riscv: support standalone applications on RV64I systems
Add an implementation of EXPORT_FUNC() for RV64I systems to support them
in standalone applications.
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c
index f37d209..0827bde 100644
--- a/examples/standalone/stubs.c
+++ b/examples/standalone/stubs.c
@@ -176,14 +176,25 @@
/*
* gp holds the pointer to the global_data. t0 is call clobbered.
*/
+#ifdef CONFIG_ARCH_RV64I
#define EXPORT_FUNC(f, a, x, ...) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
+" ld t0, %0(gp)\n" \
+" ld t0, %1(t0)\n" \
+" jr t0\n" \
+ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "t0");
+#else
+#define EXPORT_FUNC(f, a, x, ...) \
+ asm volatile ( \
+" .globl " #x "\n" \
+#x ":\n" \
" lw t0, %0(gp)\n" \
" lw t0, %1(t0)\n" \
" jr t0\n" \
: : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "t0");
+#endif
#elif defined(CONFIG_ARC)
/*
* r25 holds the pointer to the global_data. r10 is call clobbered.