https://sourceware.org/bugzilla/show_bug.cgi?id=30848
Bug ID: 30848 Summary: gas x86-64: Internal error occurs while handling `bnd` Product: binutils Version: 2.41 Status: UNCONFIRMED Severity: normal Priority: P2 Component: gas Assignee: unassigned at sourceware dot org Reporter: jwlee2217 at softsec dot kaist.ac.kr Target Milestone: --- ``` $ cat examples/bug1_1.s .intel_syntax noprefix bnd andn R11, R12, R13 $ ./as examples/bug1_1.s examples/bug1_1.s: Assembler messages: examples/bug1_1.s:2: Error: expecting valid branch instruction after `bnd' examples/bug1_1.s:2: Internal error in output_insn at config/tc-i386.c:9795. Please report this bug. ``` When the bnd prefix is used with non-control-flow instructions, the internal error shown in the example occurs. We can also observe this exception with other instructions, for example, `bnd vxorps xmm0, xmm0, [r13]`. However, not all instructions cause the error. For example, GAS rejects `bnd xor rax, rbx`, without any internal errors. Note that this issue is not intel syntax-specific. This bug can be reproduced using the binutils version 2.41. -- You are receiving this mail because: You are on the CC list for the bug.