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-rw-r--r--linux-user/m68k/signal.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/linux-user/m68k/signal.c b/linux-user/m68k/signal.c
new file mode 100644
index 000000000..ec33482e1
--- /dev/null
+++ b/linux-user/m68k/signal.c
@@ -0,0 +1,410 @@
+/*
+ * Emulation of Linux signals
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu.h"
+#include "user-internals.h"
+#include "signal-common.h"
+#include "linux-user/trace.h"
+
+struct target_sigcontext {
+ abi_ulong sc_mask;
+ abi_ulong sc_usp;
+ abi_ulong sc_d0;
+ abi_ulong sc_d1;
+ abi_ulong sc_a0;
+ abi_ulong sc_a1;
+ unsigned short sc_sr;
+ abi_ulong sc_pc;
+};
+
+struct target_sigframe
+{
+ abi_ulong pretcode;
+ int sig;
+ int code;
+ abi_ulong psc;
+ abi_ulong extramask[TARGET_NSIG_WORDS-1];
+ struct target_sigcontext sc;
+};
+
+typedef int target_greg_t;
+#define TARGET_NGREG 18
+typedef target_greg_t target_gregset_t[TARGET_NGREG];
+
+typedef struct target_fpregset {
+ int f_fpcntl[3];
+ int f_fpregs[8*3];
+} target_fpregset_t;
+
+struct target_mcontext {
+ int version;
+ target_gregset_t gregs;
+ target_fpregset_t fpregs;
+};
+
+#define TARGET_MCONTEXT_VERSION 2
+
+struct target_ucontext {
+ abi_ulong tuc_flags;
+ abi_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_mcontext tuc_mcontext;
+ abi_long tuc_filler[80];
+ target_sigset_t tuc_sigmask;
+};
+
+struct target_rt_sigframe
+{
+ abi_ulong pretcode;
+ int sig;
+ abi_ulong pinfo;
+ abi_ulong puc;
+ struct target_siginfo info;
+ struct target_ucontext uc;
+};
+
+static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
+ abi_ulong mask)
+{
+ uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);
+ __put_user(mask, &sc->sc_mask);
+ __put_user(env->aregs[7], &sc->sc_usp);
+ __put_user(env->dregs[0], &sc->sc_d0);
+ __put_user(env->dregs[1], &sc->sc_d1);
+ __put_user(env->aregs[0], &sc->sc_a0);
+ __put_user(env->aregs[1], &sc->sc_a1);
+ __put_user(sr, &sc->sc_sr);
+ __put_user(env->pc, &sc->sc_pc);
+}
+
+static void
+restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc)
+{
+ int temp;
+
+ __get_user(env->aregs[7], &sc->sc_usp);
+ __get_user(env->dregs[0], &sc->sc_d0);
+ __get_user(env->dregs[1], &sc->sc_d1);
+ __get_user(env->aregs[0], &sc->sc_a0);
+ __get_user(env->aregs[1], &sc->sc_a1);
+ __get_user(env->pc, &sc->sc_pc);
+ __get_user(temp, &sc->sc_sr);
+ cpu_m68k_set_ccr(env, temp);
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline abi_ulong
+get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
+ size_t frame_size)
+{
+ abi_ulong sp;
+
+ sp = target_sigsp(get_sp_from_cpustate(regs), ka);
+
+
+ return ((sp - frame_size) & -8UL);
+}
+
+void setup_frame(int sig, struct target_sigaction *ka,
+ target_sigset_t *set, CPUM68KState *env)
+{
+ struct target_sigframe *frame;
+ abi_ulong frame_addr;
+ abi_ulong sc_addr;
+ int i;
+
+ frame_addr = get_sigframe(ka, env, sizeof *frame);
+ trace_user_setup_frame(env, frame_addr);
+ if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
+ goto give_sigsegv;
+ }
+
+ __put_user(sig, &frame->sig);
+
+ sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
+ __put_user(sc_addr, &frame->psc);
+
+ setup_sigcontext(&frame->sc, env, set->sig[0]);
+
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ __put_user(set->sig[i], &frame->extramask[i - 1]);
+ }
+
+ /* Set up to return from userspace. */
+ __put_user(default_sigreturn, &frame->pretcode);
+
+ env->aregs[7] = frame_addr;
+ env->pc = ka->_sa_handler;
+
+ unlock_user_struct(frame, frame_addr, 1);
+ return;
+
+give_sigsegv:
+ force_sigsegv(sig);
+}
+
+static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
+ CPUM68KState *env)
+{
+ int i;
+ target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
+
+ __put_user(env->fpcr, &fpregs->f_fpcntl[0]);
+ __put_user(env->fpsr, &fpregs->f_fpcntl[1]);
+ /* fpiar is not emulated */
+
+ for (i = 0; i < 8; i++) {
+ uint32_t high = env->fregs[i].d.high << 16;
+ __put_user(high, &fpregs->f_fpregs[i * 3]);
+ __put_user(env->fregs[i].d.low,
+ (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
+ }
+}
+
+static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
+ CPUM68KState *env)
+{
+ target_greg_t *gregs = uc->tuc_mcontext.gregs;
+ uint32_t sr = (env->sr & 0xff00) | cpu_m68k_get_ccr(env);
+
+ __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
+ __put_user(env->dregs[0], &gregs[0]);
+ __put_user(env->dregs[1], &gregs[1]);
+ __put_user(env->dregs[2], &gregs[2]);
+ __put_user(env->dregs[3], &gregs[3]);
+ __put_user(env->dregs[4], &gregs[4]);
+ __put_user(env->dregs[5], &gregs[5]);
+ __put_user(env->dregs[6], &gregs[6]);
+ __put_user(env->dregs[7], &gregs[7]);
+ __put_user(env->aregs[0], &gregs[8]);
+ __put_user(env->aregs[1], &gregs[9]);
+ __put_user(env->aregs[2], &gregs[10]);
+ __put_user(env->aregs[3], &gregs[11]);
+ __put_user(env->aregs[4], &gregs[12]);
+ __put_user(env->aregs[5], &gregs[13]);
+ __put_user(env->aregs[6], &gregs[14]);
+ __put_user(env->aregs[7], &gregs[15]);
+ __put_user(env->pc, &gregs[16]);
+ __put_user(sr, &gregs[17]);
+
+ target_rt_save_fpu_state(uc, env);
+
+ return 0;
+}
+
+static inline void target_rt_restore_fpu_state(CPUM68KState *env,
+ struct target_ucontext *uc)
+{
+ int i;
+ target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
+ uint32_t fpcr;
+
+ __get_user(fpcr, &fpregs->f_fpcntl[0]);
+ cpu_m68k_set_fpcr(env, fpcr);
+ __get_user(env->fpsr, &fpregs->f_fpcntl[1]);
+ /* fpiar is not emulated */
+
+ for (i = 0; i < 8; i++) {
+ uint32_t high;
+ __get_user(high, &fpregs->f_fpregs[i * 3]);
+ env->fregs[i].d.high = high >> 16;
+ __get_user(env->fregs[i].d.low,
+ (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
+ }
+}
+
+static inline int target_rt_restore_ucontext(CPUM68KState *env,
+ struct target_ucontext *uc)
+{
+ int temp;
+ target_greg_t *gregs = uc->tuc_mcontext.gregs;
+
+ __get_user(temp, &uc->tuc_mcontext.version);
+ if (temp != TARGET_MCONTEXT_VERSION)
+ goto badframe;
+
+ /* restore passed registers */
+ __get_user(env->dregs[0], &gregs[0]);
+ __get_user(env->dregs[1], &gregs[1]);
+ __get_user(env->dregs[2], &gregs[2]);
+ __get_user(env->dregs[3], &gregs[3]);
+ __get_user(env->dregs[4], &gregs[4]);
+ __get_user(env->dregs[5], &gregs[5]);
+ __get_user(env->dregs[6], &gregs[6]);
+ __get_user(env->dregs[7], &gregs[7]);
+ __get_user(env->aregs[0], &gregs[8]);
+ __get_user(env->aregs[1], &gregs[9]);
+ __get_user(env->aregs[2], &gregs[10]);
+ __get_user(env->aregs[3], &gregs[11]);
+ __get_user(env->aregs[4], &gregs[12]);
+ __get_user(env->aregs[5], &gregs[13]);
+ __get_user(env->aregs[6], &gregs[14]);
+ __get_user(env->aregs[7], &gregs[15]);
+ __get_user(env->pc, &gregs[16]);
+ __get_user(temp, &gregs[17]);
+ cpu_m68k_set_ccr(env, temp);
+
+ target_rt_restore_fpu_state(env, uc);
+
+ return 0;
+
+badframe:
+ return 1;
+}
+
+void setup_rt_frame(int sig, struct target_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUM68KState *env)
+{
+ struct target_rt_sigframe *frame;
+ abi_ulong frame_addr;
+ abi_ulong info_addr;
+ abi_ulong uc_addr;
+ int err = 0;
+ int i;
+
+ 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;
+ }
+
+ __put_user(sig, &frame->sig);
+
+ 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);
+
+ tswap_siginfo(&frame->info, info);
+
+ /* Create the ucontext */
+
+ __put_user(0, &frame->uc.tuc_flags);
+ __put_user(0, &frame->uc.tuc_link);
+ target_save_altstack(&frame->uc.tuc_stack, env);
+ err |= target_rt_setup_ucontext(&frame->uc, env);
+
+ if (err)
+ goto give_sigsegv;
+
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
+ }
+
+ /* Set up to return from userspace. */
+ __put_user(default_rt_sigreturn, &frame->pretcode);
+
+ env->aregs[7] = frame_addr;
+ env->pc = ka->_sa_handler;
+
+ unlock_user_struct(frame, frame_addr, 1);
+ return;
+
+give_sigsegv:
+ unlock_user_struct(frame, frame_addr, 1);
+ force_sigsegv(sig);
+}
+
+long do_sigreturn(CPUM68KState *env)
+{
+ struct target_sigframe *frame;
+ abi_ulong frame_addr = env->aregs[7] - 4;
+ target_sigset_t target_set;
+ sigset_t set;
+ int i;
+
+ trace_user_do_sigreturn(env, frame_addr);
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
+
+ /* set blocked signals */
+
+ __get_user(target_set.sig[0], &frame->sc.sc_mask);
+
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ __get_user(target_set.sig[i], &frame->extramask[i - 1]);
+ }
+
+ target_to_host_sigset_internal(&set, &target_set);
+ set_sigmask(&set);
+
+ /* restore registers */
+
+ restore_sigcontext(env, &frame->sc);
+
+ unlock_user_struct(frame, frame_addr, 0);
+ return -TARGET_QEMU_ESIGRETURN;
+
+badframe:
+ force_sig(TARGET_SIGSEGV);
+ return -TARGET_QEMU_ESIGRETURN;
+}
+
+long do_rt_sigreturn(CPUM68KState *env)
+{
+ struct target_rt_sigframe *frame;
+ abi_ulong frame_addr = env->aregs[7] - 4;
+ sigset_t set;
+
+ trace_user_do_rt_sigreturn(env, frame_addr);
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
+
+ target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
+ set_sigmask(&set);
+
+ /* restore registers */
+
+ if (target_rt_restore_ucontext(env, &frame->uc))
+ goto badframe;
+
+ target_restore_altstack(&frame->uc.tuc_stack, env);
+
+ unlock_user_struct(frame, frame_addr, 0);
+ return -TARGET_QEMU_ESIGRETURN;
+
+badframe:
+ unlock_user_struct(frame, frame_addr, 0);
+ force_sig(TARGET_SIGSEGV);
+ return -TARGET_QEMU_ESIGRETURN;
+}
+
+void setup_sigtramp(abi_ulong sigtramp_page)
+{
+ void *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 4 + 6, 0);
+ assert(tramp != NULL);
+
+ default_sigreturn = sigtramp_page;
+
+ /* moveq #,d0; trap #0 */
+ __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), (uint32_t *)tramp);
+
+ default_rt_sigreturn = sigtramp_page + 4;
+
+ /* moveq #,d0; notb d0; trap #0 */
+ __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
+ (uint32_t *)(tramp + 4));
+ __put_user(0x4e40, (uint16_t *)(tramp + 8));
+
+ unlock_user(tramp, sigtramp_page, 4 + 6);
+}