blob: 62565b1e17773a0c47bf136f68d8484271830a97 [file] [log] [blame]
# Copyright 2019 The Fuchsia Authors
#
# Use of this source code is governed by a MIT-style
# license that can be found in the LICENSE file or at
# https://opensource.org/licenses/MIT
import("//build/toolchain/toolchain_environment.gni")
import("//build/zircon/zx_library.gni")
# These set the ABI contract between C++ and assembly code.
# This is kept consistent between the kernel proper and phys
# so (pure PIC) code should be callable from the kernel proper.
config("abi") {
cflags = [
"-mno-red-zone",
# context switch routines conditionally use these instructions.
"-mfsgsbase",
# Hard disable floating point in the kernel.
"-msoft-float",
"-mno-mmx",
"-mno-sse",
"-mno-sse2",
"-mno-3dnow",
"-mno-avx",
"-mno-avx2",
]
if (is_gcc) {
cflags += [
# Optimization: Since FPU is disabled, do not pass flag in %rax to
# varargs routines that floating point args are in use.
"-mskip-rax-setup",
]
} else {
# Clang needs -mcmodel=kernel to tell it to use the right safe-stack
# ABI for the kernel.
cflags += [ "-mcmodel=kernel" ]
}
# This is not part of the ABI contract per se, but it's part of the
# "expected resilience of generated code" contract that should be uniform
# across all the privileged code.
configs = [
":retpoline",
":skylake_jcc",
]
}
config("retpoline") {
visibility = [ ":*" ]
if (is_gcc) {
cflags = [
"-mindirect-branch=thunk-inline",
"-mindirect-branch-register",
]
} else {
cflags = [ "-mretpoline" ]
if (toolchain_environment == "kernel") {
# The kernel proper uses its own optimized thunks, but phys and
# multiboot can just use the compiler's safe default thunks.
cflags += [ "-mretpoline-external-thunk" ]
}
}
defines = [ "KERNEL_RETPOLINE=1" ]
}
# Mitigate errata in Intel Skylake family of CPUs that cause control transfer instructions to
# execute incorrectly when they end at or cross 32-byte boundaries. (fxbug.dev/44204)
config("skylake_jcc") {
visibility = [ ":*" ]
defines = [ "X64_KERNEL_JCC_WORKAROUND" ]
configs = [ "//build/config/x64:mitigate_skylake_jcc" ]
}
# This is used pervasively throughout the kernel on x86.
config("kernel") {
defines = [
"ARCH_X86",
"KERNEL_LOAD_OFFSET=0x00100000", # 1MB
]
# For #include <arch/foo.h>.
include_dirs = [ "include" ]
# TODO(digit): Once the dependencies below have been migrated to the Fuchsia
# build, only use configs to add the include paths.
include_dirs += [
# <arch/aspace.h> has #include <bitmap/rle-bitmap.h>
"//zircon/system/ulib/bitmap/include",
# <arch/aspace.h> has #include <arch/x86/page_tables/constants.h>.
"page_tables/include",
# <arch/x86/page_tables/page_tables.h> has #include <hwreg/bitfields.h>.
"//zircon/system/ulib/hwreg/include",
# <arch/x86/page_tables/page_tables.h> has #include <page_tables/x86/constants.h>.
"//zircon/system/ulib/page_tables/include",
# <arch/x86/idle_states.h> has #include <ktl/atomic.h>.
"//zircon/kernel/lib/ktl/include",
# <arch/x86.h> has #include <lib/arch/intrin.h>.
"//zircon/kernel/lib/arch/x86/include",
]
}
# TODO(fxbug.dev/58463): Remove conditional when all dependencies below have been
# migrated to the Fuchsia build.
# NOTE: Bad indentation is intentional, to make code reviews easier.
zx_library("x86") {
sources = [
"amd.cc",
"arch.cc",
"asm.S",
"bootstrap16.cc",
"cache.cc",
"debugger.cc",
"descriptor.cc",
"exceptions.S",
"faults.cc",
"feature.cc",
"gdt.S",
"hwp.cc",
"idle_states.cc",
"idt.cc",
"intel.cc",
"ioapic.cc",
"ioport.cc",
"lapic.cc",
"mexec.S",
"mmu.cc",
"mmu_mem_types.cc",
"mp.cc",
"msr.cc",
"ops.S",
"perf_mon.cc",
"proc_trace.cc",
"pv.cc",
"registers.cc",
"smp.cc",
"spinlock.cc",
"start.S",
"start16.S",
"system_topology.cc",
"thread.cc",
"timer_freq.cc",
"uspace_entry.S",
]
deps = [
":dev-init",
":syscall",
":tests",
"code-patches:headers",
"cpuid",
"retpoline",
"user-copy",
"//sdk/lib/fit",
"//zircon/kernel/dev/hw_rng",
"//zircon/kernel/dev/iommu/dummy",
"//zircon/kernel/dev/iommu/intel",
"//zircon/kernel/lib/acpi_lite",
"//zircon/kernel/lib/arch",
"//zircon/kernel/lib/backtrace",
"//zircon/kernel/lib/boot-options",
"//zircon/kernel/lib/code-patching:headers",
"//zircon/kernel/lib/console",
"//zircon/kernel/lib/counters",
"//zircon/kernel/lib/crashlog",
"//zircon/kernel/lib/debuglog",
"//zircon/kernel/lib/fbl",
"//zircon/kernel/lib/init",
"//zircon/kernel/lib/instrumentation",
"//zircon/kernel/lib/kpci",
"//zircon/kernel/lib/ktrace",
"//zircon/kernel/lib/perfmon",
"//zircon/kernel/lib/root_resource_filter",
"//zircon/kernel/lib/topology",
"//zircon/kernel/lib/version",
"//zircon/kernel/object",
"//zircon/kernel/phys:handoff",
"//zircon/kernel/phys:handoff",
"//zircon/kernel/platform/pc",
"//zircon/system/ulib/bitmap",
"//zircon/system/ulib/pretty",
]
public_deps = [
# arch/x86/system_topology.h has #include <arch/x86/cpuid.h>.
"//zircon/kernel/arch/x86/cpuid:headers",
# arch/x86/apic.h has #include <dev/interrupt.h>.
"//zircon/kernel/dev/interrupt:headers",
# arch/x86/hypervisor.h has #include <hypervisor/guest_physical_address_space.h>.
"//zircon/kernel/hypervisor:headers",
# <arch/aspace.h> has #include <bitmap/rle-bitmap.h>.
"//zircon/system/ulib/bitmap:headers",
# <arch/aspace.h> uses various fbl things
"//zircon/system/ulib/fbl:headers",
# <arch/x86/ioport.h> has #include <bitmap/rle-bitmap.h>.
"//zircon/system/ulib/bitmap:headers",
# <arch/x86/apic.h> has #include <dev/interrupt.h>.
"//zircon/kernel/dev/interrupt:headers",
# <arch/x86/idle_states.h> has #include <ktl/atomic.h>.
"//zircon/kernel/lib/ktl:headers",
# <arch/x86.h> has #include <lib/arch/intrin.h>.
"//zircon/kernel/lib/arch:headers",
# <arch/x86/system_topology.h> has #include <lib/acpi_lite.h>.
"//zircon/kernel/lib/acpi_lite:headers",
]
}
source_set("syscall") {
sources = [ "syscall.S" ]
deps = [
"code-patches:headers",
"//zircon/kernel/lib/code-patching:headers",
"//zircon/kernel/lib/syscalls",
]
}
source_set("dev-init") {
visibility = [ ":*" ]
sources = [ "dev-init.cc" ]
deps = [
"//zircon/kernel/phys:handoff",
"//zircon/kernel/platform/pc",
"//zircon/system/ulib/uart",
]
}
source_set("tests") {
sources = [
"hwp_tests.cc",
"idle_states_test.cc",
"mmu_tests.cc",
"platform_tests.cc",
"system_topology_test.cc",
]
deps = [
":headers",
"//zircon/kernel/lib/arch/testing",
"//zircon/kernel/lib/boot-options",
"//zircon/kernel/lib/console:headers",
"//zircon/kernel/lib/topology:headers",
"//zircon/kernel/lib/unittest",
]
}