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Maciej W. Rozycki 8507b6e797 MIPS16/GAS: Relax 32-bit non-PIC PC-relative synthetic instructions
Implement the relaxation of MIPS16 PC-relative synthetic LA, DLA, LW and
LD instructions to an equivalent sequence of instructions produced where
the address operand requested is out of range, absolute or requires
linker relocation, for ABIs that use 32-bit addressing and non-PIC code.

The sequence generated uses the register specified for the destination
operand as a temporary and begins with LI to load the high 16-bit part
of the address, then continues with SLL by 16 bits to move that part
into place and finally completes with a suitable operation corresponding
to the synthetic instruction used, one of: 2-argument ADDIU, 2-argument
DADDIU, absolute LW, and absolute LD respectively, providing the low
16-bit part of the address.  All instructions use the extended encoding.
As a special exception accept absolute addresses for relaxation even in
PIC code.

For example:

	la	$2, 0x12345678

produces code as:

	li	$2, 0x1234
	sll	$2, $2, 16
	addiu	$2, 0x5678

would.

Where linker relocation is required emit an R_MIPS16_HI16 relocation on
the initial LI instruction and an R_MIPS16_LO16 relocation on the final
operation.

For example (where `foo' is not local):

	lw	$3, foo

produces code as:

	li	$3, %hi(foo)
	sll	$3, $3, 16
	lw	$3, %lo(foo)($3)

would.

Emit assembly warnings as appropriate where this new relaxation triggers
in the `nomacro' mode or for an instruction manually placed in a branch
delay slot in the `noreorder' mode.  Refrain from relaxation where an
explicit instruction size suffix has been used and in the `noautoextend'
mode.

	gas/
	* config/tc-mips.c (RELAX_MIPS16_ENCODE): Add `pic', `sym32' and
	`nomacro' flags.
	(RELAX_MIPS16_PIC, RELAX_MIPS16_SYM32, RELAX_MIPS16_NOMACRO):
	New macros.
	(RELAX_MIPS16_USER_SMALL, RELAX_MIPS16_USER_EXT)
	(RELAX_MIPS16_DSLOT, RELAX_MIPS16_JAL_DSLOT)
	(RELAX_MIPS16_EXTENDED, RELAX_MIPS16_MARK_EXTENDED)
	(RELAX_MIPS16_CLEAR_EXTENDED, RELAX_MIPS16_ALWAYS_EXTENDED)
	(RELAX_MIPS16_MARK_ALWAYS_EXTENDED)
	(RELAX_MIPS16_CLEAR_ALWAYS_EXTENDED): Shift bits.
	(RELAX_MIPS16_MACRO, RELAX_MIPS16_MARK_MACRO)
	(RELAX_MIPS16_CLEAR_MACRO): New macros.
	(append_insn): Pass `mips_pic', HAVE_32BIT_SYMBOLS and
	`mips_opts.warn_about_macros' settings to RELAX_MIPS16_ENCODE.
	(mips16_macro_frag): New function.
	(md_estimate_size_before_relax): Handle HI16/LO16 relaxation.
	(mips_relax_frag): Likewise.
	(md_convert_frag): Likewise.

	* testsuite/gas/mips/mips16@relax-swap3.d: Remove error output,
	add dump patterns.
	* testsuite/gas/mips/mips16e@relax-swap3.d: New test
	subarchitecture.
	* testsuite/gas/mips/micromips@relax-swap3.d: Remove trailing
	NOP padding.
	* testsuite/gas/mips/mips16-pcrel-reloc-2.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-reloc-3.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-reloc-6.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-reloc-7.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-addend-2.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-addend-3.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-absolute.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-pcrel-absolute-1.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16@relax-swap3.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-reloc-2.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-reloc-3.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-reloc-6.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-reloc-7.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-addend-2.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-addend-3.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-absolute.l: Remove file.
	* testsuite/gas/mips/mips16-pcrel-absolute-1.l: Remove file.
	* testsuite/gas/mips/relax-swap3.s: Adjust trailing padding.

	* testsuite/gas/mips/mips16-pcrel-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-2.d: New test.
	* testsuite/gas/mips/mips16-pcrel-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-5.d: New test.
	* testsuite/gas/mips/mips16-pcrel-pic-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-pic-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n32-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n32-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n64-sym32-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n64-sym32-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n64-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-n64-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-delay-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-delay-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-5.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-7.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-8.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-9.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-pic-8.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-pic-9.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n32-8.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n32-9.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n64-sym32-8.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n64-sym32-9.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n64-8.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-n64-9.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-2.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-5.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-7.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n32-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n32-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n64-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n64-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n64-sym32-4.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-n64-sym32-6.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n32-4.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n32-6.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n64-4.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n64-6.d: New
	test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n64-sym32-4.d:
	New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-pic-n64-sym32-6.d:
	New test.
	* testsuite/gas/mips/mips16-pcrel-0.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-1.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-2.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-3.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-4.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-5.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-delay-0.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-delay-1.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-addend-8.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-addend-9.l: New stderr output.
	* testsuite/gas/mips/mips16-pcrel-absolute-4.l: New stderr
	output.
	* testsuite/gas/mips/mips16-pcrel-absolute-6.l: New stderr
	output.
	* testsuite/gas/mips/mips16-pcrel-0.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-1.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-2.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-3.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-4.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-5.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-delay-0.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-delay-1.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-4.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-5.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-6.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-7.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-8.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-9.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-absolute-2.s: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-3.s: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-4.s: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-5.s: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-6.s: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute-7.s: New test.
	* testsuite/gas/mips/mips.exp: Run the new tests.

	ld/
	* testsuite/ld-mips-elf/mips16-pcrel-0.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-1.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-addend-2.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-addend-6.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-n32-0.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-n32-1.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-n64-sym32-0.d: New test.
	* testsuite/ld-mips-elf/mips16-pcrel-n64-sym32-1.d: New test.
	* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
2017-05-03 20:47:40 +01:00
bfd Automatic date update in version.in 2017-05-03 00:00:41 +00:00
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gdb Make sure malloc is linked into gdb.cp/oranking.cc. 2017-05-03 12:41:09 -07:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
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	CC=gcc ./configure
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A similar example using csh:

	setenv CC gcc
	./configure
	make

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the Free Software Foundation, Inc.  See the file COPYING or
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on where and how to report problems.