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Restructured to allow per-object image formats

This commit is contained in:
Michael Brown 2005-05-17 13:40:31 +00:00
parent 7205f0846c
commit 510de6cb8c

View File

@ -29,351 +29,71 @@ Modifications: Ken Yap (for Etherboot/16)
* your option) any later version.
*/
#include "etherboot.h"
#include "io.h"
#include "heap.h"
#include "memsizes.h"
#ifdef KEEP_IT_REAL
/* Linker symbols */
extern char _text[];
extern char _end[];
#warning "All download mechanisms are broken under KEEP_IT_REAL"
os_download_t probe_image(unsigned char *data, unsigned int len) {
return 0;
}
int load_block(unsigned char *data, unsigned int block, unsigned int len, int eof) {
return 1;
}
#else /* KEEP_IT_REAL */
struct os_entry_regs os_regs;
static struct ebinfo loaderinfo = {
VERSION_MAJOR, VERSION_MINOR,
0
};
#define LOAD_DEBUG 0
static int prep_segment(unsigned long start, unsigned long mid, unsigned long end,
unsigned long istart, unsigned long iend);
static unsigned long find_segment(unsigned long size, unsigned long align);
static sector_t dead_download ( unsigned char *data, unsigned int len, int eof);
static void done(int do_cleanup);
#if defined(IMAGE_FREEBSD) && defined(ELF_IMAGE)
static void elf_freebsd_probe(void);
static void elf_freebsd_fixup_segment(void);
static void elf_freebsd_find_segment_end(void);
static int elf_freebsd_debug_loader(unsigned int offset);
static void elf_freebsd_boot(unsigned long entry);
#else
#define elf_freebsd_probe() do {} while(0)
#define elf_freebsd_fixup_segment() do {} while(0)
#define elf_freebsd_find_segment_end() do {} while(0)
#define elf_freebsd_debug_loader(off) (0)
#define elf_freebsd_boot(entry) do {} while(0)
#endif
#if defined(IMAGE_FREEBSD) && defined(AOUT_IMAGE)
static void aout_freebsd_probe(void);
static void aout_freebsd_boot(void);
#else
#define aout_freebsd_probe() do {} while(0)
#define aout_freebsd_boot() do {} while(0)
#endif
/**************************************************************************
dead_download - Restart etherboot if probe image fails
**************************************************************************/
static sector_t dead_download ( unsigned char *data __unused, unsigned int len __unused, int eof __unused) {
longjmp(restart_etherboot, -2);
}
#ifdef IMAGE_MULTIBOOT
#include "../arch/i386/core/multiboot_loader.c"
#else
#define multiboot_probe(data, len) do {} while(0)
#define multiboot_boot(entry) do {} while(0)
#endif
#ifdef WINCE_IMAGE
#include "../arch/i386/core/wince_loader.c"
#endif
#ifdef AOUT_IMAGE
#include "../arch/i386/core/aout_loader.c"
#endif
#ifdef TAGGED_IMAGE
#include "../arch/i386/core/tagged_loader.c"
#endif
#if defined(ELF_IMAGE) || defined(ELF64_IMAGE)
#include "elf_loader.c"
#endif
#if defined(COFF_IMAGE)
#include "../arch/e1/core/coff_loader.c"
#endif
#ifdef IMAGE_FREEBSD
#include "../arch/i386/core/freebsd_loader.c"
#endif
#ifdef PXE_IMAGE
#include "../arch/i386/core/pxe_loader.c"
#endif
#ifdef RAW_IMAGE
#include "../arch/armnommu/core/raw_loader.c"
#endif
static void done(int do_cleanup)
{
#ifdef SIZEINDICATOR
printf("K ");
#endif
printf("done\n");
/* We may not want to do the cleanup: when booting a PXE
* image, for example, we need to leave the network card
* enabled, and it helps debugging if the serial console
* remains enabled. The call the cleanup() will be triggered
* when the PXE stack is shut down.
*/
if ( do_cleanup ) {
cleanup();
/* arch_on_exit(0); */
}
}
static int prep_segment(unsigned long start, unsigned long mid, unsigned long end,
unsigned long istart __unused, unsigned long iend __unused)
{
int prep_segment ( physaddr_t start, physaddr_t mid, physaddr_t end ) {
unsigned fit, i;
#if LOAD_DEBUG
printf ( "\nAbout to prepare segment [%lX,%lX)\n", start, end );
sleep ( 3 );
#endif
DBG ( "OSLOADER preparing segment [%lX,%lX)\n", start, end );
if (mid > end) {
printf("filesz > memsz\n");
if ( mid > end ) {
DBG ( "OSLOADER got filesz > memsz\n" );
return 0;
}
if ((end > virt_to_phys(_text)) &&
(start < virt_to_phys(_end))) {
printf("segment [%lX, %lX) overlaps etherboot [%lX, %lX)\n",
start, end,
virt_to_phys(_text), virt_to_phys(_end)
);
/* Check for overlap with Etherboot runtime image */
if ( ( end > virt_to_phys ( _text ) ) &&
( start < virt_to_phys ( _end ) ) ) {
DBG ( "OSLOADER got segment [%lX, %lX) "
"overlapping etherboot [%lX, %lX)\n",
start, end,
virt_to_phys ( _text ), virt_to_phys ( _end ) );
return 0;
}
if ((end > heap_ptr) && (start < heap_bot)) {
printf("segment [%lX, %lX) overlaps heap [%lX, %lX)\n",
start, end,
heap_ptr, heap_bot
);
/* Check for overlap with used portion of heap. Since the
* heap code just finds the biggest available memory area, we
* check only against the used heap area, rather than the
* whole heap area.
*/
if ( ( end > heap_ptr ) && ( start < heap_end ) ) {
DBG ( "OSLOADER got segment [%lX, %lX) "
"overlapping used heap [%lX, %lX)\n",
start, end, heap_ptr, heap_end );
return 0;
}
/* Check that block fits entirely inside a single memory region */
fit = 0;
for(i = 0; i < meminfo.map_count; i++) {
for ( i = 0 ; i < meminfo.map_count ; i++ ) {
unsigned long long r_start, r_end;
if (meminfo.map[i].type != E820_RAM)
continue;
r_start = meminfo.map[i].addr;
r_end = r_start + meminfo.map[i].size;
if ((start >= r_start) && (end <= r_end)) {
if ( ( start >= r_start ) && ( end <= r_end ) ) {
fit = 1;
break;
}
}
if (!fit) {
printf("\nsegment [%lX,%lX) does not fit in any memory region\n",
start, end);
#if LOAD_DEBUG
printf("Memory regions(%d):\n", meminfo.map_count);
for(i = 0; i < meminfo.map_count; i++) {
unsigned long long r_start, r_end;
if (meminfo.map[i].type != E820_RAM)
continue;
r_start = meminfo.map[i].addr;
r_end = r_start + meminfo.map[i].size;
printf("[%X%X, %X%X) type %d\n",
(unsigned long)(r_start >> 32),
(unsigned long)r_start,
(unsigned long)(r_end >> 32),
(unsigned long)r_end,
meminfo.map[i].type);
}
#endif
if ( ! fit ) {
DBG ( "OSLOADER got segment [%lX,%lX) "
"which does not fit in any memory region\n",
start, end );
return 0;
}
#if LOAD_DEBUG
/* Zap the whole lot. Do this so that if we're treading on
* anything, it shows up now, when the debug message is
* visible, rather than when we're partway through downloading
* the file.
*
* If you see an entire screen full of exclamation marks, then
* you've almost certainly written all over the display RAM.
* This is likely to happen if the status of the A20 line gets
* screwed up. Of course, if this happens, it's a good bet
* that you've also trashed the whole of low memory, so expect
* interesting things to happen...
*/
memset(phys_to_virt(start), '!', mid - start);
#endif
/* Zero the bss */
if (end > mid) {
memset(phys_to_virt(mid), 0, end - mid);
}
return 1;
}
memset ( phys_to_virt ( mid ), 0, end - mid );
static unsigned long find_segment(unsigned long size, unsigned long align)
{
unsigned i;
/* Verify I have a power of 2 alignment */
if (align & (align - 1)) {
return ULONG_MAX;
}
for(i = 0; i < meminfo.map_count; i++) {
unsigned long r_start, r_end;
if (meminfo.map[i].type != E820_RAM)
continue;
if ((meminfo.map[i].addr + meminfo.map[i].size) > ULONG_MAX) {
continue;
}
r_start = meminfo.map[i].addr;
r_end = r_start + meminfo.map[i].size;
/* Don't allow the segment to overlap etherboot */
if ((r_end > virt_to_phys(_text)) && (r_start < virt_to_phys(_text))) {
r_end = virt_to_phys(_text);
}
if ((r_start > virt_to_phys(_text)) && (r_start < virt_to_phys(_end))) {
r_start = virt_to_phys(_end);
}
/* Don't allow the segment to overlap the heap */
if ((r_end > heap_ptr) && (r_start < heap_ptr)) {
r_end = heap_ptr;
}
if ((r_start > heap_ptr) && (r_start < heap_bot)) {
r_start = heap_ptr;
}
r_start = (r_start + align - 1) & ~(align - 1);
if ((r_end >= r_start) && ((r_end - r_start) >= size)) {
return r_start;
}
}
/* I did not find anything :( */
return ULONG_MAX;
}
/**************************************************************************
PROBE_IMAGE - Detect image file type
**************************************************************************/
os_download_t probe_image(unsigned char *data, unsigned int len)
{
os_download_t os_download = 0;
#ifdef AOUT_IMAGE
if (!os_download) os_download = aout_probe(data, len);
#endif
#ifdef ELF_IMAGE
if (!os_download) os_download = elf32_probe(data, len);
#endif
#ifdef ELF64_IMAGE
if (!os_download) os_download = elf64_probe(data, len);
#endif
#ifdef COFF_IMAGE
if (!os_download) os_download = coff_probe(data, len);
#endif
#ifdef WINCE_IMAGE
if (!os_download) os_download = wince_probe(data, len);
#endif
#ifdef TAGGED_IMAGE
if (!os_download) os_download = tagged_probe(data, len);
#endif
/* PXE_IMAGE must always be last */
#ifdef PXE_IMAGE
if (!os_download) os_download = pxe_probe(data, len);
#endif
#ifdef RAW_IMAGE
if (!os_download) os_download = raw_probe(data, len);
#endif
return os_download;
}
/**************************************************************************
LOAD_BLOCK - Try to load file
**************************************************************************/
int load_block(unsigned char *data, unsigned int block, unsigned int len, int eof)
{
static os_download_t os_download;
static sector_t skip_sectors;
static unsigned int skip_bytes;
#ifdef SIZEINDICATOR
static int rlen = 0;
if (block == 1)
{
rlen=len;
printf("XXXX");
}
if (!(block % 4) || eof) {
int size;
size = ((block-1) * rlen + len) / 1024;
putchar('\b');
putchar('\b');
putchar('\b');
putchar('\b');
putchar('0' + (size/1000)%10);
putchar('0' + (size/100)%10);
putchar('0' + (size/10)%10);
putchar('0' + (size/1)%10);
}
#else
putchar ( '.' );
#endif
if (block == 1)
{
skip_sectors = 0;
skip_bytes = 0;
os_download = probe_image(data, len);
if (!os_download) {
printf("error: not a valid image\n");
#if 0
printf("block: %d len: %d\n", block, len);
printf("%hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx %hhx\n",
data[0], data[1], data[2], data[3],
data[4], data[5], data[6], data[7]);
#endif
return 0;
}
} /* end of block zero processing */
/* Either len is greater or the skip is greater */
if ((skip_sectors > (len >> 9)) ||
((skip_sectors == (len >> 9)) && (skip_bytes >= (len & 0x1ff)))) {
/* If I don't have enough bytes borrow them from skip_sectors */
if (skip_bytes < len) {
skip_sectors -= (len - skip_bytes + 511) >> 9;
skip_bytes += (len - skip_bytes + 511) & ~0x1ff;
}
skip_bytes -= len;
}
else {
len -= (skip_sectors << 9) + skip_bytes;
data += (skip_sectors << 9) + skip_bytes;
}
skip_sectors = os_download(data, len, eof);
skip_bytes = 0;
return 1;
}
@ -382,5 +102,3 @@ int load_block(unsigned char *data, unsigned int block, unsigned int len, int eo
* c-basic-offset: 8
* End:
*/
#endif /* KEEP_IT_REAL */