from locore. Convert physical pointers to kvm. Sigh. */
279 preload_bootstrap_relocate(vm_offset_t offset)
286 if (preload_metadata != NULL) {
287 curp = preload_metadata;
289 hdr = (uint32_t *)curp;
290 if (hdr[0] == 0 && hdr[1] == 0)
293 /* Deal with the ones that we know we have to fix */
296 case MODINFO_METADATA|MODINFOMD_FONT:
297 case MODINFO_METADATA|MODINFOMD_SSYM:
298 case MODINFO_METADATA|MODINFOMD_ESYM:
299 ptr = (vm_offset_t *)(curp + (sizeof(uint32_t) * 2));
303 /* The rest is beyond us for now */
305 /* skip to next field */
306 next = sizeof(uint32_t) * 2 + hdr[1];
307 next = roundup(next, sizeof(u_long));
314 * Parse the modinfo type and append to the provided sbuf.
317 preload_modinfo_type(struct sbuf *sbp, int type)
320 if ((type & MODINFO_METADATA) == 0) {
323 sbuf_cat(sbp, "MODINFO_END");
326 sbuf_cat(sbp, "MODINFO_NAME");
329 sbuf_cat(sbp, "MODINFO_TYPE");
332 sbuf_cat(sbp, "MODINFO_ADDR");
335 sbuf_cat(sbp, "MODINFO_SIZE");
338 sbuf_cat(sbp, "MODINFO_EMPTY");
341 sbuf_cat(sbp, "MODINFO_ARGS");
344 sbuf_cat(sbp, "unrecognized modinfo attribute");
350 sbuf_cat(sbp, "MODINFO_METADATA | ");
351 switch (type & ~MODINFO_METADATA) {
352 case MODINFOMD_ELFHDR:
353 sbuf_cat(sbp, "MODINFOMD_ELFHDR");
356 sbuf_cat(sbp, "MODINFOMD_SSYM");
359 sbuf_cat(sbp, "MODINFOMD_ESYM");
361 case MODINFOMD_DYNAMIC:
362 sbuf_cat(sbp, "MODINFOMD_DYNAMIC");
365 sbuf_cat(sbp, "MODINFOMD_ENVP");
367 case MODINFOMD_HOWTO:
368 sbuf_cat(sbp, "MODINFOMD_HOWTO");
370 case MODINFOMD_KERNEND:
371 sbuf_cat(sbp, "MODINFOMD_KERNEND");
374 sbuf_cat(sbp, "MODINFOMD_SHDR");
376 case MODINFOMD_CTORS_ADDR:
377 sbuf_cat(sbp, "MODINFOMD_CTORS_ADDR");
379 case MODINFOMD_CTORS_SIZE:
380 sbuf_cat(sbp, "MODINFOMD_CTORS_SIZE");
382 case MODINFOMD_FW_HANDLE:
383 sbuf_cat(sbp, "MODINFOMD_FW_HANDLE");
385 case MODINFOMD_KEYBUF:
386 sbuf_cat(sbp, "MODINFOMD_KEYBUF");
388 #ifdef MODINFOMD_SMAP
390 sbuf_cat(sbp, "MODINFOMD_SMAP");
393 #ifdef MODINFOMD_SMAP_XATTR
394 case MODINFOMD_SMAP_XATTR:
395 sbuf_cat(sbp, "MODINFOMD_SMAP_XATTR");
398 #ifdef MODINFOMD_DTBP
400 sbuf_cat(sbp, "MODINFOMD_DTBP");
403 #ifdef MODINFOMD_EFI_MAP
404 case MODINFOMD_EFI_MAP:
405 sbuf_cat(sbp, "MODINFOMD_EFI_MAP");
408 #ifdef MODINFOMD_EFI_FB
409 case MODINFOMD_EFI_FB:
410 sbuf_cat(sbp, "MODINFOMD_EFI_FB");
413 #ifdef MODINFOMD_MODULEP
414 case MODINFOMD_MODULEP:
415 sbuf_cat(sbp, "MODINFOMD_MODULEP");
418 #ifdef MODINFOMD_VBE_FB
419 case MODINFOMD_VBE_FB:
420 sbuf_cat(sbp, "MODINFOMD_VBE_FB");
423 #ifdef MODINFOMD_FONT
425 sbuf_cat(sbp, "MODINFOMD_FONT");
429 sbuf_cat(sbp, "unrecognized metadata type");
434 * Print the modinfo value, depending on type.
437 preload_modinfo_value(struct sbuf *sbp, uint32_t *bptr, int type, int len)
440 #define sbuf_print_vmoffset(sb, o) sbuf_printf(sb, "0x%016lx", o);
442 #define sbuf_print_vmoffset(sb, o) sbuf_printf(sb, "0x%08x", o);
449 sbuf_printf(sbp, "%s", (char *)bptr);
452 case MODINFO_METADATA | MODINFOMD_CTORS_SIZE:
453 sbuf_printf(sbp, "%lu", *(u_long *)bptr);
456 case MODINFO_METADATA | MODINFOMD_SSYM:
457 case MODINFO_METADATA | MODINFOMD_ESYM:
458 case MODINFO_METADATA | MODINFOMD_DYNAMIC:
459 case MODINFO_METADATA | MODINFOMD_KERNEND:
460 case MODINFO_METADATA | MODINFOMD_ENVP:
461 case MODINFO_METADATA | MODINFOMD_CTORS_ADDR:
462 #ifdef MODINFOMD_SMAP
463 case MODINFO_METADATA | MODINFOMD_SMAP:
465 #ifdef MODINFOMD_SMAP_XATTR
466 case MODINFO_METADATA | MODINFOMD_SMAP_XATTR:
468 #ifdef MODINFOMD_DTBP
469 case MODINFO_METADATA | MODINFOMD_DTBP:
471 #ifdef MODINFOMD_EFI_FB
472 case MODINFO_METADATA | MODINFOMD_EFI_FB:
474 #ifdef MODINFOMD_VBE_FB
475 case MODINFO_METADATA | MODINFOMD_VBE_FB:
477 #ifdef MODINFOMD_FONT
478 case MODINFO_METADATA | MODINFOMD_FONT:
480 sbuf_print_vmoffset(sbp, *(vm_offset_t *)bptr);
482 case MODINFO_METADATA | MODINFOMD_HOWTO:
483 sbuf_printf(sbp, "0x%08x", *bptr);
485 case MODINFO_METADATA | MODINFOMD_SHDR:
486 case MODINFO_METADATA | MODINFOMD_ELFHDR:
487 case MODINFO_METADATA | MODINFOMD_FW_HANDLE:
488 case MODINFO_METADATA | MODINFOMD_KEYBUF:
489 #ifdef MODINFOMD_EFI_MAP
490 case MODINFO_METADATA | MODINFOMD_EFI_MAP:
492 /* Don't print data buffers. */
493 sbuf_cat(sbp, "buffer contents omitted");
498 #undef sbuf_print_vmoffset
502 preload_dump_internal(struct sbuf *sbp)
504 uint32_t *bptr, type, len;
506 KASSERT(preload_metadata != NULL,
507 ("%s called without setting up preload_metadata", __func__));
510 * Iterate through the TLV-encoded sections.
512 bptr = (uint32_t *)preload_metadata;
513 sbuf_putc(sbp, '\n');
514 while (bptr[0] != MODINFO_END || bptr[1] != MODINFO_END) {
515 sbuf_printf(sbp, " %p:\n", bptr);
519 sbuf_printf(sbp, "\ttype:\t(%#04x) ", type);
520 preload_modinfo_type(sbp, type);
521 sbuf_putc(sbp, '\n');
522 sbuf_printf(sbp, "\tlen:\t%u\n", len);
523 sbuf_cat(sbp, "\tvalue:\t");
524 preload_modinfo_value(sbp, bptr, type, len);
525 sbuf_putc(sbp, '\n');
527 bptr += roundup(len, sizeof(u_long)) / sizeof(uint32_t);
532 * Print the preloaded data to the console. Called from the machine-dependent
533 * initialization routines, e.g. hammer_time().
542 * This function is expected to be called before malloc is available,
543 * so use a static buffer and struct sbuf.
545 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
546 sbuf_set_drain(&sb, sbuf_printf_drain, NULL);
547 preload_dump_internal(&sb);
554 sysctl_preload_dump(SYSCTL_HANDLER_ARGS)
559 if (preload_metadata == NULL)
562 sbuf_new_for_sysctl(&sb, NULL, 512, req);
563 preload_dump_internal(&sb);
565 error = sbuf_finish(&sb);
570 SYSCTL_PROC(_debug, OID_AUTO, dump_modinfo,
571 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
572 NULL, 0, sysctl_preload_dump, "A",
573 "pretty-print the bootloader metadata");