diff options
Diffstat (limited to 'subx/035labels.cc')
| -rw-r--r-- | subx/035labels.cc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/subx/035labels.cc b/subx/035labels.cc index acbb2206..5531910a 100644 --- a/subx/035labels.cc +++ b/subx/035labels.cc @@ -125,6 +125,10 @@ void compute_byte_indices_for_labels(const segment& code, map<string, int32_t>& raise << "'" << to_string(inst) << "': labels can only be the first word in a line.\n" << end(); if (Map_file.is_open()) Map_file << "0x" << HEXWORD << (code.start + current_byte) << ' ' << label << '\n'; + if (contains_key(byte_index, label)) { + raise << "duplicate label '" << label << "'\n" << end(); + return; + } put(byte_index, label, current_byte); trace(99, "transform") << "label '" << label << "' is at address " << (current_byte+code.start) << end(); // no modifying current_byte; label definitions won't be in the final binary @@ -237,6 +241,14 @@ loop: # second jump is to 0 (fall through) +transform: instruction after transform: 'eb 00' +:(scenario duplicate_label) +% Hide_errors = true; +== 0x1 +loop: +loop: + 05 0x0d0c0b0a/imm32 ++error: duplicate label 'loop' + :(scenario label_too_short) % Hide_errors = true; == 0x1 |