From f21ea46befe7401cc35205d3b64e3991504b6289 Mon Sep 17 00:00:00 2001
From: Eyck Jentzsch <eyck@minres.com>
Date: Fri, 14 Mar 2025 11:44:03 +0100
Subject: [PATCH] uses htif in iss setting

---
 libwrap/sys/write.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/libwrap/sys/write.c b/libwrap/sys/write.c
index cc77a75..ee84770 100644
--- a/libwrap/sys/write.c
+++ b/libwrap/sys/write.c
@@ -4,6 +4,7 @@
 #include <stdint.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <stdint.h>
 
 #include "platform.h"
 #include "stub.h"
@@ -12,6 +13,8 @@
 #include "semihosting.h"
 #endif
 
+extern uint32_t tohost;
+
 ssize_t __wrap_write(int fd, const void *ptr, size_t len) {
   const uint8_t *current = (const uint8_t *)ptr;
 #if defined(SEMIHOSTING)
@@ -25,6 +28,14 @@ ssize_t __wrap_write(int fd, const void *ptr, size_t len) {
     return len;
   }
   // return len;
+#elif defined(BOARD_iss)
+  volatile uint64_t payload[4];
+  payload[0]= 64;
+  payload[1]= 0;
+  payload[2]= (uintptr_t)ptr;
+  payload[3]= len;
+  tohost = (uint32_t)payload;
+  return len;
 #endif
   if (isatty(fd)) {
     for (size_t jj = 0; jj < len; jj++) {
@@ -38,7 +49,7 @@ ssize_t __wrap_write(int fd, const void *ptr, size_t len) {
         uart_write(uart, '\r');
       }
 #elif defined(BOARD_iss)
-      *((uint32_t *)0xFFFF0000) = current[jj];
+      // *((uint32_t *)0xFFFF0000) = current[jj];
 #elif defined(BOARD_TGCP)
       // TODO: implement
 #else