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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: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150710095702.13280.97477.stgit@PASHA-ISP>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Pavel Dovgalyuk 2015-07-10 12:57:02 +03:00 committed by Richard Henderson
parent b8611499b9
commit 1c3c8af1fb
2 changed files with 10 additions and 0 deletions
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9
cpu-exec.c
View File

@ -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
*/

1
include/exec/exec-all.h
View File

@ -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);