1 files changed, 82 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/sparc/sysdep.h b/REORG.TODO/sysdeps/sparc/sysdep.h
new file mode 100644
index 0000000000..245e5cc57f
--- /dev/null
+++ b/REORG.TODO/sysdeps/sparc/sysdep.h
@@ -0,0 +1,82 @@
+/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define _SYSDEPS_SYSDEP_H 1
+#include <bits/hwcap.h>
+
+#ifdef	__ASSEMBLER__
+
+#define SPARC_PIC_THUNK(reg)						\
+	.ifndef __sparc_get_pc_thunk.reg;				\
+	.section .text.__sparc_get_pc_thunk.reg,"axG",@progbits,__sparc_get_pc_thunk.reg,comdat; \
+	.align	 32;							\
+	.weak	 __sparc_get_pc_thunk.reg;				\
+	.hidden	 __sparc_get_pc_thunk.reg;				\
+	.type	 __sparc_get_pc_thunk.reg, #function;			\
+__sparc_get_pc_thunk.reg:		   				\
+	jmp	%o7 + 8;						\
+	 add	%o7, %reg, %##reg;					\
+	.previous;							\
+	.endif;
+
+/* The "-4" and "+4" offsets against _GLOBAL_OFFSET_TABLE_ are
+   critical since they represent the offset from the thunk call to the
+   instruction containing the _GLOBAL_OFFSET_TABLE_ reference.
+   Therefore these instructions cannot be moved around without
+   appropriate adjustments to those offsets.
+
+   Furthermore, these expressions are special in another regard.  When
+   the assembler sees a reference to _GLOBAL_OFFSET_TABLE_ inside of
+   a %hi() or %lo(), it emits a PC-relative relocation.  This causes
+   R_SPARC_HI22 to turn into R_SPARC_PC22, and R_SPARC_LO10 to turn into
+   R_SPARC_PC10, respectively.
+
+   Even when v9 we use a call sequence instead of using "rd %pc" because
+   RDPC is extremely expensive and incurs a full pipeline flush.  */
+
+#define SPARC_PIC_THUNK_CALL(reg)					\
+	sethi	%hi(_GLOBAL_OFFSET_TABLE_-4), %##reg;			\
+	call	__sparc_get_pc_thunk.reg;				\
+	 or	%##reg, %lo(_GLOBAL_OFFSET_TABLE_+4), %##reg;
+
+#define SETUP_PIC_REG(reg)						\
+	SPARC_PIC_THUNK(reg)						\
+	SPARC_PIC_THUNK_CALL(reg)
+
+#define SETUP_PIC_REG_LEAF(reg, tmp)					\
+	SPARC_PIC_THUNK(reg)						\
+	mov	%o7, %##tmp;		      				\
+	SPARC_PIC_THUNK_CALL(reg);					\
+	mov	%##tmp, %o7;
+
+#undef ENTRY
+#define ENTRY(name)			\
+	.align	4;			\
+	.global	C_SYMBOL_NAME(name);	\
+	.type	name, @function;	\
+C_LABEL(name)				\
+	cfi_startproc;
+
+#undef END
+#define END(name)			\
+	cfi_endproc;			\
+	.size name, . - name
+
+#undef LOC
+#define LOC(name)  .L##name
+
+#endif	/* __ASSEMBLER__ */