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compiler-rt: don't export __clear_cache when no impl available

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Andrew Kelley committed 2020-03-30 23:15:07 -04:00
1 parent f6f03cd90f
commit 83ff94b1cc
2 files changed
+24 -10
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lib/std/special/compiler_rt.zig
+22 -3
View File
@@ -10,10 +10,29 @@ comptime {
const strong_linkage = if (is_test) builtin.GlobalLinkage.Internal else builtin.GlobalLinkage.Strong;
switch (builtin.arch) {
.i386, .x86_64 => @export(@import("compiler_rt/stack_probe.zig").zig_probe_stack, .{ .name = "__zig_probe_stack", .linkage = linkage }),
.aarch64, .aarch64_be, .aarch64_32, .arm, .armeb, .thumb, .thumbeb => {
@export(@import("compiler_rt/clear_cache.zig").clear_cache, .{ .name = "__clear_cache", .linkage = linkage });
.i386,
.x86_64,
=> @export(@import("compiler_rt/stack_probe.zig").zig_probe_stack, .{
.name = "__zig_probe_stack",
.linkage = linkage,
}),
.aarch64,
.aarch64_be,
.aarch64_32,
=> @export(@import("compiler_rt/clear_cache.zig").clear_cache, .{
.name = "__clear_cache",
.linkage = linkage,
}),
.arm, .armeb, .thumb, .thumbeb => switch (builtin.os.tag) {
.linux => @export(@import("compiler_rt/clear_cache.zig").clear_cache, .{
.name = "__clear_cache",
.linkage = linkage,
}),
else => {},
},
else => {},
}
lib/std/special/compiler_rt/clear_cache.zig
+2 -7
View File
@@ -54,15 +54,10 @@ pub fn clear_cache(start: usize, end: usize) callconv(.C) void {
// sysarch(ARM_SYNC_ICACHE, &arg);
@compileError("TODO: implement for NetBSD/FreeBSD");
} else if (os == .linux) {
const result = std.os.linux.syscall3(
std.os.linux.SYS_cacheflush,
start,
end,
0,
);
const result = std.os.linux.syscall3(std.os.linux.SYS_cacheflush, start, end, 0);
std.debug.assert(result == 0);
} else {
@compileError("compilerrt_abort");
@compileError("no __clear_cache implementation available for this target");
}
} else if (os == .linux and mips) {
@compileError("TODO");