Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
linux-user/sparc/signal.c | 126 ++++++++++++++++++++++++++++++++++++--
1 file changed, 122 insertions(+), 4 deletions(-)
diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c
index 41a8b33bac..362993da02 100644
--- a/linux-user/sparc/signal.c
+++ b/linux-user/sparc/signal.c
@@ -72,6 +72,18 @@ struct target_signal_frame {
abi_ulong rwin_save;
};
+struct target_rt_signal_frame {
+ struct target_stackf ss;
+ target_siginfo_t info;
+ struct target_pt_regs regs;
+ target_sigset_t mask;
+ abi_ulong fpu_save;
+ uint32_t insns[2];
+ target_stack_t stack;
+ abi_ulong extra_size; /* Should be 0 */
+ abi_ulong rwin_save;
+};
+
static abi_ulong get_sigframe(struct target_sigaction *sa,
CPUSPARCState *env,
size_t framesize)
@@ -284,7 +296,59 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUSPARCState *env)
{
- qemu_log_mask(LOG_UNIMP, "setup_rt_frame: not implemented\n");
+ abi_ulong sf_addr;
+ struct target_rt_signal_frame *sf;
+ size_t sf_size = sizeof(*sf) + sizeof(struct target_siginfo_fpu);
+
+ sf_addr = get_sigframe(ka, env, sf_size);
+ trace_user_setup_rt_frame(env, sf_addr);
+
+ sf = lock_user(VERIFY_WRITE, sf_addr, sf_size, 0);
+ if (!sf) {
+ force_sigsegv(sig);
+ return;
+ }
+
+ /* 2. Save the current process state */
+ save_reg_win(&sf->ss.win, env);
+ save_pt_regs(&sf->regs, env);
+
+ save_fpu((struct target_siginfo_fpu *)(sf + 1), env);
+ __put_user(sf_addr + sizeof(*sf), &sf->fpu_save);
+
+ __put_user(0, &sf->rwin_save); /* TODO: save_rwin_state */
+
+ tswap_siginfo(&sf->info, info);
+ tswap_sigset(&sf->mask, set);
+ target_save_altstack(&sf->stack, env);
+
+ __put_user(0, &sf->extra_size);
+
+ /* 3. signal handler back-trampoline and parameters */
+ env->regwptr[WREG_SP] = sf_addr;
+ env->regwptr[WREG_O0] = sig;
+ env->regwptr[WREG_O1] =
+ sf_addr + offsetof(struct target_rt_signal_frame, info);
+ env->regwptr[WREG_O2] =
+ sf_addr + offsetof(struct target_rt_signal_frame, regs);
+
+ /* 4. signal handler */
+ env->pc = ka->_sa_handler;
+ env->npc = env->pc + 4;
+
+ /* 5. return to kernel instructions */
+ if (ka->ka_restorer) {
+ env->regwptr[WREG_O7] = ka->ka_restorer;
+ } else {
+ env->regwptr[WREG_O7] =
+ sf_addr + offsetof(struct target_rt_signal_frame, insns) - 2 * 4;
+
+ /* mov __NR_rt_sigreturn, %g1 */
+ __put_user(0x82102065u, &sf->insns[0]);
+ /* t 0x10 */
+ __put_user(0x91d02010u, &sf->insns[1]);
+ }
+ unlock_user(sf, sf_addr, sf_size);
}
long do_sigreturn(CPUSPARCState *env)
@@ -356,9 +420,63 @@ long do_sigreturn(CPUSPARCState *env)
long do_rt_sigreturn(CPUSPARCState *env)
{
- trace_user_do_rt_sigreturn(env, 0);
- qemu_log_mask(LOG_UNIMP, "do_rt_sigreturn: not implemented\n");
- return -TARGET_ENOSYS;
+ abi_ulong sf_addr, tpc, tnpc, ptr;
+ struct target_rt_signal_frame *sf = NULL;
+ sigset_t set;
+
+ sf_addr = get_sp_from_cpustate(env);
+ trace_user_do_rt_sigreturn(env, sf_addr);
+
+ /* 1. Make sure we are not getting garbage from the user */
+ if ((sf_addr & 15) || !lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
+ goto segv_and_exit;
+ }
+
+ /* Validate SP alignment. */
+ __get_user(ptr, &sf->regs.u_regs[8 + WREG_SP]);
+ if ((ptr + TARGET_STACK_BIAS) & 7) {
+ goto segv_and_exit;
+ }
+
+ /* Validate PC and NPC alignment. */
+ __get_user(tpc, &sf->regs.pc);
+ __get_user(tnpc, &sf->regs.npc);
+ if ((tpc | tnpc) & 3) {
+ goto segv_and_exit;
+ }
+
+ /* 2. Restore the state */
+ restore_pt_regs(&sf->regs, env);
+
+ __get_user(ptr, &sf->fpu_save);
+ if (ptr) {
+ struct target_siginfo_fpu *fpu;
+ if ((ptr & 7) || !lock_user_struct(VERIFY_READ, fpu, ptr, 1)) {
+ goto segv_and_exit;
+ }
+ restore_fpu(fpu, env);
+ unlock_user_struct(fpu, ptr, 0);
+ }
+
+ __get_user(ptr, &sf->rwin_save);
+ if (ptr) {
+ goto segv_and_exit; /* TODO: restore_rwin_state */
+ }
+
+ target_restore_altstack(&sf->stack, env);
+ target_to_host_sigset(&set, &sf->mask);
+ set_sigmask(&set);
+
+ env->pc = tpc;
+ env->npc = tnpc;
+
+ unlock_user_struct(sf, sf_addr, 0);
+ return -TARGET_QEMU_ESIGRETURN;
+
+ segv_and_exit:
+ unlock_user_struct(sf, sf_addr, 0);
+ force_sig(TARGET_SIGSEGV);
+ return -TARGET_QEMU_ESIGRETURN;
}
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
--
2.25.1
