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Pierre Langlois afbe19f83a Implement target_emit_ops
This patch implements compiling agent expressions to native code for
AArch64.  This allows us to compile conditions set on fast tracepoints.

The compiled function has the following prologue:

High *------------------------------------------------------*
     | LR                                                   |
     | FP                                                   | <- FP
     | x1  (ULONGEST *value)                                |
     | x0  (unsigned char *regs)                            |
Low  *------------------------------------------------------*

We save the function's argument on the stack as well as the return
address and the frame pointer.  We then set the current frame pointer to
point to the previous one.

The generated code for the expression will freely update the stack
pointer so we use the frame pointer to refer to `*value' and `*regs'.
`*value' needs to be accessed in the epilogue of the function, in order
to set it to whatever is on top of the stack.  `*regs' needs to be passed
down to the `gdb_agent_get_raw_reg' function with the `reg' operation.

gdb/gdbserver/ChangeLog:

	* linux-aarch64-low-.c: Include ax.h and tracepoint.h.
	(enum aarch64_opcodes) <RET>, <SUBS>, <AND>, <ORR>, <ORN>,
	<EOR>, <LSLV>, <LSRV>, <ASRV>, <SBFM>, <UBFM>, <CSINC>, <MUL>,
	<NOP>: New.
	(enum aarch64_condition_codes): New enum.
	(w0): New static global.
	(fp): Likewise.
	(lr): Likewise.
	(struct aarch64_memory_operand) <type>: New
	MEMORY_OPERAND_POSTINDEX type.
	(postindex_memory_operand): New helper function.
	(emit_ret): New function.
	(emit_load_store_pair): New function, factored out of emit_stp
	with support for MEMORY_OPERAND_POSTINDEX.
	(emit_stp): Rewrite using emit_load_store_pair.
	(emit_ldp): New function.
	(emit_load_store): Likewise.
	(emit_ldr): Mention post-index instruction in comment.
	(emit_ldrh): New function.
	(emit_ldrb): New function.
	(emit_ldrsw): Mention post-index instruction in comment.
	(emit_str): Likewise.
	(emit_subs): New function.
	(emit_cmp): Likewise.
	(emit_and): Likewise.
	(emit_orr): Likewise.
	(emit_orn): Likewise.
	(emit_eor): Likewise.
	(emit_mvn): Likewise.
	(emit_lslv): Likewise.
	(emit_lsrv): Likewise.
	(emit_asrv): Likewise.
	(emit_mul): Likewise.
	(emit_sbfm): Likewise.
	(emit_sbfx): Likewise.
	(emit_ubfm): Likewise.
	(emit_ubfx): Likewise.
	(emit_csinc): Likewise.
	(emit_cset): Likewise.
	(emit_nop): Likewise.
	(emit_ops_insns): New helper function.
	(emit_pop): Likewise.
	(emit_push): Likewise.
	(aarch64_emit_prologue): New function.
	(aarch64_emit_epilogue): Likewise.
	(aarch64_emit_add): Likewise.
	(aarch64_emit_sub): Likewise.
	(aarch64_emit_mul): Likewise.
	(aarch64_emit_lsh): Likewise.
	(aarch64_emit_rsh_signed): Likewise.
	(aarch64_emit_rsh_unsigned): Likewise.
	(aarch64_emit_ext): Likewise.
	(aarch64_emit_log_not): Likewise.
	(aarch64_emit_bit_and): Likewise.
	(aarch64_emit_bit_or): Likewise.
	(aarch64_emit_bit_xor): Likewise.
	(aarch64_emit_bit_not): Likewise.
	(aarch64_emit_equal): Likewise.
	(aarch64_emit_less_signed): Likewise.
	(aarch64_emit_less_unsigned): Likewise.
	(aarch64_emit_ref): Likewise.
	(aarch64_emit_if_goto): Likewise.
	(aarch64_emit_goto): Likewise.
	(aarch64_write_goto_address): Likewise.
	(aarch64_emit_const): Likewise.
	(aarch64_emit_call): Likewise.
	(aarch64_emit_reg): Likewise.
	(aarch64_emit_pop): Likewise.
	(aarch64_emit_stack_flush): Likewise.
	(aarch64_emit_zero_ext): Likewise.
	(aarch64_emit_swap): Likewise.
	(aarch64_emit_stack_adjust): Likewise.
	(aarch64_emit_int_call_1): Likewise.
	(aarch64_emit_void_call_2): Likewise.
	(aarch64_emit_eq_goto): Likewise.
	(aarch64_emit_ne_goto): Likewise.
	(aarch64_emit_lt_goto): Likewise.
	(aarch64_emit_le_goto): Likewise.
	(aarch64_emit_gt_goto): Likewise.
	(aarch64_emit_ge_got): Likewise.
	(aarch64_emit_ops_impl): New static global variable.
	(aarch64_emit_ops): New target function, return
	&aarch64_emit_ops_impl.
	(struct linux_target_ops): Install it.
2015-09-21 15:01:04 +01:00
bfd Automatic date update in version.in 2015-09-21 00:00:08 +00:00
binutils Adds an option to the strings program to specify a separator between the emitted pieces of text. 2015-09-10 09:29:13 +01:00
config Missing parts of fixes for in-tree libiconv 2015-08-24 10:57:03 +01:00
cpu Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
elfcpp Add chdr_size, Chdr, Chdr_write and Chdr_data 2015-04-08 10:29:40 -07:00
etc PR external/{16327,16328}: Remove etc/configure.texi and etc/standards.texi. 2014-06-27 11:33:25 +02:00
gas S/390: Fix instruction format of crj*, clrj*, and clgrj*. 2015-09-10 15:26:35 +02:00
gdb Implement target_emit_ops 2015-09-21 15:01:04 +01:00
gold Fix internal error caused by IFUNC patch. 2015-09-07 09:44:11 -07:00
gprof Remove trailing spaces in gprof 2015-08-12 04:43:32 -07:00
include Add --no-dynamic-linker option to ld, for static PIE use 2015-09-20 15:52:27 +09:30
intl Regen intl/configure 2015-08-31 12:53:36 +09:30
ld Add --no-dynamic-linker option to ld, for static PIE use 2015-09-20 15:52:27 +09:30
libdecnumber Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
libiberty PR gdb/18669 libiberty demangle.test failure: strtod() on sparc-sun-solaris2.9 2015-08-11 09:14:12 +02:00
opcodes S/390: Fix instruction format of crj*, clrj*, and clgrj*. 2015-09-10 15:26:35 +02:00
readline Revert "Sync readline/ to version 7.0 alpha" 2015-07-25 15:57:00 -04:00
sim Fix building GDB for the M32C by providing a stub sim_info function. 2015-08-05 14:58:21 +01:00
texinfo
zlib Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Sync the root .gitignore file with GCC's. 2013-01-11 15:17:35 +00:00
ChangeLog Sync config.sub and config.guess with GCC 2015-08-07 07:51:39 -07:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Sync toplevel files with GCC 2015-07-27 07:49:05 -07:00
config.guess Sync config.sub and config.guess with GCC 2015-08-07 07:51:39 -07:00
config.rpath
config.sub Sync config.sub and config.guess with GCC 2015-08-07 07:51:39 -07:00
configure Sync toplevel files with GCC 2015-07-27 07:49:05 -07:00
configure.ac Sync toplevel files with GCC 2015-07-27 07:49:05 -07:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS 2013-01-07 Jeff Johnston <jjohnstn@redhat.com> 2013-01-07 21:39:26 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
COPYING3
COPYING3.LIB
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Update libtool.m4 from GCC trunk 2014-11-24 09:14:09 -08:00
ltgcc.m4
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Yaakov Selkowitz: fixes for in-tree libiconv 2015-08-06 23:55:06 -04:00
Makefile.in Yaakov Selkowitz: fixes for in-tree libiconv 2015-08-06 23:55:06 -04:00
Makefile.tpl Sync Makefile.tpl with GCC 2015-07-14 09:52:36 -07:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
README
README-maintainer-mode
setup.com
src-release.sh Adjust src-release.sh for sim using the gdb create-version.sh. 2015-04-15 04:08:51 +02:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

		   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,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.