64 bit types with varargs on ARM
- From: Justin Cormack <justin@xxxxxxxxxxxxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Sun, 12 Aug 2012 20:25:40 +0100
The following program works fine on x86 and x64 but on ARM strace
shows issues with the last value:
local ffi = require "ffi"
ffi.cdef [[
int syscall(int number, ...);
]]
local int = ffi.typeof("int")
local uint = ffi.typeof("unsigned int")
local loff = ffi.typeof("uint64_t")
local fa = {
arm = 352,
x86 = 324,
x64 = 285,
}
local function fallocate(fd, mode, offset, len)
return ffi.C.syscall(fa[ffi.arch], int(fd), uint(0), loff(offset), loff(len))
end
fallocate(0, 0, 0, 4096)
strace on ARM - last argument huge,
fallocate(0, 0, 0, 17592186044416) = -1 ENODEV (No such device)
strace on x86 - as expected
fallocate(0, 0, 0, 4096) = -1 ENODEV (No such device)
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