Introduce armv9-a arch variant.

Armv9 with mandatory PAC and BTI extensions.
Stack protector is disabled as it is irrelevant with PAC.

Bug: 263283855
Test: NFC
Change-Id: I2f298f21dade12824597e0a6920772a2bfc63afb

android/arch_list.go

@@ -26,6 +26,7 @@ var archVariants = map[ArchType][]string{
 		"armv8-a-branchprot",
 		"armv8-2a",
 		"armv8-2a-dotprod",
+		"armv9-a",
 	},
 	X86: {
 		"amberlake",
@@ -148,6 +149,9 @@ var androidArchFeatureMap = map[ArchType]map[string][]string{
 		"armv8-2a-dotprod": {
 			"dotprod",
 		},
+		"armv9-a": {
+			"dotprod",
+		},
 	},
 	X86: {
 		"amberlake": {

cc/config/arm64_device.go

@@ -41,6 +41,11 @@ var (
 		"armv8-2a-dotprod": []string{
 			"-march=armv8.2-a+dotprod",
 		},
+		"armv9-a": []string{
+			"-march=armv8.2-a+dotprod",
+			"-mbranch-protection=standard",
+			"-fno-stack-protector",
+		},
 	}
 
 	arm64Ldflags = []string{
@@ -101,6 +106,7 @@ func init() {
 	exportedVars.ExportStringListStaticVariable("Arm64Armv8ABranchProtCflags", arm64ArchVariantCflags["armv8-a-branchprot"])
 	exportedVars.ExportStringListStaticVariable("Arm64Armv82ACflags", arm64ArchVariantCflags["armv8-2a"])
 	exportedVars.ExportStringListStaticVariable("Arm64Armv82ADotprodCflags", arm64ArchVariantCflags["armv8-2a-dotprod"])
+	exportedVars.ExportStringListStaticVariable("Arm64Armv9ACflags", arm64ArchVariantCflags["armv9-a"])
 
 	exportedVars.ExportStringListStaticVariable("Arm64CortexA53Cflags", arm64CpuVariantCflags["cortex-a53"])
 	exportedVars.ExportStringListStaticVariable("Arm64CortexA55Cflags", arm64CpuVariantCflags["cortex-a55"])
@@ -117,6 +123,7 @@ var (
 		"armv8-a-branchprot": "${config.Arm64Armv8ABranchProtCflags}",
 		"armv8-2a":           "${config.Arm64Armv82ACflags}",
 		"armv8-2a-dotprod":   "${config.Arm64Armv82ADotprodCflags}",
+		"armv9-a":            "${config.Arm64Armv9ACflags}",
 	}
 
 	arm64CpuVariantCflagsVar = map[string]string{
@@ -193,6 +200,7 @@ func arm64ToolchainFactory(arch android.Arch) Toolchain {
 	case "armv8-a-branchprot":
 	case "armv8-2a":
 	case "armv8-2a-dotprod":
+	case "armv9-a":
 		// Nothing extra for armv8-a/armv8-2a
 	default:
 		panic(fmt.Sprintf("Unknown ARM architecture version: %q", arch.ArchVariant))

rust/config/arm64_device.go

@@ -30,6 +30,7 @@ var (
 		"armv8-a-branchprot": []string{},
 		"armv8-2a":           []string{},
 		"armv8-2a-dotprod":   []string{},
+		"armv9-a":            []string{},
 	}
 )