EMILE/second/load.c
2007-08-18 13:34:17 +00:00

212 lines
4.9 KiB
C

/*
*
* (c) 2004,2005 Laurent Vivier <Laurent@lvivier.info>
*
*/
#define __NO_INLINE__
#include <stdio.h>
#include <malloc.h>
#include <elf.h>
#include <string.h>
#include <macos/types.h>
#include <macos/devices.h>
#include <libui.h>
#include <libstream.h>
#include "console.h"
#include "bank.h"
#include "misc.h"
#include "load.h"
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define BAR_STEP 40
static int bar_read(stream_t *stream, emile_progressbar_t *pg,
char*buffer, int size,
int current, int total_size)
{
int read = 0;
int blksize = (total_size + BAR_STEP - 1) / BAR_STEP;
int ret;
while (size)
{
if (blksize > size)
blksize = size;
ret = stream_read(stream, buffer, blksize);
read += ret;
if (ret != blksize)
break;
emile_progressbar_value(pg, current + read);
buffer += ret;
size -= ret;
}
return read;
}
char* load_kernel(char* path, int bootstrap_size,
unsigned long *base, unsigned long *entry, unsigned long *size)
{
Elf32_Ehdr elf_header;
Elf32_Phdr *program_header;
int ret;
unsigned long min_addr, max_addr, kernel_size;
int i;
char *kernel;
stream_t *stream;
int read;
int to_read;
emile_window_t win = { 18, 10, 1, 60 };
emile_progressbar_t *pg;
console_set_cursor_position(win.l - 2, win.c + (win.w - strlen("Loading kernel")) / 2);
printf("Loading kernel");
stream = stream_open(path);
if (stream == NULL)
return NULL;
stream_uncompress(stream);
ret = stream_read(stream, &elf_header, sizeof(Elf32_Ehdr));
if (ret != sizeof(Elf32_Ehdr))
error("Cannot read\n");
#ifdef ARCH_M68K
if (elf_header.e_machine != EM_68K)
{
printf( "Not MC680x0 architecture\n");
return NULL;
}
#endif /* ARCH_M68K */
#ifdef ARCH_PPC
if (elf_header.e_machine != EM_PPC)
{
printf( "Not PowerPC architecture\n");
return NULL;
}
#endif /* ARCH_PPC */
if (elf_header.e_type != ET_EXEC)
{
printf( "Not an executable file\n");
return NULL;
}
program_header = (Elf32_Phdr *)malloc(elf_header.e_phnum *
sizeof (Elf32_Phdr));
if (program_header == NULL)
{
printf( "Cannot allocate memory\n");
return NULL;
}
ret = stream_lseek(stream, elf_header.e_phoff, SEEK_SET);
ret = stream_read(stream, program_header, elf_header.e_phnum * sizeof(Elf32_Phdr));
min_addr = 0xffffffff;
max_addr = 0;
to_read = 0;
for (i = 0; i < elf_header.e_phnum; i++)
{
if (program_header[i].p_memsz == 0)
continue;
min_addr = (min_addr > program_header[i].p_vaddr) ?
program_header[i].p_vaddr : min_addr;
max_addr = (max_addr < program_header[i].p_vaddr + program_header[i].p_memsz) ?
program_header[i].p_vaddr + program_header[i].p_memsz: max_addr;
to_read += program_header[i].p_filesz;
}
if (min_addr == 0)
{
min_addr = PAGE_SIZE;
program_header[0].p_vaddr += PAGE_SIZE;
program_header[0].p_offset += PAGE_SIZE;
program_header[0].p_filesz -= PAGE_SIZE;
program_header[0].p_memsz -= PAGE_SIZE;
}
kernel_size = max_addr - min_addr;
*base = min_addr;
*entry = elf_header.e_entry;
*size = kernel_size;
kernel = (char*)malloc_contiguous(kernel_size + PAGE_SIZE + bootstrap_size);
kernel = (char*)(((unsigned long)kernel + PAGE_SIZE) & ~(PAGE_SIZE - 1));
if (!check_full_in_bank((unsigned long)kernel, kernel_size))
error("Kernel between two banks, contact maintainer\n");
memset(kernel, 0, kernel_size);
read = 0;
pg = emile_progressbar_create(&win, to_read);
for (i = 0; i < elf_header.e_phnum; i++)
{
ret = stream_lseek(stream, program_header[i].p_offset, SEEK_SET);
if (ret != program_header[i].p_offset)
{
error("Cannot seek");
}
ret = bar_read( stream, pg,
kernel + program_header[i].p_vaddr - min_addr,
program_header[i].p_filesz,
read, to_read);
if (ret != program_header[i].p_filesz)
{
printf("Read %d instead of %d\n",
ret, program_header[i].p_filesz);
error("Cannot load");
}
read += ret;
}
emile_progressbar_value(pg, to_read);
emile_progressbar_delete(pg);
ret = stream_close(stream);
return kernel;
}
char *load_ramdisk(char* path, unsigned long *ramdisk_size)
{
stream_t *stream;
char *ramdisk_start;
struct stream_stat stat;
int ret;
emile_window_t win = { 22, 10, 1, 60 };
emile_progressbar_t *pg;
stream = stream_open(path);
if (stream == NULL)
return NULL;
stream_fstat(stream, &stat);
ramdisk_start = (char*)malloc_top(stat.st_size + 4);
ramdisk_start = (char*)(((unsigned long)ramdisk_start + 3) & 0xFFFFFFFC);
if (!check_full_in_bank((unsigned long)ramdisk_start, stat.st_size))
error("ramdisk between two banks, contact maintainer\n");
console_set_cursor_position(win.l - 2, win.c + (win.w - strlen("Loading RAMDISK")) / 2);
printf("Loading RAMDISK");
pg = emile_progressbar_create(&win, stat.st_size);
ret = bar_read(stream, pg, ramdisk_start, stat.st_size, 0, stat.st_size);
emile_progressbar_delete(pg);
putchar('\n');
if (ret != stat.st_size)
error("Cannot load");
stream_close(stream);
*ramdisk_size = stat.st_size;
return ramdisk_start;
}