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the "to" address can overflow in syssegfree() causing wrong
number of pages to be passed to mfreeseg(). with the current
implementation of mfreeseg() however, this doesnt cause any
data corruption but was just freeing an unexpected number of
pages.
this change checks for this condition in syssegfree() and
errors out instead. also mfreeseg() was changed to take
ulong argument for number of pages instead of int to keep
it consistent with other routines that work with page counts.
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sdbio() tests if it can pass the buffer pointer directly to
the driver when it is already in kernel memory. we also need
to check if the buffer is properly aligned but alignment
requirement is handled in system specific sdmalloc() and
was not known to devsd.
to solve this, we *always* page align sd buffers and get rid
of the system specific sdmalloc() macro (was only used in bcm
kernel).
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chaninit() does not initialize Chan.qentry and Chan.nentry
and there is no way to get rid of such a channel. nobody is
using it, so removing the function to avoid confusion.
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ignore physical segments in mcountseg() and mfreeseg(). physical
segments are not backed by user pages, and doing putpage() on
physical segment pages in mfreeseg() is an error.
do now allow physical segemnts to be resized. the segment size
is only checked in segattach() to be within the physical segment!
ignore physical segments in portcountpagerefs() as pagenumber()
does not work on the malloced page structures of a physical segment.
get rid of Physseg.pgalloc() and Physseg.pgfree() indirection as
this was never used and if theres a need to do more efficient
allocation, it should be done in a portable way.
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code, malloc erros
it is possible to have fonts belong to different or no display, so the
check for defaultsubfont has to be against font->display, not the global
display variable.
remove unused freeup() routine.
handle strdup() error in allocsubfont() and realloc() error in buildfont().
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- remove secstore password code, it is not used anymore.
- zero the Nvrsafe structure on the stack before returning.
- use smprint(), can't overflow.
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font files might be bigger than the i/o unit, so do multiple reads
until eof to read it.
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the Fontchar array might be bigger than the i/o unit,
so we have to use readn() to properly read it.
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close-on-exec in procexec()
the namespace might be shared by other processes. instead, we
create a anonymous pipe with pipe() and use devdup to open one
end close-on-exec. this is shorter and avoids the race condition.
do not touch Execargs after writing the error message as the
process might be gone after the write. this was to manually
close the fd which isnt neccesary as the kernel will do it
for us on the following exit.
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blockgrow() and poolallocalign() change the size of
allocated blocks which needs to be accounted for
in Pool.curalloc.
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reporting)
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qemu does not send e0 escape for gray (arrow) keys, no matter
the numlock state. as a work arround, we assume gray key when
numlock is not active.
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the httpproxy environment variable needs to be a url as stated
in the manpage, so give an error when it isnt.
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rebuilding the xref table does not work for pdfs with
compressed object streams. as a work arround, we skip
xref table verification and ignore wrong xref gen #
for gen 0 objects.
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convert:
x = B || W
MOVxLZX a, r; MOVxQZX r, b -> MOVxQZX a, r; MOVQ r, b
MOVxLSX a, r; MOVxQSX r, r -> MOVxQSX a, r; MOVQ r, r
the MOVQ can then be eleminated by copy propagation.
improve subprop() by accepting other mov and lea
instructions as the source op.
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as with 32 bit operand size, the upper bits 63:32 are
automatically zeroed in 64bit mode. this gives a shoter
instruction encoding.
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tlsServer() closes the passed in fd, in our case fd=1 leaving it
with no std output which got occupied by pipe() filedescriptor
which it then closed after duping... a classic.
delete all this mess. theres no reason to fork() and copy traffic
on a pipe at all as tlsServer() gives us a perfectly valid filedescriptor.
just dup() and exec() and we'r done.
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