[Qemu-devel] [PATCH] Fix breakpoint support in Nios II user-mode emulation.

[Sandra Loosemore <sandra@codesourcery.com>]

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 <sandra@codesourcery.com>
---
 linux-user/nios2/cpu_loop.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/linux-user/nios2/cpu_loop.c b/linux-user/nios2/cpu_loop.c
index b96b1aa..5aa1eca 100644
--- 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 */
-- 
2.8.1