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pc-bios/s390-ccw: Add a write() function for stdio

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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().

Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-5-git-send-email-thuth@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Thomas Huth 2017-07-12 14:49:46 +02:00 committed by Christian Borntraeger
parent 867e039a06
commit 3639f93f91
1 changed files with 14 additions and 2 deletions
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16
pc-bios/s390-ccw/sclp.c
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@ -12,6 +12,8 @@
#include "s390-ccw.h"
#include "sclp.h"
long write(int fd, const void *str, 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)