qemu/roms/openbios/arch/unix/boot.c

   1 /*
   2  *
   3  */
   4 #undef BOOTSTRAP
   5 #include "config.h"
   6 #include "libopenbios/bindings.h"
   7 #include "libopenbios/elf_load.h"
   8 #include "arch/common/nvram.h"
   9 #include "libc/diskio.h"
  10
  11 void boot(void);
  12 void *load_elf(char *spec);
  13
  14 void
  15 *load_elf(char *spec)
  16 {
  17 #if 0
  18         int fd;
  19         void *entry=NULL;
  20         int i, lszz_offs, elf_offs;
  21         char buf[128]; // , *addr;
  22         Elf_ehdr ehdr;
  23         Elf_phdr *phdr;
  24         size_t s;
  25
  26         if( (fd=open_io(spec)) == -1 )
  27                 return NULL;
  28
  29         if( (elf_offs=find_elf(fd)) < 0 ) {
  30                 printk("----> %s is not an ELF image\n", buf );
  31                 return NULL;
  32         }
  33
  34         if( !(phdr=elf_readhdrs(fd, 0, &ehdr)) ) {
  35                 printk("elf32_readhdrs failed\n");
  36                 return NULL;
  37         }
  38
  39         (unsigned long long *)entry = ehdr.e_entry;
  40
  41         lszz_offs = elf_offs;
  42         for( i=0; i<ehdr.e_phnum; i++ ) {
  43                 s = MIN( phdr[i].p_filesz, phdr[i].p_memsz );
  44                 seek_io( fd, elf_offs + phdr[i].p_offset );
  45                 /* printk("filesz: %08lX memsz: %08lX p_offset: %08lX p_vaddr %08lX\n",
  46                    phdr[i].p_filesz, phdr[i].p_memsz, phdr[i].p_offset,
  47                    phdr[i].p_vaddr ); */
  48                 if( phdr[i].p_vaddr != phdr[i].p_paddr )
  49                         printk("WARNING: ELF segment virtual addr != physical addr\n");
  50                 lszz_offs = MAX( lszz_offs, elf_offs + phdr[i].p_offset + phdr[i].p_filesz );
  51                 if( !s )
  52                         continue;
  53
  54                  printk("ELF ROM-section loaded at %08lX (size %08lX)\n",
  55                                  (unsigned long)phdr[i].p_vaddr, (unsigned long)phdr[i].p_memsz);
  56         }
  57         free( phdr );
  58         return entry;
  59 #else
  60         return NULL;
  61 #endif
  62 }
  63
  64 void
  65 boot( void )
  66 {
  67         char *path;
  68         void *entry;
  69
  70         /* Copy the incoming path */
  71         fword("2dup");
  72         path = pop_fstr_copy();
  73
  74         if(!path) {
  75                 printk("[unix] Booting default not supported.\n");
  76                 return;
  77         }
  78         printk("[unix] Booting '%s'\n",path);
  79         entry=load_elf(path);
  80         if(entry)
  81                 printk("successfully loaded client at %llx.\n", (unsigned long long)(ucell)entry);
  82         else
  83                 printk("failed.\n");
  84 }