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x86_64: implement @returnAddress and @frameAddress

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This commit is contained in:
Jacob Young 2023-03-18 23:10:44 -04:00 committed by Jakub Konka
parent 53ec2a955e
commit 80427796df
2 changed files with 9 additions and 3 deletions
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11
src/arch/x86_64/CodeGen.zig
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@ -4119,12 +4119,19 @@ fn airBreakpoint(self: *Self) !void {
}
fn airRetAddr(self: *Self, inst: Air.Inst.Index) !void {
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else return self.fail("TODO implement airRetAddr for x86_64", .{});
const result: MCValue = if (self.liveness.isUnused(inst))
.dead
else
.{ .stack_offset = -@as(i32, @divExact(self.target.cpu.arch.ptrBitWidth(), 8)) };
return self.finishAir(inst, result, .{ .none, .none, .none });
}
fn airFrameAddress(self: *Self, inst: Air.Inst.Index) !void {
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else return self.fail("TODO implement airFrameAddress for x86_64", .{});
const result = if (self.liveness.isUnused(inst)) .dead else result: {
const dst_mcv = try self.allocRegOrMem(inst, true);
try self.genBinOpMir(.mov, Type.usize, dst_mcv, .{ .register = .rbp });
break :result dst_mcv;
};
return self.finishAir(inst, result, .{ .none, .none, .none });
}

1
test/behavior/return_address.zig
View File

@ -7,7 +7,6 @@ fn retAddr() usize {
test "return address" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO