sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

riscv: improve exception code naming

The existing names were inherited from arm64, but we should prefer
RISC-V terminology. Change the prefix to SCAUSE, and further change the
names to better match

riscv: improve exception code naming

The existing names were inherited from arm64, but we should prefer
RISC-V terminology. Change the prefix to SCAUSE, and further change the
names to better match the RISC-V spec and be more consistent with one
another. Also, remove two codes that are not defined for S-mode (machine
and hypervisor ecall).

While here, apply style(9) to some condition checks.

Reviewed by: kp
Discussed with: jrtc27
Differential Revision: https://reviews.freebsd.org/D26918

show more ...

Merge ^/head r357408 through r357661.

Read the breakpoint instruction to determine its length in BKPT_SKIP.

This fixes continuing from debug.kdb.enter=1 after enabling the use of
compressed instructions since the compiler can emit the t

Read the breakpoint instruction to determine its length in BKPT_SKIP.

This fixes continuing from debug.kdb.enter=1 after enabling the use of
compressed instructions since the compiler can emit the two byte
c.ebreak instead of the 4 byte ebreak.

Reviewed by: br
MFC after: 1 week
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D23507

show more ...

Merge ^/head r357270 through r357349.

Remove unused fields from struct pcb.

cpu_switch/throw() and savectx() do not save or restore any values in
these fields which mostly held non-callee-save registers.

makectx() copied these fields f

Remove unused fields from struct pcb.

cpu_switch/throw() and savectx() do not save or restore any values in
these fields which mostly held non-callee-save registers.

makectx() copied these fields from kdb_frame, but they weren't used
except for PC_REGS using pcb_sepc. Change PC_REGS to use
kdb_frame->tf_sepc directly instead.

Reviewed by: br
MFC after: 2 weeks
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D23395

show more ...

Fix printing of negative offsets (typically from frame pointers) again.
I fixed this in 1997, but the fix was over-engineered and fragile and
was broken in 2003 if not before. i386 parameters were c

Fix printing of negative offsets (typically from frame pointers) again.
I fixed this in 1997, but the fix was over-engineered and fragile and
was broken in 2003 if not before. i386 parameters were copied to 8
other arches verbatim, mostly after they stopped working on i386, and
mostly without the large comment saying how the values were chosen on
i386. powerpc has a non-verbatim copy which just changes the uncritical
parameter and seems to add a sign extension bug to it.

Just treat negative offsets as offsets if they are no more negative than
-db_offset_max (default -64K), and remove all the broken parameters.

-64K is not very negative, but it is enough for frame and stack pointer
offsets since kernel stacks are small.

The over-engineering was mainly to go more negative than -64K for the
negative offset format, without affecting printing for more than a
single address.

Addresses in the top 64K of a (full 32-bit or 64-bit) address space
are now printed less well, but there aren't many interesting ones.
For arches that have many interesting ones very near the top (e.g.,
68k has interrupt vectors there), there would be no good limit for
the negative offset format and -64K is a good as anything.

show more ...

Merge ^/head r303250 through r304235.

Update RISC-V port to Privileged Architecture Version 1.9.

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

MFH

Sponsored by: The FreeBSD Foundation

Add support for ddb(4).

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation

Import RISC-V machine headers. This is a minimal set required to compile
kernel and userland.

Reviewed by: andrew, imp, kib
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https

Import RISC-V machine headers. This is a minimal set required to compile
kernel and userland.

Reviewed by: andrew, imp, kib
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D4554

show more ...