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implement swap and drop opcodes; stub out GNU_UnInit

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Nikita Smith
2026-02-05 17:43:20 -08:00
parent 5986e595ce
commit 4b893d50ec
1 changed files with 15 additions and 4 deletions
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src/rdi_from_dwarf/rdi_from_dwarf.c
+15 -4
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@@ -1330,12 +1330,21 @@ d2r_bytecode_from_expression(Arena *arena,
d2r_value_type_stack_push(scratch.arena, stack, d2r_value_type_stack_peek(stack)); d2r_value_type_stack_push(scratch.arena, stack, d2r_value_type_stack_peek(stack));
} break; } break;
case DW_ExprOp_Rot: { AssertAlways(!"no suitable conversion"); } break; case DW_ExprOp_Rot: { AssertAlways(!"no suitable conversion"); } break;
case DW_ExprOp_Swap: { AssertAlways(!"no suitable conversion"); } break; case DW_ExprOp_Swap: {
case DW_ExprOp_Drop: { AssertAlways(!"no suitable conversion"); } break; D2R_ValueType a = d2r_value_type_stack_pop(stack);
D2R_ValueType b = d2r_value_type_stack_pop(stack);
d2r_value_type_stack_push(scratch.arena, stack, a);
d2r_value_type_stack_push(scratch.arena, stack, b);
rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Swap, 0);
} break;
case DW_ExprOp_Drop: {
d2r_value_type_stack_pop(stack);
rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Pop, 0);
} break;
case DW_ExprOp_StackValue: { case DW_ExprOp_StackValue: {
rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Stop, 0); rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Stop, 0);
if (stack->top->type == D2R_ValueType_Address) { if (stack->top->type == D2R_ValueType_Address) {
stack->top->type = d2r_unsigned_value_type_from_bit_size(address_size * 8); stack->top->type = d2r_unsigned_value_type_from_bit_size(cu->address_size * 8);
} }
} break; } break;
case DW_ExprOp_FormTlsAddress: case DW_ExprOp_FormTlsAddress:
@@ -1349,7 +1358,9 @@ d2r_bytecode_from_expression(Arena *arena,
rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Add, d2r_value_type_to_rdi(lhs)); rdim_bytecode_push_op(arena, &bc, RDI_EvalOp_Add, d2r_value_type_to_rdi(lhs));
d2r_value_type_stack_push(scratch.arena, stack, D2R_ValueType_Address); d2r_value_type_stack_push(scratch.arena, stack, D2R_ValueType_Address);
} break; } break;
case DW_ExprOp_GNU_UnInit: {
// TODO: flag value as unitialized; this must be last opcode; possible to use with DW_ExprOp_Piece;
} break;
default: InvalidPath; break; default: InvalidPath; break;
} }
if (!is_ok) { break; } if (!is_ok) { break; }