#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)kvm_proc.c 8.4 (Berkeley) 8/20/94";
#endif
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#if defined(__APPLE__)
#include <sys/vm.h>
#include <mach/machine/vm_param.h>
#include <mach/mach_types.h>
#include <machine/vmparam.h>
#warning Using VM_MAX_USER_ADDRESS = VM_MAX_ADDRESS
#define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS
#else
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/swap_pager.h>
#endif
#include <sys/sysctl.h>
#include <limits.h>
#include <db.h>
#include <paths.h>
#include "kvm_private.h"
#if defined(__APPLE__)
#include <stdio.h>
static char *
kvm_readswap(kd, p, va, cnt)
kvm_t *kd;
const struct proc *p;
u_long va;
u_long *cnt;
{
#warning kvm_readswap: not yet implemented
return NULL;
}
#else
static char *
kvm_readswap(kd, p, va, cnt)
kvm_t *kd;
const struct proc *p;
u_long va;
u_long *cnt;
{
register int ix;
register u_long addr, head;
register u_long offset, pagestart, sbstart, pgoff;
register off_t seekpoint;
struct vm_map_entry vme;
struct vm_object vmo;
struct pager_struct pager;
struct swpager swap;
struct swblock swb;
static char page[NBPG];
head = (u_long)&p->p_vmspace->vm_map.header;
addr = head;
while (1) {
if (kvm_read(kd, addr, (char *)&vme, sizeof(vme)) !=
sizeof(vme))
return (0);
if (va >= vme.start && va <= vme.end &&
vme.object.vm_object != 0)
break;
addr = (u_long)vme.next;
if (addr == 0 || addr == head)
return (0);
}
offset = va - vme.start + vme.offset;
addr = (u_long)vme.object.vm_object;
while (1) {
if (kvm_read(kd, addr, (char *)&vmo, sizeof(vmo)) !=
sizeof(vmo))
return (0);
addr = (u_long)vmo.shadow;
if (addr == 0)
break;
offset += vmo.shadow_offset;
}
if (vmo.pager == 0)
return (0);
offset += vmo.paging_offset;
addr = (u_long)vmo.pager;
if (kvm_read(kd, addr, (char *)&pager, sizeof(pager)) != sizeof(pager)
|| pager.pg_type != PG_SWAP)
return (0);
addr = (u_long)pager.pg_data;
if (kvm_read(kd, addr, (char *)&swap, sizeof(swap)) != sizeof(swap))
return (0);
ix = offset / dbtob(swap.sw_bsize);
if (swap.sw_blocks == 0 || ix >= swap.sw_nblocks)
return (0);
addr = (u_long)&swap.sw_blocks[ix];
if (kvm_read(kd, addr, (char *)&swb, sizeof(swb)) != sizeof(swb))
return (0);
sbstart = (offset / dbtob(swap.sw_bsize)) * dbtob(swap.sw_bsize);
sbstart /= NBPG;
pagestart = offset / NBPG;
pgoff = pagestart - sbstart;
if (swb.swb_block == 0 || (swb.swb_mask & (1 << pgoff)) == 0)
return (0);
seekpoint = dbtob(swb.swb_block) + ctob(pgoff);
errno = 0;
if (lseek(kd->swfd, seekpoint, 0) == -1 && errno != 0)
return (0);
if (read(kd->swfd, page, sizeof(page)) != sizeof(page))
return (0);
offset %= NBPG;
*cnt = NBPG - offset;
return (&page[offset]);
}
#endif
#define KREAD(kd, addr, obj) \
(kvm_read(kd, addr, (char *)(obj), sizeof(*obj)) != sizeof(*obj))
static int
kvm_proclist(kd, what, arg, p, bp, maxcnt)
kvm_t *kd;
int what, arg;
struct proc *p;
struct kinfo_proc *bp;
int maxcnt;
{
return (-1);
}
static int
kvm_deadprocs(kd, what, arg, a_allproc, a_zombproc, maxcnt)
kvm_t *kd;
int what, arg;
u_long a_allproc;
u_long a_zombproc;
int maxcnt;
{
return (-1);
}
struct kinfo_proc *
kvm_getprocs(kd, op, arg, cnt)
kvm_t *kd;
int op, arg;
int *cnt;
{
int mib[4], size, st, nprocs;
if (kd->procbase != 0) {
free((void *)kd->procbase);
kd->procbase = 0;
}
if (ISALIVE(kd)) {
size = 0;
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = op;
mib[3] = arg;
st = sysctl(mib, 4, NULL, &size, NULL, 0);
if (st == -1) {
_kvm_syserr(kd, kd->program, "kvm_getprocs");
return (0);
}
kd->procbase = (struct kinfo_proc *)_kvm_malloc(kd, size);
if (kd->procbase == 0)
return (0);
st = sysctl(mib, 4, kd->procbase, &size, NULL, 0);
if (st == -1) {
_kvm_syserr(kd, kd->program, "kvm_getprocs");
return (0);
}
if (size % sizeof(struct kinfo_proc) != 0) {
_kvm_err(kd, kd->program,
"proc size mismatch (%d total, %d chunks)",
size, sizeof(struct kinfo_proc));
return (0);
}
nprocs = size / sizeof(struct kinfo_proc);
} else {
struct nlist nl[4], *p;
nl[0].n_name = "_nprocs";
nl[1].n_name = "_allproc";
nl[2].n_name = "_zombproc";
nl[3].n_name = 0;
if (kvm_nlist(kd, nl) != 0) {
for (p = nl; p->n_type != 0; ++p)
;
_kvm_err(kd, kd->program,
"%s: no such symbol", p->n_name);
return (0);
}
if (KREAD(kd, nl[0].n_value, &nprocs)) {
_kvm_err(kd, kd->program, "can't read nprocs");
return (0);
}
size = nprocs * sizeof(struct kinfo_proc);
kd->procbase = (struct kinfo_proc *)_kvm_malloc(kd, size);
if (kd->procbase == 0)
return (0);
nprocs = kvm_deadprocs(kd, op, arg, nl[1].n_value,
nl[2].n_value, nprocs);
#ifdef notdef
size = nprocs * sizeof(struct kinfo_proc);
(void)realloc(kd->procbase, size);
#endif
}
*cnt = nprocs;
return (kd->procbase);
}
void
_kvm_freeprocs(kd)
kvm_t *kd;
{
if (kd->procbase) {
free(kd->procbase);
kd->procbase = 0;
}
}
void *
_kvm_realloc(kd, p, n)
kvm_t *kd;
void *p;
size_t n;
{
void *np = (void *)realloc(p, n);
if (np == 0)
_kvm_err(kd, kd->program, "out of memory");
return (np);
}
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
static char **
kvm_argv(kd, p, addr, narg, maxcnt)
kvm_t *kd;
struct proc *p;
register u_long addr;
register int narg;
register int maxcnt;
{
register char *cp;
register int len, cc;
register char **argv;
if (narg > 512 || addr < VM_MIN_ADDRESS || addr >= VM_MAXUSER_ADDRESS)
return (0);
if (kd->argv == 0) {
kd->argc = MAX(narg + 1, 32);
kd->argv = (char **)_kvm_malloc(kd, kd->argc *
sizeof(*kd->argv));
if (kd->argv == 0)
return (0);
} else if (narg + 1 > kd->argc) {
kd->argc = MAX(2 * kd->argc, narg + 1);
kd->argv = (char **)_kvm_realloc(kd, kd->argv, kd->argc *
sizeof(*kd->argv));
if (kd->argv == 0)
return (0);
}
if (kd->argspc == 0) {
kd->argspc = (char *)_kvm_malloc(kd, NBPG);
if (kd->argspc == 0)
return (0);
kd->arglen = NBPG;
}
cp = kd->argspc;
argv = kd->argv;
*argv = cp;
len = 0;
while (addr < VM_MAXUSER_ADDRESS) {
cc = NBPG - (addr & PGOFSET);
if (maxcnt > 0 && cc > maxcnt - len)
cc = maxcnt - len;;
if (len + cc > kd->arglen) {
register int off;
register char **pp;
register char *op = kd->argspc;
kd->arglen *= 2;
kd->argspc = (char *)_kvm_realloc(kd, kd->argspc,
kd->arglen);
if (kd->argspc == 0)
return (0);
cp = &kd->argspc[len];
off = kd->argspc - op;
for (pp = kd->argv; pp < argv; ++pp)
*pp += off;
}
if (kvm_uread(kd, p, addr, cp, cc) != cc)
return (0);
len += cc;
addr += cc;
if (maxcnt == 0 && len > 16 * NBPG)
return (0);
while (--cc >= 0) {
if (*cp++ == 0) {
if (--narg <= 0) {
*++argv = 0;
return (kd->argv);
} else
*++argv = cp;
}
}
if (maxcnt > 0 && len >= maxcnt) {
*++argv = 0;
*cp = 0;
return (kd->argv);
}
}
}
static void
ps_str_a(p, addr, n)
struct ps_strings *p;
u_long *addr;
int *n;
{
*addr = (u_long)p->ps_argvstr;
*n = p->ps_nargvstr;
}
static void
ps_str_e(p, addr, n)
struct ps_strings *p;
u_long *addr;
int *n;
{
*addr = (u_long)p->ps_envstr;
*n = p->ps_nenvstr;
}
#if !defined(USRSTACK)
#warning USRSTACK not defined! using VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS
#define USRSTACK (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS)
#endif
static char **
kvm_doargv(kd, kp, nchr, info)
kvm_t *kd;
const struct kinfo_proc *kp;
int nchr;
int (*info)(struct ps_strings*, u_long *, int *);
{
return (0);
}
char **
kvm_getargv(kd, kp, nchr)
kvm_t *kd;
const struct kinfo_proc *kp;
int nchr;
{
return (kvm_doargv(kd, kp, nchr, ps_str_a));
}
char **
kvm_getenvv(kd, kp, nchr)
kvm_t *kd;
const struct kinfo_proc *kp;
int nchr;
{
return (kvm_doargv(kd, kp, nchr, ps_str_e));
}
int
kvm_uread(kd, p, uva, buf, len)
kvm_t *kd;
register struct proc *p;
register u_long uva;
register char *buf;
register size_t len;
{
register char *cp;
cp = buf;
while (len > 0) {
u_long pa;
register int cc;
cc = _kvm_uvatop(kd, p, uva, &pa);
if (cc > 0) {
if (cc > len)
cc = len;
errno = 0;
if (lseek(kd->pmfd, (off_t)pa, 0) == -1 && errno != 0) {
_kvm_err(kd, 0, "invalid address (%x)", uva);
break;
}
cc = read(kd->pmfd, cp, cc);
if (cc < 0) {
_kvm_syserr(kd, 0, _PATH_MEM);
break;
} else if (cc < len) {
_kvm_err(kd, kd->program, "short read");
break;
}
} else if (ISALIVE(kd)) {
register char *dp;
int cnt;
dp = kvm_readswap(kd, p, uva, &cnt);
if (dp == 0) {
_kvm_err(kd, 0, "invalid address (%x)", uva);
return (0);
}
cc = MIN(cnt, len);
bcopy(dp, cp, cc);
} else
break;
cp += cc;
uva += cc;
len -= cc;
}
return (int)(cp - buf);
}
#if 0
void
fill_externproc(p, exp)
register struct proc *p;
register struct extern_proc *exp;
{
exp->p_ru = p->p_ru ;
}
#endif