PRU GAS Port

	* NEWS: Mention new PRU target.
	* Makefile.am: Add PRU target.
	* config/obj-elf.c: Ditto.
	* configure.tgt: Ditto.
	* config/tc-pru.c: New file.
	* config/tc-pru.h: New file.
	* doc/Makefile.am: Add documentation for PRU GAS port.
	* doc/all.texi, Ditto.
	* doc/as.texinfo: Ditto.
	* doc/c-pru.texi: Document PRU GAS options.
	* Makefile.in: Regenerate.
	* doc/Makefile.in: Regenerate.
	* po/POTFILES.in: Regenerate.
	* testsuite/gas/pru/alu.d: New file for PRU GAS testsuite.
	* testsuite/gas/pru/alu.s: Ditto.
	* testsuite/gas/pru/branch.d: Ditto.
	* testsuite/gas/pru/branch.s: Ditto.
	* testsuite/gas/pru/illegal.l: Ditto.
	* testsuite/gas/pru/illegal.s: Ditto.
	* testsuite/gas/pru/ldi.d: Ditto.
	* testsuite/gas/pru/ldi.s: Ditto.
	* testsuite/gas/pru/ldst.d: Ditto.
	* testsuite/gas/pru/ldst.s: Ditto.
	* testsuite/gas/pru/loop.d: Ditto.
	* testsuite/gas/pru/loop.s: Ditto.
	* testsuite/gas/pru/misc.d: Ditto.
	* testsuite/gas/pru/misc.s: Ditto.
	* testsuite/gas/pru/pru.exp: Ditto.
	* testsuite/gas/pru/pseudo.d: Ditto.
	* testsuite/gas/pru/pseudo.s: Ditto.
	* testsuite/gas/pru/warn_reglabel.l: Ditto.
	* testsuite/gas/pru/warn_reglabel.s: Ditto.
	* testsuite/gas/pru/xfr.d: Ditto.
	* testsuite/gas/pru/xfr.s: Ditto.
	* testsuite/gas/lns/lns.exp: Mark lns-common-1-alt variant for PRU.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

1 files changed, 154 insertions, 0 deletions

diff --git a/gas/config/tc-pru.h b/gas/config/tc-pru.h
new file mode 100644
index 0000000..d3d0d78
--- /dev/null
+++ b/gas/config/tc-pru.h
@@ -0,0 +1,154 @@
+/* Definitions for TI PRU assembler.
+   Copyright (C) 2014-2016 Free Software Foundation, Inc.
+   Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GAS 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#ifndef __TC_PRU__
+#define __TC_PRU__
+
+#define TARGET_BYTES_BIG_ENDIAN 0
+
+/* Words are big enough to hold addresses.  */
+#define WORKING_DOT_WORD	1
+
+extern const char *pru_target_format (void);
+#define TARGET_FORMAT  pru_target_format ()
+#define TARGET_ARCH    bfd_arch_pru
+
+/* A PRU instruction consists of tokens and separator characters
+   the tokens are things like the instruction name (add, or jmp etc),
+   the register indices ($5, $7 etc), and constant expressions.  The
+   separator characters are commas, brackets and space.
+   The instruction name is always separated from other tokens by a space
+   The maximum number of tokens in an instruction is 6 (the instruction name,
+   4 arguments, and a 4th string representing the expected instruction opcode
+   after assembly.  The latter is only used when the assemble is running in
+   self test mode, otherwise its presence will generate an error.  */
+#define PRU_MAX_INSN_TOKENS	7
+
+/* There are no machine-specific operands so we #define this to nothing.  */
+#define md_operand(x)
+
+/* Function prototypes exported to rest of GAS.  */
+extern void md_assemble (char *op_str);
+extern void md_end (void);
+extern void md_begin (void);
+
+#define tc_fix_adjustable(fixp) pru_fix_adjustable (fixp)
+extern int pru_fix_adjustable (struct fix *);
+
+#define tc_frob_label(lab) pru_frob_label (lab)
+extern void pru_frob_label (symbolS *);
+
+extern void md_convert_frag (bfd * headers, segT sec, fragS * fragP);
+
+#define DIFF_EXPR_OK
+
+/* FIXME This seems appropriate, given that we intentionally prevent
+   PRU's .text from being used in a DIFF expression with symbols from
+   other sections.  Revisit once GDB is ported.  */
+#define CFI_DIFF_EXPR_OK 0
+
+#define TC_PARSE_CONS_RETURN_TYPE int
+#define TC_PARSE_CONS_RETURN_NONE 0
+
+#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
+	pru_parse_cons_expression (EXP, NBYTES)
+extern int pru_parse_cons_expression (expressionS *exp, int size);
+
+#define TC_CONS_FIX_NEW pru_cons_fix_new
+extern void pru_cons_fix_new (struct frag *frag, int where,
+				unsigned int nbytes, struct expressionS *exp,
+				const int is_pmem);
+
+/* If you define this macro, it means that `tc_gen_reloc' may return
+   multiple relocation entries for a single fixup.  In this case, the
+   return value of `tc_gen_reloc' is a pointer to a null terminated
+   array.  */
+#undef RELOC_EXPANSION_POSSIBLE
+
+/* No shared lib support, so we don't need to ensure externally
+   visible symbols can be overridden.  */
+#define EXTERN_FORCE_RELOC 0
+
+/* If defined, this macro allows control over whether fixups for a
+   given section will be processed when the linkrelax variable is
+   set.  Define it to zero and handle things in md_apply_fix instead.  */
+#define TC_LINKRELAX_FIXUP(SEG) 0
+
+/* If this macro returns non-zero, it guarantees that a relocation will be
+   emitted even when the value can be resolved locally.  Do that if
+   linkrelax is turned on.  */
+#define TC_FORCE_RELOCATION(fix)	pru_force_relocation (fix)
+#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
+  (! SEG_NORMAL (seg) || pru_force_relocation (fix))
+extern int pru_force_relocation (struct fix *);
+
+/* Do not use PC relative fixups and relocations for
+   anything but real PCREL relocations.  */
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
+  (((FIX)->fx_r_type != BFD_RELOC_PRU_S10_PCREL) \
+   && ((FIX)->fx_r_type != BFD_RELOC_PRU_U8_PCREL))
+
+/* Values passed to md_apply_fix don't include the symbol value.  */
+#define MD_APPLY_SYM_VALUE(FIX) 0
+
+/* We don't want gas to fixup the following memory related relocations.
+   We will need them in case that we want to do linker relaxation.
+   We could in principle keep these fixups in gas when not relaxing.
+   However, there is no serious performance penalty when making the linker
+   make the fixup work.  Check also that fx_addsy is not NULL, in order to
+   make sure that the fixup refers to some sort of label.  */
+#define TC_VALIDATE_FIX(FIXP,SEG,SKIP)			      \
+  if ((FIXP->fx_r_type == BFD_RELOC_PRU_LDI32		      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_U16		      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_U16_PMEMIMM	      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_S10_PCREL	      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_U8_PCREL	      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_32_PMEM	      \
+       || FIXP->fx_r_type == BFD_RELOC_PRU_16_PMEM)	      \
+      && FIXP->fx_addsy != NULL				      \
+      && FIXP->fx_subsy == NULL)			      \
+    {							      \
+      symbol_mark_used_in_reloc (FIXP->fx_addsy);	      \
+      goto SKIP;					      \
+    }
+
+/* This macro is evaluated for any fixup with a fx_subsy that
+   fixup_segment cannot reduce to a number.  If the macro returns
+   false an error will be reported.  */
+#define TC_VALIDATE_FIX_SUB(fix, seg)   pru_validate_fix_sub (fix)
+extern int pru_validate_fix_sub (struct fix *);
+
+/* We want .cfi_* pseudo-ops for generating unwind info.  */
+#define TARGET_USE_CFIPOP 1
+#define DWARF2_DEFAULT_RETURN_COLUMN 31
+#define DWARF2_CIE_DATA_ALIGNMENT (-4)
+#define tc_regname_to_dw2regnum pru_regname_to_dw2regnum
+extern int pru_regname_to_dw2regnum (char *regname);
+#define tc_cfi_frame_initial_instructions  pru_frame_initial_instructions
+extern void pru_frame_initial_instructions (void);
+
+/* The difference between same-section symbols may be affected by linker
+   relaxation, so do not resolve such expressions in the assembler.  */
+#define md_allow_local_subtract(l,r,s) pru_allow_local_subtract (l, r, s)
+extern bfd_boolean pru_allow_local_subtract (expressionS *, expressionS *,
+					     segT);
+
+#endif /* __TC_PRU__ */