X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..5ba3f43ea354af8ad55bea84372a2bc834d8757c:/bsd/dev/i386/unix_signal.c diff --git a/bsd/dev/i386/unix_signal.c b/bsd/dev/i386/unix_signal.c index eb96e879e..1c271607f 100644 --- a/bsd/dev/i386/unix_signal.c +++ b/bsd/dev/i386/unix_signal.c @@ -53,17 +53,18 @@ #include #include #include +#include -#include +#include +#include #include - /* Forward: */ extern boolean_t machine_exception(int, mach_exception_code_t, mach_exception_subcode_t, int *, mach_exception_subcode_t *); -extern kern_return_t thread_getstatus(register thread_t act, int flavor, +extern kern_return_t thread_getstatus(thread_t act, int flavor, thread_state_t tstate, mach_msg_type_number_t *count); extern kern_return_t thread_setstatus(thread_t thread, int flavor, thread_state_t tstate, mach_msg_type_number_t count); @@ -100,11 +101,34 @@ struct sigframe32 { user32_addr_t uctx; /* struct ucontext32 */ }; +/* + * Declare table of structure flavors and sizes for 64-bit and 32-bit processes + * for the cases of extended states (plain FP, or AVX): + */ +typedef struct { + int flavor; natural_t state_count; size_t mcontext_size; +} xstate_info_t; +static const xstate_info_t thread_state64[] = { + [FP] = { x86_FLOAT_STATE64, x86_FLOAT_STATE64_COUNT, sizeof(struct mcontext64) }, + [AVX] = { x86_AVX_STATE64, x86_AVX_STATE64_COUNT, sizeof(struct mcontext_avx64) }, +#if !defined(RC_HIDE_XNU_J137) + [AVX512] = { x86_AVX512_STATE64, x86_AVX512_STATE64_COUNT, sizeof(struct mcontext_avx512_64) } +#endif +}; +static const xstate_info_t thread_state32[] = { + [FP] = { x86_FLOAT_STATE32, x86_FLOAT_STATE32_COUNT, sizeof(struct mcontext32) }, + [AVX] = { x86_AVX_STATE32, x86_AVX_STATE32_COUNT, sizeof(struct mcontext_avx32) }, +#if !defined(RC_HIDE_XNU_J137) + [AVX512] = { x86_AVX512_STATE32, x86_AVX512_STATE32_COUNT, sizeof(struct mcontext_avx512_32) } +#endif +}; + /* * NOTE: Source and target may *NOT* overlap! + * XXX: Unify with bsd/kern/kern_exit.c */ static void -siginfo_user_to_user32(user_siginfo_t *in, user32_siginfo_t *out) +siginfo_user_to_user32_x86(user_siginfo_t *in, user32_siginfo_t *out) { out->si_signo = in->si_signo; out->si_errno = in->si_errno; @@ -120,7 +144,7 @@ siginfo_user_to_user32(user_siginfo_t *in, user32_siginfo_t *out) } static void -siginfo_user_to_user64(user_siginfo_t *in, user64_siginfo_t *out) +siginfo_user_to_user64_x86(user_siginfo_t *in, user64_siginfo_t *out) { out->si_signo = in->si_signo; out->si_errno = in->si_errno; @@ -137,10 +161,15 @@ siginfo_user_to_user64(user_siginfo_t *in, user64_siginfo_t *out) void sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint32_t code) { - union { - struct mcontext32 mctx32; - struct mcontext64 mctx64; - } mctx; + union { + struct mcontext_avx32 mctx_avx32; + struct mcontext_avx64 mctx_avx64; +#if !defined(RC_HIDE_XNU_J137) + struct mcontext_avx512_32 mctx_avx512_32; + struct mcontext_avx512_64 mctx_avx512_64; +#endif + } mctx_store, *mctxp = &mctx_store; + user_addr_t ua_sp; user_addr_t ua_fp; user_addr_t ua_cr2; @@ -160,7 +189,8 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint struct uthread * ut; int stack_size = 0; int infostyle = UC_TRAD; - + xstate_t sig_xstate; + thread = current_thread(); ut = get_bsdthread_info(thread); @@ -178,7 +208,10 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint bzero((caddr_t)&sinfo64, sizeof(sinfo64)); sinfo64.si_signo = sig; - + + bzero(mctxp, sizeof(*mctxp)); + + sig_xstate = current_xstate(); if (proc_is64bit(p)) { x86_thread_state64_t *tstate64; @@ -186,23 +219,23 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint flavor = x86_THREAD_STATE64; state_count = x86_THREAD_STATE64_COUNT; - state = (void *)&mctx.mctx64.ss; + state = (void *)&mctxp->mctx_avx64.ss; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; - flavor = x86_FLOAT_STATE64; - state_count = x86_FLOAT_STATE64_COUNT; - state = (void *)&mctx.mctx64.fs; + flavor = thread_state64[sig_xstate].flavor; + state_count = thread_state64[sig_xstate].state_count; + state = (void *)&mctxp->mctx_avx64.fs; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; flavor = x86_EXCEPTION_STATE64; state_count = x86_EXCEPTION_STATE64_COUNT; - state = (void *)&mctx.mctx64.es; + state = (void *)&mctxp->mctx_avx64.es; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; - tstate64 = &mctx.mctx64.ss; + tstate64 = &mctxp->mctx_avx64.ss; /* figure out where our new stack lives */ if ((ut->uu_flag & UT_ALTSTACK) && !oonstack && @@ -214,7 +247,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint } else { ua_sp = tstate64->rsp; } - ua_cr2 = mctx.mctx64.es.faultvaddr; + ua_cr2 = mctxp->mctx_avx64.es.faultvaddr; /* The x86_64 ABI defines a 128-byte red zone. */ ua_sp -= C_64_REDZONE_LEN; @@ -225,7 +258,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint ua_sp -= sizeof (user64_siginfo_t); ua_sip = ua_sp; - ua_sp -= sizeof (struct mcontext64); + ua_sp -= thread_state64[sig_xstate].mcontext_size; ua_mctxp = ua_sp; /* @@ -254,13 +287,13 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint uctx64.uc_stack.ss_flags |= SS_ONSTACK; uctx64.uc_link = 0; - uctx64.uc_mcsize = sizeof(struct mcontext64); + uctx64.uc_mcsize = thread_state64[sig_xstate].mcontext_size; uctx64.uc_mcontext64 = ua_mctxp; if (copyout((caddr_t)&uctx64, ua_uctxp, sizeof (uctx64))) goto bad; - if (copyout((caddr_t)&mctx.mctx64, ua_mctxp, sizeof (struct mcontext64))) + if (copyout((caddr_t)&mctx_store, ua_mctxp, thread_state64[sig_xstate].mcontext_size)) goto bad; sinfo64.pad[0] = tstate64->rsp; @@ -293,23 +326,23 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint flavor = x86_THREAD_STATE32; state_count = x86_THREAD_STATE32_COUNT; - state = (void *)&mctx.mctx32.ss; + state = (void *)&mctxp->mctx_avx32.ss; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; - flavor = x86_FLOAT_STATE32; - state_count = x86_FLOAT_STATE32_COUNT; - state = (void *)&mctx.mctx32.fs; + flavor = thread_state32[sig_xstate].flavor; + state_count = thread_state32[sig_xstate].state_count; + state = (void *)&mctxp->mctx_avx32.fs; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; flavor = x86_EXCEPTION_STATE32; state_count = x86_EXCEPTION_STATE32_COUNT; - state = (void *)&mctx.mctx32.es; + state = (void *)&mctxp->mctx_avx32.es; if (thread_getstatus(thread, flavor, (thread_state_t)state, &state_count) != KERN_SUCCESS) goto bad; - tstate32 = &mctx.mctx32.ss; + tstate32 = &mctxp->mctx_avx32.ss; /* figure out where our new stack lives */ if ((ut->uu_flag & UT_ALTSTACK) && !oonstack && @@ -321,7 +354,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint } else { ua_sp = tstate32->esp; } - ua_cr2 = mctx.mctx32.es.faultvaddr; + ua_cr2 = mctxp->mctx_avx32.es.faultvaddr; ua_sp -= sizeof (struct user_ucontext32); ua_uctxp = ua_sp; // someone tramples the first word! @@ -329,7 +362,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint ua_sp -= sizeof (user32_siginfo_t); ua_sip = ua_sp; - ua_sp -= sizeof (struct mcontext32); + ua_sp -= thread_state32[sig_xstate].mcontext_size; ua_mctxp = ua_sp; ua_sp -= sizeof (struct sigframe32); @@ -375,14 +408,14 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint uctx32.uc_stack.ss_flags |= SS_ONSTACK; uctx32.uc_link = 0; - uctx32.uc_mcsize = sizeof(struct mcontext32); + uctx32.uc_mcsize = thread_state64[sig_xstate].mcontext_size; uctx32.uc_mcontext = CAST_DOWN_EXPLICIT(user32_addr_t, ua_mctxp); if (copyout((caddr_t)&uctx32, ua_uctxp, sizeof (uctx32))) goto bad; - if (copyout((caddr_t)&mctx.mctx32, ua_mctxp, sizeof (struct mcontext32))) + if (copyout((caddr_t)&mctx_store, ua_mctxp, thread_state32[sig_xstate].mcontext_size)) goto bad; sinfo64.pad[0] = tstate32->esp; @@ -495,7 +528,8 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint * in the siginfo to the handler is supposed to only * contain the status, so we have to shift it out. */ - sinfo64.si_status = WEXITSTATUS(status_and_exitcode); + sinfo64.si_status = (WEXITSTATUS(status_and_exitcode) & 0x00FFFFFF) | (((uint32_t)(p->p_xhighbits) << 24) & 0xFF000000); + p->p_xhighbits = 0; break; } } @@ -504,7 +538,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint bzero((caddr_t)&sinfo64_user64, sizeof(sinfo64_user64)); - siginfo_user_to_user64(&sinfo64,&sinfo64_user64); + siginfo_user_to_user64_x86(&sinfo64,&sinfo64_user64); #if CONFIG_DTRACE bzero((caddr_t)&(ut->t_dtrace_siginfo), sizeof(ut->t_dtrace_siginfo)); @@ -536,14 +570,14 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint flavor = x86_THREAD_STATE64; state_count = x86_THREAD_STATE64_COUNT; - state = (void *)&mctx.mctx64.ss; + state = (void *)&mctxp->mctx_avx64.ss; } else { x86_thread_state32_t *tstate32; user32_siginfo_t sinfo32; bzero((caddr_t)&sinfo32, sizeof(sinfo32)); - siginfo_user_to_user32(&sinfo64,&sinfo32); + siginfo_user_to_user32_x86(&sinfo64,&sinfo32); #if CONFIG_DTRACE bzero((caddr_t)&(ut->t_dtrace_siginfo), sizeof(ut->t_dtrace_siginfo)); @@ -571,7 +605,7 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint if (copyout((caddr_t)&sinfo32, ua_sip, sizeof (sinfo32))) goto bad; - tstate32 = &mctx.mctx32.ss; + tstate32 = &mctxp->mctx_avx32.ss; tstate32->eip = CAST_DOWN_EXPLICIT(user32_addr_t, trampact); tstate32->esp = CAST_DOWN_EXPLICIT(user32_addr_t, ua_fp); @@ -593,12 +627,15 @@ sendsig(struct proc *p, user_addr_t ua_catcher, int sig, int mask, __unused uint goto bad; ml_fp_setvalid(FALSE); + /* Tell the PAL layer about the signal */ + pal_set_signal_delivery( thread ); proc_lock(p); return; bad: + proc_lock(p); SIGACTION(p, SIGILL) = SIG_DFL; sig = sigmask(SIGILL); @@ -626,10 +663,15 @@ bad: int sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) { - union { - struct mcontext32 mctx32; - struct mcontext64 mctx64; - } mctx; + union { + struct mcontext_avx32 mctx_avx32; + struct mcontext_avx64 mctx_avx64; +#if !defined(RC_HIDE_XNU_J137) + struct mcontext_avx512_32 mctx_avx512_32; + struct mcontext_avx512_64 mctx_avx512_64; +#endif + } mctx_store, *mctxp = &mctx_store; + thread_t thread = current_thread(); struct uthread * ut; int error; @@ -641,6 +683,8 @@ sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) mach_msg_type_number_t fs_count; unsigned int fs_flavor; void * fs; + int rval = EJUSTRETURN; + xstate_t sig_xstate; ut = (struct uthread *)get_bsdthread_info(thread); @@ -656,25 +700,29 @@ sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) return (0); } + bzero(mctxp, sizeof(*mctxp)); + + sig_xstate = current_xstate(); + if (proc_is64bit(p)) { struct user_ucontext64 uctx64; if ((error = copyin(uap->uctx, (void *)&uctx64, sizeof (uctx64)))) return(error); - if ((error = copyin(uctx64.uc_mcontext64, (void *)&mctx.mctx64, sizeof (struct mcontext64)))) + if ((error = copyin(uctx64.uc_mcontext64, (void *)mctxp, thread_state64[sig_xstate].mcontext_size))) return(error); onstack = uctx64.uc_onstack & 01; ut->uu_sigmask = uctx64.uc_sigmask & ~sigcantmask; - ts_flavor = x86_THREAD_STATE64; + ts_flavor = x86_THREAD_STATE64; ts_count = x86_THREAD_STATE64_COUNT; - ts = (void *)&mctx.mctx64.ss; + ts = (void *)&mctxp->mctx_avx64.ss; - fs_flavor = x86_FLOAT_STATE64; - fs_count = x86_FLOAT_STATE64_COUNT; - fs = (void *)&mctx.mctx64.fs; + fs_flavor = thread_state64[sig_xstate].flavor; + fs_count = thread_state64[sig_xstate].state_count; + fs = (void *)&mctxp->mctx_avx64.fs; } else { struct user_ucontext32 uctx32; @@ -682,7 +730,7 @@ sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) if ((error = copyin(uap->uctx, (void *)&uctx32, sizeof (uctx32)))) return(error); - if ((error = copyin(CAST_USER_ADDR_T(uctx32.uc_mcontext), (void *)&mctx.mctx32, sizeof (struct mcontext32)))) + if ((error = copyin(CAST_USER_ADDR_T(uctx32.uc_mcontext), (void *)mctxp, thread_state32[sig_xstate].mcontext_size))) return(error); onstack = uctx32.uc_onstack & 01; @@ -690,11 +738,11 @@ sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) ts_flavor = x86_THREAD_STATE32; ts_count = x86_THREAD_STATE32_COUNT; - ts = (void *)&mctx.mctx32.ss; + ts = (void *)&mctxp->mctx_avx32.ss; - fs_flavor = x86_FLOAT_STATE32; - fs_count = x86_FLOAT_STATE32_COUNT; - fs = (void *)&mctx.mctx32.fs; + fs_flavor = thread_state32[sig_xstate].flavor; + fs_count = thread_state32[sig_xstate].state_count; + fs = (void *)&mctxp->mctx_avx32.fs; } if (onstack) @@ -704,20 +752,24 @@ sigreturn(struct proc *p, struct sigreturn_args *uap, __unused int *retval) if (ut->uu_siglist & ~ut->uu_sigmask) signal_setast(thread); - /* * thread_set_state() does all the needed checks for the passed in * content */ - if (thread_setstatus(thread, ts_flavor, ts, ts_count) != KERN_SUCCESS) - return(EINVAL); - + if (thread_setstatus(thread, ts_flavor, ts, ts_count) != KERN_SUCCESS) { + rval = EINVAL; + goto error_ret; + } + ml_fp_setvalid(TRUE); - if (thread_setstatus(thread, fs_flavor, fs, fs_count) != KERN_SUCCESS) - return(EINVAL); + if (thread_setstatus(thread, fs_flavor, fs, fs_count) != KERN_SUCCESS) { + rval = EINVAL; + goto error_ret; - return (EJUSTRETURN); + } +error_ret: + return rval; }