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;
}
}
/*===========================================================================*
* do_exec *
*===========================================================================*/
int do_exec(struct proc * caller, message * m_ptr)
{
/* Handle sys_exec(). A process has done a successful EXEC. Patch it up. */
register struct proc *rp;
int proc_nr;
char name[PROC_NAME_LEN];
if(!isokendpt(m_ptr->PR_ENDPT, &proc_nr))
return EINVAL;
rp = proc_addr(proc_nr);
if(rp->p_misc_flags & MF_DELIVERMSG) {
rp->p_misc_flags &= ~MF_DELIVERMSG;
}
/* Save command name for debugging, ps(1) output, etc. */
if(data_copy(caller->p_endpoint, (vir_bytes) m_ptr->PR_NAME_PTR,
KERNEL, (vir_bytes) name,
(phys_bytes) sizeof(name) - 1) != OK)
strncpy(name, "<unset>", PROC_NAME_LEN);
name[sizeof(name)-1] = '\0';
/* Set process state. */
arch_proc_init(rp, (u32_t) m_ptr->PR_IP_PTR, (u32_t) m_ptr->PR_STACK_PTR, name);
/* No reply to EXEC call */
RTS_UNSET(rp, RTS_RECEIVING);
/* Mark fpu_regs contents as not significant, so fpu
* will be initialized, when it's used next time. */
rp->p_misc_flags &= ~MF_FPU_INITIALIZED;
/* force reloading FPU if the current process is the owner */
release_fpu(rp);
return(OK);
}
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;
}
}
