/* $OpenBSD: ibcs2_exec.c,v 1.10 1999/11/10 15:55:21 mickey Exp $ */ /* $NetBSD: ibcs2_exec.c,v 1.12 1996/10/12 02:13:52 thorpej Exp $ */ /* * Copyright (c) 1994, 1995 Scott Bartram * Copyright (c) 1994 Adam Glass * Copyright (c) 1993, 1994 Christopher G. Demetriou * All rights reserved. * * originally from kern/exec_ecoff.c * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Scott Bartram. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include int exec_ibcs2_coff_prep_omagic __P((struct proc *, struct exec_package *, struct coff_filehdr *, struct coff_aouthdr *)); int exec_ibcs2_coff_prep_nmagic __P((struct proc *, struct exec_package *, struct coff_filehdr *, struct coff_aouthdr *)); int exec_ibcs2_coff_prep_zmagic __P((struct proc *, struct exec_package *, struct coff_filehdr *, struct coff_aouthdr *)); int exec_ibcs2_coff_setup_stack __P((struct proc *, struct exec_package *)); void cpu_exec_ibcs2_coff_setup __P((int, struct proc *, struct exec_package *, void *)); int exec_ibcs2_xout_prep_nmagic __P((struct proc *, struct exec_package *, struct xexec *, struct xext *)); int exec_ibcs2_xout_prep_zmagic __P((struct proc *, struct exec_package *, struct xexec *, struct xext *)); int exec_ibcs2_xout_setup_stack __P((struct proc *, struct exec_package *)); int coff_load_shlib __P((struct proc *, char *, struct exec_package *)); static int coff_find_section __P((struct proc *, struct vnode *, struct coff_filehdr *, struct coff_scnhdr *, int)); extern int bsd2ibcs_errno[]; extern struct sysent ibcs2_sysent[]; #ifdef SYSCALL_DEBUG extern char *ibcs2_syscallnames[]; #endif extern void ibcs2_sendsig __P((sig_t, int, int, u_long, int, union sigval)); extern char sigcode[], esigcode[]; const char ibcs2_emul_path[] = "/emul/ibcs2"; struct emul emul_ibcs2 = { "ibcs2", bsd2ibcs_errno, ibcs2_sendsig, 0, IBCS2_SYS_MAXSYSCALL, ibcs2_sysent, #ifdef SYSCALL_DEBUG ibcs2_syscallnames, #else NULL, #endif 0, copyargs, setregs, NULL, sigcode, esigcode, }; /* * exec_ibcs2_coff_makecmds(): Check if it's an coff-format executable. * * Given a proc pointer and an exec package pointer, see if the referent * of the epp is in coff format. Check 'standard' magic numbers for * this architecture. If that fails, return failure. * * This function is responsible for creating a set of vmcmds which can be * used to build the process's vm space and inserting them into the exec * package. */ int exec_ibcs2_coff_makecmds(p, epp) struct proc *p; struct exec_package *epp; { int error; struct coff_filehdr *fp = epp->ep_hdr; struct coff_aouthdr *ap; if (epp->ep_hdrvalid < COFF_HDR_SIZE) return ENOEXEC; if (COFF_BADMAG(fp)) return ENOEXEC; ap = epp->ep_hdr + sizeof(struct coff_filehdr); switch (ap->a_magic) { case COFF_OMAGIC: error = exec_ibcs2_coff_prep_omagic(p, epp, fp, ap); break; case COFF_NMAGIC: error = exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap); break; case COFF_ZMAGIC: error = exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap); break; default: return ENOEXEC; } if (error == 0) epp->ep_emul = &emul_ibcs2; if (error) kill_vmcmds(&epp->ep_vmcmds); return error; } /* * exec_ibcs2_coff_setup_stack(): Set up the stack segment for a coff * executable. * * Note that the ep_ssize parameter must be set to be the current stack * limit; this is adjusted in the body of execve() to yield the * appropriate stack segment usage once the argument length is * calculated. * * This function returns an int for uniformity with other (future) formats' * stack setup functions. They might have errors to return. */ int exec_ibcs2_coff_setup_stack(p, epp) struct proc *p; struct exec_package *epp; { /* DPRINTF(("enter exec_ibcs2_coff_setup_stack\n")); */ epp->ep_maxsaddr = USRSTACK - MAXSSIZ; epp->ep_minsaddr = USRSTACK; epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur; /* * set up commands for stack. note that this takes *two*, one to * map the part of the stack which we can access, and one to map * the part which we can't. * * arguably, it could be made into one, but that would require the * addition of another mapping proc, which is unnecessary * * note that in memory, things assumed to be: 0 ....... ep_maxsaddr * ep_minsaddr */ /* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_maxsaddr, (epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr), epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE); /* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_minsaddr - epp->ep_ssize, epp->ep_ssize)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize, (epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return 0; } /* * exec_ibcs2_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package */ int exec_ibcs2_coff_prep_omagic(p, epp, fp, ap) struct proc *p; struct exec_package *epp; struct coff_filehdr *fp; struct coff_aouthdr *ap; { epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart); epp->ep_tsize = ap->a_tsize; epp->ep_daddr = COFF_SEGMENT_ALIGN(ap, ap->a_dstart); epp->ep_dsize = ap->a_dsize; epp->ep_entry = ap->a_entry; /* set up command for text and data segments */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, ap->a_tsize + ap->a_dsize, epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ if (ap->a_bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize, COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize), NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return exec_ibcs2_coff_setup_stack(p, epp); } /* * exec_ibcs2_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec * package. */ int exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap) struct proc *p; struct exec_package *epp; struct coff_filehdr *fp; struct coff_aouthdr *ap; { epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart); epp->ep_tsize = ap->a_tsize; epp->ep_daddr = COFF_ROUND(ap->a_dstart, COFF_LDPGSZ); epp->ep_dsize = ap->a_dsize; epp->ep_entry = ap->a_entry; /* set up command for text segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize, epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap), VM_PROT_READ|VM_PROT_EXECUTE); /* set up command for data segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_dsize, epp->ep_daddr, epp->ep_vp, COFF_DATOFF(fp, ap), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ if (ap->a_bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize, COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize), NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return exec_ibcs2_coff_setup_stack(p, epp); } /* * coff_find_section - load specified section header * * TODO - optimize by reading all section headers in at once */ static int coff_find_section(p, vp, fp, sh, s_type) struct proc *p; struct vnode *vp; struct coff_filehdr *fp; struct coff_scnhdr *sh; int s_type; { int i, pos, error; size_t siz, resid; pos = COFF_HDR_SIZE; for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) { siz = sizeof(struct coff_scnhdr); error = vn_rdwr(UIO_READ, vp, (caddr_t) sh, siz, pos, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p); if (error) { DPRINTF(("section hdr %d read error %d\n", i, error)); return error; } siz -= resid; if (siz != sizeof(struct coff_scnhdr)) { DPRINTF(("incomplete read: hdr %d ask=%d, rem=%u got %u\n", s_type, sizeof(struct coff_scnhdr), resid, siz)); return ENOEXEC; } /* DPRINTF(("found section: %x\n", sh->s_flags)); */ if (sh->s_flags == s_type) return 0; } return ENOEXEC; } /* * exec_ibcs2_coff_prep_zmagic(): Prepare a COFF ZMAGIC binary's exec package * * First, set the various offsets/lengths in the exec package. * * Then, mark the text image busy (so it can be demand paged) or error * out if this is not possible. Finally, set up vmcmds for the * text, data, bss, and stack segments. */ int exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap) struct proc *p; struct exec_package *epp; struct coff_filehdr *fp; struct coff_aouthdr *ap; { int error; u_long offset; long dsize, baddr, bsize; struct coff_scnhdr sh; /* DPRINTF(("enter exec_ibcs2_coff_prep_zmagic\n")); */ /* set up command for text segment */ error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_TEXT); if (error) { DPRINTF(("can't find text section: %d\n", error)); return error; } /* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr, sh.s_size, sh.s_scnptr)); */ epp->ep_taddr = COFF_ALIGN(sh.s_vaddr); offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_taddr); epp->ep_tsize = sh.s_size + (sh.s_vaddr - epp->ep_taddr); #ifdef notyet /* * check if vnode is in open for writing, because we want to * demand-page out of it. if it is, don't do it, for various * reasons n */ if ((ap->a_tsize != 0 || ap->a_dsize != 0) && epp->ep_vp->v_writecount != 0) { #ifdef DIAGNOSTIC if (epp->ep_vp->v_flag & VTEXT) panic("exec: a VTEXT vnode has writecount != 0"); #endif return ETXTBSY; } epp->ep_vp->v_flag |= VTEXT; #endif /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr, epp->ep_tsize, offset)); */ #ifdef notyet NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, epp->ep_tsize, epp->ep_taddr, epp->ep_vp, offset, VM_PROT_READ|VM_PROT_EXECUTE); #else NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize, epp->ep_taddr, epp->ep_vp, offset, VM_PROT_READ|VM_PROT_EXECUTE); #endif /* set up command for data segment */ error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_DATA); if (error) { DPRINTF(("can't find data section: %d\n", error)); return error; } /* DPRINTF(("COFF data addr %x size %d offset %d\n", sh.s_vaddr, sh.s_size, sh.s_scnptr)); */ epp->ep_daddr = COFF_ALIGN(sh.s_vaddr); offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_daddr); dsize = sh.s_size + (sh.s_vaddr - epp->ep_daddr); epp->ep_dsize = dsize + ap->a_bsize; /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr, dsize, offset)); */ #ifdef notyet NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, dsize, epp->ep_daddr, epp->ep_vp, offset, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); #else NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, dsize, epp->ep_daddr, epp->ep_vp, offset, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); #endif /* set up command for bss segment */ baddr = round_page(epp->ep_daddr + dsize); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) { /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", baddr, bsize, 0)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); } /* load any shared libraries */ error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB); if (!error) { size_t resid; struct coff_slhdr *slhdr; char buf[128], *bufp; /* FIXME */ int len = sh.s_size, path_index, entry_len; /* DPRINTF(("COFF shlib size %d offset %d\n", sh.s_size, sh.s_scnptr)); */ error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t) buf, len, sh.s_scnptr, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p); if (error) { DPRINTF(("shlib section read error %d\n", error)); return ENOEXEC; } bufp = buf; while (len) { slhdr = (struct coff_slhdr *)bufp; path_index = slhdr->path_index * sizeof(long); entry_len = slhdr->entry_len * sizeof(long); /* DPRINTF(("path_index: %d entry_len: %d name: %s\n", path_index, entry_len, slhdr->sl_name)); */ error = coff_load_shlib(p, slhdr->sl_name, epp); if (error) return ENOEXEC; bufp += entry_len; len -= entry_len; } } /* set up entry point */ epp->ep_entry = ap->a_entry; #if 0 DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n", epp->ep_taddr, epp->ep_tsize, epp->ep_daddr, epp->ep_dsize, epp->ep_entry)); #endif return exec_ibcs2_coff_setup_stack(p, epp); } int coff_load_shlib(p, path, epp) struct proc *p; char *path; struct exec_package *epp; { int error, taddr, tsize, daddr, dsize, offset; size_t siz, resid; struct nameidata nd; struct coff_filehdr fh, *fhp = &fh; struct coff_scnhdr sh, *shp = &sh; caddr_t sg = stackgap_init(p->p_emul); /* * 1. open shlib file * 2. read filehdr * 3. map text, data, and bss out of it using VM_* */ IBCS2_CHECK_ALT_EXIST(p, &sg, path); NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p); /* first get the vnode */ if ((error = namei(&nd)) != 0) { DPRINTF(("coff_load_shlib: can't find library %s\n", path)); return error; } siz = sizeof(struct coff_filehdr); error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t) fhp, siz, 0, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p); if (error) { DPRINTF(("filehdr read error %d\n", error)); vrele(nd.ni_vp); return error; } siz -= resid; if (siz != sizeof(struct coff_filehdr)) { DPRINTF(("coff_load_shlib: incomplete read: ask=%d, rem=%u got %u\n", sizeof(struct coff_filehdr), resid, siz)); vrele(nd.ni_vp); return ENOEXEC; } /* load text */ error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_TEXT); if (error) { DPRINTF(("can't find shlib text section\n")); vrele(nd.ni_vp); return error; } /* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr, sh.s_size, sh.s_scnptr)); */ taddr = COFF_ALIGN(shp->s_vaddr); offset = shp->s_scnptr - (shp->s_vaddr - taddr); tsize = shp->s_size + (shp->s_vaddr - taddr); /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", taddr, tsize, offset)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, tsize, taddr, nd.ni_vp, offset, VM_PROT_READ|VM_PROT_EXECUTE); /* load data */ error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_DATA); if (error) { DPRINTF(("can't find shlib data section\n")); vrele(nd.ni_vp); return error; } /* DPRINTF(("COFF data addr %x size %d offset %d\n", shp->s_vaddr, shp->s_size, shp->s_scnptr)); */ daddr = COFF_ALIGN(shp->s_vaddr); offset = shp->s_scnptr - (shp->s_vaddr - daddr); dsize = shp->s_size + (shp->s_vaddr - daddr); /* epp->ep_dsize = dsize + ap->a_bsize; */ /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", daddr, dsize, offset)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, dsize, daddr, nd.ni_vp, offset, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* load bss */ error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_BSS); if (!error) { int baddr = round_page(daddr + dsize); int bsize = daddr + dsize + shp->s_size - baddr; if (bsize > 0) { /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", baddr, bsize, 0)); */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); } } vrele(nd.ni_vp); return 0; } int exec_ibcs2_xout_makecmds(p, epp) struct proc *p; struct exec_package *epp; { int error; struct xexec *xp = epp->ep_hdr; struct xext *xep; if (epp->ep_hdrvalid < XOUT_HDR_SIZE) return ENOEXEC; if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386)) return ENOEXEC; if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC)) return ENOEXEC; xep = epp->ep_hdr + sizeof(struct xexec); #ifdef notyet if (xp->x_renv & XE_PURE) error = exec_ibcs2_xout_prep_zmagic(p, epp, xp, xep); else #endif error = exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep); if (error == 0) epp->ep_emul = &emul_ibcs2; if (error) kill_vmcmds(&epp->ep_vmcmds); return error; } /* * exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package * */ int exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep) struct proc *p; struct exec_package *epp; struct xexec *xp; struct xext *xep; { int error, nseg, i; size_t resid; long baddr, bsize; struct xseg *xs; /* read in segment table */ xs = (struct xseg *)malloc(xep->xe_segsize, M_TEMP, M_WAITOK); error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t)xs, xep->xe_segsize, xep->xe_segpos, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p); if (error) { DPRINTF(("segment table read error %d\n", error)); free(xs, M_TEMP); return ENOEXEC; } for (nseg = xep->xe_segsize / sizeof(*xs), i = 0; i < nseg; i++) { switch (xs[i].xs_type) { case XS_TTEXT: /* text segment */ DPRINTF(("text addr %x psize %d vsize %d off %d\n", xs[i].xs_rbase, xs[i].xs_psize, xs[i].xs_vsize, xs[i].xs_filpos)); epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */ epp->ep_tsize = xs[i].xs_vsize; DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr, epp->ep_tsize, xs[i].xs_filpos)); NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize, epp->ep_taddr, epp->ep_vp, xs[i].xs_filpos, VM_PROT_READ|VM_PROT_EXECUTE); break; case XS_TDATA: /* data segment */ DPRINTF(("data addr %x psize %d vsize %d off %d\n", xs[i].xs_rbase, xs[i].xs_psize, xs[i].xs_vsize, xs[i].xs_filpos)); epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */ epp->ep_dsize = xs[i].xs_vsize; DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr, xs[i].xs_psize, xs[i].xs_filpos)); NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, xs[i].xs_psize, epp->ep_daddr, epp->ep_vp, xs[i].xs_filpos, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ baddr = round_page(epp->ep_daddr + xs[i].xs_psize); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) { DPRINTF(("VMCMD: bss addr %x size %d off %d\n", baddr, bsize, 0)); NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE| VM_PROT_EXECUTE); } break; default: break; } } /* set up entry point */ epp->ep_entry = xp->x_entry; DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n", epp->ep_taddr, epp->ep_tsize, epp->ep_daddr, epp->ep_dsize, epp->ep_entry)); free(xs, M_TEMP); return exec_ibcs2_xout_setup_stack(p, epp); } /* * exec_ibcs2_xout_setup_stack(): Set up the stack segment for a x.out * executable. * * Note that the ep_ssize parameter must be set to be the current stack * limit; this is adjusted in the body of execve() to yield the * appropriate stack segment usage once the argument length is * calculated. * * This function returns an int for uniformity with other (future) formats' * stack setup functions. They might have errors to return. */ int exec_ibcs2_xout_setup_stack(p, epp) struct proc *p; struct exec_package *epp; { epp->ep_maxsaddr = USRSTACK - MAXSSIZ; epp->ep_minsaddr = USRSTACK; epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur; /* * set up commands for stack. note that this takes *two*, one to * map the part of the stack which we can access, and one to map * the part which we can't. * * arguably, it could be made into one, but that would require the * addition of another mapping proc, which is unnecessary * * note that in memory, things assumed to be: 0 ....... ep_maxsaddr * ep_minsaddr */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr), epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE); NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize, (epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return 0; }