Initial drop

Add some riscv code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 14 insertions, 0 deletions

diff --git a/riscv/riscv-probe/libfemto/std/vprintf.c b/riscv/riscv-probe/libfemto/std/vprintf.c
new file mode 100644
index 0000000..36c99a3
--- /dev/null
+++ b/riscv/riscv-probe/libfemto/std/vprintf.c
@@ -0,0 +1,14 @@
+// See LICENSE for license details.
+
+#include <stdio.h>
+#include <alloca.h>
+
+int vprintf(const char* s, va_list vl)
+{
+    char *out;
+    int res = vsnprintf(NULL, -1, s, vl);
+    out = alloca(res + 1);
+    vsnprintf(out, res + 1, s, vl);
+    while (*out) putchar(*out++);
+    return res;
+}