Support x86 pseudo byte, word and dword registers.

gdb/

2010-03-02  H.J. Lu  <hongjiu.lu@intel.com>

	* amd64-tdep.c (amd64_byte_names): New.
	(amd64_word_names): Likewise.
	(amd64_dword_names): Likewise.
	(amd64_pseudo_register_name): Likewise.
	(amd64_pseudo_register_read): Likewise.
	(amd64_pseudo_register_write): Likewise.
	(amd64_init_abi): Set num_byte_regs, num_word_regs, num_dword_regs
	and num_mmx_regs.  Call set_gdbarch_pseudo_register_read,
	set_gdbarch_pseudo_register_write and
	set_tdesc_pseudo_register_name.  Don't call
	set_gdbarch_num_pseudo_regs.  Don't set mm0_regnum.

	* i386-tdep.c (i386_num_mmx_regs): Removed.
	(i386_num_pseudo_regs): Likewise.
	(i386_byte_names): New.
	(i386_word_names): Likewise.
	(i386_byte_regnum_p): Likewise.
	(i386_word_regnum_p): Likewise.
	(i386_mmx_regnum_p): Updated.
	(i386_pseudo_register_name): Make it global.  Handle byte and
	word pseudo-registers.
	(i386_pseudo_register_read): Likewise.
	(i386_pseudo_register_write): Likewise.
	(i386_pseudo_register_type): Handle byte, word and dword
	pseudo-registers
	(i386_register_reggroup_p): Don't include pseudo
	registers, except for MXX, in any register groups.  Don't
	include pseudo byte, word, dword registers in general_reggroup.
	(i386_gdbarch_init): Set num_byte_regs, num_word_regs,
	num_dword_regs, al_regnum, ax_regnum and eax_regnum.  Put MMX
	pseudo-registers after word pseudo-registers.  Call
	set_gdbarch_num_pseudo_regs after calling gdbarch_init_osabi.

	* i386-tdep.h (gdbarch_tdep): Add num_mmx_regs, num_byte_regs,
	al_regnum, num_word_regs, ax_regnum, num_dword_regs and
	eax_regnum.
	(i386_byte_regnum_p): New.
	(i386_word_regnum_p): Likewise.
	(i386_dword_regnum_p): Likewise.
	(i386_pseudo_register_name): Likewise.
	(i386_pseudo_register_read): Likewise.
	(i386_pseudo_register_write): Likewise.

gdb/testsuite/

2010-03-02  H.J. Lu  <hongjiu.lu@intel.com>

	* gdb.arch/amd64-byte.exp: New.
	* gdb.arch/amd64-dword.exp: Likewise.
	* gdb.arch/amd64-pseudo.c: Likewise.
	* gdb.arch/amd64-word.exp: Likewise.
	* gdb.arch/i386-byte.exp: Likewise.
	* gdb.arch/i386-pseudo.c: Likewise.
	* gdb.arch/i386-word.exp: Likewise.

1 files changed, 98 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.arch/i386-byte.exp b/gdb/testsuite/gdb.arch/i386-byte.exp
new file mode 100644
index 0000000..865257d
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/i386-byte.exp
@@ -0,0 +1,98 @@
+# Copyright 2010 Free Software Foundation, Inc.
+
+# This program 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 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@gnu.org
+
+# This file is part of the gdb testsuite.
+
+if $tracelevel {
+    strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
+if { ![istarget i?86-*-*] } {
+    verbose "Skipping i386 byte register tests."
+    return
+}
+
+set testfile "i386-byte"
+set srcfile i386-pseudo.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+if [get_compiler_info ${binfile}] {
+    return -1
+}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug]] != "" } {
+    untested ${testfile}
+    return
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+if ![runto_main] then {
+    gdb_suppress_tests
+}
+
+set byte_regs(1) al
+set byte_regs(2) bl
+set byte_regs(3) cl
+set byte_regs(4) dl
+set byte_regs(5) ah
+set byte_regs(6) bh
+set byte_regs(7) ch
+set byte_regs(8) dh
+
+gdb_test "break [gdb_get_line_number "first breakpoint here"]" \
+         "Breakpoint .* at .*${srcfile}.*" \
+         "set first breakpoint in main"
+gdb_continue_to_breakpoint "continue to first breakpoint in main"
+
+for { set r 1 } { $r <= 4  } { incr r } {
+    gdb_test "print/x \$$byte_regs($r)" \
+        ".. = 0x[format %x $r]1" \
+        "check contents of %$byte_regs($r)"
+    set h [expr $r + 4]
+    gdb_test "print/x \$$byte_regs($h)" \
+        ".. = 0x[format %x $r]2" \
+        "check contents of %$byte_regs($h)"
+}
+
+for { set r 1 } { $r <= 4  } { incr r } {
+  gdb_test "set var \$$byte_regs($r) = $r" "" "set %$byte_regs($r)"
+  set h [expr $r + 4]
+  gdb_test "set var \$$byte_regs($h) = $h" "" "set %$byte_regs($h)"
+}
+
+gdb_test "break [gdb_get_line_number "second breakpoint here"]" \
+         "Breakpoint .* at .*${srcfile}.*" \
+         "set second breakpoint in main"
+gdb_continue_to_breakpoint "continue to second breakpoint in main"
+
+for { set r 1 } { $r <= 4  } { incr r } {
+    gdb_test "print \$$byte_regs($r)" \
+        ".. = $r" \
+        "check contents of %$byte_regs($r)"
+    set h [expr $r + 4]
+    gdb_test "print \$$byte_regs($h)" \
+        ".. = $h" \
+        "check contents of %$byte_regs($h)"
+}