fix(debug): hardware watchpoints, signal stops and breakpoint restore

Assisted-by: GLM 5.3
2026-09-19 23:49:19 +02:00
parent 375182ef1f
commit a8bfd54ed2
26 changed files with 1408 additions and 535 deletions
@@ -126,5 +126,9 @@ func (r *Regs) RegValue(name string) (uint64, bool) {
 // breakpointInsn is the software breakpoint instruction (EBREAK).
 var breakpointInsn = []byte{0x73, 0x00, 0x10, 0x00} // ebreak

-// breakpointPCAdjust is how far PC is past the breakpoint instruction after a trap.
-const breakpointPCAdjust = 4
+// breakpointPCAdjust is how far PC is past the breakpoint instruction after
+// a trap: 0, because the kernel delivers the EBREAK SIGTRAP with sepc still
+// on the ebreak.  handle_break passes regs->epc straight to
+// force_sig_fault(SIGTRAP, TRAP_BRKPT, ...) and only the kernel-internal
+// WARN/CFI paths advance epc (arch/riscv/kernel/traps.c).
+const breakpointPCAdjust = 0