Commit 1c3c8af1 authored by Pavel Dovgalyuk's avatar Pavel Dovgalyuk Committed by Richard Henderson
Browse files

cpu-exec: introduce loop exit with restore function 



This patch introduces loop exit function, which also
restores guest CPU state according to the value of host
program counter.

Reviewed-by: default avatarAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: default avatarPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150710095702.13280.97477.stgit@PASHA-ISP>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent b8611499

cpu-exec.c

+9 −0
Original line number Diff line number Diff line
@@ -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

 */

include/exec/exec-all.h

+1 −0
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, 
                              int cflags);

void cpu_exec_init(CPUState *cpu, Error **errp);

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);