[RFC,XEN,07/23] riscv: Add asm-offsets.c

Commit Message

Bobby Eshleman Jan. 22, 2020, 1:58 a.m. UTC

From: Alistair Francis <[e-mail]>

Signed-off-by: Alistair Francis <[e-mail]>
---
 xen/arch/riscv/asm-offsets.c | 38 ++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 xen/arch/riscv/asm-offsets.c

Patch

diff --git a/xen/arch/riscv/asm-offsets.c b/xen/arch/riscv/asm-offsets.c
new file mode 100644
index 0000000000..4c53f8af84
--- /dev/null
+++ b/xen/arch/riscv/asm-offsets.c
@@ -0,0 +1,38 @@ 
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ * Copyright (C) 2017 SiFive
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ */
+
+#define COMPILE_OFFSETS
+
+#include <xen/types.h>
+#include <xen/sched.h>
+#include <xen/bitops.h>
+#include <public/xen.h>
+#include <asm/processor.h>
+#include <asm/init.h>
+#include <asm/current.h>
+
+#define DEFINE(_sym, _val)                                                 \
+    asm volatile ("\n.ascii\"==>#define " #_sym " %0 /* " #_val " */<==\"" \
+                  : : "i" (_val) )
+#define BLANK()                                                            \
+    asm volatile ( "\n.ascii\"==><==\"" : : )
+#define OFFSET(_sym, _str, _mem)                                           \
+    DEFINE(_sym, offsetof(_str, _mem));
+
+void asm_offsets(void)
+{
+
+   BLANK();
+   OFFSET(INITINFO_stack, struct init_info, stack);
+}