[Qemu-devel] [PATCH 1/5] target-i386: drop usage of prev_debug_excp_handler

[Igor Mammedov <imammedo@redhat.com>]

Chain of exception handlers are currently unused feature, drop it
for now to avoid moving prev_debug_excp_handler variable at global
scope when moving tcg initialization into target-i386/cpu.c

Later we probably could re-invent better interface for this.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 target-i386/helper.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/target-i386/helper.c b/target-i386/helper.c
index 2cc8097..b9384f6 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -941,8 +941,6 @@ int check_hw_breakpoints(CPUX86State *env, int force_dr6_update)
     return hit_enabled;
 }
 
-static CPUDebugExcpHandler *prev_debug_excp_handler;
-
 static void breakpoint_handler(CPUX86State *env)
 {
     CPUBreakpoint *bp;
@@ -965,8 +963,6 @@ static void breakpoint_handler(CPUX86State *env)
                 break;
             }
     }
-    if (prev_debug_excp_handler)
-        prev_debug_excp_handler(env);
 }
 
 typedef struct MCEInjectionParams {
@@ -1166,8 +1162,7 @@ X86CPU *cpu_x86_init(const char *cpu_model)
         inited = 1;
         optimize_flags_init();
 #ifndef CONFIG_USER_ONLY
-        prev_debug_excp_handler =
-            cpu_set_debug_excp_handler(breakpoint_handler);
+        cpu_set_debug_excp_handler(breakpoint_handler);
 #endif
     }
     if (cpu_x86_register(cpu, cpu_model) < 0) {
-- 
1.7.10.2