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aca77d5e59
No code change, only move code from signal.c to hppa/signal.c, except adding includes and exporting setup_rt_frame(). Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20180424192635.6027-15-laurent@vivier.eu>
211 lines
6.0 KiB
C
211 lines
6.0 KiB
C
/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu.h"
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#include "target_signal.h"
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#include "signal-common.h"
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#include "linux-user/trace.h"
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struct target_sigcontext {
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abi_ulong sc_flags;
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abi_ulong sc_gr[32];
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uint64_t sc_fr[32];
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abi_ulong sc_iasq[2];
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abi_ulong sc_iaoq[2];
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abi_ulong sc_sar;
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};
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struct target_ucontext {
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abi_uint tuc_flags;
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abi_ulong tuc_link;
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target_stack_t tuc_stack;
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abi_uint pad[1];
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask;
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};
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struct target_rt_sigframe {
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abi_uint tramp[9];
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target_siginfo_t info;
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struct target_ucontext uc;
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/* hidden location of upper halves of pa2.0 64-bit gregs */
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};
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static void setup_sigcontext(struct target_sigcontext *sc, CPUArchState *env)
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{
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int flags = 0;
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int i;
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/* ??? if on_sig_stack, flags |= 1 (PARISC_SC_FLAG_ONSTACK). */
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if (env->iaoq_f < TARGET_PAGE_SIZE) {
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/* In the gateway page, executing a syscall. */
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flags |= 2; /* PARISC_SC_FLAG_IN_SYSCALL */
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__put_user(env->gr[31], &sc->sc_iaoq[0]);
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__put_user(env->gr[31] + 4, &sc->sc_iaoq[1]);
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} else {
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__put_user(env->iaoq_f, &sc->sc_iaoq[0]);
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__put_user(env->iaoq_b, &sc->sc_iaoq[1]);
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}
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__put_user(0, &sc->sc_iasq[0]);
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__put_user(0, &sc->sc_iasq[1]);
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__put_user(flags, &sc->sc_flags);
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__put_user(cpu_hppa_get_psw(env), &sc->sc_gr[0]);
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for (i = 1; i < 32; ++i) {
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__put_user(env->gr[i], &sc->sc_gr[i]);
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}
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__put_user((uint64_t)env->fr0_shadow << 32, &sc->sc_fr[0]);
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for (i = 1; i < 32; ++i) {
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__put_user(env->fr[i], &sc->sc_fr[i]);
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}
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__put_user(env->cr[CR_SAR], &sc->sc_sar);
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}
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static void restore_sigcontext(CPUArchState *env, struct target_sigcontext *sc)
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{
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target_ulong psw;
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int i;
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__get_user(psw, &sc->sc_gr[0]);
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cpu_hppa_put_psw(env, psw);
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for (i = 1; i < 32; ++i) {
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__get_user(env->gr[i], &sc->sc_gr[i]);
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}
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for (i = 0; i < 32; ++i) {
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__get_user(env->fr[i], &sc->sc_fr[i]);
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}
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cpu_hppa_loaded_fr0(env);
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__get_user(env->iaoq_f, &sc->sc_iaoq[0]);
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__get_user(env->iaoq_b, &sc->sc_iaoq[1]);
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__get_user(env->cr[CR_SAR], &sc->sc_sar);
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}
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/* No, this doesn't look right, but it's copied straight from the kernel. */
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#define PARISC_RT_SIGFRAME_SIZE32 \
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((sizeof(struct target_rt_sigframe) + 48 + 64) & -64)
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void setup_rt_frame(int sig, struct target_sigaction *ka,
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target_siginfo_t *info,
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target_sigset_t *set, CPUArchState *env)
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{
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abi_ulong frame_addr, sp, haddr;
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struct target_rt_sigframe *frame;
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int i;
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sp = env->gr[30];
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if (ka->sa_flags & TARGET_SA_ONSTACK) {
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if (sas_ss_flags(sp) == 0) {
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sp = (target_sigaltstack_used.ss_sp + 0x7f) & ~0x3f;
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}
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}
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frame_addr = QEMU_ALIGN_UP(sp, 64);
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sp = frame_addr + PARISC_RT_SIGFRAME_SIZE32;
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trace_user_setup_rt_frame(env, frame_addr);
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if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
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goto give_sigsegv;
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}
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tswap_siginfo(&frame->info, info);
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frame->uc.tuc_flags = 0;
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frame->uc.tuc_link = 0;
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__put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
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__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
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&frame->uc.tuc_stack.ss_flags);
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__put_user(target_sigaltstack_used.ss_size,
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&frame->uc.tuc_stack.ss_size);
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for (i = 0; i < TARGET_NSIG_WORDS; i++) {
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__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
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}
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setup_sigcontext(&frame->uc.tuc_mcontext, env);
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__put_user(0x34190000, frame->tramp + 0); /* ldi 0,%r25 */
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__put_user(0x3414015a, frame->tramp + 1); /* ldi __NR_rt_sigreturn,%r20 */
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__put_user(0xe4008200, frame->tramp + 2); /* be,l 0x100(%sr2,%r0) */
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__put_user(0x08000240, frame->tramp + 3); /* nop */
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unlock_user_struct(frame, frame_addr, 1);
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env->gr[2] = h2g(frame->tramp);
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env->gr[30] = sp;
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env->gr[26] = sig;
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env->gr[25] = h2g(&frame->info);
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env->gr[24] = h2g(&frame->uc);
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haddr = ka->_sa_handler;
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if (haddr & 2) {
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/* Function descriptor. */
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target_ulong *fdesc, dest;
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haddr &= -4;
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if (!lock_user_struct(VERIFY_READ, fdesc, haddr, 1)) {
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goto give_sigsegv;
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}
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__get_user(dest, fdesc);
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__get_user(env->gr[19], fdesc + 1);
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unlock_user_struct(fdesc, haddr, 1);
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haddr = dest;
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}
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env->iaoq_f = haddr;
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env->iaoq_b = haddr + 4;
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return;
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give_sigsegv:
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force_sigsegv(sig);
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}
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long do_rt_sigreturn(CPUArchState *env)
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{
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abi_ulong frame_addr = env->gr[30] - PARISC_RT_SIGFRAME_SIZE32;
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struct target_rt_sigframe *frame;
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sigset_t set;
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trace_user_do_rt_sigreturn(env, frame_addr);
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if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
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goto badframe;
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}
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target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
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set_sigmask(&set);
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restore_sigcontext(env, &frame->uc.tuc_mcontext);
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unlock_user_struct(frame, frame_addr, 0);
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if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
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uc.tuc_stack),
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0, env->gr[30]) == -EFAULT) {
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goto badframe;
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}
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unlock_user_struct(frame, frame_addr, 0);
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return -TARGET_QEMU_ESIGRETURN;
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badframe:
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force_sig(TARGET_SIGSEGV);
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return -TARGET_QEMU_ESIGRETURN;
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}
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