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 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/uaccess.h>
35 #include <asm/mipsregs.h>
36 #include <asm/prctl.h>
38 #define DLINFO_ITEMS 12
40 #include <linux/elf.h>
44 static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs);
45 static int load_irix_library(struct file *);
46 static int irix_core_dump(long signr, struct pt_regs * regs,
49 static struct linux_binfmt irix_format = {
50 NULL, THIS_MODULE, load_irix_binary, load_irix_library,
51 irix_core_dump, PAGE_SIZE
55 #define elf_addr_t unsigned long
59 /* Debugging routines. */
60 static char *get_elf_p_type(Elf32_Word p_type)
65 case PT_NULL: return("PT_NULL"); break;
66 case PT_LOAD: return("PT_LOAD"); break;
67 case PT_DYNAMIC: return("PT_DYNAMIC"); break;
68 case PT_INTERP: return("PT_INTERP"); break;
69 case PT_NOTE: return("PT_NOTE"); break;
70 case PT_SHLIB: return("PT_SHLIB"); break;
71 case PT_PHDR: return("PT_PHDR"); break;
72 case PT_LOPROC: return("PT_LOPROC/REGINFO"); break;
73 case PT_HIPROC: return("PT_HIPROC"); break;
74 default: return("PT_BOGUS"); break;
78 static void print_elfhdr(struct elfhdr *ehp)
82 printk("ELFHDR: e_ident<");
83 for(i = 0; i < (EI_NIDENT - 1); i++) printk("%x ", ehp->e_ident[i]);
84 printk("%x>\n", ehp->e_ident[i]);
85 printk(" e_type[%04x] e_machine[%04x] e_version[%08lx]\n",
86 (unsigned short) ehp->e_type, (unsigned short) ehp->e_machine,
87 (unsigned long) ehp->e_version);
88 printk(" e_entry[%08lx] e_phoff[%08lx] e_shoff[%08lx] "
90 (unsigned long) ehp->e_entry, (unsigned long) ehp->e_phoff,
91 (unsigned long) ehp->e_shoff, (unsigned long) ehp->e_flags);
92 printk(" e_ehsize[%04x] e_phentsize[%04x] e_phnum[%04x]\n",
93 (unsigned short) ehp->e_ehsize, (unsigned short) ehp->e_phentsize,
94 (unsigned short) ehp->e_phnum);
95 printk(" e_shentsize[%04x] e_shnum[%04x] e_shstrndx[%04x]\n",
96 (unsigned short) ehp->e_shentsize, (unsigned short) ehp->e_shnum,
97 (unsigned short) ehp->e_shstrndx);
100 static void print_phdr(int i, struct elf_phdr *ep)
102 printk("PHDR[%d]: p_type[%s] p_offset[%08lx] p_vaddr[%08lx] "
103 "p_paddr[%08lx]\n", i, get_elf_p_type(ep->p_type),
104 (unsigned long) ep->p_offset, (unsigned long) ep->p_vaddr,
105 (unsigned long) ep->p_paddr);
106 printk(" p_filesz[%08lx] p_memsz[%08lx] p_flags[%08lx] "
107 "p_align[%08lx]\n", (unsigned long) ep->p_filesz,
108 (unsigned long) ep->p_memsz, (unsigned long) ep->p_flags,
109 (unsigned long) ep->p_align);
112 static void dump_phdrs(struct elf_phdr *ep, int pnum)
116 for(i = 0; i < pnum; i++, ep++) {
117 if((ep->p_type == PT_LOAD) ||
118 (ep->p_type == PT_INTERP) ||
119 (ep->p_type == PT_PHDR))
123 #endif /* (DEBUG_ELF) */
125 static void set_brk(unsigned long start, unsigned long end)
127 start = PAGE_ALIGN(start);
128 end = PAGE_ALIGN(end);
131 down_write(¤t->mm->mmap_sem);
132 do_brk(start, end - start);
133 up_write(¤t->mm->mmap_sem);
137 /* We need to explicitly zero any fractional pages
138 * after the data section (i.e. bss). This would
139 * contain the junk from the file that should not
142 static void padzero(unsigned long elf_bss)
146 nbyte = elf_bss & (PAGE_SIZE-1);
148 nbyte = PAGE_SIZE - nbyte;
149 clear_user((void *) elf_bss, nbyte);
153 unsigned long * create_irix_tables(char * p, int argc, int envc,
154 struct elfhdr * exec, unsigned int load_addr,
155 unsigned int interp_load_addr,
156 struct pt_regs *regs, struct elf_phdr *ephdr)
160 elf_addr_t *sp, *csp;
163 printk("create_irix_tables: p[%p] argc[%d] envc[%d] "
164 "load_addr[%08x] interp_load_addr[%08x]\n",
165 p, argc, envc, load_addr, interp_load_addr);
167 sp = (elf_addr_t *) (~15UL & (unsigned long) p);
169 csp -= exec ? DLINFO_ITEMS*2 : 2;
172 csp -= 1; /* argc itself */
173 if ((unsigned long)csp & 15UL) {
174 sp -= (16UL - ((unsigned long)csp & 15UL)) / sizeof(*sp);
178 * Put the ELF interpreter info on the stack
180 #define NEW_AUX_ENT(nr, id, val) \
181 __put_user ((id), sp+(nr*2)); \
182 __put_user ((val), sp+(nr*2+1)); \
185 NEW_AUX_ENT(0, AT_NULL, 0);
190 NEW_AUX_ENT (0, AT_PHDR, load_addr + exec->e_phoff);
191 NEW_AUX_ENT (1, AT_PHENT, sizeof (struct elf_phdr));
192 NEW_AUX_ENT (2, AT_PHNUM, exec->e_phnum);
193 NEW_AUX_ENT (3, AT_PAGESZ, ELF_EXEC_PAGESIZE);
194 NEW_AUX_ENT (4, AT_BASE, interp_load_addr);
195 NEW_AUX_ENT (5, AT_FLAGS, 0);
196 NEW_AUX_ENT (6, AT_ENTRY, (elf_addr_t) exec->e_entry);
197 NEW_AUX_ENT (7, AT_UID, (elf_addr_t) current->uid);
198 NEW_AUX_ENT (8, AT_EUID, (elf_addr_t) current->euid);
199 NEW_AUX_ENT (9, AT_GID, (elf_addr_t) current->gid);
200 NEW_AUX_ENT (10, AT_EGID, (elf_addr_t) current->egid);
209 __put_user((elf_addr_t)argc,--sp);
210 current->mm->arg_start = (unsigned long) p;
212 __put_user((unsigned long)p,argv++);
215 __put_user((unsigned long) NULL, argv);
216 current->mm->arg_end = current->mm->env_start = (unsigned long) p;
218 __put_user((unsigned long)p,envp++);
221 __put_user((unsigned long) NULL, envp);
222 current->mm->env_end = (unsigned long) p;
227 /* This is much more generalized than the library routine read function,
228 * so we keep this separate. Technically the library read function
229 * is only provided so that we can read a.out libraries that have
232 static unsigned int load_irix_interp(struct elfhdr * interp_elf_ex,
233 struct file * interpreter,
234 unsigned int *interp_load_addr)
236 struct elf_phdr *elf_phdata = NULL;
237 struct elf_phdr *eppnt;
239 unsigned int load_addr;
242 unsigned int last_bss;
249 error = load_addr = 0;
252 print_elfhdr(interp_elf_ex);
255 /* First of all, some simple consistency checks */
256 if ((interp_elf_ex->e_type != ET_EXEC &&
257 interp_elf_ex->e_type != ET_DYN) ||
258 !irix_elf_check_arch(interp_elf_ex) ||
259 !interpreter->f_op->mmap) {
260 printk("IRIX interp has bad e_type %d\n", interp_elf_ex->e_type);
264 /* Now read in all of the header information */
265 if(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE) {
266 printk("IRIX interp header bigger than a page (%d)\n",
267 (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum));
271 elf_phdata = kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
275 printk("Cannot kmalloc phdata for IRIX interp.\n");
279 /* If the size of this structure has changed, then punt, since
280 * we will be doing the wrong thing.
282 if(interp_elf_ex->e_phentsize != 32) {
283 printk("IRIX interp e_phentsize == %d != 32 ",
284 interp_elf_ex->e_phentsize);
289 retval = kernel_read(interpreter, interp_elf_ex->e_phoff,
291 sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
294 dump_phdrs(elf_phdata, interp_elf_ex->e_phnum);
298 for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
299 if(eppnt->p_type == PT_LOAD) {
300 int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
302 unsigned long vaddr = 0;
303 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
304 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
305 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
306 elf_type |= MAP_FIXED;
307 vaddr = eppnt->p_vaddr;
310 printk("INTERP do_mmap(%p, %08lx, %08lx, %08lx, %08lx, %08lx) ",
312 (unsigned long) (eppnt->p_filesz + (eppnt->p_vaddr & 0xfff)),
313 (unsigned long) elf_prot, (unsigned long) elf_type,
314 (unsigned long) (eppnt->p_offset & 0xfffff000));
316 down_write(¤t->mm->mmap_sem);
317 error = do_mmap(interpreter, vaddr,
318 eppnt->p_filesz + (eppnt->p_vaddr & 0xfff),
320 eppnt->p_offset & 0xfffff000);
321 up_write(¤t->mm->mmap_sem);
323 if(error < 0 && error > -1024) {
324 printk("Aieee IRIX interp mmap error=%d\n", error);
325 break; /* Real error */
328 printk("error=%08lx ", (unsigned long) error);
330 if(!load_addr && interp_elf_ex->e_type == ET_DYN) {
333 printk("load_addr = error ");
337 /* Find the end of the file mapping for this phdr, and keep
338 * track of the largest address we see for this.
340 k = eppnt->p_vaddr + eppnt->p_filesz;
341 if(k > elf_bss) elf_bss = k;
343 /* Do the same thing for the memory mapping - between
344 * elf_bss and last_bss is the bss section.
346 k = eppnt->p_memsz + eppnt->p_vaddr;
347 if(k > last_bss) last_bss = k;
354 /* Now use mmap to map the library into memory. */
355 if(error < 0 && error > -1024) {
357 printk("got error %d\n", error);
363 /* Now fill out the bss section. First pad the last page up
364 * to the page boundary, and then perform a mmap to make sure
365 * that there are zero-mapped pages up to and including the
369 printk("padzero(%08lx) ", (unsigned long) (elf_bss));
372 len = (elf_bss + 0xfff) & 0xfffff000; /* What we have mapped so far */
375 printk("last_bss[%08lx] len[%08lx]\n", (unsigned long) last_bss,
376 (unsigned long) len);
379 /* Map the last of the bss segment */
380 if (last_bss > len) {
381 down_write(¤t->mm->mmap_sem);
382 do_brk(len, (last_bss - len));
383 up_write(¤t->mm->mmap_sem);
387 *interp_load_addr = load_addr;
388 return ((unsigned int) interp_elf_ex->e_entry);
391 /* Check sanity of IRIX elf executable header. */
392 static int verify_binary(struct elfhdr *ehp, struct linux_binprm *bprm)
394 if (memcmp(ehp->e_ident, ELFMAG, SELFMAG) != 0)
397 /* First of all, some simple consistency checks */
398 if((ehp->e_type != ET_EXEC && ehp->e_type != ET_DYN) ||
399 !irix_elf_check_arch(ehp) || !bprm->file->f_op->mmap) {
403 /* Only support MIPS ARCH2 or greater IRIX binaries for now. */
404 if(!(ehp->e_flags & EF_MIPS_ARCH) && !(ehp->e_flags & 0x04)) {
408 /* XXX Don't support N32 or 64bit binaries yet because they can
409 * XXX and do execute 64 bit instructions and expect all registers
410 * XXX to be 64 bit as well. We need to make the kernel save
411 * XXX all registers as 64bits on cpu's capable of this at
412 * XXX exception time plus frob the XTLB exception vector.
414 if((ehp->e_flags & 0x20)) {
418 return 0; /* It's ok. */
421 #define IRIX_INTERP_PREFIX "/usr/gnemul/irix"
423 /* Look for an IRIX ELF interpreter. */
424 static inline int look_for_irix_interpreter(char **name,
425 struct file **interpreter,
426 struct elfhdr *interp_elf_ex,
427 struct elf_phdr *epp,
428 struct linux_binprm *bprm, int pnum)
431 int retval = -EINVAL;
432 struct file *file = NULL;
435 for(i = 0; i < pnum; i++, epp++) {
436 if (epp->p_type != PT_INTERP)
439 /* It is illegal to have two interpreters for one executable. */
443 *name = kmalloc((epp->p_filesz + strlen(IRIX_INTERP_PREFIX)),
448 strcpy(*name, IRIX_INTERP_PREFIX);
449 retval = kernel_read(bprm->file, epp->p_offset, (*name + 16),
454 file = open_exec(*name);
456 retval = PTR_ERR(file);
459 retval = kernel_read(file, 0, bprm->buf, 128);
463 *interp_elf_ex = *(struct elfhdr *) bprm->buf;
475 static inline int verify_irix_interpreter(struct elfhdr *ihp)
477 if (memcmp(ihp->e_ident, ELFMAG, SELFMAG) != 0)
482 #define EXEC_MAP_FLAGS (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE)
484 static inline void map_executable(struct file *fp, struct elf_phdr *epp, int pnum,
485 unsigned int *estack, unsigned int *laddr,
486 unsigned int *scode, unsigned int *ebss,
487 unsigned int *ecode, unsigned int *edata,
493 for(i = 0; i < pnum; i++, epp++) {
494 if(epp->p_type != PT_LOAD)
498 prot = (epp->p_flags & PF_R) ? PROT_READ : 0;
499 prot |= (epp->p_flags & PF_W) ? PROT_WRITE : 0;
500 prot |= (epp->p_flags & PF_X) ? PROT_EXEC : 0;
501 down_write(¤t->mm->mmap_sem);
502 (void) do_mmap(fp, (epp->p_vaddr & 0xfffff000),
503 (epp->p_filesz + (epp->p_vaddr & 0xfff)),
504 prot, EXEC_MAP_FLAGS,
505 (epp->p_offset & 0xfffff000));
506 up_write(¤t->mm->mmap_sem);
508 /* Fixup location tracking vars. */
509 if((epp->p_vaddr & 0xfffff000) < *estack)
510 *estack = (epp->p_vaddr & 0xfffff000);
512 *laddr = epp->p_vaddr - epp->p_offset;
513 if(epp->p_vaddr < *scode)
514 *scode = epp->p_vaddr;
516 tmp = epp->p_vaddr + epp->p_filesz;
519 if((epp->p_flags & PF_X) && *ecode < tmp)
524 tmp = epp->p_vaddr + epp->p_memsz;
531 static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
532 struct file *interp, unsigned int *iladdr,
533 int pnum, mm_segment_t old_fs,
534 unsigned int *eentry)
538 *eentry = 0xffffffff;
539 for(i = 0; i < pnum; i++, epp++) {
540 if(epp->p_type != PT_INTERP)
543 /* We should have fielded this error elsewhere... */
544 if(*eentry != 0xffffffff)
548 *eentry = load_irix_interp(ihp, interp, iladdr);
554 if (*eentry == 0xffffffff)
561 * IRIX maps a page at 0x200000 that holds information about the
562 * process and the system, here we map the page and fill the
565 void irix_map_prda_page (void)
570 down_write(¤t->mm->mmap_sem);
571 v = do_brk (PRDA_ADDRESS, PAGE_SIZE);
572 up_write(¤t->mm->mmap_sem);
577 pp = (struct prda *) v;
578 pp->prda_sys.t_pid = current->pid;
579 pp->prda_sys.t_prid = read_c0_prid();
580 pp->prda_sys.t_rpid = current->pid;
582 /* We leave the rest set to zero */
587 /* These are the functions used to load ELF style executables and shared
588 * libraries. There is no binary dependent code anywhere else.
590 static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
592 struct elfhdr elf_ex, interp_elf_ex;
593 struct file *interpreter;
594 struct elf_phdr *elf_phdata, *elf_ihdr, *elf_ephdr;
595 unsigned int load_addr, elf_bss, elf_brk;
596 unsigned int elf_entry, interp_load_addr = 0;
597 unsigned int start_code, end_code, end_data, elf_stack;
598 int retval, has_interp, has_ephdr, size, i;
599 char *elf_interpreter;
603 has_interp = has_ephdr = 0;
604 elf_ihdr = elf_ephdr = 0;
605 elf_ex = *((struct elfhdr *) bprm->buf);
608 if (verify_binary(&elf_ex, bprm))
612 print_elfhdr(&elf_ex);
615 /* Now read in all of the header information */
616 size = elf_ex.e_phentsize * elf_ex.e_phnum;
619 elf_phdata = kmalloc(size, GFP_KERNEL);
620 if (elf_phdata == NULL) {
625 retval = kernel_read(bprm->file, elf_ex.e_phoff, (char *)elf_phdata, size);
631 dump_phdrs(elf_phdata, elf_ex.e_phnum);
634 /* Set some things for later. */
635 for(i = 0; i < elf_ex.e_phnum; i++) {
636 switch(elf_phdata[i].p_type) {
639 elf_ihdr = &elf_phdata[i];
643 elf_ephdr = &elf_phdata[i];
654 elf_stack = 0xffffffff;
655 elf_interpreter = NULL;
656 start_code = 0xffffffff;
660 retval = look_for_irix_interpreter(&elf_interpreter,
662 &interp_elf_ex, elf_phdata, bprm,
667 if (elf_interpreter) {
668 retval = verify_irix_interpreter(&interp_elf_ex);
670 goto out_free_interp;
673 /* OK, we are done with that, now set up the arg stuff,
674 * and then start this sucker up.
677 if (!bprm->sh_bang && !bprm->p)
678 goto out_free_interp;
680 /* Flush all traces of the currently running executable */
681 retval = flush_old_exec(bprm);
683 goto out_free_dentry;
685 /* OK, This is the point of no return */
686 current->mm->end_data = 0;
687 current->mm->end_code = 0;
688 current->mm->mmap = NULL;
689 current->flags &= ~PF_FORKNOEXEC;
690 elf_entry = (unsigned int) elf_ex.e_entry;
692 /* Do this so that we can load the interpreter, if need be. We will
693 * change some of these later.
695 // current->mm->rss = 0;
696 vx_rsspages_sub(current->mm, current->mm->rss);
697 setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
698 current->mm->start_stack = bprm->p;
700 /* At this point, we assume that the image should be loaded at
701 * fixed address, not at a variable address.
706 map_executable(bprm->file, elf_phdata, elf_ex.e_phnum, &elf_stack,
707 &load_addr, &start_code, &elf_bss, &end_code,
708 &end_data, &elf_brk);
710 if(elf_interpreter) {
711 retval = map_interpreter(elf_phdata, &interp_elf_ex,
712 interpreter, &interp_load_addr,
713 elf_ex.e_phnum, old_fs, &elf_entry);
714 kfree(elf_interpreter);
717 printk("Unable to load IRIX ELF interpreter\n");
718 send_sig(SIGSEGV, current, 0);
727 set_personality(PER_IRIX32);
728 set_binfmt(&irix_format);
730 current->flags &= ~PF_FORKNOEXEC;
731 bprm->p = (unsigned long)
732 create_irix_tables((char *)bprm->p, bprm->argc, bprm->envc,
733 (elf_interpreter ? &elf_ex : NULL),
734 load_addr, interp_load_addr, regs, elf_ephdr);
735 current->mm->start_brk = current->mm->brk = elf_brk;
736 current->mm->end_code = end_code;
737 current->mm->start_code = start_code;
738 current->mm->end_data = end_data;
739 current->mm->start_stack = bprm->p;
741 /* Calling set_brk effectively mmaps the pages that we need for the
742 * bss and break sections.
744 set_brk(elf_bss, elf_brk);
747 * IRIX maps a page at 0x200000 which holds some system
748 * information. Programs depend on this.
750 irix_map_prda_page ();
755 printk("(start_brk) %lx\n" , (long) current->mm->start_brk);
756 printk("(end_code) %lx\n" , (long) current->mm->end_code);
757 printk("(start_code) %lx\n" , (long) current->mm->start_code);
758 printk("(end_data) %lx\n" , (long) current->mm->end_data);
759 printk("(start_stack) %lx\n" , (long) current->mm->start_stack);
760 printk("(brk) %lx\n" , (long) current->mm->brk);
763 #if 0 /* XXX No fucking way dude... */
764 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
765 * and some applications "depend" upon this behavior.
766 * Since we do not have the power to recompile these, we
767 * emulate the SVr4 behavior. Sigh.
769 down_write(¤t->mm->mmap_sem);
770 (void) do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
771 MAP_FIXED | MAP_PRIVATE, 0);
772 up_write(¤t->mm->mmap_sem);
775 start_thread(regs, elf_entry, bprm->p);
776 if (current->ptrace & PT_PTRACED)
777 send_sig(SIGTRAP, current, 0);
783 allow_write_access(interpreter);
787 kfree(elf_interpreter);
794 /* This is really simpleminded and specialized - we are loading an
795 * a.out library that is given an ELF header.
797 static int load_irix_library(struct file *file)
799 struct elfhdr elf_ex;
800 struct elf_phdr *elf_phdata = NULL;
801 unsigned int len = 0;
808 error = kernel_read(file, 0, (char *) &elf_ex, sizeof(elf_ex));
809 if (error != sizeof(elf_ex))
812 if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
815 /* First of all, some simple consistency checks. */
816 if(elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
817 !irix_elf_check_arch(&elf_ex) || !file->f_op->mmap)
820 /* Now read in all of the header information. */
821 if(sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE)
824 elf_phdata = kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
825 if (elf_phdata == NULL)
828 retval = kernel_read(file, elf_ex.e_phoff, (char *) elf_phdata,
829 sizeof(struct elf_phdr) * elf_ex.e_phnum);
832 for(i=0; i<elf_ex.e_phnum; i++)
833 if((elf_phdata + i)->p_type == PT_LOAD) j++;
840 while(elf_phdata->p_type != PT_LOAD) elf_phdata++;
842 /* Now use mmap to map the library into memory. */
843 down_write(¤t->mm->mmap_sem);
844 error = do_mmap(file,
845 elf_phdata->p_vaddr & 0xfffff000,
846 elf_phdata->p_filesz + (elf_phdata->p_vaddr & 0xfff),
847 PROT_READ | PROT_WRITE | PROT_EXEC,
848 MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
849 elf_phdata->p_offset & 0xfffff000);
850 up_write(¤t->mm->mmap_sem);
852 k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
853 if (k > elf_bss) elf_bss = k;
855 if (error != (elf_phdata->p_vaddr & 0xfffff000)) {
862 len = (elf_phdata->p_filesz + elf_phdata->p_vaddr+ 0xfff) & 0xfffff000;
863 bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
865 down_write(¤t->mm->mmap_sem);
866 do_brk(len, bss-len);
867 up_write(¤t->mm->mmap_sem);
873 /* Called through irix_syssgi() to map an elf image given an FD,
874 * a phdr ptr USER_PHDRP in userspace, and a count CNT telling how many
875 * phdrs there are in the USER_PHDRP array. We return the vaddr the
876 * first phdr was successfully mapped to.
878 unsigned long irix_mapelf(int fd, struct elf_phdr *user_phdrp, int cnt)
885 printk("irix_mapelf: fd[%d] user_phdrp[%p] cnt[%d]\n",
886 fd, user_phdrp, cnt);
889 /* First get the verification out of the way. */
891 retval = verify_area(VERIFY_READ, hp, (sizeof(struct elf_phdr) * cnt));
894 printk("irix_mapelf: verify_area fails!\n");
900 dump_phdrs(user_phdrp, cnt);
903 for(i = 0; i < cnt; i++, hp++)
904 if(hp->p_type != PT_LOAD) {
905 printk("irix_mapelf: One section is not PT_LOAD!\n");
913 printk("irix_mapelf: Bogon filp!\n");
919 for(i = 0; i < cnt; i++, hp++) {
922 prot = (hp->p_flags & PF_R) ? PROT_READ : 0;
923 prot |= (hp->p_flags & PF_W) ? PROT_WRITE : 0;
924 prot |= (hp->p_flags & PF_X) ? PROT_EXEC : 0;
925 down_write(¤t->mm->mmap_sem);
926 retval = do_mmap(filp, (hp->p_vaddr & 0xfffff000),
927 (hp->p_filesz + (hp->p_vaddr & 0xfff)),
928 prot, (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
929 (hp->p_offset & 0xfffff000));
930 up_write(¤t->mm->mmap_sem);
932 if(retval != (hp->p_vaddr & 0xfffff000)) {
933 printk("irix_mapelf: do_mmap fails with %d!\n", retval);
940 printk("irix_mapelf: Success, returning %08lx\n",
941 (unsigned long) user_phdrp->p_vaddr);
944 return user_phdrp->p_vaddr;
950 * Modelled on fs/exec.c:aout_core_dump()
951 * Jeremy Fitzhardinge <jeremy@sw.oz.au>
954 /* These are the only things you should do on a core-file: use only these
955 * functions to write out all the necessary info.
957 static int dump_write(struct file *file, const void *addr, int nr)
959 return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
962 static int dump_seek(struct file *file, off_t off)
964 if (file->f_op->llseek) {
965 if (file->f_op->llseek(file, off, 0) != off)
972 /* Decide whether a segment is worth dumping; default is yes to be
973 * sure (missing info is worse than too much; etc).
974 * Personally I'd include everything, and use the coredump limit...
976 * I think we should skip something. But I am not sure how. H.J.
978 static inline int maydump(struct vm_area_struct *vma)
980 if (!(vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC)))
983 if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
985 if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
991 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
993 /* An ELF note in memory. */
1002 static int notesize(struct memelfnote *en)
1006 sz = sizeof(struct elf_note);
1007 sz += roundup(strlen(en->name), 4);
1008 sz += roundup(en->datasz, 4);
1015 #define DUMP_WRITE(addr, nr) \
1016 if (!dump_write(file, (addr), (nr))) \
1018 #define DUMP_SEEK(off) \
1019 if (!dump_seek(file, (off))) \
1022 static int writenote(struct memelfnote *men, struct file *file)
1026 en.n_namesz = strlen(men->name);
1027 en.n_descsz = men->datasz;
1028 en.n_type = men->type;
1030 DUMP_WRITE(&en, sizeof(en));
1031 DUMP_WRITE(men->name, en.n_namesz);
1032 /* XXX - cast from long long to long to avoid need for libgcc.a */
1033 DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
1034 DUMP_WRITE(men->data, men->datasz);
1035 DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
1045 #define DUMP_WRITE(addr, nr) \
1046 if (!dump_write(file, (addr), (nr))) \
1048 #define DUMP_SEEK(off) \
1049 if (!dump_seek(file, (off))) \
1054 * This is a two-pass process; first we find the offsets of the bits,
1055 * and then they are actually written out. If we run out of core limit
1058 static int irix_core_dump(long signr, struct pt_regs * regs, struct file *file)
1065 struct vm_area_struct *vma;
1067 off_t offset = 0, dataoff;
1068 int limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
1070 struct memelfnote notes[4];
1071 struct elf_prstatus prstatus; /* NT_PRSTATUS */
1072 elf_fpregset_t fpu; /* NT_PRFPREG */
1073 struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
1075 /* Count what's needed to dump, up to the limit of coredump size. */
1078 for(vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
1081 int sz = vma->vm_end-vma->vm_start;
1083 if (size+sz >= limit)
1092 printk("irix_core_dump: %d segs taking %d bytes\n", segs, size);
1095 /* Set up header. */
1096 memcpy(elf.e_ident, ELFMAG, SELFMAG);
1097 elf.e_ident[EI_CLASS] = ELFCLASS32;
1098 elf.e_ident[EI_DATA] = ELFDATA2LSB;
1099 elf.e_ident[EI_VERSION] = EV_CURRENT;
1100 elf.e_ident[EI_OSABI] = ELF_OSABI;
1101 memset(elf.e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
1103 elf.e_type = ET_CORE;
1104 elf.e_machine = ELF_ARCH;
1105 elf.e_version = EV_CURRENT;
1107 elf.e_phoff = sizeof(elf);
1110 elf.e_ehsize = sizeof(elf);
1111 elf.e_phentsize = sizeof(struct elf_phdr);
1112 elf.e_phnum = segs+1; /* Include notes. */
1113 elf.e_shentsize = 0;
1121 current->flags |= PF_DUMPCORE;
1123 DUMP_WRITE(&elf, sizeof(elf));
1124 offset += sizeof(elf); /* Elf header. */
1125 offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers. */
1127 /* Set up the notes in similar form to SVR4 core dumps made
1128 * with info from their /proc.
1130 memset(&psinfo, 0, sizeof(psinfo));
1131 memset(&prstatus, 0, sizeof(prstatus));
1133 notes[0].name = "CORE";
1134 notes[0].type = NT_PRSTATUS;
1135 notes[0].datasz = sizeof(prstatus);
1136 notes[0].data = &prstatus;
1137 prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
1138 prstatus.pr_sigpend = current->pending.signal.sig[0];
1139 prstatus.pr_sighold = current->blocked.sig[0];
1140 psinfo.pr_pid = prstatus.pr_pid = current->pid;
1141 psinfo.pr_ppid = prstatus.pr_ppid = current->parent->pid;
1142 psinfo.pr_pgrp = prstatus.pr_pgrp = process_group(current);
1143 psinfo.pr_sid = prstatus.pr_sid = current->signal->session;
1144 if (current->pid == current->tgid) {
1146 * This is the record for the group leader. Add in the
1147 * cumulative times of previous dead threads. This total
1148 * won't include the time of each live thread whose state
1149 * is included in the core dump. The final total reported
1150 * to our parent process when it calls wait4 will include
1151 * those sums as well as the little bit more time it takes
1152 * this and each other thread to finish dying after the
1153 * core dump synchronization phase.
1155 jiffies_to_timeval(current->utime + current->signal->utime,
1156 &prstatus.pr_utime);
1157 jiffies_to_timeval(current->stime + current->signal->stime,
1158 &prstatus.pr_stime);
1160 jiffies_to_timeval(current->utime, &prstatus.pr_utime);
1161 jiffies_to_timeval(current->stime, &prstatus.pr_stime);
1163 jiffies_to_timeval(current->signal->cutime, &prstatus.pr_cutime);
1164 jiffies_to_timeval(current->signal->cstime, &prstatus.pr_cstime);
1166 if (sizeof(elf_gregset_t) != sizeof(struct pt_regs)) {
1167 printk("sizeof(elf_gregset_t) (%d) != sizeof(struct pt_regs) "
1168 "(%d)\n", sizeof(elf_gregset_t), sizeof(struct pt_regs));
1170 *(struct pt_regs *)&prstatus.pr_reg = *regs;
1173 notes[1].name = "CORE";
1174 notes[1].type = NT_PRPSINFO;
1175 notes[1].datasz = sizeof(psinfo);
1176 notes[1].data = &psinfo;
1177 i = current->state ? ffz(~current->state) + 1 : 0;
1178 psinfo.pr_state = i;
1179 psinfo.pr_sname = (i < 0 || i > 5) ? '.' : "RSDZTD"[i];
1180 psinfo.pr_zomb = psinfo.pr_sname == 'Z';
1181 psinfo.pr_nice = task_nice(current);
1182 psinfo.pr_flag = current->flags;
1183 psinfo.pr_uid = current->uid;
1184 psinfo.pr_gid = current->gid;
1190 len = current->mm->arg_end - current->mm->arg_start;
1191 len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
1192 copy_from_user(&psinfo.pr_psargs,
1193 (const char *)current->mm->arg_start, len);
1194 for(i = 0; i < len; i++)
1195 if (psinfo.pr_psargs[i] == 0)
1196 psinfo.pr_psargs[i] = ' ';
1197 psinfo.pr_psargs[len] = 0;
1201 strlcpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
1203 notes[2].name = "CORE";
1204 notes[2].type = NT_TASKSTRUCT;
1205 notes[2].datasz = sizeof(*current);
1206 notes[2].data = current;
1208 /* Try to dump the FPU. */
1209 prstatus.pr_fpvalid = dump_fpu (regs, &fpu);
1210 if (!prstatus.pr_fpvalid) {
1213 notes[3].name = "CORE";
1214 notes[3].type = NT_PRFPREG;
1215 notes[3].datasz = sizeof(fpu);
1216 notes[3].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) phdr.p_flags |= PF_W;
1262 if (vma->vm_flags & VM_EXEC) phdr.p_flags |= PF_X;
1263 phdr.p_align = PAGE_SIZE;
1265 DUMP_WRITE(&phdr, sizeof(phdr));
1268 for(i = 0; i < numnote; i++)
1269 if (!writenote(¬es[i], file))
1276 for(i = 0, vma = current->mm->mmap;
1277 i < segs && vma != NULL;
1278 vma = vma->vm_next) {
1279 unsigned long addr = vma->vm_start;
1280 unsigned long len = vma->vm_end - vma->vm_start;
1286 printk("elf_core_dump: writing %08lx %lx\n", addr, len);
1288 DUMP_WRITE((void *)addr, len);
1291 if ((off_t) file->f_pos != offset) {
1293 printk("elf_core_dump: file->f_pos (%ld) != offset (%ld)\n",
1294 (off_t) file->f_pos, offset);
1302 static int __init init_irix_binfmt(void)
1304 int init_inventory(void);
1305 extern asmlinkage unsigned long sys_call_table;
1306 extern asmlinkage unsigned long sys_call_table_irix5;
1311 * Copy the IRIX5 syscall table (8000 bytes) into the main syscall
1312 * table. The IRIX5 calls are located by an offset of 8000 bytes
1313 * from the beginning of the main table.
1315 memcpy((void *) ((unsigned long) &sys_call_table + 8000),
1316 &sys_call_table_irix5, 8000);
1318 return register_binfmt(&irix_format);
1321 static void __exit exit_irix_binfmt(void)
1323 /* Remove the IRIX ELF loaders. */
1324 unregister_binfmt(&irix_format);
1327 module_init(init_irix_binfmt)
1328 module_exit(exit_irix_binfmt)