semihosting: Create qemu_semihosting_console_write

Will replace qemu_semihosting_console_{outs,outc},
but we need more plumbing first.

Reviewed-by: Luc Michel <lmichel@kalray.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 26 insertions, 0 deletions

diff --git a/include/semihosting/console.h b/include/semihosting/console.h
index 39dbf1b062..6994f23c82 100644
--- a/include/semihosting/console.h
+++ b/include/semihosting/console.h
@@ -55,6 +55,18 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong c);
 int qemu_semihosting_console_read(CPUState *cs, void *buf, int len);
 
 /**
+ * qemu_semihosting_console_write:
+ * @buf: host buffer
+ * @len: buffer size
+ *
+ * Write len bytes from buf to the debug console.
+ *
+ * Returns: number of bytes written -- this should only ever be short
+ * on some sort of i/o error.
+ */
+int qemu_semihosting_console_write(void *buf, int len);
+
+/**
  * qemu_semihosting_log_out:
  * @s: pointer to string
  * @len: length of string
diff --git a/linux-user/semihost.c b/linux-user/semihost.c
index 2029fb674c..871edf993a 100644
--- a/linux-user/semihost.c
+++ b/linux-user/semihost.c
@@ -76,3 +76,8 @@ int qemu_semihosting_console_read(CPUState *cs, void *buf, int len)
 
     return ret;
 }
+
+int qemu_semihosting_console_write(void *buf, int len)
+{
+    return fwrite(buf, 1, len, stderr);
+}
diff --git a/semihosting/console.c b/semihosting/console.c
index 1d16a290c4..540aa0cd4b 100644
--- a/semihosting/console.c
+++ b/semihosting/console.c
@@ -169,6 +169,15 @@ int qemu_semihosting_console_read(CPUState *cs, void *buf, int len)
     return ret;
 }
 
+int qemu_semihosting_console_write(void *buf, int len)
+{
+    if (console.chr) {
+        return qemu_chr_write_all(console.chr, (uint8_t *)buf, len);
+    } else {
+        return fwrite(buf, 1, len, stderr);
+    }
+}
+
 void qemu_semihosting_console_init(Chardev *chr)
 {
     console.chr = chr;