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[unix-history] / usr / src / sys / kern / kern_exec.c
diff --git a/usr/src/sys/kern/kern_exec.c b/usr/src/sys/kern/kern_exec.c
index 4d5a2e0..4d27e87 100644 (file)
--- a/usr/src/sys/kern/kern_exec.c
+++ b/usr/src/sys/kern/kern_exec.c
@@ -1,67 +1,55 @@
-/*
- * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
+/*-
+ * Copyright (c) 1982, 1986, 1991 The Regents of the University of California.
  * All rights reserved.
  *
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * %sccs.include.proprietary.c%
  *
  *
- *     @(#)kern_exec.c 7.26 (Berkeley) %G%
+ *     @(#)kern_exec.c 7.55 (Berkeley) %G%
  */
 
 #include "param.h"
 #include "systm.h"
  */
 
 #include "param.h"
 #include "systm.h"
-#include "map.h"
-#include "syscontext.h"
+#include "filedesc.h"
 #include "kernel.h"
 #include "proc.h"
 #include "mount.h"
 #include "kernel.h"
 #include "proc.h"
 #include "mount.h"
-#include "ucred.h"
 #include "malloc.h"
 #include "malloc.h"
-#include "buf.h"
+#include "namei.h"
 #include "vnode.h"
 #include "vnode.h"
-#include "seg.h"
-#include "vm.h"
-#include "text.h"
 #include "file.h"
 #include "file.h"
-#include "uio.h"
 #include "acct.h"
 #include "exec.h"
 #include "acct.h"
 #include "exec.h"
+#include "ktrace.h"
+#include "resourcevar.h"
 
 
+#include "machine/cpu.h"
 #include "machine/reg.h"
 #include "machine/reg.h"
-#include "machine/pte.h"
-#include "machine/psl.h"
-#include "machine/mtpr.h"
+
+#include "mman.h"
+#include "vm/vm.h"
+#include "vm/vm_param.h"
+#include "vm/vm_map.h"
+#include "vm/vm_kern.h"
+#include "vm/vm_pager.h"
+
+#include "signalvar.h"
+#include "kinfo_proc.h"
 
 #ifdef HPUXCOMPAT
 
 #ifdef HPUXCOMPAT
-#include "../hpux/hpux_exec.h"
+#include "user.h"                      /* for pcb */
+#include "hp300/hpux/hpux_exec.h"
+#endif
+
+#ifdef COPY_SIGCODE
+extern char sigcode[], esigcode[];
+#define        szsigcode       (esigcode - sigcode)
+#else
+#define        szsigcode       0
 #endif
 
 /*
 #endif
 
 /*
- * exec system call, with and without environments.
+ * exec system call
  */
  */
-execv(p, uap, retval)
-       struct proc *p;
-       struct args {
-               char    *fname;
-               char    **argp;
-               char    **envp;
-       } *uap;
-       int *retval;
-{
-
-       uap->envp = NULL;
-       RETURN (execve(p, uap, retval));
-}
-
 /* ARGSUSED */
 execve(p, uap, retval)
        register struct proc *p;
 /* ARGSUSED */
 execve(p, uap, retval)
        register struct proc *p;
@@ -72,18 +60,18 @@ execve(p, uap, retval)
        } *uap;
        int *retval;
 {
        } *uap;
        int *retval;
 {
-       register nc;
+       register struct ucred *cred = p->p_ucred;
+       register struct filedesc *fdp = p->p_fd;
+       int na, ne, ucp, ap, cc, ssize;
        register char *cp;
        register char *cp;
-       register struct buf *bp;
-       struct buf *tbp;
-       int na, ne, ucp, ap, cc;
+       register int nc;
        unsigned len;
        int indir, uid, gid;
        char *sharg;
        struct vnode *vp;
        unsigned len;
        int indir, uid, gid;
        char *sharg;
        struct vnode *vp;
-       swblk_t bno;
+       int resid, error, paged = 0;
+       vm_offset_t execargs = 0;
        struct vattr vattr;
        struct vattr vattr;
-       char cfname[MAXCOMLEN + 1];
        char cfarg[MAXINTERP];
        union {
                char    ex_shell[MAXINTERP];    /* #! and interpreter name */
        char cfarg[MAXINTERP];
        union {
                char    ex_shell[MAXINTERP];    /* #! and interpreter name */
@@ -95,26 +83,21 @@ execve(p, uap, retval)
 #ifdef HPUXCOMPAT
        struct hpux_exec hhead;
 #endif
 #ifdef HPUXCOMPAT
        struct hpux_exec hhead;
 #endif
-       register struct ucred *cred = u.u_cred;
-       register struct nameidata *ndp = &u.u_nd;
-       int resid, error, flags = 0;
+       struct nameidata nd;
+       struct ps_strings ps;
 #ifdef SECSIZE
        extern long argdbsize;                  /* XXX */
 #endif SECSIZE
 
 #ifdef SECSIZE
        extern long argdbsize;                  /* XXX */
 #endif SECSIZE
 
-  start:
-       ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF;
-       ndp->ni_segflg = UIO_USERSPACE;
-       ndp->ni_dirp = uap->fname;
-       if (error = namei(ndp))
-               RETURN (error);
-       vp = ndp->ni_vp;
-       bno = 0;
-       bp = 0;
+       NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | SAVENAME, UIO_USERSPACE,
+               uap->fname, p);
+       if (error = namei(&nd))
+               return (error);
+       vp = nd.ni_vp;
        indir = 0;
        uid = cred->cr_uid;
        gid = cred->cr_gid;
        indir = 0;
        uid = cred->cr_uid;
        gid = cred->cr_gid;
-       if (error = VOP_GETATTR(vp, &vattr, cred))
+       if (error = VOP_GETATTR(vp, &vattr, cred, p))
                goto bad;
        if (vp->v_mount->mnt_flag & MNT_NOEXEC) {
                error = EACCES;
                goto bad;
        if (vp->v_mount->mnt_flag & MNT_NOEXEC) {
                error = EACCES;
@@ -128,9 +111,9 @@ execve(p, uap, retval)
        }
 
   again:
        }
 
   again:
-       if (error = VOP_ACCESS(vp, VEXEC, cred))
+       if (error = VOP_ACCESS(vp, VEXEC, cred, p))
                goto bad;
                goto bad;
-       if ((p->p_flag & STRC) && (error = VOP_ACCESS(vp, VREAD, cred)))
+       if ((p->p_flag & STRC) && (error = VOP_ACCESS(vp, VREAD, cred, p)))
                goto bad;
        if (vp->v_type != VREG ||
            (vattr.va_mode & (VEXEC|(VEXEC>>3)|(VEXEC>>6))) == 0) {
                goto bad;
        if (vp->v_type != VREG ||
            (vattr.va_mode & (VEXEC|(VEXEC>>3)|(VEXEC>>6))) == 0) {
@@ -154,7 +137,8 @@ execve(p, uap, retval)
         */
        exdata.ex_shell[0] = '\0';      /* for zero length files */
        error = vn_rdwr(UIO_READ, vp, (caddr_t)&exdata, sizeof (exdata),
         */
        exdata.ex_shell[0] = '\0';      /* for zero length files */
        error = vn_rdwr(UIO_READ, vp, (caddr_t)&exdata, sizeof (exdata),
-           (off_t)0, UIO_SYSSPACE, (IO_UNIT|IO_NODELOCKED), cred, &resid);
+           (off_t)0, UIO_SYSSPACE, (IO_UNIT|IO_NODELOCKED), cred, &resid,
+           (struct proc *)0);
        if (error)
                goto bad;
 #ifndef lint
        if (error)
                goto bad;
 #ifndef lint
@@ -202,7 +186,7 @@ execve(p, uap, retval)
                 * treated as an HPUX binary.
                 */
                if (exdata.ex_hexec.ha_version != BSDVNUM)
                 * treated as an HPUX binary.
                 */
                if (exdata.ex_hexec.ha_version != BSDVNUM)
-                       flags |= SHPUX;
+                       paged |= SHPUX;                         /* XXX */
                /*
                 * Shuffle important fields to their BSD locations.
                 * Note that the order in which this is done is important.
                /*
                 * Shuffle important fields to their BSD locations.
                 * Note that the order in which this is done is important.
@@ -231,13 +215,43 @@ execve(p, uap, retval)
        switch ((int)exdata.ex_exec.a_magic) {
 
        case OMAGIC:
        switch ((int)exdata.ex_exec.a_magic) {
 
        case OMAGIC:
+#ifdef COFF
+               if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) {
+                       error = ENOEXEC;
+                       goto bad;
+               }
+#endif
+#ifdef sparc
+               if (exdata.ex_exec.a_mid != MID_SUN_SPARC) {
+                       error = ENOEXEC;
+                       goto bad;
+               }
+#endif
                exdata.ex_exec.a_data += exdata.ex_exec.a_text;
                exdata.ex_exec.a_text = 0;
                break;
 
        case ZMAGIC:
                exdata.ex_exec.a_data += exdata.ex_exec.a_text;
                exdata.ex_exec.a_text = 0;
                break;
 
        case ZMAGIC:
-               flags |= SPAGV;
+#ifdef HPUXCOMPAT
+               paged |= 1;     /* XXX fix me */
+#else
+               paged = 1;
+#endif
+               /* FALLTHROUGH */
+
        case NMAGIC:
        case NMAGIC:
+#ifdef COFF
+               if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) {
+                       error = ENOEXEC;
+                       goto bad;
+               }
+#endif
+#ifdef sparc
+               if (exdata.ex_exec.a_mid != MID_SUN_SPARC) {
+                       error = ENOEXEC;
+                       goto bad;
+               }
+#endif
                if (exdata.ex_exec.a_text == 0) {
                        error = ENOEXEC;
                        goto bad;
                if (exdata.ex_exec.a_text == 0) {
                        error = ENOEXEC;
                        goto bad;
@@ -266,7 +280,7 @@ execve(p, uap, retval)
                cp = &exdata.ex_shell[2];
                while (*cp == ' ')
                        cp++;
                cp = &exdata.ex_shell[2];
                while (*cp == ' ')
                        cp++;
-               ndp->ni_dirp = cp;
+               nd.ni_dirp = cp;
                while (*cp && *cp != ' ')
                        cp++;
                cfarg[0] = '\0';
                while (*cp && *cp != ' ')
                        cp++;
                cfarg[0] = '\0';
@@ -279,36 +293,16 @@ execve(p, uap, retval)
                }
                indir = 1;
                vput(vp);
                }
                indir = 1;
                vput(vp);
-               ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF;
-               ndp->ni_segflg = UIO_SYSSPACE;
-               if (error = namei(ndp))
-                       RETURN (error);
-               vp = ndp->ni_vp;
-               if (error = VOP_GETATTR(vp, &vattr, cred))
+               nd.ni_segflg = UIO_SYSSPACE;
+               if (error = namei(&nd))
+                       return (error);
+               vp = nd.ni_vp;
+               if (error = VOP_GETATTR(vp, &vattr, cred, p))
                        goto bad;
                        goto bad;
-               bcopy((caddr_t)ndp->ni_dent.d_name, (caddr_t)cfname,
-                   MAXCOMLEN);
-               cfname[MAXCOMLEN] = '\0';
                uid = cred->cr_uid;     /* shell scripts can't be setuid */
                gid = cred->cr_gid;
                goto again;
        }
                uid = cred->cr_uid;     /* shell scripts can't be setuid */
                gid = cred->cr_gid;
                goto again;
        }
-       /*
-        * If the vnode has been modified since we last used it,
-        * then throw away all its pages and its text table entry.
-        */
-       if (vp->v_text && vp->v_text->x_mtime != vattr.va_mtime.tv_sec) {
-               /*
-                * Try once to release, if it is still busy
-                * take more drastic action.
-                */
-               xrele(vp);
-               if (vp->v_flag & VTEXT) {
-                       vput(vp);
-                       vgone(vp);
-                       goto start;
-               }
-       }
 
        /*
         * Collect arguments on "file" in swap space.
 
        /*
         * Collect arguments on "file" in swap space.
@@ -316,22 +310,13 @@ execve(p, uap, retval)
        na = 0;
        ne = 0;
        nc = 0;
        na = 0;
        ne = 0;
        nc = 0;
-       cc = 0;
-#ifdef SECSIZE
-       bno = rmalloc(argmap, (clrnd((int)btoc(NCARGS))) * CLBYTES / argdbsize);
-#else SECSIZE
-       bno = rmalloc(argmap, (long)ctod(clrnd((int)btoc(NCARGS))));
-#endif SECSIZE
-       if (bno == 0) {
-               swkill(p, "exec: no swap space");
-               goto bad;
-       }
-       if (bno % CLSIZE)
-               panic("execa rmalloc");
-#ifdef GENERIC
-       if (rootdev == dumpdev)
-               bno += 4096;
+       cc = NCARGS;
+       execargs = kmem_alloc_wait(exec_map, NCARGS);
+#ifdef DIAGNOSTIC
+       if (execargs == (vm_offset_t)0)
+               panic("execve: kmem_alloc_wait");
 #endif
 #endif
+       cp = (char *) execargs;
        /*
         * Copy arguments into file in argdev area.
         */
        /*
         * Copy arguments into file in argdev area.
         */
@@ -339,7 +324,7 @@ execve(p, uap, retval)
                ap = NULL;
                sharg = NULL;
                if (indir && na == 0) {
                ap = NULL;
                sharg = NULL;
                if (indir && na == 0) {
-                       sharg = cfname;
+                       sharg = nd.ni_cnd.cn_nameptr;
                        ap = (int)sharg;
                        uap->argp++;            /* ignore argv[0] */
                } else if (indir && (na == 1 && cfarg[0])) {
                        ap = (int)sharg;
                        uap->argp++;            /* ignore argv[0] */
                } else if (indir && (na == 1 && cfarg[0])) {
@@ -361,33 +346,12 @@ execve(p, uap, retval)
                na++;
                if (ap == -1) {
                        error = EFAULT;
                na++;
                if (ap == -1) {
                        error = EFAULT;
-                       if (bp) {
-                               brelse(bp);
-                               bp = 0;
-                       }
-                       goto badarg;
+                       goto bad;
                }
                do {
                }
                do {
-                       if (cc <= 0) {
-                               /*
-                                * We depend on NCARGS being a multiple of
-                                * CLBYTES.  This way we need only check
-                                * overflow before each buffer allocation.
-                                */
-                               if (nc >= NCARGS-1) {
-                                       error = E2BIG;
-                                       break;
-                               }
-                               if (bp)
-                                       bdwrite(bp);
-                               cc = CLBYTES;
-#ifdef SECSIZE
-                               bp = getblk(argdev, bno + nc / argdbsize, cc,
-                                   argdbsize);
-#else SECSIZE
-                               bp = getblk(argdev_vp, bno + ctod(nc/NBPG), cc);
-#endif SECSIZE
-                               cp = bp->b_un.b_addr;
+                       if (nc >= NCARGS-1) {
+                               error = E2BIG;
+                               break;
                        }
                        if (sharg) {
                                error = copystr(sharg, cp, (unsigned)cc, &len);
                        }
                        if (sharg) {
                                error = copystr(sharg, cp, (unsigned)cc, &len);
@@ -400,36 +364,50 @@ execve(p, uap, retval)
                        cp += len;
                        nc += len;
                        cc -= len;
                        cp += len;
                        nc += len;
                        cc -= len;
-               } while (error == ENOENT);
-               if (error) {
-                       if (bp)
-                               brelse(bp);
-                       bp = 0;
-                       goto badarg;
-               }
+               } while (error == ENAMETOOLONG);
+               if (error)
+                       goto bad;
        }
        }
-       if (bp)
-               bdwrite(bp);
-       bp = 0;
-       nc = (nc + NBPW-1) & ~(NBPW-1);
-       error = getxfile(p, vp, &exdata.ex_exec, flags, nc + (na+4)*NBPW,
-           uid, gid);
-       if (error) {
-badarg:
-               for (cc = 0; cc < nc; cc += CLBYTES) {
-                       (void) baddr(argdev_vp, bno + ctod(cc/NBPG),
-                               CLBYTES, NOCRED, &tbp);
-                       bp = tbp;
-#endif SECSIZE
-                       if (bp) {
-                               bp->b_flags |= B_INVAL;         /* throw away */
-                               brelse(bp);
-                               bp = 0;
-                       }
-               }
+
+       /*
+        * XXX the following is excessively bogus
+        *
+        * Compute initial process stack size and location of argc
+        * and character strings.  `nc' is currently just the number
+        * of characters of arg and env strings.
+        *
+        * nc = size of ps_strings structure +
+        *      size of signal code +
+        *      4 bytes of NULL pointer +
+        *      nc,
+        * rounded to nearest integer;
+        * ucp = USRSTACK - nc;         [user characters pointer]
+        * apsize = padding (if any) +
+        *      4 bytes of NULL pointer +
+        *      ne 4-byte pointers to env strings +
+        *      4 bytes of NULL pointer +
+        *      (na-ne) 4-byte pointers to arg strings +
+        *      4 bytes of argc;
+        * (this is the same as nc + (na+3)*4)
+        * ap = ucp - apsize;   [user address of argc]
+        * ssize = ssize + nc + machine-dependent space;
+        */
+       nc = (sizeof(ps) + szsigcode + 4 + nc + NBPW-1) & ~(NBPW - 1);
+#ifdef sparc
+       ucp = USRSTACK;
+       ssize = (nc + (na + 3) * NBPW + 7) & ~7;
+       ap = ucp - ssize;
+       ucp -= nc;
+       ssize += sizeof(struct rwindow);
+#else
+       ssize = (na + 3) * NBPW;
+       ucp = USRSTACK - nc;
+       ap = ucp - ssize;
+       ssize += nc;
+#endif
+       error = getxfile(p, vp, &exdata.ex_exec, paged, ssize, uid, gid);
+       if (error)
                goto bad;
                goto bad;
-       }
-       vp->v_text->x_mtime = vattr.va_mtime.tv_sec;
        vput(vp);
        vp = NULL;
 
        vput(vp);
        vp = NULL;
 
@@ -438,244 +416,319 @@ badarg:
         * We are now committed to the exec so we can save the exec
         * header in the pcb where we can dump it if necessary in core()
         */
         * We are now committed to the exec so we can save the exec
         * header in the pcb where we can dump it if necessary in core()
         */
-       if (u.u_pcb.pcb_flags & PCB_HPUXBIN)
+       if (p->p_addr->u_pcb.pcb_flags & PCB_HPUXBIN)
                bcopy((caddr_t)&hhead,
                bcopy((caddr_t)&hhead,
-                     (caddr_t)u.u_pcb.pcb_exec, sizeof hhead);
+                     (caddr_t)p->p_addr->u_pcb.pcb_exec, sizeof hhead);
 #endif
 
        /*
         * Copy back arglist.
         */
 #endif
 
        /*
         * Copy back arglist.
         */
-       ucp = USRSTACK - nc - NBPW;
-       ap = ucp - na*NBPW - 3*NBPW;
-       u.u_ar0[SP] = ap;
+       cpu_setstack(p, ap);
        (void) suword((caddr_t)ap, na-ne);
        nc = 0;
        (void) suword((caddr_t)ap, na-ne);
        nc = 0;
-       cc = 0;
+       cp = (char *) execargs;
+       cc = NCARGS;
+       ps.ps_argvstr = (char *)ucp;    /* first argv string */
+       ps.ps_nargvstr = na - ne;       /* argc */
        for (;;) {
                ap += NBPW;
                if (na == ne) {
                        (void) suword((caddr_t)ap, 0);
                        ap += NBPW;
        for (;;) {
                ap += NBPW;
                if (na == ne) {
                        (void) suword((caddr_t)ap, 0);
                        ap += NBPW;
+                       ps.ps_envstr = (char *)ucp;
+                       ps.ps_nenvstr = ne;
                }
                if (--na < 0)
                        break;
                (void) suword((caddr_t)ap, ucp);
                do {
                }
                if (--na < 0)
                        break;
                (void) suword((caddr_t)ap, ucp);
                do {
-                       if (cc <= 0) {
-                               if (bp)
-                                       brelse(bp);
-                               cc = CLBYTES;
-#ifdef SECSIZE
-                               bp = bread(argdev, bno + nc / argdbsize, cc,
-                                   argdbsize);
-#else SECSIZE
-                               error = bread(argdev_vp,
-                                   (daddr_t)(bno + ctod(nc / NBPG)), cc,
-                                   NOCRED, &tbp);
-                               bp = tbp;
-#endif SECSIZE
-                               bp->b_flags |= B_INVAL;         /* throw away */
-                               cp = bp->b_un.b_addr;
-                       }
                        error = copyoutstr(cp, (caddr_t)ucp, (unsigned)cc,
                            &len);
                        ucp += len;
                        cp += len;
                        nc += len;
                        cc -= len;
                        error = copyoutstr(cp, (caddr_t)ucp, (unsigned)cc,
                            &len);
                        ucp += len;
                        cp += len;
                        nc += len;
                        cc -= len;
-               } while (error == ENOENT);
+               } while (error == ENAMETOOLONG);
                if (error == EFAULT)
                        panic("exec: EFAULT");
        }
        (void) suword((caddr_t)ap, 0);
                if (error == EFAULT)
                        panic("exec: EFAULT");
        }
        (void) suword((caddr_t)ap, 0);
+       (void) copyout((caddr_t)&ps, (caddr_t)PS_STRINGS, sizeof(ps));
 
        execsigs(p);
 
 
        execsigs(p);
 
-       for (nc = u.u_lastfile; nc >= 0; --nc) {
-               if (u.u_pofile[nc] & UF_EXCLOSE) {
-                       (void) closef(u.u_ofile[nc]);
-                       u.u_ofile[nc] = NULL;
-                       u.u_pofile[nc] = 0;
+       for (nc = fdp->fd_lastfile; nc >= 0; --nc) {
+               if (fdp->fd_ofileflags[nc] & UF_EXCLOSE) {
+                       (void) closef(fdp->fd_ofiles[nc], p);
+                       fdp->fd_ofiles[nc] = NULL;
+                       fdp->fd_ofileflags[nc] = 0;
+                       if (nc < fdp->fd_freefile)
+                               fdp->fd_freefile = nc;
                }
                }
-               u.u_pofile[nc] &= ~UF_MAPPED;
+               fdp->fd_ofileflags[nc] &= ~UF_MAPPED;
        }
        }
-       while (u.u_lastfile >= 0 && u.u_ofile[u.u_lastfile] == NULL)
-               u.u_lastfile--;
-       setregs(exdata.ex_exec.a_entry, retval);
+       /*
+        * Adjust fd_lastfile to account for descriptors closed above.
+        * Don't decrement fd_lastfile past 0, as it's unsigned.
+        */
+       while (fdp->fd_lastfile > 0 && fdp->fd_ofiles[fdp->fd_lastfile] == NULL)
+               fdp->fd_lastfile--;
+       setregs(p, exdata.ex_exec.a_entry, retval);
+#ifdef COPY_SIGCODE
+       /*
+        * Install sigcode at top of user stack.
+        */
+       copyout((caddr_t)sigcode, (caddr_t)PS_STRINGS - szsigcode, szsigcode);
+#endif
        /*
         * Remember file name for accounting.
         */
        /*
         * Remember file name for accounting.
         */
-       u.u_acflag &= ~AFORK;
-       if (indir)
-               bcopy((caddr_t)cfname, (caddr_t)p->p_comm, MAXCOMLEN);
-       else {
-               if (ndp->ni_dent.d_namlen > MAXCOMLEN)
-                       ndp->ni_dent.d_namlen = MAXCOMLEN;
-               bcopy((caddr_t)ndp->ni_dent.d_name, (caddr_t)p->p_comm,
-                   (unsigned)(ndp->ni_dent.d_namlen + 1));
-       }
+       p->p_acflag &= ~AFORK;
+       if (nd.ni_cnd.cn_namelen > MAXCOMLEN)
+               nd.ni_cnd.cn_namelen = MAXCOMLEN;
+       bcopy((caddr_t)nd.ni_cnd.cn_nameptr, (caddr_t)p->p_comm,
+           (unsigned)nd.ni_cnd.cn_namelen);
+       p->p_comm[nd.ni_cnd.cn_namelen] = '\0';
+       cpu_exec(p);
 bad:
 bad:
-       if (bp)
-               brelse(bp);
-       if (bno)
-#ifdef SECSIZE
-               rmfree(argmap, (clrnd((int)btoc(NCARGS))) * CLBYTES / argdbsize,
-                   bno);
-#else SECSIZE
-               rmfree(argmap, (long)ctod(clrnd((int) btoc(NCARGS))), bno);
+       FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
+       if (execargs)
+               kmem_free_wakeup(exec_map, execargs, NCARGS);
 #endif SECSIZE
        if (vp)
                vput(vp);
 #endif SECSIZE
        if (vp)
                vput(vp);
-       RETURN (error);
+       return (error);
 }
 
 /*
  * Read in and set up memory for executed file.
  */
 }
 
 /*
  * Read in and set up memory for executed file.
  */
-getxfile(p, vp, ep, flags, nargc, uid, gid)
+getxfile(p, vp, ep, paged, ssize, uid, gid)
        register struct proc *p;
        register struct vnode *vp;
        register struct exec *ep;
        register struct proc *p;
        register struct vnode *vp;
        register struct exec *ep;
-       int flags, nargc, uid, gid;
+       int paged, ssize, uid, gid;
 {
 {
-       segsz_t ts, ds, ids, uds, ss;
-       register struct ucred *cred = u.u_cred;
+       register struct ucred *cred = p->p_ucred;
+       register struct vmspace *vm = p->p_vmspace;
+       vm_offset_t addr;
+       vm_size_t xts, size;
+       segsz_t ds;
        off_t toff;
        off_t toff;
-       int error;
+       int error = 0;
 
 #ifdef HPUXCOMPAT
 
 #ifdef HPUXCOMPAT
+       int hpux = (paged & SHPUX);
+       paged &= ~SHPUX;
        if (ep->a_mid == MID_HPUX)
        if (ep->a_mid == MID_HPUX)
-               toff = sizeof (struct hpux_exec);
+               toff = paged ? CLBYTES : sizeof(struct hpux_exec);
        else
 #endif
        else
 #endif
-       toff = sizeof (struct exec);
-       if (vp->v_text && (vp->v_text->x_flag & XTRC))
-               return (ETXTBSY);
+#ifdef COFF
+       toff = N_TXTOFF(*ep);
+#else
+#ifdef sparc
+       if (ep->a_mid == MID_SUN_SPARC)
+               toff = paged ? 0 : sizeof(struct exec);
+       else
+#endif
+       if (paged)
+               toff = CLBYTES;
+       else
+               toff = sizeof (struct exec);
+#endif
        if (ep->a_text != 0 && (vp->v_flag & VTEXT) == 0 &&
        if (ep->a_text != 0 && (vp->v_flag & VTEXT) == 0 &&
-           vp->v_usecount != 1) {
-               register struct file *fp;
-
-               for (fp = file; fp < fileNFILE; fp++) {
-                       if (fp->f_type == DTYPE_VNODE &&
-                           fp->f_count > 0 &&
-                           (struct vnode *)fp->f_data == vp &&
-                           (fp->f_flag & FWRITE)) {
-                               return (ETXTBSY);
-                       }
-               }
-       }
+           vp->v_writecount != 0)
+               return (ETXTBSY);
 
        /*
         * Compute text and data sizes and make sure not too large.
 
        /*
         * Compute text and data sizes and make sure not too large.
-        * NB - Check data and bss separately as they may overflow 
-        * when summed together.
+        * Text size is rounded to an ``ld page''; data+bss is left
+        * in machine pages.  Check data and bss separately as they
+        * may overflow when summed together.  (XXX not done yet)
         */
         */
-       ts = clrnd(btoc(ep->a_text));
-       ids = clrnd(btoc(ep->a_data));
-       uds = clrnd(btoc(ep->a_bss));
+       xts = roundup(ep->a_text, __LDPGSZ);
        ds = clrnd(btoc(ep->a_data + ep->a_bss));
        ds = clrnd(btoc(ep->a_data + ep->a_bss));
-       ss = clrnd(SSIZE + btoc(nargc));
-       if (error =
-           chksize((unsigned)ts, (unsigned)ids, (unsigned)uds, (unsigned)ss))
-               return (error);
 
        /*
 
        /*
-        * Make sure enough space to start process.
+        * If we're sharing the address space, allocate a new space
+        * and release our reference to the old one.  Otherwise,
+        * empty out the existing vmspace.
         */
         */
-       u.u_cdmap = zdmap;
-       u.u_csmap = zdmap;
-       if (error = swpexpand(ds, ss, &u.u_cdmap, &u.u_csmap))
-               return (error);
-
-       /*
-        * At this point, we are committed to the new image!
-        * Release virtual memory resources of old process, and
-        * initialize the virtual memory of the new process.
-        * If we resulted from vfork(), instead wakeup our
-        * parent who will set SVFDONE when he has taken back
-        * our resources.
-        */
-       if ((p->p_flag & SVFORK) == 0) {
-#ifdef MAPMEM
-               if (u.u_mmap && (error = mmexec(p)))
-                       return (error);
+#ifdef sparc
+       kill_user_windows(p);           /* before addrs go away */
 #endif
 #endif
-               vrelvm();
+       if (vm->vm_refcnt > 1) {
+               p->p_vmspace = vmspace_alloc(VM_MIN_ADDRESS,
+                   VM_MAXUSER_ADDRESS, 1);
+               vmspace_free(vm);
+               vm = p->p_vmspace;
        } else {
        } else {
-               p->p_flag &= ~SVFORK;
-               p->p_flag |= SKEEP;
-               wakeup((caddr_t)p);
-               while ((p->p_flag & SVFDONE) == 0)
-                       sleep((caddr_t)p, PZERO - 1);
-               p->p_flag &= ~(SVFDONE|SKEEP);
+#ifdef SYSVSHM
+               if (vm->vm_shm)
+                       shmexit(p);
+#endif
+               (void) vm_map_remove(&vm->vm_map, VM_MIN_ADDRESS,
+                   VM_MAXUSER_ADDRESS);
+       }
+       /*
+        * If parent is waiting for us to exec or exit,
+        * SPPWAIT will be set; clear it and wakeup parent.
+        */
+       if (p->p_flag & SPPWAIT) {
+               p->p_flag &= ~SPPWAIT;
+               wakeup((caddr_t) p->p_pptr);
        }
        }
-#ifdef hp300
-       u.u_pcb.pcb_flags &= ~(PCB_AST|PCB_HPUXMMAP|PCB_HPUXBIN);
 #ifdef HPUXCOMPAT
 #ifdef HPUXCOMPAT
+       p->p_addr->u_pcb.pcb_flags &= ~(PCB_HPUXMMAP|PCB_HPUXBIN);
        /* remember that we were loaded from an HPUX format file */
        if (ep->a_mid == MID_HPUX)
        /* remember that we were loaded from an HPUX format file */
        if (ep->a_mid == MID_HPUX)
-               u.u_pcb.pcb_flags |= PCB_HPUXBIN;
-#endif
+               p->p_addr->u_pcb.pcb_flags |= PCB_HPUXBIN;
+       if (hpux)
+               p->p_flag |= SHPUX;
+       else
+               p->p_flag &= ~SHPUX;
 #endif
 #endif
-       p->p_flag &= ~(SPAGV|SSEQL|SUANOM|SHPUX);
-       p->p_flag |= flags | SEXEC;
-       u.u_dmap = u.u_cdmap;
-       u.u_smap = u.u_csmap;
-       vgetvm(ts, ds, ss);
-
-       if ((flags & SPAGV) == 0)
-               (void) vn_rdwr(UIO_READ, vp,
-                       (char *)ctob(dptov(p, 0)),
-                       (int)ep->a_data,
-                       (off_t)(toff + ep->a_text),
-                       UIO_USERSPACE, (IO_UNIT|IO_NODELOCKED), cred, (int *)0);
-       xalloc(vp, ep, toff, cred);
-#if defined(tahoe)
+#ifdef ULTRIXCOMPAT
        /*
        /*
-        * Define new keys.
+        * Always start out as an ULTRIX process.
+        * A system call in crt0.o will change us to BSD system calls later.
         */
         */
-       if (p->p_textp == 0) {  /* use existing code key if shared */
-               ckeyrelease(p->p_ckey);
-               p->p_ckey = getcodekey();
+       p->p_md.md_flags |= MDP_ULTRIX;
+#endif
+       p->p_flag |= SEXEC;
+#ifndef COFF
+       addr = VM_MIN_ADDRESS;
+       if (vm_allocate(&vm->vm_map, &addr, xts + ctob(ds), FALSE)) {
+               uprintf("Cannot allocate text+data space\n");
+               error = ENOMEM;                 /* XXX */
+               goto badmap;
+       }
+       vm->vm_taddr = (caddr_t)VM_MIN_ADDRESS;
+       vm->vm_daddr = (caddr_t)(VM_MIN_ADDRESS + xts);
+#else /* COFF */
+       addr = (vm_offset_t)ep->ex_aout.codeStart;
+       vm->vm_taddr = (caddr_t)addr;
+       if (vm_allocate(&vm->vm_map, &addr, xts, FALSE)) {
+               uprintf("Cannot allocate text space\n");
+               error = ENOMEM;                 /* XXX */
+               goto badmap;
+       }
+       addr = (vm_offset_t)ep->ex_aout.heapStart;
+       vm->vm_daddr = (caddr_t)addr;
+       if (vm_allocate(&vm->vm_map, &addr, round_page(ctob(ds)), FALSE)) {
+               uprintf("Cannot allocate data space\n");
+               error = ENOMEM;                 /* XXX */
+               goto badmap;
        }
        }
-       mtpr(CCK, p->p_ckey);
-       dkeyrelease(p->p_dkey);
-       p->p_dkey = getdatakey();
-       mtpr(DCK, p->p_dkey);
+#endif /* COFF */
+       size = round_page(MAXSSIZ);             /* XXX */
+#ifdef i386
+       addr = trunc_page(USRSTACK - size) - NBPG;      /* XXX */
+#else
+       addr = trunc_page(USRSTACK - size);
 #endif
 #endif
-       if ((flags & SPAGV) && p->p_textp)
-               vinifod(p, (struct fpte *)dptopte(p, 0),
-                   PG_FTEXT, p->p_textp->x_vptr,
-                   (long)(1 + ts/CLSIZE), (segsz_t)btoc(ep->a_data));
+       if (vm_allocate(&vm->vm_map, &addr, size, FALSE)) {
+               uprintf("Cannot allocate stack space\n");
+               error = ENOMEM;                 /* XXX */
+               goto badmap;
+       }
+       size -= round_page(p->p_rlimit[RLIMIT_STACK].rlim_cur);
+       if (vm_map_protect(&vm->vm_map, addr, addr+size, VM_PROT_NONE, FALSE)) {
+               uprintf("Cannot protect stack space\n");
+               error = ENOMEM;
+               goto badmap;
+       }
+       vm->vm_maxsaddr = (caddr_t)addr;
 
 
-#if defined(vax) || defined(tahoe)
-       /* THIS SHOULD BE DONE AT A LOWER LEVEL, IF AT ALL */
-       mtpr(TBIA, 0);
-#endif
-#ifdef hp300
-       TBIAU();
-#endif
+       if (paged == 0) {
+               /*
+                * Read in data segment.
+                */
+               (void) vn_rdwr(UIO_READ, vp, vm->vm_daddr, (int) ep->a_data,
+                       (off_t)(toff + ep->a_text), UIO_USERSPACE,
+                       (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p);
+               /*
+                * Read in text segment if necessary (0410),
+                * and read-protect it.
+                */
+               if (ep->a_text > 0) {
+                       error = vn_rdwr(UIO_READ, vp, vm->vm_taddr,
+                           (int)ep->a_text, toff, UIO_USERSPACE,
+                           (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p);
+                       (void) vm_map_protect(&vm->vm_map,
+                           (vm_offset_t)vm->vm_taddr,
+                           (vm_offset_t)vm->vm_taddr + trunc_page(ep->a_text),
+                           VM_PROT_READ|VM_PROT_EXECUTE, FALSE);
+               }
+       } else {
+               /*
+                * Allocate a region backed by the exec'ed vnode.
+                */
+#ifndef COFF
+               addr = VM_MIN_ADDRESS;
+               size = round_page(xts + ep->a_data);
+               error = vm_mmap(&vm->vm_map, &addr, size, VM_PROT_ALL,
+                       MAP_FILE|MAP_COPY|MAP_FIXED,
+                       (caddr_t)vp, (vm_offset_t)toff);
+               (void) vm_map_protect(&vm->vm_map, addr, addr + xts,
+                       VM_PROT_READ|VM_PROT_EXECUTE, FALSE);
+#else /* COFF */
+               addr = (vm_offset_t)vm->vm_taddr;
+               size = xts;
+               error = vm_mmap(&vm->vm_map, &addr, size,
+                       VM_PROT_READ|VM_PROT_EXECUTE,
+                       MAP_FILE|MAP_COPY|MAP_FIXED,
+                       (caddr_t)vp, (vm_offset_t)toff);
+               toff += size;
+               addr = (vm_offset_t)vm->vm_daddr;
+               size = round_page(ep->a_data);
+               error = vm_mmap(&vm->vm_map, &addr, size, VM_PROT_ALL,
+                       MAP_FILE|MAP_COPY|MAP_FIXED,
+                       (caddr_t)vp, (vm_offset_t)toff);
+#endif /* COFF */
+               vp->v_flag |= VTEXT;
+       }
+       if (error) {
+badmap:
+               printf("pid %d: VM allocation failure\n", p->p_pid);
+               uprintf("sorry, pid %d was killed in exec: VM allocation\n",
+                       p->p_pid);
+               psignal(p, SIGKILL);
+               p->p_flag |= SKEEP;
+               return(error);
+       }
 
        /*
         * set SUID/SGID protections, if no tracing
         */
        if ((p->p_flag&STRC)==0) {
 
        /*
         * set SUID/SGID protections, if no tracing
         */
        if ((p->p_flag&STRC)==0) {
-               if (uid != cred->cr_uid || gid != cred->cr_gid)
-                       u.u_cred = cred = crcopy(cred);
-               cred->cr_uid = uid;
-               cred->cr_gid = gid;
-               p->p_uid = uid;
+               if (uid != cred->cr_uid || gid != cred->cr_gid) {
+                       p->p_ucred = cred = crcopy(cred);
+                       /*
+                        * If process is being ktraced, turn off - unless
+                        * root set it.
+                        */
+                       if (p->p_tracep && !(p->p_traceflag & KTRFAC_ROOT)) {
+                               vrele(p->p_tracep);
+                               p->p_tracep = NULL;
+                               p->p_traceflag = 0;
+                       }
+                       cred->cr_uid = uid;
+                       cred->cr_gid = gid;
+               }
        } else
                psignal(p, SIGTRAP);
        } else
                psignal(p, SIGTRAP);
-       p->p_svuid = p->p_uid;
-       p->p_svgid = cred->cr_gid;
-       u.u_tsize = ts;
-       u.u_dsize = ds;
-       u.u_ssize = ss;
-       u.u_prof.pr_scale = 0;
+       p->p_cred->p_svuid = cred->cr_uid;
+       p->p_cred->p_svgid = cred->cr_gid;
+       vm->vm_tsize = btoc(xts);
+       vm->vm_dsize = ds;
+       vm->vm_ssize = ssize;
+       p->p_stats->p_prof.pr_scale = 0;
 #if defined(tahoe)
 #if defined(tahoe)
-       u.u_pcb.pcb_savacc.faddr = (float *)NULL;
+       /* move this when tahoe cpu_exec is created */
+       p->p_addr->u_pcb.pcb_savacc.faddr = (float *)NULL;
 #endif
        return (0);
 }
 #endif
        return (0);
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.