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");
}
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;
}
}