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comparison src/unexelf.c @ 398:74fd4e045ea6 r21-2-29

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Import from CVS: tag r21-2-29
author cvs
date Mon, 13 Aug 2007 11:13:30 +0200
parents 6240c7796c7a
children 501cfd01ee6d
comparison
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397:f4aeb21a5bad 398:74fd4e045ea6
16 You should have received a copy of the GNU General Public License 16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to 17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */ 19 Boston, MA 02111-1307, USA. */
20 20
21 /* Synched up with: FSF 20.2. */ 21 /* Synched up with: FSF 20.4. */
22 22
23 /* 23 /*
24 * unexec.c - Convert a running program into an a.out file. 24 * unexec.c - Convert a running program into an a.out file.
25 * 25 *
26 * Author: Spencer W. Thomas 26 * Author: Spencer W. Thomas
411 411
412 #ifndef emacs 412 #ifndef emacs
413 #define fatal(a, b, c) fprintf (stderr, a, b, c), exit (1) 413 #define fatal(a, b, c) fprintf (stderr, a, b, c), exit (1)
414 #else 414 #else
415 #include <config.h> 415 #include <config.h>
416 extern void fatal (CONST char *, ...); 416 extern void fatal (const char *, ...);
417 #endif 417 #endif
418 418
419 #include <sys/types.h> 419 #include <sys/types.h>
420 #include <stdio.h> 420 #include <stdio.h>
421 #include <sys/stat.h> 421 #include <sys/stat.h>
422 #include <memory.h> 422 #include <memory.h>
423 #include <string.h> 423 #include <string.h>
424 #include <errno.h> 424 #include <errno.h>
425 #include <unistd.h> 425 #include <unistd.h>
426 #include <fcntl.h> 426 #include <fcntl.h>
427 #if !defined (__NetBSD__) && !defined (__OpenBSD__)
427 #include <elf.h> 428 #include <elf.h>
429 #endif
428 #include <sys/mman.h> 430 #include <sys/mman.h>
429 431 #if defined (__sony_news) && defined (_SYSTYPE_SYSV)
430 #if __GLIBC__ - 0 >= 2 432 #include <sys/elf_mips.h>
433 #include <sym.h>
434 #endif /* __sony_news && _SYSTYPE_SYSV */
435 #ifdef __sgi
436 #include <sym.h> /* for HDRR declaration */
437 #endif /* __sgi */
438
439 #if defined (__alpha__) && !defined (__NetBSD__) && !defined (__OpenBSD__)
440 /* Declare COFF debugging symbol table. This used to be in
441 /usr/include/sym.h, but this file is no longer included in Red Hat
442 5.0 and presumably in any other glibc 2.x based distribution. */
443 typedef struct {
444 short magic;
445 short vstamp;
446 int ilineMax;
447 int idnMax;
448 int ipdMax;
449 int isymMax;
450 int ioptMax;
451 int iauxMax;
452 int issMax;
453 int issExtMax;
454 int ifdMax;
455 int crfd;
456 int iextMax;
457 long cbLine;
458 long cbLineOffset;
459 long cbDnOffset;
460 long cbPdOffset;
461 long cbSymOffset;
462 long cbOptOffset;
463 long cbAuxOffset;
464 long cbSsOffset;
465 long cbSsExtOffset;
466 long cbFdOffset;
467 long cbRfdOffset;
468 long cbExtOffset;
469 } HDRR, *pHDRR;
470 #define cbHDRR sizeof(HDRR)
471 #define hdrNil ((pHDRR)0)
472 #endif
473
474 #ifdef __NetBSD__
475 /*
476 * NetBSD does not have normal-looking user-land ELF support.
477 */
478 # ifdef __alpha__
479 # define ELFSIZE 64
480 # else
481 # define ELFSIZE 32
482 # endif
483 # include <sys/exec_elf.h>
484
485 # define PT_LOAD Elf_pt_load
486 # define SHT_SYMTAB Elf_sht_symtab
487 # define SHT_DYNSYM Elf_sht_dynsym
488 # define SHT_NULL Elf_sht_null
489 # define SHT_NOBITS Elf_sht_nobits
490 # define SHT_REL Elf_sht_rel
491 # define SHT_RELA Elf_sht_rela
492
493 # define SHN_UNDEF Elf_eshn_undefined
494 # define SHN_ABS Elf_eshn_absolute
495 # define SHN_COMMON Elf_eshn_common
496
497 /*
498 * The magic of picking the right size types is handled by the ELFSIZE
499 * definition above.
500 */
501 # ifdef __STDC__
502 # define ElfW(type) Elf_##type
503 # else
504 # define ElfW(type) Elf_/**/type
505 # endif
506
507 # ifdef __alpha__
508 # include <sys/exec_ecoff.h>
509 # define HDRR struct ecoff_symhdr
510 # define pHDRR HDRR *
511 # endif
512 #endif /* __NetBSD__ */
513
514 #ifdef __OpenBSD__
515 # include <sys/exec_elf.h>
516 #endif
517
518 #if __GNU_LIBRARY__ - 0 >= 6
431 # include <link.h> /* get ElfW etc */ 519 # include <link.h> /* get ElfW etc */
432 #endif 520 #endif
433 521
434 #ifndef ElfW 522 #ifndef ElfW
435 # ifdef __STDC__ 523 # ifdef __STDC__
485 (n)++; } while (0) 573 (n)++; } while (0)
486 typedef unsigned char byte; 574 typedef unsigned char byte;
487 575
488 /* Round X up to a multiple of Y. */ 576 /* Round X up to a multiple of Y. */
489 577
490 static int 578 static ElfW(Addr)
491 round_up (int x, int y) 579 round_up (ElfW(Addr) x, ElfW(Addr) y)
492 { 580 {
493 int rem = x % y; 581 int rem = x % y;
494 if (rem == 0) 582 if (rem == 0)
495 return x; 583 return x;
496 return x - rem + y; 584 return x - rem + y;
529 ElfW(Addr) old_bss_addr, new_bss_addr; 617 ElfW(Addr) old_bss_addr, new_bss_addr;
530 ElfW(Word) old_bss_size, new_data2_size; 618 ElfW(Word) old_bss_size, new_data2_size;
531 ElfW(Off) new_data2_offset; 619 ElfW(Off) new_data2_offset;
532 ElfW(Addr) new_data2_addr; 620 ElfW(Addr) new_data2_addr;
533 621
534 int n, nn, old_bss_index, old_data_index; 622 int n, nn, old_bss_index, old_data_index, new_data2_index;
623 int old_sbss_index, old_mdebug_index;
535 struct stat stat_buf; 624 struct stat stat_buf;
536 625
537 /* Open the old file & map it into the address space. */ 626 /* Open the old file & map it into the address space. */
538 627
539 old_file = open (old_name, O_RDONLY); 628 old_file = open (old_name, O_RDONLY);
542 fatal ("Can't open %s for reading: errno %d\n", old_name, errno); 631 fatal ("Can't open %s for reading: errno %d\n", old_name, errno);
543 632
544 if (fstat (old_file, &stat_buf) == -1) 633 if (fstat (old_file, &stat_buf) == -1)
545 fatal ("Can't fstat (%s): errno %d\n", old_name, errno); 634 fatal ("Can't fstat (%s): errno %d\n", old_name, errno);
546 635
547 old_base = mmap (0, stat_buf.st_size, PROT_READ, MAP_SHARED, old_file, 0); 636 old_base = (caddr_t) mmap (0, stat_buf.st_size, PROT_READ, MAP_SHARED, old_file, 0);
548 637
549 if (old_base == (caddr_t) -1) 638 if (old_base == (caddr_t) -1)
550 fatal ("Can't mmap (%s): errno %d\n", old_name, errno); 639 fatal ("Can't mmap (%s): errno %d\n", old_name, errno);
551 640
552 #ifdef DEBUG 641 #ifdef DEBUG
578 break; 667 break;
579 } 668 }
580 if (old_bss_index == old_file_h->e_shnum) 669 if (old_bss_index == old_file_h->e_shnum)
581 fatal ("Can't find .bss in %s.\n", old_name, 0); 670 fatal ("Can't find .bss in %s.\n", old_name, 0);
582 671
583 old_bss_addr = OLD_SECTION_H (old_bss_index).sh_addr; 672 for (old_sbss_index = 1; old_sbss_index < (int) old_file_h->e_shnum;
584 old_bss_size = OLD_SECTION_H (old_bss_index).sh_size; 673 old_sbss_index++)
674 {
675 #ifdef DEBUG
676 fprintf (stderr, "Looking for .sbss - found %s\n",
677 old_section_names + OLD_SECTION_H (old_sbss_index).sh_name);
678 #endif
679 if (!strcmp (old_section_names + OLD_SECTION_H (old_sbss_index).sh_name,
680 ".sbss"))
681 break;
682 }
683 if (old_sbss_index == old_file_h->e_shnum)
684 {
685 old_sbss_index = -1;
686 old_bss_addr = OLD_SECTION_H(old_bss_index).sh_addr;
687 old_bss_size = OLD_SECTION_H(old_bss_index).sh_size;
688 new_data2_offset = OLD_SECTION_H(old_bss_index).sh_offset;
689 new_data2_index = old_bss_index;
690 }
691 else
692 {
693 old_bss_addr = OLD_SECTION_H(old_sbss_index).sh_addr;
694 old_bss_size = OLD_SECTION_H(old_bss_index).sh_size
695 + OLD_SECTION_H(old_sbss_index).sh_size;
696 new_data2_offset = OLD_SECTION_H(old_sbss_index).sh_offset;
697 new_data2_index = old_sbss_index;
698 }
699
700 for (old_mdebug_index = 1; old_mdebug_index < (int) old_file_h->e_shnum;
701 old_mdebug_index++)
702 {
703 #ifdef DEBUG
704 fprintf (stderr, "Looking for .mdebug - found %s\n",
705 old_section_names + OLD_SECTION_H (old_mdebug_index).sh_name);
706 #endif
707 if (!strcmp (old_section_names + OLD_SECTION_H (old_mdebug_index).sh_name,
708 ".mdebug"))
709 break;
710 }
711 if (old_mdebug_index == old_file_h->e_shnum)
712 old_mdebug_index = 0;
713
585 #if defined (emacs) || !defined (DEBUG) 714 #if defined (emacs) || !defined (DEBUG)
586 new_bss_addr = (ElfW(Addr)) sbrk (0); 715 new_bss_addr = (ElfW(Addr)) sbrk (0);
587 #else 716 #else
588 new_bss_addr = old_bss_addr + old_bss_size + 0x1234; 717 new_bss_addr = old_bss_addr + old_bss_size + 0x1234;
589 #endif 718 #endif
590 new_data2_addr = old_bss_addr; 719 new_data2_addr = old_bss_addr;
591 new_data2_size = new_bss_addr - old_bss_addr; 720 new_data2_size = new_bss_addr - old_bss_addr;
592 new_data2_offset = OLD_SECTION_H (old_bss_index).sh_offset;
593 721
594 #ifdef DEBUG 722 #ifdef DEBUG
595 fprintf (stderr, "old_bss_index %d\n", old_bss_index); 723 fprintf (stderr, "old_bss_index %d\n", old_bss_index);
596 fprintf (stderr, "old_bss_addr %x\n", old_bss_addr); 724 fprintf (stderr, "old_bss_addr %x\n", old_bss_addr);
597 fprintf (stderr, "old_bss_size %x\n", old_bss_size); 725 fprintf (stderr, "old_bss_size %x\n", old_bss_size);
616 new_file_size = stat_buf.st_size + old_file_h->e_shentsize + new_data2_size; 744 new_file_size = stat_buf.st_size + old_file_h->e_shentsize + new_data2_size;
617 745
618 if (ftruncate (new_file, new_file_size)) 746 if (ftruncate (new_file, new_file_size))
619 fatal ("Can't ftruncate (%s): errno %d\n", new_name, errno); 747 fatal ("Can't ftruncate (%s): errno %d\n", new_name, errno);
620 748
749 new_base = (caddr_t) mmap (0, new_file_size, PROT_READ | PROT_WRITE,
621 #ifdef UNEXEC_USE_MAP_PRIVATE 750 #ifdef UNEXEC_USE_MAP_PRIVATE
622 new_base = mmap (0, new_file_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, 751 MAP_PRIVATE,
623 new_file, 0);
624 #else 752 #else
625 new_base = mmap (0, new_file_size, PROT_READ | PROT_WRITE, MAP_SHARED, 753 MAP_SHARED,
626 new_file, 0); 754 #endif
627 #endif 755 new_file, 0);
628 756
629 if (new_base == (caddr_t) -1) 757 if (new_base == (caddr_t) -1)
630 fatal ("Can't mmap (%s): errno %d\n", new_name, errno); 758 fatal ("Can't mmap (%s): errno %d\n", new_name, errno);
631 759
632 new_file_h = (ElfW(Ehdr) *) new_base; 760 new_file_h = (ElfW(Ehdr) *) new_base;
672 /* Compute maximum of all requirements for alignment of section. */ 800 /* Compute maximum of all requirements for alignment of section. */
673 ElfW(Word) alignment = (NEW_PROGRAM_H (n)).p_align; 801 ElfW(Word) alignment = (NEW_PROGRAM_H (n)).p_align;
674 if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment) 802 if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment)
675 alignment = OLD_SECTION_H (old_bss_index).sh_addralign; 803 alignment = OLD_SECTION_H (old_bss_index).sh_addralign;
676 804
677 #ifndef __mips /* ifndef added by jwz at suggestion of 805 #ifdef __mips
678 r02kar@x4u2.desy.de (Karsten Kuenne) to avoid 806 /* According to r02kar@x4u2.desy.de (Karsten Kuenne)
679 "Program segment above .bss" when dumping. 807 and oliva@gnu.org (Alexandre Oliva), on IRIX 5.2, we
680 */ 808 always get "Program segment above .bss" when dumping
681 if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz > old_bss_addr) 809 when the executable doesn't have an sbss section. */
682 fatal ("Program segment above .bss in %s\n", old_name, 0); 810 if (old_sbss_index != -1)
683 #endif /* __mips */ 811 #endif /* __mips */
812 if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz
813 > (old_sbss_index == -1
814 ? old_bss_addr
815 : round_up (old_bss_addr, alignment)))
816 fatal ("Program segment above .bss in %s\n", old_name, 0);
684 817
685 if (NEW_PROGRAM_H (n).p_type == PT_LOAD 818 if (NEW_PROGRAM_H (n).p_type == PT_LOAD
686 && (round_up ((int) ((NEW_PROGRAM_H (n)).p_vaddr 819 && (round_up ((NEW_PROGRAM_H (n)).p_vaddr
687 + (NEW_PROGRAM_H (n)).p_filesz), 820 + (NEW_PROGRAM_H (n)).p_filesz,
688 alignment) 821 alignment)
689 == round_up ((int) old_bss_addr, alignment))) 822 == round_up (old_bss_addr, alignment)))
690 break; 823 break;
691 } 824 }
692 if (n < 0) 825 if (n < 0)
693 fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0); 826 fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0);
694 827
828 /* Make sure that the size includes any padding before the old .bss
829 section. */
695 NEW_PROGRAM_H (n).p_filesz = new_bss_addr - NEW_PROGRAM_H (n).p_vaddr; 830 NEW_PROGRAM_H (n).p_filesz = new_bss_addr - NEW_PROGRAM_H (n).p_vaddr;
696 NEW_PROGRAM_H (n).p_memsz = NEW_PROGRAM_H (n).p_filesz; 831 NEW_PROGRAM_H (n).p_memsz = NEW_PROGRAM_H (n).p_filesz;
697 832
698 #if 0 /* Maybe allow section after data2 - does this ever happen? */ 833 #if 0 /* Maybe allow section after data2 - does this ever happen? */
699 for (n = new_file_h->e_phnum - 1; n >= 0; n--) 834 for (n = new_file_h->e_phnum - 1; n >= 0; n--)
724 /* Walk through all section headers, insert the new data2 section right 859 /* Walk through all section headers, insert the new data2 section right
725 before the new bss section. */ 860 before the new bss section. */
726 for (n = 1, nn = 1; n < (int) old_file_h->e_shnum; n++, nn++) 861 for (n = 1, nn = 1; n < (int) old_file_h->e_shnum; n++, nn++)
727 { 862 {
728 caddr_t src; 863 caddr_t src;
729 /* If it is bss section, insert the new data2 section before it. */ 864 /* If it is (s)bss section, insert the new data2 section before it. */
730 if (n == old_bss_index) 865 /* new_data2_index is the index of either old_sbss or old_bss, that was
866 chosen as a section for new_data2. */
867 if (n == new_data2_index)
731 { 868 {
732 /* Steal the data section header for this data2 section. */ 869 /* Steal the data section header for this data2 section. */
733 memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (old_data_index), 870 memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (old_data_index),
734 new_file_h->e_shentsize); 871 new_file_h->e_shentsize);
735 872
742 NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (n).sh_addralign; 879 NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (n).sh_addralign;
743 880
744 /* Now copy over what we have in the memory now. */ 881 /* Now copy over what we have in the memory now. */
745 memcpy (NEW_SECTION_H (nn).sh_offset + new_base, 882 memcpy (NEW_SECTION_H (nn).sh_offset + new_base,
746 (caddr_t) OLD_SECTION_H (n).sh_addr, 883 (caddr_t) OLD_SECTION_H (n).sh_addr,
747 /* #### mrb: should be old_bss_size instead? */
748 new_data2_size); 884 new_data2_size);
749 nn++; 885 nn++;
750 } 886 }
751 887
752 memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n), 888 memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
753 old_file_h->e_shentsize); 889 old_file_h->e_shentsize);
754 890
755 /* The new bss section's size is zero, and its file offset and virtual 891 if (n == old_bss_index
756 address should be off by NEW_DATA2_SIZE. */ 892 /* The new bss and sbss section's size is zero, and its file offset
757 if (n == old_bss_index) 893 and virtual address should be off by NEW_DATA2_SIZE. */
894 || n == old_sbss_index
895 )
758 { 896 {
759 /* NN should be `old_bss_index + 1' at this point. */ 897 /* NN should be `old_s?bss_index + 1' at this point. */
760 NEW_SECTION_H (nn).sh_offset += new_data2_size; 898 NEW_SECTION_H (nn).sh_offset =
761 NEW_SECTION_H (nn).sh_addr += new_data2_size; 899 NEW_SECTION_H (new_data2_index).sh_offset + new_data2_size;
900 NEW_SECTION_H (nn).sh_addr =
901 NEW_SECTION_H (new_data2_index).sh_addr + new_data2_size;
762 /* Let the new bss section address alignment be the same as the 902 /* Let the new bss section address alignment be the same as the
763 section address alignment followed the old bss section, so 903 section address alignment followed the old bss section, so
764 this section will be placed in exactly the same place. */ 904 this section will be placed in exactly the same place. */
765 NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (nn).sh_addralign; 905 NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (nn).sh_addralign;
766 NEW_SECTION_H (nn).sh_size = 0; 906 NEW_SECTION_H (nn).sh_size = 0;
780 Erik Deumens, deumens@qtp.ufl.edu. */ 920 Erik Deumens, deumens@qtp.ufl.edu. */
781 if (NEW_SECTION_H (nn).sh_offset 921 if (NEW_SECTION_H (nn).sh_offset
782 >= OLD_SECTION_H (old_bss_index-1).sh_offset) 922 >= OLD_SECTION_H (old_bss_index-1).sh_offset)
783 NEW_SECTION_H (nn).sh_offset += new_data2_size; 923 NEW_SECTION_H (nn).sh_offset += new_data2_size;
784 #else 924 #else
785 if (NEW_SECTION_H (nn).sh_offset >= new_data2_offset) 925 if (round_up (NEW_SECTION_H (nn).sh_offset,
926 OLD_SECTION_H (old_bss_index).sh_addralign)
927 >= new_data2_offset)
786 NEW_SECTION_H (nn).sh_offset += new_data2_size; 928 NEW_SECTION_H (nn).sh_offset += new_data2_size;
787 #endif 929 #endif
788 /* Any section that was originally placed after the section 930 /* Any section that was originally placed after the section
789 header table should now be off by the size of one section 931 header table should now be off by the size of one section
790 header table entry. */ 932 header table entry. */
809 continue; 951 continue;
810 952
811 /* Write out the sections. .data and .data1 (and data2, called 953 /* Write out the sections. .data and .data1 (and data2, called
812 ".data" in the strings table) get copied from the current process 954 ".data" in the strings table) get copied from the current process
813 instead of the old file. */ 955 instead of the old file. */
814 #ifdef __powerpc__
815 /* The PowerPC has additional 'data' segments which need to be saved */
816 if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") ||
817 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data1") ||
818 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata") ||
819 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata1"))
820 #else
821 if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") 956 if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data")
822 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), 957 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
958 ".sdata")
959 /* Taking these sections from the current process, breaks
960 Linux in a subtle way. Binaries only run on the
961 architecture (e.g. i586 vs i686) of the dumping machine */
962 #ifdef __sgi
963 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
964 ".lit4")
965 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
966 ".lit8")
967 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
968 ".got")
969 #endif
970 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
971 ".sdata1")
972 || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
823 ".data1")) 973 ".data1"))
824 #endif
825 src = (caddr_t) OLD_SECTION_H (n).sh_addr; 974 src = (caddr_t) OLD_SECTION_H (n).sh_addr;
826 else 975 else
827 src = old_base + OLD_SECTION_H (n).sh_offset; 976 src = old_base + OLD_SECTION_H (n).sh_offset;
828 977
829 memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src, 978 memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src,
830 NEW_SECTION_H (nn).sh_size); 979 NEW_SECTION_H (nn).sh_size);
980
981 #ifdef __alpha__
982 /* Update Alpha COFF symbol table: */
983 if (strcmp (old_section_names + OLD_SECTION_H (n).sh_name, ".mdebug")
984 == 0)
985 {
986 pHDRR symhdr = (pHDRR) (NEW_SECTION_H (nn).sh_offset + new_base);
987
988 symhdr->cbLineOffset += new_data2_size;
989 symhdr->cbDnOffset += new_data2_size;
990 symhdr->cbPdOffset += new_data2_size;
991 symhdr->cbSymOffset += new_data2_size;
992 symhdr->cbOptOffset += new_data2_size;
993 symhdr->cbAuxOffset += new_data2_size;
994 symhdr->cbSsOffset += new_data2_size;
995 symhdr->cbSsExtOffset += new_data2_size;
996 symhdr->cbFdOffset += new_data2_size;
997 symhdr->cbRfdOffset += new_data2_size;
998 symhdr->cbExtOffset += new_data2_size;
999 }
1000 #endif /* __alpha__ */
1001
1002 #if defined (__sony_news) && defined (_SYSTYPE_SYSV)
1003 if (NEW_SECTION_H (nn).sh_type == SHT_MIPS_DEBUG && old_mdebug_index)
1004 {
1005 int diff = NEW_SECTION_H(nn).sh_offset
1006 - OLD_SECTION_H(old_mdebug_index).sh_offset;
1007 HDRR *phdr = (HDRR *)(NEW_SECTION_H (nn).sh_offset + new_base);
1008
1009 if (diff)
1010 {
1011 phdr->cbLineOffset += diff;
1012 phdr->cbDnOffset += diff;
1013 phdr->cbPdOffset += diff;
1014 phdr->cbSymOffset += diff;
1015 phdr->cbOptOffset += diff;
1016 phdr->cbAuxOffset += diff;
1017 phdr->cbSsOffset += diff;
1018 phdr->cbSsExtOffset += diff;
1019 phdr->cbFdOffset += diff;
1020 phdr->cbRfdOffset += diff;
1021 phdr->cbExtOffset += diff;
1022 }
1023 }
1024 #endif /* __sony_news && _SYSTYPE_SYSV */
1025
1026 #ifdef __sgi
1027 /* Adjust the HDRR offsets in .mdebug and copy the
1028 line data if it's in its usual 'hole' in the object.
1029 Makes the new file debuggable with dbx.
1030 patches up two problems: the absolute file offsets
1031 in the HDRR record of .mdebug (see /usr/include/syms.h), and
1032 the ld bug that gets the line table in a hole in the
1033 elf file rather than in the .mdebug section proper.
1034 David Anderson. davea@sgi.com Jan 16,1994. */
1035 if (n == old_mdebug_index)
1036 {
1037 #define MDEBUGADJUST(__ct,__fileaddr) \
1038 if (n_phdrr->__ct > 0) \
1039 { \
1040 n_phdrr->__fileaddr += movement; \
1041 }
1042
1043 HDRR * o_phdrr = (HDRR *)((byte *)old_base + OLD_SECTION_H (n).sh_offset);
1044 HDRR * n_phdrr = (HDRR *)((byte *)new_base + NEW_SECTION_H (nn).sh_offset);
1045 unsigned movement = new_data2_size;
1046
1047 MDEBUGADJUST (idnMax, cbDnOffset);
1048 MDEBUGADJUST (ipdMax, cbPdOffset);
1049 MDEBUGADJUST (isymMax, cbSymOffset);
1050 MDEBUGADJUST (ioptMax, cbOptOffset);
1051 MDEBUGADJUST (iauxMax, cbAuxOffset);
1052 MDEBUGADJUST (issMax, cbSsOffset);
1053 MDEBUGADJUST (issExtMax, cbSsExtOffset);
1054 MDEBUGADJUST (ifdMax, cbFdOffset);
1055 MDEBUGADJUST (crfd, cbRfdOffset);
1056 MDEBUGADJUST (iextMax, cbExtOffset);
1057 /* The Line Section, being possible off in a hole of the object,
1058 requires special handling. */
1059 if (n_phdrr->cbLine > 0)
1060 {
1061 if (o_phdrr->cbLineOffset > (OLD_SECTION_H (n).sh_offset
1062 + OLD_SECTION_H (n).sh_size))
1063 {
1064 /* line data is in a hole in elf. do special copy and adjust
1065 for this ld mistake.
1066 */
1067 n_phdrr->cbLineOffset += movement;
1068
1069 memcpy (n_phdrr->cbLineOffset + new_base,
1070 o_phdrr->cbLineOffset + old_base, n_phdrr->cbLine);
1071 }
1072 else
1073 {
1074 /* somehow line data is in .mdebug as it is supposed to be. */
1075 MDEBUGADJUST (cbLine, cbLineOffset);
1076 }
1077 }
1078 }
1079 #endif /* __sgi */
831 1080
832 /* If it is the symbol table, its st_shndx field needs to be patched. */ 1081 /* If it is the symbol table, its st_shndx field needs to be patched. */
833 if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB 1082 if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB
834 || NEW_SECTION_H (nn).sh_type == SHT_DYNSYM) 1083 || NEW_SECTION_H (nn).sh_type == SHT_DYNSYM)
835 { 1084 {
884 case SHT_RELA: 1133 case SHT_RELA:
885 /* This code handles two different size structs, but there should 1134 /* This code handles two different size structs, but there should
886 be no harm in that provided that r_offset is always the first 1135 be no harm in that provided that r_offset is always the first
887 member. */ 1136 member. */
888 nn = section.sh_info; 1137 nn = section.sh_info;
889 #ifdef __powerpc__
890 /* The PowerPC has additional 'data' segments which need to be saved */
891 if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") ||
892 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data1") ||
893 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata") ||
894 !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata1"))
895 #else
896 if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data") 1138 if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data")
897 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), 1139 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
1140 ".sdata")
1141 #ifdef __sgi
1142 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
1143 ".lit4")
1144 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
1145 ".lit8")
1146 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
1147 ".got")
1148 #endif
1149 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
1150 ".sdata1")
1151 || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
898 ".data1")) 1152 ".data1"))
899 #endif
900 { 1153 {
901 ElfW(Addr) offset = NEW_SECTION_H (nn).sh_addr - 1154 ElfW(Addr) offset = NEW_SECTION_H (nn).sh_addr -
902 NEW_SECTION_H (nn).sh_offset; 1155 NEW_SECTION_H (nn).sh_offset;
903 caddr_t reloc = old_base + section.sh_offset, end; 1156 caddr_t reloc = old_base + section.sh_offset, end;
904 for (end = reloc + section.sh_size; reloc < end; 1157 for (end = reloc + section.sh_size; reloc < end;
905 reloc += section.sh_entsize) 1158 reloc += section.sh_entsize)
906 { 1159 {
907 ElfW(Addr) addr = ((ElfW(Rel) *) reloc)->r_offset - offset; 1160 ElfW(Addr) addr = ((ElfW(Rel) *) reloc)->r_offset - offset;
1161 #ifdef __alpha__
1162 /* The Alpha ELF binutils currently have a bug that
1163 sometimes results in relocs that contain all
1164 zeroes. Work around this for now... */
1165 if (((ElfW(Rel) *) reloc)->r_offset == 0)
1166 continue;
1167 #endif
908 memcpy (new_base + addr, old_base + addr, sizeof(ElfW(Addr))); 1168 memcpy (new_base + addr, old_base + addr, sizeof(ElfW(Addr)));
909 } 1169 }
910 } 1170 }
911 break; 1171 break;
912 } 1172 }