2 files changed, 20 insertions, 1 deletions

diff --git a/include/linux/elf.h b/include/linux/elf.h
index a8c4af073ce9..d8e6e61ad9ff 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -349,7 +349,11 @@ typedef struct elf64_shdr {
 #define ELF_OSABI ELFOSABI_NONE
 #endif
 
-/* Notes used in ET_CORE */
+/*
+ * Notes used in ET_CORE. Architectures export some of the arch register sets
+ * using the corresponding note types via the PTRACE_GETREGSET and
+ * PTRACE_SETREGSET requests.
+ */
 #define NT_PRSTATUS     1
 #define NT_PRFPREG      2
 #define NT_PRPSINFO     3
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 56f2d63a5cbb..dbfa821d5a6e 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -27,6 +27,21 @@
 #define PTRACE_GETSIGINFO       0x4202
 #define PTRACE_SETSIGINFO       0x4203
 
+/*
+ * Generic ptrace interface that exports the architecture specific regsets
+ * using the corresponding NT_* types (which are also used in the core dump).
+ *
+ * This interface usage is as follows:
+ *      struct iovec iov = { buf, len};
+ *
+ *      ret = ptrace(PTRACE_GETREGSET/PTRACE_SETREGSET, pid, NT_XXX_TYPE, &iov);
+ *
+ * On the successful completion, iov.len will be updated by the kernel,
+ * specifying how much the kernel has written/read to/from the user's iov.buf.
+ */
+#define PTRACE_GETREGSET        0x4204
+#define PTRACE_SETREGSET        0x4205
+
 /* options set using PTRACE_SETOPTIONS */
 #define PTRACE_O_TRACESYSGOOD   0x00000001
 #define PTRACE_O_TRACEFORK      0x00000002