date and time created 92/06/25 05:58:24 by torek

SCCS-vsn: lib/libc/sparc/SYS.h 5.1

diff --git a/usr/src/lib/libc/sparc/SYS.h b/usr/src/lib/libc/sparc/SYS.h
new file mode 100644 (file)
index 0000000..34f8094
--- /dev/null
+++ b/usr/src/lib/libc/sparc/SYS.h
@@ -0,0 +1,53 @@
+/*-
+ * %sccs.include.redist.c%
+ *
+ *     @(#)SYS.h       5.1 (Berkeley) %G%
+ */
+
+#include <sys/syscall.h>
+#include <machine/trap.h>
+
+#ifdef PROF
+#define        ENTRY(x) \
+       .align 4; .globl _##x; .proc 1; _##x:; .data; .align 4; 1: .long 0; \
+       .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
+       or %o0,%lo(1b),%o0; restore
+#else
+#define        ENTRY(x) \
+       .align 4; .globl _##x; .proc 1; _##x:
+#endif
+
+/*
+ * ERROR branches to cerror.  This is done with a macro so that I can
+ * change it to be position independent later, if need be.
+ */
+#define        ERROR() \
+       sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
+
+/*
+ * SYSCALL is used when further action must be taken before returning.
+ * Note that it adds a `nop' over what we could do, if we only knew what
+ * came at label 1....
+ */
+#define        SYSCALL(x) \
+       ENTRY(x); mov SYS_##x,%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
+
+/*
+ * RSYSCALL is used when the system call should just return.  Here
+ * we use the SYSCALL_RFLAG to put the `success' return address in %g7
+ * and avoid a branch.
+ */
+#define        RSYSCALL(x) \
+       ENTRY(x); mov (SYS_##x)|SYSCALL_RFLAG,%g1; add %o7,8,%g7; \
+       t ST_SYSCALL; ERROR()
+
+/*
+ * PSEUDO(x,y) is like  RSYSCALL(y) except that the name is x.
+ */
+#define        PSEUDO(x,y) \
+       ENTRY(x); mov (SYS_##y)|SYSCALL_RFLAG,%g1; add %o7,8,%g7; \
+       t ST_SYSCALL; ERROR()
+
+#define        ASMSTR          .asciz
+
+       .globl  cerror