1 files changed, 86 insertions, 0 deletions
diff --git a/arch/sparc/kernel/sclow.S b/arch/sparc/kernel/sclow.S
new file mode 100644
index 000000000000..3a867fc19927
--- /dev/null
+++ b/arch/sparc/kernel/sclow.S
@@ -0,0 +1,86 @@
+/* sclow.S: Low level special syscall handling.
+ *          Basically these are cases where we can completely
+ *          handle the system call without saving any state
+ *          because we know that the process will not sleep.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/ptrace.h>
+#include <asm/asm_offsets.h>
+#include <asm/errno.h>
+#include <asm/winmacro.h>
+#include <asm/thread_info.h>
+#include <asm/psr.h>
+#include <asm/page.h>
+
+#define CC_AND_RETT  \
+	set	PSR_C, %l4; \
+	andn	%l0, %l4, %l4; \
+	wr	%l4, 0x0, %psr; \
+	nop; nop; nop; \
+	jmp	%l2; \
+	rett	%l2 + 4;
+
+#define SC_AND_RETT  \
+	set	PSR_C, %l4; \
+	or	%l0, %l4, %l4; \
+	wr	%l4, 0x0, %psr; \
+	nop; nop; nop; \
+	jmp	%l2; \
+	rett	%l2 + 4;
+
+#define LABEL(func)  func##_low
+
+	.globl	LABEL(sunosnop)
+LABEL(sunosnop):
+	CC_AND_RETT
+
+#if (ASIZ_task_uid == 2 && ASIZ_task_euid == 2)
+	.globl	LABEL(sunosgetuid)
+LABEL(sunosgetuid):
+	LOAD_CURRENT(l4, l5)
+	ld	[%l4 + TI_TASK], %l4
+	lduh	[%l4 + AOFF_task_uid], %i0
+	lduh	[%l4 + AOFF_task_euid], %i1
+	CC_AND_RETT
+#endif
+
+#if (ASIZ_task_gid == 2 && ASIZ_task_egid == 2)
+	.globl	LABEL(sunosgetgid)
+LABEL(sunosgetgid):
+	LOAD_CURRENT(l4, l5)
+	ld	[%l4 + TI_TASK], %l4
+	lduh	[%l4 + AOFF_task_gid], %i0
+	lduh	[%l4 + AOFF_task_egid], %i1
+	CC_AND_RETT
+#endif
+
+	.globl	LABEL(sunosmctl)
+LABEL(sunosmctl):
+	mov	0, %i0
+	CC_AND_RETT
+
+	.globl	LABEL(sunosgdtsize)
+LABEL(sunosgdtsize):	
+	mov	256, %i0
+	CC_AND_RETT
+
+	.globl	LABEL(getpagesize)
+LABEL(getpagesize):
+	set	PAGE_SIZE, %i0
+	CC_AND_RETT
+
+	/* XXX sys_nice() XXX */
+	/* XXX sys_setpriority() XXX */
+	/* XXX sys_getpriority() XXX */
+	/* XXX sys_setregid() XXX */
+	/* XXX sys_setgid() XXX */
+	/* XXX sys_setreuid() XXX */
+	/* XXX sys_setuid() XXX */
+	/* XXX sys_setfsuid() XXX */
+	/* XXX sys_setfsgid() XXX */
+	/* XXX sys_setpgid() XXX */
+	/* XXX sys_getpgid() XXX */
+	/* XXX sys_setsid() XXX */
+	/* XXX sys_getsid() XXX */