Other architectures are documented in terms of the name that is displayed by
'uname -p', aka MACHINE_ARCH and TARGET_ARCH in the build system, now
aarch64 matches the rest of them.
PR: 220297
Compilers may define multiple variants of architecture-specific macros
(for example, both __x86_64 and __x86_64__). Add a note that the macros
documented in arch.7 are the preferred ones for FreeBSD.
Sponsored by: The FreeBSD Foundation
Remove all the details about armeb from arch(7), except for its
release start and end, like alpha, ia64 and pc98.
Differential Revision: https://reviews.freebsd.org/D16257
o Replace __riscv64 with (__riscv && __riscv_xlen == 64)
This is required to support new GCC 7.1 compiler.
This is compatible with current GCC 6.1 compiler.
RISC-V is extensible ISA and the idea here is to have built-in define
per each extension, so together with __riscv we will have some subset
of these as well (depending on -march string passed to compiler):
__riscv_compressed
__riscv_atomic
__riscv_mul
__riscv_div
__riscv_muldiv
__riscv_fdiv
__riscv_fsqrt
__riscv_float_abi_soft
__riscv_float_abi_single
__riscv_float_abi_double
__riscv_cmodel_medlow
__riscv_cmodel_medany
__riscv_cmodel_pic
__riscv_xlen
Reviewed by: ngie
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D11901
AKA Make time_t 64 bits on powerpc(32).
PowerPC currently (until now) was one of two architectures with a 32-bit time_t
on 32-bit archs (the other being i386). This is an ABI breakage, so all ports,
and all local binaries, *must* be recompiled.
Tested by: andreast, others
MFC after: Never
Relnotes: Yes
Start with some words about linear address space and its layout, then
explain pointers models and ABIs, providing explanation to the
structure of the tables.
Reviewed by: emaste, imp
'Future-proof' cheri wording by: brooks
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D10596
