Fix breakpoint support in Nios II user-mode emulation.

Nios II user-mode emulation was missing handling for EXCP_DEBUG, making the gdb stub essentially useless. This patch adds the missing piece. The new code was copied from the existing EXCP_TRAP handling and is also similar to what other targets (e.g., arm) do with EXCP_DEBUG. Signed-off-by: Sandra Loosemore <[email protected]> Reviewed-by: Peter Maydell <[email protected]> Message-Id: <[email protected]> Signed-off-by: Laurent Vivier <[email protected]>
stefanha · Mar 7, 2019 · 14c8a3a · 14c8a3a
1 parent cd81336
commit 14c8a3a
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/linux-user/nios2/cpu_loop.c b/linux-user/nios2/cpu_loop.c
@@ -73,6 +73,12 @@ void cpu_loop(CPUNios2State *env)
                 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
                 break;
             }
+        case EXCP_DEBUG:
+            info.si_signo = TARGET_SIGTRAP;
+            info.si_errno = 0;
+            info.si_code = TARGET_TRAP_BRKPT;
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
         case 0xaa:
             switch (env->regs[R_PC]) {
             /*case 0x1000:*/  /* TODO:__kuser_helper_version */