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

No code change, only move code from signal.c to
riscv/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: <20180424192635.6027-14-laurent@vivier.eu>

1 files changed, 0 insertions, 197 deletions

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 5a3e5bff5e..b42fe4ff93 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -3032,203 +3032,6 @@ sigsegv:
     return -TARGET_QEMU_ESIGRETURN;
 }
 
-#elif defined(TARGET_RISCV)
-
-/* Signal handler invocation must be transparent for the code being
-   interrupted. Complete CPU (hart) state is saved on entry and restored
-   before returning from the handler. Process sigmask is also saved to block
-   signals while the handler is running. The handler gets its own stack,
-   which also doubles as storage for the CPU state and sigmask.
-
-   The code below is qemu re-implementation of arch/riscv/kernel/signal.c */
-
-struct target_sigcontext {
-    abi_long pc;
-    abi_long gpr[31]; /* x0 is not present, so all offsets must be -1 */
-    uint64_t fpr[32];
-    uint32_t fcsr;
-}; /* cf. riscv-linux:arch/riscv/include/uapi/asm/ptrace.h */
-
-struct target_ucontext {
-    unsigned long uc_flags;
-    struct target_ucontext *uc_link;
-    target_stack_t uc_stack;
-    struct target_sigcontext uc_mcontext;
-    target_sigset_t uc_sigmask;
-};
-
-struct target_rt_sigframe {
-    uint32_t tramp[2]; /* not in kernel, which uses VDSO instead */
-    struct target_siginfo info;
-    struct target_ucontext uc;
-};
-
-static abi_ulong get_sigframe(struct target_sigaction *ka,
-                              CPURISCVState *regs, size_t framesize)
-{
-    abi_ulong sp = regs->gpr[xSP];
-    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 -= framesize;
-    sp &= ~3UL; /* align sp on 4-byte boundary */
-
-    /* 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_sigcontext(struct target_sigcontext *sc, CPURISCVState *env)
-{
-    int i;
-
-    __put_user(env->pc, &sc->pc);
-
-    for (i = 1; i < 32; i++) {
-        __put_user(env->gpr[i], &sc->gpr[i - 1]);
-    }
-    for (i = 0; i < 32; i++) {
-        __put_user(env->fpr[i], &sc->fpr[i]);
-    }
-
-    uint32_t fcsr = csr_read_helper(env, CSR_FCSR); /*riscv_get_fcsr(env);*/
-    __put_user(fcsr, &sc->fcsr);
-}
-
-static void setup_ucontext(struct target_ucontext *uc,
-                           CPURISCVState *env, target_sigset_t *set)
-{
-    abi_ulong ss_sp = (target_ulong)target_sigaltstack_used.ss_sp;
-    abi_ulong ss_flags = sas_ss_flags(env->gpr[xSP]);
-    abi_ulong ss_size = target_sigaltstack_used.ss_size;
-
-    __put_user(0,    &(uc->uc_flags));
-    __put_user(0,    &(uc->uc_link));
-
-    __put_user(ss_sp,    &(uc->uc_stack.ss_sp));
-    __put_user(ss_flags, &(uc->uc_stack.ss_flags));
-    __put_user(ss_size,  &(uc->uc_stack.ss_size));
-
-    int i;
-    for (i = 0; i < TARGET_NSIG_WORDS; i++) {
-        __put_user(set->sig[i], &(uc->uc_sigmask.sig[i]));
-    }
-
-    setup_sigcontext(&uc->uc_mcontext, env);
-}
-
-static inline void install_sigtramp(uint32_t *tramp)
-{
-    __put_user(0x08b00893, tramp + 0);  /* li a7, 139 = __NR_rt_sigreturn */
-    __put_user(0x00000073, tramp + 1);  /* ecall */
-}
-
-static void setup_rt_frame(int sig, struct target_sigaction *ka,
-                           target_siginfo_t *info,
-                           target_sigset_t *set, CPURISCVState *env)
-{
-    abi_ulong frame_addr;
-    struct target_rt_sigframe *frame;
-
-    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 badframe;
-    }
-
-    setup_ucontext(&frame->uc, env, set);
-    tswap_siginfo(&frame->info, info);
-    install_sigtramp(frame->tramp);
-
-    env->pc = ka->_sa_handler;
-    env->gpr[xSP] = frame_addr;
-    env->gpr[xA0] = sig;
-    env->gpr[xA1] = frame_addr + offsetof(struct target_rt_sigframe, info);
-    env->gpr[xA2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
-    env->gpr[xRA] = frame_addr + offsetof(struct target_rt_sigframe, tramp);
-
-    return;
-
-badframe:
-    unlock_user_struct(frame, frame_addr, 1);
-    if (sig == TARGET_SIGSEGV) {
-        ka->_sa_handler = TARGET_SIG_DFL;
-    }
-    force_sig(TARGET_SIGSEGV);
-}
-
-static void restore_sigcontext(CPURISCVState *env, struct target_sigcontext *sc)
-{
-    int i;
-
-    __get_user(env->pc, &sc->pc);
-
-    for (i = 1; i < 32; ++i) {
-        __get_user(env->gpr[i], &sc->gpr[i - 1]);
-    }
-    for (i = 0; i < 32; ++i) {
-        __get_user(env->fpr[i], &sc->fpr[i]);
-    }
-
-    uint32_t fcsr;
-    __get_user(fcsr, &sc->fcsr);
-    csr_write_helper(env, fcsr, CSR_FCSR);
-}
-
-static void restore_ucontext(CPURISCVState *env, struct target_ucontext *uc)
-{
-    sigset_t blocked;
-    target_sigset_t target_set;
-    int i;
-
-    target_sigemptyset(&target_set);
-    for (i = 0; i < TARGET_NSIG_WORDS; i++) {
-        __get_user(target_set.sig[i], &(uc->uc_sigmask.sig[i]));
-    }
-
-    target_to_host_sigset_internal(&blocked, &target_set);
-    set_sigmask(&blocked);
-
-    restore_sigcontext(env, &uc->uc_mcontext);
-}
-
-long do_rt_sigreturn(CPURISCVState *env)
-{
-    struct target_rt_sigframe *frame;
-    abi_ulong frame_addr;
-
-    frame_addr = env->gpr[xSP];
-    trace_user_do_sigreturn(env, frame_addr);
-    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
-        goto badframe;
-    }
-
-    restore_ucontext(env, &frame->uc);
-
-    if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
-            uc.uc_stack), 0, get_sp_from_cpustate(env)) == -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 0;
-}
-
 #elif defined(TARGET_HPPA)
 
 struct target_sigcontext {