http://bugs.llvm.org/show_bug.cgi?id=32227
Bug ID: 32227
Summary: Fill between executable sections with trap
instructions
Product: lld
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: ELF
Assignee: unassignedb...@nondot.org
Reporter: r...@google.com
CC: llvm-bugs@lists.llvm.org
Currently, LLD leaves padding between executable sections as-is, so they are 0.
That is not desirable for a few reasons.
1. Disassemblers would interpret the sequences of 0 bytes at end of each
function as machine instructions and print out bogus disassembly.
2. Leaving executable 0 bytes could potentially make some attack easier.
We want to fill gaps with trap instructions. On x86 and x86-64, that is 0xcc,
for example.
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