Many device drivers that manipulate hardware devices use C data structures to describe the layout of the hardware. In the LP64 data model, data structures that use long
or unsigned long to define hardware registers are almost certainly incorrect, because long
is now a 64-bit
quantity. Start by including <sys/inttypes.h>, and update this class of data structure to use int32_t
or uint32_t
instead of long
for 32-bit device data. This preserves the binary layout of 32-bit data structures. For example, change:
struct device_regs { ulong_t addr; uint_t count; }; /* Only works for ILP32 compilation */
to:
struct device_regs { uint32_t addr; uint32_t count; }; /* Works for any data model */