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

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

MFHead @348740

Sponsored by: The FreeBSD Foundation

powerpc/dtrace: Actually fix stack traces

Fix stack unwinding such that requesting N stack frames in lockstat will
actually give you N frames, not anywhere from 0-3 as had been before.

lockstat pri

powerpc/dtrace: Actually fix stack traces

Fix stack unwinding such that requesting N stack frames in lockstat will
actually give you N frames, not anywhere from 0-3 as had been before.

lockstat prints the mutex function instead of the caller as the reported
locker, but the stack frame is detailed enough to find the real caller.

MFC after: 2 weeks

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MFHead @347527

Sponsored by: The FreeBSD Foundation

powerpc/dtrace: Fix dtrace powerpc asm, and simplify stack walking

Fix some execution bugs in the dtrace powerpc asm. addme pulls in the carry
flag which we don't want, and the result wasn't record

powerpc/dtrace: Fix dtrace powerpc asm, and simplify stack walking

Fix some execution bugs in the dtrace powerpc asm. addme pulls in the carry
flag which we don't want, and the result wasn't recorded anyways, so the
following beq to check for exit condition wasn't checking the right
condition.

Simplify the stack walking in dtrace_isa.c, so there's only a single walker
that handles both pc and sp. This should make it easier to follow, and any
bugfix that may be needed for walking only needs to be made in one place
instead of two now.

MFC after: 2 weeks

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Merge ^/head r339015 through r339669.

powerpc/dtrace: Use explicit bit numbers to mask out PSL_EE

There seems to be a race in CI, such that dtrace_asm.S might be assembled
before the genassym is completed. This causes a build failure w

powerpc/dtrace: Use explicit bit numbers to mask out PSL_EE

There seems to be a race in CI, such that dtrace_asm.S might be assembled
before the genassym is completed. This causes a build failure when PSL_EE
doesn't exist, and is read as 0. Get around this by explicitly specifying
the bits in the mask instead.

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Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundati

Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14180

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Merge ^/head r303250 through r304235.

Two fixups for dtrace

* Use the right incantation to get the next stack pointer. Since powerpc uses
special frames for traps, dereferencing the stack pointer straight up won't
get us the next s

Two fixups for dtrace

* Use the right incantation to get the next stack pointer. Since powerpc uses
special frames for traps, dereferencing the stack pointer straight up won't
get us the next stack pointer in every case.
* Clear EE using the correct instruction sequence. The PowerISA states that
'andi.' ANDs the register with 0||<imm>, instead of sign extending or filling
out the unavailable bits with 1. Even if it did sign extend, PSL_EE is
0x8000, so ~PSL_EE is 0x7fff, and the upper bits would be cleared. Use rlwinm
in the 32-bit case, and a two-rotate sequence in the 64-bit case, the latter
chosen to follow the output generated by gcc.

MFC after: 1 week

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Catch up with HEAD (r280229-r284686).

Merge sync of head

Merge from head

MFH: r281855-r282312

Sponsored by: The FreeBSD Foundation

Fix DTrace's panic() action.

It would previously call into some unfinished Solaris compatibility code and
return without actually calling panic(9). The compatibility code is
unneeded, however, so ju

Fix DTrace's panic() action.

It would previously call into some unfinished Solaris compatibility code and
return without actually calling panic(9). The compatibility code is
unneeded, however, so just remove it and have dtrace_panic() call vpanic(9)
directly.

Differential Revision: https://reviews.freebsd.org/D2349
Reviewed by: avg
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

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Merge head r233826 through r256722.

IFC @256277

Approved by: ken (mentor)

IFC @ r255692

Comment out IA32_MISC_ENABLE MSR access - this doesn't exist on AMD.
Need to sort out how arch-specific MSRs will be handled.

Merge from head

IFC @ r255209

IFC.

Make dtrace_copy() actually work on PowerPC. Although unused currently,
it may be used in the future by dtrace.

Fix some ppc64 dtrace bugs, and enable systrace_freebsd32 for ppc64.

IFC @253398

Merge fresh head.