[coreboot-gerrit] Patch set updated for coreboot: ensure correct byte ordering for cbfs segment list
George Trudeau (george.trudeau@usherbrooke.ca)
gerrit at coreboot.org
Mon Apr 18 23:41:22 CEST 2016
George Trudeau (george.trudeau at usherbrooke.ca) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14294
-gerrit
commit f2cb9562cfee1643675fec2281122b4108a201c7
Author: George Trudeau <george.trudeau at usherbrooke.ca>
Date: Mon Apr 4 00:19:02 2016 -0400
ensure correct byte ordering for cbfs segment list
Decode each cbfs_payload_segment into native byte order during
segments iteration.
Note :
List ordering has been changed, segments are now always inserted
at the end.
Change-Id: Icb3c6a7da2d253685a3bc157bc7f5a51183c9652
Signed-off-by: George Trudeau <george.trudeau at usherbrooke.ca>
---
src/lib/selfboot.c | 95 +++++++++++++++++++++++++++++++-----------------------
1 file changed, 55 insertions(+), 40 deletions(-)
diff --git a/src/lib/selfboot.c b/src/lib/selfboot.c
index 23eda14..75d6725 100644
--- a/src/lib/selfboot.c
+++ b/src/lib/selfboot.c
@@ -3,6 +3,7 @@
*
* Copyright (C) 2003 Eric W. Biederman <ebiederm at xmission.com>
* Copyright (C) 2009 Ron Minnich <rminnich at gmail.com>
+ * Copyright (C) 2016 George Trudeau <george.trudeau at usherbrooke.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -15,9 +16,9 @@
*/
#include <commonlib/compression.h>
+#include <commonlib/endian.h>
#include <console/console.h>
#include <cpu/cpu.h>
-#include <endian.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
@@ -209,68 +210,89 @@ static int relocate_segment(unsigned long buffer, struct segment *seg)
return ret;
}
+/* Decode a serialized cbfs payload segment
+ * from memory into native endianness.
+ */
+static void cbfs_decode_payload_segment(struct cbfs_payload_segment *segment,
+ const struct cbfs_payload_segment *src)
+{
+ segment->type = read_be32(&src->type);
+ segment->compression = read_be32(&src->compression);
+ segment->offset = read_be32(&src->offset);
+ segment->load_addr = read_be64(&src->load_addr);
+ segment->len = read_be32(&src->len);
+ segment->mem_len = read_be32(&src->mem_len);
+}
static int build_self_segment_list(
struct segment *head,
struct cbfs_payload *cbfs_payload, uintptr_t *entry)
{
struct segment *new;
- struct segment *ptr;
- struct cbfs_payload_segment *segment, *first_segment;
+ struct cbfs_payload_segment *current_segment, *first_segment, segment;
+
memset(head, 0, sizeof(*head));
head->next = head->prev = head;
- first_segment = segment = &cbfs_payload->segments;
- while(1) {
- printk(BIOS_DEBUG, "Loading segment from rom address 0x%p\n", segment);
- switch(segment->type) {
+ first_segment = &cbfs_payload->segments;
+
+ for (current_segment = first_segment;; ++current_segment) {
+ printk(BIOS_DEBUG,
+ "Loading segment from rom address 0x%p\n",
+ current_segment);
+
+ cbfs_decode_payload_segment(&segment, current_segment);
+
+ switch (segment.type) {
case PAYLOAD_SEGMENT_PARAMS:
printk(BIOS_DEBUG, " parameter section (skipped)\n");
- segment++;
continue;
case PAYLOAD_SEGMENT_CODE:
case PAYLOAD_SEGMENT_DATA:
printk(BIOS_DEBUG, " %s (compression=%x)\n",
- segment->type == PAYLOAD_SEGMENT_CODE ? "code" : "data",
- ntohl(segment->compression));
- new = malloc(sizeof(*new));
- new->s_dstaddr = ntohll(segment->load_addr);
- new->s_memsz = ntohl(segment->mem_len);
- new->compression = ntohl(segment->compression);
+ segment.type == PAYLOAD_SEGMENT_CODE
+ ? "code" : "data", segment.compression);
+ new = malloc(sizeof(*new));
+ new->s_dstaddr = segment.load_addr;
+ new->s_memsz = segment.mem_len;
+ new->compression = segment.compression;
new->s_srcaddr = (uintptr_t)
((unsigned char *)first_segment)
- + ntohl(segment->offset);
- new->s_filesz = ntohl(segment->len);
+ + segment.offset;
+ new->s_filesz = segment.len;
+
printk(BIOS_DEBUG, " New segment dstaddr 0x%lx memsize 0x%lx srcaddr 0x%lx filesize 0x%lx\n",
new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
+
/* Clean up the values */
if (new->s_filesz > new->s_memsz) {
new->s_filesz = new->s_memsz;
printk(BIOS_DEBUG,
- " cleaned up filesize 0x%lx\n",
- new->s_filesz);
+ " cleaned up filesize 0x%lx\n",
+ new->s_filesz);
}
break;
case PAYLOAD_SEGMENT_BSS:
printk(BIOS_DEBUG, " BSS 0x%p (%d byte)\n", (void *)
- (intptr_t)ntohll(segment->load_addr),
- ntohl(segment->mem_len));
+ (intptr_t)segment.load_addr, segment.mem_len);
+
new = malloc(sizeof(*new));
new->s_filesz = 0;
new->s_srcaddr = (uintptr_t)
((unsigned char *)first_segment)
- + ntohl(segment->offset);
- new->s_dstaddr = ntohll(segment->load_addr);
- new->s_memsz = ntohl(segment->mem_len);
+ + segment.offset;
+ new->s_dstaddr = segment.load_addr;
+ new->s_memsz = segment.mem_len;
break;
case PAYLOAD_SEGMENT_ENTRY:
- printk(BIOS_DEBUG, " Entry Point 0x%p\n",
- (void *)(intptr_t)ntohll(segment->load_addr));
- *entry = ntohll(segment->load_addr);
+ printk(BIOS_DEBUG, " Entry Point 0x%p\n", (void *)
+ (intptr_t)segment.load_addr);
+
+ *entry = segment.load_addr;
/* Per definition, a payload always has the entry point
* as last segment. Thus, we use the occurrence of the
* entry point as break condition for the loop.
@@ -282,24 +304,17 @@ static int build_self_segment_list(
/* We found something that we don't know about. Throw
* hands into the sky and run away!
*/
- printk(BIOS_EMERG, "Bad segment type %x\n", segment->type);
+ printk(BIOS_EMERG, "Bad segment type %x\n",
+ segment.type);
return -1;
}
/* We have found another CODE, DATA or BSS segment */
- segment++;
-
- /* Find place where to insert our segment */
- for(ptr = head->next; ptr != head; ptr = ptr->next) {
- if (new->s_srcaddr < ntohll(segment->load_addr))
- break;
- }
-
- /* Order by stream offset */
- new->next = ptr;
- new->prev = ptr->prev;
- ptr->prev->next = new;
- ptr->prev = new;
+ /* Insert new segment at the end of the list */
+ new->next = head;
+ new->prev = head->prev;
+ head->prev->next = new;
+ head->prev = new;
}
return 1;
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