Fixing the bound of a debug buffer in SGX PAL
Rewrite bytes2hexstr; Add two new macros, alloca_bytes2hexstr() and malloc_bytes2hexstr().
Remove HASHBUF_SIZE
Add comments for the bytes2hexstr() macros.
Add a compile-time assertion
1. Redesign of the VMA bookkeeping logic in the library OS
2. ASLR reimplementation
3. Support MAP_32BITS flags for mmap()
4. Safeguarding library OS internal memory from user memory and checkpoint buffers
5. Eliminating race conditions at VMA lookup and bookkeeping
6. Enable early VMA bookkeeping during initialization
7. Adding documentation for the VMA implementation
* Several memory allocation fixes, primarily motivated by the fact that the Diffie-Hellman implementation in mbedtls is sensitive to misaligned allocations. All malloc's are now 16-byte aligned. This PR has several other points where remalloc was used instead of realloc, or memory needed to be zeroed upon allocation. Finally, this PR also standardizes the definition of assert across layers, so that code in the lib directory can both use assertions and link properly in the PAL and shim.
Isaku Yamahata