};
};
+#define PTRACE_GET_RSEQ_CONFIGURATION 0x420f
+
+struct ptrace_rseq_configuration {
+ __u64 rseq_abi_pointer;
+ __u32 rseq_abi_size;
+ __u32 signature;
+ __u32 flags;
+ __u32 pad;
+};
+
/*
* These values are stored in task->ptrace_message
* by tracehook_report_syscall_* to describe the current syscall-stop.
#include <linux/cn_proc.h>
#include <linux/compat.h>
#include <linux/sched/signal.h>
+#include <linux/minmax.h>
#include <asm/syscall.h> /* for syscall_get_* */
return ret;
}
+#ifdef CONFIG_RSEQ
+static long ptrace_get_rseq_configuration(struct task_struct *task,
+ unsigned long size, void __user *data)
+{
+ struct ptrace_rseq_configuration conf = {
+ .rseq_abi_pointer = (u64)(uintptr_t)task->rseq,
+ .rseq_abi_size = sizeof(*task->rseq),
+ .signature = task->rseq_sig,
+ .flags = 0,
+ };
+
+ size = min_t(unsigned long, size, sizeof(conf));
+ if (copy_to_user(data, &conf, size))
+ return -EFAULT;
+ return sizeof(conf);
+}
+#endif
+
#ifdef PTRACE_SINGLESTEP
#define is_singlestep(request) ((request) == PTRACE_SINGLESTEP)
#else
ret = seccomp_get_metadata(child, addr, datavp);
break;
+#ifdef CONFIG_RSEQ
+ case PTRACE_GET_RSEQ_CONFIGURATION:
+ ret = ptrace_get_rseq_configuration(child, addr, datavp);
+ break;
+#endif
+
default:
break;
}