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[Qemu-devel] [RFC PATCH v2 4/8] pc-bios/s390-ccw: Add a write() function
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [RFC PATCH v2 4/8] pc-bios/s390-ccw: Add a write() function for stdio |
Date: |
Fri, 7 Jul 2017 12:27:00 +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 | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/pc-bios/s390-ccw/sclp.c b/pc-bios/s390-ccw/sclp.c
index 2ee204a..f6466db 100644
--- a/pc-bios/s390-ccw/sclp.c
+++ b/pc-bios/s390-ccw/sclp.c
@@ -12,6 +12,8 @@
#include "s390-ccw.h"
#include "sclp.h"
+long write(int fd, const void *buf, size_t len);
+
static char _sccb[PAGE_SIZE] __attribute__((__aligned__(4096)));
const unsigned char ebc2asc[256] =
@@ -71,11 +73,14 @@ static int _strlen(const char *str)
return i;
}
-void sclp_print(const char *str)
+long write(int fd, const void *str, size_t len)
{
- 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;
@@ -84,6 +89,13 @@ void sclp_print(const char *str)
memcpy(sccb->data, str, 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
- Re: [Qemu-devel] [RFC PATCH v2 1/8] pc-bios/s390-ccw: Move libc functions to separate header, (continued)
Re: [Qemu-devel] [RFC PATCH v2 1/8] pc-bios/s390-ccw: Move libc functions to separate header, Farhan Ali, 2017/07/07
[Qemu-devel] [RFC PATCH v2 2/8] pc-bios/s390-ccw: Move ebc2asc to sclp.c, Thomas Huth, 2017/07/07
[Qemu-devel] [RFC PATCH v2 3/8] pc-bios/s390-ccw: Move virtio-block related functions into a separate file, Thomas Huth, 2017/07/07
[Qemu-devel] [RFC PATCH v2 4/8] pc-bios/s390-ccw: Add a write() function for stdio,
Thomas Huth <=
[Qemu-devel] [RFC PATCH v2 6/8] pc-bios/s390-ccw: Add core files for the network bootloading program, Thomas Huth, 2017/07/07
[Qemu-devel] [RFC PATCH v2 8/8] pc-bios/s390-ccw: Link libnet into the netboot image and do the TFTP load, Thomas Huth, 2017/07/07
[Qemu-devel] [RFC PATCH v2 5/8] roms/SLOF: Update submodule to latest status, Thomas Huth, 2017/07/07
[Qemu-devel] [RFC PATCH v2 7/8] pc-bios/s390-ccw: Add virtio-net driver code, Thomas Huth, 2017/07/07