From 14c8a3a157b437e54fbe097d991dca86ac828a14 Mon Sep 17 00:00:00 2001 From: Sandra Loosemore Date: Wed, 13 Feb 2019 09:50:26 -0700 Subject: [PATCH] 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 Reviewed-by: Peter Maydell Message-Id: <1550076626-7202-1-git-send-email-sandra@codesourcery.com> Signed-off-by: Laurent Vivier --- 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 b96b1aa119..5aa1eca740 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 */