wolfgang keller

Fix spelling Gaoron.

Thanks to Wolfgang Keller <nubok@users.noreply.github.com>

Thanks to Wolfgang Keller <nubok@users.noreply.github.com>

Add support for qemu-system-x86_64 in 64bit hosts

As x86-64 is a superset of x86, we can use qemu-system-x86_64 to run
the OS image.

Signed-off-by: Antonio Gutierrez <chibby0ne@gmail.com>

Thanks to Jeehoon Kang <jeehoon.kang@sf.snu.ac.kr>

Fix long-standing switchuvm() inconsistency.

switchuvm() is supposed to switch the TSS and page table to the
process p it is passed. Alas, instead of using p to access the
kstack field, it used the

Fix long-standing switchuvm() inconsistency.

switchuvm() is supposed to switch the TSS and page table to the
process p it is passed. Alas, instead of using p to access the
kstack field, it used the global proc. This worked fine because
(a) most uses of switchuvm() pass proc anyway and (b) because in
the schedule, where we call switchuvm with the newly scheduled
process, we actually set the global proc before the call. But I
think it's still a bug, even if it never broke a test case. :-)

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Fix unsigned conversion bug.

Since readi() returns -1 for errors, checking with < against an unsigned
value is inadvisable. Checking with != works as intended however.

Cody

fix possible memory leak in deallocuvm

when a zero PDE is encountered while searching for present PTEs to free,
resume searching at first entry of the next page table instead of the
current entry of

fix possible memory leak in deallocuvm

when a zero PDE is encountered while searching for present PTEs to free,
resume searching at first entry of the next page table instead of the
current entry of the next page table.

show more ...

Fixed broken build on newer gold linker with NaCl support

On platforms with NaCl support, ld.gold -V will return a "elf_i386_nacl" in
addition to "elf_i386", which will make the build fail.

Add mikecat's argp test

fix memory region validation in argptr()

Typo (Thanks to Austin Liew)

Check result of write (thans to Alexander Kapshuk <alexander.kapshuk@gmail)

Fix a small README typo

Remove left-over print statements

change allocproc() back to acquiring the ptable.lock.
fix bugs where caller incorrectly released lock on error return path.

xx

Delete two left-over print statements

Update comment a bit.

Add sleeplock.[ch] to listing

one more BUSY

sleeplock files

Replace I_BUSY with sleep locks