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
*/
\f
if (old_data_index == old_file_h->e_shnum)
fatal ("Can't find .data in %s.\n", old_name, 0);
- /* Walk through all section headers, insert the new data2 section right
+ /* 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++)
{
/* 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;
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,
+ 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),
+
+ 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_DATA2_SIZE. */
if (n == old_bss_index)
NEW_SECTION_H (nn).sh_offset += new_data2_size;
NEW_SECTION_H (nn).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
+ 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;
}
/* 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_NULL
|| NEW_SECTION_H (nn).sh_type == SHT_NOBITS)
continue;
-
+
/* 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. */
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);
{
Elf32_Shdr *spt = &NEW_SECTION_H (nn);
unsigned int num = spt->sh_size / spt->sh_entsize;
- Elf32_Sym * sym = (Elf32_Sym *) (NEW_SECTION_H (nn).sh_offset +
+ Elf32_Sym * sym = (Elf32_Sym *) (NEW_SECTION_H (nn).sh_offset +
new_base);
for (; num--; sym++)
{
|| (sym->st_shndx == SHN_ABS)
|| (sym->st_shndx == SHN_COMMON))
continue;
-
+
PATCH_INDEX (sym->st_shndx);
}
}
memcpy (&symp->st_value, &new_bss_addr, sizeof (new_bss_addr));
}
-#ifdef SOLARIS2
/* 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--)
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. */
+ /* 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),
break;
}
}
-#endif
#ifdef UNEXEC_USE_MAP_PRIVATE
if (lseek (new_file, 0, SEEK_SET) == -1)