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Annotation of sys/arch/jornada/stand/boot/exec.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: exec.c,v 1.3 2006/07/30 21:38:12 drahn Exp $  */
                      2:
                      3: /*
                      4:  * Copyright (c) 2006 Mark Kettenis
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18:
                     19: #include <sys/param.h>
                     20:
                     21: #include <lib/libsa/loadfile.h>
                     22:
                     23: #ifdef BOOT_ELF
                     24: #include <sys/exec_elf.h>
                     25: #endif
                     26:
                     27: #include <sys/reboot.h>
                     28: #include <stand/boot/cmd.h>
                     29: #include <machine/bootconfig.h>
                     30:
                     31: typedef void (*startfuncp)(void) __attribute__ ((noreturn));
                     32:
                     33: void
                     34: run_loadfile(u_long *marks, int howto)
                     35: {
                     36: #ifdef BOOT_ELF
                     37:        Elf_Ehdr *elf = (Elf_Ehdr *)marks[MARK_SYM];
                     38:        Elf_Shdr *shp = (Elf_Shdr *)(marks[MARK_SYM] + elf->e_shoff);
                     39:        u_long esym = marks[MARK_END];
                     40:        char *cp;
                     41:        int i;
                     42:
                     43:        /*
                     44:         * Tell locore.S where the symbol table ends by setting
                     45:         * 'esym', which should be the first word in the .data
                     46:         * section.
                     47:         */
                     48:        for (i = 0; i < elf->e_shnum; i++) {
                     49:                /* XXX Assume .data is the first writable segment. */
                     50:                if (shp[i].sh_flags & SHF_WRITE) {
                     51:                        /* XXX We have to store the virtual address. */
                     52:                        esym |= shp[i].sh_addr & 0xff000000;
                     53:                        *(u_long *)(shp[i].sh_addr & 0x00ffffff) = esym;
                     54:                        break;
                     55:                }
                     56:        }
                     57: #endif
                     58:        cp = (char *)0x00200000 - MAX_BOOT_STRING - 1;
                     59:
                     60: #define      BOOT_STRING_MAGIC 0x4f425344
                     61:
                     62:        *(int *)cp = BOOT_STRING_MAGIC;
                     63:
                     64:        cp += sizeof(int);
                     65:        snprintf(cp, MAX_BOOT_STRING, "%s:%s -", cmd.bootdev, cmd.image);
                     66:
                     67:        while (*cp != '\0')
                     68:                cp++;
                     69:        if (howto & RB_ASKNAME)
                     70:                *cp++ = 'a';
                     71:        if (howto & RB_CONFIG)
                     72:                *cp++ = 'c';
                     73:        if (howto & RB_KDB)
                     74:                *cp++ = 'd';
                     75:        if (howto & RB_SINGLE)
                     76:                *cp++ = 's';
                     77:
                     78:        *cp = '\0';
                     79:
                     80:        (*(startfuncp)(marks[MARK_ENTRY]))();
                     81:
                     82:        /* NOTREACHED */
                     83: }