usr.bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

elfdump: handle small files more gracefully

elfdump -E on an empty file would complain "Invalid argument" because
it tried to mmap zero bytes. With the -E flag, elfdump should
simply exit non-zero. For tiny files, the code would reference off
the end of the mapped region.

Ensure the file is large enough to contain an ELF header before mapping it.

MFC after: 1 week
Sponsored by: Dell EMC Isilon

elfdump: use designated array initialization for note types

This ensures the note type name is in the correct slot.

PR: 228290
Submitted by: kib
MFC with: 343610
Sponsored by: The FreeBSD Foundation

elfdump: fix build after r343610

One patch hunk did not survive the trip from git to svn.

PR: 228290
MFC with: r343610

elfdump: include note type names

Based on a patch submitted by Dan McGregor.

PR: 228290
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

elfdump: whitespace fixup in advance of other changes

elfdump: Add -E to test if a file is an ELF binary.

This is intended to replace potentially unreliable checks like:

file -b $1 | grep -q '^ELF ..-bit .SB executable'

Reviewed by: emaste
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15971

capsicum: use a new capsicum helpers in tools

Use caph_{rights,ioctls,fcntls}_limit to simplify the code.

Convert `cap_enter() < 0 && errno != ENOSYS` to `caph_enter() < 0`.

No functional change intended.

elfdump: chase ABI tag note name change from r232832

r232832 changed the ABI tag note name from .note.ABI-tag to .note.tag.
Follow suit in elfdump.

Elfdump's note parsing is very basic and should be significantly
reworked, but for now just restore the broken functionality.

PR: 228290
Submitted by: martin at lispworks.com
MFC after: 1 week

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

elfdump: correct DT_AUXILIARY / DT_USED / DT_FILTER definitions

r109332 introduced these three as DT_SUNW_*. Update to the correct
names already used elsewhere in FreeBSD and the Sun "Linker and
Libraries Guide"

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

Remove the duplicated code using Capsicum helpers.

Reviewed by: cem, ed, bapt, emaste
Differential Revision https://reviews.freebsd.org/D8140

elfdump: limit STDIN to no rights rather than closing it

Closing stdin/stdout/stderr is often a bad idea as a future open()
can end up with its fd. Leave it open and limit it to no rights
instead.

Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D7984

elfdump: adjust stdout/stderr capabilities

stdio uses fstat and the TIOCGETA ioctl. Also collapse the
cap_rights_limit and new cap_ioctls_limit calls into one if statement.
Errors here are not actionable by the user and distinguishing stdout
from stderr doesn't really have value.

Reported by: kib
Reviewed by: allanjude, bapt
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D7944

elfdump: handle STT_SPARC_REGISTER

STT_SPARC_REGISTER is a SPARC-specific symbol type specified by the
Sparcv9 ABI to provide some information on register use by the object.

Also rework st_info type lookup to avoid out-of-bounds array access.

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

Rename ELFOSABI_SYSV to ELFOSABI_NONE to match current spec

Source: http://www.sco.com/developers/gabi/latest/ch4.eheader.html

Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3731

elfdump: report MIPS ELF section type SHT_MIPS_REGINFO

Sponsored by: The FreeBSD Foundation

elfdump: report MIPS-specific section type SHT_MIPS_ABIFLAGS

Sponsored by: The FreeBSD Foundation

Add RISC-V ELF machine type definition

EM_RISCV is now officially registered as e_machine 243.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Add ELF machine EM_IAMCU, 32-bit Intel MCU

It is e_machine 6, which was previously reserved for 486.

Limit descriptors and enter capability mode.

Differential: D1009
Reviewed by: jonathan, pjd
MFC after: 2 weeks
Relnotes: yes

elfdump: Remove extraneous _SUNW_ in reported DT_ names

Sponsored by: The FreeBSD Foundation

Rename DT_FEATURE_1 to DT_FEATURE

This provides a minor cleanup in elfdump; there are otherwise no
consumers in the tree. Old SUN documentation can be found for either
variant, but GNU binutils switched to DT_FEATURE around 2000.

Sponsored by: The FreeBSD Foundation

elfdump: use existing ELF constants where available

Sponsored by: The FreeBSD Foundation

elfdump: add EM_AARCH64 64-bit ARM machine architecture

Further improvements on elfdump, to follow up r269092:

- Add ARM specific section header types.
- Add SHT_GNU_HASH section header type.
- Improve reporting of undefined tags in d_tags.
- Add DT_GNU_HASH tag.

Reviewed by: emaste

elfdump: Improve section type reporting

The SHT range 0x70000000-0x7fffffff is processor-specific. Pass the
ELF machine type header to sh_types so the section header type name can
be reported correctly for the given processor.

For all ranges report the actual value for unknown types.

Add MIPS-specific type SHT_MIPS_OPTIONS.

CR: D483
Reviewed by: sbruno, marcel
Sponsored by: DARPA, AFRL

Don't dump core when the ELF file has no section headers. The ELF
core files created by gcore are among those.

Handle ELF files with 65280 or more sections

If e_shnum or e_shstrndx are at least SHN_LORESERVE (0xff00) then an
escape value is used to indicate that the actual value is found in one
of section 0's fields.

Sponsored by: DARPA, AFRL

Add missing EM_PPC64 to e_machine header display.

MFC after: 1 week

More -Wmissing-variable-declarations fixes.

In addition to adding `static' where possible:

- bin/date: Move `retval' into extern.h to make it visible to date.c.
- bin/ed: Move globally used variables into ed.h.
- sbin/camcontrol: Move `verbose' into camcontrol.h and fix shadow warnings.
- usr.bin/calendar: Remove unneeded variables.
- usr.bin/chat: Make `line' local instead of global.
- usr.bin/elfdump: Comment out unneeded function.
- usr.bin/rlogin: Use _Noreturn instead of __dead2.
- usr.bin/tset: Pull `Ospeed' into extern.h.
- usr.sbin/mfiutil: Put global variables in mfiutil.h.
- usr.sbin/pkg: Remove unused `os_corres'.
- usr.sbin/quotaon, usr.sbin/repquota: Remove unused `qfname'.

Don't extract the n_type value from the elf header, since it is never used

Fix warning when compiling with gcc46:
variable 'type' set but not used

Approved by: cperciva
MFC after: 3 days

o Use C99 designated initializer to properly handle ELFOSABI_STANDALONE.
o In elf_get_byte(), cast through uint8_t and not char to avoid sign
extension.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Teach elfdump(1) about the SUNW_dof section.

Sponsored by: The FreeBSD Foundation

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

s/DT_IA64_PLT_RESERVE/DT_IA_64_PLT_RESERVE/

Know the machines FreeBSD runs on. Print the machine value for
unknown machines.

MFC after: 1 week

Elf_Phdr.p_type 7 is "PT_TLS".

Removed another spurious semicolon forgotten in the previous commit.

Removed two spurious semicolons after function definitions.
Removed three spurious tabs on lines by themselves.

PR: bin/56492
Submitted by: Stefan Farfeleder <stefan@fafoe.narf.at>
MFC after: 6 weeks

Fix sign-extension bug for 32 and 64-bit values. For 64-bit values
this involves the sign-extension of the high and low "word". Both
of which are 32-bit. The bug is especially harmful on ia64, where
0x9fffffffe0000000 is a common address (base of register stack).
This was invariably displayed as 0xffffffffe0000000.

The sign-extension is fixed by using {b|l}e{16|32|64}dec() where
applicable. Since elfdump(1) is not a bootstrap tool, dependency
on these functions is not a problem.

Synchronize usage() and SYNOPSIS, and fix them (flags are not
optional here). Sort options. Print the file name on error.

Make WARNS=5 clean even on 64-bit platforms.

Make WARNS=5 on i386, (WARNS=1 on 64-bit platforms).

Submitted by: dwmalone (tweaked by me)

Try to tighten up the types a little bit to help debugging with GDB.

If we're going to build and install this on ia64, we might as well
teach it about ia64 specific section types, dynamic tags and machine
type. This is a mostly insignificant change given the amount of
work that this tool obviously needs...

Like sh_types, dt_tags just aren't in consecutive order, so we have to move
away from indexing into an array. Also add Sun and GNU specific tags.

The defined sh_types's just aren't in consecutive order, so we have to move
away from indexing into an array.

Add a BSDL'ed util that displays information about ELF files.
This is simular to readelf(1) and objdump(1).

Submitted by: jake