sys/ddb: Add hardware breakpoint support to ddb

As with hardware watchpoints add support for hardware breakpoints. The
command is only enabled on architectures that report support for them.
Currentl

sys/ddb: Add hardware breakpoint support to ddb

As with hardware watchpoints add support for hardware breakpoints. The
command is only enabled on architectures that report support for them.
Currently no architectures do, however arm64 will add support in a
future change.

Reviewed by: jhb (earlier version)
Sponsored by: Arm Ltd
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D22191

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ddb: Start to generalise breakpoints

To allow for hardware breakpoints it is useful to reuse the same
management code. Start to generalise the code by moving common data
into a new struct and pas th

ddb: Start to generalise breakpoints

To allow for hardware breakpoints it is useful to reuse the same
management code. Start to generalise the code by moving common data
into a new struct and pas this to internal functions to work with.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D44461

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sys: 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.

Remov

sys: 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

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sys: Remove $FreeBSD$: one-line .c pattern

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

ddb: Remove SOFTWARE_SSTEP support

It was needed for mips only, and only kinda sorta worked for mips. It
can be brought back if we grow another architecture that need it.

Sponsored by: Netflix

ddb: clean up empty lines in .c and .h files

SPDX: Consider code from Carnegie-Mellon University.

Interesting cases, most likely from CMU Mach sources.

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head

ddb: finish converting boolean values.

The replacement started at r283088 was necessarily incomplete without
replacing boolean_t with bool. This also involved cleaning some type
mismatches and ansi

ddb: finish converting boolean values.

The replacement started at r283088 was necessarily incomplete without
replacing boolean_t with bool. This also involved cleaning some type
mismatches and ansifying old C function declarations.

Pointed out by: bde
Discussed with: bde, ian, jhb

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ddb: stop boolean screaming.

TRUE --> true
FALSE--> false

Hinted by: NetBSD

Merge from head@274682

Sync to HEAD@r274095.

Reintegrate head@r273095

Sponsored by: The FreeBSD Foundation

IFC @r273066

ddb: ANSI-fy function declarations.

MFC after: 5 days

ddb: space/tab fixes.

No functional change.

MFC after: 3 days

IFC @ r225592

sys/dev/bvm/bvm_console.c - move up to the new alt-break order.

Integrate from head at r225316.

Follow up to r225203 refining break-to-debugger run-time configuration
improvements:

(1) Implement new model in previously missed at91 UART driver
(2) Move BREAK_TO_DEBUGGER and ALT_BREAK_TO_DEBUGGE

Follow up to r225203 refining break-to-debugger run-time configuration
improvements:

(1) Implement new model in previously missed at91 UART driver
(2) Move BREAK_TO_DEBUGGER and ALT_BREAK_TO_DEBUGGER from opt_comconsole.h
to opt_kdb.h (spotted by np)
(3) Garbage collect now-unused opt_comconsole.h

MFC after: 3 weeks
Approved by: re (bz)

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Start each of the license/copyright comments with /*-

Mega update for the KDB framework: turn DDB into a KDB backend.
Most of the changes are a direct result of adding thread awareness.
Typically, DDB_REGS is gone. All registers are taken from the
trapf

Mega update for the KDB framework: turn DDB into a KDB backend.
Most of the changes are a direct result of adding thread awareness.
Typically, DDB_REGS is gone. All registers are taken from the
trapframe and backtraces use the PCB based contexts. DDB_REGS was
defined to be a trapframe on all platforms anyway.
Thread awareness introduces the following new commands:
thread X switch to thread X (where X is the TID),
show threads list all threads.

The backtrace code has been made more flexible so that one can
create backtraces for any thread by giving the thread ID as an
argument to trace.

With this change, ia64 has support for breakpoints.

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Use __FBSDID().

Add /* FALLTHROUGH */
Found by: FlexeLint