tree a9bf139467269eb8a87fa2bb3423259eb59903e3
parent 7a34dd3495d4bcd3dadc8b9fe2c89f819c15e7fd
author Szabolcs Nagy <nsz@port70.net> 1379210432 +0000
committer Szabolcs Nagy <nsz@port70.net> 1379210432 +0000

support configurable page size on mips, powerpc and microblaze

PAGE_SIZE was hardcoded to 4096, which is historically what most
systems use, but on several archs it is a kernel config parameter,
user space can only know it at execution time from the aux vector.

PAGE_SIZE and PAGESIZE are not defined on archs where page size is
a runtime parameter, applications should use sysconf(_SC_PAGE_SIZE)
to query it. Internally libc code defines PAGE_SIZE to libc.page_size,
which is set to aux[AT_PAGESZ] in __init_libc and early in __dynlink
as well. (Note that libc.page_size can be accessed without GOT, ie.
before relocations are done)

Some fpathconf settings are hardcoded to 4096, these should be actually
queried from the filesystem using statfs.