static inline int handle_cpu_signal(unsigned long pc, unsigned long address, int is_write, sigset_t *old_set) { #if defined(DEBUG_SIGNAL) printf("qemu: SIGSEGV pc=0x%08lx address=%08lx wr=%d oldset=0x%08lx\n", pc, address, is_write, *(unsigned long *)old_set); #endif /* XXX: locking issue */ if (is_write && page_unprotect(address)) { sigprocmask(SIG_SETMASK, old_set, NULL); return 1; } if (pc >= (unsigned long)code_gen_buffer && pc < (unsigned long)code_gen_buffer + CODE_GEN_BUFFER_SIZE) { /* the PC is inside the translated code. It means that we have a virtual CPU fault */ /* we restore the process signal mask as the sigreturn should do it */ sigprocmask(SIG_SETMASK, old_set, NULL); /* XXX: need to compute virtual pc position by retranslating code. The rest of the CPU state should be correct. */ env->cr2 = address; raise_exception_err(EXCP0E_PAGE, 4 | (is_write << 1)); /* never comes here */ return 1; } else { return 0; } }