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| author | Jakub Konka <kubkon@jakubkonka.com> | 2022-04-13 16:24:56 +0200 |
|---|---|---|
| committer | Jakub Konka <kubkon@jakubkonka.com> | 2022-04-13 16:24:56 +0200 |
| commit | 3f912430bdddede8c3f6a9555b76499aa2dabb7e (patch) | |
| tree | 8c405e643a8cfa44d4f0d5838a570576dd106caa /src | |
| parent | 0bf72833307bf500ebec1a08641600f12cda0434 (diff) | |
| download | zig-3f912430bdddede8c3f6a9555b76499aa2dabb7e.tar.gz zig-3f912430bdddede8c3f6a9555b76499aa2dabb7e.zip | |
stage2,x64: deref memory if referenced via GOT for local vars
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86_64/CodeGen.zig | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/arch/x86_64/CodeGen.zig b/src/arch/x86_64/CodeGen.zig index a06f7941b4..32065fa1bb 100644 --- a/src/arch/x86_64/CodeGen.zig +++ b/src/arch/x86_64/CodeGen.zig @@ -3911,8 +3911,8 @@ fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void { const tag = self.air.instructions.items(.tag)[inst]; switch (tag) { - .dbg_var_ptr => try self.genVarDbgInfo(ty.childType(), mcv, name), - .dbg_var_val => try self.genVarDbgInfo(ty, mcv, name), + .dbg_var_ptr => try self.genVarDbgInfo(tag, ty.childType(), mcv, name), + .dbg_var_val => try self.genVarDbgInfo(tag, ty, mcv, name), else => unreachable, } @@ -3921,6 +3921,7 @@ fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void { fn genVarDbgInfo( self: *Self, + tag: Air.Inst.Tag, ty: Type, mcv: MCValue, name: [:0]const u8, @@ -3952,9 +3953,14 @@ fn genVarDbgInfo( .memory => |addr| { const endian = self.target.cpu.arch.endian(); const ptr_width = @intCast(u8, @divExact(self.target.cpu.arch.ptrBitWidth(), 8)); + const is_ptr = switch (tag) { + .dbg_var_ptr => true, + .dbg_var_val => false, + else => unreachable, + }; try dbg_info.ensureUnusedCapacity(2 + ptr_width); dbg_info.appendSliceAssumeCapacity(&[2]u8{ // DW.AT.location, DW.FORM.exprloc - 1 + ptr_width, + 1 + ptr_width + @boolToInt(is_ptr), DW.OP.addr, // literal address }); switch (ptr_width) { @@ -3966,6 +3972,10 @@ fn genVarDbgInfo( }, else => unreachable, } + if (is_ptr) { + // We need deref the address as we point to the value via GOT entry. + try dbg_info.append(DW.OP.deref); + } }, else => { log.debug("TODO generate debug info for {}", .{mcv}); |