License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
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// SPDX-License-Identifier: GPL-2.0
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2013-04-16 23:02:58 +00:00
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/* This is included from relocs_32/64.c */
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2009-12-14 21:55:20 +00:00
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2013-04-12 20:13:42 +00:00
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#define ElfW(type) _ElfW(ELF_BITS, type)
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#define _ElfW(bits, type) __ElfW(bits, type)
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#define __ElfW(bits, type) Elf##bits##_##type
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2013-04-12 20:13:44 +00:00
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#define Elf_Addr ElfW(Addr)
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2013-04-12 20:13:42 +00:00
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#define Elf_Ehdr ElfW(Ehdr)
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#define Elf_Phdr ElfW(Phdr)
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#define Elf_Shdr ElfW(Shdr)
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#define Elf_Sym ElfW(Sym)
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2018-11-29 15:56:15 +00:00
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static Elf_Ehdr ehdr;
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static unsigned long shnum;
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static unsigned int shstrndx;
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2013-04-12 20:13:43 +00:00
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struct relocs {
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uint32_t *offset;
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unsigned long count;
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unsigned long size;
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};
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static struct relocs relocs16;
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static struct relocs relocs32;
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2014-11-04 08:50:18 +00:00
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#if ELF_BITS == 64
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static struct relocs relocs32neg;
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2013-04-12 20:13:44 +00:00
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static struct relocs relocs64;
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2021-06-25 15:10:16 +00:00
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#define FMT PRIu64
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#else
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#define FMT PRIu32
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2014-11-04 08:50:18 +00:00
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#endif
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2006-12-07 01:14:04 +00:00
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2008-06-30 21:42:18 +00:00
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struct section {
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2013-04-12 20:13:42 +00:00
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Elf_Shdr shdr;
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2008-06-30 21:42:18 +00:00
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struct section *link;
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2013-04-12 20:13:42 +00:00
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Elf_Sym *symtab;
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Elf_Rel *reltab;
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2008-06-30 21:42:18 +00:00
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char *strtab;
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};
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static struct section *secs;
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2012-05-08 18:22:24 +00:00
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static const char * const sym_regex_kernel[S_NSYMTYPES] = {
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2006-12-07 01:14:04 +00:00
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/*
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* Following symbols have been audited. There values are constant and do
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* not change if bzImage is loaded at a different physical address than
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* the address for which it has been compiled. Don't warn user about
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* absolute relocations present w.r.t these symbols.
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*/
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2012-05-08 18:22:24 +00:00
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[S_ABS] =
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2009-12-14 21:55:20 +00:00
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"^(xen_irq_disable_direct_reloc$|"
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"xen_save_fl_direct_reloc$|"
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"VDSO|"
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2012-05-08 18:22:24 +00:00
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"__crc_)",
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2006-12-07 01:14:04 +00:00
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2009-12-14 21:55:20 +00:00
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/*
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* These symbols are known to be relative, even if the linker marks them
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* as absolute (typically defined outside any section in the linker script.)
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*/
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2012-05-08 18:22:24 +00:00
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[S_REL] =
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2012-05-18 07:24:09 +00:00
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"^(__init_(begin|end)|"
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"__x86_cpu_dev_(start|end)|"
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2021-07-08 08:57:09 +00:00
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"(__parainstructions|__alt_instructions)(_end)?|"
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"(__iommu_table|__apicdrivers|__smp_locks)(_end)?|"
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2012-05-23 21:02:34 +00:00
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"__(start|end)_pci_.*|"
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"__(start|end)_builtin_fw|"
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2021-07-08 08:57:09 +00:00
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"__(start|stop)___ksymtab(_gpl)?|"
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"__(start|stop)___kcrctab(_gpl)?|"
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2012-05-23 21:02:34 +00:00
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"__(start|stop)___param|"
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"__(start|stop)___modver|"
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"__(start|stop)___bug_table|"
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"__tracedata_(start|end)|"
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"__(start|stop)_notes|"
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"__end_rodata|"
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2018-08-09 09:44:49 +00:00
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"__end_rodata_aligned|"
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2012-05-23 21:02:34 +00:00
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"__initramfs_start|"
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2012-05-24 14:01:38 +00:00
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"(jiffies|jiffies_64)|"
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2013-04-16 23:02:58 +00:00
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#if ELF_BITS == 64
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2013-04-12 20:13:44 +00:00
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"__per_cpu_load|"
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"init_per_cpu__.*|"
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"__end_rodata_hpage_align|"
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#endif
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2014-03-17 22:22:01 +00:00
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"__vvar_page|"
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2012-05-18 07:24:09 +00:00
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"_end)$"
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2012-05-08 18:22:24 +00:00
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};
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static const char * const sym_regex_realmode[S_NSYMTYPES] = {
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2012-05-08 18:22:31 +00:00
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/*
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* These symbols are known to be relative, even if the linker marks them
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* as absolute (typically defined outside any section in the linker script.)
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*/
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[S_REL] =
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"^pa_",
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2012-05-08 18:22:24 +00:00
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/*
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* These are 16-bit segment symbols when compiling 16-bit code.
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*/
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[S_SEG] =
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"^real_mode_seg$",
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/*
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* These are offsets belonging to segments, as opposed to linear addresses,
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* when compiling 16-bit code.
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*/
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[S_LIN] =
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"^pa_",
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};
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static const char * const *sym_regex;
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static regex_t sym_regex_c[S_NSYMTYPES];
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static int is_reloc(enum symtype type, const char *sym_name)
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2006-12-07 01:14:04 +00:00
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{
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2012-05-08 18:22:24 +00:00
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return sym_regex[type] &&
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!regexec(&sym_regex_c[type], sym_name, 0, NULL, 0);
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2009-12-14 21:55:20 +00:00
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}
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2006-12-07 01:14:04 +00:00
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2012-05-08 18:22:24 +00:00
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static void regex_init(int use_real_mode)
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2009-12-14 21:55:20 +00:00
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{
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char errbuf[128];
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int err;
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2012-05-08 18:22:24 +00:00
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int i;
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2009-12-14 21:55:20 +00:00
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2012-05-08 18:22:24 +00:00
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if (use_real_mode)
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sym_regex = sym_regex_realmode;
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else
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sym_regex = sym_regex_kernel;
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for (i = 0; i < S_NSYMTYPES; i++) {
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if (!sym_regex[i])
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continue;
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err = regcomp(&sym_regex_c[i], sym_regex[i],
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REG_EXTENDED|REG_NOSUB);
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if (err) {
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2018-10-28 12:58:28 +00:00
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regerror(err, &sym_regex_c[i], errbuf, sizeof(errbuf));
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2012-05-08 18:22:24 +00:00
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die("%s", errbuf);
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}
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2009-12-14 21:55:20 +00:00
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}
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2006-12-07 01:14:04 +00:00
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}
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2006-12-07 01:14:04 +00:00
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static const char *sym_type(unsigned type)
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{
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static const char *type_name[] = {
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#define SYM_TYPE(X) [X] = #X
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SYM_TYPE(STT_NOTYPE),
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SYM_TYPE(STT_OBJECT),
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SYM_TYPE(STT_FUNC),
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SYM_TYPE(STT_SECTION),
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SYM_TYPE(STT_FILE),
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SYM_TYPE(STT_COMMON),
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SYM_TYPE(STT_TLS),
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#undef SYM_TYPE
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};
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const char *name = "unknown sym type name";
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2007-02-17 18:10:01 +00:00
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if (type < ARRAY_SIZE(type_name)) {
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2006-12-07 01:14:04 +00:00
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name = type_name[type];
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}
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return name;
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}
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static const char *sym_bind(unsigned bind)
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{
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static const char *bind_name[] = {
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#define SYM_BIND(X) [X] = #X
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SYM_BIND(STB_LOCAL),
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SYM_BIND(STB_GLOBAL),
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SYM_BIND(STB_WEAK),
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#undef SYM_BIND
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};
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const char *name = "unknown sym bind name";
|
2007-02-17 18:10:01 +00:00
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if (bind < ARRAY_SIZE(bind_name)) {
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2006-12-07 01:14:04 +00:00
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name = bind_name[bind];
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}
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return name;
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}
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static const char *sym_visibility(unsigned visibility)
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{
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static const char *visibility_name[] = {
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#define SYM_VISIBILITY(X) [X] = #X
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SYM_VISIBILITY(STV_DEFAULT),
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SYM_VISIBILITY(STV_INTERNAL),
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SYM_VISIBILITY(STV_HIDDEN),
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SYM_VISIBILITY(STV_PROTECTED),
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#undef SYM_VISIBILITY
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};
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const char *name = "unknown sym visibility name";
|
2007-02-17 18:10:01 +00:00
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if (visibility < ARRAY_SIZE(visibility_name)) {
|
2006-12-07 01:14:04 +00:00
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name = visibility_name[visibility];
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}
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return name;
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}
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static const char *rel_type(unsigned type)
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{
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static const char *type_name[] = {
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#define REL_TYPE(X) [X] = #X
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2013-04-16 23:02:58 +00:00
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#if ELF_BITS == 64
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2013-04-12 20:13:44 +00:00
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REL_TYPE(R_X86_64_NONE),
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REL_TYPE(R_X86_64_64),
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2018-09-19 06:51:39 +00:00
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REL_TYPE(R_X86_64_PC64),
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2013-04-12 20:13:44 +00:00
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REL_TYPE(R_X86_64_PC32),
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REL_TYPE(R_X86_64_GOT32),
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REL_TYPE(R_X86_64_PLT32),
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REL_TYPE(R_X86_64_COPY),
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REL_TYPE(R_X86_64_GLOB_DAT),
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REL_TYPE(R_X86_64_JUMP_SLOT),
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REL_TYPE(R_X86_64_RELATIVE),
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REL_TYPE(R_X86_64_GOTPCREL),
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REL_TYPE(R_X86_64_32),
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REL_TYPE(R_X86_64_32S),
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REL_TYPE(R_X86_64_16),
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REL_TYPE(R_X86_64_PC16),
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REL_TYPE(R_X86_64_8),
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REL_TYPE(R_X86_64_PC8),
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#else
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2006-12-07 01:14:04 +00:00
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REL_TYPE(R_386_NONE),
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REL_TYPE(R_386_32),
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REL_TYPE(R_386_PC32),
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REL_TYPE(R_386_GOT32),
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REL_TYPE(R_386_PLT32),
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REL_TYPE(R_386_COPY),
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REL_TYPE(R_386_GLOB_DAT),
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REL_TYPE(R_386_JMP_SLOT),
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REL_TYPE(R_386_RELATIVE),
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REL_TYPE(R_386_GOTOFF),
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REL_TYPE(R_386_GOTPC),
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2012-05-08 18:22:24 +00:00
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REL_TYPE(R_386_8),
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REL_TYPE(R_386_PC8),
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REL_TYPE(R_386_16),
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REL_TYPE(R_386_PC16),
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2013-04-12 20:13:44 +00:00
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#endif
|
2006-12-07 01:14:04 +00:00
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#undef REL_TYPE
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};
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const char *name = "unknown type rel type name";
|
2009-12-14 21:55:20 +00:00
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|
|
if (type < ARRAY_SIZE(type_name) && type_name[type]) {
|
2006-12-07 01:14:04 +00:00
|
|
|
name = type_name[type];
|
|
|
|
}
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const char *sec_name(unsigned shndx)
|
|
|
|
{
|
|
|
|
const char *sec_strtab;
|
|
|
|
const char *name;
|
2018-11-29 15:56:15 +00:00
|
|
|
sec_strtab = secs[shstrndx].strtab;
|
2006-12-07 01:14:04 +00:00
|
|
|
name = "<noname>";
|
2018-11-29 15:56:15 +00:00
|
|
|
if (shndx < shnum) {
|
2008-06-30 21:42:18 +00:00
|
|
|
name = sec_strtab + secs[shndx].shdr.sh_name;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
else if (shndx == SHN_ABS) {
|
|
|
|
name = "ABSOLUTE";
|
|
|
|
}
|
|
|
|
else if (shndx == SHN_COMMON) {
|
|
|
|
name = "COMMON";
|
|
|
|
}
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:42 +00:00
|
|
|
static const char *sym_name(const char *sym_strtab, Elf_Sym *sym)
|
2006-12-07 01:14:04 +00:00
|
|
|
{
|
|
|
|
const char *name;
|
|
|
|
name = "<noname>";
|
|
|
|
if (sym->st_name) {
|
|
|
|
name = sym_strtab + sym->st_name;
|
|
|
|
}
|
|
|
|
else {
|
2012-05-08 18:22:24 +00:00
|
|
|
name = sec_name(sym->st_shndx);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
static Elf_Sym *sym_lookup(const char *symname)
|
|
|
|
{
|
|
|
|
int i;
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2013-04-12 20:13:44 +00:00
|
|
|
struct section *sec = &secs[i];
|
|
|
|
long nsyms;
|
|
|
|
char *strtab;
|
|
|
|
Elf_Sym *symtab;
|
|
|
|
Elf_Sym *sym;
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
if (sec->shdr.sh_type != SHT_SYMTAB)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
nsyms = sec->shdr.sh_size/sizeof(Elf_Sym);
|
|
|
|
symtab = sec->symtab;
|
|
|
|
strtab = sec->link->strtab;
|
|
|
|
|
|
|
|
for (sym = symtab; --nsyms >= 0; sym++) {
|
|
|
|
if (!sym->st_name)
|
|
|
|
continue;
|
|
|
|
if (strcmp(symname, strtab + sym->st_name) == 0)
|
|
|
|
return sym;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2010-05-26 15:30:15 +00:00
|
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
2006-12-07 01:14:04 +00:00
|
|
|
#define le16_to_cpu(val) (val)
|
|
|
|
#define le32_to_cpu(val) (val)
|
2013-04-12 20:13:44 +00:00
|
|
|
#define le64_to_cpu(val) (val)
|
2006-12-07 01:14:04 +00:00
|
|
|
#endif
|
2010-05-26 15:30:15 +00:00
|
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
2006-12-07 01:14:04 +00:00
|
|
|
#define le16_to_cpu(val) bswap_16(val)
|
|
|
|
#define le32_to_cpu(val) bswap_32(val)
|
2013-04-12 20:13:44 +00:00
|
|
|
#define le64_to_cpu(val) bswap_64(val)
|
2006-12-07 01:14:04 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
static uint16_t elf16_to_cpu(uint16_t val)
|
|
|
|
{
|
|
|
|
return le16_to_cpu(val);
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t elf32_to_cpu(uint32_t val)
|
|
|
|
{
|
|
|
|
return le32_to_cpu(val);
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:42 +00:00
|
|
|
#define elf_half_to_cpu(x) elf16_to_cpu(x)
|
|
|
|
#define elf_word_to_cpu(x) elf32_to_cpu(x)
|
2013-04-12 20:13:44 +00:00
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#if ELF_BITS == 64
|
2013-04-12 20:13:44 +00:00
|
|
|
static uint64_t elf64_to_cpu(uint64_t val)
|
|
|
|
{
|
|
|
|
return le64_to_cpu(val);
|
|
|
|
}
|
|
|
|
#define elf_addr_to_cpu(x) elf64_to_cpu(x)
|
|
|
|
#define elf_off_to_cpu(x) elf64_to_cpu(x)
|
|
|
|
#define elf_xword_to_cpu(x) elf64_to_cpu(x)
|
|
|
|
#else
|
2013-04-12 20:13:42 +00:00
|
|
|
#define elf_addr_to_cpu(x) elf32_to_cpu(x)
|
|
|
|
#define elf_off_to_cpu(x) elf32_to_cpu(x)
|
|
|
|
#define elf_xword_to_cpu(x) elf32_to_cpu(x)
|
2013-04-12 20:13:44 +00:00
|
|
|
#endif
|
2013-04-12 20:13:42 +00:00
|
|
|
|
2006-12-07 01:14:04 +00:00
|
|
|
static void read_ehdr(FILE *fp)
|
|
|
|
{
|
|
|
|
if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1) {
|
|
|
|
die("Cannot read ELF header: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
}
|
2008-05-03 10:18:03 +00:00
|
|
|
if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) {
|
2006-12-07 01:14:04 +00:00
|
|
|
die("No ELF magic\n");
|
|
|
|
}
|
2013-04-12 20:13:42 +00:00
|
|
|
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS) {
|
|
|
|
die("Not a %d bit executable\n", ELF_BITS);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB) {
|
|
|
|
die("Not a LSB ELF executable\n");
|
|
|
|
}
|
|
|
|
if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
|
|
|
|
die("Unknown ELF version\n");
|
|
|
|
}
|
|
|
|
/* Convert the fields to native endian */
|
2013-04-12 20:13:42 +00:00
|
|
|
ehdr.e_type = elf_half_to_cpu(ehdr.e_type);
|
|
|
|
ehdr.e_machine = elf_half_to_cpu(ehdr.e_machine);
|
|
|
|
ehdr.e_version = elf_word_to_cpu(ehdr.e_version);
|
|
|
|
ehdr.e_entry = elf_addr_to_cpu(ehdr.e_entry);
|
|
|
|
ehdr.e_phoff = elf_off_to_cpu(ehdr.e_phoff);
|
|
|
|
ehdr.e_shoff = elf_off_to_cpu(ehdr.e_shoff);
|
|
|
|
ehdr.e_flags = elf_word_to_cpu(ehdr.e_flags);
|
|
|
|
ehdr.e_ehsize = elf_half_to_cpu(ehdr.e_ehsize);
|
|
|
|
ehdr.e_phentsize = elf_half_to_cpu(ehdr.e_phentsize);
|
|
|
|
ehdr.e_phnum = elf_half_to_cpu(ehdr.e_phnum);
|
|
|
|
ehdr.e_shentsize = elf_half_to_cpu(ehdr.e_shentsize);
|
|
|
|
ehdr.e_shnum = elf_half_to_cpu(ehdr.e_shnum);
|
|
|
|
ehdr.e_shstrndx = elf_half_to_cpu(ehdr.e_shstrndx);
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2018-11-29 15:56:15 +00:00
|
|
|
shnum = ehdr.e_shnum;
|
|
|
|
shstrndx = ehdr.e_shstrndx;
|
|
|
|
|
|
|
|
if ((ehdr.e_type != ET_EXEC) && (ehdr.e_type != ET_DYN))
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Unsupported ELF header type\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
if (ehdr.e_machine != ELF_MACHINE)
|
2013-04-12 20:13:42 +00:00
|
|
|
die("Not for %s\n", ELF_MACHINE_NAME);
|
2018-11-29 15:56:15 +00:00
|
|
|
if (ehdr.e_version != EV_CURRENT)
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Unknown ELF version\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
if (ehdr.e_ehsize != sizeof(Elf_Ehdr))
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Bad Elf header size\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
if (ehdr.e_phentsize != sizeof(Elf_Phdr))
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Bad program header entry\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
if (ehdr.e_shentsize != sizeof(Elf_Shdr))
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Bad section header entry\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
|
|
|
|
|
|
|
|
if (shnum == SHN_UNDEF || shstrndx == SHN_XINDEX) {
|
|
|
|
Elf_Shdr shdr;
|
|
|
|
|
|
|
|
if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0)
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Seek to %" FMT " failed: %s\n", ehdr.e_shoff, strerror(errno));
|
2018-11-29 15:56:15 +00:00
|
|
|
|
|
|
|
if (fread(&shdr, sizeof(shdr), 1, fp) != 1)
|
|
|
|
die("Cannot read initial ELF section header: %s\n", strerror(errno));
|
|
|
|
|
|
|
|
if (shnum == SHN_UNDEF)
|
|
|
|
shnum = elf_xword_to_cpu(shdr.sh_size);
|
|
|
|
|
|
|
|
if (shstrndx == SHN_XINDEX)
|
|
|
|
shstrndx = elf_word_to_cpu(shdr.sh_link);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2018-11-29 15:56:15 +00:00
|
|
|
|
|
|
|
if (shstrndx >= shnum)
|
2006-12-07 01:14:04 +00:00
|
|
|
die("String table index out of bounds\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void read_shdrs(FILE *fp)
|
|
|
|
{
|
|
|
|
int i;
|
2013-04-12 20:13:42 +00:00
|
|
|
Elf_Shdr shdr;
|
2008-06-30 21:42:18 +00:00
|
|
|
|
2018-11-29 15:56:15 +00:00
|
|
|
secs = calloc(shnum, sizeof(struct section));
|
2008-06-30 21:42:18 +00:00
|
|
|
if (!secs) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Unable to allocate %ld section headers\n",
|
2018-11-29 15:56:15 +00:00
|
|
|
shnum);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Seek to %" FMT " failed: %s\n",
|
|
|
|
ehdr.e_shoff, strerror(errno));
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
2018-10-28 12:58:28 +00:00
|
|
|
if (fread(&shdr, sizeof(shdr), 1, fp) != 1)
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Cannot read ELF section headers %d/%ld: %s\n",
|
2018-11-29 15:56:15 +00:00
|
|
|
i, shnum, strerror(errno));
|
2013-04-12 20:13:42 +00:00
|
|
|
sec->shdr.sh_name = elf_word_to_cpu(shdr.sh_name);
|
|
|
|
sec->shdr.sh_type = elf_word_to_cpu(shdr.sh_type);
|
|
|
|
sec->shdr.sh_flags = elf_xword_to_cpu(shdr.sh_flags);
|
|
|
|
sec->shdr.sh_addr = elf_addr_to_cpu(shdr.sh_addr);
|
|
|
|
sec->shdr.sh_offset = elf_off_to_cpu(shdr.sh_offset);
|
|
|
|
sec->shdr.sh_size = elf_xword_to_cpu(shdr.sh_size);
|
|
|
|
sec->shdr.sh_link = elf_word_to_cpu(shdr.sh_link);
|
|
|
|
sec->shdr.sh_info = elf_word_to_cpu(shdr.sh_info);
|
|
|
|
sec->shdr.sh_addralign = elf_xword_to_cpu(shdr.sh_addralign);
|
|
|
|
sec->shdr.sh_entsize = elf_xword_to_cpu(shdr.sh_entsize);
|
2018-11-29 15:56:15 +00:00
|
|
|
if (sec->shdr.sh_link < shnum)
|
2008-06-30 21:42:18 +00:00
|
|
|
sec->link = &secs[sec->shdr.sh_link];
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void read_strtabs(FILE *fp)
|
|
|
|
{
|
|
|
|
int i;
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
|
|
|
if (sec->shdr.sh_type != SHT_STRTAB) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sec->strtab = malloc(sec->shdr.sh_size);
|
|
|
|
if (!sec->strtab) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("malloc of %" FMT " bytes for strtab failed\n",
|
|
|
|
sec->shdr.sh_size);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Seek to %" FMT " failed: %s\n",
|
|
|
|
sec->shdr.sh_offset, strerror(errno));
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fread(sec->strtab, 1, sec->shdr.sh_size, fp)
|
|
|
|
!= sec->shdr.sh_size) {
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Cannot read symbol table: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void read_symtabs(FILE *fp)
|
|
|
|
{
|
|
|
|
int i,j;
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
|
|
|
if (sec->shdr.sh_type != SHT_SYMTAB) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sec->symtab = malloc(sec->shdr.sh_size);
|
|
|
|
if (!sec->symtab) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("malloc of %" FMT " bytes for symtab failed\n",
|
|
|
|
sec->shdr.sh_size);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Seek to %" FMT " failed: %s\n",
|
|
|
|
sec->shdr.sh_offset, strerror(errno));
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fread(sec->symtab, 1, sec->shdr.sh_size, fp)
|
|
|
|
!= sec->shdr.sh_size) {
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Cannot read symbol table: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
}
|
2013-04-12 20:13:42 +00:00
|
|
|
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) {
|
|
|
|
Elf_Sym *sym = &sec->symtab[j];
|
|
|
|
sym->st_name = elf_word_to_cpu(sym->st_name);
|
|
|
|
sym->st_value = elf_addr_to_cpu(sym->st_value);
|
|
|
|
sym->st_size = elf_xword_to_cpu(sym->st_size);
|
|
|
|
sym->st_shndx = elf_half_to_cpu(sym->st_shndx);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void read_relocs(FILE *fp)
|
|
|
|
{
|
|
|
|
int i,j;
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
2013-04-12 20:13:42 +00:00
|
|
|
if (sec->shdr.sh_type != SHT_REL_TYPE) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sec->reltab = malloc(sec->shdr.sh_size);
|
|
|
|
if (!sec->reltab) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("malloc of %" FMT " bytes for relocs failed\n",
|
|
|
|
sec->shdr.sh_size);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fseek(fp, sec->shdr.sh_offset, SEEK_SET) < 0) {
|
2021-06-25 15:10:16 +00:00
|
|
|
die("Seek to %" FMT " failed: %s\n",
|
|
|
|
sec->shdr.sh_offset, strerror(errno));
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
if (fread(sec->reltab, 1, sec->shdr.sh_size, fp)
|
|
|
|
!= sec->shdr.sh_size) {
|
2006-12-07 01:14:04 +00:00
|
|
|
die("Cannot read symbol table: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
}
|
2013-04-12 20:13:42 +00:00
|
|
|
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) {
|
|
|
|
Elf_Rel *rel = &sec->reltab[j];
|
|
|
|
rel->r_offset = elf_addr_to_cpu(rel->r_offset);
|
|
|
|
rel->r_info = elf_xword_to_cpu(rel->r_info);
|
2013-04-12 20:13:44 +00:00
|
|
|
#if (SHT_REL_TYPE == SHT_RELA)
|
|
|
|
rel->r_addend = elf_xword_to_cpu(rel->r_addend);
|
|
|
|
#endif
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void print_absolute_symbols(void)
|
|
|
|
{
|
|
|
|
int i;
|
2013-04-12 20:13:44 +00:00
|
|
|
const char *format;
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
if (ELF_BITS == 64)
|
2013-04-12 20:13:44 +00:00
|
|
|
format = "%5d %016"PRIx64" %5"PRId64" %10s %10s %12s %s\n";
|
|
|
|
else
|
|
|
|
format = "%5d %08"PRIx32" %5"PRId32" %10s %10s %12s %s\n";
|
|
|
|
|
2006-12-07 01:14:04 +00:00
|
|
|
printf("Absolute symbols\n");
|
|
|
|
printf(" Num: Value Size Type Bind Visibility Name\n");
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
2006-12-07 01:14:04 +00:00
|
|
|
char *sym_strtab;
|
|
|
|
int j;
|
2008-06-30 21:42:18 +00:00
|
|
|
|
|
|
|
if (sec->shdr.sh_type != SHT_SYMTAB) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sym_strtab = sec->link->strtab;
|
2013-04-12 20:13:42 +00:00
|
|
|
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Sym); j++) {
|
|
|
|
Elf_Sym *sym;
|
2006-12-07 01:14:04 +00:00
|
|
|
const char *name;
|
2008-06-30 21:42:18 +00:00
|
|
|
sym = &sec->symtab[j];
|
2006-12-07 01:14:04 +00:00
|
|
|
name = sym_name(sym_strtab, sym);
|
|
|
|
if (sym->st_shndx != SHN_ABS) {
|
|
|
|
continue;
|
|
|
|
}
|
2013-04-12 20:13:44 +00:00
|
|
|
printf(format,
|
2006-12-07 01:14:04 +00:00
|
|
|
j, sym->st_value, sym->st_size,
|
2013-04-12 20:13:42 +00:00
|
|
|
sym_type(ELF_ST_TYPE(sym->st_info)),
|
|
|
|
sym_bind(ELF_ST_BIND(sym->st_info)),
|
|
|
|
sym_visibility(ELF_ST_VISIBILITY(sym->st_other)),
|
2006-12-07 01:14:04 +00:00
|
|
|
name);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void print_absolute_relocs(void)
|
|
|
|
{
|
2006-12-07 01:14:04 +00:00
|
|
|
int i, printed = 0;
|
2013-04-12 20:13:44 +00:00
|
|
|
const char *format;
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
if (ELF_BITS == 64)
|
2013-04-12 20:13:44 +00:00
|
|
|
format = "%016"PRIx64" %016"PRIx64" %10s %016"PRIx64" %s\n";
|
|
|
|
else
|
|
|
|
format = "%08"PRIx32" %08"PRIx32" %10s %08"PRIx32" %s\n";
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
|
|
|
struct section *sec_applies, *sec_symtab;
|
2006-12-07 01:14:04 +00:00
|
|
|
char *sym_strtab;
|
2013-04-12 20:13:42 +00:00
|
|
|
Elf_Sym *sh_symtab;
|
2006-12-07 01:14:04 +00:00
|
|
|
int j;
|
2013-04-12 20:13:42 +00:00
|
|
|
if (sec->shdr.sh_type != SHT_REL_TYPE) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sec_symtab = sec->link;
|
|
|
|
sec_applies = &secs[sec->shdr.sh_info];
|
|
|
|
if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sh_symtab = sec_symtab->symtab;
|
|
|
|
sym_strtab = sec_symtab->link->strtab;
|
2013-04-12 20:13:42 +00:00
|
|
|
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) {
|
|
|
|
Elf_Rel *rel;
|
|
|
|
Elf_Sym *sym;
|
2006-12-07 01:14:04 +00:00
|
|
|
const char *name;
|
2008-06-30 21:42:18 +00:00
|
|
|
rel = &sec->reltab[j];
|
2013-04-12 20:13:42 +00:00
|
|
|
sym = &sh_symtab[ELF_R_SYM(rel->r_info)];
|
2006-12-07 01:14:04 +00:00
|
|
|
name = sym_name(sym_strtab, sym);
|
|
|
|
if (sym->st_shndx != SHN_ABS) {
|
|
|
|
continue;
|
|
|
|
}
|
2006-12-07 01:14:04 +00:00
|
|
|
|
|
|
|
/* Absolute symbols are not relocated if bzImage is
|
|
|
|
* loaded at a non-compiled address. Display a warning
|
|
|
|
* to user at compile time about the absolute
|
|
|
|
* relocations present.
|
|
|
|
*
|
|
|
|
* User need to audit the code to make sure
|
|
|
|
* some symbols which should have been section
|
|
|
|
* relative have not become absolute because of some
|
|
|
|
* linker optimization or wrong programming usage.
|
|
|
|
*
|
|
|
|
* Before warning check if this absolute symbol
|
|
|
|
* relocation is harmless.
|
|
|
|
*/
|
2012-05-08 18:22:24 +00:00
|
|
|
if (is_reloc(S_ABS, name) || is_reloc(S_REL, name))
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (!printed) {
|
|
|
|
printf("WARNING: Absolute relocations"
|
|
|
|
" present\n");
|
|
|
|
printf("Offset Info Type Sym.Value "
|
|
|
|
"Sym.Name\n");
|
|
|
|
printed = 1;
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
printf(format,
|
2006-12-07 01:14:04 +00:00
|
|
|
rel->r_offset,
|
|
|
|
rel->r_info,
|
2013-04-12 20:13:42 +00:00
|
|
|
rel_type(ELF_R_TYPE(rel->r_info)),
|
2006-12-07 01:14:04 +00:00
|
|
|
sym->st_value,
|
|
|
|
name);
|
|
|
|
}
|
|
|
|
}
|
2006-12-07 01:14:04 +00:00
|
|
|
|
|
|
|
if (printed)
|
|
|
|
printf("\n");
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
static void add_reloc(struct relocs *r, uint32_t offset)
|
|
|
|
{
|
|
|
|
if (r->count == r->size) {
|
|
|
|
unsigned long newsize = r->size + 50000;
|
|
|
|
void *mem = realloc(r->offset, newsize * sizeof(r->offset[0]));
|
|
|
|
|
|
|
|
if (!mem)
|
|
|
|
die("realloc of %ld entries for relocs failed\n",
|
|
|
|
newsize);
|
|
|
|
r->offset = mem;
|
|
|
|
r->size = newsize;
|
|
|
|
}
|
|
|
|
r->offset[r->count++] = offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void walk_relocs(int (*process)(struct section *sec, Elf_Rel *rel,
|
|
|
|
Elf_Sym *sym, const char *symname))
|
2006-12-07 01:14:04 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
/* Walk through the relocations */
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2006-12-07 01:14:04 +00:00
|
|
|
char *sym_strtab;
|
2013-04-12 20:13:42 +00:00
|
|
|
Elf_Sym *sh_symtab;
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec_applies, *sec_symtab;
|
2006-12-07 01:14:04 +00:00
|
|
|
int j;
|
2008-06-30 21:42:18 +00:00
|
|
|
struct section *sec = &secs[i];
|
|
|
|
|
2013-04-12 20:13:42 +00:00
|
|
|
if (sec->shdr.sh_type != SHT_REL_TYPE) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sec_symtab = sec->link;
|
|
|
|
sec_applies = &secs[sec->shdr.sh_info];
|
|
|
|
if (!(sec_applies->shdr.sh_flags & SHF_ALLOC)) {
|
2006-12-07 01:14:04 +00:00
|
|
|
continue;
|
|
|
|
}
|
2008-06-30 21:42:18 +00:00
|
|
|
sh_symtab = sec_symtab->symtab;
|
2008-10-03 20:00:56 +00:00
|
|
|
sym_strtab = sec_symtab->link->strtab;
|
2013-04-12 20:13:42 +00:00
|
|
|
for (j = 0; j < sec->shdr.sh_size/sizeof(Elf_Rel); j++) {
|
2013-04-12 20:13:43 +00:00
|
|
|
Elf_Rel *rel = &sec->reltab[j];
|
|
|
|
Elf_Sym *sym = &sh_symtab[ELF_R_SYM(rel->r_info)];
|
|
|
|
const char *symname = sym_name(sym_strtab, sym);
|
2012-05-18 16:52:01 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
process(sec, rel, sym, symname);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
/*
|
|
|
|
* The .data..percpu section is a special case for x86_64 SMP kernels.
|
|
|
|
* It is used to initialize the actual per_cpu areas and to provide
|
|
|
|
* definitions for the per_cpu variables that correspond to their offsets
|
|
|
|
* within the percpu area. Since the values of all of the symbols need
|
|
|
|
* to be offsets from the start of the per_cpu area the virtual address
|
|
|
|
* (sh_addr) of .data..percpu is 0 in SMP kernels.
|
|
|
|
*
|
|
|
|
* This means that:
|
|
|
|
*
|
|
|
|
* Relocations that reference symbols in the per_cpu area do not
|
|
|
|
* need further relocation (since the value is an offset relative
|
|
|
|
* to the start of the per_cpu area that does not change).
|
|
|
|
*
|
|
|
|
* Relocations that apply to the per_cpu area need to have their
|
|
|
|
* offset adjusted by by the value of __per_cpu_load to make them
|
|
|
|
* point to the correct place in the loaded image (because the
|
|
|
|
* virtual address of .data..percpu is 0).
|
|
|
|
*
|
|
|
|
* For non SMP kernels .data..percpu is linked as part of the normal
|
|
|
|
* kernel data and does not require special treatment.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int per_cpu_shndx = -1;
|
2014-09-24 12:30:12 +00:00
|
|
|
static Elf_Addr per_cpu_load_addr;
|
2013-04-12 20:13:44 +00:00
|
|
|
|
|
|
|
static void percpu_init(void)
|
|
|
|
{
|
|
|
|
int i;
|
2018-11-29 15:56:15 +00:00
|
|
|
for (i = 0; i < shnum; i++) {
|
2013-04-12 20:13:44 +00:00
|
|
|
ElfW(Sym) *sym;
|
|
|
|
if (strcmp(sec_name(i), ".data..percpu"))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (secs[i].shdr.sh_addr != 0) /* non SMP kernel */
|
|
|
|
return;
|
|
|
|
|
|
|
|
sym = sym_lookup("__per_cpu_load");
|
|
|
|
if (!sym)
|
|
|
|
die("can't find __per_cpu_load\n");
|
|
|
|
|
|
|
|
per_cpu_shndx = i;
|
|
|
|
per_cpu_load_addr = sym->st_value;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#if ELF_BITS == 64
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
/*
|
|
|
|
* Check to see if a symbol lies in the .data..percpu section.
|
2013-10-11 01:39:54 +00:00
|
|
|
*
|
|
|
|
* The linker incorrectly associates some symbols with the
|
|
|
|
* .data..percpu section so we also need to check the symbol
|
|
|
|
* name to make sure that we classify the symbol correctly.
|
|
|
|
*
|
|
|
|
* The GNU linker incorrectly associates:
|
|
|
|
* __init_begin
|
2013-10-16 06:43:14 +00:00
|
|
|
* __per_cpu_load
|
2013-10-11 01:39:54 +00:00
|
|
|
*
|
|
|
|
* The "gold" linker incorrectly associates:
|
2019-04-14 16:00:06 +00:00
|
|
|
* init_per_cpu__fixed_percpu_data
|
2013-10-11 01:39:54 +00:00
|
|
|
* init_per_cpu__gdt_page
|
2013-04-12 20:13:44 +00:00
|
|
|
*/
|
|
|
|
static int is_percpu_sym(ElfW(Sym) *sym, const char *symname)
|
|
|
|
{
|
|
|
|
return (sym->st_shndx == per_cpu_shndx) &&
|
2013-10-11 01:39:54 +00:00
|
|
|
strcmp(symname, "__init_begin") &&
|
2013-10-16 06:43:14 +00:00
|
|
|
strcmp(symname, "__per_cpu_load") &&
|
2013-10-11 01:39:54 +00:00
|
|
|
strncmp(symname, "init_per_cpu_", 13);
|
2013-04-12 20:13:44 +00:00
|
|
|
}
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
|
|
|
|
const char *symname)
|
|
|
|
{
|
|
|
|
unsigned r_type = ELF64_R_TYPE(rel->r_info);
|
|
|
|
ElfW(Addr) offset = rel->r_offset;
|
|
|
|
int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname);
|
|
|
|
|
|
|
|
if (sym->st_shndx == SHN_UNDEF)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Adjust the offset if this reloc applies to the percpu section.
|
|
|
|
*/
|
|
|
|
if (sec->shdr.sh_info == per_cpu_shndx)
|
|
|
|
offset += per_cpu_load_addr;
|
|
|
|
|
|
|
|
switch (r_type) {
|
|
|
|
case R_X86_64_NONE:
|
2014-11-04 08:50:18 +00:00
|
|
|
/* NONE can be ignored. */
|
|
|
|
break;
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
case R_X86_64_PC32:
|
x86: Treat R_X86_64_PLT32 as R_X86_64_PC32
On i386, there are 2 types of PLTs, PIC and non-PIC. PIE and shared
objects must use PIC PLT. To use PIC PLT, you need to load
_GLOBAL_OFFSET_TABLE_ into EBX first. There is no need for that on
x86-64 since x86-64 uses PC-relative PLT.
On x86-64, for 32-bit PC-relative branches, we can generate PLT32
relocation, instead of PC32 relocation, which can also be used as
a marker for 32-bit PC-relative branches. Linker can always reduce
PLT32 relocation to PC32 if function is defined locally. Local
functions should use PC32 relocation. As far as Linux kernel is
concerned, R_X86_64_PLT32 can be treated the same as R_X86_64_PC32
since Linux kernel doesn't use PLT.
R_X86_64_PLT32 for 32-bit PC-relative branches has been enabled in
binutils master branch which will become binutils 2.31.
[ hjl is working on having better documentation on this all, but a few
more notes from him:
"PLT32 relocation is used as marker for PC-relative branches. Because
of EBX, it looks odd to generate PLT32 relocation on i386 when EBX
doesn't have GOT.
As for symbol resolution, PLT32 and PC32 relocations are almost
interchangeable. But when linker sees PLT32 relocation against a
protected symbol, it can resolved locally at link-time since it is
used on a branch instruction. Linker can't do that for PC32
relocation"
but for the kernel use, the two are basically the same, and this
commit gets things building and working with the current binutils
master - Linus ]
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-07 22:20:09 +00:00
|
|
|
case R_X86_64_PLT32:
|
2013-04-12 20:13:44 +00:00
|
|
|
/*
|
2014-11-04 08:50:18 +00:00
|
|
|
* PC relative relocations don't need to be adjusted unless
|
|
|
|
* referencing a percpu symbol.
|
x86: Treat R_X86_64_PLT32 as R_X86_64_PC32
On i386, there are 2 types of PLTs, PIC and non-PIC. PIE and shared
objects must use PIC PLT. To use PIC PLT, you need to load
_GLOBAL_OFFSET_TABLE_ into EBX first. There is no need for that on
x86-64 since x86-64 uses PC-relative PLT.
On x86-64, for 32-bit PC-relative branches, we can generate PLT32
relocation, instead of PC32 relocation, which can also be used as
a marker for 32-bit PC-relative branches. Linker can always reduce
PLT32 relocation to PC32 if function is defined locally. Local
functions should use PC32 relocation. As far as Linux kernel is
concerned, R_X86_64_PLT32 can be treated the same as R_X86_64_PC32
since Linux kernel doesn't use PLT.
R_X86_64_PLT32 for 32-bit PC-relative branches has been enabled in
binutils master branch which will become binutils 2.31.
[ hjl is working on having better documentation on this all, but a few
more notes from him:
"PLT32 relocation is used as marker for PC-relative branches. Because
of EBX, it looks odd to generate PLT32 relocation on i386 when EBX
doesn't have GOT.
As for symbol resolution, PLT32 and PC32 relocations are almost
interchangeable. But when linker sees PLT32 relocation against a
protected symbol, it can resolved locally at link-time since it is
used on a branch instruction. Linker can't do that for PC32
relocation"
but for the kernel use, the two are basically the same, and this
commit gets things building and working with the current binutils
master - Linus ]
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-07 22:20:09 +00:00
|
|
|
*
|
|
|
|
* NB: R_X86_64_PLT32 can be treated as R_X86_64_PC32.
|
2013-04-12 20:13:44 +00:00
|
|
|
*/
|
2014-11-04 08:50:18 +00:00
|
|
|
if (is_percpu_sym(sym, symname))
|
|
|
|
add_reloc(&relocs32neg, offset);
|
2013-04-12 20:13:44 +00:00
|
|
|
break;
|
|
|
|
|
2018-09-19 06:51:39 +00:00
|
|
|
case R_X86_64_PC64:
|
|
|
|
/*
|
|
|
|
* Only used by jump labels
|
|
|
|
*/
|
|
|
|
if (is_percpu_sym(sym, symname))
|
|
|
|
die("Invalid R_X86_64_PC64 relocation against per-CPU symbol %s\n",
|
|
|
|
symname);
|
|
|
|
break;
|
|
|
|
|
2013-04-12 20:13:44 +00:00
|
|
|
case R_X86_64_32:
|
|
|
|
case R_X86_64_32S:
|
|
|
|
case R_X86_64_64:
|
|
|
|
/*
|
|
|
|
* References to the percpu area don't need to be adjusted.
|
|
|
|
*/
|
|
|
|
if (is_percpu_sym(sym, symname))
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (shn_abs) {
|
|
|
|
/*
|
|
|
|
* Whitelisted absolute symbols do not require
|
|
|
|
* relocation.
|
|
|
|
*/
|
|
|
|
if (is_reloc(S_ABS, symname))
|
|
|
|
break;
|
|
|
|
|
|
|
|
die("Invalid absolute %s relocation: %s\n",
|
|
|
|
rel_type(r_type), symname);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Relocation offsets for 64 bit kernels are output
|
|
|
|
* as 32 bits and sign extended back to 64 bits when
|
|
|
|
* the relocations are processed.
|
|
|
|
* Make sure that the offset will fit.
|
|
|
|
*/
|
|
|
|
if ((int32_t)offset != (int64_t)offset)
|
|
|
|
die("Relocation offset doesn't fit in 32 bits\n");
|
|
|
|
|
|
|
|
if (r_type == R_X86_64_64)
|
|
|
|
add_reloc(&relocs64, offset);
|
|
|
|
else
|
|
|
|
add_reloc(&relocs32, offset);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
die("Unsupported relocation type: %s (%d)\n",
|
|
|
|
rel_type(r_type), r_type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#else
|
2013-04-12 20:13:44 +00:00
|
|
|
|
|
|
|
static int do_reloc32(struct section *sec, Elf_Rel *rel, Elf_Sym *sym,
|
|
|
|
const char *symname)
|
2013-04-12 20:13:43 +00:00
|
|
|
{
|
|
|
|
unsigned r_type = ELF32_R_TYPE(rel->r_info);
|
|
|
|
int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname);
|
|
|
|
|
|
|
|
switch (r_type) {
|
|
|
|
case R_386_NONE:
|
|
|
|
case R_386_PC32:
|
|
|
|
case R_386_PC16:
|
|
|
|
case R_386_PC8:
|
2021-01-27 20:56:00 +00:00
|
|
|
case R_386_PLT32:
|
2013-04-12 20:13:43 +00:00
|
|
|
/*
|
2021-01-27 20:56:00 +00:00
|
|
|
* NONE can be ignored and PC relative relocations don't need
|
|
|
|
* to be adjusted. Because sym must be defined, R_386_PLT32 can
|
|
|
|
* be treated the same way as R_386_PC32.
|
2013-04-12 20:13:43 +00:00
|
|
|
*/
|
|
|
|
break;
|
|
|
|
|
|
|
|
case R_386_32:
|
|
|
|
if (shn_abs) {
|
|
|
|
/*
|
|
|
|
* Whitelisted absolute symbols do not require
|
|
|
|
* relocation.
|
|
|
|
*/
|
|
|
|
if (is_reloc(S_ABS, symname))
|
2009-12-14 21:55:20 +00:00
|
|
|
break;
|
2012-05-08 18:22:24 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
die("Invalid absolute %s relocation: %s\n",
|
|
|
|
rel_type(r_type), symname);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
add_reloc(&relocs32, rel->r_offset);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
die("Unsupported relocation type: %s (%d)\n",
|
|
|
|
rel_type(r_type), r_type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int do_reloc_real(struct section *sec, Elf_Rel *rel, Elf_Sym *sym,
|
|
|
|
const char *symname)
|
|
|
|
{
|
|
|
|
unsigned r_type = ELF32_R_TYPE(rel->r_info);
|
|
|
|
int shn_abs = (sym->st_shndx == SHN_ABS) && !is_reloc(S_REL, symname);
|
|
|
|
|
|
|
|
switch (r_type) {
|
|
|
|
case R_386_NONE:
|
|
|
|
case R_386_PC32:
|
|
|
|
case R_386_PC16:
|
|
|
|
case R_386_PC8:
|
2021-01-27 20:56:00 +00:00
|
|
|
case R_386_PLT32:
|
2013-04-12 20:13:43 +00:00
|
|
|
/*
|
2021-01-27 20:56:00 +00:00
|
|
|
* NONE can be ignored and PC relative relocations don't need
|
|
|
|
* to be adjusted. Because sym must be defined, R_386_PLT32 can
|
|
|
|
* be treated the same way as R_386_PC32.
|
2013-04-12 20:13:43 +00:00
|
|
|
*/
|
|
|
|
break;
|
|
|
|
|
|
|
|
case R_386_16:
|
|
|
|
if (shn_abs) {
|
|
|
|
/*
|
|
|
|
* Whitelisted absolute symbols do not require
|
|
|
|
* relocation.
|
|
|
|
*/
|
|
|
|
if (is_reloc(S_ABS, symname))
|
2012-05-08 18:22:24 +00:00
|
|
|
break;
|
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
if (is_reloc(S_SEG, symname)) {
|
|
|
|
add_reloc(&relocs16, rel->r_offset);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (!is_reloc(S_LIN, symname))
|
2009-12-14 21:55:20 +00:00
|
|
|
break;
|
2013-04-12 20:13:43 +00:00
|
|
|
}
|
|
|
|
die("Invalid %s %s relocation: %s\n",
|
|
|
|
shn_abs ? "absolute" : "relative",
|
|
|
|
rel_type(r_type), symname);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case R_386_32:
|
|
|
|
if (shn_abs) {
|
|
|
|
/*
|
|
|
|
* Whitelisted absolute symbols do not require
|
|
|
|
* relocation.
|
|
|
|
*/
|
|
|
|
if (is_reloc(S_ABS, symname))
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (is_reloc(S_REL, symname)) {
|
|
|
|
add_reloc(&relocs32, rel->r_offset);
|
2009-12-14 21:55:20 +00:00
|
|
|
break;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2013-04-12 20:13:43 +00:00
|
|
|
} else {
|
|
|
|
if (is_reloc(S_LIN, symname))
|
|
|
|
add_reloc(&relocs32, rel->r_offset);
|
|
|
|
break;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2013-04-12 20:13:43 +00:00
|
|
|
die("Invalid %s %s relocation: %s\n",
|
|
|
|
shn_abs ? "absolute" : "relative",
|
|
|
|
rel_type(r_type), symname);
|
|
|
|
break;
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
default:
|
|
|
|
die("Unsupported relocation type: %s (%d)\n",
|
|
|
|
rel_type(r_type), r_type);
|
|
|
|
break;
|
|
|
|
}
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
return 0;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#endif
|
|
|
|
|
2006-12-07 01:14:04 +00:00
|
|
|
static int cmp_relocs(const void *va, const void *vb)
|
|
|
|
{
|
2013-04-12 20:13:43 +00:00
|
|
|
const uint32_t *a, *b;
|
2006-12-07 01:14:04 +00:00
|
|
|
a = va; b = vb;
|
|
|
|
return (*a == *b)? 0 : (*a > *b)? 1 : -1;
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
static void sort_relocs(struct relocs *r)
|
|
|
|
{
|
|
|
|
qsort(r->offset, r->count, sizeof(r->offset[0]), cmp_relocs);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int write32(uint32_t v, FILE *f)
|
2012-05-08 18:22:24 +00:00
|
|
|
{
|
|
|
|
unsigned char buf[4];
|
|
|
|
|
|
|
|
put_unaligned_le32(v, buf);
|
|
|
|
return fwrite(buf, 1, 4, f) == 4 ? 0 : -1;
|
|
|
|
}
|
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
static int write32_as_text(uint32_t v, FILE *f)
|
|
|
|
{
|
|
|
|
return fprintf(f, "\t.long 0x%08"PRIx32"\n", v) > 0 ? 0 : -1;
|
|
|
|
}
|
|
|
|
|
2012-05-08 18:22:24 +00:00
|
|
|
static void emit_relocs(int as_text, int use_real_mode)
|
2006-12-07 01:14:04 +00:00
|
|
|
{
|
|
|
|
int i;
|
2013-04-12 20:13:43 +00:00
|
|
|
int (*write_reloc)(uint32_t, FILE *) = write32;
|
2013-04-12 20:13:44 +00:00
|
|
|
int (*do_reloc)(struct section *sec, Elf_Rel *rel, Elf_Sym *sym,
|
|
|
|
const char *symname);
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#if ELF_BITS == 64
|
|
|
|
if (!use_real_mode)
|
2013-04-12 20:13:44 +00:00
|
|
|
do_reloc = do_reloc64;
|
2013-04-16 23:02:58 +00:00
|
|
|
else
|
|
|
|
die("--realmode not valid for a 64-bit ELF file");
|
|
|
|
#else
|
|
|
|
if (!use_real_mode)
|
2013-04-12 20:13:44 +00:00
|
|
|
do_reloc = do_reloc32;
|
|
|
|
else
|
|
|
|
do_reloc = do_reloc_real;
|
2013-04-16 23:02:58 +00:00
|
|
|
#endif
|
2012-05-08 18:22:24 +00:00
|
|
|
|
2006-12-07 01:14:04 +00:00
|
|
|
/* Collect up the relocations */
|
2013-04-12 20:13:44 +00:00
|
|
|
walk_relocs(do_reloc);
|
2012-05-08 18:22:24 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
if (relocs16.count && !use_real_mode)
|
2012-05-08 18:22:24 +00:00
|
|
|
die("Segment relocations found but --realmode not specified\n");
|
2006-12-07 01:14:04 +00:00
|
|
|
|
|
|
|
/* Order the relocations for more efficient processing */
|
2013-04-12 20:13:43 +00:00
|
|
|
sort_relocs(&relocs32);
|
2014-11-04 08:50:18 +00:00
|
|
|
#if ELF_BITS == 64
|
|
|
|
sort_relocs(&relocs32neg);
|
2013-04-12 20:13:44 +00:00
|
|
|
sort_relocs(&relocs64);
|
2016-12-15 12:45:13 +00:00
|
|
|
#else
|
|
|
|
sort_relocs(&relocs16);
|
2014-11-04 08:50:18 +00:00
|
|
|
#endif
|
2006-12-07 01:14:04 +00:00
|
|
|
|
|
|
|
/* Print the relocations */
|
|
|
|
if (as_text) {
|
|
|
|
/* Print the relocations in a form suitable that
|
|
|
|
* gas will like.
|
|
|
|
*/
|
|
|
|
printf(".section \".data.reloc\",\"a\"\n");
|
|
|
|
printf(".balign 4\n");
|
2013-04-12 20:13:43 +00:00
|
|
|
write_reloc = write32_as_text;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2012-05-08 18:22:24 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
if (use_real_mode) {
|
|
|
|
write_reloc(relocs16.count, stdout);
|
|
|
|
for (i = 0; i < relocs16.count; i++)
|
|
|
|
write_reloc(relocs16.offset[i], stdout);
|
|
|
|
|
|
|
|
write_reloc(relocs32.count, stdout);
|
|
|
|
for (i = 0; i < relocs32.count; i++)
|
|
|
|
write_reloc(relocs32.offset[i], stdout);
|
|
|
|
} else {
|
2014-11-04 08:50:18 +00:00
|
|
|
#if ELF_BITS == 64
|
|
|
|
/* Print a stop */
|
|
|
|
write_reloc(0, stdout);
|
2013-04-12 20:13:44 +00:00
|
|
|
|
2014-11-04 08:50:18 +00:00
|
|
|
/* Now print each relocation */
|
|
|
|
for (i = 0; i < relocs64.count; i++)
|
|
|
|
write_reloc(relocs64.offset[i], stdout);
|
|
|
|
|
|
|
|
/* Print a stop */
|
|
|
|
write_reloc(0, stdout);
|
|
|
|
|
|
|
|
/* Now print each inverse 32-bit relocation */
|
|
|
|
for (i = 0; i < relocs32neg.count; i++)
|
|
|
|
write_reloc(relocs32neg.offset[i], stdout);
|
|
|
|
#endif
|
2013-04-12 20:13:44 +00:00
|
|
|
|
2013-04-12 20:13:43 +00:00
|
|
|
/* Print a stop */
|
|
|
|
write_reloc(0, stdout);
|
|
|
|
|
|
|
|
/* Now print each relocation */
|
|
|
|
for (i = 0; i < relocs32.count; i++)
|
|
|
|
write_reloc(relocs32.offset[i], stdout);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-01-21 20:32:23 +00:00
|
|
|
/*
|
|
|
|
* As an aid to debugging problems with different linkers
|
|
|
|
* print summary information about the relocs.
|
|
|
|
* Since different linkers tend to emit the sections in
|
|
|
|
* different orders we use the section names in the output.
|
|
|
|
*/
|
|
|
|
static int do_reloc_info(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
|
|
|
|
const char *symname)
|
|
|
|
{
|
|
|
|
printf("%s\t%s\t%s\t%s\n",
|
|
|
|
sec_name(sec->shdr.sh_info),
|
|
|
|
rel_type(ELF_R_TYPE(rel->r_info)),
|
|
|
|
symname,
|
|
|
|
sec_name(sym->st_shndx));
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void print_reloc_info(void)
|
|
|
|
{
|
|
|
|
printf("reloc section\treloc type\tsymbol\tsymbol section\n");
|
|
|
|
walk_relocs(do_reloc_info);
|
|
|
|
}
|
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
#if ELF_BITS == 64
|
|
|
|
# define process process_64
|
|
|
|
#else
|
|
|
|
# define process process_32
|
|
|
|
#endif
|
2006-12-07 01:14:04 +00:00
|
|
|
|
2013-04-16 23:02:58 +00:00
|
|
|
void process(FILE *fp, int use_real_mode, int as_text,
|
2014-01-21 20:32:23 +00:00
|
|
|
int show_absolute_syms, int show_absolute_relocs,
|
|
|
|
int show_reloc_info)
|
2006-12-07 01:14:04 +00:00
|
|
|
{
|
2012-05-08 18:22:24 +00:00
|
|
|
regex_init(use_real_mode);
|
2006-12-07 01:14:04 +00:00
|
|
|
read_ehdr(fp);
|
|
|
|
read_shdrs(fp);
|
|
|
|
read_strtabs(fp);
|
|
|
|
read_symtabs(fp);
|
|
|
|
read_relocs(fp);
|
2013-04-16 23:02:58 +00:00
|
|
|
if (ELF_BITS == 64)
|
2013-04-12 20:13:44 +00:00
|
|
|
percpu_init();
|
2006-12-07 01:14:04 +00:00
|
|
|
if (show_absolute_syms) {
|
2006-12-07 01:14:04 +00:00
|
|
|
print_absolute_symbols();
|
2013-04-16 23:02:58 +00:00
|
|
|
return;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
|
|
|
if (show_absolute_relocs) {
|
2006-12-07 01:14:04 +00:00
|
|
|
print_absolute_relocs();
|
2013-04-16 23:02:58 +00:00
|
|
|
return;
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|
2014-01-21 20:32:23 +00:00
|
|
|
if (show_reloc_info) {
|
|
|
|
print_reloc_info();
|
|
|
|
return;
|
|
|
|
}
|
2012-05-08 18:22:24 +00:00
|
|
|
emit_relocs(as_text, use_real_mode);
|
2006-12-07 01:14:04 +00:00
|
|
|
}
|