arm64: Support SVE in ptrace and core dumps

Add the NT_ARM_SVE note type and use it to access the SVE registers
from ptrace. This allows userspace to modify the full SVE register
values.

Try to fol

arm64: Support SVE in ptrace and core dumps

Add the NT_ARM_SVE note type and use it to access the SVE registers
from ptrace. This allows userspace to modify the full SVE register
values.

Try to follow the Linux semantics to allow debuggers to use this with
minimal changes.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D43309

show more ...

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

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

arm64 lib32: prepare arm64 headers to redirect to arm

In order to compile lib32 libraries and other 32-bit code on arm64,
<machine/foo.h> needs to be redirected to an arm header rather
than arm64 wh

arm64 lib32: prepare arm64 headers to redirect to arm

In order to compile lib32 libraries and other 32-bit code on arm64,
<machine/foo.h> needs to be redirected to an arm header rather
than arm64 when building with -m32. Ifdef the arm64 headers that
are installed in /usr/include/machine and used by user-level software
(including references from /usr/include/*.h) so that if __arm__ is
defined when including the arm64 version, <arm/foo.h> is included
rather than using the rest of the file's contents. Some arm headers
had no arm64 equivalent; headers were added just to do the redirection.
These files use #error if __arm__ is not defined to guard against
confusion. Also add an include/arm Makefile, and modify Makefiles
as needed to install everything, including the arm files in
/usr/include/arm. fenv.h comes from lib/msun/arm/fenv.h.

The new arm64 headers are:
acle-compat.h
cpuinfo.h
sysreg.h

Reviewed by: jrtc27, imp
Differential Revision: https://reviews.freebsd.org/D40944

show more ...

arm64: extend ESR/SPSR registers to 64b

For the Exception Syndrome Register, ESR_ELx, the upper 32b were
previously unused, but now may contain additional exception info as of
Armv8.7 (FEAT_LS64).

arm64: extend ESR/SPSR registers to 64b

For the Exception Syndrome Register, ESR_ELx, the upper 32b were
previously unused, but now may contain additional exception info as of
Armv8.7 (FEAT_LS64).

Extend ESR from u32->u64 in exception handling code to support this. In
addition, also extend Saved Program Status Register SPSR_ELx in the same
way to allow for future extensions.

Reviewed by: andrew
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D38983

show more ...

Add NT_ARM_ADDR_MASK

This can be used by debuggers to find which bits in a virtual address
should be masked off to get a canonical address. This is currently used
by the Pointer Authentication Code

Add NT_ARM_ADDR_MASK

This can be used by debuggers to find which bits in a virtual address
should be masked off to get a canonical address. This is currently used
by the Pointer Authentication Code support to get its mask. It could also
be used if we support Top Byte Ignore for the same purpose.

Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D34302

show more ...

arm64: Make machine/reg.h self contained

Make sys/reg.h includable on aarch64 by making machine/reg.h
self-contained: Include sys/_types.h and use __uint* instead of uint*.

Sponsored by: Netflix

Create sys/reg.h for the common code previously in machine/reg.h

Move the common kernel function signatures from machine/reg.h to a new
sys/reg.h. This is in preperation for adding PT_GETREGSET to p

Create sys/reg.h for the common code previously in machine/reg.h

Move the common kernel function signatures from machine/reg.h to a new
sys/reg.h. This is in preperation for adding PT_GETREGSET to ptrace(2).

Reviewed by: imp, markj
Sponsored by: DARPA, AFRL (original work)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19830

show more ...

arm64: extend struct db_reg to include watchpoint registers

The motivation is to provide access to these registers from userspace
via ptrace(2) requests PT_GETDBREGS and PT_SETDBREGS.

This change b

arm64: extend struct db_reg to include watchpoint registers

The motivation is to provide access to these registers from userspace
via ptrace(2) requests PT_GETDBREGS and PT_SETDBREGS.

This change breaks the ABI of these particular requests, but is
justified by the fact that the intended consumers (debuggers) have not
been taught to use them yet. Making this change now enables active
upstream work on lldb to begin using this interface, and take advantage
of the hardware debugging registers available on the platform.

PR: 252860
Reported by: Michał Górny (mgorny@gentoo.org)
Reviewed by: andrew, markj (earlier version)
Tested by: Michał Górny (mgorny@gentoo.org)
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28415

show more ...

Add support for setting hardware breakpoints from ptrace on arm64.

Implement get/fill_dbregs on arm64. This is used by ptrace with the
PT_GETDBREGS and PT_SETDBREGS requests. It allows userspace to

Add support for setting hardware breakpoints from ptrace on arm64.

Implement get/fill_dbregs on arm64. This is used by ptrace with the
PT_GETDBREGS and PT_SETDBREGS requests. It allows userspace to set hardware
breakpoints.

The struct dbreg is based on Linux to ease adding hardware breakpoint
support to debuggers.

Reviewed by: jhb
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D22195

show more ...

Impleent COMPAT_FREEBSD32 for arm64.
This is based on early work by andrew@.

Add rudimentary support for building FreeBSD/arm64 with COMPAT_FREEBSD32.

Right now I'm using two Raspberry Pi's (2 and 3) to test CloudABI
support for armv6, armv7 and aarch64. It would be nice if

Add rudimentary support for building FreeBSD/arm64 with COMPAT_FREEBSD32.

Right now I'm using two Raspberry Pi's (2 and 3) to test CloudABI
support for armv6, armv7 and aarch64. It would be nice if I could
restrict this to just a single instance when testing smaller changes.
This is why I'd like to get COMPAT_CLOUDABI32 to work on arm64.

As COMPAT_CLOUDABI32 depends on COMPAT_FREEBSD32, at least for the ELF
loading, this change adds all of the bits necessary to at least build a
kernel with COMPAT_FREEBSD32. All of the machine dependent system calls
are still stubbed out, for the reason that implementations for these are
only useful if actual support for running FreeBSD binaries is added.
This is outside the scope of this work.

Reviewed by: andrew
Differential Revision: https://reviews.freebsd.org/D13144

show more ...

Catch up with HEAD (r280229-r284686).

Merge sync of head

MFH: r280643-r281852

Sponsored by: The FreeBSD Foundation

Merge from HEAD

Add more arm64 machine dependent headers. With this we now have the minimum
set of machine headers needed to build the userland toolchain.

Differential Revision: https://reviews.freebsd.org/D2148
Re

Add more arm64 machine dependent headers. With this we now have the minimum
set of machine headers needed to build the userland toolchain.

Differential Revision: https://reviews.freebsd.org/D2148
Reviewed by: imp
Sponsored by: The FreeBSD Foundation

show more ...