Correct a security bug in copyuvm()

copyuvm() should not allow new copied pages to inherit more
permissions than the original pages.

Prevent extra rebuild of fs.img by keeping intermediate object files.

Use static assert instead of _LP64 (thanks Eddie!)

Remove -m32 flag from native gcc compiler
But check that mkfs.c is building with LP64

make the book happy

nits

junk

Various fixes and improvements to printpcs

Search for an addr2line that supports elf32-i386. Don't print the
path of addr2line as a side-effect of which. Don't uselessly pipe
"grep '^ '" to addr2l

Various fixes and improvements to printpcs

Search for an addr2line that supports elf32-i386. Don't print the
path of addr2line as a side-effect of which. Don't uselessly pipe
"grep '^ '" to addr2line's stdin. Enable as many pretty-printing and
otherwise helpful options as possible (this makes the output *much*
more pleasant on modern addr2lines).

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For the convenience of students

Use addr2line (or i386-jos-elf-addr2line, if you cross compile)

Runoff still complaints these lines are too long, but it is now ok on printout

chmod +x

Decode getcallerpcs() (thanks to Peter Froehlich)

Remove left-over from some logging plan making complete syscalls atomic
0 is not a system call (thanks to Peter Froehlich)

Remove unused argument to setupkvm (thanks to Peter Froehlich)

Remove unused argument from lapicinit (thanks to Peter Froehlich)

Fix from Peter Froehlich

Make fetchint and fetchstr use proc instead of taking a struct proc

Previously, these were inconsistent: they used their struct proc
argument for bounds checking, but always copied the argument from

Make fetchint and fetchstr use proc instead of taking a struct proc

Previously, these were inconsistent: they used their struct proc
argument for bounds checking, but always copied the argument from the
current address space (and hence the current process). Drop the
struct proc argument and always use the current proc.

Suggested by Carmi Merimovich.

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don't let dirty blocks be evicted from cache!

more FS comment clarification

clarify some FS comments

Fix compile error on newer gcc's

Update stressfs to trigger race now the logging code serializes writes

Use | instead of + for entrypgdir. Linker doesn't get in our way here.

eliminate enter_alloc -- use kalloc for everything