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

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

MFhead@r344527

Merge ^/head r344178 through r344512.

Restore syscons' terminal emulators. The trivial fixes to make them compile
will be committed later.

The "sc" emulator has the advantages of full support for cons25 and running
about 8 times faster

Restore syscons' terminal emulators. The trivial fixes to make them compile
will be committed later.

The "sc" emulator has the advantages of full support for cons25 and running
about 8 times faster than teken (for writing to the frame buffer).

The "dumb" emulator has the advantage of being simple.

Runtime choice of the emulator is good, but compile time choice is bad.

show more ...

Do not try to work around ``poor (un)sign extension code''
creation by GCC-2.6.3. Casting pointers to unsigned char
to volatile pointers to unsigned char seemed to produce
better results on the ia32

Do not try to work around ``poor (un)sign extension code''
creation by GCC-2.6.3. Casting pointers to unsigned char
to volatile pointers to unsigned char seemed to produce
better results on the ia32 architecture with old versions
of GCC.
The current FreeBSD system compiler GCC-3.2.1 emits
better sign extension code for non-volatile variables:

volatile char c;
int i = c;

is compiled to:
...
movb -1(%ebp), %al
movbsl %al, %eax
movl %eax, -8(%ebp)
...

char c;
int i = c;

is compiled to:
...
movbsl -1(%ebp), %eax
movl %eax, -8(%ebp)
...

The same holds for zero-extension of dereferenced pointers
to volatile unsigned char.
When compiled on alpha or sparc64, the code produced for the
two examples above does not differ.

show more ...

Fix off by one error for ESC[1J.

PR: kern/18381
MFC after: 10 days

Fix the TAB not cause scrolling when entered at the end of the last line.
It may cause misterious chars appearse in the middle of the scrolled lines.

The bug trigger: enter
grep P_32 /usr/include/*.

Fix the TAB not cause scrolling when entered at the end of the last line.
It may cause misterious chars appearse in the middle of the scrolled lines.

The bug trigger: enter
grep P_32 /usr/include/*.h
command and see misterious "db.\" filename.

show more ...

This is the 3rd stage of syscons code reorganization.

- Split terminal emulation code from the main part of the driver so
that we can have alternative terminal emulator modules if we like in
the fut

This is the 3rd stage of syscons code reorganization.

- Split terminal emulation code from the main part of the driver so
that we can have alternative terminal emulator modules if we like in
the future. (We are not quite there yet, though.)

- Put sysmouse related code in a separate file, thus, simplifying the
main part of the driver.

As some files are added to the source tree, you need to run config(8)
before you compile a new kernel next time.

You shouldn't see any functional change by this commit; this is only
internal code reorganization.

show more ...

Do not try to work around ``poor (un)sign extension code''
creation by GCC-2.6.3. Casting pointers to unsigned char
to volatile pointers to unsigned char seemed to produce
better results on the ia32

Do not try to work around ``poor (un)sign extension code''
creation by GCC-2.6.3. Casting pointers to unsigned char
to volatile pointers to unsigned char seemed to produce
better results on the ia32 architecture with old versions
of GCC.
The current FreeBSD system compiler GCC-3.2.1 emits
better sign extension code for non-volatile variables:

volatile char c;
int i = c;

is compiled to:
...
movb -1(%ebp), %al
movbsl %al, %eax
movl %eax, -8(%ebp)
...

char c;
int i = c;

is compiled to:
...
movbsl -1(%ebp), %eax
movl %eax, -8(%ebp)
...

The same holds for zero-extension of dereferenced pointers
to volatile unsigned char.
When compiled on alpha or sparc64, the code produced for the
two examples above does not differ.

show more ...

Fix off by one error for ESC[1J.

PR: kern/18381
MFC after: 10 days

Fix the TAB not cause scrolling when entered at the end of the last line.
It may cause misterious chars appearse in the middle of the scrolled lines.

The bug trigger: enter
grep P_32 /usr/include/*.

Fix the TAB not cause scrolling when entered at the end of the last line.
It may cause misterious chars appearse in the middle of the scrolled lines.

The bug trigger: enter
grep P_32 /usr/include/*.h
command and see misterious "db.\" filename.

show more ...

This is the 3rd stage of syscons code reorganization.

- Split terminal emulation code from the main part of the driver so
that we can have alternative terminal emulator modules if we like in
the fut

This is the 3rd stage of syscons code reorganization.

- Split terminal emulation code from the main part of the driver so
that we can have alternative terminal emulator modules if we like in
the future. (We are not quite there yet, though.)

- Put sysmouse related code in a separate file, thus, simplifying the
main part of the driver.

As some files are added to the source tree, you need to run config(8)
before you compile a new kernel next time.

You shouldn't see any functional change by this commit; this is only
internal code reorganization.

show more ...