-/* Copyright (C) 1985-1988, 1990, 1992, 1999-2015 Free Software
+/* Copyright (C) 1985-1988, 1990, 1992, 1999-2016 Free Software
Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
* On some machines, an existing old_name file is required.
*
*/
-
-/* Even more heavily modified by james@bigtex.cactus.org of Dell Computer Co.
- * ELF support added.
- *
- * Basic theory: the data space of the running process needs to be
- * dumped to the output file. Normally we would just enlarge the size
- * of .data, scooting everything down. But we can't do that in ELF,
- * because there is often something between the .data space and the
- * .bss space.
- *
- * In the temacs dump below, notice that the Global Offset Table
- * (.got) and the Dynamic link data (.dynamic) come between .data1 and
- * .bss. It does not work to overlap .data with these fields.
- *
- * The solution is to create a new .data segment. This segment is
- * filled with data from the current process. Since the contents of
- * various sections refer to sections by index, the new .data segment
- * is made the last in the table to avoid changing any existing index.
-
- * This is an example of how the section headers are changed. "Addr"
- * is a process virtual address. "Offset" is a file offset.
-
-raid:/nfs/raid/src/dist-18.56/src> dump -h temacs
-
-temacs:
-
- **** SECTION HEADER TABLE ****
- [No] Type Flags Addr Offset Size Name
- Link Info Adralgn Entsize
-
- [1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
-
- [2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
-
- [3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
-
- [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
-
- [5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
-
- [6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
-
- [7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
-
- [8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
-
- [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
-
- [10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
-
- [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
-
- [12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
-
- [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
-
- [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
-
- [15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
-
- [16] 8 3 0x80a98f4 0x608f4 0x449c .bss
- 0 0 0x4 0
-
- [17] 2 0 0 0x608f4 0x9b90 .symtab
- 18 371 0x4 0x10
-
- [18] 3 0 0 0x6a484 0x8526 .strtab
- 0 0 0x1 0
-
- [19] 3 0 0 0x729aa 0x93 .shstrtab
- 0 0 0x1 0
-
- [20] 1 0 0 0x72a3d 0x68b7 .comment
- 0 0 0x1 0
-
- raid:/nfs/raid/src/dist-18.56/src> dump -h xemacs
-
- xemacs:
-
- **** SECTION HEADER TABLE ****
- [No] Type Flags Addr Offset Size Name
- Link Info Adralgn Entsize
-
- [1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
-
- [2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
-
- [3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
-
- [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
-
- [5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
-
- [6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
-
- [7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
-
- [8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
-
- [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
-
- [10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
-
- [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
-
- [12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
-
- [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
-
- [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
-
- [15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
-
- [16] 8 3 0x80c6800 0x7d800 0 .bss
- 0 0 0x4 0
-
- [17] 2 0 0 0x7d800 0x9b90 .symtab
- 18 371 0x4 0x10
-
- [18] 3 0 0 0x87390 0x8526 .strtab
- 0 0 0x1 0
-
- [19] 3 0 0 0x8f8b6 0x93 .shstrtab
- 0 0 0x1 0
-
- [20] 1 0 0 0x8f949 0x68b7 .comment
- 0 0 0x1 0
-
- [21] 1 3 0x80a98f4 0x608f4 0x1cf0c .data
- 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
- * after the new .data section, it is moved. "Shnum" is the number of
- * sections, which we increment.
- *
- * "Phoff" is the file offset to the program header. "Phentsize" and
- * "Shentsz" are the program and section header entries sizes respectively.
- * These can be larger than the apparent struct sizes.
-
- raid:/nfs/raid/src/dist-18.56/src> dump -f temacs
-
- temacs:
-
- **** ELF HEADER ****
- Class Data Type Machine Version
- Entry Phoff Shoff Flags Ehsize
- Phentsize Phnum Shentsz Shnum Shstrndx
-
- 1 1 2 3 1
- 0x80499cc 0x34 0x792f4 0 0x34
- 0x20 5 0x28 21 19
-
- raid:/nfs/raid/src/dist-18.56/src> dump -f xemacs
-
- xemacs:
-
- **** ELF HEADER ****
- Class Data Type Machine Version
- Entry Phoff Shoff Flags Ehsize
- Phentsize Phnum Shentsz Shnum Shstrndx
-
- 1 1 2 3 1
- 0x80499cc 0x34 0x96200 0 0x34
- 0x20 5 0x28 22 19
-
- * These are the program headers. "Offset" is the file offset to the
- * segment. "Vaddr" is the memory load address. "Filesz" is the
- * segment size as it appears in the file, and "Memsz" is the size in
- * memory. Below, the third segment is the code and the fourth is the
- * data: the difference between Filesz and Memsz is .bss
-
- raid:/nfs/raid/src/dist-18.56/src> dump -o temacs
-
- temacs:
- ***** PROGRAM EXECUTION HEADER *****
- Type Offset Vaddr Paddr
- Filesz Memsz Flags Align
-
- 6 0x34 0x8048034 0
- 0xa0 0xa0 5 0
-
- 3 0xd4 0 0
- 0x13 0 4 0
-
- 1 0x34 0x8048034 0
- 0x3f2f9 0x3f2f9 5 0x1000
-
- 1 0x3f330 0x8088330 0
- 0x215c4 0x25a60 7 0x1000
-
- 2 0x60874 0x80a9874 0
- 0x80 0 7 0
-
- raid:/nfs/raid/src/dist-18.56/src> dump -o xemacs
-
- xemacs:
- ***** PROGRAM EXECUTION HEADER *****
- Type Offset Vaddr Paddr
- Filesz Memsz Flags Align
-
- 6 0x34 0x8048034 0
- 0xa0 0xa0 5 0
-
- 3 0xd4 0 0
- 0x13 0 4 0
-
- 1 0x34 0x8048034 0
- 0x3f2f9 0x3f2f9 5 0x1000
-
- 1 0x3f330 0x8088330 0
- 0x3e4d0 0x3e4d0 7 0x1000
-
- 2 0x60874 0x80a9874 0
- 0x80 0 7 0
-
-
- */
-\f
-/* 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
- * 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
- * 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
- * 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
- * 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.
- *
- * The above example now should look like:
-
- **** SECTION HEADER TABLE ****
- [No] Type Flags Addr Offset Size Name
- Link Info Adralgn Entsize
-
- [1] 1 2 0x80480d4 0xd4 0x13 .interp
- 0 0 0x1 0
-
- [2] 5 2 0x80480e8 0xe8 0x388 .hash
- 3 0 0x4 0x4
-
- [3] 11 2 0x8048470 0x470 0x7f0 .dynsym
- 4 1 0x4 0x10
-
- [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr
- 0 0 0x1 0
-
- [5] 9 2 0x8049010 0x1010 0x338 .rel.plt
- 3 7 0x4 0x8
-
- [6] 1 6 0x8049348 0x1348 0x3 .init
- 0 0 0x4 0
-
- [7] 1 6 0x804934c 0x134c 0x680 .plt
- 0 0 0x4 0x4
-
- [8] 1 6 0x80499cc 0x19cc 0x3c56f .text
- 0 0 0x4 0
-
- [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini
- 0 0 0x4 0
-
- [10] 1 2 0x8085f40 0x3df40 0x69c .rodata
- 0 0 0x4 0
-
- [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1
- 0 0 0x4 0
-
- [12] 1 3 0x8088330 0x3f330 0x20afc .data
- 0 0 0x4 0
-
- [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1
- 0 0 0x4 0
-
- [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got
- 0 0 0x4 0x4
-
- [15] 6 3 0x80a9874 0x60874 0x80 .dynamic
- 4 0 0x4 0x8
-
- [16] 1 3 0x80a98f4 0x608f4 0x1cf0c .data
- 0 0 0x4 0
-
- [17] 8 3 0x80c6800 0x7d800 0 .bss
- 0 0 0x4 0
-
- [18] 2 0 0 0x7d800 0x9b90 .symtab
- 19 371 0x4 0x10
-
- [19] 3 0 0 0x87390 0x8526 .strtab
- 0 0 0x1 0
-
- [20] 3 0 0 0x8f8b6 0x93 .shstrtab
- 0 0 0x1 0
-
- [21] 1 0 0 0x8f949 0x68b7 .comment
- 0 0 0x1 0
-
- */
\f
/* We do not use mmap because that fails with NFS.
Instead we read the whole file, modify it, and write it out. */
/* 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
- */
static void *
entry_address (void *section_h, ptrdiff_t idx, ptrdiff_t entsize)
(*(ElfW (Shdr) *) entry_address (old_section_h, n, old_file_h->e_shentsize))
#define NEW_SECTION_H(n) \
(*(ElfW (Shdr) *) entry_address (new_section_h, n, new_file_h->e_shentsize))
-#define NEW_PROGRAM_H(n) \
- (*(ElfW (Phdr) *) entry_address (new_program_h, n, new_file_h->e_phentsize))
+#define OLD_PROGRAM_H(n) \
+ (*(ElfW (Phdr) *) entry_address (old_program_h, n, old_file_h->e_phentsize))
-#define PATCH_INDEX(n) ((n) += old_bss_index <= (n))
typedef unsigned char byte;
-/* Round X up to a multiple of Y. */
-
-static ElfW (Addr)
-round_up (ElfW (Addr) x, ElfW (Addr) y)
-{
- ElfW (Addr) rem = x % y;
- if (rem == 0)
- return x;
- return x - rem + y;
-}
-
-/* Return the index of the section named NAME.
- SECTION_NAMES, FILE_NAME and FILE_H give information
- about the file we are looking in.
-
- If we don't find the section NAME, that is a fatal error
- if NOERROR is false; return -1 if NOERROR is true. */
-
-static ptrdiff_t
-find_section (const char *name, const char *section_names, const char *file_name,
- ElfW (Ehdr) *old_file_h, ElfW (Shdr) *old_section_h,
- bool noerror)
-{
- ptrdiff_t idx;
-
- for (idx = 1; idx < old_file_h->e_shnum; idx++)
- {
- char const *found_name = section_names + OLD_SECTION_H (idx).sh_name;
-#ifdef UNEXELF_DEBUG
- fprintf (stderr, "Looking for %s - found %s\n", name, found_name);
-#endif
- if (strcmp (name, found_name) == 0)
- return idx;
- }
-
- if (! noerror)
- fatal ("Can't find %s in %s", name, file_name);
- return -1;
-}
-
/* ****************************************************************
* unexec
*
* driving logic.
*
- * In ELF, this works by replacing the old .bss section with a new
- * .data section, and inserting an empty .bss immediately afterwards.
+ * In ELF, this works by replacing the old bss SHT_NOBITS section with
+ * a new, larger, SHT_PROGBITS section.
*
*/
void
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. */
- char *old_section_names;
+ /* Point to the section name table. */
+ char *old_section_names, *new_section_names;
+ ElfW (Phdr) *old_bss_seg, *new_bss_seg;
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;
- ElfW (Off) old_bss_offset;
- ElfW (Word) new_data2_incr;
-
- ptrdiff_t n, nn;
- ptrdiff_t old_bss_index, old_sbss_index, old_plt_index;
- ptrdiff_t old_data_index, new_data2_index;
-#if defined _SYSTYPE_SYSV || defined __sgi
- ptrdiff_t old_mdebug_index;
-#endif
+ ElfW (Word) old_bss_size, bss_size_growth, new_data2_size;
+ ElfW (Off) old_bss_offset, new_data2_offset;
+
+ ptrdiff_t n;
+ ptrdiff_t old_bss_index;
struct stat stat_buf;
off_t old_file_size;
old_section_names = (char *) old_base
+ OLD_SECTION_H (old_file_h->e_shstrndx).sh_offset;
- /* Find the mdebug section, if any. */
-
-#if defined _SYSTYPE_SYSV || defined __sgi
- old_mdebug_index = find_section (".mdebug", old_section_names,
- old_name, old_file_h, old_section_h, 1);
-#endif
-
- /* 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_NOBITS)
- old_sbss_index = -1;
-
- /* PowerPC64 has .plt in the BSS section. */
- old_plt_index = find_section (".plt", old_section_names,
- old_name, old_file_h, old_section_h, 1);
- if (old_plt_index != -1)
- if (OLD_SECTION_H (old_plt_index).sh_type != SHT_NOBITS)
- old_plt_index = -1;
-
- if (old_sbss_index == -1 && old_plt_index == -1)
- {
- old_bss_addr = OLD_SECTION_H (old_bss_index).sh_addr;
- old_bss_size = OLD_SECTION_H (old_bss_index).sh_size;
- old_bss_offset = OLD_SECTION_H (old_bss_index).sh_offset;
- new_data2_index = old_bss_index;
- }
- else if (old_plt_index != -1
- && (old_sbss_index == -1
- || (OLD_SECTION_H (old_sbss_index).sh_addr
- > OLD_SECTION_H (old_plt_index).sh_addr)))
+ /* Find the PT_LOAD header covering the highest address. This
+ segment will be where bss sections are located, past p_filesz. */
+ old_bss_seg = 0;
+ for (n = old_file_h->e_phnum; --n >= 0; )
{
- old_bss_addr = OLD_SECTION_H (old_plt_index).sh_addr;
- old_bss_size = OLD_SECTION_H (old_bss_index).sh_size
- + OLD_SECTION_H (old_plt_index).sh_size;
- if (old_sbss_index != -1)
- old_bss_size += OLD_SECTION_H (old_sbss_index).sh_size;
- old_bss_offset = OLD_SECTION_H (old_plt_index).sh_offset;
- new_data2_index = old_plt_index;
+ ElfW (Phdr) *seg = &OLD_PROGRAM_H (n);
+ if (seg->p_type == PT_LOAD
+ && (old_bss_seg == 0
+ || seg->p_vaddr > old_bss_seg->p_vaddr))
+ old_bss_seg = seg;
}
- else
+
+ /* Note that old_bss_addr may be lower than the first bss section
+ address, since the section may need aligning. */
+ old_bss_addr = old_bss_seg->p_vaddr + old_bss_seg->p_filesz;
+ old_bss_offset = old_bss_seg->p_offset + old_bss_seg->p_filesz;
+ old_bss_size = old_bss_seg->p_memsz - old_bss_seg->p_filesz;
+
+ /* Find the last bss style section in the bss segment range. */
+ old_bss_index = -1;
+ for (n = old_file_h->e_shnum; --n > 0; )
{
- 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;
- old_bss_offset = OLD_SECTION_H (old_sbss_index).sh_offset;
- new_data2_index = old_sbss_index;
+ ElfW (Shdr) *shdr = &OLD_SECTION_H (n);
+ if (shdr->sh_type == SHT_NOBITS
+ && shdr->sh_addr >= old_bss_addr
+ && shdr->sh_addr + shdr->sh_size <= old_bss_addr + old_bss_size
+ && (old_bss_index == -1
+ || OLD_SECTION_H (old_bss_index).sh_addr < shdr->sh_addr))
+ old_bss_index = n;
}
- /* 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);
+ if (old_bss_index == -1)
+ fatal ("no bss section found");
new_break = sbrk (0);
new_bss_addr = (ElfW (Addr)) new_break;
- 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);
- /* This is the amount by which the sections following the bss sections
- must be shifted in the image. It can differ from new_data2_size if
- the end of the old .data section (and thus the offset of the .bss
- section) was unaligned. */
- new_data2_incr = new_data2_size + (new_data2_offset - old_bss_offset);
+ bss_size_growth = new_bss_addr - old_bss_addr;
+ new_data2_size = bss_size_growth;
+ new_data2_size += alignof (ElfW (Shdr)) - 1;
+ new_data2_size -= new_data2_size % alignof (ElfW (Shdr));
+
+ new_data2_offset = old_bss_offset;
#ifdef UNEXELF_DEBUG
fprintf (stderr, "old_bss_index %td\n", old_bss_index);
DEBUG_LOG (old_bss_size);
DEBUG_LOG (old_bss_offset);
DEBUG_LOG (new_bss_addr);
- DEBUG_LOG (new_data2_addr);
DEBUG_LOG (new_data2_size);
DEBUG_LOG (new_data2_offset);
- DEBUG_LOG (new_data2_incr);
#endif
if (new_bss_addr < old_bss_addr + old_bss_size)
if (new_file < 0)
fatal ("Can't creat (%s): %s", new_name, strerror (errno));
- new_file_size = old_file_size + old_file_h->e_shentsize + new_data2_incr;
+ new_file_size = old_file_size + new_data2_size;
if (ftruncate (new_file, new_file_size))
fatal ("Can't ftruncate (%s): %s", new_name, strerror (errno));
if (new_base == MAP_FAILED)
fatal ("Can't allocate buffer for %s: %s", old_name, strerror (errno));
- 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_incr);
-
/* Make our new file, program and section headers as copies of the
originals. */
+ new_file_h = (ElfW (Ehdr) *) new_base;
memcpy (new_file_h, old_file_h, old_file_h->e_ehsize);
- memcpy (new_program_h, old_program_h,
- old_file_h->e_phnum * old_file_h->e_phentsize);
- /* Modify the e_shstrndx if necessary. */
- PATCH_INDEX (new_file_h->e_shstrndx);
+ /* Fix up file header. Section header is further away now. */
- /* Fix up file header. We'll add one section. Section header is
- further away now. */
+ if (new_file_h->e_shoff >= old_bss_offset)
+ new_file_h->e_shoff += new_data2_size;
- new_file_h->e_shoff += new_data2_incr;
- new_file_h->e_shnum += 1;
+ new_program_h = (ElfW (Phdr) *) ((byte *) new_base + new_file_h->e_phoff);
+ new_section_h = (ElfW (Shdr) *) ((byte *) new_base + new_file_h->e_shoff);
+
+ memcpy (new_program_h, old_program_h,
+ old_file_h->e_phnum * old_file_h->e_phentsize);
+ memcpy (new_section_h, old_section_h,
+ old_file_h->e_shnum * old_file_h->e_shentsize);
#ifdef UNEXELF_DEBUG
DEBUG_LOG (old_file_h->e_shoff);
fprintf (stderr, "New section count %td\n", (ptrdiff_t) new_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. */
-
- for (n = new_file_h->e_phnum; --n >= 0; )
- {
- /* Compute maximum of all requirements for alignment of section. */
- 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;
-
-#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", old_name);
-
- 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_bss_addr, alignment)))
- break;
- }
- if (n < 0)
- fatal ("Couldn't find segment next to .bss in %s", old_name);
-
- /* 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 0 /* Maybe allow section after data2 - does this ever happen? */
- for (n = new_file_h->e_phnum; --n >= 0; )
- {
- if (NEW_PROGRAM_H (n).p_vaddr
- && NEW_PROGRAM_H (n).p_vaddr >= new_data2_addr)
- NEW_PROGRAM_H (n).p_vaddr += new_data2_size - old_bss_size;
+ /* Fix up program header. Extend the writable data segment so
+ that the bss area is covered too. */
- if (NEW_PROGRAM_H (n).p_offset >= new_data2_offset)
- NEW_PROGRAM_H (n).p_offset += new_data2_incr;
- }
-#endif
+ new_bss_seg = new_program_h + (old_bss_seg - old_program_h);
+ new_bss_seg->p_filesz = new_bss_addr - new_bss_seg->p_vaddr;
+ new_bss_seg->p_memsz = new_bss_seg->p_filesz;
- /* 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. */
+ /* Copy over what we have in memory now for the bss area. */
+ memcpy (new_base + new_data2_offset, (caddr_t) old_bss_addr,
+ bss_size_growth);
- /* 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, copying data and updating. */
+ for (n = 1; n < old_file_h->e_shnum; n++)
{
caddr_t src;
- /* 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)
- {
- /* 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. */
- 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,
- new_data2_size);
- nn++;
- }
-
- memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n),
- old_file_h->e_shentsize);
+ ElfW (Shdr) *old_shdr = &OLD_SECTION_H (n);
+ ElfW (Shdr) *new_shdr = &NEW_SECTION_H (n);
- 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 || n == old_plt_index
- )
- {
- /* NN should be `old_s?bss_index + 1' at this point. */
- NEW_SECTION_H (nn).sh_offset = new_data2_offset + new_data2_size;
- NEW_SECTION_H (nn).sh_addr = new_data2_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 (nn).sh_addralign;
- NEW_SECTION_H (nn).sh_size = 0;
- }
- else
+ if (new_shdr->sh_type == SHT_NOBITS
+ && new_shdr->sh_addr >= old_bss_addr
+ && (new_shdr->sh_addr + new_shdr->sh_size
+ <= old_bss_addr + old_bss_size))
{
- /* Any section that was originally placed after the .bss
- section should now be off by NEW_DATA2_INCR. If a
- section overlaps the .bss section, consider it to be
- placed after the .bss section. Overlap can occur if the
- section just before .bss has less-strict alignment; this
- was observed between .symtab and .bss on Solaris 2.5.1
- (sparc) with GCC snapshot 960602.
-
-> dump -h temacs
-
-temacs:
-
- **** SECTION HEADER TABLE ****
-[No] Type Flags Addr Offset Size Name
- Link Info Adralgn Entsize
-
-[22] 1 3 0x335150 0x315150 0x4 .data.rel.local
- 0 0 0x4 0
-
-[23] 8 3 0x335158 0x315158 0x42720 .bss
- 0 0 0x8 0
-
-[24] 2 0 0 0x315154 0x1c9d0 .symtab
- 25 1709 0x4 0x10
- */
-
- if (NEW_SECTION_H (nn).sh_offset >= old_bss_offset
- || (NEW_SECTION_H (nn).sh_offset + NEW_SECTION_H (nn).sh_size
- > new_data2_offset))
- NEW_SECTION_H (nn).sh_offset += new_data2_incr;
-
- /* 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;
+ /* This section now has file backing. */
+ new_shdr->sh_type = SHT_PROGBITS;
+
+ /* SHT_NOBITS sections do not need a valid sh_offset, so it
+ might be incorrect. Write the correct value. */
+ new_shdr->sh_offset = (new_shdr->sh_addr - new_bss_seg->p_vaddr
+ + new_bss_seg->p_offset);
+
+ /* If this is was a SHT_NOBITS .plt section, then it is
+ probably a PowerPC PLT. If it is PowerPC64 ELFv1 then
+ glibc ld.so doesn't initialize the toc pointer word. A
+ non-zero toc pointer word can defeat Power7 thread safety
+ during lazy update of a PLT entry. This only matters if
+ emacs becomes multi-threaded. */
+ if (strcmp (old_section_names + new_shdr->sh_name, ".plt") == 0)
+ memset (new_shdr->sh_offset + new_base, 0, new_shdr->sh_size);
+
+ /* Extend the size of the last bss section to cover dumped
+ data. */
+ if (n == old_bss_index)
+ new_shdr->sh_size = new_bss_addr - new_shdr->sh_addr;
+
+ /* We have already copied this section from the current
+ process. */
+ continue;
}
- /* If any section hdr refers to the section after the new .data
- 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);
-
- 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;
- }
+ /* Any section that was originally placed after the .bss
+ section should now be offset by NEW_DATA2_SIZE. */
+ if (new_shdr->sh_offset >= old_bss_offset)
+ new_shdr->sh_offset += new_data2_size;
/* 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)
+ if (new_shdr->sh_type == SHT_NULL
+ || new_shdr->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. */
- 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")
- /* The conditional bit below was in Oliva's original code
- (1999-08-25) and seems to have been dropped by mistake
- subsequently. It prevents a crash at startup under X in
- `IRIX64 6.5 6.5.17m', whether compiled on that release or
- an earlier one. It causes no trouble on the other ELF
- platforms I could test (Irix 6.5.15m, Solaris 8, Debian
- Potato x86, Debian Woody SPARC); however, it's reported
- to cause crashes under some version of GNU/Linux. It's
- not yet clear what's changed in that Irix version to
- cause the problem, or why the fix sometimes fails under
- GNU/Linux. There's probably no good reason to have
- something Irix-specific here, but this will have to do
- for now. IRIX6_5 is the most specific macro we have to
- test. -- fx 2002-10-01
-
- The issue _looks_ as though it's gone away on 6.5.18m,
- but maybe it's still lurking, to be triggered by some
- change in the binary. It appears to concern the dynamic
- loader, but I never got anywhere with an SGI support call
- seeking clues. -- fx 2002-11-29. */
-#ifdef IRIX6_5
- || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name),
- ".got")
-#endif
- || !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 (n).sh_name),
- ".sbss"))
- src = (caddr_t) OLD_SECTION_H (n).sh_addr;
+ /* Some sections are copied from the current process instead of
+ the old file. */
+ if (!strcmp (old_section_names + new_shdr->sh_name, ".data")
+ || !strcmp (old_section_names + new_shdr->sh_name, ".sdata")
+ || !strcmp (old_section_names + new_shdr->sh_name, ".lit4")
+ || !strcmp (old_section_names + new_shdr->sh_name, ".lit8")
+ || !strcmp (old_section_names + new_shdr->sh_name, ".sdata1")
+ || !strcmp (old_section_names + new_shdr->sh_name, ".data1"))
+ src = (caddr_t) old_shdr->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);
+ src = old_base + old_shdr->sh_offset;
-#if defined __alpha__ && !defined __OpenBSD__
- /* 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__ && !__OpenBSD__ */
+ memcpy (new_shdr->sh_offset + new_base, src, new_shdr->sh_size);
-#if defined (_SYSTYPE_SYSV)
- if (NEW_SECTION_H (nn).sh_type == SHT_MIPS_DEBUG
- && old_mdebug_index != -1)
+#if (defined __alpha__ && !defined __OpenBSD__) || defined _SYSTYPE_SYSV
+ /* Update Alpha and MIPS COFF debug symbol table. */
+ if (strcmp (old_section_names + new_shdr->sh_name, ".mdebug") == 0
+ && new_shdr->sh_offset - old_shdr->sh_offset != 0
+#if defined _SYSTYPE_SYSV
+ && new_shdr->sh_type == SHT_MIPS_DEBUG
+#endif
+ )
{
- ptrdiff_t new_offset = NEW_SECTION_H (nn).sh_offset;
- ptrdiff_t old_offset = OLD_SECTION_H (old_mdebug_index).sh_offset;
- ptrdiff_t diff = new_offset - old_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;
- }
+ ptrdiff_t diff = new_shdr->sh_offset - old_shdr->sh_offset;
+ HDRR *phdr = (HDRR *) (new_shdr->sh_offset + new_base);
+
+ 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 /* _SYSTYPE_SYSV */
+#endif /* __alpha__ || _SYSTYPE_SYSV */
#if __sgi
/* Adjust the HDRR offsets in .mdebug and copy the
the ld bug that gets the line table in a hole in the
elf file rather than in the .mdebug section proper.
David Anderson. davea@sgi.com Jan 16,1994. */
- if (n == old_mdebug_index)
+ if (strcmp (old_section_names + new_shdr->sh_name, ".mdebug") == 0
+ && new_shdr->sh_offset - old_shdr->sh_offset != 0)
{
#define MDEBUGADJUST(__ct,__fileaddr) \
if (n_phdrr->__ct > 0) \
n_phdrr->__fileaddr += movement; \
}
- 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_data2_size;
+ HDRR *o_phdrr = (HDRR *) ((byte *) old_base + old_shdr->sh_offset);
+ HDRR *n_phdrr = (HDRR *) ((byte *) new_base + new_shdr->sh_offset);
+ ptrdiff_t movement = new_shdr->sh_offset - old_shdr->sh_offset;
MDEBUGADJUST (idnMax, cbDnOffset);
MDEBUGADJUST (ipdMax, cbPdOffset);
requires special handling. */
if (n_phdrr->cbLine > 0)
{
- if (o_phdrr->cbLineOffset > (OLD_SECTION_H (n).sh_offset
- + OLD_SECTION_H (n).sh_size))
- {
- /* line data is in a hole in elf. do special copy and adjust
- for this ld mistake.
- */
- n_phdrr->cbLineOffset += movement;
+ n_phdrr->cbLineOffset += movement;
- memcpy (n_phdrr->cbLineOffset + new_base,
- o_phdrr->cbLineOffset + old_base, n_phdrr->cbLine);
- }
- else
- {
- /* somehow line data is in .mdebug as it is supposed to be. */
- MDEBUGADJUST (cbLine, cbLineOffset);
- }
+ if (o_phdrr->cbLineOffset > (old_shdr->sh_offset
+ + old_shdr->sh_size))
+ /* If not covered by section, it hasn't yet been copied. */
+ memcpy (n_phdrr->cbLineOffset + new_base,
+ o_phdrr->cbLineOffset + old_base, n_phdrr->cbLine);
}
}
#endif /* __sgi */
-
- /* 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)
- {
- ElfW (Shdr) *spt = &NEW_SECTION_H (nn);
- ptrdiff_t num = spt->sh_size / spt->sh_entsize;
- 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))
- continue;
-
- PATCH_INDEX (sym->st_shndx);
- }
- }
}
/* Update the symbol values of _edata and _end. */
{
byte *symnames;
ElfW (Sym) *symp, *symendp;
+ ElfW (Shdr) *sym_shdr = &NEW_SECTION_H (n);
- if (NEW_SECTION_H (n).sh_type != SHT_DYNSYM
- && NEW_SECTION_H (n).sh_type != SHT_SYMTAB)
+ if (sym_shdr->sh_type != SHT_DYNSYM
+ && sym_shdr->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);
+ + NEW_SECTION_H (sym_shdr->sh_link).sh_offset);
+ symp = (ElfW (Sym) *) (sym_shdr->sh_offset + new_base);
+ symendp = (ElfW (Sym) *) ((byte *) symp + sym_shdr->sh_size);
for (; symp < symendp; symp ++)
{
if (strncmp ((char *) (symnames + symp->st_name),
"_OBJC_", sizeof ("_OBJC_") - 1) == 0)
{
- caddr_t old, new;
-
- new = ((symp->st_value - NEW_SECTION_H (symp->st_shndx).sh_addr)
- + NEW_SECTION_H (symp->st_shndx).sh_offset + new_base);
- /* "Unpatch" index. */
- nn = symp->st_shndx;
- if (nn > old_bss_index)
- nn--;
- if (nn == old_bss_index)
- memset (new, 0, symp->st_size);
- else
+ ElfW (Shdr) *new_shdr = &NEW_SECTION_H (symp->st_shndx);
+ if (new_shdr->sh_type != SHT_NOBITS)
{
- old = ((symp->st_value
- - NEW_SECTION_H (symp->st_shndx).sh_addr)
- + OLD_SECTION_H (nn).sh_offset + old_base);
- memcpy (new, old, symp->st_size);
+ ElfW (Shdr) *old_shdr = &OLD_SECTION_H (symp->st_shndx);
+ ptrdiff_t reladdr = symp->st_value - new_shdr->sh_addr;
+ ptrdiff_t newoff = reladdr + new_shdr->sh_offset;
+
+ if (old_shdr->sh_type == SHT_NOBITS)
+ memset (new_base + newoff, 0, symp->st_size);
+ else
+ {
+ ptrdiff_t oldoff = reladdr + old_shdr->sh_offset;
+ memcpy (new_base + newoff, old_base + oldoff,
+ symp->st_size);
+ }
}
}
#endif
}
}
- /* This loop seeks out relocation sections for the data section, so
- that it can undo relocations performed by the runtime linker. */
+ /* Modify the names of sections we changed from SHT_NOBITS to
+ SHT_PROGBITS. This is really just cosmetic, but some tools that
+ (wrongly) operate on section names rather than types might be
+ confused by a SHT_PROGBITS .bss section. */
+ new_section_names = ((char *) new_base
+ + NEW_SECTION_H (new_file_h->e_shstrndx).sh_offset);
for (n = new_file_h->e_shnum; 0 < --n; )
{
- ElfW (Shdr) section = NEW_SECTION_H (n);
+ ElfW (Shdr) *old_shdr = &OLD_SECTION_H (n);
+ ElfW (Shdr) *new_shdr = &NEW_SECTION_H (n);
+
+ /* Replace the leading '.' with ','. When .shstrtab is string
+ merged this will rename both .bss and .rela.bss to ,bss and
+ .rela,bss. */
+ if (old_shdr->sh_type == SHT_NOBITS
+ && new_shdr->sh_type == SHT_PROGBITS)
+ *(new_section_names + new_shdr->sh_name) = ',';
+ }
- /* Cause a compilation error if anyone uses n instead of nn below. */
- #define n ((void) 0);
- n /* Prevent 'macro "n" is not used' warnings. */
+ /* This loop seeks out relocation sections for the data section, so
+ that it can undo relocations performed by the runtime loader. */
+ for (n = new_file_h->e_shnum; 0 < --n; )
+ {
+ ElfW (Shdr) *rel_shdr = &NEW_SECTION_H (n);
+ ElfW (Shdr) *shdr;
- switch (section.sh_type)
+ switch (rel_shdr->sh_type)
{
default:
break;
/* 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")
-#ifdef IRIX6_5 /* see above */
- || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
- ".got")
-#endif
- || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
- ".sdata1")
- || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name),
- ".data1"))
+ shdr = &NEW_SECTION_H (rel_shdr->sh_info);
+ if (!strcmp (old_section_names + shdr->sh_name, ".data")
+ || !strcmp (old_section_names + shdr->sh_name, ".sdata")
+ || !strcmp (old_section_names + shdr->sh_name, ".lit4")
+ || !strcmp (old_section_names + shdr->sh_name, ".lit8")
+ || !strcmp (old_section_names + shdr->sh_name, ".sdata1")
+ || !strcmp (old_section_names + shdr->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) offset = shdr->sh_addr - shdr->sh_offset;
+ caddr_t reloc = old_base + rel_shdr->sh_offset, end;
+ for (end = reloc + rel_shdr->sh_size;
+ reloc < end;
+ reloc += rel_shdr->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... */
+ /* Ignore R_*_NONE relocs. */
if (((ElfW (Rel) *) reloc)->r_offset == 0)
continue;
-#endif
- memcpy (new_base + addr, old_base + addr, sizeof (ElfW (Addr)));
+ /* Assume reloc applies to a word.
+ ??? This is not always true, eg. TLS module/index
+ pair in .got which occupies two words. */
+ memcpy (new_base + addr, old_base + addr,
+ sizeof (ElfW (Addr)));
}
}
break;
}
-
- #undef n
}
/* Write out new_file, and free the buffers. */