static inline long
syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
+ if ((long)regs->cr_ifs < 0) /* Not a syscall */
+ return -1;
+
+#ifdef CONFIG_IA32_SUPPORT
+ if (IS_IA32_PROCESS(regs))
+ return regs->r1;
+#endif
+
return regs->r15;
}
#endif
#endif
#if defined(__ia64__)
-#define syscall_get_arguments(task, regs, i, n, args) \
- __ia64_syscall_get_arguments(task, regs, i, n, args, &c->unwaddr)
-static inline void
-__ia64_syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
- unsigned int i, unsigned int n,
- unsigned long *args, unsigned long **cache)
+/* Return TRUE if PT was created due to kernel-entry via a system-call. */
+
+static inline int
+in_syscall (struct pt_regs *pt)
{
- if (i + n > 6) {
- _stp_error("invalid syscall arg request");
+ return (long) pt->cr_ifs >= 0;
+}
+
+struct syscall_get_set_args {
+ unsigned int i;
+ unsigned int n;
+ unsigned long *args;
+ struct pt_regs *regs;
+ int rw;
+};
+
+static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data)
+{
+ struct syscall_get_set_args *args = data;
+ struct pt_regs *pt = args->regs;
+ unsigned long *krbs, cfm, ndirty;
+ int i, count;
+
+ if (unw_unwind_to_user(info) < 0)
return;
+
+ cfm = pt->cr_ifs;
+ krbs = (unsigned long *)info->task + IA64_RBS_OFFSET/8;
+ ndirty = ia64_rse_num_regs(krbs, krbs + (pt->loadrs >> 19));
+
+ count = 0;
+ if (in_syscall(pt))
+ count = min_t(int, args->n, cfm & 0x7f);
+
+ for (i = 0; i < count; i++) {
+ if (args->rw)
+ *ia64_rse_skip_regs(krbs, ndirty + i + args->i) =
+ args->args[i];
+ else
+ args->args[i] = *ia64_rse_skip_regs(krbs,
+ ndirty + i + args->i);
}
- switch (i) {
- case 0:
- if (!n--) break;
- *args++ = ia64_fetch_register(32, regs, cache);
- case 1:
- if (!n--) break;
- *args++ = ia64_fetch_register(33, regs, cache);
- case 2:
- if (!n--) break;
- *args++ = ia64_fetch_register(34, regs, cache);
- case 3:
- if (!n--) break;
- *args++ = ia64_fetch_register(35, regs, cache);
- case 4:
- if (!n--) break;
- *args++ = ia64_fetch_register(36, regs, cache);
- case 5:
- if (!n--) break;
- *args++ = ia64_fetch_register(37, regs, cache);
+
+ if (!args->rw) {
+ while (i < args->n) {
+ args->args[i] = 0;
+ i++;
+ }
+ }
+}
+
+void ia64_syscall_get_set_arguments(struct task_struct *task,
+ struct pt_regs *regs, unsigned int i, unsigned int n,
+ unsigned long *args, int rw)
+{
+ struct syscall_get_set_args data = {
+ .i = i,
+ .n = n,
+ .args = args,
+ .regs = regs,
+ .rw = rw,
+ };
+
+ if (task == current)
+ unw_init_running(syscall_get_set_args_cb, &data);
+ else {
+ struct unw_frame_info ufi;
+ memset(&ufi, 0, sizeof(ufi));
+ unw_init_from_blocked_task(&ufi, task);
+ syscall_get_set_args_cb(&ufi, &data);
+ }
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+
+#ifdef CONFIG_IA32_SUPPORT
+ if (IS_IA32_PROCESS(regs)) {
+ switch (i + n) {
+ case 6:
+ if (!n--) break;
+ *args++ = regs->r13;
+ case 5:
+ if (!n--) break;
+ *args++ = regs->r15;
+ case 4:
+ if (!n--) break;
+ *args++ = regs->r14;
+ case 3:
+ if (!n--) break;
+ *args++ = regs->r10;
+ case 2:
+ if (!n--) break;
+ *args++ = regs->r9;
+ case 1:
+ if (!n--) break;
+ *args++ = regs->r11;
+ case 0:
+ if (!n--) break;
+ default:
+ BUG();
+ break;
+ }
+
+ return;
}
+#endif
+ ia64_syscall_get_set_arguments(task, regs, i, n, args, 0);
}
#endif