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Annotation of qemu/roms/openbios/arch/unix/boot.c, revision 1.1

1.1     ! root        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: }

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