[Qemu-devel] [PATCH v3 03/15] cpu-exec: Rename cpu_resume_from_signal() to cpu_loop_exit_noexc()

[Stefan Hajnoczi]

From: Peter Maydell <address@hidden>

The function cpu_resume_from_signal() is now always called with a
NULL puc argument, and is rather misnamed since it is never called
from a signal handler. It is essentially forcing an exit to the
top level cpu loop but without raising any exception, so rename
it to cpu_loop_exit_noexc() and drop the useless unused argument.

Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Sergey Fedorov <address@hidden>
Acked-by: Eduardo Habkost <address@hidden>
Acked-by: Riku Voipio <address@hidden>
Message-id: address@hidden
---
 cpu-exec-common.c        | 6 ++----
 exec.c                   | 2 +-
 hw/i386/kvmvapic.c       | 2 +-
 include/exec/exec-all.h  | 2 +-
 target-i386/bpt_helper.c | 2 +-
 target-lm32/helper.c     | 2 +-
 target-s390x/helper.c    | 2 +-
 target-xtensa/helper.c   | 2 +-
 translate-all.c          | 4 ++--
 user-exec.c              | 2 +-
 10 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/cpu-exec-common.c b/cpu-exec-common.c
index 0cb5b63..0cb4ae6 100644
--- a/cpu-exec-common.c
+++ b/cpu-exec-common.c
@@ -26,10 +26,8 @@
 bool exit_request;
 CPUState *tcg_current_cpu;
 
-/* exit the current TB from a signal handler. The host registers are
-   restored in a state compatible with the CPU emulator
- */
-void cpu_resume_from_signal(CPUState *cpu, void *puc)
+/* exit the current TB, but without causing any exception to be raised */
+void cpu_loop_exit_noexc(CPUState *cpu)
 {
     /* XXX: restore cpu registers saved in host registers */
 
diff --git a/exec.c b/exec.c
index f2c9e37..a9d465b 100644
--- a/exec.c
+++ b/exec.c
@@ -2091,7 +2091,7 @@ static void check_watchpoint(int offset, int len, 
MemTxAttrs attrs, int flags)
                 } else {
                     cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags);
                     tb_gen_code(cpu, pc, cs_base, cpu_flags, 1);
-                    cpu_resume_from_signal(cpu, NULL);
+                    cpu_loop_exit_noexc(cpu);
                 }
             }
         } else {
diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index 5b71b1b..3bf1ddd 100644
--- a/hw/i386/kvmvapic.c
+++ b/hw/i386/kvmvapic.c
@@ -450,7 +450,7 @@ static void patch_instruction(VAPICROMState *s, X86CPU 
*cpu, target_ulong ip)
 
     if (!kvm_enabled()) {
         tb_gen_code(cs, current_pc, current_cs_base, current_flags, 1);
-        cpu_resume_from_signal(cs, NULL);
+        cpu_loop_exit_noexc(cs);
     }
 }
 
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index b6a4a12..e076397 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -50,7 +50,7 @@ void restore_state_to_opc(CPUArchState *env, struct 
TranslationBlock *tb,
 void cpu_gen_init(void);
 bool cpu_restore_state(CPUState *cpu, uintptr_t searched_pc);
 
-void QEMU_NORETURN cpu_resume_from_signal(CPUState *cpu, void *puc);
+void QEMU_NORETURN cpu_loop_exit_noexc(CPUState *cpu);
 void QEMU_NORETURN cpu_io_recompile(CPUState *cpu, uintptr_t retaddr);
 TranslationBlock *tb_gen_code(CPUState *cpu,
                               target_ulong pc, target_ulong cs_base,
diff --git a/target-i386/bpt_helper.c b/target-i386/bpt_helper.c
index 499a277..6fd7fe0 100644
--- a/target-i386/bpt_helper.c
+++ b/target-i386/bpt_helper.c
@@ -218,7 +218,7 @@ void breakpoint_handler(CPUState *cs)
             if (check_hw_breakpoints(env, false)) {
                 raise_exception(env, EXCP01_DB);
             } else {
-                cpu_resume_from_signal(cs, NULL);
+                cpu_loop_exit_noexc(cs);
             }
         }
     } else {
diff --git a/target-lm32/helper.c b/target-lm32/helper.c
index b8f4ed9..891da18 100644
--- a/target-lm32/helper.c
+++ b/target-lm32/helper.c
@@ -141,7 +141,7 @@ void lm32_debug_excp_handler(CPUState *cs)
             if (check_watchpoints(env)) {
                 raise_exception(env, EXCP_WATCHPOINT);
             } else {
-                cpu_resume_from_signal(cs, NULL);
+                cpu_loop_exit_noexc(cs);
             }
         }
     } else {
diff --git a/target-s390x/helper.c b/target-s390x/helper.c
index ad8f797..9a744df 100644
--- a/target-s390x/helper.c
+++ b/target-s390x/helper.c
@@ -688,7 +688,7 @@ void s390x_cpu_debug_excp_handler(CPUState *cs)
            will be triggered, it will call load_psw which will recompute
            the watchpoints.  */
         cpu_watchpoint_remove_all(cs, BP_CPU);
-        cpu_resume_from_signal(cs, NULL);
+        cpu_loop_exit_noexc(cs);
     }
 }
 #endif /* CONFIG_USER_ONLY */
diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c
index 839f4a7..768b32c 100644
--- a/target-xtensa/helper.c
+++ b/target-xtensa/helper.c
@@ -108,7 +108,7 @@ void xtensa_breakpoint_handler(CPUState *cs)
             if (cause) {
                 debug_exception_env(env, cause);
             }
-            cpu_resume_from_signal(cs, NULL);
+            cpu_loop_exit_noexc(cs);
         }
     }
 }
diff --git a/translate-all.c b/translate-all.c
index ff588f3..118e7d3 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -1395,7 +1395,7 @@ void tb_invalidate_phys_page_range(tb_page_addr_t start, 
tb_page_addr_t end,
            modifying the memory. It will ensure that it cannot modify
            itself */
         tb_gen_code(cpu, current_pc, current_cs_base, current_flags, 1);
-        cpu_resume_from_signal(cpu, NULL);
+        cpu_loop_exit_noexc(cpu);
     }
 #endif
 }
@@ -1654,7 +1654,7 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
        repeating the fault, which is horribly inefficient.
        Better would be to execute just this insn uncached, or generate a
        second new TB.  */
-    cpu_resume_from_signal(cpu, NULL);
+    cpu_loop_exit_noexc(cpu);
 }
 
 void tb_flush_jmp_cache(CPUState *cpu, target_ulong addr)
diff --git a/user-exec.c b/user-exec.c
index efd34a6..c5179a4 100644
--- a/user-exec.c
+++ b/user-exec.c
@@ -74,7 +74,7 @@ static void cpu_exit_tb_from_sighandler(CPUState *cpu, void 
*puc)
     sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
 #endif
 
-    cpu_resume_from_signal(cpu, NULL);
+    cpu_loop_exit_noexc(cpu);
 }
 
 /* 'pc' is the host PC at which the exception was raised. 'address' is
-- 
2.5.5