motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-01 06:43:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

accel/tcg/translate-all: expand cpu_restore_state addr check

Browse source 
We are still seeing signals during translation time when we walk over
a page protection boundary. This expands the check to ensure the host
PC is inside the code generation buffer. The original suggestion was
to check versus tcg_ctx.code_gen_ptr but as we now segment the
translation buffer we have to settle for just a general check for
being inside.

I've also fixed up the declaration to make it clear it can deal with
invalid addresses. A later patch will fix up the call sites.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20171108153245.20740-2-alex.bennee@linaro.org
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2017-11-13 13:55:27 +00:00 • committed by Peter Maydell
parent 7264961934
commit d25f2a7227
2 changed files with 39 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/exec/exec-all.h
View file

@ -45,6 +45,17 @@ void restore_state_to_opc(CPUArchState *env, struct TranslationBlock *tb,
target_ulong *data);
void cpu_gen_init(void);
/**
* cpu_restore_state:
* @cpu: the vCPU state is to be restore to
* @searched_pc: the host PC the fault occurred at
* @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
* restored and the function returns false.
*/
bool cpu_restore_state(CPUState *cpu, uintptr_t searched_pc);
void QEMU_NORETURN cpu_loop_exit_noexc(CPUState *cpu);