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[Qemu-devel] [PATCH v5 02/11] cpu-exec: introduce loop exit with restore
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [PATCH v5 02/11] cpu-exec: introduce loop exit with restore function |
Date: |
Mon, 06 Jul 2015 11:25:49 +0300 |
User-agent: |
StGit/0.16 |
This patch introduces loop exit function, which also
restores guest CPU state according to the value of host
program counter.
Reviewed-by: Richard Henderson <address@hidden>
Reviewed-by: Aurelien Jarno <address@hidden>
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
cpu-exec.c | 9 +++++++++
include/exec/exec-all.h | 1 +
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 0734af2..0b5449e 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -134,6 +134,15 @@ void cpu_loop_exit(CPUState *cpu)
siglongjmp(cpu->jmp_env, 1);
}
+void cpu_loop_exit_restore(CPUState *cpu, uintptr_t pc)
+{
+ if (pc) {
+ cpu_restore_state(cpu, pc);
+ }
+ cpu->current_tb = NULL;
+ siglongjmp(cpu->jmp_env, 1);
+}
+
/* exit the current TB from a signal handler. The host registers are
restored in a state compatible with the CPU emulator
*/
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 682cb07..6a0ccb6 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -90,6 +90,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
int cflags);
void cpu_exec_init(CPUArchState *env);
void QEMU_NORETURN cpu_loop_exit(CPUState *cpu);
+void QEMU_NORETURN cpu_loop_exit_restore(CPUState *cpu, uintptr_t pc);
#if !defined(CONFIG_USER_ONLY)
//bool qemu_in_vcpu_thread(void);