-/* Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992
+/* Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992, 1999, 2000
Free Software Foundation, Inc.
This file is part of XEmacs.
-XEmacs is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
+XEmacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
-XEmacs is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with XEmacs; see the file COPYING. If not, write to
+along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+Boston, MA 02111-1307, USA.
-/* Synched up with: FSF 19.31. */
+In other words, you are welcome to use, share and improve this program.
+You are forbidden to forbid anyone else to use, share and improve
+what you give them. Help stamp out software-hoarding! */
+/* 2000-10-31: Martin Buchholz
+
+ I noticed that xemacs on Irix 6.5 could not write to stderr, e.g.
+ (external-debugging-output "\n")
+ would produce NO output.
+ temacs worked fine, so this was clearly a dumping problem.
+
+ So I copied over the latest available unexelf.c from FSF Emacs,
+ and installed it as unexelfsgi.c in XEmacs.
+ In addition, I converted it to "Clean C", resulting in this file.
+*/
/*
* unexec.c - Convert a running program into an a.out file.
* Modified heavily since then.
*
* Synopsis:
- * unexec (new_name, a_name, data_start, bss_start, entry_address)
- * char *new_name, *a_name;
+ * unexec (new_name, old_name, data_start, bss_start, entry_address)
+ * char *new_name, *old_name;
* unsigned data_start, bss_start, entry_address;
*
* Takes a snapshot of the program and makes an a.out format file in the
* file named by the string argument new_name.
- * If a_name is non-NULL, the symbol table will be taken from the given file.
- * On some machines, an existing a_name file is required.
+ * If old_name is non-NULL, the symbol table will be taken from the given file.
+ * On some machines, an existing old_name file is required.
*
* The boundaries within the a.out file may be adjusted with the data_start
* and bss_start arguments. Either or both may be given as 0 for defaults.
* The value you specify may be rounded down to a suitable boundary
* as required by the machine you are using.
*
- * Specifying zero for data_start means the boundary between text and data
- * should not be the same as when the program was loaded.
- * If NO_REMAP is defined, the argument data_start is ignored and the
- * segment boundaries are never changed.
- *
* Bss_start indicates how much of the data segment is to be saved in the
* a.out file and restored when the program is executed. It gives the lowest
* unsaved address, and is rounded up to a page boundary. The default when 0
*
* The new file is set up to start at entry_address.
*
- * If you make improvements I'd like to get them too.
- * harpo!utah-cs!thomas, thomas@Utah-20
- *
*/
/* Even more heavily modified by james@bigtex.cactus.org of Dell Computer Co.
Link Info Adralgn Entsize
[1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
+ 0 0 0x1 0
[2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
+ 3 0 0x4 0x4
[3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
+ 4 1 0x4 0x10
[4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
+ 0 0 0x1 0
[5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
+ 3 7 0x4 0x8
[6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
+ 0 0 0x4 0
[7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
+ 0 0 0x4 0
[9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
+ 0 0 0x4 0
[10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
+ 0 0 0x4 0
[11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
+ 0 0 0x4 0
[12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
+ 0 0 0x4 0
[13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
+ 0 0 0x4 0
[14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
+ 4 0 0x4 0x8
[16] 8 3 0x80a98f4 0x608f4 0x449c .bss
- 0 0 0x4 0
+ 0 0 0x4 0
[17] 2 0 0 0x608f4 0x9b90 .symtab
- 18 371 0x4 0x10
+ 18 371 0x4 0x10
[18] 3 0 0 0x6a484 0x8526 .strtab
- 0 0 0x1 0
+ 0 0 0x1 0
[19] 3 0 0 0x729aa 0x93 .shstrtab
- 0 0 0x1 0
+ 0 0 0x1 0
[20] 1 0 0 0x72a3d 0x68b7 .comment
- 0 0 0x1 0
+ 0 0 0x1 0
raid:/nfs/raid/src/dist-18.56/src> dump -h xemacs
Link Info Adralgn Entsize
[1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
+ 0 0 0x1 0
[2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
+ 3 0 0x4 0x4
[3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
+ 4 1 0x4 0x10
[4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
+ 0 0 0x1 0
[5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
+ 3 7 0x4 0x8
[6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
+ 0 0 0x4 0
[7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
+ 0 0 0x4 0
[9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
+ 0 0 0x4 0
[10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
+ 0 0 0x4 0
[11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
+ 0 0 0x4 0
[12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
+ 0 0 0x4 0
[13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
+ 0 0 0x4 0
[14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
+ 4 0 0x4 0x8
[16] 8 3 0x80c6800 0x7d800 0 .bss
- 0 0 0x4 0
+ 0 0 0x4 0
[17] 2 0 0 0x7d800 0x9b90 .symtab
- 18 371 0x4 0x10
+ 18 371 0x4 0x10
[18] 3 0 0 0x87390 0x8526 .strtab
- 0 0 0x1 0
+ 0 0 0x1 0
[19] 3 0 0 0x8f8b6 0x93 .shstrtab
- 0 0 0x1 0
+ 0 0 0x1 0
[20] 1 0 0 0x8f949 0x68b7 .comment
- 0 0 0x1 0
+ 0 0 0x1 0
[21] 1 3 0x80a98f4 0x608f4 0x1cf0c .data
- 0 0 0x4 0
+ 0 0 0x4 0
* This is an example of how the file header is changed. "Shoff" is
* the section header offset within the file. Since that table is
Type Offset Vaddr Paddr
Filesz Memsz Flags Align
-6 0x34 0x8048034 0
-0xa0 0xa0 5 0
+6 0x34 0x8048034 0
+0xa0 0xa0 5 0
-3 0xd4 0 0
-0x13 0 4 0
+3 0xd4 0 0
+0x13 0 4 0
-1 0x34 0x8048034 0
-0x3f2f9 0x3f2f9 5 0x1000
+1 0x34 0x8048034 0
+0x3f2f9 0x3f2f9 5 0x1000
-1 0x3f330 0x8088330 0
-0x215c4 0x25a60 7 0x1000
+1 0x3f330 0x8088330 0
+0x215c4 0x25a60 7 0x1000
-2 0x60874 0x80a9874 0
-0x80 0 7 0
+2 0x60874 0x80a9874 0
+0x80 0 7 0
raid:/nfs/raid/src/dist-18.56/src> dump -o xemacs
Type Offset Vaddr Paddr
Filesz Memsz Flags Align
-6 0x34 0x8048034 0
-0xa0 0xa0 5 0
+6 0x34 0x8048034 0
+0xa0 0xa0 5 0
-3 0xd4 0 0
-0x13 0 4 0
+3 0xd4 0 0
+0x13 0 4 0
-1 0x34 0x8048034 0
-0x3f2f9 0x3f2f9 5 0x1000
+1 0x34 0x8048034 0
+0x3f2f9 0x3f2f9 5 0x1000
-1 0x3f330 0x8088330 0
-0x3e4d0 0x3e4d0 7 0x1000
+1 0x3f330 0x8088330 0
+0x3e4d0 0x3e4d0 7 0x1000
-2 0x60874 0x80a9874 0
-0x80 0 7 0
+2 0x60874 0x80a9874 0
+0x80 0 7 0
*/
\f
-/* Modified by wtien@urbana.mcd.mot.com of Motorola Inc.
- *
+/* Modified by wtien@urbana.mcd.mot.com of Motorola Inc.
+ *
* The above mechanism does not work if the unexeced ELF file is being
- * re-layout by other applications (such as `strip'). All the applications
+ * re-layout by other applications (such as `strip'). All the applications
* that re-layout the internal of ELF will layout all sections in ascending
- * order of their file offsets. After the re-layout, the data2 section will
- * still be the LAST section in the section header vector, but its file offset
+ * order of their file offsets. After the re-layout, the data2 section will
+ * still be the LAST section in the section header vector, but its file offset
* is now being pushed far away down, and causes part of it not to be mapped
- * in (ie. not covered by the load segment entry in PHDR vector), therefore
+ * in (ie. not covered by the load segment entry in PHDR vector), therefore
* causes the new binary to fail.
*
* The solution is to modify the unexec algorithm to insert the new data2
* section header right before the new bss section header, so their file
- * offsets will be in the ascending order. Since some of the section's (all
- * sections AFTER the bss section) indexes are now changed, we also need to
- * modify some fields to make them point to the right sections. This is done
+ * offsets will be in the ascending order. Since some of the section's (all
+ * sections AFTER the bss section) indexes are now changed, we also need to
+ * modify some fields to make them point to the right sections. This is done
* by macro PATCH_INDEX. All the fields that need to be patched are:
- *
+ *
* 1. ELF header e_shstrndx field.
* 2. section header sh_link and sh_info field.
* 3. symbol table entry st_shndx field.
Link Info Adralgn Entsize
[1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
+ 0 0 0x1 0
[2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
+ 3 0 0x4 0x4
[3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
+ 4 1 0x4 0x10
[4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
+ 0 0 0x1 0
[5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
+ 3 7 0x4 0x8
[6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
+ 0 0 0x4 0
[7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
+ 0 0 0x4 0
[9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
+ 0 0 0x4 0
[10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
+ 0 0 0x4 0
[11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
+ 0 0 0x4 0
[12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
+ 0 0 0x4 0
[13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
+ 0 0 0x4 0
[14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
+ 0 0 0x4 0x4
[15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
+ 4 0 0x4 0x8
[16] 1 3 0x80a98f4 0x608f4 0x1cf0c .data
- 0 0 0x4 0
+ 0 0 0x4 0
[17] 8 3 0x80c6800 0x7d800 0 .bss
- 0 0 0x4 0
+ 0 0 0x4 0
[18] 2 0 0 0x7d800 0x9b90 .symtab
- 19 371 0x4 0x10
+ 19 371 0x4 0x10
[19] 3 0 0 0x87390 0x8526 .strtab
- 0 0 0x1 0
+ 0 0 0x1 0
[20] 3 0 0 0x8f8b6 0x93 .shstrtab
- 0 0 0x1 0
+ 0 0 0x1 0
[21] 1 0 0 0x8f949 0x68b7 .comment
- 0 0 0x1 0
+ 0 0 0x1 0
*/
-
- /* More mods, by Jack Repenning <jackr@sgi.com>, Fri Aug 11 15:45:52 1995
-
- Same algorithm as immediately above. However, the detailed
- calculations of the various locations needed significant
- overhaul.
-
- At the point of the old .bss, the file offsets and the memory
- addresses do distinct, slightly snaky things:
-
- offset of .bss is meaningless and unpredictable
- addr of .bss is meaningful
- alignment of .bss is important to addr, so there may be a small
- gap in address range before start of bss
- offset of next section is rounded up modulo 0x1000
- the hole so-introduced is zero-filled, so it can be mapped in as
- the first partial-page of bss (the rest of the bss is mapped from
- /dev/zero)
- I suppose you could view this not as a hole, but as the beginning
- of the bss, actually present in the file. But you should not
- push that worldview too far, as the linker still knows that the
- "offset" claimed for the bss is unused, and seems not always
- careful about setting it.
-
- We are doing all our tricks at this same rather complicated
- location (isn't life fun?):
-
- insert a new data section to contain now-initialized old bss and
- heap
- define a zero-length bss just so there is one
-
- The offset of the new data section is dictated by its current
- address (which, of course, we want also to be its addr): the
- loader maps in the whole file region containing old data, rodata,
- got, and new data as a single mapped segment, starting at the
- address of the first chunk; the rest have to be laid out in the
- file such that the map into the right spots. That is:
-
- offset(newdata) ==
- addrInRunningMemory(newdata)-aIRM(olddata)
- + offset(oldData)
-
- This would not necessarily match the oldbss offset, even if it
- were carefully calculated! We must compute this.
-
- The linker that built temacs has also already arranged that
- olddata is properly page-aligned (not necessarily beginning on a
- page, but rather that a page's worth of the low bits of addr and
- offset match). We preserve this.
-
- addr(bss) is alignment-constrained from the end of the new data.
- Since we base endof(newdata) on sbrk(), we have a page boundary
- (in both offset and addr) and meet any alignment constraint,
- needing no alignment adjustment of this location and no
- mini-hole. Or, if you like, we've allowed sbrk() to "compute"
- the mini-hole size for us.
-
- That puts newbss beginning on a page boundary, both in offset and
- addr. (offset(bss) is still meaningless, but what the heck,
- we'll fix it up.)
-
- Since newbss has zero length, and its offset (however
- meaningless) is page aligned, we place the next section exactly
- there, with no hole needed to restore page alignment.
-
- So, the shift for all sections beyond the playing field is:
-
- new_bss_addr - roundup(old_bss_addr,0x1000)
-
- */
- /* Still more mods... Olivier Galibert 19971705
- - support for .sbss section (automagically changed to data without
- name change)
- - support for 64bits ABI (will need a bunch of fixes in the rest
- of the code before it works
- */
\f
+#ifndef emacs
+#define fatal(a, b, c) fprintf (stderr, a, b, c), exit (1)
+#include <string.h>
+#else
+#include <config.h>
+extern void fatal (const char *, ...);
+#endif
+
#include <sys/types.h>
#include <stdio.h>
#include <sys/stat.h>
#include <memory.h>
-#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
+#if !defined (__NetBSD__) && !defined (__OpenBSD__)
#include <elf.h>
-#include <sym.h> /* for HDRR declaration */
+#endif
#include <sys/mman.h>
-#include <config.h>
-#include "lisp.h"
-
-/* in 64bits mode, use 64bits elf */
-#ifdef _ABI64
-typedef Elf64_Shdr l_Elf_Shdr;
-typedef Elf64_Phdr l_Elf_Phdr;
-typedef Elf64_Ehdr l_Elf_Ehdr;
-typedef Elf64_Addr l_Elf_Addr;
-typedef Elf64_Word l_Elf_Word;
-typedef Elf64_Off l_Elf_Off;
-typedef Elf64_Sym l_Elf_Sym;
-#else
-typedef Elf32_Shdr l_Elf_Shdr;
-typedef Elf32_Phdr l_Elf_Phdr;
-typedef Elf32_Ehdr l_Elf_Ehdr;
-typedef Elf32_Addr l_Elf_Addr;
-typedef Elf32_Word l_Elf_Word;
-typedef Elf32_Off l_Elf_Off;
-typedef Elf32_Sym l_Elf_Sym;
+#if defined (__sony_news) && defined (_SYSTYPE_SYSV)
+#include <sys/elf_mips.h>
+#include <sym.h>
+#endif /* __sony_news && _SYSTYPE_SYSV */
+#if __sgi
+#include <syms.h> /* for HDRR declaration */
+#endif /* __sgi */
+
+#if defined (__alpha__) && !defined (__NetBSD__) && !defined (__OpenBSD__)
+/* Declare COFF debugging symbol table. This used to be in
+ /usr/include/sym.h, but this file is no longer included in Red Hat
+ 5.0 and presumably in any other glibc 2.x based distribution. */
+typedef struct {
+ short magic;
+ short vstamp;
+ int ilineMax;
+ int idnMax;
+ int ipdMax;
+ int isymMax;
+ int ioptMax;
+ int iauxMax;
+ int issMax;
+ int issExtMax;
+ int ifdMax;
+ int crfd;
+ int iextMax;
+ long cbLine;
+ long cbLineOffset;
+ long cbDnOffset;
+ long cbPdOffset;
+ long cbSymOffset;
+ long cbOptOffset;
+ long cbAuxOffset;
+ long cbSsOffset;
+ long cbSsExtOffset;
+ long cbFdOffset;
+ long cbRfdOffset;
+ long cbExtOffset;
+} HDRR, *pHDRR;
+#define cbHDRR sizeof(HDRR)
+#define hdrNil ((pHDRR)0)
+#endif
+
+#ifdef __NetBSD__
+/*
+ * NetBSD does not have normal-looking user-land ELF support.
+ */
+# if defined __alpha__ || defined __sparc_v9__
+# define ELFSIZE 64
+# else
+# define ELFSIZE 32
+# endif
+# include <sys/exec_elf.h>
+
+# ifndef PT_LOAD
+# define PT_LOAD Elf_pt_load
+# if 0 /* was in pkgsrc patches for 20.7 */
+# define SHT_PROGBITS Elf_sht_progbits
+# endif
+# define SHT_SYMTAB Elf_sht_symtab
+# define SHT_DYNSYM Elf_sht_dynsym
+# define SHT_NULL Elf_sht_null
+# define SHT_NOBITS Elf_sht_nobits
+# define SHT_REL Elf_sht_rel
+# define SHT_RELA Elf_sht_rela
+
+# define SHN_UNDEF Elf_eshn_undefined
+# define SHN_ABS Elf_eshn_absolute
+# define SHN_COMMON Elf_eshn_common
+# endif /* !PT_LOAD */
+
+# ifdef __alpha__
+# include <sys/exec_ecoff.h>
+# define HDRR struct ecoff_symhdr
+# define pHDRR HDRR *
+# endif /* __alpha__ */
+
+#ifdef __mips__ /* was in pkgsrc patches for 20.7 */
+# define SHT_MIPS_DEBUG DT_MIPS_FLAGS
+# define HDRR struct Elf_Shdr
+#endif /* __mips__ */
+#endif /* __NetBSD__ */
+
+#ifdef __OpenBSD__
+# include <sys/exec_elf.h>
+#endif
+
+#if __GNU_LIBRARY__ - 0 >= 6
+# include <link.h> /* get ElfW etc */
#endif
+#ifndef ElfW
+# ifdef __STDC__
+# define ElfBitsW(bits, type) Elf##bits##_##type
+# else
+# define ElfBitsW(bits, type) Elf/**/bits/**/_/**/type
+# endif
+# ifdef _LP64
+# define ELFSIZE 64
+# else
+# define ELFSIZE 32
+# endif
+ /* This macro expands `bits' before invoking ElfBitsW. */
+# define ElfExpandBitsW(bits, type) ElfBitsW (bits, type)
+# define ElfW(type) ElfExpandBitsW (ELFSIZE, type)
+#endif
+
+#ifndef ELF_BSS_SECTION_NAME
+#define ELF_BSS_SECTION_NAME ".bss"
+#endif
/* Get the address of a particular section or program header entry,
* accounting for the size of the entries.
*/
+/*
+ On PPC Reference Platform running Solaris 2.5.1
+ the plt section is also of type NOBI like the bss section.
+ (not really stored) and therefore sections after the bss
+ section start at the plt offset. The plt section is always
+ the one just before the bss section.
+ Thus, we modify the test from
+ if (NEW_SECTION_H (nn).sh_offset >= new_data2_offset)
+ to
+ if (NEW_SECTION_H (nn).sh_offset >=
+ OLD_SECTION_H (old_bss_index-1).sh_offset)
+ This is just a hack. We should put the new data section
+ before the .plt section.
+ And we should not have this routine at all but use
+ the libelf library to read the old file and create the new
+ file.
+ The changed code is minimal and depends on prep set in m/prep.h
+ Erik Deumens
+ Quantum Theory Project
+ University of Florida
+ deumens@qtp.ufl.edu
+ Apr 23, 1996
+ */
#define OLD_SECTION_H(n) \
- (*(l_Elf_Shdr *) ((byte *) old_section_h + old_file_h->e_shentsize * (n)))
+ (*(ElfW(Shdr) *) ((byte *) old_section_h + old_file_h->e_shentsize * (n)))
#define NEW_SECTION_H(n) \
- (*(l_Elf_Shdr *) ((byte *) new_section_h + new_file_h->e_shentsize * (n)))
+ (*(ElfW(Shdr) *) ((byte *) new_section_h + new_file_h->e_shentsize * (n)))
#define OLD_PROGRAM_H(n) \
- (*(l_Elf_Phdr *) ((byte *) old_program_h + old_file_h->e_phentsize * (n)))
+ (*(ElfW(Phdr) *) ((byte *) old_program_h + old_file_h->e_phentsize * (n)))
#define NEW_PROGRAM_H(n) \
- (*(l_Elf_Phdr *) ((byte *) new_program_h + new_file_h->e_phentsize * (n)))
+ (*(ElfW(Phdr) *) ((byte *) new_program_h + new_file_h->e_phentsize * (n)))
#define PATCH_INDEX(n) \
do { \
- if ((n) >= old_bss_index) \
+ if ((int) (n) >= old_bss_index) \
(n)++; } while (0)
typedef unsigned char byte;
/* Round X up to a multiple of Y. */
-int
-round_up (x, y)
- int x, y;
+static ElfW(Addr)
+round_up (ElfW(Addr) x, ElfW(Addr) y)
{
int rem = x % y;
if (rem == 0)
if NOERROR is 0; we return -1 if NOERROR is nonzero. */
static int
-find_section (name, section_names, file_name, old_file_h, old_section_h, noerror)
- char *name;
- char *section_names;
- char *file_name;
- l_Elf_Ehdr *old_file_h;
- l_Elf_Shdr *old_section_h;
- int noerror;
+find_section (char *name,
+ char *section_names,
+ char *file_name,
+ ElfW(Ehdr) *old_file_h,
+ ElfW(Shdr) *old_section_h,
+ int noerror)
{
int idx;
if (noerror)
return -1;
else
- fatal ("Can't find .bss in %s.\n", file_name);
+ fatal ("Can't find %s in %s.\n", name, file_name);
}
return idx;
* .data section, and inserting an empty .bss immediately afterwards.
*
*/
-int
-unexec (new_name, old_name, data_start, bss_start, entry_address)
- char *new_name, *old_name;
- uintptr_t data_start, bss_start, entry_address;
+void
+unexec (char *new_name,
+ char *old_name,
+ uintptr_t data_start,
+ uintptr_t bss_start,
+ uintptr_t entry_address)
{
- extern uintptr_t bss_end;
int new_file, old_file, new_file_size;
- /* Pointers to the base of the image of the two files. */
+ /* Pointers to the base of the image of the two files. */
caddr_t old_base, new_base;
/* Pointers to the file, program and section headers for the old and new
- files. */
- l_Elf_Ehdr *old_file_h, *new_file_h;
- l_Elf_Phdr *old_program_h, *new_program_h;
- l_Elf_Shdr *old_section_h, *new_section_h;
+ * files.
+ */
+ ElfW(Ehdr) *old_file_h, *new_file_h;
+ ElfW(Phdr) *old_program_h, *new_program_h;
+ ElfW(Shdr) *old_section_h, *new_section_h;
- /* Point to the section name table in the old file. */
+ /* Point to the section name table in the old file */
char *old_section_names;
- l_Elf_Addr old_bss_addr, new_bss_addr;
- l_Elf_Addr old_base_addr;
- l_Elf_Word old_bss_size, new_data2_size;
- l_Elf_Off new_data2_offset, new_base_offset;
- l_Elf_Addr new_data2_addr;
- l_Elf_Addr new_offsets_shift;
+ ElfW(Addr) old_bss_addr, new_bss_addr;
+ ElfW(Word) old_bss_size, new_data2_size;
+ ElfW(Off) new_data2_offset;
+ ElfW(Addr) new_data2_addr;
- int n, nn, old_bss_index, old_data_index;
- int old_mdebug_index, old_sbss_index;
+ int n, nn;
+ int old_bss_index, old_sbss_index;
+ int old_data_index, new_data2_index;
+ int old_mdebug_index;
struct stat stat_buf;
- /* Open the old file & map it into the address space. */
+ /* Open the old file & map it into the address space. */
old_file = open (old_name, O_RDONLY);
fatal ("Can't open %s for reading: errno %d\n", old_name, errno);
if (fstat (old_file, &stat_buf) == -1)
- fatal ("Can't fstat(%s): errno %d\n", old_name, errno);
+ fatal ("Can't fstat (%s): errno %d\n", old_name, errno);
- old_base = mmap (0, stat_buf.st_size, PROT_READ, MAP_SHARED, old_file, 0);
+ old_base = (caddr_t) mmap ((caddr_t) 0, stat_buf.st_size,
+ PROT_READ, MAP_SHARED, old_file, 0);
if (old_base == (caddr_t) -1)
- fatal ("Can't mmap(%s): errno %d\n", old_name, errno);
+ fatal ("Can't mmap (%s): errno %d\n", old_name, errno);
#ifdef DEBUG
- fprintf (stderr, "mmap(%s, %x) -> %x\n", old_name, stat_buf.st_size,
+ fprintf (stderr, "mmap (%s, %x) -> %x\n", old_name, stat_buf.st_size,
old_base);
#endif
- /* Get pointers to headers & section names. */
+ /* Get pointers to headers & section names */
- old_file_h = (l_Elf_Ehdr *) old_base;
- old_program_h = (l_Elf_Phdr *) ((byte *) old_base + old_file_h->e_phoff);
- old_section_h = (l_Elf_Shdr *) ((byte *) old_base + old_file_h->e_shoff);
- old_section_names
- = (char *) old_base + OLD_SECTION_H (old_file_h->e_shstrndx).sh_offset;
+ old_file_h = (ElfW(Ehdr) *) old_base;
+ old_program_h = (ElfW(Phdr) *) ((byte *) old_base + old_file_h->e_phoff);
+ old_section_h = (ElfW(Shdr) *) ((byte *) old_base + old_file_h->e_shoff);
+ old_section_names = (char *) old_base
+ + OLD_SECTION_H (old_file_h->e_shstrndx).sh_offset;
/* Find the mdebug section, if any. */
old_mdebug_index = find_section (".mdebug", old_section_names,
old_name, old_file_h, old_section_h, 1);
- /* Find the .sbss section, if any. */
+ /* Find the old .bss section. Figure out parameters of the new
+ * data2 and bss sections.
+ */
+
+ old_bss_index = find_section (".bss", old_section_names,
+ old_name, old_file_h, old_section_h, 0);
old_sbss_index = find_section (".sbss", old_section_names,
old_name, old_file_h, old_section_h, 1);
+ if (old_sbss_index != -1)
+ if (OLD_SECTION_H (old_sbss_index).sh_type == SHT_PROGBITS)
+ old_sbss_index = -1;
- if (old_sbss_index != -1 && (OLD_SECTION_H (old_sbss_index).sh_type == SHT_PROGBITS))
- old_sbss_index = -1;
-
- /* Find the old .bss section. */
-
- old_bss_index = find_section (".bss", old_section_names,
- old_name, old_file_h, old_section_h, 0);
+ if (old_sbss_index == -1)
+ {
+ old_bss_addr = OLD_SECTION_H (old_bss_index).sh_addr;
+ old_bss_size = OLD_SECTION_H (old_bss_index).sh_size;
+ new_data2_index = old_bss_index;
+ }
+ else
+ {
+ old_bss_addr = OLD_SECTION_H (old_sbss_index).sh_addr;
+ old_bss_size = OLD_SECTION_H (old_bss_index).sh_size
+ + OLD_SECTION_H (old_sbss_index).sh_size;
+ new_data2_index = old_sbss_index;
+ }
/* Find the old .data section. Figure out parameters of
the new data2 and bss sections. */
old_data_index = find_section (".data", old_section_names,
old_name, old_file_h, old_section_h, 0);
- old_bss_addr = OLD_SECTION_H (old_bss_index).sh_addr;
- old_bss_size = OLD_SECTION_H (old_bss_index).sh_size;
- old_base_addr = old_sbss_index == -1 ? old_bss_addr : OLD_SECTION_H (old_sbss_index).sh_addr;
-#if defined(emacs) || !defined(DEBUG)
- bss_end = (uintptr_t) sbrk (0);
- new_bss_addr = (l_Elf_Addr) bss_end;
+#if defined (emacs) || !defined (DEBUG)
+ new_bss_addr = (ElfW(Addr)) sbrk (0);
#else
- new_bss_addr = old_bss_addr + old_bss_size + 0x1234;
+ new_bss_addr = old_bss_addr + old_bss_size + 0x1234;
#endif
- new_data2_addr = old_bss_addr;
- new_data2_size = new_bss_addr - old_bss_addr;
+ new_data2_addr = old_bss_addr;
+ new_data2_size = new_bss_addr - old_bss_addr;
new_data2_offset = OLD_SECTION_H (old_data_index).sh_offset +
(new_data2_addr - OLD_SECTION_H (old_data_index).sh_addr);
- new_base_offset = OLD_SECTION_H (old_data_index).sh_offset +
- (old_base_addr - OLD_SECTION_H (old_data_index).sh_addr);
- new_offsets_shift = new_bss_addr -
- ((old_base_addr & ~0xfff) + ((old_base_addr & 0xfff) ? 0x1000 : 0));
#ifdef DEBUG
fprintf (stderr, "old_bss_index %d\n", old_bss_index);
fprintf (stderr, "old_bss_addr %x\n", old_bss_addr);
fprintf (stderr, "old_bss_size %x\n", old_bss_size);
- fprintf (stderr, "old_base_addr %x\n", old_base_addr);
fprintf (stderr, "new_bss_addr %x\n", new_bss_addr);
fprintf (stderr, "new_data2_addr %x\n", new_data2_addr);
fprintf (stderr, "new_data2_size %x\n", new_data2_size);
fprintf (stderr, "new_data2_offset %x\n", new_data2_offset);
- fprintf (stderr, "new_offsets_shift %x\n", new_offsets_shift);
#endif
if ((unsigned) new_bss_addr < (unsigned) old_bss_addr + old_bss_size)
- fatal (".bss shrank when undumping???\n");
+ fatal (".bss shrank when undumping???\n", 0, 0);
/* Set the output file to the right size and mmap it. Set
- pointers to various interesting objects. stat_buf still has
- old_file data. */
+ * pointers to various interesting objects. stat_buf still has
+ * old_file data.
+ */
new_file = open (new_name, O_RDWR | O_CREAT, 0666);
if (new_file < 0)
fatal ("Can't creat (%s): errno %d\n", new_name, errno);
- new_file_size = stat_buf.st_size /* old file size */
- + old_file_h->e_shentsize /* one new section header */
- + new_offsets_shift; /* trailing section shift */
+ new_file_size = stat_buf.st_size + old_file_h->e_shentsize + new_data2_size;
if (ftruncate (new_file, new_file_size))
fatal ("Can't ftruncate (%s): errno %d\n", new_name, errno);
- new_base = mmap (0, new_file_size, PROT_READ | PROT_WRITE, MAP_SHARED,
- new_file, 0);
+#ifdef UNEXEC_USE_MAP_PRIVATE
+ new_base = (caddr_t) mmap ((caddr_t) 0, new_file_size,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE, new_file, 0);
+#else
+ new_base = (caddr_t) mmap ((caddr_t) 0, new_file_size,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED, new_file, 0);
+#endif
if (new_base == (caddr_t) -1)
fatal ("Can't mmap (%s): errno %d\n", new_name, errno);
- new_file_h = (l_Elf_Ehdr *) new_base;
- new_program_h = (l_Elf_Phdr *) ((byte *) new_base + old_file_h->e_phoff);
- new_section_h
- = (l_Elf_Shdr *) ((byte *) new_base + old_file_h->e_shoff
- + new_offsets_shift);
+ new_file_h = (ElfW(Ehdr) *) new_base;
+ new_program_h = (ElfW(Phdr) *) ((byte *) new_base + old_file_h->e_phoff);
+ new_section_h = (ElfW(Shdr) *)
+ ((byte *) new_base + old_file_h->e_shoff + new_data2_size);
/* Make our new file, program and section headers as copies of the
- originals. */
+ * originals.
+ */
memcpy (new_file_h, old_file_h, old_file_h->e_ehsize);
memcpy (new_program_h, old_program_h,
PATCH_INDEX (new_file_h->e_shstrndx);
/* Fix up file header. We'll add one section. Section header is
- further away now. */
+ * further away now.
+ */
- new_file_h->e_shoff += new_offsets_shift;
+ new_file_h->e_shoff += new_data2_size;
new_file_h->e_shnum += 1;
-
#ifdef DEBUG
fprintf (stderr, "Old section offset %x\n", old_file_h->e_shoff);
fprintf (stderr, "Old section count %d\n", old_file_h->e_shnum);
#endif
/* Fix up a new program header. Extend the writable data segment so
- that the bss area is covered too. Find that segment by looking
- for a segment that ends just before the .bss area. Make sure
- that no segments are above the new .data2. Put a loop at the end
- to adjust the offset and address of any segment that is above
- data2, just in case we decide to allow this later. */
+ * that the bss area is covered too. Find that segment by looking
+ * for a segment that ends just before the .bss area. Make sure
+ * that no segments are above the new .data2. Put a loop at the end
+ * to adjust the offset and address of any segment that is above
+ * data2, just in case we decide to allow this later.
+ */
for (n = new_file_h->e_phnum - 1; n >= 0; n--)
{
/* Compute maximum of all requirements for alignment of section. */
- int alignment = (NEW_PROGRAM_H (n)).p_align;
+ ElfW(Word) alignment = (NEW_PROGRAM_H (n)).p_align;
if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment)
alignment = OLD_SECTION_H (old_bss_index).sh_addralign;
- /* Supposedly this condition is okay for the SGI. */
-#if 0
- if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz > old_base_addr)
- fatal ("Program segment above .bss in %s\n", old_name);
-#endif
+#ifdef __sgi
+ /* According to r02kar@x4u2.desy.de (Karsten Kuenne)
+ and oliva@gnu.org (Alexandre Oliva), on IRIX 5.2, we
+ always get "Program segment above .bss" when dumping
+ when the executable doesn't have an sbss section. */
+ if (old_sbss_index != -1)
+#endif /* __sgi */
+ if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz
+ > (old_sbss_index == -1
+ ? old_bss_addr
+ : round_up (old_bss_addr, alignment)))
+ fatal ("Program segment above .bss in %s\n", old_name, 0);
if (NEW_PROGRAM_H (n).p_type == PT_LOAD
&& (round_up ((NEW_PROGRAM_H (n)).p_vaddr
+ (NEW_PROGRAM_H (n)).p_filesz,
alignment)
- == round_up (old_base_addr, alignment)))
+ == round_up (old_bss_addr, alignment)))
break;
}
if (n < 0)
- fatal ("Couldn't find segment next to %s in %s\n",
- old_sbss_index == -1 ? ".sbss" : ".bss", old_name);
+ fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0);
- NEW_PROGRAM_H (n).p_filesz += new_offsets_shift;
+ /* Make sure that the size includes any padding before the old .bss
+ section. */
+ NEW_PROGRAM_H (n).p_filesz = new_bss_addr - NEW_PROGRAM_H (n).p_vaddr;
NEW_PROGRAM_H (n).p_memsz = NEW_PROGRAM_H (n).p_filesz;
-#if 1 /* Maybe allow section after data2 - does this ever happen? */
+#if 0 /* Maybe allow section after data2 - does this ever happen? */
for (n = new_file_h->e_phnum - 1; n >= 0; n--)
{
if (NEW_PROGRAM_H (n).p_vaddr
&& NEW_PROGRAM_H (n).p_vaddr >= new_data2_addr)
- NEW_PROGRAM_H (n).p_vaddr += new_offsets_shift - old_bss_size;
+ NEW_PROGRAM_H (n).p_vaddr += new_data2_size - old_bss_size;
if (NEW_PROGRAM_H (n).p_offset >= new_data2_offset)
- NEW_PROGRAM_H (n).p_offset += new_offsets_shift;
+ NEW_PROGRAM_H (n).p_offset += new_data2_size;
}
#endif
/* Fix up section headers based on new .data2 section. Any section
- whose offset or virtual address is after the new .data2 section
- gets its value adjusted. .bss size becomes zero and new address
- is set. data2 section header gets added by copying the existing
- .data header and modifying the offset, address and size. */
- for (old_data_index = 1; old_data_index < old_file_h->e_shnum;
+ * whose offset or virtual address is after the new .data2 section
+ * gets its value adjusted. .bss size becomes zero and new address
+ * is set. data2 section header gets added by copying the existing
+ * .data header and modifying the offset, address and size.
+ */
+ for (old_data_index = 1; old_data_index < (int) old_file_h->e_shnum;
old_data_index++)
if (!strcmp (old_section_names + OLD_SECTION_H (old_data_index).sh_name,
".data"))
break;
if (old_data_index == old_file_h->e_shnum)
- fatal ("Can't find .data in %s.\n", old_name);
+ fatal ("Can't find .data in %s.\n", old_name, 0);
- /* Walk through all section headers, insert the new data2 section right
- before the new bss section. */
- for (n = 1, nn = 1; n < old_file_h->e_shnum; n++, nn++)
+ /* Walk through all section headers, insert the new data2 section right
+ before the new bss section. */
+ for (n = 1, nn = 1; n < (int) old_file_h->e_shnum; n++, nn++)
{
caddr_t src;
-
- /* XEmacs change: */
- if (n < old_bss_index)
- {
- memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
- old_file_h->e_shentsize);
-
- }
- else if (n == old_bss_index)
+ /* If it is (s)bss section, insert the new data2 section before it. */
+ /* new_data2_index is the index of either old_sbss or old_bss, that was
+ chosen as a section for new_data2. */
+ if (n == new_data2_index)
{
-
- /* If it is bss section, insert the new data2 section before it. */
- /* Steal the data section header for this data2 section. */
+ /* Steal the data section header for this data2 section. */
memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (old_data_index),
new_file_h->e_shentsize);
-
+
NEW_SECTION_H (nn).sh_addr = new_data2_addr;
NEW_SECTION_H (nn).sh_offset = new_data2_offset;
NEW_SECTION_H (nn).sh_size = new_data2_size;
/* Use the bss section's alignment. This will assure that the
new data2 section always be placed in the same spot as the old
- bss section by any other application. */
+ bss section by any other application. */
NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (n).sh_addralign;
- /* Now copy over what we have in the memory now. */
- memcpy (NEW_SECTION_H (nn).sh_offset + new_base,
- (caddr_t) OLD_SECTION_H (n).sh_addr,
+ /* Now copy over what we have in the memory now. */
+ memcpy (NEW_SECTION_H (nn).sh_offset + new_base,
+ (caddr_t) OLD_SECTION_H (n).sh_addr,
new_data2_size);
nn++;
- memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
- old_file_h->e_shentsize);
-
- /* The new bss section's size is zero, and its file offset and virtual
- address should be off by NEW_OFFSETS_SHIFT. */
- NEW_SECTION_H (nn).sh_offset += new_offsets_shift;
- NEW_SECTION_H (nn).sh_addr = new_bss_addr;
+ }
+
+ memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
+ old_file_h->e_shentsize);
+
+ if (n == old_bss_index
+ /* The new bss and sbss section's size is zero, and its file offset
+ and virtual address should be off by NEW_DATA2_SIZE. */
+ || n == old_sbss_index
+ )
+ {
+ /* NN should be `old_s?bss_index + 1' at this point. */
+ NEW_SECTION_H (nn).sh_offset =
+ NEW_SECTION_H (new_data2_index).sh_offset + new_data2_size;
+ NEW_SECTION_H (nn).sh_addr =
+ NEW_SECTION_H (new_data2_index).sh_addr + new_data2_size;
/* Let the new bss section address alignment be the same as the
- section address alignment followed the old bss section, so
- this section will be placed in exactly the same place. */
- NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (n).sh_addralign;
+ section address alignment followed the old bss section, so
+ this section will be placed in exactly the same place. */
+ NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (nn).sh_addralign;
NEW_SECTION_H (nn).sh_size = 0;
}
- else /* n > old_bss_index */
- memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
- old_file_h->e_shentsize);
-
- /* Any section that was original placed AFTER the bss
- section must now be adjusted by NEW_OFFSETS_SHIFT. */
-
- if (NEW_SECTION_H (nn).sh_offset >= new_base_offset)
- NEW_SECTION_H (nn).sh_offset += new_offsets_shift;
-
+ else
+ {
+ /* Any section that was original placed AFTER the bss
+ section should now be off by NEW_DATA2_SIZE. */
+#ifdef SOLARIS_POWERPC
+ /* On PPC Reference Platform running Solaris 2.5.1
+ the plt section is also of type NOBI like the bss section.
+ (not really stored) and therefore sections after the bss
+ section start at the plt offset. The plt section is always
+ the one just before the bss section.
+ It would be better to put the new data section before
+ the .plt section, or use libelf instead.
+ Erik Deumens, deumens@qtp.ufl.edu. */
+ if (NEW_SECTION_H (nn).sh_offset
+ >= OLD_SECTION_H (old_bss_index-1).sh_offset)
+ NEW_SECTION_H (nn).sh_offset += new_data2_size;
+#else
+ if (round_up (NEW_SECTION_H (nn).sh_offset,
+ OLD_SECTION_H (old_bss_index).sh_addralign)
+ >= new_data2_offset)
+ NEW_SECTION_H (nn).sh_offset += new_data2_size;
+#endif
+ /* Any section that was originally placed after the section
+ header table should now be off by the size of one section
+ header table entry. */
+ if (NEW_SECTION_H (nn).sh_offset > new_file_h->e_shoff)
+ NEW_SECTION_H (nn).sh_offset += new_file_h->e_shentsize;
+ }
+
/* If any section hdr refers to the section after the new .data
- section, make it refer to next one because we have inserted
+ section, make it refer to next one because we have inserted
a new section in between. */
-
+
PATCH_INDEX (NEW_SECTION_H (nn).sh_link);
/* For symbol tables, info is a symbol table index,
so don't change it. */
if (NEW_SECTION_H (nn).sh_type != SHT_SYMTAB
&& NEW_SECTION_H (nn).sh_type != SHT_DYNSYM)
PATCH_INDEX (NEW_SECTION_H (nn).sh_info);
-
- /* Fix the type and alignment for the .sbss section */
- if ((old_sbss_index != -1) && !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".sbss"))
- {
- NEW_SECTION_H (nn).sh_type = SHT_PROGBITS;
- NEW_SECTION_H (nn).sh_offset = round_up (NEW_SECTION_H (nn).sh_offset,
- NEW_SECTION_H (nn).sh_addralign);
- }
- /* Now, start to copy the content of sections. */
+ if (old_sbss_index != -1)
+ if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".sbss"))
+ {
+ NEW_SECTION_H (nn).sh_offset =
+ round_up (NEW_SECTION_H (nn).sh_offset,
+ NEW_SECTION_H (nn).sh_addralign);
+ NEW_SECTION_H (nn).sh_type = SHT_PROGBITS;
+ }
+
+ /* Now, start to copy the content of sections. */
if (NEW_SECTION_H (nn).sh_type == SHT_NULL
|| NEW_SECTION_H (nn).sh_type == SHT_NOBITS)
continue;
-
- /* Write out the sections. .data, .data1 and .sbss (and data2, called
+
+ /* Write out the sections. .data and .data1 (and data2, called
".data" in the strings table) get copied from the current process
instead of the old file. */
- if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data")
- || !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data1")
- || !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".got")
- || !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".sbss"))
+ if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data")
+ || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
+ ".sdata")
+ || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
+ ".lit4")
+ || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
+ ".lit8")
+ || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
+ ".sdata1")
+ || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
+ ".data1")
+ || !strcmp (old_section_names + NEW_SECTION_H (nn).sh_name,
+ ".sbss"))
src = (caddr_t) OLD_SECTION_H (n).sh_addr;
else
src = old_base + OLD_SECTION_H (n).sh_offset;
-
+
memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src,
NEW_SECTION_H (nn).sh_size);
- /* Adjust the HDRR offsets in .mdebug and copy the
+#ifdef __alpha__
+ /* Update Alpha COFF symbol table: */
+ if (strcmp (old_section_names + OLD_SECTION_H (n).sh_name, ".mdebug")
+ == 0)
+ {
+ pHDRR symhdr = (pHDRR) (NEW_SECTION_H (nn).sh_offset + new_base);
+
+ symhdr->cbLineOffset += new_data2_size;
+ symhdr->cbDnOffset += new_data2_size;
+ symhdr->cbPdOffset += new_data2_size;
+ symhdr->cbSymOffset += new_data2_size;
+ symhdr->cbOptOffset += new_data2_size;
+ symhdr->cbAuxOffset += new_data2_size;
+ symhdr->cbSsOffset += new_data2_size;
+ symhdr->cbSsExtOffset += new_data2_size;
+ symhdr->cbFdOffset += new_data2_size;
+ symhdr->cbRfdOffset += new_data2_size;
+ symhdr->cbExtOffset += new_data2_size;
+ }
+#endif /* __alpha__ */
+
+#if defined (__sony_news) && defined (_SYSTYPE_SYSV)
+ if (NEW_SECTION_H (nn).sh_type == SHT_MIPS_DEBUG
+ && old_mdebug_index != -1)
+ {
+ int diff = NEW_SECTION_H(nn).sh_offset
+ - OLD_SECTION_H(old_mdebug_index).sh_offset;
+ HDRR *phdr = (HDRR *)(NEW_SECTION_H (nn).sh_offset + new_base);
+
+ if (diff)
+ {
+ phdr->cbLineOffset += diff;
+ phdr->cbDnOffset += diff;
+ phdr->cbPdOffset += diff;
+ phdr->cbSymOffset += diff;
+ phdr->cbOptOffset += diff;
+ phdr->cbAuxOffset += diff;
+ phdr->cbSsOffset += diff;
+ phdr->cbSsExtOffset += diff;
+ phdr->cbFdOffset += diff;
+ phdr->cbRfdOffset += diff;
+ phdr->cbExtOffset += diff;
+ }
+ }
+#endif /* __sony_news && _SYSTYPE_SYSV */
+
+#if __sgi
+ /* Adjust the HDRR offsets in .mdebug and copy the
line data if it's in its usual 'hole' in the object.
Makes the new file debuggable with dbx.
patches up two problems: the absolute file offsets
HDRR * o_phdrr = (HDRR *)((byte *)old_base + OLD_SECTION_H (n).sh_offset);
HDRR * n_phdrr = (HDRR *)((byte *)new_base + NEW_SECTION_H (nn).sh_offset);
- unsigned movement = new_offsets_shift;
+ unsigned movement = new_data2_size;
MDEBUGADJUST (idnMax, cbDnOffset);
MDEBUGADJUST (ipdMax, cbPdOffset);
}
}
}
+#endif /* __sgi */
- /* If it is the symbol table, its st_shndx field needs to be patched. */
+ /* If it is the symbol table, its st_shndx field needs to be patched. */
if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB
|| NEW_SECTION_H (nn).sh_type == SHT_DYNSYM)
{
- l_Elf_Shdr *spt = &NEW_SECTION_H (nn);
+ ElfW(Shdr) *spt = &NEW_SECTION_H (nn);
unsigned int num = spt->sh_size / spt->sh_entsize;
- l_Elf_Sym * sym = (l_Elf_Sym *) (NEW_SECTION_H (nn).sh_offset
- + new_base);
+ ElfW(Sym) * sym = (ElfW(Sym) *) (NEW_SECTION_H (nn).sh_offset +
+ new_base);
for (; num--; sym++)
{
- if (sym->st_shndx == SHN_UNDEF
- || sym->st_shndx == SHN_ABS
- || sym->st_shndx == SHN_COMMON)
+ if ((sym->st_shndx == SHN_UNDEF)
+ || (sym->st_shndx == SHN_ABS)
+ || (sym->st_shndx == SHN_COMMON))
continue;
-
+
PATCH_INDEX (sym->st_shndx);
}
}
}
+ /* Update the symbol values of _edata and _end. */
+ for (n = new_file_h->e_shnum - 1; n; n--)
+ {
+ byte *symnames;
+ ElfW(Sym) *symp, *symendp;
+
+ if (NEW_SECTION_H (n).sh_type != SHT_DYNSYM
+ && NEW_SECTION_H (n).sh_type != SHT_SYMTAB)
+ continue;
+
+ symnames = ((byte *) new_base
+ + NEW_SECTION_H (NEW_SECTION_H (n).sh_link).sh_offset);
+ symp = (ElfW(Sym) *) (NEW_SECTION_H (n).sh_offset + new_base);
+ symendp = (ElfW(Sym) *) ((byte *)symp + NEW_SECTION_H (n).sh_size);
+
+ for (; symp < symendp; symp ++)
+ if (strcmp ((char *) (symnames + symp->st_name), "_end") == 0
+ || strcmp ((char *) (symnames + symp->st_name), "end") == 0
+ || strcmp ((char *) (symnames + symp->st_name), "_edata") == 0
+ || strcmp ((char *) (symnames + symp->st_name), "edata") == 0)
+ memcpy (&symp->st_value, &new_bss_addr, sizeof (new_bss_addr));
+ }
+
+ /* This loop seeks out relocation sections for the data section, so
+ that it can undo relocations performed by the runtime linker. */
+ for (n = new_file_h->e_shnum - 1; n; n--)
+ {
+ ElfW(Shdr) section = NEW_SECTION_H (n);
+ switch (section.sh_type) {
+ default:
+ break;
+ case SHT_REL:
+ case SHT_RELA:
+ /* This code handles two different size structs, but there should
+ be no harm in that provided that r_offset is always the first
+ member. */
+ nn = section.sh_info;
+ if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data")
+ || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
+ ".sdata")
+ || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
+ ".lit4")
+ || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
+ ".lit8")
+ || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
+ ".sdata1")
+ || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
+ ".data1"))
+ {
+ ElfW(Addr) offset = NEW_SECTION_H (nn).sh_addr -
+ NEW_SECTION_H (nn).sh_offset;
+ caddr_t reloc = old_base + section.sh_offset, end;
+ for (end = reloc + section.sh_size; reloc < end;
+ reloc += section.sh_entsize)
+ {
+ ElfW(Addr) addr = ((ElfW(Rel) *) reloc)->r_offset - offset;
+#ifdef __alpha__
+ /* The Alpha ELF binutils currently have a bug that
+ sometimes results in relocs that contain all
+ zeroes. Work around this for now... */
+ if (((ElfW(Rel) *) reloc)->r_offset == 0)
+ continue;
+#endif
+ memcpy (new_base + addr, old_base + addr, sizeof(ElfW(Addr)));
+ }
+ }
+ break;
+ }
+ }
+
+#ifdef UNEXEC_USE_MAP_PRIVATE
+ if (lseek (new_file, 0, SEEK_SET) == -1)
+ fatal ("Can't rewind (%s): errno %d\n", new_name, errno);
+
+ if (write (new_file, new_base, new_file_size) != new_file_size)
+ fatal ("Can't write (%s): errno %d\n", new_name, errno);
+#endif
+
/* Close the files and make the new file executable. */
if (close (old_file))
stat_buf.st_mode |= 0111 & ~n;
if (chmod (new_name, stat_buf.st_mode) == -1)
fatal ("Can't chmod (%s): errno %d\n", new_name, errno);
-
- return 0;
}
projects / chise / xemacs-chise.git.1 / blobdiff