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Diffstat (limited to 'llvm_mode/README.lto.md')
| -rw-r--r-- | llvm_mode/README.lto.md | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm_mode/README.lto.md b/llvm_mode/README.lto.md index 9af9ffff..49407727 100644 --- a/llvm_mode/README.lto.md +++ b/llvm_mode/README.lto.md @@ -95,6 +95,18 @@ target binary based on string compare and memory compare functions. afl-fuzz will automatically get these transmitted when starting to fuzz. This improves coverage on a lot of targets. +## Fixed memory map + +To sped up fuzzing, the shared memory map is hard set to a specific address, +by default 0x10000. +In most cases this will work without any problems. +On unusual operating systems/processors/kernels or weird libraries this might +fail so to change the fixed address at compile time set +AFL_LLVM_MAP_ADDR (a value of 0 or empty sets the map address to be +dynamic - the original afl way, which is slower). +AFL_LLVM_MAP_DYNAMIC can be set so the shared memory address is dynamic (which +is safer but also slower). + ## Potential issues ### compiling libraries fails |