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-rw-r--r--linux-user/signal.c205
1 files changed, 202 insertions, 3 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 075638097d..2df17aa21b 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -4051,6 +4051,43 @@ struct target_sigframe
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 uc_flags;
+ abi_ulong uc_link;
+ target_stack_t uc_stack;
+ struct target_mcontext uc_mcontext;
+ abi_long uc_filler[80];
+ target_sigset_t uc_sigmask;
+};
+
+struct target_rt_sigframe
+{
+ abi_ulong pretcode;
+ int sig;
+ abi_ulong pinfo;
+ abi_ulong puc;
+ char retcode[8];
+ struct target_siginfo info;
+ struct target_ucontext uc;
+};
static int
setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
@@ -4160,11 +4197,146 @@ give_sigsegv:
force_sig(SIGSEGV);
}
+static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
+ CPUState *env)
+{
+ target_greg_t *gregs = uc->uc_mcontext.gregs;
+ int err;
+
+ err = __put_user(TARGET_MCONTEXT_VERSION, &uc->uc_mcontext.version);
+ err |= __put_user(env->dregs[0], &gregs[0]);
+ err |= __put_user(env->dregs[1], &gregs[1]);
+ err |= __put_user(env->dregs[2], &gregs[2]);
+ err |= __put_user(env->dregs[3], &gregs[3]);
+ err |= __put_user(env->dregs[4], &gregs[4]);
+ err |= __put_user(env->dregs[5], &gregs[5]);
+ err |= __put_user(env->dregs[6], &gregs[6]);
+ err |= __put_user(env->dregs[7], &gregs[7]);
+ err |= __put_user(env->aregs[0], &gregs[8]);
+ err |= __put_user(env->aregs[1], &gregs[9]);
+ err |= __put_user(env->aregs[2], &gregs[10]);
+ err |= __put_user(env->aregs[3], &gregs[11]);
+ err |= __put_user(env->aregs[4], &gregs[12]);
+ err |= __put_user(env->aregs[5], &gregs[13]);
+ err |= __put_user(env->aregs[6], &gregs[14]);
+ err |= __put_user(env->aregs[7], &gregs[15]);
+ err |= __put_user(env->pc, &gregs[16]);
+ err |= __put_user(env->sr, &gregs[17]);
+
+ return err;
+}
+
+static inline int target_rt_restore_ucontext(CPUState *env,
+ struct target_ucontext *uc,
+ int *pd0)
+{
+ int temp;
+ int err;
+ target_greg_t *gregs = uc->uc_mcontext.gregs;
+
+ err = __get_user(temp, &uc->uc_mcontext.version);
+ if (temp != TARGET_MCONTEXT_VERSION)
+ goto badframe;
+
+ /* restore passed registers */
+ err |= __get_user(env->dregs[0], &gregs[0]);
+ err |= __get_user(env->dregs[1], &gregs[1]);
+ err |= __get_user(env->dregs[2], &gregs[2]);
+ err |= __get_user(env->dregs[3], &gregs[3]);
+ err |= __get_user(env->dregs[4], &gregs[4]);
+ err |= __get_user(env->dregs[5], &gregs[5]);
+ err |= __get_user(env->dregs[6], &gregs[6]);
+ err |= __get_user(env->dregs[7], &gregs[7]);
+ err |= __get_user(env->aregs[0], &gregs[8]);
+ err |= __get_user(env->aregs[1], &gregs[9]);
+ err |= __get_user(env->aregs[2], &gregs[10]);
+ err |= __get_user(env->aregs[3], &gregs[11]);
+ err |= __get_user(env->aregs[4], &gregs[12]);
+ err |= __get_user(env->aregs[5], &gregs[13]);
+ err |= __get_user(env->aregs[6], &gregs[14]);
+ err |= __get_user(env->aregs[7], &gregs[15]);
+ err |= __get_user(env->pc, &gregs[16]);
+ err |= __get_user(temp, &gregs[17]);
+ env->sr = (env->sr & 0xff00) | (temp & 0xff);
+
+ *pd0 = env->dregs[0];
+ return err;
+
+badframe:
+ return 1;
+}
+
static void setup_rt_frame(int sig, struct target_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
- fprintf(stderr, "setup_rt_frame: not implemented\n");
+ struct target_rt_sigframe *frame;
+ abi_ulong frame_addr;
+ abi_ulong retcode_addr;
+ abi_ulong info_addr;
+ abi_ulong uc_addr;
+ int err = 0;
+ int i;
+
+ frame_addr = get_sigframe(ka, env, sizeof *frame);
+ if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
+ goto give_sigsegv;
+
+ err |= __put_user(sig, &frame->sig);
+
+ info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
+ err |= __put_user(info_addr, &frame->pinfo);
+
+ uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
+ err |= __put_user(uc_addr, &frame->puc);
+
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Create the ucontext */
+
+ err |= __put_user(0, &frame->uc.uc_flags);
+ err |= __put_user(0, &frame->uc.uc_link);
+ err |= __put_user(target_sigaltstack_used.ss_sp,
+ &frame->uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(env->aregs[7]),
+ &frame->uc.uc_stack.ss_flags);
+ err |= __put_user(target_sigaltstack_used.ss_size,
+ &frame->uc.uc_stack.ss_size);
+ err |= target_rt_setup_ucontext(&frame->uc, env);
+
+ if (err)
+ goto give_sigsegv;
+
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]))
+ goto give_sigsegv;
+ }
+
+ /* Set up to return from userspace. */
+
+ retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
+ err |= __put_user(retcode_addr, &frame->pretcode);
+
+ /* moveq #,d0; notb d0; trap #0 */
+
+ err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
+ (long *)(frame->retcode + 0));
+ err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
+
+ if (err)
+ goto give_sigsegv;
+
+ /* Set up to return from userspace */
+
+ 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_sig(SIGSEGV);
}
long do_sigreturn(CPUState *env)
@@ -4207,8 +4379,35 @@ badframe:
long do_rt_sigreturn(CPUState *env)
{
- fprintf(stderr, "do_rt_sigreturn: not implemented\n");
- return -TARGET_ENOSYS;
+ struct target_rt_sigframe *frame;
+ abi_ulong frame_addr = env->aregs[7] - 4;
+ target_sigset_t target_set;
+ sigset_t set;
+ int d0;
+
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
+
+ target_to_host_sigset_internal(&set, &target_set);
+ sigprocmask(SIG_SETMASK, &set, NULL);
+
+ /* restore registers */
+
+ if (target_rt_restore_ucontext(env, &frame->uc, &d0))
+ goto badframe;
+
+ 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 d0;
+
+badframe:
+ unlock_user_struct(frame, frame_addr, 0);
+ force_sig(TARGET_SIGSEGV);
+ return 0;
}
#else
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-27 14:16:51 +0000