20000317 sourceware import

libgloss/sparc/libsys/cerror.S

@@ -0,0 +1,47 @@
+! Set errno.
+! This function is called by all the syscall stubs.
+!
+! FIXME: We assume errno is the first member of struct _reent.
+! Not sure what to do about this.
+
+#include "syscallasm.h"
+
+	DATA_SECTION
+	ALIGN (4)
+	GLOBAL (ASM_SYMBOL (errno))	! FIXME: ASM_PRIVATE_SYMBOL ?
+ASM_SYMBOL (errno):
+	WORD (0)
+
+	TEXT_SECTION
+	ALIGN (4)
+
+	GLOBAL (ASM_PRIVATE_SYMBOL (cerror))
+ASM_PRIVATE_SYMBOL (cerror):
+	sethi	%hi (ASM_SYMBOL (errno)),%g1
+	st	%o0,[%g1+%lo (ASM_SYMBOL (errno))]
+	jmpl	%o7+8,%g0
+	mov	-1,%o0
+
+	GLOBAL (ASM_PRIVATE_SYMBOL (cerror_r))
+ASM_PRIVATE_SYMBOL (cerror_r):
+	st	%o0,[%o1]
+	jmpl	%o7+8,%g0
+	mov	-1,%o0
+
+! Since all system calls need this file, we put various state globals
+! here as well.
+
+	DATA_SECTION
+
+! CURBRK contains the current top of allocated space.
+! END is a private symbol in svr4, but a public one in sunos4.
+! FIXME: CURBRK is 4 bytes for now.
+
+	ALIGN (4)
+	GLOBAL (ASM_PRIVATE_SYMBOL (curbrk))
+ASM_PRIVATE_SYMBOL (curbrk):
+#ifdef SVR4
+	WORD (ASM_PRIVATE_SYMBOL (end))
+#else
+	WORD (ASM_SYMBOL (end))
+#endif