diff options
| author | Thomas Huth <thuth@redhat.com> | 2017-07-12 14:49:46 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-07-14 12:29:48 +0200 |
| commit | 3639f93f91fcba2c4d686653dcffb8224555b0a8 (patch) | |
| tree | 2553725cbebde6a9be38c9d7a7479df8a6d70adc /pc-bios | |
| parent | 867e039a06a02d3f2f8fa9e0246bda7917150fd9 (diff) | |
| download | qemu-3639f93f91fcba2c4d686653dcffb8224555b0a8.zip | |
pc-bios/s390-ccw: Add a write() function for stdio
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>
Diffstat (limited to 'pc-bios')
| -rw-r--r-- | pc-bios/s390-ccw/sclp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/pc-bios/s390-ccw/sclp.c b/pc-bios/s390-ccw/sclp.c index 2ee204a971..b1fc8ff44b 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 *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) |