int cpu_signal_handler(int host_signum, void *pinfo, void *puc) { siginfo_t *info = pinfo; ucontext_t *uc = puc; uint32_t *pc = uc->uc_mcontext.sc_pc; uint32_t insn = *pc; int is_write = 0; /* XXX: need kernel patch to get write flag faster */ switch (insn >> 26) { case 0x0d: /* stw */ case 0x0e: /* stb */ case 0x0f: /* stq_u */ case 0x24: /* stf */ case 0x25: /* stg */ case 0x26: /* sts */ case 0x27: /* stt */ case 0x2c: /* stl */ case 0x2d: /* stq */ case 0x2e: /* stl_c */ case 0x2f: /* stq_c */ is_write = 1; } return handle_cpu_signal(pc, (unsigned long)info->si_addr, is_write, &uc->uc_sigmask); }