linux-user: move sh4 signal.c parts to sh4 directory

No code change, only move code from signal.c to
sh4/signal.c, except adding includes and
exporting setup_frame() and setup_rt_frame().

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180424192635.6027-5-laurent@vivier.eu>

1 files changed, 0 insertions, 328 deletions

diff --git a/linux-user/signal.c b/linux-user/signal.c
index c99eae15d6..5429c9aa38 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -2364,334 +2364,6 @@ badframe:
     return -TARGET_QEMU_ESIGRETURN;
 }
 
-#elif defined(TARGET_SH4)
-
-/*
- * code and data structures from linux kernel:
- * include/asm-sh/sigcontext.h
- * arch/sh/kernel/signal.c
- */
-
-struct target_sigcontext {
-    target_ulong  oldmask;
-
-    /* CPU registers */
-    target_ulong  sc_gregs[16];
-    target_ulong  sc_pc;
-    target_ulong  sc_pr;
-    target_ulong  sc_sr;
-    target_ulong  sc_gbr;
-    target_ulong  sc_mach;
-    target_ulong  sc_macl;
-
-    /* FPU registers */
-    target_ulong  sc_fpregs[16];
-    target_ulong  sc_xfpregs[16];
-    unsigned int sc_fpscr;
-    unsigned int sc_fpul;
-    unsigned int sc_ownedfp;
-};
-
-struct target_sigframe
-{
-    struct target_sigcontext sc;
-    target_ulong extramask[TARGET_NSIG_WORDS-1];
-    uint16_t retcode[3];
-};
-
-
-struct target_ucontext {
-    target_ulong tuc_flags;
-    struct target_ucontext *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
-{
-    struct target_siginfo info;
-    struct target_ucontext uc;
-    uint16_t retcode[3];
-};
-
-
-#define MOVW(n)  (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
-#define TRAP_NOARG 0xc310         /* Syscall w/no args (NR in R3) SH3/4 */
-
-static abi_ulong get_sigframe(struct target_sigaction *ka,
-                              unsigned long sp, size_t frame_size)
-{
-    if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
-        sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
-    }
-
-    return (sp - frame_size) & -8ul;
-}
-
-/* Notice when we're in the middle of a gUSA region and reset.
-   Note that this will only occur for !parallel_cpus, as we will
-   translate such sequences differently in a parallel context.  */
-static void unwind_gusa(CPUSH4State *regs)
-{
-    /* If the stack pointer is sufficiently negative, and we haven't
-       completed the sequence, then reset to the entry to the region.  */
-    /* ??? The SH4 kernel checks for and address above 0xC0000000.
-       However, the page mappings in qemu linux-user aren't as restricted
-       and we wind up with the normal stack mapped above 0xF0000000.
-       That said, there is no reason why the kernel should be allowing
-       a gUSA region that spans 1GB.  Use a tighter check here, for what
-       can actually be enabled by the immediate move.  */
-    if (regs->gregs[15] >= -128u && regs->pc < regs->gregs[0]) {
-        /* Reset the PC to before the gUSA region, as computed from
-           R0 = region end, SP = -(region size), plus one more for the
-           insn that actually initializes SP to the region size.  */
-        regs->pc = regs->gregs[0] + regs->gregs[15] - 2;
-
-        /* Reset the SP to the saved version in R1.  */
-        regs->gregs[15] = regs->gregs[1];
-    }
-}
-
-static void setup_sigcontext(struct target_sigcontext *sc,
-                             CPUSH4State *regs, unsigned long mask)
-{
-    int i;
-
-#define COPY(x)         __put_user(regs->x, &sc->sc_##x)
-    COPY(gregs[0]); COPY(gregs[1]);
-    COPY(gregs[2]); COPY(gregs[3]);
-    COPY(gregs[4]); COPY(gregs[5]);
-    COPY(gregs[6]); COPY(gregs[7]);
-    COPY(gregs[8]); COPY(gregs[9]);
-    COPY(gregs[10]); COPY(gregs[11]);
-    COPY(gregs[12]); COPY(gregs[13]);
-    COPY(gregs[14]); COPY(gregs[15]);
-    COPY(gbr); COPY(mach);
-    COPY(macl); COPY(pr);
-    COPY(sr); COPY(pc);
-#undef COPY
-
-    for (i=0; i<16; i++) {
-        __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
-    }
-    __put_user(regs->fpscr, &sc->sc_fpscr);
-    __put_user(regs->fpul, &sc->sc_fpul);
-
-    /* non-iBCS2 extensions.. */
-    __put_user(mask, &sc->oldmask);
-}
-
-static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc)
-{
-    int i;
-
-#define COPY(x)         __get_user(regs->x, &sc->sc_##x)
-    COPY(gregs[0]); COPY(gregs[1]);
-    COPY(gregs[2]); COPY(gregs[3]);
-    COPY(gregs[4]); COPY(gregs[5]);
-    COPY(gregs[6]); COPY(gregs[7]);
-    COPY(gregs[8]); COPY(gregs[9]);
-    COPY(gregs[10]); COPY(gregs[11]);
-    COPY(gregs[12]); COPY(gregs[13]);
-    COPY(gregs[14]); COPY(gregs[15]);
-    COPY(gbr); COPY(mach);
-    COPY(macl); COPY(pr);
-    COPY(sr); COPY(pc);
-#undef COPY
-
-    for (i=0; i<16; i++) {
-        __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
-    }
-    __get_user(regs->fpscr, &sc->sc_fpscr);
-    __get_user(regs->fpul, &sc->sc_fpul);
-
-    regs->tra = -1;         /* disable syscall checks */
-    regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
-}
-
-static void setup_frame(int sig, struct target_sigaction *ka,
-                        target_sigset_t *set, CPUSH4State *regs)
-{
-    struct target_sigframe *frame;
-    abi_ulong frame_addr;
-    int i;
-
-    unwind_gusa(regs);
-
-    frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
-    trace_user_setup_frame(regs, frame_addr);
-    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
-        goto give_sigsegv;
-    }
-
-    setup_sigcontext(&frame->sc, regs, set->sig[0]);
-
-    for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
-        __put_user(set->sig[i + 1], &frame->extramask[i]);
-    }
-
-    /* Set up to return from userspace.  If provided, use a stub
-       already in userspace.  */
-    if (ka->sa_flags & TARGET_SA_RESTORER) {
-        regs->pr = (unsigned long) ka->sa_restorer;
-    } else {
-        /* Generate return code (system call to sigreturn) */
-        abi_ulong retcode_addr = frame_addr +
-                                 offsetof(struct target_sigframe, retcode);
-        __put_user(MOVW(2), &frame->retcode[0]);
-        __put_user(TRAP_NOARG, &frame->retcode[1]);
-        __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
-        regs->pr = (unsigned long) retcode_addr;
-    }
-
-    /* Set up registers for signal handler */
-    regs->gregs[15] = frame_addr;
-    regs->gregs[4] = sig; /* Arg for signal handler */
-    regs->gregs[5] = 0;
-    regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
-    regs->pc = (unsigned long) ka->_sa_handler;
-    regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
-
-    unlock_user_struct(frame, frame_addr, 1);
-    return;
-
-give_sigsegv:
-    unlock_user_struct(frame, frame_addr, 1);
-    force_sigsegv(sig);
-}
-
-static void setup_rt_frame(int sig, struct target_sigaction *ka,
-                           target_siginfo_t *info,
-                           target_sigset_t *set, CPUSH4State *regs)
-{
-    struct target_rt_sigframe *frame;
-    abi_ulong frame_addr;
-    int i;
-
-    unwind_gusa(regs);
-
-    frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
-    trace_user_setup_rt_frame(regs, frame_addr);
-    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
-        goto give_sigsegv;
-    }
-
-    tswap_siginfo(&frame->info, info);
-
-    /* Create the ucontext.  */
-    __put_user(0, &frame->uc.tuc_flags);
-    __put_user(0, (unsigned long *)&frame->uc.tuc_link);
-    __put_user((unsigned long)target_sigaltstack_used.ss_sp,
-               &frame->uc.tuc_stack.ss_sp);
-    __put_user(sas_ss_flags(regs->gregs[15]),
-               &frame->uc.tuc_stack.ss_flags);
-    __put_user(target_sigaltstack_used.ss_size,
-               &frame->uc.tuc_stack.ss_size);
-    setup_sigcontext(&frame->uc.tuc_mcontext,
-                     regs, set->sig[0]);
-    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.  If provided, use a stub
-       already in userspace.  */
-    if (ka->sa_flags & TARGET_SA_RESTORER) {
-        regs->pr = (unsigned long) ka->sa_restorer;
-    } else {
-        /* Generate return code (system call to sigreturn) */
-        abi_ulong retcode_addr = frame_addr +
-                                 offsetof(struct target_rt_sigframe, retcode);
-        __put_user(MOVW(2), &frame->retcode[0]);
-        __put_user(TRAP_NOARG, &frame->retcode[1]);
-        __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
-        regs->pr = (unsigned long) retcode_addr;
-    }
-
-    /* Set up registers for signal handler */
-    regs->gregs[15] = frame_addr;
-    regs->gregs[4] = sig; /* Arg for signal handler */
-    regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
-    regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
-    regs->pc = (unsigned long) ka->_sa_handler;
-    regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
-
-    unlock_user_struct(frame, frame_addr, 1);
-    return;
-
-give_sigsegv:
-    unlock_user_struct(frame, frame_addr, 1);
-    force_sigsegv(sig);
-}
-
-long do_sigreturn(CPUSH4State *regs)
-{
-    struct target_sigframe *frame;
-    abi_ulong frame_addr;
-    sigset_t blocked;
-    target_sigset_t target_set;
-    int i;
-    int err = 0;
-
-    frame_addr = regs->gregs[15];
-    trace_user_do_sigreturn(regs, frame_addr);
-    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
-        goto badframe;
-    }
-
-    __get_user(target_set.sig[0], &frame->sc.oldmask);
-    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
-        __get_user(target_set.sig[i], &frame->extramask[i - 1]);
-    }
-
-    if (err)
-        goto badframe;
-
-    target_to_host_sigset_internal(&blocked, &target_set);
-    set_sigmask(&blocked);
-
-    restore_sigcontext(regs, &frame->sc);
-
-    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;
-}
-
-long do_rt_sigreturn(CPUSH4State *regs)
-{
-    struct target_rt_sigframe *frame;
-    abi_ulong frame_addr;
-    sigset_t blocked;
-
-    frame_addr = regs->gregs[15];
-    trace_user_do_rt_sigreturn(regs, frame_addr);
-    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
-        goto badframe;
-    }
-
-    target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
-    set_sigmask(&blocked);
-
-    restore_sigcontext(regs, &frame->uc.tuc_mcontext);
-
-    if (do_sigaltstack(frame_addr +
-                       offsetof(struct target_rt_sigframe, uc.tuc_stack),
-                       0, get_sp_from_cpustate(regs)) == -EFAULT) {
-        goto badframe;
-    }
-
-    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;
-}
 #elif defined(TARGET_MICROBLAZE)
 
 struct target_sigcontext {