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Diffstat (limited to 'linux-user/signal.c')
-rw-r--r--linux-user/signal.c197
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 {
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 09:36:44 +0000