Ejemplo n.º 1
0
void exec_bootproc(struct vmproc *vmp, struct boot_image *ip)
{
	struct vm_exec_info vmexeci;
	struct exec_info *execi = &vmexeci.execi;
	char hdr[VM_PAGE_SIZE];

	memset(&vmexeci, 0, sizeof(vmexeci));

	if(pt_new(&vmp->vm_pt) != OK)
		panic("VM: no new pagetable");

	if(pt_bind(&vmp->vm_pt, vmp) != OK)
		panic("VM: pt_bind failed");

	if(sys_physcopy(NONE, ip->start_addr, SELF,
		(vir_bytes) hdr, sizeof(hdr)) != OK)
		panic("can't look at boot proc header");

        execi->stack_high = kernel_boot_info.user_sp;
        execi->stack_size = DEFAULT_STACK_LIMIT;
        execi->proc_e = vmp->vm_endpoint;
        execi->hdr = hdr;
        execi->hdr_len = sizeof(hdr);
        strlcpy(execi->progname, ip->proc_name, sizeof(execi->progname));
        execi->frame_len = 0;
	execi->opaque = &vmexeci;
	execi->filesize = ip->len;

	vmexeci.ip = ip;
	vmexeci.vmp = vmp;

        /* callback functions and data */
        execi->copymem = libexec_copy_physcopy;
        execi->clearproc = NULL;
        execi->clearmem = libexec_clear_sys_memset;
	execi->allocmem_prealloc_junk = libexec_alloc_vm_prealloc;
	execi->allocmem_prealloc_cleared = libexec_alloc_vm_prealloc;
        execi->allocmem_ondemand = libexec_alloc_vm_ondemand;

	if(libexec_load_elf(execi) != OK)
		panic("vm: boot process load of process %s (ep=%d) failed\n", 
			execi->progname,vmp->vm_endpoint);

        if(sys_exec(vmp->vm_endpoint, (char *) execi->stack_high - 12,
		(char *) ip->proc_name, execi->pc) != OK)
		panic("vm: boot process exec of process %s (ep=%d) failed\n", 
			execi->progname,vmp->vm_endpoint);

	/* make it runnable */
	if(sys_vmctl(vmp->vm_endpoint, VMCTL_BOOTINHIBIT_CLEAR, 0) != OK)
		panic("VMCTL_BOOTINHIBIT_CLEAR failed");
}
Ejemplo n.º 2
0
void arch_boot_proc(struct boot_image *ip, struct proc *rp)
{
    multiboot_module_t *mod;

    if(rp->p_nr < 0) return;

    mod = bootmod(rp->p_nr);

    /* Important special case: we put VM in the bootstrap pagetable
     * so it can run.
     */

    if(rp->p_nr == VM_PROC_NR) {
        struct exec_info execi;

        memset(&execi, 0, sizeof(execi));

        /* exec parameters */
        execi.stack_high = kinfo.user_sp;
        execi.stack_size = 64 * 1024;	/* not too crazy as it must be preallocated */
        execi.proc_e = ip->endpoint;
        execi.hdr = (char *) mod->mod_start; /* phys mem direct */
        execi.filesize = execi.hdr_len = mod->mod_end - mod->mod_start;
        strcpy(execi.progname, ip->proc_name);
        execi.frame_len = 0;

        /* callbacks for use in the kernel */
        execi.copymem = libexec_copy_memcpy;
        execi.clearmem = libexec_clear_memset;
        execi.allocmem_prealloc_cleared = libexec_pg_alloc;
        execi.allocmem_prealloc_junk = libexec_pg_alloc;
        execi.allocmem_ondemand = libexec_pg_alloc;
        execi.clearproc = NULL;

        /* parse VM ELF binary and alloc/map it into bootstrap pagetable */
        libexec_load_elf(&execi);

        /* Initialize the server stack pointer. Take it down three words
        * to give startup code something to use as "argc", "argv" and "envp".
         */
        arch_proc_init(rp, execi.pc, kinfo.user_sp - 3*4, ip->proc_name);

        /* Free VM blob that was just copied into existence. */
        add_memmap(&kinfo, mod->mod_start, mod->mod_end-mod->mod_start);
        mod->mod_end = mod->mod_start = 0;

        /* Remember them */
        kinfo.vm_allocated_bytes = alloc_for_vm;
    }
}
void arch_boot_proc(struct boot_image *ip, struct proc *rp)
{
	multiboot_module_t *mod;
	struct ps_strings *psp;
	char *sp;

	if(rp->p_nr < 0) return;

	mod = bootmod(rp->p_nr);

	/* Important special case: we put VM in the bootstrap pagetable
	 * so it can run.
	 */

	if(rp->p_nr == VM_PROC_NR) {
		struct exec_info execi;

		memset(&execi, 0, sizeof(execi));

		/* exec parameters */
		execi.stack_high = kinfo.user_sp;
		execi.stack_size = 64 * 1024;	/* not too crazy as it must be preallocated */
		execi.proc_e = ip->endpoint;
		execi.hdr = (char *) mod->mod_start; /* phys mem direct */
		execi.filesize = execi.hdr_len = mod->mod_end - mod->mod_start;
		strlcpy(execi.progname, ip->proc_name, sizeof(execi.progname));
		execi.frame_len = 0;

		/* callbacks for use in the kernel */
		execi.copymem = libexec_copy_memcpy;
		execi.clearmem = libexec_clear_memset;
		execi.allocmem_prealloc_junk = libexec_pg_alloc;
		execi.allocmem_prealloc_cleared = libexec_pg_alloc;
		execi.allocmem_ondemand = libexec_pg_alloc;
		execi.clearproc = NULL;

		/* parse VM ELF binary and alloc/map it into bootstrap pagetable */
		if(libexec_load_elf(&execi) != OK)
			panic("VM loading failed");

		/* Setup a ps_strings struct on the stack, pointing to the
		 * following argv, envp. */
		sp = (char *)execi.stack_high;
		sp -= sizeof(struct ps_strings);
		psp = (struct ps_strings *) sp;

		/* Take the stack pointer down three words to give startup code
		 * something to use as "argc", "argv" and "envp".
		 */
		sp -= (sizeof(void *) + sizeof(void *) + sizeof(int));

		// linear address space, so it is available.
		psp->ps_argvstr = (char **)(sp + sizeof(int));
		psp->ps_nargvstr = 0;
		psp->ps_envstr = psp->ps_argvstr + sizeof(void *);
		psp->ps_nenvstr = 0;

		arch_proc_init(rp, execi.pc, (vir_bytes)sp,
			execi.stack_high - sizeof(struct ps_strings),
			ip->proc_name);

		/* Free VM blob that was just copied into existence. */
		add_memmap(&kinfo, mod->mod_start, mod->mod_end-mod->mod_start);
		mod->mod_end = mod->mod_start = 0;

		/* Remember them */
		kinfo.vm_allocated_bytes = alloc_for_vm;
	}
}