Return to exec.c CVS log

Up to [local] / sys / arch / armish / stand / boot

Annotation of sys/arch/armish/stand/boot/exec.c, Revision 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: }