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[Qemu-devel] [RFC PATCH 03/14] pc-bios/s390-ccw: Add a write() function
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [RFC PATCH 03/14] pc-bios/s390-ccw: Add a write() function for stdio |
Date: |
Tue, 27 Jun 2017 13:48:09 +0200 |
The stdio functions from the SLOF libc need a write() function for
printing text to stdout/stderr. Let's implement this function by
refactoring the code from sclp_print().
Signed-off-by: Thomas Huth <address@hidden>
---
pc-bios/s390-ccw/sclp.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)
diff --git a/pc-bios/s390-ccw/sclp.c b/pc-bios/s390-ccw/sclp.c
index a1639ba..a23bdd3 100644
--- a/pc-bios/s390-ccw/sclp.c
+++ b/pc-bios/s390-ccw/sclp.c
@@ -8,6 +8,7 @@
* directory.
*/
+#include <unistd.h>
#include "s390-ccw.h"
#include "sclp.h"
@@ -51,34 +52,29 @@ void sclp_setup(void)
sclp_set_write_mask();
}
-static int _strlen(const char *str)
+ssize_t write(int fd, const void *buf, size_t len)
{
- int i;
- for (i = 0; *str; i++)
- str++;
- return i;
-}
-
-static void _memcpy(char *dest, const char *src, int len)
-{
- int i;
- for (i = 0; i < len; i++)
- dest[i] = src[i];
-}
-
-void sclp_print(const char *str)
-{
- int len = _strlen(str);
WriteEventData *sccb = (void *)_sccb;
+ if (fd != 1 && fd != 2) {
+ return -EIO;
+ }
+
sccb->h.length = sizeof(WriteEventData) + len;
sccb->h.function_code = SCLP_FC_NORMAL_WRITE;
sccb->ebh.length = sizeof(EventBufferHeader) + len;
sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA;
sccb->ebh.flags = 0;
- _memcpy(sccb->data, str, len);
+ memcpy(sccb->data, buf, len);
sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb);
+
+ return len;
+}
+
+void sclp_print(const char *str)
+{
+ write(1, str, strlen(str));
}
void sclp_get_loadparm_ascii(char *loadparm)
--
1.8.3.1
- [Qemu-devel] [RFC PATCH 00/14] Implement network booting directly into the s390-ccw BIOS, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 03/14] pc-bios/s390-ccw: Add a write() function for stdio,
Thomas Huth <=
- [Qemu-devel] [RFC PATCH 02/14] pc-bios/s390-ccw: Start using the libc from SLOF, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 04/14] pc-bios/s390-ccw: Add implementation of sbrk(), Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 06/14] libnet: Remove remainders of netsave code, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 01/14] pc-bios/s390-ccw: Add the libc from the SLOF firmware, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 07/14] libnet: Rework error message printing, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 08/14] libnet: Refactor some code of netload() into a separate function, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 10/14] pc-bios/s390-ccw: Add timer code for the libnet, Thomas Huth, 2017/06/27
- [Qemu-devel] [RFC PATCH 11/14] pc-bios/s390-ccw: Add virtio-net driver code, Thomas Huth, 2017/06/27