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accel/tcg: Introduce cpu_unwind_state_data

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Add a way to examine the unwind data without actually
restoring the data back into env.

Reviewed-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-10-24 22:15:04 +10:00
parent 9dd1d56e57
commit 6392bd6b90
3 changed files with 68 additions and 31 deletions
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21
include/exec/exec-all.h
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@ -39,20 +39,33 @@ typedef ram_addr_t tb_page_addr_t;
#define TB_PAGE_ADDR_FMT RAM_ADDR_FMT
#endif
/**
* cpu_unwind_state_data:
* @cpu: the cpu context
* @host_pc: the host pc within the translation
* @data: output data
*
* Attempt to load the the unwind state for a host pc occurring in
* translated code. If @host_pc is not in translated code, the
* function returns false; otherwise @data is loaded.
* This is the same unwind info as given to restore_state_to_opc.
*/
bool cpu_unwind_state_data(CPUState *cpu, uintptr_t host_pc, uint64_t *data);
/**
* cpu_restore_state:
* @cpu: the vCPU state is to be restore to
* @searched_pc: the host PC the fault occurred at
* @cpu: the cpu context
* @host_pc: the host pc within the translation
* @will_exit: true if the TB executed will be interrupted after some
cpu adjustments. Required for maintaining the correct
icount valus
* @return: true if state was restored, false otherwise
*
* Attempt to restore the state for a fault occurring in translated
* code. If the searched_pc is not in translated code no state is
* code. If @host_pc is not in translated code no state is
* restored and the function returns false.
*/
bool cpu_restore_state(CPUState *cpu, uintptr_t searched_pc, bool will_exit);
bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc, bool will_exit);
G_NORETURN void cpu_loop_exit_noexc(CPUState *cpu);
G_NORETURN void cpu_loop_exit(CPUState *cpu);