From 17853172f7c3abaa6f1fa65c9c01104539da3a03 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Tue, 24 Apr 2018 21:26:23 +0200 Subject: linux-user: move openrisc signal.c parts to openrisc directory MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit No code change, only move code from signal.c to openrisc/signal.c, except adding includes and exporting setup_rt_frame(). Signed-off-by: Laurent Vivier Reviewed-by: Alex Bennée Reviewed-by: Richard Henderson Message-Id: <20180424192635.6027-9-laurent@vivier.eu> --- linux-user/signal.c | 211 ---------------------------------------------------- 1 file changed, 211 deletions(-) (limited to 'linux-user/signal.c') diff --git a/linux-user/signal.c b/linux-user/signal.c index e943980ade..dd85209ef9 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -2364,217 +2364,6 @@ badframe: return -TARGET_QEMU_ESIGRETURN; } -#elif defined(TARGET_OPENRISC) - -struct target_sigcontext { - struct target_pt_regs regs; - abi_ulong oldmask; - abi_ulong usp; -}; - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -struct target_rt_sigframe { - abi_ulong pinfo; - uint64_t puc; - struct target_siginfo info; - struct target_sigcontext sc; - struct target_ucontext uc; - unsigned char retcode[16]; /* trampoline code */ -}; - -/* This is the asm-generic/ucontext.h version */ -#if 0 -static int restore_sigcontext(CPUOpenRISCState *regs, - struct target_sigcontext *sc) -{ - unsigned int err = 0; - unsigned long old_usp; - - /* Alwys make any pending restarted system call return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - /* restore the regs from &sc->regs (same as sc, since regs is first) - * (sc is already checked for VERIFY_READ since the sigframe was - * checked in sys_sigreturn previously) - */ - - if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) { - goto badframe; - } - - /* make sure the U-flag is set so user-mode cannot fool us */ - - regs->sr &= ~SR_SM; - - /* restore the old USP as it was before we stacked the sc etc. - * (we cannot just pop the sigcontext since we aligned the sp and - * stuff after pushing it) - */ - - __get_user(old_usp, &sc->usp); - phx_signal("old_usp 0x%lx", old_usp); - - __PHX__ REALLY /* ??? */ - wrusp(old_usp); - regs->gpr[1] = old_usp; - - /* TODO: the other ports use regs->orig_XX to disable syscall checks - * after this completes, but we don't use that mechanism. maybe we can - * use it now ? - */ - - return err; - -badframe: - return 1; -} -#endif - -/* Set up a signal frame. */ - -static void setup_sigcontext(struct target_sigcontext *sc, - CPUOpenRISCState *regs, - unsigned long mask) -{ - unsigned long usp = cpu_get_gpr(regs, 1); - - /* copy the regs. they are first in sc so we can use sc directly */ - - /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/ - - /* Set the frametype to CRIS_FRAME_NORMAL for the execution of - the signal handler. The frametype will be restored to its previous - value in restore_sigcontext. */ - /*regs->frametype = CRIS_FRAME_NORMAL;*/ - - /* then some other stuff */ - __put_user(mask, &sc->oldmask); - __put_user(usp, &sc->usp); -} - -static inline unsigned long align_sigframe(unsigned long sp) -{ - return sp & ~3UL; -} - -static inline abi_ulong get_sigframe(struct target_sigaction *ka, - CPUOpenRISCState *regs, - size_t frame_size) -{ - unsigned long sp = cpu_get_gpr(regs, 1); - int onsigstack = on_sig_stack(sp); - - /* redzone */ - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - sp = align_sigframe(sp - frame_size); - - /* - * If we are on the alternate signal stack and would overflow it, don't. - * Return an always-bogus address instead so we will die with SIGSEGV. - */ - - if (onsigstack && !likely(on_sig_stack(sp))) { - return -1L; - } - - return sp; -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUOpenRISCState *env) -{ - int err = 0; - abi_ulong frame_addr; - unsigned long return_ip; - struct target_rt_sigframe *frame; - abi_ulong info_addr, uc_addr; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - trace_user_setup_rt_frame(env, frame_addr); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { - goto give_sigsegv; - } - - info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); - __put_user(info_addr, &frame->pinfo); - uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); - __put_user(uc_addr, &frame->puc); - - if (ka->sa_flags & SA_SIGINFO) { - tswap_siginfo(&frame->info, info); - } - - /*err |= __clear_user(&frame->uc, offsetof(ucontext_t, uc_mcontext));*/ - __put_user(0, &frame->uc.tuc_flags); - __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(cpu_get_gpr(env, 1)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - setup_sigcontext(&frame->sc, env, set->sig[0]); - - /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/ - - /* trampoline - the desired return ip is the retcode itself */ - return_ip = (unsigned long)&frame->retcode; - /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */ - __put_user(0xa960, (short *)(frame->retcode + 0)); - __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2)); - __put_user(0x20000001, (unsigned long *)(frame->retcode + 4)); - __put_user(0x15000000, (unsigned long *)(frame->retcode + 8)); - - if (err) { - goto give_sigsegv; - } - - /* TODO what is the current->exec_domain stuff and invmap ? */ - - /* Set up registers for signal handler */ - env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */ - cpu_set_gpr(env, 9, (unsigned long)return_ip); /* what we enter LATER */ - cpu_set_gpr(env, 3, (unsigned long)sig); /* arg 1: signo */ - cpu_set_gpr(env, 4, (unsigned long)&frame->info); /* arg 2: (siginfo_t*) */ - cpu_set_gpr(env, 5, (unsigned long)&frame->uc); /* arg 3: ucontext */ - - /* actually move the usp to reflect the stacked frame */ - cpu_set_gpr(env, 1, (unsigned long)frame); - - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sigsegv(sig); -} - -long do_sigreturn(CPUOpenRISCState *env) -{ - trace_user_do_sigreturn(env, 0); - fprintf(stderr, "do_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -long do_rt_sigreturn(CPUOpenRISCState *env) -{ - trace_user_do_rt_sigreturn(env, 0); - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} -/* TARGET_OPENRISC */ - #elif defined(TARGET_S390X) #define __NUM_GPRS 16 -- cgit v1.2.3