2 * Copyright (c) 1994 Sean Eric Fagan
3 * Copyright (c) 1994 Søren Schmidt
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software withough specific prior written permission
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * $FreeBSD: src/sys/i386/ibcs2/imgact_coff.c,v 1.40 1999/12/15 23:01:47 eivind Exp $
30 * $DragonFly: src/sys/emulation/ibcs2/coff/Attic/imgact_coff.c,v 1.5 2003/08/07 21:17:17 dillon Exp $
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/imgact.h>
37 #include <sys/kernel.h>
38 #include <sys/fcntl.h>
39 #include <sys/malloc.h>
40 #include <sys/mount.h>
42 #include <sys/namei.h>
43 #include <sys/vnode.h>
47 #include <vm/vm_map.h>
48 #include <vm/vm_kern.h>
49 #include <vm/vm_extern.h>
50 #include <vm/vm_zone.h>
52 #include "../i386/coff.h"
53 #include "../i386/ibcs2_util.h"
55 extern struct sysentvec ibcs2_svr3_sysvec;
57 static int coff_load_file __P((struct thread *td, char *name));
58 static int exec_coff_imgact __P((struct image_params *imgp));
60 static int load_coff_section __P((struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot));
63 load_coff_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset,
64 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)
67 vm_offset_t map_offset;
70 unsigned char *data_buf = 0;
73 map_offset = trunc_page(offset);
74 map_addr = trunc_page((vm_offset_t)vmaddr);
78 * We have the stupid situation that
79 * the section is longer than it is on file,
80 * which means it has zero-filled areas, and
81 * we have to work for it. Stupid iBCS!
83 map_len = trunc_page(offset + filsz) - trunc_page(map_offset);
86 * The only stuff we care about is on disk, and we
87 * don't care if we map in more than is really there.
89 map_len = round_page(offset + filsz) - trunc_page(map_offset);
92 DPRINTF(("%s(%d): vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, "
93 "VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n",
94 __FILE__, __LINE__, map_addr, map_len, prot, map_offset));
96 if ((error = vm_mmap(&vmspace->vm_map,
101 MAP_PRIVATE | MAP_FIXED,
106 if (memsz == filsz) {
112 * Now we have screwball stuff, to accomodate stupid COFF.
113 * We have to map the remaining bit of the file into the kernel's
114 * memory map, allocate some anonymous memory, copy that last
115 * bit into it, and then we're done. *sigh*
116 * For clean-up reasons, we actally map in the file last.
119 copy_len = (offset + filsz) - trunc_page(offset + filsz);
120 map_addr = trunc_page((vm_offset_t)vmaddr + filsz);
121 map_len = round_page((vm_offset_t)vmaddr + memsz) - map_addr;
123 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx,0x%x, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n", __FILE__, __LINE__, map_addr, map_len));
126 error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr,
127 map_len, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
132 if ((error = vm_mmap(kernel_map,
133 (vm_offset_t *) &data_buf,
139 trunc_page(offset + filsz))) != 0)
142 error = copyout(data_buf, (caddr_t) map_addr, copy_len);
144 if (vm_map_remove(kernel_map,
145 (vm_offset_t) data_buf,
146 (vm_offset_t) data_buf + PAGE_SIZE))
147 panic("load_coff_section vm_map_remove failed");
153 coff_load_file(struct thread *td, char *name)
155 struct vmspace *vmspace;
160 struct filehdr *fhdr;
161 struct aouthdr *ahdr;
165 unsigned long text_offset = 0, text_address = 0, text_size = 0;
166 unsigned long data_offset = 0, data_address = 0, data_size = 0;
167 unsigned long bss_size = 0;
171 KKASSERT(td->td_proc);
172 cred = td->td_proc->p_ucred;
173 vmspace = td->td_proc->p_vmspace;
175 /* XXX use of 'curthread' should be 'td'?*/
176 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME, UIO_SYSSPACE, name, curthread);
186 if (vp->v_writecount) {
191 if ((error = VOP_GETATTR(vp, &attr, td)) != 0)
194 if ((vp->v_mount->mnt_flag & MNT_NOEXEC)
195 || ((attr.va_mode & 0111) == 0)
196 || (attr.va_type != VREG))
199 if (attr.va_size == 0) {
204 if ((error = VOP_ACCESS(vp, VEXEC, cred, td)) != 0)
207 if ((error = VOP_OPEN(vp, FREAD, cred, td)) != 0)
211 * Lose the lock on the vnode. It's no longer needed, and must not
212 * exist for the pagefault paging to work below.
214 VOP_UNLOCK(vp, 0, td);
216 if ((error = vm_mmap(kernel_map,
217 (vm_offset_t *) &ptr,
226 fhdr = (struct filehdr *)ptr;
228 if (fhdr->f_magic != I386_COFF) {
230 goto dealloc_and_fail;
233 nscns = fhdr->f_nscns;
235 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
237 * XXX -- just fail. I'm so lazy.
240 goto dealloc_and_fail;
243 ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr));
245 scns = (struct scnhdr*)(ptr + sizeof(struct filehdr)
246 + sizeof(struct aouthdr));
248 for (i = 0; i < nscns; i++) {
249 if (scns[i].s_flags & STYP_NOLOAD)
251 else if (scns[i].s_flags & STYP_TEXT) {
252 text_address = scns[i].s_vaddr;
253 text_size = scns[i].s_size;
254 text_offset = scns[i].s_scnptr;
256 else if (scns[i].s_flags & STYP_DATA) {
257 data_address = scns[i].s_vaddr;
258 data_size = scns[i].s_size;
259 data_offset = scns[i].s_scnptr;
260 } else if (scns[i].s_flags & STYP_BSS) {
261 bss_size = scns[i].s_size;
265 if ((error = load_coff_section(vmspace, vp, text_offset,
266 (caddr_t)(void *)(uintptr_t)text_address,
267 text_size, text_size,
268 VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
269 goto dealloc_and_fail;
271 if ((error = load_coff_section(vmspace, vp, data_offset,
272 (caddr_t)(void *)(uintptr_t)data_address,
273 data_size + bss_size, data_size,
274 VM_PROT_ALL)) != 0) {
275 goto dealloc_and_fail;
281 if (vm_map_remove(kernel_map,
283 (vm_offset_t) ptr + PAGE_SIZE))
284 panic(__FUNCTION__ " vm_map_remove failed");
287 VOP_UNLOCK(vp, 0, td);
289 NDFREE(&nd, NDF_ONLY_PNBUF);
295 exec_coff_imgact(imgp)
296 struct image_params *imgp;
298 const struct filehdr *fhdr = (const struct filehdr*)imgp->image_header;
299 const struct aouthdr *ahdr;
300 const struct scnhdr *scns;
302 struct vmspace *vmspace;
305 unsigned long text_offset = 0, text_address = 0, text_size = 0;
306 unsigned long data_offset = 0, data_address = 0, data_size = 0;
307 unsigned long bss_size = 0;
310 if (fhdr->f_magic != I386_COFF ||
311 !(fhdr->f_flags & F_EXEC)) {
313 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
317 nscns = fhdr->f_nscns;
318 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
320 * For now, return an error -- need to be able to
321 * read in all of the section structures.
324 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
328 ahdr = (const struct aouthdr*)
329 ((const char*)(imgp->image_header) + sizeof(struct filehdr));
330 imgp->entry_addr = ahdr->entry;
332 scns = (const struct scnhdr*)
333 ((const char*)(imgp->image_header) + sizeof(struct filehdr) +
334 sizeof(struct aouthdr));
336 if ((error = exec_extract_strings(imgp)) != 0) {
337 DPRINTF(("%s(%d): return %d\n", __FILE__, __LINE__, error));
341 exec_new_vmspace(imgp);
342 vmspace = imgp->proc->p_vmspace;
344 for (i = 0; i < nscns; i++) {
346 DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, "
347 "scns[i].s_scnptr = %d\n", i, scns[i].s_name,
348 scns[i].s_vaddr, scns[i].s_scnptr));
349 if (scns[i].s_flags & STYP_NOLOAD) {
351 * A section that is not loaded, for whatever
352 * reason. It takes precedance over other flag
356 } else if (scns[i].s_flags & STYP_TEXT) {
357 text_address = scns[i].s_vaddr;
358 text_size = scns[i].s_size;
359 text_offset = scns[i].s_scnptr;
360 } else if (scns[i].s_flags & STYP_DATA) {
362 data_address = scns[i].s_vaddr;
363 data_size = scns[i].s_size;
364 data_offset = scns[i].s_scnptr;
365 } else if (scns[i].s_flags & STYP_BSS) {
367 bss_size = scns[i].s_size;
368 } else if (scns[i].s_flags & STYP_LIB) {
370 int foff = trunc_page(scns[i].s_scnptr);
371 int off = scns[i].s_scnptr - foff;
372 int len = round_page(scns[i].s_size + PAGE_SIZE);
375 if ((error = vm_mmap(kernel_map,
376 (vm_offset_t *) &buf,
387 int emul_path_len = strlen(ibcs2_emul_path);
389 libbuf = malloc(MAXPATHLEN + emul_path_len,
391 strcpy(libbuf, ibcs2_emul_path);
393 for (j = off; j < scns[i].s_size + off; j++) {
396 libname = buf + j + 4 * *(long*)(buf + j + 4);
397 j += 4* *(long*)(buf + j);
399 DPRINTF(("%s(%d): shared library %s\n",
400 __FILE__, __LINE__, libname));
401 strcpy(&libbuf[emul_path_len], libname);
402 error = coff_load_file(imgp->proc->p_thread, libbuf);
404 error = coff_load_file(
405 imgp->proc->p_thread,
410 free(libbuf, M_TEMP);
412 if (vm_map_remove(kernel_map,
414 (vm_offset_t) buf + len))
415 panic("exec_coff_imgact vm_map_remove failed");
424 DPRINTF(("%s(%d): load_coff_section(vmspace, "
425 "imgp->vp, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n",
426 __FILE__, __LINE__, text_offset, text_address,
427 text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE));
428 if ((error = load_coff_section(vmspace, imgp->vp,
430 (caddr_t)(void *)(uintptr_t)text_address,
431 text_size, text_size,
432 VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
433 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
437 * Map in .data and .bss now
441 DPRINTF(("%s(%d): load_coff_section(vmspace, "
442 "imgp->vp, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n",
443 __FILE__, __LINE__, data_offset, data_address,
444 data_size + bss_size, data_size, VM_PROT_ALL));
445 if ((error = load_coff_section(vmspace, imgp->vp,
447 (caddr_t)(void *)(uintptr_t)data_address,
448 data_size + bss_size, data_size,
449 VM_PROT_ALL)) != 0) {
451 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
455 imgp->interpreted = 0;
456 imgp->proc->p_sysent = &ibcs2_svr3_sysvec;
458 vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT;
459 vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT;
460 vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)text_address;
461 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t)data_address;
463 hole = (caddr_t)trunc_page((vm_offset_t)vmspace->vm_daddr) + ctob(vmspace->vm_dsize);
466 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n",
467 __FILE__, __LINE__, hole));
468 DPRINTF(("imgact: error = %d\n", error));
470 error = vm_map_find(&vmspace->vm_map, NULL, 0,
471 (vm_offset_t *) &hole, PAGE_SIZE, FALSE,
472 VM_PROT_ALL, VM_PROT_ALL, 0);
474 DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n",
475 ctob(vmspace->vm_dsize), vmspace->vm_daddr,
476 ctob(vmspace->vm_dsize) + vmspace->vm_daddr ));
477 DPRINTF(("%s(%d): returning successfully!\n", __FILE__, __LINE__));
479 /* Indicate that this file should not be modified */
480 imgp->vp->v_flag |= VTEXT;
485 * Tell kern_execve.c about it, with a little help from the linker.
487 static struct execsw coff_execsw = { exec_coff_imgact, "coff" };
488 EXEC_SET(coff, coff_execsw);