diff options
Diffstat (limited to 'bsd-user/arm/target_arch_cpu.h')
| -rw-r--r-- | bsd-user/arm/target_arch_cpu.h | 101 |
1 files changed, 55 insertions, 46 deletions
diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h index c675419c30..b087db48fa 100644 --- a/bsd-user/arm/target_arch_cpu.h +++ b/bsd-user/arm/target_arch_cpu.h @@ -21,6 +21,7 @@ #define _TARGET_ARCH_CPU_H_ #include "target_arch.h" +#include "signal-common.h" #define TARGET_DEFAULT_CPU_MODEL "any" @@ -38,8 +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); @@ -50,33 +50,22 @@ static inline void target_cpu_loop(CPUARMState *env) process_queued_cpu_work(cs); switch (trapnr) { case EXCP_UDEF: - { - /* See arm/arm/undefined.c undefinedinstruction(); */ - info.si_addr = env->regs[15]; - - /* illegal instruction */ - info.si_signo = TARGET_SIGILL; - info.si_errno = 0; - info.si_code = TARGET_ILL_ILLOPC; - queue_signal(env, info.si_signo, &info); - - /* TODO: What about instruction emulation? */ - } + case EXCP_NOCP: + case EXCP_INVSTATE: + /* + * See arm/arm/undefined.c undefinedinstruction(); + * + * A number of details aren't emulated (they likely don't matter): + * o Misaligned PC generates ILL_ILLADR (these can't come from qemu) + * o Thumb-2 instructions generate ILLADR + * o Both modes implement coprocessor instructions, which we don't + * do here. FreeBSD just implements them for the VFP coprocessor + * and special kernel breakpoints, trace points, dtrace, etc. + */ + force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->regs[15]); break; case EXCP_SWI: - case EXCP_BKPT: { - /* - * system call - * See arm/arm/trap.c cpu_fetch_syscall_args() - */ - if (trapnr == EXCP_BKPT) { - if (env->thumb) { - env->regs[15] += 2; - } else { - env->regs[15] += 4; - } - } n = env->regs[7]; if (bsd_type == target_freebsd) { int ret; @@ -84,7 +73,7 @@ static inline void target_cpu_loop(CPUARMState *env) int32_t syscall_nr = n; int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; - /* See arm/arm/trap.c cpu_fetch_syscall_args() */ + /* See arm/arm/syscall.c cpu_fetch_syscall_args() */ if (syscall_nr == TARGET_FREEBSD_NR_syscall) { syscall_nr = env->regs[0]; arg1 = env->regs[1]; @@ -160,32 +149,52 @@ 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); - break; - case EXCP_DEBUG: - { + /* + * 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. + */ - info.si_signo = TARGET_SIGTRAP; - info.si_errno = 0; - info.si_code = TARGET_TRAP_BRKPT; - info.si_addr = env->exception.vaddress; - queue_signal(env, info.si_signo, &info); + /* 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_ATOMIC: - cpu_exec_step_atomic(cs); + case EXCP_DEBUG: + case EXCP_BKPT: + force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->regs[15]); break; case EXCP_YIELD: /* nothing to do here for user-mode, just resume guest code */ break; + case EXCP_ATOMIC: + cpu_exec_step_atomic(cs); + break; default: fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); @@ -204,7 +213,7 @@ static inline void target_cpu_clone_regs(CPUARMState *env, target_ulong newsp) env->regs[0] = 0; } -static inline void target_cpu_reset(CPUArchState *cpu) +static inline void target_cpu_reset(CPUArchState *env) { } |