2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * irixelf.c: Code to load IRIX ELF executables conforming to the MIPS ABI.
7 * Based off of work by Eric Youngdale.
9 * Copyright (C) 1993 - 1994 Eric Youngdale <ericy@cais.com>
10 * Copyright (C) 1996 - 2004 David S. Miller <dm@engr.sgi.com>
11 * Copyright (C) 2004 - 2005 Steven J. Hill <sjhill@realitydiluted.com>
13 #include <linux/module.h>
15 #include <linux/stat.h>
16 #include <linux/sched.h>
18 #include <linux/mman.h>
19 #include <linux/a.out.h>
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/signal.h>
23 #include <linux/binfmts.h>
24 #include <linux/string.h>
25 #include <linux/file.h>
26 #include <linux/fcntl.h>
27 #include <linux/ptrace.h>
28 #include <linux/slab.h>
29 #include <linux/shm.h>
30 #include <linux/personality.h>
31 #include <linux/elfcore.h>
32 #include <linux/smp_lock.h>
34 #include <asm/mipsregs.h>
35 #include <asm/namei.h>
36 #include <asm/prctl.h>
37 #include <asm/uaccess.h>
39 #define DLINFO_ITEMS 12
41 #include <linux/elf.h>
45 static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs);
46 static int load_irix_library(struct file *);
47 static int irix_core_dump(long signr, struct pt_regs * regs,
50 static struct linux_binfmt irix_format = {
51 NULL, THIS_MODULE, load_irix_binary, load_irix_library,
52 irix_core_dump, PAGE_SIZE
56 /* Debugging routines. */
57 static char *get_elf_p_type(Elf32_Word p_type)
62 case PT_NULL: return("PT_NULL"); break;
63 case PT_LOAD: return("PT_LOAD"); break;
64 case PT_DYNAMIC: return("PT_DYNAMIC"); break;
65 case PT_INTERP: return("PT_INTERP"); break;
66 case PT_NOTE: return("PT_NOTE"); break;
67 case PT_SHLIB: return("PT_SHLIB"); break;
68 case PT_PHDR: return("PT_PHDR"); break;
69 case PT_LOPROC: return("PT_LOPROC/REGINFO"); break;
70 case PT_HIPROC: return("PT_HIPROC"); break;
71 default: return("PT_BOGUS"); break;
75 static void print_elfhdr(struct elfhdr *ehp)
79 printk("ELFHDR: e_ident<");
80 for(i = 0; i < (EI_NIDENT - 1); i++) printk("%x ", ehp->e_ident[i]);
81 printk("%x>\n", ehp->e_ident[i]);
82 printk(" e_type[%04x] e_machine[%04x] e_version[%08lx]\n",
83 (unsigned short) ehp->e_type, (unsigned short) ehp->e_machine,
84 (unsigned long) ehp->e_version);
85 printk(" e_entry[%08lx] e_phoff[%08lx] e_shoff[%08lx] "
87 (unsigned long) ehp->e_entry, (unsigned long) ehp->e_phoff,
88 (unsigned long) ehp->e_shoff, (unsigned long) ehp->e_flags);
89 printk(" e_ehsize[%04x] e_phentsize[%04x] e_phnum[%04x]\n",
90 (unsigned short) ehp->e_ehsize, (unsigned short) ehp->e_phentsize,
91 (unsigned short) ehp->e_phnum);
92 printk(" e_shentsize[%04x] e_shnum[%04x] e_shstrndx[%04x]\n",
93 (unsigned short) ehp->e_shentsize, (unsigned short) ehp->e_shnum,
94 (unsigned short) ehp->e_shstrndx);
97 static void print_phdr(int i, struct elf_phdr *ep)
99 printk("PHDR[%d]: p_type[%s] p_offset[%08lx] p_vaddr[%08lx] "
100 "p_paddr[%08lx]\n", i, get_elf_p_type(ep->p_type),
101 (unsigned long) ep->p_offset, (unsigned long) ep->p_vaddr,
102 (unsigned long) ep->p_paddr);
103 printk(" p_filesz[%08lx] p_memsz[%08lx] p_flags[%08lx] "
104 "p_align[%08lx]\n", (unsigned long) ep->p_filesz,
105 (unsigned long) ep->p_memsz, (unsigned long) ep->p_flags,
106 (unsigned long) ep->p_align);
109 static void dump_phdrs(struct elf_phdr *ep, int pnum)
113 for(i = 0; i < pnum; i++, ep++) {
114 if((ep->p_type == PT_LOAD) ||
115 (ep->p_type == PT_INTERP) ||
116 (ep->p_type == PT_PHDR))
122 static void set_brk(unsigned long start, unsigned long end)
124 start = PAGE_ALIGN(start);
125 end = PAGE_ALIGN(end);
128 down_write(¤t->mm->mmap_sem);
129 do_brk(start, end - start);
130 up_write(¤t->mm->mmap_sem);
134 /* We need to explicitly zero any fractional pages
135 * after the data section (i.e. bss). This would
136 * contain the junk from the file that should not
139 static void padzero(unsigned long elf_bss)
143 nbyte = elf_bss & (PAGE_SIZE-1);
145 nbyte = PAGE_SIZE - nbyte;
146 clear_user((void __user *) elf_bss, nbyte);
150 static unsigned long * create_irix_tables(char * p, int argc, int envc,
151 struct elfhdr * exec, unsigned int load_addr,
152 unsigned int interp_load_addr, struct pt_regs *regs,
153 struct elf_phdr *ephdr)
157 elf_addr_t *sp, *csp;
160 printk("create_irix_tables: p[%p] argc[%d] envc[%d] "
161 "load_addr[%08x] interp_load_addr[%08x]\n",
162 p, argc, envc, load_addr, interp_load_addr);
164 sp = (elf_addr_t *) (~15UL & (unsigned long) p);
166 csp -= exec ? DLINFO_ITEMS*2 : 2;
169 csp -= 1; /* argc itself */
170 if ((unsigned long)csp & 15UL) {
171 sp -= (16UL - ((unsigned long)csp & 15UL)) / sizeof(*sp);
175 * Put the ELF interpreter info on the stack
177 #define NEW_AUX_ENT(nr, id, val) \
178 __put_user ((id), sp+(nr*2)); \
179 __put_user ((val), sp+(nr*2+1)); \
182 NEW_AUX_ENT(0, AT_NULL, 0);
187 NEW_AUX_ENT (0, AT_PHDR, load_addr + exec->e_phoff);
188 NEW_AUX_ENT (1, AT_PHENT, sizeof (struct elf_phdr));
189 NEW_AUX_ENT (2, AT_PHNUM, exec->e_phnum);
190 NEW_AUX_ENT (3, AT_PAGESZ, ELF_EXEC_PAGESIZE);
191 NEW_AUX_ENT (4, AT_BASE, interp_load_addr);
192 NEW_AUX_ENT (5, AT_FLAGS, 0);
193 NEW_AUX_ENT (6, AT_ENTRY, (elf_addr_t) exec->e_entry);
194 NEW_AUX_ENT (7, AT_UID, (elf_addr_t) current->uid);
195 NEW_AUX_ENT (8, AT_EUID, (elf_addr_t) current->euid);
196 NEW_AUX_ENT (9, AT_GID, (elf_addr_t) current->gid);
197 NEW_AUX_ENT (10, AT_EGID, (elf_addr_t) current->egid);
206 __put_user((elf_addr_t)argc,--sp);
207 current->mm->arg_start = (unsigned long) p;
209 __put_user((unsigned long)p,argv++);
212 __put_user((unsigned long) NULL, argv);
213 current->mm->arg_end = current->mm->env_start = (unsigned long) p;
215 __put_user((unsigned long)p,envp++);
218 __put_user((unsigned long) NULL, envp);
219 current->mm->env_end = (unsigned long) p;
224 /* This is much more generalized than the library routine read function,
225 * so we keep this separate. Technically the library read function
226 * is only provided so that we can read a.out libraries that have
229 static unsigned int load_irix_interp(struct elfhdr * interp_elf_ex,
230 struct file * interpreter,
231 unsigned int *interp_load_addr)
233 struct elf_phdr *elf_phdata = NULL;
234 struct elf_phdr *eppnt;
236 unsigned int load_addr;
239 unsigned int last_bss;
246 error = load_addr = 0;
249 print_elfhdr(interp_elf_ex);
252 /* First of all, some simple consistency checks */
253 if ((interp_elf_ex->e_type != ET_EXEC &&
254 interp_elf_ex->e_type != ET_DYN) ||
255 !interpreter->f_op->mmap) {
256 printk("IRIX interp has bad e_type %d\n", interp_elf_ex->e_type);
260 /* Now read in all of the header information */
261 if(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE) {
262 printk("IRIX interp header bigger than a page (%d)\n",
263 (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum));
267 elf_phdata = kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
271 printk("Cannot kmalloc phdata for IRIX interp.\n");
275 /* If the size of this structure has changed, then punt, since
276 * we will be doing the wrong thing.
278 if(interp_elf_ex->e_phentsize != 32) {
279 printk("IRIX interp e_phentsize == %d != 32 ",
280 interp_elf_ex->e_phentsize);
285 retval = kernel_read(interpreter, interp_elf_ex->e_phoff,
287 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
290 dump_phdrs(elf_phdata, interp_elf_ex->e_phnum);
294 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
295 if(eppnt->p_type == PT_LOAD) {
296 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
298 unsigned long vaddr = 0;
299 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
300 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
301 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
302 elf_type |= MAP_FIXED;
303 vaddr = eppnt->p_vaddr;
305 pr_debug("INTERP do_mmap(%p, %08lx, %08lx, %08lx, %08lx, %08lx) ",
307 (unsigned long) (eppnt->p_filesz + (eppnt->p_vaddr & 0xfff)),
308 (unsigned long) elf_prot, (unsigned long) elf_type,
309 (unsigned long) (eppnt->p_offset & 0xfffff000));
310 down_write(¤t->mm->mmap_sem);
311 error = do_mmap(interpreter, vaddr,
312 eppnt->p_filesz + (eppnt->p_vaddr & 0xfff),
314 eppnt->p_offset & 0xfffff000);
315 up_write(¤t->mm->mmap_sem);
317 if(error < 0 && error > -1024) {
318 printk("Aieee IRIX interp mmap error=%d\n", error);
319 break; /* Real error */
321 pr_debug("error=%08lx ", (unsigned long) error);
322 if(!load_addr && interp_elf_ex->e_type == ET_DYN) {
324 pr_debug("load_addr = error ");
327 /* Find the end of the file mapping for this phdr, and keep
328 * track of the largest address we see for this.
330 k = eppnt->p_vaddr + eppnt->p_filesz;
331 if(k > elf_bss) elf_bss = k;
333 /* Do the same thing for the memory mapping - between
334 * elf_bss and last_bss is the bss section.
336 k = eppnt->p_memsz + eppnt->p_vaddr;
337 if(k > last_bss) last_bss = k;
342 /* Now use mmap to map the library into memory. */
343 if(error < 0 && error > -1024) {
344 pr_debug("got error %d\n", error);
349 /* Now fill out the bss section. First pad the last page up
350 * to the page boundary, and then perform a mmap to make sure
351 * that there are zero-mapped pages up to and including the
354 pr_debug("padzero(%08lx) ", (unsigned long) (elf_bss));
356 len = (elf_bss + 0xfff) & 0xfffff000; /* What we have mapped so far */
358 pr_debug("last_bss[%08lx] len[%08lx]\n", (unsigned long) last_bss,
359 (unsigned long) len);
361 /* Map the last of the bss segment */
362 if (last_bss > len) {
363 down_write(¤t->mm->mmap_sem);
364 do_brk(len, (last_bss - len));
365 up_write(¤t->mm->mmap_sem);
369 *interp_load_addr = load_addr;
370 return ((unsigned int) interp_elf_ex->e_entry);
373 /* Check sanity of IRIX elf executable header. */
374 static int verify_binary(struct elfhdr *ehp, struct linux_binprm *bprm)
376 if (memcmp(ehp->e_ident, ELFMAG, SELFMAG) != 0)
379 /* First of all, some simple consistency checks */
380 if((ehp->e_type != ET_EXEC && ehp->e_type != ET_DYN) ||
381 !bprm->file->f_op->mmap) {
385 /* XXX Don't support N32 or 64bit binaries yet because they can
386 * XXX and do execute 64 bit instructions and expect all registers
387 * XXX to be 64 bit as well. We need to make the kernel save
388 * XXX all registers as 64bits on cpu's capable of this at
389 * XXX exception time plus frob the XTLB exception vector.
391 if((ehp->e_flags & EF_MIPS_ABI2))
398 * This is where the detailed check is performed. Irix binaries
399 * use interpreters with 'libc.so' in the name, so this function
400 * can differentiate between Linux and Irix binaries.
402 static inline int look_for_irix_interpreter(char **name,
403 struct file **interpreter,
404 struct elfhdr *interp_elf_ex,
405 struct elf_phdr *epp,
406 struct linux_binprm *bprm, int pnum)
409 int retval = -EINVAL;
410 struct file *file = NULL;
413 for(i = 0; i < pnum; i++, epp++) {
414 if (epp->p_type != PT_INTERP)
417 /* It is illegal to have two interpreters for one executable. */
421 *name = kmalloc(epp->p_filesz + strlen(IRIX_EMUL), GFP_KERNEL);
425 strcpy(*name, IRIX_EMUL);
426 retval = kernel_read(bprm->file, epp->p_offset, (*name + 16),
431 file = open_exec(*name);
433 retval = PTR_ERR(file);
436 retval = kernel_read(file, 0, bprm->buf, 128);
440 *interp_elf_ex = *(struct elfhdr *) bprm->buf;
452 static inline int verify_irix_interpreter(struct elfhdr *ihp)
454 if (memcmp(ihp->e_ident, ELFMAG, SELFMAG) != 0)
459 #define EXEC_MAP_FLAGS (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE)
461 static inline void map_executable(struct file *fp, struct elf_phdr *epp, int pnum,
462 unsigned int *estack, unsigned int *laddr,
463 unsigned int *scode, unsigned int *ebss,
464 unsigned int *ecode, unsigned int *edata,
470 for(i = 0; i < pnum; i++, epp++) {
471 if(epp->p_type != PT_LOAD)
475 prot = (epp->p_flags & PF_R) ? PROT_READ : 0;
476 prot |= (epp->p_flags & PF_W) ? PROT_WRITE : 0;
477 prot |= (epp->p_flags & PF_X) ? PROT_EXEC : 0;
478 down_write(¤t->mm->mmap_sem);
479 (void) do_mmap(fp, (epp->p_vaddr & 0xfffff000),
480 (epp->p_filesz + (epp->p_vaddr & 0xfff)),
481 prot, EXEC_MAP_FLAGS,
482 (epp->p_offset & 0xfffff000));
483 up_write(¤t->mm->mmap_sem);
485 /* Fixup location tracking vars. */
486 if((epp->p_vaddr & 0xfffff000) < *estack)
487 *estack = (epp->p_vaddr & 0xfffff000);
489 *laddr = epp->p_vaddr - epp->p_offset;
490 if(epp->p_vaddr < *scode)
491 *scode = epp->p_vaddr;
493 tmp = epp->p_vaddr + epp->p_filesz;
496 if((epp->p_flags & PF_X) && *ecode < tmp)
501 tmp = epp->p_vaddr + epp->p_memsz;
508 static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
509 struct file *interp, unsigned int *iladdr,
510 int pnum, mm_segment_t old_fs,
511 unsigned int *eentry)
515 *eentry = 0xffffffff;
516 for(i = 0; i < pnum; i++, epp++) {
517 if(epp->p_type != PT_INTERP)
520 /* We should have fielded this error elsewhere... */
521 if(*eentry != 0xffffffff)
525 *eentry = load_irix_interp(ihp, interp, iladdr);
531 if (*eentry == 0xffffffff)
538 * IRIX maps a page at 0x200000 that holds information about the
539 * process and the system, here we map the page and fill the
542 static void irix_map_prda_page(void)
547 down_write(¤t->mm->mmap_sem);
548 v = do_brk (PRDA_ADDRESS, PAGE_SIZE);
549 up_write(¤t->mm->mmap_sem);
554 pp = (struct prda *) v;
555 pp->prda_sys.t_pid = current->pid;
556 pp->prda_sys.t_prid = read_c0_prid();
557 pp->prda_sys.t_rpid = current->pid;
559 /* We leave the rest set to zero */
564 /* These are the functions used to load ELF style executables and shared
565 * libraries. There is no binary dependent code anywhere else.
567 static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
569 struct elfhdr elf_ex, interp_elf_ex;
570 struct file *interpreter;
571 struct elf_phdr *elf_phdata, *elf_ihdr, *elf_ephdr;
572 unsigned int load_addr, elf_bss, elf_brk;
573 unsigned int elf_entry, interp_load_addr = 0;
574 unsigned int start_code, end_code, end_data, elf_stack;
575 int retval, has_interp, has_ephdr, size, i;
576 char *elf_interpreter;
580 has_interp = has_ephdr = 0;
581 elf_ihdr = elf_ephdr = NULL;
582 elf_ex = *((struct elfhdr *) bprm->buf);
585 if (verify_binary(&elf_ex, bprm))
589 * Telling -o32 static binaries from Linux and Irix apart from each
590 * other is difficult. There are 2 differences to be noted for static
591 * binaries from the 2 operating systems:
593 * 1) Irix binaries have their .text section before their .init
594 * section. Linux binaries are just the opposite.
596 * 2) Irix binaries usually have <= 12 sections and Linux
597 * binaries have > 20.
599 * We will use Method #2 since Method #1 would require us to read in
600 * the section headers which is way too much overhead. This appears
601 * to work for everything we have ran into so far. If anyone has a
602 * better method to tell the binaries apart, I'm listening.
604 if (elf_ex.e_shnum > 20)
608 print_elfhdr(&elf_ex);
611 /* Now read in all of the header information */
612 size = elf_ex.e_phentsize * elf_ex.e_phnum;
615 elf_phdata = kmalloc(size, GFP_KERNEL);
616 if (elf_phdata == NULL) {
621 retval = kernel_read(bprm->file, elf_ex.e_phoff, (char *)elf_phdata, size);
626 dump_phdrs(elf_phdata, elf_ex.e_phnum);
629 /* Set some things for later. */
630 for(i = 0; i < elf_ex.e_phnum; i++) {
631 switch(elf_phdata[i].p_type) {
634 elf_ihdr = &elf_phdata[i];
638 elf_ephdr = &elf_phdata[i];
648 elf_stack = 0xffffffff;
649 elf_interpreter = NULL;
650 start_code = 0xffffffff;
655 * If we get a return value, we change the value to be ENOEXEC
656 * so that we can exit gracefully and the main binary format
657 * search loop in 'fs/exec.c' will move onto the next handler
658 * which should be the normal ELF binary handler.
660 retval = look_for_irix_interpreter(&elf_interpreter, &interpreter,
661 &interp_elf_ex, elf_phdata, bprm,
668 if (elf_interpreter) {
669 retval = verify_irix_interpreter(&interp_elf_ex);
671 goto out_free_interp;
674 /* OK, we are done with that, now set up the arg stuff,
675 * and then start this sucker up.
678 if (!bprm->sh_bang && !bprm->p)
679 goto out_free_interp;
681 /* Flush all traces of the currently running executable */
682 retval = flush_old_exec(bprm);
684 goto out_free_dentry;
686 /* OK, This is the point of no return */
687 current->mm->end_data = 0;
688 current->mm->end_code = 0;
689 current->mm->mmap = NULL;
690 current->flags &= ~PF_FORKNOEXEC;
691 elf_entry = (unsigned int) elf_ex.e_entry;
693 /* Do this so that we can load the interpreter, if need be. We will
694 * change some of these later.
696 setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
697 current->mm->start_stack = bprm->p;
699 /* At this point, we assume that the image should be loaded at
700 * fixed address, not at a variable address.
705 map_executable(bprm->file, elf_phdata, elf_ex.e_phnum, &elf_stack,
706 &load_addr, &start_code, &elf_bss, &end_code,
707 &end_data, &elf_brk);
709 if(elf_interpreter) {
710 retval = map_interpreter(elf_phdata, &interp_elf_ex,
711 interpreter, &interp_load_addr,
712 elf_ex.e_phnum, old_fs, &elf_entry);
713 kfree(elf_interpreter);
716 printk("Unable to load IRIX ELF interpreter\n");
717 send_sig(SIGSEGV, current, 0);
726 set_personality(PER_IRIX32);
727 set_binfmt(&irix_format);
729 current->flags &= ~PF_FORKNOEXEC;
730 bprm->p = (unsigned long)
731 create_irix_tables((char *)bprm->p, bprm->argc, bprm->envc,
732 (elf_interpreter ? &elf_ex : NULL),
733 load_addr, interp_load_addr, regs, elf_ephdr);
734 current->mm->start_brk = current->mm->brk = elf_brk;
735 current->mm->end_code = end_code;
736 current->mm->start_code = start_code;
737 current->mm->end_data = end_data;
738 current->mm->start_stack = bprm->p;
740 /* Calling set_brk effectively mmaps the pages that we need for the
741 * bss and break sections.
743 set_brk(elf_bss, elf_brk);
746 * IRIX maps a page at 0x200000 which holds some system
747 * information. Programs depend on this.
749 irix_map_prda_page();
753 pr_debug("(start_brk) %lx\n" , (long) current->mm->start_brk);
754 pr_debug("(end_code) %lx\n" , (long) current->mm->end_code);
755 pr_debug("(start_code) %lx\n" , (long) current->mm->start_code);
756 pr_debug("(end_data) %lx\n" , (long) current->mm->end_data);
757 pr_debug("(start_stack) %lx\n" , (long) current->mm->start_stack);
758 pr_debug("(brk) %lx\n" , (long) current->mm->brk);
760 #if 0 /* XXX No fucking way dude... */
761 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
762 * and some applications "depend" upon this behavior.
763 * Since we do not have the power to recompile these, we
764 * emulate the SVr4 behavior. Sigh.
766 down_write(¤t->mm->mmap_sem);
767 (void) do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
768 MAP_FIXED | MAP_PRIVATE, 0);
769 up_write(¤t->mm->mmap_sem);
772 start_thread(regs, elf_entry, bprm->p);
773 if (current->ptrace & PT_PTRACED)
774 send_sig(SIGTRAP, current, 0);
780 allow_write_access(interpreter);
783 kfree(elf_interpreter);
790 /* This is really simpleminded and specialized - we are loading an
791 * a.out library that is given an ELF header.
793 static int load_irix_library(struct file *file)
795 struct elfhdr elf_ex;
796 struct elf_phdr *elf_phdata = NULL;
797 unsigned int len = 0;
804 error = kernel_read(file, 0, (char *) &elf_ex, sizeof(elf_ex));
805 if (error != sizeof(elf_ex))
808 if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
811 /* First of all, some simple consistency checks. */
812 if(elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
816 /* Now read in all of the header information. */
817 if(sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE)
820 elf_phdata = kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
821 if (elf_phdata == NULL)
824 retval = kernel_read(file, elf_ex.e_phoff, (char *) elf_phdata,
825 sizeof(struct elf_phdr) * elf_ex.e_phnum);
828 for(i=0; i<elf_ex.e_phnum; i++)
829 if((elf_phdata + i)->p_type == PT_LOAD) j++;
836 while(elf_phdata->p_type != PT_LOAD) elf_phdata++;
838 /* Now use mmap to map the library into memory. */
839 down_write(¤t->mm->mmap_sem);
840 error = do_mmap(file,
841 elf_phdata->p_vaddr & 0xfffff000,
842 elf_phdata->p_filesz + (elf_phdata->p_vaddr & 0xfff),
843 PROT_READ | PROT_WRITE | PROT_EXEC,
844 MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
845 elf_phdata->p_offset & 0xfffff000);
846 up_write(¤t->mm->mmap_sem);
848 k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
849 if (k > elf_bss) elf_bss = k;
851 if (error != (elf_phdata->p_vaddr & 0xfffff000)) {
858 len = (elf_phdata->p_filesz + elf_phdata->p_vaddr+ 0xfff) & 0xfffff000;
859 bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
861 down_write(¤t->mm->mmap_sem);
862 do_brk(len, bss-len);
863 up_write(¤t->mm->mmap_sem);
869 /* Called through irix_syssgi() to map an elf image given an FD,
870 * a phdr ptr USER_PHDRP in userspace, and a count CNT telling how many
871 * phdrs there are in the USER_PHDRP array. We return the vaddr the
872 * first phdr was successfully mapped to.
874 unsigned long irix_mapelf(int fd, struct elf_phdr __user *user_phdrp, int cnt)
876 unsigned long type, vaddr, filesz, offset, flags;
877 struct elf_phdr __user *hp;
881 pr_debug("irix_mapelf: fd[%d] user_phdrp[%p] cnt[%d]\n",
882 fd, user_phdrp, cnt);
884 /* First get the verification out of the way. */
886 if (!access_ok(VERIFY_READ, hp, (sizeof(struct elf_phdr) * cnt))) {
887 pr_debug("irix_mapelf: bad pointer to ELF PHDR!\n");
893 dump_phdrs(user_phdrp, cnt);
896 for (i = 0; i < cnt; i++, hp++) {
897 if (__get_user(type, &hp->p_type))
899 if (type != PT_LOAD) {
900 printk("irix_mapelf: One section is not PT_LOAD!\n");
909 printk("irix_mapelf: Bogon filp!\n");
915 for(i = 0; i < cnt; i++, hp++) {
918 retval = __get_user(vaddr, &hp->p_vaddr);
919 retval |= __get_user(filesz, &hp->p_filesz);
920 retval |= __get_user(offset, &hp->p_offset);
921 retval |= __get_user(flags, &hp->p_flags);
925 prot = (flags & PF_R) ? PROT_READ : 0;
926 prot |= (flags & PF_W) ? PROT_WRITE : 0;
927 prot |= (flags & PF_X) ? PROT_EXEC : 0;
929 down_write(¤t->mm->mmap_sem);
930 retval = do_mmap(filp, (vaddr & 0xfffff000),
931 (filesz + (vaddr & 0xfff)),
932 prot, (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
933 (offset & 0xfffff000));
934 up_write(¤t->mm->mmap_sem);
936 if (retval != (vaddr & 0xfffff000)) {
937 printk("irix_mapelf: do_mmap fails with %d!\n", retval);
943 pr_debug("irix_mapelf: Success, returning %08lx\n",
944 (unsigned long) user_phdrp->p_vaddr);
948 if (__get_user(vaddr, &user_phdrp->p_vaddr))
957 * Modelled on fs/exec.c:aout_core_dump()
958 * Jeremy Fitzhardinge <jeremy@sw.oz.au>
961 /* These are the only things you should do on a core-file: use only these
962 * functions to write out all the necessary info.
964 static int dump_write(struct file *file, const void __user *addr, int nr)
966 return file->f_op->write(file, (const char __user *) addr, nr, &file->f_pos) == nr;
969 static int dump_seek(struct file *file, off_t off)
971 if (file->f_op->llseek) {
972 if (file->f_op->llseek(file, off, 0) != off)
979 /* Decide whether a segment is worth dumping; default is yes to be
980 * sure (missing info is worse than too much; etc).
981 * Personally I'd include everything, and use the coredump limit...
983 * I think we should skip something. But I am not sure how. H.J.
985 static inline int maydump(struct vm_area_struct *vma)
987 if (!(vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC)))
990 if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
992 if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
998 /* An ELF note in memory. */
1003 unsigned int datasz;
1007 static int notesize(struct memelfnote *en)
1011 sz = sizeof(struct elf_note);
1012 sz += roundup(strlen(en->name) + 1, 4);
1013 sz += roundup(en->datasz, 4);
1020 #define DUMP_WRITE(addr, nr) \
1021 if (!dump_write(file, (addr), (nr))) \
1023 #define DUMP_SEEK(off) \
1024 if (!dump_seek(file, (off))) \
1027 static int writenote(struct memelfnote *men, struct file *file)
1031 en.n_namesz = strlen(men->name) + 1;
1032 en.n_descsz = men->datasz;
1033 en.n_type = men->type;
1035 DUMP_WRITE(&en, sizeof(en));
1036 DUMP_WRITE(men->name, en.n_namesz);
1037 /* XXX - cast from long long to long to avoid need for libgcc.a */
1038 DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
1039 DUMP_WRITE(men->data, men->datasz);
1040 DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
1050 #define DUMP_WRITE(addr, nr) \
1051 if (!dump_write(file, (addr), (nr))) \
1053 #define DUMP_SEEK(off) \
1054 if (!dump_seek(file, (off))) \
1059 * This is a two-pass process; first we find the offsets of the bits,
1060 * and then they are actually written out. If we run out of core limit
1063 static int irix_core_dump(long signr, struct pt_regs * regs, struct file *file)
1070 struct vm_area_struct *vma;
1072 off_t offset = 0, dataoff;
1073 int limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
1075 struct memelfnote notes[3];
1076 struct elf_prstatus prstatus; /* NT_PRSTATUS */
1077 elf_fpregset_t fpu; /* NT_PRFPREG */
1078 struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
1080 /* Count what's needed to dump, up to the limit of coredump size. */
1083 for (vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
1086 int sz = vma->vm_end-vma->vm_start;
1088 if (size+sz >= limit)
1097 printk("irix_core_dump: %d segs taking %d bytes\n", segs, size);
1100 /* Set up header. */
1101 memcpy(elf.e_ident, ELFMAG, SELFMAG);
1102 elf.e_ident[EI_CLASS] = ELFCLASS32;
1103 elf.e_ident[EI_DATA] = ELFDATA2LSB;
1104 elf.e_ident[EI_VERSION] = EV_CURRENT;
1105 elf.e_ident[EI_OSABI] = ELF_OSABI;
1106 memset(elf.e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
1108 elf.e_type = ET_CORE;
1109 elf.e_machine = ELF_ARCH;
1110 elf.e_version = EV_CURRENT;
1112 elf.e_phoff = sizeof(elf);
1115 elf.e_ehsize = sizeof(elf);
1116 elf.e_phentsize = sizeof(struct elf_phdr);
1117 elf.e_phnum = segs+1; /* Include notes. */
1118 elf.e_shentsize = 0;
1126 current->flags |= PF_DUMPCORE;
1128 DUMP_WRITE(&elf, sizeof(elf));
1129 offset += sizeof(elf); /* Elf header. */
1130 offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers. */
1132 /* Set up the notes in similar form to SVR4 core dumps made
1133 * with info from their /proc.
1135 memset(&psinfo, 0, sizeof(psinfo));
1136 memset(&prstatus, 0, sizeof(prstatus));
1138 notes[0].name = "CORE";
1139 notes[0].type = NT_PRSTATUS;
1140 notes[0].datasz = sizeof(prstatus);
1141 notes[0].data = &prstatus;
1142 prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
1143 prstatus.pr_sigpend = current->pending.signal.sig[0];
1144 prstatus.pr_sighold = current->blocked.sig[0];
1145 psinfo.pr_pid = prstatus.pr_pid = current->pid;
1146 psinfo.pr_ppid = prstatus.pr_ppid = current->parent->pid;
1147 psinfo.pr_pgrp = prstatus.pr_pgrp = process_group(current);
1148 psinfo.pr_sid = prstatus.pr_sid = process_session(current);
1149 if (current->pid == current->tgid) {
1151 * This is the record for the group leader. Add in the
1152 * cumulative times of previous dead threads. This total
1153 * won't include the time of each live thread whose state
1154 * is included in the core dump. The final total reported
1155 * to our parent process when it calls wait4 will include
1156 * those sums as well as the little bit more time it takes
1157 * this and each other thread to finish dying after the
1158 * core dump synchronization phase.
1160 jiffies_to_timeval(current->utime + current->signal->utime,
1161 &prstatus.pr_utime);
1162 jiffies_to_timeval(current->stime + current->signal->stime,
1163 &prstatus.pr_stime);
1165 jiffies_to_timeval(current->utime, &prstatus.pr_utime);
1166 jiffies_to_timeval(current->stime, &prstatus.pr_stime);
1168 jiffies_to_timeval(current->signal->cutime, &prstatus.pr_cutime);
1169 jiffies_to_timeval(current->signal->cstime, &prstatus.pr_cstime);
1171 if (sizeof(elf_gregset_t) != sizeof(struct pt_regs)) {
1172 printk("sizeof(elf_gregset_t) (%d) != sizeof(struct pt_regs) "
1173 "(%d)\n", sizeof(elf_gregset_t), sizeof(struct pt_regs));
1175 *(struct pt_regs *)&prstatus.pr_reg = *regs;
1178 notes[1].name = "CORE";
1179 notes[1].type = NT_PRPSINFO;
1180 notes[1].datasz = sizeof(psinfo);
1181 notes[1].data = &psinfo;
1182 i = current->state ? ffz(~current->state) + 1 : 0;
1183 psinfo.pr_state = i;
1184 psinfo.pr_sname = (i < 0 || i > 5) ? '.' : "RSDZTD"[i];
1185 psinfo.pr_zomb = psinfo.pr_sname == 'Z';
1186 psinfo.pr_nice = task_nice(current);
1187 psinfo.pr_flag = current->flags;
1188 psinfo.pr_uid = current->uid;
1189 psinfo.pr_gid = current->gid;
1195 len = current->mm->arg_end - current->mm->arg_start;
1196 len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
1197 (void *) copy_from_user(&psinfo.pr_psargs,
1198 (const char __user *)current->mm->arg_start, len);
1199 for (i = 0; i < len; i++)
1200 if (psinfo.pr_psargs[i] == 0)
1201 psinfo.pr_psargs[i] = ' ';
1202 psinfo.pr_psargs[len] = 0;
1206 strlcpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
1208 /* Try to dump the FPU. */
1209 prstatus.pr_fpvalid = dump_fpu (regs, &fpu);
1210 if (!prstatus.pr_fpvalid) {
1213 notes[2].name = "CORE";
1214 notes[2].type = NT_PRFPREG;
1215 notes[2].datasz = sizeof(fpu);
1216 notes[2].data = &fpu;
1219 /* Write notes phdr entry. */
1221 struct elf_phdr phdr;
1224 for(i = 0; i < numnote; i++)
1225 sz += notesize(¬es[i]);
1227 phdr.p_type = PT_NOTE;
1228 phdr.p_offset = offset;
1236 offset += phdr.p_filesz;
1237 DUMP_WRITE(&phdr, sizeof(phdr));
1240 /* Page-align dumped data. */
1241 dataoff = offset = roundup(offset, PAGE_SIZE);
1243 /* Write program headers for segments dump. */
1244 for(vma = current->mm->mmap, i = 0;
1245 i < segs && vma != NULL; vma = vma->vm_next) {
1246 struct elf_phdr phdr;
1251 sz = vma->vm_end - vma->vm_start;
1253 phdr.p_type = PT_LOAD;
1254 phdr.p_offset = offset;
1255 phdr.p_vaddr = vma->vm_start;
1257 phdr.p_filesz = maydump(vma) ? sz : 0;
1259 offset += phdr.p_filesz;
1260 phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
1261 if (vma->vm_flags & VM_WRITE)
1262 phdr.p_flags |= PF_W;
1263 if (vma->vm_flags & VM_EXEC)
1264 phdr.p_flags |= PF_X;
1265 phdr.p_align = PAGE_SIZE;
1267 DUMP_WRITE(&phdr, sizeof(phdr));
1270 for(i = 0; i < numnote; i++)
1271 if (!writenote(¬es[i], file))
1278 for(i = 0, vma = current->mm->mmap;
1279 i < segs && vma != NULL;
1280 vma = vma->vm_next) {
1281 unsigned long addr = vma->vm_start;
1282 unsigned long len = vma->vm_end - vma->vm_start;
1288 printk("elf_core_dump: writing %08lx %lx\n", addr, len);
1290 DUMP_WRITE((void __user *)addr, len);
1293 if ((off_t) file->f_pos != offset) {
1295 printk("elf_core_dump: file->f_pos (%ld) != offset (%ld)\n",
1296 (off_t) file->f_pos, offset);
1304 static int __init init_irix_binfmt(void)
1306 extern int init_inventory(void);
1307 extern asmlinkage unsigned long sys_call_table;
1308 extern asmlinkage unsigned long sys_call_table_irix5;
1313 * Copy the IRIX5 syscall table (8000 bytes) into the main syscall
1314 * table. The IRIX5 calls are located by an offset of 8000 bytes
1315 * from the beginning of the main table.
1317 memcpy((void *) ((unsigned long) &sys_call_table + 8000),
1318 &sys_call_table_irix5, 8000);
1320 return register_binfmt(&irix_format);
1323 static void __exit exit_irix_binfmt(void)
1326 * Remove the Irix ELF loader.
1328 unregister_binfmt(&irix_format);
1331 module_init(init_irix_binfmt)
1332 module_exit(exit_irix_binfmt)