1 files changed, 74 insertions, 0 deletions
diff --git a/usr/klibc/arch/s390/mmap.c b/usr/klibc/arch/s390/mmap.c
new file mode 100644
index 0000000..dfc5a84
--- /dev/null
+++ b/usr/klibc/arch/s390/mmap.c
@@ -0,0 +1,74 @@
+#include <errno.h>
+#include <sys/types.h>
+#include <linux/unistd.h>
+
+struct mmap_arg_struct {
+	unsigned long addr;
+	unsigned long len;
+	unsigned long prot;
+	unsigned long flags;
+	unsigned long fd;
+	unsigned long offset;
+};
+
+#ifndef __s390x__
+
+void *__mmap2(void *addr, size_t len, int prot, int flags, int fd, long offset)
+{
+	struct mmap_arg_struct args = {
+		.addr	= (unsigned long)addr,
+		.len	= (unsigned long)len,
+		.prot	= (unsigned long)prot,
+		.flags	= (unsigned long)flags,
+		.fd	= (unsigned long)fd,
+		.offset = (unsigned long)offset,
+	};
+
+	register struct mmap_arg_struct *__arg1 asm("2") = &args;
+	register long __svcres asm("2");
+	unsigned long __res;
+
+	__asm__ __volatile__("    svc %b1\n"
+			     : "=d"(__svcres)
+			     : "i"(__NR_mmap2), "0"(__arg1)
+			     : "1", "cc", "memory");
+	__res = __svcres;
+	if (__res >= (unsigned long)-4095) {
+		errno = -__res;
+		__res = -1;
+	}
+	return (void *)__res;
+}
+
+#else /* __s390x__ */
+
+void *mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
+{
+	struct mmap_arg_struct args = {
+		.addr	= (unsigned long)addr,
+		.len	= (unsigned long)len,
+		.prot	= (unsigned long)prot,
+		.flags	= (unsigned long)flags,
+		.fd	= (unsigned long)fd,
+		.offset = (unsigned long)offset,
+	};
+
+	register struct mmap_arg_struct *__arg1 asm("2") = &args;
+	register long __svcres asm("2");
+	unsigned long __res;
+
+	__asm__ __volatile__ (
+		"    svc %1\n"
+		: "=d" (__svcres)
+		: "i" (__NR_mmap),
+		  "0" (__arg1)
+		: "1", "cc", "memory");
+	__res = __svcres;
+	if (__res >= (unsigned long)-4095) {
+		errno = -__res;
+		__res = -1;
+	}
+	return (void *)__res;
+}
+
+#endif /* __s390x__ */