Annotation of sys/compat/ibcs2/ibcs2_exec.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ibcs2_exec.c,v 1.18 2006/12/29 13:04:37 pedro Exp $ */
2: /* $NetBSD: ibcs2_exec.c,v 1.12 1996/10/12 02:13:52 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 1994, 1995 Scott Bartram
6: * Copyright (c) 1994 Adam Glass
7: * Copyright (c) 1993, 1994 Christopher G. Demetriou
8: * All rights reserved.
9: *
10: * originally from kern/exec_ecoff.c
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by Scott Bartram.
23: * 4. The name of the author may not be used to endorse or promote products
24: * derived from this software without specific prior written permission
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36: */
37:
38: #include <sys/param.h>
39: #include <sys/systm.h>
40: #include <sys/proc.h>
41: #include <sys/exec.h>
42: #include <sys/malloc.h>
43: #include <sys/vnode.h>
44: #include <sys/resourcevar.h>
45: #include <sys/namei.h>
46: #include <uvm/uvm_extern.h>
47:
48: #include <compat/ibcs2/ibcs2_types.h>
49: #include <compat/ibcs2/ibcs2_exec.h>
50: #include <compat/ibcs2/ibcs2_util.h>
51: #include <compat/ibcs2/ibcs2_syscall.h>
52:
53: int exec_ibcs2_coff_prep_omagic(struct proc *, struct exec_package *,
54: struct coff_filehdr *,
55: struct coff_aouthdr *);
56: int exec_ibcs2_coff_prep_nmagic(struct proc *, struct exec_package *,
57: struct coff_filehdr *,
58: struct coff_aouthdr *);
59: int exec_ibcs2_coff_prep_zmagic(struct proc *, struct exec_package *,
60: struct coff_filehdr *,
61: struct coff_aouthdr *);
62: int exec_ibcs2_coff_setup_stack(struct proc *, struct exec_package *);
63: void cpu_exec_ibcs2_coff_setup(int, struct proc *, struct exec_package *,
64: void *);
65:
66: int exec_ibcs2_xout_prep_nmagic(struct proc *, struct exec_package *,
67: struct xexec *, struct xext *);
68: int exec_ibcs2_xout_prep_zmagic(struct proc *, struct exec_package *,
69: struct xexec *, struct xext *);
70: int exec_ibcs2_xout_setup_stack(struct proc *, struct exec_package *);
71: int coff_load_shlib(struct proc *, char *, struct exec_package *);
72: static int coff_find_section(struct proc *, struct vnode *,
73: struct coff_filehdr *, struct coff_scnhdr *,
74: int);
75:
76:
77: extern int bsd2ibcs_errno[];
78: extern struct sysent ibcs2_sysent[];
79: #ifdef SYSCALL_DEBUG
80: extern char *ibcs2_syscallnames[];
81: #endif
82: extern void ibcs2_sendsig(sig_t, int, int, u_long, int, union sigval);
83: extern char sigcode[], esigcode[];
84:
85: const char ibcs2_emul_path[] = "/emul/ibcs2";
86:
87: struct emul emul_ibcs2 = {
88: "ibcs2",
89: bsd2ibcs_errno,
90: ibcs2_sendsig,
91: 0,
92: IBCS2_SYS_MAXSYSCALL,
93: ibcs2_sysent,
94: #ifdef SYSCALL_DEBUG
95: ibcs2_syscallnames,
96: #else
97: NULL,
98: #endif
99: 0,
100: copyargs,
101: setregs,
102: NULL,
103: sigcode,
104: esigcode,
105: };
106:
107: /*
108: * exec_ibcs2_coff_makecmds(): Check if it's an coff-format executable.
109: *
110: * Given a proc pointer and an exec package pointer, see if the referent
111: * of the epp is in coff format. Check 'standard' magic numbers for
112: * this architecture. If that fails, return failure.
113: *
114: * This function is responsible for creating a set of vmcmds which can be
115: * used to build the process's vm space and inserting them into the exec
116: * package.
117: */
118:
119: int
120: exec_ibcs2_coff_makecmds(p, epp)
121: struct proc *p;
122: struct exec_package *epp;
123: {
124: int error;
125: struct coff_filehdr *fp = epp->ep_hdr;
126: struct coff_aouthdr *ap;
127:
128: if (epp->ep_hdrvalid < COFF_HDR_SIZE)
129: return ENOEXEC;
130:
131: if (COFF_BADMAG(fp))
132: return ENOEXEC;
133:
134: ap = (struct coff_aouthdr *)((char *)epp->ep_hdr +
135: sizeof(struct coff_filehdr));
136: switch (ap->a_magic) {
137: case COFF_OMAGIC:
138: error = exec_ibcs2_coff_prep_omagic(p, epp, fp, ap);
139: break;
140: case COFF_NMAGIC:
141: error = exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap);
142: break;
143: case COFF_ZMAGIC:
144: error = exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap);
145: break;
146: default:
147: return ENOEXEC;
148: }
149:
150: if (error == 0)
151: epp->ep_emul = &emul_ibcs2;
152:
153: if (error)
154: kill_vmcmds(&epp->ep_vmcmds);
155:
156: return error;
157: }
158:
159: /*
160: * exec_ibcs2_coff_setup_stack(): Set up the stack segment for a coff
161: * executable.
162: *
163: * Note that the ep_ssize parameter must be set to be the current stack
164: * limit; this is adjusted in the body of execve() to yield the
165: * appropriate stack segment usage once the argument length is
166: * calculated.
167: *
168: * This function returns an int for uniformity with other (future) formats'
169: * stack setup functions. They might have errors to return.
170: */
171:
172: int
173: exec_ibcs2_coff_setup_stack(p, epp)
174: struct proc *p;
175: struct exec_package *epp;
176: {
177: /* DPRINTF(("enter exec_ibcs2_coff_setup_stack\n")); */
178:
179: epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
180: epp->ep_minsaddr = USRSTACK;
181: epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
182:
183: /*
184: * set up commands for stack. note that this takes *two*, one to
185: * map the part of the stack which we can access, and one to map
186: * the part which we can't.
187: *
188: * arguably, it could be made into one, but that would require the
189: * addition of another mapping proc, which is unnecessary
190: *
191: * note that in memory, things assumed to be: 0 ....... ep_maxsaddr
192: * <stack> ep_minsaddr
193: */
194: /* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_maxsaddr,
195: (epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr)); */
196: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
197: ((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
198: epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
199: /* DPRINTF(("VMCMD: addr %x size %d\n",
200: epp->ep_minsaddr - epp->ep_ssize,
201: epp->ep_ssize)); */
202: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
203: (epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
204: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
205:
206: return 0;
207: }
208:
209:
210: /*
211: * exec_ibcs2_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package
212: */
213:
214: int
215: exec_ibcs2_coff_prep_omagic(p, epp, fp, ap)
216: struct proc *p;
217: struct exec_package *epp;
218: struct coff_filehdr *fp;
219: struct coff_aouthdr *ap;
220: {
221: epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart);
222: epp->ep_tsize = ap->a_tsize;
223: epp->ep_daddr = COFF_SEGMENT_ALIGN(ap, ap->a_dstart);
224: epp->ep_dsize = ap->a_dsize;
225: epp->ep_entry = ap->a_entry;
226:
227: /* set up command for text and data segments */
228: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
229: ap->a_tsize + ap->a_dsize, epp->ep_taddr, epp->ep_vp,
230: COFF_TXTOFF(fp, ap),
231: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
232:
233: /* set up command for bss segment */
234: if (ap->a_bsize > 0)
235: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
236: COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize),
237: NULLVP, 0,
238: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
239:
240: return exec_ibcs2_coff_setup_stack(p, epp);
241: }
242:
243: /*
244: * exec_ibcs2_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec
245: * package.
246: */
247:
248: int
249: exec_ibcs2_coff_prep_nmagic(p, epp, fp, ap)
250: struct proc *p;
251: struct exec_package *epp;
252: struct coff_filehdr *fp;
253: struct coff_aouthdr *ap;
254: {
255: epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart);
256: epp->ep_tsize = ap->a_tsize;
257: epp->ep_daddr = COFF_ROUND(ap->a_dstart, COFF_LDPGSZ);
258: epp->ep_dsize = ap->a_dsize;
259: epp->ep_entry = ap->a_entry;
260:
261: /* set up command for text segment */
262: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
263: epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap),
264: VM_PROT_READ|VM_PROT_EXECUTE);
265:
266: /* set up command for data segment */
267: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_dsize,
268: epp->ep_daddr, epp->ep_vp, COFF_DATOFF(fp, ap),
269: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
270:
271: /* set up command for bss segment */
272: if (ap->a_bsize > 0)
273: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
274: COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize),
275: NULLVP, 0,
276: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
277:
278: return exec_ibcs2_coff_setup_stack(p, epp);
279: }
280:
281: /*
282: * coff_find_section - load specified section header
283: *
284: * TODO - optimize by reading all section headers in at once
285: */
286:
287: static int
288: coff_find_section(p, vp, fp, sh, s_type)
289: struct proc *p;
290: struct vnode *vp;
291: struct coff_filehdr *fp;
292: struct coff_scnhdr *sh;
293: int s_type;
294: {
295: int i, pos, error;
296: size_t siz, resid;
297:
298: pos = COFF_HDR_SIZE;
299: for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
300: siz = sizeof(struct coff_scnhdr);
301: error = vn_rdwr(UIO_READ, vp, (caddr_t) sh,
302: siz, pos, UIO_SYSSPACE, 0, p->p_ucred,
303: &resid, p);
304: if (error) {
305: DPRINTF(("section hdr %d read error %d\n", i, error));
306: return error;
307: }
308: siz -= resid;
309: if (siz != sizeof(struct coff_scnhdr)) {
310: DPRINTF(("incomplete read: hdr %d ask=%d, rem=%u got %u\n",
311: s_type, sizeof(struct coff_scnhdr),
312: resid, siz));
313: return ENOEXEC;
314: }
315: /* DPRINTF(("found section: %x\n", sh->s_flags)); */
316: if (sh->s_flags == s_type)
317: return 0;
318: }
319: return ENOEXEC;
320: }
321:
322: /*
323: * exec_ibcs2_coff_prep_zmagic(): Prepare a COFF ZMAGIC binary's exec package
324: *
325: * First, set the various offsets/lengths in the exec package.
326: *
327: * Then, mark the text image busy (so it can be demand paged) or error
328: * out if this is not possible. Finally, set up vmcmds for the
329: * text, data, bss, and stack segments.
330: */
331:
332: int
333: exec_ibcs2_coff_prep_zmagic(p, epp, fp, ap)
334: struct proc *p;
335: struct exec_package *epp;
336: struct coff_filehdr *fp;
337: struct coff_aouthdr *ap;
338: {
339: int error;
340: u_long offset;
341: long dsize, baddr, bsize;
342: struct coff_scnhdr sh;
343:
344: /* DPRINTF(("enter exec_ibcs2_coff_prep_zmagic\n")); */
345:
346: /* set up command for text segment */
347: error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_TEXT);
348: if (error) {
349: DPRINTF(("can't find text section: %d\n", error));
350: return error;
351: }
352: /* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
353: sh.s_size, sh.s_scnptr)); */
354: epp->ep_taddr = COFF_ALIGN(sh.s_vaddr);
355: offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_taddr);
356: epp->ep_tsize = sh.s_size + (sh.s_vaddr - epp->ep_taddr);
357:
358: #ifdef notyet
359: /*
360: * check if vnode is in open for writing, because we want to
361: * demand-page out of it. if it is, don't do it, for various
362: * reasons
363: n */
364: if ((ap->a_tsize != 0 || ap->a_dsize != 0) &&
365: epp->ep_vp->v_writecount != 0) {
366: #ifdef DIAGNOSTIC
367: if (epp->ep_vp->v_flag & VTEXT)
368: panic("exec: a VTEXT vnode has writecount != 0");
369: #endif
370: return ETXTBSY;
371: }
372: vn_marktext(epp->ep_vp);
373: #endif
374:
375: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr,
376: epp->ep_tsize, offset)); */
377: #ifdef notyet
378: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, epp->ep_tsize,
379: epp->ep_taddr, epp->ep_vp, offset,
380: VM_PROT_READ|VM_PROT_EXECUTE);
381: #else
382: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
383: epp->ep_taddr, epp->ep_vp, offset,
384: VM_PROT_READ|VM_PROT_EXECUTE);
385: #endif
386:
387: /* set up command for data segment */
388: error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_DATA);
389: if (error) {
390: DPRINTF(("can't find data section: %d\n", error));
391: return error;
392: }
393: /* DPRINTF(("COFF data addr %x size %d offset %d\n", sh.s_vaddr,
394: sh.s_size, sh.s_scnptr)); */
395: epp->ep_daddr = COFF_ALIGN(sh.s_vaddr);
396: offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_daddr);
397: dsize = sh.s_size + (sh.s_vaddr - epp->ep_daddr);
398: epp->ep_dsize = dsize + ap->a_bsize;
399:
400: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr,
401: dsize, offset)); */
402: #ifdef notyet
403: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, dsize,
404: epp->ep_daddr, epp->ep_vp, offset,
405: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
406: #else
407: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
408: dsize, epp->ep_daddr, epp->ep_vp, offset,
409: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
410: #endif
411:
412: /* set up command for bss segment */
413: baddr = round_page(epp->ep_daddr + dsize);
414: bsize = epp->ep_daddr + epp->ep_dsize - baddr;
415: if (bsize > 0) {
416: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n",
417: baddr, bsize, 0)); */
418: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
419: bsize, baddr, NULLVP, 0,
420: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
421: }
422:
423: /* load any shared libraries */
424: error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB);
425: if (!error) {
426: size_t resid;
427: struct coff_slhdr *slhdr;
428: char buf[128], *bufp; /* FIXME */
429: unsigned int len = sh.s_size, entry_len;
430:
431: /* DPRINTF(("COFF shlib size %d offset %d\n",
432: sh.s_size, sh.s_scnptr)); */
433:
434: if (len > sizeof(buf))
435: return (ENOEXEC);
436:
437: error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t) buf,
438: len, sh.s_scnptr,
439: UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
440: &resid, p);
441: if (error) {
442: DPRINTF(("shlib section read error %d\n", error));
443: return ENOEXEC;
444: }
445: bufp = buf;
446: while (len) {
447: slhdr = (struct coff_slhdr *)bufp;
448: #ifdef notyet
449: path_index = slhdr->path_index * sizeof(long);
450: #endif
451: entry_len = slhdr->entry_len * sizeof(long);
452:
453: /* DPRINTF(("path_index: %d entry_len: %d name: %s\n",
454: path_index, entry_len, slhdr->sl_name)); */
455:
456: if (entry_len > len)
457: return (ENOEXEC);
458:
459: error = coff_load_shlib(p, slhdr->sl_name, epp);
460: if (error)
461: return ENOEXEC;
462: bufp += entry_len;
463: len -= entry_len;
464: }
465: }
466:
467: /* set up entry point */
468: epp->ep_entry = ap->a_entry;
469:
470: #if 0
471: DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n",
472: epp->ep_taddr, epp->ep_tsize,
473: epp->ep_daddr, epp->ep_dsize,
474: epp->ep_entry));
475: #endif
476:
477: return exec_ibcs2_coff_setup_stack(p, epp);
478: }
479:
480: int
481: coff_load_shlib(p, path, epp)
482: struct proc *p;
483: char *path;
484: struct exec_package *epp;
485: {
486: int error, taddr, tsize, daddr, dsize, offset;
487: size_t siz, resid;
488: struct nameidata nd;
489: struct coff_filehdr fh, *fhp = &fh;
490: struct coff_scnhdr sh, *shp = &sh;
491: caddr_t sg = stackgap_init(p->p_emul);
492:
493: /*
494: * 1. open shlib file
495: * 2. read filehdr
496: * 3. map text, data, and bss out of it using VM_*
497: */
498: IBCS2_CHECK_ALT_EXIST(p, &sg, path);
499: NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p);
500: /* first get the vnode */
501: if ((error = namei(&nd)) != 0) {
502: DPRINTF(("coff_load_shlib: can't find library %s\n", path));
503: return error;
504: }
505:
506: siz = sizeof(struct coff_filehdr);
507: error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t) fhp, siz, 0,
508: UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid, p);
509: if (error) {
510: DPRINTF(("filehdr read error %d\n", error));
511: vrele(nd.ni_vp);
512: return error;
513: }
514: siz -= resid;
515: if (siz != sizeof(struct coff_filehdr)) {
516: DPRINTF(("coff_load_shlib: incomplete read: ask=%d, rem=%u got %u\n",
517: sizeof(struct coff_filehdr), resid, siz));
518: vrele(nd.ni_vp);
519: return ENOEXEC;
520: }
521:
522: /* load text */
523: error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_TEXT);
524: if (error) {
525: DPRINTF(("can't find shlib text section\n"));
526: vrele(nd.ni_vp);
527: return error;
528: }
529: /* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
530: sh.s_size, sh.s_scnptr)); */
531: taddr = COFF_ALIGN(shp->s_vaddr);
532: offset = shp->s_scnptr - (shp->s_vaddr - taddr);
533: tsize = shp->s_size + (shp->s_vaddr - taddr);
534: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", taddr, tsize, offset)); */
535: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, tsize, taddr,
536: nd.ni_vp, offset,
537: VM_PROT_READ|VM_PROT_EXECUTE);
538:
539: /* load data */
540: error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_DATA);
541: if (error) {
542: DPRINTF(("can't find shlib data section\n"));
543: vrele(nd.ni_vp);
544: return error;
545: }
546: /* DPRINTF(("COFF data addr %x size %d offset %d\n", shp->s_vaddr,
547: shp->s_size, shp->s_scnptr)); */
548: daddr = COFF_ALIGN(shp->s_vaddr);
549: offset = shp->s_scnptr - (shp->s_vaddr - daddr);
550: dsize = shp->s_size + (shp->s_vaddr - daddr);
551: /* epp->ep_dsize = dsize + ap->a_bsize; */
552:
553: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n", daddr, dsize, offset)); */
554: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
555: dsize, daddr, nd.ni_vp, offset,
556: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
557:
558: /* load bss */
559: error = coff_find_section(p, nd.ni_vp, fhp, shp, COFF_STYP_BSS);
560: if (!error) {
561: int baddr = round_page(daddr + dsize);
562: int bsize = daddr + dsize + shp->s_size - baddr;
563: if (bsize > 0) {
564: /* DPRINTF(("VMCMD: addr %x size %d offset %d\n",
565: baddr, bsize, 0)); */
566: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
567: bsize, baddr, NULLVP, 0,
568: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
569: }
570: }
571: vrele(nd.ni_vp);
572:
573: return 0;
574: }
575:
576: int
577: exec_ibcs2_xout_makecmds(p, epp)
578: struct proc *p;
579: struct exec_package *epp;
580: {
581: int error;
582: struct xexec *xp = epp->ep_hdr;
583: struct xext *xep;
584:
585: if (epp->ep_hdrvalid < XOUT_HDR_SIZE)
586: return ENOEXEC;
587:
588: if ((xp->x_magic != XOUT_MAGIC) || (xp->x_cpu != XC_386))
589: return ENOEXEC;
590: if ((xp->x_renv & (XE_ABS | XE_VMOD)) || !(xp->x_renv & XE_EXEC))
591: return ENOEXEC;
592:
593: xep = (struct xext *)((char *)epp->ep_hdr + sizeof(struct xexec));
594: #ifdef notyet
595: if (xp->x_renv & XE_PURE)
596: error = exec_ibcs2_xout_prep_zmagic(p, epp, xp, xep);
597: else
598: #endif
599: error = exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep);
600:
601: if (error == 0)
602: epp->ep_emul = &emul_ibcs2;
603:
604: if (error)
605: kill_vmcmds(&epp->ep_vmcmds);
606:
607: return error;
608: }
609:
610: /*
611: * exec_ibcs2_xout_prep_nmagic(): Prepare a pure x.out binary's exec package
612: *
613: */
614:
615: int
616: exec_ibcs2_xout_prep_nmagic(p, epp, xp, xep)
617: struct proc *p;
618: struct exec_package *epp;
619: struct xexec *xp;
620: struct xext *xep;
621: {
622: int error, nseg, i;
623: size_t resid;
624: long baddr, bsize;
625: struct xseg *xs;
626:
627: /* read in segment table */
628: if (xep->xe_segsize > 16 * sizeof(*xs))
629: return (ENOEXEC);
630: xs = (struct xseg *)malloc(xep->xe_segsize, M_TEMP, M_WAITOK);
631: error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t)xs,
632: xep->xe_segsize, xep->xe_segpos,
633: UIO_SYSSPACE, 0, p->p_ucred,
634: &resid, p);
635: if (error) {
636: DPRINTF(("segment table read error %d\n", error));
637: free(xs, M_TEMP);
638: return ENOEXEC;
639: }
640:
641: for (nseg = xep->xe_segsize / sizeof(*xs), i = 0; i < nseg; i++) {
642: switch (xs[i].xs_type) {
643: case XS_TTEXT: /* text segment */
644:
645: DPRINTF(("text addr %x psize %d vsize %d off %d\n",
646: xs[i].xs_rbase, xs[i].xs_psize,
647: xs[i].xs_vsize, xs[i].xs_filpos));
648:
649: epp->ep_taddr = xs[i].xs_rbase; /* XXX - align ??? */
650: epp->ep_tsize = xs[i].xs_vsize;
651:
652: DPRINTF(("VMCMD: addr %x size %d offset %d\n",
653: epp->ep_taddr, epp->ep_tsize,
654: xs[i].xs_filpos));
655: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
656: epp->ep_tsize, epp->ep_taddr,
657: epp->ep_vp, xs[i].xs_filpos,
658: VM_PROT_READ|VM_PROT_EXECUTE);
659: break;
660:
661: case XS_TDATA: /* data segment */
662:
663: DPRINTF(("data addr %x psize %d vsize %d off %d\n",
664: xs[i].xs_rbase, xs[i].xs_psize,
665: xs[i].xs_vsize, xs[i].xs_filpos));
666:
667: epp->ep_daddr = xs[i].xs_rbase; /* XXX - align ??? */
668: epp->ep_dsize = xs[i].xs_vsize;
669:
670: DPRINTF(("VMCMD: addr %x size %d offset %d\n",
671: epp->ep_daddr, xs[i].xs_psize,
672: xs[i].xs_filpos));
673: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
674: xs[i].xs_psize, epp->ep_daddr,
675: epp->ep_vp, xs[i].xs_filpos,
676: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
677:
678: /* set up command for bss segment */
679: baddr = round_page(epp->ep_daddr + xs[i].xs_psize);
680: bsize = epp->ep_daddr + epp->ep_dsize - baddr;
681: if (bsize > 0) {
682: DPRINTF(("VMCMD: bss addr %x size %d off %d\n",
683: baddr, bsize, 0));
684: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
685: bsize, baddr, NULLVP, 0,
686: VM_PROT_READ|VM_PROT_WRITE|
687: VM_PROT_EXECUTE);
688: }
689: break;
690:
691: default:
692: break;
693: }
694: }
695:
696: /* set up entry point */
697: epp->ep_entry = xp->x_entry;
698:
699: DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n",
700: epp->ep_taddr, epp->ep_tsize,
701: epp->ep_daddr, epp->ep_dsize,
702: epp->ep_entry));
703:
704: free(xs, M_TEMP);
705: return exec_ibcs2_xout_setup_stack(p, epp);
706: }
707:
708: /*
709: * exec_ibcs2_xout_setup_stack(): Set up the stack segment for a x.out
710: * executable.
711: *
712: * Note that the ep_ssize parameter must be set to be the current stack
713: * limit; this is adjusted in the body of execve() to yield the
714: * appropriate stack segment usage once the argument length is
715: * calculated.
716: *
717: * This function returns an int for uniformity with other (future) formats'
718: * stack setup functions. They might have errors to return.
719: */
720:
721: int
722: exec_ibcs2_xout_setup_stack(p, epp)
723: struct proc *p;
724: struct exec_package *epp;
725: {
726: epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
727: epp->ep_minsaddr = USRSTACK;
728: epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
729:
730: /*
731: * set up commands for stack. note that this takes *two*, one to
732: * map the part of the stack which we can access, and one to map
733: * the part which we can't.
734: *
735: * arguably, it could be made into one, but that would require the
736: * addition of another mapping proc, which is unnecessary
737: *
738: * note that in memory, things assumed to be: 0 ....... ep_maxsaddr
739: * <stack> ep_minsaddr
740: */
741: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
742: ((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
743: epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
744: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
745: (epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
746: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
747:
748: return 0;
749: }
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