int monte_load_linux_initrd(struct monte_boot_t *boot,
const void *buffer, long size) {
long initrd_addr;
void *ramdisk_data;
struct monte_region_t *region;
/*--- XXX Disgusting hack ---------------------------------------------
* We can't tell how big memory is very easily from user space.
* /proc/meminfo is close but a pain to read. In stead we just
* stat /proc/kcore. This seems easiest and comes closest to the
* correct answer. What a mess.
*-------------------------------------------------------------------*/
struct stat buf;
if (stat("/proc/kcore", &buf) == -1) {
buf.st_size = 32*1024*1024; /* a random guess if /proc isn't mounted.*/
}
initrd_addr = ((buf.st_size/4)*3) & PAGE_MASK;
/* Next problem: We don't know how big this ram disk image is a
* head of time so just start loading a page at a time :P */
region = region_new(boot, (void *) initrd_addr);
ramdisk_data = region_size(region, size);
memcpy(ramdisk_data, buffer, size);
printf("monte: initial ramdisk: %8ld bytes at %p\n",
size, (void *)initrd_addr);
/* Put the right bits in RAM so the kernel will find the initrd */
#if defined(__i386__)
boot->setup->ramdisk = initrd_addr;
boot->setup->ramdisk_size = size;
#elif defined(__alpha__)
region = region_new(boot, (void *) __pa(boot->param.entrypoint - 0x6000));
ramdisk_data = region_size(region, PAGE_SIZE);
ramdisk_data += 0x100;
((long*)ramdisk_data)[0] = __va(initrd_addr);
((long*)ramdisk_data)[1] = size;
#else
#error No initrd argument placement code for this architecture.
#endif
return 0;
}
int monte_load_linux_command_line(struct monte_boot_t *boot, char *cmdline) {
struct monte_region_t *region;
char *cmd_line;
/* Setup the kernel command line */
region = region_new(boot, (void *) MONTE_CMDLINE_BEGIN);
cmd_line = region_size(region, PAGE_SIZE);
boot->setup->cmd_line_ptr = MONTE_CMDLINE_BEGIN;
boot->setup->cmd_magic = CMDLINE_MAGIC;
boot->setup->cmd_offset = MONTE_CMDLINE_BEGIN - MONTE_SETUP_BEGIN;
strcpy(cmd_line, cmdline);
printf("monte: command line : \"%s\"\n", cmdline);
return 0;
}
int monte_load_linux_command_line(struct monte_boot_t *boot, char *cmdline) {
struct monte_region_t *region;
char *cmd_line;
/* Setup the kernel command line */
/* On alpha, the command line sits in the zero page at address
* ?0a000 which is in the region before the kernel entry
* point... Also, one page should be enough for it.*/
region = region_new(boot, (void *) __pa(boot->param.entrypoint - 0x6000));
cmd_line = region_size(region, PAGE_SIZE);
strcpy(cmd_line, cmdline);
printf("monte: command line : \"%s\"\n", cmdline);
return 0;
}
static
int load_elf_image(struct monte_boot_t *boot, const void *buffer, long size) {
int i;
Elf64_Ehdr *ehdr;
Elf64_Phdr *phdr;
struct monte_region_t *region;
void *kernimage;
/* Super simple ELF loader that makes gobs of assumptions that
* won't be valid anywhere except Linux ELF kernel images */
ehdr = (Elf64_Ehdr *) buffer;
if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG) != 0) {
fprintf(stderr, "not an ELF file.\n");
return -1;
}
if (ehdr->e_ident[EI_CLASS] != ELFCLASS64) {
fprintf(stderr, "ELF object is not an ELF64 object.\n");
return -1;
}
phdr = (Elf64_Phdr *)(buffer + ehdr->e_phoff);
for (i=0; i < ehdr->e_phnum; i++) {
/* Load a program section */
/* Setup a region for this thing */
region = region_new(boot, (void*)__pa(phdr[i].p_vaddr));
kernimage = region_size(region, phdr[i].p_memsz+(1024*PAGE_SIZE));
/* Load data and zero the rest (BSS) */
printf("monte: kernel code : %8ld bytes at %p\n",
phdr[i].p_filesz, (void*) __pa(phdr[i].p_vaddr));
memcpy(kernimage, buffer + phdr[i].p_offset, phdr[i].p_filesz);
memset(kernimage + phdr[i].p_filesz, 0,
phdr[i].p_memsz - phdr[i].p_filesz);
}
boot->param.entrypoint = ehdr->e_entry;
printf("monte: entry point : %p\n", (void*)boot->param.entrypoint);
return 0;
}
inline HeapWord*
ParMarkBitMap::region_end() const
{
return region_start() + region_size();
}
int monte_load_linux_kernel(struct monte_boot_t *boot,
const void *buffer, long size){
void *setup_data, *kernel_data;
struct monte_region_t *region;
struct kernel_setup_t *stmp;
stmp = (struct kernel_setup_t *)buffer;
/* Sanity check */
/* Check for the kernel setup signature */
if (stmp->boot_flag != BS_SIG_VAL) {
fprintf(stderr, "monte: Boot signature not found.\n");
return -1;
}
/* Sanity check number of sectors */
if (stmp->setup_sects > MAX_SETUP_SECTS) {
fprintf(stderr, "monte: number of setup sectors too large: %d"
" (max %d)\n",(int) stmp->setup_sects, MAX_SETUP_SECTS);
return -1;
}
/* Check for that setup signature. */
if (strncmp(stmp->signature, SETUP_SIG_VAL,
strlen(SETUP_SIG_VAL)) != 0) {
fprintf(stderr, "monte: Kernel image setup signature not found.\n");
return -1;
}
/* Setup the region for the setup code */
region = region_new(boot, (void *)MONTE_SETUP_BEGIN);
setup_data = region_size(region, (stmp->setup_sects+1)*512);
boot->setup = setup_data;
memcpy(setup_data, buffer, (stmp->setup_sects+1)*512);
printf("monte: kernel setup : %8d bytes at %p\n",
((int) stmp->setup_sects)*512, (void*)MONTE_SETUP_BEGIN);
buffer += (stmp->setup_sects+1)*512; /* update buffer pointers */
size -= (stmp->setup_sects+1)*512;
/* The number of kernel "paragraphs" is getting overflowed by
* todays kernels. Ignore it and just load the rest of the data
* we have. */
region = region_new(boot, (void*)boot->setup->start);
kernel_data = region_size(region, size);
memcpy(kernel_data, buffer, size);
printf("monte: kernel code : %8d bytes at %p\n",
(int) size, (void *) boot->setup->start);
if (boot->param.flags & MONTE_PROTECTED) {
if (save_old_setup(boot)) return -1;
boot->param.entrypoint = boot->setup->start;
} else
boot->param.entrypoint = 0x90200000; /* Real mode 9020:0000 */
/* XXXXX FIX ME XXXXXX THIS IS A HACK!!! XXXXXX */
if (boot->param.entrypoint == 0) {
printf("monte: Forcing entry point to 0x100000\n");
boot->param.entrypoint = 0x100000;
}
/* XXXXX FIX ME XXXXXX THIS IS A HACK!!! XXXXXX */
boot->setup->loader = 0x50; /* Set the loader type. */
boot->setup->ramdisk = 0;
boot->setup->ramdisk_size = 0;
boot->setup->cmd_magic = 0;
boot->setup->cmd_offset = 0;
return 0;
}