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-rw-r--r--src/boot/elfboot.c8
-rw-r--r--src/boot/selfboot.c98
2 files changed, 57 insertions, 49 deletions
diff --git a/src/boot/elfboot.c b/src/boot/elfboot.c
index e633962799..958112d669 100644
--- a/src/boot/elfboot.c
+++ b/src/boot/elfboot.c
@@ -107,11 +107,11 @@ int verify_ip_checksum(
* a machine, and implementing general relocation is hard.
*
* The solution:
- * - Allocate a buffer twice the size of the coreboot image.
- * - Anything that would overwrite coreboot copy into the lower half of
+ * - Allocate a buffer the size of the coreboot image plus additional
+ * required space.
+ * - Anything that would overwrite coreboot copy into the lower part of
* the buffer.
- * - After loading an ELF image copy coreboot to the upper half of the
- * buffer.
+ * - After loading an ELF image copy coreboot to the top of the buffer.
* - Then jump to the loaded image.
*
* Benefits:
diff --git a/src/boot/selfboot.c b/src/boot/selfboot.c
index faeadba0f0..254c131a53 100644
--- a/src/boot/selfboot.c
+++ b/src/boot/selfboot.c
@@ -74,15 +74,13 @@ struct ip_checksum_vcb {
void * cbfs_load_payload(struct lb_memory *lb_mem, const char *name)
{
int selfboot(struct lb_memory *mem, struct cbfs_payload *payload);
- struct cbfs_payload *payload = (struct cbfs_payload *)
- cbfs_find_file(name, CBFS_TYPE_PAYLOAD);
-
- struct cbfs_payload_segment *segment, *first_segment;
+ struct cbfs_payload *payload;
+ payload = (struct cbfs_payload *)cbfs_find_file(name, CBFS_TYPE_PAYLOAD);
if (payload == NULL)
return (void *) -1;
printk_debug("Got a payload\n");
- first_segment = segment = &payload->segments;
+
selfboot(lb_mem, payload);
printk_emerg("SELFBOOT RETURNED!\n");
@@ -95,11 +93,11 @@ void * cbfs_load_payload(struct lb_memory *lb_mem, const char *name)
* a machine, and implementing general relocation is hard.
*
* The solution:
- * - Allocate a buffer twice the size of the coreboot image.
- * - Anything that would overwrite coreboot copy into the lower half of
+ * - Allocate a buffer the size of the coreboot image plus additional
+ * required space.
+ * - Anything that would overwrite coreboot copy into the lower part of
* the buffer.
- * - After loading an ELF image copy coreboot to the upper half of the
- * buffer.
+ * - After loading an ELF image copy coreboot to the top of the buffer.
* - Then jump to the loaded image.
*
* Benefits:
@@ -270,9 +268,9 @@ static void relocate_segment(unsigned long buffer, struct segment *seg)
new->s_dstaddr,
new->s_dstaddr + new->s_filesz,
new->s_dstaddr + new->s_memsz);
- }
+ }
- /* Slice off a piece at the end
+ /* Slice off a piece at the end
* that doesn't conflict with coreboot
*/
if (end > lb_end) {
@@ -301,16 +299,13 @@ static void relocate_segment(unsigned long buffer, struct segment *seg)
seg->phdr_next->phdr_prev = new;
seg->phdr_next = new;
- /* compute the new value of end */
- end = start + len;
-
printk_spew(" late: [0x%016lx, 0x%016lx, 0x%016lx)\n",
new->s_dstaddr,
new->s_dstaddr + new->s_filesz,
new->s_dstaddr + new->s_memsz);
-
}
}
+
/* Now retarget this segment onto the bounce buffer */
/* sort of explanation: the buffer is a 1:1 mapping to coreboot.
* so you will make the dstaddr be this buffer, and it will get copied
@@ -332,7 +327,6 @@ static int build_self_segment_list(
{
struct segment *new;
struct segment *ptr;
- int datasize;
struct cbfs_payload_segment *segment, *first_segment;
memset(head, 0, sizeof(*head));
head->phdr_next = head->phdr_prev = head;
@@ -340,66 +334,82 @@ static int build_self_segment_list(
first_segment = segment = &payload->segments;
while(1) {
- printk_debug("Segment %p\n", segment);
+ printk_debug("Loading segment from rom address 0x%p\n", segment);
switch(segment->type) {
- default: printk_emerg("Bad segment type %x\n", segment->type);
- return -1;
case PAYLOAD_SEGMENT_PARAMS:
- printk_info("found param section\n");
+ printk_debug(" parameter section (skipped)\n");
segment++;
continue;
+
case PAYLOAD_SEGMENT_CODE:
case PAYLOAD_SEGMENT_DATA:
- printk_info( "%s: ", segment->type == PAYLOAD_SEGMENT_CODE ?
- "code" : "data");
- new = malloc(sizeof(*new));
- new->s_dstaddr = ntohl((u32) segment->load_addr);
- new->s_memsz = ntohl(segment->mem_len);
- new->compression = ntohl(segment->compression);
-
- datasize = ntohl(segment->len);
- new->s_srcaddr = (u32) ((unsigned char *) first_segment) + ntohl(segment->offset);
- new->s_filesz = ntohl(segment->len);
- printk_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_debug("(cleaned up) New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
- new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
- break;
+ printk_debug(" %s (compression=%x)\n",
+ segment->type == PAYLOAD_SEGMENT_CODE ? "code" : "data",
+ ntohl(segment->compression));
+ new = malloc(sizeof(*new));
+ new->s_dstaddr = ntohl((u32) segment->load_addr);
+ new->s_memsz = ntohl(segment->mem_len);
+ new->compression = ntohl(segment->compression);
+
+ new->s_srcaddr = (u32) ((unsigned char *) first_segment) + ntohl(segment->offset);
+ new->s_filesz = ntohl(segment->len);
+ printk_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_debug(" (cleaned up) New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
+ new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
+ break;
+
case PAYLOAD_SEGMENT_BSS:
- printk_info("BSS %p/%d\n", (void *) ntohl((u32) segment->load_addr),
+ printk_debug(" BSS 0x%p (%d byte)\n", (void *) ntohl((u32) segment->load_addr),
ntohl(segment->mem_len));
new = malloc(sizeof(*new));
new->s_filesz = 0;
new->s_dstaddr = ntohl((u32) segment->load_addr);
new->s_memsz = ntohl(segment->mem_len);
-
break;
case PAYLOAD_SEGMENT_ENTRY:
- printk_info("Entry %p\n", (void *) ntohl((u32) segment->load_addr));
+ printk_debug(" Entry Point 0x%p\n", (void *) ntohl((u32) segment->load_addr));
*entry = ntohl((u32) segment->load_addr);
+ /* Per definition, a payload always has the entry point
+ * as last segment. Thus, we use the occurence of the
+ * entry point as break condition for the loop.
+ * Can we actually just look at the number of section?
+ */
return 1;
+
+ default:
+ /* We found something that we don't know about. Throw
+ * hands into the sky and run away!
+ */
+ printk_emerg("Bad segment type %x\n", segment->type);
+ return -1;
}
+
segment++;
+
for(ptr = head->next; ptr != head; ptr = ptr->next) {
if (new->s_srcaddr < ntohl((u32) segment->load_addr))
break;
}
+
/* Order by stream offset */
new->next = ptr;
new->prev = ptr->prev;
ptr->prev->next = new;
ptr->prev = new;
+
/* Order by original program header order */
new->phdr_next = head;
new->phdr_prev = head->phdr_prev;
head->phdr_prev->phdr_next = new;
head->phdr_prev = new;
}
+
return 1;
}
@@ -408,10 +418,8 @@ static int load_self_segments(
struct lb_memory *mem,
struct cbfs_payload *payload)
{
- unsigned long offset;
struct segment *ptr;
- offset = 0;
unsigned long required_bounce_size = lb_end - lb_start;
for(ptr = head->next; ptr != head; ptr = ptr->next) {
if (!overlaps_coreboot(ptr)) continue;
@@ -429,7 +437,7 @@ static int load_self_segments(
return 0;
}
for(ptr = head->next; ptr != head; ptr = ptr->next) {
- unsigned char *dest,*src;
+ unsigned char *dest, *src;
printk_debug("Loading Segment: addr: 0x%016lx memsz: 0x%016lx filesz: 0x%016lx\n",
ptr->s_dstaddr, ptr->s_memsz, ptr->s_filesz);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 07:11:10 +0000