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-rw-r--r--sys/compat/ibcs2/ibcs2_exec.c728
1 files changed, 728 insertions, 0 deletions
diff --git a/sys/compat/ibcs2/ibcs2_exec.c b/sys/compat/ibcs2/ibcs2_exec.c
new file mode 100644
index 00000000000..1e69c9d6101
--- /dev/null
+++ b/sys/compat/ibcs2/ibcs2_exec.c
@@ -0,0 +1,728 @@
+/* $NetBSD: ibcs2_exec.c,v 1.10 1995/06/24 20:18:55 christos 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 <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+#include <sys/resourcevar.h>
+#include <sys/namei.h>
+#include <vm/vm.h>
+
+#include <compat/ibcs2/ibcs2_types.h>
+#include <compat/ibcs2/ibcs2_exec.h>
+#include <compat/ibcs2/ibcs2_util.h>
+#include <compat/ibcs2/ibcs2_syscall.h>
+
+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 *));
+
+extern int bsd2ibcs_errno[];
+extern struct sysent ibcs2_sysent[];
+extern char *ibcs2_syscallnames[];
+extern void ibcs2_sendsig __P((sig_t, int, int, u_long));
+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,
+ ibcs2_syscallnames,
+ 0,
+ copyargs,
+ setregs,
+ 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;
+{
+ u_long midmag, magic;
+ u_short mid;
+ 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);
+
+bad:
+ 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
+ * <stack> 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, resid, siz, error;
+
+ pos = COFF_HDR_SIZE;
+ for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
+ siz = sizeof(struct coff_scnhdr);
+ if (error = vn_rdwr(UIO_READ, vp, (caddr_t) sh,
+ siz, pos,
+ UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
+ &resid, p)) {
+ 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=%d got %d\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\n");
+#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) {
+ int 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, siz, resid;
+ int taddr, tsize, daddr, dsize, offset;
+ 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)) {
+ DPRINTF(("coff_load_shlib: can't find library %s\n", path));
+ return error;
+ }
+
+ siz = sizeof(struct coff_filehdr);
+ if (error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t) fhp, siz, 0,
+ UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
+ &resid, p)) {
+ 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=%d got %d\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;
+{
+ u_long midmag, magic;
+ u_short mid;
+ 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, resid, nseg, i;
+ 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
+ * <stack> 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-21 03:41:57 +0000