riscv: export riscv_sp_ptr

Export SP register for later use by get_rt_sigframe_addr.

* linux/riscv/arch_regs.h: New file.
* Makefile.am (EXTRA_DIST): Add it.
* linux/riscv/arch_regs.c (riscv_sp_ptr): New variable.

3 files changed, 3 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index e827d59b8..c023a84ee 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -570,6 +570,7 @@ EXTRA_DIST =				\
 	linux/powerpc64/userent.h	\
 	linux/ptp_clock.h		\
 	linux/riscv/arch_regs.c		\
+	linux/riscv/arch_regs.h		\
 	linux/riscv/errnoent1.h		\
 	linux/riscv/get_error.c		\
 	linux/riscv/get_scno.c		\
diff --git a/linux/riscv/arch_regs.c b/linux/riscv/arch_regs.c
index 40be17d92..58010df27 100644
--- a/linux/riscv/arch_regs.c
+++ b/linux/riscv/arch_regs.c
@@ -1,3 +1,4 @@
 static struct user_regs_struct riscv_regs;
+unsigned long *const riscv_sp_ptr = &riscv_regs.sp;
 #define ARCH_REGS_FOR_GETREGSET riscv_regs
 #define ARCH_PC_REG riscv_regs.pc
diff --git a/linux/riscv/arch_regs.h b/linux/riscv/arch_regs.h
new file mode 100644
index 000000000..f27028198
--- /dev/null
+++ b/linux/riscv/arch_regs.h
@@ -0,0 +1 @@
+extern unsigned long *const riscv_sp_ptr;