diff options
Diffstat (limited to 'user-exec.c')
| -rw-r--r-- | user-exec.c | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/user-exec.c b/user-exec.c index 82bfa66ce3..8ed6fec814 100644 --- a/user-exec.c +++ b/user-exec.c @@ -38,19 +38,22 @@ //#define DEBUG_SIGNAL -static void exception_action(CPUArchState *env1) +static void exception_action(CPUState *cpu) { #if defined(TARGET_I386) - raise_exception_err(env1, env1->exception_index, env1->error_code); + X86CPU *x86_cpu = X86_CPU(cpu); + CPUX86State *env1 = &x86_cpu->env; + + raise_exception_err(env1, cpu->exception_index, env1->error_code); #else - cpu_loop_exit(env1); + cpu_loop_exit(cpu); #endif } /* exit the current TB from a signal handler. The host registers are restored in a state compatible with the CPU emulator */ -void cpu_resume_from_signal(CPUArchState *env1, void *puc) +void cpu_resume_from_signal(CPUState *cpu, void *puc) { #ifdef __linux__ struct ucontext *uc = puc; @@ -70,8 +73,8 @@ void cpu_resume_from_signal(CPUArchState *env1, void *puc) sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL); #endif } - env1->exception_index = -1; - siglongjmp(env1->jmp_env, 1); + cpu->exception_index = -1; + siglongjmp(cpu->jmp_env, 1); } /* 'pc' is the host PC at which the exception was raised. 'address' is @@ -82,7 +85,8 @@ static inline int handle_cpu_signal(uintptr_t pc, unsigned long address, int is_write, sigset_t *old_set, void *puc) { - CPUArchState *env; + CPUState *cpu; + CPUClass *cc; int ret; #if defined(DEBUG_SIGNAL) @@ -99,9 +103,11 @@ static inline int handle_cpu_signal(uintptr_t pc, unsigned long address, are still valid segv ones */ address = h2g_nocheck(address); - env = current_cpu->env_ptr; + cpu = current_cpu; + cc = CPU_GET_CLASS(cpu); /* see if it is an MMU fault */ - ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX); + g_assert(cc->handle_mmu_fault); + ret = cc->handle_mmu_fault(cpu, address, is_write, MMU_USER_IDX); if (ret < 0) { return 0; /* not an MMU fault */ } @@ -109,12 +115,12 @@ static inline int handle_cpu_signal(uintptr_t pc, unsigned long address, return 1; /* the MMU fault was handled without causing real CPU fault */ } /* now we have a real cpu fault */ - cpu_restore_state(env, pc); + cpu_restore_state(cpu, pc); /* we restore the process signal mask as the sigreturn should do it (XXX: use sigsetjmp) */ sigprocmask(SIG_SETMASK, old_set, NULL); - exception_action(env); + exception_action(cpu); /* never comes here */ return 1; @@ -459,16 +465,29 @@ int cpu_signal_handler(int host_signum, void *pinfo, #elif defined(__aarch64__) -int cpu_signal_handler(int host_signum, void *pinfo, - void *puc) +int cpu_signal_handler(int host_signum, void *pinfo, void *puc) { siginfo_t *info = pinfo; struct ucontext *uc = puc; - uint64_t pc; - int is_write = 0; /* XXX how to determine? */ + uintptr_t pc = uc->uc_mcontext.pc; + uint32_t insn = *(uint32_t *)pc; + bool is_write; - pc = uc->uc_mcontext.pc; - return handle_cpu_signal(pc, (uint64_t)info->si_addr, + /* XXX: need kernel patch to get write flag faster. */ + is_write = ( (insn & 0xbfff0000) == 0x0c000000 /* C3.3.1 */ + || (insn & 0xbfe00000) == 0x0c800000 /* C3.3.2 */ + || (insn & 0xbfdf0000) == 0x0d000000 /* C3.3.3 */ + || (insn & 0xbfc00000) == 0x0d800000 /* C3.3.4 */ + || (insn & 0x3f400000) == 0x08000000 /* C3.3.6 */ + || (insn & 0x3bc00000) == 0x39000000 /* C3.3.13 */ + || (insn & 0x3fc00000) == 0x3d800000 /* ... 128bit */ + /* Ingore bits 10, 11 & 21, controlling indexing. */ + || (insn & 0x3bc00000) == 0x38000000 /* C3.3.8-12 */ + || (insn & 0x3fe00000) == 0x3c800000 /* ... 128bit */ + /* Ignore bits 23 & 24, controlling indexing. */ + || (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */ + + return handle_cpu_signal(pc, (uintptr_t)info->si_addr, is_write, &uc->uc_sigmask, puc); } |