https://sourceware.org/bugzilla/show_bug.cgi?id=32534
Bug ID: 32534
Summary: [GAS] Intel Assembly Bugs (Mishandle Labels)
Product: binutils
Version: 2.38
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: witbring at gmail dot com
Target Milestone: ---
I am reporting GNU AS bug found during research.
The tests were conducted using the latest version (binutils 2.38).
The issue occurs in the same way with previous versions as well.
When some register names are used in operands, GAS interprets them as
actual registers. Notably, GAS allows the creation of these labels,
which could potentially lead to problems.
1. Example Code
```
.intel_syntax noprefix
.data
RAX:
RbX:
Rcx:
.long 0
.text
test:
mov edx, DWORD PTR [RAX]
mov edx, DWORD PTR [RbX]
mov edx, DWORD PTR [Rcx]
call rsP
rsP:
ret
```
2. Compilation Command
```
gcc -c test.c
```
3. Compiled Binary Output
```
0000000000000000 <test>:
0: 8b 10 mov edx,DWORD PTR [rax]
2: 8b 13 mov edx,DWORD PTR [rbx]
4: 8b 11 mov edx,DWORD PTR [rcx]
6: ff d4 call rsp
0000000000000008 <rsP>:
8: c3 ret
```
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