The handler for the debug exception will call is_valid_bugaddr(bugaddr) to check if the instruction in bugaddr is a real debug instruction. However, the expected instruction, ebreak, is possibly translated to c.ebreak by assmebler when C extension is supported. This patchset will add c.ebreak into the check mechanism. In addition, BUG() is currently unable to work in the kernel module due to an inappropriated condition in is_valid_bugaddr(). This issue will be fixed in this patchset. Finally, this patchset enables WARN() related functions to trap the code to help developers debug it.
Vincent Chen (3): riscv: Add the support for c.ebreak check in is_valid_bugaddr() riscv: Support BUG() in kernel module riscv: Make WARN() related functions able to trigger a trap exception
