diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h index 9d79017642..2b395d5c97 100644 --- a/bsd-user/arm/target_arch_cpu.h +++ b/bsd-user/arm/target_arch_cpu.h @@ -39,8 +39,7 @@ static inline void target_cpu_init(CPUARMState *env, static inline void target_cpu_loop(CPUARMState *env) { - int trapnr; - target_siginfo_t info; + int trapnr, si_signo, si_code; unsigned int n; CPUState *cs = env_cpu(env); @@ -150,15 +149,41 @@ static inline void target_cpu_loop(CPUARMState *env) /* just indicate that signals should be handled asap */ break; case EXCP_PREFETCH_ABORT: - /* See arm/arm/trap.c prefetch_abort_handler() */ case EXCP_DATA_ABORT: - /* See arm/arm/trap.c data_abort_handler() */ - info.si_signo = TARGET_SIGSEGV; - info.si_errno = 0; - /* XXX: check env->error_code */ - info.si_code = 0; - info.si_addr = env->exception.vaddress; - queue_signal(env, info.si_signo, &info); + /* + * See arm/arm/trap-v6.c prefetch_abort_handler() and + * data_abort_handler() + * + * However, FreeBSD maps these to a generic value and then uses that + * to maybe fault in pages in vm/vm_fault.c:vm_fault_trap(). I + * believe that the indirection maps the same as Linux, but haven't + * chased down every single possible indirection. + */ + + /* For user-only we don't set TTBCR_EAE, so look at the FSR. */ + switch (env->exception.fsr & 0x1f) { + case 0x1: /* Alignment */ + si_signo = TARGET_SIGBUS; + si_code = TARGET_BUS_ADRALN; + break; + case 0x3: /* Access flag fault, level 1 */ + case 0x6: /* Access flag fault, level 2 */ + case 0x9: /* Domain fault, level 1 */ + case 0xb: /* Domain fault, level 2 */ + case 0xd: /* Permission fault, level 1 */ + case 0xf: /* Permission fault, level 2 */ + si_signo = TARGET_SIGSEGV; + si_code = TARGET_SEGV_ACCERR; + break; + case 0x5: /* Translation fault, level 1 */ + case 0x7: /* Translation fault, level 2 */ + si_signo = TARGET_SIGSEGV; + si_code = TARGET_SEGV_MAPERR; + break; + default: + g_assert_not_reached(); + } + force_sig_fault(si_signo, si_code, env->exception.vaddress); break; case EXCP_DEBUG: case EXCP_BKPT: