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compiler-rt: More clear_cache implementations

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LemonBoy 2020-03-31 12:40:28 +02:00 • committed by Andrew Kelley
parent d57b5205c6
commit e9c49f423d
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2 changed files with 33 additions and 17 deletions
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2
lib/std/special/compiler_rt.zig
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@ -20,6 +20,8 @@ comptime {
.aarch64, .aarch64,
.aarch64_be, .aarch64_be,
.aarch64_32, .aarch64_32,
.riscv32,
.riscv64,
=> @export(@import("compiler_rt/clear_cache.zig").clear_cache, .{ => @export(@import("compiler_rt/clear_cache.zig").clear_cache, .{
.name = "__clear_cache", .name = "__clear_cache",
.linkage = linkage, .linkage = linkage,

48
lib/std/special/compiler_rt/clear_cache.zig
View file

@ -26,6 +26,10 @@ pub fn clear_cache(start: usize, end: usize) callconv(.C) void {
.mips, .mipsel, .mips64, .mips64el => true, .mips, .mipsel, .mips64, .mips64el => true,
else => false, else => false,
}; };
const riscv = switch (arch) {
.riscv32, .riscv64 => true,
else => false,
};
const powerpc64 = switch (arch) { const powerpc64 = switch (arch) {
.powerpc64, .powerpc64le => true, .powerpc64, .powerpc64le => true,
else => false, else => false,
@ -45,28 +49,31 @@ pub fn clear_cache(start: usize, end: usize) callconv(.C) void {
@compileError("TODO"); @compileError("TODO");
// FlushInstructionCache(GetCurrentProcess(), start, end - start); // FlushInstructionCache(GetCurrentProcess(), start, end - start);
} else if (arm32 and !apple) { } else if (arm32 and !apple) {
if (os == .freebsd or os == .netbsd) { switch (os) {
// struct arm_sync_icache_args arg; .freebsd, .netbsd => {
// var arg = arm_sync_icache_args{
// arg.addr = (uintptr_t)start; .addr = start,
// arg.len = (uintptr_t)end - (uintptr_t)start; .len = end - start,
// };
// sysarch(ARM_SYNC_ICACHE, &arg); const result = sysarch(ARM_SYNC_ICACHE, @ptrToInt(&arg));
@compileError("TODO: implement for NetBSD/FreeBSD"); std.debug.assert(result == 0);
} else if (os == .linux) { },
const result = std.os.linux.syscall3(.cacheflush, start, end, 0); .linux => {
std.debug.assert(result == 0); const result = std.os.linux.syscall3(.cacheflush, start, end, 0);
} else { std.debug.assert(result == 0);
@compileError("no __clear_cache implementation available for this target"); },
else => @compileError("TODO"),
} }
} else if (os == .linux and mips) { } else if (os == .linux and mips) {
@compileError("TODO"); const flags = 3; // ICACHE | DCACHE
//const uintptr_t start_int = (uintptr_t)start; const result = std.os.linux.syscall3(std.os.linux.SYS_cacheflush, start, end - start, flags);
//const uintptr_t end_int = (uintptr_t)end; std.debug.assert(result == 0);
//syscall(__NR_cacheflush, start, (end_int - start_int), BCACHE);
} else if (mips and os == .openbsd) { } else if (mips and os == .openbsd) {
@compileError("TODO"); @compileError("TODO");
//cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE); //cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE);
} else if (os == .linux and riscv) {
const result = std.os.linux.syscall3(std.os.linux.SYS_riscv_flush_icache, start, end - start, 0);
std.debug.assert(result == 0);
} else if (arm64 and !apple) { } else if (arm64 and !apple) {
// Get Cache Type Info. // Get Cache Type Info.
// TODO memoize this? // TODO memoize this?
@ -142,3 +149,10 @@ pub fn clear_cache(start: usize, end: usize) callconv(.C) void {
// Darwin-only // Darwin-only
extern fn sys_icache_invalidate(start: usize, len: usize) void; extern fn sys_icache_invalidate(start: usize, len: usize) void;
// BSD-only
const arm_sync_icache_args = extern struct {
addr: usize, // Virtual start address
len: usize, // Region size
};
const ARM_SYNC_ICACHE = 0;
extern "c" fn sysarch(number: i32, args: usize) i32;